四联光电智能照明论坛

标题: Linux下矩阵键盘驱动 [打印本页]

作者: 冬青 时间: 2017-2-27 15:00
标题: Linux下矩阵键盘驱动
http://blog.csdn.net/heqiuya/article/details/8499484

[cpp] view plain copy
/* butt_drv.h */
//……

typedef struct _st_key_info_matrix    /* 按键数据结构 */
{
unsigned char key_id;             /* 按键ID */
unsigned int irq_no;                /* 对应的中断号 */
unsigned int irq_gpio_port;       /* 对应的中断线的输入端口地址*/
unsigned int kscan_gpio_port;       /* 对应的KSCAN端口地址 */
} st_key_info_matrix;

typedef struct _st_key_buffer          /* 按键缓冲数据结构 */
{
unsigned long jiffy[MAX_KEY_COUNT]; /* 按键时间, 5秒钟以前的铵键作废*/
unsigned char buf[MAX_KEY_COUNT];    /* 按键缓冲区 */
unsigned int head,tail;             /* 按键缓冲区头和尾 */
} st_key_buffer;
//……

//下面是矩阵按键数组的定义，数组元素的信息（一个按键信息）按照0行0列，0行1列，…，3行2列，3行3列的顺序逐行排列。
static st_key_info_matrix key_info_matrix[MAX_COLUMN][MAX_ROW] =
{
{{10, IRQ_EINT0, S3C2410_GPF0, S3C2410_GPE11},       /* 0行0列 */
{11, IRQ_EINT0, S3C2410_GPF0, S3C2410_GPG6},
{12, IRQ_EINT0, S3C2410_GPF0, S3C2410_GPE13},
{16, IRQ_EINT0, S3C2410_GPF0, S3C2410_GPG2}},
{{7, IRQ_EINT2, S3C2410_GPF2, S3C2410_GPE11},       /* 1行0列 */
{8,    IRQ_EINT2, S3C2410_GPF2, S3C2410_GPG6},
{9,    IRQ_EINT2, S3C2410_GPF2, S3C2410_GPE13},
{15, IRQ_EINT2, S3C2410_GPF2, S3C2410_GPG2}},
{{4, IRQ_EINT11, S3C2410_GPG3, S3C2410_GPE11},    /* 2行0列 */
{5,    IRQ_EINT11, S3C2410_GPG3, S3C2410_GPG6},
{6,    IRQ_EINT11, S3C2410_GPG3, S3C2410_GPE13},
{14, IRQ_EINT11, S3C2410_GPG3, S3C2410_GPG2}},
{{1, IRQ_EINT19, S3C2410_GPG11, S3C2410_GPE11},    /* 3行0列 */
{2,    IRQ_EINT19, S3C2410_GPG11, S3C2410_GPG6},
{3,    IRQ_EINT19, S3C2410_GPG11, S3C2410_GPE13},
{13, IRQ_EINT19, S3C2410_GPG11, S3C2410_GPG2}},
};

//下面是与按键相关的端口的初始化函数。这些函数已经在简单的GPIO字符设备驱动程序里被使用过。此外，set_irq_type()函数用于设定中断线的类型，在本实例中通过该函数将4个中断线的类型配置为下降沿触发式。
static void init_gpio(void)
{
s3c2410_gpio_cfgpin(S3C2410_GPE11, S3C2410_GPE11_OUTP);    /* GPE11 */
s3c2410_gpio_setpin(S3C2410_GPE11, 0);
s3c2410_gpio_cfgpin(S3C2410_GPE13, S3C2410_GPE13_OUTP);    /* GPE13 */
s3c2410_gpio_setpin(S3C2410_GPE13, 0);
s3c2410_gpio_cfgpin(S3C2410_GPG2, S3C2410_GPG2_OUTP);    /* GPG2 */
s3c2410_gpio_setpin(S3C2410_GPG2, 0);
s3c2410_gpio_cfgpin(S3C2410_GPG6, S3C2410_GPG6_OUTP);    /* GPG6 */
s3c2410_gpio_setpin(S3C2410_GPG6, 0);
s3c2410_gpio_cfgpin(S3C2410_GPF0, S3C2410_GPF0_EINT0);    /* GPF0 */
s3c2410_gpio_cfgpin(S3C2410_GPF2, S3C2410_GPF2_EINT2);    /* GPF2 */
s3c2410_gpio_cfgpin(S3C2410_GPG3, S3C2410_GPG3_EINT11);    /* GPG3 */
s3c2410_gpio_cfgpin(S3C2410_GPG11, S3C2410_GPG11_EINT19);    /* GPG11 */
set_irq_type(IRQ_EINT0, IRQT_FALLING);
set_irq_type(IRQ_EINT2, IRQT_FALLING);
set_irq_type(IRQ_EINT11, IRQT_FALLING);
set_irq_type(IRQ_EINT19, IRQT_FALLING);
}
现在讨论按键驱动的主要接口，以下为驱动模块的入口和卸载函数。
/* 初始化并添加struct cdev结构到系统之中 */
static void button_setup_cdev(struct cdev *dev,
               int minor, struct file_operations *fops)
{
int err;
int devno = MKDEV(button_major,minor);
cdev_init(dev, fops); /* 初始化结构体struct cdev */
dev->owner = THIS_MODULE;
dev->ops = fops; /* 关联到设备的file_operations结构 */
err = cdev_add(dev, devno, 1); /* 将struct cdev结构添加到系统之中 */
if (err)
{
      printk(KERN_INFO"Error %d adding button %d\n",err, minor);
}
}
……
/* 驱动初始化 */
static int button_init(void)
{
int ret;
/* 将主设备号和次设备号定义到一个dev_t数据类型的结构体之中 */
dev_t dev = MKDEV(button_major, 0);
if (button_major)
{/* 静态注册一个设备，设备号先前指定好，并设定设备名，用cat /proc/devices来查看 */
      ret = register_chrdev_region(dev, 1, BUTTONS_DEVICE_NAME);
}
else
{ /*由系统动态分配主设备号 */
      ret = alloc_chrdev_region(&dev, 0, 1, BUTTONS_DEVICE_NAME);
      button_major = MAJOR(dev); /* 获得主设备号 */
}
if (ret < 0)
{
      printk(KERN_WARNING"Button:unable to get major %d\n",button_major);
      return ret;
}
/* 初始化和添加结构体struct cdev到系统之中 */
button_setup_cdev(&button_dev, 0, &button_fops);
printk("Button driver initialized.\n");
return 0;
}
/* 驱动卸载 */
static void __exit button_exit(void)
{
cdev_del(&button_dev); /* 删除结构体struct cdev */
/* 卸载设备驱动所占有的资源 */
unregister_chrdev_region(MKDEV(button_major, 0), 1);
printk("Button driver uninstalled\n");
}
module_init(button_init); /* 初始化设备驱动程序的入口 */
module_exit(button_exit); /* 卸载设备驱动程序的入口 */
MODULE_AUTHOR("David");
MODULE_LICENSE("Dual BSD/GPL");


static struct file_operations button_fops =
{
.owner = THIS_MODULE,
.ioctl = button_ioctl,
.open = button_open,
.read = button_read,
.release = button_release,
};


/* 打开文件, 申请中断 */
static int button_open(struct inode *inode,struct file *filp)
{
int ret = nonseekable_open(inode, filp);
if (ret < 0)
{
      return ret;
}
init_gpio(); /* 相关GPIO端口的初始化*/
request_irqs(); /* 申请4个中断 */
if (ret < 0)
{
      return ret;
}
init_keybuffer(); /* 初始化按键缓冲数据结构 */
return ret;
}

/* 关闭文件, 屏蔽中断 */
static int button_release(struct inode *inode,struct file *filp)
{
free_irqs(); /* 屏蔽中断 */
return 0;
}

//在open函数接口中，进行了GPIO端口的初始化、申请硬件中断以及按键缓冲的初始化等工作。在以前的章节中提过，中断端口是比较宝贵而且数量有限的资源。因此需要注意，最好要在第一次打开设备时申请（调用request_irq函数）中断端口，而不是在驱动模块加载的时候申请。如果已加载的设备驱动占用而在一定时间段内不使用某些中断资源，则这些资源不会被其他驱动所使用，只能白白浪费掉。而在打开设备的时候（调用open函数接口）申请中断，则不同的设备驱动可以共享这些宝贵的中断资源。

//以下为中断申请和释放的部分以及中断处理函数。

/* 中断处理函数,其中irq为中断号 */
static irqreturn_t button_irq(int irq, void *dev_id, struct pt_regs *regs)
{
unsigned char ucKey = 0;
disable_irqs(); /* 屏蔽中断 */
/* 延迟50毫秒, 屏蔽按键毛刺 */
udelay(50000);
ucKey = button_scan(irq); /* 扫描按键，获得进行操作的按键的ID */
if ((ucKey >= 1) && (ucKey <= 16))
{
      /* 如果缓冲区已满, 则不添加 */
      if (((key_buffer.head + 1) & (MAX_KEY_COUNT - 1)) != key_buffer.tail)
      {
         spin_lock_irq(&buffer_lock);
         key_buffer.jiffy[key_buffer.tail] = get_tick_count();
         key_buffer.tail ++;
         key_buffer.tail &= (MAX_KEY_COUNT -1);
         spin_unlock_irq(&buffer_lock);
      }
}
init_gpio(); /* 初始化GPIO端口，主要是为了恢复中断端口配置 */
enable_irqs(); /* 开启中断 */
return IRQ_HANDLED;/* 2.6内核返回值一般是这个宏 */
}

/* 申请4个中断 */
static int request_irqs(void)
{
int ret, i, j;
for (i = 0; i < MAX_COLUMN; i++)
{
      ret = request_irq(key_info_matrix[0].irq_no,
               button_irq, SA_INTERRUPT, BUTTONS_DEVICE_NAME, NULL);
      if (ret < 0)
      {
               for (j = 0; j < i; j++)
               {
                  free_irq(key_info_matrix[j][0].irq_no, NULL);
               }
               return -EFAULT;
      }
   }
   return 0;
}

/* 释放中断 */
static __inline void free_irqs(void)
{
int i;
for (i = 0; i < MAX_COLUMN; i++)
{
      free_irq(key_info_matrix[0].irq_no, NULL);
}
}

//中断处理函数在每次中断产生的时候会被调用，因此它的执行时间要尽可能得短。通常中断处理函数只是简单地唤醒等待资源的任务，而复杂且耗时的工作则让这个任务去完成。中断处理函数不能向用户空间发送数据或者接收数据，不能做任何可能发生睡眠的操作，而且不能调用schedule()函数。

