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                         u32 data_len = min_t(u32, len__, TMP_BUF_MAX);  \
  80                         strscpy(tbuf, buf__, data_len);                 \
  81                         if (tbuf[data_len - 2] == '\r')                 \
  82                                 tbuf[data_len - 2] = 'r';               \
  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_UNKNOWN    = 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 reserved: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         case 4: /* 4 bytes */
 418                 *(buf) = __le32_to_cpu(readl(ptr));
 419                 goto out;
 420         }
 421
 422         while (i < size_bytes) {
 423                 if (size_bytes - i == 2) {
 424                         /* Handle 2 bytes in the end */
 425                         buf16 = (u16 *) buf;
 426                         *(buf16) = __le16_to_cpu(readw(ptr));
 427                         i += 2;
 428                 } else {
 429                         /* Read 4 bytes */
 430                         *(buf) = __le32_to_cpu(readl(ptr));
 431                         i += 4;
 432                 }
 433                 buf++;
 434                 ptr++;
 435         }
 436 out:
 437         return;
 438 }
 439
 440 /*
 441  * TODO:
 442  * -Optimize
 443  * -Rewrite cleaner
 444  */
 445 static u32 write_mem32(void __iomem *mem_addr_start, const u32 *buf,
 446                         u32 size_bytes)
 447 {
 448         u32 i = 0;
 449         u32 __iomem *ptr = mem_addr_start;
 450         const u16 *buf16;
 451
 452         if (unlikely(!ptr || !buf))
 453                 return 0;
 454
 455         /* shortcut for extremely often used cases */
 456         switch (size_bytes) {
 457         case 2: /* 2 bytes */
 458                 buf16 = (const u16 *)buf;
 459                 writew(__cpu_to_le16(*buf16), ptr);
 460                 return 2;
 461         case 1: /*
 462                  * also needs to write 4 bytes in this case
 463                  * so falling through..
 464                  */
 465                 fallthrough;
 466         case 4: /* 4 bytes */
 467                 writel(__cpu_to_le32(*buf), ptr);
 468                 return 4;
 469         }
 470
 471         while (i < size_bytes) {
 472                 if (size_bytes - i == 2) {
 473                         /* 2 bytes */
 474                         buf16 = (const u16 *)buf;
 475                         writew(__cpu_to_le16(*buf16), ptr);
 476                         i += 2;
 477                 } else {
 478                         /* 4 bytes */
 479                         writel(__cpu_to_le32(*buf), ptr);
 480                         i += 4;
 481                 }
 482                 buf++;
 483                 ptr++;
 484         }
 485         return i;
 486 }
 487
 488 /* Setup pointers to different channels and also setup buffer sizes. */
 489 static void nozomi_setup_memory(struct nozomi *dc)
 490 {
 491         void __iomem *offset = dc->base_addr + dc->config_table.dl_start;
 492         /* The length reported is including the length field of 4 bytes,
 493          * hence subtract with 4.
 494          */
 495         const u16 buff_offset = 4;
 496
 497         /* Modem port dl configuration */
 498         dc->port[PORT_MDM].dl_addr[CH_A] = offset;
 499         dc->port[PORT_MDM].dl_addr[CH_B] =
 500                                 (offset += dc->config_table.dl_mdm_len1);
 501         dc->port[PORT_MDM].dl_size[CH_A] =
 502                                 dc->config_table.dl_mdm_len1 - buff_offset;
 503         dc->port[PORT_MDM].dl_size[CH_B] =
 504                                 dc->config_table.dl_mdm_len2 - buff_offset;
 505
 506         /* Diag port dl configuration */
 507         dc->port[PORT_DIAG].dl_addr[CH_A] =
 508                                 (offset += dc->config_table.dl_mdm_len2);
 509         dc->port[PORT_DIAG].dl_size[CH_A] =
 510                                 dc->config_table.dl_diag_len1 - buff_offset;
 511         dc->port[PORT_DIAG].dl_addr[CH_B] =
 512                                 (offset += dc->config_table.dl_diag_len1);
 513         dc->port[PORT_DIAG].dl_size[CH_B] =
 514                                 dc->config_table.dl_diag_len2 - buff_offset;
 515
 516         /* App1 port dl configuration */
 517         dc->port[PORT_APP1].dl_addr[CH_A] =
 518                                 (offset += dc->config_table.dl_diag_len2);
 519         dc->port[PORT_APP1].dl_size[CH_A] =
 520                                 dc->config_table.dl_app1_len - buff_offset;
 521
 522         /* App2 port dl configuration */
 523         dc->port[PORT_APP2].dl_addr[CH_A] =
 524                                 (offset += dc->config_table.dl_app1_len);
 525         dc->port[PORT_APP2].dl_size[CH_A] =
 526                                 dc->config_table.dl_app2_len - buff_offset;
 527
 528         /* Ctrl dl configuration */
 529         dc->port[PORT_CTRL].dl_addr[CH_A] =
 530                                 (offset += dc->config_table.dl_app2_len);
 531         dc->port[PORT_CTRL].dl_size[CH_A] =
 532                                 dc->config_table.dl_ctrl_len - buff_offset;
 533
 534         offset = dc->base_addr + dc->config_table.ul_start;
 535
 536         /* Modem Port ul configuration */
 537         dc->port[PORT_MDM].ul_addr[CH_A] = offset;
 538         dc->port[PORT_MDM].ul_size[CH_A] =
 539                                 dc->config_table.ul_mdm_len1 - buff_offset;
 540         dc->port[PORT_MDM].ul_addr[CH_B] =
 541                                 (offset += dc->config_table.ul_mdm_len1);
 542         dc->port[PORT_MDM].ul_size[CH_B] =
 543                                 dc->config_table.ul_mdm_len2 - buff_offset;
 544
 545         /* Diag port ul configuration */
 546         dc->port[PORT_DIAG].ul_addr[CH_A] =
 547                                 (offset += dc->config_table.ul_mdm_len2);
 548         dc->port[PORT_DIAG].ul_size[CH_A] =
 549                                 dc->config_table.ul_diag_len - buff_offset;
 550
 551         /* App1 port ul configuration */
 552         dc->port[PORT_APP1].ul_addr[CH_A] =
 553                                 (offset += dc->config_table.ul_diag_len);
 554         dc->port[PORT_APP1].ul_size[CH_A] =
 555                                 dc->config_table.ul_app1_len - buff_offset;
 556
 557         /* App2 port ul configuration */
 558         dc->port[PORT_APP2].ul_addr[CH_A] =
 559                                 (offset += dc->config_table.ul_app1_len);
 560         dc->port[PORT_APP2].ul_size[CH_A] =
 561                                 dc->config_table.ul_app2_len - buff_offset;
 562
 563         /* Ctrl ul configuration */
 564         dc->port[PORT_CTRL].ul_addr[CH_A] =
 565                                 (offset += dc->config_table.ul_app2_len);
 566         dc->port[PORT_CTRL].ul_size[CH_A] =
 567                                 dc->config_table.ul_ctrl_len - buff_offset;
 568 }
 569
 570 /* Dump config table under initalization phase */
 571 #ifdef DEBUG
 572 static void dump_table(const struct nozomi *dc)
 573 {
 574         DBG3("signature: 0x%08X", dc->config_table.signature);
 575         DBG3("version: 0x%04X", dc->config_table.version);
 576         DBG3("product_information: 0x%04X", \
