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
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
|
/* Copyright 2021 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include <zephyr/logging/log.h>
#include <zephyr/kernel.h>
#include "console.h"
#include "drivers/cros_rtc.h"
#include "hooks.h"
#include "host_command.h"
#include "system.h"
#include "util.h"
LOG_MODULE_REGISTER(shim_cros_rtc, LOG_LEVEL_ERR);
#define CROS_RTC_NODE DT_CHOSEN(cros_rtc)
static const struct device *cros_rtc_dev;
#ifdef CONFIG_HOSTCMD_EVENTS
static void set_rtc_host_event(void)
{
host_set_single_event(EC_HOST_EVENT_RTC);
}
DECLARE_DEFERRED(set_rtc_host_event);
#endif
void rtc_callback(const struct device *dev)
{
ARG_UNUSED(dev);
if (IS_ENABLED(CONFIG_HOSTCMD_EVENTS)) {
hook_call_deferred(&set_rtc_host_event_data, 0);
}
}
/** Initialize the rtc. */
static int system_init_rtc(const struct device *unused)
{
ARG_UNUSED(unused);
cros_rtc_dev = DEVICE_DT_GET(CROS_RTC_NODE);
if (!cros_rtc_dev) {
LOG_ERR("Error: device %s is not ready", cros_rtc_dev->name);
return -ENODEV;
}
/* set the RTC callback */
cros_rtc_configure(cros_rtc_dev, rtc_callback);
return 0;
}
SYS_INIT(system_init_rtc, APPLICATION, 1);
uint32_t system_get_rtc_sec(void)
{
uint32_t seconds;
cros_rtc_get_value(cros_rtc_dev, &seconds);
return seconds;
}
void system_set_rtc(uint32_t seconds)
{
cros_rtc_set_value(cros_rtc_dev, seconds);
}
void system_reset_rtc_alarm(void)
{
if (!cros_rtc_dev) {
/* TODO(b/183115086): check the error handler for NULL device */
LOG_ERR("rtc_dev hasn't initialized.");
return;
}
cros_rtc_reset_alarm(cros_rtc_dev);
}
/*
* For NPCX series, The alarm counter only stores wakeup time in seconds.
* Microseconds will be ignored.
*/
void system_set_rtc_alarm(uint32_t seconds, uint32_t microseconds)
{
if (!cros_rtc_dev) {
LOG_ERR("rtc_dev hasn't initialized.");
return;
}
/* If time = 0, clear the current alarm */
if (seconds == EC_RTC_ALARM_CLEAR && microseconds == 0) {
system_reset_rtc_alarm();
return;
}
seconds += system_get_rtc_sec();
cros_rtc_set_alarm(cros_rtc_dev, seconds, microseconds);
}
/*
* Return the seconds remaining before the RTC alarm goes off.
* Returns 0 if alarm is not set.
*/
uint32_t system_get_rtc_alarm(void)
{
uint32_t seconds, microseconds;
cros_rtc_get_alarm(cros_rtc_dev, &seconds, µseconds);
/*
* Return 0:
* 1. If alarm is not set to go off, OR
* 2. If alarm is set and has already gone off
*/
if (seconds == 0) {
return 0;
}
return seconds - system_get_rtc_sec();
}
/* Console commands */
void print_system_rtc(enum console_channel ch)
{
uint32_t sec = system_get_rtc_sec();
cprintf(ch, "RTC: 0x%08x (%d.00 s)\n", sec, sec);
}
/*
* TODO(b/179055201): This is similar to the same function in some of the
* chip-specific code. We should factor out the common parts.
*/
#ifdef CONFIG_PLATFORM_EC_CONSOLE_CMD_RTC
static int command_system_rtc(int argc, const char **argv)
{
if (argc == 3 && !strcasecmp(argv[1], "set")) {
char *e;
unsigned int t = strtoi(argv[2], &e, 0);
if (*e)
return EC_ERROR_PARAM2;
system_set_rtc(t);
} else if (argc > 1) {
return EC_ERROR_INVAL;
}
print_system_rtc(CC_COMMAND);
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(rtc, command_system_rtc, "[set <seconds>]",
"Get/set real-time clock");
#ifdef CONFIG_PLATFORM_EC_CONSOLE_CMD_RTC_ALARM
/**
* Test the RTC alarm by setting an interrupt on RTC match.
*/
static int command_rtc_alarm_test(int argc, const char **argv)
{
int s = 1, us = 0;
char *e;
if (argc > 1) {
s = strtoi(argv[1], &e, 10);
if (*e)
return EC_ERROR_PARAM1;
}
if (argc > 2) {
us = strtoi(argv[2], &e, 10);
if (*e)
return EC_ERROR_PARAM2;
}
ccprintf("Setting RTC alarm\n");
system_set_rtc_alarm(s, us);
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(rtc_alarm, command_rtc_alarm_test,
"[seconds [microseconds]]", "Test alarm");
#endif /* CONFIG_PLATFORM_EC_CONSOLE_CMD_RTC_ALARM */
#endif /* CONFIG_PLATFORM_EC_CONSOLE_CMD_RTC */
#ifdef CONFIG_PLATFORM_EC_HOSTCMD_RTC
static enum ec_status system_rtc_get_value(struct host_cmd_handler_args *args)
{
struct ec_response_rtc *r = args->response;
r->time = system_get_rtc_sec();
args->response_size = sizeof(*r);
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_RTC_GET_VALUE, system_rtc_get_value,
EC_VER_MASK(0));
static enum ec_status system_rtc_set_value(struct host_cmd_handler_args *args)
{
const struct ec_params_rtc *p = args->params;
system_set_rtc(p->time);
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_RTC_SET_VALUE, system_rtc_set_value,
EC_VER_MASK(0));
static enum ec_status system_rtc_set_alarm(struct host_cmd_handler_args *args)
{
const struct ec_params_rtc *p = args->params;
system_set_rtc_alarm(p->time, 0);
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_RTC_SET_ALARM, system_rtc_set_alarm,
EC_VER_MASK(0));
static enum ec_status system_rtc_get_alarm(struct host_cmd_handler_args *args)
{
struct ec_response_rtc *r = args->response;
r->time = system_get_rtc_alarm();
args->response_size = sizeof(*r);
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_RTC_GET_ALARM, system_rtc_get_alarm,
EC_VER_MASK(0));
#endif /* CONFIG_PLATFORM_EC_HOSTCMD_RTC */
|
