linux/drivers/tty/nozomi.c
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   1/*
   2 * nozomi.c  -- HSDPA driver Broadband Wireless Data Card - Globe Trotter
   3 *
   4 * Written by: Ulf Jakobsson,
   5 *             Jan Ã…kerfeldt,
   6 *             Stefan Thomasson,
   7 *
   8 * Maintained by: Paul Hardwick (p.hardwick@option.com)
   9 *
  10 * Patches:
  11 *          Locking code changes for Vodafone by Sphere Systems Ltd,
  12 *                              Andrew Bird (ajb@spheresystems.co.uk )
  13 *                              & Phil Sanderson
  14 *
  15 * Source has been ported from an implementation made by Filip Aben @ Option
  16 *
  17 * --------------------------------------------------------------------------
  18 *
  19 * Copyright (c) 2005,2006 Option Wireless Sweden AB
  20 * Copyright (c) 2006 Sphere Systems Ltd
  21 * Copyright (c) 2006 Option Wireless n/v
  22 * All rights Reserved.
  23 *
  24 * This program is free software; you can redistribute it and/or modify
  25 * it under the terms of the GNU General Public License as published by
  26 * the Free Software Foundation; either version 2 of the License, or
  27 * (at your option) any later version.
  28 *
  29 * This program is distributed in the hope that it will be useful,
  30 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  31 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  32 * GNU General Public License for more details.
  33 *
  34 * You should have received a copy of the GNU General Public License
  35 * along with this program; if not, write to the Free Software
  36 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  37 *
  38 * --------------------------------------------------------------------------
  39 */
  40
  41/* Enable this to have a lot of debug printouts */
  42#define DEBUG
  43
  44#include <linux/kernel.h>
  45#include <linux/module.h>
  46#include <linux/pci.h>
  47#include <linux/ioport.h>
  48#include <linux/tty.h>
  49#include <linux/tty_driver.h>
  50#include <linux/tty_flip.h>
  51#include <linux/sched.h>
  52#include <linux/serial.h>
  53#include <linux/interrupt.h>
  54#include <linux/kmod.h>
  55#include <linux/init.h>
  56#include <linux/kfifo.h>
  57#include <linux/uaccess.h>
  58#include <linux/slab.h>
  59#include <asm/byteorder.h>
  60
  61#include <linux/delay.h>
  62
  63
  64#define VERSION_STRING DRIVER_DESC " 2.1d"
  65
  66/*    Macros definitions */
  67
  68/* Default debug printout level */
  69#define NOZOMI_DEBUG_LEVEL 0x00
  70
  71#define P_BUF_SIZE 128
  72#define NFO(_err_flag_, args...)                                \
  73do {                                                            \
  74        char tmp[P_BUF_SIZE];                                   \
  75        snprintf(tmp, sizeof(tmp), ##args);                     \
  76        printk(_err_flag_ "[%d] %s(): %s\n", __LINE__,          \
  77                __func__, tmp);                         \
  78} while (0)
  79
  80#define DBG1(args...) D_(0x01, ##args)
  81#define DBG2(args...) D_(0x02, ##args)
  82#define DBG3(args...) D_(0x04, ##args)
  83#define DBG4(args...) D_(0x08, ##args)
  84#define DBG5(args...) D_(0x10, ##args)
  85#define DBG6(args...) D_(0x20, ##args)
  86#define DBG7(args...) D_(0x40, ##args)
  87#define DBG8(args...) D_(0x80, ##args)
  88
  89#ifdef DEBUG
  90/* Do we need this settable at runtime? */
  91static int debug = NOZOMI_DEBUG_LEVEL;
  92
  93#define D(lvl, args...)  do \
  94                        {if (lvl & debug) NFO(KERN_DEBUG, ##args); } \
  95                        while (0)
  96#define D_(lvl, args...) D(lvl, ##args)
  97
  98/* These printouts are always printed */
  99
 100#else
 101static int debug;
 102#define D_(lvl, args...)
 103#endif
 104
 105/* TODO: rewrite to optimize macros... */
 106
 107#define TMP_BUF_MAX 256
 108
 109#define DUMP(buf__,len__) \
 110  do {  \
 111    char tbuf[TMP_BUF_MAX] = {0};\
 112    if (len__ > 1) {\
 113        snprintf(tbuf, len__ > TMP_BUF_MAX ? TMP_BUF_MAX : len__, "%s", buf__);\
 114        if (tbuf[len__-2] == '\r') {\
 115                tbuf[len__-2] = 'r';\
 116        } \
 117        DBG1("SENDING: '%s' (%d+n)", tbuf, len__);\
 118    } else {\
 119        DBG1("SENDING: '%s' (%d)", tbuf, len__);\
 120    } \
 121} while (0)
 122
 123/*    Defines */
 124#define NOZOMI_NAME             "nozomi"
 125#define NOZOMI_NAME_TTY         "nozomi_tty"
 126#define DRIVER_DESC             "Nozomi driver"
 127
 128#define NTTY_TTY_MAXMINORS      256
 129#define NTTY_FIFO_BUFFER_SIZE   8192
 130
 131/* Must be power of 2 */
 132#define FIFO_BUFFER_SIZE_UL     8192
 133
 134/* Size of tmp send buffer to card */
 135#define SEND_BUF_MAX            1024
 136#define RECEIVE_BUF_MAX         4
 137
 138
 139#define R_IIR           0x0000  /* Interrupt Identity Register */
 140#define R_FCR           0x0000  /* Flow Control Register */
 141#define R_IER           0x0004  /* Interrupt Enable Register */
 142
 143#define CONFIG_MAGIC    0xEFEFFEFE
 144#define TOGGLE_VALID    0x0000
 145
 146/* Definition of interrupt tokens */
 147#define MDM_DL1         0x0001
 148#define MDM_UL1         0x0002
 149#define MDM_DL2         0x0004
 150#define MDM_UL2         0x0008
 151#define DIAG_DL1        0x0010
 152#define DIAG_DL2        0x0020
 153#define DIAG_UL         0x0040
 154#define APP1_DL         0x0080
 155#define APP1_UL         0x0100
 156#define APP2_DL         0x0200
 157#define APP2_UL         0x0400
 158#define CTRL_DL         0x0800
 159#define CTRL_UL         0x1000
 160#define RESET           0x8000
 161
 162#define MDM_DL          (MDM_DL1  | MDM_DL2)
 163#define MDM_UL          (MDM_UL1  | MDM_UL2)
 164#define DIAG_DL         (DIAG_DL1 | DIAG_DL2)
 165
 166/* modem signal definition */
 167#define CTRL_DSR        0x0001
 168#define CTRL_DCD        0x0002
 169#define CTRL_RI         0x0004
 170#define CTRL_CTS        0x0008
 171
 172#define CTRL_DTR        0x0001
 173#define CTRL_RTS        0x0002
 174
 175#define MAX_PORT                4
 176#define NOZOMI_MAX_PORTS        5
 177#define NOZOMI_MAX_CARDS        (NTTY_TTY_MAXMINORS / MAX_PORT)
 178
 179/*    Type definitions */
 180
 181/*
 182 * There are two types of nozomi cards,
 183 * one with 2048 memory and with 8192 memory
 184 */
 185enum card_type {
 186        F32_2 = 2048,   /* 512 bytes downlink + uplink * 2 -> 2048 */
 187        F32_8 = 8192,   /* 3072 bytes downl. + 1024 bytes uplink * 2 -> 8192 */
 188};
 189
 190/* Initialization states a card can be in */
 191enum card_state {
 192        NOZOMI_STATE_UKNOWN     = 0,
 193        NOZOMI_STATE_ENABLED    = 1,    /* pci device enabled */
 194        NOZOMI_STATE_ALLOCATED  = 2,    /* config setup done */
 195        NOZOMI_STATE_READY      = 3,    /* flowcontrols received */
 196};
 197
 198/* Two different toggle channels exist */
 199enum channel_type {
 200        CH_A = 0,
 201        CH_B = 1,
 202};
 203
 204/* Port definition for the card regarding flow control */
 205enum ctrl_port_type {
 206        CTRL_CMD        = 0,
 207        CTRL_MDM        = 1,
 208        CTRL_DIAG       = 2,
 209        CTRL_APP1       = 3,
 210        CTRL_APP2       = 4,
 211        CTRL_ERROR      = -1,
 212};
 213
 214/* Ports that the nozomi has */
 215enum port_type {
 216        PORT_MDM        = 0,
 217        PORT_DIAG       = 1,
 218        PORT_APP1       = 2,
 219        PORT_APP2       = 3,
 220        PORT_CTRL       = 4,
 221        PORT_ERROR      = -1,
 222};
 223
 224#ifdef __BIG_ENDIAN
 225/* Big endian */
 226
 227struct toggles {
 228        unsigned int enabled:5; /*
 229                                 * Toggle fields are valid if enabled is 0,
 230                                 * else A-channels must always be used.
 231                                 */
 232        unsigned int diag_dl:1;
 233        unsigned int mdm_dl:1;
 234        unsigned int mdm_ul:1;
 235} __attribute__ ((packed));
 236
 237/* Configuration table to read at startup of card */
 238/* Is for now only needed during initialization phase */
 239struct config_table {
 240        u32 signature;
 241        u16 product_information;
 242        u16 version;
 243        u8 pad3[3];
 244        struct toggles toggle;
 245        u8 pad1[4];
 246        u16 dl_mdm_len1;        /*
 247                                 * If this is 64, it can hold
 248                                 * 60 bytes + 4 that is length field
 249                                 */
 250        u16 dl_start;
 251
 252        u16 dl_diag_len1;
 253        u16 dl_mdm_len2;        /*
 254                                 * If this is 64, it can hold
 255                                 * 60 bytes + 4 that is length field
 256                                 */
 257        u16 dl_app1_len;
 258
 259        u16 dl_diag_len2;
 260        u16 dl_ctrl_len;
 261        u16 dl_app2_len;
 262        u8 pad2[16];
 263        u16 ul_mdm_len1;
 264        u16 ul_start;
 265        u16 ul_diag_len;
 266        u16 ul_mdm_len2;
 267        u16 ul_app1_len;
 268        u16 ul_app2_len;
 269        u16 ul_ctrl_len;
 270} __attribute__ ((packed));
 271
 272/* This stores all control downlink flags */
 273struct ctrl_dl {
 274        u8 port;
 275        unsigned int reserved:4;
 276        unsigned int CTS:1;
 277        unsigned int RI:1;
 278        unsigned int DCD:1;
 279        unsigned int DSR:1;
 280} __attribute__ ((packed));
 281
 282/* This stores all control uplink flags */
 283struct ctrl_ul {
 284        u8 port;
 285        unsigned int reserved:6;
 286        unsigned int RTS:1;
 287        unsigned int DTR:1;
 288} __attribute__ ((packed));
 289
 290#else
 291/* Little endian */
 292
 293/* This represents the toggle information */
 294struct toggles {
 295        unsigned int mdm_ul:1;
 296        unsigned int mdm_dl:1;
 297        unsigned int diag_dl:1;
 298        unsigned int enabled:5; /*
 299                                 * Toggle fields are valid if enabled is 0,
 300                                 * else A-channels must always be used.
 301                                 */
 302} __attribute__ ((packed));
 303
 304/* Configuration table to read at startup of card */
 305struct config_table {
 306        u32 signature;
 307        u16 version;
 308        u16 product_information;
 309        struct toggles toggle;
 310        u8 pad1[7];
 311        u16 dl_start;
 312        u16 dl_mdm_len1;        /*
 313                                 * If this is 64, it can hold
 314                                 * 60 bytes + 4 that is length field
 315                                 */
 316        u16 dl_mdm_len2;
 317        u16 dl_diag_len1;
 318        u16 dl_diag_len2;
 319        u16 dl_app1_len;
 320        u16 dl_app2_len;
 321        u16 dl_ctrl_len;
 322        u8 pad2[16];
 323        u16 ul_start;
 324        u16 ul_mdm_len2;
 325        u16 ul_mdm_len1;
 326        u16 ul_diag_len;
 327        u16 ul_app1_len;
 328        u16 ul_app2_len;
 329        u16 ul_ctrl_len;
 330} __attribute__ ((packed));
 331
 332/* This stores all control downlink flags */
 333struct ctrl_dl {
 334        unsigned int DSR:1;
 335        unsigned int DCD:1;
 336        unsigned int RI:1;
 337        unsigned int CTS:1;
 338        unsigned int reserverd:4;
 339        u8 port;
 340} __attribute__ ((packed));
 341
 342/* This stores all control uplink flags */
 343struct ctrl_ul {
 344        unsigned int DTR:1;
 345        unsigned int RTS:1;
 346        unsigned int reserved:6;
 347        u8 port;
 348} __attribute__ ((packed));
 349#endif
 350
 351/* This holds all information that is needed regarding a port */
 352struct port {
 353        struct tty_port port;
 354        u8 update_flow_control;
 355        struct ctrl_ul ctrl_ul;
 356        struct ctrl_dl ctrl_dl;
 357        struct kfifo fifo_ul;
 358        void __iomem *dl_addr[2];
 359        u32 dl_size[2];
 360        u8 toggle_dl;
 361        void __iomem *ul_addr[2];
 362        u32 ul_size[2];
 363        u8 toggle_ul;
 364        u16 token_dl;
 365
 366        wait_queue_head_t tty_wait;
 367        struct async_icount tty_icount;
 368
 369        struct nozomi *dc;
 370};
 371
 372/* Private data one for each card in the system */
 373struct nozomi {
 374        void __iomem *base_addr;
 375        unsigned long flip;
 376
 377        /* Pointers to registers */
 378        void __iomem *reg_iir;
 379        void __iomem *reg_fcr;
 380        void __iomem *reg_ier;
 381
 382        u16 last_ier;
 383        enum card_type card_type;
 384        struct config_table config_table;       /* Configuration table */
 385        struct pci_dev *pdev;
 386        struct port port[NOZOMI_MAX_PORTS];
 387        u8 *send_buf;
 388
 389        spinlock_t spin_mutex;  /* secures access to registers and tty */
 390
 391        unsigned int index_start;
 392        enum card_state state;
 393        u32 open_ttys;
 394};
 395
 396/* This is a data packet that is read or written to/from card */
 397struct buffer {
 398        u32 size;               /* size is the length of the data buffer */
 399        u8 *data;
 400} __attribute__ ((packed));
 401
 402/*    Global variables */
 403static const struct pci_device_id nozomi_pci_tbl[] __devinitconst = {
 404        {PCI_DEVICE(0x1931, 0x000c)},   /* Nozomi HSDPA */
 405        {},
 406};
 407
 408MODULE_DEVICE_TABLE(pci, nozomi_pci_tbl);
 409
 410static struct nozomi *ndevs[NOZOMI_MAX_CARDS];
 411static struct tty_driver *ntty_driver;
 412
 413static const struct tty_port_operations noz_tty_port_ops;
 414
 415/*
 416 * find card by tty_index
 417 */
 418static inline struct nozomi *get_dc_by_tty(const struct tty_struct *tty)
 419{
 420        return tty ? ndevs[tty->index / MAX_PORT] : NULL;
 421}
 422
 423static inline struct port *get_port_by_tty(const struct tty_struct *tty)
 424{
 425        struct nozomi *ndev = get_dc_by_tty(tty);
 426        return ndev ? &ndev->port[tty->index % MAX_PORT] : NULL;
 427}
 428
 429/*
 430 * TODO:
 431 * -Optimize
 432 * -Rewrite cleaner
 433 */
 434
 435static void read_mem32(u32 *buf, const void __iomem *mem_addr_start,
 436                        u32 size_bytes)
 437{
 438        u32 i = 0;
 439        const u32 __iomem *ptr = mem_addr_start;
 440        u16 *buf16;
 441
 442        if (unlikely(!ptr || !buf))
 443                goto out;
 444
 445        /* shortcut for extremely often used cases */
 446        switch (size_bytes) {
 447        case 2: /* 2 bytes */
 448                buf16 = (u16 *) buf;
 449                *buf16 = __le16_to_cpu(readw(ptr));
 450                goto out;
 451                break;
 452        case 4: /* 4 bytes */
 453                *(buf) = __le32_to_cpu(readl(ptr));
 454                goto out;
 455                break;
 456        }
 457
 458        while (i < size_bytes) {
 459                if (size_bytes - i == 2) {
 460                        /* Handle 2 bytes in the end */
 461                        buf16 = (u16 *) buf;
 462                        *(buf16) = __le16_to_cpu(readw(ptr));
 463                        i += 2;
 464                } else {
 465                        /* Read 4 bytes */
 466                        *(buf) = __le32_to_cpu(readl(ptr));
 467                        i += 4;
 468                }
 469                buf++;
 470                ptr++;
 471        }
 472out:
 473        return;
 474}
 475
 476/*
 477 * TODO:
 478 * -Optimize
 479 * -Rewrite cleaner
 480 */
 481static u32 write_mem32(void __iomem *mem_addr_start, const u32 *buf,
 482                        u32 size_bytes)
 483{
 484        u32 i = 0;
 485        u32 __iomem *ptr = mem_addr_start;
 486        const u16 *buf16;
 487
 488        if (unlikely(!ptr || !buf))
 489                return 0;
 490
 491        /* shortcut for extremely often used cases */
 492        switch (size_bytes) {
 493        case 2: /* 2 bytes */
 494                buf16 = (const u16 *)buf;
 495                writew(__cpu_to_le16(*buf16), ptr);
 496                return 2;
 497                break;
 498        case 1: /*
 499                 * also needs to write 4 bytes in this case
 500                 * so falling through..
 501                 */
 502        case 4: /* 4 bytes */
 503                writel(__cpu_to_le32(*buf), ptr);
 504                return 4;
 505                break;
 506        }
 507
 508        while (i < size_bytes) {
 509                if (size_bytes - i == 2) {
 510                        /* 2 bytes */
 511                        buf16 = (const u16 *)buf;
 512                        writew(__cpu_to_le16(*buf16), ptr);
 513                        i += 2;
 514                } else {
 515                        /* 4 bytes */
 516                        writel(__cpu_to_le32(*buf), ptr);
 517                        i += 4;
 518                }
 519                buf++;
 520                ptr++;
 521        }
 522        return i;
 523}
 524
 525/* Setup pointers to different channels and also setup buffer sizes. */
 526static void setup_memory(struct nozomi *dc)
 527{
 528        void __iomem *offset = dc->base_addr + dc->config_table.dl_start;
 529        /* The length reported is including the length field of 4 bytes,
 530         * hence subtract with 4.