//为了简单起见，而且考虑到按键操作的时间比较长，在本实例中的中断处理函数button_irq()里，通过调用睡眠函数来消除毛刺信号。读者可以根据以上介绍的对中断处理函数的要求改进该部分代码。

//按键扫描函数如下所示。首先根据中断号确定操作按键所在行的位置，然后采用逐列扫描法最终确定操作按键所在的位置。

/*
** 进入中断后, 扫描铵键码
** 返回: 按键码(1-16), 0xff表示错误
*/
static __inline unsigned char button_scan(int irq)
{
unsigned char key_id = 0xff;
unsigned char column = 0xff, row = 0xff;
s3c2410_gpio_cfgpin(S3C2410_GPF0, S3C2410_GPF0_INP); /* GPF0 */
s3c2410_gpio_cfgpin(S3C2410_GPF2, S3C2410_GPF2_INP); /* GPF2 */
s3c2410_gpio_cfgpin(S3C2410_GPG3, S3C2410_GPG3_INP); /* GPG3 */
s3c2410_gpio_cfgpin(S3C2410_GPG11, S3C2410_GPG11_INP); /* GPG11 */
switch (irq)
{ /* 根据irq值确定操作按键所在行的位置*/
      case IRQ_EINT0:
      {
            column = 0;
      }
      break;
      case IRQ_EINT2:
      {
            column = 1;
      }
      break;
      case IRQ_EINT11:
      {
            column = 2;
      }
      break;
      case IRQ_EINT19:
      {
            column = 3;
      }
      break;
}
if (column != 0xff)
{ /* 开始逐列扫描，扫描第0列 */
      s3c2410_gpio_setpin(S3C2410_GPE11, 0); /* 将KSCAN0置为低电平 */
      s3c2410_gpio_setpin(S3C2410_GPG6, 1);
      s3c2410_gpio_setpin(S3C2410_GPE13, 1);
      s3c2410_gpio_setpin(S3C2410_GPG2, 1);
   if(!s3c2410_gpio_getpin(key_info_matrix[column][0].irq_gpio_port))
      { /* 观察对应的中断线的输入端口值 */
            key_id = key_info_matrix[column][0].key_id;
            return key_id;
      }
      /* 扫描第1列*/
      s3c2410_gpio_setpin(S3C2410_GPE11, 1);
      s3c2410_gpio_setpin(S3C2410_GPG6, 0); /* 将KSCAN1置为低电平 */
      s3c2410_gpio_setpin(S3C2410_GPE13, 1);
      s3c2410_gpio_setpin(S3C2410_GPG2, 1);
      if(!s3c2410_gpio_getpin(key_info_matrix[column][1].irq_gpio_port))
      {
            key_id = key_info_matrix[column][1].key_id;
            return key_id;
      }
      /* 扫描第2列*/
      s3c2410_gpio_setpin(S3C2410_GPE11, 1);
      s3c2410_gpio_setpin(S3C2410_GPG6, 1);
      s3c2410_gpio_setpin(S3C2410_GPE13, 0); /* 将KSCAN2置为低电平 */
      s3c2410_gpio_setpin(S3C2410_GPG2, 1);
      if(!s3c2410_gpio_getpin(key_info_matrix[column][2].irq_gpio_port))
      {
            key_id = key_info_matrix[column][2].key_id;
            return key_id;
      }
      /* 扫描第3列*/
      s3c2410_gpio_setpin(S3C2410_GPE11, 1);
      s3c2410_gpio_setpin(S3C2410_GPG6, 1);
      s3c2410_gpio_setpin(S3C2410_GPE13, 1);
      s3c2410_gpio_setpin(S3C2410_GPG2, 0); /* 将KSCAN3置为低电平 */
      if(!s3c2410_gpio_getpin(key_info_matrix[column][3].irq_gpio_port))
      {
            key_id = key_info_matrix[column][3].key_id;
            return key_id;
      }
   }
   return key_id;
}

//以下是read函数接口的实现。首先在按键缓冲中删除已经过时的按键操作信息，接下来，从按键缓冲中读取一条信息（按键ID）并传递给用户层。

/* 从缓冲删除过时数据(5秒前的按键值) */
static void remove_timeoutkey(void)
{
unsigned long tick;
spin_lock_irq(&buffer_lock); /* 获得一个自旋锁 */
while(key_buffer.head != key_buffer.tail)
{
      tick = get_tick_count() - key_buffer.jiffy[key_buffer.head];
      if (tick < 5000) /* 5秒 */
      break;
      key_buffer.buf[key_buffer.head] = 0;
      key_buffer.jiffy[key_buffer.head] = 0;
      key_buffer.head ++;
      key_buffer.head &= (MAX_KEY_COUNT -1);
}
spin_unlock_irq(&buffer_lock); /* 释放自旋锁 */
}

/* 读键盘 */
static ssize_t button_read(struct file *filp,
                     char *buffer, size_t count, loff_t *f_pos)
{
   ssize_t ret = 0;
   remove_timeoutkey(); /* 删除过时的按键操作信息 */
   spin_lock_irq(&buffer_lock);
   while((key_buffer.head != key_buffer.tail) && (((size_t)ret) < count))
   {
         put_user((char)(key_buffer.buf[key_buffer.head]), &buffer[ret]);
         key_buffer.buf[key_buffer.head] = 0;
         key_buffer.jiffy[key_buffer.head] = 0;
         key_buffer.head ++;
         key_buffer.head &= (MAX_KEY_COUNT -1);
         ret ++;
   }
   spin_unlock_irq(&buffer_lock);
   return ret;
}

作者: 冬青 时间: 2017-2-27 15:10
http://bbs.csdn.net/topics/380264724

作者: 冬青 时间: 2017-2-27 15:17
http://blog.chinaunix.net/uid-20768928-id-5084287.html

LINUX GPIO独立按键和 GPIO矩阵键盘
作者: 冬青 时间: 2017-2-27 15:50
http://blog.csdn.net/wang__rongwei/article/details/54732245
作者: 冬青 时间: 2017-2-28 09:41
TI官方开发板AM3517EVM

我想移植一个8*5的GPIO矩阵键盘，在linux源码/drivers/input/目录下有很多种键盘驱动程序，但是
能用到自己项目上的似乎只有matrix-keypad键盘驱动，我在board-am3517evm.c中定义好了键盘资源，如下：

static const unsigned int matrix_keypad_cols[] = {128,129,130,131,132};
static const unsigned int matrix_keypad_rows[] = {120,121,122,123,124,125,126,127};
static uint32_t am3505_keymap[] __initdata =
{
//KEY(row, col, keycode)
KEY(0,0, KEY_F1), KEY(0,1, KEY_1), KEY(0,2, KEY_4), KEY(0,3, KEY_7), KEY(0,4,KEY_PROG1),
KEY(1,0, KEY_F2), KEY(1,1, KEY_2), KEY(1,2, KEY_5), KEY(1,3, KEY_8),KEY(1,4,KEY_PROG2),
KEY(2,0, KEY_F3), KEY(2,1, KEY_3), KEY(2,2, KEY_6), KEY(2,3, KEY_9),KEY(2,4,KEY_PROG3),
KEY(3,0, KEY_F4),KEY(3,1, KEY_0),KEY(3,2,KEY_DOT),KEY(3,3,KEY_HELP),KEY(3,4,KEY_PROG4),
KEY(4,0, KEY_F5), KEY(4,1, KEY_DELETE), KEY(4,2, KEY_INSERT), KEY(4,3, KEY_SETUP), KEY(4,4, KEY_B),
KEY(5,0, KEY_F6), KEY(5,1, KEY_HOMEPAGE), KEY(5,2, KEY_ESC), KEY(5,3, KEY_LEFT), KEY(5,4, KEY_W),
KEY(6,0, KEY_F7), KEY(6,1, KEY_END), KEY(6,2, KEY_UP), KEY(6,3, KEY_ENTER), KEY(6,4, KEY_DOWN),
KEY(7,0, KEY_F8), KEY(7,1, KEY_PAGEUP), KEY(7,2, KEY_PAGEDOWN), KEY(7,3, KEY_RIGHT), KEY(7,4, KEY_POWER),
};
static struct matrix_keymap_data am3505_keymap_data __initdata =
{
.keymap = am3505_keymap,
.keymap_size =ARRAY_SIZE(am3505_keymap),
};
static struct matrix_keypad_platform_data am3505_keypad_data __initdata =
{
.keymap_data = &am3505_keymap_data,
.col_gpios = matrix_keypad_cols,
.row_gpios = matrix_keypad_rows,
.num_col_gpios = ARRAY_SIZE(matrix_keypad_cols),
.num_row_gpios = ARRAY_SIZE(matrix_keypad_rows),
.col_scan_delay_us = 10,
.debounce_ms = 80,
// .wakeup = 1,
.active_low = 1,
  //  .no_autorepeat    = 1,
};
配置GPIO口
      OMAP3_MUX(SDMMC1_CLK, OMAP_MUX_MODE4 | OMAP_PIN_INPUT_PULLDOWN),
OMAP3_MUX(SDMMC1_CMD, OMAP_MUX_MODE4 | OMAP_PIN_INPUT_PULLDOWN),
OMAP3_MUX(SDMMC1_DAT0, OMAP_MUX_MODE4 | OMAP_PIN_INPUT_PULLDOWN),
OMAP3_MUX(SDMMC1_DAT1, OMAP_MUX_MODE4 | OMAP_PIN_INPUT_PULLDOWN),
      OMAP3_MUX(SDMMC1_DAT2, OMAP_MUX_MODE4 | OMAP_PIN_INPUT_PULLDOWN),
OMAP3_MUX(SDMMC1_DAT3, OMAP_MUX_MODE4 | OMAP_PIN_INPUT_PULLDOWN),
OMAP3_MUX(SDMMC1_DAT4, OMAP_MUX_MODE4 | OMAP_PIN_INPUT_PULLDOWN),
OMAP3_MUX(SDMMC1_DAT5, OMAP_MUX_MODE4 | OMAP_PIN_INPUT_PULLDOWN),

      OMAP3_MUX(SDMMC1_DAT6, OMAP_MUX_MODE4 | OMAP_PIN_OUTPUT),
OMAP3_MUX(SDMMC1_DAT7, OMAP_MUX_MODE4 | OMAP_PIN_OUTPUT),
      OMAP3_MUX(SDMMC2_CLK, OMAP_MUX_MODE4 | OMAP_PIN_OUTPUT),
OMAP3_MUX(SDMMC2_CMD, OMAP_MUX_MODE4 | OMAP_PIN_OUTPUT),
      OMAP3_MUX(SDMMC2_DAT0, OMAP_MUX_MODE4 | OMAP_PIN_OUTPUT),

