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1 | /* |
2 | Copyright (C) 2004 - 2007 rt2x00 SourceForge Project | |
3 | <http://rt2x00.serialmonkey.com> | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 2 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; if not, write to the | |
17 | Free Software Foundation, Inc., | |
18 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
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/prefetch.h> | |
31 | #include <linux/skbuff.h> | |
32 | #include <linux/workqueue.h> | |
33 | #include <linux/firmware.h> | |
34 | ||
35 | #include <net/mac80211.h> | |
36 | ||
37 | #include "rt2x00debug.h" | |
38 | #include "rt2x00reg.h" | |
39 | #include "rt2x00ring.h" | |
40 | ||
41 | /* | |
42 | * Module information. | |
43 | * DRV_NAME should be set within the individual module source files. | |
44 | */ | |
45 | #define DRV_VERSION "2.0.8" | |
46 | #define DRV_PROJECT "http://rt2x00.serialmonkey.com" | |
47 | ||
48 | /* | |
49 | * Debug definitions. | |
50 | * Debug output has to be enabled during compile time. | |
51 | */ | |
52 | #define DEBUG_PRINTK_MSG(__dev, __kernlvl, __lvl, __msg, __args...) \ | |
53 | printk(__kernlvl "%s -> %s: %s - " __msg, \ | |
54 | wiphy_name((__dev)->hw->wiphy), __FUNCTION__, __lvl, ##__args) | |
55 | ||
56 | #define DEBUG_PRINTK_PROBE(__kernlvl, __lvl, __msg, __args...) \ | |
57 | printk(__kernlvl "%s -> %s: %s - " __msg, \ | |
58 | DRV_NAME, __FUNCTION__, __lvl, ##__args) | |
59 | ||
60 | #ifdef CONFIG_RT2X00_DEBUG | |
61 | #define DEBUG_PRINTK(__dev, __kernlvl, __lvl, __msg, __args...) \ | |
62 | DEBUG_PRINTK_MSG(__dev, __kernlvl, __lvl, __msg, ##__args); | |
63 | #else | |
64 | #define DEBUG_PRINTK(__dev, __kernlvl, __lvl, __msg, __args...) \ | |
65 | do { } while (0) | |
66 | #endif /* CONFIG_RT2X00_DEBUG */ | |
67 | ||
68 | /* | |
69 | * Various debug levels. | |
70 | * The debug levels PANIC and ERROR both indicate serious problems, | |
71 | * for this reason they should never be ignored. | |
72 | * The special ERROR_PROBE message is for messages that are generated | |
73 | * when the rt2x00_dev is not yet initialized. | |
74 | */ | |
75 | #define PANIC(__dev, __msg, __args...) \ | |
76 | DEBUG_PRINTK_MSG(__dev, KERN_CRIT, "Panic", __msg, ##__args) | |
77 | #define ERROR(__dev, __msg, __args...) \ | |
78 | DEBUG_PRINTK_MSG(__dev, KERN_ERR, "Error", __msg, ##__args) | |
79 | #define ERROR_PROBE(__msg, __args...) \ | |
80 | DEBUG_PRINTK_PROBE(KERN_ERR, "Error", __msg, ##__args) | |
81 | #define WARNING(__dev, __msg, __args...) \ | |
82 | DEBUG_PRINTK(__dev, KERN_WARNING, "Warning", __msg, ##__args) | |
83 | #define NOTICE(__dev, __msg, __args...) \ | |
84 | DEBUG_PRINTK(__dev, KERN_NOTICE, "Notice", __msg, ##__args) | |
85 | #define INFO(__dev, __msg, __args...) \ | |
86 | DEBUG_PRINTK(__dev, KERN_INFO, "Info", __msg, ##__args) | |
87 | #define DEBUG(__dev, __msg, __args...) \ | |
88 | DEBUG_PRINTK(__dev, KERN_DEBUG, "Debug", __msg, ##__args) | |
89 | #define EEPROM(__dev, __msg, __args...) \ | |
90 | DEBUG_PRINTK(__dev, KERN_DEBUG, "EEPROM recovery", __msg, ##__args) | |
91 | ||
92 | /* | |
93 | * Ring sizes. | |
94 | * Ralink PCI devices demand the Frame size to be a multiple of 128 bytes. | |
95 | * DATA_FRAME_SIZE is used for TX, RX, ATIM and PRIO rings. | |
96 | * MGMT_FRAME_SIZE is used for the BEACON ring. | |
97 | */ | |
98 | #define DATA_FRAME_SIZE 2432 | |
99 | #define MGMT_FRAME_SIZE 256 | |
100 | ||
