rt2x00: Unconstify rt2x00dev
[linux-2.6.git] / drivers / net / wireless / rt2x00 / rt2500usb.c
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: rt2500usb
23         Abstract: rt2500usb device specific routines.
24         Supported chipsets: RT2570.
25  */
26
27 /*
28  * Set enviroment defines for rt2x00.h
29  */
30 #define DRV_NAME "rt2500usb"
31
32 #include <linux/delay.h>
33 #include <linux/etherdevice.h>
34 #include <linux/init.h>
35 #include <linux/kernel.h>
36 #include <linux/module.h>
37 #include <linux/usb.h>
38
39 #include "rt2x00.h"
40 #include "rt2x00usb.h"
41 #include "rt2500usb.h"
42
43 /*
44  * Register access.
45  * All access to the CSR registers will go through the methods
46  * rt2500usb_register_read and rt2500usb_register_write.
47  * BBP and RF register require indirect register access,
48  * and use the CSR registers BBPCSR and RFCSR to achieve this.
49  * These indirect registers work with busy bits,
50  * and we will try maximal REGISTER_BUSY_COUNT times to access
51  * the register while taking a REGISTER_BUSY_DELAY us delay
52  * between each attampt. When the busy bit is still set at that time,
53  * the access attempt is considered to have failed,
54  * and we will print an error.
55  */
56 static inline void rt2500usb_register_read(struct rt2x00_dev *rt2x00dev,
57                                            const unsigned int offset,
58                                            u16 *value)
59 {
60         __le16 reg;
61         rt2x00usb_vendor_request_buff(rt2x00dev, USB_MULTI_READ,
62                                       USB_VENDOR_REQUEST_IN, offset,
63                                       &reg, sizeof(u16), REGISTER_TIMEOUT);
64         *value = le16_to_cpu(reg);
65 }
66
67 static inline void rt2500usb_register_multiread(struct rt2x00_dev *rt2x00dev,
68                                                 const unsigned int offset,
69                                                 void *value, const u16 length)
70 {
71         int timeout = REGISTER_TIMEOUT * (length / sizeof(u16));
72         rt2x00usb_vendor_request_buff(rt2x00dev, USB_MULTI_READ,
73                                       USB_VENDOR_REQUEST_IN, offset,
74                                       value, length, timeout);
75 }
76
77 static inline void rt2500usb_register_write(struct rt2x00_dev *rt2x00dev,
78                                             const unsigned int offset,
79                                             u16 value)
80 {
81         __le16 reg = cpu_to_le16(value);
82         rt2x00usb_vendor_request_buff(rt2x00dev, USB_MULTI_WRITE,
83                                       USB_VENDOR_REQUEST_OUT, offset,
84                                       &reg, sizeof(u16), REGISTER_TIMEOUT);
85 }
86
87 static inline void rt2500usb_register_multiwrite(struct rt2x00_dev *rt2x00dev,
88                                                  const unsigned int offset,
89                                                  void *value, const u16 length)
90 {
91         int timeout = REGISTER_TIMEOUT * (length / sizeof(u16));
92         rt2x00usb_vendor_request_buff(rt2x00dev, USB_MULTI_WRITE,
93                                       USB_VENDOR_REQUEST_OUT, offset,
94                                       value, length, timeout);
95 }
96
97 static u16 rt2500usb_bbp_check(struct rt2x00_dev *rt2x00dev)
98 {
99         u16 reg;
100         unsigned int i;
101
102         for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
103                 rt2500usb_register_read(rt2x00dev, PHY_CSR8, &reg);
104                 if (!rt2x00_get_field16(reg, PHY_CSR8_BUSY))
105                         break;
106                 udelay(REGISTER_BUSY_DELAY);
107         }
108
109         return reg;
110 }
111
112 static void rt2500usb_bbp_write(struct rt2x00_dev *rt2x00dev,
113                                 const unsigned int word, const u8 value)
114 {
115         u16 reg;
116
117         /*
118          * Wait until the BBP becomes ready.
119          */
120         reg = rt2500usb_bbp_check(rt2x00dev);
121         if (rt2x00_get_field16(reg, PHY_CSR8_BUSY)) {
122                 ERROR(rt2x00dev, "PHY_CSR8 register busy. Write failed.\n");
123                 return;
124         }
125
126         /*
127          * Write the data into the BBP.
128          */
129         reg = 0;
130         rt2x00_set_field16(&reg, PHY_CSR7_DATA, value);
131         rt2x00_set_field16(&reg, PHY_CSR7_REG_ID, word);
132         rt2x00_set_field16(&reg, PHY_CSR7_READ_CONTROL, 0);
133
134         rt2500usb_register_write(rt2x00dev, PHY_CSR7, reg);
135 }
136
137 static void rt2500usb_bbp_read(struct rt2x00_dev *rt2x00dev,
138                                const unsigned int word, u8 *value)
139 {
140         u16 reg;
141
142         /*
143          * Wait until the BBP becomes ready.
144          */
145         reg = rt2500usb_bbp_check(rt2x00dev);
146         if (rt2x00_get_field16(reg, PHY_CSR8_BUSY)) {
147                 ERROR(rt2x00dev, "PHY_CSR8 register busy. Read failed.\n");
148                 return;
149         }
150
151         /*
152          * Write the request into the BBP.
153          */
154         reg = 0;
155         rt2x00_set_field16(&reg, PHY_CSR7_REG_ID, word);
156         rt2x00_set_field16(&reg, PHY_CSR7_READ_CONTROL, 1);
157
158         rt2500usb_register_write(rt2x00dev, PHY_CSR7, reg);
159
160         /*
161          * Wait until the BBP becomes ready.
162          */
163         reg = rt2500usb_bbp_check(rt2x00dev);
164         if (rt2x00_get_field16(reg, PHY_CSR8_BUSY)) {
165                 ERROR(rt2x00dev, "PHY_CSR8 register busy. Read failed.\n");
166                 *value = 0xff;
167                 return;
168         }
169
170         rt2500usb_register_read(rt2x00dev, PHY_CSR7, &reg);
171         *value = rt2x00_get_field16(reg, PHY_CSR7_DATA);
172 }
173
174 static void rt2500usb_rf_write(struct rt2x00_dev *rt2x00dev,
175                                const unsigned int word, const u32 value)
176 {
177         u16 reg;
178         unsigned int i;
179
180         if (!word)
181                 return;
182
183         for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
184                 rt2500usb_register_read(rt2x00dev, PHY_CSR10, &reg);
185                 if (!rt2x00_get_field16(reg, PHY_CSR10_RF_BUSY))
186                         goto rf_write;
187                 udelay(REGISTER_BUSY_DELAY);
188         }
189
190         ERROR(rt2x00dev, "PHY_CSR10 register busy. Write failed.\n");
191         return;
192
193 rf_write:
194         reg = 0;
195         rt2x00_set_field16(&reg, PHY_CSR9_RF_VALUE, value);
196         rt2500usb_register_write(rt2x00dev, PHY_CSR9, reg);
197
198         reg = 0;
199         rt2x00_set_field16(&reg, PHY_CSR10_RF_VALUE, value >> 16);
200         rt2x00_set_field16(&reg, PHY_CSR10_RF_NUMBER_OF_BITS, 20);
201         rt2x00_set_field16(&reg, PHY_CSR10_RF_IF_SELECT, 0);
202         rt2x00_set_field16(&reg, PHY_CSR10_RF_BUSY, 1);
203
204         rt2500usb_register_write(rt2x00dev, PHY_CSR10, reg);
205         rt2x00_rf_write(rt2x00dev, word, value);
206 }
207
208 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
209 #define CSR_OFFSET(__word)      ( CSR_REG_BASE + ((__word) * sizeof(u16)) )
210
211 static void rt2500usb_read_csr(struct rt2x00_dev *rt2x00dev,
212                                const unsigned int word, u32 *data)
213 {
214         rt2500usb_register_read(rt2x00dev, CSR_OFFSET(word), (u16 *) data);
215 }
216
217 static void rt2500usb_write_csr(struct rt2x00_dev *rt2x00dev,
218                                 const unsigned int word, u32 data)
219 {
220         rt2500usb_register_write(rt2x00dev, CSR_OFFSET(word), data);
221 }
222
223 static const struct rt2x00debug rt2500usb_rt2x00debug = {
224         .owner  = THIS_MODULE,
225         .csr    = {
226                 .read           = rt2500usb_read_csr,
227                 .write          = rt2500usb_write_csr,
228                 .word_size      = sizeof(u16),
229                 .word_count     = CSR_REG_SIZE / sizeof(u16),
230         },
231         .eeprom = {
232                 .read           = rt2x00_eeprom_read,
233                 .write          = rt2x00_eeprom_write,
234                 .word_size      = sizeof(u16),
235                 .word_count     = EEPROM_SIZE / sizeof(u16),
236         },
237         .bbp    = {
238                 .read           = rt2500usb_bbp_read,
239                 .write          = rt2500usb_bbp_write,
240                 .word_size      = sizeof(u8),
241                 .word_count     = BBP_SIZE / sizeof(u8),
242         },
243         .rf     = {
244                 .read           = rt2x00_rf_read,
245                 .write          = rt2500usb_rf_write,
246                 .word_size      = sizeof(u32),
247                 .word_count     = RF_SIZE / sizeof(u32),
248         },
249 };
250 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
251
252 /*
253  * Configuration handlers.
254  */
255 static void rt2500usb_config_mac_addr(struct rt2x00_dev *rt2x00dev,
256                                       __le32 *mac)
257 {
258         rt2500usb_register_multiwrite(rt2x00dev, MAC_CSR2, mac,
259                                       (3 * sizeof(__le16)));
260 }
261
262 static void rt2500usb_config_bssid(struct rt2x00_dev *rt2x00dev,
263                                    __le32 *bssid)
264 {
265         rt2500usb_register_multiwrite(rt2x00dev, MAC_CSR5, bssid,
266                                       (3 * sizeof(__le16)));
267 }
268
269 static void rt2500usb_config_type(struct rt2x00_dev *rt2x00dev, const int type,
270                                   const int tsf_sync)
271 {
272         u16 reg;
273
274         rt2500usb_register_write(rt2x00dev, TXRX_CSR19, 0);
275
276         /*
277          * Enable beacon config
278          */
279         rt2500usb_register_read(rt2x00dev, TXRX_CSR20, &reg);
280         rt2x00_set_field16(&reg, TXRX_CSR20_OFFSET,
281                            (PREAMBLE + get_duration(IEEE80211_HEADER, 20)) >> 6);
282         if (type == IEEE80211_IF_TYPE_STA)
283                 rt2x00_set_field16(&reg, TXRX_CSR20_BCN_EXPECT_WINDOW, 0);
284         else
285                 rt2x00_set_field16(&reg, TXRX_CSR20_BCN_EXPECT_WINDOW, 2);
286         rt2500usb_register_write(rt2x00dev, TXRX_CSR20, reg);
287
288         /*
289          * Enable synchronisation.
