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 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_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_ENABLED_RADIO, &rt2x00dev->flags))
141 * Stop all scheduled work.
143 if (work_pending(&rt2x00dev->intf_work))
144 cancel_work_sync(&rt2x00dev->intf_work);
145 if (work_pending(&rt2x00dev->filter_work))
146 cancel_work_sync(&rt2x00dev->filter_work);
149 * Stop the TX queues.
151 ieee80211_stop_queues(rt2x00dev->hw);
156 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF);
161 rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF);
162 rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_IRQ_OFF);
163 rt2x00led_led_activity(rt2x00dev, false);
164 rt2x00leds_led_radio(rt2x00dev, false);
167 void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, enum dev_state state)
170 * When we are disabling the RX, we should also stop the link tuner.
172 if (state == STATE_RADIO_RX_OFF)
173 rt2x00lib_stop_link_tuner(rt2x00dev);
175 rt2x00dev->ops->lib->set_device_state(rt2x00dev, state);
178 * When we are enabling the RX, we should also start the link tuner.
180 if (state == STATE_RADIO_RX_ON &&
181 (rt2x00dev->intf_ap_count || rt2x00dev->intf_sta_count))
182 rt2x00lib_start_link_tuner(rt2x00dev);
185 static void rt2x00lib_evaluate_antenna_sample(struct rt2x00_dev *rt2x00dev)
187 enum antenna rx = rt2x00dev->link.ant.active.rx;
188 enum antenna tx = rt2x00dev->link.ant.active.tx;
190 rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_A);
192 rt2x00_get_link_ant_rssi_history(&rt2x00dev->link, ANTENNA_B);
195 * We are done sampling. Now we should evaluate the results.
197 rt2x00dev->link.ant.flags &= ~ANTENNA_MODE_SAMPLE;
200 * During the last period we have sampled the RSSI
201 * from both antenna's. It now is time to determine
202 * which antenna demonstrated the best performance.
203 * When we are already on the antenna with the best
204 * performance, then there really is nothing for us
207 if (sample_a == sample_b)
210 if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY)
211 rx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B;
213 if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)
214 tx = (sample_a > sample_b) ? ANTENNA_A : ANTENNA_B;
216 rt2x00lib_config_antenna(rt2x00dev, rx, tx);
219 static void rt2x00lib_evaluate_antenna_eval(struct rt2x00_dev *rt2x00dev)
221 enum antenna rx = rt2x00dev->link.ant.active.rx;
222 enum antenna tx = rt2x00dev->link.ant.active.tx;
223 int rssi_curr = rt2x00_get_link_ant_rssi(&rt2x00dev->link);
224 int rssi_old = rt2x00_update_ant_rssi(&rt2x00dev->link, rssi_curr);
227 * Legacy driver indicates that we should swap antenna's
228 * when the difference in RSSI is greater that 5. This
229 * also should be done when the RSSI was actually better
230 * then the previous sample.
231 * When the difference exceeds the threshold we should
232 * sample the rssi from the other antenna to make a valid
233 * comparison between the 2 antennas.
235 if (abs(rssi_curr - rssi_old) < 5)
238 rt2x00dev->link.ant.flags |= ANTENNA_MODE_SAMPLE;
240 if (rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY)
241 rx = (rx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
243 if (rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)
244 tx = (tx == ANTENNA_A) ? ANTENNA_B : ANTENNA_A;
246 rt2x00lib_config_antenna(rt2x00dev, rx, tx);
249 static void rt2x00lib_evaluate_antenna(struct rt2x00_dev *rt2x00dev)
252 * Determine if software diversity is enabled for
253 * either the TX or RX antenna (or both).
254 * Always perform this check since within the link
255 * tuner interval the configuration might have changed.
