X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=drivers%2Fmtd%2Fnand%2Fomap_gpmc.c;h=610f9698e15b99dd4b662c8495ba809d05acaba2;hb=b050898efa6b4f0272f12885a7365f044ab4c08e;hp=bf99b8e6759c1b0c6ad2c126fc75c322c9364322;hpb=a26acb7dc946b2fe7fa25736928878f6adf88f46;p=u-boot diff --git a/drivers/mtd/nand/omap_gpmc.c b/drivers/mtd/nand/omap_gpmc.c index bf99b8e675..610f9698e1 100644 --- a/drivers/mtd/nand/omap_gpmc.c +++ b/drivers/mtd/nand/omap_gpmc.c @@ -27,9 +27,30 @@ static u8 bch8_polynomial[] = {0xef, 0x51, 0x2e, 0x09, 0xed, 0x93, 0x9a, 0xc2, 0x97, 0x79, 0xe5, 0x24, 0xb5}; #endif -static uint8_t cs; +static uint8_t cs_next; static __maybe_unused struct nand_ecclayout omap_ecclayout; +#if defined(CONFIG_NAND_OMAP_GPMC_WSCFG) +static const int8_t wscfg[CONFIG_SYS_MAX_NAND_DEVICE] = + { CONFIG_NAND_OMAP_GPMC_WSCFG }; +#else +/* wscfg is preset to zero since its a static variable */ +static const int8_t wscfg[CONFIG_SYS_MAX_NAND_DEVICE]; +#endif + +/* + * Driver configurations + */ +struct omap_nand_info { + struct bch_control *control; + enum omap_ecc ecc_scheme; + uint8_t cs; + uint8_t ws; /* wait status pin (0,1) */ +}; + +/* We are wasting a bit of memory but al least we are safe */ +static struct omap_nand_info omap_nand_info[GPMC_MAX_CS]; + /* * omap_nand_hwcontrol - Set the address pointers corretly for the * following address/data/command operation @@ -38,6 +59,8 @@ static void omap_nand_hwcontrol(struct mtd_info *mtd, int32_t cmd, uint32_t ctrl) { register struct nand_chip *this = mtd->priv; + struct omap_nand_info *info = this->priv; + int cs = info->cs; /* * Point the IO_ADDR to DATA and ADDRESS registers instead @@ -59,14 +82,13 @@ static void omap_nand_hwcontrol(struct mtd_info *mtd, int32_t cmd, writeb(cmd, this->IO_ADDR_W); } -#ifdef CONFIG_SPL_BUILD /* Check wait pin as dev ready indicator */ -int omap_spl_dev_ready(struct mtd_info *mtd) +static int omap_dev_ready(struct mtd_info *mtd) { - return gpmc_cfg->status & (1 << 8); + register struct nand_chip *this = mtd->priv; + struct omap_nand_info *info = this->priv; + return gpmc_cfg->status & (1 << (8 + info->ws)); } -#endif - /* * gen_true_ecc - This function will generate true ECC value, which @@ -147,56 +169,6 @@ static int __maybe_unused omap_correct_data(struct mtd_info *mtd, uint8_t *dat, return 0; } -/* - * Generic BCH interface - */ -struct nand_bch_priv { - uint8_t mode; - uint8_t type; - uint8_t nibbles; - struct bch_control *control; - enum omap_ecc ecc_scheme; -}; - -/* bch types */ -#define ECC_BCH4 0 -#define ECC_BCH8 1 -#define ECC_BCH16 2 - -/* BCH nibbles for diff bch levels */ -#define ECC_BCH4_NIBBLES 13 -#define ECC_BCH8_NIBBLES 26 -#define ECC_BCH16_NIBBLES 52 - -/* - * This can be a single instance cause all current users have only one NAND - * with nearly the same setup (BCH8, some with ELM and others with sw BCH - * library). - * When some users with other BCH strength will exists this have to change! - */ -static __maybe_unused struct nand_bch_priv bch_priv = { - .type = ECC_BCH8, - .nibbles = ECC_BCH8_NIBBLES, - .control = NULL -}; - -/* - * omap_reverse_list - re-orders list elements in reverse order [internal] - * @list: pointer to start of list - * @length: length of list -*/ -void omap_reverse_list(u8 *list, unsigned int length) -{ - unsigned int i, j; - unsigned int half_length = length / 2; - u8 tmp; - for (i = 0, j = length - 1; i < half_length; i++, j--) { - tmp = list[i]; - list[i] = list[j]; - list[j] = tmp; - } -} - /* * omap_enable_hwecc - configures GPMC as per ECC scheme before read/write * @mtd: MTD device structure @@ -206,16 +178,17 @@ __maybe_unused static void omap_enable_hwecc(struct mtd_info *mtd, int32_t mode) { struct nand_chip *nand = mtd->priv; - struct nand_bch_priv *bch = nand->priv; + struct omap_nand_info *info = nand->priv; unsigned int dev_width = (nand->options & NAND_BUSWIDTH_16) ? 1 : 0; unsigned int ecc_algo = 0; unsigned int bch_type = 0; unsigned int eccsize1 = 0x00, eccsize0 = 0x00, bch_wrapmode = 0x00; u32 ecc_size_config_val = 0; u32 ecc_config_val = 0; + int cs = info->cs; /* configure GPMC for specific ecc-scheme */ - switch (bch->ecc_scheme) { + switch (info->ecc_scheme) { case OMAP_ECC_HAM1_CODE_SW: return; case OMAP_ECC_HAM1_CODE_HW: @@ -239,6 +212,19 @@ static void omap_enable_hwecc(struct mtd_info *mtd, int32_t mode) eccsize1 = 2; /* non-ECC bits in nibbles per sector */ } break; + case OMAP_ECC_BCH16_CODE_HW: + ecc_algo = 0x1; + bch_type = 0x2; + if (mode == NAND_ECC_WRITE) { + bch_wrapmode = 0x01; + eccsize0 = 0; /* extra bits in nibbles per sector */ + eccsize1 = 52; /* OOB bits in nibbles per sector */ + } else { + bch_wrapmode = 0x01; + eccsize0 = 52; /* ECC bits in nibbles per sector */ + eccsize1 = 0; /* non-ECC bits in nibbles per sector */ + } + break; default: return; } @@ -277,11 +263,11 @@ static int omap_calculate_ecc(struct mtd_info *mtd, const uint8_t *dat, uint8_t *ecc_code) { struct nand_chip *chip = mtd->priv; - struct nand_bch_priv *bch = chip->priv; + struct omap_nand_info *info = chip->priv; uint32_t *ptr, val = 0; int8_t i = 0, j; - switch (bch->ecc_scheme) { + switch (info->ecc_scheme) { case OMAP_ECC_HAM1_CODE_HW: val = readl(&gpmc_cfg->ecc1_result); ecc_code[0] = val & 0xFF; @@ -305,11 +291,34 @@ static int omap_calculate_ecc(struct mtd_info *mtd, const uint8_t *dat, ptr--; } break; + case OMAP_ECC_BCH16_CODE_HW: + val = readl(&gpmc_cfg->bch_result_4_6[0].bch_result_x[2]); + ecc_code[i++] = (val >> 8) & 0xFF; + ecc_code[i++] = (val >> 0) & 0xFF; + val = readl(&gpmc_cfg->bch_result_4_6[0].bch_result_x[1]); + ecc_code[i++] = (val >> 24) & 0xFF; + ecc_code[i++] = (val >> 16) & 0xFF; + ecc_code[i++] = (val >> 8) & 0xFF; + ecc_code[i++] = (val >> 0) & 0xFF; + val = readl(&gpmc_cfg->bch_result_4_6[0].bch_result_x[0]); + ecc_code[i++] = (val >> 24) & 0xFF; + ecc_code[i++] = (val >> 16) & 0xFF; + ecc_code[i++] = (val >> 8) & 0xFF; + ecc_code[i++] = (val >> 0) & 0xFF; + for (j = 3; j >= 0; j--) { + val = readl(&gpmc_cfg->bch_result_0_3[0].bch_result_x[j] + ); + ecc_code[i++] = (val >> 24) & 0xFF; + ecc_code[i++] = (val >> 16) & 0xFF; + ecc_code[i++] = (val >> 8) & 0xFF; + ecc_code[i++] = (val >> 0) & 0xFF; + } + break; default: return -EINVAL; } /* ECC scheme specific syndrome customizations */ - switch (bch->ecc_scheme) { + switch (info->ecc_scheme) { case OMAP_ECC_HAM1_CODE_HW: break; #ifdef CONFIG_BCH @@ -323,6 +332,8 @@ static int omap_calculate_ecc(struct mtd_info *mtd, const uint8_t *dat, case OMAP_ECC_BCH8_CODE_HW: ecc_code[chip->ecc.bytes - 1] = 0x00; break; + case OMAP_ECC_BCH16_CODE_HW: + break; default: return -EINVAL; } @@ -330,6 +341,23 @@ static int omap_calculate_ecc(struct mtd_info *mtd, const uint8_t *dat, } #ifdef CONFIG_NAND_OMAP_ELM +/* + * omap_reverse_list - re-orders list elements in reverse order [internal] + * @list: pointer to start of list + * @length: length of list +*/ +static void omap_reverse_list(u8 *list, unsigned int length) +{ + unsigned int i, j; + unsigned int half_length = length / 2; + u8 tmp; + for (i = 0, j = length - 1; i < half_length; i++, j--) { + tmp = list[i]; + list[i] = list[j]; + list[j] = tmp; + } +} + /* * omap_correct_data_bch - Compares the ecc read from nand spare area * with ECC registers values and corrects one bit error if it has occured @@ -345,16 +373,18 @@ static int omap_correct_data_bch(struct mtd_info *mtd, uint8_t *dat, uint8_t *read_ecc, uint8_t *calc_ecc) { struct nand_chip *chip = mtd->priv; - struct nand_bch_priv *bch = chip->priv; - uint32_t eccbytes = chip->ecc.bytes; + struct omap_nand_info *info = chip->priv; + struct nand_ecc_ctrl *ecc = &chip->ecc; uint32_t error_count = 0, error_max; - uint32_t error_loc[8]; + uint32_t error_loc[ELM_MAX_ERROR_COUNT]; + enum bch_level bch_type; uint32_t i, ecc_flag = 0; - uint8_t count, err = 0; + uint8_t count; uint32_t byte_pos, bit_pos; + int err = 0; /* check calculated ecc */ - for (i = 0; i < chip->ecc.bytes && !ecc_flag; i++) { + for (i = 0; i < ecc->bytes && !ecc_flag; i++) { if (calc_ecc[i] != 0x00) ecc_flag = 1; } @@ -363,7 +393,7 @@ static int omap_correct_data_bch(struct mtd_info *mtd, uint8_t *dat, /* check for whether its a erased-page */ ecc_flag = 0; - for (i = 0; i < chip->ecc.bytes && !ecc_flag; i++) { + for (i = 0; i < ecc->bytes && !ecc_flag; i++) { if (read_ecc[i] != 0xff) ecc_flag = 1; } @@ -374,25 +404,33 @@ static int omap_correct_data_bch(struct mtd_info *mtd, uint8_t *dat, * while reading ECC result we read it in big endian. * Hence while loading to ELM we have rotate to get the right endian. */ - switch (bch->ecc_scheme) { + switch (info->ecc_scheme) { case OMAP_ECC_BCH8_CODE_HW: - omap_reverse_list(calc_ecc, eccbytes - 1); + bch_type = BCH_8_BIT; + omap_reverse_list(calc_ecc, ecc->bytes - 1); + break; + case OMAP_ECC_BCH16_CODE_HW: + bch_type = BCH_16_BIT; + omap_reverse_list(calc_ecc, ecc->bytes); break; default: return -EINVAL; } /* use elm module to check for errors */ - elm_config((enum bch_level)(bch->type)); - if (elm_check_error(calc_ecc, bch->nibbles, &error_count, error_loc)) { - printf("nand: error: uncorrectable ECC errors\n"); - return -EINVAL; - } + elm_config(bch_type); + err = elm_check_error(calc_ecc, bch_type, &error_count, error_loc); + if (err) + return err; + /* correct bch error */ for (count = 0; count < error_count; count++) { - switch (bch->type) { - case ECC_BCH8: + switch (info->ecc_scheme) { + case OMAP_ECC_BCH8_CODE_HW: /* 14th byte in ECC is reserved to match ROM layout */ - error_max = SECTOR_BYTES + (eccbytes - 1); + error_max = SECTOR_BYTES + (ecc->bytes - 1); + break; + case OMAP_ECC_BCH16_CODE_HW: + error_max = SECTOR_BYTES + ecc->bytes; break; default: return -EINVAL; @@ -414,6 +452,115 @@ static int omap_correct_data_bch(struct mtd_info *mtd, uint8_t *dat, return (err) ? err : error_count; } +#ifdef CONFIG_NAND_OMAP_GPMC_PREFETCH + +#define PREFETCH_CONFIG1_CS_SHIFT 24 +#define PREFETCH_FIFOTHRESHOLD_MAX 0x40 +#define PREFETCH_FIFOTHRESHOLD(val) ((val) << 8) +#define PREFETCH_STATUS_COUNT(val) (val & 0x00003fff) +#define PREFETCH_STATUS_FIFO_CNT(val) ((val >> 24) & 0x7F) +#define ENABLE_PREFETCH (1 << 7) + +/** + * omap_prefetch_enable - configures and starts prefetch transfer + * @fifo_th: fifo threshold to be used for read/ write + * @count: number of bytes to be transferred + * @is_write: prefetch read(0) or write post(1) mode + * @cs: chip select to use + */ +static int omap_prefetch_enable(int fifo_th, unsigned int count, int is_write, int cs) +{ + uint32_t val; + + if (fifo_th > PREFETCH_FIFOTHRESHOLD_MAX) + return -EINVAL; + + if (readl(&gpmc_cfg->prefetch_control)) + return -EBUSY; + + /* Set the amount of bytes to be prefetched */ + writel(count, &gpmc_cfg->prefetch_config2); + + val = (cs << PREFETCH_CONFIG1_CS_SHIFT) | (is_write & 1) | + PREFETCH_FIFOTHRESHOLD(fifo_th) | ENABLE_PREFETCH; + writel(val, &gpmc_cfg->prefetch_config1); + + /* Start the prefetch engine */ + writel(1, &gpmc_cfg->prefetch_control); + + return 0; +} + +/** + * omap_prefetch_reset - disables and stops the prefetch engine + */ +static void omap_prefetch_reset(void) +{ + writel(0, &gpmc_cfg->prefetch_control); + writel(0, &gpmc_cfg->prefetch_config1); +} + +static int __read_prefetch_aligned(struct nand_chip *chip, uint32_t *buf, int len) +{ + int ret; + uint32_t cnt; + struct omap_nand_info *info = chip->priv; + + ret = omap_prefetch_enable(PREFETCH_FIFOTHRESHOLD_MAX, len, 0, info->cs); + if (ret < 0) + return ret; + + do { + int i; + + cnt = readl(&gpmc_cfg->prefetch_status); + cnt = PREFETCH_STATUS_FIFO_CNT(cnt); + + for (i = 0; i < cnt / 4; i++) { + *buf++ = readl(CONFIG_SYS_NAND_BASE); + len -= 4; + } + } while (len); + + omap_prefetch_reset(); + + return 0; +} + +static void omap_nand_read_prefetch8(struct mtd_info *mtd, uint8_t *buf, int len) +{ + int ret; + uint32_t head, tail; + struct nand_chip *chip = mtd->priv; + + /* + * If the destination buffer is unaligned, start with reading + * the overlap byte-wise. + */ + head = ((uint32_t) buf) % 4; + if (head) { + nand_read_buf(mtd, buf, head); + buf += head; + len -= head; + } + + /* + * Only transfer multiples of 4 bytes in a pre-fetched fashion. + * If there's