1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 2010-2012 Semihalf.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD: stable/11/usr.sbin/nandtool/nand_read.c 330449 2018-03-05 07:26:05Z eadler $");
31
32#include <stdio.h>
33#include <stdlib.h>
34#include <unistd.h>
35#include <fcntl.h>
36#include <libgeom.h>
37#include <sys/disk.h>
38#include <dev/nand/nand_dev.h>
39#include "nandtool.h"
40
41int nand_read(struct cmd_param *params)
42{
43	struct chip_param_io chip_params;
44	int fd = -1, out_fd = -1, done = 0, ret = 0;
45	char *dev, *out;
46	int pos, count, mult, block_size;
47	uint8_t *buf = NULL;
48
49	if (!(dev = param_get_string(params, "dev"))) {
50		fprintf(stderr, "You must specify 'dev' parameter\n");
51		return (1);
52	}
53
54	if ((out = param_get_string(params, "out"))) {
55		out_fd = open(out, O_WRONLY|O_CREAT, 0666);
56		if (out_fd == -1) {
57			perrorf("Cannot open %s for writing", out);
58			return (1);
59		}
60	}
61
62	if ((fd = g_open(dev, 1)) == -1) {
63		perrorf("Cannot open %s", dev);
64		ret = 1;
65		goto out;
66	}
67
68	if (ioctl(fd, NAND_IO_GET_CHIP_PARAM, &chip_params) == -1) {
69		perrorf("Cannot ioctl(NAND_IO_GET_CHIP_PARAM)");
70		ret = 1;
71		goto out;
72	}
73
74	block_size = chip_params.page_size * chip_params.pages_per_block;
75
76	if (param_has_value(params, "page")) {
77		pos = chip_params.page_size * param_get_int(params, "page");
78		mult = chip_params.page_size;
79	} else if (param_has_value(params, "block")) {
80		pos = block_size * param_get_int(params, "block");
81		mult = block_size;
82	} else if (param_has_value(params, "pos")) {
83		pos = param_get_int(params, "pos");
84		mult = 1;
85		if (pos % chip_params.page_size) {
86			fprintf(stderr, "Position must be page-size aligned!\n");
87			ret = 1;
88			goto out;
89		}
90	} else {
91		fprintf(stderr, "You must specify one of: 'block', 'page',"
92		    "'pos' arguments\n");
93		ret = 1;
94		goto out;
95	}
96
97	if (!(param_has_value(params, "count")))
98		count = mult;
99	else
100		count = param_get_int(params, "count") * mult;
101
102	if (!(buf = malloc(chip_params.page_size))) {
103		perrorf("Cannot allocate buffer [size %x]",
104		    chip_params.page_size);
105		ret = 1;
106		goto out;
107	}
108
109	lseek(fd, pos, SEEK_SET);
110
111	while (done < count) {
112		if ((ret = read(fd, buf, chip_params.page_size)) !=
113		    (int32_t)chip_params.page_size) {
114			perrorf("read error (read %d bytes)", ret);
115			goto out;
116		}
117
118		if (out_fd != -1) {
119			done += ret;
120			if ((ret = write(out_fd, buf, chip_params.page_size)) !=
121			    (int32_t)chip_params.page_size) {
122				perrorf("write error (written %d bytes)", ret);
123				ret = 1;
124				goto out;
125			}
126		} else {
127			hexdumpoffset(buf, chip_params.page_size, done);
128			done += ret;
129		}
130	}
131
132out:
133	g_close(fd);
134	if (out_fd != -1)
135		close(out_fd);
136	if (buf)
137		free(buf);
138
139	return (ret);
140}
141
142