257 rt2x00dev->link.ant.flags &= ~ANTENNA_RX_DIVERSITY;
258 rt2x00dev->link.ant.flags &= ~ANTENNA_TX_DIVERSITY;
260 if (rt2x00dev->hw->conf.antenna_sel_rx == 0 &&
261 rt2x00dev->default_ant.rx == ANTENNA_SW_DIVERSITY)
262 rt2x00dev->link.ant.flags |= ANTENNA_RX_DIVERSITY;
263 if (rt2x00dev->hw->conf.antenna_sel_tx == 0 &&
264 rt2x00dev->default_ant.tx == ANTENNA_SW_DIVERSITY)
265 rt2x00dev->link.ant.flags |= ANTENNA_TX_DIVERSITY;
267 if (!(rt2x00dev->link.ant.flags & ANTENNA_RX_DIVERSITY) &&
268 !(rt2x00dev->link.ant.flags & ANTENNA_TX_DIVERSITY)) {
269 rt2x00dev->link.ant.flags = 0;
274 * If we have only sampled the data over the last period
275 * we should now harvest the data. Otherwise just evaluate
276 * the data. The latter should only be performed once
279 if (rt2x00dev->link.ant.flags & ANTENNA_MODE_SAMPLE)
280 rt2x00lib_evaluate_antenna_sample(rt2x00dev);
281 else if (rt2x00dev->link.count & 1)
282 rt2x00lib_evaluate_antenna_eval(rt2x00dev);
285 static void rt2x00lib_update_link_stats(struct link *link, int rssi)
292 if (link->qual.avg_rssi)
293 avg_rssi = MOVING_AVERAGE(link->qual.avg_rssi, rssi, 8);
294 link->qual.avg_rssi = avg_rssi;
297 * Update antenna RSSI
299 if (link->ant.rssi_ant)
300 rssi = MOVING_AVERAGE(link->ant.rssi_ant, rssi, 8);
301 link->ant.rssi_ant = rssi;
304 static void rt2x00lib_precalculate_link_signal(struct link_qual *qual)
306 if (qual->rx_failed || qual->rx_success)
307 qual->rx_percentage =
308 (qual->rx_success * 100) /
309 (qual->rx_failed + qual->rx_success);
311 qual->rx_percentage = 50;
313 if (qual->tx_failed || qual->tx_success)
314 qual->tx_percentage =
315 (qual->tx_success * 100) /
316 (qual->tx_failed + qual->tx_success);
318 qual->tx_percentage = 50;
320 qual->rx_success = 0;
322 qual->tx_success = 0;
326 static int rt2x00lib_calculate_link_signal(struct rt2x00_dev *rt2x00dev,
329 int rssi_percentage = 0;
333 * We need a positive value for the RSSI.
336 rssi += rt2x00dev->rssi_offset;
339 * Calculate the different percentages,
340 * which will be used for the signal.
342 if (rt2x00dev->rssi_offset)
343 rssi_percentage = (rssi * 100) / rt2x00dev->rssi_offset;
346 * Add the individual percentages and use the WEIGHT
347 * defines to calculate the current link signal.
349 signal = ((WEIGHT_RSSI * rssi_percentage) +
350 (WEIGHT_TX * rt2x00dev->link.qual.tx_percentage) +
351 (WEIGHT_RX * rt2x00dev->link.qual.rx_percentage)) / 100;
353 return (signal > 100) ? 100 : signal;
356 static void rt2x00lib_link_tuner(struct work_struct *work)
358 struct rt2x00_dev *rt2x00dev =
359 container_of(work, struct rt2x00_dev, link.work.work);
362 * When the radio is shutting down we should
363 * immediately cease all link tuning.
365 if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
371 rt2x00dev->ops->lib->link_stats(rt2x00dev, &rt2x00dev->link.qual);
372 rt2x00dev->low_level_stats.dot11FCSErrorCount +=
373 rt2x00dev->link.qual.rx_failed;
376 * Only perform the link tuning when Link tuning
377 * has been enabled (This could have been disabled from the EEPROM).
379 if (!test_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags))
380 rt2x00dev->ops->lib->link_tuner(rt2x00dev);
383 * Precalculate a portion of the link signal which is
384 * in based on the tx/rx success/failure counters.
