diff options
| author | Renius Chen <reniuschengl@gmail.com> | 2021-01-11 16:22:49 +0800 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2021-02-01 11:54:46 +0100 |
| commit | c58c5950b87a5ba8270c15a86b4261800e4079c1 (patch) | |
| tree | ca6c93df41e6ecb9dc74310a7f07db6267bc0096 /drivers/mmc | |
| parent | ffd68f356e411f79d5d448908a1f60e374c95cb2 (diff) | |
| download | linux-c58c5950b87a5ba8270c15a86b4261800e4079c1.tar.bz2 | |
mmc: sdhci-pci-gli: Finetune HS400 RX delay for GL9763E
To improve the compatibility of GL9763E with HS400 eMMC cards,
finetune the RX delay of HS400 mode.
Signed-off-by: Renius Chen <reniuschengl@gmail.com>
Link: https://lore.kernel.org/r/20210111082249.17092-1-reniuschengl@gmail.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/sdhci-pci-gli.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c index fb14f70cb9a0..4a0f69b97a78 100644 --- a/drivers/mmc/host/sdhci-pci-gli.c +++ b/drivers/mmc/host/sdhci-pci-gli.c @@ -95,6 +95,10 @@ #define PCIE_GLI_9763E_MMC_CTRL 0x960 #define GLI_9763E_HS400_SLOW BIT(3) +#define PCIE_GLI_9763E_CLKRXDLY 0x934 +#define GLI_9763E_HS400_RXDLY GENMASK(31, 28) +#define GLI_9763E_HS400_RXDLY_5 0x5 + #define SDHCI_GLI_9763E_CQE_BASE_ADDR 0x200 #define GLI_9763E_CQE_TRNS_MODE (SDHCI_TRNS_MULTI | \ SDHCI_TRNS_BLK_CNT_EN | \ @@ -802,6 +806,11 @@ static void gli_set_gl9763e(struct sdhci_pci_slot *slot) value |= FIELD_PREP(GLI_9763E_CFG2_L1DLY, GLI_9763E_CFG2_L1DLY_MAX); pci_write_config_dword(pdev, PCIE_GLI_9763E_CFG2, value); + pci_read_config_dword(pdev, PCIE_GLI_9763E_CLKRXDLY, &value); + value &= ~GLI_9763E_HS400_RXDLY; + value |= FIELD_PREP(GLI_9763E_HS400_RXDLY, GLI_9763E_HS400_RXDLY_5); + pci_write_config_dword(pdev, PCIE_GLI_9763E_CLKRXDLY, value); + pci_read_config_dword(pdev, PCIE_GLI_9763E_VHS, &value); value &= ~GLI_9763E_VHS_REV; value |= FIELD_PREP(GLI_9763E_VHS_REV, GLI_9763E_VHS_REV_R); |