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 test_bit(TXDONE_UNKNOWN
, &txdesc
->flags
);
265 rt2x00dev
->link
.qual
.tx_failed
+=
266 test_bit(TXDONE_FAILURE
, &txdesc
->flags
);
268 rate_idx
= skbdesc
->tx_rate_idx
;
269 rate_flags
= skbdesc
->tx_rate_flags
;
272 * Initialize TX status
274 memset(&tx_info
->status
, 0, sizeof(tx_info
->status
));
275 tx_info
->status
.ack_signal
= 0;
276 tx_info
->status
.rates
[0].idx
= rate_idx
;
277 tx_info
->status
.rates
[0].flags
= rate_flags
;
278 tx_info
->status
.rates
[0].count
= txdesc
->retry
+ 1;
279 tx_info
->status
.rates
[1].idx
= -1; /* terminate */
281 if (!(tx_info
->flags
& IEEE80211_TX_CTL_NO_ACK
)) {
282 if (test_bit(TXDONE_SUCCESS
, &txdesc
->flags
) ||
283 test_bit(TXDONE_UNKNOWN
, &txdesc
->flags
))
284 tx_info
->flags
|= IEEE80211_TX_STAT_ACK
;
285 else if (test_bit(TXDONE_FAILURE
, &txdesc
->flags
))
286 rt2x00dev
->low_level_stats
.dot11ACKFailureCount
++;
289 if (rate_flags
& IEEE80211_TX_RC_USE_RTS_CTS
) {
290 if (test_bit(TXDONE_SUCCESS
, &txdesc
->flags
) ||
291 test_bit(TXDONE_UNKNOWN
, &txdesc
->flags
))
292 rt2x00dev
->low_level_stats
.dot11RTSSuccessCount
++;
293 else if (test_bit(TXDONE_FAILURE
, &txdesc
->flags
))
294 rt2x00dev
->low_level_stats
.dot11RTSFailureCount
++;
298 * Only send the status report to mac80211 when TX status was
299 * requested by it. If this was a extra frame coming through
300 * a mac80211 library call (RTS/CTS) then we should not send the
301 * status report back.
303 if (tx_info
->flags
& IEEE80211_TX_CTL_REQ_TX_STATUS
)
304 ieee80211_tx_status_irqsafe(rt2x00dev
->hw
, entry
->skb
);
306 dev_kfree_skb_irq(entry
->skb
);
309 * Make this entry available for reuse.
314 rt2x00dev
->ops
->lib
->clear_entry(entry
);
316 clear_bit(ENTRY_OWNER_DEVICE_DATA
, &entry
->flags
);
317 rt2x00queue_index_inc(entry
->queue
, Q_INDEX_DONE
);
320 * If the data queue was below the threshold before the txdone
321 * handler we must make sure the packet queue in the mac80211 stack
322 * is reenabled when the txdone handler has finished.
324 if (!rt2x00queue_threshold(entry
->queue
))
325 ieee80211_wake_queue(rt2x00dev
->hw
, qid
);
327 EXPORT_SYMBOL_GPL(rt2x00lib_txdone
);
329 static int rt2x00lib_rxdone_read_signal(struct rt2x00_dev
*rt2x00dev
,
330 struct rxdone_entry_desc
*rxdesc
)
332 struct ieee80211_supported_band
*sband
;
333 const struct rt2x00_rate
*rate
;
339 * For non-HT rates the MCS value needs to contain the
340 * actually used rate modulation (CCK or OFDM).
342 if (rxdesc
->dev_flags
& RXDONE_SIGNAL_MCS
)
343 signal
= RATE_MCS(rxdesc
->rate_mode
, rxdesc
->signal
);
345 signal
= rxdesc
->signal
;
347 type
= (rxdesc
->dev_flags
& RXDONE_SIGNAL_MASK
);
349 sband
= &rt2x00dev
->bands
[rt2x00dev
->curr_band
];
350 for (i
= 0; i
< sband
->n_bitrates
; i
++) {
351 rate
= rt2x00_get_rate(sband
->bitrates
[i
].hw_value
);
353 if (((type
== RXDONE_SIGNAL_PLCP
) &&
354 (rate
->plcp
== signal
)) ||
355 ((type
== RXDONE_SIGNAL_BITRATE
) &&
356 (rate
->bitrate
== signal
)) ||
357 ((type
== RXDONE_SIGNAL_MCS
) &&
358 (rate
->mcs
== signal
))) {
363 WARNING(rt2x00dev
, "Frame received with unrecognized signal, "
364 "signal=0x%.4x, type=%d.\n", signal
, type
);
368 void rt2x00lib_rxdone(struct rt2x00_dev
*rt2x00dev
,
369 struct queue_entry
*entry
)
371 struct rxdone_entry_desc rxdesc
;
373 struct ieee80211_rx_status
*rx_status
= &rt2x00dev
->rx_status
;
374 unsigned int header_length
;
378 * Allocate a new sk_buffer. If no new buffer available, drop the
379 * received frame and reuse the existing buffer.
