Most controllers can check if there is a card in the slot. However, they require pins that could be not available because required by other functions and the detection of a card must be performed in another way. This patch adds a weak function that a board can implement to add its internal custom way to check the presence of a MMC/SD card.
Signed-off-by: Stefano Babic sbabic@denx.de --- drivers/mmc/mmc.c | 7 +++++++ include/mmc.h | 1 + 2 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index d91b9b7..3679225 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -36,6 +36,13 @@ static struct list_head mmc_devices; static int cur_dev_num = -1;
+int __board_mmc_getcd(u8 *cd, struct mmc *mmc) { + return -1; +} + +int board_mmc_getcd(u8 *cd, struct mmc *mmc)__attribute__((weak, + alias("__board_mmc_getcd"))); + int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data) { return mmc->send_cmd(mmc, cmd, data); diff --git a/include/mmc.h b/include/mmc.h index 2dc69ab..8973bc7 100644 --- a/include/mmc.h +++ b/include/mmc.h @@ -272,6 +272,7 @@ int mmc_init(struct mmc *mmc); int mmc_read(struct mmc *mmc, u64 src, uchar *dst, int size); struct mmc *find_mmc_device(int dev_num); void print_mmc_devices(char separator); +int board_mmc_getcd(u8 *cd, struct mmc *mmc);
#ifndef CONFIG_GENERIC_MMC int mmc_legacy_init(int verbose);