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| author | Masahiro Yamada <yamada.m@jp.panasonic.com> | 2014-10-03 20:03:03 +0900 |
|---|---|---|
| committer | Scott Wood <scottwood@freescale.com> | 2014-10-09 17:33:24 -0500 |
| commit | 05968e7cfd5dcc50cfe51d03d119a5e9d77bd07c (patch) | |
| tree | 3e3b85095f496c7e2edb972316dfd377b29d88cd /drivers | |
| parent | dd0204e48d05f41480743a798b94d5484b664639 (diff) | |
| download | blackbird-obmc-uboot-05968e7cfd5dcc50cfe51d03d119a5e9d77bd07c.tar.gz blackbird-obmc-uboot-05968e7cfd5dcc50cfe51d03d119a5e9d77bd07c.zip | |
mtd: denali: fix NAND_CMD_PARAM command
NAND_CMD_PARAM (0xEC) command is not working on the Denali
NAND controller driver.
Unlike NAND_CMD_READID (0x90), when the NAND_CMD_PARAM command
is followed by an address cycle, the target device goes busy.
(R/B# is deasserted)
Wait until the parameter data are ready.
In addition, unnecessary clear_interrupts() should be removed.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Acked-by: Chin Liang See <clsee@altera.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mtd/nand/denali.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/mtd/nand/denali.c b/drivers/mtd/nand/denali.c index ba3de1a635..d9abc7e1d6 100644 --- a/drivers/mtd/nand/denali.c +++ b/drivers/mtd/nand/denali.c @@ -1059,9 +1059,8 @@ static void denali_cmdfunc(struct mtd_info *mtd, unsigned int cmd, int col, addr = MODE_11 | BANK(denali->flash_bank); index_addr(denali, addr | 0, cmd); break; - case NAND_CMD_PARAM: - clear_interrupts(denali); case NAND_CMD_READID: + case NAND_CMD_PARAM: reset_buf(denali); /* sometimes ManufactureId read from register is not right * e.g. some of Micron MT29F32G08QAA MLC NAND chips @@ -1070,6 +1069,8 @@ static void denali_cmdfunc(struct mtd_info *mtd, unsigned int cmd, int col, addr = MODE_11 | BANK(denali->flash_bank); index_addr(denali, addr | 0, cmd); index_addr(denali, addr | 1, col & 0xFF); + if (cmd == NAND_CMD_PARAM) + udelay(50); break; case NAND_CMD_READ0: case NAND_CMD_SEQIN: |
