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/12/usr.sbin/nandtool/nand_erase.c 326276 2017-11-27 15:37:16Z pfg $");
31
32 #include <stdio.h>
33 #include <stdlib.h>
34 #include <unistd.h>
35 #include <sys/types.h>
36 #include <sys/disk.h>
37 #include <libgeom.h>
38 #include <dev/nand/nand_dev.h>
39 #include "nandtool.h"
40
nand_erase(struct cmd_param * params)41 int nand_erase(struct cmd_param *params)
42 {
43 struct chip_param_io chip_params;
44 char *dev;
45 int fd = -1, ret = 0;
46 off_t pos, count;
47 off_t start, nblocks, i;
48 int block_size, mult;
49
50 if (!(dev = param_get_string(params, "dev"))) {
51 fprintf(stderr, "Please supply valid 'dev' parameter.\n");
52 return (1);
53 }
54
55 if (param_has_value(params, "count"))
56 count = param_get_intx(params, "count");
57 else
58 count = 1;
59
60 if ((fd = g_open(dev, 1)) < 0) {
61 perrorf("Cannot open %s", dev);
62 return (1);
63 }
64
65 if (ioctl(fd, NAND_IO_GET_CHIP_PARAM, &chip_params) == -1) {
66 perrorf("Cannot ioctl(NAND_IO_GET_CHIP_PARAM)");
67 ret = 1;
68 goto out;
69 }
70
71 block_size = chip_params.page_size * chip_params.pages_per_block;
72
73 if (param_has_value(params, "page")) {
74 pos = chip_params.page_size * param_get_intx(params, "page");
75 mult = chip_params.page_size;
76 } else if (param_has_value(params, "block")) {
77 pos = block_size * param_get_intx(params, "block");
78 mult = block_size;
79 } else if (param_has_value(params, "pos")) {
80 pos = param_get_intx(params, "pos");
81 mult = 1;
82 } else {
83 /* Erase whole chip */
84 if (ioctl(fd, DIOCGMEDIASIZE, &count) == -1) {
85 ret = 1;
86 goto out;
87 }
88
89 pos = 0;
90 mult = 1;
91 }
92
93 if (pos % block_size) {
94 fprintf(stderr, "Position must be block-size aligned!\n");
95 ret = 1;
96 goto out;
97 }
98
99 count *= mult;
100 start = pos / block_size;
101 nblocks = count / block_size;
102
103 for (i = 0; i < nblocks; i++) {
104 if (g_delete(fd, (start + i) * block_size, block_size) == -1) {
105 perrorf("Cannot erase block %d - probably a bad block",
106 start + i);
107 ret = 1;
108 }
109 }
110
111 out:
112 g_close(fd);
113
114 return (ret);
115 }
116
117