drivers/mmc/host/sdhci-pci.c

   1 /*  linux/drivers/mmc/host/sdhci-pci.c - SDHCI on PCI bus interface
   2  *
   3  *  Copyright (C) 2005-2008 Pierre Ossman, All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or (at
   8  * your option) any later version.
   9  *
  10  * Thanks to the following companies for their support:
  11  *
  12  *     - JMicron (hardware and technical support)
  13  */
  14
  15 #include <linux/delay.h>
  16 #include <linux/highmem.h>
  17 #include <linux/pci.h>
  18 #include <linux/dma-mapping.h>
  19
  20 #include <linux/mmc/host.h>
  21
  22 #include <asm/scatterlist.h>
  23 #include <asm/io.h>
  24
  25 #include "sdhci.h"
  26
  27 /*
  28  * PCI registers
  29  */
  30
  31 #define PCI_SDHCI_IFPIO                 0x00
  32 #define PCI_SDHCI_IFDMA                 0x01
  33 #define PCI_SDHCI_IFVENDOR              0x02
  34
  35 #define PCI_SLOT_INFO                   0x40    /* 8 bits */
  36 #define  PCI_SLOT_INFO_SLOTS(x)         ((x >> 4) & 7)
  37 #define  PCI_SLOT_INFO_FIRST_BAR_MASK   0x07
  38
  39 #define MAX_SLOTS                       8
  40
  41 struct sdhci_pci_chip;
  42 struct sdhci_pci_slot;
  43
  44 struct sdhci_pci_fixes {
  45         unsigned int            quirks;
  46
  47         int                     (*probe)(struct sdhci_pci_chip*);
  48
  49         int                     (*probe_slot)(struct sdhci_pci_slot*);
  50         void                    (*remove_slot)(struct sdhci_pci_slot*, int);
  51
  52         int                     (*suspend)(struct sdhci_pci_chip*,
  53                                         pm_message_t);
  54         int                     (*resume)(struct sdhci_pci_chip*);
  55 };
  56
  57 struct sdhci_pci_slot {
  58         struct sdhci_pci_chip   *chip;
  59         struct sdhci_host       *host;
  60
  61         int                     pci_bar;
  62 };
  63
  64 struct sdhci_pci_chip {
  65         struct pci_dev          *pdev;
  66
  67         unsigned int            quirks;
  68         const struct sdhci_pci_fixes *fixes;
  69
  70         int                     num_slots;      /* Slots on controller */
  71         struct sdhci_pci_slot   *slots[MAX_SLOTS]; /* Pointers to host slots */
  72 };
  73
  74
  75 /*****************************************************************************\
  76  *                                                                           *
  77  * Hardware specific quirk handling                                          *
  78  *                                                                           *
  79 \*****************************************************************************/
  80
  81 static int ricoh_probe(struct sdhci_pci_chip *chip)
  82 {
  83         if (chip->pdev->subsystem_vendor == PCI_VENDOR_ID_IBM)
  84                 chip->quirks |= SDHCI_QUIRK_CLOCK_BEFORE_RESET;
  85
  86         if (chip->pdev->subsystem_vendor == PCI_VENDOR_ID_SAMSUNG ||
  87             chip->pdev->subsystem_vendor == PCI_VENDOR_ID_SONY)
  88                 chip->quirks |= SDHCI_QUIRK_NO_CARD_NO_RESET;
  89
  90         return 0;
  91 }
  92
  93 static const struct sdhci_pci_fixes sdhci_ricoh = {
  94         .probe          = ricoh_probe,
  95         .quirks         = SDHCI_QUIRK_32BIT_DMA_ADDR,
  96 };
  97
  98 static const struct sdhci_pci_fixes sdhci_ene_712 = {
  99         .quirks         = SDHCI_QUIRK_SINGLE_POWER_WRITE |
 100                           SDHCI_QUIRK_BROKEN_DMA,
 101 };
 102
 103 static const struct sdhci_pci_fixes sdhci_ene_714 = {
 104         .quirks         = SDHCI_QUIRK_SINGLE_POWER_WRITE |
 105                           SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS |
 106                           SDHCI_QUIRK_BROKEN_DMA,
 107 };
 108
 109 static const struct sdhci_pci_fixes sdhci_cafe = {
 110         .quirks         = SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER |
 111                           SDHCI_QUIRK_NO_BUSY_IRQ |
 112                           SDHCI_QUIRK_BROKEN_TIMEOUT_VAL,
 113 };
 114
 115 static int jmicron_pmos(struct sdhci_pci_chip *chip, int on)
 116 {
 117         u8 scratch;
 118         int ret;
 119
 120         ret = pci_read_config_byte(chip->pdev, 0xAE, &scratch);
 121         if (ret)
 122                 return ret;
 123
 124         /*
 125          * Turn PMOS on [bit 0], set over current detection to 2.4 V
 126          * [bit 1:2] and enable over current debouncing [bit 6].
