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"
33 * Link tuning handlers
35 void rt2x00lib_reset_link_tuner(struct rt2x00_dev *rt2x00dev)
37 if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
41 * Reset link information.
42 * Both the currently active vgc level as well as
43 * the link tuner counter should be reset. Resetting
44 * the counter is important for devices where the
45 * device should only perform link tuning during the
46 * first minute after being enabled.
48 rt2x00dev->link.count = 0;
49 rt2x00dev->link.vgc_level = 0;
52 * Reset the link tuner.
54 rt2x00dev->ops->lib->reset_tuner(rt2x00dev);
57 static void rt2x00lib_start_link_tuner(struct rt2x00_dev *rt2x00dev)
60 * Clear all (possibly) pre-existing quality statistics.
62 memset(&rt2x00dev->link.qual, 0, sizeof(rt2x00dev->link.qual));
65 * The RX and TX percentage should start at 50%
66 * this will assure we will get at least get some
67 * decent value when the link tuner starts.
68 * The value will be dropped and overwritten with
69 * the correct (measured )value anyway during the
70 * first run of the link tuner.
72 rt2x00dev->link.qual.rx_percentage = 50;
73 rt2x00dev->link.qual.tx_percentage = 50;
75 rt2x00lib_reset_link_tuner(rt2x00dev);
77 queue_delayed_work(rt2x00dev->hw->workqueue,
78 &rt2x00dev->link.work, LINK_TUNE_INTERVAL);
81 static void rt2x00lib_stop_link_tuner(struct rt2x00_dev *rt2x00dev)
83 cancel_delayed_work_sync(&rt2x00dev->link.work);
87 * Radio control handlers.
89 int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev)
94 * Don't enable the radio twice.
95 * And check if the hardware button has been disabled.
97 if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) ||
98 test_bit(DEVICE_DISABLED_RADIO_HW, &rt2x00dev->flags))
102 * Initialize all data queues.
104 rt2x00queue_init_rx(rt2x00dev);
105 rt2x00queue_init_tx(rt2x00dev);
111 rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_ON);
115 rt2x00leds_led_radio(rt2x00dev, true);
116 rt2x00led_led_activity(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 rt2x00led_led_activity(rt2x00dev, false);
161 rt2x00leds_led_radio(rt2x00dev, false);
164 void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, enum dev_state state)
167 * When we are disabling the RX, we should also stop the link tuner.
169 if (state == STATE_RADIO_RX_OFF)
170 rt2x00lib_stop_link_tuner(rt2x00dev);
172 rt2x00dev->ops->lib->set_device_state(rt2x00dev, state);
175 * When we are enabling the RX, we should also start the link tuner.
177 if (state == STATE_RADIO_RX_ON &&
178 (rt2x00dev->intf_ap_count || rt2x00dev->intf_sta_count))
179 rt2x00lib_start_link_tuner(rt2x00dev);
182 static void rt2x00lib_evaluate_antenna_sample(struct rt2x00_dev *rt2x00dev)
184 enum antenna rx = rt2x00dev->link.ant.active.rx;
185 enum antenna tx = rt2x00dev->link.ant.active.tx;
187 rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_A);
189 rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_B);
192 * We are done sampling. Now we should evaluate the results.
194 rt2x00dev->link.ant.flags &= ~ANTENNA_MODE_SAMPLE;
197 * During the last period we have sampled the RSSI
198 * from both antenna's. It now is time to determine
199 * which antenna demonstrated the best performance.
200 * When we are already on the antenna with the best
201 * performance, then there really is nothing for us
204 if (sample_a == sample_b)
207 if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY)
208 rx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B;
210 if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)
211 tx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B;
213 rt2x00lib_config_antenna(rt2x00dev, rx, tx);
216 static void rt2x00lib_evaluate_antenna_eval(struct rt2x00_dev *rt2x00dev)
218 enum antenna rx = rt2x00dev->link.ant.active.rx;
219 enum antenna tx = rt2x00dev->link.ant.active.tx;
220 int rssi_curr = rt2x00_get_link_ant_rssi(&rt2x00dev->link);
221 int rssi_old = rt2x00_update_ant_rssi(&rt2x00dev->link, rssi_curr);
224 * Legacy driver indicates that we should swap antenna's
225 * when the difference in RSSI is greater that 5. This
226 * also should be done when the RSSI was actually better
227 * then the previous sample.