101 | /* | |
102 | * Number of entries in a packet ring. | |
103 | * PCI devices only need 1 Beacon entry, | |
104 | * but USB devices require a second because they | |
105 | * have to send a Guardian byte first. | |
106 | */ | |
107 | #define RX_ENTRIES 12 | |
108 | #define TX_ENTRIES 12 | |
109 | #define ATIM_ENTRIES 1 | |
110 | #define BEACON_ENTRIES 2 | |
111 | ||
112 | /* | |
113 | * Standard timing and size defines. | |
114 | * These values should follow the ieee80211 specifications. | |
115 | */ | |
116 | #define ACK_SIZE 14 | |
117 | #define IEEE80211_HEADER 24 | |
118 | #define PLCP 48 | |
119 | #define BEACON 100 | |
120 | #define PREAMBLE 144 | |
121 | #define SHORT_PREAMBLE 72 | |
122 | #define SLOT_TIME 20 | |
123 | #define SHORT_SLOT_TIME 9 | |
124 | #define SIFS 10 | |
125 | #define PIFS ( SIFS + SLOT_TIME ) | |
126 | #define SHORT_PIFS ( SIFS + SHORT_SLOT_TIME ) | |
127 | #define DIFS ( PIFS + SLOT_TIME ) | |
128 | #define SHORT_DIFS ( SHORT_PIFS + SHORT_SLOT_TIME ) | |
129 | #define EIFS ( SIFS + (8 * (IEEE80211_HEADER + ACK_SIZE)) ) | |
130 | ||
131 | /* | |
132 | * IEEE802.11 header defines | |
133 | */ | |
134 | static inline int is_rts_frame(u16 fc) | |
135 | { | |
136 | return !!(((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) && | |
137 | ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_RTS)); | |
138 | } | |
139 | ||
140 | static inline int is_cts_frame(u16 fc) | |
141 | { | |
142 | return !!(((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) && | |
143 | ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_CTS)); | |
144 | } | |
145 | ||
146 | static inline int is_probe_resp(u16 fc) | |
147 | { | |
148 | return !!(((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) && | |
149 | ((fc & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PROBE_RESP)); | |
150 | } | |
151 | ||
152 | /* | |
153 | * Chipset identification | |
154 | * The chipset on the device is composed of a RT and RF chip. | |
155 | * The chipset combination is important for determining device capabilities. | |
156 | */ | |
157 | struct rt2x00_chip { | |
158 | u16 rt; | |
159 | #define RT2460 0x0101 | |
160 | #define RT2560 0x0201 | |
161 | #define RT2570 0x1201 | |
162 | #define RT2561 0x0301 | |
163 | #define RT2561s 0x0302 | |
164 | #define RT2661 0x0401 | |
165 | #define RT2571 0x1300 | |
166 | ||
167 | u16 rf; | |
168 | u32 rev; | |
169 | }; | |
170 | ||
171 | /* | |
172 | * RF register values that belong to a particular channel. | |
173 | */ | |
174 | struct rf_channel { | |
175 | int channel; | |
176 | u32 rf1; | |
177 | u32 rf2; | |
178 | u32 rf3; | |
179 | u32 rf4; | |
180 | }; | |
181 | ||
182 | /* | |
183 | * To optimize the quality of the link we need to store | |
184 | * the quality of received frames and periodically | |
185 | * optimize the link. | |
186 | */ | |
187 | struct link { | |
188 | /* | |
189 | * Link tuner counter | |
190 | * The number of times the link has been tuned | |
191 | * since the radio has been switched on. | |
192 | */ | |
193 | u32 count; | |
194 | ||
195 | /* | |
196 | * Statistics required for Link tuning. | |
197 | * For the average RSSI value we use the "Walking average" approach. | |
198 | * When adding RSSI to the average value the following calculation | |
199 | * is needed: | |
200 | * | |
201 | * avg_rssi = ((avg_rssi * 7) + rssi) / 8; | |
202 | * | |
203 | * The advantage of this approach is that we only need 1 variable | |
