1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 Copyright (C) 2010 Willow Garage <http://www.willowgarage.com>
4 Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com>
5 Copyright (C) 2004 - 2009 Gertjan van Wingerde <gwingerde@gmail.com>
6 <http://rt2x00.serialmonkey.com>
12 Abstract: rt2x00 global information.
18 #include <linux/bitops.h>
19 #include <linux/interrupt.h>
20 #include <linux/skbuff.h>
21 #include <linux/workqueue.h>
22 #include <linux/firmware.h>
23 #include <linux/leds.h>
24 #include <linux/mutex.h>
25 #include <linux/etherdevice.h>
26 #include <linux/kfifo.h>
27 #include <linux/hrtimer.h>
28 #include <linux/average.h>
29 #include <linux/usb.h>
30 #include <linux/clk.h>
32 #include <net/mac80211.h>
34 #include "rt2x00debug.h"
35 #include "rt2x00dump.h"
36 #include "rt2x00leds.h"
37 #include "rt2x00reg.h"
38 #include "rt2x00queue.h"
43 #define DRV_VERSION "2.3.0"
44 #define DRV_PROJECT "http://rt2x00.serialmonkey.com"
47 * Debug output has to be enabled during compile time.
49 #ifdef CONFIG_RT2X00_DEBUG
51 #endif /* CONFIG_RT2X00_DEBUG */
53 /* Utility printing macros
54 * rt2x00_probe_err is for messages when rt2x00_dev is uninitialized
56 #define rt2x00_probe_err(fmt, ...) \
57 printk(KERN_ERR KBUILD_MODNAME ": %s: Error - " fmt, \
58 __func__, ##__VA_ARGS__)
59 #define rt2x00_err(dev, fmt, ...) \
60 wiphy_err_ratelimited((dev)->hw->wiphy, "%s: Error - " fmt, \
61 __func__, ##__VA_ARGS__)
62 #define rt2x00_warn(dev, fmt, ...) \
63 wiphy_warn_ratelimited((dev)->hw->wiphy, "%s: Warning - " fmt, \
64 __func__, ##__VA_ARGS__)
65 #define rt2x00_info(dev, fmt, ...) \
66 wiphy_info((dev)->hw->wiphy, "%s: Info - " fmt, \
67 __func__, ##__VA_ARGS__)
69 /* Various debug levels */
70 #define rt2x00_dbg(dev, fmt, ...) \
71 wiphy_dbg((dev)->hw->wiphy, "%s: Debug - " fmt, \
72 __func__, ##__VA_ARGS__)
73 #define rt2x00_eeprom_dbg(dev, fmt, ...) \
74 wiphy_dbg((dev)->hw->wiphy, "%s: EEPROM recovery - " fmt, \
75 __func__, ##__VA_ARGS__)
78 * Duration calculations
79 * The rate variable passed is: 100kbs.
80 * To convert from bytes to bits we multiply size with 8,
81 * then the size is multiplied with 10 to make the
82 * real rate -> rate argument correction.
84 #define GET_DURATION(__size, __rate) (((__size) * 8 * 10) / (__rate))
85 #define GET_DURATION_RES(__size, __rate)(((__size) * 8 * 10) % (__rate))
88 * Determine the number of L2 padding bytes required between the header and
91 #define L2PAD_SIZE(__hdrlen) (-(__hdrlen) & 3)
94 * Determine the alignment requirement,
95 * to make sure the 802.11 payload is padded to a 4-byte boundrary
96 * we must determine the address of the payload and calculate the
97 * amount of bytes needed to move the data.
99 #define ALIGN_SIZE(__skb, __header) \
100 (((unsigned long)((__skb)->data + (__header))) & 3)
103 * Constants for extra TX headroom for alignment purposes.
105 #define RT2X00_ALIGN_SIZE 4 /* Only whole frame needs alignment */
106 #define RT2X00_L2PAD_SIZE 8 /* Both header & payload need alignment */
109 * Standard timing and size defines.
110 * These values should follow the ieee80211 specifications.
113 #define IEEE80211_HEADER 24
117 #define SHORT_PREAMBLE 72
119 #define SHORT_SLOT_TIME 9
121 #define PIFS (SIFS + SLOT_TIME)
122 #define SHORT_PIFS (SIFS + SHORT_SLOT_TIME)
123 #define DIFS (PIFS + SLOT_TIME)
124 #define SHORT_DIFS (SHORT_PIFS + SHORT_SLOT_TIME)
125 #define EIFS (SIFS + DIFS + \
126 GET_DURATION(IEEE80211_HEADER + ACK_SIZE, 10))
127 #define SHORT_EIFS (SIFS + SHORT_DIFS + \
128 GET_DURATION(IEEE80211_HEADER + ACK_SIZE, 10))
130 enum rt2x00_chip_intf {
131 RT2X00_CHIP_INTF_PCI,
132 RT2X00_CHIP_INTF_PCIE,
133 RT2X00_CHIP_INTF_USB,
134 RT2X00_CHIP_INTF_SOC,
138 * Chipset identification
139 * The chipset on the device is composed of a RT and RF chip.
140 * The chipset combination is important for determining device capabilities.
144 #define RT2460 0x2460
145 #define RT2560 0x2560
146 #define RT2570 0x2570
147 #define RT2661 0x2661
148 #define RT2573 0x2573
149 #define RT2860 0x2860 /* 2.4GHz */
150 #define RT2872 0x2872 /* WSOC */
151 #define RT2883 0x2883 /* WSOC */
152 #define RT3070 0x3070
153 #define RT3071 0x3071
154 #define RT3090 0x3090 /* 2.4GHz PCIe */
155 #define RT3290 0x3290
156 #define RT3352 0x3352 /* WSOC */
157 #define RT3390 0x3390
158 #define RT3572 0x3572
159 #define RT3593 0x3593
160 #define RT3883 0x3883 /* WSOC */
161 #define RT5350 0x5350 /* WSOC 2.4GHz */
162 #define RT5390 0x5390 /* 2.4GHz */
163 #define RT5392 0x5392 /* 2.4GHz */
164 #define RT5592 0x5592
165 #define RT6352 0x6352 /* WSOC 2.4GHz */
170 enum rt2x00_chip_intf intf;
174 * RF register values that belong to a particular channel.
185 * Information structure for channel survey.
187 struct rt2x00_chan_survey {
194 * Channel information structure
196 struct channel_info {
198 #define GEOGRAPHY_ALLOWED 0x00000001
201 short default_power1;
202 short default_power2;
203 short default_power3;
207 * Antenna setup values.
209 struct antenna_setup {
217 * Quality statistics about the currently active link.
221 * Statistics required for Link tuning by driver
222 * The rssi value is provided by rt2x00lib during the
223 * link_tuner() callback function.
224 * The false_cca field is filled during the link_stats()
225 * callback function and could be used during the
226 * link_tuner() callback function.
233 * Hardware driver will tune the VGC level during each call
234 * to the link_tuner() callback function. This vgc_level is
235 * determined based on the link quality statistics like
236 * average RSSI and the false CCA count.
238 * In some cases the drivers need to differentiate between
239 * the currently "desired" VGC level and the level configured
240 * in the hardware. The latter is important to reduce the
241 * number of BBP register reads to reduce register access
242 * overhead. For this reason we store both values here.
248 * Statistics required for Signal quality calculation.
249 * These fields might be changed during the link_stats()
258 DECLARE_EWMA(rssi, 10, 8)
261 * Antenna settings about the currently active link.
268 #define ANTENNA_RX_DIVERSITY 0x00000001
269 #define ANTENNA_TX_DIVERSITY 0x00000002
270 #define ANTENNA_MODE_SAMPLE 0x00000004
273 * Currently active TX/RX antenna setup.
274 * When software diversity is used, this will indicate
275 * which antenna is actually used at this time.
277 struct antenna_setup active;
280 * RSSI history information for the antenna.
281 * Used to determine when to switch antenna
282 * when using software diversity.
287 * Current RSSI average of the currently active antenna.
288 * Similar to the avg_rssi in the link_qual structure
289 * this value is updated by using the walking average.
291 struct ewma_rssi rssi_ant;
295 * To optimize the quality of the link we need to store
296 * the quality of received frames and periodically
302 * The number of times the link has been tuned
303 * since the radio has been switched on.
308 * Quality measurement values.
310 struct link_qual qual;
313 * TX/RX antenna setup.
318 * Currently active average RSSI value
320 struct ewma_rssi avg_rssi;
323 * Work structure for scheduling periodic link tuning.
325 struct delayed_work work;
328 * Work structure for scheduling periodic watchdog monitoring.
329 * This work must be scheduled on the kernel workqueue, while
330 * all other work structures must be queued on the mac80211
331 * workqueue. This guarantees that the watchdog can schedule
332 * other work structures and wait for their completion in order
333 * to bring the device/driver back into the desired state.
335 struct delayed_work watchdog_work;
336 unsigned int watchdog_interval;
337 unsigned int watchdog;
340 * Work structure for scheduling periodic AGC adjustments.
342 struct delayed_work agc_work;
345 * Work structure for scheduling periodic VCO calibration.
347 struct delayed_work vco_work;
350 enum rt2x00_delayed_flags {
351 DELAYED_UPDATE_BEACON,
355 * Interface structure
356 * Per interface configuration details, this structure
357 * is allocated as the private data for ieee80211_vif.
361 * beacon->skb must be protected with the mutex.
363 struct mutex beacon_skb_mutex;
366 * Entry in the beacon queue which belongs to
367 * this interface. Each interface has its own
368 * dedicated beacon entry.
370 struct queue_entry *beacon;
374 * Actions that needed rescheduling.
376 unsigned long delayed_flags;
379 * Software sequence counter, this is only required
380 * for hardware which doesn't support hardware
386 static inline struct rt2x00_intf* vif_to_intf(struct ieee80211_vif *vif)
388 return (struct rt2x00_intf *)vif->drv_priv;
392 * struct hw_mode_spec: Hardware specifications structure
394 * Details about the supported modes, rates and channels
395 * of a particular chipset. This is used by rt2x00lib
396 * to build the ieee80211_hw_mode array for mac80211.
398 * @supported_bands: Bitmask contained the supported bands (2.4GHz, 5.2GHz).
399 * @supported_rates: Rate types which are supported (CCK, OFDM).
400 * @num_channels: Number of supported channels. This is used as array size
401 * for @tx_power_a, @tx_power_bg and @channels.
