Add sysfs files for each led of the wiimote. Writing 1 to the file
enables the led and 0 disables the led.
Signed-off-by: David Herrmann <dh.herrmann@xxxxxxxxxxxxxx>
---
drivers/hid/hid-wiimote.c | 74 +++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 74 insertions(+), 0 deletions(-)
diff --git a/drivers/hid/hid-wiimote.c b/drivers/hid/hid-wiimote.c
index eb86c5d..0d93d93 100644
--- a/drivers/hid/hid-wiimote.c
+++ b/drivers/hid/hid-wiimote.c
@@ -87,6 +87,9 @@ static __u16 wiiproto_keymap[] = {
BTN_MODE, /* WIIPROTO_KEY_HOME */
};
+#define dev_to_wii(pdev) hid_get_drvdata(container_of(pdev, struct hid_device, \
+ dev))
+
static ssize_t wiimote_hid_send(struct hid_device *hdev, __u8 *buffer,
size_t count)
{
@@ -193,6 +196,55 @@ static void wiiproto_req_leds(struct wiimote_data *wdata, int leds)
wiimote_queue(wdata, cmd, sizeof(cmd));
}
+#define wiifs_led_show_set(num) \
+static ssize_t wiifs_led_show_##num(struct device *dev, \
+ struct device_attribute *attr, char *buf) \
+{ \
+ struct wiimote_data *wdata = dev_to_wii(dev); \
+ unsigned long flags; \
+ int state; \
+ \
+ if (!atomic_read(&wdata->ready)) \
+ return -EBUSY; \
+ \
+ spin_lock_irqsave(&wdata->state.lock, flags); \
+ state = !!(wdata->state.flags & WIIPROTO_FLAG_LED##num); \
+ spin_unlock_irqrestore(&wdata->state.lock, flags); \
+ \
+ return sprintf(buf, "%d\n", state); \
+} \
+static ssize_t wiifs_led_set_##num(struct device *dev, \
+ struct device_attribute *attr, const char *buf, size_t count) \
+{ \
+ struct wiimote_data *wdata = dev_to_wii(dev); \
+ int tmp = simple_strtoul(buf, NULL, 10); \
+ unsigned long flags; \
+ __u8 state; \
+ \
+ if (!atomic_read(&wdata->ready)) \
+ return -EBUSY; \
+ \
+ spin_lock_irqsave(&wdata->state.lock, flags); \
+ \
+ state = wdata->state.flags; \
+ \
+ if (tmp) \
+ wiiproto_req_leds(wdata, state | WIIPROTO_FLAG_LED##num);\
+ else \
+ wiiproto_req_leds(wdata, state & ~WIIPROTO_FLAG_LED##num);\
+ \
+ spin_unlock_irqrestore(&wdata->state.lock, flags); \
+ \
+ return count; \
+} \
+static DEVICE_ATTR(led##num, S_IRUGO | S_IWUSR, wiifs_led_show_##num, \
+ wiifs_led_set_##num)
+
+wiifs_led_show_set(1);
+wiifs_led_show_set(2);
+wiifs_led_show_set(3);
+wiifs_led_show_set(4);
+
static int wiimote_input_event(struct input_dev *dev, unsigned int type,
unsigned int code, int value)
{
@@ -320,6 +372,19 @@ static int wiimote_hid_probe(struct hid_device *hdev,
return -ENOMEM;
}
+ ret = device_create_file(&hdev->dev, &dev_attr_led1);
+ if (ret)
+ goto err;
+ ret = device_create_file(&hdev->dev, &dev_attr_led2);
+ if (ret)
+ goto err;
+ ret = device_create_file(&hdev->dev, &dev_attr_led3);
+ if (ret)
+ goto err;
+ ret = device_create_file(&hdev->dev, &dev_attr_led4);
+ if (ret)
+ goto err;
+
ret = hid_parse(hdev);
if (ret) {
hid_err(hdev, "HID parse failed\n");
@@ -352,6 +417,10 @@ err_stop:
hid_hw_stop(hdev);
err:
input_free_device(wdata->input);
+ device_remove_file(&hdev->dev, &dev_attr_led1);
+ device_remove_file(&hdev->dev, &dev_attr_led2);
+ device_remove_file(&hdev->dev, &dev_attr_led3);
+ device_remove_file(&hdev->dev, &dev_attr_led4);
kfree(wdata);
return ret;
}
@@ -370,6 +439,11 @@ static void wiimote_hid_remove(struct hid_device *hdev)
* the device data.
*/
+ device_remove_file(&hdev->dev, &dev_attr_led1);
+ device_remove_file(&hdev->dev, &dev_attr_led2);
+ device_remove_file(&hdev->dev, &dev_attr_led3);
+ device_remove_file(&hdev->dev, &dev_attr_led4);
+
atomic_set(&wdata->ready, 0);
cancel_work_sync(&wdata->worker);
--
1.7.5.2
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