2 Copyright (C) 2010 Willow Garage <http://www.willowgarage.com>
3 Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com>
4 <http://rt2x00.serialmonkey.com>
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the
18 Free Software Foundation, Inc.,
19 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 Abstract: rt2x00 generic device routines.
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/slab.h>
32 #include "rt2x00lib.h"
35 * Radio control handlers.
37 int rt2x00lib_enable_radio(struct rt2x00_dev
*rt2x00dev
)
42 * Don't enable the radio twice.
43 * And check if the hardware button has been disabled.
45 if (test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
49 * Initialize all data queues.
51 rt2x00queue_init_queues(rt2x00dev
);
57 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_ON
);
61 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_IRQ_ON
);
63 rt2x00leds_led_radio(rt2x00dev
, true);
64 rt2x00led_led_activity(rt2x00dev
, true);
66 set_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
);
71 rt2x00queue_start_queues(rt2x00dev
);
72 rt2x00link_start_tuner(rt2x00dev
);
75 * Start watchdog monitoring.
77 rt2x00link_start_watchdog(rt2x00dev
);
82 void rt2x00lib_disable_radio(struct rt2x00_dev
*rt2x00dev
)
84 if (!test_and_clear_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
88 * Stop watchdog monitoring.
90 rt2x00link_stop_watchdog(rt2x00dev
);
95 rt2x00link_stop_tuner(rt2x00dev
);
96 rt2x00queue_stop_queues(rt2x00dev
);
97 rt2x00queue_flush_queues(rt2x00dev
, true);
102 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_OFF
);
103 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_IRQ_OFF
);
104 rt2x00led_led_activity(rt2x00dev
, false);
105 rt2x00leds_led_radio(rt2x00dev
, false);
108 static void rt2x00lib_intf_scheduled_iter(void *data
, u8
*mac
,
109 struct ieee80211_vif
*vif
)
111 struct rt2x00_dev
*rt2x00dev
= data
;
112 struct rt2x00_intf
*intf
= vif_to_intf(vif
);
115 * It is possible the radio was disabled while the work had been
116 * scheduled. If that happens we should return here immediately,
117 * note that in the spinlock protected area above the delayed_flags
118 * have been cleared correctly.
120 if (!test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
123 if (test_and_clear_bit(DELAYED_UPDATE_BEACON
, &intf
->delayed_flags
))
124 rt2x00queue_update_beacon(rt2x00dev
, vif
);
127 static void rt2x00lib_intf_scheduled(struct work_struct
*work
)
129 struct rt2x00_dev
*rt2x00dev
=
130 container_of(work
, struct rt2x00_dev
, intf_work
);
133 * Iterate over each interface and perform the
134 * requested configurations.
136 ieee80211_iterate_active_interfaces(rt2x00dev
->hw
,
137 rt2x00lib_intf_scheduled_iter
,
142 * Interrupt context handlers.
144 static void rt2x00lib_bc_buffer_iter(void *data
, u8
*mac
,
145 struct ieee80211_vif
*vif
)
147 struct rt2x00_dev
*rt2x00dev
= data
;
151 * Only AP mode interfaces do broad- and multicast buffering
153 if (vif
->type
!= NL80211_IFTYPE_AP
)
157 * Send out buffered broad- and multicast frames
159 skb
= ieee80211_get_buffered_bc(rt2x00dev
->hw
, vif
);
161 rt2x00mac_tx(rt2x00dev
->hw
, skb
);
162 skb
= ieee80211_get_buffered_bc(rt2x00dev
->hw
, vif
);
166 static void rt2x00lib_beaconupdate_iter(void *data
, u8
*mac
,
167 struct ieee80211_vif
*vif
)
169 struct rt2x00_dev
*rt2x00dev
= data
;
171 if (vif
->type
!= NL80211_IFTYPE_AP
&&
172 vif
->type
!= NL80211_IFTYPE_ADHOC
&&
173 vif
->type
!= NL80211_IFTYPE_MESH_POINT
&&
174 vif
->type
!= NL80211_IFTYPE_WDS
)
178 * Update the beacon without locking. This is safe on PCI devices
179 * as they only update the beacon periodically here. This should
180 * never be called for USB devices.
