Pileus Git - ~andy/linux/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
 332         /* timeout in us */
 333         target_timeout = data->timeout_ns / 1000 +
 334                 data->timeout_clks / host->clock;
 335
 336         /*
 337          * Figure out needed cycles.
 338          * We do this in steps in order to fit inside a 32 bit int.
 339          * The first step is the minimum timeout, which will have a
 340          * minimum resolution of 6 bits:
 341          * (1) 2^13*1000 > 2^22,
 342          * (2) host->timeout_clk < 2^16
 343          *     =>
 344          *     (1) / (2) > 2^6
 345          */
 346         count = 0;
 347         current_timeout = (1 << 13) * 1000 / host->timeout_clk;
 348         while (current_timeout < target_timeout) {
 349                 count++;
 350                 current_timeout <<= 1;
 351                 if (count >= 0xF)
 352                         break;
 353         }
 354
 355         if (count >= 0xF) {
 356                 printk(KERN_WARNING "%s: Too large timeout requested!\n",
 357                         mmc_hostname(host->mmc));
 358                 count = 0xE;
 359         }
 360
 361         writeb(count, host->ioaddr + SDHCI_TIMEOUT_CONTROL);
 362
 363         if (host->flags & SDHCI_USE_DMA) {
 364                 int count;
 365
 366                 count = pci_map_sg(host->chip->pdev, data->sg, data->sg_len,
 367                         (data->flags & MMC_DATA_READ)?PCI_DMA_FROMDEVICE:PCI_DMA_TODEVICE);
 368                 BUG_ON(count != 1);
 369
 370                 writel(sg_dma_address(data->sg), host->ioaddr + SDHCI_DMA_ADDRESS);
 371         } else {
 372                 host->size = data->blksz * data->blocks;
 373
 374                 host->cur_sg = data->sg;
 375                 host->num_sg = data->sg_len;
 376
 377                 host->offset = 0;
 378                 host->remain = host->cur_sg->length;
 379         }
 380
 381         /* We do not handle DMA boundaries, so set it to max (512 KiB) */
 382         writew(SDHCI_MAKE_BLKSZ(7, data->blksz),
 383                 host->ioaddr + SDHCI_BLOCK_SIZE);
 384         writew(data->blocks, host->ioaddr + SDHCI_BLOCK_COUNT);
 385 }
 386
 387 static void sdhci_set_transfer_mode(struct sdhci_host *host,
 388         struct mmc_data *data)
 389 {
 390         u16 mode;
 391
 392         WARN_ON(host->data);
 393
 394         if (data == NULL)
 395                 return;
 396
 397         mode = SDHCI_TRNS_BLK_CNT_EN;
 398         if (data->blocks > 1)
 399                 mode |= SDHCI_TRNS_MULTI;
 400         if (data->flags & MMC_DATA_READ)
 401                 mode |= SDHCI_TRNS_READ;
 402         if (host->flags & SDHCI_USE_DMA)
 403                 mode |= SDHCI_TRNS_DMA;
 404
 405         writew(mode, host->ioaddr + SDHCI_TRANSFER_MODE);
 406 }
 407
 408 static void sdhci_finish_data(struct sdhci_host *host)
 409 {
 410         struct mmc_data *data;
 411         u16 blocks;
 412
 413         BUG_ON(!host->data);
 414
 415         data = host->data;
 416         host->data = NULL;
 417
 418         if (host->flags & SDHCI_USE_DMA) {
 419                 pci_unmap_sg(host->chip->pdev, data->sg, data->sg_len,
 420                         (data->flags & MMC_DATA_READ)?PCI_DMA_FROMDEVICE:PCI_DMA_TODEVICE);
 421         }
 422
 423         /*
 424          * Controller doesn't count down when in single block mode.
 425          */
 426         if ((data->blocks == 1) && (data->error == MMC_ERR_NONE))
 427                 blocks = 0;
 428         else
 429                 blocks = readw(host->ioaddr + SDHCI_BLOCK_COUNT);
 430         data->bytes_xfered = data->blksz * (data->blocks - blocks);
 431
 432         if ((data->error == MMC_ERR_NONE) && blocks) {
 433                 printk(KERN_ERR "%s: Controller signalled completion even "
 434                         "though there were blocks left. Please report this "
 435                         "to " BUGMAIL ".\n", mmc_hostname(host->mmc));
 436                 data->error = MMC_ERR_FAILED;
 437         }
 438
 439         if (host->size != 0) {
 440                 printk(KERN_ERR "%s: %d bytes were left untransferred. "
 441                         "Please report this to " BUGMAIL ".\n",
 442                         mmc_hostname(host->mmc), host->size);
 443                 data->error = MMC_ERR_FAILED;
 444         }
 445
 446         DBG("Ending data transfer (%d bytes)\n", data->bytes_xfered);
 447
 448         if (data->stop) {
 449                 /*
 450                  * The controller needs a reset of internal state machines
 451                  * upon error conditions.
