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 #include <linux/slab.h>
  43
  44 /* Debug */
  45 #if 1
  46 #define DBG(x...) printk(x)
  47 #else
  48 #define DBG(x...) do { } while (0)
  49 #endif
  50
  51 #define BIT_HEADSET             (1 << 0)
  52 #define BIT_HEADSET_NO_MIC      (1 << 1)
  53
  54 #define HEADSET 0
  55 #define HOOK 1
  56
  57 #define HEADSET_IN 1
  58 #define HEADSET_OUT 0
  59 #define HOOK_DOWN 0
  60 #define HOOK_UP 1
  61 #define enable 1
  62 #define disable 0
  63
  64
  65 /*#ifdef CONFIG_SND_SOC_WM8994
  66 extern int wm8994_set_status(void);
  67 #endif
  68 */
  69 /* headset private data */
  70 struct headset_priv {
  71         struct input_dev *input_dev;
  72         struct rk_headset_pdata *pdata;
  73         unsigned int headset_status:1;
  74         unsigned int hook_status:1;
  75         unsigned int isMic:1;
  76         unsigned int isHook_irq:1;
  77         int cur_headset_status;
  78
  79         unsigned int irq[2];
  80         unsigned int irq_type[2];
  81         struct delayed_work h_delayed_work[2];
  82         struct switch_dev sdev;
  83         struct mutex mutex_lock[2];
  84         struct timer_list headset_timer;
  85         unsigned char *keycodes;
  86 };
  87 static struct headset_priv *headset_info;
  88
  89 int Headset_isMic(void)
  90 {
  91         return headset_info->isMic;
  92 }
  93 EXPORT_SYMBOL_GPL(Headset_isMic);
  94
  95 static irqreturn_t headset_interrupt(int irq, void *dev_id)
  96 {
  97 //      DBG("---headset_interrupt---\n");
  98         schedule_delayed_work(&headset_info->h_delayed_work[HEADSET], msecs_to_jiffies(50));
  99         return IRQ_HANDLED;
 100 }
 101
 102 static irqreturn_t Hook_interrupt(int irq, void *dev_id)
 103 {
 104 //      DBG("---Hook_interrupt---\n");
 105 //      disable_irq_nosync(headset_info->irq[HOOK]);
 106         schedule_delayed_work(&headset_info->h_delayed_work[HOOK], msecs_to_jiffies(100));
 107         return IRQ_HANDLED;
 108 }
 109
 110 static int headset_change_irqtype(int type,unsigned int irq_type)
 111 {
 112         int ret = 0;
 113 //      DBG("--------%s----------\n",__FUNCTION__);
 114         free_irq(headset_info->irq[type],NULL);
 115
 116         switch(type)
 117         {
 118         case HOOK:
 119                 ret = request_irq(headset_info->irq[type], Hook_interrupt, irq_type, NULL, NULL);
 120                 break;
 121         case HEADSET:
 122                 ret = request_irq(headset_info->irq[type], headset_interrupt, irq_type, NULL, NULL);
 123                 break;
 124         default:
 125                 ret = -1;
 126                 break;
 127         }
 128
 129         if (ret<0)
 130         {
 131                 DBG("headset_change_irqtype: request irq failed\n");
 132         return ret;
 133         }
 134         return ret;
 135 }
 136
 137 static void headsetobserve_work(struct work_struct *work)
 138 {
 139         int i,level = 0;
 140         struct rk_headset_pdata *pdata = headset_info->pdata;
 141         static unsigned int old_status = 0;
 142 //      DBG("---headsetobserve_work---\n");
 143         mutex_lock(&headset_info->mutex_lock[HEADSET]);
 144
 145         for(i=0; i<3; i++)
 146         {
 147                 level = gpio_get_value(pdata->Headset_gpio);
 148                 if(level < 0)
 149                 {
 150                         printk("%s:get pin level again,pin=%d,i=%d\n",__FUNCTION__,pdata->Headset_gpio,i);
 151                         msleep(1);
 152                         continue;
 153                 }
 154                 else
 155                 break;
 156         }
 157         if(level < 0)
 158         {
 159                 printk("%s:get pin level  err!\n",__FUNCTION__);
 160                 goto RE_ERROR;
 161         }
 162
 163         old_status = headset_info->headset_status;
 164         switch(pdata->headset_in_type)
 165         {
 166         case HEADSET_IN_HIGH:
 167                 if(level > 0)
 168                         headset_info->headset_status = HEADSET_IN;
 169                 else if(level == 0)
 170                         headset_info->headset_status = HEADSET_OUT;
 171                 break;
 172         case HEADSET_IN_LOW:
 173                 if(level == 0)
 174                         headset_info->headset_status = HEADSET_IN;
