From: Jerry Huang <chang-ming.hu...@freescale.com>
For Fsl eSDHC controller, the bit DCR[DMA__AHB2MAG_IRQ_BYPASS] cannot be
set automatically, when SoC reset, therefore, we need to set this bit manually.
Signed-off-by: Gao Guanhua <b22...@freescale.com>
Signed-off-by: Jerry Huang <chang-ming.hu...@freescale.com>
---
drivers/mmc/host/sdhci-esdhc.h | 1 +
drivers/mmc/host/sdhci-of-esdhc.c | 7 +++++++
drivers/mmc/host/sdhci-pltfm.c | 3 +++
drivers/mmc/host/sdhci.c | 4 ++++
drivers/mmc/host/sdhci.h | 1 +
include/linux/mmc/sdhci.h | 2 ++
6 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/host/sdhci-esdhc.h b/drivers/mmc/host/sdhci-esdhc.h
index c3b08f1..7cbaffe 100644
--- a/drivers/mmc/host/sdhci-esdhc.h
+++ b/drivers/mmc/host/sdhci-esdhc.h
@@ -39,6 +39,7 @@
/* OF-specific */
#define ESDHC_DMA_SYSCTL 0x40c
#define ESDHC_DMA_SNOOP 0x00000040
+#define ESDHC_AHB2MAG_IRQ_BYPASS 0x20
#define ESDHC_HOST_CONTROL_RES 0x05
diff --git a/drivers/mmc/host/sdhci-of-esdhc.c
b/drivers/mmc/host/sdhci-of-esdhc.c
index 7d5ae82..413ded5 100644
--- a/drivers/mmc/host/sdhci-of-esdhc.c
+++ b/drivers/mmc/host/sdhci-of-esdhc.c
@@ -68,6 +68,12 @@ static int esdhc_of_enable_dma(struct sdhci_host *host)
return 0;
}
+static int esdhc_of_enable_irq_bypass(struct sdhci_host *host)
+{
+ setbits32(host->ioaddr + ESDHC_DMA_SYSCTL, ESDHC_AHB2MAG_IRQ_BYPASS);
+ return 0;
+}
+
static unsigned int esdhc_of_get_max_clock(struct sdhci_host *host)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
@@ -116,6 +122,7 @@ static struct sdhci_ops sdhci_esdhc_ops = {
.get_max_clock = esdhc_of_get_max_clock,
.get_min_clock = esdhc_of_get_min_clock,
.get_cd = esdhc_of_get_cd,
+ .enable_irq_bypass = esdhc_of_enable_irq_bypass,
};
static struct sdhci_pltfm_data sdhci_esdhc_pdata = {
diff --git a/drivers/mmc/host/sdhci-pltfm.c b/drivers/mmc/host/sdhci-pltfm.c
index 2a77435..de182c6 100644
--- a/drivers/mmc/host/sdhci-pltfm.c
+++ b/drivers/mmc/host/sdhci-pltfm.c
@@ -74,6 +74,9 @@ void sdhci_get_of_property(struct platform_device *pdev)
if (of_get_property(np, "sdhci,dma-broken", NULL))
host->quirks |= SDHCI_QUIRK_BROKEN_DMA;
+ if (of_get_property(np, "sdhci,ahb2mag-irq-bypass", NULL))
+ host->quirks2 |= SDHCI_QUIRK2_SET_AHB2MAG_IRQ_BYPASS;
+
clk = of_get_property(np, "clock-frequency", &size);
if (clk && size == sizeof(*clk) && *clk)
pltfm_host->clock = be32_to_cpup(clk);
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index fbe2f46..ae52ab9 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -226,6 +226,10 @@ static void sdhci_init(struct sdhci_host *host, int soft)
else
sdhci_reset(host, SDHCI_RESET_ALL);
+ if (host->quirks2 & SDHCI_QUIRK2_SET_AHB2MAG_IRQ_BYPASS)
+ if (host->ops->enable_irq_bypass)
+ host->ops->enable_irq_bypass(host);
+
sdhci_clear_set_irqs(host, SDHCI_INT_ALL_MASK,
SDHCI_INT_BUS_POWER | SDHCI_INT_DATA_END_BIT |
SDHCI_INT_DATA_CRC | SDHCI_INT_DATA_TIMEOUT | SDHCI_INT_INDEX |
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index 82f4d27..1326557 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -263,6 +263,7 @@ struct sdhci_ops {
void (*set_clock)(struct sdhci_host *host, unsigned int clock);
int (*get_cd)(struct sdhci_host *host);
+ int (*enable_irq_bypass)(struct sdhci_host *host);
int (*enable_dma)(struct sdhci_host *host);
unsigned int (*get_max_clock)(struct sdhci_host *host);
unsigned int (*get_min_clock)(struct sdhci_host *host);
diff --git a/include/linux/mmc/sdhci.h b/include/linux/mmc/sdhci.h
index e4b6935..1dbe22b 100644
--- a/include/linux/mmc/sdhci.h
+++ b/include/linux/mmc/sdhci.h
@@ -91,6 +91,8 @@ struct sdhci_host {
unsigned int quirks2; /* More deviations from spec. */
#define SDHCI_QUIRK2_OWN_CARD_DETECTION (1<<0)
+/* Controller cannot set DCR[DMA__AHB2MAG_IRQ_BYPASS] automatically */
+#define SDHCI_QUIRK2_SET_AHB2MAG_IRQ_BYPASS (1<<1)
int irq; /* Device IRQ */
void __iomem *ioaddr; /* Mapped address */
--
1.7.5.4
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