drivers/usb/serial/io_ti.c

   1 /*
   2  * Edgeport USB Serial Converter driver
   3  *
   4  * Copyright (C) 2000-2002 Inside Out Networks, All rights reserved.
   5  * Copyright (C) 2001-2002 Greg Kroah-Hartman <greg@kroah.com>
   6  *
   7  *      This program is free software; you can redistribute it and/or modify
   8  *      it under the terms of the GNU General Public License as published by
   9  *      the Free Software Foundation; either version 2 of the License, or
  10  *      (at your option) any later version.
  11  *
  12  * Supports the following devices:
  13  *      EP/1 EP/2 EP/4 EP/21 EP/22 EP/221 EP/42 EP/421 WATCHPORT
  14  *
  15  * For questions or problems with this driver, contact Inside Out
  16  * Networks technical support, or Peter Berger <pberger@brimson.com>,
  17  * or Al Borchers <alborchers@steinerpoint.com>.
  18  *
  19  * Version history:
  20  *
  21  *      July 11, 2002   Removed 4 port device structure since all TI UMP
  22  *                      chips have only 2 ports
  23  *                      David Iacovelli (davidi@ionetworks.com)
  24  *
  25  */
  26
  27 #include <linux/kernel.h>
  28 #include <linux/jiffies.h>
  29 #include <linux/errno.h>
  30 #include <linux/init.h>
  31 #include <linux/slab.h>
  32 #include <linux/tty.h>
  33 #include <linux/tty_driver.h>
  34 #include <linux/tty_flip.h>
  35 #include <linux/module.h>
  36 #include <linux/spinlock.h>
  37 #include <linux/mutex.h>
  38 #include <linux/serial.h>
  39 #include <linux/ioctl.h>
  40 #include <asm/uaccess.h>
  41 #include <linux/usb.h>
  42 #include <linux/usb/serial.h>
  43
  44 #include "io_16654.h"
  45 #include "io_usbvend.h"
  46 #include "io_ti.h"
  47
  48 /*
  49  * Version Information
  50  */
  51 #define DRIVER_VERSION "v0.7mode043006"
  52 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com> and David Iacovelli"
  53 #define DRIVER_DESC "Edgeport USB Serial Driver"
  54
  55
  56 /* firmware image code */
  57 #define IMAGE_VERSION_NAME      PagableOperationalCodeImageVersion
  58 #define IMAGE_ARRAY_NAME        PagableOperationalCodeImage
  59 #define IMAGE_SIZE              PagableOperationalCodeSize
  60 #include "io_fw_down3.h"        /* Define array OperationalCodeImage[] */
  61
  62 #define EPROM_PAGE_SIZE         64
  63
  64
  65 struct edgeport_uart_buf_desc {
  66         __u32 count;            // Number of bytes currently in buffer
  67 };
  68
  69 /* different hardware types */
  70 #define HARDWARE_TYPE_930       0
  71 #define HARDWARE_TYPE_TIUMP     1
  72
  73 // IOCTL_PRIVATE_TI_GET_MODE Definitions
  74 #define TI_MODE_CONFIGURING     0   // Device has not entered start device
  75 #define TI_MODE_BOOT            1   // Staying in boot mode
  76 #define TI_MODE_DOWNLOAD        2   // Made it to download mode
  77 #define TI_MODE_TRANSITIONING   3   // Currently in boot mode but transitioning to download mode
  78
  79 /* read urb state */
  80 #define EDGE_READ_URB_RUNNING   0
  81 #define EDGE_READ_URB_STOPPING  1
  82 #define EDGE_READ_URB_STOPPED   2
  83
  84 #define EDGE_LOW_LATENCY        1
  85 #define EDGE_CLOSING_WAIT       4000    /* in .01 sec */
  86
  87 #define EDGE_OUT_BUF_SIZE       1024
  88
  89
  90 /* Product information read from the Edgeport */
  91 struct product_info
  92 {
  93         int     TiMode;                 // Current TI Mode
  94         __u8    hardware_type;          // Type of hardware
  95 } __attribute__((packed));
  96
  97 /* circular buffer */
  98 struct edge_buf {
  99         unsigned int    buf_size;
 100         char            *buf_buf;
 101         char            *buf_get;
 102         char            *buf_put;
 103 };
 104
 105 struct edgeport_port {
 106         __u16 uart_base;
 107         __u16 dma_address;
 108         __u8 shadow_msr;
 109         __u8 shadow_mcr;
 110         __u8 shadow_lsr;
 111         __u8 lsr_mask;
 112         __u32 ump_read_timeout;         /* Number of miliseconds the UMP will
 113                                            wait without data before completing
 114                                            a read short */
 115         int baud_rate;
 116         int close_pending;
 117         int lsr_event;
 118         struct edgeport_uart_buf_desc tx;
 119         struct async_icount     icount;
 120         wait_queue_head_t       delta_msr_wait; /* for handling sleeping while
 121                                                    waiting for msr change to
 122                                                    happen */
 123         struct edgeport_serial  *edge_serial;
 124         struct usb_serial_port  *port;
 125         __u8 bUartMode;         /* Port type, 0: RS232, etc. */
 126         spinlock_t ep_lock;
 127         int ep_read_urb_state;
 128         int ep_write_urb_in_use;
 129         struct edge_buf *ep_out_buf;
 130 };
 131
 132 struct edgeport_serial {
 133         struct product_info product_info;
 134         u8 TI_I2C_Type;                 // Type of I2C in UMP
 135         u8 TiReadI2C;                   // Set to TRUE if we have read the I2c in Boot Mode
 136         struct mutex es_lock;
 137         int num_ports_open;
 138         struct usb_serial *serial;
 139 };
 140
 141
 142 /* Devices that this driver supports */
 143 static struct usb_device_id edgeport_1port_id_table [] = {
 144         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
 145         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
 146         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
 147         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
 148         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
 149         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
 150         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
 151         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
 152         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
 153         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
 154         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
 155         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
 156         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
 157         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
 158         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
 159         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
 160         { }
 161 };
 162
 163 static struct usb_device_id edgeport_2port_id_table [] = {
 164         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
 165         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
 166         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
 167         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
 168         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
 169         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
 170         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
 171         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
 172         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
 173         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
 174         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
 175         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
 176         /* The 4, 8 and 16 port devices show up as multiple 2 port devices */
 177         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
 178         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
 179         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
 180         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
 181         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
 182         { }
 183 };
 184
 185 /* Devices that this driver supports */
 186 static struct usb_device_id id_table_combined [] = {
 187         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_1) },
 188         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1) },
 189         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_TI3410_EDGEPORT_1I) },
 190         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROXIMITY) },
 191         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOTION) },
 192         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_MOISTURE) },
 193         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_TEMPERATURE) },
 194         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_HUMIDITY) },
 195         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_POWER) },
 196         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_LIGHT) },
 197         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_RADIATION) },
 198         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_DISTANCE) },
 199         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_ACCELERATION) },
 200         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_WP_PROX_DIST) },
 201         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_HP4CD) },
 202         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_PLUS_PWR_PCI) },
 203         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2) },
 204         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2C) },
 205         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_2I) },
 206         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_421) },
 207         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21) },
 208         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_42) },
 209         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4) },
 210         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4I) },
 211         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22I) },
 212         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_221C) },
 213         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_22C) },
 214         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_21C) },
 215         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_4S) },
 216         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8) },
 217         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_8S) },
 218         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416) },
 219         { USB_DEVICE(USB_VENDOR_ID_ION, ION_DEVICE_ID_TI_EDGEPORT_416B) },
 220         { }
 221 };
 222
 223 MODULE_DEVICE_TABLE (usb, id_table_combined);
 224
 225 static struct usb_driver io_driver = {
 226         .name =         "io_ti",
 227         .probe =        usb_serial_probe,
 228         .disconnect =   usb_serial_disconnect,
 229         .id_table =     id_table_combined,
 230         .no_dynamic_id =        1,
 231 };
 232
 233
 234 static struct EDGE_FIRMWARE_VERSION_INFO OperationalCodeImageVersion;
 235
 236 static int debug;
 237
 238 static int TIStayInBootMode = 0;
 239 static int low_latency = EDGE_LOW_LATENCY;
 240 static int closing_wait = EDGE_CLOSING_WAIT;
 241 static int ignore_cpu_rev = 0;
 242 static int default_uart_mode = 0;       /* RS232 */
 243
 244
 245 static void edge_tty_recv(struct device *dev, struct tty_struct *tty, unsigned char *data, int length);
 246
 247 static void stop_read(struct edgeport_port *edge_port);
 248 static int restart_read(struct edgeport_port *edge_port);
 249
 250 static void edge_set_termios (struct usb_serial_port *port, struct ktermios *old_termios);
 251 static void edge_send(struct usb_serial_port *port);
 252
 253 /* sysfs attributes */
 254 static int edge_create_sysfs_attrs(struct usb_serial_port *port);
 255 static int edge_remove_sysfs_attrs(struct usb_serial_port *port);
 256
 257 /* circular buffer */
 258 static struct edge_buf *edge_buf_alloc(unsigned int size);
 259 static void edge_buf_free(struct edge_buf *eb);
 260 static void edge_buf_clear(struct edge_buf *eb);
 261 static unsigned int edge_buf_data_avail(struct edge_buf *eb);
 262 static unsigned int edge_buf_space_avail(struct edge_buf *eb);
 263 static unsigned int edge_buf_put(struct edge_buf *eb, const char *buf,
 264         unsigned int count);
 265 static unsigned int edge_buf_get(struct edge_buf *eb, char *buf,
 266         unsigned int count);
 267
 268
 269 static int TIReadVendorRequestSync (struct usb_device *dev,
 270                                 __u8            request,
 271                                 __u16           value,
 272                                 __u16           index,
 273                                 u8              *data,
 274                                 int             size)
 275 {
 276         int status;
 277
 278         status = usb_control_msg (dev,
 279                                 usb_rcvctrlpipe(dev, 0),
 280                                 request,
 281                                 (USB_TYPE_VENDOR |
 282                                  USB_RECIP_DEVICE |
 283                                  USB_DIR_IN),
 284                                 value,
 285                                 index,
 286                                 data,
 287                                 size,
 288                                 1000);
 289         if (status < 0)
 290                 return status;
 291         if (status != size) {
 292                 dbg ("%s - wanted to write %d, but only wrote %d",
 293                      __FUNCTION__, size, status);
 294                 return -ECOMM;
 295         }
 296         return 0;
 297 }
 298
 299 static int TISendVendorRequestSync (struct usb_device *dev,
 300                                 __u8            request,
 301                                 __u16           value,
 302                                 __u16           index,
 303                                 u8              *data,
 304                                 int             size)
 305 {
 306         int status;
 307
 308         status = usb_control_msg (dev,
 309                                 usb_sndctrlpipe(dev, 0),
 310                                 request,
 311                                 (USB_TYPE_VENDOR |
 312                                  USB_RECIP_DEVICE |
 313                                  USB_DIR_OUT),
 314                                 value,
 315                                 index,
 316                                 data,
 317                                 size,
 318                                 1000);
 319         if (status < 0)
 320                 return status;
 321         if (status != size) {
 322                 dbg ("%s - wanted to write %d, but only wrote %d",
 323                      __FUNCTION__, size, status);
 324                 return -ECOMM;
 325         }
 326         return 0;
 327 }
 328
 329 static int TIWriteCommandSync (struct usb_device *dev, __u8 command,
 330                                 __u8 moduleid, __u16 value, u8 *data,
 331                                 int size)
 332 {
 333         return TISendVendorRequestSync (dev,
 334                                           command,                      // Request
 335                                           value,                        // wValue
 336                                           moduleid,                     // wIndex
 337                                           data,                         // TransferBuffer
 338                                           size);                        // TransferBufferLength
 339
 340 }
 341
 342 /* clear tx/rx buffers and fifo in TI UMP */
 343 static int TIPurgeDataSync (struct usb_serial_port *port, __u16 mask)
 344 {
 345         int port_number = port->number - port->serial->minor;
 346
 347         dbg ("%s - port %d, mask %x", __FUNCTION__, port_number, mask);
 348
 349         return TIWriteCommandSync (port->serial->dev,
 350                                         UMPC_PURGE_PORT,
 351                                         (__u8)(UMPM_UART1_PORT + port_number),
 352                                         mask,
 353                                         NULL,
 354                                         0);
 355 }
 356
 357 /**
 358  * TIReadDownloadMemory - Read edgeport memory from TI chip
 359  * @dev: usb device pointer
 360  * @start_address: Device CPU address at which to read
 361  * @length: Length of above data
 362  * @address_type: Can read both XDATA and I2C
 363  * @buffer: pointer to input data buffer
 364  */
 365 static int TIReadDownloadMemory(struct usb_device *dev, int start_address,
 366                                 int length, __u8 address_type, __u8 *buffer)
 367 {
 368         int status = 0;
 369         __u8 read_length;
 370         __be16 be_start_address;
 371
 372         dbg ("%s - @ %x for %d", __FUNCTION__, start_address, length);
 373
 374         /* Read in blocks of 64 bytes
 375          * (TI firmware can't handle more than 64 byte reads)
 376          */
 377         while (length) {
 378                 if (length > 64)
 379                         read_length= 64;
 380                 else
 381                         read_length = (__u8)length;
 382
 383                 if (read_length > 1) {
 384                         dbg ("%s - @ %x for %d", __FUNCTION__,
 385                              start_address, read_length);
 386                 }
 387                 be_start_address = cpu_to_be16 (start_address);
 388                 status = TIReadVendorRequestSync (dev,
 389                                                   UMPC_MEMORY_READ,     // Request
 390                                                   (__u16)address_type,  // wValue (Address type)
 391                                                   (__force __u16)be_start_address,      // wIndex (Address to read)
 392                                                   buffer,               // TransferBuffer
 393                                                   read_length); // TransferBufferLength
 394
 395                 if (status) {
 396                         dbg ("%s - ERROR %x", __FUNCTION__, status);
 397                         return status;
 398                 }
 399
 400                 if (read_length > 1) {
 401                         usb_serial_debug_data(debug, &dev->dev, __FUNCTION__,
 402                                               read_length, buffer);
 403                 }
 404
 405                 /* Update pointers/length */
 406                 start_address += read_length;
 407                 buffer += read_length;
 408                 length -= read_length;
 409         }
 410
 411         return status;
 412 }
 413
 414 static int TIReadRam (struct usb_device *dev, int start_address, int length, __u8 *buffer)
 415 {
 416         return TIReadDownloadMemory (dev,
 417                                      start_address,
 418                                      length,
 419                                      DTK_ADDR_SPACE_XDATA,
 420                                      buffer);
 421 }
 422
 423 /* Read edgeport memory to a given block */
 424 static int TIReadBootMemory (struct edgeport_serial *serial, int start_address, int length, __u8 * buffer)
 425 {
 426         int status = 0;
 427         int i;
 428
 429         for (i=0; i< length; i++) {
 430                 status = TIReadVendorRequestSync (serial->serial->dev,
 431                                         UMPC_MEMORY_READ,               // Request
 432                                         serial->TI_I2C_Type,            // wValue (Address type)
 433                                         (__u16)(start_address+i),       // wIndex
 434                                         &buffer[i],                     // TransferBuffer
