1178 lines
27 KiB
C
1178 lines
27 KiB
C
/*
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Copyright (C) 2004 - 2007 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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/*
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* Set enviroment defines for rt2x00.h
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*/
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#define DRV_NAME "rt2x00lib"
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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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* Ring handler.
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*/
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struct data_ring *rt2x00lib_get_ring(struct rt2x00_dev *rt2x00dev,
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const unsigned int queue)
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{
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int beacon = test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags);
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/*
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* Check if we are requesting a reqular TX ring,
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* or if we are requesting a Beacon or Atim ring.
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* For Atim rings, we should check if it is supported.
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*/
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if (queue < rt2x00dev->hw->queues && rt2x00dev->tx)
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return &rt2x00dev->tx[queue];
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if (!rt2x00dev->bcn || !beacon)
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return NULL;
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if (queue == IEEE80211_TX_QUEUE_BEACON)
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return &rt2x00dev->bcn[0];
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else if (queue == IEEE80211_TX_QUEUE_AFTER_BEACON)
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return &rt2x00dev->bcn[1];
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return NULL;
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}
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EXPORT_SYMBOL_GPL(rt2x00lib_get_ring);
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/*
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* Link tuning handlers
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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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rt2x00_clear_link(&rt2x00dev->link);
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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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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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if (delayed_work_pending(&rt2x00dev->link.work))
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cancel_rearming_delayed_work(&rt2x00dev->link.work);
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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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rt2x00lib_stop_link_tuner(rt2x00dev);
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rt2x00lib_start_link_tuner(rt2x00dev);
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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(CONFIG_SUPPORT_HW_BUTTON, &rt2x00dev->flags) &&
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!test_bit(DEVICE_ENABLED_RADIO_HW, &rt2x00dev->flags)))
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return 0;
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/*
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* Enable radio.
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*/
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status = rt2x00dev->ops->lib->set_device_state(rt2x00dev,
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STATE_RADIO_ON);
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if (status)
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return status;
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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, 1);
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/*
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* Start the TX queues.
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*/
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ieee80211_start_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->beacon_work))
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cancel_work_sync(&rt2x00dev->beacon_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, 0);
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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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}
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void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, int enable)
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{
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enum dev_state state = enable ? STATE_RADIO_RX_ON : STATE_RADIO_RX_OFF;
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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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* When we are disabling the RX, we should also stop the link tuner.
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*/
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if (!enable)
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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 (enable && is_interface_present(&rt2x00dev->interface))
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rt2x00lib_start_link_tuner(rt2x00dev);
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}
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static void rt2x00lib_precalculate_link_signal(struct link *link)
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{
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if (link->rx_failed || link->rx_success)
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link->rx_percentage =
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(link->rx_success * 100) /
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(link->rx_failed + link->rx_success);
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else
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link->rx_percentage = 50;
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if (link->tx_failed || link->tx_success)
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link->tx_percentage =
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(link->tx_success * 100) /
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(link->tx_failed + link->tx_success);
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else
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link->tx_percentage = 50;
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link->rx_success = 0;
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link->rx_failed = 0;
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link->tx_success = 0;
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link->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.tx_percentage) +
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(WEIGHT_RX * rt2x00dev->link.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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* Update statistics.
