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mtd: nand: Store nand ID in struct nand_chip

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Upstream linux commit 7f501f0a72036d.

Store the NAND ID in struct nand_chip to avoid passing id_data and id_len
as function parameters.

Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
This commit is contained in:
Michael Trimarchi 2022-07-20 18:22:05 +02:00
parent 1ca6f9483e
commit bd87603d5a
2 changed files with 44 additions and 29 deletions
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56
drivers/mtd/nand/raw/nand_base.c
View File

@ -4160,16 +4160,14 @@ static int nand_get_bits_per_cell(u8 cellinfo)
* chip. The rest of the parameters must be decoded according to generic or * chip. The rest of the parameters must be decoded according to generic or
* manufacturer-specific "extended ID" decoding patterns. * manufacturer-specific "extended ID" decoding patterns.
*/ */
static void nand_decode_ext_id(struct mtd_info *mtd, struct nand_chip *chip, static void nand_decode_ext_id(struct mtd_info *mtd, struct nand_chip *chip)
u8 id_data[8])
{ {
int extid, id_len; int extid, id_len;
/* The 3rd id byte holds MLC / multichip data */ /* The 3rd id byte holds MLC / multichip data */
chip->bits_per_cell = nand_get_bits_per_cell(id_data[2]); chip->bits_per_cell = nand_get_bits_per_cell(chip->id.data[2]);
/* The 4th id byte is the important one */ /* The 4th id byte is the important one */
extid = id_data[3]; extid = chip->id.data[3];
id_len = chip->id.len;
id_len = nand_id_len(id_data, 8);
/* /*
* Field definitions are in the following datasheets: * Field definitions are in the following datasheets:
@ -4180,8 +4178,8 @@ static void nand_decode_ext_id(struct mtd_info *mtd, struct nand_chip *chip,
* Check for ID length, non-zero 6th byte, cell type, and Hynix/Samsung * Check for ID length, non-zero 6th byte, cell type, and Hynix/Samsung
* ID to decide what to do. * ID to decide what to do.
*/ */
if (id_len == 6 && id_data[0] == NAND_MFR_SAMSUNG && if (id_len == 6 && chip->id.data[0] == NAND_MFR_SAMSUNG &&
!nand_is_slc(chip) && id_data[5] != 0x00) { !nand_is_slc(chip) && chip->id.data[5] != 0x00) {
/* Calc pagesize */ /* Calc pagesize */
mtd->writesize = 2048 << (extid & 0x03); mtd->writesize = 2048 << (extid & 0x03);
extid >>= 2; extid >>= 2;
@ -4214,7 +4212,7 @@ static void nand_decode_ext_id(struct mtd_info *mtd, struct nand_chip *chip,
/* Calc blocksize */ /* Calc blocksize */
mtd->erasesize = (128 * 1024) << mtd->erasesize = (128 * 1024) <<
(((extid >> 1) & 0x04) | (extid & 0x03)); (((extid >> 1) & 0x04) | (extid & 0x03));
} else if (id_len == 6 && id_data[0] == NAND_MFR_HYNIX && } else if (id_len == 6 && chip->id.data[0] == NAND_MFR_HYNIX &&
!nand_is_slc(chip)) { !nand_is_slc(chip)) {
unsigned int tmp; unsigned int tmp;
@ -4278,10 +4276,10 @@ static void nand_decode_ext_id(struct mtd_info *mtd, struct nand_chip *chip,
* 110b -> 24nm * 110b -> 24nm
* - ID byte 5, bit[7]: 1 -> BENAND, 0 -> raw SLC * - ID byte 5, bit[7]: 1 -> BENAND, 0 -> raw SLC
*/ */
if (id_len >= 6 && id_data[0] == NAND_MFR_TOSHIBA && if (id_len >= 6 && chip->id.data[0] == NAND_MFR_TOSHIBA &&
nand_is_slc(chip) && nand_is_slc(chip) &&
(id_data[5] & 0x7) == 0x6 /* 24nm */ && (chip->id.data[5] & 0x7) == 0x6 /* 24nm */ &&
!(id_data[4] & 0x80) /* !BENAND */) { !(chip->id.data[4] & 0x80) /* !BENAND */) {
mtd->oobsize = 32 * mtd->writesize >> 9; mtd->oobsize = 32 * mtd->writesize >> 9;
} }
@ -4294,9 +4292,9 @@ static void nand_decode_ext_id(struct mtd_info *mtd, struct nand_chip *chip,
* the chip. * the chip.
*/ */
static void nand_decode_id(struct mtd_info *mtd, struct nand_chip *chip, static void nand_decode_id(struct mtd_info *mtd, struct nand_chip *chip,
struct nand_flash_dev *type, u8 id_data[8]) struct nand_flash_dev *type)
{ {
int maf_id = id_data[0]; int maf_id = chip->id.data[0];
mtd->erasesize = type->erasesize; mtd->erasesize = type->erasesize;
mtd->writesize = type->pagesize; mtd->writesize = type->pagesize;
@ -4311,11 +4309,11 @@ static void nand_decode_id(struct mtd_info *mtd, struct nand_chip *chip,
* listed in nand_ids table. * listed in nand_ids table.
* Data sheet (5 byte ID): Spansion S30ML-P ORNAND (p.39) * Data sheet (5 byte ID): Spansion S30ML-P ORNAND (p.39)
*/ */
if (maf_id == NAND_MFR_AMD && id_data[4] != 0x00 && id_data[5] == 0x00 if (maf_id == NAND_MFR_AMD && chip->id.data[4] != 0x00 &&
&& id_data[6] == 0x00 && id_data[7] == 0x00 chip->id.data[5] == 0x00 && chip->id.data[6] == 0x00 &&
