2 Copyright (C) 2004 - 2009 rt2x00 SourceForge Project
3 <http://rt2x00.serialmonkey.com>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the
17 Free Software Foundation, Inc.,
18 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 Abstract: rt2x00 generic device routines.
26 #include <linux/kernel.h>
27 #include <linux/module.h>
30 #include "rt2x00lib.h"
33 * Radio control handlers.
35 int rt2x00lib_enable_radio(struct rt2x00_dev
*rt2x00dev
)
40 * Don't enable the radio twice.
41 * And check if the hardware button has been disabled.
43 if (test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
) ||
44 test_bit(DEVICE_STATE_DISABLED_RADIO_HW
, &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 the TX queues.
75 ieee80211_wake_queues(rt2x00dev
->hw
);
80 void rt2x00lib_disable_radio(struct rt2x00_dev
*rt2x00dev
)
82 if (!test_and_clear_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
86 * Stop the TX queues in mac80211.
88 ieee80211_stop_queues(rt2x00dev
->hw
);
89 rt2x00queue_stop_queues(rt2x00dev
);
94 rt2x00lib_toggle_rx(rt2x00dev
, STATE_RADIO_RX_OFF
);
99 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_OFF
);
100 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_RADIO_IRQ_OFF
);
101 rt2x00led_led_activity(rt2x00dev
, false);
102 rt2x00leds_led_radio(rt2x00dev
, false);
105 void rt2x00lib_toggle_rx(struct rt2x00_dev
*rt2x00dev
, enum dev_state state
)
108 * When we are disabling the RX, we should also stop the link tuner.
110 if (state
== STATE_RADIO_RX_OFF
)
111 rt2x00link_stop_tuner(rt2x00dev
);
113 rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, state
);
116 * When we are enabling the RX, we should also start the link tuner.
118 if (state
== STATE_RADIO_RX_ON
)
119 rt2x00link_start_tuner(rt2x00dev
);
122 static void rt2x00lib_packetfilter_scheduled(struct work_struct
*work
)
124 struct rt2x00_dev
*rt2x00dev
=
125 container_of(work
, struct rt2x00_dev
, filter_work
);
127 rt2x00dev
->ops
->lib
->config_filter(rt2x00dev
, rt2x00dev
->packet_filter
);
130 static void rt2x00lib_intf_scheduled_iter(void *data
, u8
*mac
,
131 struct ieee80211_vif
*vif
)
133 struct rt2x00_dev
*rt2x00dev
= data
;
134 struct rt2x00_intf
*intf
= vif_to_intf(vif
);
135 struct ieee80211_bss_conf conf
;
139 * Copy all data we need during this action under the protection
140 * of a spinlock. Otherwise race conditions might occur which results
141 * into an invalid configuration.
143 spin_lock(&intf
->lock
);
145 memcpy(&conf
, &vif
->bss_conf
, sizeof(conf
));
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);
163 if (delayed_flags
& DELAYED_CONFIG_ERP
)
164 rt2x00lib_config_erp(rt2x00dev
, intf
, &conf
);
166 if (delayed_flags
& DELAYED_LED_ASSOC
)
167 rt2x00leds_led_assoc(rt2x00dev
, !!rt2x00dev
->intf_associated
);
170 static void rt2x00lib_intf_scheduled(struct work_struct
*work
)
172 struct rt2x00_dev
*rt2x00dev
=
173 container_of(work
, struct rt2x00_dev
, intf_work
);
176 * Iterate over each interface and perform the
177 * requested configurations.
179 ieee80211_iterate_active_interfaces(rt2x00dev
->hw
,
180 rt2x00lib_intf_scheduled_iter
,
185 * Interrupt context handlers.
