2 Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
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>
28 #include <linux/slab.h>
31 #include "rt2x00lib.h"
34 * Radio control handlers.
36 int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev)
41 * Don't enable the radio twice.
42 * And check if the hardware button has been disabled.
44 if (test_bit(DEVICE_STATE_ENABLED_RADIO, &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_intf_scheduled_iter(void *data, u8 *mac,
123 struct ieee80211_vif *vif)
125 struct rt2x00_dev *rt2x00dev = data;
126 struct rt2x00_intf *intf = vif_to_intf(vif);
130 * Copy all data we need during this action under the protection
131 * of a spinlock. Otherwise race conditions might occur which results
132 * into an invalid configuration.
134 spin_lock(&intf->lock);
136 delayed_flags = intf->delayed_flags;
137 intf->delayed_flags = 0;
139 spin_unlock(&intf->lock);
142 * It is possible the radio was disabled while the work had been
143 * scheduled. If that happens we should return here immediately,
144 * note that in the spinlock protected area above the delayed_flags
145 * have been cleared correctly.
147 if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
150 if (delayed_flags & DELAYED_UPDATE_BEACON)
151 rt2x00queue_update_beacon(rt2x00dev, vif, true);
154 static void rt2x00lib_intf_scheduled(struct work_struct *work)
156 struct rt2x00_dev *rt2x00dev =
157 container_of(work, struct rt2x00_dev, intf_work);
160 * Iterate over each interface and perform the
161 * requested configurations.
163 ieee80211_iterate_active_interfaces(rt2x00dev->hw,
164 rt2x00lib_intf_scheduled_iter,
169 * Interrupt context handlers.
171 static void rt2x00lib_beacondone_iter(void *data, u8 *mac,
172 struct ieee80211_vif *vif)
174 struct rt2x00_intf *intf = vif_to_intf(vif);
176 if (vif->type != NL80211_IFTYPE_AP &&
177 vif->type != NL80211_IFTYPE_ADHOC &&
178 vif->type != NL80211_IFTYPE_MESH_POINT &&
179 vif->type != NL80211_IFTYPE_WDS)
182 spin_lock(&intf->lock);
183 intf->delayed_flags |= DELAYED_UPDATE_BEACON;
184 spin_unlock(&intf->lock);
187 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev)
189 if (!test_bit(DEVICE_STATE_ENABLED_RADIO, &rt2x00dev->flags))
192 ieee80211_iterate_active_interfaces_atomic(rt2x00dev->hw,
193 rt2x00lib_beacondone_iter,
196 ieee80211_queue_work(rt2x00dev->hw, &rt2x00dev->intf_work);
198 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone);
200 void rt2x00lib_txdone(struct queue_entry *entry,
201 struct txdone_entry_desc *txdesc)
203 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
204 struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb);
205 struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb);
206 enum data_queue_qid qid = skb_get_queue_mapping(entry->skb);
207 unsigned int header_length = ieee80211_get_hdrlen_from_skb(entry->skb);
208 u8 rate_idx, rate_flags, retry_rates;
209 u8 skbdesc_flags = skbdesc->flags;
216 rt2x00queue_unmap_skb(rt2x00dev, entry->skb);
219 * Remove L2 padding which was added during
221 if (test_bit(DRIVER_REQUIRE_L2PAD, &rt2x00dev->flags))
222 rt2x00queue_remove_l2pad(entry->skb, header_length);
225 * If the IV/EIV data was stripped from the frame before it was
226 * passed to the hardware, we should now reinsert it again because
227 * mac80211 will expect the the same data to be present it the
228 * frame as it was passed to us.
230 if (test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags))
231 rt2x00crypto_tx_insert_iv(entry->skb, header_length);
234 * Send frame to debugfs immediately, after this call is completed
235 * we are going to overwrite the skb->cb array.
237 rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_TXDONE, entry->skb);
240 * Determine if the frame has been successfully transmitted.
