linux-arkmicro/linux/drivers/usb/wusbcore/pal.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Wireless USB Host Controller
 * UWB Protocol Adaptation Layer (PAL) glue.
 *
 * Copyright (C) 2008 Cambridge Silicon Radio Ltd.
 */
#include "wusbhc.h"

static void wusbhc_channel_changed(struct uwb_pal *pal, int channel)
{
	struct wusbhc *wusbhc = container_of(pal, struct wusbhc, pal);

	dev_dbg(wusbhc->dev, "%s: channel = %d\n", __func__, channel);
	if (channel < 0)
		wusbhc_stop(wusbhc);
	else
		wusbhc_start(wusbhc);
}

/**
 * wusbhc_pal_register - register the WUSB HC as a UWB PAL
 * @wusbhc: the WUSB HC
 */
int wusbhc_pal_register(struct wusbhc *wusbhc)
{
	uwb_pal_init(&wusbhc->pal);

	wusbhc->pal.name   = "wusbhc";
	wusbhc->pal.device = wusbhc->usb_hcd.self.controller;
	wusbhc->pal.rc     = wusbhc->uwb_rc;
	wusbhc->pal.channel_changed = wusbhc_channel_changed;

	return uwb_pal_register(&wusbhc->pal);
}

/**
 * wusbhc_pal_unregister - unregister the WUSB HC as a UWB PAL
 * @wusbhc: the WUSB HC
 */
void wusbhc_pal_unregister(struct wusbhc *wusbhc)
{
	if (wusbhc->uwb_rc)
		uwb_pal_unregister(&wusbhc->pal);
}