git.oblomov.eu Git - linux-2.6/blob - drivers/mmc/sdhci.c

   1 /*
   2  *  linux/drivers/mmc/sdhci.c - Secure Digital Host Controller Interface driver
   3  *
   4  *  Copyright (C) 2005-2006 Pierre Ossman, All Rights Reserved.
   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
  11 #include <linux/delay.h>
  12 #include <linux/highmem.h>
  13 #include <linux/pci.h>
  14 #include <linux/dma-mapping.h>
  15
  16 #include <linux/mmc/host.h>
  17 #include <linux/mmc/protocol.h>
  18
  19 #include <asm/scatterlist.h>
  20
  21 #include "sdhci.h"
  22
  23 #define DRIVER_NAME "sdhci"
  24 #define DRIVER_VERSION "0.11"
  25
  26 #define BUGMAIL "<sdhci-devel@list.drzeus.cx>"
  27
  28 #define DBG(f, x...) \
  29         pr_debug(DRIVER_NAME " [%s()]: " f, __func__,## x)
  30
  31 static const struct pci_device_id pci_ids[] __devinitdata = {
  32         /* handle any SD host controller */
  33         {PCI_DEVICE_CLASS((PCI_CLASS_SYSTEM_SDHCI << 8), 0xFFFF00)},
  34         { /* end: all zeroes */ },
  35 };
  36
  37 MODULE_DEVICE_TABLE(pci, pci_ids);
  38
  39 static void sdhci_prepare_data(struct sdhci_host *, struct mmc_data *);
  40 static void sdhci_finish_data(struct sdhci_host *);
  41
  42 static void sdhci_send_command(struct sdhci_host *, struct mmc_command *);
  43 static void sdhci_finish_command(struct sdhci_host *);
  44
  45 static void sdhci_dumpregs(struct sdhci_host *host)
  46 {
  47         printk(KERN_DEBUG DRIVER_NAME ": ============== REGISTER DUMP ==============\n");
  48
  49         printk(KERN_DEBUG DRIVER_NAME ": Sys addr: 0x%08x | Version:  0x%08x\n",
  50                 readl(host->ioaddr + SDHCI_DMA_ADDRESS),
  51                 readw(host->ioaddr + SDHCI_HOST_VERSION));
  52         printk(KERN_DEBUG DRIVER_NAME ": Blk size: 0x%08x | Blk cnt:  0x%08x\n",
  53                 readw(host->ioaddr + SDHCI_BLOCK_SIZE),
  54                 readw(host->ioaddr + SDHCI_BLOCK_COUNT));
  55         printk(KERN_DEBUG DRIVER_NAME ": Argument: 0x%08x | Trn mode: 0x%08x\n",
  56                 readl(host->ioaddr + SDHCI_ARGUMENT),
  57                 readw(host->ioaddr + SDHCI_TRANSFER_MODE));
  58         printk(KERN_DEBUG DRIVER_NAME ": Present:  0x%08x | Host ctl: 0x%08x\n",
  59                 readl(host->ioaddr + SDHCI_PRESENT_STATE),
  60                 readb(host->ioaddr + SDHCI_HOST_CONTROL));
  61         printk(KERN_DEBUG DRIVER_NAME ": Power:    0x%08x | Blk gap:  0x%08x\n",
  62                 readb(host->ioaddr + SDHCI_POWER_CONTROL),
  63                 readb(host->ioaddr + SDHCI_BLOCK_GAP_CONTROL));
  64         printk(KERN_DEBUG DRIVER_NAME ": Wake-up:  0x%08x | Clock:    0x%08x\n",
  65                 readb(host->ioaddr + SDHCI_WALK_UP_CONTROL),
  66                 readw(host->ioaddr + SDHCI_CLOCK_CONTROL));
  67         printk(KERN_DEBUG DRIVER_NAME ": Timeout:  0x%08x | Int stat: 0x%08x\n",
  68                 readb(host->ioaddr + SDHCI_TIMEOUT_CONTROL),
  69                 readl(host->ioaddr + SDHCI_INT_STATUS));
  70         printk(KERN_DEBUG DRIVER_NAME ": Int enab: 0x%08x | Sig enab: 0x%08x\n",
  71                 readl(host->ioaddr + SDHCI_INT_ENABLE),
  72                 readl(host->ioaddr + SDHCI_SIGNAL_ENABLE));
  73         printk(KERN_DEBUG DRIVER_NAME ": AC12 err: 0x%08x | Slot int: 0x%08x\n",
  74                 readw(host->ioaddr + SDHCI_ACMD12_ERR),
  75                 readw(host->ioaddr + SDHCI_SLOT_INT_STATUS));
  76         printk(KERN_DEBUG DRIVER_NAME ": Caps:     0x%08x | Max curr: 0x%08x\n",
  77                 readl(host->ioaddr + SDHCI_CAPABILITIES),
  78                 readl(host->ioaddr + SDHCI_MAX_CURRENT));
  79
  80         printk(KERN_DEBUG DRIVER_NAME ": ===========================================\n");
  81 }
  82
  83 /*****************************************************************************\
  84  *                                                                           *
  85  * Low level functions                                                       *
  86  *                                                                           *
  87 \*****************************************************************************/
  88
  89 static void sdhci_reset(struct sdhci_host *host, u8 mask)
  90 {
  91         unsigned long timeout;
  92
  93         writeb(mask, host->ioaddr + SDHCI_SOFTWARE_RESET);
  94
  95         if (mask & SDHCI_RESET_ALL)
  96                 host->clock = 0;
  97
  98         /* Wait max 100 ms */
  99         timeout = 100;
 100
 101         /* hw clears the bit when it's done */
 102         while (readb(host->ioaddr + SDHCI_SOFTWARE_RESET) & mask) {
 103                 if (timeout == 0) {
 104                         printk(KERN_ERR "%s: Reset 0x%x never completed. "
 105                                 "Please report this to " BUGMAIL ".\n",
 106                                 mmc_hostname(host->mmc), (int)mask);
 107                         sdhci_dumpregs(host);
 108                         return;
 109                 }
 110                 timeout--;
 111                 mdelay(1);
 112         }
 113 }
 114
 115 static void sdhci_init(struct sdhci_host *host)
 116 {
 117         u32 intmask;
 118
 119         sdhci_reset(host, SDHCI_RESET_ALL);
 120
 121         intmask = SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT |
 122                 SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_INDEX |
 123                 SDHCI_INT_END_BIT | SDHCI_INT_CRC | SDHCI_INT_TIMEOUT |
 124                 SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT |
 125                 SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL |
 126                 SDHCI_INT_DMA_END | SDHCI_INT_DATA_END | SDHCI_INT_RESPONSE;
 127
 128         writel(intmask, host->ioaddr + SDHCI_INT_ENABLE);
 129         writel(intmask, host->ioaddr + SDHCI_SIGNAL_ENABLE);
 130 }
 131
 132 static void sdhci_activate_led(struct sdhci_host *host)
 133 {
 134         u8 ctrl;
 135
 136         ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
 137         ctrl |= SDHCI_CTRL_LED;
 138         writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
 139 }
 140
 141 static void sdhci_deactivate_led(struct sdhci_host *host)
 142 {
 143         u8 ctrl;
 144
 145         ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
 146         ctrl &= ~SDHCI_CTRL_LED;
 147         writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
 148 }
 149
 150 /*****************************************************************************\
 151  *                                                                           *
 152  * Core functions                                                            *
 153  *                                                                           *
 154 \*****************************************************************************/
 155
 156 static inline char* sdhci_kmap_sg(struct sdhci_host* host)
 157 {
 158         host->mapped_sg = kmap_atomic(host->cur_sg->page, KM_BIO_SRC_IRQ);
 159         return host->mapped_sg + host->cur_sg->offset;
 160 }
 161
 162 static inline void sdhci_kunmap_sg(struct sdhci_host* host)
 163 {
 164         kunmap_atomic(host->mapped_sg, KM_BIO_SRC_IRQ);
 165 }
 166
 167 static inline int sdhci_next_sg(struct sdhci_host* host)
 168 {
 169         /*
 170          * Skip to next SG entry.