 577                                 dc->config_table.product_information);
 578         DBG3("toggle enabled: %d", dc->config_table.toggle.enabled);
 579         DBG3("toggle up_mdm: %d", dc->config_table.toggle.mdm_ul);
 580         DBG3("toggle dl_mdm: %d", dc->config_table.toggle.mdm_dl);
 581         DBG3("toggle dl_dbg: %d", dc->config_table.toggle.diag_dl);
 582
 583         DBG3("dl_start: 0x%04X", dc->config_table.dl_start);
 584         DBG3("dl_mdm_len0: 0x%04X, %d", dc->config_table.dl_mdm_len1,
 585            dc->config_table.dl_mdm_len1);
 586         DBG3("dl_mdm_len1: 0x%04X, %d", dc->config_table.dl_mdm_len2,
 587            dc->config_table.dl_mdm_len2);
 588         DBG3("dl_diag_len0: 0x%04X, %d", dc->config_table.dl_diag_len1,
 589            dc->config_table.dl_diag_len1);
 590         DBG3("dl_diag_len1: 0x%04X, %d", dc->config_table.dl_diag_len2,
 591            dc->config_table.dl_diag_len2);
 592         DBG3("dl_app1_len: 0x%04X, %d", dc->config_table.dl_app1_len,
 593            dc->config_table.dl_app1_len);
 594         DBG3("dl_app2_len: 0x%04X, %d", dc->config_table.dl_app2_len,
 595            dc->config_table.dl_app2_len);
 596         DBG3("dl_ctrl_len: 0x%04X, %d", dc->config_table.dl_ctrl_len,
 597            dc->config_table.dl_ctrl_len);
 598         DBG3("ul_start: 0x%04X, %d", dc->config_table.ul_start,
 599            dc->config_table.ul_start);
 600         DBG3("ul_mdm_len[0]: 0x%04X, %d", dc->config_table.ul_mdm_len1,
 601            dc->config_table.ul_mdm_len1);
 602         DBG3("ul_mdm_len[1]: 0x%04X, %d", dc->config_table.ul_mdm_len2,
 603            dc->config_table.ul_mdm_len2);
 604         DBG3("ul_diag_len: 0x%04X, %d", dc->config_table.ul_diag_len,
 605            dc->config_table.ul_diag_len);
 606         DBG3("ul_app1_len: 0x%04X, %d", dc->config_table.ul_app1_len,
 607            dc->config_table.ul_app1_len);
 608         DBG3("ul_app2_len: 0x%04X, %d", dc->config_table.ul_app2_len,
 609            dc->config_table.ul_app2_len);
 610         DBG3("ul_ctrl_len: 0x%04X, %d", dc->config_table.ul_ctrl_len,
 611            dc->config_table.ul_ctrl_len);
 612 }
 613 #else
 614 static inline void dump_table(const struct nozomi *dc) { }
 615 #endif
 616
 617 /*
 618  * Read configuration table from card under intalization phase
 619  * Returns 1 if ok, else 0
 620  */
 621 static int nozomi_read_config_table(struct nozomi *dc)
 622 {
 623         read_mem32((u32 *) &dc->config_table, dc->base_addr + 0,
 624                                                 sizeof(struct config_table));
 625
 626         if (dc->config_table.signature != NOZOMI_CONFIG_MAGIC) {
 627                 dev_err(&dc->pdev->dev, "ConfigTable Bad! 0x%08X != 0x%08X\n",
 628                         dc->config_table.signature, NOZOMI_CONFIG_MAGIC);
 629                 return 0;
 630         }
 631
 632         if ((dc->config_table.version == 0)
 633             || (dc->config_table.toggle.enabled == TOGGLE_VALID)) {
 634                 int i;
 635                 DBG1("Second phase, configuring card");
 636
 637                 nozomi_setup_memory(dc);
 638
 639                 dc->port[PORT_MDM].toggle_ul = dc->config_table.toggle.mdm_ul;
 640                 dc->port[PORT_MDM].toggle_dl = dc->config_table.toggle.mdm_dl;
 641                 dc->port[PORT_DIAG].toggle_dl = dc->config_table.toggle.diag_dl;
 642                 DBG1("toggle ports: MDM UL:%d MDM DL:%d, DIAG DL:%d",
 643                    dc->port[PORT_MDM].toggle_ul,
 644                    dc->port[PORT_MDM].toggle_dl, dc->port[PORT_DIAG].toggle_dl);
 645
 646                 dump_table(dc);
 647
 648                 for (i = PORT_MDM; i < MAX_PORT; i++) {
 649                         memset(&dc->port[i].ctrl_dl, 0, sizeof(struct ctrl_dl));
 650                         memset(&dc->port[i].ctrl_ul, 0, sizeof(struct ctrl_ul));
 651                 }
 652
 653                 /* Enable control channel */
 654                 dc->last_ier = dc->last_ier | CTRL_DL;
 655                 writew(dc->last_ier, dc->reg_ier);
 656
 657                 dc->state = NOZOMI_STATE_ALLOCATED;
 658                 dev_info(&dc->pdev->dev, "Initialization OK!\n");
 659                 return 1;
 660         }
 661
 662         if ((dc->config_table.version > 0)
 663             && (dc->config_table.toggle.enabled != TOGGLE_VALID)) {
 664                 u32 offset = 0;
 665                 DBG1("First phase: pushing upload buffers, clearing download");
 666
 667                 dev_info(&dc->pdev->dev, "Version of card: %d\n",
 668                          dc->config_table.version);
 669
 670                 /* Here we should disable all I/O over F32. */
 671                 nozomi_setup_memory(dc);
 672
 673                 /*
 674                  * We should send ALL channel pair tokens back along
 675                  * with reset token
 676                  */
 677
 678                 /* push upload modem buffers */
 679                 write_mem32(dc->port[PORT_MDM].ul_addr[CH_A],
 680                         (u32 *) &offset, 4);
 681                 write_mem32(dc->port[PORT_MDM].ul_addr[CH_B],
 682                         (u32 *) &offset, 4);
 683
 684                 writew(MDM_UL | DIAG_DL | MDM_DL, dc->reg_fcr);
 685
 686                 DBG1("First phase done");
 687         }
 688
 689         return 1;
 690 }
 691
 692 /* Enable uplink interrupts  */
 693 static void enable_transmit_ul(enum port_type port, struct nozomi *dc)
 694 {
 695         static const u16 mask[] = {MDM_UL, DIAG_UL, APP1_UL, APP2_UL, CTRL_UL};
 696
 697         if (port < NOZOMI_MAX_PORTS) {
 698                 dc->last_ier |= mask[port];
 699                 writew(dc->last_ier, dc->reg_ier);
 700         } else {
 701                 dev_err(&dc->pdev->dev, "Called with wrong port?\n");
 702         }
 703 }
 704
 705 /* Disable uplink interrupts  */
 706 static void disable_transmit_ul(enum port_type port, struct nozomi *dc)
 707 {
 708         static const u16 mask[] =
 709                 {~MDM_UL, ~DIAG_UL, ~APP1_UL, ~APP2_UL, ~CTRL_UL};
 710
 711         if (port < NOZOMI_MAX_PORTS) {
 712                 dc->last_ier &= mask[port];
 713                 writew(dc->last_ier, dc->reg_ier);
 714         } else {
 715                 dev_err(&dc->pdev->dev, "Called with wrong port?\n");
 716         }
 717 }
 718
 719 /* Enable downlink interrupts */
 720 static void enable_transmit_dl(enum port_type port, struct nozomi *dc)
 721 {
 722         static const u16 mask[] = {MDM_DL, DIAG_DL, APP1_DL, APP2_DL, CTRL_DL};
 723
 724         if (port < NOZOMI_MAX_PORTS) {
 725                 dc->last_ier |= mask[port];
 726                 writew(dc->last_ier, dc->reg_ier);
 727         } else {
 728                 dev_err(&dc->pdev->dev, "Called with wrong port?\n");
 729         }
 730 }
 731
 732 /* Disable downlink interrupts */
 733 static void disable_transmit_dl(enum port_type port, struct nozomi *dc)
 734 {
 735         static const u16 mask[] =
 736                 {~MDM_DL, ~DIAG_DL, ~APP1_DL, ~APP2_DL, ~CTRL_DL};
 737
 738         if (port < NOZOMI_MAX_PORTS) {
 739                 dc->last_ier &= mask[port];
 740                 writew(dc->last_ier, dc->reg_ier);
 741         } else {
 742                 dev_err(&dc->pdev->dev, "Called with wrong port?\n");
 743         }
 744 }
 745
 746 /*
 747  * Return 1 - send buffer to card and ack.
