Hi, Uffe,
Could you please review the patch? Thanks!
BRs,
Sun Yi
-----Original Message-----
From: Sun, Yi Y
Sent: Thursday, August 14, 2014 1:52 PM
To: linux-mmc@xxxxxxxxxxxxxxx; ulf.hansson@xxxxxxxxxx
Cc: Sun, Yi Y
Subject: [PATCH v2] mmc: execute tuning when device is not busy.
We find tuning timeout because of the secure erase operation lasts too long so not to do tuning when device is busy.
Signed-off-by: Yi Sun <yi.y.sun@xxxxxxxxx>
---
drivers/mmc/host/sdhci.c | 7 ++++---
drivers/mmc/host/sdhci.h | 1 +
2 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 47055f3..6a584d7 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1355,11 +1355,12 @@ static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
present_state = sdhci_readl(host, SDHCI_PRESENT_STATE);
/*
* Check if the re-tuning timer has already expired and there
- * is no on-going data transfer. If so, we need to execute
- * tuning procedure before sending command.
+ * is no on-going data transfer and DAT0 is not busy. If so,
+ * we need to execute tuning procedure before sending command.
*/
if ((host->flags & SDHCI_NEEDS_RETUNING) &&
- !(present_state & (SDHCI_DOING_WRITE | SDHCI_DOING_READ))) {
+ !(present_state & (SDHCI_DOING_WRITE | SDHCI_DOING_READ)) &&
+ (present_state & SDHCI_DATA_0_LVL_MASK)) {
if (mmc->card) {
/* eMMC uses cmd21 but sd and sdio use cmd19 */
tuning_opcode =
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index 4a5cd5e..0ae6b99d 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -72,6 +72,7 @@
#define SDHCI_WRITE_PROTECT 0x00080000
#define SDHCI_DATA_LVL_MASK 0x00F00000
#define SDHCI_DATA_LVL_SHIFT 20
+#define SDHCI_DATA_0_LVL_MASK 0x00100000
#define SDHCI_HOST_CONTROL 0x28
#define SDHCI_CTRL_LED 0x01
--
1.7.9.5
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