When the spl_mmc_load_image function being called, it will call mmc_initialize function. By default, it will call board_mmc_init.
The main purpose of board_mmc_init (in practice) is to initialize all the mmc ports defined by CONFIG_SYS_FSL_USDHC_NUM.
While, in spl_board_mmc_init, it will read the bootstrap to see which mmc port is active and configure it.
Then, it pass the configuration to fsl_esdhc_initialize for initialization. Finally, the spl_mmc_load_image could load and run the u-boot.img
Signed-off-by: John Tobias john.tobias.ph@gmail.com --- drivers/mmc/mmc.c | 9 ++++++--- include/mmc.h | 3 +++ 2 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c index 44a4feb..88c1b03 100644 --- a/drivers/mmc/mmc.c +++ b/drivers/mmc/mmc.c @@ -1441,11 +1441,14 @@ int mmc_initialize(bd_t *bis) INIT_LIST_HEAD (&mmc_devices); cur_dev_num = 0;
- if (board_mmc_init(bis) < 0) +#ifdef CONFIG_SPL_BUILD + if (spl_board_mmc_init(bis) < 0) cpu_mmc_init(bis); +#else + if (board_mmc_init(bis) < 0) + cpu_mmc_init(bis);
-#ifndef CONFIG_SPL_BUILD - print_mmc_devices(','); + print_mmc_devices(','); #endif
do_preinit(); diff --git a/include/mmc.h b/include/mmc.h index d74a190..37119b8 100644 --- a/include/mmc.h +++ b/include/mmc.h @@ -388,6 +388,9 @@ int mmc_legacy_init(int verbose); int board_mmc_init(bd_t *bis); int cpu_mmc_init(bd_t *bis); int mmc_get_env_addr(struct mmc *mmc, int copy, u32 *env_addr); +#ifdef CONFIG_SPL +int spl_board_mmc_init(bd_t *bis); +#endif
/* Set block count limit because of 16 bit register limit on some hardware*/ #ifndef CONFIG_SYS_MMC_MAX_BLK_COUNT