 531         */
 532        const u16 buff_offset = 4;
 533
 534        /* Modem port dl configuration */
 535        dc->port[PORT_MDM].dl_addr[CH_A] = offset;
 536        dc->port[PORT_MDM].dl_addr[CH_B] =
 537                                (offset += dc->config_table.dl_mdm_len1);
 538        dc->port[PORT_MDM].dl_size[CH_A] =
 539                                dc->config_table.dl_mdm_len1 - buff_offset;
 540        dc->port[PORT_MDM].dl_size[CH_B] =
 541                                dc->config_table.dl_mdm_len2 - buff_offset;
 542
 543        /* Diag port dl configuration */
 544        dc->port[PORT_DIAG].dl_addr[CH_A] =
 545                                (offset += dc->config_table.dl_mdm_len2);
 546        dc->port[PORT_DIAG].dl_size[CH_A] =
 547                                dc->config_table.dl_diag_len1 - buff_offset;
 548        dc->port[PORT_DIAG].dl_addr[CH_B] =
 549                                (offset += dc->config_table.dl_diag_len1);
 550        dc->port[PORT_DIAG].dl_size[CH_B] =
 551                                dc->config_table.dl_diag_len2 - buff_offset;
 552
 553        /* App1 port dl configuration */
 554        dc->port[PORT_APP1].dl_addr[CH_A] =
 555                                (offset += dc->config_table.dl_diag_len2);
 556        dc->port[PORT_APP1].dl_size[CH_A] =
 557                                dc->config_table.dl_app1_len - buff_offset;
 558
 559        /* App2 port dl configuration */
 560        dc->port[PORT_APP2].dl_addr[CH_A] =
 561                                (offset += dc->config_table.dl_app1_len);
 562        dc->port[PORT_APP2].dl_size[CH_A] =
 563                                dc->config_table.dl_app2_len - buff_offset;
 564
 565        /* Ctrl dl configuration */
 566        dc->port[PORT_CTRL].dl_addr[CH_A] =
 567                                (offset += dc->config_table.dl_app2_len);
 568        dc->port[PORT_CTRL].dl_size[CH_A] =
 569                                dc->config_table.dl_ctrl_len - buff_offset;
 570
 571        offset = dc->base_addr + dc->config_table.ul_start;
 572
 573        /* Modem Port ul configuration */
 574        dc->port[PORT_MDM].ul_addr[CH_A] = offset;
 575        dc->port[PORT_MDM].ul_size[CH_A] =
 576                                dc->config_table.ul_mdm_len1 - buff_offset;
 577        dc->port[PORT_MDM].ul_addr[CH_B] =
 578                                (offset += dc->config_table.ul_mdm_len1);
 579        dc->port[PORT_MDM].ul_size[CH_B] =
 580                                dc->config_table.ul_mdm_len2 - buff_offset;
 581
 582        /* Diag port ul configuration */
 583        dc->port[PORT_DIAG].ul_addr[CH_A] =
 584                                (offset += dc->config_table.ul_mdm_len2);
 585        dc->port[PORT_DIAG].ul_size[CH_A] =
 586                                dc->config_table.ul_diag_len - buff_offset;
 587
 588        /* App1 port ul configuration */
 589        dc->port[PORT_APP1].ul_addr[CH_A] =
 590                                (offset += dc->config_table.ul_diag_len);
 591        dc->port[PORT_APP1].ul_size[CH_A] =
 592                                dc->config_table.ul_app1_len - buff_offset;
 593
 594        /* App2 port ul configuration */
 595        dc->port[PORT_APP2].ul_addr[CH_A] =
 596                                (offset += dc->config_table.ul_app1_len);
 597        dc->port[PORT_APP2].ul_size[CH_A] =
 598                                dc->config_table.ul_app2_len - buff_offset;
 599
 600        /* Ctrl ul configuration */
 601        dc->port[PORT_CTRL].ul_addr[CH_A] =
 602                                (offset += dc->config_table.ul_app2_len);
 603        dc->port[PORT_CTRL].ul_size[CH_A] =
 604                                dc->config_table.ul_ctrl_len - buff_offset;
 605}
 606
 607/* Dump config table under initalization phase */
 608#ifdef DEBUG
 609static void dump_table(const struct nozomi *dc)
 610{
 611        DBG3("signature: 0x%08X", dc->config_table.signature);
 612        DBG3("version: 0x%04X", dc->config_table.version);
 613        DBG3("product_information: 0x%04X", \
 614                                dc->config_table.product_information);
 615        DBG3("toggle enabled: %d", dc->config_table.toggle.enabled);
 616        DBG3("toggle up_mdm: %d", dc->config_table.toggle.mdm_ul);
 617        DBG3("toggle dl_mdm: %d", dc->config_table.toggle.mdm_dl);
 618        DBG3("toggle dl_dbg: %d", dc->config_table.toggle.diag_dl);
 619
 620        DBG3("dl_start: 0x%04X", dc->config_table.dl_start);
 621        DBG3("dl_mdm_len0: 0x%04X, %d", dc->config_table.dl_mdm_len1,
 622           dc->config_table.dl_mdm_len1);
 623        DBG3("dl_mdm_len1: 0x%04X, %d", dc->config_table.dl_mdm_len2,
 624           dc->config_table.dl_mdm_len2);
 625        DBG3("dl_diag_len0: 0x%04X, %d", dc->config_table.dl_diag_len1,
 626           dc->config_table.dl_diag_len1);
 627        DBG3("dl_diag_len1: 0x%04X, %d", dc->config_table.dl_diag_len2,
 628           dc->config_table.dl_diag_len2);
 629        DBG3("dl_app1_len: 0x%04X, %d", dc->config_table.dl_app1_len,
 630           dc->config_table.dl_app1_len);
 631        DBG3("dl_app2_len: 0x%04X, %d", dc->config_table.dl_app2_len,
 632           dc->config_table.dl_app2_len);
 633        DBG3("dl_ctrl_len: 0x%04X, %d", dc->config_table.dl_ctrl_len,
 634           dc->config_table.dl_ctrl_len);
 635        DBG3("ul_start: 0x%04X, %d", dc->config_table.ul_start,
 636           dc->config_table.ul_start);
 637        DBG3("ul_mdm_len[0]: 0x%04X, %d", dc->config_table.ul_mdm_len1,
 638           dc->config_table.ul_mdm_len1);
 639        DBG3("ul_mdm_len[1]: 0x%04X, %d", dc->config_table.ul_mdm_len2,
 640           dc->config_table.ul_mdm_len2);
 641        DBG3("ul_diag_len: 0x%04X, %d", dc->config_table.ul_diag_len,
 642           dc->config_table.ul_diag_len);
 643        DBG3("ul_app1_len: 0x%04X, %d", dc->config_table.ul_app1_len,
 644           dc->config_table.ul_app1_len);
 645        DBG3("ul_app2_len: 0x%04X, %d", dc->config_table.ul_app2_len,
 646           dc->config_table.ul_app2_len);
 647        DBG3("ul_ctrl_len: 0x%04X, %d", dc->config_table.ul_ctrl_len,
 648           dc->config_table.ul_ctrl_len);
 649}
 650#else
 651static inline void dump_table(const struct nozomi *dc) { }
 652#endif
 653
 654/*
 655 * Read configuration table from card under intalization phase
 656 * Returns 1 if ok, else 0
 657 */
 658static int nozomi_read_config_table(struct nozomi *dc)
 659{
 660        read_mem32((u32 *) &dc->config_table, dc->base_addr + 0,
 661                                                sizeof(struct config_table));
 662
 663        if (dc->config_table.signature != CONFIG_MAGIC) {
 664                dev_err(&dc->pdev->dev, "ConfigTable Bad! 0x%08X != 0x%08X\n",
 665                        dc->config_table.signature, CONFIG_MAGIC);
 666                return 0;
 667        }
 668
 669        if ((dc->config_table.version == 0)
 670            || (dc->config_table.toggle.enabled == TOGGLE_VALID)) {
 671                int i;
 672                DBG1("Second phase, configuring card");
 673
 674                setup_memory(dc);
 675
 676                dc->port[PORT_MDM].toggle_ul = dc->config_table.toggle.mdm_ul;
 677                dc->port[PORT_MDM].toggle_dl = dc->config_table.toggle.mdm_dl;
 678                dc->port[PORT_DIAG].toggle_dl = dc->config_table.toggle.diag_dl;
 679                DBG1("toggle ports: MDM UL:%d MDM DL:%d, DIAG DL:%d",
 680                   dc->port[PORT_MDM].toggle_ul,
 681                   dc->port[PORT_MDM].toggle_dl, dc->port[PORT_DIAG].toggle_dl);
 682
 683                dump_table(dc);
 684
 685                for (i = PORT_MDM; i < MAX_PORT; i++) {
 686                        memset(&dc->port[i].ctrl_dl, 0, sizeof(struct ctrl_dl));
 687                        memset(&dc->port[i].ctrl_ul, 0, sizeof(struct ctrl_ul));
 688                }
 689
 690                /* Enable control channel */
 691                dc->last_ier = dc->last_ier | CTRL_DL;
 692                writew(dc->last_ier, dc->reg_ier);
 693
 694                dc->state = NOZOMI_STATE_ALLOCATED;
 695                dev_info(&dc->pdev->dev, "Initialization OK!\n");
 696                return 1;
 697        }
 698
 699        if ((dc->config_table.version > 0)
 700            && (dc->config_table.toggle.enabled != TOGGLE_VALID)) {
 701                u32 offset = 0;
 702                DBG1("First phase: pushing upload buffers, clearing download");
 703
 704                dev_info(&dc->pdev->dev, "Version of card: %d\n",
 705                         dc->config_table.version);
 706
 707                /* Here we should disable all I/O over F32. */
 708                setup_memory(dc);
 709
 710                /*
 711                 * We should send ALL channel pair tokens back along
 712                 * with reset token
 713                 */
 714
 715                /* push upload modem buffers */
 716                write_mem32(dc->port[PORT_MDM].ul_addr[CH_A],
 717                        (u32 *) &offset, 4);
 718                write_mem32(dc->port[PORT_MDM].ul_addr[CH_B],
 719                        (u32 *) &offset, 4);
 720
 721                writew(MDM_UL | DIAG_DL | MDM_DL, dc->reg_fcr);
 722
 723                DBG1("First phase done");
 724        }
 725
 726        return 1;
 727}
 728
 729/* Enable uplink interrupts  */
 730static void enable_transmit_ul(enum port_type port, struct nozomi *dc)
 731{
 732        static const u16 mask[] = {MDM_UL, DIAG_UL, APP1_UL, APP2_UL, CTRL_UL};
 733
 734        if (port < NOZOMI_MAX_PORTS) {
 735                dc->last_ier |= mask[port];
 736                writew(dc->last_ier, dc->reg_ier);
 737        } else {
 738                dev_err(&dc->pdev->dev, "Called with wrong port?\n");
 739        }
 740}
 741
 742/* Disable uplink interrupts  */
 743static void disable_transmit_ul(enum port_type port, struct nozomi *dc)
 744{
 745        static const u16 mask[] =
 746                {~MDM_UL, ~DIAG_UL, ~APP1_UL, ~APP2_UL, ~CTRL_UL};
 747
 748        if (port < NOZOMI_MAX_PORTS) {
 749                dc->last_ier &= mask[port];
 750                writew(dc->last_ier, dc->reg_ier);
 751        } else {
 752                dev_err(&dc->pdev->dev, "Called with wrong port?\n");
 753        }
 754}
 755
 756/* Enable downlink interrupts */
 757static void enable_transmit_dl(enum port_type port, struct nozomi *dc)
 758{
 759        static const u16 mask[] = {MDM_DL, DIAG_DL, APP1_DL, APP2_DL, CTRL_DL};
 760
 761        if (port < NOZOMI_MAX_PORTS) {
 762                dc->last_ier |= mask[port];
 763                writew(dc->last_ier, dc->reg_ier);
 764        } else {
 765                dev_err(&dc->pdev->dev, "Called with wrong port?\n");
 766        }
 767}
 768
 769/* Disable downlink interrupts */
 770static void disable_transmit_dl(enum port_type port, struct nozomi *dc)
 771{
 772        static const u16 mask[] =
 773                {~MDM_DL, ~DIAG_DL, ~APP1_DL, ~APP2_DL, ~CTRL_DL};
 774
 775        if (port < NOZOMI_MAX_PORTS) {
 776                dc->last_ier &= mask[port];
 777                writew(dc->last_ier, dc->reg_ier);
 778        } else {
 779                dev_err(&dc->pdev->dev, "Called with wrong port?\n");
 780        }
 781}
 782
 783/*
 784 * Return 1 - send buffer to card and ack.
