?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
b43: Convert usage of b43_phy_set()
[linux-2.6/btrfs-unstable.git] / drivers / net / wireless / b43 / lo.c
blobc334cfd63de7714a5c108c865d67c6c0c5d6ca35
1 /*
2
3 Broadcom B43 wireless driver
4
5 G PHY LO (LocalOscillator) Measuring and Control routines
6
7 Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>,
8 Copyright (c) 2005, 2006 Stefano Brivio <stefano.brivio@polimi.it>
9 Copyright (c) 2005-2007 Michael Buesch <mb@bu3sch.de>
10 Copyright (c) 2005, 2006 Danny van Dyk <kugelfang@gentoo.org>
11 Copyright (c) 2005, 2006 Andreas Jaggi <andreas.jaggi@waterwave.ch>
12
13 This program is free software; you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation; either version 2 of the License, or
16 (at your option) any later version.
17
18 This program is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 GNU General Public License for more details.
22
23 You should have received a copy of the GNU General Public License
24 along with this program; see the file COPYING. If not, write to
25 the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
26 Boston, MA 02110-1301, USA.
27
28 */
29
30 #include "b43.h"
31 #include "lo.h"
32 #include "phy_g.h"
33 #include "main.h"
34
35 #include <linux/delay.h>
36 #include <linux/sched.h>
37
38
39 static struct b43_lo_calib * b43_find_lo_calib(struct b43_txpower_lo_control *lo,
40 const struct b43_bbatt *bbatt,
41 const struct b43_rfatt *rfatt)
42 {
43 struct b43_lo_calib *c;
44
45 list_for_each_entry(c, &lo->calib_list, list) {
46 if (!b43_compare_bbatt(&c->bbatt, bbatt))
47 continue;
48 if (!b43_compare_rfatt(&c->rfatt, rfatt))
49 continue;
50 return c;
51 }
52
53 return NULL;
54 }
55
56 /* Write the LocalOscillator Control (adjust) value-pair. */
57 static void b43_lo_write(struct b43_wldev *dev, struct b43_loctl *control)
58 {
59 struct b43_phy *phy = &dev->phy;
60 u16 value;
61
62 if (B43_DEBUG) {
63 if (unlikely(abs(control->i) > 16 || abs(control->q) > 16)) {
64 b43dbg(dev->wl, "Invalid LO control pair "
65 "(I: %d, Q: %d)\n", control->i, control->q);
66 dump_stack();
67 return;
68 }
69 }
70 B43_WARN_ON(phy->type != B43_PHYTYPE_G);
71
72 value = (u8) (control->q);
73 value |= ((u8) (control->i)) << 8;
74 b43_phy_write(dev, B43_PHY_LO_CTL, value);
75 }
76
77 static u16 lo_measure_feedthrough(struct b43_wldev *dev,
78 u16 lna, u16 pga, u16 trsw_rx)
79 {
80 struct b43_phy *phy = &dev->phy;
81 u16 rfover;
82 u16 feedthrough;
83
84 if (phy->gmode) {
85 lna <<= B43_PHY_RFOVERVAL_LNA_SHIFT;
86 pga <<= B43_PHY_RFOVERVAL_PGA_SHIFT;
87
88 B43_WARN_ON(lna & ~B43_PHY_RFOVERVAL_LNA);
89 B43_WARN_ON(pga & ~B43_PHY_RFOVERVAL_PGA);
90 /*FIXME This assertion fails B43_WARN_ON(trsw_rx & ~(B43_PHY_RFOVERVAL_TRSWRX |
91 B43_PHY_RFOVERVAL_BW));
92 */
93 trsw_rx &= (B43_PHY_RFOVERVAL_TRSWRX | B43_PHY_RFOVERVAL_BW);
94
95 /* Construct the RF Override Value */
96 rfover = B43_PHY_RFOVERVAL_UNK;
97 rfover |= pga;
98 rfover |= lna;
99 rfover |= trsw_rx;
100 if ((dev->dev->bus->sprom.boardflags_lo & B43_BFL_EXTLNA)
101 && phy->rev > 6)
102 rfover |= B43_PHY_RFOVERVAL_EXTLNA;
103
104 b43_phy_write(dev, B43_PHY_PGACTL, 0xE300);
105 b43_phy_write(dev, B43_PHY_RFOVERVAL, rfover);
106 udelay(10);
107 rfover |= B43_PHY_RFOVERVAL_BW_LBW;
108 b43_phy_write(dev, B43_PHY_RFOVERVAL, rfover);
109 udelay(10);
110 rfover |= B43_PHY_RFOVERVAL_BW_LPF;
111 b43_phy_write(dev, B43_PHY_RFOVERVAL, rfover);
112 udelay(10);
113 b43_phy_write(dev, B43_PHY_PGACTL, 0xF300);
114 } else {
115 pga |= B43_PHY_PGACTL_UNKNOWN;
116 b43_phy_write(dev, B43_PHY_PGACTL, pga);
117 udelay(10);
118 pga |= B43_PHY_PGACTL_LOWBANDW;
119 b43_phy_write(dev, B43_PHY_PGACTL, pga);
120 udelay(10);
121 pga |= B43_PHY_PGACTL_LPF;
122 b43_phy_write(dev, B43_PHY_PGACTL, pga);
123 }
124 udelay(21);
125 feedthrough = b43_phy_read(dev, B43_PHY_LO_LEAKAGE);
126
127 /* This is a good place to check if we need to relax a bit,
128 * as this is the main function called regularly
129 * in the LO calibration. */
130 cond_resched();
131
132 return feedthrough;
133 }
134
135 /* TXCTL Register and Value Table.
