drivers/power/rt5025-power.c

   1 /* drivers/power/rt5025-power.c
   2  * I2C Driver for Richtek RT5025 PMIC
   3  * Multi function device - multi functional baseband PMIC Power part
   4  *
   5  * Copyright (C) 2013
   6  * Author: CY Huang <cy_huang@richtek.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #include <linux/module.h>
  14 #include <linux/kernel.h>
  15 #include <linux/init.h>
  16 #include <linux/i2c.h>
  17 #include <linux/power_supply.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/err.h>
  20 #include <linux/version.h>
  21 #include <linux/slab.h>
  22 #include <linux/workqueue.h>
  23 #include <linux/mfd/rt5025.h>
  24 #include <linux/power/rt5025-power.h>
  25 #include <linux/delay.h>
  26
  27 static struct platform_device *dev_ptr;
  28
  29
  30 static enum power_supply_property rt5025_adap_props[] = {
  31         POWER_SUPPLY_PROP_ONLINE,
  32 };
  33
  34 static char *rt5025_supply_list[] = {
  35         "rt5025-battery",
  36 };
  37
  38
  39 int rt5025_set_charging_current_switch (struct i2c_client *i2c, int onoff)
  40 {
  41         int ret;
  42         if (onoff)
  43                 ret = rt5025_set_bits(i2c, RT5025_REG_CHGCTL7, RT5025_CHGCEN_MASK);
  44         else
  45                 ret = rt5025_clr_bits(i2c, RT5025_REG_CHGCTL7, RT5025_CHGCEN_MASK);
  46         return ret;
  47 }
  48 EXPORT_SYMBOL(rt5025_set_charging_current_switch);
  49
  50 int rt5025_set_charging_buck(struct i2c_client *i2c, int onoff)
  51 {
  52         int ret;
  53         if (onoff)
  54                 ret = rt5025_set_bits(i2c, RT5025_REG_CHGCTL2, RT5025_CHGBUCKEN_MASK);
  55         else
  56                 ret = rt5025_clr_bits(i2c, RT5025_REG_CHGCTL2, RT5025_CHGBUCKEN_MASK);
  57         return ret;
  58 }
  59 EXPORT_SYMBOL(rt5025_set_charging_buck);
  60
  61 int rt5025_ext_set_charging_buck(int onoff)
  62 {
  63         struct rt5025_power_info *pi = platform_get_drvdata(dev_ptr);
  64         int ret;
  65         if (onoff)
  66         {
  67                 pi->otg_en = 0;
  68                 ret = rt5025_set_bits(pi->i2c, RT5025_REG_CHGCTL2, RT5025_CHGBUCKEN_MASK);
  69                 msleep(100);
  70         }
  71         else
  72         {
  73                 pi->otg_en = 1;
  74                 ret = rt5025_clr_bits(pi->i2c, RT5025_REG_CHGCTL2, RT5025_CHGBUCKEN_MASK);
  75                 msleep(100);
  76         }
  77         return ret;
  78 }
  79 EXPORT_SYMBOL(rt5025_ext_set_charging_buck);
  80
  81 static int rt5025_set_charging_current(struct i2c_client *i2c, int cur_value)
  82 {
  83         int ret = 0;
  84         u8 data = 0;
  85
  86         //ICC Setting
  87         #if 0
  88         if (cur_value > 2000)
  89                 data |= 0x0f<<3;
  90         else if (cur_value >= 500 && cur_value <= 2000)
  91         {
  92                 data = (cur_value-500)/100;
  93                 data<<=3;
  94         }
  95         #endif
  96
  97         //AICR Setting
  98         if (cur_value > 1000)
  99                 data |= 0x03<<1;
 100         else if (cur_value > 500 && cur_value <= 1000)
 101                 data |= 0x02<<1;
 102         else if (cur_value > 100 && cur_value >= 500)
 103                 data |= 0x01<<1;
 104
 105         rt5025_assign_bits(i2c, RT5025_REG_CHGCTL4, RT5025_CHGAICR_MASK, data);
 106         return ret;
 107 }
 108
 109 static int rt5025_chgstat_changed(struct rt5025_power_info *info, unsigned new_val)
 110 {
 111         int ret = 0;
 112         switch (new_val)
 113         {
 114                 case 0x00:
 115                         #if 0
 116                         rt5025_set_charging_current_switch(info->i2c, 1);
 117                         rt5025_set_charging_buck(info->i2c, 1);
 118                         #endif
 119                         info->chg_stat = 0x00;
 120                         #if 1
 121                         if (info->chip->battery_info)
 122                         {
 123                                 if (info->chg_term <= 1)
 124                                         rt5025_gauge_set_status(info->chip->battery_info, POWER_SUPPLY_STATUS_CHARGING);
 125                                 else if (info->chg_term == 2)
