drivers/tty/nozomi.c

   1 // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
   2 /*
   3  * nozomi.c  -- HSDPA driver Broadband Wireless Data Card - Globe Trotter
   4  *
   5  * Written by: Ulf Jakobsson,
   6  *             Jan Åkerfeldt,
   7  *             Stefan Thomasson,
   8  *
   9  * Maintained by: Paul Hardwick (p.hardwick@option.com)
  10  *
  11  * Patches:
  12  *          Locking code changes for Vodafone by Sphere Systems Ltd,
  13  *                              Andrew Bird (ajb@spheresystems.co.uk )
  14  *                              & Phil Sanderson
  15  *
  16  * Source has been ported from an implementation made by Filip Aben @ Option
  17  *
  18  * --------------------------------------------------------------------------
  19  *
  20  * Copyright (c) 2005,2006 Option Wireless Sweden AB
  21  * Copyright (c) 2006 Sphere Systems Ltd
  22  * Copyright (c) 2006 Option Wireless n/v
  23  * All rights Reserved.
  24  *
  25  * --------------------------------------------------------------------------
  26  */
  27
  28 /* Enable this to have a lot of debug printouts */
  29 #define DEBUG
  30
  31 #include <linux/kernel.h>
  32 #include <linux/module.h>
  33 #include <linux/pci.h>
  34 #include <linux/ioport.h>
  35 #include <linux/tty.h>
  36 #include <linux/tty_driver.h>
  37 #include <linux/tty_flip.h>
  38 #include <linux/sched.h>
  39 #include <linux/serial.h>
  40 #include <linux/interrupt.h>
  41 #include <linux/kmod.h>
  42 #include <linux/init.h>
  43 #include <linux/kfifo.h>
  44 #include <linux/uaccess.h>
  45 #include <linux/slab.h>
  46 #include <asm/byteorder.h>
  47
  48 #include <linux/delay.h>
  49
  50
  51 #define VERSION_STRING DRIVER_DESC " 2.1d"
  52
  53 /* Default debug printout level */
  54 #define NOZOMI_DEBUG_LEVEL 0x00
  55 static int debug = NOZOMI_DEBUG_LEVEL;
  56 module_param(debug, int, S_IRUGO | S_IWUSR);
  57
  58 /*    Macros definitions */
  59 #define DBG_(lvl, fmt, args...)                         \
  60 do {                                                    \
  61         if (lvl & debug)                                \
  62                 pr_debug("[%d] %s(): " fmt "\n",        \
  63                          __LINE__, __func__,  ##args);  \
  64 } while (0)
  65
  66 #define DBG1(args...) DBG_(0x01, ##args)
  67 #define DBG2(args...) DBG_(0x02, ##args)
  68 #define DBG3(args...) DBG_(0x04, ##args)
  69 #define DBG4(args...) DBG_(0x08, ##args)
  70
  71 /* TODO: rewrite to optimize macros... */
  72
  73 #define TMP_BUF_MAX 256
  74
  75 #define DUMP(buf__,len__) \
  76   do {  \
  77     char tbuf[TMP_BUF_MAX] = {0};\
  78     if (len__ > 1) {\
  79         snprintf(tbuf, len__ > TMP_BUF_MAX ? TMP_BUF_MAX : len__, "%s", buf__);\
  80         if (tbuf[len__-2] == '\r') {\
  81                 tbuf[len__-2] = 'r';\
  82         } \
  83         DBG1("SENDING: '%s' (%d+n)", tbuf, len__);\
  84     } else {\
  85         DBG1("SENDING: '%s' (%d)", tbuf, len__);\
  86     } \
  87 } while (0)
  88
  89 /*    Defines */
  90 #define NOZOMI_NAME             "nozomi"
  91 #define NOZOMI_NAME_TTY         "nozomi_tty"
  92 #define DRIVER_DESC             "Nozomi driver"
  93
  94 #define NTTY_TTY_MAXMINORS      256
  95 #define NTTY_FIFO_BUFFER_SIZE   8192
  96
  97 /* Must be power of 2 */
  98 #define FIFO_BUFFER_SIZE_UL     8192
  99
 100 /* Size of tmp send buffer to card */
 101 #define SEND_BUF_MAX            1024
 102 #define RECEIVE_BUF_MAX         4
 103
 104
 105 #define R_IIR           0x0000  /* Interrupt Identity Register */
 106 #define R_FCR           0x0000  /* Flow Control Register */
 107 #define R_IER           0x0004  /* Interrupt Enable Register */
 108
 109 #define NOZOMI_CONFIG_MAGIC     0xEFEFFEFE
 110 #define TOGGLE_VALID            0x0000
 111
 112 /* Definition of interrupt tokens */
 113 #define MDM_DL1         0x0001
 114 #define MDM_UL1         0x0002
 115 #define MDM_DL2         0x0004
 116 #define MDM_UL2         0x0008
 117 #define DIAG_DL1        0x0010
 118 #define DIAG_DL2        0x0020
 119 #define DIAG_UL         0x0040
 120 #define APP1_DL         0x0080
 121 #define APP1_UL         0x0100
 122 #define APP2_DL         0x0200
 123 #define APP2_UL         0x0400
 124 #define CTRL_DL         0x0800
 125 #define CTRL_UL         0x1000
 126 #define RESET           0x8000
 127
 128 #define MDM_DL          (MDM_DL1  | MDM_DL2)
 129 #define MDM_UL          (MDM_UL1  | MDM_UL2)
 130 #define DIAG_DL         (DIAG_DL1 | DIAG_DL2)
 131
 132 /* modem signal definition */
 133 #define CTRL_DSR        0x0001
 134 #define CTRL_DCD        0x0002
 135 #define CTRL_RI         0x0004
 136 #define CTRL_CTS        0x0008
 137
 138 #define CTRL_DTR        0x0001
 139 #define CTRL_RTS        0x0002
 140
 141 #define MAX_PORT                4
 142 #define NOZOMI_MAX_PORTS        5
 143 #define NOZOMI_MAX_CARDS        (NTTY_TTY_MAXMINORS / MAX_PORT)
 144
 145 /*    Type definitions */
 146
 147 /*
 148  * There are two types of nozomi cards,
 149  * one with 2048 memory and with 8192 memory
 150  */
 151 enum card_type {
 152         F32_2 = 2048,   /* 512 bytes downlink + uplink * 2 -> 2048 */
 153         F32_8 = 8192,   /* 3072 bytes downl. + 1024 bytes uplink * 2 -> 8192 */
 154 };
 155
 156 /* Initialization states a card can be in */
 157 enum card_state {
 158         NOZOMI_STATE_UKNOWN     = 0,
 159         NOZOMI_STATE_ENABLED    = 1,    /* pci device enabled */
 160         NOZOMI_STATE_ALLOCATED  = 2,    /* config setup done */
 161         NOZOMI_STATE_READY      = 3,    /* flowcontrols received */
 162 };
 163
 164 /* Two different toggle channels exist */
 165 enum channel_type {
 166         CH_A = 0,
 167         CH_B = 1,
 168 };
 169
 170 /* Port definition for the card regarding flow control */
 171 enum ctrl_port_type {
 172         CTRL_CMD        = 0,
 173         CTRL_MDM        = 1,
 174         CTRL_DIAG       = 2,
 175         CTRL_APP1       = 3,
 176         CTRL_APP2       = 4,
 177         CTRL_ERROR      = -1,
 178 };
 179
 180 /* Ports that the nozomi has */
 181 enum port_type {
 182         PORT_MDM        = 0,
 183         PORT_DIAG       = 1,
 184         PORT_APP1       = 2,
 185         PORT_APP2       = 3,
 186         PORT_CTRL       = 4,
 187         PORT_ERROR      = -1,
 188 };
 189
 190 #ifdef __BIG_ENDIAN
 191 /* Big endian */
 192
 193 struct toggles {
 194         unsigned int enabled:5; /*
 195                                  * Toggle fields are valid if enabled is 0,
 196                                  * else A-channels must always be used.
 197                                  */
 198         unsigned int diag_dl:1;
 199         unsigned int mdm_dl:1;
 200         unsigned int mdm_ul:1;
 201 } __attribute__ ((packed));
 202
 203 /* Configuration table to read at startup of card */
 204 /* Is for now only needed during initialization phase */
 205 struct config_table {
 206         u32 signature;
 207         u16 product_information;
 208         u16 version;
 209         u8 pad3[3];
 210         struct toggles toggle;
 211         u8 pad1[4];
 212         u16 dl_mdm_len1;        /*
 213                                  * If this is 64, it can hold
 214                                  * 60 bytes + 4 that is length field
 215                                  */
 216         u16 dl_start;
 217
 218         u16 dl_diag_len1;
 219         u16 dl_mdm_len2;        /*
 220                                  * If this is 64, it can hold
 221                                  * 60 bytes + 4 that is length field
 222                                  */
 223         u16 dl_app1_len;
 224
 225         u16 dl_diag_len2;
 226         u16 dl_ctrl_len;
 227         u16 dl_app2_len;
 228         u8 pad2[16];
 229         u16 ul_mdm_len1;
 230         u16 ul_start;
 231         u16 ul_diag_len;
 232         u16 ul_mdm_len2;
 233         u16 ul_app1_len;
 234         u16 ul_app2_len;
 235         u16 ul_ctrl_len;
 236 } __attribute__ ((packed));
 237
 238 /* This stores all control downlink flags */
 239 struct ctrl_dl {
 240         u8 port;
 241         unsigned int reserved:4;
 242         unsigned int CTS:1;
 243         unsigned int RI:1;
 244         unsigned int DCD:1;
 245         unsigned int DSR:1;
 246 } __attribute__ ((packed));
 247
 248 /* This stores all control uplink flags */
 249 struct ctrl_ul {
 250         u8 port;
 251         unsigned int reserved:6;
 252         unsigned int RTS:1;
 253         unsigned int DTR:1;
 254 } __attribute__ ((packed));
 255
 256 #else
 257 /* Little endian */
 258
 259 /* This represents the toggle information */
 260 struct toggles {
 261         unsigned int mdm_ul:1;
 262         unsigned int mdm_dl:1;
 263         unsigned int diag_dl:1;
 264         unsigned int enabled:5; /*
 265                                  * Toggle fields are valid if enabled is 0,
 266                                  * else A-channels must always be used.