243 test_bit(TXDONE_SUCCESS, &txdesc->flags) ||
244 test_bit(TXDONE_UNKNOWN, &txdesc->flags) ||
245 test_bit(TXDONE_FALLBACK, &txdesc->flags);
248 * Update TX statistics.
250 rt2x00dev->link.qual.tx_success += success;
251 rt2x00dev->link.qual.tx_failed += !success;
253 rate_idx = skbdesc->tx_rate_idx;
254 rate_flags = skbdesc->tx_rate_flags;
255 retry_rates = test_bit(TXDONE_FALLBACK, &txdesc->flags) ?
256 (txdesc->retry + 1) : 1;
259 * Initialize TX status
261 memset(&tx_info->status, 0, sizeof(tx_info->status));
262 tx_info->status.ack_signal = 0;
265 * Frame was send with retries, hardware tried
266 * different rates to send out the frame, at each
267 * retry it lowered the rate 1 step.
269 for (i = 0; i < retry_rates && i < IEEE80211_TX_MAX_RATES; i++) {
270 tx_info->status.rates[i].idx = rate_idx - i;
271 tx_info->status.rates[i].flags = rate_flags;
272 tx_info->status.rates[i].count = 1;
274 if (i < (IEEE80211_TX_MAX_RATES - 1))
275 tx_info->status.rates[i].idx = -1; /* terminate */
277 if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK)) {
279 tx_info->flags |= IEEE80211_TX_STAT_ACK;
281 rt2x00dev->low_level_stats.dot11ACKFailureCount++;
284 if (rate_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
286 rt2x00dev->low_level_stats.dot11RTSSuccessCount++;
288 rt2x00dev->low_level_stats.dot11RTSFailureCount++;
292 * Only send the status report to mac80211 when it's a frame
293 * that originated in mac80211. If this was a extra frame coming
294 * through a mac80211 library call (RTS/CTS) then we should not
295 * send the status report back.
297 if (!(skbdesc_flags & SKBDESC_NOT_MAC80211))
298 ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb);
300 dev_kfree_skb_irq(entry->skb);
303 * Make this entry available for reuse.
308 rt2x00dev->ops->lib->clear_entry(entry);
310 clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags);
311 rt2x00queue_index_inc(entry->queue, Q_INDEX_DONE);
314 * If the data queue was below the threshold before the txdone
315 * handler we must make sure the packet queue in the mac80211 stack
316 * is reenabled when the txdone handler has finished.
318 if (!rt2x00queue_threshold(entry->queue))
319 ieee80211_wake_queue(rt2x00dev->hw, qid);
321 EXPORT_SYMBOL_GPL(rt2x00lib_txdone);
323 static int rt2x00lib_rxdone_read_signal(struct rt2x00_dev *rt2x00dev,
324 struct rxdone_entry_desc *rxdesc)
326 struct ieee80211_supported_band *sband;
327 const struct rt2x00_rate *rate;
333 * For non-HT rates the MCS value needs to contain the
334 * actually used rate modulation (CCK or OFDM).
336 if (rxdesc->dev_flags & RXDONE_SIGNAL_MCS)
337 signal = RATE_MCS(rxdesc->rate_mode, rxdesc->signal);
339 signal = rxdesc->signal;
341 type = (rxdesc->dev_flags & RXDONE_SIGNAL_MASK);
343 sband = &rt2x00dev->bands[rt2x00dev->curr_band];
344 for (i = 0; i < sband->n_bitrates; i++) {
345 rate = rt2x00_get_rate(sband->bitrates[i].hw_value);
347 if (((type == RXDONE_SIGNAL_PLCP) &&
348 (rate->plcp == signal)) ||
349 ((type == RXDONE_SIGNAL_BITRATE) &&
350 (rate->bitrate == signal)) ||
351 ((type == RXDONE_SIGNAL_MCS) &&
352 (rate->mcs == signal))) {
357 WARNING(rt2x00dev, "Frame received with unrecognized signal, "
358 "signal=0x%.4x, type=%d.\n", signal, type);
362 void rt2x00lib_rxdone(struct rt2x00_dev *rt2x00dev,
363 struct queue_entry *entry)
365 struct rxdone_entry_desc rxdesc;
367 struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
368 unsigned int header_length;
371 * Allocate a new sk_buffer. If no new buffer available, drop the
372 * received frame and reuse the existing buffer.
