2b08da3fb5
* Reduce goto usage * Mark if-statements which are true on hardware error unlikely() * Cleanup debug messages This makes the code look nicer and be better optimized since the chance of hardware errors should be very small. Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
1217 lines
30 KiB
C
1217 lines
30 KiB
C
/*
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Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
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<http://rt2x00.serialmonkey.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the
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Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/*
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Module: rt2x00lib
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Abstract: rt2x00 generic device routines.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include "rt2x00.h"
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#include "rt2x00lib.h"
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/*
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* Link tuning handlers
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*/
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void rt2x00lib_reset_link_tuner(struct rt2x00_dev *rt2x00dev)
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{
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if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
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return;
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/*
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* Reset link information.
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* Both the currently active vgc level as well as
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* the link tuner counter should be reset. Resetting
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* the counter is important for devices where the
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* device should only perform link tuning during the
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* first minute after being enabled.
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*/
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rt2x00dev->link.count = 0;
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rt2x00dev->link.vgc_level = 0;
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/*
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* Reset the link tuner.
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*/
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rt2x00dev->ops->lib->reset_tuner(rt2x00dev);
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}
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static void rt2x00lib_start_link_tuner(struct rt2x00_dev *rt2x00dev)
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{
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/*
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* Clear all (possibly) pre-existing quality statistics.
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*/
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memset(&rt2x00dev->link.qual, 0, sizeof(rt2x00dev->link.qual));
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/*
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* The RX and TX percentage should start at 50%
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* this will assure we will get at least get some
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* decent value when the link tuner starts.
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* The value will be dropped and overwritten with
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* the correct (measured )value anyway during the
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* first run of the link tuner.
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*/
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rt2x00dev->link.qual.rx_percentage = 50;
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rt2x00dev->link.qual.tx_percentage = 50;
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rt2x00lib_reset_link_tuner(rt2x00dev);
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queue_delayed_work(rt2x00dev->hw->workqueue,
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&rt2x00dev->link.work, LINK_TUNE_INTERVAL);
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}
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static void rt2x00lib_stop_link_tuner(struct rt2x00_dev *rt2x00dev)
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{
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cancel_delayed_work_sync(&rt2x00dev->link.work);
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}
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/*
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* Radio control handlers.
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*/
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int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev)
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{
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int status;
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/*
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* Don't enable the radio twice.
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* And check if the hardware button has been disabled.
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*/
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if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) ||
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test_bit(DEVICE_DISABLED_RADIO_HW, &rt2x00dev->flags))
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return 0;
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/*
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* Initialize all data queues.
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*/
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rt2x00queue_init_rx(rt2x00dev);
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rt2x00queue_init_tx(rt2x00dev);
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/*
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* Enable radio.
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*/
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status =
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rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_ON);
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if (status)
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return status;
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rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_IRQ_ON);
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rt2x00leds_led_radio(rt2x00dev, true);
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rt2x00led_led_activity(rt2x00dev, true);
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__set_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags);
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/*
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* Enable RX.
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*/
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rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON);
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/*
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* Start the TX queues.
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*/
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ieee80211_wake_queues(rt2x00dev->hw);
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return 0;
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}
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void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev)
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{
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if (!__test_and_clear_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
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return;
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/*
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* Stop all scheduled work.
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*/
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if (work_pending(&rt2x00dev->intf_work))
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cancel_work_sync(&rt2x00dev->intf_work);
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if (work_pending(&rt2x00dev->filter_work))
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cancel_work_sync(&rt2x00dev->filter_work);
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/*
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* Stop the TX queues.
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*/
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ieee80211_stop_queues(rt2x00dev->hw);
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/*
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* Disable RX.
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*/
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rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF);
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/*
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* Disable radio.
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*/
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rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF);
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rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_IRQ_OFF);
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rt2x00led_led_activity(rt2x00dev, false);
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rt2x00leds_led_radio(rt2x00dev, false);
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}
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void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, enum dev_state state)
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{
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/*
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* When we are disabling the RX, we should also stop the link tuner.
