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mtd: cfi_probe: enter Auto Select Mode after filling cfi->cfiq members

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Move the code to enter Auto Select Mode down to be able to use cfi->cfiq
members to add support for chips using alternative sequence / unlock
addresses.

Signed-off-by: Guillaume LECERF <glecerf@gmail.com>
Reviewed-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Guillaume LECERF 2010-04-24 17:57:52 +02:00 committed by David Woodhouse
parent 010937ec9a
commit 8473044d64
1 changed files with 24 additions and 23 deletions
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47
drivers/mtd/chips/cfi_probe.c
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@ -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);