204 | * to store the average in (No need for a count and a total). | |
205 | * But more importantly, normal average values will over time | |
206 | * move less and less towards newly added values this results | |
207 | * that with link tuning, the device can have a very good RSSI | |
208 | * for a few minutes but when the device is moved away from the AP | |
209 | * the average will not decrease fast enough to compensate. | |
210 | * The walking average compensates this and will move towards | |
211 | * the new values correctly allowing a effective link tuning. | |
212 | */ | |
213 | int avg_rssi; | |
214 | int vgc_level; | |
215 | int false_cca; | |
216 | ||
217 | /* | |
218 | * Statistics required for Signal quality calculation. | |
219 | * For calculating the Signal quality we have to determine | |
220 | * the total number of success and failed RX and TX frames. | |
221 | * After that we also use the average RSSI value to help | |
222 | * determining the signal quality. | |
223 | * For the calculation we will use the following algorithm: | |
224 | * | |
225 | * rssi_percentage = (avg_rssi * 100) / rssi_offset | |
226 | * rx_percentage = (rx_success * 100) / rx_total | |
227 | * tx_percentage = (tx_success * 100) / tx_total | |
228 | * avg_signal = ((WEIGHT_RSSI * avg_rssi) + | |
229 | * (WEIGHT_TX * tx_percentage) + | |
230 | * (WEIGHT_RX * rx_percentage)) / 100 | |
231 | * | |
232 | * This value should then be checked to not be greated then 100. | |
233 | */ | |
234 | int rx_percentage; | |
235 | int rx_success; | |
236 | int rx_failed; | |
237 | int tx_percentage; | |
238 | int tx_success; | |
239 | int tx_failed; | |
240 | #define WEIGHT_RSSI 20 | |
241 | #define WEIGHT_RX 40 | |
242 | #define WEIGHT_TX 40 | |
243 | ||
244 | /* | |
245 | * Work structure for scheduling periodic link tuning. | |
246 | */ | |
247 | struct delayed_work work; | |
248 | }; | |
249 | ||
250 | /* | |
251 | * Clear all counters inside the link structure. | |
252 | * This can be easiest achieved by memsetting everything | |
253 | * except for the work structure at the end. | |
254 | */ | |
255 | static inline void rt2x00_clear_link(struct link *link) | |
256 | { | |
257 | memset(link, 0x00, sizeof(*link) - sizeof(link->work)); | |
258 | link->rx_percentage = 50; | |
259 | link->tx_percentage = 50; | |
260 | } | |
261 | ||
262 | /* | |
263 | * Update the rssi using the walking average approach. | |
264 | */ | |
265 | static inline void rt2x00_update_link_rssi(struct link *link, int rssi) | |
266 | { | |
267 | if (!link->avg_rssi) | |
268 | link->avg_rssi = rssi; | |
269 | else | |
270 | link->avg_rssi = ((link->avg_rssi * 7) + rssi) / 8; | |
271 | } | |
272 | ||
273 | /* | |
274 | * When the avg_rssi is unset or no frames have been received), | |
275 | * we need to return the default value which needs to be less | |
276 | * than -80 so the device will select the maximum sensitivity. | |
277 | */ | |
278 | static inline int rt2x00_get_link_rssi(struct link *link) | |
279 | { | |
280 | return (link->avg_rssi && link->rx_success) ? link->avg_rssi : -128; | |
281 | } | |
282 | ||
283 | /* | |
284 | * Interface structure | |
285 | * Configuration details about the current interface. | |
286 | */ | |
287 | struct interface { | |
288 | /* | |
289 | * Interface identification. The value is assigned | |
290 | * to us by the 80211 stack, and is used to request | |
291 | * new beacons. | |
292 | */ | |
293 | int id; | |
294 | ||
295 | /* | |
