drivers/headset_observe/rk_headset.c

   1 /* arch/arm/mach-rockchip/rk28_headset.c
   2  *
   3  * Copyright (C) 2009 Rockchip Corporation.
   4  *
   5  * This software is licensed under the terms of the GNU General Public
   6  * License version 2, as published by the Free Software Foundation, and
   7  * may be copied, distributed, and modified under those terms.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  */
  15
  16 #include <linux/module.h>
  17 #include <linux/sysdev.h>
  18 #include <linux/device.h>
  19 #include <linux/fs.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/workqueue.h>
  22 #include <linux/irq.h>
  23 #include <linux/delay.h>
  24 #include <linux/types.h>
  25 #include <linux/input.h>
  26 #include <linux/platform_device.h>
  27 #include <linux/mutex.h>
  28 #include <linux/errno.h>
  29 #include <linux/err.h>
  30 #include <linux/hrtimer.h>
  31 #include <linux/switch.h>
  32 #include <linux/input.h>
  33 #include <linux/debugfs.h>
  34 #include <linux/wakelock.h>
  35 #include <asm/gpio.h>
  36 #include <asm/atomic.h>
  37 #include <asm/mach-types.h>
  38 #include "rk_headset.h"
  39 #include <linux/earlysuspend.h>
  40 #include <linux/gpio.h>
  41 #include <mach/board.h>
  42
  43 /* Debug */
  44 #if 1
  45 #define DBG(x...) printk(x)
  46 #else
  47 #define DBG(x...) do { } while (0)
  48 #endif
  49
  50 #define BIT_HEADSET             (1 << 0)
  51 #define BIT_HEADSET_NO_MIC      (1 << 1)
  52
  53 #define HEADSET 0
  54 #define HOOK 1
  55
  56 #define HEADSET_IN 1
  57 #define HEADSET_OUT 0
  58 #define HOOK_DOWN 0
  59 #define HOOK_UP 1
  60 #define enable 1
  61 #define disable 0
  62
  63 extern int wm8994_set_status(void);
  64
  65 /* headset private data */
  66 struct headset_priv {
  67         struct input_dev *input_dev;
  68         struct rk_headset_pdata *pdata;
  69         unsigned int headset_status:1;
  70         unsigned int hook_status:1;
  71         unsigned int isMic:1;
  72         unsigned int isHook_irq:1;
  73         int cur_headset_status;
  74
  75         unsigned int irq[2];
  76         unsigned int irq_type[2];
  77         struct delayed_work h_delayed_work[2];
  78         struct switch_dev sdev;
  79         struct mutex mutex_lock[2];
  80         struct timer_list headset_timer;
  81         unsigned char *keycodes;
  82 };
  83 static struct headset_priv *headset_info;
  84
  85 int Headset_isMic(void)
  86 {
  87         return headset_info->isMic;
  88 }
  89 EXPORT_SYMBOL_GPL(Headset_isMic);
  90
  91 static irqreturn_t headset_interrupt(int irq, void *dev_id)
  92 {
  93 //      DBG("---headset_interrupt---\n");
  94         schedule_delayed_work(&headset_info->h_delayed_work[HEADSET], msecs_to_jiffies(50));
  95         return IRQ_HANDLED;
  96 }
  97
  98 static irqreturn_t Hook_interrupt(int irq, void *dev_id)
  99 {
 100 //      DBG("---Hook_interrupt---\n");
 101 //      disable_irq_nosync(headset_info->irq[HOOK]);
 102         schedule_delayed_work(&headset_info->h_delayed_work[HOOK], msecs_to_jiffies(100));
 103         return IRQ_HANDLED;
 104 }
 105
 106 static int headset_change_irqtype(int type,unsigned int irq_type)
 107 {
 108         int ret = 0;
 109 //      DBG("--------%s----------\n",__FUNCTION__);
 110         free_irq(headset_info->irq[type],NULL);
 111
 112         switch(type)
 113         {
 114         case HOOK:
 115                 ret = request_irq(headset_info->irq[type], Hook_interrupt, irq_type, NULL, NULL);
 116                 break;
 117         case HEADSET:
 118                 ret = request_irq(headset_info->irq[type], headset_interrupt, irq_type, NULL, NULL);
 119                 break;
 120         default:
 121                 ret = -1;
 122                 break;
 123         }
 124
 125         if (ret<0)
 126         {
 127                 DBG("headset_change_irqtype: request irq failed\n");
 128         return ret;
 129         }
 130         return ret;
 131 }
 132
 133 static void headsetobserve_work(struct work_struct *work)
 134 {
 135         int i,level = 0;
 136         struct rk_headset_pdata *pdata = headset_info->pdata;
 137         static unsigned int old_status = 0;
 138 //      DBG("---headsetobserve_work---\n");
 139         mutex_lock(&headset_info->mutex_lock[HEADSET]);
 140
 141         for(i=0; i<3; i++)
 142         {
 143                 level = gpio_get_value(pdata->Headset_gpio);
 144                 if(level < 0)
 145                 {
 146                         printk("%s:get pin level again,pin=%d,i=%d\n",__FUNCTION__,pdata->Headset_gpio,i);
