arch/arm/mach-mt8127/tpw8127_c_mlc/touchpanel/mtk_tpd.c

   1 /******************************************************************************
   2  * mtk_tpd.c - MTK Android Linux Touch Panel Device Driver               *
   3  *                                                                            *
   4  * Copyright 2008-2009 MediaTek Co.,Ltd.                                      *
   5  *                                                                            *
   6  * DESCRIPTION:                                                               *
   7  *     this file provide basic touch panel event to input sub system          *
   8  *                                                                            *
   9  * AUTHOR:                                                                    *
  10  *     Kirby.Wu (mtk02247)                                                    *
  11  *                                                                            *
  12  * NOTE:                                                                      *
  13  * 1. Sensitivity for touch screen should be set to edge-sensitive.           *
  14  *    But in this driver it is assumed to be done by interrupt core,          *
  15  *    though not done yet. Interrupt core may provide interface to            *
  16  *    let drivers set the sensitivity in the future. In this case,            *
  17  *    this driver should set the sensitivity of the corresponding IRQ         *
  18  *    line itself.                                                            *
  19  ******************************************************************************/
  20
  21 #include "tpd.h"
  22
  23 //#ifdef VELOCITY_CUSTOM
  24 #include <linux/slab.h>
  25 #include <linux/device.h>
  26 #include <linux/miscdevice.h>
  27 #include <linux/device.h>
  28 #include <linux/slab.h>
  29 #include <asm/uaccess.h>
  30
  31 // for magnify velocity********************************************
  32 #define TOUCH_IOC_MAGIC 'A'
  33
  34 #define TPD_GET_VELOCITY_CUSTOM_X _IO(TOUCH_IOC_MAGIC,0)
  35 #define TPD_GET_VELOCITY_CUSTOM_Y _IO(TOUCH_IOC_MAGIC,1)
  36
  37 extern int tpd_v_magnify_x;
  38 extern int tpd_v_magnify_y;
  39 extern UINT32 DISP_GetScreenHeight(void);
  40 extern UINT32 DISP_GetScreenWidth(void);
  41
  42 static int tpd_misc_open(struct inode *inode, struct file *file)
  43 {
  44     return nonseekable_open(inode, file);
  45 }
  46
  47 static int tpd_misc_release(struct inode *inode, struct file *file)
  48 {
  49     return 0;
  50 }
  51
  52 static long tpd_unlocked_ioctl(struct file *file, unsigned int cmd,
  53                                unsigned long arg)
  54 {
  55     //char strbuf[256];
  56     void __user *data;
  57
  58     long err = 0;
  59
  60     if (_IOC_DIR(cmd) & _IOC_READ)
  61     {
  62         err = !access_ok(VERIFY_WRITE, (void __user *)arg, _IOC_SIZE(cmd));
  63     }
  64     else if (_IOC_DIR(cmd) & _IOC_WRITE)
  65     {
  66         err = !access_ok(VERIFY_READ, (void __user *)arg, _IOC_SIZE(cmd));
  67     }
  68
  69     if (err)
  70     {
  71         printk("tpd: access error: %08X, (%2d, %2d)\n", cmd, _IOC_DIR(cmd), _IOC_SIZE(cmd));
  72         return -EFAULT;
  73     }
  74
  75     switch (cmd)
  76     {
  77         case TPD_GET_VELOCITY_CUSTOM_X:
  78             data = (void __user *) arg;
  79
  80             if (data == NULL)
  81             {
