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  /*
  12   * Note that PIO transfer is rather crappy atm. The buffer full/empty
  13   * interrupts aren't reliable so we currently transfer the entire buffer
  14   * directly. Patches to solve the problem are welcome.
  15   */
  16
  17 #include <linux/delay.h>
  18 #include <linux/highmem.h>
  19 #include <linux/pci.h>
  20 #include <linux/dma-mapping.h>
  21
  22 #include <linux/mmc/host.h>
  23 #include <linux/mmc/protocol.h>
  24
  25 #include <asm/scatterlist.h>
  26
  27 #include "sdhci.h"
  28
  29 #define DRIVER_NAME "sdhci"
  30 #define DRIVER_VERSION "0.11"
  31
  32 #define BUGMAIL "<sdhci-devel@list.drzeus.cx>"
  33
  34 #define DBG(f, x...) \
  35         pr_debug(DRIVER_NAME " [%s()]: " f, __func__,## x)
  36
  37 static const struct pci_device_id pci_ids[] __devinitdata = {
  38         /* handle any SD host controller */
  39         {PCI_DEVICE_CLASS((PCI_CLASS_SYSTEM_SDHCI << 8), 0xFFFF00)},
  40         { /* end: all zeroes */ },
  41 };
  42
  43 MODULE_DEVICE_TABLE(pci, pci_ids);
  44
  45 static void sdhci_prepare_data(struct sdhci_host *, struct mmc_data *);
  46 static void sdhci_finish_data(struct sdhci_host *);
  47
  48 static void sdhci_send_command(struct sdhci_host *, struct mmc_command *);
  49 static void sdhci_finish_command(struct sdhci_host *);
  50
  51 static void sdhci_dumpregs(struct sdhci_host *host)
  52 {
  53         printk(KERN_DEBUG DRIVER_NAME ": ============== REGISTER DUMP ==============\n");
  54
  55         printk(KERN_DEBUG DRIVER_NAME ": Sys addr: 0x%08x | Version:  0x%08x\n",
  56                 readl(host->ioaddr + SDHCI_DMA_ADDRESS),
  57                 readw(host->ioaddr + SDHCI_HOST_VERSION));
  58         printk(KERN_DEBUG DRIVER_NAME ": Blk size: 0x%08x | Blk cnt:  0x%08x\n",
  59                 readw(host->ioaddr + SDHCI_BLOCK_SIZE),
  60                 readw(host->ioaddr + SDHCI_BLOCK_COUNT));
  61         printk(KERN_DEBUG DRIVER_NAME ": Argument: 0x%08x | Trn mode: 0x%08x\n",
  62                 readl(host->ioaddr + SDHCI_ARGUMENT),
  63                 readw(host->ioaddr + SDHCI_TRANSFER_MODE));
  64         printk(KERN_DEBUG DRIVER_NAME ": Present:  0x%08x | Host ctl: 0x%08x\n",
  65                 readl(host->ioaddr + SDHCI_PRESENT_STATE),
  66                 readb(host->ioaddr + SDHCI_HOST_CONTROL));
  67         printk(KERN_DEBUG DRIVER_NAME ": Power:    0x%08x | Blk gap:  0x%08x\n",
  68                 readb(host->ioaddr + SDHCI_POWER_CONTROL),
  69                 readb(host->ioaddr + SDHCI_BLOCK_GAP_CONTROL));
  70         printk(KERN_DEBUG DRIVER_NAME ": Wake-up:  0x%08x | Clock:    0x%08x\n",
  71                 readb(host->ioaddr + SDHCI_WALK_UP_CONTROL),
  72                 readw(host->ioaddr + SDHCI_CLOCK_CONTROL));
  73         printk(KERN_DEBUG DRIVER_NAME ": Timeout:  0x%08x | Int stat: 0x%08x\n",
  74                 readb(host->ioaddr + SDHCI_TIMEOUT_CONTROL),
  75                 readl(host->ioaddr + SDHCI_INT_STATUS));
  76         printk(KERN_DEBUG DRIVER_NAME ": Int enab: 0x%08x | Sig enab: 0x%08x\n",
  77                 readl(host->ioaddr + SDHCI_INT_ENABLE),
  78                 readl(host->ioaddr + SDHCI_SIGNAL_ENABLE));
  79         printk(KERN_DEBUG DRIVER_NAME ": AC12 err: 0x%08x | Slot int: 0x%08x\n",
  80                 readw(host->ioaddr + SDHCI_ACMD12_ERR),
  81                 readw(host->ioaddr + SDHCI_SLOT_INT_STATUS));
  82         printk(KERN_DEBUG DRIVER_NAME ": Caps:     0x%08x | Max curr: 0x%08x\n",
  83                 readl(host->ioaddr + SDHCI_CAPABILITIES),
  84                 readl(host->ioaddr + SDHCI_MAX_CURRENT));
  85
  86         printk(KERN_DEBUG DRIVER_NAME ": ===========================================\n");
  87 }
  88
  89 /*****************************************************************************\
  90  *                                                                           *
  91  * Low level functions                                                       *
  92  *                                                                           *
  93 \*****************************************************************************/
  94
  95 static void sdhci_reset(struct sdhci_host *host, u8 mask)
  96 {
  97         unsigned long timeout;
  98
  99         writeb(mask, host->ioaddr + SDHCI_SOFTWARE_RESET);
 100
 101         if (mask & SDHCI_RESET_ALL)
 102                 host->clock = 0;
 103
 104         /* Wait max 100 ms */
 105         timeout = 100;
 106
 107         /* hw clears the bit when it's done */
 108         while (readb(host->ioaddr + SDHCI_SOFTWARE_RESET) & mask) {
 109                 if (timeout == 0) {
 110                         printk(KERN_ERR "%s: Reset 0x%x never completed. "
 111                                 "Please report this to " BUGMAIL ".\n",
 112                                 mmc_hostname(host->mmc), (int)mask);
 113                         sdhci_dumpregs(host);
 114                         return;
 115                 }
 116                 timeout--;
 117                 mdelay(1);
 118         }
 119 }
 120
 121 static void sdhci_init(struct sdhci_host *host)
 122 {
 123         u32 intmask;
 124
 125         sdhci_reset(host, SDHCI_RESET_ALL);
 126
 127         intmask = ~(SDHCI_INT_CARD_INT | SDHCI_INT_BUF_EMPTY | SDHCI_INT_BUF_FULL);
 128
 129         writel(intmask, host->ioaddr + SDHCI_INT_ENABLE);
 130         writel(intmask, host->ioaddr + SDHCI_SIGNAL_ENABLE);
 131 }
 132
 133 static void sdhci_activate_led(struct sdhci_host *host)
 134 {
 135         u8 ctrl;
 136
 137         ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
 138         ctrl |= SDHCI_CTRL_LED;
 139         writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
 140 }
 141
 142 static void sdhci_deactivate_led(struct sdhci_host *host)
 143 {
 144         u8 ctrl;
 145
 146         ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
 147         ctrl &= ~SDHCI_CTRL_LED;
 148         writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
 149 }
 150
 151 /*****************************************************************************\
 152  *                                                                           *
 153  * Core functions                                                            *
 154  *                                                                           *
 155 \*****************************************************************************/
 156
 157 static inline char* sdhci_kmap_sg(struct sdhci_host* host)
 158 {
 159         host->mapped_sg = kmap_atomic(host->cur_sg->page, KM_BIO_SRC_IRQ);
 160         return host->mapped_sg + host->cur_sg->offset;
 161 }
 162
 163 static inline void sdhci_kunmap_sg(struct sdhci_host* host)
 164 {
 165         kunmap_atomic(host->mapped_sg, KM_BIO_SRC_IRQ);
 166 }
 167
 168 static inline int sdhci_next_sg(struct sdhci_host* host)
 169 {
 170         /*
 171          * Skip to next SG entry.
