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         /* timeout in us */
 330         target_timeout = data->timeout_ns / 1000 +
 331                 data->timeout_clks / host->clock;
 332
 333         /*
 334          * Figure out needed cycles.
 335          * We do this in steps in order to fit inside a 32 bit int.
 336          * The first step is the minimum timeout, which will have a
 337          * minimum resolution of 6 bits:
 338          * (1) 2^13*1000 > 2^22,
 339          * (2) host->timeout_clk < 2^16
 340          *     =>
 341          *     (1) / (2) > 2^6
 342          */
 343         count = 0;
 344         current_timeout = (1 << 13) * 1000 / host->timeout_clk;
 345         while (current_timeout < target_timeout) {
 346                 count++;
 347                 current_timeout <<= 1;
 348                 if (count >= 0xF)
 349                         break;
 350         }
 351
 352         if (count >= 0xF) {
 353                 printk(KERN_WARNING "%s: Too large timeout requested!\n",
 354                         mmc_hostname(host->mmc));
 355                 count = 0xE;
 356         }
 357
 358         writeb(count, host->ioaddr + SDHCI_TIMEOUT_CONTROL);
 359
 360         if (host->flags & SDHCI_USE_DMA) {
 361                 int count;
 362
 363                 count = pci_map_sg(host->chip->pdev, data->sg, data->sg_len,
 364                         (data->flags & MMC_DATA_READ)?PCI_DMA_FROMDEVICE:PCI_DMA_TODEVICE);
 365                 BUG_ON(count != 1);
 366
 367                 writel(sg_dma_address(data->sg), host->ioaddr + SDHCI_DMA_ADDRESS);
 368         } else {
 369                 host->size = data->blksz * data->blocks;
 370
 371                 host->cur_sg = data->sg;
 372                 host->num_sg = data->sg_len;
 373
 374                 host->offset = 0;
 375                 host->remain = host->cur_sg->length;
 376         }
 377
 378         writew(data->blksz, host->ioaddr + SDHCI_BLOCK_SIZE);
 379         writew(data->blocks, host->ioaddr + SDHCI_BLOCK_COUNT);
 380 }
 381
 382 static void sdhci_set_transfer_mode(struct sdhci_host *host,
 383         struct mmc_data *data)
 384 {
 385         u16 mode;
 386
 387         WARN_ON(host->data);
 388
 389         if (data == NULL)
 390                 return;
 391
 392         mode = SDHCI_TRNS_BLK_CNT_EN;
 393         if (data->blocks > 1)
 394                 mode |= SDHCI_TRNS_MULTI;
 395         if (data->flags & MMC_DATA_READ)
 396                 mode |= SDHCI_TRNS_READ;
 397         if (host->flags & SDHCI_USE_DMA)
 398                 mode |= SDHCI_TRNS_DMA;
 399
 400         writew(mode, host->ioaddr + SDHCI_TRANSFER_MODE);
 401 }
 402
 403 static void sdhci_finish_data(struct sdhci_host *host)
 404 {
 405         struct mmc_data *data;
 406         u16 blocks;
 407
 408         BUG_ON(!host->data);
 409
 410         data = host->data;
 411         host->data = NULL;
 412
 413         if (host->flags & SDHCI_USE_DMA) {
 414                 pci_unmap_sg(host->chip->pdev, data->sg, data->sg_len,
 415                         (data->flags & MMC_DATA_READ)?PCI_DMA_FROMDEVICE:PCI_DMA_TODEVICE);
 416         }
 417
 418         /*
 419          * Controller doesn't count down when in single block mode.
 420          */
 421         if ((data->blocks == 1) && (data->error == MMC_ERR_NONE))
 422                 blocks = 0;
 423         else
 424                 blocks = readw(host->ioaddr + SDHCI_BLOCK_COUNT);
 425         data->bytes_xfered = data->blksz * (data->blocks - blocks);
 426
 427         if ((data->error == MMC_ERR_NONE) && blocks) {
 428                 printk(KERN_ERR "%s: Controller signalled completion even "
 429                         "though there were blocks left. Please report this "
 430                         "to " BUGMAIL ".\n", mmc_hostname(host->mmc));
 431                 data->error = MMC_ERR_FAILED;
 432         }
 433
 434         if (host->size != 0) {
 435                 printk(KERN_ERR "%s: %d bytes were left untransferred. "
 436                         "Please report this to " BUGMAIL ".\n",
 437                         mmc_hostname(host->mmc), host->size);
 438                 data->error = MMC_ERR_FAILED;
 439         }
 440
 441         DBG("Ending data transfer (%d bytes)\n", data->bytes_xfered);
 442
 443         if (data->stop) {
 444                 /*
 445                  * The controller needs a reset of internal state machines
 446                  * upon error conditions.