402 * @channels: Device/chipset specific channel values (See &struct rf_channel).
403 * @channels_info: Additional information for channels (See &struct channel_info).
404 * @ht: Driver HT Capabilities (See &ieee80211_sta_ht_cap).
406 struct hw_mode_spec {
407 unsigned int supported_bands;
408 #define SUPPORT_BAND_2GHZ 0x00000001
409 #define SUPPORT_BAND_5GHZ 0x00000002
411 unsigned int supported_rates;
412 #define SUPPORT_RATE_CCK 0x00000001
413 #define SUPPORT_RATE_OFDM 0x00000002
415 unsigned int num_channels;
416 const struct rf_channel *channels;
417 const struct channel_info *channels_info;
419 struct ieee80211_sta_ht_cap ht;
423 * Configuration structure wrapper around the
424 * mac80211 configuration structure.
425 * When mac80211 configures the driver, rt2x00lib
426 * can precalculate values which are equal for all
427 * rt2x00 drivers. Those values can be stored in here.
429 struct rt2x00lib_conf {
430 struct ieee80211_conf *conf;
432 struct rf_channel rf;
433 struct channel_info channel;
437 * Configuration structure for erp settings.
439 struct rt2x00lib_erp {
457 * Configuration structure for hardware encryption.
459 struct rt2x00lib_crypto {
462 enum set_key_cmd cmd;
475 * Configuration structure wrapper around the
476 * rt2x00 interface configuration handler.
478 struct rt2x00intf_conf {
482 enum nl80211_iftype type;
485 * TSF sync value, this is dependent on the operation type.
490 * The MAC and BSSID addresses are simple array of bytes,
491 * these arrays are little endian, so when sending the addresses
492 * to the drivers, copy the it into a endian-signed variable.
494 * Note that all devices (except rt2500usb) have 32 bits
495 * register word sizes. This means that whatever variable we
496 * pass _must_ be a multiple of 32 bits. Otherwise the device
497 * might not accept what we are sending to it.
498 * This will also make it easier for the driver to write
499 * the data to the device.
506 * Private structure for storing STA details
507 * wcid: Wireless Client ID
513 static inline struct rt2x00_sta* sta_to_rt2x00_sta(struct ieee80211_sta *sta)
515 return (struct rt2x00_sta *)sta->drv_priv;
519 * rt2x00lib callback functions.
521 struct rt2x00lib_ops {
523 * Interrupt handlers.
525 irq_handler_t irq_handler;
528 * TX status tasklet handler.
530 void (*txstatus_tasklet) (struct tasklet_struct *t);
531 void (*pretbtt_tasklet) (struct tasklet_struct *t);
532 void (*tbtt_tasklet) (struct tasklet_struct *t);
533 void (*rxdone_tasklet) (struct tasklet_struct *t);
534 void (*autowake_tasklet) (struct tasklet_struct *t);
537 * Device init handlers.
539 int (*probe_hw) (struct rt2x00_dev *rt2x00dev);
540 char *(*get_firmware_name) (struct rt2x00_dev *rt2x00dev);
541 int (*check_firmware) (struct rt2x00_dev *rt2x00dev,
542 const u8 *data, const size_t len);
543 int (*load_firmware) (struct rt2x00_dev *rt2x00dev,
544 const u8 *data, const size_t len);
547 * Device initialization/deinitialization handlers.
549 int (*initialize) (struct rt2x00_dev *rt2x00dev);
550 void (*uninitialize) (struct rt2x00_dev *rt2x00dev);
553 * queue initialization handlers
555 bool (*get_entry_state) (struct queue_entry *entry);
556 void (*clear_entry) (struct queue_entry *entry);
559 * Radio control handlers.
561 int (*set_device_state) (struct rt2x00_dev *rt2x00dev,
562 enum dev_state state);
563 int (*rfkill_poll) (struct rt2x00_dev *rt2x00dev);
564 void (*link_stats) (struct rt2x00_dev *rt2x00dev,
565 struct link_qual *qual);
566 void (*reset_tuner) (struct rt2x00_dev *rt2x00dev,
567 struct link_qual *qual);
568 void (*link_tuner) (struct rt2x00_dev *rt2x00dev,
569 struct link_qual *qual, const u32 count);
570 void (*gain_calibration) (struct rt2x00_dev *rt2x00dev);
571 void (*vco_calibration) (struct rt2x00_dev *rt2x00dev);
574 * Data queue handlers.
576 void (*watchdog) (struct rt2x00_dev *rt2x00dev);
577 void (*start_queue) (struct data_queue *queue);
578 void (*kick_queue) (struct data_queue *queue);
579 void (*stop_queue) (struct data_queue *queue);
580 void (*flush_queue) (struct data_queue *queue, bool drop);
581 void (*tx_dma_done) (struct queue_entry *entry);
584 * TX control handlers
586 void (*write_tx_desc) (struct queue_entry *entry,
587 struct txentry_desc *txdesc);
588 void (*write_tx_data) (struct queue_entry *entry,
589 struct txentry_desc *txdesc);
590 void (*write_beacon) (struct queue_entry *entry,
591 struct txentry_desc *txdesc);
592 void (*clear_beacon) (struct queue_entry *entry);
593 int (*get_tx_data_len) (struct queue_entry *entry);
596 * RX control handlers
598 void (*fill_rxdone) (struct queue_entry *entry,
599 struct rxdone_entry_desc *rxdesc);
602 * Configuration handlers.
