From b1c97e2335f24dbdcc26cfdc882b8b5a0bad25c2 Mon Sep 17 00:00:00 2001 From: Aaron Sierra Date: Mon, 30 Apr 2018 11:34:49 -0500 Subject: [PATCH] mtd: cfi: Support early CFI fixups Some CFI devices need fixups that affect the number of chips detected, but the current fixup infrastructure (struct cfi_fixup and cfi_fixup()) does not cover this situation. Introduce struct cfi_early_fixup and cfi_early_fixup() to fill the void. Signed-off-by: Aaron Sierra Signed-off-by: Boris Brezillon --- drivers/mtd/chips/cfi_probe.c | 30 ++++++++++++++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/drivers/mtd/chips/cfi_probe.c b/drivers/mtd/chips/cfi_probe.c index e8d0164..812df70 100644 --- a/drivers/mtd/chips/cfi_probe.c +++ b/drivers/mtd/chips/cfi_probe.c @@ -63,6 +63,30 @@ do { \ #endif +/* + * This fixup occurs immediately after reading the CFI structure and can affect + * the number of chips detected, unlike cfi_fixup, which occurs after an + * mtd_info structure has been created for the chip. + */ +struct cfi_early_fixup { + uint16_t mfr; + uint16_t id; + void (*fixup)(struct cfi_private *cfi); +}; + +static void cfi_early_fixup(struct cfi_private *cfi, + const struct cfi_early_fixup *fixups) +{ + const struct cfi_early_fixup *f; + + for (f = fixups; f->fixup; f++) { + if (((f->mfr == CFI_MFR_ANY) || (f->mfr == cfi->mfr)) && + ((f->id == CFI_ID_ANY) || (f->id == cfi->id))) { + f->fixup(cfi); + } + } +} + /* check for QRY. in: interleave,type,mode ret: table index, <0 for error @@ -151,6 +175,10 @@ static int __xipram cfi_probe_chip(struct map_info *map, __u32 base, return 1; } +static const struct cfi_early_fixup cfi_early_fixup_table[] = { + { }, +}; + static int __xipram cfi_chip_setup(struct map_info *map, struct cfi_private *cfi) { @@ -235,6 +263,8 @@ static int __xipram cfi_chip_setup(struct map_info *map, cfi_qry_mode_off(base, map, cfi); xip_allowed(base, map); + cfi_early_fixup(cfi, cfi_early_fixup_table); + printk(KERN_INFO "%s: Found %d x%d devices at 0x%x in %d-bit bank. Manufacturer ID %#08x Chip ID %#08x\n", map->name, cfi->interleave, cfi->device_type*8, base, map->bankwidth*8, cfi->mfr, cfi->id); -- 2.7.4