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mmc: Implement card detection.

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Check for card detect each time an MMC/SD device is initialized. If card
detection is not implemented, this code behaves as before and continues
assuming a card is present. If no card is detected, has_init is reset
for the MMC/SD device (to force initialization next time) and an error
is returned.

Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
Tested-by: Jason Liu <jason.hui@linaro.org>
This commit is contained in:
Thierry Reding
2012-01-02 01:15:37 +00:00
committed by Andy Fleming
parent 314284b156
commit 48972d907a
15 changed files with 33 additions and 0 deletions
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2
include/mmc.h
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@@ -302,6 +302,7 @@ struct mmc {
struct mmc_cmd *cmd, struct mmc_data *data);
void (*set_ios)(struct mmc *mmc);
int (*init)(struct mmc *mmc);
int (*getcd)(struct mmc *mmc);
uint b_max;
};
@@ -316,6 +317,7 @@ void print_mmc_devices(char separator);
int get_mmc_num(void);
int board_mmc_getcd(struct mmc *mmc);
int mmc_switch_part(int dev_num, unsigned int part_num);
int mmc_getcd(struct mmc *mmc);
#ifdef CONFIG_GENERIC_MMC
int atmel_mci_init(void *regs);