[deliverable/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 <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)
{
	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;

static struct otg_transceiver *transceiver;
static struct notifier_block otg_nb;
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->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)
{
	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);
	}

	transceiver = otg_get_transceiver();
	if (transceiver && !pdata->is_usb_online) {
		pdata->is_usb_online = otg_is_usb_online;
	}
	if (transceiver && !pdata->is_ac_online) {
		pdata->is_ac_online = otg_is_ac_online;
	}

	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;
		}
	}

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

	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;

otg_reg_notifier_failed:
	if (pdata->is_usb_online && usb_irq)
		free_irq(usb_irq->start, &pda_psy_usb);
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 (transceiver)
		otg_put_transceiver(transceiver);
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 (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 */

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 <cbou@mail.ru>");
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	{
74194cc7	27	unsigned int flags = IRQF_SAMPLE_RANDOM \| IRQF_SHARED;
b2998049 AV	28
	29	flags \|= res->flags & IRQF_TRIGGER_MASK;
	30
	31	return flags;
	32	}
	33
	34	static struct device *dev;
	35	static struct pda_power_pdata *pdata;
	36	static struct resource ac_irq, usb_irq;
	37	static struct timer_list charger_timer;
	38	static struct timer_list supply_timer;
c3caebad AV	39	static struct timer_list polling_timer;
c3caebad AV	40	static int polling;
b2998049	41
5bf2b994	42	static struct otg_transceiver *transceiver;
9ad63986	43	static struct notifier_block otg_nb;
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:
	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	{
9ad63986 DZ	225	return (transceiver->last_event == USB_EVENT_VBUS \|\|
	226	transceiver->last_event == USB_EVENT_ENUMERATED);
	227	}
	228
	229	static int otg_is_ac_online(void)
	230	{
	231	return (transceiver->last_event == USB_EVENT_CHARGER);
	232	}
	233
	234	static int otg_handle_notification(struct notifier_block *nb,
	235	unsigned long event, void *unused)
	236	{
	237	switch (event) {
	238	case USB_EVENT_CHARGER:
	239	ac_status = PDA_PSY_TO_CHANGE;
	240	break;
	241	case USB_EVENT_VBUS:
	242	case USB_EVENT_ENUMERATED:
	243	usb_status = PDA_PSY_TO_CHANGE;
	244	break;
	245	case USB_EVENT_NONE:
	246	ac_status = PDA_PSY_TO_CHANGE;
	247	usb_status = PDA_PSY_TO_CHANGE;
	248	break;
	249	default:
	250	return NOTIFY_OK;
	251	}
	252
	253	/*
	254	* Wait a bit before reading ac/usb line status and setting charger,
	255	* because ac/usb status readings may lag from irq.
	256	*/
	257	mod_timer(&charger_timer,
	258	jiffies + msecs_to_jiffies(pdata->wait_for_status));
	259
	260	return NOTIFY_OK;
5bf2b994 PZ	261	}
	262	#endif
	263
b2998049 AV	264	static int pda_power_probe(struct platform_device *pdev)
	265	{
	266	int ret = 0;
	267
	268	dev = &pdev->dev;
	269
	270	if (pdev->id != -1) {
	271	dev_err(dev, "it's meaningless to register several "
	272	"pda_powers; use id = -1\n");
	273	ret = -EINVAL;
	274	goto wrongid;
	275	}
	276
	277	pdata = pdev->dev.platform_data;
	278
f6b6b180 PZ	279	if (pdata->init) {
	280	ret = pdata->init(dev);
	281	if (ret < 0)
	282	goto init_failed;
	283	}
	284
bfde2662	285	update_status();
b2998049 AV	286	update_charger();
	287