182 WARN_ON(rt2x00_is_usb(rt2x00dev
));
183 rt2x00queue_update_beacon_locked(rt2x00dev
, vif
);
186 void rt2x00lib_beacondone(struct rt2x00_dev
*rt2x00dev
)
188 if (!test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
191 /* send buffered bc/mc frames out for every bssid */
192 ieee80211_iterate_active_interfaces_atomic(rt2x00dev
->hw
,
193 rt2x00lib_bc_buffer_iter
,
196 * Devices with pre tbtt interrupt don't need to update the beacon
197 * here as they will fetch the next beacon directly prior to
200 if (test_bit(DRIVER_SUPPORT_PRE_TBTT_INTERRUPT
, &rt2x00dev
->flags
))
203 /* fetch next beacon */
204 ieee80211_iterate_active_interfaces_atomic(rt2x00dev
->hw
,
205 rt2x00lib_beaconupdate_iter
,
208 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone
);
210 void rt2x00lib_pretbtt(struct rt2x00_dev
*rt2x00dev
)
212 if (!test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
215 /* fetch next beacon */
216 ieee80211_iterate_active_interfaces_atomic(rt2x00dev
->hw
,
217 rt2x00lib_beaconupdate_iter
,
220 EXPORT_SYMBOL_GPL(rt2x00lib_pretbtt
);
222 void rt2x00lib_dmastart(struct queue_entry
*entry
)
224 set_bit(ENTRY_OWNER_DEVICE_DATA
, &entry
->flags
);
225 rt2x00queue_index_inc(entry
->queue
, Q_INDEX
);
227 EXPORT_SYMBOL_GPL(rt2x00lib_dmastart
);
229 void rt2x00lib_dmadone(struct queue_entry
*entry
)
231 set_bit(ENTRY_DATA_STATUS_PENDING
, &entry
->flags
);
232 clear_bit(ENTRY_OWNER_DEVICE_DATA
, &entry
->flags
);
233 rt2x00queue_index_inc(entry
->queue
, Q_INDEX_DMA_DONE
);
235 EXPORT_SYMBOL_GPL(rt2x00lib_dmadone
);
237 void rt2x00lib_txdone(struct queue_entry
*entry
,
238 struct txdone_entry_desc
*txdesc
)
240 struct rt2x00_dev
*rt2x00dev
= entry
->queue
->rt2x00dev
;
241 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(entry
->skb
);
242 struct skb_frame_desc
*skbdesc
= get_skb_frame_desc(entry
->skb
);
243 unsigned int header_length
, i
;
244 u8 rate_idx
, rate_flags
, retry_rates
;
245 u8 skbdesc_flags
= skbdesc
->flags
;
251 rt2x00queue_unmap_skb(entry
);
254 * Remove the extra tx headroom from the skb.
256 skb_pull(entry
->skb
, rt2x00dev
->ops
->extra_tx_headroom
);
259 * Signal that the TX descriptor is no longer in the skb.
261 skbdesc
->flags
&= ~SKBDESC_DESC_IN_SKB
;
264 * Determine the length of 802.11 header.
266 header_length
= ieee80211_get_hdrlen_from_skb(entry
->skb
);
269 * Remove L2 padding which was added during
271 if (test_bit(DRIVER_REQUIRE_L2PAD
, &rt2x00dev
->flags
))
272 rt2x00queue_remove_l2pad(entry
->skb
, header_length
);
275 * If the IV/EIV data was stripped from the frame before it was
276 * passed to the hardware, we should now reinsert it again because
277 * mac80211 will expect the same data to be present it the
278 * frame as it was passed to us.
280 if (test_bit(CONFIG_SUPPORT_HW_CRYPTO
, &rt2x00dev
->flags
))
281 rt2x00crypto_tx_insert_iv(entry
->skb
, header_length
);
284 * Send frame to debugfs immediately, after this call is completed
285 * we are going to overwrite the skb->cb array.
287 rt2x00debug_dump_frame(rt2x00dev
, DUMP_FRAME_TXDONE
, entry
->skb
);
290 * Determine if the frame has been successfully transmitted.
293 test_bit(TXDONE_SUCCESS
, &txdesc
->flags
) ||
294 test_bit(TXDONE_UNKNOWN
, &txdesc
->flags
);
297 * Update TX statistics.
299 rt2x00dev
->link
.qual
.tx_success
+= success
;
300 rt2x00dev
->link
.qual
.tx_failed
+= !success
;
302 rate_idx
= skbdesc
->tx_rate_idx
;
303 rate_flags
= skbdesc
->tx_rate_flags
;
304 retry_rates
= test_bit(TXDONE_FALLBACK
, &txdesc
->flags
) ?
