From: Dinh Nguyen <dinguyen@xxxxxxxxxx>
Add code to read value of the use_hold_reg in the cmd register so that
the cmdflags can be correct.
Signed-off-by: Dinh Nguyen <dinguyen@xxxxxxxxxx>
---
drivers/mmc/host/dw_mmc.c | 6 ++++++
drivers/mmc/host/dw_mmc.h | 1 +
include/linux/mmc/dw_mmc.h | 3 +++
3 files changed, 10 insertions(+)
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 323c502..490490b 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -265,6 +265,9 @@ static u32 dw_mci_prepare_command(struct mmc_host *mmc, struct mmc_command *cmd)
if (drv_data && drv_data->prepare_command)
drv_data->prepare_command(slot->host, &cmdr);
+ if (slot->host->use_hold_reg)
+ cmdr |= SDMMC_CMD_USE_HOLD_REG;
+
return cmdr;
}
@@ -2183,6 +2186,9 @@ int dw_mci_probe(struct dw_mci *host)
host->data_shift = 2;
}
+ /* Get the USE_HOLD_REG */
+ host->use_hold_reg = mci_readl(host, CMD) & SDMMC_CMD_USE_HOLD_REG;
+
/* Reset all blocks */
if (!mci_wait_reset(host->dev, host))
return -ENODEV;
diff --git a/drivers/mmc/host/dw_mmc.h b/drivers/mmc/host/dw_mmc.h
index 53b8fd9..6172900 100644
--- a/drivers/mmc/host/dw_mmc.h
+++ b/drivers/mmc/host/dw_mmc.h
@@ -111,6 +111,7 @@
#define SDMMC_INT_ERROR 0xbfc2
/* Command register defines */
#define SDMMC_CMD_START BIT(31)
+#define SDMMC_CMD_USE_HOLD_REG BIT(29)
#define SDMMC_CMD_CCS_EXP BIT(23)
#define SDMMC_CMD_CEATA_RD BIT(22)
#define SDMMC_CMD_UPD_CLK BIT(21)
diff --git a/include/linux/mmc/dw_mmc.h b/include/linux/mmc/dw_mmc.h
index 34be4f4..36cab8a 100644
--- a/include/linux/mmc/dw_mmc.h
+++ b/include/linux/mmc/dw_mmc.h
@@ -187,6 +187,9 @@ struct dw_mci {
struct regulator *vmmc; /* Power regulator */
unsigned long irq_flags; /* IRQ flags */
int irq;
+
+ /* Set to one for SDR12 and SDR25 */
+ unsigned int use_hold_reg;
};
/* DMA ops for Internal/External DMAC interface */
--
1.7.9.5
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