Linux-libre 4.5-gnu

1 files changed, 0 insertions, 492 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2x00link.c b/drivers/net/wireless/rt2x00/rt2x00link.c
deleted file mode 100644
index 017188e5a..000000000
--- a/drivers/net/wireless/rt2x00/rt2x00link.c
+++ /dev/null
@@ -1,492 +0,0 @@
-/*
-	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 link tuning routines.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-
-#include "rt2x00.h"
-#include "rt2x00lib.h"
-
-/*
- * When we lack RSSI information return something less then -80 to
- * tell the driver to tune the device to maximum sensitivity.
- */
-#define DEFAULT_RSSI		-128
-
-static inline int rt2x00link_get_avg_rssi(struct ewma_rssi *ewma)
-{
-	unsigned long avg;
-
-	avg = ewma_rssi_read(ewma);
-	if (avg)
-		return -avg;
-
-	return DEFAULT_RSSI;
-}
-
-static int rt2x00link_antenna_get_link_rssi(struct rt2x00_dev *rt2x00dev)
-{
-	struct link_ant *ant = &rt2x00dev->link.ant;
-
-	if (rt2x00dev->link.qual.rx_success)
-		return rt2x00link_get_avg_rssi(&ant->rssi_ant);
-
-	return DEFAULT_RSSI;
-}
-
-static int rt2x00link_antenna_get_rssi_history(struct rt2x00_dev *rt2x00dev)
-{
-	struct link_ant *ant = &rt2x00dev->link.ant;
-
-	if (ant->rssi_history)
-		return ant->rssi_history;
-	return DEFAULT_RSSI;
-}
-
-static void rt2x00link_antenna_update_rssi_history(struct rt2x00_dev *rt2x00dev,
-						   int rssi)
-{
-	struct link_ant *ant = &rt2x00dev->link.ant;
-	ant->rssi_history = rssi;
-}
-
-static void rt2x00link_antenna_reset(struct rt2x00_dev *rt2x00dev)
-{
-	ewma_rssi_init(&rt2x00dev->link.ant.rssi_ant);
-}
-
-static void rt2x00lib_antenna_diversity_sample(struct rt2x00_dev *rt2x00dev)
-{
-	struct link_ant *ant = &rt2x00dev->link.ant;
-	struct antenna_setup new_ant;
-	int other_antenna;
-
-	int sample_current = rt2x00link_antenna_get_link_rssi(rt2x00dev);
-	int sample_other = rt2x00link_antenna_get_rssi_history(rt2x00dev);
-
-	memcpy(&new_ant, &ant->active, sizeof(new_ant));
-
-	/*
-	 * We are done sampling. Now we should evaluate the results.
-	 */
-	ant->flags &= ~ANTENNA_MODE_SAMPLE;
-
-	/*
-	 * During the last period we have sampled the RSSI
-	 * from both antennas. It now is time to determine
-	 * which antenna demonstrated the best performance.
-	 * When we are already on the antenna with the best
-	 * performance, just create a good starting point
-	 * for the history and we are done.
-	 */
-	if (sample_current >= sample_other) {
-		rt2x00link_antenna_update_rssi_history(rt2x00dev,
-			sample_current);
-		return;
-	}
-
-	other_antenna = (ant->active.rx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
-
-	if (ant->flags & ANTENNA_RX_DIVERSITY)
-		new_ant.rx = other_antenna;
-
-	if (ant->flags & ANTENNA_TX_DIVERSITY)
-		new_ant.tx = other_antenna;
-
-	rt2x00lib_config_antenna(rt2x00dev, new_ant);
-}
-
-static void rt2x00lib_antenna_diversity_eval(struct rt2x00_dev *rt2x00dev)
-{
-	struct link_ant *ant = &rt2x00dev->link.ant;
-	struct antenna_setup new_ant;
-	int rssi_curr;
-	int rssi_old;
-
-	memcpy(&new_ant, &ant->active, sizeof(new_ant));
-
-	/*
-	 * Get current RSSI value along with the historical value,
-	 * after that update the history with the current value.