 126                                 {
 127                                         rt5025_gauge_set_status(info->chip->battery_info, POWER_SUPPLY_STATUS_FULL);
 128                                         //info->chg_term = 0;
 129                                 }
 130                                 else if (info->chg_term > 2)
 131                                         ;
 132                         }
 133                         #else
 134                         if (info->event_callback)
 135                                 info->event_callback->rt5025_gauge_set_status(POWER_SUPPLY_STATUS_CHARGING);
 136                         #endif
 137                         break;
 138                 case 0x01:
 139                         //rt5025_set_charging_current_switch(info->i2c, 1);
 140                         info->chg_stat = 0x01;
 141                         #if 1
 142                         if (info->chip->battery_info)
 143                         {
 144                                 rt5025_gauge_set_status(info->chip->battery_info, POWER_SUPPLY_STATUS_CHARGING);
 145                                 info->chg_term = 0;
 146                         }
 147                         #else
 148                         if (info->event_callback)
 149                                 info->event_callback->rt5025_gauge_set_status(POWER_SUPPLY_STATUS_CHARGING);
 150                         #endif
 151                         break;
 152                 case 0x02:
 153                         #if 0
 154                         rt5025_set_charging_current_switch(info->i2c, 0);
 155                         #endif
 156                         info->chg_stat = 0x02;
 157                         #if 1
 158                         if (info->chip->battery_info)
 159                         {
 160                                 rt5025_gauge_set_status(info->chip->battery_info, POWER_SUPPLY_STATUS_FULL);
 161                                 info->chg_term = 0;
 162                         }
 163                         #else
 164                         if (info->event_callback)
 165                                 info->event_callback->rt5025_gauge_set_status(POWER_SUPPLY_STATUS_FULL);
 166                         #endif
 167                         break;
 168                 case 0x03:
 169                         #if 0
 170                         rt5025_set_charging_buck(info->i2c, 0);
 171                         rt5025_set_charging_current_switch(info->i2c, 0);
 172                         #endif
 173                         info->chg_stat = 0x03;
 174                         #if 1
 175                         if (info->chip->battery_info)
 176                         {
 177                                 if (info->chg_term <= 1)
 178                                         rt5025_gauge_set_status(info->chip->battery_info, POWER_SUPPLY_STATUS_CHARGING);
 179                                 else if (info->chg_term == 2)
 180                                 {
 181                                         rt5025_gauge_set_status(info->chip->battery_info, POWER_SUPPLY_STATUS_FULL);
 182                                         //info->chg_term = 0;
 183                                 }
 184                                 else if (info->chg_term > 2)
 185                                         ;
 186                         }
 187                         #else
 188                         if (info->event_callback)
 189                                 info->event_callback->rt5025_gauge_set_status(POWER_SUPPLY_STATUS_DISCHARGING);
 190                         #endif
 191                         break;
 192                 default:
 193                         break;
 194         }
 195         return ret;
 196 }
 197
 198 #if 0
 199 int rt5025_power_passirq_to_gauge(struct rt5025_power_info *info)
 200 {
 201         if (info->event_callback)
 202                 info->event_callback->rt5025_gauge_irq_handler();
 203         return 0;
 204 }
 205 EXPORT_SYMBOL(rt5025_power_passirq_to_gauge);
 206 #endif
 207
 208 int rt5025_power_charge_detect(struct rt5025_power_info *info)
 209 {
 210         int ret = 0;
