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1/*
2 Copyright (C) 2010 Willow Garage <http://www.willowgarage.com>
3 Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com>
4 Copyright (C) 2004 - 2009 Gertjan van Wingerde <gwingerde@gmail.com>
5 <http://rt2x00.serialmonkey.com>
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the
19 Free Software Foundation, Inc.,
20 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 */
22
23/*
24 Module: rt2x00
25 Abstract: rt2x00 global information.
26 */
27
28#ifndef RT2X00_H
29#define RT2X00_H
30
31#include <linux/bitops.h>
32#include <linux/interrupt.h>
33#include <linux/skbuff.h>
34#include <linux/workqueue.h>
35#include <linux/firmware.h>
36#include <linux/leds.h>
37#include <linux/mutex.h>
38#include <linux/etherdevice.h>
39#include <linux/input-polldev.h>
40#include <linux/kfifo.h>
41#include <linux/timer.h>
42
43#include <net/mac80211.h>
44
45#include "rt2x00debug.h"
46#include "rt2x00dump.h"
47#include "rt2x00leds.h"
48#include "rt2x00reg.h"
49#include "rt2x00queue.h"
50
51/*
52 * Module information.
53 */
54#define DRV_VERSION "2.3.0"
55#define DRV_PROJECT "http://rt2x00.serialmonkey.com"
56
57/*
58 * Debug definitions.
59 * Debug output has to be enabled during compile time.
60 */
61#define DEBUG_PRINTK_MSG(__dev, __kernlvl, __lvl, __msg, __args...) \
62 printk(__kernlvl "%s -> %s: %s - " __msg, \
63 wiphy_name((__dev)->hw->wiphy), __func__, __lvl, ##__args)
64
65#define DEBUG_PRINTK_PROBE(__kernlvl, __lvl, __msg, __args...) \
66 printk(__kernlvl "%s -> %s: %s - " __msg, \
67 KBUILD_MODNAME, __func__, __lvl, ##__args)
68
69#ifdef CONFIG_RT2X00_DEBUG
70#define DEBUG_PRINTK(__dev, __kernlvl, __lvl, __msg, __args...) \
71 DEBUG_PRINTK_MSG(__dev, __kernlvl, __lvl, __msg, ##__args)
72#else
73#define DEBUG_PRINTK(__dev, __kernlvl, __lvl, __msg, __args...) \
74 do { } while (0)
75#endif /* CONFIG_RT2X00_DEBUG */
76
77/*
78 * Various debug levels.
79 * The debug levels PANIC and ERROR both indicate serious problems,
80 * for this reason they should never be ignored.
81 * The special ERROR_PROBE message is for messages that are generated
82 * when the rt2x00_dev is not yet initialized.
83 */
84#define PANIC(__dev, __msg, __args...) \
85 DEBUG_PRINTK_MSG(__dev, KERN_CRIT, "Panic", __msg, ##__args)
86#define ERROR(__dev, __msg, __args...) \
87 DEBUG_PRINTK_MSG(__dev, KERN_ERR, "Error", __msg, ##__args)
88#define ERROR_PROBE(__msg, __args...) \
89 DEBUG_PRINTK_PROBE(KERN_ERR, "Error", __msg, ##__args)
90#define WARNING(__dev, __msg, __args...) \
91 DEBUG_PRINTK(__dev, KERN_WARNING, "Warning", __msg, ##__args)
92#define NOTICE(__dev, __msg, __args...) \
93 DEBUG_PRINTK(__dev, KERN_NOTICE, "Notice", __msg, ##__args)
94#define INFO(__dev, __msg, __args...) \
95 DEBUG_PRINTK(__dev, KERN_INFO, "Info", __msg, ##__args)
96#define DEBUG(__dev, __msg, __args...) \
97 DEBUG_PRINTK(__dev, KERN_DEBUG, "Debug", __msg, ##__args)
98#define EEPROM(__dev, __msg, __args...) \
99 DEBUG_PRINTK(__dev, KERN_DEBUG, "EEPROM recovery", __msg, ##__args)
100
101/*
102 * Duration calculations
103 * The rate variable passed is: 100kbs.
104 * To convert from bytes to bits we multiply size with 8,
105 * then the size is multiplied with 10 to make the
106 * real rate -> rate argument correction.
107 */
108#define GET_DURATION(__size, __rate) (((__size) * 8 * 10) / (__rate))
109#define GET_DURATION_RES(__size, __rate)(((__size) * 8 * 10) % (__rate))
110
111/*
112 * Determine the number of L2 padding bytes required between the header and
113 * the payload.
114 */
115#define L2PAD_SIZE(__hdrlen) (-(__hdrlen) & 3)
116
117/*
118 * Determine the alignment requirement,
119 * to make sure the 802.11 payload is padded to a 4-byte boundrary
120 * we must determine the address of the payload and calculate the
121 * amount of bytes needed to move the data.
122 */
123#define ALIGN_SIZE(__skb, __header) \
124 ( ((unsigned long)((__skb)->data + (__header))) & 3 )
125
126/*
127 * Constants for extra TX headroom for alignment purposes.
128 */
129#define RT2X00_ALIGN_SIZE 4 /* Only whole frame needs alignment */
130#define RT2X00_L2PAD_SIZE 8 /* Both header & payload need alignment */
131
132/*
133 * Standard timing and size defines.
134 * These values should follow the ieee80211 specifications.
135 */
136#define ACK_SIZE 14
137#define IEEE80211_HEADER 24
138#define PLCP 48
139#define BEACON 100
140#define PREAMBLE 144
141#define SHORT_PREAMBLE 72
142#define SLOT_TIME 20
143#define SHORT_SLOT_TIME 9
144#define SIFS 10
145#define PIFS ( SIFS + SLOT_TIME )
146#define SHORT_PIFS ( SIFS + SHORT_SLOT_TIME )
147#define DIFS ( PIFS + SLOT_TIME )
148#define SHORT_DIFS ( SHORT_PIFS + SHORT_SLOT_TIME )
149#define EIFS ( SIFS + DIFS + \
150 GET_DURATION(IEEE80211_HEADER + ACK_SIZE, 10) )
151#define SHORT_EIFS ( SIFS + SHORT_DIFS + \
152 GET_DURATION(IEEE80211_HEADER + ACK_SIZE, 10) )
153
154/*
155 * Structure for average calculation
156 * The avg field contains the actual average value,
157 * but avg_weight is internally used during calculations
158 * to prevent rounding errors.
159 */
160struct avg_val {
161 int avg;
162 int avg_weight;
163};
164
165enum rt2x00_chip_intf {
166 RT2X00_CHIP_INTF_PCI,
167 RT2X00_CHIP_INTF_PCIE,
168 RT2X00_CHIP_INTF_USB,
169 RT2X00_CHIP_INTF_SOC,
170};
171
172/*
173 * Chipset identification
174 * The chipset on the device is composed of a RT and RF chip.
175 * The chipset combination is important for determining device capabilities.
176 */
177struct rt2x00_chip {
178 u16 rt;
179#define RT2460 0x2460
180#define RT2560 0x2560
181#define RT2570 0x2570
182#define RT2661 0x2661
183#define RT2573 0x2573
184#define RT2860 0x2860 /* 2.4GHz */
185#define RT2872 0x2872 /* WSOC */
186#define RT2883 0x2883 /* WSOC */
187#define RT3070 0x3070
188#define RT3071 0x3071
189#define RT3090 0x3090 /* 2.4GHz PCIe */
190#define RT3390 0x3390
191#define RT3572 0x3572
192#define RT3593 0x3593 /* PCIe */
193#define RT3883 0x3883 /* WSOC */
194#define RT5390 0x5390 /* 2.4GHz */
195
196 u16 rf;
197 u16 rev;
198
199 enum rt2x00_chip_intf intf;
200};
201
202/*
203 * RF register values that belong to a particular channel.
204 */
205struct rf_channel {
206 int channel;
207 u32 rf1;
208 u32 rf2;
209 u32 rf3;
210 u32 rf4;
211};
212
213/*
214 * Channel information structure
215 */
216struct channel_info {
217 unsigned int flags;
218#define GEOGRAPHY_ALLOWED 0x00000001
219
220 short max_power;
221 short default_power1;
222 short default_power2;
223};
224
225/*
226 * Antenna setup values.
227 */
228struct antenna_setup {
229 enum antenna rx;
230 enum antenna tx;
231 u8 rx_chain_num;
232 u8 tx_chain_num;
233};
234
235/*
236 * Quality statistics about the currently active link.
237 */
238struct link_qual {
239 /*
240 * Statistics required for Link tuning by driver
241 * The rssi value is provided by rt2x00lib during the
242 * link_tuner() callback function.
243 * The false_cca field is filled during the link_stats()
244 * callback function and could be used during the
245 * link_tuner() callback function.
246 */
247 int rssi;
248 int false_cca;
249
250 /*
251 * VGC levels
252 * Hardware driver will tune the VGC level during each call
253 * to the link_tuner() callback function. This vgc_level is
254 * is determined based on the link quality statistics like
255 * average RSSI and the false CCA count.
256 *
257 * In some cases the drivers need to differentiate between
258 * the currently "desired" VGC level and the level configured
259 * in the hardware. The latter is important to reduce the
260 * number of BBP register reads to reduce register access
261 * overhead. For this reason we store both values here.
262 */
263 u8 vgc_level;
264 u8 vgc_level_reg;
265
266 /*
267 * Statistics required for Signal quality calculation.
268 * These fields might be changed during the link_stats()
269 * callback function.
270 */
271 int rx_success;
272 int rx_failed;
273 int tx_success;
274 int tx_failed;
275};
276
277/*
278 * Antenna settings about the currently active link.
279 */
280struct link_ant {
281 /*
282 * Antenna flags
283 */
284 unsigned int flags;
285#define ANTENNA_RX_DIVERSITY 0x00000001
286#define ANTENNA_TX_DIVERSITY 0x00000002
287#define ANTENNA_MODE_SAMPLE 0x00000004
288
289 /*
290 * Currently active TX/RX antenna setup.
291 * When software diversity is used, this will indicate
292 * which antenna is actually used at this time.
293 */
294 struct antenna_setup active;
295
296 /*
297 * RSSI history information for the antenna.
298 * Used to determine when to switch antenna
299 * when using software diversity.
300 */
301 int rssi_history;
302
303 /*
304 * Current RSSI average of the currently active antenna.
305 * Similar to the avg_rssi in the link_qual structure
306 * this value is updated by using the walking average.
307 */
308 struct avg_val rssi_ant;
309};
310
311/*
312 * To optimize the quality of the link we need to store
313 * the quality of received frames and periodically
314 * optimize the link.
315 */
316struct link {
317 /*
318 * Link tuner counter
319 * The number of times the link has been tuned
320 * since the radio has been switched on.
321 */
322 u32 count;
323
324 /*
325 * Quality measurement values.
326 */
327 struct link_qual qual;
328
329 /*
330 * TX/RX antenna setup.
331 */
332 struct link_ant ant;
333
334 /*
335 * Currently active average RSSI value
336 */
337 struct avg_val avg_rssi;
338
339 /*
340 * Work structure for scheduling periodic link tuning.
341 */
342 struct delayed_work work;
343
344 /*
345 * Work structure for scheduling periodic watchdog monitoring.
346 * This work must be scheduled on the kernel workqueue, while
347 * all other work structures must be queued on the mac80211
348 * workqueue. This guarantees that the watchdog can schedule
349 * other work structures and wait for their completion in order
350 * to bring the device/driver back into the desired state.