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*/
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rt2x00dev->ops->lib->link_stats(rt2x00dev);
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rt2x00dev->low_level_stats.dot11FCSErrorCount +=
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rt2x00dev->link.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);
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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->hw->configure_filter(rt2x00dev->hw,
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rt2x00dev->interface.filter,
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&rt2x00dev->interface.filter,
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0, NULL);
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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_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, beacon_work);
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struct data_ring *ring =
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rt2x00lib_get_ring(rt2x00dev, IEEE80211_TX_QUEUE_BEACON);
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struct data_entry *entry = rt2x00_get_data_entry(ring);
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struct sk_buff *skb;
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skb = ieee80211_beacon_get(rt2x00dev->hw,
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rt2x00dev->interface.id,
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&entry->tx_status.control);
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if (!skb)
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return;
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rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw, skb,
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&entry->tx_status.control);
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dev_kfree_skb(skb);
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}
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void rt2x00lib_beacondone(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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queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->beacon_work);
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}
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EXPORT_SYMBOL_GPL(rt2x00lib_beacondone);
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void rt2x00lib_txdone(struct data_entry *entry,
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const int status, const int retry)
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{
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struct rt2x00_dev *rt2x00dev = entry->ring->rt2x00dev;
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struct ieee80211_tx_status *tx_status = &entry->tx_status;
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struct ieee80211_low_level_stats *stats = &rt2x00dev->low_level_stats;
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int success = !!(status == TX_SUCCESS || status == TX_SUCCESS_RETRY);
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int fail = !!(status == TX_FAIL_RETRY || status == TX_FAIL_INVALID ||
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status == TX_FAIL_OTHER);
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/*
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* Update TX statistics.
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*/
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tx_status->flags = 0;
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tx_status->ack_signal = 0;
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tx_status->excessive_retries = (status == TX_FAIL_RETRY);
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tx_status->retry_count = retry;
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rt2x00dev->link.tx_success += success;
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rt2x00dev->link.tx_failed += retry + fail;
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if (!(tx_status->control.flags & IEEE80211_TXCTL_NO_ACK)) {
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if (success)
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tx_status->flags |= IEEE80211_TX_STATUS_ACK;
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else
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stats->dot11ACKFailureCount++;
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}
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tx_status->queue_length = entry->ring->stats.limit;
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tx_status->queue_number = tx_status->control.queue;
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if (tx_status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) {
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if (success)
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stats->dot11RTSSuccessCount++;
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else
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stats->dot11RTSFailureCount++;
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}
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/*
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* Send the tx_status to mac80211,
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* that method also cleans up the skb structure.
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*/
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ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb, tx_status);
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entry->skb = NULL;
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}
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EXPORT_SYMBOL_GPL(rt2x00lib_txdone);
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void rt2x00lib_rxdone(struct data_entry *entry, struct sk_buff *skb,
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struct rxdata_entry_desc *desc)
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{
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struct rt2x00_dev *rt2x00dev = entry->ring->rt2x00dev;
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struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
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struct ieee80211_hw_mode *mode;
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struct ieee80211_rate *rate;
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unsigned int i;
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int val = 0;
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/*
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* Update RX statistics.
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*/
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mode = &rt2x00dev->hwmodes[rt2x00dev->curr_hwmode];
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for (i = 0; i < mode->num_rates; i++) {
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rate = &mode->rates[i];
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/*
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* When frame was received with an OFDM bitrate,
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* the signal is the PLCP value. If it was received with
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* a CCK bitrate the signal is the rate in 0.5kbit/s.
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*/
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if (!desc->ofdm)
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val = DEVICE_GET_RATE_FIELD(rate->val, RATE);
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else
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val = DEVICE_GET_RATE_FIELD(rate->val, PLCP);
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if (val == desc->signal) {
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val = rate->val;
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break;
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}
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}
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rt2x00_update_link_rssi(&rt2x00dev->link, desc->rssi);
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rt2x00dev->link.rx_success++;
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rx_status->rate = val;
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rx_status->signal =
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rt2x00lib_calculate_link_signal(rt2x00dev, desc->rssi);
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rx_status->ssi = desc->rssi;
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rx_status->flag = desc->flags;
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/*
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* Send frame to mac80211
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*/
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ieee80211_rx_irqsafe(rt2x00dev->hw, skb, rx_status);
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}
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EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
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/*
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* TX descriptor initializer
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*/
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void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev,
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struct data_desc *txd,
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struct ieee80211_hdr *ieee80211hdr,
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unsigned int length,
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struct ieee80211_tx_control *control)
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{
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struct txdata_entry_desc desc;
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struct data_ring *ring;
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int tx_rate;
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int bitrate;
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int duration;
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int residual;
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u16 frame_control;
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u16 seq_ctrl;
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/*
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* Make sure the descriptor is properly cleared.
