一: 振动器系统结构和移植内容
振动器负责控制引动电话的振动功能,Android中的振动器系统是一个专供这方面功能的小系统,提供根据时间振动的功能。
振动器系统包含了驱动程序、硬件抽象层、JNI部分、Java框架类等几个部分,也向Java应用程序层提供了简单的API作为平台接口。
Android振动器系统的基本层次结构如图23-1所示。
图23-1 Android振动器系统的基本层次结构
1 振动器部分的结构
Android振动器系统自下而上包含了驱动程序、振动器系统硬件抽象层、振动器系统Java框架类、Java框架中振动器系统使用等几个部分,其结构如图23-2所示。
图23-2 Android振动器系统的结构
自下而上,Android的振动器系统分成了以下部分。
(1)驱动程序:特定硬件平台振动器的驱动程序,通常基于Android的Timed Output驱动框架实现
(2)硬件抽象层
光系统硬件抽象层接口路径为:hardware/libhardware_legacy/include/hardware_legacy/ vibrator.h
振动器系统的硬件抽象层在Android中已经具有默认实现,代码路径:
hardware/libhardware_legacy/vibrator/vibrator.c
振动器的硬件抽象层通常并不需要重新实现,是libhardware_legacy.so的一部分。
(3)JNI部分
代码路径:frameworks/base/services/jni/com_android_server_VibratorService.cpp
这个类是振动器的JNI部分,通过调用硬件抽象层向上层提供接口。
(4)Java部分
代码路径:
frameworks/base/services/java/com/android/server/VibratorService.java
frameworks/base/core/java/android/os/Vibrator.java
VibratorService.java通过调用,VibratorService JNI来实现com.android.server包中的VibratorService类。这个类不是平台的API,被Android系统Java框架中的一小部分调用。
Vibrator.java文件实现了android.os包中的Vibrator类,这是向Java层提供的API。
2 移植内容
针对特定的硬件平台,振动器系统的移植有两种方法。
第一种方法(通常情况):由于已经具有硬件抽象层,振动器系统的移植只需要实现驱动程序即可。这个驱动程序需要基于Android内核中的Timed Output驱动框架。
第二种方法:根据自己实现的驱动程序,重新实现振动器的硬件抽象层定义接口(需要在libhardware_legacy.so库中),由于振动器硬件抽象层的接口非常简单,因此这种实现方式也不会很复杂。
二: 移植与调试的要点
1 驱动程序
vibrator驱动提供上层接口有很多种,这里介绍两种方式:一种是timeout方式,一种是属性节点。
一、timeout方式
Vibrator的驱动程序只需要实现振动的接口即可,这是一个输出设备,需要接受振动时间作为参数。由于比较简单,因此Vibrator的驱动程序可以使用多种方式来实现。
在Android中,推荐基于Android内核定义Timed Output驱动程序框架来实现Vibrator的驱动程序。
Timed Output的含义为定时输出,用于定时发出某个输出。实际上,这种驱动程序依然是基于sys文件系统来完成的。
drivers/staging/android/目录timed_output.h中定义timed_output_dev结构体,其中包含enable和get_time这两个函数指针,实现结构体后,使用timed_output_dev_register()和timed_output_dev_unregister()函数注册和注销即可。
Timed Output驱动程序框架将为每个设备在/sys/class/timed_output/目录中建立一个子目录,设备子目录中的enable文件就是设备的控制文件。读enable文件表示获得剩余时间,写这个文件表示根据时间振动。
Timed Output驱动的设备调试,通过sys文件系统即可。
对于Vibrator设备,其实现的Timed Output驱动程序的名称应该为“vibrator”。因此Vibrator设备在sys文件系统中的方法如下所示:
# echo "10000" > /sys/class/timed_output/vibrator/enable
# cat /sys/class/timed_output/vibrator/enable
3290
# echo "0" > /sys/class/timed_output/vibrator/enable
对于enable文件,“写”表示使能指定的时间,“读”表示获取剩余时间。
二 文件属性节点
这种方法就是直接用kernel sys系统创建文件节点,提供上层接口,直接操作底层gpio口或者PWM等控制器。
2 硬件抽象层的内容
2.1 硬件抽象层的接口
Vibrator硬件抽象层的接口在hardware/libhardware_legacy/include/hardware_legacy/目录的vibrator.h文件中定义:
int vibrator_on(int timeout_ms); // 开始振动
int vibrator_off(); // 关闭振动
vibrator.h文件中定义两个接口,分别表示振动和关闭,振动开始以毫秒(ms)作为时间单位。
提示:Timed Output类型驱动本身有获得剩余时间的能力(读enable文件),但是在Android Vibrator硬件抽象层以上的各层接口都没有使用这个功能。
2.2 标准硬件抽象层的实现
Vibrator硬件抽象层具有标准的实现,在hardware/libhardware_legacy/vibrator/目录的vibrator.c中。
其中实现的核心内容为sendit()函数,这个函数的内容如下所示:
- #define THE_DEVICE "/sys/class/timed_output/vibrator/enable"
- static int sendit(int timeout_ms)
- {
- int nwr, ret, fd;
- char value[20];
- #ifdef QEMU_HARDWARE // 使用QEMU的情况
- if (qemu_check()) {
- return qemu_control_command( "vibrator:%d", timeout_ms );
- }
- #endif
- fd = open(THE_DEVICE, O_RDWR); // 读取sys文件系统中的内容
- if(fd < 0) return errno;
