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 rt2x00lib_toggle_rx(rt2x00dev
, STATE_RADIO_RX_ON
);
74 * Start watchdog monitoring.
76 rt2x00link_start_watchdog(rt2x00dev
);
79 * Start the TX queues.
81 ieee80211_wake_queues(rt2x00dev
->hw
);
86 void rt2x00lib_disable_radio(struct rt2x00_dev
*rt2x00dev
)
88 if (!test_and_clear_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
92 * Stop the TX queues in mac80211.
94 ieee80211_stop_queues(rt2x00dev
->hw
);
95 rt2x00queue_stop_queues(rt2x00dev
);
98 * Stop watchdog monitoring.
100 rt2x00link_stop_watchdog(rt2x00dev
);
105 rt2x00lib_toggle_rx(rt2x00dev
, STATE_RADIO_RX_OFF
);
110 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_OFF
);
111 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_IRQ_OFF
);
112 rt2x00led_led_activity(rt2x00dev
, false);
113 rt2x00leds_led_radio(rt2x00dev
, false);
116 void rt2x00lib_toggle_rx(struct rt2x00_dev
*rt2x00dev
, enum dev_state state
)
119 * When we are disabling the RX, we should also stop the link tuner.
121 if (state
== STATE_RADIO_RX_OFF
)
122 rt2x00link_stop_tuner(rt2x00dev
);
124 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, state
);
127 * When we are enabling the RX, we should also start the link tuner.
129 if (state
== STATE_RADIO_RX_ON
)
130 rt2x00link_start_tuner(rt2x00dev
);
133 static void rt2x00lib_intf_scheduled_iter(void *data
, u8
*mac
,
134 struct ieee80211_vif
*vif
)
136 struct rt2x00_dev
*rt2x00dev
= data
;
137 struct rt2x00_intf
*intf
= vif_to_intf(vif
);
141 * Copy all data we need during this action under the protection
142 * of a spinlock. Otherwise race conditions might occur which results
143 * into an invalid configuration.
145 spin_lock(&intf
->lock
);
147 delayed_flags
= intf
->delayed_flags
;
148 intf
->delayed_flags
= 0;
150 spin_unlock(&intf
->lock
);
153 * It is possible the radio was disabled while the work had been
154 * scheduled. If that happens we should return here immediately,
155 * note that in the spinlock protected area above the delayed_flags
156 * have been cleared correctly.
158 if (!test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
161 if (delayed_flags
& DELAYED_UPDATE_BEACON
)
162 rt2x00queue_update_beacon(rt2x00dev
, vif
, true);
165 static void rt2x00lib_intf_scheduled(struct work_struct
*work
)
167 struct rt2x00_dev
*rt2x00dev
=
168 container_of(work
, struct rt2x00_dev
, intf_work
);
171 * Iterate over each interface and perform the
172 * requested configurations.
174 ieee80211_iterate_active_interfaces(rt2x00dev
->hw
,
175 rt2x00lib_intf_scheduled_iter
,
180 * Interrupt context handlers.
