2 Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
3 <http://rt2x00.serialmonkey.com>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the
17 Free Software Foundation, Inc.,
18 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 Abstract: rt2x00 generic device routines.
26 #include <linux/kernel.h>
27 #include <linux/module.h>
30 #include "rt2x00lib.h"
31 #include "rt2x00dump.h"
34 * Link tuning handlers
36 void rt2x00lib_reset_link_tuner(struct rt2x00_dev
*rt2x00dev
)
38 if (!test_bit(DEVICE_ENABLED_RADIO
, &rt2x00dev
->flags
))
42 * Reset link information.
43 * Both the currently active vgc level as well as
44 * the link tuner counter should be reset. Resetting
45 * the counter is important for devices where the
46 * device should only perform link tuning during the
47 * first minute after being enabled.
49 rt2x00dev
->link
.count
= 0;
50 rt2x00dev
->link
.vgc_level
= 0;
53 * Reset the link tuner.
55 rt2x00dev
->ops
->lib
->reset_tuner(rt2x00dev
);
58 static void rt2x00lib_start_link_tuner(struct rt2x00_dev
*rt2x00dev
)
61 * Clear all (possibly) pre-existing quality statistics.
63 memset(&rt2x00dev
->link
.qual
, 0, sizeof(rt2x00dev
->link
.qual
));
66 * The RX and TX percentage should start at 50%
67 * this will assure we will get at least get some
68 * decent value when the link tuner starts.
69 * The value will be dropped and overwritten with
70 * the correct (measured )value anyway during the
71 * first run of the link tuner.
73 rt2x00dev
->link
.qual
.rx_percentage
= 50;
74 rt2x00dev
->link
.qual
.tx_percentage
= 50;
76 rt2x00lib_reset_link_tuner(rt2x00dev
);
78 queue_delayed_work(rt2x00dev
->hw
->workqueue
,
79 &rt2x00dev
->link
.work
, LINK_TUNE_INTERVAL
);
82 static void rt2x00lib_stop_link_tuner(struct rt2x00_dev
*rt2x00dev
)
84 cancel_delayed_work_sync(&rt2x00dev
->link
.work
);
88 * Radio control handlers.
90 int rt2x00lib_enable_radio(struct rt2x00_dev
*rt2x00dev
)
95 * Don't enable the radio twice.
96 * And check if the hardware button has been disabled.
98 if (test_bit(DEVICE_ENABLED_RADIO
, &rt2x00dev
->flags
) ||
99 test_bit(DEVICE_DISABLED_RADIO_HW
, &rt2x00dev
->flags
))
103 * Initialize all data queues.
105 rt2x00queue_init_rx(rt2x00dev
);
106 rt2x00queue_init_tx(rt2x00dev
);
112 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_ON
);
116 rt2x00leds_led_radio(rt2x00dev
, true);
117 rt2x00led_led_activity(rt2x00dev
, true);
119 __set_bit(DEVICE_ENABLED_RADIO
, &rt2x00dev
->flags
);
124 rt2x00lib_toggle_rx(rt2x00dev
, STATE_RADIO_RX_ON
);
127 * Start the TX queues.
129 ieee80211_start_queues(rt2x00dev
->hw
);
134 void rt2x00lib_disable_radio(struct rt2x00_dev
*rt2x00dev
)
136 if (!__test_and_clear_bit(DEVICE_ENABLED_RADIO
, &rt2x00dev
->flags
))
140 * Stop all scheduled work.
142 if (work_pending(&rt2x00dev
->intf_work
))
143 cancel_work_sync(&rt2x00dev
->intf_work
);
144 if (work_pending(&rt2x00dev
->filter_work
))
145 cancel_work_sync(&rt2x00dev
->filter_work
);
148 * Stop the TX queues.
150 ieee80211_stop_queues(rt2x00dev
->hw
);
155 rt2x00lib_toggle_rx(rt2x00dev
, STATE_RADIO_RX_OFF
);
160 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_OFF
);
161 rt2x00led_led_activity(rt2x00dev
, false);
162 rt2x00leds_led_radio(rt2x00dev
, false);
165 void rt2x00lib_toggle_rx(struct rt2x00_dev
*rt2x00dev
, enum dev_state state
)
168 * When we are disabling the RX, we should also stop the link tuner.
170 if (state
== STATE_RADIO_RX_OFF
)
171 rt2x00lib_stop_link_tuner(rt2x00dev
);
173 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, state
);
176 * When we are enabling the RX, we should also start the link tuner.
178 if (state
== STATE_RADIO_RX_ON
&&
179 (rt2x00dev
->intf_ap_count
|| rt2x00dev
->intf_sta_count
))
180 rt2x00lib_start_link_tuner(rt2x00dev
);
183 static void rt2x00lib_evaluate_antenna_sample(struct rt2x00_dev
*rt2x00dev
)
185 enum antenna rx
= rt2x00dev
->link
.ant
.active
.rx
;
186 enum antenna tx
= rt2x00dev
->link
.ant
.active
.tx
;
188 rt2x00_get_link_ant_rssi_history(&rt2x00dev
->link
, ANTENNA_A
);
190 rt2x00_get_link_ant_rssi_history(&rt2x00dev
->link
, ANTENNA_B
);
193 * We are done sampling. Now we should evaluate the results.
