2 Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
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>
28 #include <linux/slab.h>
31 #include "rt2x00lib.h"
34 * Radio control handlers.
36 int rt2x00lib_enable_radio(struct rt2x00_dev
*rt2x00dev
)
41 * Don't enable the radio twice.
42 * And check if the hardware button has been disabled.
44 if (test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
48 * Initialize all data queues.
50 rt2x00queue_init_queues(rt2x00dev
);
56 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_ON
);
60 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_IRQ_ON
);
62 rt2x00leds_led_radio(rt2x00dev
, true);
63 rt2x00led_led_activity(rt2x00dev
, true);
65 set_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
);
70 rt2x00lib_toggle_rx(rt2x00dev
, STATE_RADIO_RX_ON
);
73 * Start watchdog monitoring.
75 rt2x00link_start_watchdog(rt2x00dev
);
78 * Start the TX queues.
80 ieee80211_wake_queues(rt2x00dev
->hw
);
85 void rt2x00lib_disable_radio(struct rt2x00_dev
*rt2x00dev
)
87 if (!test_and_clear_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
91 * Stop the TX queues in mac80211.
93 ieee80211_stop_queues(rt2x00dev
->hw
);
94 rt2x00queue_stop_queues(rt2x00dev
);
97 * Stop watchdog monitoring.
99 rt2x00link_stop_watchdog(rt2x00dev
);
104 rt2x00lib_toggle_rx(rt2x00dev
, STATE_RADIO_RX_OFF
);
109 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_OFF
);
110 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_IRQ_OFF
);
111 rt2x00led_led_activity(rt2x00dev
, false);
112 rt2x00leds_led_radio(rt2x00dev
, false);
115 void rt2x00lib_toggle_rx(struct rt2x00_dev
*rt2x00dev
, enum dev_state state
)
118 * When we are disabling the RX, we should also stop the link tuner.
120 if (state
== STATE_RADIO_RX_OFF
)
121 rt2x00link_stop_tuner(rt2x00dev
);
123 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, state
);
126 * When we are enabling the RX, we should also start the link tuner.
128 if (state
== STATE_RADIO_RX_ON
)
129 rt2x00link_start_tuner(rt2x00dev
);
132 static void rt2x00lib_intf_scheduled_iter(void *data
, u8
*mac
,
133 struct ieee80211_vif
*vif
)
135 struct rt2x00_dev
*rt2x00dev
= data
;
136 struct rt2x00_intf
*intf
= vif_to_intf(vif
);
140 * Copy all data we need during this action under the protection
141 * of a spinlock. Otherwise race conditions might occur which results
142 * into an invalid configuration.
144 spin_lock(&intf
->lock
);
146 delayed_flags
= intf
->delayed_flags
;
147 intf
->delayed_flags
= 0;
149 spin_unlock(&intf
->lock
);
152 * It is possible the radio was disabled while the work had been
153 * scheduled. If that happens we should return here immediately,
154 * note that in the spinlock protected area above the delayed_flags
155 * have been cleared correctly.
157 if (!test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
160 if (delayed_flags
& DELAYED_UPDATE_BEACON
)
161 rt2x00queue_update_beacon(rt2x00dev
, vif
, true);
164 static void rt2x00lib_intf_scheduled(struct work_struct
*work
)
166 struct rt2x00_dev
*rt2x00dev
=
167 container_of(work
, struct rt2x00_dev
, intf_work
);
170 * Iterate over each interface and perform the
171 * requested configurations.
173 ieee80211_iterate_active_interfaces(rt2x00dev
->hw
,
174 rt2x00lib_intf_scheduled_iter
,
179 * Interrupt context handlers.