- nwr = sprintf(value, "%d\n", timeout_ms);
- ret = write(fd, value, nwr);
- close(fd);
- return (ret == nwr) ? 0 : -1;
- }
#define THE_DEVICE "/sys/class/timed_output/vibrator/enable"
static int sendit(int timeout_ms)
{
int nwr, ret, fd;
char value[20];
#ifdef QEMU_HARDWARE // 使用QEMU的情况
if (qemu_check()) {
return qemu_control_command( "vibrator:%d", timeout_ms );
}
#endif
fd = open(THE_DEVICE, O_RDWR); // 读取sys文件系统中的内容
if(fd < 0) return errno;
nwr = sprintf(value, "%d\n", timeout_ms);
ret = write(fd, value, nwr);
close(fd);
return (ret == nwr) ? 0 : -1;
}
sendit()函数负责根据时间“振动”:在真实的硬件中,通过sys文件系统的文件进行控制;如果是模拟器环境则通过QEMU发送命令。
vibrator_on()调用sendit()以时间作为参数,vibrator_on()调用sendit()以0作为参数。
上层的情况和注意事项
frameworks/base/services/jni/目录中的com_android_server_VibratorService.cpp文件是Vibrator硬件抽象层的调用者,它同时也向Java提供JNI支持。
其中,为JNI定义的方法列表如下所示:
- static JNINativeMethod method_table[] = {
- { "vibratorOn", "(J)V", (void*)vibratorOn }, // 振动器开
- { "vibratorOff", "()V", (void*)vibratorOff } // 振动器关
- };
- int register_android_server_VibratorService(JNIEnv *env) {
- return jniRegisterNativeMethods(env, "com/android/server/VibratorService",
- method_table, NELEM(method_table));
- }
- //vibratorOn()和vibratorOff()这两个函数的实现分别如下所示:
- static void vibratorOn(JNIEnv *env, jobject clazz, jlong timeout_ms){
- vibrator_on(timeout_ms);
- }
- static void vibratorOff(JNIEnv *env, jobject clazz){
- vibrator_off();
- }
static JNINativeMethod method_table[] = {
{ "vibratorOn", "(J)V", (void*)vibratorOn }, // 振动器开
{ "vibratorOff", "()V", (void*)vibratorOff } // 振动器关
};
int register_android_server_VibratorService(JNIEnv *env) {
return jniRegisterNativeMethods(env, "com/android/server/VibratorService",
method_table, NELEM(method_table));
}
//vibratorOn()和vibratorOff()这两个函数的实现分别如下所示:
static void vibratorOn(JNIEnv *env, jobject clazz, jlong timeout_ms){
vibrator_on(timeout_ms);
}
static void vibratorOff(JNIEnv *env, jobject clazz){
vibrator_off();
}
frameworks/base/services/java/com/android/server/目录中的VibratorService.java通过调用VibratorService JNI来实现com.android.server包中的VibratorService类。
frameworks/base/core/java/android/os/目录中的Vibrator.java文件实现了android.os包中的Vibrator类。它通过调用vibrator的Java服务来实现(获得名称为vibrator的服务),配合同目录中的IVibratorService.aidl文件向应用程序层提供Vibrator的相关API。
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
我具体的驱动程序
- #include <linux/init.h>
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/types.h>
- #include <linux/device.h>
- #include <linux/workqueue.h>
- #include "timed_output.h"
- #include <linux/hrtimer.h>
- #include <linux/err.h>
- #include <linux/platform_device.h>
- #include <linux/spinlock.h>
- #include <linux/jiffies.h>
- #include <linux/timer.h>
- #include <mach/mt_typedefs.h>
- #include <mach/mt_pll.h>
- #include <mach/mt_gpt.h>
- #define VERSION "v 0.1"
- #define VIB_DEVICE "mt_vibrator"
- #define COUNT_DOWN_TIME 50
- #define VIBR_HRTIMER
- #ifndef VIBR_HRTIMER
- XGPT_NUM Vibrator_XGPT = XGPT7;
- #endif
- /******************************************************************************
- Error Code No.
