2 Copyright (C) 2004 - 2007 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"
36 struct data_ring
*rt2x00lib_get_ring(struct rt2x00_dev
*rt2x00dev
,
37 const unsigned int queue
)
39 int beacon
= test_bit(DRIVER_REQUIRE_BEACON_RING
, &rt2x00dev
->flags
);
42 * Check if we are requesting a reqular TX ring,
43 * or if we are requesting a Beacon or Atim ring.
44 * For Atim rings, we should check if it is supported.
46 if (queue
< rt2x00dev
->hw
->queues
&& rt2x00dev
->tx
)
47 return &rt2x00dev
->tx
[queue
];
49 if (!rt2x00dev
->bcn
|| !beacon
)
52 if (queue
== IEEE80211_TX_QUEUE_BEACON
)
53 return &rt2x00dev
->bcn
[0];
54 else if (queue
== IEEE80211_TX_QUEUE_AFTER_BEACON
)
55 return &rt2x00dev
->bcn
[1];
59 EXPORT_SYMBOL_GPL(rt2x00lib_get_ring
);
62 * Link tuning handlers
64 static void rt2x00lib_start_link_tuner(struct rt2x00_dev
*rt2x00dev
)
66 rt2x00dev
->link
.count
= 0;
67 rt2x00dev
->link
.vgc_level
= 0;
69 memset(&rt2x00dev
->link
.qual
, 0, sizeof(rt2x00dev
->link
.qual
));
72 * The RX and TX percentage should start at 50%
73 * this will assure we will get at least get some
74 * decent value when the link tuner starts.
75 * The value will be dropped and overwritten with
76 * the correct (measured )value anyway during the
77 * first run of the link tuner.
79 rt2x00dev
->link
.qual
.rx_percentage
= 50;
80 rt2x00dev
->link
.qual
.tx_percentage
= 50;
83 * Reset the link tuner.
85 rt2x00dev
->ops
->lib
->reset_tuner(rt2x00dev
);
87 queue_delayed_work(rt2x00dev
->hw
->workqueue
,
88 &rt2x00dev
->link
.work
, LINK_TUNE_INTERVAL
);
91 static void rt2x00lib_stop_link_tuner(struct rt2x00_dev
*rt2x00dev
)
93 cancel_delayed_work_sync(&rt2x00dev
->link
.work
);
96 void rt2x00lib_reset_link_tuner(struct rt2x00_dev
*rt2x00dev
)
98 if (!test_bit(DEVICE_ENABLED_RADIO
, &rt2x00dev
->flags
))
101 rt2x00lib_stop_link_tuner(rt2x00dev
);
102 rt2x00lib_start_link_tuner(rt2x00dev
);
106 * Ring initialization
108 static void rt2x00lib_init_rxrings(struct rt2x00_dev
*rt2x00dev
)
110 struct data_ring
*ring
= rt2x00dev
->rx
;
113 if (!rt2x00dev
->ops
->lib
->init_rxentry
)
117 memset(ring
->data_addr
, 0, rt2x00_get_ring_size(ring
));
119 for (i
= 0; i
< ring
->stats
.limit
; i
++)
120 rt2x00dev
->ops
->lib
->init_rxentry(rt2x00dev
, &ring
->entry
[i
]);
122 rt2x00_ring_index_clear(ring
);
125 static void rt2x00lib_init_txrings(struct rt2x00_dev
*rt2x00dev
)
127 struct data_ring
*ring
;
130 if (!rt2x00dev
->ops
->lib
->init_txentry
)
133 txringall_for_each(rt2x00dev
, ring
) {
135 memset(ring
->data_addr
, 0, rt2x00_get_ring_size(ring
));
137 for (i
= 0; i
< ring
->stats
.limit
; i
++)
138 rt2x00dev
->ops
->lib
->init_txentry(rt2x00dev
,
141 rt2x00_ring_index_clear(ring
);
146 * Radio control handlers.
148 int rt2x00lib_enable_radio(struct rt2x00_dev
*rt2x00dev
)
153 * Don't enable the radio twice.
154 * And check if the hardware button has been disabled.
156 if (test_bit(DEVICE_ENABLED_RADIO
, &rt2x00dev
->flags
) ||
157 test_bit(DEVICE_DISABLED_RADIO_HW
, &rt2x00dev
->flags
))
161 * Initialize all data rings.
163 rt2x00lib_init_rxrings(rt2x00dev
);
164 rt2x00lib_init_txrings(rt2x00dev
);
169 status
= rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
,
174 __set_bit(DEVICE_ENABLED_RADIO
, &rt2x00dev
->flags
);
179 rt2x00lib_toggle_rx(rt2x00dev
, STATE_RADIO_RX_ON
);
182 * Start the TX queues.
184 ieee80211_start_queues(rt2x00dev
->hw
);
189 void rt2x00lib_disable_radio(struct rt2x00_dev
*rt2x00dev
)
191 if (!__test_and_clear_bit(DEVICE_ENABLED_RADIO
, &rt2x00dev
->flags
))
195 * Stop all scheduled work.
197 if (work_pending(&rt2x00dev
->beacon_work
))
198 cancel_work_sync(&rt2x00dev
->beacon_work
);
199 if (work_pending(&rt2x00dev
->filter_work
))
200 cancel_work_sync(&rt2x00dev
->filter_work
);
201 if (work_pending(&rt2x00dev
->config_work
))
202 cancel_work_sync(&rt2x00dev
->config_work
);
205 * Stop the TX queues.
207 ieee80211_stop_queues(rt2x00dev
->hw
);
212 rt2x00lib_toggle_rx(rt2x00dev
, STATE_RADIO_RX_OFF
);
217 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_OFF
);
220 void rt2x00lib_toggle_rx(struct rt2x00_dev
*rt2x00dev
, enum dev_state state
)
223 * When we are disabling the RX, we should also stop the link tuner.
225 if (state
== STATE_RADIO_RX_OFF
)
226 rt2x00lib_stop_link_tuner(rt2x00dev
);
228 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, state
);
231 * When we are enabling the RX, we should also start the link tuner.