 748  * Return 0 - don't ack, don't send buffer to card.
 749  */
 750 static int send_data(enum port_type index, struct nozomi *dc)
 751 {
 752         u32 size = 0;
 753         struct port *port = &dc->port[index];
 754         const u8 toggle = port->toggle_ul;
 755         void __iomem *addr = port->ul_addr[toggle];
 756         const u32 ul_size = port->ul_size[toggle];
 757
 758         /* Get data from tty and place in buf for now */
 759         size = kfifo_out(&port->fifo_ul, dc->send_buf,
 760                            ul_size < SEND_BUF_MAX ? ul_size : SEND_BUF_MAX);
 761
 762         if (size == 0) {
 763                 DBG4("No more data to send, disable link:");
 764                 return 0;
 765         }
 766
 767         /* DUMP(buf, size); */
 768
 769         /* Write length + data */
 770         write_mem32(addr, (u32 *) &size, 4);
 771         write_mem32(addr + 4, (u32 *) dc->send_buf, size);
 772
 773         tty_port_tty_wakeup(&port->port);
 774
 775         return 1;
 776 }
 777
 778 /* If all data has been read, return 1, else 0 */
 779 static int receive_data(enum port_type index, struct nozomi *dc)
 780 {
 781         u8 buf[RECEIVE_BUF_MAX] = { 0 };
 782         int size;
 783         u32 offset = 4;
 784         struct port *port = &dc->port[index];
 785         void __iomem *addr = port->dl_addr[port->toggle_dl];
 786         struct tty_struct *tty = tty_port_tty_get(&port->port);
 787         int i, ret;
 788
 789         size = __le32_to_cpu(readl(addr));
 790         /*  DBG1( "%d bytes port: %d", size, index); */
 791
 792         if (tty && tty_throttled(tty)) {
 793                 DBG1("No room in tty, don't read data, don't ack interrupt, "
 794                         "disable interrupt");
 795
 796                 /* disable interrupt in downlink... */
 797                 disable_transmit_dl(index, dc);
 798                 ret = 0;
 799                 goto put;
 800         }
 801
 802         if (unlikely(size == 0)) {
 803                 dev_err(&dc->pdev->dev, "size == 0?\n");
 804                 ret = 1;
 805                 goto put;
 806         }
 807
 808         while (size > 0) {
 809                 read_mem32((u32 *) buf, addr + offset, RECEIVE_BUF_MAX);
 810
 811                 if (size == 1) {
 812                         tty_insert_flip_char(&port->port, buf[0], TTY_NORMAL);
 813                         size = 0;
 814                 } else if (size < RECEIVE_BUF_MAX) {
 815                         size -= tty_insert_flip_string(&port->port,
 816                                         (char *)buf, size);
 817                 } else {
 818                         i = tty_insert_flip_string(&port->port,
 819                                         (char *)buf, RECEIVE_BUF_MAX);
 820                         size -= i;
 821                         offset += i;
 822                 }
 823         }
 824
 825         set_bit(index, &dc->flip);
 826         ret = 1;
 827 put:
 828         tty_kref_put(tty);
 829         return ret;
 830 }
 831
 832 /* Debug for interrupts */
 833 #ifdef DEBUG
 834 static char *interrupt2str(u16 interrupt)
 835 {
 836         static char buf[TMP_BUF_MAX];
 837         char *p = buf;
 838
 839         if (interrupt & MDM_DL1)
 840                 p += scnprintf(p, TMP_BUF_MAX, "MDM_DL1 ");
 841         if (interrupt & MDM_DL2)
 842                 p += scnprintf(p, TMP_BUF_MAX - (p - buf), "MDM_DL2 ");
 843         if (interrupt & MDM_UL1)
 844                 p += scnprintf(p, TMP_BUF_MAX - (p - buf), "MDM_UL1 ");
 845         if (interrupt & MDM_UL2)
 846                 p += scnprintf(p, TMP_BUF_MAX - (p - buf), "MDM_UL2 ");
 847         if (interrupt & DIAG_DL1)
 848                 p += scnprintf(p, TMP_BUF_MAX - (p - buf), "DIAG_DL1 ");
 849         if (interrupt & DIAG_DL2)
 850                 p += scnprintf(p, TMP_BUF_MAX - (p - buf), "DIAG_DL2 ");
 851
 852         if (interrupt & DIAG_UL)
 853                 p += scnprintf(p, TMP_BUF_MAX - (p - buf), "DIAG_UL ");
 854
 855         if (interrupt & APP1_DL)
 856                 p += scnprintf(p, TMP_BUF_MAX - (p - buf), "APP1_DL ");
 857         if (interrupt & APP2_DL)
 858                 p += scnprintf(p, TMP_BUF_MAX - (p - buf), "APP2_DL ");
 859
 860         if (interrupt & APP1_UL)
 861                 p += scnprintf(p, TMP_BUF_MAX - (p - buf), "APP1_UL ");
 862         if (interrupt & APP2_UL)
 863                 p += scnprintf(p, TMP_BUF_MAX - (p - buf), "APP2_UL ");
 864
 865         if (interrupt & CTRL_DL)
 866                 p += scnprintf(p, TMP_BUF_MAX - (p - buf), "CTRL_DL ");
 867         if (interrupt & CTRL_UL)
 868                 p += scnprintf(p, TMP_BUF_MAX - (p - buf), "CTRL_UL ");
 869
 870         if (interrupt & RESET)
 871                 p += scnprintf(p, TMP_BUF_MAX - (p - buf), "RESET ");
 872
 873         return buf;
 874 }
 875 #endif
 876
 877 /*
 878  * Receive flow control
 879  * Return 1 - If ok, else 0
 880  */
 881 static int receive_flow_control(struct nozomi *dc)
 882 {
 883         enum port_type port = PORT_MDM;
 884         struct ctrl_dl ctrl_dl;
 885         struct ctrl_dl old_ctrl;
 886         u16 enable_ier = 0;
 887
 888         read_mem32((u32 *) &ctrl_dl, dc->port[PORT_CTRL].dl_addr[CH_A], 2);
 889
 890         switch (ctrl_dl.port) {
 891         case CTRL_CMD:
 892                 DBG1("The Base Band sends this value as a response to a "
 893                         "request for IMSI detach sent over the control "
 894                         "channel uplink (see section 7.6.1).");
 895                 break;
 896         case CTRL_MDM:
 897                 port = PORT_MDM;
 898                 enable_ier = MDM_DL;
 899                 break;
 900         case CTRL_DIAG:
 901                 port = PORT_DIAG;
 902                 enable_ier = DIAG_DL;
 903                 break;
 904         case CTRL_APP1:
 905                 port = PORT_APP1;
 906                 enable_ier = APP1_DL;
 907                 break;
 908         case CTRL_APP2:
 909                 port = PORT_APP2;
 910                 enable_ier = APP2_DL;
 911                 if (dc->state == NOZOMI_STATE_ALLOCATED) {
 912                         /*
 913                          * After card initialization the flow control
 914                          * received for APP2 is always the last
 915                          */
 916                         dc->state = NOZOMI_STATE_READY;
 917                         dev_info(&dc->pdev->dev, "Device READY!\n");
 918                 }
 919                 break;
 920         default:
 921                 dev_err(&dc->pdev->dev,
 922                         "ERROR: flow control received for non-existing port\n");
 923                 return 0;
 924         }
 925
 926         DBG1("0x%04X->0x%04X", *((u16 *)&dc->port[port].ctrl_dl),
 927            *((u16 *)&ctrl_dl));