381 skb
= rt2x00queue_alloc_rxskb(rt2x00dev
, entry
);
388 rt2x00queue_unmap_skb(rt2x00dev
, entry
->skb
);
391 * Extract the RXD details.
393 memset(&rxdesc
, 0, sizeof(rxdesc
));
394 rt2x00dev
->ops
->lib
->fill_rxdone(entry
, &rxdesc
);
396 /* Trim buffer to correct size */
397 skb_trim(entry
->skb
, rxdesc
.size
);
400 * The data behind the ieee80211 header must be
401 * aligned on a 4 byte boundary.
403 header_length
= ieee80211_get_hdrlen_from_skb(entry
->skb
);
404 l2pad
= !!(rxdesc
.dev_flags
& RXDONE_L2PAD
);
407 * Hardware might have stripped the IV/EIV/ICV data,
408 * in that case it is possible that the data was
409 * provided seperately (through hardware descriptor)
410 * in which case we should reinsert the data into the frame.
412 if ((rxdesc
.dev_flags
& RXDONE_CRYPTO_IV
) &&
413 (rxdesc
.flags
& RX_FLAG_IV_STRIPPED
))
414 rt2x00crypto_rx_insert_iv(entry
->skb
, l2pad
, header_length
,
417 rt2x00queue_payload_align(entry
->skb
, l2pad
, header_length
);
420 * Check if the frame was received using HT. In that case,
421 * the rate is the MCS index and should be passed to mac80211
422 * directly. Otherwise we need to translate the signal to
423 * the correct bitrate index.
425 if (rxdesc
.rate_mode
== RATE_MODE_CCK
||
426 rxdesc
.rate_mode
== RATE_MODE_OFDM
) {
427 rate_idx
= rt2x00lib_rxdone_read_signal(rt2x00dev
, &rxdesc
);
429 rxdesc
.flags
|= RX_FLAG_HT
;
430 rate_idx
= rxdesc
.signal
;
434 * Update extra components
436 rt2x00link_update_stats(rt2x00dev
, entry
->skb
, &rxdesc
);
437 rt2x00debug_update_crypto(rt2x00dev
, &rxdesc
);
439 rx_status
->mactime
= rxdesc
.timestamp
;
440 rx_status
->rate_idx
= rate_idx
;
441 rx_status
->qual
= rt2x00link_calculate_signal(rt2x00dev
, rxdesc
.rssi
);
442 rx_status
->signal
= rxdesc
.rssi
;
443 rx_status
->noise
= rxdesc
.noise
;
444 rx_status
->flag
= rxdesc
.flags
;
445 rx_status
->antenna
= rt2x00dev
->link
.ant
.active
.rx
;
448 * Send frame to mac80211 & debugfs.
449 * mac80211 will clean up the skb structure.
451 rt2x00debug_dump_frame(rt2x00dev
, DUMP_FRAME_RXDONE
, entry
->skb
);
452 memcpy(IEEE80211_SKB_RXCB(entry
->skb
), rx_status
, sizeof(*rx_status
));
453 ieee80211_rx_irqsafe(rt2x00dev
->hw
, entry
->skb
);
456 * Replace the skb with the freshly allocated one.
461 rt2x00dev
->ops
->lib
->clear_entry(entry
);
463 rt2x00queue_index_inc(entry
->queue
, Q_INDEX
);
465 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone
);
468 * Driver initialization handlers.
