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authorVincent Wan <vincent.wan@amd.com>2015-06-11 14:11:47 +0200
committerUlf Hansson <ulf.hansson@linaro.org>2015-06-16 08:58:35 +0200
commitb5e97d6e58617b9d6a3838ede6ccd3883035dbf3 (patch)
tree47791ac78516114dffa0059235e92d0d105e5ac4 /drivers/mmc
parenti2c-piix4: Use Macro for AMD CZ SMBus device ID (diff)
downloadlinux-b5e97d6e58617b9d6a3838ede6ccd3883035dbf3.tar.xz
linux-b5e97d6e58617b9d6a3838ede6ccd3883035dbf3.zip
mmc: sdhci-pci: Change AMD SDHCI quirk application scope
Change this quirk to apply to AMD Carrizo platform. Signed-off-by: Wan ZongShun <Vincent.Wan@amd.com> Tested-by: Nath, Arindam <Arindam.Nath@amd.com> Tested-by: Ramesh, Ramya <Ramya.Ramesh@amd.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/sdhci-pci.c25
1 files changed, 24 insertions, 1 deletions
diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
index f208f2072d0c..94f54d2772e8 100644
--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -724,14 +724,37 @@ static const struct sdhci_pci_fixes sdhci_rtsx = {
.probe_slot = rtsx_probe_slot,
};
+/*AMD chipset generation*/
+enum amd_chipset_gen {
+ AMD_CHIPSET_BEFORE_ML,
+ AMD_CHIPSET_CZ,
+ AMD_CHIPSET_NL,
+ AMD_CHIPSET_UNKNOWN,
+};
+
static int amd_probe(struct sdhci_pci_chip *chip)
{
struct pci_dev *smbus_dev;
+ enum amd_chipset_gen gen;
smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD,
PCI_DEVICE_ID_AMD_HUDSON2_SMBUS, NULL);
+ if (smbus_dev) {
+ gen = AMD_CHIPSET_BEFORE_ML;
+ } else {
+ smbus_dev = pci_get_device(PCI_VENDOR_ID_AMD,
+ PCI_DEVICE_ID_AMD_KERNCZ_SMBUS, NULL);
+ if (smbus_dev) {
+ if (smbus_dev->revision < 0x51)
+ gen = AMD_CHIPSET_CZ;
+ else
+ gen = AMD_CHIPSET_NL;
+ } else {
+ gen = AMD_CHIPSET_UNKNOWN;
+ }
+ }
- if (smbus_dev && (smbus_dev->revision < 0x51)) {
+ if ((gen == AMD_CHIPSET_BEFORE_ML) || (gen == AMD_CHIPSET_CZ)) {
chip->quirks2 |= SDHCI_QUIRK2_CLEAR_TRANSFERMODE_REG_BEFORE_CMD;
chip->quirks2 |= SDHCI_QUIRK2_BROKEN_HS200;
}