182 static void rt2x00lib_bc_buffer_iter(void *data
, u8
*mac
,
183 struct ieee80211_vif
*vif
)
185 struct rt2x00_dev
*rt2x00dev
= data
;
189 * Only AP mode interfaces do broad- and multicast buffering
191 if (vif
->type
!= NL80211_IFTYPE_AP
)
195 * Send out buffered broad- and multicast frames
197 skb
= ieee80211_get_buffered_bc(rt2x00dev
->hw
, vif
);
199 rt2x00mac_tx(rt2x00dev
->hw
, skb
);
200 skb
= ieee80211_get_buffered_bc(rt2x00dev
->hw
, vif
);
204 static void rt2x00lib_beaconupdate_iter(void *data
, u8
*mac
,
205 struct ieee80211_vif
*vif
)
207 struct rt2x00_dev
*rt2x00dev
= data
;
209 if (vif
->type
!= NL80211_IFTYPE_AP
&&
210 vif
->type
!= NL80211_IFTYPE_ADHOC
&&
211 vif
->type
!= NL80211_IFTYPE_MESH_POINT
&&
212 vif
->type
!= NL80211_IFTYPE_WDS
)
215 rt2x00queue_update_beacon(rt2x00dev
, vif
, true);
218 void rt2x00lib_beacondone(struct rt2x00_dev
*rt2x00dev
)
220 if (!test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
223 /* send buffered bc/mc frames out for every bssid */
224 ieee80211_iterate_active_interfaces(rt2x00dev
->hw
,
225 rt2x00lib_bc_buffer_iter
,
228 * Devices with pre tbtt interrupt don't need to update the beacon
229 * here as they will fetch the next beacon directly prior to
232 if (test_bit(DRIVER_SUPPORT_PRE_TBTT_INTERRUPT
, &rt2x00dev
->flags
))
235 /* fetch next beacon */
236 ieee80211_iterate_active_interfaces(rt2x00dev
->hw
,
237 rt2x00lib_beaconupdate_iter
,
240 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone
);
242 void rt2x00lib_pretbtt(struct rt2x00_dev
*rt2x00dev
)
244 if (!test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
247 /* fetch next beacon */
248 ieee80211_iterate_active_interfaces(rt2x00dev
->hw
,
249 rt2x00lib_beaconupdate_iter
,
252 EXPORT_SYMBOL_GPL(rt2x00lib_pretbtt
);
254 void rt2x00lib_dmadone(struct queue_entry
*entry
)
256 rt2x00queue_index_inc(entry
->queue
, Q_INDEX_DMA_DONE
);
258 EXPORT_SYMBOL_GPL(rt2x00lib_dmadone
);
260 void rt2x00lib_txdone(struct queue_entry
*entry
,
261 struct txdone_entry_desc
*txdesc
)
263 struct rt2x00_dev
*rt2x00dev
= entry
->queue
->rt2x00dev
;
264 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(entry
->skb
);
265 struct skb_frame_desc
*skbdesc
= get_skb_frame_desc(entry
->skb
);
266 enum data_queue_qid qid
= skb_get_queue_mapping(entry
->skb
);
267 unsigned int header_length
= ieee80211_get_hdrlen_from_skb(entry
->skb
);
268 u8 rate_idx
, rate_flags
, retry_rates
;
269 u8 skbdesc_flags
= skbdesc
->flags
;
276 rt2x00queue_unmap_skb(entry
);
279 * Remove the extra tx headroom from the skb.
281 skb_pull(entry
->skb
, rt2x00dev
->ops
->extra_tx_headroom
);
284 * Signal that the TX descriptor is no longer in the skb.
286 skbdesc
->flags
&= ~SKBDESC_DESC_IN_SKB
;
289 * Remove L2 padding which was added during
291 if (test_bit(DRIVER_REQUIRE_L2PAD
, &rt2x00dev
->flags
))
292 rt2x00queue_remove_l2pad(entry
->skb
, header_length
);
295 * If the IV/EIV data was stripped from the frame before it was
296 * passed to the hardware, we should now reinsert it again because
297 * mac80211 will expect the same data to be present it the
298 * frame as it was passed to us.
300 if (test_bit(CONFIG_SUPPORT_HW_CRYPTO
, &rt2x00dev
->flags
))
301 rt2x00crypto_tx_insert_iv(entry
->skb
, header_length
);
304 * Send frame to debugfs immediately, after this call is completed
305 * we are going to overwrite the skb->cb array.
307 rt2x00debug_dump_frame(rt2x00dev
, DUMP_FRAME_TXDONE
, entry
->skb
);
310 * Determine if the frame has been successfully transmitted.
313 test_bit(TXDONE_SUCCESS
, &txdesc
->flags
) ||
314 test_bit(TXDONE_UNKNOWN
, &txdesc
->flags
);
317 * Update TX statistics.
319 rt2x00dev
->link
.qual
.tx_success
+= success
;
320 rt2x00dev
->link
.qual
.tx_failed
+= !success
;
322 rate_idx
= skbdesc
->tx_rate_idx
;
323 rate_flags
= skbdesc
->tx_rate_flags
;
324 retry_rates
= test_bit(TXDONE_FALLBACK
, &txdesc
->flags
) ?
