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1 /*
2  * Copyright (C) 2008 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef _RECOVERY_BOOTLOADER_H
18 #define _RECOVERY_BOOTLOADER_H
19 
20 /* Bootloader Message
21  *
22  * This structure describes the content of a block in flash
23  * that is used for recovery and the bootloader to talk to
24  * each other.
25  *
26  * The command field is updated by linux when it wants to
27  * reboot into recovery or to update radio or bootloader firmware.
28  * It is also updated by the bootloader when firmware update
29  * is complete (to boot into recovery for any final cleanup)
30  *
31  * The status field is written by the bootloader after the
32  * completion of an "update-radio" or "update-hboot" command.
33  *
34  * The recovery field is only written by linux and used
35  * for the system to send a message to recovery or the
36  * other way around.
37  */
38 struct bootloader_message {
39     char command[32];
40     char status[32];
41     char recovery[1024];
42 };
43 
44 /* Read and write the bootloader command from the "misc" partition.
45  * These return zero on success.
46  */
47 int get_bootloader_message(struct bootloader_message *out);
48 int set_bootloader_message(const struct bootloader_message *in);
49 
50 /* Write an update to the cache partition for update-radio or update-hboot.
51  * Note, this destroys any filesystem on the cache partition!
52  * The expected bitmap format is 240x320, 16bpp (2Bpp), RGB 5:6:5.
53  */
54 int write_update_for_bootloader(
55         const char *update, int update_len,
56         int bitmap_width, int bitmap_height, int bitmap_bpp,
57         const char *busy_bitmap, const char *error_bitmap);
58 
59 #endif
60