181 static void rt2x00lib_bc_buffer_iter(void *data
, u8
*mac
,
182 struct ieee80211_vif
*vif
)
184 struct rt2x00_dev
*rt2x00dev
= data
;
188 * Only AP mode interfaces do broad- and multicast buffering
190 if (vif
->type
!= NL80211_IFTYPE_AP
)
194 * Send out buffered broad- and multicast frames
196 skb
= ieee80211_get_buffered_bc(rt2x00dev
->hw
, vif
);
198 rt2x00mac_tx(rt2x00dev
->hw
, skb
);
199 skb
= ieee80211_get_buffered_bc(rt2x00dev
->hw
, vif
);
203 static void rt2x00lib_beaconupdate_iter(void *data
, u8
*mac
,
204 struct ieee80211_vif
*vif
)
206 struct rt2x00_dev
*rt2x00dev
= data
;
208 if (vif
->type
!= NL80211_IFTYPE_AP
&&
209 vif
->type
!= NL80211_IFTYPE_ADHOC
&&
210 vif
->type
!= NL80211_IFTYPE_MESH_POINT
&&
211 vif
->type
!= NL80211_IFTYPE_WDS
)
214 rt2x00queue_update_beacon(rt2x00dev
, vif
, true);
217 void rt2x00lib_beacondone(struct rt2x00_dev
*rt2x00dev
)
219 if (!test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
222 /* send buffered bc/mc frames out for every bssid */
223 ieee80211_iterate_active_interfaces(rt2x00dev
->hw
,
224 rt2x00lib_bc_buffer_iter
,
227 * Devices with pre tbtt interrupt don't need to update the beacon
228 * here as they will fetch the next beacon directly prior to
231 if (test_bit(DRIVER_SUPPORT_PRE_TBTT_INTERRUPT
, &rt2x00dev
->flags
))
234 /* fetch next beacon */
235 ieee80211_iterate_active_interfaces(rt2x00dev
->hw
,
236 rt2x00lib_beaconupdate_iter
,
239 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone
);
241 void rt2x00lib_pretbtt(struct rt2x00_dev
*rt2x00dev
)
243 if (!test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
246 /* fetch next beacon */
247 ieee80211_iterate_active_interfaces(rt2x00dev
->hw
,
248 rt2x00lib_beaconupdate_iter
,
251 EXPORT_SYMBOL_GPL(rt2x00lib_pretbtt
);
253 void rt2x00lib_txdone(struct queue_entry
*entry
,
254 struct txdone_entry_desc
*txdesc
)
256 struct rt2x00_dev
*rt2x00dev
= entry
->queue
->rt2x00dev
;
257 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(entry
->skb
);
258 struct skb_frame_desc
*skbdesc
= get_skb_frame_desc(entry
->skb
);
259 enum data_queue_qid qid
= skb_get_queue_mapping(entry
->skb
);
260 unsigned int header_length
= ieee80211_get_hdrlen_from_skb(entry
->skb
);
261 u8 rate_idx
, rate_flags
, retry_rates
;
262 u8 skbdesc_flags
= skbdesc
->flags
;
269 rt2x00queue_unmap_skb(rt2x00dev
, entry
->skb
);
272 * Remove the extra tx headroom from the skb.
274 skb_pull(entry
->skb
, rt2x00dev
->ops
->extra_tx_headroom
);
277 * Signal that the TX descriptor is no longer in the skb.
279 skbdesc
->flags
&= ~SKBDESC_DESC_IN_SKB
;
282 * Remove L2 padding which was added during
284 if (test_bit(DRIVER_REQUIRE_L2PAD
, &rt2x00dev
->flags
))
285 rt2x00queue_remove_l2pad(entry
->skb
, header_length
);
288 * If the IV/EIV data was stripped from the frame before it was
289 * passed to the hardware, we should now reinsert it again because
290 * mac80211 will expect the same data to be present it the
291 * frame as it was passed to us.
293 if (test_bit(CONFIG_SUPPORT_HW_CRYPTO
, &rt2x00dev
->flags
))
294 rt2x00crypto_tx_insert_iv(entry
->skb
, header_length
);
297 * Send frame to debugfs immediately, after this call is completed
298 * we are going to overwrite the skb->cb array.
300 rt2x00debug_dump_frame(rt2x00dev
, DUMP_FRAME_TXDONE
, entry
->skb
);
303 * Determine if the frame has been successfully transmitted.