604 int (*config_shared_key) (struct rt2x00_dev *rt2x00dev,
605 struct rt2x00lib_crypto *crypto,
606 struct ieee80211_key_conf *key);
607 int (*config_pairwise_key) (struct rt2x00_dev *rt2x00dev,
608 struct rt2x00lib_crypto *crypto,
609 struct ieee80211_key_conf *key);
610 void (*config_filter) (struct rt2x00_dev *rt2x00dev,
611 const unsigned int filter_flags);
612 void (*config_intf) (struct rt2x00_dev *rt2x00dev,
613 struct rt2x00_intf *intf,
614 struct rt2x00intf_conf *conf,
615 const unsigned int flags);
616 #define CONFIG_UPDATE_TYPE ( 1 << 1 )
617 #define CONFIG_UPDATE_MAC ( 1 << 2 )
618 #define CONFIG_UPDATE_BSSID ( 1 << 3 )
620 void (*config_erp) (struct rt2x00_dev *rt2x00dev,
621 struct rt2x00lib_erp *erp,
623 void (*config_ant) (struct rt2x00_dev *rt2x00dev,
624 struct antenna_setup *ant);
625 void (*config) (struct rt2x00_dev *rt2x00dev,
626 struct rt2x00lib_conf *libconf,
627 const unsigned int changed_flags);
628 void (*pre_reset_hw) (struct rt2x00_dev *rt2x00dev);
629 int (*sta_add) (struct rt2x00_dev *rt2x00dev,
630 struct ieee80211_vif *vif,
631 struct ieee80211_sta *sta);
632 int (*sta_remove) (struct rt2x00_dev *rt2x00dev,
633 struct ieee80211_sta *sta);
637 * rt2x00 driver callback operation structure.
641 const unsigned int drv_data_size;
642 const unsigned int max_ap_intf;
643 const unsigned int eeprom_size;
644 const unsigned int rf_size;
645 const unsigned int tx_queues;
646 void (*queue_init)(struct data_queue *queue);
647 const struct rt2x00lib_ops *lib;
649 const struct ieee80211_ops *hw;
650 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
651 const struct rt2x00debug *debugfs;
652 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
658 enum rt2x00_state_flags {
662 DEVICE_STATE_PRESENT,
663 DEVICE_STATE_REGISTERED_HW,
664 DEVICE_STATE_INITIALIZED,
665 DEVICE_STATE_STARTED,
666 DEVICE_STATE_ENABLED_RADIO,
667 DEVICE_STATE_SCANNING,
668 DEVICE_STATE_FLUSHING,
672 * Driver configuration
680 * Mark we currently are sequentially reading TX_STA_FIFO register
681 * FIXME: this is for only rt2800usb, should go to private data
687 * rt2x00 capability flags
689 enum rt2x00_capability_flags {
694 REQUIRE_BEACON_GUARD,
699 REQUIRE_TXSTATUS_FIFO,
700 REQUIRE_TASKLET_CONTEXT,
704 REQUIRE_DELAYED_RFKILL,
709 CAPABILITY_HW_BUTTON,
710 CAPABILITY_HW_CRYPTO,
711 CAPABILITY_POWER_LIMIT,
712 CAPABILITY_CONTROL_FILTERS,
713 CAPABILITY_CONTROL_FILTER_PSPOLL,
714 CAPABILITY_PRE_TBTT_INTERRUPT,
715 CAPABILITY_LINK_TUNING,
716 CAPABILITY_FRAME_TYPE,
717 CAPABILITY_RF_SEQUENCE,
718 CAPABILITY_EXTERNAL_LNA_A,
719 CAPABILITY_EXTERNAL_LNA_BG,
720 CAPABILITY_DOUBLE_ANTENNA,
721 CAPABILITY_BT_COEXIST,
722 CAPABILITY_VCO_RECALIBRATION,
723 CAPABILITY_EXTERNAL_PA_TX0,
724 CAPABILITY_EXTERNAL_PA_TX1,
725 CAPABILITY_RESTART_HW,
729 * Interface combinations
737 * rt2x00 device structure.
742 * The structure stored in here depends on the
743 * system bus (PCI or USB).
744 * When accessing this variable, the rt2x00dev_{pci,usb}
745 * macros should be used for correct typecasting.
750 * Callback functions.
752 const struct rt2x00_ops *ops;
760 * IEEE80211 control structure.
762 struct ieee80211_hw *hw;
763 struct ieee80211_supported_band bands[NUM_NL80211_BANDS];
764 struct rt2x00_chan_survey *chan_survey;
765 enum nl80211_band curr_band;
769 * If enabled, the debugfs interface structures
770 * required for deregistration of debugfs.
772 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
773 struct rt2x00debug_intf *debugfs_intf;
774 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
777 * LED structure for changing the LED status
778 * by mac8011 or the kernel.
780 #ifdef CONFIG_RT2X00_LIB_LEDS
781 struct rt2x00_led led_radio;
782 struct rt2x00_led led_assoc;
783 struct rt2x00_led led_qual;
785 #endif /* CONFIG_RT2X00_LIB_LEDS */
788 * Device state flags.
