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[] = {
 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        read_mem32((u32 *) &size, addr, 4);
 831        /*  DBG1( "%d bytes port: %d", size, index); */
 832
 833        if (tty && test_bit(TTY_THROTTLED, &tty->flags)) {
 834                DBG1("No room in tty, don't read data, don't ack interrupt, "
 835                        "disable interrupt");
 836
 837                /* disable interrupt in downlink... */
 838                disable_transmit_dl(index, dc);
 839                ret = 0;
 840                goto put;
 841        }
 842
 843        if (unlikely(size == 0)) {
 844                dev_err(&dc->pdev->dev, "size == 0?\n");
 845                ret = 1;
 846                goto put;
 847        }
 848
 849        while (size > 0) {
 850                read_mem32((u32 *) buf, addr + offset, RECEIVE_BUF_MAX);
 851
 852                if (size == 1) {
 853                        tty_insert_flip_char(&port->port, buf[0], TTY_NORMAL);
 854                        size = 0;
 855                } else if (size < RECEIVE_BUF_MAX) {
 856                        size -= tty_insert_flip_string(&port->port,
 857                                        (char *)buf, size);
 858                } else {
 859                        i = tty_insert_flip_string(&port->port,
 860                                        (char *)buf, RECEIVE_BUF_MAX);
 861                        size -= i;
 862                        offset += i;
 863                }
 864        }
 865
 866        set_bit(index, &dc->flip);
 867        ret = 1;
 868put:
 869        tty_kref_put(tty);
 870        return ret;
 871}
 872
 873/* Debug for interrupts */
 874#ifdef DEBUG
 875static char *interrupt2str(u16 interrupt)
 876{
 877        static char buf[TMP_BUF_MAX];
 878        char *p = buf;
 879
 880        interrupt & MDM_DL1 ? p += snprintf(p, TMP_BUF_MAX, "MDM_DL1 ") : NULL;
 881        interrupt & MDM_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 882                                        "MDM_DL2 ") : NULL;
 883
 884        interrupt & MDM_UL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 885                                        "MDM_UL1 ") : NULL;
 886        interrupt & MDM_UL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 887                                        "MDM_UL2 ") : NULL;
 888
 889        interrupt & DIAG_DL1 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 890                                        "DIAG_DL1 ") : NULL;
 891        interrupt & DIAG_DL2 ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 892                                        "DIAG_DL2 ") : NULL;
 893
 894        interrupt & DIAG_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 895                                        "DIAG_UL ") : NULL;
 896
 897        interrupt & APP1_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 898                                        "APP1_DL ") : NULL;
 899        interrupt & APP2_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 900                                        "APP2_DL ") : NULL;
 901
 902        interrupt & APP1_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 903                                        "APP1_UL ") : NULL;
 904        interrupt & APP2_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 905                                        "APP2_UL ") : NULL;
 906
 907        interrupt & CTRL_DL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 908                                        "CTRL_DL ") : NULL;
 909        interrupt & CTRL_UL ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 910                                        "CTRL_UL ") : NULL;
 911
 912        interrupt & RESET ? p += snprintf(p, TMP_BUF_MAX - (p - buf),
 913                                        "RESET ") : NULL;
 914
 915        return buf;
 916}
 917#endif
 918
 919/*
 920 * Receive flow control
 921 * Return 1 - If ok, else 0
 922 */
 923static int receive_flow_control(struct nozomi *dc)
 924{
 925        enum port_type port = PORT_MDM;
 926        struct ctrl_dl ctrl_dl;
 927        struct ctrl_dl old_ctrl;
 928        u16 enable_ier = 0;
 929
 930        read_mem32((u32 *) &ctrl_dl, dc->port[PORT_CTRL].dl_addr[CH_A], 2);
 931
 932        switch (ctrl_dl.port) {
 933        case CTRL_CMD:
 934                DBG1("The Base Band sends this value as a response to a "
 935                        "request for IMSI detach sent over the control "
 936                        "channel uplink (see section 7.6.1).");
 937                break;
 938        case CTRL_MDM:
 939                port = PORT_MDM;
 940                enable_ier = MDM_DL;
 941                break;
 942        case CTRL_DIAG:
 943                port = PORT_DIAG;
 944                enable_ier = DIAG_DL;
 945                break;
 946        case CTRL_APP1:
 947                port = PORT_APP1;
 948                enable_ier = APP1_DL;
 949                break;
 950        case CTRL_APP2:
 951                port = PORT_APP2;
 952                enable_ier = APP2_DL;
 953                if (dc->state == NOZOMI_STATE_ALLOCATED) {
 954                        /*
 955                         * After card initialization the flow control