 435                                         0x01);                          // TransferBufferLength
 436                 if (status) {
 437                         dbg ("%s - ERROR %x", __FUNCTION__, status);
 438                         return status;
 439                 }
 440         }
 441
 442         dbg ("%s - start_address = %x, length = %d", __FUNCTION__, start_address, length);
 443         usb_serial_debug_data(debug, &serial->serial->dev->dev, __FUNCTION__, length, buffer);
 444
 445         serial->TiReadI2C = 1;
 446
 447         return status;
 448 }
 449
 450 /* Write given block to TI EPROM memory */
 451 static int TIWriteBootMemory (struct edgeport_serial *serial, int start_address, int length, __u8 *buffer)
 452 {
 453         int status = 0;
 454         int i;
 455         __u8 temp;
 456
 457         /* Must do a read before write */
 458         if (!serial->TiReadI2C) {
 459                 status = TIReadBootMemory(serial, 0, 1, &temp);
 460                 if (status)
 461                         return status;
 462         }
 463
 464         for (i=0; i < length; ++i) {
 465                 status = TISendVendorRequestSync (serial->serial->dev,
 466                                                 UMPC_MEMORY_WRITE,              // Request
 467                                                 buffer[i],                      // wValue
 468                                                 (__u16)(i+start_address),       // wIndex
 469                                                 NULL,                           // TransferBuffer
 470                                                 0);                             // TransferBufferLength
 471                 if (status)
 472                         return status;
 473         }
 474
 475         dbg ("%s - start_sddr = %x, length = %d", __FUNCTION__, start_address, length);
 476         usb_serial_debug_data(debug, &serial->serial->dev->dev, __FUNCTION__, length, buffer);
 477
 478         return status;
 479 }
 480
 481
 482 /* Write edgeport I2C memory to TI chip */
 483 static int TIWriteDownloadI2C (struct edgeport_serial *serial, int start_address, int length, __u8 address_type, __u8 *buffer)
 484 {
 485         int status = 0;
 486         int write_length;
 487         __be16 be_start_address;
 488
 489         /* We can only send a maximum of 1 aligned byte page at a time */
 490
 491         /* calulate the number of bytes left in the first page */
 492         write_length = EPROM_PAGE_SIZE - (start_address & (EPROM_PAGE_SIZE - 1));
 493
 494         if (write_length > length)
 495                 write_length = length;
 496
 497         dbg ("%s - BytesInFirstPage Addr = %x, length = %d", __FUNCTION__, start_address, write_length);
 498         usb_serial_debug_data(debug, &serial->serial->dev->dev, __FUNCTION__, write_length, buffer);
 499
 500         /* Write first page */
 501         be_start_address = cpu_to_be16 (start_address);
 502         status = TISendVendorRequestSync (serial->serial->dev,
 503                                         UMPC_MEMORY_WRITE,      // Request
 504                                         (__u16)address_type,    // wValue
 505                                         (__force __u16)be_start_address,        // wIndex
 506                                         buffer,                 // TransferBuffer
 507                                         write_length);
 508         if (status) {
 509                 dbg ("%s - ERROR %d", __FUNCTION__, status);
 510                 return status;
 511         }
 512
 513         length          -= write_length;
 514         start_address   += write_length;
 515         buffer          += write_length;
 516
 517         /* We should be aligned now -- can write max page size bytes at a time */
 518         while (length) {
 519                 if (length > EPROM_PAGE_SIZE)
 520                         write_length = EPROM_PAGE_SIZE;
 521                 else
 522                         write_length = length;
 523
 524                 dbg ("%s - Page Write Addr = %x, length = %d", __FUNCTION__, start_address, write_length);
 525                 usb_serial_debug_data(debug, &serial->serial->dev->dev, __FUNCTION__, write_length, buffer);
 526
 527                 /* Write next page */
 528                 be_start_address = cpu_to_be16 (start_address);
 529                 status = TISendVendorRequestSync (serial->serial->dev,
 530                                                 UMPC_MEMORY_WRITE,      // Request
 531                                                 (__u16)address_type,    // wValue
 532                                                 (__force __u16)be_start_address,        // wIndex
 533                                                 buffer,                 // TransferBuffer
 534                                                 write_length);          // TransferBufferLength
 535                 if (status) {
 536                         dev_err (&serial->serial->dev->dev, "%s - ERROR %d\n", __FUNCTION__, status);
 537                         return status;
 538                 }
 539
 540                 length          -= write_length;
 541                 start_address   += write_length;
 542                 buffer          += write_length;
 543         }
 544         return status;
 545 }
 546
 547 /* Examine the UMP DMA registers and LSR
 548  *
 549  * Check the MSBit of the X and Y DMA byte count registers.
 550  * A zero in this bit indicates that the TX DMA buffers are empty
 551  * then check the TX Empty bit in the UART.
 552  */
 553 static int TIIsTxActive (struct edgeport_port *port)
 554 {
 555         int status;
 556         struct out_endpoint_desc_block *oedb;
 557         __u8 *lsr;
 558         int bytes_left = 0;
 559
 560         oedb = kmalloc (sizeof (* oedb), GFP_KERNEL);
 561         if (!oedb) {
 562                 dev_err (&port->port->dev, "%s - out of memory\n", __FUNCTION__);
 563                 return -ENOMEM;
 564         }
 565
 566         lsr = kmalloc (1, GFP_KERNEL);  /* Sigh, that's right, just one byte,
 567                                            as not all platforms can do DMA
 568                                            from stack */
 569         if (!lsr) {
 570                 kfree(oedb);
 571                 return -ENOMEM;
 572         }
 573         /* Read the DMA Count Registers */
 574         status = TIReadRam (port->port->serial->dev,
 575                             port->dma_address,
 576                             sizeof( *oedb),
 577                             (void *)oedb);
 578
 579         if (status)
 580                 goto exit_is_tx_active;
 581
 582         dbg ("%s - XByteCount    0x%X", __FUNCTION__, oedb->XByteCount);
 583
 584         /* and the LSR */
 585         status = TIReadRam (port->port->serial->dev,
 586                             port->uart_base + UMPMEM_OFFS_UART_LSR,
 587                             1,
 588                             lsr);
 589
 590         if (status)
 591                 goto exit_is_tx_active;
 592         dbg ("%s - LSR = 0x%X", __FUNCTION__, *lsr);
 593
 594         /* If either buffer has data or we are transmitting then return TRUE */
 595         if ((oedb->XByteCount & 0x80 ) != 0 )
 596                 bytes_left += 64;
 597
 598         if ((*lsr & UMP_UART_LSR_TX_MASK ) == 0 )
 599                 bytes_left += 1;
 600
 601         /* We return Not Active if we get any kind of error */
 602 exit_is_tx_active:
 603         dbg ("%s - return %d", __FUNCTION__, bytes_left );
 604
 605         kfree(lsr);
 606         kfree(oedb);
 607         return bytes_left;
 608 }
 609
 610 static void TIChasePort(struct edgeport_port *port, unsigned long timeout, int flush)
 611 {
 612         int baud_rate;
 613         struct tty_struct *tty = port->port->tty;
 614         wait_queue_t wait;
 615         unsigned long flags;
 616
 617         if (!timeout)
 618                 timeout = (HZ*EDGE_CLOSING_WAIT)/100;
 619
 620         /* wait for data to drain from the buffer */
 621         spin_lock_irqsave(&port->ep_lock, flags);
 622         init_waitqueue_entry(&wait, current);
 623         add_wait_queue(&tty->write_wait, &wait);
 624         for (;;) {
 625                 set_current_state(TASK_INTERRUPTIBLE);
 626                 if (edge_buf_data_avail(port->ep_out_buf) == 0
 627                 || timeout == 0 || signal_pending(current)
 628                 || !usb_get_intfdata(port->port->serial->interface))  /* disconnect */
 629                         break;
 630                 spin_unlock_irqrestore(&port->ep_lock, flags);
 631                 timeout = schedule_timeout(timeout);
 632                 spin_lock_irqsave(&port->ep_lock, flags);
 633         }
 634         set_current_state(TASK_RUNNING);
 635         remove_wait_queue(&tty->write_wait, &wait);
 636         if (flush)
 637                 edge_buf_clear(port->ep_out_buf);
 638         spin_unlock_irqrestore(&port->ep_lock, flags);
 639
 640         /* wait for data to drain from the device */
 641         timeout += jiffies;
 642         while ((long)(jiffies - timeout) < 0 && !signal_pending(current)
 643         && usb_get_intfdata(port->port->serial->interface)) {  /* not disconnected */
 644                 if (!TIIsTxActive(port))
 645                         break;
 646                 msleep(10);
 647         }
 648
 649         /* disconnected */
 650         if (!usb_get_intfdata(port->port->serial->interface))
 651                 return;
 652
 653         /* wait one more character time, based on baud rate */
 654         /* (TIIsTxActive doesn't seem to wait for the last byte) */
 655         if ((baud_rate=port->baud_rate) == 0)
 656                 baud_rate = 50;
 657         msleep(max(1,(10000+baud_rate-1)/baud_rate));
 658 }
 659
 660 static int TIChooseConfiguration (struct usb_device *dev)
 661 {
 662         // There may be multiple configurations on this device, in which case
 663         // we would need to read and parse all of them to find out which one
 664         // we want. However, we just support one config at this point,
 665         // configuration # 1, which is Config Descriptor 0.
 666
 667         dbg ("%s - Number of Interfaces = %d", __FUNCTION__, dev->config->desc.bNumInterfaces);
 668         dbg ("%s - MAX Power            = %d", __FUNCTION__, dev->config->desc.bMaxPower*2);
 669
 670         if (dev->config->desc.bNumInterfaces != 1) {
 671                 dev_err (&dev->dev, "%s - bNumInterfaces is not 1, ERROR!\n", __FUNCTION__);
 672                 return -ENODEV;
 673         }
 674
 675         return 0;
 676 }
 677
 678 static int TIReadRom (struct edgeport_serial *serial, int start_address, int length, __u8 *buffer)
 679 {
 680         int status;
 681
 682         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
 683                 status = TIReadDownloadMemory (serial->serial->dev,
 684                                                start_address,
 685                                                length,
 686                                                serial->TI_I2C_Type,
 687                                                buffer);
 688         } else {
 689                 status = TIReadBootMemory (serial,
 690                                            start_address,
 691                                            length,
 692                                            buffer);
 693         }
 694
 695         return status;
 696 }
 697
 698 static int TIWriteRom (struct edgeport_serial *serial, int start_address, int length, __u8 *buffer)
 699 {
 700         if (serial->product_info.TiMode == TI_MODE_BOOT)
 701                 return TIWriteBootMemory (serial,
 702                                           start_address,
 703                                           length,
 704                                           buffer);
 705
 706         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD)
 707                 return TIWriteDownloadI2C (serial,
 708                                            start_address,
 709                                            length,
 710                                            serial->TI_I2C_Type,
 711                                            buffer);
 712
 713         return -EINVAL;
 714 }
 715
 716
 717
 718 /* Read a descriptor header from I2C based on type */
 719 static int TIGetDescriptorAddress (struct edgeport_serial *serial, int desc_type, struct ti_i2c_desc *rom_desc)
 720 {
 721         int start_address;
 722         int status;
 723
 724         /* Search for requested descriptor in I2C */
 725         start_address = 2;
 726         do {
 727                 status = TIReadRom (serial,
 728                                    start_address,
 729                                    sizeof(struct ti_i2c_desc),
 730                                    (__u8 *)rom_desc );
 731                 if (status)
 732                         return 0;
 733
 734                 if (rom_desc->Type == desc_type)
 735                         return start_address;
 736
 737                 start_address = start_address + sizeof(struct ti_i2c_desc) +  rom_desc->Size;
 738
 739         } while ((start_address < TI_MAX_I2C_SIZE) && rom_desc->Type);
 740
 741         return 0;
 742 }
 743
 744 /* Validate descriptor checksum */
 745 static int ValidChecksum(struct ti_i2c_desc *rom_desc, __u8 *buffer)
 746 {
 747         __u16 i;
 748         __u8 cs = 0;
 749
 750         for (i=0; i < rom_desc->Size; i++) {
 751                 cs = (__u8)(cs + buffer[i]);
 752         }
 753         if (cs != rom_desc->CheckSum) {
 754                 dbg ("%s - Mismatch %x - %x", __FUNCTION__, rom_desc->CheckSum, cs);
 755                 return -EINVAL;
 756         }
 757         return 0;
 758 }
 759
 760 /* Make sure that the I2C image is good */
 761 static int TiValidateI2cImage (struct edgeport_serial *serial)
 762 {
 763         struct device *dev = &serial->serial->dev->dev;
 764         int status = 0;
 765         struct ti_i2c_desc *rom_desc;
 766         int start_address = 2;
 767         __u8 *buffer;
 768         __u16 ttype;
 769
 770         rom_desc = kmalloc (sizeof (*rom_desc), GFP_KERNEL);
 771         if (!rom_desc) {
 772                 dev_err (dev, "%s - out of memory\n", __FUNCTION__);
 773                 return -ENOMEM;
 774         }
 775         buffer = kmalloc (TI_MAX_I2C_SIZE, GFP_KERNEL);
 776         if (!buffer) {
 777                 dev_err (dev, "%s - out of memory when allocating buffer\n", __FUNCTION__);
 778                 kfree (rom_desc);
 779                 return -ENOMEM;
 780         }
 781
 782         // Read the first byte (Signature0) must be 0x52 or 0x10
 783         status = TIReadRom (serial, 0, 1, buffer);
 784         if (status)
 785                 goto ExitTiValidateI2cImage;
 786
 787         if (*buffer != UMP5152 && *buffer != UMP3410) {
 788                 dev_err (dev, "%s - invalid buffer signature\n", __FUNCTION__);
 789                 status = -ENODEV;
 790                 goto ExitTiValidateI2cImage;
 791         }
 792
 793         do {
 794                 // Validate the I2C
 795                 status = TIReadRom (serial,
 796                                 start_address,
 797                                 sizeof(struct ti_i2c_desc),
 798                                 (__u8 *)rom_desc);
 799                 if (status)
 800                         break;
 801
 802                 if ((start_address + sizeof(struct ti_i2c_desc) + rom_desc->Size) > TI_MAX_I2C_SIZE) {
 803                         status = -ENODEV;
 804                         dbg ("%s - structure too big, erroring out.", __FUNCTION__);
 805                         break;
 806                 }
 807
 808                 dbg ("%s Type = 0x%x", __FUNCTION__, rom_desc->Type);
 809
 810                 // Skip type 2 record
 811                 ttype = rom_desc->Type & 0x0f;
 812                 if ( ttype != I2C_DESC_TYPE_FIRMWARE_BASIC
 813                         && ttype != I2C_DESC_TYPE_FIRMWARE_AUTO ) {
 814                         // Read the descriptor data
 815                         status = TIReadRom(serial,
 816                                                 start_address+sizeof(struct ti_i2c_desc),
 817                                                 rom_desc->Size,
 818                                                 buffer);
 819                         if (status)
 820                                 break;
 821
 822                         status = ValidChecksum(rom_desc, buffer);
 823                         if (status)
 824                                 break;
 825                 }
 826                 start_address = start_address + sizeof(struct ti_i2c_desc) + rom_desc->Size;
 827
 828         } while ((rom_desc->Type != I2C_DESC_TYPE_ION) && (start_address < TI_MAX_I2C_SIZE));
 829
 830         if ((rom_desc->Type != I2C_DESC_TYPE_ION) || (start_address > TI_MAX_I2C_SIZE))
 831                 status = -ENODEV;
 832
 833 ExitTiValidateI2cImage:
 834         kfree (buffer);
 835         kfree (rom_desc);
 836         return status;
 837 }
 838
 839 static int TIReadManufDescriptor (struct edgeport_serial *serial, __u8 *buffer)
 840 {
 841         int status;
 842         int start_address;
 843         struct ti_i2c_desc *rom_desc;
 844         struct edge_ti_manuf_descriptor *desc;
 845
 846         rom_desc = kmalloc (sizeof (*rom_desc), GFP_KERNEL);
 847         if (!rom_desc) {
 848                 dev_err (&serial->serial->dev->dev, "%s - out of memory\n", __FUNCTION__);
 849                 return -ENOMEM;
 850         }
 851         start_address = TIGetDescriptorAddress (serial, I2C_DESC_TYPE_ION, rom_desc);
 852
 853         if (!start_address) {
 854                 dbg ("%s - Edge Descriptor not found in I2C", __FUNCTION__);
 855                 status = -ENODEV;
 856                 goto exit;
 857         }
 858
 859         // Read the descriptor data
 860         status = TIReadRom (serial,
 861                                 start_address+sizeof(struct ti_i2c_desc),
 862                                 rom_desc->Size,
 863                                 buffer);
 864         if (status)
 865                 goto exit;
 866
 867         status = ValidChecksum(rom_desc, buffer);
 868
 869         desc = (struct edge_ti_manuf_descriptor *)buffer;
 870         dbg ( "%s - IonConfig      0x%x", __FUNCTION__, desc->IonConfig         );
 871         dbg ( "%s - Version          %d", __FUNCTION__, desc->Version           );
 872         dbg ( "%s - Cpu/Board      0x%x", __FUNCTION__, desc->CpuRev_BoardRev   );
 873         dbg ( "%s - NumPorts         %d", __FUNCTION__, desc->NumPorts          );
 874         dbg ( "%s - NumVirtualPorts  %d", __FUNCTION__, desc->NumVirtualPorts   );
 875         dbg ( "%s - TotalPorts       %d", __FUNCTION__, desc->TotalPorts        );
 876
 877 exit:
 878         kfree (rom_desc);
 879         return status;
 880 }
 881
 882 /* Build firmware header used for firmware update */
 883 static int BuildI2CFirmwareHeader (__u8 *header, struct device *dev)
 884 {
 885         __u8 *buffer;
 886         int buffer_size;
 887         int i;
 888         __u8 cs = 0;
 889         struct ti_i2c_desc *i2c_header;
 890         struct ti_i2c_image_header *img_header;
 891         struct ti_i2c_firmware_rec *firmware_rec;
 892
 893         // In order to update the I2C firmware we must change the type 2 record to type 0xF2.