228 * When the difference exceeds the threshold we should
229 * sample the rssi from the other antenna to make a valid
230 * comparison between the 2 antennas.
232 if (abs(rssi_curr - rssi_old) < 5)
235 rt2x00dev->link.ant.flags |= ANTENNA_MODE_SAMPLE;
237 if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY)
238 rx = (rx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
240 if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)
241 tx = (tx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
243 rt2x00lib_config_antenna(rt2x00dev, rx, tx);
246 static void rt2x00lib_evaluate_antenna(struct rt2x00_dev *rt2x00dev)
249 * Determine if software diversity is enabled for
250 * either the TX or RX antenna (or both).
251 * Always perform this check since within the link
252 * tuner interval the configuration might have changed.
254 rt2x00dev->link.ant.flags &= ~ANTENNA_RX_DIVERSITY;
255 rt2x00dev->link.ant.flags &= ~ANTENNA_TX_DIVERSITY;
257 if (rt2x00dev->hw->conf.antenna_sel_rx == 0 &&
258 rt2x00dev->default_ant.rx == ANTENNA_SW_DIVERSITY)
259 rt2x00dev->link.ant.flags |= ANTENNA_RX_DIVERSITY;
260 if (rt2x00dev->hw->conf.antenna_sel_tx == 0 &&
261 rt2x00dev->default_ant.tx == ANTENNA_SW_DIVERSITY)
262 rt2x00dev->link.ant.flags |= ANTENNA_TX_DIVERSITY;
264 if (!(rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) &&
265 !(rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)) {
266 rt2x00dev->link.ant.flags = 0;
271 * If we have only sampled the data over the last period
272 * we should now harvest the data. Otherwise just evaluate
273 * the data. The latter should only be performed once
276 if (rt2x00dev->link.ant.flags & ANTENNA_MODE_SAMPLE)
277 rt2x00lib_evaluate_antenna_sample(rt2x00dev);
278 else if (rt2x00dev->link.count & 1)
279 rt2x00lib_evaluate_antenna_eval(rt2x00dev);
282 static void rt2x00lib_update_link_stats(struct link *link, int rssi)
289 if (link->qual.avg_rssi)
290 avg_rssi = MOVING_AVERAGE(link->qual.avg_rssi, rssi, 8);
291 link->qual.avg_rssi = avg_rssi;
294 * Update antenna RSSI
296 if (link->ant.rssi_ant)
297 rssi = MOVING_AVERAGE(link->ant.rssi_ant, rssi, 8);
298 link->ant.rssi_ant = rssi;
301 static void rt2x00lib_precalculate_link_signal(struct link_qual *qual)
303 if (qual->rx_failed || qual->rx_success)
304 qual->rx_percentage =
305 (qual->rx_success * 100) /
306 (qual->rx_failed + qual->rx_success);
308 qual->rx_percentage = 50;
310 if (qual->tx_failed || qual->tx_success)
311 qual->tx_percentage =
312 (qual->tx_success * 100) /
313 (qual->tx_failed + qual->tx_success);
315 qual->tx_percentage = 50;
317 qual->rx_success = 0;
319 qual->tx_success = 0;
323 static int rt2x00lib_calculate_link_signal(struct rt2x00_dev *rt2x00dev,
326 int rssi_percentage = 0;
330 * We need a positive value for the RSSI.
333 rssi += rt2x00dev->rssi_offset;
336 * Calculate the different percentages,
337 * which will be used for the signal.
339 if (rt2x00dev->rssi_offset)
340 rssi_percentage = (rssi * 100) / rt2x00dev->rssi_offset;
343 * Add the individual percentages and use the WEIGHT
344 * defines to calculate the current link signal.
346 signal = ((WEIGHT_RSSI * rssi_percentage) +
347 (WEIGHT_TX * rt2x00dev->link.qual.tx_percentage) +
348 (WEIGHT_RX * rt2x00dev->link.qual.rx_percentage)) / 100;
350 return (signal > 100) ? 100 : signal;
353 static void rt2x00lib_link_tuner(struct work_struct *work)
355 struct rt2x00_dev *rt2x00dev =
356 container_of(work, struct rt2x00_dev, link.work.work);
359 * When the radio is shutting down we should
360 * immediately cease all link tuning.