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*/
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memset(&desc, 0x00, sizeof(desc));
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/*
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* Get ring pointer, if we fail to obtain the
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* correct ring, then use the first TX ring.
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*/
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ring = rt2x00lib_get_ring(rt2x00dev, control->queue);
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if (!ring)
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ring = rt2x00lib_get_ring(rt2x00dev, IEEE80211_TX_QUEUE_DATA0);
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desc.cw_min = ring->tx_params.cw_min;
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desc.cw_max = ring->tx_params.cw_max;
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desc.aifs = ring->tx_params.aifs;
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/*
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* Identify queue
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*/
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if (control->queue < rt2x00dev->hw->queues)
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desc.queue = control->queue;
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else if (control->queue == IEEE80211_TX_QUEUE_BEACON ||
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control->queue == IEEE80211_TX_QUEUE_AFTER_BEACON)
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desc.queue = QUEUE_MGMT;
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else
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desc.queue = QUEUE_OTHER;
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/*
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* Read required fields from ieee80211 header.
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*/
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frame_control = le16_to_cpu(ieee80211hdr->frame_control);
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seq_ctrl = le16_to_cpu(ieee80211hdr->seq_ctrl);
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tx_rate = control->tx_rate;
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/*
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* Check if this is a RTS/CTS frame
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*/
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if (is_rts_frame(frame_control) || is_cts_frame(frame_control)) {
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__set_bit(ENTRY_TXD_BURST, &desc.flags);
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if (is_rts_frame(frame_control))
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__set_bit(ENTRY_TXD_RTS_FRAME, &desc.flags);
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if (control->rts_cts_rate)
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tx_rate = control->rts_cts_rate;
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}
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/*
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* Check for OFDM
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*/
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if (DEVICE_GET_RATE_FIELD(tx_rate, RATEMASK) & DEV_OFDM_RATEMASK)
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__set_bit(ENTRY_TXD_OFDM_RATE, &desc.flags);
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/*
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* Check if more fragments are pending
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*/
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if (ieee80211_get_morefrag(ieee80211hdr)) {
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__set_bit(ENTRY_TXD_BURST, &desc.flags);
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__set_bit(ENTRY_TXD_MORE_FRAG, &desc.flags);
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}
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/*
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* Beacons and probe responses require the tsf timestamp
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* to be inserted into the frame.
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*/
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if (control->queue == IEEE80211_TX_QUEUE_BEACON ||
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is_probe_resp(frame_control))
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__set_bit(ENTRY_TXD_REQ_TIMESTAMP, &desc.flags);
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/*
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* Determine with what IFS priority this frame should be send.
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* Set ifs to IFS_SIFS when the this is not the first fragment,
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* or this fragment came after RTS/CTS.
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*/
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if ((seq_ctrl & IEEE80211_SCTL_FRAG) > 0 ||
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test_bit(ENTRY_TXD_RTS_FRAME, &desc.flags))
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desc.ifs = IFS_SIFS;
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else
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desc.ifs = IFS_BACKOFF;
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/*
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* PLCP setup
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* Length calculation depends on OFDM/CCK rate.
|
|
*/
|
|
desc.signal = DEVICE_GET_RATE_FIELD(tx_rate, PLCP);
|
|
desc.service = 0x04;
|
|
|
|
if (test_bit(ENTRY_TXD_OFDM_RATE, &desc.flags)) {
|
|
desc.length_high = ((length + FCS_LEN) >> 6) & 0x3f;
|
|
desc.length_low = ((length + FCS_LEN) & 0x3f);
|
|
} else {
|
|
bitrate = DEVICE_GET_RATE_FIELD(tx_rate, RATE);
|
|
|
|
/*
|
|
* Convert length to microseconds.
