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/input-polldev.h>
27 #include <linux/kfifo.h>
28 #include <linux/hrtimer.h>
29 #include <linux/average.h>
30 #include <linux/usb.h>
31 #include <linux/clk.h>
33 #include <net/mac80211.h>
35 #include "rt2x00debug.h"
36 #include "rt2x00dump.h"
37 #include "rt2x00leds.h"
38 #include "rt2x00reg.h"
39 #include "rt2x00queue.h"
44 #define DRV_VERSION "2.3.0"
45 #define DRV_PROJECT "http://rt2x00.serialmonkey.com"
48 * Debug output has to be enabled during compile time.
50 #ifdef CONFIG_RT2X00_DEBUG
52 #endif /* CONFIG_RT2X00_DEBUG */
54 /* Utility printing macros
55 * rt2x00_probe_err is for messages when rt2x00_dev is uninitialized
57 #define rt2x00_probe_err(fmt, ...) \
58 printk(KERN_ERR KBUILD_MODNAME ": %s: Error - " fmt, \
59 __func__, ##__VA_ARGS__)
60 #define rt2x00_err(dev, fmt, ...) \
61 wiphy_err_ratelimited((dev)->hw->wiphy, "%s: Error - " fmt, \
62 __func__, ##__VA_ARGS__)
63 #define rt2x00_warn(dev, fmt, ...) \
64 wiphy_warn_ratelimited((dev)->hw->wiphy, "%s: Warning - " fmt, \
65 __func__, ##__VA_ARGS__)
66 #define rt2x00_info(dev, fmt, ...) \
67 wiphy_info((dev)->hw->wiphy, "%s: Info - " fmt, \
68 __func__, ##__VA_ARGS__)
70 /* Various debug levels */
71 #define rt2x00_dbg(dev, fmt, ...) \
72 wiphy_dbg((dev)->hw->wiphy, "%s: Debug - " fmt, \
73 __func__, ##__VA_ARGS__)
74 #define rt2x00_eeprom_dbg(dev, fmt, ...) \
75 wiphy_dbg((dev)->hw->wiphy, "%s: EEPROM recovery - " fmt, \
76 __func__, ##__VA_ARGS__)
79 * Duration calculations
80 * The rate variable passed is: 100kbs.
81 * To convert from bytes to bits we multiply size with 8,
82 * then the size is multiplied with 10 to make the
83 * real rate -> rate argument correction.
85 #define GET_DURATION(__size, __rate) (((__size) * 8 * 10) / (__rate))
86 #define GET_DURATION_RES(__size, __rate)(((__size) * 8 * 10) % (__rate))
89 * Determine the number of L2 padding bytes required between the header and
92 #define L2PAD_SIZE(__hdrlen) (-(__hdrlen) & 3)
95 * Determine the alignment requirement,
96 * to make sure the 802.11 payload is padded to a 4-byte boundrary
97 * we must determine the address of the payload and calculate the
98 * amount of bytes needed to move the data.
100 #define ALIGN_SIZE(__skb, __header) \
101 (((unsigned long)((__skb)->data + (__header))) & 3)
104 * Constants for extra TX headroom for alignment purposes.
106 #define RT2X00_ALIGN_SIZE 4 /* Only whole frame needs alignment */
107 #define RT2X00_L2PAD_SIZE 8 /* Both header & payload need alignment */
110 * Standard timing and size defines.
111 * These values should follow the ieee80211 specifications.
114 #define IEEE80211_HEADER 24
118 #define SHORT_PREAMBLE 72
120 #define SHORT_SLOT_TIME 9
122 #define PIFS (SIFS + SLOT_TIME)
123 #define SHORT_PIFS (SIFS + SHORT_SLOT_TIME)
124 #define DIFS (PIFS + SLOT_TIME)
125 #define SHORT_DIFS (SHORT_PIFS + SHORT_SLOT_TIME)
126 #define EIFS (SIFS + DIFS + \
127 GET_DURATION(IEEE80211_HEADER + ACK_SIZE, 10))
128 #define SHORT_EIFS (SIFS + SHORT_DIFS + \
129 GET_DURATION(IEEE80211_HEADER + ACK_SIZE, 10))
131 enum rt2x00_chip_intf {
132 RT2X00_CHIP_INTF_PCI,
133 RT2X00_CHIP_INTF_PCIE,
134 RT2X00_CHIP_INTF_USB,
135 RT2X00_CHIP_INTF_SOC,
139 * Chipset identification
140 * The chipset on the device is composed of a RT and RF chip.
141 * The chipset combination is important for determining device capabilities.
145 #define RT2460 0x2460
146 #define RT2560 0x2560
147 #define RT2570 0x2570
148 #define RT2661 0x2661
149 #define RT2573 0x2573
150 #define RT2860 0x2860 /* 2.4GHz */
151 #define RT2872 0x2872 /* WSOC */
152 #define RT2883 0x2883 /* WSOC */
153 #define RT3070 0x3070
154 #define RT3071 0x3071
155 #define RT3090 0x3090 /* 2.4GHz PCIe */
156 #define RT3290 0x3290
157 #define RT3352 0x3352 /* WSOC */
158 #define RT3390 0x3390
159 #define RT3572 0x3572
160 #define RT3593 0x3593
161 #define RT3883 0x3883 /* WSOC */
162 #define RT5350 0x5350 /* WSOC 2.4GHz */
163 #define RT5390 0x5390 /* 2.4GHz */
164 #define RT5392 0x5392 /* 2.4GHz */
165 #define RT5592 0x5592
166 #define RT6352 0x6352 /* WSOC 2.4GHz */
171 enum rt2x00_chip_intf intf;
175 * RF register values that belong to a particular channel.
