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: releng/11.0/usr.sbin/nandtool/nand_erase.c 235537 2012-05-17 10:11:18Z gber $");
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
39int 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
109out:
110	g_close(fd);
111
112	return (ret);
113}
114
115