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_STATE_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_STATE_ENABLED_RADIO, &rt2x00dev->flags) ||
98 test_bit(DEVICE_STATE_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 rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_IRQ_ON);
117 rt2x00leds_led_radio(rt2x00dev, true);
118 rt2x00led_led_activity(rt2x00dev, true);
120 set_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags);
125 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON);
128 * Start the TX queues.
130 ieee80211_wake_queues(rt2x00dev->hw);
135 void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev)
137 if (!test_and_clear_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
141 * Stop the TX queues.
143 ieee80211_stop_queues(rt2x00dev->hw);
148 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF);
153 rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF);
154 rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_IRQ_OFF);
155 rt2x00led_led_activity(rt2x00dev, false);
156 rt2x00leds_led_radio(rt2x00dev, false);
159 void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, enum dev_state state)
162 * When we are disabling the RX, we should also stop the link tuner.
164 if (state == STATE_RADIO_RX_OFF)
165 rt2x00lib_stop_link_tuner(rt2x00dev);
167 rt2x00dev->ops->lib->set_device_state(rt2x00dev, state);
170 * When we are enabling the RX, we should also start the link tuner.
172 if (state == STATE_RADIO_RX_ON &&
173 (rt2x00dev->intf_ap_count || rt2x00dev->intf_sta_count))
174 rt2x00lib_start_link_tuner(rt2x00dev);
177 static void rt2x00lib_evaluate_antenna_sample(struct rt2x00_dev *rt2x00dev)
179 enum antenna rx = rt2x00dev->link.ant.active.rx;
180 enum antenna tx = rt2x00dev->link.ant.active.tx;
182 rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_A);
184 rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_B);
187 * We are done sampling. Now we should evaluate the results.
189 rt2x00dev->link.ant.flags &= ~ANTENNA_MODE_SAMPLE;
192 * During the last period we have sampled the RSSI
193 * from both antenna's. It now is time to determine
194 * which antenna demonstrated the best performance.
195 * When we are already on the antenna with the best
196 * performance, then there really is nothing for us
199 if (sample_a == sample_b)
202 if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY)
203 rx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B;
205 if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)
206 tx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B;
208 rt2x00lib_config_antenna(rt2x00dev, rx, tx);
211 static void rt2x00lib_evaluate_antenna_eval(struct rt2x00_dev *rt2x00dev)
213 enum antenna rx = rt2x00dev->link.ant.active.rx;
214 enum antenna tx = rt2x00dev->link.ant.active.tx;
215 int rssi_curr = rt2x00_get_link_ant_rssi(&rt2x00dev->link);
216 int rssi_old = rt2x00_update_ant_rssi(&rt2x00dev->link, rssi_curr);
219 * Legacy driver indicates that we should swap antenna's
220 * when the difference in RSSI is greater that 5. This
221 * also should be done when the RSSI was actually better
222 * then the previous sample.
223 * When the difference exceeds the threshold we should
224 * sample the rssi from the other antenna to make a valid
225 * comparison between the 2 antennas.
227 if (abs(rssi_curr - rssi_old) < 5)
230 rt2x00dev->link.ant.flags |= ANTENNA_MODE_SAMPLE;
232 if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY)
233 rx = (rx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
235 if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)
236 tx = (tx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
238 rt2x00lib_config_antenna(rt2x00dev, rx, tx);
241 static void rt2x00lib_evaluate_antenna(struct rt2x00_dev *rt2x00dev)
244 * Determine if software diversity is enabled for
245 * either the TX or RX antenna (or both).
246 * Always perform this check since within the link
247 * tuner interval the configuration might have changed.