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*/
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if (state == STATE_RADIO_RX_OFF)
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rt2x00lib_stop_link_tuner(rt2x00dev);
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rt2x00dev->ops->lib->set_device_state(rt2x00dev, state);
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/*
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* When we are enabling the RX, we should also start the link tuner.
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*/
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if (state == STATE_RADIO_RX_ON &&
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(rt2x00dev->intf_ap_count || rt2x00dev->intf_sta_count))
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rt2x00lib_start_link_tuner(rt2x00dev);
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}
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static void rt2x00lib_evaluate_antenna_sample(struct rt2x00_dev *rt2x00dev)
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{
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enum antenna rx = rt2x00dev->link.ant.active.rx;
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enum antenna tx = rt2x00dev->link.ant.active.tx;
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int sample_a =
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rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_A);
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int sample_b =
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rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_B);
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/*
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* We are done sampling. Now we should evaluate the results.
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*/
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rt2x00dev->link.ant.flags &= ~ANTENNA_MODE_SAMPLE;
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/*
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* During the last period we have sampled the RSSI
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* from both antenna's. It now is time to determine
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* which antenna demonstrated the best performance.
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* When we are already on the antenna with the best
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* performance, then there really is nothing for us
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* left to do.
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*/
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if (sample_a == sample_b)
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return;
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if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY)
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rx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B;
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if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)
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tx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B;
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rt2x00lib_config_antenna(rt2x00dev, rx, tx);
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}
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static void rt2x00lib_evaluate_antenna_eval(struct rt2x00_dev *rt2x00dev)
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{
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enum antenna rx = rt2x00dev->link.ant.active.rx;
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enum antenna tx = rt2x00dev->link.ant.active.tx;
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int rssi_curr = rt2x00_get_link_ant_rssi(&rt2x00dev->link);
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int rssi_old = rt2x00_update_ant_rssi(&rt2x00dev->link, rssi_curr);
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/*
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* Legacy driver indicates that we should swap antenna's
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* when the difference in RSSI is greater that 5. This
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* also should be done when the RSSI was actually better
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* then the previous sample.
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* When the difference exceeds the threshold we should
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* sample the rssi from the other antenna to make a valid
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* comparison between the 2 antennas.
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*/
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if (abs(rssi_curr - rssi_old) < 5)
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return;
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rt2x00dev->link.ant.flags |= ANTENNA_MODE_SAMPLE;
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if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY)
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rx = (rx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
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if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)
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tx = (tx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
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rt2x00lib_config_antenna(rt2x00dev, rx, tx);
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}
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static void rt2x00lib_evaluate_antenna(struct rt2x00_dev *rt2x00dev)
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{
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/*
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* Determine if software diversity is enabled for
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* either the TX or RX antenna (or both).
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* Always perform this check since within the link
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* tuner interval the configuration might have changed.
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*/
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rt2x00dev->link.ant.flags &= ~ANTENNA_RX_DIVERSITY;
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rt2x00dev->link.ant.flags &= ~ANTENNA_TX_DIVERSITY;
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if (rt2x00dev->hw->conf.antenna_sel_rx == 0 &&
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rt2x00dev->default_ant.rx == ANTENNA_SW_DIVERSITY)
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rt2x00dev->link.ant.flags |= ANTENNA_RX_DIVERSITY;
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if (rt2x00dev->hw->conf.antenna_sel_tx == 0 &&
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rt2x00dev->default_ant.tx == ANTENNA_SW_DIVERSITY)
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rt2x00dev->link.ant.flags |= ANTENNA_TX_DIVERSITY;
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if (!(rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) &&
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!(rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)) {
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rt2x00dev->link.ant.flags = 0;
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return;
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}
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/*
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* If we have only sampled the data over the last period
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* we should now harvest the data. Otherwise just evaluate
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* the data. The latter should only be performed once
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* every 2 seconds.