351 */
352 struct delayed_work watchdog_work;
353
354 /*
355 * Work structure for scheduling periodic AGC adjustments.
356 */
357 struct delayed_work agc_work;
358};
359
360enum rt2x00_delayed_flags {
361 DELAYED_UPDATE_BEACON,
362};
363
364/*
365 * Interface structure
366 * Per interface configuration details, this structure
367 * is allocated as the private data for ieee80211_vif.
368 */
369struct rt2x00_intf {
370 /*
371 * beacon->skb must be protected with the mutex.
372 */
373 struct mutex beacon_skb_mutex;
374
375 /*
376 * Entry in the beacon queue which belongs to
377 * this interface. Each interface has its own
378 * dedicated beacon entry.
379 */
380 struct queue_entry *beacon;
381 bool enable_beacon;
382
383 /*
384 * Actions that needed rescheduling.
385 */
386 unsigned long delayed_flags;
387
388 /*
389 * Software sequence counter, this is only required
390 * for hardware which doesn't support hardware
391 * sequence counting.
392 */
393 spinlock_t seqlock;
394 u16 seqno;
395};
396
397static inline struct rt2x00_intf* vif_to_intf(struct ieee80211_vif *vif)
398{
399 return (struct rt2x00_intf *)vif->drv_priv;
400}
401
402/**
403 * struct hw_mode_spec: Hardware specifications structure
404 *
405 * Details about the supported modes, rates and channels
406 * of a particular chipset. This is used by rt2x00lib
407 * to build the ieee80211_hw_mode array for mac80211.
408 *
409 * @supported_bands: Bitmask contained the supported bands (2.4GHz, 5.2GHz).
410 * @supported_rates: Rate types which are supported (CCK, OFDM).
411 * @num_channels: Number of supported channels. This is used as array size
412 * for @tx_power_a, @tx_power_bg and @channels.
413 * @channels: Device/chipset specific channel values (See &struct rf_channel).
414 * @channels_info: Additional information for channels (See &struct channel_info).
415 * @ht: Driver HT Capabilities (See &ieee80211_sta_ht_cap).
416 */
417struct hw_mode_spec {
418 unsigned int supported_bands;
419#define SUPPORT_BAND_2GHZ 0x00000001
420#define SUPPORT_BAND_5GHZ 0x00000002
421
422 unsigned int supported_rates;
423#define SUPPORT_RATE_CCK 0x00000001
424#define SUPPORT_RATE_OFDM 0x00000002
425
426 unsigned int num_channels;
427 const struct rf_channel *channels;
428 const struct channel_info *channels_info;
429
430 struct ieee80211_sta_ht_cap ht;
431};
432
433/*
434 * Configuration structure wrapper around the
435 * mac80211 configuration structure.
436 * When mac80211 configures the driver, rt2x00lib
437 * can precalculate values which are equal for all
438 * rt2x00 drivers. Those values can be stored in here.
439 */
440struct rt2x00lib_conf {
441 struct ieee80211_conf *conf;
442
443 struct rf_channel rf;
444 struct channel_info channel;
445};
446
447/*
448 * Configuration structure for erp settings.
449 */
450struct rt2x00lib_erp {
451 int short_preamble;
452 int cts_protection;
453
454 u32 basic_rates;
455
456 int slot_time;
457
458 short sifs;
459 short pifs;
460 short difs;
461 short eifs;
462
463 u16 beacon_int;
464 u16 ht_opmode;
465};
466
467/*
468 * Configuration structure for hardware encryption.
469 */
470struct rt2x00lib_crypto {
471 enum cipher cipher;
472
473 enum set_key_cmd cmd;
474 const u8 *address;
475
476 u32 bssidx;
477
478 u8 key[16];
479 u8 tx_mic[8];
480 u8 rx_mic[8];
481};
482
483/*
484 * Configuration structure wrapper around the
485 * rt2x00 interface configuration handler.
486 */
487struct rt2x00intf_conf {
488 /*
489 * Interface type
490 */
491 enum nl80211_iftype type;
492
493 /*
494 * TSF sync value, this is dependent on the operation type.
495 */
496 enum tsf_sync sync;
497
498 /*
499 * The MAC and BSSID addresses are simple array of bytes,
500 * these arrays are little endian, so when sending the addresses
501 * to the drivers, copy the it into a endian-signed variable.
502 *
503 * Note that all devices (except rt2500usb) have 32 bits
504 * register word sizes. This means that whatever variable we
505 * pass _must_ be a multiple of 32 bits. Otherwise the device
506 * might not accept what we are sending to it.
507 * This will also make it easier for the driver to write
508 * the data to the device.
509 */
510 __le32 mac[2];
511 __le32 bssid[2];
512};
513
514/*
515 * rt2x00lib callback functions.
516 */
517struct rt2x00lib_ops {
518 /*
519 * Interrupt handlers.
520 */
521 irq_handler_t irq_handler;
522
523 /*
524 * TX status tasklet handler.
525 */
526 void (*txstatus_tasklet) (unsigned long data);
527 void (*pretbtt_tasklet) (unsigned long data);
528 void (*tbtt_tasklet) (unsigned long data);
529 void (*rxdone_tasklet) (unsigned long data);
530 void (*autowake_tasklet) (unsigned long data);
531
532 /*
533 * Device init handlers.
534 */
535 int (*probe_hw) (struct rt2x00_dev *rt2x00dev);
536 char *(*get_firmware_name) (struct rt2x00_dev *rt2x00dev);
537 int (*check_firmware) (struct rt2x00_dev *rt2x00dev,
538 const u8 *data, const size_t len);
539 int (*load_firmware) (struct rt2x00_dev *rt2x00dev,
540 const u8 *data, const size_t len);
541
542 /*
543 * Device initialization/deinitialization handlers.
544 */
545 int (*initialize) (struct rt2x00_dev *rt2x00dev);
546 void (*uninitialize) (struct rt2x00_dev *rt2x00dev);
547
548 /*
549 * queue initialization handlers
550 */
551 bool (*get_entry_state) (struct queue_entry *entry);
552 void (*clear_entry) (struct queue_entry *entry);
553
554 /*
555 * Radio control handlers.
556 */
557 int (*set_device_state) (struct rt2x00_dev *rt2x00dev,
558 enum dev_state state);
559 int (*rfkill_poll) (struct rt2x00_dev *rt2x00dev);
560 void (*link_stats) (struct rt2x00_dev *rt2x00dev,
561 struct link_qual *qual);
562 void (*reset_tuner) (struct rt2x00_dev *rt2x00dev,
563 struct link_qual *qual);
564 void (*link_tuner) (struct rt2x00_dev *rt2x00dev,
565 struct link_qual *qual, const u32 count);
566 void (*gain_calibration) (struct rt2x00_dev *rt2x00dev);
567
568 /*
569 * Data queue handlers.
570 */
571 void (*watchdog) (struct rt2x00_dev *rt2x00dev);
572 void (*start_queue) (struct data_queue *queue);
573 void (*kick_queue) (struct data_queue *queue);
574 void (*stop_queue) (struct data_queue *queue);
575 void (*flush_queue) (struct data_queue *queue, bool drop);
576 void (*tx_dma_done) (struct queue_entry *entry);
577
578 /*
579 * TX control handlers
580 */
581 void (*write_tx_desc) (struct queue_entry *entry,
582 struct txentry_desc *txdesc);
583 void (*write_tx_data) (struct queue_entry *entry,
584 struct txentry_desc *txdesc);
585 void (*write_beacon) (struct queue_entry *entry,
586 struct txentry_desc *txdesc);
587 void (*clear_beacon) (struct queue_entry *entry);
588 int (*get_tx_data_len) (struct queue_entry *entry);
589
590 /*
591 * RX control handlers
592 */
593 void (*fill_rxdone) (struct queue_entry *entry,
594 struct rxdone_entry_desc *rxdesc);
595
596 /*
597 * Configuration handlers.
598 */
599 int (*config_shared_key) (struct rt2x00_dev *rt2x00dev,
600 struct rt2x00lib_crypto *crypto,
601 struct ieee80211_key_conf *key);
602 int (*config_pairwise_key) (struct rt2x00_dev *rt2x00dev,
603 struct rt2x00lib_crypto *crypto,
604 struct ieee80211_key_conf *key);
605 void (*config_filter) (struct rt2x00_dev *rt2x00dev,
606 const unsigned int filter_flags);
607 void (*config_intf) (struct rt2x00_dev *rt2x00dev,
608 struct rt2x00_intf *intf,
609 struct rt2x00intf_conf *conf,
610 const unsigned int flags);
611#define CONFIG_UPDATE_TYPE ( 1 << 1 )
612#define CONFIG_UPDATE_MAC ( 1 << 2 )
613#define CONFIG_UPDATE_BSSID ( 1 << 3 )
614
615 void (*config_erp) (struct rt2x00_dev *rt2x00dev,
616 struct rt2x00lib_erp *erp,
617 u32 changed);
618 void (*config_ant) (struct rt2x00_dev *rt2x00dev,
619 struct antenna_setup *ant);
620 void (*config) (struct rt2x00_dev *rt2x00dev,
621 struct rt2x00lib_conf *libconf,
622 const unsigned int changed_flags);
623};
624
625/*
626 * rt2x00 driver callback operation structure.
627 */
628struct rt2x00_ops {
629 const char *name;
630 const unsigned int max_sta_intf;
631 const unsigned int max_ap_intf;
632 const unsigned int eeprom_size;
633 const unsigned int rf_size;
634 const unsigned int tx_queues;
635 const unsigned int extra_tx_headroom;
636 const struct data_queue_desc *rx;
637 const struct data_queue_desc *tx;
638 const struct data_queue_desc *bcn;
639 const struct data_queue_desc *atim;
640 const struct rt2x00lib_ops *lib;
641 const void *drv;
642 const struct ieee80211_ops *hw;
643#ifdef CONFIG_RT2X00_LIB_DEBUGFS
644 const struct rt2x00debug *debugfs;
645#endif /* CONFIG_RT2X00_LIB_DEBUGFS */
646};
647
648/*
649 * rt2x00 state flags
650 */
651enum rt2x00_state_flags {
652 /*
653 * Device flags
654 */
655 DEVICE_STATE_PRESENT,
656 DEVICE_STATE_REGISTERED_HW,
657 DEVICE_STATE_INITIALIZED,
658 DEVICE_STATE_STARTED,
659 DEVICE_STATE_ENABLED_RADIO,
660 DEVICE_STATE_SCANNING,
661
662 /*
663 * Driver configuration
664 */
665 CONFIG_CHANNEL_HT40,
666 CONFIG_POWERSAVING,
667};
668
669/*
670 * rt2x00 capability flags
671 */
672enum rt2x00_capability_flags {
673 /*
674 * Requirements
675 */
676 REQUIRE_FIRMWARE,
677 REQUIRE_BEACON_GUARD,
678 REQUIRE_ATIM_QUEUE,
679 REQUIRE_DMA,
680 REQUIRE_COPY_IV,
681 REQUIRE_L2PAD,
682 REQUIRE_TXSTATUS_FIFO,
683 REQUIRE_TASKLET_CONTEXT,
684 REQUIRE_SW_SEQNO,
685 REQUIRE_HT_TX_DESC,
686 REQUIRE_PS_AUTOWAKE,
687
688 /*
689 * Capabilities
690 */
691 CAPABILITY_HW_BUTTON,
692 CAPABILITY_HW_CRYPTO,
693 CAPABILITY_POWER_LIMIT,
694 CAPABILITY_CONTROL_FILTERS,
695 CAPABILITY_CONTROL_FILTER_PSPOLL,
696 CAPABILITY_PRE_TBTT_INTERRUPT,
697 CAPABILITY_LINK_TUNING,
698 CAPABILITY_FRAME_TYPE,
699 CAPABILITY_RF_SEQUENCE,
700 CAPABILITY_EXTERNAL_LNA_A,
701 CAPABILITY_EXTERNAL_LNA_BG,
702 CAPABILITY_DOUBLE_ANTENNA,
703 CAPABILITY_BT_COEXIST,
704};
705
706/*
707 * rt2x00 device structure.
