drivers/char/cyclades.c

   1 #undef  BLOCKMOVE
   2 #define Z_WAKE
   3 #undef  Z_EXT_CHARS_IN_BUFFER
   4
   5 /*
   6  *  linux/drivers/char/cyclades.c
   7  *
   8  * This file contains the driver for the Cyclades async multiport
   9  * serial boards.
  10  *
  11  * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
  12  * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
  13  *
  14  * Copyright (C) 2007 Jiri Slaby <jirislaby@gmail.com>
  15  *
  16  * Much of the design and some of the code came from serial.c
  17  * which was copyright (C) 1991, 1992  Linus Torvalds.  It was
  18  * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
  19  * and then fixed as suggested by Michael K. Johnson 12/12/92.
  20  * Converted to pci probing and cleaned up by Jiri Slaby.
  21  *
  22  * This version supports shared IRQ's (only for PCI boards).
  23  *
  24  * $Log: cyclades.c,v $
  25  * Prevent users from opening non-existing Z ports.
  26  *
  27  * Revision 2.3.2.8   2000/07/06 18:14:16 ivan
  28  * Fixed the PCI detection function to work properly on Alpha systems.
  29  * Implemented support for TIOCSERGETLSR ioctl.
  30  * Implemented full support for non-standard baud rates.
  31  *
  32  * Revision 2.3.2.7   2000/06/01 18:26:34 ivan
  33  * Request PLX I/O region, although driver doesn't use it, to avoid
  34  * problems with other drivers accessing it.
  35  * Removed count for on-board buffer characters in cy_chars_in_buffer
  36  * (Cyclades-Z only).
  37  *
  38  * Revision 2.3.2.6   2000/05/05 13:56:05 ivan
  39  * Driver now reports physical instead of virtual memory addresses.
  40  * Masks were added to some Cyclades-Z read accesses.
  41  * Implemented workaround for PLX9050 bug that would cause a system lockup
  42  * in certain systems, depending on the MMIO addresses allocated to the
  43  * board.
  44  * Changed the Tx interrupt programming in the CD1400 chips to boost up
  45  * performance (Cyclom-Y only).
  46  * Code is now compliant with the new module interface (module_[init|exit]).
  47  * Make use of the PCI helper functions to access PCI resources.
  48  * Did some code "housekeeping".
  49  *
  50  * Revision 2.3.2.5   2000/01/19 14:35:33 ivan
  51  * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
  52  *
  53  * Revision 2.3.2.4   2000/01/17 09:19:40 ivan
  54  * Fixed SMP locking in Cyclom-Y interrupt handler.
  55  *
  56  * Revision 2.3.2.3   1999/12/28 12:11:39 ivan
  57  * Added a new cyclades_card field called nports to allow the driver to
  58  * know the exact number of ports found by the Z firmware after its load;
  59  * RX buffer contention prevention logic on interrupt op mode revisited
  60  * (Cyclades-Z only);
  61  * Revisited printk's for Z debug;
  62  * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
  63  *
  64  * Revision 2.3.2.2   1999/10/01 11:27:43 ivan
  65  * Fixed bug in cyz_poll that would make all ports but port 0
  66  * unable to transmit/receive data (Cyclades-Z only);
  67  * Implemented logic to prevent the RX buffer from being stuck with data
  68  * due to a driver / firmware race condition in interrupt op mode
  69  * (Cyclades-Z only);
  70  * Fixed bug in block_til_ready logic that would lead to a system crash;
  71  * Revisited cy_close spinlock usage;
  72  *
  73  * Revision 2.3.2.1   1999/09/28 11:01:22 ivan
  74  * Revisited CONFIG_PCI conditional compilation for PCI board support;
  75  * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
  76  * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
  77  * Removed CTS handling from the driver -- this is now completely handled
  78  * by the firmware (Cyclades-Z only);
  79  * Flush RX on-board buffers on a port open (Cyclades-Z only);
  80  * Fixed handling of ASYNC_SPD_* TTY flags;
  81  * Module unload now unmaps all memory area allocated by ioremap;
  82  *
  83  * Revision 2.3.1.1   1999/07/15 16:45:53 ivan
  84  * Removed CY_PROC conditional compilation;
  85  * Implemented SMP-awareness for the driver;
  86  * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
  87  * functions;
  88  * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
  89  * (irq=NN) as parameters (only for ISA boards);
  90  * Fixed bug in set_line_char that would prevent the Cyclades-Z
  91  * ports from being configured at speeds above 115.2Kbps;
  92  * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
  93  * switching from working properly;
  94  * The driver now only prints IRQ info for the Cyclades-Z if it's
  95  * configured to work in interrupt mode;
  96  *
  97  * Revision 2.2.2.3   1999/06/28 11:13:29 ivan
  98  * Added support for interrupt mode operation for the Z cards;
  99  * Removed the driver inactivity control for the Z;
 100  * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
 101  * the Z firmware is not loaded yet;
 102  * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
 103  * same functionality;
 104  * Implemented workaround for IRQ setting loss on the PCI configuration
 105  * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
 106  *
 107  * Revision 2.2.2.2  1999/05/14 17:18:15 ivan
 108  * /proc entry location changed to /proc/tty/driver/cyclades;
 109  * Added support to shared IRQ's (only for PCI boards);
 110  * Added support for Cobalt Qube2 systems;
 111  * IRQ [de]allocation scheme revisited;
 112  * BREAK implementation changed in order to make use of the 'break_ctl'
 113  * TTY facility;
 114  * Fixed typo in TTY structure field 'driver_name';
 115  * Included a PCI bridge reset and EEPROM reload in the board
 116  * initialization code (for both Y and Z series).
 117  *
 118  * Revision 2.2.2.1  1999/04/08 16:17:43 ivan
 119  * Fixed a bug in cy_wait_until_sent that was preventing the port to be
 120  * closed properly after a SIGINT;
 121  * Module usage counter scheme revisited;
 122  * Added support to the upcoming Y PCI boards (i.e., support to additional
 123  * PCI Device ID's).
 124  *
 125  * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
 126  * Removed all unnecessary page-alignement operations in ioremap calls
 127  * (ioremap is currently safe for these operations).
 128  *
 129  * Revision 2.2.1.9  1998/12/30 18:18:30 ivan
 130  * Changed access to PLX PCI bridge registers from I/O to MMIO, in
 131  * order to make PLX9050-based boards work with certain motherboards.
 132  *
 133  * Revision 2.2.1.8  1998/11/13 12:46:20 ivan
 134  * cy_close function now resets (correctly) the tty->closing flag;
 135  * JIFFIES_DIFF macro fixed.
 136  *
 137  * Revision 2.2.1.7  1998/09/03 12:07:28 ivan
 138  * Fixed bug in cy_close function, which was not informing HW of
 139  * which port should have the reception disabled before doing so;
 140  * fixed Cyclom-8YoP hardware detection bug.
 141  *
 142  * Revision 2.2.1.6  1998/08/20 17:15:39 ivan
 143  * Fixed bug in cy_close function, which causes malfunction
 144  * of one of the first 4 ports when a higher port is closed
 145  * (Cyclom-Y only).
 146  *
 147  * Revision 2.2.1.5  1998/08/10 18:10:28 ivan
 148  * Fixed Cyclom-4Yo hardware detection bug.
 149  *
 150  * Revision 2.2.1.4  1998/08/04 11:02:50 ivan
 151  * /proc/cyclades implementation with great collaboration of
 152  * Marc Lewis <marc@blarg.net>;
 153  * cyy_interrupt was changed to avoid occurrence of kernel oopses
 154  * during PPP operation.
 155  *
 156  * Revision 2.2.1.3  1998/06/01 12:09:10 ivan
 157  * General code review in order to comply with 2.1 kernel standards;
 158  * data loss prevention for slow devices revisited (cy_wait_until_sent
 159  * was created);
 160  * removed conditional compilation for new/old PCI structure support
 161  * (now the driver only supports the new PCI structure).
 162  *
 163  * Revision 2.2.1.1  1998/03/19 16:43:12 ivan
 164  * added conditional compilation for new/old PCI structure support;
 165  * removed kernel series (2.0.x / 2.1.x) conditional compilation.
 166  *
 167  * Revision 2.1.1.3  1998/03/16 18:01:12 ivan
 168  * cleaned up the data loss fix;
 169  * fixed XON/XOFF handling once more (Cyclades-Z);
 170  * general review of the driver routines;
 171  * introduction of a mechanism to prevent data loss with slow
 172  * printers, by forcing a delay before closing the port.
 173  *
 174  * Revision 2.1.1.2  1998/02/17 16:50:00 ivan
 175  * fixed detection/handling of new CD1400 in Ye boards;
 176  * fixed XON/XOFF handling (Cyclades-Z);
 177  * fixed data loss caused by a premature port close;
 178  * introduction of a flag that holds the CD1400 version ID per port
 179  * (used by the CYGETCD1400VER new ioctl).
 180  *
 181  * Revision 2.1.1.1  1997/12/03 17:31:19 ivan
 182  * Code review for the module cleanup routine;
 183  * fixed RTS and DTR status report for new CD1400's in get_modem_info;
 184  * includes anonymous changes regarding signal_pending.
 185  *
 186  * Revision 2.1  1997/11/01 17:42:41 ivan
 187  * Changes in the driver to support Alpha systems (except 8Zo V_1);
 188  * BREAK fix for the Cyclades-Z boards;
 189  * driver inactivity control by FW implemented;
 190  * introduction of flag that allows driver to take advantage of
 191  * a special CD1400 feature related to HW flow control;
 192  * added support for the CD1400  rev. J (Cyclom-Y boards);
 193  * introduction of ioctls to:
 194  *  - control the rtsdtr_inv flag (Cyclom-Y);
 195  *  - control the rflow flag (Cyclom-Y);
 196  *  - adjust the polling interval (Cyclades-Z);
 197  *
 198  * Revision 1.36.4.33  1997/06/27 19:00:00  ivan
 199  * Fixes related to kernel version conditional
 200  * compilation.
 201  *
 202  * Revision 1.36.4.32  1997/06/14 19:30:00  ivan
 203  * Compatibility issues between kernels 2.0.x and
 204  * 2.1.x (mainly related to clear_bit function).
 205  *
 206  * Revision 1.36.4.31  1997/06/03 15:30:00  ivan
 207  * Changes to define the memory window according to the
 208  * board type.
 209  *
 210  * Revision 1.36.4.30  1997/05/16 15:30:00  daniel
 211  * Changes to support new cycladesZ boards.
 212  *
 213  * Revision 1.36.4.29  1997/05/12 11:30:00  daniel
 214  * Merge of Bentson's and Daniel's version 1.36.4.28.
 215  * Corrects bug in cy_detect_pci: check if there are more
 216  * ports than the number of static structs allocated.
 217  * Warning message during initialization if this driver is
 218  * used with the new generation of cycladesZ boards.  Those
 219  * will be supported only in next release of the driver.
 220  * Corrects bug in cy_detect_pci and cy_detect_isa that
 221  * returned wrong number of VALID boards, when a cyclomY
 222  * was found with no serial modules connected.
 223  * Changes to use current (2.1.x) kernel subroutine names
 224  * and created macros for compilation with 2.0.x kernel,
 225  * instead of the other way around.
 226  *
 227  * Revision 1.36.4.28  1997/05/?? ??:00:00  bentson
 228  * Change queue_task_irq_off to queue_task_irq.
 229  * The inline function queue_task_irq_off (tqueue.h)
 230  * was removed from latest releases of 2.1.x kernel.
 231  * Use of macro __init to mark the initialization
 232  * routines, so memory can be reused.
 233  * Also incorporate implementation of critical region
 234  * in function cleanup_module() created by anonymous
 235  * linuxer.
 236  *
 237  * Revision 1.36.4.28  1997/04/25 16:00:00  daniel
 238  * Change to support new firmware that solves DCD problem:
 239  * application could fail to receive SIGHUP signal when DCD
 240  * varying too fast.
 241  *
 242  * Revision 1.36.4.27  1997/03/26 10:30:00  daniel
 243  * Changed for support linux versions 2.1.X.
 244  * Backward compatible with linux versions 2.0.X.
 245  * Corrected illegal use of filler field in
 246  * CH_CTRL struct.
 247  * Deleted some debug messages.
 248  *
 249  * Revision 1.36.4.26  1997/02/27 12:00:00  daniel
 250  * Included check for NULL tty pointer in cyz_poll.
 251  *
 252  * Revision 1.36.4.25  1997/02/26 16:28:30  bentson
 253  * Bill Foster at Blarg! Online services noticed that
 254  * some of the switch elements of -Z modem control
 255  * lacked a closing "break;"
 256  *
 257  * Revision 1.36.4.24  1997/02/24 11:00:00  daniel
 258  * Changed low water threshold for buffer xmit_buf
 259  *
 260  * Revision 1.36.4.23  1996/12/02 21:50:16  bentson
 261  * Marcio provided fix to modem status fetch for -Z
 262  *
 263  * Revision 1.36.4.22  1996/10/28 22:41:17  bentson
 264  * improve mapping of -Z control page (thanks to Steve
 265  * Price <stevep@fa.tdktca.com> for help on this)
 266  *
 267  * Revision 1.36.4.21  1996/09/10 17:00:10  bentson
 268  * shift from CPU-bound to memcopy in cyz_polling operation
 269  *
 270  * Revision 1.36.4.20  1996/09/09 18:30:32  Bentson
 271  * Added support to set and report higher speeds.
 272  *
 273  * Revision 1.36.4.19c  1996/08/09 10:00:00  Marcio Saito
 274  * Some fixes in the HW flow control for the BETA release.
 275  * Don't try to register the IRQ.
 276  *
 277  * Revision 1.36.4.19  1996/08/08 16:23:18  Bentson
 278  * make sure "cyc" appears in all kernel messages; all soft interrupts
 279  * handled by same routine; recognize out-of-band reception; comment
 280  * out some diagnostic messages; leave RTS/CTS flow control to hardware;
 281  * fix race condition in -Z buffer management; only -Y needs to explicitly
 282  * flush chars; tidy up some startup messages;
 283  *
 284  * Revision 1.36.4.18  1996/07/25 18:57:31  bentson
 285  * shift MOD_INC_USE_COUNT location to match
 286  * serial.c; purge some diagnostic messages;
 287  *
 288  * Revision 1.36.4.17  1996/07/25 18:01:08  bentson
 289  * enable modem status messages and fetch & process them; note
 290  * time of last activity type for each port; set_line_char now
 291  * supports more than line 0 and treats 0 baud correctly;
 292  * get_modem_info senses rs_status;
 293  *
 294  * Revision 1.36.4.16  1996/07/20 08:43:15  bentson
 295  * barely works--now's time to turn on
 296  * more features 'til it breaks
 297  *
 298  * Revision 1.36.4.15  1996/07/19 22:30:06  bentson
 299  * check more -Z board status; shorten boot message
 300  *
 301  * Revision 1.36.4.14  1996/07/19 22:20:37  bentson
 302  * fix reference to ch_ctrl in startup; verify return
 303  * values from cyz_issue_cmd and cyz_update_channel;
 304  * more stuff to get modem control correct;
 305  *
 306  * Revision 1.36.4.13  1996/07/11 19:53:33  bentson
 307  * more -Z stuff folded in; re-order changes to put -Z stuff
 308  * after -Y stuff (to make changes clearer)
 309  *
 310  * Revision 1.36.4.12  1996/07/11 15:40:55  bentson
 311  * Add code to poll Cyclades-Z.  Add code to get & set RS-232 control.
 312  * Add code to send break.  Clear firmware ID word at startup (so
 313  * that other code won't talk to inactive board).
 314  *
 315  * Revision 1.36.4.11  1996/07/09 05:28:29  bentson
 316  * add code for -Z in set_line_char
 317  *
 318  * Revision 1.36.4.10  1996/07/08 19:28:37  bentson
 319  * fold more -Z stuff (or in some cases, error messages)
 320  * into driver; add text to "don't know what to do" messages.
 321  *
 322  * Revision 1.36.4.9  1996/07/08 18:38:38  bentson
 323  * moved compile-time flags near top of file; cosmetic changes
 324  * to narrow text (to allow 2-up printing); changed many declarations
 325  * to "static" to limit external symbols; shuffled code order to
 326  * coalesce -Y and -Z specific code, also to put internal functions
 327  * in order of tty_driver structure; added code to recognize -Z
 328  * ports (and for moment, do nothing or report error); add cy_startup
 329  * to parse boot command line for extra base addresses for ISA probes;
 330  *
 331  * Revision 1.36.4.8  1996/06/25 17:40:19  bentson
 332  * reorder some code, fix types of some vars (int vs. long),
 333  * add cy_setup to support user declared ISA addresses
 334  *
 335  * Revision 1.36.4.7  1996/06/21 23:06:18  bentson
 336  * dump ioctl based firmware load (it's now a user level
 337  * program); ensure uninitialzed ports cannot be used
 338  *
 339  * Revision 1.36.4.6  1996/06/20 23:17:19  bentson
 340  * rename vars and restructure some code
 341  *
 342  * Revision 1.36.4.5  1996/06/14 15:09:44  bentson
 343  * get right status back after boot load
 344  *
 345  * Revision 1.36.4.4  1996/06/13 19:51:44  bentson
 346  * successfully loads firmware
 347  *
 348  * Revision 1.36.4.3  1996/06/13 06:08:33  bentson
 349  * add more of the code for the boot/load ioctls
 350  *
 351  * Revision 1.36.4.2  1996/06/11 21:00:51  bentson
 352  * start to add Z functionality--starting with ioctl
 353  * for loading firmware
 354  *
 355  * Revision 1.36.4.1  1996/06/10 18:03:02  bentson
 356  * added code to recognize Z/PCI card at initialization; report
 357  * presence, but card is not initialized (because firmware needs
 358  * to be loaded)
 359  *
 360  * Revision 1.36.3.8  1996/06/07 16:29:00  bentson
 361  * starting minor number at zero; added missing verify_area
 362  * as noted by Heiko Eissfeldt <heiko@colossus.escape.de>
 363  *
 364  * Revision 1.36.3.7  1996/04/19 21:06:18  bentson
 365  * remove unneeded boot message & fix CLOCAL hardware flow
 366  * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
 367  * remove unused diagnostic statements; minor 0 is first;
 368  *
 369  * Revision 1.36.3.6  1996/03/13 13:21:17  marcio
 370  * The kernel function vremap (available only in later 1.3.xx kernels)
 371  * allows the access to memory addresses above the RAM. This revision
 372  * of the driver supports PCI boards below 1Mb (device id 0x100) and
 373  * above 1Mb (device id 0x101).
 374  *
 375  * Revision 1.36.3.5  1996/03/07 15:20:17  bentson
 376  * Some global changes to interrupt handling spilled into
 377  * this driver--mostly unused arguments in system function
 378  * calls.  Also added change by Marcio Saito which should
 379  * reduce lost interrupts at startup by fast processors.
 380  *
 381  * Revision 1.36.3.4  1995/11/13  20:45:10  bentson
 382  * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
 383  * in 1.3.41 kernel to remove a possible race condition, extend
 384  * some error messages, and let the driver run as a loadable module
 385  * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
 386  * possible race condition.
 387  * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
 388  *
 389  * Revision 1.36.3.3  1995/11/13  19:44:48  bentson
 390  * Changes by Linus Torvalds in 1.3.33 kernel distribution
 391  * required due to reordering of driver initialization.
 392  * Drivers are now initialized *after* memory management.
 393  *
 394  * Revision 1.36.3.2  1995/09/08  22:07:14  bentson
 395  * remove printk from ISR; fix typo
 396  *
 397  * Revision 1.36.3.1  1995/09/01  12:00:42  marcio
 398  * Minor fixes in the PCI board support. PCI function calls in
 399  * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
 400  * <duncan@okay.com>. "bad serial count" message removed.
 401  *
 402  * Revision 1.36.3  1995/08/22  09:19:42  marcio
 403  * Cyclom-Y/PCI support added. Changes in the cy_init routine and
 404  * board initialization. Changes in the boot messages. The driver
 405  * supports up to 4 boards and 64 ports by default.
 406  *
 407  * Revision 1.36.1.4  1995/03/29  06:14:14  bentson
 408  * disambiguate between Cyclom-16Y and Cyclom-32Ye;
 409  *
 410  * Revision 1.36.1.3  1995/03/23  22:15:35  bentson
 411  * add missing break in modem control block in ioctl switch statement
 412  * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
 413  *
 414  * Revision 1.36.1.2  1995/03/22  19:16:22  bentson
 415  * make sure CTS flow control is set as soon as possible (thanks
 416  * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
 417  *
 418  * Revision 1.36.1.1  1995/03/13  15:44:43  bentson
 419  * initialize defaults for receive threshold and stale data timeout;
 420  * cosmetic changes;
 421  *
 422  * Revision 1.36  1995/03/10  23:33:53  bentson
 423  * added support of chips 4-7 in 32 port Cyclom-Ye;
 424  * fix cy_interrupt pointer dereference problem
 425  * (Joe Portman <baron@aa.net>);
 426  * give better error response if open is attempted on non-existent port
 427  * (Zachariah Vaum <jchryslr@netcom.com>);
 428  * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
 429  * conditional compilation for -16Y on systems with fast, noisy bus;
 430  * comment out diagnostic print function;
 431  * cleaned up table of base addresses;
 432  * set receiver time-out period register to correct value,
 433  * set receive threshold to better default values,
 434  * set chip timer to more accurate 200 Hz ticking,
 435  * add code to monitor and modify receive parameters
 436  * (Rik Faith <faith@cs.unc.edu> Nick Simicich
 437  * <njs@scifi.emi.net>);
 438  *
 439  * Revision 1.35  1994/12/16  13:54:18  steffen
 440  * additional patch by Marcio Saito for board detection
 441  * Accidently left out in 1.34
 442  *
 443  * Revision 1.34  1994/12/10  12:37:12  steffen
 444  * This is the corrected version as suggested by Marcio Saito
 445  *
 446  * Revision 1.33  1994/12/01  22:41:18  bentson
 447  * add hooks to support more high speeds directly; add tytso
 448  * patch regarding CLOCAL wakeups
 449  *
 450  * Revision 1.32  1994/11/23  19:50:04  bentson
 451  * allow direct kernel control of higher signalling rates;
 452  * look for cards at additional locations
 453  *
 454  * Revision 1.31  1994/11/16  04:33:28  bentson
 455  * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
 456  * a problem in chars_in_buffer has been resolved by some
 457  * small changes;  this should yield smoother output
 458  *
 459  * Revision 1.30  1994/11/16  04:28:05  bentson
 460  * Fix from Corey Minyard, Internet: minyard@metronet.com,
 461  * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
 462  * cy_hangup that appears to clear up much (all?) of the
 463  * DTR glitches; also he's added/cleaned-up diagnostic messages
 464  *
 465  * Revision 1.29  1994/11/16  04:16:07  bentson
 466  * add change proposed by Ralph Sims, ralphs@halcyon.com, to
 467  * operate higher speeds in same way as other serial ports;
 468  * add more serial ports (for up to two 16-port muxes).
 469  *
 470  * Revision 1.28  1994/11/04  00:13:16  root
 471  * turn off diagnostic messages
 472  *
 473  * Revision 1.27  1994/11/03  23:46:37  root
 474  * bunch of changes to bring driver into greater conformance
 475  * with the serial.c driver (looking for missed fixes)
 476  *
 477  * Revision 1.26  1994/11/03  22:40:36  root
 478  * automatic interrupt probing fixed.
 479  *
 480  * Revision 1.25  1994/11/03  20:17:02  root
 481  * start to implement auto-irq
 482  *
 483  * Revision 1.24  1994/11/03  18:01:55  root
 484  * still working on modem signals--trying not to drop DTR
 485  * during the getty/login processes
 486  *
 487  * Revision 1.23  1994/11/03  17:51:36  root
 488  * extend baud rate support; set receive threshold as function
 489  * of baud rate; fix some problems with RTS/CTS;
 490  *
 491  * Revision 1.22  1994/11/02  18:05:35  root
 492  * changed arguments to udelay to type long to get
 493  * delays to be of correct duration
 494  *
 495  * Revision 1.21  1994/11/02  17:37:30  root
 496  * employ udelay (after calibrating loops_per_second earlier
 497  * in init/main.c) instead of using home-grown delay routines
 498  *
 499  * Revision 1.20  1994/11/02  03:11:38  root
 500  * cy_chars_in_buffer forces a return value of 0 to let
 501  * login work (don't know why it does); some functions
 502  * that were returning EFAULT, now executes the code;
 503  * more work on deciding when to disable xmit interrupts;
 504  *
 505  * Revision 1.19  1994/11/01  20:10:14  root
 506  * define routine to start transmission interrupts (by enabling
 507  * transmit interrupts); directly enable/disable modem interrupts;
 508  *
 509  * Revision 1.18  1994/11/01  18:40:45  bentson
 510  * Don't always enable transmit interrupts in startup; interrupt on
 511  * TxMpty instead of TxRdy to help characters get out before shutdown;
 512  * restructure xmit interrupt to check for chars first and quit if
 513  * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
 514  * (to my view);
 515  *
 516  * Revision 1.17  1994/10/30  04:39:45  bentson
 517  * rename serial_driver and callout_driver to cy_serial_driver and
 518  * cy_callout_driver to avoid linkage interference; initialize
 519  * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
 520  * from cyclades_port structure; add paranoia check to cy_close;
 521  *
 522  * Revision 1.16  1994/10/30  01:14:33  bentson
 523  * change major numbers; add some _early_ return statements;
 524  *
 525  * Revision 1.15  1994/10/29  06:43:15  bentson
 526  * final tidying up for clean compile;  enable some error reporting
 527  *
 528  * Revision 1.14  1994/10/28  20:30:22  Bentson
 529  * lots of changes to drag the driver towards the new tty_io
 530  * structures and operation.  not expected to work, but may
 531  * compile cleanly.