 452                  */
 453                 if (data->error != MMC_ERR_NONE) {
 454                         sdhci_reset(host, SDHCI_RESET_CMD);
 455                         sdhci_reset(host, SDHCI_RESET_DATA);
 456                 }
 457
 458                 sdhci_send_command(host, data->stop);
 459         } else
 460                 tasklet_schedule(&host->finish_tasklet);
 461 }
 462
 463 static void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
 464 {
 465         int flags;
 466         unsigned long timeout;
 467
 468         WARN_ON(host->cmd);
 469
 470         DBG("Sending cmd (%x)\n", cmd->opcode);
 471
 472         /* Wait max 10 ms */
 473         timeout = 10;
 474         while (readl(host->ioaddr + SDHCI_PRESENT_STATE) &
 475                 (SDHCI_CMD_INHIBIT | SDHCI_DATA_INHIBIT)) {
 476                 if (timeout == 0) {
 477                         printk(KERN_ERR "%s: Controller never released "
 478                                 "inhibit bits. Please report this to "
 479                                 BUGMAIL ".\n", mmc_hostname(host->mmc));
 480                         sdhci_dumpregs(host);
 481                         cmd->error = MMC_ERR_FAILED;
 482                         tasklet_schedule(&host->finish_tasklet);
 483                         return;
 484                 }
 485                 timeout--;
 486                 mdelay(1);
 487         }
 488
 489         mod_timer(&host->timer, jiffies + 10 * HZ);
 490
 491         host->cmd = cmd;
 492
 493         sdhci_prepare_data(host, cmd->data);
 494
 495         writel(cmd->arg, host->ioaddr + SDHCI_ARGUMENT);
 496
 497         sdhci_set_transfer_mode(host, cmd->data);
 498
 499         if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) {
 500                 printk(KERN_ERR "%s: Unsupported response type! "
 501                         "Please report this to " BUGMAIL ".\n",
 502                         mmc_hostname(host->mmc));
 503                 cmd->error = MMC_ERR_INVALID;
 504                 tasklet_schedule(&host->finish_tasklet);
 505                 return;
 506         }
 507
 508         if (!(cmd->flags & MMC_RSP_PRESENT))
 509                 flags = SDHCI_CMD_RESP_NONE;
 510         else if (cmd->flags & MMC_RSP_136)
 511                 flags = SDHCI_CMD_RESP_LONG;
 512         else if (cmd->flags & MMC_RSP_BUSY)
 513                 flags = SDHCI_CMD_RESP_SHORT_BUSY;
 514         else
 515                 flags = SDHCI_CMD_RESP_SHORT;
 516
 517         if (cmd->flags & MMC_RSP_CRC)
 518                 flags |= SDHCI_CMD_CRC;
 519         if (cmd->flags & MMC_RSP_OPCODE)
 520                 flags |= SDHCI_CMD_INDEX;
 521         if (cmd->data)
 522                 flags |= SDHCI_CMD_DATA;
 523
 524         writel(SDHCI_MAKE_CMD(cmd->opcode, flags),
 525                 host->ioaddr + SDHCI_COMMAND);
 526 }
 527
 528 static void sdhci_finish_command(struct sdhci_host *host)
 529 {
 530         int i;
 531
 532         BUG_ON(host->cmd == NULL);
 533
 534         if (host->cmd->flags & MMC_RSP_PRESENT) {
 535                 if (host->cmd->flags & MMC_RSP_136) {
 536                         /* CRC is stripped so we need to do some shifting. */
 537                         for (i = 0;i < 4;i++) {
 538                                 host->cmd->resp[i] = readl(host->ioaddr +
 539                                         SDHCI_RESPONSE + (3-i)*4) << 8;
 540                                 if (i != 3)
 541                                         host->cmd->resp[i] |=
 542                                                 readb(host->ioaddr +
 543                                                 SDHCI_RESPONSE + (3-i)*4-1);
 544                         }
 545                 } else {
 546                         host->cmd->resp[0] = readl(host->ioaddr + SDHCI_RESPONSE);
 547                 }
 548         }
 549
 550         host->cmd->error = MMC_ERR_NONE;
 551
 552         DBG("Ending cmd (%x)\n", host->cmd->opcode);
 553
 554         if (host->cmd->data)
 555                 host->data = host->cmd->data;
 556         else
 557                 tasklet_schedule(&host->finish_tasklet);
