155 static bool spwr_battery_present(struct spwr_battery_device *bat)  in spwr_battery_present()  argument
157 	lockdep_assert_held(&bat->lock);  in spwr_battery_present()
159 	return le32_to_cpu(bat->sta) & SAM_BATTERY_STA_PRESENT;  in spwr_battery_present()
162 static int spwr_battery_load_sta(struct spwr_battery_device *bat)  in spwr_battery_load_sta()  argument
164 	lockdep_assert_held(&bat->lock);  in spwr_battery_load_sta()
166 	return ssam_retry(ssam_bat_get_sta, bat->sdev, &bat->sta);  in spwr_battery_load_sta()
169 static int spwr_battery_load_bix(struct spwr_battery_device *bat)  in spwr_battery_load_bix()  argument
173 	lockdep_assert_held(&bat->lock);  in spwr_battery_load_bix()
175 	if (!spwr_battery_present(bat))  in spwr_battery_load_bix()
178 	status = ssam_retry(ssam_bat_get_bix, bat->sdev, &bat->bix);  in spwr_battery_load_bix()
181 	bat->bix.model[ARRAY_SIZE(bat->bix.model) - 1] = 0;  in spwr_battery_load_bix()
182 	bat->bix.serial[ARRAY_SIZE(bat->bix.serial) - 1] = 0;  in spwr_battery_load_bix()
183 	bat->bix.type[ARRAY_SIZE(bat->bix.type) - 1] = 0;  in spwr_battery_load_bix()
184 	bat->bix.oem_info[ARRAY_SIZE(bat->bix.oem_info) - 1] = 0;  in spwr_battery_load_bix()
189 static int spwr_battery_load_bst(struct spwr_battery_device *bat)  in spwr_battery_load_bst()  argument
191 	lockdep_assert_held(&bat->lock);  in spwr_battery_load_bst()
193 	if (!spwr_battery_present(bat))  in spwr_battery_load_bst()
196 	return ssam_retry(ssam_bat_get_bst, bat->sdev, &bat->bst);  in spwr_battery_load_bst()
199 static int spwr_battery_set_alarm_unlocked(struct spwr_battery_device *bat, u32 value)  in spwr_battery_set_alarm_unlocked()  argument
203 	lockdep_assert_held(&bat->lock);  in spwr_battery_set_alarm_unlocked()
205 	bat->alarm = value;  in spwr_battery_set_alarm_unlocked()
206 	return ssam_retry(ssam_bat_set_btp, bat->sdev, &value_le);  in spwr_battery_set_alarm_unlocked()
209 static int spwr_battery_update_bst_unlocked(struct spwr_battery_device *bat, bool cached)  in spwr_battery_update_bst_unlocked()  argument
211 	unsigned long cache_deadline = bat->timestamp + msecs_to_jiffies(cache_time);  in spwr_battery_update_bst_unlocked()
214 	lockdep_assert_held(&bat->lock);  in spwr_battery_update_bst_unlocked()
216 	if (cached && bat->timestamp && time_is_after_jiffies(cache_deadline))  in spwr_battery_update_bst_unlocked()
219 	status = spwr_battery_load_sta(bat);  in spwr_battery_update_bst_unlocked()
223 	status = spwr_battery_load_bst(bat);  in spwr_battery_update_bst_unlocked()
227 	bat->timestamp = jiffies;  in spwr_battery_update_bst_unlocked()
231 static int spwr_battery_update_bst(struct spwr_battery_device *bat, bool cached)  in spwr_battery_update_bst()  argument
235 	mutex_lock(&bat->lock);  in spwr_battery_update_bst()
236 	status = spwr_battery_update_bst_unlocked(bat, cached);  in spwr_battery_update_bst()
237 	mutex_unlock(&bat->lock);  in spwr_battery_update_bst()
242 static int spwr_battery_update_bix_unlocked(struct spwr_battery_device *bat)  in spwr_battery_update_bix_unlocked()  argument
246 	lockdep_assert_held(&bat->lock);  in spwr_battery_update_bix_unlocked()
248 	status = spwr_battery_load_sta(bat);  in spwr_battery_update_bix_unlocked()
252 	status = spwr_battery_load_bix(bat);  in spwr_battery_update_bix_unlocked()
256 	status = spwr_battery_load_bst(bat);  in spwr_battery_update_bix_unlocked()
260 	if (bat->bix.revision != SPWR_BIX_REVISION)  in spwr_battery_update_bix_unlocked()
261 		dev_warn(&bat->sdev->dev, "unsupported battery revision: %u\n", bat->bix.revision);  in spwr_battery_update_bix_unlocked()
263 	bat->timestamp = jiffies;  in spwr_battery_update_bix_unlocked()
267 static u32 sprw_battery_get_full_cap_safe(struct spwr_battery_device *bat)  in sprw_battery_get_full_cap_safe()  argument