 172          */
 173         host->cur_sg++;
 174         host->num_sg--;
 175
 176         /*
 177          * Any entries left?
 178          */
 179         if (host->num_sg > 0) {
 180                 host->offset = 0;
 181                 host->remain = host->cur_sg->length;
 182         }
 183
 184         return host->num_sg;
 185 }
 186
 187 static void sdhci_transfer_pio(struct sdhci_host *host)
 188 {
 189         char *buffer;
 190         u32 mask;
 191         int bytes, size;
 192         unsigned long max_jiffies;
 193
 194         BUG_ON(!host->data);
 195
 196         if (host->num_sg == 0)
 197                 return;
 198
 199         bytes = 0;
 200         if (host->data->flags & MMC_DATA_READ)
 201                 mask = SDHCI_DATA_AVAILABLE;
 202         else
 203                 mask = SDHCI_SPACE_AVAILABLE;
 204
 205         buffer = sdhci_kmap_sg(host) + host->offset;
 206
 207         /* Transfer shouldn't take more than 5 s */
 208         max_jiffies = jiffies + HZ * 5;
 209
 210         while (host->size > 0) {
 211                 if (time_after(jiffies, max_jiffies)) {
 212                         printk(KERN_ERR "%s: PIO transfer stalled. "
 213                                 "Please report this to "
 214                                 BUGMAIL ".\n", mmc_hostname(host->mmc));
 215                         sdhci_dumpregs(host);
 216
 217                         sdhci_kunmap_sg(host);
 218
 219                         host->data->error = MMC_ERR_FAILED;
 220                         sdhci_finish_data(host);
 221                         return;
 222                 }
 223
 224                 if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) & mask))
 225                         continue;
 226
 227                 size = min(host->size, host->remain);
 228
 229                 if (size >= 4) {
 230                         if (host->data->flags & MMC_DATA_READ)
 231                                 *(u32*)buffer = readl(host->ioaddr + SDHCI_BUFFER);
 232                         else
 233                                 writel(*(u32*)buffer, host->ioaddr + SDHCI_BUFFER);
 234                         size = 4;
 235                 } else if (size >= 2) {
 236                         if (host->data->flags & MMC_DATA_READ)
 237                                 *(u16*)buffer = readw(host->ioaddr + SDHCI_BUFFER);
 238                         else
 239                                 writew(*(u16*)buffer, host->ioaddr + SDHCI_BUFFER);
 240                         size = 2;
 241                 } else {
 242                         if (host->data->flags & MMC_DATA_READ)
 243                                 *(u8*)buffer = readb(host->ioaddr + SDHCI_BUFFER);
 244                         else
 245                                 writeb(*(u8*)buffer, host->ioaddr + SDHCI_BUFFER);
 246                         size = 1;
 247                 }
 248
 249                 buffer += size;
 250                 host->offset += size;
 251                 host->remain -= size;
 252
 253                 bytes += size;
 254                 host->size -= size;
 255
 256                 if (host->remain == 0) {
 257                         sdhci_kunmap_sg(host);
 258                         if (sdhci_next_sg(host) == 0) {
 259                                 DBG("PIO transfer: %d bytes\n", bytes);
 260                                 return;
 261                         }
 262                         buffer = sdhci_kmap_sg(host);
 263                 }
 264         }
 265
 266         sdhci_kunmap_sg(host);
 267
 268         DBG("PIO transfer: %d bytes\n", bytes);
 269 }
 270
 271 static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_data *data)
 272 {
 273         u16 mode;
 274         u8 count;
 275         unsigned target_timeout, current_timeout;
 276
 277         WARN_ON(host->data);
 278
 279         if (data == NULL) {
 280                 writew(0, host->ioaddr + SDHCI_TRANSFER_MODE);
 281                 return;
 282         }
 283
 284         DBG("blksz %04x blks %04x flags %08x\n",
 285                 data->blksz, data->blocks, data->flags);
 286         DBG("tsac %d ms nsac %d clk\n",
 287                 data->timeout_ns / 1000000, data->timeout_clks);
 288
 289         /* timeout in us */
 290         target_timeout = data->timeout_ns / 1000 +
 291                 data->timeout_clks / host->clock;
 292
 293         /*
 294          * Figure out needed cycles.
 295          * We do this in steps in order to fit inside a 32 bit int.