 558
 559         host->cmd = NULL;
 560 }
 561
 562 static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
 563 {
 564         int div;
 565         u16 clk;
 566         unsigned long timeout;
 567
 568         if (clock == host->clock)
 569                 return;
 570
 571         writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL);
 572
 573         if (clock == 0)
 574                 goto out;
 575
 576         for (div = 1;div < 256;div *= 2) {
 577                 if ((host->max_clk / div) <= clock)
 578                         break;
 579         }
 580         div >>= 1;
 581
 582         clk = div << SDHCI_DIVIDER_SHIFT;
 583         clk |= SDHCI_CLOCK_INT_EN;
 584         writew(clk, host->ioaddr + SDHCI_CLOCK_CONTROL);
 585
 586         /* Wait max 10 ms */
 587         timeout = 10;
 588         while (!((clk = readw(host->ioaddr + SDHCI_CLOCK_CONTROL))
 589                 & SDHCI_CLOCK_INT_STABLE)) {
 590                 if (timeout == 0) {
 591                         printk(KERN_ERR "%s: Internal clock never stabilised. "
 592                                 "Please report this to " BUGMAIL ".\n",
 593                                 mmc_hostname(host->mmc));
 594                         sdhci_dumpregs(host);
 595                         return;
 596                 }
 597                 timeout--;
 598                 mdelay(1);
 599         }
 600
 601         clk |= SDHCI_CLOCK_CARD_EN;
 602         writew(clk, host->ioaddr + SDHCI_CLOCK_CONTROL);
 603
 604 out:
 605         host->clock = clock;
 606 }
 607
 608 static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
 609 {
 610         u8 pwr;
 611
 612         if (host->power == power)
 613                 return;
 614
 615         writeb(0, host->ioaddr + SDHCI_POWER_CONTROL);
 616
 617         if (power == (unsigned short)-1)
 618                 goto out;
 619
 620         pwr = SDHCI_POWER_ON;
 621
 622         switch (power) {
 623         case MMC_VDD_170:
 624         case MMC_VDD_180:
 625         case MMC_VDD_190:
 626                 pwr |= SDHCI_POWER_180;
 627                 break;
 628         case MMC_VDD_290:
 629         case MMC_VDD_300:
 630         case MMC_VDD_310:
 631                 pwr |= SDHCI_POWER_300;
 632                 break;
 633         case MMC_VDD_320:
 634         case MMC_VDD_330:
 635         case MMC_VDD_340:
 636                 pwr |= SDHCI_POWER_330;
 637                 break;
 638         default:
 639                 BUG();
 640         }
 641
 642         writeb(pwr, host->ioaddr + SDHCI_POWER_CONTROL);
 643
 644 out:
 645         host->power = power;
 646 }
 647
 648 /*****************************************************************************\
 649  *                                                                           *
 650  * MMC callbacks                                                             *
 651  *                                                                           *
 652 \*****************************************************************************/
 653
 654 static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
 655 {
 656         struct sdhci_host *host;
 657         unsigned long flags;
 658
 659         host = mmc_priv(mmc);
 660
 661         spin_lock_irqsave(&host->lock, flags);
 662
 663         WARN_ON(host->mrq != NULL);
 664
 665         sdhci_activate_led(host);
 666
 667         host->mrq = mrq;
 668
 669         if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
 670                 host->mrq->cmd->error = MMC_ERR_TIMEOUT;
 671                 tasklet_schedule(&host->finish_tasklet);
 672         } else
 673                 sdhci_send_command(host, mrq->cmd);
 674
 675         spin_unlock_irqrestore(&host->lock, flags);
 676 }
 677
 678 static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 679 {
 680         struct sdhci_host *host;
 681         unsigned long flags;
 682         u8 ctrl;
 683
 684         host = mmc_priv(mmc);
 685
 686         spin_lock_irqsave(&host->lock, flags);
 687
 688         /*
 689          * Reset the chip on each power off.
 690          * Should clear out any weird states.
