2 Copyright (C) 2004 - 2007 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.
27 * Set enviroment defines for rt2x00.h
29 #define DRV_NAME "rt2x00lib"
31 #include <linux/kernel.h>
32 #include <linux/module.h>
35 #include "rt2x00lib.h"
40 struct data_ring *rt2x00lib_get_ring(struct rt2x00_dev *rt2x00dev,
41 const unsigned int queue)
43 int beacon = test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags);
46 * Check if we are requesting a reqular TX ring,
47 * or if we are requesting a Beacon or Atim ring.
48 * For Atim rings, we should check if it is supported.
50 if (queue < rt2x00dev->hw->queues && rt2x00dev->tx)
51 return &rt2x00dev->tx[queue];
53 if (!rt2x00dev->bcn || !beacon)
56 if (queue == IEEE80211_TX_QUEUE_BEACON)
57 return &rt2x00dev->bcn[0];
58 else if (queue == IEEE80211_TX_QUEUE_AFTER_BEACON)
59 return &rt2x00dev->bcn[1];
63 EXPORT_SYMBOL_GPL(rt2x00lib_get_ring);
66 * Link tuning handlers
68 static void rt2x00lib_start_link_tuner(struct rt2x00_dev *rt2x00dev)
70 rt2x00_clear_link(&rt2x00dev->link);
73 * Reset the link tuner.
75 rt2x00dev->ops->lib->reset_tuner(rt2x00dev);
77 queue_delayed_work(rt2x00dev->hw->workqueue,
78 &rt2x00dev->link.work, LINK_TUNE_INTERVAL);
81 static void rt2x00lib_stop_link_tuner(struct rt2x00_dev *rt2x00dev)
83 cancel_delayed_work_sync(&rt2x00dev->link.work);
86 void rt2x00lib_reset_link_tuner(struct rt2x00_dev *rt2x00dev)
88 if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
91 rt2x00lib_stop_link_tuner(rt2x00dev);
92 rt2x00lib_start_link_tuner(rt2x00dev);
96 * Radio control handlers.
98 int rt2x00lib_enable_radio(struct rt2x00_dev *rt2x00dev)
103 * Don't enable the radio twice.
104 * And check if the hardware button has been disabled.
106 if (test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags) ||
107 test_bit(DEVICE_DISABLED_RADIO_HW, &rt2x00dev->flags))
113 status = rt2x00dev->ops->lib->set_device_state(rt2x00dev,
118 __set_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags);
123 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_ON);
126 * Start the TX queues.
128 ieee80211_start_queues(rt2x00dev->hw);
133 void rt2x00lib_disable_radio(struct rt2x00_dev *rt2x00dev)
135 if (!__test_and_clear_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
139 * Stop all scheduled work.
141 if (work_pending(&rt2x00dev->beacon_work))
142 cancel_work_sync(&rt2x00dev->beacon_work);
143 if (work_pending(&rt2x00dev->filter_work))
144 cancel_work_sync(&rt2x00dev->filter_work);
145 if (work_pending(&rt2x00dev->config_work))
146 cancel_work_sync(&rt2x00dev->config_work);
149 * Stop the TX queues.
151 ieee80211_stop_queues(rt2x00dev->hw);
156 rt2x00lib_toggle_rx(rt2x00dev, STATE_RADIO_RX_OFF);
161 rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_RADIO_OFF);
164 void rt2x00lib_toggle_rx(struct rt2x00_dev *rt2x00dev, enum dev_state state)
167 * When we are disabling the RX, we should also stop the link tuner.
169 if (state == STATE_RADIO_RX_OFF)
170 rt2x00lib_stop_link_tuner(rt2x00dev);
172 rt2x00dev->ops->lib->set_device_state(rt2x00dev, state);
175 * When we are enabling the RX, we should also start the link tuner.
