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/device.h>
  18 #include <linux/fs.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/workqueue.h>
  21 #include <linux/irq.h>
  22 #include <linux/delay.h>
  23 #include <linux/types.h>
  24 #include <linux/input.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/mutex.h>
  27 #include <linux/errno.h>
  28 #include <linux/err.h>
  29 #include <linux/hrtimer.h>
  30 #include <linux/switch.h>
  31 #include <linux/debugfs.h>
  32 #include <linux/wakelock.h>
  33 #include <linux/gpio.h>
  34 #include <asm/atomic.h>
  35 #include <linux/pm.h>
  36 #include <linux/i2c.h>
  37 #include <linux/spi/spi.h>
  38 #include "rk_headset.h"
  39 #ifdef CONFIG_HAS_EARLYSUSPEND
  40 #include <linux/earlysuspend.h>
  41 #endif
  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 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 1
  59 #define HOOK_UP 0
  60 #define enable 1
  61 #define disable 0
  62
  63 #if defined(CONFIG_SND_RK_SOC_RK2928) || defined(CONFIG_SND_RK29_SOC_RK610)
  64 extern void rk2928_codec_set_spk(bool on);
  65 #endif
  66 #ifdef CONFIG_SND_SOC_WM8994
  67 extern int wm8994_set_status(void);
  68 #endif
  69
  70 /* headset private data */
  71 struct headset_priv {
  72         struct input_dev *input_dev;
  73         struct rk_headset_pdata *pdata;
  74         unsigned int headset_status:1;
  75         unsigned int hook_status:1;
  76         unsigned int isMic:1;
  77         unsigned int isHook_irq:1;
  78         int cur_headset_status;
  79
  80         unsigned int irq[2];
  81         unsigned int irq_type[2];
  82         struct delayed_work h_delayed_work[2];
  83         struct switch_dev sdev;
  84         struct mutex mutex_lock[2];
  85         struct timer_list headset_timer;
  86         unsigned char *keycodes;
  87 };
  88 static struct headset_priv *headset_info;
  89
  90 #ifdef CONFIG_MODEM_MIC_SWITCH
  91 #define HP_MIC 0
  92 #define MAIN_MIC 1
  93 void Modem_Mic_switch(int value)
  94 {
  95         if(value == HP_MIC)
  96                 gpio_set_value(headset_info->pdata->mic_switch_gpio, headset_info->pdata->hp_mic_io_value);
  97         else if(value == MAIN_MIC)
  98                 gpio_set_value(headset_info->pdata->mic_switch_gpio,headset_info->pdata->main_mic_io_value);
  99 }
 100 void Modem_Mic_release(void)
 101 {
 102         if(headset_info->cur_headset_status == 1)
 103                 gpio_set_value(headset_info->pdata->mic_switch_gpio, headset_info->pdata->hp_mic_io_value);
 104         else
 105                 gpio_set_value(headset_info->pdata->mic_switch_gpio,headset_info->pdata->main_mic_io_value);
 106 }
 107 #endif
 108
 109 static int read_gpio(int gpio)
 110 {
 111         int i,level;
 112         for(i=0; i<3; i++)
 113         {
 114                 level = gpio_get_value(gpio);
 115                 if(level < 0)
 116                 {
 117                         printk("%s:get pin level again,pin=%d,i=%d\n",__FUNCTION__,gpio,i);
 118                         msleep(1);
 119                         continue;
 120                 }
 121                 else
 122                 break;
 123         }
 124         if(level < 0)
 125                 printk("%s:get pin level  err!\n",__FUNCTION__);
 126
 127         return level;
 128 }
 129
 130 static irqreturn_t headset_interrupt(int irq, void *dev_id)
 131 {
 132         DBG("---headset_interrupt---\n");
 133         schedule_delayed_work(&headset_info->h_delayed_work[HEADSET], msecs_to_jiffies(50));
 134         return IRQ_HANDLED;
 135 }
 136
 137 static irqreturn_t hook_interrupt(int irq, void *dev_id)
 138 {
 139         DBG("---Hook_interrupt---\n");
 140 //      disable_irq_nosync(headset_info->irq[HOOK]);
