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authorBen Dooks <ben-linux@fluff.org>2008-06-30 22:40:36 +0100
committerPierre Ossman <drzeus@drzeus.cx>2008-07-15 14:14:48 +0200
commit50a845700b3b55f825b0eb901b03d6091f66d9f4 (patch)
tree394d3d5d58d2c9316b455f8922ed01e8cec8f65e
parent2de5f79d4dfcb1be16f0b873bc77d6ec74b0426d (diff)
MMC: S3C24XX: Add media presence test to request handling.
Ensure that we have physical media present before attempting to send a request to a card. This ensures that we do not get flooded by errors from commands that can never be completed timing out. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
-rw-r--r--drivers/mmc/host/s3cmci.c19
-rw-r--r--include/asm-arm/plat-s3c24xx/mci.h1
2 files changed, 19 insertions, 1 deletions
diff --git a/drivers/mmc/host/s3cmci.c b/drivers/mmc/host/s3cmci.c
index 6f1b474e33b9..62d73d3497f0 100644
--- a/drivers/mmc/host/s3cmci.c
+++ b/drivers/mmc/host/s3cmci.c
@@ -984,6 +984,18 @@ static void s3cmci_send_request(struct mmc_host *mmc)
enable_irq(host->irq);
}
+static int s3cmci_card_present(struct s3cmci_host *host)
+{
+ struct s3c24xx_mci_pdata *pdata = host->pdata;
+ int ret;
+
+ if (pdata->gpio_detect == 0)
+ return -ENOSYS;
+
+ ret = s3c2410_gpio_getpin(pdata->gpio_detect) ? 0 : 1;
+ return ret ^ pdata->detect_invert;
+}
+
static void s3cmci_request(struct mmc_host *mmc, struct mmc_request *mrq)
{
struct s3cmci_host *host = mmc_priv(mmc);
@@ -992,7 +1004,12 @@ static void s3cmci_request(struct mmc_host *mmc, struct mmc_request *mrq)
host->cmd_is_stop = 0;
host->mrq = mrq;
- s3cmci_send_request(mmc);
+ if (s3cmci_card_present(host) == 0) {
+ dbg(host, dbg_err, "%s: no medium present\n", __func__);
+ host->mrq->cmd->error = -ENOMEDIUM;
+ mmc_request_done(mmc, mrq);
+ } else
+ s3cmci_send_request(mmc);
}
static void s3cmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
diff --git a/include/asm-arm/plat-s3c24xx/mci.h b/include/asm-arm/plat-s3c24xx/mci.h
index 4f4ccd18f0cb..2d0852ac3b27 100644
--- a/include/asm-arm/plat-s3c24xx/mci.h
+++ b/include/asm-arm/plat-s3c24xx/mci.h
@@ -3,6 +3,7 @@
struct s3c24xx_mci_pdata {
unsigned int wprotect_invert : 1;
+ unsigned int detect_invert : 1; /* set => detect active high. */
unsigned int gpio_detect;
unsigned int gpio_wprotect;