290          */
291         rt2500usb_register_read(rt2x00dev, TXRX_CSR18, &reg);
292         rt2x00_set_field16(&reg, TXRX_CSR18_OFFSET, 0);
293         rt2500usb_register_write(rt2x00dev, TXRX_CSR18, reg);
294
295         rt2500usb_register_read(rt2x00dev, TXRX_CSR19, &reg);
296         rt2x00_set_field16(&reg, TXRX_CSR19_TSF_COUNT, 1);
297         rt2x00_set_field16(&reg, TXRX_CSR19_TBCN, 1);
298         rt2x00_set_field16(&reg, TXRX_CSR19_BEACON_GEN, 0);
299         rt2x00_set_field16(&reg, TXRX_CSR19_TSF_SYNC, tsf_sync);
300         rt2500usb_register_write(rt2x00dev, TXRX_CSR19, reg);
301 }
302
303 static void rt2500usb_config_preamble(struct rt2x00_dev *rt2x00dev,
304                                       const int short_preamble,
305                                       const int ack_timeout,
306                                       const int ack_consume_time)
307 {
308         u16 reg;
309
310         /*
311          * When in atomic context, reschedule and let rt2x00lib
312          * call this function again.
313          */
314         if (in_atomic()) {
315                 queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->config_work);
316                 return;
317         }
318
319         rt2500usb_register_read(rt2x00dev, TXRX_CSR1, &reg);
320         rt2x00_set_field16(&reg, TXRX_CSR1_ACK_TIMEOUT, ack_timeout);
321         rt2500usb_register_write(rt2x00dev, TXRX_CSR1, reg);
322
323         rt2500usb_register_read(rt2x00dev, TXRX_CSR10, &reg);
324         rt2x00_set_field16(&reg, TXRX_CSR10_AUTORESPOND_PREAMBLE,
325                            !!short_preamble);
326         rt2500usb_register_write(rt2x00dev, TXRX_CSR10, reg);
327 }
328
329 static void rt2500usb_config_phymode(struct rt2x00_dev *rt2x00dev,
330                                      const int phymode,
331                                      const int basic_rate_mask)
332 {
333         rt2500usb_register_write(rt2x00dev, TXRX_CSR11, basic_rate_mask);
334
335         if (phymode == HWMODE_B) {
336                 rt2500usb_register_write(rt2x00dev, MAC_CSR11, 0x000b);
337                 rt2500usb_register_write(rt2x00dev, MAC_CSR12, 0x0040);
338         } else {
339                 rt2500usb_register_write(rt2x00dev, MAC_CSR11, 0x0005);
340                 rt2500usb_register_write(rt2x00dev, MAC_CSR12, 0x016c);
341         }
342 }
343
344 static void rt2500usb_config_channel(struct rt2x00_dev *rt2x00dev,
345                                      struct rf_channel *rf, const int txpower)
346 {
347         /*
348          * Set TXpower.
349          */
350         rt2x00_set_field32(&rf->rf3, RF3_TXPOWER, TXPOWER_TO_DEV(txpower));
351
352         /*
353          * For RT2525E we should first set the channel to half band higher.
354          */
355         if (rt2x00_rf(&rt2x00dev->chip, RF2525E)) {
356                 static const u32 vals[] = {
357                         0x000008aa, 0x000008ae, 0x000008ae, 0x000008b2,
358                         0x000008b2, 0x000008b6, 0x000008b6, 0x000008ba,
359                         0x000008ba, 0x000008be, 0x000008b7, 0x00000902,
360                         0x00000902, 0x00000906
361                 };
362
363                 rt2500usb_rf_write(rt2x00dev, 2, vals[rf->channel - 1]);
364                 if (rf->rf4)
365                         rt2500usb_rf_write(rt2x00dev, 4, rf->rf4);
366         }
367
368         rt2500usb_rf_write(rt2x00dev, 1, rf->rf1);
369         rt2500usb_rf_write(rt2x00dev, 2, rf->rf2);
370         rt2500usb_rf_write(rt2x00dev, 3, rf->rf3);
371         if (rf->rf4)
372                 rt2500usb_rf_write(rt2x00dev, 4, rf->rf4);
373 }
374
375 static void rt2500usb_config_txpower(struct rt2x00_dev *rt2x00dev,
376                                      const int txpower)
377 {
378         u32 rf3;
379
380         rt2x00_rf_read(rt2x00dev, 3, &rf3);
381         rt2x00_set_field32(&rf3, RF3_TXPOWER, TXPOWER_TO_DEV(txpower));
382         rt2500usb_rf_write(rt2x00dev, 3, rf3);
383 }
384
385 static void rt2500usb_config_antenna(struct rt2x00_dev *rt2x00dev,
386                                      struct antenna_setup *ant)
387 {
388         u8 r2;
389         u8 r14;
390         u16 csr5;
391         u16 csr6;
392
393         rt2500usb_bbp_read(rt2x00dev, 2, &r2);
394         rt2500usb_bbp_read(rt2x00dev, 14, &r14);
395         rt2500usb_register_read(rt2x00dev, PHY_CSR5, &csr5);
396         rt2500usb_register_read(rt2x00dev, PHY_CSR6, &csr6);
397
398         /*
399          * Configure the TX antenna.
400          */
401         switch (ant->tx) {
402         case ANTENNA_HW_DIVERSITY:
403                 rt2x00_set_field8(&r2, BBP_R2_TX_ANTENNA, 1);
404                 rt2x00_set_field16(&csr5, PHY_CSR5_CCK, 1);
405                 rt2x00_set_field16(&csr6, PHY_CSR6_OFDM, 1);
406                 break;
407         case ANTENNA_A:
408                 rt2x00_set_field8(&r2, BBP_R2_TX_ANTENNA, 0);
409                 rt2x00_set_field16(&csr5, PHY_CSR5_CCK, 0);
410                 rt2x00_set_field16(&csr6, PHY_CSR6_OFDM, 0);
411                 break;
412         case ANTENNA_SW_DIVERSITY:
413                 /*
414                  * NOTE: We should never come here because rt2x00lib is
415                  * supposed to catch this and send us the correct antenna
416                  * explicitely. However we are nog going to bug about this.
417                  * Instead, just default to antenna B.
418                  */
419         case ANTENNA_B:
420                 rt2x00_set_field8(&r2, BBP_R2_TX_ANTENNA, 2);
421                 rt2x00_set_field16(&csr5, PHY_CSR5_CCK, 2);
422                 rt2x00_set_field16(&csr6, PHY_CSR6_OFDM, 2);
423                 break;
424         }
425
426         /*
427          * Configure the RX antenna.
428          */
429         switch (ant->rx) {
430         case ANTENNA_HW_DIVERSITY:
431                 rt2x00_set_field8(&r14, BBP_R14_RX_ANTENNA, 1);
432                 break;
433         case ANTENNA_A:
434                 rt2x00_set_field8(&r14, BBP_R14_RX_ANTENNA, 0);
435                 break;
436         case ANTENNA_SW_DIVERSITY:
437                 /*
438                  * NOTE: We should never come here because rt2x00lib is
439                  * supposed to catch this and send us the correct antenna
440                  * explicitely. However we are nog going to bug about this.
441                  * Instead, just default to antenna B.
442                  */
443         case ANTENNA_B:
444                 rt2x00_set_field8(&r14, BBP_R14_RX_ANTENNA, 2);
445                 break;
446         }
447
448         /*
449          * RT2525E and RT5222 need to flip TX I/Q
450          */
451         if (rt2x00_rf(&rt2x00dev->chip, RF2525E) ||
452             rt2x00_rf(&rt2x00dev->chip, RF5222)) {
453                 rt2x00_set_field8(&r2, BBP_R2_TX_IQ_FLIP, 1);
454                 rt2x00_set_field16(&csr5, PHY_CSR5_CCK_FLIP, 1);
455                 rt2x00_set_field16(&csr6, PHY_CSR6_OFDM_FLIP, 1);
456
457                 /*
458                  * RT2525E does not need RX I/Q Flip.
459                  */
460                 if (rt2x00_rf(&rt2x00dev->chip, RF2525E))
461                         rt2x00_set_field8(&r14, BBP_R14_RX_IQ_FLIP, 0);
462         } else {
463                 rt2x00_set_field16(&csr5, PHY_CSR5_CCK_FLIP, 0);
464                 rt2x00_set_field16(&csr6, PHY_CSR6_OFDM_FLIP, 0);
465         }
466
467         rt2500usb_bbp_write(rt2x00dev, 2, r2);
468         rt2500usb_bbp_write(rt2x00dev, 14, r14);
469         rt2500usb_register_write(rt2x00dev, PHY_CSR5, csr5);
470         rt2500usb_register_write(rt2x00dev, PHY_CSR6, csr6);
471 }
472
473 static void rt2500usb_config_duration(struct rt2x00_dev *rt2x00dev,
474                                       struct rt2x00lib_conf *libconf)
475 {
476         u16 reg;
477
478         rt2500usb_register_write(rt2x00dev, MAC_CSR10, libconf->slot_time);
479
480         rt2500usb_register_read(rt2x00dev, TXRX_CSR18, &reg);
481         rt2x00_set_field16(&reg, TXRX_CSR18_INTERVAL,
482                            libconf->conf->beacon_int * 4);
483         rt2500usb_register_write(rt2x00dev, TXRX_CSR18, reg);
484 }
485
486 static void rt2500usb_config(struct rt2x00_dev *rt2x00dev,
487                              const unsigned int flags,
488                              struct rt2x00lib_conf *libconf)
489 {
490         if (flags & CONFIG_UPDATE_PHYMODE)
491                 rt2500usb_config_phymode(rt2x00dev, libconf->phymode,
492                                          libconf->basic_rates);
493         if (flags & CONFIG_UPDATE_CHANNEL)
494                 rt2500usb_config_channel(rt2x00dev, &libconf->rf,
495                                          libconf->conf->power_level);
496         if ((flags & CONFIG_UPDATE_TXPOWER) && !(flags & CONFIG_UPDATE_CHANNEL))
497                 rt2500usb_config_txpower(rt2x00dev,
498                                          libconf->conf->power_level);
499         if (flags & CONFIG_UPDATE_ANTENNA)
500                 rt2500usb_config_antenna(rt2x00dev, &libconf->ant);
501         if (flags & (CONFIG_UPDATE_SLOT_TIME | CONFIG_UPDATE_BEACON_INT))
502                 rt2500usb_config_duration(rt2x00dev, libconf);
503 }
504
505 /*
506  * LED functions.
507  */
508 static void rt2500usb_enable_led(struct rt2x00_dev *rt2x00dev)
509 {
510         u16 reg;
511
512         rt2500usb_register_read(rt2x00dev, MAC_CSR21, &reg);
513         rt2x00_set_field16(&reg, MAC_CSR21_ON_PERIOD, 70);
514         rt2x00_set_field16(&reg, MAC_CSR21_OFF_PERIOD, 30);
515         rt2500usb_register_write(rt2x00dev, MAC_CSR21, reg);
516
517         rt2500usb_register_read(rt2x00dev, MAC_CSR20, &reg);
518         rt2x00_set_field16(&reg, MAC_CSR20_LINK,
519                            (rt2x00dev->led_mode != LED_MODE_ASUS));
520         rt2x00_set_field16(&reg, MAC_CSR20_ACTIVITY,
521                            (rt2x00dev->led_mode != LED_MODE_TXRX_ACTIVITY));
522         rt2500usb_register_write(rt2x00dev, MAC_CSR20, reg);
523 }
524
525 static void rt2500usb_disable_led(struct rt2x00_dev *rt2x00dev)
526 {
527         u16 reg;
528
529         rt2500usb_register_read(rt2x00dev, MAC_CSR20, &reg);
530         rt2x00_set_field16(&reg, MAC_CSR20_LINK, 0);
531         rt2x00_set_field16(&reg, MAC_CSR20_ACTIVITY, 0);
532         rt2500usb_register_write(rt2x00dev, MAC_CSR20, reg);
533 }
534
535 /*
536  * Link tuning
537  */
538 static void rt2500usb_link_stats(struct rt2x00_dev *rt2x00dev,
539                                  struct link_qual *qual)
540 {
541         u16 reg;
542
543         /*
544          * Update FCS error count from register.