306 test_bit(TXDONE_SUCCESS
, &txdesc
->flags
) ||
307 test_bit(TXDONE_UNKNOWN
, &txdesc
->flags
);
310 * Update TX statistics.
312 rt2x00dev
->link
.qual
.tx_success
+= success
;
313 rt2x00dev
->link
.qual
.tx_failed
+= !success
;
315 rate_idx
= skbdesc
->tx_rate_idx
;
316 rate_flags
= skbdesc
->tx_rate_flags
;
317 retry_rates
= test_bit(TXDONE_FALLBACK
, &txdesc
->flags
) ?
318 (txdesc
->retry
+ 1) : 1;
321 * Initialize TX status
323 memset(&tx_info
->status
, 0, sizeof(tx_info
->status
));
324 tx_info
->status
.ack_signal
= 0;
327 * Frame was send with retries, hardware tried
328 * different rates to send out the frame, at each
329 * retry it lowered the rate 1 step except when the
330 * lowest rate was used.
332 for (i
= 0; i
< retry_rates
&& i
< IEEE80211_TX_MAX_RATES
; i
++) {
333 tx_info
->status
.rates
[i
].idx
= rate_idx
- i
;
334 tx_info
->status
.rates
[i
].flags
= rate_flags
;
336 if (rate_idx
- i
== 0) {
338 * The lowest rate (index 0) was used until the
339 * number of max retries was reached.
341 tx_info
->status
.rates
[i
].count
= retry_rates
- i
;
345 tx_info
->status
.rates
[i
].count
= 1;
347 if (i
< (IEEE80211_TX_MAX_RATES
- 1))
348 tx_info
->status
.rates
[i
].idx
= -1; /* terminate */
350 if (!(tx_info
->flags
& IEEE80211_TX_CTL_NO_ACK
)) {
352 tx_info
->flags
|= IEEE80211_TX_STAT_ACK
;
354 rt2x00dev
->low_level_stats
.dot11ACKFailureCount
++;
358 * Every single frame has it's own tx status, hence report
359 * every frame as ampdu of size 1.
361 * TODO: if we can find out how many frames were aggregated
362 * by the hw we could provide the real ampdu_len to mac80211
363 * which would allow the rc algorithm to better decide on
364 * which rates are suitable.
366 if (tx_info
->flags
& IEEE80211_TX_CTL_AMPDU
) {
367 tx_info
->flags
|= IEEE80211_TX_STAT_AMPDU
;
368 tx_info
->status
.ampdu_len
= 1;
369 tx_info
->status
.ampdu_ack_len
= success
? 1 : 0;
372 if (rate_flags
& IEEE80211_TX_RC_USE_RTS_CTS
) {
374 rt2x00dev
->low_level_stats
.dot11RTSSuccessCount
++;
376 rt2x00dev
->low_level_stats
.dot11RTSFailureCount
++;
380 * Only send the status report to mac80211 when it's a frame
381 * that originated in mac80211. If this was a extra frame coming
382 * through a mac80211 library call (RTS/CTS) then we should not
383 * send the status report back.
385 if (!(skbdesc_flags
& SKBDESC_NOT_MAC80211
))
387 * Only PCI and SOC devices process the tx status in process
388 * context. Hence use ieee80211_tx_status for PCI and SOC
389 * devices and stick to ieee80211_tx_status_irqsafe for USB.
391 if (rt2x00_is_usb(rt2x00dev
))
392 ieee80211_tx_status_irqsafe(rt2x00dev
->hw
, entry
->skb
);
394 ieee80211_tx_status(rt2x00dev
->hw
, entry
->skb
);
396 dev_kfree_skb_any(entry
->skb
);
399 * Make this entry available for reuse.