 141         schedule_delayed_work(&headset_info->h_delayed_work[HOOK], msecs_to_jiffies(100));
 142         return IRQ_HANDLED;
 143 }
 144
 145 static void headsetobserve_work(struct work_struct *work)
 146 {
 147         int level = 0;
 148         int level2 = 0;
 149         struct rk_headset_pdata *pdata = headset_info->pdata;
 150         static unsigned int old_status = 0;
 151         DBG("---headsetobserve_work---\n");
 152         mutex_lock(&headset_info->mutex_lock[HEADSET]);
 153
 154         level = read_gpio(pdata->headset_gpio);
 155         if(level < 0)
 156                 goto out;
 157         msleep(100);
 158         level2 = read_gpio(pdata->headset_gpio);
 159         if(level2 < 0)
 160                 goto out;
 161         if(level2 != level)
 162                 goto out;
 163         old_status = headset_info->headset_status;
 164         if(pdata->headset_insert_type == HEADSET_IN_HIGH)
 165                 headset_info->headset_status = level?HEADSET_IN:HEADSET_OUT;
 166         else
 167                 headset_info->headset_status = level?HEADSET_OUT:HEADSET_IN;
 168
 169         if(old_status == headset_info->headset_status)  {
 170                 DBG("old_status == headset_info->headset_status\n");
 171                 goto out;
 172         }
 173
 174         DBG("(headset in is %s)headset status is %s\n",
 175                 pdata->headset_insert_type?"high level":"low level",
 176                 headset_info->headset_status?"in":"out");
 177
 178         if(headset_info->headset_status == HEADSET_IN)
 179         {
 180                 headset_info->cur_headset_status = BIT_HEADSET_NO_MIC;
 181                 if(pdata->headset_insert_type == HEADSET_IN_HIGH)
 182                         irq_set_irq_type(headset_info->irq[HEADSET],IRQF_TRIGGER_FALLING);
 183                 else
 184                         irq_set_irq_type(headset_info->irq[HEADSET],IRQF_TRIGGER_RISING);
 185                 if (pdata->hook_gpio) {
 186                         del_timer(&headset_info->headset_timer);//Start the timer, wait for switch to the headphone channel
 187                         headset_info->headset_timer.expires = jiffies + 100;
 188                         add_timer(&headset_info->headset_timer);
 189                         goto out;
 190                 }
 191         }
 192         else if(headset_info->headset_status == HEADSET_OUT)
 193         {
 194                 headset_info->hook_status = HOOK_UP;
 195                 if(headset_info->isHook_irq == enable)
 196                 {
 197                         DBG("disable headset_hook irq\n");
 198                         headset_info->isHook_irq = disable;
 199                         disable_irq(headset_info->irq[HOOK]);
 200                 }
 201                 headset_info->cur_headset_status = 0;//~(BIT_HEADSET|BIT_HEADSET_NO_MIC);
 202                 //#if defined(CONFIG_SND_RK_SOC_RK2928) || defined(CONFIG_SOC_RK3028)
 203                 //rk2928_codec_set_spk(HEADSET_OUT);
 204                 //#endif
 205                 if(pdata->headset_insert_type == HEADSET_IN_HIGH)
 206                         irq_set_irq_type(headset_info->irq[HEADSET],IRQF_TRIGGER_RISING);
 207                 else
 208                         irq_set_irq_type(headset_info->irq[HEADSET],IRQF_TRIGGER_FALLING);
 209         }
 210 //      rk28_send_wakeup_key();
 211         switch_set_state(&headset_info->sdev, headset_info->cur_headset_status);
 212         #if defined(CONFIG_SND_RK_SOC_RK2928) || defined(CONFIG_SND_RK29_SOC_RK610)
 213         if (headset_info->headset_status == HEADSET_OUT)
 214         {
 215                 mdelay(200);
 216                 rk2928_codec_set_spk(HEADSET_OUT);
 217                 gpio_set_value(pdata->Sw_mic_gpio, headset_info->pdata->Main_mic_io_value);