545          */
546         rt2500usb_register_read(rt2x00dev, STA_CSR0, &reg);
547         qual->rx_failed = rt2x00_get_field16(reg, STA_CSR0_FCS_ERROR);
548
549         /*
550          * Update False CCA count from register.
551          */
552         rt2500usb_register_read(rt2x00dev, STA_CSR3, &reg);
553         qual->false_cca = rt2x00_get_field16(reg, STA_CSR3_FALSE_CCA_ERROR);
554 }
555
556 static void rt2500usb_reset_tuner(struct rt2x00_dev *rt2x00dev)
557 {
558         u16 eeprom;
559         u16 value;
560
561         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R24, &eeprom);
562         value = rt2x00_get_field16(eeprom, EEPROM_BBPTUNE_R24_LOW);
563         rt2500usb_bbp_write(rt2x00dev, 24, value);
564
565         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R25, &eeprom);
566         value = rt2x00_get_field16(eeprom, EEPROM_BBPTUNE_R25_LOW);
567         rt2500usb_bbp_write(rt2x00dev, 25, value);
568
569         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R61, &eeprom);
570         value = rt2x00_get_field16(eeprom, EEPROM_BBPTUNE_R61_LOW);
571         rt2500usb_bbp_write(rt2x00dev, 61, value);
572
573         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_VGC, &eeprom);
574         value = rt2x00_get_field16(eeprom, EEPROM_BBPTUNE_VGCUPPER);
575         rt2500usb_bbp_write(rt2x00dev, 17, value);
576
577         rt2x00dev->link.vgc_level = value;
578 }
579
580 static void rt2500usb_link_tuner(struct rt2x00_dev *rt2x00dev)
581 {
582         int rssi = rt2x00_get_link_rssi(&rt2x00dev->link);
583         u16 bbp_thresh;
584         u16 vgc_bound;
585         u16 sens;
586         u16 r24;
587         u16 r25;
588         u16 r61;
589         u16 r17_sens;
590         u8 r17;
591         u8 up_bound;
592         u8 low_bound;
593
594         /*
595          * Determine the BBP tuning threshold and correctly
596          * set BBP 24, 25 and 61.
597          */
598         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE, &bbp_thresh);
599         bbp_thresh = rt2x00_get_field16(bbp_thresh, EEPROM_BBPTUNE_THRESHOLD);
600
601         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R24, &r24);
602         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R25, &r25);
603         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R61, &r61);
604
605         if ((rssi + bbp_thresh) > 0) {
606                 r24 = rt2x00_get_field16(r24, EEPROM_BBPTUNE_R24_HIGH);
607                 r25 = rt2x00_get_field16(r25, EEPROM_BBPTUNE_R25_HIGH);
608                 r61 = rt2x00_get_field16(r61, EEPROM_BBPTUNE_R61_HIGH);
609         } else {
610                 r24 = rt2x00_get_field16(r24, EEPROM_BBPTUNE_R24_LOW);
611                 r25 = rt2x00_get_field16(r25, EEPROM_BBPTUNE_R25_LOW);
612                 r61 = rt2x00_get_field16(r61, EEPROM_BBPTUNE_R61_LOW);
613         }
614
615         rt2500usb_bbp_write(rt2x00dev, 24, r24);
616         rt2500usb_bbp_write(rt2x00dev, 25, r25);
617         rt2500usb_bbp_write(rt2x00dev, 61, r61);
618
619         /*
620          * Read current r17 value, as well as the sensitivity values
621          * for the r17 register.
622          */
623         rt2500usb_bbp_read(rt2x00dev, 17, &r17);
624         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R17, &r17_sens);
625
626         /*
627          * A too low RSSI will cause too much false CCA which will
628          * then corrupt the R17 tuning. To remidy this the tuning should
629          * be stopped (While making sure the R17 value will not exceed limits)
630          */
631         if (rssi >= -40) {
632                 if (r17 != 0x60)
633                         rt2500usb_bbp_write(rt2x00dev, 17, 0x60);
634                 return;
635         }
636
637         /*
638          * Special big-R17 for short distance
639          */
640         if (rssi >= -58) {
641                 sens = rt2x00_get_field16(r17_sens, EEPROM_BBPTUNE_R17_LOW);
642                 if (r17 != sens)
643                         rt2500usb_bbp_write(rt2x00dev, 17, sens);
644                 return;
645         }
646
647         /*
648          * Special mid-R17 for middle distance
649          */
650         if (rssi >= -74) {
651                 sens = rt2x00_get_field16(r17_sens, EEPROM_BBPTUNE_R17_HIGH);
652                 if (r17 != sens)
653                         rt2500usb_bbp_write(rt2x00dev, 17, sens);
654                 return;
655         }
656
657         /*
658          * Leave short or middle distance condition, restore r17
659          * to the dynamic tuning range.
660          */
661         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_VGC, &vgc_bound);
662         vgc_bound = rt2x00_get_field16(vgc_bound, EEPROM_BBPTUNE_VGCUPPER);
663
664         low_bound = 0x32;
665         if (rssi >= -77)
666                 up_bound = vgc_bound;
667         else
668                 up_bound = vgc_bound - (-77 - rssi);
669
670         if (up_bound < low_bound)
671                 up_bound = low_bound;
672
673         if (r17 > up_bound) {
674                 rt2500usb_bbp_write(rt2x00dev, 17, up_bound);
675                 rt2x00dev->link.vgc_level = up_bound;
676         } else if (rt2x00dev->link.qual.false_cca > 512 && r17 < up_bound) {
677                 rt2500usb_bbp_write(rt2x00dev, 17, ++r17);
678                 rt2x00dev->link.vgc_level = r17;
679         } else if (rt2x00dev->link.qual.false_cca < 100 && r17 > low_bound) {
680                 rt2500usb_bbp_write(rt2x00dev, 17, --r17);
681                 rt2x00dev->link.vgc_level = r17;
682         }
683 }
684
685 /*
686  * Initialization functions.
687  */
688 static int rt2500usb_init_registers(struct rt2x00_dev *rt2x00dev)
689 {
690         u16 reg;
691
692         rt2x00usb_vendor_request_sw(rt2x00dev, USB_DEVICE_MODE, 0x0001,
693                                     USB_MODE_TEST, REGISTER_TIMEOUT);
694         rt2x00usb_vendor_request_sw(rt2x00dev, USB_SINGLE_WRITE, 0x0308,
695                                     0x00f0, REGISTER_TIMEOUT);
696
697         rt2500usb_register_read(rt2x00dev, TXRX_CSR2, &reg);
698         rt2x00_set_field16(&reg, TXRX_CSR2_DISABLE_RX, 1);
699         rt2500usb_register_write(rt2x00dev, TXRX_CSR2, reg);
700
701         rt2500usb_register_write(rt2x00dev, MAC_CSR13, 0x1111);
702         rt2500usb_register_write(rt2x00dev, MAC_CSR14, 0x1e11);
703
704         rt2500usb_register_read(rt2x00dev, MAC_CSR1, &reg);
705         rt2x00_set_field16(&reg, MAC_CSR1_SOFT_RESET, 1);
706         rt2x00_set_field16(&reg, MAC_CSR1_BBP_RESET, 1);
707         rt2x00_set_field16(&reg, MAC_CSR1_HOST_READY, 0);
708         rt2500usb_register_write(rt2x00dev, MAC_CSR1, reg);
709
710         rt2500usb_register_read(rt2x00dev, MAC_CSR1, &reg);
711         rt2x00_set_field16(&reg, MAC_CSR1_SOFT_RESET, 0);
712         rt2x00_set_field16(&reg, MAC_CSR1_BBP_RESET, 0);
713         rt2x00_set_field16(&reg, MAC_CSR1_HOST_READY, 0);
714         rt2500usb_register_write(rt2x00dev, MAC_CSR1, reg);
715
716         rt2500usb_register_read(rt2x00dev, TXRX_CSR5, &reg);
717         rt2x00_set_field16(&reg, TXRX_CSR5_BBP_ID0, 13);
718         rt2x00_set_field16(&reg, TXRX_CSR5_BBP_ID0_VALID, 1);
719         rt2x00_set_field16(&reg, TXRX_CSR5_BBP_ID1, 12);
720         rt2x00_set_field16(&reg, TXRX_CSR5_BBP_ID1_VALID, 1);
721         rt2500usb_register_write(rt2x00dev, TXRX_CSR5, reg);
722
723         rt2500usb_register_read(rt2x00dev, TXRX_CSR6, &reg);
724         rt2x00_set_field16(&reg, TXRX_CSR6_BBP_ID0, 10);
725         rt2x00_set_field16(&reg, TXRX_CSR6_BBP_ID0_VALID, 1);
726         rt2x00_set_field16(&reg, TXRX_CSR6_BBP_ID1, 11);
727         rt2x00_set_field16(&reg, TXRX_CSR6_BBP_ID1_VALID, 1);
728         rt2500usb_register_write(rt2x00dev, TXRX_CSR6, reg);
729
730         rt2500usb_register_read(rt2x00dev, TXRX_CSR7, &reg);
731         rt2x00_set_field16(&reg, TXRX_CSR7_BBP_ID0, 7);
732         rt2x00_set_field16(&reg, TXRX_CSR7_BBP_ID0_VALID, 1);
733         rt2x00_set_field16(&reg, TXRX_CSR7_BBP_ID1, 6);
734         rt2x00_set_field16(&reg, TXRX_CSR7_BBP_ID1_VALID, 1);
735         rt2500usb_register_write(rt2x00dev, TXRX_CSR7, reg);
736
737         rt2500usb_register_read(rt2x00dev, TXRX_CSR8, &reg);
738         rt2x00_set_field16(&reg, TXRX_CSR8_BBP_ID0, 5);
739         rt2x00_set_field16(&reg, TXRX_CSR8_BBP_ID0_VALID, 1);
740         rt2x00_set_field16(&reg, TXRX_CSR8_BBP_ID1, 0);
741         rt2x00_set_field16(&reg, TXRX_CSR8_BBP_ID1_VALID, 0);
742         rt2500usb_register_write(rt2x00dev, TXRX_CSR8, reg);
743
744         rt2500usb_register_write(rt2x00dev, TXRX_CSR21, 0xe78f);
745         rt2500usb_register_write(rt2x00dev, MAC_CSR9, 0xff1d);
746
747         if (rt2x00dev->ops->lib->set_device_state(rt2x00dev, STATE_AWAKE))
748                 return -EBUSY;
749
750         rt2500usb_register_read(rt2x00dev, MAC_CSR1, &reg);
751         rt2x00_set_field16(&reg, MAC_CSR1_SOFT_RESET, 0);
752         rt2x00_set_field16(&reg, MAC_CSR1_BBP_RESET, 0);
753         rt2x00_set_field16(&reg, MAC_CSR1_HOST_READY, 1);
754         rt2500usb_register_write(rt2x00dev, MAC_CSR1, reg);
755
756         if (rt2x00_rev(&rt2x00dev->chip) >= RT2570_VERSION_C) {
757                 rt2500usb_register_read(rt2x00dev, PHY_CSR2, &reg);
758                 rt2x00_set_field16(&reg, PHY_CSR2_LNA, 0);
759         } else {
760                 reg = 0;
761                 rt2x00_set_field16(&reg, PHY_CSR2_LNA, 1);
762                 rt2x00_set_field16(&reg, PHY_CSR2_LNA_MODE, 3);
