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 #include <linux/input/mt.h>
  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         DBG("%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 long ilitek_file_ioctl (struct file *filp, unsigned int cmd, unsigned long arg)
 206
 207 {
 208         static unsigned char buffer[64]={0};
 209         static int len=0;
 210         int ret;
 211         struct i2c_msg msg[2];
 212
 213         msg[0].addr = g_ts->client->addr;
 214         msg[0].flags = g_ts->client->flags;
 215         msg[0].len = len;
 216         msg[0].buf = buffer;
 217         msg[0].scl_rate = 400*1000;
 218         msg[0].udelay = 80;
 219
 220         // parsing ioctl command
 221         switch(cmd){
 222         case ILITEK_IOCTL_I2C_WRITE_DATA:
 223                 ret = copy_from_user(buffer, (unsigned char*)arg, len);
 224                 if(ret < 0){
 225         printk(ILITEK_ERROR_LEVEL "%s, copy data from user space, failed\n", __func__);
 226         return -1;
 227         }
 228                 ret = i2c_transfer(g_ts->client->adapter, msg, 1);
 229                 if(ret < 0){
 230                 printk(ILITEK_ERROR_LEVEL "%s, i2c write, failed\n", __func__);
 231                 return -1;
 232                 }
 233                 break;
 234
 235         case ILITEK_IOCTL_I2C_READ_DATA:
 236                 msg[0].addr = g_ts->client->addr;
 237                 msg[0].flags = g_ts->client->flags | I2C_M_RD;
 238                 msg[0].len = len;
 239                 msg[0].buf = buffer;
 240                 msg[0].scl_rate = 400*1000;
 241                 msg[0].udelay = 80;
 242                 ret = i2c_transfer(g_ts->client->adapter, msg, 1);
 243                 if(ret < 0){
 244         printk(ILITEK_ERROR_LEVEL "%s, i2c read, failed\n", __func__);
 245                 return -1;
 246         }
 247                 ret = copy_to_user((unsigned char*)arg, buffer, len);
 248                 if(ret < 0){
 249         printk(ILITEK_ERROR_LEVEL "%s, copy data to user space, failed\n", __func__);
 250         return -1;
 251         }
 252                 break;
 253         case ILITEK_IOCTL_I2C_WRITE_LENGTH:
 254         case ILITEK_IOCTL_I2C_READ_LENGTH:
 255                 len = arg;
 256                 break;
 257         case ILITEK_IOCTL_I2C_UPDATE_RESOLUTION:
 258         case ILITEK_IOCTL_I2C_SET_ADDRESS:
 259         case ILITEK_IOCTL_I2C_UPDATE:
 260                 break;
 261         case ILITEK_IOCTL_START_READ_DATA:
 262                 //g_ts.stop_polling = 0;
 263                 break;
 264         case ILITEK_IOCTL_STOP_READ_DATA:
 265                 //g_ts.stop_polling = 1;
 266                 break;
 267         default:
 268                 return -1;
 269         }
 270
 271         DBG("%s:cmd=0x%x\n",__FUNCTION__,cmd);
 272
 273         return 0;
 274 }
 275
 276
 277 static ssize_t ilitek_file_read(struct file *filp, char *buf, size_t count, loff_t *f_pos)
 278 {
 279         return 0;
 280 }
 281
 282
 283 static int ilitek_file_close(struct inode *inode, struct file *filp)
 284 {
 285         return 0;
 286 }
 287
 288
 289 // declare file operations
 290 struct file_operations ilitek_fops = {
 291         .unlocked_ioctl = ilitek_file_ioctl,
 292         .read = ilitek_file_read,
 293         .write = ilitek_file_write,
 294         .open = ilitek_file_open,
 295         .release = ilitek_file_close,
 296 };
 297
 298 #endif
 299 static int verify_coord(struct ili2102_ts_data *ts,unsigned int *x,unsigned int *y)
 300 {
 301
 302         //DBG("%s:(%d/%d)\n",__FUNCTION__,*x, *y);
 303         #ifndef CONFIG_MACH_RK29_TD8801_V2
 304         if((*x< ts->x_min) || (*x > ts->x_max))
 305                 return -1;
 306
 307         if((*y< ts->y_min) || (*y > ts->y_max))
 308                 return -1;
 309     #endif
 310
 311         /*android do not support min and max value*/