|
|
*/
|
|
residual = get_duration_res(length + FCS_LEN, bitrate);
|
|
duration = get_duration(length + FCS_LEN, bitrate);
|
|
|
|
if (residual != 0) {
|
|
duration++;
|
|
|
|
/*
|
|
* Check if we need to set the Length Extension
|
|
*/
|
|
if (bitrate == 110 && residual <= 3)
|
|
desc.service |= 0x80;
|
|
}
|
|
|
|
desc.length_high = (duration >> 8) & 0xff;
|
|
desc.length_low = duration & 0xff;
|
|
|
|
/*
|
|
* When preamble is enabled we should set the
|
|
* preamble bit for the signal.
|
|
*/
|
|
if (DEVICE_GET_RATE_FIELD(tx_rate, PREAMBLE))
|
|
desc.signal |= 0x08;
|
|
}
|
|
|
|
rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, txd, &desc,
|
|
ieee80211hdr, length, control);
|
|
}
|
|
EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc);
|
|
|
|
/*
|
|
* Driver initialization handlers.
|
|
*/
|
|
static void rt2x00lib_channel(struct ieee80211_channel *entry,
|
|
const int channel, const int tx_power,
|
|
const int value)
|
|
{
|
|
entry->chan = channel;
|
|
if (channel <= 14)
|
|
entry->freq = 2407 + (5 * channel);
|
|
else
|
|
entry->freq = 5000 + (5 * channel);
|
|
entry->val = value;
|
|
entry->flag =
|
|
IEEE80211_CHAN_W_IBSS |
|
|
IEEE80211_CHAN_W_ACTIVE_SCAN |
|
|
IEEE80211_CHAN_W_SCAN;
|
|
entry->power_level = tx_power;
|
|
entry->antenna_max = 0xff;
|
|
}
|
|
|
|
static void rt2x00lib_rate(struct ieee80211_rate *entry,
|
|
const int rate, const int mask,
|
|
const int plcp, const int flags)
|
|
{
|
|
entry->rate = rate;
|
|
entry->val =
|
|
DEVICE_SET_RATE_FIELD(rate, RATE) |
|
|
DEVICE_SET_RATE_FIELD(mask, RATEMASK) |
|
|
DEVICE_SET_RATE_FIELD(plcp, PLCP);
|
|
entry->flags = flags;
|
|
entry->val2 = entry->val;
|
|
if (entry->flags & IEEE80211_RATE_PREAMBLE2)
|
|
entry->val2 |= DEVICE_SET_RATE_FIELD(1, PREAMBLE);
|
|
entry->min_rssi_ack = 0;
|
|
entry->min_rssi_ack_delta = 0;
|
|
}
|
|
|
|
static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev,
|
|
struct hw_mode_spec *spec)
|
|
{
|
|
struct ieee80211_hw *hw = rt2x00dev->hw;
|
|
struct ieee80211_hw_mode *hwmodes;
|
|
struct ieee80211_channel *channels;
|
|
struct ieee80211_rate *rates;
|
|
unsigned int i;
|
|
unsigned char tx_power;
|
|
|
|
hwmodes = kzalloc(sizeof(*hwmodes) * spec->num_modes, GFP_KERNEL);
|
|
if (!hwmodes)
|
|
goto exit;
|
|
|
|
channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL);
|
|
if (!channels)
|
|
goto exit_free_modes;
|
|
|
|
rates = kzalloc(sizeof(*rates) * spec->num_rates, GFP_KERNEL);
|
|
if (!rates)
|
|
goto exit_free_channels;
|
|
|
|
/*
|
|
* Initialize Rate list.