296 | * Current working type (IEEE80211_IF_TYPE_*). | |
297 | * This excludes the type IEEE80211_IF_TYPE_MNTR | |
298 | * since that is counted seperately in the monitor_count | |
299 | * field. | |
300 | * When set to INVALID_INTERFACE, no interface is configured. | |
301 | */ | |
302 | int type; | |
303 | #define INVALID_INTERFACE IEEE80211_IF_TYPE_MGMT | |
304 | ||
305 | /* | |
306 | * MAC of the device. | |
307 | */ | |
308 | u8 mac[ETH_ALEN]; | |
309 | ||
310 | /* | |
311 | * BBSID of the AP to associate with. | |
312 | */ | |
313 | u8 bssid[ETH_ALEN]; | |
314 | ||
315 | /* | |
316 | * Store the packet filter mode for the current interface. | |
317 | * monitor mode always disabled filtering. But in such | |
318 | * cases we still need to store the value here in case | |
319 | * the monitor mode interfaces are removed, while a | |
320 | * non-monitor mode interface remains. | |
321 | */ | |
322 | unsigned short filter; | |
323 | ||
324 | /* | |
325 | * Monitor mode count, the number of interfaces | |
326 | * in monitor mode that that have been added. | |
327 | */ | |
328 | unsigned short monitor_count; | |
329 | }; | |
330 | ||
331 | static inline int is_interface_present(struct interface *intf) | |
332 | { | |
333 | return !!intf->id; | |
334 | } | |
335 | ||
336 | static inline int is_monitor_present(struct interface *intf) | |
337 | { | |
338 | return !!intf->monitor_count; | |
339 | } | |
340 | ||
341 | /* | |
342 | * Details about the supported modes, rates and channels | |
343 | * of a particular chipset. This is used by rt2x00lib | |
344 | * to build the ieee80211_hw_mode array for mac80211. | |
345 | */ | |
346 | struct hw_mode_spec { | |
347 | /* | |
348 | * Number of modes, rates and channels. | |
349 | */ | |
350 | int num_modes; | |
351 | int num_rates; | |
352 | int num_channels; | |
353 | ||
354 | /* | |
355 | * txpower values. | |
356 | */ | |
357 | const u8 *tx_power_a; | |
358 | const u8 *tx_power_bg; | |
359 | u8 tx_power_default; | |
360 | ||
361 | /* | |
362 | * Device/chipset specific value. | |
363 | */ | |
364 | const struct rf_channel *channels; | |
365 | }; | |
366 | ||
367 | /* | |
368 | * rt2x00lib callback functions. | |
369 | */ | |
370 | struct rt2x00lib_ops { | |
371 | /* | |
372 | * Interrupt handlers. | |
373 | */ | |
374 | irq_handler_t irq_handler; | |
375 | ||
376 | /* | |
377 | * Device init handlers. | |
378 | */ | |
379 | int (*probe_hw) (struct rt2x00_dev *rt2x00dev); | |
380 | char *(*get_firmware_name) (struct rt2x00_dev *rt2x00dev); | |
381 | int (*load_firmware) (struct rt2x00_dev *rt2x00dev, void *data, | |
382 | const size_t len); | |
383 | ||
384 | /* | |
385 | * Device initialization/deinitialization handlers. | |
386 | */ | |
387 | int (*initialize) (struct rt2x00_dev *rt2x00dev); | |
388 | void (*uninitialize) (struct rt2x00_dev *rt2x00dev); | |
389 | ||
390 | /* | |
391 | * Radio control handlers. | |
392 | */ | |
393 | int (*set_device_state) (struct rt2x00_dev *rt2x00dev, | |
394 | enum dev_state state); | |
395 | int (*rfkill_poll) (struct rt2x00_dev *rt2x00dev); | |
396 | void (*link_stats) (struct rt2x00_dev *rt2x00dev); | |
397 | void (*reset_tuner) (struct rt2x00_dev *rt2x00dev); | |
398 | void (*link_tuner) (struct rt2x00_dev *rt2x00dev); | |
399 | ||
400 | /* | |
401 | * TX control handlers | |
402 | */ | |
403 | void (*write_tx_desc) (struct rt2x00_dev *rt2x00dev, | |
404 | struct data_desc *txd, | |
405 | struct data_entry_desc *desc, | |