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*/
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if (rt2x00dev->link.ant.flags & ANTENNA_MODE_SAMPLE)
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rt2x00lib_evaluate_antenna_sample(rt2x00dev);
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else if (rt2x00dev->link.count & 1)
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rt2x00lib_evaluate_antenna_eval(rt2x00dev);
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}
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static void rt2x00lib_update_link_stats(struct link *link, int rssi)
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{
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int avg_rssi = rssi;
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/*
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* Update global RSSI
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*/
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if (link->qual.avg_rssi)
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avg_rssi = MOVING_AVERAGE(link->qual.avg_rssi, rssi, 8);
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link->qual.avg_rssi = avg_rssi;
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/*
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* Update antenna RSSI
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*/
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if (link->ant.rssi_ant)
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rssi = MOVING_AVERAGE(link->ant.rssi_ant, rssi, 8);
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link->ant.rssi_ant = rssi;
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}
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static void rt2x00lib_precalculate_link_signal(struct link_qual *qual)
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{
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if (qual->rx_failed || qual->rx_success)
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qual->rx_percentage =
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(qual->rx_success * 100) /
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(qual->rx_failed + qual->rx_success);
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else
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qual->rx_percentage = 50;
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if (qual->tx_failed || qual->tx_success)
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qual->tx_percentage =
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(qual->tx_success * 100) /
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(qual->tx_failed + qual->tx_success);
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else
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qual->tx_percentage = 50;
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qual->rx_success = 0;
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qual->rx_failed = 0;
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qual->tx_success = 0;
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qual->tx_failed = 0;
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}
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static int rt2x00lib_calculate_link_signal(struct rt2x00_dev *rt2x00dev,
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int rssi)
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{
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int rssi_percentage = 0;
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int signal;
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/*
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* We need a positive value for the RSSI.
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*/
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if (rssi < 0)
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rssi += rt2x00dev->rssi_offset;
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/*
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* Calculate the different percentages,
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* which will be used for the signal.
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*/
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if (rt2x00dev->rssi_offset)
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rssi_percentage = (rssi * 100) / rt2x00dev->rssi_offset;
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/*
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* Add the individual percentages and use the WEIGHT
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* defines to calculate the current link signal.
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*/
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signal = ((WEIGHT_RSSI * rssi_percentage) +
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(WEIGHT_TX * rt2x00dev->link.qual.tx_percentage) +
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(WEIGHT_RX * rt2x00dev->link.qual.rx_percentage)) / 100;
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return (signal > 100) ? 100 : signal;
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}
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static void rt2x00lib_link_tuner(struct work_struct *work)
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{
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struct rt2x00_dev *rt2x00dev =
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container_of(work, struct rt2x00_dev, link.work.work);
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/*
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* When the radio is shutting down we should
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* immediately cease all link tuning.
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*/
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if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
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return;
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/*
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* Update statistics.
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*/
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rt2x00dev->ops->lib->link_stats(rt2x00dev, &rt2x00dev->link.qual);
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rt2x00dev->low_level_stats.dot11FCSErrorCount +=
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rt2x00dev->link.qual.rx_failed;
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/*
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* Only perform the link tuning when Link tuning
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* has been enabled (This could have been disabled from the EEPROM).
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*/
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if (!test_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags))
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rt2x00dev->ops->lib->link_tuner(rt2x00dev);
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/*
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* Precalculate a portion of the link signal which is
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* in based on the tx/rx success/failure counters.
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*/
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rt2x00lib_precalculate_link_signal(&rt2x00dev->link.qual);
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/*
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* Send a signal to the led to update the led signal strength.
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*/
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rt2x00leds_led_quality(rt2x00dev, rt2x00dev->link.qual.avg_rssi);
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/*
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* Evaluate antenna setup, make this the last step since this could
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* possibly reset some statistics.
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*/
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rt2x00lib_evaluate_antenna(rt2x00dev);
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/*
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* Increase tuner counter, and reschedule the next link tuner run.