789 * In these flags the current status is stored.
790 * Access to these flags should occur atomically.
795 * Device capabiltiy flags.
796 * In these flags the device/driver capabilities are stored.
797 * Access to these flags should occur non-atomically.
799 unsigned long cap_flags;
802 * Device information, Bus IRQ and name (PCI, SoC)
808 * Chipset identification.
810 struct rt2x00_chip chip;
813 * hw capability specifications.
815 struct hw_mode_spec spec;
818 * This is the default TX/RX antenna setup as indicated
819 * by the device's EEPROM.
821 struct antenna_setup default_ant;
825 * csr.base: CSR base register address. (PCI)
826 * csr.cache: CSR cache for usb_control_msg. (USB)
834 * Mutex to protect register accesses.
835 * For PCI and USB devices it protects against concurrent indirect
836 * register access (BBP, RF, MCU) since accessing those
837 * registers require multiple calls to the CSR registers.
838 * For USB devices it also protects the csr_cache since that
839 * field is used for normal CSR access and it cannot support
840 * multiple callers simultaneously.
842 struct mutex csr_mutex;
845 * Mutex to synchronize config and link tuner.
847 struct mutex conf_mutex;
849 * Current packet filter configuration for the device.
850 * This contains all currently active FIF_* flags send
851 * to us by mac80211 during configure_filter().
853 unsigned int packet_filter;
857 * - Open ap interface count.
858 * - Open sta interface count.
859 * - Association count.
860 * - Beaconing enabled count.
862 unsigned int intf_ap_count;
863 unsigned int intf_sta_count;
864 unsigned int intf_associated;
865 unsigned int intf_beaconing;
868 * Interface combinations
870 struct ieee80211_iface_limit if_limits_ap;
871 struct ieee80211_iface_combination if_combinations[NUM_IF_COMB];
884 * Active RF register values.
885 * These are stored here so we don't need
886 * to read the rf registers and can directly
887 * use this value instead.
888 * This field should be accessed by using
889 * rt2x00_rf_read() and rt2x00_rf_write().
899 * Current TX power value.
904 * Current retry values.
910 * Rssi <-> Dbm offset
929 /* Rx/Tx DMA busy watchdog counter */
930 u16 rxdma_busy, txdma_busy;
933 * Timestamp of last received beacon
935 unsigned long last_beacon;
938 * Low level statistics which will have
939 * to be kept up to date while device is running.
941 struct ieee80211_low_level_stats low_level_stats;
944 * Work queue for all work which should not be placed
945 * on the mac80211 workqueue (because of dependencies
946 * between various work structures).
948 struct workqueue_struct *workqueue;
952 * NOTE: intf_work will use ieee80211_iterate_active_interfaces()
953 * which means it cannot be placed on the hw->workqueue
954 * due to RTNL locking requirements.
956 struct work_struct intf_work;
959 * Scheduled work for TX/RX done handling (USB devices)
961 struct work_struct rxdone_work;
962 struct work_struct txdone_work;
967 struct delayed_work autowakeup_work;
968 struct work_struct sleep_work;
971 * Data queue arrays for RX, TX, Beacon and ATIM.
973 unsigned int data_queues;
974 struct data_queue *rx;
975 struct data_queue *tx;
976 struct data_queue *bcn;
977 struct data_queue *atim;
982 const struct firmware *fw;
985 * FIFO for storing tx status reports between isr and tasklet.
987 DECLARE_KFIFO_PTR(txstatus_fifo, u32);
990 * Timer to ensure tx status reports are read (rt2800usb).
992 struct hrtimer txstatus_timer;
995 * Tasklet for processing tx status reports (rt2800pci).
997 struct tasklet_struct txstatus_tasklet;
998 struct tasklet_struct pretbtt_tasklet;
999 struct tasklet_struct tbtt_tasklet;
1000 struct tasklet_struct rxdone_tasklet;
1001 struct tasklet_struct autowake_tasklet;
1004 * Used for VCO periodic calibration.
1009 * Protect the interrupt mask register.
1011 spinlock_t irqmask_lock;
1014 * List of BlockAckReq TX entries that need driver BlockAck processing.
1016 struct list_head bar_list;
1017 spinlock_t bar_list_lock;
1019 /* Extra TX headroom required for alignment purposes. */
1020 unsigned int extra_tx_headroom;
1022 struct usb_anchor *anchor;
1023 unsigned int num_proto_errs;
1025 /* Clock for System On Chip devices. */
1029 struct rt2x00_bar_list_entry {
1030 struct list_head list;
1031 struct rcu_head head;
1033 struct queue_entry *entry;
1036 /* Relevant parts of the IEEE80211 BAR header */
1040 __le16 start_seq_num;
1045 * Some registers require multiple attempts before success,
1046 * in those cases REGISTER_BUSY_COUNT attempts should be
1047 * taken with a REGISTER_BUSY_DELAY interval. Due to USB
1048 * bus delays, we do not have to loop so many times to wait
1049 * for valid register value on that bus.
1051 #define REGISTER_BUSY_COUNT 100
1052 #define REGISTER_USB_BUSY_COUNT 20
1053 #define REGISTER_BUSY_DELAY 100
1056 * Generic RF access.
1057 * The RF is being accessed by word index.