136 * Returns the "TXCTL Register".
137 * "value" is the "TXCTL Value".
138 * "pad_mix_gain" is the PAD Mixer Gain.
139 */
140 static u16 lo_txctl_register_table(struct b43_wldev *dev,
141 u16 * value, u16 * pad_mix_gain)
142 {
143 struct b43_phy *phy = &dev->phy;
144 u16 reg, v, padmix;
145
146 if (phy->type == B43_PHYTYPE_B) {
147 v = 0x30;
148 if (phy->radio_rev <= 5) {
149 reg = 0x43;
150 padmix = 0;
151 } else {
152 reg = 0x52;
153 padmix = 5;
154 }
155 } else {
156 if (phy->rev >= 2 && phy->radio_rev == 8) {
157 reg = 0x43;
158 v = 0x10;
159 padmix = 2;
160 } else {
161 reg = 0x52;
162 v = 0x30;
163 padmix = 5;
164 }
165 }
166 if (value)
167 *value = v;
168 if (pad_mix_gain)
169 *pad_mix_gain = padmix;
170
171 return reg;
172 }
173
174 static void lo_measure_txctl_values(struct b43_wldev *dev)
175 {
176 struct b43_phy *phy = &dev->phy;
177 struct b43_phy_g *gphy = phy->g;
178 struct b43_txpower_lo_control *lo = gphy->lo_control;
179 u16 reg, mask;
180 u16 trsw_rx, pga;
181 u16 radio_pctl_reg;
182
183 static const u8 tx_bias_values[] = {
184 0x09, 0x08, 0x0A, 0x01, 0x00,
185 0x02, 0x05, 0x04, 0x06,
186 };
187 static const u8 tx_magn_values[] = {
188 0x70, 0x40,
189 };
190
191 if (!has_loopback_gain(phy)) {
192 radio_pctl_reg = 6;
193 trsw_rx = 2;
194 pga = 0;
195 } else {
196 int lb_gain; /* Loopback gain (in dB) */
197
198 trsw_rx = 0;
199 lb_gain = gphy->max_lb_gain / 2;
200 if (lb_gain > 10) {
201 radio_pctl_reg = 0;
202 pga = abs(10 - lb_gain) / 6;
203 pga = clamp_val(pga, 0, 15);
204 } else {
205 int cmp_val;
206 int tmp;
207
208 pga = 0;
209 cmp_val = 0x24;
210 if ((phy->rev >= 2) &&
211 (phy->radio_ver == 0x2050) && (phy->radio_rev == 8))
212 cmp_val = 0x3C;
213 tmp = lb_gain;
214 if ((10 - lb_gain) < cmp_val)
215 tmp = (10 - lb_gain);
216 if (tmp < 0)
217 tmp += 6;
218 else
219 tmp += 3;
220 cmp_val /= 4;
221 tmp /= 4;
222 if (tmp >= cmp_val)
223 radio_pctl_reg = cmp_val;
224 else
225 radio_pctl_reg = tmp;
226 }
227 }
228 b43_radio_write16(dev, 0x43, (b43_radio_read16(dev, 0x43)
229 & 0xFFF0) | radio_pctl_reg);
230 b43_gphy_set_baseband_attenuation(dev, 2);
231
232 reg = lo_txctl_register_table(dev, &mask, NULL);
233 mask = ~mask;
234 b43_radio_write16(dev, reg, b43_radio_read16(dev, reg)
235 & mask);
236
237 if (has_tx_magnification(phy)) {
238 int i, j;
239 int feedthrough;
240 int min_feedth = 0xFFFF;
241 u8 tx_magn, tx_bias;
242
243 for (i = 0; i < ARRAY_SIZE(tx_magn_values); i++) {
244 tx_magn = tx_magn_values[i];
245 b43_radio_write16(dev, 0x52,
246 (b43_radio_read16(dev, 0x52)
247 & 0xFF0F) | tx_magn);
248 for (j = 0; j < ARRAY_SIZE(tx_bias_values); j++) {
249 tx_bias = tx_bias_values[j];
250 b43_radio_write16(dev, 0x52,
251 (b43_radio_read16(dev, 0x52)
252 & 0xFFF0) | tx_bias);
253 feedthrough =
254 lo_measure_feedthrough(dev, 0, pga,
255 trsw_rx);
256 if (feedthrough < min_feedth) {
257 lo->tx_bias = tx_bias;
258 lo->tx_magn = tx_magn;
259 min_feedth = feedthrough;
260 }
261 if (lo->tx_bias == 0)
262 break;
263 }
264 b43_radio_write16(dev, 0x52,
265 (b43_radio_read16(dev, 0x52)
266 & 0xFF00) | lo->tx_bias | lo->
267 tx_magn);
268 }
269 } else {
270 lo->tx_magn = 0;
271 lo->tx_bias = 0;
272 b43_radio_write16(dev, 0x52, b43_radio_read16(dev, 0x52)
273 & 0xFFF0); /* TX bias == 0 */
274 }
275 lo->txctl_measured_time = jiffies;
276 }
277
278 static void lo_read_power_vector(struct b43_wldev *dev)
279 {
280 struct b43_phy *phy = &dev->phy;
281 struct b43_phy_g *gphy = phy->g;
282 struct b43_txpower_lo_control *lo = gphy->lo_control;
283 int i;