195 rt2x00dev
->link
.ant
.flags
&= ~ANTENNA_MODE_SAMPLE
;
198 * During the last period we have sampled the RSSI
199 * from both antenna's. It now is time to determine
200 * which antenna demonstrated the best performance.
201 * When we are already on the antenna with the best
202 * performance, then there really is nothing for us
205 if (sample_a
== sample_b
)
208 if (rt2x00dev
->link
.ant
.flags
& ANTENNA_RX_DIVERSITY
)
209 rx
= (sample_a
> sample_b
) ? ANTENNA_A
: ANTENNA_B
;
211 if (rt2x00dev
->link
.ant
.flags
& ANTENNA_TX_DIVERSITY
)
212 tx
= (sample_a
> sample_b
) ? ANTENNA_A
: ANTENNA_B
;
214 rt2x00lib_config_antenna(rt2x00dev
, rx
, tx
);
217 static void rt2x00lib_evaluate_antenna_eval(struct rt2x00_dev
*rt2x00dev
)
219 enum antenna rx
= rt2x00dev
->link
.ant
.active
.rx
;
220 enum antenna tx
= rt2x00dev
->link
.ant
.active
.tx
;
221 int rssi_curr
= rt2x00_get_link_ant_rssi(&rt2x00dev
->link
);
222 int rssi_old
= rt2x00_update_ant_rssi(&rt2x00dev
->link
, rssi_curr
);
225 * Legacy driver indicates that we should swap antenna's
226 * when the difference in RSSI is greater that 5. This
227 * also should be done when the RSSI was actually better
228 * then the previous sample.
229 * When the difference exceeds the threshold we should
230 * sample the rssi from the other antenna to make a valid
231 * comparison between the 2 antennas.
233 if (abs(rssi_curr
- rssi_old
) < 5)
236 rt2x00dev
->link
.ant
.flags
|= ANTENNA_MODE_SAMPLE
;
238 if (rt2x00dev
->link
.ant
.flags
& ANTENNA_RX_DIVERSITY
)
239 rx
= (rx
== ANTENNA_A
) ? ANTENNA_B
: ANTENNA_A
;
241 if (rt2x00dev
->link
.ant
.flags
& ANTENNA_TX_DIVERSITY
)
242 tx
= (tx
== ANTENNA_A
) ? ANTENNA_B
: ANTENNA_A
;
244 rt2x00lib_config_antenna(rt2x00dev
, rx
, tx
);
247 static void rt2x00lib_evaluate_antenna(struct rt2x00_dev
*rt2x00dev
)
250 * Determine if software diversity is enabled for
251 * either the TX or RX antenna (or both).
252 * Always perform this check since within the link
253 * tuner interval the configuration might have changed.
255 rt2x00dev
->link
.ant
.flags
&= ~ANTENNA_RX_DIVERSITY
;
256 rt2x00dev
->link
.ant
.flags
&= ~ANTENNA_TX_DIVERSITY
;
258 if (rt2x00dev
->hw
->conf
.antenna_sel_rx
== 0 &&
259 rt2x00dev
->default_ant
.rx
== ANTENNA_SW_DIVERSITY
)
260 rt2x00dev
->link
.ant
.flags
|= ANTENNA_RX_DIVERSITY
;
261 if (rt2x00dev
->hw
->conf
.antenna_sel_tx
== 0 &&
262 rt2x00dev
->default_ant
.tx
== ANTENNA_SW_DIVERSITY
)
263 rt2x00dev
->link
.ant
.flags
|= ANTENNA_TX_DIVERSITY
;
265 if (!(rt2x00dev
->link
.ant
.flags
& ANTENNA_RX_DIVERSITY
) &&
266 !(rt2x00dev
->link
.ant
.flags
& ANTENNA_TX_DIVERSITY
)) {
267 rt2x00dev
->link
.ant
.flags
= 0;
272 * If we have only sampled the data over the last period
273 * we should now harvest the data. Otherwise just evaluate
274 * the data. The latter should only be performed once
277 if (rt2x00dev
->link
.ant
.flags
& ANTENNA_MODE_SAMPLE
)
278 rt2x00lib_evaluate_antenna_sample(rt2x00dev
);
279 else if (rt2x00dev
->link
.count
& 1)
280 rt2x00lib_evaluate_antenna_eval(rt2x00dev
);
283 static void rt2x00lib_update_link_stats(struct link
*link
, int rssi
)
290 if (link
->qual
.avg_rssi
)
291 avg_rssi
= MOVING_AVERAGE(link
->qual
.avg_rssi
, rssi
, 8);
292 link
->qual
.avg_rssi
= avg_rssi
;
295 * Update antenna RSSI
297 if (link
->ant
.rssi_ant
)
298 rssi
= MOVING_AVERAGE(link
->ant
.rssi_ant
, rssi
, 8);
299 link
->ant
.rssi_ant
= rssi
;
302 static void rt2x00lib_precalculate_link_signal(struct link_qual
*qual
)
304 if (qual
->rx_failed
|| qual
->rx_success
)
305 qual
->rx_percentage
=
306 (qual
->rx_success
* 100) /
307 (qual
->rx_failed
+ qual
->rx_success
);
309 qual
->rx_percentage
= 50;
311 if (qual
->tx_failed
|| qual
->tx_success
)
312 qual
->tx_percentage
=
313 (qual
->tx_success
* 100) /
314 (qual
->tx_failed
+ qual
->tx_success
);
316 qual
->tx_percentage
= 50;
318 qual
->rx_success
= 0;
320 qual
->tx_success
= 0;
324 static int rt2x00lib_calculate_link_signal(struct rt2x00_dev
*rt2x00dev
,
327 int rssi_percentage
= 0;
331 * We need a positive value for the RSSI.
