Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / platform / x86 / mxm-wmi.c

diff --git a/kernel/drivers/platform/x86/mxm-wmi.c b/kernel/drivers/platform/x86/mxm-wmi.c
new file mode 100644 (file)
index 0000000..f4bad83
--- /dev/null
+++ b/kernel/drivers/platform/x86/mxm-wmi.c
@@ -0,0 +1,111 @@
+/*
+ * 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 <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, 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);
+
+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, 0x1, 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);