tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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.h"
33#include "main.h"
34
35#include <linux/delay.h>
36#include <linux/sched.h>
37
38
39static 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. */
57static 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
77static 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 */
140static 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
174static void lo_measure_txctl_values(struct b43_wldev *dev)
175{
176 struct b43_phy *phy = &dev->phy;
177 struct b43_txpower_lo_control *lo = phy->lo_control;
178 u16 reg, mask;
179 u16 trsw_rx, pga;
180 u16 radio_pctl_reg;
181
182 static const u8 tx_bias_values[] = {
183 0x09, 0x08, 0x0A, 0x01, 0x00,
184 0x02, 0x05, 0x04, 0x06,
185 };
186 static const u8 tx_magn_values[] = {
187 0x70, 0x40,
188 };
189
190 if (!has_loopback_gain(phy)) {
191 radio_pctl_reg = 6;
192 trsw_rx = 2;
193 pga = 0;
194 } else {
195 int lb_gain; /* Loopback gain (in dB) */
196
197 trsw_rx = 0;
198 lb_gain = phy->max_lb_gain / 2;
199 if (lb_gain > 10) {
200 radio_pctl_reg = 0;
201 pga = abs(10 - lb_gain) / 6;
202 pga = clamp_val(pga, 0, 15);
203 } else {
204 int cmp_val;
205 int tmp;
206
207 pga = 0;
208 cmp_val = 0x24;
209 if ((phy->rev >= 2) &&
210 (phy->radio_ver == 0x2050) && (phy->radio_rev == 8))
211 cmp_val = 0x3C;
212 tmp = lb_gain;
213 if ((10 - lb_gain) < cmp_val)
214 tmp = (10 - lb_gain);
215 if (tmp < 0)
216 tmp += 6;
217 else
218 tmp += 3;
219 cmp_val /= 4;
220 tmp /= 4;
221 if (tmp >= cmp_val)
222 radio_pctl_reg = cmp_val;
223 else
224 radio_pctl_reg = tmp;
225 }
226 }
227 b43_radio_write16(dev, 0x43, (b43_radio_read16(dev, 0x43)
228 & 0xFFF0) | radio_pctl_reg);
229 b43_phy_set_baseband_attenuation(dev, 2);
230
231 reg = lo_txctl_register_table(dev, &mask, NULL);
232 mask = ~mask;
233 b43_radio_write16(dev, reg, b43_radio_read16(dev, reg)
234 & mask);
235
236 if (has_tx_magnification(phy)) {
237 int i, j;
238 int feedthrough;
239 int min_feedth = 0xFFFF;
240 u8 tx_magn, tx_bias;
241
242 for (i = 0; i < ARRAY_SIZE(tx_magn_values); i++) {
243 tx_magn = tx_magn_values[i];
244 b43_radio_write16(dev, 0x52,
245 (b43_radio_read16(dev, 0x52)
246 & 0xFF0F) | tx_magn);
247 for (j = 0; j < ARRAY_SIZE(tx_bias_values); j++) {
248 tx_bias = tx_bias_values[j];
249 b43_radio_write16(dev, 0x52,
250 (b43_radio_read16(dev, 0x52)
251 & 0xFFF0) | tx_bias);
252 feedthrough =
253 lo_measure_feedthrough(dev, 0, pga,
254 trsw_rx);
255 if (feedthrough < min_feedth) {
256 lo->tx_bias = tx_bias;
257 lo->tx_magn = tx_magn;
258 min_feedth = feedthrough;
259 }
260 if (lo->tx_bias == 0)
261 break;
262 }
263 b43_radio_write16(dev, 0x52,
264 (b43_radio_read16(dev, 0x52)
265 & 0xFF00) | lo->tx_bias | lo->
266 tx_magn);
267 }
268 } else {
269 lo->tx_magn = 0;
270 lo->tx_bias = 0;
271 b43_radio_write16(dev, 0x52, b43_radio_read16(dev, 0x52)
272 & 0xFFF0); /* TX bias == 0 */
273 }
274 lo->txctl_measured_time = jiffies;
