linux-kernel - Re: [PATCH v2 09/21] mmc: sunxi: add support for A100 mmc controller

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Date:   Mon, 11 Jan 2021 19:06:17 +0100
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Andre Przywara <andre.przywara@....com>
Cc:     Maxime Ripard <mripard@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        Icenowy Zheng <icenowy@...c.xyz>,
        Linus Walleij <linus.walleij@...aro.org>,
        Rob Herring <robh@...nel.org>,
        Clément Péron <peron.clem@...il.com>,
        Shuosheng Huang <huangshuosheng@...winnertech.com>,
        Yangtao Li <tiny.windzz@...il.com>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-sunxi <linux-sunxi@...glegroups.com>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>
Subject: Re: [PATCH v2 09/21] mmc: sunxi: add support for A100 mmc controller

On Fri, 11 Dec 2020 at 02:20, Andre Przywara <andre.przywara@....com> wrote:
>
> From: Yangtao Li <frank@...winnertech.com>
>
> This patch adds support for A100 MMC controller, which use word address
> for internal dma.
>
> Signed-off-by: Yangtao Li <frank@...winnertech.com>
> Signed-off-by: Andre Przywara <andre.przywara@....com>

Applied for next to my mmc tree, thanks!

Kind regards
Uffe


> ---
>  drivers/mmc/host/sunxi-mmc.c | 28 +++++++++++++++++++++++++---
>  1 file changed, 25 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/mmc/host/sunxi-mmc.c b/drivers/mmc/host/sunxi-mmc.c
> index fc62773602ec..1518b64112b7 100644
> --- a/drivers/mmc/host/sunxi-mmc.c
> +++ b/drivers/mmc/host/sunxi-mmc.c
> @@ -244,6 +244,7 @@ struct sunxi_idma_des {
>
>  struct sunxi_mmc_cfg {
>         u32 idma_des_size_bits;
> +       u32 idma_des_shift;
>         const struct sunxi_mmc_clk_delay *clk_delays;
>
>         /* does the IP block support autocalibration? */
> @@ -343,7 +344,7 @@ static int sunxi_mmc_init_host(struct sunxi_mmc_host *host)
>         /* Enable CEATA support */
>         mmc_writel(host, REG_FUNS, SDXC_CEATA_ON);
>         /* Set DMA descriptor list base address */
> -       mmc_writel(host, REG_DLBA, host->sg_dma);
> +       mmc_writel(host, REG_DLBA, host->sg_dma >> host->cfg->idma_des_shift);
>
>         rval = mmc_readl(host, REG_GCTRL);
>         rval |= SDXC_INTERRUPT_ENABLE_BIT;
> @@ -373,8 +374,10 @@ static void sunxi_mmc_init_idma_des(struct sunxi_mmc_host *host,
>
>                 next_desc += sizeof(struct sunxi_idma_des);
>                 pdes[i].buf_addr_ptr1 =
> -                       cpu_to_le32(sg_dma_address(&data->sg[i]));
> -               pdes[i].buf_addr_ptr2 = cpu_to_le32((u32)next_desc);
> +                       cpu_to_le32(sg_dma_address(&data->sg[i]) >>
> +                                   host->cfg->idma_des_shift);
> +               pdes[i].buf_addr_ptr2 = cpu_to_le32((u32)next_desc >>
> +                                                   host->cfg->idma_des_shift);
>         }
>
>         pdes[0].config |= cpu_to_le32(SDXC_IDMAC_DES0_FD);
> @@ -1178,6 +1181,23 @@ static const struct sunxi_mmc_cfg sun50i_a64_emmc_cfg = {
>         .needs_new_timings = true,
>  };
>
> +static const struct sunxi_mmc_cfg sun50i_a100_cfg = {
> +       .idma_des_size_bits = 16,
> +       .idma_des_shift = 2,
> +       .clk_delays = NULL,
> +       .can_calibrate = true,
> +       .mask_data0 = true,
> +       .needs_new_timings = true,
> +};
> +
> +static const struct sunxi_mmc_cfg sun50i_a100_emmc_cfg = {
> +       .idma_des_size_bits = 13,
> +       .idma_des_shift = 2,
> +       .clk_delays = NULL,
> +       .can_calibrate = true,
> +       .needs_new_timings = true,
> +};
> +
>  static const struct of_device_id sunxi_mmc_of_match[] = {
>         { .compatible = "allwinner,sun4i-a10-mmc", .data = &sun4i_a10_cfg },
>         { .compatible = "allwinner,sun5i-a13-mmc", .data = &sun5i_a13_cfg },
> @@ -1186,6 +1206,8 @@ static const struct of_device_id sunxi_mmc_of_match[] = {
>         { .compatible = "allwinner,sun9i-a80-mmc", .data = &sun9i_a80_cfg },
>         { .compatible = "allwinner,sun50i-a64-mmc", .data = &sun50i_a64_cfg },
>         { .compatible = "allwinner,sun50i-a64-emmc", .data = &sun50i_a64_emmc_cfg },
> +       { .compatible = "allwinner,sun50i-a100-mmc", .data = &sun50i_a100_cfg },
> +       { .compatible = "allwinner,sun50i-a100-emmc", .data = &sun50i_a100_emmc_cfg },
>         { /* sentinel */ }
>  };
>  MODULE_DEVICE_TABLE(of, sunxi_mmc_of_match);
> --
> 2.17.5
>