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>
30 #include <linux/log2.h>
33 #include "rt2x00lib.h"
38 u32
rt2x00lib_get_bssidx(struct rt2x00_dev
*rt2x00dev
,
39 struct ieee80211_vif
*vif
)
42 * When in STA mode, bssidx is always 0 otherwise local_address[5]
43 * contains the bss number, see BSS_ID_MASK comments for details.
45 if (rt2x00dev
->intf_sta_count
)
47 return vif
->addr
[5] & (rt2x00dev
->ops
->max_ap_intf
- 1);
49 EXPORT_SYMBOL_GPL(rt2x00lib_get_bssidx
);
52 * Radio control handlers.
54 int rt2x00lib_enable_radio(struct rt2x00_dev
*rt2x00dev
)
59 * Don't enable the radio twice.
60 * And check if the hardware button has been disabled.
62 if (test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
66 * Initialize all data queues.
68 rt2x00queue_init_queues(rt2x00dev
);
74 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_ON
);
78 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_IRQ_ON
);
80 rt2x00leds_led_radio(rt2x00dev
, true);
81 rt2x00led_led_activity(rt2x00dev
, true);
83 set_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
);
88 rt2x00queue_start_queues(rt2x00dev
);
89 rt2x00link_start_tuner(rt2x00dev
);
90 rt2x00link_start_agc(rt2x00dev
);
91 if (test_bit(CAPABILITY_VCO_RECALIBRATION
, &rt2x00dev
->cap_flags
))
92 rt2x00link_start_vcocal(rt2x00dev
);
95 * Start watchdog monitoring.
97 rt2x00link_start_watchdog(rt2x00dev
);
102 void rt2x00lib_disable_radio(struct rt2x00_dev
*rt2x00dev
)
104 if (!test_and_clear_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
108 * Stop watchdog monitoring.
110 rt2x00link_stop_watchdog(rt2x00dev
);
115 rt2x00link_stop_agc(rt2x00dev
);
116 if (test_bit(CAPABILITY_VCO_RECALIBRATION
, &rt2x00dev
->cap_flags
))
117 rt2x00link_stop_vcocal(rt2x00dev
);
118 rt2x00link_stop_tuner(rt2x00dev
);
119 rt2x00queue_stop_queues(rt2x00dev
);
120 rt2x00queue_flush_queues(rt2x00dev
, true);
125 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_OFF
);
126 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_IRQ_OFF
);
127 rt2x00led_led_activity(rt2x00dev
, false);
128 rt2x00leds_led_radio(rt2x00dev
, false);
131 static void rt2x00lib_intf_scheduled_iter(void *data
, u8
*mac
,
132 struct ieee80211_vif
*vif
)
134 struct rt2x00_dev
*rt2x00dev
= data
;
135 struct rt2x00_intf
*intf
= vif_to_intf(vif
);
138 * It is possible the radio was disabled while the work had been
139 * scheduled. If that happens we should return here immediately,
140 * note that in the spinlock protected area above the delayed_flags
141 * have been cleared correctly.
143 if (!test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
146 if (test_and_clear_bit(DELAYED_UPDATE_BEACON
, &intf
->delayed_flags
))
147 rt2x00queue_update_beacon(rt2x00dev
, vif
);
150 static void rt2x00lib_intf_scheduled(struct work_struct
*work
)
152 struct rt2x00_dev
*rt2x00dev
=
153 container_of(work
, struct rt2x00_dev
, intf_work
);
156 * Iterate over each interface and perform the
157 * requested configurations.
159 ieee80211_iterate_active_interfaces(rt2x00dev
->hw
,
160 rt2x00lib_intf_scheduled_iter
,
164 static void rt2x00lib_autowakeup(struct work_struct
*work
)
166 struct rt2x00_dev
*rt2x00dev
=
167 container_of(work
, struct rt2x00_dev
, autowakeup_work
.work
);
169 if (!test_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
))
172 if (rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_AWAKE
))
173 ERROR(rt2x00dev
, "Device failed to wakeup.\n");
174 clear_bit(CONFIG_POWERSAVING
, &rt2x00dev
->flags
);
178 * Interrupt context handlers.
180 static void rt2x00lib_bc_buffer_iter(void *data
, u8
*mac
,
181 struct ieee80211_vif
*vif
)
183 struct rt2x00_dev
*rt2x00dev
= data
;
187 * Only AP mode interfaces do broad- and multicast buffering
189 if (vif
->type
!= NL80211_IFTYPE_AP
)
193 * Send out buffered broad- and multicast frames
195 skb
= ieee80211_get_buffered_bc(rt2x00dev
->hw
, vif
);
197 rt2x00mac_tx(rt2x00dev
->hw
, skb
);
198 skb
= ieee80211_get_buffered_bc(rt2x00dev
->hw
, vif
);
202 static void rt2x00lib_beaconupdate_iter(void *data
, u8
*mac
,
203 struct ieee80211_vif
*vif
)
205 struct rt2x00_dev
*rt2x00dev
= data
;
207 if (vif
->type
!= NL80211_IFTYPE_AP
&&
208 vif
->type
!= NL80211_IFTYPE_ADHOC
&&
209 vif
->type
!= NL80211_IFTYPE_MESH_POINT
&&
210 vif
->type
!= NL80211_IFTYPE_WDS
)
214 * Update the beacon without locking. This is safe on PCI devices
215 * as they only update the beacon periodically here. This should
216 * never be called for USB devices.