284 u64 tmp;
285 u64 power_vector = 0;
286
287 for (i = 0; i < 8; i += 2) {
288 tmp = b43_shm_read16(dev, B43_SHM_SHARED, 0x310 + i);
289 power_vector |= (tmp << (i * 8));
290 /* Clear the vector on the device. */
291 b43_shm_write16(dev, B43_SHM_SHARED, 0x310 + i, 0);
292 }
293 if (power_vector)
294 lo->power_vector = power_vector;
295 lo->pwr_vec_read_time = jiffies;
296 }
297
298 /* 802.11/LO/GPHY/MeasuringGains */
299 static void lo_measure_gain_values(struct b43_wldev *dev,
300 s16 max_rx_gain, int use_trsw_rx)
301 {
302 struct b43_phy *phy = &dev->phy;
303 struct b43_phy_g *gphy = phy->g;
304 u16 tmp;
305
306 if (max_rx_gain < 0)
307 max_rx_gain = 0;
308
309 if (has_loopback_gain(phy)) {
310 int trsw_rx = 0;
311 int trsw_rx_gain;
312
313 if (use_trsw_rx) {
314 trsw_rx_gain = gphy->trsw_rx_gain / 2;
315 if (max_rx_gain >= trsw_rx_gain) {
316 trsw_rx_gain = max_rx_gain - trsw_rx_gain;
317 trsw_rx = 0x20;
318 }
319 } else
320 trsw_rx_gain = max_rx_gain;
321 if (trsw_rx_gain < 9) {
322 gphy->lna_lod_gain = 0;
323 } else {
324 gphy->lna_lod_gain = 1;
325 trsw_rx_gain -= 8;
326 }
327 trsw_rx_gain = clamp_val(trsw_rx_gain, 0, 0x2D);
328 gphy->pga_gain = trsw_rx_gain / 3;
329 if (gphy->pga_gain >= 5) {
330 gphy->pga_gain -= 5;
331 gphy->lna_gain = 2;
332 } else
333 gphy->lna_gain = 0;
334 } else {
335 gphy->lna_gain = 0;
336 gphy->trsw_rx_gain = 0x20;
337 if (max_rx_gain >= 0x14) {
338 gphy->lna_lod_gain = 1;
339 gphy->pga_gain = 2;
340 } else if (max_rx_gain >= 0x12) {
341 gphy->lna_lod_gain = 1;
342 gphy->pga_gain = 1;
343 } else if (max_rx_gain >= 0xF) {
344 gphy->lna_lod_gain = 1;
345 gphy->pga_gain = 0;
346 } else {
347 gphy->lna_lod_gain = 0;
348 gphy->pga_gain = 0;
349 }
350 }
351
352 tmp = b43_radio_read16(dev, 0x7A);
353 if (gphy->lna_lod_gain == 0)
354 tmp &= ~0x0008;
355 else
356 tmp |= 0x0008;
357 b43_radio_write16(dev, 0x7A, tmp);
358 }
359
360 struct lo_g_saved_values {
361 u8 old_channel;
362
363 /* Core registers */
364 u16 reg_3F4;
365 u16 reg_3E2;
366
367 /* PHY registers */
368 u16 phy_lo_mask;
369 u16 phy_extg_01;
370 u16 phy_dacctl_hwpctl;
371 u16 phy_dacctl;
372 u16 phy_cck_14;
373 u16 phy_hpwr_tssictl;
374 u16 phy_analogover;
375 u16 phy_analogoverval;
376 u16 phy_rfover;
377 u16 phy_rfoverval;
378 u16 phy_classctl;
379 u16 phy_cck_3E;
380 u16 phy_crs0;
381 u16 phy_pgactl;
382 u16 phy_cck_2A;
383 u16 phy_syncctl;
384 u16 phy_cck_30;
385 u16 phy_cck_06;
386
387 /* Radio registers */
388 u16 radio_43;
389 u16 radio_7A;
390 u16 radio_52;
391 };
392
393 static void lo_measure_setup(struct b43_wldev *dev,
394 struct lo_g_saved_values *sav)
395 {
396 struct ssb_sprom *sprom = &dev->dev->bus->sprom;
397 struct b43_phy *phy = &dev->phy;
398 struct b43_phy_g *gphy = phy->g;
399 struct b43_txpower_lo_control *lo = gphy->lo_control;
400 u16 tmp;
401
402 if (b43_has_hardware_pctl(dev)) {
403 sav->phy_lo_mask = b43_phy_read(dev, B43_PHY_LO_MASK);
404 sav->phy_extg_01 = b43_phy_read(dev, B43_PHY_EXTG(0x01));
405 sav->phy_dacctl_hwpctl = b43_phy_read(dev, B43_PHY_DACCTL);
406 sav->phy_cck_14 = b43_phy_read(dev, B43_PHY_CCK(0x14));
407 sav->phy_hpwr_tssictl = b43_phy_read(dev, B43_PHY_HPWR_TSSICTL);
408
409 b43_phy_set(dev, B43_PHY_HPWR_TSSICTL, 0x100);
410 b43_phy_set(dev, B43_PHY_EXTG(0x01), 0x40);
411 b43_phy_set(dev, B43_PHY_DACCTL, 0x40);
412 b43_phy_set(dev, B43_PHY_CCK(0x14), 0x200);
413 }
414 if (phy->type == B43_PHYTYPE_B &&
415 phy->radio_ver == 0x2050 && phy->radio_rev < 6) {
416 b43_phy_write(dev, B43_PHY_CCK(0x16), 0x410);