177 if (state == STATE_RADIO_RX_ON &&
178 is_interface_present(&rt2x00dev->interface))
179 rt2x00lib_start_link_tuner(rt2x00dev);
182 static void rt2x00lib_precalculate_link_signal(struct link_qual *qual)
184 if (qual->rx_failed || qual->rx_success)
185 qual->rx_percentage =
186 (qual->rx_success * 100) /
187 (qual->rx_failed + qual->rx_success);
189 qual->rx_percentage = 50;
191 if (qual->tx_failed || qual->tx_success)
192 qual->tx_percentage =
193 (qual->tx_success * 100) /
194 (qual->tx_failed + qual->tx_success);
196 qual->tx_percentage = 50;
198 qual->rx_success = 0;
200 qual->tx_success = 0;
204 static int rt2x00lib_calculate_link_signal(struct rt2x00_dev *rt2x00dev,
207 int rssi_percentage = 0;
211 * We need a positive value for the RSSI.
214 rssi += rt2x00dev->rssi_offset;
217 * Calculate the different percentages,
218 * which will be used for the signal.
220 if (rt2x00dev->rssi_offset)
221 rssi_percentage = (rssi * 100) / rt2x00dev->rssi_offset;
224 * Add the individual percentages and use the WEIGHT
225 * defines to calculate the current link signal.
227 signal = ((WEIGHT_RSSI * rssi_percentage) +
228 (WEIGHT_TX * rt2x00dev->link.qual.tx_percentage) +
229 (WEIGHT_RX * rt2x00dev->link.qual.rx_percentage)) / 100;
231 return (signal > 100) ? 100 : signal;
234 static void rt2x00lib_link_tuner(struct work_struct *work)
236 struct rt2x00_dev *rt2x00dev =
237 container_of(work, struct rt2x00_dev, link.work.work);
240 * When the radio is shutting down we should
241 * immediately cease all link tuning.
243 if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
249 rt2x00dev->ops->lib->link_stats(rt2x00dev, &rt2x00dev->link.qual);
251 rt2x00dev->low_level_stats.dot11FCSErrorCount +=
252 rt2x00dev->link.qual.rx_failed;
255 * Only perform the link tuning when Link tuning
256 * has been enabled (This could have been disabled from the EEPROM).
258 if (!test_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags))
259 rt2x00dev->ops->lib->link_tuner(rt2x00dev);
262 * Precalculate a portion of the link signal which is
263 * in based on the tx/rx success/failure counters.
265 rt2x00lib_precalculate_link_signal(&rt2x00dev->link.qual);
268 * Increase tuner counter, and reschedule the next link tuner run.
270 rt2x00dev->link.count++;
271 queue_delayed_work(rt2x00dev->hw->workqueue, &rt2x00dev->link.work,
275 static void rt2x00lib_packetfilter_scheduled(struct work_struct *work)
277 struct rt2x00_dev *rt2x00dev =
278 container_of(work, struct rt2x00_dev, filter_work);
279 unsigned int filter = rt2x00dev->interface.filter;
282 * Since we had stored the filter inside interface.filter,
283 * we should now clear that field. Otherwise the driver will
284 * assume nothing has changed (*total_flags will be compared
285 * to interface.filter to determine if any action is required).
287 rt2x00dev->interface.filter = 0;
289 rt2x00dev->ops->hw->configure_filter(rt2x00dev->hw,
290 filter, &filter, 0, NULL);
293 static void rt2x00lib_configuration_scheduled(struct work_struct *work)
295 struct rt2x00_dev *rt2x00dev =
296 container_of(work, struct rt2x00_dev, config_work);
297 int preamble = !test_bit(CONFIG_SHORT_PREAMBLE, &rt2x00dev->flags);
299 rt2x00mac_erp_ie_changed(rt2x00dev->hw,
300 IEEE80211_ERP_CHANGE_PREAMBLE, 0, preamble);
304 * Interrupt context handlers.
