blob: 212ee0a9e99c91fb07d063c45c64fde98bb10c87 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
/* Copyright 2022 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* DFU Boot Manager shared utilities for STM32
*/
#include "bkpdata.h"
#include "clock.h"
#include "dfu_bootmanager_shared.h"
#include "flash.h"
#include "registers.h"
#include "task.h"
/*
* The Servo platforms do not have any free backup regions. The scratchpad
* is only with the console command scratchpad and on some of the tests so
* we'll use the scratchpad region.
*/
#ifdef CONFIG_CMD_SCRATCHPAD
#error "The scratchpad is used, define a backup region for the DFU fields."
#endif /* CONFIG_CMD_SCRATCHPAD */
int dfu_bootmanager_enter_dfu(void)
{
dfu_bootmanager_backup_write(DFU_BOOTMANAGER_VALUE_DFU);
system_reset(0);
return 0;
}
void dfu_bootmanager_clear(void)
{
dfu_bootmanager_backup_write(DFU_BOOTMANAGER_VALUE_CLEAR);
}
void dfu_bootmanager_backup_write(uint8_t value)
{
uint16_t data = DFU_BOOTMANAGER_VALID_CHECK | value;
bkpdata_write(BKPDATA_INDEX_SCRATCHPAD, data);
}
int dfu_bootmanager_backup_read(uint8_t *value)
{
uint16_t data = bkpdata_read(BKPDATA_INDEX_SCRATCHPAD);
uint16_t valid_check = data & DFU_BOOTMANAGER_VALID_MASK;
*value = (uint8_t)(data & DFU_BOOTMANAGER_VALUE_MASK);
if (valid_check != DFU_BOOTMANAGER_VALID_CHECK)
return EC_ERROR_UNKNOWN;
return EC_SUCCESS;
}
|