|
|
*/
|
|
rt2x00lib_rate(&rates[0], 10, DEV_RATEMASK_1MB,
|
|
0x00, IEEE80211_RATE_CCK);
|
|
rt2x00lib_rate(&rates[1], 20, DEV_RATEMASK_2MB,
|
|
0x01, IEEE80211_RATE_CCK_2);
|
|
rt2x00lib_rate(&rates[2], 55, DEV_RATEMASK_5_5MB,
|
|
0x02, IEEE80211_RATE_CCK_2);
|
|
rt2x00lib_rate(&rates[3], 110, DEV_RATEMASK_11MB,
|
|
0x03, IEEE80211_RATE_CCK_2);
|
|
|
|
if (spec->num_rates > 4) {
|
|
rt2x00lib_rate(&rates[4], 60, DEV_RATEMASK_6MB,
|
|
0x0b, IEEE80211_RATE_OFDM);
|
|
rt2x00lib_rate(&rates[5], 90, DEV_RATEMASK_9MB,
|
|
0x0f, IEEE80211_RATE_OFDM);
|
|
rt2x00lib_rate(&rates[6], 120, DEV_RATEMASK_12MB,
|
|
0x0a, IEEE80211_RATE_OFDM);
|
|
rt2x00lib_rate(&rates[7], 180, DEV_RATEMASK_18MB,
|
|
0x0e, IEEE80211_RATE_OFDM);
|
|
rt2x00lib_rate(&rates[8], 240, DEV_RATEMASK_24MB,
|
|
0x09, IEEE80211_RATE_OFDM);
|
|
rt2x00lib_rate(&rates[9], 360, DEV_RATEMASK_36MB,
|
|
0x0d, IEEE80211_RATE_OFDM);
|
|
rt2x00lib_rate(&rates[10], 480, DEV_RATEMASK_48MB,
|
|
0x08, IEEE80211_RATE_OFDM);
|
|
rt2x00lib_rate(&rates[11], 540, DEV_RATEMASK_54MB,
|
|
0x0c, IEEE80211_RATE_OFDM);
|
|
}
|
|
|
|
/*
|
|
* Initialize Channel list.
|
|
*/
|
|
for (i = 0; i < spec->num_channels; i++) {
|
|
if (spec->channels[i].channel <= 14)
|
|
tx_power = spec->tx_power_bg[i];
|
|
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
|
|
* Rates: CCK.
|
|
* Channels: OFDM.
|
|
*/
|
|
if (spec->num_modes > HWMODE_B) {
|
|
hwmodes[HWMODE_B].mode = MODE_IEEE80211B;
|
|
hwmodes[HWMODE_B].num_channels = 14;
|
|
hwmodes[HWMODE_B].num_rates = 4;
|
|
hwmodes[HWMODE_B].channels = channels;
|
|
hwmodes[HWMODE_B].rates = rates;
|
|
}
|
|
|
|
/*
|
|
* Intitialize 802.11g
|
|
* Rates: CCK, OFDM.
|
|
* Channels: OFDM.
|
|
*/
|
|
if (spec->num_modes > HWMODE_G) {
|
|
hwmodes[HWMODE_G].mode = MODE_IEEE80211G;
|
|
hwmodes[HWMODE_G].num_channels = 14;
|
|
hwmodes[HWMODE_G].num_rates = spec->num_rates;
|
|
hwmodes[HWMODE_G].channels = channels;
|
|
hwmodes[HWMODE_G].rates = rates;
|
|
}
|
|
|
|
/*
|
|
* Intitialize 802.11a
|
|
* Rates: OFDM.
|
|
* Channels: OFDM, UNII, HiperLAN2.
