From a430fa06a4ac50e785fdbfb7f43c3cb14b35619c Mon Sep 17 00:00:00 2001 From: Miquel Raynal Date: Thu, 16 Aug 2018 17:30:07 +0200 Subject: mtd: move NAND files into a raw/ subdirectory NAND flavors, like serial and parallel, have a lot in common and would benefit to share code. Let's move raw (parallel) NAND specific code in a raw/ subdirectory, to ease the addition of a core file in nand/ and the introduction of a spi/ subdirectory specific to SPI NANDs. Signed-off-by: Miquel Raynal --- drivers/mtd/nand/raw/nand_util.c | 904 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 904 insertions(+) create mode 100644 drivers/mtd/nand/raw/nand_util.c (limited to 'drivers/mtd/nand/raw/nand_util.c') diff --git a/drivers/mtd/nand/raw/nand_util.c b/drivers/mtd/nand/raw/nand_util.c new file mode 100644 index 0000000000..fc2235c1a0 --- /dev/null +++ b/drivers/mtd/nand/raw/nand_util.c @@ -0,0 +1,904 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * drivers/mtd/nand/raw/nand_util.c + * + * Copyright (C) 2006 by Weiss-Electronic GmbH. + * All rights reserved. + * + * @author: Guido Classen + * @descr: NAND Flash support + * @references: borrowed heavily from Linux mtd-utils code: + * flash_eraseall.c by Arcom Control System Ltd + * nandwrite.c by Steven J. Hill (sjhill@realitydiluted.com) + * and Thomas Gleixner (tglx@linutronix.de) + * + * Copyright (C) 2008 Nokia Corporation: drop_ffs() function by + * Artem Bityutskiy from mtd-utils + * + * Copyright 2010 Freescale Semiconductor + */ + +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +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) + +/** + * nand_erase_opts: - erase NAND flash with support for various options + * (jffs2 formatting) + * + * @param mtd nand mtd instance to erase + * @param opts options, @see struct nand_erase_options + * @return 0 in case of success + * + * This code is ported from flash_eraseall.c from Linux mtd utils by + * Arcom Control System Ltd. + */ +int nand_erase_opts(struct mtd_info *mtd, + const nand_erase_options_t *opts) +{ + struct jffs2_unknown_node cleanmarker; + erase_info_t erase; + unsigned long erase_length, erased_length; /* in blocks */ + int result; + int percent_complete = -1; + const char *mtd_device = mtd->name; + struct mtd_oob_ops oob_opts; + struct nand_chip *chip = mtd_to_nand(mtd); + + if ((opts->offset & (mtd->erasesize - 1)) != 0) { + printf("Attempt to erase non block-aligned data\n"); + return -1; + } + + memset(&erase, 0, sizeof(erase)); + memset(&oob_opts, 0, sizeof(oob_opts)); + + erase.mtd = mtd; + erase.len = mtd->erasesize; + erase.addr = opts->offset; + erase_length = lldiv(opts->length + mtd->erasesize - 1, + mtd->erasesize); + + 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 + * check from erase() method, set block check method to dummy + * and disable bad block table while erasing. + */ + if (opts->scrub) { + erase.scrub = opts->scrub; + /* + * We don't need the bad block table anymore... + * after scrub, there are no bad blocks left! + */ + if (chip->bbt) { + kfree(chip->bbt); + } + chip->bbt = NULL; + chip->options &= ~NAND_BBT_SCANNED; + } + + for (erased_length = 0; + erased_length < erase_length; + erase.addr += mtd->erasesize) { + + WATCHDOG_RESET(); + + 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(mtd, erase.addr); + if (ret > 0) { + if (!opts->quiet) + printf("\rSkipping bad block at " + "0x%08llx " + " \n", + erase.addr); + + if (!opts->spread) + erased_length++; + + continue; + + } else if (ret < 0) { + printf("\n%s: MTD get bad block failed: %d\n", + mtd_device, + ret); + return -1; + } + } + + erased_length++; + + result = mtd_erase(mtd, &erase); + if (result != 0) { + printf("\n%s: MTD Erase failure: %d\n", + mtd_device, result); + continue; + } + + /* format for JFFS2 ? */ + if (opts->jffs2 && chip->ecc.layout->oobavail >= 8) { + 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(mtd, erase.addr, &ops); + if (result != 0) { + printf("\n%s: MTD writeoob failure: %d\n", + mtd_device, result); + continue; + } + } + + if (!opts->quiet) { + unsigned long long n = erased_length * 100ULL; + int percent; + + do_div(n, erase_length); + percent = (int)n; + + /* output progress message only at whole percent + * steps to reduce the number of messages printed + * on (slow) serial consoles + */ + if (percent != percent_complete) { + percent_complete = percent; + + printf("\rErasing at 0x%llx -- %3d%% complete.", + erase.addr, percent); + + if (opts->jffs2 && result == 0) + printf(" Cleanmarker written at 0x%llx.", + erase.addr); + } + } + } + if (!opts->quiet) + printf("\n"); + + 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 + *****************************************************************************/ + +/** + * nand_lock: Set all pages of NAND flash chip to the LOCK or LOCK-TIGHT + * state + * + * @param mtd nand mtd instance + * @param tight bring device in lock tight mode + * + * @return 0 on success, -1 in case of error + * + * The lock / lock-tight command only applies to the whole chip. To get some + * parts of the chip lock and others unlocked use the following sequence: + * + * - Lock all pages of the chip using nand_lock(mtd, 0) (or the lockpre pin) + * - Call nand_unlock() once for each consecutive area to be unlocked + * - If desired: Bring the chip to the lock-tight state using nand_lock(mtd, 1) + * + * If the device is in lock-tight state software can't change the + * current active lock/unlock state of all pages. nand_lock() / nand_unlock() + * calls will fail. It is only posible to leave lock-tight state by + * an hardware signal (low pulse on _WP pin) or by power down. + */ +int nand_lock(struct mtd_info *mtd, int tight) +{ + int ret = 0; + int status; + struct nand_chip *chip = mtd_to_nand(mtd); + + /* 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); + + /* call wait ready function */ + status = chip->waitfunc(mtd, chip); + + /* see if device thinks it succeeded */ + if (status & 0x01) { + ret = -1; + } + + out: + /* de-select the NAND device */ + chip->select_chip(mtd, -1); + return ret; +} + +/** + * nand_get_lock_status: - query current lock state from one page of NAND + * flash + * + * @param mtd nand mtd instance + * @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_UNLOCK: page unlocked + * + */ +int nand_get_lock_status(struct mtd_info *mtd, loff_t offset) +{ + int ret = 0; + int chipnr; + int page; + struct nand_chip *chip = mtd_to_nand(mtd); + + /* select the NAND device */ + chipnr = (int)(offset >> chip->chip_shift); + chip->select_chip(mtd, chipnr); + + + if ((offset & (mtd->writesize - 1)) != 0) { + printf("nand_get_lock_status: " + "Start address must be beginning of " + "nand page!\n"); + ret = -1; + goto out; + } + + /* check the Lock Status */ + page = (int)(offset >> chip->page_shift); + chip->cmdfunc(mtd, NAND_CMD_LOCK_STATUS, -1, page & chip->pagemask); + + ret = chip->read_byte(mtd) & (NAND_LOCK_STATUS_TIGHT + | NAND_LOCK_STATUS_UNLOCK); + + out: + /* de-select the NAND device */ + chip->select_chip(mtd, -1); + return ret; +} + +/** + * nand_unlock: - Unlock area of NAND pages + * only one consecutive area can be unlocked at one time! + * + * @param mtd nand mtd instance + * @param start start byte address + * @param length number of bytes to unlock (must be a multiple of + * page size mtd->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, loff_t start, size_t length, + int allexcept) +{ + int ret = 0; + int chipnr; + int status; + int page; + struct nand_chip *chip = mtd_to_nand(mtd); + + debug("nand_unlock%s: start: %08llx, length: %zd!\n", + allexcept ? " (allexcept)" : "", start, length); + + /* select the NAND device */ + chipnr = (int)(start >> chip->chip_shift); + chip->select_chip(mtd, chipnr); + + /* 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"); + 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 " + "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 " + "size %08x!\n", mtd->erasesize); + ret = -1; + goto out; + } + + /* + * Set length so that the last address is set to the + * starting address of the last block + */ + length -= mtd->erasesize; + + /* submit address of first page to unlock */ + 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 */ + status = chip->waitfunc(mtd, chip); + /* see if device thinks it succeeded */ + if (status & 0x01) { + /* there was an error */ + ret = -1; + goto out; + } + + out: + /* de-select the NAND device */ + chip->select_chip(mtd, -1); + return ret; +} +#endif + +/** + * check_skip_len + * + * Check if there are any bad blocks, and whether length including bad + * blocks fits into device + * + * @param mtd nand mtd instance + * @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(struct mtd_info *mtd, loff_t offset, size_t length, + size_t *used) +{ + size_t len_excl_bad = 0; + int ret = 