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MMC: add weak function to detect MMC/SD card
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>
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2 changed files with 8 additions and 0 deletions
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@ -36,6 +36,13 @@
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static struct list_head mmc_devices;
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static int cur_dev_num = -1;
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int __board_mmc_getcd(u8 *cd, struct mmc *mmc) {
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return -1;
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}
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int board_mmc_getcd(u8 *cd, struct mmc *mmc)__attribute__((weak,
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alias("__board_mmc_getcd")));
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int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
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{
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return mmc->send_cmd(mmc, cmd, data);
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@ -272,6 +272,7 @@ int mmc_init(struct mmc *mmc);
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int mmc_read(struct mmc *mmc, u64 src, uchar *dst, int size);
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struct mmc *find_mmc_device(int dev_num);
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void print_mmc_devices(char separator);
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int board_mmc_getcd(u8 *cd, struct mmc *mmc);
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#ifndef CONFIG_GENERIC_MMC
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int mmc_legacy_init(int verbose);
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