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authorOndrej Zary2010-02-03 23:54:59 -0800
committerDmitry Torokhov2010-02-04 00:21:52 -0800
commitf4a5e359c4bafc2269766ccd74256024160ed7ac (patch)
tree7d91348c8877c38f78be465faf34a72edfa26292 /drivers/input
parentfea4d14b69567e134e1838155a5dc857ebca70cb (diff)
Input: usbtouchscreen - find input endpoint automatically
Find input enpoint automatically instead of assuming that the first one is OK. This is needed for devices with multiple endpoints such as iNexio where the first endpoint might be output. Signed-off-by: Ondrej Zary <linux@rainbow-software.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'drivers/input')
-rw-r--r--drivers/input/touchscreen/usbtouchscreen.c17
1 files changed, 14 insertions, 3 deletions
diff --git a/drivers/input/touchscreen/usbtouchscreen.c b/drivers/input/touchscreen/usbtouchscreen.c
index 69be77118884..a2a82351a42f 100644
--- a/drivers/input/touchscreen/usbtouchscreen.c
+++ b/drivers/input/touchscreen/usbtouchscreen.c
@@ -1050,13 +1050,23 @@ static void usbtouch_free_buffers(struct usb_device *udev,
kfree(usbtouch->buffer);
}
+static struct usb_endpoint_descriptor *
+usbtouch_get_input_endpoint(struct usb_host_interface *interface)
+{
+ int i;
+
+ for (i = 0; i < interface->desc.bNumEndpoints; i++)
+ if (usb_endpoint_dir_in(&interface->endpoint[i].desc))
+ return &interface->endpoint[i].desc;
+
+ return NULL;
+}
static int usbtouch_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
struct usbtouch_usb *usbtouch;
struct input_dev *input_dev;
- struct usb_host_interface *interface;
struct usb_endpoint_descriptor *endpoint;
struct usb_device *udev = interface_to_usbdev(intf);
struct usbtouch_device_info *type;
@@ -1066,8 +1076,9 @@ static int usbtouch_probe(struct usb_interface *intf,
if (id->driver_info == DEVTYPE_IGNORE)
return -ENODEV;
- interface = intf->cur_altsetting;
- endpoint = &interface->endpoint[0].desc;
+ endpoint = usbtouch_get_input_endpoint(intf->cur_altsetting);
+ if (!endpoint)
+ return -ENXIO;
usbtouch = kzalloc(sizeof(struct usbtouch_usb), GFP_KERNEL);
input_dev = input_allocate_device();