 312         if(*x == ts->x_min)
 313                 *x = ts->x_min + 1;
 314         if(*y == ts->y_min)
 315                 *y = ts->y_min + 1;
 316         if(*x == ts->x_max)
 317                 *x = ts->x_max - 1;
 318         if(*y == ts->y_max)
 319                 *y = ts->y_max - 1;
 320
 321
 322         return 0;
 323 }
 324 static int ili2102_init_panel(struct ili2102_ts_data *ts)
 325 {
 326         gpio_set_value(ts->gpio_reset, ts->gpio_reset_active_low? GPIO_LOW:GPIO_HIGH);
 327         mdelay(1);
 328         gpio_set_value(ts->gpio_reset, ts->gpio_reset_active_low? GPIO_HIGH:GPIO_LOW);
 329         return 0;
 330 }
 331
 332 static void ili2102_ts_work_func(struct work_struct *work)
 333 {
 334         int i,ret,num=1;
 335         int syn_flag = 0;
 336         unsigned int x, y;
 337         struct i2c_msg msg[2];
 338         uint8_t start_reg;
 339         uint8_t buf[9];//uint32_t buf[4];
 340         struct ili2102_ts_data *ts = container_of(work, struct ili2102_ts_data, work);
 341
 342         DBG("ili2102_ts_work_func\n");
 343
 344         /*Touch Information Report*/
 345         start_reg = 0x10;
 346
 347         msg[0].addr = ts->client->addr;
 348         msg[0].flags = ts->client->flags;
 349         msg[0].len = 1;
 350         msg[0].buf = &start_reg;
 351         msg[0].scl_rate = 200*1000;
 352         msg[0].udelay = 200;
 353
 354         msg[1].addr = ts->client->addr;
 355         msg[1].flags = ts->client->flags | I2C_M_RD;
 356         msg[1].len = 9;
 357         msg[1].buf = buf;
 358         msg[1].scl_rate = 200*1000;
 359         msg[1].udelay = 0;
 360
 361         ret = i2c_transfer(ts->client->adapter, msg, 2);
 362         if (ret < 0)
 363         {
 364                 printk("%s:i2c_transfer fail, ret=%d\n",__FUNCTION__,ret);
 365                 goto out;
 366         }
 367
 368         for(i=0; i<TOUCH_NUMBER; i++)
 369         {
 370
 371                 if(!((buf[0]>>i)&0x01))
 372                 {
 373                         if (touch_state[i] == TOUCH_DOWN)
 374                         {
 375                                 DBG("ili2102_ts_work_func:buf[%d]=%d\n",i,buf[i]);
 376                                 //input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0);
 377                                 //input_report_abs(ts->input_dev, ABS_MT_PRESSURE, 0);
 378                                 input_mt_slot(ts->input_dev, i);
 379                                 input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, false);
 380                                 syn_flag = 1;
 381                                 touch_state[i] = TOUCH_UP;
 382                                 DBG("i=%d,touch_up \n",i);
 383                         }
 384
 385                 }
 386                 else
 387                 {
 388                         if((buf[0]>>i)&0x01)
 389                         {
 390                                 x = buf[1+(i<<2)] | (buf[2+(i<<2)] << 8);
 391                                 y = buf[3+(i<<2)] | (buf[4+(i<<2)] << 8);
 392
 393                                 if (ts->swap_xy)
 394                                 swap(x, y);
 395
 396                                 if (verify_coord(ts,&x,&y))//goto out;
 397                                 {
 398                                         printk("err:x=%d,y=%d\n",x,y);
 399                                         x = g_x[i];
 400                                         y = g_y[i];
 401                                 }
 402                                 g_x[i] = x;
 403                                 g_y[i] = y;
 404
 405                                 input_mt_slot(ts->input_dev, i);
 406                                 input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true);
 407                                 input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, 1);
 408                                 //input_report_abs(ts->input_dev, ABS_MT_PRESSURE, 100);