 894         // This will force the UMP to come up in Boot Mode.  Then while in boot mode, the driver
 895         // will download the latest firmware (padded to 15.5k) into the UMP ram.
 896         // And finally when the device comes back up in download mode the driver will cause
 897         // the new firmware to be copied from the UMP Ram to I2C and the firmware will update
 898         // the record type from 0xf2 to 0x02.
 899
 900         // Allocate a 15.5k buffer + 2 bytes for version number (Firmware Record)
 901         buffer_size = (((1024 * 16) - 512 )+ sizeof(struct ti_i2c_firmware_rec));
 902
 903         buffer = kmalloc (buffer_size, GFP_KERNEL);
 904         if (!buffer) {
 905                 dev_err (dev, "%s - out of memory\n", __FUNCTION__);
 906                 return -ENOMEM;
 907         }
 908
 909         // Set entire image of 0xffs
 910         memset (buffer, 0xff, buffer_size);
 911
 912         // Copy version number into firmware record
 913         firmware_rec = (struct ti_i2c_firmware_rec *)buffer;
 914
 915         firmware_rec->Ver_Major = OperationalCodeImageVersion.MajorVersion;
 916         firmware_rec->Ver_Minor = OperationalCodeImageVersion.MinorVersion;
 917
 918         // Pointer to fw_down memory image
 919         img_header = (struct ti_i2c_image_header *)&PagableOperationalCodeImage[0];
 920
 921         memcpy (buffer + sizeof(struct ti_i2c_firmware_rec),
 922                 &PagableOperationalCodeImage[sizeof(struct ti_i2c_image_header)],
 923                 le16_to_cpu(img_header->Length));
 924
 925         for (i=0; i < buffer_size; i++) {
 926                 cs = (__u8)(cs + buffer[i]);
 927         }
 928
 929         kfree (buffer);
 930
 931         // Build new header
 932         i2c_header =  (struct ti_i2c_desc *)header;
 933         firmware_rec =  (struct ti_i2c_firmware_rec*)i2c_header->Data;
 934
 935         i2c_header->Type        = I2C_DESC_TYPE_FIRMWARE_BLANK;
 936         i2c_header->Size        = (__u16)buffer_size;
 937         i2c_header->CheckSum    = cs;
 938         firmware_rec->Ver_Major = OperationalCodeImageVersion.MajorVersion;
 939         firmware_rec->Ver_Minor = OperationalCodeImageVersion.MinorVersion;
 940
 941         return 0;
 942 }
 943
 944 /* Try to figure out what type of I2c we have */
 945 static int TIGetI2cTypeInBootMode (struct edgeport_serial *serial)
 946 {
 947         int status;
 948         __u8 data;
 949
 950         // Try to read type 2
 951         status = TIReadVendorRequestSync (serial->serial->dev,
 952                                         UMPC_MEMORY_READ,               // Request
 953                                         DTK_ADDR_SPACE_I2C_TYPE_II,     // wValue (Address type)
 954                                         0,                              // wIndex
 955                                         &data,                          // TransferBuffer
 956                                         0x01);                          // TransferBufferLength
 957         if (status)
 958                 dbg ("%s - read 2 status error = %d", __FUNCTION__, status);
 959         else
 960                 dbg ("%s - read 2 data = 0x%x", __FUNCTION__, data);
 961         if ((!status) && (data == UMP5152 || data == UMP3410)) {
 962                 dbg ("%s - ROM_TYPE_II", __FUNCTION__);
 963                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
 964                 return 0;
 965         }
 966
 967         // Try to read type 3
 968         status = TIReadVendorRequestSync (serial->serial->dev,
 969                                         UMPC_MEMORY_READ,               // Request
 970                                         DTK_ADDR_SPACE_I2C_TYPE_III,    // wValue (Address type)
 971                                         0,                              // wIndex
 972                                         &data,                          // TransferBuffer
 973                                         0x01);                          // TransferBufferLength
 974         if (status)
 975                 dbg ("%s - read 3 status error = %d", __FUNCTION__, status);
 976         else
 977                 dbg ("%s - read 2 data = 0x%x", __FUNCTION__, data);
 978         if ((!status) && (data == UMP5152 || data == UMP3410)) {
 979                 dbg ("%s - ROM_TYPE_III", __FUNCTION__);
 980                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_III;
 981                 return 0;
 982         }
 983
 984         dbg ("%s - Unknown", __FUNCTION__);
 985         serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
 986         return -ENODEV;
 987 }
 988
 989 static int TISendBulkTransferSync (struct usb_serial *serial, void *buffer, int length, int *num_sent)
 990 {
 991         int status;
 992
 993         status = usb_bulk_msg (serial->dev,
 994                                 usb_sndbulkpipe(serial->dev,
 995                                                 serial->port[0]->bulk_out_endpointAddress),
 996                                 buffer,
 997                                 length,
 998                                 num_sent,
 999                                 1000);
1000         return status;
1001 }
1002
1003 /* Download given firmware image to the device (IN BOOT MODE) */
1004 static int TIDownloadCodeImage (struct edgeport_serial *serial, __u8 *image, int image_length)
1005 {
1006         int status = 0;
1007         int pos;
1008         int transfer;
1009         int done;
1010
1011         // Transfer firmware image
1012         for (pos = 0; pos < image_length; ) {
1013                 // Read the next buffer from file
1014                 transfer = image_length - pos;
1015                 if (transfer > EDGE_FW_BULK_MAX_PACKET_SIZE)
1016                         transfer = EDGE_FW_BULK_MAX_PACKET_SIZE;
1017
1018                 // Transfer data
1019                 status = TISendBulkTransferSync (serial->serial, &image[pos], transfer, &done);
1020                 if (status)
1021                         break;
1022                 // Advance buffer pointer
1023                 pos += done;
1024         }
1025
1026         return status;
1027 }
1028
1029 // FIXME!!!
1030 static int TIConfigureBootDevice (struct usb_device *dev)
1031 {
1032         return 0;
1033 }
1034
1035 /**
1036  * DownloadTIFirmware - Download run-time operating firmware to the TI5052
1037  *
1038  * This routine downloads the main operating code into the TI5052, using the
1039  * boot code already burned into E2PROM or ROM.
1040  */
1041 static int TIDownloadFirmware (struct edgeport_serial *serial)
1042 {
1043         struct device *dev = &serial->serial->dev->dev;
1044         int status = 0;
1045         int start_address;
1046         struct edge_ti_manuf_descriptor *ti_manuf_desc;
1047         struct usb_interface_descriptor *interface;
1048         int download_cur_ver;
1049         int download_new_ver;
1050
1051         /* This routine is entered by both the BOOT mode and the Download mode
1052          * We can determine which code is running by the reading the config
1053          * descriptor and if we have only one bulk pipe it is in boot mode
1054          */
1055         serial->product_info.hardware_type = HARDWARE_TYPE_TIUMP;
1056
1057         /* Default to type 2 i2c */
1058         serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1059
1060         status = TIChooseConfiguration (serial->serial->dev);
1061         if (status)
1062                 return status;
1063
1064         interface = &serial->serial->interface->cur_altsetting->desc;
1065         if (!interface) {
1066                 dev_err (dev, "%s - no interface set, error!\n", __FUNCTION__);
1067                 return -ENODEV;
1068         }
1069
1070         // Setup initial mode -- the default mode 0 is TI_MODE_CONFIGURING
1071         // if we have more than one endpoint we are definitely in download mode
1072         if (interface->bNumEndpoints > 1)
1073                 serial->product_info.TiMode = TI_MODE_DOWNLOAD;
1074         else
1075                 // Otherwise we will remain in configuring mode
1076                 serial->product_info.TiMode = TI_MODE_CONFIGURING;
1077
1078         // Save Download Version Number
1079         OperationalCodeImageVersion.MajorVersion = PagableOperationalCodeImageVersion.MajorVersion;
1080         OperationalCodeImageVersion.MinorVersion = PagableOperationalCodeImageVersion.MinorVersion;
1081         OperationalCodeImageVersion.BuildNumber  = PagableOperationalCodeImageVersion.BuildNumber;
1082
1083         /********************************************************************/
1084         /* Download Mode */
1085         /********************************************************************/
1086         if (serial->product_info.TiMode == TI_MODE_DOWNLOAD) {
1087                 struct ti_i2c_desc *rom_desc;
1088
1089                 dbg ("%s - <<<<<<<<<<<<<<<RUNNING IN DOWNLOAD MODE>>>>>>>>>>", __FUNCTION__);
1090
1091                 status = TiValidateI2cImage (serial);
1092                 if (status) {
1093                         dbg ("%s - <<<<<<<<<<<<<<<DOWNLOAD MODE -- BAD I2C >>>>>>>>>>",
1094                              __FUNCTION__);
1095                         return status;
1096                 }
1097
1098                 /* Validate Hardware version number
1099                  * Read Manufacturing Descriptor from TI Based Edgeport
1100                  */
1101                 ti_manuf_desc = kmalloc (sizeof (*ti_manuf_desc), GFP_KERNEL);
1102                 if (!ti_manuf_desc) {
1103                         dev_err (dev, "%s - out of memory.\n", __FUNCTION__);
1104                         return -ENOMEM;
1105                 }
1106                 status = TIReadManufDescriptor (serial, (__u8 *)ti_manuf_desc);
1107                 if (status) {
1108                         kfree (ti_manuf_desc);
1109                         return status;
1110                 }
1111
1112                 // Check version number of ION descriptor
1113                 if (!ignore_cpu_rev && TI_GET_CPU_REVISION(ti_manuf_desc->CpuRev_BoardRev) < 2) {
1114                         dbg ( "%s - Wrong CPU Rev %d (Must be 2)", __FUNCTION__,
1115                              TI_GET_CPU_REVISION(ti_manuf_desc->CpuRev_BoardRev));
1116                         kfree (ti_manuf_desc);
1117                         return -EINVAL;
1118                 }
1119
1120                 rom_desc = kmalloc (sizeof (*rom_desc), GFP_KERNEL);
1121                 if (!rom_desc) {
1122                         dev_err (dev, "%s - out of memory.\n", __FUNCTION__);
1123                         kfree (ti_manuf_desc);
1124                         return -ENOMEM;
1125                 }
1126
1127                 // Search for type 2 record (firmware record)
1128                 if ((start_address = TIGetDescriptorAddress (serial, I2C_DESC_TYPE_FIRMWARE_BASIC, rom_desc)) != 0) {
1129                         struct ti_i2c_firmware_rec *firmware_version;
1130                         __u8 record;
1131
1132                         dbg ("%s - Found Type FIRMWARE (Type 2) record", __FUNCTION__);
1133
1134                         firmware_version = kmalloc (sizeof (*firmware_version), GFP_KERNEL);
1135                         if (!firmware_version) {
1136                                 dev_err (dev, "%s - out of memory.\n", __FUNCTION__);
1137                                 kfree (rom_desc);
1138                                 kfree (ti_manuf_desc);
1139                                 return -ENOMEM;
1140                         }
1141
1142                         // Validate version number
1143                         // Read the descriptor data
1144                         status = TIReadRom (serial,
1145                                         start_address+sizeof(struct ti_i2c_desc),
1146                                         sizeof(struct ti_i2c_firmware_rec),
1147                                         (__u8 *)firmware_version);
1148                         if (status) {
1149                                 kfree (firmware_version);
1150                                 kfree (rom_desc);
1151                                 kfree (ti_manuf_desc);
1152                                 return status;
1153                         }
1154
1155                         // Check version number of download with current version in I2c
1156                         download_cur_ver = (firmware_version->Ver_Major << 8) +
1157                                            (firmware_version->Ver_Minor);
1158                         download_new_ver = (OperationalCodeImageVersion.MajorVersion << 8) +
1159                                            (OperationalCodeImageVersion.MinorVersion);
1160
1161                         dbg ("%s - >>>Firmware Versions Device %d.%d  Driver %d.%d",
1162                              __FUNCTION__,
1163                              firmware_version->Ver_Major,
1164                              firmware_version->Ver_Minor,
1165                              OperationalCodeImageVersion.MajorVersion,
1166                              OperationalCodeImageVersion.MinorVersion);
1167
1168                         // Check if we have an old version in the I2C and update if necessary
1169                         if (download_cur_ver != download_new_ver) {
1170                                 dbg ("%s - Update I2C Download from %d.%d to %d.%d",
1171                                      __FUNCTION__,
1172                                      firmware_version->Ver_Major,
1173                                      firmware_version->Ver_Minor,
1174                                      OperationalCodeImageVersion.MajorVersion,
1175                                      OperationalCodeImageVersion.MinorVersion);
1176
1177                                 // In order to update the I2C firmware we must change the type 2 record to type 0xF2.
