tsiry-sandratraina.com
A modern Music Player Daemon based on Rockbox open source high quality audio player
libadwaita
audio
rust
zig
deno
mpris
rockbox
mpd
1/***************************************************************************
2 * __________ __ ___.
3 * Open \______ \ ____ ____ | | _\_ |__ _______ ___
4 * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
5 * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
6 * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
7 * \/ \/ \/ \/ \/
8 *
9 * Copyright (C) 2024 by William Wilgus
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version 2
14 * of the License, or (at your option) any later version.
15 *
16 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
17 * KIND, either express or implied.
18 *
19 ****************************************************************************/
20
21#include "devicedata.h"
22#include "crc32.h"
23#include <stddef.h>
24#include <string.h>
25#include "debug.h"
26
27#ifndef BOOTLOADER
28void verify_device_data(void) INIT_ATTR;
29void verify_device_data(void)
30{
31 DEBUGF("%s", __func__);
32 /* verify payload with checksum */
33 uint32_t crc = crc_32(device_data.payload, device_data.length, 0xffffffff);
34 if (crc == device_data.crc)
35 return; /* return if data is valid */
36
37 /* Write the default if data is invalid */
38 memset(device_data.payload, 0xff, DEVICE_DATA_PAYLOAD_SIZE); /* Invalid data */
39 device_data.length = DEVICE_DATA_PAYLOAD_SIZE;
40 device_data.crc = crc_32(device_data.payload, device_data.length, 0xffffffff);
41
42}
43
44/******************************************************************************/
45#endif /* ndef BOOTLOADER ******************************************************/
46/******************************************************************************/
47
48#if defined(HAVE_DEVICEDATA)
49void __attribute__((weak)) fill_devicedata(struct device_data_t *data)
50{
51 memset(data->payload, 0xff, data->length);
52}
53#endif
54
55/* Write bootdata into location in FIRMWARE marked by magic header
56 * Assumes buffer is already loaded with the firmware image
57 * We just need to find the location and write data into the
58 * payload region along with the crc for later verification and use.
59 * Returns payload len on success,
60 * On error returns false
61 */
62bool write_devicedata(unsigned char* buf, int len)
63{
64 int search_len = MIN(len, DEVICE_DATA_SEARCH_SIZE) - sizeof(struct device_data_t);
65
66 /* search for decvice data header prior to search_len */
67 for(int i = 0; i < search_len; i++)
68 {
69 struct device_data_t *data = (struct device_data_t *)&buf[i];
70 if (data->magic[0] != DEVICE_DATA_MAGIC0 ||
71 data->magic[1] != DEVICE_DATA_MAGIC1)
72 continue;
73
74 /* Ignore it if the length extends past the end of the buffer. */
75 int data_len = offsetof(struct device_data_t, payload) + data->length;
76 if (i + data_len > len)
77 continue;
78
79 fill_devicedata(data);
80
81 /* Calculate payload CRC */
82 data->crc = crc_32(data->payload, data->length, 0xffffffff);
83 return true;
84 }
85
86 return false;
87}
88