[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)
{
	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 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->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);
	}

#ifdef CONFIG_USB_OTG_UTILS
	transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
	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;
	}
#endif

	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;
		}
	}

#ifdef CONFIG_USB_OTG_UTILS
	if (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;

#ifdef CONFIG_USB_OTG_UTILS
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);
#ifdef CONFIG_USB_OTG_UTILS
	if (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);
#ifdef CONFIG_USB_OTG_UTILS
	if (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	{
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
1c74529d	42	#ifdef CONFIG_USB_OTG_UTILS
86753811	43	static struct usb_phy *transceiver;
9ad63986	44	static struct notifier_block otg_nb;
1c74529d AL	45	#endif
1c74529d AL	46
5bf2b994 PZ	47	static struct regulator *ac_draw;
5bf2b994 PZ	48
bfde2662 AV	49	enum {
	50	PDA_PSY_OFFLINE = 0,
	51	PDA_PSY_ONLINE = 1,
	52	PDA_PSY_TO_CHANGE,
	53	};
	54	static int new_ac_status = -1;
	55	static int new_usb_status = -1;
	56	static int ac_status = -1;
	57	static int usb_status = -1;
	58
b2998049 AV	59	static int pda_power_get_property(struct power_supply *psy,
	60	enum power_supply_property psp,
	61	union power_supply_propval *val)
	62	{
	63	switch (psp) {
	64	case POWER_SUPPLY_PROP_ONLINE:
	65	if (psy->type == POWER_SUPPLY_TYPE_MAINS)
	66	val->intval = pdata->is_ac_online ?
	67	pdata->is_ac_online() : 0;
	68	else
	69	val->intval = pdata->is_usb_online ?
	70	pdata->is_usb_online() : 0;
	71	break;
	72	default:
	73	return -EINVAL;
	74	}
	75	return 0;
	76	}
	77
	78	static enum power_supply_property pda_power_props[] = {
	79	POWER_SUPPLY_PROP_ONLINE,
	80	};
	81
	82	static char *pda_power_supplied_to[] = {
	83	"main-battery",
	84	"backup-battery",
	85	};
	86
bfde2662 AV	87	static struct power_supply pda_psy_ac = {
	88	.name = "ac",
	89	.type = POWER_SUPPLY_TYPE_MAINS,
	90	.supplied_to = pda_power_supplied_to,
	91	.num_supplicants = ARRAY_SIZE(pda_power_supplied_to),
	92	.properties = pda_power_props,
	93	.num_properties = ARRAY_SIZE(pda_power_props),
	94	.get_property = pda_power_get_property,
b2998049 AV	95	};
b2998049 AV	96
bfde2662 AV	97	static struct power_supply pda_psy_usb = {
	98	.name = "usb",
	99	.type = POWER_SUPPLY_TYPE_USB,
	100	.supplied_to = pda_power_supplied_to,
	101	.num_supplicants = ARRAY_SIZE(pda_power_supplied_to),
	102	.properties = pda_power_props,
	103	.num_properties = ARRAY_SIZE(pda_power_props),
	104	.get_property = pda_power_get_property,
	105	};
	106
	107	static void update_status(void)
	108	{
	109	if (pdata->is_ac_online)
