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_g.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_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_maskset(dev, 0x43, 0xFFF0, radio_pctl_reg);
229 b43_gphy_set_baseband_attenuation(dev, 2);
230
231 reg = lo_txctl_register_table(dev, &mask, NULL);
232 mask = ~mask;
233 b43_radio_mask(dev, reg, mask);
234
235 if (has_tx_magnification(phy)) {
236 int i, j;
237 int feedthrough;
238 int min_feedth = 0xFFFF;
239 u8 tx_magn, tx_bias;
240
241 for (i = 0; i < ARRAY_SIZE(tx_magn_values); i++) {
242 tx_magn = tx_magn_values[i];
243 b43_radio_maskset(dev, 0x52, 0xFF0F, tx_magn);
244 for (j = 0; j < ARRAY_SIZE(tx_bias_values); j++) {
245 tx_bias = tx_bias_values[j];
246 b43_radio_maskset(dev, 0x52, 0xFFF0, tx_bias);
247 feedthrough =
248 lo_measure_feedthrough(dev, 0, pga,
249 trsw_rx);
250 if (feedthrough < min_feedth) {
251 lo->tx_bias = tx_bias;
252 lo->tx_magn = tx_magn;
253 min_feedth = feedthrough;
254 }
255 if (lo->tx_bias == 0)
256 break;
257 }
258 b43_radio_write16(dev, 0x52,
259 (b43_radio_read16(dev, 0x52)
260 & 0xFF00) | lo->tx_bias | lo->
261 tx_magn);
262 }
263 } else {
264 lo->tx_magn = 0;
265 lo->tx_bias = 0;
266 b43_radio_mask(dev, 0x52, 0xFFF0); /* TX bias == 0 */
267 }
268 lo->txctl_measured_time = jiffies;
269}
270
271static void lo_read_power_vector(struct b43_wldev *dev)
272{
273 struct b43_phy *phy = &dev->phy;
274 struct b43_phy_g *gphy = phy->g;
275 struct b43_txpower_lo_control *lo = gphy->lo_control;
276 int i;
277 u64 tmp;
278 u64 power_vector = 0;
279
280 for (i = 0; i < 8; i += 2) {
281 tmp = b43_shm_read16(dev, B43_SHM_SHARED, 0x310 + i);
282 power_vector |= (tmp << (i * 8));
283 /* Clear the vector on the device. */
284 b43_shm_write16(dev, B43_SHM_SHARED, 0x310 + i, 0);
285 }
286 if (power_vector)
287 lo->power_vector = power_vector;
288 lo->pwr_vec_read_time = jiffies;
289}
290
291/* 802.11/LO/GPHY/MeasuringGains */
292static void lo_measure_gain_values(struct b43_wldev *dev,
293 s16 max_rx_gain, int use_trsw_rx)
294{
295 struct b43_phy *phy = &dev->phy;
296 struct b43_phy_g *gphy = phy->g;
297 u16 tmp;
298
299 if (max_rx_gain < 0)
300 max_rx_gain = 0;
301
302 if (has_loopback_gain(phy)) {
303 int trsw_rx = 0;
304 int trsw_rx_gain;
305
306 if (use_trsw_rx) {
307 trsw_rx_gain = gphy->trsw_rx_gain / 2;
308 if (max_rx_gain >= trsw_rx_gain) {
309 trsw_rx_gain = max_rx_gain - trsw_rx_gain;
310 trsw_rx = 0x20;
311 }
312 } else
313 trsw_rx_gain = max_rx_gain;
314 if (trsw_rx_gain < 9) {
315 gphy->lna_lod_gain = 0;
316 } else {
317 gphy->lna_lod_gain = 1;
318 trsw_rx_gain -= 8;
319 }
320 trsw_rx_gain = clamp_val(trsw_rx_gain, 0, 0x2D);
321 gphy->pga_gain = trsw_rx_gain / 3;
322 if (gphy->pga_gain >= 5) {
323 gphy->pga_gain -= 5;
324 gphy->lna_gain = 2;
325 } else
326 gphy->lna_gain = 0;
