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author | Haavard Skinnemoen <haavard.skinnemoen@atmel.com> | 2008-12-17 16:53:07 +0100 |
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committer | Haavard Skinnemoen <haavard.skinnemoen@atmel.com> | 2008-12-17 16:53:07 +0100 |
commit | cb5473205206c7f14cbb1e747f28ec75b48826e2 (patch) | |
tree | 8f4808d60917100b18a10b05230f7638a0a9bbcc /cpu/arm926ejs/davinci/nand.c | |
parent | baf449fc5ff96f071bb0e3789fd3265f6d4fd9a0 (diff) | |
parent | 92c78a3bbcb2ce508b4bf1c4a1e0940406a024bb (diff) | |
download | u-boot-imx-cb5473205206c7f14cbb1e747f28ec75b48826e2.zip u-boot-imx-cb5473205206c7f14cbb1e747f28ec75b48826e2.tar.gz u-boot-imx-cb5473205206c7f14cbb1e747f28ec75b48826e2.tar.bz2 |
Merge branch 'fixes' into cleanups
Conflicts:
board/atmel/atngw100/atngw100.c
board/atmel/atstk1000/atstk1000.c
cpu/at32ap/at32ap700x/gpio.c
include/asm-avr32/arch-at32ap700x/clk.h
include/configs/atngw100.h
include/configs/atstk1002.h
include/configs/atstk1003.h
include/configs/atstk1004.h
include/configs/atstk1006.h
include/configs/favr-32-ezkit.h
include/configs/hammerhead.h
include/configs/mimc200.h
Diffstat (limited to 'cpu/arm926ejs/davinci/nand.c')
-rw-r--r-- | cpu/arm926ejs/davinci/nand.c | 105 |
1 files changed, 88 insertions, 17 deletions
diff --git a/cpu/arm926ejs/davinci/nand.c b/cpu/arm926ejs/davinci/nand.c index 5a1da63..014e2b0 100644 --- a/cpu/arm926ejs/davinci/nand.c +++ b/cpu/arm926ejs/davinci/nand.c @@ -44,14 +44,14 @@ #include <common.h> #include <asm/io.h> -#ifdef CFG_USE_NAND +#ifdef CONFIG_SYS_USE_NAND #if !defined(CONFIG_NAND_LEGACY) #include <nand.h> #include <asm/arch/nand_defs.h> #include <asm/arch/emif_defs.h> -extern struct nand_chip nand_dev_desc[CFG_MAX_NAND_DEVICE]; +extern struct nand_chip nand_dev_desc[CONFIG_SYS_MAX_NAND_DEVICE]; static void nand_davinci_hwcontrol(struct mtd_info *mtd, int cmd, unsigned int ctrl) { @@ -87,8 +87,11 @@ static void nand_davinci_select_chip(struct mtd_info *mtd, int chip) #endif } -#ifdef CFG_NAND_HW_ECC -#ifdef CFG_NAND_LARGEPAGE +#ifdef CONFIG_SYS_NAND_HW_ECC +#ifdef CONFIG_SYS_DAVINCI_BROKEN_ECC +/* Linux-compatible ECC uses MTD defaults. */ +/* These layouts are not compatible with Linux or RBL/UBL. */ +#ifdef CONFIG_SYS_NAND_LARGEPAGE static struct nand_ecclayout davinci_nand_ecclayout = { .eccbytes = 12, .eccpos = {8, 9, 10, 24, 25, 26, 40, 41, 42, 56, 57, 58}, @@ -100,7 +103,7 @@ static struct nand_ecclayout davinci_nand_ecclayout = { {.offset = 60, .length = 4} } }; -#elif defined(CFG_NAND_SMALLPAGE) +#elif defined(CONFIG_SYS_NAND_SMALLPAGE) static struct nand_ecclayout davinci_nand_ecclayout = { .eccbytes = 3, .eccpos = {0, 1, 2}, @@ -110,8 +113,9 @@ static struct nand_ecclayout davinci_nand_ecclayout = { } }; #else -#error "Either CFG_NAND_LARGEPAGE or CFG_NAND_SMALLPAGE must be defined!" +#error "Either CONFIG_SYS_NAND_LARGEPAGE or CONFIG_SYS_NAND_SMALLPAGE must be defined!" #endif +#endif /* CONFIG_SYS_DAVINCI_BROKEN_ECC */ static void nand_davinci_enable_hwecc(struct mtd_info *mtd, int mode) { @@ -150,6 +154,15 @@ static u_int32_t nand_davinci_readecc(struct mtd_info *mtd, u_int32_t region) static int nand_davinci_calculate_ecc(struct mtd_info *mtd, const u_char *dat, u_char *ecc_code) { u_int32_t tmp; +#ifdef CONFIG_SYS_DAVINCI_BROKEN_ECC + /* + * This is not how you should read ECCs on large page Davinci devices. + * The region parameter gets you ECCs for flash chips on different chip + * selects, not the 4x512 byte pages in a 2048 byte page. + * + * Preserved for backwards compatibility though. + */ + int region, n; struct nand_chip *this = mtd->priv; @@ -163,9 +176,26 @@ static int nand_davinci_calculate_ecc(struct mtd_info *mtd, const u_char *dat, u *ecc_code++ = ((tmp >> 8) & 0x0f) | ((tmp >> 20) & 0xf0); region++; } +#else + const int region = 1; + + tmp = nand_davinci_readecc(mtd, region); + + /* Squeeze 