drivers/input/touchscreen/ili2102_ts.c

   1 #include <linux/module.h>
   2 #include <linux/delay.h>
   3 #include <linux/earlysuspend.h>
   4 #include <linux/hrtimer.h>
   5 #include <linux/i2c.h>
   6 #include <linux/input.h>
   7 #include <linux/interrupt.h>
   8 #include <linux/io.h>
   9 #include <linux/gpio.h>
  10 #include <linux/types.h>
  11 #include <mach/iomux.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/kthread.h>
  14 #include <linux/sched.h>
  15 #include <linux/irq.h>
  16 #include <linux/cdev.h>
  17 #include <asm/uaccess.h>
  18 #include <linux/proc_fs.h>
  19
  20 #include "ili2102_ts.h"
  21
  22 static int  ts_dbg_enable = 0;
  23
  24 #define DBG(msg...) \
  25         ({if(ts_dbg_enable == 1) printk(msg);})
  26
  27 #define TOUCH_NUMBER 2
  28
  29 static volatile int touch_state[TOUCH_NUMBER] = {TOUCH_UP,TOUCH_UP};
  30 static volatile unsigned int g_x[TOUCH_NUMBER] =  {0},g_y[TOUCH_NUMBER] = {0};
  31
  32 struct ili2102_ts_data {
  33         u16             model;                  /* 801. */
  34         bool    swap_xy;                /* swap x and y axes */
  35         u16             x_min, x_max;
  36         u16             y_min, y_max;
  37         uint16_t addr;
  38         int     use_irq;
  39         int     pendown;
  40         int     gpio_pendown;
  41         int     gpio_reset;
  42         int     gpio_reset_active_low;
  43         int             pendown_iomux_mode;
  44         int             resetpin_iomux_mode;
  45         char    pendown_iomux_name[IOMUX_NAME_SIZE];
  46         char    resetpin_iomux_name[IOMUX_NAME_SIZE];
  47         char    phys[32];
  48         char    name[32];
  49         int             valid_i2c_register;
  50         struct  i2c_client *client;
  51         struct  input_dev *input_dev;
  52         struct  hrtimer timer;
  53         struct  delayed_work    work;
  54         struct  workqueue_struct *ts_wq;
  55         struct  early_suspend early_suspend;
  56 };
  57
  58 #ifdef CONFIG_HAS_EARLYSUSPEND
  59 static void ili2102_ts_early_suspend(struct early_suspend *h);
  60 static void ili2102_ts_late_resume(struct early_suspend *h);
  61 #endif
  62
  63 #define ILI2102_TS_APK_SUPPORT 1
  64
  65 #if ILI2102_TS_APK_SUPPORT
  66 // device data
  67 struct dev_data {
  68         // device number
  69         dev_t devno;
  70         // character device
  71         struct cdev cdev;
  72         // class device
  73         struct class *class;
  74 };
  75
  76 // global variables
  77 static struct ili2102_ts_data *g_ts;
  78 static struct dev_data g_dev;
  79
  80 // definitions
  81 #define ILITEK_I2C_RETRY_COUNT                  3
  82 #define ILITEK_FILE_DRIVER_NAME                 "ilitek_file"
  83 #define ILITEK_DEBUG_LEVEL                      KERN_INFO
  84 #define ILITEK_ERROR_LEVEL                      KERN_ALERT
  85
  86 // i2c command for ilitek touch screen
  87 #define ILITEK_TP_CMD_READ_DATA                 0x10
  88 #define ILITEK_TP_CMD_READ_SUB_DATA             0x11
  89 #define ILITEK_TP_CMD_GET_RESOLUTION            0x20
  90 #define ILITEK_TP_CMD_GET_FIRMWARE_VERSION      0x40
  91 #define ILITEK_TP_CMD_GET_PROTOCOL_VERSION      0x42
  92 #define ILITEK_TP_CMD_CALIBRATION               0xCC
  93 #define ILITEK_TP_CMD_ERASE_BACKGROUND          0xCE
  94
  95 // define the application command
  96 #define ILITEK_IOCTL_BASE                       100
  97 #define ILITEK_IOCTL_I2C_WRITE_DATA             _IOWR(ILITEK_IOCTL_BASE, 0, unsigned char*)
  98 #define ILITEK_IOCTL_I2C_WRITE_LENGTH           _IOWR(ILITEK_IOCTL_BASE, 1, int)
  99 #define ILITEK_IOCTL_I2C_READ_DATA              _IOWR(ILITEK_IOCTL_BASE, 2, unsigned char*)
 100 #define ILITEK_IOCTL_I2C_READ_LENGTH            _IOWR(ILITEK_IOCTL_BASE, 3, int)
 101 #define ILITEK_IOCTL_USB_WRITE_DATA             _IOWR(ILITEK_IOCTL_BASE, 4, unsigned char*)
 102 #define ILITEK_IOCTL_USB_WRITE_LENGTH           _IOWR(ILITEK_IOCTL_BASE, 5, int)
 103 #define ILITEK_IOCTL_USB_READ_DATA              _IOWR(ILITEK_IOCTL_BASE, 6, unsigned char*)
 104 #define ILITEK_IOCTL_USB_READ_LENGTH            _IOWR(ILITEK_IOCTL_BASE, 7, int)
 105 #define ILITEK_IOCTL_I2C_UPDATE_RESOLUTION      _IOWR(ILITEK_IOCTL_BASE, 8, int)
 106 #define ILITEK_IOCTL_USB_UPDATE_RESOLUTION      _IOWR(ILITEK_IOCTL_BASE, 9, int)
 107 #define ILITEK_IOCTL_I2C_SET_ADDRESS            _IOWR(ILITEK_IOCTL_BASE, 10, int)