 928
 929         old_ctrl = dc->port[port].ctrl_dl;
 930         dc->port[port].ctrl_dl = ctrl_dl;
 931
 932         if (old_ctrl.CTS == 1 && ctrl_dl.CTS == 0) {
 933                 DBG1("Disable interrupt (0x%04X) on port: %d",
 934                         enable_ier, port);
 935                 disable_transmit_ul(port, dc);
 936
 937         } else if (old_ctrl.CTS == 0 && ctrl_dl.CTS == 1) {
 938
 939                 if (kfifo_len(&dc->port[port].fifo_ul)) {
 940                         DBG1("Enable interrupt (0x%04X) on port: %d",
 941                                 enable_ier, port);
 942                         DBG1("Data in buffer [%d], enable transmit! ",
 943                                 kfifo_len(&dc->port[port].fifo_ul));
 944                         enable_transmit_ul(port, dc);
 945                 } else {
 946                         DBG1("No data in buffer...");
 947                 }
 948         }
 949
 950         if (*(u16 *)&old_ctrl == *(u16 *)&ctrl_dl) {
 951                 DBG1(" No change in mctrl");
 952                 return 1;
 953         }
 954         /* Update statistics */
 955         if (old_ctrl.CTS != ctrl_dl.CTS)
 956                 dc->port[port].tty_icount.cts++;
 957         if (old_ctrl.DSR != ctrl_dl.DSR)
 958                 dc->port[port].tty_icount.dsr++;
 959         if (old_ctrl.RI != ctrl_dl.RI)
 960                 dc->port[port].tty_icount.rng++;
 961         if (old_ctrl.DCD != ctrl_dl.DCD)
 962                 dc->port[port].tty_icount.dcd++;
 963
 964         wake_up_interruptible(&dc->port[port].tty_wait);
 965
 966         DBG1("port: %d DCD(%d), CTS(%d), RI(%d), DSR(%d)",
 967            port,
 968            dc->port[port].tty_icount.dcd, dc->port[port].tty_icount.cts,
 969            dc->port[port].tty_icount.rng, dc->port[port].tty_icount.dsr);
 970
 971         return 1;
 972 }
 973
 974 static enum ctrl_port_type port2ctrl(enum port_type port,
 975                                         const struct nozomi *dc)
 976 {
 977         switch (port) {
 978         case PORT_MDM:
 979                 return CTRL_MDM;
 980         case PORT_DIAG:
 981                 return CTRL_DIAG;
 982         case PORT_APP1:
 983                 return CTRL_APP1;
 984         case PORT_APP2:
 985                 return CTRL_APP2;
 986         default:
 987                 dev_err(&dc->pdev->dev,
 988                         "ERROR: send flow control " \
 989                         "received for non-existing port\n");
 990         }
 991         return CTRL_ERROR;
 992 }
 993
 994 /*
 995  * Send flow control, can only update one channel at a time
 996  * Return 0 - If we have updated all flow control
 997  * Return 1 - If we need to update more flow control, ack current enable more
 998  */
 999 static int send_flow_control(struct nozomi *dc)
1000 {
1001         u32 i, more_flow_control_to_be_updated = 0;
1002         u16 *ctrl;
1003
1004         for (i = PORT_MDM; i < MAX_PORT; i++) {
1005                 if (dc->port[i].update_flow_control) {
1006                         if (more_flow_control_to_be_updated) {
1007                                 /* We have more flow control to be updated */
1008                                 return 1;
1009                         }
1010                         dc->port[i].ctrl_ul.port = port2ctrl(i, dc);
1011                         ctrl = (u16 *)&dc->port[i].ctrl_ul;
1012                         write_mem32(dc->port[PORT_CTRL].ul_addr[0], \
1013                                 (u32 *) ctrl, 2);
1014                         dc->port[i].update_flow_control = 0;
1015                         more_flow_control_to_be_updated = 1;
1016                 }
1017         }
1018         return 0;
1019 }
1020
1021 /*
1022  * Handle downlink data, ports that are handled are modem and diagnostics
1023  * Return 1 - ok
1024  * Return 0 - toggle fields are out of sync
1025  */
1026 static int handle_data_dl(struct nozomi *dc, enum port_type port, u8 *toggle,
1027                         u16 read_iir, u16 mask1, u16 mask2)
1028 {
1029         if (*toggle == 0 && read_iir & mask1) {
1030                 if (receive_data(port, dc)) {
1031                         writew(mask1, dc->reg_fcr);
1032                         *toggle = !(*toggle);
1033                 }
1034
1035                 if (read_iir & mask2) {
1036                         if (receive_data(port, dc)) {
1037                                 writew(mask2, dc->reg_fcr);
1038                                 *toggle = !(*toggle);
1039                         }
1040                 }
1041         } else if (*toggle == 1 && read_iir & mask2) {
1042                 if (receive_data(port, dc)) {
1043                         writew(mask2, dc->reg_fcr);
1044                         *toggle = !(*toggle);
1045                 }
1046
1047                 if (read_iir & mask1) {
1048                         if (receive_data(port, dc)) {
1049                                 writew(mask1, dc->reg_fcr);
1050                                 *toggle = !(*toggle);
1051                         }
1052                 }
1053         } else {
1054                 dev_err(&dc->pdev->dev, "port out of sync!, toggle:%d\n",
1055                         *toggle);
1056                 return 0;
1057         }
1058         return 1;
1059 }
1060
1061 /*
1062  * Handle uplink data, this is currently for the modem port
1063  * Return 1 - ok
1064  * Return 0 - toggle field are out of sync
1065  */
1066 static int handle_data_ul(struct nozomi *dc, enum port_type port, u16 read_iir)
1067 {
1068         u8 *toggle = &(dc->port[port].toggle_ul);
1069
1070         if (*toggle == 0 && read_iir & MDM_UL1) {
1071                 dc->last_ier &= ~MDM_UL;
1072                 writew(dc->last_ier, dc->reg_ier);
1073                 if (send_data(port, dc)) {
1074                         writew(MDM_UL1, dc->reg_fcr);
1075                         dc->last_ier = dc->last_ier | MDM_UL;
1076                         writew(dc->last_ier, dc->reg_ier);
1077                         *toggle = !*toggle;
1078                 }
1079
1080                 if (read_iir & MDM_UL2) {
1081                         dc->last_ier &= ~MDM_UL;
1082                         writew(dc->last_ier, dc->reg_ier);
1083                         if (send_data(port, dc)) {
1084                                 writew(MDM_UL2, dc->reg_fcr);
1085                                 dc->last_ier = dc->last_ier | MDM_UL;
1086                                 writew(dc->last_ier, dc->reg_ier);
1087                                 *toggle = !*toggle;
1088                         }
1089                 }
1090
1091         } else if (*toggle == 1 && read_iir & MDM_UL2) {
1092                 dc->last_ier &= ~MDM_UL;
1093                 writew(dc->last_ier, dc->reg_ier);
1094                 if (send_data(port, dc)) {