708 */
709struct rt2x00_dev {
710 /*
711 * Device structure.
712 * The structure stored in here depends on the
713 * system bus (PCI or USB).
714 * When accessing this variable, the rt2x00dev_{pci,usb}
715 * macros should be used for correct typecasting.
716 */
717 struct device *dev;
718
719 /*
720 * Callback functions.
721 */
722 const struct rt2x00_ops *ops;
723
724 /*
725 * IEEE80211 control structure.
726 */
727 struct ieee80211_hw *hw;
728 struct ieee80211_supported_band bands[IEEE80211_NUM_BANDS];
729 enum ieee80211_band curr_band;
730 int curr_freq;
731
732 /*
733 * If enabled, the debugfs interface structures
734 * required for deregistration of debugfs.
735 */
736#ifdef CONFIG_RT2X00_LIB_DEBUGFS
737 struct rt2x00debug_intf *debugfs_intf;
738#endif /* CONFIG_RT2X00_LIB_DEBUGFS */
739
740 /*
741 * LED structure for changing the LED status
742 * by mac8011 or the kernel.
743 */
744#ifdef CONFIG_RT2X00_LIB_LEDS
745 struct rt2x00_led led_radio;
746 struct rt2x00_led led_assoc;
747 struct rt2x00_led led_qual;
748 u16 led_mcu_reg;
749#endif /* CONFIG_RT2X00_LIB_LEDS */
750
751 /*
752 * Device state flags.
753 * In these flags the current status is stored.
754 * Access to these flags should occur atomically.
755 */
756 unsigned long flags;
757
758 /*
759 * Device capabiltiy flags.
760 * In these flags the device/driver capabilities are stored.
761 * Access to these flags should occur non-atomically.
762 */
763 unsigned long cap_flags;
764
765 /*
766 * Device information, Bus IRQ and name (PCI, SoC)
767 */
768 int irq;
769 const char *name;
770
771 /*
772 * Chipset identification.
773 */
774 struct rt2x00_chip chip;
775
776 /*
777 * hw capability specifications.
778 */
779 struct hw_mode_spec spec;
780
781 /*
782 * This is the default TX/RX antenna setup as indicated
783 * by the device's EEPROM.
784 */
785 struct antenna_setup default_ant;
786
787 /*
788 * Register pointers
789 * csr.base: CSR base register address. (PCI)
790 * csr.cache: CSR cache for usb_control_msg. (USB)
791 */
792 union csr {
793 void __iomem *base;
794 void *cache;
795 } csr;
796
797 /*
798 * Mutex to protect register accesses.
799 * For PCI and USB devices it protects against concurrent indirect
800 * register access (BBP, RF, MCU) since accessing those
801 * registers require multiple calls to the CSR registers.
802 * For USB devices it also protects the csr_cache since that
803 * field is used for normal CSR access and it cannot support
804 * multiple callers simultaneously.
805 */
806 struct mutex csr_mutex;
807
808 /*
809 * Current packet filter configuration for the device.
810 * This contains all currently active FIF_* flags send
811 * to us by mac80211 during configure_filter().
812 */
813 unsigned int packet_filter;
814
815 /*
816 * Interface details:
817 * - Open ap interface count.
818 * - Open sta interface count.
819 * - Association count.
820 * - Beaconing enabled count.
821 */
822 unsigned int intf_ap_count;
823 unsigned int intf_sta_count;
824 unsigned int intf_associated;
825 unsigned int intf_beaconing;
826
827 /*
828 * Link quality
829 */
830 struct link link;
831
832 /*
833 * EEPROM data.
834 */
835 __le16 *eeprom;
836
837 /*
838 * Active RF register values.
839 * These are stored here so we don't need
840 * to read the rf registers and can directly
841 * use this value instead.
842 * This field should be accessed by using
843 * rt2x00_rf_read() and rt2x00_rf_write().
844 */
845 u32 *rf;
846
847 /*
848 * LNA gain
849 */
850 short lna_gain;
851
852 /*
853 * Current TX power value.
854 */
855 u16 tx_power;
856
857 /*
858 * Current retry values.
859 */
860 u8 short_retry;
861 u8 long_retry;
862
863 /*
864 * Rssi <-> Dbm offset
865 */
866 u8 rssi_offset;
867
868 /*
869 * Frequency offset (for rt61pci & rt73usb).
870 */
871 u8 freq_offset;
872
873 /*
874 * Calibration information (for rt2800usb & rt2800pci).
875 * [0] -> BW20
876 * [1] -> BW40
877 */
878 u8 calibration[2];
879
880 /*
881 * Association id.
882 */
883 u16 aid;
884
885 /*
886 * Beacon interval.
887 */
888 u16 beacon_int;
889
890 /**
891 * Timestamp of last received beacon
892 */
893 unsigned long last_beacon;
894
895 /*
896 * Low level statistics which will have
897 * to be kept up to date while device is running.
898 */
899 struct ieee80211_low_level_stats low_level_stats;
900
901 /**
902 * Work queue for all work which should not be placed
903 * on the mac80211 workqueue (because of dependencies
904 * between various work structures).
905 */
906 struct workqueue_struct *workqueue;
907
908 /*
909 * Scheduled work.
910 * NOTE: intf_work will use ieee80211_iterate_active_interfaces()
911 * which means it cannot be placed on the hw->workqueue
912 * due to RTNL locking requirements.
913 */
914 struct work_struct intf_work;
915
916 /**
917 * Scheduled work for TX/RX done handling (USB devices)
918 */
919 struct work_struct rxdone_work;
920 struct work_struct txdone_work;
921
922 /*
923 * Powersaving work
924 */
925 struct delayed_work autowakeup_work;
926
927 /*
928 * Data queue arrays for RX, TX, Beacon and ATIM.
929 */
930 unsigned int data_queues;
931 struct data_queue *rx;
932 struct data_queue *tx;
933 struct data_queue *bcn;
934 struct data_queue *atim;
935
936 /*
937 * Firmware image.
938 */
939 const struct firmware *fw;
940
941 /*
942 * FIFO for storing tx status reports between isr and tasklet.
943 */
944 DECLARE_KFIFO_PTR(txstatus_fifo, u32);
945
946 /*
947 * Timer to ensure tx status reports are read (rt2800usb).
948 */
949 struct timer_list txstatus_timer;
950
951 /*
952 * Tasklet for processing tx status reports (rt2800pci).
953 */
954 struct tasklet_struct txstatus_tasklet;
955 struct tasklet_struct pretbtt_tasklet;
956 struct tasklet_struct tbtt_tasklet;
957 struct tasklet_struct rxdone_tasklet;
958 struct tasklet_struct autowake_tasklet;
959
960 /*
961 * Protect the interrupt mask register.
962 */
963 spinlock_t irqmask_lock;
964};
965
966/*
967 * Register defines.
968 * Some registers require multiple attempts before success,
969 * in those cases REGISTER_BUSY_COUNT attempts should be
970 * taken with a REGISTER_BUSY_DELAY interval.
971 */
972#define REGISTER_BUSY_COUNT 100
973#define REGISTER_BUSY_DELAY 100
974
975/*
976 * Generic RF access.
977 * The RF is being accessed by word index.
978 */
979static inline void rt2x00_rf_read(struct rt2x00_dev *rt2x00dev,
980 const unsigned int word, u32 *data)
981{
982 BUG_ON(word < 1 || word > rt2x00dev->ops->rf_size / sizeof(u32));
983 *data = rt2x00dev->rf[word - 1];
984}
985
986static inline void rt2x00_rf_write(struct rt2x00_dev *rt2x00dev,
987 const unsigned int word, u32 data)
988{
989 BUG_ON(word < 1 || word > rt2x00dev->ops->rf_size / sizeof(u32));
990 rt2x00dev->rf[word - 1] = data;
991}
992
993/*
994 * Generic EEPROM access.
995 * The EEPROM is being accessed by word index.
996 */
997static inline void *rt2x00_eeprom_addr(struct rt2x00_dev *rt2x00dev,
998 const unsigned int word)
999{
1000 return (void *)&rt2x00dev->eeprom[word];
1001}
1002
1003static inline void rt2x00_eeprom_read(struct rt2x00_dev *rt2x00dev,
1004 const unsigned int word, u16 *data)
1005{
1006 *data = le16_to_cpu(rt2x00dev->eeprom[word]);
1007}
1008
1009static inline void rt2x00_eeprom_write(struct rt2x00_dev *rt2x00dev,
1010 const unsigned int word, u16 data)
1011{
1012 rt2x00dev->eeprom[word] = cpu_to_le16(data);
1013}
1014
1015/*
1016 * Chipset handlers
1017 */
1018static inline void rt2x00_set_chip(struct rt2x00_dev *rt2x00dev,
1019 const u16 rt, const u16 rf, const u16 rev)
1020{
1021 rt2x00dev->chip.rt = rt;
1022 rt2x00dev->chip.rf = rf;
1023 rt2x00dev->chip.rev = rev;
1024
1025 INFO(rt2x00dev,
1026 "Chipset detected - rt: %04x, rf: %04x, rev: %04x.\n",
1027 rt2x00dev->chip.rt, rt2x00dev->chip.rf, rt2x00dev->chip.rev);
1028}
1029
1030static inline bool rt2x00_rt(struct rt2x00_dev *rt2x00dev, const u16 rt)
1031{
1032 return (rt2x00dev->chip.rt == rt);
1033}
1034
1035static inline bool rt2x00_rf(struct rt2x00_dev *rt2x00dev, const u16 rf)
1036{
1037 return (rt2x00dev->chip.rf == rf);
1038}
1039
1040static inline u16 rt2x00_rev(struct rt2x00_dev *rt2x00dev)
1041{
1042 return rt2x00dev->chip.rev;
1043}
1044
1045static inline bool rt2x00_rt_rev(struct rt2x00_dev *rt2x00dev,
1046 const u16 rt, const u16 rev)
1047{
1048 return (rt2x00_rt(rt2x00dev, rt) && rt2x00_rev(rt2x00dev) == rev);
1049}
1050
1051static inline bool rt2x00_rt_rev_lt(struct rt2x00_dev *rt2x00dev,
1052 const u16 rt, const u16 rev)
1053{
1054 return (rt2x00_rt(rt2x00dev, rt) && rt2x00_rev(rt2x00dev) < rev);
1055}
1056
1057static inline bool rt2x00_rt_rev_gte(struct rt2x00_dev *rt2x00dev,
1058 const u16 rt, const u16 rev)
1059{
1060 return (rt2x00_rt(rt2x00dev, rt) && rt2x00_rev(rt2x00dev) >= rev);
1061}
1062
1063static inline void rt2x00_set_chip_intf(struct rt2x00_dev *rt2x00dev,
1064 enum rt2x00_chip_intf intf)
1065{
1066 rt2x00dev->chip.intf = intf;
1067}
1068
1069static inline bool rt2x00_intf(struct rt2x00_dev *rt2x00dev,
1070 enum rt2x00_chip_intf intf)
1071{
1072 return (rt2x00dev->chip.intf == intf);
1073}
1074
1075static inline bool rt2x00_is_pci(struct rt2x00_dev *rt2x00dev)
1076{
1077 return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_PCI) ||
1078 rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE);
1079}
1080
1081static inline bool rt2x00_is_pcie(struct rt2x00_dev *rt2x00dev)
1082{
1083 return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE);
1084}
1085
1086static inline bool rt2x00_is_usb(struct rt2x00_dev *rt2x00dev)
1087{
1088 return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_USB);
1089}
1090
1091static inline bool rt2x00_is_soc(struct rt2x00_dev *rt2x00dev)
1092{
1093 return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_SOC);
1094}
1095
1096/**
1097 * rt2x00queue_map_txskb - Map a skb into DMA for TX purposes.