470 const struct rt2x00_rate rt2x00_supported_rates
[12] = {
472 .flags
= DEV_RATE_CCK
,
476 .mcs
= RATE_MCS(RATE_MODE_CCK
, 0),
479 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
,
483 .mcs
= RATE_MCS(RATE_MODE_CCK
, 1),
486 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
,
490 .mcs
= RATE_MCS(RATE_MODE_CCK
, 2),
493 .flags
= DEV_RATE_CCK
| DEV_RATE_SHORT_PREAMBLE
,
497 .mcs
= RATE_MCS(RATE_MODE_CCK
, 3),
500 .flags
= DEV_RATE_OFDM
,
504 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 0),
507 .flags
= DEV_RATE_OFDM
,
511 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 1),
514 .flags
= DEV_RATE_OFDM
,
518 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 2),
521 .flags
= DEV_RATE_OFDM
,
525 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 3),
528 .flags
= DEV_RATE_OFDM
,
532 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 4),
535 .flags
= DEV_RATE_OFDM
,
539 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 5),
542 .flags
= DEV_RATE_OFDM
,
546 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 6),
549 .flags
= DEV_RATE_OFDM
,
553 .mcs
= RATE_MCS(RATE_MODE_OFDM
, 7),
557 static void rt2x00lib_channel(struct ieee80211_channel
*entry
,
558 const int channel
, const int tx_power
,
561 entry
->center_freq
= ieee80211_channel_to_frequency(channel
);
562 entry
->hw_value
= value
;
563 entry
->max_power
= tx_power
;
564 entry
->max_antenna_gain
= 0xff;
567 static void rt2x00lib_rate(struct ieee80211_rate
*entry
,
568 const u16 index
, const struct rt2x00_rate
*rate
)
571 entry
->bitrate
= rate
->bitrate
;
572 entry
->hw_value
=index
;
573 entry
->hw_value_short
= index
;
575 if (rate
->flags
& DEV_RATE_SHORT_PREAMBLE
)
576 entry
->flags
|= IEEE80211_RATE_SHORT_PREAMBLE
;
579 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev
*rt2x00dev
,
580 struct hw_mode_spec
*spec
)
582 struct ieee80211_hw
*hw
= rt2x00dev
->hw
;
583 struct ieee80211_channel
*channels
;
584 struct ieee80211_rate
*rates
;
585 unsigned int num_rates
;
589 if (spec
->supported_rates
& SUPPORT_RATE_CCK
)
591 if (spec
->supported_rates
& SUPPORT_RATE_OFDM
)
594 channels
= kzalloc(sizeof(*channels
) * spec
->num_channels
, GFP_KERNEL
);
598 rates
= kzalloc(sizeof(*rates
) * num_rates
, GFP_KERNEL
);
600 goto exit_free_channels
;
603 * Initialize Rate list.
605 for (i
= 0; i
< num_rates
; i
++)
606 rt2x00lib_rate(&rates
[i
], i
, rt2x00_get_rate(i
));
609 * Initialize Channel list.
611 for (i
= 0; i
< spec
->num_channels
; i
++) {
612 rt2x00lib_channel(&channels
[i
],
613 spec
->channels
[i
].channel
,
614 spec
->channels_info
[i
].tx_power1
, i
);
618 * Intitialize 802.11b, 802.11g
622 if (spec
->supported_bands
& SUPPORT_BAND_2GHZ
) {
623 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].n_channels
= 14;
624 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].n_bitrates
= num_rates
;
625 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].channels
= channels
;
626 rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].bitrates
= rates
;
627 hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
] =
628 &rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
];
629 memcpy(&rt2x00dev
->bands
[IEEE80211_BAND_2GHZ
].ht_cap
,
630 &spec
->ht
, sizeof(spec
->ht
));
634 * Intitialize 802.11a
636 * Channels: OFDM, UNII, HiperLAN2.
638 if (spec
->supported_bands
& SUPPORT_BAND_5GHZ
) {
639 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].n_channels
=
640 spec
->num_channels
- 14;
641 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].n_bitrates
=
643 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].channels
= &channels
[14];
644 rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].bitrates
= &rates
[4];
645 hw
->wiphy
->bands
[IEEE80211_BAND_5GHZ
] =
646 &rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
];
647 memcpy(&rt2x00dev
->bands
[IEEE80211_BAND_5GHZ
].ht_cap
,
648 &spec
->ht
, sizeof(spec
->ht
));
655 ERROR(rt2x00dev
, "Allocation ieee80211 modes failed.\n");
659 static void rt2x00lib_remove_hw(struct rt2x00_dev
*rt2x00dev
)
661 if (test_bit(DEVICE_STATE_REGISTERED_HW
, &rt2x00dev
->flags
))
662 ieee80211_unregister_hw(rt2x00dev
->hw
);
664 if (likely(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
])) {
665 kfree(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
]->channels
);
666 kfree(rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
]->bitrates
);
667 rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
] = NULL
;
668 rt2x00dev
->hw
->wiphy
->bands
[IEEE80211_BAND_5GHZ
] = NULL
;
671 kfree(rt2x00dev
->spec
.channels_info
);
674 static int rt2x00lib_probe_hw(struct rt2x00_dev
*rt2x00dev
)
676 struct hw_mode_spec
*spec
= &rt2x00dev
->spec
;
679 if (test_bit(DEVICE_STATE_REGISTERED_HW
, &rt2x00dev
->flags
))
683 * Initialize HW modes.
