1 files changed, 358 insertions, 103 deletions

diff --git a/drivers/power/pda_power.c b/drivers/power/pda_power.c
index c058f285be1..0c52e2a0d90 100644
--- a/drivers/power/pda_power.c
+++ b/drivers/power/pda_power.c
@@ -12,19 +12,19 @@
 
 #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_DISABLED | IRQF_SHARED;
-
-	flags |= res->flags & IRQF_TRIGGER_MASK;
-
-	return flags;
+	return IRQF_SHARED | (res->flags & IRQF_TRIGGER_MASK);
 }
 
 static struct device *dev;
@@ -32,6 +32,25 @@ 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,
@@ -61,72 +80,186 @@ static char *pda_power_supplied_to[] = {
 	"backup-battery",
 };
 
-static struct power_supply pda_power_supplies[] = {
-	{
-		.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,
-	},
-	{
-		.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 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 void update_charger(void)
+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->set_charge)
-		return;
+	if (pdata->is_ac_online)
+		new_ac_status = !!pdata->is_ac_online();
+
+	if (pdata->is_usb_online)
+		new_usb_status = !!pdata->is_usb_online();
+}
 
-	if (pdata->is_ac_online && pdata->is_ac_online()) {
-		dev_dbg(dev, "charger on (AC)\n");
-		pdata->set_charge(PDA_POWER_CHARGE_AC);
-	} else if (pdata->is_usb_online && pdata->is_usb_online()) {
-		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);
+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 power_supply_ptr)
+static void supply_timer_func(unsigned long unused)
 {
-	void *power_supply = (void *)power_supply_ptr;
+	if (ac_status == PDA_PSY_TO_CHANGE) {
+		ac_status = new_ac_status;
+		power_supply_changed(&pda_psy_ac);
+	}
 
-	power_supply_changed(power_supply);
+	if (usb_status == PDA_PSY_TO_CHANGE) {
+		usb_status = new_usb_status;
+		power_supply_changed(&pda_psy_usb);
+	}
 }
 
-static void charger_timer_func(unsigned long power_supply_ptr)
+static void psy_changed(void)
 {
 	update_charger();
 
-	/* Okay, charger set. Now wait a bit before notifying supplicants,
-	 * charge power should stabilize. */
-	supply_timer.data = power_supply_ptr;
+	/*
+	 * 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)
 {
-	/* Wait a bit before reading ac/usb line status and setting charger,
-	 * because ac/usb status readings may lag from irq. */
-	charger_timer.data = (unsigned long)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)
 {
 	int ret = 0;
@@ -142,6 +275,19 @@ static int pda_power_probe(struct platform_device *pdev)
 
 	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)
@@ -150,106 +296,215 @@ static int pda_power_probe(struct platform_device *pdev)
 	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 (!ac_irq && !usb_irq) {
-		dev_err(dev, "no ac/usb irq specified\n");
-		ret = -ENODEV;
-		goto noirqs;
-	}
 
 	if (pdata->supplied_to) {
-		pda_power_supplies[0].supplied_to = pdata->supplied_to;
-		pda_power_supplies[1].supplied_to = pdata->supplied_to;
-		pda_power_supplies[0].num_supplicants = pdata->num_supplicants;
-		pda_power_supplies[1].num_supplicants = pdata->num_supplicants;
+		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;
 	}
 
-	ret = power_supply_register(&pdev->dev, &pda_power_supplies[0]);
-	if (ret) {
-		dev_err(dev, "failed to register %s power supply\n",
-			pda_power_supplies[0].name);
-		goto supply0_failed;
+#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);
+		if (ret) {
+			dev_err(dev, "failed to register %s power supply\n",
+				pda_psy_ac.name);
+			goto ac_supply_failed;
+		}
 
-	ret = power_supply_register(&pdev->dev, &pda_power_supplies[1]);
-	if (ret) {
-		dev_err(dev, "failed to register %s power supply\n",
-			pda_power_supplies[1].name);
-		goto supply1_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 (ac_irq) {
-		ret = request_irq(ac_irq->start, power_changed_isr,
-				  get_irq_flags(ac_irq), ac_irq->name,
-				  &pda_power_supplies[0]);
+	if (pdata->is_usb_online) {
+		ret = power_supply_register(&pdev->dev, &pda_psy_usb);
 		if (ret) {
-			dev_err(dev, "request ac irq failed\n");
-			goto ac_irq_failed;
+			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 (usb_irq) {
-		ret = request_irq(usb_irq->start, power_changed_isr,
-				  get_irq_flags(usb_irq), usb_irq->name,
-				  &pda_power_supplies[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, "request usb irq failed\n");
-			goto usb_irq_failed;
+			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));
 	}
 
-	goto success;
+	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 (ac_irq)
-		free_irq(ac_irq->start, &pda_power_supplies[0]);
+	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:
-	power_supply_unregister(&pda_power_supplies[1]);
-supply1_failed:
-	power_supply_unregister(&pda_power_supplies[0]);
-supply0_failed:
-noirqs:
+	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:
-success:
 	return ret;
 }
 
 static int pda_power_remove(struct platform_device *pdev)
 {
-	if (usb_irq)
-		free_irq(usb_irq->start, &pda_power_supplies[1]);
-	if (ac_irq)
-		free_irq(ac_irq->start, &pda_power_supplies[0]);
+	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);
-	power_supply_unregister(&pda_power_supplies[1]);
-	power_supply_unregister(&pda_power_supplies[0]);
+
+	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,
 };
 
-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_platform_driver(pda_power_pdrv);
 
-module_init(pda_power_init);
-module_exit(pda_power_exit);
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Anton Vorontsov <cbou@mail.ru>");
+MODULE_ALIAS("platform:pda-power");