linux-i2c.zip_LINUX iic 驱动_TINY4412_i2c子系统_linux3.5的IIC子系统模型_tin

/* * * *文件名称 : my_i2c_dri.c * *功能 : i2c 驱动端 * *时间 : 2017年1月3日16:27:07 * */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/i2c.h> #include <linux/input.h> #include <linux/delay.h> #include <linux/slab.h> #include <linux/interrupt.h> #include <linux/irq.h> #include <linux/gpio.h> #include <linux/platform_device.h> #include <mach/gpio.h> #include <plat/gpio-cfg.h> #include <plat/ctouch.h> #include <plat/ft5x0x_touch.h> #include <linux/timer.h> typedef struct touchScreens { u32 points; u32 x; u32 y; u8 pressure; }T_touchScreens,*PT_touchScreens; T_touchScreens touchData; //static struct timer_list timerlist; static struct i2c_client *clt = NULL; static struct input_dev *xyd_idev = NULL; static struct work_struct xyd_work; static DEFINE_SEMAPHORE(sem); static void test_to_user(struct i2c_client *client){ s32 ret; ret = i2c_smbus_read_byte_data(client, 0xa6); printk("<0>Firmware ID = %d",ret); ret = i2c_smbus_read_byte_data(client, 0xa8); printk("<0>CTPM Vendor ID = %d",ret); i2c_smbus_write_byte_data(client,0xa5,0); ret = i2c_smbus_read_byte_data(client, 0xa5); printk("<0>Power Consume Mode = %d",ret); /*int set = 0xa6; i2c_master_send(client, (char *)&set, 1); i2c_master_recv(client, (char *)&set, 1); printk("<0>ID = %d ",set); */ } static void work_hendler(struct work_struct *arg){ s32 ret; u8 buf[1024]= {0}; down_interruptible(&sem); ret = i2c_smbus_read_i2c_block_data(clt,0x00,7,buf); if(ret == 0){ printk("<0>read is failed \r\n"); } if((buf[2]&0x0f) == 0){ // printk("-----------------\n"); input_report_abs(xyd_idev, ABS_PRESSURE, 0); input_report_key(xyd_idev, BTN_TOUCH, 0); input_sync(xyd_idev); } if((buf[2]&0x0f) == 1){ u16 x = (u16)(((buf[3]&0x0f) << 8) | buf[4]); u16 y = (u16)(((buf[5]&0x0f) << 8) | buf[6]); touchData.x = x; touchData.y = y; touchData.pressure = 1; input_report_abs(xyd_idev, ABS_X, touchData.x); input_report_abs(xyd_idev, ABS_Y, touchData.y); input_report_abs(xyd_idev, ABS_PRESSURE, touchData.pressure); input_report_key(xyd_idev, BTN_TOUCH, 1); input_sync(xyd_idev); } up(&sem); } //static void timer_handler(unsigned long data){ // schedule_work(&xyd_work); //} static irqreturn_t xyd_irq_handler(int argc, void *argv){ // mod_timer(&timerlist,jiffies + msecs_to_jiffies(5)); schedule_work(&xyd_work); return IRQ_HANDLED; } static int xyd_probe(struct i2c_client *xyd_client, const struct i2c_device_id *id){ clt = xyd_client; xyd_idev = input_allocate_device(); __set_bit(EV_ABS, xyd_idev->evbit); __set_bit(ABS_X, xyd_idev->absbit); __set_bit(ABS_Y, xyd_idev->absbit); __set_bit(ABS_PRESSURE, xyd_idev->absbit); __set_bit(EV_SYN, xyd_idev->evbit); __set_bit(EV_KEY, xyd_idev->evbit); __set_bit(BTN_TOUCH, xyd_idev->keybit); input_set_abs_params(xyd_idev, ABS_X, 0, 799, 0, 0); input_set_abs_params(xyd_idev, ABS_Y, 0, 479, 0, 0); input_set_abs_params(xyd_idev, ABS_PRESSURE, 0, 1 ,0, 0); input_register_device(xyd_idev); test_to_user(clt); INIT_WORK(&xyd_work,work_hendler); request_irq(IRQ_EINT(14),xyd_irq_handler,IRQF_TRIGGER_FALLING,"xyd_i2c",&touchData); //init_timer(&timerlist); //setup_timer(&timerlist,&timer_handler,(unsigned long)0); return 0; } static int xyd_remove(struct i2c_client *xyd_client){ printk("<0>xyd_remove !!!!!!\r\n"); free_irq(IRQ_EINT(14),&touchData); input_unregister_device(xyd_idev); return 0; } static const struct i2c_device_id xyd_id[] = { { "xydI2c", 0 }, }; static struct i2c_driver xyd_driver = { .driver = { .name = "xydI2c", }, .probe = xyd_probe, .remove =xyd_remove, .id_table = xyd_id, }; static int __init xyd_i2c_driInit(void){ i2c_add_driver(&xyd_driver); return 0; } static void __exit xyd_i2c_driExit(void){ i2c_del_driver(&xyd_driver); } module_init(xyd_i2c_driInit); module_exit(xyd_i2c_driExit); MODULE_LICENSE("GPL");