2 Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
3 <http://rt2x00.serialmonkey.com>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the
17 Free Software Foundation, Inc.,
18 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 Abstract: rt2x00 generic device routines.
26 #include <linux/kernel.h>
27 #include <linux/module.h>
30 #include "rt2x00lib.h"
31 #include "rt2x00dump.h"
34 * Link tuning handlers
36 void rt2x00lib_reset_link_tuner(struct rt2x00_dev *rt2x00dev)
38 if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
42 * Reset link information.
43 * Both the currently active vgc level as well as
44 * the link tuner counter should be reset. Resetting
45 * the counter is important for devices where the
46 * device should only perform link tuning during the
47 * first minute after being enabled.
49 rt2x00dev->link.count = 0;
50 rt2x00dev->link.vgc_level = 0;
53 * Reset the link tuner.
55 rt2x00dev->ops->lib->reset_tuner(rt2x00dev);
58 static void rt2x00lib_start_link_tuner(struct rt2x00_dev *rt2x00dev)
61 * Clear all (possibly) pre-existing quality statistics.
63 memset(&rt2x00dev->link.qual, 0, sizeof(rt2x00dev->link.qual));
66 * The RX and TX percentage should start at 50%
67 * this will assure we will get at least get some
68 * decent value when the link tuner starts.
69 * The value will be dropped and overwritten with
70 * the correct (measured )value anyway during the
71 * first run of the link tuner.
73 rt2x00dev->link.qual.rx_percentage = 50;
74 rt2x00dev->link.qual.tx_percentage = 50;
76 rt2x00lib_reset_link_tuner(rt2x00dev);
78 queue_delayed_work(rt2x00dev->hw->workqueue,
79 &rt2x00dev->link.work, LINK_TUNE_INTERVAL);
82 static void rt2x00lib_stop_link_tuner(struct rt2x00_dev *rt2x00dev)
84 cancel_delayed_work_sync(&rt2x00dev->link.work);
88 * Radio control handlers.
90 int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev)
95 * Don't enable the radio twice.
96 * And check if the hardware button has been disabled.
98 if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) ||
99 test_bit(DEVICE_DISABLED_RADIO_HW, &rt2x00dev->flags))
103 * Initialize all data queues.
105 rt2x00queue_init_rx(rt2x00dev);
106 rt2x00queue_init_tx(rt2x00dev);
112 rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_ON);
116 rt2x00leds_led_radio(rt2x00dev, true);
118 __set_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags);
123 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON);
126 * Start the TX queues.
128 ieee80211_start_queues(rt2x00dev->hw);
133 void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev)
135 if (!__test_and_clear_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
139 * Stop all scheduled work.
141 if (work_pending(&rt2x00dev->intf_work))
142 cancel_work_sync(&rt2x00dev->intf_work);
143 if (work_pending(&rt2x00dev->filter_work))
144 cancel_work_sync(&rt2x00dev->filter_work);
147 * Stop the TX queues.
149 ieee80211_stop_queues(rt2x00dev->hw);
154 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF);
159 rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF);
160 rt2x00leds_led_radio(rt2x00dev, false);
163 void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, enum dev_state state)
166 * When we are disabling the RX, we should also stop the link tuner.
168 if (state == STATE_RADIO_RX_OFF)
169 rt2x00lib_stop_link_tuner(rt2x00dev);
171 rt2x00dev->ops->lib->set_device_state(rt2x00dev, state);
174 * When we are enabling the RX, we should also start the link tuner.
176 if (state == STATE_RADIO_RX_ON &&
177 (rt2x00dev->intf_ap_count || rt2x00dev->intf_sta_count))
178 rt2x00lib_start_link_tuner(rt2x00dev);
181 static void rt2x00lib_evaluate_antenna_sample(struct rt2x00_dev *rt2x00dev)
183 enum antenna rx = rt2x00dev->link.ant.active.rx;
184 enum antenna tx = rt2x00dev->link.ant.active.tx;
186 rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_A);
188 rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_B);
191 * We are done sampling. Now we should evaluate the results.
193 rt2x00dev->link.ant.flags &= ~ANTENNA_MODE_SAMPLE;
196 * During the last period we have sampled the RSSI
197 * from both antenna's. It now is time to determine
198 * which antenna demonstrated the best performance.