334 rssi
+= rt2x00dev
->rssi_offset
;
337 * Calculate the different percentages,
338 * which will be used for the signal.
340 if (rt2x00dev
->rssi_offset
)
341 rssi_percentage
= (rssi
* 100) / rt2x00dev
->rssi_offset
;
344 * Add the individual percentages and use the WEIGHT
345 * defines to calculate the current link signal.
347 signal
= ((WEIGHT_RSSI
* rssi_percentage
) +
348 (WEIGHT_TX
* rt2x00dev
->link
.qual
.tx_percentage
) +
349 (WEIGHT_RX
* rt2x00dev
->link
.qual
.rx_percentage
)) / 100;
351 return (signal
> 100) ? 100 : signal
;
354 static void rt2x00lib_link_tuner(struct work_struct
*work
)
356 struct rt2x00_dev
*rt2x00dev
=
357 container_of(work
, struct rt2x00_dev
, link
.work
.work
);
360 * When the radio is shutting down we should
361 * immediately cease all link tuning.
363 if (!test_bit(DEVICE_ENABLED_RADIO
, &rt2x00dev
->flags
))
369 rt2x00dev
->ops
->lib
->link_stats(rt2x00dev
, &rt2x00dev
->link
.qual
);
370 rt2x00dev
->low_level_stats
.dot11FCSErrorCount
+=
371 rt2x00dev
->link
.qual
.rx_failed
;
374 * Only perform the link tuning when Link tuning
375 * has been enabled (This could have been disabled from the EEPROM).
377 if (!test_bit(CONFIG_DISABLE_LINK_TUNING
, &rt2x00dev
->flags
))
378 rt2x00dev
->ops
->lib
->link_tuner(rt2x00dev
);
381 * Precalculate a portion of the link signal which is
382 * in based on the tx/rx success/failure counters.
384 rt2x00lib_precalculate_link_signal(&rt2x00dev
->link
.qual
);
387 * Send a signal to the led to update the led signal strength.
389 rt2x00leds_led_quality(rt2x00dev
, rt2x00dev
->link
.qual
.avg_rssi
);
392 * Evaluate antenna setup, make this the last step since this could
393 * possibly reset some statistics.
395 rt2x00lib_evaluate_antenna(rt2x00dev
);
398 * Increase tuner counter, and reschedule the next link tuner run.
400 rt2x00dev
->link
.count
++;
401 queue_delayed_work(rt2x00dev
->hw
->workqueue
, &rt2x00dev
->link
.work
,
405 static void rt2x00lib_packetfilter_scheduled(struct work_struct
*work
)
407 struct rt2x00_dev
*rt2x00dev
=
408 container_of(work
, struct rt2x00_dev
, filter_work
);
410 rt2x00dev
->ops
->lib
->config_filter(rt2x00dev
, rt2x00dev
->packet_filter
);
413 static void rt2x00lib_intf_scheduled_iter(void *data
, u8
*mac
,
414 struct ieee80211_vif
*vif
)
416 struct rt2x00_dev
*rt2x00dev
= data
;
417 struct rt2x00_intf
*intf
= vif_to_intf(vif
);
419 struct ieee80211_tx_control control
;
420 struct ieee80211_bss_conf conf
;
424 * Copy all data we need during this action under the protection
425 * of a spinlock. Otherwise race conditions might occur which results
426 * into an invalid configuration.
428 spin_lock(&intf
->lock
);
430 memcpy(&conf
, &intf
->conf
, sizeof(conf
));
431 delayed_flags
= intf
->delayed_flags
;
432 intf
->delayed_flags
= 0;
434 spin_unlock(&intf
->lock
);
436 if (delayed_flags
& DELAYED_UPDATE_BEACON
) {
437 skb
= ieee80211_beacon_get(rt2x00dev
->hw
, vif
, &control
);
438 if (skb
&& rt2x00dev
->ops
->hw
->beacon_update(rt2x00dev
->hw
,
443 if (delayed_flags
& DELAYED_CONFIG_ERP
)
444 rt2x00lib_config_erp(rt2x00dev
, intf
, &intf
->conf
);
446 if (delayed_flags
& DELAYED_LED_ASSOC
)
447 rt2x00leds_led_assoc(rt2x00dev
, !!rt2x00dev
->intf_associated
);
450 static void rt2x00lib_intf_scheduled(struct work_struct
*work
)
452 struct rt2x00_dev
*rt2x00dev
=
453 container_of(work
, struct rt2x00_dev
, intf_work
);
456 * Iterate over each interface and perform the
457 * requested configurations.
459 ieee80211_iterate_active_interfaces(rt2x00dev
->hw
,
460 rt2x00lib_intf_scheduled_iter
,
465 * Interrupt context handlers.
