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	 > 嵌入式系統(tǒng) > 設計應用 > S5PV210(TQ210)學習筆記——觸摸屏驅動編寫
          
    
          

          

          


	
	
	

          
	
          
		
          
			
          S5PV210(TQ210)學習筆記——觸摸屏驅動編寫
          
						
          
				作者：
				時間：2016-11-28
				來源：網絡
				
				
				
				
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        1. config_info[62]=480>>8;
        2. config_info[61]=480&0xff;
        3. config_info[64]=800>>8;
        4. config_info[63]=800&0xff;
        5. ret=i2c_write_bytes(client,config_info,sizeof(config_info)/sizeof(config_info[0]));
        6. if(ret<0){
        7. printk(KERN_ERR"GT811Sendconfigfailed!");
        8. returnret;
        9. }
        10. return0;
        11. }
        13. staticirqreturn_tgt811_int_handler(intirq,void*devid){
        14. disable_irq_nosync(this_client->irq);
        15. queue_work(wq,&work);
        16. returnIRQ_RETVAL(IRQ_HANDLED);
        17. }
        19. staticvoidts_work_func(structwork_struct*work){
        20. intret;
        21. unsignedcharpoint_data[19]={0x07,0x21,0};
        22. unsignedshortinput_x=0;
        23. unsignedshortinput_y=0;
        24. unsignedshortinput_p=0;
        26. ret=i2c_read_bytes(this_client,point_data,sizeof(point_data)/sizeof(point_data[0]));
        27. if(ret<=0){
        28. printk("Failed");
        29. return;
        30. }
        32. if(point_data[2]&0x1){
        33. status=1;
        34. input_y=479-((point_data[4]<<8)|point_data[5]);
        35. input_x=799-((point_data[6]<<8)|point_data[7]);
        36. input_p=point_data[8];
        38. printk("stat:%d,x:%d,y:%d,p:%d",point_data[2],input_x,input_y,
        39. input_p);
        40. }
        41. elseif(status){
        42. status=0;
        43. printk("up");
        44. }
        46. enable_irq(this_client->irq);
        47. }
        49. staticintts_probe(structi2c_client*client,conststructi2c_device_id*id){
        50. intretry,ret;
        51. chartest_data;
        53. printk("ts_probe");
        55. test_data=0;
        57. gt811_rst=S5PV210_GPD0(3);
        58. gt811_int=S5PV210_GPH1(6);
        59. gpio_request(gt811_rst,"reset");
        60. gpio_request(gt811_rst,"tsint");
        62. if(!i2c_check_functionality(client->adapter,I2C_FUNC_I2C))
        63. {
        64. dev_err(&client->dev,"MusthaveI2C_FUNC_I2C.");
        65. return-ENODEV;
        66. }
        68. s3c_gpio_setpull(gt811_rst,S3C_GPIO_PULL_UP);
        70. for(retry=0;retry<5;retry++)
        71. {
        72. gpio_direction_output(gt811_rst,0);
        73. msleep(1);
        74. gpio_direction_input(gt811_rst);
        75. msleep(100);
        77. ret=i2c_write_bytes(client,&test_data,1);
        78. if(ret>0)
        79. break;
        80. dev_info(&client->dev,"GT811I2CTESTFAILED!PleasechecktheHARDWAREconnect");
        81. }
        83. if(ret<=0)
        84. {
        85. dev_err(&client->dev,"Warnning:I2CcommunicationmightbeERROR!");
        86. return-ENODEV;
        87. }
        89. for(retry=0;retry!=5;++retry){
        90. ret=ts_init_panel(client);
        91. if(ret!=0){
        92. continue;
        93. }
        94. else{
        95. break;
        96. }
        97. }
        99. if(ret!=0){
        100. printk("GT811Configuefailed!");
        101. return-ENODEV;
        102. }
        104. this_client=client;
        106. ts_input=input_allocate_device();
        107. if(IS_ERR(ts_input)){
        108. printk("GT811allocatetsinputdevicefailed!");
        109. return-ENOMEM;
        110. }
        112. ts_input->evbit[0]=BIT_MASK(EV_SYN)|BIT_MASK(EV_KEY)|BIT_MASK(EV_ABS);
        113. ts_input->keybit[BIT_WORD(BTN_TOUCH)]=BIT_MASK(BTN_TOUCH);
        114. ts_input->absbit[0]=BIT(ABS_X)|BIT(ABS_Y)|BIT(ABS_PRESSURE);
        116. input_set_abs_params(ts_input,ABS_Y,0,799,0,0);
        117. input_set_abs_params(ts_input,ABS_X,0,479,0,0);
        118. input_set_abs_params(ts_input,ABS_PRESSURE,0,255,0,0);
        120. ts_input->name="tq210-ts";
        121. ts_input->phys="input/ts";
        122. ts_input->id.bustype=BUS_I2C;
        123. ts_input->id.product=0xBEEF;
        124. ts_input->id.vendor=0xDEAD;
        126. ret=input_register_device(ts_input);
        127. if(ret<0){
        128. printk("Unableregister%sinputdevice!",ts_input->name);
        129. input_free_device(ts_input);
        130. return-ENOMEM;
        131. }
        133. client->irq=IRQ_EINT(14);
        135. s3c_gpio_setpull(gt811_int,S3C_GPIO_PULL_UP);
        137. if(request_irq(IRQ_EINT(14),gt811_int_handler,IRQF_TRIGGER_FALLING,"gt811-int",NULL)<0){
        138. printk("Requestirqforgt811failed!");
        139. input_unregister_device(ts_input);
        140. input_free_device(ts_input);
        141. return-ENOMEM;
        142. }
        144. wq=create_workqueue("ts_handle_thread");
        145. if(wq==NULL){
        146. printk(KERN_ALERT"creteworkqueuefailed!");
        147. input_unregister_device(ts_input);
        148. input_free_device(ts_input);
        149. free_irq(IRQ_EINT(14),NULL);
        150. return-ENOMEM;
        151. }
        153. INIT_WORK(&work,ts_work_func);
        155. return0;
        156. }
        158. staticintts_remove(structi2c_client*client){
        160. free_irq(IRQ_EINT(14),NULL);
        161. enable_irq(client->irq);
        162. flush_workqueue(wq);
        163. destroy_workqueue(wq);
        165. input_unregister_device(ts_input);
        166. input_free_device(ts_input);
        168. gpio_free(gt811_rst);
        169. gpio_free(gt811_int);
        170. return0;
        171. }				   
				
            
                
			
							
          
                
			            
                            
              
            
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