362 if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
368 rt2x00dev->ops->lib->link_stats(rt2x00dev, &rt2x00dev->link.qual);
369 rt2x00dev->low_level_stats.dot11FCSErrorCount +=
370 rt2x00dev->link.qual.rx_failed;
373 * Only perform the link tuning when Link tuning
374 * has been enabled (This could have been disabled from the EEPROM).
376 if (!test_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags))
377 rt2x00dev->ops->lib->link_tuner(rt2x00dev);
380 * Precalculate a portion of the link signal which is
381 * in based on the tx/rx success/failure counters.
383 rt2x00lib_precalculate_link_signal(&rt2x00dev->link.qual);
386 * Send a signal to the led to update the led signal strength.
388 rt2x00leds_led_quality(rt2x00dev, rt2x00dev->link.qual.avg_rssi);
391 * Evaluate antenna setup, make this the last step since this could
392 * possibly reset some statistics.
394 rt2x00lib_evaluate_antenna(rt2x00dev);
397 * Increase tuner counter, and reschedule the next link tuner run.
399 rt2x00dev->link.count++;
400 queue_delayed_work(rt2x00dev->hw->workqueue, &rt2x00dev->link.work,
404 static void rt2x00lib_packetfilter_scheduled(struct work_struct *work)
406 struct rt2x00_dev *rt2x00dev =
407 container_of(work, struct rt2x00_dev, filter_work);
409 rt2x00dev->ops->lib->config_filter(rt2x00dev, rt2x00dev->packet_filter);
412 static void rt2x00lib_intf_scheduled_iter(void *data, u8 *mac,
413 struct ieee80211_vif *vif)
415 struct rt2x00_dev *rt2x00dev = data;
416 struct rt2x00_intf *intf = vif_to_intf(vif);
418 struct ieee80211_tx_control control;
419 struct ieee80211_bss_conf conf;
423 * Copy all data we need during this action under the protection
424 * of a spinlock. Otherwise race conditions might occur which results
425 * into an invalid configuration.
427 spin_lock(&intf->lock);
429 memcpy(&conf, &intf->conf, sizeof(conf));
430 delayed_flags = intf->delayed_flags;
431 intf->delayed_flags = 0;
433 spin_unlock(&intf->lock);
435 if (delayed_flags & DELAYED_UPDATE_BEACON) {
436 skb = ieee80211_beacon_get(rt2x00dev->hw, vif, &control);
437 if (skb && rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw,
442 if (delayed_flags & DELAYED_CONFIG_ERP)
443 rt2x00lib_config_erp(rt2x00dev, intf, &intf->conf);
445 if (delayed_flags & DELAYED_LED_ASSOC)
446 rt2x00leds_led_assoc(rt2x00dev, !!rt2x00dev->intf_associated);
449 static void rt2x00lib_intf_scheduled(struct work_struct *work)
451 struct rt2x00_dev *rt2x00dev =
452 container_of(work, struct rt2x00_dev, intf_work);
455 * Iterate over each interface and perform the
456 * requested configurations.
458 ieee80211_iterate_active_interfaces(rt2x00dev->hw,
459 rt2x00lib_intf_scheduled_iter,
464 * Interrupt context handlers.
466 static void rt2x00lib_beacondone_iter(void *data, u8 *mac,
467 struct ieee80211_vif *vif)
469 struct rt2x00_intf *intf = vif_to_intf(vif);
471 if (vif->type != IEEE80211_IF_TYPE_AP &&
472 vif->type != IEEE80211_IF_TYPE_IBSS)
475 spin_lock(&intf->lock);
476 intf->delayed_flags |= DELAYED_UPDATE_BEACON;
477 spin_unlock(&intf->lock);
480 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev)
482 if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
485 ieee80211_iterate_active_interfaces(rt2x00dev->hw,
486 rt2x00lib_beacondone_iter,
489 queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->intf_work);
491 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone);
493 void rt2x00lib_txdone(struct queue_entry *entry,
494 struct txdone_entry_desc *txdesc)
496 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
497 struct skb_frame_desc *skbdesc;
498 struct ieee80211_tx_status tx_status;
501 * Update TX statistics.