  82                 err = -EINVAL;
  83                 break;
  84             }
  85
  86             if (copy_to_user(data, &tpd_v_magnify_x, sizeof(tpd_v_magnify_x)))
  87             {
  88                 err = -EFAULT;
  89                 break;
  90             }
  91
  92             break;
  93
  94         case TPD_GET_VELOCITY_CUSTOM_Y:
  95             data = (void __user *) arg;
  96
  97             if (data == NULL)
  98             {
  99                 err = -EINVAL;
 100                 break;
 101             }
 102
 103             if (copy_to_user(data, &tpd_v_magnify_y, sizeof(tpd_v_magnify_y)))
 104             {
 105                 err = -EFAULT;
 106                 break;
 107             }
 108
 109             break;
 110
 111         default:
 112             printk("tpd: unknown IOCTL: 0x%08x\n", cmd);
 113             err = -ENOIOCTLCMD;
 114             break;
 115
 116     }
 117
 118     return err;
 119 }
 120
 121
 122 static struct file_operations tpd_fops =
 123 {
 124 //      .owner = THIS_MODULE,
 125     .open = tpd_misc_open,
 126     .release = tpd_misc_release,
 127     .unlocked_ioctl = tpd_unlocked_ioctl,
 128 };
 129 /*----------------------------------------------------------------------------*/
 130 static struct miscdevice tpd_misc_device =
 131 {
 132     .minor = MISC_DYNAMIC_MINOR,
 133     .name = "touch",
 134     .fops = &tpd_fops,
 135 };
 136
 137 //**********************************************
 138 //#endif
 139
 140
 141 /* function definitions */
 142 static int __init  tpd_device_init(void);
 143 static void __exit tpd_device_exit(void);
 144 static int         tpd_probe(struct platform_device *pdev);
 145 static int tpd_remove(struct platform_device *pdev);
 146
 147 extern void        tpd_suspend(struct early_suspend *h);
 148 extern void        tpd_resume(struct early_suspend *h);
 149 extern void tpd_button_init(void);
 150
 151 //int tpd_load_status = 0; //0: failed, 1: sucess
 152 int tpd_register_flag=0;
 153 /* global variable definitions */
 154 struct tpd_device  *tpd = 0;
 155 static struct tpd_driver_t tpd_driver_list[TP_DRV_MAX_COUNT] ;//= {0};
 156
 157 static struct platform_driver tpd_driver = {
 158     .remove     = tpd_remove,
 159     .shutdown   = NULL,
 160     .probe      = tpd_probe,
 161     #ifndef CONFIG_HAS_EARLYSUSPEND
 162     .suspend    = NULL,
 163     .resume     = NULL,
 164     #endif
 165     .driver     = {
 166         .name = TPD_DEVICE,
 167     },
 168 };
 169
 170 /*20091105, Kelvin, re-locate touch screen driver to earlysuspend*/
 171 #ifdef CONFIG_HAS_EARLYSUSPEND
 172 static struct early_suspend MTK_TS_early_suspend_handler =
 173 {
 174     .level = EARLY_SUSPEND_LEVEL_STOP_DRAWING-1,
 175     .suspend = NULL,
 176     .resume  = NULL,
 177 };
 178 #endif
 179
 180 static struct tpd_driver_t *g_tpd_drv = NULL;
 181 /* Add driver: if find TPD_TYPE_CAPACITIVE driver sucessfully, loading it */
 182 int tpd_driver_add(struct tpd_driver_t *tpd_drv)
 183 {
 184         int i;
 185
 186         if(g_tpd_drv != NULL)
 187         {
 188                 TPD_DMESG("touch driver exist \n");
 189                 return -1;
 190         }
 191         /* check parameter */
 192         if(tpd_drv == NULL)
 193         {
 194                 return -1;
 195         }
 196         /* R-touch */
 197         if(strcmp(tpd_drv->tpd_device_name, "generic") == 0)
 198         {