 127          */
 128         if (on)
 129                 scratch |= 0x47;
 130         else
 131                 scratch &= ~0x47;
 132
 133         ret = pci_write_config_byte(chip->pdev, 0xAE, scratch);
 134         if (ret)
 135                 return ret;
 136
 137         return 0;
 138 }
 139
 140 static int jmicron_probe(struct sdhci_pci_chip *chip)
 141 {
 142         int ret;
 143
 144         if (chip->pdev->revision == 0) {
 145                 chip->quirks |= SDHCI_QUIRK_32BIT_DMA_ADDR |
 146                           SDHCI_QUIRK_32BIT_DMA_SIZE |
 147                           SDHCI_QUIRK_32BIT_ADMA_SIZE |
 148                           SDHCI_QUIRK_RESET_AFTER_REQUEST |
 149                           SDHCI_QUIRK_BROKEN_SMALL_PIO;
 150         }
 151
 152         /*
 153          * JMicron chips can have two interfaces to the same hardware
 154          * in order to work around limitations in Microsoft's driver.
 155          * We need to make sure we only bind to one of them.
 156          *
 157          * This code assumes two things:
 158          *
 159          * 1. The PCI code adds subfunctions in order.
 160          *
 161          * 2. The MMC interface has a lower subfunction number
 162          *    than the SD interface.
 163          */
 164         if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_SD) {
 165                 struct pci_dev *sd_dev;
 166
 167                 sd_dev = NULL;
 168                 while ((sd_dev = pci_get_device(PCI_VENDOR_ID_JMICRON,
 169                         PCI_DEVICE_ID_JMICRON_JMB38X_MMC, sd_dev)) != NULL) {
 170                         if ((PCI_SLOT(chip->pdev->devfn) ==
 171                                 PCI_SLOT(sd_dev->devfn)) &&
 172                                 (chip->pdev->bus == sd_dev->bus))
 173                                 break;
 174                 }
 175
 176                 if (sd_dev) {
 177                         pci_dev_put(sd_dev);
 178                         dev_info(&chip->pdev->dev, "Refusing to bind to "
 179                                 "secondary interface.\n");
 180                         return -ENODEV;
 181                 }
 182         }
 183
 184         /*
 185          * JMicron chips need a bit of a nudge to enable the power
 186          * output pins.
 187          */
 188         ret = jmicron_pmos(chip, 1);
 189         if (ret) {
 190                 dev_err(&chip->pdev->dev, "Failure enabling card power\n");
 191                 return ret;
 192         }
 193
 194         return 0;
 195 }
 196
 197 static void jmicron_enable_mmc(struct sdhci_host *host, int on)
 198 {
 199         u8 scratch;
 200
 201         scratch = readb(host->ioaddr + 0xC0);
 202
 203         if (on)
 204                 scratch |= 0x01;
 205         else
 206                 scratch &= ~0x01;
 207
 208         writeb(scratch, host->ioaddr + 0xC0);
 209 }
 210
 211 static int jmicron_probe_slot(struct sdhci_pci_slot *slot)
 212 {
 213         if (slot->chip->pdev->revision == 0) {
 214                 u16 version;
 215
 216                 version = readl(slot->host->ioaddr + SDHCI_HOST_VERSION);
 217                 version = (version & SDHCI_VENDOR_VER_MASK) >>
 218                         SDHCI_VENDOR_VER_SHIFT;
 219
 220                 /*
 221                  * Older versions of the chip have lots of nasty glitches
 222                  * in the ADMA engine. It's best just to avoid it
 223                  * completely.