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*/
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rt2x00dev->link.count++;
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queue_delayed_work(rt2x00dev->hw->workqueue, &rt2x00dev->link.work,
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LINK_TUNE_INTERVAL);
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}
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static void rt2x00lib_packetfilter_scheduled(struct work_struct *work)
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{
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struct rt2x00_dev *rt2x00dev =
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container_of(work, struct rt2x00_dev, filter_work);
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rt2x00dev->ops->lib->config_filter(rt2x00dev, rt2x00dev->packet_filter);
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}
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static void rt2x00lib_intf_scheduled_iter(void *data, u8 *mac,
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struct ieee80211_vif *vif)
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{
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struct rt2x00_dev *rt2x00dev = data;
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struct rt2x00_intf *intf = vif_to_intf(vif);
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struct sk_buff *skb;
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struct ieee80211_bss_conf conf;
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int delayed_flags;
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/*
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* Copy all data we need during this action under the protection
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* of a spinlock. Otherwise race conditions might occur which results
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* into an invalid configuration.
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*/
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spin_lock(&intf->lock);
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memcpy(&conf, &intf->conf, sizeof(conf));
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delayed_flags = intf->delayed_flags;
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intf->delayed_flags = 0;
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spin_unlock(&intf->lock);
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if (delayed_flags & DELAYED_UPDATE_BEACON) {
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skb = ieee80211_beacon_get(rt2x00dev->hw, vif);
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if (skb &&
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rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw, skb))
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dev_kfree_skb(skb);
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}
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if (delayed_flags & DELAYED_CONFIG_ERP)
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rt2x00lib_config_erp(rt2x00dev, intf, &intf->conf);
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if (delayed_flags & DELAYED_LED_ASSOC)
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rt2x00leds_led_assoc(rt2x00dev, !!rt2x00dev->intf_associated);
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}
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static void rt2x00lib_intf_scheduled(struct work_struct *work)
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{
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struct rt2x00_dev *rt2x00dev =
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container_of(work, struct rt2x00_dev, intf_work);
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|
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/*
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* Iterate over each interface and perform the
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* requested configurations.
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*/
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ieee80211_iterate_active_interfaces(rt2x00dev->hw,
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rt2x00lib_intf_scheduled_iter,
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rt2x00dev);
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}
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|
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/*
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* Interrupt context handlers.
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*/
|
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static void rt2x00lib_beacondone_iter(void *data, u8 *mac,
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struct ieee80211_vif *vif)
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{
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struct rt2x00_intf *intf = vif_to_intf(vif);
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if (vif->type != IEEE80211_IF_TYPE_AP &&
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vif->type != IEEE80211_IF_TYPE_IBSS)
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return;
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spin_lock(&intf->lock);
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intf->delayed_flags |= DELAYED_UPDATE_BEACON;
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spin_unlock(&intf->lock);
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}
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|
|
void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev)
|
|
{
|
|
if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
|
|
return;
|
|
|
|
ieee80211_iterate_active_interfaces_atomic(rt2x00dev->hw,
|
|
rt2x00lib_beacondone_iter,
|
|
rt2x00dev);
|
|
|
|
queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->intf_work);
|
|
}
|
|
EXPORT_SYMBOL_GPL(rt2x00lib_beacondone);
|
|
|
|
void rt2x00lib_txdone(struct queue_entry *entry,
|
|
struct txdone_entry_desc *txdesc)
|
|
{
|
|
struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
|
|
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb);
|
|
|
|
/*
|
|
* Send frame to debugfs immediately, after this call is completed
|
|
* we are going to overwrite the skb->cb array.
|
|
*/
|
|
rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TXDONE, entry->skb);
|
|
|
|
/*
|
|
* Update TX statistics.
