projects / linux-block.git / blame
| 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 }; | |
| 38 | struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; | |
| 39 | acpi_status status; | |
| 40 | ||
| 41 | printk("calling mux switch %d\n", adapter); | |
| 000703f4 | 42 | |
| f85a43b9 | 43 | status = wmi_evaluate_method(MXM_WMMX_GUID, 0x0, adapter, &input, |
| 99b38b4a DA |
44 | &output); |
| 45 | ||
| 46 | if (ACPI_FAILURE(status)) | |
| 47 | return status; | |
| 48 | ||
| 49 | printk("mux switched %d\n", status); | |
| 50 | return 0; | |
| 51 | ||
| 52 | } | |
| 53 | EXPORT_SYMBOL_GPL(mxm_wmi_call_mxds); | |
| 54 | ||
| 000703f4 DA |
55 | int mxm_wmi_call_mxmx(int adapter) |
| 56 | { | |
| 57 | struct mxds_args args = { | |
| 58 | .func = MXM_WMMX_FUNC_MXMX, | |
| 59 | .args = 0, | |
| 60 | .xarg = 1, | |
| 61 | }; | |
| 62 | struct acpi_buffer input = { (acpi_size)sizeof(args), &args }; | |
| 63 | struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; | |
| 64 | acpi_status status; | |
| 65 | ||
| 66 | printk("calling mux switch %d\n", adapter); | |
| 67 | ||
| f85a43b9 | 68 | status = wmi_evaluate_method(MXM_WMMX_GUID, 0x0, adapter, &input, |
| 000703f4 DA |
69 | &output); |
| 70 | ||
| 71 | if (ACPI_FAILURE(status)) | |
| 72 | return status; | |
| 73 | ||
| 74 | printk("mux mutex set switched %d\n", status); | |
| 75 | return 0; | |
| 76 | ||
| 77 | } | |
| 78 | EXPORT_SYMBOL_GPL(mxm_wmi_call_mxmx); | |
| 79 | ||
| 99b38b4a DA |
80 | bool mxm_wmi_supported(void) |
| 81 | { | |
| 82 | bool guid_valid; | |
| 83 | guid_valid = wmi_has_guid(MXM_WMMX_GUID); | |
| 84 | return guid_valid; | |
| 85 | } | |
| 86 | EXPORT_SYMBOL_GPL(mxm_wmi_supported); | |
| 87 | ||
| 88 | static int __init mxm_wmi_init(void) | |
| 89 | { | |
| 90 | return 0; | |
| 91 | } | |
| 92 | ||
| 93 | static void __exit mxm_wmi_exit(void) | |
| 94 | { | |
| 95 | } | |
| 96 | ||
| 97 | module_init(mxm_wmi_init); | |
| 98 | module_exit(mxm_wmi_exit); |