	110	new_ac_status = !!pdata->is_ac_online();
	111
	112	if (pdata->is_usb_online)
	113	new_usb_status = !!pdata->is_usb_online();
	114	}
	115
b2998049 AV	116	static void update_charger(void)
b2998049 AV	117	{
5bf2b994 PZ	118	static int regulator_enabled;
	119	int max_uA = pdata->ac_max_uA;
	120
	121	if (pdata->set_charge) {
	122	if (new_ac_status > 0) {
	123	dev_dbg(dev, "charger on (AC)\n");
	124	pdata->set_charge(PDA_POWER_CHARGE_AC);
	125	} else if (new_usb_status > 0) {
	126	dev_dbg(dev, "charger on (USB)\n");
	127	pdata->set_charge(PDA_POWER_CHARGE_USB);
	128	} else {
	129	dev_dbg(dev, "charger off\n");
	130	pdata->set_charge(0);
	131	}
	132	} else if (ac_draw) {
	133	if (new_ac_status > 0) {
	134	regulator_set_current_limit(ac_draw, max_uA, max_uA);
	135	if (!regulator_enabled) {
	136	dev_dbg(dev, "charger on (AC)\n");
	137	regulator_enable(ac_draw);
	138	regulator_enabled = 1;
	139	}
	140	} else {
	141	if (regulator_enabled) {
	142	dev_dbg(dev, "charger off\n");
	143	regulator_disable(ac_draw);
	144	regulator_enabled = 0;
	145	}
	146	}
b2998049	147	}
b2998049 AV	148	}
b2998049 AV	149
bfde2662	150	static void supply_timer_func(unsigned long unused)
b2998049	151	{
bfde2662 AV	152	if (ac_status == PDA_PSY_TO_CHANGE) {
	153	ac_status = new_ac_status;
	154	power_supply_changed(&pda_psy_ac);
	155	}
5ebf6e6a	156
bfde2662 AV	157	if (usb_status == PDA_PSY_TO_CHANGE) {
	158	usb_status = new_usb_status;
	159	power_supply_changed(&pda_psy_usb);
	160	}
b2998049 AV	161	}
b2998049 AV	162
bfde2662	163	static void psy_changed(void)
b2998049 AV	164	{
	165	update_charger();
	166
bfde2662 AV	167	/*
	168	* Okay, charger set. Now wait a bit before notifying supplicants,
	169	* charge power should stabilize.
	170	*/
b2998049 AV	171	mod_timer(&supply_timer,
b2998049 AV	172	jiffies + msecs_to_jiffies(pdata->wait_for_charger));
b2998049 AV	173	}
b2998049 AV	174
bfde2662 AV	175	static void charger_timer_func(unsigned long unused)
	176	{
	177	update_status();
	178	psy_changed();
	179	}
	180
5ebf6e6a	181	static irqreturn_t power_changed_isr(int irq, void *power_supply)
b2998049	182	{
bfde2662 AV	183	if (power_supply == &pda_psy_ac)
	184	ac_status = PDA_PSY_TO_CHANGE;
	185	else if (power_supply == &pda_psy_usb)
	186	usb_status = PDA_PSY_TO_CHANGE;
	187	else
	188	return IRQ_NONE;
	189
	190	/*
	191	* Wait a bit before reading ac/usb line status and setting charger,
	192	* because ac/usb status readings may lag from irq.
	193	*/
b2998049 AV	194	mod_timer(&charger_timer,
b2998049 AV	195	jiffies + msecs_to_jiffies(pdata->wait_for_status));
bfde2662	196
b2998049 AV	197	return IRQ_HANDLED;
	198	}
	199
c3caebad AV	200	static void polling_timer_func(unsigned long unused)
	201	{
	202	int changed = 0;
	203
	204	dev_dbg(dev, "polling...\n");
	205
	206	update_status();
	207
	208	if (!ac_irq && new_ac_status != ac_status) {