249 rt2x00dev->link.ant.flags &= ~ANTENNA_RX_DIVERSITY;
250 rt2x00dev->link.ant.flags &= ~ANTENNA_TX_DIVERSITY;
252 if (rt2x00dev->default_ant.rx == ANTENNA_SW_DIVERSITY)
253 rt2x00dev->link.ant.flags |= ANTENNA_RX_DIVERSITY;
254 if (rt2x00dev->default_ant.tx == ANTENNA_SW_DIVERSITY)
255 rt2x00dev->link.ant.flags |= ANTENNA_TX_DIVERSITY;
257 if (!(rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) &&
258 !(rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)) {
259 rt2x00dev->link.ant.flags = 0;
264 * If we have only sampled the data over the last period
265 * we should now harvest the data. Otherwise just evaluate
266 * the data. The latter should only be performed once
269 if (rt2x00dev->link.ant.flags & ANTENNA_MODE_SAMPLE)
270 rt2x00lib_evaluate_antenna_sample(rt2x00dev);
271 else if (rt2x00dev->link.count & 1)
272 rt2x00lib_evaluate_antenna_eval(rt2x00dev);
275 static void rt2x00lib_update_link_stats(struct link *link, int rssi)
282 if (link->qual.avg_rssi)
283 avg_rssi = MOVING_AVERAGE(link->qual.avg_rssi, rssi, 8);
284 link->qual.avg_rssi = avg_rssi;
287 * Update antenna RSSI
289 if (link->ant.rssi_ant)
290 rssi = MOVING_AVERAGE(link->ant.rssi_ant, rssi, 8);
291 link->ant.rssi_ant = rssi;
294 static void rt2x00lib_precalculate_link_signal(struct link_qual *qual)
296 if (qual->rx_failed || qual->rx_success)
297 qual->rx_percentage =
298 (qual->rx_success * 100) /
299 (qual->rx_failed + qual->rx_success);
301 qual->rx_percentage = 50;
303 if (qual->tx_failed || qual->tx_success)
304 qual->tx_percentage =
305 (qual->tx_success * 100) /
306 (qual->tx_failed + qual->tx_success);
308 qual->tx_percentage = 50;
310 qual->rx_success = 0;
312 qual->tx_success = 0;
316 static int rt2x00lib_calculate_link_signal(struct rt2x00_dev *rt2x00dev,
319 int rssi_percentage = 0;
323 * We need a positive value for the RSSI.
326 rssi += rt2x00dev->rssi_offset;
329 * Calculate the different percentages,
330 * which will be used for the signal.
332 if (rt2x00dev->rssi_offset)
333 rssi_percentage = (rssi * 100) / rt2x00dev->rssi_offset;
336 * Add the individual percentages and use the WEIGHT
337 * defines to calculate the current link signal.
339 signal = ((WEIGHT_RSSI * rssi_percentage) +
340 (WEIGHT_TX * rt2x00dev->link.qual.tx_percentage) +
341 (WEIGHT_RX * rt2x00dev->link.qual.rx_percentage)) / 100;
343 return (signal > 100) ? 100 : signal;
346 static void rt2x00lib_link_tuner(struct work_struct *work)
348 struct rt2x00_dev *rt2x00dev =
349 container_of(work, struct rt2x00_dev, link.work.work);
352 * When the radio is shutting down we should
353 * immediately cease all link tuning.
355 if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
361 rt2x00dev->ops->lib->link_stats(rt2x00dev, &rt2x00dev->link.qual);
362 rt2x00dev->low_level_stats.dot11FCSErrorCount +=
363 rt2x00dev->link.qual.rx_failed;
366 * Only perform the link tuning when Link tuning
367 * has been enabled (This could have been disabled from the EEPROM).
369 if (!test_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags))
370 rt2x00dev->ops->lib->link_tuner(rt2x00dev);
373 * Precalculate a portion of the link signal which is
374 * in based on the tx/rx success/failure counters.
376 rt2x00lib_precalculate_link_signal(&rt2x00dev->link.qual);
379 * Send a signal to the led to update the led signal strength.
381 rt2x00leds_led_quality(rt2x00dev, rt2x00dev->link.qual.avg_rssi);
384 * Evaluate antenna setup, make this the last step since this could
385 * possibly reset some statistics.
387 rt2x00lib_evaluate_antenna(rt2x00dev);
390 * Increase tuner counter, and reschedule the next link tuner run.
392 rt2x00dev->link.count++;
393 queue_delayed_work(rt2x00dev->hw->workqueue,
394 &rt2x00dev->link.work, LINK_TUNE_INTERVAL);
397 static void rt2x00lib_packetfilter_scheduled(struct work_struct *work)
399 struct rt2x00_dev *rt2x00dev =
400 container_of(work, struct rt2x00_dev, filter_work);
402 rt2x00dev->ops->lib->config_filter(rt2x00dev, rt2x00dev->packet_filter);
405 static void rt2x00lib_intf_scheduled_iter(void *data, u8 *mac,
406 struct ieee80211_vif *vif)
408 struct rt2x00_dev *rt2x00dev = data;
409 struct rt2x00_intf *intf = vif_to_intf(vif);
410 struct ieee80211_bss_conf conf;
414 * Copy all data we need during this action under the protection
415 * of a spinlock. Otherwise race conditions might occur which results
416 * into an invalid configuration.