1095                         writew(MDM_UL2, dc->reg_fcr);
1096                         dc->last_ier = dc->last_ier | MDM_UL;
1097                         writew(dc->last_ier, dc->reg_ier);
1098                         *toggle = !*toggle;
1099                 }
1100
1101                 if (read_iir & MDM_UL1) {
1102                         dc->last_ier &= ~MDM_UL;
1103                         writew(dc->last_ier, dc->reg_ier);
1104                         if (send_data(port, dc)) {
1105                                 writew(MDM_UL1, dc->reg_fcr);
1106                                 dc->last_ier = dc->last_ier | MDM_UL;
1107                                 writew(dc->last_ier, dc->reg_ier);
1108                                 *toggle = !*toggle;
1109                         }
1110                 }
1111         } else {
1112                 writew(read_iir & MDM_UL, dc->reg_fcr);
1113                 dev_err(&dc->pdev->dev, "port out of sync!\n");
1114                 return 0;
1115         }
1116         return 1;
1117 }
1118
1119 static irqreturn_t interrupt_handler(int irq, void *dev_id)
1120 {
1121         struct nozomi *dc = dev_id;
1122         unsigned int a;
1123         u16 read_iir;
1124
1125         if (!dc)
1126                 return IRQ_NONE;
1127
1128         spin_lock(&dc->spin_mutex);
1129         read_iir = readw(dc->reg_iir);
1130
1131         /* Card removed */
1132         if (read_iir == (u16)-1)
1133                 goto none;
1134         /*
1135          * Just handle interrupt enabled in IER
1136          * (by masking with dc->last_ier)
1137          */
1138         read_iir &= dc->last_ier;
1139
1140         if (read_iir == 0)
1141                 goto none;
1142
1143
1144         DBG4("%s irq:0x%04X, prev:0x%04X", interrupt2str(read_iir), read_iir,
1145                 dc->last_ier);
1146
1147         if (read_iir & RESET) {
1148                 if (unlikely(!nozomi_read_config_table(dc))) {
1149                         dc->last_ier = 0x0;
1150                         writew(dc->last_ier, dc->reg_ier);
1151                         dev_err(&dc->pdev->dev, "Could not read status from "
1152                                 "card, we should disable interface\n");
1153                 } else {
1154                         writew(RESET, dc->reg_fcr);
1155                 }
1156                 /* No more useful info if this was the reset interrupt. */
1157                 goto exit_handler;
1158         }
1159         if (read_iir & CTRL_UL) {
1160                 DBG1("CTRL_UL");
1161                 dc->last_ier &= ~CTRL_UL;
1162                 writew(dc->last_ier, dc->reg_ier);
1163                 if (send_flow_control(dc)) {
1164                         writew(CTRL_UL, dc->reg_fcr);
1165                         dc->last_ier = dc->last_ier | CTRL_UL;
1166                         writew(dc->last_ier, dc->reg_ier);
1167                 }
1168         }
1169         if (read_iir & CTRL_DL) {
1170                 receive_flow_control(dc);
1171                 writew(CTRL_DL, dc->reg_fcr);
1172         }
1173         if (read_iir & MDM_DL) {
1174                 if (!handle_data_dl(dc, PORT_MDM,
1175                                 &(dc->port[PORT_MDM].toggle_dl), read_iir,
1176                                 MDM_DL1, MDM_DL2)) {
1177                         dev_err(&dc->pdev->dev, "MDM_DL out of sync!\n");
1178                         goto exit_handler;
1179                 }
1180         }
1181         if (read_iir & MDM_UL) {
1182                 if (!handle_data_ul(dc, PORT_MDM, read_iir)) {
1183                         dev_err(&dc->pdev->dev, "MDM_UL out of sync!\n");
1184                         goto exit_handler;
1185                 }
1186         }
1187         if (read_iir & DIAG_DL) {
1188                 if (!handle_data_dl(dc, PORT_DIAG,
1189                                 &(dc->port[PORT_DIAG].toggle_dl), read_iir,
1190                                 DIAG_DL1, DIAG_DL2)) {
1191                         dev_err(&dc->pdev->dev, "DIAG_DL out of sync!\n");
1192                         goto exit_handler;
1193                 }
1194         }
1195         if (read_iir & DIAG_UL) {
1196                 dc->last_ier &= ~DIAG_UL;
1197                 writew(dc->last_ier, dc->reg_ier);
1198                 if (send_data(PORT_DIAG, dc)) {
1199                         writew(DIAG_UL, dc->reg_fcr);
1200                         dc->last_ier = dc->last_ier | DIAG_UL;
1201                         writew(dc->last_ier, dc->reg_ier);
1202                 }
1203         }
1204         if (read_iir & APP1_DL) {
1205                 if (receive_data(PORT_APP1, dc))
1206                         writew(APP1_DL, dc->reg_fcr);
1207         }
1208         if (read_iir & APP1_UL) {
1209                 dc->last_ier &= ~APP1_UL;
1210                 writew(dc->last_ier, dc->reg_ier);
1211                 if (send_data(PORT_APP1, dc)) {
1212                         writew(APP1_UL, dc->reg_fcr);
1213                         dc->last_ier = dc->last_ier | APP1_UL;
1214                         writew(dc->last_ier, dc->reg_ier);
1215                 }
1216         }
1217         if (read_iir & APP2_DL) {
1218                 if (receive_data(PORT_APP2, dc))
1219                         writew(APP2_DL, dc->reg_fcr);
1220         }
1221         if (read_iir & APP2_UL) {
1222                 dc->last_ier &= ~APP2_UL;
1223                 writew(dc->last_ier, dc->reg_ier);
1224                 if (send_data(PORT_APP2, dc)) {
1225                         writew(APP2_UL, dc->reg_fcr);
1226                         dc->last_ier = dc->last_ier | APP2_UL;
1227                         writew(dc->last_ier, dc->reg_ier);
1228                 }
1229         }
1230
1231 exit_handler:
1232         spin_unlock(&dc->spin_mutex);
1233
1234         for (a = 0; a < NOZOMI_MAX_PORTS; a++)
1235                 if (test_and_clear_bit(a, &dc->flip))
1236                         tty_flip_buffer_push(&dc->port[a].port);
1237
1238         return IRQ_HANDLED;
1239 none:
1240         spin_unlock(&dc->spin_mutex);
1241         return IRQ_NONE;
1242 }
1243
1244 static void nozomi_get_card_type(struct nozomi *dc)
1245 {
1246         int i;
1247         u32 size = 0;
1248
1249         for (i = 0; i < 6; i++)
1250                 size += pci_resource_len(dc->pdev, i);
1251
1252         /* Assume card type F32_8 if no match */
1253         dc->card_type = size == 2048 ? F32_2 : F32_8;
1254
1255         dev_info(&dc->pdev->dev, "Card type is: %d\n", dc->card_type);
1256 }
1257
1258 static void nozomi_setup_private_data(struct nozomi *dc)
1259 {
1260         void __iomem *offset = dc->base_addr + dc->card_type / 2;
1261         unsigned int i;
1262
1263         dc->reg_fcr = (void __iomem *)(offset + R_FCR);
1264         dc->reg_iir = (void __iomem *)(offset + R_IIR);
1265         dc->reg_ier = (void __iomem *)(offset + R_IER);