503 rt2x00dev->link.qual.tx_success +=
504 test_bit(TXDONE_SUCCESS, &txdesc->flags);
505 rt2x00dev->link.qual.tx_failed +=
506 txdesc->retry + !!test_bit(TXDONE_FAILURE, &txdesc->flags);
509 * Initialize TX status
512 tx_status.ack_signal = 0;
513 tx_status.excessive_retries =
514 test_bit(TXDONE_EXCESSIVE_RETRY, &txdesc->flags);
515 tx_status.retry_count = txdesc->retry;
516 memcpy(&tx_status.control, txdesc->control, sizeof(*txdesc->control));
518 if (!(tx_status.control.flags & IEEE80211_TXCTL_NO_ACK)) {
519 if (test_bit(TXDONE_SUCCESS, &txdesc->flags))
520 tx_status.flags |= IEEE80211_TX_STATUS_ACK;
521 else if (test_bit(TXDONE_FAILURE, &txdesc->flags))
522 rt2x00dev->low_level_stats.dot11ACKFailureCount++;
525 if (tx_status.control.flags & IEEE80211_TXCTL_USE_RTS_CTS) {
526 if (test_bit(TXDONE_SUCCESS, &txdesc->flags))
527 rt2x00dev->low_level_stats.dot11RTSSuccessCount++;
528 else if (test_bit(TXDONE_FAILURE, &txdesc->flags))
529 rt2x00dev->low_level_stats.dot11RTSFailureCount++;
533 * Send the tx_status to debugfs. Only send the status report
534 * to mac80211 when the frame originated from there. If this was
535 * a extra frame coming through a mac80211 library call (RTS/CTS)
536 * then we should not send the status report back.
537 * If send to mac80211, mac80211 will clean up the skb structure,
538 * otherwise we have to do it ourself.
540 rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TXDONE, entry->skb);
542 skbdesc = get_skb_frame_desc(entry->skb);
543 if (!(skbdesc->flags & FRAME_DESC_DRIVER_GENERATED))
544 ieee80211_tx_status_irqsafe(rt2x00dev->hw,
545 entry->skb, &tx_status);
547 dev_kfree_skb_irq(entry->skb);
550 EXPORT_SYMBOL_GPL(rt2x00lib_txdone);
552 void rt2x00lib_rxdone(struct queue_entry *entry,
553 struct rxdone_entry_desc *rxdesc)
555 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
556 struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
557 struct ieee80211_supported_band *sband;
558 struct ieee80211_hdr *hdr;
559 const struct rt2x00_rate *rate;
565 * Update RX statistics.
567 sband = &rt2x00dev->bands[rt2x00dev->curr_band];
568 for (i = 0; i < sband->n_bitrates; i++) {
569 rate = rt2x00_get_rate(sband->bitrates[i].hw_value);
571 if (((rxdesc->dev_flags & RXDONE_SIGNAL_PLCP) &&
572 (rate->plcp == rxdesc->signal)) ||
573 (!(rxdesc->dev_flags & RXDONE_SIGNAL_PLCP) &&
574 (rate->bitrate == rxdesc->signal))) {
581 WARNING(rt2x00dev, "Frame received with unrecognized signal,"
582 "signal=0x%.2x, plcp=%d.\n", rxdesc->signal,
583 !!(rxdesc->dev_flags & RXDONE_SIGNAL_PLCP));
588 * Only update link status if this is a beacon frame carrying our bssid.
590 hdr = (struct ieee80211_hdr *)entry->skb->data;
591 fc = le16_to_cpu(hdr->frame_control);
592 if (is_beacon(fc) && (rxdesc->dev_flags & RXDONE_MY_BSS))
593 rt2x00lib_update_link_stats(&rt2x00dev->link, rxdesc->rssi);
595 rt2x00dev->link.qual.rx_success++;
597 rx_status->rate_idx = idx;
599 rt2x00lib_calculate_link_signal(rt2x00dev, rxdesc->rssi);
600 rx_status->signal = rxdesc->rssi;
601 rx_status->flag = rxdesc->flags;
602 rx_status->antenna = rt2x00dev->link.ant.active.rx;
605 * Send frame to mac80211 & debugfs.
