Signed-off-by: Ziyuan Xu <xzy...@rock-chips.com>
---
drivers/mmc/dw_mmc.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c
index 700f764..baf2280 100644
--- a/drivers/mmc/dw_mmc.c
+++ b/drivers/mmc/dw_mmc.c
@@ -384,6 +384,26 @@ static int dwmci_setup_bus(struct dwmci_host *host, u32
freq)
}
#ifdef CONFIG_DM_MMC_OPS
+static bool dwmci_card_busy(struct udevice *dev)
+{
+ struct mmc *mmc = mmc_get_mmc_dev(dev);
+#else
+static bool dwmci_card_busy(struct mmc *mmc)
+{
+#endif
+ u32 status;
+ struct dwmci_host *host = (struct dwmci_host *)mmc->priv;
+
+ /*
+ * Check the busy bit which is low when DAT[3:0]
+ * (the data lines) are 0000
+ */
+ status = dwmci_readl(host, DWMCI_STATUS);
+
+ return !!(status & DWMCI_BUSY);
+}
+
+#ifdef CONFIG_DM_MMC_OPS
static int dwmci_set_ios(struct udevice *dev)
{
struct mmc *mmc = mmc_get_mmc_dev(dev);
@@ -475,12 +495,14 @@ int dwmci_probe(struct udevice *dev)
}
const struct dm_mmc_ops dm_dwmci_ops = {
+ .card_busy = dwmci_card_busy,
.send_cmd = dwmci_send_cmd,
.set_ios = dwmci_set_ios,
};
#else
static const struct mmc_ops dwmci_ops = {
+ .card_busy = dwmci_card_busy,
.send_cmd = dwmci_send_cmd,
.set_ios = dwmci_set_ios,
.init = dwmci_init,
--
2.7.4
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