 108 #define ILITEK_IOCTL_I2C_UPDATE                 _IOWR(ILITEK_IOCTL_BASE, 11, int)
 109 #define ILITEK_IOCTL_STOP_READ_DATA             _IOWR(ILITEK_IOCTL_BASE, 12, int)
 110 #define ILITEK_IOCTL_START_READ_DATA            _IOWR(ILITEK_IOCTL_BASE, 13, int)
 111
 112
 113 static ssize_t ili2102_proc_write(struct file *file, const char __user *buffer,
 114                            unsigned long count, void *data)
 115 {
 116         char c;
 117         int rc;
 118
 119         rc = get_user(c, buffer);
 120         if (rc)
 121                 return rc;
 122
 123         if (c == '1')
 124                 ts_dbg_enable = 1;
 125         else if (c == '0')
 126                 ts_dbg_enable = 0;
 127
 128         return count;
 129 }
 130
 131 static const struct file_operations ili2102_proc_fops = {
 132         .owner          = THIS_MODULE,
 133         .write          = ili2102_proc_write,
 134 };
 135
 136 static int ilitek_file_open(struct inode *inode, struct file *filp)
 137 {
 138         return 0;
 139 }
 140
 141 static ssize_t ilitek_file_write(struct file *filp, const char *buf, size_t count, loff_t *f_pos)
 142 {
 143         int ret;
 144         unsigned char buffer[128]={0};
 145         struct i2c_msg msg[2];
 146
 147         msg[0].addr = g_ts->client->addr;
 148         msg[0].flags = g_ts->client->flags;
 149         msg[0].len = count;
 150         msg[0].buf = buffer;
 151         msg[0].scl_rate = 400*1000;
 152         msg[0].udelay = 80;
 153
 154         printk("%s:count=0x%x\n",__FUNCTION__,count);
 155
 156         // before sending data to touch device, we need to check whether the device is working or not
 157         if(g_ts->valid_i2c_register == 0){
 158                 printk(ILITEK_ERROR_LEVEL "%s, i2c device driver doesn't be registered\n", __func__);
 159                 return -1;
 160         }
 161
 162         // check the buffer size whether it exceeds the local buffer size or not
 163         if(count > 128){
 164                 printk(ILITEK_ERROR_LEVEL "%s, buffer exceed 128 bytes\n", __func__);
 165                 return -1;
 166         }
 167
 168         // copy data from user space
 169         ret = copy_from_user(buffer, buf, count-1);
 170         if(ret < 0){
 171                 printk(ILITEK_ERROR_LEVEL "%s, copy data from user space, failed", __func__);
 172                 return -1;
 173         }
 174
 175         // parsing command
 176         if(strcmp(buffer, "calibrate") == 0){
 177                 buffer[0] = ILITEK_TP_CMD_ERASE_BACKGROUND;
 178         msg[0].len = 1;
 179         ret = i2c_transfer(g_ts->client->adapter, msg, 1);
 180         if(ret < 0){
 181                 printk(ILITEK_DEBUG_LEVEL "%s, i2c erase background, failed\n", __func__);
 182         }
 183         else{
 184                 printk(ILITEK_DEBUG_LEVEL "%s, i2c erase background, success\n", __func__);
 185         }
 186
 187                 buffer[0] = ILITEK_TP_CMD_CALIBRATION;
 188         msg[0].len = 1;
 189         msleep(2000);
 190         ret = i2c_transfer(g_ts->client->adapter, msg, 1);
 191                 if(ret < 0){
 192         printk(ILITEK_DEBUG_LEVEL "%s, i2c calibration, failed\n", __func__);
 193         }
 194                 else{
 195         printk(ILITEK_DEBUG_LEVEL "%s, i2c calibration, success\n", __func__);
 196                 }
 197                 msleep(1000);
 198                 return count;
 199         }
 200         return -1;
 201 }
 202
 203
 204 static int ilitek_file_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, unsigned long arg)
 205 {
 206         static unsigned char buffer[64]={0};
 207         static int len=0;
 208         int ret;
 209         struct i2c_msg msg[2];
 210
 211         msg[0].addr = g_ts->client->addr;
 212         msg[0].flags = g_ts->client->flags;
 213         msg[0].len = len;
 214         msg[0].buf = buffer;
 215         msg[0].scl_rate = 400*1000;
 216         msg[0].udelay = 80;
 217
 218         // parsing ioctl command
 219         switch(cmd){
 220         case ILITEK_IOCTL_I2C_WRITE_DATA:
 221                 ret = copy_from_user(buffer, (unsigned char*)arg, len);
 222                 if(ret < 0){
 223         printk(ILITEK_ERROR_LEVEL "%s, copy data from user space, failed\n", __func__);
 224         return -1;
 225         }