|
|
*/
|
|
rt2x00dev->link.qual.tx_success +=
|
|
test_bit(TXDONE_SUCCESS, &txdesc->flags);
|
|
rt2x00dev->link.qual.tx_failed +=
|
|
test_bit(TXDONE_FAILURE, &txdesc->flags);
|
|
|
|
/*
|
|
* Initialize TX status
|
|
*/
|
|
memset(&tx_info->status, 0, sizeof(tx_info->status));
|
|
tx_info->status.ack_signal = 0;
|
|
tx_info->status.excessive_retries =
|
|
test_bit(TXDONE_EXCESSIVE_RETRY, &txdesc->flags);
|
|
tx_info->status.retry_count = txdesc->retry;
|
|
|
|
if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK)) {
|
|
if (test_bit(TXDONE_SUCCESS, &txdesc->flags))
|
|
tx_info->flags |= IEEE80211_TX_STAT_ACK;
|
|
else if (test_bit(TXDONE_FAILURE, &txdesc->flags))
|
|
rt2x00dev->low_level_stats.dot11ACKFailureCount++;
|
|
}
|
|
|
|
if (tx_info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) {
|
|
if (test_bit(TXDONE_SUCCESS, &txdesc->flags))
|
|
rt2x00dev->low_level_stats.dot11RTSSuccessCount++;
|
|
else if (test_bit(TXDONE_FAILURE, &txdesc->flags))
|
|
rt2x00dev->low_level_stats.dot11RTSFailureCount++;
|
|
}
|
|
|
|
/*
|
|
* Only send the status report to mac80211 when TX status was
|
|
* requested by it. If this was a extra frame coming through
|
|
* a mac80211 library call (RTS/CTS) then we should not send the
|
|
* status report back.
|
|
*/
|
|
if (tx_info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
|
|
ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb);
|
|
else
|
|
dev_kfree_skb_irq(entry->skb);
|
|
entry->skb = NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rt2x00lib_txdone);
|
|
|
|
void rt2x00lib_rxdone(struct queue_entry *entry,
|
|
struct rxdone_entry_desc *rxdesc)
|
|
{
|
|
struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
|
|
struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
|
|
struct ieee80211_supported_band *sband;
|
|
struct ieee80211_hdr *hdr;
|
|
const struct rt2x00_rate *rate;
|
|
unsigned int i;
|
|
int idx = -1;
|
|
u16 fc;
|
|
|
|
/*
|
|
* Update RX statistics.
|
|
*/
|
|
sband = &rt2x00dev->bands[rt2x00dev->curr_band];
|
|
for (i = 0; i < sband->n_bitrates; i++) {
|
|
rate = rt2x00_get_rate(sband->bitrates[i].hw_value);
|
|
|
|
if (((rxdesc->dev_flags & RXDONE_SIGNAL_PLCP) &&
|
|
(rate->plcp == rxdesc->signal)) ||
|
|
(!(rxdesc->dev_flags & RXDONE_SIGNAL_PLCP) &&
|
|
(rate->bitrate == rxdesc->signal))) {
|
|
idx = i;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (idx < 0) {
|
|
WARNING(rt2x00dev, "Frame received with unrecognized signal,"
|
|
"signal=0x%.2x, plcp=%d.\n", rxdesc->signal,
|
|
!!(rxdesc->dev_flags & RXDONE_SIGNAL_PLCP));
|
|
idx = 0;
|
|
}
|
|
|
|
/*
|
|
* Only update link status if this is a beacon frame carrying our bssid.
|
|
*/
|
|
hdr = (struct ieee80211_hdr *)entry->skb->data;
|
|
fc = le16_to_cpu(hdr->frame_control);
|
|
if (is_beacon(fc) && (rxdesc->dev_flags & RXDONE_MY_BSS))
|
|
rt2x00lib_update_link_stats(&rt2x00dev->link, rxdesc->rssi);
|
|
|
|
rt2x00dev->link.qual.rx_success++;
|
|
|
|
rx_status->rate_idx = idx;
|
|
rx_status->qual =
|
|
rt2x00lib_calculate_link_signal(rt2x00dev, rxdesc->rssi);
|
|
rx_status->signal = rxdesc->rssi;
|
|
rx_status->flag = rxdesc->flags;
|
|
rx_status->antenna = rt2x00dev->link.ant.active.rx;
|
|
|
|
/*
|
|
* Send frame to mac80211 & debugfs.
|
|
* mac80211 will clean up the skb structure.
|
|
*/
|
|
rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_RXDONE, entry->skb);
|
|
ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb, rx_status);
|
|
entry->skb = NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
|
|
|
|
/*
|
|
* Driver initialization handlers.