- ******************************************************************************/
- #define RSUCCESS 0
- /******************************************************************************
- Debug Message Settings
- ******************************************************************************/
- /* Debug message event */
- #define DBG_EVT_NONE 0x00000000 /* No event */
- #define DBG_EVT_INT 0x00000001 /* Interrupt related event */
- #define DBG_EVT_TASKLET 0x00000002 /* Tasklet related event */
- #define DBG_EVT_ALL 0xffffffff
- #define DBG_EVT_MASK (DBG_EVT_TASKLET)
- #if 1
- #define MSG(evt, fmt, args...) \
- do { \
- if ((DBG_EVT_##evt) & DBG_EVT_MASK) { \
- printk(fmt, ##args); \
- } \
- } while(0)
- #define MSG_FUNC_ENTRY(f) MSG(FUC, "<FUN_ENT>: %s\n", __FUNCTION__)
- #else
- #define MSG(evt, fmt, args...) do{}while(0)
- #define MSG_FUNC_ENTRY(f) do{}while(0)
- #endif
- #define VIBR_CON0 ((volatile unsigned long*)(0xF702F7B0))
- static int vibr_Enable(void)
- {
- printk("[vibrator]vibr_Enable \n");
- hwPowerOn(MT_POWER_LDO_VIBR, VOL_2800 , "VIBR");
- return 0;
- }
- static int vibr_Disable(void)
- {
- while((INREG32(VIBR_CON0)&1))
- {
- printk("[vibrator]vibr_Disable \n");
- hwPowerDown(MT_POWER_LDO_VIBR , "VIBR");
- //printk("[vibrator]vibr_Disable:VIBR_CON0=0x%x \r\n", INREG32(VIBR_CON0));
- }
- return 0;
- }
- /******************************************************************************
- Global Definations
- ******************************************************************************/
- //static struct work_struct vibrator_work;
- static struct hrtimer vibe_timer;
- static spinlock_t vibe_lock;
- static int vibrator_get_time(struct timed_output_dev *dev)
- {
- if (hrtimer_active(&vibe_timer))
- {
- ktime_t r = hrtimer_get_remaining(&vibe_timer);
- return r.tv.sec * 1000 + r.tv.nsec / 1000000;
- }
- else
- return 0;
- }
- static void vibrator_enable(struct timed_output_dev *dev, int value)
- {
- unsigned long flags;
- spin_lock_irqsave(&vibe_lock, flags);
- #ifdef VIBR_HRTIMER
- while(hrtimer_cancel(&vibe_timer))
- {
- printk("[vibrator]vibrator_enable: try to cancel hrtimer \n");
- }
- #else
- XGPT_Reset(Vibrator_XGPT);
- #endif
- if (value == 0)
- {
- printk("[vibrator]vibrator_enable: disable \n");
- vibr_Disable();
- }
- else
- {
- value = ((value > 15000) ? 15000 : value);
- printk("[vibrator]vibrator_enable: vibrator start: %d \n", value);
- #ifdef VIBR_HRTIMER
- hrtimer_start(&vibe_timer,
- ktime_set(value / 1000, (value % 1000) * 1000000),
- HRTIMER_MODE_REL);
- #else
- XGPT_CONFIG config;
- config.num = Vibrator_XGPT;
- config.clkDiv = 0;
- config.mode = XGPT_ONE_SHOT;
- config.bIrqEnable = TRUE;
- config.u4Compare = value*32768/1000;
- if(!XGPT_Config(config))
- {
- printk("[vibrator]vibrator_enable: config XGPT: %d fail!\n", value);
- }
