git.oblomov.eu Git - linux-2.6/blob - drivers/memstick/host/tifm_ms.c

   1 /*
   2  *  TI FlashMedia driver
   3  *
   4  *  Copyright (C) 2007 Alex Dubov <oakad@yahoo.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * Special thanks to Carlos Corbacho for providing various MemoryStick cards
  11  * that made this driver possible.
  12  *
  13  */
  14
  15 #include <linux/tifm.h>
  16 #include <linux/memstick.h>
  17 #include <linux/highmem.h>
  18 #include <linux/scatterlist.h>
  19 #include <linux/log2.h>
  20 #include <asm/io.h>
  21
  22 #define DRIVER_NAME "tifm_ms"
  23
  24 static int no_dma;
  25 module_param(no_dma, bool, 0644);
  26
  27 /*
  28  * Some control bits of TIFM appear to conform to Sony's reference design,
  29  * so I'm just assuming they all are.
  30  */
  31
  32 #define TIFM_MS_STAT_DRQ     0x04000
  33 #define TIFM_MS_STAT_MSINT   0x02000
  34 #define TIFM_MS_STAT_RDY     0x01000
  35 #define TIFM_MS_STAT_CRC     0x00200
  36 #define TIFM_MS_STAT_TOE     0x00100
  37 #define TIFM_MS_STAT_EMP     0x00020
  38 #define TIFM_MS_STAT_FUL     0x00010
  39 #define TIFM_MS_STAT_CED     0x00008
  40 #define TIFM_MS_STAT_ERR     0x00004
  41 #define TIFM_MS_STAT_BRQ     0x00002
  42 #define TIFM_MS_STAT_CNK     0x00001
  43
  44 #define TIFM_MS_SYS_DMA      0x10000
  45 #define TIFM_MS_SYS_RESET    0x08000
  46 #define TIFM_MS_SYS_SRAC     0x04000
  47 #define TIFM_MS_SYS_INTEN    0x02000
  48 #define TIFM_MS_SYS_NOCRC    0x01000
  49 #define TIFM_MS_SYS_INTCLR   0x00800
  50 #define TIFM_MS_SYS_MSIEN    0x00400
  51 #define TIFM_MS_SYS_FCLR     0x00200
  52 #define TIFM_MS_SYS_FDIR     0x00100
  53 #define TIFM_MS_SYS_DAM      0x00080
  54 #define TIFM_MS_SYS_DRM      0x00040
  55 #define TIFM_MS_SYS_DRQSL    0x00020
  56 #define TIFM_MS_SYS_REI      0x00010
  57 #define TIFM_MS_SYS_REO      0x00008
  58 #define TIFM_MS_SYS_BSY_MASK 0x00007
  59
  60 #define TIFM_MS_SYS_FIFO     (TIFM_MS_SYS_INTEN | TIFM_MS_SYS_MSIEN \
  61                               | TIFM_MS_SYS_FCLR | TIFM_MS_SYS_BSY_MASK)
  62
  63 /* Hardware flags */
  64 enum {
  65         CMD_READY  = 0x01,
  66         FIFO_READY = 0x02,
  67         CARD_INT   = 0x04
  68 };
  69
  70 struct tifm_ms {
  71         struct tifm_dev         *dev;
  72         struct timer_list       timer;
  73         struct memstick_request *req;
  74         struct tasklet_struct   notify;
  75         unsigned int            mode_mask;
  76         unsigned int            block_pos;
  77         unsigned long           timeout_jiffies;
  78         unsigned char           eject:1,
  79                                 use_dma:1;
  80         unsigned char           cmd_flags;
  81         unsigned char           io_pos;
  82         unsigned int            io_word;
  83 };
  84
  85 static unsigned int tifm_ms_read_data(struct tifm_ms *host,
  86                                       unsigned char *buf, unsigned int length)
  87 {
  88         struct tifm_dev *sock = host->dev;
  89         unsigned int off = 0;
  90
  91         while (host->io_pos && length) {
  92                 buf[off++] = host->io_word & 0xff;
  93                 host->io_word >>= 8;
  94                 length--;
  95                 host->io_pos--;
  96         }
  97
  98         if (!length)
  99                 return off;
 100
 101         while (!(TIFM_MS_STAT_EMP & readl(sock->addr + SOCK_MS_STATUS))) {
 102                 if (length < 4)
 103                         break;
 104                 *(unsigned int *)(buf + off) = __raw_readl(sock->addr
 105                                                            + SOCK_MS_DATA);
 106                 length -= 4;