305 (txdesc
->retry
+ 1) : 1;
308 * Initialize TX status
310 memset(&tx_info
->status
, 0, sizeof(tx_info
->status
));
311 tx_info
->status
.ack_signal
= 0;
314 * Frame was send with retries, hardware tried
315 * different rates to send out the frame, at each
316 * retry it lowered the rate 1 step except when the
317 * lowest rate was used.
319 for (i
= 0; i
< retry_rates
&& i
< IEEE80211_TX_MAX_RATES
; i
++) {
320 tx_info
->status
.rates
[i
].idx
= rate_idx
- i
;
321 tx_info
->status
.rates
[i
].flags
= rate_flags
;
323 if (rate_idx
- i
== 0) {
325 * The lowest rate (index 0) was used until the
326 * number of max retries was reached.
328 tx_info
->status
.rates
[i
].count
= retry_rates
- i
;
332 tx_info
->status
.rates
[i
].count
= 1;
334 if (i
< (IEEE80211_TX_MAX_RATES
- 1))
335 tx_info
->status
.rates
[i
].idx
= -1; /* terminate */
337 if (!(tx_info
->flags
& IEEE80211_TX_CTL_NO_ACK
)) {
339 tx_info
->flags
|= IEEE80211_TX_STAT_ACK
;
341 rt2x00dev
->low_level_stats
.dot11ACKFailureCount
++;
345 * Every single frame has it's own tx status, hence report
346 * every frame as ampdu of size 1.
348 * TODO: if we can find out how many frames were aggregated
349 * by the hw we could provide the real ampdu_len to mac80211
350 * which would allow the rc algorithm to better decide on
351 * which rates are suitable.
353 if (tx_info
->flags
& IEEE80211_TX_CTL_AMPDU
) {
354 tx_info
->flags
|= IEEE80211_TX_STAT_AMPDU
;
355 tx_info
->status
.ampdu_len
= 1;
356 tx_info
->status
.ampdu_ack_len
= success
? 1 : 0;
359 if (rate_flags
& IEEE80211_TX_RC_USE_RTS_CTS
) {
361 rt2x00dev
->low_level_stats
.dot11RTSSuccessCount
++;
363 rt2x00dev
->low_level_stats
.dot11RTSFailureCount
++;
367 * Only send the status report to mac80211 when it's a frame
368 * that originated in mac80211. If this was a extra frame coming
369 * through a mac80211 library call (RTS/CTS) then we should not
370 * send the status report back.
372 if (!(skbdesc_flags
& SKBDESC_NOT_MAC80211
)) {
373 if (test_bit(DRIVER_REQUIRE_TASKLET_CONTEXT
, &rt2x00dev
->flags
))
374 ieee80211_tx_status(rt2x00dev
->hw
, entry
->skb
);
376 ieee80211_tx_status_ni(rt2x00dev
->hw
, entry
->skb
);
378 dev_kfree_skb_any(entry
->skb
);
381 * Make this entry available for reuse.
386 rt2x00dev
->ops
->lib
->clear_entry(entry
);
388 rt2x00queue_index_inc(entry
->queue
, Q_INDEX_DONE
);
391 * If the data queue was below the threshold before the txdone
392 * handler we must make sure the packet queue in the mac80211 stack
393 * is reenabled when the txdone handler has finished.
395 if (!rt2x00queue_threshold(entry
->queue
))
396 rt2x00queue_unpause_queue(entry
->queue
);
398 EXPORT_SYMBOL_GPL(rt2x00lib_txdone
);
400 void rt2x00lib_txdone_noinfo(struct queue_entry
*entry
, u32 status
)
402 struct txdone_entry_desc txdesc
;
405 __set_bit(status
, &txdesc
.flags
);
408 rt2x00lib_txdone(entry
, &txdesc
);
410 EXPORT_SYMBOL_GPL(rt2x00lib_txdone_noinfo
);
412 static int rt2x00lib_rxdone_read_signal(struct rt2x00_dev
*rt2x00dev
,
413 struct rxdone_entry_desc
*rxdesc
)
415 struct ieee80211_supported_band
*sband
;
416 const struct rt2x00_rate
*rate
;
418 int signal
= rxdesc
->signal
;
419 int type
= (rxdesc
->dev_flags
& RXDONE_SIGNAL_MASK
);
421 switch (rxdesc
->rate_mode
) {
425 * For non-HT rates the MCS value needs to contain the
426 * actually used rate modulation (CCK or OFDM).