- XGPT_Start(Vibrator_XGPT);
- #endif
- vibr_Enable();
- }
- spin_unlock_irqrestore(&vibe_lock, flags);
- }
- #ifdef VIBR_HRTIMER
- static enum hrtimer_restart vibrator_timer_func(struct hrtimer *timer)
- {
- printk("[vibrator]vibrator_timer_func: vibrator will disable \n");
- vibr_Disable();
- return HRTIMER_NORESTART;
- }
- #else
- void vibrator_timer_func(UINT16 temp)
- {
- printk("[vibrator]vibrator_timer_func: vibrator will disable \n");
- vibr_Disable();
- }
- #endif
- static struct timed_output_dev mt_vibrator =
- {
- .name = "vibrator",
- .get_time = vibrator_get_time,
- .enable = vibrator_enable,
- };
- static int vib_probe(struct platform_device *pdev)
- {
- return 0;
- }
- static int vib_remove(struct platform_device *pdev)
- {
- return 0;
- }
- static void vib_shutdown(struct platform_device *pdev)
- {
- vibr_Disable();
- }
- /******************************************************************************
- Device driver structure
- *****************************************************************************/
- static struct platform_driver vibrator_driver =
- {
- .probe = vib_probe,
- .remove = vib_remove,
- .shutdown = vib_shutdown,
- .driver = {
- .name = VIB_DEVICE,
- },
- };
- static ssize_t store_vibr_on(struct device *dev,struct device_attribute *attr, const char *buf, size_t size)
- {
- if(buf != NULL && size != 0)
- {
- printk("[vibrator]buf is %s and size is %d \n",buf,size);
- if(buf[0]== '0')
- {
- vibr_Disable();
- }else
- {
- vibr_Enable();
- }
- }
- return size;
- }
- static DEVICE_ATTR(vibr_on, 0664, NULL, store_vibr_on);
- /******************************************************************************
- * vib_mod_init
- *
- * DESCRIPTION:
- * Register the vibrator device driver !
- *
- * PARAMETERS:
- * None
- *
- * RETURNS:
- * None
- *
- * NOTES:
- * RSUCCESS : Success
- *
- ******************************************************************************/
- static s32 __devinit vib_mod_init(void)
- {
- s32 ret;
- printk("Mk MT vibrator driver register, version %s\n", VERSION);
- spin_lock_init(&vibe_lock);
- #ifdef VIBR_HRTIMER
- hrtimer_init(&vibe_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
- vibe_timer.function = vibrator_timer_func;
- #else
- XGPT_Init(Vibrator_XGPT, vibrator_timer_func);
- #endif
- timed_output_dev_register(&mt_vibrator);
- ret = platform_driver_register(&vibrator_driver);
- if(ret)
- {
- printk("[vibrator]Unable to register vibrator driver (%d)\n", ret);
- return ret;
- }
- ret = device_create_file(mt_vibrator.dev,&dev_attr_vibr_on);
- if(ret)
- {
- printk("[vibrator]device_create_file vibr_on fail! \n");
- }
- printk("[vibrator]vib_mod_init Done \n");
- return RSUCCESS;
- }
- /******************************************************************************
- * vib_mod_exit
- *
- * DESCRIPTION:
- * Free the device driver !
