path: root/drivers/net/wireless/rtlwifi/core.c

/******************************************************************************
 *
 * Copyright(c) 2009-2010  Realtek Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License 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.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
 *
 * The full GNU General Public License is included in this distribution in the
 * file called LICENSE.
 *
 * Contact Information:
 * wlanfae <wlanfae@realtek.com>
 * Realtek Corporation, No. 2, Innovation Road II, Hsinchu Science Park,
 * Hsinchu 300, Taiwan.
 *
 * Larry Finger <Larry.Finger@lwfinger.net>
 *****************************************************************************/

#include "wifi.h"
#include "core.h"
#include "cam.h"
#include "base.h"
#include "ps.h"

/*mutex for start & stop is must here. */
static int rtl_op_start(struct ieee80211_hw *hw)
{
	int err = 0;
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));

	if (!is_hal_stop(rtlhal))
		return 0;
	if (!test_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status))
		return 0;
	mutex_lock(&rtlpriv->locks.conf_mutex);
	err = rtlpriv->intf_ops->adapter_start(hw);
	if (err)
		goto out;
	rtl_watch_dog_timer_callback((unsigned long)hw);
out:
	mutex_unlock(&rtlpriv->locks.conf_mutex);
	return err;
}

static void rtl_op_stop(struct ieee80211_hw *hw)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
	struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));

	if (is_hal_stop(rtlhal))
		return;

	if (unlikely(ppsc->rfpwr_state == ERFOFF)) {
		rtl_ips_nic_on(hw);
		mdelay(1);
	}

	mutex_lock(&rtlpriv->locks.conf_mutex);

	mac->link_state = MAC80211_NOLINK;
	memset(mac->bssid, 0, 6);

	/*reset sec info */
	rtl_cam_reset_sec_info(hw);

	rtl_deinit_deferred_work(hw);
	rtlpriv->intf_ops->adapter_stop(hw);

	mutex_unlock(&rtlpriv->locks.conf_mutex);
}

static void rtl_op_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_hal *rtlhal = rtl_hal(rtl_priv(hw));
	struct rtl_ps_ctl *ppsc = rtl_psc(rtl_priv(hw));

	if (unlikely(is_hal_stop(rtlhal) || ppsc->rfpwr_state != ERFON))
		goto err_free;

	if (!test_bit(RTL_STATUS_INTERFACE_START, &rtlpriv->status))
		goto err_free;


	rtlpriv->intf_ops->adapter_tx(hw, skb);

	return;

err_free:
	dev_kfree_skb_any(skb);
}

static int rtl_op_add_interface(struct ieee80211_hw *hw,
		struct ieee80211_vif *vif)
{
	struct rtl_priv *rtlpriv = rtl_priv(hw);
	struct rtl_mac *mac = rtl_mac(rtl_priv(hw));
	int err = 0;

	if (mac->vif) {
		RT_TRACE(rtlpriv, COMP_ERR, DBG_WARNING,
			 ("vif has been set!! mac->vif = 0x%p\n", mac->vif));
		return -EOPNOTSUPP;
	}

	rtl_ips_nic_on(hw);

	mutex_lock(&rtlpriv->locks.conf_mutex);
	switch (vif->type) {
	case NL80211_IFTYPE_STATION:
		if (mac->beacon_enabled == 1) {
			RT_TRACE(rtlpriv, COMP_MAC80211, DBG_LOUD,
				 ("NL80211_IFTYPE_STATION\n"));
			mac->beacon_enabled = 0;
			rtlpriv->cfg->ops->update_interrupt_mask(hw, 0,
					rtlpriv->cfg->maps
					[RTL_IBSS_INT_MASKS]);
		}
		break;
	case NL80211_IFTYPE_ADHOC:
		RT_TRACE(rtlpriv, COMP_MAC80211, DBG_LOUD,
			 ("NL80211_IFTYPE_ADHOC\n"));

		mac->link_state = MAC80211_LINKED;
		rtlpriv->cfg->ops->set_bcn_reg(hw);
		break;
	case NL80211_IFTYPE_AP:
		RT_TRACE(rtlpr