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// SPDX-License-Identifier: GPL-2.0
/*
* Author:
* Chuanhong Guo <gch981213@gmail.com> - the main driver logic
* Martin Kurbanov <mmkurbanov@sberdevices.ru> - OOB layout
*/
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/mtd/spinand.h>
#include <linux/spi/spi-mem.h>
/* ESMT uses GigaDevice 0xc8 JECDEC ID on some SPI NANDs */
#define SPINAND_MFR_ESMT_C8 0xc8
#define ESMT_F50L1G41LB_CFG_OTP_PROTECT BIT(7)
#define ESMT_F50L1G41LB_CFG_OTP_LOCK \
(CFG_OTP_ENABLE | ESMT_F50L1G41LB_CFG_OTP_PROTECT)
static SPINAND_OP_VARIANTS(read_cache_variants,
SPINAND_PAGE_READ_FROM_CACHE_X4_OP(0, 1, NULL, 0),
SPINAND_PAGE_READ_FROM_CACHE_X2_OP(0, 1, NULL, 0),
SPINAND_PAGE_READ_FROM_CACHE_FAST_OP(0, 1, NULL, 0),
SPINAND_PAGE_READ_FROM_CACHE_OP(0, 1, NULL, 0));
static SPINAND_OP_VARIANTS(write_cache_variants,
SPINAND_PROG_LOAD_X4(true, 0, NULL, 0),
SPINAND_PROG_LOAD(true, 0, NULL, 0));
static SPINAND_OP_VARIANTS(update_cache_variants,
SPINAND_PROG_LOAD_X4(false, 0, NULL, 0),
SPINAND_PROG_LOAD(false, 0, NULL, 0));
/*
* OOB spare area map (64 bytes)
*
* Bad Block Markers
* filled by HW and kernel Reserved
* | +-----------------------+-----------------------+
* | | | |
* | | OOB free data Area |non ECC protected |
* | +-------------|-----+-----------------|-----+-----------------|-----+
* | | | | | | | |
* +-|---|----------+--|-----|--------------+--|-----|--------------+--|-----|--------------+
* | | | section0 | | | section1 | | | section2 | | | section3 |
* +-v-+-v-+---+----+--v--+--v--+-----+-----+--v--+--v--+-----+-----+--v--+--v--+-----+-----+
* | | | | | | | | | | | | | | | | |
* |0:1|2:3|4:7|8:15|16:17|18:19|20:23|24:31|32:33|34:35|36:39|40:47|48:49|50:51|52:55|56:63|
* | | | | | | | | | | | | | | | | |
* +---+---+-^-+--^-+-----+-----+--^--+--^--+-----+-----+--^--+--^--+-----+-----+--^--+--^--+
* | | | | | | | |
* | +----------------|-----+-----------------|-----+-----------------|-----+
* | ECC Area|(Main + Spare) - filled|by ESMT NAND HW |
* | | | |
* +---------------------+-----------------------+-----------------------+
* OOB ECC protected Area - not used due to
* partial programming from some filesystems
* (like JFFS2 with cleanmarkers)
*/
#define ESMT_OOB_SECTION_COUNT 4
#define ESMT_OOB_SECTION_SIZE(nand) \
(nanddev_per_page_oobsize(nand) / ESMT_OOB_SECTION_COUNT)
#define ESMT_OOB_FREE_SIZE(nand) \
(ESMT_OOB_SECTION_SIZE(nand) / 2)
#define ESMT_OOB_ECC_SIZE(nand) \
(ESMT_OOB_SECTION_SIZE(nand) - ESMT_OOB_FREE_SIZE(nand))
#define ESMT_OOB_BBM_SIZE 2
static int f50l1g41lb_ooblayout_ecc(struct mtd_info *mtd, int section,
struct mtd_oob_region *region)
{
struct nand_device *nand = mtd_to_nanddev(mtd);
if (section >= ESMT_OOB_SECTION_COUNT)
return -ERANGE;
region->offset = section * ESMT_OOB_SECTION_SIZE(nand) +
ESMT_OOB_FREE_SIZE(nand);
region->length = ESMT_OOB_ECC_SIZE(nand);
return 0;
}
static int f50l1g41lb_ooblayout_free(struct mtd_info *mtd, int section,
struct mtd_oob_region *region)
{
struct nand_device *nand = mtd_to_nanddev(mtd);
if (section >= ESMT_OOB_SECTION_COUNT)
return -ERANGE;
/*
* Reserve space for bad blocks markers (section0) and
* reserved bytes (sections 1-3)
*/
region->offset = section * ESMT_OOB_SECTION_SIZE(nand) + 2;
/* Use only 2 non-protected ECC bytes per each OOB section */
region->length = 2;
return 0;
}
static const struct mtd_ooblayout_ops f50l1g41lb_ooblayout = {
.ecc = f50l1g41lb_ooblayout_ecc,
.free = f50l1g41lb_ooblayout_free,
