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");