@@ -15,6 +15,8 @@
#include <linux/mmc/slot-gpio.h>
#include "sdhci-pltfm.h"
+#define SDHCI_SIRF_8BITBUS BIT(3)
+
struct sdhci_sirf_priv {
struct clk *clk;
int gpio_cd;
@@ -27,10 +29,34 @@ static unsigned int sdhci_sirf_get_max_clk(struct sdhci_host *host)
return clk_get_rate(priv->clk);
}
+static void sdhci_sirf_set_bus_width(struct sdhci_host *host, int width)
+{
+ u8 ctrl;
+
+ ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
+ if (width == MMC_BUS_WIDTH_8) {
+ ctrl &= ~SDHCI_CTRL_4BITBUS;
+ /*
+ * 8bit-width enable bit of CSR MMC hosts is 3,
+ * while stardard hosts use bit 5
+ */
+ if (host->version >= SDHCI_SPEC_300)
+ ctrl |= SDHCI_SIRF_8BITBUS;
+ } else {
+ if (host->version >= SDHCI_SPEC_300)
+ ctrl &= ~SDHCI_SIRF_8BITBUS;
+ if (width == MMC_BUS_WIDTH_4)
+ ctrl |= SDHCI_CTRL_4BITBUS;
+ else
+ ctrl &= ~SDHCI_CTRL_4BITBUS;
+ }
+ sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
+}
+
static struct sdhci_ops sdhci_sirf_ops = {
.set_clock = sdhci_set_clock,
.get_max_clock = sdhci_sirf_get_max_clk,
- .set_bus_width = sdhci_set_bus_width,
+ .set_bus_width = sdhci_sirf_set_bus_width,
.reset = sdhci_reset,
.set_uhs_signaling = sdhci_set_uhs_signaling,
};