 175                 else if(level > 0)
 176                         headset_info->headset_status = HEADSET_OUT;
 177                 break;
 178         default:
 179                 DBG("---- ERROR: on headset headset_in_type error -----\n");
 180                 break;
 181         }
 182         if(old_status == headset_info->headset_status)
 183         {
 184                 DBG("old_status == headset_info->headset_status\n");
 185                 goto RE_ERROR;
 186         }
 187
 188         switch(pdata->headset_in_type)
 189         {
 190         case HEADSET_IN_HIGH:
 191                 if(level > 0)
 192                 {//in--High level
 193                 //      DBG("--- HEADSET_IN_HIGH headset in HIGH---\n");
 194                 //      enable_irq(headset_info->irq[HOOK]);
 195                         headset_info->cur_headset_status = BIT_HEADSET;
 196                         headset_change_irqtype(HEADSET,IRQF_TRIGGER_FALLING);//
 197                         if (pdata->Headset_gpio != NULL) {
 198                                 del_timer(&headset_info->headset_timer);//Start the timer, wait for switch to the headphone channel
 199                                 headset_info->headset_timer.expires = jiffies + 500;
 200                                 add_timer(&headset_info->headset_timer);
 201                         }
 202                 }
 203                 else if(level == 0)
 204                 {//out--Low level
 205                 //      DBG("---HEADSET_IN_HIGH headset out HIGH---\n");
 206                         if(headset_info->isHook_irq == enable)
 207                         {
 208                         //      DBG("disable_irq\n");
 209                                 headset_info->isHook_irq = disable;
 210                                 disable_irq(headset_info->irq[HOOK]);
 211                         }
 212                         headset_info->cur_headset_status = ~(BIT_HEADSET|BIT_HEADSET_NO_MIC);
 213                         headset_change_irqtype(HEADSET,IRQF_TRIGGER_RISING);//
 214                 }
 215                 break;
 216         case HEADSET_IN_LOW:
 217                 if(level == 0)
 218                 {//in--High level
 219                 //      DBG("---HEADSET_IN_LOW headset in LOW ---\n");
 220                         headset_info->cur_headset_status = BIT_HEADSET;
 221                         headset_change_irqtype(HEADSET,IRQF_TRIGGER_RISING);//
 222                         if (pdata->Headset_gpio != NULL) {
 223                                 del_timer(&headset_info->headset_timer);//Start the timer, wait for switch to the headphone channel
 224                                 headset_info->headset_timer.expires = jiffies + 500;
 225                                 add_timer(&headset_info->headset_timer);
 226                         }
 227                 }
 228                 else if(level > 0)
 229                 {//out--High level
 230                 //      DBG("---HEADSET_IN_LOW headset out LOW ---\n");
 231                         if(headset_info->isHook_irq == enable)
 232                         {
 233                         //      DBG("disable_irq\n");
 234                                 headset_info->isHook_irq = disable;
 235                                 disable_irq(headset_info->irq[HOOK]);
 236                         }
 237                         headset_info->cur_headset_status = ~(BIT_HEADSET|BIT_HEADSET_NO_MIC);
 238                         headset_change_irqtype(HEADSET,IRQF_TRIGGER_FALLING);//
 239                 }
 240                 break;
 241         default:
 242                 DBG("---- ERROR: on headset headset_in_type error -----\n");
 243                 break;
 244         }
 245         rk28_send_wakeup_key();
 246         switch_set_state(&headset_info->sdev, headset_info->cur_headset_status);
 247         DBG("headset_info->cur_headset_status = %d\n",headset_info->cur_headset_status);
 248 RE_ERROR:
 249         mutex_unlock(&headset_info->mutex_lock[HEADSET]);
 250 }
 251
 252 static void Hook_work(struct work_struct *work)
 253 {
 254         int i,level = 0;
 255         struct rk_headset_pdata *pdata = headset_info->pdata;
 256         static unsigned int old_status = HOOK_UP;
 257
 258 //      DBG("---Hook_work---\n");
 259         mutex_lock(&headset_info->mutex_lock[HOOK]);
