drivers/headset_observe/rk_headset_irq_hook_adc.c

   1 /*
   2  * Copyright (C) 2009 Rockchip Corporation.
   3  *
   4  * This software is licensed under the terms of the GNU General Public
   5  * License version 2, as published by the Free Software Foundation, and
   6  * may be copied, distributed, and modified under those terms.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  */
  14 #include <linux/module.h>
  15 #include <linux/device.h>
  16 #include <linux/fs.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/workqueue.h>
  19 #include <linux/irq.h>
  20 #include <linux/delay.h>
  21 #include <linux/types.h>
  22 #include <linux/input.h>
  23 #include <linux/platform_device.h>
  24 #include <linux/mutex.h>
  25 #include <linux/errno.h>
  26 #include <linux/err.h>
  27 #include <linux/hrtimer.h>
  28 #include <linux/switch.h>
  29 #include <linux/debugfs.h>
  30 #include <linux/wakelock.h>
  31 #include <linux/pm.h>
  32 #include <linux/i2c.h>
  33 #include <linux/spi/spi.h>
  34 #include <linux/iio/consumer.h>
  35 #include <linux/adc.h>
  36 #include <linux/wakelock.h>
  37 #include <linux/gpio.h>
  38
  39 #include <asm/atomic.h>
  40
  41 #include "rk_headset.h"
  42
  43 /* Debug */
  44 #if 0
  45 #define DBG(x...) printk(x)
  46 #else
  47 #define DBG(x...) do { } while (0)
  48 #endif
  49
  50 #define HOOK_ADC_SAMPLE_TIME    100
  51 #define HOOK_LEVEL_HIGH                 410             //1V*1024/2.5
  52 #define HOOK_LEVEL_LOW                  204             //0.5V*1024/2.5
  53 #define HOOK_DEFAULT_VAL                1024
  54
  55 #define BIT_HEADSET             (1 << 0)
  56 #define BIT_HEADSET_NO_MIC      (1 << 1)
  57
  58 #define HEADSET 0
  59 #define HOOK 1
  60
  61 #define HEADSET_IN 1
  62 #define HEADSET_OUT 0
  63 #define HOOK_DOWN 1
  64 #define HOOK_UP 0
  65 #define enable 1
  66 #define disable 0
  67
  68 #define HEADSET_TIMER 1
  69 #define HOOK_TIMER 2
  70
  71 #define WAIT 2
  72 #define BUSY 1
  73 #define IDLE 0
  74
  75 #ifdef CONFIG_SND_SOC_WM8994
  76 extern int wm8994_headset_mic_detect(bool headset_status);
  77 #endif
  78 #ifdef CONFIG_SND_SOC_RT5631_PHONE
  79 extern int rt5631_headset_mic_detect(bool headset_status);
  80 #endif
  81 #if defined (CONFIG_SND_SOC_RT3261) || defined (CONFIG_SND_SOC_RT3224)
  82 extern int rt3261_headset_mic_detect(int jack_insert);
  83 #endif
  84
  85 /* headset private data */
  86 struct headset_priv {
  87         struct input_dev *input_dev;
  88         struct rk_headset_pdata *pdata;
  89         unsigned int headset_status:1;
  90         unsigned int hook_status:1;
  91         int isMic;
  92         struct iio_channel *chan;
  93         unsigned int heatset_irq_working;// headset interrupt working will not check hook key
  94         int cur_headset_status;
  95
  96         unsigned int irq[2];
  97         unsigned int irq_type[2];
  98         struct delayed_work h_delayed_work[2];
  99         struct switch_dev sdev;
 100         struct mutex mutex_lock[2];
 101         unsigned char *keycodes;
 102         struct delayed_work hook_work;
 103         unsigned int hook_time;//ms
 104 };
 105 static struct headset_priv *headset_info;
 106
 107 //1
 108 static irqreturn_t headset_interrupt(int irq, void *dev_id)
 109 {
 110         struct rk_headset_pdata *pdata = headset_info->pdata;
 111         static unsigned int old_status = 0;
 112         int i,level = 0;
 113
 114         disable_irq_nosync(headset_info->irq[HEADSET]);
 115         if(headset_info->heatset_irq_working == BUSY || headset_info->heatset_irq_working == WAIT)
 116                 return IRQ_HANDLED;
 117
 118         DBG("In the headset_interrupt\n");
 119         headset_info->heatset_irq_working = BUSY;
 120         msleep(150);
 121         for(i=0; i<3; i++)
 122         {
 123                 level = gpio_get_value(pdata->headset_gpio);
 124                 if(level < 0)
 125                 {
 126                         printk("%s:get pin level again,pin=%d,i=%d\n",__FUNCTION__,pdata->headset_gpio,i);
 127                         msleep(1);
 128                         continue;
 129                 }
 130                 else
 131                 break;
 132         }
 133         if(level < 0)
 134         {
 135                 printk("%s:get pin level  err!\n",__FUNCTION__);
 136                 goto out;
 137         }
 138         else
