summaryrefslogtreecommitdiffstats
path: root/drivers/mmc
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/atmel-mci-regs.h6
-rw-r--r--drivers/mmc/host/atmel-mci.c24
2 files changed, 24 insertions, 6 deletions
diff --git a/drivers/mmc/host/atmel-mci-regs.h b/drivers/mmc/host/atmel-mci-regs.h
index 26bd80e..b58364e 100644
--- a/drivers/mmc/host/atmel-mci-regs.h
+++ b/drivers/mmc/host/atmel-mci-regs.h
@@ -25,8 +25,10 @@
#define MCI_SDCR 0x000c /* SD Card / SDIO */
# define MCI_SDCSEL_SLOT_A ( 0 << 0) /* Select SD slot A */
# define MCI_SDCSEL_SLOT_B ( 1 << 0) /* Select SD slot A */
-# define MCI_SDCBUS_1BIT ( 0 << 7) /* 1-bit data bus */
-# define MCI_SDCBUS_4BIT ( 1 << 7) /* 4-bit data bus */
+# define MCI_SDCSEL_MASK ( 3 << 0)
+# define MCI_SDCBUS_1BIT ( 0 << 6) /* 1-bit data bus */
+# define MCI_SDCBUS_4BIT ( 2 << 6) /* 4-bit data bus */
+# define MCI_SDCBUS_MASK ( 3 << 6)
#define MCI_ARGR 0x0010 /* Command Argument */
#define MCI_CMDR 0x0014 /* Command */
# define MCI_CMDR_CMDNB(x) ((x) << 0) /* Command Opcode */
diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
index 14ab28d..8170905 100644
--- a/drivers/mmc/host/atmel-mci.c
+++ b/drivers/mmc/host/atmel-mci.c
@@ -508,9 +508,10 @@ static void atmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
{
struct atmel_mci *host = mmc_priv(mmc);
+ host->sdc_reg &= ~MCI_SDCBUS_MASK;
switch (ios->bus_width) {
case MMC_BUS_WIDTH_1:
- host->sdc_reg = 0;
+ host->sdc_reg |= MCI_SDCBUS_1BIT;
break;
case MMC_BUS_WIDTH_4:
host->sdc_reg = MCI_SDCBUS_4BIT;
@@ -1014,9 +1015,11 @@ static irqreturn_t atmci_detect_interrupt(int irq, void *dev_id)
static int __init atmci_probe(struct platform_device *pdev)
{
struct mci_platform_data *pdata;
+ struct mci_slot_pdata *slot;
struct atmel_mci *host;
struct mmc_host *mmc;
struct resource *regs;
+ u32 sdc_reg;
int irq;
int ret;
@@ -1030,6 +1033,17 @@ static int __init atmci_probe(struct platform_device *pdev)
if (irq < 0)
return irq;
+ /* TODO: Allow using several slots at once */
+ if (pdata->slot[0].bus_width) {
+ sdc_reg = MCI_SDCSEL_SLOT_A;
+ slot = &pdata->slot[0];
+ } else if (pdata->slot[1].bus_width) {
+ sdc_reg = MCI_SDCSEL_SLOT_B;
+ slot = &pdata->slot[1];
+ } else {
+ return -EINVAL;
+ }
+
mmc = mmc_alloc_host(sizeof(struct atmel_mci), &pdev->dev);
if (!mmc)
return -ENOMEM;
@@ -1037,8 +1051,9 @@ static int __init atmci_probe(struct platform_device *pdev)
host = mmc_priv(mmc);
host->pdev = pdev;
host->mmc = mmc;
- host->detect_pin = pdata->detect_pin;
- host->wp_pin = pdata->wp_pin;
+ host->detect_pin = slot->detect_pin;
+ host->wp_pin = slot->wp_pin;
+ host->sdc_reg = sdc_reg;
host->mck = clk_get(&pdev->dev, "mci_clk");
if (IS_ERR(host->mck)) {
@@ -1062,7 +1077,8 @@ static int __init atmci_probe(struct platform_device *pdev)
mmc->f_min = (host->bus_hz + 511) / 512;
mmc->f_max = host->bus_hz / 2;
mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
- mmc->caps |= MMC_CAP_4_BIT_DATA;
+ if (slot->bus_width >= 4)
+ mmc->caps |= MMC_CAP_4_BIT_DATA;
mmc->max_hw_segs = 64;
mmc->max_phys_segs = 64;
OpenPOWER on IntegriCloud