1098 * @entry: Pointer to &struct queue_entry
1099 */
1100void rt2x00queue_map_txskb(struct queue_entry *entry);
1101
1102/**
1103 * rt2x00queue_unmap_skb - Unmap a skb from DMA.
1104 * @entry: Pointer to &struct queue_entry
1105 */
1106void rt2x00queue_unmap_skb(struct queue_entry *entry);
1107
1108/**
1109 * rt2x00queue_get_tx_queue - Convert tx queue index to queue pointer
1110 * @rt2x00dev: Pointer to &struct rt2x00_dev.
1111 * @queue: rt2x00 queue index (see &enum data_queue_qid).
1112 *
1113 * Returns NULL for non tx queues.
1114 */
1115static inline struct data_queue *
1116rt2x00queue_get_tx_queue(struct rt2x00_dev *rt2x00dev,
1117 const enum data_queue_qid queue)
1118{
1119 if (queue < rt2x00dev->ops->tx_queues && rt2x00dev->tx)
1120 return &rt2x00dev->tx[queue];
1121
1122 if (queue == QID_ATIM)
1123 return rt2x00dev->atim;
1124
1125 return NULL;
1126}
1127
1128/**
1129 * rt2x00queue_get_entry - Get queue entry where the given index points to.
1130 * @queue: Pointer to &struct data_queue from where we obtain the entry.
1131 * @index: Index identifier for obtaining the correct index.
1132 */
1133struct queue_entry *rt2x00queue_get_entry(struct data_queue *queue,
1134 enum queue_index index);
1135
1136/**
1137 * rt2x00queue_pause_queue - Pause a data queue
1138 * @queue: Pointer to &struct data_queue.
1139 *
1140 * This function will pause the data queue locally, preventing
1141 * new frames to be added to the queue (while the hardware is
1142 * still allowed to run).
1143 */
1144void rt2x00queue_pause_queue(struct data_queue *queue);
1145
1146/**
1147 * rt2x00queue_unpause_queue - unpause a data queue
1148 * @queue: Pointer to &struct data_queue.
1149 *
1150 * This function will unpause the data queue locally, allowing
1151 * new frames to be added to the queue again.
1152 */
1153void rt2x00queue_unpause_queue(struct data_queue *queue);
1154
1155/**
1156 * rt2x00queue_start_queue - Start a data queue
1157 * @queue: Pointer to &struct data_queue.
1158 *
1159 * This function will start handling all pending frames in the queue.
1160 */
1161void rt2x00queue_start_queue(struct data_queue *queue);
1162
1163/**
1164 * rt2x00queue_stop_queue - Halt a data queue
1165 * @queue: Pointer to &struct data_queue.
1166 *
1167 * This function will stop all pending frames in the queue.
1168 */
1169void rt2x00queue_stop_queue(struct data_queue *queue);
1170
1171/**
1172 * rt2x00queue_flush_queue - Flush a data queue
1173 * @queue: Pointer to &struct data_queue.
1174 * @drop: True to drop all pending frames.
1175 *
1176 * This function will flush the queue. After this call
1177 * the queue is guaranteed to be empty.
1178 */
1179void rt2x00queue_flush_queue(struct data_queue *queue, bool drop);
1180
1181/**
1182 * rt2x00queue_start_queues - Start all data queues
1183 * @rt2x00dev: Pointer to &struct rt2x00_dev.
1184 *
1185 * This function will loop through all available queues to start them
1186 */
1187void rt2x00queue_start_queues(struct rt2x00_dev *rt2x00dev);
1188
1189/**
1190 * rt2x00queue_stop_queues - Halt all data queues
1191 * @rt2x00dev: Pointer to &struct rt2x00_dev.
1192 *
1193 * This function will loop through all available queues to stop
1194 * any pending frames.
1195 */
1196void rt2x00queue_stop_queues(struct rt2x00_dev *rt2x00dev);
1197
1198/**
1199 * rt2x00queue_flush_queues - Flush all data queues
1200 * @rt2x00dev: Pointer to &struct rt2x00_dev.
1201 * @drop: True to drop all pending frames.
1202 *
1203 * This function will loop through all available queues to flush
1204 * any pending frames.
1205 */
1206void rt2x00queue_flush_queues(struct rt2x00_dev *rt2x00dev, bool drop);
1207
1208/*
1209 * Debugfs handlers.
1210 */
1211/**
1212 * rt2x00debug_dump_frame - Dump a frame to userspace through debugfs.
1213 * @rt2x00dev: Pointer to &struct rt2x00_dev.
1214 * @type: The type of frame that is being dumped.
1215 * @skb: The skb containing the frame to be dumped.
1216 */
1217#ifdef CONFIG_RT2X00_LIB_DEBUGFS
1218void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
1219 enum rt2x00_dump_type type, struct sk_buff *skb);
1220#else
1221static inline void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
1222 enum rt2x00_dump_type type,
1223 struct sk_buff *skb)
1224{
1225}
1226#endif /* CONFIG_RT2X00_LIB_DEBUGFS */
1227
1228/*
1229 * Interrupt context handlers.
1230 */
1231void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev);
1232void rt2x00lib_pretbtt(struct rt2x00_dev *rt2x00dev);
1233void rt2x00lib_dmastart(struct queue_entry *entry);
1234void rt2x00lib_dmadone(struct queue_entry *entry);
1235void rt2x00lib_txdone(struct queue_entry *entry,
1236 struct txdone_entry_desc *txdesc);
1237void rt2x00lib_txdone_noinfo(struct queue_entry *entry, u32 status);
1238void rt2x00lib_rxdone(struct queue_entry *entry);
1239
1240/*
1241 * mac80211 handlers.
1242 */
1243void rt2x00mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb);
1244int rt2x00mac_start(struct ieee80211_hw *hw);
1245void rt2x00mac_stop(struct ieee80211_hw *hw);
1246int rt2x00mac_add_interface(struct ieee80211_hw *hw,
1247 struct ieee80211_vif *vif);
1248void rt2x00mac_remove_interface(struct ieee80211_hw *hw,
1249 struct ieee80211_vif *vif);
1250int rt2x00mac_config(struct ieee80211_hw *hw, u32 changed);
1251void rt2x00mac_configure_filter(struct ieee80211_hw *hw,
1252 unsigned int changed_flags,
1253 unsigned int *total_flags,
1254 u64 multicast);
1255int rt2x00mac_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
1256 bool set);
1257#ifdef CONFIG_RT2X00_LIB_CRYPTO
1258int rt2x00mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
1259 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
1260 struct ieee80211_key_conf *key);
1261#else
1262#define rt2x00mac_set_key NULL
1263#endif /* CONFIG_RT2X00_LIB_CRYPTO */
1264void rt2x00mac_sw_scan_start(struct ieee80211_hw *hw);
1265void rt2x00mac_sw_scan_complete(struct ieee80211_hw *hw);
1266int rt2x00mac_get_stats(struct ieee80211_hw *hw,
1267 struct ieee80211_low_level_stats *stats);
1268void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw,
1269 struct ieee80211_vif *vif,
1270 struct ieee80211_bss_conf *bss_conf,
1271 u32 changes);
1272int rt2x00mac_conf_tx(struct ieee80211_hw *hw, u16 queue,
1273 const struct ieee80211_tx_queue_params *params);
1274void rt2x00mac_rfkill_poll(struct ieee80211_hw *hw);
1275void rt2x00mac_flush(struct ieee80211_hw *hw, bool drop);
1276int rt2x00mac_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant);
1277int rt2x00mac_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant);
1278void rt2x00mac_get_ringparam(struct ieee80211_hw *hw,
1279 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max);
1280bool rt2x00mac_tx_frames_pending(struct ieee80211_hw *hw);
1281
1282/*
1283 * Driver allocation handlers.
1284 */
1285int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev);
1286void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev);
1287#ifdef CONFIG_PM
1288int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state);
1289int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev);
1290#endif /* CONFIG_PM */
1291
1292#endif /* RT2X00_H */
1/*
2 Copyright (C) 2010 Willow Garage <http://www.willowgarage.com>
3 Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com>
4 Copyright (C) 2004 - 2009 Gertjan van Wingerde <gwingerde@gmail.com>
5 <http://rt2x00.serialmonkey.com>
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, see <http://www.gnu.org/licenses/>.
19 */
20
21/*
22 Module: rt2x00
23 Abstract: rt2x00 global information.
24 */
25
26#ifndef RT2X00_H
27#define RT2X00_H
28
29#include <linux/bitops.h>
30#include <linux/interrupt.h>
31#include <linux/skbuff.h>
32#include <linux/workqueue.h>
33#include <linux/firmware.h>
34#include <linux/leds.h>
35#include <linux/mutex.h>
36#include <linux/etherdevice.h>
37#include <linux/input-polldev.h>
38#include <linux/kfifo.h>
39#include <linux/hrtimer.h>
40#include <linux/average.h>
41
42#include <net/mac80211.h>
43
44#include "rt2x00debug.h"
45#include "rt2x00dump.h"
46#include "rt2x00leds.h"
47#include "rt2x00reg.h"
48#include "rt2x00queue.h"
49
50/*
51 * Module information.
52 */
53#define DRV_VERSION "2.3.0"
54#define DRV_PROJECT "http://rt2x00.serialmonkey.com"
55
56/* Debug definitions.
57 * Debug output has to be enabled during compile time.
58 */
59#ifdef CONFIG_RT2X00_DEBUG
60#define DEBUG
61#endif /* CONFIG_RT2X00_DEBUG */
62
63/* Utility printing macros
64 * rt2x00_probe_err is for messages when rt2x00_dev is uninitialized
65 */
66#define rt2x00_probe_err(fmt, ...) \
67 printk(KERN_ERR KBUILD_MODNAME ": %s: Error - " fmt, \
68 __func__, ##__VA_ARGS__)
69#define rt2x00_err(dev, fmt, ...) \
70 wiphy_err((dev)->hw->wiphy, "%s: Error - " fmt, \
71 __func__, ##__VA_ARGS__)
72#define rt2x00_warn(dev, fmt, ...) \
73 wiphy_warn((dev)->hw->wiphy, "%s: Warning - " fmt, \
74 __func__, ##__VA_ARGS__)
75#define rt2x00_info(dev, fmt, ...) \
76 wiphy_info((dev)->hw->wiphy, "%s: Info - " fmt, \
77 __func__, ##__VA_ARGS__)
78
79/* Various debug levels */
80#define rt2x00_dbg(dev, fmt, ...) \
81 wiphy_dbg((dev)->hw->wiphy, "%s: Debug - " fmt, \
82 __func__, ##__VA_ARGS__)
83#define rt2x00_eeprom_dbg(dev, fmt, ...) \
84 wiphy_dbg((dev)->hw->wiphy, "%s: EEPROM recovery - " fmt, \
85 __func__, ##__VA_ARGS__)
86
87/*
88 * Duration calculations
89 * The rate variable passed is: 100kbs.
90 * To convert from bytes to bits we multiply size with 8,
91 * then the size is multiplied with 10 to make the
92 * real rate -> rate argument correction.
93 */
94#define GET_DURATION(__size, __rate) (((__size) * 8 * 10) / (__rate))
95#define GET_DURATION_RES(__size, __rate)(((__size) * 8 * 10) % (__rate))
96
97/*
98 * Determine the number of L2 padding bytes required between the header and
99 * the payload.
100 */
101#define L2PAD_SIZE(__hdrlen) (-(__hdrlen) & 3)
102
103/*
104 * Determine the alignment requirement,
105 * to make sure the 802.11 payload is padded to a 4-byte boundrary
106 * we must determine the address of the payload and calculate the
107 * amount of bytes needed to move the data.
108 */
109#define ALIGN_SIZE(__skb, __header) \
110 ( ((unsigned long)((__skb)->data + (__header))) & 3 )
111
112/*
113 * Constants for extra TX headroom for alignment purposes.
114 */
115#define RT2X00_ALIGN_SIZE 4 /* Only whole frame needs alignment */
116#define RT2X00_L2PAD_SIZE 8 /* Both header & payload need alignment */
117
118/*
119 * Standard timing and size defines.
120 * These values should follow the ieee80211 specifications.
121 */
122#define ACK_SIZE 14
123#define IEEE80211_HEADER 24
124#define PLCP 48
125#define BEACON 100
126#define PREAMBLE 144
127#define SHORT_PREAMBLE 72
128#define SLOT_TIME 20
129#define SHORT_SLOT_TIME 9
130#define SIFS 10
131#define PIFS ( SIFS + SLOT_TIME )
132#define SHORT_PIFS ( SIFS + SHORT_SLOT_TIME )
133#define DIFS ( PIFS + SLOT_TIME )
134#define SHORT_DIFS ( SHORT_PIFS + SHORT_SLOT_TIME )
135#define EIFS ( SIFS + DIFS + \
136 GET_DURATION(IEEE80211_HEADER + ACK_SIZE, 10) )
137#define SHORT_EIFS ( SIFS + SHORT_DIFS + \
138 GET_DURATION(IEEE80211_HEADER + ACK_SIZE, 10) )
139
140enum rt2x00_chip_intf {
141 RT2X00_CHIP_INTF_PCI,
142 RT2X00_CHIP_INTF_PCIE,
143 RT2X00_CHIP_INTF_USB,
144 RT2X00_CHIP_INTF_SOC,
145};
146
147/*
148 * Chipset identification
149 * The chipset on the device is composed of a RT and RF chip.
150 * The chipset combination is important for determining device capabilities.
151 */
152struct rt2x00_chip {
153 u16 rt;
154#define RT2460 0x2460
155#define RT2560 0x2560
156#define RT2570 0x2570
157#define RT2661 0x2661
158#define RT2573 0x2573
159#define RT2860 0x2860 /* 2.4GHz */
160#define RT2872 0x2872 /* WSOC */
161#define RT2883 0x2883 /* WSOC */
162#define RT3070 0x3070
163#define RT3071 0x3071
164#define RT3090 0x3090 /* 2.4GHz PCIe */
165#define RT3290 0x3290
166#define RT3352 0x3352 /* WSOC */
167#define RT3390 0x3390
168#define RT3572 0x3572
169#define RT3593 0x3593
170#define RT3883 0x3883 /* WSOC */
171#define RT5390 0x5390 /* 2.4GHz */
172#define RT5392 0x5392 /* 2.4GHz */
173#define RT5592 0x5592
174
175 u16 rf;
176 u16 rev;
177
178 enum rt2x00_chip_intf intf;
179};
180
181/*
182 * RF register values that belong to a particular channel.
183 */
184struct rf_channel {
185 int channel;
186 u32 rf1;
187 u32 rf2;
188 u32 rf3;
189 u32 rf4;
190};
191
192/*
193 * Channel information structure
194 */
195struct channel_info {
196 unsigned int flags;
197#define GEOGRAPHY_ALLOWED 0x00000001
198
199 short max_power;
200 short default_power1;
201 short default_power2;
202 short default_power3;
203};
204
205/*
206 * Antenna setup values.
207 */
208struct antenna_setup {
209 enum antenna rx;
210 enum antenna tx;
211 u8 rx_chain_num;
212 u8 tx_chain_num;
213};
214
215/*
216 * Quality statistics about the currently active link.
217 */
218struct link_qual {
219 /*
220 * Statistics required for Link tuning by driver
221 * The rssi value is provided by rt2x00lib during the
222 * link_tuner() callback function.
223 * The false_cca field is filled during the link_stats()
224 * callback function and could be used during the
225 * link_tuner() callback function.
226 */
227 int rssi;
228 int false_cca;
229
230 /*
231 * VGC levels
232 * Hardware driver will tune the VGC level during each call
233 * to the link_tuner() callback function. This vgc_level is
234 * is determined based on the link quality statistics like
235 * average RSSI and the false CCA count.
236 *
237 * In some cases the drivers need to differentiate between
238 * the currently "desired" VGC level and the level configured
239 * in the hardware. The latter is important to reduce the
240 * number of BBP register reads to reduce register access
241 * overhead. For this reason we store both values here.
242 */
243 u8 vgc_level;
244 u8 vgc_level_reg;
245
246 /*
247 * Statistics required for Signal quality calculation.
248 * These fields might be changed during the link_stats()
249 * callback function.
250 */
251 int rx_success;
252 int rx_failed;
253 int tx_success;
254 int tx_failed;
255};
256
257/*
258 * Antenna settings about the currently active link.
259 */
260struct link_ant {
261 /*
262 * Antenna flags
263 */
264 unsigned int flags;
265#define ANTENNA_RX_DIVERSITY 0x00000001
266#define ANTENNA_TX_DIVERSITY 0x00000002
267#define ANTENNA_MODE_SAMPLE 0x00000004
268
269 /*
270 * Currently active TX/RX antenna setup.
271 * When software diversity is used, this will indicate
272 * which antenna is actually used at this time.
273 */
274 struct antenna_setup active;
275
276 /*
277 * RSSI history information for the antenna.
278 * Used to determine when to switch antenna
279 * when using software diversity.
280 */
281 int rssi_history;
282
283 /*
284 * Current RSSI average of the currently active antenna.
285 * Similar to the avg_rssi in the link_qual structure
286 * this value is updated by using the walking average.
287 */
288 struct ewma rssi_ant;
289};
290
291/*
292 * To optimize the quality of the link we need to store
293 * the quality of received frames and periodically
294 * optimize the link.
295 */
296struct link {
297 /*
298 * Link tuner counter
299 * The number of times the link has been tuned
300 * since the radio has been switched on.
301 */
302 u32 count;
303
304 /*
305 * Quality measurement values.
306 */
307 struct link_qual qual;
308
309 /*
310 * TX/RX antenna setup.
311 */
312 struct link_ant ant;
313
314 /*
315 * Currently active average RSSI value
316 */
317 struct ewma avg_rssi;
318
319 /*
320 * Work structure for scheduling periodic link tuning.
321 */
322 struct delayed_work work;
323
324 /*
325 * Work structure for scheduling periodic watchdog monitoring.
326 * This work must be scheduled on the kernel workqueue, while
327 * all other work structures must be queued on the mac80211
328 * workqueue. This guarantees that the watchdog can schedule
329 * other work structures and wait for their completion in order
330 * to bring the device/driver back into the desired state.
331 */
332 struct delayed_work watchdog_work;
333
334 /*
335 * Work structure for scheduling periodic AGC adjustments.
336 */
337 struct delayed_work agc_work;
338
339 /*
340 * Work structure for scheduling periodic VCO calibration.
341 */
342 struct delayed_work vco_work;
343};
344
345enum rt2x00_delayed_flags {
346 DELAYED_UPDATE_BEACON,
347};
348
349/*
350 * Interface structure
351 * Per interface configuration details, this structure
352 * is allocated as the private data for ieee80211_vif.
353 */
354struct rt2x00_intf {
355 /*
356 * beacon->skb must be protected with the mutex.
357 */
358 struct mutex beacon_skb_mutex;
359
360 /*
361 * Entry in the beacon queue which belongs to
362 * this interface. Each interface has its own
363 * dedicated beacon entry.
364 */
365 struct queue_entry *beacon;
366 bool enable_beacon;
367
368 /*
369 * Actions that needed rescheduling.
370 */
371 unsigned long delayed_flags;
372
373 /*
374 * Software sequence counter, this is only required
375 * for hardware which doesn't support hardware
376 * sequence counting.
377 */
378 atomic_t seqno;
379};
380
381static inline struct rt2x00_intf* vif_to_intf(struct ieee80211_vif *vif)
382{
383 return (struct rt2x00_intf *)vif->drv_priv;
384}
385
386/**
387 * struct hw_mode_spec: Hardware specifications structure
388 *
389 * Details about the supported modes, rates and channels
390 * of a particular chipset. This is used by rt2x00lib
391 * to build the ieee80211_hw_mode array for mac80211.
392 *
393 * @supported_bands: Bitmask contained the supported bands (2.4GHz, 5.2GHz).
394 * @supported_rates: Rate types which are supported (CCK, OFDM).
395 * @num_channels: Number of supported channels. This is used as array size
396 * for @tx_power_a, @tx_power_bg and @channels.
397 * @channels: Device/chipset specific channel values (See &struct rf_channel).
398 * @channels_info: Additional information for channels (See &struct channel_info).
399 * @ht: Driver HT Capabilities (See &ieee80211_sta_ht_cap).
400 */
401struct hw_mode_spec {
402 unsigned int supported_bands;
403#define SUPPORT_BAND_2GHZ 0x00000001
404#define SUPPORT_BAND_5GHZ 0x00000002
405
406 unsigned int supported_rates;
407#define SUPPORT_RATE_CCK 0x00000001
408#define SUPPORT_RATE_OFDM 0x00000002
409
410 unsigned int num_channels;
411 const struct rf_channel *channels;
412 const struct channel_info *channels_info;
413
414 struct ieee80211_sta_ht_cap ht;
415};
416
417/*
418 * Configuration structure wrapper around the
419 * mac80211 configuration structure.
420 * When mac80211 configures the driver, rt2x00lib
421 * can precalculate values which are equal for all
422 * rt2x00 drivers. Those values can be stored in here.
423 */
424struct rt2x00lib_conf {
425 struct ieee80211_conf *conf;
426
427 struct rf_channel rf;
428 struct channel_info channel;
429};
430
431/*
432 * Configuration structure for erp settings.
433 */
434struct rt2x00lib_erp {
435 int short_preamble;
436 int cts_protection;
437
438 u32 basic_rates;
439
440 int slot_time;
441
442 short sifs;
443 short pifs;
444 short difs;
445 short eifs;
446
447 u16 beacon_int;
448 u16 ht_opmode;
449};
450
451/*
452 * Configuration structure for hardware encryption.
453 */
454struct rt2x00lib_crypto {
455 enum cipher cipher;
456
457 enum set_key_cmd cmd;
458 const u8 *address;
459
460 u32 bssidx;
461
462 u8 key[16];
463 u8 tx_mic[8];
464 u8 rx_mic[8];
465
466 int wcid;
467};
468
469/*
470 * Configuration structure wrapper around the
471 * rt2x00 interface configuration handler.
