From: Jerry Huang <Chang-Ming.Huang@xxxxxxxxxxxxx>
Add auto CMD12 command support for eSDHC driver.
This is needed by P4080 and P1022 for block read/write.
Manual asynchronous CMD12 abort operation causes protocol violations on
these silicons.
Signed-off-by: Jerry Huang <Chang-Ming.Huang@xxxxxxxxxxxxx>
Signed-off-by: Roy Zang <tie-fei.zang@xxxxxxxxxxxxx>
---
drivers/mmc/host/sdhci-of-core.c | 4 ++++
drivers/mmc/host/sdhci.c | 14 ++++++++++++--
drivers/mmc/host/sdhci.h | 2 ++
3 files changed, 18 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/host/sdhci-of-core.c b/drivers/mmc/host/sdhci-of-core.c
index a2e9820..dd1bdd1 100644
--- a/drivers/mmc/host/sdhci-of-core.c
+++ b/drivers/mmc/host/sdhci-of-core.c
@@ -154,6 +154,10 @@ static int __devinit sdhci_of_probe(struct of_device *ofdev,
host->ops = &sdhci_of_data->ops;
}
+ if (of_get_property(np, "sdhci,auto-cmd12", NULL))
+ host->quirks |= SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12;
+
+
if (of_get_property(np, "sdhci,1-bit-only", NULL))
host->quirks |= SDHCI_QUIRK_FORCE_1_BIT_DATA;
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index c6d1bd8..a92566e 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -817,8 +817,12 @@ static void sdhci_set_transfer_mode(struct sdhci_host *host,
WARN_ON(!host->data);
mode = SDHCI_TRNS_BLK_CNT_EN;
- if (data->blocks > 1)
- mode |= SDHCI_TRNS_MULTI;
+ if (data->blocks > 1) {
+ if (host->quirks & SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12)
+ mode |= SDHCI_TRNS_MULTI | SDHCI_TRNS_ACMD12;
+ else
+ mode |= SDHCI_TRNS_MULTI;
+ }
if (data->flags & MMC_DATA_READ)
mode |= SDHCI_TRNS_READ;
if (host->flags & SDHCI_REQ_USE_DMA)
@@ -1108,6 +1112,12 @@ static void sdhci_request(struct mmc_host *mmc, struct mmc_request *mrq)
#ifndef SDHCI_USE_LEDS_CLASS
sdhci_activate_led(host);
#endif
+ if (host->quirks & SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12) {
+ if (mrq->stop) {
+ mrq->data->stop = NULL;
+ mrq->stop = NULL;
+ }
+ }
host->mrq = mrq;
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h
index c846813..8fb088c 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -240,6 +240,8 @@ struct sdhci_host {
#define SDHCI_QUIRK_CAP_CLOCK_BASE_BROKEN (1<<25)
/* Controller cannot support End Attribute in NOP ADMA descriptor */
#define SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC (1<<26)
+/* Controller uses Auto CMD12 command to stop the transfer */
+#define SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12 (1<<27)
int irq; /* Device IRQ */
void __iomem * ioaddr; /* Mapped address */
--
1.5.6.5
--
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