233 if (state
== STATE_RADIO_RX_ON
&&
234 is_interface_present(&rt2x00dev
->interface
))
235 rt2x00lib_start_link_tuner(rt2x00dev
);
238 static void rt2x00lib_evaluate_antenna_sample(struct rt2x00_dev
*rt2x00dev
)
240 enum antenna rx
= rt2x00dev
->link
.ant
.active
.rx
;
241 enum antenna tx
= rt2x00dev
->link
.ant
.active
.tx
;
243 rt2x00_get_link_ant_rssi_history(&rt2x00dev
->link
, ANTENNA_A
);
245 rt2x00_get_link_ant_rssi_history(&rt2x00dev
->link
, ANTENNA_B
);
248 * We are done sampling. Now we should evaluate the results.
250 rt2x00dev
->link
.ant
.flags
&= ~ANTENNA_MODE_SAMPLE
;
253 * During the last period we have sampled the RSSI
254 * from both antenna's. It now is time to determine
255 * which antenna demonstrated the best performance.
256 * When we are already on the antenna with the best
257 * performance, then there really is nothing for us
260 if (sample_a
== sample_b
)
263 if (rt2x00dev
->link
.ant
.flags
& ANTENNA_RX_DIVERSITY
)
264 rx
= (sample_a
> sample_b
) ? ANTENNA_A
: ANTENNA_B
;
266 if (rt2x00dev
->link
.ant
.flags
& ANTENNA_TX_DIVERSITY
)
267 tx
= (sample_a
> sample_b
) ? ANTENNA_A
: ANTENNA_B
;
269 rt2x00lib_config_antenna(rt2x00dev
, rx
, tx
);
272 static void rt2x00lib_evaluate_antenna_eval(struct rt2x00_dev
*rt2x00dev
)
274 enum antenna rx
= rt2x00dev
->link
.ant
.active
.rx
;
275 enum antenna tx
= rt2x00dev
->link
.ant
.active
.tx
;
276 int rssi_curr
= rt2x00_get_link_ant_rssi(&rt2x00dev
->link
);
277 int rssi_old
= rt2x00_update_ant_rssi(&rt2x00dev
->link
, rssi_curr
);
280 * Legacy driver indicates that we should swap antenna's
281 * when the difference in RSSI is greater that 5. This
282 * also should be done when the RSSI was actually better
283 * then the previous sample.
284 * When the difference exceeds the threshold we should
285 * sample the rssi from the other antenna to make a valid
286 * comparison between the 2 antennas.
288 if (abs(rssi_curr
- rssi_old
) < 5)
291 rt2x00dev
->link
.ant
.flags
|= ANTENNA_MODE_SAMPLE
;
293 if (rt2x00dev
->link
.ant
.flags
& ANTENNA_RX_DIVERSITY
)
294 rx
= (rx
== ANTENNA_A
) ? ANTENNA_B
: ANTENNA_A
;
296 if (rt2x00dev
->link
.ant
.flags
& ANTENNA_TX_DIVERSITY
)
297 tx
= (tx
== ANTENNA_A
) ? ANTENNA_B
: ANTENNA_A
;
299 rt2x00lib_config_antenna(rt2x00dev
, rx
, tx
);
302 static void rt2x00lib_evaluate_antenna(struct rt2x00_dev
*rt2x00dev
)
305 * Determine if software diversity is enabled for
306 * either the TX or RX antenna (or both).
307 * Always perform this check since within the link
308 * tuner interval the configuration might have changed.
310 rt2x00dev
->link
.ant
.flags
&= ~ANTENNA_RX_DIVERSITY
;
311 rt2x00dev
->link
.ant
.flags
&= ~ANTENNA_TX_DIVERSITY
;
313 if (rt2x00dev
->hw
->conf
.antenna_sel_rx
== 0 &&
314 rt2x00dev
->default_ant
.rx
== ANTENNA_SW_DIVERSITY
)
315 rt2x00dev
->link
.ant
.flags
|= ANTENNA_RX_DIVERSITY
;
316 if (rt2x00dev
->hw
->conf
.antenna_sel_tx
== 0 &&
317 rt2x00dev
->default_ant
.tx
== ANTENNA_SW_DIVERSITY
)
318 rt2x00dev
->link
.ant
.flags
|= ANTENNA_TX_DIVERSITY
;
320 if (!(rt2x00dev
->link
.ant
.flags
& ANTENNA_RX_DIVERSITY
) &&
321 !(rt2x00dev
->link
.ant
.flags
& ANTENNA_TX_DIVERSITY
)) {
322 rt2x00dev
->link
.ant
.flags
= 0;
327 * If we have only sampled the data over the last period
328 * we should now harvest the data. Otherwise just evaluate
329 * the data. The latter should only be performed once
332 if (rt2x00dev
->link
.ant
.flags
& ANTENNA_MODE_SAMPLE
)
333 rt2x00lib_evaluate_antenna_sample(rt2x00dev
);
334 else if (rt2x00dev
->link
.count
& 1)
335 rt2x00lib_evaluate_antenna_eval(rt2x00dev
);
338 static void rt2x00lib_update_link_stats(struct link
*link
, int rssi
)
345 if (link
->qual
.avg_rssi
)
346 avg_rssi
= MOVING_AVERAGE(link
->qual
.avg_rssi
, rssi
, 8);
347 link
->qual
.avg_rssi
= avg_rssi
;
350 * Update antenna RSSI
352 if (link
->ant
.rssi_ant
)
353 rssi
= MOVING_AVERAGE(link
->ant
.rssi_ant
, rssi
, 8);
354 link
->ant
.rssi_ant
= rssi
;
357 static void rt2x00lib_precalculate_link_signal(struct link_qual
*qual
)
359 if (qual
->rx_failed
|| qual
->rx_success
)
360 qual
->rx_percentage
=
361 (qual
->rx_success
* 100) /
362 (qual
->rx_failed
+ qual
->rx_success
);
364 qual
->rx_percentage
= 50;
366 if (qual
->tx_failed
|| qual
->tx_success
)
367 qual
->tx_percentage
=
368 (qual
->tx_success
* 100) /
369 (qual
->tx_failed
+ qual
->tx_success
);
371 qual
->tx_percentage
= 50;
373 qual
->rx_success
= 0;
375 qual
->tx_success
= 0;
379 static int rt2x00lib_calculate_link_signal(struct rt2x00_dev
*rt2x00dev
,
382 int rssi_percentage
= 0;
386 * We need a positive value for the RSSI.