467 static void rt2x00lib_beacondone_iter(void *data
, u8
*mac
,
468 struct ieee80211_vif
*vif
)
470 struct rt2x00_intf
*intf
= vif_to_intf(vif
);
472 if (vif
->type
!= IEEE80211_IF_TYPE_AP
&&
473 vif
->type
!= IEEE80211_IF_TYPE_IBSS
)
476 spin_lock(&intf
->lock
);
477 intf
->delayed_flags
|= DELAYED_UPDATE_BEACON
;
478 spin_unlock(&intf
->lock
);
481 void rt2x00lib_beacondone(struct rt2x00_dev
*rt2x00dev
)
483 if (!test_bit(DEVICE_ENABLED_RADIO
, &rt2x00dev
->flags
))
486 ieee80211_iterate_active_interfaces(rt2x00dev
->hw
,
487 rt2x00lib_beacondone_iter
,
490 queue_work(rt2x00dev
->hw
->workqueue
, &rt2x00dev
->intf_work
);
492 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone
);
494 void rt2x00lib_txdone(struct queue_entry
*entry
,
495 struct txdone_entry_desc
*txdesc
)
497 struct rt2x00_dev
*rt2x00dev
= entry
->queue
->rt2x00dev
;
498 struct skb_frame_desc
*skbdesc
;
499 struct ieee80211_tx_status tx_status
;
500 int success
= !!(txdesc
->status
== TX_SUCCESS
||
501 txdesc
->status
== TX_SUCCESS_RETRY
);
502 int fail
= !!(txdesc
->status
== TX_FAIL_RETRY
||
503 txdesc
->status
== TX_FAIL_INVALID
||
504 txdesc
->status
== TX_FAIL_OTHER
);
507 * Update TX statistics.
509 rt2x00dev
->link
.qual
.tx_success
+= success
;
510 rt2x00dev
->link
.qual
.tx_failed
+= txdesc
->retry
+ fail
;
513 * Initialize TX status
516 tx_status
.ack_signal
= 0;
517 tx_status
.excessive_retries
= (txdesc
->status
== TX_FAIL_RETRY
);
518 tx_status
.retry_count
= txdesc
->retry
;
519 memcpy(&tx_status
.control
, txdesc
->control
, sizeof(*txdesc
->control
));
521 if (!(tx_status
.control
.flags
& IEEE80211_TXCTL_NO_ACK
)) {
523 tx_status
.flags
|= IEEE80211_TX_STATUS_ACK
;
525 rt2x00dev
->low_level_stats
.dot11ACKFailureCount
++;
528 if (tx_status
.control
.flags
& IEEE80211_TXCTL_USE_RTS_CTS
) {
530 rt2x00dev
->low_level_stats
.dot11RTSSuccessCount
++;
532 rt2x00dev
->low_level_stats
.dot11RTSFailureCount
++;
536 * Send the tx_status to debugfs. Only send the status report
537 * to mac80211 when the frame originated from there. If this was
538 * a extra frame coming through a mac80211 library call (RTS/CTS)
539 * then we should not send the status report back.
540 * If send to mac80211, mac80211 will clean up the skb structure,
541 * otherwise we have to do it ourself.
543 skbdesc
= get_skb_frame_desc(entry
->skb
);
544 skbdesc
->frame_type
= DUMP_FRAME_TXDONE
;
546 rt2x00debug_dump_frame(rt2x00dev
, entry
->skb
);
548 if (!(skbdesc
->flags
& FRAME_DESC_DRIVER_GENERATED
))
549 ieee80211_tx_status_irqsafe(rt2x00dev
->hw
,
550 entry
->skb
, &tx_status
);
552 dev_kfree_skb(entry
->skb
);
555 EXPORT_SYMBOL_GPL(rt2x00lib_txdone
);
557 void rt2x00lib_rxdone(struct queue_entry
*entry
,
558 struct rxdone_entry_desc
*rxdesc
)
560 struct rt2x00_dev
*rt2x00dev
= entry
->queue
->rt2x00dev
;
561 struct ieee80211_rx_status
*rx_status
= &rt2x00dev
->rx_status
;
562 struct ieee80211_supported_band
*sband
;
563 struct ieee80211_hdr
*hdr
;
564 const struct rt2x00_rate
*rate
;
570 * Update RX statistics.
572 sband
= &rt2x00dev
->bands
[rt2x00dev
->curr_band
];
573 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
574 rate
= rt2x00_get_rate(sband
->bitrates
[i
].hw_value
);
576 if (((rxdesc
->dev_flags
& RXDONE_SIGNAL_PLCP
) &&
577 (rate
->plcp
== rxdesc
->signal
)) ||
578 (!(rxdesc
->dev_flags
& RXDONE_SIGNAL_PLCP
) &&
579 (rate
->bitrate
== rxdesc
->signal
))) {
586 WARNING(rt2x00dev
, "Frame received with unrecognized signal,"
587 "signal=0x%.2x, plcp=%d.\n", rxdesc
->signal
,
588 !!(rxdesc
->dev_flags
& RXDONE_SIGNAL_PLCP
));
593 * Only update link status if this is a beacon frame carrying our bssid.