325 (txdesc
->retry
+ 1) : 1;
328 * Initialize TX status
330 memset(&tx_info
->status
, 0, sizeof(tx_info
->status
));
331 tx_info
->status
.ack_signal
= 0;
334 * Frame was send with retries, hardware tried
335 * different rates to send out the frame, at each
336 * retry it lowered the rate 1 step except when the
337 * lowest rate was used.
339 for (i
= 0; i
< retry_rates
&& i
< IEEE80211_TX_MAX_RATES
; i
++) {
340 tx_info
->status
.rates
[i
].idx
= rate_idx
- i
;
341 tx_info
->status
.rates
[i
].flags
= rate_flags
;
343 if (rate_idx
- i
== 0) {
345 * The lowest rate (index 0) was used until the
346 * number of max retries was reached.
348 tx_info
->status
.rates
[i
].count
= retry_rates
- i
;
352 tx_info
->status
.rates
[i
].count
= 1;
354 if (i
< (IEEE80211_TX_MAX_RATES
- 1))
355 tx_info
->status
.rates
[i
].idx
= -1; /* terminate */
357 if (!(tx_info
->flags
& IEEE80211_TX_CTL_NO_ACK
)) {
359 tx_info
->flags
|= IEEE80211_TX_STAT_ACK
;
361 rt2x00dev
->low_level_stats
.dot11ACKFailureCount
++;
365 * Every single frame has it's own tx status, hence report
366 * every frame as ampdu of size 1.
368 * TODO: if we can find out how many frames were aggregated
369 * by the hw we could provide the real ampdu_len to mac80211
370 * which would allow the rc algorithm to better decide on
371 * which rates are suitable.
373 if (tx_info
->flags
& IEEE80211_TX_CTL_AMPDU
) {
374 tx_info
->flags
|= IEEE80211_TX_STAT_AMPDU
;
375 tx_info
->status
.ampdu_len
= 1;
376 tx_info
->status
.ampdu_ack_len
= success
? 1 : 0;
379 if (rate_flags
& IEEE80211_TX_RC_USE_RTS_CTS
) {
381 rt2x00dev
->low_level_stats
.dot11RTSSuccessCount
++;
383 rt2x00dev
->low_level_stats
.dot11RTSFailureCount
++;
387 * Only send the status report to mac80211 when it's a frame
388 * that originated in mac80211. If this was a extra frame coming
389 * through a mac80211 library call (RTS/CTS) then we should not
390 * send the status report back.
392 if (!(skbdesc_flags
& SKBDESC_NOT_MAC80211
))
393 ieee80211_tx_status(rt2x00dev
->hw
, entry
->skb
);
395 dev_kfree_skb_any(entry
->skb
);
398 * Make this entry available for reuse.
403 rt2x00dev
->ops
->lib
->clear_entry(entry
);
405 rt2x00queue_index_inc(entry
->queue
, Q_INDEX_DONE
);
408 * If the data queue was below the threshold before the txdone
409 * handler we must make sure the packet queue in the mac80211 stack
410 * is reenabled when the txdone handler has finished.
412 if (!rt2x00queue_threshold(entry
->queue
))
413 ieee80211_wake_queue(rt2x00dev
->hw
, qid
);
415 EXPORT_SYMBOL_GPL(rt2x00lib_txdone
);
417 void rt2x00lib_txdone_noinfo(struct queue_entry
*entry
, u32 status
)
419 struct txdone_entry_desc txdesc
;
422 __set_bit(status
, &txdesc
.flags
);
425 rt2x00lib_txdone(entry
, &txdesc
);
427 EXPORT_SYMBOL_GPL(rt2x00lib_txdone_noinfo
);
429 static int rt2x00lib_rxdone_read_signal(struct rt2x00_dev
*rt2x00dev
,
430 struct rxdone_entry_desc
*rxdesc
)
432 struct ieee80211_supported_band
*sband
;
433 const struct rt2x00_rate
*rate
;
435 int signal
= rxdesc
->signal
;
436 int type
= (rxdesc
->dev_flags
& RXDONE_SIGNAL_MASK
);
438 switch (rxdesc
->rate_mode
) {
442 * For non-HT rates the MCS value needs to contain the
443 * actually used rate modulation (CCK or OFDM).
