Add "rumble" attribute to sysfs for every wiimote to allow userspace to control
the rumble motor of a wiimote.
Signed-off-by: David Herrmann <dh.herrmann@xxxxxxxxxxxxxx>
---
Documentation/ABI/testing/sysfs-driver-hid-wiimote | 8 ++++
drivers/hid/hid-wiimote.c | 42 ++++++++++++++++++++
2 files changed, 50 insertions(+), 0 deletions(-)
diff --git a/Documentation/ABI/testing/sysfs-driver-hid-wiimote b/Documentation/ABI/testing/sysfs-driver-hid-wiimote
index 5d5a16e..235dd47 100644
--- a/Documentation/ABI/testing/sysfs-driver-hid-wiimote
+++ b/Documentation/ABI/testing/sysfs-driver-hid-wiimote
@@ -8,3 +8,11 @@ Contact: David Herrmann <dh.herrmann@xxxxxxxxxxxxxx>
Description: Make it possible to set/get current led state. Reading from it
returns 0 if led is off and 1 if it is on. Writing 0 to it
disables the led, writing 1 enables it.
+
+What: /sys/bus/hid/drivers/wiimote/<dev>/rumble
+Date: July 2011
+KernelVersion: 3.2
+Contact: David Herrmann <dh.herrmann@xxxxxxxxxxxxxx>
+Description: Writing 1 to this file enables the rumble motor on the wiimote
+ and writing 0 disables it again. Reading from this file returns
+ 1 if rumble is on and 0 if it is off.
diff --git a/drivers/hid/hid-wiimote.c b/drivers/hid/hid-wiimote.c
index 6fa73c7..4070060 100644
--- a/drivers/hid/hid-wiimote.c
+++ b/drivers/hid/hid-wiimote.c
@@ -277,6 +277,43 @@ wiifs_led_show_set(2);
wiifs_led_show_set(3);
wiifs_led_show_set(4);
+static ssize_t wiifs_rumble_show(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_RUMBLE);
+ spin_unlock_irqrestore(&wdata->state.lock, flags);
+
+ return sprintf(buf, "%d\n", state);
+}
+
+static ssize_t wiifs_rumble_set(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;
+
+ if (!atomic_read(&wdata->ready))
+ return -EBUSY;
+
+ spin_lock_irqsave(&wdata->state.lock, flags);
+ wiiproto_req_rumble(wdata, tmp);
+ spin_unlock_irqrestore(&wdata->state.lock, flags);
+
+ return count;
+}
+
+static DEVICE_ATTR(rumble, S_IRUGO | S_IWUSR, wiifs_rumble_show,
+ wiifs_rumble_set);
+
static int wiimote_input_event(struct input_dev *dev, unsigned int type,
unsigned int code, int value)
{
@@ -425,6 +462,9 @@ static int wiimote_hid_probe(struct hid_device *hdev,
ret = device_create_file(&hdev->dev, &dev_attr_led4);
if (ret)
goto err;
+ ret = device_create_file(&hdev->dev, &dev_attr_rumble);
+ if (ret)
+ goto err;
ret = hid_parse(hdev);
if (ret) {
@@ -464,6 +504,7 @@ err:
device_remove_file(&hdev->dev, &dev_attr_led2);
device_remove_file(&hdev->dev, &dev_attr_led3);
device_remove_file(&hdev->dev, &dev_attr_led4);
+ device_remove_file(&hdev->dev, &dev_attr_rumble);
wiimote_destroy(wdata);
return ret;
}
@@ -478,6 +519,7 @@ static void wiimote_hid_remove(struct hid_device *hdev)
device_remove_file(&hdev->dev, &dev_attr_led2);
device_remove_file(&hdev->dev, &dev_attr_led3);
device_remove_file(&hdev->dev, &dev_attr_led4);
+ device_remove_file(&hdev->dev, &dev_attr_rumble);
hid_hw_stop(hdev);
input_unregister_device(wdata->input);
--
1.7.6
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