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mtd: cfi_cmdset_0002: add 0xFF intolerance for M29W128G

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The M29W128G Numonyx flash devices are intolerant to any 0xFF command:
in the Cfi_util.c the function cfi_qry_mode_off() (that resets the device
after the autoselect mode) must have a 0xF0 command after the 0xFF command.
This fix solves also the cause of the fixup_M29W128G_write_buffer() fix,
that can be removed now.
The following patch applies to 2.6.30 kernel.

Signed-off-by: Massimo Cirillo <maxcir@gmail.com>
Acked-by: Alexey Korolev <akorolev@infradead.org>
Cc: stable@kernel.org
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Massimo Cirillo 2009-09-03 16:34:39 +02:00 committed by David Woodhouse
parent 6ad08ddd9e
commit 23af51ecfb
2 changed files with 4 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/mtd/chips/cfi_cmdset_0002.c
View File

@ -282,16 +282,6 @@ static void fixup_s29gl032n_sectors(struct mtd_info *mtd, void *param)
}
}
static void fixup_M29W128G_write_buffer(struct mtd_info *mtd, void *param)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
if (cfi->cfiq->BufWriteTimeoutTyp) {
pr_warning("Don't use write buffer on ST flash M29W128G\n");
cfi->cfiq->BufWriteTimeoutTyp = 0;
}
}
static struct cfi_fixup cfi_fixup_table[] = {
{ CFI_MFR_ATMEL, CFI_ID_ANY, fixup_convert_atmel_pri, NULL },
#ifdef AMD_BOOTLOC_BUG
@ -308,7 +298,6 @@ static struct cfi_fixup cfi_fixup_table[] = {
{ CFI_MFR_AMD, 0x1301, fixup_s29gl064n_sectors, NULL, },
{ CFI_MFR_AMD, 0x1a00, fixup_s29gl032n_sectors, NULL, },
{ CFI_MFR_AMD, 0x1a01, fixup_s29gl032n_sectors, NULL, },
{ CFI_MFR_ST, 0x227E, fixup_M29W128G_write_buffer, NULL, },
#if !FORCE_WORD_WRITE
{ CFI_MFR_ANY, CFI_ID_ANY, fixup_use_write_buffers, NULL, },
#endif

4
drivers/mtd/chips/cfi_util.c Normal file → Executable file
View File

@ -81,6 +81,10 @@ void __xipram cfi_qry_mode_off(uint32_t base, struct map_info *map,
{
cfi_send_gen_cmd(0xF0, 0, base, map, cfi, cfi->device_type, NULL);
cfi_send_gen_cmd(0xFF, 0, base, map, cfi, cfi->device_type, NULL);
/* M29W128G flashes require an additional reset command
when exit qry mode */
if ((cfi->mfr == CFI_MFR_ST) && (cfi->id == 0x227E || cfi->id == 0x7E))
cfi_send_gen_cmd(0xF0, 0, base, map, cfi, cfi->device_type, NULL);
}
EXPORT_SYMBOL_GPL(cfi_qry_mode_off);