327 } else {
328 gphy->lna_gain = 0;
329 gphy->trsw_rx_gain = 0x20;
330 if (max_rx_gain >= 0x14) {
331 gphy->lna_lod_gain = 1;
332 gphy->pga_gain = 2;
333 } else if (max_rx_gain >= 0x12) {
334 gphy->lna_lod_gain = 1;
335 gphy->pga_gain = 1;
336 } else if (max_rx_gain >= 0xF) {
337 gphy->lna_lod_gain = 1;
338 gphy->pga_gain = 0;
339 } else {
340 gphy->lna_lod_gain = 0;
341 gphy->pga_gain = 0;
342 }
343 }
344
345 tmp = b43_radio_read16(dev, 0x7A);
346 if (gphy->lna_lod_gain == 0)
347 tmp &= ~0x0008;
348 else
349 tmp |= 0x0008;
350 b43_radio_write16(dev, 0x7A, tmp);
351}
352
353struct lo_g_saved_values {
354 u8 old_channel;
355
356 /* Core registers */
357 u16 reg_3F4;
358 u16 reg_3E2;
359
360 /* PHY registers */
361 u16 phy_lo_mask;
362 u16 phy_extg_01;
363 u16 phy_dacctl_hwpctl;
364 u16 phy_dacctl;
365 u16 phy_cck_14;
366 u16 phy_hpwr_tssictl;
367 u16 phy_analogover;
368 u16 phy_analogoverval;
369 u16 phy_rfover;
370 u16 phy_rfoverval;
371 u16 phy_classctl;
372 u16 phy_cck_3E;
373 u16 phy_crs0;
374 u16 phy_pgactl;
375 u16 phy_cck_2A;
376 u16 phy_syncctl;
377 u16 phy_cck_30;
378 u16 phy_cck_06;
379
380 /* Radio registers */
381 u16 radio_43;
382 u16 radio_7A;
383 u16 radio_52;
384};
385
386static void lo_measure_setup(struct b43_wldev *dev,
387 struct lo_g_saved_values *sav)
388{
389 struct ssb_sprom *sprom = &dev->dev->bus->sprom;
390 struct b43_phy *phy = &dev->phy;
391 struct b43_phy_g *gphy = phy->g;
392 struct b43_txpower_lo_control *lo = gphy->lo_control;
393 u16 tmp;
394
395 if (b43_has_hardware_pctl(dev)) {
396 sav->phy_lo_mask = b43_phy_read(dev, B43_PHY_LO_MASK);
397 sav->phy_extg_01 = b43_phy_read(dev, B43_PHY_EXTG(0x01));
398 sav->phy_dacctl_hwpctl = b43_phy_read(dev, B43_PHY_DACCTL);
399 sav->phy_cck_14 = b43_phy_read(dev, B43_PHY_CCK(0x14));
400 sav->phy_hpwr_tssictl = b43_phy_read(dev, B43_PHY_HPWR_TSSICTL);
401
402 b43_phy_set(dev, B43_PHY_HPWR_TSSICTL, 0x100);
403 b43_phy_set(dev, B43_PHY_EXTG(0x01), 0x40);
404 b43_phy_set(dev, B43_PHY_DACCTL, 0x40);
405 b43_phy_set(dev, B43_PHY_CCK(0x14), 0x200);
406 }
407 if (phy->type == B43_PHYTYPE_B &&
408 phy->radio_ver == 0x2050 && phy->radio_rev < 6) {
409 b43_phy_write(dev, B43_PHY_CCK(0x16), 0x410);
410 b43_phy_write(dev, B43_PHY_CCK(0x17), 0x820);
411 }
412 if (phy->rev >= 2) {
413 sav->phy_analogover = b43_phy_read(dev, B43_PHY_ANALOGOVER);
414 sav->phy_analogoverval =
415 b43_phy_read(dev, B43_PHY_ANALOGOVERVAL);
416 sav->phy_rfover = b43_phy_read(dev, B43_PHY_RFOVER);
417 sav->phy_rfoverval = b43_phy_read(dev, B43_PHY_RFOVERVAL);
418 sav->phy_classctl = b43_phy_read(dev, B43_PHY_CLASSCTL);
419 sav->phy_cck_3E = b43_phy_read(dev, B43_PHY_CCK(0x3E));
420 sav->phy_crs0 = b43_phy_read(dev, B43_PHY_CRS0);
421
422 b43_phy_mask(dev, B43_PHY_CLASSCTL, 0xFFFC);
423 b43_phy_mask(dev, B43_PHY_CRS0, 0x7FFF);