 226                 ret = i2c_transfer(g_ts->client->adapter, msg, 1);
 227                 if(ret < 0){
 228                 printk(ILITEK_ERROR_LEVEL "%s, i2c write, failed\n", __func__);
 229                 return -1;
 230                 }
 231                 break;
 232
 233         case ILITEK_IOCTL_I2C_READ_DATA:
 234                 msg[0].addr = g_ts->client->addr;
 235                 msg[0].flags = g_ts->client->flags | I2C_M_RD;
 236                 msg[0].len = len;
 237                 msg[0].buf = buffer;
 238                 msg[0].scl_rate = 400*1000;
 239                 msg[0].udelay = 80;
 240                 ret = i2c_transfer(g_ts->client->adapter, msg, 1);
 241                 if(ret < 0){
 242         printk(ILITEK_ERROR_LEVEL "%s, i2c read, failed\n", __func__);
 243                 return -1;
 244         }
 245                 ret = copy_to_user((unsigned char*)arg, buffer, len);
 246                 if(ret < 0){
 247         printk(ILITEK_ERROR_LEVEL "%s, copy data to user space, failed\n", __func__);
 248         return -1;
 249         }
 250                 break;
 251         case ILITEK_IOCTL_I2C_WRITE_LENGTH:
 252         case ILITEK_IOCTL_I2C_READ_LENGTH:
 253                 len = arg;
 254                 break;
 255         case ILITEK_IOCTL_I2C_UPDATE_RESOLUTION:
 256         case ILITEK_IOCTL_I2C_SET_ADDRESS:
 257         case ILITEK_IOCTL_I2C_UPDATE:
 258                 break;
 259         case ILITEK_IOCTL_START_READ_DATA:
 260                 //g_ts.stop_polling = 0;
 261                 break;
 262         case ILITEK_IOCTL_STOP_READ_DATA:
 263                 //g_ts.stop_polling = 1;
 264                 break;
 265         default:
 266                 return -1;
 267         }
 268
 269         printk("%s:cmd=0x%x\n",__FUNCTION__,cmd);
 270
 271         return 0;
 272 }
 273
 274
 275 static ssize_t ilitek_file_read(struct file *filp, char *buf, size_t count, loff_t *f_pos)
 276 {
 277         return 0;
 278 }
 279
 280
 281 static int ilitek_file_close(struct inode *inode, struct file *filp)
 282 {
 283         return 0;
 284 }
 285
 286
 287 // declare file operations
 288 struct file_operations ilitek_fops = {
 289         .ioctl = ilitek_file_ioctl,
 290         .read = ilitek_file_read,
 291         .write = ilitek_file_write,
 292         .open = ilitek_file_open,
 293         .release = ilitek_file_close,
 294 };
 295
 296 #endif
 297 static int verify_coord(struct ili2102_ts_data *ts,unsigned int *x,unsigned int *y)
 298 {
 299
 300         //DBG("%s:(%d/%d)\n",__FUNCTION__,*x, *y);
 301         if((*x< ts->x_min) || (*x > ts->x_max))
 302                 return -1;
 303
 304         if((*y< ts->y_min) || (*y > ts->y_max))
 305                 return -1;
 306
 307         return 0;
 308 }
 309 static int ili2102_init_panel(struct ili2102_ts_data *ts)
 310 {
 311         gpio_set_value(ts->gpio_reset, ts->gpio_reset_active_low? GPIO_LOW:GPIO_HIGH);
 312         mdelay(1);
 313         gpio_set_value(ts->gpio_reset, ts->gpio_reset_active_low? GPIO_HIGH:GPIO_LOW);
 314         return 0;
 315 }
 316
 317 static void ili2102_ts_work_func(struct work_struct *work)
 318 {
 319         int i,ret,num=1;
 320         int syn_flag = 0;
 321         unsigned int x, y;
 322         struct i2c_msg msg[2];
 323         uint8_t start_reg;
 324         uint8_t buf[9];//uint32_t buf[4];
 325         struct ili2102_ts_data *ts = container_of(work, struct ili2102_ts_data, work);
 326
 327         DBG("ili2102_ts_work_func\n");
 328
 329         /*Touch Information Report*/
 330         start_reg = 0x10;
 331
 332         msg[0].addr = ts->client->addr;
 333         msg[0].flags = ts->client->flags;
 334         msg[0].len = 1;
 335         msg[0].buf = &start_reg;
 336         msg[0].scl_rate = 400*1000;
 337         msg[0].udelay = 250;
 338
 339         msg[1].addr = ts->client->addr;
 340         msg[1].flags = ts->client->flags | I2C_M_RD;
 341         msg[1].len = 9;
 342         msg[1].buf = buf;
 343         msg[1].scl_rate = 400*1000;
 344         msg[1].udelay = 0;
 345
 346         ret = i2c_transfer(ts->client->adapter, msg, 2);
 347         if (ret < 0)
 348         {
 349                 printk("%s:i2c_transfer fail, ret=%d\n",__FUNCTION__,ret);
 350                 goto out;
 351         }
 352         if(buf[0]&0x02 == 0x02)
 353                 num = 2;