187 static void rt2x00lib_beacondone_iter(void *data
, u8
*mac
,
188 struct ieee80211_vif
*vif
)
190 struct rt2x00_dev
*rt2x00dev
= data
;
191 struct rt2x00_intf
*intf
= vif_to_intf(vif
);
193 if (vif
->type
!= NL80211_IFTYPE_AP
&&
194 vif
->type
!= NL80211_IFTYPE_ADHOC
&&
195 vif
->type
!= NL80211_IFTYPE_MESH_POINT
&&
196 vif
->type
!= NL80211_IFTYPE_WDS
)
200 * Clean up the beacon skb.
202 rt2x00queue_free_skb(rt2x00dev
, intf
->beacon
->skb
);
203 intf
->beacon
->skb
= NULL
;
205 spin_lock(&intf
->lock
);
206 intf
->delayed_flags
|= DELAYED_UPDATE_BEACON
;
207 spin_unlock(&intf
->lock
);
210 void rt2x00lib_beacondone(struct rt2x00_dev
*rt2x00dev
)
212 if (!test_bit(DEVICE_STATE_ENABLED_RADIO
, &rt2x00dev
->flags
))
215 ieee80211_iterate_active_interfaces_atomic(rt2x00dev
->hw
,
216 rt2x00lib_beacondone_iter
,
219 queue_work(rt2x00dev
->hw
->workqueue
, &rt2x00dev
->intf_work
);
221 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone
);
223 void rt2x00lib_txdone(struct queue_entry
*entry
,
224 struct txdone_entry_desc
*txdesc
)
226 struct rt2x00_dev
*rt2x00dev
= entry
->queue
->rt2x00dev
;
227 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(entry
->skb
);
228 struct skb_frame_desc
*skbdesc
= get_skb_frame_desc(entry
->skb
);
229 enum data_queue_qid qid
= skb_get_queue_mapping(entry
->skb
);
230 unsigned int header_length
= ieee80211_get_hdrlen_from_skb(entry
->skb
);
231 u8 rate_idx
, rate_flags
;
236 rt2x00queue_unmap_skb(rt2x00dev
, entry
->skb
);
239 * Remove L2 padding which was added during
241 if (test_bit(DRIVER_REQUIRE_L2PAD
, &rt2x00dev
->flags
))
242 rt2x00queue_payload_align(entry
->skb
, true, header_length
);
245 * If the IV/EIV data was stripped from the frame before it was
246 * passed to the hardware, we should now reinsert it again because
247 * mac80211 will expect the the same data to be present it the
248 * frame as it was passed to us.
250 if (test_bit(CONFIG_SUPPORT_HW_CRYPTO
, &rt2x00dev
->flags
))
251 rt2x00crypto_tx_insert_iv(entry
->skb
, header_length
);
254 * Send frame to debugfs immediately, after this call is completed
255 * we are going to overwrite the skb->cb array.
257 rt2x00debug_dump_frame(rt2x00dev
, DUMP_FRAME_TXDONE
, entry
->skb
);
260 * Update TX statistics.
262 rt2x00dev
->link
.qual
.tx_success
+=
263 test_bit(TXDONE_SUCCESS
, &txdesc
->flags
);
264 rt2x00dev
->link
.qual
.tx_failed
+=
265 test_bit(TXDONE_FAILURE
, &txdesc
->flags
);
267 rate_idx
= skbdesc
->tx_rate_idx
;
268 rate_flags
= skbdesc
->tx_rate_flags
;
271 * Initialize TX status
273 memset(&tx_info
->status
, 0, sizeof(tx_info
->status
));
274 tx_info
->status
.ack_signal
= 0;
275 tx_info
->status
.rates
[0].idx
= rate_idx
;
276 tx_info
->status
.rates
[0].flags
= rate_flags
;
277 tx_info
->status
.rates
[0].count
= txdesc
->retry
+ 1;
278 tx_info
->status
.rates
[1].idx
= -1; /* terminate */
280 if (!(tx_info
->flags
& IEEE80211_TX_CTL_NO_ACK
)) {
281 if (test_bit(TXDONE_SUCCESS
, &txdesc
->flags
))
282 tx_info
->flags
|= IEEE80211_TX_STAT_ACK
;
283 else if (test_bit(TXDONE_FAILURE
, &txdesc
->flags
))
284 rt2x00dev
->low_level_stats
.dot11ACKFailureCount
++;
287 if (rate_flags
& IEEE80211_TX_RC_USE_RTS_CTS
) {
288 if (test_bit(TXDONE_SUCCESS
, &txdesc
->flags
))
289 rt2x00dev
->low_level_stats
.dot11RTSSuccessCount
++;
290 else if (test_bit(TXDONE_FAILURE
, &txdesc
->flags
))
291 rt2x00dev
->low_level_stats
.dot11RTSFailureCount
++;
295 * Only send the status report to mac80211 when TX status was
296 * requested by it. If this was a extra frame coming through
297 * a mac80211 library call (RTS/CTS) then we should not send the
298 * status report back.
