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authorLeandro Dorileo <dorileo@ossystems.com.br>2007-07-25 23:47:04 +0200
committerPierre Ossman <drzeus@drzeus.cx>2007-07-26 01:53:09 +0200
commitb8352260d28b30cb2bb2df99814fb9c360e38901 (patch)
tree008c36650fc15a3a7e0d3b6e5930f05b2b40fb42 /drivers
parent43b58b36b7e6554b8a96be6b9f63542c583c06e5 (diff)
sdhci: add support to ENE-CB714
Added its pci_id and implemented a quirk for it because this controller needs to reset cmd and data when setting ios. Signed-off-by: Leandro Dorileo <dorileo@ossystems.com.br> Signed-off-by: Otavio Salvador <otavio@ossystems.com.br> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mmc/host/sdhci.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 56de4c48ec8..dd4bfb59447 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -34,6 +34,7 @@ static unsigned int debug_quirks = 0;
/* Controller doesn't like some resets when there is no card inserted. */
#define SDHCI_QUIRK_NO_CARD_NO_RESET (1<<2)
#define SDHCI_QUIRK_SINGLE_POWER_WRITE (1<<3)
+#define SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS (1<<4)
static const struct pci_device_id pci_ids[] __devinitdata = {
{
@@ -78,6 +79,24 @@ static const struct pci_device_id pci_ids[] __devinitdata = {
.driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE,
},
+ {
+ .vendor = PCI_VENDOR_ID_ENE,
+ .device = PCI_DEVICE_ID_ENE_CB714_SD,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE |
+ SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS,
+ },
+
+ {
+ .vendor = PCI_VENDOR_ID_ENE,
+ .device = PCI_DEVICE_ID_ENE_CB714_SD_2,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE |
+ SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS,
+ },
+
{ /* Generic SD host controller */
PCI_DEVICE_CLASS((PCI_CLASS_SYSTEM_SDHCI << 8), 0xFFFF00)
},
@@ -759,6 +778,14 @@ static void sdhci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
writeb(ctrl, host->ioaddr + SDHCI_HOST_CONTROL);
+ /*
+ * Some (ENE) controllers go apeshit on some ios operation,
+ * signalling timeout and CRC errors even on CMD0. Resetting
+ * it on each ios seems to solve the problem.
+ */
+ if(host->chip->quirks & SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS)
+ sdhci_reset(host, SDHCI_RESET_CMD | SDHCI_RESET_DATA);
+
mmiowb();
spin_unlock_irqrestore(&host->lock, flags);
}