418 spin_lock(&intf->lock);
420 memcpy(&conf, &vif->bss_conf, sizeof(conf));
421 delayed_flags = intf->delayed_flags;
422 intf->delayed_flags = 0;
424 spin_unlock(&intf->lock);
427 * It is possible the radio was disabled while the work had been
428 * scheduled. If that happens we should return here immediately,
429 * note that in the spinlock protected area above the delayed_flags
430 * have been cleared correctly.
432 if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
435 if (delayed_flags & DELAYED_UPDATE_BEACON)
436 rt2x00queue_update_beacon(rt2x00dev, vif);
438 if (delayed_flags & DELAYED_CONFIG_ERP)
439 rt2x00lib_config_erp(rt2x00dev, intf, &conf);
441 if (delayed_flags & DELAYED_LED_ASSOC)
442 rt2x00leds_led_assoc(rt2x00dev, !!rt2x00dev->intf_associated);
445 static void rt2x00lib_intf_scheduled(struct work_struct *work)
447 struct rt2x00_dev *rt2x00dev =
448 container_of(work, struct rt2x00_dev, intf_work);
451 * Iterate over each interface and perform the
452 * requested configurations.
454 ieee80211_iterate_active_interfaces(rt2x00dev->hw,
455 rt2x00lib_intf_scheduled_iter,
460 * Interrupt context handlers.
462 static void rt2x00lib_beacondone_iter(void *data, u8 *mac,
463 struct ieee80211_vif *vif)
465 struct rt2x00_dev *rt2x00dev = data;
466 struct rt2x00_intf *intf = vif_to_intf(vif);
468 if (vif->type != NL80211_IFTYPE_AP &&
469 vif->type != NL80211_IFTYPE_ADHOC)
473 * Clean up the beacon skb.
475 rt2x00queue_free_skb(rt2x00dev, intf->beacon->skb);
476 intf->beacon->skb = NULL;
478 spin_lock(&intf->lock);
479 intf->delayed_flags |= DELAYED_UPDATE_BEACON;
480 spin_unlock(&intf->lock);
483 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev)
485 if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
488 ieee80211_iterate_active_interfaces_atomic(rt2x00dev->hw,
489 rt2x00lib_beacondone_iter,
492 schedule_work(&rt2x00dev->intf_work);
494 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone);
496 void rt2x00lib_txdone(struct queue_entry *entry,
497 struct txdone_entry_desc *txdesc)
499 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
500 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb);
501 struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
502 enum data_queue_qid qid = skb_get_queue_mapping(entry->skb);
503 u8 rate_idx, rate_flags;
508 rt2x00queue_unmap_skb(rt2x00dev, entry->skb);
511 * If the IV/EIV data was stripped from the frame before it was
512 * passed to the hardware, we should now reinsert it again because
513 * mac80211 will expect the the same data to be present it the
514 * frame as it was passed to us.
516 if (test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags))
517 rt2x00crypto_tx_insert_iv(entry->skb);
520 * Send frame to debugfs immediately, after this call is completed
521 * we are going to overwrite the skb->cb array.
523 rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TXDONE, entry->skb);
526 * Update TX statistics.
528 rt2x00dev->link.qual.tx_success +=
529 test_bit(TXDONE_SUCCESS, &txdesc->flags);
530 rt2x00dev->link.qual.tx_failed +=
531 test_bit(TXDONE_FAILURE, &txdesc->flags);
533 rate_idx = skbdesc->tx_rate_idx;
534 rate_flags = skbdesc->tx_rate_flags;
537 * Initialize TX status
539 memset(&tx_info->status, 0, sizeof(tx_info->status));
540 tx_info->status.ack_signal = 0;
541 tx_info->status.rates[0].idx = rate_idx;
542 tx_info->status.rates[0].flags = rate_flags;
543 tx_info->status.rates[0].count = txdesc->retry + 1;
544 tx_info->status.rates[1].idx = -1; /* terminate */
546 if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK)) {
547 if (test_bit(TXDONE_SUCCESS, &txdesc->flags))
548 tx_info->flags |= IEEE80211_TX_STAT_ACK;
549 else if (test_bit(TXDONE_FAILURE, &txdesc->flags))
550 rt2x00dev->low_level_stats.dot11ACKFailureCount++;
553 if (rate_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
554 if (test_bit(TXDONE_SUCCESS, &txdesc->flags))
555 rt2x00dev->low_level_stats.dot11RTSSuccessCount++;
556 else if (test_bit(TXDONE_FAILURE, &txdesc->flags))
557 rt2x00dev->low_level_stats.dot11RTSFailureCount++;
561 * Only send the status report to mac80211 when TX status was
562 * requested by it. If this was a extra frame coming through
563 * a mac80211 library call (RTS/CTS) then we should not send the
564 * status report back.
