[U-Boot] [PATCH 06/33] mmc: add card_busy to query card status

[Jaehoon Chung]

On 05/15/2017 03:07 PM, Ziyuan Xu wrote:
> Card devices get into busy status since host request speed mode
> switch, if host controller is able to query whether the device is busy,
> try it instead of sending cmd13.

This patch is similar to one of Jean-Jacques's patches.

> 
> Signed-off-by: Ziyuan Xu <xzy.xu at rock-chips.com>
> ---
> 
>  drivers/mmc/mmc-uclass.c | 16 ++++++++++++++++
>  drivers/mmc/mmc.c        | 13 +++++++++++++
>  include/mmc.h            | 11 +++++++++++
>  3 files changed, 40 insertions(+)
> 
> diff --git a/drivers/mmc/mmc-uclass.c b/drivers/mmc/mmc-uclass.c
> index 9c07871..a300a6d 100644
> --- a/drivers/mmc/mmc-uclass.c
> +++ b/drivers/mmc/mmc-uclass.c
> @@ -38,6 +38,22 @@ int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
>  	return dm_mmc_send_cmd(mmc->dev, cmd, data);
>  }
>  
> +bool mmc_card_busy(struct mmc *mmc)
> +{
> +	struct dm_mmc_ops *ops = mmc_get_ops(mmc->dev);
> +
> +	if (!ops->card_busy)
> +		return -ENOSYS;

return is ENOSYS but this function is return bool type..fix it.

> +	return ops->card_busy(mmc->dev);
> +}
> +
> +bool mmc_can_card_busy(struct mmc *mmc)
> +{
> +	struct dm_mmc_ops *ops = mmc_get_ops(mmc->dev);
> +
> +	return !!ops->card_busy;
> +}
> +
>  int dm_mmc_set_ios(struct udevice *dev)
>  {
>  	struct dm_mmc_ops *ops = mmc_get_ops(dev);
> diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
> index 0b30172..13d8f04 100644
> --- a/drivers/mmc/mmc.c
> +++ b/drivers/mmc/mmc.c
> @@ -1156,6 +1156,19 @@ static void mmc_set_ios(struct mmc *mmc)
>  	if (mmc->cfg->ops->set_ios)
>  		mmc->cfg->ops->set_ios(mmc);
>  }
> +
> +static bool mmc_card_busy(struct mmc *mmc)
> +{
> +	if (!mmc->cfg->ops->card_busy)
> +		return -ENOSYS;
> +
> +	return mmc->cfg->ops->card_busy(mmc);

ditto.

> +}
> +
> +static bool mmc_can_card_busy(struct mmc *)
> +{
> +	return !!mmc->cfg->ops->card_busy;
> +}
>  #endif
>  
>  void mmc_set_clock(struct mmc *mmc, uint clock)
> diff --git a/include/mmc.h b/include/mmc.h
> index 060c1f8..9bed935 100644
> --- a/include/mmc.h
> +++ b/include/mmc.h
> @@ -357,6 +357,14 @@ struct dm_mmc_ops {
>  			struct mmc_data *data);
>  
>  	/**
> +	 * card_busy() - Query the card device status
> +	 *
> +	 * @dev:	Device to update
> +	 * @return true if card device is busy
> +	 */
> +	bool (*card_busy)(struct udevice *dev);
> +
> +	/**
>  	 * set_ios() - Set the I/O speed/width for an MMC device
>  	 *
>  	 * @dev:	Device to update
> @@ -390,12 +398,15 @@ int dm_mmc_get_cd(struct udevice *dev);
>  int dm_mmc_get_wp(struct udevice *dev);
>  
>  /* Transition functions for compatibility */
> +bool mmc_card_busy(struct mmc *mmc);
> +bool mmc_can_card_busy(struct mmc *mmc);
>  int mmc_set_ios(struct mmc *mmc);
>  int mmc_getcd(struct mmc *mmc);
>  int mmc_getwp(struct mmc *mmc);
>  
>  #else
>  struct mmc_ops {
> +	bool (*card_busy)(struct mmc *mmc);
>  	int (*send_cmd)(struct mmc *mmc,
>  			struct mmc_cmd *cmd, struct mmc_data *data);
>  	int (*set_ios)(struct mmc *mmc);
>