186 * Channel information structure
188 struct channel_info {
190 #define GEOGRAPHY_ALLOWED 0x00000001
193 short default_power1;
194 short default_power2;
195 short default_power3;
199 * Antenna setup values.
201 struct antenna_setup {
209 * Quality statistics about the currently active link.
213 * Statistics required for Link tuning by driver
214 * The rssi value is provided by rt2x00lib during the
215 * link_tuner() callback function.
216 * The false_cca field is filled during the link_stats()
217 * callback function and could be used during the
218 * link_tuner() callback function.
225 * Hardware driver will tune the VGC level during each call
226 * to the link_tuner() callback function. This vgc_level is
227 * is determined based on the link quality statistics like
228 * average RSSI and the false CCA count.
230 * In some cases the drivers need to differentiate between
231 * the currently "desired" VGC level and the level configured
232 * in the hardware. The latter is important to reduce the
233 * number of BBP register reads to reduce register access
234 * overhead. For this reason we store both values here.
240 * Statistics required for Signal quality calculation.
241 * These fields might be changed during the link_stats()
250 DECLARE_EWMA(rssi, 10, 8)
253 * Antenna settings about the currently active link.
260 #define ANTENNA_RX_DIVERSITY 0x00000001
261 #define ANTENNA_TX_DIVERSITY 0x00000002
262 #define ANTENNA_MODE_SAMPLE 0x00000004
265 * Currently active TX/RX antenna setup.
266 * When software diversity is used, this will indicate
267 * which antenna is actually used at this time.
269 struct antenna_setup active;
272 * RSSI history information for the antenna.
273 * Used to determine when to switch antenna
274 * when using software diversity.
279 * Current RSSI average of the currently active antenna.
280 * Similar to the avg_rssi in the link_qual structure
281 * this value is updated by using the walking average.
283 struct ewma_rssi rssi_ant;
287 * To optimize the quality of the link we need to store
288 * the quality of received frames and periodically
294 * The number of times the link has been tuned
295 * since the radio has been switched on.
300 * Quality measurement values.
302 struct link_qual qual;
305 * TX/RX antenna setup.
310 * Currently active average RSSI value
312 struct ewma_rssi avg_rssi;
315 * Work structure for scheduling periodic link tuning.
317 struct delayed_work work;
320 * Work structure for scheduling periodic watchdog monitoring.
321 * This work must be scheduled on the kernel workqueue, while
322 * all other work structures must be queued on the mac80211
323 * workqueue. This guarantees that the watchdog can schedule
324 * other work structures and wait for their completion in order
325 * to bring the device/driver back into the desired state.
327 struct delayed_work watchdog_work;
328 unsigned int watchdog_interval;
329 bool watchdog_disabled;
332 * Work structure for scheduling periodic AGC adjustments.
334 struct delayed_work agc_work;
337 * Work structure for scheduling periodic VCO calibration.
339 struct delayed_work vco_work;
342 enum rt2x00_delayed_flags {
343 DELAYED_UPDATE_BEACON,
347 * Interface structure
348 * Per interface configuration details, this structure
349 * is allocated as the private data for ieee80211_vif.
353 * beacon->skb must be protected with the mutex.
355 struct mutex beacon_skb_mutex;
358 * Entry in the beacon queue which belongs to
359 * this interface. Each interface has its own
360 * dedicated beacon entry.
362 struct queue_entry *beacon;
366 * Actions that needed rescheduling.
368 unsigned long delayed_flags;
371 * Software sequence counter, this is only required
372 * for hardware which doesn't support hardware
378 static inline struct rt2x00_intf* vif_to_intf(struct ieee80211_vif *vif)
380 return (struct rt2x00_intf *)vif->drv_priv;
384 * struct hw_mode_spec: Hardware specifications structure
386 * Details about the supported modes, rates and channels
387 * of a particular chipset. This is used by rt2x00lib
388 * to build the ieee80211_hw_mode array for mac80211.
390 * @supported_bands: Bitmask contained the supported bands (2.4GHz, 5.2GHz).
391 * @supported_rates: Rate types which are supported (CCK, OFDM).
392 * @num_channels: Number of supported channels. This is used as array size
393 * for @tx_power_a, @tx_power_bg and @channels.
394 * @channels: Device/chipset specific channel values (See &struct rf_channel).
395 * @channels_info: Additional information for channels (See &struct channel_info).
396 * @ht: Driver HT Capabilities (See &ieee80211_sta_ht_cap).