	288	if (!pdata->wait_for_status)
	289	pdata->wait_for_status = 500;
	290
	291	if (!pdata->wait_for_charger)
	292	pdata->wait_for_charger = 500;
	293
c3caebad AV	294	if (!pdata->polling_interval)
	295	pdata->polling_interval = 2000;
	296
5bf2b994 PZ	297	if (!pdata->ac_max_uA)
	298	pdata->ac_max_uA = 500000;
	299
b2998049 AV	300	setup_timer(&charger_timer, charger_timer_func, 0);
	301	setup_timer(&supply_timer, supply_timer_func, 0);
	302
	303	ac_irq = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "ac");
	304	usb_irq = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "usb");
b2998049 AV	305
b2998049 AV	306	if (pdata->supplied_to) {
bfde2662 AV	307	pda_psy_ac.supplied_to = pdata->supplied_to;
	308	pda_psy_ac.num_supplicants = pdata->num_supplicants;
	309	pda_psy_usb.supplied_to = pdata->supplied_to;
	310	pda_psy_usb.num_supplicants = pdata->num_supplicants;
b2998049 AV	311	}
b2998049 AV	312
5bf2b994 PZ	313	ac_draw = regulator_get(dev, "ac_draw");
	314	if (IS_ERR(ac_draw)) {
	315	dev_dbg(dev, "couldn't get ac_draw regulator\n");
	316	ac_draw = NULL;
	317	ret = PTR_ERR(ac_draw);
	318	}
	319
9ad63986 DZ	320	transceiver = otg_get_transceiver();
	321	if (transceiver && !pdata->is_usb_online) {
	322	pdata->is_usb_online = otg_is_usb_online;
	323	}
	324	if (transceiver && !pdata->is_ac_online) {
	325	pdata->is_ac_online = otg_is_ac_online;
	326	}
	327
9ef45106	328	if (pdata->is_ac_online) {
bfde2662	329	ret = power_supply_register(&pdev->dev, &pda_psy_ac);
9ef45106 DB	330	if (ret) {
9ef45106 DB	331	dev_err(dev, "failed to register %s power supply\n",
bfde2662	332	pda_psy_ac.name);
9ef45106 DB	333	goto ac_supply_failed;
9ef45106 DB	334	}
b2998049	335
9ef45106 DB	336	if (ac_irq) {
	337	ret = request_irq(ac_irq->start, power_changed_isr,
	338	get_irq_flags(ac_irq), ac_irq->name,
bfde2662	339	&pda_psy_ac);
9ef45106 DB	340	if (ret) {
	341	dev_err(dev, "request ac irq failed\n");
	342	goto ac_irq_failed;
	343	}
c3caebad AV	344	} else {
c3caebad AV	345	polling = 1;
9ef45106	346	}
b2998049 AV	347	}
b2998049 AV	348
9ef45106	349	if (pdata->is_usb_online) {
bfde2662	350	ret = power_supply_register(&pdev->dev, &pda_psy_usb);
b2998049	351	if (ret) {
9ef45106	352	dev_err(dev, "failed to register %s power supply\n",
bfde2662	353	pda_psy_usb.name);
9ef45106	354	goto usb_supply_failed;
b2998049	355	}
b2998049	356
9ef45106 DB	357	if (usb_irq) {
	358	ret = request_irq(usb_irq->start, power_changed_isr,
	359	get_irq_flags(usb_irq),
bfde2662	360	usb_irq->name, &pda_psy_usb);
9ef45106 DB	361	if (ret) {
	362	dev_err(dev, "request usb irq failed\n");
	363	goto usb_irq_failed;
	364	}
c3caebad AV	365	} else {
c3caebad AV	366	polling = 1;
b2998049 AV	367	}
	368	}
	369
9ad63986 DZ	370	if (transceiver && pdata->use_otg_notifier) {
	371	otg_nb.notifier_call = otg_handle_notification;
	372	ret = otg_register_notifier(transceiver, &otg_nb);
	373	if (ret) {
	374	dev_err(dev, "failure to register otg notifier\n");
	375	goto otg_reg_notifier_failed;
	376	}
	377	polling = 0;
	378	}
	379
c3caebad AV	380	if (polling) {
	381	dev_dbg(dev, "will poll for status\n");
	382	setup_timer(&polling_timer, polling_timer_func, 0);
	383	mod_timer(&polling_timer,
	384	jiffies + msecs_to_jiffies(pdata->polling_interval));
	385	}
	386
	387	if (ac_irq \|\| usb_irq)
	388	device_init_wakeup(&pdev->dev, 1);
8f8e9b38	389
9ef45106	390	return 0;
b2998049	391
9ad63986 DZ	392	otg_reg_notifier_failed:
	393	if (pdata->is_usb_online && usb_irq)
	394	free_irq(usb_irq->start, &pda_psy_usb);
b2998049	395	usb_irq_failed:
9ef45106	396	if (pdata->is_usb_online)