275}
276
277static void lo_read_power_vector(struct b43_wldev *dev)
278{
279 struct b43_phy *phy = &dev->phy;
280 struct b43_txpower_lo_control *lo = phy->lo_control;
281 int i;
282 u64 tmp;
283 u64 power_vector = 0;
284
285 for (i = 0; i < 8; i += 2) {
286 tmp = b43_shm_read16(dev, B43_SHM_SHARED, 0x310 + i);
287 power_vector |= (tmp << (i * 8));
288 /* Clear the vector on the device. */
289 b43_shm_write16(dev, B43_SHM_SHARED, 0x310 + i, 0);
290 }
291 if (power_vector)
292 lo->power_vector = power_vector;
293 lo->pwr_vec_read_time = jiffies;
294}
295
296/* 802.11/LO/GPHY/MeasuringGains */
297static void lo_measure_gain_values(struct b43_wldev *dev,
298 s16 max_rx_gain, int use_trsw_rx)
299{
300 struct b43_phy *phy = &dev->phy;
301 u16 tmp;
302
303 if (max_rx_gain < 0)
304 max_rx_gain = 0;
305
306 if (has_loopback_gain(phy)) {
307 int trsw_rx = 0;
308 int trsw_rx_gain;
309
310 if (use_trsw_rx) {
311 trsw_rx_gain = phy->trsw_rx_gain / 2;
312 if (max_rx_gain >= trsw_rx_gain) {
313 trsw_rx_gain = max_rx_gain - trsw_rx_gain;
314 trsw_rx = 0x20;
315 }
316 } else
317 trsw_rx_gain = max_rx_gain;
318 if (trsw_rx_gain < 9) {
319 phy->lna_lod_gain = 0;
320 } else {
321 phy->lna_lod_gain = 1;
322 trsw_rx_gain -= 8;
323 }
324 trsw_rx_gain = clamp_val(trsw_rx_gain, 0, 0x2D);
325 phy->pga_gain = trsw_rx_gain / 3;
326 if (phy->pga_gain >= 5) {
327 phy->pga_gain -= 5;
328 phy->lna_gain = 2;
329 } else
330 phy->lna_gain = 0;
331 } else {
332 phy->lna_gain = 0;
333 phy->trsw_rx_gain = 0x20;
334 if (max_rx_gain >= 0x14) {
335 phy->lna_lod_gain = 1;
336 phy->pga_gain = 2;
337 } else if (max_rx_gain >= 0x12) {
338 phy->lna_lod_gain = 1;
339 phy->pga_gain = 1;
340 } else if (max_rx_gain >= 0xF) {
341 phy->lna_lod_gain = 1;
342 phy->pga_gain = 0;
343 } else {
344 phy->lna_lod_gain = 0;
345 phy->pga_gain = 0;
346 }
347 }
348
349 tmp = b43_radio_read16(dev, 0x7A);
350 if (phy->lna_lod_gain == 0)
351 tmp &= ~0x0008;
352 else
353 tmp |= 0x0008;
354 b43_radio_write16(dev, 0x7A, tmp);
355}
356
357struct lo_g_saved_values {
358 u8 old_channel;
359
360 /* Core registers */
361 u16 reg_3F4;
362 u16 reg_3E2;
363
364 /* PHY registers */
365 u16 phy_lo_mask;
366 u16 phy_extg_01;
367 u16 phy_dacctl_hwpctl;
368 u16 phy_dacctl;
369 u16 phy_cck_14;
370 u16 phy_hpwr_tssictl;
371 u16 phy_analogover;
372 u16 phy_analogoverval;
373 u16 phy_rfover;
374 u16 phy_rfoverval;
375 u16 phy_classctl;
376 u16 phy_cck_3E;
377 u16 phy_crs0;
378 u16 phy_pgactl;
379 u16 phy_cck_2A;
380 u16 phy_syncctl;
381 u16 phy_cck_30;
382 u16 phy_cck_06;
383
384 /* Radio registers */
385 u16 radio_43;
386 u16 radio_7A;
387 u16 radio_52;
388};
389
390static void lo_measure_setup(struct b43_wldev *dev,
391 struct lo_g_saved_values *sav)
392{
393 struct ssb_sprom *sprom = &dev->dev->bus->sprom;
394 struct b43_phy *phy = &dev->phy;
395 struct b43_txpower_lo_control *lo = phy->lo_control;
396 u16 tmp;
397
398 if (b43_has_hardware_pctl(phy)) {