 785 * Return 0 - don't ack, don't send buffer to card.
 786 */
 787static int send_data(enum port_type index, struct nozomi *dc)
 788{
 789        u32 size = 0;
 790        struct port *port = &dc->port[index];
 791        const u8 toggle = port->toggle_ul;
 792        void __iomem *addr = port->ul_addr[toggle];
 793        const u32 ul_size = port->ul_size[toggle];
 794        struct tty_struct *tty = tty_port_tty_get(&port->port);
 795
 796        /* Get data from tty and place in buf for now */
 797        size = kfifo_out(&port->fifo_ul, dc->send_buf,
 798                           ul_size < SEND_BUF_MAX ? ul_size : SEND_BUF_MAX);
 799
 800        if (size == 0) {
 801                DBG4("No more data to send, disable link:");
 802                tty_kref_put(tty);
 803                return 0;
 804        }
 805
 806        /* DUMP(buf, size); */
 807
 808        /* Write length + data */
 809        write_mem32(addr, (u32 *) &size, 4);
 810        write_mem32(addr + 4, (u32 *) dc->send_buf, size);
 811
 812        if (tty)
 813                tty_wakeup(tty);
 814
 815        tty_kref_put(tty);
 816        return 1;
 817}
 818
 819/* If all data has been read, return 1, else 0 */
 820static int receive_data(enum port_type index, struct nozomi *dc)
 821{
 822        u8 buf[RECEIVE_BUF_MAX] = { 0 };
 823        int size;
 824        u32 offset = 4;
 825        struct port *port = &dc->port[index];
 826        void __iomem *addr = port->dl_addr[port->toggle_dl];
 827        struct tty_struct *tty = tty_port_tty_get(&port->port);
 828        int i, ret;
 829
 830        if (unlikely(!tty)) {
 831                DBG1("tty not open for port: %d?", index);
 832                return 1;
 833        }
 834
 835        read_mem32((u32 *) &size, addr, 4);
 836        /*  DBG1( "%d bytes port: %d", size, index); */
 837
 838        if (test_bit(TTY_THROTTLED, &tty->flags)) {
 839                DBG1("No room in tty, don't read data, don't ack interrupt, "
 840                        "disable interrupt");
 841
 842                /* disable interrupt in downlink... */
 843                disable_transmit_dl(index, dc);
 844                ret = 0;
 845                goto put;
 846        }
 847
 848        if (unlikely(size == 0)) {
 849                dev_err(&dc->pdev->dev, "size == 0?\n");
 850                ret = 1;
 851                goto put;
 852        }
 853
 854        while (size > 0) {
 855                read_mem32((u32 *) buf, addr + offset, RECEIVE_BUF_MAX);
 856
 857                if (size == 1) {
 858                        tty_insert_flip_char(tty, buf[0], TTY_NORMAL);
 859                        size = 0;
 860                } else if (size < RECEIVE_BUF_MAX) {
 861                        size -= tty_insert_flip_string(tty, (char *) buf, size);
 862                } else {
 863                        i = tty_insert_flip_string(tty, \
 864                                                (char *) buf, RECEIVE_BUF_MAX);
 865                        size -= i;
 866                        offset += i;
 867                }
 868        }
 869
 870        set_bit(index, &dc->flip);
 871        ret = 1;
 872put:
 873        tty_kref_put(tty);
 874        return ret;
 875}
 876
 877/* Debug for interrupts */
 878#ifdef DEBUG
 879static char *interrupt2str(u16 interrupt)
 880{
 881        static char buf[TMP_BUF_MAX];
 882        char *p = buf;
 883
 884        interrupt & MDM_DL1 ? p += snprintf(p, TMP_BUF_MAX, "MDM_DL1 ") : NULL;
 885        interrupt & MDM_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 886                                        "MDM_DL2 ") : NULL;
 887
 888        interrupt & MDM_UL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 889                                        "MDM_UL1 ") : NULL;
 890        interrupt & MDM_UL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 891                                        "MDM_UL2 ") : NULL;
 892
 893        interrupt & DIAG_DL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 894                                        "DIAG_DL1 ") : NULL;
 895        interrupt & DIAG_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 896                                        "DIAG_DL2 ") : NULL;
 897
 898        interrupt & DIAG_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 899                                        "DIAG_UL ") : NULL;
 900
 901        interrupt & APP1_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 902                                        "APP1_DL ") : NULL;
 903        interrupt & APP2_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 904                                        "APP2_DL ") : NULL;
 905
 906        interrupt & APP1_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 907                                        "APP1_UL ") : NULL;
 908        interrupt & APP2_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 909                                        "APP2_UL ") : NULL;
 910
 911        interrupt & CTRL_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 912                                        "CTRL_DL ") : NULL;
 913        interrupt & CTRL_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 914                                        "CTRL_UL ") : NULL;
 915
 916        interrupt & RESET ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 917                                        "RESET ") : NULL;
 918
 919        return buf;
 920}
 921#endif
 922
 923/*
 924 * Receive flow control
 925 * Return 1 - If ok, else 0
 926 */
 927static int receive_flow_control(struct nozomi *dc)
 928{
 929        enum port_type port = PORT_MDM;
 930        struct ctrl_dl ctrl_dl;
 931        struct ctrl_dl old_ctrl;
 932        u16 enable_ier = 0;
 933
 934        read_mem32((u32 *) &ctrl_dl, dc->port[PORT_CTRL].dl_addr[CH_A], 2);
 935
 936        switch (ctrl_dl.port) {
 937        case CTRL_CMD:
 938                DBG1("The Base Band sends this value as a response to a "
 939                        "request for IMSI detach sent over the control "
 940                        "channel uplink (see section 7.6.1).");
 941                break;
 942        case CTRL_MDM:
 943                port = PORT_MDM;
 944                enable_ier = MDM_DL;
 945                break;
 946        case CTRL_DIAG:
 947                port = PORT_DIAG;
 948                enable_ier = DIAG_DL;
 949                break;
 950        case CTRL_APP1:
 951                port = PORT_APP1;
 952                enable_ier = APP1_DL;
 953                break;
 954        case CTRL_APP2:
 955                port = PORT_APP2;
 956                enable_ier = APP2_DL;
 957                if (dc->state == NOZOMI_STATE_ALLOCATED) {
 958                        /*
 959                         * After card initialization the flow control
 960                         * received for APP2 is always the last
 961                         */
 962                        dc->state = NOZOMI_STATE_READY;
 963                        dev_info(&dc->pdev->dev, "Device READY!\n");
 964                }
 965                break;
 966        default:
 967                dev_err(&dc->pdev->dev,
 968                        "ERROR: flow control received for non-existing port\n");
 969                return 0;
 970        };
 971
 972        DBG1("0x%04X->0x%04X", *((u16 *)&dc->port[port].ctrl_dl),
 973           *((u16 *)&ctrl_dl));
 974
 975        old_ctrl = dc->port[port].ctrl_dl;
 976        dc->port[port].ctrl_dl = ctrl_dl;
 977
 978        if (old_ctrl.CTS == 1 && ctrl_dl.CTS == 0) {
 979                DBG1("Disable interrupt (0x%04X) on port: %d",
 980                        enable_ier, port);
 981                disable_transmit_ul(port, dc);
 982
 983        } else if (old_ctrl.CTS == 0 && ctrl_dl.CTS == 1) {
 984
 985                if (kfifo_len(&dc->port[port].fifo_ul)) {
 986                        DBG1("Enable interrupt (0x%04X) on port: %d",
 987                                enable_ier, port);
 988                        DBG1("Data in buffer [%d], enable transmit! ",
 989                                kfifo_len(&dc->port[port].fifo_ul));
 990                        enable_transmit_ul(port, dc);
 991                } else {
 992                        DBG1("No data in buffer...");
 993                }
 994        }
 995
 996        if (*(u16 *)&old_ctrl == *(u16 *)&ctrl_dl) {
 997                DBG1(" No change in mctrl");
 998                return 1;
 999        }
1000        /* Update statistics */
1001        if (old_ctrl.CTS != ctrl_dl.CTS)
1002                dc->port[port].tty_icount.cts++;
1003        if (old_ctrl.DSR != ctrl_dl.DSR)
1004                dc->port[port].tty_icount.dsr++;