4 bytes ECC into 3 bytes by removing RESERVED bits + * and shifting. RESERVED bits are 31 to 28 and 15 to 12. */ + tmp = (tmp & 0x00000fff) | ((tmp & 0x0fff0000) >> 4); + + /* Invert so that erased block ECC is correct */ + tmp = ~tmp; + + *ecc_code++ = tmp; + *ecc_code++ = tmp >> 8; + *ecc_code++ = tmp >> 16; +#endif /* CONFIG_SYS_DAVINCI_BROKEN_ECC */ return(0); } +#ifdef CONFIG_SYS_DAVINCI_BROKEN_ECC static void nand_davinci_gen_true_ecc(u_int8_t *ecc_buf) { u_int32_t tmp = ecc_buf[0] | (ecc_buf[1] << 16) | ((ecc_buf[2] & 0xf0) << 20) | ((ecc_buf[2] & 0x0f) << 8); @@ -282,13 +312,14 @@ static int nand_davinci_compare_ecc(u_int8_t *ecc_nand, u_int8_t *ecc_calc, u_in return(-1); } } +#endif /* CONFIG_SYS_DAVINCI_BROKEN_ECC */ static int nand_davinci_correct_data(struct mtd_info *mtd, u_char *dat, u_char *read_ecc, u_char *calc_ecc) { - struct nand_chip *this; + struct nand_chip *this = mtd->priv; +#ifdef CONFIG_SYS_DAVINCI_BROKEN_ECC int block_count = 0, i, rc; - this = mtd->priv; block_count = (this->ecc.size/512); for (i = 0; i < block_count; i++) { if (memcmp(read_ecc, calc_ecc, 3) != 0) { @@ -301,9 +332,44 @@ static int nand_davinci_correct_data(struct mtd_info *mtd, u_char *dat, u_char * calc_ecc += 3; dat += 512; } +#else + u_int32_t ecc_nand = read_ecc[0] | (read_ecc[1] << 8) | + (read_ecc[2] << 16); + u_int32_t ecc_calc = calc_ecc[0] | (calc_ecc[1] << 8) | + (calc_ecc[2] << 16); + u_int32_t diff = ecc_calc ^ ecc_nand; + + if (diff) { + if ((((diff >> 12) ^ diff) & 0xfff) == 0xfff) { + /* Correctable error */ + if ((diff >> (12 + 3)) < this->ecc.size) { + uint8_t find_bit = 1 << ((diff >> 12) & 7); + uint32_t find_byte = diff >> (12 + 3); + + dat[find_byte] ^= find_bit; + MTDDEBUG(MTD_DEBUG_LEVEL0, "Correcting single " + "bit ECC error at offset: %d, bit: " + "%d\n", find_byte, find_bit); + return 1; + } else { + return -1; + } + } else if (!(diff & (diff - 1))) { + /* Single bit ECC error in the ECC itself, + nothing to fix */ + MTDDEBUG(MTD_DEBUG_LEVEL0, "Single bit ECC error in " + "ECC.\n"); + return 1; + } else { + /* Uncorrectable error */ + MTDDEBUG(MTD_DEBUG_LEVEL0, "ECC UNCORRECTED_ERROR 1\n"); + return -1; + } + } +#endif /* CONFIG_SYS_DAVINCI_BROKEN_ECC */ return(0); } -#endif +#endif /* CONFIG_SYS_NAND_HW_ECC */ static int nand_davinci_dev_ready(struct mtd_info *mtd) { @@ -365,27 +431,32 @@ int board_nand_init(struct nand_chip *nand) nand->IO_ADDR_W = (void __iomem *)NAND_CE0DATA; nand->chip_delay = 0; nand->select_chip = nand_davinci_select_chip; -#ifdef CFG_NAND_USE_FLASH_BBT +#ifdef CONFIG_SYS_NAND_USE_FLASH_BBT nand->options = NAND_USE_FLASH_BBT; #endif -#ifdef CFG_NAND_HW_ECC +#ifdef CONFIG_SYS_NAND_HW_ECC nand->ecc.mode = NAND_ECC_HW; -#ifdef CFG_NAND_LARGEPAGE +#ifdef CONFIG_SYS_DAVINCI_BROKEN_ECC + nand->ecc.layout = &davinci_nand_ecclayout; +#ifdef CONFIG_SYS_NAND_LARGEPAGE nand->ecc.size = 2048; nand->ecc.bytes = 12; -#elif defined(CFG_NAND_SMALLPAGE) +#elif defined(CONFIG_SYS_NAND_SMALLPAGE) nand->ecc.size = 512; nand->ecc.bytes = 3; #else -#error "Either CFG_NAND_LARGEPAGE or CFG_NAND_SMALLPAGE must be defined!" +#error "Either CONFIG_SYS_NAND_LARGEPAGE or CONFIG_SYS_NAND_SMALLPAGE must be defined!" #endif - nand->ecc.layout = &davinci_nand_ecclayout; +#else + nand->ecc.size = 512; + nand->ecc.bytes = 3; +#endif /* CONFIG_SYS_DAVINCI_BROKEN_ECC */ nand->ecc.calculate = nand_davinci_calculate_ecc; nand->ecc.correct = nand_davinci_correct_data; nand->ecc.hwctl = nand_davinci_enable_hwecc; #else nand->ecc.mode = NAND_ECC_SOFT; -#endif +#endif /* CONFIG_SYS_NAND_HW_ECC */ /* Set address of hardware control function */ nand->cmd_ctrl = nand_davinci_hwcontrol; @@ -401,4 +472,4 @@ int board_nand_init(struct nand_chip *nand) #else #error "U-Boot legacy NAND support not available for DaVinci chips" #endif -#endif /* CFG_USE_NAND */ +#endif /* CONFIG_SYS_USE_NAND */ |