428 if (rxdesc
->dev_flags
& RXDONE_SIGNAL_MCS
)
429 signal
= RATE_MCS(rxdesc
->rate_mode
, signal
);
431 sband
= &rt2x00dev
->bands
[rt2x00dev
->curr_band
];
432 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
433 rate
= rt2x00_get_rate(sband
->bitrates
[i
].hw_value
);
434 if (((type
== RXDONE_SIGNAL_PLCP
) &&
435 (rate
->plcp
== signal
)) ||
436 ((type
== RXDONE_SIGNAL_BITRATE
) &&
437 (rate
->bitrate
== signal
)) ||
438 ((type
== RXDONE_SIGNAL_MCS
) &&
439 (rate
->mcs
== signal
))) {
444 case RATE_MODE_HT_MIX
:
445 case RATE_MODE_HT_GREENFIELD
:
446 if (signal
>= 0 && signal
<= 76)
453 WARNING(rt2x00dev
, "Frame received with unrecognized signal, "
454 "mode=0x%.4x, signal=0x%.4x, type=%d.\n",
455 rxdesc
->rate_mode
, signal
, type
);
459 void rt2x00lib_rxdone(struct queue_entry
*entry
)
461 struct rt2x00_dev
*rt2x00dev
= entry
->queue
->rt2x00dev
;
462 struct rxdone_entry_desc rxdesc
;
464 struct ieee80211_rx_status
*rx_status
;
465 unsigned int header_length
;
468 if (!test_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
) ||
469 !test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
472 if (test_bit(ENTRY_DATA_IO_FAILED
, &entry
->flags
))
476 * Allocate a new sk_buffer. If no new buffer available, drop the
477 * received frame and reuse the existing buffer.
479 skb
= rt2x00queue_alloc_rxskb(entry
);
486 rt2x00queue_unmap_skb(entry
);
489 * Extract the RXD details.
491 memset(&rxdesc
, 0, sizeof(rxdesc
));
492 rt2x00dev
->ops
->lib
->fill_rxdone(entry
, &rxdesc
);
495 * The data behind the ieee80211 header must be
496 * aligned on a 4 byte boundary.
498 header_length
= ieee80211_get_hdrlen_from_skb(entry
->skb
);
501 * Hardware might have stripped the IV/EIV/ICV data,
502 * in that case it is possible that the data was
503 * provided separately (through hardware descriptor)
504 * in which case we should reinsert the data into the frame.
506 if ((rxdesc
.dev_flags
& RXDONE_CRYPTO_IV
) &&
507 (rxdesc
.flags
& RX_FLAG_IV_STRIPPED
))
508 rt2x00crypto_rx_insert_iv(entry
->skb
, header_length
,
510 else if (header_length
&&
511 (rxdesc
.size
> header_length
) &&
512 (rxdesc
.dev_flags
& RXDONE_L2PAD
))
513 rt2x00queue_remove_l2pad(entry
->skb
, header_length
);
515 rt2x00queue_align_payload(entry
->skb
, header_length
);
517 /* Trim buffer to correct size */
518 skb_trim(entry
->skb
, rxdesc
.size
);
521 * Translate the signal to the correct bitrate index.
523 rate_idx
= rt2x00lib_rxdone_read_signal(rt2x00dev
, &rxdesc
);
524 if (rxdesc
.rate_mode
== RATE_MODE_HT_MIX
||
525 rxdesc
.rate_mode
== RATE_MODE_HT_GREENFIELD
)
526 rxdesc
.flags
|= RX_FLAG_HT
;
529 * Update extra components
531 rt2x00link_update_stats(rt2x00dev
, entry
->skb
, &rxdesc
);
532 rt2x00debug_update_crypto(rt2x00dev
, &rxdesc
);
533 rt2x00debug_dump_frame(rt2x00dev
, DUMP_FRAME_RXDONE
, entry
->skb
);
536 * Initialize RX status information, and send frame
539 rx_status
= IEEE80211_SKB_RXCB(entry
->skb
);
540 rx_status
->mactime
= rxdesc
.timestamp
;
541 rx_status
->band
= rt2x00dev
->curr_band
;
542 rx_status
->freq
= rt2x00dev
->curr_freq
;
543 rx_status
->rate_idx
= rate_idx
;
544 rx_status
->signal
= rxdesc
.rssi
;
545 rx_status
->flag
= rxdesc
.flags
;
546 rx_status
->antenna
= rt2x00dev
->link
.ant
.active
.rx
;
548 ieee80211_rx_ni(rt2x00dev
->hw
, entry
->skb
);
551 * Replace the skb with the freshly allocated one.