306 static void rt2x00lib_beacondone_scheduled(struct work_struct *work)
308 struct rt2x00_dev *rt2x00dev =
309 container_of(work, struct rt2x00_dev, beacon_work);
310 struct data_ring *ring =
311 rt2x00lib_get_ring(rt2x00dev, IEEE80211_TX_QUEUE_BEACON);
312 struct data_entry *entry = rt2x00_get_data_entry(ring);
315 skb = ieee80211_beacon_get(rt2x00dev->hw,
316 rt2x00dev->interface.id,
317 &entry->tx_status.control);
321 rt2x00dev->ops->hw->beacon_update(rt2x00dev->hw, skb,
322 &entry->tx_status.control);
327 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev)
329 if (!test_bit(DEVICE_ENABLED_RADIO, &rt2x00dev->flags))
332 queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->beacon_work);
334 EXPORT_SYMBOL_GPL(rt2x00lib_beacondone);
336 void rt2x00lib_txdone(struct data_entry *entry,
337 const int status, const int retry)
339 struct rt2x00_dev *rt2x00dev = entry->ring->rt2x00dev;
340 struct ieee80211_tx_status *tx_status = &entry->tx_status;
341 struct ieee80211_low_level_stats *stats = &rt2x00dev->low_level_stats;
342 int success = !!(status == TX_SUCCESS || status == TX_SUCCESS_RETRY);
343 int fail = !!(status == TX_FAIL_RETRY || status == TX_FAIL_INVALID ||
344 status == TX_FAIL_OTHER);
347 * Update TX statistics.
349 tx_status->flags = 0;
350 tx_status->ack_signal = 0;
351 tx_status->excessive_retries = (status == TX_FAIL_RETRY);
352 tx_status->retry_count = retry;
353 rt2x00dev->link.qual.tx_success += success;
354 rt2x00dev->link.qual.tx_failed += retry + fail;
356 if (!(tx_status->control.flags & IEEE80211_TXCTL_NO_ACK)) {
358 tx_status->flags |= IEEE80211_TX_STATUS_ACK;
360 stats->dot11ACKFailureCount++;
363 tx_status->queue_length = entry->ring->stats.limit;
364 tx_status->queue_number = tx_status->control.queue;
366 if (tx_status->control.flags & IEEE80211_TXCTL_USE_RTS_CTS) {
368 stats->dot11RTSSuccessCount++;
370 stats->dot11RTSFailureCount++;
374 * Send the tx_status to mac80211,
375 * that method also cleans up the skb structure.
377 ieee80211_tx_status_irqsafe(rt2x00dev->hw, entry->skb, tx_status);
380 EXPORT_SYMBOL_GPL(rt2x00lib_txdone);
382 void rt2x00lib_rxdone(struct data_entry *entry, struct sk_buff *skb,
383 struct rxdata_entry_desc *desc)
385 struct rt2x00_dev *rt2x00dev = entry->ring->rt2x00dev;
386 struct ieee80211_rx_status *rx_status = &rt2x00dev->rx_status;
387 struct ieee80211_hw_mode *mode;
388 struct ieee80211_rate *rate;
393 * Update RX statistics.
395 mode = &rt2x00dev->hwmodes[rt2x00dev->curr_hwmode];
396 for (i = 0; i < mode->num_rates; i++) {
397 rate = &mode->rates[i];
400 * When frame was received with an OFDM bitrate,
401 * the signal is the PLCP value. If it was received with
402 * a CCK bitrate the signal is the rate in 0.5kbit/s.
405 val = DEVICE_GET_RATE_FIELD(rate->val, RATE);
407 val = DEVICE_GET_RATE_FIELD(rate->val, PLCP);
409 if (val == desc->signal) {
415 rt2x00_update_link_rssi(&rt2x00dev->link, desc->rssi);
416 rt2x00dev->link.qual.rx_success++;
417 rx_status->rate = val;
419 rt2x00lib_calculate_link_signal(rt2x00dev, desc->rssi);
420 rx_status->ssi = desc->rssi;
421 rx_status->flag = desc->flags;
422 rx_status->antenna = rt2x00dev->link.active_ant.rx;
425 * Send frame to mac80211
427 ieee80211_rx_irqsafe(rt2x00dev->hw, skb, rx_status);
429 EXPORT_SYMBOL_GPL(rt2x00lib_rxdone);
432 * TX descriptor initializer
434 void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev,
435 struct data_desc *txd,
436 struct ieee80211_hdr *ieee80211hdr,
438 struct ieee80211_tx_control *control)
440 struct txdata_entry_desc desc;
441 struct data_ring *ring;
450 * Make sure the descriptor is properly cleared.
452 memset(&desc, 0x00, sizeof(desc));
455 * Get ring pointer, if we fail to obtain the
456 * correct ring, then use the first TX ring.
