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MTD updates for 3.16-rc6

Browse Source 
- Fix ELM suspend/resume
 - Reduce warnings if NAND ECC is too weak
 - Add CFI support for Sharp LH28F640BF NOR
 
 The last fix is coming in because other commits in the 3.16 cycle depended on
 this support.
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Merge tag 'for-linus-20140716' of git://git.infradead.org/linux-mtd

Pull MTD fixes from Brian Norris:

 - Fix ELM suspend/resume

 - Reduce warnings if NAND ECC is too weak

 - Add CFI support for Sharp LH28F640BF NOR

   The last fix is coming in because other commits in the 3.16 cycle
   depended on this support.

* tag 'for-linus-20140716' of git://git.infradead.org/linux-mtd:
  mtd: cfi_cmdset_0001.c: add support for Sharp LH28F640BF NOR
  mtd: nand: reduce the warning noise when the ECC is too weak
  mtd: devices: elm: fix elm_context_save() and elm_context_restore() functions
This commit is contained in:
Linus Torvalds 2014-07-16 10:11:42 -10:00
commit b6603fe574
3 changed files with 49 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
drivers/mtd/chips/cfi_cmdset_0001.c
View File

@ -52,6 +52,11 @@
/* Atmel chips */
#define AT49BV640D 0x02de
#define AT49BV640DT 0x02db
/* Sharp chips */
#define LH28F640BFHE_PTTL90 0x00b0
#define LH28F640BFHE_PBTL90 0x00b1
#define LH28F640BFHE_PTTL70A 0x00b2
#define LH28F640BFHE_PBTL70A 0x00b3
static int cfi_intelext_read (struct mtd_info *, loff_t, size_t, size_t *, u_char *);
static int cfi_intelext_write_words(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);
@ -258,6 +263,36 @@ static void fixup_st_m28w320cb(struct mtd_info *mtd)
(cfi->cfiq->EraseRegionInfo[1] & 0xffff0000) | 0x3e;
};
static int is_LH28F640BF(struct cfi_private *cfi)
{
/* Sharp LH28F640BF Family */
if (cfi->mfr == CFI_MFR_SHARP && (
cfi->id == LH28F640BFHE_PTTL90 || cfi->id == LH28F640BFHE_PBTL90 ||
cfi->id == LH28F640BFHE_PTTL70A || cfi->id == LH28F640BFHE_PBTL70A))
return 1;
return 0;
}
static void fixup_LH28F640BF(struct mtd_info *mtd)
{
struct map_info *map = mtd->priv;
struct cfi_private *cfi = map->fldrv_priv;
struct cfi_pri_intelext *extp = cfi->cmdset_priv;
/* Reset the Partition Configuration Register on LH28F640BF
* to a single partition (PCR = 0x000): PCR is embedded into A0-A15. */
if (is_LH28F640BF(cfi)) {
printk(KERN_INFO "Reset Partition Config. Register: 1 Partition of 4 planes\n");
map_write(map, CMD(0x60), 0);
map_write(map, CMD(0x04), 0);
/* We have set one single partition thus
* Simultaneous Operations are not allowed */
printk(KERN_INFO "cfi_cmdset_0001: Simultaneous Operations disabled\n");
extp->FeatureSupport &= ~512;
}
}
static void fixup_use_point(struct mtd_info *mtd)
{
struct map_info *map = mtd->priv;
@ -309,6 +344,8 @@ static struct cfi_fixup cfi_fixup_table[] = {
{ CFI_MFR_ST, 0x00ba, /* M28W320CT */ fixup_st_m28w320ct },
{ CFI_MFR_ST, 0x00bb, /* M28W320CB */ fixup_st_m28w320cb },
{ CFI_MFR_INTEL, CFI_ID_ANY, fixup_unlock_powerup_lock },
{ CFI_MFR_SHARP, CFI_ID_ANY, fixup_unlock_powerup_lock },
{ CFI_MFR_SHARP, CFI_ID_ANY, fixup_LH28F640BF },
{ 0, 0, NULL }
};
@ -1649,6 +1686,12 @@ static int __xipram do_write_buffer(struct map_info *map, struct flchip *chip,
initial_adr = adr;
cmd_adr = adr & ~(wbufsize-1);
/* Sharp LH28F640BF chips need the first address for the
* Page Buffer Program command. See Table 5 of
* LH28F320BF, LH28F640BF, LH28F128BF Series (Appendix FUM00701) */
if (is_LH28F640BF(cfi))
cmd_adr = adr;
/* Let's determine this according to the interleave only once */
write_cmd = (cfi->cfiq->P_ID != P_ID_INTEL_PERFORMANCE) ? CMD(0xe8) : CMD(0xe9);

2
drivers/mtd/devices/elm.c
View File

@ -475,6 +475,7 @@ static int elm_context_save(struct elm_info *info)
ELM_SYNDROME_FRAGMENT_1 + offset);
regs->elm_syndrome_fragment_0[i] = elm_read_reg(info,
ELM_SYNDROME_FRAGMENT_0 + offset);
break;
default:
return -EINVAL;
}
@ -520,6 +521,7 @@ static int elm_context_restore(struct elm_info *info)
regs->elm_syndrome_fragment_1[i]);
elm_write_reg(info, ELM_SYNDROME_FRAGMENT_0 + offset,
regs->elm_syndrome_fragment_0[i]);
break;
default:
return -EINVAL;
}

6
drivers/mtd/nand/nand_base.c
View File

@ -4047,8 +4047,10 @@ int nand_scan_tail(struct mtd_info *mtd)
ecc->layout->oobavail += ecc->layout->oobfree[i].length;
mtd->oobavail = ecc->layout->oobavail;
/* ECC sanity check: warn noisily if it's too weak */
WARN_ON(!nand_ecc_strength_good(mtd));
/* ECC sanity check: warn if it's too weak */
if (!nand_ecc_strength_good(mtd))
pr_warn("WARNING: %s: the ECC used on your system is too weak compared to the one required by the NAND chip\n",
mtd->name);
/*
* Set the number of read / write steps for one page depending on ECC