398 struct hw_mode_spec {
399 unsigned int supported_bands;
400 #define SUPPORT_BAND_2GHZ 0x00000001
401 #define SUPPORT_BAND_5GHZ 0x00000002
403 unsigned int supported_rates;
404 #define SUPPORT_RATE_CCK 0x00000001
405 #define SUPPORT_RATE_OFDM 0x00000002
407 unsigned int num_channels;
408 const struct rf_channel *channels;
409 const struct channel_info *channels_info;
411 struct ieee80211_sta_ht_cap ht;
415 * Configuration structure wrapper around the
416 * mac80211 configuration structure.
417 * When mac80211 configures the driver, rt2x00lib
418 * can precalculate values which are equal for all
419 * rt2x00 drivers. Those values can be stored in here.
421 struct rt2x00lib_conf {
422 struct ieee80211_conf *conf;
424 struct rf_channel rf;
425 struct channel_info channel;
429 * Configuration structure for erp settings.
431 struct rt2x00lib_erp {
449 * Configuration structure for hardware encryption.
451 struct rt2x00lib_crypto {
454 enum set_key_cmd cmd;
467 * Configuration structure wrapper around the
468 * rt2x00 interface configuration handler.
470 struct rt2x00intf_conf {
474 enum nl80211_iftype type;
477 * TSF sync value, this is dependent on the operation type.
482 * The MAC and BSSID addresses are simple array of bytes,
483 * these arrays are little endian, so when sending the addresses
484 * to the drivers, copy the it into a endian-signed variable.
486 * Note that all devices (except rt2500usb) have 32 bits
487 * register word sizes. This means that whatever variable we
488 * pass _must_ be a multiple of 32 bits. Otherwise the device
489 * might not accept what we are sending to it.
490 * This will also make it easier for the driver to write
491 * the data to the device.
498 * Private structure for storing STA details
499 * wcid: Wireless Client ID
505 static inline struct rt2x00_sta* sta_to_rt2x00_sta(struct ieee80211_sta *sta)
507 return (struct rt2x00_sta *)sta->drv_priv;
511 * rt2x00lib callback functions.
513 struct rt2x00lib_ops {
515 * Interrupt handlers.
517 irq_handler_t irq_handler;
520 * TX status tasklet handler.
522 void (*txstatus_tasklet) (unsigned long data);
523 void (*pretbtt_tasklet) (unsigned long data);
524 void (*tbtt_tasklet) (unsigned long data);
525 void (*rxdone_tasklet) (unsigned long data);
526 void (*autowake_tasklet) (unsigned long data);
529 * Device init handlers.
531 int (*probe_hw) (struct rt2x00_dev *rt2x00dev);
532 char *(*get_firmware_name) (struct rt2x00_dev *rt2x00dev);
533 int (*check_firmware) (struct rt2x00_dev *rt2x00dev,
534 const u8 *data, const size_t len);
535 int (*load_firmware) (struct rt2x00_dev *rt2x00dev,
536 const u8 *data, const size_t len);
539 * Device initialization/deinitialization handlers.
541 int (*initialize) (struct rt2x00_dev *rt2x00dev);
542 void (*uninitialize) (struct rt2x00_dev *rt2x00dev);
545 * queue initialization handlers
547 bool (*get_entry_state) (struct queue_entry *entry);
548 void (*clear_entry) (struct queue_entry *entry);
551 * Radio control handlers.
553 int (*set_device_state) (struct rt2x00_dev *rt2x00dev,
554 enum dev_state state);
555 int (*rfkill_poll) (struct rt2x00_dev *rt2x00dev);
556 void (*link_stats) (struct rt2x00_dev *rt2x00dev,
557 struct link_qual *qual);
558 void (*reset_tuner) (struct rt2x00_dev *rt2x00dev,
559 struct link_qual *qual);
560 void (*link_tuner) (struct rt2x00_dev *rt2x00dev,
561 struct link_qual *qual, const u32 count);
562 void (*gain_calibration) (struct rt2x00_dev *rt2x00dev);
563 void (*vco_calibration) (struct rt2x00_dev *rt2x00dev);
566 * Data queue handlers.
568 void (*watchdog) (struct rt2x00_dev *rt2x00dev);
569 void (*start_queue) (struct data_queue *queue);
570 void (*kick_queue) (struct data_queue *queue);
571 void (*stop_queue) (struct data_queue *queue);
572 void (*flush_queue) (struct data_queue *queue, bool drop);
573 void (*tx_dma_done) (struct queue_entry *entry);
576 * TX control handlers
578 void (*write_tx_desc) (struct queue_entry *entry,
579 struct txentry_desc *txdesc);
580 void (*write_tx_data) (struct queue_entry *entry,
581 struct txentry_desc *txdesc);
582 void (*write_beacon) (struct queue_entry *entry,
583 struct txentry_desc *txdesc);
584 void (*clear_beacon) (struct queue_entry *entry);
585 int (*get_tx_data_len) (struct queue_entry *entry);
588 * RX control handlers
590 void (*fill_rxdone) (struct queue_entry *entry,
591 struct rxdone_entry_desc *rxdesc);
594 * Configuration handlers.
