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authorJerry Huang <Chang-Ming.Huang@freescale.com>2010-08-10 18:01:59 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-08-11 08:59:05 -0700
commitc4512f79dcb236c8dc2afae176a0dc520096f0bc (patch)
tree4aced8cb26bae4256e538c6a35679d31c60d7dc2 /drivers/mmc
parent9bea3c850dbff2296892298614388bdc71ad2170 (diff)
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sdhci: add auto CMD12 support for eSDHC driver
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@freescale.com> Signed-off-by: Roy Zang <tie-fei.zang@freescale.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Kumar Gala <galak@gate.crashing.org> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/mmc')
-rw-r--r--drivers/mmc/host/sdhci-of-core.c4
-rw-r--r--drivers/mmc/host/sdhci.c14
-rw-r--r--drivers/mmc/host/sdhci.h2
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 a2e9820cd42f..dd1bdd168e66 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 c86c14af479f..785512133b50 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -818,8 +818,12 @@ 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)
@@ -1109,6 +1113,12 @@ 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 ff070a309f8d..036cfae76368 100644
--- a/drivers/mmc/host/sdhci.h
+++ b/drivers/mmc/host/sdhci.h
@@ -243,6 +243,8 @@ struct sdhci_host {
#define SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC (1<<26)
/* Controller is missing device caps. Use caps provided by host */
#define SDHCI_QUIRK_MISSING_CAPS (1<<27)
+/* Controller uses Auto CMD12 command to stop the transfer */
+#define SDHCI_QUIRK_MULTIBLOCK_READ_ACMD12 (1<<28)
int irq; /* Device IRQ */
void __iomem * ioaddr; /* Mapped address */