557 rt2x00queue_index_inc(entry
->queue
, Q_INDEX_DONE
);
558 if (test_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
) &&
559 test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
560 rt2x00dev
->ops
->lib
->clear_entry(entry
);
562 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone
);
565 * Driver initialization handlers.
567 const struct rt2x00_rate rt2x00_supported_rates
[12] = {
569 .flags
= DEV_RATE_CCK
,
573 .mcs
= RATE_MCS(RATE_MODE_CCK
, 0),
576 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
,
580 .mcs
= RATE_MCS(RATE_MODE_CCK
, 1),
583 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
,
587 .mcs
= RATE_MCS(RATE_MODE_CCK
, 2),
590 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
,
594 .mcs
= RATE_MCS(RATE_MODE_CCK
, 3),
597 .flags
= DEV_RATE_OFDM
,
601 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 0),
604 .flags
= DEV_RATE_OFDM
,
608 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 1),
611 .flags
= DEV_RATE_OFDM
,
615 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 2),
618 .flags
= DEV_RATE_OFDM
,
622 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 3),
625 .flags
= DEV_RATE_OFDM
,
629 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 4),
632 .flags
= DEV_RATE_OFDM
,
636 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 5),
639 .flags
= DEV_RATE_OFDM
,
643 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 6),
646 .flags
= DEV_RATE_OFDM
,
650 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 7),
654 static void rt2x00lib_channel(struct ieee80211_channel
*entry
,
655 const int channel
, const int tx_power
,
658 /* XXX: this assumption about the band is wrong for 802.11j */
659 entry
->band
= channel
<= 14 ? IEEE80211_BAND_2GHZ
: IEEE80211_BAND_5GHZ
;
660 entry
->center_freq
= ieee80211_channel_to_frequency(channel
,
662 entry
->hw_value
= value
;
663 entry
->max_power
= tx_power
;
664 entry
->max_antenna_gain
= 0xff;
667 static void rt2x00lib_rate(struct ieee80211_rate
*entry
,
668 const u16 index
, const struct rt2x00_rate
*rate
)
671 entry
->bitrate
= rate
->bitrate
;
672 entry
->hw_value
= index
;
673 entry
->hw_value_short
= index
;
675 if (rate
->flags
& DEV_RATE_SHORT_PREAMBLE
)
676 entry
->flags
|= IEEE80211_RATE_SHORT_PREAMBLE
;
679 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev
*rt2x00dev
,
680 struct hw_mode_spec
*spec
)
682 struct ieee80211_hw
*hw
= rt2x00dev
->hw
;
683 struct ieee80211_channel
*channels
;
684 struct ieee80211_rate
*rates
;
685 unsigned int num_rates
;
689 if (spec
->supported_rates
& SUPPORT_RATE_CCK
)
691 if (spec
->supported_rates
& SUPPORT_RATE_OFDM
)
694 channels
= kzalloc(sizeof(*channels
) * spec
->num_channels
, GFP_KERNEL
);
698 rates
= kzalloc(sizeof(*rates
) * num_rates
, GFP_KERNEL
);
700 goto exit_free_channels
;
703 * Initialize Rate list.
705 for (i
= 0; i
< num_rates
; i
++)
706 rt2x00lib_rate(&rates
[i
], i
, rt2x00_get_rate(i
));
709 * Initialize Channel list.
711 for (i
= 0; i
< spec
->num_channels
; i
++) {
712 rt2x00lib_channel(&channels
[i
],
713 spec
->channels
[i
].channel
,
714 spec
->channels_info
[i
].max_power
, i
);
718 * Intitialize 802.11b, 802.11g
722 if (spec
->supported_bands
& SUPPORT_BAND_2GHZ
) {
723 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].n_channels
= 14;
724 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].n_bitrates
= num_rates
;
725 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].channels
= channels
;
726 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].bitrates
= rates
;
727 hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
] =
728 &rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
];
729 memcpy(&rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].ht_cap
,
730 &spec
->ht
, sizeof(spec
->ht
));
734 * Intitialize 802.11a
736 * Channels: OFDM, UNII, HiperLAN2.
