This patch is added platform_8bit_width() function in sdhci-s3c.
We has 8-bit width support but is not a v3 controller.
So we need platform_8bit_width() to support 8-bit buswidth.
Also we need MMC_CAP_8_BIT_DATA, so we added them in platdata.
Signed-off-by: Jaehoon Chung <jh80.chung@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
drivers/mmc/host/sdhci-s3c.c | 32 ++++++++++++++++++++++++++++++++
1 files changed, 32 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/host/sdhci-s3c.c b/drivers/mmc/host/sdhci-s3c.c
index 70cc3d7..4dc7d6d 100644
--- a/drivers/mmc/host/sdhci-s3c.c
+++ b/drivers/mmc/host/sdhci-s3c.c
@@ -276,10 +276,39 @@ static void sdhci_cmu_set_clock(struct sdhci_host *host, unsigned int clock)
host->clock = clock;
}
+/*
+ * sdhci_s3c_platform_8bit_width - support 8bit buswidth
+ *
+ * We has 8-bit width support but is not a v3 controller.
+ * So we add platform_8bit_width() and support 8bit width.
+ **/
+static int sdhci_s3c_platform_8bit_width(struct sdhci_host *host,
+ int bus_width)
+{
+ u8 ctrl;
+
+ ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
+
+ if (bus_width == MMC_BUS_WIDTH_8)
+ ctrl |= SDHCI_CTRL_8BITBUS;
+ else
+ ctrl &= ~SDHCI_CTRL_8BITBUS;
+
+ if (bus_width == MMC_BUS_WIDTH_4)
+ ctrl |= SDHCI_CTRL_4BITBUS;
+ else
+ ctrl &= ~SDHCI_CTRL_4BITBUS;
+
+ sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
+
+ return 0;
+}
+
static struct sdhci_ops sdhci_s3c_ops = {
.get_max_clock = sdhci_s3c_get_max_clk,
.set_clock = sdhci_s3c_set_clock,
.get_min_clock = sdhci_s3c_get_min_clock,
+ .platform_8bit_width = sdhci_s3c_platform_8bit_width,
};
static void sdhci_s3c_notify_change(struct platform_device *dev, int state)
@@ -472,6 +501,9 @@ static int __devinit sdhci_s3c_probe(struct platform_device *pdev)
if (pdata->cd_type == S3C_SDHCI_CD_PERMANENT)
host->mmc->caps = MMC_CAP_NONREMOVABLE;
+ if (pdata->host_caps)
+ host->mmc->caps |= pdata->host_caps;
+
host->quirks |= (SDHCI_QUIRK_32BIT_DMA_ADDR |
SDHCI_QUIRK_32BIT_DMA_SIZE);
--
1.6.0.4
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