472 */
473struct rt2x00intf_conf {
474 /*
475 * Interface type
476 */
477 enum nl80211_iftype type;
478
479 /*
480 * TSF sync value, this is dependent on the operation type.
481 */
482 enum tsf_sync sync;
483
484 /*
485 * The MAC and BSSID addresses are simple array of bytes,
486 * these arrays are little endian, so when sending the addresses
487 * to the drivers, copy the it into a endian-signed variable.
488 *
489 * Note that all devices (except rt2500usb) have 32 bits
490 * register word sizes. This means that whatever variable we
491 * pass _must_ be a multiple of 32 bits. Otherwise the device
492 * might not accept what we are sending to it.
493 * This will also make it easier for the driver to write
494 * the data to the device.
495 */
496 __le32 mac[2];
497 __le32 bssid[2];
498};
499
500/*
501 * Private structure for storing STA details
502 * wcid: Wireless Client ID
503 */
504struct rt2x00_sta {
505 int wcid;
506};
507
508static inline struct rt2x00_sta* sta_to_rt2x00_sta(struct ieee80211_sta *sta)
509{
510 return (struct rt2x00_sta *)sta->drv_priv;
511}
512
513/*
514 * rt2x00lib callback functions.
515 */
516struct rt2x00lib_ops {
517 /*
518 * Interrupt handlers.
519 */
520 irq_handler_t irq_handler;
521
522 /*
523 * TX status tasklet handler.
524 */
525 void (*txstatus_tasklet) (unsigned long data);
526 void (*pretbtt_tasklet) (unsigned long data);
527 void (*tbtt_tasklet) (unsigned long data);
528 void (*rxdone_tasklet) (unsigned long data);
529 void (*autowake_tasklet) (unsigned long data);
530
531 /*
532 * Device init handlers.
533 */
534 int (*probe_hw) (struct rt2x00_dev *rt2x00dev);
535 char *(*get_firmware_name) (struct rt2x00_dev *rt2x00dev);
536 int (*check_firmware) (struct rt2x00_dev *rt2x00dev,
537 const u8 *data, const size_t len);
538 int (*load_firmware) (struct rt2x00_dev *rt2x00dev,
539 const u8 *data, const size_t len);
540
541 /*
542 * Device initialization/deinitialization handlers.
543 */
544 int (*initialize) (struct rt2x00_dev *rt2x00dev);
545 void (*uninitialize) (struct rt2x00_dev *rt2x00dev);
546
547 /*
548 * queue initialization handlers
549 */
550 bool (*get_entry_state) (struct queue_entry *entry);
551 void (*clear_entry) (struct queue_entry *entry);
552
553 /*
554 * Radio control handlers.
555 */
556 int (*set_device_state) (struct rt2x00_dev *rt2x00dev,
557 enum dev_state state);
558 int (*rfkill_poll) (struct rt2x00_dev *rt2x00dev);
559 void (*link_stats) (struct rt2x00_dev *rt2x00dev,
560 struct link_qual *qual);
561 void (*reset_tuner) (struct rt2x00_dev *rt2x00dev,
562 struct link_qual *qual);
563 void (*link_tuner) (struct rt2x00_dev *rt2x00dev,
564 struct link_qual *qual, const u32 count);
565 void (*gain_calibration) (struct rt2x00_dev *rt2x00dev);
566 void (*vco_calibration) (struct rt2x00_dev *rt2x00dev);
567
568 /*
569 * Data queue handlers.
570 */
571 void (*watchdog) (struct rt2x00_dev *rt2x00dev);
572 void (*start_queue) (struct data_queue *queue);
573 void (*kick_queue) (struct data_queue *queue);
574 void (*stop_queue) (struct data_queue *queue);
575 void (*flush_queue) (struct data_queue *queue, bool drop);
576 void (*tx_dma_done) (struct queue_entry *entry);
577
578 /*
579 * TX control handlers
580 */
581 void (*write_tx_desc) (struct queue_entry *entry,
582 struct txentry_desc *txdesc);
583 void (*write_tx_data) (struct queue_entry *entry,
584 struct txentry_desc *txdesc);
585 void (*write_beacon) (struct queue_entry *entry,
586 struct txentry_desc *txdesc);
587 void (*clear_beacon) (struct queue_entry *entry);
588 int (*get_tx_data_len) (struct queue_entry *entry);
589
590 /*
591 * RX control handlers
592 */
593 void (*fill_rxdone) (struct queue_entry *entry,
594 struct rxdone_entry_desc *rxdesc);
595
596 /*
597 * Configuration handlers.
598 */
599 int (*config_shared_key) (struct rt2x00_dev *rt2x00dev,
600 struct rt2x00lib_crypto *crypto,
601 struct ieee80211_key_conf *key);
602 int (*config_pairwise_key) (struct rt2x00_dev *rt2x00dev,
603 struct rt2x00lib_crypto *crypto,
604 struct ieee80211_key_conf *key);
605 void (*config_filter) (struct rt2x00_dev *rt2x00dev,
606 const unsigned int filter_flags);
607 void (*config_intf) (struct rt2x00_dev *rt2x00dev,
608 struct rt2x00_intf *intf,
609 struct rt2x00intf_conf *conf,
610 const unsigned int flags);
611#define CONFIG_UPDATE_TYPE ( 1 << 1 )
612#define CONFIG_UPDATE_MAC ( 1 << 2 )
613#define CONFIG_UPDATE_BSSID ( 1 << 3 )
614
615 void (*config_erp) (struct rt2x00_dev *rt2x00dev,
616 struct rt2x00lib_erp *erp,
617 u32 changed);
618 void (*config_ant) (struct rt2x00_dev *rt2x00dev,
619 struct antenna_setup *ant);
620 void (*config) (struct rt2x00_dev *rt2x00dev,
621 struct rt2x00lib_conf *libconf,
622 const unsigned int changed_flags);
623 int (*sta_add) (struct rt2x00_dev *rt2x00dev,
624 struct ieee80211_vif *vif,
625 struct ieee80211_sta *sta);
626 int (*sta_remove) (struct rt2x00_dev *rt2x00dev,
627 int wcid);
628};
629
630/*
631 * rt2x00 driver callback operation structure.
632 */
633struct rt2x00_ops {
634 const char *name;
635 const unsigned int drv_data_size;
636 const unsigned int max_ap_intf;
637 const unsigned int eeprom_size;
638 const unsigned int rf_size;
639 const unsigned int tx_queues;
640 void (*queue_init)(struct data_queue *queue);
641 const struct rt2x00lib_ops *lib;
642 const void *drv;
643 const struct ieee80211_ops *hw;
644#ifdef CONFIG_RT2X00_LIB_DEBUGFS
645 const struct rt2x00debug *debugfs;
646#endif /* CONFIG_RT2X00_LIB_DEBUGFS */
647};
648
649/*
650 * rt2x00 state flags
651 */
652enum rt2x00_state_flags {
653 /*
654 * Device flags
655 */
656 DEVICE_STATE_PRESENT,
657 DEVICE_STATE_REGISTERED_HW,
658 DEVICE_STATE_INITIALIZED,
659 DEVICE_STATE_STARTED,
660 DEVICE_STATE_ENABLED_RADIO,
661 DEVICE_STATE_SCANNING,
662
663 /*
664 * Driver configuration
665 */
666 CONFIG_CHANNEL_HT40,
667 CONFIG_POWERSAVING,
668 CONFIG_HT_DISABLED,
669 CONFIG_QOS_DISABLED,
670
671 /*
672 * Mark we currently are sequentially reading TX_STA_FIFO register
673 * FIXME: this is for only rt2800usb, should go to private data
674 */
675 TX_STATUS_READING,
676};
677
678/*
679 * rt2x00 capability flags
680 */
681enum rt2x00_capability_flags {
682 /*
683 * Requirements
684 */
685 REQUIRE_FIRMWARE,
686 REQUIRE_BEACON_GUARD,
687 REQUIRE_ATIM_QUEUE,
688 REQUIRE_DMA,
689 REQUIRE_COPY_IV,
690 REQUIRE_L2PAD,
691 REQUIRE_TXSTATUS_FIFO,
692 REQUIRE_TASKLET_CONTEXT,
693 REQUIRE_SW_SEQNO,
694 REQUIRE_HT_TX_DESC,
695 REQUIRE_PS_AUTOWAKE,
696
697 /*
698 * Capabilities
699 */
700 CAPABILITY_HW_BUTTON,
701 CAPABILITY_HW_CRYPTO,
702 CAPABILITY_POWER_LIMIT,
703 CAPABILITY_CONTROL_FILTERS,
704 CAPABILITY_CONTROL_FILTER_PSPOLL,
705 CAPABILITY_PRE_TBTT_INTERRUPT,
706 CAPABILITY_LINK_TUNING,
707 CAPABILITY_FRAME_TYPE,
708 CAPABILITY_RF_SEQUENCE,
709 CAPABILITY_EXTERNAL_LNA_A,
710 CAPABILITY_EXTERNAL_LNA_BG,
711 CAPABILITY_DOUBLE_ANTENNA,
712 CAPABILITY_BT_COEXIST,
713 CAPABILITY_VCO_RECALIBRATION,
714};
715
716/*
717 * Interface combinations
718 */
719enum {
720 IF_COMB_AP = 0,
721 NUM_IF_COMB,
722};
723
724/*
725 * rt2x00 device structure.
726 */
727struct rt2x00_dev {
728 /*
729 * Device structure.
730 * The structure stored in here depends on the
731 * system bus (PCI or USB).
732 * When accessing this variable, the rt2x00dev_{pci,usb}
733 * macros should be used for correct typecasting.
734 */
735 struct device *dev;
736
737 /*
738 * Callback functions.
739 */
740 const struct rt2x00_ops *ops;
741
742 /*
743 * Driver data.
744 */
745 void *drv_data;
746
747 /*
748 * IEEE80211 control structure.
749 */
750 struct ieee80211_hw *hw;
751 struct ieee80211_supported_band bands[IEEE80211_NUM_BANDS];
752 enum ieee80211_band curr_band;
753 int curr_freq;
754
755 /*
756 * If enabled, the debugfs interface structures
757 * required for deregistration of debugfs.
758 */
759#ifdef CONFIG_RT2X00_LIB_DEBUGFS
760 struct rt2x00debug_intf *debugfs_intf;
761#endif /* CONFIG_RT2X00_LIB_DEBUGFS */
762
763 /*
764 * LED structure for changing the LED status
765 * by mac8011 or the kernel.
766 */
767#ifdef CONFIG_RT2X00_LIB_LEDS
768 struct rt2x00_led led_radio;
769 struct rt2x00_led led_assoc;
770 struct rt2x00_led led_qual;
771 u16 led_mcu_reg;
772#endif /* CONFIG_RT2X00_LIB_LEDS */
773
774 /*
775 * Device state flags.
776 * In these flags the current status is stored.
777 * Access to these flags should occur atomically.
778 */
779 unsigned long flags;
780
781 /*
782 * Device capabiltiy flags.
783 * In these flags the device/driver capabilities are stored.
784 * Access to these flags should occur non-atomically.
785 */
786 unsigned long cap_flags;
787
788 /*
789 * Device information, Bus IRQ and name (PCI, SoC)
790 */
791 int irq;
792 const char *name;
793
794 /*
795 * Chipset identification.
796 */
797 struct rt2x00_chip chip;
798
799 /*
800 * hw capability specifications.