763         }
764         rt2500usb_register_write(rt2x00dev, PHY_CSR2, reg);
765
766         rt2500usb_register_write(rt2x00dev, MAC_CSR11, 0x0002);
767         rt2500usb_register_write(rt2x00dev, MAC_CSR22, 0x0053);
768         rt2500usb_register_write(rt2x00dev, MAC_CSR15, 0x01ee);
769         rt2500usb_register_write(rt2x00dev, MAC_CSR16, 0x0000);
770
771         rt2500usb_register_read(rt2x00dev, MAC_CSR8, &reg);
772         rt2x00_set_field16(&reg, MAC_CSR8_MAX_FRAME_UNIT,
773                            rt2x00dev->rx->data_size);
774         rt2500usb_register_write(rt2x00dev, MAC_CSR8, reg);
775
776         rt2500usb_register_read(rt2x00dev, TXRX_CSR0, &reg);
777         rt2x00_set_field16(&reg, TXRX_CSR0_IV_OFFSET, IEEE80211_HEADER);
778         rt2x00_set_field16(&reg, TXRX_CSR0_KEY_ID, 0xff);
779         rt2500usb_register_write(rt2x00dev, TXRX_CSR0, reg);
780
781         rt2500usb_register_read(rt2x00dev, MAC_CSR18, &reg);
782         rt2x00_set_field16(&reg, MAC_CSR18_DELAY_AFTER_BEACON, 90);
783         rt2500usb_register_write(rt2x00dev, MAC_CSR18, reg);
784
785         rt2500usb_register_read(rt2x00dev, PHY_CSR4, &reg);
786         rt2x00_set_field16(&reg, PHY_CSR4_LOW_RF_LE, 1);
787         rt2500usb_register_write(rt2x00dev, PHY_CSR4, reg);
788
789         rt2500usb_register_read(rt2x00dev, TXRX_CSR1, &reg);
790         rt2x00_set_field16(&reg, TXRX_CSR1_AUTO_SEQUENCE, 1);
791         rt2500usb_register_write(rt2x00dev, TXRX_CSR1, reg);
792
793         return 0;
794 }
795
796 static int rt2500usb_init_bbp(struct rt2x00_dev *rt2x00dev)
797 {
798         unsigned int i;
799         u16 eeprom;
800         u8 value;
801         u8 reg_id;
802
803         for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
804                 rt2500usb_bbp_read(rt2x00dev, 0, &value);
805                 if ((value != 0xff) && (value != 0x00))
806                         goto continue_csr_init;
807                 NOTICE(rt2x00dev, "Waiting for BBP register.\n");
808                 udelay(REGISTER_BUSY_DELAY);
809         }
810
811         ERROR(rt2x00dev, "BBP register access failed, aborting.\n");
812         return -EACCES;
813
814 continue_csr_init:
815         rt2500usb_bbp_write(rt2x00dev, 3, 0x02);
816         rt2500usb_bbp_write(rt2x00dev, 4, 0x19);
817         rt2500usb_bbp_write(rt2x00dev, 14, 0x1c);
818         rt2500usb_bbp_write(rt2x00dev, 15, 0x30);
819         rt2500usb_bbp_write(rt2x00dev, 16, 0xac);
820         rt2500usb_bbp_write(rt2x00dev, 18, 0x18);
821         rt2500usb_bbp_write(rt2x00dev, 19, 0xff);
822         rt2500usb_bbp_write(rt2x00dev, 20, 0x1e);
823         rt2500usb_bbp_write(rt2x00dev, 21, 0x08);
824         rt2500usb_bbp_write(rt2x00dev, 22, 0x08);
825         rt2500usb_bbp_write(rt2x00dev, 23, 0x08);
826         rt2500usb_bbp_write(rt2x00dev, 24, 0x80);
827         rt2500usb_bbp_write(rt2x00dev, 25, 0x50);
828         rt2500usb_bbp_write(rt2x00dev, 26, 0x08);
829         rt2500usb_bbp_write(rt2x00dev, 27, 0x23);
830         rt2500usb_bbp_write(rt2x00dev, 30, 0x10);
831         rt2500usb_bbp_write(rt2x00dev, 31, 0x2b);
832         rt2500usb_bbp_write(rt2x00dev, 32, 0xb9);
833         rt2500usb_bbp_write(rt2x00dev, 34, 0x12);
834         rt2500usb_bbp_write(rt2x00dev, 35, 0x50);
835         rt2500usb_bbp_write(rt2x00dev, 39, 0xc4);
836         rt2500usb_bbp_write(rt2x00dev, 40, 0x02);
837         rt2500usb_bbp_write(rt2x00dev, 41, 0x60);
838         rt2500usb_bbp_write(rt2x00dev, 53, 0x10);
839         rt2500usb_bbp_write(rt2x00dev, 54, 0x18);
840         rt2500usb_bbp_write(rt2x00dev, 56, 0x08);
841         rt2500usb_bbp_write(rt2x00dev, 57, 0x10);
842         rt2500usb_bbp_write(rt2x00dev, 58, 0x08);
843         rt2500usb_bbp_write(rt2x00dev, 61, 0x60);
844         rt2500usb_bbp_write(rt2x00dev, 62, 0x10);
845         rt2500usb_bbp_write(rt2x00dev, 75, 0xff);
846
847         DEBUG(rt2x00dev, "Start initialization from EEPROM...\n");
848         for (i = 0; i < EEPROM_BBP_SIZE; i++) {
849                 rt2x00_eeprom_read(rt2x00dev, EEPROM_BBP_START + i, &eeprom);
850
851                 if (eeprom != 0xffff && eeprom != 0x0000) {
852                         reg_id = rt2x00_get_field16(eeprom, EEPROM_BBP_REG_ID);
853                         value = rt2x00_get_field16(eeprom, EEPROM_BBP_VALUE);
854                         DEBUG(rt2x00dev, "BBP: 0x%02x, value: 0x%02x.\n",
855                               reg_id, value);
856                         rt2500usb_bbp_write(rt2x00dev, reg_id, value);
857                 }
858         }
859         DEBUG(rt2x00dev, "...End initialization from EEPROM.\n");
860
861         return 0;
862 }
863
864 /*
865  * Device state switch handlers.
866  */
867 static void rt2500usb_toggle_rx(struct rt2x00_dev *rt2x00dev,
868                                 enum dev_state state)
869 {
870         u16 reg;
871
872         rt2500usb_register_read(rt2x00dev, TXRX_CSR2, &reg);
873         rt2x00_set_field16(&reg, TXRX_CSR2_DISABLE_RX,
874                            state == STATE_RADIO_RX_OFF);
875         rt2500usb_register_write(rt2x00dev, TXRX_CSR2, reg);
876 }
877
878 static int rt2500usb_enable_radio(struct rt2x00_dev *rt2x00dev)
879 {
880         /*
881          * Initialize all registers.
882          */
883         if (rt2500usb_init_registers(rt2x00dev) ||
884             rt2500usb_init_bbp(rt2x00dev)) {
885                 ERROR(rt2x00dev, "Register initialization failed.\n");
886                 return -EIO;
887         }
888
889         rt2x00usb_enable_radio(rt2x00dev);
890
891         /*
892          * Enable LED
893          */
894         rt2500usb_enable_led(rt2x00dev);
895
896         return 0;
897 }
898
899 static void rt2500usb_disable_radio(struct rt2x00_dev *rt2x00dev)
900 {
901         /*
902          * Disable LED
903          */
904         rt2500usb_disable_led(rt2x00dev);
905
906         rt2500usb_register_write(rt2x00dev, MAC_CSR13, 0x2121);
907         rt2500usb_register_write(rt2x00dev, MAC_CSR14, 0x2121);
908
909         /*
910          * Disable synchronisation.
911          */
912         rt2500usb_register_write(rt2x00dev, TXRX_CSR19, 0);
913
914         rt2x00usb_disable_radio(rt2x00dev);
915 }
916
917 static int rt2500usb_set_state(struct rt2x00_dev *rt2x00dev,
918                                enum dev_state state)
919 {
920         u16 reg;
921         u16 reg2;
922         unsigned int i;
923         char put_to_sleep;
924         char bbp_state;
925         char rf_state;
926
927         put_to_sleep = (state != STATE_AWAKE);
928
929         reg = 0;
930         rt2x00_set_field16(&reg, MAC_CSR17_BBP_DESIRE_STATE, state);
931         rt2x00_set_field16(&reg, MAC_CSR17_RF_DESIRE_STATE, state);
932         rt2x00_set_field16(&reg, MAC_CSR17_PUT_TO_SLEEP, put_to_sleep);
933         rt2500usb_register_write(rt2x00dev, MAC_CSR17, reg);
934         rt2x00_set_field16(&reg, MAC_CSR17_SET_STATE, 1);
935         rt2500usb_register_write(rt2x00dev, MAC_CSR17, reg);
936
937         /*
938          * Device is not guaranteed to be in the requested state yet.
939          * We must wait until the register indicates that the
940          * device has entered the correct state.
941          */
942         for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
943                 rt2500usb_register_read(rt2x00dev, MAC_CSR17, &reg2);
944                 bbp_state = rt2x00_get_field16(reg2, MAC_CSR17_BBP_CURR_STATE);
945                 rf_state = rt2x00_get_field16(reg2, MAC_CSR17_RF_CURR_STATE);
946                 if (bbp_state == state && rf_state == state)
947                         return 0;
948                 rt2500usb_register_write(rt2x00dev, MAC_CSR17, reg);
949                 msleep(30);
950         }
951
952         NOTICE(rt2x00dev, "Device failed to enter state %d, "
953                "current device state: bbp %d and rf %d.\n",
954                state, bbp_state, rf_state);
955
956         return -EBUSY;
957 }
958
959 static int rt2500usb_set_device_state(struct rt2x00_dev *rt2x00dev,
960                                       enum dev_state state)
961 {
962         int retval = 0;
963
964         switch (state) {
965         case STATE_RADIO_ON:
966                 retval = rt2500usb_enable_radio(rt2x00dev);
967                 break;
968         case STATE_RADIO_OFF:
969                 rt2500usb_disable_radio(rt2x00dev);
970                 break;
971         case STATE_RADIO_RX_ON:
972         case STATE_RADIO_RX_OFF:
973                 rt2500usb_toggle_rx(rt2x00dev, state);
974                 break;
975         case STATE_DEEP_SLEEP:
976         case STATE_SLEEP:
977         case STATE_STANDBY:
978         case STATE_AWAKE:
979                 retval = rt2500usb_set_state(rt2x00dev, state);
980                 break;
981         default:
982                 retval = -ENOTSUPP;
983                 break;
984         }
985
986         return retval;
987 }
988
989 /*
990  * TX descriptor initialization
991  */
992 static void rt2500usb_write_tx_desc(struct rt2x00_dev *rt2x00dev,
993                                     struct data_desc *txd,
994                                     struct txdata_entry_desc *desc,
995                                     struct ieee80211_hdr *ieee80211hdr,
996                                     unsigned int length,
997                                     struct ieee80211_tx_control *control)
998 {
999         u32 word;
1000
1001         /*
1002          * Start writing the descriptor words.