 218         }
 219         #endif
 220         DBG("headset_info->cur_headset_status = %d\n",headset_info->cur_headset_status);
 221
 222 out:
 223         mutex_unlock(&headset_info->mutex_lock[HEADSET]);
 224 }
 225
 226 static void hook_work(struct work_struct *work)
 227 {
 228         int level = 0;
 229         struct rk_headset_pdata *pdata = headset_info->pdata;
 230         static unsigned int old_status = HOOK_UP;
 231
 232         mutex_lock(&headset_info->mutex_lock[HOOK]);
 233
 234         if(headset_info->headset_status == HEADSET_OUT){
 235                 DBG("Headset is out\n");
 236                 goto RE_ERROR;
 237         }
 238
 239         #ifdef CONFIG_SND_SOC_WM8994
 240         if(wm8994_set_status() != 0)    {
 241                 DBG("wm8994 is not set on heatset channel or suspend\n");
 242                 goto RE_ERROR;
 243         }
 244         #endif
 245
 246         level = read_gpio(pdata->hook_gpio);
 247         if(level < 0)
 248                 goto RE_ERROR;
 249
 250         old_status = headset_info->hook_status;
 251         DBG("Hook_work -- level = %d\n",level);
 252
 253         if(level == 0)
 254                 headset_info->hook_status = pdata->hook_down_type == HOOK_DOWN_HIGH?HOOK_UP:HOOK_DOWN;
 255         else if(level > 0)
 256                 headset_info->hook_status = pdata->hook_down_type == HOOK_DOWN_HIGH?HOOK_DOWN:HOOK_UP;
 257
 258         if(old_status == headset_info->hook_status)
 259         {
 260                 DBG("old_status == headset_info->hook_status\n");
 261                 goto RE_ERROR;
 262         }
 263         DBG("Hook_work -- level = %d  hook status is %s\n",level,headset_info->hook_status?"key down":"key up");
 264         if(headset_info->hook_status == HOOK_DOWN)
 265         {
 266                 if(pdata->hook_down_type == HOOK_DOWN_HIGH)
 267                         irq_set_irq_type(headset_info->irq[HOOK],IRQF_TRIGGER_FALLING);
 268                 else
 269                         irq_set_irq_type(headset_info->irq[HOOK],IRQF_TRIGGER_RISING);
 270         }
 271         else
 272         {
 273                 if(pdata->hook_down_type == HOOK_DOWN_HIGH)
 274                         irq_set_irq_type(headset_info->irq[HOOK],IRQF_TRIGGER_RISING);
 275                 else
 276                         irq_set_irq_type(headset_info->irq[HOOK],IRQF_TRIGGER_FALLING);
 277         }
 278         input_report_key(headset_info->input_dev,HOOK_KEY_CODE,headset_info->hook_status);
 279         input_sync(headset_info->input_dev);
 280 RE_ERROR:
 281         mutex_unlock(&headset_info->mutex_lock[HOOK]);
 282 }
 283
 284 static void headset_timer_callback(unsigned long arg)
 285 {
 286         struct headset_priv *headset = (struct headset_priv *)(arg);
 287         struct rk_headset_pdata *pdata = headset->pdata;
 288         int level = 0;
 289
 290 //      printk("headset_timer_callback,headset->headset_status=%d\n",headset->headset_status);
 291
 292         if(headset->headset_status == HEADSET_OUT)
 293         {
 294                 printk("Headset is out\n");
 295                 goto out;
 296         }
 297         #ifdef CONFIG_SND_SOC_WM8994
 298         if(wm8994_set_status() != 0)
 299         {
 300         //      printk("wait wm8994 set the MICB2\n");
 301         //      headset_info->headset_timer.expires = jiffies + 500;
 302                 headset_info->headset_timer.expires = jiffies + 10;
 303                 add_timer(&headset_info->headset_timer);
 304                 goto out;
 305         }
 306         #endif
 307         level = read_gpio(pdata->hook_gpio);
 308         if(level < 0)
 309                 goto out;
 310         if((level > 0 && pdata->hook_down_type == HOOK_DOWN_LOW)
