err.no Git - linux-2.6/blob - drivers/mmc/sdhci.c

   1 /*
   2  *  linux/drivers/mmc/sdhci.c - Secure Digital Host Controller Interface driver
   3  *
   4  *  Copyright (C) 2005-2006 Pierre Ossman, All Rights Reserved.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <linux/delay.h>
  12 #include <linux/highmem.h>
  13 #include <linux/pci.h>
  14 #include <linux/dma-mapping.h>
  15
  16 #include <linux/mmc/host.h>
  17 #include <linux/mmc/protocol.h>
  18
  19 #include <asm/scatterlist.h>
  20
  21 #include "sdhci.h"
  22
  23 #define DRIVER_NAME "sdhci"
  24 #define DRIVER_VERSION "0.11"
  25
  26 #define BUGMAIL "<sdhci-devel@list.drzeus.cx>"
  27
  28 #define DBG(f, x...) \
  29         pr_debug(DRIVER_NAME " [%s()]: " f, __func__,## x)
  30
  31 static const struct pci_device_id pci_ids[] __devinitdata = {
  32         /* handle any SD host controller */
  33         {PCI_DEVICE_CLASS((PCI_CLASS_SYSTEM_SDHCI << 8), 0xFFFF00)},
  34         { /* end: all zeroes */ },
  35 };
  36
  37 MODULE_DEVICE_TABLE(pci, pci_ids);
  38
  39 static void sdhci_prepare_data(struct sdhci_host *, struct mmc_data *);
  40 static void sdhci_finish_data(struct sdhci_host *);
  41
  42 static void sdhci_send_command(struct sdhci_host *, struct mmc_command *);
  43 static void sdhci_finish_command(struct sdhci_host *);
  44
  45 static void sdhci_dumpregs(struct sdhci_host *host)
  46 {
  47         printk(KERN_DEBUG DRIVER_NAME ": ============== REGISTER DUMP ==============\n");
  48
  49         printk(KERN_DEBUG DRIVER_NAME ": Sys addr: 0x%08x | Version:  0x%08x\n",
  50                 readl(host->ioaddr + SDHCI_DMA_ADDRESS),
  51                 readw(host->ioaddr + SDHCI_HOST_VERSION));
  52         printk(KERN_DEBUG DRIVER_NAME ": Blk size: 0x%08x | Blk cnt:  0x%08x\n",
  53                 readw(host->ioaddr + SDHCI_BLOCK_SIZE),
  54                 readw(host->ioaddr + SDHCI_BLOCK_COUNT));
  55         printk(KERN_DEBUG DRIVER_NAME ": Argument: 0x%08x | Trn mode: 0x%08x\n",
  56                 readl(host->ioaddr + SDHCI_ARGUMENT),
  57                 readw(host->ioaddr + SDHCI_TRANSFER_MODE));
  58         printk(KERN_DEBUG DRIVER_NAME ": Present:  0x%08x | Host ctl: 0x%08x\n",
  59                 readl(host->ioaddr + SDHCI_PRESENT_STATE),
  60                 readb(host->ioaddr + SDHCI_HOST_CONTROL));
  61         printk(KERN_DEBUG DRIVER_NAME ": Power:    0x%08x | Blk gap:  0x%08x\n",
  62                 readb(host->ioaddr + SDHCI_POWER_CONTROL),
  63                 readb(host->ioaddr + SDHCI_BLOCK_GAP_CONTROL));
  64         printk(KERN_DEBUG DRIVER_NAME ": Wake-up:  0x%08x | Clock:    0x%08x\n",
  65                 readb(host->ioaddr + SDHCI_WALK_UP_CONTROL),
  66                 readw(host->ioaddr + SDHCI_CLOCK_CONTROL));
  67         printk(KERN_DEBUG DRIVER_NAME ": Timeout:  0x%08x | Int stat: 0x%08x\n",
  68                 readb(host->ioaddr + SDHCI_TIMEOUT_CONTROL),
  69                 readl(host->ioaddr + SDHCI_INT_STATUS));
  70         printk(KERN_DEBUG DRIVER_NAME ": Int enab: 0x%08x | Sig enab: 0x%08x\n",
  71                 readl(host->ioaddr + SDHCI_INT_ENABLE),
  72                 readl(host->ioaddr + SDHCI_SIGNAL_ENABLE));
  73         printk(KERN_DEBUG DRIVER_NAME ": AC12 err: 0x%08x | Slot int: 0x%08x\n",
  74                 readw(host->ioaddr + SDHCI_ACMD12_ERR),
  75                 readw(host->ioaddr + SDHCI_SLOT_INT_STATUS));
  76         printk(KERN_DEBUG DRIVER_NAME ": Caps:     0x%08x | Max curr: 0x%08x\n",
  77                 readl(host->ioaddr + SDHCI_CAPABILITIES),
  78                 readl(host->ioaddr + SDHCI_MAX_CURRENT));
  79
  80         printk(KERN_DEBUG DRIVER_NAME ": ===========================================\n");
  81 }
  82
  83 /*****************************************************************************\
  84  *                                                                           *
  85  * Low level functions                                                       *
  86  *                                                                           *
  87 \*****************************************************************************/
  88
  89 static void sdhci_reset(struct sdhci_host *host, u8 mask)
  90 {
  91         unsigned long timeout;
  92
  93         writeb(mask, host->ioaddr + SDHCI_SOFTWARE_RESET);
  94
  95         if (mask & SDHCI_RESET_ALL)
  96                 host->clock = 0;
  97
  98         /* Wait max 100 ms */
  99         timeout = 100;
 100
 101         /* hw clears the bit when it's done */
 102         while (readb(host->ioaddr + SDHCI_SOFTWARE_RESET) & mask) {
 103                 if (timeout == 0) {
 104                         printk(KERN_ERR "%s: Reset 0x%x never completed. "
 105                                 "Please report this to " BUGMAIL ".\n",
 106                                 mmc_hostname(host->mmc), (int)mask);
 107                         sdhci_dumpregs(host);
 108                         return;
 109                 }
 110                 timeout--;
 111                 mdelay(1);
 112         }
 113 }
 114
 115 static void sdhci_init(struct sdhci_host *host)
 116 {
 117         u32 intmask;
 118
 119         sdhci_reset(host, SDHCI_RESET_ALL);
 120
 121         intmask = SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT |
 122                 SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_INDEX |
 123                 SDHCI_INT_END_BIT | SDHCI_INT_CRC | SDHCI_INT_TIMEOUT |
 124                 SDHCI_INT_CARD_REMOVE | SDHCI_INT_CARD_INSERT |
 125                 SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL |
 126                 SDHCI_INT_DMA_END | SDHCI_INT_DATA_END | SDHCI_INT_RESPONSE;
 127
 128         writel(intmask, host->ioaddr + SDHCI_INT_ENABLE);
 129         writel(intmask, host->ioaddr + SDHCI_SIGNAL_ENABLE);
 130 }
 131
 132 static void sdhci_activate_led(struct sdhci_host *host)
 133 {
 134         u8 ctrl;
 135
 136         ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
 137         ctrl |= SDHCI_CTRL_LED;
 138         writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
 139 }
 140
 141 static void sdhci_deactivate_led(struct sdhci_host *host)
 142 {
 143         u8 ctrl;
 144
 145         ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
 146         ctrl &= ~SDHCI_CTRL_LED;
 147         writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
 148 }
 149
 150 /*****************************************************************************\
 151  *                                                                           *
 152  * Core functions                                                            *
 153  *                                                                           *
 154 \*****************************************************************************/
 155
 156 static inline char* sdhci_kmap_sg(struct sdhci_host* host)
 157 {
 158         host->mapped_sg = kmap_atomic(host->cur_sg->page, KM_BIO_SRC_IRQ);
 159         return host->mapped_sg + host->cur_sg->offset;
 160 }
 161
 162 static inline void sdhci_kunmap_sg(struct sdhci_host* host)
 163 {
 164         kunmap_atomic(host->mapped_sg, KM_BIO_SRC_IRQ);
 165 }
 166
 167 static inline int sdhci_next_sg(struct sdhci_host* host)
 168 {
 169         /*
 170          * Skip to next SG entry.
