On 12/07/16 10:46, Dong Aisheng wrote:
> Move all hw related static initializations into a separate function
> which helps concentrate the hw related initialization code.
> And that function could also be called by other places later as a
> basic hw state restore.
> e.g. suspend/resume where the hw state is possible to lost due to
> low power mode.
>
> Signed-off-by: Dong Aisheng <aisheng.dong@xxxxxxx>
Acked-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
> ---
> drivers/mmc/host/sdhci-esdhc-imx.c | 72 +++++++++++++++++++++-----------------
> 1 file changed, 40 insertions(+), 32 deletions(-)
>
> diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
> index bbb0bd4eac28..5a0e5dee977f 100644
> --- a/drivers/mmc/host/sdhci-esdhc-imx.c
> +++ b/drivers/mmc/host/sdhci-esdhc-imx.c
> @@ -979,6 +979,44 @@ static const struct sdhci_pltfm_data sdhci_esdhc_imx_pdata = {
> .ops = &sdhci_esdhc_ops,
> };
>
> +static void sdhci_esdhc_imx_hwinit(struct sdhci_host *host)
> +{
> + struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> + struct pltfm_imx_data *imx_data = sdhci_pltfm_priv(pltfm_host);
> +
> + if (esdhc_is_usdhc(imx_data)) {
> + /*
> + * The imx6q ROM code will change the default watermark
> + * level setting to something insane. Change it back here.
> + */
> + writel(ESDHC_WTMK_DEFAULT_VAL, host->ioaddr + ESDHC_WTMK_LVL);
> +
> + /*
> + * ROM code will change the bit burst_length_enable setting
> + * to zero if this usdhc is choosed to boot system. Change
> + * it back here, otherwise it will impact the performance a
> + * lot. This bit is used to enable/disable the burst length
> + * for the external AHB2AXI bridge, it's usefully especially
> + * for INCR transfer because without burst length indicator,
> + * the AHB2AXI bridge does not know the burst length in
> + * advance. And without burst length indicator, AHB INCR
> + * transfer can only be converted to singles on the AXI side.
> + */
> + writel(readl(host->ioaddr + SDHCI_HOST_CONTROL)
> + | ESDHC_BURST_LEN_EN_INCR,
> + host->ioaddr + SDHCI_HOST_CONTROL);
> + /*
> + * errata ESDHC_FLAG_ERR004536 fix for MX6Q TO1.2 and MX6DL
> + * TO1.1, it's harmless for MX6SL
> + */
> + writel(readl(host->ioaddr + 0x6c) | BIT(7),
> + host->ioaddr + 0x6c);
> +
> + /* disable DLL_CTRL delay line settings */
> + writel(0x0, host->ioaddr + ESDHC_DLL_CTRL);
> + }
> +}
> +
> #ifdef CONFIG_OF
> static int
> sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,
> @@ -1176,43 +1214,11 @@ static int sdhci_esdhc_imx_probe(struct platform_device *pdev)
> host->quirks |= SDHCI_QUIRK_NO_MULTIBLOCK
> | SDHCI_QUIRK_BROKEN_ADMA;
>
> - /*
> - * The imx6q ROM code will change the default watermark level setting
> - * to something insane. Change it back here.
> - */
> if (esdhc_is_usdhc(imx_data)) {
> - writel(ESDHC_WTMK_DEFAULT_VAL, host->ioaddr + ESDHC_WTMK_LVL);
> -
> host->quirks2 |= SDHCI_QUIRK2_PRESET_VALUE_BROKEN;
> host->mmc->caps |= MMC_CAP_1_8V_DDR;
> -
> - /*
> - * ROM code will change the bit burst_length_enable setting
> - * to zero if this usdhc is choosed to boot system. Change
> - * it back here, otherwise it will impact the performance a
> - * lot. This bit is used to enable/disable the burst length
> - * for the external AHB2AXI bridge, it's usefully especially
> - * for INCR transfer because without burst length indicator,
> - * the AHB2AXI bridge does not know the burst length in
> - * advance. And without burst length indicator, AHB INCR
> - * transfer can only be converted to singles on the AXI side.
> - */
> - writel(readl(host->ioaddr + SDHCI_HOST_CONTROL)
> - | ESDHC_BURST_LEN_EN_INCR,
> - host->ioaddr + SDHCI_HOST_CONTROL);
> -
> if (!(imx_data->socdata->flags & ESDHC_FLAG_HS200))
> host->quirks2 |= SDHCI_QUIRK2_BROKEN_HS200;
> -
> - /*
> - * errata ESDHC_FLAG_ERR004536 fix for MX6Q TO1.2 and MX6DL
> - * TO1.1, it's harmless for MX6SL
> - */
> - writel(readl(host->ioaddr + 0x6c) | BIT(7),
> - host->ioaddr + 0x6c);
> -
> - /* disable DLL_CTRL delay line settings */
> - writel(0x0, host->ioaddr + ESDHC_DLL_CTRL);
> }
>
> if (imx_data->socdata->flags & ESDHC_FLAG_MAN_TUNING)
> @@ -1237,6 +1243,8 @@ static int sdhci_esdhc_imx_probe(struct platform_device *pdev)
> if (err)
> goto disable_clk;
>
> + sdhci_esdhc_imx_hwinit(host);
> +
> err = sdhci_add_host(host);
> if (err)
> goto disable_clk;
>
--
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