[PATCH v2] mmc:sdhci-pci: Add Support of O2Mirco/BayHubTech SD Host

From: Peter Guo
Date: Wed Oct 16 2013 - 03:26:32 EST

Add O2Micro/BayHubTech SD Host DeviceId 8520 support and specified Init.
Apply SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12 for SD Host Controller.
Apply SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC for SD Host Controller.

Signed-off-by: peter.guo <peter.guo@xxxxxxxxxxxxxx>
---
drivers/mmc/host/sdhci-pci.c | 208 ++++++++++++++++++++++++++++++++++++++++++
1 file changed, 208 insertions(+)

diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
index d7d6bc8..b0611f0 100644
--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -364,11 +364,155 @@ static const struct sdhci_pci_fixes sdhci_intel_byt_sd = {
#define O2_SD_ADMA1 0xE2
#define O2_SD_ADMA2 0xE7
#define O2_SD_INF_MOD 0xF1
+#define O2_SD_PLL_SETTING 0x304
+#define O2_SD_CLK_SETTING 0x328
+#define O2_SD_UHS1_CAP_SETTING 0x33C
+#define O2_SD_VENDOR_SETTING 0x110
+
+#define PCI_DEVICE_ID_FUJIN2 0x8520
+
+static void o2_host_pci_init(struct sdhci_pci_chip *chip)
+{
+ u32 scratch_32;
+ int ret;
+ /* Improve write performance for SD3.0 */
+ ret = pci_read_config_dword(chip->pdev, 0x88, &scratch_32);
+ if (ret)
+ return;
+ scratch_32 &= ~((1 << 12) | (1 << 13) | (1 << 14));
+ pci_write_config_dword(chip->pdev, 0x88, scratch_32);
+
+
+ /* Enable Link abnormal reset generating Reset */
+ ret = pci_read_config_dword(chip->pdev, 0x64, &scratch_32);
+ if (ret)
+ return;
+ scratch_32 &= ~((1 << 19) | (1 << 11));
+ scratch_32 |= (1 << 10);
+ pci_write_config_dword(chip->pdev, 0x64, scratch_32);
+
+ /* set card power over current protection */
+ ret = pci_read_config_dword(chip->pdev, 0xd4, &scratch_32);
+ if (ret)
+ return;
+ scratch_32 |= (1 << 4);
+ pci_write_config_dword(chip->pdev, 0xd4, scratch_32);
+
+ /* Set timeout CLK */
+ ret = pci_read_config_dword(chip->pdev,
+ O2_SD_CLK_SETTING, &scratch_32);
+ if (ret)
+ return;
+ scratch_32 &= ~(0xFF00);
+ scratch_32 |= 0x07E0C800;
+ pci_write_config_dword(chip->pdev,
+ O2_SD_CLK_SETTING, scratch_32);
+
+ /* adjust the output delay for SD mode */
+ pci_write_config_dword(chip->pdev, 0x350, 0x00002492);
+
+ /* Set the output voltage setting of Aux 1.2v LDO */
+ ret = pci_read_config_dword(chip->pdev,
+ 0x68, &scratch_32);
+ if (ret)
+ return;
+ scratch_32 &= ~(3 << 12);
+ pci_write_config_dword(chip->pdev,
+ 0x68, scratch_32);
+
+ /* Set Max power supply capability of SD host */
+ ret = pci_read_config_dword(chip->pdev,
+ 0x334, &scratch_32);
+ if (ret)
+ return;
+ scratch_32 &= ~(0x01FE);
+ scratch_32 |= 0x00CC;
+ pci_write_config_dword(chip->pdev,
+ 0x334, scratch_32);
+ /* Set DLL Tuning Window */
+ ret = pci_read_config_dword(chip->pdev,
+ 0x300, &scratch_32);
+ if (ret)
+ return;
+ scratch_32 &= ~(0x000000FF);
+ scratch_32 |= 0x00000066;
+ pci_write_config_dword(chip->pdev,
+ 0x300, scratch_32);
+
+ /* Set UHS2 T_EIDLE */
+ ret = pci_read_config_dword(chip->pdev,
+ 0x35C, &scratch_32);
+ if (ret)
+ return;
+ scratch_32 &= ~(0x000000FC);
+ scratch_32 |= 0x00000084;
+ pci_write_config_dword(chip->pdev,
+ 0x35C, scratch_32);
+
+ /* Set UHS2 Termination */
+ ret = pci_read_config_dword(chip->pdev,
+ 0x3E0, &scratch_32);
+ if (ret)
+ return;
+ scratch_32 &= ~((1 << 21) | (1 << 30));
+
+ /* Set RTD3 function disabled */
+ scratch_32 |= ((1 << 29) | (1 << 28));
+ pci_write_config_dword(chip->pdev,
+ 0x3E0, scratch_32);
+
+ /* Set L1 Entrance Timer */
+ ret = pci_read_config_dword(chip->pdev,
+ O2_SD_CAPS, &scratch_32);
+ if (ret)
+ return;
+ scratch_32 &= ~(0xf0000000);
+ scratch_32 |= 0x30000000;
+ pci_write_config_dword(chip->pdev,
+ O2_SD_CAPS, scratch_32);
+
+ ret = pci_read_config_dword(chip->pdev,
+ 0xfc, &scratch_32);
+ if (ret)
+ return;
+ scratch_32 &= ~(0x000f0000);
+ scratch_32 |= 0x00080000;
+ pci_write_config_dword(chip->pdev,
+ 0xfc, scratch_32);
+}
+
+static int o2_probe_slot(struct sdhci_pci_slot *slot)
+{
+ struct sdhci_pci_chip *chip;
+ struct sdhci_host *host;
+ u32 reg;
+
+ chip = slot->chip;
+ host = slot->host;
+ switch (chip->pdev->device) {
+ case PCI_DEVICE_ID_FUJIN2:
+ reg = sdhci_readl(host, O2_SD_VENDOR_SETTING);
+ if (reg & 0x1)
+ host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12;
+
+ /* set dll watch dog timer */
+ reg = sdhci_readl(host, 0x1C8);
+ reg |= (1 << 12);
+ sdhci_writel(host, reg, 0x1C8);
+
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}