 267                                  */
 268 } __attribute__ ((packed));
 269
 270 /* Configuration table to read at startup of card */
 271 struct config_table {
 272         u32 signature;
 273         u16 version;
 274         u16 product_information;
 275         struct toggles toggle;
 276         u8 pad1[7];
 277         u16 dl_start;
 278         u16 dl_mdm_len1;        /*
 279                                  * If this is 64, it can hold
 280                                  * 60 bytes + 4 that is length field
 281                                  */
 282         u16 dl_mdm_len2;
 283         u16 dl_diag_len1;
 284         u16 dl_diag_len2;
 285         u16 dl_app1_len;
 286         u16 dl_app2_len;
 287         u16 dl_ctrl_len;
 288         u8 pad2[16];
 289         u16 ul_start;
 290         u16 ul_mdm_len2;
 291         u16 ul_mdm_len1;
 292         u16 ul_diag_len;
 293         u16 ul_app1_len;
 294         u16 ul_app2_len;
 295         u16 ul_ctrl_len;
 296 } __attribute__ ((packed));
 297
 298 /* This stores all control downlink flags */
 299 struct ctrl_dl {
 300         unsigned int DSR:1;
 301         unsigned int DCD:1;
 302         unsigned int RI:1;
 303         unsigned int CTS:1;
 304         unsigned int reserverd:4;
 305         u8 port;
 306 } __attribute__ ((packed));
 307
 308 /* This stores all control uplink flags */
 309 struct ctrl_ul {
 310         unsigned int DTR:1;
 311         unsigned int RTS:1;
 312         unsigned int reserved:6;
 313         u8 port;
 314 } __attribute__ ((packed));
 315 #endif
 316
 317 /* This holds all information that is needed regarding a port */
 318 struct port {
 319         struct tty_port port;
 320         u8 update_flow_control;
 321         struct ctrl_ul ctrl_ul;
 322         struct ctrl_dl ctrl_dl;
 323         struct kfifo fifo_ul;
 324         void __iomem *dl_addr[2];
 325         u32 dl_size[2];
 326         u8 toggle_dl;
 327         void __iomem *ul_addr[2];
 328         u32 ul_size[2];
 329         u8 toggle_ul;
 330         u16 token_dl;
 331
 332         wait_queue_head_t tty_wait;
 333         struct async_icount tty_icount;
 334
 335         struct nozomi *dc;
 336 };
 337
 338 /* Private data one for each card in the system */
 339 struct nozomi {
 340         void __iomem *base_addr;
 341         unsigned long flip;
 342
 343         /* Pointers to registers */
 344         void __iomem *reg_iir;
 345         void __iomem *reg_fcr;
 346         void __iomem *reg_ier;
 347
 348         u16 last_ier;
 349         enum card_type card_type;
 350         struct config_table config_table;       /* Configuration table */
 351         struct pci_dev *pdev;
 352         struct port port[NOZOMI_MAX_PORTS];
 353         u8 *send_buf;
 354
 355         spinlock_t spin_mutex;  /* secures access to registers and tty */
 356
 357         unsigned int index_start;
 358         enum card_state state;
 359         u32 open_ttys;
 360 };
 361
 362 /* This is a data packet that is read or written to/from card */
 363 struct buffer {
 364         u32 size;               /* size is the length of the data buffer */
 365         u8 *data;
 366 } __attribute__ ((packed));
 367
 368 /*    Global variables */
 369 static const struct pci_device_id nozomi_pci_tbl[] = {
 370         {PCI_DEVICE(0x1931, 0x000c)},   /* Nozomi HSDPA */
 371         {},
 372 };
 373
 374 MODULE_DEVICE_TABLE(pci, nozomi_pci_tbl);
 375
 376 static struct nozomi *ndevs[NOZOMI_MAX_CARDS];
 377 static struct tty_driver *ntty_driver;
 378
 379 static const struct tty_port_operations noz_tty_port_ops;
 380
 381 /*
 382  * find card by tty_index
 383  */
 384 static inline struct nozomi *get_dc_by_tty(const struct tty_struct *tty)
 385 {
 386         return tty ? ndevs[tty->index / MAX_PORT] : NULL;
 387 }
 388
 389 static inline struct port *get_port_by_tty(const struct tty_struct *tty)
 390 {
 391         struct nozomi *ndev = get_dc_by_tty(tty);
 392         return ndev ? &ndev->port[tty->index % MAX_PORT] : NULL;
 393 }
 394
 395 /*
 396  * TODO:
 397  * -Optimize
 398  * -Rewrite cleaner
 399  */
 400
 401 static void read_mem32(u32 *buf, const void __iomem *mem_addr_start,
 402                         u32 size_bytes)
 403 {
 404         u32 i = 0;
 405         const u32 __iomem *ptr = mem_addr_start;
 406         u16 *buf16;
 407
 408         if (unlikely(!ptr || !buf))
 409                 goto out;
 410
 411         /* shortcut for extremely often used cases */
 412         switch (size_bytes) {
 413         case 2: /* 2 bytes */
 414                 buf16 = (u16 *) buf;
 415                 *buf16 = __le16_to_cpu(readw(ptr));
 416                 goto out;
 417                 break;
 418         case 4: /* 4 bytes */
 419                 *(buf) = __le32_to_cpu(readl(ptr));
 420                 goto out;
 421                 break;
 422         }
 423
 424         while (i < size_bytes) {
 425                 if (size_bytes - i == 2) {
 426                         /* Handle 2 bytes in the end */
 427                         buf16 = (u16 *) buf;
 428                         *(buf16) = __le16_to_cpu(readw(ptr));
 429                         i += 2;
 430                 } else {
 431                         /* Read 4 bytes */
 432                         *(buf) = __le32_to_cpu(readl(ptr));
 433                         i += 4;
 434                 }
 435                 buf++;
 436                 ptr++;
 437         }
 438 out:
 439         return;
 440 }
 441
 442 /*
 443  * TODO:
 444  * -Optimize
 445  * -Rewrite cleaner
 446  */
 447 static u32 write_mem32(void __iomem *mem_addr_start, const u32 *buf,
 448                         u32 size_bytes)
 449 {
 450         u32 i = 0;
 451         u32 __iomem *ptr = mem_addr_start;
 452         const u16 *buf16;
 453
 454         if (unlikely(!ptr || !buf))
 455                 return 0;
 456
 457         /* shortcut for extremely often used cases */
 458         switch (size_bytes) {
 459         case 2: /* 2 bytes */
 460                 buf16 = (const u16 *)buf;
 461                 writew(__cpu_to_le16(*buf16), ptr);
 462                 return 2;
 463                 break;
 464         case 1: /*
 465                  * also needs to write 4 bytes in this case
 466                  * so falling through..
 467                  */
 468         case 4: /* 4 bytes */
 469                 writel(__cpu_to_le32(*buf), ptr);
 470                 return 4;
 471                 break;
 472         }
 473
 474         while (i < size_bytes) {
 475                 if (size_bytes - i == 2) {
 476                         /* 2 bytes */
 477                         buf16 = (const u16 *)buf;
 478                         writew(__cpu_to_le16(*buf16), ptr);
 479                         i += 2;
 480                 } else {
 481                         /* 4 bytes */
 482                         writel(__cpu_to_le32(*buf), ptr);
 483                         i += 4;
 484                 }
 485                 buf++;
 486                 ptr++;
 487         }
 488         return i;
 489 }
 490
 491 /* Setup pointers to different channels and also setup buffer sizes. */
 492 static void nozomi_setup_memory(struct nozomi *dc)
 493 {
 494         void __iomem *offset = dc->base_addr + dc->config_table.dl_start;
 495         /* The length reported is including the length field of 4 bytes,
 496          * hence subtract with 4.