1059 static inline u32 rt2x00_rf_read(struct rt2x00_dev *rt2x00dev,
1060 const unsigned int word)
1062 BUG_ON(word < 1 || word > rt2x00dev->ops->rf_size / sizeof(u32));
1063 return rt2x00dev->rf[word - 1];
1066 static inline void rt2x00_rf_write(struct rt2x00_dev *rt2x00dev,
1067 const unsigned int word, u32 data)
1069 BUG_ON(word < 1 || word > rt2x00dev->ops->rf_size / sizeof(u32));
1070 rt2x00dev->rf[word - 1] = data;
1074 * Generic EEPROM access. The EEPROM is being accessed by word or byte index.
1076 static inline void *rt2x00_eeprom_addr(struct rt2x00_dev *rt2x00dev,
1077 const unsigned int word)
1079 return (void *)&rt2x00dev->eeprom[word];
1082 static inline u16 rt2x00_eeprom_read(struct rt2x00_dev *rt2x00dev,
1083 const unsigned int word)
1085 return le16_to_cpu(rt2x00dev->eeprom[word]);
1088 static inline void rt2x00_eeprom_write(struct rt2x00_dev *rt2x00dev,
1089 const unsigned int word, u16 data)
1091 rt2x00dev->eeprom[word] = cpu_to_le16(data);
1094 static inline u8 rt2x00_eeprom_byte(struct rt2x00_dev *rt2x00dev,
1095 const unsigned int byte)
1097 return *(((u8 *)rt2x00dev->eeprom) + byte);
1103 static inline void rt2x00_set_chip(struct rt2x00_dev *rt2x00dev,
1104 const u16 rt, const u16 rf, const u16 rev)
1106 rt2x00dev->chip.rt = rt;
1107 rt2x00dev->chip.rf = rf;
1108 rt2x00dev->chip.rev = rev;
1110 rt2x00_info(rt2x00dev, "Chipset detected - rt: %04x, rf: %04x, rev: %04x\n",
1111 rt2x00dev->chip.rt, rt2x00dev->chip.rf,
1112 rt2x00dev->chip.rev);
1115 static inline void rt2x00_set_rt(struct rt2x00_dev *rt2x00dev,
1116 const u16 rt, const u16 rev)
1118 rt2x00dev->chip.rt = rt;
1119 rt2x00dev->chip.rev = rev;
1121 rt2x00_info(rt2x00dev, "RT chipset %04x, rev %04x detected\n",
1122 rt2x00dev->chip.rt, rt2x00dev->chip.rev);
1125 static inline void rt2x00_set_rf(struct rt2x00_dev *rt2x00dev, const u16 rf)
1127 rt2x00dev->chip.rf = rf;
1129 rt2x00_info(rt2x00dev, "RF chipset %04x detected\n",
1130 rt2x00dev->chip.rf);
1133 static inline bool rt2x00_rt(struct rt2x00_dev *rt2x00dev, const u16 rt)
1135 return (rt2x00dev->chip.rt == rt);
1138 static inline bool rt2x00_rf(struct rt2x00_dev *rt2x00dev, const u16 rf)
1140 return (rt2x00dev->chip.rf == rf);
1143 static inline u16 rt2x00_rev(struct rt2x00_dev *rt2x00dev)
1145 return rt2x00dev->chip.rev;
1148 static inline bool rt2x00_rt_rev(struct rt2x00_dev *rt2x00dev,
1149 const u16 rt, const u16 rev)
1151 return (rt2x00_rt(rt2x00dev, rt) && rt2x00_rev(rt2x00dev) == rev);
1154 static inline bool rt2x00_rt_rev_lt(struct rt2x00_dev *rt2x00dev,
1155 const u16 rt, const u16 rev)
1157 return (rt2x00_rt(rt2x00dev, rt) && rt2x00_rev(rt2x00dev) < rev);
1160 static inline bool rt2x00_rt_rev_gte(struct rt2x00_dev *rt2x00dev,
1161 const u16 rt, const u16 rev)
1163 return (rt2x00_rt(rt2x00dev, rt) && rt2x00_rev(rt2x00dev) >= rev);
1166 static inline void rt2x00_set_chip_intf(struct rt2x00_dev *rt2x00dev,
1167 enum rt2x00_chip_intf intf)
1169 rt2x00dev->chip.intf = intf;
1172 static inline bool rt2x00_intf(struct rt2x00_dev *rt2x00dev,
1173 enum rt2x00_chip_intf intf)
1175 return (rt2x00dev->chip.intf == intf);
1178 static inline bool rt2x00_is_pci(struct rt2x00_dev *rt2x00dev)
1180 return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_PCI) ||
1181 rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE);
1184 static inline bool rt2x00_is_pcie(struct rt2x00_dev *rt2x00dev)
1186 return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE);
1189 static inline bool rt2x00_is_usb(struct rt2x00_dev *rt2x00dev)
1191 return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_USB);
1194 static inline bool rt2x00_is_soc(struct rt2x00_dev *rt2x00dev)
1196 return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_SOC);
1199 /* Helpers for capability flags */
1202 rt2x00_has_cap_flag(struct rt2x00_dev *rt2x00dev,
1203 enum rt2x00_capability_flags cap_flag)
1205 return test_bit(cap_flag, &rt2x00dev->cap_flags);
1209 rt2x00_has_cap_hw_crypto(struct rt2x00_dev *rt2x00dev)
1211 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_HW_CRYPTO);
1215 rt2x00_has_cap_power_limit(struct rt2x00_dev *rt2x00dev)
1217 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_POWER_LIMIT);
1221 rt2x00_has_cap_control_filters(struct rt2x00_dev *rt2x00dev)
1223 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_CONTROL_FILTERS);