566 if (tx_info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
567 ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb);
569 dev_kfree_skb_irq(entry->skb);
572 * Make this entry available for reuse.
577 rt2x00dev->ops->lib->init_txentry(rt2x00dev, entry);
579 clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
580 rt2x00queue_index_inc(entry->queue, Q_INDEX_DONE);
583 * If the data queue was below the threshold before the txdone
584 * handler we must make sure the packet queue in the mac80211 stack
585 * is reenabled when the txdone handler has finished.
587 if (!rt2x00queue_threshold(entry->queue))
588 ieee80211_wake_queue(rt2x00dev->hw, qid);
590 EXPORT_SYMBOL_GPL(rt2x00lib_txdone);
592 void rt2x00lib_rxdone(struct rt2x00_dev *rt2x00dev,
593 struct queue_entry *entry)
595 struct rxdone_entry_desc rxdesc;
597 struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
598 struct ieee80211_supported_band *sband;
599 struct ieee80211_hdr *hdr;
600 const struct rt2x00_rate *rate;
601 unsigned int header_length;
607 * Allocate a new sk_buffer. If no new buffer available, drop the
608 * received frame and reuse the existing buffer.
610 skb = rt2x00queue_alloc_rxskb(rt2x00dev, entry);
617 rt2x00queue_unmap_skb(rt2x00dev, entry->skb);
620 * Extract the RXD details.
622 memset(&rxdesc, 0, sizeof(rxdesc));
623 rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc);
626 * The data behind the ieee80211 header must be
627 * aligned on a 4 byte boundary.
629 header_length = ieee80211_get_hdrlen_from_skb(entry->skb);
630 align = ((unsigned long)(entry->skb->data + header_length)) & 3;
633 * Hardware might have stripped the IV/EIV/ICV data,
634 * in that case it is possible that the data was
635 * provided seperately (through hardware descriptor)
636 * in which case we should reinsert the data into the frame.
638 if ((rxdesc.flags & RX_FLAG_IV_STRIPPED)) {
639 rt2x00crypto_rx_insert_iv(entry->skb, align,
640 header_length, &rxdesc);
642 skb_push(entry->skb, align);
643 /* Move entire frame in 1 command */
644 memmove(entry->skb->data, entry->skb->data + align,
648 /* Update data pointers, trim buffer to correct size */
649 skb_trim(entry->skb, rxdesc.size);
652 * Update RX statistics.
654 sband = &rt2x00dev->bands[rt2x00dev->curr_band];
655 for (i = 0; i < sband->n_bitrates; i++) {
656 rate = rt2x00_get_rate(sband->bitrates[i].hw_value);
658 if (((rxdesc.dev_flags & RXDONE_SIGNAL_PLCP) &&
659 (rate->plcp == rxdesc.signal)) ||
660 ((rxdesc.dev_flags & RXDONE_SIGNAL_BITRATE) &&
661 (rate->bitrate == rxdesc.signal))) {
668 WARNING(rt2x00dev, "Frame received with unrecognized signal,"
669 "signal=0x%.2x, plcp=%d.\n", rxdesc.signal,
670 !!(rxdesc.dev_flags & RXDONE_SIGNAL_PLCP));
675 * Only update link status if this is a beacon frame carrying our bssid.
