rt2x00dev.c

	/*
	 * Allow the HW to uninitialize.
	 */
	rt2x00dev->ops->lib->uninitialize(rt2x00dev);

	/*
	 * Free allocated queue entries.
	 */
	rt2x00queue_uninitialize(rt2x00dev);
}

static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)
{
	int status;

	if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
		return 0;

	/*
	 * Allocate all queue entries.
	 */
	status = rt2x00queue_initialize(rt2x00dev);
	if (status)
		return status;

	/*
	 * Initialize the device.
	 */
	status = rt2x00dev->ops->lib->initialize(rt2x00dev);
	if (status) {
		rt2x00queue_uninitialize(rt2x00dev);
		return status;
	}

	__set_bit(DEVICE_INITIALIZED, &rt2x00dev->flags);

	/*
	 * Register the extra components.
	 */
	rt2x00rfkill_register(rt2x00dev);

	return 0;
}

int rt2x00lib_start(struct rt2x00_dev *rt2x00dev)
{
	int retval;

	if (test_bit(DEVICE_STARTED, &rt2x00dev->flags))
		return 0;

	/*
	 * If this is the first interface which is added,
	 * we should load the firmware now.
	 */
	retval = rt2x00lib_load_firmware(rt2x00dev);
	if (retval)
		return retval;

	/*
	 * Initialize the device.
	 */
	retval = rt2x00lib_initialize(rt2x00dev);
	if (retval)
		return retval;

	/*
	 * Enable radio.
	 */
	retval = rt2x00lib_enable_radio(rt2x00dev);
	if (retval) {
		rt2x00lib_uninitialize(rt2x00dev);
		return retval;
	}

	rt2x00dev->intf_ap_count = 0;
	rt2x00dev->intf_sta_count = 0;
	rt2x00dev->intf_associated = 0;

	__set_bit(DEVICE_STARTED, &rt2x00dev->flags);

	return 0;
}

void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev)
{
	if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
		return;

	/*
	 * Perhaps we can add something smarter here,
	 * but for now just disabling the radio should do.
	 */
	rt2x00lib_disable_radio(rt2x00dev);

	rt2x00dev->intf_ap_count = 0;
	rt2x00dev->intf_sta_count = 0;
	rt2x00dev->intf_associated = 0;

	__clear_bit(DEVICE_STARTED, &rt2x00dev->flags);
}

/*
 * driver allocation handlers.
 */
int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
{
	int retval = -ENOMEM;

	/*
	 * Make room for rt2x00_intf inside the per-interface
	 * structure ieee80211_vif.
	 */
	rt2x00dev->hw->vif_data_size = sizeof(struct rt2x00_intf);

	/*
	 * Let the driver probe the device to detect the capabilities.
	 */
	retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev);
	if (retval) {
		ERROR(rt2x00dev, "Failed to allocate device.\n");
		goto exit;
	}

	/*
	 * Initialize configuration work.
	 */
	INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled);
	INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled);
	INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner);

	/*
	 * Allocate queue array.
	 */
	retval = rt2x00queue_allocate(rt2x00dev);
	if (retval)
		goto exit;

	/*
	 * Initialize ieee80211 structure.
	 */
	retval = rt2x00lib_probe_hw(rt2x00dev);
	if (retval) {
		ERROR(rt2x00dev, "Failed to initialize hw.\n");
		goto exit;
	}

	/*
	 * Register extra components.
	 */
	rt2x00leds_register(rt2x00dev);
	rt2x00rfkill_allocate(rt2x00dev);
	rt2x00debug_register(rt2x00dev);

	__set_bit(DEVICE_PRESENT, &rt2x00dev->flags);

	return 0;

exit:
	rt2x00lib_remove_dev(rt2x00dev);

	return retval;
}
EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev);

void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
{
	__clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);

	/*
	 * Disable radio.
	 */
	rt2x00lib_disable_radio(rt2x00dev);

	/*
	 * Uninitialize device.
	 */
	rt2x00lib_uninitialize(rt2x00dev);

	/*
	 * Free extra components
	 */
	rt2x00debug_deregister(rt2x00dev);
	rt2x00rfkill_free(rt2x00dev);
	rt2x00leds_unregister(rt2x00dev);

	/*
	 * Free ieee80211_hw memory.
	 */
	rt2x00lib_remove_hw(rt2x00dev);

	/*
	 * Free firmware image.
	 */
	rt2x00lib_free_firmware(rt2x00dev);