1227 rt2x00_has_cap_control_filter_pspoll(struct rt2x00_dev *rt2x00dev)
1229 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_CONTROL_FILTER_PSPOLL);
1233 rt2x00_has_cap_pre_tbtt_interrupt(struct rt2x00_dev *rt2x00dev)
1235 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_PRE_TBTT_INTERRUPT);
1239 rt2x00_has_cap_link_tuning(struct rt2x00_dev *rt2x00dev)
1241 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_LINK_TUNING);
1245 rt2x00_has_cap_frame_type(struct rt2x00_dev *rt2x00dev)
1247 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_FRAME_TYPE);
1251 rt2x00_has_cap_rf_sequence(struct rt2x00_dev *rt2x00dev)
1253 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_RF_SEQUENCE);
1257 rt2x00_has_cap_external_lna_a(struct rt2x00_dev *rt2x00dev)
1259 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_EXTERNAL_LNA_A);
1263 rt2x00_has_cap_external_lna_bg(struct rt2x00_dev *rt2x00dev)
1265 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_EXTERNAL_LNA_BG);
1269 rt2x00_has_cap_external_pa(struct rt2x00_dev *rt2x00dev)
1271 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_EXTERNAL_PA_TX0);
1275 rt2x00_has_cap_double_antenna(struct rt2x00_dev *rt2x00dev)
1277 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_DOUBLE_ANTENNA);
1281 rt2x00_has_cap_bt_coexist(struct rt2x00_dev *rt2x00dev)
1283 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_BT_COEXIST);
1287 rt2x00_has_cap_vco_recalibration(struct rt2x00_dev *rt2x00dev)
1289 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_VCO_RECALIBRATION);
1293 rt2x00_has_cap_restart_hw(struct rt2x00_dev *rt2x00dev)
1295 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_RESTART_HW);
1299 * rt2x00queue_map_txskb - Map a skb into DMA for TX purposes.
1300 * @entry: Pointer to &struct queue_entry
1302 * Returns -ENOMEM if mapping fail, 0 otherwise.
1304 int rt2x00queue_map_txskb(struct queue_entry *entry);
1307 * rt2x00queue_unmap_skb - Unmap a skb from DMA.
1308 * @entry: Pointer to &struct queue_entry
1310 void rt2x00queue_unmap_skb(struct queue_entry *entry);
1313 * rt2x00queue_get_tx_queue - Convert tx queue index to queue pointer
1314 * @rt2x00dev: Pointer to &struct rt2x00_dev.
1315 * @queue: rt2x00 queue index (see &enum data_queue_qid).
1317 * Returns NULL for non tx queues.
1319 static inline struct data_queue *
1320 rt2x00queue_get_tx_queue(struct rt2x00_dev *rt2x00dev,
1321 enum data_queue_qid queue)
1323 if (queue >= rt2x00dev->ops->tx_queues && queue < IEEE80211_NUM_ACS)
1324 queue = rt2x00dev->ops->tx_queues - 1;
1326 if (queue < rt2x00dev->ops->tx_queues && rt2x00dev->tx)
1327 return &rt2x00dev->tx[queue];
1329 if (queue == QID_ATIM)
1330 return rt2x00dev->atim;
1336 * rt2x00queue_get_entry - Get queue entry where the given index points to.
1337 * @queue: Pointer to &struct data_queue from where we obtain the entry.
1338 * @index: Index identifier for obtaining the correct index.
1340 struct queue_entry *rt2x00queue_get_entry(struct data_queue *queue,
1341 enum queue_index index);
1344 * rt2x00queue_pause_queue - Pause a data queue
1345 * @queue: Pointer to &struct data_queue.
1347 * This function will pause the data queue locally, preventing
1348 * new frames to be added to the queue (while the hardware is
1349 * still allowed to run).
1351 void rt2x00queue_pause_queue(struct data_queue *queue);
1354 * rt2x00queue_unpause_queue - unpause a data queue
1355 * @queue: Pointer to &struct data_queue.
1357 * This function will unpause the data queue locally, allowing
1358 * new frames to be added to the queue again.
1360 void rt2x00queue_unpause_queue(struct data_queue *queue);
1363 * rt2x00queue_start_queue - Start a data queue
1364 * @queue: Pointer to &struct data_queue.
1366 * This function will start handling all pending frames in the queue.
1368 void rt2x00queue_start_queue(struct data_queue *queue);
1371 * rt2x00queue_stop_queue - Halt a data queue
1372 * @queue: Pointer to &struct data_queue.
1374 * This function will stop all pending frames in the queue.
1376 void rt2x00queue_stop_queue(struct data_queue *queue);
1379 * rt2x00queue_flush_queue - Flush a data queue
1380 * @queue: Pointer to &struct data_queue.
1381 * @drop: True to drop all pending frames.
1383 * This function will flush the queue. After this call
1384 * the queue is guaranteed to be empty.