389 rssi
+= rt2x00dev
->rssi_offset
;
392 * Calculate the different percentages,
393 * which will be used for the signal.
395 if (rt2x00dev
->rssi_offset
)
396 rssi_percentage
= (rssi
* 100) / rt2x00dev
->rssi_offset
;
399 * Add the individual percentages and use the WEIGHT
400 * defines to calculate the current link signal.
402 signal
= ((WEIGHT_RSSI
* rssi_percentage
) +
403 (WEIGHT_TX
* rt2x00dev
->link
.qual
.tx_percentage
) +
404 (WEIGHT_RX
* rt2x00dev
->link
.qual
.rx_percentage
)) / 100;
406 return (signal
> 100) ? 100 : signal
;
409 static void rt2x00lib_link_tuner(struct work_struct
*work
)
411 struct rt2x00_dev
*rt2x00dev
=
412 container_of(work
, struct rt2x00_dev
, link
.work
.work
);
415 * When the radio is shutting down we should
416 * immediately cease all link tuning.
418 if (!test_bit(DEVICE_ENABLED_RADIO
, &rt2x00dev
->flags
))
424 rt2x00dev
->ops
->lib
->link_stats(rt2x00dev
, &rt2x00dev
->link
.qual
);
425 rt2x00dev
->low_level_stats
.dot11FCSErrorCount
+=
426 rt2x00dev
->link
.qual
.rx_failed
;
429 * Only perform the link tuning when Link tuning
430 * has been enabled (This could have been disabled from the EEPROM).
432 if (!test_bit(CONFIG_DISABLE_LINK_TUNING
, &rt2x00dev
->flags
))
433 rt2x00dev
->ops
->lib
->link_tuner(rt2x00dev
);
436 * Evaluate antenna setup.
438 rt2x00lib_evaluate_antenna(rt2x00dev
);
441 * Precalculate a portion of the link signal which is
442 * in based on the tx/rx success/failure counters.
444 rt2x00lib_precalculate_link_signal(&rt2x00dev
->link
.qual
);
447 * Increase tuner counter, and reschedule the next link tuner run.
449 rt2x00dev
->link
.count
++;
450 queue_delayed_work(rt2x00dev
->hw
->workqueue
, &rt2x00dev
->link
.work
,
454 static void rt2x00lib_packetfilter_scheduled(struct work_struct
*work
)
456 struct rt2x00_dev
*rt2x00dev
=
457 container_of(work
, struct rt2x00_dev
, filter_work
);
458 unsigned int filter
= rt2x00dev
->packet_filter
;
461 * Since we had stored the filter inside interface.filter,
462 * we should now clear that field. Otherwise the driver will
463 * assume nothing has changed (*total_flags will be compared
464 * to interface.filter to determine if any action is required).
466 rt2x00dev
->packet_filter
= 0;
468 rt2x00dev
->ops
->hw
->configure_filter(rt2x00dev
->hw
,
469 filter
, &filter
, 0, NULL
);
472 static void rt2x00lib_configuration_scheduled(struct work_struct
*work
)
474 struct rt2x00_dev
*rt2x00dev
=
475 container_of(work
, struct rt2x00_dev
, config_work
);
476 struct ieee80211_bss_conf bss_conf
;
478 bss_conf
.use_short_preamble
=
479 test_bit(CONFIG_SHORT_PREAMBLE
, &rt2x00dev
->flags
);
482 * FIXME: shouldn't invoke it this way because all other contents
483 * of bss_conf is invalid.
485 rt2x00mac_bss_info_changed(rt2x00dev
->hw
, rt2x00dev
->interface
.id
,
486 &bss_conf
, BSS_CHANGED_ERP_PREAMBLE
);
490 * Interrupt context handlers.
492 static void rt2x00lib_beacondone_scheduled(struct work_struct
*work
)
494 struct rt2x00_dev
*rt2x00dev
=
495 container_of(work
, struct rt2x00_dev
, beacon_work
);
496 struct data_ring
*ring
=
497 rt2x00lib_get_ring(rt2x00dev
, IEEE80211_TX_QUEUE_BEACON
);
498 struct data_entry
*entry
= rt2x00_get_data_entry(ring
);
501 skb
= ieee80211_beacon_get(rt2x00dev
->hw
,
502 rt2x00dev
->interface
.id
,
503 &entry
->tx_status
.control
);
507 rt2x00dev
->ops
->hw
->beacon_update(rt2x00dev
->hw
, skb
,
508 &entry
->tx_status
.control
);
513 void rt2x00lib_beacondone(struct rt2x00_dev
*rt2x00dev
)
515 if (!test_bit(DEVICE_ENABLED_RADIO
, &rt2x00dev
->flags
))
518 queue_work(rt2x00dev
->hw
->workqueue
, &rt2x00dev
->beacon_work
);
520 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone
);
522 void rt2x00lib_txdone(struct data_entry
*entry
,
523 const int status
, const int retry
)
525 struct rt2x00_dev
*rt2x00dev
= entry
->ring
->rt2x00dev
;
526 struct ieee80211_tx_status
*tx_status
= &entry
->tx_status
;
527 struct ieee80211_low_level_stats
*stats
= &rt2x00dev
->low_level_stats
;
528 int success
= !!(status
== TX_SUCCESS
|| status
== TX_SUCCESS_RETRY
);
529 int fail
= !!(status
== TX_FAIL_RETRY
|| status
== TX_FAIL_INVALID
||
530 status
== TX_FAIL_OTHER
);
533 * Update TX statistics.