 296          * The first step is the minimum timeout, which will have a
 297          * minimum resolution of 6 bits:
 298          * (1) 2^13*1000 > 2^22,
 299          * (2) host->timeout_clk < 2^16
 300          *     =>
 301          *     (1) / (2) > 2^6
 302          */
 303         count = 0;
 304         current_timeout = (1 << 13) * 1000 / host->timeout_clk;
 305         while (current_timeout < target_timeout) {
 306                 count++;
 307                 current_timeout <<= 1;
 308                 if (count >= 0xF)
 309                         break;
 310         }
 311
 312         if (count >= 0xF) {
 313                 printk(KERN_WARNING "%s: Too large timeout requested!\n",
 314                         mmc_hostname(host->mmc));
 315                 count = 0xE;
 316         }
 317
 318         writeb(count, host->ioaddr + SDHCI_TIMEOUT_CONTROL);
 319
 320         mode = SDHCI_TRNS_BLK_CNT_EN;
 321         if (data->blocks > 1)
 322                 mode |= SDHCI_TRNS_MULTI;
 323         if (data->flags & MMC_DATA_READ)
 324                 mode |= SDHCI_TRNS_READ;
 325         if (host->flags & SDHCI_USE_DMA)
 326                 mode |= SDHCI_TRNS_DMA;
 327
 328         writew(mode, host->ioaddr + SDHCI_TRANSFER_MODE);
 329
 330         writew(data->blksz, host->ioaddr + SDHCI_BLOCK_SIZE);
 331         writew(data->blocks, host->ioaddr + SDHCI_BLOCK_COUNT);
 332
 333         if (host->flags & SDHCI_USE_DMA) {
 334                 int count;
 335
 336                 count = pci_map_sg(host->chip->pdev, data->sg, data->sg_len,
 337                         (data->flags & MMC_DATA_READ)?PCI_DMA_FROMDEVICE:PCI_DMA_TODEVICE);
 338                 BUG_ON(count != 1);
 339
 340                 writel(sg_dma_address(data->sg), host->ioaddr + SDHCI_DMA_ADDRESS);
 341         } else {
 342                 host->size = data->blksz * data->blocks;
 343
 344                 host->cur_sg = data->sg;
 345                 host->num_sg = data->sg_len;
 346
 347                 host->offset = 0;
 348                 host->remain = host->cur_sg->length;
 349         }
 350 }
 351
 352 static void sdhci_finish_data(struct sdhci_host *host)
 353 {
 354         struct mmc_data *data;
 355         u32 intmask;
 356         u16 blocks;
 357
 358         BUG_ON(!host->data);
 359
 360         data = host->data;
 361         host->data = NULL;
 362
 363         if (host->flags & SDHCI_USE_DMA) {
 364                 pci_unmap_sg(host->chip->pdev, data->sg, data->sg_len,
 365                         (data->flags & MMC_DATA_READ)?PCI_DMA_FROMDEVICE:PCI_DMA_TODEVICE);
 366         } else {
 367                 intmask = readl(host->ioaddr + SDHCI_SIGNAL_ENABLE);
 368                 intmask &= ~(SDHCI_INT_BUF_EMPTY | SDHCI_INT_BUF_FULL);
 369                 writel(intmask, host->ioaddr + SDHCI_SIGNAL_ENABLE);
 370
 371                 intmask = readl(host->ioaddr + SDHCI_INT_ENABLE);
 372                 intmask &= ~(SDHCI_INT_BUF_EMPTY | SDHCI_INT_BUF_FULL);
 373                 writel(intmask, host->ioaddr + SDHCI_INT_ENABLE);
 374         }
 375
 376         /*
 377          * Controller doesn't count down when in single block mode.
 378          */
 379         if ((data->blocks == 1) && (data->error == MMC_ERR_NONE))
 380                 blocks = 0;
 381         else
 382                 blocks = readw(host->ioaddr + SDHCI_BLOCK_COUNT);
 383         data->bytes_xfered = data->blksz * (data->blocks - blocks);
 384
 385         if ((data->error == MMC_ERR_NONE) && blocks) {
 386                 printk(KERN_ERR "%s: Controller signalled completion even "
 387                         "though there were blocks left. Please report this "
 388                         "to " BUGMAIL ".\n", mmc_hostname(host->mmc));
 389                 data->error = MMC_ERR_FAILED;
 390         }
 391
 392         if (host->size != 0) {
 393                 printk(KERN_ERR "%s: %d bytes were left untransferred. "
 394                         "Please report this to " BUGMAIL ".\n",
 395                         mmc_hostname(host->mmc), host->size);
 396                 data->error = MMC_ERR_FAILED;
 397         }
 398
 399         DBG("Ending data transfer (%d bytes)\n", data->bytes_xfered);
 400
 401         if (data->stop) {
 402                 /*
 403                  * The controller needs a reset of internal state machines
 404                  * upon error conditions.
 405                  */
 406                 if (data->error != MMC_ERR_NONE) {
 407                         sdhci_reset(host, SDHCI_RESET_CMD);
 408                         sdhci_reset(host, SDHCI_RESET_DATA);
 409                 }
 410
 411                 sdhci_send_command(host, data->stop);
 412         } else
 413                 tasklet_schedule(&host->finish_tasklet);
 414 }
 415
 416 static void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
 417 {
 418         int flags;
 419         unsigned long timeout;
 420
 421         WARN_ON(host->cmd);
 422
 423         DBG("Sending cmd (%x)\n", cmd->opcode);
 424
 425         /* Wait max 10 ms */
 426         timeout = 10;
 427         while (readl(host->ioaddr + SDHCI_PRESENT_STATE) &
 428                 (SDHCI_CMD_INHIBIT | SDHCI_DATA_INHIBIT)) {
 429                 if (timeout == 0) {
 430                         printk(KERN_ERR "%s: Controller never released "
 431                                 "inhibit bits. Please report this to "
 432                                 BUGMAIL ".\n", mmc_hostname(host->mmc));
 433                         sdhci_dumpregs(host);
 434                         cmd->error = MMC_ERR_FAILED;
 435                         tasklet_schedule(&host->finish_tasklet);
 436                         return;
 437                 }
 438                 timeout--;
 439                 mdelay(1);
 440         }
 441
 442         mod_timer(&host->timer, jiffies + 10 * HZ);
 443
 444         host->cmd = cmd;
 445
 446         sdhci_prepare_data(host, cmd->data);
 447
 448         writel(cmd->arg, host->ioaddr + SDHCI_ARGUMENT);
 449
 450         if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) {
 451                 printk(KERN_ERR "%s: Unsupported response type! "
 452                         "Please report this to " BUGMAIL ".\n",
 453                         mmc_hostname(host->mmc));
 454                 cmd->error = MMC_ERR_INVALID;
 455                 tasklet_schedule(&host->finish_tasklet);
 456                 return;
 457         }
 458
 459         if (!(cmd->flags & MMC_RSP_PRESENT))
 460                 flags = SDHCI_CMD_RESP_NONE;
 461         else if (cmd->flags & MMC_RSP_136)
 462                 flags = SDHCI_CMD_RESP_LONG;
 463         else if (cmd->flags & MMC_RSP_BUSY)
 464                 flags = SDHCI_CMD_RESP_SHORT_BUSY;
 465         else
 466                 flags = SDHCI_CMD_RESP_SHORT;
 467
 468         if (cmd->flags & MMC_RSP_CRC)
 469                 flags |= SDHCI_CMD_CRC;
 470         if (cmd->flags & MMC_RSP_OPCODE)
 471                 flags |= SDHCI_CMD_INDEX;
 472         if (cmd->data)
 473                 flags |= SDHCI_CMD_DATA;
 474
 475         writel(SDHCI_MAKE_CMD(cmd->opcode, flags),
 476                 host->ioaddr + SDHCI_COMMAND);
 477 }
 478
 479 static void sdhci_finish_command(struct sdhci_host *host)
 480 {
 481         int i;
 482
 483         BUG_ON(host->cmd == NULL);
 484
 485         if (host->cmd->flags & MMC_RSP_PRESENT) {
 486                 if (host->cmd->flags & MMC_RSP_136) {
 487                         /* CRC is stripped so we need to do some shifting. */
 488                         for (i = 0;i < 4;i++) {
 489                                 host->cmd->resp[i] = readl(host->ioaddr +
 490                                         SDHCI_RESPONSE + (3-i)*4) << 8;
 491                                 if (i != 3)
 492                                         host->cmd->resp[i] |=
 493                                                 readb(host->ioaddr +
 494                                                 SDHCI_RESPONSE + (3-i)*4-1);
 495                         }
 496                 } else {
 497                         host->cmd->resp[0] = readl(host->ioaddr + SDHCI_RESPONSE);
 498                 }
 499         }
 500
 501         host->cmd->error = MMC_ERR_NONE;
 502
 503         DBG("Ending cmd (%x)\n", host->cmd->opcode);
 504
 505         if (host->cmd->data) {
 506                 u32 intmask;
 507
 508                 host->data = host->cmd->data;
 509
 510                 if (!(host->flags & SDHCI_USE_DMA)) {
 511                         /*
 512                          * Don't enable the interrupts until now to make sure we
 513                          * get stable handling of the FIFO.