404 rt2x00dev
->ops
->lib
->clear_entry(entry
);
406 clear_bit(ENTRY_OWNER_DEVICE_DATA
, &entry
->flags
);
407 rt2x00queue_index_inc(entry
->queue
, Q_INDEX_DONE
);
410 * If the data queue was below the threshold before the txdone
411 * handler we must make sure the packet queue in the mac80211 stack
412 * is reenabled when the txdone handler has finished.
414 if (!rt2x00queue_threshold(entry
->queue
))
415 ieee80211_wake_queue(rt2x00dev
->hw
, qid
);
417 EXPORT_SYMBOL_GPL(rt2x00lib_txdone
);
419 static int rt2x00lib_rxdone_read_signal(struct rt2x00_dev
*rt2x00dev
,
420 struct rxdone_entry_desc
*rxdesc
)
422 struct ieee80211_supported_band
*sband
;
423 const struct rt2x00_rate
*rate
;
429 * For non-HT rates the MCS value needs to contain the
430 * actually used rate modulation (CCK or OFDM).
432 if (rxdesc
->dev_flags
& RXDONE_SIGNAL_MCS
)
433 signal
= RATE_MCS(rxdesc
->rate_mode
, rxdesc
->signal
);
435 signal
= rxdesc
->signal
;
437 type
= (rxdesc
->dev_flags
& RXDONE_SIGNAL_MASK
);
439 sband
= &rt2x00dev
->bands
[rt2x00dev
->curr_band
];
440 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
441 rate
= rt2x00_get_rate(sband
->bitrates
[i
].hw_value
);
443 if (((type
== RXDONE_SIGNAL_PLCP
) &&
444 (rate
->plcp
== signal
)) ||
445 ((type
== RXDONE_SIGNAL_BITRATE
) &&
446 (rate
->bitrate
== signal
)) ||
447 ((type
== RXDONE_SIGNAL_MCS
) &&
448 (rate
->mcs
== signal
))) {
453 WARNING(rt2x00dev
, "Frame received with unrecognized signal, "
454 "signal=0x%.4x, type=%d.\n", signal
, type
);
458 void rt2x00lib_rxdone(struct rt2x00_dev
*rt2x00dev
,
459 struct queue_entry
*entry
)
461 struct rxdone_entry_desc rxdesc
;
463 struct ieee80211_rx_status
*rx_status
= &rt2x00dev
->rx_status
;
464 unsigned int header_length
;
467 * Allocate a new sk_buffer. If no new buffer available, drop the
468 * received frame and reuse the existing buffer.
470 skb
= rt2x00queue_alloc_rxskb(rt2x00dev
, entry
);
477 rt2x00queue_unmap_skb(rt2x00dev
, entry
->skb
);
480 * Extract the RXD details.
482 memset(&rxdesc
, 0, sizeof(rxdesc
));
483 rt2x00dev
->ops
->lib
->fill_rxdone(entry
, &rxdesc
);
486 * The data behind the ieee80211 header must be
487 * aligned on a 4 byte boundary.
489 header_length
= ieee80211_get_hdrlen_from_skb(entry
->skb
);
492 * Hardware might have stripped the IV/EIV/ICV data,
493 * in that case it is possible that the data was
494 * provided separately (through hardware descriptor)
495 * in which case we should reinsert the data into the frame.
497 if ((rxdesc
.dev_flags
& RXDONE_CRYPTO_IV
) &&
498 (rxdesc
.flags
& RX_FLAG_IV_STRIPPED
))
499 rt2x00crypto_rx_insert_iv(entry
->skb
, header_length
,
501 else if (header_length
&&
502 (rxdesc
.size
> header_length
) &&
503 (rxdesc
.dev_flags
& RXDONE_L2PAD
))
504 rt2x00queue_remove_l2pad(entry
->skb
, header_length
);
506 rt2x00queue_align_payload(entry
->skb
, header_length
);
508 /* Trim buffer to correct size */
509 skb_trim(entry
->skb
, rxdesc
.size
);
512 * Check if the frame was received using HT. In that case,
513 * the rate is the MCS index and should be passed to mac80211
514 * directly. Otherwise we need to translate the signal to
515 * the correct bitrate index.
