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;
499 int success = !!(txdesc->status == TX_SUCCESS ||
500 txdesc->status == TX_SUCCESS_RETRY);
501 int fail = !!(txdesc->status == TX_FAIL_RETRY ||
502 txdesc->status == TX_FAIL_INVALID ||
503 txdesc->status == TX_FAIL_OTHER);
506 * Update TX statistics.
508 rt2x00dev->link.qual.tx_success += success;
509 rt2x00dev->link.qual.tx_failed += txdesc->retry + fail;
512 * Initialize TX status
515 tx_status.ack_signal = 0;
516 tx_status.excessive_retries = (txdesc->status == TX_FAIL_RETRY);
517 tx_status.retry_count = txdesc->retry;
518 memcpy(&tx_status.control, txdesc->control, sizeof(*txdesc->control));
520 if (!(tx_status.control.flags & IEEE80211_TXCTL_NO_ACK)) {
522 tx_status.flags |= IEEE80211_TX_STATUS_ACK;
524 rt2x00dev->low_level_stats.dot11ACKFailureCount++;
527 if (tx_status.control.flags & IEEE80211_TXCTL_USE_RTS_CTS) {
529 rt2x00dev->low_level_stats.dot11RTSSuccessCount++;
531 rt2x00dev->low_level_stats.dot11RTSFailureCount++;
535 * Send the tx_status to debugfs. Only send the status report
536 * to mac80211 when the frame originated from there. If this was
537 * a extra frame coming through a mac80211 library call (RTS/CTS)
538 * then we should not send the status report back.
539 * If send to mac80211, mac80211 will clean up the skb structure,
540 * otherwise we have to do it ourself.
542 rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TXDONE, entry->skb);
544 skbdesc = get_skb_frame_desc(entry->skb);
545 if (!(skbdesc->flags & FRAME_DESC_DRIVER_GENERATED))
546 ieee80211_tx_status_irqsafe(rt2x00dev->hw,
547 entry->skb, &tx_status);
549 dev_kfree_skb(entry->skb);
552 EXPORT_SYMBOL_GPL(rt2x00lib_txdone);
554 void rt2x00lib_rxdone(struct queue_entry *entry,
555 struct rxdone_entry_desc *rxdesc)
557 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
558 struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
559 struct ieee80211_supported_band *sband;
560 struct ieee80211_hdr *hdr;
561 const struct rt2x00_rate *rate;
567 * Update RX statistics.
569 sband = &rt2x00dev->bands[rt2x00dev->curr_band];
570 for (i = 0; i < sband->n_bitrates; i++) {
571 rate = rt2x00_get_rate(sband->bitrates[i].hw_value);
573 if (((rxdesc->dev_flags & RXDONE_SIGNAL_PLCP) &&
574 (rate->plcp == rxdesc->signal)) ||
575 (!(rxdesc->dev_flags & RXDONE_SIGNAL_PLCP) &&
576 (rate->bitrate == rxdesc->signal))) {
583 WARNING(rt2x00dev, "Frame received with unrecognized signal,"
584 "signal=0x%.2x, plcp=%d.\n", rxdesc->signal,
585 !!(rxdesc->dev_flags & RXDONE_SIGNAL_PLCP));
590 * Only update link status if this is a beacon frame carrying our bssid.
592 hdr = (struct ieee80211_hdr *)entry->skb->data;
593 fc = le16_to_cpu(hdr->frame_control);
594 if (is_beacon(fc) && (rxdesc->dev_flags & RXDONE_MY_BSS))
595 rt2x00lib_update_link_stats(&rt2x00dev->link, rxdesc->rssi);
597 rt2x00dev->link.qual.rx_success++;
599 rx_status->rate_idx = idx;
601 rt2x00lib_calculate_link_signal(rt2x00dev, rxdesc->rssi);
602 rx_status->signal = rxdesc->rssi;
603 rx_status->flag = rxdesc->flags;
604 rx_status->antenna = rt2x00dev->link.ant.active.rx;
607 * Send frame to mac80211 & debugfs.
608 * mac80211 will clean up the skb structure.
