linux-kernel - Re: FW: Fwd: [PATCH v6 08/12] mmc: mmci: Add support to data commands via variant structure.

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Date:	Thu, 17 Jul 2014 17:43:38 +0530
From:	Prakash Burla <burlaprakash.linuxkernel@...il.com>
To:	srinivas.kandagatla@...aro.org
Cc:	linux@....linux.org.uk, ulf.hansson@...aro.org,
	linux-mmc@...r.kernel.org, chris@...ntf.net,
	linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
	linus.walleij@...aro.org
Subject: Re: FW: Fwd: [PATCH v6 08/12] mmc: mmci: Add support to data commands
 via variant structure.

tested-by: Prakash Burla <prakash.burla@...rtplayin.com
This driver is tested on IFC6410.

> From:  <srinivas.kandagatla@...aro.org>
> Date: Mon, Jun 2, 2014 at 2:39 PM
> Subject: [PATCH v6 08/12] mmc: mmci: Add support to data commands via
> variant structure.
> To: Russell King <linux@....linux.org.uk>, Ulf Hansson
> <ulf.hansson@...aro.org>, linux-mmc@...r.kernel.org
> Cc: Chris Ball <chris@...ntf.net>, linux-kernel@...r.kernel.org,
> linux-arm-msm@...r.kernel.org, linus.walleij@...aro.org, Srinivas
> Kandagatla <srinivas.kandagatla@...aro.org>
>
>
> From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
>
> On some SOCs like Qcom there are explicit bits in the command register
> to specify if its a data transfer command or not. So this patch adds
> support to such bits in variant data, giving more flexibility to the
> driver.
>
> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
> Reviewed-by: Linus Walleij <linus.walleij@...aro.org>
> ---
>  drivers/mmc/host/mmci.c | 5 +++++
>  1 file changed, 5 insertions(+)
>
> diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
> index 4c95a9b..8534c29 100644
> --- a/drivers/mmc/host/mmci.c
> +++ b/drivers/mmc/host/mmci.c
> @@ -59,6 +59,7 @@ static unsigned int fmax = 515633;
>   *           is asserted (likewise for RX)
>   * @fifohalfsize: number of bytes that can be written when MCI_TXFIFOHALFEMPTY
>   *               is asserted (likewise for RX)
> + * @data_cmd_enable: enable value for data commands.
>   * @sdio: variant supports SDIO
>   * @st_clkdiv: true if using a ST-specific clock divider algorithm
>   * @datactrl_mask_ddrmode: ddr mode mask in datactrl register.
> @@ -79,6 +80,7 @@ struct variant_data {
>         unsigned int            datalength_bits;
>         unsigned int            fifosize;
>         unsigned int            fifohalfsize;
> +       unsigned int            data_cmd_enable;
>         unsigned int            datactrl_mask_ddrmode;
>         bool                    sdio;
>         bool                    st_clkdiv;
> @@ -839,6 +841,9 @@ mmci_start_command(struct mmci_host *host, struct
> mmc_command *cmd, u32 c)
>         if (/*interrupt*/0)
>                 c |= MCI_CPSM_INTERRUPT;
>
> +       if (mmc_cmd_type(cmd) == MMC_CMD_ADTC)
> +               c |= host->variant->data_cmd_enable;
> +
>         host->cmd = cmd;
>
>         writel(cmd->arg, base + MMCIARGUMENT);
> --
> 1.9.1
>
> --
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