On 7/01/19 12:11 PM, BOUGH CHEN wrote:
> Add an new esdhc_soc_data for i.MX8QXP, and add HS400_ES mode
> support.
>
> Signed-off-by: Haibo Chen <haibo.chen@xxxxxxx>
Acked-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
> ---
> drivers/mmc/host/sdhci-esdhc-imx.c | 29 +++++++++++++++++++++++++++++
> 1 file changed, 29 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
> index 0489b60b8eb4..08bba97706d0 100644
> --- a/drivers/mmc/host/sdhci-esdhc-imx.c
> +++ b/drivers/mmc/host/sdhci-esdhc-imx.c
> @@ -52,6 +52,7 @@
> #define ESDHC_MIX_CTRL_AUTO_TUNE_EN (1 << 24)
> #define ESDHC_MIX_CTRL_FBCLK_SEL (1 << 25)
> #define ESDHC_MIX_CTRL_HS400_EN (1 << 26)
> +#define ESDHC_MIX_CTRL_HS400_ES_EN (1 << 27)
> /* Bits 3 and 6 are not SDHCI standard definitions */
> #define ESDHC_MIX_CTRL_SDHCI_MASK 0xb7
> /* Tuning bits */
> @@ -140,6 +141,8 @@
> #define ESDHC_FLAG_HS200 BIT(8)
> /* The IP supports HS400 mode */
> #define ESDHC_FLAG_HS400 BIT(9)
> +/* The IP supports HS400ES mode */
> +#define ESDHC_FLAG_HS400_ES BIT(10)
>
> struct esdhc_soc_data {
> u32 flags;
> @@ -182,6 +185,12 @@ static struct esdhc_soc_data usdhc_imx7d_data = {
> | ESDHC_FLAG_HS400,
> };
>
> +static struct esdhc_soc_data usdhc_imx8qxp_data = {
> + .flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING
> + | ESDHC_FLAG_HAVE_CAP1 | ESDHC_FLAG_HS200
> + | ESDHC_FLAG_HS400 | ESDHC_FLAG_HS400_ES,
> +};
> +
> struct pltfm_imx_data {
> u32 scratchpad;
> struct pinctrl *pinctrl;
> @@ -227,6 +236,7 @@ static const struct of_device_id imx_esdhc_dt_ids[] = {
> { .compatible = "fsl,imx6sl-usdhc", .data = &usdhc_imx6sl_data, },
> { .compatible = "fsl,imx6q-usdhc", .data = &usdhc_imx6q_data, },
> { .compatible = "fsl,imx7d-usdhc", .data = &usdhc_imx7d_data, },
> + { .compatible = "fsl,imx8qxp-usdhc", .data = &usdhc_imx8qxp_data, },
> { /* sentinel */ }
> };
> MODULE_DEVICE_TABLE(of, imx_esdhc_dt_ids);
> @@ -863,6 +873,19 @@ static int esdhc_executing_tuning(struct sdhci_host *host, u32 opcode)
> return ret;
> }
>
> +static void esdhc_hs400_enhanced_strobe(struct mmc_host *mmc, struct mmc_ios *ios)
> +{
> + struct sdhci_host *host = mmc_priv(mmc);
> + u32 m;
> +
> + m = readl(host->ioaddr + ESDHC_MIX_CTRL);
> + if (ios->enhanced_strobe)
> + m |= ESDHC_MIX_CTRL_HS400_ES_EN;
> + else
> + m &= ~ESDHC_MIX_CTRL_HS400_ES_EN;
> + writel(m, host->ioaddr + ESDHC_MIX_CTRL);
> +}
> +
> static int esdhc_change_pinstate(struct sdhci_host *host,
> unsigned int uhs)
> {
> @@ -1334,6 +1357,12 @@ static int sdhci_esdhc_imx_probe(struct platform_device *pdev)
> if (imx_data->socdata->flags & ESDHC_FLAG_HS400)
> host->quirks2 |= SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400;
>
> + if (imx_data->socdata->flags & ESDHC_FLAG_HS400_ES) {
> + host->mmc->caps2 |= MMC_CAP2_HS400_ES;
> + host->mmc_host_ops.hs400_enhanced_strobe =
> + esdhc_hs400_enhanced_strobe;
> + }
> +
> if (of_id)
> err = sdhci_esdhc_imx_probe_dt(pdev, host, imx_data);
> else
>
