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path: root/drivers/mmc/core/core.c
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Diffstat (limited to 'drivers/mmc/core/core.c')
-rw-r--r--drivers/mmc/core/core.c26
1 files changed, 23 insertions, 3 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 150b5f3cd401..1f453acc8682 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -167,8 +167,6 @@ mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
WARN_ON(!host->claimed);
- led_trigger_event(host->led, LED_FULL);
-
mrq->cmd->error = 0;
mrq->cmd->mrq = mrq;
if (mrq->data) {
@@ -194,6 +192,7 @@ mmc_start_request(struct mmc_host *host, struct mmc_request *mrq)
}
}
mmc_host_clk_ungate(host);
+ led_trigger_event(host->led, LED_FULL);
host->ops->request(host, mrq);
}
@@ -528,7 +527,14 @@ int mmc_try_claim_host(struct mmc_host *host)
}
EXPORT_SYMBOL(mmc_try_claim_host);
-static void mmc_do_release_host(struct mmc_host *host)
+/**
+ * mmc_do_release_host - release a claimed host
+ * @host: mmc host to release
+ *
+ * If you successfully claimed a host, this function will
+ * release it again.
+ */
+void mmc_do_release_host(struct mmc_host *host)
{
unsigned long flags;
@@ -543,6 +549,7 @@ static void mmc_do_release_host(struct mmc_host *host)
wake_up(&host->wq);
}
}
+EXPORT_SYMBOL(mmc_do_release_host);
void mmc_host_deeper_disable(struct work_struct *work)
{
@@ -1002,6 +1009,13 @@ static void mmc_power_off(struct mmc_host *host)
{
host->ios.clock = 0;
host->ios.vdd = 0;
+
+ /*
+ * Reset ocr mask to be the highest possible voltage supported for
+ * this mmc host. This value will be used at next power up.
+ */
+ host->ocr = 1 << (fls(host->ocr_avail) - 1);
+
if (!mmc_host_is_spi(host)) {
host->ios.bus_mode = MMC_BUSMODE_OPENDRAIN;
host->ios.chip_select = MMC_CS_DONTCARE;
@@ -1495,6 +1509,12 @@ static int mmc_rescan_try_freq(struct mmc_host *host, unsigned freq)
mmc_hostname(host), __func__, host->f_init);
#endif
mmc_power_up(host);
+
+ /*
+ * sdio_reset sends CMD52 to reset card. Since we do not know
+ * if the card is being re-initialized, just send it. CMD52
+ * should be ignored by SD/eMMC cards.
+ */
sdio_reset(host);
mmc_go_idle(host);