596 int (*config_shared_key) (struct rt2x00_dev *rt2x00dev,
597 struct rt2x00lib_crypto *crypto,
598 struct ieee80211_key_conf *key);
599 int (*config_pairwise_key) (struct rt2x00_dev *rt2x00dev,
600 struct rt2x00lib_crypto *crypto,
601 struct ieee80211_key_conf *key);
602 void (*config_filter) (struct rt2x00_dev *rt2x00dev,
603 const unsigned int filter_flags);
604 void (*config_intf) (struct rt2x00_dev *rt2x00dev,
605 struct rt2x00_intf *intf,
606 struct rt2x00intf_conf *conf,
607 const unsigned int flags);
608 #define CONFIG_UPDATE_TYPE ( 1 << 1 )
609 #define CONFIG_UPDATE_MAC ( 1 << 2 )
610 #define CONFIG_UPDATE_BSSID ( 1 << 3 )
612 void (*config_erp) (struct rt2x00_dev *rt2x00dev,
613 struct rt2x00lib_erp *erp,
615 void (*config_ant) (struct rt2x00_dev *rt2x00dev,
616 struct antenna_setup *ant);
617 void (*config) (struct rt2x00_dev *rt2x00dev,
618 struct rt2x00lib_conf *libconf,
619 const unsigned int changed_flags);
620 void (*pre_reset_hw) (struct rt2x00_dev *rt2x00dev);
621 int (*sta_add) (struct rt2x00_dev *rt2x00dev,
622 struct ieee80211_vif *vif,
623 struct ieee80211_sta *sta);
624 int (*sta_remove) (struct rt2x00_dev *rt2x00dev,
625 struct ieee80211_sta *sta);
629 * rt2x00 driver callback operation structure.
633 const unsigned int drv_data_size;
634 const unsigned int max_ap_intf;
635 const unsigned int eeprom_size;
636 const unsigned int rf_size;
637 const unsigned int tx_queues;
638 void (*queue_init)(struct data_queue *queue);
639 const struct rt2x00lib_ops *lib;
641 const struct ieee80211_ops *hw;
642 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
643 const struct rt2x00debug *debugfs;
644 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
650 enum rt2x00_state_flags {
654 DEVICE_STATE_PRESENT,
655 DEVICE_STATE_REGISTERED_HW,
656 DEVICE_STATE_INITIALIZED,
657 DEVICE_STATE_STARTED,
658 DEVICE_STATE_ENABLED_RADIO,
659 DEVICE_STATE_SCANNING,
660 DEVICE_STATE_FLUSHING,
664 * Driver configuration
672 * Mark we currently are sequentially reading TX_STA_FIFO register
673 * FIXME: this is for only rt2800usb, should go to private data
679 * rt2x00 capability flags
681 enum rt2x00_capability_flags {
686 REQUIRE_BEACON_GUARD,
691 REQUIRE_TXSTATUS_FIFO,
692 REQUIRE_TASKLET_CONTEXT,
696 REQUIRE_DELAYED_RFKILL,
701 CAPABILITY_HW_BUTTON,
702 CAPABILITY_HW_CRYPTO,
703 CAPABILITY_POWER_LIMIT,
704 CAPABILITY_CONTROL_FILTERS,
705 CAPABILITY_CONTROL_FILTER_PSPOLL,
706 CAPABILITY_PRE_TBTT_INTERRUPT,
707 CAPABILITY_LINK_TUNING,
708 CAPABILITY_FRAME_TYPE,
709 CAPABILITY_RF_SEQUENCE,
710 CAPABILITY_EXTERNAL_LNA_A,
711 CAPABILITY_EXTERNAL_LNA_BG,
712 CAPABILITY_DOUBLE_ANTENNA,
713 CAPABILITY_BT_COEXIST,
714 CAPABILITY_VCO_RECALIBRATION,
715 CAPABILITY_EXTERNAL_PA_TX0,
716 CAPABILITY_EXTERNAL_PA_TX1,
717 CAPABILITY_RESTART_HW,
721 * Interface combinations
729 * rt2x00 device structure.
734 * The structure stored in here depends on the
735 * system bus (PCI or USB).
736 * When accessing this variable, the rt2x00dev_{pci,usb}
737 * macros should be used for correct typecasting.
742 * Callback functions.
744 const struct rt2x00_ops *ops;
752 * IEEE80211 control structure.
754 struct ieee80211_hw *hw;
755 struct ieee80211_supported_band bands[NUM_NL80211_BANDS];
756 enum nl80211_band curr_band;
760 * If enabled, the debugfs interface structures
761 * required for deregistration of debugfs.
763 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
764 struct rt2x00debug_intf *debugfs_intf;
765 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
768 * LED structure for changing the LED status
769 * by mac8011 or the kernel.
771 #ifdef CONFIG_RT2X00_LIB_LEDS
772 struct rt2x00_led led_radio;
773 struct rt2x00_led led_assoc;
774 struct rt2x00_led led_qual;
776 #endif /* CONFIG_RT2X00_LIB_LEDS */
779 * Device state flags.
780 * In these flags the current status is stored.
781 * Access to these flags should occur atomically.
786 * Device capabiltiy flags.
787 * In these flags the device/driver capabilities are stored.
788 * Access to these flags should occur non-atomically.
790 unsigned long cap_flags;
793 * Device information, Bus IRQ and name (PCI, SoC)
799 * Chipset identification.