 497          */
 498         const u16 buff_offset = 4;
 499
 500         /* Modem port dl configuration */
 501         dc->port[PORT_MDM].dl_addr[CH_A] = offset;
 502         dc->port[PORT_MDM].dl_addr[CH_B] =
 503                                 (offset += dc->config_table.dl_mdm_len1);
 504         dc->port[PORT_MDM].dl_size[CH_A] =
 505                                 dc->config_table.dl_mdm_len1 - buff_offset;
 506         dc->port[PORT_MDM].dl_size[CH_B] =
 507                                 dc->config_table.dl_mdm_len2 - buff_offset;
 508
 509         /* Diag port dl configuration */
 510         dc->port[PORT_DIAG].dl_addr[CH_A] =
 511                                 (offset += dc->config_table.dl_mdm_len2);
 512         dc->port[PORT_DIAG].dl_size[CH_A] =
 513                                 dc->config_table.dl_diag_len1 - buff_offset;
 514         dc->port[PORT_DIAG].dl_addr[CH_B] =
 515                                 (offset += dc->config_table.dl_diag_len1);
 516         dc->port[PORT_DIAG].dl_size[CH_B] =
 517                                 dc->config_table.dl_diag_len2 - buff_offset;
 518
 519         /* App1 port dl configuration */
 520         dc->port[PORT_APP1].dl_addr[CH_A] =
 521                                 (offset += dc->config_table.dl_diag_len2);
 522         dc->port[PORT_APP1].dl_size[CH_A] =
 523                                 dc->config_table.dl_app1_len - buff_offset;
 524
 525         /* App2 port dl configuration */
 526         dc->port[PORT_APP2].dl_addr[CH_A] =
 527                                 (offset += dc->config_table.dl_app1_len);
 528         dc->port[PORT_APP2].dl_size[CH_A] =
 529                                 dc->config_table.dl_app2_len - buff_offset;
 530
 531         /* Ctrl dl configuration */
 532         dc->port[PORT_CTRL].dl_addr[CH_A] =
 533                                 (offset += dc->config_table.dl_app2_len);
 534         dc->port[PORT_CTRL].dl_size[CH_A] =
 535                                 dc->config_table.dl_ctrl_len - buff_offset;
 536
 537         offset = dc->base_addr + dc->config_table.ul_start;
 538
 539         /* Modem Port ul configuration */
 540         dc->port[PORT_MDM].ul_addr[CH_A] = offset;
 541         dc->port[PORT_MDM].ul_size[CH_A] =
 542                                 dc->config_table.ul_mdm_len1 - buff_offset;
 543         dc->port[PORT_MDM].ul_addr[CH_B] =
 544                                 (offset += dc->config_table.ul_mdm_len1);
 545         dc->port[PORT_MDM].ul_size[CH_B] =
 546                                 dc->config_table.ul_mdm_len2 - buff_offset;
 547
 548         /* Diag port ul configuration */
 549         dc->port[PORT_DIAG].ul_addr[CH_A] =
 550                                 (offset += dc->config_table.ul_mdm_len2);
 551         dc->port[PORT_DIAG].ul_size[CH_A] =
 552                                 dc->config_table.ul_diag_len - buff_offset;
 553
 554         /* App1 port ul configuration */
 555         dc->port[PORT_APP1].ul_addr[CH_A] =
 556                                 (offset += dc->config_table.ul_diag_len);
 557         dc->port[PORT_APP1].ul_size[CH_A] =
 558                                 dc->config_table.ul_app1_len - buff_offset;
 559
 560         /* App2 port ul configuration */
 561         dc->port[PORT_APP2].ul_addr[CH_A] =
 562                                 (offset += dc->config_table.ul_app1_len);
 563         dc->port[PORT_APP2].ul_size[CH_A] =
 564                                 dc->config_table.ul_app2_len - buff_offset;
 565
 566         /* Ctrl ul configuration */
 567         dc->port[PORT_CTRL].ul_addr[CH_A] =
 568                                 (offset += dc->config_table.ul_app2_len);
 569         dc->port[PORT_CTRL].ul_size[CH_A] =
 570                                 dc->config_table.ul_ctrl_len - buff_offset;
 571 }
 572
 573 /* Dump config table under initalization phase */
 574 #ifdef DEBUG
 575 static void dump_table(const struct nozomi *dc)
 576 {
 577         DBG3("signature: 0x%08X", dc->config_table.signature);
 578         DBG3("version: 0x%04X", dc->config_table.version);
 579         DBG3("product_information: 0x%04X", \
 580                                 dc->config_table.product_information);
 581         DBG3("toggle enabled: %d", dc->config_table.toggle.enabled);
 582         DBG3("toggle up_mdm: %d", dc->config_table.toggle.mdm_ul);
 583         DBG3("toggle dl_mdm: %d", dc->config_table.toggle.mdm_dl);
 584         DBG3("toggle dl_dbg: %d", dc->config_table.toggle.diag_dl);
 585
 586         DBG3("dl_start: 0x%04X", dc->config_table.dl_start);
 587         DBG3("dl_mdm_len0: 0x%04X, %d", dc->config_table.dl_mdm_len1,
 588            dc->config_table.dl_mdm_len1);
 589         DBG3("dl_mdm_len1: 0x%04X, %d", dc->config_table.dl_mdm_len2,
 590            dc->config_table.dl_mdm_len2);
 591         DBG3("dl_diag_len0: 0x%04X, %d", dc->config_table.dl_diag_len1,
 592            dc->config_table.dl_diag_len1);
 593         DBG3("dl_diag_len1: 0x%04X, %d", dc->config_table.dl_diag_len2,
 594            dc->config_table.dl_diag_len2);
 595         DBG3("dl_app1_len: 0x%04X, %d", dc->config_table.dl_app1_len,
 596            dc->config_table.dl_app1_len);
 597         DBG3("dl_app2_len: 0x%04X, %d", dc->config_table.dl_app2_len,
 598            dc->config_table.dl_app2_len);
 599         DBG3("dl_ctrl_len: 0x%04X, %d", dc->config_table.dl_ctrl_len,
 600            dc->config_table.dl_ctrl_len);
 601         DBG3("ul_start: 0x%04X, %d", dc->config_table.ul_start,
 602            dc->config_table.ul_start);
 603         DBG3("ul_mdm_len[0]: 0x%04X, %d", dc->config_table.ul_mdm_len1,
 604            dc->config_table.ul_mdm_len1);
 605         DBG3("ul_mdm_len[1]: 0x%04X, %d", dc->config_table.ul_mdm_len2,
 606            dc->config_table.ul_mdm_len2);
 607         DBG3("ul_diag_len: 0x%04X, %d", dc->config_table.ul_diag_len,
 608            dc->config_table.ul_diag_len);
 609         DBG3("ul_app1_len: 0x%04X, %d", dc->config_table.ul_app1_len,
 610            dc->config_table.ul_app1_len);
 611         DBG3("ul_app2_len: 0x%04X, %d", dc->config_table.ul_app2_len,
 612            dc->config_table.ul_app2_len);
 613         DBG3("ul_ctrl_len: 0x%04X, %d", dc->config_table.ul_ctrl_len,
 614            dc->config_table.ul_ctrl_len);
 615 }
 616 #else
 617 static inline void dump_table(const struct nozomi *dc) { }
 618 #endif
 619
 620 /*
 621  * Read configuration table from card under intalization phase
 622  * Returns 1 if ok, else 0
 623  */
 624 static int nozomi_read_config_table(struct nozomi *dc)
 625 {
 626         read_mem32((u32 *) &dc->config_table, dc->base_addr + 0,
 627                                                 sizeof(struct config_table));
 628
 629         if (dc->config_table.signature != NOZOMI_CONFIG_MAGIC) {
 630                 dev_err(&dc->pdev->dev, "ConfigTable Bad! 0x%08X != 0x%08X\n",
 631                         dc->config_table.signature, NOZOMI_CONFIG_MAGIC);
 632                 return 0;
 633         }
 634
 635         if ((dc->config_table.version == 0)
 636             || (dc->config_table.toggle.enabled == TOGGLE_VALID)) {
 637                 int i;
 638                 DBG1("Second phase, configuring card");
 639
 640                 nozomi_setup_memory(dc);
 641
 642                 dc->port[PORT_MDM].toggle_ul = dc->config_table.toggle.mdm_ul;
 643                 dc->port[PORT_MDM].toggle_dl = dc->config_table.toggle.mdm_dl;
 644                 dc->port[PORT_DIAG].toggle_dl = dc->config_table.toggle.diag_dl;
 645                 DBG1("toggle ports: MDM UL:%d MDM DL:%d, DIAG DL:%d",
 646                    dc->port[PORT_MDM].toggle_ul,
 647                    dc->port[PORT_MDM].toggle_dl, dc->port[PORT_DIAG].toggle_dl);
 648
 649                 dump_table(dc);
 650
 651                 for (i = PORT_MDM; i < MAX_PORT; i++) {
 652                         memset(&dc->port[i].ctrl_dl, 0, sizeof(struct ctrl_dl));
 653                         memset(&dc->port[i].ctrl_ul, 0, sizeof(struct ctrl_ul));
 654                 }
 655
 656                 /* Enable control channel */
 657                 dc->last_ier = dc->last_ier | CTRL_DL;
 658                 writew(dc->last_ier, dc->reg_ier);
 659
 660                 dc->state = NOZOMI_STATE_ALLOCATED;
 661                 dev_info(&dc->pdev->dev, "Initialization OK!\n");
 662                 return 1;
 663         }
 664
 665         if ((dc->config_table.version > 0)
 666             && (dc->config_table.toggle.enabled != TOGGLE_VALID)) {
 667                 u32 offset = 0;
 668                 DBG1("First phase: pushing upload buffers, clearing download");
 669
 670                 dev_info(&dc->pdev->dev, "Version of card: %d\n",
 671                          dc->config_table.version);
 672
 673                 /* Here we should disable all I/O over F32. */
 674                 nozomi_setup_memory(dc);
 675
 676                 /*
 677                  * We should send ALL channel pair tokens back along
 678                  * with reset token
 679                  */
 680
 681                 /* push upload modem buffers */
 682                 write_mem32(dc->port[PORT_MDM].ul_addr[CH_A],
 683                         (u32 *) &offset, 4);
 684                 write_mem32(dc->port[PORT_MDM].ul_addr[CH_B],
 685                         (u32 *) &offset, 4);
 686
 687                 writew(MDM_UL | DIAG_DL | MDM_DL, dc->reg_fcr);
 688
 689                 DBG1("First phase done");
 690         }
 691
 692         return 1;
 693 }
 694
 695 /* Enable uplink interrupts  */
 696 static void enable_transmit_ul(enum port_type port, struct nozomi *dc)
 697 {
 698         static const u16 mask[] = {MDM_UL, DIAG_UL, APP1_UL, APP2_UL, CTRL_UL};
 699
 700         if (port < NOZOMI_MAX_PORTS) {
 701                 dc->last_ier |= mask[port];
 702                 writew(dc->last_ier, dc->reg_ier);
 703         } else {
 704                 dev_err(&dc->pdev->dev, "Called with wrong port?\n");
 705         }
 706 }
 707
 708 /* Disable uplink interrupts  */
 709 static void disable_transmit_ul(enum port_type port, struct nozomi *dc)
 710 {
 711         static const u16 mask[] =
 712                 {~MDM_UL, ~DIAG_UL, ~APP1_UL, ~APP2_UL, ~CTRL_UL};
 713
 714         if (port < NOZOMI_MAX_PORTS) {
 715                 dc->last_ier &= mask[port];
 716                 writew(dc->last_ier, dc->reg_ier);
 717         } else {
 718                 dev_err(&dc->pdev->dev, "Called with wrong port?\n");
 719         }
 720 }
 721
 722 /* Enable downlink interrupts */
 723 static void enable_transmit_dl(enum port_type port, struct nozomi *dc)
 724 {
 725         static const u16 mask[] = {MDM_DL, DIAG_DL, APP1_DL, APP2_DL, CTRL_DL};
 726
 727         if (port < NOZOMI_MAX_PORTS) {
 728                 dc->last_ier |= mask[port];
 729                 writew(dc->last_ier, dc->reg_ier);
 730         } else {
 731                 dev_err(&dc->pdev->dev, "Called with wrong port?\n");
 732         }
 733 }
 734
 735 /* Disable downlink interrupts */
 736 static void disable_transmit_dl(enum port_type port, struct nozomi *dc)
 737 {
 738         static const u16 mask[] =
 739                 {~MDM_DL, ~DIAG_DL, ~APP1_DL, ~APP2_DL, ~CTRL_DL};
 740
 741         if (port < NOZOMI_MAX_PORTS) {
 742                 dc->last_ier &= mask[port];
 743                 writew(dc->last_ier, dc->reg_ier);
 744         } else {
 745                 dev_err(&dc->pdev->dev, "Called with wrong port?\n");
 746         }
 747 }
 748
 749 /*
 750  * Return 1 - send buffer to card and ack.
