diff options
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/chips/cfi_probe.c | 47 |
1 files changed, 24 insertions, 23 deletions
diff --git a/drivers/mtd/chips/cfi_probe.c b/drivers/mtd/chips/cfi_probe.c index e63e674..f657d16 100644 --- a/drivers/mtd/chips/cfi_probe.c +++ b/drivers/mtd/chips/cfi_probe.c @@ -181,29 +181,6 @@ static int __xipram cfi_chip_setup(struct map_info *map, for (i=0; i<(sizeof(struct cfi_ident) + num_erase_regions * 4); i++) ((unsigned char *)cfi->cfiq)[i] = cfi_read_query(map,base + (0x10 + i)*ofs_factor); - /* Note we put the device back into Read Mode BEFORE going into Auto - * Select Mode, as some devices support nesting of modes, others - * don't. This way should always work. - * On cmdset 0001 the writes of 0xaa and 0x55 are not needed, and - * so should be treated as nops or illegal (and so put the device - * back into Read Mode, which is a nop in this case). - */ - cfi_send_gen_cmd(0xf0, 0, base, map, cfi, cfi->device_type, NULL); - cfi_send_gen_cmd(0xaa, 0x555, base, map, cfi, cfi->device_type, NULL); - cfi_send_gen_cmd(0x55, 0x2aa, base, map, cfi, cfi->device_type, NULL); - cfi_send_gen_cmd(0x90, 0x555, base, map, cfi, cfi->device_type, NULL); - cfi->mfr = cfi_read_query16(map, base); - cfi->id = cfi_read_query16(map, base + ofs_factor); - - /* Get AMD/Spansion extended JEDEC ID */ - if (cfi->mfr == CFI_MFR_AMD && (cfi->id & 0xff) == 0x7e) - cfi->id = cfi_read_query(map, base + 0xe * ofs_factor) << 8 | - cfi_read_query(map, base + 0xf * ofs_factor); - - /* Put it back into Read Mode */ - cfi_qry_mode_off(base, map, cfi); - xip_allowed(base, map); - /* Do any necessary byteswapping */ cfi->cfiq->P_ID = le16_to_cpu(cfi->cfiq->P_ID); @@ -228,6 +205,30 @@ static int __xipram cfi_chip_setup(struct map_info *map, #endif } + /* + * Note we put the device back into Read Mode BEFORE going into Auto + * Select Mode, as some devices support nesting of modes, others + * don't. This way should always work. + * On cmdset 0001 the writes of 0xaa and 0x55 are not needed, and + * so should be treated as nops or illegal (and so put the device + * back into Read Mode, which is a nop in this case). + */ + cfi_send_gen_cmd(0xf0, 0, base, map, cfi, cfi->device_type, NULL); + cfi_send_gen_cmd(0xaa, 0x555, base, map, cfi, cfi->device_type, NULL); + cfi_send_gen_cmd(0x55, 0x2aa, base, map, cfi, cfi->device_type, NULL); + cfi_send_gen_cmd(0x90, 0x555, base, map, cfi, cfi->device_type, NULL); + cfi->mfr = cfi_read_query16(map, base); + cfi->id = cfi_read_query16(map, base + ofs_factor); + + /* Get AMD/Spansion extended JEDEC ID */ + if (cfi->mfr == CFI_MFR_AMD && (cfi->id & 0xff) == 0x7e) + cfi->id = cfi_read_query(map, base + 0xe * ofs_factor) << 8 | + cfi_read_query(map, base + 0xf * ofs_factor); + + /* Put it back into Read Mode */ + cfi_qry_mode_off(base, map, cfi); + xip_allowed(base, map); + printk(KERN_INFO "%s: Found %d x%d devices at 0x%x in %d-bit bank\n", map->name, cfi->interleave, cfi->device_type*8, base, map->bankwidth*8); |