wifi/1.6/IWifiChip.hal

/*
 * Copyright 2022 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package android.hardware.wifi@1.6;

import @1.0::IWifiIface;
import @1.0::WifiStatus;
import @1.5::WifiBand;
import @1.5::IWifiChip;
import @1.5::WifiIfaceMode;
import IWifiRttController;

/**
 * Interface that represents a chip that must be configured as a single unit.
 */
interface IWifiChip extends @1.5::IWifiChip {

    /**
     * Create a RTTController instance.
     *
     * RTT controller can be either:
     * a) Bound to a specific iface by passing in the corresponding |IWifiIface|
     * object in |iface| param, OR
     * b) Let the implementation decide the iface to use for RTT operations by
     * passing null in |iface| param.
     *
     * @param boundIface HIDL interface object representing the iface if
     *        the responder must be bound to a specific iface, null otherwise.
     * @return status WifiStatus of the operation.
     *         Possible status codes:
     *         |WifiStatusCode.SUCCESS|,
     *         |WifiStatusCode.ERROR_WIFI_CHIP_INVALID|
     */
    createRttController_1_6(IWifiIface boundIface)
        generates (WifiStatus status, IWifiRttController rtt);

    /**
     * Retrieve list of usable Wifi channels for the specified band &
     * operational modes.
     *
     * The list of usable Wifi channels in a given band depends on factors
     * like current country code, operational mode (e.g. STA, SAP, WFD-CLI,
     * WFD-GO, TDLS, NAN) and other restrictons due to DFS, cellular coexistence
     * and conncurency state of the device.
     *
     * @param band |WifiBand| for which list of usable channels is requested.
     * @param ifaceModeMask Bitmask of the modes represented by |WifiIfaceMode|
     *        Bitmask respresents all the modes that the caller is interested
     *        in (e.g. STA, SAP, CLI, GO, TDLS, NAN). E.g. If the caller is
     *        interested in knowing usable channels for P2P CLI, P2P GO & NAN,
     *        ifaceModeMask would be set to
     *        IFACE_MODE_P2P_CLIENT|IFACE_MODE_P2P_GO|IFACE_MODE_NAN.
     * @param filterMask Bitmask of filters represented by
     *        |UsableChannelFilter|. Specifies whether driver should filter
     *        channels based on additional criteria. If no filter is specified
     *        driver should return usable channels purely based on regulatory
     *        constraints.
     * @return status WifiStatus of the operation.
     *         Possible status codes:
     *         |WifiStatusCode.SUCCESS|,
     *         |WifiStatusCode.ERROR_NOT_SUPPORTED|,
     *         |WifiStatusCode.ERROR_INVALID_ARGS|,
     *         |WifiStatusCode.FAILURE_UNKNOWN|
     * @return channels List of channels represented by |WifiUsableChannel|
     *         Each entry represents a channel frequency, bandwidth and
     *         bitmask of modes (e.g. STA, SAP, CLI, GO, TDLS, NAN) that are
     *         allowed on that channel. E.g. If only STA mode can be supported
     *         on an indoor channel, only the IFACE_MODE_STA bit would be set
     *         for that channel. If 5GHz SAP cannot be supported, then none of
     *         the 5GHz channels will have IFACE_MODE_SOFTAP bit set.
     *         Note: Bits do not represent concurrency state. Each bit only
     *         represents whether particular mode is allowed on that channel.
     */
    getUsableChannels_1_6(WifiBand band, bitfield<WifiIfaceMode> ifaceModeMask,
            bitfield<UsableChannelFilter> filterMask)
        generates (WifiStatus status, vec<WifiUsableChannel> channels);
};