 409                                 input_report_abs(ts->input_dev, ABS_MT_POSITION_X, x);
 410                                 input_report_abs(ts->input_dev, ABS_MT_POSITION_Y, y);
 411
 412                                 syn_flag = 1;
 413                                 touch_state[i] = TOUCH_DOWN;
 414                                  ts->pendown = 1;
 415                                 DBG("touch_down i=%d X = %d, Y = %d\n",i, x, y);
 416                         }
 417
 418                 }
 419         }
 420
 421         if(syn_flag)
 422         input_sync(ts->input_dev);
 423 out:
 424 #if 0
 425         if(ts->pendown)
 426         {
 427                 schedule_delayed_work(&ts->work, msecs_to_jiffies(12));
 428                 ts->pendown = 0;
 429         }
 430         else
 431         {
 432                 if (ts->use_irq)
 433                 enable_irq(ts->client->irq);
 434         }
 435 #else
 436         enable_irq(ts->client->irq);//intterupt pin will be high after i2c read so could enable irq at once
 437 #endif
 438         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);
 439
 440 }
 441
 442 static irqreturn_t ili2102_ts_irq_handler(int irq, void *dev_id)
 443 {
 444         struct ili2102_ts_data *ts = dev_id;
 445         DBG("ili2102_ts_irq_handler=%d,%d\n",ts->client->irq,ts->use_irq);
 446
 447         disable_irq_nosync(ts->client->irq); //disable_irq(ts->client->irq);
 448         queue_delayed_work(ts->ts_wq, &ts->work, 0);
 449         return IRQ_HANDLED;
 450 }
 451
 452 static int __devinit setup_resetPin(struct i2c_client *client, struct ili2102_ts_data *ts)
 453 {
 454         struct ili2102_platform_data    *pdata = client->dev.platform_data;
 455         int err;
 456
 457         ts->gpio_reset = pdata->gpio_reset;
 458         strcpy(ts->resetpin_iomux_name,pdata->resetpin_iomux_name);
 459         ts->resetpin_iomux_mode = pdata->resetpin_iomux_mode;
 460         ts->gpio_reset_active_low = pdata->gpio_reset_active_low;
 461
 462         DBG("%s=%d,%s,%d,%d\n",__FUNCTION__,ts->gpio_reset,ts->resetpin_iomux_name,ts->resetpin_iomux_mode,ts->gpio_reset_active_low);
 463
 464         if (!gpio_is_valid(ts->gpio_reset)) {
 465                 dev_err(&client->dev, "no gpio_reset?\n");
 466                 return -EINVAL;
 467         }
 468
 469         rk29_mux_api_set(ts->resetpin_iomux_name,ts->resetpin_iomux_mode);
 470         err = gpio_request(ts->gpio_reset, "ili2102_resetPin");
 471         if (err) {
 472                 dev_err(&client->dev, "failed to request resetPin GPIO%d\n",
 473                                 ts->gpio_reset);
 474                 return err;
 475         }
 476
 477         //gpio_direction_output(ts->gpio_reset, ts->gpio_reset_active_low? GPIO_HIGH:GPIO_LOW);
 478
 479         err = gpio_direction_output(ts->gpio_reset, ts->gpio_reset_active_low? GPIO_LOW:GPIO_HIGH);
 480         if (err) {
 481                 dev_err(&client->dev, "failed to set resetPin GPIO%d\n",
 482                                 ts->gpio_reset);
 483                 gpio_free(ts->gpio_reset);
 484                 return err;
 485         }
 486
 487         mdelay(5);
 488
 489         gpio_set_value(ts->gpio_reset, ts->gpio_reset_active_low? GPIO_HIGH:GPIO_LOW);
 490
 491         mdelay(200);
 492
 493         return 0;
 494 }
 495
 496 static int __devinit setup_pendown(struct i2c_client *client, struct ili2102_ts_data *ts)
 497 {
 498         int err;
 499         struct ili2102_platform_data    *pdata = client->dev.platform_data;
 500
 501         if (!client->irq) {
 502                 dev_dbg(&client->dev, "no IRQ?\n");
 503                 return -ENODEV;
 504         }
 505
 506         if (!gpio_is_valid(pdata->gpio_pendown)) {
 507                 dev_err(&client->dev, "no gpio_pendown?\n");
 508                 return -EINVAL;
 509         }
 510