685 status
= rt2x00lib_probe_hw_modes(rt2x00dev
, spec
);
690 * Initialize HW fields.
692 rt2x00dev
->hw
->queues
= rt2x00dev
->ops
->tx_queues
;
697 status
= ieee80211_register_hw(rt2x00dev
->hw
);
701 set_bit(DEVICE_STATE_REGISTERED_HW
, &rt2x00dev
->flags
);
707 * Initialization/uninitialization handlers.
709 static void rt2x00lib_uninitialize(struct rt2x00_dev
*rt2x00dev
)
711 if (!test_and_clear_bit(DEVICE_STATE_INITIALIZED
, &rt2x00dev
->flags
))
715 * Unregister extra components.
717 rt2x00rfkill_unregister(rt2x00dev
);
720 * Allow the HW to uninitialize.
722 rt2x00dev
->ops
->lib
->uninitialize(rt2x00dev
);
725 * Free allocated queue entries.
727 rt2x00queue_uninitialize(rt2x00dev
);
730 static int rt2x00lib_initialize(struct rt2x00_dev
*rt2x00dev
)
734 if (test_bit(DEVICE_STATE_INITIALIZED
, &rt2x00dev
->flags
))
738 * Allocate all queue entries.
740 status
= rt2x00queue_initialize(rt2x00dev
);
745 * Initialize the device.
747 status
= rt2x00dev
->ops
->lib
->initialize(rt2x00dev
);
749 rt2x00queue_uninitialize(rt2x00dev
);
753 set_bit(DEVICE_STATE_INITIALIZED
, &rt2x00dev
->flags
);
756 * Register the extra components.
758 rt2x00rfkill_register(rt2x00dev
);
763 int rt2x00lib_start(struct rt2x00_dev
*rt2x00dev
)
767 if (test_bit(DEVICE_STATE_STARTED
, &rt2x00dev
->flags
))
771 * If this is the first interface which is added,
772 * we should load the firmware now.
774 retval
= rt2x00lib_load_firmware(rt2x00dev
);
779 * Initialize the device.
781 retval
= rt2x00lib_initialize(rt2x00dev
);
785 rt2x00dev
->intf_ap_count
= 0;
786 rt2x00dev
->intf_sta_count
= 0;
787 rt2x00dev
->intf_associated
= 0;
789 set_bit(DEVICE_STATE_STARTED
, &rt2x00dev
->flags
);
794 void rt2x00lib_stop(struct rt2x00_dev
*rt2x00dev
)
796 if (!test_and_clear_bit(DEVICE_STATE_STARTED
, &rt2x00dev
->flags
))
800 * Perhaps we can add something smarter here,
801 * but for now just disabling the radio should do.
803 rt2x00lib_disable_radio(rt2x00dev
);
805 rt2x00dev
->intf_ap_count
= 0;
806 rt2x00dev
->intf_sta_count
= 0;
807 rt2x00dev
->intf_associated
= 0;
811 * driver allocation handlers.
813 int rt2x00lib_probe_dev(struct rt2x00_dev
*rt2x00dev
)
815 int retval
= -ENOMEM
;
817 mutex_init(&rt2x00dev
->csr_mutex
);
820 * Make room for rt2x00_intf inside the per-interface
821 * structure ieee80211_vif.
823 rt2x00dev
->hw
->vif_data_size
= sizeof(struct rt2x00_intf
);
826 * Determine which operating modes are supported, all modes
827 * which require beaconing, depend on the availability of
830 rt2x00dev
->hw
->wiphy
->interface_modes
= BIT(NL80211_IFTYPE_STATION
);
831 if (rt2x00dev
->ops
->bcn
->entry_num
> 0)
832 rt2x00dev
->hw
->wiphy
->interface_modes
|=
833 BIT(NL80211_IFTYPE_ADHOC
) |
834 BIT(NL80211_IFTYPE_AP
) |
835 BIT(NL80211_IFTYPE_MESH_POINT
) |
836 BIT(NL80211_IFTYPE_WDS
);
839 * Let the driver probe the device to detect the capabilities.