 514                          */
 515                         intmask = readl(host->ioaddr + SDHCI_INT_ENABLE);
 516                         intmask |= SDHCI_INT_BUF_EMPTY | SDHCI_INT_BUF_FULL;
 517                         writel(intmask, host->ioaddr + SDHCI_INT_ENABLE);
 518
 519                         intmask = readl(host->ioaddr + SDHCI_SIGNAL_ENABLE);
 520                         intmask |= SDHCI_INT_BUF_EMPTY | SDHCI_INT_BUF_FULL;
 521                         writel(intmask, host->ioaddr + SDHCI_SIGNAL_ENABLE);
 522
 523                         /*
 524                          * The buffer interrupts are to unreliable so we
 525                          * start the transfer immediatly.
 526                          */
 527                         sdhci_transfer_pio(host);
 528                 }
 529         } else
 530                 tasklet_schedule(&host->finish_tasklet);
 531
 532         host->cmd = NULL;
 533 }
 534
 535 static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
 536 {
 537         int div;
 538         u16 clk;
 539         unsigned long timeout;
 540
 541         if (clock == host->clock)
 542                 return;
 543
 544         writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL);
 545
 546         if (clock == 0)
 547                 goto out;
 548
 549         for (div = 1;div < 256;div *= 2) {
 550                 if ((host->max_clk / div) <= clock)
 551                         break;
 552         }
 553         div >>= 1;
 554
 555         clk = div << SDHCI_DIVIDER_SHIFT;
 556         clk |= SDHCI_CLOCK_INT_EN;
 557         writew(clk, host->ioaddr + SDHCI_CLOCK_CONTROL);
 558
 559         /* Wait max 10 ms */
 560         timeout = 10;
 561         while (!((clk = readw(host->ioaddr + SDHCI_CLOCK_CONTROL))
 562                 & SDHCI_CLOCK_INT_STABLE)) {
 563                 if (timeout == 0) {
 564                         printk(KERN_ERR "%s: Internal clock never stabilised. "
 565                                 "Please report this to " BUGMAIL ".\n",
 566                                 mmc_hostname(host->mmc));
 567                         sdhci_dumpregs(host);
 568                         return;
 569                 }
 570                 timeout--;
 571                 mdelay(1);
 572         }
 573
 574         clk |= SDHCI_CLOCK_CARD_EN;
 575         writew(clk, host->ioaddr + SDHCI_CLOCK_CONTROL);
 576
 577 out:
 578         host->clock = clock;
 579 }
 580
 581 static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
 582 {
 583         u8 pwr;
 584
 585         if (host->power == power)
 586                 return;
 587
 588         writeb(0, host->ioaddr + SDHCI_POWER_CONTROL);
 589
 590         if (power == (unsigned short)-1)
 591                 goto out;
 592
 593         pwr = SDHCI_POWER_ON;
 594
 595         switch (power) {
 596         case MMC_VDD_170:
 597         case MMC_VDD_180:
 598         case MMC_VDD_190:
 599                 pwr |= SDHCI_POWER_180;
 600                 break;
 601         case MMC_VDD_290:
 602         case MMC_VDD_300:
 603         case MMC_VDD_310:
 604                 pwr |= SDHCI_POWER_300;
 605                 break;
 606         case MMC_VDD_320:
 607         case MMC_VDD_330:
 608         case MMC_VDD_340:
 609                 pwr |= SDHCI_POWER_330;
 610                 break;
 611         default:
 612                 BUG();
 613         }
 614
 615         writeb(pwr, host->ioaddr + SDHCI_POWER_CONTROL);
 616
 617 out:
 618         host->power = power;
 619 }
 620
 621 /*****************************************************************************\
 622  *                                                                           *
 623  * MMC callbacks                                                             *
 624  *                                                                           *
 625 \*****************************************************************************/
 626
 627 static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
 628 {
 629         struct sdhci_host *host;
 630         unsigned long flags;
 631
 632         host = mmc_priv(mmc);
 633
 634         spin_lock_irqsave(&host->lock, flags);
 635
 636         WARN_ON(host->mrq != NULL);
 637
 638         sdhci_activate_led(host);
 639
 640         host->mrq = mrq;
 641
 642         if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
 643                 host->mrq->cmd->error = MMC_ERR_TIMEOUT;
 644                 tasklet_schedule(&host->finish_tasklet);
 645         } else
 646                 sdhci_send_command(host, mrq->cmd);
 647
 648         spin_unlock_irqrestore(&host->lock, flags);
 649 }
 650
 651 static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 652 {
 653         struct sdhci_host *host;
 654         unsigned long flags;
 655         u8 ctrl;
 656
 657         host = mmc_priv(mmc);
 658
 659         spin_lock_irqsave(&host->lock, flags);
 660
 661         /*
 662          * Reset the chip on each power off.