1003          */
1004         rt2x00_desc_read(txd, 1, &word);
1005         rt2x00_set_field32(&word, TXD_W1_IV_OFFSET, IEEE80211_HEADER);
1006         rt2x00_set_field32(&word, TXD_W1_AIFS, desc->aifs);
1007         rt2x00_set_field32(&word, TXD_W1_CWMIN, desc->cw_min);
1008         rt2x00_set_field32(&word, TXD_W1_CWMAX, desc->cw_max);
1009         rt2x00_desc_write(txd, 1, word);
1010
1011         rt2x00_desc_read(txd, 2, &word);
1012         rt2x00_set_field32(&word, TXD_W2_PLCP_SIGNAL, desc->signal);
1013         rt2x00_set_field32(&word, TXD_W2_PLCP_SERVICE, desc->service);
1014         rt2x00_set_field32(&word, TXD_W2_PLCP_LENGTH_LOW, desc->length_low);
1015         rt2x00_set_field32(&word, TXD_W2_PLCP_LENGTH_HIGH, desc->length_high);
1016         rt2x00_desc_write(txd, 2, word);
1017
1018         rt2x00_desc_read(txd, 0, &word);
1019         rt2x00_set_field32(&word, TXD_W0_RETRY_LIMIT, control->retry_limit);
1020         rt2x00_set_field32(&word, TXD_W0_MORE_FRAG,
1021                            test_bit(ENTRY_TXD_MORE_FRAG, &desc->flags));
1022         rt2x00_set_field32(&word, TXD_W0_ACK,
1023                            !(control->flags & IEEE80211_TXCTL_NO_ACK));
1024         rt2x00_set_field32(&word, TXD_W0_TIMESTAMP,
1025                            test_bit(ENTRY_TXD_REQ_TIMESTAMP, &desc->flags));
1026         rt2x00_set_field32(&word, TXD_W0_OFDM,
1027                            test_bit(ENTRY_TXD_OFDM_RATE, &desc->flags));
1028         rt2x00_set_field32(&word, TXD_W0_NEW_SEQ,
1029                            !!(control->flags & IEEE80211_TXCTL_FIRST_FRAGMENT));
1030         rt2x00_set_field32(&word, TXD_W0_IFS, desc->ifs);
1031         rt2x00_set_field32(&word, TXD_W0_DATABYTE_COUNT, length);
1032         rt2x00_set_field32(&word, TXD_W0_CIPHER, CIPHER_NONE);
1033         rt2x00_desc_write(txd, 0, word);
1034 }
1035
1036 static int rt2500usb_get_tx_data_len(struct rt2x00_dev *rt2x00dev,
1037                                      struct sk_buff *skb)
1038 {
1039         int length;
1040
1041         /*
1042          * The length _must_ be a multiple of 2,
1043          * but it must _not_ be a multiple of the USB packet size.
1044          */
1045         length = roundup(skb->len, 2);
1046         length += (2 * !(length % rt2x00dev->usb_maxpacket));
1047
1048         return length;
1049 }
1050
1051 /*
1052  * TX data initialization
1053  */
1054 static void rt2500usb_kick_tx_queue(struct rt2x00_dev *rt2x00dev,
1055                                     unsigned int queue)
1056 {
1057         u16 reg;
1058
1059         if (queue != IEEE80211_TX_QUEUE_BEACON)
1060                 return;
1061
1062         rt2500usb_register_read(rt2x00dev, TXRX_CSR19, &reg);
1063         if (!rt2x00_get_field16(reg, TXRX_CSR19_BEACON_GEN)) {
1064                 rt2x00_set_field16(&reg, TXRX_CSR19_BEACON_GEN, 1);
1065                 /*
1066                  * Beacon generation will fail initially.
1067                  * To prevent this we need to register the TXRX_CSR19
1068                  * register several times.
1069                  */
1070                 rt2500usb_register_write(rt2x00dev, TXRX_CSR19, reg);
1071                 rt2500usb_register_write(rt2x00dev, TXRX_CSR19, 0);
1072                 rt2500usb_register_write(rt2x00dev, TXRX_CSR19, reg);
1073                 rt2500usb_register_write(rt2x00dev, TXRX_CSR19, 0);
1074                 rt2500usb_register_write(rt2x00dev, TXRX_CSR19, reg);
1075         }
1076 }
1077
1078 /*
1079  * RX control handlers
1080  */
1081 static void rt2500usb_fill_rxdone(struct data_entry *entry,
1082                                   struct rxdata_entry_desc *desc)
1083 {
1084         struct urb *urb = entry->priv;
1085         struct data_desc *rxd = (struct data_desc *)(entry->skb->data +
1086                                                      (urb->actual_length -
1087                                                       entry->ring->desc_size));
1088         u32 word0;
1089         u32 word1;
1090
1091         rt2x00_desc_read(rxd, 0, &word0);
1092         rt2x00_desc_read(rxd, 1, &word1);
1093
1094         desc->flags = 0;
1095         if (rt2x00_get_field32(word0, RXD_W0_CRC_ERROR))
1096                 desc->flags |= RX_FLAG_FAILED_FCS_CRC;
1097         if (rt2x00_get_field32(word0, RXD_W0_PHYSICAL_ERROR))
1098                 desc->flags |= RX_FLAG_FAILED_PLCP_CRC;
1099
1100         /*
1101          * Obtain the status about this packet.
1102          */
1103         desc->signal = rt2x00_get_field32(word1, RXD_W1_SIGNAL);
1104         desc->rssi = rt2x00_get_field32(word1, RXD_W1_RSSI) -
1105             entry->ring->rt2x00dev->rssi_offset;
1106         desc->ofdm = rt2x00_get_field32(word0, RXD_W0_OFDM);
1107         desc->size = rt2x00_get_field32(word0, RXD_W0_DATABYTE_COUNT);
1108
1109         return;
1110 }
1111
1112 /*
1113  * Interrupt functions.
1114  */
1115 static void rt2500usb_beacondone(struct urb *urb)
1116 {
1117         struct data_entry *entry = (struct data_entry *)urb->context;
1118         struct data_ring *ring = entry->ring;
1119
1120         if (!test_bit(DEVICE_ENABLED_RADIO, &ring->rt2x00dev->flags))
1121                 return;
1122
1123         /*
1124          * Check if this was the guardian beacon,
1125          * if that was the case we need to send the real beacon now.
1126          * Otherwise we should free the sk_buffer, the device
1127          * should be doing the rest of the work now.
1128          */
1129         if (ring->index == 1) {
1130                 rt2x00_ring_index_done_inc(ring);
1131                 entry = rt2x00_get_data_entry(ring);
1132                 usb_submit_urb(entry->priv, GFP_ATOMIC);
1133                 rt2x00_ring_index_inc(ring);
1134         } else if (ring->index_done == 1) {
1135                 entry = rt2x00_get_data_entry_done(ring);
1136                 if (entry->skb) {
1137                         dev_kfree_skb(entry->skb);
1138                         entry->skb = NULL;
1139                 }
1140                 rt2x00_ring_index_done_inc(ring);
1141         }
1142 }
1143
1144 /*
1145  * Device probe functions.
1146  */
1147 static int rt2500usb_validate_eeprom(struct rt2x00_dev *rt2x00dev)
1148 {
1149         u16 word;
1150         u8 *mac;
1151
1152         rt2x00usb_eeprom_read(rt2x00dev, rt2x00dev->eeprom, EEPROM_SIZE);
1153
1154         /*
1155          * Start validation of the data that has been read.
1156          */
1157         mac = rt2x00_eeprom_addr(rt2x00dev, EEPROM_MAC_ADDR_0);
1158         if (!is_valid_ether_addr(mac)) {
1159                 DECLARE_MAC_BUF(macbuf);
1160
1161                 random_ether_addr(mac);
1162                 EEPROM(rt2x00dev, "MAC: %s\n", print_mac(macbuf, mac));
1163         }
1164
1165         rt2x00_eeprom_read(rt2x00dev, EEPROM_ANTENNA, &word);
1166         if (word == 0xffff) {
1167                 rt2x00_set_field16(&word, EEPROM_ANTENNA_NUM, 2);
1168                 rt2x00_set_field16(&word, EEPROM_ANTENNA_TX_DEFAULT,
1169                                    ANTENNA_SW_DIVERSITY);
1170                 rt2x00_set_field16(&word, EEPROM_ANTENNA_RX_DEFAULT,
1171                                    ANTENNA_SW_DIVERSITY);
1172                 rt2x00_set_field16(&word, EEPROM_ANTENNA_LED_MODE,
1173                                    LED_MODE_DEFAULT);
1174                 rt2x00_set_field16(&word, EEPROM_ANTENNA_DYN_TXAGC, 0);
1175                 rt2x00_set_field16(&word, EEPROM_ANTENNA_HARDWARE_RADIO, 0);
1176                 rt2x00_set_field16(&word, EEPROM_ANTENNA_RF_TYPE, RF2522);
1177                 rt2x00_eeprom_write(rt2x00dev, EEPROM_ANTENNA, word);
1178                 EEPROM(rt2x00dev, "Antenna: 0x%04x\n", word);
1179         }
1180
1181         rt2x00_eeprom_read(rt2x00dev, EEPROM_NIC, &word);
1182         if (word == 0xffff) {
1183                 rt2x00_set_field16(&word, EEPROM_NIC_CARDBUS_ACCEL, 0);
1184                 rt2x00_set_field16(&word, EEPROM_NIC_DYN_BBP_TUNE, 0);
1185                 rt2x00_set_field16(&word, EEPROM_NIC_CCK_TX_POWER, 0);
1186                 rt2x00_eeprom_write(rt2x00dev, EEPROM_NIC, word);
1187                 EEPROM(rt2x00dev, "NIC: 0x%04x\n", word);
1188         }
1189
1190         rt2x00_eeprom_read(rt2x00dev, EEPROM_CALIBRATE_OFFSET, &word);
1191         if (word == 0xffff) {
1192                 rt2x00_set_field16(&word, EEPROM_CALIBRATE_OFFSET_RSSI,
1193                                    DEFAULT_RSSI_OFFSET);
1194                 rt2x00_eeprom_write(rt2x00dev, EEPROM_CALIBRATE_OFFSET, word);
1195                 EEPROM(rt2x00dev, "Calibrate offset: 0x%04x\n", word);
1196         }
1197
1198         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE, &word);
1199         if (word == 0xffff) {
1200                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_THRESHOLD, 45);
1201                 rt2x00_eeprom_write(rt2x00dev, EEPROM_BBPTUNE, word);
1202                 EEPROM(rt2x00dev, "BBPtune: 0x%04x\n", word);
1203         }
1204
1205         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_VGC, &word);
1206         if (word == 0xffff) {
1207                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_VGCUPPER, 0x40);
1208                 rt2x00_eeprom_write(rt2x00dev, EEPROM_BBPTUNE_VGC, word);
1209                 EEPROM(rt2x00dev, "BBPtune vgc: 0x%04x\n", word);
1210         }
1211
1212         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R17, &word);
1213         if (word == 0xffff) {
1214                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_R17_LOW, 0x48);
1215                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_R17_HIGH, 0x41);
1216                 rt2x00_eeprom_write(rt2x00dev, EEPROM_BBPTUNE_R17, word);
1217                 EEPROM(rt2x00dev, "BBPtune r17: 0x%04x\n", word);
1218         }
1219
1220         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R24, &word);
1221         if (word == 0xffff) {
1222                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_R24_LOW, 0x40);
1223                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_R24_HIGH, 0x80);
1224                 rt2x00_eeprom_write(rt2x00dev, EEPROM_BBPTUNE_R24, word);
1225                 EEPROM(rt2x00dev, "BBPtune r24: 0x%04x\n", word);
1226         }
1227
1228         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R25, &word);
1229         if (word == 0xffff) {
1230                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_R25_LOW, 0x40);
1231                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_R25_HIGH, 0x50);
1232                 rt2x00_eeprom_write(rt2x00dev, EEPROM_BBPTUNE_R25, word);
1233                 EEPROM(rt2x00dev, "BBPtune r25: 0x%04x\n", word);
1234         }
1235
1236         rt2x00_eeprom_read(rt2x00dev, EEPROM_BBPTUNE_R61, &word);
1237         if (word == 0xffff) {
1238                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_R61_LOW, 0x60);
1239                 rt2x00_set_field16(&word, EEPROM_BBPTUNE_R61_HIGH, 0x6d);
1240                 rt2x00_eeprom_write(rt2x00dev, EEPROM_BBPTUNE_R61, word);
1241                 EEPROM(rt2x00dev, "BBPtune r61: 0x%04x\n", word);
1242         }
1243
1244         return 0;
1245 }
1246
1247 static int rt2500usb_init_eeprom(struct rt2x00_dev *rt2x00dev)
1248 {
1249         u16 reg;
1250         u16 value;
1251         u16 eeprom;
1252
1253         /*
1254          * Read EEPROM word for configuration.