|
|
*/
|
|
if (spec->num_modes > HWMODE_A) {
|
|
hwmodes[HWMODE_A].mode = MODE_IEEE80211A;
|
|
hwmodes[HWMODE_A].num_channels = spec->num_channels - 14;
|
|
hwmodes[HWMODE_A].num_rates = spec->num_rates - 4;
|
|
hwmodes[HWMODE_A].channels = &channels[14];
|
|
hwmodes[HWMODE_A].rates = &rates[4];
|
|
}
|
|
|
|
if (spec->num_modes > HWMODE_G &&
|
|
ieee80211_register_hwmode(hw, &hwmodes[HWMODE_G]))
|
|
goto exit_free_rates;
|
|
|
|
if (spec->num_modes > HWMODE_B &&
|
|
ieee80211_register_hwmode(hw, &hwmodes[HWMODE_B]))
|
|
goto exit_free_rates;
|
|
|
|
if (spec->num_modes > HWMODE_A &&
|
|
ieee80211_register_hwmode(hw, &hwmodes[HWMODE_A]))
|
|
goto exit_free_rates;
|
|
|
|
rt2x00dev->hwmodes = hwmodes;
|
|
|
|
return 0;
|
|
|
|
exit_free_rates:
|
|
kfree(rates);
|
|
|
|
exit_free_channels:
|
|
kfree(channels);
|
|
|
|
exit_free_modes:
|
|
kfree(hwmodes);
|
|
|
|
exit:
|
|
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->hwmodes)) {
|
|
kfree(rt2x00dev->hwmodes->channels);
|
|
kfree(rt2x00dev->hwmodes->rates);
|
|
kfree(rt2x00dev->hwmodes);
|
|
rt2x00dev->hwmodes = 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;
|
|
|
|
/*
|
|
* 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 int rt2x00lib_alloc_entries(struct data_ring *ring,
|
|
const u16 max_entries, const u16 data_size,
|
|
const u16 desc_size)
|
|
{
|
|
struct data_entry *entry;
|
|
unsigned int i;
|
|
|
|
ring->stats.limit = max_entries;
|
|
ring->data_size = data_size;
|
|
ring->desc_size = desc_size;
|
|
|
|
/*
|
|
* Allocate all ring entries.
|
|
*/
|
|
entry = kzalloc(ring->stats.limit * sizeof(*entry), GFP_KERNEL);
|
|
if (!entry)
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < ring->stats.limit; i++) {
|
|
entry[i].flags = 0;
|
|
entry[i].ring = ring;
|
|
entry[i].skb = NULL;
|
|
}
|
|
|
|
ring->entry = entry;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int rt2x00lib_alloc_ring_entries(struct rt2x00_dev *rt2x00dev)
|
|
{
|
|
struct data_ring *ring;
|
|
|
|
/*
|
|
* Allocate the RX ring.
|
|
*/
|
|
if (rt2x00lib_alloc_entries(rt2x00dev->rx, RX_ENTRIES, DATA_FRAME_SIZE,
|
|
rt2x00dev->ops->rxd_size))
|
|
return -ENOMEM;
|
|
|
|
/*
|
|
* First allocate the TX rings.
|
|
*/
|
|
txring_for_each(rt2x00dev, ring) {
|
|
if (rt2x00lib_alloc_entries(ring, TX_ENTRIES, DATA_FRAME_SIZE,
|
|
rt2x00dev->ops->txd_size))
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if (!test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags))
|
|
return 0;
|
|
|
|
/*
|
|
* Allocate the BEACON ring.
|
|
*/
|
|
if (rt2x00lib_alloc_entries(&rt2x00dev->bcn[0], BEACON_ENTRIES,
|
|
MGMT_FRAME_SIZE, rt2x00dev->ops->txd_size))
|
|
return -ENOMEM;
|
|
|
|
/*
|
|
* Allocate the Atim ring.
|
|
*/
|
|
if (rt2x00lib_alloc_entries(&rt2x00dev->bcn[1], ATIM_ENTRIES,
|
|
DATA_FRAME_SIZE, rt2x00dev->ops->txd_size))
|
|
return -ENOMEM;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void rt2x00lib_free_ring_entries(struct rt2x00_dev *rt2x00dev)
|
|
{
|
|
struct data_ring *ring;
|
|
|
|
ring_for_each(rt2x00dev, ring) {
|
|
kfree(ring->entry);
|
|
ring->entry = NULL;
|
|
}
|
|
}
|
|
|
|
void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
|
|
{
|
|
if (!__test_and_clear_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
|
|
return;
|
|
|
|
/*
|
|
* Unregister rfkill.
