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         new_acval = (chgstatval&RT5025_CHG_ACONLINE)>>RT5025_CHG_ACSHIFT;
 230         if (old_acval != new_acval)
 231         {
 232                 info->ac_online = new_acval;
 233                 power_supply_changed(&info->ac);
 234         }
 235         new_usbval = (chgstatval&RT5025_CHG_USBONLINE)>>RT5025_CHG_USBSHIFT;
 236         if (old_usbval != new_usbval)
 237         {
 238                 info->usb_online = new_usbval;
 239                 power_supply_changed(&info->usb);
 240         }
 241
 242         if (old_acval != new_acval || old_usbval != new_usbval)
 243                 schedule_delayed_work(&info->usb_detect_work, 0); //no delay
 244
 245         new_chgval = (chgstatval&RT5025_CHGSTAT_MASK)>>RT5025_CHGSTAT_SHIFT;
 246
 247         if (new_acval || new_usbval)
 248         {
 249                 //if (old_chgval != new_chgval)
 250                 //{
 251                         ret = rt5025_chgstat_changed(info, new_chgval);
 252                 //}
 253         }
 254         else
 255         {
 256                 #if 0
 257                 rt5025_set_charging_buck(info->i2c, 0);
 258                 rt5025_set_charging_current_switch(info->i2c, 0);
 259                 #endif
 260                 info->chg_stat = RT5025_CHGSTAT_UNKNOWN;
 261                 if (info->chip->jeita_info)
 262                         rt5025_notify_charging_cable(info->chip->jeita_info, JEITA_NO_CHARGE);
 263                 #if 1
 264                 if (info->chip->battery_info)
 265                         rt5025_gauge_set_status(info->chip->battery_info, POWER_SUPPLY_STATUS_DISCHARGING);
 266                 #else
 267                 if (info->event_callback)
 268                         info->event_callback->rt5025_gauge_set_status(POWER_SUPPLY_STATUS_NOT_CHARGING);
 269                 #endif
 270         }
 271
 272         return ret;
 273 }
 274 EXPORT_SYMBOL(rt5025_power_charge_detect);
 275
 276 static int rt5025_adap_get_props(struct power_supply *psy,
 277                                 enum power_supply_property psp,
 278                                 union power_supply_propval *val)
 279 {
 280         struct rt5025_power_info *info = dev_get_drvdata(psy->dev->parent);
 281         switch(psp)
 282         {
 283                 case POWER_SUPPLY_PROP_ONLINE:
 284                         if (psy->type == POWER_SUPPLY_TYPE_MAINS)
 285                                 val->intval = info->ac_online;
 286                         else if (psy->type == POWER_SUPPLY_TYPE_USB)
 287                                 val->intval = info->usb_online;
 288                         else
 289                                 return -EINVAL;
 290                         break;
 291                 default:
 292                         return -EINVAL;
 293         }
 294         return 0;
 295 }
 296
 297
 298 extern int dwc_vbus_status(void);
 299
 300
 301 static void usb_detect_work_func(struct work_struct *work)
 302 {
 303         struct delayed_work *delayed_work = (struct delayed_work *)container_of(work, struct delayed_work, work);
 304         struct rt5025_power_info *pi = (struct rt5025_power_info *)container_of(delayed_work, struct rt5025_power_info, usb_detect_work);
 305
 306         RTINFO("rt5025: %s ++", __func__);
 307
 308         mutex_lock(&pi->var_lock);
 309         if (pi->ac_online)
 310         {
 311                 rt5025_set_charging_current(pi->i2c, 1000);
 312                 rt5025_notify_charging_cable(pi->chip->jeita_info, JEITA_AC_ADAPTER);
 313                 pi->usb_cnt = 0;
 314         }
 315         else if (pi->usb_online)
 316         {
 317                 RTINFO("%s: usb_cnt %d\n", __func__, pi->usb_cnt);
 318                 switch(dwc_vbus_status())
 319                 {
