drivers/usb/wusbcore/pal.c

   1 /*
   2  * Wireless USB Host Controller
   3  * UWB Protocol Adaptation Layer (PAL) glue.
   4  *
   5  * Copyright (C) 2008 Cambridge Silicon Radio Ltd.
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License version
   9  * 2 as published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19 #include "wusbhc.h"
  20
  21 static void wusbhc_channel_changed(struct uwb_pal *pal, int channel)
  22 {
  23         struct wusbhc *wusbhc = container_of(pal, struct wusbhc, pal);
  24
  25         if (channel < 0)
  26                 wusbhc_stop(wusbhc);
  27         else
  28                 wusbhc_start(wusbhc);
  29 }
  30
  31 /**
  32  * wusbhc_pal_register - register the WUSB HC as a UWB PAL
  33  * @wusbhc: the WUSB HC
  34  */
  35 int wusbhc_pal_register(struct wusbhc *wusbhc)
  36 {
  37         uwb_pal_init(&wusbhc->pal);
  38
  39         wusbhc->pal.name   = "wusbhc";
  40         wusbhc->pal.device = wusbhc->usb_hcd.self.controller;
  41         wusbhc->pal.rc     = wusbhc->uwb_rc;
  42         wusbhc->pal.channel_changed = wusbhc_channel_changed;
  43
  44         return uwb_pal_register(&wusbhc->pal);
  45 }
  46
  47 /**
  48  * wusbhc_pal_unregister - unregister the WUSB HC as a UWB PAL
  49  * @wusbhc: the WUSB HC
  50  */
  51 void wusbhc_pal_unregister(struct wusbhc *wusbhc)
  52 {
  53         if (wusbhc->uwb_rc)
  54                 uwb_pal_unregister(&wusbhc->pal);
  55 }