2020-11-25 11:06:17

by Ben Chuang

Subject: [PATCH,v2] mmc: sdhci-pci-gli: Disable slow mode in HS400 mode for GL9763E

From: Ben Chuang <[email protected]>

The GL9763E uses 150Mhz (slow mode) by default in HS400 mode. In order
to make HS400 mode run at 200Mhz, the slow mode needs to be turned off.

Signed-off-by: Ben Chuang <[email protected]>
---
drivers/mmc/host/sdhci-pci-gli.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c
index 9887485a4134..d45d7e529150 100644
--- a/drivers/mmc/host/sdhci-pci-gli.c
+++ b/drivers/mmc/host/sdhci-pci-gli.c
@@ -87,6 +87,9 @@
#define PCIE_GLI_9763E_SCR 0x8E0
#define GLI_9763E_SCR_AXI_REQ BIT(9)

+#define PCIE_GLI_9763E_MMC_CTRL 0x960
+#define GLI_9763E_HS400_SLOW BIT(3)
+
#define SDHCI_GLI_9763E_CQE_BASE_ADDR 0x200
#define GLI_9763E_CQE_TRNS_MODE (SDHCI_TRNS_MULTI | \
SDHCI_TRNS_BLK_CNT_EN | \
@@ -764,6 +767,10 @@ static void gli_set_gl9763e(struct sdhci_pci_slot *slot)
value |= GLI_9763E_SCR_AXI_REQ;
pci_write_config_dword(pdev, PCIE_GLI_9763E_SCR, value);

+ pci_read_config_dword(pdev, PCIE_GLI_9763E_MMC_CTRL, &value);
+ value &= ~GLI_9763E_HS400_SLOW;
+ pci_write_config_dword(pdev, PCIE_GLI_9763E_MMC_CTRL, 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);
--
2.29.2

2020-12-04 14:42:04

by Ulf Hansson

Subject: Re: [PATCH,v2] mmc: sdhci-pci-gli: Disable slow mode in HS400 mode for GL9763E

On Wed, 25 Nov 2020 at 12:01, Ben Chuang <[email protected]> wrote:
>
> From: Ben Chuang <[email protected]>
>
> The GL9763E uses 150Mhz (slow mode) by default in HS400 mode. In order
> to make HS400 mode run at 200Mhz, the slow mode needs to be turned off.
>
> Signed-off-by: Ben Chuang <[email protected]>

Applied for next, thanks!

Kind regards
Uffe


> ---
> drivers/mmc/host/sdhci-pci-gli.c | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c
> index 9887485a4134..d45d7e529150 100644
> --- a/drivers/mmc/host/sdhci-pci-gli.c
> +++ b/drivers/mmc/host/sdhci-pci-gli.c
> @@ -87,6 +87,9 @@
> #define PCIE_GLI_9763E_SCR 0x8E0
> #define GLI_9763E_SCR_AXI_REQ BIT(9)
>
> +#define PCIE_GLI_9763E_MMC_CTRL 0x960
> +#define GLI_9763E_HS400_SLOW BIT(3)
> +
> #define SDHCI_GLI_9763E_CQE_BASE_ADDR 0x200
> #define GLI_9763E_CQE_TRNS_MODE (SDHCI_TRNS_MULTI | \
> SDHCI_TRNS_BLK_CNT_EN | \
> @@ -764,6 +767,10 @@ static void gli_set_gl9763e(struct sdhci_pci_slot *slot)
> value |= GLI_9763E_SCR_AXI_REQ;
> pci_write_config_dword(pdev, PCIE_GLI_9763E_SCR, value);
>
> + pci_read_config_dword(pdev, PCIE_GLI_9763E_MMC_CTRL, &value);
> + value &= ~GLI_9763E_HS400_SLOW;
> + pci_write_config_dword(pdev, PCIE_GLI_9763E_MMC_CTRL, 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);
> --
> 2.29.2
>