 107                 off += 4;
 108         }
 109
 110         if (length
 111             && !(TIFM_MS_STAT_EMP & readl(sock->addr + SOCK_MS_STATUS))) {
 112                 host->io_word = readl(sock->addr + SOCK_MS_DATA);
 113                 for (host->io_pos = 4; host->io_pos; --host->io_pos) {
 114                         buf[off++] = host->io_word & 0xff;
 115                         host->io_word >>= 8;
 116                         length--;
 117                         if (!length)
 118                                 break;
 119                 }
 120         }
 121
 122         return off;
 123 }
 124
 125 static unsigned int tifm_ms_write_data(struct tifm_ms *host,
 126                                        unsigned char *buf, unsigned int length)
 127 {
 128         struct tifm_dev *sock = host->dev;
 129         unsigned int off = 0;
 130
 131         if (host->io_pos) {
 132                 while (host->io_pos < 4 && length) {
 133                         host->io_word |=  buf[off++] << (host->io_pos * 8);
 134                         host->io_pos++;
 135                         length--;
 136                 }
 137         }
 138
 139         if (host->io_pos == 4
 140             && !(TIFM_MS_STAT_FUL & readl(sock->addr + SOCK_MS_STATUS))) {
 141                 writel(TIFM_MS_SYS_FDIR | readl(sock->addr + SOCK_MS_SYSTEM),
 142                        sock->addr + SOCK_MS_SYSTEM);
 143                 writel(host->io_word, sock->addr + SOCK_MS_DATA);
 144                 host->io_pos = 0;
 145                 host->io_word = 0;
 146         } else if (host->io_pos) {
 147                 return off;
 148         }
 149
 150         if (!length)
 151                 return off;
 152
 153         while (!(TIFM_MS_STAT_FUL & readl(sock->addr + SOCK_MS_STATUS))) {
 154                 if (length < 4)
 155                         break;
 156                 writel(TIFM_MS_SYS_FDIR | readl(sock->addr + SOCK_MS_SYSTEM),
 157                        sock->addr + SOCK_MS_SYSTEM);
 158                 __raw_writel(*(unsigned int *)(buf + off),
 159                              sock->addr + SOCK_MS_DATA);
 160                 length -= 4;
 161                 off += 4;
 162         }
 163
 164         switch (length) {
 165         case 3:
 166                 host->io_word |= buf[off + 2] << 16;
 167                 host->io_pos++;
 168         case 2:
 169                 host->io_word |= buf[off + 1] << 8;
 170                 host->io_pos++;
 171         case 1:
 172                 host->io_word |= buf[off];
 173                 host->io_pos++;
 174         }
 175
 176         off += host->io_pos;
 177
 178         return off;
 179 }
 180
 181 static unsigned int tifm_ms_transfer_data(struct tifm_ms *host)
 182 {
 183         struct tifm_dev *sock = host->dev;
 184         unsigned int length;
 185         unsigned int off;
 186         unsigned int t_size, p_cnt;
 187         unsigned char *buf;
 188         struct page *pg;
 189         unsigned long flags = 0;
 190
 191         if (host->req->long_data) {
 192                 length = host->req->sg.length - host->block_pos;
 193                 off = host->req->sg.offset + host->block_pos;
 194         } else {
 195                 length = host->req->data_len - host->block_pos;
 196                 off = 0;
 197         }
 198         dev_dbg(&sock->dev, "fifo data transfer, %d, %d\n", length,
 199                 host->block_pos);
 200
 201         while (length) {
 202                 unsigned int uninitialized_var(p_off);
 203
 204                 if (host->req->long_data) {
 205                         pg = nth_page(sg_page(&host->req->sg),