-	 */
-	rssi_curr = rt2x00link_antenna_get_link_rssi(rt2x00dev);
-	rssi_old = rt2x00link_antenna_get_rssi_history(rt2x00dev);
-	rt2x00link_antenna_update_rssi_history(rt2x00dev, rssi_curr);
-
-	/*
-	 * Legacy driver indicates that we should swap antenna's
-	 * when the difference in RSSI is greater that 5. This
-	 * also should be done when the RSSI was actually better
-	 * then the previous sample.
-	 * When the difference exceeds the threshold we should
-	 * sample the rssi from the other antenna to make a valid
-	 * comparison between the 2 antennas.
-	 */
-	if (abs(rssi_curr - rssi_old) < 5)
-		return;
-
-	ant->flags |= ANTENNA_MODE_SAMPLE;
-
-	if (ant->flags & ANTENNA_RX_DIVERSITY)
-		new_ant.rx = (new_ant.rx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
-
-	if (ant->flags & ANTENNA_TX_DIVERSITY)
-		new_ant.tx = (new_ant.tx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
-
-	rt2x00lib_config_antenna(rt2x00dev, new_ant);
-}
-
-static bool rt2x00lib_antenna_diversity(struct rt2x00_dev *rt2x00dev)
-{
-	struct link_ant *ant = &rt2x00dev->link.ant;
-
-	/*
-	 * Determine if software diversity is enabled for
-	 * either the TX or RX antenna (or both).
-	 */
-	if (!(ant->flags & ANTENNA_RX_DIVERSITY) &&
-	    !(ant->flags & ANTENNA_TX_DIVERSITY)) {
-		ant->flags = 0;
-		return true;
-	}
-
-	/*
-	 * If we have only sampled the data over the last period
-	 * we should now harvest the data. Otherwise just evaluate
-	 * the data. The latter should only be performed once
-	 * every 2 seconds.
-	 */
-	if (ant->flags & ANTENNA_MODE_SAMPLE) {
-		rt2x00lib_antenna_diversity_sample(rt2x00dev);
-		return true;
-	} else if (rt2x00dev->link.count & 1) {
-		rt2x00lib_antenna_diversity_eval(rt2x00dev);
-		return true;
-	}
-
-	return false;
-}
-
-void rt2x00link_update_stats(struct rt2x00_dev *rt2x00dev,
-			     struct sk_buff *skb,
-			     struct rxdone_entry_desc *rxdesc)
-{
-	struct link *link = &rt2x00dev->link;
-	struct link_qual *qual = &rt2x00dev->link.qual;
-	struct link_ant *ant = &rt2x00dev->link.ant;
-	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
-
-	/*
-	 * No need to update the stats for !=STA interfaces
-	 */
-	if (!rt2x00dev->intf_sta_count)
-		return;
-
-	/*
-	 * Frame was received successfully since non-succesfull
-	 * frames would have been dropped by the hardware.
-	 */
-	qual->rx_success++;
-
-	/*
-	 * We are only interested in quality statistics from
-	 * beacons which came from the BSS which we are
-	 * associated with.
-	 */
-	if (!ieee80211_is_beacon(hdr->frame_control) ||
-	    !(rxdesc->dev_flags & RXDONE_MY_BSS))
-		return;
-
-	/*
-	 * Update global RSSI
-	 */
-	ewma_rssi_add(&link->avg_rssi, -rxdesc->rssi);
-
-	/*
-	 * Update antenna RSSI
-	 */
-	ewma_rssi_add(&ant->rssi_ant, -rxdesc->rssi);
-}
-
-void rt2x00link_start_tuner(struct rt2x00_dev *rt2x00dev)
-{
-	struct link *link = &rt2x00dev->link;
-
-	/*
-	 * Link tuning should only be performed when
-	 * an active sta interface exists. AP interfaces
-	 * don't need link tuning and monitor mode interfaces
-	 * should never have to work with link tuners.
-	 */
-	if (!rt2x00dev->intf_sta_count)
-		return;
-
-	/**
-	 * While scanning, link tuning is disabled. By default
-	 * the most sensitive settings will be used to make sure
-	 * that all beacons and probe responses will be received
-	 * during the scan.