 511         ts->gpio_pendown = pdata->gpio_pendown;
 512         strcpy(ts->pendown_iomux_name,pdata->pendown_iomux_name);
 513         ts->pendown_iomux_mode = pdata->pendown_iomux_mode;
 514
 515         DBG("%s=%d,%s,%d\n",__FUNCTION__,ts->gpio_pendown,ts->pendown_iomux_name,ts->pendown_iomux_mode);
 516
 517         if (!gpio_is_valid(ts->gpio_pendown)) {
 518                 dev_err(&client->dev, "no gpio_pendown?\n");
 519                 return -EINVAL;
 520         }
 521
 522         rk29_mux_api_set(ts->pendown_iomux_name,ts->pendown_iomux_mode);
 523         err = gpio_request(ts->gpio_pendown, "ili2102_pendown");
 524         if (err) {
 525                 dev_err(&client->dev, "failed to request pendown GPIO%d\n",
 526                                 ts->gpio_pendown);
 527                 return err;
 528         }
 529
 530         err = gpio_pull_updown(ts->gpio_pendown, PullDisable);
 531         if (err) {
 532                 dev_err(&client->dev, "failed to pullup pendown GPIO%d\n",
 533                                 ts->gpio_pendown);
 534                 gpio_free(ts->gpio_pendown);
 535                 return err;
 536         }
 537         return 0;
 538 }
 539
 540 static int ili2102_chip_Init(struct i2c_client *client)
 541 {
 542         int ret = 0;
 543         uint8_t start_reg;
 544         uint8_t buf[6];
 545         struct i2c_msg msg[2];
 546
 547         /* get panel information:6bytes */
 548         start_reg = 0x20;
 549         msg[0].addr =client->addr;
 550         msg[0].flags = client->flags;
 551         msg[0].len = 1;
 552         msg[0].buf = &start_reg;
 553         msg[0].scl_rate = 400*1000;
 554         msg[0].udelay = 200;
 555
 556         ret = i2c_transfer(client->adapter, msg, 1);
 557         if (ret < 0) {
 558         printk("%s:err\n",__FUNCTION__);
 559         }
 560
 561         mdelay(5);//tp need delay
 562
 563         msg[0].addr = client->addr;
 564         msg[0].flags = client->flags |I2C_M_RD;
 565         msg[0].len = 6;
 566         msg[0].buf = (u8*)&buf[0];
 567         msg[0].scl_rate = 400*1000;
 568         msg[0].udelay = 200;
 569
 570         ret = i2c_transfer(client->adapter, msg, 1);
 571         if (ret < 0) {
 572         printk("%s:err\n",__FUNCTION__);
 573         }
 574
 575         printk("%s:max_x=%d,max_y=%d,b[4]=0x%x,b[5]=0x%x\n",
 576                 __FUNCTION__,buf[0]|(buf[1]<<8),buf[2]|(buf[3]<<8),buf[4],buf[5]);
 577
 578         /*get firmware version:3bytes */
 579         start_reg = 0x40;
 580         msg[0].addr =client->addr;
 581         msg[0].flags = client->flags;
 582         msg[0].len = 1;
 583         msg[0].buf = &start_reg;
 584         msg[0].scl_rate = 400*1000;
 585         msg[0].udelay = 200;
 586
 587         ret = i2c_transfer(client->adapter, msg, 1);
 588         if (ret < 0) {
 589         printk("%s:err\n",__FUNCTION__);
 590         }
 591
 592         mdelay(5);//tp need delay
 593
 594         msg[0].addr = client->addr;
 595         msg[0].flags = client->flags | I2C_M_RD;
 596         msg[0].len = 3;
 597         msg[0].buf = (u8*)&buf[0];
 598         msg[0].scl_rate =400*1000;
 599         msg[0].udelay = 200;
 600
 601         ret = i2c_transfer(client->adapter, msg, 1);
 602         if (ret < 0) {
 603         printk("%s:err\n",__FUNCTION__);
 604         }
 605
 606         printk("%s:Ver %d.%d.%d\n",__FUNCTION__,buf[0],buf[1],buf[2]);
 607
 608         return ret;
 609
 610 }
 611
 612 static int ili2102_ts_probe(struct i2c_client *client, const struct i2c_device_id *id)
 613 {
 614         struct ili2102_ts_data *ts;
 615         struct ili2102_platform_data    *pdata = client->dev.platform_data;
 616         int ret = 0;
 617
 618         printk("ili2102 TS probe\n");
 619
 620         if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 621             printk(KERN_ERR "ili2102_ts_probe: need I2C_FUNC_I2C\n");
 622             ret = -ENODEV;
