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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: Pavel Pisa <pisa@cmp.felk.cvut.cz>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
This commit is contained in:
Pavel Pisa 2007-09-23 22:59:01 +02:00 committed by Pierre Ossman
parent af8350c756
commit faf39ede5e
3 changed files with 19 additions and 4 deletions
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2
arch/arm/mach-imx/mx1ads.c
View File

@ -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);

16
drivers/mmc/host/imxmmc.c
View File

@ -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;

5
include/asm-arm/arch-imx/mmc.h
View File

@ -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);