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/*
* This file contains work-arounds for many known SD/MMC
* and SDIO hardware bugs.
*
* Copyright (c) 2011 Andrei Warkentin <andreiw@motorola.com>
* Copyright (c) 2011 Pierre Tardy <tardyp@gmail.com>
* Inspired from pci fixup code:
* Copyright (c) 1999 Martin Mares <mj@ucw.cz>
*
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/mmc/card.h>
#include <linux/mmc/host.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
};
/*
* Some product name in CID may contain '\n' or other non-name
* character. So use below func to compare name.
*/
static int str_cmp(const char *dst, const char *src)
{
int i = 0;
if (NULL == dst || NULL == src)
return 0;
while (dst[i] != '\0' && src[i] != '\0') {
if (dst[i] != src[i])
return 0;
i++;
}
return 1;
}
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 ||
str_cmp((const char *)f->name,
(const char *)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);
void dis_cache_mmc(struct mmc_card *card, int data)
{
if (mmc_card_mmc(card)) {
mmc_claim_host(card->host);
pr_warn("%s: enther dis_cache_mmc.\n",
mmc_hostname(card->host));
mmc_cache_ctrl(card->host, 0);
card->host->caps2 &= ~MMC_CAP2_CACHE_CTRL;
mmc_release_host(card->host);
}
}
EXPORT_SYMBOL(dis_cache_mmc);
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