199 * When we are already on the antenna with the best
200 * performance, then there really is nothing for us
203 if (sample_a == sample_b)
206 if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY)
207 rx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B;
209 if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)
210 tx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B;
212 rt2x00lib_config_antenna(rt2x00dev, rx, tx);
215 static void rt2x00lib_evaluate_antenna_eval(struct rt2x00_dev *rt2x00dev)
217 enum antenna rx = rt2x00dev->link.ant.active.rx;
218 enum antenna tx = rt2x00dev->link.ant.active.tx;
219 int rssi_curr = rt2x00_get_link_ant_rssi(&rt2x00dev->link);
220 int rssi_old = rt2x00_update_ant_rssi(&rt2x00dev->link, rssi_curr);
223 * Legacy driver indicates that we should swap antenna's
224 * when the difference in RSSI is greater that 5. This
225 * also should be done when the RSSI was actually better
226 * then the previous sample.
227 * When the difference exceeds the threshold we should
228 * sample the rssi from the other antenna to make a valid
229 * comparison between the 2 antennas.
231 if (abs(rssi_curr - rssi_old) < 5)
234 rt2x00dev->link.ant.flags |= ANTENNA_MODE_SAMPLE;
236 if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY)
237 rx = (rx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
239 if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)
240 tx = (tx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
242 rt2x00lib_config_antenna(rt2x00dev, rx, tx);
245 static void rt2x00lib_evaluate_antenna(struct rt2x00_dev *rt2x00dev)
248 * Determine if software diversity is enabled for
249 * either the TX or RX antenna (or both).
250 * Always perform this check since within the link
251 * tuner interval the configuration might have changed.
253 rt2x00dev->link.ant.flags &= ~ANTENNA_RX_DIVERSITY;
254 rt2x00dev->link.ant.flags &= ~ANTENNA_TX_DIVERSITY;
256 if (rt2x00dev->hw->conf.antenna_sel_rx == 0 &&
257 rt2x00dev->default_ant.rx == ANTENNA_SW_DIVERSITY)
258 rt2x00dev->link.ant.flags |= ANTENNA_RX_DIVERSITY;
259 if (rt2x00dev->hw->conf.antenna_sel_tx == 0 &&
260 rt2x00dev->default_ant.tx == ANTENNA_SW_DIVERSITY)
261 rt2x00dev->link.ant.flags |= ANTENNA_TX_DIVERSITY;
263 if (!(rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) &&
264 !(rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)) {
265 rt2x00dev->link.ant.flags = 0;
270 * If we have only sampled the data over the last period
271 * we should now harvest the data. Otherwise just evaluate
272 * the data. The latter should only be performed once
275 if (rt2x00dev->link.ant.flags & ANTENNA_MODE_SAMPLE)
276 rt2x00lib_evaluate_antenna_sample(rt2x00dev);
277 else if (rt2x00dev->link.count & 1)
278 rt2x00lib_evaluate_antenna_eval(rt2x00dev);
281 static void rt2x00lib_update_link_stats(struct link *link, int rssi)
288 if (link->qual.avg_rssi)
289 avg_rssi = MOVING_AVERAGE(link->qual.avg_rssi, rssi, 8);
290 link->qual.avg_rssi = avg_rssi;
293 * Update antenna RSSI
295 if (link->ant.rssi_ant)
296 rssi = MOVING_AVERAGE(link->ant.rssi_ant, rssi, 8);
297 link->ant.rssi_ant = rssi;
300 static void rt2x00lib_precalculate_link_signal(struct link_qual *qual)
302 if (qual->rx_failed || qual->rx_success)
303 qual->rx_percentage =
304 (qual->rx_success * 100) /
305 (qual->rx_failed + qual->rx_success);
307 qual->rx_percentage = 50;
309 if (qual->tx_failed || qual->tx_success)
310 qual->tx_percentage =
311 (qual->tx_success * 100) /
312 (qual->tx_failed + qual->tx_success);
314 qual->tx_percentage = 50;
316 qual->rx_success = 0;
318 qual->tx_success = 0;
322 static int rt2x00lib_calculate_link_signal(struct rt2x00_dev *rt2x00dev,
325 int rssi_percentage = 0;
329 * We need a positive value for the RSSI.
332 rssi += rt2x00dev->rssi_offset;
335 * Calculate the different percentages,
336 * which will be used for the signal.