加入到设备列表中
static struct platform_device *am3517_evm_devices[] __initdata = {
&am3517_evm_dss_device,
      &matrix_device_keypad,
};

1 请问以上的键盘代码移植是否有问题？
2 板卡启动后，行按键中断可以响应，在matrix-keypad.c文件函数matrix_keypad_interrupt中
打印调试信息printk();说明可以响应行中断，schedule_delayed_work(&keypad->work,msecs_to_jiffies(keypad->pdata->debounce_ms));中的keypad->pdata->debounce_ms值为负值，我在上面明明设置抖动时间为80；不知道是说明原因？
作者: 冬青 时间: 2017-2-28 09:52
键值从键盘到Linux内核传输过程分析

http://blog.csdn.net/kangear/article/details/42265927
作者: 冬青 时间: 2017-2-28 09:54
Linux键盘键值表

值描述
0x1 鼠标左键
0x2 鼠标右键
0x3 CANCEL 键
0x4 鼠标中键
0x8 BACKSPACE 键
0x9 TAB 键
0xC CLEAR 键
0xD ENTER 键
0x10 SHIFT 键
0x11 CTRL 键
0x12 MENU 键
0x13 PAUSE 键
0x14 CAPS LOCK 键
0x1B ESC 键
0x20 SPACEBAR 键
0x21 PAGE UP 键
0x22 PAGE DOWN 键
0x23 END 键
0x24 HOME 键
0x25 LEFT ARROW 键
0x26 UP ARROW 键
0x27 RIGHT ARROW 键
0x28 DOWN ARROW 键
0x29 SELECT 键
0x2A PRINT SCREEN 键
0x2B EXECUTE 键
0x2C SNAPSHOT 键
0x2D INSERT 键
0x2E DELETE 键
0x2F HELP 键
0x90 NUM LOCK 键
A 至 Z 键与 A – Z 字母的 ASCII 码相同：
值描述
65 A 键
66 B 键
67 C 键
68 D 键
69 E 键
70 F 键
71 G 键
72 H 键
73 I 键
74 J 键
75 K 键
76 L 键
77 M 键
78 N 键
79 O 键
80 P 键
81 Q 键
82 R 键
83 S 键
84 T 键
85 U 键
86 V 键
87 W 键
88 X 键
89 Y 键
90 Z 键
0 至 9 键与数字 0 – 9 的 ASCII 码相同：
值描述
48 0 键
49 1 键
50 2 键
51 3 键
52 4 键
53 5 键
54 6 键
55 7 键
56 8 键
57 9 键
下列常数代表数字键盘上的键：
值描述
0x60 0 键
0x61 1 键
0x62 2 键
0x63 3 键
0x64 4 键
0x65 5 键
0x66 6 键
0x67 7 键
0x68 8 键
0x69 9 键
0x6A MULTIPLICATION SIGN (*) 键
0x6B PLUS SIGN (+) 键
0x6C ENTER 键
0x6D MINUS SIGN (–) 键
0x6E DECIMAL POINT (.) 键
0x6F DIVISION SIGN (/) 键
下列常数代表功能键：
值描述
0x70 F1 键
0x71 F2 键
0x72 F3 键
0x73 F4 键
0x74 F5 键
0x75 F6 键
0x76 F7 键
0x77 F8 键
0x78 F9 键
0x79 F10 键
0x7A F11 键
0x7B F12 键
0x7C F13 键
0x7D F14 键
0x7E F15 键
0x7F F16 键
作者: 冬青 时间: 2017-2-28 10:01
include/linux/input.h

#ifndef _INPUT_H
#define _INPUT_H

/*
* Copyright (c) 1999-2002 Vojtech Pavlik
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*/

#ifdef __KERNEL__
#include <linux/time.h>
#include <linux/list.h>
#else
#include <sys/time.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <linux/types.h>
#endif

/*
* The event structure itself
*/

struct input_event {
struct timeval time;
__u16 type;
__u16 code;
__s32 value;
};

/*
* Protocol version.
*/

#define EV_VERSION 0x010001

/*
* IOCTLs (0x00 - 0x7f)
*/

struct input_id {
__u16 bustype;
__u16 vendor;
__u16 product;
__u16 version;
};

/**
* struct input_absinfo - used by EVIOCGABS/EVIOCSABS ioctls
* @value: latest reported value for the axis.
* @minimum: specifies minimum value for the axis.
* @maximum: specifies maximum value for the axis.
* @fuzz: specifies fuzz value that is used to filter noise from
* the event stream.
* @flat: values that are within this value will be discarded by
* joydev interface and reported as 0 instead.
* @resolution: specifies resolution for the values reported for
* the axis.
*
* Note that input core does not clamp reported values to the
* [minimum, maximum] limits, such task is left to userspace.
*
* Resolution for main axes (ABS_X, ABS_Y, ABS_Z) is reported in
* units per millimeter (units/mm), resolution for rotational axes
* (ABS_RX, ABS_RY, ABS_RZ) is reported in units per radian.
*/
struct input_absinfo {
__s32 value;
__s32 minimum;
__s32 maximum;
__s32 fuzz;
__s32 flat;
__s32 resolution;
};

/**
* struct input_keymap_entry - used by EVIOCGKEYCODE/EVIOCSKEYCODE ioctls
* @scancode: scancode represented in machine-endian form.
* @len: length of the scancode that resides in @scancode buffer.
* @index: index in the keymap, may be used instead of scancode
* @flags: allows to specify how kernel should handle the request. For
* example, setting INPUT_KEYMAP_BY_INDEX flag indicates that kernel
* should perform lookup in keymap by @index instead of @scancode
* @keycode: key code assigned to this scancode
*
* The structure is used to retrieve and modify keymap data. Users have
* option of performing lookup either by @scancode itself or by @index
* in keymap entry. EVIOCGKEYCODE will also return scancode or index
* (depending on which element was used to perform lookup).
*/
struct input_keymap_entry {
#define INPUT_KEYMAP_BY_INDEX (1 << 0)
__u8  flags;
__u8  len;
__u16 index;
__u32 keycode;
__u8  scancode[32];
};

#define EVIOCGVERSION _IOR('E', 0x01, int) /* get driver version */
#define EVIOCGID _IOR('E', 0x02, struct input_id) /* get device ID */
#define EVIOCGREP _IOR('E', 0x03, unsigned int[2]) /* get repeat settings */
#define EVIOCSREP _IOW('E', 0x03, unsigned int[2]) /* set repeat settings */

#define EVIOCGKEYCODE _IOR('E', 0x04, unsigned int[2])       /* get keycode */
#define EVIOCGKEYCODE_V2 _IOR('E', 0x04, struct input_keymap_entry)
#define EVIOCSKEYCODE _IOW('E', 0x04, unsigned int[2])       /* set keycode */
#define EVIOCSKEYCODE_V2 _IOW('E', 0x04, struct input_keymap_entry)

#define EVIOCGNAME(len) _IOC(_IOC_READ, 'E', 0x06, len) /* get device name */
#define EVIOCGPHYS(len) _IOC(_IOC_READ, 'E', 0x07, len) /* get physical location */
#define EVIOCGUNIQ(len) _IOC(_IOC_READ, 'E', 0x08, len) /* get unique identifier */
#define EVIOCGPROP(len) _IOC(_IOC_READ, 'E', 0x09, len) /* get device properties */

#define EVIOCGKEY(len) _IOC(_IOC_READ, 'E', 0x18, len) /* get global key state */
#define EVIOCGLED(len) _IOC(_IOC_READ, 'E', 0x19, len) /* get all LEDs */
#define EVIOCGSND(len) _IOC(_IOC_READ, 'E', 0x1a, len) /* get all sounds status */
#define EVIOCGSW(len) _IOC(_IOC_READ, 'E', 0x1b, len) /* get all switch states */

#define EVIOCGBIT(ev,len) _IOC(_IOC_READ, 'E', 0x20 + (ev), len) /* get event bits */
#define EVIOCGABS(abs) _IOR('E', 0x40 + (abs), struct input_absinfo) /* get abs value/limits */
#define EVIOCSABS(abs) _IOW('E', 0xc0 + (abs), struct input_absinfo) /* set abs value/limits */

#define EVIOCSFF _IOC(_IOC_WRITE, 'E', 0x80, sizeof(struct ff_effect)) /* send a force effect to a force feedback device */
#define EVIOCRMFF _IOW('E', 0x81, int) /* Erase a force effect */
#define EVIOCGEFFECTS _IOR('E', 0x84, int) /* Report number of effects playable at the same time */

#define EVIOCGRAB _IOW('E', 0x90, int) /* Grab/Release device */

/*
* Device properties and quirks
*/

#define INPUT_PROP_POINTER 0x00 /* needs a pointer */
#define INPUT_PROP_DIRECT 0x01 /* direct input devices */
#define INPUT_PROP_BUTTONPAD 0x02 /* has button(s) under pad */
#define INPUT_PROP_SEMI_MT 0x03 /* touch rectangle only */

#define INPUT_PROP_MAX 0x1f
#define INPUT_PROP_CNT (INPUT_PROP_MAX + 1)

/*
* Event types
*/

#define EV_SYN 0x00
#define EV_KEY 0x01
#define EV_REL 0x02
#define EV_ABS 0x03
#define EV_MSC 0x04
#define EV_SW 0x05
#define EV_LED 0x11
#define EV_SND 0x12
#define EV_REP 0x14
#define EV_FF 0x15
#define EV_PWR 0x16
#define EV_FF_STATUS 0x17
#define EV_MAX 0x1f
#define EV_CNT (EV_MAX+1)

/*
* Synchronization events.
*/

#define SYN_REPORT 0
#define SYN_CONFIG 1
#define SYN_MT_REPORT 2
#define SYN_DROPPED 3

/*
* Keys and buttons
*
* Most of the keys/buttons are modeled after USB HUT 1.12
* (see http://www.usb.org/developers/hidpage).
* Abbreviations in the comments:
* AC - Application Control
* AL - Application Launch Button
* SC - System Control
*/

