/* This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * Authors:
 * Alexander Aring <aar@pengutronix.de>
 *
 * Based on: net/mac80211/cfg.c
 */

#include <net/rtnetlink.h>
#include <net/cfg802154.h>

#include "ieee802154_i.h"
#include "driver-ops.h"
#include "cfg.h"

static struct net_device *
ieee802154_add_iface_deprecated(struct wpan_phy *wpan_phy,
				const char *name,
				unsigned char name_assign_type, int type)
{
	struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
	struct net_device *dev;

	rtnl_lock();
	dev = ieee802154_if_add(local, name, name_assign_type, type,
				cpu_to_le64(0x0000000000000000ULL));
	rtnl_unlock();

	return dev;
}

static void ieee802154_del_iface_deprecated(struct wpan_phy *wpan_phy,
					    struct net_device *dev)
{
	struct ieee802154_sub_if_data *sdata = IEEE802154_DEV_TO_SUB_IF(dev);

	ieee802154_if_remove(sdata);
}

#ifdef CONFIG_PM
static int ieee802154_suspend(struct wpan_phy *wpan_phy)
{
	struct ieee802154_local *local = wpan_phy_priv(wpan_phy);

	if (!local->open_count)
		goto suspend;

	ieee802154_stop_queue(&local->hw);
	synchronize_net();

	/* stop hardware - this must stop RX */
	ieee802154_stop_device(local);

suspend:
	local->suspended = true;
	return 0;
}

static int ieee802154_resume(struct wpan_phy *wpan_phy)
{
	struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
	int ret;

	/* nothing to do if HW shouldn't run */
	if (!local->open_count)
		goto wake_up;

	/* restart hardware */
	ret = drv_start(local);
	if (ret)
		return ret;

wake_up:
	ieee802154_wake_queue(&local->hw);
	local->suspended = false;
	return 0;
}
#else
#define ieee802154_suspend NULL
#define ieee802154_resume NULL
#endif

static int
ieee802154_add_iface(struct wpan_phy *phy, const char *name,
		     unsigned char name_assign_type,
		     enum nl802154_iftype type, __le64 extended_addr)
{
	struct ieee802154_local *local = wpan_phy_priv(phy);
	struct net_device *err;

	err = ieee802154_if_add(local, name, name_assign_type, type,
				extended_addr);
	return PTR_ERR_OR_ZERO(err);
}

static int
ieee802154_del_iface(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev)
{
	ieee802154_if_remove(IEEE802154_WPAN_DEV_TO_SUB_IF(wpan_dev));

	return 0;
}

static int
ieee802154_set_channel(struct wpan_phy *wpan_phy, u8 page, u8 channel)
{
	struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
	int ret;

	ASSERT_RTNL();

	if (wpan_phy->current_page == page &&
	    wpan_phy->current_channel == channel)
		return 0;

	ret = drv_set_channel(local, page, channel);
	if (!ret) {
		wpan_phy->current_page = page;
		wpan_phy->current_channel = channel;
	}

	return ret;
}

static int
ieee802154_set_cca_mode(struct wpan_phy *wpan_phy,
			const struct wpan_phy_cca *cca)
{
	struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
	int ret;

	ASSERT_RTNL();

	if (wpan_phy_cca_cmp(&wpan_phy->cca, cca))
		return 0;

	ret = drv_set_cca_mode(local, cca);
	if (!ret)
		wpan_phy->cca = *cca;

	return ret;
}

static int
ieee802154_set_cca_ed_level(struct wpan_phy *wpan_phy, s32 ed_level)
{
	struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
	int ret;

	ASSERT_RTNL();

	if (wpan_phy->cca_ed_level == ed_level)
		return 0;

	ret = drv_set_cca_ed_level(local, ed_level);
	if (!ret)
		wpan_phy->cca_ed_level = ed_level;

	return ret;
}

static int
ieee802154_set_tx_power(struct wpan_phy *wpan_phy, s32 power)
{
	struct ieee802154_local *local = wpan_phy_priv(wpan_phy);
	int ret;

	ASSERT_RTNL();

	if (wpan_phy->transmit_power == power)
		return 0;

	ret = drv_set_tx_power(local, power);
	if (!ret)
		wpan_phy->transmit_power = power;

	return ret;
}

static int
ieee802154_set_pan_id(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
		      __le16 pan_id)
{
	int ret;

	ASSERT_RTNL();

	if (wpan_dev->pan_id == pan_id)
		return 0;

	ret = mac802154_wpan_update_llsec(wpan_dev->netdev);
	if (!ret)
		wpan_dev->pan_id = pan_id;

	return ret;
}

static int
ieee802154_set_backoff_exponent(struct wpan_phy *wpan_phy,
				struct wpan_dev *wpan_dev,
				u8 min_be, u8 max_be)
{
	ASSERT_RTNL();

	if (wpan_dev->min_be == min_be &&
	    wpan_dev->max_be == max_be)
		return 0;

	wpan_dev->min_be = min_be;
	wpan_dev->max_be = max_be;
	return 0;
}

static int
ieee802154_set_short_addr(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
			  __le16 short_addr)
{
	ASSERT_RTNL();

	if (wpan_dev->short_addr == short_addr)
		return 0;

	wpan_dev->short_addr = short_addr;
	return 0;
}

static int
ieee802154_set_max_csma_backoffs(struct wpan_phy *wpan_phy,
				 struct wpan_dev *wpan_dev,
				 u8 max_csma_backoffs)
{
	ASSERT_RTNL();

	if (wpan_dev->csma_retries == max_csma_backoffs)
		return 0;

	wpan_dev->csma_retries = max_csma_backoffs;
	return 0;
}

static int
ieee802154_set_max_frame_retries(struct wpan_phy *wpan_phy,
				 struct wpan_dev *wpan_dev,
				 s8 max_frame_retries)
{
	ASSERT_RTNL();

	if (wpan_dev->frame_retries == max_frame_retries)
		return 0;

	wpan_dev->frame_retries = max_frame_retries;
	return 0;
}

static int
ieee802154_set_lbt_mode(struct wpan_phy *wpan_phy, struct wpan_dev *wpan_dev,
			bool mode)
{
	ASSERT_RTNL();

	if (wpan_dev->lbt == mode)
		return 0;

	wpan_dev->lbt = mode;
	return 0;
}

const struct cfg802154_ops mac802154_config_ops = {
	.add_virtual_intf_deprecated = ieee802154_add_iface_deprecated,
	.del_virtual_intf_deprecated = ieee802154_del_iface_deprecated,
	.suspend = ieee802154_suspend,
	.resume = ieee802154_resume,
	.add_virtual_intf = ieee802154_add_iface,
	.del_virtual_intf = ieee802154_del_iface,
	.set_channel = ieee802154_set_channel,
	.set_cca_mode = ieee802154_set_cca_mode,
	.set_cca_ed_level = ieee802154_set_cca_ed_level,
	.set_tx_power = ieee802154_set_tx_power,
	.set_pan_id = ieee802154_set_pan_id,
	.set_short_addr = ieee802154_set_short_addr,
	.set_backoff_exponent = ieee802154_set_backoff_exponent,
	.set_max_csma_backoffs = ieee802154_set_max_csma_backoffs,
	.set_max_frame_retries = ieee802154_set_max_frame_retries,
	.set_lbt_mode = ieee802154_set_lbt_mode,
};