 171          */
 172         host->cur_sg++;
 173         host->num_sg--;
 174
 175         /*
 176          * Any entries left?
 177          */
 178         if (host->num_sg > 0) {
 179                 host->offset = 0;
 180                 host->remain = host->cur_sg->length;
 181         }
 182
 183         return host->num_sg;
 184 }
 185
 186 static void sdhci_read_block_pio(struct sdhci_host *host)
 187 {
 188         int blksize, chunk_remain;
 189         u32 data;
 190         char *buffer;
 191         int size;
 192
 193         DBG("PIO reading\n");
 194
 195         blksize = host->data->blksz;
 196         chunk_remain = 0;
 197         data = 0;
 198
 199         buffer = sdhci_kmap_sg(host) + host->offset;
 200
 201         while (blksize) {
 202                 if (chunk_remain == 0) {
 203                         data = readl(host->ioaddr + SDHCI_BUFFER);
 204                         chunk_remain = min(blksize, 4);
 205                 }
 206
 207                 size = min(host->size, host->remain);
 208                 size = min(size, chunk_remain);
 209
 210                 chunk_remain -= size;
 211                 blksize -= size;
 212                 host->offset += size;
 213                 host->remain -= size;
 214                 host->size -= size;
 215                 while (size) {
 216                         *buffer = data & 0xFF;
 217                         buffer++;
 218                         data >>= 8;
 219                         size--;
 220                 }
 221
 222                 if (host->remain == 0) {
 223                         sdhci_kunmap_sg(host);
 224                         if (sdhci_next_sg(host) == 0) {
 225                                 BUG_ON(blksize != 0);
 226                                 return;
 227                         }
 228                         buffer = sdhci_kmap_sg(host);
 229                 }
 230         }
 231
 232         sdhci_kunmap_sg(host);
 233 }
 234
 235 static void sdhci_write_block_pio(struct sdhci_host *host)
 236 {
 237         int blksize, chunk_remain;
 238         u32 data;
 239         char *buffer;
 240         int bytes, size;
 241
 242         DBG("PIO writing\n");
 243
 244         blksize = host->data->blksz;
 245         chunk_remain = 4;
 246         data = 0;
 247
 248         bytes = 0;
 249         buffer = sdhci_kmap_sg(host) + host->offset;
 250
 251         while (blksize) {
 252                 size = min(host->size, host->remain);
 253                 size = min(size, chunk_remain);
 254
 255                 chunk_remain -= size;
 256                 blksize -= size;
 257                 host->offset += size;
 258                 host->remain -= size;
 259                 host->size -= size;
 260                 while (size) {
 261                         data >>= 8;
 262                         data |= (u32)*buffer << 24;
 263                         buffer++;
 264                         size--;
 265                 }
 266
 267                 if (chunk_remain == 0) {
 268                         writel(data, host->ioaddr + SDHCI_BUFFER);
 269                         chunk_remain = min(blksize, 4);
 270                 }
 271
 272                 if (host->remain == 0) {
 273                         sdhci_kunmap_sg(host);
 274                         if (sdhci_next_sg(host) == 0) {
 275                                 BUG_ON(blksize != 0);
 276                                 return;
 277                         }
 278                         buffer = sdhci_kmap_sg(host);
 279                 }
 280         }
 281
 282         sdhci_kunmap_sg(host);
 283 }
 284
 285 static void sdhci_transfer_pio(struct sdhci_host *host)
 286 {
 287         u32 mask;
 288
 289         BUG_ON(!host->data);
 290
 291         if (host->size == 0)
 292                 return;
 293
 294         if (host->data->flags & MMC_DATA_READ)
 295                 mask = SDHCI_DATA_AVAILABLE;
 296         else
 297                 mask = SDHCI_SPACE_AVAILABLE;
 298
 299         while (readl(host->ioaddr + SDHCI_PRESENT_STATE) & mask) {
 300                 if (host->data->flags & MMC_DATA_READ)
 301                         sdhci_read_block_pio(host);
 302                 else
 303                         sdhci_write_block_pio(host);
 304
 305                 if (host->size == 0)
 306                         break;
 307
 308                 BUG_ON(host->num_sg == 0);
 309         }
 310
 311         DBG("PIO transfer complete.\n");
 312 }
 313
 314 static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_data *data)
 315 {
 316         u8 count;
 317         unsigned target_timeout, current_timeout;
 318
 319         WARN_ON(host->data);
 320
 321         if (data == NULL)
 322                 return;
 323
 324         DBG("blksz %04x blks %04x flags %08x\n",
 325                 data->blksz, data->blocks, data->flags);
 326         DBG("tsac %d ms nsac %d clk\n",
 327                 data->timeout_ns / 1000000, data->timeout_clks);
 328
 329         /* Sanity checks */
 330         BUG_ON(data->blksz * data->blocks > 524288);
 331         BUG_ON(data->blksz > host->max_block);
 332         BUG_ON(data->blocks > 65535);
 333
 334         /* timeout in us */
 335         target_timeout = data->timeout_ns / 1000 +
 336                 data->timeout_clks / host->clock;
 337
 338         /*
 339          * Figure out needed cycles.
