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
);
111 status
= rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
,
116 __set_bit(DEVICE_ENABLED_RADIO
, &rt2x00dev
->flags
);
121 rt2x00lib_toggle_rx(rt2x00dev
, STATE_RADIO_RX_ON
);
124 * Start the TX queues.
126 ieee80211_start_queues(rt2x00dev
->hw
);
131 void rt2x00lib_disable_radio(struct rt2x00_dev
*rt2x00dev
)
133 if (!__test_and_clear_bit(DEVICE_ENABLED_RADIO
, &rt2x00dev
->flags
))
137 * Stop all scheduled work.
139 if (work_pending(&rt2x00dev
->intf_work
))
140 cancel_work_sync(&rt2x00dev
->intf_work
);
141 if (work_pending(&rt2x00dev
->filter_work
))
142 cancel_work_sync(&rt2x00dev
->filter_work
);
145 * Stop the TX queues.
147 ieee80211_stop_queues(rt2x00dev
->hw
);
152 rt2x00lib_toggle_rx(rt2x00dev
, STATE_RADIO_RX_OFF
);
157 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_OFF
);
160 void rt2x00lib_toggle_rx(struct rt2x00_dev
*rt2x00dev
, enum dev_state state
)
163 * When we are disabling the RX, we should also stop the link tuner.
165 if (state
== STATE_RADIO_RX_OFF
)
166 rt2x00lib_stop_link_tuner(rt2x00dev
);
168 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, state
);
171 * When we are enabling the RX, we should also start the link tuner.
173 if (state
== STATE_RADIO_RX_ON
&&
174 (rt2x00dev
->intf_ap_count
|| rt2x00dev
->intf_sta_count
))
175 rt2x00lib_start_link_tuner(rt2x00dev
);
178 static void rt2x00lib_evaluate_antenna_sample(struct rt2x00_dev
*rt2x00dev
)
180 enum antenna rx
= rt2x00dev
->link
.ant
.active
.rx
;
181 enum antenna tx
= rt2x00dev
->link
.ant
.active
.tx
;
183 rt2x00_get_link_ant_rssi_history(&rt2x00dev
->link
, ANTENNA_A
);
185 rt2x00_get_link_ant_rssi_history(&rt2x00dev
->link
, ANTENNA_B
);
188 * We are done sampling. Now we should evaluate the results.
190 rt2x00dev
->link
.ant
.flags
&= ~ANTENNA_MODE_SAMPLE
;
193 * During the last period we have sampled the RSSI
194 * from both antenna's. It now is time to determine
195 * which antenna demonstrated the best performance.
196 * When we are already on the antenna with the best
197 * performance, then there really is nothing for us
200 if (sample_a
== sample_b
)
203 if (rt2x00dev
->link
.ant
.flags
& ANTENNA_RX_DIVERSITY
)
204 rx
= (sample_a
> sample_b
) ? ANTENNA_A
: ANTENNA_B
;
206 if (rt2x00dev
->link
.ant
.flags
& ANTENNA_TX_DIVERSITY
)
207 tx
= (sample_a
> sample_b
) ? ANTENNA_A
: ANTENNA_B
;
209 rt2x00lib_config_antenna(rt2x00dev
, rx
, tx
);
212 static void rt2x00lib_evaluate_antenna_eval(struct rt2x00_dev
*rt2x00dev
)
214 enum antenna rx
= rt2x00dev
->link
.ant
.active
.rx
;
215 enum antenna tx
= rt2x00dev
->link
.ant
.active
.tx
;
216 int rssi_curr
= rt2x00_get_link_ant_rssi(&rt2x00dev
->link
);
217 int rssi_old
= rt2x00_update_ant_rssi(&rt2x00dev
->link
, rssi_curr
);
220 * Legacy driver indicates that we should swap antenna's
221 * when the difference in RSSI is greater that 5. This
222 * also should be done when the RSSI was actually better
223 * then the previous sample.
224 * When the difference exceeds the threshold we should
225 * sample the rssi from the other antenna to make a valid
226 * comparison between the 2 antennas.
