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path: root/drivers/mmc/sdhci.c
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Diffstat (limited to 'drivers/mmc/sdhci.c')
-rw-r--r--drivers/mmc/sdhci.c17
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index 9a7d39b7cdbf..cd98117632d3 100644
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -616,6 +616,7 @@ static void sdhci_finish_command(struct sdhci_host *host)
static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
{
int div;
+ u8 ctrl;
u16 clk;
unsigned long timeout;
@@ -624,6 +625,13 @@ static void sdhci_set_clock(struct sdhci_host *host, unsigned int clock)
writew(0, host->ioaddr + SDHCI_CLOCK_CONTROL);
+ ctrl = readb(host->ioaddr + SDHCI_HOST_CONTROL);
+ if (clock > 25000000)
+ ctrl |= SDHCI_CTRL_HISPD;
+ else
+ ctrl &= ~SDHCI_CTRL_HISPD;
+ writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
+
if (clock == 0)
goto out;
@@ -784,7 +792,7 @@ static int sdhci_get_ro(struct mmc_host *mmc)
return !(present & SDHCI_WRITE_PROTECT);
}
-static struct mmc_host_ops sdhci_ops = {
+static const struct mmc_host_ops sdhci_ops = {
.request = sdhci_request,
.set_ios = sdhci_set_ios,
.get_ro = sdhci_get_ro,
@@ -1291,6 +1299,13 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
else if (caps & SDHCI_CAN_VDD_180)
mmc->ocr_avail |= MMC_VDD_17_18|MMC_VDD_18_19;
+ if ((host->max_clk > 25000000) && !(caps & SDHCI_CAN_DO_HISPD)) {
+ printk(KERN_ERR "%s: Controller reports > 25 MHz base clock,"
+ " but no high speed support.\n",
+ host->slot_descr);
+ mmc->f_max = 25000000;
+ }
+
if (mmc->ocr_avail == 0) {
printk(KERN_ERR "%s: Hardware doesn't report any "
"support voltages.\n", host->slot_descr);