0; + + while (len_excl_bad < length) { + size_t block_len, block_off; + loff_t block_start; + + if (offset >= mtd->size) + return -1; + + block_start = offset & ~(loff_t)(mtd->erasesize - 1); + block_off = offset & (mtd->erasesize - 1); + block_len = mtd->erasesize - block_off; + + if (!nand_block_isbad(mtd, block_start)) + len_excl_bad += block_len; + else + 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 struct mtd_info *mtd, 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 + mtd->writesize - 1) / mtd->writesize; + l *= mtd->writesize; + + /* + * since the input length may be unaligned, prevent access past the end + * of the buffer + */ + return min(l, *len); +} +#endif + +/** + * nand_verify_page_oob: + * + * Verify a page of NAND flash, including the OOB. + * Reads page of NAND and verifies the contents and OOB against the + * values in ops. + * + * @param mtd nand mtd instance + * @param ops MTD operations, including data to verify + * @param ofs offset in flash + * @return 0 in case of success + */ +int nand_verify_page_oob(struct mtd_info *mtd, struct mtd_oob_ops *ops, + loff_t ofs) +{ + int rval; + struct mtd_oob_ops vops; + size_t verlen = mtd->writesize + mtd->oobsize; + + memcpy(&vops, ops, sizeof(vops)); + + vops.datbuf = memalign(ARCH_DMA_MINALIGN, verlen); + + if (!vops.datbuf) + return -ENOMEM; + + vops.oobbuf = vops.datbuf + mtd->writesize; + + rval = mtd_read_oob(mtd, ofs, &vops); + if (!rval) + rval = memcmp(ops->datbuf, vops.datbuf, vops.len); + if (!rval) + rval = memcmp(ops->oobbuf, vops.oobbuf, vops.ooblen); + + free(vops.datbuf); + + return rval ? -EIO : 0; +} + +/** + * nand_verify: + * + * Verify a region of NAND flash. + * Reads NAND in page-sized chunks and verifies the contents against + * the contents of a buffer. The offset into the NAND must be + * page-aligned, and the function doesn't handle skipping bad blocks. + * + * @param mtd nand mtd instance + * @param ofs offset in flash + * @param len buffer length + * @param buf buffer to read from + * @return 0 in case of success + */ +int nand_verify(struct mtd_info *mtd, loff_t ofs, size_t len, u_char *buf) +{ + int rval = 0; + size_t verofs; + size_t verlen = mtd->writesize; + uint8_t *verbuf = memalign(ARCH_DMA_MINALIGN, verlen); + + if (!verbuf) + return -ENOMEM; + + /* Read the NAND back in page-size groups to limit malloc size */ + for (verofs = ofs; verofs < ofs + len; + verofs += verlen, buf += verlen) { + verlen = min(mtd->writesize, (uint32_t)(ofs + len - verofs)); + rval = nand_read(mtd, verofs, &verlen, verbuf); + if (!rval || (rval == -EUCLEAN)) + rval = memcmp(buf, verbuf, verlen); + + if (rval) + break; + } + + free(verbuf); + + return rval ? -EIO : 0; +} + + + +/** + * 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. 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 mtd nand mtd instance + * @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 flags flags modifying the behaviour of the write to NAND + * @return 0 in case of success + */ +int nand_write_skip_bad(struct mtd_info *mtd, loff_t offset, size_t *length, + 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; + + blocksize = mtd->erasesize; + + /* + * nand_write() handles unaligned, partial page writes. + * + * We allow length to be unaligned, for convenience in + * using the $filesize variable. + * + * However, starting at an unaligned offset makes the + * semantics of bad block skipping ambiguous (really, + * you should only start a block skipping access at a + * partition boundary). So don't try to handle that. + */ + if ((offset & (mtd->writesize - 1)) != 0) { + printf("Attempt to write non page-aligned data\n"); + *length = 0; + return -EINVAL; + } + + need_skip = check_skip_len(mtd, offset, *length, &used_for_write); + + if (actual) + *actual = used_for_write; + + if (need_skip < 0) { + printf("Attempt to write outside the flash area\n"); + *length = 0; + return -EINVAL; + } + + 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(mtd, offset, length, buffer); + + if ((flags & WITH_WR_VERIFY) && !rval) + rval = nand_verify(mtd, offset, *length, buffer); + + if (rval == 0) + return 0; + + *length = 0; + printf("NAND write to offset %llx failed %d\n", + offset, rval); + return rval; + } + + while (left_to_write > 0) { + size_t block_offset = offset & (mtd->erasesize - 1); + size_t write_size, truncated_write_size; + + WATCHDOG_RESET(); + + if (nand_block_isbad(mtd, offset & ~(mtd->erasesize - 1))) { + printf("Skip bad block 0x%08llx\n", + offset & ~(mtd->erasesize - 1)); + offset += mtd->erasesize - block_offset; + continue; + } + + if (left_to_write < (blocksize - block_offset)) + write_size = left_to_write; + else + write_size = blocksize - block_offset; + + truncated_write_size = write_size; +#ifdef CONFIG_CMD_NAND_TRIMFFS + if (flags & WITH_DROP_FFS) + truncated_write_size = drop_ffs(mtd, p_buffer, + &write_size); +#endif + + rval = nand_write(mtd, offset, &truncated_write_size, + p_buffer); + + if ((flags & WITH_WR_VERIFY) && !rval) + rval = nand_verify(mtd, 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", + offset, rval); + *length -= left_to_write; + return rval; + } + + left_to_write -= write_size; + } + + return 0; +} + +/** + * nand_read_skip_bad: + * + * Read image from NAND flash. + * 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 mtd nand mtd instance + * @param offset offset in flash + * @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(struct mtd_info *mtd, loff_t offset, size_t *length, + 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 & (mtd->writesize - 1)) != 0) { + printf("Attempt to read non page-aligned data\n"); + *length = 0; + if (actual) + *actual = 0; + return -EINVAL; + } + + need_skip = check_skip_len(mtd, offset, *length, &used_for_read); + + if (actual) + *actual = used_for_read; + + if (need_skip < 0) { + 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(mtd, offset, length, buffer); + if (!rval || rval == -EUCLEAN) + return 0; + + *length = 0; + printf("NAND read from offset %llx failed %d\n", + offset, rval); + return rval; + } + + while (left_to_read > 0) { + size_t block_offset = offset & (mtd->erasesize - 1); + size_t read_length; + + WATCHDOG_RESET(); + + if (nand_block_isbad(mtd, offset & ~(mtd->erasesize - 1))) { + printf("Skipping bad block 0x%08llx\n", + offset & ~(mtd->erasesize - 1)); + offset += mtd->erasesize - block_offset; + continue; + } + + if (left_to_read < (mtd->erasesize - block_offset)) + read_length = left_to_read; + else + read_length = mtd->erasesize - block_offset; + + rval = nand_read(mtd, offset, &read_length, p_buffer); + if (rval && rval != -EUCLEAN) { + printf("NAND read from offset %llx failed %d\n", + offset, rval); + *length -= left_to_read; + return rval; + } + + left_to_read -= read_length; + offset += read_length; + p_buffer += read_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 mtd nand mtd instance + * @param offset offset in flash + * @return 0 if the block is still good + */ +int nand_torture(struct mtd_info *mtd, loff_t offset) +{ + u_char patterns[] = {0xa5, 0x5a, 0x00}; + struct erase_info instr = { + .mtd = mtd, + .addr = offset, + .len = mtd->erasesize, + }; + size_t retlen; + int err, ret = -1, i, patt_count; + u_char *buf; + + if ((offset & (mtd->erasesize - 1)) != 0) { + puts("Attempt to torture a block at a non block-aligned offset\n"); + return -EINVAL; + } + + if (offset + mtd->erasesize > mtd->size) { + puts("Attempt to torture a block outside the flash area\n"); + return -EINVAL; + } + + patt_count = ARRAY_SIZE(patterns); + + buf = malloc_cache_aligned(mtd->erasesize); + if (buf == NULL) { + puts("Out of memory for erase block buffer\n"); + return -ENOMEM; + } + + for (i = 0; i < patt_count; i++) { + err = mtd_erase(mtd, &instr); + if (err) { + printf("%s: erase() failed for block at 0x%llx: %d\n", + mtd->name, instr.addr, err); + goto out; + } + + /* Make sure the block contains only 0xff bytes */ + err = mtd_read(mtd, offset, mtd->erasesize, &retlen, buf); + if ((err && err != -EUCLEAN) || retlen != mtd->erasesize) { + printf("%s: read() failed for block at 0x%llx: %d\n", + mtd->name, instr.addr, err); + goto out; + } + + err = check_pattern(buf, 0xff, mtd->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], mtd->erasesize); + err = mtd_write(mtd, offset, mtd->erasesize, &retlen, buf); + if (err || retlen != mtd->erasesize) { + printf("%s: write() failed for block at 0x%llx: %d\n", + mtd->name, instr.addr, err); + goto out; + } + + err = mtd_read(mtd, offset, mtd->erasesize, &retlen, buf); + if ((err && err != -EUCLEAN) || retlen != mtd->erasesize) { + printf("%s: read() failed for block at 0x%llx: %d\n", + mtd->name, instr.addr, err); + goto out; + } + + err = check_pattern(buf, patterns[i], mtd->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 -- cgit