Commit faf39ede authored by Pavel Pisa's avatar Pavel Pisa Committed by Pierre Ossman
Browse files

arm: i.MX/MX1 SDHC implements SD cards read-only switch read-back 



The patch enables to define MMC host get_ro() method through platform data.

Signed-off-by: default avatarPavel Pisa <pisa@cmp.felk.cvut.cz>
Signed-off-by: default avatarPierre Ossman <drzeus@drzeus.cx>
parent af8350c7

arch/arm/mach-imx/mx1ads.c

+1 −1
Original line number Diff line number Diff line
@@ -116,7 +116,7 @@ static struct platform_device *devices[] __initdata = { 
};



#ifdef CONFIG_MMC_IMX

static int mx1ads_mmc_card_present(void)

static int mx1ads_mmc_card_present(struct device *dev)

{

	/* MMC/SD Card Detect is PB 20 on MX1ADS V1.0.7 */

	return (SSR(1) & (1 << 20) ? 0 : 1);

drivers/mmc/host/imxmmc.c

+14 −2
Original line number Diff line number Diff line
@@ -884,9 +884,21 @@ static void imxmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) 
	}

}



static int imxmci_get_ro(struct mmc_host *mmc)

{

	struct imxmci_host *host = mmc_priv(mmc);



	if (host->pdata && host->pdata->get_ro)

		return host->pdata->get_ro(mmc_dev(mmc));

	/* Host doesn't support read only detection so assume writeable */

	return 0;

}





static const struct mmc_host_ops imxmci_ops = {

	.request	= imxmci_request,

	.set_ios	= imxmci_set_ios,

	.get_ro		= imxmci_get_ro,

};



static struct resource *platform_device_resource(struct platform_device *dev, unsigned int mask, int nr)
@@ -913,7 +925,7 @@ static void imxmci_check_status(unsigned long data) 
{

	struct imxmci_host *host = (struct imxmci_host *)data;



	if( host->pdata->card_present() != host->present ) {

	if( host->pdata->card_present(mmc_dev(host->mmc)) != host->present ) {

		host->present ^= 1;

		dev_info(mmc_dev(host->mmc), "card %s\n",

		      host->present ? "inserted" : "removed");
@@ -1022,7 +1034,7 @@ static int imxmci_probe(struct platform_device *pdev) 
	if (ret)

		goto out;



	host->present = host->pdata->card_present();

	host->present = host->pdata->card_present(mmc_dev(mmc));

	init_timer(&host->timer);

	host->timer.data = (unsigned long)host;

	host->timer.function = imxmci_check_status;

include/asm-arm/arch-imx/mmc.h

+4 −1
Original line number Diff line number Diff line
@@ -3,8 +3,11 @@ 


#include <linux/mmc/host.h>



struct device;



struct imxmmc_platform_data {

	int (*card_present)(void);

	int (*card_present)(struct device *);

	int (*get_ro)(struct device *);

};



extern void imx_set_mmc_info(struct imxmmc_platform_data *info);