 956                         * received for APP2 is always the last
 957                         */
 958                        dc->state = NOZOMI_STATE_READY;
 959                        dev_info(&dc->pdev->dev, "Device READY!\n");
 960                }
 961                break;
 962        default:
 963                dev_err(&dc->pdev->dev,
 964                        "ERROR: flow control received for non-existing port\n");
 965                return 0;
 966        };
 967
 968        DBG1("0x%04X->0x%04X", *((u16 *)&dc->port[port].ctrl_dl),
 969           *((u16 *)&ctrl_dl));
 970
 971        old_ctrl = dc->port[port].ctrl_dl;
 972        dc->port[port].ctrl_dl = ctrl_dl;
 973
 974        if (old_ctrl.CTS == 1 && ctrl_dl.CTS == 0) {
 975                DBG1("Disable interrupt (0x%04X) on port: %d",
 976                        enable_ier, port);
 977                disable_transmit_ul(port, dc);
 978
 979        } else if (old_ctrl.CTS == 0 && ctrl_dl.CTS == 1) {
 980
 981                if (kfifo_len(&dc->port[port].fifo_ul)) {
 982                        DBG1("Enable interrupt (0x%04X) on port: %d",
 983                                enable_ier, port);
 984                        DBG1("Data in buffer [%d], enable transmit! ",
 985                                kfifo_len(&dc->port[port].fifo_ul));
 986                        enable_transmit_ul(port, dc);
 987                } else {
 988                        DBG1("No data in buffer...");
 989                }
 990        }
 991
 992        if (*(u16 *)&old_ctrl == *(u16 *)&ctrl_dl) {
 993                DBG1(" No change in mctrl");
 994                return 1;
 995        }
 996        /* Update statistics */
 997        if (old_ctrl.CTS != ctrl_dl.CTS)
 998                dc->port[port].tty_icount.cts++;
 999        if (old_ctrl.DSR != ctrl_dl.DSR)
1000                dc->port[port].tty_icount.dsr++;
1001        if (old_ctrl.RI != ctrl_dl.RI)
1002                dc->port[port].tty_icount.rng++;
1003        if (old_ctrl.DCD != ctrl_dl.DCD)
1004                dc->port[port].tty_icount.dcd++;
1005
1006        wake_up_interruptible(&dc->port[port].tty_wait);
1007
1008        DBG1("port: %d DCD(%d), CTS(%d), RI(%d), DSR(%d)",
1009           port,
1010           dc->port[port].tty_icount.dcd, dc->port[port].tty_icount.cts,
1011           dc->port[port].tty_icount.rng, dc->port[port].tty_icount.dsr);
1012
1013        return 1;
1014}
1015
1016static enum ctrl_port_type port2ctrl(enum port_type port,
1017                                        const struct nozomi *dc)
1018{
1019        switch (port) {
1020        case PORT_MDM:
1021                return CTRL_MDM;
1022        case PORT_DIAG:
1023                return CTRL_DIAG;
1024        case PORT_APP1:
1025                return CTRL_APP1;
1026        case PORT_APP2:
1027                return CTRL_APP2;
1028        default:
1029                dev_err(&dc->pdev->dev,
1030                        "ERROR: send flow control " \
1031                        "received for non-existing port\n");
1032        };
1033        return CTRL_ERROR;
1034}
1035
1036/*
1037 * Send flow control, can only update one channel at a time
1038 * Return 0 - If we have updated all flow control
1039 * Return 1 - If we need to update more flow control, ack current enable more
1040 */
1041static int send_flow_control(struct nozomi *dc)
1042{
1043        u32 i, more_flow_control_to_be_updated = 0;
1044        u16 *ctrl;
1045
1046        for (i = PORT_MDM; i < MAX_PORT; i++) {
1047                if (dc->port[i].update_flow_control) {
1048                        if (more_flow_control_to_be_updated) {
1049                                /* We have more flow control to be updated */
1050                                return 1;
1051                        }
1052                        dc->port[i].ctrl_ul.port = port2ctrl(i, dc);
1053                        ctrl = (u16 *)&dc->port[i].ctrl_ul;
1054                        write_mem32(dc->port[PORT_CTRL].ul_addr[0], \
1055                                (u32 *) ctrl, 2);
1056                        dc->port[i].update_flow_control = 0;
1057                        more_flow_control_to_be_updated = 1;
1058                }
1059        }
1060        return 0;
1061}
1062
1063/*
1064 * Handle downlink data, ports that are handled are modem and diagnostics
1065 * Return 1 - ok
1066 * Return 0 - toggle fields are out of sync
1067 */
1068static int handle_data_dl(struct nozomi *dc, enum port_type port, u8 *toggle,
1069                        u16 read_iir, u16 mask1, u16 mask2)
1070{
1071        if (*toggle == 0 && read_iir & mask1) {
1072                if (receive_data(port, dc)) {
1073                        writew(mask1, dc->reg_fcr);
1074                        *toggle = !(*toggle);
1075                }
1076
1077                if (read_iir & mask2) {
1078                        if (receive_data(port, dc)) {
1079                                writew(mask2, dc->reg_fcr);
1080                                *toggle = !(*toggle);
1081                        }
1082                }
1083        } else if (*toggle == 1 && read_iir & mask2) {
1084                if (receive_data(port, dc)) {
1085                        writew(mask2, dc->reg_fcr);
1086                        *toggle = !(*toggle);
1087                }