458 ring = rt2x00lib_get_ring(rt2x00dev, control->queue);
460 ring = rt2x00lib_get_ring(rt2x00dev, IEEE80211_TX_QUEUE_DATA0);
462 desc.cw_min = ring->tx_params.cw_min;
463 desc.cw_max = ring->tx_params.cw_max;
464 desc.aifs = ring->tx_params.aifs;
469 if (control->queue < rt2x00dev->hw->queues)
470 desc.queue = control->queue;
471 else if (control->queue == IEEE80211_TX_QUEUE_BEACON ||
472 control->queue == IEEE80211_TX_QUEUE_AFTER_BEACON)
473 desc.queue = QUEUE_MGMT;
475 desc.queue = QUEUE_OTHER;
478 * Read required fields from ieee80211 header.
480 frame_control = le16_to_cpu(ieee80211hdr->frame_control);
481 seq_ctrl = le16_to_cpu(ieee80211hdr->seq_ctrl);
483 tx_rate = control->tx_rate;
486 * Check if this is a RTS/CTS frame
488 if (is_rts_frame(frame_control) || is_cts_frame(frame_control)) {
489 __set_bit(ENTRY_TXD_BURST, &desc.flags);
490 if (is_rts_frame(frame_control))
491 __set_bit(ENTRY_TXD_RTS_FRAME, &desc.flags);
492 if (control->rts_cts_rate)
493 tx_rate = control->rts_cts_rate;
499 if (DEVICE_GET_RATE_FIELD(tx_rate, RATEMASK) & DEV_OFDM_RATEMASK)
500 __set_bit(ENTRY_TXD_OFDM_RATE, &desc.flags);
503 * Check if more fragments are pending
505 if (ieee80211_get_morefrag(ieee80211hdr)) {
506 __set_bit(ENTRY_TXD_BURST, &desc.flags);
507 __set_bit(ENTRY_TXD_MORE_FRAG, &desc.flags);
511 * Beacons and probe responses require the tsf timestamp
512 * to be inserted into the frame.
514 if (control->queue == IEEE80211_TX_QUEUE_BEACON ||
515 is_probe_resp(frame_control))
516 __set_bit(ENTRY_TXD_REQ_TIMESTAMP, &desc.flags);
519 * Determine with what IFS priority this frame should be send.
520 * Set ifs to IFS_SIFS when the this is not the first fragment,
521 * or this fragment came after RTS/CTS.
523 if ((seq_ctrl & IEEE80211_SCTL_FRAG) > 0 ||
524 test_bit(ENTRY_TXD_RTS_FRAME, &desc.flags))
527 desc.ifs = IFS_BACKOFF;
531 * Length calculation depends on OFDM/CCK rate.
533 desc.signal = DEVICE_GET_RATE_FIELD(tx_rate, PLCP);
536 if (test_bit(ENTRY_TXD_OFDM_RATE, &desc.flags)) {
537 desc.length_high = ((length + FCS_LEN) >> 6) & 0x3f;
538 desc.length_low = ((length + FCS_LEN) & 0x3f);
540 bitrate = DEVICE_GET_RATE_FIELD(tx_rate, RATE);
543 * Convert length to microseconds.
545 residual = get_duration_res(length + FCS_LEN, bitrate);
546 duration = get_duration(length + FCS_LEN, bitrate);
552 * Check if we need to set the Length Extension
554 if (bitrate == 110 && residual <= 30)
555 desc.service |= 0x80;
558 desc.length_high = (duration >> 8) & 0xff;
559 desc.length_low = duration & 0xff;
562 * When preamble is enabled we should set the
563 * preamble bit for the signal.
565 if (DEVICE_GET_RATE_FIELD(tx_rate, PREAMBLE))
569 rt2x00dev->ops->lib->write_tx_desc(rt2x00dev, txd, &desc,
570 ieee80211hdr, length, control);
572 EXPORT_SYMBOL_GPL(rt2x00lib_write_tx_desc);
575 * Driver initialization handlers.