386 rt2x00lib_precalculate_link_signal(&rt2x00dev->link.qual);
389 * Send a signal to the led to update the led signal strength.
391 rt2x00leds_led_quality(rt2x00dev, rt2x00dev->link.qual.avg_rssi);
394 * Evaluate antenna setup, make this the last step since this could
395 * possibly reset some statistics.
397 rt2x00lib_evaluate_antenna(rt2x00dev);
400 * Increase tuner counter, and reschedule the next link tuner run.
402 rt2x00dev->link.count++;
403 queue_delayed_work(rt2x00dev->hw->workqueue, &rt2x00dev->link.work,
407 static void rt2x00lib_packetfilter_scheduled(struct work_struct *work)
409 struct rt2x00_dev *rt2x00dev =
410 container_of(work, struct rt2x00_dev, filter_work);
412 rt2x00dev->ops->lib->config_filter(rt2x00dev, rt2x00dev->packet_filter);
415 static void rt2x00lib_intf_scheduled_iter(void *data, u8 *mac,
416 struct ieee80211_vif *vif)
418 struct rt2x00_dev *rt2x00dev = data;
419 struct rt2x00_intf *intf = vif_to_intf(vif);
421 struct ieee80211_bss_conf conf;
425 * Copy all data we need during this action under the protection
426 * of a spinlock. Otherwise race conditions might occur which results
427 * into an invalid configuration.
429 spin_lock(&intf->lock);
431 memcpy(&conf, &intf->conf, sizeof(conf));
432 delayed_flags = intf->delayed_flags;
433 intf->delayed_flags = 0;
435 spin_unlock(&intf->lock);
437 if (delayed_flags & DELAYED_UPDATE_BEACON) {
438 skb = ieee80211_beacon_get(rt2x00dev->hw, vif);
440 rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw, skb))
444 if (delayed_flags & DELAYED_CONFIG_ERP)
445 rt2x00lib_config_erp(rt2x00dev, intf, &intf->conf);
447 if (delayed_flags & DELAYED_LED_ASSOC)
448 rt2x00leds_led_assoc(rt2x00dev, !!rt2x00dev->intf_associated);
451 static void rt2x00lib_intf_scheduled(struct work_struct *work)
453 struct rt2x00_dev *rt2x00dev =
454 container_of(work, struct rt2x00_dev, intf_work);
457 * Iterate over each interface and perform the
458 * requested configurations.
460 ieee80211_iterate_active_interfaces(rt2x00dev->hw,
461 rt2x00lib_intf_scheduled_iter,
466 * Interrupt context handlers.
468 static void rt2x00lib_beacondone_iter(void *data, u8 *mac,
469 struct ieee80211_vif *vif)
471 struct rt2x00_intf *intf = vif_to_intf(vif);
473 if (vif->type != IEEE80211_IF_TYPE_AP &&
474 vif->type != IEEE80211_IF_TYPE_IBSS)
477 spin_lock(&intf->lock);
478 intf->delayed_flags |= DELAYED_UPDATE_BEACON;
479 spin_unlock(&intf->lock);
482 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev)
484 if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
487 ieee80211_iterate_active_interfaces_atomic(rt2x00dev->hw,
488 rt2x00lib_beacondone_iter,
491 queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->intf_work);
493 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone);
495 void rt2x00lib_txdone(struct queue_entry *entry,
496 struct txdone_entry_desc *txdesc)
498 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
499 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb);
502 * Send frame to debugfs immediately, after this call is completed
503 * we are going to overwrite the skb->cb array.
505 rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TXDONE, entry->skb);
508 * Update TX statistics.
