#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,
+ 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,
"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 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)
{
- if (!pdata->set_charge)
- return;
-
- 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 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 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));
+}
+
+#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_status)
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;
+ }
+
+ 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_power_supplies[0]);
+ ret = power_supply_register(&pdev->dev, &pda_psy_ac);
if (ret) {
dev_err(dev, "failed to register %s power supply\n",
- pda_power_supplies[0].name);
+ 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_power_supplies[0]);
+ &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_power_supplies[1]);
+ ret = power_supply_register(&pdev->dev, &pda_psy_usb);
if (ret) {
dev_err(dev, "failed to register %s power supply\n",
- pda_power_supplies[1].name);
+ 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_power_supplies[1]);
+ usb_irq->name, &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_irq_failed:
if (pdata->is_usb_online)
- power_supply_unregister(&pda_power_supplies[1]);
+ power_supply_unregister(&pda_psy_usb);
usb_supply_failed:
if (pdata->is_ac_online && ac_irq)
- free_irq(ac_irq->start, &pda_power_supplies[0]);
+ 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_power_supplies[0]);
+ power_supply_unregister(&pda_psy_ac);
ac_supply_failed:
-noirqs:
+ 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_power_supplies[1]);
+ free_irq(usb_irq->start, &pda_psy_usb);
if (pdata->is_ac_online && ac_irq)
- free_irq(ac_irq->start, &pda_power_supplies[0]);
+ 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_power_supplies[1]);
+ power_supply_unregister(&pda_psy_usb);
if (pdata->is_ac_online)
- power_supply_unregister(&pda_power_supplies[0]);
+ 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