 532  *
 533  * Revision 1.13  1994/07/21  23:08:57  Bentson
 534  * add some diagnostic cruft; support 24 lines (for testing
 535  * both -8Y and -16Y cards; be more thorough in servicing all
 536  * chips during interrupt; add "volatile" a few places to
 537  * circumvent compiler optimizations; fix base & offset
 538  * computations in block_til_ready (was causing chip 0 to
 539  * stop operation)
 540  *
 541  * Revision 1.12  1994/07/19  16:42:11  Bentson
 542  * add some hackery for kernel version 1.1.8; expand
 543  * error messages; refine timing for delay loops and
 544  * declare loop params volatile
 545  *
 546  * Revision 1.11  1994/06/11  21:53:10  bentson
 547  * get use of save_car right in transmit interrupt service
 548  *
 549  * Revision 1.10.1.1  1994/06/11  21:31:18  bentson
 550  * add some diagnostic printing; try to fix save_car stuff
 551  *
 552  * Revision 1.10  1994/06/11  20:36:08  bentson
 553  * clean up compiler warnings
 554  *
 555  * Revision 1.9  1994/06/11  19:42:46  bentson
 556  * added a bunch of code to support modem signalling
 557  *
 558  * Revision 1.8  1994/06/11  17:57:07  bentson
 559  * recognize break & parity error
 560  *
 561  * Revision 1.7  1994/06/05  05:51:34  bentson
 562  * Reorder baud table to be monotonic; add cli to CP; discard
 563  * incoming characters and status if the line isn't open; start to
 564  * fold code into cy_throttle; start to port get_serial_info,
 565  * set_serial_info, get_modem_info, set_modem_info, and send_break
 566  * from serial.c; expand cy_ioctl; relocate and expand config_setup;
 567  * get flow control characters from tty struct; invalidate ports w/o
 568  * hardware;
 569  *
 570  * Revision 1.6  1994/05/31  18:42:21  bentson
 571  * add a loop-breaker in the interrupt service routine;
 572  * note when port is initialized so that it can be shut
 573  * down under the right conditions; receive works without
 574  * any obvious errors
 575  *
 576  * Revision 1.5  1994/05/30  00:55:02  bentson
 577  * transmit works without obvious errors
 578  *
 579  * Revision 1.4  1994/05/27  18:46:27  bentson
 580  * incorporated more code from lib_y.c; can now print short
 581  * strings under interrupt control to port zero; seems to
 582  * select ports/channels/lines correctly
 583  *
 584  * Revision 1.3  1994/05/25  22:12:44  bentson
 585  * shifting from multi-port on a card to proper multiplexor
 586  * data structures;  added skeletons of most routines
 587  *
 588  * Revision 1.2  1994/05/19  13:21:43  bentson
 589  * start to crib from other sources
 590  *
 591  */
 592
 593 #define CY_VERSION      "2.5"
 594
 595 /* If you need to install more boards than NR_CARDS, change the constant
 596    in the definition below. No other change is necessary to support up to
 597    eight boards. Beyond that you'll have to extend cy_isa_addresses. */
 598
 599 #define NR_CARDS        4
 600
 601 /*
 602    If the total number of ports is larger than NR_PORTS, change this
 603    constant in the definition below. No other change is necessary to
 604    support more boards/ports. */
 605
 606 #define NR_PORTS        256
 607
 608 #define ZE_V1_NPORTS    64
 609 #define ZO_V1   0
 610 #define ZO_V2   1
 611 #define ZE_V1   2
 612
 613 #define SERIAL_PARANOIA_CHECK
 614 #undef  CY_DEBUG_OPEN
 615 #undef  CY_DEBUG_THROTTLE
 616 #undef  CY_DEBUG_OTHER
 617 #undef  CY_DEBUG_IO
 618 #undef  CY_DEBUG_COUNT
 619 #undef  CY_DEBUG_DTR
 620 #undef  CY_DEBUG_WAIT_UNTIL_SENT
 621 #undef  CY_DEBUG_INTERRUPTS
 622 #undef  CY_16Y_HACK
 623 #undef  CY_ENABLE_MONITORING
 624 #undef  CY_PCI_DEBUG
 625
 626 /*
 627  * Include section
 628  */
 629 #include <linux/module.h>
 630 #include <linux/errno.h>
 631 #include <linux/signal.h>
 632 #include <linux/sched.h>
 633 #include <linux/timer.h>
 634 #include <linux/interrupt.h>
 635 #include <linux/tty.h>
 636 #include <linux/tty_flip.h>
 637 #include <linux/serial.h>
 638 #include <linux/major.h>
 639 #include <linux/string.h>
 640 #include <linux/fcntl.h>
 641 #include <linux/ptrace.h>
 642 #include <linux/cyclades.h>
 643 #include <linux/mm.h>
 644 #include <linux/ioport.h>
 645 #include <linux/init.h>
 646 #include <linux/delay.h>
 647 #include <linux/spinlock.h>
 648 #include <linux/bitops.h>
 649 #include <linux/firmware.h>
 650
 651 #include <asm/system.h>
 652 #include <asm/io.h>
 653 #include <asm/irq.h>
 654 #include <asm/uaccess.h>
 655
 656 #include <linux/kernel.h>
 657 #include <linux/pci.h>
 658
 659 #include <linux/stat.h>
 660 #include <linux/proc_fs.h>
 661
 662 static void cy_throttle(struct tty_struct *tty);
 663 static void cy_send_xchar(struct tty_struct *tty, char ch);
 664
 665 #define IS_CYC_Z(card) ((card).num_chips == -1)
 666
 667 #define Z_FPGA_CHECK(card) \
 668         ((readl(&((struct RUNTIME_9060 __iomem *) \
 669                 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
 670
 671 #define ISZLOADED(card) (((ZO_V1==readl(&((struct RUNTIME_9060 __iomem *) \
 672                         ((card).ctl_addr))->mail_box_0)) || \
 673                         Z_FPGA_CHECK(card)) && \
 674                         (ZFIRM_ID==readl(&((struct FIRM_ID __iomem *) \
 675                         ((card).base_addr+ID_ADDRESS))->signature)))
 676
 677 #ifndef SERIAL_XMIT_SIZE
 678 #define SERIAL_XMIT_SIZE        (min(PAGE_SIZE, 4096))
 679 #endif
 680 #define WAKEUP_CHARS            256
 681
 682 #define STD_COM_FLAGS (0)
 683
 684 /* firmware stuff */
 685 #define ZL_MAX_BLOCKS   16
 686 #define DRIVER_VERSION  0x02010203
 687 #define RAM_SIZE 0x80000
 688
 689 #define Z_FPGA_LOADED(X)        ((readl(&(X)->init_ctrl) & (1<<17)) != 0)
 690
 691 enum zblock_type {
 692         ZBLOCK_PRG = 0,
 693         ZBLOCK_FPGA = 1
 694 };
 695
 696 struct zfile_header {
 697         char name[64];
 698         char date[32];
 699         char aux[32];
 700         u32 n_config;
 701         u32 config_offset;
 702         u32 n_blocks;
 703         u32 block_offset;
 704         u32 reserved[9];
 705 } __attribute__ ((packed));
 706
 707 struct zfile_config {
 708         char name[64];
 709         u32 mailbox;
 710         u32 function;
 711         u32 n_blocks;
 712         u32 block_list[ZL_MAX_BLOCKS];
 713 } __attribute__ ((packed));
 714
 715 struct zfile_block {
 716         u32 type;
 717         u32 file_offset;
 718         u32 ram_offset;
 719         u32 size;
 720 } __attribute__ ((packed));
 721
 722 static struct tty_driver *cy_serial_driver;
 723
 724 #ifdef CONFIG_ISA
 725 /* This is the address lookup table. The driver will probe for
 726    Cyclom-Y/ISA boards at all addresses in here. If you want the
 727    driver to probe addresses at a different address, add it to
 728    this table.  If the driver is probing some other board and
 729    causing problems, remove the offending address from this table.
 730    The cy_setup function extracts additional addresses from the
 731    boot options line.  The form is "cyclades=address,address..."
 732 */
 733
 734 static unsigned int cy_isa_addresses[] = {
 735         0xD0000,
 736         0xD2000,
 737         0xD4000,
 738         0xD6000,
 739         0xD8000,
 740         0xDA000,
 741         0xDC000,
 742         0xDE000,
 743         0, 0, 0, 0, 0, 0, 0, 0
 744 };
 745
 746 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
 747
 748 #ifdef MODULE
 749 static long maddr[NR_CARDS];
 750 static int irq[NR_CARDS];
 751
 752 module_param_array(maddr, long, NULL, 0);
 753 module_param_array(irq, int, NULL, 0);
 754 #endif
 755
 756 #endif                          /* CONFIG_ISA */
 757
 758 /* This is the per-card data structure containing address, irq, number of
 759    channels, etc. This driver supports a maximum of NR_CARDS cards.
 760 */
 761 static struct cyclades_card cy_card[NR_CARDS];
 762
 763 static int cy_next_channel;     /* next minor available */
 764
 765 /*
 766  * This is used to look up the divisor speeds and the timeouts
 767  * We're normally limited to 15 distinct baud rates.  The extra
 768  * are accessed via settings in info->flags.
 769  *      0,     1,     2,     3,     4,     5,     6,     7,     8,     9,
 770  *     10,    11,    12,    13,    14,    15,    16,    17,    18,    19,
 771  *                                               HI            VHI
 772  *     20
 773  */
 774 static int baud_table[] = {
 775         0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
 776         1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
 777         230400, 0
 778 };
 779
 780 static char baud_co_25[] = {    /* 25 MHz clock option table */
 781         /* value =>    00    01   02    03    04 */
 782         /* divide by    8    32   128   512  2048 */
 783         0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
 784         0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
 785 };
 786
 787 static char baud_bpr_25[] = {   /* 25 MHz baud rate period table */
 788         0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
 789         0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
 790 };
 791
 792 static char baud_co_60[] = {    /* 60 MHz clock option table (CD1400 J) */
 793         /* value =>    00    01   02    03    04 */
 794         /* divide by    8    32   128   512  2048 */
 795         0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
 796         0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
 797         0x00
 798 };
 799
 800 static char baud_bpr_60[] = {   /* 60 MHz baud rate period table (CD1400 J) */
 801         0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
 802         0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
 803         0x21
 804 };
 805
 806 static char baud_cor3[] = {     /* receive threshold */
 807         0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
 808         0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
 809         0x07
 810 };
 811
 812 /*
 813  * The Cyclades driver implements HW flow control as any serial driver.
 814  * The cyclades_port structure member rflow and the vector rflow_thr
 815  * allows us to take advantage of a special feature in the CD1400 to avoid
 816  * data loss even when the system interrupt latency is too high. These flags
 817  * are to be used only with very special applications. Setting these flags
 818  * requires the use of a special cable (DTR and RTS reversed). In the new
 819  * CD1400-based boards (rev. 6.00 or later), there is no need for special
 820  * cables.
 821  */
 822
 823 static char rflow_thr[] = {     /* rflow threshold */
 824         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 825         0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
 826         0x0a
 827 };
 828
 829 /*  The Cyclom-Ye has placed the sequential chips in non-sequential
 830  *  address order.  This look-up table overcomes that problem.
 831  */
 832 static int cy_chip_offset[] = { 0x0000,
 833         0x0400,
 834         0x0800,
 835         0x0C00,
 836         0x0200,
 837         0x0600,
 838         0x0A00,
 839         0x0E00
 840 };
 841
 842 /* PCI related definitions */
 843
 844 #ifdef CONFIG_PCI
 845 static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
 846         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },      /* PCI < 1Mb */
 847         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },      /* PCI > 1Mb */
 848         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },     /* 4Y PCI < 1Mb */
 849         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },     /* 4Y PCI > 1Mb */
 850         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },     /* 8Y PCI < 1Mb */
 851         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },     /* 8Y PCI > 1Mb */
 852         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },      /* Z PCI < 1Mb */
 853         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },      /* Z PCI > 1Mb */
 854         { }                     /* end of table */
 855 };
 856 MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
 857 #endif
 858
 859 static void cy_start(struct tty_struct *);
 860 static void set_line_char(struct cyclades_port *);
 861 static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
 862 #ifdef CONFIG_ISA
 863 static unsigned detect_isa_irq(void __iomem *);
 864 #endif                          /* CONFIG_ISA */
 865
 866 static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
 867
 868 #ifndef CONFIG_CYZ_INTR
 869 static void cyz_poll(unsigned long);
 870
 871 /* The Cyclades-Z polling cycle is defined by this variable */
 872 static long cyz_polling_cycle = CZ_DEF_POLL;
 873
 874 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
 875
 876 #else                           /* CONFIG_CYZ_INTR */
 877 static void cyz_rx_restart(unsigned long);
 878 static struct timer_list cyz_rx_full_timer[NR_PORTS];
 879 #endif                          /* CONFIG_CYZ_INTR */
 880
 881 static inline int serial_paranoia_check(struct cyclades_port *info,
 882                 char *name, const char *routine)
 883 {
 884 #ifdef SERIAL_PARANOIA_CHECK
 885         if (!info) {
 886                 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
 887                                 "in %s\n", name, routine);
 888                 return 1;
 889         }
 890
 891         if (info->magic != CYCLADES_MAGIC) {
 892                 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
 893                                 "struct (%s) in %s\n", name, routine);
 894                 return 1;
 895         }
 896 #endif
 897         return 0;
 898 }                               /* serial_paranoia_check */
 899
 900 /*
 901  * This routine is used by the interrupt handler to schedule
 902  * processing in the software interrupt portion of the driver
 903  * (also known as the "bottom half").  This can be called any
 904  * number of times for any channel without harm.
 905  */
 906 static inline void cy_sched_event(struct cyclades_port *info, int event)
 907 {
 908         info->event |= 1 << event; /* remember what kind of event and who */
 909         schedule_work(&info->tqueue);
 910 }                               /* cy_sched_event */
 911
 912 /*
 913  * This routine is used to handle the "bottom half" processing for the
 914  * serial driver, known also the "software interrupt" processing.
 915  * This processing is done at the kernel interrupt level, after the
 916  * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON.  This
 917  * is where time-consuming activities which can not be done in the
 918  * interrupt driver proper are done; the interrupt driver schedules
 919  * them using cy_sched_event(), and they get done here.
 920  *
 921  * This is done through one level of indirection--the task queue.
 922  * When a hardware interrupt service routine wants service by the
 923  * driver's bottom half, it enqueues the appropriate tq_struct (one
 924  * per port) to the keventd work queue and sets a request flag
 925  * that the work queue be processed.
 926  *
 927  * Although this may seem unwieldy, it gives the system a way to
 928  * pass an argument (in this case the pointer to the cyclades_port
 929  * structure) to the bottom half of the driver.  Previous kernels
 930  * had to poll every port to see if that port needed servicing.
 931  */
 932 static void
 933 do_softint(struct work_struct *work)
 934 {
 935         struct cyclades_port *info =
 936                 container_of(work, struct cyclades_port, tqueue);
 937         struct tty_struct    *tty;
 938
 939         tty = info->tty;
 940         if (!tty)
 941                 return;
 942
 943         if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
 944                 tty_hangup(info->tty);
 945                 wake_up_interruptible(&info->open_wait);
 946                         info->flags &= ~ASYNC_NORMAL_ACTIVE;
 947         }
 948         if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event))
 949                 wake_up_interruptible(&info->open_wait);
 950 #ifdef CONFIG_CYZ_INTR
 951         if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event) &&
 952                         !timer_pending(&cyz_rx_full_timer[info->line]))
 953                 mod_timer(&cyz_rx_full_timer[info->line], jiffies + 1);
 954 #endif
 955         if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event))
 956                 wake_up_interruptible(&info->delta_msr_wait);
 957         tty_wakeup(tty);
 958 #ifdef Z_WAKE
 959         if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event))
 960                 complete(&info->shutdown_wait);
 961 #endif
 962 } /* do_softint */
 963
 964
 965 /***********************************************************/
 966 /********* Start of block of Cyclom-Y specific code ********/
 967
 968 /* This routine waits up to 1000 micro-seconds for the previous
 969    command to the Cirrus chip to complete and then issues the
 970    new command.  An error is returned if the previous command
 971    didn't finish within the time limit.
 972
 973    This function is only called from inside spinlock-protected code.
 974  */
 975 static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
 976 {
 977         unsigned int i;
 978
 979         /* Check to see that the previous command has completed */
 980         for (i = 0; i < 100; i++) {
 981                 if (readb(base_addr + (CyCCR << index)) == 0) {
 982                         break;
 983                 }
 984                 udelay(10L);
 985         }
 986         /* if the CCR never cleared, the previous command
 987            didn't finish within the "reasonable time" */
 988         if (i == 100)
 989                 return -1;
 990
 991         /* Issue the new command */
 992         cy_writeb(base_addr + (CyCCR << index), cmd);
 993
 994         return 0;
 995 }                               /* cyy_issue_cmd */
 996
 997 #ifdef CONFIG_ISA
 998 /* ISA interrupt detection code */
 999 static unsigned detect_isa_irq(void __iomem * address)
1000 {
1001         int irq;
1002         unsigned long irqs, flags;
1003         int save_xir, save_car;
1004         int index = 0;          /* IRQ probing is only for ISA */
1005
1006         /* forget possible initially masked and pending IRQ */
1007         irq = probe_irq_off(probe_irq_on());
1008
1009         /* Clear interrupts on the board first */
1010         cy_writeb(address + (Cy_ClrIntr << index), 0);
1011         /* Cy_ClrIntr is 0x1800 */
1012
1013         irqs = probe_irq_on();
1014         /* Wait ... */
1015         udelay(5000L);
1016
1017         /* Enable the Tx interrupts on the CD1400 */
1018         local_irq_save(flags);
1019         cy_writeb(address + (CyCAR << index), 0);
1020         cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
1021
1022         cy_writeb(address + (CyCAR << index), 0);
1023         cy_writeb(address + (CySRER << index),
1024                   readb(address + (CySRER << index)) | CyTxRdy);
1025         local_irq_restore(flags);
1026
1027         /* Wait ... */
1028         udelay(5000L);
1029
1030         /* Check which interrupt is in use */
1031         irq = probe_irq_off(irqs);
1032
1033         /* Clean up */
1034         save_xir = (u_char) readb(address + (CyTIR << index));
1035         save_car = readb(address + (CyCAR << index));
1036         cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
1037         cy_writeb(address + (CySRER << index),
1038                   readb(address + (CySRER << index)) & ~CyTxRdy);
1039         cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
1040         cy_writeb(address + (CyCAR << index), (save_car));
1041         cy_writeb(address + (Cy_ClrIntr << index), 0);
1042         /* Cy_ClrIntr is 0x1800 */
1043
1044         return (irq > 0) ? irq : 0;
1045 }
1046 #endif                          /* CONFIG_ISA */
1047
1048 static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
1049                         void __iomem * base_addr, int status, int index)
1050 {
1051         struct cyclades_port *info;
1052         struct tty_struct *tty;
1053         int char_count;
1054         int j, len, mdm_change, mdm_status, outch;
1055         int save_xir, channel, save_car;
1056         char data;
1057
1058         if (status & CySRReceive) {     /* reception interrupt */
1059 #ifdef CY_DEBUG_INTERRUPTS
1060                 printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
1061 #endif
1062                 /* determine the channel & change to that context */
1063                 spin_lock(&cinfo->card_lock);
1064                 save_xir = (u_char) readb(base_addr + (CyRIR << index));
1065                 channel = (u_short) (save_xir & CyIRChannel);
1066                 info = &cinfo->ports[channel + chip * 4];
1067                 save_car = readb(base_addr + (CyCAR << index));
1068                 cy_writeb(base_addr + (CyCAR << index), save_xir);
1069
1070                 /* if there is nowhere to put the data, discard it */
1071                 if (info->tty == NULL) {
1072                         j = (readb(base_addr + (CyRIVR << index)) &
1073                                 CyIVRMask);
1074                         if (j == CyIVRRxEx) {   /* exception */
1075                                 data = readb(base_addr + (CyRDSR << index));
1076                         } else {        /* normal character reception */
1077                                 char_count = readb(base_addr +
1078                                                 (CyRDCR << index));
1079                                 while (char_count--) {
1080                                         data = readb(base_addr +
1081                                                 (CyRDSR << index));
1082                                 }
1083                         }
1084                 } else {        /* there is an open port for this data */
1085                         tty = info->tty;
1086                         j = (readb(base_addr + (CyRIVR << index)) &
1087                                         CyIVRMask);
1088                         if (j == CyIVRRxEx) {   /* exception */
1089                                 data = readb(base_addr + (CyRDSR << index));
1090
1091                                 /* For statistics only */
1092                                 if (data & CyBREAK)
1093                                         info->icount.brk++;
1094                                 else if (data & CyFRAME)
1095                                         info->icount.frame++;
1096                                 else if (data & CyPARITY)
1097                                         info->icount.parity++;
1098                                 else if (data & CyOVERRUN)
1099                                         info->icount.overrun++;
1100
1101                                 if (data & info->ignore_status_mask) {
1102                                         info->icount.rx++;
1103                                         spin_unlock(&cinfo->card_lock);
1104                                         return;
1105                                 }
1106                                 if (tty_buffer_request_room(tty, 1)) {
1107                                         if (data & info->read_status_mask) {
1108                                                 if (data & CyBREAK) {
1109                                                         tty_insert_flip_char(
1110                                                                 tty,
1111                                                                 readb(
1112                                                                 base_addr +
1113                                                                 (CyRDSR <<
1114                                                                         index)),
1115                                                                 TTY_BREAK);
1116                                                         info->icount.rx++;
1117                                                         if (info->flags &
1118                                                             ASYNC_SAK) {
1119                                                                 do_SAK(tty);
1120                                                         }
1121                                                 } else if (data & CyFRAME) {
1122                                                         tty_insert_flip_char(
1123                                                                 tty,
1124                                                                 readb(
1125                                                                 base_addr +
1126                                                                 (CyRDSR <<
1127                                                                         index)),
1128                                                                 TTY_FRAME);
1129                                                         info->icount.rx++;
1130                                                         info->idle_stats.
1131                                                                 frame_errs++;
1132                                                 } else if (data & CyPARITY) {
1133                                                         /* Pieces of seven... */
1134                                                         tty_insert_flip_char(
1135                                                                 tty,
1136                                                                 readb(
1137                                                                 base_addr +
1138                                                                 (CyRDSR <<
1139                                                                         index)),
1140                                                                 TTY_PARITY);
1141                                                         info->icount.rx++;
1142                                                         info->idle_stats.
1143                                                                 parity_errs++;
1144                                                 } else if (data & CyOVERRUN) {
1145                                                         tty_insert_flip_char(
1146                                                                 tty, 0,
1147                                                                 TTY_OVERRUN);
1148                                                         info->icount.rx++;
1149                                                 /* If the flip buffer itself is
1150                                                    overflowing, we still lose
1151                                                    the next incoming character.
1152                                                  */
1153                                                         tty_insert_flip_char(
1154                                                                 tty,
1155                                                                 readb(
1156                                                                 base_addr +
1157                                                                 (CyRDSR <<
1158                                                                         index)),
1159                                                                 TTY_FRAME);
1160                                                         info->icount.rx++;
1161                                                         info->idle_stats.