 147                         msleep(1);
 148                         continue;
 149                 }
 150                 else
 151                 break;
 152         }
 153         if(level < 0)
 154         {
 155                 printk("%s:get pin level  err!\n",__FUNCTION__);
 156                 goto RE_ERROR;
 157         }
 158
 159         old_status = headset_info->headset_status;
 160         switch(pdata->headset_in_type)
 161         {
 162         case HEADSET_IN_HIGH:
 163                 if(level > 0)
 164                         headset_info->headset_status = HEADSET_IN;
 165                 else if(level == 0)
 166                         headset_info->headset_status = HEADSET_OUT;
 167                 break;
 168         case HEADSET_IN_LOW:
 169                 if(level == 0)
 170                         headset_info->headset_status = HEADSET_IN;
 171                 else if(level > 0)
 172                         headset_info->headset_status = HEADSET_OUT;
 173                 break;
 174         default:
 175                 DBG("---- ERROR: on headset headset_in_type error -----\n");
 176                 break;
 177         }
 178         if(old_status == headset_info->headset_status)
 179         {
 180                 DBG("old_status == headset_info->headset_status\n");
 181                 goto RE_ERROR;
 182         }
 183
 184         switch(pdata->headset_in_type)
 185         {
 186         case HEADSET_IN_HIGH:
 187                 if(level > 0)
 188                 {//in--High level
 189                 //      DBG("--- HEADSET_IN_HIGH headset in HIGH---\n");
 190                 //      enable_irq(headset_info->irq[HOOK]);
 191                         headset_info->cur_headset_status = BIT_HEADSET;
 192                         headset_change_irqtype(HEADSET,IRQF_TRIGGER_FALLING);//
 193                         del_timer(&headset_info->headset_timer);//Start the timer, wait for switch to the headphone channel
 194                         headset_info->headset_timer.expires = jiffies + 500;
 195                         add_timer(&headset_info->headset_timer);
 196                 }
 197                 else if(level == 0)
 198                 {//out--Low level
 199                 //      DBG("---HEADSET_IN_HIGH headset out HIGH---\n");
 200                         if(headset_info->isHook_irq == enable)
 201                         {
 202                         //      DBG("disable_irq\n");
 203                                 headset_info->isHook_irq = disable;
 204                                 disable_irq(headset_info->irq[HOOK]);
 205                         }
 206                         headset_info->cur_headset_status = ~(BIT_HEADSET|BIT_HEADSET_NO_MIC);
 207                         headset_change_irqtype(HEADSET,IRQF_TRIGGER_RISING);//
 208                 }
 209                 break;
 210         case HEADSET_IN_LOW:
 211                 if(level == 0)
 212                 {//in--High level
 213                 //      DBG("---HEADSET_IN_LOW headset in LOW ---\n");
 214                         headset_info->cur_headset_status = BIT_HEADSET;
 215                         headset_change_irqtype(HEADSET,IRQF_TRIGGER_RISING);//
 216                         enable_irq(headset_info->irq[HOOK]);
 217                         del_timer(&headset_info->headset_timer);//Start the timer, wait for switch to the headphone channel
 218                         headset_info->headset_timer.expires = jiffies + 500;
 219                         add_timer(&headset_info->headset_timer);
 220                 }
 221                 else if(level > 0)
 222                 {//out--High level
 223                 //      DBG("---HEADSET_IN_LOW headset out LOW ---\n");
 224                         if(headset_info->isHook_irq == enable)
 225                         {
 226                         //      DBG("disable_irq\n");
 227                                 headset_info->isHook_irq = disable;
 228                                 disable_irq(headset_info->irq[HOOK]);
 229                         }
 230                         headset_info->cur_headset_status = ~(BIT_HEADSET|BIT_HEADSET_NO_MIC);
 231                         headset_change_irqtype(HEADSET,IRQF_TRIGGER_FALLING);//
 232                         disable_irq(headset_info->irq[HOOK]);
 233                 }
 234                 break;
 235         default:
 236                 DBG("---- ERROR: on headset headset_in_type error -----\n");
