Hi, Issue Description: SD/MMC card can't be recognized by O2 chip.
Root cause:
O2Micro's ADMA and related functions can't work by default Linux SD
driver. We need mark those related registers.
Patch description:
- SET MULTI 3 to VCC3V#
- Disable CLK_REQ# support after media DET.
- Choose programmable settings
- Enable SDMA
- Disable ADMA1
- Disable ADMA2
- Disable the infinite transfer mode
Linux Kernel version:
This patch was based on Linux Kernel version 2.6.32. It should be added
from Linux kernel 2.6.32 and the newer kernel versions.
Supplement:
We are trying to add the enable ADMA patch later.
PATCH content:
Pci_ids.h
--- ../untitled folder/linux-2.6.32/include/linux/pci_ids.h
2009-12-03 11:51:21.000000000 +0800
+++ ./pci_ids.h 2010-11-15 17:56:26.103132569 +0800
@@ -2694,3 +2694,14 @@
#define PCI_DEVICE_ID_RME_DIGI32 0x9896
#define PCI_DEVICE_ID_RME_DIGI32_PRO 0x9897
#define PCI_DEVICE_ID_RME_DIGI32_8 0x9898
+
+#define PCI_VENDOR_ID_O2 0x1217
+#define PCI_DEVICE_ID_O2_6729 0x6729
+#define PCI_DEVICE_ID_O2_6730 0x673a
+#define PCI_DEVICE_ID_O2_6832 0x6832
+#define PCI_DEVICE_ID_O2_6836 0x6836
+#define PCI_DEVICE_ID_O2_8120 0x8120
+#define PCI_DEVICE_ID_O2_8220 0x8220
+#define PCI_DEVICE_ID_O2_8320 0x8320
+#define PCI_DEVICE_ID_O2_8321 0x8321
+#define PCI_DEVICE_ID_O2_8221 0x8221
Sdhci-pci.c
--- linux-2.6.32/drivers/mmc/host/sdhci-pci.c 2009-12-03
11:51:21.000000000 +0800
+++ Q20101122sdhci-pci/sdhci-pci.c 2010-11-18 07:59:38.119873198
+0800
@@ -38,6 +38,14 @@
#define MAX_SLOTS 8
+#define O2_SDMMC_LOCK_WP 0xD3
+#define O2_SDMMC_MULTI_VCC3V 0xEE
+#define O2_SDMMC_CLKREQ 0xEC
+#define O2_SDMMC_CAPABILITIES 0xE0
+#define O2_SDMMC_ADMA1 0xE2
+#define O2_SDMMC_ADMA2 0xE7
+#define O2_SDMMC_INFINIT_MODE 0xF1
+
struct sdhci_pci_chip;
struct sdhci_pci_slot;
@@ -112,6 +120,78 @@ static const struct sdhci_pci_fixes sdhc
SDHCI_QUIRK_BROKEN_TIMEOUT_VAL,
};
+static int o2_probe(struct sdhci_pci_chip *chip)
+{
+ int ret;
+ u8 scratch;
+
+ if ((chip->pdev->device == PCI_DEVICE_ID_O2_8220) ||
+ (chip->pdev->device == PCI_DEVICE_ID_O2_8320) ||
+ (chip->pdev->device == PCI_DEVICE_ID_O2_8321) ||
+ (chip->pdev->device == PCI_DEVICE_ID_O2_8221))
+ {
+ /* O2Micro's ADMA and releated function can't work on
default Linux SD driver.
+ * We need mark those related registers.
+ * - SET MULTI 3 to VCC3V#
+ * - Disable CLK_REQ# support after media DET.
