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