 206                                       off >> PAGE_SHIFT);
 207                         p_off = offset_in_page(off);
 208                         p_cnt = PAGE_SIZE - p_off;
 209                         p_cnt = min(p_cnt, length);
 210
 211                         local_irq_save(flags);
 212                         buf = kmap_atomic(pg, KM_BIO_SRC_IRQ) + p_off;
 213                 } else {
 214                         buf = host->req->data + host->block_pos;
 215                         p_cnt = host->req->data_len - host->block_pos;
 216                 }
 217
 218                 t_size = host->req->data_dir == WRITE
 219                          ? tifm_ms_write_data(host, buf, p_cnt)
 220                          : tifm_ms_read_data(host, buf, p_cnt);
 221
 222                 if (host->req->long_data) {
 223                         kunmap_atomic(buf - p_off, KM_BIO_SRC_IRQ);
 224                         local_irq_restore(flags);
 225                 }
 226
 227                 if (!t_size)
 228                         break;
 229                 host->block_pos += t_size;
 230                 length -= t_size;
 231                 off += t_size;
 232         }
 233
 234         dev_dbg(&sock->dev, "fifo data transfer, %d remaining\n", length);
 235         if (!length && (host->req->data_dir == WRITE)) {
 236                 if (host->io_pos) {
 237                         writel(TIFM_MS_SYS_FDIR
 238                                | readl(sock->addr + SOCK_MS_SYSTEM),
 239                                sock->addr + SOCK_MS_SYSTEM);
 240                         writel(host->io_word, sock->addr + SOCK_MS_DATA);
 241                 }
 242                 writel(TIFM_MS_SYS_FDIR
 243                        | readl(sock->addr + SOCK_MS_SYSTEM),
 244                        sock->addr + SOCK_MS_SYSTEM);
 245                 writel(0, sock->addr + SOCK_MS_DATA);
 246         } else {
 247                 readl(sock->addr + SOCK_MS_DATA);
 248         }
 249
 250         return length;
 251 }
 252
 253 static int tifm_ms_issue_cmd(struct tifm_ms *host)
 254 {
 255         struct tifm_dev *sock = host->dev;
 256         unsigned char *data;
 257         unsigned int data_len, cmd, sys_param;
 258
 259         host->cmd_flags = 0;
 260         host->block_pos = 0;
 261         host->io_pos = 0;
 262         host->io_word = 0;
 263         host->cmd_flags = 0;
 264
 265         data = host->req->data;
 266
 267         host->use_dma = !no_dma;
 268
 269         if (host->req->long_data) {
 270                 data_len = host->req->sg.length;
 271                 if (!is_power_of_2(data_len))
 272                         host->use_dma = 0;
 273         } else {
 274                 data_len = host->req->data_len;
 275                 host->use_dma = 0;
 276         }
 277
 278         writel(TIFM_FIFO_INT_SETALL,
 279                sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
 280         writel(TIFM_FIFO_ENABLE,
 281                sock->addr + SOCK_FIFO_CONTROL);
 282
 283         if (host->use_dma) {
 284                 if (1 != tifm_map_sg(sock, &host->req->sg, 1,
 285                                      host->req->data_dir == READ
 286                                      ? PCI_DMA_FROMDEVICE
 287                                      : PCI_DMA_TODEVICE)) {
 288                         host->req->error = -ENOMEM;
 289                         return host->req->error;
 290                 }
 291                 data_len = sg_dma_len(&host->req->sg);
 292
 293                 writel(ilog2(data_len) - 2,
 294                        sock->addr + SOCK_FIFO_PAGE_SIZE);
 295                 writel(TIFM_FIFO_INTMASK,