 260         if(headset_info->headset_status == HEADSET_OUT)
 261         {
 262                 DBG("Headset is out\n");
 263                 goto RE_ERROR;
 264         }
 265         /*#ifdef CONFIG_SND_SOC_WM8994
 266         if(wm8994_set_status() < 0)
 267         {
 268                 DBG("wm8994 is not set on heatset channel or suspend\n");
 269                 goto RE_ERROR;
 270         }
 271         #endif*/
 272         for(i=0; i<3; i++)
 273         {
 274                 level = gpio_get_value(pdata->Hook_gpio);
 275                 if(level < 0)
 276                 {
 277                         printk("%s:get pin level again,pin=%d,i=%d\n",__FUNCTION__,pdata->Hook_gpio,i);
 278                         msleep(1);
 279                         continue;
 280                 }
 281                 else
 282                 break;
 283         }
 284         if(level < 0)
 285         {
 286                 printk("%s:get pin level  err!\n",__FUNCTION__);
 287                 goto RE_ERROR;
 288         }
 289
 290         old_status = headset_info->hook_status;
 291         if(level == 0)
 292                 headset_info->hook_status = HOOK_UP;
 293         else if(level > 0)
 294                 headset_info->hook_status = HOOK_DOWN;
 295         if(old_status == headset_info->hook_status)
 296         {
 297                 DBG("old_status == headset_info->hook_status\n");
 298                 goto RE_ERROR;
 299         }
 300
 301         if(level == 0)
 302         {
 303                 DBG("---HOOK Down ---\n");
 304                 headset_change_irqtype(HOOK,IRQF_TRIGGER_RISING);//
 305                 input_report_key(headset_info->input_dev,pdata->hook_key_code,headset_info->hook_status);
 306                 input_sync(headset_info->input_dev);
 307         }
 308         else if(level > 0)
 309         {
 310                 DBG("---HOOK Up ---\n");
 311                 headset_change_irqtype(HOOK,IRQF_TRIGGER_FALLING);//
 312                 input_report_key(headset_info->input_dev,pdata->hook_key_code,headset_info->hook_status);
 313                 input_sync(headset_info->input_dev);
 314         }
 315 RE_ERROR:
 316         mutex_unlock(&headset_info->mutex_lock[HOOK]);
 317 }
 318
 319 static void headset_timer_callback(unsigned long arg)
 320 {
 321         struct headset_priv *headset = (struct headset_priv *)(arg);
 322         struct rk_headset_pdata *pdata = headset->pdata;
 323         int i,level = 0;
 324
 325         DBG("headset_timer_callback,headset->headset_status=%d\n",headset->headset_status);
 326
 327         if(headset->headset_status == HEADSET_OUT)
 328         {
 329                 DBG("Headset is out\n");
 330                 goto out;
 331         }
 332         /*#ifdef CONFIG_SND_SOC_WM8994
 333         if(wm8994_set_status() < 0)
 334         {
 335                 DBG("wm8994 is not set on heatset channel\n");
 336                 headset_info->headset_timer.expires = jiffies + 500;
 337                 add_timer(&headset_info->headset_timer);
 338                 goto out;
 339         }
 340         #endif*/
 341         for(i=0; i<3; i++)
 342         {
 343                 level = gpio_get_value(pdata->Hook_gpio);
 344                 if(level < 0)
 345                 {
 346                         printk("%s:get pin level again,pin=%d,i=%d\n",__FUNCTION__,pdata->Hook_gpio,i);
 347                         msleep(1);
 348                         continue;
 349                 }
 350                 else
 351                 break;
 352         }
 353         if(level < 0)
 354         {
 355                 printk("%s:get pin level  err!\n",__FUNCTION__);
 356                 goto out;
 357         }
 358
 359         if(level == 0)
 360                 headset->isMic= 0;//No microphone
 361         else if(level > 0)
 362         {
 363                 headset->isMic = 1;//have mic
 364         //      DBG("enable_irq\n");
 365                 enable_irq(headset_info->irq[HOOK]);
 366                 headset->isHook_irq = enable;
 367         }
 368         DBG("headset->isMic = %d\n",headset->isMic);
 369 out:
 370         return;
 371 }
 372
 373 static ssize_t h2w_print_name(struct switch_dev *sdev, char *buf)
 374 {
 375         return sprintf(buf, "Headset\n");
 376 }
 377
 378 #ifdef CONFIG_HAS_EARLYSUSPEND