1178                                 // This will force the UMP to come up in Boot Mode.  Then while in boot mode, the driver
1179                                 // will download the latest firmware (padded to 15.5k) into the UMP ram.
1180                                 // And finally when the device comes back up in download mode the driver will cause
1181                                 // the new firmware to be copied from the UMP Ram to I2C and the firmware will update
1182                                 // the record type from 0xf2 to 0x02.
1183
1184                                 record = I2C_DESC_TYPE_FIRMWARE_BLANK;
1185
1186                                 // Change the I2C Firmware record type to 0xf2 to trigger an update
1187                                 status = TIWriteRom (serial,
1188                                                         start_address,
1189                                                         sizeof(record),
1190                                                         &record);
1191                                 if (status) {
1192                                         kfree (firmware_version);
1193                                         kfree (rom_desc);
1194                                         kfree (ti_manuf_desc);
1195                                         return status;
1196                                 }
1197
1198                                 // verify the write -- must do this in order for write to
1199                                 // complete before we do the hardware reset
1200                                 status = TIReadRom (serial,
1201                                                         start_address,
1202                                                         sizeof(record),
1203                                                         &record);
1204
1205                                 if (status) {
1206                                         kfree (firmware_version);
1207                                         kfree (rom_desc);
1208                                         kfree (ti_manuf_desc);
1209                                         return status;
1210                                 }
1211
1212                                 if (record != I2C_DESC_TYPE_FIRMWARE_BLANK) {
1213                                         dev_err (dev, "%s - error resetting device\n", __FUNCTION__);
1214                                         kfree (firmware_version);
1215                                         kfree (rom_desc);
1216                                         kfree (ti_manuf_desc);
1217                                         return -ENODEV;
1218                                 }
1219
1220                                 dbg ("%s - HARDWARE RESET", __FUNCTION__);
1221
1222                                 // Reset UMP -- Back to BOOT MODE
1223                                 status = TISendVendorRequestSync (serial->serial->dev,
1224                                                                 UMPC_HARDWARE_RESET,    // Request
1225                                                                 0,                      // wValue
1226                                                                 0,                      // wIndex
1227                                                                 NULL,                   // TransferBuffer
1228                                                                 0);                     // TransferBufferLength
1229
1230                                 dbg ( "%s - HARDWARE RESET return %d", __FUNCTION__, status);
1231
1232                                 /* return an error on purpose. */
1233                                 kfree (firmware_version);
1234                                 kfree (rom_desc);
1235                                 kfree (ti_manuf_desc);
1236                                 return -ENODEV;
1237                         }
1238                         kfree (firmware_version);
1239                 }
1240                 // Search for type 0xF2 record (firmware blank record)
1241                 else if ((start_address = TIGetDescriptorAddress (serial, I2C_DESC_TYPE_FIRMWARE_BLANK, rom_desc)) != 0) {
1242                         #define HEADER_SIZE     (sizeof(struct ti_i2c_desc) + sizeof(struct ti_i2c_firmware_rec))
1243                         __u8 *header;
1244                         __u8 *vheader;
1245
1246                         header  = kmalloc (HEADER_SIZE, GFP_KERNEL);
1247                         if (!header) {
1248                                 dev_err (dev, "%s - out of memory.\n", __FUNCTION__);
1249                                 kfree (rom_desc);
1250                                 kfree (ti_manuf_desc);
1251                                 return -ENOMEM;
1252                         }
1253
1254                         vheader = kmalloc (HEADER_SIZE, GFP_KERNEL);
1255                         if (!vheader) {
1256                                 dev_err (dev, "%s - out of memory.\n", __FUNCTION__);
1257                                 kfree (header);
1258                                 kfree (rom_desc);
1259                                 kfree (ti_manuf_desc);
1260                                 return -ENOMEM;
1261                         }
1262
1263                         dbg ("%s - Found Type BLANK FIRMWARE (Type F2) record", __FUNCTION__);
1264
1265                         // In order to update the I2C firmware we must change the type 2 record to type 0xF2.
1266                         // This will force the UMP to come up in Boot Mode.  Then while in boot mode, the driver
1267                         // will download the latest firmware (padded to 15.5k) into the UMP ram.
1268                         // And finally when the device comes back up in download mode the driver will cause
1269                         // the new firmware to be copied from the UMP Ram to I2C and the firmware will update
1270                         // the record type from 0xf2 to 0x02.
1271                         status = BuildI2CFirmwareHeader(header, dev);
1272                         if (status) {
1273                                 kfree (vheader);
1274                                 kfree (header);
1275                                 kfree (rom_desc);
1276                                 kfree (ti_manuf_desc);
1277                                 return status;
1278                         }
1279
1280                         // Update I2C with type 0xf2 record with correct size and checksum
1281                         status = TIWriteRom (serial,
1282                                                 start_address,
1283                                                 HEADER_SIZE,
1284                                                 header);
1285                         if (status) {
1286                                 kfree (vheader);
1287                                 kfree (header);
1288                                 kfree (rom_desc);
1289                                 kfree (ti_manuf_desc);
1290                                 return status;
1291                         }
1292
1293                         // verify the write -- must do this in order for write to
1294                         // complete before we do the hardware reset
1295                         status = TIReadRom (serial,
1296                                                 start_address,
1297                                                 HEADER_SIZE,
1298                                                 vheader);
1299
1300                         if (status) {
1301                                 dbg ("%s - can't read header back", __FUNCTION__);
1302                                 kfree (vheader);
1303                                 kfree (header);
1304                                 kfree (rom_desc);
1305                                 kfree (ti_manuf_desc);
1306                                 return status;
1307                         }
1308                         if (memcmp(vheader, header, HEADER_SIZE)) {
1309                                 dbg ("%s - write download record failed", __FUNCTION__);
1310                                 kfree (vheader);
1311                                 kfree (header);
1312                                 kfree (rom_desc);
1313                                 kfree (ti_manuf_desc);
1314                                 return status;
1315                         }
1316
1317                         kfree (vheader);
1318                         kfree (header);
1319
1320                         dbg ("%s - Start firmware update", __FUNCTION__);
1321
1322                         // Tell firmware to copy download image into I2C
1323                         status = TISendVendorRequestSync (serial->serial->dev,
1324                                                 UMPC_COPY_DNLD_TO_I2C,  // Request
1325                                                 0,                      // wValue
1326                                                 0,                      // wIndex
1327                                                 NULL,                   // TransferBuffer
1328                                                 0);                     // TransferBufferLength
1329
1330                         dbg ("%s - Update complete 0x%x", __FUNCTION__, status);
1331                         if (status) {
1332                                 dev_err (dev, "%s - UMPC_COPY_DNLD_TO_I2C failed\n", __FUNCTION__);
1333                                 kfree (rom_desc);
1334                                 kfree (ti_manuf_desc);
1335                                 return status;
1336                         }
1337                 }
1338
1339                 // The device is running the download code
1340                 kfree (rom_desc);
1341                 kfree (ti_manuf_desc);
1342                 return 0;
1343         }
1344
1345         /********************************************************************/
1346         /* Boot Mode */
1347         /********************************************************************/
1348         dbg ("%s - <<<<<<<<<<<<<<<RUNNING IN BOOT MODE>>>>>>>>>>>>>>>",
1349              __FUNCTION__);
1350
1351         // Configure the TI device so we can use the BULK pipes for download
1352         status = TIConfigureBootDevice (serial->serial->dev);
1353         if (status)
1354                 return status;
1355
1356         if (le16_to_cpu(serial->serial->dev->descriptor.idVendor) != USB_VENDOR_ID_ION) {
1357                 dbg ("%s - VID = 0x%x", __FUNCTION__,
1358                      le16_to_cpu(serial->serial->dev->descriptor.idVendor));
1359                 serial->TI_I2C_Type = DTK_ADDR_SPACE_I2C_TYPE_II;
1360                 goto StayInBootMode;
1361         }
1362
1363         // We have an ION device (I2c Must be programmed)
1364         // Determine I2C image type
1365         if (TIGetI2cTypeInBootMode(serial)) {
1366                 goto StayInBootMode;
1367         }
1368
1369         // Registry variable set?
1370         if (TIStayInBootMode) {
1371                 dbg ("%s - TIStayInBootMode", __FUNCTION__);
1372                 goto StayInBootMode;
1373         }
1374
1375         // Check for ION Vendor ID and that the I2C is valid
1376         if (!TiValidateI2cImage(serial)) {
1377                 struct ti_i2c_image_header *header;
1378                 int i;
1379                 __u8 cs = 0;
1380                 __u8 *buffer;
1381                 int buffer_size;
1382
1383                 /* Validate Hardware version number
1384                  * Read Manufacturing Descriptor from TI Based Edgeport
1385                  */
1386                 ti_manuf_desc = kmalloc (sizeof (*ti_manuf_desc), GFP_KERNEL);
1387                 if (!ti_manuf_desc) {
1388                         dev_err (dev, "%s - out of memory.\n", __FUNCTION__);
1389                         return -ENOMEM;
1390                 }
1391                 status = TIReadManufDescriptor (serial, (__u8 *)ti_manuf_desc);
1392                 if (status) {
1393                         kfree (ti_manuf_desc);
1394                         goto StayInBootMode;
1395                 }
1396
1397                 // Check for version 2
1398                 if (!ignore_cpu_rev && TI_GET_CPU_REVISION(ti_manuf_desc->CpuRev_BoardRev) < 2) {
1399                         dbg ("%s - Wrong CPU Rev %d (Must be 2)", __FUNCTION__,
1400                              TI_GET_CPU_REVISION(ti_manuf_desc->CpuRev_BoardRev));
1401                         kfree (ti_manuf_desc);
1402                         goto StayInBootMode;
1403                 }
1404
1405                 kfree (ti_manuf_desc);
1406
1407                 // In order to update the I2C firmware we must change the type 2 record to type 0xF2.
1408                 // This will force the UMP to come up in Boot Mode.  Then while in boot mode, the driver
1409                 // will download the latest firmware (padded to 15.5k) into the UMP ram.
1410                 // And finally when the device comes back up in download mode the driver will cause
1411                 // the new firmware to be copied from the UMP Ram to I2C and the firmware will update
1412                 // the record type from 0xf2 to 0x02.
1413
1414                 /*
1415                  * Do we really have to copy the whole firmware image,
1416                  * or could we do this in place!