1088
1089                if (read_iir & mask1) {
1090                        if (receive_data(port, dc)) {
1091                                writew(mask1, dc->reg_fcr);
1092                                *toggle = !(*toggle);
1093                        }
1094                }
1095        } else {
1096                dev_err(&dc->pdev->dev, "port out of sync!, toggle:%d\n",
1097                        *toggle);
1098                return 0;
1099        }
1100        return 1;
1101}
1102
1103/*
1104 * Handle uplink data, this is currently for the modem port
1105 * Return 1 - ok
1106 * Return 0 - toggle field are out of sync
1107 */
1108static int handle_data_ul(struct nozomi *dc, enum port_type port, u16 read_iir)
1109{
1110        u8 *toggle = &(dc->port[port].toggle_ul);
1111
1112        if (*toggle == 0 && read_iir & MDM_UL1) {
1113                dc->last_ier &= ~MDM_UL;
1114                writew(dc->last_ier, dc->reg_ier);
1115                if (send_data(port, dc)) {
1116                        writew(MDM_UL1, dc->reg_fcr);
1117                        dc->last_ier = dc->last_ier | MDM_UL;
1118                        writew(dc->last_ier, dc->reg_ier);
1119                        *toggle = !*toggle;
1120                }
1121
1122                if (read_iir & MDM_UL2) {
1123                        dc->last_ier &= ~MDM_UL;
1124                        writew(dc->last_ier, dc->reg_ier);
1125                        if (send_data(port, dc)) {
1126                                writew(MDM_UL2, dc->reg_fcr);
1127                                dc->last_ier = dc->last_ier | MDM_UL;
1128                                writew(dc->last_ier, dc->reg_ier);
1129                                *toggle = !*toggle;
1130                        }
1131                }
1132
1133        } else if (*toggle == 1 && read_iir & MDM_UL2) {
1134                dc->last_ier &= ~MDM_UL;
1135                writew(dc->last_ier, dc->reg_ier);
1136                if (send_data(port, dc)) {
1137                        writew(MDM_UL2, dc->reg_fcr);
1138                        dc->last_ier = dc->last_ier | MDM_UL;
1139                        writew(dc->last_ier, dc->reg_ier);
1140                        *toggle = !*toggle;
1141                }
1142
1143                if (read_iir & MDM_UL1) {
1144                        dc->last_ier &= ~MDM_UL;
1145                        writew(dc->last_ier, dc->reg_ier);
1146                        if (send_data(port, dc)) {
1147                                writew(MDM_UL1, dc->reg_fcr);
1148                                dc->last_ier = dc->last_ier | MDM_UL;
1149                                writew(dc->last_ier, dc->reg_ier);
1150                                *toggle = !*toggle;
1151                        }
1152                }
1153        } else {
1154                writew(read_iir & MDM_UL, dc->reg_fcr);
1155                dev_err(&dc->pdev->dev, "port out of sync!\n");
1156                return 0;
1157        }
1158        return 1;
1159}
1160
1161static irqreturn_t interrupt_handler(int irq, void *dev_id)
1162{
1163        struct nozomi *dc = dev_id;
1164        unsigned int a;
1165        u16 read_iir;
1166
1167        if (!dc)
1168                return IRQ_NONE;
1169
1170        spin_lock(&dc->spin_mutex);
1171        read_iir = readw(dc->reg_iir);
1172
1173        /* Card removed */
1174        if (read_iir == (u16)-1)
1175                goto none;
1176        /*
1177         * Just handle interrupt enabled in IER
1178         * (by masking with dc->last_ier)
1179         */
1180        read_iir &= dc->last_ier;
1181
1182        if (read_iir == 0)
1183                goto none;
1184
1185
1186        DBG4("%s irq:0x%04X, prev:0x%04X", interrupt2str(read_iir), read_iir,
1187                dc->last_ier);
1188
1189        if (read_iir & RESET) {
1190                if (unlikely(!nozomi_read_config_table(dc))) {
1191                        dc->last_ier = 0x0;
1192                        writew(dc->last_ier, dc->reg_ier);
1193                        dev_err(&dc->pdev->dev, "Could not read status from "
1194                                "card, we should disable interface\n");
1195                } else {
1196                        writew(RESET, dc->reg_fcr);
1197                }
1198                /* No more useful info if this was the reset interrupt. */
1199                goto exit_handler;
1200        }
1201        if (read_iir & CTRL_UL) {
1202                DBG1("CTRL_UL");
1203                dc->last_ier &= ~CTRL_UL;
1204                writew(dc->last_ier, dc->reg_ier);
1205                if (send_flow_control(dc)) {
1206                        writew(CTRL_UL, dc->reg_fcr);
1207                        dc->last_ier = dc->last_ier | CTRL_UL;
1208                        writew(dc->last_ier, dc->reg_ier);
1209                }
1210        }
1211        if (read_iir & CTRL_DL) {
1212                receive_flow_control(dc);
1213                writew(CTRL_DL, dc->reg_fcr);
1214        }
1215        if (read_iir & MDM_DL) {
1216                if (!handle_data_dl(dc, PORT_MDM,
1217                                &(dc->port[PORT_MDM].toggle_dl), read_iir,
1218                                MDM_DL1, MDM_DL2)) {
1219                        dev_err(&dc->pdev->dev, "MDM_DL out of sync!\n");
