On 3 September 2014 04:09, Kuninori Morimoto
<kuninori.morimoto...@gmail.com> wrote:
> From: Kuninori Morimoto <kuninori.morimoto...@renesas.com>
>
> Now, omap_hsmmc can use .multi_io_quirk callback
> instead of MMC_CAP2_NO_MULTI_READ flags.
> let's use it.
>
> Signed-off-by: Kuninori Morimoto <kuninori.morimoto...@renesas.com>
> ---
> v2 -> v3
>
> - blk_size_workaround -> multi_io_quirk
>
> drivers/mmc/host/omap_hsmmc.c | 17 ++++++++++++++++-
> 1 file changed, 16 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
> index ece1634..7b41f57 100644
> --- a/drivers/mmc/host/omap_hsmmc.c
> +++ b/drivers/mmc/host/omap_hsmmc.c
> @@ -219,6 +219,7 @@ struct omap_hsmmc_host {
> #define AUTO_CMD23 (1 << 0) /* Auto CMD23 support */
> #define HSMMC_SDIO_IRQ_ENABLED (1 << 1) /* SDIO irq enabled */
> #define HSMMC_WAKE_IRQ_ENABLED (1 << 2)
> +#define HSMMC_NO_MULTI_READ (1 << 3)
> struct omap_hsmmc_next next_data;
> struct omap_mmc_platform_data *pdata;
> };
> @@ -1829,6 +1830,19 @@ static int omap_hsmmc_disable_fclk(struct mmc_host
> *mmc)
> return 0;
> }
>
> +static int *omap_hsmmc_multi_io_quirk(struct mmc_card *card,
> + unsigned int direction, int blk_size)
> +{
> + struct omap_hsmmc_host *host = mmc_priv(card->host);
> +
> + /* This controller can't do multiblock reads due to hw bugs */
> + if ((host->flags & HSMMC_NO_MULTI_READ) &&
> + (direction == MMC_DATA_READ))
> + return 1;
> +
> + return blk_size;
> +}
> +
> static const struct mmc_host_ops omap_hsmmc_ops = {
> .enable = omap_hsmmc_enable_fclk,
> .disable = omap_hsmmc_disable_fclk,
> @@ -1840,6 +1854,7 @@ static const struct mmc_host_ops omap_hsmmc_ops = {
> .get_ro = omap_hsmmc_get_ro,
> .init_card = omap_hsmmc_init_card,
> .enable_sdio_irq = omap_hsmmc_enable_sdio_irq,
> + .multi_io_quirk = omap_hsmmc_multi_io_quirk,
> };
>
> #ifdef CONFIG_DEBUG_FS
> @@ -2101,7 +2116,7 @@ static int omap_hsmmc_probe(struct platform_device
> *pdev)
>
> if (host->pdata->controller_flags &
> OMAP_HSMMC_BROKEN_MULTIBLOCK_READ) {
> dev_info(&pdev->dev, "multiblock reads disabled due to 35xx
> erratum 2.1.1.128; MMC read performance may suffer\n");
> - mmc->caps2 |= MMC_CAP2_NO_MULTI_READ;
An option to adding yet another flag, would be to assign
->multi_io_quirk = omap_hsmmc_multi_io_quirk() here? Isn't that
actually better for those variants that doesn't suffer from this HW
bug?
Kind regards
Uffe
> + host->flags |= HSMMC_NO_MULTI_READ;
> }
>
> pm_runtime_enable(host->dev);
> --
> 1.7.9.5
>
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