338 if (rt2x00dev->rssi_offset)
339 rssi_percentage = (rssi * 100) / rt2x00dev->rssi_offset;
342 * Add the individual percentages and use the WEIGHT
343 * defines to calculate the current link signal.
345 signal = ((WEIGHT_RSSI * rssi_percentage) +
346 (WEIGHT_TX * rt2x00dev->link.qual.tx_percentage) +
347 (WEIGHT_RX * rt2x00dev->link.qual.rx_percentage)) / 100;
349 return (signal > 100) ? 100 : signal;
352 static void rt2x00lib_link_tuner(struct work_struct *work)
354 struct rt2x00_dev *rt2x00dev =
355 container_of(work, struct rt2x00_dev, link.work.work);
358 * When the radio is shutting down we should
359 * immediately cease all link tuning.
361 if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
367 rt2x00dev->ops->lib->link_stats(rt2x00dev, &rt2x00dev->link.qual);
368 rt2x00dev->low_level_stats.dot11FCSErrorCount +=
369 rt2x00dev->link.qual.rx_failed;
372 * Only perform the link tuning when Link tuning
373 * has been enabled (This could have been disabled from the EEPROM).
375 if (!test_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags))
376 rt2x00dev->ops->lib->link_tuner(rt2x00dev);
379 * Precalculate a portion of the link signal which is
380 * in based on the tx/rx success/failure counters.
382 rt2x00lib_precalculate_link_signal(&rt2x00dev->link.qual);
385 * Send a signal to the led to update the led signal strength.
387 rt2x00leds_led_quality(rt2x00dev, rt2x00dev->link.qual.avg_rssi);
390 * Evaluate antenna setup, make this the last step since this could
391 * possibly reset some statistics.
393 rt2x00lib_evaluate_antenna(rt2x00dev);
396 * Increase tuner counter, and reschedule the next link tuner run.
398 rt2x00dev->link.count++;
399 queue_delayed_work(rt2x00dev->hw->workqueue, &rt2x00dev->link.work,
403 static void rt2x00lib_packetfilter_scheduled(struct work_struct *work)
405 struct rt2x00_dev *rt2x00dev =
406 container_of(work, struct rt2x00_dev, filter_work);
407 unsigned int filter = rt2x00dev->packet_filter;
410 * Since we had stored the filter inside rt2x00dev->packet_filter,
411 * we should now clear that field. Otherwise the driver will
412 * assume nothing has changed (*total_flags will be compared
413 * to rt2x00dev->packet_filter to determine if any action is required).
415 rt2x00dev->packet_filter = 0;
417 rt2x00dev->ops->hw->configure_filter(rt2x00dev->hw,
418 filter, &filter, 0, NULL);
421 static void rt2x00lib_intf_scheduled_iter(void *data, u8 *mac,
422 struct ieee80211_vif *vif)
424 struct rt2x00_dev *rt2x00dev = data;
425 struct rt2x00_intf *intf = vif_to_intf(vif);
427 struct ieee80211_tx_control control;
428 struct ieee80211_bss_conf conf;
432 * Copy all data we need during this action under the protection
433 * of a spinlock. Otherwise race conditions might occur which results
434 * into an invalid configuration.
436 spin_lock(&intf->lock);
438 memcpy(&conf, &intf->conf, sizeof(conf));
439 delayed_flags = intf->delayed_flags;
440 intf->delayed_flags = 0;
442 spin_unlock(&intf->lock);
444 if (delayed_flags & DELAYED_UPDATE_BEACON) {
445 skb = ieee80211_beacon_get(rt2x00dev->hw, vif, &control);
447 rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw, skb,
453 if (delayed_flags & DELAYED_CONFIG_ERP)
454 rt2x00lib_config_erp(rt2x00dev, intf, &intf->conf);
456 if (delayed_flags & DELAYED_LED_ASSOC)
457 rt2x00leds_led_assoc(rt2x00dev, !!rt2x00dev->intf_associated);
460 static void rt2x00lib_intf_scheduled(struct work_struct *work)
462 struct rt2x00_dev *rt2x00dev =
463 container_of(work, struct rt2x00_dev, intf_work);
466 * Iterate over each interface and perform the
467 * requested configurations.
469 ieee80211_iterate_active_interfaces(rt2x00dev->hw,
470 rt2x00lib_intf_scheduled_iter,
475 * Interrupt context handlers.
