[linux.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 <[email protected]>
 *
 * 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/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)
{
	unsigned int flags = IRQF_SAMPLE_RANDOM | IRQF_SHARED;

	flags |= res->flags & IRQF_TRIGGER_MASK;

	return flags;
}

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;

#ifdef CONFIG_USB_OTG_UTILS
static struct otg_transceiver *transceiver;
#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->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 struct power_supply pda_psy_ac = {
	.name = "ac",
	.type = POWER_SUPPLY_TYPE_MAINS,
	.supplied_to = pda_power_supplied_to,
	.num_supplicants = ARRAY_SIZE(pda_power_supplied_to),
	.properties = pda_power_props,
	.num_properties = ARRAY_SIZE(pda_power_props),
	.get_property = pda_power_get_property,
};

static struct power_supply pda_psy_usb = {
	.name = "usb",
	.type = POWER_SUPPLY_TYPE_USB,
	.supplied_to = pda_power_supplied_to,
	.num_supplicants = ARRAY_SIZE(pda_power_supplied_to),
	.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");
				regulator_enable(ac_draw);
				regulator_enabled = 1;
			}
		} else {
			if (regulator_enabled) {
				dev_dbg(dev, "charger off\n");
				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));
}

#ifdef CONFIG_USB_OTG_UTILS
static int otg_is_usb_online(void)
{
	return (transceiver->state == OTG_STATE_B_PERIPHERAL);
}
#endif

static int pda_power_probe(struct platform_device *pdev)
{
	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;
	}

	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) {
		pda_psy_ac.supplied_to = pdata->supplied_to;
		pda_psy_ac.num_supplicants = pdata->num_supplicants;
		pda_psy_usb.supplied_to = pdata->supplied_to;
		pda_psy_usb.num_supplicants = pdata->num_supplicants;
	}

	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;
		ret = PTR_ERR(ac_draw);
	}

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

#ifdef CONFIG_USB_OTG_UTILS
	transceiver = otg_get_transceiver();
	if (transceiver && !pdata->is_usb_online) {
		pdata->is_usb_online = otg_is_usb_online;
	}
#endif

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

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);
#ifdef CONFIG_USB_OTG_UTILS
	if (transceiver)
		otg_put_transceiver(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);
#ifdef CONFIG_USB_OTG_UTILS
	if (transceiver)
		otg_put_transceiver(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 (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);
	}

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

MODULE_ALIAS("platform:pda-power");

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,
};

static int __init pda_power_init(void)
{
	return platform_driver_register(&pda_power_pdrv);
}

static void __exit pda_power_exit(void)
{
	platform_driver_unregister(&pda_power_pdrv);
}