 296                        sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET);
 297                 sys_param = TIFM_DMA_EN | (1 << 8);
 298                 if (host->req->data_dir == WRITE)
 299                         sys_param |= TIFM_DMA_TX;
 300
 301                 writel(TIFM_FIFO_INTMASK,
 302                        sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET);
 303
 304                 writel(sg_dma_address(&host->req->sg),
 305                        sock->addr + SOCK_DMA_ADDRESS);
 306                 writel(sys_param, sock->addr + SOCK_DMA_CONTROL);
 307         } else {
 308                 writel(host->mode_mask | TIFM_MS_SYS_FIFO,
 309                        sock->addr + SOCK_MS_SYSTEM);
 310
 311                 writel(TIFM_FIFO_MORE,
 312                        sock->addr + SOCK_DMA_FIFO_INT_ENABLE_SET);
 313         }
 314
 315         mod_timer(&host->timer, jiffies + host->timeout_jiffies);
 316         writel(TIFM_CTRL_LED | readl(sock->addr + SOCK_CONTROL),
 317                sock->addr + SOCK_CONTROL);
 318         host->req->error = 0;
 319
 320         sys_param = readl(sock->addr + SOCK_MS_SYSTEM);
 321         sys_param |= TIFM_MS_SYS_INTCLR;
 322
 323         if (host->use_dma)
 324                 sys_param |= TIFM_MS_SYS_DMA;
 325         else
 326                 sys_param &= ~TIFM_MS_SYS_DMA;
 327
 328         writel(sys_param, sock->addr + SOCK_MS_SYSTEM);
 329
 330         cmd = (host->req->tpc & 0xf) << 12;
 331         cmd |= data_len;
 332         writel(cmd, sock->addr + SOCK_MS_COMMAND);
 333
 334         dev_dbg(&sock->dev, "executing TPC %x, %x\n", cmd, sys_param);
 335         return 0;
 336 }
 337
 338 static void tifm_ms_complete_cmd(struct tifm_ms *host)
 339 {
 340         struct tifm_dev *sock = host->dev;
 341         struct memstick_host *msh = tifm_get_drvdata(sock);
 342         int rc;
 343
 344         del_timer(&host->timer);
 345
 346         host->req->int_reg = readl(sock->addr + SOCK_MS_STATUS) & 0xff;
 347         host->req->int_reg = (host->req->int_reg & 1)
 348                              | ((host->req->int_reg << 4) & 0xe0);
 349
 350         writel(TIFM_FIFO_INT_SETALL,
 351                sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
 352         writel(TIFM_DMA_RESET, sock->addr + SOCK_DMA_CONTROL);
 353
 354         if (host->use_dma) {
 355                 tifm_unmap_sg(sock, &host->req->sg, 1,
 356                               host->req->data_dir == READ
 357                               ? PCI_DMA_FROMDEVICE
 358                               : PCI_DMA_TODEVICE);
 359         }
 360
 361         writel((~TIFM_CTRL_LED) & readl(sock->addr + SOCK_CONTROL),
 362                sock->addr + SOCK_CONTROL);
 363
 364         dev_dbg(&sock->dev, "TPC complete\n");
 365         do {
 366                 rc = memstick_next_req(msh, &host->req);
 367         } while (!rc && tifm_ms_issue_cmd(host));
 368 }
 369
 370 static int tifm_ms_check_status(struct tifm_ms *host)
 371 {
 372         if (!host->req->error) {
 373                 if (!(host->cmd_flags & CMD_READY))
 374                         return 1;
 375                 if (!(host->cmd_flags & FIFO_READY))
 376                         return 1;
 377                 if (host->req->need_card_int
 378                     && !(host->cmd_flags & CARD_INT))
 379                         return 1;
 380         }
 381         return 0;
 382 }
 383
 384 /* Called from interrupt handler */
 385 static void tifm_ms_data_event(struct tifm_dev *sock)
 386 {
 387         struct tifm_ms *host;
 388         unsigned int fifo_status = 0, host_status = 0;
 389         int rc = 1;
