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| 1 | +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| 2 | +# Copyright (c) 2024 Qualcomm Innovation Center, Inc. All rights reserved. |
| 3 | +%YAML 1.2 |
| 4 | +--- |
| 5 | +$id: http://devicetree.org/schemas/net/wireless/qcom,ath12k-wsi.yaml# |
| 6 | +$schema: http://devicetree.org/meta-schemas/core.yaml# |
| 7 | + |
| 8 | +title: Qualcomm Technologies ath12k wireless devices (PCIe) with WSI interface |
| 9 | + |
| 10 | +maintainers: |
| 11 | + - Jeff Johnson <[email protected]> |
| 12 | + |
| 13 | + |
| 14 | +description: | |
| 15 | + Qualcomm Technologies IEEE 802.11be PCIe devices with WSI interface. |
| 16 | +
|
| 17 | + The ath12k devices (QCN9274) feature WSI support. WSI stands for |
| 18 | + WLAN Serial Interface. It is used for the exchange of specific |
| 19 | + control information across radios based on the doorbell mechanism. |
| 20 | + This WSI connection is essential to exchange control information |
| 21 | + among these devices. |
| 22 | +
|
| 23 | + The WSI interface includes TX and RX ports, which are used to connect |
| 24 | + multiple WSI-supported devices together, forming a WSI group. |
| 25 | +
|
| 26 | + Diagram to represent one WSI connection (one WSI group) among |
| 27 | + three devices. |
| 28 | +
|
| 29 | + +-------+ +-------+ +-------+ |
| 30 | + | pcie1 | | pcie2 | | pcie3 | |
| 31 | + | | | | | | |
| 32 | + +----->| wsi |------->| wsi |------->| wsi |-----+ |
| 33 | + | | grp 0 | | grp 0 | | grp 0 | | |
| 34 | + | +-------+ +-------+ +-------+ | |
| 35 | + +------------------------------------------------------+ |
| 36 | +
|
| 37 | + Diagram to represent two WSI connections (two separate WSI groups) |
| 38 | + among four devices. |
| 39 | +
|
| 40 | + +-------+ +-------+ +-------+ +-------+ |
| 41 | + | pcie0 | | pcie1 | | pcie2 | | pcie3 | |
| 42 | + | | | | | | | | |
| 43 | + +-->| wsi |--->| wsi |--+ +-->| wsi |--->| wsi |--+ |
| 44 | + | | grp 0 | | grp 0 | | | | grp 1 | | grp 1 | | |
| 45 | + | +-------+ +-------+ | | +-------+ +-------+ | |
| 46 | + +---------------------------+ +---------------------------+ |
| 47 | +
|
| 48 | +properties: |
| 49 | + compatible: |
| 50 | + enum: |
| 51 | + - pci17cb,1109 # QCN9274 |
| 52 | + |
| 53 | + reg: |
| 54 | + maxItems: 1 |
| 55 | + |
| 56 | + qcom,ath12k-calibration-variant: |
| 57 | + $ref: /schemas/types.yaml#/definitions/string |
| 58 | + description: |
| 59 | + String to uniquely identify variant of the calibration data for designs |
| 60 | + with colliding bus and device ids |
| 61 | + |
| 62 | + qcom,wsi-controller: |
| 63 | + $ref: /schemas/types.yaml#/definitions/flag |
| 64 | + description: |
| 65 | + The WSI controller device in the WSI group aids (is capable) to |
| 66 | + synchronize the Timing Synchronization Function (TSF) clock across |
| 67 | + all devices in the WSI group. |
| 68 | + |
| 69 | + ports: |
| 70 | + $ref: /schemas/graph.yaml#/properties/ports |
| 71 | + properties: |
| 72 | + port@0: |
| 73 | + $ref: /schemas/graph.yaml#/properties/port |
| 74 | + description: |
| 75 | + This is the TX port of WSI interface. It is attached to the RX |
| 76 | + port of the next device in the WSI connection. |
| 77 | + |
