mmc: sdhci-pci: allow 8-bit bus width for Intel PCH

Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

1 files changed, 33 insertions, 0 deletions

diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
index bc666a4ed604..fbbebe251e01 100644
--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -29,6 +29,12 @@
 #include "sdhci.h"
 
 /*
+ * PCI device IDs
+ */
+#define PCI_DEVICE_ID_INTEL_PCH_SDIO0   0x8809
+#define PCI_DEVICE_ID_INTEL_PCH_SDIO1   0x880a
+
+/*
  * PCI registers
  */
 
@@ -174,6 +180,12 @@ static int mrst_hc_probe(struct sdhci_pci_chip *chip)
         return 0;
 }
 
+static int pch_hc_probe_slot(struct sdhci_pci_slot *slot)
+{
+        slot->host->mmc->caps |= MMC_CAP_8_BIT_DATA;
+        return 0;
+}
+
 #ifdef CONFIG_PM_RUNTIME
 
 static irqreturn_t sdhci_pci_sd_cd(int irq, void *dev_id)
@@ -285,6 +297,11 @@ static const struct sdhci_pci_fixes sdhci_intel_mfd_emmc = {
         .probe_slot     = mfd_emmc_probe_slot,
 };
 
+static const struct sdhci_pci_fixes sdhci_intel_pch_sdio = {
+        .quirks         = SDHCI_QUIRK_BROKEN_ADMA,
+        .probe_slot     = pch_hc_probe_slot,
+};
+
 /* O2Micro extra registers */
 #define O2_SD_LOCK_WP           0xD3
 #define O2_SD_MULTI_VCC3V       0xEE
@@ -821,6 +838,22 @@ static const struct pci_device_id pci_ids[] __devinitdata = {
         },
 
         {
+                .vendor         = PCI_VENDOR_ID_INTEL,
+                .device         = PCI_DEVICE_ID_INTEL_PCH_SDIO0,
+                .subvendor      = PCI_ANY_ID,
+                .subdevice      = PCI_ANY_ID,
+                .driver_data    = (kernel_ulong_t)&sdhci_intel_pch_sdio,
+        },
+
+        {
+                .vendor         = PCI_VENDOR_ID_INTEL,
+                .device         = PCI_DEVICE_ID_INTEL_PCH_SDIO1,
+                .subvendor      = PCI_ANY_ID,
+                .subdevice      = PCI_ANY_ID,
+                .driver_data    = (kernel_ulong_t)&sdhci_intel_pch_sdio,
+        },
+
+        {
                 .vendor         = PCI_VENDOR_ID_O2,
                 .device         = PCI_DEVICE_ID_O2_8120,
                 .subvendor      = PCI_ANY_ID,