 224                  */
 225                 if (version < 0xAC)
 226                         slot->host->quirks |= SDHCI_QUIRK_BROKEN_ADMA;
 227         }
 228
 229         /*
 230          * The secondary interface requires a bit set to get the
 231          * interrupts.
 232          */
 233         if (slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC)
 234                 jmicron_enable_mmc(slot->host, 1);
 235
 236         return 0;
 237 }
 238
 239 static void jmicron_remove_slot(struct sdhci_pci_slot *slot, int dead)
 240 {
 241         if (dead)
 242                 return;
 243
 244         if (slot->chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC)
 245                 jmicron_enable_mmc(slot->host, 0);
 246 }
 247
 248 static int jmicron_suspend(struct sdhci_pci_chip *chip, pm_message_t state)
 249 {
 250         int i;
 251
 252         if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC) {
 253                 for (i = 0;i < chip->num_slots;i++)
 254                         jmicron_enable_mmc(chip->slots[i]->host, 0);
 255         }
 256
 257         return 0;
 258 }
 259
 260 static int jmicron_resume(struct sdhci_pci_chip *chip)
 261 {
 262         int ret, i;
 263
 264         if (chip->pdev->device == PCI_DEVICE_ID_JMICRON_JMB38X_MMC) {
 265                 for (i = 0;i < chip->num_slots;i++)
 266                         jmicron_enable_mmc(chip->slots[i]->host, 1);
 267         }
 268
 269         ret = jmicron_pmos(chip, 1);
 270         if (ret) {
 271                 dev_err(&chip->pdev->dev, "Failure enabling card power\n");
 272                 return ret;
 273         }
 274
 275         return 0;
 276 }
 277
 278 static const struct sdhci_pci_fixes sdhci_jmicron = {
 279         .probe          = jmicron_probe,
 280
 281         .probe_slot     = jmicron_probe_slot,
 282         .remove_slot    = jmicron_remove_slot,
 283
 284         .suspend        = jmicron_suspend,
 285         .resume         = jmicron_resume,
 286 };
 287
 288 /* SysKonnect CardBus2SDIO extra registers */
 289 #define SYSKT_CTRL              0x200
 290 #define SYSKT_RDFIFO_STAT       0x204
 291 #define SYSKT_WRFIFO_STAT       0x208
 292 #define SYSKT_POWER_DATA        0x20c
 293 #define   SYSKT_POWER_330       0xef
 294 #define   SYSKT_POWER_300       0xf8
 295 #define   SYSKT_POWER_184       0xcc
 296 #define SYSKT_POWER_CMD         0x20d
 297 #define   SYSKT_POWER_START     (1 << 7)
 298 #define SYSKT_POWER_STATUS      0x20e
 299 #define   SYSKT_POWER_STATUS_OK (1 << 0)
 300 #define SYSKT_BOARD_REV         0x210
 301 #define SYSKT_CHIP_REV          0x211
 302 #define SYSKT_CONF_DATA         0x212
 303 #define   SYSKT_CONF_DATA_1V8   (1 << 2)
 304 #define   SYSKT_CONF_DATA_2V5   (1 << 1)
 305 #define   SYSKT_CONF_DATA_3V3   (1 << 0)
 306
 307 static int syskt_probe(struct sdhci_pci_chip *chip)
 308 {
 309         if ((chip->pdev->class & 0x0000FF) == PCI_SDHCI_IFVENDOR) {
 310                 chip->pdev->class &= ~0x0000FF;
 311                 chip->pdev->class |= PCI_SDHCI_IFDMA;
 312         }
 313         return 0;
 314 }
 315
 316 static int syskt_probe_slot(struct sdhci_pci_slot *slot)
 317 {
 318         int tm, ps;
 319
 320         u8 board_rev = readb(slot->host->ioaddr + SYSKT_BOARD_REV);
 321         u8  chip_rev = readb(slot->host->ioaddr + SYSKT_CHIP_REV);
 322         dev_info(&slot->chip->pdev->dev, "SysKonnect CardBus2SDIO, "
 323                                          "board rev %d.%d, chip rev %d.%d\n",
 324                                          board_rev >> 4, board_rev & 0xf,
