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-rw-r--r--drivers/mmc/host/dw_mmc.c26
-rw-r--r--include/linux/mmc/dw_mmc.h2
2 files changed, 28 insertions, 0 deletions
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index f68ea4d..8e0836d 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -1021,6 +1021,15 @@ static void __dw_mci_start_request(struct dw_mci *host,
dw_mci_start_command(host, cmd, cmdflags);
+ if (cmd->opcode == SD_SWITCH_VOLTAGE) {
+ /*
+ * Databook says to fail after 2ms w/ no response; give an
+ * extra jiffy just in case we're about to roll over.
+ */
+ mod_timer(&host->cmd11_timer,
+ jiffies + msecs_to_jiffies(2) + 1);
+ }
+
if (mrq->stop)
host->stop_cmdr = dw_mci_prepare_command(slot->mmc, mrq->stop);
else
@@ -2159,6 +2168,8 @@ static irqreturn_t dw_mci_interrupt(int irq, void *dev_id)
/* Check volt switch first, since it can look like an error */
if ((host->state == STATE_SENDING_CMD11) &&
(pending & SDMMC_INT_VOLT_SWITCH)) {
+ del_timer(&host->cmd11_timer);
+
mci_writel(host, RINTSTS, SDMMC_INT_VOLT_SWITCH);
pending &= ~SDMMC_INT_VOLT_SWITCH;
dw_mci_cmd_interrupt(host, pending);
@@ -2572,6 +2583,18 @@ ciu_out:
return ret;
}
+static void dw_mci_cmd11_timer(unsigned long arg)
+{
+ struct dw_mci *host = (struct dw_mci *)arg;
+
+ if (host->state != STATE_SENDING_CMD11)
+ dev_info(host->dev, "Unexpected CMD11 timeout\n");
+
+ host->cmd_status = SDMMC_INT_RTO;
+ set_bit(EVENT_CMD_COMPLETE, &host->pending_events);
+ tasklet_schedule(&host->tasklet);
+}
+
#ifdef CONFIG_OF
static struct dw_mci_of_quirks {
char *quirk;
@@ -2746,6 +2769,9 @@ int dw_mci_probe(struct dw_mci *host)
}
}
+ setup_timer(&host->cmd11_timer,
+ dw_mci_cmd11_timer, (unsigned long)host);
+
host->quirks = host->pdata->quirks;
spin_lock_init(&host->lock);
diff --git a/include/linux/mmc/dw_mmc.h b/include/linux/mmc/dw_mmc.h
index 471fb31..9efc567 100644
--- a/include/linux/mmc/dw_mmc.h
+++ b/include/linux/mmc/dw_mmc.h
@@ -202,6 +202,8 @@ struct dw_mci {
int irq;
int sdio_id0;
+
+ struct timer_list cmd11_timer;
};
/* DMA ops for Internal/External DMAC interface */
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