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authoryangbo lu <yangbo.lu@nxp.com>2017-08-15 10:17:03 +0800
committerUlf Hansson <ulf.hansson@linaro.org>2017-08-30 15:03:36 +0200
commit2f3110cc89c29a790c8b31c7983603d60b9ede49 (patch)
tree808f654d49f64a5a0d1a45675d34668d9613e29e /drivers/mmc
parent501639bf2173ec142c48e67d391833a54965c912 (diff)
mmc: sdhci-of-esdhc: support ESDHC_CAPABILITIES_1 accessing
eSDHC is not a standard SD host controller. SDHCI_CAPABILITIES_1 register address is 0x44 while it's 0x114 (ESDHC_CAPABILITIES_1) for eSDHC. Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com> Acked-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/sdhci-esdhc.h3
-rw-r--r--drivers/mmc/host/sdhci-of-esdhc.c23
2 files changed, 24 insertions, 2 deletions
diff --git a/drivers/mmc/host/sdhci-esdhc.h b/drivers/mmc/host/sdhci-esdhc.h
index e7893f21b65e..dfa58f8b8dfa 100644
--- a/drivers/mmc/host/sdhci-esdhc.h
+++ b/drivers/mmc/host/sdhci-esdhc.h
@@ -54,6 +54,9 @@
#define ESDHC_CLOCK_HCKEN 0x00000002
#define ESDHC_CLOCK_IPGEN 0x00000001
+/* Host Controller Capabilities Register 2 */
+#define ESDHC_CAPABILITIES_1 0x114
+
/* Tuning Block Control Register */
#define ESDHC_TBCTL 0x120
#define ESDHC_TB_EN 0x00000004
diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c
index 44b016baa585..d96a057a7db8 100644
--- a/drivers/mmc/host/sdhci-of-esdhc.c
+++ b/drivers/mmc/host/sdhci-of-esdhc.c
@@ -86,6 +86,17 @@ static u32 esdhc_readl_fixup(struct sdhci_host *host,
return ret;
}
+ /*
+ * DTS properties of mmc host are used to enable each speed mode
+ * according to soc and board capability. So clean up
+ * SDR50/SDR104/DDR50 support bits here.
+ */
+ if (spec_reg == SDHCI_CAPABILITIES_1) {
+ ret = value & ~(SDHCI_SUPPORT_SDR50 | SDHCI_SUPPORT_SDR104 |
+ SDHCI_SUPPORT_DDR50);
+ return ret;
+ }
+
ret = value;
return ret;
}
@@ -249,7 +260,11 @@ static u32 esdhc_be_readl(struct sdhci_host *host, int reg)
u32 ret;
u32 value;
- value = ioread32be(host->ioaddr + reg);
+ if (reg == SDHCI_CAPABILITIES_1)
+ value = ioread32be(host->ioaddr + ESDHC_CAPABILITIES_1);
+ else
+ value = ioread32be(host->ioaddr + reg);
+
ret = esdhc_readl_fixup(host, reg, value);
return ret;
@@ -260,7 +275,11 @@ static u32 esdhc_le_readl(struct sdhci_host *host, int reg)
u32 ret;
u32 value;
- value = ioread32(host->ioaddr + reg);
+ if (reg == SDHCI_CAPABILITIES_1)
+ value = ioread32(host->ioaddr + ESDHC_CAPABILITIES_1);
+ else
+ value = ioread32(host->ioaddr + reg);
+
ret = esdhc_readl_fixup(host, reg, value);
return ret;