 325                                          chip_rev >> 4,  chip_rev & 0xf);
 326         if (chip_rev >= 0x20)
 327                 slot->host->quirks |= SDHCI_QUIRK_FORCE_DMA;
 328
 329         writeb(SYSKT_POWER_330, slot->host->ioaddr + SYSKT_POWER_DATA);
 330         writeb(SYSKT_POWER_START, slot->host->ioaddr + SYSKT_POWER_CMD);
 331         udelay(50);
 332         tm = 10;  /* Wait max 1 ms */
 333         do {
 334                 ps = readw(slot->host->ioaddr + SYSKT_POWER_STATUS);
 335                 if (ps & SYSKT_POWER_STATUS_OK)
 336                         break;
 337                 udelay(100);
 338         } while (--tm);
 339         if (!tm) {
 340                 dev_err(&slot->chip->pdev->dev,
 341                         "power regulator never stabilized");
 342                 writeb(0, slot->host->ioaddr + SYSKT_POWER_CMD);
 343                 return -ENODEV;
 344         }
 345
 346         return 0;
 347 }
 348
 349 static const struct sdhci_pci_fixes sdhci_syskt = {
 350         .quirks         = SDHCI_QUIRK_NO_SIMULT_VDD_AND_POWER,
 351         .probe          = syskt_probe,
 352         .probe_slot     = syskt_probe_slot,
 353 };
 354
 355 static int via_probe(struct sdhci_pci_chip *chip)
 356 {
 357         if (chip->pdev->revision == 0x10)
 358                 chip->quirks |= SDHCI_QUIRK_DELAY_AFTER_POWER;
 359
 360         return 0;
 361 }
 362
 363 static const struct sdhci_pci_fixes sdhci_via = {
 364         .probe          = via_probe,
 365 };
 366
 367 static const struct pci_device_id pci_ids[] __devinitdata = {
 368         {
 369                 .vendor         = PCI_VENDOR_ID_RICOH,
 370                 .device         = PCI_DEVICE_ID_RICOH_R5C822,
 371                 .subvendor      = PCI_ANY_ID,
 372                 .subdevice      = PCI_ANY_ID,
 373                 .driver_data    = (kernel_ulong_t)&sdhci_ricoh,
 374         },
 375
 376         {
 377                 .vendor         = PCI_VENDOR_ID_ENE,
 378                 .device         = PCI_DEVICE_ID_ENE_CB712_SD,
 379                 .subvendor      = PCI_ANY_ID,
 380                 .subdevice      = PCI_ANY_ID,
 381                 .driver_data    = (kernel_ulong_t)&sdhci_ene_712,
 382         },
 383
 384         {
 385                 .vendor         = PCI_VENDOR_ID_ENE,
 386                 .device         = PCI_DEVICE_ID_ENE_CB712_SD_2,
 387                 .subvendor      = PCI_ANY_ID,
 388                 .subdevice      = PCI_ANY_ID,
 389                 .driver_data    = (kernel_ulong_t)&sdhci_ene_712,
 390         },
 391
 392         {
 393                 .vendor         = PCI_VENDOR_ID_ENE,
 394                 .device         = PCI_DEVICE_ID_ENE_CB714_SD,
 395                 .subvendor      = PCI_ANY_ID,
 396                 .subdevice      = PCI_ANY_ID,
 397                 .driver_data    = (kernel_ulong_t)&sdhci_ene_714,
 398         },
 399
 400         {
 401                 .vendor         = PCI_VENDOR_ID_ENE,
 402                 .device         = PCI_DEVICE_ID_ENE_CB714_SD_2,
 403                 .subvendor      = PCI_ANY_ID,
 404                 .subdevice      = PCI_ANY_ID,
 405                 .driver_data    = (kernel_ulong_t)&sdhci_ene_714,
 406         },
 407
 408         {
 409                 .vendor         = PCI_VENDOR_ID_MARVELL,
 410                 .device         = PCI_DEVICE_ID_MARVELL_88ALP01_SD,
 411                 .subvendor      = PCI_ANY_ID,
 412                 .subdevice      = PCI_ANY_ID,
 413                 .driver_data    = (kernel_ulong_t)&sdhci_cafe,
 414         },
 415
 416         {