 354         else
 355                 num = 1;
 356
 357         for(i=0; i<num; i++)
 358         {
 359
 360                 if(!((buf[0]>>i)&0x01))
 361                 {
 362                         if (touch_state[i] == TOUCH_DOWN)
 363                         {
 364                                 DBG("ili2102_ts_work_func:buf[%d]=%d\n",i,buf[i]);
 365                                 input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0); //Finger Size
 366                                 input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0); //Touch Size
 367                                 input_mt_sync(ts->input_dev);
 368                                 syn_flag = 1;
 369                                 touch_state[i] = TOUCH_UP;
 370                                 DBG("i=%d,touch_up \n",i);
 371                         }
 372
 373                 }
 374                 else
 375                 {
 376                         if((buf[0]>>i)&0x01)
 377                         {
 378                                 x = buf[1+(i<<2)] | (buf[2+(i<<2)] << 8);
 379                                 y = buf[3+(i<<2)] | (buf[4+(i<<2)] << 8);
 380
 381                                 if (ts->swap_xy)
 382                                 swap(x, y);
 383
 384                                 if (verify_coord(ts,&x,&y))//goto out;
 385                                 {
 386                                         printk("err:x=%d,y=%d\n",x,y);
 387                                         x = g_x[i];
 388                                         y = g_y[i];
 389                                 }
 390
 391                                 g_x[i] = x;
 392                                 g_y[i] = y;
 393                                 input_event(ts->input_dev, EV_ABS, ABS_MT_TRACKING_ID, i);
 394                         input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, 1); //Finger Size
 395                         input_report_abs(ts->input_dev, ABS_MT_POSITION_X, x);
 396                         input_report_abs(ts->input_dev, ABS_MT_POSITION_Y, y);
 397                         input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, 5); //Touch Size
 398                         input_mt_sync(ts->input_dev);
 399                                 syn_flag = 1;
 400                                 touch_state[i] = TOUCH_DOWN;
 401                                  ts->pendown = 1;
 402                                 DBG("touch_down i=%d X = %d, Y = %d\n",i, x, y);
 403                         }
 404
 405                 }
 406         }
 407
 408         if(syn_flag)
 409         input_sync(ts->input_dev);
 410 out:
 411 #if 1
 412         if(ts->pendown)
 413         {
 414                 schedule_delayed_work(&ts->work, msecs_to_jiffies(12));
 415                 ts->pendown = 0;
 416         }
 417         else
 418         {
 419                 if (ts->use_irq)
 420                 enable_irq(ts->client->irq);
 421         }
 422 #else
 423         enable_irq(ts->client->irq);//intterupt pin will be high after i2c read so could enable irq at once
 424 #endif
 425         DBG("pin=%d,level=%d,irq=%d\n\n",irq_to_gpio(ts->client->irq),gpio_get_value(irq_to_gpio(ts->client->irq)),ts->client->irq);
 426
 427 }
 428
 429 static irqreturn_t ili2102_ts_irq_handler(int irq, void *dev_id)
 430 {
 431         struct ili2102_ts_data *ts = dev_id;
 432         DBG("ili2102_ts_irq_handler=%d,%d\n",ts->client->irq,ts->use_irq);
 433
 434         disable_irq_nosync(ts->client->irq); //disable_irq(ts->client->irq);
 435         queue_delayed_work(ts->ts_wq, &ts->work, 0);
 436         return IRQ_HANDLED;
 437 }
 438
 439 static int __devinit setup_resetPin(struct i2c_client *client, struct ili2102_ts_data *ts)
 440 {
 441         struct ili2102_platform_data    *pdata = client->dev.platform_data;
 442         int err;
 443
 444         ts->gpio_reset = pdata->gpio_reset;
 445         strcpy(ts->resetpin_iomux_name,pdata->resetpin_iomux_name);
 446         ts->resetpin_iomux_mode = pdata->resetpin_iomux_mode;
 447         ts->gpio_reset_active_low = pdata->gpio_reset_active_low;
 448
 449         DBG("%s=%d,%s,%d,%d\n",__FUNCTION__,ts->gpio_reset,ts->resetpin_iomux_name,ts->resetpin_iomux_mode,ts->gpio_reset_active_low);
 450
 451         if (!gpio_is_valid(ts->gpio_reset)) {
