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>
28 static enum power_supply_property rt5025_adap_props[] = {
29 POWER_SUPPLY_PROP_ONLINE,
32 static char *rt5025_supply_list[] = {
38 static int rt5025_set_charging_current_switch (struct i2c_client *i2c, int onoff)
42 ret = rt5025_set_bits(i2c, RT5025_REG_CHGCTL7, RT5025_CHGCEN_MASK);
44 ret = rt5025_clr_bits(i2c, RT5025_REG_CHGCTL7, RT5025_CHGCEN_MASK);
48 static int rt5025_set_charging_buck(struct i2c_client *i2c, int onoff)
52 ret = rt5025_set_bits(i2c, RT5025_REG_CHGCTL2, RT5025_CHGBUCKEN_MASK);
54 ret = rt5025_clr_bits(i2c, RT5025_REG_CHGCTL2, RT5025_CHGBUCKEN_MASK);
59 static int rt5025_set_charging_current(struct i2c_client *i2c, int cur_value)
68 else if (cur_value >= 500 && cur_value <= 2000)
70 data = (cur_value-500)/100;
78 else if (cur_value > 500 && cur_value <= 1000)
80 else if (cur_value > 100 && cur_value >= 500)
83 rt5025_assign_bits(i2c, RT5025_REG_CHGCTL4, RT5025_CHGAICR_MASK, data);
87 static int rt5025_chgstat_changed(struct rt5025_power_info *info, unsigned new_val)
94 rt5025_set_charging_current_switch(info->i2c, 1);
95 rt5025_set_charging_buck(info->i2c, 1);
97 info->chg_stat = 0x00;
99 if (info->chip->battery_info)
101 if (info->chg_term == 0)
102 rt5025_gauge_set_status(info->chip->battery_info, POWER_SUPPLY_STATUS_CHARGING);
103 else if (info->chg_term > 0)
105 rt5025_gauge_set_status(info->chip->battery_info, POWER_SUPPLY_STATUS_FULL);
111 if (info->event_callback)
112 info->event_callback->rt5025_gauge_set_status(POWER_SUPPLY_STATUS_CHARGING);
116 //rt5025_set_charging_current_switch(info->i2c, 1);
117 info->chg_stat = 0x01;
119 if (info->chip->battery_info)
121 rt5025_gauge_set_status(info->chip->battery_info, POWER_SUPPLY_STATUS_CHARGING);
125 if (info->event_callback)
126 info->event_callback->rt5025_gauge_set_status(POWER_SUPPLY_STATUS_CHARGING);
131 rt5025_set_charging_current_switch(info->i2c, 0);
133 info->chg_stat = 0x02;
135 if (info->chip->battery_info)
137 rt5025_gauge_set_status(info->chip->battery_info, POWER_SUPPLY_STATUS_FULL);
141 if (info->event_callback)
142 info->event_callback->rt5025_gauge_set_status(POWER_SUPPLY_STATUS_FULL);
147 rt5025_set_charging_buck(info->i2c, 0);
148 rt5025_set_charging_current_switch(info->i2c, 0);
150 info->chg_stat = 0x03;
152 if (info->chip->battery_info)
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)
158 rt5025_gauge_set_status(info->chip->battery_info, POWER_SUPPLY_STATUS_FULL);
163 if (info->event_callback)
164 info->event_callback->rt5025_gauge_set_status(POWER_SUPPLY_STATUS_DISCHARGING);
174 int rt5025_power_passirq_to_gauge(struct rt5025_power_info *info)
176 if (info->event_callback)
177 info->event_callback->rt5025_gauge_irq_handler();
180 EXPORT_SYMBOL(rt5025_power_passirq_to_gauge);
183 int rt5025_power_charge_detect(struct rt5025_power_info *info)
186 unsigned char chgstatval = 0;
187 unsigned old_usbval, old_acval, old_chgval, new_usbval, new_acval, new_chgval;
189 old_acval = info->ac_online;
190 old_usbval = info->usb_online;
191 old_chgval = info->chg_stat;
195 ret = rt5025_reg_read(info->i2c, RT5025_REG_CHGSTAT);
198 dev_err(info->dev, "read chg stat reg fail\n");
203 new_acval = (chgstatval&RT5025_CHG_ACONLINE)>>RT5025_CHG_ACSHIFT;
204 if (old_acval != new_acval)
206 info->ac_online = new_acval;
207 power_supply_changed(&info->ac);
209 new_usbval = (chgstatval&RT5025_CHG_USBONLINE)>>RT5025_CHG_USBSHIFT;
210 if (old_usbval != new_usbval)