-	 */
-	if (test_bit(DEVICE_STATE_SCANNING, &rt2x00dev->flags))
-		return;
-
-	rt2x00link_reset_tuner(rt2x00dev, false);
-
-	if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
-		ieee80211_queue_delayed_work(rt2x00dev->hw,
-					     &link->work, LINK_TUNE_INTERVAL);
-}
-
-void rt2x00link_stop_tuner(struct rt2x00_dev *rt2x00dev)
-{
-	cancel_delayed_work_sync(&rt2x00dev->link.work);
-}
-
-void rt2x00link_reset_tuner(struct rt2x00_dev *rt2x00dev, bool antenna)
-{
-	struct link_qual *qual = &rt2x00dev->link.qual;
-	u8 vgc_level = qual->vgc_level_reg;
-
-	if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
-		return;
-
-	/*
-	 * Reset link information.
-	 * Both the currently active vgc level as well as
-	 * the link tuner counter should be reset. Resetting
-	 * the counter is important for devices where the
-	 * device should only perform link tuning during the
-	 * first minute after being enabled.
-	 */
-	rt2x00dev->link.count = 0;
-	memset(qual, 0, sizeof(*qual));
-	ewma_rssi_init(&rt2x00dev->link.avg_rssi);
-
-	/*
-	 * Restore the VGC level as stored in the registers,
-	 * the driver can use this to determine if the register
-	 * must be updated during reset or not.
-	 */
-	qual->vgc_level_reg = vgc_level;
-
-	/*
-	 * Reset the link tuner.
-	 */
-	rt2x00dev->ops->lib->reset_tuner(rt2x00dev, qual);
-
-	if (antenna)
-		rt2x00link_antenna_reset(rt2x00dev);
-}
-
-static void rt2x00link_reset_qual(struct rt2x00_dev *rt2x00dev)
-{
-	struct link_qual *qual = &rt2x00dev->link.qual;
-
-	qual->rx_success = 0;
-	qual->rx_failed = 0;
-	qual->tx_success = 0;
-	qual->tx_failed = 0;
-}
-
-static void rt2x00link_tuner(struct work_struct *work)
-{
-	struct rt2x00_dev *rt2x00dev =
-	    container_of(work, struct rt2x00_dev, link.work.work);
-	struct link *link = &rt2x00dev->link;
-	struct link_qual *qual = &rt2x00dev->link.qual;
-
-	/*
-	 * When the radio is shutting down we should
-	 * immediately cease all link tuning.
-	 */
-	if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags) ||
-	    test_bit(DEVICE_STATE_SCANNING, &rt2x00dev->flags))
-		return;
-
-	/*
-	 * Update statistics.
-	 */
-	rt2x00dev->ops->lib->link_stats(rt2x00dev, qual);
-	rt2x00dev->low_level_stats.dot11FCSErrorCount += qual->rx_failed;
-
-	/*
-	 * Update quality RSSI for link tuning,
-	 * when we have received some frames and we managed to
-	 * collect the RSSI data we could use this. Otherwise we
-	 * must fallback to the default RSSI value.
-	 */
-	if (!qual->rx_success)
-		qual->rssi = DEFAULT_RSSI;
-	else
-		qual->rssi = rt2x00link_get_avg_rssi(&link->avg_rssi);
-
-	/*
-	 * Check if link tuning is supported by the hardware, some hardware
-	 * do not support link tuning at all, while other devices can disable
-	 * the feature from the EEPROM.
-	 */
-	if (rt2x00_has_cap_link_tuning(rt2x00dev))
-		rt2x00dev->ops->lib->link_tuner(rt2x00dev, qual, link->count);
-
-	/*
-	 * Send a signal to the led to update the led signal strength.
-	 */
-	rt2x00leds_led_quality(rt2x00dev, qual->rssi);
-
-	/*
-	 * Evaluate antenna setup, make this the last step when
-	 * rt2x00lib_antenna_diversity made changes the quality
-	 * statistics will be reset.
-	 */
-	if (rt2x00lib_antenna_diversity(rt2x00dev))
-		rt2x00link_reset_qual(rt2x00dev);
-
-	/*
-	 * Increase tuner counter, and reschedule the next link tuner run.