 171          */
 172         host->cur_sg++;
 173         host->num_sg--;
 174
 175         /*
 176          * Any entries left?
 177          */
 178         if (host->num_sg > 0) {
 179                 host->offset = 0;
 180                 host->remain = host->cur_sg->length;
 181         }
 182
 183         return host->num_sg;
 184 }
 185
 186 static void sdhci_read_block_pio(struct sdhci_host *host)
 187 {
 188         int blksize, chunk_remain;
 189         u32 data;
 190         char *buffer;
 191         int size;
 192
 193         DBG("PIO reading\n");
 194
 195         blksize = host->data->blksz;
 196         chunk_remain = 0;
 197         data = 0;
 198
 199         buffer = sdhci_kmap_sg(host) + host->offset;
 200
 201         while (blksize) {
 202                 if (chunk_remain == 0) {
 203                         data = readl(host->ioaddr + SDHCI_BUFFER);
 204                         chunk_remain = min(blksize, 4);
 205                 }
 206
 207                 size = min(host->size, host->remain);
 208                 size = min(size, chunk_remain);
 209
 210                 chunk_remain -= size;
 211                 blksize -= size;
 212                 host->offset += size;
 213                 host->remain -= size;
 214                 host->size -= size;
 215                 while (size) {
 216                         *buffer = data & 0xFF;
 217                         buffer++;
 218                         data >>= 8;
 219                         size--;
 220                 }
 221
 222                 if (host->remain == 0) {
 223                         sdhci_kunmap_sg(host);
 224                         if (sdhci_next_sg(host) == 0) {
 225                                 BUG_ON(blksize != 0);
 226                                 return;
 227                         }
 228                         buffer = sdhci_kmap_sg(host);
 229                 }
 230         }
 231
 232         sdhci_kunmap_sg(host);
 233 }
 234
 235 static void sdhci_write_block_pio(struct sdhci_host *host)
 236 {
 237         int blksize, chunk_remain;
 238         u32 data;
 239         char *buffer;
 240         int bytes, size;
 241
 242         DBG("PIO writing\n");
 243
 244         blksize = host->data->blksz;
 245         chunk_remain = 4;
 246         data = 0;
 247
 248         bytes = 0;
 249         buffer = sdhci_kmap_sg(host) + host->offset;
 250
 251         while (blksize) {
 252                 size = min(host->size, host->remain);
 253                 size = min(size, chunk_remain);
 254
 255                 chunk_remain -= size;
 256                 blksize -= size;
 257                 host->offset += size;
 258                 host->remain -= size;
 259                 host->size -= size;
 260                 while (size) {
 261                         data >>= 8;
 262                         data |= (u32)*buffer << 24;
 263                         buffer++;
 264                         size--;
 265                 }
 266
 267                 if (chunk_remain == 0) {
 268                         writel(data, host->ioaddr + SDHCI_BUFFER);
 269                         chunk_remain = min(blksize, 4);
 270                 }
 271
 272                 if (host->remain == 0) {
 273                         sdhci_kunmap_sg(host);
 274                         if (sdhci_next_sg(host) == 0) {
 275                                 BUG_ON(blksize != 0);
 276                                 return;
 277                         }
 278                         buffer = sdhci_kmap_sg(host);
 279                 }
 280         }
 281
 282         sdhci_kunmap_sg(host);
 283 }
 284
 285 static void sdhci_transfer_pio(struct sdhci_host *host)
 286 {
 287         u32 mask;
 288
 289         BUG_ON(!host->data);
 290
 291         if (host->size == 0)
 292                 return;
 293
 294         if (host->data->flags & MMC_DATA_READ)
 295                 mask = SDHCI_DATA_AVAILABLE;
 296         else
 297                 mask = SDHCI_SPACE_AVAILABLE;
 298
 299         while (readl(host->ioaddr + SDHCI_PRESENT_STATE) & mask) {
 300                 if (host->data->flags & MMC_DATA_READ)
 301                         sdhci_read_block_pio(host);
 302                 else
 303                         sdhci_write_block_pio(host);
 304
 305                 if (host->size == 0)
 306                         break;
 307
 308                 BUG_ON(host->num_sg == 0);
 309         }
 310
 311         DBG("PIO transfer complete.\n");
 312 }
 313
 314 static void sdhci_prepare_data(struct sdhci_host *host, struct mmc_data *data)
 315 {
 316         u8 count;
 317         unsigned target_timeout, current_timeout;
 318
 319         WARN_ON(host->data);
 320
 321         if (data == NULL)
 322                 return;
 323
 324         DBG("blksz %04x blks %04x flags %08x\n",
 325                 data->blksz, data->blocks, data->flags);
 326         DBG("tsac %d ms nsac %d clk\n",
 327                 data->timeout_ns / 1000000, data->timeout_clks);
 328
 329         /* Sanity checks */
 330         BUG_ON(data->blksz * data->blocks > 524288);
 331         BUG_ON(data->blksz > host->max_block);
 332         BUG_ON(data->blocks > 65535);
 333
 334         /* timeout in us */
 335         target_timeout = data->timeout_ns / 1000 +
 336                 data->timeout_clks / host->clock;
 337
 338         /*
 339          * Figure out needed cycles.
