[deliverable/linux.git] / drivers / staging / nvec / nvec_power.c

/*
 * nvec_power: power supply driver for a NVIDIA compliant embedded controller
 *
 * Copyright (C) 2011 The AC100 Kernel Team <ac100@lists.launchpad.net>
 *
 * Authors:  Ilya Petrov <ilya.muromec@gmail.com>
 *           Marc Dietrich <marvin24@gmx.de>
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/power_supply.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <linux/delay.h>

#include "nvec.h"

#define GET_SYSTEM_STATUS 0x00

struct nvec_power {
	struct notifier_block notifier;
	struct delayed_work poller;
	struct nvec_chip *nvec;
	int on;
	int bat_present;
	int bat_status;
	int bat_voltage_now;
	int bat_current_now;
	int bat_current_avg;
	int time_remain;
	int charge_full_design;
	int charge_last_full;
	int critical_capacity;
	int capacity_remain;
	int bat_temperature;
	int bat_cap;
	int bat_type_enum;
	char bat_manu[30];
	char bat_model[30];
	char bat_type[30];
};

enum {
	SLOT_STATUS,
	VOLTAGE,
	TIME_REMAINING,
	CURRENT,
	AVERAGE_CURRENT,
	AVERAGING_TIME_INTERVAL,
	CAPACITY_REMAINING,
	LAST_FULL_CHARGE_CAPACITY,
	DESIGN_CAPACITY,
	CRITICAL_CAPACITY,
	TEMPERATURE,
	MANUFACTURER,
	MODEL,
	TYPE,
};

enum {
	AC,
	BAT,
};

struct bat_response {
	u8 event_type;
	u8 length;
	u8 sub_type;
	u8 status;
	/* payload */
	union {
		char plc[30];
		u16 plu;
		s16 pls;
	};
};

static struct power_supply *nvec_bat_psy;
static struct power_supply *nvec_psy;

static int nvec_power_notifier(struct notifier_block *nb,
			       unsigned long event_type, void *data)
{
	struct nvec_power *power =
	    container_of(nb, struct nvec_power, notifier);
	struct bat_response *res = (struct bat_response *)data;

	if (event_type != NVEC_SYS)
		return NOTIFY_DONE;

	if (res->sub_type == 0) {
		if (power->on != res->plu) {
			power->on = res->plu;
			power_supply_changed(nvec_psy);
		}
		return NOTIFY_STOP;
	}
	return NOTIFY_OK;
}

static const int bat_init[] = {
	LAST_FULL_CHARGE_CAPACITY, DESIGN_CAPACITY, CRITICAL_CAPACITY,
	MANUFACTURER, MODEL, TYPE,
};

static void get_bat_mfg_data(struct nvec_power *power)
{
	int i;
	char buf[] = { NVEC_BAT, SLOT_STATUS };

	for (i = 0; i < ARRAY_SIZE(bat_init); i++) {
		buf[1] = bat_init[i];
		nvec_write_async(power->nvec, buf, 2);
	}
}

static int nvec_power_bat_notifier(struct notifier_block *nb,
				   unsigned long event_type, void *data)
{
	struct nvec_power *power =
	    container_of(nb, struct nvec_power, notifier);
	struct bat_response *res = (struct bat_response *)data;
	int status_changed = 0;

	if (event_type != NVEC_BAT)
		return NOTIFY_DONE;

	switch (res->sub_type) {
	case SLOT_STATUS:
		if (res->plc[0] & 1) {
			if (power->bat_present == 0) {
				status_changed = 1;
				get_bat_mfg_data(power);
			}

			power->bat_present = 1;

			switch ((res->plc[0] >> 1) & 3) {
			case 0:
				power->bat_status =
				    POWER_SUPPLY_STATUS_NOT_CHARGING;
				break;
			case 1:
				power->bat_status =
				    POWER_SUPPLY_STATUS_CHARGING;
				break;
			case 2:
				power->bat_status =
				    POWER_SUPPLY_STATUS_DISCHARGING;
				break;
			default:
				power->bat_status = POWER_SUPPLY_STATUS_UNKNOWN;
			}
		} else {
			if (power->bat_present == 1)
				status_changed = 1;

