src/connectivity/wlan/drivers/wlanphy/driver.cpp

// Copyright 2018 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "driver.h"

#include <ddk/binding.h>
#include <ddk/debug.h>
#include <ddk/driver.h>
#include <lib/async-loop/cpp/loop.h>
#include <zircon/status.h>

#include "device.h"

// Not guarded by a mutex, because it will be valid between .init and .release and nothing else will
// exist outside those two calls.
static async::Loop* loop = nullptr;

zx_status_t wlanphy_init(void** out_ctx) {
    loop = new async::Loop(&kAsyncLoopConfigNoAttachToThread);
    zx_status_t status = loop->StartThread("wlanphy-loop");
    if (status != ZX_OK) {
        zxlogf(ERROR, "wlanphy: could not create event loop: %s\n", zx_status_get_string(status));
        delete loop;
        loop = nullptr;
    } else {
        zxlogf(INFO, "wlanphy: event loop started\n");
    }
    return status;
}

zx_status_t wlanphy_bind(void* ctx, zx_device_t* device) {
    zxlogf(INFO, "%s\n", __func__);

    wlanphy_impl_protocol_t wlanphy_impl_proto;
    zx_status_t status;
    status = device_get_protocol(device, ZX_PROTOCOL_WLANPHY_IMPL,
                                 static_cast<void*>(&wlanphy_impl_proto));
    if (status != ZX_OK) {
        zxlogf(ERROR, "wlanphy: bind: no wlanphy_impl protocol (%s)\n",
               zx_status_get_string(status));
        return ZX_ERR_INTERNAL;
    }

    auto wlanphy_dev = std::make_unique<wlanphy::Device>(device, wlanphy_impl_proto);
    status = wlanphy_dev->Bind();
    if (status != ZX_OK) {
        zxlogf(ERROR, "wlanphy: could not bind: %s\n", zx_status_get_string(status));
    } else {
        // devhost is now responsible for the memory used by wlandev. It will be
        // cleaned up in the Device::Release() method.
        wlanphy_dev.release();
    }
    return status;
}

async_dispatcher_t* wlanphy_async_t() {
    return loop->dispatcher();
}

static zx_driver_ops_t wlanphy_driver_ops = []() {
    zx_driver_ops_t ops;
    ops.version = DRIVER_OPS_VERSION;
    ops.init = wlanphy_init;
    ops.bind = wlanphy_bind;
    return ops;
}();

// clang-format: off
ZIRCON_DRIVER_BEGIN(wlan, wlanphy_driver_ops, "zircon", "0.1", 1)
    BI_MATCH_IF(EQ, BIND_PROTOCOL, ZX_PROTOCOL_WLANPHY_IMPL),
ZIRCON_DRIVER_END(wlan)