801 struct rt2x00_chip chip;
804 * hw capability specifications.
806 struct hw_mode_spec spec;
809 * This is the default TX/RX antenna setup as indicated
810 * by the device's EEPROM.
812 struct antenna_setup default_ant;
816 * csr.base: CSR base register address. (PCI)
817 * csr.cache: CSR cache for usb_control_msg. (USB)
825 * Mutex to protect register accesses.
826 * For PCI and USB devices it protects against concurrent indirect
827 * register access (BBP, RF, MCU) since accessing those
828 * registers require multiple calls to the CSR registers.
829 * For USB devices it also protects the csr_cache since that
830 * field is used for normal CSR access and it cannot support
831 * multiple callers simultaneously.
833 struct mutex csr_mutex;
836 * Mutex to synchronize config and link tuner.
838 struct mutex conf_mutex;
840 * Current packet filter configuration for the device.
841 * This contains all currently active FIF_* flags send
842 * to us by mac80211 during configure_filter().
844 unsigned int packet_filter;
848 * - Open ap interface count.
849 * - Open sta interface count.
850 * - Association count.
851 * - Beaconing enabled count.
853 unsigned int intf_ap_count;
854 unsigned int intf_sta_count;
855 unsigned int intf_associated;
856 unsigned int intf_beaconing;
859 * Interface combinations
861 struct ieee80211_iface_limit if_limits_ap;
862 struct ieee80211_iface_combination if_combinations[NUM_IF_COMB];
875 * Active RF register values.
876 * These are stored here so we don't need
877 * to read the rf registers and can directly
878 * use this value instead.
879 * This field should be accessed by using
880 * rt2x00_rf_read() and rt2x00_rf_write().
890 * Current TX power value.
895 * Current retry values.
901 * Rssi <-> Dbm offset
921 * Timestamp of last received beacon
923 unsigned long last_beacon;
926 * Low level statistics which will have
927 * to be kept up to date while device is running.
929 struct ieee80211_low_level_stats low_level_stats;
932 * Work queue for all work which should not be placed
933 * on the mac80211 workqueue (because of dependencies
934 * between various work structures).
936 struct workqueue_struct *workqueue;
940 * NOTE: intf_work will use ieee80211_iterate_active_interfaces()
941 * which means it cannot be placed on the hw->workqueue
942 * due to RTNL locking requirements.
944 struct work_struct intf_work;
947 * Scheduled work for TX/RX done handling (USB devices)
949 struct work_struct rxdone_work;
950 struct work_struct txdone_work;
955 struct delayed_work autowakeup_work;
956 struct work_struct sleep_work;
959 * Data queue arrays for RX, TX, Beacon and ATIM.
961 unsigned int data_queues;
962 struct data_queue *rx;
963 struct data_queue *tx;
964 struct data_queue *bcn;
965 struct data_queue *atim;
970 const struct firmware *fw;
973 * FIFO for storing tx status reports between isr and tasklet.
975 DECLARE_KFIFO_PTR(txstatus_fifo, u32);
978 * Timer to ensure tx status reports are read (rt2800usb).
980 struct hrtimer txstatus_timer;
983 * Tasklet for processing tx status reports (rt2800pci).
985 struct tasklet_struct txstatus_tasklet;
986 struct tasklet_struct pretbtt_tasklet;
987 struct tasklet_struct tbtt_tasklet;
988 struct tasklet_struct rxdone_tasklet;
989 struct tasklet_struct autowake_tasklet;
992 * Used for VCO periodic calibration.
997 * Protect the interrupt mask register.
999 spinlock_t irqmask_lock;
1002 * List of BlockAckReq TX entries that need driver BlockAck processing.
1004 struct list_head bar_list;
1005 spinlock_t bar_list_lock;
1007 /* Extra TX headroom required for alignment purposes. */
1008 unsigned int extra_tx_headroom;
1010 struct usb_anchor *anchor;
1011 unsigned int num_proto_errs;
1013 /* Clock for System On Chip devices. */
1017 struct rt2x00_bar_list_entry {
1018 struct list_head list;
1019 struct rcu_head head;
1021 struct queue_entry *entry;
1024 /* Relevant parts of the IEEE80211 BAR header */
1028 __le16 start_seq_num;
1033 * Some registers require multiple attempts before success,
1034 * in those cases REGISTER_BUSY_COUNT attempts should be
1035 * taken with a REGISTER_BUSY_DELAY interval. Due to USB
1036 * bus delays, we do not have to loop so many times to wait
1037 * for valid register value on that bus.
1039 #define REGISTER_BUSY_COUNT 100
1040 #define REGISTER_USB_BUSY_COUNT 20
1041 #define REGISTER_BUSY_DELAY 100
1044 * Generic RF access.
1045 * The RF is being accessed by word index.
1047 static inline u32 rt2x00_rf_read(struct rt2x00_dev *rt2x00dev,
1048 const unsigned int word)
1050 BUG_ON(word < 1 || word > rt2x00dev->ops->rf_size / sizeof(u32));
1051 return rt2x00dev->rf[word - 1];
1054 static inline void rt2x00_rf_write(struct rt2x00_dev *rt2x00dev,
1055 const unsigned int word, u32 data)
1057 BUG_ON(word < 1 || word > rt2x00dev->ops->rf_size / sizeof(u32));
1058 rt2x00dev->rf[word - 1] = data;
1062 * Generic EEPROM access. The EEPROM is being accessed by word or byte index.