			power->bat_present = 0;
			power->bat_status = POWER_SUPPLY_STATUS_UNKNOWN;
		}
		power->bat_cap = res->plc[1];
		if (status_changed)
			power_supply_changed(nvec_bat_psy);
		break;
	case VOLTAGE:
		power->bat_voltage_now = res->plu * 1000;
		break;
	case TIME_REMAINING:
		power->time_remain = res->plu * 3600;
		break;
	case CURRENT:
		power->bat_current_now = res->pls * 1000;
		break;
	case AVERAGE_CURRENT:
		power->bat_current_avg = res->pls * 1000;
		break;
	case CAPACITY_REMAINING:
		power->capacity_remain = res->plu * 1000;
		break;
	case LAST_FULL_CHARGE_CAPACITY:
		power->charge_last_full = res->plu * 1000;
		break;
	case DESIGN_CAPACITY:
		power->charge_full_design = res->plu * 1000;
		break;
	case CRITICAL_CAPACITY:
		power->critical_capacity = res->plu * 1000;
		break;
	case TEMPERATURE:
		power->bat_temperature = res->plu - 2732;
		break;
	case MANUFACTURER:
		memcpy(power->bat_manu, &res->plc, res->length - 2);
		power->bat_model[res->length - 2] = '\0';
		break;
	case MODEL:
		memcpy(power->bat_model, &res->plc, res->length - 2);
		power->bat_model[res->length - 2] = '\0';
		break;
	case TYPE:
		memcpy(power->bat_type, &res->plc, res->length - 2);
		power->bat_type[res->length - 2] = '\0';
		/* this differs a little from the spec
		   fill in more if you find some */
		if (!strncmp(power->bat_type, "Li", 30))
			power->bat_type_enum = POWER_SUPPLY_TECHNOLOGY_LION;
		else
			power->bat_type_enum = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
		break;
	default:
		return NOTIFY_STOP;
	}

	return NOTIFY_STOP;
}

static int nvec_power_get_property(struct power_supply *psy,
				   enum power_supply_property psp,
				   union power_supply_propval *val)
{
	struct nvec_power *power = dev_get_drvdata(psy->dev.parent);

	switch (psp) {
	case POWER_SUPPLY_PROP_ONLINE:
		val->intval = power->on;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static int nvec_battery_get_property(struct power_supply *psy,
				     enum power_supply_property psp,
				     union power_supply_propval *val)
{
	struct nvec_power *power = dev_get_drvdata(psy->dev.parent);

	switch (psp) {
	case POWER_SUPPLY_PROP_STATUS:
		val->intval = power->bat_status;
		break;
	case POWER_SUPPLY_PROP_CAPACITY:
		val->intval = power->bat_cap;
		break;
	case POWER_SUPPLY_PROP_PRESENT:
		val->intval = power->bat_present;
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
		val->intval = power->bat_voltage_now;
		break;
	case POWER_SUPPLY_PROP_CURRENT_NOW:
		val->intval = power->bat_current_now;
		break;
	case POWER_SUPPLY_PROP_CURRENT_AVG:
		val->intval = power->bat_current_avg;
		break;
	case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
		val->intval = power->time_remain;
		break;
	case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
		val->intval = power->charge_full_design;
		break;
	case POWER_SUPPLY_PROP_CHARGE_FULL:
		val->intval = power->charge_last_full;
		break;
	case POWER_SUPPLY_PROP_CHARGE_EMPTY:
		val->intval = power->critical_capacity;
		break;
	case POWER_SUPPLY_PROP_CHARGE_NOW:
		val->intval = power->capacity_remain;
		break;
	case POWER_SUPPLY_PROP_TEMP:
		val->intval = power->bat_temperature;
		break;
	case POWER_SUPPLY_PROP_MANUFACTURER:
		val->strval = power->bat_manu;
		break;
	case POWER_SUPPLY_PROP_MODEL_NAME:
		val->strval = power->bat_model;
		break;
	case POWER_SUPPLY_PROP_TECHNOLOGY:
		val->intval = power->bat_type_enum;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

