Implement mmc_get_env_devno, devno can be got from smbr1 of SRC. Introduce a weak function board_mmc_get_env_devno, different boards can implement it according to different sdhc controllers that used by the board.
Signed-off-by: Peng Fan peng.fan@nxp.com Cc: Stefano Babic sbabic@denx.de ---
Changes V2: move mmc_get_env_devno into soc.c
arch/arm/cpu/armv7/mx6/soc.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+)
diff --git a/arch/arm/cpu/armv7/mx6/soc.c b/arch/arm/cpu/armv7/mx6/soc.c index bf5ae8c..fd383f2 100644 --- a/arch/arm/cpu/armv7/mx6/soc.c +++ b/arch/arm/cpu/armv7/mx6/soc.c @@ -349,6 +349,36 @@ int arch_cpu_init(void) return 0; }
+__weak int board_mmc_get_env_devno(int devno) +{ + return CONFIG_SYS_MMC_ENV_DEV; +} + +int mmc_get_env_devno(void) +{ + struct src *src_regs = (struct src *)SRC_BASE_ADDR; + u32 soc_sbmr = readl(&src_regs->sbmr1); + u32 bootsel; + int devno; + + /* + * Refer to + * "i.MX 6Dual/6Quad Applications Processor Reference Manual" + * Chapter "8.5.3.1 Expansion Device eFUSE Configuration" + * i.MX6SL/SX/UL has same layout. + */ + bootsel = (soc_sbmr & 0x000000FF) >> 6; + + /* If not boot from sd/mmc, use default value */ + if (bootsel != 1) + return CONFIG_SYS_MMC_ENV_DEV; + + /* BOOT_CFG2[3] and BOOT_CFG2[4] */ + devno = (soc_sbmr & 0x00001800) >> 11; + + return board_mmc_get_env_devno(devno); +} + int board_postclk_init(void) { set_ldo_voltage(LDO_SOC, 1175); /* Set VDDSOC to 1.175V */