269 	u32 full_cap = get_unaligned_le32(&bat->bix.last_full_charge_cap);  in sprw_battery_get_full_cap_safe()
271 	lockdep_assert_held(&bat->lock);  in sprw_battery_get_full_cap_safe()
274 		full_cap = get_unaligned_le32(&bat->bix.design_cap);  in sprw_battery_get_full_cap_safe()
279 static bool spwr_battery_is_full(struct spwr_battery_device *bat)  in spwr_battery_is_full()  argument
281 	u32 state = get_unaligned_le32(&bat->bst.state);  in spwr_battery_is_full()
282 	u32 full_cap = sprw_battery_get_full_cap_safe(bat);  in spwr_battery_is_full()
283 	u32 remaining_cap = get_unaligned_le32(&bat->bst.remaining_cap);  in spwr_battery_is_full()
285 	lockdep_assert_held(&bat->lock);  in spwr_battery_is_full()
293 static int spwr_battery_recheck_full(struct spwr_battery_device *bat)  in spwr_battery_recheck_full()  argument
299 	mutex_lock(&bat->lock);  in spwr_battery_recheck_full()
300 	unit = get_unaligned_le32(&bat->bix.power_unit);  in spwr_battery_recheck_full()
301 	present = spwr_battery_present(bat);  in spwr_battery_recheck_full()
303 	status = spwr_battery_update_bix_unlocked(bat);  in spwr_battery_recheck_full()
308 	if (!present && spwr_battery_present(bat)) {  in spwr_battery_recheck_full()
309 		u32 cap_warn = get_unaligned_le32(&bat->bix.design_cap_warn);  in spwr_battery_recheck_full()
311 		status = spwr_battery_set_alarm_unlocked(bat, cap_warn);  in spwr_battery_recheck_full()
321 	WARN_ON(unit != get_unaligned_le32(&bat->bix.power_unit));  in spwr_battery_recheck_full()
324 	mutex_unlock(&bat->lock);  in spwr_battery_recheck_full()
327 		power_supply_changed(bat->psy);  in spwr_battery_recheck_full()
332 static int spwr_battery_recheck_status(struct spwr_battery_device *bat)  in spwr_battery_recheck_status()  argument
336 	status = spwr_battery_update_bst(bat, false);  in spwr_battery_recheck_status()
338 		power_supply_changed(bat->psy);  in spwr_battery_recheck_status()
345 	struct spwr_battery_device *bat = container_of(nf, struct spwr_battery_device, notif);  in spwr_notify_bat()  local
355 	if (event->instance_id != bat->sdev->uid.instance)  in spwr_notify_bat()
358 	dev_dbg(&bat->sdev->dev, "power event (cid = %#04x, iid = %#04x, tid = %#04x)\n",  in spwr_notify_bat()
363 		status = spwr_battery_recheck_full(bat);  in spwr_notify_bat()
367 		status = spwr_battery_recheck_status(bat);  in spwr_notify_bat()
395 	struct spwr_battery_device *bat;  in spwr_battery_update_bst_workfn()  local
398 	bat = container_of(dwork, struct spwr_battery_device, update_work);  in spwr_battery_update_bst_workfn()
400 	status = spwr_battery_update_bst(bat, false);  in spwr_battery_update_bst_workfn()
402 		dev_err(&bat->sdev->dev, "failed to update battery state: %d\n", status);  in spwr_battery_update_bst_workfn()
406 	power_supply_changed(bat->psy);  in spwr_battery_update_bst_workfn()
411 	struct spwr_battery_device *bat = power_supply_get_drvdata(psy);  in spwr_external_power_changed()  local
422 	schedule_delayed_work(&bat->update_work, SPWR_AC_BAT_UPDATE_DELAY);  in spwr_external_power_changed()
464 static int spwr_battery_prop_status(struct spwr_battery_device *bat)  in spwr_battery_prop_status()  argument
466 	u32 state = get_unaligned_le32(&bat->bst.state);  in spwr_battery_prop_status()
467 	u32 present_rate = get_unaligned_le32(&bat->bst.present_rate);  in spwr_battery_prop_status()
469 	lockdep_assert_held(&bat->lock);  in spwr_battery_prop_status()
477 	if (spwr_battery_is_full(bat))  in spwr_battery_prop_status()
486 static int spwr_battery_prop_technology(struct spwr_battery_device *bat)  in spwr_battery_prop_technology()  argument
488 	lockdep_assert_held(&bat->lock);  in spwr_battery_prop_technology()
490 	if (!strcasecmp("NiCd", bat->bix.type))  in spwr_battery_prop_technology()
493 	if (!strcasecmp("NiMH", bat->bix.type))  in spwr_battery_prop_technology()
496 	if (!strcasecmp("LION", bat->bix.type))  in spwr_battery_prop_technology()
499 	if (!strncasecmp("LI-ION", bat->bix.type, 6))  in spwr_battery_prop_technology()
502 	if (!strcasecmp("LiP", bat->bix.type))  in spwr_battery_prop_technology()
508 static int spwr_battery_prop_capacity(struct spwr_battery_device *bat)  in spwr_battery_prop_capacity()  argument
510 	u32 full_cap = sprw_battery_get_full_cap_safe(bat);  in spwr_battery_prop_capacity()
511 	u32 remaining_cap = get_unaligned_le32(&bat->bst.remaining_cap);  in spwr_battery_prop_capacity()
513 	lockdep_assert_held(&bat->lock);  in spwr_battery_prop_capacity()
524 static int spwr_battery_prop_capacity_level(struct spwr_battery_device *bat)  in spwr_battery_prop_capacity_level()  argument
526 	u32 state = get_unaligned_le32(&bat->bst.state);  in spwr_battery_prop_capacity_level()
527 	u32 remaining_cap = get_unaligned_le32(&bat->bst.remaining_cap);  in spwr_battery_prop_capacity_level()
529 	lockdep_assert_held(&bat->lock);  in spwr_battery_prop_capacity_level()
534 	if (spwr_battery_is_full(bat))  in spwr_battery_prop_capacity_level()
537 	if (remaining_cap <= bat->alarm)  in spwr_battery_prop_capacity_level()
546 	struct spwr_battery_device *bat = power_supply_get_drvdata(psy);  in spwr_battery_get_property()  local
550 	mutex_lock(&bat->lock);  in spwr_battery_get_property()
552 	status = spwr_battery_update_bst_unlocked(bat, true);  in spwr_battery_get_property()
557 	if (!spwr_battery_present(bat) && psp != POWER_SUPPLY_PROP_PRESENT) {  in spwr_battery_get_property()
564 		val->intval = spwr_battery_prop_status(bat);  in spwr_battery_get_property()
568 		val->intval = spwr_battery_present(bat);  in spwr_battery_get_property()
572 		val->intval = spwr_battery_prop_technology(bat);  in spwr_battery_get_property()
576 		value = get_unaligned_le32(&bat->bix.cycle_count);  in spwr_battery_get_property()
584 		value = get_unaligned_le32(&bat->bix.design_voltage);  in spwr_battery_get_property()
592 		value = get_unaligned_le32(&bat->bst.present_voltage);  in spwr_battery_get_property()
601 		value = get_unaligned_le32(&bat->bst.present_rate);  in spwr_battery_get_property()
610 		value = get_unaligned_le32(&bat->bix.design_cap);  in spwr_battery_get_property()
619 		value = get_unaligned_le32(&bat->bix.last_full_charge_cap);  in spwr_battery_get_property()
628 		value = get_unaligned_le32(&bat->bst.remaining_cap);  in spwr_battery_get_property()
636 		val->intval = spwr_battery_prop_capacity(bat);  in spwr_battery_get_property()
640 		val->intval = spwr_battery_prop_capacity_level(bat);  in spwr_battery_get_property()
644 		val->strval = bat->bix.model;  in spwr_battery_get_property()
648 		val->strval = bat->bix.oem_info;  in spwr_battery_get_property()
652 		val->strval = bat->bix.serial;  in spwr_battery_get_property()
661 	mutex_unlock(&bat->lock);  in spwr_battery_get_property()
671 	struct spwr_battery_device *bat = power_supply_get_drvdata(psy);  in alarm_show()  local
674 	mutex_lock(&bat->lock);  in alarm_show()
675 	status = sysfs_emit(buf, "%d\n", bat->alarm * 1000);  in alarm_show()
676 	mutex_unlock(&bat->lock);  in alarm_show()
685 	struct spwr_battery_device *bat = power_supply_get_drvdata(psy);  in alarm_store()  local
693 	mutex_lock(&bat->lock);  in alarm_store()
695 	if (!spwr_battery_present(bat)) {  in alarm_store()
696 		mutex_unlock(&bat->lock);  in alarm_store()
700 	status = spwr_battery_set_alarm_unlocked(bat, value / 1000);  in alarm_store()
702 		mutex_unlock(&bat->lock);  in alarm_store()
706 	mutex_unlock(&bat->lock);  in alarm_store()
721 static void spwr_battery_init(struct spwr_battery_device *bat, struct ssam_device *sdev,  in spwr_battery_init()  argument
724 	mutex_init(&bat->lock);  in spwr_battery_init()
725 	strncpy(bat->name, name, ARRAY_SIZE(bat->name) - 1);  in spwr_battery_init()
727 	bat->sdev = sdev;  in spwr_battery_init()
729 	bat->notif.base.priority = 1;  in spwr_battery_init()
730 	bat->notif.base.fn = spwr_notify_bat;  in spwr_battery_init()
731 	bat->notif.event.reg = registry;  in spwr_battery_init()
732 	bat->notif.event.id.target_category = sdev->uid.category;  in spwr_battery_init()
733 	bat->notif.event.id.instance = 0;	/* need to register with instance 0 */  in spwr_battery_init()
734 	bat->notif.event.mask = SSAM_EVENT_MASK_TARGET;  in spwr_battery_init()
735 	bat->notif.event.flags = SSAM_EVENT_SEQUENCED;  in spwr_battery_init()
737 	bat->psy_desc.name = bat->name;  in spwr_battery_init()
738 	bat->psy_desc.type = POWER_SUPPLY_TYPE_BATTERY;  in spwr_battery_init()
739 	bat->psy_desc.get_property = spwr_battery_get_property;  in spwr_battery_init()
741 	INIT_DELAYED_WORK(&bat->update_work, spwr_battery_update_bst_workfn);  in spwr_battery_init()
744 static int spwr_battery_register(struct spwr_battery_device *bat)  in spwr_battery_register()  argument
751 	status = ssam_retry(ssam_bat_get_sta, bat->sdev, &sta);  in spwr_battery_register()
759 	mutex_lock(&bat->lock);  in spwr_battery_register()
761 	status = spwr_battery_update_bix_unlocked(bat);  in spwr_battery_register()
763 		mutex_unlock(&bat->lock);  in spwr_battery_register()
767 	if (spwr_battery_present(bat)) {  in spwr_battery_register()
768 		u32 cap_warn = get_unaligned_le32(&bat->bix.design_cap_warn);  in spwr_battery_register()
770 		status = spwr_battery_set_alarm_unlocked(bat, cap_warn);  in spwr_battery_register()
772 			mutex_unlock(&bat->lock);  in spwr_battery_register()
777 	mutex_unlock(&bat->lock);  in spwr_battery_register()
779 	bat->psy_desc.external_power_changed = spwr_external_power_changed;  in spwr_battery_register()
781 	switch (get_unaligned_le32(&bat->bix.power_unit)) {  in spwr_battery_register()
783 		bat->psy_desc.properties = spwr_battery_props_eng;  in spwr_battery_register()
784 		bat->psy_desc.num_properties = ARRAY_SIZE(spwr_battery_props_eng);  in spwr_battery_register()
788 		bat->psy_desc.properties = spwr_battery_props_chg;  in spwr_battery_register()
789 		bat->psy_desc.num_properties = ARRAY_SIZE(spwr_battery_props_chg);  in spwr_battery_register()
793 		dev_err(&bat->sdev->dev, "unsupported battery power unit: %u\n",  in spwr_battery_register()
794 			get_unaligned_le32(&bat->bix.power_unit));  in spwr_battery_register()
798 	psy_cfg.drv_data = bat;  in spwr_battery_register()
801 	bat->psy = devm_power_supply_register(&bat->sdev->dev, &bat->psy_desc, &psy_cfg);  in spwr_battery_register()
802 	if (IS_ERR(bat->psy))  in spwr_battery_register()
803 		return PTR_ERR(bat->psy);  in spwr_battery_register()
805 	return ssam_device_notifier_register(bat->sdev, &bat->notif);  in spwr_battery_register()
820 	struct spwr_battery_device *bat;  in surface_battery_probe()  local
826 	bat = devm_kzalloc(&sdev->dev, sizeof(*bat), GFP_KERNEL);  in surface_battery_probe()
827 	if (!bat)  in surface_battery_probe()
830 	spwr_battery_init(bat, sdev, p->registry, p->name);  in surface_battery_probe()
831 	ssam_device_set_drvdata(sdev, bat);  in surface_battery_probe()
833 	return spwr_battery_register(bat);  in surface_battery_probe()
838 	struct spwr_battery_device *bat = ssam_device_get_drvdata(sdev);  in surface_battery_remove()  local
840 	ssam_device_notifier_unregister(sdev, &bat->notif);  in surface_battery_remove()
841 	cancel_delayed_work_sync(&bat->update_work);  in surface_battery_remove()
855 	{ SSAM_SDEV(BAT, SAM, 0x01, 0x00), (unsigned long)&spwr_psy_props_bat1     },
856 	{ SSAM_SDEV(BAT, KIP, 0x01, 0x00), (unsigned long)&spwr_psy_props_bat2_sb3 },