From: Jerry Huang <chang-ming.hu...@freescale.com>
Add callback function to check if the card has been removed.
in order to check if the card has been removed, the function mmc_send_status
will send commad CMD13 to card and ask the card to send its status register to
driver, which will generate interrupt repeatly and make the system bad.
Therefore, get_cd callback is used to detect the card if the driver has.
Signed-off-by: Jerry Huang <chang-ming.hu...@freescale.com>
---
drivers/mmc/core/mmc.c | 5 ++++-
drivers/mmc/core/sd.c | 5 ++++-
2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 06084db..c5c676d 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -494,7 +494,10 @@ static void mmc_detect(struct mmc_host *host)
/*
* Just check if our card has been removed.
*/
- err = mmc_send_status(host->card, NULL);
+ if (host->ops->get_cd)
+ err = !host->ops->get_cd(host);
+ else
+ err = mmc_send_status(host->card, NULL);
mmc_release_host(host);
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index cd81c39..3cf1f38 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -548,7 +548,10 @@ static void mmc_sd_detect(struct mmc_host *host)
/*
* Just check if our card has been removed.
*/
- err = mmc_send_status(host->card, NULL);
+ if (host->ops->get_cd)
+ err = !host->ops->get_cd(host);
+ else
+ err = mmc_send_status(host->card, NULL);
mmc_release_host(host);
--
1.6.4
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