 199                         tpd_driver_list[0].tpd_device_name = tpd_drv->tpd_device_name;
 200                         tpd_driver_list[0].tpd_local_init = tpd_drv->tpd_local_init;
 201                         tpd_driver_list[0].suspend = tpd_drv->suspend;
 202                         tpd_driver_list[0].resume = tpd_drv->resume;
 203                         tpd_driver_list[0].tpd_have_button = tpd_drv->tpd_have_button;
 204                         return 0;
 205         }
 206         for(i = 1; i < TP_DRV_MAX_COUNT; i++)
 207         {
 208                 /* add tpd driver into list */
 209                 if(tpd_driver_list[i].tpd_device_name == NULL)
 210                 {
 211                         tpd_driver_list[i].tpd_device_name = tpd_drv->tpd_device_name;
 212                         tpd_driver_list[i].tpd_local_init = tpd_drv->tpd_local_init;
 213                         tpd_driver_list[i].suspend = tpd_drv->suspend;
 214                         tpd_driver_list[i].resume = tpd_drv->resume;
 215                         tpd_driver_list[i].tpd_have_button = tpd_drv->tpd_have_button;
 216                         tpd_driver_list[i].attrs = tpd_drv->attrs;
 217                         #if 0
 218                         if(tpd_drv->tpd_local_init()==0)
 219                         {
 220                                 TPD_DMESG("load %s sucessfully\n", tpd_driver_list[i].tpd_device_name);
 221                                 g_tpd_drv = &tpd_driver_list[i];
 222                         }
 223                         #endif
 224                         break;
 225                 }
 226                 if(strcmp(tpd_driver_list[i].tpd_device_name, tpd_drv->tpd_device_name) == 0)
 227                 {
 228                         return 1; // driver exist
 229                 }
 230         }
 231
 232         return 0;
 233 }
 234
 235 int tpd_driver_remove(struct tpd_driver_t *tpd_drv)
 236 {
 237         int i = 0;
 238         /* check parameter */
 239         if(tpd_drv == NULL)
 240         {
 241                 return -1;
 242         }
 243         for(i = 0; i < TP_DRV_MAX_COUNT; i++)
 244         {
 245                 /* find it */
 246                 if (strcmp(tpd_driver_list[i].tpd_device_name, tpd_drv->tpd_device_name) == 0)
 247                 {
 248                         memset(&tpd_driver_list[i], 0, sizeof(struct tpd_driver_t));
 249                         break;
 250                 }
 251         }
 252         return 0;
 253 }
 254
 255 static void tpd_create_attributes(struct device *dev, struct tpd_attrs *attrs)
 256 {
 257         int num = attrs->num;
 258
 259         for (; num>0;)
 260                 device_create_file(dev, attrs->attr[--num]);
 261 }
 262
 263 /* touch panel probe */
 264 static int tpd_probe(struct platform_device *pdev) {
 265                 int  touch_type = 1; // 0:R-touch, 1: Cap-touch
 266                 int i=0;
 267           TPD_DMESG("enter %s, %d\n", __FUNCTION__, __LINE__);
 268           /* Select R-Touch */
 269          // if(g_tpd_drv == NULL||tpd_load_status == 0)
 270 #if 0
 271          if(g_tpd_drv == NULL)
 272           {
 273                 g_tpd_drv = &tpd_driver_list[0];
 274                 /* touch_type:0: r-touch, 1: C-touch */
 275                 touch_type = 0;
 276                 TPD_DMESG("Generic touch panel driver\n");
 277           }
 278
 279     #ifdef CONFIG_HAS_EARLYSUSPEND
 280     MTK_TS_early_suspend_handler.suspend = g_tpd_drv->suspend;
