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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/drivers/mmc/core/quirks.c
15109 views
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/*

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 *  This file contains work-arounds for many known SD/MMC

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 *  and SDIO hardware bugs.

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 *

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 *  Copyright (c) 2011 Andrei Warkentin <[email protected]>

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 *  Copyright (c) 2011 Pierre Tardy <[email protected]>

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 *  Inspired from pci fixup code:

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 *  Copyright (c) 1999 Martin Mares <[email protected]>

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 *

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 */

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#include <linux/types.h>

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#include <linux/kernel.h>

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#include <linux/mmc/card.h>

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#ifndef SDIO_VENDOR_ID_TI

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#define SDIO_VENDOR_ID_TI		0x0097

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#endif

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#ifndef SDIO_DEVICE_ID_TI_WL1271

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#define SDIO_DEVICE_ID_TI_WL1271	0x4076

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#endif

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/*

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 * This hook just adds a quirk for all sdio devices

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 */

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static void add_quirk_for_sdio_devices(struct mmc_card *card, int data)

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{

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	if (mmc_card_sdio(card))

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		card->quirks |= data;

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}

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static const struct mmc_fixup mmc_fixup_methods[] = {

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	/* by default sdio devices are considered CLK_GATING broken */

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	/* good cards will be whitelisted as they are tested */

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	SDIO_FIXUP(SDIO_ANY_ID, SDIO_ANY_ID,

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		   add_quirk_for_sdio_devices,

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		   MMC_QUIRK_BROKEN_CLK_GATING),

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	SDIO_FIXUP(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271,

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		   remove_quirk, MMC_QUIRK_BROKEN_CLK_GATING),

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	SDIO_FIXUP(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271,

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		   add_quirk, MMC_QUIRK_NONSTD_FUNC_IF),

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	SDIO_FIXUP(SDIO_VENDOR_ID_TI, SDIO_DEVICE_ID_TI_WL1271,

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		   add_quirk, MMC_QUIRK_DISABLE_CD),

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	END_FIXUP

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};

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void mmc_fixup_device(struct mmc_card *card, const struct mmc_fixup *table)

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{

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	const struct mmc_fixup *f;

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	u64 rev = cid_rev_card(card);

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	/* Non-core specific workarounds. */

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	if (!table)

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		table = mmc_fixup_methods;

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	for (f = table; f->vendor_fixup; f++) {

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		if ((f->manfid == CID_MANFID_ANY ||

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		     f->manfid == card->cid.manfid) &&

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		    (f->oemid == CID_OEMID_ANY ||

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		     f->oemid == card->cid.oemid) &&

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		    (f->name == CID_NAME_ANY ||

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		     !strncmp(f->name, card->cid.prod_name,

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			      sizeof(card->cid.prod_name))) &&

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		    (f->cis_vendor == card->cis.vendor ||

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		     f->cis_vendor == (u16) SDIO_ANY_ID) &&

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		    (f->cis_device == card->cis.device ||

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		     f->cis_device == (u16) SDIO_ANY_ID) &&

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		    rev >= f->rev_start && rev <= f->rev_end) {

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			dev_dbg(&card->dev, "calling %pF\n", f->vendor_fixup);

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			f->vendor_fixup(card, f->data);

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		}

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	}

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}

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EXPORT_SYMBOL(mmc_fixup_device);

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