X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=drivers%2Fmtd%2Fnand%2Fnand_util.c;h=024f6fb4402485bc6337a00af308e1eeb5a3e013;hb=e3bf81b1e841ecabe7c8b3d48621256db8b8623e;hp=8b4f7388152c70e209d2f8f8193d3ea0a35306e3;hpb=aad813a342aca1a8127a283c64813e4ae4464d9c;p=u-boot diff --git a/drivers/mtd/nand/nand_util.c b/drivers/mtd/nand/nand_util.c index 8b4f738815..024f6fb440 100644 --- a/drivers/mtd/nand/nand_util.c +++ b/drivers/mtd/nand/nand_util.c @@ -11,29 +11,12 @@ * nandwrite.c by Steven J. Hill (sjhill@realitydiluted.com) * and Thomas Gleixner (tglx@linutronix.de) * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License version - * 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA + * Copyright (C) 2008 Nokia Corporation: drop_ffs() function by + * Artem Bityutskiy from mtd-utils * * Copyright 2010 Freescale Semiconductor - * The portions of this file whose copyright is held by Freescale and which - * are not considered a derived work of GPL v2-only code may be distributed - * and/or modified under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of the - * License, or (at your option) any later version. + * + * SPDX-License-Identifier: GPL-2.0 */ #include @@ -47,22 +30,16 @@ #include #include -typedef struct erase_info erase_info_t; -typedef struct mtd_info mtd_info_t; +typedef struct erase_info erase_info_t; +typedef struct mtd_info mtd_info_t; /* support only for native endian JFFS2 */ #define cpu_to_je16(x) (x) #define cpu_to_je32(x) (x) -/*****************************************************************************/ -static int nand_block_bad_scrub(struct mtd_info *mtd, loff_t ofs, int getchip) -{ - return 0; -} - /** * nand_erase_opts: - erase NAND flash with support for various options - * (jffs2 formating) + * (jffs2 formatting) * * @param meminfo NAND device to erase * @param opts options, @see struct nand_erase_options @@ -76,16 +53,14 @@ int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts) struct jffs2_unknown_node cleanmarker; erase_info_t erase; unsigned long erase_length, erased_length; /* in blocks */ - int bbtest = 1; int result; int percent_complete = -1; - int (*nand_block_bad_old)(struct mtd_info *, loff_t, int) = NULL; const char *mtd_device = meminfo->name; struct mtd_oob_ops oob_opts; struct nand_chip *chip = meminfo->priv; - if ((opts->offset & (meminfo->writesize - 1)) != 0) { - printf("Attempt to erase non page aligned data\n"); + if ((opts->offset & (meminfo->erasesize - 1)) != 0) { + printf("Attempt to erase non block-aligned data\n"); return -1; } @@ -98,8 +73,8 @@ int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts) erase_length = lldiv(opts->length + meminfo->erasesize - 1, meminfo->erasesize); - cleanmarker.magic = cpu_to_je16 (JFFS2_MAGIC_BITMASK); - cleanmarker.nodetype = cpu_to_je16 (JFFS2_NODETYPE_CLEANMARKER); + cleanmarker.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); + cleanmarker.nodetype = cpu_to_je16(JFFS2_NODETYPE_CLEANMARKER); cleanmarker.totlen = cpu_to_je32(8); /* scrub option allows to erase badblock. To prevent internal @@ -107,27 +82,29 @@ int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts) * and disable bad block table while erasing. */ if (opts->scrub) { - struct nand_chip *priv_nand = meminfo->priv; - - nand_block_bad_old = priv_nand->block_bad; - priv_nand->block_bad = nand_block_bad_scrub; - /* we don't need the bad block table anymore... + erase.scrub = opts->scrub; + /* + * We don't need the bad block table anymore... * after scrub, there are no bad blocks left! */ - if (priv_nand->bbt) { - kfree(priv_nand->bbt); + if (chip->bbt) { + kfree(chip->bbt); } - priv_nand->bbt = NULL; + chip->bbt = NULL; } for (erased_length = 0; erased_length < erase_length; erase.addr += meminfo->erasesize) { - WATCHDOG_RESET (); + WATCHDOG_RESET(); - if (!opts->scrub && bbtest) { - int ret = meminfo->block_isbad(meminfo, erase.addr); + if (opts->lim && (erase.addr >= (opts->offset + opts->lim))) { + puts("Size of erase exceeds limit\n"); + return -EFBIG; + } + if (!opts->scrub) { + int ret = mtd_block_isbad(meminfo, erase.addr); if (ret > 0) { if (!opts->quiet) printf("\rSkipping bad block at " @@ -150,7 +127,7 @@ int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts) erased_length++; - result = meminfo->erase(meminfo, &erase); + result = mtd_erase(meminfo, &erase); if (result != 0) { printf("\n%s: MTD Erase failure: %d\n", mtd_device, result); @@ -159,15 +136,16 @@ int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts) /* format for JFFS2 ? */ if (opts->jffs2 && chip->ecc.layout->oobavail >= 8) { - chip->ops.ooblen = 8; - chip->ops.datbuf = NULL; - chip->ops.oobbuf = (uint8_t *)&cleanmarker; - chip->ops.ooboffs = 0; - chip->ops.mode = MTD_OOB_AUTO; - - result = meminfo->write_oob(meminfo, - erase.addr, - &chip->ops); + struct mtd_oob_ops ops; + ops.ooblen = 8; + ops.datbuf = NULL; + ops.oobbuf = (uint8_t *)&cleanmarker; + ops.ooboffs = 0; + ops.mode = MTD_OPS_AUTO_OOB; + + result = mtd_write_oob(meminfo, + erase.addr, + &ops); if (result != 0) { printf("\n%s: MTD writeoob failure: %d\n", mtd_device, result); @@ -201,28 +179,21 @@ int nand_erase_opts(nand_info_t *meminfo, const nand_erase_options_t *opts) if (!opts->quiet) printf("\n"); - if (nand_block_bad_old) { - struct nand_chip *priv_nand = meminfo->priv; - - priv_nand->block_bad = nand_block_bad_old; - priv_nand->scan_bbt(meminfo); - } + if (opts->scrub) + chip->scan_bbt(meminfo); return 0; } #ifdef CONFIG_CMD_NAND_LOCK_UNLOCK +#define NAND_CMD_LOCK_TIGHT 0x2c +#define NAND_CMD_LOCK_STATUS 0x7a + /****************************************************************************** * Support for locking / unlocking operations of some NAND devices *****************************************************************************/ -#define NAND_CMD_LOCK 0x2a -#define NAND_CMD_LOCK_TIGHT 0x2c -#define NAND_CMD_UNLOCK1 0x23 -#define NAND_CMD_UNLOCK2 0x24 -#define NAND_CMD_LOCK_STATUS 0x7a - /** * nand_lock: Set all pages of NAND flash chip to the LOCK or LOCK-TIGHT * state @@ -253,6 +224,14 @@ int nand_lock(struct mtd_info *mtd, int tight) /* select the NAND device */ chip->select_chip(mtd, 0); + /* check the Lock Tight Status */ + chip->cmdfunc(mtd, NAND_CMD_LOCK_STATUS, -1, 0); + if (chip->read_byte(mtd) & NAND_LOCK_STATUS_TIGHT) { + printf("nand_lock: Device is locked tight!\n"); + ret = -1; + goto out; + } + chip->cmdfunc(mtd, (tight ? NAND_CMD_LOCK_TIGHT : NAND_CMD_LOCK), -1, -1); @@ -265,6 +244,7 @@ int nand_lock(struct mtd_info *mtd, int tight) ret = -1; } + out: /* de-select the NAND device */ chip->select_chip(mtd, -1); return ret; @@ -275,13 +255,12 @@ int nand_lock(struct mtd_info *mtd, int tight) * flash * * @param mtd nand mtd instance - * @param offset page address to query (muss be page aligned!) + * @param offset page address to query (must be page-aligned!) * * @return -1 in case of error * >0 lock status: * bitfield with the following combinations: * NAND_LOCK_STATUS_TIGHT: page in tight state - * NAND_LOCK_STATUS_LOCK: page locked * NAND_LOCK_STATUS_UNLOCK: page unlocked * */ @@ -298,7 +277,7 @@ int nand_get_lock_status(struct mtd_info *mtd, loff_t offset) if ((offset & (mtd->writesize - 1)) != 0) { - printf ("nand_get_lock_status: " + printf("nand_get_lock_status: " "Start address must be beginning of " "nand page!