228 if (abs(rssi_curr
- rssi_old
) < 5)
231 rt2x00dev
->link
.ant
.flags
|= ANTENNA_MODE_SAMPLE
;
233 if (rt2x00dev
->link
.ant
.flags
& ANTENNA_RX_DIVERSITY
)
234 rx
= (rx
== ANTENNA_A
) ? ANTENNA_B
: ANTENNA_A
;
236 if (rt2x00dev
->link
.ant
.flags
& ANTENNA_TX_DIVERSITY
)
237 tx
= (tx
== ANTENNA_A
) ? ANTENNA_B
: ANTENNA_A
;
239 rt2x00lib_config_antenna(rt2x00dev
, rx
, tx
);
242 static void rt2x00lib_evaluate_antenna(struct rt2x00_dev
*rt2x00dev
)
245 * Determine if software diversity is enabled for
246 * either the TX or RX antenna (or both).
247 * Always perform this check since within the link
248 * tuner interval the configuration might have changed.
250 rt2x00dev
->link
.ant
.flags
&= ~ANTENNA_RX_DIVERSITY
;
251 rt2x00dev
->link
.ant
.flags
&= ~ANTENNA_TX_DIVERSITY
;
253 if (rt2x00dev
->hw
->conf
.antenna_sel_rx
== 0 &&
254 rt2x00dev
->default_ant
.rx
== ANTENNA_SW_DIVERSITY
)
255 rt2x00dev
->link
.ant
.flags
|= ANTENNA_RX_DIVERSITY
;
256 if (rt2x00dev
->hw
->conf
.antenna_sel_tx
== 0 &&
257 rt2x00dev
->default_ant
.tx
== ANTENNA_SW_DIVERSITY
)
258 rt2x00dev
->link
.ant
.flags
|= ANTENNA_TX_DIVERSITY
;
260 if (!(rt2x00dev
->link
.ant
.flags
& ANTENNA_RX_DIVERSITY
) &&
261 !(rt2x00dev
->link
.ant
.flags
& ANTENNA_TX_DIVERSITY
)) {
262 rt2x00dev
->link
.ant
.flags
= 0;
267 * If we have only sampled the data over the last period
268 * we should now harvest the data. Otherwise just evaluate
269 * the data. The latter should only be performed once
272 if (rt2x00dev
->link
.ant
.flags
& ANTENNA_MODE_SAMPLE
)
273 rt2x00lib_evaluate_antenna_sample(rt2x00dev
);
274 else if (rt2x00dev
->link
.count
& 1)
275 rt2x00lib_evaluate_antenna_eval(rt2x00dev
);
278 static void rt2x00lib_update_link_stats(struct link
*link
, int rssi
)
285 if (link
->qual
.avg_rssi
)
286 avg_rssi
= MOVING_AVERAGE(link
->qual
.avg_rssi
, rssi
, 8);
287 link
->qual
.avg_rssi
= avg_rssi
;
290 * Update antenna RSSI
292 if (link
->ant
.rssi_ant
)
293 rssi
= MOVING_AVERAGE(link
->ant
.rssi_ant
, rssi
, 8);
294 link
->ant
.rssi_ant
= rssi
;
297 static void rt2x00lib_precalculate_link_signal(struct link_qual
*qual
)
299 if (qual
->rx_failed
|| qual
->rx_success
)
300 qual
->rx_percentage
=
301 (qual
->rx_success
* 100) /
302 (qual
->rx_failed
+ qual
->rx_success
);
304 qual
->rx_percentage
= 50;
306 if (qual
->tx_failed
|| qual
->tx_success
)
307 qual
->tx_percentage
=
308 (qual
->tx_success
* 100) /
309 (qual
->tx_failed
+ qual
->tx_success
);
311 qual
->tx_percentage
= 50;
313 qual
->rx_success
= 0;
315 qual
->tx_success
= 0;
319 static int rt2x00lib_calculate_link_signal(struct rt2x00_dev
*rt2x00dev
,
322 int rssi_percentage
= 0;
326 * We need a positive value for the RSSI.
329 rssi
+= rt2x00dev
->rssi_offset
;
332 * Calculate the different percentages,
333 * which will be used for the signal.
335 if (rt2x00dev
->rssi_offset
)
336 rssi_percentage
= (rssi
* 100) / rt2x00dev
->rssi_offset
;
339 * Add the individual percentages and use the WEIGHT
340 * defines to calculate the current link signal.
342 signal
= ((WEIGHT_RSSI
* rssi_percentage
) +
343 (WEIGHT_TX
* rt2x00dev
->link
.qual
.tx_percentage
) +
344 (WEIGHT_RX
* rt2x00dev
->link
.qual
.rx_percentage
)) / 100;
346 return (signal
> 100) ? 100 : signal
;
349 static void rt2x00lib_link_tuner(struct work_struct
*work
)
351 struct rt2x00_dev
*rt2x00dev
=
352 container_of(work
, struct rt2x00_dev
, link
.work
.work
);
355 * When the radio is shutting down we should
356 * immediately cease all link tuning.
