#include <linux/module.h>
#include <linux/platform_device.h>
+#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/power_supply.h>
#include <linux/pda_power.h>
+#include <linux/regulator/consumer.h>
#include <linux/timer.h>
#include <linux/jiffies.h>
+#include <linux/usb/otg.h>
static inline unsigned int get_irq_flags(struct resource *res)
{
- unsigned int flags = IRQF_DISABLED | IRQF_SHARED;
+ unsigned int flags = IRQF_SAMPLE_RANDOM | IRQF_SHARED;
flags |= res->flags & IRQF_TRIGGER_MASK;
static struct resource *ac_irq, *usb_irq;
static struct timer_list charger_timer;
static struct timer_list supply_timer;
+static struct timer_list polling_timer;
+static int polling;
+
+#ifdef CONFIG_USB_OTG_UTILS
+static struct otg_transceiver *transceiver;
+#endif
+static struct regulator *ac_draw;
enum {
PDA_PSY_OFFLINE = 0,
static void update_charger(void)
{
- if (!pdata->set_charge)
- return;
-
- 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);
+ 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;
+ }
+ }
}
}
return IRQ_HANDLED;
}
+static void polling_timer_func(unsigned long unused)
+{
+ int changed = 0;
+
+ dev_dbg(dev, "polling...\n");
+
+ update_status();
+
+ if (!ac_irq && new_ac_status != ac_status) {
+ ac_status = PDA_PSY_TO_CHANGE;
+ changed = 1;
+ }
+
+ if (!usb_irq && new_usb_status != usb_status) {
+ usb_status = PDA_PSY_TO_CHANGE;
+ changed = 1;
+ }
+
+ if (changed)
+ psy_changed();
+
+ mod_timer(&polling_timer,
+ jiffies + msecs_to_jiffies(pdata->polling_interval));
+}
+
+#ifdef CONFIG_USB_OTG_UTILS
+static int otg_is_usb_online(void)
+{
+ return (transceiver->state == OTG_STATE_B_PERIPHERAL);
+}
+#endif
+
static int pda_power_probe(struct platform_device *pdev)
{
int ret = 0;
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_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);
pda_psy_usb.num_supplicants = pdata->num_supplicants;
}
+ ac_draw = regulator_get(dev, "ac_draw");
+ if (IS_ERR(ac_draw)) {
+ dev_dbg(dev, "couldn't get ac_draw regulator\n");
+ ac_draw = NULL;
+ ret = PTR_ERR(ac_draw);
+ }
+
if (pdata->is_ac_online) {
ret = power_supply_register(&pdev->dev, &pda_psy_ac);
if (ret) {
dev_err(dev, "request ac irq failed\n");
goto ac_irq_failed;
}
+ } else {
+ polling = 1;
}
}
+#ifdef CONFIG_USB_OTG_UTILS
+ transceiver = otg_get_transceiver();
+ if (transceiver && !pdata->is_usb_online) {
+ pdata->is_usb_online = otg_is_usb_online;
+ }
+#endif
+
if (pdata->is_usb_online) {
ret = power_supply_register(&pdev->dev, &pda_psy_usb);
if (ret) {
dev_err(dev, "request usb irq failed\n");
goto usb_irq_failed;
}
+ } else {
+ polling = 1;
}
}
- device_init_wakeup(&pdev->dev, 1);
+ if (polling) {
+ dev_dbg(dev, "will poll for status\n");
+ setup_timer(&polling_timer, polling_timer_func, 0);
+ mod_timer(&polling_timer,
+ jiffies + msecs_to_jiffies(pdata->polling_interval));
+ }
+
+ if (ac_irq || usb_irq)
+ device_init_wakeup(&pdev->dev, 1);
return 0;
usb_supply_failed:
if (pdata->is_ac_online && ac_irq)
free_irq(ac_irq->start, &pda_psy_ac);
+#ifdef CONFIG_USB_OTG_UTILS
+ if (transceiver)
+ otg_put_transceiver(transceiver);
+#endif
ac_irq_failed:
if (pdata->is_ac_online)
power_supply_unregister(&pda_psy_ac);
ac_supply_failed:
+ if (ac_draw) {
+ regulator_put(ac_draw);
+ ac_draw = NULL;
+ }
+ if (pdata->exit)
+ pdata->exit(dev);
+init_failed:
wrongid:
return ret;
}
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_psy_usb);
if (pdata->is_ac_online)
power_supply_unregister(&pda_psy_ac);
+#ifdef CONFIG_USB_OTG_UTILS
+ if (transceiver)
+ otg_put_transceiver(transceiver);
+#endif
+ if (ac_draw) {
+ regulator_put(ac_draw);
+ ac_draw = NULL;
+ }
+ if (pdata->exit)
+ pdata->exit(dev);
return 0;
}
#ifdef CONFIG_PM
+static int ac_wakeup_enabled;
+static int usb_wakeup_enabled;
+
static int pda_power_suspend(struct platform_device *pdev, pm_message_t state)
{
if (device_may_wakeup(&pdev->dev)) {
if (ac_irq)
- enable_irq_wake(ac_irq->start);
+ ac_wakeup_enabled = !enable_irq_wake(ac_irq->start);
if (usb_irq)
- enable_irq_wake(usb_irq->start);
+ 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)
+ if (usb_irq && usb_wakeup_enabled)
disable_irq_wake(usb_irq->start);
- if (ac_irq)
+ if (ac_irq && ac_wakeup_enabled)
disable_irq_wake(ac_irq->start);
}
#define pda_power_resume NULL
#endif /* CONFIG_PM */
+MODULE_ALIAS("platform:pda-power");
+
static struct platform_driver pda_power_pdrv = {
.driver = {
.name = "pda-power",
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff