[mirror_ubuntu-bionic-kernel.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;

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