1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Wifi Band Exclusion Interface (AMD ACPI Implementation)
4 * Copyright (C) 2023 Advanced Micro Devices
5 */
6
7#ifndef _ACPI_AMD_WBRF_H
8#define _ACPI_AMD_WBRF_H
9
10#include <linux/device.h>
11#include <linux/notifier.h>
12
13/* The maximum number of frequency band ranges */
14#define MAX_NUM_OF_WBRF_RANGES 11
15
16/* Record actions */
17#define WBRF_RECORD_ADD 0x0
18#define WBRF_RECORD_REMOVE 0x1
19
20/**
21 * struct freq_band_range - Wifi frequency band range definition
22 * @start: start frequency point (in Hz)
23 * @end: end frequency point (in Hz)
24 */
25struct freq_band_range {
26 u64 start;
27 u64 end;
28};
29
30/**
31 * struct wbrf_ranges_in_out - wbrf ranges info
32 * @num_of_ranges: total number of band ranges in this struct
33 * @band_list: array of Wifi band ranges
34 */
35struct wbrf_ranges_in_out {
36 u64 num_of_ranges;
37 struct freq_band_range band_list[MAX_NUM_OF_WBRF_RANGES];
38};
39
40/**
41 * enum wbrf_notifier_actions - wbrf notifier actions index
42 * @WBRF_CHANGED: there was some frequency band updates. The consumers
43 * should retrieve the latest active frequency bands.
44 */
45enum wbrf_notifier_actions {
46 WBRF_CHANGED,
47};
48
49#if IS_ENABLED(CONFIG_AMD_WBRF)
50bool acpi_amd_wbrf_supported_producer(struct device *dev);
51int acpi_amd_wbrf_add_remove(struct device *dev, uint8_t action, struct wbrf_ranges_in_out *in);
52bool acpi_amd_wbrf_supported_consumer(struct device *dev);
53int amd_wbrf_retrieve_freq_band(struct device *dev, struct wbrf_ranges_in_out *out);
54int amd_wbrf_register_notifier(struct notifier_block *nb);
55int amd_wbrf_unregister_notifier(struct notifier_block *nb);
56#else
57static inline
58bool acpi_amd_wbrf_supported_consumer(struct device *dev)
59{
60 return false;
61}
62
63static inline
64int acpi_amd_wbrf_add_remove(struct device *dev, uint8_t action, struct wbrf_ranges_in_out *in)
65{
66 return -ENODEV;
67}
68
69static inline
70bool acpi_amd_wbrf_supported_producer(struct device *dev)
71{
72 return false;
73}
74static inline
75int amd_wbrf_retrieve_freq_band(struct device *dev, struct wbrf_ranges_in_out *out)
76{
77 return -ENODEV;
78}
79static inline
80int amd_wbrf_register_notifier(struct notifier_block *nb)
81{
82 return -ENODEV;
83}
84static inline
85int amd_wbrf_unregister_notifier(struct notifier_block *nb)
86{
87 return -ENODEV;
88}
89#endif /* CONFIG_AMD_WBRF */
90
91#endif /* _ACPI_AMD_WBRF_H */
92