[linux-2.6-block.git] / drivers / power / pda_power.c

/*
 * Common power driver for PDAs and phones with one or two external
 * power supplies (AC/USB) connected to main and backup batteries,
 * and optional builtin charger.
 *
 * Copyright © 2007 Anton Vorontsov <cbou@mail.ru>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/notifier.h>
#include <linux/power_supply.h>
#include <linux/pda_power.h>
#include <linux/regulator/consumer.h>
#include <linux/timer.h>
#include <linux/jiffies.h>
#include <linux/usb/otg.h>

static inline unsigned int get_irq_flags(struct resource *res)
{
	return IRQF_SHARED | (res->flags & IRQF_TRIGGER_MASK);
}

static struct device *dev;
static struct pda_power_pdata *pdata;
static struct resource *ac_irq, *usb_irq;
static struct timer_list charger_timer;
static struct timer_list supply_timer;
static struct timer_list polling_timer;
static int polling;
static struct power_supply *pda_psy_ac, *pda_psy_usb;

#if IS_ENABLED(CONFIG_USB_PHY)
static struct usb_phy *transceiver;
static struct notifier_block otg_nb;
#endif

static struct regulator *ac_draw;

enum {
	PDA_PSY_OFFLINE = 0,
	PDA_PSY_ONLINE = 1,
	PDA_PSY_TO_CHANGE,
};
static int new_ac_status = -1;
static int new_usb_status = -1;
static int ac_status = -1;
static int usb_status = -1;

static int pda_power_get_property(struct power_supply *psy,
				  enum power_supply_property psp,
				  union power_supply_propval *val)
{
	switch (psp) {
	case POWER_SUPPLY_PROP_ONLINE:
		if (psy->desc->type == POWER_SUPPLY_TYPE_MAINS)
			val->intval = pdata->is_ac_online ?
				      pdata->is_ac_online() : 0;
		else
			val->intval = pdata->is_usb_online ?
				      pdata->is_usb_online() : 0;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

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

static char *pda_power_supplied_to[] = {
	"main-battery",
	"backup-battery",
};

static const struct power_supply_desc pda_psy_ac_desc = {
	.name = "ac",
	.type = POWER_SUPPLY_TYPE_MAINS,
	.properties = pda_power_props,
	.num_properties = ARRAY_SIZE(pda_power_props),
	.get_property = pda_power_get_property,
};

static const struct power_supply_desc pda_psy_usb_desc = {
	.name = "usb",
	.type = POWER_SUPPLY_TYPE_USB,
	.properties = pda_power_props,
	.num_properties = ARRAY_SIZE(pda_power_props),
	.get_property = pda_power_get_property,
};

static void update_status(void)
{
	if (pdata->is_ac_online)
		new_ac_status = !!pdata->is_ac_online();

	if (pdata->is_usb_online)
		new_usb_status = !!pdata->is_usb_online();
}

static void update_charger(void)
{
	static int regulator_enabled;
	int max_uA = pdata->ac_max_uA;

	if (pdata->set_charge) {
		if (new_ac_status > 0) {
			dev_dbg(dev, "charger on (AC)\n");
			pdata->set_charge(PDA_POWER_CHARGE_AC);
		} else if (new_usb_status > 0) {
			dev_dbg(dev, "charger on (USB)\n");
			pdata->set_charge(PDA_POWER_CHARGE_USB);
		} else {
			dev_dbg(dev, "charger off\n");
			pdata->set_charge(0);
		}
	} else if (ac_draw) {
		if (new_ac_status > 0) {
			regulator_set_current_limit(ac_draw, max_uA, max_uA);
			if (!regulator_enabled) {
				dev_dbg(dev, "charger on (AC)\n");
				WARN_ON(regulator_enable(ac_draw));
				regulator_enabled = 1;
			}
		} else {
			if (regulator_enabled) {
				dev_dbg(dev, "charger off\n");
				WARN_ON(regulator_disable(ac_draw));
				regulator_enabled = 0;
			}
		}
	}
}

static void supply_timer_func(unsigned long unused)
{
	if (ac_status == PDA_PSY_TO_CHANGE) {
		ac_status = new_ac_status;
		power_supply_changed(pda_psy_ac);
	}

	if (usb_status == PDA_PSY_TO_CHANGE) {
		usb_status = new_usb_status;
		power_supply_changed(pda_psy_usb);
	}
}

static void psy_changed(void)
{
	update_charger();