606 * mac80211 will clean up the skb structure.
608 rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_RXDONE, entry->skb);
609 ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb, rx_status);
612 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
615 * TX descriptor initializer
617 void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev,
619 struct ieee80211_tx_control *control)
621 struct txentry_desc txdesc;
622 struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
623 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skbdesc->data;
624 const struct rt2x00_rate *rate;
632 memset(&txdesc, 0, sizeof(txdesc));
634 txdesc.queue = skbdesc->entry->queue->qid;
635 txdesc.cw_min = skbdesc->entry->queue->cw_min;
636 txdesc.cw_max = skbdesc->entry->queue->cw_max;
637 txdesc.aifs = skbdesc->entry->queue->aifs;
640 * Read required fields from ieee80211 header.
642 frame_control = le16_to_cpu(hdr->frame_control);
643 seq_ctrl = le16_to_cpu(hdr->seq_ctrl);
645 tx_rate = control->tx_rate->hw_value;
648 * Check whether this frame is to be acked
650 if (!(control->flags & IEEE80211_TXCTL_NO_ACK))
651 __set_bit(ENTRY_TXD_ACK, &txdesc.flags);
654 * Check if this is a RTS/CTS frame
656 if (is_rts_frame(frame_control) || is_cts_frame(frame_control)) {
657 __set_bit(ENTRY_TXD_BURST, &txdesc.flags);
658 if (is_rts_frame(frame_control)) {
659 __set_bit(ENTRY_TXD_RTS_FRAME, &txdesc.flags);
660 __set_bit(ENTRY_TXD_ACK, &txdesc.flags);
662 __clear_bit(ENTRY_TXD_ACK, &txdesc.flags);
663 if (control->rts_cts_rate)
664 tx_rate = control->rts_cts_rate->hw_value;
667 rate = rt2x00_get_rate(tx_rate);
670 * Check if more fragments are pending
672 if (ieee80211_get_morefrag(hdr)) {
673 __set_bit(ENTRY_TXD_BURST, &txdesc.flags);
674 __set_bit(ENTRY_TXD_MORE_FRAG, &txdesc.flags);
678 * Beacons and probe responses require the tsf timestamp
679 * to be inserted into the frame.
681 if (txdesc.queue == QID_BEACON || is_probe_resp(frame_control))
682 __set_bit(ENTRY_TXD_REQ_TIMESTAMP, &txdesc.flags);
685 * Determine with what IFS priority this frame should be send.
686 * Set ifs to IFS_SIFS when the this is not the first fragment,
687 * or this fragment came after RTS/CTS.
689 if ((seq_ctrl & IEEE80211_SCTL_FRAG) > 0 ||
690 test_bit(ENTRY_TXD_RTS_FRAME, &txdesc.flags))
691 txdesc.ifs = IFS_SIFS;
693 txdesc.ifs = IFS_BACKOFF;
697 * Length calculation depends on OFDM/CCK rate.
699 txdesc.signal = rate->plcp;
700 txdesc.service = 0x04;
702 length = skbdesc->data_len + FCS_LEN;
703 if (rate->flags & DEV_RATE_OFDM) {
704 __set_bit(ENTRY_TXD_OFDM_RATE, &txdesc.flags);
706 txdesc.length_high = (length >> 6) & 0x3f;
707 txdesc.length_low = length & 0x3f;
710 * Convert length to microseconds.
712 residual = get_duration_res(length, rate->bitrate);
713 duration = get_duration(length, rate->bitrate);
719 * Check if we need to set the Length Extension
721 if (rate->bitrate == 110 && residual <= 30)
722 txdesc.service |= 0x80;
725 txdesc.length_high = (duration >> 8) & 0xff;
726 txdesc.length_low = duration & 0xff;
729 * When preamble is enabled we should set the
730 * preamble bit for the signal.
732 if (rt2x00_get_rate_preamble(tx_rate))
733 txdesc.signal |= 0x08;
736 rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, skb, &txdesc, control);
739 * Update queue entry.