 447                  */
 448                 if (data->error != MMC_ERR_NONE) {
 449                         sdhci_reset(host, SDHCI_RESET_CMD);
 450                         sdhci_reset(host, SDHCI_RESET_DATA);
 451                 }
 452
 453                 sdhci_send_command(host, data->stop);
 454         } else
 455                 tasklet_schedule(&host->finish_tasklet);
 456 }
 457
 458 static void sdhci_send_command(struct sdhci_host *host, struct mmc_command *cmd)
 459 {
 460         int flags;
 461         unsigned long timeout;
 462
 463         WARN_ON(host->cmd);
 464
 465         DBG("Sending cmd (%x)\n", cmd->opcode);
 466
 467         /* Wait max 10 ms */
 468         timeout = 10;
 469         while (readl(host->ioaddr + SDHCI_PRESENT_STATE) &
 470                 (SDHCI_CMD_INHIBIT | SDHCI_DATA_INHIBIT)) {
 471                 if (timeout == 0) {
 472                         printk(KERN_ERR "%s: Controller never released "
 473                                 "inhibit bits. Please report this to "
 474                                 BUGMAIL ".\n", mmc_hostname(host->mmc));
 475                         sdhci_dumpregs(host);
 476                         cmd->error = MMC_ERR_FAILED;
 477                         tasklet_schedule(&host->finish_tasklet);
 478                         return;
 479                 }
 480                 timeout--;
 481                 mdelay(1);
 482         }
 483
 484         mod_timer(&host->timer, jiffies + 10 * HZ);
 485
 486         host->cmd = cmd;
 487
 488         sdhci_prepare_data(host, cmd->data);
 489
 490         writel(cmd->arg, host->ioaddr + SDHCI_ARGUMENT);
 491
 492         sdhci_set_transfer_mode(host, cmd->data);
 493
 494         if ((cmd->flags & MMC_RSP_136) && (cmd->flags & MMC_RSP_BUSY)) {
 495                 printk(KERN_ERR "%s: Unsupported response type! "
 496                         "Please report this to " BUGMAIL ".\n",
 497                         mmc_hostname(host->mmc));
 498                 cmd->error = MMC_ERR_INVALID;
 499                 tasklet_schedule(&host->finish_tasklet);
 500                 return;
 501         }
 502
 503         if (!(cmd->flags & MMC_RSP_PRESENT))
 504                 flags = SDHCI_CMD_RESP_NONE;
 505         else if (cmd->flags & MMC_RSP_136)
 506                 flags = SDHCI_CMD_RESP_LONG;
 507         else if (cmd->flags & MMC_RSP_BUSY)
 508                 flags = SDHCI_CMD_RESP_SHORT_BUSY;
 509         else
 510                 flags = SDHCI_CMD_RESP_SHORT;
 511
 512         if (cmd->flags & MMC_RSP_CRC)
 513                 flags |= SDHCI_CMD_CRC;
 514         if (cmd->flags & MMC_RSP_OPCODE)
 515                 flags |= SDHCI_CMD_INDEX;
 516         if (cmd->data)
 517                 flags |= SDHCI_CMD_DATA;
 518
 519         writel(SDHCI_MAKE_CMD(cmd->opcode, flags),
 520                 host->ioaddr + SDHCI_COMMAND);
 521 }
 522
 523 static void sdhci_finish_command(struct sdhci_host *host)
 524 {
 525         int i;
 526
 527         BUG_ON(host->cmd == NULL);
 528
 529         if (host->cmd->flags & MMC_RSP_PRESENT) {
 530                 if (host->cmd->flags & MMC_RSP_136) {
 531                         /* CRC is stripped so we need to do some shifting. */
 532                         for (i = 0;i < 4;i++) {
 533                                 host->cmd->resp[i] = readl(host->ioaddr +
 534                                         SDHCI_RESPONSE + (3-i)*4) << 8;
 535                                 if (i != 3)
 536                                         host->cmd->resp[i] |=
 537                                                 readb(host->ioaddr +
 538                                                 SDHCI_RESPONSE + (3-i)*4-1);
 539                         }
 540                 } else {
 541                         host->cmd->resp[0] = readl(host->ioaddr + SDHCI_RESPONSE);
 542                 }
 543         }
 544
 545         host->cmd->error = MMC_ERR_NONE;
 546
 547         DBG("Ending cmd (%x)\n", host->cmd->opcode);
 548
 549         if (host->cmd->data)
 550                 host->data = host->cmd->data;
 551         else
 552                 tasklet_schedule(&host->finish_tasklet);
 553
 554         host->cmd = NULL;
 555 }
 556
 557 static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
 558 {
 559         int div;
 560         u16 clk;
 561         unsigned long timeout;
 562
 563         if (clock == host->clock)
 564                 return;
 565
 566         writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL);
 567
 568         if (clock == 0)
 569                 goto out;
 570
 571         for (div = 1;div < 256;div *= 2) {
 572                 if ((host->max_clk / div) <= clock)
 573                         break;
 574         }
 575         div >>= 1;
 576
 577         clk = div << SDHCI_DIVIDER_SHIFT;
 578         clk |= SDHCI_CLOCK_INT_EN;
 579         writew(clk, host->ioaddr + SDHCI_CLOCK_CONTROL);
 580
 581         /* Wait max 10 ms */
 582         timeout = 10;
 583         while (!((clk = readw(host->ioaddr + SDHCI_CLOCK_CONTROL))
 584                 & SDHCI_CLOCK_INT_STABLE)) {
 585                 if (timeout == 0) {
 586                         printk(KERN_ERR "%s: Internal clock never stabilised. "