 340          * We do this in steps in order to fit inside a 32 bit int.
 341          * The first step is the minimum timeout, which will have a
 342          * minimum resolution of 6 bits:
 343          * (1) 2^13*1000 > 2^22,
 344          * (2) host->timeout_clk < 2^16
 345          *     =>
 346          *     (1) / (2) > 2^6
 347          */
 348         count = 0;
 349         current_timeout = (1 << 13) * 1000 / host->timeout_clk;
 350         while (current_timeout < target_timeout) {
 351                 count++;
 352                 current_timeout <<= 1;
 353                 if (count >= 0xF)
 354                         break;
 355         }
 356
 357         if (count >= 0xF) {
 358                 printk(KERN_WARNING "%s: Too large timeout requested!\n",
 359                         mmc_hostname(host->mmc));
 360                 count = 0xE;
 361         }
 362
 363         writeb(count, host->ioaddr + SDHCI_TIMEOUT_CONTROL);
 364
 365         if (host->flags & SDHCI_USE_DMA) {
 366                 int count;
 367
 368                 count = pci_map_sg(host->chip->pdev, data->sg, data->sg_len,
 369                         (data->flags & MMC_DATA_READ)?PCI_DMA_FROMDEVICE:PCI_DMA_TODEVICE);
 370                 BUG_ON(count != 1);
 371
 372                 writel(sg_dma_address(data->sg), host->ioaddr + SDHCI_DMA_ADDRESS);
 373         } else {
 374                 host->size = data->blksz * data->blocks;
 375
 376                 host->cur_sg = data->sg;
 377                 host->num_sg = data->sg_len;
 378
 379                 host->offset = 0;
 380                 host->remain = host->cur_sg->length;
 381         }
 382
 383         /* We do not handle DMA boundaries, so set it to max (512 KiB) */
 384         writew(SDHCI_MAKE_BLKSZ(7, data->blksz),
 385                 host->ioaddr + SDHCI_BLOCK_SIZE);
 386         writew(data->blocks, host->ioaddr + SDHCI_BLOCK_COUNT);
 387 }
 388
 389 static void sdhci_set_transfer_mode(struct sdhci_host *host,
 390         struct mmc_data *data)
 391 {
 392         u16 mode;
 393
 394         WARN_ON(host->data);
 395
 396         if (data == NULL)
 397                 return;
 398
 399         mode = SDHCI_TRNS_BLK_CNT_EN;
 400         if (data->blocks > 1)
 401                 mode |= SDHCI_TRNS_MULTI;
 402         if (data->flags & MMC_DATA_READ)
 403                 mode |= SDHCI_TRNS_READ;
 404         if (host->flags & SDHCI_USE_DMA)
 405                 mode |= SDHCI_TRNS_DMA;
 406
 407         writew(mode, host->ioaddr + SDHCI_TRANSFER_MODE);
 408 }
 409
 410 static void sdhci_finish_data(struct sdhci_host *host)
 411 {
 412         struct mmc_data *data;
 413         u16 blocks;
 414
 415         BUG_ON(!host->data);
 416
 417         data = host->data;
 418         host->data = NULL;
 419
 420         if (host->flags & SDHCI_USE_DMA) {
 421                 pci_unmap_sg(host->chip->pdev, data->sg, data->sg_len,
 422                         (data->flags & MMC_DATA_READ)?PCI_DMA_FROMDEVICE:PCI_DMA_TODEVICE);
 423         }
 424
 425         /*
 426          * Controller doesn't count down when in single block mode.
 427          */
 428         if ((data->blocks == 1) && (data->error == MMC_ERR_NONE))
 429                 blocks = 0;
 430         else
 431                 blocks = readw(host->ioaddr + SDHCI_BLOCK_COUNT);
 432         data->bytes_xfered = data->blksz * (data->blocks - blocks);
 433
 434         if ((data->error == MMC_ERR_NONE) && blocks) {
 435                 printk(KERN_ERR "%s: Controller signalled completion even "
 436                         "though there were blocks left. Please report this "
 437                         "to " BUGMAIL ".\n", mmc_hostname(host->mmc));
 438                 data->error = MMC_ERR_FAILED;
 439         }
 440
 441         if (host->size != 0) {
 442                 printk(KERN_ERR "%s: %d bytes were left untransferred. "
 443                         "Please report this to " BUGMAIL ".\n",
 444                         mmc_hostname(host->mmc), host->size);
 445                 data->error = MMC_ERR_FAILED;
 446         }
 447
 448         DBG("Ending data transfer (%d bytes)\n", data->bytes_xfered);
 449
 450         if (data->stop) {
 451                 /*
 452                  * The controller needs a reset of internal state machines
 453                  * upon error conditions.