374 skb = rt2x00queue_alloc_rxskb(rt2x00dev, entry);
381 rt2x00queue_unmap_skb(rt2x00dev, entry->skb);
384 * Extract the RXD details.
386 memset(&rxdesc, 0, sizeof(rxdesc));
387 rt2x00dev->ops->lib->fill_rxdone(entry, &rxdesc);
390 * The data behind the ieee80211 header must be
391 * aligned on a 4 byte boundary.
393 header_length = ieee80211_get_hdrlen_from_skb(entry->skb);
396 * Hardware might have stripped the IV/EIV/ICV data,
397 * in that case it is possible that the data was
398 * provided separately (through hardware descriptor)
399 * in which case we should reinsert the data into the frame.
401 if ((rxdesc.dev_flags & RXDONE_CRYPTO_IV) &&
402 (rxdesc.flags & RX_FLAG_IV_STRIPPED))
403 rt2x00crypto_rx_insert_iv(entry->skb, header_length,
405 else if (header_length &&
406 (rxdesc.size > header_length) &&
407 (rxdesc.dev_flags & RXDONE_L2PAD))
408 rt2x00queue_remove_l2pad(entry->skb, header_length);
410 rt2x00queue_align_payload(entry->skb, header_length);
412 /* Trim buffer to correct size */
413 skb_trim(entry->skb, rxdesc.size);
416 * Check if the frame was received using HT. In that case,
417 * the rate is the MCS index and should be passed to mac80211
418 * directly. Otherwise we need to translate the signal to
419 * the correct bitrate index.
421 if (rxdesc.rate_mode == RATE_MODE_CCK ||
422 rxdesc.rate_mode == RATE_MODE_OFDM) {
423 rate_idx = rt2x00lib_rxdone_read_signal(rt2x00dev, &rxdesc);
425 rxdesc.flags |= RX_FLAG_HT;
426 rate_idx = rxdesc.signal;
430 * Update extra components
432 rt2x00link_update_stats(rt2x00dev, entry->skb, &rxdesc);
433 rt2x00debug_update_crypto(rt2x00dev, &rxdesc);
435 rx_status->mactime = rxdesc.timestamp;
436 rx_status->rate_idx = rate_idx;
437 rx_status->signal = rxdesc.rssi;
438 rx_status->flag = rxdesc.flags;
439 rx_status->antenna = rt2x00dev->link.ant.active.rx;
442 * Send frame to mac80211 & debugfs.
443 * mac80211 will clean up the skb structure.
445 rt2x00debug_dump_frame(rt2x00dev, DUMP_FRAME_RXDONE, entry->skb);
446 memcpy(IEEE80211_SKB_RXCB(entry->skb), rx_status, sizeof(*rx_status));
447 ieee80211_rx_irqsafe(rt2x00dev->hw, entry->skb);
450 * Replace the skb with the freshly allocated one.
455 rt2x00dev->ops->lib->clear_entry(entry);
457 rt2x00queue_index_inc(entry->queue, Q_INDEX);
459 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
462 * Driver initialization handlers.