 340          * We do this in steps in order to fit inside a 32 bit int.
 341          * The first step is the minimum timeout, which will have a
 342          * minimum resolution of 6 bits:
 343          * (1) 2^13*1000 > 2^22,
 344          * (2) host->timeout_clk < 2^16
 345          *     =>
 346          *     (1) / (2) > 2^6
 347          */
 348         count = 0;
 349         current_timeout = (1 << 13) * 1000 / host->timeout_clk;
 350         while (current_timeout < target_timeout) {
 351                 count++;
 352                 current_timeout <<= 1;
 353                 if (count >= 0xF)
 354                         break;
 355         }
 356
 357         if (count >= 0xF) {
 358                 printk(KERN_WARNING "%s: Too large timeout requested!\n",
 359                         mmc_hostname(host->mmc));
 360                 count = 0xE;
 361         }
 362
 363         writeb(count, host->ioaddr + SDHCI_TIMEOUT_CONTROL);
 364
 365         if (host->flags & SDHCI_USE_DMA) {
 366                 int count;
 367
 368                 count = pci_map_sg(host->chip->pdev, data->sg, data->sg_len,
 369                         (data->flags & MMC_DATA_READ)?PCI_DMA_FROMDEVICE:PCI_DMA_TODEVICE);
 370                 BUG_ON(count != 1);
 371
 372                 writel(sg_dma_address(data->sg), host->ioaddr + SDHCI_DMA_ADDRESS);
 373         } else {
 374                 host->size = data->blksz * data->blocks;
 375
 376                 host->cur_sg = data->sg;
 377                 host->num_sg = data->sg_len;
 378
 379                 host->offset = 0;
 380                 host->remain = host->cur_sg->length;
 381         }
 382
 383         /* We do not handle DMA boundaries, so set it to max (512 KiB) */
 384         writew(SDHCI_MAKE_BLKSZ(7, data->blksz),
 385                 host->ioaddr + SDHCI_BLOCK_SIZE);
 386         writew(data->blocks, host->ioaddr + SDHCI_BLOCK_COUNT);
 387 }
 388
 389 static void sdhci_set_transfer_mode(struct sdhci_host *host,
 390         struct mmc_data *data)
 391 {
 392         u16 mode;
 393
 394         WARN_ON(host->data);
 395
 396         if (data == NULL)
 397                 return;
 398
 399         mode = SDHCI_TRNS_BLK_CNT_EN;
 400         if (data->blocks > 1)
 401                 mode |= SDHCI_TRNS_MULTI;
 402         if (data->flags & MMC_DATA_READ)
 403                 mode |= SDHCI_TRNS_READ;
 404         if (host->flags & SDHCI_USE_DMA)
 405                 mode |= SDHCI_TRNS_DMA;
 406
 407         writew(mode, host->ioaddr + SDHCI_TRANSFER_MODE);
 408 }
 409
 410 static void sdhci_finish_data(struct sdhci_host *host)
 411 {
 412         struct mmc_data *data;
 413         u16 blocks;
 414
 415         BUG_ON(!host->data);
 416
 417         data = host->data;
 418         host->data = NULL;
 419
 420         if (host->flags & SDHCI_USE_DMA) {
 421                 pci_unmap_sg(host->chip->pdev, data->sg, data->sg_len,
 422                         (data->flags & MMC_DATA_READ)?PCI_DMA_FROMDEVICE:PCI_DMA_TODEVICE);
 423         }
 424
 425         /*
 426          * Controller doesn't count down when in single block mode.
 427          */
 428         if ((data->blocks == 1) && (data->error == MMC_ERR_NONE))
 429                 blocks = 0;
 430         else
 431                 blocks = readw(host->ioaddr + SDHCI_BLOCK_COUNT);
 432         data->bytes_xfered = data->blksz * (data->blocks - blocks);
 433
 434         if ((data->error == MMC_ERR_NONE) && blocks) {
 435                 printk(KERN_ERR "%s: Controller signalled completion even "
 436                         "though there were blocks left. Please report this "
 437                         "to " BUGMAIL ".\n", mmc_hostname(host->mmc));
 438                 data->error = MMC_ERR_FAILED;
 439         }
 440
 441         if (host->size != 0) {
 442                 printk(KERN_ERR "%s: %d bytes were left untransferred. "
 443                         "Please report this to " BUGMAIL ".\n",
 444                         mmc_hostname(host->mmc), host->size);
 445                 data->error = MMC_ERR_FAILED;
 446         }
 447
 448         DBG("Ending data transfer (%d bytes)\n", data->bytes_xfered);
 449
 450         if (data->stop) {
 451                 /*
 452                  * The controller needs a reset of internal state machines
 453                  * upon error conditions.
