Re: [PATCH RESEND 1/3] mmc: sdhi: Add r8a7795 support

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On 15 February 2016 at 16:01, Wolfram Sang <wsa@xxxxxxxxxxxxx> wrote:
> From: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
>
> Registers are 64bit apart, so we refactor bus_shift handling a little and set
> it based on the DT compatible. Also, EXT_ACC is different. It has been tested
> on a Salvator-X (Gen3) and, to check for regressions, on a Lager (Gen2).
>
> Signed-off-by: Ai Kyuse <ai.kyuse.uw@xxxxxxxxxxx>
> Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>

Thanks, applied for next!

Kind regards
Uffe

> ---
>  Documentation/devicetree/bindings/mmc/tmio_mmc.txt |  1 +
>  drivers/mmc/host/Kconfig                           |  2 +-
>  drivers/mmc/host/sh_mobile_sdhi.c                  | 47 ++++++++++++++++------
>  3 files changed, 36 insertions(+), 14 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/mmc/tmio_mmc.txt b/Documentation/devicetree/bindings/mmc/tmio_mmc.txt
> index 400b640fabc768..7fb746dd1a68ca 100644
> --- a/Documentation/devicetree/bindings/mmc/tmio_mmc.txt
> +++ b/Documentation/devicetree/bindings/mmc/tmio_mmc.txt
> @@ -22,6 +22,7 @@ Required properties:
>                 "renesas,sdhi-r8a7792" - SDHI IP on R8A7792 SoC
>                 "renesas,sdhi-r8a7793" - SDHI IP on R8A7793 SoC
>                 "renesas,sdhi-r8a7794" - SDHI IP on R8A7794 SoC
> +               "renesas,sdhi-r8a7795" - SDHI IP on R8A7795 SoC
>
>  Optional properties:
>  - toshiba,mmc-wrprotect-disable: write-protect detection is unavailable
> diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
> index 4a35ebf5165d83..d9a9d92fa8379a 100644
> --- a/drivers/mmc/host/Kconfig
> +++ b/drivers/mmc/host/Kconfig
> @@ -560,7 +560,7 @@ config MMC_TMIO
>
>  config MMC_SDHI
>         tristate "SH-Mobile SDHI SD/SDIO controller support"
> -       depends on SUPERH || ARM
> +       depends on SUPERH || ARM || ARM64
>         depends on SUPERH || ARCH_SHMOBILE || COMPILE_TEST
>         select MMC_TMIO_CORE
>         help
> diff --git a/drivers/mmc/host/sh_mobile_sdhi.c b/drivers/mmc/host/sh_mobile_sdhi.c
> index 557e2b9dadeec7..9aa147959276d0 100644
> --- a/drivers/mmc/host/sh_mobile_sdhi.c
> +++ b/drivers/mmc/host/sh_mobile_sdhi.c
> @@ -1,6 +1,8 @@
>  /*
>   * SuperH Mobile SDHI
>   *
> + * Copyright (C) 2016 Sang Engineering, Wolfram Sang
> + * Copyright (C) 2015-16 Renesas Electronics Corporation
>   * Copyright (C) 2009 Magnus Damm
>   *
>   * This program is free software; you can redistribute it and/or modify
> @@ -43,6 +45,7 @@ struct sh_mobile_sdhi_of_data {
>         unsigned long capabilities2;
>         enum dma_slave_buswidth dma_buswidth;
>         dma_addr_t dma_rx_offset;
> +       unsigned bus_shift;
>  };
>
>  static const struct sh_mobile_sdhi_of_data sh_mobile_sdhi_of_cfg[] = {
> @@ -65,6 +68,13 @@ static const struct sh_mobile_sdhi_of_data of_rcar_gen2_compatible = {
>         .dma_rx_offset  = 0x2000,
>  };
>
> +static const struct sh_mobile_sdhi_of_data of_rcar_gen3_compatible = {
> +       .tmio_flags     = TMIO_MMC_HAS_IDLE_WAIT | TMIO_MMC_WRPROTECT_DISABLE |
> +                         TMIO_MMC_CLK_ACTUAL | TMIO_MMC_FAST_CLK_CHG,
> +       .capabilities   = MMC_CAP_SD_HIGHSPEED,
> +       .bus_shift      = 2,
> +};
> +
>  static const struct of_device_id sh_mobile_sdhi_of_match[] = {