	/*
	 * Okay, charger set. Now wait a bit before notifying supplicants,
	 * charge power should stabilize.
	 */
	mod_timer(&supply_timer,
		  jiffies + msecs_to_jiffies(pdata->wait_for_charger));
}

static void charger_timer_func(unsigned long unused)
{
	update_status();
	psy_changed();
}

static irqreturn_t power_changed_isr(int irq, void *power_supply)
{
	if (power_supply == pda_psy_ac)
		ac_status = PDA_PSY_TO_CHANGE;
	else if (power_supply == pda_psy_usb)
		usb_status = PDA_PSY_TO_CHANGE;
	else
		return IRQ_NONE;

	/*
	 * Wait a bit before reading ac/usb line status and setting charger,
	 * because ac/usb status readings may lag from irq.
	 */
	mod_timer(&charger_timer,
		  jiffies + msecs_to_jiffies(pdata->wait_for_status));

	return IRQ_HANDLED;
}

static void polling_timer_func(unsigned long unused)
{
	int changed = 0;

	dev_dbg(dev, "polling...\n");

	update_status();

	if (!ac_irq && new_ac_status != ac_status) {
		ac_status = PDA_PSY_TO_CHANGE;
		changed = 1;
	}

	if (!usb_irq && new_usb_status != usb_status) {
		usb_status = PDA_PSY_TO_CHANGE;
		changed = 1;
	}

	if (changed)
		psy_changed();

	mod_timer(&polling_timer,
		  jiffies + msecs_to_jiffies(pdata->polling_interval));
}

#if IS_ENABLED(CONFIG_USB_PHY)
static int otg_is_usb_online(void)
{
	return (transceiver->last_event == USB_EVENT_VBUS ||
		transceiver->last_event == USB_EVENT_ENUMERATED);
}

static int otg_is_ac_online(void)
{
	return (transceiver->last_event == USB_EVENT_CHARGER);
}

static int otg_handle_notification(struct notifier_block *nb,
		unsigned long event, void *unused)
{
	switch (event) {
	case USB_EVENT_CHARGER:
		ac_status = PDA_PSY_TO_CHANGE;
		break;
	case USB_EVENT_VBUS:
	case USB_EVENT_ENUMERATED:
		usb_status = PDA_PSY_TO_CHANGE;
		break;
	case USB_EVENT_NONE:
		ac_status = PDA_PSY_TO_CHANGE;
		usb_status = PDA_PSY_TO_CHANGE;
		break;
	default:
		return NOTIFY_OK;
	}

	/*
	 * Wait a bit before reading ac/usb line status and setting charger,
	 * because ac/usb status readings may lag from irq.
	 */
	mod_timer(&charger_timer,
		  jiffies + msecs_to_jiffies(pdata->wait_for_status));

	return NOTIFY_OK;
}
#endif

static int pda_power_probe(struct platform_device *pdev)
{
	struct power_supply_config psy_cfg = {};
	int ret = 0;

	dev = &pdev->dev;

	if (pdev->id != -1) {
		dev_err(dev, "it's meaningless to register several "
			"pda_powers; use id = -1\n");
		ret = -EINVAL;
		goto wrongid;
	}

	pdata = pdev->dev.platform_data;

	if (pdata->init) {
		ret = pdata->init(dev);
		if (ret < 0)
			goto init_failed;
	}

	ac_draw = regulator_get(dev, "ac_draw");
	if (IS_ERR(ac_draw)) {
		dev_dbg(dev, "couldn't get ac_draw regulator\n");
		ac_draw = NULL;
	}

	update_status();
	update_charger();

	if (!pdata->wait_for_status)
		pdata->wait_for_status = 500;

	if (!pdata->wait_for_charger)
		pdata->wait_for_charger = 500;

	if (!pdata->polling_interval)
		pdata->polling_interval = 2000;

	if (!pdata->ac_max_uA)
		pdata->ac_max_uA = 500000;

	setup_timer(&charger_timer, charger_timer_func, 0);
	setup_timer(&supply_timer, supply_timer_func, 0);

	ac_irq = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "ac");
	usb_irq = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "usb");

	if (pdata->supplied_to) {
		psy_cfg.supplied_to = pdata->supplied_to;
		psy_cfg.num_supplicants = pdata->num_supplicants;
	} else {
		psy_cfg.supplied_to = pda_power_supplied_to;
		psy_cfg.num_supplicants = ARRAY_SIZE(pda_power_supplied_to);
	}