300 if (tx_info
->flags
& IEEE80211_TX_CTL_REQ_TX_STATUS
)
301 ieee80211_tx_status_irqsafe(rt2x00dev
->hw
, entry
->skb
);
303 dev_kfree_skb_irq(entry
->skb
);
306 * Make this entry available for reuse.
311 rt2x00dev
->ops
->lib
->clear_entry(entry
);
313 clear_bit(ENTRY_OWNER_DEVICE_DATA
, &entry
->flags
);
314 rt2x00queue_index_inc(entry
->queue
, Q_INDEX_DONE
);
317 * If the data queue was below the threshold before the txdone
318 * handler we must make sure the packet queue in the mac80211 stack
319 * is reenabled when the txdone handler has finished.
321 if (!rt2x00queue_threshold(entry
->queue
))
322 ieee80211_wake_queue(rt2x00dev
->hw
, qid
);
324 EXPORT_SYMBOL_GPL(rt2x00lib_txdone
);
326 static int rt2x00lib_rxdone_read_signal(struct rt2x00_dev
*rt2x00dev
,
327 struct rxdone_entry_desc
*rxdesc
)
329 struct ieee80211_supported_band
*sband
;
330 const struct rt2x00_rate
*rate
;
336 * For non-HT rates the MCS value needs to contain the
337 * actually used rate modulation (CCK or OFDM).
339 if (rxdesc
->dev_flags
& RXDONE_SIGNAL_MCS
)
340 signal
= RATE_MCS(rxdesc
->rate_mode
, rxdesc
->signal
);
342 signal
= rxdesc
->signal
;
344 type
= (rxdesc
->dev_flags
& RXDONE_SIGNAL_MASK
);
346 sband
= &rt2x00dev
->bands
[rt2x00dev
->curr_band
];
347 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
348 rate
= rt2x00_get_rate(sband
->bitrates
[i
].hw_value
);
350 if (((type
== RXDONE_SIGNAL_PLCP
) &&
351 (rate
->plcp
== signal
)) ||
352 ((type
== RXDONE_SIGNAL_BITRATE
) &&
353 (rate
->bitrate
== signal
)) ||
354 ((type
== RXDONE_SIGNAL_MCS
) &&
355 (rate
->mcs
== signal
))) {
360 WARNING(rt2x00dev
, "Frame received with unrecognized signal, "
361 "signal=0x%.4x, type=%d.\n", signal
, type
);
365 void rt2x00lib_rxdone(struct rt2x00_dev
*rt2x00dev
,
366 struct queue_entry
*entry
)
368 struct rxdone_entry_desc rxdesc
;
370 struct ieee80211_rx_status
*rx_status
= &rt2x00dev
->rx_status
;
371 unsigned int header_length
;
375 * Allocate a new sk_buffer. If no new buffer available, drop the
376 * received frame and reuse the existing buffer.
378 skb
= rt2x00queue_alloc_rxskb(rt2x00dev
, entry
);
385 rt2x00queue_unmap_skb(rt2x00dev
, entry
->skb
);
388 * Extract the RXD details.