 751  * Return 0 - don't ack, don't send buffer to card.
 752  */
 753 static int send_data(enum port_type index, struct nozomi *dc)
 754 {
 755         u32 size = 0;
 756         struct port *port = &dc->port[index];
 757         const u8 toggle = port->toggle_ul;
 758         void __iomem *addr = port->ul_addr[toggle];
 759         const u32 ul_size = port->ul_size[toggle];
 760
 761         /* Get data from tty and place in buf for now */
 762         size = kfifo_out(&port->fifo_ul, dc->send_buf,
 763                            ul_size < SEND_BUF_MAX ? ul_size : SEND_BUF_MAX);
 764
 765         if (size == 0) {
 766                 DBG4("No more data to send, disable link:");
 767                 return 0;
 768         }
 769
 770         /* DUMP(buf, size); */
 771
 772         /* Write length + data */
 773         write_mem32(addr, (u32 *) &size, 4);
 774         write_mem32(addr + 4, (u32 *) dc->send_buf, size);
 775
 776         tty_port_tty_wakeup(&port->port);
 777
 778         return 1;
 779 }
 780
 781 /* If all data has been read, return 1, else 0 */
 782 static int receive_data(enum port_type index, struct nozomi *dc)
 783 {
 784         u8 buf[RECEIVE_BUF_MAX] = { 0 };
 785         int size;
 786         u32 offset = 4;
 787         struct port *port = &dc->port[index];
 788         void __iomem *addr = port->dl_addr[port->toggle_dl];
 789         struct tty_struct *tty = tty_port_tty_get(&port->port);
 790         int i, ret;
 791
 792         size = __le32_to_cpu(readl(addr));
 793         /*  DBG1( "%d bytes port: %d", size, index); */
 794
 795         if (tty && tty_throttled(tty)) {
 796                 DBG1("No room in tty, don't read data, don't ack interrupt, "
 797                         "disable interrupt");
 798
 799                 /* disable interrupt in downlink... */
 800                 disable_transmit_dl(index, dc);
 801                 ret = 0;
 802                 goto put;
 803         }
 804
 805         if (unlikely(size == 0)) {
 806                 dev_err(&dc->pdev->dev, "size == 0?\n");
 807                 ret = 1;
 808                 goto put;
 809         }
 810
 811         while (size > 0) {
 812                 read_mem32((u32 *) buf, addr + offset, RECEIVE_BUF_MAX);
 813
 814                 if (size == 1) {
 815                         tty_insert_flip_char(&port->port, buf[0], TTY_NORMAL);
 816                         size = 0;
 817                 } else if (size < RECEIVE_BUF_MAX) {
 818                         size -= tty_insert_flip_string(&port->port,
 819                                         (char *)buf, size);
 820                 } else {
 821                         i = tty_insert_flip_string(&port->port,
 822                                         (char *)buf, RECEIVE_BUF_MAX);
 823                         size -= i;
 824                         offset += i;
 825                 }
 826         }
 827
 828         set_bit(index, &dc->flip);
 829         ret = 1;
 830 put:
 831         tty_kref_put(tty);
 832         return ret;
 833 }
 834
 835 /* Debug for interrupts */
 836 #ifdef DEBUG
 837 static char *interrupt2str(u16 interrupt)
 838 {
 839         static char buf[TMP_BUF_MAX];
 840         char *p = buf;
 841
 842         interrupt & MDM_DL1 ? p += snprintf(p, TMP_BUF_MAX, "MDM_DL1 ") : NULL;
 843         interrupt & MDM_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 844                                         "MDM_DL2 ") : NULL;
 845
 846         interrupt & MDM_UL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 847                                         "MDM_UL1 ") : NULL;
 848         interrupt & MDM_UL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 849                                         "MDM_UL2 ") : NULL;
 850
 851         interrupt & DIAG_DL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 852                                         "DIAG_DL1 ") : NULL;
 853         interrupt & DIAG_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 854                                         "DIAG_DL2 ") : NULL;
 855
 856         interrupt & DIAG_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 857                                         "DIAG_UL ") : NULL;
 858
 859         interrupt & APP1_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 860                                         "APP1_DL ") : NULL;
 861         interrupt & APP2_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 862                                         "APP2_DL ") : NULL;
 863
 864         interrupt & APP1_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 865                                         "APP1_UL ") : NULL;
 866         interrupt & APP2_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 867                                         "APP2_UL ") : NULL;
 868
 869         interrupt & CTRL_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 870                                         "CTRL_DL ") : NULL;
 871         interrupt & CTRL_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 872                                         "CTRL_UL ") : NULL;
 873
 874         interrupt & RESET ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 875                                         "RESET ") : NULL;
 876
 877         return buf;
 878 }
 879 #endif
 880
 881 /*
 882  * Receive flow control
 883  * Return 1 - If ok, else 0
 884  */
 885 static int receive_flow_control(struct nozomi *dc)
 886 {
 887         enum port_type port = PORT_MDM;
 888         struct ctrl_dl ctrl_dl;
 889         struct ctrl_dl old_ctrl;
 890         u16 enable_ier = 0;
 891
 892         read_mem32((u32 *) &ctrl_dl, dc->port[PORT_CTRL].dl_addr[CH_A], 2);
 893
 894         switch (ctrl_dl.port) {
 895         case CTRL_CMD:
 896                 DBG1("The Base Band sends this value as a response to a "
 897                         "request for IMSI detach sent over the control "
 898                         "channel uplink (see section 7.6.1).");
 899                 break;
 900         case CTRL_MDM:
 901                 port = PORT_MDM;
 902                 enable_ier = MDM_DL;
 903                 break;
 904         case CTRL_DIAG:
 905                 port = PORT_DIAG;
 906                 enable_ier = DIAG_DL;
 907                 break;
 908         case CTRL_APP1:
 909                 port = PORT_APP1;
 910                 enable_ier = APP1_DL;
 911                 break;
 912         case CTRL_APP2:
 913                 port = PORT_APP2;
 914                 enable_ier = APP2_DL;
 915                 if (dc->state == NOZOMI_STATE_ALLOCATED) {
 916                         /*
 917                          * After card initialization the flow control
 918                          * received for APP2 is always the last
 919                          */
 920                         dc->state = NOZOMI_STATE_READY;
 921                         dev_info(&dc->pdev->dev, "Device READY!\n");
 922                 }
 923                 break;
 924         default:
 925                 dev_err(&dc->pdev->dev,
 926                         "ERROR: flow control received for non-existing port\n");
 927                 return 0;
 928         }
 929
 930         DBG1("0x%04X->0x%04X", *((u16 *)&dc->port[port].ctrl_dl),
 931            *((u16 *)&ctrl_dl));
 932
 933         old_ctrl = dc->port[port].ctrl_dl;
 934         dc->port[port].ctrl_dl = ctrl_dl;
 935
 936         if (old_ctrl.CTS == 1 && ctrl_dl.CTS == 0) {
 937                 DBG1("Disable interrupt (0x%04X) on port: %d",
 938                         enable_ier, port);
 939                 disable_transmit_ul(port, dc);
 940
 941         } else if (old_ctrl.CTS == 0 && ctrl_dl.CTS == 1) {
 942
 943                 if (kfifo_len(&dc->port[port].fifo_ul)) {
 944                         DBG1("Enable interrupt (0x%04X) on port: %d",
 945                                 enable_ier, port);
 946                         DBG1("Data in buffer [%d], enable transmit! ",
 947                                 kfifo_len(&dc->port[port].fifo_ul));
 948                         enable_transmit_ul(port, dc);
 949                 } else {
 950                         DBG1("No data in buffer...");
 951                 }
 952         }
 953
 954         if (*(u16 *)&old_ctrl == *(u16 *)&ctrl_dl) {
 955                 DBG1(" No change in mctrl");
 956                 return 1;
 957         }
 958         /* Update statistics */
 959         if (old_ctrl.CTS != ctrl_dl.CTS)
 960                 dc->port[port].tty_icount.cts++;
 961         if (old_ctrl.DSR != ctrl_dl.DSR)
 962                 dc->port[port].tty_icount.dsr++;
 963         if (old_ctrl.RI != ctrl_dl.RI)
 964                 dc->port[port].tty_icount.rng++;