535 tx_status
->flags
= 0;
536 tx_status
->ack_signal
= 0;
537 tx_status
->excessive_retries
= (status
== TX_FAIL_RETRY
);
538 tx_status
->retry_count
= retry
;
539 rt2x00dev
->link
.qual
.tx_success
+= success
;
540 rt2x00dev
->link
.qual
.tx_failed
+= retry
+ fail
;
542 if (!(tx_status
->control
.flags
& IEEE80211_TXCTL_NO_ACK
)) {
544 tx_status
->flags
|= IEEE80211_TX_STATUS_ACK
;
546 stats
->dot11ACKFailureCount
++;
549 tx_status
->queue_length
= entry
->ring
->stats
.limit
;
550 tx_status
->queue_number
= tx_status
->control
.queue
;
552 if (tx_status
->control
.flags
& IEEE80211_TXCTL_USE_RTS_CTS
) {
554 stats
->dot11RTSSuccessCount
++;
556 stats
->dot11RTSFailureCount
++;
560 * Send the tx_status to mac80211 & debugfs.
561 * mac80211 will clean up the skb structure.
563 get_skb_desc(entry
->skb
)->frame_type
= DUMP_FRAME_TXDONE
;
564 rt2x00debug_dump_frame(rt2x00dev
, entry
->skb
);
565 ieee80211_tx_status_irqsafe(rt2x00dev
->hw
, entry
->skb
, tx_status
);
568 EXPORT_SYMBOL_GPL(rt2x00lib_txdone
);
570 void rt2x00lib_rxdone(struct data_entry
*entry
, struct sk_buff
*skb
,
571 struct rxdata_entry_desc
*desc
)
573 struct rt2x00_dev
*rt2x00dev
= entry
->ring
->rt2x00dev
;
574 struct ieee80211_rx_status
*rx_status
= &rt2x00dev
->rx_status
;
575 struct ieee80211_hw_mode
*mode
;
576 struct ieee80211_rate
*rate
;
577 struct ieee80211_hdr
*hdr
;
583 * Update RX statistics.
585 mode
= &rt2x00dev
->hwmodes
[rt2x00dev
->curr_hwmode
];
586 for (i
= 0; i
< mode
->num_rates
; i
++) {
587 rate
= &mode
->rates
[i
];
590 * When frame was received with an OFDM bitrate,
591 * the signal is the PLCP value. If it was received with
592 * a CCK bitrate the signal is the rate in 0.5kbit/s.
595 val
= DEVICE_GET_RATE_FIELD(rate
->val
, RATE
);
597 val
= DEVICE_GET_RATE_FIELD(rate
->val
, PLCP
);
599 if (val
== desc
->signal
) {
606 * Only update link status if this is a beacon frame carrying our bssid.
608 hdr
= (struct ieee80211_hdr
*)skb
->data
;
609 fc
= le16_to_cpu(hdr
->frame_control
);
610 if (is_beacon(fc
) && desc
->my_bss
)
611 rt2x00lib_update_link_stats(&rt2x00dev
->link
, desc
->rssi
);
613 rt2x00dev
->link
.qual
.rx_success
++;
615 rx_status
->rate
= val
;
617 rt2x00lib_calculate_link_signal(rt2x00dev
, desc
->rssi
);
618 rx_status
->ssi
= desc
->rssi
;
619 rx_status
->flag
= desc
->flags
;
620 rx_status
->antenna
= rt2x00dev
->link
.ant
.active
.rx
;
623 * Send frame to mac80211 & debugfs
625 get_skb_desc(skb
)->frame_type
= DUMP_FRAME_RXDONE
;
626 rt2x00debug_dump_frame(rt2x00dev
, skb
);
627 ieee80211_rx_irqsafe(rt2x00dev
->hw
, skb
, rx_status
);
629 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone
);
632 * TX descriptor initializer
634 void rt2x00lib_write_tx_desc(struct rt2x00_dev
*rt2x00dev
,
636 struct ieee80211_tx_control
*control
)
638 struct txdata_entry_desc desc
;
639 struct skb_desc
*skbdesc
= get_skb_desc(skb
);
640 struct ieee80211_hdr
*ieee80211hdr
= skbdesc
->data
;
649 memset(&desc
, 0, sizeof(desc
));
651 desc
.cw_min
= skbdesc
->ring
->tx_params
.cw_min
;
652 desc
.cw_max
= skbdesc
->ring
->tx_params
.cw_max
;
653 desc
.aifs
= skbdesc
->ring
->tx_params
.aifs
;
658 if (control
->queue
< rt2x00dev
->hw
->queues
)
659 desc
.queue
= control
->queue
;
660 else if (control
->queue
== IEEE80211_TX_QUEUE_BEACON
||
661 control
->queue
== IEEE80211_TX_QUEUE_AFTER_BEACON
)
662 desc
.queue
= QUEUE_MGMT
;
664 desc
.queue
= QUEUE_OTHER
;
667 * Read required fields from ieee80211 header.
669 frame_control
= le16_to_cpu(ieee80211hdr
->frame_control
);
670 seq_ctrl
= le16_to_cpu(ieee80211hdr
->seq_ctrl
);
672 tx_rate
= control
->tx_rate
;
675 * Check whether this frame is to be acked
677 if (!(control
->flags
& IEEE80211_TXCTL_NO_ACK
))
678 __set_bit(ENTRY_TXD_ACK
, &desc
.flags
);
681 * Check if this is a RTS/CTS frame
683 if (is_rts_frame(frame_control
) || is_cts_frame(frame_control
)) {
684 __set_bit(ENTRY_TXD_BURST
, &desc
.flags
);
685 if (is_rts_frame(frame_control
)) {
686 __set_bit(ENTRY_TXD_RTS_FRAME
, &desc
.flags
);
687 __set_bit(ENTRY_TXD_ACK
, &desc
.flags
);
689 __clear_bit(ENTRY_TXD_ACK
, &desc
.flags
);
690 if (control
->rts_cts_rate
)
691 tx_rate
= control
->rts_cts_rate
;
697 if (DEVICE_GET_RATE_FIELD(tx_rate
, RATEMASK
) & DEV_OFDM_RATEMASK
)
698 __set_bit(ENTRY_TXD_OFDM_RATE
, &desc
.flags
);
701 * Check if more fragments are pending
703 if (ieee80211_get_morefrag(ieee80211hdr
)) {
704 __set_bit(ENTRY_TXD_BURST
, &desc
.flags
);
705 __set_bit(ENTRY_TXD_MORE_FRAG
, &desc
.flags
);
709 * Beacons and probe responses require the tsf timestamp
710 * to be inserted into the frame.
