platform/x86: add MXM WMI driver. (99b38b4a) · Commits · 戴 / test

drivers/platform/x86/Kconfig

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		@@ -753,4 +753,11 @@ config SAMSUNG_LAPTOP
		To compile this driver as a module, choose M here: the module
		will be called samsung-laptop.

		config MXM_WMI
		tristate "WMI support for MXM Laptop Graphics"
		depends on WMI
		---help---
		MXM is a standard for laptop graphics cards, the WMI interface
		is required for switchable nvidia graphics machines

		endif # X86_PLATFORM_DEVICES

drivers/platform/x86/Makefile

+1 −0

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		@@ -42,3 +42,4 @@ obj-$(CONFIG_XO15_EBOOK) += xo15-ebook.o
		obj-$(CONFIG_IBM_RTL) += ibm_rtl.o
		obj-$(CONFIG_SAMSUNG_LAPTOP) += samsung-laptop.o
		obj-$(CONFIG_INTEL_MFLD_THERMAL) += intel_mid_thermal.o
		obj-$(CONFIG_MXM_WMI) += mxm-wmi.o

drivers/platform/x86/mxm-wmi.c

0 → 100644

+85 −0

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		/*
		* MXM WMI driver
		*
		* Copyright(C) 2010 Red Hat.
		*
		* 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
		*/
		#include <linux/kernel.h>
		#include <linux/module.h>
		#include <linux/init.h>
		#include <acpi/acpi_bus.h>
		#include <acpi/acpi_drivers.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" */

		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, 0x1, adapter, &input,
		&output);

		if (ACPI_FAILURE(status))
		return status;

		printk("mux switched %d\n", status);
		return 0;

		}
		EXPORT_SYMBOL_GPL(mxm_wmi_call_mxds);

		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);

include/linux/mxm-wmi.h

0 → 100644

+32 −0

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		/*
		* MXM WMI driver
		*
		* Copyright(C) 2010 Red Hat.
		*
		* 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
		*/

		#ifndef MXM_WMI_H
		#define MXM_WMI_H

		/* discrete adapters */
		#define MXM_MXDS_ADAPTER_0 0x0
		#define MXM_MXDS_ADAPTER_1 0x0
		/* integrated adapter */
		#define MXM_MXDS_ADAPTER_IGD 0x10
		int mxm_wmi_call_mxds(int adapter);
		bool mxm_wmi_supported(void);

		#endif

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