static enum power_supply_property nvec_power_props[] = {
	POWER_SUPPLY_PROP_ONLINE,
};

static enum power_supply_property nvec_battery_props[] = {
	POWER_SUPPLY_PROP_STATUS,
	POWER_SUPPLY_PROP_PRESENT,
	POWER_SUPPLY_PROP_CAPACITY,
	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	POWER_SUPPLY_PROP_CURRENT_NOW,
#ifdef EC_FULL_DIAG
	POWER_SUPPLY_PROP_CURRENT_AVG,
	POWER_SUPPLY_PROP_TEMP,
	POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
#endif
	POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
	POWER_SUPPLY_PROP_CHARGE_FULL,
	POWER_SUPPLY_PROP_CHARGE_EMPTY,
	POWER_SUPPLY_PROP_CHARGE_NOW,
	POWER_SUPPLY_PROP_MANUFACTURER,
	POWER_SUPPLY_PROP_MODEL_NAME,
	POWER_SUPPLY_PROP_TECHNOLOGY,
};

static char *nvec_power_supplied_to[] = {
	"battery",
};

static const struct power_supply_desc nvec_bat_psy_desc = {
	.name = "battery",
	.type = POWER_SUPPLY_TYPE_BATTERY,
	.properties = nvec_battery_props,
	.num_properties = ARRAY_SIZE(nvec_battery_props),
	.get_property = nvec_battery_get_property,
};

static const struct power_supply_desc nvec_psy_desc = {
	.name = "ac",
	.type = POWER_SUPPLY_TYPE_MAINS,
	.properties = nvec_power_props,
	.num_properties = ARRAY_SIZE(nvec_power_props),
	.get_property = nvec_power_get_property,
};

static int counter;
static int const bat_iter[] = {
	SLOT_STATUS, VOLTAGE, CURRENT, CAPACITY_REMAINING,
#ifdef EC_FULL_DIAG
	AVERAGE_CURRENT, TEMPERATURE, TIME_REMAINING,
#endif
};

static void nvec_power_poll(struct work_struct *work)
{
	char buf[] = { NVEC_SYS, GET_SYSTEM_STATUS };
	struct nvec_power *power = container_of(work, struct nvec_power,
						poller.work);

	if (counter >= ARRAY_SIZE(bat_iter))
		counter = 0;

/* AC status via sys req */
	nvec_write_async(power->nvec, buf, 2);
	msleep(100);

/* select a battery request function via round robin
   doing it all at once seems to overload the power supply */
	buf[0] = NVEC_BAT;
	buf[1] = bat_iter[counter++];
	nvec_write_async(power->nvec, buf, 2);

	schedule_delayed_work(to_delayed_work(work), msecs_to_jiffies(5000));
};

static int nvec_power_probe(struct platform_device *pdev)
{
	struct power_supply **psy;
	const struct power_supply_desc *psy_desc;
	struct nvec_power *power;
	struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);
	struct power_supply_config psy_cfg = {};

	power = devm_kzalloc(&pdev->dev, sizeof(struct nvec_power), GFP_NOWAIT);
	if (!power)
		return -ENOMEM;

	dev_set_drvdata(&pdev->dev, power);
	power->nvec = nvec;

	switch (pdev->id) {
	case AC:
		psy = &nvec_psy;
		psy_desc = &nvec_psy_desc;
		psy_cfg.supplied_to = nvec_power_supplied_to;
		psy_cfg.num_supplicants = ARRAY_SIZE(nvec_power_supplied_to);

		power->notifier.notifier_call = nvec_power_notifier;