1162                                                                 overruns++;
1163                                         /* These two conditions may imply */
1164                                         /* a normal read should be done. */
1165                                         /* }else if(data & CyTIMEOUT){ */
1166                                         /* }else if(data & CySPECHAR){ */
1167                                                 } else {
1168                                                         tty_insert_flip_char(
1169                                                                 tty, 0,
1170                                                                 TTY_NORMAL);
1171                                                         info->icount.rx++;
1172                                                 }
1173                                         } else {
1174                                                 tty_insert_flip_char(tty, 0,
1175                                                                 TTY_NORMAL);
1176                                                 info->icount.rx++;
1177                                         }
1178                                 } else {
1179                                         /* there was a software buffer
1180                                            overrun and nothing could be
1181                                            done about it!!! */
1182                                         info->icount.buf_overrun++;
1183                                         info->idle_stats.overruns++;
1184                                 }
1185                         } else {        /* normal character reception */
1186                                 /* load # chars available from the chip */
1187                                 char_count = readb(base_addr +
1188                                                 (CyRDCR << index));
1189
1190 #ifdef CY_ENABLE_MONITORING
1191                                 ++info->mon.int_count;
1192                                 info->mon.char_count += char_count;
1193                                 if (char_count > info->mon.char_max)
1194                                         info->mon.char_max = char_count;
1195                                 info->mon.char_last = char_count;
1196 #endif
1197                                 len = tty_buffer_request_room(tty, char_count);
1198                                 while (len--) {
1199                                         data = readb(base_addr +
1200                                                         (CyRDSR << index));
1201                                         tty_insert_flip_char(tty, data,
1202                                                         TTY_NORMAL);
1203                                         info->idle_stats.recv_bytes++;
1204                                         info->icount.rx++;
1205 #ifdef CY_16Y_HACK
1206                                         udelay(10L);
1207 #endif
1208                                 }
1209                                 info->idle_stats.recv_idle = jiffies;
1210                         }
1211                         tty_schedule_flip(tty);
1212                 }
1213                 /* end of service */
1214                 cy_writeb(base_addr + (CyRIR << index), (save_xir & 0x3f));
1215                 cy_writeb(base_addr + (CyCAR << index), (save_car));
1216                 spin_unlock(&cinfo->card_lock);
1217         }
1218
1219         if (status & CySRTransmit) {    /* transmission interrupt */
1220                 /* Since we only get here when the transmit buffer
1221                    is empty, we know we can always stuff a dozen
1222                    characters. */
1223 #ifdef CY_DEBUG_INTERRUPTS
1224                 printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
1225 #endif
1226
1227                 /* determine the channel & change to that context */
1228                 spin_lock(&cinfo->card_lock);
1229                 save_xir = (u_char) readb(base_addr + (CyTIR << index));
1230                 channel = (u_short) (save_xir & CyIRChannel);
1231                 save_car = readb(base_addr + (CyCAR << index));
1232                 cy_writeb(base_addr + (CyCAR << index), save_xir);
1233
1234                 /* validate the port# (as configured and open) */
1235                 if (channel + chip * 4 >= cinfo->nports) {
1236                         cy_writeb(base_addr + (CySRER << index),
1237                                   readb(base_addr + (CySRER << index)) &
1238                                   ~CyTxRdy);
1239                         goto txend;
1240                 }
1241                 info = &cinfo->ports[channel + chip * 4];
1242                 if (info->tty == NULL) {
1243                         cy_writeb(base_addr + (CySRER << index),
1244                                   readb(base_addr + (CySRER << index)) &
1245                                   ~CyTxRdy);
1246                         goto txdone;
1247                 }
1248
1249                 /* load the on-chip space for outbound data */
1250                 char_count = info->xmit_fifo_size;
1251
1252                 if (info->x_char) {     /* send special char */
1253                         outch = info->x_char;
1254                         cy_writeb(base_addr + (CyTDR << index), outch);
1255                         char_count--;
1256                         info->icount.tx++;
1257                         info->x_char = 0;
1258                 }
1259
1260                 if (info->breakon || info->breakoff) {
1261                         if (info->breakon) {
1262                                 cy_writeb(base_addr + (CyTDR << index), 0);
1263                                 cy_writeb(base_addr + (CyTDR << index), 0x81);
1264                                 info->breakon = 0;
1265                                 char_count -= 2;
1266                         }
1267                         if (info->breakoff) {
1268                                 cy_writeb(base_addr + (CyTDR << index), 0);
1269                                 cy_writeb(base_addr + (CyTDR << index), 0x83);
1270                                 info->breakoff = 0;
1271                                 char_count -= 2;
1272                         }
1273                 }
1274
1275                 while (char_count-- > 0) {
1276                         if (!info->xmit_cnt) {
1277                                 if (readb(base_addr + (CySRER << index)) &
1278                                                 CyTxMpty) {
1279                                         cy_writeb(base_addr + (CySRER << index),
1280                                                 readb(base_addr +
1281                                                         (CySRER << index)) &
1282                                                 ~CyTxMpty);
1283                                 } else {
1284                                         cy_writeb(base_addr + (CySRER << index),
1285                                                 (readb(base_addr +
1286                                                         (CySRER << index)) &
1287                                                 ~CyTxRdy) | CyTxMpty);
1288                                 }
1289                                 goto txdone;
1290                         }
1291                         if (info->xmit_buf == NULL) {
1292                                 cy_writeb(base_addr + (CySRER << index),
1293                                         readb(base_addr + (CySRER << index)) &
1294                                         ~CyTxRdy);
1295                                 goto txdone;
1296                         }
1297                         if (info->tty->stopped || info->tty->hw_stopped) {
1298                                 cy_writeb(base_addr + (CySRER << index),
1299                                         readb(base_addr + (CySRER << index)) &
1300                                         ~CyTxRdy);
1301                                 goto txdone;
1302                         }
1303                         /* Because the Embedded Transmit Commands have
1304                            been enabled, we must check to see if the
1305                            escape character, NULL, is being sent.  If it
1306                            is, we must ensure that there is room for it
1307                            to be doubled in the output stream.  Therefore
1308                            we no longer advance the pointer when the
1309                            character is fetched, but rather wait until
1310                            after the check for a NULL output character.
1311                            This is necessary because there may not be
1312                            room for the two chars needed to send a NULL.)
1313                          */
1314                         outch = info->xmit_buf[info->xmit_tail];
1315                         if (outch) {
1316                                 info->xmit_cnt--;
1317                                 info->xmit_tail = (info->xmit_tail + 1) &
1318                                                 (SERIAL_XMIT_SIZE - 1);
1319                                 cy_writeb(base_addr + (CyTDR << index), outch);
1320                                 info->icount.tx++;
1321                         } else {
1322                                 if (char_count > 1) {
1323                                         info->xmit_cnt--;
1324                                         info->xmit_tail = (info->xmit_tail + 1)&
1325                                                 (SERIAL_XMIT_SIZE - 1);
1326                                         cy_writeb(base_addr + (CyTDR << index),
1327                                                 outch);
1328                                         cy_writeb(base_addr + (CyTDR << index),
1329                                                 0);
1330                                         info->icount.tx++;
1331                                         char_count--;
1332                                 }
1333                         }
1334                 }
1335
1336 txdone:
1337                 if (info->xmit_cnt < WAKEUP_CHARS) {
1338                         cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1339                 }
1340 txend:
1341                 /* end of service */
1342                 cy_writeb(base_addr + (CyTIR << index), (save_xir & 0x3f));
1343                 cy_writeb(base_addr + (CyCAR << index), (save_car));
1344                 spin_unlock(&cinfo->card_lock);
1345         }
1346
1347         if (status & CySRModem) {       /* modem interrupt */
1348
1349                 /* determine the channel & change to that context */
1350                 spin_lock(&cinfo->card_lock);
1351                 save_xir = (u_char) readb(base_addr + (CyMIR << index));
1352                 channel = (u_short) (save_xir & CyIRChannel);
1353                 info = &cinfo->ports[channel + chip * 4];
1354                 save_car = readb(base_addr + (CyCAR << index));
1355                 cy_writeb(base_addr + (CyCAR << index), save_xir);
1356
1357                 mdm_change = readb(base_addr + (CyMISR << index));
1358                 mdm_status = readb(base_addr + (CyMSVR1 << index));
1359
1360                 if (info->tty) {
1361                         if (mdm_change & CyANY_DELTA) {
1362                                 /* For statistics only */
1363                                 if (mdm_change & CyDCD)
1364                                         info->icount.dcd++;
1365                                 if (mdm_change & CyCTS)
1366                                         info->icount.cts++;
1367                                 if (mdm_change & CyDSR)
1368                                         info->icount.dsr++;
1369                                 if (mdm_change & CyRI)
1370                                         info->icount.rng++;
1371
1372                                 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1373                         }
1374
1375                         if ((mdm_change & CyDCD) &&
1376                                         (info->flags & ASYNC_CHECK_CD)) {
1377                                 if (mdm_status & CyDCD) {
1378                                         cy_sched_event(info,
1379                                                         Cy_EVENT_OPEN_WAKEUP);
1380                                 } else {
1381                                         cy_sched_event(info, Cy_EVENT_HANGUP);
1382                                 }
1383                         }
1384                         if ((mdm_change & CyCTS) &&
1385                                         (info->flags & ASYNC_CTS_FLOW)) {
1386                                 if (info->tty->hw_stopped) {
1387                                         if (mdm_status & CyCTS) {
1388                                                 /* cy_start isn't used
1389                                                    because... !!! */
1390                                                 info->tty->hw_stopped = 0;
1391                                                 cy_writeb(base_addr +
1392                                                         (CySRER << index),
1393                                                         readb(base_addr +
1394                                                                 (CySRER <<
1395                                                                         index))|
1396                                                         CyTxRdy);
1397                                                 cy_sched_event(info,
1398                                                         Cy_EVENT_WRITE_WAKEUP);
1399                                         }
1400                                 } else {
1401                                         if (!(mdm_status & CyCTS)) {
1402                                                 /* cy_stop isn't used
1403                                                    because ... !!! */
1404                                                 info->tty->hw_stopped = 1;
1405                                                 cy_writeb(base_addr +
1406                                                         (CySRER << index),
1407                                                         readb(base_addr +
1408                                                                 (CySRER <<
1409                                                                 index)) &
1410                                                         ~CyTxRdy);
1411                                         }
1412                                 }
1413                         }
1414 /*                      if (mdm_change & CyDSR) {
1415                         }
1416                         if (mdm_change & CyRI) {
1417                         }*/
1418                 }
1419                 /* end of service */
1420                 cy_writeb(base_addr + (CyMIR << index), (save_xir & 0x3f));
1421                 cy_writeb(base_addr + (CyCAR << index), save_car);
1422                 spin_unlock(&cinfo->card_lock);
1423         }
1424 }
1425
1426 /* The real interrupt service routine is called
1427    whenever the card wants its hand held--chars
1428    received, out buffer empty, modem change, etc.
1429  */
1430 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1431 {
1432         int status;
1433         struct cyclades_card *cinfo = dev_id;
1434         void __iomem *base_addr, *card_base_addr;
1435         int chip;
1436         int index;
1437         int too_many;
1438         int had_work;
1439
1440         if (unlikely(cinfo == NULL)) {
1441 #ifdef CY_DEBUG_INTERRUPTS
1442                 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",irq);
1443 #endif
1444                 return IRQ_NONE;        /* spurious interrupt */
1445         }
1446
1447         card_base_addr = cinfo->base_addr;
1448         index = cinfo->bus_index;
1449
1450         /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1451         if (unlikely(card_base_addr == NULL))
1452                 return IRQ_HANDLED;
1453
1454         /* This loop checks all chips in the card.  Make a note whenever
1455            _any_ chip had some work to do, as this is considered an
1456            indication that there will be more to do.  Only when no chip
1457            has any work does this outermost loop exit.
1458          */
1459         do {
1460                 had_work = 0;
1461                 for (chip = 0; chip < cinfo->num_chips; chip++) {
1462                         base_addr = cinfo->base_addr +
1463                                         (cy_chip_offset[chip] << index);
1464                         too_many = 0;
1465                         while ((status = readb(base_addr +
1466                                                 (CySVRR << index))) != 0x00) {
1467                                 had_work++;
1468                         /* The purpose of the following test is to ensure that
1469                            no chip can monopolize the driver.  This forces the
1470                            chips to be checked in a round-robin fashion (after
1471                            draining each of a bunch (1000) of characters).
1472                          */
1473                                 if (1000 < too_many++) {
1474                                         break;
1475                                 }
1476                                 cyy_intr_chip(cinfo, chip, base_addr, status,
1477                                                 index);
1478                         }
1479                 }
1480         } while (had_work);
1481
1482         /* clear interrupts */
1483         spin_lock(&cinfo->card_lock);
1484         cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1485         /* Cy_ClrIntr is 0x1800 */
1486         spin_unlock(&cinfo->card_lock);
1487         return IRQ_HANDLED;
1488 }                               /* cyy_interrupt */
1489
1490 /***********************************************************/
1491 /********* End of block of Cyclom-Y specific code **********/
1492 /******** Start of block of Cyclades-Z specific code *********/
1493 /***********************************************************/
1494
1495 static int
1496 cyz_fetch_msg(struct cyclades_card *cinfo,
1497                 __u32 * channel, __u8 * cmd, __u32 * param)
1498 {
1499         struct FIRM_ID __iomem *firm_id;
1500         struct ZFW_CTRL __iomem *zfw_ctrl;
1501         struct BOARD_CTRL __iomem *board_ctrl;
1502         unsigned long loc_doorbell;
1503
1504         firm_id = cinfo->base_addr + ID_ADDRESS;
1505         if (!ISZLOADED(*cinfo)) {
1506                 return -1;
1507         }
1508         zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1509         board_ctrl = &zfw_ctrl->board_ctrl;
1510
1511         loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
1512                                   (cinfo->ctl_addr))->loc_doorbell);
1513         if (loc_doorbell) {
1514                 *cmd = (char)(0xff & loc_doorbell);
1515                 *channel = readl(&board_ctrl->fwcmd_channel);
1516                 *param = (__u32) readl(&board_ctrl->fwcmd_param);
1517                 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1518                           loc_doorbell, 0xffffffff);
1519                 return 1;
1520         }
1521         return 0;
1522 }                               /* cyz_fetch_msg */
1523
1524 static int
1525 cyz_issue_cmd(struct cyclades_card *cinfo,
1526                 __u32 channel, __u8 cmd, __u32 param)
1527 {
1528         struct FIRM_ID __iomem *firm_id;
1529         struct ZFW_CTRL __iomem *zfw_ctrl;
1530         struct BOARD_CTRL __iomem *board_ctrl;
1531         __u32 __iomem *pci_doorbell;
1532         int index;
1533
1534         firm_id = cinfo->base_addr + ID_ADDRESS;
1535         if (!ISZLOADED(*cinfo)) {
1536                 return -1;
1537         }
1538         zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1539         board_ctrl = &zfw_ctrl->board_ctrl;
1540
1541         index = 0;
1542         pci_doorbell =
1543             &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
1544         while ((readl(pci_doorbell) & 0xff) != 0) {
1545                 if (index++ == 1000) {
1546                         return (int)(readl(pci_doorbell) & 0xff);
1547                 }
1548                 udelay(50L);
1549         }
1550         cy_writel(&board_ctrl->hcmd_channel, channel);
1551         cy_writel(&board_ctrl->hcmd_param, param);
1552         cy_writel(pci_doorbell, (long)cmd);
1553
1554         return 0;
1555 }                               /* cyz_issue_cmd */
1556
1557 static void
1558 cyz_handle_rx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1559                 struct BUF_CTRL __iomem *buf_ctrl)
1560 {
1561         struct cyclades_card *cinfo = info->card;
1562         struct tty_struct *tty = info->tty;
1563         int char_count;
1564         int len;
1565 #ifdef BLOCKMOVE
1566         unsigned char *buf;
1567 #else
1568         char data;
1569 #endif
1570         __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1571
1572         rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1573         rx_put = readl(&buf_ctrl->rx_put);
1574         rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1575         rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
1576         if (rx_put >= rx_get)
1577                 char_count = rx_put - rx_get;
1578         else
1579                 char_count = rx_put - rx_get + rx_bufsize;
1580
1581         if (char_count) {
1582 #ifdef CY_ENABLE_MONITORING
1583                 info->mon.int_count++;
1584                 info->mon.char_count += char_count;
1585                 if (char_count > info->mon.char_max)
1586                         info->mon.char_max = char_count;
1587                 info->mon.char_last = char_count;
1588 #endif
1589                 if (tty == NULL) {
1590                         /* flush received characters */
1591                         new_rx_get = (new_rx_get + char_count) &
1592                                         (rx_bufsize - 1);
1593                         info->rflush_count++;
1594                 } else {
1595 #ifdef BLOCKMOVE
1596                 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1597                    for performance, but because of buffer boundaries, there
1598                    may be several steps to the operation */
1599                         while (1) {
1600                                 len = tty_prepare_flip_string(tty, &buf,
1601                                                 char_count);
1602                                 if (!len)
1603                                         break;
1604
1605                                 len = min_t(unsigned int, min(len, char_count),
1606                                                 rx_bufsize - new_rx_get);
1607
1608                                 memcpy_fromio(buf, cinfo->base_addr +
1609                                                 rx_bufaddr + new_rx_get, len);
1610
1611                                 new_rx_get = (new_rx_get + len) &
1612                                                 (rx_bufsize - 1);
1613                                 char_count -= len;
1614                                 info->icount.rx += len;
1615                                 info->idle_stats.recv_bytes += len;
1616                         }
1617 #else
1618                         len = tty_buffer_request_room(tty, char_count);
1619                         while (len--) {
1620                                 data = readb(cinfo->base_addr + rx_bufaddr +
1621                                                 new_rx_get);
1622                                 new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
1623                                 tty_insert_flip_char(tty, data, TTY_NORMAL);
1624                                 info->idle_stats.recv_bytes++;
1625                                 info->icount.rx++;
1626                         }
1627 #endif
1628 #ifdef CONFIG_CYZ_INTR
1629                 /* Recalculate the number of chars in the RX buffer and issue
1630                    a cmd in case it's higher than the RX high water mark */
1631                         rx_put = readl(&buf_ctrl->rx_put);
1632                         if (rx_put >= rx_get)
1633                                 char_count = rx_put - rx_get;
1634                         else
1635                                 char_count = rx_put - rx_get + rx_bufsize;
1636                         if (char_count >= (int)readl(&buf_ctrl->rx_threshold)) {
1637                                 cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
1638                         }
1639 #endif
1640                         info->idle_stats.recv_idle = jiffies;
1641                         tty_schedule_flip(tty);
1642                 }
1643                 /* Update rx_get */
1644                 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1645         }
1646 }
1647
1648 static void
1649 cyz_handle_tx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1650                 struct BUF_CTRL __iomem *buf_ctrl)
1651 {
1652         struct cyclades_card *cinfo = info->card;
1653         struct tty_struct *tty = info->tty;
1654         char data;
1655         int char_count;
1656 #ifdef BLOCKMOVE
1657         int small_count;
1658 #endif
1659         __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1660
1661         if (info->xmit_cnt <= 0)        /* Nothing to transmit */
1662                 return;
1663
1664         tx_get = readl(&buf_ctrl->tx_get);
1665         tx_put = readl(&buf_ctrl->tx_put);
1666         tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1667         tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
1668         if (tx_put >= tx_get)
1669                 char_count = tx_get - tx_put - 1 + tx_bufsize;
1670         else
1671                 char_count = tx_get - tx_put - 1;
1672
1673         if (char_count) {
1674
1675                 if (tty == NULL)
1676                         goto ztxdone;
1677
1678                 if (info->x_char) {     /* send special char */
1679                         data = info->x_char;
1680
1681                         cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1682                         tx_put = (tx_put + 1) & (tx_bufsize - 1);
1683                         info->x_char = 0;
1684                         char_count--;
1685                         info->icount.tx++;
1686                 }
1687 #ifdef BLOCKMOVE
1688                 while (0 < (small_count = min_t(unsigned int,
1689                                 tx_bufsize - tx_put, min_t(unsigned int,
1690                                         (SERIAL_XMIT_SIZE - info->xmit_tail),
1691                                         min_t(unsigned int, info->xmit_cnt,
1692                                                 char_count))))) {
1693
1694                         memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1695                                         tx_put),
1696                                         &info->xmit_buf[info->xmit_tail],
1697                                         small_count);
1698
1699                         tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1700                         char_count -= small_count;
1701                         info->icount.tx += small_count;
1702                         info->xmit_cnt -= small_count;
1703                         info->xmit_tail = (info->xmit_tail + small_count) &
1704                                         (SERIAL_XMIT_SIZE - 1);
1705                 }
1706 #else
1707                 while (info->xmit_cnt && char_count) {
1708                         data = info->xmit_buf[info->xmit_tail];
1709                         info->xmit_cnt--;
1710                         info->xmit_tail = (info->xmit_tail + 1) &
1711                                         (SERIAL_XMIT_SIZE - 1);
1712
1713                         cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1714                         tx_put = (tx_put + 1) & (tx_bufsize - 1);
1715                         char_count--;
1716                         info->icount.tx++;
1717                 }
1718 #endif
1719 ztxdone:
1720                 if (info->xmit_cnt < WAKEUP_CHARS) {
1721                         cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1722                 }
1723                 /* Update tx_put */
1724                 cy_writel(&buf_ctrl->tx_put, tx_put);
1725         }
1726 }
1727
1728 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1729 {
1730         struct tty_struct *tty;
1731         struct cyclades_port *info;
1732         static struct FIRM_ID __iomem *firm_id;
1733         static struct ZFW_CTRL __iomem *zfw_ctrl;
1734         static struct BOARD_CTRL __iomem *board_ctrl;
1735         static struct CH_CTRL __iomem *ch_ctrl;
1736         static struct BUF_CTRL __iomem *buf_ctrl;
1737         __u32 channel;
1738         __u8 cmd;
1739         __u32 param;
1740         __u32 hw_ver, fw_ver;
1741         int special_count;
1742         int delta_count;
1743
1744         firm_id = cinfo->base_addr + ID_ADDRESS;
1745         zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1746         board_ctrl = &zfw_ctrl->board_ctrl;
1747         fw_ver = readl(&board_ctrl->fw_version);
1748         hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1749                         mail_box_0);
1750
1751         while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1752                 special_count = 0;
1753                 delta_count = 0;
1754                 info = &cinfo->ports[channel];
1755                 if ((tty = info->tty) == NULL)
1756                         continue;
1757
1758                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1759                 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1760
1761                 switch (cmd) {
1762                 case C_CM_PR_ERROR:
1763                         tty_insert_flip_char(tty, 0, TTY_PARITY);
1764                         info->icount.rx++;
1765                         special_count++;
1766                         break;
1767                 case C_CM_FR_ERROR:
1768                         tty_insert_flip_char(tty, 0, TTY_FRAME);
1769                         info->icount.rx++;
1770                         special_count++;
1771                         break;
1772                 case C_CM_RXBRK:
1773                         tty_insert_flip_char(tty, 0, TTY_BREAK);
1774                         info->icount.rx++;
1775                         special_count++;
1776                         break;
1777                 case C_CM_MDCD:
1778                         info->icount.dcd++;
1779                         delta_count++;
1780                         if (info->flags & ASYNC_CHECK_CD) {
1781                                 if ((fw_ver > 241 ? ((u_long) param) :
1782                                                 readl(&ch_ctrl->rs_status)) &
1783                                                 C_RS_DCD) {
1784                                         cy_sched_event(info,
1785                                                         Cy_EVENT_OPEN_WAKEUP);
1786                                 } else {
1787                                         cy_sched_event(info, Cy_EVENT_HANGUP);
1788                                 }
1789                         }
1790                         break;
1791                 case C_CM_MCTS:
1792                         info->icount.cts++;
1793                         delta_count++;
1794                         break;
1795                 case C_CM_MRI:
1796                         info->icount.rng++;
1797                         delta_count++;
1798                         break;
1799                 case C_CM_MDSR:
1800                         info->icount.dsr++;
1801                         delta_count++;
1802                         break;
1803 #ifdef Z_WAKE
1804                 case C_CM_IOCTLW:
1805                         cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
1806                         break;
1807 #endif
1808 #ifdef CONFIG_CYZ_INTR
1809                 case C_CM_RXHIWM:
1810                 case C_CM_RXNNDT:
1811                 case C_CM_INTBACK2:
1812                         /* Reception Interrupt */
1813 #ifdef CY_DEBUG_INTERRUPTS
1814                         printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1815                                         "port %ld\n", info->card, channel);
1816 #endif
1817                         cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1818                         break;
1819                 case C_CM_TXBEMPTY:
1820                 case C_CM_TXLOWWM:
1821                 case C_CM_INTBACK:
1822                         /* Transmission Interrupt */
1823 #ifdef CY_DEBUG_INTERRUPTS
1824                         printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1825                                         "port %ld\n", info->card, channel);
1826 #endif
1827                         cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1828                         break;
1829 #endif                          /* CONFIG_CYZ_INTR */
1830                 case C_CM_FATAL:
1831                         /* should do something with this !!! */
1832                         break;
1833                 default:
1834                         break;
1835                 }
1836                 if (delta_count)
1837                         cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1838                 if (special_count)
1839                         tty_schedule_flip(tty);
1840         }
1841 }
1842
1843 #ifdef CONFIG_CYZ_INTR
1844 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1845 {
1846         struct cyclades_card *cinfo = dev_id;
1847
1848         if (unlikely(cinfo == NULL)) {
1849 #ifdef CY_DEBUG_INTERRUPTS
1850                 printk(KERN_DEBUG "cyz_interrupt: spurious interrupt %d\n",irq);
1851 #endif
1852                 return IRQ_NONE;        /* spurious interrupt */
1853         }
1854
1855         if (unlikely(!ISZLOADED(*cinfo))) {
1856 #ifdef CY_DEBUG_INTERRUPTS
1857                 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1858                                 "(IRQ%d).\n", irq);
1859 #endif
1860                 return IRQ_NONE;
1861         }
1862
1863         /* Handle the interrupts */
1864         cyz_handle_cmd(cinfo);
1865
1866         return IRQ_HANDLED;
1867 }                               /* cyz_interrupt */
1868
1869 static void cyz_rx_restart(unsigned long arg)
1870 {
1871         struct cyclades_port *info = (struct cyclades_port *)arg;
1872         struct cyclades_card *card = info->card;
1873         int retval;
1874         __u32 channel = info->line - card->first_line;
1875         unsigned long flags;
1876
1877         spin_lock_irqsave(&card->card_lock, flags);
1878         retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
1879         if (retval != 0) {
1880                 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1881                         info->line, retval);
1882         }
1883         spin_unlock_irqrestore(&card->card_lock, flags);
1884 }
1885
1886 #else                           /* CONFIG_CYZ_INTR */
1887
1888 static void cyz_poll(unsigned long arg)
1889 {
1890         struct cyclades_card *cinfo;
1891         struct cyclades_port *info;
1892         struct tty_struct *tty;
1893         struct FIRM_ID __iomem *firm_id;
1894         struct ZFW_CTRL __iomem *zfw_ctrl;
1895         struct BOARD_CTRL __iomem *board_ctrl;
1896         struct CH_CTRL __iomem *ch_ctrl;
1897         struct BUF_CTRL __iomem *buf_ctrl;
1898         unsigned long expires = jiffies + HZ;
1899         int card, port;
1900
1901         for (card = 0; card < NR_CARDS; card++) {
1902                 cinfo = &cy_card[card];
1903
1904                 if (!IS_CYC_Z(*cinfo))
1905                         continue;
1906                 if (!ISZLOADED(*cinfo))
1907                         continue;
1908
1909                 firm_id = cinfo->base_addr + ID_ADDRESS;
1910                 zfw_ctrl = cinfo->base_addr +
1911                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1912                 board_ctrl = &(zfw_ctrl->board_ctrl);
1913
1914         /* Skip first polling cycle to avoid racing conditions with the FW */
1915                 if (!cinfo->intr_enabled) {
1916                         cinfo->nports = (int)readl(&board_ctrl->n_channel);
1917                         cinfo->intr_enabled = 1;
1918                         continue;
1919                 }
1920
1921                 cyz_handle_cmd(cinfo);
1922
1923                 for (port = 0; port < cinfo->nports; port++) {
1924                         info = &cinfo->ports[port];
1925                         tty = info->tty;
1926                         ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1927                         buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1928
1929                         if (!info->throttle)
1930                                 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1931                         cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1932                 }
1933                 /* poll every 'cyz_polling_cycle' period */
1934                 expires = jiffies + cyz_polling_cycle;
1935         }
1936         mod_timer(&cyz_timerlist, expires);
1937 }                               /* cyz_poll */
1938
1939 #endif                          /* CONFIG_CYZ_INTR */
1940
1941 /********** End of block of Cyclades-Z specific code *********/
1942 /***********************************************************/
1943
1944 /* This is called whenever a port becomes active;
1945    interrupts are enabled and DTR & RTS are turned on.