 211         unsigned char chgstatval = 0;
 212         unsigned old_usbval, old_acval, old_chgval, new_usbval, new_acval, new_chgval;
 213
 214         old_acval = info->ac_online;
 215         old_usbval = info->usb_online;
 216         old_chgval = info->chg_stat;
 217
 218         mdelay(50);
 219
 220         ret = rt5025_reg_read(info->i2c, RT5025_REG_CHGSTAT);
 221         if (ret<0)
 222         {
 223                 dev_err(info->dev, "read chg stat reg fail\n");
 224                 return ret;
 225         }
 226         chgstatval = ret;
 227         RTINFO("chgstat = 0x%02x\n", chgstatval);
 228
 229         if (info->otg_en)
 230         {
 231                 ret = rt5025_set_bits(info->i2c, RT5025_REG_CHGCTL2, RT5025_CHGBUCKEN_MASK);
 232                 msleep(100);
 233         }
 234
 235         new_acval = (chgstatval&RT5025_CHG_ACONLINE)>>RT5025_CHG_ACSHIFT;
 236         if (old_acval != new_acval)
 237         {
 238                 info->ac_online = new_acval;
 239                 power_supply_changed(&info->ac);
 240         }
 241
 242         new_usbval = (info->otg_en? \
 243                 0:(chgstatval&RT5025_CHG_USBONLINE)>>RT5025_CHG_USBSHIFT);
 244         if (old_usbval != new_usbval)
 245         {
 246                 info->usb_online = new_usbval;
 247                 power_supply_changed(&info->usb);
 248         }
 249
 250         if (info->otg_en && new_acval == 0)
 251         {
 252                 ret = rt5025_clr_bits(info->i2c, RT5025_REG_CHGCTL2, RT5025_CHGBUCKEN_MASK);
 253                 msleep(100);
 254         }
 255
 256         if (old_acval != new_acval || old_usbval != new_usbval)
 257                 schedule_delayed_work(&info->usb_detect_work, 0); //no delay
 258
 259         new_chgval = (chgstatval&RT5025_CHGSTAT_MASK)>>RT5025_CHGSTAT_SHIFT;
 260
 261         if (new_acval || new_usbval)
 262         {
 263                 //if (old_chgval != new_chgval)
 264                 //{
 265                         ret = rt5025_chgstat_changed(info, new_chgval);
 266                 //}
 267         }
 268         else
 269         {
 270                 #if 0
 271                 rt5025_set_charging_buck(info->i2c, 0);
 272                 rt5025_set_charging_current_switch(info->i2c, 0);
 273                 #endif
 274                 info->chg_stat = RT5025_CHGSTAT_UNKNOWN;
 275                 if (info->chip->jeita_info)
 276                         rt5025_notify_charging_cable(info->chip->jeita_info, JEITA_NO_CHARGE);
 277                 #if 1
 278                 if (info->chip->battery_info)
 279                         rt5025_gauge_set_status(info->chip->battery_info, POWER_SUPPLY_STATUS_DISCHARGING);
 280                 #else
 281                 if (info->event_callback)
 282                         info->event_callback->rt5025_gauge_set_status(POWER_SUPPLY_STATUS_NOT_CHARGING);
 283                 #endif
 284         }
 285
 286         return ret;
 287 }
 288 EXPORT_SYMBOL(rt5025_power_charge_detect);
 289
 290 static int rt5025_adap_get_props(struct power_supply *psy,
 291                                 enum power_supply_property psp,
 292                                 union power_supply_propval *val)
 293 {
 294         struct rt5025_power_info *info = dev_get_drvdata(psy->dev->parent);
 295         switch(psp)
 296         {
 297                 case POWER_SUPPLY_PROP_ONLINE:
 298                         if (psy->type == POWER_SUPPLY_TYPE_MAINS)
 299                                 val->intval = info->ac_online;
 300                         else if (psy->type == POWER_SUPPLY_TYPE_USB)
 301                                 val->intval = info->usb_online;
 302                         else
 303                                 return -EINVAL;
 304                         break;
 305                 default:
 306                         return -EINVAL;
 307         }
 308         return 0;
 309 }
 310
 311
 312 extern int dwc_vbus_status(void);
 313
 314
 315 static void usb_detect_work_func(struct work_struct *work)
 316 {
 317         struct delayed_work *delayed_work = (struct delayed_work *)container_of(work, struct delayed_work, work);