#if IS_ENABLED(CONFIG_USB_PHY)
	transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
	if (!IS_ERR_OR_NULL(transceiver)) {
		if (!pdata->is_usb_online)
			pdata->is_usb_online = otg_is_usb_online;
		if (!pdata->is_ac_online)
			pdata->is_ac_online = otg_is_ac_online;
	}
#endif

	if (pdata->is_ac_online) {
		pda_psy_ac = power_supply_register(&pdev->dev,
						   &pda_psy_ac_desc, &psy_cfg);
		if (IS_ERR(pda_psy_ac)) {
			dev_err(dev, "failed to register %s power supply\n",
				pda_psy_ac_desc.name);
			ret = PTR_ERR(pda_psy_ac);
			goto ac_supply_failed;
		}

		if (ac_irq) {
			ret = request_irq(ac_irq->start, power_changed_isr,
					  get_irq_flags(ac_irq), ac_irq->name,
					  pda_psy_ac);
			if (ret) {
				dev_err(dev, "request ac irq failed\n");
				goto ac_irq_failed;
			}
		} else {
			polling = 1;
		}
	}

	if (pdata->is_usb_online) {
		pda_psy_usb = power_supply_register(&pdev->dev,
						    &pda_psy_usb_desc,
						    &psy_cfg);
		if (IS_ERR(pda_psy_usb)) {
			dev_err(dev, "failed to register %s power supply\n",
				pda_psy_usb_desc.name);
			ret = PTR_ERR(pda_psy_usb);
			goto usb_supply_failed;
		}

		if (usb_irq) {
			ret = request_irq(usb_irq->start, power_changed_isr,
					  get_irq_flags(usb_irq),
					  usb_irq->name, pda_psy_usb);
			if (ret) {
				dev_err(dev, "request usb irq failed\n");
				goto usb_irq_failed;
			}
		} else {
			polling = 1;
		}
	}

#if IS_ENABLED(CONFIG_USB_PHY)
	if (!IS_ERR_OR_NULL(transceiver) && pdata->use_otg_notifier) {
		otg_nb.notifier_call = otg_handle_notification;
		ret = usb_register_notifier(transceiver, &otg_nb);
		if (ret) {
			dev_err(dev, "failure to register otg notifier\n");
			goto otg_reg_notifier_failed;
		}
		polling = 0;
	}
#endif

	if (polling) {
		dev_dbg(dev, "will poll for status\n");
		setup_timer(&polling_timer, polling_timer_func, 0);
		mod_timer(&polling_timer,
			  jiffies + msecs_to_jiffies(pdata->polling_interval));
	}

	if (ac_irq || usb_irq)
		device_init_wakeup(&pdev->dev, 1);

	return 0;

#if IS_ENABLED(CONFIG_USB_PHY)
otg_reg_notifier_failed:
	if (pdata->is_usb_online && usb_irq)
		free_irq(usb_irq->start, pda_psy_usb);
#endif
usb_irq_failed:
	if (pdata->is_usb_online)
		power_supply_unregister(pda_psy_usb);
usb_supply_failed:
	if (pdata->is_ac_online && ac_irq)
		free_irq(ac_irq->start, pda_psy_ac);
#if IS_ENABLED(CONFIG_USB_PHY)
	if (!IS_ERR_OR_NULL(transceiver))
		usb_put_phy(transceiver);
#endif
ac_irq_failed:
	if (pdata->is_ac_online)
		power_supply_unregister(pda_psy_ac);
ac_supply_failed:
	if (ac_draw) {
		regulator_put(ac_draw);
		ac_draw = NULL;
	}
	if (pdata->exit)
		pdata->exit(dev);
init_failed:
wrongid:
	return ret;
}

static int pda_power_remove(struct platform_device *pdev)
{
	if (pdata->is_usb_online && usb_irq)
		free_irq(usb_irq->start, pda_psy_usb);
	if (pdata->is_ac_online && ac_irq)
		free_irq(ac_irq->start, pda_psy_ac);

	if (polling)
		del_timer_sync(&polling_timer);
	del_timer_sync(&charger_timer);
	del_timer_sync(&supply_timer);

	if (pdata->is_usb_online)
		power_supply_unregister(pda_psy_usb);
	if (pdata->is_ac_online)
		power_supply_unregister(pda_psy_ac);
#if IS_ENABLED(CONFIG_USB_PHY)
	if (!IS_ERR_OR_NULL(transceiver))
		usb_put_phy(transceiver);
#endif
	if (ac_draw) {
		regulator_put(ac_draw);
		ac_draw = NULL;
	}
	if (pdata->exit)
		pdata->exit(dev);

	return 0;
}

#ifdef CONFIG_PM
static int ac_wakeup_enabled;
static int usb_wakeup_enabled;

static int pda_power_suspend(struct platform_device *pdev, pm_message_t state)
{
	if (pdata->suspend) {
		int ret = pdata->suspend(state);