677 hdr = (struct ieee80211_hdr *)entry->skb->data;
678 if (ieee80211_is_beacon(hdr->frame_control) &&
679 (rxdesc.dev_flags & RXDONE_MY_BSS))
680 rt2x00lib_update_link_stats(&rt2x00dev->link, rxdesc.rssi);
682 rt2x00debug_update_crypto(rt2x00dev,
684 rxdesc.cipher_status);
686 rt2x00dev->link.qual.rx_success++;
688 rx_status->mactime = rxdesc.timestamp;
689 rx_status->rate_idx = idx;
691 rt2x00lib_calculate_link_signal(rt2x00dev, rxdesc.rssi);
692 rx_status->signal = rxdesc.rssi;
693 rx_status->flag = rxdesc.flags;
694 rx_status->antenna = rt2x00dev->link.ant.active.rx;
697 * Send frame to mac80211 & debugfs.
698 * mac80211 will clean up the skb structure.
700 rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_RXDONE, entry->skb);
701 ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb, rx_status);
704 * Replace the skb with the freshly allocated one.
709 rt2x00dev->ops->lib->init_rxentry(rt2x00dev, entry);
711 rt2x00queue_index_inc(entry->queue, Q_INDEX);
713 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
716 * Driver initialization handlers.
718 const struct rt2x00_rate rt2x00_supported_rates[12] = {
720 .flags = DEV_RATE_CCK | DEV_RATE_BASIC,
726 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
732 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
738 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
744 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
750 .flags = DEV_RATE_OFDM,
756 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
762 .flags = DEV_RATE_OFDM,
768 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
774 .flags = DEV_RATE_OFDM,
780 .flags = DEV_RATE_OFDM,
786 .flags = DEV_RATE_OFDM,
793 static void rt2x00lib_channel(struct ieee80211_channel *entry,
794 const int channel, const int tx_power,
797 entry->center_freq = ieee80211_channel_to_frequency(channel);
798 entry->hw_value = value;
799 entry->max_power = tx_power;
800 entry->max_antenna_gain = 0xff;
803 static void rt2x00lib_rate(struct ieee80211_rate *entry,
804 const u16 index, const struct rt2x00_rate *rate)
807 entry->bitrate = rate->bitrate;
808 entry->hw_value = rt2x00_create_rate_hw_value(index, 0);
809 entry->hw_value_short = entry->hw_value;
811 if (rate->flags & DEV_RATE_SHORT_PREAMBLE) {
812 entry->flags |= IEEE80211_RATE_SHORT_PREAMBLE;
813 entry->hw_value_short |= rt2x00_create_rate_hw_value(index, 1);
817 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev,
818 struct hw_mode_spec *spec)
820 struct ieee80211_hw *hw = rt2x00dev->hw;
821 struct ieee80211_channel *channels;
822 struct ieee80211_rate *rates;
823 unsigned int num_rates;
827 if (spec->supported_rates & SUPPORT_RATE_CCK)
829 if (spec->supported_rates & SUPPORT_RATE_OFDM)
832 channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL);
836 rates = kzalloc(sizeof(*rates) * num_rates, GFP_KERNEL);
838 goto exit_free_channels;
841 * Initialize Rate list.
843 for (i = 0; i < num_rates; i++)
844 rt2x00lib_rate(&rates[i], i, rt2x00_get_rate(i));
847 * Initialize Channel list.
849 for (i = 0; i < spec->num_channels; i++) {
850 rt2x00lib_channel(&channels[i],
851 spec->channels[i].channel,
852 spec->channels_info[i].tx_power1, i);
856 * Intitialize 802.11b, 802.11g
860 if (spec->supported_bands & SUPPORT_BAND_2GHZ) {
861 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_channels = 14;
862 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_bitrates = num_rates;
863 rt2x00dev->bands[IEEE80211_BAND_2GHZ].channels = channels;
864 rt2x00dev->bands[IEEE80211_BAND_2GHZ].bitrates = rates;
865 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
866 &rt2x00dev->bands[IEEE80211_BAND_2GHZ];
870 * Intitialize 802.11a
872 * Channels: OFDM, UNII, HiperLAN2.
874 if (spec->supported_bands & SUPPORT_BAND_5GHZ) {
875 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_channels =
876 spec->num_channels - 14;
877 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_bitrates =
879 rt2x00dev->bands[IEEE80211_BAND_5GHZ].channels = &channels[14];
880 rt2x00dev->bands[IEEE80211_BAND_5GHZ].bitrates = &rates[4];
881 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
882 &rt2x00dev->bands[IEEE80211_BAND_5GHZ];
889 ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n");
893 static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev)
895 if (test_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags))
896 ieee80211_unregister_hw(rt2x00dev->hw);
898 if (likely(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ])) {
899 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels);
900 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->bitrates);
901 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL;
902 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL;
905 kfree(rt2x00dev->spec.channels_info);
908 static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev)
910 struct hw_mode_spec *spec = &rt2x00dev->spec;
913 if (test_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags))
917 * Initialize HW modes.
