/* $NetBSD: acpi_usb.c,v 1.2 2021/01/14 14:38:22 thorpej Exp $ */
/*-
* Copyright (c) 2018 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jared McNeill <
[email protected]>.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* USB Device-Specific Method (_DSM) support:
*
*
https://docs.microsoft.com/en-us/windows-hardware/drivers/bringup/usb-device-specific-method---dsm-
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: acpi_usb.c,v 1.2 2021/01/14 14:38:22 thorpej Exp $");
#include <sys/param.h>
#include <dev/acpi/acpireg.h>
#include <dev/acpi/acpivar.h>
#include <dev/acpi/acpi_usb.h>
/* Windows-defined USB subsystem device-specific method (_DSM) */
static UINT8 ehci_acpi_dsm_uuid[ACPI_UUID_LENGTH] = {
0x85, 0xe3, 0x2e, 0xce, 0xe6, 0x00, 0xcb, 0x48,
0x9f, 0x05, 0x2e, 0xdb, 0x92, 0x7c, 0x48, 0x99
};
void
acpi_usb_post_reset(ACPI_HANDLE handle)
{
/*
* Invoke the _DSM control method for post-reset processing function
* for dual-role USB controllers. If supported, this will perform any
* controller-specific initialization required to put the dual-role
* device into host mode.
*/
(void)acpi_dsm(handle, ehci_acpi_dsm_uuid, 0, 1, NULL, NULL);
}