	/*
	 * Free queue structures.
	 */
	rt2x00queue_free(rt2x00dev);
}
EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev);

/*
 * Device state handlers
 */
#ifdef CONFIG_PM
int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state)
{
	int retval;

	NOTICE(rt2x00dev, "Going to sleep.\n");
	__clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);

	/*
	 * Only continue if mac80211 has open interfaces.
	 */
	if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
		goto exit;
	__set_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags);

	/*
	 * Disable radio.
	 */
	rt2x00lib_stop(rt2x00dev);
	rt2x00lib_uninitialize(rt2x00dev);

	/*
	 * Suspend/disable extra components.
	 */
	rt2x00leds_suspend(rt2x00dev);
	rt2x00rfkill_suspend(rt2x00dev);
	rt2x00debug_deregister(rt2x00dev);

exit:
	/*
	 * Set device mode to sleep for power management,
	 * on some hardware this call seems to consistently fail.
	 * From the specifications it is hard to tell why it fails,
	 * and if this is a "bad thing".
	 * Overall it is safe to just ignore the failure and
	 * continue suspending. The only downside is that the
	 * device will not be in optimal power save mode, but with
	 * the radio and the other components already disabled the
	 * device is as good as disabled.
	 */
	retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP);
	if (retval)
		WARNING(rt2x00dev, "Device failed to enter sleep state, "
			"continue suspending.\n");

	return 0;
}
EXPORT_SYMBOL_GPL(rt2x00lib_suspend);

static void rt2x00lib_resume_intf(void *data, u8 *mac,
				  struct ieee80211_vif *vif)
{
	struct rt2x00_dev *rt2x00dev = data;
	struct rt2x00_intf *intf = vif_to_intf(vif);

	spin_lock(&intf->lock);

	rt2x00lib_config_intf(rt2x00dev, intf,
			      vif->type, intf->mac, intf->bssid);


	/*
	 * Master or Ad-hoc mode require a new beacon update.
	 */
	if (vif->type == IEEE80211_IF_TYPE_AP ||
	    vif->type == IEEE80211_IF_TYPE_IBSS)
		intf->delayed_flags |= DELAYED_UPDATE_BEACON;

	spin_unlock(&intf->lock);
}

int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
{
	int retval;

	NOTICE(rt2x00dev, "Waking up.\n");

	/*
	 * Restore/enable extra components.
	 */
	rt2x00debug_register(rt2x00dev);
	rt2x00rfkill_resume(rt2x00dev);
	rt2x00leds_resume(rt2x00dev);

	/*
	 * Only continue if mac80211 had open interfaces.
	 */
	if (!__test_and_clear_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags))
		return 0;

	/*
	 * Reinitialize device and all active interfaces.
	 */
	retval = rt2x00lib_start(rt2x00dev);
	if (retval)
		goto exit;

	/*
	 * Reconfigure device.
	 */
	rt2x00lib_config(rt2x00dev, &rt2x00dev->hw->conf, 1);
	if (!rt2x00dev->hw->conf.radio_enabled)
		rt2x00lib_disable_radio(rt2x00dev);

	/*
	 * Iterator over each active interface to
	 * reconfigure the hardware.
	 */
	ieee80211_iterate_active_interfaces(rt2x00dev->hw,
					    rt2x00lib_resume_intf, rt2x00dev);

	/*
	 * We are ready again to receive requests from mac80211.
	 */
	__set_bit(DEVICE_PRESENT, &rt2x00dev->flags);

	/*
	 * It is possible that during that mac80211 has attempted
	 * to send frames while we were suspending or resuming.
	 * In that case we have disabled the TX queue and should
	 * now enable it again
	 */
	ieee80211_start_queues(rt2x00dev->hw);

	/*
	 * During interface iteration we might have changed the
	 * delayed_flags, time to handles the event by calling
	 * the work handler directly.
	 */
	rt2x00lib_intf_scheduled(&rt2x00dev->intf_work);

	return 0;

exit:
	rt2x00lib_disable_radio(rt2x00dev);
	rt2x00lib_uninitialize(rt2x00dev);
	rt2x00debug_deregister(rt2x00dev);

	return retval;
}
EXPORT_SYMBOL_GPL(rt2x00lib_resume);
#endif /* CONFIG_PM */

/*
 * rt2x00lib module information.
 */
MODULE_AUTHOR(DRV_PROJECT);
MODULE_VERSION(DRV_VERSION);
MODULE_DESCRIPTION("rt2x00 library");
MODULE_LICENSE("GPL");