1220                        goto exit_handler;
1221                }
1222        }
1223        if (read_iir & MDM_UL) {
1224                if (!handle_data_ul(dc, PORT_MDM, read_iir)) {
1225                        dev_err(&dc->pdev->dev, "MDM_UL out of sync!\n");
1226                        goto exit_handler;
1227                }
1228        }
1229        if (read_iir & DIAG_DL) {
1230                if (!handle_data_dl(dc, PORT_DIAG,
1231                                &(dc->port[PORT_DIAG].toggle_dl), read_iir,
1232                                DIAG_DL1, DIAG_DL2)) {
1233                        dev_err(&dc->pdev->dev, "DIAG_DL out of sync!\n");
1234                        goto exit_handler;
1235                }
1236        }
1237        if (read_iir & DIAG_UL) {
1238                dc->last_ier &= ~DIAG_UL;
1239                writew(dc->last_ier, dc->reg_ier);
1240                if (send_data(PORT_DIAG, dc)) {
1241                        writew(DIAG_UL, dc->reg_fcr);
1242                        dc->last_ier = dc->last_ier | DIAG_UL;
1243                        writew(dc->last_ier, dc->reg_ier);
1244                }
1245        }
1246        if (read_iir & APP1_DL) {
1247                if (receive_data(PORT_APP1, dc))
1248                        writew(APP1_DL, dc->reg_fcr);
1249        }
1250        if (read_iir & APP1_UL) {
1251                dc->last_ier &= ~APP1_UL;
1252                writew(dc->last_ier, dc->reg_ier);
1253                if (send_data(PORT_APP1, dc)) {
1254                        writew(APP1_UL, dc->reg_fcr);
1255                        dc->last_ier = dc->last_ier | APP1_UL;
1256                        writew(dc->last_ier, dc->reg_ier);
1257                }
1258        }
1259        if (read_iir & APP2_DL) {
1260                if (receive_data(PORT_APP2, dc))
1261                        writew(APP2_DL, dc->reg_fcr);
1262        }
1263        if (read_iir & APP2_UL) {
1264                dc->last_ier &= ~APP2_UL;
1265                writew(dc->last_ier, dc->reg_ier);
1266                if (send_data(PORT_APP2, dc)) {
1267                        writew(APP2_UL, dc->reg_fcr);
1268                        dc->last_ier = dc->last_ier | APP2_UL;
1269                        writew(dc->last_ier, dc->reg_ier);
1270                }
1271        }
1272
1273exit_handler:
1274        spin_unlock(&dc->spin_mutex);
1275
1276        for (a = 0; a < NOZOMI_MAX_PORTS; a++)
1277                if (test_and_clear_bit(a, &dc->flip))
1278                        tty_flip_buffer_push(&dc->port[a].port);
1279
1280        return IRQ_HANDLED;
1281none:
1282        spin_unlock(&dc->spin_mutex);
1283        return IRQ_NONE;
1284}
1285
1286static void nozomi_get_card_type(struct nozomi *dc)
1287{
1288        int i;
1289        u32 size = 0;
1290
1291        for (i = 0; i < 6; i++)
1292                size += pci_resource_len(dc->pdev, i);
1293
1294        /* Assume card type F32_8 if no match */
1295        dc->card_type = size == 2048 ? F32_2 : F32_8;
1296
1297        dev_info(&dc->pdev->dev, "Card type is: %d\n", dc->card_type);
1298}
1299
1300static void nozomi_setup_private_data(struct nozomi *dc)
1301{
1302        void __iomem *offset = dc->base_addr + dc->card_type / 2;
1303        unsigned int i;
1304
1305        dc->reg_fcr = (void __iomem *)(offset + R_FCR);
1306        dc->reg_iir = (void __iomem *)(offset + R_IIR);
1307        dc->reg_ier = (void __iomem *)(offset + R_IER);
1308        dc->last_ier = 0;
1309        dc->flip = 0;
1310
1311        dc->port[PORT_MDM].token_dl = MDM_DL;
1312        dc->port[PORT_DIAG].token_dl = DIAG_DL;
1313        dc->port[PORT_APP1].token_dl = APP1_DL;
1314        dc->port[PORT_APP2].token_dl = APP2_DL;
1315
1316        for (i = 0; i < MAX_PORT; i++)
1317                init_waitqueue_head(&dc->port[i].tty_wait);
1318}
1319
1320static ssize_t card_type_show(struct device *dev, struct device_attribute *attr,
1321                          char *buf)
1322{
1323        const struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev));
1324
1325        return sprintf(buf, "%d\n", dc->card_type);
1326}
1327static DEVICE_ATTR(card_type, S_IRUGO, card_type_show, NULL);
1328
1329static ssize_t open_ttys_show(struct device *dev, struct device_attribute *attr,
1330                          char *buf)
1331{
1332        const struct nozomi *dc = pci_get_drvdata(to_pci_dev(dev));
1333
1334        return sprintf(buf, "%u\n", dc->open_ttys);
1335}
1336static DEVICE_ATTR(open_ttys, S_IRUGO, open_ttys_show, NULL);
1337
1338static void make_sysfs_files(struct nozomi *dc)
1339{
1340        if (device_create_file(&dc->pdev->dev, &dev_attr_card_type))
1341                dev_err(&dc->pdev->dev,
1342                        "Could not create sysfs file for card_type\n");
1343        if (device_create_file(&dc->pdev->dev, &dev_attr_open_ttys))
1344                dev_err(&dc->pdev->dev,
1345                        "Could not create sysfs file for open_ttys\n");
1346}
1347
1348static void remove_sysfs_files(struct nozomi *dc)
1349{
1350        device_remove_file(&dc->pdev->dev, &dev_attr_card_type);
1351        device_remove_file(&dc->pdev->dev, &dev_attr_open_ttys);
1352}
1353
1354/* Allocate memory for one device */
1355static int nozomi_card_init(struct pci_dev *pdev,
