diff options
| author | Joe Hershberger <joe.hershberger@ni.com> | 2012-08-17 10:18:55 +0000 |
|---|---|---|
| committer | Andy Fleming <afleming@freescale.com> | 2012-09-05 17:33:25 -0500 |
| commit | 470dcc7511431db4210a79ea4e6b14cf109a24dc (patch) | |
| tree | 44b636911e65911f781519fe7cb855ca2ba9084c | |
| parent | 073cfd1c040b9cce9289cacf4d4963460322dc2b (diff) | |
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.c | 17 | ||||
| -rw-r--r-- | include/sdhci.h | 7 |
2 files changed, 21 insertions, 3 deletions
diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c index b07dc0064e..3bb0ad0491 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 9d37183243..d41287f67b 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; |