 454                  */
 455                 if (data->error != MMC_ERR_NONE) {
 456                         sdhci_reset(host, SDHCI_RESET_CMD);
 457                         sdhci_reset(host, SDHCI_RESET_DATA);
 458                 }
 459
 460                 sdhci_send_command(host, data->stop);
 461         } else
 462                 tasklet_schedule(&host->finish_tasklet);
 463 }
 464
 465 static void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
 466 {
 467         int flags;
 468         unsigned long timeout;
 469
 470         WARN_ON(host->cmd);
 471
 472         DBG("Sending cmd (%x)\n", cmd->opcode);
 473
 474         /* Wait max 10 ms */
 475         timeout = 10;
 476         while (readl(host->ioaddr + SDHCI_PRESENT_STATE) &
 477                 (SDHCI_CMD_INHIBIT | SDHCI_DATA_INHIBIT)) {
 478                 if (timeout == 0) {
 479                         printk(KERN_ERR "%s: Controller never released "
 480                                 "inhibit bits. Please report this to "
 481                                 BUGMAIL ".\n", mmc_hostname(host->mmc));
 482                         sdhci_dumpregs(host);
 483                         cmd->error = MMC_ERR_FAILED;
 484                         tasklet_schedule(&host->finish_tasklet);
 485                         return;
 486                 }
 487                 timeout--;
 488                 mdelay(1);
 489         }
 490
 491         mod_timer(&host->timer, jiffies + 10 * HZ);
 492
 493         host->cmd = cmd;
 494
 495         sdhci_prepare_data(host, cmd->data);
 496
 497         writel(cmd->arg, host->ioaddr + SDHCI_ARGUMENT);
 498
 499         sdhci_set_transfer_mode(host, cmd->data);
 500
 501         if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) {
 502                 printk(KERN_ERR "%s: Unsupported response type! "
 503                         "Please report this to " BUGMAIL ".\n",
 504                         mmc_hostname(host->mmc));
 505                 cmd->error = MMC_ERR_INVALID;
 506                 tasklet_schedule(&host->finish_tasklet);
 507                 return;
 508         }
 509
 510         if (!(cmd->flags & MMC_RSP_PRESENT))
 511                 flags = SDHCI_CMD_RESP_NONE;
 512         else if (cmd->flags & MMC_RSP_136)
 513                 flags = SDHCI_CMD_RESP_LONG;
 514         else if (cmd->flags & MMC_RSP_BUSY)
 515                 flags = SDHCI_CMD_RESP_SHORT_BUSY;
 516         else
 517                 flags = SDHCI_CMD_RESP_SHORT;
 518
 519         if (cmd->flags & MMC_RSP_CRC)
 520                 flags |= SDHCI_CMD_CRC;
 521         if (cmd->flags & MMC_RSP_OPCODE)
 522                 flags |= SDHCI_CMD_INDEX;
 523         if (cmd->data)
 524                 flags |= SDHCI_CMD_DATA;
 525
 526         writel(SDHCI_MAKE_CMD(cmd->opcode, flags),
 527                 host->ioaddr + SDHCI_COMMAND);
 528 }
 529
 530 static void sdhci_finish_command(struct sdhci_host *host)
 531 {
 532         int i;
 533
 534         BUG_ON(host->cmd == NULL);
 535
 536         if (host->cmd->flags & MMC_RSP_PRESENT) {
 537                 if (host->cmd->flags & MMC_RSP_136) {
 538                         /* CRC is stripped so we need to do some shifting. */
 539                         for (i = 0;i < 4;i++) {
 540                                 host->cmd->resp[i] = readl(host->ioaddr +
 541                                         SDHCI_RESPONSE + (3-i)*4) << 8;
 542                                 if (i != 3)
 543                                         host->cmd->resp[i] |=
 544                                                 readb(host->ioaddr +
 545                                                 SDHCI_RESPONSE + (3-i)*4-1);
 546                         }
 547                 } else {
 548                         host->cmd->resp[0] = readl(host->ioaddr + SDHCI_RESPONSE);
 549                 }
 550         }
 551
 552         host->cmd->error = MMC_ERR_NONE;
 553
 554         DBG("Ending cmd (%x)\n", host->cmd->opcode);
 555
 556         if (host->cmd->data)
 557                 host->data = host->cmd->data;
 558         else
 559                 tasklet_schedule(&host->finish_tasklet);
 560
 561         host->cmd = NULL;
 562 }
 563
 564 static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
 565 {
 566         int div;
 567         u16 clk;
 568         unsigned long timeout;
 569
 570         if (clock == host->clock)
 571                 return;
 572
 573         writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL);
 574
 575         if (clock == 0)
 576                 goto out;
 577
 578         for (div = 1;div < 256;div *= 2) {
 579                 if ((host->max_clk / div) <= clock)
 580                         break;
 581         }
 582         div >>= 1;
 583
 584         clk = div << SDHCI_DIVIDER_SHIFT;
 585         clk |= SDHCI_CLOCK_INT_EN;
 586         writew(clk, host->ioaddr + SDHCI_CLOCK_CONTROL);
 587
 588         /* Wait max 10 ms */
 589         timeout = 10;
 590         while (!((clk = readw(host->ioaddr + SDHCI_CLOCK_CONTROL))
 591                 & SDHCI_CLOCK_INT_STABLE)) {
 592                 if (timeout == 0) {
 593                         printk(KERN_ERR "%s: Internal clock never stabilised. "
 594                                 "Please report this to " BUGMAIL ".\n",
 595                                 mmc_hostname(host->mmc));
 596                         sdhci_dumpregs(host);
 597                         return;
 598                 }
 599                 timeout--;
 600                 mdelay(1);
 601         }
 602
 603         clk |= SDHCI_CLOCK_CARD_EN;
 604         writew(clk, host->ioaddr + SDHCI_CLOCK_CONTROL);
 605
 606 out:
 607         host->clock = clock;
 608 }
 609
 610 static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
 611 {
 612         u8 pwr;
 613
 614         if (host->power == power)
 615                 return;
 616
 617         writeb(0, host->ioaddr + SDHCI_POWER_CONTROL);
 618
 619         if (power == (unsigned short)-1)
 620                 goto out;
 621
 622         pwr = SDHCI_POWER_ON;
 623
 624         switch (power) {
 625         case MMC_VDD_170:
 626         case MMC_VDD_180:
 627         case MMC_VDD_190:
 628                 pwr |= SDHCI_POWER_180;
 629                 break;
 630         case MMC_VDD_290:
 631         case MMC_VDD_300:
 632         case MMC_VDD_310:
 633                 pwr |= SDHCI_POWER_300;
 634                 break;
 635         case MMC_VDD_320:
 636         case MMC_VDD_330:
 637         case MMC_VDD_340:
 638                 pwr |= SDHCI_POWER_330;
 639                 break;
 640         default:
 641                 BUG();
 642         }
 643
 644         writeb(pwr, host->ioaddr + SDHCI_POWER_CONTROL);
 645
 646 out:
 647         host->power = power;
 648 }
 649
 650 /*****************************************************************************\
 651  *                                                                           *
 652  * MMC callbacks                                                             *
 653  *                                                                           *
 654 \*****************************************************************************/
 655
 656 static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
 657 {
 658         struct sdhci_host *host;
 659         unsigned long flags;
 660
 661         host = mmc_priv(mmc);
 662
 663         spin_lock_irqsave(&host->lock, flags);
 664
 665         WARN_ON(host->mrq != NULL);
 666
 667         sdhci_activate_led(host);
 668
 669         host->mrq = mrq;
 670
 671         if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
 672                 host->mrq->cmd->error = MMC_ERR_TIMEOUT;
 673                 tasklet_schedule(&host->finish_tasklet);
 674         } else
 675                 sdhci_send_command(host, mrq->cmd);
 676
 677         spin_unlock_irqrestore(&host->lock, flags);
 678 }
 679
 680 static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 681 {
 682         struct sdhci_host *host;
 683         unsigned long flags;
 684         u8 ctrl;
 685
 686         host = mmc_priv(mmc);
 687
 688         spin_lock_irqsave(&host->lock, flags);
 689
 690         /*
 691          * Reset the chip on each power off.