 691          */
 692         if (ios->power_mode == MMC_POWER_OFF) {
 693                 writel(0, host->ioaddr + SDHCI_SIGNAL_ENABLE);
 694                 sdhci_init(host);
 695         }
 696
 697         sdhci_set_clock(host, ios->clock);
 698
 699         if (ios->power_mode == MMC_POWER_OFF)
 700                 sdhci_set_power(host, -1);
 701         else
 702                 sdhci_set_power(host, ios->vdd);
 703
 704         ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
 705         if (ios->bus_width == MMC_BUS_WIDTH_4)
 706                 ctrl |= SDHCI_CTRL_4BITBUS;
 707         else
 708                 ctrl &= ~SDHCI_CTRL_4BITBUS;
 709         writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
 710
 711         spin_unlock_irqrestore(&host->lock, flags);
 712 }
 713
 714 static int sdhci_get_ro(struct mmc_host *mmc)
 715 {
 716         struct sdhci_host *host;
 717         unsigned long flags;
 718         int present;
 719
 720         host = mmc_priv(mmc);
 721
 722         spin_lock_irqsave(&host->lock, flags);
 723
 724         present = readl(host->ioaddr + SDHCI_PRESENT_STATE);
 725
 726         spin_unlock_irqrestore(&host->lock, flags);
 727
 728         return !(present & SDHCI_WRITE_PROTECT);
 729 }
 730
 731 static struct mmc_host_ops sdhci_ops = {
 732         .request        = sdhci_request,
 733         .set_ios        = sdhci_set_ios,
 734         .get_ro         = sdhci_get_ro,
 735 };
 736
 737 /*****************************************************************************\
 738  *                                                                           *
 739  * Tasklets                                                                  *
 740  *                                                                           *
 741 \*****************************************************************************/
 742
 743 static void sdhci_tasklet_card(unsigned long param)
 744 {
 745         struct sdhci_host *host;
 746         unsigned long flags;
 747
 748         host = (struct sdhci_host*)param;
 749
 750         spin_lock_irqsave(&host->lock, flags);
 751
 752         if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
 753                 if (host->mrq) {
 754                         printk(KERN_ERR "%s: Card removed during transfer!\n",
 755                                 mmc_hostname(host->mmc));
 756                         printk(KERN_ERR "%s: Resetting controller.\n",
 757                                 mmc_hostname(host->mmc));
 758
 759                         sdhci_reset(host, SDHCI_RESET_CMD);
 760                         sdhci_reset(host, SDHCI_RESET_DATA);
 761
 762                         host->mrq->cmd->error = MMC_ERR_FAILED;
 763                         tasklet_schedule(&host->finish_tasklet);
 764                 }
 765         }
 766
 767         spin_unlock_irqrestore(&host->lock, flags);
 768
 769         mmc_detect_change(host->mmc, msecs_to_jiffies(500));
 770 }
 771
 772 static void sdhci_tasklet_finish(unsigned long param)
 773 {
 774         struct sdhci_host *host;
 775         unsigned long flags;
 776         struct mmc_request *mrq;
 777
 778         host = (struct sdhci_host*)param;
 779
 780         spin_lock_irqsave(&host->lock, flags);
 781
 782         del_timer(&host->timer);
 783
 784         mrq = host->mrq;
 785
 786         DBG("Ending request, cmd (%x)\n", mrq->cmd->opcode);
 787
 788         /*
 789          * The controller needs a reset of internal state machines
 790          * upon error conditions.
 791          */
 792         if ((mrq->cmd->error != MMC_ERR_NONE) ||
 793                 (mrq->data && ((mrq->data->error != MMC_ERR_NONE) ||
 794                 (mrq->data->stop && (mrq->data->stop->error != MMC_ERR_NONE))))) {
 795                 sdhci_reset(host, SDHCI_RESET_CMD);
 796                 sdhci_reset(host, SDHCI_RESET_DATA);
 797         }
 798
 799         host->mrq = NULL;
 800         host->cmd = NULL;
 801         host->data = NULL;
 802
 803         sdhci_deactivate_led(host);
 804
 805         spin_unlock_irqrestore(&host->lock, flags);
 806
 807         mmc_request_done(host->mmc, mrq);
 808 }
 809
 810 static void sdhci_timeout_timer(unsigned long data)
 811 {
 812         struct sdhci_host *host;
 813         unsigned long flags;
 814
 815         host = (struct sdhci_host*)data;
 816
 817         spin_lock_irqsave(&host->lock, flags);
 818
 819         if (host->mrq) {
 820                 printk(KERN_ERR "%s: Timeout waiting for hardware interrupt. "
 821                         "Please report this to " BUGMAIL ".\n",
 822                         mmc_hostname(host->mmc));
 823                 sdhci_dumpregs(host);
 824
 825                 if (host->data) {
 826                         host->data->error = MMC_ERR_TIMEOUT;
 827                         sdhci_finish_data(host);
 828                 } else {
 829                         if (host->cmd)
 830                                 host->cmd->error = MMC_ERR_TIMEOUT;
 831                         else
 832                                 host->mrq->cmd->error = MMC_ERR_TIMEOUT;
 833
 834                         tasklet_schedule(&host->finish_tasklet);
 835                 }
 836         }
 837
 838         spin_unlock_irqrestore(&host->lock, flags);
 839 }
 840
 841 /*****************************************************************************\
 842  *                                                                           *
 843  * Interrupt handling                                                        *
 844  *                                                                           *
 845 \*****************************************************************************/
 846
 847 static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask)
 848 {
 849         BUG_ON(intmask == 0);
 850
 851         if (!host->cmd) {
 852                 printk(KERN_ERR "%s: Got command interrupt even though no "
 853                         "command operation was in progress.\n",
 854                         mmc_hostname(host->mmc));
 855                 printk(KERN_ERR "%s: Please report this to " BUGMAIL ".\n",
 856                         mmc_hostname(host->mmc));
 857                 sdhci_dumpregs(host);
 858                 return;
 859         }
 860
 861         if (intmask & SDHCI_INT_RESPONSE)
 862                 sdhci_finish_command(host);
 863         else {
 864                 if (intmask & SDHCI_INT_TIMEOUT)
 865                         host->cmd->error = MMC_ERR_TIMEOUT;
 866                 else if (intmask & SDHCI_INT_CRC)
 867                         host->cmd->error = MMC_ERR_BADCRC;
 868                 else if (intmask & (SDHCI_INT_END_BIT | SDHCI_INT_INDEX))
 869                         host->cmd->error = MMC_ERR_FAILED;
 870                 else
 871                         host->cmd->error = MMC_ERR_INVALID;
 872
 873                 tasklet_schedule(&host->finish_tasklet);
 874         }
 875 }
 876
 877 static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
 878 {
 879         BUG_ON(intmask == 0);
 880
 881         if (!host->data) {
 882                 /*
 883                  * A data end interrupt is sent together with the response
 884                  * for the stop command.