		INIT_DELAYED_WORK(&power->poller, nvec_power_poll);
		schedule_delayed_work(&power->poller, msecs_to_jiffies(5000));
		break;
	case BAT:
		psy = &nvec_bat_psy;
		psy_desc = &nvec_bat_psy_desc;

		power->notifier.notifier_call = nvec_power_bat_notifier;
		break;
	default:
		return -ENODEV;
	}

	nvec_register_notifier(nvec, &power->notifier, NVEC_SYS);

	if (pdev->id == BAT)
		get_bat_mfg_data(power);

	*psy = power_supply_register(&pdev->dev, psy_desc, &psy_cfg);

	return PTR_ERR_OR_ZERO(*psy);
}

static int nvec_power_remove(struct platform_device *pdev)
{
	struct nvec_power *power = platform_get_drvdata(pdev);

	cancel_delayed_work_sync(&power->poller);
	nvec_unregister_notifier(power->nvec, &power->notifier);
	switch (pdev->id) {
	case AC:
		power_supply_unregister(nvec_psy);
		break;
	case BAT:
		power_supply_unregister(nvec_bat_psy);
	}

	return 0;
}

static struct platform_driver nvec_power_driver = {
	.probe = nvec_power_probe,
	.remove = nvec_power_remove,
	.driver = {
		   .name = "nvec-power",
		   }
};

module_platform_driver(nvec_power_driver);