1417                  */
1418
1419                 // Allocate a 15.5k buffer + 3 byte header
1420                 buffer_size = (((1024 * 16) - 512) + sizeof(struct ti_i2c_image_header));
1421                 buffer = kmalloc (buffer_size, GFP_KERNEL);
1422                 if (!buffer) {
1423                         dev_err (dev, "%s - out of memory\n", __FUNCTION__);
1424                         return -ENOMEM;
1425                 }
1426
1427                 // Initialize the buffer to 0xff (pad the buffer)
1428                 memset (buffer, 0xff, buffer_size);
1429
1430                 memcpy (buffer, &PagableOperationalCodeImage[0], PagableOperationalCodeSize);
1431
1432                 for(i = sizeof(struct ti_i2c_image_header); i < buffer_size; i++) {
1433                         cs = (__u8)(cs + buffer[i]);
1434                 }
1435
1436                 header = (struct ti_i2c_image_header *)buffer;
1437
1438                 // update length and checksum after padding
1439                 header->Length   = cpu_to_le16((__u16)(buffer_size - sizeof(struct ti_i2c_image_header)));
1440                 header->CheckSum = cs;
1441
1442                 // Download the operational code
1443                 dbg ("%s - Downloading operational code image (TI UMP)", __FUNCTION__);
1444                 status = TIDownloadCodeImage (serial, buffer, buffer_size);
1445
1446                 kfree (buffer);
1447
1448                 if (status) {
1449                         dbg ("%s - Error downloading operational code image", __FUNCTION__);
1450                         return status;
1451                 }
1452
1453                 // Device will reboot
1454                 serial->product_info.TiMode = TI_MODE_TRANSITIONING;
1455
1456                 dbg ("%s - Download successful -- Device rebooting...", __FUNCTION__);
1457
1458                 /* return an error on purpose */
1459                 return -ENODEV;
1460         }
1461
1462 StayInBootMode:
1463         // Eprom is invalid or blank stay in boot mode
1464         dbg ("%s - <<<<<<<<<<<<<<<STAYING IN BOOT MODE>>>>>>>>>>>>", __FUNCTION__);
1465         serial->product_info.TiMode = TI_MODE_BOOT;
1466
1467         return 0;
1468 }
1469
1470
1471 static int TISetDtr (struct edgeport_port *port)
1472 {
1473         int port_number = port->port->number - port->port->serial->minor;
1474
1475         dbg ("%s", __FUNCTION__);
1476         port->shadow_mcr |= MCR_DTR;
1477
1478         return TIWriteCommandSync (port->port->serial->dev,
1479                                 UMPC_SET_CLR_DTR,
1480                                 (__u8)(UMPM_UART1_PORT + port_number),
1481                                 1,      /* set */
1482                                 NULL,
1483                                 0);
1484 }
1485
1486 static int TIClearDtr (struct edgeport_port *port)
1487 {
1488         int port_number = port->port->number - port->port->serial->minor;
1489
1490         dbg ("%s", __FUNCTION__);
1491         port->shadow_mcr &= ~MCR_DTR;
1492
1493         return TIWriteCommandSync (port->port->serial->dev,
1494                                 UMPC_SET_CLR_DTR,
1495                                 (__u8)(UMPM_UART1_PORT + port_number),
1496                                 0,      /* clear */
1497                                 NULL,
1498                                 0);
1499 }
1500
1501 static int TISetRts (struct edgeport_port *port)
1502 {
1503         int port_number = port->port->number - port->port->serial->minor;
1504
1505         dbg ("%s", __FUNCTION__);
1506         port->shadow_mcr |= MCR_RTS;
1507
1508         return TIWriteCommandSync (port->port->serial->dev,
1509                                 UMPC_SET_CLR_RTS,
1510                                 (__u8)(UMPM_UART1_PORT + port_number),
1511                                 1,      /* set */
1512                                 NULL,
1513                                 0);
1514 }
1515
1516 static int TIClearRts (struct edgeport_port *port)
1517 {
1518         int port_number = port->port->number - port->port->serial->minor;
1519
1520         dbg ("%s", __FUNCTION__);
1521         port->shadow_mcr &= ~MCR_RTS;
1522
1523         return TIWriteCommandSync (port->port->serial->dev,
1524                                 UMPC_SET_CLR_RTS,
1525                                 (__u8)(UMPM_UART1_PORT + port_number),
1526                                 0,      /* clear */
1527                                 NULL,
1528                                 0);
1529 }
1530
1531 static int TISetLoopBack (struct edgeport_port *port)
1532 {
1533         int port_number = port->port->number - port->port->serial->minor;
1534
1535         dbg ("%s", __FUNCTION__);
1536
1537         return TIWriteCommandSync (port->port->serial->dev,
1538                                 UMPC_SET_CLR_LOOPBACK,
1539                                 (__u8)(UMPM_UART1_PORT + port_number),
1540                                 1,      /* set */
1541                                 NULL,
1542                                 0);
1543 }
1544
1545 static int TIClearLoopBack (struct edgeport_port *port)
1546 {
1547         int port_number = port->port->number - port->port->serial->minor;
1548
1549         dbg ("%s", __FUNCTION__);
1550
1551         return TIWriteCommandSync (port->port->serial->dev,
1552                                 UMPC_SET_CLR_LOOPBACK,
1553                                 (__u8)(UMPM_UART1_PORT + port_number),
1554                                 0,      /* clear */
1555                                 NULL,
1556                                 0);
1557 }
1558
1559 static int TISetBreak (struct edgeport_port *port)
1560 {
1561         int port_number = port->port->number - port->port->serial->minor;
1562
1563         dbg ("%s", __FUNCTION__);
1564
1565         return TIWriteCommandSync (port->port->serial->dev,
1566                                 UMPC_SET_CLR_BREAK,
1567                                 (__u8)(UMPM_UART1_PORT + port_number),
1568                                 1,      /* set */
1569                                 NULL,
1570                                 0);
1571 }
1572
1573 static int TIClearBreak (struct edgeport_port *port)
1574 {
1575         int port_number = port->port->number - port->port->serial->minor;
1576
1577         dbg ("%s", __FUNCTION__);
1578
1579         return TIWriteCommandSync (port->port->serial->dev,
1580                                 UMPC_SET_CLR_BREAK,
1581                                 (__u8)(UMPM_UART1_PORT + port_number),
1582                                 0,      /* clear */
1583                                 NULL,
1584                                 0);
1585 }
1586
1587 static int TIRestoreMCR (struct edgeport_port *port, __u8 mcr)
1588 {
1589         int status = 0;
1590
1591         dbg ("%s - %x", __FUNCTION__, mcr);
1592
1593         if (mcr & MCR_DTR)
1594                 status = TISetDtr (port);
1595         else
1596                 status = TIClearDtr (port);
1597
1598         if (status)
1599                 return status;
1600
1601         if (mcr & MCR_RTS)
1602                 status = TISetRts (port);
1603         else
1604                 status = TIClearRts (port);
1605
1606         if (status)
1607                 return status;
1608
1609         if (mcr & MCR_LOOPBACK)
1610                 status = TISetLoopBack (port);
1611         else
1612                 status = TIClearLoopBack (port);
1613
1614         return status;
1615 }
1616
1617
1618
1619 /* Convert TI LSR to standard UART flags */
1620 static __u8 MapLineStatus (__u8 ti_lsr)
1621 {
1622         __u8 lsr = 0;
1623
1624 #define MAP_FLAG(flagUmp, flagUart)    \
1625         if (ti_lsr & flagUmp) \
1626                 lsr |= flagUart;
1627
1628         MAP_FLAG(UMP_UART_LSR_OV_MASK, LSR_OVER_ERR)    /* overrun */
1629         MAP_FLAG(UMP_UART_LSR_PE_MASK, LSR_PAR_ERR)     /* parity error */
1630         MAP_FLAG(UMP_UART_LSR_FE_MASK, LSR_FRM_ERR)     /* framing error */
1631         MAP_FLAG(UMP_UART_LSR_BR_MASK, LSR_BREAK)       /* break detected */
1632         MAP_FLAG(UMP_UART_LSR_RX_MASK, LSR_RX_AVAIL)    /* receive data available */
1633         MAP_FLAG(UMP_UART_LSR_TX_MASK, LSR_TX_EMPTY)    /* transmit holding register empty */
1634
1635 #undef MAP_FLAG
1636
1637         return lsr;
1638 }
1639
1640 static void handle_new_msr (struct edgeport_port *edge_port, __u8 msr)
1641 {
1642         struct async_icount *icount;
1643         struct tty_struct *tty;
1644
1645         dbg ("%s - %02x", __FUNCTION__, msr);
1646
1647         if (msr & (EDGEPORT_MSR_DELTA_CTS | EDGEPORT_MSR_DELTA_DSR | EDGEPORT_MSR_DELTA_RI | EDGEPORT_MSR_DELTA_CD)) {
1648                 icount = &edge_port->icount;
1649
1650                 /* update input line counters */
1651                 if (msr & EDGEPORT_MSR_DELTA_CTS)
1652                         icount->cts++;
1653                 if (msr & EDGEPORT_MSR_DELTA_DSR)
1654                         icount->dsr++;
1655                 if (msr & EDGEPORT_MSR_DELTA_CD)
1656                         icount->dcd++;
1657                 if (msr & EDGEPORT_MSR_DELTA_RI)
1658                         icount->rng++;
1659                 wake_up_interruptible (&edge_port->delta_msr_wait);
1660         }
1661
1662         /* Save the new modem status */
1663         edge_port->shadow_msr = msr & 0xf0;
1664
1665         tty = edge_port->port->tty;
1666         /* handle CTS flow control */
1667         if (tty && C_CRTSCTS(tty)) {
1668                 if (msr & EDGEPORT_MSR_CTS) {
1669                         tty->hw_stopped = 0;
1670                         tty_wakeup(tty);
1671                 } else {
1672                         tty->hw_stopped = 1;
1673                 }
1674         }
1675
1676         return;
1677 }
1678
1679 static void handle_new_lsr (struct edgeport_port *edge_port, int lsr_data, __u8 lsr, __u8 data)
1680 {
1681         struct async_icount *icount;
1682         __u8 new_lsr = (__u8)(lsr & (__u8)(LSR_OVER_ERR | LSR_PAR_ERR | LSR_FRM_ERR | LSR_BREAK));
1683
1684         dbg ("%s - %02x", __FUNCTION__, new_lsr);
1685
1686         edge_port->shadow_lsr = lsr;
1687
1688         if (new_lsr & LSR_BREAK) {
1689                 /*
1690                  * Parity and Framing errors only count if they
1691                  * occur exclusive of a break being received.
1692                  */
1693                 new_lsr &= (__u8)(LSR_OVER_ERR | LSR_BREAK);
1694         }
1695
1696         /* Place LSR data byte into Rx buffer */
1697         if (lsr_data && edge_port->port->tty)
1698                 edge_tty_recv(&edge_port->port->dev, edge_port->port->tty, &data, 1);
1699
1700         /* update input line counters */
1701         icount = &edge_port->icount;
1702         if (new_lsr & LSR_BREAK)
1703                 icount->brk++;
1704         if (new_lsr & LSR_OVER_ERR)
1705                 icount->overrun++;
1706         if (new_lsr & LSR_PAR_ERR)
1707                 icount->parity++;
1708         if (new_lsr & LSR_FRM_ERR)
1709                 icount->frame++;
1710 }
1711
1712
1713 static void edge_interrupt_callback (struct urb *urb)
1714 {
1715         struct edgeport_serial *edge_serial = (struct edgeport_serial *)urb->context;
1716         struct usb_serial_port *port;
1717         struct edgeport_port *edge_port;
1718         unsigned char *data = urb->transfer_buffer;
1719         int length = urb->actual_length;
1720         int port_number;
1721         int function;
1722         int retval;
1723         __u8 lsr;
1724         __u8 msr;
1725         int status = urb->status;
1726
1727         dbg("%s", __FUNCTION__);
1728
1729         switch (status) {
1730         case 0:
1731                 /* success */
1732                 break;
1733         case -ECONNRESET:
1734         case -ENOENT:
1735         case -ESHUTDOWN:
1736                 /* this urb is terminated, clean up */
1737                 dbg("%s - urb shutting down with status: %d",
1738                     __FUNCTION__, status);
1739                 return;
1740         default:
1741                 dev_err(&urb->dev->dev, "%s - nonzero urb status received: "
1742                         "%d\n", __FUNCTION__, status);
1743                 goto exit;
1744         }
1745
1746         if (!length) {
1747                 dbg ("%s - no data in urb", __FUNCTION__);
1748                 goto exit;
1749         }
1750
1751         usb_serial_debug_data(debug, &edge_serial->serial->dev->dev, __FUNCTION__, length, data);
1752
1753         if (length != 2) {
1754                 dbg ("%s - expecting packet of size 2, got %d", __FUNCTION__, length);
1755                 goto exit;
1756         }
1757
1758         port_number = TIUMP_GET_PORT_FROM_CODE (data[0]);
1759         function    = TIUMP_GET_FUNC_FROM_CODE (data[0]);
1760         dbg ("%s - port_number %d, function %d, info 0x%x",
1761              __FUNCTION__, port_number, function, data[1]);
1762         port = edge_serial->serial->port[port_number];
1763         edge_port = usb_get_serial_port_data(port);
1764         if (!edge_port) {
1765                 dbg ("%s - edge_port not found", __FUNCTION__);
1766                 return;
1767         }
1768         switch (function) {
1769         case TIUMP_INTERRUPT_CODE_LSR:
1770                 lsr = MapLineStatus(data[1]);
1771                 if (lsr & UMP_UART_LSR_DATA_MASK) {
1772                         /* Save the LSR event for bulk read completion routine */
1773                         dbg ("%s - LSR Event Port %u LSR Status = %02x",
1774                              __FUNCTION__, port_number, lsr);
1775                         edge_port->lsr_event = 1;
1776                         edge_port->lsr_mask = lsr;
1777                 } else {
1778                         dbg ("%s - ===== Port %d LSR Status = %02x ======",
1779                              __FUNCTION__, port_number, lsr);
1780                         handle_new_lsr (edge_port, 0, lsr, 0);
1781                 }
1782                 break;
1783
1784         case TIUMP_INTERRUPT_CODE_MSR:  // MSR
1785                 /* Copy MSR from UMP */
1786                 msr = data[1];
1787                 dbg ("%s - ===== Port %u MSR Status = %02x ======\n",
1788                      __FUNCTION__, port_number, msr);
1789                 handle_new_msr (edge_port, msr);
1790                 break;
1791
1792         default:
1793                 dev_err (&urb->dev->dev, "%s - Unknown Interrupt code from UMP %x\n",
1794                          __FUNCTION__, data[1]);
1795                 break;
1796
1797         }
1798
1799 exit:
1800         retval = usb_submit_urb (urb, GFP_ATOMIC);
1801         if (retval)
1802                 dev_err (&urb->dev->dev, "%s - usb_submit_urb failed with result %d\n",
1803                          __FUNCTION__, retval);
1804 }
1805
1806 static void edge_bulk_in_callback (struct urb *urb)
1807 {
1808         struct edgeport_port *edge_port = (struct edgeport_port *)urb->context;
1809         unsigned char *data = urb->transfer_buffer;
1810         struct tty_struct *tty;
1811         int retval = 0;
1812         int port_number;
1813         int status = urb->status;
1814
1815         dbg("%s", __FUNCTION__);
1816
1817         switch (status) {
1818         case 0:
1819                 /* success */
1820                 break;
1821         case -ECONNRESET:
1822         case -ENOENT:
1823         case -ESHUTDOWN:
1824                 /* this urb is terminated, clean up */
1825                 dbg("%s - urb shutting down with status: %d",
1826                     __FUNCTION__, status);
1827                 return;
1828         default:
1829                 dev_err (&urb->dev->dev,"%s - nonzero read bulk status received: %d\n",
1830                      __FUNCTION__, status);
1831         }
1832
1833         if (status == -EPIPE)
1834                 goto exit;
1835
1836         if (status) {
1837                 dev_err(&urb->dev->dev,"%s - stopping read!\n", __FUNCTION__);
1838                 return;
1839         }
1840
1841         port_number = edge_port->port->number - edge_port->port->serial->minor;
1842
1843         if (edge_port->lsr_event) {
1844                 edge_port->lsr_event = 0;
1845                 dbg ("%s ===== Port %u LSR Status = %02x, Data = %02x ======",
1846                      __FUNCTION__, port_number, edge_port->lsr_mask, *data);
1847                 handle_new_lsr (edge_port, 1, edge_port->lsr_mask, *data);
1848                 /* Adjust buffer length/pointer */
1849                 --urb->actual_length;
1850                 ++data;
1851         }
1852
1853         tty = edge_port->port->tty;