399 sav->phy_lo_mask = b43_phy_read(dev, B43_PHY_LO_MASK);
400 sav->phy_extg_01 = b43_phy_read(dev, B43_PHY_EXTG(0x01));
401 sav->phy_dacctl_hwpctl = b43_phy_read(dev, B43_PHY_DACCTL);
402 sav->phy_cck_14 = b43_phy_read(dev, B43_PHY_CCK(0x14));
403 sav->phy_hpwr_tssictl = b43_phy_read(dev, B43_PHY_HPWR_TSSICTL);
404
405 b43_phy_write(dev, B43_PHY_HPWR_TSSICTL,
406 b43_phy_read(dev, B43_PHY_HPWR_TSSICTL)
407 | 0x100);
408 b43_phy_write(dev, B43_PHY_EXTG(0x01),
409 b43_phy_read(dev, B43_PHY_EXTG(0x01))
410 | 0x40);
411 b43_phy_write(dev, B43_PHY_DACCTL,
412 b43_phy_read(dev, B43_PHY_DACCTL)
413 | 0x40);
414 b43_phy_write(dev, B43_PHY_CCK(0x14),
415 b43_phy_read(dev, B43_PHY_CCK(0x14))
416 | 0x200);
417 }
418 if (phy->type == B43_PHYTYPE_B &&
419 phy->radio_ver == 0x2050 && phy->radio_rev < 6) {
420 b43_phy_write(dev, B43_PHY_CCK(0x16), 0x410);
421 b43_phy_write(dev, B43_PHY_CCK(0x17), 0x820);
422 }
423 if (phy->rev >= 2) {
424 sav->phy_analogover = b43_phy_read(dev, B43_PHY_ANALOGOVER);
425 sav->phy_analogoverval =
426 b43_phy_read(dev, B43_PHY_ANALOGOVERVAL);
427 sav->phy_rfover = b43_phy_read(dev, B43_PHY_RFOVER);
428 sav->phy_rfoverval = b43_phy_read(dev, B43_PHY_RFOVERVAL);
429 sav->phy_classctl = b43_phy_read(dev, B43_PHY_CLASSCTL);
430 sav->phy_cck_3E = b43_phy_read(dev, B43_PHY_CCK(0x3E));
431 sav->phy_crs0 = b43_phy_read(dev, B43_PHY_CRS0);
432
433 b43_phy_write(dev, B43_PHY_CLASSCTL,
434 b43_phy_read(dev, B43_PHY_CLASSCTL)
435 & 0xFFFC);
436 b43_phy_write(dev, B43_PHY_CRS0, b43_phy_read(dev, B43_PHY_CRS0)
437 & 0x7FFF);
438 b43_phy_write(dev, B43_PHY_ANALOGOVER,
439 b43_phy_read(dev, B43_PHY_ANALOGOVER)
440 | 0x0003);
441 b43_phy_write(dev, B43_PHY_ANALOGOVERVAL,
442 b43_phy_read(dev, B43_PHY_ANALOGOVERVAL)
443 & 0xFFFC);
444 if (phy->type == B43_PHYTYPE_G) {
445 if ((phy->rev >= 7) &&
446 (sprom->boardflags_lo & B43_BFL_EXTLNA)) {
447 b43_phy_write(dev, B43_PHY_RFOVER, 0x933);
448 } else {
449 b43_phy_write(dev, B43_PHY_RFOVER, 0x133);
450 }
451 } else {
452 b43_phy_write(dev, B43_PHY_RFOVER, 0);
453 }
454 b43_phy_write(dev, B43_PHY_CCK(0x3E), 0);
455 }
456 sav->reg_3F4 = b43_read16(dev, 0x3F4);
457 sav->reg_3E2 = b43_read16(dev, 0x3E2);
458 sav->radio_43 = b43_radio_read16(dev, 0x43);
459 sav->radio_7A = b43_radio_read16(dev, 0x7A);
460 sav->phy_pgactl = b43_phy_read(dev, B43_PHY_PGACTL);
461 sav->phy_cck_2A = b43_phy_read(dev, B43_PHY_CCK(0x2A));
462 sav->phy_syncctl = b43_phy_read(dev, B43_PHY_SYNCCTL);
463 sav->phy_dacctl = b43_phy_read(dev, B43_PHY_DACCTL);
464
465 if (!has_tx_magnification(phy)) {
466 sav->radio_52 = b43_radio_read16(dev, 0x52);
467 sav->radio_52 &= 0x00F0;
468 }
469 if (phy->type == B43_PHYTYPE_B) {
470 sav->phy_cck_30 = b43_phy_read(dev, B43_PHY_CCK(0x30));
471 sav->phy_cck_06 = b43_phy_read(dev, B43_PHY_CCK(0x06));
472 b43_phy_write(dev, B43_PHY_CCK(0x30), 0x00FF);
473 b43_phy_write(dev, B43_PHY_CCK(0x06), 0x3F3F);
474 } else {
475 b43_write16(dev, 0x3E2, b43_read16(dev, 0x3E2)