 237                 break;
 238         }
 239         rk28_send_wakeup_key();
 240         switch_set_state(&headset_info->sdev, headset_info->cur_headset_status);
 241         DBG("headset_info->cur_headset_status = %d\n",headset_info->cur_headset_status);
 242 RE_ERROR:
 243         mutex_unlock(&headset_info->mutex_lock[HEADSET]);
 244 }
 245
 246 static void Hook_work(struct work_struct *work)
 247 {
 248         int i,level = 0;
 249         struct rk_headset_pdata *pdata = headset_info->pdata;
 250         static unsigned int old_status = HOOK_UP;
 251
 252 //      DBG("---Hook_work---\n");
 253         mutex_lock(&headset_info->mutex_lock[HOOK]);
 254         if(headset_info->headset_status == HEADSET_OUT)
 255         {
 256                 DBG("Headset is out\n");
 257                 goto RE_ERROR;
 258         }
 259         #ifdef CONFIG_SND_SOC_WM8994
 260         if(wm8994_set_status() < 0)
 261         {
 262                 DBG("wm8994 is not set on heatset channel or suspend\n");
 263                 goto RE_ERROR;
 264         }
 265         #endif
 266         for(i=0; i<3; i++)
 267         {
 268                 level = gpio_get_value(pdata->Hook_gpio);
 269                 if(level < 0)
 270                 {
 271                         printk("%s:get pin level again,pin=%d,i=%d\n",__FUNCTION__,pdata->Hook_gpio,i);
 272                         msleep(1);
 273                         continue;
 274                 }
 275                 else
 276                 break;
 277         }
 278         if(level < 0)
 279         {
 280                 printk("%s:get pin level  err!\n",__FUNCTION__);
 281                 goto RE_ERROR;
 282         }
 283
 284         old_status = headset_info->hook_status;
 285         if(level == 0)
 286                 headset_info->hook_status = HOOK_UP;
 287         else if(level > 0)
 288                 headset_info->hook_status = HOOK_DOWN;
 289         if(old_status == headset_info->hook_status)
 290         {
 291                 DBG("old_status == headset_info->hook_status\n");
 292                 goto RE_ERROR;
 293         }
 294
 295         if(level == 0)
 296         {
 297                 DBG("---HOOK Down ---\n");
 298                 headset_change_irqtype(HOOK,IRQF_TRIGGER_RISING);//
 299                 input_report_key(headset_info->input_dev,pdata->hook_key_code,headset_info->hook_status);
 300                 input_sync(headset_info->input_dev);
 301         }
 302         else if(level > 0)
 303         {
 304                 DBG("---HOOK Up ---\n");
 305                 headset_change_irqtype(HOOK,IRQF_TRIGGER_FALLING);//
 306                 input_report_key(headset_info->input_dev,pdata->hook_key_code,headset_info->hook_status);
 307                 input_sync(headset_info->input_dev);
 308         }
 309 RE_ERROR:
 310         mutex_unlock(&headset_info->mutex_lock[HOOK]);
 311 }
 312
 313 static void headset_timer_callback(unsigned long arg)
 314 {
 315         struct headset_priv *headset = (struct headset_priv *)(arg);
 316         struct rk_headset_pdata *pdata = headset->pdata;
 317         int i,level = 0;
 318
 319         DBG("headset_timer_callback,headset->headset_status=%d\n",headset->headset_status);
 320
 321         if(headset->headset_status == HEADSET_OUT)
 322         {
 323                 DBG("Headset is out\n");
 324                 goto out;
 325         }
 326         #ifdef CONFIG_SND_SOC_WM8994
 327         if(wm8994_set_status() < 0)
 328         {
 329                 DBG("wm8994 is not set on heatset channel\n");
 330                 headset_info->headset_timer.expires = jiffies + 500;
 331                 add_timer(&headset_info->headset_timer);
 332                 goto out;
 333         }
 334         #endif
 335         for(i=0; i<3; i++)
 336         {
 337                 level = gpio_get_value(pdata->Hook_gpio);
 338                 if(level < 0)
 339                 {
 340                         printk("%s:get pin level again,pin=%d,i=%d\n",__FUNCTION__,pdata->Hook_gpio,i);
 341                         msleep(1);
 342                         continue;
 343                 }
 344                 else
 345                 break;
 346         }
 347         if(level < 0)
 348         {
 349                 printk("%s:get pin level  err!\n",__FUNCTION__);
 350                 goto out;
 351         }
 352
 353         if(level == 0)
 354                 headset->isMic= 0;//No microphone
 355         else if(level > 0)
 356         {