741 skbdesc->entry->skb = skb;
744 * The frame has been completely initialized and ready
745 * for sending to the device. The caller will push the
746 * frame to the device, but we are going to push the
747 * frame to debugfs here.
749 rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TX, skb);
751 EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc);
754 * Driver initialization handlers.
756 const struct rt2x00_rate rt2x00_supported_rates[12] = {
758 .flags = DEV_RATE_CCK | DEV_RATE_BASIC,
764 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
770 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
776 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
782 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
788 .flags = DEV_RATE_OFDM,
794 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
800 .flags = DEV_RATE_OFDM,
806 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
812 .flags = DEV_RATE_OFDM,
818 .flags = DEV_RATE_OFDM,
824 .flags = DEV_RATE_OFDM,
831 static void rt2x00lib_channel(struct ieee80211_channel *entry,
832 const int channel, const int tx_power,
835 entry->center_freq = ieee80211_channel_to_frequency(channel);
836 entry->hw_value = value;
837 entry->max_power = tx_power;
838 entry->max_antenna_gain = 0xff;
841 static void rt2x00lib_rate(struct ieee80211_rate *entry,
842 const u16 index, const struct rt2x00_rate *rate)
845 entry->bitrate = rate->bitrate;
846 entry->hw_value = rt2x00_create_rate_hw_value(index, 0);
847 entry->hw_value_short = entry->hw_value;
849 if (rate->flags & DEV_RATE_SHORT_PREAMBLE) {
850 entry->flags |= IEEE80211_RATE_SHORT_PREAMBLE;
851 entry->hw_value_short |= rt2x00_create_rate_hw_value(index, 1);
855 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev,
856 struct hw_mode_spec *spec)
858 struct ieee80211_hw *hw = rt2x00dev->hw;
859 struct ieee80211_channel *channels;
860 struct ieee80211_rate *rates;
861 unsigned int num_rates;
863 unsigned char tx_power;
866 if (spec->supported_rates & SUPPORT_RATE_CCK)
868 if (spec->supported_rates & SUPPORT_RATE_OFDM)
871 channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL);
875 rates = kzalloc(sizeof(*rates) * num_rates, GFP_KERNEL);
877 goto exit_free_channels;
880 * Initialize Rate list.
882 for (i = 0; i < num_rates; i++)
883 rt2x00lib_rate(&rates[i], i, rt2x00_get_rate(i));
886 * Initialize Channel list.
888 for (i = 0; i < spec->num_channels; i++) {
889 if (spec->channels[i].channel <= 14) {
890 if (spec->tx_power_bg)
891 tx_power = spec->tx_power_bg[i];
893 tx_power = spec->tx_power_default;
895 if (spec->tx_power_a)
896 tx_power = spec->tx_power_a[i];
898 tx_power = spec->tx_power_default;
901 rt2x00lib_channel(&channels[i],
902 spec->channels[i].channel, tx_power, i);
906 * Intitialize 802.11b, 802.11g
910 if (spec->supported_bands & SUPPORT_BAND_2GHZ) {
911 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_channels = 14;
912 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_bitrates = num_rates;
913 rt2x00dev->bands[IEEE80211_BAND_2GHZ].channels = channels;
914 rt2x00dev->bands[IEEE80211_BAND_2GHZ].bitrates = rates;
915 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
916 &rt2x00dev->bands[IEEE80211_BAND_2GHZ];
920 * Intitialize 802.11a
922 * Channels: OFDM, UNII, HiperLAN2.
924 if (spec->supported_bands & SUPPORT_BAND_5GHZ) {
925 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_channels =
926 spec->num_channels - 14;
927 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_bitrates =
929 rt2x00dev->bands[IEEE80211_BAND_5GHZ].channels = &channels[14];
930 rt2x00dev->bands[IEEE80211_BAND_5GHZ].bitrates = &rates[4];
931 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
932 &rt2x00dev->bands[IEEE80211_BAND_5GHZ];
939 ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n");
943 static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev)
945 if (test_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags))
946 ieee80211_unregister_hw(rt2x00dev->hw);
948 if (likely(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ])) {
949 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels);
950 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->bitrates);
951 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL;
952 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL;
956 static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev)
958 struct hw_mode_spec *spec = &rt2x00dev->spec;
962 * Initialize HW modes.