 139                 printk("%s:get pin level again,pin=%d,i=%d\n",__FUNCTION__,pdata->headset_gpio,i);
 140
 141         old_status = headset_info->headset_status;
 142         switch(pdata->headset_insert_type)
 143         {
 144         case HEADSET_IN_HIGH:
 145                 if(level > 0)
 146                         headset_info->headset_status = HEADSET_IN;
 147                 else if(level == 0)
 148                         headset_info->headset_status = HEADSET_OUT;
 149                 break;
 150         case HEADSET_IN_LOW:
 151                 if(level == 0)
 152                         headset_info->headset_status = HEADSET_IN;
 153                 else if(level > 0)
 154                         headset_info->headset_status = HEADSET_OUT;
 155                 break;
 156         default:
 157                 DBG("---- ERROR: on headset headset_insert_type error -----\n");
 158                 break;
 159         }
 160         if(old_status == headset_info->headset_status)
 161         {
 162                 DBG("Read Headset IO level old status == now status =%d\n",headset_info->headset_status);
 163                 goto out;
 164         }
 165
 166         DBG("(headset in is %s)headset status is %s\n",
 167                 pdata->headset_insert_type?"high level":"low level",
 168                 headset_info->headset_status?"in":"out");
 169         if(headset_info->headset_status == HEADSET_IN)
 170         {
 171                 if(pdata->chan != 0)
 172                 {
 173                         //detect Hook key
 174                         schedule_delayed_work(&headset_info->h_delayed_work[HOOK],msecs_to_jiffies(200));
 175                 }
 176                 else
 177                 {
 178                         headset_info->isMic= 0;//No microphone
 179                         headset_info->cur_headset_status = BIT_HEADSET_NO_MIC;
 180
 181                         switch_set_state(&headset_info->sdev, headset_info->cur_headset_status);
 182                         DBG("headset notice android headset status = %d\n",headset_info->cur_headset_status);
 183                 }
 184
 185                 if(pdata->headset_insert_type == HEADSET_IN_HIGH)
 186                         irq_set_irq_type(headset_info->irq[HEADSET],IRQF_TRIGGER_FALLING);
 187                 else
 188                         irq_set_irq_type(headset_info->irq[HEADSET],IRQF_TRIGGER_RISING);
 189         }
 190         else if(headset_info->headset_status == HEADSET_OUT)
 191         {
 192                 headset_info->cur_headset_status = ~(BIT_HEADSET|BIT_HEADSET_NO_MIC);
 193                 cancel_delayed_work(&headset_info->hook_work);
 194                 if(headset_info->isMic)
 195                 {
 196                         headset_info->hook_status = HOOK_UP;
 197                         #ifdef CONFIG_SND_SOC_WM8994
 198                         //rt5625_headset_mic_detect(false);
 199                         wm8994_headset_mic_detect(false);
 200                         #endif
 201                         #if defined (CONFIG_SND_SOC_RT3261) || defined (CONFIG_SND_SOC_RT3224)
 202                         rt3261_headset_mic_detect(false);
 203                         #endif
 204                         #ifdef CONFIG_SND_SOC_RT5631_PHONE
 205                         rt5631_headset_mic_detect(false);
 206                         #endif
 207                 }
 208
 209                 if(pdata->headset_insert_type == HEADSET_IN_HIGH)
 210                         irq_set_irq_type(headset_info->irq[HEADSET],IRQF_TRIGGER_RISING);
 211                 else
 212                         irq_set_irq_type(headset_info->irq[HEADSET],IRQF_TRIGGER_FALLING);
 213
 214                 switch_set_state(&headset_info->sdev, headset_info->cur_headset_status);
 215                 DBG("headset notice android headset status = %d\n",headset_info->cur_headset_status);
 216         }
 217 //      rk_send_wakeup_key();
 218 out:
 219         headset_info->heatset_irq_working = IDLE;
 220         enable_irq(headset_info->irq[HEADSET]);
 221         return IRQ_HANDLED;
 222 }
 223 #if 0
 224 static int headset_change_irqtype(int type,unsigned int irq_type)
 225 {
 226         int ret = 0;
 227         free_irq(headset_info->irq[type],NULL);
 228
 229         DBG("%s: type is %s irqtype is %s\n",__FUNCTION__,      type?"hook":"headset",(irq_type == IRQF_TRIGGER_RISING)?"RISING":"FALLING");