\n"); ret = -1; @@ -310,7 +289,6 @@ int nand_get_lock_status(struct mtd_info *mtd, loff_t offset) chip->cmdfunc(mtd, NAND_CMD_LOCK_STATUS, -1, page & chip->pagemask); ret = chip->read_byte(mtd) & (NAND_LOCK_STATUS_TIGHT - | NAND_LOCK_STATUS_LOCK | NAND_LOCK_STATUS_UNLOCK); out: @@ -327,18 +305,21 @@ int nand_get_lock_status(struct mtd_info *mtd, loff_t offset) * @param start start byte address * @param length number of bytes to unlock (must be a multiple of * page size nand->writesize) + * @param allexcept if set, unlock everything not selected * * @return 0 on success, -1 in case of error */ -int nand_unlock(struct mtd_info *mtd, ulong start, ulong length) +int nand_unlock(struct mtd_info *mtd, loff_t start, size_t length, + int allexcept) { int ret = 0; int chipnr; int status; int page; struct nand_chip *chip = mtd->priv; - printf ("nand_unlock: start: %08x, length: %d!\n", - (int)start, (int)length); + + debug("nand_unlock%s: start: %08llx, length: %zd!\n", + allexcept ? " (allexcept)" : "", start, length); /* select the NAND device */ chipnr = (int)(start >> chip->chip_shift); @@ -347,20 +328,29 @@ int nand_unlock(struct mtd_info *mtd, ulong start, ulong length) /* check the WP bit */ chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); if (!(chip->read_byte(mtd) & NAND_STATUS_WP)) { - printf ("nand_unlock: Device is write protected!\n"); + printf("nand_unlock: Device is write protected!\n"); + ret = -1; + goto out; + } + + /* check the Lock Tight Status */ + page = (int)(start >> chip->page_shift); + chip->cmdfunc(mtd, NAND_CMD_LOCK_STATUS, -1, page & chip->pagemask); + if (chip->read_byte(mtd) & NAND_LOCK_STATUS_TIGHT) { + printf("nand_unlock: Device is locked tight!\n"); ret = -1; goto out; } if ((start & (mtd->erasesize - 1)) != 0) { - printf ("nand_unlock: Start address must be beginning of " + printf("nand_unlock: Start address must be beginning of " "nand block!\n"); ret = -1; goto out; } if (length == 0 || (length & (mtd->erasesize - 1)) != 0) { - printf ("nand_unlock: Length must be a multiple of nand block " + printf("nand_unlock: Length must be a multiple of nand block " "size %08x!\n", mtd->erasesize); ret = -1; goto out; @@ -373,11 +363,19 @@ int nand_unlock(struct mtd_info *mtd, ulong start, ulong length) length -= mtd->erasesize; /* submit address of first page to unlock */ - page = (int)(start >> chip->page_shift); chip->cmdfunc(mtd, NAND_CMD_UNLOCK1, -1, page & chip->pagemask); /* submit ADDRESS of LAST page to unlock */ page += (int)(length >> chip->page_shift); + + /* + * Page addresses for unlocking are supposed to be block-aligned. + * At least some NAND chips use the low bit to indicate that the + * page range should be inverted. + */ + if (allexcept) + page |= 1; + chip->cmdfunc(mtd, NAND_CMD_UNLOCK2, -1, page & chip->pagemask); /* call wait ready function */ @@ -405,11 +403,13 @@ int nand_unlock(struct mtd_info *mtd, ulong start, ulong length) * @param nand NAND device * @param offset offset in flash * @param length image length + * @param used length of flash needed for the requested length * @return 0 if the image fits and there are no bad blocks * 1 if the image fits, but there are bad blocks * -1 if the image does not fit */ -static int check_skip_len(nand_info_t *nand, loff_t offset, size_t length) +static int check_skip_len(nand_info_t *nand, loff_t offset, size_t length, + size_t *used) { size_t len_excl_bad = 0; int ret = 0; @@ -431,41 +431,86 @@ static int check_skip_len(nand_info_t *nand, loff_t offset, size_t length) ret = 1; offset += block_len; + *used += block_len; } + /* If the length is not a multiple of block_len, adjust. */ + if (len_excl_bad > length) + *used -= (len_excl_bad - length); + return ret; } +#ifdef CONFIG_CMD_NAND_TRIMFFS +static size_t drop_ffs(const nand_info_t *nand, const u_char *buf, + const size_t *len) +{ + size_t l = *len; + ssize_t i; + + for (i = l - 1; i >= 0; i--) + if (buf[i] != 0xFF) + break; + + /* The resulting length must be aligned to the minimum flash I/O size */ + l = i + 1; + l = (l + nand->writesize - 1) / nand->writesize; + l *= nand->writesize; + + /* + * since the input length