510 rt2x00dev->link.qual.tx_success +=
511 test_bit(TXDONE_SUCCESS, &txdesc->flags);
512 rt2x00dev->link.qual.tx_failed +=
513 test_bit(TXDONE_FAILURE, &txdesc->flags);
516 * Initialize TX status
518 memset(&tx_info->status, 0, sizeof(tx_info->status));
519 tx_info->status.ack_signal = 0;
520 tx_info->status.excessive_retries =
521 test_bit(TXDONE_EXCESSIVE_RETRY, &txdesc->flags);
522 tx_info->status.retry_count = txdesc->retry;
524 if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK)) {
525 if (test_bit(TXDONE_SUCCESS, &txdesc->flags))
526 tx_info->flags |= IEEE80211_TX_STAT_ACK;
527 else if (test_bit(TXDONE_FAILURE, &txdesc->flags))
528 rt2x00dev->low_level_stats.dot11ACKFailureCount++;
531 if (tx_info->flags & IEEE80211_TX_CTL_USE_RTS_CTS) {
532 if (test_bit(TXDONE_SUCCESS, &txdesc->flags))
533 rt2x00dev->low_level_stats.dot11RTSSuccessCount++;
534 else if (test_bit(TXDONE_FAILURE, &txdesc->flags))
535 rt2x00dev->low_level_stats.dot11RTSFailureCount++;
539 * Only send the status report to mac80211 when TX status was
540 * requested by it. If this was a extra frame coming through
541 * a mac80211 library call (RTS/CTS) then we should not send the
542 * status report back.
544 if (tx_info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
545 ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb);
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 unsigned int header_size = ieee80211_get_hdrlen_from_skb(entry->skb);
558 struct ieee80211_supported_band *sband;
559 struct ieee80211_hdr *hdr;
560 const struct rt2x00_rate *rate;
567 * The data behind the ieee80211 header must be
568 * aligned on a 4 byte boundary.
570 align = ((unsigned long)(entry->skb->data + header_size)) & 3;
573 skb_push(entry->skb, align);
574 /* Move entire frame in 1 command */
575 memmove(entry->skb->data, entry->skb->data + align,
579 /* Update data pointers, trim buffer to correct size */
580 skb_trim(entry->skb, rxdesc->size);
583 * Update RX statistics.
585 sband = &rt2x00dev->bands[rt2x00dev->curr_band];
586 for (i = 0; i < sband->n_bitrates; i++) {
587 rate = rt2x00_get_rate(sband->bitrates[i].hw_value);
589 if (((rxdesc->dev_flags & RXDONE_SIGNAL_PLCP) &&
590 (rate->plcp == rxdesc->signal)) ||
591 (!(rxdesc->dev_flags & RXDONE_SIGNAL_PLCP) &&
592 (rate->bitrate == rxdesc->signal))) {
599 WARNING(rt2x00dev, "Frame received with unrecognized signal,"
600 "signal=0x%.2x, plcp=%d.\n", rxdesc->signal,
601 !!(rxdesc->dev_flags & RXDONE_SIGNAL_PLCP));
606 * Only update link status if this is a beacon frame carrying our bssid.
608 hdr = (struct ieee80211_hdr *)entry->skb->data;
609 fc = le16_to_cpu(hdr->frame_control);
610 if (is_beacon(fc) && (rxdesc->dev_flags & RXDONE_MY_BSS))
611 rt2x00lib_update_link_stats(&rt2x00dev->link, rxdesc->rssi);
613 rt2x00dev->link.qual.rx_success++;
615 rx_status->rate_idx = idx;
617 rt2x00lib_calculate_link_signal(rt2x00dev, rxdesc->rssi);
618 rx_status->signal = rxdesc->rssi;
619 rx_status->flag = rxdesc->flags;
620 rx_status->antenna = rt2x00dev->link.ant.active.rx;
623 * Send frame to mac80211 & debugfs.
624 * mac80211 will clean up the skb structure.
626 rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_RXDONE, entry->skb);
627 ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb, rx_status);
630 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
633 * Driver initialization handlers.
