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
|
/* arch/arm/mach-s5pv210/aries-vibrator.c
*
* Copyright (C) 2010 Samsung Electronics Co. Ltd. All Rights Reserved.
* Author: Rom Lemarchand <rlemarchand@sta.samsung.com>
*
* 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/err.h>
#include <linux/gpio.h>
#include <linux/pwm.h>
#include <linux/wakelock.h>
#include <linux/mutex.h>
#include <linux/clk.h>
#include <linux/workqueue.h>
#include <asm/mach-types.h>
#include <../../../drivers/staging/android/timed_output.h>
#include <mach/gpio-aries.h>
#include <linux/device.h>
#include <linux/miscdevice.h>
#define GPD0_TOUT_1 2 << 4
#ifdef CONFIG_SAMSUNG_VIBRANT
#define PWM_PERIOD (87084 / 2)
#define PWM_DUTY_MAX (87000 / 2)
#else
#define PWM_PERIOD (89284 / 2)
#define PWM_DUTY_MAX (87280 / 2)
#endif
#define MAX_TIMEOUT 10000 /* 10s */
#define PWM_DUTY_MIN 22340
static unsigned int multiplier = (PWM_DUTY_MAX - PWM_DUTY_MIN) / 100;
static unsigned int pwm_duty = 100;
static unsigned int pwm_duty_value = PWM_DUTY_MAX;
static struct vibrator {
struct wake_lock wklock;
struct pwm_device *pwm_dev;
struct hrtimer timer;
struct mutex lock;
struct work_struct work;
} vibdata;
static void aries_vibrator_off(void)
{
pwm_disable(vibdata.pwm_dev);
gpio_direction_output(GPIO_VIBTONE_EN1, GPIO_LEVEL_LOW);
wake_unlock(&vibdata.wklock);
}
static int aries_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 aries_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);
cancel_work_sync(&vibdata.work);
if (value) {
wake_lock(&vibdata.wklock);
pwm_config(vibdata.pwm_dev, pwm_duty_value, PWM_PERIOD);
pwm_enable(vibdata.pwm_dev);
gpio_direction_output(GPIO_VIBTONE_EN1, GPIO_LEVEL_HIGH);
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
aries_vibrator_off();
mutex_unlock(&vibdata.lock);
}
static ssize_t aries_vibrator_set_duty(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t size)
{
sscanf(buf, "%d\n", &pwm_duty);
if (pwm_duty >= 0 && pwm_duty <= 100) pwm_duty_value = (pwm_duty * multiplier) + PWM_DUTY_MIN;
return size;
}
static ssize_t aries_vibrator_show_duty(struct device *dev,
struct device_attribute *attr,
const char *buf)
{
return sprintf(buf, "%d", pwm_duty);
}
static DEVICE_ATTR(pwm_duty, S_IRUGO | S_IWUGO, aries_vibrator_show_duty, aries_vibrator_set_duty);
static struct attribute *pwm_duty_attributes[] = {
&dev_attr_pwm_duty,
NULL
};
static struct attribute_group pwm_duty_group = {
.attrs = pwm_duty_attributes,
};
static struct miscdevice pwm_duty_device = {
.minor = MISC_DYNAMIC_MINOR,
.name = "pwm_duty",
};
static struct timed_output_dev to_dev = {
.name = "vibrator",
.get_time = aries_vibrator_get_time,
.enable = aries_vibrator_enable,
};
static enum hrtimer_restart aries_vibrator_timer_func(struct hrtimer *timer)
{
schedule_work(&vibdata.work);
return HRTIMER_NORESTART;
}
static void aries_vibrator_work(struct work_struct *work)
{
aries_vibrator_off();
}
static int __init aries_init_vibrator(void)
{
int ret = 0;
#ifdef CONFIG_MACH_ARIES
if (!machine_is_aries())
return 0;
#endif
hrtimer_init(&vibdata.timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
vibdata.timer.function = aries_vibrator_timer_func;
INIT_WORK(&vibdata.work, aries_vibrator_work);
ret = gpio_request(GPIO_VIBTONE_EN1, "vibrator-en");
if (ret < 0)
return ret;
s3c_gpio_cfgpin(GPIO_VIBTONE_PWM, GPD0_TOUT_1);
vibdata.pwm_dev = pwm_request(1, "vibrator-pwm");
if (IS_ERR(vibdata.pwm_dev)) {
ret = PTR_ERR(vibdata.pwm_dev);
goto err_pwm_req;
}
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;
if (misc_register(&pwm_duty_device))
printk("%s misc_register(%s) failed\n", __FUNCTION__, pwm_duty_device.name);
else {
if (sysfs_create_group(&pwm_duty_device.this_device->kobj, &pwm_duty_group))
dev_err("failed to create sysfs group for device %s\n", pwm_duty_device.name);
}
return 0;
err_to_dev_reg:
mutex_destroy(&vibdata.lock);
wake_lock_destroy(&vibdata.wklock);
pwm_free(vibdata.pwm_dev);
err_pwm_req:
gpio_free(GPIO_VIBTONE_EN1);
return ret;
}
device_initcall(aries_init_vibrator);
|
