diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mtd/nand/atmel_nand.c | 144 |
1 files changed, 86 insertions, 58 deletions
diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c index de66382..f8b38f7 100644 --- a/drivers/mtd/nand/atmel_nand.c +++ b/drivers/mtd/nand/atmel_nand.c @@ -232,6 +232,60 @@ static int atmel_nand_correct(struct mtd_info *mtd, u_char *dat, static void atmel_nand_hwctl(struct mtd_info *mtd, int mode) { } + +int atmel_hwecc_nand_init_param(struct nand_chip *nand, struct mtd_info *mtd) +{ + nand->ecc.mode = NAND_ECC_HW; + nand->ecc.calculate = atmel_nand_calculate; + nand->ecc.correct = atmel_nand_correct; + nand->ecc.hwctl = atmel_nand_hwctl; + nand->ecc.read_page = atmel_nand_read_page; + nand->ecc.bytes = 4; + + if (nand->ecc.mode == NAND_ECC_HW) { + /* ECC is calculated for the whole page (1 step) */ + nand->ecc.size = mtd->writesize; + + /* set ECC page size and oob layout */ + switch (mtd->writesize) { + case 512: + nand->ecc.layout = &atmel_oobinfo_small; + ecc_writel(CONFIG_SYS_NAND_ECC_BASE, MR, + ATMEL_ECC_PAGESIZE_528); + break; + case 1024: + nand->ecc.layout = &atmel_oobinfo_large; + ecc_writel(CONFIG_SYS_NAND_ECC_BASE, MR, + ATMEL_ECC_PAGESIZE_1056); + break; + case 2048: + nand->ecc.layout = &atmel_oobinfo_large; + ecc_writel(CONFIG_SYS_NAND_ECC_BASE, MR, + ATMEL_ECC_PAGESIZE_2112); + break; + case 4096: + nand->ecc.layout = &atmel_oobinfo_large; + ecc_writel(CONFIG_SYS_NAND_ECC_BASE, MR, + ATMEL_ECC_PAGESIZE_4224); + break; + default: + /* page size not handled by HW ECC */ + /* switching back to soft ECC */ + nand->ecc.mode = NAND_ECC_SOFT; + nand->ecc.calculate = NULL; + nand->ecc.correct = NULL; + nand->ecc.hwctl = NULL; + nand->ecc.read_page = NULL; + nand->ecc.postpad = 0; + nand->ecc.prepad = 0; + nand->ecc.bytes = 0; + break; + } + } + + return 0; +} + #endif static void at91_nand_hwcontrol(struct mtd_info *mtd, @@ -267,12 +321,20 @@ static int at91_nand_ready(struct mtd_info *mtd) } #endif -int board_nand_init(struct nand_chip *nand) -{ -#ifdef CONFIG_ATMEL_NAND_HWECC - static int chip_nr = 0; - struct mtd_info *mtd; +#ifndef CONFIG_SYS_NAND_BASE_LIST +#define CONFIG_SYS_NAND_BASE_LIST { CONFIG_SYS_NAND_BASE } #endif +static struct nand_chip nand_chip[CONFIG_SYS_MAX_NAND_DEVICE]; +static ulong base_addr[CONFIG_SYS_MAX_NAND_DEVICE] = CONFIG_SYS_NAND_BASE_LIST; + +int atmel_nand_chip_init(int devnum, ulong base_addr) +{ + int ret; + struct mtd_info *mtd = &nand_info[devnum]; + struct nand_chip *nand = &nand_chip[devnum]; + + mtd->priv = nand; + nand->IO_ADDR_R = nand->IO_ADDR_W = (void __iomem *)base_addr; nand->ecc.mode = NAND_ECC_SOFT; #ifdef CONFIG_SYS_NAND_DBW_16 @@ -284,62 +346,28 @@ int board_nand_init(struct nand_chip *nand) #endif nand->chip_delay = 20; -#ifdef CONFIG_ATMEL_NAND_HWECC - nand->ecc.mode = NAND_ECC_HW; - nand->ecc.calculate = atmel_nand_calculate; - nand->ecc.correct = atmel_nand_correct; - nand->ecc.hwctl = atmel_nand_hwctl; - nand->ecc.read_page = atmel_nand_read_page; - nand->ecc.bytes = 4; -#endif + ret = nand_scan_ident(mtd, CONFIG_SYS_NAND_MAX_CHIPS, NULL); + if (ret) + return ret; #ifdef CONFIG_ATMEL_NAND_HWECC - mtd = &nand_info[chip_nr++]; - mtd->priv = nand; - - /* Detect NAND chips */ - if (nand_scan_ident(mtd, 1, NULL)) { - printk(KERN_WARNING "NAND Flash not found !\n"); - return -ENXIO; - } + ret = atmel_hwecc_nand_init_param(nand, mtd); + if (ret) + return ret; +#endif - if (nand->ecc.mode == NAND_ECC_HW) { - /* ECC is calculated for the whole page (1 step) */ - nand->ecc.size = mtd->writesize; + ret = nand_scan_tail(mtd); + if (!ret) + nand_register(devnum); - /* set ECC page size and oob layout */ - switch (mtd->writesize) { - case 512: - nand->ecc.layout = &atmel_oobinfo_small; - ecc_writel(CONFIG_SYS_NAND_ECC_BASE, MR, ATMEL_ECC_PAGESIZE_528); - break; - case 1024: - nand->ecc.layout = &atmel_oobinfo_large; - ecc_writel(CONFIG_SYS_NAND_ECC_BASE, MR, ATMEL_ECC_PAGESIZE_1056); - break; - case 2048: - nand->ecc.layout = &atmel_oobinfo_large; - ecc_writel(CONFIG_SYS_NAND_ECC_BASE, MR, ATMEL_ECC_PAGESIZE_2112); - break; - case 4096: - nand->ecc.layout = &atmel_oobinfo_large; - ecc_writel(CONFIG_SYS_NAND_ECC_BASE, MR, ATMEL_ECC_PAGESIZE_4224); - break; - default: - /* page size not handled by HW ECC */ - /* switching back to soft ECC */ - nand->ecc.mode = NAND_ECC_SOFT; - nand->ecc.calculate = NULL; - nand->ecc.correct = NULL; - nand->ecc.hwctl = NULL; - nand->ecc.read_page = NULL; - nand->ecc.postpad = 0; - nand->ecc.prepad = 0; - nand->ecc.bytes = 0; - break; - } - } -#endif + return ret; +} - return 0; +void board_nand_init(void) +{ + int i; + for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++) + if (atmel_nand_chip_init(i, base_addr[i])) + printk(KERN_ERR "atmel_nand: Fail to initialize #%d chip", + i); } |