MODULE_AUTHOR("Ilya Petrov <ilya.muromec@gmail.com>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("NVEC battery and AC driver");
MODULE_ALIAS("platform:nvec-power");
Commit	Line	Data
162c7d8c MD	1	/*
	2	* nvec_power: power supply driver for a NVIDIA compliant embedded controller
	3	*
	4	* Copyright (C) 2011 The AC100 Kernel Team <ac100@lists.launchpad.net>
	5	*
	6	* Authors: Ilya Petrov <ilya.muromec@gmail.com>
	7	* Marc Dietrich <marvin24@gmx.de>
	8	*
	9	* This file is subject to the terms and conditions of the GNU General Public
	10	* License. See the file "COPYING" in the main directory of this archive
	11	* for more details.
	12	*
	13	*/
	14
32890b98 MD	15	#include <linux/module.h>
	16	#include <linux/platform_device.h>
	17	#include <linux/err.h>
	18	#include <linux/power_supply.h>
	19	#include <linux/slab.h>
	20	#include <linux/workqueue.h>
	21	#include <linux/delay.h>
162c7d8c	22
32890b98 MD	23	#include "nvec.h"
32890b98 MD	24
93eff83f MD	25	#define GET_SYSTEM_STATUS 0x00
93eff83f MD	26
162c7d8c	27	struct nvec_power {
32890b98 MD	28	struct notifier_block notifier;
	29	struct delayed_work poller;
	30	struct nvec_chip *nvec;
	31	int on;
	32	int bat_present;
	33	int bat_status;
	34	int bat_voltage_now;
	35	int bat_current_now;
	36	int bat_current_avg;
	37	int time_remain;
	38	int charge_full_design;
	39	int charge_last_full;
	40	int critical_capacity;
	41	int capacity_remain;
	42	int bat_temperature;
	43	int bat_cap;
	44	int bat_type_enum;
	45	char bat_manu[30];
	46	char bat_model[30];
	47	char bat_type[30];
	48	};
	49
	50	enum {
	51	SLOT_STATUS,
	52	VOLTAGE,
	53	TIME_REMAINING,
	54	CURRENT,
	55	AVERAGE_CURRENT,
	56	AVERAGING_TIME_INTERVAL,
	57	CAPACITY_REMAINING,
	58	LAST_FULL_CHARGE_CAPACITY,
	59	DESIGN_CAPACITY,
	60	CRITICAL_CAPACITY,
	61	TEMPERATURE,
	62	MANUFACTURER,
	63	MODEL,
	64	TYPE,
	65	};
	66
	67	enum {
	68	AC,
	69	BAT,
	70	};
	71
	72	struct bat_response {
	73	u8 event_type;
	74	u8 length;
	75	u8 sub_type;
	76	u8 status;
162c7d8c MD	77	/* payload */
162c7d8c MD	78	union {
32890b98 MD	79	char plc[30];
	80	u16 plu;
	81	s16 pls;
	82	};
	83	};
	84
297d716f KK	85	static struct power_supply *nvec_bat_psy;
297d716f KK	86	static struct power_supply *nvec_psy;
32890b98 MD	87
32890b98 MD	88	static int nvec_power_notifier(struct notifier_block *nb,
162c7d8c	89	unsigned long event_type, void *data)
32890b98	90	{
162c7d8c MD	91	struct nvec_power *power =
162c7d8c MD	92	container_of(nb, struct nvec_power, notifier);
32890b98 MD	93	struct bat_response res = (struct bat_response )data;
	94
	95	if (event_type != NVEC_SYS)
	96	return NOTIFY_DONE;
	97
162c7d8c MD	98	if (res->sub_type == 0) {
162c7d8c MD	99	if (power->on != res->plu) {
32890b98	100	power->on = res->plu;
297d716f	101	power_supply_changed(nvec_psy);
32890b98 MD	102	}
	103	return NOTIFY_STOP;
	104	}
	105	return NOTIFY_OK;
	106	}
	107
162c7d8c	108	static const int bat_init[] = {
32890b98 MD	109	LAST_FULL_CHARGE_CAPACITY, DESIGN_CAPACITY, CRITICAL_CAPACITY,
	110	MANUFACTURER, MODEL, TYPE,
	111	};
	112
	113	static void get_bat_mfg_data(struct nvec_power *power)
	114	{
	115	int i;
93eff83f	116	char buf[] = { NVEC_BAT, SLOT_STATUS };
32890b98	117
162c7d8c	118	for (i = 0; i < ARRAY_SIZE(bat_init); i++) {
32890b98 MD	119	buf[1] = bat_init[i];
	120	nvec_write_async(power->nvec, buf, 2);
	121	}
	122	}
	123
	124	static int nvec_power_bat_notifier(struct notifier_block *nb,
162c7d8c	125	unsigned long event_type, void *data)