964 status = rt2x00lib_probe_hw_modes(rt2x00dev, spec);
971 status = ieee80211_register_hw(rt2x00dev->hw);
973 rt2x00lib_remove_hw(rt2x00dev);
977 __set_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags);
983 * Initialization/uninitialization handlers.
985 static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
987 if (!__test_and_clear_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
991 * Unregister extra components.
993 rt2x00rfkill_unregister(rt2x00dev);
996 * Allow the HW to uninitialize.
998 rt2x00dev->ops->lib->uninitialize(rt2x00dev);
1001 * Free allocated queue entries.
1003 rt2x00queue_uninitialize(rt2x00dev);
1006 static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)
1010 if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
1014 * Allocate all queue entries.
1016 status = rt2x00queue_initialize(rt2x00dev);
1021 * Initialize the device.
1023 status = rt2x00dev->ops->lib->initialize(rt2x00dev);
1025 rt2x00queue_uninitialize(rt2x00dev);
1029 __set_bit(DEVICE_INITIALIZED, &rt2x00dev->flags);
1032 * Register the extra components.
1034 rt2x00rfkill_register(rt2x00dev);
1039 int rt2x00lib_start(struct rt2x00_dev *rt2x00dev)
1043 if (test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1047 * If this is the first interface which is added,
1048 * we should load the firmware now.
1050 retval = rt2x00lib_load_firmware(rt2x00dev);
1055 * Initialize the device.
1057 retval = rt2x00lib_initialize(rt2x00dev);
1064 retval = rt2x00lib_enable_radio(rt2x00dev);
1066 rt2x00lib_uninitialize(rt2x00dev);
1070 rt2x00dev->intf_ap_count = 0;
1071 rt2x00dev->intf_sta_count = 0;
1072 rt2x00dev->intf_associated = 0;
1074 __set_bit(DEVICE_STARTED, &rt2x00dev->flags);
1079 void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev)
1081 if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1085 * Perhaps we can add something smarter here,
1086 * but for now just disabling the radio should do.
1088 rt2x00lib_disable_radio(rt2x00dev);
1090 rt2x00dev->intf_ap_count = 0;
1091 rt2x00dev->intf_sta_count = 0;
1092 rt2x00dev->intf_associated = 0;
1094 __clear_bit(DEVICE_STARTED, &rt2x00dev->flags);
1098 * driver allocation handlers.
1100 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
1102 int retval = -ENOMEM;
1105 * Make room for rt2x00_intf inside the per-interface
1106 * structure ieee80211_vif.
1108 rt2x00dev->hw->vif_data_size = sizeof(struct rt2x00_intf);
1111 * Let the driver probe the device to detect the capabilities.
1113 retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev);
1115 ERROR(rt2x00dev, "Failed to allocate device.\n");
1120 * Initialize configuration work.
1122 INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled);
1123 INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled);
1124 INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner);
1127 * Allocate queue array.
1129 retval = rt2x00queue_allocate(rt2x00dev);
1134 * Initialize ieee80211 structure.
1136 retval = rt2x00lib_probe_hw(rt2x00dev);
1138 ERROR(rt2x00dev, "Failed to initialize hw.\n");
1143 * Register extra components.
1145 rt2x00leds_register(rt2x00dev);
1146 rt2x00rfkill_allocate(rt2x00dev);
1147 rt2x00debug_register(rt2x00dev);
1149 __set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1154 rt2x00lib_remove_dev(rt2x00dev);
1158 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev);
1160 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
1162 __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1167 rt2x00lib_disable_radio(rt2x00dev);
1170 * Uninitialize device.
1172 rt2x00lib_uninitialize(rt2x00dev);
1175 * Free extra components
1177 rt2x00debug_deregister(rt2x00dev);
1178 rt2x00rfkill_free(rt2x00dev);
1179 rt2x00leds_unregister(rt2x00dev);
1182 * Free ieee80211_hw memory.
1184 rt2x00lib_remove_hw(rt2x00dev);
1187 * Free firmware image.
1189 rt2x00lib_free_firmware(rt2x00dev);
1192 * Free queue structures.