1854         if (tty && urb->actual_length) {
1855                 usb_serial_debug_data(debug, &edge_port->port->dev, __FUNCTION__, urb->actual_length, data);
1856
1857                 if (edge_port->close_pending) {
1858                         dbg ("%s - close is pending, dropping data on the floor.", __FUNCTION__);
1859                 } else {
1860                         edge_tty_recv(&edge_port->port->dev, tty, data, urb->actual_length);
1861                 }
1862                 edge_port->icount.rx += urb->actual_length;
1863         }
1864
1865 exit:
1866         /* continue read unless stopped */
1867         spin_lock(&edge_port->ep_lock);
1868         if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING) {
1869                 urb->dev = edge_port->port->serial->dev;
1870                 retval = usb_submit_urb(urb, GFP_ATOMIC);
1871         } else if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPING) {
1872                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPED;
1873         }
1874         spin_unlock(&edge_port->ep_lock);
1875         if (retval)
1876                 dev_err (&urb->dev->dev, "%s - usb_submit_urb failed with result %d\n",
1877                          __FUNCTION__, retval);
1878 }
1879
1880 static void edge_tty_recv(struct device *dev, struct tty_struct *tty, unsigned char *data, int length)
1881 {
1882         int cnt;
1883
1884         do {
1885                 cnt = tty_buffer_request_room(tty, length);
1886                 if (cnt < length) {
1887                         dev_err(dev, "%s - dropping data, %d bytes lost\n",
1888                                 __FUNCTION__, length - cnt);
1889                         if(cnt == 0)
1890                                 break;
1891                 }
1892                 tty_insert_flip_string(tty, data, cnt);
1893                 data += cnt;
1894                 length -= cnt;
1895         } while (length > 0);
1896
1897         tty_flip_buffer_push(tty);
1898 }
1899
1900 static void edge_bulk_out_callback (struct urb *urb)
1901 {
1902         struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
1903         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1904         int status = urb->status;
1905
1906         dbg ("%s - port %d", __FUNCTION__, port->number);
1907
1908         edge_port->ep_write_urb_in_use = 0;
1909
1910         switch (status) {
1911         case 0:
1912                 /* success */
1913                 break;
1914         case -ECONNRESET:
1915         case -ENOENT:
1916         case -ESHUTDOWN:
1917                 /* this urb is terminated, clean up */
1918                 dbg("%s - urb shutting down with status: %d",
1919                     __FUNCTION__, status);
1920                 return;
1921         default:
1922                 dev_err(&urb->dev->dev, "%s - nonzero write bulk status "
1923                         "received: %d\n", __FUNCTION__, status);
1924         }
1925
1926         /* send any buffered data */
1927         edge_send(port);
1928 }
1929
1930 static int edge_open (struct usb_serial_port *port, struct file * filp)
1931 {
1932         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
1933         struct edgeport_serial *edge_serial;
1934         struct usb_device *dev;
1935         struct urb *urb;
1936         int port_number;
1937         int status;
1938         u16 open_settings;
1939         u8 transaction_timeout;
1940
1941         dbg("%s - port %d", __FUNCTION__, port->number);
1942
1943         if (edge_port == NULL)
1944                 return -ENODEV;
1945
1946         if (port->tty)
1947                 port->tty->low_latency = low_latency;
1948
1949         port_number = port->number - port->serial->minor;
1950         switch (port_number) {
1951                 case 0:
1952                         edge_port->uart_base = UMPMEM_BASE_UART1;
1953                         edge_port->dma_address = UMPD_OEDB1_ADDRESS;
1954                         break;
1955                 case 1:
1956                         edge_port->uart_base = UMPMEM_BASE_UART2;
1957                         edge_port->dma_address = UMPD_OEDB2_ADDRESS;
1958                         break;
1959                 default:
1960                         dev_err (&port->dev, "Unknown port number!!!\n");
1961                         return -ENODEV;
1962         }
1963
1964         dbg ("%s - port_number = %d, uart_base = %04x, dma_address = %04x",
1965              __FUNCTION__, port_number, edge_port->uart_base, edge_port->dma_address);
1966
1967         dev = port->serial->dev;
1968
1969         memset (&(edge_port->icount), 0x00, sizeof(edge_port->icount));
1970         init_waitqueue_head (&edge_port->delta_msr_wait);
1971
1972         /* turn off loopback */
1973         status = TIClearLoopBack (edge_port);
1974         if (status) {
1975                 dev_err(&port->dev,"%s - cannot send clear loopback command, %d\n",
1976                         __FUNCTION__, status);
1977                 return status;
1978         }
1979
1980         /* set up the port settings */
1981         edge_set_termios (port, port->tty->termios);
1982
1983         /* open up the port */
1984
1985         /* milliseconds to timeout for DMA transfer */
1986         transaction_timeout = 2;
1987
1988         edge_port->ump_read_timeout = max (20, ((transaction_timeout * 3) / 2) );
1989
1990         // milliseconds to timeout for DMA transfer
1991         open_settings = (u8)(UMP_DMA_MODE_CONTINOUS |
1992                              UMP_PIPE_TRANS_TIMEOUT_ENA |
1993                              (transaction_timeout << 2));
1994
1995         dbg ("%s - Sending UMPC_OPEN_PORT", __FUNCTION__);
1996
1997         /* Tell TI to open and start the port */
1998         status = TIWriteCommandSync (dev,
1999                                         UMPC_OPEN_PORT,
2000                                         (u8)(UMPM_UART1_PORT + port_number),
2001                                         open_settings,
2002                                         NULL,
2003                                         0);
2004         if (status) {
2005                 dev_err(&port->dev,"%s - cannot send open command, %d\n", __FUNCTION__, status);
2006                 return status;
2007         }
2008
2009         /* Start the DMA? */
2010         status = TIWriteCommandSync (dev,
2011                                         UMPC_START_PORT,
2012                                         (u8)(UMPM_UART1_PORT + port_number),
2013                                         0,
2014                                         NULL,
2015                                         0);
2016         if (status) {
2017                 dev_err(&port->dev,"%s - cannot send start DMA command, %d\n", __FUNCTION__, status);
2018                 return status;
2019         }
2020
2021         /* Clear TX and RX buffers in UMP */
2022         status = TIPurgeDataSync (port, UMP_PORT_DIR_OUT | UMP_PORT_DIR_IN);
2023         if (status) {
2024                 dev_err(&port->dev,"%s - cannot send clear buffers command, %d\n", __FUNCTION__, status);
2025                 return status;
2026         }
2027
2028         /* Read Initial MSR */
2029         status = TIReadVendorRequestSync (dev,
2030                                         UMPC_READ_MSR,  // Request
2031                                         0,              // wValue
2032                                         (__u16)(UMPM_UART1_PORT + port_number), // wIndex (Address)
2033                                         &edge_port->shadow_msr,                 // TransferBuffer
2034                                         1);                                     // TransferBufferLength
2035         if (status) {
2036                 dev_err(&port->dev,"%s - cannot send read MSR command, %d\n", __FUNCTION__, status);
2037                 return status;
2038         }
2039
2040         dbg ("ShadowMSR 0x%X", edge_port->shadow_msr);
2041
2042         /* Set Initial MCR */
2043         edge_port->shadow_mcr = MCR_RTS | MCR_DTR;
2044         dbg ("ShadowMCR 0x%X", edge_port->shadow_mcr);
2045
2046         edge_serial = edge_port->edge_serial;
2047         if (mutex_lock_interruptible(&edge_serial->es_lock))
2048                 return -ERESTARTSYS;
2049         if (edge_serial->num_ports_open == 0) {
2050                 /* we are the first port to be opened, let's post the interrupt urb */
2051                 urb = edge_serial->serial->port[0]->interrupt_in_urb;
2052                 if (!urb) {
2053                         dev_err (&port->dev, "%s - no interrupt urb present, exiting\n", __FUNCTION__);
2054                         status = -EINVAL;
2055                         goto release_es_lock;
2056                 }
2057                 urb->complete = edge_interrupt_callback;
2058                 urb->context = edge_serial;
2059                 urb->dev = dev;
2060                 status = usb_submit_urb (urb, GFP_KERNEL);
2061                 if (status) {
2062                         dev_err (&port->dev, "%s - usb_submit_urb failed with value %d\n", __FUNCTION__, status);
2063                         goto release_es_lock;
2064                 }
2065         }
2066
2067         /*
2068          * reset the data toggle on the bulk endpoints to work around bug in
2069          * host controllers where things get out of sync some times
2070          */
2071         usb_clear_halt (dev, port->write_urb->pipe);
2072         usb_clear_halt (dev, port->read_urb->pipe);
2073
2074         /* start up our bulk read urb */
2075         urb = port->read_urb;
2076         if (!urb) {
2077                 dev_err (&port->dev, "%s - no read urb present, exiting\n", __FUNCTION__);
2078                 status = -EINVAL;
2079                 goto unlink_int_urb;
2080         }
2081         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
2082         urb->complete = edge_bulk_in_callback;
2083         urb->context = edge_port;
2084         urb->dev = dev;
2085         status = usb_submit_urb (urb, GFP_KERNEL);
2086         if (status) {
2087                 dev_err (&port->dev, "%s - read bulk usb_submit_urb failed with value %d\n", __FUNCTION__, status);
2088                 goto unlink_int_urb;
2089         }
2090
2091         ++edge_serial->num_ports_open;
2092
2093         dbg("%s - exited", __FUNCTION__);
2094
2095         goto release_es_lock;
2096
2097 unlink_int_urb:
2098         if (edge_port->edge_serial->num_ports_open == 0)
2099                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
2100 release_es_lock:
2101         mutex_unlock(&edge_serial->es_lock);
2102         return status;
2103 }
2104
2105 static void edge_close (struct usb_serial_port *port, struct file *filp)
2106 {
2107         struct edgeport_serial *edge_serial;
2108         struct edgeport_port *edge_port;
2109         int port_number;
2110         int status;
2111
2112         dbg("%s - port %d", __FUNCTION__, port->number);
2113
2114         edge_serial = usb_get_serial_data(port->serial);
2115         edge_port = usb_get_serial_port_data(port);
2116         if ((edge_serial == NULL) || (edge_port == NULL))
2117                 return;
2118
2119         /* The bulkreadcompletion routine will check
2120          * this flag and dump add read data */
2121         edge_port->close_pending = 1;
2122
2123         /* chase the port close and flush */
2124         TIChasePort (edge_port, (HZ*closing_wait)/100, 1);
2125
2126         usb_kill_urb(port->read_urb);
2127         usb_kill_urb(port->write_urb);
2128         edge_port->ep_write_urb_in_use = 0;
2129
2130         /* assuming we can still talk to the device,
2131          * send a close port command to it */
2132         dbg("%s - send umpc_close_port", __FUNCTION__);
2133         port_number = port->number - port->serial->minor;
2134         status = TIWriteCommandSync (port->serial->dev,
2135                                      UMPC_CLOSE_PORT,
2136                                      (__u8)(UMPM_UART1_PORT + port_number),
2137                                      0,
2138                                      NULL,
2139                                      0);
2140         mutex_lock(&edge_serial->es_lock);
2141         --edge_port->edge_serial->num_ports_open;
2142         if (edge_port->edge_serial->num_ports_open <= 0) {
2143                 /* last port is now closed, let's shut down our interrupt urb */
2144                 usb_kill_urb(port->serial->port[0]->interrupt_in_urb);
2145                 edge_port->edge_serial->num_ports_open = 0;
2146         }
2147         mutex_unlock(&edge_serial->es_lock);
2148         edge_port->close_pending = 0;
2149
2150         dbg("%s - exited", __FUNCTION__);
2151 }
2152
2153 static int edge_write (struct usb_serial_port *port, const unsigned char *data, int count)
2154 {
2155         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2156         unsigned long flags;
2157
2158         dbg("%s - port %d", __FUNCTION__, port->number);
2159
2160         if (count == 0) {
2161                 dbg("%s - write request of 0 bytes", __FUNCTION__);
2162                 return 0;
2163         }
2164
2165         if (edge_port == NULL)
2166                 return -ENODEV;
2167         if (edge_port->close_pending == 1)
2168                 return -ENODEV;
2169
2170         spin_lock_irqsave(&edge_port->ep_lock, flags);
2171         count = edge_buf_put(edge_port->ep_out_buf, data, count);
2172         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2173
2174         edge_send(port);
2175
2176         return count;
2177 }
2178
2179 static void edge_send(struct usb_serial_port *port)
2180 {
2181         int count, result;
2182         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2183         struct tty_struct *tty = port->tty;
2184         unsigned long flags;
2185
2186
2187         dbg("%s - port %d", __FUNCTION__, port->number);
2188
2189         spin_lock_irqsave(&edge_port->ep_lock, flags);
2190
2191         if (edge_port->ep_write_urb_in_use) {
2192                 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2193                 return;
2194         }
2195
2196         count = edge_buf_get(edge_port->ep_out_buf,
2197                                 port->write_urb->transfer_buffer,
2198                                 port->bulk_out_size);
2199
2200         if (count == 0) {
2201                 spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2202                 return;
2203         }
2204
2205         edge_port->ep_write_urb_in_use = 1;
2206
2207         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2208
2209         usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, port->write_urb->transfer_buffer);
2210
2211         /* set up our urb */
2212         usb_fill_bulk_urb (port->write_urb, port->serial->dev,
2213                            usb_sndbulkpipe (port->serial->dev,
2214                                             port->bulk_out_endpointAddress),
2215                            port->write_urb->transfer_buffer, count,
2216                            edge_bulk_out_callback,
2217                            port);
2218
2219         /* send the data out the bulk port */
2220         result = usb_submit_urb(port->write_urb, GFP_ATOMIC);
2221         if (result) {
2222                 dev_err(&port->dev, "%s - failed submitting write urb, error %d\n", __FUNCTION__, result);
2223                 edge_port->ep_write_urb_in_use = 0;
2224                 // TODO: reschedule edge_send
2225         } else {
2226                 edge_port->icount.tx += count;
2227         }
2228
2229         /* wakeup any process waiting for writes to complete */
2230         /* there is now more room in the buffer for new writes */
2231         if (tty) {
2232                 /* let the tty driver wakeup if it has a special write_wakeup function */
2233                 tty_wakeup(tty);
2234         }
2235 }
2236
2237 static int edge_write_room (struct usb_serial_port *port)
2238 {
2239         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2240         int room = 0;
2241         unsigned long flags;
2242
2243         dbg("%s - port %d", __FUNCTION__, port->number);
2244
2245         if (edge_port == NULL)
2246                 return -ENODEV;
2247         if (edge_port->close_pending == 1)
2248                 return -ENODEV;
2249
2250         spin_lock_irqsave(&edge_port->ep_lock, flags);
2251         room = edge_buf_space_avail(edge_port->ep_out_buf);
2252         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2253
2254         dbg("%s - returns %d", __FUNCTION__, room);