477 static void rt2x00lib_beacondone_iter(void *data, u8 *mac,
478 struct ieee80211_vif *vif)
480 struct rt2x00_intf *intf = vif_to_intf(vif);
482 if (vif->type != IEEE80211_IF_TYPE_AP &&
483 vif->type != IEEE80211_IF_TYPE_IBSS)
486 spin_lock(&intf->lock);
487 intf->delayed_flags |= DELAYED_UPDATE_BEACON;
488 spin_unlock(&intf->lock);
491 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev)
493 if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
496 ieee80211_iterate_active_interfaces(rt2x00dev->hw,
497 rt2x00lib_beacondone_iter,
500 queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->intf_work);
502 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone);
504 void rt2x00lib_txdone(struct queue_entry *entry,
505 struct txdone_entry_desc *txdesc)
507 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
508 struct skb_frame_desc *skbdesc;
509 struct ieee80211_tx_status tx_status;
510 int success = !!(txdesc->status == TX_SUCCESS ||
511 txdesc->status == TX_SUCCESS_RETRY);
512 int fail = !!(txdesc->status == TX_FAIL_RETRY ||
513 txdesc->status == TX_FAIL_INVALID ||
514 txdesc->status == TX_FAIL_OTHER);
517 * Update TX statistics.
519 rt2x00dev->link.qual.tx_success += success;
520 rt2x00dev->link.qual.tx_failed += txdesc->retry + fail;
523 * Initialize TX status
526 tx_status.ack_signal = 0;
527 tx_status.excessive_retries = (txdesc->status == TX_FAIL_RETRY);
528 tx_status.retry_count = txdesc->retry;
529 memcpy(&tx_status.control, txdesc->control, sizeof(*txdesc->control));
531 if (!(tx_status.control.flags & IEEE80211_TXCTL_NO_ACK)) {
533 tx_status.flags |= IEEE80211_TX_STATUS_ACK;
535 rt2x00dev->low_level_stats.dot11ACKFailureCount++;
538 tx_status.queue_length = entry->queue->limit;
539 tx_status.queue_number = tx_status.control.queue;
541 if (tx_status.control.flags & IEEE80211_TXCTL_USE_RTS_CTS) {
543 rt2x00dev->low_level_stats.dot11RTSSuccessCount++;
545 rt2x00dev->low_level_stats.dot11RTSFailureCount++;
549 * Send the tx_status to debugfs. Only send the status report
550 * to mac80211 when the frame originated from there. If this was
551 * a extra frame coming through a mac80211 library call (RTS/CTS)
552 * then we should not send the status report back.
553 * If send to mac80211, mac80211 will clean up the skb structure,
554 * otherwise we have to do it ourself.
556 skbdesc = get_skb_frame_desc(entry->skb);
557 skbdesc->frame_type = DUMP_FRAME_TXDONE;
559 rt2x00debug_dump_frame(rt2x00dev, entry->skb);
561 if (!(skbdesc->flags & FRAME_DESC_DRIVER_GENERATED))
562 ieee80211_tx_status_irqsafe(rt2x00dev->hw,
563 entry->skb, &tx_status);
565 dev_kfree_skb(entry->skb);
568 EXPORT_SYMBOL_GPL(rt2x00lib_txdone);
570 void rt2x00lib_rxdone(struct queue_entry *entry,
571 struct rxdone_entry_desc *rxdesc)
573 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
574 struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
575 struct ieee80211_supported_band *sband;
576 struct ieee80211_hdr *hdr;
577 const struct rt2x00_rate *rate;
583 * Update RX statistics.
585 sband = &rt2x00dev->bands[rt2x00dev->curr_band];
586 for (i = 0; i < sband->n_bitrates; i++) {
587 rate = rt2x00_get_rate(sband->bitrates[i].hw_value);
589 if (((rxdesc->dev_flags & RXDONE_SIGNAL_PLCP) &&
590 (rate->plcp == rxdesc->signal)) ||
591 (!(rxdesc->dev_flags & RXDONE_SIGNAL_PLCP) &&
592 (rate->bitrate == rxdesc->signal))) {
599 WARNING(rt2x00dev, "Frame received with unrecognized signal,"
600 "signal=0x%.2x, plcp=%d.\n", rxdesc->signal,
601 !!(rxdesc->dev_flags & RXDONE_SIGNAL_PLCP));
606 * Only update link status if this is a beacon frame carrying our bssid.