577 static void rt2x00lib_channel(struct ieee80211_channel *entry,
578 const int channel, const int tx_power,
581 entry->chan = channel;
583 entry->freq = 2407 + (5 * channel);
585 entry->freq = 5000 + (5 * channel);
588 IEEE80211_CHAN_W_IBSS |
589 IEEE80211_CHAN_W_ACTIVE_SCAN |
590 IEEE80211_CHAN_W_SCAN;
591 entry->power_level = tx_power;
592 entry->antenna_max = 0xff;
595 static void rt2x00lib_rate(struct ieee80211_rate *entry,
596 const int rate, const int mask,
597 const int plcp, const int flags)
601 DEVICE_SET_RATE_FIELD(rate, RATE) |
602 DEVICE_SET_RATE_FIELD(mask, RATEMASK) |
603 DEVICE_SET_RATE_FIELD(plcp, PLCP);
604 entry->flags = flags;
605 entry->val2 = entry->val;
606 if (entry->flags & IEEE80211_RATE_PREAMBLE2)
607 entry->val2 |= DEVICE_SET_RATE_FIELD(1, PREAMBLE);
608 entry->min_rssi_ack = 0;
609 entry->min_rssi_ack_delta = 0;
612 static int rt2x00lib_probe_hw_modes(struct rt2x00_dev *rt2x00dev,
613 struct hw_mode_spec *spec)
615 struct ieee80211_hw *hw = rt2x00dev->hw;
616 struct ieee80211_hw_mode *hwmodes;
617 struct ieee80211_channel *channels;
618 struct ieee80211_rate *rates;
620 unsigned char tx_power;
622 hwmodes = kzalloc(sizeof(*hwmodes) * spec->num_modes, GFP_KERNEL);
626 channels = kzalloc(sizeof(*channels) * spec->num_channels, GFP_KERNEL);
628 goto exit_free_modes;
630 rates = kzalloc(sizeof(*rates) * spec->num_rates, GFP_KERNEL);
632 goto exit_free_channels;
635 * Initialize Rate list.
637 rt2x00lib_rate(&rates[0], 10, DEV_RATEMASK_1MB,
638 0x00, IEEE80211_RATE_CCK);
639 rt2x00lib_rate(&rates[1], 20, DEV_RATEMASK_2MB,
640 0x01, IEEE80211_RATE_CCK_2);
641 rt2x00lib_rate(&rates[2], 55, DEV_RATEMASK_5_5MB,
642 0x02, IEEE80211_RATE_CCK_2);
643 rt2x00lib_rate(&rates[3], 110, DEV_RATEMASK_11MB,
644 0x03, IEEE80211_RATE_CCK_2);
646 if (spec->num_rates > 4) {
647 rt2x00lib_rate(&rates[4], 60, DEV_RATEMASK_6MB,
648 0x0b, IEEE80211_RATE_OFDM);
649 rt2x00lib_rate(&rates[5], 90, DEV_RATEMASK_9MB,
650 0x0f, IEEE80211_RATE_OFDM);
651 rt2x00lib_rate(&rates[6], 120, DEV_RATEMASK_12MB,
652 0x0a, IEEE80211_RATE_OFDM);
653 rt2x00lib_rate(&rates[7], 180, DEV_RATEMASK_18MB,
654 0x0e, IEEE80211_RATE_OFDM);
655 rt2x00lib_rate(&rates[8], 240, DEV_RATEMASK_24MB,
656 0x09, IEEE80211_RATE_OFDM);
657 rt2x00lib_rate(&rates[9], 360, DEV_RATEMASK_36MB,
658 0x0d, IEEE80211_RATE_OFDM);
659 rt2x00lib_rate(&rates[10], 480, DEV_RATEMASK_48MB,
660 0x08, IEEE80211_RATE_OFDM);
661 rt2x00lib_rate(&rates[11], 540, DEV_RATEMASK_54MB,
662 0x0c, IEEE80211_RATE_OFDM);
666 * Initialize Channel list.
