diff options
| author | Florian Fainelli <florian@openwrt.org> | 2011-04-03 18:23:56 +0200 |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2011-04-15 15:53:11 -0500 |
| commit | aad99bbc396a2e3b2913adcb02ed61d6d7e0f1ec (patch) | |
| tree | 7c0200e8d07fa010dd5af573070c74d501b666c6 /drivers | |
| parent | a931f49296fa2406abf3c21ea97697513571b7fb (diff) | |
NAND: rearrange ONFI revision checking, add ONFI 2.3
This patch sync with Brian's patch on Linux in nand_flash_detect_onfi()
commit b7b1a29d94c17e4341856381bccb4d17495bea60
Author: Brian Norris <computersforpeace@gmail.com>
Date: Sun Dec 12 00:23:33 2010 -0800
mtd: nand: rearrange ONFI revision checking, add ONFI 2.3
In checking for the ONFI revision, the first conditional (for checking
"unsupported" ONFI) seems unnecessary. All ONFI revisions should be
backwards-compatible; even if this is not the case on some newer ONFI
revision, it should simply fail the second version-checking if-else block
(i.e., the bit-fields for 1.0, 2.0, etc. would not be set to 1). Thus, we
move our "unsupported" condition after having checked each bit field.
Also, it's simple enough to add a condition for ONFI revision 2.3. Note
that this does *NOT* mean we handle all new features of ONFI versions
above 1.0.
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Florian Fainelli <ffainelli@freebox.fr>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mtd/nand/nand_base.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index 3cb92c19c2b..52f8575aac6 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -2461,20 +2461,24 @@ static int nand_flash_detect_onfi(struct mtd_info *mtd, /* check version */ val = le16_to_cpu(p->revision); - if (val == 1 || val > (1 << 4)) { - printk(KERN_INFO "%s: unsupported ONFI " - "version: %d\n", __func__, val); - return 0; - } - - if (val & (1 << 4)) + if (val & (1 << 5)) + chip->onfi_version = 23; + else if (val & (1 << 4)) chip->onfi_version = 22; else if (val & (1 << 3)) chip->onfi_version = 21; else if (val & (1 << 2)) chip->onfi_version = 20; - else + else if (val & (1 << 1)) chip->onfi_version = 10; + else + chip->onfi_version = 0; + + if (!chip->onfi_version) { + printk(KERN_INFO "%s: unsupported ONFI " + "version: %d\n", __func__, val); + return 0; + } if (!mtd->name) mtd->name = p->model; |