#define KEY_RESERVED 0
#define KEY_ESC 1
#define KEY_1 2
#define KEY_2 3
#define KEY_3 4
#define KEY_4 5
#define KEY_5 6
#define KEY_6 7
#define KEY_7 8
#define KEY_8 9
#define KEY_9 10
#define KEY_0 11
#define KEY_MINUS 12
#define KEY_EQUAL 13
#define KEY_BACKSPACE 14
#define KEY_TAB 15
#define KEY_Q 16
#define KEY_W 17
#define KEY_E 18
#define KEY_R 19
#define KEY_T 20
#define KEY_Y 21
#define KEY_U 22
#define KEY_I 23
#define KEY_O 24
#define KEY_P 25
#define KEY_LEFTBRACE 26
#define KEY_RIGHTBRACE 27
#define KEY_ENTER 28
#define KEY_LEFTCTRL 29
#define KEY_A 30
#define KEY_S 31
#define KEY_D 32
#define KEY_F 33
#define KEY_G 34
#define KEY_H 35
#define KEY_J 36
#define KEY_K 37
#define KEY_L 38
#define KEY_SEMICOLON 39
#define KEY_APOSTROPHE 40
#define KEY_GRAVE 41
#define KEY_LEFTSHIFT 42
#define KEY_BACKSLASH 43
#define KEY_Z 44
#define KEY_X 45
#define KEY_C 46
#define KEY_V 47
#define KEY_B 48
#define KEY_N 49
#define KEY_M 50
#define KEY_COMMA 51
#define KEY_DOT 52
#define KEY_SLASH 53
#define KEY_RIGHTSHIFT 54
#define KEY_KPASTERISK 55
#define KEY_LEFTALT 56
#define KEY_SPACE 57
#define KEY_CAPSLOCK 58
#define KEY_F1 59
#define KEY_F2 60
#define KEY_F3 61
#define KEY_F4 62
#define KEY_F5 63
#define KEY_F6 64
#define KEY_F7 65
#define KEY_F8 66
#define KEY_F9 67
#define KEY_F10 68
#define KEY_NUMLOCK 69
#define KEY_SCROLLLOCK 70
#define KEY_KP7 71
#define KEY_KP8 72
#define KEY_KP9 73
#define KEY_KPMINUS 74
#define KEY_KP4 75
#define KEY_KP5 76
#define KEY_KP6 77
#define KEY_KPPLUS 78
#define KEY_KP1 79
#define KEY_KP2 80
#define KEY_KP3 81
#define KEY_KP0 82
#define KEY_KPDOT 83

#define KEY_ZENKAKUHANKAKU 85
#define KEY_102ND 86
#define KEY_F11 87
#define KEY_F12 88
#define KEY_RO 89
#define KEY_KATAKANA 90
#define KEY_HIRAGANA 91
#define KEY_HENKAN 92
#define KEY_KATAKANAHIRAGANA 93
#define KEY_MUHENKAN 94
#define KEY_KPJPCOMMA 95
#define KEY_KPENTER 96
#define KEY_RIGHTCTRL 97
#define KEY_KPSLASH 98
#define KEY_SYSRQ 99
#define KEY_RIGHTALT 100
#define KEY_LINEFEED 101
#define KEY_HOME 102
#define KEY_UP 103
#define KEY_PAGEUP 104
#define KEY_LEFT 105
#define KEY_RIGHT 106
#define KEY_END 107
#define KEY_DOWN 108
#define KEY_PAGEDOWN 109
#define KEY_INSERT 110
#define KEY_DELETE 111
#define KEY_MACRO 112
#define KEY_MUTE 113
#define KEY_VOLUMEDOWN 114
#define KEY_VOLUMEUP 115
#define KEY_POWER 116 /* SC System Power Down */
#define KEY_KPEQUAL 117
#define KEY_KPPLUSMINUS 118
#define KEY_PAUSE 119
#define KEY_SCALE 120 /* AL Compiz Scale (Expose) */

#define KEY_KPCOMMA 121
#define KEY_HANGEUL 122
#define KEY_HANGUEL KEY_HANGEUL
#define KEY_HANJA 123
#define KEY_YEN 124
#define KEY_LEFTMETA 125
#define KEY_RIGHTMETA 126
#define KEY_COMPOSE 127

#define KEY_STOP 128 /* AC Stop */
#define KEY_AGAIN 129
#define KEY_PROPS 130 /* AC Properties */
#define KEY_UNDO 131 /* AC Undo */
#define KEY_FRONT 132
#define KEY_COPY 133 /* AC Copy */
#define KEY_OPEN 134 /* AC Open */
#define KEY_PASTE 135 /* AC Paste */
#define KEY_FIND 136 /* AC Search */
#define KEY_CUT 137 /* AC Cut */
#define KEY_HELP 138 /* AL Integrated Help Center */
#define KEY_MENU 139 /* Menu (show menu) */
#define KEY_CALC 140 /* AL Calculator */
#define KEY_SETUP 141
#define KEY_SLEEP 142 /* SC System Sleep */
#define KEY_WAKEUP 143 /* System Wake Up */
#define KEY_FILE 144 /* AL Local Machine Browser */
#define KEY_SENDFILE 145
#define KEY_DELETEFILE 146
#define KEY_XFER 147
#define KEY_PROG1 148
#define KEY_PROG2 149
#define KEY_WWW 150 /* AL Internet Browser */
#define KEY_MSDOS 151
#define KEY_COFFEE 152 /* AL Terminal Lock/Screensaver */
#define KEY_SCREENLOCK KEY_COFFEE
#define KEY_DIRECTION 153
#define KEY_CYCLEWINDOWS 154
#define KEY_MAIL 155
#define KEY_BOOKMARKS 156 /* AC Bookmarks */
#define KEY_COMPUTER 157
#define KEY_BACK 158 /* AC Back */
#define KEY_FORWARD 159 /* AC Forward */
#define KEY_CLOSECD 160
#define KEY_EJECTCD 161
#define KEY_EJECTCLOSECD 162
#define KEY_NEXTSONG 163
#define KEY_PLAYPAUSE 164
#define KEY_PREVIOUSSONG 165
#define KEY_STOPCD 166
#define KEY_RECORD 167
#define KEY_REWIND 168
#define KEY_PHONE 169 /* Media Select Telephone */
#define KEY_ISO 170
#define KEY_CONFIG 171 /* AL Consumer Control Configuration */
#define KEY_HOMEPAGE 172 /* AC Home */
#define KEY_REFRESH 173 /* AC Refresh */
#define KEY_EXIT 174 /* AC Exit */
#define KEY_MOVE 175
#define KEY_EDIT 176
#define KEY_SCROLLUP 177
#define KEY_SCROLLDOWN 178
#define KEY_KPLEFTPAREN 179
#define KEY_KPRIGHTPAREN 180
#define KEY_NEW 181 /* AC New */
#define KEY_REDO 182 /* AC Redo/Repeat */

#define KEY_F13 183
#define KEY_F14 184
#define KEY_F15 185
#define KEY_F16 186
#define KEY_F17 187
#define KEY_F18 188
#define KEY_F19 189
#define KEY_F20 190
#define KEY_F21 191
#define KEY_F22 192
#define KEY_F23 193
#define KEY_F24 194

#define KEY_PLAYCD 200
#define KEY_PAUSECD 201
#define KEY_PROG3 202
#define KEY_PROG4 203
#define KEY_DASHBOARD 204 /* AL Dashboard */
#define KEY_SUSPEND 205
#define KEY_CLOSE 206 /* AC Close */
#define KEY_PLAY 207
#define KEY_FASTFORWARD 208
#define KEY_BASSBOOST 209
#define KEY_PRINT 210 /* AC Print */
#define KEY_HP 211
#define KEY_CAMERA 212
#define KEY_SOUND 213
#define KEY_QUESTION 214
#define KEY_EMAIL 215
#define KEY_CHAT 216
#define KEY_SEARCH 217
#define KEY_CONNECT 218
#define KEY_FINANCE 219 /* AL Checkbook/Finance */
#define KEY_SPORT 220
#define KEY_SHOP 221
#define KEY_ALTERASE 222
#define KEY_CANCEL 223 /* AC Cancel */
#define KEY_BRIGHTNESSDOWN 224
#define KEY_BRIGHTNESSUP 225
#define KEY_MEDIA 226

#define KEY_SWITCHVIDEOMODE 227 /* Cycle between available video
   outputs (Monitor/LCD/TV-out/etc) */
#define KEY_KBDILLUMTOGGLE 228
#define KEY_KBDILLUMDOWN 229
#define KEY_KBDILLUMUP 230

#define KEY_SEND 231 /* AC Send */
#define KEY_REPLY 232 /* AC Reply */
#define KEY_FORWARDMAIL 233 /* AC Forward Msg */
#define KEY_SAVE 234 /* AC Save */
#define KEY_DOCUMENTS 235

#define KEY_BATTERY 236

#define KEY_BLUETOOTH 237
#define KEY_WLAN 238
#define KEY_UWB 239

#define KEY_UNKNOWN 240

#define KEY_VIDEO_NEXT 241 /* drive next video source */
#define KEY_VIDEO_PREV 242 /* drive previous video source */
#define KEY_BRIGHTNESS_CYCLE 243 /* brightness up, after max is min */
#define KEY_BRIGHTNESS_ZERO 244 /* brightness off, use ambient */
#define KEY_DISPLAY_OFF 245 /* display device to off state */

#define KEY_WIMAX 246
#define KEY_RFKILL 247 /* Key that controls all radios */

#define KEY_MICMUTE 248 /* Mute / unmute the microphone */

/* Code 255 is reserved for special needs of AT keyboard driver */

#define BTN_MISC 0x100
#define BTN_0 0x100
#define BTN_1 0x101
#define BTN_2 0x102
#define BTN_3 0x103
#define BTN_4 0x104
#define BTN_5 0x105
#define BTN_6 0x106
#define BTN_7 0x107
#define BTN_8 0x108
#define BTN_9 0x109

#define BTN_MOUSE 0x110
#define BTN_LEFT 0x110
#define BTN_RIGHT 0x111
#define BTN_MIDDLE 0x112
#define BTN_SIDE 0x113
#define BTN_EXTRA 0x114
#define BTN_FORWARD 0x115
#define BTN_BACK 0x116
#define BTN_TASK 0x117

#define BTN_JOYSTICK 0x120
#define BTN_TRIGGER 0x120
#define BTN_THUMB 0x121
#define BTN_THUMB2 0x122
#define BTN_TOP 0x123
#define BTN_TOP2 0x124
#define BTN_PINKIE 0x125
#define BTN_BASE 0x126
#define BTN_BASE2 0x127
#define BTN_BASE3 0x128
#define BTN_BASE4 0x129
#define BTN_BASE5 0x12a
#define BTN_BASE6 0x12b
#define BTN_DEAD 0x12f

#define BTN_GAMEPAD 0x130
#define BTN_A 0x130
#define BTN_B 0x131
#define BTN_C 0x132
#define BTN_X 0x133
#define BTN_Y 0x134
#define BTN_Z 0x135
#define BTN_TL 0x136
#define BTN_TR 0x137
#define BTN_TL2 0x138
#define BTN_TR2 0x139
#define BTN_SELECT 0x13a
#define BTN_START 0x13b
#define BTN_MODE 0x13c
#define BTN_THUMBL 0x13d
#define BTN_THUMBR 0x13e