1255          */
1256         rt2x00_eeprom_read(rt2x00dev, EEPROM_ANTENNA, &eeprom);
1257
1258         /*
1259          * Identify RF chipset.
1260          */
1261         value = rt2x00_get_field16(eeprom, EEPROM_ANTENNA_RF_TYPE);
1262         rt2500usb_register_read(rt2x00dev, MAC_CSR0, &reg);
1263         rt2x00_set_chip(rt2x00dev, RT2570, value, reg);
1264
1265         if (!rt2x00_check_rev(&rt2x00dev->chip, 0)) {
1266                 ERROR(rt2x00dev, "Invalid RT chipset detected.\n");
1267                 return -ENODEV;
1268         }
1269
1270         if (!rt2x00_rf(&rt2x00dev->chip, RF2522) &&
1271             !rt2x00_rf(&rt2x00dev->chip, RF2523) &&
1272             !rt2x00_rf(&rt2x00dev->chip, RF2524) &&
1273             !rt2x00_rf(&rt2x00dev->chip, RF2525) &&
1274             !rt2x00_rf(&rt2x00dev->chip, RF2525E) &&
1275             !rt2x00_rf(&rt2x00dev->chip, RF5222)) {
1276                 ERROR(rt2x00dev, "Invalid RF chipset detected.\n");
1277                 return -ENODEV;
1278         }
1279
1280         /*
1281          * Identify default antenna configuration.
1282          */
1283         rt2x00dev->default_ant.tx =
1284             rt2x00_get_field16(eeprom, EEPROM_ANTENNA_TX_DEFAULT);
1285         rt2x00dev->default_ant.rx =
1286             rt2x00_get_field16(eeprom, EEPROM_ANTENNA_RX_DEFAULT);
1287
1288         /*
1289          * When the eeprom indicates SW_DIVERSITY use HW_DIVERSITY instead.
1290          * I am not 100% sure about this, but the legacy drivers do not
1291          * indicate antenna swapping in software is required when
1292          * diversity is enabled.
1293          */
1294         if (rt2x00dev->default_ant.tx == ANTENNA_SW_DIVERSITY)
1295                 rt2x00dev->default_ant.tx = ANTENNA_HW_DIVERSITY;
1296         if (rt2x00dev->default_ant.rx == ANTENNA_SW_DIVERSITY)
1297                 rt2x00dev->default_ant.rx = ANTENNA_HW_DIVERSITY;
1298
1299         /*
1300          * Store led mode, for correct led behaviour.
1301          */
1302         rt2x00dev->led_mode =
1303             rt2x00_get_field16(eeprom, EEPROM_ANTENNA_LED_MODE);
1304
1305         /*
1306          * Check if the BBP tuning should be disabled.
1307          */
1308         rt2x00_eeprom_read(rt2x00dev, EEPROM_NIC, &eeprom);
1309         if (rt2x00_get_field16(eeprom, EEPROM_NIC_DYN_BBP_TUNE))
1310                 __set_bit(CONFIG_DISABLE_LINK_TUNING, &rt2x00dev->flags);
1311
1312         /*
1313          * Read the RSSI <-> dBm offset information.
1314          */
1315         rt2x00_eeprom_read(rt2x00dev, EEPROM_CALIBRATE_OFFSET, &eeprom);
1316         rt2x00dev->rssi_offset =
1317             rt2x00_get_field16(eeprom, EEPROM_CALIBRATE_OFFSET_RSSI);
1318
1319         return 0;
1320 }
1321
1322 /*
1323  * RF value list for RF2522
1324  * Supports: 2.4 GHz
1325  */
1326 static const struct rf_channel rf_vals_bg_2522[] = {
1327         { 1,  0x00002050, 0x000c1fda, 0x00000101, 0 },
1328         { 2,  0x00002050, 0x000c1fee, 0x00000101, 0 },
1329         { 3,  0x00002050, 0x000c2002, 0x00000101, 0 },
1330         { 4,  0x00002050, 0x000c2016, 0x00000101, 0 },
1331         { 5,  0x00002050, 0x000c202a, 0x00000101, 0 },
1332         { 6,  0x00002050, 0x000c203e, 0x00000101, 0 },
1333         { 7,  0x00002050, 0x000c2052, 0x00000101, 0 },
1334         { 8,  0x00002050, 0x000c2066, 0x00000101, 0 },
1335         { 9,  0x00002050, 0x000c207a, 0x00000101, 0 },
1336         { 10, 0x00002050, 0x000c208e, 0x00000101, 0 },
1337         { 11, 0x00002050, 0x000c20a2, 0x00000101, 0 },
1338         { 12, 0x00002050, 0x000c20b6, 0x00000101, 0 },
1339         { 13, 0x00002050, 0x000c20ca, 0x00000101, 0 },
1340         { 14, 0x00002050, 0x000c20fa, 0x00000101, 0 },
1341 };
1342
1343 /*
1344  * RF value list for RF2523
1345  * Supports: 2.4 GHz
1346  */
1347 static const struct rf_channel rf_vals_bg_2523[] = {
1348         { 1,  0x00022010, 0x00000c9e, 0x000e0111, 0x00000a1b },
1349         { 2,  0x00022010, 0x00000ca2, 0x000e0111, 0x00000a1b },
1350         { 3,  0x00022010, 0x00000ca6, 0x000e0111, 0x00000a1b },
1351         { 4,  0x00022010, 0x00000caa, 0x000e0111, 0x00000a1b },
1352         { 5,  0x00022010, 0x00000cae, 0x000e0111, 0x00000a1b },
1353         { 6,  0x00022010, 0x00000cb2, 0x000e0111, 0x00000a1b },
1354         { 7,  0x00022010, 0x00000cb6, 0x000e0111, 0x00000a1b },
1355         { 8,  0x00022010, 0x00000cba, 0x000e0111, 0x00000a1b },
1356         { 9,  0x00022010, 0x00000cbe, 0x000e0111, 0x00000a1b },
1357         { 10, 0x00022010, 0x00000d02, 0x000e0111, 0x00000a1b },
1358         { 11, 0x00022010, 0x00000d06, 0x000e0111, 0x00000a1b },
1359         { 12, 0x00022010, 0x00000d0a, 0x000e0111, 0x00000a1b },
1360         { 13, 0x00022010, 0x00000d0e, 0x000e0111, 0x00000a1b },
1361         { 14, 0x00022010, 0x00000d1a, 0x000e0111, 0x00000a03 },
1362 };
1363
1364 /*
1365  * RF value list for RF2524
1366  * Supports: 2.4 GHz
1367  */
1368 static const struct rf_channel rf_vals_bg_2524[] = {
1369         { 1,  0x00032020, 0x00000c9e, 0x00000101, 0x00000a1b },
1370         { 2,  0x00032020, 0x00000ca2, 0x00000101, 0x00000a1b },
1371         { 3,  0x00032020, 0x00000ca6, 0x00000101, 0x00000a1b },
1372         { 4,  0x00032020, 0x00000caa, 0x00000101, 0x00000a1b },
1373         { 5,  0x00032020, 0x00000cae, 0x00000101, 0x00000a1b },
1374         { 6,  0x00032020, 0x00000cb2, 0x00000101, 0x00000a1b },
1375         { 7,  0x00032020, 0x00000cb6, 0x00000101, 0x00000a1b },
1376         { 8,  0x00032020, 0x00000cba, 0x00000101, 0x00000a1b },
1377         { 9,  0x00032020, 0x00000cbe, 0x00000101, 0x00000a1b },
1378         { 10, 0x00032020, 0x00000d02, 0x00000101, 0x00000a1b },
1379         { 11, 0x00032020, 0x00000d06, 0x00000101, 0x00000a1b },
1380         { 12, 0x00032020, 0x00000d0a, 0x00000101, 0x00000a1b },
1381         { 13, 0x00032020, 0x00000d0e, 0x00000101, 0x00000a1b },
1382         { 14, 0x00032020, 0x00000d1a, 0x00000101, 0x00000a03 },
1383 };
1384
1385 /*
1386  * RF value list for RF2525
1387  * Supports: 2.4 GHz
1388  */
1389 static const struct rf_channel rf_vals_bg_2525[] = {
1390         { 1,  0x00022020, 0x00080c9e, 0x00060111, 0x00000a1b },
1391         { 2,  0x00022020, 0x00080ca2, 0x00060111, 0x00000a1b },
1392         { 3,  0x00022020, 0x00080ca6, 0x00060111, 0x00000a1b },
1393         { 4,  0x00022020, 0x00080caa, 0x00060111, 0x00000a1b },
1394         { 5,  0x00022020, 0x00080cae, 0x00060111, 0x00000a1b },
1395         { 6,  0x00022020, 0x00080cb2, 0x00060111, 0x00000a1b },
1396         { 7,  0x00022020, 0x00080cb6, 0x00060111, 0x00000a1b },
1397         { 8,  0x00022020, 0x00080cba, 0x00060111, 0x00000a1b },
1398         { 9,  0x00022020, 0x00080cbe, 0x00060111, 0x00000a1b },
1399         { 10, 0x00022020, 0x00080d02, 0x00060111, 0x00000a1b },
1400         { 11, 0x00022020, 0x00080d06, 0x00060111, 0x00000a1b },
1401         { 12, 0x00022020, 0x00080d0a, 0x00060111, 0x00000a1b },
1402         { 13, 0x00022020, 0x00080d0e, 0x00060111, 0x00000a1b },
1403         { 14, 0x00022020, 0x00080d1a, 0x00060111, 0x00000a03 },
1404 };
1405
1406 /*
1407  * RF value list for RF2525e
1408  * Supports: 2.4 GHz
1409  */
1410 static const struct rf_channel rf_vals_bg_2525e[] = {
1411         { 1,  0x00022010, 0x0000089a, 0x00060111, 0x00000e1b },
1412         { 2,  0x00022010, 0x0000089e, 0x00060111, 0x00000e07 },
1413         { 3,  0x00022010, 0x0000089e, 0x00060111, 0x00000e1b },
1414         { 4,  0x00022010, 0x000008a2, 0x00060111, 0x00000e07 },
1415         { 5,  0x00022010, 0x000008a2, 0x00060111, 0x00000e1b },
1416         { 6,  0x00022010, 0x000008a6, 0x00060111, 0x00000e07 },
1417         { 7,  0x00022010, 0x000008a6, 0x00060111, 0x00000e1b },
1418         { 8,  0x00022010, 0x000008aa, 0x00060111, 0x00000e07 },
1419         { 9,  0x00022010, 0x000008aa, 0x00060111, 0x00000e1b },
1420         { 10, 0x00022010, 0x000008ae, 0x00060111, 0x00000e07 },
1421         { 11, 0x00022010, 0x000008ae, 0x00060111, 0x00000e1b },
1422         { 12, 0x00022010, 0x000008b2, 0x00060111, 0x00000e07 },
1423         { 13, 0x00022010, 0x000008b2, 0x00060111, 0x00000e1b },
1424         { 14, 0x00022010, 0x000008b6, 0x00060111, 0x00000e23 },
1425 };
1426
1427 /*
1428  * RF value list for RF5222
1429  * Supports: 2.4 GHz & 5.2 GHz
1430  */
1431 static const struct rf_channel rf_vals_5222[] = {
1432         { 1,  0x00022020, 0x00001136, 0x00000101, 0x00000a0b },
1433         { 2,  0x00022020, 0x0000113a, 0x00000101, 0x00000a0b },
