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Flex-OneNAND driver support 

This patch adds support for Flex-OneNAND devices.

Signed-off-by: Rohit Hagargundgi <h.rohit@samsung.com>
Signed-off-by: Amul Kumar Saha <amul.saha@samsung.com>
This commit is contained in:
Amul Kumar Saha 2009-11-06 17:15:31 +05:30 committed by Scott Wood
parent 35209cbcee
commit cacbe91958
6 changed files with 705 additions and 103 deletions
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746
drivers/mtd/onenand/onenand_base.c
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File diff suppressed because it is too large Load Diff

14
drivers/mtd/onenand/onenand_bbt.c
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@ -69,6 +69,7 @@ static int create_bbt(struct mtd_info *mtd, uint8_t * buf,
loff_t from;
size_t readlen, ooblen;
struct mtd_oob_ops ops;
int rgn;
printk(KERN_INFO "Scanning device for bad blocks\n");
@ -82,7 +83,7 @@ static int create_bbt(struct mtd_info *mtd, uint8_t * buf,
/* Note that numblocks is 2 * (real numblocks) here;
* see i += 2 below as it makses shifting and masking less painful
*/
numblocks = mtd->size >> (bbm->bbt_erase_shift - 1);
numblocks = this->chipsize >> (bbm->bbt_erase_shift - 1);
startblock = 0;
from = 0;
@ -115,7 +116,12 @@ static int create_bbt(struct mtd_info *mtd, uint8_t * buf,
}
}
i += 2;
from += (1 << bbm->bbt_erase_shift);
if (FLEXONENAND(this)) {
rgn = flexonenand_region(mtd, from);
from += mtd->eraseregions[rgn].erasesize;
} else
from += (1 << bbm->bbt_erase_shift);
}
return 0;
@ -152,7 +158,7 @@ static int onenand_isbad_bbt(struct mtd_info *mtd, loff_t offs, int allowbbt)
uint8_t res;
/* Get block number * 2 */
block = (int)(offs >> (bbm->bbt_erase_shift - 1));
block = (int) (onenand_block(this, offs) << 1);
res = (bbm->bbt[block >> 3] >> (block & 0x06)) & 0x03;
MTDDEBUG (MTD_DEBUG_LEVEL2,
@ -191,7 +197,7 @@ int onenand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)
struct bbm_info *bbm = this->bbm;
int len, ret = 0;
len = mtd->size >> (this->erase_shift + 2);
len = this->chipsize >> (this->erase_shift + 2);
/* Allocate memory (2bit per block) */
bbm->bbt = malloc(len);
if (!bbm->bbt) {

4
drivers/mtd/onenand/onenand_uboot.c
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@ -40,8 +40,10 @@ void onenand_init(void)
onenand_scan(&onenand_mtd, 1);
if (onenand_chip.device_id & DEVICE_IS_FLEXONENAND)
puts("Flex-");
puts("OneNAND: ");
print_size(onenand_mtd.size, "\n");
print_size(onenand_chip.chipsize, "\n");
#ifdef CONFIG_MTD_DEVICE
/*

16
include/linux/mtd/onenand.h
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@ -20,8 +20,9 @@
#include <linux/mtd/compat.h>
#include <linux/mtd/bbm.h>
#define MAX_DIES 2
#define MAX_BUFFERRAM 2
#define MAX_ONENAND_PAGESIZE (2048 + 64)
#define MAX_ONENAND_PAGESIZE (4096 + 128)
/* Scan and identify a OneNAND device */
extern int onenand_scan (struct mtd_info *mtd, int max_chips);
@ -39,9 +40,14 @@ struct onenand_bufferram {
/**
* struct onenand_chip - OneNAND Private Flash Chip Data
* @param base [BOARDSPECIFIC] address to access OneNAND
* @dies: [INTERN][FLEXONENAND] number of dies on chip
* @boundary: [INTERN][FLEXONENAND] Boundary of the dies
* @diesize: [INTERN][FLEXONENAND] Size of the dies
* @param chipsize [INTERN] the size of one chip for multichip arrays
* @param device_id [INTERN] device ID
* @param verstion_id [INTERN] version ID
* @technology [INTERN] describes the internal NAND array technology such as SLC or MLC.
* @density_mask: [INTERN] chip density, used for DDP devices
* @param options [BOARDSPECIFIC] various chip options. They can partly be set to inform onenand_scan about
* @param erase_shift [INTERN] number of address bits in a block
* @param page_shift [INTERN] number of address bits in a page
@ -64,9 +70,13 @@ struct onenand_bufferram {
*/
struct onenand_chip {
void __iomem *base;
unsigned int dies;
unsigned int boundary[MAX_DIES];
unsigned int diesize[MAX_DIES];
unsigned int chipsize;
unsigned int device_id;
unsigned int version_id;
unsigned int technology;
unsigned int density_mask;
unsigned int options;
@ -124,6 +134,8 @@ struct onenand_chip {
#define ONENAND_SET_BUFFERRAM0(this) (this->bufferram_index = 0)
#define ONENAND_SET_BUFFERRAM1(this) (this->bufferram_index = 1)
#define FLEXONENAND(this) (this->device_id & DEVICE_IS_FLEXONENAND)
#define ONENAND_IS_MLC(this) (this->technology & ONENAND_TECHNOLOGY_IS_MLC)
#define ONENAND_IS_DDP(this) \
(this->device_id & ONENAND_DEVICE_IS_DDP)
@ -157,4 +169,6 @@ struct onenand_manufacturers {
int onenand_bbt_read_oob(struct mtd_info *mtd, loff_t from,
struct mtd_oob_ops *ops);
unsigned int onenand_block(struct onenand_chip *this, loff_t addr);
int flexonenand_region(struct mtd_info *mtd, loff_t addr);
#endif /* __LINUX_MTD_ONENAND_H */