 281     MTK_TS_early_suspend_handler.resume = g_tpd_drv->resume;
 282     register_early_suspend(&MTK_TS_early_suspend_handler);
 283     #endif
 284     #endif
 285
 286     if (misc_register(&tpd_misc_device))
 287     {
 288         printk("mtk_tpd: tpd_misc_device register failed\n");
 289     }
 290
 291     if((tpd=(struct tpd_device*)kmalloc(sizeof(struct tpd_device), GFP_KERNEL))==NULL) return -ENOMEM;
 292     memset(tpd, 0, sizeof(struct tpd_device));
 293
 294     /* allocate input device */
 295     if((tpd->dev=input_allocate_device())==NULL) { kfree(tpd); return -ENOMEM; }
 296
 297   //TPD_RES_X = simple_strtoul(LCM_WIDTH, NULL, 0);
 298   //TPD_RES_Y = simple_strtoul(LCM_HEIGHT, NULL, 0);
 299   TPD_RES_X = DISP_GetScreenWidth();
 300     TPD_RES_Y = DISP_GetScreenHeight();
 301
 302
 303     printk("mtk_tpd: TPD_RES_X = %d, TPD_RES_Y = %d\n", TPD_RES_X, TPD_RES_Y);
 304
 305     tpd_mode = TPD_MODE_NORMAL;
 306     tpd_mode_axis = 0;
 307     tpd_mode_min = TPD_RES_Y/2;
 308     tpd_mode_max = TPD_RES_Y;
 309     tpd_mode_keypad_tolerance = TPD_RES_X*TPD_RES_X/1600;
 310     /* struct input_dev dev initialization and registration */
 311     tpd->dev->name = TPD_DEVICE;
 312     set_bit(EV_ABS, tpd->dev->evbit);
 313     set_bit(EV_KEY, tpd->dev->evbit);
 314     set_bit(ABS_X, tpd->dev->absbit);
 315     set_bit(ABS_Y, tpd->dev->absbit);
 316     set_bit(ABS_PRESSURE, tpd->dev->absbit);
 317     set_bit(BTN_TOUCH, tpd->dev->keybit);
 318     set_bit(INPUT_PROP_DIRECT, tpd->dev->propbit);
 319 #if 1
 320   for(i = 1; i < TP_DRV_MAX_COUNT; i++)
 321         {
 322                 /* add tpd driver into list */
 323                 if(tpd_driver_list[i].tpd_device_name != NULL)
 324                 {
 325                         tpd_driver_list[i].tpd_local_init();
 326                         //msleep(1);
 327                         if(tpd_load_status ==1) {
 328                                 TPD_DMESG("[mtk-tpd]tpd_probe, tpd_driver_name=%s\n", tpd_driver_list[i].tpd_device_name);
 329                                 g_tpd_drv = &tpd_driver_list[i];
 330                                 break;
 331                         }
 332                 }
 333   }
 334          if(g_tpd_drv == NULL) {
 335                 if(tpd_driver_list[0].tpd_device_name != NULL) {
 336                 g_tpd_drv = &tpd_driver_list[0];
 337                 /* touch_type:0: r-touch, 1: C-touch */
 338                 touch_type = 0;
 339                 g_tpd_drv->tpd_local_init();
 340                 TPD_DMESG("[mtk-tpd]Generic touch panel driver\n");
 341           } else {
 342                 TPD_DMESG("[mtk-tpd]cap touch and Generic touch both are not loaded!!\n");
 343                 return 0;
 344                 }
 345           }
 346     #ifdef CONFIG_HAS_EARLYSUSPEND
 347     MTK_TS_early_suspend_handler.suspend = g_tpd_drv->suspend;
 348     MTK_TS_early_suspend_handler.resume = g_tpd_drv->resume;
 349     register_early_suspend(&MTK_TS_early_suspend_handler);
 350     #endif
 351 #endif
 352 //#ifdef TPD_TYPE_CAPACITIVE
 353                 /* TPD_TYPE_CAPACITIVE handle */
 354                 if(touch_type == 1){
 355
 356                 set_bit(ABS_MT_TRACKING_ID, tpd->dev->absbit);
 357         set_bit(ABS_MT_TOUCH_MAJOR, tpd->dev->absbit);
 358         set_bit(ABS_MT_TOUCH_MINOR, tpd->dev->absbit);
 359         set_bit(ABS_MT_POSITION_X, tpd->dev->absbit);