218 WARN_ON(rt2x00_is_usb(rt2x00dev
));
219 rt2x00queue_update_beacon_locked(rt2x00dev
, vif
);
222 void rt2x00lib_beacondone(struct rt2x00_dev
*rt2x00dev
)
224 if (!test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
227 /* send buffered bc/mc frames out for every bssid */
228 ieee80211_iterate_active_interfaces_atomic(rt2x00dev
->hw
,
229 rt2x00lib_bc_buffer_iter
,
232 * Devices with pre tbtt interrupt don't need to update the beacon
233 * here as they will fetch the next beacon directly prior to
236 if (test_bit(CAPABILITY_PRE_TBTT_INTERRUPT
, &rt2x00dev
->cap_flags
))
239 /* fetch next beacon */
240 ieee80211_iterate_active_interfaces_atomic(rt2x00dev
->hw
,
241 rt2x00lib_beaconupdate_iter
,
244 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone
);
246 void rt2x00lib_pretbtt(struct rt2x00_dev
*rt2x00dev
)
248 if (!test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
251 /* fetch next beacon */
252 ieee80211_iterate_active_interfaces_atomic(rt2x00dev
->hw
,
253 rt2x00lib_beaconupdate_iter
,
256 EXPORT_SYMBOL_GPL(rt2x00lib_pretbtt
);
258 void rt2x00lib_dmastart(struct queue_entry
*entry
)
260 set_bit(ENTRY_OWNER_DEVICE_DATA
, &entry
->flags
);
261 rt2x00queue_index_inc(entry
, Q_INDEX
);
263 EXPORT_SYMBOL_GPL(rt2x00lib_dmastart
);
265 void rt2x00lib_dmadone(struct queue_entry
*entry
)
267 set_bit(ENTRY_DATA_STATUS_PENDING
, &entry
->flags
);
268 clear_bit(ENTRY_OWNER_DEVICE_DATA
, &entry
->flags
);
269 rt2x00queue_index_inc(entry
, Q_INDEX_DMA_DONE
);
271 EXPORT_SYMBOL_GPL(rt2x00lib_dmadone
);
273 void rt2x00lib_txdone(struct queue_entry
*entry
,
274 struct txdone_entry_desc
*txdesc
)
276 struct rt2x00_dev
*rt2x00dev
= entry
->queue
->rt2x00dev
;
277 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(entry
->skb
);
278 struct skb_frame_desc
*skbdesc
= get_skb_frame_desc(entry
->skb
);
279 unsigned int header_length
, i
;
280 u8 rate_idx
, rate_flags
, retry_rates
;
281 u8 skbdesc_flags
= skbdesc
->flags
;
287 rt2x00queue_unmap_skb(entry
);
290 * Remove the extra tx headroom from the skb.
292 skb_pull(entry
->skb
, rt2x00dev
->ops
->extra_tx_headroom
);
295 * Signal that the TX descriptor is no longer in the skb.
297 skbdesc
->flags
&= ~SKBDESC_DESC_IN_SKB
;
300 * Determine the length of 802.11 header.
302 header_length
= ieee80211_get_hdrlen_from_skb(entry
->skb
);
305 * Remove L2 padding which was added during
307 if (test_bit(REQUIRE_L2PAD
, &rt2x00dev
->cap_flags
))
308 rt2x00queue_remove_l2pad(entry
->skb
, header_length
);
311 * If the IV/EIV data was stripped from the frame before it was
312 * passed to the hardware, we should now reinsert it again because
313 * mac80211 will expect the same data to be present it the
314 * frame as it was passed to us.
316 if (test_bit(CAPABILITY_HW_CRYPTO
, &rt2x00dev
->cap_flags
))
317 rt2x00crypto_tx_insert_iv(entry
->skb
, header_length
);
320 * Send frame to debugfs immediately, after this call is completed
321 * we are going to overwrite the skb->cb array.
323 rt2x00debug_dump_frame(rt2x00dev
, DUMP_FRAME_TXDONE
, entry
->skb
);
326 * Determine if the frame has been successfully transmitted.
329 test_bit(TXDONE_SUCCESS
, &txdesc
->flags
) ||
330 test_bit(TXDONE_UNKNOWN
, &txdesc
->flags
);
333 * Update TX statistics.
335 rt2x00dev
->link
.qual
.tx_success
+= success
;
336 rt2x00dev
->link
.qual
.tx_failed
+= !success
;
338 rate_idx
= skbdesc
->tx_rate_idx
;
339 rate_flags
= skbdesc
->tx_rate_flags
;
340 retry_rates
= test_bit(TXDONE_FALLBACK
, &txdesc
->flags
) ?