1064 static inline void *rt2x00_eeprom_addr(struct rt2x00_dev *rt2x00dev,
1065 const unsigned int word)
1067 return (void *)&rt2x00dev->eeprom[word];
1070 static inline u16 rt2x00_eeprom_read(struct rt2x00_dev *rt2x00dev,
1071 const unsigned int word)
1073 return le16_to_cpu(rt2x00dev->eeprom[word]);
1076 static inline void rt2x00_eeprom_write(struct rt2x00_dev *rt2x00dev,
1077 const unsigned int word, u16 data)
1079 rt2x00dev->eeprom[word] = cpu_to_le16(data);
1082 static inline u8 rt2x00_eeprom_byte(struct rt2x00_dev *rt2x00dev,
1083 const unsigned int byte)
1085 return *(((u8 *)rt2x00dev->eeprom) + byte);
1091 static inline void rt2x00_set_chip(struct rt2x00_dev *rt2x00dev,
1092 const u16 rt, const u16 rf, const u16 rev)
1094 rt2x00dev->chip.rt = rt;
1095 rt2x00dev->chip.rf = rf;
1096 rt2x00dev->chip.rev = rev;
1098 rt2x00_info(rt2x00dev, "Chipset detected - rt: %04x, rf: %04x, rev: %04x\n",
1099 rt2x00dev->chip.rt, rt2x00dev->chip.rf,
1100 rt2x00dev->chip.rev);
1103 static inline void rt2x00_set_rt(struct rt2x00_dev *rt2x00dev,
1104 const u16 rt, const u16 rev)
1106 rt2x00dev->chip.rt = rt;
1107 rt2x00dev->chip.rev = rev;
1109 rt2x00_info(rt2x00dev, "RT chipset %04x, rev %04x detected\n",
1110 rt2x00dev->chip.rt, rt2x00dev->chip.rev);
1113 static inline void rt2x00_set_rf(struct rt2x00_dev *rt2x00dev, const u16 rf)
1115 rt2x00dev->chip.rf = rf;
1117 rt2x00_info(rt2x00dev, "RF chipset %04x detected\n",
1118 rt2x00dev->chip.rf);
1121 static inline bool rt2x00_rt(struct rt2x00_dev *rt2x00dev, const u16 rt)
1123 return (rt2x00dev->chip.rt == rt);
1126 static inline bool rt2x00_rf(struct rt2x00_dev *rt2x00dev, const u16 rf)
1128 return (rt2x00dev->chip.rf == rf);
1131 static inline u16 rt2x00_rev(struct rt2x00_dev *rt2x00dev)
1133 return rt2x00dev->chip.rev;
1136 static inline bool rt2x00_rt_rev(struct rt2x00_dev *rt2x00dev,
1137 const u16 rt, const u16 rev)
1139 return (rt2x00_rt(rt2x00dev, rt) && rt2x00_rev(rt2x00dev) == rev);
1142 static inline bool rt2x00_rt_rev_lt(struct rt2x00_dev *rt2x00dev,
1143 const u16 rt, const u16 rev)
1145 return (rt2x00_rt(rt2x00dev, rt) && rt2x00_rev(rt2x00dev) < rev);
1148 static inline bool rt2x00_rt_rev_gte(struct rt2x00_dev *rt2x00dev,
1149 const u16 rt, const u16 rev)
1151 return (rt2x00_rt(rt2x00dev, rt) && rt2x00_rev(rt2x00dev) >= rev);
1154 static inline void rt2x00_set_chip_intf(struct rt2x00_dev *rt2x00dev,
1155 enum rt2x00_chip_intf intf)
1157 rt2x00dev->chip.intf = intf;
1160 static inline bool rt2x00_intf(struct rt2x00_dev *rt2x00dev,
1161 enum rt2x00_chip_intf intf)
1163 return (rt2x00dev->chip.intf == intf);
1166 static inline bool rt2x00_is_pci(struct rt2x00_dev *rt2x00dev)
1168 return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_PCI) ||
1169 rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE);
1172 static inline bool rt2x00_is_pcie(struct rt2x00_dev *rt2x00dev)
1174 return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_PCIE);
1177 static inline bool rt2x00_is_usb(struct rt2x00_dev *rt2x00dev)
1179 return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_USB);
1182 static inline bool rt2x00_is_soc(struct rt2x00_dev *rt2x00dev)
1184 return rt2x00_intf(rt2x00dev, RT2X00_CHIP_INTF_SOC);
1187 /* Helpers for capability flags */
1190 rt2x00_has_cap_flag(struct rt2x00_dev *rt2x00dev,
1191 enum rt2x00_capability_flags cap_flag)
1193 return test_bit(cap_flag, &rt2x00dev->cap_flags);
1197 rt2x00_has_cap_hw_crypto(struct rt2x00_dev *rt2x00dev)
1199 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_HW_CRYPTO);
1203 rt2x00_has_cap_power_limit(struct rt2x00_dev *rt2x00dev)
1205 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_POWER_LIMIT);
1209 rt2x00_has_cap_control_filters(struct rt2x00_dev *rt2x00dev)
1211 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_CONTROL_FILTERS);
1215 rt2x00_has_cap_control_filter_pspoll(struct rt2x00_dev *rt2x00dev)
1217 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_CONTROL_FILTER_PSPOLL);
1221 rt2x00_has_cap_pre_tbtt_interrupt(struct rt2x00_dev *rt2x00dev)