 417                 .vendor         = PCI_VENDOR_ID_JMICRON,
 418                 .device         = PCI_DEVICE_ID_JMICRON_JMB38X_SD,
 419                 .subvendor      = PCI_ANY_ID,
 420                 .subdevice      = PCI_ANY_ID,
 421                 .driver_data    = (kernel_ulong_t)&sdhci_jmicron,
 422         },
 423
 424         {
 425                 .vendor         = PCI_VENDOR_ID_JMICRON,
 426                 .device         = PCI_DEVICE_ID_JMICRON_JMB38X_MMC,
 427                 .subvendor      = PCI_ANY_ID,
 428                 .subdevice      = PCI_ANY_ID,
 429                 .driver_data    = (kernel_ulong_t)&sdhci_jmicron,
 430         },
 431
 432         {
 433                 .vendor         = PCI_VENDOR_ID_SYSKONNECT,
 434                 .device         = 0x8000,
 435                 .subvendor      = PCI_ANY_ID,
 436                 .subdevice      = PCI_ANY_ID,
 437                 .driver_data    = (kernel_ulong_t)&sdhci_syskt,
 438         },
 439
 440         {
 441                 .vendor         = PCI_VENDOR_ID_VIA,
 442                 .device         = 0x95d0,
 443                 .subvendor      = PCI_ANY_ID,
 444                 .subdevice      = PCI_ANY_ID,
 445                 .driver_data    = (kernel_ulong_t)&sdhci_via,
 446         },
 447
 448         {       /* Generic SD host controller */
 449                 PCI_DEVICE_CLASS((PCI_CLASS_SYSTEM_SDHCI << 8), 0xFFFF00)
 450         },
 451
 452         { /* end: all zeroes */ },
 453 };
 454
 455 MODULE_DEVICE_TABLE(pci, pci_ids);
 456
 457 /*****************************************************************************\
 458  *                                                                           *
 459  * SDHCI core callbacks                                                      *
 460  *                                                                           *
 461 \*****************************************************************************/
 462
 463 static int sdhci_pci_enable_dma(struct sdhci_host *host)
 464 {
 465         struct sdhci_pci_slot *slot;
 466         struct pci_dev *pdev;
 467         int ret;
 468
 469         slot = sdhci_priv(host);
 470         pdev = slot->chip->pdev;
 471
 472         if (((pdev->class & 0xFFFF00) == (PCI_CLASS_SYSTEM_SDHCI << 8)) &&
 473                 ((pdev->class & 0x0000FF) != PCI_SDHCI_IFDMA) &&
 474                 (host->flags & SDHCI_USE_SDMA)) {
 475                 dev_warn(&pdev->dev, "Will use DMA mode even though HW "
 476                         "doesn't fully claim to support it.\n");
 477         }
 478
 479         ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
 480         if (ret)
 481                 return ret;
 482
 483         pci_set_master(pdev);
 484
 485         return 0;
 486 }
 487
 488 static struct sdhci_ops sdhci_pci_ops = {
 489         .enable_dma     = sdhci_pci_enable_dma,
 490 };
 491
 492 /*****************************************************************************\
 493  *                                                                           *
 494  * Suspend/resume                                                            *
 495  *                                                                           *
 496 \*****************************************************************************/
 497
 498 #ifdef CONFIG_PM
 499
 500 static int sdhci_pci_suspend (struct pci_dev *pdev, pm_message_t state)
 501 {
 502         struct sdhci_pci_chip *chip;
 503         struct sdhci_pci_slot *slot;
 504         int i, ret;
 505
 506         chip = pci_get_drvdata(pdev);