341 (txdesc
->retry
+ 1) : 1;
344 * Initialize TX status
346 memset(&tx_info
->status
, 0, sizeof(tx_info
->status
));
347 tx_info
->status
.ack_signal
= 0;
350 * Frame was send with retries, hardware tried
351 * different rates to send out the frame, at each
352 * retry it lowered the rate 1 step except when the
353 * lowest rate was used.
355 for (i
= 0; i
< retry_rates
&& i
< IEEE80211_TX_MAX_RATES
; i
++) {
356 tx_info
->status
.rates
[i
].idx
= rate_idx
- i
;
357 tx_info
->status
.rates
[i
].flags
= rate_flags
;
359 if (rate_idx
- i
== 0) {
361 * The lowest rate (index 0) was used until the
362 * number of max retries was reached.
364 tx_info
->status
.rates
[i
].count
= retry_rates
- i
;
368 tx_info
->status
.rates
[i
].count
= 1;
370 if (i
< (IEEE80211_TX_MAX_RATES
- 1))
371 tx_info
->status
.rates
[i
].idx
= -1; /* terminate */
373 if (!(tx_info
->flags
& IEEE80211_TX_CTL_NO_ACK
)) {
375 tx_info
->flags
|= IEEE80211_TX_STAT_ACK
;
377 rt2x00dev
->low_level_stats
.dot11ACKFailureCount
++;
381 * Every single frame has it's own tx status, hence report
382 * every frame as ampdu of size 1.
384 * TODO: if we can find out how many frames were aggregated
385 * by the hw we could provide the real ampdu_len to mac80211
386 * which would allow the rc algorithm to better decide on
387 * which rates are suitable.
389 if (test_bit(TXDONE_AMPDU
, &txdesc
->flags
) ||
390 tx_info
->flags
& IEEE80211_TX_CTL_AMPDU
) {
391 tx_info
->flags
|= IEEE80211_TX_STAT_AMPDU
;
392 tx_info
->status
.ampdu_len
= 1;
393 tx_info
->status
.ampdu_ack_len
= success
? 1 : 0;
396 tx_info
->flags
|= IEEE80211_TX_STAT_AMPDU_NO_BACK
;
399 if (rate_flags
& IEEE80211_TX_RC_USE_RTS_CTS
) {
401 rt2x00dev
->low_level_stats
.dot11RTSSuccessCount
++;
403 rt2x00dev
->low_level_stats
.dot11RTSFailureCount
++;
407 * Only send the status report to mac80211 when it's a frame
408 * that originated in mac80211. If this was a extra frame coming
409 * through a mac80211 library call (RTS/CTS) then we should not
410 * send the status report back.
412 if (!(skbdesc_flags
& SKBDESC_NOT_MAC80211
)) {
413 if (test_bit(REQUIRE_TASKLET_CONTEXT
, &rt2x00dev
->cap_flags
))
414 ieee80211_tx_status(rt2x00dev
->hw
, entry
->skb
);
416 ieee80211_tx_status_ni(rt2x00dev
->hw
, entry
->skb
);
418 dev_kfree_skb_any(entry
->skb
);
421 * Make this entry available for reuse.
426 rt2x00dev
->ops
->lib
->clear_entry(entry
);
428 rt2x00queue_index_inc(entry
, Q_INDEX_DONE
);
431 * If the data queue was below the threshold before the txdone
432 * handler we must make sure the packet queue in the mac80211 stack
433 * is reenabled when the txdone handler has finished. This has to be
434 * serialized with rt2x00mac_tx(), otherwise we can wake up queue
435 * before it was stopped.
437 spin_lock_bh(&entry
->queue
->tx_lock
);
438 if (!rt2x00queue_threshold(entry
->queue
))
439 rt2x00queue_unpause_queue(entry
->queue
);
440 spin_unlock_bh(&entry
->queue
->tx_lock
);
442 EXPORT_SYMBOL_GPL(rt2x00lib_txdone
);
444 void rt2x00lib_txdone_noinfo(struct queue_entry
*entry
, u32 status
)
446 struct txdone_entry_desc txdesc
;
449 __set_bit(status
, &txdesc
.flags
);
452 rt2x00lib_txdone(entry
, &txdesc
);
454 EXPORT_SYMBOL_GPL(rt2x00lib_txdone_noinfo
);
456 static u8
*rt2x00lib_find_ie(u8
*data
, unsigned int len
, u8 ie
)
458 struct ieee80211_mgmt
*mgmt
= (void *)data
;
461 pos
= (u8
*)mgmt
->u
.beacon
.variable
;
464 if (pos
+ 2 + pos
[1] > end
)
476 static void rt2x00lib_sleep(struct work_struct
*work
)
478 struct rt2x00_dev
*rt2x00dev
=
479 container_of(work
, struct rt2x00_dev
, sleep_work
);
481 if (!test_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
))
485 * Check again is powersaving is enabled, to prevent races from delayed
488 if (!test_bit(CONFIG_POWERSAVING
, &rt2x00dev
->flags
))
489 rt2x00lib_config(rt2x00dev
, &rt2x00dev
->hw
->conf
,
490 IEEE80211_CONF_CHANGE_PS
);
