diff options
Diffstat (limited to 'spi.c')
| -rw-r--r-- | spi.c | 41 |
1 files changed, 41 insertions, 0 deletions
@@ -61,6 +61,16 @@ static int spi_rdid(unsigned char *readarr, int bytes) return 0; } +static int spi_rems(unsigned char *readarr) +{ + const unsigned char cmd[JEDEC_REMS_OUTSIZE] = { JEDEC_REMS, 0, 0, 0 }; + + if (spi_command(sizeof(cmd), JEDEC_REMS_INSIZE, cmd, readarr)) + return 1; + printf_debug("REMS returned %02x %02x.\n", readarr[0], readarr[1]); + return 0; +} + static int spi_res(unsigned char *readarr) { const unsigned char cmd[JEDEC_RES_OUTSIZE] = { JEDEC_RES, 0, 0, 0 }; @@ -155,6 +165,37 @@ int probe_spi_rdid4(struct flashchip *flash) return 0; } +int probe_spi_rems(struct flashchip *flash) +{ + unsigned char readarr[JEDEC_REMS_INSIZE]; + uint32_t manuf_id, model_id; + + if (spi_rems(readarr)) + return 0; + + manuf_id = readarr[0]; + model_id = readarr[1]; + + printf_debug("%s: id1 0x%x, id2 0x%x\n", __FUNCTION__, manuf_id, + model_id); + + if (manuf_id == flash->manufacture_id && model_id == flash->model_id) { + /* Print the status register to tell the + * user about possible write protection. + */ + spi_prettyprint_status_register(flash); + + return 1; + } + + /* Test if this is a pure vendor match. */ + if (manuf_id == flash->manufacture_id && + GENERIC_DEVICE_ID == flash->model_id) + return 1; + + return 0; +} + int probe_spi_res(struct flashchip *flash) { unsigned char readarr[3]; |