1434         { 3,  0x00022020, 0x0000113e, 0x00000101, 0x00000a0b },
1435         { 4,  0x00022020, 0x00001182, 0x00000101, 0x00000a0b },
1436         { 5,  0x00022020, 0x00001186, 0x00000101, 0x00000a0b },
1437         { 6,  0x00022020, 0x0000118a, 0x00000101, 0x00000a0b },
1438         { 7,  0x00022020, 0x0000118e, 0x00000101, 0x00000a0b },
1439         { 8,  0x00022020, 0x00001192, 0x00000101, 0x00000a0b },
1440         { 9,  0x00022020, 0x00001196, 0x00000101, 0x00000a0b },
1441         { 10, 0x00022020, 0x0000119a, 0x00000101, 0x00000a0b },
1442         { 11, 0x00022020, 0x0000119e, 0x00000101, 0x00000a0b },
1443         { 12, 0x00022020, 0x000011a2, 0x00000101, 0x00000a0b },
1444         { 13, 0x00022020, 0x000011a6, 0x00000101, 0x00000a0b },
1445         { 14, 0x00022020, 0x000011ae, 0x00000101, 0x00000a1b },
1446
1447         /* 802.11 UNI / HyperLan 2 */
1448         { 36, 0x00022010, 0x00018896, 0x00000101, 0x00000a1f },
1449         { 40, 0x00022010, 0x0001889a, 0x00000101, 0x00000a1f },
1450         { 44, 0x00022010, 0x0001889e, 0x00000101, 0x00000a1f },
1451         { 48, 0x00022010, 0x000188a2, 0x00000101, 0x00000a1f },
1452         { 52, 0x00022010, 0x000188a6, 0x00000101, 0x00000a1f },
1453         { 66, 0x00022010, 0x000188aa, 0x00000101, 0x00000a1f },
1454         { 60, 0x00022010, 0x000188ae, 0x00000101, 0x00000a1f },
1455         { 64, 0x00022010, 0x000188b2, 0x00000101, 0x00000a1f },
1456
1457         /* 802.11 HyperLan 2 */
1458         { 100, 0x00022010, 0x00008802, 0x00000101, 0x00000a0f },
1459         { 104, 0x00022010, 0x00008806, 0x00000101, 0x00000a0f },
1460         { 108, 0x00022010, 0x0000880a, 0x00000101, 0x00000a0f },
1461         { 112, 0x00022010, 0x0000880e, 0x00000101, 0x00000a0f },
1462         { 116, 0x00022010, 0x00008812, 0x00000101, 0x00000a0f },
1463         { 120, 0x00022010, 0x00008816, 0x00000101, 0x00000a0f },
1464         { 124, 0x00022010, 0x0000881a, 0x00000101, 0x00000a0f },
1465         { 128, 0x00022010, 0x0000881e, 0x00000101, 0x00000a0f },
1466         { 132, 0x00022010, 0x00008822, 0x00000101, 0x00000a0f },
1467         { 136, 0x00022010, 0x00008826, 0x00000101, 0x00000a0f },
1468
1469         /* 802.11 UNII */
1470         { 140, 0x00022010, 0x0000882a, 0x00000101, 0x00000a0f },
1471         { 149, 0x00022020, 0x000090a6, 0x00000101, 0x00000a07 },
1472         { 153, 0x00022020, 0x000090ae, 0x00000101, 0x00000a07 },
1473         { 157, 0x00022020, 0x000090b6, 0x00000101, 0x00000a07 },
1474         { 161, 0x00022020, 0x000090be, 0x00000101, 0x00000a07 },
1475 };
1476
1477 static void rt2500usb_probe_hw_mode(struct rt2x00_dev *rt2x00dev)
1478 {
1479         struct hw_mode_spec *spec = &rt2x00dev->spec;
1480         u8 *txpower;
1481         unsigned int i;
1482
1483         /*
1484          * Initialize all hw fields.
1485          */
1486         rt2x00dev->hw->flags =
1487             IEEE80211_HW_HOST_GEN_BEACON_TEMPLATE |
1488             IEEE80211_HW_RX_INCLUDES_FCS |
1489             IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING;
1490         rt2x00dev->hw->extra_tx_headroom = TXD_DESC_SIZE;
1491         rt2x00dev->hw->max_signal = MAX_SIGNAL;
1492         rt2x00dev->hw->max_rssi = MAX_RX_SSI;
1493         rt2x00dev->hw->queues = 2;
1494
1495         SET_IEEE80211_DEV(rt2x00dev->hw, &rt2x00dev_usb(rt2x00dev)->dev);
1496         SET_IEEE80211_PERM_ADDR(rt2x00dev->hw,
1497                                 rt2x00_eeprom_addr(rt2x00dev,
1498                                                    EEPROM_MAC_ADDR_0));
1499
1500         /*
1501          * Convert tx_power array in eeprom.
1502          */
1503         txpower = rt2x00_eeprom_addr(rt2x00dev, EEPROM_TXPOWER_START);
1504         for (i = 0; i < 14; i++)
1505                 txpower[i] = TXPOWER_FROM_DEV(txpower[i]);
1506
1507         /*
1508          * Initialize hw_mode information.
1509          */
1510         spec->num_modes = 2;
1511         spec->num_rates = 12;
1512         spec->tx_power_a = NULL;
1513         spec->tx_power_bg = txpower;
1514         spec->tx_power_default = DEFAULT_TXPOWER;
1515
1516         if (rt2x00_rf(&rt2x00dev->chip, RF2522)) {
1517                 spec->num_channels = ARRAY_SIZE(rf_vals_bg_2522);
1518                 spec->channels = rf_vals_bg_2522;
1519         } else if (rt2x00_rf(&rt2x00dev->chip, RF2523)) {
1520                 spec->num_channels = ARRAY_SIZE(rf_vals_bg_2523);
1521                 spec->channels = rf_vals_bg_2523;
1522         } else if (rt2x00_rf(&rt2x00dev->chip, RF2524)) {
1523                 spec->num_channels = ARRAY_SIZE(rf_vals_bg_2524);
1524                 spec->channels = rf_vals_bg_2524;
1525         } else if (rt2x00_rf(&rt2x00dev->chip, RF2525)) {
1526                 spec->num_channels = ARRAY_SIZE(rf_vals_bg_2525);
1527                 spec->channels = rf_vals_bg_2525;
1528         } else if (rt2x00_rf(&rt2x00dev->chip, RF2525E)) {
1529                 spec->num_channels = ARRAY_SIZE(rf_vals_bg_2525e);
1530                 spec->channels = rf_vals_bg_2525e;
1531         } else if (rt2x00_rf(&rt2x00dev->chip, RF5222)) {
1532                 spec->num_channels = ARRAY_SIZE(rf_vals_5222);
1533                 spec->channels = rf_vals_5222;
1534                 spec->num_modes = 3;
1535         }
1536 }
1537
1538 static int rt2500usb_probe_hw(struct rt2x00_dev *rt2x00dev)
1539 {
1540         int retval;
1541
1542         /*
1543          * Allocate eeprom data.
1544          */
1545         retval = rt2500usb_validate_eeprom(rt2x00dev);
1546         if (retval)
1547                 return retval;
1548
1549         retval = rt2500usb_init_eeprom(rt2x00dev);
1550         if (retval)
1551                 return retval;
1552
1553         /*
1554          * Initialize hw specifications.
1555          */
1556         rt2500usb_probe_hw_mode(rt2x00dev);
1557
1558         /*
1559          * This device requires the beacon ring
1560          */
1561         __set_bit(DRIVER_REQUIRE_BEACON_RING, &rt2x00dev->flags);
1562
1563         /*
1564          * Set the rssi offset.
1565          */
1566         rt2x00dev->rssi_offset = DEFAULT_RSSI_OFFSET;
1567
1568         return 0;
1569 }
1570
1571 /*
1572  * IEEE80211 stack callback functions.
1573  */
1574 static void rt2500usb_configure_filter(struct ieee80211_hw *hw,
1575                                        unsigned int changed_flags,
1576                                        unsigned int *total_flags,
1577                                        int mc_count,
1578                                        struct dev_addr_list *mc_list)
1579 {
1580         struct rt2x00_dev *rt2x00dev = hw->priv;
1581         struct interface *intf = &rt2x00dev->interface;
1582         u16 reg;
1583
1584         /*
1585          * Mask off any flags we are going to ignore from
1586          * the total_flags field.
1587          */
1588         *total_flags &=
1589             FIF_ALLMULTI |
1590             FIF_FCSFAIL |
1591             FIF_PLCPFAIL |
1592             FIF_CONTROL |
1593             FIF_OTHER_BSS |
1594             FIF_PROMISC_IN_BSS;
1595
1596         /*
1597          * Apply some rules to the filters:
1598          * - Some filters imply different filters to be set.
1599          * - Some things we can't filter out at all.
1600          * - Some filters are set based on interface type.
1601          */
1602         if (mc_count)
1603                 *total_flags |= FIF_ALLMULTI;
1604         if (*total_flags & FIF_OTHER_BSS ||
1605             *total_flags & FIF_PROMISC_IN_BSS)
1606                 *total_flags |= FIF_PROMISC_IN_BSS | FIF_OTHER_BSS;
1607         if (is_interface_type(intf, IEEE80211_IF_TYPE_AP))
1608                 *total_flags |= FIF_PROMISC_IN_BSS;
1609
1610         /*
1611          * Check if there is any work left for us.
1612          */
1613         if (intf->filter == *total_flags)
1614                 return;
1615         intf->filter = *total_flags;
1616
1617         /*
1618          * When in atomic context, reschedule and let rt2x00lib
1619          * call this function again.
1620          */
1621         if (in_atomic()) {
1622                 queue_work(rt2x00dev->hw->workqueue, &rt2x00dev->filter_work);
1623                 return;
1624         }
1625
1626         /*
1627          * Start configuration steps.
1628          * Note that the version error will always be dropped
1629          * and broadcast frames will always be accepted since
1630          * there is no filter for it at this time.