 230 //      DBG("%s: type is %s irqtype is %s\n",__FUNCTION__,      type?"hook":"headset",(irq_type == IRQF_TRIGGER_LOW)?"LOW":"HIGH");
 231         switch(type)
 232         {
 233         case HEADSET:
 234                 ret = request_threaded_irq(headset_info->irq[type],NULL, headset_interrupt, irq_type, "headset_input", NULL);
 235                 if (ret<0)
 236                         DBG("headset_change_irqtype: request irq failed\n");
 237                 break;
 238         default:
 239                 ret = -1;
 240                 break;
 241         }
 242         return ret;
 243 }
 244 #endif
 245 static void hook_once_work(struct work_struct *work)
 246 {
 247         int ret,val;
 248
 249         #ifdef CONFIG_SND_SOC_WM8994
 250         wm8994_headset_mic_detect(true);
 251         #endif
 252
 253         #if defined (CONFIG_SND_SOC_RT3261) || defined (CONFIG_SND_SOC_RT3224)
 254         rt3261_headset_mic_detect(true);
 255         #endif
 256
 257         #ifdef CONFIG_SND_SOC_RT5631_PHONE
 258         rt5631_headset_mic_detect(true);
 259         #endif
 260
 261         ret = iio_read_channel_raw(headset_info->chan, &val);
 262         if (ret < 0) {
 263                 pr_err("read hook_once_work adc channel() error: %d\n", ret);
 264         }
 265         else
 266                 DBG("hook_once_work read adc value: %d\n",val);
 267
 268         if(val >= 0 && val < HOOK_LEVEL_LOW)
 269         {
 270                 headset_info->isMic= 0;//No microphone
 271                 #ifdef CONFIG_SND_SOC_WM8994
 272                 wm8994_headset_mic_detect(false);
 273                 #endif
 274
 275                 #if defined (CONFIG_SND_SOC_RT3261) || defined (CONFIG_SND_SOC_RT3224)
 276                 rt3261_headset_mic_detect(false);
 277                 #endif
 278
 279                 #ifdef CONFIG_SND_SOC_RT5631_PHONE
 280                 rt5631_headset_mic_detect(false);
 281                 #endif
 282         }
 283         else if(val >= HOOK_LEVEL_HIGH)
 284         {
 285                 headset_info->isMic = 1;//have mic
 286                 schedule_delayed_work(&headset_info->hook_work,msecs_to_jiffies(100));
 287         }
 288
 289         headset_info->cur_headset_status = headset_info->isMic ? BIT_HEADSET:BIT_HEADSET_NO_MIC;
 290
 291         switch_set_state(&headset_info->sdev, headset_info->cur_headset_status);
 292         DBG("%s notice android headset status = %d\n",__func__,headset_info->cur_headset_status);
 293 }
 294
 295 //2
 296 static void headsetobserve_work(struct work_struct *work)
 297 {
 298         struct rk_headset_pdata *pdata = headset_info->pdata;
 299
 300         DBG("In the headsetobserve_work headset_status is %s\n",headset_info->headset_status?"in":"out");
 301
 302         if(headset_info->heatset_irq_working == WAIT && headset_info->headset_status == HEADSET_IN)
 303         {
 304                 printk("wait for codec\n");
 305                 headset_info->heatset_irq_working = IDLE;
 306                 headset_info->headset_status = HEADSET_OUT;
 307
 308                 free_irq(headset_info->irq[HEADSET],NULL);
 309                 msleep(100);
 310                 if(pdata->headset_insert_type == HEADSET_IN_HIGH)
 311                         headset_info->irq_type[HEADSET] = IRQF_TRIGGER_LOW|IRQF_ONESHOT;
 312                 else
 313                         headset_info->irq_type[HEADSET] = IRQF_TRIGGER_HIGH|IRQF_ONESHOT;
 314                 if(request_threaded_irq(headset_info->irq[HEADSET], NULL,headset_interrupt, headset_info->irq_type[HEADSET]|IRQF_NO_SUSPEND, "headset_input", NULL) < 0)
 315                         printk("headset request_threaded_irq error\n");
 316                 return;
 317         }
 318 /*
 319         if(pdata->headset_insert_type == HEADSET_IN_HIGH && headset_info->headset_status == HEADSET_IN)
 320                 headset_change_irqtype(HEADSET,IRQF_TRIGGER_FALLING);
 321         else if(pdata->headset_insert_type == HEADSET_IN_LOW && headset_info->headset_status == HEADSET_IN)
 322                 headset_change_irqtype(HEADSET,IRQF_TRIGGER_RISING);
 323
 324         if(pdata->headset_insert_type == HEADSET_IN_HIGH && headset_info->headset_status == HEADSET_OUT)
 325                 headset_change_irqtype(HEADSET,IRQF_TRIGGER_RISING);
