Timur Tabi wrote:
Stefan Roese wrote:
As you may notice, even the ID's are not correct (0020 and 22c4 are correct) and the geometry is not correct (bottom instead of top).
It looks like the problem with the IDs (I have them too) is that flash_read_jedec_ids() is broken. After sending the commands, the function just reads the regular data instead of the command reply.
Well, I think I fixed it.
In flash_read_jedec_ids(), make this change:
- flash_write_cmd(info, 0, 0, FLASH_CMD_READ_ID); + flash_write_cmd(info, 0, AMD_ADDR_START, FLASH_CMD_READ_ID);
I got the value of AMD_ADDR_START from the MX29LV640BT/BB reference manual, which says that the third bus cycle should be a write of 90h to 555 or AAA, depending on the width.
Now when I run flinfo, I get this:
Bank # 1: CFI conformant FLASH (16 x 16) Size: 8 MB in 135 Sectors AMD Standard command set, Manufacturer ID: 0xC2, Device ID: 0xC9 Erase timeout: 16384 ms, write timeout: 1 ms
If this fix is real, then it means that flash_read_jedec_ids() never worked for any AMD part.