S5PV210(TQ210)学习笔记——触摸屏驱动编写 作者： 时间：2016-11-28 来源：网络 收藏 config_info[62]=480>>8;config_info[61]=480&0xff;config_info[64]=800>>8;config_info[63]=800&0xff;ret=i2c_write_bytes(client,config_info,sizeof(config_info)/sizeof(config_info[0]));if(ret<0){printk(KERN_ERR"GT811Sendconfigfailed!");returnret;}return0;}staticirqreturn_tgt811_int_handler(intirq,void*devid){disable_irq_nosync(this_client->irq);queue_work(wq,&work);returnIRQ_RETVAL(IRQ_HANDLED);}staticvoidts_work_func(structwork_struct*work){intret;unsignedcharpoint_data[19]={0x07,0x21,0};unsignedshortinput_x=0;unsignedshortinput_y=0;unsignedshortinput_p=0;ret=i2c_read_bytes(this_client,point_data,sizeof(point_data)/sizeof(point_data[0]));if(ret<=0){printk("Failed");return;}if(point_data[2]&0x1){status=1;input_y=479-((point_data[4]<<8)|point_data[5]);input_x=799-((point_data[6]<<8)|point_data[7]);input_p=point_data[8];printk("stat:%d,x:%d,y:%d,p:%d",point_data[2],input_x,input_y,input_p);}elseif(status){status=0;printk("up");}enable_irq(this_client->irq);}staticintts_probe(structi2c_client*client,conststructi2c_device_id*id){intretry,ret;chartest_data;printk("ts_probe");test_data=0;gt811_rst=S5PV210_GPD0(3);gt811_int=S5PV210_GPH1(6);gpio_request(gt811_rst,"reset");gpio_request(gt811_rst,"tsint");if(!i2c_check_functionality(client->adapter,I2C_FUNC_I2C)){dev_err(&client->dev,"MusthaveI2C_FUNC_I2C.");return-ENODEV;}s3c_gpio_setpull(gt811_rst,S3C_GPIO_PULL_UP);for(retry=0;retry<5;retry++){gpio_direction_output(gt811_rst,0);msleep(1);gpio_direction_input(gt811_rst);msleep(100);ret=i2c_write_bytes(client,&test_data,1);if(ret>0)break;dev_info(&client->dev,"GT811I2CTESTFAILED!PleasechecktheHARDWAREconnect");}if(ret<=0){dev_err(&client->dev,"Warnning:I2CcommunicationmightbeERROR!");return-ENODEV;}for(retry=0;retry!=5;++retry){ret=ts_init_panel(client);if(ret!=0){continue;}else{break;}}if(ret!=0){printk("GT811Configuefailed!");return-ENODEV;}this_client=client;ts_input=input_allocate_device();if(IS_ERR(ts_input)){printk("GT811allocatetsinputdevicefailed!");return-ENOMEM;}ts_input->evbit[0]=BIT_MASK(EV_SYN)|BIT_MASK(EV_KEY)|BIT_MASK(EV_ABS);ts_input->keybit[BIT_WORD(BTN_TOUCH)]=BIT_MASK(BTN_TOUCH);ts_input->absbit[0]=BIT(ABS_X)|BIT(ABS_Y)|BIT(ABS_PRESSURE);input_set_abs_params(ts_input,ABS_Y,0,799,0,0);input_set_abs_params(ts_input,ABS_X,0,479,0,0);input_set_abs_params(ts_input,ABS_PRESSURE,0,255,0,0);ts_input->name="tq210-ts";ts_input->phys="input/ts";ts_input->id.bustype=BUS_I2C;ts_input->id.product=0xBEEF;ts_input->id.vendor=0xDEAD;ret=input_register_device(ts_input);if(ret<0){printk("Unableregister%sinputdevice!",ts_input->name);input_free_device(ts_input);return-ENOMEM;}client->irq=IRQ_EINT(14);s3c_gpio_setpull(gt811_int,S3C_GPIO_PULL_UP);if(request_irq(IRQ_EINT(14),gt811_int_handler,IRQF_TRIGGER_FALLING,"gt811-int",NULL)<0){printk("Requestirqforgt811failed!");input_unregister_device(ts_input);input_free_device(ts_input);return-ENOMEM;}wq=create_workqueue("ts_handle_thread");if(wq==NULL){printk(KERN_ALERT"creteworkqueuefailed!");input_unregister_device(ts_input);input_free_device(ts_input);free_irq(IRQ_EINT(14),NULL);return-ENOMEM;}INIT_WORK(&work,ts_work_func);return0;}staticintts_remove(structi2c_client*client){free_irq(IRQ_EINT(14),NULL);enable_irq(client->irq);flush_workqueue(wq);destroy_workqueue(wq);input_unregister_device(ts_input);input_free_device(ts_input);gpio_free(gt811_rst);gpio_free(gt811_int);return0;} 上一页 1 2 3 下一页
评论