 326         else if(pdata->headset_insert_type == HEADSET_IN_LOW && headset_info->headset_status == HEADSET_OUT)
 327                 headset_change_irqtype(HEADSET,IRQF_TRIGGER_FALLING);
 328 */
 329 }
 330 //4
 331 static void hook_work_callback(struct work_struct *work)
 332 {
 333         int ret,val;
 334         struct headset_priv *headset = headset_info;
 335         struct rk_headset_pdata *pdata = headset->pdata;
 336         static unsigned int old_status = HOOK_UP;
 337
 338
 339         ret = iio_read_channel_raw(headset->chan, &val);
 340         if (ret < 0) {
 341                 pr_err("read hook adc channel() error: %d\n", ret);
 342                 goto out;
 343         }
 344         else
 345                 DBG("hook_work_callback read adc value=%d\n",val);
 346
 347         if(headset->headset_status == HEADSET_OUT
 348                 || headset->heatset_irq_working == BUSY
 349                 || headset->heatset_irq_working == WAIT
 350                 || pdata->headset_insert_type?gpio_get_value(pdata->headset_gpio) == 0:gpio_get_value(pdata->headset_gpio) > 0)
 351         {
 352                 DBG("Headset is out or waiting for headset is in or out,after same time check HOOK key\n");
 353                 goto out;
 354         }
 355
 356         old_status = headset->hook_status;
 357         if(val < HOOK_LEVEL_LOW && val >= 0)
 358                 headset->hook_status = HOOK_DOWN;
 359         else if(val > HOOK_LEVEL_HIGH && val < HOOK_DEFAULT_VAL)
 360                 headset->hook_status = HOOK_UP;
 361
 362         DBG("HOOK status is %s , adc value = %d hook_time = %d\n",headset->hook_status?"down":"up",val,headset->hook_time);
 363
 364         if(old_status == headset->hook_status)
 365         {
 366                 DBG("Hook adc read old_status == headset->hook_status=%d hook_time = %d\n",headset->hook_status,headset->hook_time);
 367                 goto status_error;
 368         }
 369
 370         if(headset->headset_status == HEADSET_OUT
 371                 || headset->heatset_irq_working == BUSY
 372                 || headset->heatset_irq_working == WAIT
 373                 || (pdata->headset_insert_type?gpio_get_value(pdata->headset_gpio) == 0:gpio_get_value(pdata->headset_gpio) > 0))
 374         {
 375                 printk("headset is out,HOOK status must discard\n");
 376                 goto out;
 377         }
 378         else
 379         {
 380                 input_report_key(headset->input_dev,HOOK_KEY_CODE,headset->hook_status);
 381                 input_sync(headset->input_dev);
 382         }
 383 status_error:
 384          schedule_delayed_work(&headset_info->hook_work,msecs_to_jiffies(100));
 385 out:;
 386 }
 387
 388 static ssize_t h2w_print_name(struct switch_dev *sdev, char *buf)
 389 {
 390         return sprintf(buf, "Headset\n");
 391 }
 392
 393
 394 static int rk_hskey_open(struct input_dev *dev)
 395 {
 396         return 0;
 397 }
 398
 399 static void rk_hskey_close(struct input_dev *dev)
 400 {
 401
 402 }
 403
 404 int rk_headset_adc_probe(struct platform_device *pdev,struct rk_headset_pdata *pdata)
 405 {
 406         int ret;
 407         struct headset_priv *headset;
 408
 409         headset =devm_kzalloc(&pdev->dev,sizeof(struct headset_priv), GFP_KERNEL);
 410         if (headset == NULL) {
 411                 dev_err(&pdev->dev, "failed to allocate driver data\n");
 412                 return -ENOMEM;
 413         }
 414         headset_info = headset;
 415         headset->pdata = pdata;
 416         headset->headset_status = HEADSET_OUT;
 417         headset->heatset_irq_working = IDLE;
 418         headset->hook_status = HOOK_UP;
 419         headset->hook_time = HOOK_ADC_SAMPLE_TIME;
 420         headset->cur_headset_status = 0;
 421         headset->sdev.name = "h2w";
 422         headset->sdev.print_name = h2w_print_name;
 423         ret = switch_dev_register(&headset->sdev);
 424         if (ret < 0)
 425                 goto failed_free;
 426
 427 //      mutex_init(&headset->mutex_lock[HEADSET]);
 428 //      mutex_init(&headset->mutex_lock[HOOK]);
 429         INIT_DELAYED_WORK(&headset->h_delayed_work[HEADSET], headsetobserve_work);
 430         INIT_DELAYED_WORK(&headset->h_delayed_work[HOOK], hook_once_work);
 431
 432         headset->isMic = 0;
 433 //------------------------------------------------------------------
 434         // Create and register the input driver.