 623             goto err_check_functionality_failed;
 624         }
 625
 626         ts = kzalloc(sizeof(*ts), GFP_KERNEL);
 627         if (ts == NULL) {
 628             ret = -ENOMEM;
 629             goto err_alloc_data_failed;
 630         }
 631
 632         ts->ts_wq = create_singlethread_workqueue("ts_wq");
 633         if (!ts->ts_wq)
 634         {
 635                 printk("%s:fail to create ts_wq,ret=0x%x\n",__FUNCTION__, ENOMEM);
 636                 return -ENOMEM;
 637         }
 638         //INIT_WORK(&ts->work, ili2102_ts_work_func);
 639         INIT_DELAYED_WORK(&ts->work, ili2102_ts_work_func);
 640         ts->client = client;
 641         i2c_set_clientdata(client, ts);
 642
 643         ret = setup_resetPin(client,ts);
 644         if(ret)
 645         {
 646                  printk("ili2102 TS setup_resetPin fail\n");
 647                  goto err_alloc_data_failed;
 648         }
 649
 650         ret=ili2102_chip_Init(ts->client);
 651         if(ret<0)
 652         {
 653                 printk("%s:chips init failed\n",__FUNCTION__);
 654                 goto err_resetpin_failed;
 655         }
 656
 657         /* allocate input device */
 658         ts->input_dev = input_allocate_device();
 659         if (ts->input_dev == NULL) {
 660             ret = -ENOMEM;
 661             printk(KERN_ERR "ili2102_ts_probe: Failed to allocate input device\n");
 662             goto err_input_dev_alloc_failed;
 663         }
 664
 665         ts->model = pdata->model ? : 801;
 666         ts->swap_xy = pdata->swap_xy;
 667         ts->x_min = pdata->x_min;
 668         ts->x_max = pdata->x_max;
 669         ts->y_min = pdata->y_min;
 670         ts->y_max = pdata->y_max;
 671         snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(&client->dev));
 672         snprintf(ts->name, sizeof(ts->name), "ili%d-touchscreen", ts->model);
 673         ts->input_dev->phys = ts->phys;
 674         ts->input_dev->name = ts->name;
 675         ts->input_dev->dev.parent = &client->dev;
 676         ts->pendown = 0;
 677         ts->valid_i2c_register = 1;
 678
 679         //ts->input_dev->evbit[0] = BIT_MASK(EV_SYN) | BIT_MASK(EV_ABS);
 680         //ts->input_dev->absbit[0] =
 681                 //BIT(ABS_MT_POSITION_X) | BIT(ABS_MT_POSITION_Y) |
 682                 //BIT(ABS_MT_TOUCH_MAJOR) | BIT(ABS_MT_WIDTH_MAJOR);  // for android
 683
 684         __set_bit(INPUT_PROP_DIRECT, ts->input_dev->propbit);
 685         __set_bit(EV_ABS, ts->input_dev->evbit);
 686
 687         input_set_abs_params(ts->input_dev, ABS_MT_POSITION_X,
 688                     ts->x_min ? : 0,
 689                         ts->x_max ? : 480,
 690                         0, 0);
 691         input_set_abs_params(ts->input_dev, ABS_MT_POSITION_Y,
 692                         ts->y_min ? : 0,
 693                         ts->y_max ? : 800,
 694                         0, 0);
 695         input_mt_init_slots(ts->input_dev, TOUCH_NUMBER);
 696         input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
 697         //input_set_abs_params(ts->input_dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
 698
 699         /* ts->input_dev->name = ts->keypad_info->name; */
 700         ret = input_register_device(ts->input_dev);
 701         if (ret) {
 702             printk(KERN_ERR "ili2102_ts_probe: Unable to register %s input device\n", ts->input_dev->name);
 703             goto err_input_register_device_failed;
 704         }
 705
 706         client->irq = gpio_to_irq(client->irq);
 707         if (client->irq)
 708         {
 709                 ret = setup_pendown(client,ts);
 710                 if(ret)
 711                 {
 712                          printk("ili2102 TS setup_pendown fail\n");
 713                          goto err_input_register_device_failed;
 714                 }
 715
 716         ret = request_irq(client->irq, ili2102_ts_irq_handler, IRQF_DISABLED | IRQF_TRIGGER_LOW, client->name, ts);