2255         return room;
2256 }
2257
2258 static int edge_chars_in_buffer (struct usb_serial_port *port)
2259 {
2260         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2261         int chars = 0;
2262         unsigned long flags;
2263
2264         dbg("%s - port %d", __FUNCTION__, port->number);
2265
2266         if (edge_port == NULL)
2267                 return -ENODEV;
2268         if (edge_port->close_pending == 1)
2269                 return -ENODEV;
2270
2271         spin_lock_irqsave(&edge_port->ep_lock, flags);
2272         chars = edge_buf_data_avail(edge_port->ep_out_buf);
2273         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2274
2275         dbg ("%s - returns %d", __FUNCTION__, chars);
2276         return chars;
2277 }
2278
2279 static void edge_throttle (struct usb_serial_port *port)
2280 {
2281         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2282         struct tty_struct *tty;
2283         int status;
2284
2285         dbg("%s - port %d", __FUNCTION__, port->number);
2286
2287         if (edge_port == NULL)
2288                 return;
2289
2290         tty = port->tty;
2291         if (!tty) {
2292                 dbg ("%s - no tty available", __FUNCTION__);
2293                 return;
2294         }
2295
2296         /* if we are implementing XON/XOFF, send the stop character */
2297         if (I_IXOFF(tty)) {
2298                 unsigned char stop_char = STOP_CHAR(tty);
2299                 status = edge_write (port, &stop_char, 1);
2300                 if (status <= 0) {
2301                         dev_err(&port->dev, "%s - failed to write stop character, %d\n", __FUNCTION__, status);
2302                 }
2303         }
2304
2305         /* if we are implementing RTS/CTS, stop reads */
2306         /* and the Edgeport will clear the RTS line */
2307         if (C_CRTSCTS(tty))
2308                 stop_read(edge_port);
2309
2310 }
2311
2312 static void edge_unthrottle (struct usb_serial_port *port)
2313 {
2314         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2315         struct tty_struct *tty;
2316         int status;
2317
2318         dbg("%s - port %d", __FUNCTION__, port->number);
2319
2320         if (edge_port == NULL)
2321                 return;
2322
2323         tty = port->tty;
2324         if (!tty) {
2325                 dbg ("%s - no tty available", __FUNCTION__);
2326                 return;
2327         }
2328
2329         /* if we are implementing XON/XOFF, send the start character */
2330         if (I_IXOFF(tty)) {
2331                 unsigned char start_char = START_CHAR(tty);
2332                 status = edge_write (port, &start_char, 1);
2333                 if (status <= 0) {
2334                         dev_err(&port->dev, "%s - failed to write start character, %d\n", __FUNCTION__, status);
2335                 }
2336         }
2337
2338         /* if we are implementing RTS/CTS, restart reads */
2339         /* are the Edgeport will assert the RTS line */
2340         if (C_CRTSCTS(tty)) {
2341                 status = restart_read(edge_port);
2342                 if (status)
2343                         dev_err(&port->dev, "%s - read bulk usb_submit_urb failed with value %d\n", __FUNCTION__, status);
2344         }
2345
2346 }
2347
2348 static void stop_read(struct edgeport_port *edge_port)
2349 {
2350         unsigned long flags;
2351
2352         spin_lock_irqsave(&edge_port->ep_lock, flags);
2353
2354         if (edge_port->ep_read_urb_state == EDGE_READ_URB_RUNNING)
2355                 edge_port->ep_read_urb_state = EDGE_READ_URB_STOPPING;
2356         edge_port->shadow_mcr &= ~MCR_RTS;
2357
2358         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2359 }
2360
2361 static int restart_read(struct edgeport_port *edge_port)
2362 {
2363         struct urb *urb;
2364         int status = 0;
2365         unsigned long flags;
2366
2367         spin_lock_irqsave(&edge_port->ep_lock, flags);
2368
2369         if (edge_port->ep_read_urb_state == EDGE_READ_URB_STOPPED) {
2370                 urb = edge_port->port->read_urb;
2371                 urb->complete = edge_bulk_in_callback;
2372                 urb->context = edge_port;
2373                 urb->dev = edge_port->port->serial->dev;
2374                 status = usb_submit_urb(urb, GFP_ATOMIC);
2375         }
2376         edge_port->ep_read_urb_state = EDGE_READ_URB_RUNNING;
2377         edge_port->shadow_mcr |= MCR_RTS;
2378
2379         spin_unlock_irqrestore(&edge_port->ep_lock, flags);
2380
2381         return status;
2382 }
2383
2384 static void change_port_settings (struct edgeport_port *edge_port, struct ktermios *old_termios)
2385 {
2386         struct ump_uart_config *config;
2387         struct tty_struct *tty;
2388         int baud;
2389         unsigned cflag;
2390         int status;
2391         int port_number = edge_port->port->number - edge_port->port->serial->minor;
2392
2393         dbg("%s - port %d", __FUNCTION__, edge_port->port->number);
2394
2395         tty = edge_port->port->tty;
2396
2397         config = kmalloc (sizeof (*config), GFP_KERNEL);
2398         if (!config) {
2399                 dev_err (&edge_port->port->dev, "%s - out of memory\n", __FUNCTION__);
2400                 return;
2401         }
2402
2403         cflag = tty->termios->c_cflag;
2404
2405         config->wFlags = 0;
2406
2407         /* These flags must be set */
2408         config->wFlags |= UMP_MASK_UART_FLAGS_RECEIVE_MS_INT;
2409         config->wFlags |= UMP_MASK_UART_FLAGS_AUTO_START_ON_ERR;
2410         config->bUartMode = (__u8)(edge_port->bUartMode);
2411
2412         switch (cflag & CSIZE) {
2413                 case CS5:
2414                             config->bDataBits = UMP_UART_CHAR5BITS;
2415                             dbg ("%s - data bits = 5", __FUNCTION__);
2416                             break;
2417                 case CS6:
2418                             config->bDataBits = UMP_UART_CHAR6BITS;
2419                             dbg ("%s - data bits = 6", __FUNCTION__);
2420                             break;
2421                 case CS7:
2422                             config->bDataBits = UMP_UART_CHAR7BITS;
2423                             dbg ("%s - data bits = 7", __FUNCTION__);
2424                             break;
2425                 default:
2426                 case CS8:
2427                             config->bDataBits = UMP_UART_CHAR8BITS;
2428                             dbg ("%s - data bits = 8", __FUNCTION__);
2429                             break;
2430         }
2431
2432         if (cflag & PARENB) {
2433                 if (cflag & PARODD) {
2434                         config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2435                         config->bParity = UMP_UART_ODDPARITY;
2436                         dbg("%s - parity = odd", __FUNCTION__);
2437                 } else {
2438                         config->wFlags |= UMP_MASK_UART_FLAGS_PARITY;
2439                         config->bParity = UMP_UART_EVENPARITY;
2440                         dbg("%s - parity = even", __FUNCTION__);
2441                 }
2442         } else {
2443                 config->bParity = UMP_UART_NOPARITY;
2444                 dbg("%s - parity = none", __FUNCTION__);
2445         }
2446
2447         if (cflag & CSTOPB) {
2448                 config->bStopBits = UMP_UART_STOPBIT2;
2449                 dbg("%s - stop bits = 2", __FUNCTION__);
2450         } else {
2451                 config->bStopBits = UMP_UART_STOPBIT1;
2452                 dbg("%s - stop bits = 1", __FUNCTION__);
2453         }
2454
2455         /* figure out the flow control settings */
2456         if (cflag & CRTSCTS) {
2457                 config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X_CTS_FLOW;
2458                 config->wFlags |= UMP_MASK_UART_FLAGS_RTS_FLOW;
2459                 dbg("%s - RTS/CTS is enabled", __FUNCTION__);
2460         } else {
2461                 dbg("%s - RTS/CTS is disabled", __FUNCTION__);
2462                 tty->hw_stopped = 0;
2463                 restart_read(edge_port);
2464         }
2465
2466         /* if we are implementing XON/XOFF, set the start and stop character in the device */
2467         if (I_IXOFF(tty) || I_IXON(tty)) {
2468                 config->cXon  = START_CHAR(tty);
2469                 config->cXoff = STOP_CHAR(tty);
2470
2471                 /* if we are implementing INBOUND XON/XOFF */
2472                 if (I_IXOFF(tty)) {
2473                         config->wFlags |= UMP_MASK_UART_FLAGS_IN_X;
2474                         dbg ("%s - INBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2475                              __FUNCTION__, config->cXon, config->cXoff);
2476                 } else {
2477                         dbg ("%s - INBOUND XON/XOFF is disabled", __FUNCTION__);
2478                 }
2479
2480                 /* if we are implementing OUTBOUND XON/XOFF */
2481                 if (I_IXON(tty)) {
2482                         config->wFlags |= UMP_MASK_UART_FLAGS_OUT_X;
2483                         dbg ("%s - OUTBOUND XON/XOFF is enabled, XON = %2x, XOFF = %2x",
2484                              __FUNCTION__, config->cXon, config->cXoff);
2485                 } else {
2486                         dbg ("%s - OUTBOUND XON/XOFF is disabled", __FUNCTION__);
2487                 }
2488         }
2489
2490         tty->termios->c_cflag &= ~CMSPAR;
2491
2492         /* Round the baud rate */
2493         baud = tty_get_baud_rate(tty);
2494         if (!baud) {
2495                 /* pick a default, any default... */
2496                 baud = 9600;
2497         } else
2498                 tty_encode_baud_rate(tty, baud, baud);
2499
2500         edge_port->baud_rate = baud;
2501         config->wBaudRate = (__u16)((461550L + baud/2) / baud);
2502
2503         /* FIXME: Recompute actual baud from divisor here */
2504
2505         dbg ("%s - baud rate = %d, wBaudRate = %d", __FUNCTION__, baud, config->wBaudRate);
2506
2507         dbg ("wBaudRate:   %d", (int)(461550L / config->wBaudRate));
2508         dbg ("wFlags:    0x%x", config->wFlags);
2509         dbg ("bDataBits:   %d", config->bDataBits);
2510         dbg ("bParity:     %d", config->bParity);
2511         dbg ("bStopBits:   %d", config->bStopBits);
2512         dbg ("cXon:        %d", config->cXon);
2513         dbg ("cXoff:       %d", config->cXoff);
2514         dbg ("bUartMode:   %d", config->bUartMode);
2515
2516         /* move the word values into big endian mode */
2517         cpu_to_be16s (&config->wFlags);
2518         cpu_to_be16s (&config->wBaudRate);
2519
2520         status = TIWriteCommandSync (edge_port->port->serial->dev,
2521                                 UMPC_SET_CONFIG,
2522                                 (__u8)(UMPM_UART1_PORT + port_number),
2523                                 0,
2524                                 (__u8 *)config,
2525                                 sizeof(*config));
2526         if (status) {
2527                 dbg ("%s - error %d when trying to write config to device",
2528                      __FUNCTION__, status);
2529         }
2530
2531         kfree (config);
2532
2533         return;
2534 }
2535
2536 static void edge_set_termios (struct usb_serial_port *port, struct ktermios *old_termios)
2537 {
2538         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2539         struct tty_struct *tty = port->tty;
2540         unsigned int cflag;
2541
2542         cflag = tty->termios->c_cflag;
2543
2544         dbg("%s - clfag %08x iflag %08x", __FUNCTION__,
2545             tty->termios->c_cflag, tty->termios->c_iflag);
2546         dbg("%s - old clfag %08x old iflag %08x", __FUNCTION__,
2547             old_termios->c_cflag, old_termios->c_iflag);
2548
2549         dbg("%s - port %d", __FUNCTION__, port->number);
2550
2551         if (edge_port == NULL)
2552                 return;
2553
2554         /* change the port settings to the new ones specified */
2555         change_port_settings (edge_port, old_termios);
2556
2557         return;
2558 }
2559
2560 static int edge_tiocmset (struct usb_serial_port *port, struct file *file, unsigned int set, unsigned int clear)
2561 {
2562         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2563         unsigned int mcr;
2564
2565         dbg("%s - port %d", __FUNCTION__, port->number);
2566
2567         mcr = edge_port->shadow_mcr;
2568         if (set & TIOCM_RTS)
2569                 mcr |= MCR_RTS;
2570         if (set & TIOCM_DTR)
2571                 mcr |= MCR_DTR;
2572         if (set & TIOCM_LOOP)
2573                 mcr |= MCR_LOOPBACK;
2574
2575         if (clear & TIOCM_RTS)
2576                 mcr &= ~MCR_RTS;
2577         if (clear & TIOCM_DTR)
2578                 mcr &= ~MCR_DTR;
2579         if (clear & TIOCM_LOOP)
2580                 mcr &= ~MCR_LOOPBACK;
2581
2582         edge_port->shadow_mcr = mcr;
2583
2584         TIRestoreMCR (edge_port, mcr);
2585
2586         return 0;
2587 }
2588
2589 static int edge_tiocmget(struct usb_serial_port *port, struct file *file)
2590 {
2591         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2592         unsigned int result = 0;
2593         unsigned int msr;
2594         unsigned int mcr;
2595
2596         dbg("%s - port %d", __FUNCTION__, port->number);
2597
2598         msr = edge_port->shadow_msr;
2599         mcr = edge_port->shadow_mcr;
2600         result = ((mcr & MCR_DTR)       ? TIOCM_DTR: 0)   /* 0x002 */
2601                   | ((mcr & MCR_RTS)    ? TIOCM_RTS: 0)   /* 0x004 */
2602                   | ((msr & EDGEPORT_MSR_CTS)   ? TIOCM_CTS: 0)   /* 0x020 */
2603                   | ((msr & EDGEPORT_MSR_CD)    ? TIOCM_CAR: 0)   /* 0x040 */
2604                   | ((msr & EDGEPORT_MSR_RI)    ? TIOCM_RI:  0)   /* 0x080 */
2605                   | ((msr & EDGEPORT_MSR_DSR)   ? TIOCM_DSR: 0);  /* 0x100 */
2606
2607
2608         dbg("%s -- %x", __FUNCTION__, result);
2609
2610         return result;
2611 }
2612
2613 static int get_serial_info (struct edgeport_port *edge_port, struct serial_struct __user *retinfo)
2614 {
2615         struct serial_struct tmp;
2616
2617         if (!retinfo)
2618                 return -EFAULT;
2619
2620         memset(&tmp, 0, sizeof(tmp));
2621
2622         tmp.type                = PORT_16550A;
2623         tmp.line                = edge_port->port->serial->minor;
2624         tmp.port                = edge_port->port->number;
2625         tmp.irq                 = 0;
2626         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
2627         tmp.xmit_fifo_size      = edge_port->port->bulk_out_size;
2628         tmp.baud_base           = 9600;
2629         tmp.close_delay         = 5*HZ;
2630         tmp.closing_wait        = closing_wait;
2631 //      tmp.custom_divisor      = state->custom_divisor;
2632 //      tmp.hub6                = state->hub6;
2633 //      tmp.io_type             = state->io_type;
2634
2635
2636         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2637                 return -EFAULT;
2638         return 0;
2639 }
2640
2641 static int edge_ioctl (struct usb_serial_port *port, struct file *file, unsigned int cmd, unsigned long arg)
2642 {
2643         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2644         struct async_icount cnow;
2645         struct async_icount cprev;
2646
2647         dbg("%s - port %d, cmd = 0x%x", __FUNCTION__, port->number, cmd);
2648
2649         switch (cmd) {
2650                 case TIOCINQ:
2651                         dbg("%s - (%d) TIOCINQ", __FUNCTION__, port->number);
2652 //                      return get_number_bytes_avail(edge_port, (unsigned int *) arg);
2653                         break;
2654
2655                 case TIOCSERGETLSR:
2656                         dbg("%s - (%d) TIOCSERGETLSR", __FUNCTION__, port->number);
2657 //                      return get_lsr_info(edge_port, (unsigned int *) arg);
2658                         break;
2659
2660                 case TIOCGSERIAL:
2661                         dbg("%s - (%d) TIOCGSERIAL", __FUNCTION__, port->number);
2662                         return get_serial_info(edge_port, (struct serial_struct __user *) arg);
2663                         break;
2664
2665                 case TIOCSSERIAL:
2666                         dbg("%s - (%d) TIOCSSERIAL", __FUNCTION__, port->number);
2667                         break;
2668
2669                 case TIOCMIWAIT:
2670                         dbg("%s - (%d) TIOCMIWAIT", __FUNCTION__, port->number);
2671                         cprev = edge_port->icount;
2672                         while (1) {
