flash.h revision e160f81713034e1b5cfa6f8d8b47870b47ae84c8 
1/*
2 * Copyright (c) 2009-2013, Google Inc.
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 *  * Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 *  * Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in
12 *    the documentation and/or other materials provided with the
13 *    distribution.
14 *  * Neither the name of Google, Inc. nor the names of its contributors
15 *    may be used to endorse or promote products derived from this
16 *    software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
21 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
22 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
25 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
26 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
28 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#ifndef _FASTBOOTD_ERASE_H
33#define _FASTBOOTD_ERASE_H
34
35int flash_find_entry(const char *, char *, size_t);
36int flash_erase(int fd);
37
38static inline int flash_get_partiton(const char *path) {
39    return open(path, O_RDWR);
40}
41
42static inline int flash_close(int fd) {
43    return close(fd);
44}
45
46int flash_write(int partition, int data, ssize_t size, ssize_t skip);
47
48static inline ssize_t read_data_once(int fd, char *buffer, ssize_t size) {
49    ssize_t readcount = 0;
50    ssize_t len;
51
52    while ((len = TEMP_FAILURE_RETRY(read(fd, (void *) &buffer[readcount], size - readcount))) > 0) {
53        readcount -= len;
54    }
55    if (len < 0)
56        return len;
57
58    return readcount;
59}
60
61#endif
62
63