diff options
| author | Nicolas Boichat <drinkcat@google.com> | 2017-06-02 22:04:54 +0800 |
|---|---|---|
| committer | ChromeOS Commit Bot <chromeos-commit-bot@chromium.org> | 2017-09-27 19:01:46 +0000 |
| commit | 4165c750daeb48ac689d2d672eaef7a690e39c92 (patch) | |
| tree | fd53606e8981f89396a3478166343002812664d4 | |
| parent | 7a16e40adb108eaedb3a46619fcdf99cdd9a1b9d (diff) | |
| download | chrome-ec-4165c750daeb48ac689d2d672eaef7a690e39c92.tar.gz | |
stm32: Add function to fetch unique id
BRANCH=none
BUG=b:62280271
TEST=Flash hammer
lsusb -d 18d1:5022 -v -v | grep iSerial
shows different chip IDs on different boards.
Change-Id: Id56b4509f184eb722d04fef94079c150dc2016e2
Reviewed-on: https://chromium-review.googlesource.com/523044
Commit-Ready: Nicolas Boichat <drinkcat@chromium.org>
Tested-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Nick Sanders <nsanders@chromium.org>
(cherry picked from commit aa15b8621d62b8926ca4853cdf9c336f0b892db9)
Reviewed-on: https://chromium-review.googlesource.com/688234
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Commit-Queue: Vincent Palatin <vpalatin@chromium.org>
Tested-by: Vincent Palatin <vpalatin@chromium.org>
Trybot-Ready: Vincent Palatin <vpalatin@chromium.org>
| -rw-r--r-- | chip/stm32/registers.h | 4 | ||||
| -rw-r--r-- | chip/stm32/system.c | 6 | ||||
| -rw-r--r-- | include/system.h | 9 |
3 files changed, 18 insertions, 1 deletions
diff --git a/chip/stm32/registers.h b/chip/stm32/registers.h index ce73b4648b..d1e3758594 100644 --- a/chip/stm32/registers.h +++ b/chip/stm32/registers.h @@ -2316,7 +2316,9 @@ typedef volatile struct stm32_dma_regs stm32_dma_regs_t; /* --- MISC --- */ -#define STM32_UNIQUE_ID 0x1ffff7ac +#define STM32_UNIQUE_ID_ADDRESS REG32_ADDR(0x1ffff7ac) +#define STM32_UNIQUE_ID_LENGTH (3 * 4) + #define STM32_CEC_BASE 0x40007800 /* STM32F373 */ #define STM32_LCD_BASE 0x40002400 diff --git a/chip/stm32/system.c b/chip/stm32/system.c index 9f90d2db41..c40790be40 100644 --- a/chip/stm32/system.c +++ b/chip/stm32/system.c @@ -344,6 +344,12 @@ const char *system_get_chip_revision(void) return ""; } +int system_get_chip_unique_id(uint8_t **id) +{ + *id = (uint8_t *)STM32_UNIQUE_ID_ADDRESS; + return STM32_UNIQUE_ID_LENGTH; +} + static int bkpdata_index_lookup(enum system_bbram_idx idx, int *msb) { *msb = 0; diff --git a/include/system.h b/include/system.h index 26a57d9d61..c7304a4d92 100644 --- a/include/system.h +++ b/include/system.h @@ -276,6 +276,15 @@ const char *system_get_chip_vendor(void); const char *system_get_chip_name(void); const char *system_get_chip_revision(void); +/** + * Get a unique per-chip id. + * + * @param id Set to the address of the unique id data (statically + * allocated, or register-backed). + * @return Number of bytes available at the provided address. + */ +int system_get_chip_unique_id(uint8_t **id); + /* * Common bbram entries. Chips don't necessarily need to implement * all of these, error will be returned from system_get/set_bbram if |