358 if (!test_bit(DEVICE_ENABLED_RADIO
, &rt2x00dev
->flags
))
364 rt2x00dev
->ops
->lib
->link_stats(rt2x00dev
, &rt2x00dev
->link
.qual
);
365 rt2x00dev
->low_level_stats
.dot11FCSErrorCount
+=
366 rt2x00dev
->link
.qual
.rx_failed
;
369 * Only perform the link tuning when Link tuning
370 * has been enabled (This could have been disabled from the EEPROM).
372 if (!test_bit(CONFIG_DISABLE_LINK_TUNING
, &rt2x00dev
->flags
))
373 rt2x00dev
->ops
->lib
->link_tuner(rt2x00dev
);
376 * Precalculate a portion of the link signal which is
377 * in based on the tx/rx success/failure counters.
379 rt2x00lib_precalculate_link_signal(&rt2x00dev
->link
.qual
);
382 * Evaluate antenna setup, make this the last step since this could
383 * possibly reset some statistics.
385 rt2x00lib_evaluate_antenna(rt2x00dev
);
388 * Increase tuner counter, and reschedule the next link tuner run.
390 rt2x00dev
->link
.count
++;
391 queue_delayed_work(rt2x00dev
->hw
->workqueue
, &rt2x00dev
->link
.work
,
395 static void rt2x00lib_packetfilter_scheduled(struct work_struct
*work
)
397 struct rt2x00_dev
*rt2x00dev
=
398 container_of(work
, struct rt2x00_dev
, filter_work
);
399 unsigned int filter
= rt2x00dev
->packet_filter
;
402 * Since we had stored the filter inside rt2x00dev->packet_filter,
403 * we should now clear that field. Otherwise the driver will
404 * assume nothing has changed (*total_flags will be compared
405 * to rt2x00dev->packet_filter to determine if any action is required).
407 rt2x00dev
->packet_filter
= 0;
409 rt2x00dev
->ops
->hw
->configure_filter(rt2x00dev
->hw
,
410 filter
, &filter
, 0, NULL
);
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
);
439 rt2x00dev
->ops
->hw
->beacon_update(rt2x00dev
->hw
, skb
,
445 if (delayed_flags
& DELAYED_CONFIG_PREAMBLE
)
446 rt2x00lib_config_preamble(rt2x00dev
, intf
,
447 intf
->conf
.use_short_preamble
);
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 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 tx_status
.queue_length
= entry
->queue
->limit
;
528 tx_status
.queue_number
= tx_status
.control
.queue
;
530 if (tx_status
.control
.flags
& IEEE80211_TXCTL_USE_RTS_CTS
) {
532 rt2x00dev
->low_level_stats
.dot11RTSSuccessCount
++;
534 rt2x00dev
->low_level_stats
.dot11RTSFailureCount
++;
538 * Send the tx_status to mac80211 & debugfs.
539 * mac80211 will clean up the skb structure.
541 get_skb_frame_desc(entry
->skb
)->frame_type
= DUMP_FRAME_TXDONE
;
542 rt2x00debug_dump_frame(rt2x00dev
, entry
->skb
);
543 ieee80211_tx_status_irqsafe(rt2x00dev
->hw
, entry
->skb
, &tx_status
);
546 EXPORT_SYMBOL_GPL(rt2x00lib_txdone
);
548 void rt2x00lib_rxdone(struct queue_entry
*entry
,
549 struct rxdone_entry_desc
*rxdesc
)
551 struct rt2x00_dev
*rt2x00dev
= entry
->queue
->rt2x00dev
;
552 struct ieee80211_rx_status
*rx_status
= &rt2x00dev
->rx_status
;
553 struct ieee80211_supported_band
*sband
;
554 struct ieee80211_hdr
*hdr
;
555 const struct rt2x00_rate
*rate
;
561 * Update RX statistics.
563 sband
= &rt2x00dev
->bands
[rt2x00dev
->curr_band
];
564 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
565 rate
= rt2x00_get_rate(sband
->bitrates
[i
].hw_value
);
568 * When frame was received with an OFDM bitrate,
569 * the signal is the PLCP value. If it was received with
570 * a CCK bitrate the signal is the rate in 100kbit/s.
