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authorMassimo Cirillo <maxcir@gmail.com>2009-09-03 16:34:39 +0200
committerDavid Woodhouse <David.Woodhouse@intel.com>2009-09-19 14:18:43 -0700
commit23af51ecfb04ff65bae51bd8e2270f4449abc789 (patch)
tree32ba264b7afe040e677106f966371f277744e30d /drivers/mtd
parent6ad08ddd9e8b85ad6c49eeb6c5d940ccdd119bde (diff)
mtd: cfi_cmdset_0002: add 0xFF intolerance for M29W128G
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>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/chips/cfi_cmdset_0002.c11
-rwxr-xr-x[-rw-r--r--]drivers/mtd/chips/cfi_util.c4
2 files changed, 4 insertions, 11 deletions
diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
index 61ea833e090..94bb61e1904 100644
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -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
diff --git a/drivers/mtd/chips/cfi_util.c b/drivers/mtd/chips/cfi_util.c
index 34d40e25d31..c5a84fda541 100644..100755
--- a/drivers/mtd/chips/cfi_util.c
+++ b/drivers/mtd/chips/cfi_util.c
@@ -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);