 452                 dev_err(&client->dev, "no gpio_reset?\n");
 453                 return -EINVAL;
 454         }
 455
 456         rk29_mux_api_set(ts->resetpin_iomux_name,ts->resetpin_iomux_mode);
 457         err = gpio_request(ts->gpio_reset, "ili2102_resetPin");
 458         if (err) {
 459                 dev_err(&client->dev, "failed to request resetPin GPIO%d\n",
 460                                 ts->gpio_reset);
 461                 return err;
 462         }
 463
 464         //gpio_direction_output(ts->gpio_reset, ts->gpio_reset_active_low? GPIO_HIGH:GPIO_LOW);
 465
 466         err = gpio_direction_output(ts->gpio_reset, ts->gpio_reset_active_low? GPIO_LOW:GPIO_HIGH);
 467         if (err) {
 468                 dev_err(&client->dev, "failed to set resetPin GPIO%d\n",
 469                                 ts->gpio_reset);
 470                 gpio_free(ts->gpio_reset);
 471                 return err;
 472         }
 473
 474         mdelay(5);
 475
 476         gpio_set_value(ts->gpio_reset, ts->gpio_reset_active_low? GPIO_HIGH:GPIO_LOW);
 477
 478         mdelay(200);
 479
 480         return 0;
 481 }
 482
 483 static int __devinit setup_pendown(struct i2c_client *client, struct ili2102_ts_data *ts)
 484 {
 485         int err;
 486         struct ili2102_platform_data    *pdata = client->dev.platform_data;
 487
 488         if (!client->irq) {
 489                 dev_dbg(&client->dev, "no IRQ?\n");
 490                 return -ENODEV;
 491         }
 492
 493         if (!gpio_is_valid(pdata->gpio_pendown)) {
 494                 dev_err(&client->dev, "no gpio_pendown?\n");
 495                 return -EINVAL;
 496         }
 497
 498         ts->gpio_pendown = pdata->gpio_pendown;
 499         strcpy(ts->pendown_iomux_name,pdata->pendown_iomux_name);
 500         ts->pendown_iomux_mode = pdata->pendown_iomux_mode;
 501
 502         DBG("%s=%d,%s,%d\n",__FUNCTION__,ts->gpio_pendown,ts->pendown_iomux_name,ts->pendown_iomux_mode);
 503
 504         if (!gpio_is_valid(ts->gpio_pendown)) {
 505                 dev_err(&client->dev, "no gpio_pendown?\n");
 506                 return -EINVAL;
 507         }
 508
 509         rk29_mux_api_set(ts->pendown_iomux_name,ts->pendown_iomux_mode);
 510         err = gpio_request(ts->gpio_pendown, "ili2102_pendown");
 511         if (err) {
 512                 dev_err(&client->dev, "failed to request pendown GPIO%d\n",
 513                                 ts->gpio_pendown);
 514                 return err;
 515         }
 516
 517         err = gpio_pull_updown(ts->gpio_pendown, PullDisable);
 518         if (err) {
 519                 dev_err(&client->dev, "failed to pullup pendown GPIO%d\n",
 520                                 ts->gpio_pendown);
 521                 gpio_free(ts->gpio_pendown);
 522                 return err;
 523         }
 524         return 0;
 525 }
 526
 527 static int ili2102_chip_Init(struct i2c_client *client)
 528 {
 529         int ret = 0;
 530         uint8_t start_reg;
 531         uint8_t buf[6];
 532         struct i2c_msg msg[2];
 533
 534         /* get panel information:6bytes */
 535         start_reg = 0x20;
 536         msg[0].addr =client->addr;
 537         msg[0].flags = client->flags;
 538         msg[0].len = 1;
 539         msg[0].buf = &start_reg;
 540         msg[0].scl_rate = 400*1000;
 541         msg[0].udelay = 200;
 542
 543         ret = i2c_transfer(client->adapter, msg, 1);
 544         if (ret < 0) {
 545         printk("%s:err\n",__FUNCTION__);
 546         }
 547
 548         mdelay(5);//tp need delay
 549
 550         msg[0].addr = client->addr;
 551         msg[0].flags = client->flags |I2C_M_RD;
 552         msg[0].len = 6;
 553         msg[0].buf = (u8*)&buf[0];
 554         msg[0].scl_rate = 400*1000;
 555         msg[0].udelay = 200;
 556
 557         ret = i2c_transfer(client->adapter, msg, 1);
 558         if (ret < 0) {
 559         printk("%s:err\n",__FUNCTION__);
 560         }
 561
 562         printk("%s:max_x=%d,max_y=%d,b[4]=0x%x,b[5]=0x%x\n",
 563                 __FUNCTION__,buf[0]|(buf[1]<<8),buf[2]|(buf[3]<<8),buf[4],buf[5]);
 564
 565         /*get firmware version:3bytes */
 566         start_reg = 0x40;
 567         msg[0].addr =client->addr;
 568         msg[0].flags = client->flags;
 569         msg[0].len = 1;
 570         msg[0].buf = &start_reg;
 571         msg[0].scl_rate = 400*1000;
