| Kyle Swenson | 8d8f654 | 2021-03-15 11:02:55 -0600 | [diff] [blame^] | 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, 0x1, 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, 0x1, 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); |