738 if (spec
->supported_bands
& SUPPORT_BAND_5GHZ
) {
739 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].n_channels
=
740 spec
->num_channels
- 14;
741 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].n_bitrates
=
743 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].channels
= &channels
[14];
744 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].bitrates
= &rates
[4];
745 hw
->wiphy
->bands
[IEEE80211_BAND_5GHZ
] =
746 &rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
];
747 memcpy(&rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].ht_cap
,
748 &spec
->ht
, sizeof(spec
->ht
));
755 ERROR(rt2x00dev
, "Allocation ieee80211 modes failed.\n");
759 static void rt2x00lib_remove_hw(struct rt2x00_dev
*rt2x00dev
)
761 if (test_bit(DEVICE_STATE_REGISTERED_HW
, &rt2x00dev
->flags
))
762 ieee80211_unregister_hw(rt2x00dev
->hw
);
764 if (likely(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
])) {
765 kfree(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
]->channels
);
766 kfree(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
]->bitrates
);
767 rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
] = NULL
;
768 rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_5GHZ
] = NULL
;
771 kfree(rt2x00dev
->spec
.channels_info
);
774 static int rt2x00lib_probe_hw(struct rt2x00_dev
*rt2x00dev
)
776 struct hw_mode_spec
*spec
= &rt2x00dev
->spec
;
779 if (test_bit(DEVICE_STATE_REGISTERED_HW
, &rt2x00dev
->flags
))
783 * Initialize HW modes.
785 status
= rt2x00lib_probe_hw_modes(rt2x00dev
, spec
);
790 * Initialize HW fields.
792 rt2x00dev
->hw
->queues
= rt2x00dev
->ops
->tx_queues
;
795 * Initialize extra TX headroom required.
797 rt2x00dev
->hw
->extra_tx_headroom
=
798 max_t(unsigned int, IEEE80211_TX_STATUS_HEADROOM
,
799 rt2x00dev
->ops
->extra_tx_headroom
);
802 * Take TX headroom required for alignment into account.
804 if (test_bit(DRIVER_REQUIRE_L2PAD
, &rt2x00dev
->flags
))
805 rt2x00dev
->hw
->extra_tx_headroom
+= RT2X00_L2PAD_SIZE
;
806 else if (test_bit(DRIVER_REQUIRE_DMA
, &rt2x00dev
->flags
))
807 rt2x00dev
->hw
->extra_tx_headroom
+= RT2X00_ALIGN_SIZE
;
810 * Allocate tx status FIFO for driver use.
812 if (test_bit(DRIVER_REQUIRE_TXSTATUS_FIFO
, &rt2x00dev
->flags
)) {
814 * Allocate txstatus fifo and tasklet, we use a size of 512
815 * for the kfifo which is big enough to store 512/4=128 tx
816 * status reports. In the worst case (tx status for all tx
817 * queues gets reported before we've got a chance to handle
818 * them) 24*4=384 tx status reports need to be cached.
820 status
= kfifo_alloc(&rt2x00dev
->txstatus_fifo
, 512,
827 * Initialize tasklets if used by the driver. Tasklets are
828 * disabled until the interrupts are turned on. The driver
829 * has to handle that.
831 #define RT2X00_TASKLET_INIT(taskletname) \
832 if (rt2x00dev->ops->lib->taskletname) { \
833 tasklet_init(&rt2x00dev->taskletname, \
834 rt2x00dev->ops->lib->taskletname, \
835 (unsigned long)rt2x00dev); \
836 tasklet_disable(&rt2x00dev->taskletname); \
839 RT2X00_TASKLET_INIT(txstatus_tasklet
);
840 RT2X00_TASKLET_INIT(pretbtt_tasklet
);
841 RT2X00_TASKLET_INIT(tbtt_tasklet
);
842 RT2X00_TASKLET_INIT(rxdone_tasklet
);
843 RT2X00_TASKLET_INIT(autowake_tasklet
);
845 #undef RT2X00_TASKLET_INIT
850 status
= ieee80211_register_hw(rt2x00dev
->hw
);
854 set_bit(DEVICE_STATE_REGISTERED_HW
, &rt2x00dev
->flags
);
860 * Initialization/uninitialization handlers.