1266         dc->last_ier = 0;
1267         dc->flip = 0;
1268
1269         dc->port[PORT_MDM].token_dl = MDM_DL;
1270         dc->port[PORT_DIAG].token_dl = DIAG_DL;
1271         dc->port[PORT_APP1].token_dl = APP1_DL;
1272         dc->port[PORT_APP2].token_dl = APP2_DL;
1273
1274         for (i = 0; i < MAX_PORT; i++)
1275                 init_waitqueue_head(&dc->port[i].tty_wait);
1276 }
1277
1278 static ssize_t card_type_show(struct device *dev, struct device_attribute *attr,
1279                           char *buf)
1280 {
1281         const struct nozomi *dc = dev_get_drvdata(dev);
1282
1283         return sprintf(buf, "%d\n", dc->card_type);
1284 }
1285 static DEVICE_ATTR_RO(card_type);
1286
1287 static ssize_t open_ttys_show(struct device *dev, struct device_attribute *attr,
1288                           char *buf)
1289 {
1290         const struct nozomi *dc = dev_get_drvdata(dev);
1291
1292         return sprintf(buf, "%u\n", dc->open_ttys);
1293 }
1294 static DEVICE_ATTR_RO(open_ttys);
1295
1296 static void make_sysfs_files(struct nozomi *dc)
1297 {
1298         if (device_create_file(&dc->pdev->dev, &dev_attr_card_type))
1299                 dev_err(&dc->pdev->dev,
1300                         "Could not create sysfs file for card_type\n");
1301         if (device_create_file(&dc->pdev->dev, &dev_attr_open_ttys))
1302                 dev_err(&dc->pdev->dev,
1303                         "Could not create sysfs file for open_ttys\n");
1304 }
1305
1306 static void remove_sysfs_files(struct nozomi *dc)
1307 {
1308         device_remove_file(&dc->pdev->dev, &dev_attr_card_type);
1309         device_remove_file(&dc->pdev->dev, &dev_attr_open_ttys);
1310 }
1311
1312 /* Allocate memory for one device */
1313 static int nozomi_card_init(struct pci_dev *pdev,
1314                                       const struct pci_device_id *ent)
1315 {
1316         int ret;
1317         struct nozomi *dc = NULL;
1318         int ndev_idx;
1319         int i;
1320
1321         dev_dbg(&pdev->dev, "Init, new card found\n");
1322
1323         for (ndev_idx = 0; ndev_idx < ARRAY_SIZE(ndevs); ndev_idx++)
1324                 if (!ndevs[ndev_idx])
1325                         break;
1326
1327         if (ndev_idx >= ARRAY_SIZE(ndevs)) {
1328                 dev_err(&pdev->dev, "no free tty range for this card left\n");
1329                 ret = -EIO;
1330                 goto err;
1331         }
1332
1333         dc = kzalloc(sizeof(struct nozomi), GFP_KERNEL);
1334         if (unlikely(!dc)) {
1335                 dev_err(&pdev->dev, "Could not allocate memory\n");
1336                 ret = -ENOMEM;
1337                 goto err_free;
1338         }
1339
1340         dc->pdev = pdev;
1341
1342         ret = pci_enable_device(dc->pdev);
1343         if (ret) {
1344                 dev_err(&pdev->dev, "Failed to enable PCI Device\n");
1345                 goto err_free;
1346         }
1347
1348         ret = pci_request_regions(dc->pdev, NOZOMI_NAME);
1349         if (ret) {
1350                 dev_err(&pdev->dev, "I/O address 0x%04x already in use\n",
1351                         (int) /* nozomi_private.io_addr */ 0);
1352                 goto err_disable_device;
1353         }
1354
1355         /* Find out what card type it is */
1356         nozomi_get_card_type(dc);
1357
1358         dc->base_addr = pci_iomap(dc->pdev, 0, dc->card_type);
1359         if (!dc->base_addr) {
1360                 dev_err(&pdev->dev, "Unable to map card MMIO\n");
1361                 ret = -ENODEV;
1362                 goto err_rel_regs;
1363         }
1364
1365         dc->send_buf = kmalloc(SEND_BUF_MAX, GFP_KERNEL);
1366         if (!dc->send_buf) {
1367                 dev_err(&pdev->dev, "Could not allocate send buffer?\n");
1368                 ret = -ENOMEM;
1369                 goto err_free_sbuf;
1370         }
1371
1372         for (i = PORT_MDM; i < MAX_PORT; i++) {
1373                 if (kfifo_alloc(&dc->port[i].fifo_ul, FIFO_BUFFER_SIZE_UL,
1374                                         GFP_KERNEL)) {
1375                         dev_err(&pdev->dev,
1376                                         "Could not allocate kfifo buffer\n");
1377                         ret = -ENOMEM;
1378                         goto err_free_kfifo;
1379                 }
1380         }
1381
1382         spin_lock_init(&dc->spin_mutex);
1383
1384         nozomi_setup_private_data(dc);
1385
1386         /* Disable all interrupts */
1387         dc->last_ier = 0;
1388         writew(dc->last_ier, dc->reg_ier);
1389
1390         ret = request_irq(pdev->irq, &interrupt_handler, IRQF_SHARED,
1391                         NOZOMI_NAME, dc);
1392         if (unlikely(ret)) {
1393                 dev_err(&pdev->dev, "can't request irq %d\n", pdev->irq);
1394                 goto err_free_kfifo;
1395         }
1396
1397         DBG1("base_addr: %p", dc->base_addr);
1398
1399         make_sysfs_files(dc);
1400
1401         dc->index_start = ndev_idx * MAX_PORT;
1402         ndevs[ndev_idx] = dc;
1403
1404         pci_set_drvdata(pdev, dc);
1405
1406         /* Enable RESET interrupt */
1407         dc->last_ier = RESET;
1408         iowrite16(dc->last_ier, dc->reg_ier);
1409
1410         dc->state = NOZOMI_STATE_ENABLED;
1411
1412         for (i = 0; i < MAX_PORT; i++) {
1413                 struct device *tty_dev;
1414                 struct port *port = &dc->port[i];
1415                 port->dc = dc;
1416                 tty_port_init(&port->port);
1417                 port->port.ops = &noz_tty_port_ops;
1418                 tty_dev = tty_port_register_device(&port->port, ntty_driver,
1419                                 dc->index_start + i, &pdev->dev);
1420
1421                 if (IS_ERR(tty_dev)) {
1422                         ret = PTR_ERR(tty_dev);
1423                         dev_err(&pdev->dev, "Could not allocate tty?\n");
1424                         tty_port_destroy(&port->port);
1425                         goto err_free_tty;
1426                 }
1427         }
1428
1429         return 0;
1430
1431 err_free_tty:
1432         for (i = 0; i < MAX_PORT; ++i) {
1433                 tty_unregister_device(ntty_driver, dc->index_start + i);
1434                 tty_port_destroy(&dc->port[i].port);
1435         }
1436 err_free_kfifo:
1437         for (i = 0; i < MAX_PORT; i++)
1438                 kfifo_free(&dc->port[i].fifo_ul);
1439 err_free_sbuf:
1440         kfree(dc->send_buf);
1441         iounmap(dc->base_addr);
1442 err_rel_regs:
1443         pci_release_regions(pdev);
1444 err_disable_device:
1445         pci_disable_device(pdev);
1446 err_free:
1447         kfree(dc);
1448 err:
1449         return ret;
1450 }
1451
1452 static void tty_exit(struct nozomi *dc)
1453 {
1454         unsigned int i;
1455
1456         DBG1(" ");
1457
1458         for (i = 0; i < MAX_PORT; ++i)
