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 */
25 struct 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 */
35 struct 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 */
45 enum wbrf_notifier_actions {
46 WBRF_CHANGED,
47 };
48
49 #if IS_ENABLED(CONFIG_AMD_WBRF)
50 bool acpi_amd_wbrf_supported_producer(struct device *dev);
51 int acpi_amd_wbrf_add_remove(struct device *dev, uint8_t action, struct wbrf_ranges_in_out *in);
52 bool acpi_amd_wbrf_supported_consumer(struct device *dev);
53 int amd_wbrf_retrieve_freq_band(struct device *dev, struct wbrf_ranges_in_out *out);
54 int amd_wbrf_register_notifier(struct notifier_block *nb);
55 int amd_wbrf_unregister_notifier(struct notifier_block *nb);
56 #else
57 static inline
acpi_amd_wbrf_supported_consumer(struct device * dev)58 bool acpi_amd_wbrf_supported_consumer(struct device *dev)
59 {
60 return false;
61 }
62
63 static inline
acpi_amd_wbrf_add_remove(struct device * dev,uint8_t action,struct wbrf_ranges_in_out * in)64 int acpi_amd_wbrf_add_remove(struct device *dev, uint8_t action, struct wbrf_ranges_in_out *in)
65 {
66 return -ENODEV;
67 }
68
69 static inline
acpi_amd_wbrf_supported_producer(struct device * dev)70 bool acpi_amd_wbrf_supported_producer(struct device *dev)
71 {
72 return false;
73 }
74 static inline
amd_wbrf_retrieve_freq_band(struct device * dev,struct wbrf_ranges_in_out * out)75 int amd_wbrf_retrieve_freq_band(struct device *dev, struct wbrf_ranges_in_out *out)
76 {
77 return -ENODEV;
78 }
79 static inline
amd_wbrf_register_notifier(struct notifier_block * nb)80 int amd_wbrf_register_notifier(struct notifier_block *nb)
81 {
82 return -ENODEV;
83 }
84 static inline
amd_wbrf_unregister_notifier(struct notifier_block * nb)85 int 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