 318         struct rt5025_power_info *pi = (struct rt5025_power_info *)container_of(delayed_work, struct rt5025_power_info, usb_detect_work);
 319
 320         RTINFO("rt5025: %s ++", __func__);
 321
 322         mutex_lock(&pi->var_lock);
 323         if (pi->ac_online)
 324         {
 325                 rt5025_set_charging_current(pi->i2c, 2000);
 326                 rt5025_notify_charging_cable(pi->chip->jeita_info, JEITA_AC_ADAPTER);
 327                 pi->usb_cnt = 0;
 328         }
 329         else if (pi->usb_online)
 330         {
 331                 RTINFO("%s: usb_cnt %d\n", __func__, pi->usb_cnt);
 332                 switch(dwc_vbus_status())
 333                 {
 334                         case 2: // USB Wall charger
 335                                 rt5025_set_charging_current(pi->i2c, 2000);
 336                                 rt5025_notify_charging_cable(pi->chip->jeita_info, JEITA_USB_TA);
 337                                 RTINFO("rt5025: detect usb wall charger\n");
 338                                 break;
 339                         case 1: //normal USB
 340                         default:
 341                                 rt5025_set_charging_current(pi->i2c, 2000);
 342                                 rt5025_notify_charging_cable(pi->chip->jeita_info, JEITA_NORMAL_USB);
 343                                 RTINFO("rt5025: detect normal usb\n");
 344                                 break;
 345                 }
 346                 if (pi->usb_cnt++ < 60)
 347                         schedule_delayed_work(&pi->usb_detect_work, 1*HZ);
 348         }
 349         else
 350         {
 351                 //default to prevent over current charging
 352                 rt5025_set_charging_current(pi->i2c, 500);
 353                 rt5025_notify_charging_cable(pi->chip->jeita_info, JEITA_NO_CHARGE);
 354                 //reset usb_cnt;
 355                 pi->usb_cnt = 0;
 356         }
 357         mutex_unlock(&pi->var_lock);
 358
 359         RTINFO("rt5025: %s --", __func__);
 360 }
 361
 362 static int __devinit rt5025_init_charger(struct rt5025_power_info *info, struct rt5025_power_data* pd)
 363 {
 364         //unsigned char data;
 365         info->ac_online = 0;
 366         info->usb_online =0;
 367         //init charger buckck & charger current en to disable stat
 368         info->chg_stat = RT5025_CHGSTAT_UNKNOWN;
 369         #if 0
 370         if (info->event_callback)
 371                 info->event_callback->rt5025_gauge_set_status(POWER_SUPPLY_STATUS_DISCHARGING);
 372         #endif
 373         //rt5025_set_bits(info->i2c, RT5025_REG_CHGCTL4, RT5025_CHGRST_MASK);
 374         //udelay(200);
 375         //init register setting
 376         rt5025_reg_write(info->i2c, RT5025_REG_CHGCTL2, pd->CHGControl2.val);
 377         rt5025_reg_write(info->i2c, RT5025_REG_CHGCTL3, pd->CHGControl3.val);
 378         rt5025_reg_write(info->i2c, RT5025_REG_CHGCTL4, pd->CHGControl4.val);
 379         rt5025_reg_write(info->i2c, RT5025_REG_CHGCTL5, pd->CHGControl5.val);
 380         rt5025_reg_write(info->i2c, RT5025_REG_CHGCTL6, pd->CHGControl6.val);
 381         //rt5025_reg_write(info->i2c, RT5025_REG_CHGCTL7, pd->CHGControl7.val);
 382         rt5025_assign_bits(info->i2c, RT5025_REG_CHGCTL7, 0xEF, pd->CHGControl7.val);
 383         rt5025_reg_write(info->i2c, 0xA9, 0x60 );
 384         //Special buck setting
 385         #if 0
 386         //Buck 1
 387         data = rt5025_reg_read(info->i2c, 0x47);
 388         data ^=0xc2;
 389         rt5025_reg_write(info->i2c, 0x47, data);
 390         //Buck 2
 391         data = rt5025_reg_read(info->i2c, 0x48);
 392         data ^=0xc2;
 393         rt5025_reg_write(info->i2c, 0x48, data);
 394         //Buck 3
 395         data = rt5025_reg_read(info->i2c, 0x49);
 396         data ^=0xc2;
 397         rt5025_reg_write(info->i2c, 0x49, data);
 398         #endif  //#if 0
 399
 400         rt5025_power_charge_detect(info);
 401
 402         return 0;
 403 }
 404
 405 static int __devinit rt5025_power_probe(struct platform_device *pdev)
 406 {
 407         struct rt5025_chip *chip = dev_get_drvdata(pdev->dev.parent);
 408         struct rt5025_platform_data *pdata = chip->dev->platform_data;