 692          * Should clear out any weird states.
 693          */
 694         if (ios->power_mode == MMC_POWER_OFF) {
 695                 writel(0, host->ioaddr + SDHCI_SIGNAL_ENABLE);
 696                 sdhci_init(host);
 697         }
 698
 699         sdhci_set_clock(host, ios->clock);
 700
 701         if (ios->power_mode == MMC_POWER_OFF)
 702                 sdhci_set_power(host, -1);
 703         else
 704                 sdhci_set_power(host, ios->vdd);
 705
 706         ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
 707         if (ios->bus_width == MMC_BUS_WIDTH_4)
 708                 ctrl |= SDHCI_CTRL_4BITBUS;
 709         else
 710                 ctrl &= ~SDHCI_CTRL_4BITBUS;
 711         writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
 712
 713         spin_unlock_irqrestore(&host->lock, flags);
 714 }
 715
 716 static int sdhci_get_ro(struct mmc_host *mmc)
 717 {
 718         struct sdhci_host *host;
 719         unsigned long flags;
 720         int present;
 721
 722         host = mmc_priv(mmc);
 723
 724         spin_lock_irqsave(&host->lock, flags);
 725
 726         present = readl(host->ioaddr + SDHCI_PRESENT_STATE);
 727
 728         spin_unlock_irqrestore(&host->lock, flags);
 729
 730         return !(present & SDHCI_WRITE_PROTECT);
 731 }
 732
 733 static struct mmc_host_ops sdhci_ops = {
 734         .request        = sdhci_request,
 735         .set_ios        = sdhci_set_ios,
 736         .get_ro         = sdhci_get_ro,
 737 };
 738
 739 /*****************************************************************************\
 740  *                                                                           *
 741  * Tasklets                                                                  *
 742  *                                                                           *
 743 \*****************************************************************************/
 744
 745 static void sdhci_tasklet_card(unsigned long param)
 746 {
 747         struct sdhci_host *host;
 748         unsigned long flags;
 749
 750         host = (struct sdhci_host*)param;
 751
 752         spin_lock_irqsave(&host->lock, flags);
 753
 754         if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
 755                 if (host->mrq) {
 756                         printk(KERN_ERR "%s: Card removed during transfer!\n",
 757                                 mmc_hostname(host->mmc));
 758                         printk(KERN_ERR "%s: Resetting controller.\n",
 759                                 mmc_hostname(host->mmc));
 760
 761                         sdhci_reset(host, SDHCI_RESET_CMD);
 762                         sdhci_reset(host, SDHCI_RESET_DATA);
 763
 764                         host->mrq->cmd->error = MMC_ERR_FAILED;
 765                         tasklet_schedule(&host->finish_tasklet);
 766                 }
 767         }
 768
 769         spin_unlock_irqrestore(&host->lock, flags);
 770
 771         mmc_detect_change(host->mmc, msecs_to_jiffies(500));
 772 }
 773
 774 static void sdhci_tasklet_finish(unsigned long param)
 775 {
 776         struct sdhci_host *host;
 777         unsigned long flags;
 778         struct mmc_request *mrq;
 779
 780         host = (struct sdhci_host*)param;
 781
 782         spin_lock_irqsave(&host->lock, flags);
 783
 784         del_timer(&host->timer);
 785
 786         mrq = host->mrq;
 787
 788         DBG("Ending request, cmd (%x)\n", mrq->cmd->opcode);
 789
 790         /*
 791          * The controller needs a reset of internal state machines
 792          * upon error conditions.
 793          */
 794         if ((mrq->cmd->error != MMC_ERR_NONE) ||
 795                 (mrq->data && ((mrq->data->error != MMC_ERR_NONE) ||
 796                 (mrq->data->stop && (mrq->data->stop->error != MMC_ERR_NONE))))) {
 797                 sdhci_reset(host, SDHCI_RESET_CMD);
 798                 sdhci_reset(host, SDHCI_RESET_DATA);
 799         }
 800
 801         host->mrq = NULL;
 802         host->cmd = NULL;
 803         host->data = NULL;
 804
 805         sdhci_deactivate_led(host);
 806
 807         spin_unlock_irqrestore(&host->lock, flags);
 808
 809         mmc_request_done(host->mmc, mrq);
 810 }
 811
 812 static void sdhci_timeout_timer(unsigned long data)
 813 {
 814         struct sdhci_host *host;
 815         unsigned long flags;
 816
 817         host = (struct sdhci_host*)data;
 818
 819         spin_lock_irqsave(&host->lock, flags);
 820
 821         if (host->mrq) {
 822                 printk(KERN_ERR "%s: Timeout waiting for hardware interrupt. "
 823                         "Please report this to " BUGMAIL ".\n",
 824                         mmc_hostname(host->mmc));
 825                 sdhci_dumpregs(host);
 826
 827                 if (host->data) {
 828                         host->data->error = MMC_ERR_TIMEOUT;
 829                         sdhci_finish_data(host);
 830                 } else {
 831                         if (host->cmd)
 832                                 host->cmd->error = MMC_ERR_TIMEOUT;
 833                         else
 834                                 host->mrq->cmd->error = MMC_ERR_TIMEOUT;
 835
 836                         tasklet_schedule(&host->finish_tasklet);
 837                 }
 838         }
 839
 840         spin_unlock_irqrestore(&host->lock, flags);
 841 }
 842
 843 /*****************************************************************************\
 844  *                                                                           *
 845  * Interrupt handling                                                        *
 846  *                                                                           *
 847 \*****************************************************************************/
 848
 849 static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask)
 850 {
 851         BUG_ON(intmask == 0);
 852
 853         if (!host->cmd) {
 854                 printk(KERN_ERR "%s: Got command interrupt even though no "
 855                         "command operation was in progress.\n",
 856                         mmc_hostname(host->mmc));
 857                 printk(KERN_ERR "%s: Please report this to " BUGMAIL ".\n",
 858                         mmc_hostname(host->mmc));
 859                 sdhci_dumpregs(host);
 860                 return;
 861         }
 862
 863         if (intmask & SDHCI_INT_RESPONSE)
 864                 sdhci_finish_command(host);
 865         else {
 866                 if (intmask & SDHCI_INT_TIMEOUT)
 867                         host->cmd->error = MMC_ERR_TIMEOUT;
 868                 else if (intmask & SDHCI_INT_CRC)
 869                         host->cmd->error = MMC_ERR_BADCRC;
 870                 else if (intmask & (SDHCI_INT_END_BIT | SDHCI_INT_INDEX))
 871                         host->cmd->error = MMC_ERR_FAILED;
 872                 else
 873                         host->cmd->error = MMC_ERR_INVALID;
 874
 875                 tasklet_schedule(&host->finish_tasklet);
 876         }
 877 }
 878
 879 static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
 880 {
 881         BUG_ON(intmask == 0);
 882
 883         if (!host->data) {
 884                 /*
 885                  * A data end interrupt is sent together with the response
 886                  * for the stop command.