module_init(pda_power_init);
module_exit(pda_power_exit);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Anton Vorontsov <[email protected]>");
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 <[email protected]>
	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 AV	16	#include <linux/interrupt.h>
	17	#include <linux/power_supply.h>
	18	#include <linux/pda_power.h>
5bf2b994	19	#include <linux/regulator/consumer.h>
b2998049 AV	20	#include <linux/timer.h>
b2998049 AV	21	#include <linux/jiffies.h>
5bf2b994	22	#include <linux/usb/otg.h>
b2998049 AV	23
	24	static inline unsigned int get_irq_flags(struct resource *res)
	25	{
74194cc7	26	unsigned int flags = IRQF_SAMPLE_RANDOM \| IRQF_SHARED;
b2998049 AV	27
	28	flags \|= res->flags & IRQF_TRIGGER_MASK;
	29
	30	return flags;
	31	}
	32
	33	static struct device *dev;
	34	static struct pda_power_pdata *pdata;
	35	static struct resource ac_irq, usb_irq;
	36	static struct timer_list charger_timer;
	37	static struct timer_list supply_timer;
c3caebad AV	38	static struct timer_list polling_timer;
c3caebad AV	39	static int polling;
b2998049	40
5bf2b994 PZ	41	#ifdef CONFIG_USB_OTG_UTILS
	42	static struct otg_transceiver *transceiver;
	43	#endif
	44	static struct regulator *ac_draw;
	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:
	62	if (psy->type == POWER_SUPPLY_TYPE_MAINS)
	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
bfde2662 AV	84	static struct power_supply pda_psy_ac = {
	85	.name = "ac",
	86	.type = POWER_SUPPLY_TYPE_MAINS,
	87	.supplied_to = pda_power_supplied_to,
	88	.num_supplicants = ARRAY_SIZE(pda_power_supplied_to),
	89	.properties = pda_power_props,
	90	.num_properties = ARRAY_SIZE(pda_power_props),
	91	.get_property = pda_power_get_property,
b2998049 AV	92	};
b2998049 AV	93
bfde2662 AV	94	static struct power_supply pda_psy_usb = {
	95	.name = "usb",
	96	.type = POWER_SUPPLY_TYPE_USB,
	97	.supplied_to = pda_power_supplied_to,
	98	.num_supplicants = ARRAY_SIZE(pda_power_supplied_to),
	99	.properties = pda_power_props,
	100	.num_properties = ARRAY_SIZE(pda_power_props),
	101	.get_property = pda_power_get_property,
	102	};
	103
	104	static void update_status(void)
	105	{
	106	if (pdata->is_ac_online)
	107	new_ac_status = !!pdata->is_ac_online();
	108
	109	if (pdata->is_usb_online)
	110	new_usb_status = !!pdata->is_usb_online();
	111	}
	112
b2998049 AV	113	static void update_charger(void)
b2998049 AV	114	{
5bf2b994 PZ	115	static int regulator_enabled;
	116	int max_uA = pdata->ac_max_uA;
	117
	118	if (pdata->set_charge) {
	119	if (new_ac_status > 0) {
	120	dev_dbg(dev, "charger on (AC)\n");
	121	pdata->set_charge(PDA_POWER_CHARGE_AC);
	122	} else if (new_usb_status > 0) {
	123	dev_dbg(dev, "charger on (USB)\n");
	124	pdata->set_charge(PDA_POWER_CHARGE_USB);
	125	} else {
	126	dev_dbg(dev, "charger off\n");
	127	pdata->set_charge(0);
	128	}
	129	} else if (ac_draw) {
	130	if (new_ac_status > 0) {
	131	regulator_set_current_limit(ac_draw, max_uA, max_uA);
	132	if (!regulator_enabled) {
	133	dev_dbg(dev, "charger on (AC)\n");
	134	regulator_enable(ac_draw);
	135	regulator_enabled = 1;
	136	}
	137	} else {