- *
- * PARAMETERS:
- * None
- *
- * RETURNS:
- * None
- *
- * NOTES:
- * None
- *
- ******************************************************************************/
- static void __exit vib_mod_exit(void)
- {
- printk("Mk MT vibrator driver unregister, version %s \n", VERSION);
- printk("[vibrator]vib_mod_exit Done \n");
- }
- module_init(vib_mod_init);
- module_exit(vib_mod_exit);
- MODULE_AUTHOR("Mk Inc.");
- MODULE_DESCRIPTION("MT Vibrator Driver (VIB)");
- MODULE_LICENSE("GPL");
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/device.h>
#include <linux/workqueue.h>
#include "timed_output.h"
#include <linux/hrtimer.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
#include <linux/jiffies.h>
#include <linux/timer.h>
#include <mach/mt_typedefs.h>
#include <mach/mt_pll.h>
#include <mach/mt_gpt.h>
#define VERSION "v 0.1"
#define VIB_DEVICE "mt_vibrator"
#define COUNT_DOWN_TIME 50
#define VIBR_HRTIMER
#ifndef VIBR_HRTIMER
XGPT_NUM Vibrator_XGPT = XGPT7;
#endif
/******************************************************************************
Error Code No.
******************************************************************************/
#define RSUCCESS 0
/******************************************************************************
Debug Message Settings
******************************************************************************/
/* Debug message event */
#define DBG_EVT_NONE 0x00000000 /* No event */
#define DBG_EVT_INT 0x00000001 /* Interrupt related event */
#define DBG_EVT_TASKLET 0x00000002 /* Tasklet related event */
#define DBG_EVT_ALL 0xffffffff
#define DBG_EVT_MASK (DBG_EVT_TASKLET)
#if 1
#define MSG(evt, fmt, args...) \
do { \
if ((DBG_EVT_##evt) & DBG_EVT_MASK) { \
printk(fmt, ##args); \
} \
} while(0)
#define MSG_FUNC_ENTRY(f) MSG(FUC, "<FUN_ENT>: %s\n", __FUNCTION__)
#else
#define MSG(evt, fmt, args...) do{}while(0)
#define MSG_FUNC_ENTRY(f) do{}while(0)
#endif
#define VIBR_CON0 ((volatile unsigned long*)(0xF702F7B0))
static int vibr_Enable(void)
{
printk("[vibrator]vibr_Enable \n");
hwPowerOn(MT_POWER_LDO_VIBR, VOL_2800 , "VIBR");
return 0;
}
static int vibr_Disable(void)
{
while((INREG32(VIBR_CON0)&1))
{
printk("[vibrator]vibr_Disable \n");
hwPowerDown(MT_POWER_LDO_VIBR , "VIBR");
//printk("[vibrator]vibr_Disable:VIBR_CON0=0x%x \r\n", INREG32(VIBR_CON0));
}
return 0;
}
/******************************************************************************
Global Definations
******************************************************************************/
//static struct work_struct vibrator_work;
static struct hrtimer vibe_timer;
static spinlock_t vibe_lock;
static int vibrator_get_time(struct timed_output_dev *dev)
{
if (hrtimer_active(&vibe_timer))
{
ktime_t r = hrtimer_get_remaining(&vibe_timer);
return r.tv.sec * 1000 + r.tv.nsec / 1000000;
}
else
return 0;
}
static void vibrator_enable(struct timed_output_dev *dev, int value)
{
unsigned long flags;
spin_lock_irqsave(&vibe_lock, flags);
#ifdef VIBR_HRTIMER
while(hrtimer_cancel(&vibe_timer))
{
printk("[vibrator]vibrator_enable: try to cancel hrtimer \n");
}
#else
XGPT_Reset(Vibrator_XGPT);
#endif
if (value == 0)
{
printk("[vibrator]vibrator_enable: disable \n");
vibr_Disable();
}
else
{
value = ((value > 15000) ? 15000 : value);
printk("[vibrator]vibrator_enable: vibrator start: %d \n", value);
#ifdef VIBR_HRTIMER
hrtimer_start(&vibe_timer,
ktime_set(value / 1000, (value % 1000) * 1000000),
HRTIMER_MODE_REL);
#else
XGPT_CONFIG config;
config.num = Vibrator_XGPT;
config.clkDiv = 0;
config.mode = XGPT_ONE_SHOT;
config.bIrqEnable = TRUE;
config.u4Compare = value*32768/1000;
if(!XGPT_Config(config))
{
printk("[vibrator]vibrator_enable: config XGPT: %d fail!\n", value);