493 static void rt2x00lib_rxdone_check_ps(struct rt2x00_dev
*rt2x00dev
,
495 struct rxdone_entry_desc
*rxdesc
)
497 struct ieee80211_hdr
*hdr
= (void *) skb
->data
;
498 struct ieee80211_tim_ie
*tim_ie
;
503 /* If this is not a beacon, or if mac80211 has no powersaving
504 * configured, or if the device is already in powersaving mode
505 * we can exit now. */
506 if (likely(!ieee80211_is_beacon(hdr
->frame_control
) ||
507 !(rt2x00dev
->hw
->conf
.flags
& IEEE80211_CONF_PS
)))
510 /* min. beacon length + FCS_LEN */
511 if (skb
->len
<= 40 + FCS_LEN
)
514 /* and only beacons from the associated BSSID, please */
515 if (!(rxdesc
->dev_flags
& RXDONE_MY_BSS
) ||
519 rt2x00dev
->last_beacon
= jiffies
;
521 tim
= rt2x00lib_find_ie(skb
->data
, skb
->len
- FCS_LEN
, WLAN_EID_TIM
);
525 if (tim
[1] < sizeof(*tim_ie
))
529 tim_ie
= (struct ieee80211_tim_ie
*) &tim
[2];
531 /* Check whenever the PHY can be turned off again. */
533 /* 1. What about buffered unicast traffic for our AID? */
534 cam
= ieee80211_check_tim(tim_ie
, tim_len
, rt2x00dev
->aid
);
536 /* 2. Maybe the AP wants to send multicast/broadcast data? */
537 cam
|= (tim_ie
->bitmap_ctrl
& 0x01);
539 if (!cam
&& !test_bit(CONFIG_POWERSAVING
, &rt2x00dev
->flags
))
540 queue_work(rt2x00dev
->workqueue
, &rt2x00dev
->sleep_work
);
543 static int rt2x00lib_rxdone_read_signal(struct rt2x00_dev
*rt2x00dev
,
544 struct rxdone_entry_desc
*rxdesc
)
546 struct ieee80211_supported_band
*sband
;
547 const struct rt2x00_rate
*rate
;
549 int signal
= rxdesc
->signal
;
550 int type
= (rxdesc
->dev_flags
& RXDONE_SIGNAL_MASK
);
552 switch (rxdesc
->rate_mode
) {
556 * For non-HT rates the MCS value needs to contain the
557 * actually used rate modulation (CCK or OFDM).
559 if (rxdesc
->dev_flags
& RXDONE_SIGNAL_MCS
)
560 signal
= RATE_MCS(rxdesc
->rate_mode
, signal
);
562 sband
= &rt2x00dev
->bands
[rt2x00dev
->curr_band
];
563 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
564 rate
= rt2x00_get_rate(sband
->bitrates
[i
].hw_value
);
565 if (((type
== RXDONE_SIGNAL_PLCP
) &&
566 (rate
->plcp
== signal
)) ||
567 ((type
== RXDONE_SIGNAL_BITRATE
) &&
568 (rate
->bitrate
== signal
)) ||
569 ((type
== RXDONE_SIGNAL_MCS
) &&
570 (rate
->mcs
== signal
))) {
575 case RATE_MODE_HT_MIX
:
576 case RATE_MODE_HT_GREENFIELD
:
577 if (signal
>= 0 && signal
<= 76)
584 WARNING(rt2x00dev
, "Frame received with unrecognized signal, "
585 "mode=0x%.4x, signal=0x%.4x, type=%d.\n",
586 rxdesc
->rate_mode
, signal
, type
);
590 void rt2x00lib_rxdone(struct queue_entry
*entry
)
592 struct rt2x00_dev
*rt2x00dev
= entry
->queue
->rt2x00dev
;
593 struct rxdone_entry_desc rxdesc
;
595 struct ieee80211_rx_status
*rx_status
;
596 unsigned int header_length
;
599 if (!test_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
) ||
600 !test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
603 if (test_bit(ENTRY_DATA_IO_FAILED
, &entry
->flags
))
607 * Allocate a new sk_buffer. If no new buffer available, drop the
608 * received frame and reuse the existing buffer.
610 skb
= rt2x00queue_alloc_rxskb(entry
);
617 rt2x00queue_unmap_skb(entry
);
620 * Extract the RXD details.
622 memset(&rxdesc
, 0, sizeof(rxdesc
));
623 rt2x00dev
->ops
->lib
->fill_rxdone(entry
, &rxdesc
);
626 * Check for valid size in case we get corrupted descriptor from
629 if (unlikely(rxdesc
.size
== 0 ||
630 rxdesc
.size
> entry
->queue
->data_size
)) {
631 WARNING(rt2x00dev
, "Wrong frame size %d max %d.\n",
632 rxdesc
.size
, entry
->queue
->data_size
);
633 dev_kfree_skb(entry
->skb
);
638 * The data behind the ieee80211 header must be
639 * aligned on a 4 byte boundary.
641 header_length
= ieee80211_get_hdrlen_from_skb(entry
->skb
);
644 * Hardware might have stripped the IV/EIV/ICV data,
645 * in that case it is possible that the data was
646 * provided separately (through hardware descriptor)
647 * in which case we should reinsert the data into the frame.