may be unaligned, prevent access past the end + * of the buffer + */ + return min(l, *len); +} +#endif + /** * nand_write_skip_bad: * * Write image to NAND flash. * Blocks that are marked bad are skipped and the is written to the next * block instead as long as the image is short enough to fit even after - * skipping the bad blocks. + * skipping the bad blocks. Due to bad blocks we may not be able to + * perform the requested write. In the case where the write would + * extend beyond the end of the NAND device, both length and actual (if + * not NULL) are set to 0. In the case where the write would extend + * beyond the limit we are passed, length is set to 0 and actual is set + * to the required length. * * @param nand NAND device * @param offset offset in flash * @param length buffer length + * @param actual set to size required to write length worth of + * buffer or 0 on error, if not NULL + * @param lim maximum size that actual may be in order to not + * exceed the buffer * @param buffer buffer to read from - * @param withoob whether write with yaffs format + * @param flags flags modifying the behaviour of the write to NAND * @return 0 in case of success */ int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length, - u_char *buffer, int withoob) + size_t *actual, loff_t lim, u_char *buffer, int flags) { int rval = 0, blocksize; size_t left_to_write = *length; + size_t used_for_write = 0; u_char *p_buffer = buffer; int need_skip; + if (actual) + *actual = 0; + #ifdef CONFIG_CMD_NAND_YAFFS - if (withoob) { + if (flags & WITH_YAFFS_OOB) { + if (flags & ~WITH_YAFFS_OOB) + return -EINVAL; + int pages; pages = nand->erasesize / nand->writesize; blocksize = (pages * nand->oobsize) + nand->erasesize; if (*length % (nand->writesize + nand->oobsize)) { - printf ("Attempt to write incomplete page" + printf("Attempt to write incomplete page" " in yaffs mode\n"); return -EINVAL; } @@ -487,37 +532,47 @@ int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length, * partition boundary). So don't try to handle that. */ if ((offset & (nand->writesize - 1)) != 0) { - printf ("Attempt to write non page aligned data\n"); + printf("Attempt to write non page-aligned data\n"); *length = 0; return -EINVAL; } - need_skip = check_skip_len(nand, offset, *length); + need_skip = check_skip_len(nand, offset, *length, &used_for_write); + + if (actual) + *actual = used_for_write; + if (need_skip < 0) { - printf ("Attempt to write outside the flash area\n"); + printf("Attempt to write outside the flash area\n"); *length = 0; return -EINVAL; } - if (!need_skip) { - rval = nand_write (nand, offset, length, buffer); + if (used_for_write > lim) { + puts("Size of write exceeds partition or device limit\n"); + *length = 0; + return -EFBIG; + } + + if (!need_skip && !(flags & WITH_DROP_FFS)) { + rval = nand_write(nand, offset, length, buffer); if (rval == 0) return 0; *length = 0; - printf ("NAND write to offset %llx failed %d\n", + printf("NAND write to offset %llx failed %d\n", offset, rval); return rval; } while (left_to_write > 0) { size_t block_offset = offset & (nand->erasesize - 1); - size_t write_size; + size_t write_size, truncated_write_size; - WATCHDOG_RESET (); + WATCHDOG_RESET(); - if (nand_block_isbad (nand, offset & ~(nand->erasesize - 1))) { - printf ("Skip bad block 0x%08llx\n", + if (nand_block_isbad(nand, offset & ~(nand->erasesize - 1))) { + printf("Skip bad block 0x%08llx\n", offset & ~(nand->erasesize - 1)); offset += nand->erasesize - block_offset; continue; @@ -529,7 +584,7 @@ int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length, write_size = blocksize - block_offset; #ifdef CONFIG_CMD_NAND_YAFFS - if (withoob) { + if (flags & WITH_YAFFS_OOB) { int page, pages; size_t pagesize = nand->writesize; size_t pagesize_oob = pagesize + nand->oobsize; @@ -537,16 +592,18 @@ int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length, ops.len = pagesize; ops.ooblen = nand->oobsize; - ops.mode = MTD_OOB_AUTO; + ops.mode = MTD_OPS_AUTO_OOB; ops.ooboffs = 0; pages = write_size / pagesize_oob; for (page = 0; page < pages; page++) { + WATCHDOG_RESET(); + ops.datbuf = p_buffer; ops.oobbuf = ops.datbuf + pagesize; - rval = nand->write_oob(nand, offset, &ops); - if (!rval) + rval = mtd_write_oob(nand, offset, &ops); + if (rval != 0) break; offset += pagesize; @@ -556,13 +613,21 @@ int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length, else #endif { - rval = nand_write (nand, offset, &write_size, p_buffer); + truncated_write_size = write_size; +#ifdef CONFIG_CMD_NAND_TRIMFFS + if (flags & WITH_DROP_FFS) + truncated_write_size = drop_ffs(nand, p_buffer, + &write_size); +#endif + + rval = nand_write(nand, offset, &truncated_write_size, + p_buffer); offset += write_size; p_buffer += write_size; } if (rval != 0) { - printf ("NAND write to offset %llx failed %d\n", + printf("NAND write to offset %llx failed %d\n", offset, rval); *length -= left_to_write; return rval; @@ -578,44 +643,66 @@ int nand_write_skip_bad(nand_info_t *nand, loff_t offset, size_t *length, * nand_read_skip_bad: * * Read image from NAND flash. - * Blocks that are marked bad are skipped and the next block is readen - * instead as long as the image is short enough to fit even after skipping the - * bad blocks. + * Blocks that are marked bad are skipped and the next block is read + * instead as long as the image is short enough to fit even after + * skipping the bad blocks. Due to bad blocks we may not be able to + * perform the requested read. In the case where the read would extend + * beyond the end of the NAND device, both length and actual (if not + * NULL) are set to 0. In the case where the read would extend beyond + * the limit we are passed, length is set to 0 and actual is set to the + * required length. * * @param nand NAND device * @param offset offset in flash - * @param length buffer length, on return holds remaining bytes to read + * @param length buffer length, on return holds number of read bytes + * @param actual set to size required to read length worth of buffer or 0 + * on error, if not NULL + * @param lim maximum size that actual may be in order to not exceed the + * buffer * @param buffer buffer to write to * @return 0 in case of success */ int nand_read_skip_bad(nand_info_t *nand, loff_t offset, size_t *length, - u_char *buffer) + size_t *actual, loff_t lim, u_char *buffer) { int rval; size_t left_to_read = *length; + size_t used_for_read = 0; u_char *p_buffer = buffer; int need_skip; if ((offset & (nand->writesize - 1)) != 0) { - printf ("Attempt to read non page aligned data\n"); + printf("Attempt to read non page-aligned data\n"); *length = 0; + if (actual) + *actual = 0; return -EINVAL; } - need_skip = check_skip_len(nand, offset, *length); + need_skip = check_skip_len(nand, offset, *length, &used_for_read); + + if (actual) + *actual = used_for_read; + if (need_skip < 0) { - printf ("Attempt to read outside the flash area\n"); + printf("Attempt to read outside the flash area\n"); *length = 0; return -EINVAL; } + if (used_for_read > lim) { + puts("Size of read exceeds partition or device limit\n"); + *length = 0; + return -EFBIG; + } + if (!need_skip) { - rval = nand_read (nand, offset, length, buffer); + rval = nand_read(nand, offset, length, buffer); if (!rval || rval == -EUCLEAN) return 0; *length = 0; - printf ("NAND read from offset %llx failed %d\n", + printf("NAND read from offset %llx failed %d\n", offset, rval); return rval; } @@ -624,10 +711,10 @@ int nand_read_skip_bad(nand_info_t *nand, loff_t offset, size_t *length, size_t block_offset = offset & (nand->erasesize - 1); size_t