 587                                 "Please report this to " BUGMAIL ".\n",
 588                                 mmc_hostname(host->mmc));
 589                         sdhci_dumpregs(host);
 590                         return;
 591                 }
 592                 timeout--;
 593                 mdelay(1);
 594         }
 595
 596         clk |= SDHCI_CLOCK_CARD_EN;
 597         writew(clk, host->ioaddr + SDHCI_CLOCK_CONTROL);
 598
 599 out:
 600         host->clock = clock;
 601 }
 602
 603 static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
 604 {
 605         u8 pwr;
 606
 607         if (host->power == power)
 608                 return;
 609
 610         writeb(0, host->ioaddr + SDHCI_POWER_CONTROL);
 611
 612         if (power == (unsigned short)-1)
 613                 goto out;
 614
 615         pwr = SDHCI_POWER_ON;
 616
 617         switch (power) {
 618         case MMC_VDD_170:
 619         case MMC_VDD_180:
 620         case MMC_VDD_190:
 621                 pwr |= SDHCI_POWER_180;
 622                 break;
 623         case MMC_VDD_290:
 624         case MMC_VDD_300:
 625         case MMC_VDD_310:
 626                 pwr |= SDHCI_POWER_300;
 627                 break;
 628         case MMC_VDD_320:
 629         case MMC_VDD_330:
 630         case MMC_VDD_340:
 631                 pwr |= SDHCI_POWER_330;
 632                 break;
 633         default:
 634                 BUG();
 635         }
 636
 637         writeb(pwr, host->ioaddr + SDHCI_POWER_CONTROL);
 638
 639 out:
 640         host->power = power;
 641 }
 642
 643 /*****************************************************************************\
 644  *                                                                           *
 645  * MMC callbacks                                                             *
 646  *                                                                           *
 647 \*****************************************************************************/
 648
 649 static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
 650 {
 651         struct sdhci_host *host;
 652         unsigned long flags;
 653
 654         host = mmc_priv(mmc);
 655
 656         spin_lock_irqsave(&host->lock, flags);
 657
 658         WARN_ON(host->mrq != NULL);
 659
 660         sdhci_activate_led(host);
 661
 662         host->mrq = mrq;
 663
 664         if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
 665                 host->mrq->cmd->error = MMC_ERR_TIMEOUT;
 666                 tasklet_schedule(&host->finish_tasklet);
 667         } else
 668                 sdhci_send_command(host, mrq->cmd);
 669
 670         spin_unlock_irqrestore(&host->lock, flags);
 671 }
 672
 673 static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 674 {
 675         struct sdhci_host *host;
 676         unsigned long flags;
 677         u8 ctrl;
 678
 679         host = mmc_priv(mmc);
 680
 681         spin_lock_irqsave(&host->lock, flags);
 682
 683         /*
 684          * Reset the chip on each power off.
 685          * Should clear out any weird states.
 686          */
 687         if (ios->power_mode == MMC_POWER_OFF) {
 688                 writel(0, host->ioaddr + SDHCI_SIGNAL_ENABLE);
 689                 sdhci_init(host);
 690         }
 691
 692         sdhci_set_clock(host, ios->clock);
 693
 694         if (ios->power_mode == MMC_POWER_OFF)
 695                 sdhci_set_power(host, -1);
 696         else
 697                 sdhci_set_power(host, ios->vdd);
 698
 699         ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
 700         if (ios->bus_width == MMC_BUS_WIDTH_4)
 701                 ctrl |= SDHCI_CTRL_4BITBUS;
 702         else
 703                 ctrl &= ~SDHCI_CTRL_4BITBUS;
 704         writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
 705
 706         spin_unlock_irqrestore(&host->lock, flags);
 707 }
 708
 709 static int sdhci_get_ro(struct mmc_host *mmc)
 710 {
 711         struct sdhci_host *host;
 712         unsigned long flags;
 713         int present;
 714
 715         host = mmc_priv(mmc);
 716
 717         spin_lock_irqsave(&host->lock, flags);
 718
 719         present = readl(host->ioaddr + SDHCI_PRESENT_STATE);
 720
 721         spin_unlock_irqrestore(&host->lock, flags);
 722
 723         return !(present & SDHCI_WRITE_PROTECT);
 724 }
 725
 726 static struct mmc_host_ops sdhci_ops = {
 727         .request        = sdhci_request,
 728         .set_ios        = sdhci_set_ios,
 729         .get_ro         = sdhci_get_ro,
 730 };
 731
 732 /*****************************************************************************\
 733  *                                                                           *
 734  * Tasklets                                                                  *
 735  *                                                                           *
 736 \*****************************************************************************/
 737
 738 static void sdhci_tasklet_card(unsigned long param)
 739 {
 740         struct sdhci_host *host;
 741         unsigned long flags;
 742
 743         host = (struct sdhci_host*)param;
 744