464 const struct rt2x00_rate rt2x00_supported_rates[12] = {
466 .flags = DEV_RATE_CCK,
470 .mcs = RATE_MCS(RATE_MODE_CCK, 0),
473 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE,
477 .mcs = RATE_MCS(RATE_MODE_CCK, 1),
480 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE,
484 .mcs = RATE_MCS(RATE_MODE_CCK, 2),
487 .flags = DEV_RATE_CCK | DEV_RATE_SHORT_PREAMBLE,
491 .mcs = RATE_MCS(RATE_MODE_CCK, 3),
494 .flags = DEV_RATE_OFDM,
498 .mcs = RATE_MCS(RATE_MODE_OFDM, 0),
501 .flags = DEV_RATE_OFDM,
505 .mcs = RATE_MCS(RATE_MODE_OFDM, 1),
508 .flags = DEV_RATE_OFDM,
512 .mcs = RATE_MCS(RATE_MODE_OFDM, 2),
515 .flags = DEV_RATE_OFDM,
519 .mcs = RATE_MCS(RATE_MODE_OFDM, 3),
522 .flags = DEV_RATE_OFDM,
526 .mcs = RATE_MCS(RATE_MODE_OFDM, 4),
529 .flags = DEV_RATE_OFDM,
533 .mcs = RATE_MCS(RATE_MODE_OFDM, 5),
536 .flags = DEV_RATE_OFDM,
540 .mcs = RATE_MCS(RATE_MODE_OFDM, 6),
543 .flags = DEV_RATE_OFDM,
547 .mcs = RATE_MCS(RATE_MODE_OFDM, 7),
551 static void rt2x00lib_channel(struct ieee80211_channel *entry,
552 const int channel, const int tx_power,
555 entry->center_freq = ieee80211_channel_to_frequency(channel);
556 entry->hw_value = value;
557 entry->max_power = tx_power;
558 entry->max_antenna_gain = 0xff;
561 static void rt2x00lib_rate(struct ieee80211_rate *entry,
562 const u16 index, const struct rt2x00_rate *rate)
565 entry->bitrate = rate->bitrate;
566 entry->hw_value =index;
567 entry->hw_value_short = index;
569 if (rate->flags & DEV_RATE_SHORT_PREAMBLE)
570 entry->flags |= IEEE80211_RATE_SHORT_PREAMBLE;
573 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev,
574 struct hw_mode_spec *spec)
576 struct ieee80211_hw *hw = rt2x00dev->hw;
577 struct ieee80211_channel *channels;
578 struct ieee80211_rate *rates;
579 unsigned int num_rates;
583 if (spec->supported_rates & SUPPORT_RATE_CCK)
585 if (spec->supported_rates & SUPPORT_RATE_OFDM)
588 channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL);
592 rates = kzalloc(sizeof(*rates) * num_rates, GFP_KERNEL);
594 goto exit_free_channels;
597 * Initialize Rate list.
599 for (i = 0; i < num_rates; i++)
600 rt2x00lib_rate(&rates[i], i, rt2x00_get_rate(i));
603 * Initialize Channel list.
605 for (i = 0; i < spec->num_channels; i++) {
606 rt2x00lib_channel(&channels[i],
607 spec->channels[i].channel,
608 spec->channels_info[i].tx_power1, i);
612 * Intitialize 802.11b, 802.11g
616 if (spec->supported_bands & SUPPORT_BAND_2GHZ) {
617 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_channels = 14;
618 rt2x00dev->bands[IEEE80211_BAND_2GHZ].n_bitrates = num_rates;
619 rt2x00dev->bands[IEEE80211_BAND_2GHZ].channels = channels;
620 rt2x00dev->bands[IEEE80211_BAND_2GHZ].bitrates = rates;
621 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
622 &rt2x00dev->bands[IEEE80211_BAND_2GHZ];
623 memcpy(&rt2x00dev->bands[IEEE80211_BAND_2GHZ].ht_cap,
624 &spec->ht, sizeof(spec->ht));
628 * Intitialize 802.11a
630 * Channels: OFDM, UNII, HiperLAN2.