1005        if (old_ctrl.RI != ctrl_dl.RI)
1006                dc->port[port].tty_icount.rng++;
1007        if (old_ctrl.DCD != ctrl_dl.DCD)
1008                dc->port[port].tty_icount.dcd++;
1009
1010        wake_up_interruptible(&dc->port[port].tty_wait);
1011
1012        DBG1("port: %d DCD(%d), CTS(%d), RI(%d), DSR(%d)",
1013           port,
1014           dc->port[port].tty_icount.dcd, dc->port[port].tty_icount.cts,
1015           dc->port[port].tty_icount.rng, dc->port[port].tty_icount.dsr);
1016
1017        return 1;
1018}
1019
1020static enum ctrl_port_type port2ctrl(enum port_type port,
1021                                        const struct nozomi *dc)
1022{
1023        switch (port) {
1024        case PORT_MDM:
1025                return CTRL_MDM;
1026        case PORT_DIAG:
1027                return CTRL_DIAG;
1028        case PORT_APP1:
1029                return CTRL_APP1;
1030        case PORT_APP2:
1031                return CTRL_APP2;
1032        default:
1033                dev_err(&dc->pdev->dev,
1034                        "ERROR: send flow control " \
1035                        "received for non-existing port\n");
1036        };
1037        return CTRL_ERROR;
1038}
1039
1040/*
1041 * Send flow control, can only update one channel at a time
1042 * Return 0 - If we have updated all flow control
1043 * Return 1 - If we need to update more flow control, ack current enable more
1044 */
1045static int send_flow_control(struct nozomi *dc)
1046{
1047        u32 i, more_flow_control_to_be_updated = 0;
1048        u16 *ctrl;
1049
1050        for (i = PORT_MDM; i < MAX_PORT; i++) {
1051                if (dc->port[i].update_flow_control) {
1052                        if (more_flow_control_to_be_updated) {
1053                                /* We have more flow control to be updated */
1054                                return 1;
1055                        }
1056                        dc->port[i].ctrl_ul.port = port2ctrl(i, dc);
1057                        ctrl = (u16 *)&dc->port[i].ctrl_ul;
1058                        write_mem32(dc->port[PORT_CTRL].ul_addr[0], \
1059                                (u32 *) ctrl, 2);
1060                        dc->port[i].update_flow_control = 0;
1061                        more_flow_control_to_be_updated = 1;
1062                }
1063        }
1064        return 0;
1065}
1066
1067/*
1068 * Handle downlink data, ports that are handled are modem and diagnostics
1069 * Return 1 - ok
1070 * Return 0 - toggle fields are out of sync
1071 */
1072static int handle_data_dl(struct nozomi *dc, enum port_type port, u8 *toggle,
1073                        u16 read_iir, u16 mask1, u16 mask2)
1074{
1075        if (*toggle == 0 && read_iir & mask1) {
1076                if (receive_data(port, dc)) {
1077                        writew(mask1, dc->reg_fcr);
1078                        *toggle = !(*toggle);
1079                }
1080
1081                if (read_iir & mask2) {
1082                        if (receive_data(port, dc)) {
1083                                writew(mask2, dc->reg_fcr);
1084                                *toggle = !(*toggle);
1085                        }
1086                }
1087        } else if (*toggle == 1 && read_iir & mask2) {
1088                if (receive_data(port, dc)) {
1089                        writew(mask2, dc->reg_fcr);
1090                        *toggle = !(*toggle);
1091                }
1092
1093                if (read_iir & mask1) {
1094                        if (receive_data(port, dc)) {
1095                                writew(mask1, dc->reg_fcr);
1096                                *toggle = !(*toggle);
1097                        }
1098                }
1099        } else {
1100                dev_err(&dc->pdev->dev, "port out of sync!, toggle:%d\n",
1101                        *toggle);
1102                return 0;
1103        }
1104        return 1;
1105}
1106
1107/*
1108 * Handle uplink data, this is currently for the modem port
1109 * Return 1 - ok
1110 * Return 0 - toggle field are out of sync
1111 */
1112static int handle_data_ul(struct nozomi *dc, enum port_type port, u16 read_iir)
1113{
1114        u8 *toggle = &(dc->port[port].toggle_ul);
1115
1116        if (*toggle == 0 && read_iir & MDM_UL1) {
1117                dc->last_ier &= ~MDM_UL;
1118                writew(dc->last_ier, dc->reg_ier);
1119                if (send_data(port, dc)) {
1120                        writew(MDM_UL1, dc->reg_fcr);
1121                        dc->last_ier = dc->last_ier | MDM_UL;
1122                        writew(dc->last_ier, dc->reg_ier);
1123                        *toggle = !*toggle;
1124                }
1125
1126                if (read_iir & MDM_UL2) {
1127                        dc->last_ier &= ~MDM_UL;
1128                        writew(dc->last_ier, dc->reg_ier);
1129                        if (send_data(port, dc)) {
1130                                writew(MDM_UL2, dc->reg_fcr);
1131                                dc->last_ier = dc->last_ier | MDM_UL;
1132                                writew(dc->last_ier, dc->reg_ier);
1133                                *toggle = !*toggle;
1134                        }
1135                }
1136
1137        } else if (*toggle == 1 && read_iir & MDM_UL2) {
1138                dc->last_ier &= ~MDM_UL;
1139                writew(dc->last_ier, dc->reg_ier);
1140                if (send_data(port, dc)) {
1141                        writew(MDM_UL2, dc->reg_fcr);
1142                        dc->last_ier = dc->last_ier | MDM_UL;
1143                        writew(dc->last_ier, dc->reg_ier);
1144                        *toggle = !*toggle;
1145                }
1146
1147                if (read_iir & MDM_UL1) {
1148                        dc->last_ier &= ~MDM_UL;
1149                        writew(dc->last_ier, dc->reg_ier);
1150                        if (send_data(port, dc)) {
1151                                writew(MDM_UL1, dc->reg_fcr);
1152                                dc->last_ier = dc->last_ier | MDM_UL;
1153                                writew(dc->last_ier, dc->reg_ier);
1154                                *toggle = !*toggle;
1155                        }
1156                }
1157        } else {
1158                writew(read_iir & MDM_UL, dc->reg_fcr);
1159                dev_err(&dc->pdev->dev, "port out of sync!\n");
1160                return 0;
1161        }
1162        return 1;
1163}
1164
1165static irqreturn_t interrupt_handler(int irq, void *dev_id)
1166{
1167        struct nozomi *dc = dev_id;
1168        unsigned int a;
1169        u16 read_iir;
1170
1171        if (!dc)
1172                return IRQ_NONE;
1173
1174        spin_lock(&dc->spin_mutex);
1175        read_iir = readw(dc->reg_iir);
1176
1177        /* Card removed */
1178        if (read_iir == (u16)-1)
1179                goto none;
1180        /*
1181         * Just handle interrupt enabled in IER
1182         * (by masking with dc->last_ier)
1183         */
1184        read_iir &= dc->last_ier;
1185
1186        if (read_iir == 0)
1187                goto none;
1188
1189
1190        DBG4("%s irq:0x%04X, prev:0x%04X", interrupt2str(read_iir), read_iir,
1191                dc->last_ier);
1192
1193        if (read_iir & RESET) {
1194                if (unlikely(!nozomi_read_config_table(dc))) {
1195                        dc->last_ier = 0x0;
1196                        writew(dc->last_ier, dc->reg_ier);
1197                        dev_err(&dc->pdev->dev, "Could not read status from "
1198                                "card, we should disable interface\n");
1199                } else {
1200                        writew(RESET, dc->reg_fcr);
1201                }
1202                /* No more useful info if this was the reset interrupt. */
1203                goto exit_handler;
1204        }
1205        if (read_iir & CTRL_UL) {
1206                DBG1("CTRL_UL");
1207                dc->last_ier &= ~CTRL_UL;
1208                writew(dc->last_ier, dc->reg_ier);
1209                if (send_flow_control(dc)) {
1210                        writew(CTRL_UL, dc->reg_fcr);
1211                        dc->last_ier = dc->last_ier | CTRL_UL;
1212                        writew(dc->last_ier, dc->reg_ier);
1213                }
1214        }
1215        if (read_iir & CTRL_DL) {
1216                receive_flow_control(dc);
1217                writew(CTRL_DL, dc->reg_fcr);
1218        }
1219        if (read_iir & MDM_DL) {
1220                if (!handle_data_dl(dc, PORT_MDM,
1221                                &(dc->port[PORT_MDM].toggle_dl), read_iir,
1222                                MDM_DL1, MDM_DL2)) {
1223                        dev_err(&dc->pdev->dev, "MDM_DL out of sync!\n");
