diff options
Diffstat (limited to 'drivers/hid/hid-wiimote.c')
| -rw-r--r-- | drivers/hid/hid-wiimote.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/drivers/hid/hid-wiimote.c b/drivers/hid/hid-wiimote.c index 48198cb0fed2..c83cafaa46a3 100644 --- a/drivers/hid/hid-wiimote.c +++ b/drivers/hid/hid-wiimote.c @@ -17,6 +17,7 @@ #include <linux/leds.h> #include <linux/module.h> #include <linux/mutex.h> +#include <linux/power_supply.h> #include <linux/spinlock.h> #include "hid-ids.h" @@ -51,6 +52,7 @@ struct wiimote_data { struct led_classdev *leds[4]; struct input_dev *accel; struct input_dev *ir; + struct power_supply battery; spinlock_t qlock; __u8 head; @@ -133,6 +135,10 @@ static __u16 wiiproto_keymap[] = { BTN_MODE, /* WIIPROTO_KEY_HOME */ }; +static enum power_supply_property wiimote_battery_props[] = { + POWER_SUPPLY_PROP_CAPACITY +}; + /* requires the state.lock spinlock to be held */ static inline bool wiimote_cmd_pending(struct wiimote_data *wdata, int cmd, __u32 opt) @@ -453,6 +459,43 @@ static int wiimote_cmd_write(struct wiimote_data *wdata, __u32 offset, return ret; } +static int wiimote_battery_get_property(struct power_supply *psy, + enum power_supply_property psp, + union power_supply_propval *val) +{ + struct wiimote_data *wdata = container_of(psy, + struct wiimote_data, battery); + int ret = 0, state; + unsigned long flags; + + ret = wiimote_cmd_acquire(wdata); + if (ret) + return ret; + + spin_lock_irqsave(&wdata->state.lock, flags); + wiimote_cmd_set(wdata, WIIPROTO_REQ_SREQ, 0); + wiiproto_req_status(wdata); + spin_unlock_irqrestore(&wdata->state.lock, flags); + + ret = wiimote_cmd_wait(wdata); + state = wdata->state.cmd_battery; + wiimote_cmd_release(wdata); + + if (ret) + return ret; + + switch (psp) { + case POWER_SUPPLY_PROP_CAPACITY: + val->intval = state * 100 / 255; + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + static int wiimote_init_ir(struct wiimote_data *wdata, __u16 mode) { int ret; @@ -1155,6 +1198,7 @@ static void wiimote_destroy(struct wiimote_data *wdata) { wiimote_leds_destroy(wdata); + power_supply_unregister(&wdata->battery); input_unregister_device(wdata->accel); input_unregister_device(wdata->ir); input_unregister_device(wdata->input); @@ -1206,6 +1250,19 @@ static int wiimote_hid_probe(struct hid_device *hdev, goto err_input; } + wdata->battery.properties = wiimote_battery_props; + wdata->battery.num_properties = ARRAY_SIZE(wiimote_battery_props); + wdata->battery.get_property = wiimote_battery_get_property; + wdata->battery.name = "wiimote_battery"; + wdata->battery.type = POWER_SUPPLY_TYPE_BATTERY; + wdata->battery.use_for_apm = 0; + + ret = power_supply_register(&wdata->hdev->dev, &wdata->battery); + if (ret) { + hid_err(hdev, "Cannot register battery device\n"); + goto err_battery; + } + ret = wiimote_leds_create(wdata); if (ret) goto err_free; @@ -1223,6 +1280,9 @@ err_free: wiimote_destroy(wdata); return ret; +err_battery: + input_unregister_device(wdata->input); + wdata->input = NULL; err_input: input_unregister_device(wdata->ir); wdata->ir = NULL; |