 745         spin_lock_irqsave(&host->lock, flags);
 746
 747         if (!(readl(host->ioaddr + SDHCI_PRESENT_STATE) & SDHCI_CARD_PRESENT)) {
 748                 if (host->mrq) {
 749                         printk(KERN_ERR "%s: Card removed during transfer!\n",
 750                                 mmc_hostname(host->mmc));
 751                         printk(KERN_ERR "%s: Resetting controller.\n",
 752                                 mmc_hostname(host->mmc));
 753
 754                         sdhci_reset(host, SDHCI_RESET_CMD);
 755                         sdhci_reset(host, SDHCI_RESET_DATA);
 756
 757                         host->mrq->cmd->error = MMC_ERR_FAILED;
 758                         tasklet_schedule(&host->finish_tasklet);
 759                 }
 760         }
 761
 762         spin_unlock_irqrestore(&host->lock, flags);
 763
 764         mmc_detect_change(host->mmc, msecs_to_jiffies(500));
 765 }
 766
 767 static void sdhci_tasklet_finish(unsigned long param)
 768 {
 769         struct sdhci_host *host;
 770         unsigned long flags;
 771         struct mmc_request *mrq;
 772
 773         host = (struct sdhci_host*)param;
 774
 775         spin_lock_irqsave(&host->lock, flags);
 776
 777         del_timer(&host->timer);
 778
 779         mrq = host->mrq;
 780
 781         DBG("Ending request, cmd (%x)\n", mrq->cmd->opcode);
 782
 783         /*
 784          * The controller needs a reset of internal state machines
 785          * upon error conditions.
 786          */
 787         if ((mrq->cmd->error != MMC_ERR_NONE) ||
 788                 (mrq->data && ((mrq->data->error != MMC_ERR_NONE) ||
 789                 (mrq->data->stop && (mrq->data->stop->error != MMC_ERR_NONE))))) {
 790                 sdhci_reset(host, SDHCI_RESET_CMD);
 791                 sdhci_reset(host, SDHCI_RESET_DATA);
 792         }
 793
 794         host->mrq = NULL;
 795         host->cmd = NULL;
 796         host->data = NULL;
 797
 798         sdhci_deactivate_led(host);
 799
 800         spin_unlock_irqrestore(&host->lock, flags);
 801
 802         mmc_request_done(host->mmc, mrq);
 803 }
 804
 805 static void sdhci_timeout_timer(unsigned long data)
 806 {
 807         struct sdhci_host *host;
 808         unsigned long flags;
 809
 810         host = (struct sdhci_host*)data;
 811
 812         spin_lock_irqsave(&host->lock, flags);
 813
 814         if (host->mrq) {
 815                 printk(KERN_ERR "%s: Timeout waiting for hardware interrupt. "
 816                         "Please report this to " BUGMAIL ".\n",
 817                         mmc_hostname(host->mmc));
 818                 sdhci_dumpregs(host);
 819
 820                 if (host->data) {
 821                         host->data->error = MMC_ERR_TIMEOUT;
 822                         sdhci_finish_data(host);
 823                 } else {
 824                         if (host->cmd)
 825                                 host->cmd->error = MMC_ERR_TIMEOUT;
 826                         else
 827                                 host->mrq->cmd->error = MMC_ERR_TIMEOUT;
 828
 829                         tasklet_schedule(&host->finish_tasklet);
 830                 }
 831         }
 832
 833         spin_unlock_irqrestore(&host->lock, flags);
 834 }
 835
 836 /*****************************************************************************\
 837  *                                                                           *
 838  * Interrupt handling                                                        *
 839  *                                                                           *
 840 \*****************************************************************************/
 841
 842 static void sdhci_cmd_irq(struct sdhci_host *host, u32 intmask)
 843 {
 844         BUG_ON(intmask == 0);
 845
 846         if (!host->cmd) {
 847                 printk(KERN_ERR "%s: Got command interrupt even though no "
 848                         "command operation was in progress.\n",
 849                         mmc_hostname(host->mmc));
 850                 printk(KERN_ERR "%s: Please report this to " BUGMAIL ".\n",
 851                         mmc_hostname(host->mmc));
 852                 sdhci_dumpregs(host);
 853                 return;
 854         }
 855
 856         if (intmask & SDHCI_INT_RESPONSE)
 857                 sdhci_finish_command(host);
 858         else {
 859                 if (intmask & SDHCI_INT_TIMEOUT)
 860                         host->cmd->error = MMC_ERR_TIMEOUT;
 861                 else if (intmask & SDHCI_INT_CRC)
 862                         host->cmd->error = MMC_ERR_BADCRC;
 863                 else if (intmask & (SDHCI_INT_END_BIT | SDHCI_INT_INDEX))
 864                         host->cmd->error = MMC_ERR_FAILED;
 865                 else
 866                         host->cmd->error = MMC_ERR_INVALID;
 867
 868                 tasklet_schedule(&host->finish_tasklet);
 869         }
 870 }
 871
 872 static void sdhci_data_irq(struct sdhci_host *host, u32 intmask)
 873 {
 874         BUG_ON(intmask == 0);
 875
 876         if (!host->data) {
 877                 /*
 878                  * A data end interrupt is sent together with the response
 879                  * for the stop command.