572 if ((rxdesc
->ofdm
&& rate
->plcp
== rxdesc
->signal
) ||
573 (!rxdesc
->ofdm
&& rate
->bitrate
== rxdesc
->signal
)) {
580 * Only update link status if this is a beacon frame carrying our bssid.
582 hdr
= (struct ieee80211_hdr
*)entry
->skb
->data
;
583 fc
= le16_to_cpu(hdr
->frame_control
);
584 if (is_beacon(fc
) && rxdesc
->my_bss
)
585 rt2x00lib_update_link_stats(&rt2x00dev
->link
, rxdesc
->rssi
);
587 rt2x00dev
->link
.qual
.rx_success
++;
589 rx_status
->rate_idx
= idx
;
591 rt2x00lib_calculate_link_signal(rt2x00dev
, rxdesc
->rssi
);
592 rx_status
->ssi
= rxdesc
->rssi
;
593 rx_status
->flag
= rxdesc
->flags
;
594 rx_status
->antenna
= rt2x00dev
->link
.ant
.active
.rx
;
597 * Send frame to mac80211 & debugfs.
598 * mac80211 will clean up the skb structure.
600 get_skb_frame_desc(entry
->skb
)->frame_type
= DUMP_FRAME_RXDONE
;
601 rt2x00debug_dump_frame(rt2x00dev
, entry
->skb
);
602 ieee80211_rx_irqsafe(rt2x00dev
->hw
, entry
->skb
, rx_status
);
605 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone
);
608 * TX descriptor initializer
610 void rt2x00lib_write_tx_desc(struct rt2x00_dev
*rt2x00dev
,
612 struct ieee80211_tx_control
*control
)
614 struct txentry_desc txdesc
;
615 struct skb_frame_desc
*skbdesc
= get_skb_frame_desc(skb
);
616 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
617 const struct rt2x00_rate
*rate
;
625 memset(&txdesc
, 0, sizeof(txdesc
));
627 txdesc
.queue
= skbdesc
->entry
->queue
->qid
;
628 txdesc
.cw_min
= skbdesc
->entry
->queue
->cw_min
;
629 txdesc
.cw_max
= skbdesc
->entry
->queue
->cw_max
;
630 txdesc
.aifs
= skbdesc
->entry
->queue
->aifs
;
633 * Read required fields from ieee80211 header.
635 frame_control
= le16_to_cpu(hdr
->frame_control
);
636 seq_ctrl
= le16_to_cpu(hdr
->seq_ctrl
);
638 tx_rate
= control
->tx_rate
->hw_value
;
641 * Check whether this frame is to be acked
643 if (!(control
->flags
& IEEE80211_TXCTL_NO_ACK
))
644 __set_bit(ENTRY_TXD_ACK
, &txdesc
.flags
);
647 * Check if this is a RTS/CTS frame
649 if (is_rts_frame(frame_control
) || is_cts_frame(frame_control
)) {
650 __set_bit(ENTRY_TXD_BURST
, &txdesc
.flags
);
651 if (is_rts_frame(frame_control
)) {
652 __set_bit(ENTRY_TXD_RTS_FRAME
, &txdesc
.flags
);
653 __set_bit(ENTRY_TXD_ACK
, &txdesc
.flags
);
655 __clear_bit(ENTRY_TXD_ACK
, &txdesc
.flags
);
656 if (control
->rts_cts_rate
)
657 tx_rate
= control
->rts_cts_rate
->hw_value
;
660 rate
= rt2x00_get_rate(tx_rate
);
663 * Check if more fragments are pending
665 if (ieee80211_get_morefrag(hdr
)) {
666 __set_bit(ENTRY_TXD_BURST
, &txdesc
.flags
);
667 __set_bit(ENTRY_TXD_MORE_FRAG
, &txdesc
.flags
);
671 * Beacons and probe responses require the tsf timestamp
672 * to be inserted into the frame.
674 if (control
->queue
== RT2X00_BCN_QUEUE_BEACON
||
675 is_probe_resp(frame_control
))
676 __set_bit(ENTRY_TXD_REQ_TIMESTAMP
, &txdesc
.flags
);
679 * Determine with what IFS priority this frame should be send.
680 * Set ifs to IFS_SIFS when the this is not the first fragment,
681 * or this fragment came after RTS/CTS.
683 if ((seq_ctrl
& IEEE80211_SCTL_FRAG
) > 0 ||
684 test_bit(ENTRY_TXD_RTS_FRAME
, &txdesc
.flags
))
685 txdesc
.ifs
= IFS_SIFS
;
687 txdesc
.ifs
= IFS_BACKOFF
;
691 * Length calculation depends on OFDM/CCK rate.