712 if (control
->queue
== IEEE80211_TX_QUEUE_BEACON
||
713 is_probe_resp(frame_control
))
714 __set_bit(ENTRY_TXD_REQ_TIMESTAMP
, &desc
.flags
);
717 * Determine with what IFS priority this frame should be send.
718 * Set ifs to IFS_SIFS when the this is not the first fragment,
719 * or this fragment came after RTS/CTS.
721 if ((seq_ctrl
& IEEE80211_SCTL_FRAG
) > 0 ||
722 test_bit(ENTRY_TXD_RTS_FRAME
, &desc
.flags
))
725 desc
.ifs
= IFS_BACKOFF
;
729 * Length calculation depends on OFDM/CCK rate.
731 desc
.signal
= DEVICE_GET_RATE_FIELD(tx_rate
, PLCP
);
734 length
= skbdesc
->data_len
+ FCS_LEN
;
735 if (test_bit(ENTRY_TXD_OFDM_RATE
, &desc
.flags
)) {
736 desc
.length_high
= (length
>> 6) & 0x3f;
737 desc
.length_low
= length
& 0x3f;
739 bitrate
= DEVICE_GET_RATE_FIELD(tx_rate
, RATE
);
742 * Convert length to microseconds.
744 residual
= get_duration_res(length
, bitrate
);
745 duration
= get_duration(length
, bitrate
);
751 * Check if we need to set the Length Extension
753 if (bitrate
== 110 && residual
<= 30)
754 desc
.service
|= 0x80;
757 desc
.length_high
= (duration
>> 8) & 0xff;
758 desc
.length_low
= duration
& 0xff;
761 * When preamble is enabled we should set the
762 * preamble bit for the signal.
764 if (DEVICE_GET_RATE_FIELD(tx_rate
, PREAMBLE
))
768 rt2x00dev
->ops
->lib
->write_tx_desc(rt2x00dev
, skb
, &desc
, control
);
773 skbdesc
->entry
->skb
= skb
;
774 memcpy(&skbdesc
->entry
->tx_status
.control
, control
, sizeof(*control
));
777 * The frame has been completely initialized and ready
778 * for sending to the device. The caller will push the
779 * frame to the device, but we are going to push the
780 * frame to debugfs here.
782 skbdesc
->frame_type
= DUMP_FRAME_TX
;
783 rt2x00debug_dump_frame(rt2x00dev
, skb
);
785 EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc
);
788 * Driver initialization handlers.
790 static void rt2x00lib_channel(struct ieee80211_channel
*entry
,
791 const int channel
, const int tx_power
,
794 entry
->chan
= channel
;
796 entry
->freq
= 2407 + (5 * channel
);
798 entry
->freq
= 5000 + (5 * channel
);
801 IEEE80211_CHAN_W_IBSS
|
802 IEEE80211_CHAN_W_ACTIVE_SCAN
|
803 IEEE80211_CHAN_W_SCAN
;
804 entry
->power_level
= tx_power
;
805 entry
->antenna_max
= 0xff;
808 static void rt2x00lib_rate(struct ieee80211_rate
*entry
,
809 const int rate
, const int mask
,
810 const int plcp
, const int flags
)
814 DEVICE_SET_RATE_FIELD(rate
, RATE
) |
815 DEVICE_SET_RATE_FIELD(mask
, RATEMASK
) |
816 DEVICE_SET_RATE_FIELD(plcp
, PLCP
);
817 entry
->flags
= flags
;
818 entry
->val2
= entry
->val
;
819 if (entry
->flags
& IEEE80211_RATE_PREAMBLE2
)
820 entry
->val2
|= DEVICE_SET_RATE_FIELD(1, PREAMBLE
);
821 entry
->min_rssi_ack
= 0;
822 entry
->min_rssi_ack_delta
= 0;
825 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev
*rt2x00dev
,
826 struct hw_mode_spec
*spec
)
828 struct ieee80211_hw
*hw
= rt2x00dev
->hw
;
829 struct ieee80211_hw_mode
*hwmodes
;
830 struct ieee80211_channel
*channels
;
831 struct ieee80211_rate
*rates
;
833 unsigned char tx_power
;
835 hwmodes
= kzalloc(sizeof(*hwmodes
) * spec
->num_modes
, GFP_KERNEL
);
839 channels
= kzalloc(sizeof(*channels
) * spec
->num_channels
, GFP_KERNEL
);
841 goto exit_free_modes
;
843 rates
= kzalloc(sizeof(*rates
) * spec
->num_rates
, GFP_KERNEL
);
845 goto exit_free_channels
;
848 * Initialize Rate list.
850 rt2x00lib_rate(&rates
[0], 10, DEV_RATEMASK_1MB
,
851 0x00, IEEE80211_RATE_CCK
);
852 rt2x00lib_rate(&rates
[1], 20, DEV_RATEMASK_2MB
,
853 0x01, IEEE80211_RATE_CCK_2
);
854 rt2x00lib_rate(&rates
[2], 55, DEV_RATEMASK_5_5MB
,
855 0x02, IEEE80211_RATE_CCK_2
);
856 rt2x00lib_rate(&rates
[3], 110, DEV_RATEMASK_11MB
,
857 0x03, IEEE80211_RATE_CCK_2
);
859 if (spec
->num_rates
> 4) {
860 rt2x00lib_rate(&rates
[4], 60, DEV_RATEMASK_6MB
,
861 0x0b, IEEE80211_RATE_OFDM
);
862 rt2x00lib_rate(&rates
[5], 90, DEV_RATEMASK_9MB
,
863 0x0f, IEEE80211_RATE_OFDM
);
864 rt2x00lib_rate(&rates
[6], 120, DEV_RATEMASK_12MB
,
865 0x0a, IEEE80211_RATE_OFDM
);
866 rt2x00lib_rate(&rates
[7], 180, DEV_RATEMASK_18MB
,
867 0x0e, IEEE80211_RATE_OFDM
);
868 rt2x00lib_rate(&rates
[8], 240, DEV_RATEMASK_24MB
,
869 0x09, IEEE80211_RATE_OFDM
);
870 rt2x00lib_rate(&rates
[9], 360, DEV_RATEMASK_36MB
,
871 0x0d, IEEE80211_RATE_OFDM
);
872 rt2x00lib_rate(&rates
[10], 480, DEV_RATEMASK_48MB
,
873 0x08, IEEE80211_RATE_OFDM
);
874 rt2x00lib_rate(&rates
[11], 540, DEV_RATEMASK_54MB
,
875 0x0c, IEEE80211_RATE_OFDM
);
879 * Initialize Channel list.