406 | struct ieee80211_hdr *ieee80211hdr, | |
407 | unsigned int length, | |
408 | struct ieee80211_tx_control *control); | |
409 | int (*write_tx_data) (struct rt2x00_dev *rt2x00dev, | |
410 | struct data_ring *ring, struct sk_buff *skb, | |
411 | struct ieee80211_tx_control *control); | |
412 | void (*kick_tx_queue) (struct rt2x00_dev *rt2x00dev, | |
413 | unsigned int queue); | |
414 | ||
415 | /* | |
416 | * RX control handlers | |
417 | */ | |
418 | int (*fill_rxdone) (struct data_entry *entry, | |
419 | int *signal, int *rssi, int *ofdm, int *size); | |
420 | ||
421 | /* | |
422 | * Configuration handlers. | |
423 | */ | |
424 | void (*config_mac_addr) (struct rt2x00_dev *rt2x00dev, u8 *mac); | |
425 | void (*config_bssid) (struct rt2x00_dev *rt2x00dev, u8 *bssid); | |
426 | void (*config_packet_filter) (struct rt2x00_dev *rt2x00dev, | |
427 | const unsigned int filter); | |
428 | void (*config_type) (struct rt2x00_dev *rt2x00dev, const int type); | |
429 | void (*config) (struct rt2x00_dev *rt2x00dev, const unsigned int flags, | |
430 | struct ieee80211_conf *conf); | |
431 | #define CONFIG_UPDATE_PHYMODE ( 1 << 1 ) | |
432 | #define CONFIG_UPDATE_CHANNEL ( 1 << 2 ) | |
433 | #define CONFIG_UPDATE_TXPOWER ( 1 << 3 ) | |
434 | #define CONFIG_UPDATE_ANTENNA ( 1 << 4 ) | |
435 | #define CONFIG_UPDATE_SLOT_TIME ( 1 << 5 ) | |
436 | #define CONFIG_UPDATE_BEACON_INT ( 1 << 6 ) | |
437 | #define CONFIG_UPDATE_ALL 0xffff | |
438 | }; | |
439 | ||
440 | /* | |
441 | * rt2x00 driver callback operation structure. | |
442 | */ | |
443 | struct rt2x00_ops { | |
444 | const char *name; | |
445 | const unsigned int rxd_size; | |
446 | const unsigned int txd_size; | |
447 | const unsigned int eeprom_size; | |
448 | const unsigned int rf_size; | |
449 | const struct rt2x00lib_ops *lib; | |
450 | const struct ieee80211_ops *hw; | |
451 | #ifdef CONFIG_RT2X00_LIB_DEBUGFS | |
452 | const struct rt2x00debug *debugfs; | |
453 | #endif /* CONFIG_RT2X00_LIB_DEBUGFS */ | |
454 | }; | |
455 | ||
456 | /* | |
457 | * rt2x00 device structure. | |
458 | */ | |
459 | struct rt2x00_dev { | |
460 | /* | |
461 | * Device structure. | |
462 | * The structure stored in here depends on the | |
463 | * system bus (PCI or USB). | |
464 | * When accessing this variable, the rt2x00dev_{pci,usb} | |
465 | * macro's should be used for correct typecasting. | |
466 | */ | |
467 | void *dev; | |
468 | #define rt2x00dev_pci(__dev) ( (struct pci_dev*)(__dev)->dev ) | |
469 | #define rt2x00dev_usb(__dev) ( (struct usb_interface*)(__dev)->dev ) | |
470 | ||
471 | /* | |
472 | * Callback functions. | |
473 | */ | |
474 | const struct rt2x00_ops *ops; | |
475 | ||
476 | /* | |
477 | * IEEE80211 control structure. | |
478 | */ | |
479 | struct ieee80211_hw *hw; | |
480 | struct ieee80211_hw_mode *hwmodes; | |
481 | unsigned int curr_hwmode; | |
482 | #define HWMODE_B 0 | |
483 | #define HWMODE_G 1 | |
484 | #define HWMODE_A 2 | |
485 | ||
486 | /* | |
487 | * rfkill structure for RF state switching support. | |
488 | * This will only be compiled in when required. | |
489 | */ | |
490 | #ifdef CONFIG_RT2X00_LIB_RFKILL | |
491 | struct rfkill *rfkill; | |
492 | struct input_polled_dev *poll_dev; | |
493 | #endif /* CONFIG_RT2X00_LIB_RFKILL */ | |
494 | ||
495 | /* | |
496 | * If enabled, the debugfs interface structures | |
497 | * required for deregistration of debugfs. | |
498 | */ | |
499 | #ifdef CONFIG_RT2X00_LIB_DEBUGFS | |