 663          * Should clear out any weird states.
 664          */
 665         if (ios->power_mode == MMC_POWER_OFF) {
 666                 writel(0, host->ioaddr + SDHCI_SIGNAL_ENABLE);
 667                 sdhci_init(host);
 668         }
 669
 670         sdhci_set_clock(host, ios->clock);
 671
 672         if (ios->power_mode == MMC_POWER_OFF)
 673                 sdhci_set_power(host, -1);
 674         else
 675                 sdhci_set_power(host, ios->vdd);
 676
 677         ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
 678         if (ios->bus_width == MMC_BUS_WIDTH_4)
 679                 ctrl |= SDHCI_CTRL_4BITBUS;
 680         else
 681                 ctrl &= ~SDHCI_CTRL_4BITBUS;
 682         writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
 683
 684         spin_unlock_irqrestore(&host->lock, flags);
 685 }
 686
 687 static int sdhci_get_ro(struct mmc_host *mmc)
 688 {
 689         struct sdhci_host *host;
 690         unsigned long flags;
 691         int present;
 692
 693         host = mmc_priv(mmc);
 694
 695         spin_lock_irqsave(&host->lock, flags);
 696
 697         present = readl(host->ioaddr + SDHCI_PRESENT_STATE);
 698
 699         spin_unlock_irqrestore(&host->lock, flags);
 700
 701         return !(present & SDHCI_WRITE_PROTECT);
 702 }
 703
 704 static struct mmc_host_ops sdhci_ops = {
 705         .request        = sdhci_request,
 706         .set_ios        = sdhci_set_ios,
 707         .get_ro         = sdhci_get_ro,
 708 };
 709
 710 /*****************************************************************************\
 711  *                                                                           *
 712  * Tasklets                                                                  *
 713  *                                                                           *
 714 \*****************************************************************************/
 715
 716 static void sdhci_tasklet_card(unsigned long param)
 717 {
 718         struct sdhci_host *host;
 719         unsigned long flags;
 720
 721         host = (struct sdhci_host*)param;
 722
 723         spin_lock_irqsave(&host->lock, flags);
 724
 725         if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
 726                 if (host->mrq) {
 727                         printk(KERN_ERR "%s: Card removed during transfer!\n",
 728                                 mmc_hostname(host->mmc));
 729                         printk(KERN_ERR "%s: Resetting controller.\n",
 730                                 mmc_hostname(host->mmc));
 731
 732                         sdhci_reset(host, SDHCI_RESET_CMD);
 733                         sdhci_reset(host, SDHCI_RESET_DATA);
 734
 735                         host->mrq->cmd->error = MMC_ERR_FAILED;
 736                         tasklet_schedule(&host->finish_tasklet);
 737                 }
 738         }
 739
 740         spin_unlock_irqrestore(&host->lock, flags);
 741
 742         mmc_detect_change(host->mmc, msecs_to_jiffies(500));
 743 }
 744
 745 static void sdhci_tasklet_finish(unsigned long param)
 746 {
 747         struct sdhci_host *host;
 748         unsigned long flags;
 749         struct mmc_request *mrq;
 750
 751         host = (struct sdhci_host*)param;
 752
 753         spin_lock_irqsave(&host->lock, flags);
 754
 755         del_timer(&host->timer);
 756
 757         mrq = host->mrq;
 758
 759         DBG("Ending request, cmd (%x)\n", mrq->cmd->opcode);
 760
 761         /*
 762          * The controller needs a reset of internal state machines
 763          * upon error conditions.
 764          */
 765         if ((mrq->cmd->error != MMC_ERR_NONE) ||
 766                 (mrq->data && ((mrq->data->error != MMC_ERR_NONE) ||
 767                 (mrq->data->stop && (mrq->data->stop->error != MMC_ERR_NONE))))) {
 768                 sdhci_reset(host, SDHCI_RESET_CMD);
 769                 sdhci_reset(host, SDHCI_RESET_DATA);
 770         }
 771
 772         host->mrq = NULL;
 773         host->cmd = NULL;
 774         host->data = NULL;
 775
 776         sdhci_deactivate_led(host);
 777
 778         spin_unlock_irqrestore(&host->lock, flags);
 779
 780         mmc_request_done(host->mmc, mrq);
 781 }
 782
 783 static void sdhci_timeout_timer(unsigned long data)
 784 {
 785         struct sdhci_host *host;
 786         unsigned long flags;
 787
 788         host = (struct sdhci_host*)data;
 789
 790         spin_lock_irqsave(&host->lock, flags);
 791
 792         if (host->mrq) {
 793                 printk(KERN_ERR "%s: Timeout waiting for hardware interrupt. "
 794                         "Please report this to " BUGMAIL ".\n",
 795                         mmc_hostname(host->mmc));
 796                 sdhci_dumpregs(host);
 797
 798                 if (host->data) {
 799                         host->data->error = MMC_ERR_TIMEOUT;
 800                         sdhci_finish_data(host);
 801                 } else {
 802                         if (host->cmd)
 803                                 host->cmd->error = MMC_ERR_TIMEOUT;
 804                         else
 805                                 host->mrq->cmd->error = MMC_ERR_TIMEOUT;
 806
 807                         tasklet_schedule(&host->finish_tasklet);
 808                 }
 809         }
 810
 811         spin_unlock_irqrestore(&host->lock, flags);
 812 }
 813
 814 /*****************************************************************************\
 815  *                                                                           *
 816  * Interrupt handling                                                        *
 817  *                                                                           *
 818 \*****************************************************************************/
 819
 820 static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask)
 821 {
 822         BUG_ON(intmask == 0);
 823
 824         if (!host->cmd) {
 825                 printk(KERN_ERR "%s: Got command interrupt even though no "
 826                         "command operation was in progress.\n",
 827                         mmc_hostname(host->mmc));
 828                 printk(KERN_ERR "%s: Please report this to " BUGMAIL ".\n",
 829                         mmc_hostname(host->mmc));
 830                 sdhci_dumpregs(host);
 831                 return;
 832         }
 833
 834         if (intmask & SDHCI_INT_RESPONSE)
 835                 sdhci_finish_command(host);
 836         else {
 837                 if (intmask & SDHCI_INT_TIMEOUT)
 838                         host->cmd->error = MMC_ERR_TIMEOUT;
 839                 else if (intmask & SDHCI_INT_CRC)
 840                         host->cmd->error = MMC_ERR_BADCRC;
 841                 else if (intmask & (SDHCI_INT_END_BIT | SDHCI_INT_INDEX))
 842                         host->cmd->error = MMC_ERR_FAILED;
 843                 else
 844                         host->cmd->error = MMC_ERR_INVALID;
 845
 846                 tasklet_schedule(&host->finish_tasklet);
 847         }
 848 }
 849
 850 static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
 851 {
 852         BUG_ON(intmask == 0);
 853
 854         if (!host->data) {
 855                 /*
 856                  * A data end interrupt is sent together with the response
 857                  * for the stop command.
