1 /* drivers/power/rt5025-power.c
2 * I2C Driver for Richtek RT5025 PMIC
3 * Multi function device - multi functional baseband PMIC Power part
6 * Author: CY Huang <cy_huang@richtek.com>
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.
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>
27 static struct platform_device *dev_ptr;
30 static enum power_supply_property rt5025_adap_props[] = {
31 POWER_SUPPLY_PROP_ONLINE,
34 static char *rt5025_supply_list[] = {
39 int rt5025_set_charging_current_switch (struct i2c_client *i2c, int onoff)
43 ret = rt5025_set_bits(i2c, RT5025_REG_CHGCTL7, RT5025_CHGCEN_MASK);
45 ret = rt5025_clr_bits(i2c, RT5025_REG_CHGCTL7, RT5025_CHGCEN_MASK);
48 EXPORT_SYMBOL(rt5025_set_charging_current_switch);
50 int rt5025_set_charging_buck(struct i2c_client *i2c, int onoff)
54 ret = rt5025_set_bits(i2c, RT5025_REG_CHGCTL2, RT5025_CHGBUCKEN_MASK);
56 ret = rt5025_clr_bits(i2c, RT5025_REG_CHGCTL2, RT5025_CHGBUCKEN_MASK);
59 EXPORT_SYMBOL(rt5025_set_charging_buck);
61 int rt5025_ext_set_charging_buck(int onoff)
63 struct rt5025_power_info *pi = platform_get_drvdata(dev_ptr);
68 ret = rt5025_set_bits(pi->i2c, RT5025_REG_CHGCTL2, RT5025_CHGBUCKEN_MASK);
74 ret = rt5025_clr_bits(pi->i2c, RT5025_REG_CHGCTL2, RT5025_CHGBUCKEN_MASK);
79 EXPORT_SYMBOL(rt5025_ext_set_charging_buck);
81 static int rt5025_set_charging_current(struct i2c_client *i2c, int cur_value)
90 else if (cur_value >= 500 && cur_value <= 2000)
92 data = (cur_value-500)/100;
100 else if (cur_value > 500 && cur_value <= 1000)
102 else if (cur_value > 100 && cur_value >= 500)
105 rt5025_assign_bits(i2c, RT5025_REG_CHGCTL4, RT5025_CHGAICR_MASK, data);
109 static int rt5025_chgstat_changed(struct rt5025_power_info *info, unsigned new_val)
116 rt5025_set_charging_current_switch(info->i2c, 1);
117 rt5025_set_charging_buck(info->i2c, 1);
119 info->chg_stat = 0x00;
121 if (info->chip->battery_info)
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)
127 rt5025_gauge_set_status(info->chip->battery_info, POWER_SUPPLY_STATUS_FULL);
128 //info->chg_term = 0;
130 else if (info->chg_term > 2)
134 if (info->event_callback)
135 info->event_callback->rt5025_gauge_set_status(POWER_SUPPLY_STATUS_CHARGING);
139 //rt5025_set_charging_current_switch(info->i2c, 1);
140 info->chg_stat = 0x01;
142 if (info->chip->battery_info)
144 rt5025_gauge_set_status(info->chip->battery_info, POWER_SUPPLY_STATUS_CHARGING);
148 if (info->event_callback)
149 info->event_callback->rt5025_gauge_set_status(POWER_SUPPLY_STATUS_CHARGING);
154 rt5025_set_charging_current_switch(info->i2c, 0);
156 info->chg_stat = 0x02;
158 if (info->chip->battery_info)
160 rt5025_gauge_set_status(info->chip->battery_info, POWER_SUPPLY_STATUS_FULL);
164 if (info->event_callback)
165 info->event_callback->rt5025_gauge_set_status(POWER_SUPPLY_STATUS_FULL);
170 rt5025_set_charging_buck(info->i2c, 0);
171 rt5025_set_charging_current_switch(info->i2c, 0);
173 info->chg_stat = 0x03;
175 if (info->chip->battery_info)
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)
181 rt5025_gauge_set_status(info->chip->battery_info, POWER_SUPPLY_STATUS_FULL);
182 //info->chg_term = 0;
184 else if (info->chg_term > 2)
188 if (info->event_callback)
189 info->event_callback->rt5025_gauge_set_status(POWER_SUPPLY_STATUS_DISCHARGING);
199 int rt5025_power_passirq_to_gauge(struct rt5025_power_info *info)
201 if (info->event_callback)
202 info->event_callback->rt5025_gauge_irq_handler();
205 EXPORT_SYMBOL(rt5025_power_passirq_to_gauge);
208 int rt5025_power_charge_detect(struct rt5025_power_info *info)
211 unsigned char chgstatval = 0;
212 unsigned old_usbval, old_acval, old_chgval, new_usbval, new_acval, new_chgval;
214 old_acval = info->ac_online;
215 old_usbval = info->usb_online;
216 old_chgval = info->chg_stat;
220 ret = rt5025_reg_read(info->i2c, RT5025_REG_CHGSTAT);
223 dev_err(info->dev, "read chg stat reg fail\n");
227 RTINFO("chgstat = 0x%02x\n", chgstatval);
229 new_acval = (chgstatval&RT5025_CHG_ACONLINE)>>RT5025_CHG_ACSHIFT;
230 if (old_acval != new_acval)
232 info->ac_online = new_acval;
233 power_supply_changed(&info->ac);
235 new_usbval = (chgstatval&RT5025_CHG_USBONLINE)>>RT5025_CHG_USBSHIFT;
236 if (old_usbval != new_usbval)
238 info->usb_online = new_usbval;
239 power_supply_changed(&info->usb);
242 if (old_acval != new_acval || old_usbval != new_usbval)
243 schedule_delayed_work(&info->usb_detect_work, 0); //no delay
245 new_chgval = (chgstatval&RT5025_CHGSTAT_MASK)>>RT5025_CHGSTAT_SHIFT;