476 | 0x8000);
477 }
478 b43_write16(dev, 0x3F4, b43_read16(dev, 0x3F4)
479 & 0xF000);
480
481 tmp =
482 (phy->type == B43_PHYTYPE_G) ? B43_PHY_LO_MASK : B43_PHY_CCK(0x2E);
483 b43_phy_write(dev, tmp, 0x007F);
484
485 tmp = sav->phy_syncctl;
486 b43_phy_write(dev, B43_PHY_SYNCCTL, tmp & 0xFF7F);
487 tmp = sav->radio_7A;
488 b43_radio_write16(dev, 0x007A, tmp & 0xFFF0);
489
490 b43_phy_write(dev, B43_PHY_CCK(0x2A), 0x8A3);
491 if (phy->type == B43_PHYTYPE_G ||
492 (phy->type == B43_PHYTYPE_B &&
493 phy->radio_ver == 0x2050 && phy->radio_rev >= 6)) {
494 b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x1003);
495 } else
496 b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x0802);
497 if (phy->rev >= 2)
498 b43_dummy_transmission(dev);
499 b43_radio_selectchannel(dev, 6, 0);
500 b43_radio_read16(dev, 0x51); /* dummy read */
501 if (phy->type == B43_PHYTYPE_G)
502 b43_phy_write(dev, B43_PHY_CCK(0x2F), 0);
503
504 /* Re-measure the txctl values, if needed. */
505 if (time_before(lo->txctl_measured_time,
506 jiffies - B43_LO_TXCTL_EXPIRE))
507 lo_measure_txctl_values(dev);
508
509 if (phy->type == B43_PHYTYPE_G && phy->rev >= 3) {
510 b43_phy_write(dev, B43_PHY_LO_MASK, 0xC078);
511 } else {
512 if (phy->type == B43_PHYTYPE_B)
513 b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078);
514 else
515 b43_phy_write(dev, B43_PHY_LO_MASK, 0x8078);
516 }
517}
518
519static void lo_measure_restore(struct b43_wldev *dev,
520 struct lo_g_saved_values *sav)
521{
522 struct b43_phy *phy = &dev->phy;
523 u16 tmp;
524
525 if (phy->rev >= 2) {
526 b43_phy_write(dev, B43_PHY_PGACTL, 0xE300);
527 tmp = (phy->pga_gain << 8);
528 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA0);
529 udelay(5);
530 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA2);
531 udelay(2);
532 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA3);
533 } else {
534 tmp = (phy->pga_gain | 0xEFA0);
535 b43_phy_write(dev, B43_PHY_PGACTL, tmp);
536 }
537 if (phy->type == B43_PHYTYPE_G) {
538 if (phy->rev >= 3)
539 b43_phy_write(dev, B43_PHY_CCK(0x2E), 0xC078);
540 else
541 b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078);
542 if (phy->rev >= 2)
543 b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0202);
544 else
545 b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0101);
546 }
547 b43_write16(dev, 0x3F4, sav->reg_3F4);
548 b43_phy_write(dev, B43_PHY_PGACTL, sav->phy_pgactl);
549 b43_phy_write(dev, B43_PHY_CCK(0x2A), sav->phy_cck_2A);
550 b43_phy_write(dev, B43_PHY_SYNCCTL, sav->phy_syncctl);
551 b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl);
552 b43_radio_write16(dev, 0x43, sav->radio_43);
553 b43_radio_write16(dev, 0x7A, sav->radio_7A);
554 if (!has_tx_magnification(phy)) {
555 tmp = sav->radio_52;
556 b43_radio_write16(dev, 0x52, (b43_radio_read16(dev, 0x52)
557 & 0xFF0F) | tmp);
558 }
559 b43_write16(dev, 0x3E2, sav->reg_3E2);
560 if (phy->type == B43_PHYTYPE_B &&
561 phy->radio_ver == 0x2050 && phy->radio_rev <= 5) {