608 hdr = (struct ieee80211_hdr *)entry->skb->data;
609 fc = le16_to_cpu(hdr->frame_control);
610 if (is_beacon(fc) && (rxdesc->dev_flags & RXDONE_MY_BSS))
611 rt2x00lib_update_link_stats(&rt2x00dev->link, rxdesc->rssi);
613 rt2x00dev->link.qual.rx_success++;
615 rx_status->rate_idx = idx;
617 rt2x00lib_calculate_link_signal(rt2x00dev, rxdesc->rssi);
618 rx_status->ssi = rxdesc->rssi;
619 rx_status->flag = rxdesc->flags;
620 rx_status->antenna = rt2x00dev->link.ant.active.rx;
623 * Send frame to mac80211 & debugfs.
624 * mac80211 will clean up the skb structure.
626 get_skb_frame_desc(entry->skb)->frame_type = DUMP_FRAME_RXDONE;
627 rt2x00debug_dump_frame(rt2x00dev, entry->skb);
628 ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb, rx_status);
631 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
634 * TX descriptor initializer
636 void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev,
638 struct ieee80211_tx_control *control)
640 struct txentry_desc txdesc;
641 struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
642 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skbdesc->data;
643 const struct rt2x00_rate *rate;
651 memset(&txdesc, 0, sizeof(txdesc));
653 txdesc.queue = skbdesc->entry->queue->qid;
654 txdesc.cw_min = skbdesc->entry->queue->cw_min;
655 txdesc.cw_max = skbdesc->entry->queue->cw_max;
656 txdesc.aifs = skbdesc->entry->queue->aifs;
659 * Read required fields from ieee80211 header.
661 frame_control = le16_to_cpu(hdr->frame_control);
662 seq_ctrl = le16_to_cpu(hdr->seq_ctrl);
664 tx_rate = control->tx_rate->hw_value;
667 * Check whether this frame is to be acked
669 if (!(control->flags & IEEE80211_TXCTL_NO_ACK))
670 __set_bit(ENTRY_TXD_ACK, &txdesc.flags);
673 * Check if this is a RTS/CTS frame
675 if (is_rts_frame(frame_control) || is_cts_frame(frame_control)) {
676 __set_bit(ENTRY_TXD_BURST, &txdesc.flags);
677 if (is_rts_frame(frame_control)) {
678 __set_bit(ENTRY_TXD_RTS_FRAME, &txdesc.flags);
679 __set_bit(ENTRY_TXD_ACK, &txdesc.flags);
681 __clear_bit(ENTRY_TXD_ACK, &txdesc.flags);
682 if (control->rts_cts_rate)
683 tx_rate = control->rts_cts_rate->hw_value;
686 rate = rt2x00_get_rate(tx_rate);
689 * Check if more fragments are pending
691 if (ieee80211_get_morefrag(hdr)) {
692 __set_bit(ENTRY_TXD_BURST, &txdesc.flags);
693 __set_bit(ENTRY_TXD_MORE_FRAG, &txdesc.flags);
697 * Beacons and probe responses require the tsf timestamp
698 * to be inserted into the frame.
700 if (control->queue == RT2X00_BCN_QUEUE_BEACON ||
701 is_probe_resp(frame_control))
702 __set_bit(ENTRY_TXD_REQ_TIMESTAMP, &txdesc.flags);
705 * Determine with what IFS priority this frame should be send.
706 * Set ifs to IFS_SIFS when the this is not the first fragment,
707 * or this fragment came after RTS/CTS.
709 if ((seq_ctrl & IEEE80211_SCTL_FRAG) > 0 ||
710 test_bit(ENTRY_TXD_RTS_FRAME, &txdesc.flags))
711 txdesc.ifs = IFS_SIFS;
713 txdesc.ifs = IFS_BACKOFF;
717 * Length calculation depends on OFDM/CCK rate.
719 txdesc.signal = rate->plcp;
720 txdesc.service = 0x04;
722 length = skbdesc->data_len + FCS_LEN;
723 if (rate->flags & DEV_RATE_OFDM) {
724 __set_bit(ENTRY_TXD_OFDM_RATE, &txdesc.flags);
726 txdesc.length_high = (length >> 6) & 0x3f;
727 txdesc.length_low = length & 0x3f;
730 * Convert length to microseconds.
