For version 4.10 and aboves, SDHCI_ARGUMENT2 is also used to indicate
32-bit number of blocks, so it doesn't support stuff bits in argument
of CMD23, but only block count for the following command (CMD18/25).
Signed-off-by: Chunyan Zhang <zhang.chunyan@xxxxxxxxxx>
---
drivers/mmc/host/sdhci.c | 10 ++++++++++
drivers/mmc/host/sdhci.h | 1 +
2 files changed, 11 insertions(+)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index b3328ee..04e0904 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1729,6 +1729,16 @@ static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
}
}
+ /*
+ * From version 4.10 onward, ARGUMENT2 register is also used as 32-bit
+ * block count register which doesn't support stuff bits of
+ * CMD23 argument.
+ */
+ if (host->version >= SDHCI_SPEC_410 &&
+ mrq->sbc && (mrq->sbc->arg & SDHCI_ARG2_STUFF) &&
+ (host->flags & SDHCI_AUTO_CMD23))
+ host->flags &= ~SDHCI_AUTO_CMD23;
+
if (!present || host->flags & SDHCI_DEVICE_DEAD) {
mrq->cmd->error = -ENOMEDIUM;
sdhci_finish_mrq(host, mrq);
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index d34971ac..daf8c1e 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -28,6 +28,7 @@
#define SDHCI_DMA_ADDRESS 0x00
#define SDHCI_ARGUMENT2 SDHCI_DMA_ADDRESS
+#define SDHCI_ARG2_STUFF GENMASK(31, 16)
#define SDHCI_32BIT_BLK_CNT SDHCI_DMA_ADDRESS
#define SDHCI_BLOCK_SIZE 0x04
--
2.7.4