|
|
*/
|
|
rt2x00rfkill_unregister(rt2x00dev);
|
|
|
|
/*
|
|
* Allow the HW to uninitialize.
|
|
*/
|
|
rt2x00dev->ops->lib->uninitialize(rt2x00dev);
|
|
|
|
/*
|
|
* Free allocated ring entries.
|
|
*/
|
|
rt2x00lib_free_ring_entries(rt2x00dev);
|
|
}
|
|
|
|
int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)
|
|
{
|
|
int status;
|
|
|
|
if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
|
|
return 0;
|
|
|
|
/*
|
|
* Allocate all ring entries.
|
|
*/
|
|
status = rt2x00lib_alloc_ring_entries(rt2x00dev);
|
|
if (status) {
|
|
ERROR(rt2x00dev, "Ring entries allocation failed.\n");
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Initialize the device.
|
|
*/
|
|
status = rt2x00dev->ops->lib->initialize(rt2x00dev);
|
|
if (status)
|
|
goto exit;
|
|
|
|
__set_bit(DEVICE_INITIALIZED, &rt2x00dev->flags);
|
|
|
|
/*
|
|
* Register the rfkill handler.
|
|
*/
|
|
status = rt2x00rfkill_register(rt2x00dev);
|
|
if (status)
|
|
goto exit_unitialize;
|
|
|
|
return 0;
|
|
|
|
exit_unitialize:
|
|
rt2x00lib_uninitialize(rt2x00dev);
|
|
|
|
exit:
|
|
rt2x00lib_free_ring_entries(rt2x00dev);
|
|
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* driver allocation handlers.
|
|
*/
|
|
static int rt2x00lib_alloc_rings(struct rt2x00_dev *rt2x00dev)
|
|
{
|
|
struct data_ring *ring;
|
|
|
|
/*
|
|
* We need the following rings:
|
|
* RX: 1
|
|
* TX: hw->queues
|
|
* Beacon: 1 (if required)
|
|
* Atim: 1 (if required)
|
|
*/
|
|
rt2x00dev->data_rings = 1 + rt2x00dev->hw->queues +
|
|
(2 * test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags));
|
|
|
|
ring = kzalloc(rt2x00dev->data_rings * sizeof(*ring), GFP_KERNEL);
|
|
if (!ring) {
|
|
ERROR(rt2x00dev, "Ring allocation failed.\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/*
|
|
* Initialize pointers
|
|
*/
|
|
rt2x00dev->rx = ring;
|
|
rt2x00dev->tx = &rt2x00dev->rx[1];
|
|
if (test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags))
|
|
rt2x00dev->bcn = &rt2x00dev->tx[rt2x00dev->hw->queues];
|
|
|
|
/*
|
|
* Initialize ring parameters.
|
|
* cw_min: 2^5 = 32.
|
|
* cw_max: 2^10 = 1024.
|
|
*/
|
|
ring_for_each(rt2x00dev, ring) {
|
|
ring->rt2x00dev = rt2x00dev;
|
|
ring->tx_params.aifs = 2;
|
|
ring->tx_params.cw_min = 5;
|
|
ring->tx_params.cw_max = 10;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void rt2x00lib_free_rings(struct rt2x00_dev *rt2x00dev)
|
|
{
|
|
kfree(rt2x00dev->rx);
|
|
rt2x00dev->rx = NULL;
|
|
rt2x00dev->tx = NULL;
|
|
rt2x00dev->bcn = NULL;
|
|
}
|
|
|
|
int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
|
|
{
|
|
int retval = -ENOMEM;
|
|
|
|
/*
|
|
* 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->beacon_work, rt2x00lib_beacondone_scheduled);
|
|
INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled);
|
|
INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner);
|
|
|
|
/*
|
|
* Reset current working type.
|
|
*/
|
|
rt2x00dev->interface.type = INVALID_INTERFACE;
|
|
|
|
/*
|
|
* Allocate ring array.