 887                  */
 888                 if (intmask & SDHCI_INT_DATA_END)
 889                         return;
 890
 891                 printk(KERN_ERR "%s: Got data interrupt even though no "
 892                         "data operation was in progress.\n",
 893                         mmc_hostname(host->mmc));
 894                 printk(KERN_ERR "%s: Please report this to " BUGMAIL ".\n",
 895                         mmc_hostname(host->mmc));
 896                 sdhci_dumpregs(host);
 897
 898                 return;
 899         }
 900
 901         if (intmask & SDHCI_INT_DATA_TIMEOUT)
 902                 host->data->error = MMC_ERR_TIMEOUT;
 903         else if (intmask & SDHCI_INT_DATA_CRC)
 904                 host->data->error = MMC_ERR_BADCRC;
 905         else if (intmask & SDHCI_INT_DATA_END_BIT)
 906                 host->data->error = MMC_ERR_FAILED;
 907
 908         if (host->data->error != MMC_ERR_NONE)
 909                 sdhci_finish_data(host);
 910         else {
 911                 if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL))
 912                         sdhci_transfer_pio(host);
 913
 914                 if (intmask & SDHCI_INT_DATA_END)
 915                         sdhci_finish_data(host);
 916         }
 917 }
 918
 919 static irqreturn_t sdhci_irq(int irq, void *dev_id, struct pt_regs *regs)
 920 {
 921         irqreturn_t result;
 922         struct sdhci_host* host = dev_id;
 923         u32 intmask;
 924
 925         spin_lock(&host->lock);
 926
 927         intmask = readl(host->ioaddr + SDHCI_INT_STATUS);
 928
 929         if (!intmask) {
 930                 result = IRQ_NONE;
 931                 goto out;
 932         }
 933
 934         DBG("*** %s got interrupt: 0x%08x\n", host->slot_descr, intmask);
 935
 936         if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) {
 937                 writel(intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE),
 938                         host->ioaddr + SDHCI_INT_STATUS);
 939                 tasklet_schedule(&host->card_tasklet);
 940         }
 941
 942         intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE);
 943
 944         if (intmask & SDHCI_INT_CMD_MASK) {
 945                 writel(intmask & SDHCI_INT_CMD_MASK,
 946                         host->ioaddr + SDHCI_INT_STATUS);
 947                 sdhci_cmd_irq(host, intmask & SDHCI_INT_CMD_MASK);
 948         }
 949
 950         if (intmask & SDHCI_INT_DATA_MASK) {
 951                 writel(intmask & SDHCI_INT_DATA_MASK,
 952                         host->ioaddr + SDHCI_INT_STATUS);
 953                 sdhci_data_irq(host, intmask & SDHCI_INT_DATA_MASK);
 954         }
 955
 956         intmask &= ~(SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK);
 957
 958         if (intmask & SDHCI_INT_BUS_POWER) {
 959                 printk(KERN_ERR "%s: Card is consuming too much power!\n",
 960                         mmc_hostname(host->mmc));
 961                 writel(SDHCI_INT_BUS_POWER, host->ioaddr + SDHCI_INT_STATUS);
 962         }
 963
 964         intmask &= SDHCI_INT_BUS_POWER;
 965
 966         if (intmask) {
 967                 printk(KERN_ERR "%s: Unexpected interrupt 0x%08x. Please "
 968                         "report this to " BUGMAIL ".\n",
 969                         mmc_hostname(host->mmc), intmask);
 970                 sdhci_dumpregs(host);
 971
 972                 writel(intmask, host->ioaddr + SDHCI_INT_STATUS);
 973         }
 974
 975         result = IRQ_HANDLED;
 976
 977 out:
 978         spin_unlock(&host->lock);
 979
 980         return result;
 981 }
 982
 983 /*****************************************************************************\
 984  *                                                                           *
 985  * Suspend/resume                                                            *
 986  *                                                                           *
 987 \*****************************************************************************/
 988
 989 #ifdef CONFIG_PM
 990
 991 static int sdhci_suspend (struct pci_dev *pdev, pm_message_t state)
 992 {
 993         struct sdhci_chip *chip;
 994         int i, ret;
 995
 996         chip = pci_get_drvdata(pdev);
 997         if (!chip)
 998                 return 0;
 999
1000         DBG("Suspending...\n");
1001
1002         for (i = 0;i < chip->num_slots;i++) {
1003                 if (!chip->hosts[i])
1004                         continue;
1005                 ret = mmc_suspend_host(chip->hosts[i]->mmc, state);
1006                 if (ret) {
1007                         for (i--;i >= 0;i--)
1008                                 mmc_resume_host(chip->hosts[i]->mmc);
1009                         return ret;
1010                 }
1011         }
1012
1013         pci_save_state(pdev);
1014         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
1015         pci_disable_device(pdev);
1016         pci_set_power_state(pdev, pci_choose_state(pdev, state));
1017
1018         return 0;
1019 }
1020
1021 static int sdhci_resume (struct pci_dev *pdev)
1022 {
1023         struct sdhci_chip *chip;
1024         int i, ret;
1025
1026         chip = pci_get_drvdata(pdev);
1027         if (!chip)
1028                 return 0;
1029
1030         DBG("Resuming...\n");
1031
1032         pci_set_power_state(pdev, PCI_D0);
1033         pci_restore_state(pdev);
1034         pci_enable_device(pdev);
1035
1036         for (i = 0;i < chip->num_slots;i++) {
1037                 if (!chip->hosts[i])
1038                         continue;
1039                 if (chip->hosts[i]->flags & SDHCI_USE_DMA)
1040                         pci_set_master(pdev);
1041                 sdhci_init(chip->hosts[i]);
1042                 ret = mmc_resume_host(chip->hosts[i]->mmc);
1043                 if (ret)
1044                         return ret;
1045         }
1046
1047         return 0;
1048 }
1049
1050 #else /* CONFIG_PM */
1051
1052 #define sdhci_suspend NULL
1053 #define sdhci_resume NULL
1054
1055 #endif /* CONFIG_PM */
1056
1057 /*****************************************************************************\
