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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>
This commit is contained in:
Ondrej Zary 2010-02-03 23:54:59 -08:00 committed by Dmitry Torokhov
parent fea4d14b69
commit f4a5e359c4
1 changed files with 14 additions and 3 deletions
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17
drivers/input/touchscreen/usbtouchscreen.c
View File

@ -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();