562 b43_phy_write(dev, B43_PHY_CCK(0x30), sav->phy_cck_30);
563 b43_phy_write(dev, B43_PHY_CCK(0x06), sav->phy_cck_06);
564 }
565 if (phy->rev >= 2) {
566 b43_phy_write(dev, B43_PHY_ANALOGOVER, sav->phy_analogover);
567 b43_phy_write(dev, B43_PHY_ANALOGOVERVAL,
568 sav->phy_analogoverval);
569 b43_phy_write(dev, B43_PHY_CLASSCTL, sav->phy_classctl);
570 b43_phy_write(dev, B43_PHY_RFOVER, sav->phy_rfover);
571 b43_phy_write(dev, B43_PHY_RFOVERVAL, sav->phy_rfoverval);
572 b43_phy_write(dev, B43_PHY_CCK(0x3E), sav->phy_cck_3E);
573 b43_phy_write(dev, B43_PHY_CRS0, sav->phy_crs0);
574 }
575 if (b43_has_hardware_pctl(phy)) {
576 tmp = (sav->phy_lo_mask & 0xBFFF);
577 b43_phy_write(dev, B43_PHY_LO_MASK, tmp);
578 b43_phy_write(dev, B43_PHY_EXTG(0x01), sav->phy_extg_01);
579 b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl_hwpctl);
580 b43_phy_write(dev, B43_PHY_CCK(0x14), sav->phy_cck_14);
581 b43_phy_write(dev, B43_PHY_HPWR_TSSICTL, sav->phy_hpwr_tssictl);
582 }
583 b43_radio_selectchannel(dev, sav->old_channel, 1);
584}
585
586struct b43_lo_g_statemachine {
587 int current_state;
588 int nr_measured;
589 int state_val_multiplier;
590 u16 lowest_feedth;
591 struct b43_loctl min_loctl;
592};
593
594/* Loop over each possible value in this state. */
595static int lo_probe_possible_loctls(struct b43_wldev *dev,
596 struct b43_loctl *probe_loctl,
597 struct b43_lo_g_statemachine *d)
598{
599 struct b43_phy *phy = &dev->phy;
600 struct b43_loctl test_loctl;
601 struct b43_loctl orig_loctl;
602 struct b43_loctl prev_loctl = {
603 .i = -100,
604 .q = -100,
605 };
606 int i;
607 int begin, end;
608 int found_lower = 0;
609 u16 feedth;
610
611 static const struct b43_loctl modifiers[] = {
612 {.i = 1,.q = 1,},
613 {.i = 1,.q = 0,},
614 {.i = 1,.q = -1,},
615 {.i = 0,.q = -1,},
616 {.i = -1,.q = -1,},
617 {.i = -1,.q = 0,},
618 {.i = -1,.q = 1,},
619 {.i = 0,.q = 1,},
620 };
621
622 if (d->current_state == 0) {
623 begin = 1;
624 end = 8;
625 } else if (d->current_state % 2 == 0) {
626 begin = d->current_state - 1;
627 end = d->current_state + 1;
628 } else {
629 begin = d->current_state - 2;
630 end = d->current_state + 2;
631 }
632 if (begin < 1)
633 begin += 8;
634 if (end > 8)
635 end -= 8;
636
637 memcpy(&orig_loctl, probe_loctl, sizeof(struct b43_loctl));
638 i = begin;
639 d->current_state = i;
640 while (1) {
641 B43_WARN_ON(!(i >= 1 && i <= 8));
642 memcpy(&test_loctl, &orig_loctl, sizeof(struct b43_loctl));
643 test_loctl.i += modifiers[i - 1].i * d->state_val_multiplier;
644 test_loctl.q += modifiers[i - 1].q * d->state_val_multiplier;
645 if ((test_loctl.i != prev_loctl.i ||
646 test_loctl.q != prev_loctl.q) &&
647 (abs(test_loctl.i) <= 16 && abs(test_loctl.q) <= 16)) {
648 b43_lo_write(dev, &test_loctl);
649 feedth = lo_measure_feedthrough(dev, phy->lna_gain,
650 phy->pga_gain,
651 phy->trsw_rx_gain);
652 if (feedth < d->lowest_feedth) {
653 memcpy(probe_loctl, &test_loctl,