 320                         case 2: // USB Wall charger
 321                                 rt5025_set_charging_current(pi->i2c, 1000);
 322                                 rt5025_notify_charging_cable(pi->chip->jeita_info, JEITA_USB_TA);
 323                                 RTINFO("rt5025: detect usb wall charger\n");
 324                                 break;
 325                         case 1: //normal USB
 326                         default:
 327                                 rt5025_set_charging_current(pi->i2c, 500);
 328                                 rt5025_notify_charging_cable(pi->chip->jeita_info, JEITA_NORMAL_USB);
 329                                 RTINFO("rt5025: detect normal usb\n");
 330                                 break;
 331                 }
 332                 if (pi->usb_cnt++ < 60)
 333                         schedule_delayed_work(&pi->usb_detect_work, 1*HZ);
 334         }
 335         else
 336         {
 337                 //default to prevent over current charging
 338                 rt5025_set_charging_current(pi->i2c, 500);
 339                 rt5025_notify_charging_cable(pi->chip->jeita_info, JEITA_NO_CHARGE);
 340                 //reset usb_cnt;
 341                 pi->usb_cnt = 0;
 342         }
 343         mutex_unlock(&pi->var_lock);
 344
 345         RTINFO("rt5025: %s --", __func__);
 346 }
 347
 348 static int __devinit rt5025_init_charger(struct rt5025_power_info *info, struct rt5025_power_data* pd)
 349 {
 350         //unsigned char data;
 351         info->ac_online = 0;
 352         info->usb_online =0;
 353         //init charger buckck & charger current en to disable stat
 354         info->chg_stat = RT5025_CHGSTAT_UNKNOWN;
 355         #if 0
 356         if (info->event_callback)
 357                 info->event_callback->rt5025_gauge_set_status(POWER_SUPPLY_STATUS_DISCHARGING);
 358         #endif
 359         //rt5025_set_bits(info->i2c, RT5025_REG_CHGCTL4, RT5025_CHGRST_MASK);
 360         //udelay(200);
 361         //init register setting
 362         rt5025_reg_write(info->i2c, RT5025_REG_CHGCTL2, pd->CHGControl2.val);
 363         rt5025_reg_write(info->i2c, RT5025_REG_CHGCTL3, pd->CHGControl3.val);
 364         rt5025_reg_write(info->i2c, RT5025_REG_CHGCTL4, pd->CHGControl4.val);
 365         rt5025_reg_write(info->i2c, RT5025_REG_CHGCTL5, pd->CHGControl5.val);
 366         rt5025_reg_write(info->i2c, RT5025_REG_CHGCTL6, pd->CHGControl6.val);
 367         //rt5025_reg_write(info->i2c, RT5025_REG_CHGCTL7, pd->CHGControl7.val);
 368         rt5025_assign_bits(info->i2c, RT5025_REG_CHGCTL7, 0xEF, pd->CHGControl7.val);
 369         rt5025_reg_write(info->i2c, 0xA9, 0x60 );
 370         //Special buck setting
 371         #if 0
 372         //Buck 1
 373         data = rt5025_reg_read(info->i2c, 0x47);
 374         data ^=0xc2;
 375         rt5025_reg_write(info->i2c, 0x47, data);
 376         //Buck 2
 377         data = rt5025_reg_read(info->i2c, 0x48);
 378         data ^=0xc2;
 379         rt5025_reg_write(info->i2c, 0x48, data);
 380         //Buck 3
 381         data = rt5025_reg_read(info->i2c, 0x49);
 382         data ^=0xc2;
 383         rt5025_reg_write(info->i2c, 0x49, data);
 384         #endif  //#if 0
 385
 386         rt5025_power_charge_detect(info);
 387
 388         return 0;
 389 }
 390
 391 static int __devinit rt5025_power_probe(struct platform_device *pdev)
 392 {
 393         struct rt5025_chip *chip = dev_get_drvdata(pdev->dev.parent);
 394         struct rt5025_platform_data *pdata = chip->dev->platform_data;
 395         struct rt5025_power_info *pi;
 396         int ret = 0;
 397
 398         pi = kzalloc(sizeof(*pi), GFP_KERNEL);
 399         if (!pi)
 400                 return -ENOMEM;
 401
 402         pi->i2c = chip->i2c;
 403         pi->dev = &pdev->dev;
 404         pi->chip = chip;
 405         mutex_init(&pi->var_lock);
 406         INIT_DELAYED_WORK(&pi->usb_detect_work, usb_detect_work_func);
 407
 408         #if 0
 409         ret = rt5025_gauge_init(pi);
 410         if (ret)
 411                 goto out;
 412         #endif
 413
 414         platform_set_drvdata(pdev, pi);
 415         dev_ptr = pdev;
 416
 417         pi->ac.name = "rt5025-dc";
 418         pi->ac.type = POWER_SUPPLY_TYPE_MAINS;
 419         pi->ac.supplied_to = rt5025_supply_list;
 420         pi->ac.properties = rt5025_adap_props;
 421         pi->ac.num_properties = ARRAY_SIZE(rt5025_adap_props);
 422         pi->ac.get_property = rt5025_adap_get_props;
 423         ret = power_supply_register(&pdev->dev, &pi->ac);
 424         if (ret)
 425                 goto out;
 426
 427         pi->usb.name = "rt5025-usb";
 428         pi->usb.type = POWER_SUPPLY_TYPE_USB;
 429         pi->ac.supplied_to = rt5025_supply_list;
 430         pi->usb.properties = rt5025_adap_props;
 431         pi->usb.num_properties = ARRAY_SIZE(rt5025_adap_props);
 432         pi->usb.get_property = rt5025_adap_get_props;
 433         ret = power_supply_register(&pdev->dev, &pi->usb);
 434         if (ret)
 435                 goto out_usb;
 436
 437         rt5025_init_charger(pi, pdata->power_data);
 438         chip->power_info = pi;
 439
 440         pr_info("rt5025-power driver is successfully loaded\n");
 441
 442         return ret;
 443 out_usb:
 444         power_supply_unregister(&pi->ac);
 445 out:
 446         kfree(pi);
 447
 448         return ret;
 449 }
 450
 451 static int rt5025_power_suspend(struct platform_device *pdev, pm_message_t state)
 452 {
 453         #if 0
 454         struct rt5025_power_info *pi = platform_get_drvdata(pdev);
 455
 456         if (pi->event_callback)
 457                 pi->event_callback->rt5025_gauge_suspend();
 458         #endif
 459         RTINFO("\n");
 460         return 0;
 461 }
 462
 463 static int rt5025_power_resume(struct platform_device *pdev)
 464 {
 465         #if 0
 466         struct rt5025_power_info *pi = platform_get_drvdata(pdev);
 467
 468         if (pi->event_callback)
 469                 pi->event_callback->rt5025_gauge_resume();
 470         #endif
 471         RTINFO("\n");
 472         return 0;
 473 }
 474
 475 static int __devexit rt5025_power_remove(struct platform_device *pdev)
 476 {
 477         struct rt5025_power_info *pi = platform_get_drvdata(pdev);
 478         struct rt5025_chip *chip = dev_get_drvdata(pdev->dev.parent);
 479
 480         #if 0
 481         if (pi->event_callback)
 482                 pi->event_callback->rt5025_gauge_remove();
 483         #endif
 484         power_supply_unregister(&pi->usb);
 485         power_supply_unregister(&pi->ac);
 486         chip->power_info = NULL;
 487         kfree(pi);
 488         RTINFO("\n");
 489
 490         return 0;
 491 }
 492
 493 static struct platform_driver rt5025_power_driver =
 494 {
 495         .driver = {
 496                 .name = RT5025_DEVICE_NAME "-power",
 497                 .owner = THIS_MODULE,
 498         },
 499         .probe = rt5025_power_probe,
 500         .remove = __devexit_p(rt5025_power_remove),
 501         .suspend = rt5025_power_suspend,
 502         .resume = rt5025_power_resume,
 503 };
 504
 505 static int __init rt5025_power_init(void)
 506 {
 507         return platform_driver_register(&rt5025_power_driver);
 508 }
 509 late_initcall_sync(rt5025_power_init);
 510
 511 static void __exit rt5025_power_exit(void)
 512 {
 513         platform_driver_unregister(&rt5025_power_driver);
 514 }
 515 module_exit(rt5025_power_exit);
 516
 517
 518 MODULE_LICENSE("GPL v2");
 519 MODULE_AUTHOR("CY Huang <cy_huang@richtek.com");
 520 MODULE_DESCRIPTION("Power/Gauge driver for RT5025");
 521 MODULE_ALIAS("platform:" RT5025_DEVICE_NAME "-power");
 522 MODULE_VERSION(RT5025_DRV_VER);