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98 lines
1.9 KiB
98 lines
1.9 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* MXM WMI driver |
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* |
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* Copyright(C) 2010 Red Hat. |
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*/ |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/mxm-wmi.h> |
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#include <linux/acpi.h> |
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MODULE_AUTHOR("Dave Airlie"); |
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MODULE_DESCRIPTION("MXM WMI Driver"); |
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MODULE_LICENSE("GPL"); |
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#define MXM_WMMX_GUID "F6CB5C3C-9CAE-4EBD-B577-931EA32A2CC0" |
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MODULE_ALIAS("wmi:"MXM_WMMX_GUID); |
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#define MXM_WMMX_FUNC_MXDS 0x5344584D /* "MXDS" */ |
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#define MXM_WMMX_FUNC_MXMX 0x53445344 /* "MXMX" */ |
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struct mxds_args { |
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u32 func; |
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u32 args; |
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u32 xarg; |
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}; |
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int mxm_wmi_call_mxds(int adapter) |
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{ |
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struct mxds_args args = { |
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.func = MXM_WMMX_FUNC_MXDS, |
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.args = 0, |
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.xarg = 1, |
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}; |
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struct acpi_buffer input = { (acpi_size)sizeof(args), &args }; |
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struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; |
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acpi_status status; |
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printk("calling mux switch %d\n", adapter); |
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status = wmi_evaluate_method(MXM_WMMX_GUID, 0x0, adapter, &input, |
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&output); |
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if (ACPI_FAILURE(status)) |
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return status; |
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printk("mux switched %d\n", status); |
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(mxm_wmi_call_mxds); |
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int mxm_wmi_call_mxmx(int adapter) |
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{ |
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struct mxds_args args = { |
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.func = MXM_WMMX_FUNC_MXMX, |
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.args = 0, |
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.xarg = 1, |
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}; |
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struct acpi_buffer input = { (acpi_size)sizeof(args), &args }; |
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struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL }; |
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acpi_status status; |
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printk("calling mux switch %d\n", adapter); |
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status = wmi_evaluate_method(MXM_WMMX_GUID, 0x0, adapter, &input, |
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&output); |
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if (ACPI_FAILURE(status)) |
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return status; |
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printk("mux mutex set switched %d\n", status); |
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return 0; |
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} |
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EXPORT_SYMBOL_GPL(mxm_wmi_call_mxmx); |
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bool mxm_wmi_supported(void) |
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{ |
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bool guid_valid; |
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guid_valid = wmi_has_guid(MXM_WMMX_GUID); |
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return guid_valid; |
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} |
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EXPORT_SYMBOL_GPL(mxm_wmi_supported); |
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static int __init mxm_wmi_init(void) |
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{ |
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return 0; |
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} |
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static void __exit mxm_wmi_exit(void) |
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{ |
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} |
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module_init(mxm_wmi_init); |
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module_exit(mxm_wmi_exit);
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