610 rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_RXDONE, entry->skb);
611 ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb, rx_status);
614 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
617 * TX descriptor initializer
619 void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev,
621 struct ieee80211_tx_control *control)
623 struct txentry_desc txdesc;
624 struct skb_frame_desc *skbdesc = get_skb_frame_desc(skb);
625 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skbdesc->data;
626 const struct rt2x00_rate *rate;
634 memset(&txdesc, 0, sizeof(txdesc));
636 txdesc.queue = skbdesc->entry->queue->qid;
637 txdesc.cw_min = skbdesc->entry->queue->cw_min;
638 txdesc.cw_max = skbdesc->entry->queue->cw_max;
639 txdesc.aifs = skbdesc->entry->queue->aifs;
642 * Read required fields from ieee80211 header.
644 frame_control = le16_to_cpu(hdr->frame_control);
645 seq_ctrl = le16_to_cpu(hdr->seq_ctrl);
647 tx_rate = control->tx_rate->hw_value;
650 * Check whether this frame is to be acked
652 if (!(control->flags & IEEE80211_TXCTL_NO_ACK))
653 __set_bit(ENTRY_TXD_ACK, &txdesc.flags);
656 * Check if this is a RTS/CTS frame
658 if (is_rts_frame(frame_control) || is_cts_frame(frame_control)) {
659 __set_bit(ENTRY_TXD_BURST, &txdesc.flags);
660 if (is_rts_frame(frame_control)) {
661 __set_bit(ENTRY_TXD_RTS_FRAME, &txdesc.flags);
662 __set_bit(ENTRY_TXD_ACK, &txdesc.flags);
664 __clear_bit(ENTRY_TXD_ACK, &txdesc.flags);
665 if (control->rts_cts_rate)
666 tx_rate = control->rts_cts_rate->hw_value;
669 rate = rt2x00_get_rate(tx_rate);
672 * Check if more fragments are pending
674 if (ieee80211_get_morefrag(hdr)) {
675 __set_bit(ENTRY_TXD_BURST, &txdesc.flags);
676 __set_bit(ENTRY_TXD_MORE_FRAG, &txdesc.flags);
680 * Beacons and probe responses require the tsf timestamp
681 * to be inserted into the frame.
683 if (txdesc.queue == QID_BEACON || is_probe_resp(frame_control))
684 __set_bit(ENTRY_TXD_REQ_TIMESTAMP, &txdesc.flags);
687 * Determine with what IFS priority this frame should be send.
688 * Set ifs to IFS_SIFS when the this is not the first fragment,
689 * or this fragment came after RTS/CTS.
691 if ((seq_ctrl & IEEE80211_SCTL_FRAG) > 0 ||
692 test_bit(ENTRY_TXD_RTS_FRAME, &txdesc.flags))
693 txdesc.ifs = IFS_SIFS;
695 txdesc.ifs = IFS_BACKOFF;
699 * Length calculation depends on OFDM/CCK rate.
701 txdesc.signal = rate->plcp;
702 txdesc.service = 0x04;
704 length = skbdesc->data_len + FCS_LEN;
705 if (rate->flags & DEV_RATE_OFDM) {
706 __set_bit(ENTRY_TXD_OFDM_RATE, &txdesc.flags);
708 txdesc.length_high = (length >> 6) & 0x3f;
709 txdesc.length_low = length & 0x3f;
712 * Convert length to microseconds.
714 residual = get_duration_res(length, rate->bitrate);
715 duration = get_duration(length, rate->bitrate);
721 * Check if we need to set the Length Extension
723 if (rate->bitrate == 110 && residual <= 30)
724 txdesc.service |= 0x80;
727 txdesc.length_high = (duration >> 8) & 0xff;
728 txdesc.length_low = duration & 0xff;
731 * When preamble is enabled we should set the
732 * preamble bit for the signal.
734 if (rt2x00_get_rate_preamble(tx_rate))
735 txdesc.signal |= 0x08;
738 rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, skb, &txdesc, control);
741 * Update queue entry.
743 skbdesc->entry->skb = skb;
746 * The frame has been completely initialized and ready
747 * for sending to the device. The caller will push the
748 * frame to the device, but we are going to push the
749 * frame to debugfs here.