919 status = rt2x00lib_probe_hw_modes(rt2x00dev, spec);
924 * Initialize HW fields.
926 rt2x00dev->hw->queues = rt2x00dev->ops->tx_queues;
931 status = ieee80211_register_hw(rt2x00dev->hw);
933 rt2x00lib_remove_hw(rt2x00dev);
937 set_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags);
943 * Initialization/uninitialization handlers.
945 static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
947 if (!test_and_clear_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags))
951 * Unregister extra components.
953 rt2x00rfkill_unregister(rt2x00dev);
956 * Allow the HW to uninitialize.
958 rt2x00dev->ops->lib->uninitialize(rt2x00dev);
961 * Free allocated queue entries.
963 rt2x00queue_uninitialize(rt2x00dev);
966 static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)
970 if (test_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags))
974 * Allocate all queue entries.
976 status = rt2x00queue_initialize(rt2x00dev);
981 * Initialize the device.
983 status = rt2x00dev->ops->lib->initialize(rt2x00dev);
985 rt2x00queue_uninitialize(rt2x00dev);
989 set_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags);
992 * Register the extra components.
994 rt2x00rfkill_register(rt2x00dev);
999 int rt2x00lib_start(struct rt2x00_dev *rt2x00dev)
1003 if (test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))
1007 * If this is the first interface which is added,
1008 * we should load the firmware now.
1010 retval = rt2x00lib_load_firmware(rt2x00dev);
1015 * Initialize the device.
1017 retval = rt2x00lib_initialize(rt2x00dev);
1021 rt2x00dev->intf_ap_count = 0;
1022 rt2x00dev->intf_sta_count = 0;
1023 rt2x00dev->intf_associated = 0;
1025 set_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags);
1030 void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev)
1032 if (!test_and_clear_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))
1036 * Perhaps we can add something smarter here,
1037 * but for now just disabling the radio should do.
1039 rt2x00lib_disable_radio(rt2x00dev);
1041 rt2x00dev->intf_ap_count = 0;
1042 rt2x00dev->intf_sta_count = 0;
1043 rt2x00dev->intf_associated = 0;
1047 * driver allocation handlers.
1049 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
1051 int retval = -ENOMEM;
1054 * Make room for rt2x00_intf inside the per-interface
1055 * structure ieee80211_vif.
1057 rt2x00dev->hw->vif_data_size = sizeof(struct rt2x00_intf);
1060 * Determine which operating modes are supported, all modes
1061 * which require beaconing, depend on the availability of
1064 rt2x00dev->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1065 if (rt2x00dev->ops->bcn->entry_num > 0)
1066 rt2x00dev->hw->wiphy->interface_modes |=
1067 BIT(NL80211_IFTYPE_ADHOC) |
1068 BIT(NL80211_IFTYPE_AP);
1071 * Let the driver probe the device to detect the capabilities.
1073 retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev);
1075 ERROR(rt2x00dev, "Failed to allocate device.\n");
1080 * Initialize configuration work.
1082 INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled);
1083 INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled);
1084 INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner);
1087 * Allocate queue array.
1089 retval = rt2x00queue_allocate(rt2x00dev);
1094 * Initialize ieee80211 structure.
1096 retval = rt2x00lib_probe_hw(rt2x00dev);
1098 ERROR(rt2x00dev, "Failed to initialize hw.\n");
1103 * Register extra components.
1105 rt2x00leds_register(rt2x00dev);
1106 rt2x00rfkill_allocate(rt2x00dev);
1107 rt2x00debug_register(rt2x00dev);
1109 set_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
1114 rt2x00lib_remove_dev(rt2x00dev);
1118 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev);
1120 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
1122 clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
1127 rt2x00lib_disable_radio(rt2x00dev);
1130 * Uninitialize device.
1132 rt2x00lib_uninitialize(rt2x00dev);
1135 * Free extra components
1137 rt2x00debug_deregister(rt2x00dev);
1138 rt2x00rfkill_free(rt2x00dev);
1139 rt2x00leds_unregister(rt2x00dev);
1142 * Free ieee80211_hw memory.
