Commit 57f0adc7 authored by Pierre Tardy's avatar Pierre Tardy Committed by Chris Ball
Browse files

mmc: add per device quirk placeholder 



Some cards have quirks valid for every platforms using current
platform quirk hooks leads to a lot of code and debug duplication.

So we inspire a bit from what exists in PCI subsystem and do our own
per vendorid/deviceid quirk.  We still drop the complexity of the pci
quirk system (with special section tables, and so on).
That can be added later if needed.

Signed-off-by: default avatarPierre Tardy <pierre.tardy@intel.com>
Acked-by: default avatarLinus Walleij <linus.walleij@stericsson.com>
Acked-by: default avatarOhad Ben-Cohen <ohad@wizery.com>
Signed-off-by: default avatarChris Ball <cjb@laptop.org>
parent 66c036e0

drivers/mmc/core/Makefile

+2 −1
Original line number Diff line number Diff line
@@ -6,6 +6,7 @@ obj-$(CONFIG_MMC) += mmc_core.o 
mmc_core-y			:= core.o bus.o host.o \

				   mmc.o mmc_ops.o sd.o sd_ops.o \

				   sdio.o sdio_ops.o sdio_bus.o \

				   sdio_cis.o sdio_io.o sdio_irq.o

				   sdio_cis.o sdio_io.o sdio_irq.o \

				   quirks.o



mmc_core-$(CONFIG_DEBUG_FS)	+= debugfs.o

drivers/mmc/core/core.h

+2 −0
Original line number Diff line number Diff line
@@ -61,6 +61,8 @@ int mmc_attach_mmc(struct mmc_host *host); 
int mmc_attach_sd(struct mmc_host *host);

int mmc_attach_sdio(struct mmc_host *host);



void mmc_fixup_device(struct mmc_card *card);



/* Module parameters */

extern int use_spi_crc;

drivers/mmc/core/quirks.c

0 → 100644
+61 −0
Original line number Diff line number Diff line 
/*

 *  This file contains work-arounds for many known sdio hardware

 *  bugs.

 *

 *  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/mmc/card.h>

#include <linux/mod_devicetable.h>



/*

 *  The world is not perfect and supplies us with broken mmc/sdio devices.

 *  For at least a part of these bugs we need a work-around

 */



struct mmc_fixup {

	u16 vendor, device;	/* You can use SDIO_ANY_ID here of course */

	void (*vendor_fixup)(struct mmc_card *card, int data);

	int data;

};



/*

 * This hook just adds a quirk unconditionnally

 */

static void __maybe_unused add_quirk(struct mmc_card *card, int data)

{

	card->quirks |= data;

}



/*

 * This hook just removes a quirk unconditionnally

 */

static void __maybe_unused remove_quirk(struct mmc_card *card, int data)

{

	card->quirks &= ~data;

}



static const struct mmc_fixup mmc_fixup_methods[] = {

	{ 0 }

};



void mmc_fixup_device(struct mmc_card *card)

{

	const struct mmc_fixup *f;



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

		if ((f->vendor == card->cis.vendor

		     || f->vendor == (u16) SDIO_ANY_ID) &&

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

		     || f->device == (u16) SDIO_ANY_ID)) {

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

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

		}

	}

}

EXPORT_SYMBOL(mmc_fixup_device);

drivers/mmc/core/sdio.c

+1 −0
Original line number Diff line number Diff line
@@ -458,6 +458,7 @@ static int mmc_sdio_init_card(struct mmc_host *host, u32 ocr, 


		card = oldcard;

	}

	mmc_fixup_device(card);



	if (card->type == MMC_TYPE_SD_COMBO) {

		err = mmc_sd_setup_card(host, card, oldcard != NULL);

include/linux/mmc/card.h

+2 −0
Original line number Diff line number Diff line
@@ -151,6 +151,8 @@ struct mmc_card { 
	struct dentry		*debugfs_root;

};



void mmc_fixup_device(struct mmc_card *dev);



#define mmc_card_mmc(c)		((c)->type == MMC_TYPE_MMC)

#define mmc_card_sd(c)		((c)->type == MMC_TYPE_SD)

#define mmc_card_sdio(c)	((c)->type == MMC_TYPE_SDIO)

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