751 rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TX, skb);
753 EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc);
756 * Driver initialization handlers.
758 const struct rt2x00_rate rt2x00_supported_rates[12] = {
760 .flags = DEV_RATE_CCK | DEV_RATE_BASIC,
766 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
772 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
778 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
784 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
790 .flags = DEV_RATE_OFDM,
796 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
802 .flags = DEV_RATE_OFDM,
808 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
814 .flags = DEV_RATE_OFDM,
820 .flags = DEV_RATE_OFDM,
826 .flags = DEV_RATE_OFDM,
833 static void rt2x00lib_channel(struct ieee80211_channel *entry,
834 const int channel, const int tx_power,
837 entry->center_freq = ieee80211_channel_to_frequency(channel);
838 entry->hw_value = value;
839 entry->max_power = tx_power;
840 entry->max_antenna_gain = 0xff;
843 static void rt2x00lib_rate(struct ieee80211_rate *entry,
844 const u16 index, const struct rt2x00_rate *rate)
847 entry->bitrate = rate->bitrate;
848 entry->hw_value = rt2x00_create_rate_hw_value(index, 0);
849 entry->hw_value_short = entry->hw_value;
851 if (rate->flags & DEV_RATE_SHORT_PREAMBLE) {
852 entry->flags |= IEEE80211_RATE_SHORT_PREAMBLE;
853 entry->hw_value_short |= rt2x00_create_rate_hw_value(index, 1);
857 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev,
858 struct hw_mode_spec *spec)
860 struct ieee80211_hw *hw = rt2x00dev->hw;
861 struct ieee80211_channel *channels;
862 struct ieee80211_rate *rates;
863 unsigned int num_rates;
865 unsigned char tx_power;
868 if (spec->supported_rates & SUPPORT_RATE_CCK)
870 if (spec->supported_rates & SUPPORT_RATE_OFDM)
873 channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL);
877 rates = kzalloc(sizeof(*rates) * num_rates, GFP_KERNEL);
879 goto exit_free_channels;
882 * Initialize Rate list.
884 for (i = 0; i < num_rates; i++)
885 rt2x00lib_rate(&rates[i], i, rt2x00_get_rate(i));
888 * Initialize Channel list.
890 for (i = 0; i < spec->num_channels; i++) {
891 if (spec->channels[i].channel <= 14) {
892 if (spec->tx_power_bg)
893 tx_power = spec->tx_power_bg[i];
895 tx_power = spec->tx_power_default;
897 if (spec->tx_power_a)
898 tx_power = spec->tx_power_a[i];
900 tx_power = spec->tx_power_default;
903 rt2x00lib_channel(&channels[i],
904 spec->channels[i].channel, tx_power, i);
908 * Intitialize 802.11b, 802.11g
912 if (spec->supported_bands & SUPPORT_BAND_2GHZ) {
913 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_channels = 14;
914 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_bitrates = num_rates;
915 rt2x00dev->bands[IEEE80211_BAND_2GHZ].channels = channels;
916 rt2x00dev->bands[IEEE80211_BAND_2GHZ].bitrates = rates;
917 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
918 &rt2x00dev->bands[IEEE80211_BAND_2GHZ];
922 * Intitialize 802.11a
924 * Channels: OFDM, UNII, HiperLAN2.
926 if (spec->supported_bands & SUPPORT_BAND_5GHZ) {
927 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_channels =
928 spec->num_channels - 14;
929 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_bitrates =
931 rt2x00dev->bands[IEEE80211_BAND_5GHZ].channels = &channels[14];
932 rt2x00dev->bands[IEEE80211_BAND_5GHZ].bitrates = &rates[4];
933 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
934 &rt2x00dev->bands[IEEE80211_BAND_5GHZ];
941 ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n");
945 static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev)
947 if (test_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags))
948 ieee80211_unregister_hw(rt2x00dev->hw);
950 if (likely(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ])) {
951 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels);
952 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->bitrates);
953 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL;
954 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL;
958 static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev)
960 struct hw_mode_spec *spec = &rt2x00dev->spec;
964 * Initialize HW modes.