500 | const struct rt2x00debug_intf *debugfs_intf; | |
501 | #endif /* CONFIG_RT2X00_LIB_DEBUGFS */ | |
502 | ||
503 | /* | |
504 | * Device flags. | |
505 | * In these flags the current status and some | |
506 | * of the device capabilities are stored. | |
507 | */ | |
508 | unsigned long flags; | |
509 | #define DEVICE_ENABLED_RADIO 1 | |
510 | #define DEVICE_ENABLED_RADIO_HW 2 | |
511 | #define DEVICE_INITIALIZED 3 | |
512 | #define DEVICE_INITIALIZED_HW 4 | |
513 | #define REQUIRE_FIRMWARE 5 | |
514 | #define PACKET_FILTER_SCHEDULED 6 | |
515 | #define PACKET_FILTER_PENDING 7 | |
516 | #define INTERFACE_RESUME 8 | |
517 | #define INTERFACE_ENABLED 9 | |
518 | #define INTERFACE_ENABLED_MONITOR 10 | |
519 | #define REQUIRE_BEACON_RING 11 | |
520 | #define DEVICE_SUPPORT_HW_BUTTON 12 | |
521 | #define CONFIG_FRAME_TYPE 13 | |
522 | #define CONFIG_RF_SEQUENCE 14 | |
523 | /* Hole: Add new Flag here */ | |
524 | #define CONFIG_EXTERNAL_LNA_A 16 | |
525 | #define CONFIG_EXTERNAL_LNA_BG 17 | |
526 | #define CONFIG_DOUBLE_ANTENNA 18 | |
527 | #define CONFIG_DISABLE_LINK_TUNING 19 | |
528 | ||
529 | /* | |
530 | * Chipset identification. | |
531 | */ | |
532 | struct rt2x00_chip chip; | |
533 | ||
534 | /* | |
535 | * hw capability specifications. | |
536 | */ | |
537 | struct hw_mode_spec spec; | |
538 | ||
539 | /* | |
540 | * Register pointers | |
541 | * csr_addr: Base register address. (PCI) | |
542 | * csr_cache: CSR cache for usb_control_msg. (USB) | |
543 | */ | |
544 | void __iomem *csr_addr; | |
545 | void *csr_cache; | |
546 | ||
547 | /* | |
548 | * Interface configuration. | |
549 | */ | |
550 | struct interface interface; | |
551 | ||
552 | /* | |
553 | * Link quality | |
554 | */ | |
555 | struct link link; | |
556 | ||
557 | /* | |
558 | * EEPROM data. | |
559 | */ | |
560 | __le16 *eeprom; | |
561 | ||
562 | /* | |
563 | * Active RF register values. | |
564 | * These are stored here so we don't need | |
565 | * to read the rf registers and can directly | |
566 | * use this value instead. | |
567 | * This field should be accessed by using | |
568 | * rt2x00_rf_read() and rt2x00_rf_write(). | |
569 | */ | |
570 | u32 *rf; | |
571 | ||
572 | /* | |
573 | * Current TX power value. | |
574 | */ | |
575 | u16 tx_power; | |
576 | ||
577 | /* | |
578 | * LED register (for rt61pci & rt73usb). | |
579 | */ | |
580 | u16 led_reg; | |
581 | ||
582 | /* | |
583 | * Led mode (LED_MODE_*) | |
584 | */ | |
585 | u8 led_mode; | |
586 | ||
587 | /* | |
588 | * Rssi <-> Dbm offset | |
589 | */ | |
590 | u8 rssi_offset; | |
591 | ||
592 | /* | |
593 | * Frequency offset (for rt61pci & rt73usb). | |
594 | */ | |
595 | u8 freq_offset; | |
596 | ||
597 | /* | |
598 | * Low level statistics which will have | |
599 | * to be kept up to date while device is running. | |
600 | */ | |
601 | struct ieee80211_low_level_stats low_level_stats; | |
602 | ||
603 | /* | |
604 | * RX configuration information. | |
605 | */ | |
606 | struct ieee80211_rx_status rx_status; | |
607 | ||
608 | /* | |
609 | * Beacon scheduled work. | |
610 | */ | |
611 | struct work_struct beacon_work; | |
612 | ||
613 | /* | |
614 | * Data ring arrays for RX, TX and Beacon. | |
615 | * The Beacon array also contains the Atim ring | |
616 | * if that is supported by the device. | |
617 | */ | |
618 | int data_rings; | |
619 | struct data_ring *rx; | |
620 | struct data_ring *tx; | |
621 | struct data_ring *bcn; | |
622 | ||
623 | /* | |