 885                  */
 886                 if (intmask & SDHCI_INT_DATA_END)
 887                         return;
 888
 889                 printk(KERN_ERR "%s: Got data interrupt even though no "
 890                         "data operation was in progress.\n",
 891                         mmc_hostname(host->mmc));
 892                 printk(KERN_ERR "%s: Please report this to " BUGMAIL ".\n",
 893                         mmc_hostname(host->mmc));
 894                 sdhci_dumpregs(host);
 895
 896                 return;
 897         }
 898
 899         if (intmask & SDHCI_INT_DATA_TIMEOUT)
 900                 host->data->error = MMC_ERR_TIMEOUT;
 901         else if (intmask & SDHCI_INT_DATA_CRC)
 902                 host->data->error = MMC_ERR_BADCRC;
 903         else if (intmask & SDHCI_INT_DATA_END_BIT)
 904                 host->data->error = MMC_ERR_FAILED;
 905
 906         if (host->data->error != MMC_ERR_NONE)
 907                 sdhci_finish_data(host);
 908         else {
 909                 if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL))
 910                         sdhci_transfer_pio(host);
 911
 912                 if (intmask & SDHCI_INT_DATA_END)
 913                         sdhci_finish_data(host);
 914         }
 915 }
 916
 917 static irqreturn_t sdhci_irq(int irq, void *dev_id, struct pt_regs *regs)
 918 {
 919         irqreturn_t result;
 920         struct sdhci_host* host = dev_id;
 921         u32 intmask;
 922
 923         spin_lock(&host->lock);
 924
 925         intmask = readl(host->ioaddr + SDHCI_INT_STATUS);
 926
 927         if (!intmask) {
 928                 result = IRQ_NONE;
 929                 goto out;
 930         }
 931
 932         DBG("*** %s got interrupt: 0x%08x\n", host->slot_descr, intmask);
 933
 934         if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) {
 935                 writel(intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE),
 936                         host->ioaddr + SDHCI_INT_STATUS);
 937                 tasklet_schedule(&host->card_tasklet);
 938         }
 939
 940         intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE);
 941
 942         if (intmask & SDHCI_INT_CMD_MASK) {
 943                 writel(intmask & SDHCI_INT_CMD_MASK,
 944                         host->ioaddr + SDHCI_INT_STATUS);
 945                 sdhci_cmd_irq(host, intmask & SDHCI_INT_CMD_MASK);
 946         }
 947
 948         if (intmask & SDHCI_INT_DATA_MASK) {
 949                 writel(intmask & SDHCI_INT_DATA_MASK,
 950                         host->ioaddr + SDHCI_INT_STATUS);
 951                 sdhci_data_irq(host, intmask & SDHCI_INT_DATA_MASK);
 952         }
 953
 954         intmask &= ~(SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK);
 955
 956         if (intmask & SDHCI_INT_BUS_POWER) {
 957                 printk(KERN_ERR "%s: Card is consuming too much power!\n",
 958                         mmc_hostname(host->mmc));
 959                 writel(SDHCI_INT_BUS_POWER, host->ioaddr + SDHCI_INT_STATUS);
 960         }
 961
 962         intmask &= SDHCI_INT_BUS_POWER;
 963
 964         if (intmask) {
 965                 printk(KERN_ERR "%s: Unexpected interrupt 0x%08x. Please "
 966                         "report this to " BUGMAIL ".\n",
 967                         mmc_hostname(host->mmc), intmask);
 968                 sdhci_dumpregs(host);
 969
 970                 writel(intmask, host->ioaddr + SDHCI_INT_STATUS);
 971         }
 972
 973         result = IRQ_HANDLED;
 974
 975 out:
 976         spin_unlock(&host->lock);
 977
 978         return result;
 979 }
 980
 981 /*****************************************************************************\
 982  *                                                                           *
 983  * Suspend/resume                                                            *
 984  *                                                                           *
 985 \*****************************************************************************/
 986
 987 #ifdef CONFIG_PM
 988
 989 static int sdhci_suspend (struct pci_dev *pdev, pm_message_t state)
 990 {
 991         struct sdhci_chip *chip;
 992         int i, ret;
 993
 994         chip = pci_get_drvdata(pdev);
 995         if (!chip)
 996                 return 0;
 997
 998         DBG("Suspending...\n");
 999
1000         for (i = 0;i < chip->num_slots;i++) {
1001                 if (!chip->hosts[i])
1002                         continue;
1003                 ret = mmc_suspend_host(chip->hosts[i]->mmc, state);
1004                 if (ret) {
1005                         for (i--;i >= 0;i--)
1006                                 mmc_resume_host(chip->hosts[i]->mmc);
1007                         return ret;
1008                 }
1009         }
1010
1011         pci_save_state(pdev);
1012         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
1013         pci_disable_device(pdev);
1014         pci_set_power_state(pdev, pci_choose_state(pdev, state));
1015
1016         return 0;
1017 }
1018
1019 static int sdhci_resume (struct pci_dev *pdev)
1020 {
1021         struct sdhci_chip *chip;
