diff options
Diffstat (limited to 'drivers/mmc/host/sdhci-sirf.c')
| -rw-r--r-- | drivers/mmc/host/sdhci-sirf.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/drivers/mmc/host/sdhci-sirf.c b/drivers/mmc/host/sdhci-sirf.c index e15dc891ba01..68a39718a171 100644 --- a/drivers/mmc/host/sdhci-sirf.c +++ b/drivers/mmc/host/sdhci-sirf.c @@ -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 +29,30 @@ 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); + ctrl &= ~(SDHCI_CTRL_4BITBUS | SDHCI_SIRF_8BITBUS); + + /* + * CSR atlas7 and prima2 SD host version is not 3.0 + * 8bit-width enable bit of CSR SD hosts is 3, + * while stardard hosts use bit 5 + */ + if (width == MMC_BUS_WIDTH_8) + ctrl |= SDHCI_SIRF_8BITBUS; + else if (width == MMC_BUS_WIDTH_4) + 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, }; |