 572         msg[0].udelay = 200;
 573
 574         ret = i2c_transfer(client->adapter, msg, 1);
 575         if (ret < 0) {
 576         printk("%s:err\n",__FUNCTION__);
 577         }
 578
 579         mdelay(5);//tp need delay
 580
 581         msg[0].addr = client->addr;
 582         msg[0].flags = client->flags | I2C_M_RD;
 583         msg[0].len = 3;
 584         msg[0].buf = (u8*)&buf[0];
 585         msg[0].scl_rate =400*1000;
 586         msg[0].udelay = 200;
 587
 588         ret = i2c_transfer(client->adapter, msg, 1);
 589         if (ret < 0) {
 590         printk("%s:err\n",__FUNCTION__);
 591         }
 592
 593         printk("%s:Ver %d.%d.%d\n",__FUNCTION__,buf[0],buf[1],buf[2]);
 594
 595         return ret;
 596
 597 }
 598
 599 static int ili2102_ts_probe(struct i2c_client *client, const struct i2c_device_id *id)
 600 {
 601         struct ili2102_ts_data *ts;
 602         struct ili2102_platform_data    *pdata = client->dev.platform_data;
 603         int ret = 0;
 604
 605         printk("ili2102 TS probe\n");
 606
 607         if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 608             printk(KERN_ERR "ili2102_ts_probe: need I2C_FUNC_I2C\n");
 609             ret = -ENODEV;
 610             goto err_check_functionality_failed;
 611         }
 612
 613         ts = kzalloc(sizeof(*ts), GFP_KERNEL);
 614         if (ts == NULL) {
 615             ret = -ENOMEM;
 616             goto err_alloc_data_failed;
 617         }
 618
 619         ts->ts_wq = create_singlethread_workqueue("ts_wq");
 620         if (!ts->ts_wq)
 621         {
 622                 printk("%s:fail to create ts_wq,ret=0x%x\n",__FUNCTION__, ENOMEM);
 623                 return -ENOMEM;
 624         }
 625         //INIT_WORK(&ts->work, ili2102_ts_work_func);
 626         INIT_DELAYED_WORK(&ts->work, ili2102_ts_work_func);
 627         ts->client = client;
 628         i2c_set_clientdata(client, ts);
 629
 630         ret = setup_resetPin(client,ts);
 631         if(ret)
 632         {
 633                  printk("ili2102 TS setup_resetPin fail\n");
 634                  goto err_alloc_data_failed;
 635         }
 636
 637         ret=ili2102_chip_Init(ts->client);
 638         if(ret<0)
 639         {
 640                 printk("%s:chips init failed\n",__FUNCTION__);
 641                 goto err_resetpin_failed;
 642         }
 643
 644         /* allocate input device */
 645         ts->input_dev = input_allocate_device();
 646         if (ts->input_dev == NULL) {
 647             ret = -ENOMEM;
 648             printk(KERN_ERR "ili2102_ts_probe: Failed to allocate input device\n");
 649             goto err_input_dev_alloc_failed;
 650         }
 651
 652         ts->model = pdata->model ? : 801;
 653         ts->swap_xy = pdata->swap_xy;
 654         ts->x_min = pdata->x_min;
 655         ts->x_max = pdata->x_max;
 656         ts->y_min = pdata->y_min;
 657         ts->y_max = pdata->y_max;
 658         snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(&client->dev));
 659         snprintf(ts->name, sizeof(ts->name), "ili%d-touchscreen", ts->model);
 660         ts->input_dev->phys = ts->phys;
 661         ts->input_dev->name = ts->name;
 662         ts->input_dev->dev.parent = &client->dev;
 663         ts->pendown = 0;
 664         ts->valid_i2c_register = 1;
 665
 666         ts->input_dev->evbit[0] = BIT_MASK(EV_SYN) | BIT_MASK(EV_ABS);
 667         //ts->input_dev->absbit[0] =
 668                 //BIT(ABS_MT_POSITION_X) | BIT(ABS_MT_POSITION_Y) |
 669                 //BIT(ABS_MT_TOUCH_MAJOR) | BIT(ABS_MT_WIDTH_MAJOR);  // for android
 670         input_set_abs_params(ts->input_dev, ABS_MT_POSITION_X,
 671                     ts->x_min ? : 0,
 672                         ts->x_max ? : 480,
 673                         0, 0);
 674         input_set_abs_params(ts->input_dev, ABS_MT_POSITION_Y,
 675                         ts->y_min ? : 0,
 676                         ts->y_max ? : 800,
 677                         0, 0);
 678         input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 1, 0, 0); //Finger Size
 679         input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 10, 0, 0); //Touch Size
 680
 681         /* ts->input_dev->name = ts->keypad_info->name; */
 682         ret = input_register_device(ts->input_dev);
 683         if (ret) {