-	 */
-	link->count++;
-
-	if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
-		ieee80211_queue_delayed_work(rt2x00dev->hw,
-					     &link->work, LINK_TUNE_INTERVAL);
-}
-
-void rt2x00link_start_watchdog(struct rt2x00_dev *rt2x00dev)
-{
-	struct link *link = &rt2x00dev->link;
-
-	if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) &&
-	    rt2x00dev->ops->lib->watchdog)
-		ieee80211_queue_delayed_work(rt2x00dev->hw,
-					     &link->watchdog_work,
-					     WATCHDOG_INTERVAL);
-}
-
-void rt2x00link_stop_watchdog(struct rt2x00_dev *rt2x00dev)
-{
-	cancel_delayed_work_sync(&rt2x00dev->link.watchdog_work);
-}
-
-static void rt2x00link_watchdog(struct work_struct *work)
-{
-	struct rt2x00_dev *rt2x00dev =
-	    container_of(work, struct rt2x00_dev, link.watchdog_work.work);
-	struct link *link = &rt2x00dev->link;
-
-	/*
-	 * When the radio is shutting down we should
-	 * immediately cease the watchdog monitoring.
-	 */
-	if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
-		return;
-
-	rt2x00dev->ops->lib->watchdog(rt2x00dev);
-
-	if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
-		ieee80211_queue_delayed_work(rt2x00dev->hw,
-					     &link->watchdog_work,
-					     WATCHDOG_INTERVAL);
-}
-
-void rt2x00link_start_agc(struct rt2x00_dev *rt2x00dev)
-{
-	struct link *link = &rt2x00dev->link;
-
-	if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) &&
-	    rt2x00dev->ops->lib->gain_calibration)
-		ieee80211_queue_delayed_work(rt2x00dev->hw,
-					     &link->agc_work,
-					     AGC_INTERVAL);
-}
-
-void rt2x00link_start_vcocal(struct rt2x00_dev *rt2x00dev)
-{
-	struct link *link = &rt2x00dev->link;
-
-	if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) &&
-	    rt2x00dev->ops->lib->vco_calibration)
-		ieee80211_queue_delayed_work(rt2x00dev->hw,
-					     &link->vco_work,
-					     VCO_INTERVAL);
-}
-
-void rt2x00link_stop_agc(struct rt2x00_dev *rt2x00dev)
-{
-	cancel_delayed_work_sync(&rt2x00dev->link.agc_work);
-}
-
-void rt2x00link_stop_vcocal(struct rt2x00_dev *rt2x00dev)
-{
-	cancel_delayed_work_sync(&rt2x00dev->link.vco_work);
-}
-
-static void rt2x00link_agc(struct work_struct *work)
-{
-	struct rt2x00_dev *rt2x00dev =
-	    container_of(work, struct rt2x00_dev, link.agc_work.work);
-	struct link *link = &rt2x00dev->link;
-
-	/*
-	 * When the radio is shutting down we should
-	 * immediately cease the watchdog monitoring.
-	 */
-	if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
-		return;
-
-	rt2x00dev->ops->lib->gain_calibration(rt2x00dev);
-
-	if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
-		ieee80211_queue_delayed_work(rt2x00dev->hw,
-					     &link->agc_work,
-					     AGC_INTERVAL);
-}
-
-static void rt2x00link_vcocal(struct work_struct *work)
-{
-	struct rt2x00_dev *rt2x00dev =
-	    container_of(work, struct rt2x00_dev, link.vco_work.work);
-	struct link *link = &rt2x00dev->link;
-
-	/*
-	 * When the radio is shutting down we should
-	 * immediately cease the VCO calibration.
-	 */
-	if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
-		return;
-
-	rt2x00dev->ops->lib->vco_calibration(rt2x00dev);
-
-	if (test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
-		ieee80211_queue_delayed_work(rt2x00dev->hw,
-					     &link->vco_work,
-					     VCO_INTERVAL);
-}
-
-void rt2x00link_register(struct rt2x00_dev *rt2x00dev)
-{
-	INIT_DELAYED_WORK(&rt2x00dev->link.agc_work, rt2x00link_agc);
-	if (rt2x00_has_cap_vco_recalibration(rt2x00dev))
-		INIT_DELAYED_WORK(&rt2x00dev->link.vco_work, rt2x00link_vcocal);
-	INIT_DELAYED_WORK(&rt2x00dev->link.watchdog_work, rt2x00link_watchdog);
-	INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00link_tuner);
-}