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>

1 files changed, 27 insertions, 0 deletions

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 56de4c48ec80..dd4bfb594479 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);
 }