	209	ac_status = PDA_PSY_TO_CHANGE;
	210	changed = 1;
	211	}
	212
	213	if (!usb_irq && new_usb_status != usb_status) {
	214	usb_status = PDA_PSY_TO_CHANGE;
	215	changed = 1;
	216	}
	217
	218	if (changed)
	219	psy_changed();
	220
	221	mod_timer(&polling_timer,
	222	jiffies + msecs_to_jiffies(pdata->polling_interval));
	223	}
	224
5bf2b994 PZ	225	#ifdef CONFIG_USB_OTG_UTILS
	226	static int otg_is_usb_online(void)
	227	{
9ad63986 DZ	228	return (transceiver->last_event == USB_EVENT_VBUS \|\|
	229	transceiver->last_event == USB_EVENT_ENUMERATED);
	230	}
	231
	232	static int otg_is_ac_online(void)
	233	{
	234	return (transceiver->last_event == USB_EVENT_CHARGER);
	235	}
	236
	237	static int otg_handle_notification(struct notifier_block *nb,
	238	unsigned long event, void *unused)
	239	{
	240	switch (event) {
	241	case USB_EVENT_CHARGER:
	242	ac_status = PDA_PSY_TO_CHANGE;
	243	break;
	244	case USB_EVENT_VBUS:
	245	case USB_EVENT_ENUMERATED:
	246	usb_status = PDA_PSY_TO_CHANGE;
	247	break;
	248	case USB_EVENT_NONE:
	249	ac_status = PDA_PSY_TO_CHANGE;
	250	usb_status = PDA_PSY_TO_CHANGE;
	251	break;
	252	default:
	253	return NOTIFY_OK;
	254	}
	255
	256	/*
	257	* Wait a bit before reading ac/usb line status and setting charger,
	258	* because ac/usb status readings may lag from irq.
	259	*/
	260	mod_timer(&charger_timer,
	261	jiffies + msecs_to_jiffies(pdata->wait_for_status));
	262
	263	return NOTIFY_OK;
5bf2b994 PZ	264	}
	265	#endif
	266
b2998049 AV	267	static int pda_power_probe(struct platform_device *pdev)
	268	{
	269	int ret = 0;
	270
	271	dev = &pdev->dev;
	272
	273	if (pdev->id != -1) {
	274	dev_err(dev, "it's meaningless to register several "
	275	"pda_powers; use id = -1\n");
	276	ret = -EINVAL;
	277	goto wrongid;
	278	}
	279
	280	pdata = pdev->dev.platform_data;
	281
f6b6b180 PZ	282	if (pdata->init) {
	283	ret = pdata->init(dev);
	284	if (ret < 0)
	285	goto init_failed;
	286	}
	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) {
bfde2662 AV	310	pda_psy_ac.supplied_to = pdata->supplied_to;
	311	pda_psy_ac.num_supplicants = pdata->num_supplicants;
	312	pda_psy_usb.supplied_to = pdata->supplied_to;
	313	pda_psy_usb.num_supplicants = pdata->num_supplicants;
b2998049 AV	314	}
b2998049 AV	315
5bf2b994 PZ	316	ac_draw = regulator_get(dev, "ac_draw");
	317	if (IS_ERR(ac_draw)) {
	318	dev_dbg(dev, "couldn't get ac_draw regulator\n");
	319	ac_draw = NULL;
	320	ret = PTR_ERR(ac_draw);
	321	}
	322
1c74529d	323	#ifdef CONFIG_USB_OTG_UTILS
662dca54	324	transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
9ad63986 DZ	325	if (transceiver && !pdata->is_usb_online) {
	326	pdata->is_usb_online = otg_is_usb_online;
	327	}
	328	if (transceiver && !pdata->is_ac_online) {
	329	pdata->is_ac_online = otg_is_ac_online;
	330	}
1c74529d	331	#endif
9ad63986	332
9ef45106	333	if (pdata->is_ac_online) {
bfde2662	334	ret = power_supply_register(&pdev->dev, &pda_psy_ac);
9ef45106 DB	335	if (ret) {
9ef45106 DB	336	dev_err(dev, "failed to register %s power supply\n",
bfde2662	337	pda_psy_ac.name);
9ef45106 DB	338	goto ac_supply_failed;
9ef45106 DB	339	}
b2998049	340
9ef45106 DB	341	if (ac_irq) {
	342	ret = request_irq(ac_irq->start, power_changed_isr,
	343	get_irq_flags(ac_irq), ac_irq->name,
bfde2662	344	&pda_psy_ac);
9ef45106 DB	345	if (ret) {
	346	dev_err(dev, "request ac irq failed\n");
	347	goto ac_irq_failed;
	348	}
c3caebad AV	349	} else {
c3caebad AV	350	polling = 1;
9ef45106	351	}
b2998049 AV	352	}
b2998049 AV	353
9ef45106	354	if (pdata->is_usb_online) {
bfde2662	355	ret = power_supply_register(&pdev->dev, &pda_psy_usb);
b2998049	356	if (ret) {
9ef45106	357	dev_err(dev, "failed to register %s power supply\n",
bfde2662	358	pda_psy_usb.name);
9ef45106	359	goto usb_supply_failed;
b2998049	360	}
b2998049	361
9ef45106 DB	362	if (usb_irq) {
	363	ret = request_irq(usb_irq->start, power_changed_isr,
	364	get_irq_flags(usb_irq),
bfde2662	365	usb_irq->name, &pda_psy_usb);
9ef45106 DB	366	if (ret) {
	367	dev_err(dev, "request usb irq failed\n");
	368	goto usb_irq_failed;
	369	}
c3caebad AV	370	} else {
c3caebad AV	371	polling = 1;
b2998049 AV	372	}
	373	}
	374
1c74529d	375	#ifdef CONFIG_USB_OTG_UTILS
9ad63986 DZ	376	if (transceiver && pdata->use_otg_notifier) {
9ad63986 DZ	377	otg_nb.notifier_call = otg_handle_notification;
fcc8ebc9	378	ret = usb_register_notifier(transceiver, &otg_nb);
9ad63986 DZ	379	if (ret) {
	380	dev_err(dev, "failure to register otg notifier\n");
	381	goto otg_reg_notifier_failed;
	382	}
	383	polling = 0;
	384	}
1c74529d	385	#endif
9ad63986	386
c3caebad AV	387	if (polling) {
	388	dev_dbg(dev, "will poll for status\n");
	389	setup_timer(&polling_timer, polling_timer_func, 0);
	390	mod_timer(&polling_timer,
	391	jiffies + msecs_to_jiffies(pdata->polling_interval));
	392	}
	393
	394	if (ac_irq \|\| usb_irq)
	395	device_init_wakeup(&pdev->dev, 1);
8f8e9b38	396
9ef45106	397	return 0;
b2998049	398
1c74529d	399	#ifdef CONFIG_USB_OTG_UTILS
9ad63986 DZ	400	otg_reg_notifier_failed:
	401	if (pdata->is_usb_online && usb_irq)
	402	free_irq(usb_irq->start, &pda_psy_usb);
1c74529d	403	#endif
b2998049	404	usb_irq_failed:
9ef45106	405	if (pdata->is_usb_online)
bfde2662	406	power_supply_unregister(&pda_psy_usb);
9ef45106 DB	407	usb_supply_failed:
9ef45106 DB	408	if (pdata->is_ac_online && ac_irq)
bfde2662	409	free_irq(ac_irq->start, &pda_psy_ac);
1c74529d	410	#ifdef CONFIG_USB_OTG_UTILS
5bf2b994	411	if (transceiver)
721002ec	412	usb_put_phy(transceiver);
1c74529d	413	#endif
b2998049	414	ac_irq_failed:
9ef45106	415	if (pdata->is_ac_online)
bfde2662	416	power_supply_unregister(&pda_psy_ac);
9ef45106	417	ac_supply_failed:
5bf2b994 PZ	418	if (ac_draw) {
	419	regulator_put(ac_draw);
	420	ac_draw = NULL;