 454                  */
 455                 if (data->error != MMC_ERR_NONE) {
 456                         sdhci_reset(host, SDHCI_RESET_CMD);
 457                         sdhci_reset(host, SDHCI_RESET_DATA);
 458                 }
 459
 460                 sdhci_send_command(host, data->stop);
 461         } else
 462                 tasklet_schedule(&host->finish_tasklet);
 463 }
 464
 465 static void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
 466 {
 467         int flags;
 468         u32 mask;
 469         unsigned long timeout;
 470
 471         WARN_ON(host->cmd);
 472
 473         DBG("Sending cmd (%x)\n", cmd->opcode);
 474
 475         /* Wait max 10 ms */
 476         timeout = 10;
 477
 478         mask = SDHCI_CMD_INHIBIT;
 479         if ((cmd->data != NULL) || (cmd->flags & MMC_RSP_BUSY))
 480                 mask |= SDHCI_DATA_INHIBIT;
 481
 482         /* We shouldn't wait for data inihibit for stop commands, even
 483            though they might use busy signaling */
 484         if (host->mrq->data && (cmd == host->mrq->data->stop))
 485                 mask &= ~SDHCI_DATA_INHIBIT;
 486
 487         while (readl(host->ioaddr + SDHCI_PRESENT_STATE) & mask) {
 488                 if (timeout == 0) {
 489                         printk(KERN_ERR "%s: Controller never released "
 490                                 "inhibit bit(s). Please report this to "
 491                                 BUGMAIL ".\n", mmc_hostname(host->mmc));
 492                         sdhci_dumpregs(host);
 493                         cmd->error = MMC_ERR_FAILED;
 494                         tasklet_schedule(&host->finish_tasklet);
 495                         return;
 496                 }
 497                 timeout--;
 498                 mdelay(1);
 499         }
 500
 501         mod_timer(&host->timer, jiffies + 10 * HZ);
 502
 503         host->cmd = cmd;
 504
 505         sdhci_prepare_data(host, cmd->data);
 506
 507         writel(cmd->arg, host->ioaddr + SDHCI_ARGUMENT);
 508
 509         sdhci_set_transfer_mode(host, cmd->data);
 510
 511         if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) {
 512                 printk(KERN_ERR "%s: Unsupported response type! "
 513                         "Please report this to " BUGMAIL ".\n",
 514                         mmc_hostname(host->mmc));
 515                 cmd->error = MMC_ERR_INVALID;
 516                 tasklet_schedule(&host->finish_tasklet);
 517                 return;
 518         }
 519
 520         if (!(cmd->flags & MMC_RSP_PRESENT))
 521                 flags = SDHCI_CMD_RESP_NONE;
 522         else if (cmd->flags & MMC_RSP_136)
 523                 flags = SDHCI_CMD_RESP_LONG;
 524         else if (cmd->flags & MMC_RSP_BUSY)
 525                 flags = SDHCI_CMD_RESP_SHORT_BUSY;
 526         else
 527                 flags = SDHCI_CMD_RESP_SHORT;
 528
 529         if (cmd->flags & MMC_RSP_CRC)
 530                 flags |= SDHCI_CMD_CRC;
 531         if (cmd->flags & MMC_RSP_OPCODE)
 532                 flags |= SDHCI_CMD_INDEX;
 533         if (cmd->data)
 534                 flags |= SDHCI_CMD_DATA;
 535
 536         writel(SDHCI_MAKE_CMD(cmd->opcode, flags),
 537                 host->ioaddr + SDHCI_COMMAND);
 538 }
 539
 540 static void sdhci_finish_command(struct sdhci_host *host)
 541 {
 542         int i;
 543
 544         BUG_ON(host->cmd == NULL);
 545
 546         if (host->cmd->flags & MMC_RSP_PRESENT) {
 547                 if (host->cmd->flags & MMC_RSP_136) {
 548                         /* CRC is stripped so we need to do some shifting. */
 549                         for (i = 0;i < 4;i++) {
 550                                 host->cmd->resp[i] = readl(host->ioaddr +
 551                                         SDHCI_RESPONSE + (3-i)*4) << 8;
 552                                 if (i != 3)
 553                                         host->cmd->resp[i] |=
 554                                                 readb(host->ioaddr +
 555                                                 SDHCI_RESPONSE + (3-i)*4-1);
 556                         }
 557                 } else {
 558                         host->cmd->resp[0] = readl(host->ioaddr + SDHCI_RESPONSE);
 559                 }
 560         }
 561
 562         host->cmd->error = MMC_ERR_NONE;
 563
 564         DBG("Ending cmd (%x)\n", host->cmd->opcode);
 565
 566         if (host->cmd->data)
 567                 host->data = host->cmd->data;
 568         else
 569                 tasklet_schedule(&host->finish_tasklet);
 570
 571         host->cmd = NULL;
 572 }
 573
 574 static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
 575 {
 576         int div;
 577         u16 clk;
 578         unsigned long timeout;
 579
 580         if (clock == host->clock)
 581                 return;
 582
 583         writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL);
 584
 585         if (clock == 0)
 586                 goto out;
 587
 588         for (div = 1;div < 256;div *= 2) {
 589                 if ((host->max_clk / div) <= clock)
 590                         break;
 591         }
 592         div >>= 1;
 593
 594         clk = div << SDHCI_DIVIDER_SHIFT;
 595         clk |= SDHCI_CLOCK_INT_EN;
 596         writew(clk, host->ioaddr + SDHCI_CLOCK_CONTROL);
 597
 598         /* Wait max 10 ms */
 599         timeout = 10;
 600         while (!((clk = readw(host->ioaddr + SDHCI_CLOCK_CONTROL))
 601                 & SDHCI_CLOCK_INT_STABLE)) {
 602                 if (timeout == 0) {
 603                         printk(KERN_ERR "%s: Internal clock never stabilised. "
 604                                 "Please report this to " BUGMAIL ".\n",
 605                                 mmc_hostname(host->mmc));
 606                         sdhci_dumpregs(host);
 607                         return;
 608                 }
 609                 timeout--;
 610                 mdelay(1);
 611         }
 612
 613         clk |= SDHCI_CLOCK_CARD_EN;
 614         writew(clk, host->ioaddr + SDHCI_CLOCK_CONTROL);
 615
 616 out:
 617         host->clock = clock;
 618 }
 619
 620 static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
 621 {
 622         u8 pwr;
 623
 624         if (host->power == power)
 625                 return;
 626
 627         writeb(0, host->ioaddr + SDHCI_POWER_CONTROL);
 628
 629         if (power == (unsigned short)-1)
 630                 goto out;
 631
 632         pwr = SDHCI_POWER_ON;
 633
 634         switch (power) {
 635         case MMC_VDD_170:
 636         case MMC_VDD_180:
 637         case MMC_VDD_190:
 638                 pwr |= SDHCI_POWER_180;
 639                 break;
 640         case MMC_VDD_290:
 641         case MMC_VDD_300:
 642         case MMC_VDD_310:
 643                 pwr |= SDHCI_POWER_300;
 644                 break;
 645         case MMC_VDD_320:
 646         case MMC_VDD_330:
 647         case MMC_VDD_340:
 648                 pwr |= SDHCI_POWER_330;
 649                 break;
 650         default:
 651                 BUG();
 652         }
 653
 654         writeb(pwr, host->ioaddr + SDHCI_POWER_CONTROL);
 655
 656 out:
 657         host->power = power;
 658 }
 659
 660 /*****************************************************************************\
 661  *                                                                           *
 662  * MMC callbacks                                                             *
 663  *                                                                           *
 664 \*****************************************************************************/
 665
 666 static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
 667 {
 668         struct sdhci_host *host;
 669         unsigned long flags;
 670
 671         host = mmc_priv(mmc);
 672
 673         spin_lock_irqsave(&host->lock, flags);
 674
 675         WARN_ON(host->mrq != NULL);
 676
 677         sdhci_activate_led(host);
 678
 679         host->mrq = mrq;
 680
 681         if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
 682                 host->mrq->cmd->error = MMC_ERR_TIMEOUT;
 683                 tasklet_schedule(&host->finish_tasklet);
 684         } else
 685                 sdhci_send_command(host, mrq->cmd);
 686
 687         spin_unlock_irqrestore(&host->lock, flags);
 688 }
 689
 690 static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 691 {
 692         struct sdhci_host *host;
 693         unsigned long flags;
 694         u8 ctrl;
 695
 696         host = mmc_priv(mmc);
 697
 698         spin_lock_irqsave(&host->lock, flags);
 699
 700         /*
 701          * Reset the chip on each power off.