1946  */
1947 static int startup(struct cyclades_port *info)
1948 {
1949         struct cyclades_card *card;
1950         unsigned long flags;
1951         int retval = 0;
1952         void __iomem *base_addr;
1953         int chip, channel, index;
1954         unsigned long page;
1955
1956         card = info->card;
1957         channel = info->line - card->first_line;
1958
1959         page = get_zeroed_page(GFP_KERNEL);
1960         if (!page)
1961                 return -ENOMEM;
1962
1963         spin_lock_irqsave(&card->card_lock, flags);
1964
1965         if (info->flags & ASYNC_INITIALIZED) {
1966                 free_page(page);
1967                 goto errout;
1968         }
1969
1970         if (!info->type) {
1971                 if (info->tty) {
1972                         set_bit(TTY_IO_ERROR, &info->tty->flags);
1973                 }
1974                 free_page(page);
1975                 goto errout;
1976         }
1977
1978         if (info->xmit_buf)
1979                 free_page(page);
1980         else
1981                 info->xmit_buf = (unsigned char *)page;
1982
1983         spin_unlock_irqrestore(&card->card_lock, flags);
1984
1985         set_line_char(info);
1986
1987         if (!IS_CYC_Z(*card)) {
1988                 chip = channel >> 2;
1989                 channel &= 0x03;
1990                 index = card->bus_index;
1991                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
1992
1993 #ifdef CY_DEBUG_OPEN
1994                 printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
1995                                 "base_addr %p\n",
1996                                 card, chip, channel, base_addr);
1997 #endif
1998                 spin_lock_irqsave(&card->card_lock, flags);
1999
2000                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2001
2002                 cy_writeb(base_addr + (CyRTPR << index),
2003                         (info->default_timeout ? info->default_timeout : 0x02));
2004                 /* 10ms rx timeout */
2005
2006                 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
2007                                 index);
2008
2009                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2010                 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
2011                 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
2012
2013 #ifdef CY_DEBUG_DTR
2014                 printk(KERN_DEBUG "cyc:startup raising DTR\n");
2015                 printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
2016                         readb(base_addr + (CyMSVR1 << index)),
2017                         readb(base_addr + (CyMSVR2 << index)));
2018 #endif
2019
2020                 cy_writeb(base_addr + (CySRER << index),
2021                         readb(base_addr + (CySRER << index)) | CyRxData);
2022                 info->flags |= ASYNC_INITIALIZED;
2023
2024                 if (info->tty) {
2025                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
2026                 }
2027                 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2028                 info->breakon = info->breakoff = 0;
2029                 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2030                 info->idle_stats.in_use =
2031                 info->idle_stats.recv_idle =
2032                 info->idle_stats.xmit_idle = jiffies;
2033
2034                 spin_unlock_irqrestore(&card->card_lock, flags);
2035
2036         } else {
2037                 struct FIRM_ID __iomem *firm_id;
2038                 struct ZFW_CTRL __iomem *zfw_ctrl;
2039                 struct BOARD_CTRL __iomem *board_ctrl;
2040                 struct CH_CTRL __iomem *ch_ctrl;
2041
2042                 base_addr = card->base_addr;
2043
2044                 firm_id = base_addr + ID_ADDRESS;
2045                 if (!ISZLOADED(*card)) {
2046                         return -ENODEV;
2047                 }
2048
2049                 zfw_ctrl = card->base_addr +
2050                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2051                 board_ctrl = &zfw_ctrl->board_ctrl;
2052                 ch_ctrl = zfw_ctrl->ch_ctrl;
2053
2054 #ifdef CY_DEBUG_OPEN
2055                 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
2056                         "base_addr %p\n", card, channel, base_addr);
2057 #endif
2058                 spin_lock_irqsave(&card->card_lock, flags);
2059
2060                 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
2061 #ifdef Z_WAKE
2062 #ifdef CONFIG_CYZ_INTR
2063                 cy_writel(&ch_ctrl[channel].intr_enable,
2064                           C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2065                           C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
2066 #else
2067                 cy_writel(&ch_ctrl[channel].intr_enable,
2068                           C_IN_IOCTLW | C_IN_MDCD);
2069 #endif                          /* CONFIG_CYZ_INTR */
2070 #else
2071 #ifdef CONFIG_CYZ_INTR
2072                 cy_writel(&ch_ctrl[channel].intr_enable,
2073                           C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2074                           C_IN_RXNNDT | C_IN_MDCD);
2075 #else
2076                 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
2077 #endif                          /* CONFIG_CYZ_INTR */
2078 #endif                          /* Z_WAKE */
2079
2080                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
2081                 if (retval != 0) {
2082                         printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
2083                                 "%x\n", info->line, retval);
2084                 }
2085
2086                 /* Flush RX buffers before raising DTR and RTS */
2087                 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
2088                 if (retval != 0) {
2089                         printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
2090                                 "%x\n", info->line, retval);
2091                 }
2092
2093                 /* set timeout !!! */
2094                 /* set RTS and DTR !!! */
2095                 cy_writel(&ch_ctrl[channel].rs_control,
2096                         readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
2097                         C_RS_DTR);
2098                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
2099                 if (retval != 0) {
2100                         printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
2101                                 "%x\n", info->line, retval);
2102                 }
2103 #ifdef CY_DEBUG_DTR
2104                 printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
2105 #endif
2106
2107                 /* enable send, recv, modem !!! */
2108
2109                 info->flags |= ASYNC_INITIALIZED;
2110                 if (info->tty) {
2111                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
2112                 }
2113                 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2114                 info->breakon = info->breakoff = 0;
2115                 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2116                 info->idle_stats.in_use =
2117                 info->idle_stats.recv_idle =
2118                 info->idle_stats.xmit_idle = jiffies;
2119
2120                 spin_unlock_irqrestore(&card->card_lock, flags);
2121         }
2122
2123 #ifdef CY_DEBUG_OPEN
2124         printk(KERN_DEBUG "cyc startup done\n");
2125 #endif
2126         return 0;
2127
2128 errout:
2129         spin_unlock_irqrestore(&card->card_lock, flags);
2130         return retval;
2131 }                               /* startup */
2132
2133 static void start_xmit(struct cyclades_port *info)
2134 {
2135         struct cyclades_card *card;
2136         unsigned long flags;
2137         void __iomem *base_addr;
2138         int chip, channel, index;
2139
2140         card = info->card;
2141         channel = info->line - card->first_line;
2142         if (!IS_CYC_Z(*card)) {
2143                 chip = channel >> 2;
2144                 channel &= 0x03;
2145                 index = card->bus_index;
2146                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2147
2148                 spin_lock_irqsave(&card->card_lock, flags);
2149                 cy_writeb(base_addr + (CyCAR << index), channel);
2150                 cy_writeb(base_addr + (CySRER << index),
2151                         readb(base_addr + (CySRER << index)) | CyTxRdy);
2152                 spin_unlock_irqrestore(&card->card_lock, flags);
2153         } else {
2154 #ifdef CONFIG_CYZ_INTR
2155                 int retval;
2156
2157                 spin_lock_irqsave(&card->card_lock, flags);
2158                 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
2159                 if (retval != 0) {
2160                         printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
2161                                 "%x\n", info->line, retval);
2162                 }
2163                 spin_unlock_irqrestore(&card->card_lock, flags);
2164 #else                           /* CONFIG_CYZ_INTR */
2165                 /* Don't have to do anything at this time */
2166 #endif                          /* CONFIG_CYZ_INTR */
2167         }
2168 }                               /* start_xmit */
2169
2170 /*
2171  * This routine shuts down a serial port; interrupts are disabled,
2172  * and DTR is dropped if the hangup on close termio flag is on.
2173  */
2174 static void shutdown(struct cyclades_port *info)
2175 {
2176         struct cyclades_card *card;
2177         unsigned long flags;
2178         void __iomem *base_addr;
2179         int chip, channel, index;
2180
2181         if (!(info->flags & ASYNC_INITIALIZED)) {
2182                 return;
2183         }
2184
2185         card = info->card;
2186         channel = info->line - card->first_line;
2187         if (!IS_CYC_Z(*card)) {
2188                 chip = channel >> 2;
2189                 channel &= 0x03;
2190                 index = card->bus_index;
2191                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2192
2193 #ifdef CY_DEBUG_OPEN
2194                 printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
2195                                 "channel %d, base_addr %p\n",
2196                                 card, chip, channel, base_addr);
2197 #endif
2198
2199                 spin_lock_irqsave(&card->card_lock, flags);
2200
2201                 /* Clear delta_msr_wait queue to avoid mem leaks. */
2202                 wake_up_interruptible(&info->delta_msr_wait);
2203
2204                 if (info->xmit_buf) {
2205                         unsigned char *temp;
2206                         temp = info->xmit_buf;
2207                         info->xmit_buf = NULL;
2208                         free_page((unsigned long)temp);
2209                 }
2210                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2211                 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2212                         cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2213                         cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2214 #ifdef CY_DEBUG_DTR
2215                         printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
2216                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
2217                                 readb(base_addr + (CyMSVR1 << index)),
2218                                 readb(base_addr + (CyMSVR2 << index)));
2219 #endif
2220                 }
2221                 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2222                 /* it may be appropriate to clear _XMIT at
2223                    some later date (after testing)!!! */
2224
2225                 if (info->tty) {
2226                         set_bit(TTY_IO_ERROR, &info->tty->flags);
2227                 }
2228                 info->flags &= ~ASYNC_INITIALIZED;
2229                 spin_unlock_irqrestore(&card->card_lock, flags);
2230         } else {
2231                 struct FIRM_ID __iomem *firm_id;
2232                 struct ZFW_CTRL __iomem *zfw_ctrl;
2233                 struct BOARD_CTRL __iomem *board_ctrl;
2234                 struct CH_CTRL __iomem *ch_ctrl;
2235                 int retval;
2236
2237                 base_addr = card->base_addr;
2238 #ifdef CY_DEBUG_OPEN
2239                 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
2240                         "base_addr %p\n", card, channel, base_addr);
2241 #endif
2242
2243                 firm_id = base_addr + ID_ADDRESS;
2244                 if (!ISZLOADED(*card)) {
2245                         return;
2246                 }
2247
2248                 zfw_ctrl = card->base_addr +
2249                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2250                 board_ctrl = &zfw_ctrl->board_ctrl;
2251                 ch_ctrl = zfw_ctrl->ch_ctrl;
2252
2253                 spin_lock_irqsave(&card->card_lock, flags);
2254
2255                 if (info->xmit_buf) {
2256                         unsigned char *temp;
2257                         temp = info->xmit_buf;
2258                         info->xmit_buf = NULL;
2259                         free_page((unsigned long)temp);
2260                 }
2261
2262                 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2263                         cy_writel(&ch_ctrl[channel].rs_control,
2264                                 (__u32)(readl(&ch_ctrl[channel].rs_control) &
2265                                         ~(C_RS_RTS | C_RS_DTR)));
2266                         retval = cyz_issue_cmd(info->card, channel,
2267                                         C_CM_IOCTLM, 0L);
2268                         if (retval != 0) {
2269                                 printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
2270                                         "was %x\n", info->line, retval);
2271                         }
2272 #ifdef CY_DEBUG_DTR
2273                         printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
2274 #endif
2275                 }
2276
2277                 if (info->tty) {
2278                         set_bit(TTY_IO_ERROR, &info->tty->flags);
2279                 }
2280                 info->flags &= ~ASYNC_INITIALIZED;
2281
2282                 spin_unlock_irqrestore(&card->card_lock, flags);
2283         }
2284
2285 #ifdef CY_DEBUG_OPEN
2286         printk(KERN_DEBUG "cyc shutdown done\n");
2287 #endif
2288 }                               /* shutdown */
2289
2290 /*
2291  * ------------------------------------------------------------
2292  * cy_open() and friends
2293  * ------------------------------------------------------------
2294  */
2295
2296 static int
2297 block_til_ready(struct tty_struct *tty, struct file *filp,
2298                 struct cyclades_port *info)
2299 {
2300         DECLARE_WAITQUEUE(wait, current);
2301         struct cyclades_card *cinfo;
2302         unsigned long flags;
2303         int chip, channel, index;
2304         int retval;
2305         void __iomem *base_addr;
2306
2307         cinfo = info->card;
2308         channel = info->line - cinfo->first_line;
2309
2310         /*
2311          * If the device is in the middle of being closed, then block
2312          * until it's done, and then try again.
2313          */
2314         if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2315                 wait_event_interruptible(info->close_wait,
2316                                 !(info->flags & ASYNC_CLOSING));
2317                 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2318         }
2319
2320         /*
2321          * If non-blocking mode is set, then make the check up front
2322          * and then exit.
2323          */
2324         if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2325                 info->flags |= ASYNC_NORMAL_ACTIVE;
2326                 return 0;
2327         }
2328
2329         /*
2330          * Block waiting for the carrier detect and the line to become
2331          * free (i.e., not in use by the callout).  While we are in
2332          * this loop, info->count is dropped by one, so that
2333          * cy_close() knows when to free things.  We restore it upon
2334          * exit, either normal or abnormal.
2335          */
2336         retval = 0;
2337         add_wait_queue(&info->open_wait, &wait);
2338 #ifdef CY_DEBUG_OPEN
2339         printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
2340                 "count = %d\n", info->line, info->count);
2341 #endif
2342         spin_lock_irqsave(&cinfo->card_lock, flags);
2343         if (!tty_hung_up_p(filp))
2344                 info->count--;
2345         spin_unlock_irqrestore(&cinfo->card_lock, flags);
2346 #ifdef CY_DEBUG_COUNT
2347         printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
2348                 "%d\n", current->pid, info->count);
2349 #endif
2350         info->blocked_open++;
2351
2352         if (!IS_CYC_Z(*cinfo)) {
2353                 chip = channel >> 2;
2354                 channel &= 0x03;
2355                 index = cinfo->bus_index;
2356                 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2357
2358                 while (1) {
2359                         spin_lock_irqsave(&cinfo->card_lock, flags);
2360                         if ((tty->termios->c_cflag & CBAUD)) {
2361                                 cy_writeb(base_addr + (CyCAR << index),
2362                                           (u_char) channel);
2363                                 cy_writeb(base_addr + (CyMSVR1 << index),
2364                                           CyRTS);
2365                                 cy_writeb(base_addr + (CyMSVR2 << index),
2366                                           CyDTR);
2367 #ifdef CY_DEBUG_DTR
2368                                 printk(KERN_DEBUG "cyc:block_til_ready raising "
2369                                         "DTR\n");
2370                                 printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
2371                                         readb(base_addr + (CyMSVR1 << index)),
2372                                         readb(base_addr + (CyMSVR2 << index)));
2373 #endif
2374                         }
2375                         spin_unlock_irqrestore(&cinfo->card_lock, flags);
2376
2377                         set_current_state(TASK_INTERRUPTIBLE);
2378                         if (tty_hung_up_p(filp) ||
2379                                         !(info->flags & ASYNC_INITIALIZED)) {
2380                                 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2381                                           -EAGAIN : -ERESTARTSYS);
2382                                 break;
2383                         }
2384
2385                         spin_lock_irqsave(&cinfo->card_lock, flags);
2386                         cy_writeb(base_addr + (CyCAR << index),
2387                                   (u_char) channel);
2388                         if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2389                                         (readb(base_addr +
2390                                                 (CyMSVR1 << index)) & CyDCD))) {
2391                                 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2392                                 break;
2393                         }
2394                         spin_unlock_irqrestore(&cinfo->card_lock, flags);
2395
2396                         if (signal_pending(current)) {
2397                                 retval = -ERESTARTSYS;
2398                                 break;
2399                         }
2400 #ifdef CY_DEBUG_OPEN
2401                         printk(KERN_DEBUG "cyc block_til_ready blocking: "
2402                                 "ttyC%d, count = %d\n",
2403                                 info->line, info->count);
2404 #endif
2405                         schedule();
2406                 }
2407         } else {
2408                 struct FIRM_ID __iomem *firm_id;
2409                 struct ZFW_CTRL __iomem *zfw_ctrl;
2410                 struct BOARD_CTRL __iomem *board_ctrl;
2411                 struct CH_CTRL __iomem *ch_ctrl;
2412
2413                 base_addr = cinfo->base_addr;
2414                 firm_id = base_addr + ID_ADDRESS;
2415                 if (!ISZLOADED(*cinfo)) {
2416                         __set_current_state(TASK_RUNNING);
2417                         remove_wait_queue(&info->open_wait, &wait);
2418                         return -EINVAL;
2419                 }
2420
2421                 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)& 0xfffff);
2422                 board_ctrl = &zfw_ctrl->board_ctrl;
2423                 ch_ctrl = zfw_ctrl->ch_ctrl;
2424
2425                 while (1) {
2426                         if ((tty->termios->c_cflag & CBAUD)) {
2427                                 cy_writel(&ch_ctrl[channel].rs_control,
2428                                         readl(&ch_ctrl[channel].rs_control) |
2429                                         C_RS_RTS | C_RS_DTR);
2430                                 retval = cyz_issue_cmd(cinfo,
2431                                         channel, C_CM_IOCTLM, 0L);
2432                                 if (retval != 0) {
2433                                         printk(KERN_ERR "cyc:block_til_ready "
2434                                                 "retval on ttyC%d was %x\n",
2435                                                 info->line, retval);
2436                                 }
2437 #ifdef CY_DEBUG_DTR
2438                                 printk(KERN_DEBUG "cyc:block_til_ready raising "
2439                                         "Z DTR\n");
2440 #endif
2441                         }
2442
2443                         set_current_state(TASK_INTERRUPTIBLE);
2444                         if (tty_hung_up_p(filp) ||
2445                                         !(info->flags & ASYNC_INITIALIZED)) {
2446                                 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2447                                           -EAGAIN : -ERESTARTSYS);
2448                                 break;
2449                         }
2450                         if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2451                                         (readl(&ch_ctrl[channel].rs_status) &
2452                                                 C_RS_DCD))) {
2453                                 break;
2454                         }
2455                         if (signal_pending(current)) {
2456                                 retval = -ERESTARTSYS;
2457                                 break;
2458                         }
2459 #ifdef CY_DEBUG_OPEN
2460                         printk(KERN_DEBUG "cyc block_til_ready blocking: "
2461                                 "ttyC%d, count = %d\n",
2462                                 info->line, info->count);
2463 #endif
2464                         schedule();
2465                 }
2466         }
2467         __set_current_state(TASK_RUNNING);
2468         remove_wait_queue(&info->open_wait, &wait);
2469         if (!tty_hung_up_p(filp)) {
2470                 info->count++;
2471 #ifdef CY_DEBUG_COUNT
2472                 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
2473                         "count to %d\n", current->pid, info->count);
2474 #endif
2475         }
2476         info->blocked_open--;
2477 #ifdef CY_DEBUG_OPEN
2478         printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
2479                 "count = %d\n", info->line, info->count);
2480 #endif
2481         if (retval)
2482                 return retval;
2483         info->flags |= ASYNC_NORMAL_ACTIVE;
2484         return 0;
2485 }                               /* block_til_ready */
2486
2487 /*
2488  * This routine is called whenever a serial port is opened.  It
2489  * performs the serial-specific initialization for the tty structure.
2490  */
2491 static int cy_open(struct tty_struct *tty, struct file *filp)
2492 {
2493         struct cyclades_port *info;
2494         unsigned int i;
2495         int retval, line;
2496
2497         line = tty->index;
2498         if ((line < 0) || (NR_PORTS <= line)) {
2499                 return -ENODEV;
2500         }
2501         for (i = 0; i < NR_CARDS; i++)
2502                 if (line < cy_card[i].first_line + cy_card[i].nports &&
2503                                 line >= cy_card[i].first_line)
2504                         break;
2505         if (i >= NR_CARDS)
2506                 return -ENODEV;
2507         info = &cy_card[i].ports[line - cy_card[i].first_line];
2508         if (info->line < 0) {
2509                 return -ENODEV;
2510         }
2511
2512         /* If the card's firmware hasn't been loaded,
2513            treat it as absent from the system.  This
2514            will make the user pay attention.
2515          */
2516         if (IS_CYC_Z(*info->card)) {
2517                 struct cyclades_card *cinfo = info->card;
2518                 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2519
2520                 if (!ISZLOADED(*cinfo)) {
2521                         if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
2522                                          (cinfo->ctl_addr))->mail_box_0)) &&
2523                                         Z_FPGA_CHECK(*cinfo)) &&
2524                                         (ZFIRM_HLT == readl(
2525                                                 &firm_id->signature))) {
2526                                 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
2527                                         "need an external power supply for "
2528                                         "this number of ports.\nFirmware "
2529                                         "halted.\n");
2530                         } else {
2531                                 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2532                                         "yet loaded\n");
2533                         }
2534                         return -ENODEV;
2535                 }
2536 #ifdef CONFIG_CYZ_INTR
2537                 else {
2538                 /* In case this Z board is operating in interrupt mode, its
2539                    interrupts should be enabled as soon as the first open
2540                    happens to one of its ports. */
2541                         if (!cinfo->intr_enabled) {
2542                                 struct ZFW_CTRL __iomem *zfw_ctrl;
2543                                 struct BOARD_CTRL __iomem *board_ctrl;
2544
2545                                 zfw_ctrl = cinfo->base_addr +
2546                                         (readl(&firm_id->zfwctrl_addr) &
2547                                          0xfffff);
2548
2549                                 board_ctrl = &zfw_ctrl->board_ctrl;
2550
2551                                 /* Enable interrupts on the PLX chip */
2552                                 cy_writew(cinfo->ctl_addr + 0x68,
2553                                         readw(cinfo->ctl_addr + 0x68) | 0x0900);
2554                                 /* Enable interrupts on the FW */
2555                                 retval = cyz_issue_cmd(cinfo, 0,
2556                                                 C_CM_IRQ_ENBL, 0L);
2557                                 if (retval != 0) {
2558                                         printk(KERN_ERR "cyc:IRQ enable retval "
2559                                                 "was %x\n", retval);
2560                                 }
2561                                 cinfo->nports =
2562                                         (int)readl(&board_ctrl->n_channel);
2563                                 cinfo->intr_enabled = 1;
2564                         }
2565                 }
2566 #endif                          /* CONFIG_CYZ_INTR */
2567                 /* Make sure this Z port really exists in hardware */
2568                 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2569                         return -ENODEV;
2570         }
2571 #ifdef CY_DEBUG_OTHER
2572         printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
2573 #endif
2574         tty->driver_data = info;
2575         info->tty = tty;
2576         if (serial_paranoia_check(info, tty->name, "cy_open")) {
2577                 return -ENODEV;
2578         }
2579 #ifdef CY_DEBUG_OPEN
2580         printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
2581                         info->count);
2582 #endif
2583         info->count++;
2584 #ifdef CY_DEBUG_COUNT
2585         printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
2586                 current->pid, info->count);
2587 #endif
2588
2589         /*
2590          * If the port is the middle of closing, bail out now
2591          */
2592         if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2593                 wait_event_interruptible(info->close_wait,
2594                                 !(info->flags & ASYNC_CLOSING));
2595                 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2596         }
2597
2598         /*
2599          * Start up serial port
2600          */
2601         retval = startup(info);
2602         if (retval) {
2603                 return retval;
2604         }
2605
2606         retval = block_til_ready(tty, filp, info);
2607         if (retval) {
2608 #ifdef CY_DEBUG_OPEN
2609                 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2610                         "with %d\n", retval);
2611 #endif
2612                 return retval;
2613         }
2614
2615         info->throttle = 0;
2616
2617 #ifdef CY_DEBUG_OPEN
2618         printk(KERN_DEBUG "cyc:cy_open done\n");
2619 #endif
2620         return 0;
2621 }                               /* cy_open */
2622
2623 /*
2624  * cy_wait_until_sent() --- wait until the transmitter is empty
2625  */
2626 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2627 {
2628         struct cyclades_card *card;
2629         struct cyclades_port *info = tty->driver_data;
2630         void __iomem *base_addr;
2631         int chip, channel, index;
2632         unsigned long orig_jiffies;
2633         int char_time;
2634
2635         if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2636                 return;
2637
2638         if (info->xmit_fifo_size == 0)
2639                 return;         /* Just in case.... */
2640
2641         orig_jiffies = jiffies;
2642         /*
2643          * Set the check interval to be 1/5 of the estimated time to
2644          * send a single character, and make it at least 1.  The check
2645          * interval should also be less than the timeout.
