--- /dev/null
+/*
+ * drivers/mtd/nand/nand_util.c
+ *
+ * Copyright (C) 2006 by Weiss-Electronic GmbH.
+ * All rights reserved.
+ *
+ * @author: Guido Classen <clagix@gmail.com>
+ * @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 <dedekind1@gmail.com> from mtd-utils
+ *
+ * Copyright 2010 Freescale Semiconductor
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ */
+
+#include <common.h>
+#include <command.h>
+#include <watchdog.h>
+#include <malloc.h>
+#include <div64.h>
+
+#include <asm/errno.h>
+#include <linux/mtd/mtd.h>
+#include <nand.h>
+#include <jffs2/jffs2.h>
+
+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 meminfo NAND device 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(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 result;
+ int percent_complete = -1;
+ const char *mtd_device = meminfo->name;
+ struct mtd_oob_ops oob_opts;
+ struct nand_chip *chip = meminfo->priv;
+
+ if ((opts->offset & (meminfo->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 = meminfo;
+ erase.len = meminfo->erasesize;
+ erase.addr = opts->offset;
+ 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.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;
+ }
+
+ for (erased_length = 0;
+ erased_length < erase_length;
+ erase.addr += meminfo->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(meminfo, 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(meminfo, &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(meminfo,
+ 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");
+
+ if (opts->scrub)
+ chip->scan_bbt(meminfo);
+
+ return 0;
+}
+
+#ifdef CONFIG_CMD_NAND_LOCK_UNLOCK
+
+/******************************************************************************
+ * 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->priv;
+
+ /* 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->priv;
+
+ /* 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 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, loff_t start, size_t length,
+ int allexcept)
+{
+ int ret = 0;
+ int chipnr;
+ int status;
+ int page;
+ struct nand_chip *chip = mtd->priv;
+
+ 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 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,
+ 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 >= nand->size)
+ return -1;
+
+ block_start = offset & ~(loff_t)(nand->erasesize - 1);
+ block_off = offset & (nand->erasesize - 1);
+ block_len = nand->erasesize - block_off;
+
+ if (!nand_block_isbad(nand, 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 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. 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 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,
+ 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 (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"
+ " in yaffs mode\n");
+ return -EINVAL;
+ }
+ } else
+#endif
+ {
+ blocksize = nand->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 & (nand->writesize - 1)) != 0) {
+ printf("Attempt to write non page-aligned data\n");
+ *length = 0;
+ return -EINVAL;
+ }
+
+ 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");
+ *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(nand, 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 & (nand->erasesize - 1);
+ size_t write_size, truncated_write_size;
+
+ WATCHDOG_RESET();
+
+ 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;
+ }
+
+ if (left_to_write < (blocksize - block_offset))
+ write_size = left_to_write;
+ else
+ write_size = blocksize - block_offset;
+
+#ifdef CONFIG_CMD_NAND_YAFFS
+ if (flags & WITH_YAFFS_OOB) {
+ int page, pages;
+ size_t pagesize = nand->writesize;
+ size_t pagesize_oob = pagesize + nand->oobsize;
+ struct mtd_oob_ops ops;
+
+ ops.len = pagesize;
+ ops.ooblen = nand->oobsize;
+ 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 = mtd_write_oob(nand, offset, &ops);
+ if (rval != 0)
+ break;
+
+ offset += pagesize;
+ p_buffer += pagesize_oob;
+ }
+ }
+ else
+#endif
+ {
+ 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",
+ 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 nand NAND device
+ * @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(nand_info_t *nand, 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 & (nand->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(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");
+ *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);
+ 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 & (nand->erasesize - 1);
+ size_t read_length;
+
+ WATCHDOG_RESET();
+
+ 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;
+ }
+
+ if (left_to_read < (nand->erasesize - block_offset))
+ read_length = left_to_read;
+ else
+ read_length = nand->erasesize - block_offset;
+
+ rval = nand_read(nand, 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 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
Code Review / kvmfornfv.git / blobdiff