omap_hsmmc: Add 8-bit bus width mode support

Signed-off-by: Jarkko Lavinen <jarkko.lavinen@nokia.com>
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

1 files changed, 11 insertions, 1 deletions

diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index 483e591f7bbb..fd1657ad2a74 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -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);