freebsd-skq/usr.sbin/nandtool/nand_read.c

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2010-2012 Semihalf.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <libgeom.h>
#include <sys/disk.h>
#include <dev/nand/nand_dev.h>
#include "nandtool.h"
int nand_read(struct cmd_param *params)
{
struct chip_param_io chip_params;
int fd = -1, out_fd = -1, done = 0, ret = 0;
char *dev, *out;
int pos, count, mult, block_size;
uint8_t *buf = NULL;
if (!(dev = param_get_string(params, "dev"))) {
fprintf(stderr, "You must specify 'dev' parameter\n");
return (1);
}
if ((out = param_get_string(params, "out"))) {
out_fd = open(out, O_WRONLY|O_CREAT, 0666);
if (out_fd == -1) {
perrorf("Cannot open %s for writing", out);
return (1);
}
}
if ((fd = g_open(dev, 1)) == -1) {
perrorf("Cannot open %s", dev);
ret = 1;
goto out;
}
if (ioctl(fd, NAND_IO_GET_CHIP_PARAM, &chip_params) == -1) {
perrorf("Cannot ioctl(NAND_IO_GET_CHIP_PARAM)");
ret = 1;
goto out;
}
block_size = chip_params.page_size * chip_params.pages_per_block;
if (param_has_value(params, "page")) {
pos = chip_params.page_size * param_get_int(params, "page");
mult = chip_params.page_size;
} else if (param_has_value(params, "block")) {
pos = block_size * param_get_int(params, "block");
mult = block_size;
} else if (param_has_value(params, "pos")) {
pos = param_get_int(params, "pos");
mult = 1;
if (pos % chip_params.page_size) {
fprintf(stderr, "Position must be page-size aligned!\n");
ret = 1;
goto out;
}
} else {
fprintf(stderr, "You must specify one of: 'block', 'page',"
"'pos' arguments\n");
ret = 1;
goto out;
}
if (!(param_has_value(params, "count")))
count = mult;
else
count = param_get_int(params, "count") * mult;
if (!(buf = malloc(chip_params.page_size))) {
perrorf("Cannot allocate buffer [size %x]",
chip_params.page_size);
ret = 1;
goto out;
}
lseek(fd, pos, SEEK_SET);
while (done < count) {
if ((ret = read(fd, buf, chip_params.page_size)) !=
(int32_t)chip_params.page_size) {
perrorf("read error (read %d bytes)", ret);
goto out;
}
if (out_fd != -1) {
done += ret;
if ((ret = write(out_fd, buf, chip_params.page_size)) !=
(int32_t)chip_params.page_size) {
perrorf("write error (written %d bytes)", ret);
ret = 1;
goto out;
}
} else {
hexdumpoffset(buf, chip_params.page_size, done);
done += ret;
}
}
out:
g_close(fd);
if (out_fd != -1)
close(out_fd);
if (buf)
free(buf);
return (ret);
}