595 hdr
= (struct ieee80211_hdr
*)entry
->skb
->data
;
596 fc
= le16_to_cpu(hdr
->frame_control
);
597 if (is_beacon(fc
) && (rxdesc
->dev_flags
& RXDONE_MY_BSS
))
598 rt2x00lib_update_link_stats(&rt2x00dev
->link
, rxdesc
->rssi
);
600 rt2x00dev
->link
.qual
.rx_success
++;
602 rx_status
->rate_idx
= idx
;
604 rt2x00lib_calculate_link_signal(rt2x00dev
, rxdesc
->rssi
);
605 rx_status
->ssi
= rxdesc
->rssi
;
606 rx_status
->flag
= rxdesc
->flags
;
607 rx_status
->antenna
= rt2x00dev
->link
.ant
.active
.rx
;
610 * Send frame to mac80211 & debugfs.
611 * mac80211 will clean up the skb structure.
613 get_skb_frame_desc(entry
->skb
)->frame_type
= DUMP_FRAME_RXDONE
;
614 rt2x00debug_dump_frame(rt2x00dev
, entry
->skb
);
615 ieee80211_rx_irqsafe(rt2x00dev
->hw
, entry
->skb
, rx_status
);
618 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone
);
621 * TX descriptor initializer
623 void rt2x00lib_write_tx_desc(struct rt2x00_dev
*rt2x00dev
,
625 struct ieee80211_tx_control
*control
)
627 struct txentry_desc txdesc
;
628 struct skb_frame_desc
*skbdesc
= get_skb_frame_desc(skb
);
629 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skbdesc
->data
;
630 const struct rt2x00_rate
*rate
;
638 memset(&txdesc
, 0, sizeof(txdesc
));
640 txdesc
.queue
= skbdesc
->entry
->queue
->qid
;
641 txdesc
.cw_min
= skbdesc
->entry
->queue
->cw_min
;
642 txdesc
.cw_max
= skbdesc
->entry
->queue
->cw_max
;
643 txdesc
.aifs
= skbdesc
->entry
->queue
->aifs
;
646 * Read required fields from ieee80211 header.
648 frame_control
= le16_to_cpu(hdr
->frame_control
);
649 seq_ctrl
= le16_to_cpu(hdr
->seq_ctrl
);
651 tx_rate
= control
->tx_rate
->hw_value
;
654 * Check whether this frame is to be acked
656 if (!(control
->flags
& IEEE80211_TXCTL_NO_ACK
))
657 __set_bit(ENTRY_TXD_ACK
, &txdesc
.flags
);
660 * Check if this is a RTS/CTS frame
662 if (is_rts_frame(frame_control
) || is_cts_frame(frame_control
)) {
663 __set_bit(ENTRY_TXD_BURST
, &txdesc
.flags
);
664 if (is_rts_frame(frame_control
)) {
665 __set_bit(ENTRY_TXD_RTS_FRAME
, &txdesc
.flags
);
666 __set_bit(ENTRY_TXD_ACK
, &txdesc
.flags
);
668 __clear_bit(ENTRY_TXD_ACK
, &txdesc
.flags
);
669 if (control
->rts_cts_rate
)
670 tx_rate
= control
->rts_cts_rate
->hw_value
;
673 rate
= rt2x00_get_rate(tx_rate
);
676 * Check if more fragments are pending
678 if (ieee80211_get_morefrag(hdr
)) {
679 __set_bit(ENTRY_TXD_BURST
, &txdesc
.flags
);
680 __set_bit(ENTRY_TXD_MORE_FRAG
, &txdesc
.flags
);
684 * Beacons and probe responses require the tsf timestamp
685 * to be inserted into the frame.
687 if (txdesc
.queue
== QID_BEACON
|| is_probe_resp(frame_control
))
688 __set_bit(ENTRY_TXD_REQ_TIMESTAMP
, &txdesc
.flags
);
691 * Determine with what IFS priority this frame should be send.
692 * Set ifs to IFS_SIFS when the this is not the first fragment,
693 * or this fragment came after RTS/CTS.
695 if ((seq_ctrl
& IEEE80211_SCTL_FRAG
) > 0 ||
696 test_bit(ENTRY_TXD_RTS_FRAME
, &txdesc
.flags
))
697 txdesc
.ifs
= IFS_SIFS
;
699 txdesc
.ifs
= IFS_BACKOFF
;
703 * Length calculation depends on OFDM/CCK rate.
705 txdesc
.signal
= rate
->plcp
;
706 txdesc
.service
= 0x04;
708 length
= skbdesc
->data_len
+ FCS_LEN
;
709 if (rate
->flags
& DEV_RATE_OFDM
) {
710 __set_bit(ENTRY_TXD_OFDM_RATE
, &txdesc
.flags
);
712 txdesc
.length_high
= (length
>> 6) & 0x3f;
713 txdesc
.length_low
= length
& 0x3f;
716 * Convert length to microseconds.
718 residual
= get_duration_res(length
, rate
->bitrate
);
719 duration
= get_duration(length
, rate
->bitrate
);
725 * Check if we need to set the Length Extension
727 if (rate
->bitrate
== 110 && residual
<= 30)
728 txdesc
.service
|= 0x80;
731 txdesc
.length_high
= (duration
>> 8) & 0xff;
732 txdesc
.length_low
= duration
& 0xff;
735 * When preamble is enabled we should set the
736 * preamble bit for the signal.
738 if (rt2x00_get_rate_preamble(tx_rate
))
739 txdesc
.signal
|= 0x08;
742 rt2x00dev
->ops
->lib
->write_tx_desc(rt2x00dev
, skb
, &txdesc
, control
);
745 * Update queue entry.
