blob: f0cb9ddd736e9f37118c657074c2d52ef974fd8a (
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
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
/* Copyright (c) 2013 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.
*/
/* System module for Chrome EC : hardware specific implementation */
#include "console.h"
#include "cpu.h"
#include "flash.h"
#include "registers.h"
#include "system.h"
#include "task.h"
#include "util.h"
#include "version.h"
#include "watchdog.h"
/* Battery backed RAM indices. */
enum system_bram_indices {
BRAM_INDEX_SAVED_RESET_FLAGS = 0, /* uses 4 bytes */
};
void system_hibernate(uint32_t seconds, uint32_t microseconds)
{
/* TODO(crosbug.com/p/23575): IMPLEMENT ME ! */
}
static void check_reset_cause(void)
{
uint32_t flags = 0;
uint8_t raw_reset_cause = IT83XX_GCTRL_RSTS & 0x03;
uint8_t raw_reset_cause2 = IT83XX_GCTRL_SPCTRL4 & 0x07;
/* Clear reset cause. */
IT83XX_GCTRL_RSTS |= 0x03;
IT83XX_GCTRL_SPCTRL4 |= 0x07;
/* Determine if watchdog reset or power on reset. */
if (raw_reset_cause & 0x02) {
flags |= RESET_FLAG_WATCHDOG;
} else if (raw_reset_cause & 0x01) {
flags |= RESET_FLAG_POWER_ON;
} else {
if ((IT83XX_GCTRL_RSTS & 0xC0) == 0x80)
flags |= RESET_FLAG_POWER_ON;
}
if (raw_reset_cause2 & 0x04)
flags |= RESET_FLAG_POWER_ON;
/* Restore then clear saved reset flags. */
if (!(flags & RESET_FLAG_POWER_ON)) {
const uint32_t addr =
IT83XX_BRAM_BASE+BRAM_INDEX_SAVED_RESET_FLAGS;
flags |= REG8(addr + 0) << 24;
flags |= REG8(addr + 1) << 16;
flags |= REG8(addr + 2) << 8;
flags |= REG8(addr + 3);
}
REG8(IT83XX_BRAM_BASE+BRAM_INDEX_SAVED_RESET_FLAGS) = 0;
REG8(IT83XX_BRAM_BASE+BRAM_INDEX_SAVED_RESET_FLAGS+1) = 0;
REG8(IT83XX_BRAM_BASE+BRAM_INDEX_SAVED_RESET_FLAGS+2) = 0;
REG8(IT83XX_BRAM_BASE+BRAM_INDEX_SAVED_RESET_FLAGS+3) = 0;
system_set_reset_flags(flags);
}
int gpio_is_reboot_warm(void)
{
uint32_t reset_flags;
/*
* Check reset cause here,
* gpio_pre_init is executed faster than system_pre_init
*/
check_reset_cause();
reset_flags = system_get_reset_flags();
if ((reset_flags & RESET_FLAG_RESET_PIN) ||
(reset_flags & RESET_FLAG_POWER_ON) ||
(reset_flags & RESET_FLAG_WATCHDOG) ||
(reset_flags & RESET_FLAG_HARD) ||
(reset_flags & RESET_FLAG_SOFT))
return 0;
else
return 1;
}
void system_pre_init(void)
{
/* TODO(crosbug.com/p/23575): IMPLEMENT ME ! */
}
void system_reset(int flags)
{
uint32_t save_flags = 0;
/* Disable interrupts to avoid task swaps during reboot. */
interrupt_disable();
/* Save current reset reasons if necessary */
if (flags & SYSTEM_RESET_PRESERVE_FLAGS)
save_flags = system_get_reset_flags() | RESET_FLAG_PRESERVED;
/* Add in AP off flag into saved flags. */
if (flags & SYSTEM_RESET_LEAVE_AP_OFF)
save_flags |= RESET_FLAG_AP_OFF;
/* Store flags to battery backed RAM. */
REG8(IT83XX_BRAM_BASE+BRAM_INDEX_SAVED_RESET_FLAGS) = save_flags >> 24;
REG8(IT83XX_BRAM_BASE+BRAM_INDEX_SAVED_RESET_FLAGS+1) =
(save_flags >> 16) & 0xff;
REG8(IT83XX_BRAM_BASE+BRAM_INDEX_SAVED_RESET_FLAGS+2) =
(save_flags >> 8) & 0xff;
REG8(IT83XX_BRAM_BASE+BRAM_INDEX_SAVED_RESET_FLAGS+3) =
save_flags & 0xff;
/*
* Writing invalid key to watchdog module triggers a soft reset. For
* now this is the only option, no hard reset.
*/
IT83XX_ETWD_ETWCFG |= 0x20;
IT83XX_ETWD_EWDKEYR = 0x00;
/* Spin and wait for reboot; should never return */
while (1)
;
}
int system_set_scratchpad(uint32_t value)
{
/* TODO(crosbug.com/p/23575): IMPLEMENT ME ! */
return 0;
}
uint32_t system_get_scratchpad(void)
{
/* TODO(crosbug.com/p/23575): IMPLEMENT ME ! */
return 0;
}
const char *system_get_chip_vendor(void)
{
return "ite";
}
const char *system_get_chip_name(void)
{
return "it83xx";
}
const char *system_get_chip_revision(void)
{
return "";
}
int system_get_vbnvcontext(uint8_t *block)
{
/* TODO(crosbug.com/p/23575): IMPLEMENT ME ! */
return EC_SUCCESS;
}
int system_set_vbnvcontext(const uint8_t *block)
{
/* TODO(crosbug.com/p/23575): IMPLEMENT ME ! */
return EC_SUCCESS;
}
int system_set_console_force_enabled(int val)
{
/* TODO(crosbug.com/p/23575): IMPLEMENT ME ! */
return 0;
}
int system_get_console_force_enabled(void)
{
/* TODO(crosbug.com/p/23575): IMPLEMENT ME ! */
return 0;
}
uintptr_t system_get_fw_reset_vector(uintptr_t base)
{
uintptr_t reset_vector, num;
num = *(uintptr_t *)base;
reset_vector = ((num>>24)&0xff) | ((num<<8)&0xff0000) |
((num>>8)&0xff00) | ((num<<24)&0xff000000);
reset_vector = ((reset_vector & 0xffffff) << 1) + base;
return reset_vector;
}
|