1058  *                                                                           *
1059  * Device probing/removal                                                    *
1060  *                                                                           *
1061 \*****************************************************************************/
1062
1063 static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
1064 {
1065         int ret;
1066         struct sdhci_chip *chip;
1067         struct mmc_host *mmc;
1068         struct sdhci_host *host;
1069
1070         u8 first_bar;
1071         unsigned int caps;
1072
1073         chip = pci_get_drvdata(pdev);
1074         BUG_ON(!chip);
1075
1076         ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &first_bar);
1077         if (ret)
1078                 return ret;
1079
1080         first_bar &= PCI_SLOT_INFO_FIRST_BAR_MASK;
1081
1082         if (first_bar > 5) {
1083                 printk(KERN_ERR DRIVER_NAME ": Invalid first BAR. Aborting.\n");
1084                 return -ENODEV;
1085         }
1086
1087         if (!(pci_resource_flags(pdev, first_bar + slot) & IORESOURCE_MEM)) {
1088                 printk(KERN_ERR DRIVER_NAME ": BAR is not iomem. Aborting.\n");
1089                 return -ENODEV;
1090         }
1091
1092         if (pci_resource_len(pdev, first_bar + slot) != 0x100) {
1093                 printk(KERN_ERR DRIVER_NAME ": Invalid iomem size. Aborting.\n");
1094                 return -ENODEV;
1095         }
1096
1097         mmc = mmc_alloc_host(sizeof(struct sdhci_host), &pdev->dev);
1098         if (!mmc)
1099                 return -ENOMEM;
1100
1101         host = mmc_priv(mmc);
1102         host->mmc = mmc;
1103
1104         host->bar = first_bar + slot;
1105
1106         host->addr = pci_resource_start(pdev, host->bar);
1107         host->irq = pdev->irq;
1108
1109         DBG("slot %d at 0x%08lx, irq %d\n", slot, host->addr, host->irq);
1110
1111         snprintf(host->slot_descr, 20, "sdhci:slot%d", slot);
1112
1113         ret = pci_request_region(pdev, host->bar, host->slot_descr);
1114         if (ret)
1115                 goto free;
1116
1117         host->ioaddr = ioremap_nocache(host->addr,
1118                 pci_resource_len(pdev, host->bar));
1119         if (!host->ioaddr) {
1120                 ret = -ENOMEM;
1121                 goto release;
1122         }
1123
1124         caps = readl(host->ioaddr + SDHCI_CAPABILITIES);
1125
1126         if ((caps & SDHCI_CAN_DO_DMA) && ((pdev->class & 0x0000FF) == 0x01))
1127                 host->flags |= SDHCI_USE_DMA;
1128
1129         if (host->flags & SDHCI_USE_DMA) {
1130                 if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
1131                         printk(KERN_WARNING "%s: No suitable DMA available. "
1132                                 "Falling back to PIO.\n", host->slot_descr);
1133                         host->flags &= ~SDHCI_USE_DMA;
1134                 }
1135         }
1136
1137         if (host->flags & SDHCI_USE_DMA)
1138                 pci_set_master(pdev);
1139         else /* XXX: Hack to get MMC layer to avoid highmem */
1140                 pdev->dma_mask = 0;
1141
1142         host->max_clk =
1143                 (caps & SDHCI_CLOCK_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT;
1144         if (host->max_clk == 0) {
1145                 printk(KERN_ERR "%s: Hardware doesn't specify base clock "
1146                         "frequency.\n", host->slot_descr);
1147                 ret = -ENODEV;
1148                 goto unmap;
1149         }
1150         host->max_clk *= 1000000;
1151
1152         host->timeout_clk =
1153                 (caps & SDHCI_TIMEOUT_CLK_MASK) >> SDHCI_TIMEOUT_CLK_SHIFT;
1154         if (host->timeout_clk == 0) {
1155                 printk(KERN_ERR "%s: Hardware doesn't specify timeout clock "
1156                         "frequency.\n", host->slot_descr);
1157                 ret = -ENODEV;
1158                 goto unmap;
1159         }
1160         if (caps & SDHCI_TIMEOUT_CLK_UNIT)
1161                 host->timeout_clk *= 1000;
1162
1163         host->max_block = (caps & SDHCI_MAX_BLOCK_MASK) >> SDHCI_MAX_BLOCK_SHIFT;
1164         if (host->max_block >= 3) {
1165                 printk(KERN_ERR "%s: Invalid maximum block size.\n",
1166                         host->slot_descr);
1167                 ret = -ENODEV;
1168                 goto unmap;
1169         }
1170         host->max_block = 512 << host->max_block;
1171
1172         /*
1173          * Set host parameters.
1174          */
1175         mmc->ops = &sdhci_ops;
1176         mmc->f_min = host->max_clk / 256;
1177         mmc->f_max = host->max_clk;
1178         mmc->caps = MMC_CAP_4_BIT_DATA;
1179
1180         mmc->ocr_avail = 0;
1181         if (caps & SDHCI_CAN_VDD_330)
1182                 mmc->ocr_avail |= MMC_VDD_32_33|MMC_VDD_33_34;
1183         else if (caps & SDHCI_CAN_VDD_300)
1184                 mmc->ocr_avail |= MMC_VDD_29_30|MMC_VDD_30_31;
1185         else if (caps & SDHCI_CAN_VDD_180)
1186                 mmc->ocr_avail |= MMC_VDD_17_18|MMC_VDD_18_19;
1187
1188         if (mmc->ocr_avail == 0) {
1189                 printk(KERN_ERR "%s: Hardware doesn't report any "
1190                         "support voltages.\n", host->slot_descr);
1191                 ret = -ENODEV;
1192                 goto unmap;
1193         }
1194
1195         spin_lock_init(&host->lock);
1196
1197         /*
1198          * Maximum number of segments. Hardware cannot do scatter lists.
1199          */
1200         if (host->flags & SDHCI_USE_DMA)
1201                 mmc->max_hw_segs = 1;
1202         else
1203                 mmc->max_hw_segs = 16;
1204         mmc->max_phys_segs = 16;
1205
1206         /*
1207          * Maximum number of sectors in one transfer. Limited by DMA boundary
1208          * size (512KiB), which means (512 KiB/512=) 1024 entries.
1209          */
1210         mmc->max_sectors = 1024;
1211
1212         /*
1213          * Maximum segment size. Could be one segment with the maximum number
1214          * of sectors.
1215          */
1216         mmc->max_seg_size = mmc->max_sectors * 512;
1217
1218         /*
1219          * Init tasklets.