 507         if (!chip)
 508                 return 0;
 509
 510         for (i = 0;i < chip->num_slots;i++) {
 511                 slot = chip->slots[i];
 512                 if (!slot)
 513                         continue;
 514
 515                 ret = sdhci_suspend_host(slot->host, state);
 516
 517                 if (ret) {
 518                         for (i--;i >= 0;i--)
 519                                 sdhci_resume_host(chip->slots[i]->host);
 520                         return ret;
 521                 }
 522         }
 523
 524         if (chip->fixes && chip->fixes->suspend) {
 525                 ret = chip->fixes->suspend(chip, state);
 526                 if (ret) {
 527                         for (i = chip->num_slots - 1;i >= 0;i--)
 528                                 sdhci_resume_host(chip->slots[i]->host);
 529                         return ret;
 530                 }
 531         }
 532
 533         pci_save_state(pdev);
 534         pci_enable_wake(pdev, pci_choose_state(pdev, state), 0);
 535         pci_disable_device(pdev);
 536         pci_set_power_state(pdev, pci_choose_state(pdev, state));
 537
 538         return 0;
 539 }
 540
 541 static int sdhci_pci_resume (struct pci_dev *pdev)
 542 {
 543         struct sdhci_pci_chip *chip;
 544         struct sdhci_pci_slot *slot;
 545         int i, ret;
 546
 547         chip = pci_get_drvdata(pdev);
 548         if (!chip)
 549                 return 0;
 550
 551         pci_set_power_state(pdev, PCI_D0);
 552         pci_restore_state(pdev);
 553         ret = pci_enable_device(pdev);
 554         if (ret)
 555                 return ret;
 556
 557         if (chip->fixes && chip->fixes->resume) {
 558                 ret = chip->fixes->resume(chip);
 559                 if (ret)
 560                         return ret;
 561         }
 562
 563         for (i = 0;i < chip->num_slots;i++) {
 564                 slot = chip->slots[i];
 565                 if (!slot)
 566                         continue;
 567
 568                 ret = sdhci_resume_host(slot->host);
 569                 if (ret)
 570                         return ret;
 571         }
 572
 573         return 0;
 574 }
 575
 576 #else /* CONFIG_PM */
 577
 578 #define sdhci_pci_suspend NULL
 579 #define sdhci_pci_resume NULL
 580
 581 #endif /* CONFIG_PM */
 582
 583 /*****************************************************************************\
 584  *                                                                           *
 585  * Device probing/removal                                                    *
 586  *                                                                           *
 587 \*****************************************************************************/
 588
 589 static struct sdhci_pci_slot * __devinit sdhci_pci_probe_slot(
 590         struct pci_dev *pdev, struct sdhci_pci_chip *chip, int bar)
 591 {
 592         struct sdhci_pci_slot *slot;
 593         struct sdhci_host *host;
 594
 595         resource_size_t addr;
 596
 597         int ret;
 598
 599         if (!(pci_resource_flags(pdev, bar) & IORESOURCE_MEM)) {
 600                 dev_err(&pdev->dev, "BAR %d is not iomem. Aborting.\n", bar);
 601                 return ERR_PTR(-ENODEV);
 602         }
 603
 604         if (pci_resource_len(pdev, bar) != 0x100) {
 605                 dev_err(&pdev->dev, "Invalid iomem size. You may "
 606                         "experience problems.\n");
 607         }
 608
 609         if ((pdev->class & 0x0000FF) == PCI_SDHCI_IFVENDOR) {
 610                 dev_err(&pdev->dev, "Vendor specific interface. Aborting.\n");