 702          * Should clear out any weird states.
 703          */
 704         if (ios->power_mode == MMC_POWER_OFF) {
 705                 writel(0, host->ioaddr + SDHCI_SIGNAL_ENABLE);
 706                 sdhci_init(host);
 707         }
 708
 709         sdhci_set_clock(host, ios->clock);
 710
 711         if (ios->power_mode == MMC_POWER_OFF)
 712                 sdhci_set_power(host, -1);
 713         else
 714                 sdhci_set_power(host, ios->vdd);
 715
 716         ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
 717         if (ios->bus_width == MMC_BUS_WIDTH_4)
 718                 ctrl |= SDHCI_CTRL_4BITBUS;
 719         else
 720                 ctrl &= ~SDHCI_CTRL_4BITBUS;
 721         writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
 722
 723         spin_unlock_irqrestore(&host->lock, flags);
 724 }
 725
 726 static int sdhci_get_ro(struct mmc_host *mmc)
 727 {
 728         struct sdhci_host *host;
 729         unsigned long flags;
 730         int present;
 731
 732         host = mmc_priv(mmc);
 733
 734         spin_lock_irqsave(&host->lock, flags);
 735
 736         present = readl(host->ioaddr + SDHCI_PRESENT_STATE);
 737
 738         spin_unlock_irqrestore(&host->lock, flags);
 739
 740         return !(present & SDHCI_WRITE_PROTECT);
 741 }
 742
 743 static struct mmc_host_ops sdhci_ops = {
 744         .request        = sdhci_request,
 745         .set_ios        = sdhci_set_ios,
 746         .get_ro         = sdhci_get_ro,
 747 };
 748
 749 /*****************************************************************************\
 750  *                                                                           *
 751  * Tasklets                                                                  *
 752  *                                                                           *
 753 \*****************************************************************************/
 754
 755 static void sdhci_tasklet_card(unsigned long param)
 756 {
 757         struct sdhci_host *host;
 758         unsigned long flags;
 759
 760         host = (struct sdhci_host*)param;
 761
 762         spin_lock_irqsave(&host->lock, flags);
 763
 764         if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
 765                 if (host->mrq) {
 766                         printk(KERN_ERR "%s: Card removed during transfer!\n",
 767                                 mmc_hostname(host->mmc));
 768                         printk(KERN_ERR "%s: Resetting controller.\n",
 769                                 mmc_hostname(host->mmc));
 770
 771                         sdhci_reset(host, SDHCI_RESET_CMD);
 772                         sdhci_reset(host, SDHCI_RESET_DATA);
 773
 774                         host->mrq->cmd->error = MMC_ERR_FAILED;
 775                         tasklet_schedule(&host->finish_tasklet);
 776                 }
 777         }
 778
 779         spin_unlock_irqrestore(&host->lock, flags);
 780
 781         mmc_detect_change(host->mmc, msecs_to_jiffies(500));
 782 }
 783
 784 static void sdhci_tasklet_finish(unsigned long param)
 785 {
 786         struct sdhci_host *host;
 787         unsigned long flags;
 788         struct mmc_request *mrq;
 789
 790         host = (struct sdhci_host*)param;
 791
 792         spin_lock_irqsave(&host->lock, flags);
 793
 794         del_timer(&host->timer);
 795
 796         mrq = host->mrq;
 797
 798         DBG("Ending request, cmd (%x)\n", mrq->cmd->opcode);
 799
 800         /*
 801          * The controller needs a reset of internal state machines
 802          * upon error conditions.
 803          */
 804         if ((mrq->cmd->error != MMC_ERR_NONE) ||
 805                 (mrq->data && ((mrq->data->error != MMC_ERR_NONE) ||
 806                 (mrq->data->stop && (mrq->data->stop->error != MMC_ERR_NONE))))) {
 807                 sdhci_reset(host, SDHCI_RESET_CMD);
 808                 sdhci_reset(host, SDHCI_RESET_DATA);
 809         }
 810
 811         host->mrq = NULL;
 812         host->cmd = NULL;
 813         host->data = NULL;
 814
 815         sdhci_deactivate_led(host);
 816
 817         spin_unlock_irqrestore(&host->lock, flags);
 818
 819         mmc_request_done(host->mmc, mrq);
 820 }
 821
 822 static void sdhci_timeout_timer(unsigned long data)
 823 {
 824         struct sdhci_host *host;
 825         unsigned long flags;
 826
 827         host = (struct sdhci_host*)data;
 828
 829         spin_lock_irqsave(&host->lock, flags);
 830
 831         if (host->mrq) {
 832                 printk(KERN_ERR "%s: Timeout waiting for hardware interrupt. "
 833                         "Please report this to " BUGMAIL ".\n",
 834                         mmc_hostname(host->mmc));
 835                 sdhci_dumpregs(host);
 836
 837                 if (host->data) {
 838                         host->data->error = MMC_ERR_TIMEOUT;
 839                         sdhci_finish_data(host);
 840                 } else {
 841                         if (host->cmd)
 842                                 host->cmd->error = MMC_ERR_TIMEOUT;
 843                         else
 844                                 host->mrq->cmd->error = MMC_ERR_TIMEOUT;
 845
 846                         tasklet_schedule(&host->finish_tasklet);
 847                 }
 848         }
 849
 850         spin_unlock_irqrestore(&host->lock, flags);
 851 }
 852
 853 /*****************************************************************************\
 854  *                                                                           *
 855  * Interrupt handling                                                        *
 856  *                                                                           *
 857 \*****************************************************************************/
 858
 859 static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask)
 860 {
 861         BUG_ON(intmask == 0);
 862
 863         if (!host->cmd) {
 864                 printk(KERN_ERR "%s: Got command interrupt even though no "
 865                         "command operation was in progress.\n",
 866                         mmc_hostname(host->mmc));
 867                 printk(KERN_ERR "%s: Please report this to " BUGMAIL ".\n",
 868                         mmc_hostname(host->mmc));
 869                 sdhci_dumpregs(host);
 870                 return;
 871         }
 872
 873         if (intmask & SDHCI_INT_RESPONSE)
 874                 sdhci_finish_command(host);
 875         else {
 876                 if (intmask & SDHCI_INT_TIMEOUT)
 877                         host->cmd->error = MMC_ERR_TIMEOUT;
 878                 else if (intmask & SDHCI_INT_CRC)
 879                         host->cmd->error = MMC_ERR_BADCRC;
 880                 else if (intmask & (SDHCI_INT_END_BIT | SDHCI_INT_INDEX))
 881                         host->cmd->error = MMC_ERR_FAILED;
 882                 else
 883                         host->cmd->error = MMC_ERR_INVALID;
 884
 885                 tasklet_schedule(&host->finish_tasklet);
 886         }
 887 }
 888
 889 static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
 890 {
 891         BUG_ON(intmask == 0);
 892
 893         if (!host->data) {
 894                 /*
 895                  * A data end interrupt is sent together with the response
 896                  * for the stop command.