 965         if (old_ctrl.DCD != ctrl_dl.DCD)
 966                 dc->port[port].tty_icount.dcd++;
 967
 968         wake_up_interruptible(&dc->port[port].tty_wait);
 969
 970         DBG1("port: %d DCD(%d), CTS(%d), RI(%d), DSR(%d)",
 971            port,
 972            dc->port[port].tty_icount.dcd, dc->port[port].tty_icount.cts,
 973            dc->port[port].tty_icount.rng, dc->port[port].tty_icount.dsr);
 974
 975         return 1;
 976 }
 977
 978 static enum ctrl_port_type port2ctrl(enum port_type port,
 979                                         const struct nozomi *dc)
 980 {
 981         switch (port) {
 982         case PORT_MDM:
 983                 return CTRL_MDM;
 984         case PORT_DIAG:
 985                 return CTRL_DIAG;
 986         case PORT_APP1:
 987                 return CTRL_APP1;
 988         case PORT_APP2:
 989                 return CTRL_APP2;
 990         default:
 991                 dev_err(&dc->pdev->dev,
 992                         "ERROR: send flow control " \
 993                         "received for non-existing port\n");
 994         }
 995         return CTRL_ERROR;
 996 }
 997
 998 /*
 999  * Send flow control, can only update one channel at a time
1000  * Return 0 - If we have updated all flow control
1001  * Return 1 - If we need to update more flow control, ack current enable more
1002  */
1003 static int send_flow_control(struct nozomi *dc)
1004 {
1005         u32 i, more_flow_control_to_be_updated = 0;
1006         u16 *ctrl;
1007
1008         for (i = PORT_MDM; i < MAX_PORT; i++) {
1009                 if (dc->port[i].update_flow_control) {
1010                         if (more_flow_control_to_be_updated) {
1011                                 /* We have more flow control to be updated */
1012                                 return 1;
1013                         }
1014                         dc->port[i].ctrl_ul.port = port2ctrl(i, dc);
1015                         ctrl = (u16 *)&dc->port[i].ctrl_ul;
1016                         write_mem32(dc->port[PORT_CTRL].ul_addr[0], \
1017                                 (u32 *) ctrl, 2);
1018                         dc->port[i].update_flow_control = 0;
1019                         more_flow_control_to_be_updated = 1;
1020                 }
1021         }
1022         return 0;
1023 }
1024
1025 /*
1026  * Handle downlink data, ports that are handled are modem and diagnostics
1027  * Return 1 - ok
1028  * Return 0 - toggle fields are out of sync
1029  */
1030 static int handle_data_dl(struct nozomi *dc, enum port_type port, u8 *toggle,
1031                         u16 read_iir, u16 mask1, u16 mask2)
1032 {
1033         if (*toggle == 0 && read_iir & mask1) {
1034                 if (receive_data(port, dc)) {
1035                         writew(mask1, dc->reg_fcr);
1036                         *toggle = !(*toggle);
1037                 }
1038
1039                 if (read_iir & mask2) {
1040                         if (receive_data(port, dc)) {
1041                                 writew(mask2, dc->reg_fcr);
1042                                 *toggle = !(*toggle);
1043                         }
1044                 }
1045         } else if (*toggle == 1 && read_iir & mask2) {
1046                 if (receive_data(port, dc)) {
1047                         writew(mask2, dc->reg_fcr);
1048                         *toggle = !(*toggle);
1049                 }
1050
1051                 if (read_iir & mask1) {
1052                         if (receive_data(port, dc)) {
1053                                 writew(mask1, dc->reg_fcr);
1054                                 *toggle = !(*toggle);
1055                         }
1056                 }
1057         } else {
1058                 dev_err(&dc->pdev->dev, "port out of sync!, toggle:%d\n",
1059                         *toggle);
1060                 return 0;
1061         }
1062         return 1;
1063 }
1064
1065 /*
1066  * Handle uplink data, this is currently for the modem port
1067  * Return 1 - ok
1068  * Return 0 - toggle field are out of sync
1069  */
1070 static int handle_data_ul(struct nozomi *dc, enum port_type port, u16 read_iir)
1071 {
1072         u8 *toggle = &(dc->port[port].toggle_ul);
1073
1074         if (*toggle == 0 && read_iir & MDM_UL1) {
1075                 dc->last_ier &= ~MDM_UL;
1076                 writew(dc->last_ier, dc->reg_ier);
1077                 if (send_data(port, dc)) {
1078                         writew(MDM_UL1, dc->reg_fcr);
1079                         dc->last_ier = dc->last_ier | MDM_UL;
1080                         writew(dc->last_ier, dc->reg_ier);
1081                         *toggle = !*toggle;
1082                 }
1083
1084                 if (read_iir & MDM_UL2) {
1085                         dc->last_ier &= ~MDM_UL;
1086                         writew(dc->last_ier, dc->reg_ier);
1087                         if (send_data(port, dc)) {
1088                                 writew(MDM_UL2, dc->reg_fcr);
1089                                 dc->last_ier = dc->last_ier | MDM_UL;
1090                                 writew(dc->last_ier, dc->reg_ier);
1091                                 *toggle = !*toggle;
1092                         }
1093                 }
1094
1095         } else if (*toggle == 1 && read_iir & MDM_UL2) {
1096                 dc->last_ier &= ~MDM_UL;
1097                 writew(dc->last_ier, dc->reg_ier);
1098                 if (send_data(port, dc)) {
1099                         writew(MDM_UL2, dc->reg_fcr);
1100                         dc->last_ier = dc->last_ier | MDM_UL;
1101                         writew(dc->last_ier, dc->reg_ier);
1102                         *toggle = !*toggle;
1103                 }
1104
1105                 if (read_iir & MDM_UL1) {
1106                         dc->last_ier &= ~MDM_UL;
1107                         writew(dc->last_ier, dc->reg_ier);
1108                         if (send_data(port, dc)) {
1109                                 writew(MDM_UL1, dc->reg_fcr);
1110                                 dc->last_ier = dc->last_ier | MDM_UL;
1111                                 writew(dc->last_ier, dc->reg_ier);
1112                                 *toggle = !*toggle;
1113                         }
1114                 }
1115         } else {
1116                 writew(read_iir & MDM_UL, dc->reg_fcr);
1117                 dev_err(&dc->pdev->dev, "port out of sync!\n");
1118                 return 0;
1119         }
1120         return 1;
1121 }
1122
1123 static irqreturn_t interrupt_handler(int irq, void *dev_id)
1124 {
1125         struct nozomi *dc = dev_id;
1126         unsigned int a;
1127         u16 read_iir;
1128
1129         if (!dc)
1130                 return IRQ_NONE;
1131
1132         spin_lock(&dc->spin_mutex);
1133         read_iir = readw(dc->reg_iir);
1134
1135         /* Card removed */
1136         if (read_iir == (u16)-1)
1137                 goto none;
1138         /*
1139          * Just handle interrupt enabled in IER
1140          * (by masking with dc->last_ier)
1141          */
1142         read_iir &= dc->last_ier;
1143
1144         if (read_iir == 0)
1145                 goto none;
1146
1147
1148         DBG4("%s irq:0x%04X, prev:0x%04X", interrupt2str(read_iir), read_iir,
1149                 dc->last_ier);
1150
1151         if (read_iir & RESET) {
1152                 if (unlikely(!nozomi_read_config_table(dc))) {
1153                         dc->last_ier = 0x0;
1154                         writew(dc->last_ier, dc->reg_ier);
1155                         dev_err(&dc->pdev->dev, "Could not read status from "
1156                                 "card, we should disable interface\n");
1157                 } else {
1158                         writew(RESET, dc->reg_fcr);
1159                 }
1160                 /* No more useful info if this was the reset interrupt. */
1161                 goto exit_handler;
1162         }
1163         if (read_iir & CTRL_UL) {
1164                 DBG1("CTRL_UL");
1165                 dc->last_ier &= ~CTRL_UL;
1166                 writew(dc->last_ier, dc->reg_ier);
1167                 if (send_flow_control(dc)) {
1168                         writew(CTRL_UL, dc->reg_fcr);
1169                         dc->last_ier = dc->last_ier | CTRL_UL;
1170                         writew(dc->last_ier, dc->reg_ier);
1171                 }
1172         }
1173         if (read_iir & CTRL_DL) {
1174                 receive_flow_control(dc);
1175                 writew(CTRL_DL, dc->reg_fcr);
1176         }
1177         if (read_iir & MDM_DL) {
1178                 if (!handle_data_dl(dc, PORT_MDM,
1179                                 &(dc->port[PORT_MDM].toggle_dl), read_iir,
1180                                 MDM_DL1, MDM_DL2)) {