668 for (i = 0; i < spec->num_channels; i++) {
669 if (spec->channels[i].channel <= 14)
670 tx_power = spec->tx_power_bg[i];
671 else if (spec->tx_power_a)
672 tx_power = spec->tx_power_a[i];
674 tx_power = spec->tx_power_default;
676 rt2x00lib_channel(&channels[i],
677 spec->channels[i].channel, tx_power, i);
681 * Intitialize 802.11b
685 if (spec->num_modes > HWMODE_B) {
686 hwmodes[HWMODE_B].mode = MODE_IEEE80211B;
687 hwmodes[HWMODE_B].num_channels = 14;
688 hwmodes[HWMODE_B].num_rates = 4;
689 hwmodes[HWMODE_B].channels = channels;
690 hwmodes[HWMODE_B].rates = rates;
694 * Intitialize 802.11g
698 if (spec->num_modes > HWMODE_G) {
699 hwmodes[HWMODE_G].mode = MODE_IEEE80211G;
700 hwmodes[HWMODE_G].num_channels = 14;
701 hwmodes[HWMODE_G].num_rates = spec->num_rates;
702 hwmodes[HWMODE_G].channels = channels;
703 hwmodes[HWMODE_G].rates = rates;
707 * Intitialize 802.11a
709 * Channels: OFDM, UNII, HiperLAN2.
711 if (spec->num_modes > HWMODE_A) {
712 hwmodes[HWMODE_A].mode = MODE_IEEE80211A;
713 hwmodes[HWMODE_A].num_channels = spec->num_channels - 14;
714 hwmodes[HWMODE_A].num_rates = spec->num_rates - 4;
715 hwmodes[HWMODE_A].channels = &channels[14];
716 hwmodes[HWMODE_A].rates = &rates[4];
719 if (spec->num_modes > HWMODE_G &&
720 ieee80211_register_hwmode(hw, &hwmodes[HWMODE_G]))
721 goto exit_free_rates;
723 if (spec->num_modes > HWMODE_B &&
724 ieee80211_register_hwmode(hw, &hwmodes[HWMODE_B]))
725 goto exit_free_rates;
727 if (spec->num_modes > HWMODE_A &&
728 ieee80211_register_hwmode(hw, &hwmodes[HWMODE_A]))
729 goto exit_free_rates;
731 rt2x00dev->hwmodes = hwmodes;
745 ERROR(rt2x00dev, "Allocation ieee80211 modes failed.\n");
749 static void rt2x00lib_remove_hw(struct rt2x00_dev *rt2x00dev)
751 if (test_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags))
752 ieee80211_unregister_hw(rt2x00dev->hw);
754 if (likely(rt2x00dev->hwmodes)) {
755 kfree(rt2x00dev->hwmodes->channels);
756 kfree(rt2x00dev->hwmodes->rates);
757 kfree(rt2x00dev->hwmodes);
758 rt2x00dev->hwmodes = NULL;
762 static int rt2x00lib_probe_hw(struct rt2x00_dev *rt2x00dev)
764 struct hw_mode_spec *spec = &rt2x00dev->spec;
768 * Initialize HW modes.
770 status = rt2x00lib_probe_hw_modes(rt2x00dev, spec);
777 status = ieee80211_register_hw(rt2x00dev->hw);
779 rt2x00lib_remove_hw(rt2x00dev);
783 __set_bit(DEVICE_REGISTERED_HW, &rt2x00dev->flags);
789 * Initialization/uninitialization handlers.
791 static int rt2x00lib_alloc_entries(struct data_ring *ring,
792 const u16 max_entries, const u16 data_size,
795 struct data_entry *entry;
798 ring->stats.limit = max_entries;
799 ring->data_size = data_size;
800 ring->desc_size = desc_size;
803 * Allocate all ring entries.
805 entry = kzalloc(ring->stats.limit * sizeof(*entry), GFP_KERNEL);
809 for (i = 0; i < ring->stats.limit; i++) {
811 entry[i].ring = ring;
820 static int rt2x00lib_alloc_ring_entries(struct rt2x00_dev *rt2x00dev)
822 struct data_ring *ring;
825 * Allocate the RX ring.
827 if (rt2x00lib_alloc_entries(rt2x00dev->rx, RX_ENTRIES, DATA_FRAME_SIZE,
828 rt2x00dev->ops->rxd_size))
832 * First allocate the TX rings.
834 txring_for_each(rt2x00dev, ring) {
835 if (rt2x00lib_alloc_entries(ring, TX_ENTRIES, DATA_FRAME_SIZE,
836 rt2x00dev->ops->txd_size))
840 if (!test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags))
844 * Allocate the BEACON ring.
846 if (rt2x00lib_alloc_entries(&rt2x00dev->bcn[0], BEACON_ENTRIES,
847 MGMT_FRAME_SIZE, rt2x00dev->ops->txd_size))
851 * Allocate the Atim ring.