		if (ret)
			return ret;
	}

	if (device_may_wakeup(&pdev->dev)) {
		if (ac_irq)
			ac_wakeup_enabled = !enable_irq_wake(ac_irq->start);
		if (usb_irq)
			usb_wakeup_enabled = !enable_irq_wake(usb_irq->start);
	}

	return 0;
}

static int pda_power_resume(struct platform_device *pdev)
{
	if (device_may_wakeup(&pdev->dev)) {
		if (usb_irq && usb_wakeup_enabled)
			disable_irq_wake(usb_irq->start);
		if (ac_irq && ac_wakeup_enabled)
			disable_irq_wake(ac_irq->start);
	}

	if (pdata->resume)
		return pdata->resume();

	return 0;
}
#else
#define pda_power_suspend NULL
#define pda_power_resume NULL
#endif /* CONFIG_PM */

static struct platform_driver pda_power_pdrv = {
	.driver = {
		.name = "pda-power",
	},
	.probe = pda_power_probe,
	.remove = pda_power_remove,
	.suspend = pda_power_suspend,
	.resume = pda_power_resume,
};

module_platform_driver(pda_power_pdrv);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Anton Vorontsov <cbou@mail.ru>");
MODULE_ALIAS("platform:pda-power");
Commit	Line	Data
b2998049 AV	1	/*
	2	* Common power driver for PDAs and phones with one or two external
	3	* power supplies (AC/USB) connected to main and backup batteries,
	4	* and optional builtin charger.
	5	*
	6	* Copyright © 2007 Anton Vorontsov <cbou@mail.ru>
	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/platform_device.h>
5bf2b994	15	#include <linux/err.h>
b2998049	16	#include <linux/interrupt.h>
9ad63986	17	#include <linux/notifier.h>
b2998049 AV	18	#include <linux/power_supply.h>
b2998049 AV	19	#include <linux/pda_power.h>
5bf2b994	20	#include <linux/regulator/consumer.h>
b2998049 AV	21	#include <linux/timer.h>
b2998049 AV	22	#include <linux/jiffies.h>
5bf2b994	23	#include <linux/usb/otg.h>
b2998049 AV	24
	25	static inline unsigned int get_irq_flags(struct resource *res)
	26	{
d554a3f9	27	return IRQF_SHARED \| (res->flags & IRQF_TRIGGER_MASK);
b2998049 AV	28	}
	29
	30	static struct device *dev;
	31	static struct pda_power_pdata *pdata;
	32	static struct resource ac_irq, usb_irq;
	33	static struct timer_list charger_timer;
	34	static struct timer_list supply_timer;
c3caebad AV	35	static struct timer_list polling_timer;
c3caebad AV	36	static int polling;
297d716f	37	static struct power_supply pda_psy_ac, pda_psy_usb;
b2998049	38
820d0883	39	#if IS_ENABLED(CONFIG_USB_PHY)
86753811	40	static struct usb_phy *transceiver;
9ad63986	41	static struct notifier_block otg_nb;
1c74529d AL	42	#endif
1c74529d AL	43
5bf2b994 PZ	44	static struct regulator *ac_draw;
5bf2b994 PZ	45
bfde2662 AV	46	enum {
	47	PDA_PSY_OFFLINE = 0,
	48	PDA_PSY_ONLINE = 1,
	49	PDA_PSY_TO_CHANGE,
	50	};
	51	static int new_ac_status = -1;
	52	static int new_usb_status = -1;
	53	static int ac_status = -1;
	54	static int usb_status = -1;
	55
b2998049 AV	56	static int pda_power_get_property(struct power_supply *psy,
	57	enum power_supply_property psp,
	58	union power_supply_propval *val)
	59	{
	60	switch (psp) {
	61	case POWER_SUPPLY_PROP_ONLINE:
297d716f	62	if (psy->desc->type == POWER_SUPPLY_TYPE_MAINS)
b2998049 AV	63	val->intval = pdata->is_ac_online ?
	64	pdata->is_ac_online() : 0;
	65	else
	66	val->intval = pdata->is_usb_online ?
	67	pdata->is_usb_online() : 0;
	68	break;
	69	default:
	70	return -EINVAL;
	71	}
	72	return 0;
	73	}
	74
	75	static enum power_supply_property pda_power_props[] = {
	76	POWER_SUPPLY_PROP_ONLINE,