 897                  */
 898                 if (intmask & SDHCI_INT_DATA_END)
 899                         return;
 900
 901                 printk(KERN_ERR "%s: Got data interrupt even though no "
 902                         "data operation was in progress.\n",
 903                         mmc_hostname(host->mmc));
 904                 printk(KERN_ERR "%s: Please report this to " BUGMAIL ".\n",
 905                         mmc_hostname(host->mmc));
 906                 sdhci_dumpregs(host);
 907
 908                 return;
 909         }
 910
 911         if (intmask & SDHCI_INT_DATA_TIMEOUT)
 912                 host->data->error = MMC_ERR_TIMEOUT;
 913         else if (intmask & SDHCI_INT_DATA_CRC)
 914                 host->data->error = MMC_ERR_BADCRC;
 915         else if (intmask & SDHCI_INT_DATA_END_BIT)
 916                 host->data->error = MMC_ERR_FAILED;
 917
 918         if (host->data->error != MMC_ERR_NONE)
 919                 sdhci_finish_data(host);
 920         else {
 921                 if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL))
 922                         sdhci_transfer_pio(host);
 923
 924                 if (intmask & SDHCI_INT_DATA_END)
 925                         sdhci_finish_data(host);
 926         }
 927 }
 928
 929 static irqreturn_t sdhci_irq(int irq, void *dev_id, struct pt_regs *regs)
 930 {
 931         irqreturn_t result;
 932         struct sdhci_host* host = dev_id;
 933         u32 intmask;
 934
 935         spin_lock(&host->lock);
 936
 937         intmask = readl(host->ioaddr + SDHCI_INT_STATUS);
 938
 939         if (!intmask) {
 940                 result = IRQ_NONE;
 941                 goto out;
 942         }
 943
 944         DBG("*** %s got interrupt: 0x%08x\n", host->slot_descr, intmask);
 945
 946         if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) {
 947                 writel(intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE),
 948                         host->ioaddr + SDHCI_INT_STATUS);
 949                 tasklet_schedule(&host->card_tasklet);
 950         }
 951
 952         intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE);
 953
 954         if (intmask & SDHCI_INT_CMD_MASK) {
 955                 writel(intmask & SDHCI_INT_CMD_MASK,
 956                         host->ioaddr + SDHCI_INT_STATUS);
 957                 sdhci_cmd_irq(host, intmask & SDHCI_INT_CMD_MASK);
 958         }
 959
 960         if (intmask & SDHCI_INT_DATA_MASK) {
 961                 writel(intmask & SDHCI_INT_DATA_MASK,
 962                         host->ioaddr + SDHCI_INT_STATUS);
 963                 sdhci_data_irq(host, intmask & SDHCI_INT_DATA_MASK);
 964         }
 965
 966         intmask &= ~(SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK);
 967
 968         if (intmask & SDHCI_INT_BUS_POWER) {
 969                 printk(KERN_ERR "%s: Card is consuming too much power!\n",
 970                         mmc_hostname(host->mmc));
 971                 writel(SDHCI_INT_BUS_POWER, host->ioaddr + SDHCI_INT_STATUS);
 972         }
 973
 974         intmask &= SDHCI_INT_BUS_POWER;
 975
 976         if (intmask) {
 977                 printk(KERN_ERR "%s: Unexpected interrupt 0x%08x. Please "
 978                         "report this to " BUGMAIL ".\n",
 979                         mmc_hostname(host->mmc), intmask);
 980                 sdhci_dumpregs(host);
 981
 982                 writel(intmask, host->ioaddr + SDHCI_INT_STATUS);
 983         }
 984
 985         result = IRQ_HANDLED;
 986
 987 out:
 988         spin_unlock(&host->lock);
 989
 990         return result;
 991 }
 992
 993 /*****************************************************************************\
 994  *                                                                           *
 995  * Suspend/resume                                                            *
 996  *                                                                           *
 997 \*****************************************************************************/
 998
 999 #ifdef CONFIG_PM
1000
1001 static int sdhci_suspend (struct pci_dev *pdev, pm_message_t state)
1002 {
1003         struct sdhci_chip *chip;
1004         int i, ret;
1005
1006         chip = pci_get_drvdata(pdev);
1007         if (!chip)
1008                 return 0;
1009
1010         DBG("Suspending...\n");
1011
1012         for (i = 0;i < chip->num_slots;i++) {
1013                 if (!chip->hosts[i])
1014                         continue;
1015                 ret = mmc_suspend_host(chip->hosts[i]->mmc, state);
1016                 if (ret) {
1017                         for (i--;i >= 0;i--)
1018                                 mmc_resume_host(chip->hosts[i]->mmc);
1019                         return ret;
1020                 }
1021         }
1022
1023         pci_save_state(pdev);
1024         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
1025         pci_disable_device(pdev);
1026         pci_set_power_state(pdev, pci_choose_state(pdev, state));
1027
1028         return 0;
1029 }
1030
1031 static int sdhci_resume (struct pci_dev *pdev)
1032 {
1033         struct sdhci_chip *chip;
1034         int i, ret;
1035
1036         chip = pci_get_drvdata(pdev);
1037         if (!chip)
1038                 return 0;
1039
1040         DBG("Resuming...\n");
1041
1042         pci_set_power_state(pdev, PCI_D0);
1043         pci_restore_state(pdev);
1044         pci_enable_device(pdev);
1045
1046         for (i = 0;i < chip->num_slots;i++) {
1047                 if (!chip->hosts[i])
1048                         continue;
1049                 if (chip->hosts[i]->flags & SDHCI_USE_DMA)
1050                         pci_set_master(pdev);
1051                 sdhci_init(chip->hosts[i]);
1052                 ret = mmc_resume_host(chip->hosts[i]->mmc);
1053                 if (ret)
1054                         return ret;
1055         }
1056
1057         return 0;
1058 }
1059
1060 #else /* CONFIG_PM */
1061
1062 #define sdhci_suspend NULL
1063 #define sdhci_resume NULL
1064
1065 #endif /* CONFIG_PM */
1066
1067 /*****************************************************************************\
