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

[Ziyuan Xu]

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.

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 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);
+}
+
+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);
-- 
2.7.4