1356                                      const struct pci_device_id *ent)
1357{
1358        resource_size_t start;
1359        int ret;
1360        struct nozomi *dc = NULL;
1361        int ndev_idx;
1362        int i;
1363
1364        dev_dbg(&pdev->dev, "Init, new card found\n");
1365
1366        for (ndev_idx = 0; ndev_idx < ARRAY_SIZE(ndevs); ndev_idx++)
1367                if (!ndevs[ndev_idx])
1368                        break;
1369
1370        if (ndev_idx >= ARRAY_SIZE(ndevs)) {
1371                dev_err(&pdev->dev, "no free tty range for this card left\n");
1372                ret = -EIO;
1373                goto err;
1374        }
1375
1376        dc = kzalloc(sizeof(struct nozomi), GFP_KERNEL);
1377        if (unlikely(!dc)) {
1378                dev_err(&pdev->dev, "Could not allocate memory\n");
1379                ret = -ENOMEM;
1380                goto err_free;
1381        }
1382
1383        dc->pdev = pdev;
1384
1385        ret = pci_enable_device(dc->pdev);
1386        if (ret) {
1387                dev_err(&pdev->dev, "Failed to enable PCI Device\n");
1388                goto err_free;
1389        }
1390
1391        ret = pci_request_regions(dc->pdev, NOZOMI_NAME);
1392        if (ret) {
1393                dev_err(&pdev->dev, "I/O address 0x%04x already in use\n",
1394                        (int) /* nozomi_private.io_addr */ 0);
1395                goto err_disable_device;
1396        }
1397
1398        start = pci_resource_start(dc->pdev, 0);
1399        if (start == 0) {
1400                dev_err(&pdev->dev, "No I/O address for card detected\n");
1401                ret = -ENODEV;
1402                goto err_rel_regs;
1403        }
1404
1405        /* Find out what card type it is */
1406        nozomi_get_card_type(dc);
1407
1408        dc->base_addr = ioremap_nocache(start, dc->card_type);
1409        if (!dc->base_addr) {
1410                dev_err(&pdev->dev, "Unable to map card MMIO\n");
1411                ret = -ENODEV;
1412                goto err_rel_regs;
1413        }
1414
1415        dc->send_buf = kmalloc(SEND_BUF_MAX, GFP_KERNEL);
1416        if (!dc->send_buf) {
1417                dev_err(&pdev->dev, "Could not allocate send buffer?\n");
1418                ret = -ENOMEM;
1419                goto err_free_sbuf;
1420        }
1421
1422        for (i = PORT_MDM; i < MAX_PORT; i++) {
1423                if (kfifo_alloc(&dc->port[i].fifo_ul, FIFO_BUFFER_SIZE_UL,
1424                                        GFP_KERNEL)) {
1425                        dev_err(&pdev->dev,
1426                                        "Could not allocate kfifo buffer\n");
1427                        ret = -ENOMEM;
1428                        goto err_free_kfifo;
1429                }
1430        }
1431
1432        spin_lock_init(&dc->spin_mutex);
1433
1434        nozomi_setup_private_data(dc);
1435
1436        /* Disable all interrupts */
1437        dc->last_ier = 0;
1438        writew(dc->last_ier, dc->reg_ier);
1439
1440        ret = request_irq(pdev->irq, &interrupt_handler, IRQF_SHARED,
1441                        NOZOMI_NAME, dc);
1442        if (unlikely(ret)) {
1443                dev_err(&pdev->dev, "can't request irq %d\n", pdev->irq);
1444                goto err_free_kfifo;
1445        }
1446
1447        DBG1("base_addr: %p", dc->base_addr);
1448
1449        make_sysfs_files(dc);
1450
1451        dc->index_start = ndev_idx * MAX_PORT;
1452        ndevs[ndev_idx] = dc;
1453
1454        pci_set_drvdata(pdev, dc);
1455
1456        /* Enable RESET interrupt */
1457        dc->last_ier = RESET;
1458        iowrite16(dc->last_ier, dc->reg_ier);
1459
1460        dc->state = NOZOMI_STATE_ENABLED;
1461
1462        for (i = 0; i < MAX_PORT; i++) {
1463                struct device *tty_dev;
1464                struct port *port = &dc->port[i];
1465                port->dc = dc;
1466                tty_port_init(&port->port);
1467                port->port.ops = &noz_tty_port_ops;
1468                tty_dev = tty_port_register_device(&port->port, ntty_driver,
1469                                dc->index_start + i, &pdev->dev);
1470
1471                if (IS_ERR(tty_dev)) {
1472                        ret = PTR_ERR(tty_dev);
1473                        dev_err(&pdev->dev, "Could not allocate tty?\n");
1474                        tty_port_destroy(&port->port);
1475                        goto err_free_tty;
1476                }
1477        }
1478
1479        return 0;
1480
1481err_free_tty:
1482        for (i = 0; i < MAX_PORT; ++i) {
1483                tty_unregister_device(ntty_driver, dc->index_start + i);
1484                tty_port_destroy(&dc->port[i].port);
1485        }
1486err_free_kfifo:
1487        for (i = 0; i < MAX_PORT; i++)
1488                kfifo_free(&dc->port[i].fifo_ul);
1489err_free_sbuf:
1490        kfree(dc->send_buf);
1491        iounmap(dc->base_addr);
1492err_rel_regs:
1493        pci_release_regions(pdev);
1494err_disable_device:
1495        pci_disable_device(pdev);
1496err_free:
1497        kfree(dc);
1498err:
1499        return ret;
1500}
1501
1502static void tty_exit(struct nozomi *dc)
1503{
1504        unsigned int i;
1505
1506        DBG1(" ");
1507
1508        for (i = 0; i < MAX_PORT; ++i) {
1509                struct tty_struct *tty = tty_port_tty_get(&dc->port[i].port);