212 info->usb_online = new_usbval;
213 power_supply_changed(&info->usb);
216 if (old_acval != new_acval || old_usbval != new_usbval)
217 schedule_delayed_work(&info->usb_detect_work, 0); //no delay
219 new_chgval = (chgstatval&RT5025_CHGSTAT_MASK)>>RT5025_CHGSTAT_SHIFT;
221 if (new_acval || new_usbval)
223 //if (old_chgval != new_chgval)
225 ret = rt5025_chgstat_changed(info, new_chgval);
231 rt5025_set_charging_buck(info->i2c, 0);
232 rt5025_set_charging_current_switch(info->i2c, 0);
234 info->chg_stat = RT5025_CHGSTAT_UNKNOWN;
235 if (info->chip->jeita_info)
236 rt5025_notify_charging_cable(info->chip->jeita_info, JEITA_NO_CHARGE);
238 if (info->chip->battery_info)
239 rt5025_gauge_set_status(info->chip->battery_info, POWER_SUPPLY_STATUS_DISCHARGING);
241 if (info->event_callback)
242 info->event_callback->rt5025_gauge_set_status(POWER_SUPPLY_STATUS_NOT_CHARGING);
248 EXPORT_SYMBOL(rt5025_power_charge_detect);
250 static int rt5025_adap_get_props(struct power_supply *psy,
251 enum power_supply_property psp,
252 union power_supply_propval *val)
254 struct rt5025_power_info *info = dev_get_drvdata(psy->dev->parent);
257 case POWER_SUPPLY_PROP_ONLINE:
258 if (psy->type == POWER_SUPPLY_TYPE_MAINS)
259 val->intval = info->ac_online;
260 else if (psy->type == POWER_SUPPLY_TYPE_USB)
261 val->intval = info->usb_online;
272 extern int dwc_vbus_status(void);
275 static void usb_detect_work_func(struct work_struct *work)
277 struct delayed_work *delayed_work = (struct delayed_work *)container_of(work, struct delayed_work, work);
278 struct rt5025_power_info *pi = (struct rt5025_power_info *)container_of(delayed_work, struct rt5025_power_info, usb_detect_work);
280 RTINFO("rt5025: %s ++", __func__);
282 mutex_lock(&pi->var_lock);
285 rt5025_set_charging_current(pi->i2c, 1000);
286 rt5025_notify_charging_cable(pi->chip->jeita_info, JEITA_AC_ADAPTER);
289 else if (pi->usb_online)
291 RTINFO("%s: usb_cnt %d\n", __func__, pi->usb_cnt);
292 switch(dwc_vbus_status())
294 case 2: // USB Wall charger
295 rt5025_set_charging_current(pi->i2c, 1000);
296 rt5025_notify_charging_cable(pi->chip->jeita_info, JEITA_USB_TA);
297 RTINFO("rt5025: detect usb wall charger\n");
301 rt5025_set_charging_current(pi->i2c, 500);
302 rt5025_notify_charging_cable(pi->chip->jeita_info, JEITA_NORMAL_USB);
303 RTINFO("rt5025: detect normal usb\n");
306 if (pi->usb_cnt++ < 60)
307 schedule_delayed_work(&pi->usb_detect_work, 1*HZ);
311 //default to prevent over current charging
312 rt5025_set_charging_current(pi->i2c, 500);
313 rt5025_notify_charging_cable(pi->chip->jeita_info, JEITA_NO_CHARGE);
317 mutex_unlock(&pi->var_lock);
319 RTINFO("rt5025: %s --", __func__);
322 static int __devinit rt5025_init_charger(struct rt5025_power_info *info, struct rt5025_power_data* pd)
324 //unsigned char data;
327 //init charger buckck & charger current en to disable stat
328 info->chg_stat = RT5025_CHGSTAT_UNKNOWN;
330 if (info->event_callback)
331 info->event_callback->rt5025_gauge_set_status(POWER_SUPPLY_STATUS_DISCHARGING);
333 //rt5025_set_bits(info->i2c, RT5025_REG_CHGCTL4, RT5025_CHGRST_MASK);
335 //init register setting
336 rt5025_reg_write(info->i2c, RT5025_REG_CHGCTL2, pd->CHGControl2.val);
337 rt5025_reg_write(info->i2c, RT5025_REG_CHGCTL3, pd->CHGControl3.val);
338 rt5025_reg_write(info->i2c, RT5025_REG_CHGCTL4, pd->CHGControl4.val);
339 rt5025_reg_write(info->i2c, RT5025_REG_CHGCTL5, pd->CHGControl5.val);