 379 static void headset_early_resume(struct early_suspend *h)
 380 {
 381         schedule_delayed_work(&headset_info->h_delayed_work[HEADSET], msecs_to_jiffies(10));
 382         //DBG(">>>>>headset_early_resume\n");
 383 }
 384
 385 static struct early_suspend hs_early_suspend;
 386 #endif
 387
 388 static int rk_Hskey_open(struct input_dev *dev)
 389 {
 390         //struct rk28_adckey *adckey = input_get_drvdata(dev);
 391 //      DBG("===========rk_Hskey_open===========\n");
 392         return 0;
 393 }
 394
 395 static void rk_Hskey_close(struct input_dev *dev)
 396 {
 397 //      DBG("===========rk_Hskey_close===========\n");
 398 //      struct rk28_adckey *adckey = input_get_drvdata(dev);
 399
 400 }
 401
 402 static int rockchip_headsetobserve_probe(struct platform_device *pdev)
 403 {
 404         int ret;
 405         struct headset_priv *headset;
 406         struct rk_headset_pdata *pdata;
 407
 408         headset = kzalloc(sizeof(struct headset_priv), GFP_KERNEL);
 409         if (headset == NULL) {
 410                 dev_err(&pdev->dev, "failed to allocate driver data\n");
 411                 return -ENOMEM;
 412         }
 413         headset->pdata = pdev->dev.platform_data;
 414         pdata = headset->pdata;
 415         headset->headset_status = HEADSET_OUT;
 416         headset->hook_status = HOOK_UP;
 417         headset->isHook_irq = disable;
 418         headset->cur_headset_status = 0;
 419         headset->sdev.name = "h2w";
 420         headset->sdev.print_name = h2w_print_name;
 421         ret = switch_dev_register(&headset->sdev);
 422         if (ret < 0)
 423                 goto failed_free;
 424
 425         mutex_init(&headset->mutex_lock[HEADSET]);
 426         mutex_init(&headset->mutex_lock[HOOK]);
 427
 428         INIT_DELAYED_WORK(&headset->h_delayed_work[HEADSET], headsetobserve_work);
 429         INIT_DELAYED_WORK(&headset->h_delayed_work[HOOK], Hook_work);
 430
 431 //      init_timer(&headset->headset_timer);
 432 //      headset->headset_timer.function = headset_timer_callback;
 433 //      headset->headset_timer.data = (unsigned long)headset;
 434 //      headset->headset_timer.expires = jiffies + 3000;
 435         headset->isMic = 0;
 436         setup_timer(&headset->headset_timer, headset_timer_callback, (unsigned long)headset);
 437 //      headset->headset_timer.expires = jiffies + 1000;
 438 //      add_timer(&headset->headset_timer);
 439 //------------------------------------------------------------------
 440         if (pdata->Headset_gpio != NULL) {
 441                 ret = gpio_request(pdata->Headset_gpio, NULL);
 442                 if (ret)
 443                         goto failed_free;
 444                 gpio_pull_updown(pdata->Headset_gpio, PullDisable);
 445                 gpio_direction_input(pdata->Headset_gpio);
 446                 headset->irq[HEADSET] = gpio_to_irq(pdata->Headset_gpio);
 447
 448                 if(pdata->headset_in_type == HEADSET_IN_HIGH)
 449                         headset->irq_type[HEADSET] = IRQF_TRIGGER_RISING;
 450                 else
 451                         headset->irq_type[HEADSET] = IRQF_TRIGGER_FALLING;
 452                 ret = request_irq(headset->irq[HEADSET], headset_interrupt, headset->irq_type[HEADSET], "headset_input", NULL);
 453                 if (ret)
 454                         goto failed_free;
 455                 enable_irq_wake(headset->irq[HEADSET]);
 456         }
 457 //------------------------------------------------------------------
 458         if (pdata->Hook_gpio != NULL) {
 459                 ret = gpio_request(pdata->Hook_gpio , NULL);
 460                 if (ret)
 461                         goto failed_free;
 462                 gpio_pull_updown(pdata->Hook_gpio, PullDisable);
 463                 gpio_direction_input(pdata->Hook_gpio);
 464                 headset->irq[HOOK] = gpio_to_irq(pdata->Hook_gpio);
 465                 headset->irq_type[HOOK] = IRQF_TRIGGER_FALLING;
 466
 467                 ret = request_irq(headset->irq[HOOK], Hook_interrupt, headset->irq_type[HOOK] , "headset_hook", NULL);
 468                 if (ret)
 469                         goto failed_free;
 470                 disable_irq(headset->irq[HOOK]);
 471         }
 472 //------------------------------------------------------------------
 473         // Create and register the input driver.
