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