632 if (spec->supported_bands & SUPPORT_BAND_5GHZ) {
633 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_channels =
634 spec->num_channels - 14;
635 rt2x00dev->bands[IEEE80211_BAND_5GHZ].n_bitrates =
637 rt2x00dev->bands[IEEE80211_BAND_5GHZ].channels = &channels[14];
638 rt2x00dev->bands[IEEE80211_BAND_5GHZ].bitrates = &rates[4];
639 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
640 &rt2x00dev->bands[IEEE80211_BAND_5GHZ];
641 memcpy(&rt2x00dev->bands[IEEE80211_BAND_5GHZ].ht_cap,
642 &spec->ht, sizeof(spec->ht));
649 ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n");
653 static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev)
655 if (test_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags))
656 ieee80211_unregister_hw(rt2x00dev->hw);
658 if (likely(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ])) {
659 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->channels);
660 kfree(rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ]->bitrates);
661 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_2GHZ] = NULL;
662 rt2x00dev->hw->wiphy->bands[IEEE80211_BAND_5GHZ] = NULL;
665 kfree(rt2x00dev->spec.channels_info);
668 static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev)
670 struct hw_mode_spec *spec = &rt2x00dev->spec;
673 if (test_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags))
677 * Initialize HW modes.
679 status = rt2x00lib_probe_hw_modes(rt2x00dev, spec);
684 * Initialize HW fields.
686 rt2x00dev->hw->queues = rt2x00dev->ops->tx_queues;
689 * Initialize extra TX headroom required.
691 rt2x00dev->hw->extra_tx_headroom =
692 max_t(unsigned int, IEEE80211_TX_STATUS_HEADROOM,
693 rt2x00dev->ops->extra_tx_headroom);
696 * Take TX headroom required for alignment into account.
698 if (test_bit(DRIVER_REQUIRE_L2PAD, &rt2x00dev->flags))
699 rt2x00dev->hw->extra_tx_headroom += RT2X00_L2PAD_SIZE;
700 else if (test_bit(DRIVER_REQUIRE_DMA, &rt2x00dev->flags))
701 rt2x00dev->hw->extra_tx_headroom += RT2X00_ALIGN_SIZE;
706 status = ieee80211_register_hw(rt2x00dev->hw);
710 set_bit(DEVICE_STATE_REGISTERED_HW, &rt2x00dev->flags);
716 * Initialization/uninitialization handlers.
718 static void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
720 if (!test_and_clear_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags))
724 * Unregister extra components.
726 rt2x00rfkill_unregister(rt2x00dev);
729 * Allow the HW to uninitialize.
731 rt2x00dev->ops->lib->uninitialize(rt2x00dev);
734 * Free allocated queue entries.
736 rt2x00queue_uninitialize(rt2x00dev);
739 static int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)
743 if (test_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags))
747 * Allocate all queue entries.
749 status = rt2x00queue_initialize(rt2x00dev);
754 * Initialize the device.
756 status = rt2x00dev->ops->lib->initialize(rt2x00dev);
758 rt2x00queue_uninitialize(rt2x00dev);
762 set_bit(DEVICE_STATE_INITIALIZED, &rt2x00dev->flags);
765 * Register the extra components.
767 rt2x00rfkill_register(rt2x00dev);
772 int rt2x00lib_start(struct rt2x00_dev *rt2x00dev)
776 if (test_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))
780 * If this is the first interface which is added,
781 * we should load the firmware now.
783 retval = rt2x00lib_load_firmware(rt2x00dev);
788 * Initialize the device.
790 retval = rt2x00lib_initialize(rt2x00dev);
794 rt2x00dev->intf_ap_count = 0;
795 rt2x00dev->intf_sta_count = 0;
796 rt2x00dev->intf_associated = 0;
798 /* Enable the radio */
799 retval = rt2x00lib_enable_radio(rt2x00dev);
801 rt2x00queue_uninitialize(rt2x00dev);
805 set_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags);
810 void rt2x00lib_stop(struct rt2x00_dev *rt2x00dev)
812 if (!test_and_clear_bit(DEVICE_STATE_STARTED, &rt2x00dev->flags))
816 * Perhaps we can add something smarter here,
817 * but for now just disabling the radio should do.
819 rt2x00lib_disable_radio(rt2x00dev);
821 rt2x00dev->intf_ap_count = 0;
822 rt2x00dev->intf_sta_count = 0;
823 rt2x00dev->intf_associated = 0;
827 * driver allocation handlers.