390 memset(&rxdesc
, 0, sizeof(rxdesc
));
391 rt2x00dev
->ops
->lib
->fill_rxdone(entry
, &rxdesc
);
393 /* Trim buffer to correct size */
394 skb_trim(entry
->skb
, rxdesc
.size
);
397 * The data behind the ieee80211 header must be
398 * aligned on a 4 byte boundary.
400 header_length
= ieee80211_get_hdrlen_from_skb(entry
->skb
);
401 l2pad
= !!(rxdesc
.dev_flags
& RXDONE_L2PAD
);
404 * Hardware might have stripped the IV/EIV/ICV data,
405 * in that case it is possible that the data was
406 * provided seperately (through hardware descriptor)
407 * in which case we should reinsert the data into the frame.
409 if ((rxdesc
.dev_flags
& RXDONE_CRYPTO_IV
) &&
410 (rxdesc
.flags
& RX_FLAG_IV_STRIPPED
))
411 rt2x00crypto_rx_insert_iv(entry
->skb
, l2pad
, header_length
,
414 rt2x00queue_payload_align(entry
->skb
, l2pad
, header_length
);
417 * Check if the frame was received using HT. In that case,
418 * the rate is the MCS index and should be passed to mac80211
419 * directly. Otherwise we need to translate the signal to
420 * the correct bitrate index.
422 if (rxdesc
.rate_mode
== RATE_MODE_CCK
||
423 rxdesc
.rate_mode
== RATE_MODE_OFDM
) {
424 rate_idx
= rt2x00lib_rxdone_read_signal(rt2x00dev
, &rxdesc
);
426 rxdesc
.flags
|= RX_FLAG_HT
;
427 rate_idx
= rxdesc
.signal
;
431 * Update extra components
433 rt2x00link_update_stats(rt2x00dev
, entry
->skb
, &rxdesc
);
434 rt2x00debug_update_crypto(rt2x00dev
, &rxdesc
);
436 rx_status
->mactime
= rxdesc
.timestamp
;
437 rx_status
->rate_idx
= rate_idx
;
438 rx_status
->qual
= rt2x00link_calculate_signal(rt2x00dev
, rxdesc
.rssi
);
439 rx_status
->signal
= rxdesc
.rssi
;
440 rx_status
->noise
= rxdesc
.noise
;
441 rx_status
->flag
= rxdesc
.flags
;
442 rx_status
->antenna
= rt2x00dev
->link
.ant
.active
.rx
;
445 * Send frame to mac80211 & debugfs.
446 * mac80211 will clean up the skb structure.
448 rt2x00debug_dump_frame(rt2x00dev
, DUMP_FRAME_RXDONE
, entry
->skb
);
449 ieee80211_rx_irqsafe(rt2x00dev
->hw
, entry
->skb
, rx_status
);
452 * Replace the skb with the freshly allocated one.
457 rt2x00dev
->ops
->lib
->clear_entry(entry
);
459 rt2x00queue_index_inc(entry
->queue
, Q_INDEX
);
461 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone
);
464 * Driver initialization handlers.