732 residual = get_duration_res(length, rate->bitrate);
733 duration = get_duration(length, rate->bitrate);
739 * Check if we need to set the Length Extension
741 if (rate->bitrate == 110 && residual <= 30)
742 txdesc.service |= 0x80;
745 txdesc.length_high = (duration >> 8) & 0xff;
746 txdesc.length_low = duration & 0xff;
749 * When preamble is enabled we should set the
750 * preamble bit for the signal.
752 if (rt2x00_get_rate_preamble(tx_rate))
753 txdesc.signal |= 0x08;
756 rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, skb, &txdesc, control);
759 * Update queue entry.
761 skbdesc->entry->skb = skb;
764 * The frame has been completely initialized and ready
765 * for sending to the device. The caller will push the
766 * frame to the device, but we are going to push the
767 * frame to debugfs here.
769 skbdesc->frame_type = DUMP_FRAME_TX;
770 rt2x00debug_dump_frame(rt2x00dev, skb);
772 EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc);
775 * Driver initialization handlers.
777 const struct rt2x00_rate rt2x00_supported_rates[12] = {
779 .flags = DEV_RATE_CCK | DEV_RATE_BASIC,
785 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
791 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
797 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
803 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
809 .flags = DEV_RATE_OFDM,
815 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
821 .flags = DEV_RATE_OFDM,
827 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
833 .flags = DEV_RATE_OFDM,
839 .flags = DEV_RATE_OFDM,
845 .flags = DEV_RATE_OFDM,
852 static void rt2x00lib_channel(struct ieee80211_channel *entry,
853 const int channel, const int tx_power,
856 entry->center_freq = ieee80211_channel_to_frequency(channel);
857 entry->hw_value = value;
858 entry->max_power = tx_power;
859 entry->max_antenna_gain = 0xff;
862 static void rt2x00lib_rate(struct ieee80211_rate *entry,
863 const u16 index, const struct rt2x00_rate *rate)
866 entry->bitrate = rate->bitrate;
867 entry->hw_value = rt2x00_create_rate_hw_value(index, 0);
868 entry->hw_value_short = entry->hw_value;
870 if (rate->flags & DEV_RATE_SHORT_PREAMBLE) {
871 entry->flags |= IEEE80211_RATE_SHORT_PREAMBLE;
872 entry->hw_value_short |= rt2x00_create_rate_hw_value(index, 1);
876 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev,
877 struct hw_mode_spec *spec)
879 struct ieee80211_hw *hw = rt2x00dev->hw;
880 struct ieee80211_channel *channels;
881 struct ieee80211_rate *rates;
882 unsigned int num_rates;
884 unsigned char tx_power;
887 if (spec->supported_rates & SUPPORT_RATE_CCK)
889 if (spec->supported_rates & SUPPORT_RATE_OFDM)
892 channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL);
896 rates = kzalloc(sizeof(*rates) * num_rates, GFP_KERNEL);
898 goto exit_free_channels;
901 * Initialize Rate list.
903 for (i = 0; i < num_rates; i++)
904 rt2x00lib_rate(&rates[i], i, rt2x00_get_rate(i));
907 * Initialize Channel list.
909 for (i = 0; i < spec->num_channels; i++) {
910 if (spec->channels[i].channel <= 14) {
911 if (spec->tx_power_bg)
912 tx_power = spec->tx_power_bg[i];
914 tx_power = spec->tx_power_default;
916 if (spec->tx_power_a)
917 tx_power = spec->tx_power_a[i];
919 tx_power = spec->tx_power_default;
922 rt2x00lib_channel(&channels[i],
923 spec->channels[i].channel, tx_power, i);
927 * Intitialize 802.11b, 802.11g
931 if (spec->supported_bands & SUPPORT_BAND_2GHZ) {
932 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_channels = 14;
933 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_bitrates = num_rates;
934 rt2x00dev->bands[IEEE80211_BAND_2GHZ].channels = channels;
935 rt2x00dev->bands[IEEE80211_BAND_2GHZ].bitrates = rates;
936 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
937 &rt2x00dev->bands[IEEE80211_BAND_2GHZ];
941 * Intitialize 802.11a
943 * Channels: OFDM, UNII, HiperLAN2.