18
include/linux/mtd/onenand_regs.h
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@ -67,6 +67,9 @@
/*
* Device ID Register F001h (R)
*/
#define DEVICE_IS_FLEXONENAND (1 << 9)
#define FLEXONENAND_PI_MASK (0x3ff)
#define FLEXONENAND_PI_UNLOCK_SHIFT (14)
#define ONENAND_DEVICE_DENSITY_MASK (0xf)
#define ONENAND_DEVICE_DENSITY_SHIFT (4)
#define ONENAND_DEVICE_IS_DDP (1 << 3)
@ -83,6 +86,11 @@
*/
#define ONENAND_VERSION_PROCESS_SHIFT (8)
/*
* Technology Register F006h (R)
*/
#define ONENAND_TECHNOLOGY_IS_MLC (1 << 0)
/*
* Start Address 1 F100h (R/W)
*/
@ -93,7 +101,7 @@
/*
* Start Address 8 F107h (R/W)
*/
#define ONENAND_FPA_MASK (0x3f)
#define ONENAND_FPA_MASK (0x7f)
#define ONENAND_FPA_SHIFT (2)
#define ONENAND_FSA_MASK (0x03)
@ -105,7 +113,7 @@
#define ONENAND_BSA_BOOTRAM (0 << 2)
#define ONENAND_BSA_DATARAM0 (2 << 2)
#define ONENAND_BSA_DATARAM1 (3 << 2)
#define ONENAND_BSC_MASK (0x03)
#define ONENAND_BSC_MASK (0x07)
/*
* Command Register F220h (R/W)
@ -125,9 +133,14 @@
#define ONENAND_CMD_ERASE_VERIFY (0x71)
#define ONENAND_CMD_RESET (0xF0)
#define ONENAND_CMD_READID (0x90)
#define FLEXONENAND_CMD_RESET (0xF3)
#define FLEXONENAND_CMD_PI_UPDATE (0x05)
#define FLEXONENAND_CMD_PI_ACCESS (0x66)
#define FLEXONENAND_CMD_RECOVER_LSB (0x05)
/* NOTE: Those are not *REAL* commands */
#define ONENAND_CMD_BUFFERRAM (0x1978)
#define FLEXONENAND_CMD_READ_PI (0x1985)
/*
* System Configuration 1 Register F221h (R, R/W)
@ -190,5 +203,6 @@
#define ONENAND_ECC_2BIT (1 << 1)
#define ONENAND_ECC_2BIT_ALL (0xAAAA)
#define ONENAND_ECC_4BIT_UNCORRECTABLE (0x1010)
#define FLEXONENAND_UNCORRECTABLE_ERROR (0x1010)
#endif /* __ONENAND_REG_H */

10
include/onenand_uboot.h
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@ -23,6 +23,7 @@ struct erase_info;
struct onenand_chip;
extern struct mtd_info onenand_mtd;
extern struct onenand_chip onenand_chip;
/* board */
extern void onenand_board_init(struct mtd_info *);
@ -38,6 +39,15 @@ extern int onenand_erase(struct mtd_info *mtd, struct erase_info *instr);
extern char *onenand_print_device_info(int device, int version);
extern unsigned onenand_block(struct onenand_chip *this, loff_t addr);
extern loff_t onenand_addr(struct onenand_chip *this, int block);
extern int flexonenand_region(struct mtd_info *mtd, loff_t addr);
extern int flexonenand_set_boundary(struct mtd_info *mtd, int die,
int boundary, int lock);
/* S3C64xx */
extern void s3c64xx_onenand_init(struct mtd_info *);
extern void s3c64xx_set_width_regs(struct onenand_chip *);