 684             printk(KERN_ERR "ili2102_ts_probe: Unable to register %s input device\n", ts->input_dev->name);
 685             goto err_input_register_device_failed;
 686         }
 687
 688         client->irq = gpio_to_irq(client->irq);
 689         if (client->irq)
 690         {
 691                 ret = setup_pendown(client,ts);
 692                 if(ret)
 693                 {
 694                          printk("ili2102 TS setup_pendown fail\n");
 695                          goto err_input_register_device_failed;
 696                 }
 697
 698         ret = request_irq(client->irq, ili2102_ts_irq_handler, IRQF_DISABLED | IRQF_TRIGGER_LOW, client->name, ts);
 699         if (ret == 0) {
 700             DBG("ili2102 TS register ISR (irq=%d)\n", client->irq);
 701             ts->use_irq = 1;
 702         }
 703         else
 704                 dev_err(&client->dev, "request_irq failed\n");
 705     }
 706
 707 #if ILI2102_TS_APK_SUPPORT
 708         // initialize global variable
 709         g_ts = ts;
 710         memset(&g_dev, 0, sizeof(struct dev_data));
 711
 712         // allocate character device driver buffer
 713         ret = alloc_chrdev_region(&g_dev.devno, 0, 1, ILITEK_FILE_DRIVER_NAME);
 714         if(ret){
 715                 printk(ILITEK_ERROR_LEVEL "%s, can't allocate chrdev\n", __func__);
 716                 return ret;
 717         }
 718         printk(ILITEK_DEBUG_LEVEL "%s, register chrdev(%d, %d)\n", __func__, MAJOR(g_dev.devno), MINOR(g_dev.devno));
 719
 720         // initialize character device driver
 721         cdev_init(&g_dev.cdev, &ilitek_fops);
 722         g_dev.cdev.owner = THIS_MODULE;
 723         ret = cdev_add(&g_dev.cdev, g_dev.devno, 1);
 724         if(ret < 0){
 725                 printk(ILITEK_ERROR_LEVEL "%s, add character device error, ret %d\n", __func__, ret);
 726                 return ret;
 727         }
 728         g_dev.class = class_create(THIS_MODULE, ILITEK_FILE_DRIVER_NAME);
 729         if(IS_ERR(g_dev.class)){
 730                 printk(ILITEK_ERROR_LEVEL "%s, create class, error\n", __func__);
 731                 return ret;
 732         }
 733         device_create(g_dev.class, NULL, g_dev.devno, NULL, "ilitek_ctrl");
 734 #endif
 735
 736 #ifdef CONFIG_HAS_EARLYSUSPEND
 737         ts->early_suspend.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN + 1;
 738         ts->early_suspend.suspend = ili2102_ts_early_suspend;
 739         ts->early_suspend.resume = ili2102_ts_late_resume;
 740         register_early_suspend(&ts->early_suspend);
 741 #endif
 742
 743         struct proc_dir_entry *ili2102_proc_entry;
 744         ili2102_proc_entry = proc_create("driver/ili2102", 0777, NULL, &ili2102_proc_fops);
 745
 746         printk(KERN_INFO "ili2102_ts_probe: Start touchscreen %s in %s mode\n", ts->input_dev->name, ts->use_irq ? "interrupt" : "polling");
 747
 748         return 0;
 749
 750         err_input_register_device_failed:
 751         input_free_device(ts->input_dev);
 752         err_resetpin_failed:
 753         gpio_free(ts->gpio_reset);
 754         err_input_dev_alloc_failed:
 755         kfree(ts);
 756         err_alloc_data_failed:
 757         err_check_functionality_failed:
 758         return ret;
 759 }
 760
 761 static int ili2102_ts_remove(struct i2c_client *client)
 762 {
 763         struct ili2102_ts_data *ts = i2c_get_clientdata(client);
 764         unregister_early_suspend(&ts->early_suspend);
 765         if (ts->use_irq)
 766         free_irq(client->irq, ts);
 767         else
 768         hrtimer_cancel(&ts->timer);
 769         input_unregister_device(ts->input_dev);
 770         if (ts->ts_wq)
 771         cancel_delayed_work_sync(&ts->work);
 772         kfree(ts);
 773
 774 #if ILI2102_TS_APK_SUPPORT
 775         // delete character device driver
 776         cdev_del(&g_dev.cdev);
 777         unregister_chrdev_region(g_dev.devno, 1);
 778         device_destroy(g_dev.class, g_dev.devno);
 779         class_destroy(g_dev.class);
 780 #endif
 781
 782         return 0;
 783 }
 784
 785 static int ili2102_ts_suspend(struct i2c_client *client, pm_message_t mesg)
 786 {
 787         int ret;
 788         struct ili2102_ts_data *ts = i2c_get_clientdata(client);
 789         uint8_t buf[1] = {0x30};
 790         struct i2c_msg msg[1];
 791
 792         //to do suspend
 793         msg[0].addr =client->addr;