 611                 return ERR_PTR(-ENODEV);
 612         }
 613
 614         if ((pdev->class & 0x0000FF) > PCI_SDHCI_IFVENDOR) {
 615                 dev_err(&pdev->dev, "Unknown interface. Aborting.\n");
 616                 return ERR_PTR(-ENODEV);
 617         }
 618
 619         host = sdhci_alloc_host(&pdev->dev, sizeof(struct sdhci_pci_slot));
 620         if (IS_ERR(host)) {
 621                 dev_err(&pdev->dev, "cannot allocate host\n");
 622                 return ERR_PTR(PTR_ERR(host));
 623         }
 624
 625         slot = sdhci_priv(host);
 626
 627         slot->chip = chip;
 628         slot->host = host;
 629         slot->pci_bar = bar;
 630
 631         host->hw_name = "PCI";
 632         host->ops = &sdhci_pci_ops;
 633         host->quirks = chip->quirks;
 634
 635         host->irq = pdev->irq;
 636
 637         ret = pci_request_region(pdev, bar, mmc_hostname(host->mmc));
 638         if (ret) {
 639                 dev_err(&pdev->dev, "cannot request region\n");
 640                 goto free;
 641         }
 642
 643         addr = pci_resource_start(pdev, bar);
 644         host->ioaddr = pci_ioremap_bar(pdev, bar);
 645         if (!host->ioaddr) {
 646                 dev_err(&pdev->dev, "failed to remap registers\n");
 647                 ret = -ENOMEM;
 648                 goto release;
 649         }
 650
 651         if (chip->fixes && chip->fixes->probe_slot) {
 652                 ret = chip->fixes->probe_slot(slot);
 653                 if (ret)
 654                         goto unmap;
 655         }
 656
 657         ret = sdhci_add_host(host);
 658         if (ret)
 659                 goto remove;
 660
 661         return slot;
 662
 663 remove:
 664         if (chip->fixes && chip->fixes->remove_slot)
 665                 chip->fixes->remove_slot(slot, 0);
 666
 667 unmap:
 668         iounmap(host->ioaddr);
 669
 670 release:
 671         pci_release_region(pdev, bar);
 672
 673 free:
 674         sdhci_free_host(host);
 675
 676         return ERR_PTR(ret);
 677 }
 678
 679 static void sdhci_pci_remove_slot(struct sdhci_pci_slot *slot)
 680 {
 681         int dead;
 682         u32 scratch;
 683
 684         dead = 0;
 685         scratch = readl(slot->host->ioaddr + SDHCI_INT_STATUS);
 686         if (scratch == (u32)-1)
 687                 dead = 1;
 688
 689         sdhci_remove_host(slot->host, dead);
 690
 691         if (slot->chip->fixes && slot->chip->fixes->remove_slot)
 692                 slot->chip->fixes->remove_slot(slot, dead);
 693
 694         pci_release_region(slot->chip->pdev, slot->pci_bar);
 695
 696         sdhci_free_host(slot->host);
 697 }
 698
 699 static int __devinit sdhci_pci_probe(struct pci_dev *pdev,
 700                                      const struct pci_device_id *ent)
 701 {
 702         struct sdhci_pci_chip *chip;
 703         struct sdhci_pci_slot *slot;
 704
 705         u8 slots, rev, first_bar;
 706         int ret, i;
 707
 708         BUG_ON(pdev == NULL);
 709         BUG_ON(ent == NULL);
 710
 711         pci_read_config_byte(pdev, PCI_CLASS_REVISION, &rev);
 712
 713         dev_info(&pdev->dev, "SDHCI controller found [%04x:%04x] (rev %x)\n",
 714                  (int)pdev->vendor, (int)pdev->device, (int)rev);
 715
 716         ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &slots);
 717         if (ret)
 718                 return ret;
 719
 720         slots = PCI_SLOT_INFO_SLOTS(slots) + 1;
 721         dev_dbg(&pdev->dev, "found %d slot(s)\n", slots);
 722         if (slots == 0)