635 const struct rt2x00_rate rt2x00_supported_rates[12] = {
637 .flags = DEV_RATE_CCK | DEV_RATE_BASIC,
643 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
649 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
655 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE | DEV_RATE_BASIC,
661 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
667 .flags = DEV_RATE_OFDM,
673 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
679 .flags = DEV_RATE_OFDM,
685 .flags = DEV_RATE_OFDM | DEV_RATE_BASIC,
691 .flags = DEV_RATE_OFDM,
697 .flags = DEV_RATE_OFDM,
703 .flags = DEV_RATE_OFDM,
710 static void rt2x00lib_channel(struct ieee80211_channel *entry,
711 const int channel, const int tx_power,
714 entry->center_freq = ieee80211_channel_to_frequency(channel);
715 entry->hw_value = value;
716 entry->max_power = tx_power;
717 entry->max_antenna_gain = 0xff;
720 static void rt2x00lib_rate(struct ieee80211_rate *entry,
721 const u16 index, const struct rt2x00_rate *rate)
724 entry->bitrate = rate->bitrate;
725 entry->hw_value = rt2x00_create_rate_hw_value(index, 0);
726 entry->hw_value_short = entry->hw_value;
728 if (rate->flags & DEV_RATE_SHORT_PREAMBLE) {
729 entry->flags |= IEEE80211_RATE_SHORT_PREAMBLE;
730 entry->hw_value_short |= rt2x00_create_rate_hw_value(index, 1);
734 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev,
735 struct hw_mode_spec *spec)
737 struct ieee80211_hw *hw = rt2x00dev->hw;
738 struct ieee80211_channel *channels;
739 struct ieee80211_rate *rates;
740 unsigned int num_rates;
742 unsigned char tx_power;
745 if (spec->supported_rates & SUPPORT_RATE_CCK)
747 if (spec->supported_rates & SUPPORT_RATE_OFDM)
750 channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL);
754 rates = kzalloc(sizeof(*rates) * num_rates, GFP_KERNEL);
756 goto exit_free_channels;
759 * Initialize Rate list.
761 for (i = 0; i < num_rates; i++)
762 rt2x00lib_rate(&rates[i], i, rt2x00_get_rate(i));
765 * Initialize Channel list.
767 for (i = 0; i < spec->num_channels; i++) {
768 if (spec->channels[i].channel <= 14) {
769 if (spec->tx_power_bg)
770 tx_power = spec->tx_power_bg[i];
772 tx_power = spec->tx_power_default;
774 if (spec->tx_power_a)
775 tx_power = spec->tx_power_a[i];
777 tx_power = spec->tx_power_default;
780 rt2x00lib_channel(&channels[i],
781 spec->channels[i].channel, tx_power, i);
785 * Intitialize 802.11b, 802.11g
789 if (spec->supported_bands & SUPPORT_BAND_2GHZ) {
790 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_channels = 14;
791 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_bitrates = num_rates;
792 rt2x00dev->bands[IEEE80211_BAND_2GHZ].channels = channels;
793 rt2x00dev->bands[IEEE80211_BAND_2GHZ].bitrates = rates;
794 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
795 &rt2x00dev->bands[IEEE80211_BAND_2GHZ];
799 * Intitialize 802.11a
801 * Channels: OFDM, UNII, HiperLAN2.
803 if (spec->supported_bands & SUPPORT_BAND_5GHZ) {
804 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_channels =
805 spec->num_channels - 14;
806 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_bitrates =
808 rt2x00dev->bands[IEEE80211_BAND_5GHZ].channels = &channels[14];
809 rt2x00dev->bands[IEEE80211_BAND_5GHZ].bitrates = &rates[4];
810 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
811 &rt2x00dev->bands[IEEE80211_BAND_5GHZ];
818 ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n");
822 static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev)
824 if (test_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags))
825 ieee80211_unregister_hw(rt2x00dev->hw);
827 if (likely(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ])) {
828 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels);
829 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->bitrates);
830 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL;
831 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL;
835 static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev)
837 struct hw_mode_spec *spec = &rt2x00dev->spec;
841 * Initialize HW modes.
843 status = rt2x00lib_probe_hw_modes(rt2x00dev, spec);
848 * Initialize HW fields.
850 rt2x00dev->hw->queues = rt2x00dev->ops->tx_queues;
855 status = ieee80211_register_hw(rt2x00dev->hw);
857 rt2x00lib_remove_hw(rt2x00dev);
861 __set_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags);
867 * Initialization/uninitialization handlers.