 390
 391         spin_lock(&sock->lock);
 392         host = memstick_priv((struct memstick_host *)tifm_get_drvdata(sock));
 393         fifo_status = readl(sock->addr + SOCK_DMA_FIFO_STATUS);
 394         host_status = readl(sock->addr + SOCK_MS_STATUS);
 395         dev_dbg(&sock->dev,
 396                 "data event: fifo_status %x, host_status %x, flags %x\n",
 397                 fifo_status, host_status, host->cmd_flags);
 398
 399         if (host->req) {
 400                 if (host->use_dma && (fifo_status & 1)) {
 401                         host->cmd_flags |= FIFO_READY;
 402                         rc = tifm_ms_check_status(host);
 403                 }
 404                 if (!host->use_dma && (fifo_status & TIFM_FIFO_MORE)) {
 405                         if (!tifm_ms_transfer_data(host)) {
 406                                 host->cmd_flags |= FIFO_READY;
 407                                 rc = tifm_ms_check_status(host);
 408                         }
 409                 }
 410         }
 411
 412         writel(fifo_status, sock->addr + SOCK_DMA_FIFO_STATUS);
 413         if (!rc)
 414                 tifm_ms_complete_cmd(host);
 415
 416         spin_unlock(&sock->lock);
 417 }
 418
 419
 420 /* Called from interrupt handler */
 421 static void tifm_ms_card_event(struct tifm_dev *sock)
 422 {
 423         struct tifm_ms *host;
 424         unsigned int host_status = 0;
 425         int rc = 1;
 426
 427         spin_lock(&sock->lock);
 428         host = memstick_priv((struct memstick_host *)tifm_get_drvdata(sock));
 429         host_status = readl(sock->addr + SOCK_MS_STATUS);
 430         dev_dbg(&sock->dev, "host event: host_status %x, flags %x\n",
 431                 host_status, host->cmd_flags);
 432
 433         if (host->req) {
 434                 if (host_status & TIFM_MS_STAT_TOE)
 435                         host->req->error = -ETIME;
 436                 else if (host_status & TIFM_MS_STAT_CRC)
 437                         host->req->error = -EILSEQ;
 438
 439                 if (host_status & TIFM_MS_STAT_RDY)
 440                         host->cmd_flags |= CMD_READY;
 441
 442                 if (host_status & TIFM_MS_STAT_MSINT)
 443                         host->cmd_flags |= CARD_INT;
 444
 445                 rc = tifm_ms_check_status(host);
 446
 447         }
 448
 449         writel(TIFM_MS_SYS_INTCLR | readl(sock->addr + SOCK_MS_SYSTEM),
 450                sock->addr + SOCK_MS_SYSTEM);
 451
 452         if (!rc)
 453                 tifm_ms_complete_cmd(host);
 454
 455         spin_unlock(&sock->lock);
 456         return;
 457 }
 458
 459 static void tifm_ms_req_tasklet(unsigned long data)
 460 {
 461         struct memstick_host *msh = (struct memstick_host *)data;
 462         struct tifm_ms *host = memstick_priv(msh);
 463         struct tifm_dev *sock = host->dev;
 464         unsigned long flags;
 465         int rc;
 466
 467         spin_lock_irqsave(&sock->lock, flags);
 468         if (!host->req) {
 469                 if (host->eject) {
 470                         do {
 471                                 rc = memstick_next_req(msh, &host->req);
 472                                 if (!rc)
 473                                         host->req->error = -ETIME;
 474                         } while (!rc);
 475                         spin_unlock_irqrestore(&sock->lock, flags);
 476                         return;
 477                 }
 478
 479                 do {
 480                         rc = memstick_next_req(msh, &host->req);
 481                 } while (!rc && tifm_ms_issue_cmd(host));
 482         }
 483         spin_unlock_irqrestore(&sock->lock, flags);