a residue, care for it byte-wise afterwards. + */ + tail = len % 4; + + ret = __read_prefetch_aligned(chip, (uint32_t *) buf, len - tail); + if (ret < 0) { + /* fallback in case the prefetch engine is busy */ + nand_read_buf(mtd, buf, len); + } else if (tail) { + buf += len - tail; + nand_read_buf(mtd, buf, tail); + } +} +#endif /* CONFIG_NAND_OMAP_GPMC_PREFETCH */ + /** * omap_read_page_bch - hardware ecc based page read function * @mtd: mtd info structure @@ -446,11 +593,11 @@ static int omap_read_page_bch(struct mtd_info *mtd, struct nand_chip *chip, oob += eccbytes) { chip->ecc.hwctl(mtd, NAND_ECC_READ); /* read data */ - chip->cmdfunc(mtd, NAND_CMD_RNDOUT, data_pos, page); + chip->cmdfunc(mtd, NAND_CMD_RNDOUT, data_pos, -1); chip->read_buf(mtd, p, eccsize); /* read respective ecc from oob area */ - chip->cmdfunc(mtd, NAND_CMD_RNDOUT, oob_pos, page); + chip->cmdfunc(mtd, NAND_CMD_RNDOUT, oob_pos, -1); chip->read_buf(mtd, oob, eccbytes); /* read syndrome */ chip->ecc.calculate(mtd, p, &ecc_calc[i]); @@ -496,10 +643,10 @@ static int omap_correct_data_bch_sw(struct mtd_info *mtd, u_char *data, /* cannot correct more than 8 errors */ unsigned int errloc[8]; struct nand_chip *chip = mtd->priv; - struct nand_bch_priv *chip_priv = chip->priv; - struct bch_control *bch = chip_priv->control; + struct omap_nand_info *info = chip->priv; - count = decode_bch(bch, NULL, 512, read_ecc, calc_ecc, NULL, errloc); + count = decode_bch(info->control, NULL, 512, read_ecc, calc_ecc, + NULL, errloc); if (count > 0) { /* correct errors */ for (i = 0; i < count; i++) { @@ -535,15 +682,11 @@ static int omap_correct_data_bch_sw(struct mtd_info *mtd, u_char *data, static void __maybe_unused omap_free_bch(struct mtd_info *mtd) { struct nand_chip *chip = mtd->priv; - struct nand_bch_priv *chip_priv = chip->priv; - struct bch_control *bch = NULL; - - if (chip_priv) - bch = chip_priv->control; + struct omap_nand_info *info = chip->priv; - if (bch) { - free_bch(bch); - chip_priv->control = NULL; + if (info->control) { + free_bch(info->control); + info->control = NULL; } } #endif /* CONFIG_BCH */ @@ -557,7 +700,7 @@ static void __maybe_unused omap_free_bch(struct mtd_info *mtd) */ static int omap_select_ecc_scheme(struct nand_chip *nand, enum omap_ecc ecc_scheme, unsigned int pagesize, unsigned int oobsize) { - struct nand_bch_priv *bch = nand->priv; + struct omap_nand_info *info = nand->priv; struct nand_ecclayout *ecclayout = &omap_ecclayout; int eccsteps = pagesize / SECTOR_BYTES; int i; @@ -567,12 +710,10 @@ static int omap_select_ecc_scheme(struct nand_chip *nand, debug("nand: selected OMAP_ECC_HAM1_CODE_SW\n"); /* For this ecc-scheme, ecc.bytes, ecc.layout, ... are * initialized in nand_scan_tail(), so just set ecc.mode */ - bch_priv.control = NULL; - bch_priv.type = 0; + info->control = NULL; nand->ecc.mode = NAND_ECC_SOFT; nand->ecc.layout = NULL; nand->ecc.size = 0; - bch->ecc_scheme = OMAP_ECC_HAM1_CODE_SW; break; case OMAP_ECC_HAM1_CODE_HW: @@ -583,8 +724,7 @@ static int omap_select_ecc_scheme(struct