	138	if (regulator_enabled) {
	139	dev_dbg(dev, "charger off\n");
	140	regulator_disable(ac_draw);
	141	regulator_enabled = 0;
	142	}
	143	}
b2998049	144	}
b2998049 AV	145	}
b2998049 AV	146
bfde2662	147	static void supply_timer_func(unsigned long unused)
b2998049	148	{
bfde2662 AV	149	if (ac_status == PDA_PSY_TO_CHANGE) {
	150	ac_status = new_ac_status;
	151	power_supply_changed(&pda_psy_ac);
	152	}
5ebf6e6a	153
bfde2662 AV	154	if (usb_status == PDA_PSY_TO_CHANGE) {
	155	usb_status = new_usb_status;
	156	power_supply_changed(&pda_psy_usb);
	157	}
b2998049 AV	158	}
b2998049 AV	159
bfde2662	160	static void psy_changed(void)
b2998049 AV	161	{
	162	update_charger();
	163
bfde2662 AV	164	/*
	165	* Okay, charger set. Now wait a bit before notifying supplicants,
	166	* charge power should stabilize.
	167	*/
b2998049 AV	168	mod_timer(&supply_timer,
b2998049 AV	169	jiffies + msecs_to_jiffies(pdata->wait_for_charger));
b2998049 AV	170	}
b2998049 AV	171
bfde2662 AV	172	static void charger_timer_func(unsigned long unused)
	173	{
	174	update_status();
	175	psy_changed();
	176	}
	177
5ebf6e6a	178	static irqreturn_t power_changed_isr(int irq, void *power_supply)
b2998049	179	{
bfde2662 AV	180	if (power_supply == &pda_psy_ac)
	181	ac_status = PDA_PSY_TO_CHANGE;
	182	else if (power_supply == &pda_psy_usb)
	183	usb_status = PDA_PSY_TO_CHANGE;
	184	else
	185	return IRQ_NONE;
	186
	187	/*
	188	* Wait a bit before reading ac/usb line status and setting charger,
	189	* because ac/usb status readings may lag from irq.
	190	*/
b2998049 AV	191	mod_timer(&charger_timer,
b2998049 AV	192	jiffies + msecs_to_jiffies(pdata->wait_for_status));
bfde2662	193
b2998049 AV	194	return IRQ_HANDLED;
	195	}
	196
c3caebad AV	197	static void polling_timer_func(unsigned long unused)
	198	{
	199	int changed = 0;
	200
	201	dev_dbg(dev, "polling...\n");
	202
	203	update_status();
	204
	205	if (!ac_irq && new_ac_status != ac_status) {
	206	ac_status = PDA_PSY_TO_CHANGE;
	207	changed = 1;
	208	}
	209
	210	if (!usb_irq && new_usb_status != usb_status) {
	211	usb_status = PDA_PSY_TO_CHANGE;
	212	changed = 1;
	213	}
	214
	215	if (changed)
	216	psy_changed();
	217
	218	mod_timer(&polling_timer,
	219	jiffies + msecs_to_jiffies(pdata->polling_interval));
	220	}
	221
5bf2b994 PZ	222	#ifdef CONFIG_USB_OTG_UTILS
	223	static int otg_is_usb_online(void)
	224	{
	225	return (transceiver->state == OTG_STATE_B_PERIPHERAL);
	226	}
	227	#endif
	228
b2998049 AV	229	static int pda_power_probe(struct platform_device *pdev)
	230	{
	231	int ret = 0;
	232
	233	dev = &pdev->dev;
	234
	235	if (pdev->id != -1) {
	236	dev_err(dev, "it's meaningless to register several "
	237	"pda_powers; use id = -1\n");
	238	ret = -EINVAL;
	239	goto wrongid;
	240	}
	241
	242	pdata = pdev->dev.platform_data;
	243
f6b6b180 PZ	244	if (pdata->init) {
	245	ret = pdata->init(dev);
	246	if (ret < 0)
	247	goto init_failed;
	248	}
	249
bfde2662	250	update_status();
b2998049 AV	251	update_charger();
	252
	253	if (!pdata->wait_for_status)
	254	pdata->wait_for_status = 500;
	255
	256	if (!pdata->wait_for_charger)
	257	pdata->wait_for_charger = 500;
	258
