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| author | Brian Norris <computersforpeace@gmail.com> | 2010-12-12 00:23:33 -0800 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2011-01-06 15:19:20 +0000 |
| commit | b7b1a29d94c17e4341856381bccb4d17495bea60 (patch) | |
| tree | 855932e331bcbb2f9c2889d879786005552a1f72 /drivers | |
| parent | 0b524fb9314dc852d6a029296545ddbb17709a8b (diff) | |
| download | linux-b7b1a29d94c17e4341856381bccb4d17495bea60.tar.gz linux-b7b1a29d94c17e4341856381bccb4d17495bea60.tar.bz2 linux-b7b1a29d94c17e4341856381bccb4d17495bea60.zip | |
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>
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 c52ded31a12e..5dd7ae4e4b23 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -2865,20 +2865,24 @@ static int nand_flash_detect_onfi(struct mtd_info *mtd, struct nand_chip *chip, /* 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; + } sanitize_string(p->manufacturer, sizeof(p->manufacturer)); sanitize_string(p->model, sizeof(p->model)); |