	77	};
	78
	79	static char *pda_power_supplied_to[] = {
	80	"main-battery",
	81	"backup-battery",
	82	};
	83
297d716f	84	static const struct power_supply_desc pda_psy_ac_desc = {
bfde2662 AV	85	.name = "ac",
bfde2662 AV	86	.type = POWER_SUPPLY_TYPE_MAINS,
bfde2662 AV	87	.properties = pda_power_props,
	88	.num_properties = ARRAY_SIZE(pda_power_props),
	89	.get_property = pda_power_get_property,
b2998049 AV	90	};
b2998049 AV	91
297d716f	92	static const struct power_supply_desc pda_psy_usb_desc = {
bfde2662 AV	93	.name = "usb",
bfde2662 AV	94	.type = POWER_SUPPLY_TYPE_USB,
bfde2662 AV	95	.properties = pda_power_props,
	96	.num_properties = ARRAY_SIZE(pda_power_props),
	97	.get_property = pda_power_get_property,
	98	};
	99
	100	static void update_status(void)
	101	{
	102	if (pdata->is_ac_online)
	103	new_ac_status = !!pdata->is_ac_online();
	104
	105	if (pdata->is_usb_online)
	106	new_usb_status = !!pdata->is_usb_online();
	107	}
	108
b2998049 AV	109	static void update_charger(void)
b2998049 AV	110	{
5bf2b994 PZ	111	static int regulator_enabled;
	112	int max_uA = pdata->ac_max_uA;
	113
	114	if (pdata->set_charge) {
	115	if (new_ac_status > 0) {
	116	dev_dbg(dev, "charger on (AC)\n");
	117	pdata->set_charge(PDA_POWER_CHARGE_AC);
	118	} else if (new_usb_status > 0) {
	119	dev_dbg(dev, "charger on (USB)\n");
	120	pdata->set_charge(PDA_POWER_CHARGE_USB);
	121	} else {
	122	dev_dbg(dev, "charger off\n");
	123	pdata->set_charge(0);
	124	}
	125	} else if (ac_draw) {
	126	if (new_ac_status > 0) {
	127	regulator_set_current_limit(ac_draw, max_uA, max_uA);
	128	if (!regulator_enabled) {
	129	dev_dbg(dev, "charger on (AC)\n");
92311c3c	130	WARN_ON(regulator_enable(ac_draw));
5bf2b994 PZ	131	regulator_enabled = 1;
	132	}
	133	} else {
	134	if (regulator_enabled) {
	135	dev_dbg(dev, "charger off\n");
92311c3c	136	WARN_ON(regulator_disable(ac_draw));
5bf2b994 PZ	137	regulator_enabled = 0;
	138	}
	139	}
b2998049	140	}
b2998049 AV	141	}
b2998049 AV	142
bfde2662	143	static void supply_timer_func(unsigned long unused)
b2998049	144	{
bfde2662 AV	145	if (ac_status == PDA_PSY_TO_CHANGE) {
bfde2662 AV	146	ac_status = new_ac_status;
297d716f	147	power_supply_changed(pda_psy_ac);
bfde2662	148	}
5ebf6e6a	149
bfde2662 AV	150	if (usb_status == PDA_PSY_TO_CHANGE) {
bfde2662 AV	151	usb_status = new_usb_status;
297d716f	152	power_supply_changed(pda_psy_usb);
bfde2662	153	}
b2998049 AV	154	}
b2998049 AV	155
bfde2662	156	static void psy_changed(void)
b2998049 AV	157	{
	158	update_charger();
	159
bfde2662 AV	160	/*
	161	* Okay, charger set. Now wait a bit before notifying supplicants,
	162	* charge power should stabilize.
	163	*/
b2998049 AV	164	mod_timer(&supply_timer,
b2998049 AV	165	jiffies + msecs_to_jiffies(pdata->wait_for_charger));
b2998049 AV	166	}
b2998049 AV	167
bfde2662 AV	168	static void charger_timer_func(unsigned long unused)
	169	{
	170	update_status();
	171	psy_changed();
	172	}
	173
5ebf6e6a	174	static irqreturn_t power_changed_isr(int irq, void *power_supply)
b2998049	175	{
297d716f	176	if (power_supply == pda_psy_ac)
bfde2662	177	ac_status = PDA_PSY_TO_CHANGE;
297d716f	178	else if (power_supply == pda_psy_usb)
bfde2662 AV	179	usb_status = PDA_PSY_TO_CHANGE;
	180	else
	181	return IRQ_NONE;
	182
	183	/*
	184	* Wait a bit before reading ac/usb line status and setting charger,