1459                 tty_port_tty_hangup(&dc->port[i].port, false);
1460
1461         /* Racy below - surely should wait for scheduled work to be done or
1462            complete off a hangup method ? */
1463         while (dc->open_ttys)
1464                 msleep(1);
1465         for (i = 0; i < MAX_PORT; ++i) {
1466                 tty_unregister_device(ntty_driver, dc->index_start + i);
1467                 tty_port_destroy(&dc->port[i].port);
1468         }
1469 }
1470
1471 /* Deallocate memory for one device */
1472 static void nozomi_card_exit(struct pci_dev *pdev)
1473 {
1474         int i;
1475         struct ctrl_ul ctrl;
1476         struct nozomi *dc = pci_get_drvdata(pdev);
1477
1478         /* Disable all interrupts */
1479         dc->last_ier = 0;
1480         writew(dc->last_ier, dc->reg_ier);
1481
1482         tty_exit(dc);
1483
1484         /* Send 0x0001, command card to resend the reset token.  */
1485         /* This is to get the reset when the module is reloaded. */
1486         ctrl.port = 0x00;
1487         ctrl.reserved = 0;
1488         ctrl.RTS = 0;
1489         ctrl.DTR = 1;
1490         DBG1("sending flow control 0x%04X", *((u16 *)&ctrl));
1491
1492         /* Setup dc->reg addresses to we can use defines here */
1493         write_mem32(dc->port[PORT_CTRL].ul_addr[0], (u32 *)&ctrl, 2);
1494         writew(CTRL_UL, dc->reg_fcr);   /* push the token to the card. */
1495
1496         remove_sysfs_files(dc);
1497
1498         free_irq(pdev->irq, dc);
1499
1500         for (i = 0; i < MAX_PORT; i++)
1501                 kfifo_free(&dc->port[i].fifo_ul);
1502
1503         kfree(dc->send_buf);
1504
1505         iounmap(dc->base_addr);
1506
1507         pci_release_regions(pdev);
1508
1509         pci_disable_device(pdev);
1510
1511         ndevs[dc->index_start / MAX_PORT] = NULL;
1512
1513         kfree(dc);
1514 }
1515
1516 static void set_rts(const struct tty_struct *tty, int rts)
1517 {
1518         struct port *port = get_port_by_tty(tty);
1519
1520         port->ctrl_ul.RTS = rts;
1521         port->update_flow_control = 1;
1522         enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty));
1523 }
1524
1525 static void set_dtr(const struct tty_struct *tty, int dtr)
1526 {
1527         struct port *port = get_port_by_tty(tty);
1528
1529         DBG1("SETTING DTR index: %d, dtr: %d", tty->index, dtr);
1530
1531         port->ctrl_ul.DTR = dtr;
1532         port->update_flow_control = 1;
1533         enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty));
1534 }
1535
1536 /*
1537  * ----------------------------------------------------------------------------
1538  * TTY code
1539  * ----------------------------------------------------------------------------
1540  */
1541
1542 static int ntty_install(struct tty_driver *driver, struct tty_struct *tty)
1543 {
1544         struct port *port = get_port_by_tty(tty);
1545         struct nozomi *dc = get_dc_by_tty(tty);
1546         int ret;
1547         if (!port || !dc || dc->state != NOZOMI_STATE_READY)
1548                 return -ENODEV;
1549         ret = tty_standard_install(driver, tty);
1550         if (ret == 0)
1551                 tty->driver_data = port;
1552         return ret;
1553 }
1554
1555 static void ntty_cleanup(struct tty_struct *tty)
1556 {
1557         tty->driver_data = NULL;
1558 }
1559
1560 static int ntty_activate(struct tty_port *tport, struct tty_struct *tty)
1561 {
1562         struct port *port = container_of(tport, struct port, port);
1563         struct nozomi *dc = port->dc;
1564         unsigned long flags;
1565
1566         DBG1("open: %d", port->token_dl);
1567         spin_lock_irqsave(&dc->spin_mutex, flags);
1568         dc->last_ier = dc->last_ier | port->token_dl;
1569         writew(dc->last_ier, dc->reg_ier);
1570         dc->open_ttys++;
1571         spin_unlock_irqrestore(&dc->spin_mutex, flags);
1572         printk("noz: activated %d: %p\n", tty->index, tport);
1573         return 0;
1574 }
1575
1576 static int ntty_open(struct tty_struct *tty, struct file *filp)
1577 {
1578         struct port *port = tty->driver_data;
1579         return tty_port_open(&port->port, tty, filp);
1580 }
1581
1582 static void ntty_shutdown(struct tty_port *tport)
1583 {
1584         struct port *port = container_of(tport, struct port, port);
1585         struct nozomi *dc = port->dc;
1586         unsigned long flags;
1587
1588         DBG1("close: %d", port->token_dl);
1589         spin_lock_irqsave(&dc->spin_mutex, flags);
1590         dc->last_ier &= ~(port->token_dl);
1591         writew(dc->last_ier, dc->reg_ier);
1592         dc->open_ttys--;
1593         spin_unlock_irqrestore(&dc->spin_mutex, flags);
1594         printk("noz: shutdown %p\n", tport);
1595 }
1596
1597 static void ntty_close(struct tty_struct *tty, struct file *filp)
1598 {
1599         struct port *port = tty->driver_data;
1600         if (port)
1601                 tty_port_close(&port->port, tty, filp);
1602 }
1603
1604 static void ntty_hangup(struct tty_struct *tty)
1605 {
1606         struct port *port = tty->driver_data;
1607         tty_port_hangup(&port->port);
1608 }
1609
1610 /*
1611  * called when the userspace process writes to the tty (/dev/noz*).
1612  * Data is inserted into a fifo, which is then read and transferred to the modem.
1613  */
1614 static int ntty_write(struct tty_struct *tty, const unsigned char *buffer,
1615                       int count)
1616 {
1617         int rval = -EINVAL;
1618         struct nozomi *dc = get_dc_by_tty(tty);
1619         struct port *port = tty->driver_data;
1620         unsigned long flags;
1621
1622         /* DBG1( "WRITEx: %d, index = %d", count, index); */
1623
1624         if (!dc || !port)
1625                 return -ENODEV;
1626
1627         rval = kfifo_in(&port->fifo_ul, (unsigned char *)buffer, count);
1628
1629         spin_lock_irqsave(&dc->spin_mutex, flags);
1630         /* CTS is only valid on the modem channel */
1631         if (port == &(dc->port[PORT_MDM])) {
1632                 if (port->ctrl_dl.CTS) {
1633                         DBG4("Enable interrupt");
1634                         enable_transmit_ul(tty->index % MAX_PORT, dc);
1635                 } else {
1636                         dev_err(&dc->pdev->dev,
1637                                 "CTS not active on modem port?\n");
1638                 }
1639         } else {
1640                 enable_transmit_ul(tty->index % MAX_PORT, dc);
1641         }
1642         spin_unlock_irqrestore(&dc->spin_mutex, flags);
1643
1644         return rval;
1645 }
1646
1647 /*
1648  * Calculate how much is left in device
1649  * This method is called by the upper tty layer.
1650  *   #according to sources N_TTY.c it expects a value >= 0 and
1651  *    does not check for negative values.
1652  *
1653  * If the port is unplugged report lots of room and let the bits
1654  * dribble away so we don't block anything.