693 txdesc
.signal
= rate
->plcp
;
694 txdesc
.service
= 0x04;
696 length
= skb
->len
+ FCS_LEN
;
697 if (rate
->flags
& DEV_RATE_OFDM
) {
698 __set_bit(ENTRY_TXD_OFDM_RATE
, &txdesc
.flags
);
700 txdesc
.length_high
= (length
>> 6) & 0x3f;
701 txdesc
.length_low
= length
& 0x3f;
704 * Convert length to microseconds.
706 residual
= get_duration_res(length
, rate
->bitrate
);
707 duration
= get_duration(length
, rate
->bitrate
);
713 * Check if we need to set the Length Extension
715 if (rate
->bitrate
== 110 && residual
<= 30)
716 txdesc
.service
|= 0x80;
719 txdesc
.length_high
= (duration
>> 8) & 0xff;
720 txdesc
.length_low
= duration
& 0xff;
723 * When preamble is enabled we should set the
724 * preamble bit for the signal.
726 if (rt2x00_get_rate_preamble(tx_rate
))
727 txdesc
.signal
|= 0x08;
730 rt2x00dev
->ops
->lib
->write_tx_desc(rt2x00dev
, skb
, &txdesc
, control
);
733 * Update queue entry.
735 skbdesc
->entry
->skb
= skb
;
738 * The frame has been completely initialized and ready
739 * for sending to the device. The caller will push the
740 * frame to the device, but we are going to push the
741 * frame to debugfs here.
743 skbdesc
->frame_type
= DUMP_FRAME_TX
;
744 rt2x00debug_dump_frame(rt2x00dev
, skb
);
746 EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc
);
749 * Driver initialization handlers.
751 const struct rt2x00_rate rt2x00_supported_rates
[12] = {
755 .ratemask
= DEV_RATEMASK_1MB
,
759 .flags
= DEV_RATE_SHORT_PREAMBLE
,
761 .ratemask
= DEV_RATEMASK_2MB
,
765 .flags
= DEV_RATE_SHORT_PREAMBLE
,
767 .ratemask
= DEV_RATEMASK_5_5MB
,
771 .flags
= DEV_RATE_SHORT_PREAMBLE
,
773 .ratemask
= DEV_RATEMASK_11MB
,
777 .flags
= DEV_RATE_OFDM
,
779 .ratemask
= DEV_RATEMASK_6MB
,
783 .flags
= DEV_RATE_OFDM
,
785 .ratemask
= DEV_RATEMASK_9MB
,
789 .flags
= DEV_RATE_OFDM
,
791 .ratemask
= DEV_RATEMASK_12MB
,
795 .flags
= DEV_RATE_OFDM
,
797 .ratemask
= DEV_RATEMASK_18MB
,
801 .flags
= DEV_RATE_OFDM
,
803 .ratemask
= DEV_RATEMASK_24MB
,
807 .flags
= DEV_RATE_OFDM
,
809 .ratemask
= DEV_RATEMASK_36MB
,
813 .flags
= DEV_RATE_OFDM
,
815 .ratemask
= DEV_RATEMASK_48MB
,
819 .flags
= DEV_RATE_OFDM
,
821 .ratemask
= DEV_RATEMASK_54MB
,
826 static void rt2x00lib_channel(struct ieee80211_channel
*entry
,
827 const int channel
, const int tx_power
,
831 entry
->center_freq
= 2407 + (5 * channel
);
833 entry
->center_freq
= 5000 + (5 * channel
);
834 entry
->hw_value
= value
;
835 entry
->max_power
= tx_power
;
836 entry
->max_antenna_gain
= 0xff;
839 static void rt2x00lib_rate(struct ieee80211_rate
*entry
,
840 const u16 index
, const struct rt2x00_rate
*rate
)
843 entry
->bitrate
= rate
->bitrate
;
844 entry
->hw_value
= rt2x00_create_rate_hw_value(index
, 0);
845 entry
->hw_value_short
= entry
->hw_value
;
847 if (rate
->flags
& DEV_RATE_SHORT_PREAMBLE
) {
848 entry
->flags
|= IEEE80211_RATE_SHORT_PREAMBLE
;
849 entry
->hw_value_short
|= rt2x00_create_rate_hw_value(index
, 1);
853 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev
*rt2x00dev
,
854 struct hw_mode_spec
*spec
)
856 struct ieee80211_hw
*hw
= rt2x00dev
->hw
;
857 struct ieee80211_supported_band
*sbands
;
858 struct ieee80211_channel
*channels
;
859 struct ieee80211_rate
*rates
;
861 unsigned char tx_power
;
863 sbands
= &rt2x00dev
->bands
[0];
865 channels
= kzalloc(sizeof(*channels
) * spec
->num_channels
, GFP_KERNEL
);
869 rates
= kzalloc(sizeof(*rates
) * spec
->num_rates
, GFP_KERNEL
);
871 goto exit_free_channels
;
874 * Initialize Rate list.
