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drivers: mtd: nand: cadence: Add support for NAND_CMD_PARAM

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Add support for reading param page of NAND device.
These paramaters are unique and used for identification purpose.

Signed-off-by: Dinesh Maniyam <dinesh.maniyam@intel.com>
This commit is contained in:
Dinesh Maniyam
2025-03-15 10:35:00 +01:00
committed by Michael Trimarchi
parent 1d23aca355
commit 5045ab8bd3
1 changed files with 29 additions and 0 deletions
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drivers/mtd/nand/raw/cadence_nand.c
+29
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@@ -1970,6 +1970,30 @@ static int cadence_nand_readid(struct mtd_info *mtd, int offset_in_page, unsigne
return 0;
}
static int cadence_nand_param(struct mtd_info *mtd, u8 offset_in_page, unsigned int command)
{
struct nand_chip *chip = mtd_to_nand(mtd);
int ret = 0;
ret = cadence_nand_cmd_opcode(chip, command);
if (ret)
return ret;
ret = cadence_nand_cmd_address(chip, ONE_CYCLE, &offset_in_page);
if (ret)
return ret;
ret = cadence_nand_waitfunc(mtd, chip);
if (ret)
return ret;
ret = cadence_nand_cmd_data(chip, sizeof(struct nand_jedec_params), GCMD_DIR_READ);
if (ret)
return ret;
return 0;
}
static void cadence_nand_cmdfunc(struct mtd_info *mtd, unsigned int command,
int offset_in_page, int page)
{
@@ -1987,6 +2011,9 @@ static void cadence_nand_cmdfunc(struct mtd_info *mtd, unsigned int command,
ret = cadence_nand_readid(mtd, offset_in_page, command);
break;
case NAND_CMD_PARAM:
ret = cadence_nand_param(mtd, offset_in_page, command);
break;
/*
* ecc will override other command for read, write and erase
*/
@@ -2021,6 +2048,8 @@ static u8 cadence_nand_read_byte(struct mtd_info *mtd)
if (cadence->buf_index == 0) {
if (cadence->cmd == NAND_CMD_READID)
size = 8;
else if (cadence->cmd == NAND_CMD_PARAM)
size = sizeof(struct nand_jedec_params);
cadence_nand_read_buf(mtd, &cadence->buf[0], size);
}