 880                  */
 881                 if (intmask & SDHCI_INT_DATA_END)
 882                         return;
 883
 884                 printk(KERN_ERR "%s: Got data interrupt even though no "
 885                         "data operation was in progress.\n",
 886                         mmc_hostname(host->mmc));
 887                 printk(KERN_ERR "%s: Please report this to " BUGMAIL ".\n",
 888                         mmc_hostname(host->mmc));
 889                 sdhci_dumpregs(host);
 890
 891                 return;
 892         }
 893
 894         if (intmask & SDHCI_INT_DATA_TIMEOUT)
 895                 host->data->error = MMC_ERR_TIMEOUT;
 896         else if (intmask & SDHCI_INT_DATA_CRC)
 897                 host->data->error = MMC_ERR_BADCRC;
 898         else if (intmask & SDHCI_INT_DATA_END_BIT)
 899                 host->data->error = MMC_ERR_FAILED;
 900
 901         if (host->data->error != MMC_ERR_NONE)
 902                 sdhci_finish_data(host);
 903         else {
 904                 if (intmask & (SDHCI_INT_DATA_AVAIL | SDHCI_INT_SPACE_AVAIL))
 905                         sdhci_transfer_pio(host);
 906
 907                 if (intmask & SDHCI_INT_DATA_END)
 908                         sdhci_finish_data(host);
 909         }
 910 }
 911
 912 static irqreturn_t sdhci_irq(int irq, void *dev_id, struct pt_regs *regs)
 913 {
 914         irqreturn_t result;
 915         struct sdhci_host* host = dev_id;
 916         u32 intmask;
 917
 918         spin_lock(&host->lock);
 919
 920         intmask = readl(host->ioaddr + SDHCI_INT_STATUS);
 921
 922         if (!intmask) {
 923                 result = IRQ_NONE;
 924                 goto out;
 925         }
 926
 927         DBG("*** %s got interrupt: 0x%08x\n", host->slot_descr, intmask);
 928
 929         if (intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE)) {
 930                 writel(intmask & (SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE),
 931                         host->ioaddr + SDHCI_INT_STATUS);
 932                 tasklet_schedule(&host->card_tasklet);
 933         }
 934
 935         intmask &= ~(SDHCI_INT_CARD_INSERT | SDHCI_INT_CARD_REMOVE);
 936
 937         if (intmask & SDHCI_INT_CMD_MASK) {
 938                 writel(intmask & SDHCI_INT_CMD_MASK,
 939                         host->ioaddr + SDHCI_INT_STATUS);
 940                 sdhci_cmd_irq(host, intmask & SDHCI_INT_CMD_MASK);
 941         }
 942
 943         if (intmask & SDHCI_INT_DATA_MASK) {
 944                 writel(intmask & SDHCI_INT_DATA_MASK,
 945                         host->ioaddr + SDHCI_INT_STATUS);
 946                 sdhci_data_irq(host, intmask & SDHCI_INT_DATA_MASK);
 947         }
 948
 949         intmask &= ~(SDHCI_INT_CMD_MASK | SDHCI_INT_DATA_MASK);
 950
 951         if (intmask & SDHCI_INT_BUS_POWER) {
 952                 printk(KERN_ERR "%s: Card is consuming too much power!\n",
 953                         mmc_hostname(host->mmc));
 954                 writel(SDHCI_INT_BUS_POWER, host->ioaddr + SDHCI_INT_STATUS);
 955         }
 956
 957         intmask &= SDHCI_INT_BUS_POWER;
 958
 959         if (intmask) {
 960                 printk(KERN_ERR "%s: Unexpected interrupt 0x%08x. Please "
 961                         "report this to " BUGMAIL ".\n",
 962                         mmc_hostname(host->mmc), intmask);
 963                 sdhci_dumpregs(host);
 964
 965                 writel(intmask, host->ioaddr + SDHCI_INT_STATUS);
 966         }
 967
 968         result = IRQ_HANDLED;
 969
 970 out:
 971         spin_unlock(&host->lock);
 972
 973         return result;
 974 }
 975
 976 /*****************************************************************************\
 977  *                                                                           *
 978  * Suspend/resume                                                            *
 979  *                                                                           *
 980 \*****************************************************************************/
 981
 982 #ifdef CONFIG_PM
 983
 984 static int sdhci_suspend (struct pci_dev *pdev, pm_message_t state)
 985 {
 986         struct sdhci_chip *chip;
 987         int i, ret;
 988
 989         chip = pci_get_drvdata(pdev);
 990         if (!chip)
 991                 return 0;
 992
 993         DBG("Suspending...\n");
 994
 995         for (i = 0;i < chip->num_slots;i++) {
 996                 if (!chip->hosts[i])
 997                         continue;
 998                 ret = mmc_suspend_host(chip->hosts[i]->mmc, state);
 999                 if (ret) {
1000                         for (i--;i >= 0;i--)
1001                                 mmc_resume_host(chip->hosts[i]->mmc);
1002                         return ret;
1003                 }
1004         }
1005
1006         pci_save_state(pdev);
1007         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
1008         pci_disable_device(pdev);
1009         pci_set_power_state(pdev, pci_choose_state(pdev, state));
1010
1011         return 0;
1012 }
1013
1014 static int sdhci_resume (struct pci_dev *pdev)
1015 {
1016         struct sdhci_chip *chip;
1017         int i, ret;
1018
1019         chip = pci_get_drvdata(pdev);
1020         if (!chip)
1021                 return 0;
1022
1023         DBG("Resuming...\n");
1024
1025         pci_set_power_state(pdev, PCI_D0);
1026         pci_restore_state(pdev);
1027         pci_enable_device(pdev);
1028
1029         for (i = 0;i < chip->num_slots;i++) {
1030                 if (!chip->hosts[i])
1031                         continue;
1032                 if (chip->hosts[i]->flags & SDHCI_USE_DMA)
1033                         pci_set_master(pdev);
1034                 sdhci_init(chip->hosts[i]);
1035                 ret = mmc_resume_host(chip->hosts[i]->mmc);
1036                 if (ret)
1037                         return ret;
1038         }
1039
1040         return 0;
1041 }
1042
1043 #else /* CONFIG_PM */
1044
1045 #define sdhci_suspend NULL
1046 #define sdhci_resume NULL
1047
1048 #endif /* CONFIG_PM */
1049
1050 /*****************************************************************************\
1051  *                                                                           *
1052  * Device probing/removal                                                    *
1053  *                                                                           *
1054 \*****************************************************************************/
1055
1056 static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
1057 {
1058         int ret;
1059         struct sdhci_chip *chip;
1060         struct mmc_host *mmc;
1061         struct sdhci_host *host;
1062
1063         u8 first_bar;
1064         unsigned int caps;
1065
1066         chip = pci_get_drvdata(pdev);
1067         BUG_ON(!chip);
1068
1069         ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &first_bar);
1070         if (ret)
1071                 return ret;
1072
1073         first_bar &= PCI_SLOT_INFO_FIRST_BAR_MASK;
1074
1075         if (first_bar > 5) {
1076                 printk(KERN_ERR DRIVER_NAME ": Invalid first BAR. Aborting.\n");
1077                 return -ENODEV;
1078         }
1079
1080         if (!(pci_resource_flags(pdev, first_bar + slot) & IORESOURCE_MEM)) {
1081                 printk(KERN_ERR DRIVER_NAME ": BAR is not iomem. Aborting.\n");
1082                 return -ENODEV;
1083         }
1084
1085         if (pci_resource_len(pdev, first_bar + slot) != 0x100) {
1086                 printk(KERN_ERR DRIVER_NAME ": Invalid iomem size. Aborting.\n");
1087                 return -ENODEV;
1088         }
1089
1090         mmc = mmc_alloc_host(sizeof(struct sdhci_host), &pdev->dev);
1091         if (!mmc)
1092                 return -ENOMEM;
1093
1094         host = mmc_priv(mmc);
1095         host->mmc = mmc;
1096
1097         host->bar = first_bar + slot;
1098
1099         host->addr = pci_resource_start(pdev, host->bar);
1100         host->irq = pdev->irq;
1101
1102         DBG("slot %d at 0x%08lx, irq %d\n", slot, host->addr, host->irq);
1103
1104         snprintf(host->slot_descr, 20, "sdhci:slot%d", slot);
1105
1106         ret = pci_request_region(pdev, host->bar, host->slot_descr);
1107         if (ret)
1108                 goto free;
1109
1110         host->ioaddr = ioremap_nocache(host->addr,
1111                 pci_resource_len(pdev, host->bar));
1112         if (!host->ioaddr) {
1113                 ret = -ENOMEM;
1114                 goto release;
1115         }
1116
1117         caps = readl(host->ioaddr + SDHCI_CAPABILITIES);
1118
1119         if ((caps & SDHCI_CAN_DO_DMA) && ((pdev->class & 0x0000FF) == 0x01))
1120                 host->flags |= SDHCI_USE_DMA;
1121
1122         if (host->flags & SDHCI_USE_DMA) {
1123                 if (pci_set_dma_mask(pdev, DMA_32BIT_MASK)) {
1124                         printk(KERN_WARNING "%s: No suitable DMA available. "