1631          */
1632         rt2500usb_register_read(rt2x00dev, TXRX_CSR2, &reg);
1633         rt2x00_set_field16(&reg, TXRX_CSR2_DROP_CRC,
1634                            !(*total_flags & FIF_FCSFAIL));
1635         rt2x00_set_field16(&reg, TXRX_CSR2_DROP_PHYSICAL,
1636                            !(*total_flags & FIF_PLCPFAIL));
1637         rt2x00_set_field16(&reg, TXRX_CSR2_DROP_CONTROL,
1638                            !(*total_flags & FIF_CONTROL));
1639         rt2x00_set_field16(&reg, TXRX_CSR2_DROP_NOT_TO_ME,
1640                            !(*total_flags & FIF_PROMISC_IN_BSS));
1641         rt2x00_set_field16(&reg, TXRX_CSR2_DROP_TODS,
1642                            !(*total_flags & FIF_PROMISC_IN_BSS));
1643         rt2x00_set_field16(&reg, TXRX_CSR2_DROP_VERSION_ERROR, 1);
1644         rt2x00_set_field16(&reg, TXRX_CSR2_DROP_MULTICAST,
1645                            !(*total_flags & FIF_ALLMULTI));
1646         rt2x00_set_field16(&reg, TXRX_CSR2_DROP_BROADCAST, 0);
1647         rt2500usb_register_write(rt2x00dev, TXRX_CSR2, reg);
1648 }
1649
1650 static int rt2500usb_beacon_update(struct ieee80211_hw *hw,
1651                                    struct sk_buff *skb,
1652                                    struct ieee80211_tx_control *control)
1653 {
1654         struct rt2x00_dev *rt2x00dev = hw->priv;
1655         struct usb_device *usb_dev =
1656             interface_to_usbdev(rt2x00dev_usb(rt2x00dev));
1657         struct data_ring *ring =
1658             rt2x00lib_get_ring(rt2x00dev, IEEE80211_TX_QUEUE_BEACON);
1659         struct data_entry *beacon;
1660         struct data_entry *guardian;
1661         int pipe = usb_sndbulkpipe(usb_dev, 1);
1662         int length;
1663
1664         /*
1665          * Just in case the ieee80211 doesn't set this,
1666          * but we need this queue set for the descriptor
1667          * initialization.
1668          */
1669         control->queue = IEEE80211_TX_QUEUE_BEACON;
1670
1671         /*
1672          * Obtain 2 entries, one for the guardian byte,
1673          * the second for the actual beacon.
1674          */
1675         guardian = rt2x00_get_data_entry(ring);
1676         rt2x00_ring_index_inc(ring);
1677         beacon = rt2x00_get_data_entry(ring);
1678
1679         /*
1680          * First we create the beacon.
1681          */
1682         skb_push(skb, ring->desc_size);
1683         memset(skb->data, 0, ring->desc_size);
1684
1685         rt2x00lib_write_tx_desc(rt2x00dev, (struct data_desc *)skb->data,
1686                                 (struct ieee80211_hdr *)(skb->data +
1687                                                          ring->desc_size),
1688                                 skb->len - ring->desc_size, control);
1689
1690         length = rt2500usb_get_tx_data_len(rt2x00dev, skb);
1691
1692         usb_fill_bulk_urb(beacon->priv, usb_dev, pipe,
1693                           skb->data, length, rt2500usb_beacondone, beacon);
1694
1695         beacon->skb = skb;
1696
1697         /*
1698          * Second we need to create the guardian byte.
1699          * We only need a single byte, so lets recycle
1700          * the 'flags' field we are not using for beacons.
1701          */
1702         guardian->flags = 0;
1703         usb_fill_bulk_urb(guardian->priv, usb_dev, pipe,
1704                           &guardian->flags, 1, rt2500usb_beacondone, guardian);
1705
1706         /*
1707          * Send out the guardian byte.
1708          */
1709         usb_submit_urb(guardian->priv, GFP_ATOMIC);
1710
1711         /*
1712          * Enable beacon generation.
1713          */
1714         rt2500usb_kick_tx_queue(rt2x00dev, IEEE80211_TX_QUEUE_BEACON);
1715
1716         return 0;
1717 }
1718
1719 static const struct ieee80211_ops rt2500usb_mac80211_ops = {
1720         .tx                     = rt2x00mac_tx,
1721         .start                  = rt2x00mac_start,
1722         .stop                   = rt2x00mac_stop,
1723         .add_interface          = rt2x00mac_add_interface,
1724         .remove_interface       = rt2x00mac_remove_interface,
1725         .config                 = rt2x00mac_config,
1726         .config_interface       = rt2x00mac_config_interface,
1727         .configure_filter       = rt2500usb_configure_filter,
1728         .get_stats              = rt2x00mac_get_stats,
1729         .erp_ie_changed         = rt2x00mac_erp_ie_changed,
1730         .conf_tx                = rt2x00mac_conf_tx,
1731         .get_tx_stats           = rt2x00mac_get_tx_stats,
1732         .beacon_update          = rt2500usb_beacon_update,
1733 };
1734
1735 static const struct rt2x00lib_ops rt2500usb_rt2x00_ops = {
1736         .probe_hw               = rt2500usb_probe_hw,
1737         .initialize             = rt2x00usb_initialize,
1738         .uninitialize           = rt2x00usb_uninitialize,
1739         .set_device_state       = rt2500usb_set_device_state,
1740         .link_stats             = rt2500usb_link_stats,
1741         .reset_tuner            = rt2500usb_reset_tuner,
1742         .link_tuner             = rt2500usb_link_tuner,
1743         .write_tx_desc          = rt2500usb_write_tx_desc,
1744         .write_tx_data          = rt2x00usb_write_tx_data,
1745         .get_tx_data_len        = rt2500usb_get_tx_data_len,
1746         .kick_tx_queue          = rt2500usb_kick_tx_queue,
1747         .fill_rxdone            = rt2500usb_fill_rxdone,
1748         .config_mac_addr        = rt2500usb_config_mac_addr,
1749         .config_bssid           = rt2500usb_config_bssid,
1750         .config_type            = rt2500usb_config_type,
1751         .config_preamble        = rt2500usb_config_preamble,
1752         .config                 = rt2500usb_config,
1753 };
1754
1755 static const struct rt2x00_ops rt2500usb_ops = {
1756         .name           = DRV_NAME,
1757         .rxd_size       = RXD_DESC_SIZE,
1758         .txd_size       = TXD_DESC_SIZE,
1759         .eeprom_size    = EEPROM_SIZE,
1760         .rf_size        = RF_SIZE,
1761         .lib            = &rt2500usb_rt2x00_ops,
1762         .hw             = &rt2500usb_mac80211_ops,
1763 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
1764         .debugfs        = &rt2500usb_rt2x00debug,
1765 #endif /* CONFIG_RT2X00_LIB_DEBUGFS */
1766 };
1767
1768 /*
1769  * rt2500usb module information.
1770  */
1771 static struct usb_device_id rt2500usb_device_table[] = {
1772         /* ASUS */
1773         { USB_DEVICE(0x0b05, 0x1706), USB_DEVICE_DATA(&rt2500usb_ops) },
1774         { USB_DEVICE(0x0b05, 0x1707), USB_DEVICE_DATA(&rt2500usb_ops) },
1775         /* Belkin */
1776         { USB_DEVICE(0x050d, 0x7050), USB_DEVICE_DATA(&rt2500usb_ops) },
1777         { USB_DEVICE(0x050d, 0x7051), USB_DEVICE_DATA(&rt2500usb_ops) },
1778         { USB_DEVICE(0x050d, 0x705a), USB_DEVICE_DATA(&rt2500usb_ops) },
1779         /* Cisco Systems */
1780         { USB_DEVICE(0x13b1, 0x000d), USB_DEVICE_DATA(&rt2500usb_ops) },
1781         { USB_DEVICE(0x13b1, 0x0011), USB_DEVICE_DATA(&rt2500usb_ops) },
1782         { USB_DEVICE(0x13b1, 0x001a), USB_DEVICE_DATA(&rt2500usb_ops) },
1783         /* Conceptronic */
1784         { USB_DEVICE(0x14b2, 0x3c02), USB_DEVICE_DATA(&rt2500usb_ops) },
1785         /* D-LINK */
1786         { USB_DEVICE(0x2001, 0x3c00), USB_DEVICE_DATA(&rt2500usb_ops) },
1787         /* Gigabyte */
1788         { USB_DEVICE(0x1044, 0x8001), USB_DEVICE_DATA(&rt2500usb_ops) },
1789         { USB_DEVICE(0x1044, 0x8007), USB_DEVICE_DATA(&rt2500usb_ops) },
1790         /* Hercules */
1791         { USB_DEVICE(0x06f8, 0xe000), USB_DEVICE_DATA(&rt2500usb_ops) },
1792         /* Melco */
1793         { USB_DEVICE(0x0411, 0x0066), USB_DEVICE_DATA(&rt2500usb_ops) },
1794         { USB_DEVICE(0x0411, 0x0067), USB_DEVICE_DATA(&rt2500usb_ops) },
1795         { USB_DEVICE(0x0411, 0x008b), USB_DEVICE_DATA(&rt2500usb_ops) },
1796         { USB_DEVICE(0x0411, 0x0097), USB_DEVICE_DATA(&rt2500usb_ops) },
1797
1798         /* MSI */
1799         { USB_DEVICE(0x0db0, 0x6861), USB_DEVICE_DATA(&rt2500usb_ops) },
1800         { USB_DEVICE(0x0db0, 0x6865), USB_DEVICE_DATA(&rt2500usb_ops) },
1801         { USB_DEVICE(0x0db0, 0x6869), USB_DEVICE_DATA(&rt2500usb_ops) },
1802         /* Ralink */
1803         { USB_DEVICE(0x148f, 0x1706), USB_DEVICE_DATA(&rt2500usb_ops) },
1804         { USB_DEVICE(0x148f, 0x2570), USB_DEVICE_DATA(&rt2500usb_ops) },
1805         { USB_DEVICE(0x148f, 0x2573), USB_DEVICE_DATA(&rt2500usb_ops) },
1806         { USB_DEVICE(0x148f, 0x9020), USB_DEVICE_DATA(&rt2500usb_ops) },
1807         /* Siemens */
1808         { USB_DEVICE(0x0681, 0x3c06), USB_DEVICE_DATA(&rt2500usb_ops) },
1809         /* SMC */
1810         { USB_DEVICE(0x0707, 0xee13), USB_DEVICE_DATA(&rt2500usb_ops) },
1811         /* Spairon */
1812         { USB_DEVICE(0x114b, 0x0110), USB_DEVICE_DATA(&rt2500usb_ops) },
1813         /* Trust */
1814         { USB_DEVICE(0x0eb0, 0x9020), USB_DEVICE_DATA(&rt2500usb_ops) },
1815         /* Zinwell */
1816         { USB_DEVICE(0x5a57, 0x0260), USB_DEVICE_DATA(&rt2500usb_ops) },
1817         { 0, }
1818 };
1819
1820 MODULE_AUTHOR(DRV_PROJECT);
1821 MODULE_VERSION(DRV_VERSION);
1822 MODULE_DESCRIPTION("Ralink RT2500 USB Wireless LAN driver.");
1823 MODULE_SUPPORTED_DEVICE("Ralink RT2570 USB chipset based cards");
1824 MODULE_DEVICE_TABLE(usb, rt2500usb_device_table);
1825 MODULE_LICENSE("GPL");
1826
1827 static struct usb_driver rt2500usb_driver = {
1828         .name           = DRV_NAME,
1829         .id_table       = rt2500usb_device_table,
1830         .probe          = rt2x00usb_probe,
1831         .disconnect     = rt2x00usb_disconnect,
1832         .suspend        = rt2x00usb_suspend,
1833         .resume         = rt2x00usb_resume,
1834 };
1835
1836 static int __init rt2500usb_init(void)
1837 {
1838         return usb_register(&rt2500usb_driver);
1839 }
1840
1841 static void __exit rt2500usb_exit(void)
1842 {
1843         usb_deregister(&rt2500usb_driver);
1844 }
1845
1846 module_init(rt2500usb_init);
1847 module_exit(rt2500usb_exit);