提交 73153010 编写于 作者: J Jarkko Lavinen 提交者: Pierre Ossman

omap_hsmmc: Add 8-bit bus width mode support

Signed-off-by: NJarkko Lavinen <jarkko.lavinen@nokia.com>
Signed-off-by: NPierre Ossman <drzeus@drzeus.cx>
上级 0ccd76d4
......@@ -77,6 +77,7 @@
#define MSBS (1 << 5)
#define BCE (1 << 1)
#define FOUR_BIT (1 << 1)
#define DW8 (1 << 5)
#define CC 0x1
#define TC 0x02
#define OD 0x1
......@@ -817,6 +818,7 @@ static void omap_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
u16 dsor = 0;
unsigned long regval;
unsigned long timeout;
u32 con;
switch (ios->power_mode) {
case MMC_POWER_OFF:
......@@ -827,12 +829,18 @@ static void omap_mmc_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
break;
}
con = OMAP_HSMMC_READ(host->base, CON);
switch (mmc->ios.bus_width) {
case MMC_BUS_WIDTH_8:
OMAP_HSMMC_WRITE(host->base, CON, con | DW8);
break;
case MMC_BUS_WIDTH_4:
OMAP_HSMMC_WRITE(host->base, CON, con & ~DW8);
OMAP_HSMMC_WRITE(host->base, HCTL,
OMAP_HSMMC_READ(host->base, HCTL) | FOUR_BIT);
break;
case MMC_BUS_WIDTH_1:
OMAP_HSMMC_WRITE(host->base, CON, con & ~DW8);
OMAP_HSMMC_WRITE(host->base, HCTL,
OMAP_HSMMC_READ(host->base, HCTL) & ~FOUR_BIT);
break;
......@@ -1057,7 +1065,9 @@ static int __init omap_mmc_probe(struct platform_device *pdev)
mmc->ocr_avail = mmc_slot(host).ocr_mask;
mmc->caps |= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_SD_HIGHSPEED;
if (pdata->slots[host->slot_id].wires >= 4)
if (pdata->slots[host->slot_id].wires >= 8)
mmc->caps |= MMC_CAP_8_BIT_DATA;
else if (pdata->slots[host->slot_id].wires >= 4)
mmc->caps |= MMC_CAP_4_BIT_DATA;
omap_hsmmc_init(host);
......
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