1022         int i, ret;
1023
1024         chip = pci_get_drvdata(pdev);
1025         if (!chip)
1026                 return 0;
1027
1028         DBG("Resuming...\n");
1029
1030         pci_set_power_state(pdev, PCI_D0);
1031         pci_restore_state(pdev);
1032         pci_enable_device(pdev);
1033
1034         for (i = 0;i < chip->num_slots;i++) {
1035                 if (!chip->hosts[i])
1036                         continue;
1037                 if (chip->hosts[i]->flags & SDHCI_USE_DMA)
1038                         pci_set_master(pdev);
1039                 sdhci_init(chip->hosts[i]);
1040                 ret = mmc_resume_host(chip->hosts[i]->mmc);
1041                 if (ret)
1042                         return ret;
1043         }
1044
1045         return 0;
1046 }
1047
1048 #else /* CONFIG_PM */
1049
1050 #define sdhci_suspend NULL
1051 #define sdhci_resume NULL
1052
1053 #endif /* CONFIG_PM */
1054
1055 /*****************************************************************************\
1056  *                                                                           *
1057  * Device probing/removal                                                    *
1058  *                                                                           *
1059 \*****************************************************************************/
1060
1061 static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
1062 {
1063         int ret;
1064         struct sdhci_chip *chip;
1065         struct mmc_host *mmc;
1066         struct sdhci_host *host;
1067
1068         u8 first_bar;
1069         unsigned int caps;
1070
1071         chip = pci_get_drvdata(pdev);
1072         BUG_ON(!chip);
1073
1074         ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &first_bar);
1075         if (ret)
1076                 return ret;
1077
1078         first_bar &= PCI_SLOT_INFO_FIRST_BAR_MASK;
1079
1080         if (first_bar > 5) {
1081                 printk(KERN_ERR DRIVER_NAME ": Invalid first BAR. Aborting.\n");
1082                 return -ENODEV;
1083         }
1084
1085         if (!(pci_resource_flags(pdev, first_bar + slot) & IORESOURCE_MEM)) {
1086                 printk(KERN_ERR DRIVER_NAME ": BAR is not iomem. Aborting.\n");
1087                 return -ENODEV;
1088         }
1089
1090         if (pci_resource_len(pdev, first_bar + slot) != 0x100) {
1091                 printk(KERN_ERR DRIVER_NAME ": Invalid iomem size. Aborting.\n");
1092                 return -ENODEV;
1093         }
1094
1095         mmc = mmc_alloc_host(sizeof(struct sdhci_host), &pdev->dev);
1096         if (!mmc)
1097                 return -ENOMEM;
1098
1099         host = mmc_priv(mmc);
1100         host->mmc = mmc;
1101
1102         host->bar = first_bar + slot;
1103
1104         host->addr = pci_resource_start(pdev, host->bar);
1105         host->irq = pdev->irq;
1106
1107         DBG("slot %d at 0x%08lx, irq %d\n", slot, host->addr, host->irq);
1108
1109         snprintf(host->slot_descr, 20, "sdhci:slot%d", slot);
1110
1111         ret = pci_request_region(pdev, host->bar, host->slot_descr);
1112         if (ret)
1113                 goto free;
1114
1115         host->ioaddr = ioremap_nocache(host->addr,
1116                 pci_resource_len(pdev, host->bar));
1117         if (!host->ioaddr) {
1118                 ret = -ENOMEM;
1119                 goto release;
1120         }
1121
1122         caps = readl(host->ioaddr + SDHCI_CAPABILITIES);
1123
1124         if ((caps & SDHCI_CAN_DO_DMA) && ((pdev->class & 0x0000FF) == 0x01))
1125                 host->flags |= SDHCI_USE_DMA;
1126
1127         if (host->flags & SDHCI_USE_DMA) {
1128                 if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
1129                         printk(KERN_WARNING "%s: No suitable DMA available. "
1130                                 "Falling back to PIO.\n", host->slot_descr);
1131                         host->flags &= ~SDHCI_USE_DMA;
1132                 }
1133         }
1134
1135         if (host->flags & SDHCI_USE_DMA)
1136                 pci_set_master(pdev);
1137         else /* XXX: Hack to get MMC layer to avoid highmem */
1138                 pdev->dma_mask = 0;
1139
1140         host->max_clk =
1141                 (caps & SDHCI_CLOCK_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT;
1142         if (host->max_clk == 0) {
1143                 printk(KERN_ERR "%s: Hardware doesn't specify base clock "
1144                         "frequency.\n", host->slot_descr);
1145                 ret = -ENODEV;
1146                 goto unmap;
1147         }
1148         host->max_clk *= 1000000;
1149
1150         host->timeout_clk =
1151                 (caps & SDHCI_TIMEOUT_CLK_MASK) >> SDHCI_TIMEOUT_CLK_SHIFT;
1152         if (host->timeout_clk == 0) {
1153                 printk(KERN_ERR "%s: Hardware doesn't specify timeout clock "
1154                         "frequency.\n", host->slot_descr);
1155                 ret = -ENODEV;
1156                 goto unmap;
1157         }
1158         if (caps & SDHCI_TIMEOUT_CLK_UNIT)
1159                 host->timeout_clk *= 1000;
1160
1161         /*
1162          * Set host parameters.