1224                        goto exit_handler;
1225                }
1226        }
1227        if (read_iir & MDM_UL) {
1228                if (!handle_data_ul(dc, PORT_MDM, read_iir)) {
1229                        dev_err(&dc->pdev->dev, "MDM_UL out of sync!\n");
1230                        goto exit_handler;
1231                }
1232        }
1233        if (read_iir & DIAG_DL) {
1234                if (!handle_data_dl(dc, PORT_DIAG,
1235                                &(dc->port[PORT_DIAG].toggle_dl), read_iir,
1236                                DIAG_DL1, DIAG_DL2)) {
1237                        dev_err(&dc->pdev->dev, "DIAG_DL out of sync!\n");
1238                        goto exit_handler;
1239                }
1240        }
1241        if (read_iir & DIAG_UL) {
1242                dc->last_ier &= ~DIAG_UL;
1243                writew(dc->last_ier, dc->reg_ier);
1244                if (send_data(PORT_DIAG, dc)) {
1245                        writew(DIAG_UL, dc->reg_fcr);
1246                        dc->last_ier = dc->last_ier | DIAG_UL;
1247                        writew(dc->last_ier, dc->reg_ier);
1248                }
1249        }
1250        if (read_iir & APP1_DL) {
1251                if (receive_data(PORT_APP1, dc))
1252                        writew(APP1_DL, dc->reg_fcr);
1253        }
1254        if (read_iir & APP1_UL) {
1255                dc->last_ier &= ~APP1_UL;
1256                writew(dc->last_ier, dc->reg_ier);
1257                if (send_data(PORT_APP1, dc)) {
1258                        writew(APP1_UL, dc->reg_fcr);
1259                        dc->last_ier = dc->last_ier | APP1_UL;
1260                        writew(dc->last_ier, dc->reg_ier);
1261                }
1262        }
1263        if (read_iir & APP2_DL) {
1264                if (receive_data(PORT_APP2, dc))
1265                        writew(APP2_DL, dc->reg_fcr);
1266        }
1267        if (read_iir & APP2_UL) {
1268                dc->last_ier &= ~APP2_UL;
1269                writew(dc->last_ier, dc->reg_ier);
1270                if (send_data(PORT_APP2, dc)) {
1271                        writew(APP2_UL, dc->reg_fcr);
1272                        dc->last_ier = dc->last_ier | APP2_UL;
1273                        writew(dc->last_ier, dc->reg_ier);
1274                }
1275        }
1276
1277exit_handler:
1278        spin_unlock(&dc->spin_mutex);
1279        for (a = 0; a < NOZOMI_MAX_PORTS; a++) {
1280                struct tty_struct *tty;
1281                if (test_and_clear_bit(a, &dc->flip)) {
1282                        tty = tty_port_tty_get(&dc->port[a].port);
1283                        if (tty)
1284                                tty_flip_buffer_push(tty);
1285                        tty_kref_put(tty);
1286                }
1287        }
1288        return IRQ_HANDLED;
1289none:
1290        spin_unlock(&dc->spin_mutex);
1291        return IRQ_NONE;
1292}
1293
1294static void nozomi_get_card_type(struct nozomi *dc)
1295{
1296        int i;
1297        u32 size = 0;
1298
1299        for (i = 0; i < 6; i++)
1300                size += pci_resource_len(dc->pdev, i);
1301
1302        /* Assume card type F32_8 if no match */
1303        dc->card_type = size == 2048 ? F32_2 : F32_8;
1304
1305        dev_info(&dc->pdev->dev, "Card type is: %d\n", dc->card_type);
1306}
1307
1308static void nozomi_setup_private_data(struct nozomi *dc)
1309{
1310        void __iomem *offset = dc->base_addr + dc->card_type / 2;
1311        unsigned int i;
1312
1313        dc->reg_fcr = (void __iomem *)(offset + R_FCR);
1314        dc->reg_iir = (void __iomem *)(offset + R_IIR);
1315        dc->reg_ier = (void __iomem *)(offset + R_IER);
1316        dc->last_ier = 0;
1317        dc->flip = 0;
1318
1319        dc->port[PORT_MDM].token_dl = MDM_DL;
1320        dc->port[PORT_DIAG].token_dl = DIAG_DL;
1321        dc->port[PORT_APP1].token_dl = APP1_DL;
1322        dc->port[PORT_APP2].token_dl = APP2_DL;
1323
1324        for (i = 0; i < MAX_PORT; i++)
1325                init_waitqueue_head(&dc->port[i].tty_wait);
1326}
1327
1328static ssize_t card_type_show(struct device *dev, struct device_attribute *attr,
1329                          char *buf)
1330{
1331        const struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev));
1332
1333        return sprintf(buf, "%d\n", dc->card_type);
1334}
1335static DEVICE_ATTR(card_type, S_IRUGO, card_type_show, NULL);
1336
1337static ssize_t open_ttys_show(struct device *dev, struct device_attribute *attr,
1338                          char *buf)
1339{
1340        const struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev));
1341
1342        return sprintf(buf, "%u\n", dc->open_ttys);
1343}
1344static DEVICE_ATTR(open_ttys, S_IRUGO, open_ttys_show, NULL);
1345
1346static void make_sysfs_files(struct nozomi *dc)
1347{
1348        if (device_create_file(&dc->pdev->dev, &dev_attr_card_type))
1349                dev_err(&dc->pdev->dev,
1350                        "Could not create sysfs file for card_type\n");
1351        if (device_create_file(&dc->pdev->dev, &dev_attr_open_ttys))
1352                dev_err(&dc->pdev->dev,
1353                        "Could not create sysfs file for open_ttys\n");
1354}
1355
1356static void remove_sysfs_files(struct nozomi *dc)
1357{
1358        device_remove_file(&dc->pdev->dev, &dev_attr_card_type);
1359        device_remove_file(&dc->pdev->dev, &dev_attr_open_ttys);
1360}
1361
1362/* Allocate memory for one device */
1363static int __devinit nozomi_card_init(struct pci_dev *pdev,
1364                                      const struct pci_device_id *ent)
1365{
1366        resource_size_t start;
1367        int ret;
1368        struct nozomi *dc = NULL;
1369        int ndev_idx;
1370        int i;
1371
1372        dev_dbg(&pdev->dev, "Init, new card found\n");
1373
1374        for (ndev_idx = 0; ndev_idx < ARRAY_SIZE(ndevs); ndev_idx++)
1375                if (!ndevs[ndev_idx])
1376                        break;
1377
1378        if (ndev_idx >= ARRAY_SIZE(ndevs)) {
1379                dev_err(&pdev->dev, "no free tty range for this card left\n");
1380                ret = -EIO;
1381                goto err;
1382        }
1383
1384        dc = kzalloc(sizeof(struct nozomi), GFP_KERNEL);
1385        if (unlikely(!dc)) {
1386                dev_err(&pdev->dev, "Could not allocate memory\n");
1387                ret = -ENOMEM;
1388                goto err_free;
1389        }
1390
1391        dc->pdev = pdev;
1392
1393        ret = pci_enable_device(dc->pdev);
1394        if (ret) {
1395                dev_err(&pdev->dev, "Failed to enable PCI Device\n");
1396                goto err_free;
1397        }
1398
1399        ret = pci_request_regions(dc->pdev, NOZOMI_NAME);
1400        if (ret) {
1401                dev_err(&pdev->dev, "I/O address 0x%04x already in use\n",
1402                        (int) /* nozomi_private.io_addr */ 0);
1403                goto err_disable_device;
1404        }
1405
1406        start = pci_resource_start(dc->pdev, 0);
1407        if (start == 0) {
1408                dev_err(&pdev->dev, "No I/O address for card detected\n");
1409                ret = -ENODEV;
1410                goto err_rel_regs;
1411        }
1412
1413        /* Find out what card type it is */
1414        nozomi_get_card_type(dc);
1415
1416        dc->base_addr = ioremap_nocache(start, dc->card_type);
1417        if (!dc->base_addr) {
1418                dev_err(&pdev->dev, "Unable to map card MMIO\n");
1419                ret = -ENODEV;
1420                goto err_rel_regs;
1421        }
1422
1423        dc->send_buf = kmalloc(SEND_BUF_MAX, GFP_KERNEL);
1424        if (!dc->send_buf) {
1425                dev_err(&pdev->dev, "Could not allocate send buffer?\n");
1426                ret = -ENOMEM;
1427                goto err_free_sbuf;
1428        }
1429
1430        for (i = PORT_MDM; i < MAX_PORT; i++) {
1431                if (kfifo_alloc(&dc->port[i].fifo_ul, FIFO_BUFFER_SIZE_UL,
1432                                        GFP_KERNEL)) {
1433                        dev_err(&pdev->dev,
1434                                        "Could not allocate kfifo buffer\n");
1435                        ret = -ENOMEM;
1436                        goto err_free_kfifo;
1437                }
1438        }
1439
1440        spin_lock_init(&dc->spin_mutex);
1441
1442        nozomi_setup_private_data(dc);
1443
1444        /* Disable all interrupts */
1445        dc->last_ier = 0;
1446        writew(dc->last_ier, dc->reg_ier);
1447
1448        ret = request_irq(pdev->irq, &interrupt_handler, IRQF_SHARED,
1449                        NOZOMI_NAME, dc);
1450        if (unlikely(ret)) {
1451                dev_err(&pdev->dev, "can't request irq %d\n", pdev->irq);