	421	}
f6b6b180 PZ	422	if (pdata->exit)
	423	pdata->exit(dev);
	424	init_failed:
b2998049	425	wrongid:
b2998049 AV	426	return ret;
	427	}
	428
	429	static int pda_power_remove(struct platform_device *pdev)
	430	{
9ef45106	431	if (pdata->is_usb_online && usb_irq)
bfde2662	432	free_irq(usb_irq->start, &pda_psy_usb);
9ef45106	433	if (pdata->is_ac_online && ac_irq)
bfde2662 AV	434	free_irq(ac_irq->start, &pda_psy_ac);
bfde2662 AV	435
c3caebad AV	436	if (polling)
c3caebad AV	437	del_timer_sync(&polling_timer);
b2998049 AV	438	del_timer_sync(&charger_timer);
b2998049 AV	439	del_timer_sync(&supply_timer);
bfde2662	440
9ef45106	441	if (pdata->is_usb_online)
bfde2662	442	power_supply_unregister(&pda_psy_usb);
9ef45106	443	if (pdata->is_ac_online)
bfde2662	444	power_supply_unregister(&pda_psy_ac);
5bf2b994 PZ	445	#ifdef CONFIG_USB_OTG_UTILS
5bf2b994 PZ	446	if (transceiver)
721002ec	447	usb_put_phy(transceiver);
5bf2b994 PZ	448	#endif
	449	if (ac_draw) {
	450	regulator_put(ac_draw);
	451	ac_draw = NULL;
	452	}
f6b6b180 PZ	453	if (pdata->exit)
f6b6b180 PZ	454	pdata->exit(dev);
bfde2662	455
b2998049 AV	456	return 0;
	457	}
	458
8f8e9b38	459	#ifdef CONFIG_PM
e82374fd RJ	460	static int ac_wakeup_enabled;
	461	static int usb_wakeup_enabled;
	462
8f8e9b38 DB	463	static int pda_power_suspend(struct platform_device *pdev, pm_message_t state)
8f8e9b38 DB	464	{
a3bcbbee DM	465	if (pdata->suspend) {
	466	int ret = pdata->suspend(state);
	467
	468	if (ret)
	469	return ret;
	470	}
	471
8f8e9b38 DB	472	if (device_may_wakeup(&pdev->dev)) {
8f8e9b38 DB	473	if (ac_irq)
e82374fd	474	ac_wakeup_enabled = !enable_irq_wake(ac_irq->start);
8f8e9b38	475	if (usb_irq)
e82374fd	476	usb_wakeup_enabled = !enable_irq_wake(usb_irq->start);
8f8e9b38 DB	477	}
	478
	479	return 0;
	480	}
	481
	482	static int pda_power_resume(struct platform_device *pdev)
	483	{
	484	if (device_may_wakeup(&pdev->dev)) {
e82374fd	485	if (usb_irq && usb_wakeup_enabled)
8f8e9b38	486	disable_irq_wake(usb_irq->start);
e82374fd	487	if (ac_irq && ac_wakeup_enabled)
8f8e9b38 DB	488	disable_irq_wake(ac_irq->start);
	489	}
	490
a3bcbbee DM	491	if (pdata->resume)
	492	return pdata->resume();
	493
8f8e9b38 DB	494	return 0;
	495	}
	496	#else
	497	#define pda_power_suspend NULL
	498	#define pda_power_resume NULL
	499	#endif /* CONFIG_PM */
	500
b2998049 AV	501	static struct platform_driver pda_power_pdrv = {
	502	.driver = {
	503	.name = "pda-power",
	504	},
	505	.probe = pda_power_probe,
	506	.remove = pda_power_remove,
8f8e9b38 DB	507	.suspend = pda_power_suspend,
8f8e9b38 DB	508	.resume = pda_power_resume,
b2998049 AV	509	};
b2998049 AV	510
300bac7f	511	module_platform_driver(pda_power_pdrv);
b2998049	512
b2998049 AV	513	MODULE_LICENSE("GPL");
b2998049 AV	514	MODULE_AUTHOR("Anton Vorontsov <cbou@mail.ru>");
300bac7f	515	MODULE_ALIAS("platform:pda-power");