1144 rt2x00lib_remove_hw(rt2x00dev);
1147 * Free firmware image.
1149 rt2x00lib_free_firmware(rt2x00dev);
1152 * Free queue structures.
1154 rt2x00queue_free(rt2x00dev);
1156 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev);
1159 * Device state handlers
1162 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state)
1166 NOTICE(rt2x00dev, "Going to sleep.\n");
1169 * Only continue if mac80211 has open interfaces.
1171 if (!test_and_clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags) ||
1172 !test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))
1175 set_bit(DEVICE_STATE_STARTED_SUSPEND, &rt2x00dev->flags);
1180 rt2x00lib_stop(rt2x00dev);
1181 rt2x00lib_uninitialize(rt2x00dev);
1184 * Suspend/disable extra components.
1186 rt2x00leds_suspend(rt2x00dev);
1187 rt2x00debug_deregister(rt2x00dev);
1191 * Set device mode to sleep for power management,
1192 * on some hardware this call seems to consistently fail.
1193 * From the specifications it is hard to tell why it fails,
1194 * and if this is a "bad thing".
1195 * Overall it is safe to just ignore the failure and
1196 * continue suspending. The only downside is that the
1197 * device will not be in optimal power save mode, but with
1198 * the radio and the other components already disabled the
1199 * device is as good as disabled.
1201 retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP);
1203 WARNING(rt2x00dev, "Device failed to enter sleep state, "
1204 "continue suspending.\n");
1208 EXPORT_SYMBOL_GPL(rt2x00lib_suspend);
1210 static void rt2x00lib_resume_intf(void *data, u8 *mac,
1211 struct ieee80211_vif *vif)
1213 struct rt2x00_dev *rt2x00dev = data;
1214 struct rt2x00_intf *intf = vif_to_intf(vif);
1216 spin_lock(&intf->lock);
1218 rt2x00lib_config_intf(rt2x00dev, intf,
1219 vif->type, intf->mac, intf->bssid);
1223 * Master or Ad-hoc mode require a new beacon update.
1225 if (vif->type == NL80211_IFTYPE_AP ||
1226 vif->type == NL80211_IFTYPE_ADHOC)
1227 intf->delayed_flags |= DELAYED_UPDATE_BEACON;
1229 spin_unlock(&intf->lock);
1232 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
1236 NOTICE(rt2x00dev, "Waking up.\n");
1239 * Restore/enable extra components.
1241 rt2x00debug_register(rt2x00dev);
1242 rt2x00leds_resume(rt2x00dev);
1245 * Only continue if mac80211 had open interfaces.
1247 if (!test_and_clear_bit(DEVICE_STATE_STARTED_SUSPEND, &rt2x00dev->flags))
1251 * Reinitialize device and all active interfaces.
1253 retval = rt2x00lib_start(rt2x00dev);
1258 * Reconfigure device.
1260 retval = rt2x00mac_config(rt2x00dev->hw, ~0);
1265 * Iterator over each active interface to
1266 * reconfigure the hardware.
1268 ieee80211_iterate_active_interfaces(rt2x00dev->hw,
1269 rt2x00lib_resume_intf, rt2x00dev);
1272 * We are ready again to receive requests from mac80211.
1274 set_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
1277 * It is possible that during that mac80211 has attempted
1278 * to send frames while we were suspending or resuming.
1279 * In that case we have disabled the TX queue and should
1280 * now enable it again
1282 ieee80211_wake_queues(rt2x00dev->hw);
1285 * During interface iteration we might have changed the
1286 * delayed_flags, time to handles the event by calling
1287 * the work handler directly.
1289 rt2x00lib_intf_scheduled(&rt2x00dev->intf_work);
1294 rt2x00lib_stop(rt2x00dev);
1295 rt2x00lib_uninitialize(rt2x00dev);
1296 rt2x00debug_deregister(rt2x00dev);
1300 EXPORT_SYMBOL_GPL(rt2x00lib_resume);
1301 #endif /* CONFIG_PM */
1304 * rt2x00lib module information.
1306 MODULE_AUTHOR(DRV_PROJECT);
1307 MODULE_VERSION(DRV_VERSION);
1308 MODULE_DESCRIPTION("rt2x00 library");
1309 MODULE_LICENSE("GPL");