1386 void rt2x00queue_flush_queue(struct data_queue *queue, bool drop);
1389 * rt2x00queue_start_queues - Start all data queues
1390 * @rt2x00dev: Pointer to &struct rt2x00_dev.
1392 * This function will loop through all available queues to start them
1394 void rt2x00queue_start_queues(struct rt2x00_dev *rt2x00dev);
1397 * rt2x00queue_stop_queues - Halt all data queues
1398 * @rt2x00dev: Pointer to &struct rt2x00_dev.
1400 * This function will loop through all available queues to stop
1401 * any pending frames.
1403 void rt2x00queue_stop_queues(struct rt2x00_dev *rt2x00dev);
1406 * rt2x00queue_flush_queues - Flush all data queues
1407 * @rt2x00dev: Pointer to &struct rt2x00_dev.
1408 * @drop: True to drop all pending frames.
1410 * This function will loop through all available queues to flush
1411 * any pending frames.
1413 void rt2x00queue_flush_queues(struct rt2x00_dev *rt2x00dev, bool drop);
1419 * rt2x00debug_dump_frame - Dump a frame to userspace through debugfs.
1420 * @rt2x00dev: Pointer to &struct rt2x00_dev.
1421 * @type: The type of frame that is being dumped.
1422 * @entry: The queue entry containing the frame to be dumped.
1424 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
1425 void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
1426 enum rt2x00_dump_type type, struct queue_entry *entry);
1428 static inline void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
1429 enum rt2x00_dump_type type,
1430 struct queue_entry *entry)
1433 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
1436 * Utility functions.
1438 u32 rt2x00lib_get_bssidx(struct rt2x00_dev *rt2x00dev,
1439 struct ieee80211_vif *vif);
1440 void rt2x00lib_set_mac_address(struct rt2x00_dev *rt2x00dev, u8 *eeprom_mac_addr);
1443 * Interrupt context handlers.
1445 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev);
1446 void rt2x00lib_pretbtt(struct rt2x00_dev *rt2x00dev);
1447 void rt2x00lib_dmastart(struct queue_entry *entry);
1448 void rt2x00lib_dmadone(struct queue_entry *entry);
1449 void rt2x00lib_txdone(struct queue_entry *entry,
1450 struct txdone_entry_desc *txdesc);
1451 void rt2x00lib_txdone_nomatch(struct queue_entry *entry,
1452 struct txdone_entry_desc *txdesc);
1453 void rt2x00lib_txdone_noinfo(struct queue_entry *entry, u32 status);
1454 void rt2x00lib_rxdone(struct queue_entry *entry, gfp_t gfp);
1457 * mac80211 handlers.
1459 void rt2x00mac_tx(struct ieee80211_hw *hw,
1460 struct ieee80211_tx_control *control,
1461 struct sk_buff *skb);
1462 int rt2x00mac_start(struct ieee80211_hw *hw);
1463 void rt2x00mac_stop(struct ieee80211_hw *hw);
1464 void rt2x00mac_reconfig_complete(struct ieee80211_hw *hw,
1465 enum ieee80211_reconfig_type reconfig_type);
1466 int rt2x00mac_add_interface(struct ieee80211_hw *hw,
1467 struct ieee80211_vif *vif);
1468 void rt2x00mac_remove_interface(struct ieee80211_hw *hw,
1469 struct ieee80211_vif *vif);
1470 int rt2x00mac_config(struct ieee80211_hw *hw, u32 changed);
1471 void rt2x00mac_configure_filter(struct ieee80211_hw *hw,
1472 unsigned int changed_flags,
1473 unsigned int *total_flags,
1475 int rt2x00mac_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
1477 #ifdef CONFIG_RT2X00_LIB_CRYPTO
1478 int rt2x00mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
1479 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
1480 struct ieee80211_key_conf *key);
1482 #define rt2x00mac_set_key NULL
1483 #endif /* CONFIG_RT2X00_LIB_CRYPTO */
1484 void rt2x00mac_sw_scan_start(struct ieee80211_hw *hw,
1485 struct ieee80211_vif *vif,
1486 const u8 *mac_addr);
1487 void rt2x00mac_sw_scan_complete(struct ieee80211_hw *hw,
1488 struct ieee80211_vif *vif);
1489 int rt2x00mac_get_stats(struct ieee80211_hw *hw,
1490 struct ieee80211_low_level_stats *stats);
1491 void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw,
1492 struct ieee80211_vif *vif,
1493 struct ieee80211_bss_conf *bss_conf,
1495 int rt2x00mac_conf_tx(struct ieee80211_hw *hw,
1496 struct ieee80211_vif *vif,
1497 unsigned int link_id, u16 queue,
1498 const struct ieee80211_tx_queue_params *params);
1499 void rt2x00mac_rfkill_poll(struct ieee80211_hw *hw);
1500 void rt2x00mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1501 u32 queues, bool drop);
1502 int rt2x00mac_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant);
1503 int rt2x00mac_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant);
1504 void rt2x00mac_get_ringparam(struct ieee80211_hw *hw,
1505 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max);
1506 bool rt2x00mac_tx_frames_pending(struct ieee80211_hw *hw);
1509 * Driver allocation handlers.
1511 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev);
1512 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev);
1514 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev);
1515 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev);
1517 #endif /* RT2X00_H */