&& mtd->writesize == 512) { chip->id.data[7] == 0x00 && mtd->writesize == 512) {
mtd->erasesize = 128 * 1024; mtd->erasesize = 128 * 1024;
mtd->erasesize <<= ((id_data[3] & 0x03) << 1); mtd->erasesize <<= ((chip->id.data[3] & 0x03) << 1);
} }
} }
@ -4325,9 +4323,9 @@ static void nand_decode_id(struct mtd_info *mtd, struct nand_chip *chip,
* page size, cell-type information). * page size, cell-type information).
*/ */
static void nand_decode_bbm_options(struct mtd_info *mtd, static void nand_decode_bbm_options(struct mtd_info *mtd,
struct nand_chip *chip, u8 id_data[8]) struct nand_chip *chip)
{ {
int maf_id = id_data[0]; int maf_id = chip->id.data[0];
/* Set the bad block position */ /* Set the bad block position */
if (mtd->writesize > 512 || (chip->options & NAND_BUSWIDTH_16)) if (mtd->writesize > 512 || (chip->options & NAND_BUSWIDTH_16))
@ -4362,14 +4360,14 @@ static inline bool is_full_id_nand(struct nand_flash_dev *type)
} }
static bool find_full_id_nand(struct mtd_info *mtd, struct nand_chip *chip, static bool find_full_id_nand(struct mtd_info *mtd, struct nand_chip *chip,
struct nand_flash_dev *type, u8 *id_data) struct nand_flash_dev *type)
{ {
if (!strncmp((char *)type->id, (char *)id_data, type->id_len)) { if (!strncmp((char *)type->id, (char *)chip->id.data, type->id_len)) {
mtd->writesize = type->pagesize; mtd->writesize = type->pagesize;
mtd->erasesize = type->erasesize; mtd->erasesize = type->erasesize;
mtd->oobsize = type->oobsize; mtd->oobsize = type->oobsize;
chip->bits_per_cell = nand_get_bits_per_cell(id_data[2]); chip->bits_per_cell = nand_get_bits_per_cell(chip->id.data[2]);
chip->chipsize = (uint64_t)type->chipsize << 20; chip->chipsize = (uint64_t)type->chipsize << 20;
chip->options |= type->options; chip->options |= type->options;
chip->ecc_strength_ds = NAND_ECC_STRENGTH(type); chip->ecc_strength_ds = NAND_ECC_STRENGTH(type);
@ -4395,7 +4393,7 @@ struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
{ {
int busw, ret; int busw, ret;
int maf_idx; int maf_idx;
u8 id_data[8]; u8 *id_data = chip->id.data;
/* /*
* Reset the chip, required by some chips (e.g. Micron MT29FxGxxxxx) * Reset the chip, required by some chips (e.g. Micron MT29FxGxxxxx)
@ -4453,9 +4451,11 @@ struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
*/ */
chip->options &= ~NAND_BUSWIDTH_16; chip->options &= ~NAND_BUSWIDTH_16;
chip->id.len = nand_id_len(id_data, ARRAY_SIZE(chip->id.data));
for (; type->name != NULL; type++) { for (; type->name != NULL; type++) {
if (is_full_id_nand(type)) { if (is_full_id_nand(type)) {
if (find_full_id_nand(mtd, chip, type, id_data)) if (find_full_id_nand(mtd, chip, type))
goto ident_done; goto ident_done;
} else if (*dev_id == type->dev_id) { } else if (*dev_id == type->dev_id) {
break; break;
@ -4483,9 +4483,9 @@ struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
if (!type->pagesize) { if (!type->pagesize) {
/* Decode parameters from extended ID */ /* Decode parameters from extended ID */
nand_decode_ext_id(mtd, chip, id_data); nand_decode_ext_id(mtd, chip);
} else { } else {
nand_decode_id(mtd, chip, type, id_data); nand_decode_id(mtd, chip, type);
} }
/* Get chip options */ /* Get chip options */
@ -4523,7 +4523,7 @@ ident_done:
return ERR_PTR(-EINVAL); return ERR_PTR(-EINVAL);
} }
nand_decode_bbm_options(mtd, chip, id_data); nand_decode_bbm_options(mtd, chip);
/* Calculate the address shift from the page size */ /* Calculate the address shift from the page size */
chip->page_shift = ffs(mtd->writesize) - 1; chip->page_shift = ffs(mtd->writesize) - 1;

15
include/linux/mtd/rawnand.h
View File

@ -507,6 +507,19 @@ static inline void nand_hw_control_init(struct nand_hw_control *nfc)
init_waitqueue_head(&nfc->wq); init_waitqueue_head(&nfc->wq);
} }
/* The maximum expected count of bytes in the NAND ID sequence */
#define NAND_MAX_ID_LEN 8
/**
* struct nand_id - NAND id structure
* @data: buffer containing the id bytes.
* @len: ID length.
*/
struct nand_id {
u8 data[NAND_MAX_ID_LEN];
int len;
};
/** /**
* struct nand_ecc_step_info - ECC step information of ECC engine * struct nand_ecc_step_info - ECC step information of ECC engine
* @stepsize: data bytes per ECC step * @stepsize: data bytes per ECC step
@ -888,6 +901,8 @@ nand_get_sdr_timings(const struct nand_data_interface *conf)
struct nand_chip { struct nand_chip {
struct mtd_info mtd; struct mtd_info mtd;
struct nand_id id;
void __iomem *IO_ADDR_R; void __iomem *IO_ADDR_R;
void __iomem *IO_ADDR_W; void __iomem *IO_ADDR_W;