417 b43_phy_write(dev, B43_PHY_CCK(0x17), 0x820);
418 }
419 if (phy->rev >= 2) {
420 sav->phy_analogover = b43_phy_read(dev, B43_PHY_ANALOGOVER);
421 sav->phy_analogoverval =
422 b43_phy_read(dev, B43_PHY_ANALOGOVERVAL);
423 sav->phy_rfover = b43_phy_read(dev, B43_PHY_RFOVER);
424 sav->phy_rfoverval = b43_phy_read(dev, B43_PHY_RFOVERVAL);
425 sav->phy_classctl = b43_phy_read(dev, B43_PHY_CLASSCTL);
426 sav->phy_cck_3E = b43_phy_read(dev, B43_PHY_CCK(0x3E));
427 sav->phy_crs0 = b43_phy_read(dev, B43_PHY_CRS0);
428
429 b43_phy_write(dev, B43_PHY_CLASSCTL,
430 b43_phy_read(dev, B43_PHY_CLASSCTL)
431 & 0xFFFC);
432 b43_phy_write(dev, B43_PHY_CRS0, b43_phy_read(dev, B43_PHY_CRS0)
433 & 0x7FFF);
434 b43_phy_set(dev, B43_PHY_ANALOGOVER, 0x0003);
435 b43_phy_write(dev, B43_PHY_ANALOGOVERVAL,
436 b43_phy_read(dev, B43_PHY_ANALOGOVERVAL)
437 & 0xFFFC);
438 if (phy->type == B43_PHYTYPE_G) {
439 if ((phy->rev >= 7) &&
440 (sprom->boardflags_lo & B43_BFL_EXTLNA)) {
441 b43_phy_write(dev, B43_PHY_RFOVER, 0x933);
442 } else {
443 b43_phy_write(dev, B43_PHY_RFOVER, 0x133);
444 }
445 } else {
446 b43_phy_write(dev, B43_PHY_RFOVER, 0);
447 }
448 b43_phy_write(dev, B43_PHY_CCK(0x3E), 0);
449 }
450 sav->reg_3F4 = b43_read16(dev, 0x3F4);
451 sav->reg_3E2 = b43_read16(dev, 0x3E2);
452 sav->radio_43 = b43_radio_read16(dev, 0x43);
453 sav->radio_7A = b43_radio_read16(dev, 0x7A);
454 sav->phy_pgactl = b43_phy_read(dev, B43_PHY_PGACTL);
455 sav->phy_cck_2A = b43_phy_read(dev, B43_PHY_CCK(0x2A));
456 sav->phy_syncctl = b43_phy_read(dev, B43_PHY_SYNCCTL);
457 sav->phy_dacctl = b43_phy_read(dev, B43_PHY_DACCTL);
458
459 if (!has_tx_magnification(phy)) {
460 sav->radio_52 = b43_radio_read16(dev, 0x52);
461 sav->radio_52 &= 0x00F0;
462 }
463 if (phy->type == B43_PHYTYPE_B) {
464 sav->phy_cck_30 = b43_phy_read(dev, B43_PHY_CCK(0x30));
465 sav->phy_cck_06 = b43_phy_read(dev, B43_PHY_CCK(0x06));
466 b43_phy_write(dev, B43_PHY_CCK(0x30), 0x00FF);
467 b43_phy_write(dev, B43_PHY_CCK(0x06), 0x3F3F);
468 } else {
469 b43_write16(dev, 0x3E2, b43_read16(dev, 0x3E2)
470 | 0x8000);
471 }
472 b43_write16(dev, 0x3F4, b43_read16(dev, 0x3F4)
473 & 0xF000);
474
475 tmp =
476 (phy->type == B43_PHYTYPE_G) ? B43_PHY_LO_MASK : B43_PHY_CCK(0x2E);
477 b43_phy_write(dev, tmp, 0x007F);
478
479 tmp = sav->phy_syncctl;
480 b43_phy_write(dev, B43_PHY_SYNCCTL, tmp & 0xFF7F);
481 tmp = sav->radio_7A;
482 b43_radio_write16(dev, 0x007A, tmp & 0xFFF0);
483
484 b43_phy_write(dev, B43_PHY_CCK(0x2A), 0x8A3);
485 if (phy->type == B43_PHYTYPE_G ||
486 (phy->type == B43_PHYTYPE_B &&
487 phy->radio_ver == 0x2050 && phy->radio_rev >= 6)) {
488 b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x1003);
489 } else
490 b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x0802);
491 if (phy->rev >= 2)
492 b43_dummy_transmission(dev);
493 b43_gphy_channel_switch(dev, 6, 0);
494 b43_radio_read16(dev, 0x51); /* dummy read */
495 if (phy->type == B43_PHYTYPE_G)
496 b43_phy_write(dev, B43_PHY_CCK(0x2F), 0);
497
498 /* Re-measure the txctl values, if needed. */
499 if (time_before(lo->txctl_measured_time,
500 jiffies - B43_LO_TXCTL_EXPIRE))
501 lo_measure_txctl_values(dev);
502
503 if (phy->type == B43_PHYTYPE_G && phy->rev >= 3) {
504 b43_phy_write(dev, B43_PHY_LO_MASK, 0xC078);
505 } else {
506 if (phy->type == B43_PHYTYPE_B)
507 b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078);
508 else
509 b43_phy_write(dev, B43_PHY_LO_MASK, 0x8078);
510 }
511 }
512
513 static void lo_measure_restore(struct b43_wldev *dev,
514 struct lo_g_saved_values *sav)
