Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 285 insertions, 0 deletions

diff --git a/kernel/drivers/net/wireless/rt2x00/rt2x00config.c b/kernel/drivers/net/wireless/rt2x00/rt2x00config.c
new file mode 100644
index 000000000..48a2cad29
--- /dev/null
+++ b/kernel/drivers/net/wireless/rt2x00/rt2x00config.c
@@ -0,0 +1,285 @@
+/*
+	Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
+	<http://rt2x00.serialmonkey.com>
+
+	This program is free software; you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation; either version 2 of the License, or
+	(at your option) any later version.
+
+	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, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+	Module: rt2x00lib
+	Abstract: rt2x00 generic configuration routines.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+
+#include "rt2x00.h"
+#include "rt2x00lib.h"
+
+void rt2x00lib_config_intf(struct rt2x00_dev *rt2x00dev,
+			   struct rt2x00_intf *intf,
+			   enum nl80211_iftype type,
+			   const u8 *mac, const u8 *bssid)
+{
+	struct rt2x00intf_conf conf;
+	unsigned int flags = 0;
+
+	conf.type = type;
+
+	switch (type) {
+	case NL80211_IFTYPE_ADHOC:
+		conf.sync = TSF_SYNC_ADHOC;
+		break;
+	case NL80211_IFTYPE_AP:
+	case NL80211_IFTYPE_MESH_POINT:
+	case NL80211_IFTYPE_WDS:
+		conf.sync = TSF_SYNC_AP_NONE;
+		break;
+	case NL80211_IFTYPE_STATION:
+		conf.sync = TSF_SYNC_INFRA;
+		break;
+	default:
+		conf.sync = TSF_SYNC_NONE;
+		break;
+	}
+
+	/*
+	 * Note that when NULL is passed as address we will send
+	 * 00:00:00:00:00 to the device to clear the address.
+	 * This will prevent the device being confused when it wants
+	 * to ACK frames or considers itself associated.
+	 */
+	memset(conf.mac, 0, sizeof(conf.mac));
+	if (mac)
+		memcpy(conf.mac, mac, ETH_ALEN);
+
+	memset(conf.bssid, 0, sizeof(conf.bssid));
+	if (bssid)
+		memcpy(conf.bssid, bssid, ETH_ALEN);
+
+	flags |= CONFIG_UPDATE_TYPE;
+	if (mac || (!rt2x00dev->intf_ap_count && !rt2x00dev->intf_sta_count))
+		flags |= CONFIG_UPDATE_MAC;
+	if (bssid || (!rt2x00dev->intf_ap_count && !rt2x00dev->intf_sta_count))
+		flags |= CONFIG_UPDATE_BSSID;
+
+	rt2x00dev->ops->lib->config_intf(rt2x00dev, intf, &conf, flags);
+}
+
+void rt2x00lib_config_erp(struct rt2x00_dev *rt2x00dev,
+			  struct rt2x00_intf *intf,
+			  struct ieee80211_bss_conf *bss_conf,
+			  u32 changed)
+{
+	struct rt2x00lib_erp erp;
+
+	memset(&erp, 0, sizeof(erp));
+
+	erp.short_preamble = bss_conf->use_short_preamble;
+	erp.cts_protection = bss_conf->use_cts_prot;
+
+	erp.slot_time = bss_conf->use_short_slot ? SHORT_SLOT_TIME : SLOT_TIME;
+	erp.sifs = SIFS;
+	erp.pifs = bss_conf->use_short_slot ? SHORT_PIFS : PIFS;
+	erp.difs = bss_conf->use_short_slot ? SHORT_DIFS : DIFS;
+	erp.eifs = bss_conf->use_short_slot ? SHORT_EIFS : EIFS;
+
+	erp.basic_rates = bss_conf->basic_rates;
+	erp.beacon_int = bss_conf->beacon_int;
+
+	/* Update the AID, this is needed for dynamic PS support */
+	rt2x00dev->aid = bss_conf->assoc ? bss_conf->aid : 0;
+	rt2x00dev->last_beacon = bss_conf->sync_tsf;
+
+	/* Update global beacon interval time, this is needed for PS support */
+	rt2x00dev->beacon_int = bss_conf->beacon_int;
+
+	if (changed & BSS_CHANGED_HT)
+		erp.ht_opmode = bss_conf->ht_operation_mode;
+
+	rt2x00dev->ops->lib->config_erp(rt2x00dev, &erp, changed);
+}
+
+void rt2x00lib_config_antenna(struct rt2x00_dev *rt2x00dev,
+			      struct antenna_setup config)
+{
+	struct link_ant *ant = &rt2x00dev->link.ant;
+	struct antenna_setup *def = &rt2x00dev->default_ant;
+	struct antenna_setup *active = &rt2x00dev->link.ant.active;
+
+	/*
+	 * When the caller tries to send the SW diversity,
+	 * we must update the ANTENNA_RX_DIVERSITY flag to
+	 * enable the antenna diversity in the link tuner.
+	 *
+	 * Secondly, we must guarentee we never send the
+	 * software antenna diversity command to the driver.
+	 */
+	if (!(ant->flags & ANTENNA_RX_DIVERSITY)) {
+		if (config.rx == ANTENNA_SW_DIVERSITY) {
+			ant->flags |= ANTENNA_RX_DIVERSITY;
+
+			if (def->rx == ANTENNA_SW_DIVERSITY)
+				config.rx = ANTENNA_B;
+			else
+				config.rx = def->rx;
+		}
+	} else if (config.rx == ANTENNA_SW_DIVERSITY)
+		config.rx = active->rx;
+
+	if (!(ant->flags & ANTENNA_TX_DIVERSITY)) {
+		if (config.tx == ANTENNA_SW_DIVERSITY) {
+			ant->flags |= ANTENNA_TX_DIVERSITY;
+
+			if (def->tx == ANTENNA_SW_DIVERSITY)
+				config.tx = ANTENNA_B;
+			else
+				config.tx = def->tx;
+		}
+	} else if (config.tx == ANTENNA_SW_DIVERSITY)
+		config.tx = active->tx;
+
+	/*
+	 * Antenna setup changes require the RX to be disabled,
+	 * else the changes will be ignored by the device.