1510                if (tty && list_empty(&tty->hangup_work.entry))
1511                        tty_hangup(tty);
1512                tty_kref_put(tty);
1513        }
1514        /* Racy below - surely should wait for scheduled work to be done or
1515           complete off a hangup method ? */
1516        while (dc->open_ttys)
1517                msleep(1);
1518        for (i = 0; i < MAX_PORT; ++i) {
1519                tty_unregister_device(ntty_driver, dc->index_start + i);
1520                tty_port_destroy(&dc->port[i].port);
1521        }
1522}
1523
1524/* Deallocate memory for one device */
1525static void nozomi_card_exit(struct pci_dev *pdev)
1526{
1527        int i;
1528        struct ctrl_ul ctrl;
1529        struct nozomi *dc = pci_get_drvdata(pdev);
1530
1531        /* Disable all interrupts */
1532        dc->last_ier = 0;
1533        writew(dc->last_ier, dc->reg_ier);
1534
1535        tty_exit(dc);
1536
1537        /* Send 0x0001, command card to resend the reset token.  */
1538        /* This is to get the reset when the module is reloaded. */
1539        ctrl.port = 0x00;
1540        ctrl.reserved = 0;
1541        ctrl.RTS = 0;
1542        ctrl.DTR = 1;
1543        DBG1("sending flow control 0x%04X", *((u16 *)&ctrl));
1544
1545        /* Setup dc->reg addresses to we can use defines here */
1546        write_mem32(dc->port[PORT_CTRL].ul_addr[0], (u32 *)&ctrl, 2);
1547        writew(CTRL_UL, dc->reg_fcr);   /* push the token to the card. */
1548
1549        remove_sysfs_files(dc);
1550
1551        free_irq(pdev->irq, dc);
1552
1553        for (i = 0; i < MAX_PORT; i++)
1554                kfifo_free(&dc->port[i].fifo_ul);
1555
1556        kfree(dc->send_buf);
1557
1558        iounmap(dc->base_addr);
1559
1560        pci_release_regions(pdev);
1561
1562        pci_disable_device(pdev);
1563
1564        ndevs[dc->index_start / MAX_PORT] = NULL;
1565
1566        kfree(dc);
1567}
1568
1569static void set_rts(const struct tty_struct *tty, int rts)
1570{
1571        struct port *port = get_port_by_tty(tty);
1572
1573        port->ctrl_ul.RTS = rts;
1574        port->update_flow_control = 1;
1575        enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty));
1576}
1577
1578static void set_dtr(const struct tty_struct *tty, int dtr)
1579{
1580        struct port *port = get_port_by_tty(tty);
1581
1582        DBG1("SETTING DTR index: %d, dtr: %d", tty->index, dtr);
1583
1584        port->ctrl_ul.DTR = dtr;
1585        port->update_flow_control = 1;
1586        enable_transmit_ul(PORT_CTRL, get_dc_by_tty(tty));
1587}
1588
1589/*
1590 * ----------------------------------------------------------------------------
1591 * TTY code
1592 * ----------------------------------------------------------------------------
1593 */
1594
1595static int ntty_install(struct tty_driver *driver, struct tty_struct *tty)
1596{
1597        struct port *port = get_port_by_tty(tty);
1598        struct nozomi *dc = get_dc_by_tty(tty);
1599        int ret;
1600        if (!port || !dc || dc->state != NOZOMI_STATE_READY)
1601                return -ENODEV;
1602        ret = tty_standard_install(driver, tty);
1603        if (ret == 0)
1604                tty->driver_data = port;
1605        return ret;
1606}
1607
1608static void ntty_cleanup(struct tty_struct *tty)
1609{
1610        tty->driver_data = NULL;
1611}
1612
1613static int ntty_activate(struct tty_port *tport, struct tty_struct *tty)
1614{
1615        struct port *port = container_of(tport, struct port, port);
1616        struct nozomi *dc = port->dc;
1617        unsigned long flags;
1618
1619        DBG1("open: %d", port->token_dl);
1620        spin_lock_irqsave(&dc->spin_mutex, flags);
1621        dc->last_ier = dc->last_ier | port->token_dl;
1622        writew(dc->last_ier, dc->reg_ier);
1623        dc->open_ttys++;
1624        spin_unlock_irqrestore(&dc->spin_mutex, flags);
1625        printk("noz: activated %d: %p\n", tty->index, tport);
1626        return 0;
1627}
1628
1629static int ntty_open(struct tty_struct *tty, struct file *filp)
1630{
1631        struct port *port = tty->driver_data;
1632        return tty_port_open(&port->port, tty, filp);
1633}
1634
1635static void ntty_shutdown(struct tty_port *tport)
1636{
1637        struct port *port = container_of(tport, struct port, port);
1638        struct nozomi *dc = port->dc;
1639        unsigned long flags;
1640
1641        DBG1("close: %d", port->token_dl);
1642        spin_lock_irqsave(&dc->spin_mutex, flags);
1643        dc->last_ier &= ~(port->token_dl);
1644        writew(dc->last_ier, dc->reg_ier);
1645        dc->open_ttys--;
1646        spin_unlock_irqrestore(&dc->spin_mutex, flags);
1647        printk("noz: shutdown %p\n", tport);
1648}
1649
1650static void ntty_close(struct tty_struct *tty, struct file *filp)
1651{
1652        struct port *port = tty->driver_data;
1653        if (port)
1654                tty_port_close(&port->port, tty, filp);
1655}
1656
1657static void ntty_hangup(struct tty_struct *tty)
1658{
1659        struct port *port = tty->driver_data;
1660        tty_port_hangup(&port->port);
1661}
1662
1663/*
1664 * called when the userspace process writes to the tty (/dev/noz*).
1665 * Data is inserted into a fifo, which is then read and transferred to the modem.