2646          *
2647          * Note: we have to use pretty tight timings here to satisfy
2648          * the NIST-PCTS.
2649          */
2650         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2651         char_time = char_time / 5;
2652         if (char_time <= 0)
2653                 char_time = 1;
2654         if (timeout < 0)
2655                 timeout = 0;
2656         if (timeout)
2657                 char_time = min(char_time, timeout);
2658         /*
2659          * If the transmitter hasn't cleared in twice the approximate
2660          * amount of time to send the entire FIFO, it probably won't
2661          * ever clear.  This assumes the UART isn't doing flow
2662          * control, which is currently the case.  Hence, if it ever
2663          * takes longer than info->timeout, this is probably due to a
2664          * UART bug of some kind.  So, we clamp the timeout parameter at
2665          * 2*info->timeout.
2666          */
2667         if (!timeout || timeout > 2 * info->timeout)
2668                 timeout = 2 * info->timeout;
2669 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2670         printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2671                 timeout, char_time, jiffies);
2672 #endif
2673         card = info->card;
2674         channel = (info->line) - (card->first_line);
2675         if (!IS_CYC_Z(*card)) {
2676                 chip = channel >> 2;
2677                 channel &= 0x03;
2678                 index = card->bus_index;
2679                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2680                 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
2681 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2682                         printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
2683 #endif
2684                         if (msleep_interruptible(jiffies_to_msecs(char_time)))
2685                                 break;
2686                         if (timeout && time_after(jiffies, orig_jiffies +
2687                                         timeout))
2688                                 break;
2689                 }
2690         }
2691         /* Run one more char cycle */
2692         msleep_interruptible(jiffies_to_msecs(char_time * 5));
2693 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2694         printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
2695 #endif
2696 }
2697
2698 /*
2699  * This routine is called when a particular tty device is closed.
2700  */
2701 static void cy_close(struct tty_struct *tty, struct file *filp)
2702 {
2703         struct cyclades_port *info = tty->driver_data;
2704         struct cyclades_card *card;
2705         unsigned long flags;
2706
2707 #ifdef CY_DEBUG_OTHER
2708         printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
2709 #endif
2710
2711         if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
2712                 return;
2713         }
2714
2715         card = info->card;
2716
2717         spin_lock_irqsave(&card->card_lock, flags);
2718         /* If the TTY is being hung up, nothing to do */
2719         if (tty_hung_up_p(filp)) {
2720                 spin_unlock_irqrestore(&card->card_lock, flags);
2721                 return;
2722         }
2723 #ifdef CY_DEBUG_OPEN
2724         printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
2725                 info->count);
2726 #endif
2727         if ((tty->count == 1) && (info->count != 1)) {
2728                 /*
2729                  * Uh, oh.  tty->count is 1, which means that the tty
2730                  * structure will be freed.  Info->count should always
2731                  * be one in these conditions.  If it's greater than
2732                  * one, we've got real problems, since it means the
2733                  * serial port won't be shutdown.
2734                  */
2735                 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
2736                         "tty->count is 1, info->count is %d\n", info->count);
2737                 info->count = 1;
2738         }
2739 #ifdef CY_DEBUG_COUNT
2740         printk(KERN_DEBUG  "cyc:cy_close at (%d): decrementing count to %d\n",
2741                 current->pid, info->count - 1);
2742 #endif
2743         if (--info->count < 0) {
2744 #ifdef CY_DEBUG_COUNT
2745                 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
2746 #endif
2747                 info->count = 0;
2748         }
2749         if (info->count) {
2750                 spin_unlock_irqrestore(&card->card_lock, flags);
2751                 return;
2752         }
2753         info->flags |= ASYNC_CLOSING;
2754
2755         /*
2756          * Now we wait for the transmit buffer to clear; and we notify
2757          * the line discipline to only process XON/XOFF characters.
2758          */
2759         tty->closing = 1;
2760         spin_unlock_irqrestore(&card->card_lock, flags);
2761         if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2762                 tty_wait_until_sent(tty, info->closing_wait);
2763         }
2764         spin_lock_irqsave(&card->card_lock, flags);
2765
2766         if (!IS_CYC_Z(*card)) {
2767                 int channel = info->line - card->first_line;
2768                 int index = card->bus_index;
2769                 void __iomem *base_addr = card->base_addr +
2770                         (cy_chip_offset[channel >> 2] << index);
2771                 /* Stop accepting input */
2772                 channel &= 0x03;
2773                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2774                 cy_writeb(base_addr + (CySRER << index),
2775                           readb(base_addr + (CySRER << index)) & ~CyRxData);
2776                 if (info->flags & ASYNC_INITIALIZED) {
2777                         /* Waiting for on-board buffers to be empty before closing
2778                            the port */
2779                         spin_unlock_irqrestore(&card->card_lock, flags);
2780                         cy_wait_until_sent(tty, info->timeout);
2781                         spin_lock_irqsave(&card->card_lock, flags);
2782                 }
2783         } else {
2784 #ifdef Z_WAKE
2785                 /* Waiting for on-board buffers to be empty before closing the port */
2786                 void __iomem *base_addr = card->base_addr;
2787                 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2788                 struct ZFW_CTRL __iomem *zfw_ctrl =
2789                     base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2790                 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2791                 int channel = info->line - card->first_line;
2792                 int retval;
2793
2794                 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2795                         retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
2796                         if (retval != 0) {
2797                                 printk(KERN_DEBUG "cyc:cy_close retval on "
2798                                         "ttyC%d was %x\n", info->line, retval);
2799                         }
2800                         spin_unlock_irqrestore(&card->card_lock, flags);
2801                         wait_for_completion_interruptible(&info->shutdown_wait);
2802                         spin_lock_irqsave(&card->card_lock, flags);
2803                 }
2804 #endif
2805         }
2806
2807         spin_unlock_irqrestore(&card->card_lock, flags);
2808         shutdown(info);
2809         if (tty->driver->flush_buffer)
2810                 tty->driver->flush_buffer(tty);
2811         tty_ldisc_flush(tty);
2812         spin_lock_irqsave(&card->card_lock, flags);
2813
2814         tty->closing = 0;
2815         info->event = 0;
2816         info->tty = NULL;
2817         if (info->blocked_open) {
2818                 spin_unlock_irqrestore(&card->card_lock, flags);
2819                 if (info->close_delay) {
2820                         msleep_interruptible(jiffies_to_msecs
2821                                                 (info->close_delay));
2822                 }
2823                 wake_up_interruptible(&info->open_wait);
2824                 spin_lock_irqsave(&card->card_lock, flags);
2825         }
2826         info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2827         wake_up_interruptible(&info->close_wait);
2828
2829 #ifdef CY_DEBUG_OTHER
2830         printk(KERN_DEBUG "cyc:cy_close done\n");
2831 #endif
2832
2833         spin_unlock_irqrestore(&card->card_lock, flags);
2834 }                               /* cy_close */
2835
2836 /* This routine gets called when tty_write has put something into
2837  * the write_queue.  The characters may come from user space or
2838  * kernel space.
2839  *
2840  * This routine will return the number of characters actually
2841  * accepted for writing.
2842  *
2843  * If the port is not already transmitting stuff, start it off by
2844  * enabling interrupts.  The interrupt service routine will then
2845  * ensure that the characters are sent.
2846  * If the port is already active, there is no need to kick it.
2847  *
2848  */
2849 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2850 {
2851         struct cyclades_port *info = tty->driver_data;
2852         unsigned long flags;
2853         int c, ret = 0;
2854
2855 #ifdef CY_DEBUG_IO
2856         printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
2857 #endif
2858
2859         if (serial_paranoia_check(info, tty->name, "cy_write")) {
2860                 return 0;
2861         }
2862
2863         if (!info->xmit_buf)
2864                 return 0;
2865
2866         spin_lock_irqsave(&info->card->card_lock, flags);
2867         while (1) {
2868                 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2869                                    (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2870
2871                 if (c <= 0)
2872                         break;
2873
2874                 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2875                 info->xmit_head = (info->xmit_head + c) &
2876                         (SERIAL_XMIT_SIZE - 1);
2877                 info->xmit_cnt += c;
2878                 buf += c;
2879                 count -= c;
2880                 ret += c;
2881         }
2882         spin_unlock_irqrestore(&info->card->card_lock, flags);
2883
2884         info->idle_stats.xmit_bytes += ret;
2885         info->idle_stats.xmit_idle = jiffies;
2886
2887         if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2888                 start_xmit(info);
2889         }
2890         return ret;
2891 }                               /* cy_write */
2892
2893 /*
2894  * This routine is called by the kernel to write a single
2895  * character to the tty device.  If the kernel uses this routine,
2896  * it must call the flush_chars() routine (if defined) when it is
2897  * done stuffing characters into the driver.  If there is no room
2898  * in the queue, the character is ignored.
2899  */
2900 static void cy_put_char(struct tty_struct *tty, unsigned char ch)
2901 {
2902         struct cyclades_port *info = tty->driver_data;
2903         unsigned long flags;
2904
2905 #ifdef CY_DEBUG_IO
2906         printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
2907 #endif
2908
2909         if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2910                 return;
2911
2912         if (!info->xmit_buf)
2913                 return;
2914
2915         spin_lock_irqsave(&info->card->card_lock, flags);
2916         if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2917                 spin_unlock_irqrestore(&info->card->card_lock, flags);
2918                 return;
2919         }
2920
2921         info->xmit_buf[info->xmit_head++] = ch;
2922         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2923         info->xmit_cnt++;
2924         info->idle_stats.xmit_bytes++;
2925         info->idle_stats.xmit_idle = jiffies;
2926         spin_unlock_irqrestore(&info->card->card_lock, flags);
2927 }                               /* cy_put_char */
2928
2929 /*
2930  * This routine is called by the kernel after it has written a
2931  * series of characters to the tty device using put_char().
2932  */
2933 static void cy_flush_chars(struct tty_struct *tty)
2934 {
2935         struct cyclades_port *info = tty->driver_data;
2936
2937 #ifdef CY_DEBUG_IO
2938         printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
2939 #endif
2940
2941         if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2942                 return;
2943
2944         if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2945                         !info->xmit_buf)
2946                 return;
2947
2948         start_xmit(info);
2949 }                               /* cy_flush_chars */
2950
2951 /*
2952  * This routine returns the numbers of characters the tty driver
2953  * will accept for queuing to be written.  This number is subject
2954  * to change as output buffers get emptied, or if the output flow
2955  * control is activated.
2956  */
2957 static int cy_write_room(struct tty_struct *tty)
2958 {
2959         struct cyclades_port *info = tty->driver_data;
2960         int ret;
2961
2962 #ifdef CY_DEBUG_IO
2963         printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
2964 #endif
2965
2966         if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2967                 return 0;
2968         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2969         if (ret < 0)
2970                 ret = 0;
2971         return ret;
2972 }                               /* cy_write_room */
2973
2974 static int cy_chars_in_buffer(struct tty_struct *tty)
2975 {
2976         struct cyclades_card *card;
2977         struct cyclades_port *info = tty->driver_data;
2978         int channel;
2979
2980         if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2981                 return 0;
2982
2983         card = info->card;
2984         channel = (info->line) - (card->first_line);
2985
2986 #ifdef Z_EXT_CHARS_IN_BUFFER
2987         if (!IS_CYC_Z(cy_card[card])) {
2988 #endif                          /* Z_EXT_CHARS_IN_BUFFER */
2989 #ifdef CY_DEBUG_IO
2990                 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2991                         info->line, info->xmit_cnt);
2992 #endif
2993                 return info->xmit_cnt;
2994 #ifdef Z_EXT_CHARS_IN_BUFFER
2995         } else {
2996                 static struct FIRM_ID *firm_id;
2997                 static struct ZFW_CTRL *zfw_ctrl;
2998                 static struct CH_CTRL *ch_ctrl;
2999                 static struct BUF_CTRL *buf_ctrl;
3000                 int char_count;
3001                 __u32 tx_put, tx_get, tx_bufsize;
3002
3003                 firm_id = card->base_addr + ID_ADDRESS;
3004                 zfw_ctrl = card->base_addr +
3005                         (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3006                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3007                 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
3008
3009                 tx_get = readl(&buf_ctrl->tx_get);
3010                 tx_put = readl(&buf_ctrl->tx_put);
3011                 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
3012                 if (tx_put >= tx_get)
3013                         char_count = tx_put - tx_get;
3014                 else
3015                         char_count = tx_put - tx_get + tx_bufsize;
3016 #ifdef CY_DEBUG_IO
3017                 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
3018                         info->line, info->xmit_cnt + char_count);
3019 #endif
3020                 return info->xmit_cnt + char_count;
3021         }
3022 #endif                          /* Z_EXT_CHARS_IN_BUFFER */
3023 }                               /* cy_chars_in_buffer */
3024
3025 /*
3026  * ------------------------------------------------------------
3027  * cy_ioctl() and friends
3028  * ------------------------------------------------------------
3029  */
3030
3031 static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
3032 {
3033         int co, co_val, bpr;
3034         __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
3035                         25000000);
3036
3037         if (baud == 0) {
3038                 info->tbpr = info->tco = info->rbpr = info->rco = 0;
3039                 return;
3040         }
3041
3042         /* determine which prescaler to use */
3043         for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
3044                 if (cy_clock / co_val / baud > 63)
3045                         break;
3046         }
3047
3048         bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
3049         if (bpr > 255)
3050                 bpr = 255;
3051
3052         info->tbpr = info->rbpr = bpr;
3053         info->tco = info->rco = co;
3054 }
3055
3056 /*
3057  * This routine finds or computes the various line characteristics.
3058  * It used to be called config_setup
3059  */
3060 static void set_line_char(struct cyclades_port *info)
3061 {
3062         struct cyclades_card *card;
3063         unsigned long flags;
3064         void __iomem *base_addr;
3065         int chip, channel, index;
3066         unsigned cflag, iflag;
3067         unsigned short chip_number;
3068         int baud, baud_rate = 0;
3069         int i;
3070
3071         if (!info->tty || !info->tty->termios) {
3072                 return;
3073         }
3074         if (info->line == -1) {
3075                 return;
3076         }
3077         cflag = info->tty->termios->c_cflag;
3078         iflag = info->tty->termios->c_iflag;
3079
3080         /*
3081          * Set up the tty->alt_speed kludge
3082          */
3083         if (info->tty) {
3084                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3085                         info->tty->alt_speed = 57600;
3086                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3087                         info->tty->alt_speed = 115200;
3088                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3089                         info->tty->alt_speed = 230400;
3090                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3091                         info->tty->alt_speed = 460800;
3092         }
3093
3094         card = info->card;
3095         channel = info->line - card->first_line;
3096         chip_number = channel / 4;
3097
3098         if (!IS_CYC_Z(*card)) {
3099
3100                 index = card->bus_index;
3101
3102                 /* baud rate */
3103                 baud = tty_get_baud_rate(info->tty);
3104                 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3105                                 ASYNC_SPD_CUST) {
3106                         if (info->custom_divisor)
3107                                 baud_rate = info->baud / info->custom_divisor;
3108                         else
3109                                 baud_rate = info->baud;
3110                 } else if (baud > CD1400_MAX_SPEED) {
3111                         baud = CD1400_MAX_SPEED;
3112                 }
3113                 /* find the baud index */
3114                 for (i = 0; i < 20; i++) {
3115                         if (baud == baud_table[i]) {
3116                                 break;
3117                         }
3118                 }
3119                 if (i == 20) {
3120                         i = 19; /* CD1400_MAX_SPEED */
3121                 }
3122
3123                 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3124                                 ASYNC_SPD_CUST) {
3125                         cyy_baud_calc(info, baud_rate);
3126                 } else {
3127                         if (info->chip_rev >= CD1400_REV_J) {
3128                                 /* It is a CD1400 rev. J or later */
3129                                 info->tbpr = baud_bpr_60[i];    /* Tx BPR */
3130                                 info->tco = baud_co_60[i];      /* Tx CO */
3131                                 info->rbpr = baud_bpr_60[i];    /* Rx BPR */
3132                                 info->rco = baud_co_60[i];      /* Rx CO */
3133                         } else {
3134                                 info->tbpr = baud_bpr_25[i];    /* Tx BPR */
3135                                 info->tco = baud_co_25[i];      /* Tx CO */
3136                                 info->rbpr = baud_bpr_25[i];    /* Rx BPR */
3137                                 info->rco = baud_co_25[i];      /* Rx CO */
3138                         }
3139                 }
3140                 if (baud_table[i] == 134) {
3141                         /* get it right for 134.5 baud */
3142                         info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3143                                         2;
3144                 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3145                                 ASYNC_SPD_CUST) {
3146                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3147                                         baud_rate) + 2;
3148                 } else if (baud_table[i]) {
3149                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3150                                         baud_table[i]) + 2;
3151                         /* this needs to be propagated into the card info */
3152                 } else {
3153                         info->timeout = 0;
3154                 }
3155                 /* By tradition (is it a standard?) a baud rate of zero
3156                    implies the line should be/has been closed.  A bit
3157                    later in this routine such a test is performed. */
3158
3159                 /* byte size and parity */
3160                 info->cor5 = 0;
3161                 info->cor4 = 0;
3162                 /* receive threshold */
3163                 info->cor3 = (info->default_threshold ?
3164                                 info->default_threshold : baud_cor3[i]);
3165                 info->cor2 = CyETC;
3166                 switch (cflag & CSIZE) {
3167                 case CS5:
3168                         info->cor1 = Cy_5_BITS;
3169                         break;
3170                 case CS6:
3171                         info->cor1 = Cy_6_BITS;
3172                         break;
3173                 case CS7:
3174                         info->cor1 = Cy_7_BITS;
3175                         break;
3176                 case CS8:
3177                         info->cor1 = Cy_8_BITS;
3178                         break;
3179                 }
3180                 if (cflag & CSTOPB) {
3181                         info->cor1 |= Cy_2_STOP;
3182                 }
3183                 if (cflag & PARENB) {
3184                         if (cflag & PARODD) {
3185                                 info->cor1 |= CyPARITY_O;
3186                         } else {
3187                                 info->cor1 |= CyPARITY_E;
3188                         }
3189                 } else {
3190                         info->cor1 |= CyPARITY_NONE;
3191                 }
3192
3193                 /* CTS flow control flag */
3194                 if (cflag & CRTSCTS) {
3195                         info->flags |= ASYNC_CTS_FLOW;
3196                         info->cor2 |= CyCtsAE;
3197                 } else {
3198                         info->flags &= ~ASYNC_CTS_FLOW;
3199                         info->cor2 &= ~CyCtsAE;
3200                 }
3201                 if (cflag & CLOCAL)
3202                         info->flags &= ~ASYNC_CHECK_CD;
3203                 else
3204                         info->flags |= ASYNC_CHECK_CD;
3205
3206          /***********************************************
3207             The hardware option, CyRtsAO, presents RTS when
3208             the chip has characters to send.  Since most modems
3209             use RTS as reverse (inbound) flow control, this
3210             option is not used.  If inbound flow control is
3211             necessary, DTR can be programmed to provide the
3212             appropriate signals for use with a non-standard
3213             cable.  Contact Marcio Saito for details.
3214          ***********************************************/
3215
3216                 chip = channel >> 2;
3217                 channel &= 0x03;
3218                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3219
3220                 spin_lock_irqsave(&card->card_lock, flags);
3221                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3222
3223                 /* tx and rx baud rate */
3224
3225                 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3226                 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3227                 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3228                 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3229
3230                 /* set line characteristics  according configuration */
3231
3232                 cy_writeb(base_addr + (CySCHR1 << index),
3233                           START_CHAR(info->tty));
3234                 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3235                 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3236                 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3237                 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3238                 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3239                 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3240
3241                 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3242                                 CyCOR3ch, index);
3243
3244                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);      /* !!! Is this needed? */
3245                 cy_writeb(base_addr + (CyRTPR << index),
3246                         (info->default_timeout ? info->default_timeout : 0x02));
3247                 /* 10ms rx timeout */
3248
3249                 if (C_CLOCAL(info->tty)) {
3250                         /* without modem intr */
3251                         cy_writeb(base_addr + (CySRER << index),
3252                                 readb(base_addr + (CySRER << index)) | CyMdmCh);
3253                         /* act on 1->0 modem transitions */
3254                         if ((cflag & CRTSCTS) && info->rflow) {
3255                                 cy_writeb(base_addr + (CyMCOR1 << index),
3256                                           (CyCTS | rflow_thr[i]));
3257                         } else {
3258                                 cy_writeb(base_addr + (CyMCOR1 << index),
3259                                           CyCTS);
3260                         }
3261                         /* act on 0->1 modem transitions */
3262                         cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3263                 } else {
3264                         /* without modem intr */
3265                         cy_writeb(base_addr + (CySRER << index),
3266                                   readb(base_addr +
3267                                            (CySRER << index)) | CyMdmCh);
3268                         /* act on 1->0 modem transitions */
3269                         if ((cflag & CRTSCTS) && info->rflow) {
3270                                 cy_writeb(base_addr + (CyMCOR1 << index),
3271                                           (CyDSR | CyCTS | CyRI | CyDCD |
3272                                            rflow_thr[i]));
3273                         } else {
3274                                 cy_writeb(base_addr + (CyMCOR1 << index),
3275                                           CyDSR | CyCTS | CyRI | CyDCD);
3276                         }
3277                         /* act on 0->1 modem transitions */
3278                         cy_writeb(base_addr + (CyMCOR2 << index),
3279                                   CyDSR | CyCTS | CyRI | CyDCD);
3280                 }
3281
3282                 if (i == 0) {   /* baud rate is zero, turn off line */
3283                         if (info->rtsdtr_inv) {
3284                                 cy_writeb(base_addr + (CyMSVR1 << index),
3285                                           ~CyRTS);
3286                         } else {
3287                                 cy_writeb(base_addr + (CyMSVR2 << index),
3288                                           ~CyDTR);
3289                         }
3290 #ifdef CY_DEBUG_DTR
3291                         printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3292                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3293                                 readb(base_addr + (CyMSVR1 << index)),
3294                                 readb(base_addr + (CyMSVR2 << index)));
3295 #endif
3296                 } else {
3297                         if (info->rtsdtr_inv) {
3298                                 cy_writeb(base_addr + (CyMSVR1 << index),
3299                                           CyRTS);
3300                         } else {
3301                                 cy_writeb(base_addr + (CyMSVR2 << index),
3302                                           CyDTR);
3303                         }
3304 #ifdef CY_DEBUG_DTR
3305                         printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3306                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3307                                 readb(base_addr + (CyMSVR1 << index)),
3308                                 readb(base_addr + (CyMSVR2 << index)));
3309 #endif
3310                 }
3311
3312                 if (info->tty) {
3313                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
3314                 }
3315                 spin_unlock_irqrestore(&card->card_lock, flags);
3316
3317         } else {
3318                 struct FIRM_ID __iomem *firm_id;
3319                 struct ZFW_CTRL __iomem *zfw_ctrl;
3320                 struct BOARD_CTRL __iomem *board_ctrl;
3321                 struct CH_CTRL __iomem *ch_ctrl;
3322                 struct BUF_CTRL __iomem *buf_ctrl;
3323                 __u32 sw_flow;
3324                 int retval;
3325
3326                 firm_id = card->base_addr + ID_ADDRESS;
3327                 if (!ISZLOADED(*card)) {
3328                         return;
3329                 }
3330
3331                 zfw_ctrl = card->base_addr +
3332                         (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3333                 board_ctrl = &zfw_ctrl->board_ctrl;
3334                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3335                 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3336
3337                 /* baud rate */
3338                 baud = tty_get_baud_rate(info->tty);
3339                 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3340                                 ASYNC_SPD_CUST) {
3341                         if (info->custom_divisor)
3342                                 baud_rate = info->baud / info->custom_divisor;
3343                         else
3344                                 baud_rate = info->baud;
3345                 } else if (baud > CYZ_MAX_SPEED) {
3346                         baud = CYZ_MAX_SPEED;
3347                 }
3348                 cy_writel(&ch_ctrl->comm_baud, baud);
3349
3350                 if (baud == 134) {
3351                         /* get it right for 134.5 baud */
3352                         info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3353                                         2;
3354                 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3355                                 ASYNC_SPD_CUST) {
3356                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3357                                         baud_rate) + 2;
3358                 } else if (baud) {
3359                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3360                                         baud) + 2;
3361                         /* this needs to be propagated into the card info */
3362                 } else {
3363                         info->timeout = 0;
3364                 }
3365
3366                 /* byte size and parity */
3367                 switch (cflag & CSIZE) {
3368                 case CS5:
3369                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3370                         break;
3371                 case CS6:
3372                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3373                         break;
3374                 case CS7:
3375                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3376                         break;
3377                 case CS8:
3378                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3379                         break;
3380                 }
3381                 if (cflag & CSTOPB) {
3382                         cy_writel(&ch_ctrl->comm_data_l,
3383                                   readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3384                 } else {
3385                         cy_writel(&ch_ctrl->comm_data_l,
3386                                   readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3387                 }
3388                 if (cflag & PARENB) {
3389                         if (cflag & PARODD) {
3390                                 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3391                         } else {
3392                                 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3393                         }
3394                 } else {
3395                         cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3396                 }
3397
3398                 /* CTS flow control flag */
3399                 if (cflag & CRTSCTS) {
3400                         cy_writel(&ch_ctrl->hw_flow,
3401                                 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3402                 } else {
3403                         cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3404                                         ~(C_RS_CTS | C_RS_RTS));
3405                 }
3406                 /* As the HW flow control is done in firmware, the driver
3407                    doesn't need to care about it */
3408                 info->flags &= ~ASYNC_CTS_FLOW;
3409
3410                 /* XON/XOFF/XANY flow control flags */
3411                 sw_flow = 0;
3412                 if (iflag & IXON) {
3413                         sw_flow |= C_FL_OXX;
3414                         if (iflag & IXANY)
3415                                 sw_flow |= C_FL_OIXANY;
3416                 }
3417                 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3418
3419                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
3420                 if (retval != 0) {
3421                         printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3422                                 "was %x\n", info->line, retval);
3423                 }
3424
3425                 /* CD sensitivity */
3426                 if (cflag & CLOCAL) {
3427                         info->flags &= ~ASYNC_CHECK_CD;
3428                 } else {
3429                         info->flags |= ASYNC_CHECK_CD;
3430                 }
3431
3432                 if (baud == 0) {        /* baud rate is zero, turn off line */
3433                         cy_writel(&ch_ctrl->rs_control,
3434                                   readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3435 #ifdef CY_DEBUG_DTR
3436                         printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
3437 #endif
3438                 } else {
3439                         cy_writel(&ch_ctrl->rs_control,
3440                                   readl(&ch_ctrl->rs_control) | C_RS_DTR);
3441 #ifdef CY_DEBUG_DTR
3442                         printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
3443 #endif
3444                 }
3445
3446                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM,0L);
3447                 if (retval != 0) {
3448                         printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3449                                 "was %x\n", info->line, retval);
3450                 }
3451
3452                 if (info->tty) {
3453                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
3454                 }
3455         }
3456 }                               /* set_line_char */
3457
3458 static int
3459 get_serial_info(struct cyclades_port *info,
3460                 struct serial_struct __user * retinfo)
3461 {
3462         struct serial_struct tmp;
3463         struct cyclades_card *cinfo = info->card;
3464
3465         if (!retinfo)
3466                 return -EFAULT;
3467         memset(&tmp, 0, sizeof(tmp));
3468         tmp.type = info->type;
3469         tmp.line = info->line;
3470         tmp.port = (info->card - cy_card) * 0x100 + info->line -
3471                 cinfo->first_line;
3472         tmp.irq = cinfo->irq;
3473         tmp.flags = info->flags;
3474         tmp.close_delay = info->close_delay;
3475         tmp.closing_wait = info->closing_wait;
3476         tmp.baud_base = info->baud;
3477         tmp.custom_divisor = info->custom_divisor;
3478         tmp.hub6 = 0;           /*!!! */
3479         return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3480 }                               /* get_serial_info */
3481
3482 static int
3483 set_serial_info(struct cyclades_port *info,
3484                 struct serial_struct __user * new_info)
3485 {
3486         struct serial_struct new_serial;
3487         struct cyclades_port old_info;
3488
3489         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3490                 return -EFAULT;
3491         old_info = *info;
3492
3493         if (!capable(CAP_SYS_ADMIN)) {
3494                 if (new_serial.close_delay != info->close_delay ||
3495                                 new_serial.baud_base != info->baud ||
3496                                 (new_serial.flags & ASYNC_FLAGS &
3497                                         ~ASYNC_USR_MASK) !=
3498                                 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3499                         return -EPERM;
3500                 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3501                                 (new_serial.flags & ASYNC_USR_MASK);
3502                 info->baud = new_serial.baud_base;
3503                 info->custom_divisor = new_serial.custom_divisor;
3504                 goto check_and_exit;
3505         }
3506
3507         /*
3508          * OK, past this point, all the error checking has been done.