247 if (new_acval || new_usbval)
249 //if (old_chgval != new_chgval)
251 ret = rt5025_chgstat_changed(info, new_chgval);
257 rt5025_set_charging_buck(info->i2c, 0);
258 rt5025_set_charging_current_switch(info->i2c, 0);
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);
264 if (info->chip->battery_info)
265 rt5025_gauge_set_status(info->chip->battery_info, POWER_SUPPLY_STATUS_DISCHARGING);
267 if (info->event_callback)
268 info->event_callback->rt5025_gauge_set_status(POWER_SUPPLY_STATUS_NOT_CHARGING);
274 EXPORT_SYMBOL(rt5025_power_charge_detect);
276 static int rt5025_adap_get_props(struct power_supply *psy,
277 enum power_supply_property psp,
278 union power_supply_propval *val)
280 struct rt5025_power_info *info = dev_get_drvdata(psy->dev->parent);
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;
298 extern int dwc_vbus_status(void);
301 static void usb_detect_work_func(struct work_struct *work)
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);
306 RTINFO("rt5025: %s ++", __func__);
308 mutex_lock(&pi->var_lock);
311 rt5025_set_charging_current(pi->i2c, 1000);
312 rt5025_notify_charging_cable(pi->chip->jeita_info, JEITA_AC_ADAPTER);
315 else if (pi->usb_online)
317 RTINFO("%s: usb_cnt %d\n", __func__, pi->usb_cnt);
318 switch(dwc_vbus_status())
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");
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");
332 if (pi->usb_cnt++ < 60)
333 schedule_delayed_work(&pi->usb_detect_work, 1*HZ);
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);
343 mutex_unlock(&pi->var_lock);
345 RTINFO("rt5025: %s --", __func__);
348 static int __devinit rt5025_init_charger(struct rt5025_power_info *info, struct rt5025_power_data* pd)
350 //unsigned char data;
353 //init charger buckck & charger current en to disable stat
354 info->chg_stat = RT5025_CHGSTAT_UNKNOWN;
356 if (info->event_callback)
357 info->event_callback->rt5025_gauge_set_status(POWER_SUPPLY_STATUS_DISCHARGING);
359 //rt5025_set_bits(info->i2c, RT5025_REG_CHGCTL4, RT5025_CHGRST_MASK);
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
373 data = rt5025_reg_read(info->i2c, 0x47);
375 rt5025_reg_write(info->i2c, 0x47, data);
377 data = rt5025_reg_read(info->i2c, 0x48);
379 rt5025_reg_write(info->i2c, 0x48, data);
381 data = rt5025_reg_read(info->i2c, 0x49);
383 rt5025_reg_write(info->i2c, 0x49, data);
386 rt5025_power_charge_detect(info);
391 static int __devinit rt5025_power_probe(struct platform_device *pdev)
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;
398 pi = kzalloc(sizeof(*pi), GFP_KERNEL);
403 pi->dev = &pdev->dev;
405 mutex_init(&pi->var_lock);
406 INIT_DELAYED_WORK(&pi->usb_detect_work, usb_detect_work_func);
409 ret = rt5025_gauge_init(pi);
414 platform_set_drvdata(pdev, pi);
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);
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);
437 rt5025_init_charger(pi, pdata->power_data);
438 chip->power_info = pi;
440 pr_info("rt5025-power driver is successfully loaded\n");
444 power_supply_unregister(&pi->ac);
451 static int rt5025_power_suspend(struct platform_device *pdev, pm_message_t state)
454 struct rt5025_power_info *pi = platform_get_drvdata(pdev);
456 if (pi->event_callback)
457 pi->event_callback->rt5025_gauge_suspend();
463 static int rt5025_power_resume(struct platform_device *pdev)
466 struct rt5025_power_info *pi = platform_get_drvdata(pdev);
468 if (pi->event_callback)
469 pi->event_callback->rt5025_gauge_resume();
475 static int __devexit rt5025_power_remove(struct platform_device *pdev)
477 struct rt5025_power_info *pi = platform_get_drvdata(pdev);
478 struct rt5025_chip *chip = dev_get_drvdata(pdev->dev.parent);
481 if (pi->event_callback)
482 pi->event_callback->rt5025_gauge_remove();
484 power_supply_unregister(&pi->usb);
485 power_supply_unregister(&pi->ac);
486 chip->power_info = NULL;
493 static struct platform_driver rt5025_power_driver =
496 .name = RT5025_DEVICE_NAME "-power",
497 .owner = THIS_MODULE,
499 .probe = rt5025_power_probe,
500 .remove = __devexit_p(rt5025_power_remove),
501 .suspend = rt5025_power_suspend,
502 .resume = rt5025_power_resume,
505 static int __init rt5025_power_init(void)
507 return platform_driver_register(&rt5025_power_driver);
509 late_initcall_sync(rt5025_power_init);
511 static void __exit rt5025_power_exit(void)
513 platform_driver_unregister(&rt5025_power_driver);
515 module_exit(rt5025_power_exit);
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);