517 if (rxdesc
.rate_mode
== RATE_MODE_CCK
||
518 rxdesc
.rate_mode
== RATE_MODE_OFDM
) {
519 rate_idx
= rt2x00lib_rxdone_read_signal(rt2x00dev
, &rxdesc
);
521 rxdesc
.flags
|= RX_FLAG_HT
;
522 rate_idx
= rxdesc
.signal
;
526 * Update extra components
528 rt2x00link_update_stats(rt2x00dev
, entry
->skb
, &rxdesc
);
529 rt2x00debug_update_crypto(rt2x00dev
, &rxdesc
);
531 rx_status
->mactime
= rxdesc
.timestamp
;
532 rx_status
->rate_idx
= rate_idx
;
533 rx_status
->signal
= rxdesc
.rssi
;
534 rx_status
->flag
= rxdesc
.flags
;
535 rx_status
->antenna
= rt2x00dev
->link
.ant
.active
.rx
;
538 * Send frame to mac80211 & debugfs.
539 * mac80211 will clean up the skb structure.
541 rt2x00debug_dump_frame(rt2x00dev
, DUMP_FRAME_RXDONE
, entry
->skb
);
542 memcpy(IEEE80211_SKB_RXCB(entry
->skb
), rx_status
, sizeof(*rx_status
));
545 * Currently only PCI and SOC devices handle rx interrupts in process
546 * context. Hence, use ieee80211_rx_irqsafe for USB and ieee80211_rx_ni
547 * for PCI and SOC devices.
549 if (rt2x00_is_usb(rt2x00dev
))
550 ieee80211_rx_irqsafe(rt2x00dev
->hw
, entry
->skb
);
552 ieee80211_rx_ni(rt2x00dev
->hw
, entry
->skb
);
555 * Replace the skb with the freshly allocated one.
560 rt2x00dev
->ops
->lib
->clear_entry(entry
);
562 rt2x00queue_index_inc(entry
->queue
, Q_INDEX
);
564 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone
);
567 * Driver initialization handlers.
569 const struct rt2x00_rate rt2x00_supported_rates
[12] = {
571 .flags
= DEV_RATE_CCK
,
575 .mcs
= RATE_MCS(RATE_MODE_CCK
, 0),
578 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
,
582 .mcs
= RATE_MCS(RATE_MODE_CCK
, 1),
585 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
,
589 .mcs
= RATE_MCS(RATE_MODE_CCK
, 2),
592 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
,
596 .mcs
= RATE_MCS(RATE_MODE_CCK
, 3),
599 .flags
= DEV_RATE_OFDM
,
603 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 0),
606 .flags
= DEV_RATE_OFDM
,
610 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 1),
613 .flags
= DEV_RATE_OFDM
,
617 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 2),
620 .flags
= DEV_RATE_OFDM
,
624 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 3),
627 .flags
= DEV_RATE_OFDM
,
631 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 4),
634 .flags
= DEV_RATE_OFDM
,
638 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 5),
641 .flags
= DEV_RATE_OFDM
,
645 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 6),
648 .flags
= DEV_RATE_OFDM
,
652 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 7),
656 static void rt2x00lib_channel(struct ieee80211_channel
*entry
,
657 const int channel
, const int tx_power
,
660 entry
->center_freq
= ieee80211_channel_to_frequency(channel
);
661 entry
->hw_value
= value
;
662 entry
->max_power
= tx_power
;
663 entry
->max_antenna_gain
= 0xff;
666 static void rt2x00lib_rate(struct ieee80211_rate
*entry
,
667 const u16 index
, const struct rt2x00_rate
*rate
)
670 entry
->bitrate
= rate
->bitrate
;
671 entry
->hw_value
=index
;
672 entry
->hw_value_short
= index
;
674 if (rate
->flags
& DEV_RATE_SHORT_PREAMBLE
)
675 entry
->flags
|= IEEE80211_RATE_SHORT_PREAMBLE
;
678 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev
*rt2x00dev
,
679 struct hw_mode_spec
*spec
)
681 struct ieee80211_hw
*hw
= rt2x00dev
->hw
;
682 struct ieee80211_channel
*channels
;
683 struct ieee80211_rate
*rates
;
684 unsigned int num_rates
;
688 if (spec
->supported_rates
& SUPPORT_RATE_CCK
)
690 if (spec
->supported_rates
& SUPPORT_RATE_OFDM
)
693 channels
= kzalloc(sizeof(*channels
) * spec
->num_channels
, GFP_KERNEL
);
697 rates
= kzalloc(sizeof(*rates
) * num_rates
, GFP_KERNEL
);
699 goto exit_free_channels
;
702 * Initialize Rate list.