1181                         dev_err(&dc->pdev->dev, "MDM_DL out of sync!\n");
1182                         goto exit_handler;
1183                 }
1184         }
1185         if (read_iir & MDM_UL) {
1186                 if (!handle_data_ul(dc, PORT_MDM, read_iir)) {
1187                         dev_err(&dc->pdev->dev, "MDM_UL out of sync!\n");
1188                         goto exit_handler;
1189                 }
1190         }
1191         if (read_iir & DIAG_DL) {
1192                 if (!handle_data_dl(dc, PORT_DIAG,
1193                                 &(dc->port[PORT_DIAG].toggle_dl), read_iir,
1194                                 DIAG_DL1, DIAG_DL2)) {
1195                         dev_err(&dc->pdev->dev, "DIAG_DL out of sync!\n");
1196                         goto exit_handler;
1197                 }
1198         }
1199         if (read_iir & DIAG_UL) {
1200                 dc->last_ier &= ~DIAG_UL;
1201                 writew(dc->last_ier, dc->reg_ier);
1202                 if (send_data(PORT_DIAG, dc)) {
1203                         writew(DIAG_UL, dc->reg_fcr);
1204                         dc->last_ier = dc->last_ier | DIAG_UL;
1205                         writew(dc->last_ier, dc->reg_ier);
1206                 }
1207         }
1208         if (read_iir & APP1_DL) {
1209                 if (receive_data(PORT_APP1, dc))
1210                         writew(APP1_DL, dc->reg_fcr);
1211         }
1212         if (read_iir & APP1_UL) {
1213                 dc->last_ier &= ~APP1_UL;
1214                 writew(dc->last_ier, dc->reg_ier);
1215                 if (send_data(PORT_APP1, dc)) {
1216                         writew(APP1_UL, dc->reg_fcr);
1217                         dc->last_ier = dc->last_ier | APP1_UL;
1218                         writew(dc->last_ier, dc->reg_ier);
1219                 }
1220         }
1221         if (read_iir & APP2_DL) {
1222                 if (receive_data(PORT_APP2, dc))
1223                         writew(APP2_DL, dc->reg_fcr);
1224         }
1225         if (read_iir & APP2_UL) {
1226                 dc->last_ier &= ~APP2_UL;
1227                 writew(dc->last_ier, dc->reg_ier);
1228                 if (send_data(PORT_APP2, dc)) {
1229                         writew(APP2_UL, dc->reg_fcr);
1230                         dc->last_ier = dc->last_ier | APP2_UL;
1231                         writew(dc->last_ier, dc->reg_ier);
1232                 }
1233         }
1234
1235 exit_handler:
1236         spin_unlock(&dc->spin_mutex);
1237
1238         for (a = 0; a < NOZOMI_MAX_PORTS; a++)
1239                 if (test_and_clear_bit(a, &dc->flip))
1240                         tty_flip_buffer_push(&dc->port[a].port);
1241
1242         return IRQ_HANDLED;
1243 none:
1244         spin_unlock(&dc->spin_mutex);
1245         return IRQ_NONE;
1246 }
1247
1248 static void nozomi_get_card_type(struct nozomi *dc)
1249 {
1250         int i;
1251         u32 size = 0;
1252
1253         for (i = 0; i < 6; i++)
1254                 size += pci_resource_len(dc->pdev, i);
1255
1256         /* Assume card type F32_8 if no match */
1257         dc->card_type = size == 2048 ? F32_2 : F32_8;
1258
1259         dev_info(&dc->pdev->dev, "Card type is: %d\n", dc->card_type);
1260 }
1261
1262 static void nozomi_setup_private_data(struct nozomi *dc)
1263 {
1264         void __iomem *offset = dc->base_addr + dc->card_type / 2;
1265         unsigned int i;
1266
1267         dc->reg_fcr = (void __iomem *)(offset + R_FCR);
1268         dc->reg_iir = (void __iomem *)(offset + R_IIR);
1269         dc->reg_ier = (void __iomem *)(offset + R_IER);
1270         dc->last_ier = 0;
1271         dc->flip = 0;
1272
1273         dc->port[PORT_MDM].token_dl = MDM_DL;
1274         dc->port[PORT_DIAG].token_dl = DIAG_DL;
1275         dc->port[PORT_APP1].token_dl = APP1_DL;
1276         dc->port[PORT_APP2].token_dl = APP2_DL;
1277
1278         for (i = 0; i < MAX_PORT; i++)
1279                 init_waitqueue_head(&dc->port[i].tty_wait);
1280 }
1281
1282 static ssize_t card_type_show(struct device *dev, struct device_attribute *attr,
1283                           char *buf)
1284 {
1285         const struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev));
1286
1287         return sprintf(buf, "%d\n", dc->card_type);
1288 }
1289 static DEVICE_ATTR_RO(card_type);
1290
1291 static ssize_t open_ttys_show(struct device *dev, struct device_attribute *attr,
1292                           char *buf)
1293 {
1294         const struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev));
1295
1296         return sprintf(buf, "%u\n", dc->open_ttys);
1297 }
1298 static DEVICE_ATTR_RO(open_ttys);
1299
1300 static void make_sysfs_files(struct nozomi *dc)
1301 {
1302         if (device_create_file(&dc->pdev->dev, &dev_attr_card_type))
1303                 dev_err(&dc->pdev->dev,
1304                         "Could not create sysfs file for card_type\n");
1305         if (device_create_file(&dc->pdev->dev, &dev_attr_open_ttys))
1306                 dev_err(&dc->pdev->dev,
1307                         "Could not create sysfs file for open_ttys\n");
1308 }
1309
1310 static void remove_sysfs_files(struct nozomi *dc)
1311 {
1312         device_remove_file(&dc->pdev->dev, &dev_attr_card_type);
1313         device_remove_file(&dc->pdev->dev, &dev_attr_open_ttys);
1314 }
1315
1316 /* Allocate memory for one device */
1317 static int nozomi_card_init(struct pci_dev *pdev,
1318                                       const struct pci_device_id *ent)
1319 {
1320         resource_size_t start;
1321         int ret;
1322         struct nozomi *dc = NULL;
1323         int ndev_idx;
1324         int i;
1325
1326         dev_dbg(&pdev->dev, "Init, new card found\n");
1327
1328         for (ndev_idx = 0; ndev_idx < ARRAY_SIZE(ndevs); ndev_idx++)
1329                 if (!ndevs[ndev_idx])
1330                         break;
1331
1332         if (ndev_idx >= ARRAY_SIZE(ndevs)) {
1333                 dev_err(&pdev->dev, "no free tty range for this card left\n");
1334                 ret = -EIO;
1335                 goto err;
1336         }
1337
1338         dc = kzalloc(sizeof(struct nozomi), GFP_KERNEL);
1339         if (unlikely(!dc)) {
1340                 dev_err(&pdev->dev, "Could not allocate memory\n");
1341                 ret = -ENOMEM;
1342                 goto err_free;
1343         }
1344
1345         dc->pdev = pdev;
1346
1347         ret = pci_enable_device(dc->pdev);
1348         if (ret) {
1349                 dev_err(&pdev->dev, "Failed to enable PCI Device\n");
1350                 goto err_free;
1351         }
1352
1353         ret = pci_request_regions(dc->pdev, NOZOMI_NAME);
1354         if (ret) {
1355                 dev_err(&pdev->dev, "I/O address 0x%04x already in use\n",
1356                         (int) /* nozomi_private.io_addr */ 0);
1357                 goto err_disable_device;
1358         }
1359
1360         start = pci_resource_start(dc->pdev, 0);
1361         if (start == 0) {
1362                 dev_err(&pdev->dev, "No I/O address for card detected\n");
1363                 ret = -ENODEV;
1364                 goto err_rel_regs;
1365         }
1366
1367         /* Find out what card type it is */
1368         nozomi_get_card_type(dc);
1369
1370         dc->base_addr = ioremap_nocache(start, dc->card_type);
1371         if (!dc->base_addr) {
1372                 dev_err(&pdev->dev, "Unable to map card MMIO\n");
1373                 ret = -ENODEV;
1374                 goto err_rel_regs;
1375         }
1376
1377         dc->send_buf = kmalloc(SEND_BUF_MAX, GFP_KERNEL);
1378         if (!dc->send_buf) {
1379                 dev_err(&pdev->dev, "Could not allocate send buffer?\n");
1380                 ret = -ENOMEM;
1381                 goto err_free_sbuf;
1382         }
1383
1384         for (i = PORT_MDM; i < MAX_PORT; i++) {
1385                 if (kfifo_alloc(&dc->port[i].fifo_ul, FIFO_BUFFER_SIZE_UL,
1386                                         GFP_KERNEL)) {
1387                         dev_err(&pdev->dev,
1388                                         "Could not allocate kfifo buffer\n");
1389                         ret = -ENOMEM;
1390                         goto err_free_kfifo;
1391                 }
1392         }
1393
1394         spin_lock_init(&dc->spin_mutex);
1395
1396         nozomi_setup_private_data(dc);
1397
1398         /* Disable all interrupts */
1399         dc->last_ier = 0;
1400         writew(dc->last_ier, dc->reg_ier);
1401
1402         ret = request_irq(pdev->irq, &interrupt_handler, IRQF_SHARED,
1403                         NOZOMI_NAME, dc);
1404         if (unlikely(ret)) {
1405                 dev_err(&pdev->dev, "can't request irq %d\n", pdev->irq);
1406                 goto err_free_kfifo;
1407         }
1408
1409         DBG1("base_addr: %p", dc->base_addr);