read_length; - WATCHDOG_RESET (); + WATCHDOG_RESET(); - if (nand_block_isbad (nand, offset & ~(nand->erasesize - 1))) { - printf ("Skipping bad block 0x%08llx\n", + if (nand_block_isbad(nand, offset & ~(nand->erasesize - 1))) { + printf("Skipping bad block 0x%08llx\n", offset & ~(nand->erasesize - 1)); offset += nand->erasesize - block_offset; continue; @@ -638,9 +725,9 @@ int nand_read_skip_bad(nand_info_t *nand, loff_t offset, size_t *length, else read_length = nand->erasesize - block_offset; - rval = nand_read (nand, offset, &read_length, p_buffer); + rval = nand_read(nand, offset, &read_length, p_buffer); if (rval && rval != -EUCLEAN) { - printf ("NAND read from offset %llx failed %d\n", + printf("NAND read from offset %llx failed %d\n", offset, rval); *length -= left_to_read; return rval; @@ -653,3 +740,125 @@ int nand_read_skip_bad(nand_info_t *nand, loff_t offset, size_t *length, return 0; } + +#ifdef CONFIG_CMD_NAND_TORTURE + +/** + * check_pattern: + * + * Check if buffer contains only a certain byte pattern. + * + * @param buf buffer to check + * @param patt the pattern to check + * @param size buffer size in bytes + * @return 1 if there are only patt bytes in buf + * 0 if something else was found + */ +static int check_pattern(const u_char *buf, u_char patt, int size) +{ + int i; + + for (i = 0; i < size; i++) + if (buf[i] != patt) + return 0; + return 1; +} + +/** + * nand_torture: + * + * Torture a block of NAND flash. + * This is useful to determine if a block that caused a write error is still + * good or should be marked as bad. + * + * @param nand NAND device + * @param offset offset in flash + * @return 0 if the block is still good + */ +int nand_torture(nand_info_t *nand, loff_t offset) +{ + u_char patterns[] = {0xa5, 0x5a, 0x00}; + struct erase_info instr = { + .mtd = nand, + .addr = offset, + .len = nand->erasesize, + }; + size_t retlen; + int err, ret = -1, i, patt_count; + u_char *buf; + + if ((offset & (nand->erasesize - 1)) != 0) { + puts("Attempt to torture a block at a non block-aligned offset\n"); + return -EINVAL; + } + + if (offset + nand->erasesize > nand->size) { + puts("Attempt to torture a block outside the flash area\n"); + return -EINVAL; + } + + patt_count = ARRAY_SIZE(patterns); + + buf = malloc(nand->erasesize); + if (buf == NULL) { + puts("Out of memory for erase block buffer\n"); + return -ENOMEM; + } + + for (i = 0; i < patt_count; i++) { + err = nand->erase(nand, &instr); + if (err) { + printf("%s: erase() failed for block at 0x%llx: %d\n", + nand->name, instr.addr, err); + goto out; + } + + /* Make sure the block contains only 0xff bytes */ + err = nand->read(nand, offset, nand->erasesize, &retlen, buf); + if ((err && err != -EUCLEAN) || retlen != nand->erasesize) { + printf("%s: read() failed for block at 0x%llx: %d\n", + nand->name, instr.addr, err); + goto out; + } + + err = check_pattern(buf, 0xff, nand->erasesize); + if (!err) { + printf("Erased block at 0x%llx, but a non-0xff byte was found\n", + offset); + ret = -EIO; + goto out; + } + + /* Write a pattern and check it */ + memset(buf, patterns[i], nand->erasesize); + err = nand->write(nand, offset, nand->erasesize, &retlen, buf); + if (err || retlen != nand->erasesize) { + printf("%s: write() failed for block at 0x%llx: %d\n", + nand->name, instr.addr, err); + goto out; + } + + err = nand->read(nand, offset, nand->erasesize, &retlen, buf); + if ((err && err != -EUCLEAN) || retlen != nand->erasesize) { + printf("%s: read() failed for block at 0x%llx: %d\n", + nand->name, instr.addr, err); + goto out; + } + + err = check_pattern(buf, patterns[i], nand->erasesize); + if (!err) { + printf("Pattern 0x%.2x checking failed for block at " + "0x%llx\n", patterns[i], offset); + ret = -EIO; + goto out; + } + } + + ret = 0; + +out: + free(buf); + return ret; +} + +#endif