649 if ((rxdesc
.dev_flags
& RXDONE_CRYPTO_IV
) &&
650 (rxdesc
.flags
& RX_FLAG_IV_STRIPPED
))
651 rt2x00crypto_rx_insert_iv(entry
->skb
, header_length
,
653 else if (header_length
&&
654 (rxdesc
.size
> header_length
) &&
655 (rxdesc
.dev_flags
& RXDONE_L2PAD
))
656 rt2x00queue_remove_l2pad(entry
->skb
, header_length
);
658 /* Trim buffer to correct size */
659 skb_trim(entry
->skb
, rxdesc
.size
);
662 * Translate the signal to the correct bitrate index.
664 rate_idx
= rt2x00lib_rxdone_read_signal(rt2x00dev
, &rxdesc
);
665 if (rxdesc
.rate_mode
== RATE_MODE_HT_MIX
||
666 rxdesc
.rate_mode
== RATE_MODE_HT_GREENFIELD
)
667 rxdesc
.flags
|= RX_FLAG_HT
;
670 * Check if this is a beacon, and more frames have been
671 * buffered while we were in powersaving mode.
673 rt2x00lib_rxdone_check_ps(rt2x00dev
, entry
->skb
, &rxdesc
);
676 * Update extra components
678 rt2x00link_update_stats(rt2x00dev
, entry
->skb
, &rxdesc
);
679 rt2x00debug_update_crypto(rt2x00dev
, &rxdesc
);
680 rt2x00debug_dump_frame(rt2x00dev
, DUMP_FRAME_RXDONE
, entry
->skb
);
683 * Initialize RX status information, and send frame
686 rx_status
= IEEE80211_SKB_RXCB(entry
->skb
);
687 rx_status
->mactime
= rxdesc
.timestamp
;
688 rx_status
->band
= rt2x00dev
->curr_band
;
689 rx_status
->freq
= rt2x00dev
->curr_freq
;
690 rx_status
->rate_idx
= rate_idx
;
691 rx_status
->signal
= rxdesc
.rssi
;
692 rx_status
->flag
= rxdesc
.flags
;
693 rx_status
->antenna
= rt2x00dev
->link
.ant
.active
.rx
;
695 ieee80211_rx_ni(rt2x00dev
->hw
, entry
->skb
);
699 * Replace the skb with the freshly allocated one.
705 rt2x00queue_index_inc(entry
, Q_INDEX_DONE
);
706 if (test_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
) &&
707 test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
708 rt2x00dev
->ops
->lib
->clear_entry(entry
);
710 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone
);
713 * Driver initialization handlers.
715 const struct rt2x00_rate rt2x00_supported_rates
[12] = {
717 .flags
= DEV_RATE_CCK
,
721 .mcs
= RATE_MCS(RATE_MODE_CCK
, 0),
724 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
,
728 .mcs
= RATE_MCS(RATE_MODE_CCK
, 1),
731 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
,
735 .mcs
= RATE_MCS(RATE_MODE_CCK
, 2),
738 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
,
742 .mcs
= RATE_MCS(RATE_MODE_CCK
, 3),
745 .flags
= DEV_RATE_OFDM
,
749 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 0),
752 .flags
= DEV_RATE_OFDM
,
756 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 1),
759 .flags
= DEV_RATE_OFDM
,
763 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 2),
766 .flags
= DEV_RATE_OFDM
,
770 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 3),
773 .flags
= DEV_RATE_OFDM
,
777 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 4),
780 .flags
= DEV_RATE_OFDM
,
784 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 5),
787 .flags
= DEV_RATE_OFDM
,
791 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 6),
794 .flags
= DEV_RATE_OFDM
,
798 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 7),
802 static void rt2x00lib_channel(struct ieee80211_channel
*entry
,
803 const int channel
, const int tx_power
,
806 /* XXX: this assumption about the band is wrong for 802.11j */
807 entry
->band
= channel
<= 14 ? IEEE80211_BAND_2GHZ
: IEEE80211_BAND_5GHZ
;
808 entry
->center_freq
= ieee80211_channel_to_frequency(channel
,
810 entry
->hw_value
= value
;
811 entry
->max_power
= tx_power
;
812 entry
->max_antenna_gain
= 0xff;
815 static void rt2x00lib_rate(struct ieee80211_rate
*entry
,
816 const u16 index
, const struct rt2x00_rate
*rate
)
819 entry
->bitrate
= rate
->bitrate
;
820 entry
->hw_value
= index
;
821 entry
->hw_value_short
= index
;
823 if (rate
->flags
& DEV_RATE_SHORT_PREAMBLE
)
824 entry
->flags
|= IEEE80211_RATE_SHORT_PREAMBLE
;
827 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev
*rt2x00dev
,
828 struct hw_mode_spec
*spec
)
830 struct ieee80211_hw
*hw
= rt2x00dev
->hw
;
831 struct ieee80211_channel
*channels
;
832 struct ieee80211_rate
*rates
;
833 unsigned int num_rates
;
837 if (spec
->supported_rates
& SUPPORT_RATE_CCK
)
839 if (spec
->supported_rates
& SUPPORT_RATE_OFDM
)
842 channels
= kcalloc(spec
->num_channels
, sizeof(*channels
), GFP_KERNEL
);
846 rates
= kcalloc(num_rates
, sizeof(*rates
), GFP_KERNEL
);
848 goto exit_free_channels
;
851 * Initialize Rate list.