 858                  */
 859                 if (intmask & SDHCI_INT_DATA_END)
 860                         return;
 861
 862                 printk(KERN_ERR "%s: Got data interrupt even though no "
 863                         "data operation was in progress.\n",
 864                         mmc_hostname(host->mmc));
 865                 printk(KERN_ERR "%s: Please report this to " BUGMAIL ".\n",
 866                         mmc_hostname(host->mmc));
 867                 sdhci_dumpregs(host);
 868
 869                 return;
 870         }
 871
 872         if (intmask & SDHCI_INT_DATA_TIMEOUT)
 873                 host->data->error = MMC_ERR_TIMEOUT;
 874         else if (intmask & SDHCI_INT_DATA_CRC)
 875                 host->data->error = MMC_ERR_BADCRC;
 876         else if (intmask & SDHCI_INT_DATA_END_BIT)
 877                 host->data->error = MMC_ERR_FAILED;
 878
 879         if (host->data->error != MMC_ERR_NONE)
 880                 sdhci_finish_data(host);
 881         else {
 882                 if (intmask & (SDHCI_INT_BUF_FULL | SDHCI_INT_BUF_EMPTY))
 883                         sdhci_transfer_pio(host);
 884
 885                 if (intmask & SDHCI_INT_DATA_END)
 886                         sdhci_finish_data(host);
 887         }
 888 }
 889
 890 static irqreturn_t sdhci_irq(int irq, void *dev_id, struct pt_regs *regs)
 891 {
 892         irqreturn_t result;
 893         struct sdhci_host* host = dev_id;
 894         u32 intmask;
 895
 896         spin_lock(&host->lock);
 897
 898         intmask = readl(host->ioaddr + SDHCI_INT_STATUS);
 899
 900         if (!intmask) {
 901                 result = IRQ_NONE;
 902                 goto out;
 903         }
 904
 905         DBG("*** %s got interrupt: 0x%08x\n", host->slot_descr, intmask);
 906
 907         if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE))
 908                 tasklet_schedule(&host->card_tasklet);
 909
 910         if (intmask & SDHCI_INT_CMD_MASK) {
 911                 sdhci_cmd_irq(host, intmask & SDHCI_INT_CMD_MASK);
 912
 913                 writel(intmask & SDHCI_INT_CMD_MASK,
 914                         host->ioaddr + SDHCI_INT_STATUS);
 915         }
 916
 917         if (intmask & SDHCI_INT_DATA_MASK) {
 918                 sdhci_data_irq(host, intmask & SDHCI_INT_DATA_MASK);
 919
 920                 writel(intmask & SDHCI_INT_DATA_MASK,
 921                         host->ioaddr + SDHCI_INT_STATUS);
 922         }
 923
 924         intmask &= ~(SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK);
 925
 926         if (intmask & SDHCI_INT_CARD_INT) {
 927                 printk(KERN_ERR "%s: Unexpected card interrupt. Please "
 928                         "report this to " BUGMAIL ".\n",
 929                         mmc_hostname(host->mmc));
 930                 sdhci_dumpregs(host);
 931         }
 932
 933         if (intmask & SDHCI_INT_BUS_POWER) {
 934                 printk(KERN_ERR "%s: Unexpected bus power interrupt. Please "
 935                         "report this to " BUGMAIL ".\n",
 936                         mmc_hostname(host->mmc));
 937                 sdhci_dumpregs(host);
 938         }
 939
 940         if (intmask & SDHCI_INT_ACMD12ERR) {
 941                 printk(KERN_ERR "%s: Unexpected auto CMD12 error. Please "
 942                         "report this to " BUGMAIL ".\n",
 943                         mmc_hostname(host->mmc));
 944                 sdhci_dumpregs(host);
 945
 946                 writew(~0, host->ioaddr + SDHCI_ACMD12_ERR);
 947         }
 948
 949         if (intmask)
 950                 writel(intmask, host->ioaddr + SDHCI_INT_STATUS);
 951
 952         result = IRQ_HANDLED;
 953
 954 out:
 955         spin_unlock(&host->lock);
 956
 957         return result;
 958 }
 959
 960 /*****************************************************************************\
 961  *                                                                           *
 962  * Suspend/resume                                                            *
 963  *                                                                           *
 964 \*****************************************************************************/
 965
 966 #ifdef CONFIG_PM
 967
 968 static int sdhci_suspend (struct pci_dev *pdev, pm_message_t state)
 969 {
 970         struct sdhci_chip *chip;
 971         int i, ret;
 972
 973         chip = pci_get_drvdata(pdev);
 974         if (!chip)
 975                 return 0;
 976
 977         DBG("Suspending...\n");
 978
 979         for (i = 0;i < chip->num_slots;i++) {
 980                 if (!chip->hosts[i])
 981                         continue;
 982                 ret = mmc_suspend_host(chip->hosts[i]->mmc, state);
 983                 if (ret) {
 984                         for (i--;i >= 0;i--)
 985                                 mmc_resume_host(chip->hosts[i]->mmc);
 986                         return ret;
 987                 }
 988         }
 989
 990         pci_save_state(pdev);
 991         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
 992         pci_disable_device(pdev);
 993         pci_set_power_state(pdev, pci_choose_state(pdev, state));
 994
 995         return 0;
 996 }
 997
 998 static int sdhci_resume (struct pci_dev *pdev)
 999 {
1000         struct sdhci_chip *chip;
1001         int i, ret;
1002
1003         chip = pci_get_drvdata(pdev);
1004         if (!chip)
1005                 return 0;
1006
1007         DBG("Resuming...\n");
1008
1009         pci_set_power_state(pdev, PCI_D0);
1010         pci_restore_state(pdev);
1011         pci_enable_device(pdev);
1012
1013         for (i = 0;i < chip->num_slots;i++) {
1014                 if (!chip->hosts[i])
1015                         continue;
1016                 if (chip->hosts[i]->flags & SDHCI_USE_DMA)
1017                         pci_set_master(pdev);
1018                 sdhci_init(chip->hosts[i]);
1019                 ret = mmc_resume_host(chip->hosts[i]->mmc);
1020                 if (ret)
1021                         return ret;