945 if (spec->supported_bands & SUPPORT_BAND_5GHZ) {
946 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_channels =
947 spec->num_channels - 14;
948 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_bitrates =
950 rt2x00dev->bands[IEEE80211_BAND_5GHZ].channels = &channels[14];
951 rt2x00dev->bands[IEEE80211_BAND_5GHZ].bitrates = &rates[4];
952 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
953 &rt2x00dev->bands[IEEE80211_BAND_5GHZ];
960 ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n");
964 static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev)
966 if (test_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags))
967 ieee80211_unregister_hw(rt2x00dev->hw);
969 if (likely(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ])) {
970 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels);
971 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->bitrates);
972 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL;
973 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL;
977 static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev)
979 struct hw_mode_spec *spec = &rt2x00dev->spec;
983 * Initialize HW modes.
985 status = rt2x00lib_probe_hw_modes(rt2x00dev, spec);
992 status = ieee80211_register_hw(rt2x00dev->hw);
994 rt2x00lib_remove_hw(rt2x00dev);
998 __set_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags);
1004 * Initialization/uninitialization handlers.
1006 static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
1008 if (!__test_and_clear_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
1012 * Unregister extra components.
1014 rt2x00rfkill_unregister(rt2x00dev);
1017 * Allow the HW to uninitialize.
1019 rt2x00dev->ops->lib->uninitialize(rt2x00dev);
1022 * Free allocated queue entries.
1024 rt2x00queue_uninitialize(rt2x00dev);
1027 static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)
1031 if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
1035 * Allocate all queue entries.
1037 status = rt2x00queue_initialize(rt2x00dev);
1042 * Initialize the device.
1044 status = rt2x00dev->ops->lib->initialize(rt2x00dev);
1048 __set_bit(DEVICE_INITIALIZED, &rt2x00dev->flags);
1051 * Register the extra components.
1053 rt2x00rfkill_register(rt2x00dev);
1058 rt2x00lib_uninitialize(rt2x00dev);
1063 int rt2x00lib_start(struct rt2x00_dev *rt2x00dev)
1067 if (test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1071 * If this is the first interface which is added,
1072 * we should load the firmware now.
1074 retval = rt2x00lib_load_firmware(rt2x00dev);
1079 * Initialize the device.
1081 retval = rt2x00lib_initialize(rt2x00dev);
1088 retval = rt2x00lib_enable_radio(rt2x00dev);
1090 rt2x00lib_uninitialize(rt2x00dev);
1094 rt2x00dev->intf_ap_count = 0;
1095 rt2x00dev->intf_sta_count = 0;
1096 rt2x00dev->intf_associated = 0;
1098 __set_bit(DEVICE_STARTED, &rt2x00dev->flags);
1103 void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev)
1105 if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1109 * Perhaps we can add something smarter here,
1110 * but for now just disabling the radio should do.
1112 rt2x00lib_disable_radio(rt2x00dev);
1114 rt2x00dev->intf_ap_count = 0;
1115 rt2x00dev->intf_sta_count = 0;
1116 rt2x00dev->intf_associated = 0;
1118 __clear_bit(DEVICE_STARTED, &rt2x00dev->flags);
1122 * driver allocation handlers.
1124 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
1126 int retval = -ENOMEM;
1129 * Make room for rt2x00_intf inside the per-interface
1130 * structure ieee80211_vif.
1132 rt2x00dev->hw->vif_data_size = sizeof(struct rt2x00_intf);
1135 * Let the driver probe the device to detect the capabilities.
1137 retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev);
1139 ERROR(rt2x00dev, "Failed to allocate device.\n");
1144 * Initialize configuration work.
1146 INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled);
1147 INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled);
1148 INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner);
1151 * Allocate queue array.
1153 retval = rt2x00queue_allocate(rt2x00dev);
1158 * Initialize ieee80211 structure.
1160 retval = rt2x00lib_probe_hw(rt2x00dev);
1162 ERROR(rt2x00dev, "Failed to initialize hw.\n");
1167 * Register extra components.
1169 rt2x00leds_register(rt2x00dev);
1170 rt2x00rfkill_allocate(rt2x00dev);
1171 rt2x00debug_register(rt2x00dev);
1173 __set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1178 rt2x00lib_remove_dev(rt2x00dev);
1182 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev);
1184 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
1186 __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1191 rt2x00lib_disable_radio(rt2x00dev);
1194 * Uninitialize device.