853 for (i
= 0; i
< num_rates
; i
++)
854 rt2x00lib_rate(&rates
[i
], i
, rt2x00_get_rate(i
));
857 * Initialize Channel list.
859 for (i
= 0; i
< spec
->num_channels
; i
++) {
860 rt2x00lib_channel(&channels
[i
],
861 spec
->channels
[i
].channel
,
862 spec
->channels_info
[i
].max_power
, i
);
866 * Intitialize 802.11b, 802.11g
870 if (spec
->supported_bands
& SUPPORT_BAND_2GHZ
) {
871 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].n_channels
= 14;
872 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].n_bitrates
= num_rates
;
873 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].channels
= channels
;
874 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].bitrates
= rates
;
875 hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
] =
876 &rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
];
877 memcpy(&rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].ht_cap
,
878 &spec
->ht
, sizeof(spec
->ht
));
882 * Intitialize 802.11a
884 * Channels: OFDM, UNII, HiperLAN2.
886 if (spec
->supported_bands
& SUPPORT_BAND_5GHZ
) {
887 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].n_channels
=
888 spec
->num_channels
- 14;
889 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].n_bitrates
=
891 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].channels
= &channels
[14];
892 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].bitrates
= &rates
[4];
893 hw
->wiphy
->bands
[IEEE80211_BAND_5GHZ
] =
894 &rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
];
895 memcpy(&rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].ht_cap
,
896 &spec
->ht
, sizeof(spec
->ht
));
903 ERROR(rt2x00dev
, "Allocation ieee80211 modes failed.\n");
907 static void rt2x00lib_remove_hw(struct rt2x00_dev
*rt2x00dev
)
909 if (test_bit(DEVICE_STATE_REGISTERED_HW
, &rt2x00dev
->flags
))
910 ieee80211_unregister_hw(rt2x00dev
->hw
);
912 if (likely(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
])) {
913 kfree(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
]->channels
);
914 kfree(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
]->bitrates
);
915 rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
] = NULL
;
916 rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_5GHZ
] = NULL
;
919 kfree(rt2x00dev
->spec
.channels_info
);
922 static int rt2x00lib_probe_hw(struct rt2x00_dev
*rt2x00dev
)
924 struct hw_mode_spec
*spec
= &rt2x00dev
->spec
;
927 if (test_bit(DEVICE_STATE_REGISTERED_HW
, &rt2x00dev
->flags
))
931 * Initialize HW modes.
933 status
= rt2x00lib_probe_hw_modes(rt2x00dev
, spec
);
938 * Initialize HW fields.
940 rt2x00dev
->hw
->queues
= rt2x00dev
->ops
->tx_queues
;
943 * Initialize extra TX headroom required.
945 rt2x00dev
->hw
->extra_tx_headroom
=
946 max_t(unsigned int, IEEE80211_TX_STATUS_HEADROOM
,
947 rt2x00dev
->ops
->extra_tx_headroom
);
950 * Take TX headroom required for alignment into account.
952 if (test_bit(REQUIRE_L2PAD
, &rt2x00dev
->cap_flags
))
953 rt2x00dev
->hw
->extra_tx_headroom
+= RT2X00_L2PAD_SIZE
;
954 else if (test_bit(REQUIRE_DMA
, &rt2x00dev
->cap_flags
))
955 rt2x00dev
->hw
->extra_tx_headroom
+= RT2X00_ALIGN_SIZE
;
958 * Tell mac80211 about the size of our private STA structure.
960 rt2x00dev
->hw
->sta_data_size
= sizeof(struct rt2x00_sta
);
963 * Allocate tx status FIFO for driver use.
965 if (test_bit(REQUIRE_TXSTATUS_FIFO
, &rt2x00dev
->cap_flags
)) {
967 * Allocate the txstatus fifo. In the worst case the tx
968 * status fifo has to hold the tx status of all entries
969 * in all tx queues. Hence, calculate the kfifo size as
970 * tx_queues * entry_num and round up to the nearest
974 roundup_pow_of_two(rt2x00dev
->ops
->tx_queues
*
975 rt2x00dev
->ops
->tx
->entry_num
*
978 status
= kfifo_alloc(&rt2x00dev
->txstatus_fifo
, kfifo_size
,
985 * Initialize tasklets if used by the driver. Tasklets are
986 * disabled until the interrupts are turned on. The driver
987 * has to handle that.
