drivers/mmc/core/quirks.c

   1 /*
   2  *  This file contains work-arounds for many known SD/MMC
   3  *  and SDIO hardware bugs.
   4  *
   5  *  Copyright (c) 2011 Andrei Warkentin <andreiw@motorola.com>
   6  *  Copyright (c) 2011 Pierre Tardy <tardyp@gmail.com>
   7  *  Inspired from pci fixup code:
   8  *  Copyright (c) 1999 Martin Mares <mj@ucw.cz>
   9  *
  10  */
  11
  12 #include <linux/types.h>
  13 #include <linux/kernel.h>
  14 #include <linux/mmc/card.h>
  15
  16 #ifndef SDIO_VENDOR_ID_TI
  17 #define SDIO_VENDOR_ID_TI               0x0097
  18 #endif
  19
  20 #ifndef SDIO_DEVICE_ID_TI_WL1271
  21 #define SDIO_DEVICE_ID_TI_WL1271        0x4076
  22 #endif
  23
  24 /*
  25  * This hook just adds a quirk for all sdio devices
  26  */
  27 static void add_quirk_for_sdio_devices(struct mmc_card *card, int data)
  28 {
  29         if (mmc_card_sdio(card))
  30                 card->quirks |= data;
  31 }
  32
  33 static const struct mmc_fixup mmc_fixup_methods[] = {
  34         /* by default sdio devices are considered CLK_GATING broken */
  35         /* good cards will be whitelisted as they are tested */
  36         SDIO_FIXUP(SDIO_ANY_ID, SDIO_ANY_ID,
  37                    add_quirk_for_sdio_devices,
  38                    MMC_QUIRK_BROKEN_CLK_GATING),
  39
  40         SDIO_FIXUP(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271,
  41                    remove_quirk, MMC_QUIRK_BROKEN_CLK_GATING),
  42
  43         SDIO_FIXUP(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271,
  44                    add_quirk, MMC_QUIRK_NONSTD_FUNC_IF),
  45
  46         SDIO_FIXUP(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271,
  47                    add_quirk, MMC_QUIRK_DISABLE_CD),
  48
  49         END_FIXUP
  50 };
  51
  52 void mmc_fixup_device(struct mmc_card *card, const struct mmc_fixup *table)
  53 {
  54         const struct mmc_fixup *f;
  55         u64 rev = cid_rev_card(card);
  56
  57         /* Non-core specific workarounds. */
  58         if (!table)
  59                 table = mmc_fixup_methods;
  60
  61         for (f = table; f->vendor_fixup; f++) {
  62                 if ((f->manfid == CID_MANFID_ANY ||
  63                      f->manfid == card->cid.manfid) &&
  64                     (f->oemid == CID_OEMID_ANY ||
  65                      f->oemid == card->cid.oemid) &&
  66                     (f->name == CID_NAME_ANY ||
  67                      !strncmp(f->name, card->cid.prod_name,
  68                               sizeof(card->cid.prod_name))) &&
  69                     (f->cis_vendor == card->cis.vendor ||
  70                      f->cis_vendor == (u16) SDIO_ANY_ID) &&
  71                     (f->cis_device == card->cis.device ||
  72                      f->cis_device == (u16) SDIO_ANY_ID) &&
  73                     rev >= f->rev_start && rev <= f->rev_end) {
  74                         dev_dbg(&card->dev, "calling %pF\n", f->vendor_fixup);
  75                         f->vendor_fixup(card, f->data);
  76                 }
  77         }
  78 }
  79 EXPORT_SYMBOL(mmc_fixup_device);