466 const struct rt2x00_rate rt2x00_supported_rates
[12] = {
468 .flags
= DEV_RATE_CCK
,
472 .mcs
= RATE_MCS(RATE_MODE_CCK
, 0),
475 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
,
479 .mcs
= RATE_MCS(RATE_MODE_CCK
, 1),
482 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
,
486 .mcs
= RATE_MCS(RATE_MODE_CCK
, 2),
489 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
,
493 .mcs
= RATE_MCS(RATE_MODE_CCK
, 3),
496 .flags
= DEV_RATE_OFDM
,
500 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 0),
503 .flags
= DEV_RATE_OFDM
,
507 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 1),
510 .flags
= DEV_RATE_OFDM
,
514 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 2),
517 .flags
= DEV_RATE_OFDM
,
521 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 3),
524 .flags
= DEV_RATE_OFDM
,
528 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 4),
531 .flags
= DEV_RATE_OFDM
,
535 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 5),
538 .flags
= DEV_RATE_OFDM
,
542 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 6),
545 .flags
= DEV_RATE_OFDM
,
549 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 7),
553 static void rt2x00lib_channel(struct ieee80211_channel
*entry
,
554 const int channel
, const int tx_power
,
557 entry
->center_freq
= ieee80211_channel_to_frequency(channel
);
558 entry
->hw_value
= value
;
559 entry
->max_power
= tx_power
;
560 entry
->max_antenna_gain
= 0xff;
563 static void rt2x00lib_rate(struct ieee80211_rate
*entry
,
564 const u16 index
, const struct rt2x00_rate
*rate
)
567 entry
->bitrate
= rate
->bitrate
;
568 entry
->hw_value
=index
;
569 entry
->hw_value_short
= index
;
571 if (rate
->flags
& DEV_RATE_SHORT_PREAMBLE
)
572 entry
->flags
|= IEEE80211_RATE_SHORT_PREAMBLE
;
575 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev
*rt2x00dev
,
576 struct hw_mode_spec
*spec
)
578 struct ieee80211_hw
*hw
= rt2x00dev
->hw
;
579 struct ieee80211_channel
*channels
;
580 struct ieee80211_rate
*rates
;
581 unsigned int num_rates
;
585 if (spec
->supported_rates
& SUPPORT_RATE_CCK
)
587 if (spec
->supported_rates
& SUPPORT_RATE_OFDM
)
590 channels
= kzalloc(sizeof(*channels
) * spec
->num_channels
, GFP_KERNEL
);
594 rates
= kzalloc(sizeof(*rates
) * num_rates
, GFP_KERNEL
);
596 goto exit_free_channels
;
599 * Initialize Rate list.
601 for (i
= 0; i
< num_rates
; i
++)
602 rt2x00lib_rate(&rates
[i
], i
, rt2x00_get_rate(i
));
605 * Initialize Channel list.
607 for (i
= 0; i
< spec
->num_channels
; i
++) {
608 rt2x00lib_channel(&channels
[i
],
609 spec
->channels
[i
].channel
,
610 spec
->channels_info
[i
].tx_power1
, i
);
614 * Intitialize 802.11b, 802.11g
618 if (spec
->supported_bands
& SUPPORT_BAND_2GHZ
) {
619 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].n_channels
= 14;
620 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].n_bitrates
= num_rates
;
621 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].channels
= channels
;
622 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].bitrates
= rates
;
623 hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
] =
624 &rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
];
625 memcpy(&rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].ht_cap
,
626 &spec
->ht
, sizeof(spec
->ht
));
630 * Intitialize 802.11a
632 * Channels: OFDM, UNII, HiperLAN2.
634 if (spec
->supported_bands
& SUPPORT_BAND_5GHZ
) {
635 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].n_channels
=
636 spec
->num_channels
- 14;
637 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].n_bitrates
=
639 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].channels
= &channels
[14];
640 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].bitrates
= &rates
[4];
641 hw
->wiphy
->bands
[IEEE80211_BAND_5GHZ
] =
642 &rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
];
643 memcpy(&rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].ht_cap
,
644 &spec
->ht
, sizeof(spec
->ht
));
651 ERROR(rt2x00dev
, "Allocation ieee80211 modes failed.\n");
655 static void rt2x00lib_remove_hw(struct rt2x00_dev
*rt2x00dev
)
657 if (test_bit(DEVICE_STATE_REGISTERED_HW
, &rt2x00dev
->flags
))
658 ieee80211_unregister_hw(rt2x00dev
->hw
);
660 if (likely(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
])) {
661 kfree(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
]->channels
);
662 kfree(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
]->bitrates
);
663 rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
] = NULL
;
664 rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_5GHZ
] = NULL
;
667 kfree(rt2x00dev
->spec
.channels_info
);
670 static int rt2x00lib_probe_hw(struct rt2x00_dev
*rt2x00dev
)
672 struct hw_mode_spec
*spec
= &rt2x00dev
->spec
;
675 if (test_bit(DEVICE_STATE_REGISTERED_HW
, &rt2x00dev
->flags
))
679 * Initialize HW modes.