1125                                 "Falling back to PIO.\n", host->slot_descr);
1126                         host->flags &= ~SDHCI_USE_DMA;
1127                 }
1128         }
1129
1130         if (host->flags & SDHCI_USE_DMA)
1131                 pci_set_master(pdev);
1132         else /* XXX: Hack to get MMC layer to avoid highmem */
1133                 pdev->dma_mask = 0;
1134
1135         host->max_clk =
1136                 (caps & SDHCI_CLOCK_BASE_MASK) >> SDHCI_CLOCK_BASE_SHIFT;
1137         if (host->max_clk == 0) {
1138                 printk(KERN_ERR "%s: Hardware doesn't specify base clock "
1139                         "frequency.\n", host->slot_descr);
1140                 ret = -ENODEV;
1141                 goto unmap;
1142         }
1143         host->max_clk *= 1000000;
1144
1145         host->timeout_clk =
1146                 (caps & SDHCI_TIMEOUT_CLK_MASK) >> SDHCI_TIMEOUT_CLK_SHIFT;
1147         if (host->timeout_clk == 0) {
1148                 printk(KERN_ERR "%s: Hardware doesn't specify timeout clock "
1149                         "frequency.\n", host->slot_descr);
1150                 ret = -ENODEV;
1151                 goto unmap;
1152         }
1153         if (caps & SDHCI_TIMEOUT_CLK_UNIT)
1154                 host->timeout_clk *= 1000;
1155
1156         /*
1157          * Set host parameters.
1158          */
1159         mmc->ops = &sdhci_ops;
1160         mmc->f_min = host->max_clk / 256;
1161         mmc->f_max = host->max_clk;
1162         mmc->caps = MMC_CAP_4_BIT_DATA;
1163
1164         mmc->ocr_avail = 0;
1165         if (caps & SDHCI_CAN_VDD_330)
1166                 mmc->ocr_avail |= MMC_VDD_32_33|MMC_VDD_33_34;
1167         else if (caps & SDHCI_CAN_VDD_300)
1168                 mmc->ocr_avail |= MMC_VDD_29_30|MMC_VDD_30_31;
1169         else if (caps & SDHCI_CAN_VDD_180)
1170                 mmc->ocr_avail |= MMC_VDD_17_18|MMC_VDD_18_19;
1171
1172         if (mmc->ocr_avail == 0) {
1173                 printk(KERN_ERR "%s: Hardware doesn't report any "
1174                         "support voltages.\n", host->slot_descr);
1175                 ret = -ENODEV;
1176                 goto unmap;
1177         }
1178
1179         spin_lock_init(&host->lock);
1180
1181         /*
1182          * Maximum number of segments. Hardware cannot do scatter lists.
1183          */
1184         if (host->flags & SDHCI_USE_DMA)
1185                 mmc->max_hw_segs = 1;
1186         else
1187                 mmc->max_hw_segs = 16;
1188         mmc->max_phys_segs = 16;
1189
1190         /*
1191          * Maximum number of sectors in one transfer. Limited by sector
1192          * count register.
1193          */
1194         mmc->max_sectors = 0x3FFF;
1195
1196         /*
1197          * Maximum segment size. Could be one segment with the maximum number
1198          * of sectors.
1199          */
1200         mmc->max_seg_size = mmc->max_sectors * 512;
1201
1202         /*
1203          * Init tasklets.
1204          */
1205         tasklet_init(&host->card_tasklet,
1206                 sdhci_tasklet_card, (unsigned long)host);
1207         tasklet_init(&host->finish_tasklet,
1208                 sdhci_tasklet_finish, (unsigned long)host);
1209
1210         setup_timer(&host->timer, sdhci_timeout_timer, (long)host);
1211
1212         ret = request_irq(host->irq, sdhci_irq, SA_SHIRQ,
1213                 host->slot_descr, host);
1214         if (ret)
1215                 goto untasklet;
1216
1217         sdhci_init(host);
1218
1219 #ifdef CONFIG_MMC_DEBUG
1220         sdhci_dumpregs(host);
1221 #endif
1222
1223         host->chip = chip;
1224         chip->hosts[slot] = host;
1225
1226         mmc_add_host(mmc);
1227
1228         printk(KERN_INFO "%s: SDHCI at 0x%08lx irq %d %s\n", mmc_hostname(mmc),
1229                 host->addr, host->irq,
1230                 (host->flags & SDHCI_USE_DMA)?"DMA":"PIO");
1231
1232         return 0;
1233
1234 untasklet:
1235         tasklet_kill(&host->card_tasklet);
1236         tasklet_kill(&host->finish_tasklet);
1237 unmap:
1238         iounmap(host->ioaddr);
1239 release:
1240         pci_release_region(pdev, host->bar);
1241 free:
1242         mmc_free_host(mmc);
1243
1244         return ret;
1245 }
1246
1247 static void sdhci_remove_slot(struct pci_dev *pdev, int slot)
1248 {
1249         struct sdhci_chip *chip;
1250         struct mmc_host *mmc;
1251         struct sdhci_host *host;
1252