624 | * Firmware image. | |
625 | */ | |
626 | const struct firmware *fw; | |
627 | }; | |
628 | ||
629 | /* | |
630 | * For-each loop for the ring array. | |
631 | * All rings have been allocated as a single array, | |
632 | * this means we can create a very simply loop macro | |
633 | * that is capable of looping through all rings. | |
634 | * ring_end(), txring_end() and ring_loop() are helper macro's which | |
635 | * should not be used directly. Instead the following should be used: | |
636 | * ring_for_each() - Loops through all rings (RX, TX, Beacon & Atim) | |
637 | * txring_for_each() - Loops through TX data rings (TX only) | |
638 | * txringall_for_each() - Loops through all TX rings (TX, Beacon & Atim) | |
639 | */ | |
640 | #define ring_end(__dev) \ | |
641 | &(__dev)->rx[(__dev)->data_rings] | |
642 | ||
643 | #define txring_end(__dev) \ | |
644 | &(__dev)->tx[(__dev)->hw->queues] | |
645 | ||
646 | #define ring_loop(__entry, __start, __end) \ | |
647 | for ((__entry) = (__start); \ | |
648 | prefetch(&(__entry)[1]), (__entry) != (__end); \ | |
649 | (__entry) = &(__entry)[1]) | |
650 | ||
651 | #define ring_for_each(__dev, __entry) \ | |
652 | ring_loop(__entry, (__dev)->rx, ring_end(__dev)) | |
653 | ||
654 | #define txring_for_each(__dev, __entry) \ | |
655 | ring_loop(__entry, (__dev)->tx, txring_end(__dev)) | |
656 | ||
657 | #define txringall_for_each(__dev, __entry) \ | |
658 | ring_loop(__entry, (__dev)->tx, ring_end(__dev)) | |
659 | ||
660 | /* | |
661 | * Generic RF access. | |
662 | * The RF is being accessed by word index. | |
663 | */ | |
664 | static inline void rt2x00_rf_read(const struct rt2x00_dev *rt2x00dev, | |
665 | const unsigned int word, u32 *data) | |
666 | { | |
667 | *data = rt2x00dev->rf[word]; | |
668 | } | |
669 | ||
670 | static inline void rt2x00_rf_write(const struct rt2x00_dev *rt2x00dev, | |
671 | const unsigned int word, u32 data) | |
672 | { | |
673 | rt2x00dev->rf[word] = data; | |
674 | } | |
675 | ||
676 | /* | |
677 | * Generic EEPROM access. | |
678 | * The EEPROM is being accessed by word index. | |
679 | */ | |
680 | static inline void *rt2x00_eeprom_addr(const struct rt2x00_dev *rt2x00dev, | |
681 | const unsigned int word) | |
682 | { | |
683 | return (void *)&rt2x00dev->eeprom[word]; | |
684 | } | |
685 | ||
686 | static inline void rt2x00_eeprom_read(const struct rt2x00_dev *rt2x00dev, | |
687 | const unsigned int word, u16 *data) | |
688 | { | |
689 | *data = le16_to_cpu(rt2x00dev->eeprom[word]); | |
690 | } | |
691 | ||
692 | static inline void rt2x00_eeprom_write(const struct rt2x00_dev *rt2x00dev, | |
693 | const unsigned int word, u16 data) | |
694 | { | |
695 | rt2x00dev->eeprom[word] = cpu_to_le16(data); | |
696 | } | |
697 | ||
698 | /* | |
699 | * Chipset handlers | |
700 | */ | |
701 | static inline void rt2x00_set_chip(struct rt2x00_dev *rt2x00dev, | |
702 | const u16 rt, const u16 rf, const u32 rev) | |
703 | { | |
704 | INFO(rt2x00dev, | |
705 | "Chipset detected - rt: %04x, rf: %04x, rev: %08x.\n", | |
706 | rt, rf, rev); | |
707 | ||
708 | rt2x00dev->chip.rt = rt; | |
709 | rt2x00dev->chip.rf = rf; | |
710 | rt2x00dev->chip.rev = rev; | |
711 | } | |
712 | ||
713 | static inline char rt2x00_rt(const struct rt2x00_chip *chipset, const u16 chip) | |
714 | { | |
715 | return (chipset->rt == chip); | |
716 | } | |
717 | ||
718 | static inline char rt2x00_rf(const struct rt2x00_chip *chipset, const u16 chip) | |
719 | { | |