445 if (rxdesc
->dev_flags
& RXDONE_SIGNAL_MCS
)
446 signal
= RATE_MCS(rxdesc
->rate_mode
, signal
);
448 sband
= &rt2x00dev
->bands
[rt2x00dev
->curr_band
];
449 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
450 rate
= rt2x00_get_rate(sband
->bitrates
[i
].hw_value
);
451 if (((type
== RXDONE_SIGNAL_PLCP
) &&
452 (rate
->plcp
== signal
)) ||
453 ((type
== RXDONE_SIGNAL_BITRATE
) &&
454 (rate
->bitrate
== signal
)) ||
455 ((type
== RXDONE_SIGNAL_MCS
) &&
456 (rate
->mcs
== signal
))) {
461 case RATE_MODE_HT_MIX
:
462 case RATE_MODE_HT_GREENFIELD
:
463 if (signal
>= 0 && signal
<= 76)
470 WARNING(rt2x00dev
, "Frame received with unrecognized signal, "
471 "mode=0x%.4x, signal=0x%.4x, type=%d.\n",
472 rxdesc
->rate_mode
, signal
, type
);
476 void rt2x00lib_rxdone(struct queue_entry
*entry
)
478 struct rt2x00_dev
*rt2x00dev
= entry
->queue
->rt2x00dev
;
479 struct rxdone_entry_desc rxdesc
;
481 struct ieee80211_rx_status
*rx_status
;
482 unsigned int header_length
;
485 if (test_bit(ENTRY_DATA_IO_FAILED
, &entry
->flags
))
489 * Allocate a new sk_buffer. If no new buffer available, drop the
490 * received frame and reuse the existing buffer.
492 skb
= rt2x00queue_alloc_rxskb(entry
);
499 rt2x00queue_unmap_skb(entry
);
502 * Extract the RXD details.
504 memset(&rxdesc
, 0, sizeof(rxdesc
));
505 rt2x00dev
->ops
->lib
->fill_rxdone(entry
, &rxdesc
);
508 * The data behind the ieee80211 header must be
509 * aligned on a 4 byte boundary.
511 header_length
= ieee80211_get_hdrlen_from_skb(entry
->skb
);
514 * Hardware might have stripped the IV/EIV/ICV data,
515 * in that case it is possible that the data was
516 * provided separately (through hardware descriptor)
517 * in which case we should reinsert the data into the frame.
519 if ((rxdesc
.dev_flags
& RXDONE_CRYPTO_IV
) &&
520 (rxdesc
.flags
& RX_FLAG_IV_STRIPPED
))
521 rt2x00crypto_rx_insert_iv(entry
->skb
, header_length
,
523 else if (header_length
&&
524 (rxdesc
.size
> header_length
) &&
525 (rxdesc
.dev_flags
& RXDONE_L2PAD
))
526 rt2x00queue_remove_l2pad(entry
->skb
, header_length
);
528 rt2x00queue_align_payload(entry
->skb
, header_length
);
530 /* Trim buffer to correct size */
531 skb_trim(entry
->skb
, rxdesc
.size
);
534 * Translate the signal to the correct bitrate index.