654 sizeof(struct b43_loctl));
655 found_lower = 1;
656 d->lowest_feedth = feedth;
657 if ((d->nr_measured < 2) &&
658 !has_loopback_gain(phy))
659 break;
660 }
661 }
662 memcpy(&prev_loctl, &test_loctl, sizeof(prev_loctl));
663 if (i == end)
664 break;
665 if (i == 8)
666 i = 1;
667 else
668 i++;
669 d->current_state = i;
670 }
671
672 return found_lower;
673}
674
675static void lo_probe_loctls_statemachine(struct b43_wldev *dev,
676 struct b43_loctl *loctl,
677 int *max_rx_gain)
678{
679 struct b43_phy *phy = &dev->phy;
680 struct b43_lo_g_statemachine d;
681 u16 feedth;
682 int found_lower;
683 struct b43_loctl probe_loctl;
684 int max_repeat = 1, repeat_cnt = 0;
685
686 d.nr_measured = 0;
687 d.state_val_multiplier = 1;
688 if (has_loopback_gain(phy))
689 d.state_val_multiplier = 3;
690
691 memcpy(&d.min_loctl, loctl, sizeof(struct b43_loctl));
692 if (has_loopback_gain(phy))
693 max_repeat = 4;
694 do {
695 b43_lo_write(dev, &d.min_loctl);
696 feedth = lo_measure_feedthrough(dev, phy->lna_gain,
697 phy->pga_gain,
698 phy->trsw_rx_gain);
699 if (feedth < 0x258) {
700 if (feedth >= 0x12C)
701 *max_rx_gain += 6;
702 else
703 *max_rx_gain += 3;
704 feedth = lo_measure_feedthrough(dev, phy->lna_gain,
705 phy->pga_gain,
706 phy->trsw_rx_gain);
707 }
708 d.lowest_feedth = feedth;
709
710 d.current_state = 0;
711 do {
712 B43_WARN_ON(!
713 (d.current_state >= 0
714 && d.current_state <= 8));
715 memcpy(&probe_loctl, &d.min_loctl,
716 sizeof(struct b43_loctl));
717 found_lower =
718 lo_probe_possible_loctls(dev, &probe_loctl, &d);
719 if (!found_lower)
720 break;
721 if ((probe_loctl.i == d.min_loctl.i) &&
722 (probe_loctl.q == d.min_loctl.q))
723 break;
724 memcpy(&d.min_loctl, &probe_loctl,
725 sizeof(struct b43_loctl));
726 d.nr_measured++;
727 } while (d.nr_measured < 24);
728 memcpy(loctl, &d.min_loctl, sizeof(struct b43_loctl));
729
730 if (has_loopback_gain(phy)) {
731 if (d.lowest_feedth > 0x1194)
732 *max_rx_gain -= 6;
733 else if (d.lowest_feedth < 0x5DC)
734 *max_rx_gain += 3;
735 if (repeat_cnt == 0) {
736 if (d.lowest_feedth <= 0x5DC) {
737 d.state_val_multiplier = 1;
738 repeat_cnt++;
739 } else
740 d.state_val_multiplier = 2;
741 } else if (repeat_cnt == 2)
742 d.state_val_multiplier = 1;
743 }
744 lo_measure_gain_values(dev, *max_rx_gain,
745 has_loopback_gain(phy));
746 } while (++repeat_cnt < max_repeat);
747}
748
749static
750struct b43_lo_calib * b43_calibrate_lo_setting(struct b43_wldev *dev,
751 const struct b43_bbatt *bbatt,
752 const struct b43_rfatt *rfatt)
753{
754 struct b43_phy *phy = &dev->phy;
755 struct b43_loctl loctl = {
756 .i = 0,
757 .q = 0,
758 };
759 int max_rx_gain;
760 struct b43_lo_calib *cal;
761 struct lo_g_saved_values uninitialized_var(saved_regs);
762 /* Values from the "TXCTL Register and Value Table" */
763 u16 txctl_reg;
764 u16 txctl_value;
765 u16 pad_mix_gain;
766
767 saved_regs.old_channel = phy->channel;
768 b43_mac_suspend(dev);
769 lo_measure_setup(dev, &saved_regs);