720 | return (chipset->rf == chip); | |
721 | } | |
722 | ||
723 | static inline u16 rt2x00_get_rev(const struct rt2x00_chip *chipset) | |
724 | { | |
725 | return chipset->rev; | |
726 | } | |
727 | ||
728 | static inline u16 rt2x00_rev(const struct rt2x00_chip *chipset, const u32 mask) | |
729 | { | |
730 | return chipset->rev & mask; | |
731 | } | |
732 | ||
733 | /* | |
734 | * Duration calculations | |
735 | * The rate variable passed is: 100kbs. | |
736 | * To convert from bytes to bits we multiply size with 8, | |
737 | * then the size is multiplied with 10 to make the | |
738 | * real rate -> rate argument correction. | |
739 | */ | |
740 | static inline u16 get_duration(const unsigned int size, const u8 rate) | |
741 | { | |
742 | return ((size * 8 * 10) / rate); | |
743 | } | |
744 | ||
745 | static inline u16 get_duration_res(const unsigned int size, const u8 rate) | |
746 | { | |
747 | return ((size * 8 * 10) % rate); | |
748 | } | |
749 | ||
750 | /* | |
751 | * Library functions. | |
752 | */ | |
753 | struct data_ring *rt2x00lib_get_ring(struct rt2x00_dev *rt2x00dev, | |
754 | const unsigned int queue); | |
755 | ||
756 | /* | |
757 | * Interrupt context handlers. | |
758 | */ | |
759 | void rt2x00lib_beacondone(struct rt2x00_dev *rt2x00dev); | |
760 | void rt2x00lib_txdone(struct data_entry *entry, | |
761 | const int status, const int retry); | |
762 | void rt2x00lib_rxdone(struct data_entry *entry, struct sk_buff *skb, | |
763 | const int signal, const int rssi, const int ofdm); | |
764 | ||
765 | /* | |
766 | * TX descriptor initializer | |
767 | */ | |
768 | void rt2x00lib_write_tx_desc(struct rt2x00_dev *rt2x00dev, | |
769 | struct data_desc *txd, | |
770 | struct ieee80211_hdr *ieee80211hdr, | |
771 | unsigned int length, | |
772 | struct ieee80211_tx_control *control); | |
773 | ||
774 | /* | |
775 | * mac80211 handlers. | |
776 | */ | |
777 | int rt2x00mac_tx(struct ieee80211_hw *hw, struct sk_buff *skb, | |
778 | struct ieee80211_tx_control *control); | |
779 | int rt2x00mac_start(struct ieee80211_hw *hw); | |
780 | void rt2x00mac_stop(struct ieee80211_hw *hw); | |
781 | int rt2x00mac_add_interface(struct ieee80211_hw *hw, | |
782 | struct ieee80211_if_init_conf *conf); | |
783 | void rt2x00mac_remove_interface(struct ieee80211_hw *hw, | |
784 | struct ieee80211_if_init_conf *conf); | |
785 | int rt2x00mac_config(struct ieee80211_hw *hw, struct ieee80211_conf *conf); | |
786 | int rt2x00mac_config_interface(struct ieee80211_hw *hw, int if_id, | |
787 | struct ieee80211_if_conf *conf); | |
788 | void rt2x00mac_set_multicast_list(struct ieee80211_hw *hw, | |
789 | unsigned short flags, int mc_count); | |
790 | int rt2x00mac_get_stats(struct ieee80211_hw *hw, | |
791 | struct ieee80211_low_level_stats *stats); | |
792 | int rt2x00mac_get_tx_stats(struct ieee80211_hw *hw, | |
793 | struct ieee80211_tx_queue_stats *stats); | |
794 | int rt2x00mac_conf_tx(struct ieee80211_hw *hw, int queue, | |
795 | const struct ieee80211_tx_queue_params *params); | |
796 | ||
797 | /* | |
798 | * Driver allocation handlers. | |
799 | */ | |
800 | int rt2x00lib_probe_dev(struct rt2x00_dev *rt2x00dev); | |
801 | void rt2x00lib_remove_dev(struct rt2x00_dev *rt2x00dev); | |
802 | #ifdef CONFIG_PM | |
803 | int rt2x00lib_suspend(struct rt2x00_dev *rt2x00dev, pm_message_t state); | |
804 | int rt2x00lib_resume(struct rt2x00_dev *rt2x00dev); | |
805 | #endif /* CONFIG_PM */ | |
806 | ||
807 | #endif /* RT2X00_H */ |