424 b43_phy_set(dev, B43_PHY_ANALOGOVER, 0x0003);
425 b43_phy_mask(dev, B43_PHY_ANALOGOVERVAL, 0xFFFC);
426 if (phy->type == B43_PHYTYPE_G) {
427 if ((phy->rev >= 7) &&
428 (sprom->boardflags_lo & B43_BFL_EXTLNA)) {
429 b43_phy_write(dev, B43_PHY_RFOVER, 0x933);
430 } else {
431 b43_phy_write(dev, B43_PHY_RFOVER, 0x133);
432 }
433 } else {
434 b43_phy_write(dev, B43_PHY_RFOVER, 0);
435 }
436 b43_phy_write(dev, B43_PHY_CCK(0x3E), 0);
437 }
438 sav->reg_3F4 = b43_read16(dev, 0x3F4);
439 sav->reg_3E2 = b43_read16(dev, 0x3E2);
440 sav->radio_43 = b43_radio_read16(dev, 0x43);
441 sav->radio_7A = b43_radio_read16(dev, 0x7A);
442 sav->phy_pgactl = b43_phy_read(dev, B43_PHY_PGACTL);
443 sav->phy_cck_2A = b43_phy_read(dev, B43_PHY_CCK(0x2A));
444 sav->phy_syncctl = b43_phy_read(dev, B43_PHY_SYNCCTL);
445 sav->phy_dacctl = b43_phy_read(dev, B43_PHY_DACCTL);
446
447 if (!has_tx_magnification(phy)) {
448 sav->radio_52 = b43_radio_read16(dev, 0x52);
449 sav->radio_52 &= 0x00F0;
450 }
451 if (phy->type == B43_PHYTYPE_B) {
452 sav->phy_cck_30 = b43_phy_read(dev, B43_PHY_CCK(0x30));
453 sav->phy_cck_06 = b43_phy_read(dev, B43_PHY_CCK(0x06));
454 b43_phy_write(dev, B43_PHY_CCK(0x30), 0x00FF);
455 b43_phy_write(dev, B43_PHY_CCK(0x06), 0x3F3F);
456 } else {
457 b43_write16(dev, 0x3E2, b43_read16(dev, 0x3E2)
458 | 0x8000);
459 }
460 b43_write16(dev, 0x3F4, b43_read16(dev, 0x3F4)
461 & 0xF000);
462
463 tmp =
464 (phy->type == B43_PHYTYPE_G) ? B43_PHY_LO_MASK : B43_PHY_CCK(0x2E);
465 b43_phy_write(dev, tmp, 0x007F);
466
467 tmp = sav->phy_syncctl;
468 b43_phy_write(dev, B43_PHY_SYNCCTL, tmp & 0xFF7F);
469 tmp = sav->radio_7A;
470 b43_radio_write16(dev, 0x007A, tmp & 0xFFF0);
471
472 b43_phy_write(dev, B43_PHY_CCK(0x2A), 0x8A3);
473 if (phy->type == B43_PHYTYPE_G ||
474 (phy->type == B43_PHYTYPE_B &&
475 phy->radio_ver == 0x2050 && phy->radio_rev >= 6)) {
476 b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x1003);
477 } else
478 b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x0802);
479 if (phy->rev >= 2)
480 b43_dummy_transmission(dev);
481 b43_gphy_channel_switch(dev, 6, 0);
482 b43_radio_read16(dev, 0x51); /* dummy read */
483 if (phy->type == B43_PHYTYPE_G)
484 b43_phy_write(dev, B43_PHY_CCK(0x2F), 0);
485
486 /* Re-measure the txctl values, if needed. */
487 if (time_before(lo->txctl_measured_time,
488 jiffies - B43_LO_TXCTL_EXPIRE))
489 lo_measure_txctl_values(dev);
490
491 if (phy->type == B43_PHYTYPE_G && phy->rev >= 3) {
492 b43_phy_write(dev, B43_PHY_LO_MASK, 0xC078);
493 } else {
494 if (phy->type == B43_PHYTYPE_B)
495 b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078);
496 else
497 b43_phy_write(dev, B43_PHY_LO_MASK, 0x8078);
498 }
499}
500
501static void lo_measure_restore(struct b43_wldev *dev,
502 struct lo_g_saved_values *sav)
503{
504 struct b43_phy *phy = &dev->phy;