1410
1411         make_sysfs_files(dc);
1412
1413         dc->index_start = ndev_idx * MAX_PORT;
1414         ndevs[ndev_idx] = dc;
1415
1416         pci_set_drvdata(pdev, dc);
1417
1418         /* Enable RESET interrupt */
1419         dc->last_ier = RESET;
1420         iowrite16(dc->last_ier, dc->reg_ier);
1421
1422         dc->state = NOZOMI_STATE_ENABLED;
1423
1424         for (i = 0; i < MAX_PORT; i++) {
1425                 struct device *tty_dev;
1426                 struct port *port = &dc->port[i];
1427                 port->dc = dc;
1428                 tty_port_init(&port->port);
1429                 port->port.ops = &noz_tty_port_ops;
1430                 tty_dev = tty_port_register_device(&port->port, ntty_driver,
1431                                 dc->index_start + i, &pdev->dev);
1432
1433                 if (IS_ERR(tty_dev)) {
1434                         ret = PTR_ERR(tty_dev);
1435                         dev_err(&pdev->dev, "Could not allocate tty?\n");
1436                         tty_port_destroy(&port->port);
1437                         goto err_free_tty;
1438                 }
1439         }
1440
1441         return 0;
1442
1443 err_free_tty:
1444         for (i = 0; i < MAX_PORT; ++i) {
1445                 tty_unregister_device(ntty_driver, dc->index_start + i);
1446                 tty_port_destroy(&dc->port[i].port);
1447         }
1448 err_free_kfifo:
1449         for (i = 0; i < MAX_PORT; i++)
1450                 kfifo_free(&dc->port[i].fifo_ul);
1451 err_free_sbuf:
1452         kfree(dc->send_buf);
1453         iounmap(dc->base_addr);
1454 err_rel_regs:
1455         pci_release_regions(pdev);
1456 err_disable_device:
1457         pci_disable_device(pdev);
1458 err_free:
1459         kfree(dc);
1460 err:
1461         return ret;
1462 }
1463
1464 static void tty_exit(struct nozomi *dc)
1465 {
1466         unsigned int i;
1467
1468         DBG1(" ");
1469
1470         for (i = 0; i < MAX_PORT; ++i)
1471                 tty_port_tty_hangup(&dc->port[i].port, false);
1472
1473         /* Racy below - surely should wait for scheduled work to be done or
1474            complete off a hangup method ? */
1475         while (dc->open_ttys)
1476                 msleep(1);
1477         for (i = 0; i < MAX_PORT; ++i) {
1478                 tty_unregister_device(ntty_driver, dc->index_start + i);
1479                 tty_port_destroy(&dc->port[i].port);
1480         }
1481 }
1482
1483 /* Deallocate memory for one device */
1484 static void nozomi_card_exit(struct pci_dev *pdev)
1485 {
1486         int i;
1487         struct ctrl_ul ctrl;
1488         struct nozomi *dc = pci_get_drvdata(pdev);
1489
1490         /* Disable all interrupts */
1491         dc->last_ier = 0;
1492         writew(dc->last_ier, dc->reg_ier);
1493
1494         tty_exit(dc);
1495
1496         /* Send 0x0001, command card to resend the reset token.  */
1497         /* This is to get the reset when the module is reloaded. */
1498         ctrl.port = 0x00;
1499         ctrl.reserved = 0;
1500         ctrl.RTS = 0;
1501         ctrl.DTR = 1;
1502         DBG1("sending flow control 0x%04X", *((u16 *)&ctrl));
1503
1504         /* Setup dc->reg addresses to we can use defines here */
1505         write_mem32(dc->port[PORT_CTRL].ul_addr[0], (u32 *)&ctrl, 2);
1506         writew(CTRL_UL, dc->reg_fcr);   /* push the token to the card. */
1507
1508         remove_sysfs_files(dc);
1509
1510         free_irq(pdev->irq, dc);
1511
1512         for (i = 0; i < MAX_PORT; i++)
1513                 kfifo_free(&dc->port[i].fifo_ul);
1514
1515         kfree(dc->send_buf);
1516
1517         iounmap(dc->base_addr);
1518
1519         pci_release_regions(pdev);
1520
1521         pci_disable_device(pdev);
1522
1523         ndevs[dc->index_start / MAX_PORT] = NULL;
1524
1525         kfree(dc);
1526 }
1527
1528 static void set_rts(const struct tty_struct *tty, int rts)
1529 {
1530         struct port *port = get_port_by_tty(tty);
1531
1532         port->ctrl_ul.RTS = rts;
1533         port->update_flow_control = 1;
1534         enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty));
1535 }
1536
1537 static void set_dtr(const struct tty_struct *tty, int dtr)
1538 {
1539         struct port *port = get_port_by_tty(tty);
1540
1541         DBG1("SETTING DTR index: %d, dtr: %d", tty->index, dtr);
1542
1543         port->ctrl_ul.DTR = dtr;
1544         port->update_flow_control = 1;
1545         enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty));
1546 }
1547
1548 /*
1549  * ----------------------------------------------------------------------------
1550  * TTY code
1551  * ----------------------------------------------------------------------------
1552  */
1553
1554 static int ntty_install(struct tty_driver *driver, struct tty_struct *tty)
1555 {
1556         struct port *port = get_port_by_tty(tty);
1557         struct nozomi *dc = get_dc_by_tty(tty);
1558         int ret;
1559         if (!port || !dc || dc->state != NOZOMI_STATE_READY)
1560                 return -ENODEV;
1561         ret = tty_standard_install(driver, tty);
1562         if (ret == 0)
1563                 tty->driver_data = port;
1564         return ret;
1565 }
1566
1567 static void ntty_cleanup(struct tty_struct *tty)
1568 {
1569         tty->driver_data = NULL;
1570 }
1571
1572 static int ntty_activate(struct tty_port *tport, struct tty_struct *tty)
1573 {
1574         struct port *port = container_of(tport, struct port, port);
1575         struct nozomi *dc = port->dc;
1576         unsigned long flags;
1577
1578         DBG1("open: %d", port->token_dl);
1579         spin_lock_irqsave(&dc->spin_mutex, flags);
1580         dc->last_ier = dc->last_ier | port->token_dl;
1581         writew(dc->last_ier, dc->reg_ier);
1582         dc->open_ttys++;
1583         spin_unlock_irqrestore(&dc->spin_mutex, flags);
1584         printk("noz: activated %d: %p\n", tty->index, tport);
1585         return 0;
1586 }
1587
1588 static int ntty_open(struct tty_struct *tty, struct file *filp)
1589 {
1590         struct port *port = tty->driver_data;
1591         return tty_port_open(&port->port, tty, filp);
1592 }
1593
1594 static void ntty_shutdown(struct tty_port *tport)
1595 {
1596         struct port *port = container_of(tport, struct port, port);
1597         struct nozomi *dc = port->dc;
1598         unsigned long flags;
1599
1600         DBG1("close: %d", port->token_dl);
1601         spin_lock_irqsave(&dc->spin_mutex, flags);
1602         dc->last_ier &= ~(port->token_dl);
1603         writew(dc->last_ier, dc->reg_ier);
1604         dc->open_ttys--;
1605         spin_unlock_irqrestore(&dc->spin_mutex, flags);
1606         printk("noz: shutdown %p\n", tport);
1607 }
1608
1609 static void ntty_close(struct tty_struct *tty, struct file *filp)
1610 {
1611         struct port *port = tty->driver_data;
1612         if (port)
1613                 tty_port_close(&port->port, tty, filp);
1614 }
1615
1616 static void ntty_hangup(struct tty_struct *tty)
1617 {
1618         struct port *port = tty->driver_data;
1619         tty_port_hangup(&port->port);
1620 }
1621
1622 /*
1623  * called when the userspace process writes to the tty (/dev/noz*).
1624  * Data is inserted into a fifo, which is then read and transferred to the modem.
1625  */
1626 static int ntty_write(struct tty_struct *tty, const unsigned char *buffer,
1627                       int count)
1628 {
1629         int rval = -EINVAL;
1630         struct nozomi *dc = get_dc_by_tty(tty);
1631         struct port *port = tty->driver_data;
1632         unsigned long flags;
1633
1634         /* DBG1( "WRITEx: %d, index = %d", count, index); */
1635
1636         if (!dc || !port)
1637                 return -ENODEV;
1638
1639         rval = kfifo_in(&port->fifo_ul, (unsigned char *)buffer, count);
1640
1641         spin_lock_irqsave(&dc->spin_mutex, flags);
1642         /* CTS is only valid on the modem channel */
1643         if (port == &(dc->port[PORT_MDM])) {
1644                 if (port->ctrl_dl.CTS) {
1645                         DBG4("Enable interrupt");
1646                         enable_transmit_ul(tty->index % MAX_PORT, dc);
1647                 } else {
1648                         dev_err(&dc->pdev->dev,
1649                                 "CTS not active on modem port?\n");
1650                 }
1651         } else {
1652                 enable_transmit_ul(tty->index % MAX_PORT, dc);
1653         }
1654         spin_unlock_irqrestore(&dc->spin_mutex, flags);
1655
1656         return rval;
1657 }
1658
1659 /*
1660  * Calculate how much is left in device
1661  * This method is called by the upper tty layer.
1662  *   #according to sources N_TTY.c it expects a value >= 0 and
1663  *    does not check for negative values.