829 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
831 int retval = -ENOMEM;
833 mutex_init(&rt2x00dev->csr_mutex);
835 set_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
838 * Make room for rt2x00_intf inside the per-interface
839 * structure ieee80211_vif.
841 rt2x00dev->hw->vif_data_size = sizeof(struct rt2x00_intf);
844 * Determine which operating modes are supported, all modes
845 * which require beaconing, depend on the availability of
848 rt2x00dev->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
849 if (rt2x00dev->ops->bcn->entry_num > 0)
850 rt2x00dev->hw->wiphy->interface_modes |=
851 BIT(NL80211_IFTYPE_ADHOC) |
852 BIT(NL80211_IFTYPE_AP) |
853 BIT(NL80211_IFTYPE_MESH_POINT) |
854 BIT(NL80211_IFTYPE_WDS);
857 * Initialize configuration work.
859 INIT_WORK(&rt2x00dev->intf_work, rt2x00lib_intf_scheduled);
862 * Let the driver probe the device to detect the capabilities.
864 retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev);
866 ERROR(rt2x00dev, "Failed to allocate device.\n");
871 * Allocate queue array.
873 retval = rt2x00queue_allocate(rt2x00dev);
878 * Initialize ieee80211 structure.
880 retval = rt2x00lib_probe_hw(rt2x00dev);
882 ERROR(rt2x00dev, "Failed to initialize hw.\n");
887 * Register extra components.
889 rt2x00link_register(rt2x00dev);
890 rt2x00leds_register(rt2x00dev);
891 rt2x00debug_register(rt2x00dev);
896 rt2x00lib_remove_dev(rt2x00dev);
900 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev);
902 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
904 clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
909 rt2x00lib_disable_radio(rt2x00dev);
914 cancel_work_sync(&rt2x00dev->intf_work);
917 * Uninitialize device.
919 rt2x00lib_uninitialize(rt2x00dev);
922 * Free extra components
924 rt2x00debug_deregister(rt2x00dev);
925 rt2x00leds_unregister(rt2x00dev);
928 * Free ieee80211_hw memory.
930 rt2x00lib_remove_hw(rt2x00dev);
933 * Free firmware image.
935 rt2x00lib_free_firmware(rt2x00dev);
938 * Free queue structures.
940 rt2x00queue_free(rt2x00dev);
942 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev);
945 * Device state handlers
948 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state)
950 NOTICE(rt2x00dev, "Going to sleep.\n");
953 * Prevent mac80211 from accessing driver while suspended.
955 if (!test_and_clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
959 * Cleanup as much as possible.
961 rt2x00lib_uninitialize(rt2x00dev);
964 * Suspend/disable extra components.
966 rt2x00leds_suspend(rt2x00dev);
967 rt2x00debug_deregister(rt2x00dev);
970 * Set device mode to sleep for power management,
971 * on some hardware this call seems to consistently fail.
972 * From the specifications it is hard to tell why it fails,
973 * and if this is a "bad thing".
974 * Overall it is safe to just ignore the failure and
975 * continue suspending. The only downside is that the
976 * device will not be in optimal power save mode, but with
977 * the radio and the other components already disabled the
978 * device is as good as disabled.
980 if (rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP))
981 WARNING(rt2x00dev, "Device failed to enter sleep state, "
982 "continue suspending.\n");
986 EXPORT_SYMBOL_GPL(rt2x00lib_suspend);
988 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
990 NOTICE(rt2x00dev, "Waking up.\n");
993 * Restore/enable extra components.
995 rt2x00debug_register(rt2x00dev);
996 rt2x00leds_resume(rt2x00dev);
999 * We are ready again to receive requests from mac80211.
1001 set_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
1005 EXPORT_SYMBOL_GPL(rt2x00lib_resume);
1006 #endif /* CONFIG_PM */
1009 * rt2x00lib module information.
1011 MODULE_AUTHOR(DRV_PROJECT);
1012 MODULE_VERSION(DRV_VERSION);
1013 MODULE_DESCRIPTION("rt2x00 library");
1014 MODULE_LICENSE("GPL");