 717         if (ret == 0) {
 718             DBG("ili2102 TS register ISR (irq=%d)\n", client->irq);
 719             ts->use_irq = 1;
 720         }
 721         else
 722                 dev_err(&client->dev, "request_irq failed\n");
 723     }
 724
 725 #if ILI2102_TS_APK_SUPPORT
 726         // initialize global variable
 727         g_ts = ts;
 728         memset(&g_dev, 0, sizeof(struct dev_data));
 729
 730         // allocate character device driver buffer
 731         ret = alloc_chrdev_region(&g_dev.devno, 0, 1, ILITEK_FILE_DRIVER_NAME);
 732         if(ret){
 733                 printk(ILITEK_ERROR_LEVEL "%s, can't allocate chrdev\n", __func__);
 734                 return ret;
 735         }
 736         printk(ILITEK_DEBUG_LEVEL "%s, register chrdev(%d, %d)\n", __func__, MAJOR(g_dev.devno), MINOR(g_dev.devno));
 737
 738         // initialize character device driver
 739         cdev_init(&g_dev.cdev, &ilitek_fops);
 740         g_dev.cdev.owner = THIS_MODULE;
 741         ret = cdev_add(&g_dev.cdev, g_dev.devno, 1);
 742         if(ret < 0){
 743                 printk(ILITEK_ERROR_LEVEL "%s, add character device error, ret %d\n", __func__, ret);
 744                 return ret;
 745         }
 746         g_dev.class = class_create(THIS_MODULE, ILITEK_FILE_DRIVER_NAME);
 747         if(IS_ERR(g_dev.class)){
 748                 printk(ILITEK_ERROR_LEVEL "%s, create class, error\n", __func__);
 749                 return ret;
 750         }
 751         device_create(g_dev.class, NULL, g_dev.devno, NULL, "ilitek_ctrl");
 752 #endif
 753
 754 #ifdef CONFIG_HAS_EARLYSUSPEND
 755         ts->early_suspend.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN + 1;
 756         ts->early_suspend.suspend = ili2102_ts_early_suspend;
 757         ts->early_suspend.resume = ili2102_ts_late_resume;
 758         register_early_suspend(&ts->early_suspend);
 759 #endif
 760
 761         struct proc_dir_entry *ili2102_proc_entry;
 762         ili2102_proc_entry = proc_create("driver/ili2102", 0777, NULL, &ili2102_proc_fops);
 763
 764         printk(KERN_INFO "ili2102_ts_probe: Start touchscreen %s in %s mode\n", ts->input_dev->name, ts->use_irq ? "interrupt" : "polling");
 765
 766         return 0;
 767
 768         err_input_register_device_failed:
 769         input_free_device(ts->input_dev);
 770         err_resetpin_failed:
 771         gpio_free(ts->gpio_reset);
 772         err_input_dev_alloc_failed:
 773         kfree(ts);
 774         err_alloc_data_failed:
 775         err_check_functionality_failed:
 776         return ret;
 777 }
 778
 779 static int ili2102_ts_remove(struct i2c_client *client)
 780 {
 781         struct ili2102_ts_data *ts = i2c_get_clientdata(client);
 782         unregister_early_suspend(&ts->early_suspend);
 783         if (ts->use_irq)
 784         free_irq(client->irq, ts);
 785         else
 786         hrtimer_cancel(&ts->timer);
 787         input_unregister_device(ts->input_dev);
 788         if (ts->ts_wq)
 789         cancel_delayed_work_sync(&ts->work);
 790         kfree(ts);
 791
 792 #if ILI2102_TS_APK_SUPPORT
 793         // delete character device driver
 794         cdev_del(&g_dev.cdev);
 795         unregister_chrdev_region(g_dev.devno, 1);
 796         device_destroy(g_dev.class, g_dev.devno);
 797         class_destroy(g_dev.class);
 798 #endif
 799
 800         return 0;
 801 }
 802
 803 static int ili2102_ts_suspend(struct i2c_client *client, pm_message_t mesg)
 804 {
 805         int ret;
 806         struct ili2102_ts_data *ts = i2c_get_clientdata(client);
 807         uint8_t buf[1] = {0x30};
 808         struct i2c_msg msg[1];
 809
 810         //to do suspend
 811         msg[0].addr =client->addr;
 812         msg[0].flags = 0;
 813         msg[0].len = 1;
 814         msg[0].buf = buf;
 815
 816         ret = i2c_transfer(client->adapter, msg, 1);
