diff options
Diffstat (limited to 'chip/g/flash.c')
| -rw-r--r-- | chip/g/flash.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/chip/g/flash.c b/chip/g/flash.c index d77ad0ad35..6a329756a7 100644 --- a/chip/g/flash.c +++ b/chip/g/flash.c @@ -119,6 +119,7 @@ int flash_physical_protect_now(int all) enum flash_op { OP_ERASE_BLOCK, OP_WRITE_BLOCK, + OP_READ_BLOCK, }; static int do_flash_op(enum flash_op op, int is_info_bank, @@ -180,6 +181,16 @@ static int do_flash_op(enum flash_op op, int is_info_bank, /* This number is based on the TSMC spec Nmp=Tprog/Tsmp */ max_attempts = 9; break; + case OP_READ_BLOCK: + if (!is_info_bank) + /* This code path only supports reading from + * the INFO bank. + */ + return EC_ERROR_INVAL; + opcode = 0x16021765; + words = 1; + max_attempts = 9; + break; } /* @@ -324,6 +335,21 @@ int flash_physical_write(int byte_offset, int num_bytes, const char *data) return flash_physical_write_internal(byte_offset, 0, num_bytes, data); } +int flash_physical_info_read_word(int byte_offset, uint32_t *dst) +{ + int ret; + + if (byte_offset % CONFIG_FLASH_WRITE_SIZE) + return EC_ERROR_INVAL; + + ret = do_flash_op(OP_READ_BLOCK, 1, byte_offset, 1); + if (ret != EC_SUCCESS) + return ret; + + *dst = GREG32(FLASH, FSH_DOUT_VAL1); + return EC_SUCCESS; +} + void flash_info_write_enable(void) { /* Enable R/W access to INFO. */ |