1194 rt2x00queue_free(rt2x00dev);
1196 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev);
1199 * Device state handlers
1202 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state)
1206 NOTICE(rt2x00dev, "Going to sleep.\n");
1207 __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1210 * Only continue if mac80211 has open interfaces.
1212 if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1214 __set_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags);
1219 rt2x00lib_stop(rt2x00dev);
1220 rt2x00lib_uninitialize(rt2x00dev);
1223 * Suspend/disable extra components.
1225 rt2x00leds_suspend(rt2x00dev);
1226 rt2x00rfkill_suspend(rt2x00dev);
1227 rt2x00debug_deregister(rt2x00dev);
1231 * Set device mode to sleep for power management,
1232 * on some hardware this call seems to consistently fail.
1233 * From the specifications it is hard to tell why it fails,
1234 * and if this is a "bad thing".
1235 * Overall it is safe to just ignore the failure and
1236 * continue suspending. The only downside is that the
1237 * device will not be in optimal power save mode, but with
1238 * the radio and the other components already disabled the
1239 * device is as good as disabled.
1241 retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP);
1243 WARNING(rt2x00dev, "Device failed to enter sleep state, "
1244 "continue suspending.\n");
1248 EXPORT_SYMBOL_GPL(rt2x00lib_suspend);
1250 static void rt2x00lib_resume_intf(void *data, u8 *mac,
1251 struct ieee80211_vif *vif)
1253 struct rt2x00_dev *rt2x00dev = data;
1254 struct rt2x00_intf *intf = vif_to_intf(vif);
1256 spin_lock(&intf->lock);
1258 rt2x00lib_config_intf(rt2x00dev, intf,
1259 vif->type, intf->mac, intf->bssid);
1263 * Master or Ad-hoc mode require a new beacon update.
1265 if (vif->type == IEEE80211_IF_TYPE_AP ||
1266 vif->type == IEEE80211_IF_TYPE_IBSS)
1267 intf->delayed_flags |= DELAYED_UPDATE_BEACON;
1269 spin_unlock(&intf->lock);
1272 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
1276 NOTICE(rt2x00dev, "Waking up.\n");
1279 * Restore/enable extra components.
1281 rt2x00debug_register(rt2x00dev);
1282 rt2x00rfkill_resume(rt2x00dev);
1283 rt2x00leds_resume(rt2x00dev);
1286 * Only continue if mac80211 had open interfaces.
1288 if (!__test_and_clear_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags))
1292 * Reinitialize device and all active interfaces.
1294 retval = rt2x00lib_start(rt2x00dev);
1299 * Reconfigure device.
1301 rt2x00lib_config(rt2x00dev, &rt2x00dev->hw->conf, 1);
1302 if (!rt2x00dev->hw->conf.radio_enabled)
1303 rt2x00lib_disable_radio(rt2x00dev);
1306 * Iterator over each active interface to
1307 * reconfigure the hardware.
1309 ieee80211_iterate_active_interfaces(rt2x00dev->hw,
1310 rt2x00lib_resume_intf, rt2x00dev);
1313 * We are ready again to receive requests from mac80211.
1315 __set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1318 * It is possible that during that mac80211 has attempted
1319 * to send frames while we were suspending or resuming.
1320 * In that case we have disabled the TX queue and should
1321 * now enable it again
1323 ieee80211_start_queues(rt2x00dev->hw);
1326 * During interface iteration we might have changed the
1327 * delayed_flags, time to handles the event by calling
1328 * the work handler directly.
1330 rt2x00lib_intf_scheduled(&rt2x00dev->intf_work);
1335 rt2x00lib_disable_radio(rt2x00dev);
1336 rt2x00lib_uninitialize(rt2x00dev);
1337 rt2x00debug_deregister(rt2x00dev);
1341 EXPORT_SYMBOL_GPL(rt2x00lib_resume);
1342 #endif /* CONFIG_PM */
1345 * rt2x00lib module information.
1347 MODULE_AUTHOR(DRV_PROJECT);
1348 MODULE_VERSION(DRV_VERSION);
1349 MODULE_DESCRIPTION("rt2x00 library");
1350 MODULE_LICENSE("GPL");