2673                                 interruptible_sleep_on(&edge_port->delta_msr_wait);
2674                                 /* see if a signal did it */
2675                                 if (signal_pending(current))
2676                                         return -ERESTARTSYS;
2677                                 cnow = edge_port->icount;
2678                                 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2679                                     cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2680                                         return -EIO; /* no change => error */
2681                                 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2682                                     ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2683                                     ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
2684                                     ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
2685                                         return 0;
2686                                 }
2687                                 cprev = cnow;
2688                         }
2689                         /* not reached */
2690                         break;
2691
2692                 case TIOCGICOUNT:
2693                         dbg ("%s - (%d) TIOCGICOUNT RX=%d, TX=%d", __FUNCTION__,
2694                              port->number, edge_port->icount.rx, edge_port->icount.tx);
2695                         if (copy_to_user((void __user *)arg, &edge_port->icount, sizeof(edge_port->icount)))
2696                                 return -EFAULT;
2697                         return 0;
2698         }
2699
2700         return -ENOIOCTLCMD;
2701 }
2702
2703 static void edge_break (struct usb_serial_port *port, int break_state)
2704 {
2705         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2706         int status;
2707
2708         dbg ("%s - state = %d", __FUNCTION__, break_state);
2709
2710         /* chase the port close */
2711         TIChasePort (edge_port, 0, 0);
2712
2713         if (break_state == -1) {
2714                 status = TISetBreak (edge_port);
2715         } else {
2716                 status = TIClearBreak (edge_port);
2717         }
2718         if (status) {
2719                 dbg ("%s - error %d sending break set/clear command.",
2720                      __FUNCTION__, status);
2721         }
2722 }
2723
2724 static int edge_startup (struct usb_serial *serial)
2725 {
2726         struct edgeport_serial *edge_serial;
2727         struct edgeport_port *edge_port;
2728         struct usb_device *dev;
2729         int status;
2730         int i;
2731
2732         dev = serial->dev;
2733
2734         /* create our private serial structure */
2735         edge_serial = kzalloc(sizeof(struct edgeport_serial), GFP_KERNEL);
2736         if (edge_serial == NULL) {
2737                 dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
2738                 return -ENOMEM;
2739         }
2740         mutex_init(&edge_serial->es_lock);
2741         edge_serial->serial = serial;
2742         usb_set_serial_data(serial, edge_serial);
2743
2744         status = TIDownloadFirmware (edge_serial);
2745         if (status) {
2746                 kfree (edge_serial);
2747                 return status;
2748         }
2749
2750         /* set up our port private structures */
2751         for (i = 0; i < serial->num_ports; ++i) {
2752                 edge_port = kzalloc(sizeof(struct edgeport_port), GFP_KERNEL);
2753                 if (edge_port == NULL) {
2754                         dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
2755                         goto cleanup;
2756                 }
2757                 spin_lock_init(&edge_port->ep_lock);
2758                 edge_port->ep_out_buf = edge_buf_alloc(EDGE_OUT_BUF_SIZE);
2759                 if (edge_port->ep_out_buf == NULL) {
2760                         dev_err(&serial->dev->dev, "%s - Out of memory\n", __FUNCTION__);
2761                         kfree(edge_port);
2762                         goto cleanup;
2763                 }
2764                 edge_port->port = serial->port[i];
2765                 edge_port->edge_serial = edge_serial;
2766                 usb_set_serial_port_data(serial->port[i], edge_port);
2767                 edge_port->bUartMode = default_uart_mode;
2768         }
2769
2770         return 0;
2771
2772 cleanup:
2773         for (--i; i>=0; --i) {
2774                 edge_port = usb_get_serial_port_data(serial->port[i]);
2775                 edge_buf_free(edge_port->ep_out_buf);
2776                 kfree(edge_port);
2777                 usb_set_serial_port_data(serial->port[i], NULL);
2778         }
2779         kfree (edge_serial);
2780         usb_set_serial_data(serial, NULL);
2781         return -ENOMEM;
2782 }
2783
2784 static void edge_shutdown (struct usb_serial *serial)
2785 {
2786         int i;
2787         struct edgeport_port *edge_port;
2788
2789         dbg ("%s", __FUNCTION__);
2790
2791         for (i = 0; i < serial->num_ports; ++i) {
2792                 edge_port = usb_get_serial_port_data(serial->port[i]);
2793                 edge_remove_sysfs_attrs(edge_port->port);
2794                 edge_buf_free(edge_port->ep_out_buf);
2795                 kfree(edge_port);
2796                 usb_set_serial_port_data(serial->port[i], NULL);
2797         }
2798         kfree(usb_get_serial_data(serial));
2799         usb_set_serial_data(serial, NULL);
2800 }
2801
2802
2803 /* Sysfs Attributes */
2804
2805 static ssize_t show_uart_mode(struct device *dev,
2806         struct device_attribute *attr, char *buf)
2807 {
2808         struct usb_serial_port *port = to_usb_serial_port(dev);
2809         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2810
2811         return sprintf(buf, "%d\n", edge_port->bUartMode);
2812 }
2813
2814 static ssize_t store_uart_mode(struct device *dev,
2815         struct device_attribute *attr, const char *valbuf, size_t count)
2816 {
2817         struct usb_serial_port *port = to_usb_serial_port(dev);
2818         struct edgeport_port *edge_port = usb_get_serial_port_data(port);
2819         unsigned int v = simple_strtoul(valbuf, NULL, 0);
2820
2821         dbg("%s: setting uart_mode = %d", __FUNCTION__, v);
2822
2823         if (v < 256)
2824                 edge_port->bUartMode = v;
2825         else
2826                 dev_err(dev, "%s - uart_mode %d is invalid\n", __FUNCTION__, v);
2827
2828         return count;
2829 }
2830
2831 static DEVICE_ATTR(uart_mode, S_IWUSR | S_IRUGO, show_uart_mode, store_uart_mode);
2832
2833 static int edge_create_sysfs_attrs(struct usb_serial_port *port)
2834 {
2835         return device_create_file(&port->dev, &dev_attr_uart_mode);
2836 }
2837
2838 static int edge_remove_sysfs_attrs(struct usb_serial_port *port)
2839 {
2840         device_remove_file(&port->dev, &dev_attr_uart_mode);
2841         return 0;
2842 }
2843
2844
2845 /* Circular Buffer */
2846
2847 /*
2848  * edge_buf_alloc
2849  *
2850  * Allocate a circular buffer and all associated memory.
2851  */
2852
2853 static struct edge_buf *edge_buf_alloc(unsigned int size)
2854 {
2855         struct edge_buf *eb;
2856
2857
2858         if (size == 0)
2859                 return NULL;
2860
2861         eb = kmalloc(sizeof(struct edge_buf), GFP_KERNEL);
2862         if (eb == NULL)
2863                 return NULL;
2864
2865         eb->buf_buf = kmalloc(size, GFP_KERNEL);
2866         if (eb->buf_buf == NULL) {
2867                 kfree(eb);
2868                 return NULL;
2869         }
2870
2871         eb->buf_size = size;
2872         eb->buf_get = eb->buf_put = eb->buf_buf;
2873
2874         return eb;
2875 }
2876
2877
2878 /*
2879  * edge_buf_free
2880  *
2881  * Free the buffer and all associated memory.
2882  */
2883
2884 static void edge_buf_free(struct edge_buf *eb)
2885 {
2886         if (eb) {
2887                 kfree(eb->buf_buf);
2888                 kfree(eb);
2889         }
2890 }
2891
2892
2893 /*
2894  * edge_buf_clear
2895  *
2896  * Clear out all data in the circular buffer.
2897  */
2898
2899 static void edge_buf_clear(struct edge_buf *eb)
2900 {
2901         if (eb != NULL)
2902                 eb->buf_get = eb->buf_put;
2903                 /* equivalent to a get of all data available */
2904 }
2905
2906
2907 /*
2908  * edge_buf_data_avail
2909  *
2910  * Return the number of bytes of data available in the circular
2911  * buffer.
2912  */
2913
2914 static unsigned int edge_buf_data_avail(struct edge_buf *eb)
2915 {
2916         if (eb != NULL)
2917                 return ((eb->buf_size + eb->buf_put - eb->buf_get) % eb->buf_size);
2918         else
2919                 return 0;
2920 }
2921
2922
2923 /*
2924  * edge_buf_space_avail
2925  *
2926  * Return the number of bytes of space available in the circular
2927  * buffer.
2928  */
2929
2930 static unsigned int edge_buf_space_avail(struct edge_buf *eb)
2931 {
2932         if (eb != NULL)
2933                 return ((eb->buf_size + eb->buf_get - eb->buf_put - 1) % eb->buf_size);
2934         else
2935                 return 0;
2936 }
2937
2938
2939 /*
2940  * edge_buf_put
2941  *
2942  * Copy data data from a user buffer and put it into the circular buffer.
2943  * Restrict to the amount of space available.
2944  *
2945  * Return the number of bytes copied.
2946  */
2947
2948 static unsigned int edge_buf_put(struct edge_buf *eb, const char *buf,
2949         unsigned int count)
2950 {
2951         unsigned int len;
2952
2953
2954         if (eb == NULL)
2955                 return 0;
2956
2957         len  = edge_buf_space_avail(eb);
2958         if (count > len)
2959                 count = len;
2960
2961         if (count == 0)
2962                 return 0;
2963
2964         len = eb->buf_buf + eb->buf_size - eb->buf_put;
2965         if (count > len) {
2966                 memcpy(eb->buf_put, buf, len);
2967                 memcpy(eb->buf_buf, buf+len, count - len);
2968                 eb->buf_put = eb->buf_buf + count - len;
2969         } else {
2970                 memcpy(eb->buf_put, buf, count);
2971                 if (count < len)
2972                         eb->buf_put += count;
2973                 else /* count == len */
2974                         eb->buf_put = eb->buf_buf;
2975         }
2976
2977         return count;
2978 }
2979
2980
2981 /*
2982  * edge_buf_get
2983  *
2984  * Get data from the circular buffer and copy to the given buffer.
2985  * Restrict to the amount of data available.
2986  *
2987  * Return the number of bytes copied.
2988  */
2989
2990 static unsigned int edge_buf_get(struct edge_buf *eb, char *buf,
2991         unsigned int count)
2992 {
2993         unsigned int len;
2994
2995
2996         if (eb == NULL)
2997                 return 0;
2998
2999         len = edge_buf_data_avail(eb);
3000         if (count > len)
3001                 count = len;
3002
3003         if (count == 0)
3004                 return 0;
3005
3006         len = eb->buf_buf + eb->buf_size - eb->buf_get;
3007         if (count > len) {
3008                 memcpy(buf, eb->buf_get, len);
3009                 memcpy(buf+len, eb->buf_buf, count - len);
3010                 eb->buf_get = eb->buf_buf + count - len;
3011         } else {
3012                 memcpy(buf, eb->buf_get, count);
3013                 if (count < len)
3014                         eb->buf_get += count;
3015                 else /* count == len */
3016                         eb->buf_get = eb->buf_buf;
3017         }
3018
3019         return count;
3020 }
3021
3022
3023 static struct usb_serial_driver edgeport_1port_device = {
3024         .driver = {
3025                 .owner          = THIS_MODULE,
3026                 .name           = "edgeport_ti_1",
3027         },
3028         .description            = "Edgeport TI 1 port adapter",
3029         .usb_driver             = &io_driver,
3030         .id_table               = edgeport_1port_id_table,
3031         .num_interrupt_in       = 1,
3032         .num_bulk_in            = 1,
3033         .num_bulk_out           = 1,
3034         .num_ports              = 1,
3035         .open                   = edge_open,
3036         .close                  = edge_close,
3037         .throttle               = edge_throttle,
3038         .unthrottle             = edge_unthrottle,
3039         .attach                 = edge_startup,
3040         .shutdown               = edge_shutdown,
3041         .port_probe             = edge_create_sysfs_attrs,
3042         .ioctl                  = edge_ioctl,
3043         .set_termios            = edge_set_termios,
3044         .tiocmget               = edge_tiocmget,
3045         .tiocmset               = edge_tiocmset,
3046         .write                  = edge_write,
3047         .write_room             = edge_write_room,
3048         .chars_in_buffer        = edge_chars_in_buffer,
3049         .break_ctl              = edge_break,
3050         .read_int_callback      = edge_interrupt_callback,
3051         .read_bulk_callback     = edge_bulk_in_callback,
3052         .write_bulk_callback    = edge_bulk_out_callback,
3053 };
3054
3055 static struct usb_serial_driver edgeport_2port_device = {
3056         .driver = {
3057                 .owner          = THIS_MODULE,
3058                 .name           = "edgeport_ti_2",
3059         },
3060         .description            = "Edgeport TI 2 port adapter",
3061         .usb_driver             = &io_driver,
3062         .id_table               = edgeport_2port_id_table,
3063         .num_interrupt_in       = 1,
3064         .num_bulk_in            = 2,
3065         .num_bulk_out           = 2,
3066         .num_ports              = 2,
3067         .open                   = edge_open,
3068         .close                  = edge_close,
3069         .throttle               = edge_throttle,
3070         .unthrottle             = edge_unthrottle,
3071         .attach                 = edge_startup,
3072         .shutdown               = edge_shutdown,
3073         .port_probe             = edge_create_sysfs_attrs,
3074         .ioctl                  = edge_ioctl,
3075         .set_termios            = edge_set_termios,
3076         .tiocmget               = edge_tiocmget,
3077         .tiocmset               = edge_tiocmset,
3078         .write                  = edge_write,
3079         .write_room             = edge_write_room,
3080         .chars_in_buffer        = edge_chars_in_buffer,
3081         .break_ctl              = edge_break,
3082         .read_int_callback      = edge_interrupt_callback,
3083         .read_bulk_callback     = edge_bulk_in_callback,
3084         .write_bulk_callback    = edge_bulk_out_callback,
3085 };
3086
3087
3088 static int __init edgeport_init(void)
3089 {
3090         int retval;
3091         retval = usb_serial_register(&edgeport_1port_device);
3092         if (retval)
3093                 goto failed_1port_device_register;
3094         retval = usb_serial_register(&edgeport_2port_device);
3095         if (retval)
3096                 goto failed_2port_device_register;
3097         retval = usb_register(&io_driver);
3098         if (retval)
3099                 goto failed_usb_register;
3100         info(DRIVER_DESC " " DRIVER_VERSION);
3101         return 0;
3102 failed_usb_register:
3103         usb_serial_deregister(&edgeport_2port_device);
3104 failed_2port_device_register:
3105         usb_serial_deregister(&edgeport_1port_device);
3106 failed_1port_device_register:
3107         return retval;
3108 }
3109
3110 static void __exit edgeport_exit (void)
3111 {
3112         usb_deregister (&io_driver);
3113         usb_serial_deregister (&edgeport_1port_device);
3114         usb_serial_deregister (&edgeport_2port_device);
3115 }
3116
3117 module_init(edgeport_init);
3118 module_exit(edgeport_exit);
3119
3120 /* Module information */
3121 MODULE_AUTHOR(DRIVER_AUTHOR);
3122 MODULE_DESCRIPTION(DRIVER_DESC);
3123 MODULE_LICENSE("GPL");
3124
3125 module_param(debug, bool, S_IRUGO | S_IWUSR);
3126 MODULE_PARM_DESC(debug, "Debug enabled or not");
3127
3128 module_param(low_latency, bool, S_IRUGO | S_IWUSR);
3129 MODULE_PARM_DESC(low_latency, "Low latency enabled or not");
3130
3131 module_param(closing_wait, int, S_IRUGO | S_IWUSR);
3132 MODULE_PARM_DESC(closing_wait, "Maximum wait for data to drain, in .01 secs");
3133
3134 module_param(ignore_cpu_rev, bool, S_IRUGO | S_IWUSR);
3135 MODULE_PARM_DESC(ignore_cpu_rev, "Ignore the cpu revision when connecting to a device");
3136
3137 module_param(default_uart_mode, int, S_IRUGO | S_IWUSR);
3138 MODULE_PARM_DESC(default_uart_mode, "Default uart_mode, 0=RS232, ...");
3139