1452                goto err_free_kfifo;
1453        }
1454
1455        DBG1("base_addr: %p", dc->base_addr);
1456
1457        make_sysfs_files(dc);
1458
1459        dc->index_start = ndev_idx * MAX_PORT;
1460        ndevs[ndev_idx] = dc;
1461
1462        pci_set_drvdata(pdev, dc);
1463
1464        /* Enable RESET interrupt */
1465        dc->last_ier = RESET;
1466        iowrite16(dc->last_ier, dc->reg_ier);
1467
1468        dc->state = NOZOMI_STATE_ENABLED;
1469
1470        for (i = 0; i < MAX_PORT; i++) {
1471                struct device *tty_dev;
1472                struct port *port = &dc->port[i];
1473                port->dc = dc;
1474                tty_port_init(&port->port);
1475                port->port.ops = &noz_tty_port_ops;
1476                tty_dev = tty_register_device(ntty_driver, dc->index_start + i,
1477                                                        &pdev->dev);
1478
1479                if (IS_ERR(tty_dev)) {
1480                        ret = PTR_ERR(tty_dev);
1481                        dev_err(&pdev->dev, "Could not allocate tty?\n");
1482                        goto err_free_tty;
1483                }
1484        }
1485
1486        return 0;
1487
1488err_free_tty:
1489        for (i = dc->index_start; i < dc->index_start + MAX_PORT; ++i)
1490                tty_unregister_device(ntty_driver, i);
1491err_free_kfifo:
1492        for (i = 0; i < MAX_PORT; i++)
1493                kfifo_free(&dc->port[i].fifo_ul);
1494err_free_sbuf:
1495        kfree(dc->send_buf);
1496        iounmap(dc->base_addr);
1497err_rel_regs:
1498        pci_release_regions(pdev);
1499err_disable_device:
1500        pci_disable_device(pdev);
1501err_free:
1502        kfree(dc);
1503err:
1504        return ret;
1505}
1506
1507static void __devexit tty_exit(struct nozomi *dc)
1508{
1509        unsigned int i;
1510
1511        DBG1(" ");
1512
1513        for (i = 0; i < MAX_PORT; ++i) {
1514                struct tty_struct *tty = tty_port_tty_get(&dc->port[i].port);
1515                if (tty && list_empty(&tty->hangup_work.entry))
1516                        tty_hangup(tty);
1517                tty_kref_put(tty);
1518        }
1519        /* Racy below - surely should wait for scheduled work to be done or
1520           complete off a hangup method ? */
1521        while (dc->open_ttys)
1522                msleep(1);
1523        for (i = dc->index_start; i < dc->index_start + MAX_PORT; ++i)
1524                tty_unregister_device(ntty_driver, i);
1525}
1526
1527/* Deallocate memory for one device */
1528static void __devexit nozomi_card_exit(struct pci_dev *pdev)
1529{
1530        int i;
1531        struct ctrl_ul ctrl;
1532        struct nozomi *dc = pci_get_drvdata(pdev);
1533
1534        /* Disable all interrupts */
1535        dc->last_ier = 0;
1536        writew(dc->last_ier, dc->reg_ier);
1537
1538        tty_exit(dc);
1539
1540        /* Send 0x0001, command card to resend the reset token.  */
1541        /* This is to get the reset when the module is reloaded. */
1542        ctrl.port = 0x00;
1543        ctrl.reserved = 0;
1544        ctrl.RTS = 0;
1545        ctrl.DTR = 1;
1546        DBG1("sending flow control 0x%04X", *((u16 *)&ctrl));
1547
1548        /* Setup dc->reg addresses to we can use defines here */
1549        write_mem32(dc->port[PORT_CTRL].ul_addr[0], (u32 *)&ctrl, 2);
1550        writew(CTRL_UL, dc->reg_fcr);   /* push the token to the card. */
1551
1552        remove_sysfs_files(dc);
1553
1554        free_irq(pdev->irq, dc);
1555
1556        for (i = 0; i < MAX_PORT; i++)
1557                kfifo_free(&dc->port[i].fifo_ul);
1558
1559        kfree(dc->send_buf);
1560
1561        iounmap(dc->base_addr);
1562
1563        pci_release_regions(pdev);
1564
1565        pci_disable_device(pdev);
1566
1567        ndevs[dc->index_start / MAX_PORT] = NULL;
1568
1569        kfree(dc);
1570}
1571
1572static void set_rts(const struct tty_struct *tty, int rts)
1573{
1574        struct port *port = get_port_by_tty(tty);
1575
1576        port->ctrl_ul.RTS = rts;
1577        port->update_flow_control = 1;
1578        enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty));
1579}
1580
1581static void set_dtr(const struct tty_struct *tty, int dtr)
1582{
1583        struct port *port = get_port_by_tty(tty);
1584
1585        DBG1("SETTING DTR index: %d, dtr: %d", tty->index, dtr);
1586
1587        port->ctrl_ul.DTR = dtr;
1588        port->update_flow_control = 1;
1589        enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty));
1590}
1591
1592/*
1593 * ----------------------------------------------------------------------------
1594 * TTY code
1595 * ----------------------------------------------------------------------------
1596 */
1597
1598static int ntty_install(struct tty_driver *driver, struct tty_struct *tty)
1599{
1600        struct port *port = get_port_by_tty(tty);
1601        struct nozomi *dc = get_dc_by_tty(tty);
1602        int ret;
1603        if (!port || !dc || dc->state != NOZOMI_STATE_READY)
1604                return -ENODEV;
1605        ret = tty_standard_install(driver, tty);
1606        if (ret == 0)
1607                tty->driver_data = port;
1608        return ret;
1609}
1610
1611static void ntty_cleanup(struct tty_struct *tty)
1612{
1613        tty->driver_data = NULL;
1614}
1615
1616static int ntty_activate(struct tty_port *tport, struct tty_struct *tty)
1617{
1618        struct port *port = container_of(tport, struct port, port);
1619        struct nozomi *dc = port->dc;
1620        unsigned long flags;
1621
1622        DBG1("open: %d", port->token_dl);
1623        spin_lock_irqsave(&dc->spin_mutex, flags);
1624        dc->last_ier = dc->last_ier | port->token_dl;
1625        writew(dc->last_ier, dc->reg_ier);
1626        dc->open_ttys++;
1627        spin_unlock_irqrestore(&dc->spin_mutex, flags);
1628        printk("noz: activated %d: %p\n", tty->index, tport);
1629        return 0;
1630}
1631
1632static int ntty_open(struct tty_struct *tty, struct file *filp)
1633{
1634        struct port *port = tty->driver_data;
1635        return tty_port_open(&port->port, tty, filp);
1636}
1637
1638static void ntty_shutdown(struct tty_port *tport)
1639{
1640        struct port *port = container_of(tport, struct port, port);
1641        struct nozomi *dc = port->dc;
1642        unsigned long flags;
1643
1644        DBG1("close: %d", port->token_dl);
1645        spin_lock_irqsave(&dc->spin_mutex, flags);
1646        dc->last_ier &= ~(port->token_dl);
1647        writew(dc->last_ier, dc->reg_ier);
1648        dc->open_ttys--;
1649        spin_unlock_irqrestore(&dc->spin_mutex, flags);
1650        printk("noz: shutdown %p\n", tport);
1651}
1652
1653static void ntty_close(struct tty_struct *tty, struct file *filp)
1654{
1655        struct port *port = tty->driver_data;
1656        if (port)
1657                tty_port_close(&port->port, tty, filp);
1658}
1659
1660static void ntty_hangup(struct tty_struct *tty)
1661{
1662        struct port *port = tty->driver_data;
1663        tty_port_hangup(&port->port);
1664}
1665
1666/*
1667 * called when the userspace process writes to the tty (/dev/noz*).
1668 * Data is inserted into a fifo, which is then read and transferred to the modem.
1669 */
1670static int ntty_write(struct tty_struct *tty, const unsigned char *buffer,
1671                      int count)
1672{
1673        int rval = -EINVAL;
1674        struct nozomi *dc = get_dc_by_tty(tty);
1675        struct port *port = tty->driver_data;
1676        unsigned long flags;
1677
1678        /* DBG1( "WRITEx: %d, index = %d", count, index); */
1679
1680        if (!dc || !port)
1681                return -ENODEV;
1682
1683        rval = kfifo_in(&port->fifo_ul, (unsigned char *)buffer, count);
1684
1685        /* notify card */
1686        if (unlikely(dc == NULL)) {
1687                DBG1("No device context?");
1688                goto exit;
1689        }
1690
1691        spin_lock_irqsave(&dc->spin_mutex, flags);
1692        /* CTS is only valid on the modem channel */
1693        if (port == &(dc->port[PORT_MDM])) {
1694                if (port->ctrl_dl.CTS) {
1695                        DBG4("Enable interrupt");
1696                        enable_transmit_ul(tty->index % MAX_PORT, dc);
1697                } else {
1698                        dev_err(&dc->pdev->dev,
1699                                "CTS not active on modem port?\n");
1700                }
1701        } else {
1702                enable_transmit_ul(tty->index % MAX_PORT, dc);
1703        }
1704        spin_unlock_irqrestore(&dc->spin_mutex, flags);
1705
1706exit:
1707        return rval;
1708}
1709
1710/*
1711 * Calculate how much is left in device
1712 * This method is called by the upper tty layer.