881 for (i
= 0; i
< spec
->num_channels
; i
++) {
882 if (spec
->channels
[i
].channel
<= 14)
883 tx_power
= spec
->tx_power_bg
[i
];
884 else if (spec
->tx_power_a
)
885 tx_power
= spec
->tx_power_a
[i
];
887 tx_power
= spec
->tx_power_default
;
889 rt2x00lib_channel(&channels
[i
],
890 spec
->channels
[i
].channel
, tx_power
, i
);
894 * Intitialize 802.11b
898 if (spec
->num_modes
> HWMODE_B
) {
899 hwmodes
[HWMODE_B
].mode
= MODE_IEEE80211B
;
900 hwmodes
[HWMODE_B
].num_channels
= 14;
901 hwmodes
[HWMODE_B
].num_rates
= 4;
902 hwmodes
[HWMODE_B
].channels
= channels
;
903 hwmodes
[HWMODE_B
].rates
= rates
;
907 * Intitialize 802.11g
911 if (spec
->num_modes
> HWMODE_G
) {
912 hwmodes
[HWMODE_G
].mode
= MODE_IEEE80211G
;
913 hwmodes
[HWMODE_G
].num_channels
= 14;
914 hwmodes
[HWMODE_G
].num_rates
= spec
->num_rates
;
915 hwmodes
[HWMODE_G
].channels
= channels
;
916 hwmodes
[HWMODE_G
].rates
= rates
;
920 * Intitialize 802.11a
922 * Channels: OFDM, UNII, HiperLAN2.
924 if (spec
->num_modes
> HWMODE_A
) {
925 hwmodes
[HWMODE_A
].mode
= MODE_IEEE80211A
;
926 hwmodes
[HWMODE_A
].num_channels
= spec
->num_channels
- 14;
927 hwmodes
[HWMODE_A
].num_rates
= spec
->num_rates
- 4;
928 hwmodes
[HWMODE_A
].channels
= &channels
[14];
929 hwmodes
[HWMODE_A
].rates
= &rates
[4];
932 if (spec
->num_modes
> HWMODE_G
&&
933 ieee80211_register_hwmode(hw
, &hwmodes
[HWMODE_G
]))
934 goto exit_free_rates
;
936 if (spec
->num_modes
> HWMODE_B
&&
937 ieee80211_register_hwmode(hw
, &hwmodes
[HWMODE_B
]))
938 goto exit_free_rates
;
940 if (spec
->num_modes
> HWMODE_A
&&
941 ieee80211_register_hwmode(hw
, &hwmodes
[HWMODE_A
]))
942 goto exit_free_rates
;
944 rt2x00dev
->hwmodes
= hwmodes
;
958 ERROR(rt2x00dev
, "Allocation ieee80211 modes failed.\n");
962 static void rt2x00lib_remove_hw(struct rt2x00_dev
*rt2x00dev
)
964 if (test_bit(DEVICE_REGISTERED_HW
, &rt2x00dev
->flags
))
965 ieee80211_unregister_hw(rt2x00dev
->hw
);
967 if (likely(rt2x00dev
->hwmodes
)) {
968 kfree(rt2x00dev
->hwmodes
->channels
);
969 kfree(rt2x00dev
->hwmodes
->rates
);
970 kfree(rt2x00dev
->hwmodes
);
971 rt2x00dev
->hwmodes
= NULL
;
975 static int rt2x00lib_probe_hw(struct rt2x00_dev
*rt2x00dev
)
977 struct hw_mode_spec
*spec
= &rt2x00dev
->spec
;
981 * Initialize HW modes.
983 status
= rt2x00lib_probe_hw_modes(rt2x00dev
, spec
);
990 status
= ieee80211_register_hw(rt2x00dev
->hw
);
992 rt2x00lib_remove_hw(rt2x00dev
);
996 __set_bit(DEVICE_REGISTERED_HW
, &rt2x00dev
->flags
);
1002 * Initialization/uninitialization handlers.
1004 static int rt2x00lib_alloc_entries(struct data_ring
*ring
,
1005 const u16 max_entries
, const u16 data_size
,
1006 const u16 desc_size
)
1008 struct data_entry
*entry
;
1011 ring
->stats
.limit
= max_entries
;
1012 ring
->data_size
= data_size
;
1013 ring
->desc_size
= desc_size
;
1016 * Allocate all ring entries.
1018 entry
= kzalloc(ring
->stats
.limit
* sizeof(*entry
), GFP_KERNEL
);
1022 for (i
= 0; i
< ring
->stats
.limit
; i
++) {
1024 entry
[i
].ring
= ring
;
1025 entry
[i
].skb
= NULL
;
1026 entry
[i
].entry_idx
= i
;
1029 ring
->entry
= entry
;
1034 static int rt2x00lib_alloc_ring_entries(struct rt2x00_dev
*rt2x00dev
)
1036 struct data_ring
*ring
;
1039 * Allocate the RX ring.
1041 if (rt2x00lib_alloc_entries(rt2x00dev
->rx
, RX_ENTRIES
, DATA_FRAME_SIZE
,
1042 rt2x00dev
->ops
->rxd_size
))
1046 * First allocate the TX rings.