 311                 || (level == 0 && pdata->hook_down_type == HOOK_DOWN_HIGH))
 312         {
 313                 headset->isMic = 1;//have mic
 314                 DBG("enable headset_hook irq\n");
 315                 enable_irq(headset_info->irq[HOOK]);
 316                 headset->isHook_irq = enable;
 317                 headset_info->hook_status = HOOK_UP;
 318                 if(pdata->hook_down_type == HOOK_DOWN_HIGH)
 319                         irq_set_irq_type(headset_info->irq[HOOK],IRQF_TRIGGER_RISING);
 320                 else
 321                         irq_set_irq_type(headset_info->irq[HOOK],IRQF_TRIGGER_FALLING);
 322
 323         }
 324         else
 325                 headset->isMic= 0;//No microphone
 326
 327         printk("headset->isMic = %d\n",headset->isMic);
 328         headset_info->cur_headset_status = headset_info->isMic ? 1:2;//BIT_HEADSET:BIT_HEADSET_NO_MIC;//
 329         #if defined(CONFIG_SND_RK_SOC_RK2928) || defined(CONFIG_SND_RK29_SOC_RK610)
 330         rk2928_codec_set_spk(HEADSET_IN);
 331         if(headset_info->cur_headset_status == 1)
 332                 gpio_set_value(pdata->Sw_mic_gpio, pdata->Hp_mic_io_value);
 333         #endif
 334 //      rk28_send_wakeup_key();
 335         switch_set_state(&headset_info->sdev, headset_info->cur_headset_status);
 336
 337         DBG("headset_info->cur_headset_status = %d\n",headset_info->cur_headset_status);
 338
 339 out:
 340         return;
 341 }
 342
 343 static ssize_t h2w_print_name(struct switch_dev *sdev, char *buf)
 344 {
 345         return sprintf(buf, "Headset\n");
 346 }
 347
 348 #ifdef CONFIG_HAS_EARLYSUSPEND
 349 static void headset_early_resume(struct early_suspend *h)
 350 {
 351         schedule_delayed_work(&headset_info->h_delayed_work[HEADSET], msecs_to_jiffies(10));
 352         //DBG(">>>>>headset_early_resume\n");
 353 }
 354
 355 static struct early_suspend hs_early_suspend;
 356 #endif
 357
 358 static int rk_hskey_open(struct input_dev *dev)
 359 {
 360         //struct rk28_adckey *adckey = input_get_drvdata(dev);
 361 //      DBG("===========rk_Hskey_open===========\n");
 362         return 0;
 363 }
 364
 365 static void rk_hskey_close(struct input_dev *dev)
 366 {
 367 //      DBG("===========rk_Hskey_close===========\n");
 368 //      struct rk28_adckey *adckey = input_get_drvdata(dev);
 369
 370 }
 371
 372 int rk_headset_probe(struct platform_device *pdev,struct rk_headset_pdata *pdata)
 373 {
 374         int ret;
 375         struct headset_priv *headset;
 376
 377         headset = kzalloc(sizeof(struct headset_priv), GFP_KERNEL);
 378         if (headset == NULL) {
 379                 dev_err(&pdev->dev, "failed to allocate driver data\n");
 380                 return -ENOMEM;
 381         }
 382
 383         headset->pdata = pdata;
 384         headset->headset_status = HEADSET_OUT;
 385         headset->hook_status = HOOK_UP;
 386         headset->isHook_irq = disable;
 387         headset->cur_headset_status = 0;
 388         headset->sdev.name = "h2w";
 389         headset->sdev.print_name = h2w_print_name;
 390         ret = switch_dev_register(&headset->sdev);
 391         if (ret < 0)
 392                 goto failed_free;
 393
 394         mutex_init(&headset->mutex_lock[HEADSET]);
 395         mutex_init(&headset->mutex_lock[HOOK]);
 396
 397         INIT_DELAYED_WORK(&headset->h_delayed_work[HEADSET], headsetobserve_work);
 398         INIT_DELAYED_WORK(&headset->h_delayed_work[HOOK], hook_work);
 399
 400         headset->isMic = 0;
 401         setup_timer(&headset->headset_timer, headset_timer_callback, (unsigned long)headset);
 402 //------------------------------------------------------------------
 403         // Create and register the input driver.