1022         }
1023
1024         return 0;
1025 }
1026
1027 #else /* CONFIG_PM */
1028
1029 #define sdhci_suspend NULL
1030 #define sdhci_resume NULL
1031
1032 #endif /* CONFIG_PM */
1033
1034 /*****************************************************************************\
1035  *                                                                           *
1036  * Device probing/removal                                                    *
1037  *                                                                           *
1038 \*****************************************************************************/
1039
1040 static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
1041 {
1042         int ret;
1043         struct sdhci_chip *chip;
1044         struct mmc_host *mmc;
1045         struct sdhci_host *host;
1046
1047         u8 first_bar;
1048         unsigned int caps;
1049
1050         chip = pci_get_drvdata(pdev);
1051         BUG_ON(!chip);
1052
1053         ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &first_bar);
1054         if (ret)
1055                 return ret;
1056
1057         first_bar &= PCI_SLOT_INFO_FIRST_BAR_MASK;
1058
1059         if (first_bar > 5) {
1060                 printk(KERN_ERR DRIVER_NAME ": Invalid first BAR. Aborting.\n");
1061                 return -ENODEV;
1062         }
1063
1064         if (!(pci_resource_flags(pdev, first_bar + slot) & IORESOURCE_MEM)) {
1065                 printk(KERN_ERR DRIVER_NAME ": BAR is not iomem. Aborting.\n");
1066                 return -ENODEV;
1067         }
1068
1069         if (pci_resource_len(pdev, first_bar + slot) != 0x100) {
1070                 printk(KERN_ERR DRIVER_NAME ": Invalid iomem size. Aborting.\n");
1071                 return -ENODEV;
1072         }
1073
1074         mmc = mmc_alloc_host(sizeof(struct sdhci_host), &pdev->dev);
1075         if (!mmc)
1076                 return -ENOMEM;
1077
1078         host = mmc_priv(mmc);
1079         host->mmc = mmc;
1080
1081         host->bar = first_bar + slot;
1082
1083         host->addr = pci_resource_start(pdev, host->bar);
1084         host->irq = pdev->irq;
1085
1086         DBG("slot %d at 0x%08lx, irq %d\n", slot, host->addr, host->irq);
1087
1088         snprintf(host->slot_descr, 20, "sdhci:slot%d", slot);
1089
1090         ret = pci_request_region(pdev, host->bar, host->slot_descr);
1091         if (ret)
1092                 goto free;
1093
1094         host->ioaddr = ioremap_nocache(host->addr,
1095                 pci_resource_len(pdev, host->bar));
1096         if (!host->ioaddr) {
1097                 ret = -ENOMEM;
1098                 goto release;
1099         }
1100
1101         caps = readl(host->ioaddr + SDHCI_CAPABILITIES);
1102
1103         if ((caps & SDHCI_CAN_DO_DMA) && ((pdev->class & 0x0000FF) == 0x01))
1104                 host->flags |= SDHCI_USE_DMA;
1105
1106         if (host->flags & SDHCI_USE_DMA) {
1107                 if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
1108                         printk(KERN_WARNING "%s: No suitable DMA available. "
1109                                 "Falling back to PIO.\n", host->slot_descr);
1110                         host->flags &= ~SDHCI_USE_DMA;
1111                 }
1112         }
1113
1114         if (host->flags & SDHCI_USE_DMA)
1115                 pci_set_master(pdev);
1116         else /* XXX: Hack to get MMC layer to avoid highmem */
1117                 pdev->dma_mask = 0;
1118
1119         host->max_clk =
1120                 (caps & SDHCI_CLOCK_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT;
1121         if (host->max_clk == 0) {
1122                 printk(KERN_ERR "%s: Hardware doesn't specify base clock "
1123                         "frequency.\n", host->slot_descr);
1124                 ret = -ENODEV;
1125                 goto unmap;
1126         }
1127         host->max_clk *= 1000000;
1128
1129         host->timeout_clk =
1130                 (caps & SDHCI_TIMEOUT_CLK_MASK) >> SDHCI_TIMEOUT_CLK_SHIFT;
1131         if (host->timeout_clk == 0) {
1132                 printk(KERN_ERR "%s: Hardware doesn't specify timeout clock "
1133                         "frequency.\n", host->slot_descr);
1134                 ret = -ENODEV;
1135                 goto unmap;
1136         }
1137         if (caps & SDHCI_TIMEOUT_CLK_UNIT)
1138                 host->timeout_clk *= 1000;
1139
1140         /*
1141          * Set host parameters.
1142          */
1143         mmc->ops = &sdhci_ops;
1144         mmc->f_min = host->max_clk / 256;
1145         mmc->f_max = host->max_clk;
1146         mmc->caps = MMC_CAP_4_BIT_DATA;
1147
1148         mmc->ocr_avail = 0;
1149         if (caps & SDHCI_CAN_VDD_330)
1150                 mmc->ocr_avail |= MMC_VDD_32_33|MMC_VDD_33_34;
1151         else if (caps & SDHCI_CAN_VDD_300)
1152                 mmc->ocr_avail |= MMC_VDD_29_30|MMC_VDD_30_31;
1153         else if (caps & SDHCI_CAN_VDD_180)
1154                 mmc->ocr_avail |= MMC_VDD_17_18|MMC_VDD_18_19;
1155
1156         if (mmc->ocr_avail == 0) {
1157                 printk(KERN_ERR "%s: Hardware doesn't report any "
1158                         "support voltages.\n", host->slot_descr);
1159                 ret = -ENODEV;
1160                 goto unmap;
1161         }
1162
1163         spin_lock_init(&host->lock);
1164
1165         /*
1166          * Maximum number of segments. Hardware cannot do scatter lists.
1167          */
1168         if (host->flags & SDHCI_USE_DMA)
1169                 mmc->max_hw_segs = 1;
1170         else
1171                 mmc->max_hw_segs = 16;
1172         mmc->max_phys_segs = 16;
1173
1174         /*
1175          * Maximum number of sectors in one transfer. Limited by sector
1176          * count register.
1177          */
1178         mmc->max_sectors = 0x3FFF;
1179
1180         /*
1181          * Maximum segment size. Could be one segment with the maximum number
1182          * of sectors.
1183          */
1184         mmc->max_seg_size = mmc->max_sectors * 512;
1185
1186         /*
1187          * Init tasklets.