#define BTN_DIGI 0x140
#define BTN_TOOL_PEN 0x140
#define BTN_TOOL_RUBBER 0x141
#define BTN_TOOL_BRUSH 0x142
#define BTN_TOOL_PENCIL 0x143
#define BTN_TOOL_AIRBRUSH 0x144
#define BTN_TOOL_FINGER 0x145
#define BTN_TOOL_MOUSE 0x146
#define BTN_TOOL_LENS 0x147
#define BTN_TOOL_QUINTTAP 0x148 /* Five fingers on trackpad */
#define BTN_TOUCH 0x14a
#define BTN_STYLUS 0x14b
#define BTN_STYLUS2 0x14c
#define BTN_TOOL_DOUBLETAP 0x14d
#define BTN_TOOL_TRIPLETAP 0x14e
#define BTN_TOOL_QUADTAP 0x14f /* Four fingers on trackpad */

#define BTN_WHEEL 0x150
#define BTN_GEAR_DOWN 0x150
#define BTN_GEAR_UP 0x151

#define KEY_OK 0x160
#define KEY_SELECT 0x161
#define KEY_GOTO 0x162
#define KEY_CLEAR 0x163
#define KEY_POWER2 0x164
#define KEY_OPTION 0x165
#define KEY_INFO 0x166 /* AL OEM Features/Tips/Tutorial */
#define KEY_TIME 0x167
#define KEY_VENDOR 0x168
#define KEY_ARCHIVE 0x169
#define KEY_PROGRAM 0x16a /* Media Select Program Guide */
#define KEY_CHANNEL 0x16b
#define KEY_FAVORITES 0x16c
#define KEY_EPG 0x16d
#define KEY_PVR 0x16e /* Media Select Home */
#define KEY_MHP 0x16f
#define KEY_LANGUAGE 0x170
#define KEY_TITLE 0x171
#define KEY_SUBTITLE 0x172
#define KEY_ANGLE 0x173
#define KEY_ZOOM 0x174
#define KEY_MODE 0x175
#define KEY_KEYBOARD 0x176
#define KEY_SCREEN 0x177
#define KEY_PC 0x178 /* Media Select Computer */
#define KEY_TV 0x179 /* Media Select TV */
#define KEY_TV2 0x17a /* Media Select Cable */
#define KEY_VCR 0x17b /* Media Select VCR */
#define KEY_VCR2 0x17c /* VCR Plus */
#define KEY_SAT 0x17d /* Media Select Satellite */
#define KEY_SAT2 0x17e
#define KEY_CD 0x17f /* Media Select CD */
#define KEY_TAPE 0x180 /* Media Select Tape */
#define KEY_RADIO 0x181
#define KEY_TUNER 0x182 /* Media Select Tuner */
#define KEY_PLAYER 0x183
#define KEY_TEXT 0x184
#define KEY_DVD 0x185 /* Media Select DVD */
#define KEY_AUX 0x186
#define KEY_MP3 0x187
#define KEY_AUDIO 0x188 /* AL Audio Browser */
#define KEY_VIDEO 0x189 /* AL Movie Browser */
#define KEY_DIRECTORY 0x18a
#define KEY_LIST 0x18b
#define KEY_MEMO 0x18c /* Media Select Messages */
#define KEY_CALENDAR 0x18d
#define KEY_RED 0x18e
#define KEY_GREEN 0x18f
#define KEY_YELLOW 0x190
#define KEY_BLUE 0x191
#define KEY_CHANNELUP 0x192 /* Channel Increment */
#define KEY_CHANNELDOWN 0x193 /* Channel Decrement */
#define KEY_FIRST 0x194
#define KEY_LAST 0x195 /* Recall Last */
#define KEY_AB 0x196
#define KEY_NEXT 0x197
#define KEY_RESTART 0x198
#define KEY_SLOW 0x199
#define KEY_SHUFFLE 0x19a
#define KEY_BREAK 0x19b
#define KEY_PREVIOUS 0x19c
#define KEY_DIGITS 0x19d
#define KEY_TEEN 0x19e
#define KEY_TWEN 0x19f
#define KEY_VIDEOPHONE 0x1a0 /* Media Select Video Phone */
#define KEY_GAMES 0x1a1 /* Media Select Games */
#define KEY_ZOOMIN 0x1a2 /* AC Zoom In */
#define KEY_ZOOMOUT 0x1a3 /* AC Zoom Out */
#define KEY_ZOOMRESET 0x1a4 /* AC Zoom */
#define KEY_WORDPROCESSOR 0x1a5 /* AL Word Processor */
#define KEY_EDITOR 0x1a6 /* AL Text Editor */
#define KEY_SPREADSHEET 0x1a7 /* AL Spreadsheet */
#define KEY_GRAPHICSEDITOR 0x1a8 /* AL Graphics Editor */
#define KEY_PRESENTATION 0x1a9 /* AL Presentation App */
#define KEY_DATABASE 0x1aa /* AL Database App */
#define KEY_NEWS 0x1ab /* AL Newsreader */
#define KEY_VOICEMAIL 0x1ac /* AL Voicemail */
#define KEY_ADDRESSBOOK 0x1ad /* AL Contacts/Address Book */
#define KEY_MESSENGER 0x1ae /* AL Instant Messaging */
#define KEY_DISPLAYTOGGLE 0x1af /* Turn display (LCD) on and off */
#define KEY_SPELLCHECK 0x1b0 /* AL Spell Check */
#define KEY_LOGOFF 0x1b1 /* AL Logoff */

#define KEY_DOLLAR 0x1b2
#define KEY_EURO 0x1b3

#define KEY_FRAMEBACK 0x1b4 /* Consumer - transport controls */
#define KEY_FRAMEFORWARD 0x1b5
#define KEY_CONTEXT_MENU 0x1b6 /* GenDesc - system context menu */
#define KEY_MEDIA_REPEAT 0x1b7 /* Consumer - transport control */
#define KEY_10CHANNELSUP 0x1b8 /* 10 channels up (10+) */
#define KEY_10CHANNELSDOWN 0x1b9 /* 10 channels down (10-) */
#define KEY_IMAGES 0x1ba /* AL Image Browser */

#define KEY_DEL_EOL 0x1c0
#define KEY_DEL_EOS 0x1c1
#define KEY_INS_LINE 0x1c2
#define KEY_DEL_LINE 0x1c3

#define KEY_FN 0x1d0
#define KEY_FN_ESC 0x1d1
#define KEY_FN_F1 0x1d2
#define KEY_FN_F2 0x1d3
#define KEY_FN_F3 0x1d4
#define KEY_FN_F4 0x1d5
#define KEY_FN_F5 0x1d6
#define KEY_FN_F6 0x1d7
#define KEY_FN_F7 0x1d8
#define KEY_FN_F8 0x1d9
#define KEY_FN_F9 0x1da
#define KEY_FN_F10 0x1db
#define KEY_FN_F11 0x1dc
#define KEY_FN_F12 0x1dd
#define KEY_FN_1 0x1de
#define KEY_FN_2 0x1df
#define KEY_FN_D 0x1e0
#define KEY_FN_E 0x1e1
#define KEY_FN_F 0x1e2
#define KEY_FN_S 0x1e3
#define KEY_FN_B 0x1e4

#define KEY_BRL_DOT1 0x1f1
#define KEY_BRL_DOT2 0x1f2
#define KEY_BRL_DOT3 0x1f3
#define KEY_BRL_DOT4 0x1f4
#define KEY_BRL_DOT5 0x1f5
#define KEY_BRL_DOT6 0x1f6
#define KEY_BRL_DOT7 0x1f7
#define KEY_BRL_DOT8 0x1f8
#define KEY_BRL_DOT9 0x1f9
#define KEY_BRL_DOT10 0x1fa

#define KEY_NUMERIC_0 0x200 /* used by phones, remote controls, */
#define KEY_NUMERIC_1 0x201 /* and other keypads */
#define KEY_NUMERIC_2 0x202
#define KEY_NUMERIC_3 0x203
#define KEY_NUMERIC_4 0x204
#define KEY_NUMERIC_5 0x205
#define KEY_NUMERIC_6 0x206
#define KEY_NUMERIC_7 0x207
#define KEY_NUMERIC_8 0x208
#define KEY_NUMERIC_9 0x209
#define KEY_NUMERIC_STAR 0x20a
#define KEY_NUMERIC_POUND 0x20b

#define KEY_CAMERA_FOCUS 0x210
#define KEY_WPS_BUTTON 0x211 /* WiFi Protected Setup key */

#define KEY_TOUCHPAD_TOGGLE 0x212 /* Request switch touchpad on or off */
#define KEY_TOUCHPAD_ON 0x213
#define KEY_TOUCHPAD_OFF 0x214

#define KEY_CAMERA_ZOOMIN 0x215
#define KEY_CAMERA_ZOOMOUT 0x216
#define KEY_CAMERA_UP 0x217
#define KEY_CAMERA_DOWN 0x218
#define KEY_CAMERA_LEFT 0x219
#define KEY_CAMERA_RIGHT 0x21a

#define BTN_TRIGGER_HAPPY 0x2c0
#define BTN_TRIGGER_HAPPY1 0x2c0
#define BTN_TRIGGER_HAPPY2 0x2c1
#define BTN_TRIGGER_HAPPY3 0x2c2
#define BTN_TRIGGER_HAPPY4 0x2c3
#define BTN_TRIGGER_HAPPY5 0x2c4
#define BTN_TRIGGER_HAPPY6 0x2c5
#define BTN_TRIGGER_HAPPY7 0x2c6
#define BTN_TRIGGER_HAPPY8 0x2c7
#define BTN_TRIGGER_HAPPY9 0x2c8
#define BTN_TRIGGER_HAPPY10 0x2c9
#define BTN_TRIGGER_HAPPY11 0x2ca
#define BTN_TRIGGER_HAPPY12 0x2cb
#define BTN_TRIGGER_HAPPY13 0x2cc
#define BTN_TRIGGER_HAPPY14 0x2cd
#define BTN_TRIGGER_HAPPY15 0x2ce
#define BTN_TRIGGER_HAPPY16 0x2cf
#define BTN_TRIGGER_HAPPY17 0x2d0
#define BTN_TRIGGER_HAPPY18 0x2d1
#define BTN_TRIGGER_HAPPY19 0x2d2
#define BTN_TRIGGER_HAPPY20 0x2d3
#define BTN_TRIGGER_HAPPY21 0x2d4
#define BTN_TRIGGER_HAPPY22 0x2d5
#define BTN_TRIGGER_HAPPY23 0x2d6
#define BTN_TRIGGER_HAPPY24 0x2d7
#define BTN_TRIGGER_HAPPY25 0x2d8
#define BTN_TRIGGER_HAPPY26 0x2d9
#define BTN_TRIGGER_HAPPY27 0x2da
#define BTN_TRIGGER_HAPPY28 0x2db
#define BTN_TRIGGER_HAPPY29 0x2dc
#define BTN_TRIGGER_HAPPY30 0x2dd
#define BTN_TRIGGER_HAPPY31 0x2de
#define BTN_TRIGGER_HAPPY32 0x2df
#define BTN_TRIGGER_HAPPY33 0x2e0
#define BTN_TRIGGER_HAPPY34 0x2e1
#define BTN_TRIGGER_HAPPY35 0x2e2
#define BTN_TRIGGER_HAPPY36 0x2e3
#define BTN_TRIGGER_HAPPY37 0x2e4
#define BTN_TRIGGER_HAPPY38 0x2e5
#define BTN_TRIGGER_HAPPY39 0x2e6
#define BTN_TRIGGER_HAPPY40 0x2e7