681 status
= rt2x00lib_probe_hw_modes(rt2x00dev
, spec
);
686 * Initialize HW fields.
688 rt2x00dev
->hw
->queues
= rt2x00dev
->ops
->tx_queues
;
693 status
= ieee80211_register_hw(rt2x00dev
->hw
);
697 set_bit(DEVICE_STATE_REGISTERED_HW
, &rt2x00dev
->flags
);
703 * Initialization/uninitialization handlers.
705 static void rt2x00lib_uninitialize(struct rt2x00_dev
*rt2x00dev
)
707 if (!test_and_clear_bit(DEVICE_STATE_INITIALIZED
, &rt2x00dev
->flags
))
711 * Unregister extra components.
713 rt2x00rfkill_unregister(rt2x00dev
);
716 * Allow the HW to uninitialize.
718 rt2x00dev
->ops
->lib
->uninitialize(rt2x00dev
);
721 * Free allocated queue entries.
723 rt2x00queue_uninitialize(rt2x00dev
);
726 static int rt2x00lib_initialize(struct rt2x00_dev
*rt2x00dev
)
730 if (test_bit(DEVICE_STATE_INITIALIZED
, &rt2x00dev
->flags
))
734 * Allocate all queue entries.
736 status
= rt2x00queue_initialize(rt2x00dev
);
741 * Initialize the device.
743 status
= rt2x00dev
->ops
->lib
->initialize(rt2x00dev
);
745 rt2x00queue_uninitialize(rt2x00dev
);
749 set_bit(DEVICE_STATE_INITIALIZED
, &rt2x00dev
->flags
);
752 * Register the extra components.
754 rt2x00rfkill_register(rt2x00dev
);
759 int rt2x00lib_start(struct rt2x00_dev
*rt2x00dev
)
763 if (test_bit(DEVICE_STATE_STARTED
, &rt2x00dev
->flags
))
767 * If this is the first interface which is added,
768 * we should load the firmware now.
770 retval
= rt2x00lib_load_firmware(rt2x00dev
);
775 * Initialize the device.
777 retval
= rt2x00lib_initialize(rt2x00dev
);
781 rt2x00dev
->intf_ap_count
= 0;
782 rt2x00dev
->intf_sta_count
= 0;
783 rt2x00dev
->intf_associated
= 0;
785 set_bit(DEVICE_STATE_STARTED
, &rt2x00dev
->flags
);
790 void rt2x00lib_stop(struct rt2x00_dev
*rt2x00dev
)
792 if (!test_and_clear_bit(DEVICE_STATE_STARTED
, &rt2x00dev
->flags
))
796 * Perhaps we can add something smarter here,
797 * but for now just disabling the radio should do.
799 rt2x00lib_disable_radio(rt2x00dev
);
801 rt2x00dev
->intf_ap_count
= 0;
802 rt2x00dev
->intf_sta_count
= 0;
803 rt2x00dev
->intf_associated
= 0;
807 * driver allocation handlers.
809 int rt2x00lib_probe_dev(struct rt2x00_dev
*rt2x00dev
)
811 int retval
= -ENOMEM
;
813 mutex_init(&rt2x00dev
->csr_mutex
);
816 * Make room for rt2x00_intf inside the per-interface
817 * structure ieee80211_vif.
819 rt2x00dev
->hw
->vif_data_size
= sizeof(struct rt2x00_intf
);
822 * Determine which operating modes are supported, all modes
823 * which require beaconing, depend on the availability of
826 rt2x00dev
->hw
->wiphy
->interface_modes
= BIT(NL80211_IFTYPE_STATION
);
827 if (rt2x00dev
->ops
->bcn
->entry_num
> 0)
828 rt2x00dev
->hw
->wiphy
->interface_modes
|=
829 BIT(NL80211_IFTYPE_ADHOC
) |
830 BIT(NL80211_IFTYPE_AP
) |
831 BIT(NL80211_IFTYPE_MESH_POINT
) |
832 BIT(NL80211_IFTYPE_WDS
);
835 * Let the driver probe the device to detect the capabilities.