1048 txring_for_each(rt2x00dev
, ring
) {
1049 if (rt2x00lib_alloc_entries(ring
, TX_ENTRIES
, DATA_FRAME_SIZE
,
1050 rt2x00dev
->ops
->txd_size
))
1054 if (!test_bit(DRIVER_REQUIRE_BEACON_RING
, &rt2x00dev
->flags
))
1058 * Allocate the BEACON ring.
1060 if (rt2x00lib_alloc_entries(&rt2x00dev
->bcn
[0], BEACON_ENTRIES
,
1061 MGMT_FRAME_SIZE
, rt2x00dev
->ops
->txd_size
))
1065 * Allocate the Atim ring.
1067 if (rt2x00lib_alloc_entries(&rt2x00dev
->bcn
[1], ATIM_ENTRIES
,
1068 DATA_FRAME_SIZE
, rt2x00dev
->ops
->txd_size
))
1074 static void rt2x00lib_free_ring_entries(struct rt2x00_dev
*rt2x00dev
)
1076 struct data_ring
*ring
;
1078 ring_for_each(rt2x00dev
, ring
) {
1084 static void rt2x00lib_uninitialize(struct rt2x00_dev
*rt2x00dev
)
1086 if (!__test_and_clear_bit(DEVICE_INITIALIZED
, &rt2x00dev
->flags
))
1090 * Unregister rfkill.
1092 rt2x00rfkill_unregister(rt2x00dev
);
1095 * Allow the HW to uninitialize.
1097 rt2x00dev
->ops
->lib
->uninitialize(rt2x00dev
);
1100 * Free allocated ring entries.
1102 rt2x00lib_free_ring_entries(rt2x00dev
);
1105 static int rt2x00lib_initialize(struct rt2x00_dev
*rt2x00dev
)
1109 if (test_bit(DEVICE_INITIALIZED
, &rt2x00dev
->flags
))
1113 * Allocate all ring entries.
1115 status
= rt2x00lib_alloc_ring_entries(rt2x00dev
);
1117 ERROR(rt2x00dev
, "Ring entries allocation failed.\n");
1122 * Initialize the device.
1124 status
= rt2x00dev
->ops
->lib
->initialize(rt2x00dev
);
1128 __set_bit(DEVICE_INITIALIZED
, &rt2x00dev
->flags
);
1131 * Register the rfkill handler.
1133 status
= rt2x00rfkill_register(rt2x00dev
);
1135 goto exit_unitialize
;
1140 rt2x00lib_uninitialize(rt2x00dev
);
1143 rt2x00lib_free_ring_entries(rt2x00dev
);
1148 int rt2x00lib_start(struct rt2x00_dev
*rt2x00dev
)
1152 if (test_bit(DEVICE_STARTED
, &rt2x00dev
->flags
))
1156 * If this is the first interface which is added,
1157 * we should load the firmware now.
1159 if (test_bit(DRIVER_REQUIRE_FIRMWARE
, &rt2x00dev
->flags
)) {
1160 retval
= rt2x00lib_load_firmware(rt2x00dev
);
1166 * Initialize the device.
1168 retval
= rt2x00lib_initialize(rt2x00dev
);
1175 retval
= rt2x00lib_enable_radio(rt2x00dev
);
1177 rt2x00lib_uninitialize(rt2x00dev
);
1181 __set_bit(DEVICE_STARTED
, &rt2x00dev
->flags
);
1186 void rt2x00lib_stop(struct rt2x00_dev
*rt2x00dev
)
1188 if (!test_bit(DEVICE_STARTED
, &rt2x00dev
->flags
))
1192 * Perhaps we can add something smarter here,
1193 * but for now just disabling the radio should do.
1195 rt2x00lib_disable_radio(rt2x00dev
);
1197 __clear_bit(DEVICE_STARTED
, &rt2x00dev
->flags
);
1201 * driver allocation handlers.
1203 static int rt2x00lib_alloc_rings(struct rt2x00_dev
*rt2x00dev
)
1205 struct data_ring
*ring
;
1209 * We need the following rings:
1212 * Beacon: 1 (if required)
1213 * Atim: 1 (if required)
1215 rt2x00dev
->data_rings
= 1 + rt2x00dev
->hw
->queues
+
1216 (2 * test_bit(DRIVER_REQUIRE_BEACON_RING
, &rt2x00dev
->flags
));
1218 ring
= kzalloc(rt2x00dev
->data_rings
* sizeof(*ring
), GFP_KERNEL
);
1220 ERROR(rt2x00dev
, "Ring allocation failed.\n");
1225 * Initialize pointers
1227 rt2x00dev
->rx
= ring
;
1228 rt2x00dev
->tx
= &rt2x00dev
->rx
[1];
1229 if (test_bit(DRIVER_REQUIRE_BEACON_RING
, &rt2x00dev
->flags
))
1230 rt2x00dev
->bcn
= &rt2x00dev
->tx
[rt2x00dev
->hw
->queues
];
1233 * Initialize ring parameters.
1235 * TX: queue_idx = IEEE80211_TX_QUEUE_DATA0 + index
1236 * TX: cw_min: 2^5 = 32.
1237 * TX: cw_max: 2^10 = 1024.
1239 rt2x00dev
->rx
->rt2x00dev
= rt2x00dev
;
1240 rt2x00dev
->rx
->queue_idx
= 0;
1242 index
= IEEE80211_TX_QUEUE_DATA0
;
1243 txring_for_each(rt2x00dev
, ring
) {
1244 ring
->rt2x00dev
= rt2x00dev
;
1245 ring
->queue_idx
= index
++;
1246 ring
->tx_params
.aifs
= 2;
1247 ring
->tx_params
.cw_min
= 5;
1248 ring
->tx_params
.cw_max
= 10;
1254 static void rt2x00lib_free_rings(struct rt2x00_dev
*rt2x00dev
)
1256 kfree(rt2x00dev
->rx
);
1257 rt2x00dev
->rx
= NULL
;
1258 rt2x00dev
->tx
= NULL
;
1259 rt2x00dev
->bcn
= NULL
;
1262 int rt2x00lib_probe_dev(struct rt2x00_dev
*rt2x00dev
)
1264 int retval
= -ENOMEM
;
1267 * Let the driver probe the device to detect the capabilities.