/* We avoid low common keys in module aliases so they don't get huge. */
#define KEY_MIN_INTERESTING KEY_MUTE
#define KEY_MAX 0x2ff
#define KEY_CNT (KEY_MAX+1)

/*
* Relative axes
*/

#define REL_X 0x00
#define REL_Y 0x01
#define REL_Z 0x02
#define REL_RX 0x03
#define REL_RY 0x04
#define REL_RZ 0x05
#define REL_HWHEEL 0x06
#define REL_DIAL 0x07
#define REL_WHEEL 0x08
#define REL_MISC 0x09
#define REL_MAX 0x0f
#define REL_CNT (REL_MAX+1)

/*
* Absolute axes
*/

#define ABS_X 0x00
#define ABS_Y 0x01
#define ABS_Z 0x02
#define ABS_RX 0x03
#define ABS_RY 0x04
#define ABS_RZ 0x05
#define ABS_THROTTLE 0x06
#define ABS_RUDDER 0x07
#define ABS_WHEEL 0x08
#define ABS_GAS 0x09
#define ABS_BRAKE 0x0a
#define ABS_HAT0X 0x10
#define ABS_HAT0Y 0x11
#define ABS_HAT1X 0x12
#define ABS_HAT1Y 0x13
#define ABS_HAT2X 0x14
#define ABS_HAT2Y 0x15
#define ABS_HAT3X 0x16
#define ABS_HAT3Y 0x17
#define ABS_PRESSURE 0x18
#define ABS_DISTANCE 0x19
#define ABS_TILT_X 0x1a
#define ABS_TILT_Y 0x1b
#define ABS_TOOL_WIDTH 0x1c

#define ABS_VOLUME 0x20

#define ABS_MISC 0x28

#define ABS_MT_SLOT 0x2f /* MT slot being modified */
#define ABS_MT_TOUCH_MAJOR 0x30 /* Major axis of touching ellipse */
#define ABS_MT_TOUCH_MINOR 0x31 /* Minor axis (omit if circular) */
#define ABS_MT_WIDTH_MAJOR 0x32 /* Major axis of approaching ellipse */
#define ABS_MT_WIDTH_MINOR 0x33 /* Minor axis (omit if circular) */
#define ABS_MT_ORIENTATION 0x34 /* Ellipse orientation */
#define ABS_MT_POSITION_X 0x35 /* Center X ellipse position */
#define ABS_MT_POSITION_Y 0x36 /* Center Y ellipse position */
#define ABS_MT_TOOL_TYPE 0x37 /* Type of touching device */
#define ABS_MT_BLOB_ID 0x38 /* Group a set of packets as a blob */
#define ABS_MT_TRACKING_ID 0x39 /* Unique ID of initiated contact */
#define ABS_MT_PRESSURE 0x3a /* Pressure on contact area */
#define ABS_MT_DISTANCE 0x3b /* Contact hover distance */

#ifdef __KERNEL__
/* Implementation details, userspace should not care about these */
#define ABS_MT_FIRST ABS_MT_TOUCH_MAJOR
#define ABS_MT_LAST ABS_MT_DISTANCE
#endif

#define ABS_MAX 0x3f
#define ABS_CNT (ABS_MAX+1)

/*
* Switch events
*/

#define SW_LID 0x00  /* set = lid shut */
#define SW_TABLET_MODE 0x01  /* set = tablet mode */
#define SW_HEADPHONE_INSERT 0x02  /* set = inserted */
#define SW_RFKILL_ALL 0x03  /* rfkill master switch, type "any"
   set = radio enabled */
#define SW_RADIO SW_RFKILL_ALL /* deprecated */
#define SW_MICROPHONE_INSERT 0x04  /* set = inserted */
#define SW_DOCK 0x05  /* set = plugged into dock */
#define SW_LINEOUT_INSERT 0x06  /* set = inserted */
#define SW_JACK_PHYSICAL_INSERT 0x07  /* set = mechanical switch set */
#define SW_VIDEOOUT_INSERT 0x08  /* set = inserted */
#define SW_CAMERA_LENS_COVER 0x09  /* set = lens covered */
#define SW_KEYPAD_SLIDE 0x0a  /* set = keypad slide out */
#define SW_FRONT_PROXIMITY 0x0b  /* set = front proximity sensor active */
#define SW_ROTATE_LOCK 0x0c  /* set = rotate locked/disabled */
#define SW_LINEIN_INSERT 0x0d  /* set = inserted */
#define SW_MAX 0x0f
#define SW_CNT (SW_MAX+1)

/*
* Misc events
*/

#define MSC_SERIAL 0x00
#define MSC_PULSELED 0x01
#define MSC_GESTURE 0x02
#define MSC_RAW 0x03
#define MSC_SCAN 0x04
#define MSC_MAX 0x07
#define MSC_CNT (MSC_MAX+1)

/*
* LEDs
*/

#define LED_NUML 0x00
#define LED_CAPSL 0x01
#define LED_SCROLLL 0x02
#define LED_COMPOSE 0x03
#define LED_KANA 0x04
#define LED_SLEEP 0x05
#define LED_SUSPEND 0x06
#define LED_MUTE 0x07
#define LED_MISC 0x08
#define LED_MAIL 0x09
#define LED_CHARGING 0x0a
#define LED_MAX 0x0f
#define LED_CNT (LED_MAX+1)

/*
* Autorepeat values
*/

#define REP_DELAY 0x00
#define REP_PERIOD 0x01
#define REP_MAX 0x01
#define REP_CNT (REP_MAX+1)

/*
* Sounds
*/

#define SND_CLICK 0x00
#define SND_BELL 0x01
#define SND_TONE 0x02
#define SND_MAX 0x07
#define SND_CNT (SND_MAX+1)

/*
* IDs.
*/

#define ID_BUS 0
#define ID_VENDOR 1
#define ID_PRODUCT 2
#define ID_VERSION 3

#define BUS_PCI 0x01
#define BUS_ISAPNP 0x02
#define BUS_USB 0x03
#define BUS_HIL 0x04
#define BUS_BLUETOOTH 0x05
#define BUS_VIRTUAL 0x06

#define BUS_ISA 0x10
#define BUS_I8042 0x11
#define BUS_XTKBD 0x12
#define BUS_RS232 0x13
#define BUS_GAMEPORT 0x14
#define BUS_PARPORT 0x15
#define BUS_AMIGA 0x16
#define BUS_ADB 0x17
#define BUS_I2C 0x18
#define BUS_HOST 0x19
#define BUS_GSC 0x1A
#define BUS_ATARI 0x1B
#define BUS_SPI 0x1C

/*
* MT_TOOL types
*/
#define MT_TOOL_FINGER 0
#define MT_TOOL_PEN 1
#define MT_TOOL_MAX 1

/*
* Values describing the status of a force-feedback effect
*/
#define FF_STATUS_STOPPED 0x00
#define FF_STATUS_PLAYING 0x01
#define FF_STATUS_MAX 0x01

/*
* Structures used in ioctls to upload effects to a device
* They are pieces of a bigger structure (called ff_effect)
*/

/*
* All duration values are expressed in ms. Values above 32767 ms (0x7fff)
* should not be used and have unspecified results.
*/

/**
* struct ff_replay - defines scheduling of the force-feedback effect
* @length: duration of the effect
* @delay: delay before effect should start playing
*/
struct ff_replay {
__u16 length;
__u16 delay;
};

/**
* struct ff_trigger - defines what triggers the force-feedback effect
* @button: number of the button triggering the effect
* @interval: controls how soon the effect can be re-triggered
*/
struct ff_trigger {
__u16 button;
__u16 interval;
};

/**
* struct ff_envelope - generic force-feedback effect envelope
* @attack_length: duration of the attack (ms)
* @attack_level: level at the beginning of the attack
* @fade_length: duration of fade (ms)
* @fade_level: level at the end of fade
*
* The @attack_level and @fade_level are absolute values; when applying
* envelope force-feedback core will convert to positive/negative
* value based on polarity of the default level of the effect.
* Valid range for the attack and fade levels is 0x0000 - 0x7fff
*/
struct ff_envelope {
__u16 attack_length;
__u16 attack_level;
__u16 fade_length;
__u16 fade_level;
};

/**
* struct ff_constant_effect - defines parameters of a constant force-feedback effect
* @level: strength of the effect; may be negative
* @envelope: envelope data
*/
struct ff_constant_effect {
__s16 level;
struct ff_envelope envelope;
};

/**
* struct ff_ramp_effect - defines parameters of a ramp force-feedback effect
* @start_level: beginning strength of the effect; may be negative
* @end_level: final strength of the effect; may be negative
* @envelope: envelope data
*/
struct ff_ramp_effect {
__s16 start_level;
__s16 end_level;
struct ff_envelope envelope;
};

/**
* struct ff_condition_effect - defines a spring or friction force-feedback effect
* @right_saturation: maximum level when joystick moved all way to the right
* @left_saturation: same for the left side
* @right_coeff: controls how fast the force grows when the joystick moves
* to the right
* @left_coeff: same for the left side
* @deadband: size of the dead zone, where no force is produced
* @center: position of the dead zone
*/
struct ff_condition_effect {
__u16 right_saturation;
__u16 left_saturation;