| 78 | + port@1: |
| 79 | + $ref: /schemas/graph.yaml#/properties/port |
| 80 | + description: |
| 81 | + This is the RX port of WSI interface. It is attached to the TX |
| 82 | + port of the previous device in the WSI connection. |
| 83 | + |
| 84 | +required: |
| 85 | + - compatible |
| 86 | + - reg |
| 87 | + |
| 88 | +additionalProperties: false |
| 89 | + |
| 90 | +examples: |
| 91 | + - | |
| 92 | + pcie { |
| 93 | + #address-cells = <3>; |
| 94 | + #size-cells = <2>; |
| 95 | +
|
| 96 | + pcie@0 { |
| 97 | + device_type = "pci"; |
| 98 | + reg = <0x0 0x0 0x0 0x0 0x0>; |
| 99 | + #address-cells = <3>; |
| 100 | + #size-cells = <2>; |
| 101 | + ranges; |
| 102 | +
|
| 103 | + wifi@0 { |
| 104 | + compatible = "pci17cb,1109"; |
| 105 | + reg = <0x0 0x0 0x0 0x0 0x0>; |
| 106 | +
|
| 107 | + qcom,ath12k-calibration-variant = "RDP433_1"; |
| 108 | +
|
| 109 | + ports { |
| 110 | + #address-cells = <1>; |
| 111 | + #size-cells = <0>; |
| 112 | +
|
| 113 | + port@0 { |
| 114 | + reg = <0>; |
| 115 | +
|
| 116 | + wifi1_wsi_tx: endpoint { |
| 117 | + remote-endpoint = <&wifi2_wsi_rx>; |
| 118 | + }; |
| 119 | + }; |
| 120 | +
|
| 121 | + port@1 { |
| 122 | + reg = <1>; |
| 123 | +
|
| 124 | + wifi1_wsi_rx: endpoint { |
| 125 | + remote-endpoint = <&wifi3_wsi_tx>; |
| 126 | + }; |
| 127 | + }; |
| 128 | + }; |
| 129 | + }; |
| 130 | + }; |
| 131 | +
|
| 132 | + pcie@1 { |
| 133 | + device_type = "pci"; |
| 134 | + reg = <0x0 0x0 0x1 0x0 0x0>; |
| 135 | + #address-cells = <3>; |
| 136 | + #size-cells = <2>; |
| 137 | + ranges; |
| 138 | +
|
| 139 | + wifi@0 { |
| 140 | + compatible = "pci17cb,1109"; |
| 141 | + reg = <0x0 0x0 0x0 0x0 0x0>; |
| 142 | +
|
| 143 | + qcom,ath12k-calibration-variant = "RDP433_2"; |
| 144 | + qcom,wsi-controller; |
| 145 | +
|
| 146 | + ports { |
| 147 | + #address-cells = <1>; |
| 148 | + #size-cells = <0>; |
| 149 | +
|
| 150 | + port@0 { |
| 151 | + reg = <0>; |
| 152 | +
|
| 153 | + wifi2_wsi_tx: endpoint { |
| 154 | + remote-endpoint = <&wifi3_wsi_rx>; |
| 155 | + }; |
| 156 | + }; |
| 157 | +
|
| 158 | + port@1 { |
| 159 | + reg = <1>; |
| 160 | +
|
| 161 | + wifi2_wsi_rx: endpoint { |
| 162 | + remote-endpoint = <&wifi1_wsi_tx>; |
| 163 | + }; |
| 164 | + }; |
| 165 | + }; |
| 166 | + }; |
| 167 | + }; |
| 168 | +
|
| 169 | + pcie@2 { |
| 170 | + device_type = "pci"; |
| 171 | + reg = <0x0 0x0 0x2 0x0 0x0>; |
| 172 | + #address-cells = <3>; |
| 173 | + #size-cells = <2>; |
| 174 | + ranges; |
| 175 | +
|
| 176 | + wifi@0 { |
| 177 | + compatible = "pci17cb,1109"; |
| 178 | + reg = <0x0 0x0 0x0 0x0 0x0>; |
| 179 | +
|
| 180 | + qcom,ath12k-calibration-variant = "RDP433_3"; |
| 181 | +
|
| 182 | + ports { |
| 183 | + #address-cells = <1>; |
| 184 | + #size-cells = <0>; |
| 185 | +
|
| 186 | + port@0 { |
| 187 | + reg = <0>; |
| 188 | +
|
| 189 | + wifi3_wsi_tx: endpoint { |
| 190 | + remote-endpoint = <&wifi1_wsi_rx>; |
| 191 | + }; |
| 192 | + }; |
| 193 | +
|
| 194 | + port@1 { |
| 195 | + reg = <1>; |
| 196 | +
|
| 197 | + wifi3_wsi_rx: endpoint { |
| 198 | + remote-endpoint = <&wifi2_wsi_tx>; |
| 199 | + }; |
| 200 | + }; |
| 201 | + }; |
| 202 | + }; |
| 203 | + }; |
| 204 | + }; |
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