[PATCH 2/2] mmc: dw_mmc: wait until card ready if tuning fails

[Ulf Hansson]

On 26 January 2015 at 12:19, Addy Ke <addy.ke at rock-chips.com> wrote:
> This patch based on Alex's patch:
> https://patchwork.kernel.org/patch/5516411/

This above patch was rejected, since it doesn't use mmc_send_tuning().
Please base you work on my latest next branch.

If you need other patches which has been posted recently, which hasn’t
been reviewed nor merged you can just included them in your patchset
as well.

Kind regards
Uffe

>
> Signed-off-by: Addy Ke <addy.ke at rock-chips.com>
> ---
>  drivers/mmc/core/mmc_ops.h |  1 -
>  drivers/mmc/host/dw_mmc.c  | 48 ++++++++++++++++++++++++++++++++++++++++------
>  include/linux/mmc/card.h   |  2 ++
>  3 files changed, 44 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/mmc/core/mmc_ops.h b/drivers/mmc/core/mmc_ops.h
> index 6f4b00e..c5be9ce 100644
> --- a/drivers/mmc/core/mmc_ops.h
> +++ b/drivers/mmc/core/mmc_ops.h
> @@ -20,7 +20,6 @@ int mmc_send_op_cond(struct mmc_host *host, u32 ocr, u32 *rocr);
>  int mmc_all_send_cid(struct mmc_host *host, u32 *cid);
>  int mmc_set_relative_addr(struct mmc_card *card);
>  int mmc_send_csd(struct mmc_card *card, u32 *csd);
> -int mmc_send_status(struct mmc_card *card, u32 *status);
>  int mmc_send_cid(struct mmc_host *host, u32 *cid);
>  int mmc_spi_read_ocr(struct mmc_host *host, int highcap, u32 *ocrp);
>  int mmc_spi_set_crc(struct mmc_host *host, int use_crc);
> diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
> index e54e656..4a31a5e 100644
> --- a/drivers/mmc/host/dw_mmc.c
> +++ b/drivers/mmc/host/dw_mmc.c
> @@ -1317,10 +1317,38 @@ static void dw_mci_enable_sdio_irq(struct mmc_host *mmc, int enb)
>         spin_unlock_irqrestore(&host->irq_lock, irqflags);
>  }
>
> -static int dw_mci_tuning_test(struct dw_mci_slot *slot, u32 opcode,
> -                              struct dw_mci_tuning_data *tuning_data,
> -                              u8 *blk_test)
> +static int dw_mci_card_busy(u32 status)
>  {
> +       return !(status & R1_READY_FOR_DATA) ||
> +               (R1_CURRENT_STATE(status) == R1_STATE_PRG);
> +}
> +
> +static int dw_mci_wait_for_card_ready(struct mmc_card *card)
> +{
> +       struct mmc_host *mmc = card->host;
> +       struct dw_mci_slot *slot = mmc_priv(mmc);
> +       struct dw_mci *host = slot->host;
> +       int err = 0;
> +       u32 status;
> +
> +       do {
> +               err = mmc_send_status(card, &status);
> +               if (err) {
> +                       dev_err(host->dev,
> +                               "Get card status fail in tuning state\n");
> +                       break;
> +               }
> +       } while (dw_mci_card_busy(status));
> +
> +       return err;
> +}
> +
> +static int dw_mci_tuning_test(struct mmc_card *card, u32 opcode,
> +                             struct dw_mci_tuning_data *tuning_data,
> +                             u8 *blk_test)
> +{
> +       struct mmc_host *mmc = card->host;
> +       struct dw_mci_slot *slot = mmc_priv(mmc);
>         struct dw_mci *host = slot->host;
>         struct mmc_host *mmc = slot->mmc;
>         const u8 *blk_pattern = tuning_data->blk_pattern;
> @@ -1330,6 +1358,7 @@ static int dw_mci_tuning_test(struct dw_mci_slot *slot, u32 opcode,
>         struct mmc_command stop = {0};
>         struct mmc_data data = {0};
>         struct scatterlist sg;
> +       int err;
>
>         memset(blk_test, 0, blksz);
>
> @@ -1365,6 +1394,11 @@ static int dw_mci_tuning_test(struct dw_mci_slot *slot, u32 opcode,
>                 dev_dbg(host->dev,
>                         "Tuning error: cmd.error:%d, data.error:%d\n",
>                         cmd.error, data.error);
> +
> +               err = dw_mci_wait_for_card_ready(card);
> +               if (err)
> +                       return err;
> +
>                 if (cmd.error)
>                         return cmd.error;
>                 else
> @@ -1372,9 +1406,11 @@ static int dw_mci_tuning_test(struct dw_mci_slot *slot, u32 opcode,
>         }
>  }
>
> -static int dw_mci_execute_generic_tuning(struct dw_mci_slot *slot, u32 opcode,
> +static int dw_mci_execute_generic_tuning(struct mmc_card *card, u32 opcode,
>                                          struct dw_mci_tuning_data *tuning_data)
>  {
> +       struct mmc_host *mmc = card->host;
> +       struct dw_mci_slot *slot = mmc_priv(mmc);
>         struct dw_mci *host = slot->host;
>         unsigned int blksz = tuning_data->blksz;
>         u8 *blk_test;
> @@ -1412,7 +1448,7 @@ static int dw_mci_execute_generic_tuning(struct dw_mci_slot *slot, u32 opcode,
>         for (i = 0; i < NUM_PHASES; i++) {
>                 clk_set_phase(host->sample_clk, i * PHASE_INCREMENT);
>
> -               v = !dw_mci_tuning_test(slot, opcode, tuning_data, blk_test);
> +               v = !dw_mci_tuning_test(card, opcode, tuning_data, blk_test);
>
>                 if ((!prev_v) && v) {
>                         range_count++;
> @@ -1496,7 +1532,7 @@ static int dw_mci_execute_tuning(struct mmc_card *card, u32 opcode)
>         if (drv_data && drv_data->execute_tuning)
>                 err = drv_data->execute_tuning(slot, opcode, &tuning_data);
>         else
> -               err = dw_mci_execute_generic_tuning(slot, opcode, &tuning_data);
> +               err = dw_mci_execute_generic_tuning(card, opcode, &tuning_data);
>         return err;
>  }
>
> diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
> index 4d69c00..40d90ae 100644
> --- a/include/linux/mmc/card.h
> +++ b/include/linux/mmc/card.h
> @@ -518,4 +518,6 @@ extern void mmc_unregister_driver(struct device_driver *);
>  extern void mmc_fixup_device(struct mmc_card *card,
>                              const struct mmc_fixup *table);
>
> +int mmc_send_status(struct mmc_card *card, u32 *status);
> +
>  #endif /* LINUX_MMC_CARD_H */
> --
> 1.8.3.2
>
>
> --
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