876 for (i
= 0; i
< spec
->num_rates
; i
++)
877 rt2x00lib_rate(&rates
[0], i
, rt2x00_get_rate(i
));
880 * Initialize Channel list.
882 for (i
= 0; i
< spec
->num_channels
; i
++) {
883 if (spec
->channels
[i
].channel
<= 14)
884 tx_power
= spec
->tx_power_bg
[i
];
885 else if (spec
->tx_power_a
)
886 tx_power
= spec
->tx_power_a
[i
];
888 tx_power
= spec
->tx_power_default
;
890 rt2x00lib_channel(&channels
[i
],
891 spec
->channels
[i
].channel
, tx_power
, i
);
895 * Intitialize 802.11b
899 if (spec
->num_modes
> 0) {
900 sbands
[IEEE80211_BAND_2GHZ
].n_channels
= 14;
901 sbands
[IEEE80211_BAND_2GHZ
].n_bitrates
= 4;
902 sbands
[IEEE80211_BAND_2GHZ
].channels
= channels
;
903 sbands
[IEEE80211_BAND_2GHZ
].bitrates
= rates
;
904 hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
] = &rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
];
908 * Intitialize 802.11g
912 if (spec
->num_modes
> 1) {
913 sbands
[IEEE80211_BAND_2GHZ
].n_channels
= 14;
914 sbands
[IEEE80211_BAND_2GHZ
].n_bitrates
= spec
->num_rates
;
915 sbands
[IEEE80211_BAND_2GHZ
].channels
= channels
;
916 sbands
[IEEE80211_BAND_2GHZ
].bitrates
= rates
;
917 hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
] = &rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
];
921 * Intitialize 802.11a
923 * Channels: OFDM, UNII, HiperLAN2.
925 if (spec
->num_modes
> 2) {
926 sbands
[IEEE80211_BAND_5GHZ
].n_channels
= spec
->num_channels
- 14;
927 sbands
[IEEE80211_BAND_5GHZ
].n_bitrates
= spec
->num_rates
- 4;
928 sbands
[IEEE80211_BAND_5GHZ
].channels
= &channels
[14];
929 sbands
[IEEE80211_BAND_5GHZ
].bitrates
= &rates
[4];
930 hw
->wiphy
->bands
[IEEE80211_BAND_5GHZ
] = &rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
];
937 ERROR(rt2x00dev
, "Allocation ieee80211 modes failed.\n");
941 static void rt2x00lib_remove_hw(struct rt2x00_dev
*rt2x00dev
)
943 if (test_bit(DEVICE_REGISTERED_HW
, &rt2x00dev
->flags
))
944 ieee80211_unregister_hw(rt2x00dev
->hw
);
946 if (likely(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
])) {
947 kfree(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
]->channels
);
948 kfree(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
]->bitrates
);
949 rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
] = NULL
;
950 rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_5GHZ
] = NULL
;
954 static int rt2x00lib_probe_hw(struct rt2x00_dev
*rt2x00dev
)
956 struct hw_mode_spec
*spec
= &rt2x00dev
->spec
;
960 * Initialize HW modes.
962 status
= rt2x00lib_probe_hw_modes(rt2x00dev
, spec
);
969 status
= ieee80211_register_hw(rt2x00dev
->hw
);
971 rt2x00lib_remove_hw(rt2x00dev
);
975 __set_bit(DEVICE_REGISTERED_HW
, &rt2x00dev
->flags
);
981 * Initialization/uninitialization handlers.
983 static void rt2x00lib_uninitialize(struct rt2x00_dev
*rt2x00dev
)
985 if (!__test_and_clear_bit(DEVICE_INITIALIZED
, &rt2x00dev
->flags
))
991 rt2x00rfkill_unregister(rt2x00dev
);
994 * Allow the HW to uninitialize.
996 rt2x00dev
->ops
->lib
->uninitialize(rt2x00dev
);
999 * Free allocated queue entries.