3509          * At this point, we start making changes.....
3510          */
3511
3512         info->baud = new_serial.baud_base;
3513         info->custom_divisor = new_serial.custom_divisor;
3514         info->flags = (info->flags & ~ASYNC_FLAGS) |
3515                         (new_serial.flags & ASYNC_FLAGS);
3516         info->close_delay = new_serial.close_delay * HZ / 100;
3517         info->closing_wait = new_serial.closing_wait * HZ / 100;
3518
3519 check_and_exit:
3520         if (info->flags & ASYNC_INITIALIZED) {
3521                 set_line_char(info);
3522                 return 0;
3523         } else {
3524                 return startup(info);
3525         }
3526 }                               /* set_serial_info */
3527
3528 /*
3529  * get_lsr_info - get line status register info
3530  *
3531  * Purpose: Let user call ioctl() to get info when the UART physically
3532  *          is emptied.  On bus types like RS485, the transmitter must
3533  *          release the bus after transmitting. This must be done when
3534  *          the transmit shift register is empty, not be done when the
3535  *          transmit holding register is empty.  This functionality
3536  *          allows an RS485 driver to be written in user space.
3537  */
3538 static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
3539 {
3540         struct cyclades_card *card;
3541         int chip, channel, index;
3542         unsigned char status;
3543         unsigned int result;
3544         unsigned long flags;
3545         void __iomem *base_addr;
3546
3547         card = info->card;
3548         channel = (info->line) - (card->first_line);
3549         if (!IS_CYC_Z(*card)) {
3550                 chip = channel >> 2;
3551                 channel &= 0x03;
3552                 index = card->bus_index;
3553                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3554
3555                 spin_lock_irqsave(&card->card_lock, flags);
3556                 status = readb(base_addr + (CySRER << index)) &
3557                                 (CyTxRdy | CyTxMpty);
3558                 spin_unlock_irqrestore(&card->card_lock, flags);
3559                 result = (status ? 0 : TIOCSER_TEMT);
3560         } else {
3561                 /* Not supported yet */
3562                 return -EINVAL;
3563         }
3564         return put_user(result, (unsigned long __user *)value);
3565 }
3566
3567 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3568 {
3569         struct cyclades_port *info = tty->driver_data;
3570         struct cyclades_card *card;
3571         int chip, channel, index;
3572         void __iomem *base_addr;
3573         unsigned long flags;
3574         unsigned char status;
3575         unsigned long lstatus;
3576         unsigned int result;
3577         struct FIRM_ID __iomem *firm_id;
3578         struct ZFW_CTRL __iomem *zfw_ctrl;
3579         struct BOARD_CTRL __iomem *board_ctrl;
3580         struct CH_CTRL __iomem *ch_ctrl;
3581
3582         if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3583                 return -ENODEV;
3584
3585         card = info->card;
3586         channel = info->line - card->first_line;
3587         if (!IS_CYC_Z(*card)) {
3588                 chip = channel >> 2;
3589                 channel &= 0x03;
3590                 index = card->bus_index;
3591                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3592
3593                 spin_lock_irqsave(&card->card_lock, flags);
3594                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3595                 status = readb(base_addr + (CyMSVR1 << index));
3596                 status |= readb(base_addr + (CyMSVR2 << index));
3597                 spin_unlock_irqrestore(&card->card_lock, flags);
3598
3599                 if (info->rtsdtr_inv) {
3600                         result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3601                                 ((status & CyDTR) ? TIOCM_RTS : 0);
3602                 } else {
3603                         result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3604                                 ((status & CyDTR) ? TIOCM_DTR : 0);
3605                 }
3606                 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3607                         ((status & CyRI) ? TIOCM_RNG : 0) |
3608                         ((status & CyDSR) ? TIOCM_DSR : 0) |
3609                         ((status & CyCTS) ? TIOCM_CTS : 0);
3610         } else {
3611                 base_addr = card->base_addr;
3612                 firm_id = card->base_addr + ID_ADDRESS;
3613                 if (ISZLOADED(*card)) {
3614                         zfw_ctrl = card->base_addr +
3615                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3616                         board_ctrl = &zfw_ctrl->board_ctrl;
3617                         ch_ctrl = zfw_ctrl->ch_ctrl;
3618                         lstatus = readl(&ch_ctrl[channel].rs_status);
3619                         result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3620                                 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3621                                 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3622                                 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3623                                 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3624                                 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3625                 } else {
3626                         result = 0;
3627                         return -ENODEV;
3628                 }
3629
3630         }
3631         return result;
3632 }                               /* cy_tiomget */
3633
3634 static int
3635 cy_tiocmset(struct tty_struct *tty, struct file *file,
3636                 unsigned int set, unsigned int clear)
3637 {
3638         struct cyclades_port *info = tty->driver_data;
3639         struct cyclades_card *card;
3640         int chip, channel, index;
3641         void __iomem *base_addr;
3642         unsigned long flags;
3643         struct FIRM_ID __iomem *firm_id;
3644         struct ZFW_CTRL __iomem *zfw_ctrl;
3645         struct BOARD_CTRL __iomem *board_ctrl;
3646         struct CH_CTRL __iomem *ch_ctrl;
3647         int retval;
3648
3649         if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3650                 return -ENODEV;
3651
3652         card = info->card;
3653         channel = (info->line) - (card->first_line);
3654         if (!IS_CYC_Z(*card)) {
3655                 chip = channel >> 2;
3656                 channel &= 0x03;
3657                 index = card->bus_index;
3658                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3659
3660                 if (set & TIOCM_RTS) {
3661                         spin_lock_irqsave(&card->card_lock, flags);
3662                         cy_writeb(base_addr + (CyCAR << index),
3663                                   (u_char) channel);
3664                         if (info->rtsdtr_inv) {
3665                                 cy_writeb(base_addr + (CyMSVR2 << index),
3666                                           CyDTR);
3667                         } else {
3668                                 cy_writeb(base_addr + (CyMSVR1 << index),
3669                                           CyRTS);
3670                         }
3671                         spin_unlock_irqrestore(&card->card_lock, flags);
3672                 }
3673                 if (clear & TIOCM_RTS) {
3674                         spin_lock_irqsave(&card->card_lock, flags);
3675                         cy_writeb(base_addr + (CyCAR << index),
3676                                   (u_char) channel);
3677                         if (info->rtsdtr_inv) {
3678                                 cy_writeb(base_addr + (CyMSVR2 << index),
3679                                           ~CyDTR);
3680                         } else {
3681                                 cy_writeb(base_addr + (CyMSVR1 << index),
3682                                           ~CyRTS);
3683                         }
3684                         spin_unlock_irqrestore(&card->card_lock, flags);
3685                 }
3686                 if (set & TIOCM_DTR) {
3687                         spin_lock_irqsave(&card->card_lock, flags);
3688                         cy_writeb(base_addr + (CyCAR << index),
3689                                   (u_char) channel);
3690                         if (info->rtsdtr_inv) {
3691                                 cy_writeb(base_addr + (CyMSVR1 << index),
3692                                           CyRTS);
3693                         } else {
3694                                 cy_writeb(base_addr + (CyMSVR2 << index),
3695                                           CyDTR);
3696                         }
3697 #ifdef CY_DEBUG_DTR
3698                         printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3699                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3700                                 readb(base_addr + (CyMSVR1 << index)),
3701                                 readb(base_addr + (CyMSVR2 << index)));
3702 #endif
3703                         spin_unlock_irqrestore(&card->card_lock, flags);
3704                 }
3705                 if (clear & TIOCM_DTR) {
3706                         spin_lock_irqsave(&card->card_lock, flags);
3707                         cy_writeb(base_addr + (CyCAR << index),
3708                                   (u_char) channel);
3709                         if (info->rtsdtr_inv) {
3710                                 cy_writeb(base_addr + (CyMSVR1 << index),
3711                                           ~CyRTS);
3712                         } else {
3713                                 cy_writeb(base_addr + (CyMSVR2 << index),
3714                                           ~CyDTR);
3715                         }
3716
3717 #ifdef CY_DEBUG_DTR
3718                         printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3719                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3720                                 readb(base_addr + (CyMSVR1 << index)),
3721                                 readb(base_addr + (CyMSVR2 << index)));
3722 #endif
3723                         spin_unlock_irqrestore(&card->card_lock, flags);
3724                 }
3725         } else {
3726                 base_addr = card->base_addr;
3727
3728                 firm_id = card->base_addr + ID_ADDRESS;
3729                 if (ISZLOADED(*card)) {
3730                         zfw_ctrl = card->base_addr +
3731                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3732                         board_ctrl = &zfw_ctrl->board_ctrl;
3733                         ch_ctrl = zfw_ctrl->ch_ctrl;
3734
3735                         if (set & TIOCM_RTS) {
3736                                 spin_lock_irqsave(&card->card_lock, flags);
3737                                 cy_writel(&ch_ctrl[channel].rs_control,
3738                                         readl(&ch_ctrl[channel].rs_control) |
3739                                         C_RS_RTS);
3740                                 spin_unlock_irqrestore(&card->card_lock, flags);
3741                         }
3742                         if (clear & TIOCM_RTS) {
3743                                 spin_lock_irqsave(&card->card_lock, flags);
3744                                 cy_writel(&ch_ctrl[channel].rs_control,
3745                                         readl(&ch_ctrl[channel].rs_control) &
3746                                         ~C_RS_RTS);
3747                                 spin_unlock_irqrestore(&card->card_lock, flags);
3748                         }
3749                         if (set & TIOCM_DTR) {
3750                                 spin_lock_irqsave(&card->card_lock, flags);
3751                                 cy_writel(&ch_ctrl[channel].rs_control,
3752                                         readl(&ch_ctrl[channel].rs_control) |
3753                                         C_RS_DTR);
3754 #ifdef CY_DEBUG_DTR
3755                                 printk(KERN_DEBUG "cyc:set_modem_info raising "
3756                                         "Z DTR\n");
3757 #endif
3758                                 spin_unlock_irqrestore(&card->card_lock, flags);
3759                         }
3760                         if (clear & TIOCM_DTR) {
3761                                 spin_lock_irqsave(&card->card_lock, flags);
3762                                 cy_writel(&ch_ctrl[channel].rs_control,
3763                                         readl(&ch_ctrl[channel].rs_control) &
3764                                         ~C_RS_DTR);
3765 #ifdef CY_DEBUG_DTR
3766                                 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3767                                         "Z DTR\n");
3768 #endif
3769                                 spin_unlock_irqrestore(&card->card_lock, flags);
3770                         }
3771                 } else {
3772                         return -ENODEV;
3773                 }
3774                 spin_lock_irqsave(&card->card_lock, flags);
3775                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
3776                 if (retval != 0) {
3777                         printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3778                                 "was %x\n", info->line, retval);
3779                 }
3780                 spin_unlock_irqrestore(&card->card_lock, flags);
3781         }
3782         return 0;
3783 }                               /* cy_tiocmset */
3784
3785 /*
3786  * cy_break() --- routine which turns the break handling on or off
3787  */
3788 static void cy_break(struct tty_struct *tty, int break_state)
3789 {
3790         struct cyclades_port *info = tty->driver_data;
3791         struct cyclades_card *card;
3792         unsigned long flags;
3793
3794         if (serial_paranoia_check(info, tty->name, "cy_break"))
3795                 return;
3796
3797         card = info->card;
3798
3799         spin_lock_irqsave(&card->card_lock, flags);
3800         if (!IS_CYC_Z(*card)) {
3801                 /* Let the transmit ISR take care of this (since it
3802                    requires stuffing characters into the output stream).
3803                  */
3804                 if (break_state == -1) {
3805                         if (!info->breakon) {
3806                                 info->breakon = 1;
3807                                 if (!info->xmit_cnt) {
3808                                         spin_unlock_irqrestore(&card->card_lock, flags);
3809                                         start_xmit(info);
3810                                         spin_lock_irqsave(&card->card_lock, flags);
3811                                 }
3812                         }
3813                 } else {
3814                         if (!info->breakoff) {
3815                                 info->breakoff = 1;
3816                                 if (!info->xmit_cnt) {
3817                                         spin_unlock_irqrestore(&card->card_lock, flags);
3818                                         start_xmit(info);
3819                                         spin_lock_irqsave(&card->card_lock, flags);
3820                                 }
3821                         }
3822                 }
3823         } else {
3824                 int retval;
3825
3826                 if (break_state == -1) {
3827                         retval = cyz_issue_cmd(card,
3828                                 info->line - card->first_line,
3829                                 C_CM_SET_BREAK, 0L);
3830                         if (retval != 0) {
3831                                 printk(KERN_ERR "cyc:cy_break (set) retval on "
3832                                         "ttyC%d was %x\n", info->line, retval);
3833                         }
3834                 } else {
3835                         retval = cyz_issue_cmd(card,
3836                                 info->line - card->first_line,
3837                                 C_CM_CLR_BREAK, 0L);
3838                         if (retval != 0) {
3839                                 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3840                                         "on ttyC%d was %x\n", info->line,
3841                                         retval);
3842                         }
3843                 }
3844         }
3845         spin_unlock_irqrestore(&card->card_lock, flags);
3846 }                               /* cy_break */
3847
3848 static int
3849 get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
3850 {
3851
3852         if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3853                 return -EFAULT;
3854         info->mon.int_count = 0;
3855         info->mon.char_count = 0;
3856         info->mon.char_max = 0;
3857         info->mon.char_last = 0;
3858         return 0;
3859 }                               /* get_mon_info */
3860
3861 static int set_threshold(struct cyclades_port *info, unsigned long value)
3862 {
3863         struct cyclades_card *card;
3864         void __iomem *base_addr;
3865         int channel, chip, index;
3866         unsigned long flags;
3867
3868         card = info->card;
3869         channel = info->line - card->first_line;
3870         if (!IS_CYC_Z(*card)) {
3871                 chip = channel >> 2;
3872                 channel &= 0x03;
3873                 index = card->bus_index;
3874                 base_addr =
3875                     card->base_addr + (cy_chip_offset[chip] << index);
3876
3877                 info->cor3 &= ~CyREC_FIFO;
3878                 info->cor3 |= value & CyREC_FIFO;
3879
3880                 spin_lock_irqsave(&card->card_lock, flags);
3881                 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3882                 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3883                 spin_unlock_irqrestore(&card->card_lock, flags);
3884         }
3885         return 0;
3886 }                               /* set_threshold */
3887
3888 static int
3889 get_threshold(struct cyclades_port *info, unsigned long __user * value)
3890 {
3891         struct cyclades_card *card;
3892         void __iomem *base_addr;
3893         int channel, chip, index;
3894         unsigned long tmp;
3895
3896         card = info->card;
3897         channel = info->line - card->first_line;
3898         if (!IS_CYC_Z(*card)) {
3899                 chip = channel >> 2;
3900                 channel &= 0x03;
3901                 index = card->bus_index;
3902                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3903
3904                 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3905                 return put_user(tmp, value);
3906         }
3907         return 0;
3908 }                               /* get_threshold */
3909
3910 static int
3911 set_default_threshold(struct cyclades_port *info, unsigned long value)
3912 {
3913         info->default_threshold = value & 0x0f;
3914         return 0;
3915 }                               /* set_default_threshold */
3916
3917 static int
3918 get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
3919 {
3920         return put_user(info->default_threshold, value);
3921 }                               /* get_default_threshold */
3922
3923 static int set_timeout(struct cyclades_port *info, unsigned long value)
3924 {
3925         struct cyclades_card *card;
3926         void __iomem *base_addr;
3927         int channel, chip, index;
3928         unsigned long flags;
3929
3930         card = info->card;
3931         channel = info->line - card->first_line;
3932         if (!IS_CYC_Z(*card)) {
3933                 chip = channel >> 2;
3934                 channel &= 0x03;
3935                 index = card->bus_index;
3936                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3937
3938                 spin_lock_irqsave(&card->card_lock, flags);
3939                 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3940                 spin_unlock_irqrestore(&card->card_lock, flags);
3941         }
3942         return 0;
3943 }                               /* set_timeout */
3944
3945 static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
3946 {
3947         struct cyclades_card *card;
3948         void __iomem *base_addr;
3949         int channel, chip, index;
3950         unsigned long tmp;
3951
3952         card = info->card;
3953         channel = info->line - card->first_line;
3954         if (!IS_CYC_Z(*card)) {
3955                 chip = channel >> 2;
3956                 channel &= 0x03;
3957                 index = card->bus_index;
3958                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3959
3960                 tmp = readb(base_addr + (CyRTPR << index));
3961                 return put_user(tmp, value);
3962         }
3963         return 0;
3964 }                               /* get_timeout */
3965
3966 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
3967 {
3968         info->default_timeout = value & 0xff;
3969         return 0;
3970 }                               /* set_default_timeout */
3971
3972 static int
3973 get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
3974 {
3975         return put_user(info->default_timeout, value);
3976 }                               /* get_default_timeout */
3977
3978 /*
3979  * This routine allows the tty driver to implement device-
3980  * specific ioctl's.  If the ioctl number passed in cmd is
3981  * not recognized by the driver, it should return ENOIOCTLCMD.
3982  */
3983 static int
3984 cy_ioctl(struct tty_struct *tty, struct file *file,
3985          unsigned int cmd, unsigned long arg)
3986 {
3987         struct cyclades_port *info = tty->driver_data;
3988         struct cyclades_icount cprev, cnow;     /* kernel counter temps */
3989         struct serial_icounter_struct __user *p_cuser;  /* user space */
3990         int ret_val = 0;
3991         unsigned long flags;
3992         void __user *argp = (void __user *)arg;
3993
3994         if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
3995                 return -ENODEV;
3996
3997 #ifdef CY_DEBUG_OTHER
3998         printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
3999                 info->line, cmd, arg);
4000 #endif
4001
4002         switch (cmd) {
4003         case CYGETMON:
4004                 ret_val = get_mon_info(info, argp);
4005                 break;
4006         case CYGETTHRESH:
4007                 ret_val = get_threshold(info, argp);
4008                 break;
4009         case CYSETTHRESH:
4010                 ret_val = set_threshold(info, arg);
4011                 break;
4012         case CYGETDEFTHRESH:
4013                 ret_val = get_default_threshold(info, argp);
4014                 break;
4015         case CYSETDEFTHRESH:
4016                 ret_val = set_default_threshold(info, arg);
4017                 break;
4018         case CYGETTIMEOUT:
4019                 ret_val = get_timeout(info, argp);
4020                 break;
4021         case CYSETTIMEOUT:
4022                 ret_val = set_timeout(info, arg);
4023                 break;
4024         case CYGETDEFTIMEOUT:
4025                 ret_val = get_default_timeout(info, argp);
4026                 break;
4027         case CYSETDEFTIMEOUT:
4028                 ret_val = set_default_timeout(info, arg);
4029                 break;
4030         case CYSETRFLOW:
4031                 info->rflow = (int)arg;
4032                 ret_val = 0;
4033                 break;
4034         case CYGETRFLOW:
4035                 ret_val = info->rflow;
4036                 break;
4037         case CYSETRTSDTR_INV:
4038                 info->rtsdtr_inv = (int)arg;
4039                 ret_val = 0;
4040                 break;
4041         case CYGETRTSDTR_INV:
4042                 ret_val = info->rtsdtr_inv;
4043                 break;
4044         case CYGETCD1400VER:
4045                 ret_val = info->chip_rev;
4046                 break;
4047 #ifndef CONFIG_CYZ_INTR
4048         case CYZSETPOLLCYCLE:
4049                 cyz_polling_cycle = (arg * HZ) / 1000;
4050                 ret_val = 0;
4051                 break;
4052         case CYZGETPOLLCYCLE:
4053                 ret_val = (cyz_polling_cycle * 1000) / HZ;
4054                 break;
4055 #endif                          /* CONFIG_CYZ_INTR */
4056         case CYSETWAIT:
4057                 info->closing_wait = (unsigned short)arg *HZ / 100;
4058                 ret_val = 0;
4059                 break;
4060         case CYGETWAIT:
4061                 ret_val = info->closing_wait / (HZ / 100);
4062                 break;
4063         case TIOCGSERIAL:
4064                 ret_val = get_serial_info(info, argp);
4065                 break;
4066         case TIOCSSERIAL:
4067                 ret_val = set_serial_info(info, argp);
4068                 break;
4069         case TIOCSERGETLSR:     /* Get line status register */
4070                 ret_val = get_lsr_info(info, argp);
4071                 break;
4072                 /*
4073                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4074                  * - mask passed in arg for lines of interest
4075                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4076                  * Caller should use TIOCGICOUNT to see which one it was
4077                  */
4078         case TIOCMIWAIT:
4079                 spin_lock_irqsave(&info->card->card_lock, flags);
4080                 /* note the counters on entry */
4081                 cnow = info->icount;
4082                 spin_unlock_irqrestore(&info->card->card_lock, flags);
4083                 ret_val = wait_event_interruptible(info->delta_msr_wait, ({
4084                         cprev = cnow;
4085                         spin_lock_irqsave(&info->card->card_lock, flags);
4086                         cnow = info->icount;    /* atomic copy */
4087                         spin_unlock_irqrestore(&info->card->card_lock, flags);
4088
4089                         ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4090                         ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4091                         ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
4092                         ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
4093                 }));
4094                 break;
4095
4096                 /*
4097                  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4098                  * Return: write counters to the user passed counter struct
4099                  * NB: both 1->0 and 0->1 transitions are counted except for
4100                  *     RI where only 0->1 is counted.