nand_chip *nand, (3 * eccsteps) + BADBLOCK_MARKER_LENGTH)); return -EINVAL; } - bch_priv.control = NULL; - bch_priv.type = 0; + info->control = NULL; /* populate ecc specific fields */ memset(&nand->ecc, 0, sizeof(struct nand_ecc_ctrl)); nand->ecc.mode = NAND_ECC_HW; @@ -605,7 +745,6 @@ static int omap_select_ecc_scheme(struct nand_chip *nand, ecclayout->oobfree[0].offset = i + BADBLOCK_MARKER_LENGTH; ecclayout->oobfree[0].length = oobsize - ecclayout->eccbytes - BADBLOCK_MARKER_LENGTH; - bch->ecc_scheme = OMAP_ECC_HAM1_CODE_HW; break; case OMAP_ECC_BCH8_CODE_HW_DETECTION_SW: @@ -618,12 +757,11 @@ static int omap_select_ecc_scheme(struct nand_chip *nand, return -EINVAL; } /* check if BCH S/W library can be used for error detection */ - bch_priv.control = init_bch(13, 8, 0x201b); - if (!bch_priv.control) { + info->control = init_bch(13, 8, 0x201b); + if (!info->control) { printf("nand: error: could not init_bch()\n"); return -ENODEV; } - bch_priv.type = ECC_BCH8; /* populate ecc specific fields */ memset(&nand->ecc, 0, sizeof(struct nand_ecc_ctrl)); nand->ecc.mode = NAND_ECC_HW; @@ -647,7 +785,6 @@ static int omap_select_ecc_scheme(struct nand_chip *nand, ecclayout->oobfree[0].offset = i + BADBLOCK_MARKER_LENGTH; ecclayout->oobfree[0].length = oobsize - ecclayout->eccbytes - BADBLOCK_MARKER_LENGTH; - bch->ecc_scheme = OMAP_ECC_BCH8_CODE_HW_DETECTION_SW; break; #else printf("nand: error: CONFIG_BCH required for ECC\n"); @@ -665,7 +802,7 @@ static int omap_select_ecc_scheme(struct nand_chip *nand, } /* intialize ELM for ECC error detection */ elm_init(); - bch_priv.type = ECC_BCH8; + info->control = NULL; /* populate ecc specific fields */ memset(&nand->ecc, 0, sizeof(struct nand_ecc_ctrl)); nand->ecc.mode = NAND_ECC_HW; @@ -683,13 +820,44 @@ static int omap_select_ecc_scheme(struct nand_chip *nand, ecclayout->oobfree[0].offset = i + BADBLOCK_MARKER_LENGTH; ecclayout->oobfree[0].length = oobsize - ecclayout->eccbytes - BADBLOCK_MARKER_LENGTH; - bch->ecc_scheme = OMAP_ECC_BCH8_CODE_HW; break; #else printf("nand: error: CONFIG_NAND_OMAP_ELM required for ECC\n"); return -EINVAL; #endif + case OMAP_ECC_BCH16_CODE_HW: +#ifdef CONFIG_NAND_OMAP_ELM + debug("nand: using OMAP_ECC_BCH16_CODE_HW\n"); + /* check ecc-scheme requirements before updating ecc info */ + if ((26 * eccsteps) + BADBLOCK_MARKER_LENGTH > oobsize) { + printf("nand: error: insufficient OOB: require=%d\n", ( + (26 * eccsteps) + BADBLOCK_MARKER_LENGTH)); + return -EINVAL; + } + /* intialize ELM for ECC error detection */ + elm_init(); + /* populate ecc specific fields */ + nand->ecc.mode = NAND_ECC_HW; + nand->ecc.size = SECTOR_BYTES; + nand->ecc.bytes = 26; + nand->ecc.strength = 16; + nand->ecc.hwctl = omap_enable_hwecc; + nand->ecc.correct = omap_correct_data_bch; + nand->ecc.calculate = omap_calculate_ecc; + nand->ecc.read_page = omap_read_page_bch; + /* define ecc-layout */ + ecclayout->eccbytes = nand->ecc.bytes * eccsteps; + for (i = 0; i < ecclayout->eccbytes; i++) + ecclayout->eccpos[i] = i + BADBLOCK_MARKER_LENGTH; + ecclayout->oobfree[0].offset = i + BADBLOCK_MARKER_LENGTH; + ecclayout->oobfree[0].length = oobsize - nand->ecc.bytes - + BADBLOCK_MARKER_LENGTH; + break; +#else + printf("nand: error: CONFIG_NAND_OMAP_ELM required for ECC\n"); + return -EINVAL; +#endif default: debug("nand: error: ecc scheme not enabled or supported\n"); return -EINVAL; @@ -699,6 +867,7 @@ static int omap_select_ecc_scheme(struct nand_chip *nand, if (ecc_scheme != OMAP_ECC_HAM1_CODE_SW) nand->ecc.layout = ecclayout; + info->ecc_scheme = ecc_scheme; return 0; } @@ -743,8 +912,18 @@ int __maybe_unused omap_nand_switch_ecc(uint32_t hardware, uint32_t eccstrength) return -EINVAL; } } else { - err = omap_select_ecc_scheme(nand, OMAP_ECC_HAM1_CODE_SW, + if (eccstrength == 1) { + err = omap_select_ecc_scheme(nand, + OMAP_ECC_HAM1_CODE_SW, + mtd->writesize, mtd->oobsize); + } else if (eccstrength == 8) { + err = omap_select_ecc_scheme(nand, + OMAP_ECC_BCH8_CODE_HW_DETECTION_SW, mtd->writesize, mtd->oobsize); + } else { + printf("nand: error: unsupported ECC scheme\n"); + return -EINVAL; + } } /* Update NAND handling after ECC mode switch */ @@ -772,7 +951,7 @@ int __maybe_unused omap_nand_switch_ecc(uint32_t hardware, uint32_t eccstrength) int board_nand_init(struct nand_chip *nand) { int32_t gpmc_config = 0; - cs = 0; + int cs = cs_next++; int err = 0; /* * xloader/Uboot's gpmc configuration would have configured GPMC for @@ -802,16 +981,24 @@ int board_nand_init(struct nand_chip *nand) nand->IO_ADDR_R = (void __iomem *)&gpmc_cfg->cs[cs].nand_dat; nand->IO_ADDR_W = (void __iomem *)&gpmc_cfg->cs[cs].nand_cmd; - nand->priv = &bch_priv; + omap_nand_info[cs].control = NULL; + omap_nand_info[cs].cs = cs; + omap_nand_info[cs].ws = wscfg[cs]; + nand->priv = &omap_nand_info[cs]; nand->cmd_ctrl = omap_nand_hwcontrol; nand->options |= NAND_NO_PADDING | NAND_CACHEPRG; - /* If we are 16 bit dev, our gpmc config tells us that */ - if ((readl(&gpmc_cfg->cs[cs].config1) & 0x3000) == 0x1000) - nand->options |= NAND_BUSWIDTH_16; - nand->chip_delay = 100; nand->ecc.layout = &omap_ecclayout; + /* configure driver and controller based on NAND device bus-width */ + gpmc_config = readl(&gpmc_cfg->cs[cs].config1); +#if defined(CONFIG_SYS_NAND_BUSWIDTH_16BIT) + nand->options |= NAND_BUSWIDTH_16; + writel(gpmc_config | (0x1 << 12), &gpmc_cfg->cs[cs].config1); +#else + nand->options &= ~NAND_BUSWIDTH_16; + writel(gpmc_config & ~(0x1 << 12), &gpmc_cfg->cs[cs].config1); +#endif /* select ECC scheme */ #if defined(CONFIG_NAND_OMAP_ECCSCHEME) err = omap_select_ecc_scheme(nand, CONFIG_NAND_OMAP_ECCSCHEME, @@ -824,13 +1011,18 @@ int board_nand_init(struct nand_chip *nand) if (err) return err; -#ifdef CONFIG_SPL_BUILD + /* TODO: Implement for 16-bit bus width */ if (nand->options & NAND_BUSWIDTH_16) nand->read_buf = nand_read_buf16; +#ifdef CONFIG_NAND_OMAP_GPMC_PREFETCH + else + nand->read_buf = omap_nand_read_prefetch8; +#else else nand->read_buf = nand_read_buf; - nand->dev_ready = omap_spl_dev_ready; #endif + nand->dev_ready = omap_dev_ready; + return 0; }