 817         if (ret < 0) {
 818         printk("%s:err\n",__FUNCTION__);
 819         }
 820
 821         ret = cancel_delayed_work_sync(&ts->work);
 822         if (ret && ts->use_irq) /* if work was pending disable-count is now 2 */
 823         enable_irq(client->irq);
 824
 825         if (ts->use_irq)
 826         {
 827                 free_irq(client->irq, ts);
 828                 //change irq type to IRQF_TRIGGER_FALLING to avoid system death
 829                 ret = request_irq(client->irq, ili2102_ts_irq_handler, IRQF_DISABLED | IRQF_TRIGGER_FALLING, client->name, ts);
 830             if (ret == 0) {
 831                 disable_irq_nosync(client->irq);
 832                 ts->use_irq = 1;
 833             }
 834             else
 835                 printk("%s:request irq=%d failed,ret=%d\n",__FUNCTION__, ts->client->irq, ret);
 836         }
 837         else
 838         hrtimer_cancel(&ts->timer);
 839
 840         DBG("%s\n",__FUNCTION__);
 841
 842         return 0;
 843 }
 844
 845
 846 static void ili2102_ts_resume_work_func(struct work_struct *work)
 847 {
 848         struct ili2102_ts_data *ts = container_of(work, struct ili2102_ts_data, work);
 849         int ret,i;
 850
 851         PREPARE_DELAYED_WORK(&ts->work, ili2102_ts_work_func);
 852         mdelay(100); //wait for 100ms before i2c operation
 853
 854         free_irq(ts->client->irq, ts);
 855         ret = request_irq(ts->client->irq, ili2102_ts_irq_handler, IRQF_DISABLED | IRQF_TRIGGER_LOW, ts->client->name, ts);
 856         if (ret == 0) {
 857         ts->use_irq = 1;
 858         //enable_irq(ts->client->irq);
 859         }
 860         else
 861         printk("%s:request irq=%d failed,ret=%d\n",__FUNCTION__,ts->client->irq,ret);
 862
 863         DBG("%s,irq=%d\n",__FUNCTION__,ts->client->irq);
 864 }
 865
 866
 867 static int ili2102_ts_resume(struct i2c_client *client)
 868 {
 869     struct ili2102_ts_data *ts = i2c_get_clientdata(client);
 870
 871     ili2102_init_panel(ts);
 872
 873     if (ts->use_irq) {
 874         if(!delayed_work_pending(&ts->work)){
 875                 PREPARE_DELAYED_WORK(&ts->work, ili2102_ts_resume_work_func);
 876                 queue_delayed_work(ts->ts_wq, &ts->work, 0);
 877         }
 878     }
 879     else {
 880         hrtimer_start(&ts->timer, ktime_set(1, 0), HRTIMER_MODE_REL);
 881     }
 882
 883         DBG("%s\n",__FUNCTION__);
 884
 885     return 0;
 886 }
 887
 888
 889 #ifdef CONFIG_HAS_EARLYSUSPEND
 890 static void ili2102_ts_early_suspend(struct early_suspend *h)
 891 {
 892     struct ili2102_ts_data *ts;
 893     ts = container_of(h, struct ili2102_ts_data, early_suspend);
 894     ili2102_ts_suspend(ts->client, PMSG_SUSPEND);
 895 }
 896
 897 static void ili2102_ts_late_resume(struct early_suspend *h)
 898 {
 899     struct ili2102_ts_data *ts;
 900     ts = container_of(h, struct ili2102_ts_data, early_suspend);
 901     ili2102_ts_resume(ts->client);
 902 }
 903 #endif
 904
 905 #define ILI2102_TS_NAME "ili2102_ts"
 906
 907 static const struct i2c_device_id ili2102_ts_id[] = {
 908     { ILI2102_TS_NAME, 0 },
 909     { }
 910 };
 911
 912 static struct i2c_driver ili2102_ts_driver = {
 913     .probe      = ili2102_ts_probe,
 914     .remove     = ili2102_ts_remove,
 915 #ifndef CONFIG_HAS_EARLYSUSPEND
 916     .suspend    = ili2102_ts_early_suspend,
 917     .resume     = ili2102_ts_late_resume,
 918 #endif
 919     .id_table   = ili2102_ts_id,
 920     .driver = {
 921         .name   = ILI2102_TS_NAME,
 922     },
 923 };
 924
 925 static int __devinit ili2102_ts_init(void)
 926 {
 927     return i2c_add_driver(&ili2102_ts_driver);
 928 }
 929
 930 static void __exit ili2102_ts_exit(void)
 931 {
 932         i2c_del_driver(&ili2102_ts_driver);
 933 }
 934
 935 module_init(ili2102_ts_init);
 936 module_exit(ili2102_ts_exit);
 937
 938 MODULE_DESCRIPTION("ili2102 Touchscreen Driver");
 939 MODULE_LICENSE("GPL");