+ * - Choose programmable settings
+ * - Enable SDMA
+ * - Disable ADMA1
+ * - Disable ADMA2
+ * - Disable the infinit transfer mode
+ */
+ ret = pci_read_config_byte(chip->pdev, O2_SDMMC_LOCK_WP,
&scratch);
+ if (ret)
+ return ret;
+
+ scratch &= 0x7f;
+ ret = pci_write_config_byte(chip->pdev,
O2_SDMMC_LOCK_WP, scratch);
+
+ scratch = 0x08;
+ ret = pci_write_config_byte(chip->pdev,
O2_SDMMC_MULTI_VCC3V, scratch);
+
+
+ ret = pci_read_config_byte(chip->pdev, O2_SDMMC_CLKREQ,
&scratch);
+ if (ret)
+ return ret;
+
+ scratch |= 0x20;
+ ret = pci_write_config_byte(chip->pdev, O2_SDMMC_CLKREQ,
scratch);
+
+ ret = pci_read_config_byte(chip->pdev,
O2_SDMMC_CAPABILITIES, &scratch);
+ if (ret)
+ return ret;
+
+ scratch |= 0x01;
+ ret = pci_write_config_byte(chip->pdev,
O2_SDMMC_CAPABILITIES, scratch);
+
+ scratch = 0x73;
+ ret = pci_write_config_byte(chip->pdev,
O2_SDMMC_CAPABILITIES, scratch);
+
+ scratch = 0x39;
+ ret = pci_write_config_byte(chip->pdev, O2_SDMMC_ADMA1,
scratch);
+
+ scratch = 0x08;
+ ret = pci_write_config_byte(chip->pdev, O2_SDMMC_ADMA2,
scratch);
+
+ ret = pci_read_config_byte(chip->pdev,
O2_SDMMC_INFINIT_MODE, &scratch);
+ if (ret)
+ return ret;
+
+ scratch |= 0x08;
+ ret = pci_write_config_byte(chip->pdev,
O2_SDMMC_INFINIT_MODE, scratch);
+
+ ret = pci_read_config_byte(chip->pdev, O2_SDMMC_LOCK_WP,
&scratch);
+ if (ret)
+ return ret;
+
+ scratch |= 0x80;
+ ret = pci_write_config_byte(chip->pdev,
O2_SDMMC_LOCK_WP, scratch);
+
+ }
+ return 0;
+}
+
static int jmicron_pmos(struct sdhci_pci_chip *chip, int on)
{
u8 scratch;
@@ -275,6 +355,10 @@ static int jmicron_resume(struct sdhci_p
return 0;
}
+static const struct sdhci_pci_fixes sdhci_o2 = {
+ .probe = o2_probe,
+};
+
static const struct sdhci_pci_fixes sdhci_jmicron = {
.probe = jmicron_probe,
@@ -370,6 +454,46 @@ static const struct pci_device_id pci_id
.driver_data = (kernel_ulong_t)&sdhci_via,
},
+ {
+ .vendor = PCI_VENDOR_ID_O2,
+ .device = PCI_DEVICE_ID_O2_8120,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .driver_data = (kernel_ulong_t)&sdhci_o2,
+ },
+
+ {
+ .vendor = PCI_VENDOR_ID_O2,
+ .device = PCI_DEVICE_ID_O2_8220,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .driver_data = (kernel_ulong_t)&sdhci_o2,
+ },
+
+ {
+ .vendor = PCI_VENDOR_ID_O2,
+ .device = PCI_DEVICE_ID_O2_8320,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .driver_data = (kernel_ulong_t)&sdhci_o2,
+ },
+
+ {
+ .vendor = PCI_VENDOR_ID_O2,
+ .device = PCI_DEVICE_ID_O2_8221,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .driver_data = (kernel_ulong_t)&sdhci_o2,
+ },
+
+ {
+ .vendor = PCI_VENDOR_ID_O2,
+ .device = PCI_DEVICE_ID_O2_8321,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .driver_data = (kernel_ulong_t)&sdhci_o2,
+ },
+
{ /* Generic SD host controller */
PCI_DEVICE_CLASS((PCI_CLASS_SYSTEM_SDHCI << 8),
0xFFFF00)
},
Signed-off-by: Jennifer Li <jennifer...@o2micro.com>
Best regards,
Jennifer
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pci_ids_patch
Description: pci_ids_patch
sdhci-pci_patch
Description: sdhci-pci_patch