+	 */
+	if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
+		rt2x00queue_stop_queue(rt2x00dev->rx);
+
+	/*
+	 * Write new antenna setup to device and reset the link tuner.
+	 * The latter is required since we need to recalibrate the
+	 * noise-sensitivity ratio for the new setup.
+	 */
+	rt2x00dev->ops->lib->config_ant(rt2x00dev, &config);
+
+	rt2x00link_reset_tuner(rt2x00dev, true);
+
+	memcpy(active, &config, sizeof(config));
+
+	if (test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
+		rt2x00queue_start_queue(rt2x00dev->rx);
+}
+
+static u16 rt2x00ht_center_channel(struct rt2x00_dev *rt2x00dev,
+				   struct ieee80211_conf *conf)
+{
+	struct hw_mode_spec *spec = &rt2x00dev->spec;
+	int center_channel;
+	u16 i;
+
+	/*
+	 * Initialize center channel to current channel.
+	 */
+	center_channel = spec->channels[conf->chandef.chan->hw_value].channel;
+
+	/*
+	 * Adjust center channel to HT40+ and HT40- operation.
+	 */
+	if (conf_is_ht40_plus(conf))
+		center_channel += 2;
+	else if (conf_is_ht40_minus(conf))
+		center_channel -= (center_channel == 14) ? 1 : 2;
+
+	for (i = 0; i < spec->num_channels; i++)
+		if (spec->channels[i].channel == center_channel)
+			return i;
+
+	WARN_ON(1);
+	return conf->chandef.chan->hw_value;
+}
+
+void rt2x00lib_config(struct rt2x00_dev *rt2x00dev,
+		      struct ieee80211_conf *conf,
+		      unsigned int ieee80211_flags)
+{
+	struct rt2x00lib_conf libconf;
+	u16 hw_value;
+	u16 autowake_timeout;
+	u16 beacon_int;
+	u16 beacon_diff;
+
+	memset(&libconf, 0, sizeof(libconf));
+
+	libconf.conf = conf;
+
+	if (ieee80211_flags & IEEE80211_CONF_CHANGE_CHANNEL) {
+		if (!conf_is_ht(conf))
+			set_bit(CONFIG_HT_DISABLED, &rt2x00dev->flags);
+		else
+			clear_bit(CONFIG_HT_DISABLED, &rt2x00dev->flags);
+
+		if (conf_is_ht40(conf)) {
+			set_bit(CONFIG_CHANNEL_HT40, &rt2x00dev->flags);
+			hw_value = rt2x00ht_center_channel(rt2x00dev, conf);
+		} else {
+			clear_bit(CONFIG_CHANNEL_HT40, &rt2x00dev->flags);
+			hw_value = conf->chandef.chan->hw_value;
+		}
+
+		memcpy(&libconf.rf,
+		       &rt2x00dev->spec.channels[hw_value],
+		       sizeof(libconf.rf));
+
+		memcpy(&libconf.channel,
+		       &rt2x00dev->spec.channels_info[hw_value],
+		       sizeof(libconf.channel));
+
+		/* Used for VCO periodic calibration */
+		rt2x00dev->rf_channel = libconf.rf.channel;
+	}
+
+	if (rt2x00_has_cap_flag(rt2x00dev, REQUIRE_PS_AUTOWAKE) &&
+	    (ieee80211_flags & IEEE80211_CONF_CHANGE_PS))
+		cancel_delayed_work_sync(&rt2x00dev->autowakeup_work);
+
+	/*
+	 * Start configuration.
+	 */
+	rt2x00dev->ops->lib->config(rt2x00dev, &libconf, ieee80211_flags);
+
+	/*
+	 * Some configuration changes affect the link quality
+	 * which means we need to reset the link tuner.
+	 */
+	if (ieee80211_flags & IEEE80211_CONF_CHANGE_CHANNEL)
+		rt2x00link_reset_tuner(rt2x00dev, false);
+
+	if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) &&
+	    rt2x00_has_cap_flag(rt2x00dev, REQUIRE_PS_AUTOWAKE) &&
+	    (ieee80211_flags & IEEE80211_CONF_CHANGE_PS) &&
+	    (conf->flags & IEEE80211_CONF_PS)) {
+		beacon_diff = (long)jiffies - (long)rt2x00dev->last_beacon;
+		beacon_int = msecs_to_jiffies(rt2x00dev->beacon_int);
+
+		if (beacon_diff > beacon_int)
+			beacon_diff = 0;
+
+		autowake_timeout = (conf->max_sleep_period * beacon_int) - beacon_diff;
+		queue_delayed_work(rt2x00dev->workqueue,
+				   &rt2x00dev->autowakeup_work,
+				   autowake_timeout - 15);
+	}
+
+	if (conf->flags & IEEE80211_CONF_PS)
+		set_bit(CONFIG_POWERSAVING, &rt2x00dev->flags);
+	else
+		clear_bit(CONFIG_POWERSAVING, &rt2x00dev->flags);
+
+	rt2x00dev->curr_band = conf->chandef.chan->band;
+	rt2x00dev->curr_freq = conf->chandef.chan->center_freq;
+	rt2x00dev->tx_power = conf->power_level;
+	rt2x00dev->short_retry = conf->short_frame_max_tx_count;
+	rt2x00dev->long_retry = conf->long_frame_max_tx_count;
+}