[linux-block.git] / drivers / platform / x86 / mxm-wmi.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 };
	acpi_status status;

	printk("calling mux switch %d\n", adapter);

	status = wmi_evaluate_method(MXM_WMMX_GUID, 0x0, adapter, &input, NULL);

	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 };
	acpi_status status;

	printk("calling mux switch %d\n", adapter);

	status = wmi_evaluate_method(MXM_WMMX_GUID, 0x0, adapter, &input, NULL);

	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);
Commit	Line	Data
1a59d1b8	1	// SPDX-License-Identifier: GPL-2.0-or-later
99b38b4a DA	2	/*
	3	* MXM WMI driver
	4	*
	5	* Copyright(C) 2010 Red Hat.
99b38b4a DA	6	*/
	7	#include <linux/kernel.h>
	8	#include <linux/module.h>
	9	#include <linux/init.h>
475879d6	10	#include <linux/mxm-wmi.h>
8b48463f	11	#include <linux/acpi.h>
99b38b4a DA	12
	13	MODULE_AUTHOR("Dave Airlie");
	14	MODULE_DESCRIPTION("MXM WMI Driver");
	15	MODULE_LICENSE("GPL");
	16
	17	#define MXM_WMMX_GUID "F6CB5C3C-9CAE-4EBD-B577-931EA32A2CC0"
	18
	19	MODULE_ALIAS("wmi:"MXM_WMMX_GUID);
	20
	21	#define MXM_WMMX_FUNC_MXDS 0x5344584D /* "MXDS" */
000703f4	22	#define MXM_WMMX_FUNC_MXMX 0x53445344 /* "MXMX" */
99b38b4a DA	23
	24	struct mxds_args {
	25	u32 func;
	26	u32 args;
	27	u32 xarg;
	28	};
	29
	30	int mxm_wmi_call_mxds(int adapter)
	31	{
	32	struct mxds_args args = {
	33	.func = MXM_WMMX_FUNC_MXDS,
	34	.args = 0,
	35	.xarg = 1,
	36	};
	37	struct acpi_buffer input = { (acpi_size)sizeof(args), &args };
99b38b4a DA	38	acpi_status status;
	39
	40	printk("calling mux switch %d\n", adapter);
000703f4	41
727cc014	42	status = wmi_evaluate_method(MXM_WMMX_GUID, 0x0, adapter, &input, NULL);
99b38b4a DA	43
	44	if (ACPI_FAILURE(status))
	45	return status;
	46
	47	printk("mux switched %d\n", status);
	48	return 0;
	49
	50	}
	51	EXPORT_SYMBOL_GPL(mxm_wmi_call_mxds);
	52
000703f4 DA	53	int mxm_wmi_call_mxmx(int adapter)
	54	{
	55	struct mxds_args args = {
	56	.func = MXM_WMMX_FUNC_MXMX,
	57	.args = 0,
	58	.xarg = 1,
	59	};
	60	struct acpi_buffer input = { (acpi_size)sizeof(args), &args };
000703f4 DA	61	acpi_status status;
	62
	63	printk("calling mux switch %d\n", adapter);
	64
727cc014	65	status = wmi_evaluate_method(MXM_WMMX_GUID, 0x0, adapter, &input, NULL);
000703f4 DA	66
	67	if (ACPI_FAILURE(status))
	68	return status;
	69
	70	printk("mux mutex set switched %d\n", status);
	71	return 0;
	72
	73	}
	74	EXPORT_SYMBOL_GPL(mxm_wmi_call_mxmx);
	75
99b38b4a DA	76	bool mxm_wmi_supported(void)
	77	{
	78	bool guid_valid;
	79	guid_valid = wmi_has_guid(MXM_WMMX_GUID);
	80	return guid_valid;
	81	}
	82	EXPORT_SYMBOL_GPL(mxm_wmi_supported);
	83
	84	static int __init mxm_wmi_init(void)
	85	{
	86	return 0;
	87	}
	88
	89	static void __exit mxm_wmi_exit(void)
	90	{
	91	}
	92
	93	module_init(mxm_wmi_init);
	94	module_exit(mxm_wmi_exit);