c3caebad AV	259	if (!pdata->polling_interval)
	260	pdata->polling_interval = 2000;
	261
5bf2b994 PZ	262	if (!pdata->ac_max_uA)
	263	pdata->ac_max_uA = 500000;
	264
b2998049 AV	265	setup_timer(&charger_timer, charger_timer_func, 0);
	266	setup_timer(&supply_timer, supply_timer_func, 0);
	267
	268	ac_irq = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "ac");
	269	usb_irq = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "usb");
b2998049 AV	270
b2998049 AV	271	if (pdata->supplied_to) {
bfde2662 AV	272	pda_psy_ac.supplied_to = pdata->supplied_to;
	273	pda_psy_ac.num_supplicants = pdata->num_supplicants;
	274	pda_psy_usb.supplied_to = pdata->supplied_to;
	275	pda_psy_usb.num_supplicants = pdata->num_supplicants;
b2998049 AV	276	}
b2998049 AV	277
5bf2b994 PZ	278	ac_draw = regulator_get(dev, "ac_draw");
	279	if (IS_ERR(ac_draw)) {
	280	dev_dbg(dev, "couldn't get ac_draw regulator\n");
	281	ac_draw = NULL;
	282	ret = PTR_ERR(ac_draw);
	283	}
	284
9ef45106	285	if (pdata->is_ac_online) {
bfde2662	286	ret = power_supply_register(&pdev->dev, &pda_psy_ac);
9ef45106 DB	287	if (ret) {
9ef45106 DB	288	dev_err(dev, "failed to register %s power supply\n",
bfde2662	289	pda_psy_ac.name);
9ef45106 DB	290	goto ac_supply_failed;
9ef45106 DB	291	}
b2998049	292
9ef45106 DB	293	if (ac_irq) {
	294	ret = request_irq(ac_irq->start, power_changed_isr,
	295	get_irq_flags(ac_irq), ac_irq->name,
bfde2662	296	&pda_psy_ac);
9ef45106 DB	297	if (ret) {
	298	dev_err(dev, "request ac irq failed\n");
	299	goto ac_irq_failed;
	300	}
c3caebad AV	301	} else {
c3caebad AV	302	polling = 1;
9ef45106	303	}
b2998049 AV	304	}
b2998049 AV	305
5bf2b994 PZ	306	#ifdef CONFIG_USB_OTG_UTILS
	307	transceiver = otg_get_transceiver();
	308	if (transceiver && !pdata->is_usb_online) {
	309	pdata->is_usb_online = otg_is_usb_online;
	310	}
	311	#endif
	312
9ef45106	313	if (pdata->is_usb_online) {
bfde2662	314	ret = power_supply_register(&pdev->dev, &pda_psy_usb);
b2998049	315	if (ret) {
9ef45106	316	dev_err(dev, "failed to register %s power supply\n",
bfde2662	317	pda_psy_usb.name);
9ef45106	318	goto usb_supply_failed;
b2998049	319	}
b2998049	320
9ef45106 DB	321	if (usb_irq) {
	322	ret = request_irq(usb_irq->start, power_changed_isr,
	323	get_irq_flags(usb_irq),
bfde2662	324	usb_irq->name, &pda_psy_usb);
9ef45106 DB	325	if (ret) {
	326	dev_err(dev, "request usb irq failed\n");
	327	goto usb_irq_failed;
	328	}
c3caebad AV	329	} else {
c3caebad AV	330	polling = 1;
b2998049 AV	331	}
	332	}
	333
c3caebad AV	334	if (polling) {
	335	dev_dbg(dev, "will poll for status\n");
	336	setup_timer(&polling_timer, polling_timer_func, 0);
	337	mod_timer(&polling_timer,
	338	jiffies + msecs_to_jiffies(pdata->polling_interval));
	339	}
	340
	341	if (ac_irq \|\| usb_irq)
	342	device_init_wakeup(&pdev->dev, 1);
8f8e9b38	343
9ef45106	344	return 0;
b2998049 AV	345
b2998049 AV	346	usb_irq_failed:
9ef45106	347	if (pdata->is_usb_online)
bfde2662	348	power_supply_unregister(&pda_psy_usb);
9ef45106 DB	349	usb_supply_failed:
9ef45106 DB	350	if (pdata->is_ac_online && ac_irq)
bfde2662	351	free_irq(ac_irq->start, &pda_psy_ac);
5bf2b994 PZ	352	#ifdef CONFIG_USB_OTG_UTILS