841 retval
= rt2x00dev
->ops
->lib
->probe_hw(rt2x00dev
);
843 ERROR(rt2x00dev
, "Failed to allocate device.\n");
848 * Initialize configuration work.
850 INIT_WORK(&rt2x00dev
->intf_work
, rt2x00lib_intf_scheduled
);
851 INIT_WORK(&rt2x00dev
->filter_work
, rt2x00lib_packetfilter_scheduled
);
854 * Allocate queue array.
856 retval
= rt2x00queue_allocate(rt2x00dev
);
861 * Initialize ieee80211 structure.
863 retval
= rt2x00lib_probe_hw(rt2x00dev
);
865 ERROR(rt2x00dev
, "Failed to initialize hw.\n");
870 * Register extra components.
872 rt2x00link_register(rt2x00dev
);
873 rt2x00leds_register(rt2x00dev
);
874 rt2x00rfkill_allocate(rt2x00dev
);
875 rt2x00debug_register(rt2x00dev
);
877 set_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
);
882 rt2x00lib_remove_dev(rt2x00dev
);
886 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev
);
888 void rt2x00lib_remove_dev(struct rt2x00_dev
*rt2x00dev
)
890 clear_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
);
895 rt2x00lib_disable_radio(rt2x00dev
);
898 * Uninitialize device.
900 rt2x00lib_uninitialize(rt2x00dev
);
903 * Free extra components
905 rt2x00debug_deregister(rt2x00dev
);
906 rt2x00rfkill_free(rt2x00dev
);
907 rt2x00leds_unregister(rt2x00dev
);
910 * Free ieee80211_hw memory.
912 rt2x00lib_remove_hw(rt2x00dev
);
915 * Free firmware image.
917 rt2x00lib_free_firmware(rt2x00dev
);
920 * Free queue structures.
922 rt2x00queue_free(rt2x00dev
);
924 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev
);
927 * Device state handlers
930 int rt2x00lib_suspend(struct rt2x00_dev
*rt2x00dev
, pm_message_t state
)
932 NOTICE(rt2x00dev
, "Going to sleep.\n");
935 * Prevent mac80211 from accessing driver while suspended.
937 if (!test_and_clear_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
))
941 * Cleanup as much as possible.
943 rt2x00lib_uninitialize(rt2x00dev
);
946 * Suspend/disable extra components.
948 rt2x00leds_suspend(rt2x00dev
);
949 rt2x00debug_deregister(rt2x00dev
);
952 * Set device mode to sleep for power management,
953 * on some hardware this call seems to consistently fail.
954 * From the specifications it is hard to tell why it fails,
955 * and if this is a "bad thing".
956 * Overall it is safe to just ignore the failure and
957 * continue suspending. The only downside is that the
958 * device will not be in optimal power save mode, but with
959 * the radio and the other components already disabled the
960 * device is as good as disabled.
962 if (rt2x00dev
->ops
->lib
->set_device_state(rt2x00dev
, STATE_SLEEP
))
963 WARNING(rt2x00dev
, "Device failed to enter sleep state, "
964 "continue suspending.\n");
968 EXPORT_SYMBOL_GPL(rt2x00lib_suspend
);
970 int rt2x00lib_resume(struct rt2x00_dev
*rt2x00dev
)
972 NOTICE(rt2x00dev
, "Waking up.\n");
975 * Restore/enable extra components.
977 rt2x00debug_register(rt2x00dev
);
978 rt2x00leds_resume(rt2x00dev
);
981 * We are ready again to receive requests from mac80211.
983 set_bit(DEVICE_STATE_PRESENT
, &rt2x00dev
->flags
);
987 EXPORT_SYMBOL_GPL(rt2x00lib_resume
);
988 #endif /* CONFIG_PM */
991 * rt2x00lib module information.
993 MODULE_AUTHOR(DRV_PROJECT
);
994 MODULE_VERSION(DRV_VERSION
);
995 MODULE_DESCRIPTION("rt2x00 library");
996 MODULE_LICENSE("GPL");