966 status = rt2x00lib_probe_hw_modes(rt2x00dev, spec);
973 status = ieee80211_register_hw(rt2x00dev->hw);
975 rt2x00lib_remove_hw(rt2x00dev);
979 __set_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags);
985 * Initialization/uninitialization handlers.
987 static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
989 if (!__test_and_clear_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
993 * Unregister extra components.
995 rt2x00rfkill_unregister(rt2x00dev);
998 * Allow the HW to uninitialize.
1000 rt2x00dev->ops->lib->uninitialize(rt2x00dev);
1003 * Free allocated queue entries.
1005 rt2x00queue_uninitialize(rt2x00dev);
1008 static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)
1012 if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
1016 * Allocate all queue entries.
1018 status = rt2x00queue_initialize(rt2x00dev);
1023 * Initialize the device.
1025 status = rt2x00dev->ops->lib->initialize(rt2x00dev);
1027 rt2x00queue_uninitialize(rt2x00dev);
1031 __set_bit(DEVICE_INITIALIZED, &rt2x00dev->flags);
1034 * Register the extra components.
1036 rt2x00rfkill_register(rt2x00dev);
1041 int rt2x00lib_start(struct rt2x00_dev *rt2x00dev)
1045 if (test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1049 * If this is the first interface which is added,
1050 * we should load the firmware now.
1052 retval = rt2x00lib_load_firmware(rt2x00dev);
1057 * Initialize the device.
1059 retval = rt2x00lib_initialize(rt2x00dev);
1066 retval = rt2x00lib_enable_radio(rt2x00dev);
1068 rt2x00lib_uninitialize(rt2x00dev);
1072 rt2x00dev->intf_ap_count = 0;
1073 rt2x00dev->intf_sta_count = 0;
1074 rt2x00dev->intf_associated = 0;
1076 __set_bit(DEVICE_STARTED, &rt2x00dev->flags);
1081 void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev)
1083 if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1087 * Perhaps we can add something smarter here,
1088 * but for now just disabling the radio should do.
1090 rt2x00lib_disable_radio(rt2x00dev);
1092 rt2x00dev->intf_ap_count = 0;
1093 rt2x00dev->intf_sta_count = 0;
1094 rt2x00dev->intf_associated = 0;
1096 __clear_bit(DEVICE_STARTED, &rt2x00dev->flags);
1100 * driver allocation handlers.
1102 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
1104 int retval = -ENOMEM;
1107 * Make room for rt2x00_intf inside the per-interface
1108 * structure ieee80211_vif.
1110 rt2x00dev->hw->vif_data_size = sizeof(struct rt2x00_intf);
1113 * Let the driver probe the device to detect the capabilities.
1115 retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev);
1117 ERROR(rt2x00dev, "Failed to allocate device.\n");
1122 * Initialize configuration work.
1124 INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled);
1125 INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled);
1126 INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner);
1129 * Allocate queue array.
1131 retval = rt2x00queue_allocate(rt2x00dev);
1136 * Initialize ieee80211 structure.
1138 retval = rt2x00lib_probe_hw(rt2x00dev);
1140 ERROR(rt2x00dev, "Failed to initialize hw.\n");
1145 * Register extra components.
1147 rt2x00leds_register(rt2x00dev);
1148 rt2x00rfkill_allocate(rt2x00dev);
1149 rt2x00debug_register(rt2x00dev);
1151 __set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1156 rt2x00lib_remove_dev(rt2x00dev);
1160 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev);
1162 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
1164 __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1169 rt2x00lib_disable_radio(rt2x00dev);
1172 * Uninitialize device.
1174 rt2x00lib_uninitialize(rt2x00dev);
1177 * Free extra components
1179 rt2x00debug_deregister(rt2x00dev);
1180 rt2x00rfkill_free(rt2x00dev);
1181 rt2x00leds_unregister(rt2x00dev);
1184 * Free ieee80211_hw memory.
1186 rt2x00lib_remove_hw(rt2x00dev);
1189 * Free firmware image.
1191 rt2x00lib_free_firmware(rt2x00dev);
1194 * Free queue structures.