853 if (rt2x00lib_alloc_entries(&rt2x00dev->bcn[1], ATIM_ENTRIES,
854 DATA_FRAME_SIZE, rt2x00dev->ops->txd_size))
860 static void rt2x00lib_free_ring_entries(struct rt2x00_dev *rt2x00dev)
862 struct data_ring *ring;
864 ring_for_each(rt2x00dev, ring) {
870 void rt2x00lib_uninitialize(struct rt2x00_dev *rt2x00dev)
872 if (!__test_and_clear_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
878 rt2x00rfkill_unregister(rt2x00dev);
881 * Allow the HW to uninitialize.
883 rt2x00dev->ops->lib->uninitialize(rt2x00dev);
886 * Free allocated ring entries.
888 rt2x00lib_free_ring_entries(rt2x00dev);
891 int rt2x00lib_initialize(struct rt2x00_dev *rt2x00dev)
895 if (test_bit(DEVICE_INITIALIZED, &rt2x00dev->flags))
899 * Allocate all ring entries.
901 status = rt2x00lib_alloc_ring_entries(rt2x00dev);
903 ERROR(rt2x00dev, "Ring entries allocation failed.\n");
908 * Initialize the device.
910 status = rt2x00dev->ops->lib->initialize(rt2x00dev);
914 __set_bit(DEVICE_INITIALIZED, &rt2x00dev->flags);
917 * Register the rfkill handler.
919 status = rt2x00rfkill_register(rt2x00dev);
921 goto exit_unitialize;
926 rt2x00lib_uninitialize(rt2x00dev);
929 rt2x00lib_free_ring_entries(rt2x00dev);
935 * driver allocation handlers.
937 static int rt2x00lib_alloc_rings(struct rt2x00_dev *rt2x00dev)
939 struct data_ring *ring;
942 * We need the following rings:
945 * Beacon: 1 (if required)
946 * Atim: 1 (if required)
948 rt2x00dev->data_rings = 1 + rt2x00dev->hw->queues +
949 (2 * test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags));
951 ring = kzalloc(rt2x00dev->data_rings * sizeof(*ring), GFP_KERNEL);
953 ERROR(rt2x00dev, "Ring allocation failed.\n");
958 * Initialize pointers
960 rt2x00dev->rx = ring;
961 rt2x00dev->tx = &rt2x00dev->rx[1];
962 if (test_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags))
963 rt2x00dev->bcn = &rt2x00dev->tx[rt2x00dev->hw->queues];
966 * Initialize ring parameters.
968 * cw_max: 2^10 = 1024.
970 ring_for_each(rt2x00dev, ring) {
971 ring->rt2x00dev = rt2x00dev;
972 ring->tx_params.aifs = 2;
973 ring->tx_params.cw_min = 5;
974 ring->tx_params.cw_max = 10;
980 static void rt2x00lib_free_rings(struct rt2x00_dev *rt2x00dev)
982 kfree(rt2x00dev->rx);
983 rt2x00dev->rx = NULL;
984 rt2x00dev->tx = NULL;
985 rt2x00dev->bcn = NULL;
988 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev)
990 int retval = -ENOMEM;
993 * Let the driver probe the device to detect the capabilities.
995 retval = rt2x00dev->ops->lib->probe_hw(rt2x00dev);
997 ERROR(rt2x00dev, "Failed to allocate device.\n");
1002 * Initialize configuration work.
1004 INIT_WORK(&rt2x00dev->beacon_work, rt2x00lib_beacondone_scheduled);
1005 INIT_WORK(&rt2x00dev->filter_work, rt2x00lib_packetfilter_scheduled);
1006 INIT_WORK(&rt2x00dev->config_work, rt2x00lib_configuration_scheduled);
1007 INIT_DELAYED_WORK(&rt2x00dev->link.work, rt2x00lib_link_tuner);
1010 * Reset current working type.
1012 rt2x00dev->interface.type = INVALID_INTERFACE;
1015 * Allocate ring array.
1017 retval = rt2x00lib_alloc_rings(rt2x00dev);
1022 * Initialize ieee80211 structure.