770
771 txctl_reg = lo_txctl_register_table(dev, &txctl_value, &pad_mix_gain);
772
773 b43_radio_write16(dev, 0x43,
774 (b43_radio_read16(dev, 0x43) & 0xFFF0)
775 | rfatt->att);
776 b43_radio_write16(dev, txctl_reg,
777 (b43_radio_read16(dev, txctl_reg) & ~txctl_value)
778 | (rfatt->with_padmix) ? txctl_value : 0);
779
780 max_rx_gain = rfatt->att * 2;
781 max_rx_gain += bbatt->att / 2;
782 if (rfatt->with_padmix)
783 max_rx_gain -= pad_mix_gain;
784 if (has_loopback_gain(phy))
785 max_rx_gain += phy->max_lb_gain;
786 lo_measure_gain_values(dev, max_rx_gain,
787 has_loopback_gain(phy));
788
789 b43_phy_set_baseband_attenuation(dev, bbatt->att);
790 lo_probe_loctls_statemachine(dev, &loctl, &max_rx_gain);
791
792 lo_measure_restore(dev, &saved_regs);
793 b43_mac_enable(dev);
794
795 if (b43_debug(dev, B43_DBG_LO)) {
796 b43dbg(dev->wl, "LO: Calibrated for BB(%u), RF(%u,%u) "
797 "=> I=%d Q=%d\n",
798 bbatt->att, rfatt->att, rfatt->with_padmix,
799 loctl.i, loctl.q);
800 }
801
802 cal = kmalloc(sizeof(*cal), GFP_KERNEL);
803 if (!cal) {
804 b43warn(dev->wl, "LO calib: out of memory\n");
805 return NULL;
806 }
807 memcpy(&cal->bbatt, bbatt, sizeof(*bbatt));
808 memcpy(&cal->rfatt, rfatt, sizeof(*rfatt));
809 memcpy(&cal->ctl, &loctl, sizeof(loctl));
810 cal->calib_time = jiffies;
811 INIT_LIST_HEAD(&cal->list);
812
813 return cal;
814}
815
816/* Get a calibrated LO setting for the given attenuation values.
817 * Might return a NULL pointer under OOM! */
818static
819struct b43_lo_calib * b43_get_calib_lo_settings(struct b43_wldev *dev,
820 const struct b43_bbatt *bbatt,
821 const struct b43_rfatt *rfatt)
822{
823 struct b43_txpower_lo_control *lo = dev->phy.lo_control;
824 struct b43_lo_calib *c;
825
826 c = b43_find_lo_calib(lo, bbatt, rfatt);
827 if (c)
828 return c;
829 /* Not in the list of calibrated LO settings.
830 * Calibrate it now. */
831 c = b43_calibrate_lo_setting(dev, bbatt, rfatt);
832 if (!c)
833 return NULL;
834 list_add(&c->list, &lo->calib_list);
835
836 return c;
837}
838
839void b43_gphy_dc_lt_init(struct b43_wldev *dev, bool update_all)
840{
841 struct b43_phy *phy = &dev->phy;
842 struct b43_txpower_lo_control *lo = phy->lo_control;
843 int i;
844 int rf_offset, bb_offset;
845 const struct b43_rfatt *rfatt;
846 const struct b43_bbatt *bbatt;
847 u64 power_vector;
848 bool table_changed = 0;
849
850 BUILD_BUG_ON(B43_DC_LT_SIZE != 32);
851 B43_WARN_ON(lo->rfatt_list.len * lo->bbatt_list.len > 64);
852
853 power_vector = lo->power_vector;
854 if (!update_all && !power_vector)
855 return; /* Nothing to do. */
856
857 /* Suspend the MAC now to avoid continuous suspend/enable
858 * cycles in the loop. */
859 b43_mac_suspend(dev);
860
861 for (i = 0; i < B43_DC_LT_SIZE * 2; i++) {
862 struct b43_lo_calib *cal;
863 int idx;
864 u16 val;
865
866 if (!update_all && !(power_vector & (((u64)1ULL) << i)))
867 continue;
868 /* Update the table entry for this power_vector bit.