515 {
516 struct b43_phy *phy = &dev->phy;
517 struct b43_phy_g *gphy = phy->g;
518 u16 tmp;
519
520 if (phy->rev >= 2) {
521 b43_phy_write(dev, B43_PHY_PGACTL, 0xE300);
522 tmp = (gphy->pga_gain << 8);
523 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA0);
524 udelay(5);
525 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA2);
526 udelay(2);
527 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA3);
528 } else {
529 tmp = (gphy->pga_gain | 0xEFA0);
530 b43_phy_write(dev, B43_PHY_PGACTL, tmp);
531 }
532 if (phy->type == B43_PHYTYPE_G) {
533 if (phy->rev >= 3)
534 b43_phy_write(dev, B43_PHY_CCK(0x2E), 0xC078);
535 else
536 b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078);
537 if (phy->rev >= 2)
538 b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0202);
539 else
540 b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0101);
541 }
542 b43_write16(dev, 0x3F4, sav->reg_3F4);
543 b43_phy_write(dev, B43_PHY_PGACTL, sav->phy_pgactl);
544 b43_phy_write(dev, B43_PHY_CCK(0x2A), sav->phy_cck_2A);
545 b43_phy_write(dev, B43_PHY_SYNCCTL, sav->phy_syncctl);
546 b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl);
547 b43_radio_write16(dev, 0x43, sav->radio_43);
548 b43_radio_write16(dev, 0x7A, sav->radio_7A);
549 if (!has_tx_magnification(phy)) {
550 tmp = sav->radio_52;
551 b43_radio_write16(dev, 0x52, (b43_radio_read16(dev, 0x52)
552 & 0xFF0F) | tmp);
553 }
554 b43_write16(dev, 0x3E2, sav->reg_3E2);
555 if (phy->type == B43_PHYTYPE_B &&
556 phy->radio_ver == 0x2050 && phy->radio_rev <= 5) {
557 b43_phy_write(dev, B43_PHY_CCK(0x30), sav->phy_cck_30);
558 b43_phy_write(dev, B43_PHY_CCK(0x06), sav->phy_cck_06);
559 }
560 if (phy->rev >= 2) {
561 b43_phy_write(dev, B43_PHY_ANALOGOVER, sav->phy_analogover);
562 b43_phy_write(dev, B43_PHY_ANALOGOVERVAL,
563 sav->phy_analogoverval);
564 b43_phy_write(dev, B43_PHY_CLASSCTL, sav->phy_classctl);
565 b43_phy_write(dev, B43_PHY_RFOVER, sav->phy_rfover);
566 b43_phy_write(dev, B43_PHY_RFOVERVAL, sav->phy_rfoverval);
567 b43_phy_write(dev, B43_PHY_CCK(0x3E), sav->phy_cck_3E);
568 b43_phy_write(dev, B43_PHY_CRS0, sav->phy_crs0);
569 }
570 if (b43_has_hardware_pctl(dev)) {
571 tmp = (sav->phy_lo_mask & 0xBFFF);
572 b43_phy_write(dev, B43_PHY_LO_MASK, tmp);
573 b43_phy_write(dev, B43_PHY_EXTG(0x01), sav->phy_extg_01);
574 b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl_hwpctl);
575 b43_phy_write(dev, B43_PHY_CCK(0x14), sav->phy_cck_14);
576 b43_phy_write(dev, B43_PHY_HPWR_TSSICTL, sav->phy_hpwr_tssictl);
577 }
578 b43_gphy_channel_switch(dev, sav->old_channel, 1);
579 }
580
581 struct b43_lo_g_statemachine {
582 int current_state;
583 int nr_measured;
584 int state_val_multiplier;
585 u16 lowest_feedth;
586 struct b43_loctl min_loctl;
587 };
588
589 /* Loop over each possible value in this state. */
590 static int lo_probe_possible_loctls(struct b43_wldev *dev,
591 struct b43_loctl *probe_loctl,
592 struct b43_lo_g_statemachine *d)
593 {
594 struct b43_phy *phy = &dev->phy;
595 struct b43_phy_g *gphy = phy->g;
596 struct b43_loctl test_loctl;
597 struct b43_loctl orig_loctl;
598 struct b43_loctl prev_loctl = {
599 .i = -100,
600 .q = -100,
601 };
602 int i;
603 int begin, end;
604 int found_lower = 0;
605 u16 feedth;
606
607 static const struct b43_loctl modifiers[] = {
608 {.i = 1,.q = 1,},
609 {.i = 1,.q = 0,},
610 {.i = 1,.q = -1,},
611 {.i = 0,.q = -1,},
612 {.i = -1,.q = -1,},
613 {.i = -1,.q = 0,},
614 {.i = -1,.q = 1,},
615 {.i = 0,.q = 1,},
616 };
617
618 if (d->current_state == 0) {
