e5624054c1
Polling SDIO_CCCR_INTx could create a fake interrupt with Marvell SD8797 card. Add a quirk to handle this case. The fixup here is to issue a dummy CMD52 read to function 0 register 0xff, and this dummy read must be right after SDIO_CCCR_INTx is read. Patch has been verified on a dw_mmc controller (Samsung Chromebook) with MMC_CAP_SDIO_IRQ disabled. Signed-off-by: Bing Zhao <bzhao@marvell.com> Reviewed-by: Paul Stewart <pstew@chromium.org> Reviewed-by: Doug Anderson <dianders@chromium.org> Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Chris Ball <chris@printf.net>
99 lines
2.7 KiB
C
99 lines
2.7 KiB
C
/*
|
|
* 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/sdio_ids.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
|
|
|
|
#ifndef SDIO_DEVICE_ID_MARVELL_8797_F0
|
|
#define SDIO_DEVICE_ID_MARVELL_8797_F0 0x9128
|
|
#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),
|
|
|
|
SDIO_FIXUP(SDIO_VENDOR_ID_MARVELL, SDIO_DEVICE_ID_MARVELL_8797_F0,
|
|
add_quirk, MMC_QUIRK_BROKEN_IRQ_POLLING),
|
|
|
|
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);
|