862 static void rt2x00lib_uninitialize(struct rt2x00_dev
*rt2x00dev
)
864 if (!test_and_clear_bit(DEVICE_STATE_INITIALIZED
, &rt2x00dev
->flags
))
868 * Unregister extra components.
870 rt2x00rfkill_unregister(rt2x00dev
);
873 * Allow the HW to uninitialize.
875 rt2x00dev
->ops
->lib
->uninitialize(rt2x00dev
);
878 * Free allocated queue entries.
880 rt2x00queue_uninitialize(rt2x00dev
);
883 static int rt2x00lib_initialize(struct rt2x00_dev
*rt2x00dev
)
887 if (test_bit(DEVICE_STATE_INITIALIZED
, &rt2x00dev
->flags
))
891 * Allocate all queue entries.
893 status
= rt2x00queue_initialize(rt2x00dev
);
898 * Initialize the device.
900 status
= rt2x00dev
->ops
->lib
->initialize(rt2x00dev
);
902 rt2x00queue_uninitialize(rt2x00dev
);
906 set_bit(DEVICE_STATE_INITIALIZED
, &rt2x00dev
->flags
);
909 * Register the extra components.
911 rt2x00rfkill_register(rt2x00dev
);
916 int rt2x00lib_start(struct rt2x00_dev
*rt2x00dev
)
920 if (test_bit(DEVICE_STATE_STARTED
, &rt2x00dev
->flags
))
924 * If this is the first interface which is added,
925 * we should load the firmware now.
927 retval
= rt2x00lib_load_firmware(rt2x00dev
);
932 * Initialize the device.
934 retval
= rt2x00lib_initialize(rt2x00dev
);
938 rt2x00dev
->intf_ap_count
= 0;
939 rt2x00dev
->intf_sta_count
= 0;
940 rt2x00dev
->intf_associated
= 0;
942 /* Enable the radio */
943 retval
= rt2x00lib_enable_radio(rt2x00dev
);
947 set_bit(DEVICE_STATE_STARTED
, &rt2x00dev
->flags
);
952 void rt2x00lib_stop(struct rt2x00_dev
*rt2x00dev
)
954 if (!test_and_clear_bit(DEVICE_STATE_STARTED
, &rt2x00dev
->flags
))
958 * Perhaps we can add something smarter here,
959 * but for now just disabling the radio should do.
961 rt2x00lib_disable_radio(rt2x00dev
);
963 rt2x00dev
->intf_ap_count
= 0;
964 rt2x00dev
->intf_sta_count
= 0;
965 rt2x00dev
->intf_associated
= 0;
969 * driver allocation handlers.
971 int rt2x00lib_probe_dev(struct rt2x00_dev
*rt2x00dev
)
973 int retval
= -ENOMEM
;
975 spin_lock_init(&rt2x00dev
->irqmask_lock
);
976 mutex_init(&rt2x00dev
->csr_mutex
);
978 set_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
);
981 * Make room for rt2x00_intf inside the per-interface
982 * structure ieee80211_vif.
984 rt2x00dev
->hw
->vif_data_size
= sizeof(struct rt2x00_intf
);
987 * Determine which operating modes are supported, all modes
988 * which require beaconing, depend on the availability of
991 rt2x00dev
->hw
->wiphy
->interface_modes
= BIT(NL80211_IFTYPE_STATION
);
992 if (rt2x00dev
->ops
->bcn
->entry_num
> 0)
993 rt2x00dev
->hw
->wiphy
->interface_modes
|=
994 BIT(NL80211_IFTYPE_ADHOC
) |
995 BIT(NL80211_IFTYPE_AP
) |
996 BIT(NL80211_IFTYPE_MESH_POINT
) |
997 BIT(NL80211_IFTYPE_WDS
);
1002 rt2x00dev
->workqueue
=
1003 alloc_ordered_workqueue(wiphy_name(rt2x00dev
->hw
->wiphy
), 0);
1004 if (!rt2x00dev
->workqueue
) {
1009 INIT_WORK(&rt2x00dev
->intf_work
, rt2x00lib_intf_scheduled
);
1012 * Let the driver probe the device to detect the capabilities.
1014 retval
= rt2x00dev
->ops
->lib
->probe_hw(rt2x00dev
);
1016 ERROR(rt2x00dev
, "Failed to allocate device.\n");
1021 * Allocate queue array.
