Signed-off-by: Andrey Smirnov <andrew.smirnov@xxxxxxxxx> --- arch/arm/mach-imx/boot.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) diff --git a/arch/arm/mach-imx/boot.c b/arch/arm/mach-imx/boot.c index a98c716fb..4082f46ae 100644 --- a/arch/arm/mach-imx/boot.c +++ b/arch/arm/mach-imx/boot.c @@ -306,6 +306,19 @@ void imx6_get_boot_source(enum bootsource *src, int *instance) #define IMX7_SRC_SBMR1 0x58 #define IMX7_SRC_SBMR2 0x70 +#define IMX_BOOT_SW_INFO_POINTER_ADDR 0x000001E8 +#define IMX_BOOT_SW_INFO_BDT_SD 0x1 + +struct imx_boot_sw_info { + uint8_t reserved_1; + uint8_t boot_device_instance; + uint8_t boot_device_type; + uint8_t reserved_2; + uint32_t frequency_hz[4]; /* Various frequencies (ARM, AXI, + * DDR, etc.). Not used */ + uint32_t reserved_3[3]; +} __packed; + void imx7_get_boot_source(enum bootsource *src, int *instance) { void __iomem *src_base = IOMEM(MX7_SRC_BASE_ADDR); @@ -316,6 +329,33 @@ void imx7_get_boot_source(enum bootsource *src, int *instance) return; if (imx6_bootsource_serial(sbmr2)) { + /* + * On i.MX7 ROM code will try to bood from uSDHC1 + * before entering serial mode. It doesn't seem to be + * reflected in the contents of SBMR1 in any way when + * that happens, so we check "Boot_SW_Info" structure + * (per 6.6.14 Boot information for software) to see + * if that really happened. + * + * FIXME: This behaviour can be inhibited by + * DISABLE_SDMMC_MFG, but location of that fuse + * doesn't seem to be documented anywhere. Once that + * is known it should be taken into account here. + */ + const struct imx_boot_sw_info *info; + + info = (const void *)readl(IMX_BOOT_SW_INFO_POINTER_ADDR); + + if (info->boot_device_type == IMX_BOOT_SW_INFO_BDT_SD) { + *src = BOOTSOURCE_MMC; + /* + * We are expecting to only ever boot from + * uSDHC1 here + */ + WARN_ON(*instance = info->boot_device_instance); + return; + } + *src = BOOTSOURCE_SERIAL; return; } -- 2.14.3 _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox