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
|
/* 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.
*/
/* Lid switch module for Chrome EC */
#include "common.h"
#include "console.h"
#include "gpio.h"
#include "hooks.h"
#include "host_command.h"
#include "lid_switch.h"
#include "timer.h"
#include "util.h"
/* Console output macros */
#define CPUTS(outstr) cputs(CC_SWITCH, outstr)
#define CPRINTS(format, args...) cprints(CC_SWITCH, format, ## args)
#define LID_DEBOUNCE_US (30 * MSEC) /* Debounce time for lid switch */
/* if no X-macro is defined for LID switch GPIO, use GPIO_LID_OPEN as default */
#ifndef CONFIG_LID_SWITCH_GPIO_LIST
#define CONFIG_LID_SWITCH_GPIO_LIST LID_GPIO(GPIO_LID_OPEN)
#endif
static int debounced_lid_open; /* Debounced lid state */
static int forced_lid_open; /* Forced lid open */
/**
* Get raw lid switch state.
*
* @return 1 if lid is open, 0 if closed.
*/
static int raw_lid_open(void)
{
#define LID_GPIO(gpio) || gpio_get_level(gpio)
return (forced_lid_open CONFIG_LID_SWITCH_GPIO_LIST) ? 1 : 0;
#undef LID_GPIO
}
/**
* Handle lid open.
*/
static void lid_switch_open(void)
{
if (debounced_lid_open) {
CPRINTS("lid already open");
return;
}
CPRINTS("lid open");
debounced_lid_open = 1;
hook_notify(HOOK_LID_CHANGE);
host_set_single_event(EC_HOST_EVENT_LID_OPEN);
}
/**
* Handle lid close.
*/
static void lid_switch_close(void)
{
if (!debounced_lid_open) {
CPRINTS("lid already closed");
return;
}
CPRINTS("lid close");
debounced_lid_open = 0;
hook_notify(HOOK_LID_CHANGE);
host_set_single_event(EC_HOST_EVENT_LID_CLOSED);
}
test_mockable int lid_is_open(void)
{
return debounced_lid_open;
}
/**
* Lid switch initialization code
*/
static void lid_init(void)
{
if (raw_lid_open())
debounced_lid_open = 1;
/* Enable interrupts, now that we've initialized */
#define LID_GPIO(gpio) gpio_enable_interrupt(gpio);
CONFIG_LID_SWITCH_GPIO_LIST
#undef LID_GPIO
}
DECLARE_HOOK(HOOK_INIT, lid_init, HOOK_PRIO_INIT_LID);
/**
* Handle debounced lid switch changing state.
*/
static void lid_change_deferred(void)
{
const int new_open = raw_lid_open();
/* If lid hasn't changed state, nothing to do */
if (new_open == debounced_lid_open)
return;
if (new_open)
lid_switch_open();
else
lid_switch_close();
}
DECLARE_DEFERRED(lid_change_deferred);
void lid_interrupt(enum gpio_signal signal)
{
/* Reset lid debounce time */
hook_call_deferred(&lid_change_deferred_data, LID_DEBOUNCE_US);
}
static int command_lidopen(int argc, char **argv)
{
lid_switch_open();
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(lidopen, command_lidopen,
NULL,
"Simulate lid open");
static int command_lidclose(int argc, char **argv)
{
lid_switch_close();
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(lidclose, command_lidclose,
NULL,
"Simulate lid close");
static int command_lidstate(int argc, char **argv)
{
ccprintf("lid state: %s\n", debounced_lid_open ? "open" : "closed");
return EC_SUCCESS;
}
DECLARE_CONSOLE_COMMAND(lidstate, command_lidstate,
NULL,
"Get state of lid");
/**
* Host command to enable/disable lid opened.
*/
static int hc_force_lid_open(struct host_cmd_handler_args *args)
{
const struct ec_params_force_lid_open *p = args->params;
/* Override lid open if necessary */
forced_lid_open = p->enabled ? 1 : 0;
/* Make this take effect immediately; no debounce time */
hook_call_deferred(&lid_change_deferred_data, 0);
return EC_RES_SUCCESS;
}
DECLARE_HOST_COMMAND(EC_CMD_FORCE_LID_OPEN, hc_force_lid_open,
EC_VER_MASK(0));
|