1163          */
1164         mmc->ops = &sdhci_ops;
1165         mmc->f_min = host->max_clk / 256;
1166         mmc->f_max = host->max_clk;
1167         mmc->caps = MMC_CAP_4_BIT_DATA;
1168
1169         mmc->ocr_avail = 0;
1170         if (caps & SDHCI_CAN_VDD_330)
1171                 mmc->ocr_avail |= MMC_VDD_32_33|MMC_VDD_33_34;
1172         else if (caps & SDHCI_CAN_VDD_300)
1173                 mmc->ocr_avail |= MMC_VDD_29_30|MMC_VDD_30_31;
1174         else if (caps & SDHCI_CAN_VDD_180)
1175                 mmc->ocr_avail |= MMC_VDD_17_18|MMC_VDD_18_19;
1176
1177         if (mmc->ocr_avail == 0) {
1178                 printk(KERN_ERR "%s: Hardware doesn't report any "
1179                         "support voltages.\n", host->slot_descr);
1180                 ret = -ENODEV;
1181                 goto unmap;
1182         }
1183
1184         spin_lock_init(&host->lock);
1185
1186         /*
1187          * Maximum number of segments. Hardware cannot do scatter lists.
1188          */
1189         if (host->flags & SDHCI_USE_DMA)
1190                 mmc->max_hw_segs = 1;
1191         else
1192                 mmc->max_hw_segs = 16;
1193         mmc->max_phys_segs = 16;
1194
1195         /*
1196          * Maximum number of sectors in one transfer. Limited by DMA boundary
1197          * size (512KiB), which means (512 KiB/512=) 1024 entries.
1198          */
1199         mmc->max_sectors = 1024;
1200
1201         /*
1202          * Maximum segment size. Could be one segment with the maximum number
1203          * of sectors.
1204          */
1205         mmc->max_seg_size = mmc->max_sectors * 512;
1206
1207         /*
1208          * Init tasklets.
1209          */
1210         tasklet_init(&host->card_tasklet,
1211                 sdhci_tasklet_card, (unsigned long)host);
1212         tasklet_init(&host->finish_tasklet,
1213                 sdhci_tasklet_finish, (unsigned long)host);
1214
1215         setup_timer(&host->timer, sdhci_timeout_timer, (long)host);
1216
1217         ret = request_irq(host->irq, sdhci_irq, SA_SHIRQ,
1218                 host->slot_descr, host);
1219         if (ret)
1220                 goto untasklet;
1221
1222         sdhci_init(host);
1223
1224 #ifdef CONFIG_MMC_DEBUG
1225         sdhci_dumpregs(host);
1226 #endif
1227
1228         host->chip = chip;
1229         chip->hosts[slot] = host;
1230
1231         mmc_add_host(mmc);
1232
1233         printk(KERN_INFO "%s: SDHCI at 0x%08lx irq %d %s\n", mmc_hostname(mmc),
1234                 host->addr, host->irq,
1235                 (host->flags & SDHCI_USE_DMA)?"DMA":"PIO");
1236
1237         return 0;
1238
1239 untasklet:
1240         tasklet_kill(&host->card_tasklet);
1241         tasklet_kill(&host->finish_tasklet);
1242 unmap:
1243         iounmap(host->ioaddr);
1244 release:
1245         pci_release_region(pdev, host->bar);
1246 free:
1247         mmc_free_host(mmc);
1248
1249         return ret;
1250 }
1251
1252 static void sdhci_remove_slot(struct pci_dev *pdev, int slot)
1253 {
1254         struct sdhci_chip *chip;
1255         struct mmc_host *mmc;
1256         struct sdhci_host *host;
1257
1258         chip = pci_get_drvdata(pdev);
1259         host = chip->hosts[slot];
1260         mmc = host->mmc;
1261
1262         chip->hosts[slot] = NULL;
1263
1264         mmc_remove_host(mmc);
1265
1266         sdhci_reset(host, SDHCI_RESET_ALL);
1267
1268         free_irq(host->irq, host);
1269
1270         del_timer_sync(&host->timer);
1271
1272         tasklet_kill(&host->card_tasklet);
1273         tasklet_kill(&host->finish_tasklet);
1274
1275         iounmap(host->ioaddr);
1276
1277         pci_release_region(pdev, host->bar);
1278
1279         mmc_free_host(mmc);
1280 }
1281
1282 static int __devinit sdhci_probe(struct pci_dev *pdev,
1283         const struct pci_device_id *ent)