704 for (i
= 0; i
< num_rates
; i
++)
705 rt2x00lib_rate(&rates
[i
], i
, rt2x00_get_rate(i
));
708 * Initialize Channel list.
710 for (i
= 0; i
< spec
->num_channels
; i
++) {
711 rt2x00lib_channel(&channels
[i
],
712 spec
->channels
[i
].channel
,
713 spec
->channels_info
[i
].max_power
, i
);
717 * Intitialize 802.11b, 802.11g
721 if (spec
->supported_bands
& SUPPORT_BAND_2GHZ
) {
722 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].n_channels
= 14;
723 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].n_bitrates
= num_rates
;
724 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].channels
= channels
;
725 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].bitrates
= rates
;
726 hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
] =
727 &rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
];
728 memcpy(&rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].ht_cap
,
729 &spec
->ht
, sizeof(spec
->ht
));
733 * Intitialize 802.11a
735 * Channels: OFDM, UNII, HiperLAN2.
737 if (spec
->supported_bands
& SUPPORT_BAND_5GHZ
) {
738 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].n_channels
=
739 spec
->num_channels
- 14;
740 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].n_bitrates
=
742 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].channels
= &channels
[14];
743 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].bitrates
= &rates
[4];
744 hw
->wiphy
->bands
[IEEE80211_BAND_5GHZ
] =
745 &rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
];
746 memcpy(&rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].ht_cap
,
747 &spec
->ht
, sizeof(spec
->ht
));
754 ERROR(rt2x00dev
, "Allocation ieee80211 modes failed.\n");
758 static void rt2x00lib_remove_hw(struct rt2x00_dev
*rt2x00dev
)
760 if (test_bit(DEVICE_STATE_REGISTERED_HW
, &rt2x00dev
->flags
))
761 ieee80211_unregister_hw(rt2x00dev
->hw
);
763 if (likely(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
])) {
764 kfree(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
]->channels
);
765 kfree(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
]->bitrates
);
766 rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
] = NULL
;
767 rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_5GHZ
] = NULL
;
770 kfree(rt2x00dev
->spec
.channels_info
);
773 static int rt2x00lib_probe_hw(struct rt2x00_dev
*rt2x00dev
)
775 struct hw_mode_spec
*spec
= &rt2x00dev
->spec
;
778 if (test_bit(DEVICE_STATE_REGISTERED_HW
, &rt2x00dev
->flags
))
782 * Initialize HW modes.
784 status
= rt2x00lib_probe_hw_modes(rt2x00dev
, spec
);
789 * Initialize HW fields.
791 rt2x00dev
->hw
->queues
= rt2x00dev
->ops
->tx_queues
;
794 * Initialize extra TX headroom required.
796 rt2x00dev
->hw
->extra_tx_headroom
=
797 max_t(unsigned int, IEEE80211_TX_STATUS_HEADROOM
,
798 rt2x00dev
->ops
->extra_tx_headroom
);
801 * Take TX headroom required for alignment into account.