4101                  */
4102         case TIOCGICOUNT:
4103                 spin_lock_irqsave(&info->card->card_lock, flags);
4104                 cnow = info->icount;
4105                 spin_unlock_irqrestore(&info->card->card_lock, flags);
4106                 p_cuser = argp;
4107                 ret_val = put_user(cnow.cts, &p_cuser->cts);
4108                 if (ret_val)
4109                         return ret_val;
4110                 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4111                 if (ret_val)
4112                         return ret_val;
4113                 ret_val = put_user(cnow.rng, &p_cuser->rng);
4114                 if (ret_val)
4115                         return ret_val;
4116                 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4117                 if (ret_val)
4118                         return ret_val;
4119                 ret_val = put_user(cnow.rx, &p_cuser->rx);
4120                 if (ret_val)
4121                         return ret_val;
4122                 ret_val = put_user(cnow.tx, &p_cuser->tx);
4123                 if (ret_val)
4124                         return ret_val;
4125                 ret_val = put_user(cnow.frame, &p_cuser->frame);
4126                 if (ret_val)
4127                         return ret_val;
4128                 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4129                 if (ret_val)
4130                         return ret_val;
4131                 ret_val = put_user(cnow.parity, &p_cuser->parity);
4132                 if (ret_val)
4133                         return ret_val;
4134                 ret_val = put_user(cnow.brk, &p_cuser->brk);
4135                 if (ret_val)
4136                         return ret_val;
4137                 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4138                 if (ret_val)
4139                         return ret_val;
4140                 ret_val = 0;
4141                 break;
4142         default:
4143                 ret_val = -ENOIOCTLCMD;
4144         }
4145
4146 #ifdef CY_DEBUG_OTHER
4147         printk(KERN_DEBUG "cyc:cy_ioctl done\n");
4148 #endif
4149
4150         return ret_val;
4151 }                               /* cy_ioctl */
4152
4153 /*
4154  * This routine allows the tty driver to be notified when
4155  * device's termios settings have changed.  Note that a
4156  * well-designed tty driver should be prepared to accept the case
4157  * where old == NULL, and try to do something rational.
4158  */
4159 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4160 {
4161         struct cyclades_port *info = tty->driver_data;
4162
4163 #ifdef CY_DEBUG_OTHER
4164         printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
4165 #endif
4166
4167         set_line_char(info);
4168
4169         if ((old_termios->c_cflag & CRTSCTS) &&
4170                         !(tty->termios->c_cflag & CRTSCTS)) {
4171                 tty->hw_stopped = 0;
4172                 cy_start(tty);
4173         }
4174 #if 0
4175         /*
4176          * No need to wake up processes in open wait, since they
4177          * sample the CLOCAL flag once, and don't recheck it.
4178          * XXX  It's not clear whether the current behavior is correct
4179          * or not.  Hence, this may change.....
4180          */
4181         if (!(old_termios->c_cflag & CLOCAL) &&
4182             (tty->termios->c_cflag & CLOCAL))
4183                 wake_up_interruptible(&info->open_wait);
4184 #endif
4185 }                               /* cy_set_termios */
4186
4187 /* This function is used to send a high-priority XON/XOFF character to
4188    the device.
4189 */
4190 static void cy_send_xchar(struct tty_struct *tty, char ch)
4191 {
4192         struct cyclades_port *info = tty->driver_data;
4193         struct cyclades_card *card;
4194         int channel;
4195
4196         if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4197                 return;
4198
4199         info->x_char = ch;
4200
4201         if (ch)
4202                 cy_start(tty);
4203
4204         card = info->card;
4205         channel = info->line - card->first_line;
4206
4207         if (IS_CYC_Z(*card)) {
4208                 if (ch == STOP_CHAR(tty))
4209                         cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
4210                 else if (ch == START_CHAR(tty))
4211                         cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
4212         }
4213 }
4214
4215 /* This routine is called by the upper-layer tty layer to signal
4216    that incoming characters should be throttled because the input
4217    buffers are close to full.
4218  */
4219 static void cy_throttle(struct tty_struct *tty)
4220 {
4221         struct cyclades_port *info = tty->driver_data;
4222         struct cyclades_card *card;
4223         unsigned long flags;
4224         void __iomem *base_addr;
4225         int chip, channel, index;
4226
4227 #ifdef CY_DEBUG_THROTTLE
4228         char buf[64];
4229
4230         printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
4231                         tty->ldisc.chars_in_buffer(tty), info->line);
4232 #endif
4233
4234         if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
4235                 return;
4236         }
4237
4238         card = info->card;
4239
4240         if (I_IXOFF(tty)) {
4241                 if (!IS_CYC_Z(*card))
4242                         cy_send_xchar(tty, STOP_CHAR(tty));
4243                 else
4244                         info->throttle = 1;
4245         }
4246
4247         if (tty->termios->c_cflag & CRTSCTS) {
4248                 channel = info->line - card->first_line;
4249                 if (!IS_CYC_Z(*card)) {
4250                         chip = channel >> 2;
4251                         channel &= 0x03;
4252                         index = card->bus_index;
4253                         base_addr = card->base_addr +
4254                                 (cy_chip_offset[chip] << index);
4255
4256                         spin_lock_irqsave(&card->card_lock, flags);
4257                         cy_writeb(base_addr + (CyCAR << index),
4258                                   (u_char) channel);
4259                         if (info->rtsdtr_inv) {
4260                                 cy_writeb(base_addr + (CyMSVR2 << index),
4261                                           ~CyDTR);
4262                         } else {
4263                                 cy_writeb(base_addr + (CyMSVR1 << index),
4264                                           ~CyRTS);
4265                         }
4266                         spin_unlock_irqrestore(&card->card_lock, flags);
4267                 } else {
4268                         info->throttle = 1;
4269                 }
4270         }
4271 }                               /* cy_throttle */
4272
4273 /*
4274  * This routine notifies the tty driver that it should signal
4275  * that characters can now be sent to the tty without fear of
4276  * overrunning the input buffers of the line disciplines.
4277  */
4278 static void cy_unthrottle(struct tty_struct *tty)
4279 {
4280         struct cyclades_port *info = tty->driver_data;
4281         struct cyclades_card *card;
4282         unsigned long flags;
4283         void __iomem *base_addr;
4284         int chip, channel, index;
4285
4286 #ifdef CY_DEBUG_THROTTLE
4287         char buf[64];
4288
4289         printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
4290                 tty_name(tty, buf), tty->ldisc.chars_in_buffer(tty),info->line);
4291 #endif
4292
4293         if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
4294                 return;
4295         }
4296
4297         if (I_IXOFF(tty)) {
4298                 if (info->x_char)
4299                         info->x_char = 0;
4300                 else
4301                         cy_send_xchar(tty, START_CHAR(tty));
4302         }
4303
4304         if (tty->termios->c_cflag & CRTSCTS) {
4305                 card = info->card;
4306                 channel = info->line - card->first_line;
4307                 if (!IS_CYC_Z(*card)) {
4308                         chip = channel >> 2;
4309                         channel &= 0x03;
4310                         index = card->bus_index;
4311                         base_addr = card->base_addr +
4312                                 (cy_chip_offset[chip] << index);
4313
4314                         spin_lock_irqsave(&card->card_lock, flags);
4315                         cy_writeb(base_addr + (CyCAR << index),
4316                                   (u_char) channel);
4317                         if (info->rtsdtr_inv) {
4318                                 cy_writeb(base_addr + (CyMSVR2 << index),
4319                                           CyDTR);
4320                         } else {
4321                                 cy_writeb(base_addr + (CyMSVR1 << index),
4322                                           CyRTS);
4323                         }
4324                         spin_unlock_irqrestore(&card->card_lock, flags);
4325                 } else {
4326                         info->throttle = 0;
4327                 }
4328         }
4329 }                               /* cy_unthrottle */
4330
4331 /* cy_start and cy_stop provide software output flow control as a
4332    function of XON/XOFF, software CTS, and other such stuff.
4333 */
4334 static void cy_stop(struct tty_struct *tty)
4335 {
4336         struct cyclades_card *cinfo;
4337         struct cyclades_port *info = tty->driver_data;
4338         void __iomem *base_addr;
4339         int chip, channel, index;
4340         unsigned long flags;
4341
4342 #ifdef CY_DEBUG_OTHER
4343         printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
4344 #endif
4345
4346         if (serial_paranoia_check(info, tty->name, "cy_stop"))
4347                 return;
4348
4349         cinfo = info->card;
4350         channel = info->line - cinfo->first_line;
4351         if (!IS_CYC_Z(*cinfo)) {
4352                 index = cinfo->bus_index;
4353                 chip = channel >> 2;
4354                 channel &= 0x03;
4355                 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4356
4357                 spin_lock_irqsave(&cinfo->card_lock, flags);
4358                 cy_writeb(base_addr + (CyCAR << index),
4359                         (u_char)(channel & 0x0003)); /* index channel */
4360                 cy_writeb(base_addr + (CySRER << index),
4361                           readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4362                 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4363         }
4364 }                               /* cy_stop */
4365
4366 static void cy_start(struct tty_struct *tty)
4367 {
4368         struct cyclades_card *cinfo;
4369         struct cyclades_port *info = tty->driver_data;
4370         void __iomem *base_addr;
4371         int chip, channel, index;
4372         unsigned long flags;
4373
4374 #ifdef CY_DEBUG_OTHER
4375         printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
4376 #endif
4377
4378         if (serial_paranoia_check(info, tty->name, "cy_start"))
4379                 return;
4380
4381         cinfo = info->card;
4382         channel = info->line - cinfo->first_line;
4383         index = cinfo->bus_index;
4384         if (!IS_CYC_Z(*cinfo)) {
4385                 chip = channel >> 2;
4386                 channel &= 0x03;
4387                 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
4388
4389                 spin_lock_irqsave(&cinfo->card_lock, flags);
4390                 cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003));   /* index channel */
4391                 cy_writeb(base_addr + (CySRER << index),
4392                           readb(base_addr + (CySRER << index)) | CyTxRdy);
4393                 spin_unlock_irqrestore(&cinfo->card_lock, flags);
4394         }
4395 }                               /* cy_start */
4396
4397 static void cy_flush_buffer(struct tty_struct *tty)
4398 {
4399         struct cyclades_port *info = tty->driver_data;
4400         struct cyclades_card *card;
4401         int channel, retval;
4402         unsigned long flags;
4403
4404 #ifdef CY_DEBUG_IO
4405         printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
4406 #endif
4407
4408         if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4409                 return;
4410
4411         card = info->card;
4412         channel = info->line - card->first_line;
4413
4414         spin_lock_irqsave(&card->card_lock, flags);
4415         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
4416         spin_unlock_irqrestore(&card->card_lock, flags);
4417
4418         if (IS_CYC_Z(*card)) {  /* If it is a Z card, flush the on-board
4419                                            buffers as well */
4420                 spin_lock_irqsave(&card->card_lock, flags);
4421                 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
4422                 if (retval != 0) {
4423                         printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
4424                                 "was %x\n", info->line, retval);
4425                 }
4426                 spin_unlock_irqrestore(&card->card_lock, flags);
4427         }
4428         tty_wakeup(tty);
4429 }                               /* cy_flush_buffer */
4430
4431 /*
4432  * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4433  */
4434 static void cy_hangup(struct tty_struct *tty)
4435 {
4436         struct cyclades_port *info = tty->driver_data;
4437
4438 #ifdef CY_DEBUG_OTHER
4439         printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
4440 #endif
4441
4442         if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4443                 return;
4444
4445         cy_flush_buffer(tty);
4446         shutdown(info);
4447         info->event = 0;
4448         info->count = 0;
4449 #ifdef CY_DEBUG_COUNT
4450         printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4451                 current->pid);
4452 #endif
4453         info->tty = NULL;
4454         info->flags &= ~ASYNC_NORMAL_ACTIVE;
4455         wake_up_interruptible(&info->open_wait);
4456 }                               /* cy_hangup */
4457
4458 /*
4459  * ---------------------------------------------------------------------
4460  * cy_init() and friends
4461  *
4462  * cy_init() is called at boot-time to initialize the serial driver.
4463  * ---------------------------------------------------------------------
4464  */
4465
4466 static int __devinit cy_init_card(struct cyclades_card *cinfo)
4467 {
4468         struct cyclades_port *info;
4469         u32 uninitialized_var(mailbox);
4470         unsigned int nports;
4471         unsigned short chip_number;
4472         int uninitialized_var(index), port;
4473
4474         spin_lock_init(&cinfo->card_lock);
4475
4476         if (IS_CYC_Z(*cinfo)) { /* Cyclades-Z */
4477                 mailbox = readl(&((struct RUNTIME_9060 __iomem *)
4478                                      cinfo->ctl_addr)->mail_box_0);
4479                 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
4480                 cinfo->intr_enabled = 0;
4481                 cinfo->nports = 0;      /* Will be correctly set later, after
4482                                            Z FW is loaded */
4483         } else {
4484                 index = cinfo->bus_index;
4485                 nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4486         }
4487
4488         cinfo->ports = kzalloc(sizeof(*cinfo->ports) * nports, GFP_KERNEL);
4489         if (cinfo->ports == NULL) {
4490                 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
4491                 cinfo->nports = 0;
4492                 return -ENOMEM;
4493         }
4494
4495         for (port = cinfo->first_line; port < cinfo->first_line + nports;
4496                         port++) {
4497                 info = &cinfo->ports[port - cinfo->first_line];
4498                 info->magic = CYCLADES_MAGIC;
4499                 info->card = cinfo;
4500                 info->line = port;
4501                 info->flags = STD_COM_FLAGS;
4502                 info->closing_wait = CLOSING_WAIT_DELAY;
4503                 info->close_delay = 5 * HZ / 10;
4504
4505                 INIT_WORK(&info->tqueue, do_softint);
4506                 init_waitqueue_head(&info->open_wait);
4507                 init_waitqueue_head(&info->close_wait);
4508                 init_completion(&info->shutdown_wait);
4509                 init_waitqueue_head(&info->delta_msr_wait);
4510
4511                 if (IS_CYC_Z(*cinfo)) {
4512                         info->type = PORT_STARTECH;
4513                         if (mailbox == ZO_V1)
4514                                 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4515                         else
4516                                 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
4517 #ifdef CONFIG_CYZ_INTR
4518                         setup_timer(&cyz_rx_full_timer[port],
4519                                 cyz_rx_restart, (unsigned long)info);
4520 #endif
4521                 } else {
4522                         info->type = PORT_CIRRUS;
4523                         info->xmit_fifo_size = CyMAX_CHAR_FIFO;
4524                         info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
4525                         info->cor2 = CyETC;
4526                         info->cor3 = 0x08;      /* _very_ small rcv threshold */
4527
4528                         chip_number = (port - cinfo->first_line) / 4;
4529                         if ((info->chip_rev = readb(cinfo->base_addr +
4530                                       (cy_chip_offset[chip_number] <<
4531                                        index) + (CyGFRCR << index))) >=
4532                             CD1400_REV_J) {
4533                                 /* It is a CD1400 rev. J or later */
4534                                 info->tbpr = baud_bpr_60[13];   /* Tx BPR */
4535                                 info->tco = baud_co_60[13];     /* Tx CO */
4536                                 info->rbpr = baud_bpr_60[13];   /* Rx BPR */
4537                                 info->rco = baud_co_60[13];     /* Rx CO */
4538                                 info->rtsdtr_inv = 1;
4539                         } else {
4540                                 info->tbpr = baud_bpr_25[13];   /* Tx BPR */
4541                                 info->tco = baud_co_25[13];     /* Tx CO */
4542                                 info->rbpr = baud_bpr_25[13];   /* Rx BPR */
4543                                 info->rco = baud_co_25[13];     /* Rx CO */
4544                                 info->rtsdtr_inv = 0;
4545                         }
4546                         info->read_status_mask = CyTIMEOUT | CySPECHAR |
4547                                 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
4548                 }
4549
4550         }
4551
4552 #ifndef CONFIG_CYZ_INTR
4553         if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) {
4554                 mod_timer(&cyz_timerlist, jiffies + 1);
4555 #ifdef CY_PCI_DEBUG
4556                 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4557 #endif
4558         }
4559 #endif
4560         return 0;
4561 }
4562
4563 /* initialize chips on Cyclom-Y card -- return number of valid
4564    chips (which is number of ports/4) */
4565 static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4566                 int index)
4567 {
4568         unsigned int chip_number;
4569         void __iomem *base_addr;
4570
4571         cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4572         /* Cy_HwReset is 0x1400 */
4573         cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4574         /* Cy_ClrIntr is 0x1800 */
4575         udelay(500L);
4576
4577         for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
4578                 base_addr =
4579                     true_base_addr + (cy_chip_offset[chip_number] << index);
4580                 mdelay(1);
4581                 if (readb(base_addr + (CyCCR << index)) != 0x00) {
4582                         /*************
4583                         printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4584                         chip_number, (unsigned long)base_addr);
4585                         *************/
4586                         return chip_number;
4587                 }
4588
4589                 cy_writeb(base_addr + (CyGFRCR << index), 0);
4590                 udelay(10L);
4591
4592                 /* The Cyclom-16Y does not decode address bit 9 and therefore
4593                    cannot distinguish between references to chip 0 and a non-
4594                    existent chip 4.  If the preceding clearing of the supposed
4595                    chip 4 GFRCR register appears at chip 0, there is no chip 4
4596                    and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4597                  */
4598                 if (chip_number == 4 && readb(true_base_addr +
4599                                 (cy_chip_offset[0] << index) +
4600                                 (CyGFRCR << index)) == 0) {
4601                         return chip_number;
4602                 }
4603
4604                 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4605                 mdelay(1);
4606
4607                 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4608                         /*
4609                            printk(" chip #%d at %#6lx is not responding ",
4610                            chip_number, (unsigned long)base_addr);
4611                            printk("(GFRCR stayed 0)\n",
4612                          */
4613                         return chip_number;
4614                 }
4615                 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4616                                 0x40) {
4617                         /*
4618                         printk(" chip #%d at %#6lx is not valid (GFRCR == "
4619                                         "%#2x)\n",
4620                                         chip_number, (unsigned long)base_addr,
4621                                         base_addr[CyGFRCR<<index]);
4622                          */
4623                         return chip_number;
4624                 }
4625                 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4626                 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4627                         /* It is a CD1400 rev. J or later */
4628                         /* Impossible to reach 5ms with this chip.
4629                            Changed to 2ms instead (f = 500 Hz). */
4630                         cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4631                 } else {
4632                         /* f = 200 Hz */
4633                         cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4634                 }
4635
4636                 /*
4637                    printk(" chip #%d at %#6lx is rev 0x%2x\n",
4638                    chip_number, (unsigned long)base_addr,
4639                    readb(base_addr+(CyGFRCR<<index)));
4640                  */
4641         }
4642         return chip_number;
4643 }                               /* cyy_init_card */
4644
4645 /*
4646  * ---------------------------------------------------------------------
4647  * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4648  * sets global variables and return the number of ISA boards found.
4649  * ---------------------------------------------------------------------
4650  */
4651 static int __init cy_detect_isa(void)
4652 {
4653 #ifdef CONFIG_ISA
4654         unsigned short cy_isa_irq, nboard;
4655         void __iomem *cy_isa_address;
4656         unsigned short i, j, cy_isa_nchan;
4657 #ifdef MODULE
4658         int isparam = 0;
4659 #endif
4660
4661         nboard = 0;
4662
4663 #ifdef MODULE
4664         /* Check for module parameters */
4665         for (i = 0; i < NR_CARDS; i++) {
4666                 if (maddr[i] || i) {
4667                         isparam = 1;
4668                         cy_isa_addresses[i] = maddr[i];
4669                 }
4670                 if (!maddr[i])
4671                         break;
4672         }
4673 #endif
4674
4675         /* scan the address table probing for Cyclom-Y/ISA boards */
4676         for (i = 0; i < NR_ISA_ADDRS; i++) {
4677                 unsigned int isa_address = cy_isa_addresses[i];
4678                 if (isa_address == 0x0000) {
4679                         return nboard;
4680                 }
4681
4682                 /* probe for CD1400... */
4683                 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
4684                 if (cy_isa_address == NULL) {
4685                         printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
4686                                         "address\n");
4687                         continue;
4688                 }
4689                 cy_isa_nchan = CyPORTS_PER_CHIP *
4690                         cyy_init_card(cy_isa_address, 0);
4691                 if (cy_isa_nchan == 0) {
4692                         iounmap(cy_isa_address);
4693                         continue;
4694                 }
4695 #ifdef MODULE
4696                 if (isparam && irq[i])
4697                         cy_isa_irq = irq[i];
4698                 else
4699 #endif
4700                         /* find out the board's irq by probing */
4701                         cy_isa_irq = detect_isa_irq(cy_isa_address);
4702                 if (cy_isa_irq == 0) {
4703                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4704                                 "IRQ could not be detected.\n",
4705                                 (unsigned long)cy_isa_address);
4706                         iounmap(cy_isa_address);
4707                         continue;
4708                 }
4709
4710                 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4711                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4712                                 "more channels are available. Change NR_PORTS "
4713                                 "in cyclades.c and recompile kernel.\n",
4714                                 (unsigned long)cy_isa_address);
4715                         iounmap(cy_isa_address);
4716                         return nboard;
4717                 }
4718                 /* fill the next cy_card structure available */
4719                 for (j = 0; j < NR_CARDS; j++) {
4720                         if (cy_card[j].base_addr == NULL)
4721                                 break;
4722                 }
4723                 if (j == NR_CARDS) {    /* no more cy_cards available */
4724                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4725                                 "more cards can be used. Change NR_CARDS in "
4726                                 "cyclades.c and recompile kernel.\n",
4727                                 (unsigned long)cy_isa_address);
4728                         iounmap(cy_isa_address);
4729                         return nboard;
4730                 }
4731
4732                 /* allocate IRQ */
4733                 if (request_irq(cy_isa_irq, cyy_interrupt,
4734                                 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4735                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4736                                 "could not allocate IRQ#%d.\n",
4737                                 (unsigned long)cy_isa_address, cy_isa_irq);
4738                         iounmap(cy_isa_address);
4739                         return nboard;
4740                 }
4741
4742                 /* set cy_card */
4743                 cy_card[j].base_addr = cy_isa_address;
4744                 cy_card[j].ctl_addr = NULL;
4745                 cy_card[j].irq = (int)cy_isa_irq;
4746                 cy_card[j].bus_index = 0;
4747                 cy_card[j].first_line = cy_next_channel;
4748                 cy_card[j].num_chips = cy_isa_nchan / 4;
4749                 if (cy_init_card(&cy_card[j])) {
4750                         cy_card[j].base_addr = NULL;
4751                         free_irq(cy_isa_irq, &cy_card[j]);
4752                         iounmap(cy_isa_address);
4753                         continue;
4754                 }
4755                 nboard++;
4756
4757                 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4758                         "%d channels starting from port %d\n",
4759                         j + 1, (unsigned long)cy_isa_address,
4760                         (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4761                         cy_isa_irq, cy_isa_nchan, cy_next_channel);
4762
4763                 for (j = cy_next_channel;
4764                                 j < cy_next_channel + cy_isa_nchan; j++)
4765                         tty_register_device(cy_serial_driver, j, NULL);
4766                 cy_next_channel += cy_isa_nchan;
4767         }
4768         return nboard;
4769 #else
4770         return 0;
4771 #endif                          /* CONFIG_ISA */
4772 }                               /* cy_detect_isa */
4773
4774 #ifdef CONFIG_PCI
4775 static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
4776 {
4777         unsigned int a;
4778
4779         for (a = 0; a < size && *str; a++, str++)
4780                 if (*str & 0x80)
4781                         return -EINVAL;
4782
4783         for (; a < size; a++, str++)
4784                 if (*str)
4785                         return -EINVAL;
4786
4787         return 0;
4788 }
4789
4790 static inline void __devinit cyz_fpga_copy(void __iomem *fpga, u8 *data,
4791                 unsigned int size)
4792 {
4793         for (; size > 0; size--) {
4794                 cy_writel(fpga, *data++);
4795                 udelay(10);
4796         }
4797 }
4798
4799 static void __devinit plx_init(struct pci_dev *pdev, int irq,
4800                 struct RUNTIME_9060 __iomem *addr)
4801 {
4802         /* Reset PLX */
4803         cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
4804         udelay(100L);
4805         cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
4806
4807         /* Reload Config. Registers from EEPROM */
4808         cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
4809         udelay(100L);
4810         cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
4811
4812         /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
4813          * the IRQ is lost and, thus, we have to re-write it to the PCI config.