1223 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_PRE_TBTT_INTERRUPT);
1227 rt2x00_has_cap_link_tuning(struct rt2x00_dev *rt2x00dev)
1229 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_LINK_TUNING);
1233 rt2x00_has_cap_frame_type(struct rt2x00_dev *rt2x00dev)
1235 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_FRAME_TYPE);
1239 rt2x00_has_cap_rf_sequence(struct rt2x00_dev *rt2x00dev)
1241 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_RF_SEQUENCE);
1245 rt2x00_has_cap_external_lna_a(struct rt2x00_dev *rt2x00dev)
1247 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_EXTERNAL_LNA_A);
1251 rt2x00_has_cap_external_lna_bg(struct rt2x00_dev *rt2x00dev)
1253 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_EXTERNAL_LNA_BG);
1257 rt2x00_has_cap_double_antenna(struct rt2x00_dev *rt2x00dev)
1259 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_DOUBLE_ANTENNA);
1263 rt2x00_has_cap_bt_coexist(struct rt2x00_dev *rt2x00dev)
1265 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_BT_COEXIST);
1269 rt2x00_has_cap_vco_recalibration(struct rt2x00_dev *rt2x00dev)
1271 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_VCO_RECALIBRATION);
1275 rt2x00_has_cap_restart_hw(struct rt2x00_dev *rt2x00dev)
1277 return rt2x00_has_cap_flag(rt2x00dev, CAPABILITY_RESTART_HW);
1281 * rt2x00queue_map_txskb - Map a skb into DMA for TX purposes.
1282 * @entry: Pointer to &struct queue_entry
1284 * Returns -ENOMEM if mapping fail, 0 otherwise.
1286 int rt2x00queue_map_txskb(struct queue_entry *entry);
1289 * rt2x00queue_unmap_skb - Unmap a skb from DMA.
1290 * @entry: Pointer to &struct queue_entry
1292 void rt2x00queue_unmap_skb(struct queue_entry *entry);
1295 * rt2x00queue_get_tx_queue - Convert tx queue index to queue pointer
1296 * @rt2x00dev: Pointer to &struct rt2x00_dev.
1297 * @queue: rt2x00 queue index (see &enum data_queue_qid).
1299 * Returns NULL for non tx queues.
1301 static inline struct data_queue *
1302 rt2x00queue_get_tx_queue(struct rt2x00_dev *rt2x00dev,
1303 const enum data_queue_qid queue)
1305 if (queue < rt2x00dev->ops->tx_queues && rt2x00dev->tx)
1306 return &rt2x00dev->tx[queue];
1308 if (queue == QID_ATIM)
1309 return rt2x00dev->atim;
1315 * rt2x00queue_get_entry - Get queue entry where the given index points to.
1316 * @queue: Pointer to &struct data_queue from where we obtain the entry.
1317 * @index: Index identifier for obtaining the correct index.
1319 struct queue_entry *rt2x00queue_get_entry(struct data_queue *queue,
1320 enum queue_index index);
1323 * rt2x00queue_pause_queue - Pause a data queue
1324 * @queue: Pointer to &struct data_queue.
1326 * This function will pause the data queue locally, preventing
1327 * new frames to be added to the queue (while the hardware is
1328 * still allowed to run).
1330 void rt2x00queue_pause_queue(struct data_queue *queue);
1333 * rt2x00queue_unpause_queue - unpause a data queue
1334 * @queue: Pointer to &struct data_queue.
1336 * This function will unpause the data queue locally, allowing
1337 * new frames to be added to the queue again.
1339 void rt2x00queue_unpause_queue(struct data_queue *queue);
1342 * rt2x00queue_start_queue - Start a data queue
1343 * @queue: Pointer to &struct data_queue.
1345 * This function will start handling all pending frames in the queue.
1347 void rt2x00queue_start_queue(struct data_queue *queue);
1350 * rt2x00queue_stop_queue - Halt a data queue
1351 * @queue: Pointer to &struct data_queue.
1353 * This function will stop all pending frames in the queue.
1355 void rt2x00queue_stop_queue(struct data_queue *queue);
1358 * rt2x00queue_flush_queue - Flush a data queue
1359 * @queue: Pointer to &struct data_queue.
1360 * @drop: True to drop all pending frames.
1362 * This function will flush the queue. After this call
1363 * the queue is guaranteed to be empty.
1365 void rt2x00queue_flush_queue(struct data_queue *queue, bool drop);
1368 * rt2x00queue_start_queues - Start all data queues
1369 * @rt2x00dev: Pointer to &struct rt2x00_dev.