801 */
802 struct hw_mode_spec spec;
803
804 /*
805 * This is the default TX/RX antenna setup as indicated
806 * by the device's EEPROM.
807 */
808 struct antenna_setup default_ant;
809
810 /*
811 * Register pointers
812 * csr.base: CSR base register address. (PCI)
813 * csr.cache: CSR cache for usb_control_msg. (USB)
814 */
815 union csr {
816 void __iomem *base;
817 void *cache;
818 } csr;
819
820 /*
821 * Mutex to protect register accesses.
822 * For PCI and USB devices it protects against concurrent indirect
823 * register access (BBP, RF, MCU) since accessing those
824 * registers require multiple calls to the CSR registers.
825 * For USB devices it also protects the csr_cache since that
826 * field is used for normal CSR access and it cannot support
827 * multiple callers simultaneously.
828 */
829 struct mutex csr_mutex;
830
831 /*
832 * Current packet filter configuration for the device.
833 * This contains all currently active FIF_* flags send
834 * to us by mac80211 during configure_filter().
835 */
836 unsigned int packet_filter;
837
838 /*
839 * Interface details:
840 * - Open ap interface count.
841 * - Open sta interface count.
842 * - Association count.
843 * - Beaconing enabled count.
844 */
845 unsigned int intf_ap_count;
846 unsigned int intf_sta_count;
847 unsigned int intf_associated;
848 unsigned int intf_beaconing;
849
850 /*
851 * Interface combinations
852 */
853 struct ieee80211_iface_limit if_limits_ap;
854 struct ieee80211_iface_combination if_combinations[NUM_IF_COMB];
855
856 /*
857 * Link quality
858 */
859 struct link link;
860
861 /*
862 * EEPROM data.
863 */
864 __le16 *eeprom;
865
866 /*
867 * Active RF register values.
868 * These are stored here so we don't need
869 * to read the rf registers and can directly
870 * use this value instead.
871 * This field should be accessed by using
872 * rt2x00_rf_read() and rt2x00_rf_write().
873 */
874 u32 *rf;
875
876 /*
877 * LNA gain
878 */
879 short lna_gain;
880
881 /*
882 * Current TX power value.
883 */
884 u16 tx_power;
885
886 /*
887 * Current retry values.
888 */
889 u8 short_retry;
890 u8 long_retry;
891
892 /*
893 * Rssi <-> Dbm offset
894 */
895 u8 rssi_offset;
896
897 /*
898 * Frequency offset.
899 */
900 u8 freq_offset;
901
902 /*
903 * Association id.
904 */
905 u16 aid;
906
907 /*
908 * Beacon interval.
909 */
910 u16 beacon_int;
911
912 /**
913 * Timestamp of last received beacon
914 */
915 unsigned long last_beacon;
916
917 /*
918 * Low level statistics which will have
919 * to be kept up to date while device is running.
920 */
921 struct ieee80211_low_level_stats low_level_stats;
922
923 /**
924 * Work queue for all work which should not be placed
925 * on the mac80211 workqueue (because of dependencies
926 * between various work structures).
927 */
928 struct workqueue_struct *workqueue;
929
930 /*
931 * Scheduled work.
932 * NOTE: intf_work will use ieee80211_iterate_active_interfaces()
933 * which means it cannot be placed on the hw->workqueue
934 * due to RTNL locking requirements.
935 */
936 struct work_struct intf_work;
937
938 /**
939 * Scheduled work for TX/RX done handling (USB devices)
940 */
941 struct work_struct rxdone_work;
942 struct work_struct txdone_work;
943
944 /*
945 * Powersaving work
946 */
947 struct delayed_work autowakeup_work;
948 struct work_struct sleep_work;
949
950 /*
951 * Data queue arrays for RX, TX, Beacon and ATIM.
952 */
953 unsigned int data_queues;
954 struct data_queue *rx;
955 struct data_queue *tx;
956 struct data_queue *bcn;
957 struct data_queue *atim;
958
959 /*
960 * Firmware image.
961 */
962 const struct firmware *fw;
963
964 /*
965 * FIFO for storing tx status reports between isr and tasklet.
966 */
967 DECLARE_KFIFO_PTR(txstatus_fifo, u32);
968
969 /*
970 * Timer to ensure tx status reports are read (rt2800usb).
971 */
972 struct hrtimer txstatus_timer;
973
974 /*
975 * Tasklet for processing tx status reports (rt2800pci).
976 */
977 struct tasklet_struct txstatus_tasklet;
978 struct tasklet_struct pretbtt_tasklet;
979 struct tasklet_struct tbtt_tasklet;
980 struct tasklet_struct rxdone_tasklet;
981 struct tasklet_struct autowake_tasklet;
982
983 /*
984 * Used for VCO periodic calibration.
985 */
986 int rf_channel;
987
988 /*
989 * Protect the interrupt mask register.
990 */
991 spinlock_t irqmask_lock;
992
993 /*
994 * List of BlockAckReq TX entries that need driver BlockAck processing.
995 */
996 struct list_head bar_list;
997 spinlock_t bar_list_lock;
998
999 /* Extra TX headroom required for alignment purposes. */
1000 unsigned int extra_tx_headroom;
1001};
1002
1003struct rt2x00_bar_list_entry {
1004 struct list_head list;
1005 struct rcu_head head;
1006
1007 struct queue_entry *entry;
1008 int block_acked;
1009
1010 /* Relevant parts of the IEEE80211 BAR header */
1011 __u8 ra[6];
1012 __u8 ta[6];
1013 __le16 control;
1014 __le16 start_seq_num;
1015};
1016
1017/*
1018 * Register defines.
1019 * Some registers require multiple attempts before success,
1020 * in those cases REGISTER_BUSY_COUNT attempts should be
1021 * taken with a REGISTER_BUSY_DELAY interval.
1022 */
1023#define REGISTER_BUSY_COUNT 100
1024#define REGISTER_BUSY_DELAY 100
1025
1026/*
1027 * Generic RF access.
1028 * The RF is being accessed by word index.
1029 */
1030static inline void rt2x00_rf_read(struct rt2x00_dev *rt2x00dev,
1031 const unsigned int word, u32 *data)
1032{
1033 BUG_ON(word < 1 || word > rt2x00dev->ops->rf_size / sizeof(u32));
1034 *data = rt2x00dev->rf[word - 1];
1035}
1036
1037static inline void rt2x00_rf_write(struct rt2x00_dev *rt2x00dev,
1038 const unsigned int word, u32 data)
1039{
1040 BUG_ON(word < 1 || word > rt2x00dev->ops->rf_size / sizeof(u32));
1041 rt2x00dev->rf[word - 1] = data;
1042}
1043
1044/*
1045 * Generic EEPROM access. The EEPROM is being accessed by word or byte index.
1046 */
1047static inline void *rt2x00_eeprom_addr(struct rt2x00_dev *rt2x00dev,
1048 const unsigned int word)
1049{
1050 return (void *)&rt2x00dev->eeprom[word];
1051}
1052
1053static inline void rt2x00_eeprom_read(struct rt2x00_dev *rt2x00dev,
1054 const unsigned int word, u16 *data)
1055{
1056 *data = le16_to_cpu(rt2x00dev->eeprom[word]);
1057}
1058
1059static inline void rt2x00_eeprom_write(struct rt2x00_dev *rt2x00dev,
1060 const unsigned int word, u16 data)
1061{
1062 rt2x00dev->eeprom[word] = cpu_to_le16(data);
1063}
1064
1065static inline u8 rt2x00_eeprom_byte(struct rt2x00_dev *rt2x00dev,
1066 const unsigned int byte)
1067{
1068 return *(((u8 *)rt2x00dev->eeprom) + byte);
1069}
1070
1071/*
1072 * Chipset handlers
1073 */
1074static inline void rt2x00_set_chip(struct rt2x00_dev *rt2x00dev,
1075 const u16 rt, const u16 rf, const u16 rev)
1076{
1077 rt2x00dev->chip.rt = rt;
1078 rt2x00dev->chip.rf = rf;
1079 rt2x00dev->chip.rev = rev;
1080
1081 rt2x00_info(rt2x00dev, "Chipset detected - rt: %04x, rf: %04x, rev: %04x\n",
1082 rt2x00dev->chip.rt, rt2x00dev->chip.rf,
1083 rt2x00dev->chip.rev);
1084}
1085
1086static inline void rt2x00_set_rt(struct rt2x00_dev *rt2x00dev,
1087 const u16 rt, const u16 rev)
1088{
1089 rt2x00dev->chip.rt = rt;
1090 rt2x00dev->chip.rev = rev;
1091
1092 rt2x00_info(rt2x00dev, "RT chipset %04x, rev %04x detected\n",
1093 rt2x00dev->chip.rt, rt2x00dev->chip.rev);
1094}
1095
1096static inline void rt2x00_set_rf(struct rt2x00_dev *rt2x00dev, const u16 rf)
1097{
1098 rt2x00dev->chip.rf = rf;
1099
1100 rt2x00_info(rt2x00dev, "RF chipset %04x detected\n",
1101 rt2x00dev->chip.rf);
1102}
1103
1104static inline bool rt2x00_rt(struct rt2x00_dev *rt2x00dev, const u16 rt)
1105{
1106 return (rt2x00dev->chip.rt == rt);
1107}
1108
1109static inline bool rt2x00_rf(struct rt2x00_dev *rt2x00dev, const u16 rf)
1110{
1111 return (rt2x00dev->chip.rf == rf);
1112}
1113
1114static inline u16 rt2x00_rev(struct rt2x00_dev *rt2x00dev)
1115{
1116 return rt2x00dev->chip.rev;
1117}
1118
1119static inline bool rt2x00_rt_rev(struct rt2x00_dev *rt2x00dev,
1120 const u16 rt, const u16 rev)
1121{
1122 return (rt2x00_rt(rt2x00dev, rt) && rt2x00_rev(rt2x00dev) == rev);
1123}
1124
1125static inline bool rt2x00_rt_rev_lt(struct rt2x00_dev *rt2x00dev,
1126 const u16 rt, const u16 rev)
1127{
1128 return (rt2x00_rt(rt2x00dev, rt) && rt2x00_rev(rt2x00dev) < rev);
1129}
1130
1131static inline bool rt2x00_rt_rev_gte(struct rt2x00_dev *rt2x00dev,
1132 const u16 rt, const u16 rev)
1133{
1134 return (rt2x00_rt(rt2x00dev, rt) && rt2x00_rev(rt2x00dev) >= rev);
1135}
1136
1137static inline void rt2x00_set_chip_intf(struct rt2x00_dev *rt2x00dev,
1138 enum rt2x00_chip_intf intf)
1139{
1140 rt2x00dev->chip.intf = intf;
1141}
1142
1143static inline bool rt2x00_intf(struct rt2x00_dev *rt2x00dev,
1144 enum rt2x00_chip_intf intf)
1145{
1146 return (rt2x00dev->chip.intf == intf);
1147}
1148
1149static inline bool rt2x00_is_pci(struct rt2x00_dev *rt2x00dev)
1150{
1151 return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_PCI) ||
1152 rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE);
1153}
1154
1155static inline bool rt2x00_is_pcie(struct rt2x00_dev *rt2x00dev)
1156{
1157 return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE);
1158}
1159
1160static inline bool rt2x00_is_usb(struct rt2x00_dev *rt2x00dev)
1161{
1162 return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_USB);
1163}
1164
1165static inline bool rt2x00_is_soc(struct rt2x00_dev *rt2x00dev)
1166{
1167 return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_SOC);
1168}
1169
1170/* Helpers for capability flags */
1171
1172static inline bool
1173rt2x00_has_cap_flag(struct rt2x00_dev *rt2x00dev,
1174 enum rt2x00_capability_flags cap_flag)
1175{
1176 return test_bit(cap_flag, &rt2x00dev->cap_flags);
1177}
1178
1179static inline bool
1180rt2x00_has_cap_hw_crypto(struct rt2x00_dev *rt2x00dev)
1181{
1182 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_HW_CRYPTO);
1183}
1184
1185static inline bool
1186rt2x00_has_cap_power_limit(struct rt2x00_dev *rt2x00dev)
1187{
1188 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_POWER_LIMIT);
1189}
1190
1191static inline bool
1192rt2x00_has_cap_control_filters(struct rt2x00_dev *rt2x00dev)
1193{
1194 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_CONTROL_FILTERS);
1195}
1196
1197static inline bool
1198rt2x00_has_cap_control_filter_pspoll(struct rt2x00_dev *rt2x00dev)
1199{
1200 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_CONTROL_FILTER_PSPOLL);
1201}
1202
1203static inline bool
1204rt2x00_has_cap_pre_tbtt_interrupt(struct rt2x00_dev *rt2x00dev)
1205{
1206 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_PRE_TBTT_INTERRUPT);
1207}
1208
1209static inline bool
1210rt2x00_has_cap_link_tuning(struct rt2x00_dev *rt2x00dev)
1211{
1212 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_LINK_TUNING);
1213}
1214
1215static inline bool
1216rt2x00_has_cap_frame_type(struct rt2x00_dev *rt2x00dev)
1217{
1218 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_FRAME_TYPE);
1219}
1220
1221static inline bool
1222rt2x00_has_cap_rf_sequence(struct rt2x00_dev *rt2x00dev)
1223{
1224 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_RF_SEQUENCE);
1225}
1226
1227static inline bool
1228rt2x00_has_cap_external_lna_a(struct rt2x00_dev *rt2x00dev)
1229{
1230 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_EXTERNAL_LNA_A);
1231}
1232
1233static inline bool
1234rt2x00_has_cap_external_lna_bg(struct rt2x00_dev *rt2x00dev)
1235{
1236 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_EXTERNAL_LNA_BG);
1237}
1238
1239static inline bool
1240rt2x00_has_cap_double_antenna(struct rt2x00_dev *rt2x00dev)
1241{
1242 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_DOUBLE_ANTENNA);
1243}
1244
1245static inline bool
1246rt2x00_has_cap_bt_coexist(struct rt2x00_dev *rt2x00dev)
1247{
1248 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_BT_COEXIST);
1249}
1250
1251static inline bool
1252rt2x00_has_cap_vco_recalibration(struct rt2x00_dev *rt2x00dev)
1253{
1254 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_VCO_RECALIBRATION);
1255}
1256
1257/**
1258 * rt2x00queue_map_txskb - Map a skb into DMA for TX purposes.
