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>
diff --git a/drivers/mtd/nand/denali.c b/drivers/mtd/nand/denali.c
index ba3de1a..d9abc7e 100644
--- a/drivers/mtd/nand/denali.c
+++ b/drivers/mtd/nand/denali.c
@@ -1059,9 +1059,8 @@
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 @@
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: