LXR linux/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/export.h>
  15#include <linux/mmc/card.h>
  16
  17#ifndef SDIO_VENDOR_ID_TI
  18#define SDIO_VENDOR_ID_TI               0x0097
  19#endif
  20
  21#ifndef SDIO_DEVICE_ID_TI_WL1271
  22#define SDIO_DEVICE_ID_TI_WL1271        0x4076
  23#endif
  24
  25#ifndef SDIO_VENDOR_ID_STE
  26#define SDIO_VENDOR_ID_STE              0x0020
  27#endif
  28
  29#ifndef SDIO_DEVICE_ID_STE_CW1200
  30#define SDIO_DEVICE_ID_STE_CW1200       0x2280
  31#endif
  32
  33/*
  34 * This hook just adds a quirk for all sdio devices
  35 */
  36static void add_quirk_for_sdio_devices(struct mmc_card *card, int data)
  37{
  38        if (mmc_card_sdio(card))
  39                card->quirks |= data;
  40}
  41
  42static const struct mmc_fixup mmc_fixup_methods[] = {
  43        /* by default sdio devices are considered CLK_GATING broken */
  44        /* good cards will be whitelisted as they are tested */
  45        SDIO_FIXUP(SDIO_ANY_ID, SDIO_ANY_ID,
  46                   add_quirk_for_sdio_devices,
  47                   MMC_QUIRK_BROKEN_CLK_GATING),
  48
  49        SDIO_FIXUP(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271,
  50                   remove_quirk, MMC_QUIRK_BROKEN_CLK_GATING),
  51
  52        SDIO_FIXUP(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271,
  53                   add_quirk, MMC_QUIRK_NONSTD_FUNC_IF),
  54
  55        SDIO_FIXUP(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271,
  56                   add_quirk, MMC_QUIRK_DISABLE_CD),
  57
  58        SDIO_FIXUP(SDIO_VENDOR_ID_STE, SDIO_DEVICE_ID_STE_CW1200,
  59                   add_quirk, MMC_QUIRK_BROKEN_BYTE_MODE_512),
  60
  61        END_FIXUP
  62};
  63
  64void mmc_fixup_device(struct mmc_card *card, const struct mmc_fixup *table)
  65{
  66        const struct mmc_fixup *f;
  67        u64 rev = cid_rev_card(card);
  68
  69        /* Non-core specific workarounds. */
  70        if (!table)
  71                table = mmc_fixup_methods;
  72
  73        for (f = table; f->vendor_fixup; f++) {
  74                if ((f->manfid == CID_MANFID_ANY ||
  75                     f->manfid == card->cid.manfid) &&
  76                    (f->oemid == CID_OEMID_ANY ||
  77                     f->oemid == card->cid.oemid) &&
  78                    (f->name == CID_NAME_ANY ||
  79                     !strncmp(f->name, card->cid.prod_name,
  80                              sizeof(card->cid.prod_name))) &&
  81                    (f->cis_vendor == card->cis.vendor ||
  82                     f->cis_vendor == (u16) SDIO_ANY_ID) &&
  83                    (f->cis_device == card->cis.device ||
  84                     f->cis_device == (u16) SDIO_ANY_ID) &&
  85                    rev >= f->rev_start && rev <= f->rev_end) {
  86                        dev_dbg(&card->dev, "calling %pF\n", f->vendor_fixup);
  87                        f->vendor_fixup(card, f->data);
  88                }
  89        }
  90}
  91EXPORT_SYMBOL(mmc_fixup_device);
  92