869 * The table rows are RFatt entries and columns are BBatt. */
870 bb_offset = i / lo->rfatt_list.len;
871 rf_offset = i % lo->rfatt_list.len;
872 bbatt = &(lo->bbatt_list.list[bb_offset]);
873 rfatt = &(lo->rfatt_list.list[rf_offset]);
874
875 cal = b43_calibrate_lo_setting(dev, bbatt, rfatt);
876 if (!cal) {
877 b43warn(dev->wl, "LO: Could not "
878 "calibrate DC table entry\n");
879 continue;
880 }
881 /*FIXME: Is Q really in the low nibble? */
882 val = (u8)(cal->ctl.q);
883 val |= ((u8)(cal->ctl.i)) << 4;
884 kfree(cal);
885
886 /* Get the index into the hardware DC LT. */
887 idx = i / 2;
888 /* Change the table in memory. */
889 if (i % 2) {
890 /* Change the high byte. */
891 lo->dc_lt[idx] = (lo->dc_lt[idx] & 0x00FF)
892 | ((val & 0x00FF) << 8);
893 } else {
894 /* Change the low byte. */
895 lo->dc_lt[idx] = (lo->dc_lt[idx] & 0xFF00)
896 | (val & 0x00FF);
897 }
898 table_changed = 1;
899 }
900 if (table_changed) {
901 /* The table changed in memory. Update the hardware table. */
902 for (i = 0; i < B43_DC_LT_SIZE; i++)
903 b43_phy_write(dev, 0x3A0 + i, lo->dc_lt[i]);
904 }
905 b43_mac_enable(dev);
906}
907
908/* Fixup the RF attenuation value for the case where we are
909 * using the PAD mixer. */
910static inline void b43_lo_fixup_rfatt(struct b43_rfatt *rf)
911{
912 if (!rf->with_padmix)
913 return;
914 if ((rf->att != 1) && (rf->att != 2) && (rf->att != 3))
915 rf->att = 4;
916}
917
918void b43_lo_g_adjust(struct b43_wldev *dev)
919{
920 struct b43_phy *phy = &dev->phy;
921 struct b43_lo_calib *cal;
922 struct b43_rfatt rf;
923
924 memcpy(&rf, &phy->rfatt, sizeof(rf));
925 b43_lo_fixup_rfatt(&rf);
926
927 cal = b43_get_calib_lo_settings(dev, &phy->bbatt, &rf);
928 if (!cal)
929 return;
930 b43_lo_write(dev, &cal->ctl);
931}
932
933void b43_lo_g_adjust_to(struct b43_wldev *dev,
934 u16 rfatt, u16 bbatt, u16 tx_control)
935{
936 struct b43_rfatt rf;
937 struct b43_bbatt bb;
938 struct b43_lo_calib *cal;
939
940 memset(&rf, 0, sizeof(rf));
941 memset(&bb, 0, sizeof(bb));
942 rf.att = rfatt;
943 bb.att = bbatt;
944 b43_lo_fixup_rfatt(&rf);
945 cal = b43_get_calib_lo_settings(dev, &bb, &rf);
946 if (!cal)
947 return;
948 b43_lo_write(dev, &cal->ctl);
949}
950
951/* Periodic LO maintanance work */
952void b43_lo_g_maintanance_work(struct b43_wldev *dev)
953{
954 struct b43_phy *phy = &dev->phy;
955 struct b43_txpower_lo_control *lo = phy->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(phy);
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, &phy->bbatt) &&
987 b43_compare_rfatt(&cal->rfatt, &phy->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, &phy->bbatt, &phy->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
1014void b43_lo_g_cleanup(struct b43_wldev *dev)
1015{
1016 struct b43_txpower_lo_control *lo = dev->phy.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 */
1028void b43_lo_g_init(struct b43_wldev *dev)
1029{
1030 struct b43_phy *phy = &dev->phy;
1031
1032 if (b43_has_hardware_pctl(phy)) {
1033 lo_read_power_vector(dev);
1034 b43_gphy_dc_lt_init(dev, 1);
1035 }
1036}