1188          */
1189         tasklet_init(&host->card_tasklet,
1190                 sdhci_tasklet_card, (unsigned long)host);
1191         tasklet_init(&host->finish_tasklet,
1192                 sdhci_tasklet_finish, (unsigned long)host);
1193
1194         setup_timer(&host->timer, sdhci_timeout_timer, (long)host);
1195
1196         ret = request_irq(host->irq, sdhci_irq, SA_SHIRQ,
1197                 host->slot_descr, host);
1198         if (ret)
1199                 goto untasklet;
1200
1201         sdhci_init(host);
1202
1203 #ifdef CONFIG_MMC_DEBUG
1204         sdhci_dumpregs(host);
1205 #endif
1206
1207         host->chip = chip;
1208         chip->hosts[slot] = host;
1209
1210         mmc_add_host(mmc);
1211
1212         printk(KERN_INFO "%s: SDHCI at 0x%08lx irq %d %s\n", mmc_hostname(mmc),
1213                 host->addr, host->irq,
1214                 (host->flags & SDHCI_USE_DMA)?"DMA":"PIO");
1215
1216         return 0;
1217
1218 untasklet:
1219         tasklet_kill(&host->card_tasklet);
1220         tasklet_kill(&host->finish_tasklet);
1221 unmap:
1222         iounmap(host->ioaddr);
1223 release:
1224         pci_release_region(pdev, host->bar);
1225 free:
1226         mmc_free_host(mmc);
1227
1228         return ret;
1229 }
1230
1231 static void sdhci_remove_slot(struct pci_dev *pdev, int slot)
1232 {
1233         struct sdhci_chip *chip;
1234         struct mmc_host *mmc;
1235         struct sdhci_host *host;
1236
1237         chip = pci_get_drvdata(pdev);
1238         host = chip->hosts[slot];
1239         mmc = host->mmc;
1240
1241         chip->hosts[slot] = NULL;
1242
1243         mmc_remove_host(mmc);
1244
1245         sdhci_reset(host, SDHCI_RESET_ALL);
1246
1247         free_irq(host->irq, host);
1248
1249         del_timer_sync(&host->timer);
1250
1251         tasklet_kill(&host->card_tasklet);
1252         tasklet_kill(&host->finish_tasklet);
1253
1254         iounmap(host->ioaddr);
1255
1256         pci_release_region(pdev, host->bar);
1257
1258         mmc_free_host(mmc);
1259 }
1260
1261 static int __devinit sdhci_probe(struct pci_dev *pdev,
1262         const struct pci_device_id *ent)
1263 {
1264         int ret, i;
1265         u8 slots, rev;
1266         struct sdhci_chip *chip;
1267
1268         BUG_ON(pdev == NULL);
1269         BUG_ON(ent == NULL);
1270
1271         pci_read_config_byte(pdev, PCI_CLASS_REVISION, &rev);
1272
1273         printk(KERN_INFO DRIVER_NAME
1274                 ": SDHCI controller found at %s [%04x:%04x] (rev %x)\n",
1275                 pci_name(pdev), (int)pdev->vendor, (int)pdev->device,
1276                 (int)rev);
1277
1278         ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &slots);
1279         if (ret)
1280                 return ret;
1281
1282         slots = PCI_SLOT_INFO_SLOTS(slots) + 1;
1283         DBG("found %d slot(s)\n", slots);
1284         if (slots == 0)
1285                 return -ENODEV;
1286
1287         ret = pci_enable_device(pdev);
1288         if (ret)
1289                 return ret;
1290
1291         chip = kzalloc(sizeof(struct sdhci_chip) +
1292                 sizeof(struct sdhci_host*) * slots, GFP_KERNEL);
1293         if (!chip) {
1294                 ret = -ENOMEM;
1295                 goto err;
1296         }
1297
1298         chip->pdev = pdev;
1299
1300         chip->num_slots = slots;
1301         pci_set_drvdata(pdev, chip);
1302
1303         for (i = 0;i < slots;i++) {
1304                 ret = sdhci_probe_slot(pdev, i);
1305                 if (ret) {
1306                         for (i--;i >= 0;i--)
1307                                 sdhci_remove_slot(pdev, i);
1308                         goto free;
1309                 }
1310         }
1311
1312         return 0;
1313
1314 free:
1315         pci_set_drvdata(pdev, NULL);
1316         kfree(chip);
1317
1318 err:
1319         pci_disable_device(pdev);
1320         return ret;
1321 }
1322
1323 static void __devexit sdhci_remove(struct pci_dev *pdev)
1324 {
1325         int i;
1326         struct sdhci_chip *chip;
1327
1328         chip = pci_get_drvdata(pdev);
1329
1330         if (chip) {
1331                 for (i = 0;i < chip->num_slots;i++)
1332                         sdhci_remove_slot(pdev, i);
1333
1334                 pci_set_drvdata(pdev, NULL);
1335
1336                 kfree(chip);
1337         }
1338
1339         pci_disable_device(pdev);
1340 }
1341
1342 static struct pci_driver sdhci_driver = {
1343         .name =         DRIVER_NAME,
1344         .id_table =     pci_ids,
1345         .probe =        sdhci_probe,
1346         .remove =       __devexit_p(sdhci_remove),
1347         .suspend =      sdhci_suspend,
1348         .resume =       sdhci_resume,
1349 };
1350
1351 /*****************************************************************************\
1352  *                                                                           *
1353  * Driver init/exit                                                          *
1354  *                                                                           *
1355 \*****************************************************************************/
1356
1357 static int __init sdhci_drv_init(void)
1358 {
1359         printk(KERN_INFO DRIVER_NAME
1360                 ": Secure Digital Host Controller Interface driver, "
1361                 DRIVER_VERSION "\n");
1362         printk(KERN_INFO DRIVER_NAME ": Copyright(c) Pierre Ossman\n");
1363
1364         return pci_register_driver(&sdhci_driver);
1365 }
1366
1367 static void __exit sdhci_drv_exit(void)
1368 {
1369         DBG("Exiting\n");
1370
1371         pci_unregister_driver(&sdhci_driver);
1372 }
1373
1374 module_init(sdhci_drv_init);
1375 module_exit(sdhci_drv_exit);
1376
1377 MODULE_AUTHOR("Pierre Ossman <drzeus@drzeus.cx>");
1378 MODULE_DESCRIPTION("Secure Digital Host Controller Interface driver");
1379 MODULE_VERSION(DRIVER_VERSION);
1380 MODULE_LICENSE("GPL");