989 #define RT2X00_TASKLET_INIT(taskletname) \
990 if (rt2x00dev->ops->lib->taskletname) { \
991 tasklet_init(&rt2x00dev->taskletname, \
992 rt2x00dev->ops->lib->taskletname, \
993 (unsigned long)rt2x00dev); \
996 RT2X00_TASKLET_INIT(txstatus_tasklet
);
997 RT2X00_TASKLET_INIT(pretbtt_tasklet
);
998 RT2X00_TASKLET_INIT(tbtt_tasklet
);
999 RT2X00_TASKLET_INIT(rxdone_tasklet
);
1000 RT2X00_TASKLET_INIT(autowake_tasklet
);
1002 #undef RT2X00_TASKLET_INIT
1007 status
= ieee80211_register_hw(rt2x00dev
->hw
);
1011 set_bit(DEVICE_STATE_REGISTERED_HW
, &rt2x00dev
->flags
);
1017 * Initialization/uninitialization handlers.
1019 static void rt2x00lib_uninitialize(struct rt2x00_dev
*rt2x00dev
)
1021 if (!test_and_clear_bit(DEVICE_STATE_INITIALIZED
, &rt2x00dev
->flags
))
1025 * Unregister extra components.
1027 rt2x00rfkill_unregister(rt2x00dev
);
1030 * Allow the HW to uninitialize.
1032 rt2x00dev
->ops
->lib
->uninitialize(rt2x00dev
);
1035 * Free allocated queue entries.
1037 rt2x00queue_uninitialize(rt2x00dev
);
1040 static int rt2x00lib_initialize(struct rt2x00_dev
*rt2x00dev
)
1044 if (test_bit(DEVICE_STATE_INITIALIZED
, &rt2x00dev
->flags
))
1048 * Allocate all queue entries.
1050 status
= rt2x00queue_initialize(rt2x00dev
);
1055 * Initialize the device.
1057 status
= rt2x00dev
->ops
->lib
->initialize(rt2x00dev
);
1059 rt2x00queue_uninitialize(rt2x00dev
);
1063 set_bit(DEVICE_STATE_INITIALIZED
, &rt2x00dev
->flags
);
1068 int rt2x00lib_start(struct rt2x00_dev
*rt2x00dev
)
1072 if (test_bit(DEVICE_STATE_STARTED
, &rt2x00dev
->flags
))
1076 * If this is the first interface which is added,
1077 * we should load the firmware now.
1079 retval
= rt2x00lib_load_firmware(rt2x00dev
);
1084 * Initialize the device.
1086 retval
= rt2x00lib_initialize(rt2x00dev
);
1090 rt2x00dev
->intf_ap_count
= 0;
1091 rt2x00dev
->intf_sta_count
= 0;
1092 rt2x00dev
->intf_associated
= 0;
1094 /* Enable the radio */
1095 retval
= rt2x00lib_enable_radio(rt2x00dev
);
1099 set_bit(DEVICE_STATE_STARTED
, &rt2x00dev
->flags
);
1104 void rt2x00lib_stop(struct rt2x00_dev
*rt2x00dev
)
1106 if (!test_and_clear_bit(DEVICE_STATE_STARTED
, &rt2x00dev
->flags
))
1110 * Perhaps we can add something smarter here,
1111 * but for now just disabling the radio should do.
1113 rt2x00lib_disable_radio(rt2x00dev
);
1115 rt2x00dev
->intf_ap_count
= 0;
1116 rt2x00dev
->intf_sta_count
= 0;
1117 rt2x00dev
->intf_associated
= 0;
1121 * driver allocation handlers.
1123 int rt2x00lib_probe_dev(struct rt2x00_dev
*rt2x00dev
)
1125 int retval
= -ENOMEM
;
1128 * Allocate the driver data memory, if necessary.
1130 if (rt2x00dev
->ops
->drv_data_size
> 0) {
1131 rt2x00dev
->drv_data
= kzalloc(rt2x00dev
->ops
->drv_data_size
,
1133 if (!rt2x00dev
->drv_data
) {
1139 spin_lock_init(&rt2x00dev
->irqmask_lock
);
1140 mutex_init(&rt2x00dev
->csr_mutex
);
1142 set_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
);
1145 * Make room for rt2x00_intf inside the per-interface
1146 * structure ieee80211_vif.
1148 rt2x00dev
->hw
->vif_data_size
= sizeof(struct rt2x00_intf
);
1151 * Determine which operating modes are supported, all modes
1152 * which require beaconing, depend on the availability of
1155 rt2x00dev
->hw
->wiphy
->interface_modes
= BIT(NL80211_IFTYPE_STATION
);
1156 if (rt2x00dev
->ops
->bcn
->entry_num
> 0)
1157 rt2x00dev
->hw
->wiphy
->interface_modes
|=
1158 BIT(NL80211_IFTYPE_ADHOC
) |
1159 BIT(NL80211_IFTYPE_AP
) |
1160 BIT(NL80211_IFTYPE_MESH_POINT
) |
1161 BIT(NL80211_IFTYPE_WDS
);
1166 rt2x00dev
->workqueue
=
1167 alloc_ordered_workqueue(wiphy_name(rt2x00dev
->hw
->wiphy
), 0);
1168 if (!rt2x00dev
->workqueue
) {
1173 INIT_WORK(&rt2x00dev
->intf_work
, rt2x00lib_intf_scheduled
);
1174 INIT_DELAYED_WORK(&rt2x00dev
->autowakeup_work
, rt2x00lib_autowakeup
);
1175 INIT_WORK(&rt2x00dev
->sleep_work
, rt2x00lib_sleep
);
1178 * Let the driver probe the device to detect the capabilities.
