linux/drivers/platform/x86/mxm-wmi.c
Thomas Gleixner 1a59d1b8e0 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license as published by
  the free software foundation either version 2 of the license or at
  your option any later version this program is distributed in the
  hope that it will be useful but without any warranty without even
  the implied warranty of merchantability or fitness for a particular
  purpose see the gnu general public license for more details you
  should have received a copy of the gnu general public license along
  with this program if not write to the free software foundation inc
  59 temple place suite 330 boston ma 02111 1307 usa

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-or-later

has been chosen to replace the boilerplate/reference in 1334 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-30 11:26:35 -07:00

99 lines
1.9 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* MXM WMI driver
*
* Copyright(C) 2010 Red Hat.
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/mxm-wmi.h>
#include <linux/acpi.h>
MODULE_AUTHOR("Dave Airlie");
MODULE_DESCRIPTION("MXM WMI Driver");
MODULE_LICENSE("GPL");
#define MXM_WMMX_GUID "F6CB5C3C-9CAE-4EBD-B577-931EA32A2CC0"
MODULE_ALIAS("wmi:"MXM_WMMX_GUID);
#define MXM_WMMX_FUNC_MXDS 0x5344584D /* "MXDS" */
#define MXM_WMMX_FUNC_MXMX 0x53445344 /* "MXMX" */
struct mxds_args {
u32 func;
u32 args;
u32 xarg;
};
int mxm_wmi_call_mxds(int adapter)
{
struct mxds_args args = {
.func = MXM_WMMX_FUNC_MXDS,
.args = 0,
.xarg = 1,
};
struct acpi_buffer input = { (acpi_size)sizeof(args), &args };
struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
acpi_status status;
printk("calling mux switch %d\n", adapter);
status = wmi_evaluate_method(MXM_WMMX_GUID, 0x0, adapter, &input,
&output);
if (ACPI_FAILURE(status))
return status;
printk("mux switched %d\n", status);
return 0;
}
EXPORT_SYMBOL_GPL(mxm_wmi_call_mxds);
int mxm_wmi_call_mxmx(int adapter)
{
struct mxds_args args = {
.func = MXM_WMMX_FUNC_MXMX,
.args = 0,
.xarg = 1,
};
struct acpi_buffer input = { (acpi_size)sizeof(args), &args };
struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
acpi_status status;
printk("calling mux switch %d\n", adapter);
status = wmi_evaluate_method(MXM_WMMX_GUID, 0x0, adapter, &input,
&output);
if (ACPI_FAILURE(status))
return status;
printk("mux mutex set switched %d\n", status);
return 0;
}
EXPORT_SYMBOL_GPL(mxm_wmi_call_mxmx);
bool mxm_wmi_supported(void)
{
bool guid_valid;
guid_valid = wmi_has_guid(MXM_WMMX_GUID);
return guid_valid;
}
EXPORT_SYMBOL_GPL(mxm_wmi_supported);
static int __init mxm_wmi_init(void)
{
return 0;
}
static void __exit mxm_wmi_exit(void)
{
}
module_init(mxm_wmi_init);
module_exit(mxm_wmi_exit);