	185	* because ac/usb status readings may lag from irq.
	186	*/
b2998049 AV	187	mod_timer(&charger_timer,
b2998049 AV	188	jiffies + msecs_to_jiffies(pdata->wait_for_status));
bfde2662	189
b2998049 AV	190	return IRQ_HANDLED;
	191	}
	192
c3caebad AV	193	static void polling_timer_func(unsigned long unused)
	194	{
	195	int changed = 0;
	196
	197	dev_dbg(dev, "polling...\n");
	198
	199	update_status();
	200
	201	if (!ac_irq && new_ac_status != ac_status) {
	202	ac_status = PDA_PSY_TO_CHANGE;
	203	changed = 1;
	204	}
	205
	206	if (!usb_irq && new_usb_status != usb_status) {
	207	usb_status = PDA_PSY_TO_CHANGE;
	208	changed = 1;
	209	}
	210
	211	if (changed)
	212	psy_changed();
	213
	214	mod_timer(&polling_timer,
	215	jiffies + msecs_to_jiffies(pdata->polling_interval));
	216	}
	217
820d0883	218	#if IS_ENABLED(CONFIG_USB_PHY)
5bf2b994 PZ	219	static int otg_is_usb_online(void)
5bf2b994 PZ	220	{
9ad63986 DZ	221	return (transceiver->last_event == USB_EVENT_VBUS \|\|
	222	transceiver->last_event == USB_EVENT_ENUMERATED);
	223	}
	224
	225	static int otg_is_ac_online(void)
	226	{
	227	return (transceiver->last_event == USB_EVENT_CHARGER);
	228	}
	229
	230	static int otg_handle_notification(struct notifier_block *nb,
	231	unsigned long event, void *unused)
	232	{
	233	switch (event) {
	234	case USB_EVENT_CHARGER:
	235	ac_status = PDA_PSY_TO_CHANGE;
	236	break;
	237	case USB_EVENT_VBUS:
	238	case USB_EVENT_ENUMERATED:
	239	usb_status = PDA_PSY_TO_CHANGE;
	240	break;
	241	case USB_EVENT_NONE:
	242	ac_status = PDA_PSY_TO_CHANGE;
	243	usb_status = PDA_PSY_TO_CHANGE;
	244	break;
	245	default:
	246	return NOTIFY_OK;
	247	}
	248
	249	/*
	250	* Wait a bit before reading ac/usb line status and setting charger,
	251	* because ac/usb status readings may lag from irq.
	252	*/
	253	mod_timer(&charger_timer,
	254	jiffies + msecs_to_jiffies(pdata->wait_for_status));
	255
	256	return NOTIFY_OK;
5bf2b994 PZ	257	}
	258	#endif
	259
b2998049 AV	260	static int pda_power_probe(struct platform_device *pdev)
b2998049 AV	261	{
2dc9215d	262	struct power_supply_config psy_cfg = {};
b2998049 AV	263	int ret = 0;
	264
	265	dev = &pdev->dev;
	266
	267	if (pdev->id != -1) {
	268	dev_err(dev, "it's meaningless to register several "
	269	"pda_powers; use id = -1\n");
	270	ret = -EINVAL;
	271	goto wrongid;
	272	}
	273
	274	pdata = pdev->dev.platform_data;
	275
f6b6b180 PZ	276	if (pdata->init) {
	277	ret = pdata->init(dev);
	278	if (ret < 0)
	279	goto init_failed;
	280	}
	281
ec60ea5c PP	282	ac_draw = regulator_get(dev, "ac_draw");
	283	if (IS_ERR(ac_draw)) {
	284	dev_dbg(dev, "couldn't get ac_draw regulator\n");
	285	ac_draw = NULL;
ec60ea5c PP	286	}
ec60ea5c PP	287
bfde2662	288	update_status();
b2998049 AV	289	update_charger();
	290
	291	if (!pdata->wait_for_status)
	292	pdata->wait_for_status = 500;
	293
	294	if (!pdata->wait_for_charger)
	295	pdata->wait_for_charger = 500;
	296
c3caebad AV	297	if (!pdata->polling_interval)
	298	pdata->polling_interval = 2000;
	299
5bf2b994 PZ	300	if (!pdata->ac_max_uA)
	301	pdata->ac_max_uA = 500000;
	302
b2998049 AV	303	setup_timer(&charger_timer, charger_timer_func, 0);
	304	setup_timer(&supply_timer, supply_timer_func, 0);
	305
	306	ac_irq = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "ac");
	307	usb_irq = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "usb");