bfde2662	397	power_supply_unregister(&pda_psy_usb);
9ef45106 DB	398	usb_supply_failed:
9ef45106 DB	399	if (pdata->is_ac_online && ac_irq)
bfde2662	400	free_irq(ac_irq->start, &pda_psy_ac);
5bf2b994 PZ	401	if (transceiver)
5bf2b994 PZ	402	otg_put_transceiver(transceiver);
b2998049	403	ac_irq_failed:
9ef45106	404	if (pdata->is_ac_online)
bfde2662	405	power_supply_unregister(&pda_psy_ac);
9ef45106	406	ac_supply_failed:
5bf2b994 PZ	407	if (ac_draw) {
	408	regulator_put(ac_draw);
	409	ac_draw = NULL;
	410	}
f6b6b180 PZ	411	if (pdata->exit)
	412	pdata->exit(dev);
	413	init_failed:
b2998049	414	wrongid:
b2998049 AV	415	return ret;
	416	}
	417
	418	static int pda_power_remove(struct platform_device *pdev)
	419	{
9ef45106	420	if (pdata->is_usb_online && usb_irq)
bfde2662	421	free_irq(usb_irq->start, &pda_psy_usb);
9ef45106	422	if (pdata->is_ac_online && ac_irq)
bfde2662 AV	423	free_irq(ac_irq->start, &pda_psy_ac);
bfde2662 AV	424
c3caebad AV	425	if (polling)
c3caebad AV	426	del_timer_sync(&polling_timer);
b2998049 AV	427	del_timer_sync(&charger_timer);
b2998049 AV	428	del_timer_sync(&supply_timer);
bfde2662	429
9ef45106	430	if (pdata->is_usb_online)
bfde2662	431	power_supply_unregister(&pda_psy_usb);
9ef45106	432	if (pdata->is_ac_online)
bfde2662	433	power_supply_unregister(&pda_psy_ac);
5bf2b994 PZ	434	#ifdef CONFIG_USB_OTG_UTILS
	435	if (transceiver)
	436	otg_put_transceiver(transceiver);
	437	#endif
	438	if (ac_draw) {
	439	regulator_put(ac_draw);
	440	ac_draw = NULL;
	441	}
f6b6b180 PZ	442	if (pdata->exit)
f6b6b180 PZ	443	pdata->exit(dev);
bfde2662	444
b2998049 AV	445	return 0;
	446	}
	447
8f8e9b38	448	#ifdef CONFIG_PM
e82374fd RJ	449	static int ac_wakeup_enabled;
	450	static int usb_wakeup_enabled;
	451
8f8e9b38 DB	452	static int pda_power_suspend(struct platform_device *pdev, pm_message_t state)
8f8e9b38 DB	453	{
a3bcbbee DM	454	if (pdata->suspend) {
	455	int ret = pdata->suspend(state);
	456
	457	if (ret)
	458	return ret;
	459	}
	460
8f8e9b38 DB	461	if (device_may_wakeup(&pdev->dev)) {
8f8e9b38 DB	462	if (ac_irq)
e82374fd	463	ac_wakeup_enabled = !enable_irq_wake(ac_irq->start);
8f8e9b38	464	if (usb_irq)
e82374fd	465	usb_wakeup_enabled = !enable_irq_wake(usb_irq->start);
8f8e9b38 DB	466	}
	467
	468	return 0;
	469	}
	470
	471	static int pda_power_resume(struct platform_device *pdev)
	472	{
	473	if (device_may_wakeup(&pdev->dev)) {
e82374fd	474	if (usb_irq && usb_wakeup_enabled)
8f8e9b38	475	disable_irq_wake(usb_irq->start);
e82374fd	476	if (ac_irq && ac_wakeup_enabled)
8f8e9b38 DB	477	disable_irq_wake(ac_irq->start);
	478	}
	479
a3bcbbee DM	480	if (pdata->resume)
	481	return pdata->resume();
	482
8f8e9b38 DB	483	return 0;
	484	}
	485	#else
	486	#define pda_power_suspend NULL
	487	#define pda_power_resume NULL
	488	#endif /* CONFIG_PM */
	489
2f5a5cf9 KS	490	MODULE_ALIAS("platform:pda-power");
2f5a5cf9 KS	491
b2998049 AV	492	static struct platform_driver pda_power_pdrv = {
	493	.driver = {
	494	.name = "pda-power",
	495	},
	496	.probe = pda_power_probe,
	497	.remove = pda_power_remove,
8f8e9b38 DB	498	.suspend = pda_power_suspend,
8f8e9b38 DB	499	.resume = pda_power_resume,
b2998049 AV	500	};
	501
	502	static int __init pda_power_init(void)
	503	{
	504	return platform_driver_register(&pda_power_pdrv);
	505	}
	506
	507	static void __exit pda_power_exit(void)
	508	{
	509	platform_driver_unregister(&pda_power_pdrv);
b2998049 AV	510	}
	511
	512	module_init(pda_power_init);
	513	module_exit(pda_power_exit);
	514	MODULE_LICENSE("GPL");
	515	MODULE_AUTHOR("Anton Vorontsov <cbou@mail.ru>");