1220          */
1221         tasklet_init(&host->card_tasklet,
1222                 sdhci_tasklet_card, (unsigned long)host);
1223         tasklet_init(&host->finish_tasklet,
1224                 sdhci_tasklet_finish, (unsigned long)host);
1225
1226         setup_timer(&host->timer, sdhci_timeout_timer, (long)host);
1227
1228         ret = request_irq(host->irq, sdhci_irq, SA_SHIRQ,
1229                 host->slot_descr, host);
1230         if (ret)
1231                 goto untasklet;
1232
1233         sdhci_init(host);
1234
1235 #ifdef CONFIG_MMC_DEBUG
1236         sdhci_dumpregs(host);
1237 #endif
1238
1239         host->chip = chip;
1240         chip->hosts[slot] = host;
1241
1242         mmc_add_host(mmc);
1243
1244         printk(KERN_INFO "%s: SDHCI at 0x%08lx irq %d %s\n", mmc_hostname(mmc),
1245                 host->addr, host->irq,
1246                 (host->flags & SDHCI_USE_DMA)?"DMA":"PIO");
1247
1248         return 0;
1249
1250 untasklet:
1251         tasklet_kill(&host->card_tasklet);
1252         tasklet_kill(&host->finish_tasklet);
1253 unmap:
1254         iounmap(host->ioaddr);
1255 release:
1256         pci_release_region(pdev, host->bar);
1257 free:
1258         mmc_free_host(mmc);
1259
1260         return ret;
1261 }
1262
1263 static void sdhci_remove_slot(struct pci_dev *pdev, int slot)
1264 {
1265         struct sdhci_chip *chip;
1266         struct mmc_host *mmc;
1267         struct sdhci_host *host;
1268
1269         chip = pci_get_drvdata(pdev);
1270         host = chip->hosts[slot];
1271         mmc = host->mmc;
1272
1273         chip->hosts[slot] = NULL;
1274
1275         mmc_remove_host(mmc);
1276
1277         sdhci_reset(host, SDHCI_RESET_ALL);
1278
1279         free_irq(host->irq, host);
1280
1281         del_timer_sync(&host->timer);
1282
1283         tasklet_kill(&host->card_tasklet);
1284         tasklet_kill(&host->finish_tasklet);
1285
1286         iounmap(host->ioaddr);
1287
1288         pci_release_region(pdev, host->bar);
1289
1290         mmc_free_host(mmc);
1291 }
1292
1293 static int __devinit sdhci_probe(struct pci_dev *pdev,
1294         const struct pci_device_id *ent)
1295 {
1296         int ret, i;
1297         u8 slots, rev;
1298         struct sdhci_chip *chip;
1299
1300         BUG_ON(pdev == NULL);
1301         BUG_ON(ent == NULL);
1302
1303         pci_read_config_byte(pdev, PCI_CLASS_REVISION, &rev);
1304
1305         printk(KERN_INFO DRIVER_NAME
1306                 ": SDHCI controller found at %s [%04x:%04x] (rev %x)\n",
1307                 pci_name(pdev), (int)pdev->vendor, (int)pdev->device,
1308                 (int)rev);
1309
1310         ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &slots);
1311         if (ret)
1312                 return ret;
1313
1314         slots = PCI_SLOT_INFO_SLOTS(slots) + 1;
1315         DBG("found %d slot(s)\n", slots);
1316         if (slots == 0)
1317                 return -ENODEV;
1318
1319         ret = pci_enable_device(pdev);
1320         if (ret)
1321                 return ret;
1322
1323         chip = kzalloc(sizeof(struct sdhci_chip) +
1324                 sizeof(struct sdhci_host*) * slots, GFP_KERNEL);
1325         if (!chip) {
1326                 ret = -ENOMEM;
1327                 goto err;
1328         }
1329
1330         chip->pdev = pdev;
1331
1332         chip->num_slots = slots;
1333         pci_set_drvdata(pdev, chip);
1334
1335         for (i = 0;i < slots;i++) {
1336                 ret = sdhci_probe_slot(pdev, i);
1337                 if (ret) {
1338                         for (i--;i >= 0;i--)
1339                                 sdhci_remove_slot(pdev, i);
1340                         goto free;
1341                 }
1342         }
1343
1344         return 0;
1345
1346 free:
1347         pci_set_drvdata(pdev, NULL);
1348         kfree(chip);
1349
1350 err:
1351         pci_disable_device(pdev);
1352         return ret;
1353 }
1354
1355 static void __devexit sdhci_remove(struct pci_dev *pdev)
1356 {
1357         int i;
1358         struct sdhci_chip *chip;
1359
1360         chip = pci_get_drvdata(pdev);
1361
1362         if (chip) {
1363                 for (i = 0;i < chip->num_slots;i++)
1364                         sdhci_remove_slot(pdev, i);
1365
1366                 pci_set_drvdata(pdev, NULL);
1367
1368                 kfree(chip);
1369         }
1370
1371         pci_disable_device(pdev);
1372 }
1373
1374 static struct pci_driver sdhci_driver = {
1375         .name =         DRIVER_NAME,
1376         .id_table =     pci_ids,
1377         .probe =        sdhci_probe,
1378         .remove =       __devexit_p(sdhci_remove),
1379         .suspend =      sdhci_suspend,
1380         .resume =       sdhci_resume,
1381 };
1382
1383 /*****************************************************************************\
1384  *                                                                           *
1385  * Driver init/exit                                                          *
1386  *                                                                           *
1387 \*****************************************************************************/
1388
1389 static int __init sdhci_drv_init(void)
1390 {
1391         printk(KERN_INFO DRIVER_NAME
1392                 ": Secure Digital Host Controller Interface driver, "
1393                 DRIVER_VERSION "\n");
1394         printk(KERN_INFO DRIVER_NAME ": Copyright(c) Pierre Ossman\n");
1395
1396         return pci_register_driver(&sdhci_driver);
1397 }
1398
1399 static void __exit sdhci_drv_exit(void)
1400 {
1401         DBG("Exiting\n");
1402
1403         pci_unregister_driver(&sdhci_driver);
1404 }
1405
1406 module_init(sdhci_drv_init);
1407 module_exit(sdhci_drv_exit);
1408
1409 MODULE_AUTHOR("Pierre Ossman <drzeus@drzeus.cx>");
1410 MODULE_DESCRIPTION("Secure Digital Host Controller Interface driver");
1411 MODULE_VERSION(DRIVER_VERSION);
1412 MODULE_LICENSE("GPL");