	353	if (transceiver)
	354	otg_put_transceiver(transceiver);
	355	#endif
b2998049	356	ac_irq_failed:
9ef45106	357	if (pdata->is_ac_online)
bfde2662	358	power_supply_unregister(&pda_psy_ac);
9ef45106	359	ac_supply_failed:
5bf2b994 PZ	360	if (ac_draw) {
	361	regulator_put(ac_draw);
	362	ac_draw = NULL;
	363	}
f6b6b180 PZ	364	if (pdata->exit)
	365	pdata->exit(dev);
	366	init_failed:
b2998049	367	wrongid:
b2998049 AV	368	return ret;
	369	}
	370
	371	static int pda_power_remove(struct platform_device *pdev)
	372	{
9ef45106	373	if (pdata->is_usb_online && usb_irq)
bfde2662	374	free_irq(usb_irq->start, &pda_psy_usb);
9ef45106	375	if (pdata->is_ac_online && ac_irq)
bfde2662 AV	376	free_irq(ac_irq->start, &pda_psy_ac);
bfde2662 AV	377
c3caebad AV	378	if (polling)
c3caebad AV	379	del_timer_sync(&polling_timer);
b2998049 AV	380	del_timer_sync(&charger_timer);
b2998049 AV	381	del_timer_sync(&supply_timer);
bfde2662	382
9ef45106	383	if (pdata->is_usb_online)
bfde2662	384	power_supply_unregister(&pda_psy_usb);
9ef45106	385	if (pdata->is_ac_online)
bfde2662	386	power_supply_unregister(&pda_psy_ac);
5bf2b994 PZ	387	#ifdef CONFIG_USB_OTG_UTILS
	388	if (transceiver)
	389	otg_put_transceiver(transceiver);
	390	#endif
	391	if (ac_draw) {
	392	regulator_put(ac_draw);
	393	ac_draw = NULL;
	394	}
f6b6b180 PZ	395	if (pdata->exit)
f6b6b180 PZ	396	pdata->exit(dev);
bfde2662	397
b2998049 AV	398	return 0;
	399	}
	400
8f8e9b38	401	#ifdef CONFIG_PM
e82374fd RJ	402	static int ac_wakeup_enabled;
	403	static int usb_wakeup_enabled;
	404
8f8e9b38 DB	405	static int pda_power_suspend(struct platform_device *pdev, pm_message_t state)
	406	{
	407	if (device_may_wakeup(&pdev->dev)) {
	408	if (ac_irq)
e82374fd	409	ac_wakeup_enabled = !enable_irq_wake(ac_irq->start);
8f8e9b38	410	if (usb_irq)
e82374fd	411	usb_wakeup_enabled = !enable_irq_wake(usb_irq->start);
8f8e9b38 DB	412	}
	413
	414	return 0;
	415	}
	416
	417	static int pda_power_resume(struct platform_device *pdev)
	418	{
	419	if (device_may_wakeup(&pdev->dev)) {
e82374fd	420	if (usb_irq && usb_wakeup_enabled)
8f8e9b38	421	disable_irq_wake(usb_irq->start);
e82374fd	422	if (ac_irq && ac_wakeup_enabled)
8f8e9b38 DB	423	disable_irq_wake(ac_irq->start);
	424	}
	425
	426	return 0;
	427	}
	428	#else
	429	#define pda_power_suspend NULL
	430	#define pda_power_resume NULL
	431	#endif /* CONFIG_PM */
	432
2f5a5cf9 KS	433	MODULE_ALIAS("platform:pda-power");
2f5a5cf9 KS	434
b2998049 AV	435	static struct platform_driver pda_power_pdrv = {
	436	.driver = {
	437	.name = "pda-power",
	438	},
	439	.probe = pda_power_probe,
	440	.remove = pda_power_remove,
8f8e9b38 DB	441	.suspend = pda_power_suspend,
8f8e9b38 DB	442	.resume = pda_power_resume,
b2998049 AV	443	};
	444
	445	static int __init pda_power_init(void)
	446	{
	447	return platform_driver_register(&pda_power_pdrv);
	448	}
	449
	450	static void __exit pda_power_exit(void)
	451	{
	452	platform_driver_unregister(&pda_power_pdrv);
b2998049 AV	453	}
	454
	455	module_init(pda_power_init);
	456	module_exit(pda_power_exit);
	457	MODULE_LICENSE("GPL");
	458	MODULE_AUTHOR("Anton Vorontsov <[email protected]>");