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| author | Stefan Roese <sr@denx.de> | 2008-06-16 10:40:02 +0200 |
|---|---|---|
| committer | Stefan Roese <sr@denx.de> | 2008-06-19 15:08:17 +0200 |
| commit | fb8c061ea05fc68d37e2a8b9f8c949d76c8d71a8 (patch) | |
| tree | 774181d048622d693b0ec16ead3293ecd602eb0b /drivers | |
| parent | a94f22f08f280905926219e568568964cb9eeb9d (diff) | |
| download | u-boot-imx-fb8c061ea05fc68d37e2a8b9f8c949d76c8d71a8.zip u-boot-imx-fb8c061ea05fc68d37e2a8b9f8c949d76c8d71a8.tar.gz u-boot-imx-fb8c061ea05fc68d37e2a8b9f8c949d76c8d71a8.tar.bz2 | |
cfi-flash: Fix problem in flash_toggle(), busy was not detected reliably
This patch simplifies flash_toggle() (AMD commandset), which is used to
detect if a FLASH device is still busy with erase/program operations. On
800MHz Canyonlands/Glacier boards (460EX/GT) the current implementation
did not detect the busy state reliably, resulting in non erased sectors
etc. This patch now simplifies this function by "just" comparing the
complete data-word instead of ANDing it with the command-word (0x40)
before the compatison. It is done the same way in the Linux implementation
chip_ready() in cfi_cmdset_0002.c.
Signed-off-by: Stefan Roese <sr@denx.de>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mtd/cfi_flash.c | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/drivers/mtd/cfi_flash.c b/drivers/mtd/cfi_flash.c index d505bc8..c0ea97b 100644 --- a/drivers/mtd/cfi_flash.c +++ b/drivers/mtd/cfi_flash.c @@ -581,20 +581,16 @@ static int flash_toggle (flash_info_t * info, flash_sect_t sect, flash_make_cmd (info, cmd, &cword); switch (info->portwidth) { case FLASH_CFI_8BIT: - retval = ((flash_read8(addr) & cword.c) != - (flash_read8(addr) & cword.c)); + retval = flash_read8(addr) != flash_read8(addr); break; case FLASH_CFI_16BIT: - retval = ((flash_read16(addr) & cword.w) != - (flash_read16(addr) & cword.w)); + retval = flash_read16(addr) != flash_read16(addr); break; case FLASH_CFI_32BIT: - retval = ((flash_read32(addr) & cword.l) != - (flash_read32(addr) & cword.l)); + retval = flash_read32(addr) != flash_read32(addr); break; case FLASH_CFI_64BIT: - retval = ((flash_read64(addr) & cword.ll) != - (flash_read64(addr) & cword.ll)); + retval = flash_read64(addr) != flash_read64(addr); break; default: retval = 0; |