nand_read.c revision 235537 
1/*-
2 * Copyright (c) 2010-2012 Semihalf.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: head/usr.sbin/nandtool/nand_read.c 235537 2012-05-17 10:11:18Z gber $");
29
30#include <stdio.h>
31#include <stdlib.h>
32#include <unistd.h>
33#include <fcntl.h>
34#include <libgeom.h>
35#include <sys/disk.h>
36#include <dev/nand/nand_dev.h>
37#include "nandtool.h"
38
39int nand_read(struct cmd_param *params)
40{
41	struct chip_param_io chip_params;
42	int fd = -1, out_fd = -1, done = 0, ret = 0;
43	char *dev, *out;
44	int pos, count, mult, block_size;
45	uint8_t *buf = NULL;
46
47	if (!(dev = param_get_string(params, "dev"))) {
48		fprintf(stderr, "You must specify 'dev' parameter\n");
49		return (1);
50	}
51
52	if ((out = param_get_string(params, "out"))) {
53		out_fd = open(out, O_WRONLY|O_CREAT);
54		if (out_fd == -1) {
55			perrorf("Cannot open %s for writing", out);
56			return (1);
57		}
58	}
59
60	if ((fd = g_open(dev, 1)) == -1) {
61		perrorf("Cannot open %s", dev);
62		ret = 1;
63		goto out;
64	}
65
66	if (ioctl(fd, NAND_IO_GET_CHIP_PARAM, &chip_params) == -1) {
67		perrorf("Cannot ioctl(NAND_IO_GET_CHIP_PARAM)");
68		ret = 1;
69		goto out;
70	}
71
72	block_size = chip_params.page_size * chip_params.pages_per_block;
73
74	if (param_has_value(params, "page")) {
75		pos = chip_params.page_size * param_get_int(params, "page");
76		mult = chip_params.page_size;
77	} else if (param_has_value(params, "block")) {
78		pos = block_size * param_get_int(params, "block");
79		mult = block_size;
80	} else if (param_has_value(params, "pos")) {
81		pos = param_get_int(params, "pos");
82		mult = 1;
83		if (pos % chip_params.page_size) {
84			fprintf(stderr, "Position must be page-size aligned!\n");
85			ret = 1;
86			goto out;
87		}
88	} else {
89		fprintf(stderr, "You must specify one of: 'block', 'page',"
90		    "'pos' arguments\n");
91		ret = 1;
92		goto out;
93	}
94
95	if (!(param_has_value(params, "count")))
96		count = mult;
97	else
98		count = param_get_int(params, "count") * mult;
99
100	if (!(buf = malloc(chip_params.page_size))) {
101		perrorf("Cannot allocate buffer [size %x]",
102		    chip_params.page_size);
103		ret = 1;
104		goto out;
105	}
106
107	lseek(fd, pos, SEEK_SET);
108
109	while (done < count) {
110		if ((ret = read(fd, buf, chip_params.page_size)) !=
111		    (int32_t)chip_params.page_size) {
112			perrorf("read error (read %d bytes)", ret);
113			goto out;
114		}
115
116		if (out_fd != -1) {
117			done += ret;
118			if ((ret = write(out_fd, buf, chip_params.page_size)) !=
119			    (int32_t)chip_params.page_size) {
120				perrorf("write error (written %d bytes)", ret);
121				ret = 1;
122				goto out;
123			}
124		} else {
125			hexdumpoffset(buf, chip_params.page_size, done);
126			done += ret;
127		}
128	}
129
130out:
131	g_close(fd);
132	if (out_fd != -1)
133		close(out_fd);
134	if (buf)
135		free(buf);
136
137	return (ret);
138}
139
140