1068  *                                                                           *
1069  * Device probing/removal                                                    *
1070  *                                                                           *
1071 \*****************************************************************************/
1072
1073 static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
1074 {
1075         int ret;
1076         struct sdhci_chip *chip;
1077         struct mmc_host *mmc;
1078         struct sdhci_host *host;
1079
1080         u8 first_bar;
1081         unsigned int caps;
1082
1083         chip = pci_get_drvdata(pdev);
1084         BUG_ON(!chip);
1085
1086         ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &first_bar);
1087         if (ret)
1088                 return ret;
1089
1090         first_bar &= PCI_SLOT_INFO_FIRST_BAR_MASK;
1091
1092         if (first_bar > 5) {
1093                 printk(KERN_ERR DRIVER_NAME ": Invalid first BAR. Aborting.\n");
1094                 return -ENODEV;
1095         }
1096
1097         if (!(pci_resource_flags(pdev, first_bar + slot) & IORESOURCE_MEM)) {
1098                 printk(KERN_ERR DRIVER_NAME ": BAR is not iomem. Aborting.\n");
1099                 return -ENODEV;
1100         }
1101
1102         if (pci_resource_len(pdev, first_bar + slot) != 0x100) {
1103                 printk(KERN_ERR DRIVER_NAME ": Invalid iomem size. Aborting.\n");
1104                 return -ENODEV;
1105         }
1106
1107         mmc = mmc_alloc_host(sizeof(struct sdhci_host), &pdev->dev);
1108         if (!mmc)
1109                 return -ENOMEM;
1110
1111         host = mmc_priv(mmc);
1112         host->mmc = mmc;
1113
1114         host->bar = first_bar + slot;
1115
1116         host->addr = pci_resource_start(pdev, host->bar);
1117         host->irq = pdev->irq;
1118
1119         DBG("slot %d at 0x%08lx, irq %d\n", slot, host->addr, host->irq);
1120
1121         snprintf(host->slot_descr, 20, "sdhci:slot%d", slot);
1122
1123         ret = pci_request_region(pdev, host->bar, host->slot_descr);
1124         if (ret)
1125                 goto free;
1126
1127         host->ioaddr = ioremap_nocache(host->addr,
1128                 pci_resource_len(pdev, host->bar));
1129         if (!host->ioaddr) {
1130                 ret = -ENOMEM;
1131                 goto release;
1132         }
1133
1134         caps = readl(host->ioaddr + SDHCI_CAPABILITIES);
1135
1136         if ((caps & SDHCI_CAN_DO_DMA) && ((pdev->class & 0x0000FF) == 0x01))
1137                 host->flags |= SDHCI_USE_DMA;
1138
1139         if (host->flags & SDHCI_USE_DMA) {
1140                 if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
1141                         printk(KERN_WARNING "%s: No suitable DMA available. "
1142                                 "Falling back to PIO.\n", host->slot_descr);
1143                         host->flags &= ~SDHCI_USE_DMA;
1144                 }
1145         }
1146
1147         if (host->flags & SDHCI_USE_DMA)
1148                 pci_set_master(pdev);
1149         else /* XXX: Hack to get MMC layer to avoid highmem */
1150                 pdev->dma_mask = 0;
1151
1152         host->max_clk =
1153                 (caps & SDHCI_CLOCK_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT;
1154         if (host->max_clk == 0) {
1155                 printk(KERN_ERR "%s: Hardware doesn't specify base clock "
1156                         "frequency.\n", host->slot_descr);
1157                 ret = -ENODEV;
1158                 goto unmap;
1159         }
1160         host->max_clk *= 1000000;
1161
1162         host->timeout_clk =
1163                 (caps & SDHCI_TIMEOUT_CLK_MASK) >> SDHCI_TIMEOUT_CLK_SHIFT;
1164         if (host->timeout_clk == 0) {
1165                 printk(KERN_ERR "%s: Hardware doesn't specify timeout clock "
1166                         "frequency.\n", host->slot_descr);
1167                 ret = -ENODEV;
1168                 goto unmap;
1169         }
1170         if (caps & SDHCI_TIMEOUT_CLK_UNIT)
1171                 host->timeout_clk *= 1000;
1172
1173         host->max_block = (caps & SDHCI_MAX_BLOCK_MASK) >> SDHCI_MAX_BLOCK_SHIFT;
1174         if (host->max_block >= 3) {
1175                 printk(KERN_ERR "%s: Invalid maximum block size.\n",
1176                         host->slot_descr);
1177                 ret = -ENODEV;
1178                 goto unmap;
1179         }
1180         host->max_block = 512 << host->max_block;
1181
1182         /*
1183          * Set host parameters.
1184          */
1185         mmc->ops = &sdhci_ops;
1186         mmc->f_min = host->max_clk / 256;
1187         mmc->f_max = host->max_clk;
1188         mmc->caps = MMC_CAP_4_BIT_DATA;
1189
1190         mmc->ocr_avail = 0;
1191         if (caps & SDHCI_CAN_VDD_330)
1192                 mmc->ocr_avail |= MMC_VDD_32_33|MMC_VDD_33_34;
1193         else if (caps & SDHCI_CAN_VDD_300)
1194                 mmc->ocr_avail |= MMC_VDD_29_30|MMC_VDD_30_31;
1195         else if (caps & SDHCI_CAN_VDD_180)
1196                 mmc->ocr_avail |= MMC_VDD_17_18|MMC_VDD_18_19;
1197
1198         if (mmc->ocr_avail == 0) {
1199                 printk(KERN_ERR "%s: Hardware doesn't report any "
1200                         "support voltages.\n", host->slot_descr);
1201                 ret = -ENODEV;
1202                 goto unmap;
1203         }
1204
1205         spin_lock_init(&host->lock);
1206
1207         /*
1208          * Maximum number of segments. Hardware cannot do scatter lists.
1209          */
1210         if (host->flags & SDHCI_USE_DMA)
1211                 mmc->max_hw_segs = 1;
1212         else
1213                 mmc->max_hw_segs = 16;
1214         mmc->max_phys_segs = 16;
1215
1216         /*
1217          * Maximum number of sectors in one transfer. Limited by DMA boundary
1218          * size (512KiB), which means (512 KiB/512=) 1024 entries.
1219          */
1220         mmc->max_sectors = 1024;
1221
1222         /*
1223          * Maximum segment size. Could be one segment with the maximum number
1224          * of sectors.
