mirror of
https://github.com/torvalds/linux.git
synced 2024-12-09 04:31:39 +00:00
b637ef7795
nand_jedec_detect() should return 1 when the PARAM page parsing
succeeds, otherwise the core considers JEDEC detection failed and falls
back to ID-based detection.
Fixes: 480139d922 ("mtd: rawnand: get rid of the JEDEC parameter page in nand_chip")
Cc: <stable@vger.kernel.org>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Acked-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
116 lines
2.8 KiB
C
116 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* Copyright (C) 2000 Steven J. Hill (sjhill@realitydiluted.com)
|
|
* 2002-2006 Thomas Gleixner (tglx@linutronix.de)
|
|
*
|
|
* Credits:
|
|
* David Woodhouse for adding multichip support
|
|
*
|
|
* Aleph One Ltd. and Toby Churchill Ltd. for supporting the
|
|
* rework for 2K page size chips
|
|
*
|
|
* This file contains all ONFI helpers.
|
|
*/
|
|
|
|
#include <linux/slab.h>
|
|
|
|
#include "internals.h"
|
|
|
|
/*
|
|
* Check if the NAND chip is JEDEC compliant, returns 1 if it is, 0 otherwise.
|
|
*/
|
|
int nand_jedec_detect(struct nand_chip *chip)
|
|
{
|
|
struct mtd_info *mtd = nand_to_mtd(chip);
|
|
struct nand_jedec_params *p;
|
|
struct jedec_ecc_info *ecc;
|
|
int jedec_version = 0;
|
|
char id[5];
|
|
int i, val, ret;
|
|
|
|
/* Try JEDEC for unknown chip or LP */
|
|
ret = nand_readid_op(chip, 0x40, id, sizeof(id));
|
|
if (ret || strncmp(id, "JEDEC", sizeof(id)))
|
|
return 0;
|
|
|
|
/* JEDEC chip: allocate a buffer to hold its parameter page */
|
|
p = kzalloc(sizeof(*p), GFP_KERNEL);
|
|
if (!p)
|
|
return -ENOMEM;
|
|
|
|
ret = nand_read_param_page_op(chip, 0x40, NULL, 0);
|
|
if (ret) {
|
|
ret = 0;
|
|
goto free_jedec_param_page;
|
|
}
|
|
|
|
for (i = 0; i < 3; i++) {
|
|
ret = nand_read_data_op(chip, p, sizeof(*p), true);
|
|
if (ret) {
|
|
ret = 0;
|
|
goto free_jedec_param_page;
|
|
}
|
|
|
|
if (onfi_crc16(ONFI_CRC_BASE, (uint8_t *)p, 510) ==
|
|
le16_to_cpu(p->crc))
|
|
break;
|
|
}
|
|
|
|
if (i == 3) {
|
|
pr_err("Could not find valid JEDEC parameter page; aborting\n");
|
|
goto free_jedec_param_page;
|
|
}
|
|
|
|
/* Check version */
|
|
val = le16_to_cpu(p->revision);
|
|
if (val & (1 << 2))
|
|
jedec_version = 10;
|
|
else if (val & (1 << 1))
|
|
jedec_version = 1; /* vendor specific version */
|
|
|
|
if (!jedec_version) {
|
|
pr_info("unsupported JEDEC version: %d\n", val);
|
|
goto free_jedec_param_page;
|
|
}
|
|
|
|
sanitize_string(p->manufacturer, sizeof(p->manufacturer));
|
|
sanitize_string(p->model, sizeof(p->model));
|
|
chip->parameters.model = kstrdup(p->model, GFP_KERNEL);
|
|
if (!chip->parameters.model) {
|
|
ret = -ENOMEM;
|
|
goto free_jedec_param_page;
|
|
}
|
|
|
|
mtd->writesize = le32_to_cpu(p->byte_per_page);
|
|
|
|
/* Please reference to the comment for nand_flash_detect_onfi. */
|
|
mtd->erasesize = 1 << (fls(le32_to_cpu(p->pages_per_block)) - 1);
|
|
mtd->erasesize *= mtd->writesize;
|
|
|
|
mtd->oobsize = le16_to_cpu(p->spare_bytes_per_page);
|
|
|
|
/* Please reference to the comment for nand_flash_detect_onfi. */
|
|
chip->chipsize = 1 << (fls(le32_to_cpu(p->blocks_per_lun)) - 1);
|
|
chip->chipsize *= (uint64_t)mtd->erasesize * p->lun_count;
|
|
chip->bits_per_cell = p->bits_per_cell;
|
|
|
|
if (le16_to_cpu(p->features) & JEDEC_FEATURE_16_BIT_BUS)
|
|
chip->options |= NAND_BUSWIDTH_16;
|
|
|
|
/* ECC info */
|
|
ecc = &p->ecc_info[0];
|
|
|
|
if (ecc->codeword_size >= 9) {
|
|
chip->ecc_strength_ds = ecc->ecc_bits;
|
|
chip->ecc_step_ds = 1 << ecc->codeword_size;
|
|
} else {
|
|
pr_warn("Invalid codeword size\n");
|
|
}
|
|
|
|
ret = 1;
|
|
|
|
free_jedec_param_page:
|
|
kfree(p);
|
|
return ret;
|
|
}
|