1269 retval
= rt2x00dev
->ops
->lib
->probe_hw(rt2x00dev
);
1271 ERROR(rt2x00dev
, "Failed to allocate device.\n");
1276 * Initialize configuration work.
1278 INIT_WORK(&rt2x00dev
->beacon_work
, rt2x00lib_beacondone_scheduled
);
1279 INIT_WORK(&rt2x00dev
->filter_work
, rt2x00lib_packetfilter_scheduled
);
1280 INIT_WORK(&rt2x00dev
->config_work
, rt2x00lib_configuration_scheduled
);
1281 INIT_DELAYED_WORK(&rt2x00dev
->link
.work
, rt2x00lib_link_tuner
);
1284 * Reset current working type.
1286 rt2x00dev
->interface
.type
= IEEE80211_IF_TYPE_INVALID
;
1289 * Allocate ring array.
1291 retval
= rt2x00lib_alloc_rings(rt2x00dev
);
1296 * Initialize ieee80211 structure.
1298 retval
= rt2x00lib_probe_hw(rt2x00dev
);
1300 ERROR(rt2x00dev
, "Failed to initialize hw.\n");
1307 retval
= rt2x00rfkill_allocate(rt2x00dev
);
1312 * Open the debugfs entry.
1314 rt2x00debug_register(rt2x00dev
);
1316 __set_bit(DEVICE_PRESENT
, &rt2x00dev
->flags
);
1321 rt2x00lib_remove_dev(rt2x00dev
);
1325 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev
);
1327 void rt2x00lib_remove_dev(struct rt2x00_dev
*rt2x00dev
)
1329 __clear_bit(DEVICE_PRESENT
, &rt2x00dev
->flags
);
1334 rt2x00lib_disable_radio(rt2x00dev
);
1337 * Uninitialize device.
1339 rt2x00lib_uninitialize(rt2x00dev
);
1342 * Close debugfs entry.
1344 rt2x00debug_deregister(rt2x00dev
);
1349 rt2x00rfkill_free(rt2x00dev
);
1352 * Free ieee80211_hw memory.
1354 rt2x00lib_remove_hw(rt2x00dev
);
1357 * Free firmware image.
1359 rt2x00lib_free_firmware(rt2x00dev
);
1362 * Free ring structures.
1364 rt2x00lib_free_rings(rt2x00dev
);
1366 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev
);
1369 * Device state handlers
1372 int rt2x00lib_suspend(struct rt2x00_dev
*rt2x00dev
, pm_message_t state
)
1376 NOTICE(rt2x00dev
, "Going to sleep.\n");
1377 __clear_bit(DEVICE_PRESENT
, &rt2x00dev
->flags
);
1380 * Only continue if mac80211 has open interfaces.
1382 if (!test_bit(DEVICE_STARTED
, &rt2x00dev
->flags
))
1384 __set_bit(DEVICE_STARTED_SUSPEND
, &rt2x00dev
->flags
);
1387 * Disable radio and unitialize all items
1388 * that must be recreated on resume.
1390 rt2x00lib_stop(rt2x00dev
);
1391 rt2x00lib_uninitialize(rt2x00dev
);
1392 rt2x00debug_deregister(rt2x00dev
);
1396 * Set device mode to sleep for power management.
1398 retval
= rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_SLEEP
);
1404 EXPORT_SYMBOL_GPL(rt2x00lib_suspend
);
1406 int rt2x00lib_resume(struct rt2x00_dev
*rt2x00dev
)
1408 struct interface
*intf
= &rt2x00dev
->interface
;
1411 NOTICE(rt2x00dev
, "Waking up.\n");
1414 * Open the debugfs entry.
1416 rt2x00debug_register(rt2x00dev
);
1419 * Only continue if mac80211 had open interfaces.
1421 if (!__test_and_clear_bit(DEVICE_STARTED_SUSPEND
, &rt2x00dev
->flags
))
1425 * Reinitialize device and all active interfaces.
1427 retval
= rt2x00lib_start(rt2x00dev
);
1432 * Reconfigure device.
1434 rt2x00lib_config(rt2x00dev
, &rt2x00dev
->hw
->conf
, 1);
1435 if (!rt2x00dev
->hw
->conf
.radio_enabled
)
1436 rt2x00lib_disable_radio(rt2x00dev
);
1438 rt2x00lib_config_mac_addr(rt2x00dev
, intf
->mac
);
1439 rt2x00lib_config_bssid(rt2x00dev
, intf
->bssid
);
1440 rt2x00lib_config_type(rt2x00dev
, intf
->type
);
1443 * We are ready again to receive requests from mac80211.
1445 __set_bit(DEVICE_PRESENT
, &rt2x00dev
->flags
);
1448 * It is possible that during that mac80211 has attempted
1449 * to send frames while we were suspending or resuming.
1450 * In that case we have disabled the TX queue and should
1451 * now enable it again
1453 ieee80211_start_queues(rt2x00dev
->hw
);
1456 * When in Master or Ad-hoc mode,
1457 * restart Beacon transmitting by faking a beacondone event.
1459 if (intf
->type
== IEEE80211_IF_TYPE_AP
||
1460 intf
->type
== IEEE80211_IF_TYPE_IBSS
)
1461 rt2x00lib_beacondone(rt2x00dev
);
1466 rt2x00lib_disable_radio(rt2x00dev
);
1467 rt2x00lib_uninitialize(rt2x00dev
);
1468 rt2x00debug_deregister(rt2x00dev
);
1472 EXPORT_SYMBOL_GPL(rt2x00lib_resume
);
1473 #endif /* CONFIG_PM */
1476 * rt2x00lib module information.
1478 MODULE_AUTHOR(DRV_PROJECT
);
1479 MODULE_VERSION(DRV_VERSION
);
1480 MODULE_DESCRIPTION("rt2x00 library");
1481 MODULE_LICENSE("GPL");