1259 * @entry: Pointer to &struct queue_entry
1260 *
1261 * Returns -ENOMEM if mapping fail, 0 otherwise.
1262 */
1263int rt2x00queue_map_txskb(struct queue_entry *entry);
1264
1265/**
1266 * rt2x00queue_unmap_skb - Unmap a skb from DMA.
1267 * @entry: Pointer to &struct queue_entry
1268 */
1269void rt2x00queue_unmap_skb(struct queue_entry *entry);
1270
1271/**
1272 * rt2x00queue_get_tx_queue - Convert tx queue index to queue pointer
1273 * @rt2x00dev: Pointer to &struct rt2x00_dev.
1274 * @queue: rt2x00 queue index (see &enum data_queue_qid).
1275 *
1276 * Returns NULL for non tx queues.
1277 */
1278static inline struct data_queue *
1279rt2x00queue_get_tx_queue(struct rt2x00_dev *rt2x00dev,
1280 const enum data_queue_qid queue)
1281{
1282 if (queue < rt2x00dev->ops->tx_queues && rt2x00dev->tx)
1283 return &rt2x00dev->tx[queue];
1284
1285 if (queue == QID_ATIM)
1286 return rt2x00dev->atim;
1287
1288 return NULL;
1289}
1290
1291/**
1292 * rt2x00queue_get_entry - Get queue entry where the given index points to.
1293 * @queue: Pointer to &struct data_queue from where we obtain the entry.
1294 * @index: Index identifier for obtaining the correct index.
1295 */
1296struct queue_entry *rt2x00queue_get_entry(struct data_queue *queue,
1297 enum queue_index index);
1298
1299/**
1300 * rt2x00queue_pause_queue - Pause a data queue
1301 * @queue: Pointer to &struct data_queue.
1302 *
1303 * This function will pause the data queue locally, preventing
1304 * new frames to be added to the queue (while the hardware is
1305 * still allowed to run).
1306 */
1307void rt2x00queue_pause_queue(struct data_queue *queue);
1308
1309/**
1310 * rt2x00queue_unpause_queue - unpause a data queue
1311 * @queue: Pointer to &struct data_queue.
1312 *
1313 * This function will unpause the data queue locally, allowing
1314 * new frames to be added to the queue again.
1315 */
1316void rt2x00queue_unpause_queue(struct data_queue *queue);
1317
1318/**
1319 * rt2x00queue_start_queue - Start a data queue
1320 * @queue: Pointer to &struct data_queue.
1321 *
1322 * This function will start handling all pending frames in the queue.
1323 */
1324void rt2x00queue_start_queue(struct data_queue *queue);
1325
1326/**
1327 * rt2x00queue_stop_queue - Halt a data queue
1328 * @queue: Pointer to &struct data_queue.
1329 *
1330 * This function will stop all pending frames in the queue.
1331 */
1332void rt2x00queue_stop_queue(struct data_queue *queue);
1333
1334/**
1335 * rt2x00queue_flush_queue - Flush a data queue
1336 * @queue: Pointer to &struct data_queue.
1337 * @drop: True to drop all pending frames.
1338 *
1339 * This function will flush the queue. After this call
1340 * the queue is guaranteed to be empty.
1341 */
1342void rt2x00queue_flush_queue(struct data_queue *queue, bool drop);
1343
1344/**
1345 * rt2x00queue_start_queues - Start all data queues
1346 * @rt2x00dev: Pointer to &struct rt2x00_dev.
1347 *
1348 * This function will loop through all available queues to start them
1349 */
1350void rt2x00queue_start_queues(struct rt2x00_dev *rt2x00dev);
1351
1352/**
1353 * rt2x00queue_stop_queues - Halt all data queues
1354 * @rt2x00dev: Pointer to &struct rt2x00_dev.
1355 *
1356 * This function will loop through all available queues to stop
1357 * any pending frames.
1358 */
1359void rt2x00queue_stop_queues(struct rt2x00_dev *rt2x00dev);
1360
1361/**
1362 * rt2x00queue_flush_queues - Flush all data queues
1363 * @rt2x00dev: Pointer to &struct rt2x00_dev.
1364 * @drop: True to drop all pending frames.
1365 *
1366 * This function will loop through all available queues to flush
1367 * any pending frames.
1368 */
1369void rt2x00queue_flush_queues(struct rt2x00_dev *rt2x00dev, bool drop);
1370
1371/*
1372 * Debugfs handlers.
1373 */
1374/**
1375 * rt2x00debug_dump_frame - Dump a frame to userspace through debugfs.
1376 * @rt2x00dev: Pointer to &struct rt2x00_dev.
1377 * @type: The type of frame that is being dumped.
1378 * @skb: The skb containing the frame to be dumped.
1379 */
1380#ifdef CONFIG_RT2X00_LIB_DEBUGFS
1381void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
1382 enum rt2x00_dump_type type, struct sk_buff *skb);
1383#else
1384static inline void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
1385 enum rt2x00_dump_type type,
1386 struct sk_buff *skb)
1387{
1388}
1389#endif /* CONFIG_RT2X00_LIB_DEBUGFS */
1390
1391/*
1392 * Utility functions.
1393 */
1394u32 rt2x00lib_get_bssidx(struct rt2x00_dev *rt2x00dev,
1395 struct ieee80211_vif *vif);
1396
1397/*
1398 * Interrupt context handlers.
1399 */
1400void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev);
1401void rt2x00lib_pretbtt(struct rt2x00_dev *rt2x00dev);
1402void rt2x00lib_dmastart(struct queue_entry *entry);
1403void rt2x00lib_dmadone(struct queue_entry *entry);
1404void rt2x00lib_txdone(struct queue_entry *entry,
1405 struct txdone_entry_desc *txdesc);
1406void rt2x00lib_txdone_noinfo(struct queue_entry *entry, u32 status);
1407void rt2x00lib_rxdone(struct queue_entry *entry, gfp_t gfp);
1408
1409/*
1410 * mac80211 handlers.
1411 */
1412void rt2x00mac_tx(struct ieee80211_hw *hw,
1413 struct ieee80211_tx_control *control,
1414 struct sk_buff *skb);
1415int rt2x00mac_start(struct ieee80211_hw *hw);
1416void rt2x00mac_stop(struct ieee80211_hw *hw);
1417int rt2x00mac_add_interface(struct ieee80211_hw *hw,
1418 struct ieee80211_vif *vif);
1419void rt2x00mac_remove_interface(struct ieee80211_hw *hw,
1420 struct ieee80211_vif *vif);
1421int rt2x00mac_config(struct ieee80211_hw *hw, u32 changed);
1422void rt2x00mac_configure_filter(struct ieee80211_hw *hw,
1423 unsigned int changed_flags,
1424 unsigned int *total_flags,
1425 u64 multicast);
1426int rt2x00mac_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
1427 bool set);
1428#ifdef CONFIG_RT2X00_LIB_CRYPTO
1429int rt2x00mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
1430 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
1431 struct ieee80211_key_conf *key);
1432#else
1433#define rt2x00mac_set_key NULL
1434#endif /* CONFIG_RT2X00_LIB_CRYPTO */
1435int rt2x00mac_sta_add(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1436 struct ieee80211_sta *sta);
1437int rt2x00mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1438 struct ieee80211_sta *sta);
1439void rt2x00mac_sw_scan_start(struct ieee80211_hw *hw);
1440void rt2x00mac_sw_scan_complete(struct ieee80211_hw *hw);
1441int rt2x00mac_get_stats(struct ieee80211_hw *hw,
1442 struct ieee80211_low_level_stats *stats);
1443void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw,
1444 struct ieee80211_vif *vif,
1445 struct ieee80211_bss_conf *bss_conf,
1446 u32 changes);
1447int rt2x00mac_conf_tx(struct ieee80211_hw *hw,
1448 struct ieee80211_vif *vif, u16 queue,
1449 const struct ieee80211_tx_queue_params *params);
1450void rt2x00mac_rfkill_poll(struct ieee80211_hw *hw);
1451void rt2x00mac_flush(struct ieee80211_hw *hw, u32 queues, bool drop);
1452int rt2x00mac_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant);
1453int rt2x00mac_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant);
1454void rt2x00mac_get_ringparam(struct ieee80211_hw *hw,
1455 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max);
1456bool rt2x00mac_tx_frames_pending(struct ieee80211_hw *hw);
1457
1458/*
1459 * Driver allocation handlers.
1460 */
1461int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev);
1462void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev);
1463#ifdef CONFIG_PM
1464int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state);
1465int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev);
1466#endif /* CONFIG_PM */
1467
1468#endif /* RT2X00_H */