quirks.c

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/*
 *  This file contains work-arounds for many known SD/MMC
 *  and SDIO hardware bugs.
 *
 *  Copyright (c) 2011 Andrei Warkentin <[email protected]>
 *  Copyright (c) 2011 Pierre Tardy <[email protected]>
 *  Inspired from pci fixup code:
 *  Copyright (c) 1999 Martin Mares <[email protected]>
 *
 */

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/mmc/card.h>

#ifndef SDIO_VENDOR_ID_TI
#define SDIO_VENDOR_ID_TI       0x0097
#endif

#ifndef SDIO_DEVICE_ID_TI_WL1271
#define SDIO_DEVICE_ID_TI_WL1271    0x4076
#endif

#ifndef SDIO_VENDOR_ID_STE
#define SDIO_VENDOR_ID_STE      0x0020
#endif

#ifndef SDIO_DEVICE_ID_STE_CW1200
#define SDIO_DEVICE_ID_STE_CW1200   0x2280
#endif

/*
 * This hook just adds a quirk for all sdio devices
 */
static void add_quirk_for_sdio_devices(struct mmc_card *card, int data)
{
    if (mmc_card_sdio(card))
        card->quirks |= data;
}

static const struct mmc_fixup mmc_fixup_methods[] = {
    /* by default sdio devices are considered CLK_GATING broken */
    /* good cards will be whitelisted as they are tested */
    SDIO_FIXUP(SDIO_ANY_ID, SDIO_ANY_ID,
           add_quirk_for_sdio_devices,
           MMC_QUIRK_BROKEN_CLK_GATING),

    SDIO_FIXUP(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271,
           remove_quirk, MMC_QUIRK_BROKEN_CLK_GATING),

    SDIO_FIXUP(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271,
           add_quirk, MMC_QUIRK_NONSTD_FUNC_IF),

    SDIO_FIXUP(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271,
           add_quirk, MMC_QUIRK_DISABLE_CD),

    SDIO_FIXUP(SDIO_VENDOR_ID_STE, SDIO_DEVICE_ID_STE_CW1200,
           add_quirk, MMC_QUIRK_BROKEN_BYTE_MODE_512),

    END_FIXUP
};

void mmc_fixup_device(struct mmc_card *card, const struct mmc_fixup *table)
{
    const struct mmc_fixup *f;
    u64 rev = cid_rev_card(card);

    /* Non-core specific workarounds. */
    if (!table)
        table = mmc_fixup_methods;

    for (f = table; f->vendor_fixup; f++) {
        if ((f->manfid == CID_MANFID_ANY ||
             f->manfid == card->cid.manfid) &&
            (f->oemid == CID_OEMID_ANY ||
             f->oemid == card->cid.oemid) &&
            (f->name == CID_NAME_ANY ||
             !strncmp(f->name, card->cid.prod_name,
                  sizeof(card->cid.prod_name))) &&
            (f->cis_vendor == card->cis.vendor ||
             f->cis_vendor == (u16) SDIO_ANY_ID) &&
            (f->cis_device == card->cis.device ||
             f->cis_device == (u16) SDIO_ANY_ID) &&
            rev >= f->rev_start && rev <= f->rev_end) {
            dev_dbg(&card->dev, "calling %pF\n", f->vendor_fixup);
            f->vendor_fixup(card, f->data);
        }
    }
}
EXPORT_SYMBOL(mmc_fixup_device);