1024 retval = rt2x00lib_probe_hw(rt2x00dev);
1026 ERROR(rt2x00dev, "Failed to initialize hw.\n");
1033 retval = rt2x00rfkill_allocate(rt2x00dev);
1038 * Open the debugfs entry.
1040 rt2x00debug_register(rt2x00dev);
1042 __set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1047 rt2x00lib_remove_dev(rt2x00dev);
1051 EXPORT_SYMBOL_GPL(rt2x00lib_probe_dev);
1053 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev)
1055 __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1060 rt2x00lib_disable_radio(rt2x00dev);
1063 * Uninitialize device.
1065 rt2x00lib_uninitialize(rt2x00dev);
1068 * Close debugfs entry.
1070 rt2x00debug_deregister(rt2x00dev);
1075 rt2x00rfkill_free(rt2x00dev);
1078 * Free ieee80211_hw memory.
1080 rt2x00lib_remove_hw(rt2x00dev);
1083 * Free firmware image.
1085 rt2x00lib_free_firmware(rt2x00dev);
1088 * Free ring structures.
1090 rt2x00lib_free_rings(rt2x00dev);
1092 EXPORT_SYMBOL_GPL(rt2x00lib_remove_dev);
1095 * Device state handlers
1098 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state)
1102 NOTICE(rt2x00dev, "Going to sleep.\n");
1103 __clear_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1106 * Only continue if mac80211 has open interfaces.
1108 if (!test_bit(DEVICE_STARTED, &rt2x00dev->flags))
1110 __set_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags);
1113 * Disable radio and unitialize all items
1114 * that must be recreated on resume.
1116 rt2x00mac_stop(rt2x00dev->hw);
1117 rt2x00lib_uninitialize(rt2x00dev);
1118 rt2x00debug_deregister(rt2x00dev);
1122 * Set device mode to sleep for power management.
1124 retval = rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_SLEEP);
1130 EXPORT_SYMBOL_GPL(rt2x00lib_suspend);
1132 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev)
1134 struct interface *intf = &rt2x00dev->interface;
1137 NOTICE(rt2x00dev, "Waking up.\n");
1138 __set_bit(DEVICE_PRESENT, &rt2x00dev->flags);
1141 * Open the debugfs entry.
1143 rt2x00debug_register(rt2x00dev);
1146 * Only continue if mac80211 had open interfaces.
1148 if (!__test_and_clear_bit(DEVICE_STARTED_SUSPEND, &rt2x00dev->flags))
1152 * Reinitialize device and all active interfaces.
1154 retval = rt2x00mac_start(rt2x00dev->hw);
1159 * Reconfigure device.
1161 rt2x00lib_config(rt2x00dev, &rt2x00dev->hw->conf, 1);
1162 if (!rt2x00dev->hw->conf.radio_enabled)
1163 rt2x00lib_disable_radio(rt2x00dev);
1165 rt2x00lib_config_mac_addr(rt2x00dev, intf->mac);
1166 rt2x00lib_config_bssid(rt2x00dev, intf->bssid);
1167 rt2x00lib_config_type(rt2x00dev, intf->type);
1170 * It is possible that during that mac80211 has attempted
1171 * to send frames while we were suspending or resuming.
1172 * In that case we have disabled the TX queue and should
1173 * now enable it again
1175 ieee80211_start_queues(rt2x00dev->hw);
1178 * When in Master or Ad-hoc mode,
1179 * restart Beacon transmitting by faking a beacondone event.
1181 if (intf->type == IEEE80211_IF_TYPE_AP ||
1182 intf->type == IEEE80211_IF_TYPE_IBSS)
1183 rt2x00lib_beacondone(rt2x00dev);
1188 rt2x00lib_disable_radio(rt2x00dev);
1189 rt2x00lib_uninitialize(rt2x00dev);
1190 rt2x00debug_deregister(rt2x00dev);
1194 EXPORT_SYMBOL_GPL(rt2x00lib_resume);
1195 #endif /* CONFIG_PM */
1198 * rt2x00lib module information.
1200 MODULE_AUTHOR(DRV_PROJECT);
1201 MODULE_VERSION(DRV_VERSION);
1202 MODULE_DESCRIPTION("rt2x00 library");
1203 MODULE_LICENSE("GPL");