619 begin = 1;
620 end = 8;
621 } else if (d->current_state % 2 == 0) {
622 begin = d->current_state - 1;
623 end = d->current_state + 1;
624 } else {
625 begin = d->current_state - 2;
626 end = d->current_state + 2;
627 }
628 if (begin < 1)
629 begin += 8;
630 if (end > 8)
631 end -= 8;
632
633 memcpy(&orig_loctl, probe_loctl, sizeof(struct b43_loctl));
634 i = begin;
635 d->current_state = i;
636 while (1) {
637 B43_WARN_ON(!(i >= 1 && i <= 8));
638 memcpy(&test_loctl, &orig_loctl, sizeof(struct b43_loctl));
639 test_loctl.i += modifiers[i - 1].i * d->state_val_multiplier;
640 test_loctl.q += modifiers[i - 1].q * d->state_val_multiplier;
641 if ((test_loctl.i != prev_loctl.i ||
642 test_loctl.q != prev_loctl.q) &&
643 (abs(test_loctl.i) <= 16 && abs(test_loctl.q) <= 16)) {
644 b43_lo_write(dev, &test_loctl);
645 feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
646 gphy->pga_gain,
647 gphy->trsw_rx_gain);
648 if (feedth < d->lowest_feedth) {
649 memcpy(probe_loctl, &test_loctl,
650 sizeof(struct b43_loctl));
651 found_lower = 1;
652 d->lowest_feedth = feedth;
653 if ((d->nr_measured < 2) &&
654 !has_loopback_gain(phy))
655 break;
656 }
657 }
658 memcpy(&prev_loctl, &test_loctl, sizeof(prev_loctl));
659 if (i == end)
660 break;
661 if (i == 8)
662 i = 1;
663 else
664 i++;
665 d->current_state = i;
666 }
667
668 return found_lower;
669 }
670
671 static void lo_probe_loctls_statemachine(struct b43_wldev *dev,
672 struct b43_loctl *loctl,
673 int *max_rx_gain)
674 {
675 struct b43_phy *phy = &dev->phy;
676 struct b43_phy_g *gphy = phy->g;
677 struct b43_lo_g_statemachine d;
678 u16 feedth;
679 int found_lower;
680 struct b43_loctl probe_loctl;
681 int max_repeat = 1, repeat_cnt = 0;
682
683 d.nr_measured = 0;
684 d.state_val_multiplier = 1;
685 if (has_loopback_gain(phy))
686 d.state_val_multiplier = 3;
687
688 memcpy(&d.min_loctl, loctl, sizeof(struct b43_loctl));
689 if (has_loopback_gain(phy))
690 max_repeat = 4;
691 do {
692 b43_lo_write(dev, &d.min_loctl);
693 feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
694 gphy->pga_gain,
695 gphy->trsw_rx_gain);
696 if (feedth < 0x258) {
697 if (feedth >= 0x12C)
698 *max_rx_gain += 6;
699 else
700 *max_rx_gain += 3;
701 feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
702 gphy->pga_gain,
703 gphy->trsw_rx_gain);
704 }
705 d.lowest_feedth = feedth;
706
707 d.current_state = 0;
708 do {
709 B43_WARN_ON(!
710 (d.current_state >= 0
711 && d.current_state <= 8));
712 memcpy(&probe_loctl, &d.min_loctl,
713 sizeof(struct b43_loctl));
714 found_lower =
715 lo_probe_possible_loctls(dev, &probe_loctl, &d);
716 if (!found_lower)
717 break;
718 if ((probe_loctl.i == d.min_loctl.i) &&
719 (probe_loctl.q == d.min_loctl.q))
720 break;
721 memcpy(&d.min_loctl, &probe_loctl,
722 sizeof(struct b43_loctl));
723 d.nr_measured++;
724 } while (d.nr_measured < 24);
725 memcpy(loctl, &d.min_loctl, sizeof(struct b43_loctl));
726
727 if (has_loopback_gain(phy)) {
728 if (d.lowest_feedth > 0x1194)
729 *max_rx_gain -= 6;
730 else if (d.lowest_feedth < 0x5DC)
731 *max_rx_gain += 3;
732 if (repeat_cnt == 0) {
733 if (d.lowest_feedth <= 0x5DC) {
734 d.state_val_multiplier = 1;
735 repeat_cnt++;
736 } else
737 d.state_val_multiplier = 2;
738 } else if (repeat_cnt == 2)
739 d.state_val_multiplier = 1;
740 }
741 lo_measure_gain_values(dev, *max_rx_gain,
742 has_loopback_gain(phy));
743 } while (++repeat_cnt < max_repeat);
744 }
745
746 static
747 struct b43_lo_calib * b43_calibrate_lo_setting(struct b43_wldev *dev,
748 const struct b43_bbatt *bbatt,