1371 * This function will loop through all available queues to start them
1373 void rt2x00queue_start_queues(struct rt2x00_dev *rt2x00dev);
1376 * rt2x00queue_stop_queues - Halt all data queues
1377 * @rt2x00dev: Pointer to &struct rt2x00_dev.
1379 * This function will loop through all available queues to stop
1380 * any pending frames.
1382 void rt2x00queue_stop_queues(struct rt2x00_dev *rt2x00dev);
1385 * rt2x00queue_flush_queues - Flush all data queues
1386 * @rt2x00dev: Pointer to &struct rt2x00_dev.
1387 * @drop: True to drop all pending frames.
1389 * This function will loop through all available queues to flush
1390 * any pending frames.
1392 void rt2x00queue_flush_queues(struct rt2x00_dev *rt2x00dev, bool drop);
1398 * rt2x00debug_dump_frame - Dump a frame to userspace through debugfs.
1399 * @rt2x00dev: Pointer to &struct rt2x00_dev.
1400 * @type: The type of frame that is being dumped.
1401 * @entry: The queue entry containing the frame to be dumped.
1403 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
1404 void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
1405 enum rt2x00_dump_type type, struct queue_entry *entry);
1407 static inline void rt2x00debug_dump_frame(struct rt2x00_dev *rt2x00dev,
1408 enum rt2x00_dump_type type,
1409 struct queue_entry *entry)
1412 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
1415 * Utility functions.
1417 u32 rt2x00lib_get_bssidx(struct rt2x00_dev *rt2x00dev,
1418 struct ieee80211_vif *vif);
1419 void rt2x00lib_set_mac_address(struct rt2x00_dev *rt2x00dev, u8 *eeprom_mac_addr);
1422 * Interrupt context handlers.
1424 void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev);
1425 void rt2x00lib_pretbtt(struct rt2x00_dev *rt2x00dev);
1426 void rt2x00lib_dmastart(struct queue_entry *entry);
1427 void rt2x00lib_dmadone(struct queue_entry *entry);
1428 void rt2x00lib_txdone(struct queue_entry *entry,
1429 struct txdone_entry_desc *txdesc);
1430 void rt2x00lib_txdone_nomatch(struct queue_entry *entry,
1431 struct txdone_entry_desc *txdesc);
1432 void rt2x00lib_txdone_noinfo(struct queue_entry *entry, u32 status);
1433 void rt2x00lib_rxdone(struct queue_entry *entry, gfp_t gfp);
1436 * mac80211 handlers.
1438 void rt2x00mac_tx(struct ieee80211_hw *hw,
1439 struct ieee80211_tx_control *control,
1440 struct sk_buff *skb);
1441 int rt2x00mac_start(struct ieee80211_hw *hw);
1442 void rt2x00mac_stop(struct ieee80211_hw *hw);
1443 int rt2x00mac_add_interface(struct ieee80211_hw *hw,
1444 struct ieee80211_vif *vif);
1445 void rt2x00mac_remove_interface(struct ieee80211_hw *hw,
1446 struct ieee80211_vif *vif);
1447 int rt2x00mac_config(struct ieee80211_hw *hw, u32 changed);
1448 void rt2x00mac_configure_filter(struct ieee80211_hw *hw,
1449 unsigned int changed_flags,
1450 unsigned int *total_flags,
1452 int rt2x00mac_set_tim(struct ieee80211_hw *hw, struct ieee80211_sta *sta,
1454 #ifdef CONFIG_RT2X00_LIB_CRYPTO
1455 int rt2x00mac_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
1456 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
1457 struct ieee80211_key_conf *key);
1459 #define rt2x00mac_set_key NULL
1460 #endif /* CONFIG_RT2X00_LIB_CRYPTO */
1461 void rt2x00mac_sw_scan_start(struct ieee80211_hw *hw,
1462 struct ieee80211_vif *vif,
1463 const u8 *mac_addr);
1464 void rt2x00mac_sw_scan_complete(struct ieee80211_hw *hw,
1465 struct ieee80211_vif *vif);
1466 int rt2x00mac_get_stats(struct ieee80211_hw *hw,
1467 struct ieee80211_low_level_stats *stats);
1468 void rt2x00mac_bss_info_changed(struct ieee80211_hw *hw,
1469 struct ieee80211_vif *vif,
1470 struct ieee80211_bss_conf *bss_conf,
1472 int rt2x00mac_conf_tx(struct ieee80211_hw *hw,
1473 struct ieee80211_vif *vif, u16 queue,
1474 const struct ieee80211_tx_queue_params *params);
1475 void rt2x00mac_rfkill_poll(struct ieee80211_hw *hw);
1476 void rt2x00mac_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1477 u32 queues, bool drop);
1478 int rt2x00mac_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant);
1479 int rt2x00mac_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant);
1480 void rt2x00mac_get_ringparam(struct ieee80211_hw *hw,
1481 u32 *tx, u32 *tx_max, u32 *rx, u32 *rx_max);
1482 bool rt2x00mac_tx_frames_pending(struct ieee80211_hw *hw);
1485 * Driver allocation handlers.
1487 int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev);
1488 void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev);
1490 int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state);
1491 int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev);
1492 #endif /* CONFIG_PM */
1494 #endif /* RT2X00_H */