1713 *   #according to sources N_TTY.c it expects a value >= 0 and
1714 *    does not check for negative values.
1715 *
1716 * If the port is unplugged report lots of room and let the bits
1717 * dribble away so we don't block anything.
1718 */
1719static int ntty_write_room(struct tty_struct *tty)
1720{
1721        struct port *port = tty->driver_data;
1722        int room = 4096;
1723        const struct nozomi *dc = get_dc_by_tty(tty);
1724
1725        if (dc)
1726                room = kfifo_avail(&port->fifo_ul);
1727
1728        return room;
1729}
1730
1731/* Gets io control parameters */
1732static int ntty_tiocmget(struct tty_struct *tty)
1733{
1734        const struct port *port = tty->driver_data;
1735        const struct ctrl_dl *ctrl_dl = &port->ctrl_dl;
1736        const struct ctrl_ul *ctrl_ul = &port->ctrl_ul;
1737
1738        /* Note: these could change under us but it is not clear this
1739           matters if so */
1740        return  (ctrl_ul->RTS ? TIOCM_RTS : 0) |
1741                (ctrl_ul->DTR ? TIOCM_DTR : 0) |
1742                (ctrl_dl->DCD ? TIOCM_CAR : 0) |
1743                (ctrl_dl->RI  ? TIOCM_RNG : 0) |
1744                (ctrl_dl->DSR ? TIOCM_DSR : 0) |
1745                (ctrl_dl->CTS ? TIOCM_CTS : 0);
1746}
1747
1748/* Sets io controls parameters */
1749static int ntty_tiocmset(struct tty_struct *tty,
1750                                        unsigned int set, unsigned int clear)
1751{
1752        struct nozomi *dc = get_dc_by_tty(tty);
1753        unsigned long flags;
1754
1755        spin_lock_irqsave(&dc->spin_mutex, flags);
1756        if (set & TIOCM_RTS)
1757                set_rts(tty, 1);
1758        else if (clear & TIOCM_RTS)
1759                set_rts(tty, 0);
1760
1761        if (set & TIOCM_DTR)
1762                set_dtr(tty, 1);
1763        else if (clear & TIOCM_DTR)
1764                set_dtr(tty, 0);
1765        spin_unlock_irqrestore(&dc->spin_mutex, flags);
1766
1767        return 0;
1768}
1769
1770static int ntty_cflags_changed(struct port *port, unsigned long flags,
1771                struct async_icount *cprev)
1772{
1773        const struct async_icount cnow = port->tty_icount;
1774        int ret;
1775
1776        ret =   ((flags & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
1777                ((flags & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
1778                ((flags & TIOCM_CD)  && (cnow.dcd != cprev->dcd)) ||
1779                ((flags & TIOCM_CTS) && (cnow.cts != cprev->cts));
1780
1781        *cprev = cnow;
1782
1783        return ret;
1784}
1785
1786static int ntty_tiocgicount(struct tty_struct *tty,
1787                                struct serial_icounter_struct *icount)
1788{
1789        struct port *port = tty->driver_data;
1790        const struct async_icount cnow = port->tty_icount;
1791
1792        icount->cts = cnow.cts;
1793        icount->dsr = cnow.dsr;
1794        icount->rng = cnow.rng;
1795        icount->dcd = cnow.dcd;
1796        icount->rx = cnow.rx;
1797        icount->tx = cnow.tx;
1798        icount->frame = cnow.frame;
1799        icount->overrun = cnow.overrun;
1800        icount->parity = cnow.parity;
1801        icount->brk = cnow.brk;
1802        icount->buf_overrun = cnow.buf_overrun;
1803        return 0;
1804}
1805
1806static int ntty_ioctl(struct tty_struct *tty,
1807                      unsigned int cmd, unsigned long arg)
1808{
1809        struct port *port = tty->driver_data;
1810        int rval = -ENOIOCTLCMD;
1811
1812        DBG1("******** IOCTL, cmd: %d", cmd);
1813
1814        switch (cmd) {
1815        case TIOCMIWAIT: {
1816                struct async_icount cprev = port->tty_icount;
1817
1818                rval = wait_event_interruptible(port->tty_wait,
1819                                ntty_cflags_changed(port, arg, &cprev));
1820                break;
1821        }
1822        default:
1823                DBG1("ERR: 0x%08X, %d", cmd, cmd);
1824                break;
1825        };
1826
1827        return rval;
1828}
1829
1830/*
1831 * Called by the upper tty layer when tty buffers are ready
1832 * to receive data again after a call to throttle.
1833 */
1834static void ntty_unthrottle(struct tty_struct *tty)
1835{
1836        struct nozomi *dc = get_dc_by_tty(tty);
1837        unsigned long flags;
1838
1839        DBG1("UNTHROTTLE");
1840        spin_lock_irqsave(&dc->spin_mutex, flags);
1841        enable_transmit_dl(tty->index % MAX_PORT, dc);
1842        set_rts(tty, 1);
1843
1844        spin_unlock_irqrestore(&dc->spin_mutex, flags);
1845}
1846
1847/*
1848 * Called by the upper tty layer when the tty buffers are almost full.
1849 * The driver should stop send more data.
1850 */
1851static void ntty_throttle(struct tty_struct *tty)
1852{
1853        struct nozomi *dc = get_dc_by_tty(tty);
1854        unsigned long flags;
1855
1856        DBG1("THROTTLE");
1857        spin_lock_irqsave(&dc->spin_mutex, flags);
1858        set_rts(tty, 0);
1859        spin_unlock_irqrestore(&dc->spin_mutex, flags);
1860}
1861
1862/* Returns number of chars in buffer, called by tty layer */
1863static s32 ntty_chars_in_buffer(struct tty_struct *tty)
1864{
1865        struct port *port = tty->driver_data;
1866        struct nozomi *dc = get_dc_by_tty(tty);
1867        s32 rval = 0;
1868
1869        if (unlikely(!dc || !port)) {
1870                goto exit_in_buffer;
1871        }
1872
1873        rval = kfifo_len(&port->fifo_ul);
1874
1875exit_in_buffer:
1876        return rval;
1877}
1878
1879static const struct tty_port_operations noz_tty_port_ops = {
1880        .activate = ntty_activate,
1881        .shutdown = ntty_shutdown,
1882};
1883
1884static const struct tty_operations tty_ops = {
1885        .ioctl = ntty_ioctl,
1886        .open = ntty_open,
1887        .close = ntty_close,
1888        .hangup = ntty_hangup,
1889        .write = ntty_write,
1890        .write_room = ntty_write_room,
1891        .unthrottle = ntty_unthrottle,
1892        .throttle = ntty_throttle,
1893        .chars_in_buffer = ntty_chars_in_buffer,
1894        .tiocmget = ntty_tiocmget,
1895        .tiocmset = ntty_tiocmset,
1896        .get_icount = ntty_tiocgicount,
1897        .install = ntty_install,
1898        .cleanup = ntty_cleanup,
1899};
1900
1901/* Module initialization */
1902static struct pci_driver nozomi_driver = {
1903        .name = NOZOMI_NAME,
1904        .id_table = nozomi_pci_tbl,
1905        .probe = nozomi_card_init,
1906        .remove = __devexit_p(nozomi_card_exit),
1907};
1908
1909static __init int nozomi_init(void)
1910{
1911        int ret;
1912
1913        printk(KERN_INFO "Initializing %s\n", VERSION_STRING);
1914
1915        ntty_driver = alloc_tty_driver(NTTY_TTY_MAXMINORS);
1916        if (!ntty_driver)
1917                return -ENOMEM;
1918
1919        ntty_driver->driver_name = NOZOMI_NAME_TTY;
1920        ntty_driver->name = "noz";
1921        ntty_driver->major = 0;
1922        ntty_driver->type = TTY_DRIVER_TYPE_SERIAL;
1923        ntty_driver->subtype = SERIAL_TYPE_NORMAL;
1924        ntty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1925        ntty_driver->init_termios = tty_std_termios;
1926        ntty_driver->init_termios.c_cflag = B115200 | CS8 | CREAD | \
1927                                                HUPCL | CLOCAL;
1928        ntty_driver->init_termios.c_ispeed = 115200;
1929        ntty_driver->init_termios.c_ospeed = 115200;
1930        tty_set_operations(ntty_driver, &tty_ops);
1931
1932        ret = tty_register_driver(ntty_driver);
1933        if (ret) {
1934                printk(KERN_ERR "Nozomi: failed to register ntty driver\n");
1935                goto free_tty;
1936        }
1937
1938        ret = pci_register_driver(&nozomi_driver);
1939        if (ret) {
1940                printk(KERN_ERR "Nozomi: can't register pci driver\n");
1941                goto unr_tty;
1942        }
1943
1944        return 0;
1945unr_tty:
1946        tty_unregister_driver(ntty_driver);
1947free_tty:
1948        put_tty_driver(ntty_driver);
1949        return ret;
1950}
1951
1952static __exit void nozomi_exit(void)
1953{
1954        printk(KERN_INFO "Unloading %s\n", DRIVER_DESC);
1955        pci_unregister_driver(&nozomi_driver);
1956        tty_unregister_driver(ntty_driver);
1957        put_tty_driver(ntty_driver);
1958}
1959
1960module_init(nozomi_init);
1961module_exit(nozomi_exit);
1962
1963module_param(debug, int, S_IRUGO | S_IWUSR);
1964
1965MODULE_LICENSE("Dual BSD/GPL");
1966MODULE_DESCRIPTION(DRIVER_DESC);
1967
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