}
XGPT_Start(Vibrator_XGPT);
#endif
vibr_Enable();
}
spin_unlock_irqrestore(&vibe_lock, flags);
}
#ifdef VIBR_HRTIMER
static enum hrtimer_restart vibrator_timer_func(struct hrtimer *timer)
{
printk("[vibrator]vibrator_timer_func: vibrator will disable \n");
vibr_Disable();
return HRTIMER_NORESTART;
}
#else
void vibrator_timer_func(UINT16 temp)
{
printk("[vibrator]vibrator_timer_func: vibrator will disable \n");
vibr_Disable();
}
#endif
static struct timed_output_dev mt_vibrator =
{
.name = "vibrator",
.get_time = vibrator_get_time,
.enable = vibrator_enable,
};
static int vib_probe(struct platform_device *pdev)
{
return 0;
}
static int vib_remove(struct platform_device *pdev)
{
return 0;
}
static void vib_shutdown(struct platform_device *pdev)
{
vibr_Disable();
}
/******************************************************************************
Device driver structure
*****************************************************************************/
static struct platform_driver vibrator_driver =
{
.probe = vib_probe,
.remove = vib_remove,
.shutdown = vib_shutdown,
.driver = {
.name = VIB_DEVICE,
},
};
static ssize_t store_vibr_on(struct device *dev,struct device_attribute *attr, const char *buf, size_t size)
{
if(buf != NULL && size != 0)
{
printk("[vibrator]buf is %s and size is %d \n",buf,size);
if(buf[0]== '0')
{
vibr_Disable();
}else
{
vibr_Enable();
}
}
return size;
}
static DEVICE_ATTR(vibr_on, 0664, NULL, store_vibr_on);
/******************************************************************************
* vib_mod_init
*
* DESCRIPTION:
* Register the vibrator device driver !
*
* PARAMETERS:
* None
*
* RETURNS:
* None
*
* NOTES:
* RSUCCESS : Success
*
******************************************************************************/
static s32 __devinit vib_mod_init(void)
{
s32 ret;
printk("Mk MT vibrator driver register, version %s\n", VERSION);
spin_lock_init(&vibe_lock);
#ifdef VIBR_HRTIMER
hrtimer_init(&vibe_timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
vibe_timer.function = vibrator_timer_func;
#else
XGPT_Init(Vibrator_XGPT, vibrator_timer_func);
#endif
timed_output_dev_register(&mt_vibrator);
ret = platform_driver_register(&vibrator_driver);
if(ret)
{
printk("[vibrator]Unable to register vibrator driver (%d)\n", ret);
return ret;
}
ret = device_create_file(mt_vibrator.dev,&dev_attr_vibr_on);
if(ret)
{
printk("[vibrator]device_create_file vibr_on fail! \n");
}
printk("[vibrator]vib_mod_init Done \n");
return RSUCCESS;
}
/******************************************************************************
* vib_mod_exit
*
* DESCRIPTION:
* Free the device driver !
*
* PARAMETERS:
* None
*
* RETURNS:
* None
*
* NOTES:
* None
*
******************************************************************************/
static void __exit vib_mod_exit(void)
{
printk("Mk MT vibrator driver unregister, version %s \n", VERSION);
printk("[vibrator]vib_mod_exit Done \n");
}
module_init(vib_mod_init);
module_exit(vib_mod_exit);
MODULE_AUTHOR("Mk Inc.");
MODULE_DESCRIPTION("MT Vibrator Driver (VIB)");
MODULE_LICENSE("GPL");
<P><STRONG>SYS文件系统方式的驱动程序</STRONG></P>
#include <linux/module.h> #include <linux/jiffies.h> #include <linux/platform_device.h> #include <linux/workqueue.h> #include <linux/delay.h> #include <linux/gpio.h> #include <linux/i2c.h> #include <linux/lnw_gpio.h> #include <asm/intel-mid.h>
#define VIBRA_ENABLE_GPIO 91
struct vibra_info { int enabled; struct mutex lock; struct device *dev; const char *name; int gpio_en; };
/* Enable's vibra driver */ static void vibra_enable(struct vibra_info *info) { mutex_lock(&info->lock); gpio_set_value(info->gpio_en, 1); info->enabled = true; mutex_unlock(&info->lock); }