>         { .compatible = "renesas,sdhi-shmobile" },
>         { .compatible = "renesas,sdhi-sh7372" },
> @@ -78,6 +88,7 @@ static const struct of_device_id sh_mobile_sdhi_of_match[] = {
>         { .compatible = "renesas,sdhi-r8a7792", .data = &of_rcar_gen2_compatible, },
>         { .compatible = "renesas,sdhi-r8a7793", .data = &of_rcar_gen2_compatible, },
>         { .compatible = "renesas,sdhi-r8a7794", .data = &of_rcar_gen2_compatible, },
> +       { .compatible = "renesas,sdhi-r8a7795", .data = &of_rcar_gen3_compatible, },
>         {},
>  };
>  MODULE_DEVICE_TABLE(of, sh_mobile_sdhi_of_match);
> @@ -103,6 +114,15 @@ static void sh_mobile_sdhi_sdbuf_width(struct tmio_mmc_host *host, int width)
>         case 0xCB0D:
>                 val = (width == 32) ? 0x0000 : 0x0001;
>                 break;
> +       case 0xCC10: /* Gen3, SD only */
> +       case 0xCD10: /* Gen3, SD + MMC */
> +               if (width == 64)
> +                       val = 0x0000;
> +               else if (width == 32)
> +                       val = 0x0101;
> +               else
> +                       val = 0x0001;
> +               break;
>         default:
>                 /* nothing to do */
>                 return;
> @@ -233,16 +253,26 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
>                 goto eprobe;
>         }
>
> +       if (of_id && of_id->data) {
> +               const struct sh_mobile_sdhi_of_data *of_data = of_id->data;
> +
> +               mmc_data->flags |= of_data->tmio_flags;
> +               mmc_data->capabilities |= of_data->capabilities;
> +               mmc_data->capabilities2 |= of_data->capabilities2;
> +               mmc_data->dma_rx_offset = of_data->dma_rx_offset;
> +               dma_priv->dma_buswidth = of_data->dma_buswidth;
> +               host->bus_shift = of_data->bus_shift;
> +       }
> +
>         host->dma               = dma_priv;
>         host->write16_hook      = sh_mobile_sdhi_write16_hook;
>         host->clk_enable        = sh_mobile_sdhi_clk_enable;
>         host->clk_disable       = sh_mobile_sdhi_clk_disable;
>         host->multi_io_quirk    = sh_mobile_sdhi_multi_io_quirk;
> -       /* SD control register space size is 0x100, 0x200 for bus_shift=1 */
> -       if (resource_size(res) > 0x100)
> +
> +       /* Orginally registers were 16 bit apart, could be 32 or 64 nowadays */
> +       if (!host->bus_shift && resource_size(res) > 0x100) /* old way to determine the shift */
>                 host->bus_shift = 1;
> -       else
> -               host->bus_shift = 0;
>
>         if (mmd)
>                 *mmc_data = *mmd;
> @@ -274,15 +304,6 @@ static int sh_mobile_sdhi_probe(struct platform_device *pdev)
>          */
>         mmc_data->flags |= TMIO_MMC_SDIO_STATUS_QUIRK;
>
> -       if (of_id && of_id->data) {
> -               const struct sh_mobile_sdhi_of_data *of_data = of_id->data;
> -               mmc_data->flags |= of_data->tmio_flags;
> -               mmc_data->capabilities |= of_data->capabilities;
> -               mmc_data->capabilities2 |= of_data->capabilities2;
> -               mmc_data->dma_rx_offset = of_data->dma_rx_offset;
> -               dma_priv->dma_buswidth = of_data->dma_buswidth;
> -       }
> -
>         ret = tmio_mmc_host_probe(host, mmc_data);
>         if (ret < 0)
>                 goto efree;
> --
> 2.1.4
>



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