32890b98	126	{
162c7d8c MD	127	struct nvec_power *power =
162c7d8c MD	128	container_of(nb, struct nvec_power, notifier);
32890b98 MD	129	struct bat_response res = (struct bat_response )data;
	130	int status_changed = 0;
	131
	132	if (event_type != NVEC_BAT)
	133	return NOTIFY_DONE;
	134
162c7d8c MD	135	switch (res->sub_type) {
	136	case SLOT_STATUS:
	137	if (res->plc[0] & 1) {
	138	if (power->bat_present == 0) {
	139	status_changed = 1;
	140	get_bat_mfg_data(power);
	141	}
	142
	143	power->bat_present = 1;
	144
	145	switch ((res->plc[0] >> 1) & 3) {
	146	case 0:
	147	power->bat_status =
	148	POWER_SUPPLY_STATUS_NOT_CHARGING;
	149	break;
	150	case 1:
	151	power->bat_status =
	152	POWER_SUPPLY_STATUS_CHARGING;
	153	break;
	154	case 2:
	155	power->bat_status =
	156	POWER_SUPPLY_STATUS_DISCHARGING;
	157	break;
	158	default:
32890b98 MD	159	power->bat_status = POWER_SUPPLY_STATUS_UNKNOWN;
32890b98 MD	160	}
162c7d8c MD	161	} else {
	162	if (power->bat_present == 1)
	163	status_changed = 1;
	164
	165	power->bat_present = 0;
	166	power->bat_status = POWER_SUPPLY_STATUS_UNKNOWN;
	167	}
	168	power->bat_cap = res->plc[1];
	169	if (status_changed)
297d716f	170	power_supply_changed(nvec_bat_psy);
162c7d8c MD	171	break;
	172	case VOLTAGE:
	173	power->bat_voltage_now = res->plu * 1000;
	174	break;
	175	case TIME_REMAINING:
	176	power->time_remain = res->plu * 3600;
	177	break;
	178	case CURRENT:
	179	power->bat_current_now = res->pls * 1000;
	180	break;
	181	case AVERAGE_CURRENT:
	182	power->bat_current_avg = res->pls * 1000;
	183	break;
	184	case CAPACITY_REMAINING:
	185	power->capacity_remain = res->plu * 1000;
	186	break;
	187	case LAST_FULL_CHARGE_CAPACITY:
	188	power->charge_last_full = res->plu * 1000;
	189	break;
	190	case DESIGN_CAPACITY:
	191	power->charge_full_design = res->plu * 1000;
	192	break;
	193	case CRITICAL_CAPACITY:
	194	power->critical_capacity = res->plu * 1000;
	195	break;
	196	case TEMPERATURE:
	197	power->bat_temperature = res->plu - 2732;
	198	break;
	199	case MANUFACTURER:
	200	memcpy(power->bat_manu, &res->plc, res->length - 2);
	201	power->bat_model[res->length - 2] = '\0';
	202	break;
	203	case MODEL:
	204	memcpy(power->bat_model, &res->plc, res->length - 2);
	205	power->bat_model[res->length - 2] = '\0';
	206	break;
	207	case TYPE:
	208	memcpy(power->bat_type, &res->plc, res->length - 2);
	209	power->bat_type[res->length - 2] = '\0';
	210	/* this differs a little from the spec
	211	fill in more if you find some */
	212	if (!strncmp(power->bat_type, "Li", 30))
	213	power->bat_type_enum = POWER_SUPPLY_TECHNOLOGY_LION;
	214	else
	215	power->bat_type_enum = POWER_SUPPLY_TECHNOLOGY_UNKNOWN;
	216	break;
	217	default:
	218	return NOTIFY_STOP;
32890b98 MD	219	}
	220
	221	return NOTIFY_STOP;
	222	}
	223
	224	static int nvec_power_get_property(struct power_supply *psy,
162c7d8c MD	225	enum power_supply_property psp,
162c7d8c MD	226	union power_supply_propval *val)
32890b98	227	{
297d716f	228	struct nvec_power *power = dev_get_drvdata(psy->dev.parent);
fa799617	229
32890b98 MD	230	switch (psp) {
	231	case POWER_SUPPLY_PROP_ONLINE:
	232	val->intval = power->on;
	233	break;
	234	default:
	235	return -EINVAL;
	236	}
	237	return 0;
	238	}
	239
	240	static int nvec_battery_get_property(struct power_supply *psy,
162c7d8c MD	241	enum power_supply_property psp,
162c7d8c MD	242	union power_supply_propval *val)
32890b98	243	{
297d716f	244	struct nvec_power *power = dev_get_drvdata(psy->dev.parent);
32890b98	245
162c7d8c MD	246	switch (psp) {
	247	case POWER_SUPPLY_PROP_STATUS:
	248	val->intval = power->bat_status;
	249	break;
	250	case POWER_SUPPLY_PROP_CAPACITY:
	251	val->intval = power->bat_cap;
	252	break;
	253	case POWER_SUPPLY_PROP_PRESENT:
	254	val->intval = power->bat_present;
	255	break;
	256	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
	257	val->intval = power->bat_voltage_now;
	258	break;
	259	case POWER_SUPPLY_PROP_CURRENT_NOW:
	260	val->intval = power->bat_current_now;
	261	break;
	262	case POWER_SUPPLY_PROP_CURRENT_AVG:
	263	val->intval = power->bat_current_avg;
	264	break;
	265	case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
	266	val->intval = power->time_remain;
	267	break;
	268	case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
	269	val->intval = power->charge_full_design;
	270	break;
	271	case POWER_SUPPLY_PROP_CHARGE_FULL:
	272	val->intval = power->charge_last_full;
	273	break;
	274	case POWER_SUPPLY_PROP_CHARGE_EMPTY:
	275	val->intval = power->critical_capacity;
	276	break;
	277	case POWER_SUPPLY_PROP_CHARGE_NOW:
	278	val->intval = power->capacity_remain;
	279	break;
	280	case POWER_SUPPLY_PROP_TEMP:
	281	val->intval = power->bat_temperature;
	282	break;
	283	case POWER_SUPPLY_PROP_MANUFACTURER:
	284	val->strval = power->bat_manu;
	285	break;
	286	case POWER_SUPPLY_PROP_MODEL_NAME:
	287	val->strval = power->bat_model;
	288	break;
	289	case POWER_SUPPLY_PROP_TECHNOLOGY:
	290	val->intval = power->bat_type_enum;
	291	break;
	292	default:
	293	return -EINVAL;
	294	}
32890b98 MD	295	return 0;
	296	}
	297
	298	static enum power_supply_property nvec_power_props[] = {
	299	POWER_SUPPLY_PROP_ONLINE,
	300	};
	301
	302	static enum power_supply_property nvec_battery_props[] = {
	303	POWER_SUPPLY_PROP_STATUS,
	304	POWER_SUPPLY_PROP_PRESENT,
	305	POWER_SUPPLY_PROP_CAPACITY,
	306	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	307	POWER_SUPPLY_PROP_CURRENT_NOW,
	308	#ifdef EC_FULL_DIAG
	309	POWER_SUPPLY_PROP_CURRENT_AVG,
	310	POWER_SUPPLY_PROP_TEMP,
	311	POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
	312	#endif
	313	POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
	314	POWER_SUPPLY_PROP_CHARGE_FULL,
	315	POWER_SUPPLY_PROP_CHARGE_EMPTY,
	316	POWER_SUPPLY_PROP_CHARGE_NOW,
	317	POWER_SUPPLY_PROP_MANUFACTURER,
	318	POWER_SUPPLY_PROP_MODEL_NAME,
	319	POWER_SUPPLY_PROP_TECHNOLOGY,
	320	};
	321
	322	static char *nvec_power_supplied_to[] = {
	323	"battery",
	324	};
	325
297d716f	326	static const struct power_supply_desc nvec_bat_psy_desc = {
162c7d8c MD	327	.name = "battery",
	328	.type = POWER_SUPPLY_TYPE_BATTERY,
	329	.properties = nvec_battery_props,
	330	.num_properties = ARRAY_SIZE(nvec_battery_props),
	331	.get_property = nvec_battery_get_property,
32890b98 MD	332	};
32890b98 MD	333
297d716f	334	static const struct power_supply_desc nvec_psy_desc = {
32890b98 MD	335	.name = "ac",
32890b98 MD	336	.type = POWER_SUPPLY_TYPE_MAINS,
32890b98 MD	337	.properties = nvec_power_props,
	338	.num_properties = ARRAY_SIZE(nvec_power_props),
	339	.get_property = nvec_power_get_property,
	340	};
	341
162c7d8c MD	342	static int counter;
162c7d8c MD	343	static int const bat_iter[] = {
32890b98 MD	344	SLOT_STATUS, VOLTAGE, CURRENT, CAPACITY_REMAINING,
	345	#ifdef EC_FULL_DIAG
	346	AVERAGE_CURRENT, TEMPERATURE, TIME_REMAINING,
	347	#endif
	348	};
	349
