From: Madhusudhan Chikkature<madhu.cr@xxxxxx>
ARM: OMAP3: HSMMC fix for hotplug scenario.
This patch fixes the inconsistancy noted if the card is removed from the slot
duing an active I/O.
Signed-off-by: Madhusudhan Chikkature<madhu.cr@xxxxxx>
Signed-off-by: Romit Dasgupta <romit@xxxxxx>
---
drivers/mmc/host/omap_hsmmc.c | 11 +++++++++--
1 files changed, 9 insertions(+), 2 deletions(-)
Index: linux-omap-ti.git-07142008/drivers/mmc/host/omap_hsmmc.c
===================================================================
--- linux-omap-ti.git-07142008.orig/drivers/mmc/host/omap_hsmmc.c 2008-07-17
16:07:05.000000000 +0530
+++ linux-omap-ti.git-07142008/drivers/mmc/host/omap_hsmmc.c 2008-07-17
16:08:48.000000000 +0530
@@ -85,6 +85,7 @@
#define INIT_STREAM_CMD 0x00000000
#define DUAL_VOLT_OCR_BIT 7
#define SRC (1 << 25)
+#define SRD (1 << 26)
#define OMAP_MMC1_DEVID 1
#define OMAP_MMC2_DEVID 2
@@ -301,6 +302,7 @@ static void mmc_dma_cleanup(struct mmc_o
static irqreturn_t mmc_omap_irq(int irq, void *dev_id)
{
struct mmc_omap_host *host = dev_id;
+ struct mmc_data *data;
int end_cmd = 0, end_trans = 0, status;
if (host->cmd == NULL && host->data == NULL) {
@@ -309,6 +311,7 @@ static irqreturn_t mmc_omap_irq(int irq,
return IRQ_HANDLED;
}
+ data = host->data;
status = OMAP_HSMMC_READ(host->base, STAT);
dev_dbg(mmc_dev(host->mmc), "IRQ Status is %x\n", status);
@@ -356,7 +359,7 @@ static irqreturn_t mmc_omap_irq(int irq,
if (end_cmd || (status & CC))
mmc_omap_cmd_done(host, host->cmd);
if (end_trans || (status & TC))
- mmc_omap_xfer_done(host, host->data);
+ mmc_omap_xfer_done(host, data);
return IRQ_HANDLED;
}
@@ -436,8 +439,12 @@ static void mmc_omap_detect(struct work_
host->mmc->ios.vdd = vdd;
}
mmc_detect_change(host->mmc, (HZ * 200) / 1000);
- } else
+ } else {
+ OMAP_HSMMC_WRITE(host->base, SYSCTL,
+ OMAP_HSMMC_READ(host->base, SYSCTL) | SRD);
+ while (OMAP_HSMMC_READ(host->base, SYSCTL) & SRD) ;
mmc_detect_change(host->mmc, (HZ * 50) / 1000);
+ }
}
/*
--
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