803 if (test_bit(DRIVER_REQUIRE_L2PAD
, &rt2x00dev
->flags
))
804 rt2x00dev
->hw
->extra_tx_headroom
+= RT2X00_L2PAD_SIZE
;
805 else if (test_bit(DRIVER_REQUIRE_DMA
, &rt2x00dev
->flags
))
806 rt2x00dev
->hw
->extra_tx_headroom
+= RT2X00_ALIGN_SIZE
;
811 status
= ieee80211_register_hw(rt2x00dev
->hw
);
815 set_bit(DEVICE_STATE_REGISTERED_HW
, &rt2x00dev
->flags
);
821 * Initialization/uninitialization handlers.
823 static void rt2x00lib_uninitialize(struct rt2x00_dev
*rt2x00dev
)
825 if (!test_and_clear_bit(DEVICE_STATE_INITIALIZED
, &rt2x00dev
->flags
))
829 * Unregister extra components.
831 rt2x00rfkill_unregister(rt2x00dev
);
834 * Allow the HW to uninitialize.
836 rt2x00dev
->ops
->lib
->uninitialize(rt2x00dev
);
839 * Free allocated queue entries.
841 rt2x00queue_uninitialize(rt2x00dev
);
844 static int rt2x00lib_initialize(struct rt2x00_dev
*rt2x00dev
)
848 if (test_bit(DEVICE_STATE_INITIALIZED
, &rt2x00dev
->flags
))
852 * Allocate all queue entries.
854 status
= rt2x00queue_initialize(rt2x00dev
);
859 * Initialize the device.
861 status
= rt2x00dev
->ops
->lib
->initialize(rt2x00dev
);
863 rt2x00queue_uninitialize(rt2x00dev
);
867 set_bit(DEVICE_STATE_INITIALIZED
, &rt2x00dev
->flags
);
870 * Register the extra components.
872 rt2x00rfkill_register(rt2x00dev
);
877 int rt2x00lib_start(struct rt2x00_dev
*rt2x00dev
)
881 if (test_bit(DEVICE_STATE_STARTED
, &rt2x00dev
->flags
))
885 * If this is the first interface which is added,
886 * we should load the firmware now.
888 retval
= rt2x00lib_load_firmware(rt2x00dev
);
893 * Initialize the device.
895 retval
= rt2x00lib_initialize(rt2x00dev
);
899 rt2x00dev
->intf_ap_count
= 0;
900 rt2x00dev
->intf_sta_count
= 0;
901 rt2x00dev
->intf_associated
= 0;
903 /* Enable the radio */
904 retval
= rt2x00lib_enable_radio(rt2x00dev
);
906 rt2x00queue_uninitialize(rt2x00dev
);
910 set_bit(DEVICE_STATE_STARTED
, &rt2x00dev
->flags
);
915 void rt2x00lib_stop(struct rt2x00_dev
*rt2x00dev
)
917 if (!test_and_clear_bit(DEVICE_STATE_STARTED
, &rt2x00dev
->flags
))
921 * Perhaps we can add something smarter here,
922 * but for now just disabling the radio should do.
924 rt2x00lib_disable_radio(rt2x00dev
);
926 rt2x00dev
->intf_ap_count
= 0;
927 rt2x00dev
->intf_sta_count
= 0;
928 rt2x00dev
->intf_associated
= 0;
932 * driver allocation handlers.
934 int rt2x00lib_probe_dev(struct rt2x00_dev
*rt2x00dev
)
936 int retval
= -ENOMEM
;
938 mutex_init(&rt2x00dev
->csr_mutex
);
940 set_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
);
943 * Make room for rt2x00_intf inside the per-interface
944 * structure ieee80211_vif.
946 rt2x00dev
->hw
->vif_data_size
= sizeof(struct rt2x00_intf
);
949 * Determine which operating modes are supported, all modes
950 * which require beaconing, depend on the availability of
953 rt2x00dev
->hw
->wiphy
->interface_modes
= BIT(NL80211_IFTYPE_STATION
);
954 if (rt2x00dev
->ops
->bcn
->entry_num
> 0)
955 rt2x00dev
->hw
->wiphy
->interface_modes
|=
956 BIT(NL80211_IFTYPE_ADHOC
) |
957 BIT(NL80211_IFTYPE_AP
) |
958 BIT(NL80211_IFTYPE_MESH_POINT
) |
959 BIT(NL80211_IFTYPE_WDS
);
962 * Initialize configuration work.
