diff options
| -rw-r--r-- | board/samsung/e850-96/e850-96.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/board/samsung/e850-96/e850-96.c b/board/samsung/e850-96/e850-96.c index 3bbd95201b5..addfe046097 100644 --- a/board/samsung/e850-96/e850-96.c +++ b/board/samsung/e850-96/e850-96.c @@ -4,9 +4,17 @@ * Author: Sam Protsenko <semen.protsenko@linaro.org> */ +#include <env.h> #include <init.h> +#include <mapmem.h> +#include <asm/io.h> #include "fw.h" +/* OTP Controller base address and register offsets */ +#define EXYNOS850_OTP_BASE 0x10000000 +#define OTP_CHIPID0 0x4 +#define OTP_CHIPID1 0x8 + int dram_init(void) { return fdtdec_setup_mem_size_base(); @@ -17,6 +25,33 @@ int dram_init_banksize(void) return fdtdec_setup_memory_banksize(); } +/* Read the unique SoC ID from OTP registers */ +static u64 get_chip_id(void) +{ + void __iomem *otp_base; + u64 val; + + otp_base = map_sysmem(EXYNOS850_OTP_BASE, 12); + val = readl(otp_base + OTP_CHIPID0); + val |= (u64)readl(otp_base + OTP_CHIPID1) << 32UL; + unmap_sysmem(otp_base); + + return val; +} + +static void setup_serial(void) +{ + char serial_str[17] = { 0 }; + u64 serial_num; + + if (env_get("serial#")) + return; + + serial_num = get_chip_id(); + snprintf(serial_str, sizeof(serial_str), "%016llx", serial_num); + env_set("serial#", serial_str); +} + int board_init(void) { return 0; @@ -26,6 +61,8 @@ int board_late_init(void) { int err; + setup_serial(); + /* * Do this in board_late_init() to make sure MMC is not probed before * efi_init_early(). |