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authorDavid Herrmann <dh.herrmann@googlemail.com>2012-06-10 15:16:19 +0200
committerJiri Kosina <jkosina@suse.cz>2012-06-18 13:42:01 +0200
commit5e87a36ae375297b71cc21ac7e32846832bcfb34 (patch)
tree4f5d355092d58e4690f99ced40bc4efceab0ab40 /drivers
parentd365c6cfd337a2bccdc65eacce271a311ea1072c (diff)
HID: uhid: allow feeding input data into uhid devices
This adds a new event type UHID_INPUT which allows user-space to feed raw HID reports into the HID subsystem. We copy the data into kernel memory and directly feed it into the HID core. There is no error handling of the events couldn't be parsed so user-space should consider all events successfull unless read() returns an error. Signed-off-by: David Herrmann <dh.herrmann@googlemail.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/hid/uhid.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/hid/uhid.c b/drivers/hid/uhid.c
index 61ee7cc32ccf..3d1ebda122e5 100644
--- a/drivers/hid/uhid.c
+++ b/drivers/hid/uhid.c
@@ -210,6 +210,17 @@ static int uhid_dev_destroy(struct uhid_device *uhid)
return 0;
}
+static int uhid_dev_input(struct uhid_device *uhid, struct uhid_event *ev)
+{
+ if (!uhid->running)
+ return -EINVAL;
+
+ hid_input_report(uhid->hid, HID_INPUT_REPORT, ev->u.input.data,
+ min_t(size_t, ev->u.input.size, UHID_DATA_MAX), 0);
+
+ return 0;
+}
+
static int uhid_char_open(struct inode *inode, struct file *file)
{
struct uhid_device *uhid;
@@ -321,6 +332,9 @@ static ssize_t uhid_char_write(struct file *file, const char __user *buffer,
case UHID_DESTROY:
ret = uhid_dev_destroy(uhid);
break;
+ case UHID_INPUT:
+ ret = uhid_dev_input(uhid, &uhid->input_buf);
+ break;
default:
ret = -EOPNOTSUPP;
}

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