536 rate_idx
= rt2x00lib_rxdone_read_signal(rt2x00dev
, &rxdesc
);
537 if (rxdesc
.rate_mode
== RATE_MODE_HT_MIX
||
538 rxdesc
.rate_mode
== RATE_MODE_HT_GREENFIELD
)
539 rxdesc
.flags
|= RX_FLAG_HT
;
542 * Update extra components
544 rt2x00link_update_stats(rt2x00dev
, entry
->skb
, &rxdesc
);
545 rt2x00debug_update_crypto(rt2x00dev
, &rxdesc
);
546 rt2x00debug_dump_frame(rt2x00dev
, DUMP_FRAME_RXDONE
, entry
->skb
);
549 * Initialize RX status information, and send frame
552 rx_status
= IEEE80211_SKB_RXCB(entry
->skb
);
553 rx_status
->mactime
= rxdesc
.timestamp
;
554 rx_status
->band
= rt2x00dev
->curr_band
;
555 rx_status
->freq
= rt2x00dev
->curr_freq
;
556 rx_status
->rate_idx
= rate_idx
;
557 rx_status
->signal
= rxdesc
.rssi
;
558 rx_status
->flag
= rxdesc
.flags
;
559 rx_status
->antenna
= rt2x00dev
->link
.ant
.active
.rx
;
561 ieee80211_rx_ni(rt2x00dev
->hw
, entry
->skb
);
564 * Replace the skb with the freshly allocated one.
569 rt2x00dev
->ops
->lib
->clear_entry(entry
);
570 rt2x00queue_index_inc(entry
->queue
, Q_INDEX
);
571 rt2x00queue_index_inc(entry
->queue
, Q_INDEX_DONE
);
573 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone
);
576 * Driver initialization handlers.
578 const struct rt2x00_rate rt2x00_supported_rates
[12] = {
580 .flags
= DEV_RATE_CCK
,
584 .mcs
= RATE_MCS(RATE_MODE_CCK
, 0),
587 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
,
591 .mcs
= RATE_MCS(RATE_MODE_CCK
, 1),
594 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
,
598 .mcs
= RATE_MCS(RATE_MODE_CCK
, 2),
601 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
,
605 .mcs
= RATE_MCS(RATE_MODE_CCK
, 3),
608 .flags
= DEV_RATE_OFDM
,
612 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 0),
615 .flags
= DEV_RATE_OFDM
,
619 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 1),
622 .flags
= DEV_RATE_OFDM
,
626 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 2),
629 .flags
= DEV_RATE_OFDM
,
633 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 3),
636 .flags
= DEV_RATE_OFDM
,
640 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 4),
643 .flags
= DEV_RATE_OFDM
,
647 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 5),
650 .flags
= DEV_RATE_OFDM
,
654 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 6),
657 .flags
= DEV_RATE_OFDM
,
661 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 7),
665 static void rt2x00lib_channel(struct ieee80211_channel
*entry
,
666 const int channel
, const int tx_power
,
669 entry
->center_freq
= ieee80211_channel_to_frequency(channel
);
670 entry
->hw_value
= value
;
671 entry
->max_power
= tx_power
;
672 entry
->max_antenna_gain
= 0xff;
675 static void rt2x00lib_rate(struct ieee80211_rate
*entry
,
676 const u16 index
, const struct rt2x00_rate
*rate
)
679 entry
->bitrate
= rate
->bitrate
;
680 entry
->hw_value
=index
;
681 entry
->hw_value_short
= index
;
683 if (rate
->flags
& DEV_RATE_SHORT_PREAMBLE
)
684 entry
->flags
|= IEEE80211_RATE_SHORT_PREAMBLE
;
687 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev
*rt2x00dev
,
688 struct hw_mode_spec
*spec
)
690 struct ieee80211_hw
*hw
= rt2x00dev
->hw
;
691 struct ieee80211_channel
*channels
;
692 struct ieee80211_rate
*rates
;
693 unsigned int num_rates
;
697 if (spec
->supported_rates
& SUPPORT_RATE_CCK
)
699 if (spec
->supported_rates
& SUPPORT_RATE_OFDM
)
702 channels
= kzalloc(sizeof(*channels
) * spec
->num_channels
, GFP_KERNEL
);
706 rates
= kzalloc(sizeof(*rates
) * num_rates
, GFP_KERNEL
);
708 goto exit_free_channels
;
711 * Initialize Rate list.
713 for (i
= 0; i
< num_rates
; i
++)
714 rt2x00lib_rate(&rates
[i
], i
, rt2x00_get_rate(i
));
717 * Initialize Channel list.