 360         set_bit(ABS_MT_POSITION_Y, tpd->dev->absbit);
 361         #if 0 // linux kernel update from 2.6.35 --> 3.0
 362         tpd->dev->absmax[ABS_MT_POSITION_X] = TPD_RES_X;
 363         tpd->dev->absmin[ABS_MT_POSITION_X] = 0;
 364         tpd->dev->absmax[ABS_MT_POSITION_Y] = TPD_RES_Y;
 365         tpd->dev->absmin[ABS_MT_POSITION_Y] = 0;
 366         tpd->dev->absmax[ABS_MT_TOUCH_MAJOR] = 100;
 367         tpd->dev->absmin[ABS_MT_TOUCH_MINOR] = 0;
 368 #else
 369                 input_set_abs_params(tpd->dev, ABS_MT_POSITION_X, 0, TPD_RES_X, 0, 0);
 370                 input_set_abs_params(tpd->dev, ABS_MT_POSITION_Y, 0, TPD_RES_Y, 0, 0);
 371                 input_set_abs_params(tpd->dev, ABS_MT_TOUCH_MAJOR, 0, 100, 0, 0);
 372                 input_set_abs_params(tpd->dev, ABS_MT_TOUCH_MINOR, 0, 100, 0, 0);
 373 #endif
 374         TPD_DMESG("Cap touch panel driver\n");
 375         }
 376 //#endif
 377     #if 0 //linux kernel update from 2.6.35 --> 3.0
 378     tpd->dev->absmax[ABS_X] = TPD_RES_X;
 379     tpd->dev->absmin[ABS_X] = 0;
 380     tpd->dev->absmax[ABS_Y] = TPD_RES_Y;
 381     tpd->dev->absmin[ABS_Y] = 0;
 382
 383     tpd->dev->absmax[ABS_PRESSURE] = 255;
 384     tpd->dev->absmin[ABS_PRESSURE] = 0;
 385     #else
 386                 input_set_abs_params(tpd->dev, ABS_X, 0, TPD_RES_X, 0, 0);
 387                 input_set_abs_params(tpd->dev, ABS_Y, 0, TPD_RES_Y, 0, 0);
 388                 input_abs_set_res(tpd->dev, ABS_X, TPD_RES_X);
 389                 input_abs_set_res(tpd->dev, ABS_Y, TPD_RES_Y);
 390                 input_set_abs_params(tpd->dev, ABS_PRESSURE, 0, 255, 0, 0);
 391
 392     #endif
 393     if(input_register_device(tpd->dev))
 394         TPD_DMESG("input_register_device failed.(tpd)\n");
 395     else
 396                         tpd_register_flag = 1;
 397     /* init R-Touch */
 398     #if 0
 399           if(touch_type == 0)
 400           {
 401                 g_tpd_drv->tpd_local_init();
 402           }
 403                 #endif
 404     if(g_tpd_drv->tpd_have_button)
 405     {
 406         tpd_button_init();
 407     }
 408
 409         if (g_tpd_drv->attrs.num)
 410                 tpd_create_attributes(&pdev->dev, &g_tpd_drv->attrs);
 411
 412     return 0;
 413 }
 414
 415 static int tpd_remove(struct platform_device *pdev)
 416 {
 417            input_unregister_device(tpd->dev);
 418     #ifdef CONFIG_HAS_EARLYSUSPEND
 419     unregister_early_suspend(&MTK_TS_early_suspend_handler);
 420     #endif
 421     return 0;
 422 }
 423
 424 /* called when loaded into kernel */
 425 static int __init tpd_device_init(void) {
 426     printk("MediaTek touch panel driver init\n");
 427     if(platform_driver_register(&tpd_driver)!=0) {
 428         TPD_DMESG("unable to register touch panel driver.\n");
 429         return -1;
 430     }
 431     return 0;
 432 }
 433
 434 /* should never be called */
 435 static void __exit tpd_device_exit(void) {
 436     TPD_DMESG("MediaTek touch panel driver exit\n");
 437     //input_unregister_device(tpd->dev);
 438     platform_driver_unregister(&tpd_driver);
 439     #ifdef CONFIG_HAS_EARLYSUSPEND
 440     unregister_early_suspend(&MTK_TS_early_suspend_handler);
 441     #endif
 442 }
 443
 444 module_init(tpd_device_init);
 445 module_exit(tpd_device_exit);
 446
 447 MODULE_LICENSE("GPL");
 448 MODULE_DESCRIPTION("MediaTek touch panel driver");
 449 MODULE_AUTHOR("Kirby Wu<kirby.wu@mediatek.com>");
 450