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("$FreeBSD$");
29
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <unistd.h>
33 #include <sys/types.h>
34 #include <sys/disk.h>
35 #include <libgeom.h>
36 #include <dev/nand/nand_dev.h>
37 #include "nandtool.h"
38
nand_erase(struct cmd_param * params)39 int nand_erase(struct cmd_param *params)
40 {
41 struct chip_param_io chip_params;
42 char *dev;
43 int fd = -1, ret = 0;
44 off_t pos, count;
45 off_t start, nblocks, i;
46 int block_size, mult;
47
48 if (!(dev = param_get_string(params, "dev"))) {
49 fprintf(stderr, "Please supply valid 'dev' parameter.\n");
50 return (1);
51 }
52
53 if (param_has_value(params, "count"))
54 count = param_get_intx(params, "count");
55 else
56 count = 1;
57
58 if ((fd = g_open(dev, 1)) < 0) {
59 perrorf("Cannot open %s", dev);
60 return (1);
61 }
62
63 if (ioctl(fd, NAND_IO_GET_CHIP_PARAM, &chip_params) == -1) {
64 perrorf("Cannot ioctl(NAND_IO_GET_CHIP_PARAM)");
65 ret = 1;
66 goto out;
67 }
68
69 block_size = chip_params.page_size * chip_params.pages_per_block;
70
71 if (param_has_value(params, "page")) {
72 pos = chip_params.page_size * param_get_intx(params, "page");
73 mult = chip_params.page_size;
74 } else if (param_has_value(params, "block")) {
75 pos = block_size * param_get_intx(params, "block");
76 mult = block_size;
77 } else if (param_has_value(params, "pos")) {
78 pos = param_get_intx(params, "pos");
79 mult = 1;
80 } else {
81 /* Erase whole chip */
82 if (ioctl(fd, DIOCGMEDIASIZE, &count) == -1) {
83 ret = 1;
84 goto out;
85 }
86
87 pos = 0;
88 mult = 1;
89 }
90
91 if (pos % block_size) {
92 fprintf(stderr, "Position must be block-size aligned!\n");
93 ret = 1;
94 goto out;
95 }
96
97 count *= mult;
98 start = pos / block_size;
99 nblocks = count / block_size;
100
101 for (i = 0; i < nblocks; i++) {
102 if (g_delete(fd, (start + i) * block_size, block_size) == -1) {
103 perrorf("Cannot erase block %d - probably a bad block",
104 start + i);
105 ret = 1;
106 }
107 }
108
109 out:
110 g_close(fd);
111
112 return (ret);
113 }
114
115