在drivers/input/touchscreen/ft5302_tp/ft5302_ts.c中

module_init(ft5x0x_ts_init);

static int __init ft5x0x_ts_init(void)

{

ret = i2c_add_driver(&ft5x0x_ts_driver);

return ret;

}

其中ft5x0x_ts_driver结构如下:

static struct i2c_driver ft5x0x_ts_driver = {

.probe = ft5x0x_ts_probe,

.remove = __devexit_p(ft5x0x_ts_remove),

.id_table = ft5x0x_ts_id,

.driver = {

.name = FT5X0X_NAME,

.owner = THIS_MODULE,

},

};

在probe函数中

static int ft5x0x_ts_probe(struct i2c_client *client, const struct i2c_device_id *id)

{

struct ft5x0x_ts_dev *ft5x0x_ts;

struct ft5x0x_platform_data *pdata = pdata = client->dev.platform_data;

struct input_dev *input_dev;

u8 buf_w[1];

u8 buf_r[1];

unsigned char reg_value;

unsigned char reg_version;

int result, irq = 0;

ft5x0x_ts = (struct ft5x0x_ts_dev *)kzalloc(sizeof(*ft5x0x_ts), GFP_KERNEL);

input_dev = input_allocate_device();

ft5x0x_ts->input_dev = input_dev;

ft5x0x_ts->client = this_client = client;

ft5x0x_ts->irq = client->irq;

__set_bit(EV_ABS, input_dev->evbit);

__set_bit(EV_KEY, input_dev->evbit);

__set_bit(EV_REP, input_dev->evbit);

__set_bit(INPUT_PROP_DIRECT, input_dev->propbit);

set_bit(ABS_MT_POSITION_X, input_dev->absbit);

set_bit(ABS_MT_POSITION_Y, input_dev->absbit);

set_bit(ABS_MT_TOUCH_MAJOR, input_dev->absbit);

set_bit(ABS_MT_WIDTH_MAJOR, input_dev->absbit);

input_mt_init_slots(input_dev, MAX_CONTACTS);

input_set_abs_params(input_dev,ABS_MT_POSITION_X, 0, SCREEN_MAX_X, 0, 0);

input_set_abs_params(input_dev,ABS_MT_POSITION_Y, 0, SCREEN_MAX_Y, 0, 0);

input_set_abs_params(input_dev,ABS_MT_TOUCH_MAJOR, 0, PRESS_MAX, 0, 0);

input_set_abs_params(input_dev,ABS_MT_WIDTH_MAJOR, 0, 200, 0, 0);

input_dev->name = FT5X0X_NAME;

input_register_device(input_dev);

g_dev = ft5x0x_ts;

i2c_set_clientdata(client, ft5x0x_ts);

INIT_WORK(&ft5x0x_ts->pen_event_work, ft5x0x_ts_pen_irq_work); //动态建立一个工作队列

ft5x0x_ts->ts_workqueue = create_workqueue(FT5X0X_NAME);

ft5x0x_ts->irq = gpio_to_irq(ft5x0x_ts->irq);

err0:

msleep(200);

fts_register_read(FT5X0X_REG_FIRMID, &reg_version,1);

fts_register_read(FT5X0X_REG_REPORT_RATE, &reg_value,1);

fts_register_read(FT5X0X_REG_THRES, &reg_value,1);

fts_register_read(FT5X0X_REG_NOISE_MODE, &reg_value,1);

//注册中断

request_irq(ft5x0x_ts->irq, ft5x0x_ts_interrupt, IRQF_TRIGGER_FALLING, "ft5x0x_ts", ft5x0x_ts);

disable_irq_nosync(g_dev->irq);

//打开中断

enable_irq(g_dev->irq);

return 0;

}

当有按键按下时

static irqreturn_t ft5x0x_ts_interrupt(int irq, void *dev_id)

{

struct ft5x0x_ts_dev *ft5x0x_ts = dev_id;

del_timer(&ft5x0x_ts->timer); //关闭内核定时器

disable_irq_nosync(g_dev->irq); //关中断

queue_work(ft5x0x_ts->ts_workqueue, &ft5x0x_ts->pen_event_work); //把任务交给指定的工作队列

return IRQ_HANDLED;

}

INIT_WORK(&ft5x0x_ts->pen_event_work, ft5x0x_ts_pen_irq_work); //动态建立一个工作队列

进入工作队列处理函数:

static void ft5x0x_ts_pen_irq_work(struct work_struct *work)

{

ft5x0x_read_data();

ft5x0x_report_value();

enable_irq(g_dev->irq);

}

static int ft5x0x_read_data(void)

{

struct ft5x0x_ts_dev *data = i2c_get_clientdata(g_dev->client);

struct ts_event *event = &data->event;

u8 buf[61]= {0};

ret = ft5x0x_i2c_rxdata(buf, 61); //读取数据

memset(event, ~0x00, sizeof(struct ts_event));

event->touch_point = buf[2] & 0x0f; //查看有几个手指按下

if (event->touch_point == 0) { //如果没有手指按下,直接返回

return 0;

}

switch (event->touch_point) { //最多只能看到5个手指

case 5: //将手指的状态与坐标值记录下来

event->point[4].status = (buf[0x1b] & 0xc0)>>6;

event->point[4].id = (buf[0x1d] & 0xf0)>>4;

event->point[4].x = ((s16)(buf[0x1b] & 0x07)<<8 | (s16)buf[0x1c]);

event->point[4].y = (s16)(buf[0x1d] & 0x07)<<8 | (s16)buf[0x1e];

case 4:

case 3:

case 2:

case 1:

event->point[0].status = (buf[0x03] & 0xc0)>>6;

event->point[0].id = (buf[0x05] & 0xf0)>>4;

event->point[0].x= (s16)(buf[0x03] & 0x07)<<8 | (s16)buf[0x04];

event->point[0].y = (s16)(buf[0x05] & 0x07)<<8 | (s16)buf[0x06];

default:

return 0;

}

}

static void ft5x0x_report_value(void)

{

struct ft5x0x_ts_dev *data = i2c_get_clientdata(g_dev->client);

struct ts_event *event = &data->event;

int key_id = 0xff;

down_table = 0;

for(i=0; itouch_point; i++)

{

event->point[i].x=event->point[i].x;

input_mt_slot(data->input_dev, event->point[i].id);

input_report_abs(data->input_dev, ABS_MT_TRACKING_ID, event->point[i].id);

down_table |= 1 << event->point[i].id;

input_report_abs(data->input_dev, ABS_MT_TOUCH_MAJOR, 100);

input_report_abs(data->input_dev, ABS_MT_POSITION_X, event->point[i].x);

input_report_abs(data->input_dev, ABS_MT_POSITION_Y, event->point[i].y);

input_report_abs(data->input_dev, ABS_MT_WIDTH_MAJOR, 100);

}

for(i=0; i

if( ( (~down_table) & 1<

{

input_mt_slot(data->input_dev, i);

input_report_abs(data->input_dev, ABS_MT_TRACKING_ID, -1);

}

}

up_table = ~down_table;

input_sync(data->input_dev);

}

关于内核定时器: setup_timer(&ft5x0x_ts->timer, Touch_timer_release, (unsigned long)ft5x0x_ts); data->timer.expires = jiffies +8; add_timer(&data->timer); 时间一到执行内核定时器处理函数 static void Touch_timer_release(unsigned long ft_ts_pdev) { do_something(); }