hw/usb/quirks.c

   1 /*
   2  * USB quirk handling
   3  *
   4  * Copyright (c) 2012 Red Hat, Inc.
   5  *
   6  * Red Hat Authors:
   7  * Hans de Goede <hdegoede@redhat.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  */
  14
  15 #include "qemu/osdep.h"
  16 #include "quirks.h"
  17 #include "hw/usb.h"
  18
  19 static bool usb_id_match(const struct usb_device_id *ids,
  20                          uint16_t vendor_id, uint16_t product_id,
  21                          uint8_t interface_class, uint8_t interface_subclass,
  22                          uint8_t interface_protocol) {
  23     int i;
  24
  25     for (i = 0; ids[i].vendor_id != -1; i++) {
  26         if (ids[i].vendor_id  == vendor_id &&
  27             ids[i].product_id == product_id &&
  28             (ids[i].interface_class == -1 ||
  29              (ids[i].interface_class == interface_class &&
  30               ids[i].interface_subclass == interface_subclass &&
  31               ids[i].interface_protocol == interface_protocol))) {
  32             return true;
  33         }
  34     }
  35     return false;
  36 }
  37
  38 int usb_get_quirks(uint16_t vendor_id, uint16_t product_id,
  39                    uint8_t interface_class, uint8_t interface_subclass,
  40                    uint8_t interface_protocol)
  41 {
  42     int quirks = 0;
  43
  44     if (usb_id_match(usbredir_raw_serial_ids, vendor_id, product_id,
  45                    interface_class, interface_subclass, interface_protocol)) {
  46         quirks |= USB_QUIRK_BUFFER_BULK_IN;
  47     }
  48     if (usb_id_match(usbredir_ftdi_serial_ids, vendor_id, product_id,
  49                    interface_class, interface_subclass, interface_protocol)) {
  50         quirks |= USB_QUIRK_BUFFER_BULK_IN | USB_QUIRK_IS_FTDI;
  51     }
  52
  53     return quirks;
  54 }