1 /* 2 * MXM WMI driver 3 * 4 * Copyright(C) 2010 Red Hat. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 */ 20 #include <linux/kernel.h> 21 #include <linux/module.h> 22 #include <linux/init.h> 23 #include <linux/mxm-wmi.h> 24 #include <linux/acpi.h> 25 26 MODULE_AUTHOR("Dave Airlie"); 27 MODULE_DESCRIPTION("MXM WMI Driver"); 28 MODULE_LICENSE("GPL"); 29 30 #define MXM_WMMX_GUID "F6CB5C3C-9CAE-4EBD-B577-931EA32A2CC0" 31 32 MODULE_ALIAS("wmi:"MXM_WMMX_GUID); 33 34 #define MXM_WMMX_FUNC_MXDS 0x5344584D /* "MXDS" */ 35 #define MXM_WMMX_FUNC_MXMX 0x53445344 /* "MXMX" */ 36 37 struct mxds_args { 38 u32 func; 39 u32 args; 40 u32 xarg; 41 }; 42 43 int mxm_wmi_call_mxds(int adapter) 44 { 45 struct mxds_args args = { 46 .func = MXM_WMMX_FUNC_MXDS, 47 .args = 0, 48 .xarg = 1, 49 }; 50 struct acpi_buffer input = { (acpi_size)sizeof(args), &args }; 51 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; 52 acpi_status status; 53 54 printk("calling mux switch %d\n", adapter); 55 56 status = wmi_evaluate_method(MXM_WMMX_GUID, 0x0, adapter, &input, 57 &output); 58 59 if (ACPI_FAILURE(status)) 60 return status; 61 62 printk("mux switched %d\n", status); 63 return 0; 64 65 } 66 EXPORT_SYMBOL_GPL(mxm_wmi_call_mxds); 67 68 int mxm_wmi_call_mxmx(int adapter) 69 { 70 struct mxds_args args = { 71 .func = MXM_WMMX_FUNC_MXMX, 72 .args = 0, 73 .xarg = 1, 74 }; 75 struct acpi_buffer input = { (acpi_size)sizeof(args), &args }; 76 struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; 77 acpi_status status; 78 79 printk("calling mux switch %d\n", adapter); 80 81 status = wmi_evaluate_method(MXM_WMMX_GUID, 0x0, adapter, &input, 82 &output); 83 84 if (ACPI_FAILURE(status)) 85 return status; 86 87 printk("mux mutex set switched %d\n", status); 88 return 0; 89 90 } 91 EXPORT_SYMBOL_GPL(mxm_wmi_call_mxmx); 92 93 bool mxm_wmi_supported(void) 94 { 95 bool guid_valid; 96 guid_valid = wmi_has_guid(MXM_WMMX_GUID); 97 return guid_valid; 98 } 99 EXPORT_SYMBOL_GPL(mxm_wmi_supported); 100 101 static int __init mxm_wmi_init(void) 102 { 103 return 0; 104 } 105 106 static void __exit mxm_wmi_exit(void) 107 { 108 } 109 110 module_init(mxm_wmi_init); 111 module_exit(mxm_wmi_exit); 112