 794         msg[0].flags = 0;
 795         msg[0].len = 1;
 796         msg[0].buf = buf;
 797
 798         ret = i2c_transfer(client->adapter, msg, 1);
 799         if (ret < 0) {
 800         printk("%s:err\n",__FUNCTION__);
 801         }
 802
 803         ret = cancel_delayed_work_sync(&ts->work);
 804         if (ret && ts->use_irq) /* if work was pending disable-count is now 2 */
 805         enable_irq(client->irq);
 806
 807         if (ts->use_irq)
 808         {
 809                 free_irq(client->irq, ts);
 810                 //change irq type to IRQF_TRIGGER_FALLING to avoid system death
 811                 ret = request_irq(client->irq, ili2102_ts_irq_handler, IRQF_DISABLED | IRQF_TRIGGER_FALLING, client->name, ts);
 812             if (ret == 0) {
 813                 disable_irq_nosync(client->irq);
 814                 ts->use_irq = 1;
 815             }
 816             else
 817                 printk("%s:request irq=%d failed,ret=%d\n",__FUNCTION__, ts->client->irq, ret);
 818         }
 819         else
 820         hrtimer_cancel(&ts->timer);
 821
 822         DBG("%s\n",__FUNCTION__);
 823
 824         return 0;
 825 }
 826
 827
 828 static void ili2102_ts_resume_work_func(struct work_struct *work)
 829 {
 830         struct ili2102_ts_data *ts = container_of(work, struct ili2102_ts_data, work);
 831         int ret;
 832
 833         //report touch up to android
 834         input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0); //Finger Size
 835         input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0); //Touch Size
 836         input_mt_sync(ts->input_dev);
 837         input_sync(ts->input_dev);
 838
 839         PREPARE_DELAYED_WORK(&ts->work, ili2102_ts_work_func);
 840         mdelay(100); //wait for 100ms before i2c operation
 841
 842         free_irq(ts->client->irq, ts);
 843         ret = request_irq(ts->client->irq, ili2102_ts_irq_handler, IRQF_DISABLED | IRQF_TRIGGER_LOW, ts->client->name, ts);
 844         if (ret == 0) {
 845         ts->use_irq = 1;
 846         //enable_irq(ts->client->irq);
 847         }
 848         else
 849         printk("%s:request irq=%d failed,ret=%d\n",__FUNCTION__,ts->client->irq,ret);
 850
 851         DBG("%s,irq=%d\n",__FUNCTION__,ts->client->irq);
 852 }
 853
 854
 855 static int ili2102_ts_resume(struct i2c_client *client)
 856 {
 857     struct ili2102_ts_data *ts = i2c_get_clientdata(client);
 858
 859     ili2102_init_panel(ts);
 860
 861     if (ts->use_irq) {
 862         if(!delayed_work_pending(&ts->work)){
 863                 PREPARE_DELAYED_WORK(&ts->work, ili2102_ts_resume_work_func);
 864                 queue_delayed_work(ts->ts_wq, &ts->work, 0);
 865         }
 866     }
 867     else {
 868         hrtimer_start(&ts->timer, ktime_set(1, 0), HRTIMER_MODE_REL);
 869     }
 870
 871         DBG("%s\n",__FUNCTION__);
 872
 873     return 0;
 874 }
 875
 876
 877 #ifdef CONFIG_HAS_EARLYSUSPEND
 878 static void ili2102_ts_early_suspend(struct early_suspend *h)
 879 {
 880     struct ili2102_ts_data *ts;
 881     ts = container_of(h, struct ili2102_ts_data, early_suspend);
 882     ili2102_ts_suspend(ts->client, PMSG_SUSPEND);
 883 }
 884
 885 static void ili2102_ts_late_resume(struct early_suspend *h)
 886 {
 887     struct ili2102_ts_data *ts;
 888     ts = container_of(h, struct ili2102_ts_data, early_suspend);
 889     ili2102_ts_resume(ts->client);
 890 }
 891 #endif
 892
 893 #define ILI2102_TS_NAME "ili2102_ts"
 894
 895 static const struct i2c_device_id ili2102_ts_id[] = {
 896     { ILI2102_TS_NAME, 0 },
 897     { }
 898 };
 899
 900 static struct i2c_driver ili2102_ts_driver = {
 901     .probe      = ili2102_ts_probe,
 902     .remove     = ili2102_ts_remove,
 903 #ifndef CONFIG_HAS_EARLYSUSPEND
 904     .suspend    = ili2102_ts_early_suspend,
 905     .resume     = ili2102_ts_late_resume,
 906 #endif
 907     .id_table   = ili2102_ts_id,
 908     .driver = {
 909         .name   = ILI2102_TS_NAME,
 910     },
 911 };
 912
 913 static int __devinit ili2102_ts_init(void)
 914 {
 915     return i2c_add_driver(&ili2102_ts_driver);
 916 }
 917
 918 static void __exit ili2102_ts_exit(void)
 919 {
 920         i2c_del_driver(&ili2102_ts_driver);
 921 }
 922
 923 module_init(ili2102_ts_init);
 924 module_exit(ili2102_ts_exit);
 925
 926 MODULE_DESCRIPTION("ili2102 Touchscreen Driver");
 927 MODULE_LICENSE("GPL");