1655  */
1656 static int ntty_write_room(struct tty_struct *tty)
1657 {
1658         struct port *port = tty->driver_data;
1659         int room = 4096;
1660         const struct nozomi *dc = get_dc_by_tty(tty);
1661
1662         if (dc)
1663                 room = kfifo_avail(&port->fifo_ul);
1664
1665         return room;
1666 }
1667
1668 /* Gets io control parameters */
1669 static int ntty_tiocmget(struct tty_struct *tty)
1670 {
1671         const struct port *port = tty->driver_data;
1672         const struct ctrl_dl *ctrl_dl = &port->ctrl_dl;
1673         const struct ctrl_ul *ctrl_ul = &port->ctrl_ul;
1674
1675         /* Note: these could change under us but it is not clear this
1676            matters if so */
1677         return (ctrl_ul->RTS ? TIOCM_RTS : 0)
1678                 | (ctrl_ul->DTR ? TIOCM_DTR : 0)
1679                 | (ctrl_dl->DCD ? TIOCM_CAR : 0)
1680                 | (ctrl_dl->RI  ? TIOCM_RNG : 0)
1681                 | (ctrl_dl->DSR ? TIOCM_DSR : 0)
1682                 | (ctrl_dl->CTS ? TIOCM_CTS : 0);
1683 }
1684
1685 /* Sets io controls parameters */
1686 static int ntty_tiocmset(struct tty_struct *tty,
1687                                         unsigned int set, unsigned int clear)
1688 {
1689         struct nozomi *dc = get_dc_by_tty(tty);
1690         unsigned long flags;
1691
1692         spin_lock_irqsave(&dc->spin_mutex, flags);
1693         if (set & TIOCM_RTS)
1694                 set_rts(tty, 1);
1695         else if (clear & TIOCM_RTS)
1696                 set_rts(tty, 0);
1697
1698         if (set & TIOCM_DTR)
1699                 set_dtr(tty, 1);
1700         else if (clear & TIOCM_DTR)
1701                 set_dtr(tty, 0);
1702         spin_unlock_irqrestore(&dc->spin_mutex, flags);
1703
1704         return 0;
1705 }
1706
1707 static int ntty_cflags_changed(struct port *port, unsigned long flags,
1708                 struct async_icount *cprev)
1709 {
1710         const struct async_icount cnow = port->tty_icount;
1711         int ret;
1712
1713         ret = ((flags & TIOCM_RNG) && (cnow.rng != cprev->rng))
1714                 || ((flags & TIOCM_DSR) && (cnow.dsr != cprev->dsr))
1715                 || ((flags & TIOCM_CD)  && (cnow.dcd != cprev->dcd))
1716                 || ((flags & TIOCM_CTS) && (cnow.cts != cprev->cts));
1717
1718         *cprev = cnow;
1719
1720         return ret;
1721 }
1722
1723 static int ntty_tiocgicount(struct tty_struct *tty,
1724                                 struct serial_icounter_struct *icount)
1725 {
1726         struct port *port = tty->driver_data;
1727         const struct async_icount cnow = port->tty_icount;
1728
1729         icount->cts = cnow.cts;
1730         icount->dsr = cnow.dsr;
1731         icount->rng = cnow.rng;
1732         icount->dcd = cnow.dcd;
1733         icount->rx = cnow.rx;
1734         icount->tx = cnow.tx;
1735         icount->frame = cnow.frame;
1736         icount->overrun = cnow.overrun;
1737         icount->parity = cnow.parity;
1738         icount->brk = cnow.brk;
1739         icount->buf_overrun = cnow.buf_overrun;
1740         return 0;
1741 }
1742
1743 static int ntty_ioctl(struct tty_struct *tty,
1744                       unsigned int cmd, unsigned long arg)
1745 {
1746         struct port *port = tty->driver_data;
1747         int rval = -ENOIOCTLCMD;
1748
1749         DBG1("******** IOCTL, cmd: %d", cmd);
1750
1751         switch (cmd) {
1752         case TIOCMIWAIT: {
1753                 struct async_icount cprev = port->tty_icount;
1754
1755                 rval = wait_event_interruptible(port->tty_wait,
1756                                 ntty_cflags_changed(port, arg, &cprev));
1757                 break;
1758         }
1759         default:
1760                 DBG1("ERR: 0x%08X, %d", cmd, cmd);
1761                 break;
1762         }
1763
1764         return rval;
1765 }
1766
1767 /*
1768  * Called by the upper tty layer when tty buffers are ready
1769  * to receive data again after a call to throttle.
1770  */
1771 static void ntty_unthrottle(struct tty_struct *tty)
1772 {
1773         struct nozomi *dc = get_dc_by_tty(tty);
1774         unsigned long flags;
1775
1776         DBG1("UNTHROTTLE");
1777         spin_lock_irqsave(&dc->spin_mutex, flags);
1778         enable_transmit_dl(tty->index % MAX_PORT, dc);
1779         set_rts(tty, 1);
1780
1781         spin_unlock_irqrestore(&dc->spin_mutex, flags);
1782 }
1783
1784 /*
1785  * Called by the upper tty layer when the tty buffers are almost full.
1786  * The driver should stop send more data.
1787  */
1788 static void ntty_throttle(struct tty_struct *tty)
1789 {
1790         struct nozomi *dc = get_dc_by_tty(tty);
1791         unsigned long flags;
1792
1793         DBG1("THROTTLE");
1794         spin_lock_irqsave(&dc->spin_mutex, flags);
1795         set_rts(tty, 0);
1796         spin_unlock_irqrestore(&dc->spin_mutex, flags);
1797 }
1798
1799 /* Returns number of chars in buffer, called by tty layer */
1800 static s32 ntty_chars_in_buffer(struct tty_struct *tty)
1801 {
1802         struct port *port = tty->driver_data;
1803         struct nozomi *dc = get_dc_by_tty(tty);
1804         s32 rval = 0;
1805
1806         if (unlikely(!dc || !port)) {
1807                 goto exit_in_buffer;
1808         }
1809
1810         rval = kfifo_len(&port->fifo_ul);
1811
1812 exit_in_buffer:
1813         return rval;
1814 }
1815
1816 static const struct tty_port_operations noz_tty_port_ops = {
1817         .activate = ntty_activate,
1818         .shutdown = ntty_shutdown,
1819 };
1820
1821 static const struct tty_operations tty_ops = {
1822         .ioctl = ntty_ioctl,
1823         .open = ntty_open,
1824         .close = ntty_close,
1825         .hangup = ntty_hangup,
1826         .write = ntty_write,
1827         .write_room = ntty_write_room,
1828         .unthrottle = ntty_unthrottle,
1829         .throttle = ntty_throttle,
1830         .chars_in_buffer = ntty_chars_in_buffer,
1831         .tiocmget = ntty_tiocmget,
1832         .tiocmset = ntty_tiocmset,
1833         .get_icount = ntty_tiocgicount,
1834         .install = ntty_install,
1835         .cleanup = ntty_cleanup,
1836 };
1837
1838 /* Module initialization */
1839 static struct pci_driver nozomi_driver = {
1840         .name = NOZOMI_NAME,
1841         .id_table = nozomi_pci_tbl,
1842         .probe = nozomi_card_init,
1843         .remove = nozomi_card_exit,
1844 };
1845
1846 static __init int nozomi_init(void)
1847 {
1848         int ret;
1849
1850         printk(KERN_INFO "Initializing %s\n", VERSION_STRING);
1851
1852         ntty_driver = alloc_tty_driver(NTTY_TTY_MAXMINORS);
1853         if (!ntty_driver)
1854                 return -ENOMEM;
1855
1856         ntty_driver->driver_name = NOZOMI_NAME_TTY;
1857         ntty_driver->name = "noz";
1858         ntty_driver->major = 0;
1859         ntty_driver->type = TTY_DRIVER_TYPE_SERIAL;
1860         ntty_driver->subtype = SERIAL_TYPE_NORMAL;
1861         ntty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1862         ntty_driver->init_termios = tty_std_termios;
1863         ntty_driver->init_termios.c_cflag = B115200 | CS8 | CREAD | \
1864                                                 HUPCL | CLOCAL;
1865         ntty_driver->init_termios.c_ispeed = 115200;
1866         ntty_driver->init_termios.c_ospeed = 115200;
1867         tty_set_operations(ntty_driver, &tty_ops);
1868
1869         ret = tty_register_driver(ntty_driver);
1870         if (ret) {
1871                 printk(KERN_ERR "Nozomi: failed to register ntty driver\n");
1872                 goto free_tty;
1873         }
1874
1875         ret = pci_register_driver(&nozomi_driver);
1876         if (ret) {
1877                 printk(KERN_ERR "Nozomi: can't register pci driver\n");
1878                 goto unr_tty;
1879         }
1880
1881         return 0;
1882 unr_tty:
1883         tty_unregister_driver(ntty_driver);
1884 free_tty:
1885         put_tty_driver(ntty_driver);
1886         return ret;
1887 }
1888
1889 static __exit void nozomi_exit(void)
1890 {
1891         printk(KERN_INFO "Unloading %s\n", DRIVER_DESC);
1892         pci_unregister_driver(&nozomi_driver);
1893         tty_unregister_driver(ntty_driver);
1894         put_tty_driver(ntty_driver);
1895 }
1896
1897 module_init(nozomi_init);
1898 module_exit(nozomi_exit);
1899
1900 MODULE_LICENSE("Dual BSD/GPL");
1901 MODULE_DESCRIPTION(DRIVER_DESC);