__s16 right_coeff;
__s16 left_coeff;

__u16 deadband;
__s16 center;
};

/**
* struct ff_periodic_effect - defines parameters of a periodic force-feedback effect
* @waveform: kind of the effect (wave)
* @period: period of the wave (ms)
* @magnitude: peak value
* @offset: mean value of the wave (roughly)
* @phase: 'horizontal' shift
* @envelope: envelope data
* @custom_len: number of samples (FF_CUSTOM only)
* @custom_data: buffer of samples (FF_CUSTOM only)
*
* Known waveforms - FF_SQUARE, FF_TRIANGLE, FF_SINE, FF_SAW_UP,
* FF_SAW_DOWN, FF_CUSTOM. The exact syntax FF_CUSTOM is undefined
* for the time being as no driver supports it yet.
*
* Note: the data pointed by custom_data is copied by the driver.
* You can therefore dispose of the memory after the upload/update.
*/
struct ff_periodic_effect {
__u16 waveform;
__u16 period;
__s16 magnitude;
__s16 offset;
__u16 phase;

struct ff_envelope envelope;

__u32 custom_len;
__s16 __user *custom_data;
};

/**
* struct ff_rumble_effect - defines parameters of a periodic force-feedback effect
* @strong_magnitude: magnitude of the heavy motor
* @weak_magnitude: magnitude of the light one
*
* Some rumble pads have two motors of different weight. Strong_magnitude
* represents the magnitude of the vibration generated by the heavy one.
*/
struct ff_rumble_effect {
__u16 strong_magnitude;
__u16 weak_magnitude;
};

/**
* struct ff_effect - defines force feedback effect
* @type: type of the effect (FF_CONSTANT, FF_PERIODIC, FF_RAMP, FF_SPRING,
* FF_FRICTION, FF_DAMPER, FF_RUMBLE, FF_INERTIA, or FF_CUSTOM)
* @id: an unique id assigned to an effect
* @direction: direction of the effect
* @trigger: trigger conditions (struct ff_trigger)
* @replay: scheduling of the effect (struct ff_replay)
* @u: effect-specific structure (one of ff_constant_effect, ff_ramp_effect,
* ff_periodic_effect, ff_condition_effect, ff_rumble_effect) further
* defining effect parameters
*
* This structure is sent through ioctl from the application to the driver.
* To create a new effect application should set its @id to -1; the kernel
* will return assigned @id which can later be used to update or delete
* this effect.
*
* Direction of the effect is encoded as follows:
* 0 deg -> 0x0000 (down)
* 90 deg -> 0x4000 (left)
* 180 deg -> 0x8000 (up)
* 270 deg -> 0xC000 (right)
*/
struct ff_effect {
__u16 type;
__s16 id;
__u16 direction;
struct ff_trigger trigger;
struct ff_replay replay;

union {
struct ff_constant_effect constant;
struct ff_ramp_effect ramp;
struct ff_periodic_effect periodic;
struct ff_condition_effect condition[2]; /* One for each axis */
struct ff_rumble_effect rumble;
} u;
};

/*
* Force feedback effect types
*/

#define FF_RUMBLE 0x50
#define FF_PERIODIC 0x51
#define FF_CONSTANT 0x52
#define FF_SPRING 0x53
#define FF_FRICTION 0x54
#define FF_DAMPER 0x55
#define FF_INERTIA 0x56
#define FF_RAMP 0x57

#define FF_EFFECT_MIN FF_RUMBLE
#define FF_EFFECT_MAX FF_RAMP

/*
* Force feedback periodic effect types
*/

#define FF_SQUARE 0x58
#define FF_TRIANGLE 0x59
#define FF_SINE 0x5a
#define FF_SAW_UP 0x5b
#define FF_SAW_DOWN 0x5c
#define FF_CUSTOM 0x5d

#define FF_WAVEFORM_MIN FF_SQUARE
#define FF_WAVEFORM_MAX FF_CUSTOM

/*
* Set ff device properties
*/

#define FF_GAIN 0x60
#define FF_AUTOCENTER 0x61

#define FF_MAX 0x7f
#define FF_CNT (FF_MAX+1)

#ifdef __KERNEL__

/*
* In-kernel definitions.
*/

#include <linux/device.h>
#include <linux/fs.h>
#include <linux/timer.h>
#include <linux/mod_devicetable.h>

/**
* struct input_dev - represents an input device
* @name: name of the device
* @phys: physical path to the device in the system hierarchy
* @uniq: unique identification code for the device (if device has it)
* @id: id of the device (struct input_id)
* @propbit: bitmap of device properties and quirks
* @evbit: bitmap of types of events supported by the device (EV_KEY,
* EV_REL, etc.)
* @keybit: bitmap of keys/buttons this device has
* @relbit: bitmap of relative axes for the device
* @absbit: bitmap of absolute axes for the device
* @mscbit: bitmap of miscellaneous events supported by the device
* @ledbit: bitmap of leds present on the device
* @sndbit: bitmap of sound effects supported by the device
* @ffbit: bitmap of force feedback effects supported by the device
* @swbit: bitmap of switches present on the device
* @hint_events_per_packet: average number of events generated by the
* device in a packet (between EV_SYN/SYN_REPORT events). Used by
* event handlers to estimate size of the buffer needed to hold
* events.
* @keycodemax: size of keycode table
* @keycodesize: size of elements in keycode table
* @keycode: map of scancodes to keycodes for this device
* @getkeycode: optional legacy method to retrieve current keymap.
* @setkeycode: optional method to alter current keymap, used to implement
* sparse keymaps. If not supplied default mechanism will be used.
* The method is being called while holding event_lock and thus must
* not sleep
* @ff: force feedback structure associated with the device if device
* supports force feedback effects
* @repeat_key: stores key code of the last key pressed; used to implement
* software autorepeat
* @timer: timer for software autorepeat
* @rep: current values for autorepeat parameters (delay, rate)
* @mt: pointer to array of struct input_mt_slot holding current values
* of tracked contacts
* @mtsize: number of MT slots the device uses
* @slot: MT slot currently being transmitted
* @trkid: stores MT tracking ID for the current contact
* @absinfo: array of &struct input_absinfo elements holding information
* about absolute axes (current value, min, max, flat, fuzz,
* resolution)
* @key: reflects current state of device's keys/buttons
* @led: reflects current state of device's LEDs
* @snd: reflects current state of sound effects
* @sw: reflects current state of device's switches
* @open: this method is called when the very first user calls
* input_open_device(). The driver must prepare the device
* to start generating events (start polling thread,
* request an IRQ, submit URB, etc.)
* @close: this method is called when the very last user calls
* input_close_device().
* @flush: purges the device. Most commonly used to get rid of force
* feedback effects loaded into the device when disconnecting
* from it
* @event: event handler for events sent _to_ the device, like EV_LED
* or EV_SND. The device is expected to carry out the requested
* action (turn on a LED, play sound, etc.) The call is protected
* by @event_lock and must not sleep
* @grab: input handle that currently has the device grabbed (via
* EVIOCGRAB ioctl). When a handle grabs a device it becomes sole
* recipient for all input events coming from the device
* @event_lock: this spinlock is is taken when input core receives
* and processes a new event for the device (in input_event()).
* Code that accesses and/or modifies parameters of a device
* (such as keymap or absmin, absmax, absfuzz, etc.) after device
* has been registered with input core must take this lock.
* @mutex: serializes calls to open(), close() and flush() methods
* @users: stores number of users (input handlers) that opened this
* device. It is used by input_open_device() and input_close_device()
* to make sure that dev->open() is only called when the first
* user opens device and dev->close() is called when the very
* last user closes the device
* @going_away: marks devices that are in a middle of unregistering and
* causes input_open_device*() fail with -ENODEV.
* @sync: set to %true when there were no new events since last EV_SYN
* @dev: driver model's view of this device
* @h_list: list of input handles associated with the device. When
* accessing the list dev->mutex must be held
* @node: used to place the device onto input_dev_list
*/
struct input_dev {
const char *name;
const char *phys;
const char *uniq;
struct input_id id;

unsigned long propbit[BITS_TO_LONGS(INPUT_PROP_CNT)];

unsigned long evbit[BITS_TO_LONGS(EV_CNT)];
unsigned long keybit[BITS_TO_LONGS(KEY_CNT)];
unsigned long relbit[BITS_TO_LONGS(REL_CNT)];
unsigned long absbit[BITS_TO_LONGS(ABS_CNT)];
unsigned long mscbit[BITS_TO_LONGS(MSC_CNT)];
unsigned long ledbit[BITS_TO_LONGS(LED_CNT)];
unsigned long sndbit[BITS_TO_LONGS(SND_CNT)];
unsigned long ffbit[BITS_TO_LONGS(FF_CNT)];
unsigned long swbit[BITS_TO_LONGS(SW_CNT)];

unsigned int hint_events_per_packet;

unsigned int keycodemax;
unsigned int keycodesize;
void *keycode;

int (*setkeycode)(struct input_dev *dev,
   const struct input_keymap_entry *ke,
   unsigned int *old_keycode);
int (*getkeycode)(struct input_dev *dev,
   struct input_keymap_entry *ke);

struct ff_device *ff;

unsigned int repeat_key;
struct timer_list timer;

int rep[REP_CNT];

struct input_mt_slot *mt;
int mtsize;
int slot;
int trkid;

struct input_absinfo *absinfo;

unsigned long key[BITS_TO_LONGS(KEY_CNT)];
unsigned long led[BITS_TO_LONGS(LED_CNT)];
unsigned long snd[BITS_TO_LONGS(SND_CNT)];
unsigned long sw[BITS_TO_LONGS(SW_CNT)];

int (*open)(struct input_dev *dev);
void (*close)(struct input_dev *dev);
int (*flush)(struct input_dev *dev, struct file *file);
int (*event)(struct input_dev *dev, unsigned int type, unsigned int code, int value);

struct input_handle __rcu *grab;

spinlock_t event_lock;
struct mutex mutex;

unsigned int users;
bool going_away;

bool sync;

struct device dev;

struct list_head h_list;
struct list_head node;
};
#define to_input_dev(d) container_of(d, struct input_dev, dev)

/*
* Verify that we are in sync with input_device_id mod_devicetable.h #defines
*/

#if EV_MAX != INPUT_DEVICE_ID_EV_MAX
#error "EV_MAX and INPUT_DEVICE_ID_EV_MAX do not match"
#endif

#if KEY_MIN_INTERESTING != INPUT_DEVICE_ID_KEY_MIN_INTERESTING
#error "KEY_MIN_INTERESTING and INPUT_DEVICE_ID_KEY_MIN_INTERESTING do not match"
#endif

#if KEY_MAX != INPUT_DEVICE_ID_KEY_MAX
#error "KEY_MAX and INPUT_DEVICE_ID_KEY_MAX do not match"
#endif

#if REL_MAX != INPUT_DEVICE_ID_REL_MAX
#error "REL_MAX and INPUT_DEVICE_ID_REL_MAX do not match"
#endif