1666 */
1667static int ntty_write(struct tty_struct *tty, const unsigned char *buffer,
1668                      int count)
1669{
1670        int rval = -EINVAL;
1671        struct nozomi *dc = get_dc_by_tty(tty);
1672        struct port *port = tty->driver_data;
1673        unsigned long flags;
1674
1675        /* DBG1( "WRITEx: %d, index = %d", count, index); */
1676
1677        if (!dc || !port)
1678                return -ENODEV;
1679
1680        rval = kfifo_in(&port->fifo_ul, (unsigned char *)buffer, count);
1681
1682        spin_lock_irqsave(&dc->spin_mutex, flags);
1683        /* CTS is only valid on the modem channel */
1684        if (port == &(dc->port[PORT_MDM])) {
1685                if (port->ctrl_dl.CTS) {
1686                        DBG4("Enable interrupt");
1687                        enable_transmit_ul(tty->index % MAX_PORT, dc);
1688                } else {
1689                        dev_err(&dc->pdev->dev,
1690                                "CTS not active on modem port?\n");
1691                }
1692        } else {
1693                enable_transmit_ul(tty->index % MAX_PORT, dc);
1694        }
1695        spin_unlock_irqrestore(&dc->spin_mutex, flags);
1696
1697        return rval;
1698}
1699
1700/*
1701 * Calculate how much is left in device
1702 * This method is called by the upper tty layer.
1703 *   #according to sources N_TTY.c it expects a value >= 0 and
1704 *    does not check for negative values.
1705 *
1706 * If the port is unplugged report lots of room and let the bits
1707 * dribble away so we don't block anything.
1708 */
1709static int ntty_write_room(struct tty_struct *tty)
1710{
1711        struct port *port = tty->driver_data;
1712        int room = 4096;
1713        const struct nozomi *dc = get_dc_by_tty(tty);
1714
1715        if (dc)
1716                room = kfifo_avail(&port->fifo_ul);
1717
1718        return room;
1719}
1720
1721/* Gets io control parameters */
1722static int ntty_tiocmget(struct tty_struct *tty)
1723{
1724        const struct port *port = tty->driver_data;
1725        const struct ctrl_dl *ctrl_dl = &port->ctrl_dl;
1726        const struct ctrl_ul *ctrl_ul = &port->ctrl_ul;
1727
1728        /* Note: these could change under us but it is not clear this
1729           matters if so */
1730        return  (ctrl_ul->RTS ? TIOCM_RTS : 0) |
1731                (ctrl_ul->DTR ? TIOCM_DTR : 0) |
1732                (ctrl_dl->DCD ? TIOCM_CAR : 0) |
1733                (ctrl_dl->RI  ? TIOCM_RNG : 0) |
1734                (ctrl_dl->DSR ? TIOCM_DSR : 0) |
1735                (ctrl_dl->CTS ? TIOCM_CTS : 0);
1736}
1737
1738/* Sets io controls parameters */
1739static int ntty_tiocmset(struct tty_struct *tty,
1740                                        unsigned int set, unsigned int clear)
1741{
1742        struct nozomi *dc = get_dc_by_tty(tty);
1743        unsigned long flags;
1744
1745        spin_lock_irqsave(&dc->spin_mutex, flags);
1746        if (set & TIOCM_RTS)
1747                set_rts(tty, 1);
1748        else if (clear & TIOCM_RTS)
1749                set_rts(tty, 0);
1750
1751        if (set & TIOCM_DTR)
1752                set_dtr(tty, 1);
1753        else if (clear & TIOCM_DTR)
1754                set_dtr(tty, 0);
1755        spin_unlock_irqrestore(&dc->spin_mutex, flags);
1756
1757        return 0;
1758}
1759
1760static int ntty_cflags_changed(struct port *port, unsigned long flags,
1761                struct async_icount *cprev)
1762{
1763        const struct async_icount cnow = port->tty_icount;
1764        int ret;
1765
1766        ret =   ((flags & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
1767                ((flags & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
1768                ((flags & TIOCM_CD)  && (cnow.dcd != cprev->dcd)) ||
1769                ((flags & TIOCM_CTS) && (cnow.cts != cprev->cts));
1770
1771        *cprev = cnow;
1772
1773        return ret;
1774}
1775
1776static int ntty_tiocgicount(struct tty_struct *tty,
1777                                struct serial_icounter_struct *icount)
1778{
1779        struct port *port = tty->driver_data;
1780        const struct async_icount cnow = port->tty_icount;
1781
1782        icount->cts = cnow.cts;
1783        icount->dsr = cnow.dsr;
1784        icount->rng = cnow.rng;
1785        icount->dcd = cnow.dcd;
1786        icount->rx = cnow.rx;
1787        icount->tx = cnow.tx;
1788        icount->frame = cnow.frame;
1789        icount->overrun = cnow.overrun;
1790        icount->parity = cnow.parity;
1791        icount->brk = cnow.brk;
1792        icount->buf_overrun = cnow.buf_overrun;
1793        return 0;
1794}
1795
1796static int ntty_ioctl(struct tty_struct *tty,
1797                      unsigned int cmd, unsigned long arg)
1798{
1799        struct port *port = tty->driver_data;
1800        int rval = -ENOIOCTLCMD;
1801
1802        DBG1("******** IOCTL, cmd: %d", cmd);
1803
1804        switch (cmd) {
1805        case TIOCMIWAIT: {
1806                struct async_icount cprev = port->tty_icount;
1807
1808                rval = wait_event_interruptible(port->tty_wait,
1809                                ntty_cflags_changed(port, arg, &cprev));
1810                break;
1811        }
1812        default:
1813                DBG1("ERR: 0x%08X, %d", cmd, cmd);
1814                break;
1815        };
1816
1817        return rval;
1818}
1819
1820/*
1821 * Called by the upper tty layer when tty buffers are ready
1822 * to receive data again after a call to throttle.