};
static int f50l1g41lb_otp_info(struct spinand_device *spinand, size_t len,
struct otp_info *buf, size_t *retlen, bool user)
{
if (len < sizeof(*buf))
return -EINVAL;
buf->locked = 0;
buf->start = 0;
buf->length = user ? spinand_user_otp_size(spinand) :
spinand_fact_otp_size(spinand);
*retlen = sizeof(*buf);
return 0;
}
static int f50l1g41lb_fact_otp_info(struct spinand_device *spinand, size_t len,
struct otp_info *buf, size_t *retlen)
{
return f50l1g41lb_otp_info(spinand, len, buf, retlen, false);
}
static int f50l1g41lb_user_otp_info(struct spinand_device *spinand, size_t len,
struct otp_info *buf, size_t *retlen)
{
return f50l1g41lb_otp_info(spinand, len, buf, retlen, true);
}
static int f50l1g41lb_otp_lock(struct spinand_device *spinand, loff_t from,
size_t len)
{
struct spi_mem_op write_op = SPINAND_WR_EN_DIS_OP(true);
struct spi_mem_op exec_op = SPINAND_PROG_EXEC_OP(0);
u8 status;
int ret;
ret = spinand_upd_cfg(spinand, ESMT_F50L1G41LB_CFG_OTP_LOCK,
ESMT_F50L1G41LB_CFG_OTP_LOCK);
if (!ret)
return ret;
ret = spi_mem_exec_op(spinand->spimem, &write_op);
if (!ret)
goto out;
ret = spi_mem_exec_op(spinand->spimem, &exec_op);
if (!ret)
goto out;
ret = spinand_wait(spinand,
SPINAND_WRITE_INITIAL_DELAY_US,
SPINAND_WRITE_POLL_DELAY_US,
&status);
if (!ret && (status & STATUS_PROG_FAILED))
ret = -EIO;
out:
if (spinand_upd_cfg(spinand, ESMT_F50L1G41LB_CFG_OTP_LOCK, 0)) {
dev_warn(&spinand_to_mtd(spinand)->dev,
"Can not disable OTP mode\n");
ret = -EIO;
}
return ret;
}
static const struct spinand_user_otp_ops f50l1g41lb_user_otp_ops = {
.info = f50l1g41lb_user_otp_info,
.lock = f50l1g41lb_otp_lock,
.read = spinand_user_otp_read,
.write = spinand_user_otp_write,
};
static const struct spinand_fact_otp_ops f50l1g41lb_fact_otp_ops = {
.info = f50l1g41lb_fact_otp_info,
.read = spinand_fact_otp_read,
};
static const struct spinand_info esmt_c8_spinand_table[] = {
SPINAND_INFO("F50L1G41LB",
SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x01, 0x7f,
0x7f, 0x7f),
NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
NAND_ECCREQ(1, 512),
SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
&write_cache_variants,
&update_cache_variants),
0,
SPINAND_ECCINFO(&f50l1g41lb_ooblayout, NULL),
SPINAND_USER_OTP_INFO(28, 2, &f50l1g41lb_user_otp_ops),
SPINAND_FACT_OTP_INFO(2, 0, &f50l1g41lb_fact_otp_ops)),
SPINAND_INFO("F50D1G41LB",
SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x11, 0x7f,
0x7f, 0x7f),
NAND_MEMORG(1, 2048, 64, 64, 1024, 20, 1, 1, 1),
NAND_ECCREQ(1, 512),
SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
&write_cache_variants,
&update_cache_variants),
0,
SPINAND_ECCINFO(&f50l1g41lb_ooblayout, NULL),
SPINAND_USER_OTP_INFO(28, 2, &f50l1g41lb_user_otp_ops),
SPINAND_FACT_OTP_INFO(2, 0, &f50l1g41lb_fact_otp_ops)),
SPINAND_INFO("F50D2G41KA",
SPINAND_ID(SPINAND_READID_METHOD_OPCODE_ADDR, 0x51, 0x7f,
0x7f, 0x7f),
NAND_MEMORG(1, 2048, 128, 64, 2048, 40, 1, 1, 1),
NAND_ECCREQ(8, 512),
SPINAND_INFO_OP_VARIANTS(&read_cache_variants,
&write_cache_variants,
&update_cache_variants),
0,
SPINAND_ECCINFO(&f50l1g41lb_ooblayout, NULL)),
};
static const struct spinand_manufacturer_ops esmt_spinand_manuf_ops = {
};
const struct spinand_manufacturer esmt_c8_spinand_manufacturer = {
.id = SPINAND_MFR_ESMT_C8,
.name = "ESMT",
.chips = esmt_c8_spinand_table,
.nchips = ARRAY_SIZE(esmt_c8_spinand_table),
.ops = &esmt_spinand_manuf_ops,
};
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