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
|
/* arch/arm/mach-omap2/board-espresso-vibrator.c
*
* Copyright (C) 2012 Samsung Electronics Co. Ltd. All Rights Reserved.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/hrtimer.h>
#include <linux/gpio.h>
#include <linux/wakelock.h>
#include <linux/mutex.h>
#include <asm/mach-types.h>
#include <../../../drivers/staging/android/timed_output.h>
#include "mux.h"
#include "board-espresso.h"
#define GPIO_MOTOR_EN 38
#define MAX_TIMEOUT 10000 /* 10sec */
static struct vibrator {
struct wake_lock wklock;
struct hrtimer timer;
struct mutex lock;
bool enabled;
} vibdata;
static void vibrator_off(void)
{
if (!vibdata.enabled)
return;
gpio_set_value(GPIO_MOTOR_EN, 0);
vibdata.enabled = false;
wake_unlock(&vibdata.wklock);
}
static int vibrator_get_time(struct timed_output_dev *dev)
{
if (hrtimer_active(&vibdata.timer)) {
ktime_t r = hrtimer_get_remaining(&vibdata.timer);
return ktime_to_ms(r);
}
return 0;
}
static void vibrator_enable(struct timed_output_dev *dev, int value)
{
mutex_lock(&vibdata.lock);
/* cancel previous timer and set GPIO according to value */
hrtimer_cancel(&vibdata.timer);
if (value) {
wake_lock(&vibdata.wklock);
gpio_set_value(GPIO_MOTOR_EN, 1);
vibdata.enabled = true;
if (value > 0) {
if (value > MAX_TIMEOUT)
value = MAX_TIMEOUT;
hrtimer_start(&vibdata.timer,
ns_to_ktime((u64)value * NSEC_PER_MSEC),
HRTIMER_MODE_REL);
}
} else {
vibrator_off();
}
mutex_unlock(&vibdata.lock);
}
static struct timed_output_dev to_dev = {
.name = "vibrator",
.get_time = vibrator_get_time,
.enable = vibrator_enable,
};
static enum hrtimer_restart vibrator_timer_func(struct hrtimer *timer)
{
vibrator_off();
return HRTIMER_NORESTART;
}
static void __init omap_vibrator_none_pads_cfg_mux(void)
{
omap_mux_write(omap_mux_get("core"),
OMAP_MUX_MODE7 | OMAP_PIN_INPUT_PULLDOWN,
OMAP4_CTRL_MODULE_PAD_GPMC_AD14_OFFSET);
}
static int __init vibrator_init(void)
{
int ret;
vibdata.enabled = false;
hrtimer_init(&vibdata.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
vibdata.timer.function = vibrator_timer_func;
wake_lock_init(&vibdata.wklock, WAKE_LOCK_SUSPEND, "vibrator");
mutex_init(&vibdata.lock);
ret = timed_output_dev_register(&to_dev);
if (ret < 0)
goto err_to_dev_reg;
return 0;
err_to_dev_reg:
mutex_destroy(&vibdata.lock);
wake_lock_destroy(&vibdata.wklock);
return -1;
}
int __init omap4_espresso_vibrator_init(void)
{
int ret;
if (!board_has_modem()) {
omap_vibrator_none_pads_cfg_mux();
return 0;
}
gpio_request_one(GPIO_MOTOR_EN, GPIOF_OUT_INIT_LOW, "MOTOR_EN");
ret = vibrator_init();
if (ret < 0) {
pr_err("vib: vibrator_init fail.");
gpio_free(GPIO_MOTOR_EN);
}
return ret;
}
/*
* This is needed because the vibrator is dependent on omap_dm_timers which get
* initialized at device_init time
*/
late_initcall(omap4_espresso_vibrator_init);
|