1253         chip = pci_get_drvdata(pdev);
1254         host = chip->hosts[slot];
1255         mmc = host->mmc;
1256
1257         chip->hosts[slot] = NULL;
1258
1259         mmc_remove_host(mmc);
1260
1261         sdhci_reset(host, SDHCI_RESET_ALL);
1262
1263         free_irq(host->irq, host);
1264
1265         del_timer_sync(&host->timer);
1266
1267         tasklet_kill(&host->card_tasklet);
1268         tasklet_kill(&host->finish_tasklet);
1269
1270         iounmap(host->ioaddr);
1271
1272         pci_release_region(pdev, host->bar);
1273
1274         mmc_free_host(mmc);
1275 }
1276
1277 static int __devinit sdhci_probe(struct pci_dev *pdev,
1278         const struct pci_device_id *ent)
1279 {
1280         int ret, i;
1281         u8 slots, rev;
1282         struct sdhci_chip *chip;
1283
1284         BUG_ON(pdev == NULL);
1285         BUG_ON(ent == NULL);
1286
1287         pci_read_config_byte(pdev, PCI_CLASS_REVISION, &rev);
1288
1289         printk(KERN_INFO DRIVER_NAME
1290                 ": SDHCI controller found at %s [%04x:%04x] (rev %x)\n",
1291                 pci_name(pdev), (int)pdev->vendor, (int)pdev->device,
1292                 (int)rev);
1293
1294         ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &slots);
1295         if (ret)
1296                 return ret;
1297
1298         slots = PCI_SLOT_INFO_SLOTS(slots) + 1;
1299         DBG("found %d slot(s)\n", slots);
1300         if (slots == 0)
1301                 return -ENODEV;
1302
1303         ret = pci_enable_device(pdev);
1304         if (ret)
1305                 return ret;
1306
1307         chip = kzalloc(sizeof(struct sdhci_chip) +
1308                 sizeof(struct sdhci_host*) * slots, GFP_KERNEL);
1309         if (!chip) {
1310                 ret = -ENOMEM;
1311                 goto err;
1312         }
1313
1314         chip->pdev = pdev;
1315
1316         chip->num_slots = slots;
1317         pci_set_drvdata(pdev, chip);
1318
1319         for (i = 0;i < slots;i++) {
1320                 ret = sdhci_probe_slot(pdev, i);
1321                 if (ret) {
1322                         for (i--;i >= 0;i--)
1323                                 sdhci_remove_slot(pdev, i);
1324                         goto free;
1325                 }
1326         }
1327
1328         return 0;
1329
1330 free:
1331         pci_set_drvdata(pdev, NULL);
1332         kfree(chip);
1333
1334 err:
1335         pci_disable_device(pdev);
1336         return ret;
1337 }
1338
1339 static void __devexit sdhci_remove(struct pci_dev *pdev)
1340 {
1341         int i;
1342         struct sdhci_chip *chip;
1343
1344         chip = pci_get_drvdata(pdev);
1345
1346         if (chip) {
1347                 for (i = 0;i < chip->num_slots;i++)
1348                         sdhci_remove_slot(pdev, i);
1349
1350                 pci_set_drvdata(pdev, NULL);
1351
1352                 kfree(chip);
1353         }
1354
1355         pci_disable_device(pdev);
1356 }
1357
1358 static struct pci_driver sdhci_driver = {
1359         .name =         DRIVER_NAME,
1360         .id_table =     pci_ids,
1361         .probe =        sdhci_probe,
1362         .remove =       __devexit_p(sdhci_remove),
1363         .suspend =      sdhci_suspend,
1364         .resume =       sdhci_resume,
1365 };
1366
1367 /*****************************************************************************\
1368  *                                                                           *
1369  * Driver init/exit                                                          *
1370  *                                                                           *
1371 \*****************************************************************************/
1372
1373 static int __init sdhci_drv_init(void)
1374 {
1375         printk(KERN_INFO DRIVER_NAME
1376                 ": Secure Digital Host Controller Interface driver, "
1377                 DRIVER_VERSION "\n");
1378         printk(KERN_INFO DRIVER_NAME ": Copyright(c) Pierre Ossman\n");
1379
1380         return pci_register_driver(&sdhci_driver);
1381 }
1382
1383 static void __exit sdhci_drv_exit(void)
1384 {
1385         DBG("Exiting\n");
1386
1387         pci_unregister_driver(&sdhci_driver);
1388 }
1389
1390 module_init(sdhci_drv_init);
1391 module_exit(sdhci_drv_exit);
1392
1393 MODULE_AUTHOR("Pierre Ossman <drzeus@drzeus.cx>");
1394 MODULE_DESCRIPTION("Secure Digital Host Controller Interface driver");
1395 MODULE_VERSION(DRIVER_VERSION);
1396 MODULE_LICENSE("GPL");