1001 rt2x00queue_uninitialize(rt2x00dev
);
1004 static int rt2x00lib_initialize(struct rt2x00_dev
*rt2x00dev
)
1008 if (test_bit(DEVICE_INITIALIZED
, &rt2x00dev
->flags
))
1012 * Allocate all queue entries.
1014 status
= rt2x00queue_initialize(rt2x00dev
);
1019 * Initialize the device.
1021 status
= rt2x00dev
->ops
->lib
->initialize(rt2x00dev
);
1025 __set_bit(DEVICE_INITIALIZED
, &rt2x00dev
->flags
);
1028 * Register the rfkill handler.
1030 status
= rt2x00rfkill_register(rt2x00dev
);
1037 rt2x00lib_uninitialize(rt2x00dev
);
1042 int rt2x00lib_start(struct rt2x00_dev
*rt2x00dev
)
1046 if (test_bit(DEVICE_STARTED
, &rt2x00dev
->flags
))
1050 * If this is the first interface which is added,
1051 * we should load the firmware now.
1053 retval
= rt2x00lib_load_firmware(rt2x00dev
);
1058 * Initialize the device.
1060 retval
= rt2x00lib_initialize(rt2x00dev
);
1067 retval
= rt2x00lib_enable_radio(rt2x00dev
);
1069 rt2x00lib_uninitialize(rt2x00dev
);
1073 rt2x00dev
->intf_ap_count
= 0;
1074 rt2x00dev
->intf_sta_count
= 0;
1075 rt2x00dev
->intf_associated
= 0;
1077 __set_bit(DEVICE_STARTED
, &rt2x00dev
->flags
);
1082 void rt2x00lib_stop(struct rt2x00_dev
*rt2x00dev
)
1084 if (!test_bit(DEVICE_STARTED
, &rt2x00dev
->flags
))
1088 * Perhaps we can add something smarter here,
1089 * but for now just disabling the radio should do.
1091 rt2x00lib_disable_radio(rt2x00dev
);
1093 rt2x00dev
->intf_ap_count
= 0;
1094 rt2x00dev
->intf_sta_count
= 0;
1095 rt2x00dev
->intf_associated
= 0;
1097 __clear_bit(DEVICE_STARTED
, &rt2x00dev
->flags
);
1101 * driver allocation handlers.
1103 int rt2x00lib_probe_dev(struct rt2x00_dev
*rt2x00dev
)
1105 int retval
= -ENOMEM
;
1108 * Make room for rt2x00_intf inside the per-interface
1109 * structure ieee80211_vif.
1111 rt2x00dev
->hw
->vif_data_size
= sizeof(struct rt2x00_intf
);
1114 * Let the driver probe the device to detect the capabilities.
1116 retval
= rt2x00dev
->ops
->lib
->probe_hw(rt2x00dev
);
1118 ERROR(rt2x00dev
, "Failed to allocate device.\n");
1123 * Initialize configuration work.
1125 INIT_WORK(&rt2x00dev
->intf_work
, rt2x00lib_intf_scheduled
);
1126 INIT_WORK(&rt2x00dev
->filter_work
, rt2x00lib_packetfilter_scheduled
);
1127 INIT_DELAYED_WORK(&rt2x00dev
->link
.work
, rt2x00lib_link_tuner
);
1130 * Allocate queue array.
1132 retval
= rt2x00queue_allocate(rt2x00dev
);
1137 * Initialize ieee80211 structure.
1139 retval
= rt2x00lib_probe_hw(rt2x00dev
);
1141 ERROR(rt2x00dev
, "Failed to initialize hw.\n");
1148 retval
= rt2x00rfkill_allocate(rt2x00dev
);
1153 * Open the debugfs entry.
1155 rt2x00debug_register(rt2x00dev
);
1157 __set_bit(DEVICE_PRESENT
, &rt2x00dev
->flags
);
1162 rt2x00lib_remove_dev(rt2x00dev
);
1166 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev
);
1168 void rt2x00lib_remove_dev(struct rt2x00_dev
*rt2x00dev
)
1170 __clear_bit(DEVICE_PRESENT
, &rt2x00dev
->flags
);
1175 rt2x00lib_disable_radio(rt2x00dev
);
1178 * Uninitialize device.
1180 rt2x00lib_uninitialize(rt2x00dev
);
1183 * Close debugfs entry.
1185 rt2x00debug_deregister(rt2x00dev
);
1190 rt2x00rfkill_free(rt2x00dev
);
1193 * Free ieee80211_hw memory.
