Per dw_mmc databook, it's recommend that reset the host contoller if
some data-related error occurre during tuning progress.
Signed-off-by: Ziyuan Xu <xzy...@rock-chips.com>
---
drivers/mmc/dw_mmc.c | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c
index c05288c..e862eb2 100644
--- a/drivers/mmc/dw_mmc.c
+++ b/drivers/mmc/dw_mmc.c
@@ -97,7 +97,7 @@ static int dwmci_data_transfer(struct dwmci_host *host,
struct mmc_data *data)
{
int ret = 0;
u32 timeout = 240000;
- u32 mask, size, i, len = 0;
+ u32 status, ctrl, mask, size, i, len = 0;
u32 *buf = NULL;
ulong start = get_timer(0);
u32 fifo_depth = (((host->fifoth_val & RX_WMARK_MASK) >>
@@ -114,6 +114,23 @@ static int dwmci_data_transfer(struct dwmci_host *host,
struct mmc_data *data)
/* Error during data transfer. */
if (mask & (DWMCI_DATA_ERR | DWMCI_DATA_TOUT)) {
debug("%s: DATA ERROR!\n", __func__);
+
+ dwmci_wait_reset(host, DWMCI_RESET_ALL);
+ dwmci_writel(host, DWMCI_CMD, DWMCI_CMD_PRV_DAT_WAIT |
+ DWMCI_CMD_UPD_CLK | DWMCI_CMD_START);
+
+ do {
+ status = dwmci_readl(host, DWMCI_CMD);
+ if (timeout-- < 0)
+ ret = -ETIMEDOUT;
+ } while (status & DWMCI_CMD_START);
+
+ if (!host->fifo_mode) {
+ ctrl = dwmci_readl(host, DWMCI_BMOD);
+ ctrl |= DWMCI_BMOD_IDMAC_RESET;
+ dwmci_writel(host, DWMCI_BMOD, ctrl);
+ }
+
ret = -EINVAL;
break;
}
--
2.7.4
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