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authorTushar Behera <tushar.behera@linaro.org>2012-09-20 20:31:57 +0000
committerAndy Fleming <afleming@freescale.com>2012-10-22 02:53:36 -0500
commit13243f2eafc4292917178051fe1bb5aab2774dca (patch)
treead66677b0f99f5daae35d5ef0e750e51931eb25d
parent804c7f422169212e92530e1ddaf74bf1ca9ebfa1 (diff)
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mmc: sdhci: Add a quirk to add delay during completion of sdhci_send_cmd
MMC host controller requires a delay between every sdhci_send_cmd() execution. In s5p_mmc driver (s5p_sdhci replaces this driver), a delay of 1000us was provided after every mmc_send_cmd() call. Adding a quirk in current sdhci driver to replicate the behaviour. Without this delay, MMC initialization on Origen board fails with following error messages. Timeout for status update! mmc fail to send stop cmd Signed-off-by: Tushar Behera <tushar.behera@linaro.org> Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com> Signed-off-by: Andy Fleming <afleming@freescale.com>
-rw-r--r--drivers/mmc/s5p_sdhci.c3
-rw-r--r--drivers/mmc/sdhci.c3
-rw-r--r--include/sdhci.h1
3 files changed, 6 insertions, 1 deletions
diff --git a/drivers/mmc/s5p_sdhci.c b/drivers/mmc/s5p_sdhci.c
index b978236..dc49d37 100644
--- a/drivers/mmc/s5p_sdhci.c
+++ b/drivers/mmc/s5p_sdhci.c
@@ -83,7 +83,8 @@ int s5p_sdhci_init(u32 regbase, int index, int bus_width)
host->ioaddr = (void *)regbase;
host->quirks = SDHCI_QUIRK_NO_HISPD_BIT | SDHCI_QUIRK_BROKEN_VOLTAGE |
- SDHCI_QUIRK_BROKEN_R1B | SDHCI_QUIRK_32BIT_DMA_ADDR;
+ SDHCI_QUIRK_BROKEN_R1B | SDHCI_QUIRK_32BIT_DMA_ADDR |
+ SDHCI_QUIRK_WAIT_SEND_CMD;
host->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index 15b4686..7845f87 100644
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -240,6 +240,9 @@ int sdhci_send_command(struct mmc *mmc, struct mmc_cmd *cmd,
if (!ret && data)
ret = sdhci_transfer_data(host, data, start_addr);
+ if (host->quirks & SDHCI_QUIRK_WAIT_SEND_CMD)
+ udelay(1000);
+
stat = sdhci_readl(host, SDHCI_INT_STATUS);
sdhci_writel(host, SDHCI_INT_ALL_MASK, SDHCI_INT_STATUS);
if (!ret) {
diff --git a/include/sdhci.h b/include/sdhci.h
index c0345ed..c44793d 100644
--- a/include/sdhci.h
+++ b/include/sdhci.h
@@ -224,6 +224,7 @@
#define SDHCI_QUIRK_NO_HISPD_BIT (1 << 3)
#define SDHCI_QUIRK_BROKEN_VOLTAGE (1 << 4)
#define SDHCI_QUIRK_NO_CD (1 << 5)
+#define SDHCI_QUIRK_WAIT_SEND_CMD (1 << 6)
/* to make gcc happy */
struct sdhci_host;