diff options
Diffstat (limited to 'arch/arm/mach-imx/boot.c')
| -rw-r--r-- | arch/arm/mach-imx/boot.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/boot.c b/arch/arm/mach-imx/boot.c index 489306072f..72597f5e2d 100644 --- a/arch/arm/mach-imx/boot.c +++ b/arch/arm/mach-imx/boot.c @@ -25,6 +25,7 @@ #include <mach/imx51-regs.h> #include <mach/imx53-regs.h> #include <mach/imx6-regs.h> +#include <mach/imx7-regs.h> /* [CTRL][TYPE] */ static const enum bootsource locations[4][4] = { @@ -346,3 +347,72 @@ void imx6_boot_save_loc(void) bootsource_set(src); bootsource_set_instance(instance); } + +#define IMX7_SRC_SBMR1 0x58 +#define IMX7_SRC_SBMR2 0x70 + +void imx7_get_boot_source(enum bootsource *src, int *instance) +{ + void __iomem *src_base = IOMEM(MX7_SRC_BASE_ADDR); + uint32_t sbmr1 = readl(src_base + IMX7_SRC_SBMR1); + uint32_t sbmr2 = readl(src_base + IMX7_SRC_SBMR2); + int boot_mode; + + /* BMOD[1:0] */ + boot_mode = (sbmr2 >> 24) & 0x3; + + switch (boot_mode) { + case 0: /* Fuses, fall through */ + case 2: /* internal boot */ + goto internal_boot; + case 1: /* Serial Downloader */ + *src = BOOTSOURCE_SERIAL; + break; + case 3: /* reserved */ + break; + }; + + return; + +internal_boot: + + switch ((sbmr1 >> 12) & 0xf) { + case 1: + case 2: + *src = BOOTSOURCE_MMC; + *instance = (sbmr1 >> 10 & 0x3); + break; + case 3: + *src = BOOTSOURCE_NAND; + break; + case 4: + *src = BOOTSOURCE_SPI_NOR, + *instance = (sbmr1 >> 9 & 0x7); + break; + case 6: + *src = BOOTSOURCE_SPI; /* Really: qspi */ + break; + case 5: + *src = BOOTSOURCE_NOR; + break; + default: + break; + } + + /* BOOT_CFG1[7:0] */ + if (sbmr1 & (1 << 7)) + *src = BOOTSOURCE_NAND; + + return; +} + +void imx7_boot_save_loc(void) +{ + enum bootsource src = BOOTSOURCE_UNKNOWN; + int instance = BOOTSOURCE_INSTANCE_UNKNOWN; + + imx7_get_boot_source(&src, &instance); + + bootsource_set(src); + bootsource_set_instance(instance); +} |