 435         headset->input_dev = input_allocate_device();
 436         if (!headset->input_dev) {
 437                 dev_err(&pdev->dev, "failed to allocate input device\n");
 438                 ret = -ENOMEM;
 439                 goto failed_free;
 440         }
 441         headset->input_dev->name = pdev->name;
 442         headset->input_dev->open = rk_hskey_open;
 443         headset->input_dev->close = rk_hskey_close;
 444         headset->input_dev->dev.parent = &pdev->dev;
 445         //input_dev->phys = KEY_PHYS_NAME;
 446         headset->input_dev->id.vendor = 0x0001;
 447         headset->input_dev->id.product = 0x0001;
 448         headset->input_dev->id.version = 0x0100;
 449         // Register the input device
 450         ret = input_register_device(headset->input_dev);
 451         if (ret) {
 452                 dev_err(&pdev->dev, "failed to register input device\n");
 453                 goto failed_free_dev;
 454         }
 455
 456         input_set_capability(headset->input_dev, EV_KEY, HOOK_KEY_CODE);
 457 //------------------------------------------------------------------
 458         if (pdata->headset_gpio) {
 459                 if(!pdata->headset_gpio){
 460                         dev_err(&pdev->dev,"failed init headset,please full hook_io_init function in board\n");
 461                         goto failed_free_dev;
 462                 }
 463
 464                 headset->irq[HEADSET] = gpio_to_irq(pdata->headset_gpio);
 465
 466                 if(pdata->headset_insert_type == HEADSET_IN_HIGH)
 467                         headset->irq_type[HEADSET] = IRQF_TRIGGER_HIGH|IRQF_ONESHOT;
 468                 else
 469                         headset->irq_type[HEADSET] = IRQF_TRIGGER_LOW|IRQF_ONESHOT;
 470                 ret = request_threaded_irq(headset->irq[HEADSET], NULL,headset_interrupt, headset->irq_type[HEADSET]|IRQF_NO_SUSPEND, "headset_input", NULL);
 471                 if (ret)
 472                         goto failed_free_dev;
 473                 if (pdata->headset_wakeup)
 474                         enable_irq_wake(headset->irq[HEADSET]);
 475         }
 476         else
 477                 goto failed_free_dev;
 478 //------------------------------------------------------------------
 479         if(pdata->chan != NULL)
 480         {
 481                 headset->chan = pdata->chan;
 482                 INIT_DELAYED_WORK(&headset->hook_work, hook_work_callback);
 483         }
 484
 485         return 0;
 486
 487 failed_free_dev:
 488         platform_set_drvdata(pdev, NULL);
 489         input_free_device(headset->input_dev);
 490 failed_free:
 491         dev_err(&pdev->dev, "failed to headset probe\n");
 492         return ret;
 493 }
 494
 495 int rk_headset_adc_suspend(struct platform_device *pdev, pm_message_t state)
 496 {
 497         DBG("%s----%d\n",__FUNCTION__,__LINE__);
 498 //      disable_irq(headset_info->irq[HEADSET]);
 499 //      del_timer(&headset_info->hook_timer);
 500         return 0;
 501 }
 502
 503 int rk_headset_adc_resume(struct platform_device *pdev)
 504 {
 505         DBG("%s----%d\n",__FUNCTION__,__LINE__);
 506 //      enable_irq(headset_info->irq[HEADSET]);
 507 //      if(headset_info->isMic)
 508 //              mod_timer(&headset_info->hook_timer, jiffies + msecs_to_jiffies(1500));
 509         return 0;
 510 }
 511
 512