static int o2_probe(struct sdhci_pci_chip *chip)
{
int ret;
u8 scratch;
+ u32 scratch_32;

switch (chip->pdev->device) {
case PCI_DEVICE_ID_O2_8220:
@@ -419,6 +563,52 @@ static int o2_probe(struct sdhci_pci_chip *chip)
return ret;
scratch |= 0x80;
pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
+ break;
+
+ case PCI_DEVICE_ID_FUJIN2:
+ /* UnLock WP */
+ ret = pci_read_config_byte(chip->pdev, O2_SD_LOCK_WP, &scratch);
+ if (ret)
+ return ret;
+ scratch &= 0x7f;
+ pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
+
+ ret = pci_read_config_dword(chip->pdev,
+ O2_SD_PLL_SETTING, &scratch_32);
+ if (ret)
+ return ret;
+ scratch_32 &= ~(0x1F3F070E);
+ scratch_32 |= 0x18270106;
+ pci_write_config_dword(chip->pdev,
+ O2_SD_PLL_SETTING, scratch_32);
+
+ o2_host_pci_init(chip);
+
+
+ /* Disable ADMA1/ADMA2/ADMA3*/
+ ret = pci_read_config_dword(chip->pdev, 0x330, &scratch_32);
+ if (ret)
+ return ret;
+ scratch_32 &= ~(0xE6);
+ pci_write_config_dword(chip->pdev, 0x330, scratch_32);
+
+ ret = pci_read_config_dword(chip->pdev,
+ O2_SD_CLKREQ, &scratch_32);
+ if (ret)
+ return ret;
+ scratch_32 |= 0x3;
+ pci_write_config_dword(chip->pdev, O2_SD_CLKREQ, scratch_32);
+
+
+ /* Lock WP */
+ ret = pci_read_config_byte(chip->pdev,
+ O2_SD_LOCK_WP, &scratch);
+ if (ret)
+ return ret;
+ scratch |= 0x80;
+ pci_write_config_byte(chip->pdev, O2_SD_LOCK_WP, scratch);
+
+ break;
}

return 0;
@@ -613,8 +803,18 @@ static int jmicron_resume(struct sdhci_pci_chip *chip)
return 0;
}

+static int o2_resume(struct sdhci_pci_chip *chip)
+{
+ o2_probe(chip);
+ return 0;
+}
+
+
static const struct sdhci_pci_fixes sdhci_o2 = {
.probe = o2_probe,
+ .quirks = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
+ .probe_slot = o2_probe_slot,
+ .resume = o2_resume,
};

static const struct sdhci_pci_fixes sdhci_jmicron = {
@@ -979,6 +1179,14 @@ static const struct pci_device_id pci_ids[] = {
.driver_data = (kernel_ulong_t)&sdhci_o2,
},

+ {
+ .vendor = PCI_VENDOR_ID_O2,
+ .device = PCI_DEVICE_ID_FUJIN2,
+ .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)
},
--
1.7.9.5

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