 723                 return -ENODEV;
 724
 725         BUG_ON(slots > MAX_SLOTS);
 726
 727         ret = pci_read_config_byte(pdev, PCI_SLOT_INFO, &first_bar);
 728         if (ret)
 729                 return ret;
 730
 731         first_bar &= PCI_SLOT_INFO_FIRST_BAR_MASK;
 732
 733         if (first_bar > 5) {
 734                 dev_err(&pdev->dev, "Invalid first BAR. Aborting.\n");
 735                 return -ENODEV;
 736         }
 737
 738         ret = pci_enable_device(pdev);
 739         if (ret)
 740                 return ret;
 741
 742         chip = kzalloc(sizeof(struct sdhci_pci_chip), GFP_KERNEL);
 743         if (!chip) {
 744                 ret = -ENOMEM;
 745                 goto err;
 746         }
 747
 748         chip->pdev = pdev;
 749         chip->fixes = (const struct sdhci_pci_fixes*)ent->driver_data;
 750         if (chip->fixes)
 751                 chip->quirks = chip->fixes->quirks;
 752         chip->num_slots = slots;
 753
 754         pci_set_drvdata(pdev, chip);
 755
 756         if (chip->fixes && chip->fixes->probe) {
 757                 ret = chip->fixes->probe(chip);
 758                 if (ret)
 759                         goto free;
 760         }
 761
 762         for (i = 0;i < slots;i++) {
 763                 slot = sdhci_pci_probe_slot(pdev, chip, first_bar + i);
 764                 if (IS_ERR(slot)) {
 765                         for (i--;i >= 0;i--)
 766                                 sdhci_pci_remove_slot(chip->slots[i]);
 767                         ret = PTR_ERR(slot);
 768                         goto free;
 769                 }
 770
 771                 chip->slots[i] = slot;
 772         }
 773
 774         return 0;
 775
 776 free:
 777         pci_set_drvdata(pdev, NULL);
 778         kfree(chip);
 779
 780 err:
 781         pci_disable_device(pdev);
 782         return ret;
 783 }
 784
 785 static void __devexit sdhci_pci_remove(struct pci_dev *pdev)
 786 {
 787         int i;
 788         struct sdhci_pci_chip *chip;
 789
 790         chip = pci_get_drvdata(pdev);
 791
 792         if (chip) {
 793                 for (i = 0;i < chip->num_slots; i++)
 794                         sdhci_pci_remove_slot(chip->slots[i]);
 795
 796                 pci_set_drvdata(pdev, NULL);
 797                 kfree(chip);
 798         }
 799
 800         pci_disable_device(pdev);
 801 }
 802
 803 static struct pci_driver sdhci_driver = {
 804         .name =         "sdhci-pci",
 805         .id_table =     pci_ids,
 806         .probe =        sdhci_pci_probe,
 807         .remove =       __devexit_p(sdhci_pci_remove),
 808         .suspend =      sdhci_pci_suspend,
 809         .resume =       sdhci_pci_resume,
 810 };
 811
 812 /*****************************************************************************\
 813  *                                                                           *
 814  * Driver init/exit                                                          *
 815  *                                                                           *
 816 \*****************************************************************************/
 817
 818 static int __init sdhci_drv_init(void)
 819 {
 820         return pci_register_driver(&sdhci_driver);
 821 }
 822
 823 static void __exit sdhci_drv_exit(void)
 824 {
 825         pci_unregister_driver(&sdhci_driver);
 826 }
 827
 828 module_init(sdhci_drv_init);
 829 module_exit(sdhci_drv_exit);
 830
 831 MODULE_AUTHOR("Pierre Ossman <pierre@ossman.eu>");
 832 MODULE_DESCRIPTION("Secure Digital Host Controller Interface PCI driver");
 833 MODULE_LICENSE("GPL");