1195 rt2x00lib_remove_hw(rt2x00dev
);
1198 * Free firmware image.
1200 rt2x00lib_free_firmware(rt2x00dev
);
1203 * Free queue structures.
1205 rt2x00queue_free(rt2x00dev
);
1207 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev
);
1210 * Device state handlers
1213 int rt2x00lib_suspend(struct rt2x00_dev
*rt2x00dev
, pm_message_t state
)
1217 NOTICE(rt2x00dev
, "Going to sleep.\n");
1218 __clear_bit(DEVICE_PRESENT
, &rt2x00dev
->flags
);
1221 * Only continue if mac80211 has open interfaces.
1223 if (!test_bit(DEVICE_STARTED
, &rt2x00dev
->flags
))
1225 __set_bit(DEVICE_STARTED_SUSPEND
, &rt2x00dev
->flags
);
1228 * Disable radio and unitialize all items
1229 * that must be recreated on resume.
1231 rt2x00lib_stop(rt2x00dev
);
1232 rt2x00lib_uninitialize(rt2x00dev
);
1233 rt2x00debug_deregister(rt2x00dev
);
1237 * Set device mode to sleep for power management.
1239 retval
= rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_SLEEP
);
1245 EXPORT_SYMBOL_GPL(rt2x00lib_suspend
);
1247 static void rt2x00lib_resume_intf(void *data
, u8
*mac
,
1248 struct ieee80211_vif
*vif
)
1250 struct rt2x00_dev
*rt2x00dev
= data
;
1251 struct rt2x00_intf
*intf
= vif_to_intf(vif
);
1253 spin_lock(&intf
->lock
);
1255 rt2x00lib_config_intf(rt2x00dev
, intf
,
1256 vif
->type
, intf
->mac
, intf
->bssid
);
1260 * Master or Ad-hoc mode require a new beacon update.
1262 if (vif
->type
== IEEE80211_IF_TYPE_AP
||
1263 vif
->type
== IEEE80211_IF_TYPE_IBSS
)
1264 intf
->delayed_flags
|= DELAYED_UPDATE_BEACON
;
1266 spin_unlock(&intf
->lock
);
1269 int rt2x00lib_resume(struct rt2x00_dev
*rt2x00dev
)
1273 NOTICE(rt2x00dev
, "Waking up.\n");
1276 * Open the debugfs entry.
1278 rt2x00debug_register(rt2x00dev
);
1281 * Only continue if mac80211 had open interfaces.
1283 if (!__test_and_clear_bit(DEVICE_STARTED_SUSPEND
, &rt2x00dev
->flags
))
1287 * Reinitialize device and all active interfaces.
1289 retval
= rt2x00lib_start(rt2x00dev
);
1294 * Reconfigure device.
1296 rt2x00lib_config(rt2x00dev
, &rt2x00dev
->hw
->conf
, 1);
1297 if (!rt2x00dev
->hw
->conf
.radio_enabled
)
1298 rt2x00lib_disable_radio(rt2x00dev
);
1301 * Iterator over each active interface to
1302 * reconfigure the hardware.
1304 ieee80211_iterate_active_interfaces(rt2x00dev
->hw
,
1305 rt2x00lib_resume_intf
, rt2x00dev
);
1308 * We are ready again to receive requests from mac80211.
1310 __set_bit(DEVICE_PRESENT
, &rt2x00dev
->flags
);
1313 * It is possible that during that mac80211 has attempted
1314 * to send frames while we were suspending or resuming.
1315 * In that case we have disabled the TX queue and should
1316 * now enable it again
1318 ieee80211_start_queues(rt2x00dev
->hw
);
1321 * During interface iteration we might have changed the
1322 * delayed_flags, time to handles the event by calling
1323 * the work handler directly.
1325 rt2x00lib_intf_scheduled(&rt2x00dev
->intf_work
);
1330 rt2x00lib_disable_radio(rt2x00dev
);
1331 rt2x00lib_uninitialize(rt2x00dev
);
1332 rt2x00debug_deregister(rt2x00dev
);
1336 EXPORT_SYMBOL_GPL(rt2x00lib_resume
);
1337 #endif /* CONFIG_PM */
1340 * rt2x00lib module information.
1342 MODULE_AUTHOR(DRV_PROJECT
);
1343 MODULE_VERSION(DRV_VERSION
);
1344 MODULE_DESCRIPTION("rt2x00 library");
1345 MODULE_LICENSE("GPL");