747 skbdesc
->entry
->skb
= skb
;
750 * The frame has been completely initialized and ready
751 * for sending to the device. The caller will push the
752 * frame to the device, but we are going to push the
753 * frame to debugfs here.
755 skbdesc
->frame_type
= DUMP_FRAME_TX
;
756 rt2x00debug_dump_frame(rt2x00dev
, skb
);
758 EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc
);
761 * Driver initialization handlers.
763 const struct rt2x00_rate rt2x00_supported_rates
[12] = {
765 .flags
= DEV_RATE_CCK
| DEV_RATE_BASIC
,
771 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
| DEV_RATE_BASIC
,
777 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
| DEV_RATE_BASIC
,
783 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
| DEV_RATE_BASIC
,
789 .flags
= DEV_RATE_OFDM
| DEV_RATE_BASIC
,
795 .flags
= DEV_RATE_OFDM
,
801 .flags
= DEV_RATE_OFDM
| DEV_RATE_BASIC
,
807 .flags
= DEV_RATE_OFDM
,
813 .flags
= DEV_RATE_OFDM
| DEV_RATE_BASIC
,
819 .flags
= DEV_RATE_OFDM
,
825 .flags
= DEV_RATE_OFDM
,
831 .flags
= DEV_RATE_OFDM
,
838 static void rt2x00lib_channel(struct ieee80211_channel
*entry
,
839 const int channel
, const int tx_power
,
842 entry
->center_freq
= ieee80211_channel_to_frequency(channel
);
843 entry
->hw_value
= value
;
844 entry
->max_power
= tx_power
;
845 entry
->max_antenna_gain
= 0xff;
848 static void rt2x00lib_rate(struct ieee80211_rate
*entry
,
849 const u16 index
, const struct rt2x00_rate
*rate
)
852 entry
->bitrate
= rate
->bitrate
;
853 entry
->hw_value
= rt2x00_create_rate_hw_value(index
, 0);
854 entry
->hw_value_short
= entry
->hw_value
;
856 if (rate
->flags
& DEV_RATE_SHORT_PREAMBLE
) {
857 entry
->flags
|= IEEE80211_RATE_SHORT_PREAMBLE
;
858 entry
->hw_value_short
|= rt2x00_create_rate_hw_value(index
, 1);
862 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev
*rt2x00dev
,
863 struct hw_mode_spec
*spec
)
865 struct ieee80211_hw
*hw
= rt2x00dev
->hw
;
866 struct ieee80211_channel
*channels
;
867 struct ieee80211_rate
*rates
;
868 unsigned int num_rates
;
870 unsigned char tx_power
;
873 if (spec
->supported_rates
& SUPPORT_RATE_CCK
)
875 if (spec
->supported_rates
& SUPPORT_RATE_OFDM
)
878 channels
= kzalloc(sizeof(*channels
) * spec
->num_channels
, GFP_KERNEL
);
882 rates
= kzalloc(sizeof(*rates
) * num_rates
, GFP_KERNEL
);
884 goto exit_free_channels
;
887 * Initialize Rate list.
889 for (i
= 0; i
< num_rates
; i
++)
890 rt2x00lib_rate(&rates
[i
], i
, rt2x00_get_rate(i
));
893 * Initialize Channel list.
895 for (i
= 0; i
< spec
->num_channels
; i
++) {
896 if (spec
->channels
[i
].channel
<= 14) {
897 if (spec
->tx_power_bg
)
898 tx_power
= spec
->tx_power_bg
[i
];
900 tx_power
= spec
->tx_power_default
;
902 if (spec
->tx_power_a
)
903 tx_power
= spec
->tx_power_a
[i
];
905 tx_power
= spec
->tx_power_default
;
908 rt2x00lib_channel(&channels
[i
],
909 spec
->channels
[i
].channel
, tx_power
, i
);
913 * Intitialize 802.11b, 802.11g
917 if (spec
->supported_bands
& SUPPORT_BAND_2GHZ
) {
918 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].n_channels
= 14;
919 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].n_bitrates
= num_rates
;
920 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].channels
= channels
;
921 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].bitrates
= rates
;
922 hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
] =
923 &rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
];
927 * Intitialize 802.11a
929 * Channels: OFDM, UNII, HiperLAN2.
931 if (spec
->supported_bands
& SUPPORT_BAND_5GHZ
) {
932 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].n_channels
=
933 spec
->num_channels
- 14;
934 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].n_bitrates
=
936 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].channels
= &channels
[14];
937 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].bitrates
= &rates
[4];
938 hw
->wiphy
->bands
[IEEE80211_BAND_5GHZ
] =
939 &rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
];
946 ERROR(rt2x00dev
, "Allocation ieee80211 modes failed.\n");
950 static void rt2x00lib_remove_hw(struct rt2x00_dev
*rt2x00dev
)
952 if (test_bit(DEVICE_REGISTERED_HW
, &rt2x00dev
->flags
))
953 ieee80211_unregister_hw(rt2x00dev
->hw
);
955 if (likely(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
])) {
956 kfree(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
]->channels
);
957 kfree(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
]->bitrates
);
958 rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
] = NULL
;
959 rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_5GHZ
] = NULL
;
963 static int rt2x00lib_probe_hw(struct rt2x00_dev
*rt2x00dev
)
965 struct hw_mode_spec
*spec
= &rt2x00dev
->spec
;
969 * Initialize HW modes.