|
|
*/
|
|
const struct rt2x00_rate rt2x00_supported_rates[12] = {
|
|
{
|
|
.flags = DEV_RATE_CCK | DEV_RATE_BASIC,
|
|
.bitrate = 10,
|
|
.ratemask = BIT(0),
|
|
.plcp = 0x00,
|
|
},
|
|
{
|
|
.flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
|
|
.bitrate = 20,
|
|
.ratemask = BIT(1),
|
|
.plcp = 0x01,
|
|
},
|
|
{
|
|
.flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
|
|
.bitrate = 55,
|
|
.ratemask = BIT(2),
|
|
.plcp = 0x02,
|
|
},
|
|
{
|
|
.flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
|
|
.bitrate = 110,
|
|
.ratemask = BIT(3),
|
|
.plcp = 0x03,
|
|
},
|
|
{
|
|
.flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
|
|
.bitrate = 60,
|
|
.ratemask = BIT(4),
|
|
.plcp = 0x0b,
|
|
},
|
|
{
|
|
.flags = DEV_RATE_OFDM,
|
|
.bitrate = 90,
|
|
.ratemask = BIT(5),
|
|
.plcp = 0x0f,
|
|
},
|
|
{
|
|
.flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
|
|
.bitrate = 120,
|
|
.ratemask = BIT(6),
|
|
.plcp = 0x0a,
|
|
},
|
|
{
|
|
.flags = DEV_RATE_OFDM,
|
|
.bitrate = 180,
|
|
.ratemask = BIT(7),
|
|
.plcp = 0x0e,
|
|
},
|
|
{
|
|
.flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
|
|
.bitrate = 240,
|
|
.ratemask = BIT(8),
|
|
.plcp = 0x09,
|
|
},
|
|
{
|
|
.flags = DEV_RATE_OFDM,
|
|
.bitrate = 360,
|
|
.ratemask = BIT(9),
|
|
.plcp = 0x0d,
|
|
},
|
|
{
|
|
.flags = DEV_RATE_OFDM,
|
|
.bitrate = 480,
|
|
.ratemask = BIT(10),
|
|
.plcp = 0x08,
|
|
},
|
|
{
|
|
.flags = DEV_RATE_OFDM,
|
|
.bitrate = 540,
|
|
.ratemask = BIT(11),
|
|
.plcp = 0x0c,
|
|
},
|
|
};
|
|
|
|
static void rt2x00lib_channel(struct ieee80211_channel *entry,
|
|
const int channel, const int tx_power,
|
|
const int value)
|
|
{
|
|
entry->center_freq = ieee80211_channel_to_frequency(channel);
|
|
entry->hw_value = value;
|
|
entry->max_power = tx_power;
|
|
entry->max_antenna_gain = 0xff;
|
|
}
|
|
|
|
static void rt2x00lib_rate(struct ieee80211_rate *entry,
|
|
const u16 index, const struct rt2x00_rate *rate)
|
|
{
|
|
entry->flags = 0;
|
|
entry->bitrate = rate->bitrate;
|
|
entry->hw_value = rt2x00_create_rate_hw_value(index, 0);
|
|
entry->hw_value_short = entry->hw_value;
|
|
|
|
if (rate->flags & DEV_RATE_SHORT_PREAMBLE) {
|
|
entry->flags |= IEEE80211_RATE_SHORT_PREAMBLE;
|
|
entry->hw_value_short |= rt2x00_create_rate_hw_value(index, 1);
|
|
}
|
|
}
|
|
|
|
static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev,
|
|
struct hw_mode_spec *spec)
|
|
{
|
|
struct ieee80211_hw *hw = rt2x00dev->hw;
|
|
struct ieee80211_channel *channels;
|
|
struct ieee80211_rate *rates;
|
|
unsigned int num_rates;
|
|
unsigned int i;
|
|
unsigned char tx_power;
|
|
|
|
num_rates = 0;
|
|
if (spec->supported_rates & SUPPORT_RATE_CCK)
|
|
num_rates += 4;
|
|
if (spec->supported_rates & SUPPORT_RATE_OFDM)
|
|
num_rates += 8;
|
|
|
|
channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL);
|
|
if (!channels)
|
|
return -ENOMEM;
|
|
|
|
rates = kzalloc(sizeof(*rates) * num_rates, GFP_KERNEL);
|
|
if (!rates)
|
|
goto exit_free_channels;
|
|
|
|
/*
|
|
* Initialize Rate list.