1823 */
1824static void ntty_unthrottle(struct tty_struct *tty)
1825{
1826        struct nozomi *dc = get_dc_by_tty(tty);
1827        unsigned long flags;
1828
1829        DBG1("UNTHROTTLE");
1830        spin_lock_irqsave(&dc->spin_mutex, flags);
1831        enable_transmit_dl(tty->index % MAX_PORT, dc);
1832        set_rts(tty, 1);
1833
1834        spin_unlock_irqrestore(&dc->spin_mutex, flags);
1835}
1836
1837/*
1838 * Called by the upper tty layer when the tty buffers are almost full.
1839 * The driver should stop send more data.
1840 */
1841static void ntty_throttle(struct tty_struct *tty)
1842{
1843        struct nozomi *dc = get_dc_by_tty(tty);
1844        unsigned long flags;
1845
1846        DBG1("THROTTLE");
1847        spin_lock_irqsave(&dc->spin_mutex, flags);
1848        set_rts(tty, 0);
1849        spin_unlock_irqrestore(&dc->spin_mutex, flags);
1850}
1851
1852/* Returns number of chars in buffer, called by tty layer */
1853static s32 ntty_chars_in_buffer(struct tty_struct *tty)
1854{
1855        struct port *port = tty->driver_data;
1856        struct nozomi *dc = get_dc_by_tty(tty);
1857        s32 rval = 0;
1858
1859        if (unlikely(!dc || !port)) {
1860                goto exit_in_buffer;
1861        }
1862
1863        rval = kfifo_len(&port->fifo_ul);
1864
1865exit_in_buffer:
1866        return rval;
1867}
1868
1869static const struct tty_port_operations noz_tty_port_ops = {
1870        .activate = ntty_activate,
1871        .shutdown = ntty_shutdown,
1872};
1873
1874static const struct tty_operations tty_ops = {
1875        .ioctl = ntty_ioctl,
1876        .open = ntty_open,
1877        .close = ntty_close,
1878        .hangup = ntty_hangup,
1879        .write = ntty_write,
1880        .write_room = ntty_write_room,
1881        .unthrottle = ntty_unthrottle,
1882        .throttle = ntty_throttle,
1883        .chars_in_buffer = ntty_chars_in_buffer,
1884        .tiocmget = ntty_tiocmget,
1885        .tiocmset = ntty_tiocmset,
1886        .get_icount = ntty_tiocgicount,
1887        .install = ntty_install,
1888        .cleanup = ntty_cleanup,
1889};
1890
1891/* Module initialization */
1892static struct pci_driver nozomi_driver = {
1893        .name = NOZOMI_NAME,
1894        .id_table = nozomi_pci_tbl,
1895        .probe = nozomi_card_init,
1896        .remove = nozomi_card_exit,
1897};
1898
1899static __init int nozomi_init(void)
1900{
1901        int ret;
1902
1903        printk(KERN_INFO "Initializing %s\n", VERSION_STRING);
1904
1905        ntty_driver = alloc_tty_driver(NTTY_TTY_MAXMINORS);
1906        if (!ntty_driver)
1907                return -ENOMEM;
1908
1909        ntty_driver->driver_name = NOZOMI_NAME_TTY;
1910        ntty_driver->name = "noz";
1911        ntty_driver->major = 0;
1912        ntty_driver->type = TTY_DRIVER_TYPE_SERIAL;
1913        ntty_driver->subtype = SERIAL_TYPE_NORMAL;
1914        ntty_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
1915        ntty_driver->init_termios = tty_std_termios;
1916        ntty_driver->init_termios.c_cflag = B115200 | CS8 | CREAD | \
1917                                                HUPCL | CLOCAL;
1918        ntty_driver->init_termios.c_ispeed = 115200;
1919        ntty_driver->init_termios.c_ospeed = 115200;
1920        tty_set_operations(ntty_driver, &tty_ops);
1921
1922        ret = tty_register_driver(ntty_driver);
1923        if (ret) {
1924                printk(KERN_ERR "Nozomi: failed to register ntty driver\n");
1925                goto free_tty;
1926        }
1927
1928        ret = pci_register_driver(&nozomi_driver);
1929        if (ret) {
1930                printk(KERN_ERR "Nozomi: can't register pci driver\n");
1931                goto unr_tty;
1932        }
1933
1934        return 0;
1935unr_tty:
1936        tty_unregister_driver(ntty_driver);
1937free_tty:
1938        put_tty_driver(ntty_driver);
1939        return ret;
1940}
1941
1942static __exit void nozomi_exit(void)
1943{
1944        printk(KERN_INFO "Unloading %s\n", DRIVER_DESC);
1945        pci_unregister_driver(&nozomi_driver);
1946        tty_unregister_driver(ntty_driver);
1947        put_tty_driver(ntty_driver);
1948}
1949
1950module_init(nozomi_init);
1951module_exit(nozomi_exit);
1952
1953module_param(debug, int, S_IRUGO | S_IWUSR);
1954
1955MODULE_LICENSE("Dual BSD/GPL");
1956MODULE_DESCRIPTION(DRIVER_DESC);
1957
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