971 status
= rt2x00lib_probe_hw_modes(rt2x00dev
, spec
);
978 status
= ieee80211_register_hw(rt2x00dev
->hw
);
980 rt2x00lib_remove_hw(rt2x00dev
);
984 __set_bit(DEVICE_REGISTERED_HW
, &rt2x00dev
->flags
);
990 * Initialization/uninitialization handlers.
992 static void rt2x00lib_uninitialize(struct rt2x00_dev
*rt2x00dev
)
994 if (!__test_and_clear_bit(DEVICE_INITIALIZED
, &rt2x00dev
->flags
))
998 * Unregister extra components.
1000 rt2x00rfkill_unregister(rt2x00dev
);
1003 * Allow the HW to uninitialize.
1005 rt2x00dev
->ops
->lib
->uninitialize(rt2x00dev
);
1008 * Free allocated queue entries.
1010 rt2x00queue_uninitialize(rt2x00dev
);
1013 static int rt2x00lib_initialize(struct rt2x00_dev
*rt2x00dev
)
1017 if (test_bit(DEVICE_INITIALIZED
, &rt2x00dev
->flags
))
1021 * Allocate all queue entries.
1023 status
= rt2x00queue_initialize(rt2x00dev
);
1028 * Initialize the device.
1030 status
= rt2x00dev
->ops
->lib
->initialize(rt2x00dev
);
1032 rt2x00queue_uninitialize(rt2x00dev
);
1036 __set_bit(DEVICE_INITIALIZED
, &rt2x00dev
->flags
);
1039 * Register the extra components.
1041 rt2x00rfkill_register(rt2x00dev
);
1046 int rt2x00lib_start(struct rt2x00_dev
*rt2x00dev
)
1050 if (test_bit(DEVICE_STARTED
, &rt2x00dev
->flags
))
1054 * If this is the first interface which is added,
1055 * we should load the firmware now.
1057 retval
= rt2x00lib_load_firmware(rt2x00dev
);
1062 * Initialize the device.
1064 retval
= rt2x00lib_initialize(rt2x00dev
);
1071 retval
= rt2x00lib_enable_radio(rt2x00dev
);
1073 rt2x00lib_uninitialize(rt2x00dev
);
1077 rt2x00dev
->intf_ap_count
= 0;
1078 rt2x00dev
->intf_sta_count
= 0;
1079 rt2x00dev
->intf_associated
= 0;
1081 __set_bit(DEVICE_STARTED
, &rt2x00dev
->flags
);
1086 void rt2x00lib_stop(struct rt2x00_dev
*rt2x00dev
)
1088 if (!test_bit(DEVICE_STARTED
, &rt2x00dev
->flags
))
1092 * Perhaps we can add something smarter here,
1093 * but for now just disabling the radio should do.
1095 rt2x00lib_disable_radio(rt2x00dev
);
1097 rt2x00dev
->intf_ap_count
= 0;
1098 rt2x00dev
->intf_sta_count
= 0;
1099 rt2x00dev
->intf_associated
= 0;
1101 __clear_bit(DEVICE_STARTED
, &rt2x00dev
->flags
);
1105 * driver allocation handlers.
1107 int rt2x00lib_probe_dev(struct rt2x00_dev
*rt2x00dev
)
1109 int retval
= -ENOMEM
;
1112 * Make room for rt2x00_intf inside the per-interface
1113 * structure ieee80211_vif.
1115 rt2x00dev
->hw
->vif_data_size
= sizeof(struct rt2x00_intf
);
1118 * Let the driver probe the device to detect the capabilities.
1120 retval
= rt2x00dev
->ops
->lib
->probe_hw(rt2x00dev
);
1122 ERROR(rt2x00dev
, "Failed to allocate device.\n");
1127 * Initialize configuration work.
1129 INIT_WORK(&rt2x00dev
->intf_work
, rt2x00lib_intf_scheduled
);
1130 INIT_WORK(&rt2x00dev
->filter_work
, rt2x00lib_packetfilter_scheduled
);
1131 INIT_DELAYED_WORK(&rt2x00dev
->link
.work
, rt2x00lib_link_tuner
);
1134 * Allocate queue array.
1136 retval
= rt2x00queue_allocate(rt2x00dev
);
1141 * Initialize ieee80211 structure.
1143 retval
= rt2x00lib_probe_hw(rt2x00dev
);
1145 ERROR(rt2x00dev
, "Failed to initialize hw.\n");
1150 * Register extra components.
1152 rt2x00leds_register(rt2x00dev
);
1153 rt2x00rfkill_allocate(rt2x00dev
);
1154 rt2x00debug_register(rt2x00dev
);
1156 __set_bit(DEVICE_PRESENT
, &rt2x00dev
->flags
);
1161 rt2x00lib_remove_dev(rt2x00dev
);
1165 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev
);
1167 void rt2x00lib_remove_dev(struct rt2x00_dev
*rt2x00dev
)
1169 __clear_bit(DEVICE_PRESENT
, &rt2x00dev
->flags
);
1174 rt2x00lib_disable_radio(rt2x00dev
);
1177 * Uninitialize device.