 357                 headset->isMic = 1;//have mic
 358         //      DBG("enable_irq\n");
 359                 enable_irq(headset_info->irq[HOOK]);
 360                 headset->isHook_irq = enable;
 361         }
 362         DBG("headset->isMic = %d\n",headset->isMic);
 363 out:
 364         return;
 365 }
 366
 367 static ssize_t h2w_print_name(struct switch_dev *sdev, char *buf)
 368 {
 369         return sprintf(buf, "Headset\n");
 370 }
 371
 372 #ifdef CONFIG_HAS_EARLYSUSPEND
 373 static void headset_early_resume(struct early_suspend *h)
 374 {
 375         schedule_delayed_work(&headset_info->h_delayed_work[HEADSET], msecs_to_jiffies(10));
 376         //DBG(">>>>>headset_early_resume\n");
 377 }
 378
 379 static struct early_suspend hs_early_suspend;
 380 #endif
 381
 382 static int rk_Hskey_open(struct input_dev *dev)
 383 {
 384         //struct rk28_adckey *adckey = input_get_drvdata(dev);
 385 //      DBG("===========rk_Hskey_open===========\n");
 386         return 0;
 387 }
 388
 389 static void rk_Hskey_close(struct input_dev *dev)
 390 {
 391 //      DBG("===========rk_Hskey_close===========\n");
 392 //      struct rk28_adckey *adckey = input_get_drvdata(dev);
 393
 394 }
 395
 396 static int rockchip_headsetobserve_probe(struct platform_device *pdev)
 397 {
 398         int ret;
 399         struct headset_priv *headset;
 400         struct rk_headset_pdata *pdata;
 401
 402         headset = kzalloc(sizeof(struct headset_priv), GFP_KERNEL);
 403         if (headset == NULL) {
 404                 dev_err(&pdev->dev, "failed to allocate driver data\n");
 405                 return -ENOMEM;
 406         }
 407         headset->pdata = pdev->dev.platform_data;
 408         pdata = headset->pdata;
 409         headset->headset_status = HEADSET_OUT;
 410         headset->hook_status = HOOK_UP;
 411         headset->isHook_irq = disable;
 412         headset->cur_headset_status = 0;
 413         headset->sdev.name = "h2w";
 414         headset->sdev.print_name = h2w_print_name;
 415         ret = switch_dev_register(&headset->sdev);
 416         if (ret < 0)
 417                 goto failed_free;
 418
 419         mutex_init(&headset->mutex_lock[HEADSET]);
 420         mutex_init(&headset->mutex_lock[HOOK]);
 421
 422         INIT_DELAYED_WORK(&headset->h_delayed_work[HEADSET], headsetobserve_work);
 423         INIT_DELAYED_WORK(&headset->h_delayed_work[HOOK], Hook_work);
 424
 425 //      init_timer(&headset->headset_timer);
 426 //      headset->headset_timer.function = headset_timer_callback;
 427 //      headset->headset_timer.data = (unsigned long)headset;
 428 //      headset->headset_timer.expires = jiffies + 3000;
 429         headset->isMic = 0;
 430         setup_timer(&headset->headset_timer, headset_timer_callback, (unsigned long)headset);
 431 //      headset->headset_timer.expires = jiffies + 1000;
 432 //      add_timer(&headset->headset_timer);
 433 //------------------------------------------------------------------
 434         ret = gpio_request(pdata->Headset_gpio, NULL);
 435         if (ret)
 436                 goto failed_free;
 437         gpio_pull_updown(pdata->Headset_gpio, PullDisable);
 438         gpio_direction_input(pdata->Headset_gpio);
 439         headset->irq[HEADSET] = gpio_to_irq(pdata->Headset_gpio);
 440
 441         if(pdata->headset_in_type == HEADSET_IN_HIGH)
 442                 headset->irq_type[HEADSET] = IRQF_TRIGGER_RISING;
 443         else
 444                 headset->irq_type[HEADSET] = IRQF_TRIGGER_FALLING;
 445         ret = request_irq(headset->irq[HEADSET], headset_interrupt, headset->irq_type[HEADSET], NULL, NULL);
 446         if (ret)
 447                 goto failed_free;
 448         enable_irq_wake(headset->irq[HEADSET]);
 449 //------------------------------------------------------------------
 450         ret = gpio_request(pdata->Hook_gpio , NULL);
 451         if (ret)
 452                 goto failed_free;
 453         gpio_pull_updown(pdata->Hook_gpio, PullDisable);
 454         gpio_direction_input(pdata->Hook_gpio);
 455         headset->irq[HOOK] = gpio_to_irq(pdata->Hook_gpio);
 456         headset->irq_type[HOOK] = IRQF_TRIGGER_FALLING;
 457
 458         ret = request_irq(headset->irq[HOOK], Hook_interrupt, headset->irq_type[HOOK] , NULL, NULL);
 459         if (ret)
 460                 goto failed_free;
 461         disable_irq(headset->irq[HOOK]);
 462 //------------------------------------------------------------------
 463         // Create and register the input driver.
 464         headset->input_dev = input_allocate_device();
 465         if (!headset->input_dev) {
 466                 dev_err(&pdev->dev, "failed to allocate input device\n");
 467                 ret = -ENOMEM;
 468                 goto failed_free;
 469         }
 470         headset->input_dev->name = pdev->name;
 471         headset->input_dev->open = rk_Hskey_open;
 472         headset->input_dev->close = rk_Hskey_close;
 473         headset->input_dev->dev.parent = &pdev->dev;
 474         //input_dev->phys = KEY_PHYS_NAME;
 475         headset->input_dev->id.vendor = 0x0001;
 476         headset->input_dev->id.product = 0x0001;
 477         headset->input_dev->id.version = 0x0100;
 478         // Register the input device
 479         ret = input_register_device(headset->input_dev);
 480         if (ret) {
 481                 dev_err(&pdev->dev, "failed to register input device\n");
 482                 goto failed_free_dev;
 483         }
 484
 485
 486 //      headset->input_dev->keycode = headset->keycodes;
 487 //      headset->input_dev->keycodesize = sizeof(unsigned char);
 488 //      headset->input_dev->keycodemax = 2;
 489
 490 //      set_bit(KEY_MEDIA, headset->input_dev->keybit);
 491 //      clear_bit(0, headset->input_dev->keybit);
 492         input_set_capability(headset->input_dev, EV_KEY, pdata->hook_key_code);
 493 //      input_set_capability(headset->input_dev, EV_SW, SW_HEADPHONE_INSERT);
 494 //      input_set_capability(headset->input_dev, EV_KEY, KEY_END);
 495
 496 //      headset->input_dev->evbit[0] = BIT_MASK(EV_KEY);
 497
 498         headset_info = headset;
 499         schedule_delayed_work(&headset->h_delayed_work[HEADSET], msecs_to_jiffies(500));
 500
 501
 502 #ifdef CONFIG_HAS_EARLYSUSPEND
 503     hs_early_suspend.suspend = NULL;
 504     hs_early_suspend.resume = headset_early_resume;
 505     hs_early_suspend.level = ~0x0;
 506     register_early_suspend(&hs_early_suspend);
 507 #endif
 508
 509         return 0;
 510
 511 failed_free_dev:
 512         platform_set_drvdata(pdev, NULL);
 513         input_free_device(headset->input_dev);
 514 failed_free:
 515         kfree(headset);
 516         return ret;
 517 }
 518
 519 static int rockchip_headsetobserve_suspend(struct platform_device *pdev, pm_message_t state)
 520 {
 521         DBG("%s----%d\n",__FUNCTION__,__LINE__);
 522         disable_irq(headset_info->irq[HEADSET]);
 523         disable_irq(headset_info->irq[HOOK]);
 524
 525         return 0;
 526 }
 527
 528 static int rockchip_headsetobserve_resume(struct platform_device *pdev)
 529 {
 530         DBG("%s----%d\n",__FUNCTION__,__LINE__);
 531         enable_irq(headset_info->irq[HEADSET]);
 532         enable_irq(headset_info->irq[HOOK]);
 533
 534         return 0;
 535 }
 536
 537 static struct platform_driver rockchip_headsetobserve_driver = {
 538         .probe  = rockchip_headsetobserve_probe,
 539 //      .resume =       rockchip_headsetobserve_resume,
 540 //      .suspend =      rockchip_headsetobserve_suspend,
 541         .driver = {
 542                 .name   = "rk_headsetdet",
 543                 .owner  = THIS_MODULE,
 544         },
 545 };
 546
 547 static int __init rockchip_headsetobserve_init(void)
 548 {
 549         platform_driver_register(&rockchip_headsetobserve_driver);
 550         return 0;
 551 }
 552 module_init(rockchip_headsetobserve_init);
 553 MODULE_DESCRIPTION("Rockchip Headset Driver");
 554 MODULE_LICENSE("GPL");