749 const struct b43_rfatt *rfatt)
750 {
751 struct b43_phy *phy = &dev->phy;
752 struct b43_phy_g *gphy = phy->g;
753 struct b43_loctl loctl = {
754 .i = 0,
755 .q = 0,
756 };
757 int max_rx_gain;
758 struct b43_lo_calib *cal;
759 struct lo_g_saved_values uninitialized_var(saved_regs);
760 /* Values from the "TXCTL Register and Value Table" */
761 u16 txctl_reg;
762 u16 txctl_value;
763 u16 pad_mix_gain;
764
765 saved_regs.old_channel = phy->channel;
766 b43_mac_suspend(dev);
767 lo_measure_setup(dev, &saved_regs);
768
769 txctl_reg = lo_txctl_register_table(dev, &txctl_value, &pad_mix_gain);
770
771 b43_radio_write16(dev, 0x43,
772 (b43_radio_read16(dev, 0x43) & 0xFFF0)
773 | rfatt->att);
774 b43_radio_write16(dev, txctl_reg,
775 (b43_radio_read16(dev, txctl_reg) & ~txctl_value)
776 | (rfatt->with_padmix ? txctl_value : 0));
777
778 max_rx_gain = rfatt->att * 2;
779 max_rx_gain += bbatt->att / 2;
780 if (rfatt->with_padmix)
781 max_rx_gain -= pad_mix_gain;
782 if (has_loopback_gain(phy))
783 max_rx_gain += gphy->max_lb_gain;
784 lo_measure_gain_values(dev, max_rx_gain,
785 has_loopback_gain(phy));
786
787 b43_gphy_set_baseband_attenuation(dev, bbatt->att);
788 lo_probe_loctls_statemachine(dev, &loctl, &max_rx_gain);
789
790 lo_measure_restore(dev, &saved_regs);
791 b43_mac_enable(dev);
792
793 if (b43_debug(dev, B43_DBG_LO)) {
794 b43dbg(dev->wl, "LO: Calibrated for BB(%u), RF(%u,%u) "
795 "=> I=%d Q=%d\n",
796 bbatt->att, rfatt->att, rfatt->with_padmix,
797 loctl.i, loctl.q);
798 }
799
800 cal = kmalloc(sizeof(*cal), GFP_KERNEL);
801 if (!cal) {
802 b43warn(dev->wl, "LO calib: out of memory\n");
803 return NULL;
804 }
805 memcpy(&cal->bbatt, bbatt, sizeof(*bbatt));
806 memcpy(&cal->rfatt, rfatt, sizeof(*rfatt));
807 memcpy(&cal->ctl, &loctl, sizeof(loctl));
808 cal->calib_time = jiffies;
809 INIT_LIST_HEAD(&cal->list);
810
811 return cal;
812 }
813
814 /* Get a calibrated LO setting for the given attenuation values.
815 * Might return a NULL pointer under OOM! */
816 static
817 struct b43_lo_calib * b43_get_calib_lo_settings(struct b43_wldev *dev,
818 const struct b43_bbatt *bbatt,
819 const struct b43_rfatt *rfatt)
820 {
821 struct b43_txpower_lo_control *lo = dev->phy.g->lo_control;
822 struct b43_lo_calib *c;
823
824 c = b43_find_lo_calib(lo, bbatt, rfatt);
825 if (c)
826 return c;
827 /* Not in the list of calibrated LO settings.
828 * Calibrate it now. */
829 c = b43_calibrate_lo_setting(dev, bbatt, rfatt);
830 if (!c)
831 return NULL;
832 list_add(&c->list, &lo->calib_list);
833
834 return c;
835 }
836
837 void b43_gphy_dc_lt_init(struct b43_wldev *dev, bool update_all)
838 {
839 struct b43_phy *phy = &dev->phy;
840 struct b43_phy_g *gphy = phy->g;
841 struct b43_txpower_lo_control *lo = gphy->lo_control;
842 int i;
843 int rf_offset, bb_offset;
844 const struct b43_rfatt *rfatt;
845 const struct b43_bbatt *bbatt;
846 u64 power_vector;
847 bool table_changed = 0;
848
849 BUILD_BUG_ON(B43_DC_LT_SIZE != 32);
850 B43_WARN_ON(lo->rfatt_list.len * lo->bbatt_list.len > 64);
851
852 power_vector = lo->power_vector;
853 if (!update_all && !power_vector)
854 return; /* Nothing to do. */
855
856 /* Suspend the MAC now to avoid continuous suspend/enable
857 * cycles in the loop. */
858 b43_mac_suspend(dev);
859
860 for (i = 0; i < B43_DC_LT_SIZE * 2; i++) {
861 struct b43_lo_calib *cal;
862 int idx;
863 u16 val;
864
865 if (!update_all && !(power_vector & (((u64)1ULL) << i)))
866 continue;
867 /* Update the table entry for this power_vector bit.