 409         struct rt5025_power_info *pi;
 410         int ret = 0;
 411
 412         pi = kzalloc(sizeof(*pi), GFP_KERNEL);
 413         if (!pi)
 414                 return -ENOMEM;
 415
 416         pi->i2c = chip->i2c;
 417         pi->dev = &pdev->dev;
 418         pi->chip = chip;
 419         mutex_init(&pi->var_lock);
 420         INIT_DELAYED_WORK(&pi->usb_detect_work, usb_detect_work_func);
 421
 422         #if 0
 423         ret = rt5025_gauge_init(pi);
 424         if (ret)
 425                 goto out;
 426         #endif
 427
 428         platform_set_drvdata(pdev, pi);
 429         dev_ptr = pdev;
 430
 431         pi->ac.name = "rt5025-dc";
 432         pi->ac.type = POWER_SUPPLY_TYPE_MAINS;
 433         pi->ac.supplied_to = rt5025_supply_list;
 434         pi->ac.properties = rt5025_adap_props;
 435         pi->ac.num_properties = ARRAY_SIZE(rt5025_adap_props);
 436         pi->ac.get_property = rt5025_adap_get_props;
 437         ret = power_supply_register(&pdev->dev, &pi->ac);
 438         if (ret)
 439                 goto out;
 440
 441         pi->usb.name = "rt5025-usb";
 442         pi->usb.type = POWER_SUPPLY_TYPE_USB;
 443         pi->ac.supplied_to = rt5025_supply_list;
 444         pi->usb.properties = rt5025_adap_props;
 445         pi->usb.num_properties = ARRAY_SIZE(rt5025_adap_props);
 446         pi->usb.get_property = rt5025_adap_get_props;
 447         ret = power_supply_register(&pdev->dev, &pi->usb);
 448         if (ret)
 449                 goto out_usb;
 450
 451         rt5025_init_charger(pi, pdata->power_data);
 452         chip->power_info = pi;
 453
 454         pr_info("rt5025-power driver is successfully loaded\n");
 455
 456         return ret;
 457 out_usb:
 458         power_supply_unregister(&pi->ac);
 459 out:
 460         kfree(pi);
 461
 462         return ret;
 463 }
 464
 465 static int rt5025_power_suspend(struct platform_device *pdev, pm_message_t state)
 466 {
 467         #if 0
 468         struct rt5025_power_info *pi = platform_get_drvdata(pdev);
 469
 470         if (pi->event_callback)
 471                 pi->event_callback->rt5025_gauge_suspend();
 472         #endif
 473         RTINFO("\n");
 474         return 0;
 475 }
 476
 477 static int rt5025_power_resume(struct platform_device *pdev)
 478 {
 479         #if 0
 480         struct rt5025_power_info *pi = platform_get_drvdata(pdev);
 481
 482         if (pi->event_callback)
 483                 pi->event_callback->rt5025_gauge_resume();
 484         #endif
 485         RTINFO("\n");
 486         return 0;
 487 }
 488
 489 static int __devexit rt5025_power_remove(struct platform_device *pdev)
 490 {
 491         struct rt5025_power_info *pi = platform_get_drvdata(pdev);
 492         struct rt5025_chip *chip = dev_get_drvdata(pdev->dev.parent);
 493
 494         #if 0
 495         if (pi->event_callback)
 496                 pi->event_callback->rt5025_gauge_remove();
 497         #endif
 498         power_supply_unregister(&pi->usb);
 499         power_supply_unregister(&pi->ac);
 500         chip->power_info = NULL;
 501         kfree(pi);
 502         RTINFO("\n");
 503
 504         return 0;
 505 }
 506
 507 static struct platform_driver rt5025_power_driver =
 508 {
 509         .driver = {
 510                 .name = RT5025_DEVICE_NAME "-power",
 511                 .owner = THIS_MODULE,
 512         },
 513         .probe = rt5025_power_probe,
 514         .remove = __devexit_p(rt5025_power_remove),
 515         .suspend = rt5025_power_suspend,
 516         .resume = rt5025_power_resume,
 517 };
 518
 519 static int __init rt5025_power_init(void)
 520 {
 521         return platform_driver_register(&rt5025_power_driver);
 522 }
 523 late_initcall_sync(rt5025_power_init);
 524
 525 static void __exit rt5025_power_exit(void)
 526 {
 527         platform_driver_unregister(&rt5025_power_driver);
 528 }
 529 module_exit(rt5025_power_exit);
 530
 531
 532 MODULE_LICENSE("GPL v2");
 533 MODULE_AUTHOR("CY Huang <cy_huang@richtek.com");
 534 MODULE_DESCRIPTION("Power/Gauge driver for RT5025");
 535 MODULE_ALIAS("platform:" RT5025_DEVICE_NAME "-power");
 536 MODULE_VERSION(RT5025_DRV_VER);