nexus/TiwlanWifiController.cpp

/*
 * Copyright (C) 2008 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.
 */

#include <stdlib.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>

#include <cutils/properties.h>
#define LOG_TAG "TiwlanWifiController"
#include <cutils/log.h>

#include "PropertyManager.h"
#include "TiwlanWifiController.h"
#include "TiwlanEventListener.h"

#define DRIVER_PROP_NAME "wlan.driver.status"

extern "C" int sched_yield(void);

TiwlanWifiController::TiwlanWifiController(PropertyManager *propmngr,
                                           IControllerHandler *handlers,
                                           char *modpath, char *modname,
                                           char *modargs) :
                      WifiController(propmngr, handlers, modpath, modname,
                                     modargs) {
    mEventListener = NULL;
    mListenerSock = -1;
}

int TiwlanWifiController::powerUp() {
    return 0; // Powerup is currently done when the driver is loaded
}

int TiwlanWifiController::powerDown() {
    if (mEventListener) {
        delete mEventListener;
        shutdown(mListenerSock, SHUT_RDWR);
        close(mListenerSock);
        mListenerSock = -1;
        mEventListener = NULL;
    }
   
    return 0; // Powerdown is currently done when the driver is unloaded
}

bool TiwlanWifiController::isPoweredUp() {
    return isKernelModuleLoaded(getModuleName());
}

int TiwlanWifiController::loadFirmware() {
    char driver_status[PROPERTY_VALUE_MAX];
    int count = 100;

    property_set("ctl.start", "wlan_loader");
    sched_yield();

    // Wait for driver to be ready
    while (count-- > 0) {
        if (property_get(DRIVER_PROP_NAME, driver_status, NULL)) {
            if (!strcmp(driver_status, "ok")) {
                ALOGD("Firmware loaded OK");

                if (startDriverEventListener()) {
                    ALOGW("Failed to start driver event listener (%s)",
                         strerror(errno));
                }

                return 0;
            } else if (!strcmp(DRIVER_PROP_NAME, "failed")) {
                ALOGE("Firmware load failed");
                return -1;
            }
        }
        usleep(200000);
    }
    property_set(DRIVER_PROP_NAME, "timeout");
    ALOGE("Firmware load timed out");
    return -1;
}

int TiwlanWifiController::startDriverEventListener() {
    struct sockaddr_in addr;

    if (mListenerSock != -1) {
        ALOGE("Listener already started!");
        errno = EBUSY;
        return -1;
    }

    if ((mListenerSock = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
        ALOGE("socket failed (%s)", strerror(errno));
        return -1;
    }

    memset(&addr, 0, sizeof(addr));
    addr.sin_family = AF_INET;
    addr.sin_addr.s_addr = htonl(INADDR_ANY);
    addr.sin_port = htons(TI_DRIVER_MSG_PORT);

    if (bind(mListenerSock,
             (struct sockaddr *) &addr,
             sizeof(addr)) < 0) {
        ALOGE("bind failed (%s)", strerror(errno));
        goto out_err;
    }

    mEventListener = new TiwlanEventListener(mListenerSock);

    if (mEventListener->startListener()) {
        ALOGE("Error starting driver listener (%s)", strerror(errno));
        goto out_err;
    }
    return 0;
out_err:
    if (mEventListener) {
        delete mEventListener;
        mEventListener = NULL;
    }
    if (mListenerSock != -1) {
        shutdown(mListenerSock, SHUT_RDWR);
        close(mListenerSock);
        mListenerSock = -1;
    }
    return -1;
}

bool TiwlanWifiController::isFirmwareLoaded() {
    // Always load the firmware
    return false;
}