4814          * registers. This will remain here until we find a permanent fix.
4815          */
4816         pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
4817 }
4818
4819 static int __devinit __cyz_load_fw(const struct firmware *fw,
4820                 const char *name, const u32 mailbox, void __iomem *base,
4821                 void __iomem *fpga)
4822 {
4823         void *ptr = fw->data;
4824         struct zfile_header *h = ptr;
4825         struct zfile_config *c, *cs;
4826         struct zfile_block *b, *bs;
4827         unsigned int a, tmp, len = fw->size;
4828 #define BAD_FW KERN_ERR "Bad firmware: "
4829         if (len < sizeof(*h)) {
4830                 printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
4831                 return -EINVAL;
4832         }
4833
4834         cs = ptr + h->config_offset;
4835         bs = ptr + h->block_offset;
4836
4837         if ((void *)(cs + h->n_config) > ptr + len ||
4838                         (void *)(bs + h->n_blocks) > ptr + len) {
4839                 printk(BAD_FW "too short");
4840                 return  -EINVAL;
4841         }
4842
4843         if (cyc_isfwstr(h->name, sizeof(h->name)) ||
4844                         cyc_isfwstr(h->date, sizeof(h->date))) {
4845                 printk(BAD_FW "bad formatted header string\n");
4846                 return -EINVAL;
4847         }
4848
4849         if (strncmp(name, h->name, sizeof(h->name))) {
4850                 printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
4851                 return -EINVAL;
4852         }
4853
4854         tmp = 0;
4855         for (c = cs; c < cs + h->n_config; c++) {
4856                 for (a = 0; a < c->n_blocks; a++)
4857                         if (c->block_list[a] > h->n_blocks) {
4858                                 printk(BAD_FW "bad block ref number in cfgs\n");
4859                                 return -EINVAL;
4860                         }
4861                 if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
4862                         tmp++;
4863         }
4864         if (!tmp) {
4865                 printk(BAD_FW "nothing appropriate\n");
4866                 return -EINVAL;
4867         }
4868
4869         for (b = bs; b < bs + h->n_blocks; b++)
4870                 if (b->file_offset + b->size > len) {
4871                         printk(BAD_FW "bad block data offset\n");
4872                         return -EINVAL;
4873                 }
4874
4875         /* everything is OK, let's seek'n'load it */
4876         for (c = cs; c < cs + h->n_config; c++)
4877                 if (c->mailbox == mailbox && c->function == 0)
4878                         break;
4879
4880         for (a = 0; a < c->n_blocks; a++) {
4881                 b = &bs[c->block_list[a]];
4882                 if (b->type == ZBLOCK_FPGA) {
4883                         if (fpga != NULL)
4884                                 cyz_fpga_copy(fpga, ptr + b->file_offset,
4885                                                 b->size);
4886                 } else {
4887                         if (base != NULL)
4888                                 memcpy_toio(base + b->ram_offset,
4889                                                ptr + b->file_offset, b->size);
4890                 }
4891         }
4892 #undef BAD_FW
4893         return 0;
4894 }
4895
4896 static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
4897                 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
4898 {
4899         const struct firmware *fw;
4900         struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
4901         struct CUSTOM_REG __iomem *cust = base_addr;
4902         struct ZFW_CTRL __iomem *pt_zfwctrl;
4903         void __iomem *tmp;
4904         u32 mailbox, status;
4905         unsigned int i;
4906         int retval;
4907
4908         retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
4909         if (retval) {
4910                 dev_err(&pdev->dev, "can't get firmware\n");
4911                 goto err;
4912         }
4913
4914         /* Check whether the firmware is already loaded and running. If
4915            positive, skip this board */
4916         if (Z_FPGA_LOADED(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
4917                 u32 cntval = readl(base_addr + 0x190);
4918
4919                 udelay(100);
4920                 if (cntval != readl(base_addr + 0x190)) {
4921                         /* FW counter is working, FW is running */
4922                         dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
4923                                         "Skipping board.\n");
4924                         retval = 0;
4925                         goto err_rel;
4926                 }
4927         }
4928
4929         /* start boot */
4930         cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
4931                         ~0x00030800UL);
4932
4933         mailbox = readl(&ctl_addr->mail_box_0);
4934
4935         if (mailbox == 0 || Z_FPGA_LOADED(ctl_addr)) {
4936                 /* stops CPU and set window to beginning of RAM */
4937                 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4938                 cy_writel(&cust->cpu_stop, 0);
4939                 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4940                 udelay(100);
4941         }
4942
4943         plx_init(pdev, irq, ctl_addr);
4944
4945         if (mailbox != 0) {
4946                 /* load FPGA */
4947                 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
4948                                 base_addr);
4949                 if (retval)
4950                         goto err_rel;
4951                 if (!Z_FPGA_LOADED(ctl_addr)) {
4952                         dev_err(&pdev->dev, "fw upload successful, but fw is "
4953                                         "not loaded\n");
4954                         goto err_rel;
4955                 }
4956         }
4957
4958         /* stops CPU and set window to beginning of RAM */
4959         cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4960         cy_writel(&cust->cpu_stop, 0);
4961         cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4962         udelay(100);
4963
4964         /* clear memory */
4965         for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4966                 cy_writeb(tmp, 255);
4967         if (mailbox != 0) {
4968                 /* set window to last 512K of RAM */
4969                 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
4970                 //sleep(1);
4971                 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
4972                         cy_writeb(tmp, 255);
4973                 /* set window to beginning of RAM */
4974                 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4975                 //sleep(1);
4976         }
4977
4978         retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
4979         release_firmware(fw);
4980         if (retval)
4981                 goto err;
4982
4983         /* finish boot and start boards */
4984         cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
4985         cy_writel(&cust->cpu_start, 0);
4986         cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
4987         i = 0;
4988         while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
4989                 msleep(100);
4990         if (status != ZFIRM_ID) {
4991                 if (status == ZFIRM_HLT) {
4992                         dev_err(&pdev->dev, "you need an external power supply "
4993                                 "for this number of ports. Firmware halted and "
4994                                 "board reset.\n");
4995                         retval = -EIO;
4996                         goto err;
4997                 }
4998                 dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
4999                                 "some more time\n", status);
5000                 while ((status = readl(&fid->signature)) != ZFIRM_ID &&
5001                                 i++ < 200)
5002                         msleep(100);
5003                 if (status != ZFIRM_ID) {
5004                         dev_err(&pdev->dev, "Board not started in 20 seconds! "
5005                                         "Giving up. (fid->signature = 0x%x)\n",
5006                                         status);
5007                         dev_info(&pdev->dev, "*** Warning ***: if you are "
5008                                 "upgrading the FW, please power cycle the "
5009                                 "system before loading the new FW to the "
5010                                 "Cyclades-Z.\n");
5011
5012                         if (Z_FPGA_LOADED(ctl_addr))
5013                                 plx_init(pdev, irq, ctl_addr);
5014
5015                         retval = -EIO;
5016                         goto err;
5017                 }
5018                 dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
5019                                 i / 10);
5020         }
5021         pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
5022
5023         dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
5024                         base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
5025                         base_addr + readl(&fid->zfwctrl_addr));
5026
5027         dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
5028                 readl(&pt_zfwctrl->board_ctrl.fw_version),
5029                 readl(&pt_zfwctrl->board_ctrl.n_channel));
5030
5031         if (readl(&pt_zfwctrl->board_ctrl.n_channel) == 0) {
5032                 dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
5033                         "check the connection between the Z host card and the "
5034                         "serial expanders.\n");
5035
5036                 if (Z_FPGA_LOADED(ctl_addr))
5037                         plx_init(pdev, irq, ctl_addr);
5038
5039                 dev_info(&pdev->dev, "Null number of ports detected. Board "
5040                                 "reset.\n");
5041                 retval = 0;
5042                 goto err;
5043         }
5044
5045         cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
5046         cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
5047
5048         /*
5049            Early firmware failed to start looking for commands.
5050            This enables firmware interrupts for those commands.
5051          */
5052         cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
5053                         (1 << 17));
5054         cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
5055                         0x00030800UL);
5056
5057         plx_init(pdev, irq, ctl_addr);
5058
5059         return 0;
5060 err_rel:
5061         release_firmware(fw);
5062 err:
5063         return retval;
5064 }
5065
5066 static int __devinit cy_pci_probe(struct pci_dev *pdev,
5067                 const struct pci_device_id *ent)
5068 {
5069         void __iomem *addr0 = NULL, *addr2 = NULL;
5070         char *card_name = NULL;
5071         u32 mailbox;
5072         unsigned int device_id, nchan = 0, card_no, i;
5073         unsigned char plx_ver;
5074         int retval, irq;
5075
5076         retval = pci_enable_device(pdev);
5077         if (retval) {
5078                 dev_err(&pdev->dev, "cannot enable device\n");
5079                 goto err;
5080         }
5081
5082         /* read PCI configuration area */
5083         irq = pdev->irq;
5084         device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
5085
5086 #if defined(__alpha__)
5087         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) {   /* below 1M? */
5088                 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
5089                         "addresses on Alpha systems.\n");
5090                 retval = -EIO;
5091                 goto err_dis;
5092         }
5093 #endif
5094         if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
5095                 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
5096                         "addresses\n");
5097                 retval = -EIO;
5098                 goto err_dis;
5099         }
5100
5101         if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
5102                 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
5103                                 "it...\n");
5104                 pdev->resource[2].flags &= ~IORESOURCE_IO;
5105         }
5106
5107         retval = pci_request_regions(pdev, "cyclades");
5108         if (retval) {
5109                 dev_err(&pdev->dev, "failed to reserve resources\n");
5110                 goto err_dis;
5111         }
5112
5113         retval = -EIO;
5114         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5115                         device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5116                 card_name = "Cyclom-Y";
5117
5118                 addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
5119                 if (addr0 == NULL) {
5120                         dev_err(&pdev->dev, "can't remap ctl region\n");
5121                         goto err_reg;
5122                 }
5123                 addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
5124                 if (addr2 == NULL) {
5125                         dev_err(&pdev->dev, "can't remap base region\n");
5126                         goto err_unmap;
5127                 }
5128
5129                 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
5130                 if (nchan == 0) {
5131                         dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
5132                                         "Serial-Modules\n");
5133                         return -EIO;
5134                 }
5135         } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
5136                 struct RUNTIME_9060 __iomem *ctl_addr;
5137
5138                 ctl_addr = addr0 = pci_iomap(pdev, 0, CyPCI_Zctl);
5139                 if (addr0 == NULL) {
5140                         dev_err(&pdev->dev, "can't remap ctl region\n");
5141                         goto err_reg;
5142                 }
5143
5144                 /* Disable interrupts on the PLX before resetting it */
5145                 cy_writew(addr0 + 0x68, readw(addr0 + 0x68) & ~0x0900);
5146
5147                 plx_init(pdev, irq, addr0);
5148
5149                 mailbox = (u32)readl(&ctl_addr->mail_box_0);
5150
5151                 addr2 = pci_iomap(pdev, 2, mailbox == ZE_V1 ?
5152                                 CyPCI_Ze_win : CyPCI_Zwin);
5153                 if (addr2 == NULL) {
5154                         dev_err(&pdev->dev, "can't remap base region\n");
5155                         goto err_unmap;
5156                 }
5157
5158                 if (mailbox == ZE_V1) {
5159                         card_name = "Cyclades-Ze";
5160
5161                         readl(&ctl_addr->mail_box_0);
5162                         nchan = ZE_V1_NPORTS;
5163                 } else {
5164                         card_name = "Cyclades-8Zo";
5165
5166 #ifdef CY_PCI_DEBUG
5167                         if (mailbox == ZO_V1) {
5168                                 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
5169                                 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
5170                                         "id %lx, ver %lx\n", (ulong)(0xff &
5171                                         readl(&((struct CUSTOM_REG *)addr2)->
5172                                                 fpga_id)), (ulong)(0xff &
5173                                         readl(&((struct CUSTOM_REG *)addr2)->
5174                                                 fpga_version)));
5175                                 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
5176                         } else {
5177                                 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
5178                                         "Cyclades-Z board.  FPGA not loaded\n");
5179                         }
5180 #endif
5181                         /* The following clears the firmware id word.  This
5182                            ensures that the driver will not attempt to talk to
5183                            the board until it has been properly initialized.
5184                          */
5185                         if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5186                                 cy_writel(addr2 + ID_ADDRESS, 0L);
5187
5188                         retval = cyz_load_fw(pdev, addr2, addr0, irq);
5189                         if (retval)
5190                                 goto err_unmap;
5191                         /* This must be a Cyclades-8Zo/PCI.  The extendable
5192                            version will have a different device_id and will
5193                            be allocated its maximum number of ports. */
5194                         nchan = 8;
5195                 }
5196         }
5197
5198         if ((cy_next_channel + nchan) > NR_PORTS) {
5199                 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5200                         "channels are available. Change NR_PORTS in "
5201                         "cyclades.c and recompile kernel.\n");
5202                 goto err_unmap;
5203         }
5204         /* fill the next cy_card structure available */
5205         for (card_no = 0; card_no < NR_CARDS; card_no++) {
5206                 if (cy_card[card_no].base_addr == NULL)
5207                         break;
5208         }
5209         if (card_no == NR_CARDS) {      /* no more cy_cards available */
5210                 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5211                         "more cards can be used. Change NR_CARDS in "
5212                         "cyclades.c and recompile kernel.\n");
5213                 goto err_unmap;
5214         }
5215
5216         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5217                         device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5218                 /* allocate IRQ */
5219                 retval = request_irq(irq, cyy_interrupt,
5220                                 IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
5221                 if (retval) {
5222                         dev_err(&pdev->dev, "could not allocate IRQ\n");
5223                         goto err_unmap;
5224                 }
5225                 cy_card[card_no].num_chips = nchan / 4;
5226         } else {
5227 #ifdef CONFIG_CYZ_INTR
5228                 /* allocate IRQ only if board has an IRQ */
5229                 if (irq != 0 && irq != 255) {
5230                         retval = request_irq(irq, cyz_interrupt,
5231                                         IRQF_SHARED, "Cyclades-Z",
5232                                         &cy_card[card_no]);
5233                         if (retval) {
5234                                 dev_err(&pdev->dev, "could not allocate IRQ\n");
5235                                 goto err_unmap;
5236                         }
5237                 }
5238 #endif                          /* CONFIG_CYZ_INTR */
5239                 cy_card[card_no].num_chips = -1;
5240         }
5241
5242         /* set cy_card */
5243         cy_card[card_no].base_addr = addr2;
5244         cy_card[card_no].ctl_addr = addr0;
5245         cy_card[card_no].irq = irq;
5246         cy_card[card_no].bus_index = 1;
5247         cy_card[card_no].first_line = cy_next_channel;
5248         retval = cy_init_card(&cy_card[card_no]);
5249         if (retval)
5250                 goto err_null;
5251
5252         pci_set_drvdata(pdev, &cy_card[card_no]);
5253
5254         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
5255                         device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
5256                 /* enable interrupts in the PCI interface */
5257                 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
5258                 switch (plx_ver) {
5259                 case PLX_9050:
5260
5261                         cy_writeb(addr0 + 0x4c, 0x43);
5262                         break;
5263
5264                 case PLX_9060:
5265                 case PLX_9080:
5266                 default:        /* Old boards, use PLX_9060 */
5267                         plx_init(pdev, irq, addr0);
5268                         cy_writew(addr0 + 0x68, readw(addr0 + 0x68) | 0x0900);
5269                         break;
5270                 }
5271         }
5272
5273         dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
5274                 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
5275         for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
5276                 tty_register_device(cy_serial_driver, i, &pdev->dev);
5277         cy_next_channel += nchan;
5278
5279         return 0;
5280 err_null:
5281         cy_card[card_no].base_addr = NULL;
5282         free_irq(irq, &cy_card[card_no]);
5283 err_unmap:
5284         pci_iounmap(pdev, addr0);
5285         if (addr2)
5286                 pci_iounmap(pdev, addr2);
5287 err_reg:
5288         pci_release_regions(pdev);
5289 err_dis:
5290         pci_disable_device(pdev);
5291 err:
5292         return retval;
5293 }
5294
5295 static void __devexit cy_pci_remove(struct pci_dev *pdev)
5296 {
5297         struct cyclades_card *cinfo = pci_get_drvdata(pdev);
5298         unsigned int i;
5299
5300         /* non-Z with old PLX */
5301         if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5302                         PLX_9050)
5303                 cy_writeb(cinfo->ctl_addr + 0x4c, 0);
5304         else
5305 #ifndef CONFIG_CYZ_INTR
5306                 if (!IS_CYC_Z(*cinfo))
5307 #endif
5308                 cy_writew(cinfo->ctl_addr + 0x68,
5309                                 readw(cinfo->ctl_addr + 0x68) & ~0x0900);
5310
5311         pci_iounmap(pdev, cinfo->base_addr);
5312         if (cinfo->ctl_addr)
5313                 pci_iounmap(pdev, cinfo->ctl_addr);
5314         if (cinfo->irq
5315 #ifndef CONFIG_CYZ_INTR
5316                 && !IS_CYC_Z(*cinfo)
5317 #endif /* CONFIG_CYZ_INTR */
5318                 )
5319                 free_irq(cinfo->irq, cinfo);
5320         pci_release_regions(pdev);
5321
5322         cinfo->base_addr = NULL;
5323         for (i = cinfo->first_line; i < cinfo->first_line +
5324                         cinfo->nports; i++)
5325                 tty_unregister_device(cy_serial_driver, i);
5326         cinfo->nports = 0;
5327         kfree(cinfo->ports);
5328 }
5329
5330 static struct pci_driver cy_pci_driver = {
5331         .name = "cyclades",
5332         .id_table = cy_pci_dev_id,
5333         .probe = cy_pci_probe,
5334         .remove = __devexit_p(cy_pci_remove)
5335 };
5336 #endif
5337
5338 static int
5339 cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5340                 int *eof, void *data)
5341 {
5342         struct cyclades_port *info;
5343         unsigned int i, j;
5344         int len = 0;
5345         off_t begin = 0;
5346         off_t pos = 0;
5347         int size;
5348         __u32 cur_jifs = jiffies;
5349
5350         size = sprintf(buf, "Dev TimeOpen   BytesOut  IdleOut    BytesIn   "
5351                         "IdleIn  Overruns  Ldisc\n");
5352
5353         pos += size;
5354         len += size;
5355
5356         /* Output one line for each known port */
5357         for (i = 0; i < NR_CARDS; i++)
5358                 for (j = 0; j < cy_card[i].nports; j++) {
5359                         info = &cy_card[i].ports[j];
5360
5361                         if (info->count)
5362                                 size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
5363                                         "%10lu %8lu %9lu %6ld\n", info->line,
5364                                         (cur_jifs - info->idle_stats.in_use) /
5365                                         HZ, info->idle_stats.xmit_bytes,
5366                                         (cur_jifs - info->idle_stats.xmit_idle)/
5367                                         HZ, info->idle_stats.recv_bytes,
5368                                         (cur_jifs - info->idle_stats.recv_idle)/
5369                                         HZ, info->idle_stats.overruns,
5370                                         (long)info->tty->ldisc.num);
5371                         else
5372                                 size = sprintf(buf + len, "%3d %8lu %10lu %8lu "
5373                                         "%10lu %8lu %9lu %6ld\n",
5374                                         info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5375                         len += size;
5376                         pos = begin + len;
5377
5378                         if (pos < offset) {
5379                                 len = 0;
5380                                 begin = pos;
5381                         }
5382                         if (pos > offset + length)
5383                                 goto done;
5384                 }
5385         *eof = 1;
5386 done:
5387         *start = buf + (offset - begin);        /* Start of wanted data */
5388         len -= (offset - begin);        /* Start slop */
5389         if (len > length)
5390                 len = length;   /* Ending slop */
5391         if (len < 0)
5392                 len = 0;
5393         return len;
5394 }
5395
5396 /* The serial driver boot-time initialization code!
5397     Hardware I/O ports are mapped to character special devices on a
5398     first found, first allocated manner.  That is, this code searches
5399     for Cyclom cards in the system.  As each is found, it is probed
5400     to discover how many chips (and thus how many ports) are present.
5401     These ports are mapped to the tty ports 32 and upward in monotonic
5402     fashion.  If an 8-port card is replaced with a 16-port card, the
5403     port mapping on a following card will shift.
5404
5405     This approach is different from what is used in the other serial
5406     device driver because the Cyclom is more properly a multiplexer,
5407     not just an aggregation of serial ports on one card.
5408
5409     If there are more cards with more ports than have been
5410     statically allocated above, a warning is printed and the
5411     extra ports are ignored.
5412  */
5413
5414 static const struct tty_operations cy_ops = {
5415         .open = cy_open,
5416         .close = cy_close,
5417         .write = cy_write,
5418         .put_char = cy_put_char,
5419         .flush_chars = cy_flush_chars,
5420         .write_room = cy_write_room,
5421         .chars_in_buffer = cy_chars_in_buffer,
5422         .flush_buffer = cy_flush_buffer,
5423         .ioctl = cy_ioctl,
5424         .throttle = cy_throttle,
5425         .unthrottle = cy_unthrottle,
5426         .set_termios = cy_set_termios,
5427         .stop = cy_stop,
5428         .start = cy_start,
5429         .hangup = cy_hangup,
5430         .break_ctl = cy_break,
5431         .wait_until_sent = cy_wait_until_sent,
5432         .read_proc = cyclades_get_proc_info,
5433         .tiocmget = cy_tiocmget,
5434         .tiocmset = cy_tiocmset,
5435 };
5436
5437 static int __init cy_init(void)
5438 {
5439         unsigned int nboards;
5440         int retval = -ENOMEM;
5441
5442         cy_serial_driver = alloc_tty_driver(NR_PORTS);
5443         if (!cy_serial_driver)
5444                 goto err;
5445
5446         printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5447                         __DATE__, __TIME__);
5448
5449         /* Initialize the tty_driver structure */
5450
5451         cy_serial_driver->owner = THIS_MODULE;
5452         cy_serial_driver->driver_name = "cyclades";
5453         cy_serial_driver->name = "ttyC";
5454         cy_serial_driver->major = CYCLADES_MAJOR;
5455         cy_serial_driver->minor_start = 0;
5456         cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5457         cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5458         cy_serial_driver->init_termios = tty_std_termios;
5459         cy_serial_driver->init_termios.c_cflag =
5460             B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5461         cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
5462         tty_set_operations(cy_serial_driver, &cy_ops);
5463
5464         retval = tty_register_driver(cy_serial_driver);
5465         if (retval) {
5466                 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5467                 goto err_frtty;
5468         }
5469
5470         /* the code below is responsible to find the boards. Each different
5471            type of board has its own detection routine. If a board is found,
5472            the next cy_card structure available is set by the detection
5473            routine. These functions are responsible for checking the
5474            availability of cy_card and cy_port data structures and updating
5475            the cy_next_channel. */
5476
5477         /* look for isa boards */
5478         nboards = cy_detect_isa();
5479
5480 #ifdef CONFIG_PCI
5481         /* look for pci boards */
5482         retval = pci_register_driver(&cy_pci_driver);
5483         if (retval && !nboards)
5484                 goto err_unr;
5485 #endif
5486
5487         return 0;
5488 err_unr:
5489         tty_unregister_driver(cy_serial_driver);
5490 err_frtty:
5491         put_tty_driver(cy_serial_driver);
5492 err:
5493         return retval;
5494 }                               /* cy_init */
5495
5496 static void __exit cy_cleanup_module(void)
5497 {
5498         struct cyclades_card *card;
5499         int i, e1;
5500
5501 #ifndef CONFIG_CYZ_INTR
5502         del_timer_sync(&cyz_timerlist);
5503 #endif /* CONFIG_CYZ_INTR */
5504
5505         if ((e1 = tty_unregister_driver(cy_serial_driver)))
5506                 printk(KERN_ERR "failed to unregister Cyclades serial "
5507                                 "driver(%d)\n", e1);
5508
5509 #ifdef CONFIG_PCI
5510         pci_unregister_driver(&cy_pci_driver);
5511 #endif
5512
5513         for (i = 0; i < NR_CARDS; i++) {
5514                 card = &cy_card[i];
5515                 if (card->base_addr) {
5516                         /* clear interrupt */
5517                         cy_writeb(card->base_addr + Cy_ClrIntr, 0);
5518                         iounmap(card->base_addr);
5519                         if (card->ctl_addr)
5520                                 iounmap(card->ctl_addr);
5521                         if (card->irq
5522 #ifndef CONFIG_CYZ_INTR
5523                                 && !IS_CYC_Z(*card)
5524 #endif /* CONFIG_CYZ_INTR */
5525                                 )
5526                                 free_irq(card->irq, card);
5527                         for (e1 = card->first_line;
5528                                         e1 < card->first_line +
5529                                         card->nports; e1++)
5530                                 tty_unregister_device(cy_serial_driver, e1);
5531                         kfree(card->ports);
5532                 }
5533         }
5534
5535         put_tty_driver(cy_serial_driver);
5536 } /* cy_cleanup_module */
5537
5538 module_init(cy_init);
5539 module_exit(cy_cleanup_module);
5540
5541 MODULE_LICENSE("GPL");
5542 MODULE_VERSION(CY_VERSION);