1664  *
1665  * If the port is unplugged report lots of room and let the bits
1666  * dribble away so we don't block anything.
1667  */
1668 static int ntty_write_room(struct tty_struct *tty)
1669 {
1670         struct port *port = tty->driver_data;
1671         int room = 4096;
1672         const struct nozomi *dc = get_dc_by_tty(tty);
1673
1674         if (dc)
1675                 room = kfifo_avail(&port->fifo_ul);
1676
1677         return room;
1678 }
1679
1680 /* Gets io control parameters */
1681 static int ntty_tiocmget(struct tty_struct *tty)
1682 {
1683         const struct port *port = tty->driver_data;
1684         const struct ctrl_dl *ctrl_dl = &port->ctrl_dl;
1685         const struct ctrl_ul *ctrl_ul = &port->ctrl_ul;
1686
1687         /* Note: these could change under us but it is not clear this
1688            matters if so */
1689         return  (ctrl_ul->RTS ? TIOCM_RTS : 0) |
1690                 (ctrl_ul->DTR ? TIOCM_DTR : 0) |
1691                 (ctrl_dl->DCD ? TIOCM_CAR : 0) |
1692                 (ctrl_dl->RI  ? TIOCM_RNG : 0) |
1693                 (ctrl_dl->DSR ? TIOCM_DSR : 0) |
1694                 (ctrl_dl->CTS ? TIOCM_CTS : 0);
1695 }
1696
1697 /* Sets io controls parameters */
1698 static int ntty_tiocmset(struct tty_struct *tty,
1699                                         unsigned int set, unsigned int clear)
1700 {
1701         struct nozomi *dc = get_dc_by_tty(tty);
1702         unsigned long flags;
1703
1704         spin_lock_irqsave(&dc->spin_mutex, flags);
1705         if (set & TIOCM_RTS)
1706                 set_rts(tty, 1);
1707         else if (clear & TIOCM_RTS)
1708                 set_rts(tty, 0);
1709
1710         if (set & TIOCM_DTR)
1711                 set_dtr(tty, 1);
1712         else if (clear & TIOCM_DTR)
1713                 set_dtr(tty, 0);
1714         spin_unlock_irqrestore(&dc->spin_mutex, flags);
1715
1716         return 0;
1717 }
1718
1719 static int ntty_cflags_changed(struct port *port, unsigned long flags,
1720                 struct async_icount *cprev)
1721 {
1722         const struct async_icount cnow = port->tty_icount;
1723         int ret;
1724
1725         ret =   ((flags & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
1726                 ((flags & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
1727                 ((flags & TIOCM_CD)  && (cnow.dcd != cprev->dcd)) ||
1728                 ((flags & TIOCM_CTS) && (cnow.cts != cprev->cts));
1729
1730         *cprev = cnow;
1731
1732         return ret;
1733 }
1734
1735 static int ntty_tiocgicount(struct tty_struct *tty,
1736                                 struct serial_icounter_struct *icount)
1737 {
1738         struct port *port = tty->driver_data;
1739         const struct async_icount cnow = port->tty_icount;
1740
1741         icount->cts = cnow.cts;
1742         icount->dsr = cnow.dsr;
1743         icount->rng = cnow.rng;
1744         icount->dcd = cnow.dcd;
1745         icount->rx = cnow.rx;
1746         icount->tx = cnow.tx;
1747         icount->frame = cnow.frame;
1748         icount->overrun = cnow.overrun;
1749         icount->parity = cnow.parity;
1750         icount->brk = cnow.brk;
1751         icount->buf_overrun = cnow.buf_overrun;
1752         return 0;
1753 }
1754
1755 static int ntty_ioctl(struct tty_struct *tty,
1756                       unsigned int cmd, unsigned long arg)
1757 {
1758         struct port *port = tty->driver_data;
1759         int rval = -ENOIOCTLCMD;
1760
1761         DBG1("******** IOCTL, cmd: %d", cmd);
1762
1763         switch (cmd) {
1764         case TIOCMIWAIT: {
1765                 struct async_icount cprev = port->tty_icount;
1766
1767                 rval = wait_event_interruptible(port->tty_wait,
1768                                 ntty_cflags_changed(port, arg, &cprev));
1769                 break;
1770         }
1771         default:
1772                 DBG1("ERR: 0x%08X, %d", cmd, cmd);
1773                 break;
1774         }
1775
1776         return rval;
1777 }
1778
1779 /*
1780  * Called by the upper tty layer when tty buffers are ready
1781  * to receive data again after a call to throttle.
1782  */
1783 static void ntty_unthrottle(struct tty_struct *tty)
1784 {
1785         struct nozomi *dc = get_dc_by_tty(tty);
1786         unsigned long flags;
1787
1788         DBG1("UNTHROTTLE");
1789         spin_lock_irqsave(&dc->spin_mutex, flags);
1790         enable_transmit_dl(tty->index % MAX_PORT, dc);
1791         set_rts(tty, 1);
1792
1793         spin_unlock_irqrestore(&dc->spin_mutex, flags);
1794 }
1795
1796 /*
1797  * Called by the upper tty layer when the tty buffers are almost full.
1798  * The driver should stop send more data.
1799  */
1800 static void ntty_throttle(struct tty_struct *tty)
1801 {
1802         struct nozomi *dc = get_dc_by_tty(tty);
1803         unsigned long flags;
1804
1805         DBG1("THROTTLE");
1806         spin_lock_irqsave(&dc->spin_mutex, flags);
1807         set_rts(tty, 0);
1808         spin_unlock_irqrestore(&dc->spin_mutex, flags);
1809 }
1810
1811 /* Returns number of chars in buffer, called by tty layer */
1812 static s32 ntty_chars_in_buffer(struct tty_struct *tty)
1813 {
1814         struct port *port = tty->driver_data;
1815         struct nozomi *dc = get_dc_by_tty(tty);
1816         s32 rval = 0;
1817
1818         if (unlikely(!dc || !port)) {
1819                 goto exit_in_buffer;
1820         }
1821
1822         rval = kfifo_len(&port->fifo_ul);
1823
1824 exit_in_buffer:
1825         return rval;
1826 }
1827
1828 static const struct tty_port_operations noz_tty_port_ops = {
1829         .activate = ntty_activate,
1830         .shutdown = ntty_shutdown,
1831 };
1832
1833 static const struct tty_operations tty_ops = {
1834         .ioctl = ntty_ioctl,
1835         .open = ntty_open,
1836         .close = ntty_close,
1837         .hangup = ntty_hangup,
1838         .write = ntty_write,
1839         .write_room = ntty_write_room,
1840         .unthrottle = ntty_unthrottle,
1841         .throttle = ntty_throttle,
1842         .chars_in_buffer = ntty_chars_in_buffer,
1843         .tiocmget = ntty_tiocmget,
1844         .tiocmset = ntty_tiocmset,
1845         .get_icount = ntty_tiocgicount,
1846         .install = ntty_install,
1847         .cleanup = ntty_cleanup,
1848 };
1849
1850 /* Module initialization */
1851 static struct pci_driver nozomi_driver = {
1852         .name = NOZOMI_NAME,
1853         .id_table = nozomi_pci_tbl,
1854         .probe = nozomi_card_init,
1855         .remove = nozomi_card_exit,
1856 };
1857
1858 static __init int nozomi_init(void)
1859 {
1860         int ret;
1861
1862         printk(KERN_INFO "Initializing %s\n", VERSION_STRING);
1863
1864         ntty_driver = alloc_tty_driver(NTTY_TTY_MAXMINORS);
1865         if (!ntty_driver)
1866                 return -ENOMEM;
1867
1868         ntty_driver->driver_name = NOZOMI_NAME_TTY;
1869         ntty_driver->name = "noz";
1870         ntty_driver->major = 0;
1871         ntty_driver->type = TTY_DRIVER_TYPE_SERIAL;
1872         ntty_driver->subtype = SERIAL_TYPE_NORMAL;
1873         ntty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1874         ntty_driver->init_termios = tty_std_termios;
1875         ntty_driver->init_termios.c_cflag = B115200 | CS8 | CREAD | \
1876                                                 HUPCL | CLOCAL;
1877         ntty_driver->init_termios.c_ispeed = 115200;
1878         ntty_driver->init_termios.c_ospeed = 115200;
1879         tty_set_operations(ntty_driver, &tty_ops);
1880
1881         ret = tty_register_driver(ntty_driver);
1882         if (ret) {
1883                 printk(KERN_ERR "Nozomi: failed to register ntty driver\n");
1884                 goto free_tty;
1885         }
1886
1887         ret = pci_register_driver(&nozomi_driver);
1888         if (ret) {
1889                 printk(KERN_ERR "Nozomi: can't register pci driver\n");
1890                 goto unr_tty;
1891         }
1892
1893         return 0;
1894 unr_tty:
1895         tty_unregister_driver(ntty_driver);
1896 free_tty:
1897         put_tty_driver(ntty_driver);
1898         return ret;
1899 }
1900
1901 static __exit void nozomi_exit(void)
1902 {
1903         printk(KERN_INFO "Unloading %s\n", DRIVER_DESC);
1904         pci_unregister_driver(&nozomi_driver);
1905         tty_unregister_driver(ntty_driver);
1906         put_tty_driver(ntty_driver);
1907 }
1908
1909 module_init(nozomi_init);
1910 module_exit(nozomi_exit);
1911
1912 MODULE_LICENSE("Dual BSD/GPL");
1913 MODULE_DESCRIPTION(DRIVER_DESC);