340 rt5025_reg_write(info->i2c, RT5025_REG_CHGCTL6, pd->CHGControl6.val);
341 //rt5025_reg_write(info->i2c, RT5025_REG_CHGCTL7, pd->CHGControl7.val);
342 rt5025_assign_bits(info->i2c, RT5025_REG_CHGCTL7, 0xEF, pd->CHGControl7.val);
343 rt5025_reg_write(info->i2c, 0xA9, 0x60 );
344 //Special buck setting
347 data = rt5025_reg_read(info->i2c, 0x47);
349 rt5025_reg_write(info->i2c, 0x47, data);
351 data = rt5025_reg_read(info->i2c, 0x48);
353 rt5025_reg_write(info->i2c, 0x48, data);
355 data = rt5025_reg_read(info->i2c, 0x49);
357 rt5025_reg_write(info->i2c, 0x49, data);
360 rt5025_power_charge_detect(info);
365 static int __devinit rt5025_power_probe(struct platform_device *pdev)
367 struct rt5025_chip *chip = dev_get_drvdata(pdev->dev.parent);
368 struct rt5025_platform_data *pdata = chip->dev->platform_data;
369 struct rt5025_power_info *pi;
372 pi = kzalloc(sizeof(*pi), GFP_KERNEL);
377 pi->dev = &pdev->dev;
379 mutex_init(&pi->var_lock);
380 INIT_DELAYED_WORK(&pi->usb_detect_work, usb_detect_work_func);
383 ret = rt5025_gauge_init(pi);
388 platform_set_drvdata(pdev, pi);
390 pi->ac.name = "rt5025-dc";
391 pi->ac.type = POWER_SUPPLY_TYPE_MAINS;
392 pi->ac.supplied_to = rt5025_supply_list;
393 pi->ac.properties = rt5025_adap_props;
394 pi->ac.num_properties = ARRAY_SIZE(rt5025_adap_props);
395 pi->ac.get_property = rt5025_adap_get_props;
396 ret = power_supply_register(&pdev->dev, &pi->ac);
400 pi->usb.name = "rt5025-usb";
401 pi->usb.type = POWER_SUPPLY_TYPE_USB;
402 pi->ac.supplied_to = rt5025_supply_list;
403 pi->usb.properties = rt5025_adap_props;
404 pi->usb.num_properties = ARRAY_SIZE(rt5025_adap_props);
405 pi->usb.get_property = rt5025_adap_get_props;
406 ret = power_supply_register(&pdev->dev, &pi->usb);
410 rt5025_init_charger(pi, pdata->power_data);
411 chip->power_info = pi;
415 power_supply_unregister(&pi->ac);
422 static int rt5025_power_suspend(struct platform_device *pdev, pm_message_t state)
425 struct rt5025_power_info *pi = platform_get_drvdata(pdev);
427 if (pi->event_callback)
428 pi->event_callback->rt5025_gauge_suspend();
434 static int rt5025_power_resume(struct platform_device *pdev)
437 struct rt5025_power_info *pi = platform_get_drvdata(pdev);
439 if (pi->event_callback)
440 pi->event_callback->rt5025_gauge_resume();
446 static int __devexit rt5025_power_remove(struct platform_device *pdev)
448 struct rt5025_power_info *pi = platform_get_drvdata(pdev);
449 struct rt5025_chip *chip = dev_get_drvdata(pdev->dev.parent);
452 if (pi->event_callback)
453 pi->event_callback->rt5025_gauge_remove();
455 power_supply_unregister(&pi->usb);
456 power_supply_unregister(&pi->ac);
457 chip->power_info = NULL;
463 static struct platform_driver rt5025_power_driver =
466 .name = RT5025_DEVICE_NAME "-power",
467 .owner = THIS_MODULE,
469 .probe = rt5025_power_probe,
470 .remove = __devexit_p(rt5025_power_remove),
471 .suspend = rt5025_power_suspend,
472 .resume = rt5025_power_resume,
475 static int __init rt5025_power_init(void)
477 return platform_driver_register(&rt5025_power_driver);
479 late_initcall_sync(rt5025_power_init);
481 static void __exit rt5025_power_exit(void)
483 platform_driver_unregister(&rt5025_power_driver);
485 module_exit(rt5025_power_exit);
488 MODULE_LICENSE("GPL v2");
489 MODULE_AUTHOR("CY Huang <cy_huang@richtek.com");
490 MODULE_DESCRIPTION("Power/Gauge driver for RT5025");
491 MODULE_ALIAS("platform:" RT5025_DEVICE_NAME "-power");
492 MODULE_VERSION(RT5025_DRV_VER);