1284 {
1285         int ret, i;
1286         u8 slots, rev;
1287         struct sdhci_chip *chip;
1288
1289         BUG_ON(pdev == NULL);
1290         BUG_ON(ent == NULL);
1291
1292         pci_read_config_byte(pdev, PCI_CLASS_REVISION, &rev);
1293
1294         printk(KERN_INFO DRIVER_NAME
1295                 ": SDHCI controller found at %s [%04x:%04x] (rev %x)\n",
1296                 pci_name(pdev), (int)pdev->vendor, (int)pdev->device,
1297                 (int)rev);
1298
1299         ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &slots);
1300         if (ret)
1301                 return ret;
1302
1303         slots = PCI_SLOT_INFO_SLOTS(slots) + 1;
1304         DBG("found %d slot(s)\n", slots);
1305         if (slots == 0)
1306                 return -ENODEV;
1307
1308         ret = pci_enable_device(pdev);
1309         if (ret)
1310                 return ret;
1311
1312         chip = kzalloc(sizeof(struct sdhci_chip) +
1313                 sizeof(struct sdhci_host*) * slots, GFP_KERNEL);
1314         if (!chip) {
1315                 ret = -ENOMEM;
1316                 goto err;
1317         }
1318
1319         chip->pdev = pdev;
1320
1321         chip->num_slots = slots;
1322         pci_set_drvdata(pdev, chip);
1323
1324         for (i = 0;i < slots;i++) {
1325                 ret = sdhci_probe_slot(pdev, i);
1326                 if (ret) {
1327                         for (i--;i >= 0;i--)
1328                                 sdhci_remove_slot(pdev, i);
1329                         goto free;
1330                 }
1331         }
1332
1333         return 0;
1334
1335 free:
1336         pci_set_drvdata(pdev, NULL);
1337         kfree(chip);
1338
1339 err:
1340         pci_disable_device(pdev);
1341         return ret;
1342 }
1343
1344 static void __devexit sdhci_remove(struct pci_dev *pdev)
1345 {
1346         int i;
1347         struct sdhci_chip *chip;
1348
1349         chip = pci_get_drvdata(pdev);
1350
1351         if (chip) {
1352                 for (i = 0;i < chip->num_slots;i++)
1353                         sdhci_remove_slot(pdev, i);
1354
1355                 pci_set_drvdata(pdev, NULL);
1356
1357                 kfree(chip);
1358         }
1359
1360         pci_disable_device(pdev);
1361 }
1362
1363 static struct pci_driver sdhci_driver = {
1364         .name =         DRIVER_NAME,
1365         .id_table =     pci_ids,
1366         .probe =        sdhci_probe,
1367         .remove =       __devexit_p(sdhci_remove),
1368         .suspend =      sdhci_suspend,
1369         .resume =       sdhci_resume,
1370 };
1371
1372 /*****************************************************************************\
1373  *                                                                           *
1374  * Driver init/exit                                                          *
1375  *                                                                           *
1376 \*****************************************************************************/
1377
1378 static int __init sdhci_drv_init(void)
1379 {
1380         printk(KERN_INFO DRIVER_NAME
1381                 ": Secure Digital Host Controller Interface driver, "
1382                 DRIVER_VERSION "\n");
1383         printk(KERN_INFO DRIVER_NAME ": Copyright(c) Pierre Ossman\n");
1384
1385         return pci_register_driver(&sdhci_driver);
1386 }
1387
1388 static void __exit sdhci_drv_exit(void)
1389 {
1390         DBG("Exiting\n");
1391
1392         pci_unregister_driver(&sdhci_driver);
1393 }
1394
1395 module_init(sdhci_drv_init);
1396 module_exit(sdhci_drv_exit);
1397
1398 MODULE_AUTHOR("Pierre Ossman <drzeus@drzeus.cx>");
1399 MODULE_DESCRIPTION("Secure Digital Host Controller Interface driver");
1400 MODULE_VERSION(DRIVER_VERSION);
1401 MODULE_LICENSE("GPL");