837 retval
= rt2x00dev
->ops
->lib
->probe_hw(rt2x00dev
);
839 ERROR(rt2x00dev
, "Failed to allocate device.\n");
844 * Initialize configuration work.
846 INIT_WORK(&rt2x00dev
->intf_work
, rt2x00lib_intf_scheduled
);
847 INIT_WORK(&rt2x00dev
->filter_work
, rt2x00lib_packetfilter_scheduled
);
850 * Allocate queue array.
852 retval
= rt2x00queue_allocate(rt2x00dev
);
857 * Initialize ieee80211 structure.
859 retval
= rt2x00lib_probe_hw(rt2x00dev
);
861 ERROR(rt2x00dev
, "Failed to initialize hw.\n");
866 * Register extra components.
868 rt2x00link_register(rt2x00dev
);
869 rt2x00leds_register(rt2x00dev
);
870 rt2x00rfkill_allocate(rt2x00dev
);
871 rt2x00debug_register(rt2x00dev
);
873 set_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
);
878 rt2x00lib_remove_dev(rt2x00dev
);
882 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev
);
884 void rt2x00lib_remove_dev(struct rt2x00_dev
*rt2x00dev
)
886 clear_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
);
891 rt2x00lib_disable_radio(rt2x00dev
);
894 * Uninitialize device.
896 rt2x00lib_uninitialize(rt2x00dev
);
899 * Free extra components
901 rt2x00debug_deregister(rt2x00dev
);
902 rt2x00rfkill_free(rt2x00dev
);
903 rt2x00leds_unregister(rt2x00dev
);
906 * Free ieee80211_hw memory.
908 rt2x00lib_remove_hw(rt2x00dev
);
911 * Free firmware image.
913 rt2x00lib_free_firmware(rt2x00dev
);
916 * Free queue structures.
918 rt2x00queue_free(rt2x00dev
);
920 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev
);
923 * Device state handlers
926 int rt2x00lib_suspend(struct rt2x00_dev
*rt2x00dev
, pm_message_t state
)
928 NOTICE(rt2x00dev
, "Going to sleep.\n");
931 * Prevent mac80211 from accessing driver while suspended.
933 if (!test_and_clear_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
))
937 * Cleanup as much as possible.
939 rt2x00lib_uninitialize(rt2x00dev
);
942 * Suspend/disable extra components.
944 rt2x00leds_suspend(rt2x00dev
);
945 rt2x00debug_deregister(rt2x00dev
);
948 * Set device mode to sleep for power management,
949 * on some hardware this call seems to consistently fail.
950 * From the specifications it is hard to tell why it fails,
951 * and if this is a "bad thing".
952 * Overall it is safe to just ignore the failure and
953 * continue suspending. The only downside is that the
954 * device will not be in optimal power save mode, but with
955 * the radio and the other components already disabled the
956 * device is as good as disabled.
958 if (rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_SLEEP
))
959 WARNING(rt2x00dev
, "Device failed to enter sleep state, "
960 "continue suspending.\n");
964 EXPORT_SYMBOL_GPL(rt2x00lib_suspend
);
966 int rt2x00lib_resume(struct rt2x00_dev
*rt2x00dev
)
968 NOTICE(rt2x00dev
, "Waking up.\n");
971 * Restore/enable extra components.
973 rt2x00debug_register(rt2x00dev
);
974 rt2x00leds_resume(rt2x00dev
);
977 * We are ready again to receive requests from mac80211.
979 set_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
);
983 EXPORT_SYMBOL_GPL(rt2x00lib_resume
);
984 #endif /* CONFIG_PM */
987 * rt2x00lib module information.
989 MODULE_AUTHOR(DRV_PROJECT
);
990 MODULE_VERSION(DRV_VERSION
);
991 MODULE_DESCRIPTION("rt2x00 library");
992 MODULE_LICENSE("GPL");