1180 retval
= rt2x00dev
->ops
->lib
->probe_hw(rt2x00dev
);
1182 ERROR(rt2x00dev
, "Failed to allocate device.\n");
1187 * Allocate queue array.
1189 retval
= rt2x00queue_allocate(rt2x00dev
);
1194 * Initialize ieee80211 structure.
1196 retval
= rt2x00lib_probe_hw(rt2x00dev
);
1198 ERROR(rt2x00dev
, "Failed to initialize hw.\n");
1203 * Register extra components.
1205 rt2x00link_register(rt2x00dev
);
1206 rt2x00leds_register(rt2x00dev
);
1207 rt2x00debug_register(rt2x00dev
);
1208 rt2x00rfkill_register(rt2x00dev
);
1213 rt2x00lib_remove_dev(rt2x00dev
);
1217 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev
);
1219 void rt2x00lib_remove_dev(struct rt2x00_dev
*rt2x00dev
)
1221 clear_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
);
1226 rt2x00lib_disable_radio(rt2x00dev
);
1231 cancel_work_sync(&rt2x00dev
->intf_work
);
1232 cancel_delayed_work_sync(&rt2x00dev
->autowakeup_work
);
1233 cancel_work_sync(&rt2x00dev
->sleep_work
);
1234 if (rt2x00_is_usb(rt2x00dev
)) {
1235 hrtimer_cancel(&rt2x00dev
->txstatus_timer
);
1236 cancel_work_sync(&rt2x00dev
->rxdone_work
);
1237 cancel_work_sync(&rt2x00dev
->txdone_work
);
1239 if (rt2x00dev
->workqueue
)
1240 destroy_workqueue(rt2x00dev
->workqueue
);
1243 * Free the tx status fifo.
1245 kfifo_free(&rt2x00dev
->txstatus_fifo
);
1248 * Kill the tx status tasklet.
1250 tasklet_kill(&rt2x00dev
->txstatus_tasklet
);
1251 tasklet_kill(&rt2x00dev
->pretbtt_tasklet
);
1252 tasklet_kill(&rt2x00dev
->tbtt_tasklet
);
1253 tasklet_kill(&rt2x00dev
->rxdone_tasklet
);
1254 tasklet_kill(&rt2x00dev
->autowake_tasklet
);
1257 * Uninitialize device.
1259 rt2x00lib_uninitialize(rt2x00dev
);
1262 * Free extra components
1264 rt2x00debug_deregister(rt2x00dev
);
1265 rt2x00leds_unregister(rt2x00dev
);
1268 * Free ieee80211_hw memory.
1270 rt2x00lib_remove_hw(rt2x00dev
);
1273 * Free firmware image.
1275 rt2x00lib_free_firmware(rt2x00dev
);
1278 * Free queue structures.
1280 rt2x00queue_free(rt2x00dev
);
1283 * Free the driver data.
1285 if (rt2x00dev
->drv_data
)
1286 kfree(rt2x00dev
->drv_data
);
1288 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev
);
1291 * Device state handlers
1294 int rt2x00lib_suspend(struct rt2x00_dev
*rt2x00dev
, pm_message_t state
)
1296 NOTICE(rt2x00dev
, "Going to sleep.\n");
1299 * Prevent mac80211 from accessing driver while suspended.
1301 if (!test_and_clear_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
))
1305 * Cleanup as much as possible.
1307 rt2x00lib_uninitialize(rt2x00dev
);
1310 * Suspend/disable extra components.
1312 rt2x00leds_suspend(rt2x00dev
);
1313 rt2x00debug_deregister(rt2x00dev
);
1316 * Set device mode to sleep for power management,
1317 * on some hardware this call seems to consistently fail.
1318 * From the specifications it is hard to tell why it fails,
1319 * and if this is a "bad thing".
1320 * Overall it is safe to just ignore the failure and
1321 * continue suspending. The only downside is that the
1322 * device will not be in optimal power save mode, but with
1323 * the radio and the other components already disabled the
1324 * device is as good as disabled.
1326 if (rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_SLEEP
))
1327 WARNING(rt2x00dev
, "Device failed to enter sleep state, "
1328 "continue suspending.\n");
1332 EXPORT_SYMBOL_GPL(rt2x00lib_suspend
);
1334 int rt2x00lib_resume(struct rt2x00_dev
*rt2x00dev
)
1336 NOTICE(rt2x00dev
, "Waking up.\n");
1339 * Restore/enable extra components.
1341 rt2x00debug_register(rt2x00dev
);
1342 rt2x00leds_resume(rt2x00dev
);
1345 * We are ready again to receive requests from mac80211.
1347 set_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
);
1351 EXPORT_SYMBOL_GPL(rt2x00lib_resume
);
1352 #endif /* CONFIG_PM */
1355 * rt2x00lib module information.
1357 MODULE_AUTHOR(DRV_PROJECT
);
1358 MODULE_VERSION(DRV_VERSION
);
1359 MODULE_DESCRIPTION("rt2x00 library");
1360 MODULE_LICENSE("GPL");