869 static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
871 if (!__test_and_clear_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
875 * Unregister extra components.
877 rt2x00rfkill_unregister(rt2x00dev);
880 * Allow the HW to uninitialize.
882 rt2x00dev->ops->lib->uninitialize(rt2x00dev);
885 * Free allocated queue entries.
887 rt2x00queue_uninitialize(rt2x00dev);
890 static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)
894 if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
898 * Allocate all queue entries.
900 status = rt2x00queue_initialize(rt2x00dev);
905 * Initialize the device.
907 status = rt2x00dev->ops->lib->initialize(rt2x00dev);
909 rt2x00queue_uninitialize(rt2x00dev);
913 __set_bit(DEVICE_INITIALIZED, &rt2x00dev->flags);
916 * Register the extra components.
918 rt2x00rfkill_register(rt2x00dev);
923 int rt2x00lib_start(struct rt2x00_dev *rt2x00dev)
927 if (test_bit(DEVICE_STARTED, &rt2x00dev->flags))
931 * If this is the first interface which is added,
932 * we should load the firmware now.
934 retval = rt2x00lib_load_firmware(rt2x00dev);
939 * Initialize the device.
941 retval = rt2x00lib_initialize(rt2x00dev);
948 retval = rt2x00lib_enable_radio(rt2x00dev);
950 rt2x00lib_uninitialize(rt2x00dev);
954 rt2x00dev->intf_ap_count = 0;
955 rt2x00dev->intf_sta_count = 0;
956 rt2x00dev->intf_associated = 0;
958 __set_bit(DEVICE_STARTED, &rt2x00dev->flags);
963 void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev)
965 if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
969 * Perhaps we can add something smarter here,
970 * but for now just disabling the radio should do.
972 rt2x00lib_disable_radio(rt2x00dev);
974 rt2x00dev->intf_ap_count = 0;
975 rt2x00dev->intf_sta_count = 0;
976 rt2x00dev->intf_associated = 0;
978 __clear_bit(DEVICE_STARTED, &rt2x00dev->flags);
982 * driver allocation handlers.
984 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
986 int retval = -ENOMEM;
989 * Make room for rt2x00_intf inside the per-interface
990 * structure ieee80211_vif.
992 rt2x00dev->hw->vif_data_size = sizeof(struct rt2x00_intf);
995 * Let the driver probe the device to detect the capabilities.
997 retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev);
999 ERROR(rt2x00dev, "Failed to allocate device.\n");
1004 * Initialize configuration work.
1006 INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled);
1007 INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled);
1008 INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner);
1011 * Allocate queue array.
1013 retval = rt2x00queue_allocate(rt2x00dev);
1018 * Initialize ieee80211 structure.
1020 retval = rt2x00lib_probe_hw(rt2x00dev);
1022 ERROR(rt2x00dev, "Failed to initialize hw.\n");
1027 * Register extra components.
1029 rt2x00leds_register(rt2x00dev);
1030 rt2x00rfkill_allocate(rt2x00dev);
1031 rt2x00debug_register(rt2x00dev);
1033 __set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1038 rt2x00lib_remove_dev(rt2x00dev);
1042 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev);
1044 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
1046 __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1051 rt2x00lib_disable_radio(rt2x00dev);
1054 * Uninitialize device.
1056 rt2x00lib_uninitialize(rt2x00dev);
1059 * Free extra components
1061 rt2x00debug_deregister(rt2x00dev);
1062 rt2x00rfkill_free(rt2x00dev);
1063 rt2x00leds_unregister(rt2x00dev);
1066 * Free ieee80211_hw memory.
1068 rt2x00lib_remove_hw(rt2x00dev);
1071 * Free firmware image.
1073 rt2x00lib_free_firmware(rt2x00dev);
1076 * Free queue structures.
1078 rt2x00queue_free(rt2x00dev);
1080 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev);
1083 * Device state handlers
1086 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state)
1090 NOTICE(rt2x00dev, "Going to sleep.\n");
1091 __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1094 * Only continue if mac80211 has open interfaces.
