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authorJoe Hershberger <joe.hershberger@ni.com>2012-08-17 10:18:55 +0000
committerAndy Fleming <afleming@freescale.com>2012-09-05 17:33:25 -0500
commit470dcc7511431db4210a79ea4e6b14cf109a24dc (patch)
tree44b636911e65911f781519fe7cb855ca2ba9084c
parent073cfd1c040b9cce9289cacf4d4963460322dc2b (diff)
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mmc: Add a SDHCI quirk for boards that have no CD
Some boards have no Card Detect wired. In that case, set the CD test bits in the standard interface. Signed-off-by: Joe Hershberger <joe.hershberger@ni.com> Signed-off-by: Andy Fleming <afleming@freescale.com>
-rw-r--r--drivers/mmc/sdhci.c17
-rw-r--r--include/sdhci.h7
2 files changed, 21 insertions, 3 deletions
diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index b07dc00..3bb0ad0 100644
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -381,12 +381,25 @@ int sdhci_init(struct mmc *mmc)
}
}
+ sdhci_set_power(host, fls(mmc->voltages) - 1);
+
+ if (host->quirks & SDHCI_QUIRK_NO_CD) {
+ unsigned int status;
+
+ sdhci_writel(host, SDHCI_CTRL_CD_TEST_INS | SDHCI_CTRL_CD_TEST,
+ SDHCI_HOST_CONTROL);
+
+ status = sdhci_readl(host, SDHCI_PRESENT_STATE);
+ while ((!(status & SDHCI_CARD_PRESENT)) ||
+ (!(status & SDHCI_CARD_STATE_STABLE)) ||
+ (!(status & SDHCI_CARD_DETECT_PIN_LEVEL)))
+ status = sdhci_readl(host, SDHCI_PRESENT_STATE);
+ }
+
/* Eable all state */
sdhci_writel(host, SDHCI_INT_ALL_MASK, SDHCI_INT_ENABLE);
sdhci_writel(host, SDHCI_INT_ALL_MASK, SDHCI_SIGNAL_ENABLE);
- sdhci_set_power(host, fls(mmc->voltages) - 1);
-
return 0;
}
diff --git a/include/sdhci.h b/include/sdhci.h
index 9d37183..d41287f 100644
--- a/include/sdhci.h
+++ b/include/sdhci.h
@@ -76,6 +76,8 @@
#define SDHCI_SPACE_AVAILABLE 0x00000400
#define SDHCI_DATA_AVAILABLE 0x00000800
#define SDHCI_CARD_PRESENT 0x00010000
+#define SDHCI_CARD_STATE_STABLE 0x00020000
+#define SDHCI_CARD_DETECT_PIN_LEVEL 0x00040000
#define SDHCI_WRITE_PROTECT 0x00080000
#define SDHCI_HOST_CONTROL 0x28
@@ -87,7 +89,9 @@
#define SDHCI_CTRL_ADMA1 0x08
#define SDHCI_CTRL_ADMA32 0x10
#define SDHCI_CTRL_ADMA64 0x18
-#define SDHCI_CTRL_8BITBUS 0x20
+#define SDHCI_CTRL_8BITBUS 0x20
+#define SDHCI_CTRL_CD_TEST_INS 0x40
+#define SDHCI_CTRL_CD_TEST 0x80
#define SDHCI_POWER_CONTROL 0x29
#define SDHCI_POWER_ON 0x01
@@ -219,6 +223,7 @@
#define SDHCI_QUIRK_BROKEN_R1B (1 << 2)
#define SDHCI_QUIRK_NO_HISPD_BIT (1 << 3)
#define SDHCI_QUIRK_BROKEN_VOLTAGE (1 << 4)
+#define SDHCI_QUIRK_NO_CD (1 << 5)
/* to make gcc happy */
struct sdhci_host;