summaryrefslogtreecommitdiff
path: root/drivers/mmc/host/sdhci-of-dwcmshc.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/mmc/host/sdhci-of-dwcmshc.c')
-rw-r--r--drivers/mmc/host/sdhci-of-dwcmshc.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci-of-dwcmshc.c b/drivers/mmc/host/sdhci-of-dwcmshc.c
index 4b673792b5a4..d90020ed3622 100644
--- a/drivers/mmc/host/sdhci-of-dwcmshc.c
+++ b/drivers/mmc/host/sdhci-of-dwcmshc.c
@@ -16,6 +16,8 @@
#include "sdhci-pltfm.h"
+#define SDHCI_DWCMSHC_ARG2_STUFF GENMASK(31, 16)
+
/* DWCMSHC specific Mode Select value */
#define DWCMSHC_CTRL_HS400 0x7
@@ -49,6 +51,29 @@ static void dwcmshc_adma_write_desc(struct sdhci_host *host, void **desc,
sdhci_adma_write_desc(host, desc, addr, len, cmd);
}
+static void dwcmshc_check_auto_cmd23(struct mmc_host *mmc,
+ struct mmc_request *mrq)
+{
+ struct sdhci_host *host = mmc_priv(mmc);
+
+ /*
+ * No matter V4 is enabled or not, ARGUMENT2 register is 32-bit
+ * block count register which doesn't support stuff bits of
+ * CMD23 argument on dwcmsch host controller.
+ */
+ if (mrq->sbc && (mrq->sbc->arg & SDHCI_DWCMSHC_ARG2_STUFF))
+ host->flags &= ~SDHCI_AUTO_CMD23;
+ else
+ host->flags |= SDHCI_AUTO_CMD23;
+}
+
+static void dwcmshc_request(struct mmc_host *mmc, struct mmc_request *mrq)
+{
+ dwcmshc_check_auto_cmd23(mmc, mrq);
+
+ sdhci_request(mmc, mrq);
+}
+
static void dwcmshc_set_uhs_signaling(struct sdhci_host *host,
unsigned int timing)
{
@@ -133,6 +158,8 @@ static int dwcmshc_probe(struct platform_device *pdev)
sdhci_get_of_property(pdev);
+ host->mmc_host_ops.request = dwcmshc_request;
+
err = sdhci_add_host(host);
if (err)
goto err_clk;