1196 rt2x00lib_uninitialize(rt2x00dev);
1199 * Free extra components
1201 rt2x00debug_deregister(rt2x00dev);
1202 rt2x00rfkill_free(rt2x00dev);
1203 rt2x00leds_unregister(rt2x00dev);
1206 * Free ieee80211_hw memory.
1208 rt2x00lib_remove_hw(rt2x00dev);
1211 * Free firmware image.
1213 rt2x00lib_free_firmware(rt2x00dev);
1216 * Free queue structures.
1218 rt2x00queue_free(rt2x00dev);
1220 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev);
1223 * Device state handlers
1226 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state)
1230 NOTICE(rt2x00dev, "Going to sleep.\n");
1231 __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1234 * Only continue if mac80211 has open interfaces.
1236 if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1238 __set_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags);
1243 rt2x00lib_stop(rt2x00dev);
1244 rt2x00lib_uninitialize(rt2x00dev);
1247 * Suspend/disable extra components.
1249 rt2x00leds_suspend(rt2x00dev);
1250 rt2x00rfkill_suspend(rt2x00dev);
1251 rt2x00debug_deregister(rt2x00dev);
1255 * Set device mode to sleep for power management.
1257 retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP);
1263 EXPORT_SYMBOL_GPL(rt2x00lib_suspend);
1265 static void rt2x00lib_resume_intf(void *data, u8 *mac,
1266 struct ieee80211_vif *vif)
1268 struct rt2x00_dev *rt2x00dev = data;
1269 struct rt2x00_intf *intf = vif_to_intf(vif);
1271 spin_lock(&intf->lock);
1273 rt2x00lib_config_intf(rt2x00dev, intf,
1274 vif->type, intf->mac, intf->bssid);
1278 * Master or Ad-hoc mode require a new beacon update.
1280 if (vif->type == IEEE80211_IF_TYPE_AP ||
1281 vif->type == IEEE80211_IF_TYPE_IBSS)
1282 intf->delayed_flags |= DELAYED_UPDATE_BEACON;
1284 spin_unlock(&intf->lock);
1287 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
1291 NOTICE(rt2x00dev, "Waking up.\n");
1294 * Restore/enable extra components.
1296 rt2x00debug_register(rt2x00dev);
1297 rt2x00rfkill_resume(rt2x00dev);
1298 rt2x00leds_resume(rt2x00dev);
1301 * Only continue if mac80211 had open interfaces.
1303 if (!__test_and_clear_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags))
1307 * Reinitialize device and all active interfaces.
1309 retval = rt2x00lib_start(rt2x00dev);
1314 * Reconfigure device.
1316 rt2x00lib_config(rt2x00dev, &rt2x00dev->hw->conf, 1);
1317 if (!rt2x00dev->hw->conf.radio_enabled)
1318 rt2x00lib_disable_radio(rt2x00dev);
1321 * Iterator over each active interface to
1322 * reconfigure the hardware.
1324 ieee80211_iterate_active_interfaces(rt2x00dev->hw,
1325 rt2x00lib_resume_intf, rt2x00dev);
1328 * We are ready again to receive requests from mac80211.
1330 __set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1333 * It is possible that during that mac80211 has attempted
1334 * to send frames while we were suspending or resuming.
1335 * In that case we have disabled the TX queue and should
1336 * now enable it again
1338 ieee80211_start_queues(rt2x00dev->hw);
1341 * During interface iteration we might have changed the
1342 * delayed_flags, time to handles the event by calling
1343 * the work handler directly.
1345 rt2x00lib_intf_scheduled(&rt2x00dev->intf_work);
1350 rt2x00lib_disable_radio(rt2x00dev);
1351 rt2x00lib_uninitialize(rt2x00dev);
1352 rt2x00debug_deregister(rt2x00dev);
1356 EXPORT_SYMBOL_GPL(rt2x00lib_resume);
1357 #endif /* CONFIG_PM */
1360 * rt2x00lib module information.
1362 MODULE_AUTHOR(DRV_PROJECT);
1363 MODULE_VERSION(DRV_VERSION);
1364 MODULE_DESCRIPTION("rt2x00 library");
1365 MODULE_LICENSE("GPL");