 474         headset->input_dev = input_allocate_device();
 475         if (!headset->input_dev) {
 476                 dev_err(&pdev->dev, "failed to allocate input device\n");
 477                 ret = -ENOMEM;
 478                 goto failed_free;
 479         }
 480         headset->input_dev->name = pdev->name;
 481         headset->input_dev->open = rk_Hskey_open;
 482         headset->input_dev->close = rk_Hskey_close;
 483         headset->input_dev->dev.parent = &pdev->dev;
 484         //input_dev->phys = KEY_PHYS_NAME;
 485         headset->input_dev->id.vendor = 0x0001;
 486         headset->input_dev->id.product = 0x0001;
 487         headset->input_dev->id.version = 0x0100;
 488         // Register the input device
 489         ret = input_register_device(headset->input_dev);
 490         if (ret) {
 491                 dev_err(&pdev->dev, "failed to register input device\n");
 492                 goto failed_free_dev;
 493         }
 494
 495
 496 //      headset->input_dev->keycode = headset->keycodes;
 497 //      headset->input_dev->keycodesize = sizeof(unsigned char);
 498 //      headset->input_dev->keycodemax = 2;
 499
 500 //      set_bit(KEY_MEDIA, headset->input_dev->keybit);
 501 //      clear_bit(0, headset->input_dev->keybit);
 502         input_set_capability(headset->input_dev, EV_KEY, pdata->hook_key_code);
 503 //      input_set_capability(headset->input_dev, EV_SW, SW_HEADPHONE_INSERT);
 504 //      input_set_capability(headset->input_dev, EV_KEY, KEY_END);
 505
 506 //      headset->input_dev->evbit[0] = BIT_MASK(EV_KEY);
 507
 508         headset_info = headset;
 509         schedule_delayed_work(&headset->h_delayed_work[HEADSET], msecs_to_jiffies(500));
 510
 511 #ifdef CONFIG_HAS_EARLYSUSPEND
 512         hs_early_suspend.suspend = NULL;
 513         hs_early_suspend.resume = headset_early_resume;
 514         hs_early_suspend.level = ~0x0;
 515         register_early_suspend(&hs_early_suspend);
 516 #endif
 517
 518         return 0;
 519
 520 failed_free_dev:
 521         platform_set_drvdata(pdev, NULL);
 522         input_free_device(headset->input_dev);
 523 failed_free:
 524         kfree(headset);
 525         return ret;
 526 }
 527
 528 static int rockchip_headsetobserve_suspend(struct platform_device *pdev, pm_message_t state)
 529 {
 530         DBG("%s----%d\n",__FUNCTION__,__LINE__);
 531         disable_irq(headset_info->irq[HEADSET]);
 532         disable_irq(headset_info->irq[HOOK]);
 533
 534         return 0;
 535 }
 536
 537 static int rockchip_headsetobserve_resume(struct platform_device *pdev)
 538 {
 539         DBG("%s----%d\n",__FUNCTION__,__LINE__);
 540         enable_irq(headset_info->irq[HEADSET]);
 541         enable_irq(headset_info->irq[HOOK]);
 542
 543         return 0;
 544 }
 545
 546 static struct platform_driver rockchip_headsetobserve_driver = {
 547         .probe  = rockchip_headsetobserve_probe,
 548 //      .resume =       rockchip_headsetobserve_resume,
 549 //      .suspend =      rockchip_headsetobserve_suspend,
 550         .driver = {
 551                 .name   = "rk_headsetdet",
 552                 .owner  = THIS_MODULE,
 553         },
 554 };
 555
 556 static int __init rockchip_headsetobserve_init(void)
 557 {
 558         platform_driver_register(&rockchip_headsetobserve_driver);
 559         return 0;
 560 }
 561 module_init(rockchip_headsetobserve_init);
 562 MODULE_DESCRIPTION("Rockchip Headset Driver");
 563 MODULE_LICENSE("GPL");