1225          */
1226         mmc->max_seg_size = mmc->max_sectors * 512;
1227
1228         /*
1229          * Init tasklets.
1230          */
1231         tasklet_init(&host->card_tasklet,
1232                 sdhci_tasklet_card, (unsigned long)host);
1233         tasklet_init(&host->finish_tasklet,
1234                 sdhci_tasklet_finish, (unsigned long)host);
1235
1236         setup_timer(&host->timer, sdhci_timeout_timer, (long)host);
1237
1238         ret = request_irq(host->irq, sdhci_irq, SA_SHIRQ,
1239                 host->slot_descr, host);
1240         if (ret)
1241                 goto untasklet;
1242
1243         sdhci_init(host);
1244
1245 #ifdef CONFIG_MMC_DEBUG
1246         sdhci_dumpregs(host);
1247 #endif
1248
1249         host->chip = chip;
1250         chip->hosts[slot] = host;
1251
1252         mmc_add_host(mmc);
1253
1254         printk(KERN_INFO "%s: SDHCI at 0x%08lx irq %d %s\n", mmc_hostname(mmc),
1255                 host->addr, host->irq,
1256                 (host->flags & SDHCI_USE_DMA)?"DMA":"PIO");
1257
1258         return 0;
1259
1260 untasklet:
1261         tasklet_kill(&host->card_tasklet);
1262         tasklet_kill(&host->finish_tasklet);
1263 unmap:
1264         iounmap(host->ioaddr);
1265 release:
1266         pci_release_region(pdev, host->bar);
1267 free:
1268         mmc_free_host(mmc);
1269
1270         return ret;
1271 }
1272
1273 static void sdhci_remove_slot(struct pci_dev *pdev, int slot)
1274 {
1275         struct sdhci_chip *chip;
1276         struct mmc_host *mmc;
1277         struct sdhci_host *host;
1278
1279         chip = pci_get_drvdata(pdev);
1280         host = chip->hosts[slot];
1281         mmc = host->mmc;
1282
1283         chip->hosts[slot] = NULL;
1284
1285         mmc_remove_host(mmc);
1286
1287         sdhci_reset(host, SDHCI_RESET_ALL);
1288
1289         free_irq(host->irq, host);
1290
1291         del_timer_sync(&host->timer);
1292
1293         tasklet_kill(&host->card_tasklet);
1294         tasklet_kill(&host->finish_tasklet);
1295
1296         iounmap(host->ioaddr);
1297
1298         pci_release_region(pdev, host->bar);
1299
1300         mmc_free_host(mmc);
1301 }
1302
1303 static int __devinit sdhci_probe(struct pci_dev *pdev,
1304         const struct pci_device_id *ent)
1305 {
1306         int ret, i;
1307         u8 slots, rev;
1308         struct sdhci_chip *chip;
1309
1310         BUG_ON(pdev == NULL);
1311         BUG_ON(ent == NULL);
1312
1313         pci_read_config_byte(pdev, PCI_CLASS_REVISION, &rev);
1314
1315         printk(KERN_INFO DRIVER_NAME
1316                 ": SDHCI controller found at %s [%04x:%04x] (rev %x)\n",
1317                 pci_name(pdev), (int)pdev->vendor, (int)pdev->device,
1318                 (int)rev);
1319
1320         ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &slots);
1321         if (ret)
1322                 return ret;
1323
1324         slots = PCI_SLOT_INFO_SLOTS(slots) + 1;
1325         DBG("found %d slot(s)\n", slots);
1326         if (slots == 0)
1327                 return -ENODEV;
1328
1329         ret = pci_enable_device(pdev);
1330         if (ret)
1331                 return ret;
1332
1333         chip = kzalloc(sizeof(struct sdhci_chip) +
1334                 sizeof(struct sdhci_host*) * slots, GFP_KERNEL);
1335         if (!chip) {
1336                 ret = -ENOMEM;
1337                 goto err;
1338         }
1339
1340         chip->pdev = pdev;
1341
1342         chip->num_slots = slots;
1343         pci_set_drvdata(pdev, chip);
1344
1345         for (i = 0;i < slots;i++) {
1346                 ret = sdhci_probe_slot(pdev, i);
1347                 if (ret) {
1348                         for (i--;i >= 0;i--)
1349                                 sdhci_remove_slot(pdev, i);
1350                         goto free;
1351                 }
1352         }
1353
1354         return 0;
1355
1356 free:
1357         pci_set_drvdata(pdev, NULL);
1358         kfree(chip);
1359
1360 err:
1361         pci_disable_device(pdev);
1362         return ret;
1363 }
1364
1365 static void __devexit sdhci_remove(struct pci_dev *pdev)
1366 {
1367         int i;
1368         struct sdhci_chip *chip;
1369
1370         chip = pci_get_drvdata(pdev);
1371
1372         if (chip) {
1373                 for (i = 0;i < chip->num_slots;i++)
1374                         sdhci_remove_slot(pdev, i);
1375
1376                 pci_set_drvdata(pdev, NULL);
1377
1378                 kfree(chip);
1379         }
1380
1381         pci_disable_device(pdev);
1382 }
1383
1384 static struct pci_driver sdhci_driver = {
1385         .name =         DRIVER_NAME,
1386         .id_table =     pci_ids,
1387         .probe =        sdhci_probe,
1388         .remove =       __devexit_p(sdhci_remove),
1389         .suspend =      sdhci_suspend,
1390         .resume =       sdhci_resume,
1391 };
1392
1393 /*****************************************************************************\
1394  *                                                                           *
1395  * Driver init/exit                                                          *
1396  *                                                                           *
1397 \*****************************************************************************/
1398
1399 static int __init sdhci_drv_init(void)
1400 {
1401         printk(KERN_INFO DRIVER_NAME
1402                 ": Secure Digital Host Controller Interface driver, "
1403                 DRIVER_VERSION "\n");
1404         printk(KERN_INFO DRIVER_NAME ": Copyright(c) Pierre Ossman\n");
1405
1406         return pci_register_driver(&sdhci_driver);
1407 }
1408
1409 static void __exit sdhci_drv_exit(void)
1410 {
1411         DBG("Exiting\n");
1412
1413         pci_unregister_driver(&sdhci_driver);
1414 }
1415
1416 module_init(sdhci_drv_init);
1417 module_exit(sdhci_drv_exit);
1418
1419 MODULE_AUTHOR("Pierre Ossman <drzeus@drzeus.cx>");
1420 MODULE_DESCRIPTION("Secure Digital Host Controller Interface driver");
1421 MODULE_VERSION(DRIVER_VERSION);
1422 MODULE_LICENSE("GPL");