 404         headset->input_dev = input_allocate_device();
 405         if (!headset->input_dev) {
 406                 dev_err(&pdev->dev, "failed to allocate input device\n");
 407                 ret = -ENOMEM;
 408                 goto failed_free;
 409         }
 410         headset->input_dev->name = pdev->name;
 411         headset->input_dev->open = rk_hskey_open;
 412         headset->input_dev->close = rk_hskey_close;
 413         headset->input_dev->dev.parent = &pdev->dev;
 414         //input_dev->phys = KEY_PHYS_NAME;
 415         headset->input_dev->id.vendor = 0x0001;
 416         headset->input_dev->id.product = 0x0001;
 417         headset->input_dev->id.version = 0x0100;
 418         // Register the input device
 419         ret = input_register_device(headset->input_dev);
 420         if (ret) {
 421                 dev_err(&pdev->dev, "failed to register input device\n");
 422                 goto failed_free_dev;
 423         }
 424         input_set_capability(headset->input_dev, EV_KEY,HOOK_KEY_CODE);
 425
 426 #ifdef CONFIG_HAS_EARLYSUSPEND
 427         hs_early_suspend.suspend = NULL;
 428         hs_early_suspend.resume = headset_early_resume;
 429         hs_early_suspend.level = ~0x0;
 430         register_early_suspend(&hs_early_suspend);
 431 #endif
 432         //------------------------------------------------------------------
 433         if (pdata->headset_gpio) {
 434                 if(!pdata->headset_gpio){
 435                         dev_err(&pdev->dev,"failed init headset,please full hook_io_init function in board\n");
 436                         goto failed_free_dev;
 437                 }
 438
 439                 headset->irq[HEADSET] = gpio_to_irq(pdata->headset_gpio);
 440
 441                 if(pdata->headset_insert_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], "headset_input", NULL);
 446                 if (ret)
 447                         goto failed_free_dev;
 448                 if (pdata->headset_wakeup)
 449                         enable_irq_wake(headset->irq[HEADSET]);
 450         }
 451         else
 452                 goto failed_free_dev;
 453 //------------------------------------------------------------------
 454         if (pdata->hook_gpio) {
 455                 headset->irq[HOOK] = gpio_to_irq(pdata->hook_gpio);
 456                 headset->irq_type[HOOK] = pdata->hook_down_type == HOOK_DOWN_HIGH ? IRQF_TRIGGER_RISING : IRQF_TRIGGER_FALLING;
 457
 458                 ret = request_irq(headset->irq[HOOK], hook_interrupt, headset->irq_type[HOOK] , "headset_hook", NULL);
 459                 if (ret)
 460                         goto failed_free_dev;
 461                 disable_irq(headset->irq[HOOK]);
 462         }
 463 //------------------------------------------------------------------
 464         headset_info = headset;
 465         schedule_delayed_work(&headset->h_delayed_work[HEADSET], msecs_to_jiffies(500));
 466         return 0;
 467
 468 failed_free_dev:
 469         platform_set_drvdata(pdev, NULL);
 470         input_free_device(headset->input_dev);
 471 failed_free:
 472         dev_err(&pdev->dev, "failed to headset probe\n");
 473         kfree(headset);
 474         return ret;
 475 }
 476
 477
 478