1096 if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1098 __set_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags);
1103 rt2x00lib_stop(rt2x00dev);
1104 rt2x00lib_uninitialize(rt2x00dev);
1107 * Suspend/disable extra components.
1109 rt2x00leds_suspend(rt2x00dev);
1110 rt2x00rfkill_suspend(rt2x00dev);
1111 rt2x00debug_deregister(rt2x00dev);
1115 * Set device mode to sleep for power management,
1116 * on some hardware this call seems to consistently fail.
1117 * From the specifications it is hard to tell why it fails,
1118 * and if this is a "bad thing".
1119 * Overall it is safe to just ignore the failure and
1120 * continue suspending. The only downside is that the
1121 * device will not be in optimal power save mode, but with
1122 * the radio and the other components already disabled the
1123 * device is as good as disabled.
1125 retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP);
1127 WARNING(rt2x00dev, "Device failed to enter sleep state, "
1128 "continue suspending.\n");
1132 EXPORT_SYMBOL_GPL(rt2x00lib_suspend);
1134 static void rt2x00lib_resume_intf(void *data, u8 *mac,
1135 struct ieee80211_vif *vif)
1137 struct rt2x00_dev *rt2x00dev = data;
1138 struct rt2x00_intf *intf = vif_to_intf(vif);
1140 spin_lock(&intf->lock);
1142 rt2x00lib_config_intf(rt2x00dev, intf,
1143 vif->type, intf->mac, intf->bssid);
1147 * Master or Ad-hoc mode require a new beacon update.
1149 if (vif->type == IEEE80211_IF_TYPE_AP ||
1150 vif->type == IEEE80211_IF_TYPE_IBSS)
1151 intf->delayed_flags |= DELAYED_UPDATE_BEACON;
1153 spin_unlock(&intf->lock);
1156 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
1160 NOTICE(rt2x00dev, "Waking up.\n");
1163 * Restore/enable extra components.
1165 rt2x00debug_register(rt2x00dev);
1166 rt2x00rfkill_resume(rt2x00dev);
1167 rt2x00leds_resume(rt2x00dev);
1170 * Only continue if mac80211 had open interfaces.
1172 if (!__test_and_clear_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags))
1176 * Reinitialize device and all active interfaces.
1178 retval = rt2x00lib_start(rt2x00dev);
1183 * Reconfigure device.
1185 rt2x00lib_config(rt2x00dev, &rt2x00dev->hw->conf, 1);
1186 if (!rt2x00dev->hw->conf.radio_enabled)
1187 rt2x00lib_disable_radio(rt2x00dev);
1190 * Iterator over each active interface to
1191 * reconfigure the hardware.
1193 ieee80211_iterate_active_interfaces(rt2x00dev->hw,
1194 rt2x00lib_resume_intf, rt2x00dev);
1197 * We are ready again to receive requests from mac80211.
1199 __set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1202 * It is possible that during that mac80211 has attempted
1203 * to send frames while we were suspending or resuming.
1204 * In that case we have disabled the TX queue and should
1205 * now enable it again
1207 ieee80211_wake_queues(rt2x00dev->hw);
1210 * During interface iteration we might have changed the
1211 * delayed_flags, time to handles the event by calling
1212 * the work handler directly.
1214 rt2x00lib_intf_scheduled(&rt2x00dev->intf_work);
1219 rt2x00lib_disable_radio(rt2x00dev);
1220 rt2x00lib_uninitialize(rt2x00dev);
1221 rt2x00debug_deregister(rt2x00dev);
1225 EXPORT_SYMBOL_GPL(rt2x00lib_resume);
1226 #endif /* CONFIG_PM */
1229 * rt2x00lib module information.
1231 MODULE_AUTHOR(DRV_PROJECT);
1232 MODULE_VERSION(DRV_VERSION);
1233 MODULE_DESCRIPTION("rt2x00 library");
1234 MODULE_LICENSE("GPL");