The current NAND_CMD_STATUS handling is weird; it just reads the
WRITE_PROTECT register, and returns NAND_STATUS_WP if it is set.
It does not send Read Status (0x70) command, so it is not helpful
for checking the current device status.
Signed-off-by: Masahiro Yamada <yamada.masah...@socionext.com>
---
Changes in v3: None
Changes in v2:
- Newly added
drivers/mtd/nand/denali.c | 21 +++++----------------
1 file changed, 5 insertions(+), 16 deletions(-)
diff --git a/drivers/mtd/nand/denali.c b/drivers/mtd/nand/denali.c
index 75b045e0..bca4fcd 100644
--- a/drivers/mtd/nand/denali.c
+++ b/drivers/mtd/nand/denali.c
@@ -107,21 +107,6 @@ static void write_byte_to_buf(struct denali_nand_info
*denali, uint8_t byte)
denali->buf.buf[denali->buf.tail++] = byte;
}
-/* reads the status of the device */
-static void read_status(struct denali_nand_info *denali)
-{
- uint32_t cmd;
-
- /* initialize the data buffer to store status */
- reset_buf(denali);
-
- cmd = ioread32(denali->flash_reg + WRITE_PROTECT);
- if (cmd)
- write_byte_to_buf(denali, NAND_STATUS_WP);
- else
- write_byte_to_buf(denali, 0);
-}
-
/* Reset the flash controller */
static uint16_t denali_nand_reset(struct denali_nand_info *denali)
{
@@ -893,7 +878,11 @@ static void denali_cmdfunc(struct mtd_info *mtd, unsigned
int cmd, int col,
switch (cmd) {
case NAND_CMD_STATUS:
- read_status(denali);
+ reset_buf(denali);
+ addr = MODE_11 | BANK(denali->flash_bank);
+ index_addr(denali, addr | 0, cmd);
+ index_addr_read_data(denali, addr | 2, &id);
+ write_byte_to_buf(denali, id);
break;
case NAND_CMD_READID:
case NAND_CMD_PARAM:
--
2.7.4