	350	static void nvec_power_poll(struct work_struct *work)
	351	{
93eff83f	352	char buf[] = { NVEC_SYS, GET_SYSTEM_STATUS };
32890b98	353	struct nvec_power *power = container_of(work, struct nvec_power,
162c7d8c	354	poller.work);
32890b98 MD	355
	356	if (counter >= ARRAY_SIZE(bat_iter))
	357	counter = 0;
	358
	359	/* AC status via sys req */
	360	nvec_write_async(power->nvec, buf, 2);
	361	msleep(100);
	362
	363	/* select a battery request function via round robin
	364	doing it all at once seems to overload the power supply */
93eff83f	365	buf[0] = NVEC_BAT;
162c7d8c	366	buf[1] = bat_iter[counter++];
32890b98 MD	367	nvec_write_async(power->nvec, buf, 2);
32890b98 MD	368
32890b98 MD	369	schedule_delayed_work(to_delayed_work(work), msecs_to_jiffies(5000));
	370	};
	371
46620803	372	static int nvec_power_probe(struct platform_device *pdev)
32890b98	373	{
297d716f KK	374	struct power_supply **psy;
297d716f KK	375	const struct power_supply_desc *psy_desc;
f5e3352e	376	struct nvec_power *power;
32890b98	377	struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);
2dc9215d	378	struct power_supply_config psy_cfg = {};
32890b98	379
f5e3352e	380	power = devm_kzalloc(&pdev->dev, sizeof(struct nvec_power), GFP_NOWAIT);
4c42d979	381	if (!power)
f5e3352e MD	382	return -ENOMEM;
f5e3352e MD	383
32890b98 MD	384	dev_set_drvdata(&pdev->dev, power);
	385	power->nvec = nvec;
	386
	387	switch (pdev->id) {
	388	case AC:
	389	psy = &nvec_psy;
297d716f	390	psy_desc = &nvec_psy_desc;
2dc9215d KK	391	psy_cfg.supplied_to = nvec_power_supplied_to;
2dc9215d KK	392	psy_cfg.num_supplicants = ARRAY_SIZE(nvec_power_supplied_to);
32890b98 MD	393
	394	power->notifier.notifier_call = nvec_power_notifier;
	395
	396	INIT_DELAYED_WORK(&power->poller, nvec_power_poll);
	397	schedule_delayed_work(&power->poller, msecs_to_jiffies(5000));
	398	break;
	399	case BAT:
	400	psy = &nvec_bat_psy;
297d716f	401	psy_desc = &nvec_bat_psy_desc;
32890b98	402
162c7d8c	403	power->notifier.notifier_call = nvec_power_bat_notifier;
32890b98 MD	404	break;
32890b98 MD	405	default:
32890b98 MD	406	return -ENODEV;
	407	}
	408
	409	nvec_register_notifier(nvec, &power->notifier, NVEC_SYS);
	410
	411	if (pdev->id == BAT)
	412	get_bat_mfg_data(power);
	413
297d716f KK	414	*psy = power_supply_register(&pdev->dev, psy_desc, &psy_cfg);
	415
	416	return PTR_ERR_OR_ZERO(*psy);
32890b98 MD	417	}
32890b98 MD	418
1a6a8a84	419	static int nvec_power_remove(struct platform_device *pdev)
3cdde3a3 MD	420	{
	421	struct nvec_power *power = platform_get_drvdata(pdev);
	422
	423	cancel_delayed_work_sync(&power->poller);
c2b62f60	424	nvec_unregister_notifier(power->nvec, &power->notifier);
3cdde3a3 MD	425	switch (pdev->id) {
3cdde3a3 MD	426	case AC:
297d716f	427	power_supply_unregister(nvec_psy);
3cdde3a3 MD	428	break;
3cdde3a3 MD	429	case BAT:
297d716f	430	power_supply_unregister(nvec_bat_psy);
3cdde3a3 MD	431	}
	432
	433	return 0;
	434	}
	435
32890b98 MD	436	static struct platform_driver nvec_power_driver = {
32890b98 MD	437	.probe = nvec_power_probe,
44b90a3f	438	.remove = nvec_power_remove,
32890b98	439	.driver = {
162c7d8c	440	.name = "nvec-power",
162c7d8c	441	}
32890b98 MD	442	};
32890b98 MD	443
9891b1ce	444	module_platform_driver(nvec_power_driver);
32890b98 MD	445
	446	MODULE_AUTHOR("Ilya Petrov <ilya.muromec@gmail.com>");
	447	MODULE_LICENSE("GPL");
	448	MODULE_DESCRIPTION("NVEC battery and AC driver");
	449	MODULE_ALIAS("platform:nvec-power");