|
|
*/
|
|
retval = rt2x00lib_alloc_rings(rt2x00dev);
|
|
if (retval)
|
|
goto exit;
|
|
|
|
/*
|
|
* Initialize ieee80211 structure.
|
|
*/
|
|
retval = rt2x00lib_probe_hw(rt2x00dev);
|
|
if (retval) {
|
|
ERROR(rt2x00dev, "Failed to initialize hw.\n");
|
|
goto exit;
|
|
}
|
|
|
|
/*
|
|
* Allocatie rfkill.
|
|
*/
|
|
retval = rt2x00rfkill_allocate(rt2x00dev);
|
|
if (retval)
|
|
goto exit;
|
|
|
|
/*
|
|
* Open the debugfs entry.
|
|
*/
|
|
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);
|
|
|
|
/*
|
|
* Close debugfs entry.
|
|
*/
|
|
rt2x00debug_deregister(rt2x00dev);
|
|
|
|
/*
|
|
* Free rfkill
|
|
*/
|
|
rt2x00rfkill_free(rt2x00dev);
|
|
|
|
/*
|
|
* Free ieee80211_hw memory.
|
|
*/
|
|
rt2x00lib_remove_hw(rt2x00dev);
|
|
|
|
/*
|
|
* Free firmware image.
|
|
*/
|
|
rt2x00lib_free_firmware(rt2x00dev);
|
|
|
|
/*
|
|
* Free ring structures.
|
|
*/
|
|
rt2x00lib_free_rings(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;
|
|
|
|
/*
|
|
* Disable radio and unitialize all items
|
|
* that must be recreated on resume.
|
|
*/
|
|
rt2x00lib_disable_radio(rt2x00dev);
|
|
rt2x00lib_uninitialize(rt2x00dev);
|
|
rt2x00debug_deregister(rt2x00dev);
|
|
|
|
exit:
|
|
/*
|
|
* Set device mode to sleep for power management.
|
|
*/
|
|
retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP);
|
|
if (retval)
|
|
return retval;
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rt2x00lib_suspend);
|
|
|
|
int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
|
|
{
|
|
struct interface *intf = &rt2x00dev->interface;
|
|
int retval;
|
|
|
|
NOTICE(rt2x00dev, "Waking up.\n");
|
|
__set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
|
|
|
|
/*
|
|
* Open the debugfs entry.
|
|
*/
|
|
rt2x00debug_register(rt2x00dev);
|
|
|
|
/*
|
|
* Only continue if mac80211 has open interfaces.
|
|
*/
|
|
if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
|
|
return 0;
|
|
|
|
/*
|
|
* Reinitialize device and all active interfaces.
|
|
*/
|
|
retval = rt2x00mac_start(rt2x00dev->hw);
|
|
if (retval)
|
|
goto exit;
|
|
|
|
/*
|
|
* Reconfigure device.
|
|
*/
|
|
rt2x00lib_config(rt2x00dev, &rt2x00dev->hw->conf, 1);
|
|
if (!rt2x00dev->hw->conf.radio_enabled)
|
|
rt2x00lib_disable_radio(rt2x00dev);
|
|
|
|
rt2x00lib_config_mac_addr(rt2x00dev, intf->mac);
|
|
rt2x00lib_config_bssid(rt2x00dev, intf->bssid);
|
|
rt2x00lib_config_type(rt2x00dev, intf->type);
|
|
|
|
/*
|
|
* 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_start_queues(rt2x00dev->hw);
|
|
|
|
/*
|
|
* When in Master or Ad-hoc mode,
|
|
* restart Beacon transmitting by faking a beacondone event.
|
|
*/
|
|
if (intf->type == IEEE80211_IF_TYPE_AP ||
|
|
intf->type == IEEE80211_IF_TYPE_IBSS)
|
|
rt2x00lib_beacondone(rt2x00dev);
|
|
|
|
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");
|