719 for (i
= 0; i
< spec
->num_channels
; i
++) {
720 rt2x00lib_channel(&channels
[i
],
721 spec
->channels
[i
].channel
,
722 spec
->channels_info
[i
].max_power
, i
);
726 * Intitialize 802.11b, 802.11g
730 if (spec
->supported_bands
& SUPPORT_BAND_2GHZ
) {
731 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].n_channels
= 14;
732 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].n_bitrates
= num_rates
;
733 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].channels
= channels
;
734 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].bitrates
= rates
;
735 hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
] =
736 &rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
];
737 memcpy(&rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].ht_cap
,
738 &spec
->ht
, sizeof(spec
->ht
));
742 * Intitialize 802.11a
744 * Channels: OFDM, UNII, HiperLAN2.
746 if (spec
->supported_bands
& SUPPORT_BAND_5GHZ
) {
747 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].n_channels
=
748 spec
->num_channels
- 14;
749 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].n_bitrates
=
751 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].channels
= &channels
[14];
752 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].bitrates
= &rates
[4];
753 hw
->wiphy
->bands
[IEEE80211_BAND_5GHZ
] =
754 &rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
];
755 memcpy(&rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].ht_cap
,
756 &spec
->ht
, sizeof(spec
->ht
));
763 ERROR(rt2x00dev
, "Allocation ieee80211 modes failed.\n");
767 static void rt2x00lib_remove_hw(struct rt2x00_dev
*rt2x00dev
)
769 if (test_bit(DEVICE_STATE_REGISTERED_HW
, &rt2x00dev
->flags
))
770 ieee80211_unregister_hw(rt2x00dev
->hw
);
772 if (likely(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
])) {
773 kfree(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
]->channels
);
774 kfree(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
]->bitrates
);
775 rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
] = NULL
;
776 rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_5GHZ
] = NULL
;
779 kfree(rt2x00dev
->spec
.channels_info
);
782 static int rt2x00lib_probe_hw(struct rt2x00_dev
*rt2x00dev
)
784 struct hw_mode_spec
*spec
= &rt2x00dev
->spec
;
787 if (test_bit(DEVICE_STATE_REGISTERED_HW
, &rt2x00dev
->flags
))
791 * Initialize HW modes.
793 status
= rt2x00lib_probe_hw_modes(rt2x00dev
, spec
);
798 * Initialize HW fields.
800 rt2x00dev
->hw
->queues
= rt2x00dev
->ops
->tx_queues
;
803 * Initialize extra TX headroom required.
805 rt2x00dev
->hw
->extra_tx_headroom
=
806 max_t(unsigned int, IEEE80211_TX_STATUS_HEADROOM
,
807 rt2x00dev
->ops
->extra_tx_headroom
);
810 * Take TX headroom required for alignment into account.
812 if (test_bit(DRIVER_REQUIRE_L2PAD
, &rt2x00dev
->flags
))
813 rt2x00dev
->hw
->extra_tx_headroom
+= RT2X00_L2PAD_SIZE
;
814 else if (test_bit(DRIVER_REQUIRE_DMA
, &rt2x00dev
->flags
))
815 rt2x00dev
->hw
->extra_tx_headroom
+= RT2X00_ALIGN_SIZE
;
818 * Allocate tx status FIFO for driver use.
820 if (test_bit(DRIVER_REQUIRE_TXSTATUS_FIFO
, &rt2x00dev
->flags
) &&
821 rt2x00dev
->ops
->lib
->txstatus_tasklet
) {
823 * Allocate txstatus fifo and tasklet, we use a size of 512
824 * for the kfifo which is big enough to store 512/4=128 tx
825 * status reports. In the worst case (tx status for all tx
826 * queues gets reported before we've got a chance to handle
827 * them) 24*4=384 tx status reports need to be cached.
829 status
= kfifo_alloc(&rt2x00dev
->txstatus_fifo
, 512,
834 /* tasklet for processing the tx status reports. */
835 tasklet_init(&rt2x00dev
->txstatus_tasklet
,
836 rt2x00dev
->ops
->lib
->txstatus_tasklet
,
837 (unsigned long)rt2x00dev
);
844 status
= ieee80211_register_hw(rt2x00dev
->hw
);
848 set_bit(DEVICE_STATE_REGISTERED_HW
, &rt2x00dev
->flags
);
854 * Initialization/uninitialization handlers.