static void vibra_disable(struct vibra_info *info) { mutex_lock(&info->lock); gpio_set_value(info->gpio_en, 0); info->enabled = false; mutex_unlock(&info->lock); }
/****************************************************************************** * SYSFS * ******************************************************************************/
static ssize_t vibra_show_vibrator(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { struct vibra_info *info = dev_get_drvdata(dev);
return sprintf(buf, "%d\n", info->enabled);
}
static ssize_t vibra_set_vibrator(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { long vibrator_enable; struct vibra_info *info = dev_get_drvdata(dev);
if (kstrtol(buf, 10, &vibrator_enable)) return -EINVAL; else if (vibrator_enable == 0) vibra_disable(info); else if (vibrator_enable == 1) vibra_enable(info); else return -EINVAL; return size; }
static DEVICE_ATTR(vibrator, S_IWUSR | S_IRUGO, vibra_show_vibrator,vibra_set_vibrator);
static struct attribute *gpio_vibra_attrs[] = { &dev_attr_vibrator.attr, NULL, };
static struct attribute_group gpio_vibra_attr_group = { .attrs = gpio_vibra_attrs, };
#if CONFIG_PM static int vibra_runtime_suspend(struct device *dev) { printk("In %s\n", __func__); return 0; }
static int vibra_runtime_resume(struct device *dev) { printk("In %s\n", __func__); return 0; }
static const struct dev_pm_ops intel_mid_vibra_pm_ops = { .suspend = vibra_runtime_suspend, .resume = vibra_runtime_resume, };
#endif
static int __devinit gpio_vibra_probe(struct platform_device *pdev) { struct vibra_info *info; struct mid_vibra_probe *data; int ret = 0; info = kzalloc(sizeof(*info), GFP_KERNEL); if (!info) return -ENOMEM;
info->gpio_en = VIBRA_ENABLE_GPIO; printk("using gpios en: %d", info->gpio_en); ret = gpio_request_one(info->gpio_en, GPIOF_DIR_OUT, "VIBRA ENABLE"); if (ret != 0) { pr_err("gpio_request(%d) fails:%d\n", info->gpio_en, ret); goto out; }
info->name = "intel_mid:vibrator"; mutex_init(&info->lock);
ret = sysfs_create_group(&pdev->dev.kobj, &gpio_vibra_attr_group); if (ret) { pr_err("Unable to export keys/switches, error: %d\n",ret); goto do_freegpio_vibra_enable; }
platform_set_drvdata(pdev, info);
return ret; do_freegpio_vibra_enable: sysfs_remove_group(&pdev->dev.kobj, &gpio_vibra_attr_group); gpio_free(info->gpio_en); out: return ret; }
static void __devexit gpio_vibra_remove(struct platform_device *pdev) { struct vibra_info *info = platform_get_drvdata(pdev); gpio_free(info->gpio_en); sysfs_remove_group(&pdev->dev.kobj, &gpio_vibra_attr_group); }
static struct of_device_id gpio_vibra_of_match[] = { { .compatible = "gpio-vibra", }, { }, }; MODULE_DEVICE_TABLE(of, gpio_vibra_of_match);
static struct platform_driver gpio_vibra_device_driver = { .probe = gpio_vibra_probe, .remove = __devexit_p(gpio_vibra_remove), .driver = { .name = "gpio-vibra", .owner = THIS_MODULE, #ifdef CONFIG_PM_SLEEP .pm = &intel_mid_vibra_pm_ops, #endif .of_match_table = gpio_vibra_of_match,
} };
static int __init gpio_vibra_init(void) { int ret = 0;
ret = platform_driver_register(&gpio_vibra_device_driver); if (ret) pr_err("vib driver register failed\n"); return ret; } static void __exit gpio_vibra_exit(void) { platform_driver_unregister(&gpio_vibra_device_driver); printk("intel_mid_vibra driver exited\n"); return; }
static struct platform_device vb_device = { .name = "gpio-vibra", .id = -1, .dev = { .platform_data = NULL,//&gpio_keys, }, };
static int __init vibra_platform_init(void) { return platform_device_register(&vb_device); }
late_initcall(vibra_platform_init);
module_init(gpio_vibra_init); module_exit(gpio_vibra_exit);
MODULE_ALIAS("gpio:intel_mid_vibra"); MODULE_DESCRIPTION("gpio control Vibra driver"); MODULE_LICENSE("GPL v2");