 484 }
 485
 486 static void tifm_ms_dummy_submit(struct memstick_host *msh)
 487 {
 488         return;
 489 }
 490
 491 static void tifm_ms_submit_req(struct memstick_host *msh)
 492 {
 493         struct tifm_ms *host = memstick_priv(msh);
 494
 495         tasklet_schedule(&host->notify);
 496 }
 497
 498 static int tifm_ms_set_param(struct memstick_host *msh,
 499                              enum memstick_param param,
 500                              int value)
 501 {
 502         struct tifm_ms *host = memstick_priv(msh);
 503         struct tifm_dev *sock = host->dev;
 504
 505         switch (param) {
 506         case MEMSTICK_POWER:
 507                 /* also affected by media detection mechanism */
 508                 if (value == MEMSTICK_POWER_ON) {
 509                         host->mode_mask = TIFM_MS_SYS_SRAC | TIFM_MS_SYS_REI;
 510                         writel(TIFM_MS_SYS_RESET, sock->addr + SOCK_MS_SYSTEM);
 511                         writel(TIFM_MS_SYS_FCLR | TIFM_MS_SYS_INTCLR,
 512                                sock->addr + SOCK_MS_SYSTEM);
 513                         writel(0xffffffff, sock->addr + SOCK_MS_STATUS);
 514                 } else if (value == MEMSTICK_POWER_OFF) {
 515                         writel(TIFM_MS_SYS_FCLR | TIFM_MS_SYS_INTCLR,
 516                                sock->addr + SOCK_MS_SYSTEM);
 517                         writel(0xffffffff, sock->addr + SOCK_MS_STATUS);
 518                 } else
 519                         return -EINVAL;
 520                 break;
 521         case MEMSTICK_INTERFACE:
 522                 if (value == MEMSTICK_SERIAL) {
 523                         host->mode_mask = TIFM_MS_SYS_SRAC | TIFM_MS_SYS_REI;
 524                         writel((~TIFM_CTRL_FAST_CLK)
 525                                & readl(sock->addr + SOCK_CONTROL),
 526                                sock->addr + SOCK_CONTROL);
 527                 } else if (value == MEMSTICK_PAR4) {
 528                         host->mode_mask = 0;
 529                         writel(TIFM_CTRL_FAST_CLK
 530                                | readl(sock->addr + SOCK_CONTROL),
 531                                sock->addr + SOCK_CONTROL);
 532                 } else
 533                         return -EINVAL;
 534                 break;
 535         };
 536
 537         return 0;
 538 }
 539
 540 static void tifm_ms_abort(unsigned long data)
 541 {
 542         struct tifm_ms *host = (struct tifm_ms *)data;
 543
 544         dev_dbg(&host->dev->dev, "status %x\n",
 545                 readl(host->dev->addr + SOCK_MS_STATUS));
 546         printk(KERN_ERR
 547                "%s : card failed to respond for a long period of time "
 548                "(%x, %x)\n",
 549                dev_name(&host->dev->dev), host->req ? host->req->tpc : 0,
 550                host->cmd_flags);
 551
 552         tifm_eject(host->dev);
 553 }
 554
 555 static int tifm_ms_probe(struct tifm_dev *sock)
 556 {
 557         struct memstick_host *msh;
 558         struct tifm_ms *host;
 559         int rc = -EIO;
 560
 561         if (!(TIFM_SOCK_STATE_OCCUPIED
 562               & readl(sock->addr + SOCK_PRESENT_STATE))) {
 563                 printk(KERN_WARNING "%s : card gone, unexpectedly\n",
 564                        dev_name(&sock->dev));
 565                 return rc;
 566         }
 567
 568         msh = memstick_alloc_host(sizeof(struct tifm_ms), &sock->dev);
 569         if (!msh)
 570                 return -ENOMEM;
 571
 572         host = memstick_priv(msh);
 573         tifm_set_drvdata(sock, msh);
 574         host->dev = sock;
 575         host->timeout_jiffies = msecs_to_jiffies(1000);