856 static void rt2x00lib_uninitialize(struct rt2x00_dev
*rt2x00dev
)
858 if (!test_and_clear_bit(DEVICE_STATE_INITIALIZED
, &rt2x00dev
->flags
))
862 * Unregister extra components.
864 rt2x00rfkill_unregister(rt2x00dev
);
867 * Allow the HW to uninitialize.
869 rt2x00dev
->ops
->lib
->uninitialize(rt2x00dev
);
872 * Free allocated queue entries.
874 rt2x00queue_uninitialize(rt2x00dev
);
877 static int rt2x00lib_initialize(struct rt2x00_dev
*rt2x00dev
)
881 if (test_bit(DEVICE_STATE_INITIALIZED
, &rt2x00dev
->flags
))
885 * Allocate all queue entries.
887 status
= rt2x00queue_initialize(rt2x00dev
);
892 * Initialize the device.
894 status
= rt2x00dev
->ops
->lib
->initialize(rt2x00dev
);
896 rt2x00queue_uninitialize(rt2x00dev
);
900 set_bit(DEVICE_STATE_INITIALIZED
, &rt2x00dev
->flags
);
903 * Register the extra components.
905 rt2x00rfkill_register(rt2x00dev
);
910 int rt2x00lib_start(struct rt2x00_dev
*rt2x00dev
)
914 if (test_bit(DEVICE_STATE_STARTED
, &rt2x00dev
->flags
))
918 * If this is the first interface which is added,
919 * we should load the firmware now.
921 retval
= rt2x00lib_load_firmware(rt2x00dev
);
926 * Initialize the device.
928 retval
= rt2x00lib_initialize(rt2x00dev
);
932 rt2x00dev
->intf_ap_count
= 0;
933 rt2x00dev
->intf_sta_count
= 0;
934 rt2x00dev
->intf_associated
= 0;
936 /* Enable the radio */
937 retval
= rt2x00lib_enable_radio(rt2x00dev
);
941 set_bit(DEVICE_STATE_STARTED
, &rt2x00dev
->flags
);
946 void rt2x00lib_stop(struct rt2x00_dev
*rt2x00dev
)
948 if (!test_and_clear_bit(DEVICE_STATE_STARTED
, &rt2x00dev
->flags
))
952 * Perhaps we can add something smarter here,
953 * but for now just disabling the radio should do.
955 rt2x00lib_disable_radio(rt2x00dev
);
957 rt2x00dev
->intf_ap_count
= 0;
958 rt2x00dev
->intf_sta_count
= 0;
959 rt2x00dev
->intf_associated
= 0;
963 * driver allocation handlers.
965 int rt2x00lib_probe_dev(struct rt2x00_dev
*rt2x00dev
)
967 int retval
= -ENOMEM
;
969 mutex_init(&rt2x00dev
->csr_mutex
);
971 set_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
);
974 * Make room for rt2x00_intf inside the per-interface
975 * structure ieee80211_vif.
977 rt2x00dev
->hw
->vif_data_size
= sizeof(struct rt2x00_intf
);
980 * Determine which operating modes are supported, all modes
981 * which require beaconing, depend on the availability of
984 rt2x00dev
->hw
->wiphy
->interface_modes
= BIT(NL80211_IFTYPE_STATION
);
985 if (rt2x00dev
->ops
->bcn
->entry_num
> 0)
986 rt2x00dev
->hw
->wiphy
->interface_modes
|=
987 BIT(NL80211_IFTYPE_ADHOC
) |
988 BIT(NL80211_IFTYPE_AP
) |
989 BIT(NL80211_IFTYPE_MESH_POINT
) |
990 BIT(NL80211_IFTYPE_WDS
);
993 * Initialize configuration work.
995 INIT_WORK(&rt2x00dev
->intf_work
, rt2x00lib_intf_scheduled
);
998 * Let the driver probe the device to detect the capabilities.
1000 retval
= rt2x00dev
->ops
->lib
->probe_hw(rt2x00dev
);
1002 ERROR(rt2x00dev
, "Failed to allocate device.\n");
1007 * Allocate queue array.
1009 retval
= rt2x00queue_allocate(rt2x00dev
);
1014 * Initialize ieee80211 structure.
1016 retval
= rt2x00lib_probe_hw(rt2x00dev
);
1018 ERROR(rt2x00dev
, "Failed to initialize hw.\n");
1023 * Register extra components.
1025 rt2x00link_register(rt2x00dev
);
1026 rt2x00leds_register(rt2x00dev
);
1027 rt2x00debug_register(rt2x00dev
);
1032 rt2x00lib_remove_dev(rt2x00dev
);
1036 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev
);
1038 void rt2x00lib_remove_dev(struct rt2x00_dev
*rt2x00dev
)
1040 clear_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
);
1045 rt2x00lib_disable_radio(rt2x00dev
);
1050 cancel_work_sync(&rt2x00dev
->intf_work
);
1051 cancel_work_sync(&rt2x00dev
->rxdone_work
);
1052 cancel_work_sync(&rt2x00dev
->txdone_work
);
1055 * Free the tx status fifo.
1057 kfifo_free(&rt2x00dev
->txstatus_fifo
);
1060 * Kill the tx status tasklet.
1062 tasklet_kill(&rt2x00dev
->txstatus_tasklet
);
1065 * Uninitialize device.
1067 rt2x00lib_uninitialize(rt2x00dev
);
1070 * Free extra components
1072 rt2x00debug_deregister(rt2x00dev
);
1073 rt2x00leds_unregister(rt2x00dev
);
1076 * Free ieee80211_hw memory.
1078 rt2x00lib_remove_hw(rt2x00dev
);
1081 * Free firmware image.
1083 rt2x00lib_free_firmware(rt2x00dev
);
1086 * Free queue structures.
1088 rt2x00queue_free(rt2x00dev
);
1090 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev
);
1093 * Device state handlers
1096 int rt2x00lib_suspend(struct rt2x00_dev
*rt2x00dev
, pm_message_t state
)
1098 NOTICE(rt2x00dev
, "Going to sleep.\n");
1101 * Prevent mac80211 from accessing driver while suspended.
1103 if (!test_and_clear_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
))
1107 * Cleanup as much as possible.
1109 rt2x00lib_uninitialize(rt2x00dev
);
1112 * Suspend/disable extra components.
1114 rt2x00leds_suspend(rt2x00dev
);
1115 rt2x00debug_deregister(rt2x00dev
);
1118 * Set device mode to sleep for power management,
1119 * on some hardware this call seems to consistently fail.
1120 * From the specifications it is hard to tell why it fails,
1121 * and if this is a "bad thing".
1122 * Overall it is safe to just ignore the failure and
1123 * continue suspending. The only downside is that the
1124 * device will not be in optimal power save mode, but with
1125 * the radio and the other components already disabled the
1126 * device is as good as disabled.
1128 if (rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_SLEEP
))
1129 WARNING(rt2x00dev
, "Device failed to enter sleep state, "
1130 "continue suspending.\n");
1134 EXPORT_SYMBOL_GPL(rt2x00lib_suspend
);
1136 int rt2x00lib_resume(struct rt2x00_dev
*rt2x00dev
)
1138 NOTICE(rt2x00dev
, "Waking up.\n");
1141 * Restore/enable extra components.
1143 rt2x00debug_register(rt2x00dev
);
1144 rt2x00leds_resume(rt2x00dev
);
1147 * We are ready again to receive requests from mac80211.
1149 set_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
);
1153 EXPORT_SYMBOL_GPL(rt2x00lib_resume
);
1154 #endif /* CONFIG_PM */
1157 * rt2x00lib module information.
1159 MODULE_AUTHOR(DRV_PROJECT
);
1160 MODULE_VERSION(DRV_VERSION
);
1161 MODULE_DESCRIPTION("rt2x00 library");
1162 MODULE_LICENSE("GPL");