1023 retval
= rt2x00queue_allocate(rt2x00dev
);
1028 * Initialize ieee80211 structure.
1030 retval
= rt2x00lib_probe_hw(rt2x00dev
);
1032 ERROR(rt2x00dev
, "Failed to initialize hw.\n");
1037 * Register extra components.
1039 rt2x00link_register(rt2x00dev
);
1040 rt2x00leds_register(rt2x00dev
);
1041 rt2x00debug_register(rt2x00dev
);
1046 rt2x00lib_remove_dev(rt2x00dev
);
1050 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev
);
1052 void rt2x00lib_remove_dev(struct rt2x00_dev
*rt2x00dev
)
1054 clear_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
);
1059 rt2x00lib_disable_radio(rt2x00dev
);
1064 cancel_work_sync(&rt2x00dev
->intf_work
);
1065 if (rt2x00_is_usb(rt2x00dev
)) {
1066 cancel_work_sync(&rt2x00dev
->rxdone_work
);
1067 cancel_work_sync(&rt2x00dev
->txdone_work
);
1069 destroy_workqueue(rt2x00dev
->workqueue
);
1072 * Free the tx status fifo.
1074 kfifo_free(&rt2x00dev
->txstatus_fifo
);
1077 * Kill the tx status tasklet.
1079 tasklet_kill(&rt2x00dev
->txstatus_tasklet
);
1080 tasklet_kill(&rt2x00dev
->pretbtt_tasklet
);
1081 tasklet_kill(&rt2x00dev
->tbtt_tasklet
);
1082 tasklet_kill(&rt2x00dev
->rxdone_tasklet
);
1083 tasklet_kill(&rt2x00dev
->autowake_tasklet
);
1086 * Uninitialize device.
1088 rt2x00lib_uninitialize(rt2x00dev
);
1091 * Free extra components
1093 rt2x00debug_deregister(rt2x00dev
);
1094 rt2x00leds_unregister(rt2x00dev
);
1097 * Free ieee80211_hw memory.
1099 rt2x00lib_remove_hw(rt2x00dev
);
1102 * Free firmware image.
1104 rt2x00lib_free_firmware(rt2x00dev
);
1107 * Free queue structures.
1109 rt2x00queue_free(rt2x00dev
);
1111 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev
);
1114 * Device state handlers
1117 int rt2x00lib_suspend(struct rt2x00_dev
*rt2x00dev
, pm_message_t state
)
1119 NOTICE(rt2x00dev
, "Going to sleep.\n");
1122 * Prevent mac80211 from accessing driver while suspended.
1124 if (!test_and_clear_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
))
1128 * Cleanup as much as possible.
1130 rt2x00lib_uninitialize(rt2x00dev
);
1133 * Suspend/disable extra components.
1135 rt2x00leds_suspend(rt2x00dev
);
1136 rt2x00debug_deregister(rt2x00dev
);
1139 * Set device mode to sleep for power management,
1140 * on some hardware this call seems to consistently fail.
1141 * From the specifications it is hard to tell why it fails,
1142 * and if this is a "bad thing".
1143 * Overall it is safe to just ignore the failure and
1144 * continue suspending. The only downside is that the
1145 * device will not be in optimal power save mode, but with
1146 * the radio and the other components already disabled the
1147 * device is as good as disabled.
1149 if (rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_SLEEP
))
1150 WARNING(rt2x00dev
, "Device failed to enter sleep state, "
1151 "continue suspending.\n");
1155 EXPORT_SYMBOL_GPL(rt2x00lib_suspend
);
1157 int rt2x00lib_resume(struct rt2x00_dev
*rt2x00dev
)
1159 NOTICE(rt2x00dev
, "Waking up.\n");
1162 * Restore/enable extra components.
1164 rt2x00debug_register(rt2x00dev
);
1165 rt2x00leds_resume(rt2x00dev
);
1168 * We are ready again to receive requests from mac80211.
1170 set_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
);
1174 EXPORT_SYMBOL_GPL(rt2x00lib_resume
);
1175 #endif /* CONFIG_PM */
1178 * rt2x00lib module information.
1180 MODULE_AUTHOR(DRV_PROJECT
);
1181 MODULE_VERSION(DRV_VERSION
);
1182 MODULE_DESCRIPTION("rt2x00 library");
1183 MODULE_LICENSE("GPL");