#if ABS_MAX != INPUT_DEVICE_ID_ABS_MAX
#error "ABS_MAX and INPUT_DEVICE_ID_ABS_MAX do not match"
#endif

#if MSC_MAX != INPUT_DEVICE_ID_MSC_MAX
#error "MSC_MAX and INPUT_DEVICE_ID_MSC_MAX do not match"
#endif

#if LED_MAX != INPUT_DEVICE_ID_LED_MAX
#error "LED_MAX and INPUT_DEVICE_ID_LED_MAX do not match"
#endif

#if SND_MAX != INPUT_DEVICE_ID_SND_MAX
#error "SND_MAX and INPUT_DEVICE_ID_SND_MAX do not match"
#endif

#if FF_MAX != INPUT_DEVICE_ID_FF_MAX
#error "FF_MAX and INPUT_DEVICE_ID_FF_MAX do not match"
#endif

#if SW_MAX != INPUT_DEVICE_ID_SW_MAX
#error "SW_MAX and INPUT_DEVICE_ID_SW_MAX do not match"
#endif

#define INPUT_DEVICE_ID_MATCH_DEVICE \
(INPUT_DEVICE_ID_MATCH_BUS | INPUT_DEVICE_ID_MATCH_VENDOR | INPUT_DEVICE_ID_MATCH_PRODUCT)
#define INPUT_DEVICE_ID_MATCH_DEVICE_AND_VERSION \
(INPUT_DEVICE_ID_MATCH_DEVICE | INPUT_DEVICE_ID_MATCH_VERSION)

struct input_handle;

/**
* struct input_handler - implements one of interfaces for input devices
* @private: driver-specific data
* @event: event handler. This method is being called by input core with
* interrupts disabled and dev->event_lock spinlock held and so
* it may not sleep
* @filter: similar to @event; separates normal event handlers from
* "filters".
* @match: called after comparing device's id with handler's id_table
* to perform fine-grained matching between device and handler
* @connect: called when attaching a handler to an input device
* @disconnect: disconnects a handler from input device
* @start: starts handler for given handle. This function is called by
* input core right after connect() method and also when a process
* that "grabbed" a device releases it
* @fops: file operations this driver implements
* @minor: beginning of range of 32 minors for devices this driver
* can provide
* @name: name of the handler, to be shown in /proc/bus/input/handlers
* @id_table: pointer to a table of input_device_ids this driver can
* handle
* @h_list: list of input handles associated with the handler
* @node: for placing the driver onto input_handler_list
*
* Input handlers attach to input devices and create input handles. There
* are likely several handlers attached to any given input device at the
* same time. All of them will get their copy of input event generated by
* the device.
*
* The very same structure is used to implement input filters. Input core
* allows filters to run first and will not pass event to regular handlers
* if any of the filters indicate that the event should be filtered (by
* returning %true from their filter() method).
*
* Note that input core serializes calls to connect() and disconnect()
* methods.
*/
struct input_handler {

void *private;

void (*event)(struct input_handle *handle, unsigned int type, unsigned int code, int value);
bool (*filter)(struct input_handle *handle, unsigned int type, unsigned int code, int value);
bool (*match)(struct input_handler *handler, struct input_dev *dev);
int (*connect)(struct input_handler *handler, struct input_dev *dev, const struct input_device_id *id);
void (*disconnect)(struct input_handle *handle);
void (*start)(struct input_handle *handle);

const struct file_operations *fops;
int minor;
const char *name;

const struct input_device_id *id_table;

struct list_head h_list;
struct list_head node;
};

/**
* struct input_handle - links input device with an input handler
* @private: handler-specific data
* @open: counter showing whether the handle is 'open', i.e. should deliver
* events from its device
* @name: name given to the handle by handler that created it
* @dev: input device the handle is attached to
* @handler: handler that works with the device through this handle
* @d_node: used to put the handle on device's list of attached handles
* @h_node: used to put the handle on handler's list of handles from which
* it gets events
*/
struct input_handle {

void *private;

int open;
const char *name;

struct input_dev *dev;
struct input_handler *handler;

struct list_head d_node;
struct list_head h_node;
};

struct input_dev *input_allocate_device(void);
void input_free_device(struct input_dev *dev);

static inline struct input_dev *input_get_device(struct input_dev *dev)
{
return dev ? to_input_dev(get_device(&dev->dev)) : NULL;
}

static inline void input_put_device(struct input_dev *dev)
{
if (dev)
put_device(&dev->dev);
}

static inline void *input_get_drvdata(struct input_dev *dev)
{
return dev_get_drvdata(&dev->dev);
}

static inline void input_set_drvdata(struct input_dev *dev, void *data)
{
dev_set_drvdata(&dev->dev, data);
}

int __must_check input_register_device(struct input_dev *);
void input_unregister_device(struct input_dev *);

void input_reset_device(struct input_dev *);

int __must_check input_register_handler(struct input_handler *);
void input_unregister_handler(struct input_handler *);

int input_handler_for_each_handle(struct input_handler *, void *data,
   int (*fn)(struct input_handle *, void *));

int input_register_handle(struct input_handle *);
void input_unregister_handle(struct input_handle *);

int input_grab_device(struct input_handle *);
void input_release_device(struct input_handle *);

int input_open_device(struct input_handle *);
void input_close_device(struct input_handle *);

int input_flush_device(struct input_handle *handle, struct file *file);

void input_event(struct input_dev *dev, unsigned int type, unsigned int code, int value);
void input_inject_event(struct input_handle *handle, unsigned int type, unsigned int code, int value);

static inline void input_report_key(struct input_dev *dev, unsigned int code, int value)
{
input_event(dev, EV_KEY, code, !!value);
}

static inline void input_report_rel(struct input_dev *dev, unsigned int code, int value)
{
input_event(dev, EV_REL, code, value);
}

static inline void input_report_abs(struct input_dev *dev, unsigned int code, int value)
{
input_event(dev, EV_ABS, code, value);
}

static inline void input_report_ff_status(struct input_dev *dev, unsigned int code, int value)
{
input_event(dev, EV_FF_STATUS, code, value);
}

static inline void input_report_switch(struct input_dev *dev, unsigned int code, int value)
{
input_event(dev, EV_SW, code, !!value);
}

static inline void input_sync(struct input_dev *dev)
{
input_event(dev, EV_SYN, SYN_REPORT, 0);
}

static inline void input_mt_sync(struct input_dev *dev)
{
input_event(dev, EV_SYN, SYN_MT_REPORT, 0);
}

void input_set_capability(struct input_dev *dev, unsigned int type, unsigned int code);

/**
* input_set_events_per_packet - tell handlers about the driver event rate
* @dev: the input device used by the driver
* @n_events: the average number of events between calls to input_sync()
*
* If the event rate sent from a device is unusually large, use this
* function to set the expected event rate. This will allow handlers
* to set up an appropriate buffer size for the event stream, in order
* to minimize information loss.
*/
static inline void input_set_events_per_packet(struct input_dev *dev, int n_events)
{
dev->hint_events_per_packet = n_events;
}

void input_alloc_absinfo(struct input_dev *dev);
void input_set_abs_params(struct input_dev *dev, unsigned int axis,
   int min, int max, int fuzz, int flat);

#define INPUT_GENERATE_ABS_ACCESSORS(_suffix, _item) \
static inline int input_abs_get_##_suffix(struct input_dev *dev, \
   unsigned int axis) \
{ \
return dev->absinfo ? dev->absinfo[axis]._item : 0; \
} \
\
static inline void input_abs_set_##_suffix(struct input_dev *dev, \
   unsigned int axis, int val) \
{ \
input_alloc_absinfo(dev); \
if (dev->absinfo) \
dev->absinfo[axis]._item = val; \
}

INPUT_GENERATE_ABS_ACCESSORS(val, value)
INPUT_GENERATE_ABS_ACCESSORS(min, minimum)
INPUT_GENERATE_ABS_ACCESSORS(max, maximum)
INPUT_GENERATE_ABS_ACCESSORS(fuzz, fuzz)
INPUT_GENERATE_ABS_ACCESSORS(flat, flat)
INPUT_GENERATE_ABS_ACCESSORS(res, resolution)

int input_scancode_to_scalar(const struct input_keymap_entry *ke,
      unsigned int *scancode);

int input_get_keycode(struct input_dev *dev, struct input_keymap_entry *ke);
int input_set_keycode(struct input_dev *dev,
      const struct input_keymap_entry *ke);

extern struct class input_class;

/**
* struct ff_device - force-feedback part of an input device
* @upload: Called to upload an new effect into device
* @erase: Called to erase an effect from device
* @playback: Called to request device to start playing specified effect
* @set_gain: Called to set specified gain
* @set_autocenter: Called to auto-center device
* @destroy: called by input core when parent input device is being
* destroyed
* @private: driver-specific data, will be freed automatically
* @ffbit: bitmap of force feedback capabilities truly supported by
* device (not emulated like ones in input_dev->ffbit)
* @mutex: mutex for serializing access to the device
* @max_effects: maximum number of effects supported by device
* @effects: pointer to an array of effects currently loaded into device
* @effect_owners: array of effect owners; when file handle owning
* an effect gets closed the effect is automatically erased
*
* Every force-feedback device must implement upload() and playback()
* methods; erase() is optional. set_gain() and set_autocenter() need
* only be implemented if driver sets up FF_GAIN and FF_AUTOCENTER
* bits.
*
* Note that playback(), set_gain() and set_autocenter() are called with
* dev->event_lock spinlock held and interrupts off and thus may not
* sleep.
*/
struct ff_device {
int (*upload)(struct input_dev *dev, struct ff_effect *effect,
      struct ff_effect *old);
int (*erase)(struct input_dev *dev, int effect_id);

int (*playback)(struct input_dev *dev, int effect_id, int value);
void (*set_gain)(struct input_dev *dev, u16 gain);
void (*set_autocenter)(struct input_dev *dev, u16 magnitude);

void (*destroy)(struct ff_device *);

void *private;

unsigned long ffbit[BITS_TO_LONGS(FF_CNT)];

struct mutex mutex;

int max_effects;
struct ff_effect *effects;
struct file *effect_owners[];
};

int input_ff_create(struct input_dev *dev, unsigned int max_effects);
void input_ff_destroy(struct input_dev *dev);

int input_ff_event(struct input_dev *dev, unsigned int type, unsigned int code, int value);

int input_ff_upload(struct input_dev *dev, struct ff_effect *effect, struct file *file);
int input_ff_erase(struct input_dev *dev, int effect_id, struct file *file);

int input_ff_create_memless(struct input_dev *dev, void *data,
int (*play_effect)(struct input_dev *, void *, struct ff_effect *));

#endif
#endif

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