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path: root/drivers/mmc/host/mmci.c
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Diffstat (limited to 'drivers/mmc/host/mmci.c')
-rw-r--r--drivers/mmc/host/mmci.c37
1 files changed, 33 insertions, 4 deletions
diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 1bcbdd6763ac..2909bbc8ad00 100644
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -430,6 +430,8 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
clk = 255;
host->cclk = host->mclk / (2 * (clk + 1));
}
+ if (host->hw_designer == 0x80)
+ clk |= MCI_FCEN; /* Bug fix in ST IP block */
clk |= MCI_CLK_ENABLE;
}
@@ -440,15 +442,27 @@ static void mmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
case MMC_POWER_OFF:
break;
case MMC_POWER_UP:
- pwr |= MCI_PWR_UP;
- break;
+ /* The ST version does not have this, fall through to POWER_ON */
+ if (host->hw_designer != 0x80) {
+ pwr |= MCI_PWR_UP;
+ break;
+ }
case MMC_POWER_ON:
pwr |= MCI_PWR_ON;
break;
}
- if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN)
- pwr |= MCI_ROD;
+ if (ios->bus_mode == MMC_BUSMODE_OPENDRAIN) {
+ if (host->hw_designer != 0x80)
+ pwr |= MCI_ROD;
+ else {
+ /*
+ * The ST Micro variant use the ROD bit for something
+ * else and only has OD (Open Drain).
+ */
+ pwr |= MCI_OD;
+ }
+ }
writel(clk, host->base + MMCICLOCK);
@@ -500,6 +514,12 @@ static int mmci_probe(struct amba_device *dev, void *id)
}
host = mmc_priv(mmc);
+ /* Bits 12 thru 19 is the designer */
+ host->hw_designer = (dev->periphid >> 12) & 0xff;
+ /* Bits 20 thru 23 is the revison */
+ host->hw_revision = (dev->periphid >> 20) & 0xf;
+ DBG(host, "designer ID = 0x%02x\n", host->hw_designer);
+ DBG(host, "revision = 0x%01x\n", host->hw_revision);
host->clk = clk_get(&dev->dev, NULL);
if (IS_ERR(host->clk)) {
ret = PTR_ERR(host->clk);
@@ -693,6 +713,15 @@ static struct amba_id mmci_ids[] = {
.id = 0x00041181,
.mask = 0x000fffff,
},
+ /* ST Micro variants */
+ {
+ .id = 0x00180180,
+ .mask = 0x00ffffff,
+ },
+ {
+ .id = 0x00280180,
+ .mask = 0x00ffffff,
+ },
{ 0, 0 },
};