964 INIT_WORK(&rt2x00dev
->intf_work
, rt2x00lib_intf_scheduled
);
967 * Let the driver probe the device to detect the capabilities.
969 retval
= rt2x00dev
->ops
->lib
->probe_hw(rt2x00dev
);
971 ERROR(rt2x00dev
, "Failed to allocate device.\n");
976 * Allocate queue array.
978 retval
= rt2x00queue_allocate(rt2x00dev
);
983 * Initialize ieee80211 structure.
985 retval
= rt2x00lib_probe_hw(rt2x00dev
);
987 ERROR(rt2x00dev
, "Failed to initialize hw.\n");
992 * Register extra components.
994 rt2x00link_register(rt2x00dev
);
995 rt2x00leds_register(rt2x00dev
);
996 rt2x00debug_register(rt2x00dev
);
1001 rt2x00lib_remove_dev(rt2x00dev
);
1005 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev
);
1007 void rt2x00lib_remove_dev(struct rt2x00_dev
*rt2x00dev
)
1009 clear_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
);
1014 rt2x00lib_disable_radio(rt2x00dev
);
1019 cancel_work_sync(&rt2x00dev
->intf_work
);
1022 * Uninitialize device.
1024 rt2x00lib_uninitialize(rt2x00dev
);
1027 * Free extra components
1029 rt2x00debug_deregister(rt2x00dev
);
1030 rt2x00leds_unregister(rt2x00dev
);
1033 * Free ieee80211_hw memory.
1035 rt2x00lib_remove_hw(rt2x00dev
);
1038 * Free firmware image.
1040 rt2x00lib_free_firmware(rt2x00dev
);
1043 * Free queue structures.
1045 rt2x00queue_free(rt2x00dev
);
1047 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev
);
1050 * Device state handlers
1053 int rt2x00lib_suspend(struct rt2x00_dev
*rt2x00dev
, pm_message_t state
)
1055 NOTICE(rt2x00dev
, "Going to sleep.\n");
1058 * Prevent mac80211 from accessing driver while suspended.
1060 if (!test_and_clear_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
))
1064 * Cleanup as much as possible.
1066 rt2x00lib_uninitialize(rt2x00dev
);
1069 * Suspend/disable extra components.
1071 rt2x00leds_suspend(rt2x00dev
);
1072 rt2x00debug_deregister(rt2x00dev
);
1075 * Set device mode to sleep for power management,
1076 * on some hardware this call seems to consistently fail.
1077 * From the specifications it is hard to tell why it fails,
1078 * and if this is a "bad thing".
1079 * Overall it is safe to just ignore the failure and
1080 * continue suspending. The only downside is that the
1081 * device will not be in optimal power save mode, but with
1082 * the radio and the other components already disabled the
1083 * device is as good as disabled.
1085 if (rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_SLEEP
))
1086 WARNING(rt2x00dev
, "Device failed to enter sleep state, "
1087 "continue suspending.\n");
1091 EXPORT_SYMBOL_GPL(rt2x00lib_suspend
);
1093 int rt2x00lib_resume(struct rt2x00_dev
*rt2x00dev
)
1095 NOTICE(rt2x00dev
, "Waking up.\n");
1098 * Restore/enable extra components.
1100 rt2x00debug_register(rt2x00dev
);
1101 rt2x00leds_resume(rt2x00dev
);
1104 * We are ready again to receive requests from mac80211.
1106 set_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
);
1110 EXPORT_SYMBOL_GPL(rt2x00lib_resume
);
1111 #endif /* CONFIG_PM */
1114 * rt2x00lib module information.
1116 MODULE_AUTHOR(DRV_PROJECT
);
1117 MODULE_VERSION(DRV_VERSION
);
1118 MODULE_DESCRIPTION("rt2x00 library");
1119 MODULE_LICENSE("GPL");