b2998049 AV	308
b2998049 AV	309	if (pdata->supplied_to) {
2dc9215d KK	310	psy_cfg.supplied_to = pdata->supplied_to;
	311	psy_cfg.num_supplicants = pdata->num_supplicants;
	312	} else {
	313	psy_cfg.supplied_to = pda_power_supplied_to;
	314	psy_cfg.num_supplicants = ARRAY_SIZE(pda_power_supplied_to);
b2998049 AV	315	}
b2998049 AV	316
820d0883	317	#if IS_ENABLED(CONFIG_USB_PHY)
662dca54	318	transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
ded017ee KVA	319	if (!IS_ERR_OR_NULL(transceiver)) {
	320	if (!pdata->is_usb_online)
	321	pdata->is_usb_online = otg_is_usb_online;
	322	if (!pdata->is_ac_online)
	323	pdata->is_ac_online = otg_is_ac_online;
9ad63986	324	}
1c74529d	325	#endif
9ad63986	326
9ef45106	327	if (pdata->is_ac_online) {
297d716f KK	328	pda_psy_ac = power_supply_register(&pdev->dev,
	329	&pda_psy_ac_desc, &psy_cfg);
	330	if (IS_ERR(pda_psy_ac)) {
9ef45106	331	dev_err(dev, "failed to register %s power supply\n",
297d716f KK	332	pda_psy_ac_desc.name);
297d716f KK	333	ret = PTR_ERR(pda_psy_ac);
9ef45106 DB	334	goto ac_supply_failed;
9ef45106 DB	335	}
b2998049	336
9ef45106 DB	337	if (ac_irq) {
	338	ret = request_irq(ac_irq->start, power_changed_isr,
	339	get_irq_flags(ac_irq), ac_irq->name,
297d716f	340	pda_psy_ac);
9ef45106 DB	341	if (ret) {
	342	dev_err(dev, "request ac irq failed\n");
	343	goto ac_irq_failed;
	344	}
c3caebad AV	345	} else {
c3caebad AV	346	polling = 1;
9ef45106	347	}
b2998049 AV	348	}
b2998049 AV	349
9ef45106	350	if (pdata->is_usb_online) {
297d716f KK	351	pda_psy_usb = power_supply_register(&pdev->dev,
	352	&pda_psy_usb_desc,
	353	&psy_cfg);
	354	if (IS_ERR(pda_psy_usb)) {
9ef45106	355	dev_err(dev, "failed to register %s power supply\n",
297d716f KK	356	pda_psy_usb_desc.name);
297d716f KK	357	ret = PTR_ERR(pda_psy_usb);
9ef45106	358	goto usb_supply_failed;
b2998049	359	}
b2998049	360
9ef45106 DB	361	if (usb_irq) {
	362	ret = request_irq(usb_irq->start, power_changed_isr,
	363	get_irq_flags(usb_irq),
297d716f	364	usb_irq->name, pda_psy_usb);
9ef45106 DB	365	if (ret) {
	366	dev_err(dev, "request usb irq failed\n");
	367	goto usb_irq_failed;
	368	}
c3caebad AV	369	} else {
c3caebad AV	370	polling = 1;
b2998049 AV	371	}
	372	}
	373
820d0883	374	#if IS_ENABLED(CONFIG_USB_PHY)
ded017ee	375	if (!IS_ERR_OR_NULL(transceiver) && pdata->use_otg_notifier) {
9ad63986	376	otg_nb.notifier_call = otg_handle_notification;
fcc8ebc9	377	ret = usb_register_notifier(transceiver, &otg_nb);
9ad63986 DZ	378	if (ret) {
	379	dev_err(dev, "failure to register otg notifier\n");
	380	goto otg_reg_notifier_failed;
	381	}
	382	polling = 0;
	383	}
1c74529d	384	#endif
9ad63986	385
c3caebad AV	386	if (polling) {
	387	dev_dbg(dev, "will poll for status\n");
	388	setup_timer(&polling_timer, polling_timer_func, 0);
	389	mod_timer(&polling_timer,
	390	jiffies + msecs_to_jiffies(pdata->polling_interval));
	391	}
	392
	393	if (ac_irq \|\| usb_irq)
	394	device_init_wakeup(&pdev->dev, 1);
8f8e9b38	395
9ef45106	396	return 0;
b2998049	397
820d0883	398	#if IS_ENABLED(CONFIG_USB_PHY)
9ad63986 DZ	399	otg_reg_notifier_failed:
9ad63986 DZ	400	if (pdata->is_usb_online && usb_irq)
297d716f	401	free_irq(usb_irq->start, pda_psy_usb);
1c74529d	402	#endif
b2998049	403	usb_irq_failed:
9ef45106	404	if (pdata->is_usb_online)
297d716f	405	power_supply_unregister(pda_psy_usb);
9ef45106 DB	406	usb_supply_failed:
9ef45106 DB	407	if (pdata->is_ac_online && ac_irq)
297d716f	408	free_irq(ac_irq->start, pda_psy_ac);
820d0883	409	#if IS_ENABLED(CONFIG_USB_PHY)
ded017ee	410	if (!IS_ERR_OR_NULL(transceiver))
721002ec	411	usb_put_phy(transceiver);
1c74529d	412	#endif
b2998049	413	ac_irq_failed:
9ef45106	414	if (pdata->is_ac_online)
297d716f	415	power_supply_unregister(pda_psy_ac);
9ef45106	416	ac_supply_failed:
5bf2b994 PZ	417	if (ac_draw) {
	418	regulator_put(ac_draw);
	419	ac_draw = NULL;
	420	}
f6b6b180 PZ	421	if (pdata->exit)
	422	pdata->exit(dev);
	423	init_failed:
b2998049	424	wrongid:
b2998049 AV	425	return ret;
	426	}
	427
	428	static int pda_power_remove(struct platform_device *pdev)
	429	{
9ef45106	430	if (pdata->is_usb_online && usb_irq)
297d716f	431	free_irq(usb_irq->start, pda_psy_usb);
9ef45106	432	if (pdata->is_ac_online && ac_irq)
297d716f	433	free_irq(ac_irq->start, pda_psy_ac);
bfde2662	434
c3caebad AV	435	if (polling)
c3caebad AV	436	del_timer_sync(&polling_timer);
b2998049 AV	437	del_timer_sync(&charger_timer);
b2998049 AV	438	del_timer_sync(&supply_timer);
bfde2662	439
9ef45106	440	if (pdata->is_usb_online)
297d716f	441	power_supply_unregister(pda_psy_usb);
9ef45106	442	if (pdata->is_ac_online)
297d716f	443	power_supply_unregister(pda_psy_ac);
820d0883	444	#if IS_ENABLED(CONFIG_USB_PHY)
ded017ee	445	if (!IS_ERR_OR_NULL(transceiver))
721002ec	446	usb_put_phy(transceiver);
5bf2b994 PZ	447	#endif
	448	if (ac_draw) {
	449	regulator_put(ac_draw);
	450	ac_draw = NULL;
	451	}
f6b6b180 PZ	452	if (pdata->exit)
f6b6b180 PZ	453	pdata->exit(dev);
bfde2662	454
b2998049 AV	455	return 0;
	456	}
	457
8f8e9b38	458	#ifdef CONFIG_PM
e82374fd RJ	459	static int ac_wakeup_enabled;
	460	static int usb_wakeup_enabled;
	461
8f8e9b38 DB	462	static int pda_power_suspend(struct platform_device *pdev, pm_message_t state)
8f8e9b38 DB	463	{
a3bcbbee DM	464	if (pdata->suspend) {
	465	int ret = pdata->suspend(state);
	466
	467	if (ret)
	468	return ret;
	469	}
	470
8f8e9b38 DB	471	if (device_may_wakeup(&pdev->dev)) {
8f8e9b38 DB	472	if (ac_irq)
e82374fd	473	ac_wakeup_enabled = !enable_irq_wake(ac_irq->start);
8f8e9b38	474	if (usb_irq)
e82374fd	475	usb_wakeup_enabled = !enable_irq_wake(usb_irq->start);
8f8e9b38 DB	476	}
	477
	478	return 0;
	479	}
	480
	481	static int pda_power_resume(struct platform_device *pdev)
	482	{
	483	if (device_may_wakeup(&pdev->dev)) {
e82374fd	484	if (usb_irq && usb_wakeup_enabled)
8f8e9b38	485	disable_irq_wake(usb_irq->start);
e82374fd	486	if (ac_irq && ac_wakeup_enabled)
8f8e9b38 DB	487	disable_irq_wake(ac_irq->start);
	488	}
	489
a3bcbbee DM	490	if (pdata->resume)
	491	return pdata->resume();
	492
8f8e9b38 DB	493	return 0;
	494	}
	495	#else
	496	#define pda_power_suspend NULL
	497	#define pda_power_resume NULL
	498	#endif /* CONFIG_PM */
	499
b2998049 AV	500	static struct platform_driver pda_power_pdrv = {
	501	.driver = {
	502	.name = "pda-power",
	503	},
	504	.probe = pda_power_probe,
	505	.remove = pda_power_remove,
8f8e9b38 DB	506	.suspend = pda_power_suspend,
8f8e9b38 DB	507	.resume = pda_power_resume,
b2998049 AV	508	};
b2998049 AV	509
300bac7f	510	module_platform_driver(pda_power_pdrv);
b2998049	511
b2998049 AV	512	MODULE_LICENSE("GPL");
b2998049 AV	513	MODULE_AUTHOR("Anton Vorontsov <cbou@mail.ru>");
300bac7f	514	MODULE_ALIAS("platform:pda-power");