|
|
*/
|
|
for (i = 0; i < num_rates; i++)
|
|
rt2x00lib_rate(&rates[i], i, rt2x00_get_rate(i));
|
|
|
|
/*
|
|
* Initialize Channel list.
|
|
*/
|
|
for (i = 0; i < spec->num_channels; i++) {
|
|
if (spec->channels[i].channel <= 14) {
|
|
if (spec->tx_power_bg)
|
|
tx_power = spec->tx_power_bg[i];
|
|
else
|
|
tx_power = spec->tx_power_default;
|
|
} else {
|
|
if (spec->tx_power_a)
|
|
tx_power = spec->tx_power_a[i];
|
|
else
|
|
tx_power = spec->tx_power_default;
|
|
}
|
|
|
|
rt2x00lib_channel(&channels[i],
|
|
spec->channels[i].channel, tx_power, i);
|
|
}
|
|
|
|
/*
|
|
* Intitialize 802.11b, 802.11g
|
|
* Rates: CCK, OFDM.
|
|
* Channels: 2.4 GHz
|
|
*/
|
|
if (spec->supported_bands & SUPPORT_BAND_2GHZ) {
|
|
rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_channels = 14;
|
|
rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_bitrates = num_rates;
|
|
rt2x00dev->bands[IEEE80211_BAND_2GHZ].channels = channels;
|
|
rt2x00dev->bands[IEEE80211_BAND_2GHZ].bitrates = rates;
|
|
hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
|
|
&rt2x00dev->bands[IEEE80211_BAND_2GHZ];
|
|
}
|
|
|
|
/*
|
|
* Intitialize 802.11a
|
|
* Rates: OFDM.
|
|
* Channels: OFDM, UNII, HiperLAN2.
|
|
*/
|
|
if (spec->supported_bands & SUPPORT_BAND_5GHZ) {
|
|
rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_channels =
|
|
spec->num_channels - 14;
|
|
rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_bitrates =
|
|
num_rates - 4;
|
|
rt2x00dev->bands[IEEE80211_BAND_5GHZ].channels = &channels[14];
|
|
rt2x00dev->bands[IEEE80211_BAND_5GHZ].bitrates = &rates[4];
|
|
hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
|
|
&rt2x00dev->bands[IEEE80211_BAND_5GHZ];
|
|
}
|
|
|
|
return 0;
|
|
|
|
exit_free_channels:
|
|
kfree(channels);
|
|
ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev)
|
|
{
|
|
if (test_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags))
|
|
ieee80211_unregister_hw(rt2x00dev->hw);
|
|
|
|
if (likely(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ])) {
|
|
kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels);
|
|
kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->bitrates);
|
|
rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL;
|
|
rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL;
|
|
}
|
|
}
|
|
|
|
static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev)
|
|
{
|
|
struct hw_mode_spec *spec = &rt2x00dev->spec;
|
|
int status;
|
|
|
|
/*
|
|
* Initialize HW modes.
|
|
*/
|
|
status = rt2x00lib_probe_hw_modes(rt2x00dev, spec);
|
|
if (status)
|
|
return status;
|
|
|
|
/*
|
|
* Initialize HW fields.
|
|
*/
|
|
rt2x00dev->hw->queues = rt2x00dev->ops->tx_queues;
|
|
|
|
/*
|
|
* Register HW.
|
|
*/
|
|
status = ieee80211_register_hw(rt2x00dev->hw);
|
|
if (status) {
|
|
rt2x00lib_remove_hw(rt2x00dev);
|
|
return status;
|
|
}
|
|
|
|
__set_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Initialization/uninitialization handlers.
|
|
*/
|
|
static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
|
|
{
|
|
if (!__test_and_clear_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
|
|
return;
|
|
|
|
/*
|
|
* Unregister extra components.
|
|
*/
|
|
rt2x00rfkill_unregister(rt2x00dev);
|
|
|
|
/*
|
|
* 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_wake_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");
|