1196 rt2x00queue_free(rt2x00dev);
1198 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev);
1201 * Device state handlers
1204 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state)
1208 NOTICE(rt2x00dev, "Going to sleep.\n");
1209 __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1212 * Only continue if mac80211 has open interfaces.
1214 if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1216 __set_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags);
1221 rt2x00lib_stop(rt2x00dev);
1222 rt2x00lib_uninitialize(rt2x00dev);
1225 * Suspend/disable extra components.
1227 rt2x00leds_suspend(rt2x00dev);
1228 rt2x00rfkill_suspend(rt2x00dev);
1229 rt2x00debug_deregister(rt2x00dev);
1233 * Set device mode to sleep for power management,
1234 * on some hardware this call seems to consistently fail.
1235 * From the specifications it is hard to tell why it fails,
1236 * and if this is a "bad thing".
1237 * Overall it is safe to just ignore the failure and
1238 * continue suspending. The only downside is that the
1239 * device will not be in optimal power save mode, but with
1240 * the radio and the other components already disabled the
1241 * device is as good as disabled.
1243 retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP);
1245 WARNING(rt2x00dev, "Device failed to enter sleep state, "
1246 "continue suspending.\n");
1250 EXPORT_SYMBOL_GPL(rt2x00lib_suspend);
1252 static void rt2x00lib_resume_intf(void *data, u8 *mac,
1253 struct ieee80211_vif *vif)
1255 struct rt2x00_dev *rt2x00dev = data;
1256 struct rt2x00_intf *intf = vif_to_intf(vif);
1258 spin_lock(&intf->lock);
1260 rt2x00lib_config_intf(rt2x00dev, intf,
1261 vif->type, intf->mac, intf->bssid);
1265 * Master or Ad-hoc mode require a new beacon update.
1267 if (vif->type == IEEE80211_IF_TYPE_AP ||
1268 vif->type == IEEE80211_IF_TYPE_IBSS)
1269 intf->delayed_flags |= DELAYED_UPDATE_BEACON;
1271 spin_unlock(&intf->lock);
1274 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
1278 NOTICE(rt2x00dev, "Waking up.\n");
1281 * Restore/enable extra components.
1283 rt2x00debug_register(rt2x00dev);
1284 rt2x00rfkill_resume(rt2x00dev);
1285 rt2x00leds_resume(rt2x00dev);
1288 * Only continue if mac80211 had open interfaces.
1290 if (!__test_and_clear_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags))
1294 * Reinitialize device and all active interfaces.
1296 retval = rt2x00lib_start(rt2x00dev);
1301 * Reconfigure device.
1303 rt2x00lib_config(rt2x00dev, &rt2x00dev->hw->conf, 1);
1304 if (!rt2x00dev->hw->conf.radio_enabled)
1305 rt2x00lib_disable_radio(rt2x00dev);
1308 * Iterator over each active interface to
1309 * reconfigure the hardware.
1311 ieee80211_iterate_active_interfaces(rt2x00dev->hw,
1312 rt2x00lib_resume_intf, rt2x00dev);
1315 * We are ready again to receive requests from mac80211.
1317 __set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1320 * It is possible that during that mac80211 has attempted
1321 * to send frames while we were suspending or resuming.
1322 * In that case we have disabled the TX queue and should
1323 * now enable it again
1325 ieee80211_start_queues(rt2x00dev->hw);
1328 * During interface iteration we might have changed the
1329 * delayed_flags, time to handles the event by calling
1330 * the work handler directly.
1332 rt2x00lib_intf_scheduled(&rt2x00dev->intf_work);
1337 rt2x00lib_disable_radio(rt2x00dev);
1338 rt2x00lib_uninitialize(rt2x00dev);
1339 rt2x00debug_deregister(rt2x00dev);
1343 EXPORT_SYMBOL_GPL(rt2x00lib_resume);
1344 #endif /* CONFIG_PM */
1347 * rt2x00lib module information.
1349 MODULE_AUTHOR(DRV_PROJECT);
1350 MODULE_VERSION(DRV_VERSION);
1351 MODULE_DESCRIPTION("rt2x00 library");
1352 MODULE_LICENSE("GPL");