 576
 577         setup_timer(&host->timer, tifm_ms_abort, (unsigned long)host);
 578         tasklet_init(&host->notify, tifm_ms_req_tasklet, (unsigned long)msh);
 579
 580         msh->request = tifm_ms_submit_req;
 581         msh->set_param = tifm_ms_set_param;
 582         sock->card_event = tifm_ms_card_event;
 583         sock->data_event = tifm_ms_data_event;
 584         if (tifm_has_ms_pif(sock))
 585                 msh->caps |= MEMSTICK_CAP_PAR4;
 586
 587         rc = memstick_add_host(msh);
 588         if (!rc)
 589                 return 0;
 590
 591         memstick_free_host(msh);
 592         return rc;
 593 }
 594
 595 static void tifm_ms_remove(struct tifm_dev *sock)
 596 {
 597         struct memstick_host *msh = tifm_get_drvdata(sock);
 598         struct tifm_ms *host = memstick_priv(msh);
 599         int rc = 0;
 600         unsigned long flags;
 601
 602         msh->request = tifm_ms_dummy_submit;
 603         tasklet_kill(&host->notify);
 604         spin_lock_irqsave(&sock->lock, flags);
 605         host->eject = 1;
 606         if (host->req) {
 607                 del_timer(&host->timer);
 608                 writel(TIFM_FIFO_INT_SETALL,
 609                        sock->addr + SOCK_DMA_FIFO_INT_ENABLE_CLEAR);
 610                 writel(TIFM_DMA_RESET, sock->addr + SOCK_DMA_CONTROL);
 611                 if (host->use_dma)
 612                         tifm_unmap_sg(sock, &host->req->sg, 1,
 613                                       host->req->data_dir == READ
 614                                       ? PCI_DMA_TODEVICE
 615                                       : PCI_DMA_FROMDEVICE);
 616                 host->req->error = -ETIME;
 617
 618                 do {
 619                         rc = memstick_next_req(msh, &host->req);
 620                         if (!rc)
 621                                 host->req->error = -ETIME;
 622                 } while (!rc);
 623         }
 624         spin_unlock_irqrestore(&sock->lock, flags);
 625
 626         memstick_remove_host(msh);
 627         memstick_free_host(msh);
 628 }
 629
 630 #ifdef CONFIG_PM
 631
 632 static int tifm_ms_suspend(struct tifm_dev *sock, pm_message_t state)
 633 {
 634         struct memstick_host *msh = tifm_get_drvdata(sock);
 635
 636         memstick_suspend_host(msh);
 637         return 0;
 638 }
 639
 640 static int tifm_ms_resume(struct tifm_dev *sock)
 641 {
 642         struct memstick_host *msh = tifm_get_drvdata(sock);
 643
 644         memstick_resume_host(msh);
 645         return 0;
 646 }
 647
 648 #else
 649
 650 #define tifm_ms_suspend NULL
 651 #define tifm_ms_resume NULL
 652
 653 #endif /* CONFIG_PM */
 654
 655 static struct tifm_device_id tifm_ms_id_tbl[] = {
 656         { TIFM_TYPE_MS }, { 0 }
 657 };
 658
 659 static struct tifm_driver tifm_ms_driver = {
 660         .driver = {
 661                 .name  = DRIVER_NAME,
 662                 .owner = THIS_MODULE
 663         },
 664         .id_table = tifm_ms_id_tbl,
 665         .probe    = tifm_ms_probe,
 666         .remove   = tifm_ms_remove,
 667         .suspend  = tifm_ms_suspend,
 668         .resume   = tifm_ms_resume
 669 };
 670
 671 static int __init tifm_ms_init(void)
 672 {
 673         return tifm_register_driver(&tifm_ms_driver);
 674 }
 675
 676 static void __exit tifm_ms_exit(void)
 677 {
 678         tifm_unregister_driver(&tifm_ms_driver);
 679 }
 680
 681 MODULE_AUTHOR("Alex Dubov");
 682 MODULE_DESCRIPTION("TI FlashMedia MemoryStick driver");
 683 MODULE_LICENSE("GPL");
 684 MODULE_DEVICE_TABLE(tifm, tifm_ms_id_tbl);
 685
 686 module_init(tifm_ms_init);
 687 module_exit(tifm_ms_exit);