1179 rt2x00lib_uninitialize(rt2x00dev
);
1182 * Free extra components
1184 rt2x00debug_deregister(rt2x00dev
);
1185 rt2x00rfkill_free(rt2x00dev
);
1186 rt2x00leds_unregister(rt2x00dev
);
1189 * Free ieee80211_hw memory.
1191 rt2x00lib_remove_hw(rt2x00dev
);
1194 * Free firmware image.
1196 rt2x00lib_free_firmware(rt2x00dev
);
1199 * Free queue structures.
1201 rt2x00queue_free(rt2x00dev
);
1203 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev
);
1206 * Device state handlers
1209 int rt2x00lib_suspend(struct rt2x00_dev
*rt2x00dev
, pm_message_t state
)
1213 NOTICE(rt2x00dev
, "Going to sleep.\n");
1214 __clear_bit(DEVICE_PRESENT
, &rt2x00dev
->flags
);
1217 * Only continue if mac80211 has open interfaces.
1219 if (!test_bit(DEVICE_STARTED
, &rt2x00dev
->flags
))
1221 __set_bit(DEVICE_STARTED_SUSPEND
, &rt2x00dev
->flags
);
1226 rt2x00lib_stop(rt2x00dev
);
1227 rt2x00lib_uninitialize(rt2x00dev
);
1230 * Suspend/disable extra components.
1232 rt2x00leds_suspend(rt2x00dev
);
1233 rt2x00rfkill_suspend(rt2x00dev
);
1234 rt2x00debug_deregister(rt2x00dev
);
1238 * Set device mode to sleep for power management,
1239 * on some hardware this call seems to consistently fail.
1240 * From the specifications it is hard to tell why it fails,
1241 * and if this is a "bad thing".
1242 * Overall it is safe to just ignore the failure and
1243 * continue suspending. The only downside is that the
1244 * device will not be in optimal power save mode, but with
1245 * the radio and the other components already disabled the
1246 * device is as good as disabled.
1248 retval
= rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_SLEEP
);
1250 WARNING(rt2x00dev
, "Device failed to enter sleep state, "
1251 "continue suspending.\n");
1255 EXPORT_SYMBOL_GPL(rt2x00lib_suspend
);
1257 static void rt2x00lib_resume_intf(void *data
, u8
*mac
,
1258 struct ieee80211_vif
*vif
)
1260 struct rt2x00_dev
*rt2x00dev
= data
;
1261 struct rt2x00_intf
*intf
= vif_to_intf(vif
);
1263 spin_lock(&intf
->lock
);
1265 rt2x00lib_config_intf(rt2x00dev
, intf
,
1266 vif
->type
, intf
->mac
, intf
->bssid
);
1270 * Master or Ad-hoc mode require a new beacon update.
1272 if (vif
->type
== IEEE80211_IF_TYPE_AP
||
1273 vif
->type
== IEEE80211_IF_TYPE_IBSS
)
1274 intf
->delayed_flags
|= DELAYED_UPDATE_BEACON
;
1276 spin_unlock(&intf
->lock
);
1279 int rt2x00lib_resume(struct rt2x00_dev
*rt2x00dev
)
1283 NOTICE(rt2x00dev
, "Waking up.\n");
1286 * Restore/enable extra components.
1288 rt2x00debug_register(rt2x00dev
);
1289 rt2x00rfkill_resume(rt2x00dev
);
1290 rt2x00leds_resume(rt2x00dev
);
1293 * Only continue if mac80211 had open interfaces.
1295 if (!__test_and_clear_bit(DEVICE_STARTED_SUSPEND
, &rt2x00dev
->flags
))
1299 * Reinitialize device and all active interfaces.
1301 retval
= rt2x00lib_start(rt2x00dev
);
1306 * Reconfigure device.
1308 rt2x00lib_config(rt2x00dev
, &rt2x00dev
->hw
->conf
, 1);
1309 if (!rt2x00dev
->hw
->conf
.radio_enabled
)
1310 rt2x00lib_disable_radio(rt2x00dev
);
1313 * Iterator over each active interface to
1314 * reconfigure the hardware.
1316 ieee80211_iterate_active_interfaces(rt2x00dev
->hw
,
1317 rt2x00lib_resume_intf
, rt2x00dev
);
1320 * We are ready again to receive requests from mac80211.
1322 __set_bit(DEVICE_PRESENT
, &rt2x00dev
->flags
);
1325 * It is possible that during that mac80211 has attempted
1326 * to send frames while we were suspending or resuming.
1327 * In that case we have disabled the TX queue and should
1328 * now enable it again
1330 ieee80211_start_queues(rt2x00dev
->hw
);
1333 * During interface iteration we might have changed the
1334 * delayed_flags, time to handles the event by calling
1335 * the work handler directly.
1337 rt2x00lib_intf_scheduled(&rt2x00dev
->intf_work
);
1342 rt2x00lib_disable_radio(rt2x00dev
);
1343 rt2x00lib_uninitialize(rt2x00dev
);
1344 rt2x00debug_deregister(rt2x00dev
);
1348 EXPORT_SYMBOL_GPL(rt2x00lib_resume
);
1349 #endif /* CONFIG_PM */
1352 * rt2x00lib module information.
1354 MODULE_AUTHOR(DRV_PROJECT
);
1355 MODULE_VERSION(DRV_VERSION
);
1356 MODULE_DESCRIPTION("rt2x00 library");
1357 MODULE_LICENSE("GPL");