diff options
Diffstat (limited to 'util/flashrom/jedec.c')
| -rw-r--r-- | util/flashrom/jedec.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/util/flashrom/jedec.c b/util/flashrom/jedec.c index 958875194a..e818294f0e 100644 --- a/util/flashrom/jedec.c +++ b/util/flashrom/jedec.c @@ -27,6 +27,14 @@ #define MAX_REFLASH_TRIES 0x10 +/* Check one byte for odd parity */ +uint8_t oddparity(uint8_t val) +{ + val = (val ^ (val >> 4)) & 0xf; + val = (val ^ (val >> 2)) & 0x3; + return (val ^ (val >> 1)) & 0x1; +} + void toggle_ready_jedec(volatile uint8_t *dst) { unsigned int i = 0; @@ -123,7 +131,10 @@ int probe_jedec(struct flashchip *flash) *(volatile uint8_t *)(bios + 0x5555) = 0xF0; myusec_delay(40); - printf_debug("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, largeid1, largeid2); + printf_debug("%s: id1 0x%x, id2 0x%x", __FUNCTION__, largeid1, largeid2); + if (!oddparity(id1)) + printf_debug(", id1 parity violation"); + printf_debug("\n"); if (largeid1 == flash->manufacture_id && largeid2 == flash->model_id) return 1; |