868 * The table rows are RFatt entries and columns are BBatt. */
869 bb_offset = i / lo->rfatt_list.len;
870 rf_offset = i % lo->rfatt_list.len;
871 bbatt = &(lo->bbatt_list.list[bb_offset]);
872 rfatt = &(lo->rfatt_list.list[rf_offset]);
873
874 cal = b43_calibrate_lo_setting(dev, bbatt, rfatt);
875 if (!cal) {
876 b43warn(dev->wl, "LO: Could not "
877 "calibrate DC table entry\n");
878 continue;
879 }
880 /*FIXME: Is Q really in the low nibble? */
881 val = (u8)(cal->ctl.q);
882 val |= ((u8)(cal->ctl.i)) << 4;
883 kfree(cal);
884
885 /* Get the index into the hardware DC LT. */
886 idx = i / 2;
887 /* Change the table in memory. */
888 if (i % 2) {
889 /* Change the high byte. */
890 lo->dc_lt[idx] = (lo->dc_lt[idx] & 0x00FF)
891 | ((val & 0x00FF) << 8);
892 } else {
893 /* Change the low byte. */
894 lo->dc_lt[idx] = (lo->dc_lt[idx] & 0xFF00)
895 | (val & 0x00FF);
896 }
897 table_changed = 1;
898 }
899 if (table_changed) {
900 /* The table changed in memory. Update the hardware table. */
901 for (i = 0; i < B43_DC_LT_SIZE; i++)
902 b43_phy_write(dev, 0x3A0 + i, lo->dc_lt[i]);
903 }
904 b43_mac_enable(dev);
905 }
906
907 /* Fixup the RF attenuation value for the case where we are
908 * using the PAD mixer. */
909 static inline void b43_lo_fixup_rfatt(struct b43_rfatt *rf)
910 {
911 if (!rf->with_padmix)
912 return;
913 if ((rf->att != 1) && (rf->att != 2) && (rf->att != 3))
914 rf->att = 4;
915 }
916
917 void b43_lo_g_adjust(struct b43_wldev *dev)
918 {
919 struct b43_phy_g *gphy = dev->phy.g;
920 struct b43_lo_calib *cal;
921 struct b43_rfatt rf;
922
923 memcpy(&rf, &gphy->rfatt, sizeof(rf));
924 b43_lo_fixup_rfatt(&rf);
925
926 cal = b43_get_calib_lo_settings(dev, &gphy->bbatt, &rf);
927 if (!cal)
928 return;
929 b43_lo_write(dev, &cal->ctl);
930 }
931
932 void b43_lo_g_adjust_to(struct b43_wldev *dev,
933 u16 rfatt, u16 bbatt, u16 tx_control)
934 {
935 struct b43_rfatt rf;
936 struct b43_bbatt bb;
937 struct b43_lo_calib *cal;
938
939 memset(&rf, 0, sizeof(rf));
940 memset(&bb, 0, sizeof(bb));
941 rf.att = rfatt;
942 bb.att = bbatt;
943 b43_lo_fixup_rfatt(&rf);
944 cal = b43_get_calib_lo_settings(dev, &bb, &rf);
945 if (!cal)
946 return;
947 b43_lo_write(dev, &cal->ctl);
948 }
949
950 /* Periodic LO maintanance work */
951 void b43_lo_g_maintanance_work(struct b43_wldev *dev)
952 {
953 struct b43_phy *phy = &dev->phy;
954 struct b43_phy_g *gphy = phy->g;
955 struct b43_txpower_lo_control *lo = gphy->lo_control;
956 unsigned long now;
957 unsigned long expire;
958 struct b43_lo_calib *cal, *tmp;
959 bool current_item_expired = 0;
960 bool hwpctl;
961
962 if (!lo)
963 return;
964 now = jiffies;
965 hwpctl = b43_has_hardware_pctl(dev);
966
967 if (hwpctl) {
968 /* Read the power vector and update it, if needed. */
969 expire = now - B43_LO_PWRVEC_EXPIRE;
970 if (time_before(lo->pwr_vec_read_time, expire)) {
971 lo_read_power_vector(dev);
972 b43_gphy_dc_lt_init(dev, 0);
973 }
974 //FIXME Recalc the whole DC table from time to time?
975 }
976
977 if (hwpctl)
978 return;
979 /* Search for expired LO settings. Remove them.
980 * Recalibrate the current setting, if expired. */
981 expire = now - B43_LO_CALIB_EXPIRE;
982 list_for_each_entry_safe(cal, tmp, &lo->calib_list, list) {
983 if (!time_before(cal->calib_time, expire))
984 continue;
985 /* This item expired. */
986 if (b43_compare_bbatt(&cal->bbatt, &gphy->bbatt) &&
987 b43_compare_rfatt(&cal->rfatt, &gphy->rfatt)) {
988 B43_WARN_ON(current_item_expired);
989 current_item_expired = 1;
990 }
991 if (b43_debug(dev, B43_DBG_LO)) {
992 b43dbg(dev->wl, "LO: Item BB(%u), RF(%u,%u), "
993 "I=%d, Q=%d expired\n",
994 cal->bbatt.att, cal->rfatt.att,
995 cal->rfatt.with_padmix,
996 cal->ctl.i, cal->ctl.q);
997 }
998 list_del(&cal->list);
999 kfree(cal);
1000 }
1001 if (current_item_expired || unlikely(list_empty(&lo->calib_list))) {
1002 /* Recalibrate currently used LO setting. */
1003 if (b43_debug(dev, B43_DBG_LO))
1004 b43dbg(dev->wl, "LO: Recalibrating current LO setting\n");
1005 cal = b43_calibrate_lo_setting(dev, &gphy->bbatt, &gphy->rfatt);
1006 if (cal) {
1007 list_add(&cal->list, &lo->calib_list);
1008 b43_lo_write(dev, &cal->ctl);
1009 } else
1010 b43warn(dev->wl, "Failed to recalibrate current LO setting\n");
1011 }
1012 }
1013
1014 void b43_lo_g_cleanup(struct b43_wldev *dev)
1015 {
1016 struct b43_txpower_lo_control *lo = dev->phy.g->lo_control;
1017 struct b43_lo_calib *cal, *tmp;
1018
1019 if (!lo)
1020 return;
1021 list_for_each_entry_safe(cal, tmp, &lo->calib_list, list) {
1022 list_del(&cal->list);
1023 kfree(cal);
1024 }
1025 }
1026
1027 /* LO Initialization */
1028 void b43_lo_g_init(struct b43_wldev *dev)
1029 {
1030 if (b43_has_hardware_pctl(dev)) {
1031 lo_read_power_vector(dev);
1032 b43_gphy_dc_lt_init(dev, 1);
1033 }
1034 }
(deprecated) Btrfs devel tree