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mtd: cfi: Add early fixup for S70GL02GS 

S70GL02GS flash reports a single 256 MiB chip, but is really made up
of two 128 MiB chips with 1024 sectors each.

Without early fixups (top half of device cannot be written or erased):
  ff0000000.nor-boot: Found 1 x16 devices at 0x0 in 16-bit bank. <snip>
  Amd/Fujitsu Extended Query Table at 0x0040
    Amd/Fujitsu Extended Query version 1.5.
  number of CFI chips: 1

With early fixups (entire device can be written and erased):
  Bad S70GL02GS CFI data; adjust to detect 2 chips
  ff0000000.nor-boot: Found 1 x16 devices at 0x0 in 16-bit bank. <snip>
  ff0000000.nor-boot: Found 1 x16 devices at 0x8000000 in 16-bit bank
  Amd/Fujitsu Extended Query Table at 0x0040
    Amd/Fujitsu Extended Query version 1.5.
  number of CFI chips: 2

Signed-off-by: Aaron Sierra <asierra@xes-inc.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
This commit is contained in:
Aaron Sierra 2018-04-30 11:35:07 -05:00 committed by Boris Brezillon
parent b1c97e2335
commit 0fe3ede794
1 changed files with 12 additions and 0 deletions
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12
drivers/mtd/chips/cfi_probe.c
View File

@ -175,7 +175,19 @@ static int __xipram cfi_probe_chip(struct map_info *map, __u32 base,
return 1;
}
static void fixup_s70gl02gs_chips(struct cfi_private *cfi)
{
/*
* S70GL02GS flash reports a single 256 MiB chip, but is really made up
* of two 128 MiB chips with 1024 sectors each.
*/
cfi->cfiq->DevSize = 27;
cfi->cfiq->EraseRegionInfo[0] = 0x20003ff;
pr_warn("Bad S70GL02GS CFI data; adjust to detect 2 chips\n");
}
static const struct cfi_early_fixup cfi_early_fixup_table[] = {
{ CFI_MFR_AMD, 0x4801, fixup_s70gl02gs_chips },
{ },
};