From: Guillaume LECERF <glecerf@gmail.com>
To: linux-mtd@lists.infradead.org
Cc: fggs@terra.com.br, zhangyd6@gmail.com, David.Woodhouse@intel.com,
w.sang@pengutronix.de
Subject: [PATCH] mtd: cfi_cmdset_0002: add CFI detection for SST 38VF640x chips
Date: Tue, 26 Oct 2010 12:31:55 +0200 [thread overview]
Message-ID: <20101026103155.8202.76596.stgit@dev.siriade.com> (raw)
Add support for SST38VF640x chips in CFI mode.
Signed-off-by: Guillaume LECERF <glecerf@gmail.com>
Signed-off-by: yidong zhang <zhangyd6@gmail.com>
---
drivers/mtd/chips/cfi_cmdset_0002.c | 26 ++++++++++++++++++++++++++
1 files changed, 26 insertions(+), 0 deletions(-)
diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
index 1934476..2da3818 100644
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -293,6 +293,21 @@ static void fixup_sst39vf_rev_b(struct mtd_info *mtd, void *param)
cfi->addr_unlock2 = 0x2AA;
}
+static void fixup_sst38vf640x_sectorsize(struct mtd_info *mtd, void *param)
+{
+ struct map_info *map = mtd->priv;
+ struct cfi_private *cfi = map->fldrv_priv;
+
+ fixup_sst39vf_rev_b(mtd, param);
+
+ /*
+ * CFI reports 1024 sectors (0x03ff+1) of 64KBytes (0x0100*256) where
+ * it should report a size of 8KBytes (0x0020*256).
+ */
+ cfi->cfiq->EraseRegionInfo[0] = 0x002003ff;
+ pr_warning("%s: Bad 38VF640x CFI data, adjusting sector size from 64 to 8KiB\n", mtd->name);
+}
+
static void fixup_s29gl064n_sectors(struct mtd_info *mtd, void *param)
{
struct map_info *map = mtd->priv;
@@ -344,6 +359,10 @@ 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_SST, 0x536A, fixup_sst38vf640x_sectorsize, NULL, }, /* SST38VF6402 */
+ { CFI_MFR_SST, 0x536B, fixup_sst38vf640x_sectorsize, NULL, }, /* SST38VF6401 */
+ { CFI_MFR_SST, 0x536C, fixup_sst38vf640x_sectorsize, NULL, }, /* SST38VF6404 */
+ { CFI_MFR_SST, 0x536D, fixup_sst38vf640x_sectorsize, NULL, }, /* SST38VF6403 */
#if !FORCE_WORD_WRITE
{ CFI_MFR_ANY, CFI_ID_ANY, fixup_use_write_buffers, NULL, },
#endif
@@ -374,6 +393,13 @@ static void cfi_fixup_major_minor(struct cfi_private *cfi,
if (cfi->mfr == CFI_MFR_SAMSUNG && cfi->id == 0x257e &&
extp->MajorVersion == '0')
extp->MajorVersion = '1';
+ /*
+ * SST 38VF640x chips report major=0xFF / minor=0xFF.
+ */
+ if (cfi->mfr == CFI_MFR_SST && (cfi->id >> 4) == 0x0536) {
+ extp->MajorVersion = '1';
+ extp->MinorVersion = '0';
+ }
}
struct mtd_info *cfi_cmdset_0002(struct map_info *map, int primary)
reply other threads:[~2010-10-26 10:33 UTC|newest]
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