505 struct b43_phy_g *gphy = phy->g;
506 u16 tmp;
507
508 if (phy->rev >= 2) {
509 b43_phy_write(dev, B43_PHY_PGACTL, 0xE300);
510 tmp = (gphy->pga_gain << 8);
511 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA0);
512 udelay(5);
513 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA2);
514 udelay(2);
515 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA3);
516 } else {
517 tmp = (gphy->pga_gain | 0xEFA0);
518 b43_phy_write(dev, B43_PHY_PGACTL, tmp);
519 }
520 if (phy->type == B43_PHYTYPE_G) {
521 if (phy->rev >= 3)
522 b43_phy_write(dev, B43_PHY_CCK(0x2E), 0xC078);
523 else
524 b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078);
525 if (phy->rev >= 2)
526 b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0202);
527 else
528 b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0101);
529 }
530 b43_write16(dev, 0x3F4, sav->reg_3F4);
531 b43_phy_write(dev, B43_PHY_PGACTL, sav->phy_pgactl);
532 b43_phy_write(dev, B43_PHY_CCK(0x2A), sav->phy_cck_2A);
533 b43_phy_write(dev, B43_PHY_SYNCCTL, sav->phy_syncctl);
534 b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl);
535 b43_radio_write16(dev, 0x43, sav->radio_43);
536 b43_radio_write16(dev, 0x7A, sav->radio_7A);
537 if (!has_tx_magnification(phy)) {
538 tmp = sav->radio_52;
539 b43_radio_maskset(dev, 0x52, 0xFF0F, tmp);
540 }
541 b43_write16(dev, 0x3E2, sav->reg_3E2);
542 if (phy->type == B43_PHYTYPE_B &&
543 phy->radio_ver == 0x2050 && phy->radio_rev <= 5) {
544 b43_phy_write(dev, B43_PHY_CCK(0x30), sav->phy_cck_30);
545 b43_phy_write(dev, B43_PHY_CCK(0x06), sav->phy_cck_06);
546 }
547 if (phy->rev >= 2) {
548 b43_phy_write(dev, B43_PHY_ANALOGOVER, sav->phy_analogover);
549 b43_phy_write(dev, B43_PHY_ANALOGOVERVAL,
550 sav->phy_analogoverval);
551 b43_phy_write(dev, B43_PHY_CLASSCTL, sav->phy_classctl);
552 b43_phy_write(dev, B43_PHY_RFOVER, sav->phy_rfover);
553 b43_phy_write(dev, B43_PHY_RFOVERVAL, sav->phy_rfoverval);
554 b43_phy_write(dev, B43_PHY_CCK(0x3E), sav->phy_cck_3E);
555 b43_phy_write(dev, B43_PHY_CRS0, sav->phy_crs0);
556 }
557 if (b43_has_hardware_pctl(dev)) {
558 tmp = (sav->phy_lo_mask & 0xBFFF);
559 b43_phy_write(dev, B43_PHY_LO_MASK, tmp);
560 b43_phy_write(dev, B43_PHY_EXTG(0x01), sav->phy_extg_01);
561 b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl_hwpctl);
562 b43_phy_write(dev, B43_PHY_CCK(0x14), sav->phy_cck_14);
563 b43_phy_write(dev, B43_PHY_HPWR_TSSICTL, sav->phy_hpwr_tssictl);
564 }
565 b43_gphy_channel_switch(dev, sav->old_channel, 1);
566}
567
568struct b43_lo_g_statemachine {
569 int current_state;
570 int nr_measured;
571 int state_val_multiplier;
572 u16 lowest_feedth;
573 struct b43_loctl min_loctl;
574};
575
576/* Loop over each possible value in this state. */
577static int lo_probe_possible_loctls(struct b43_wldev *dev,
578 struct b43_loctl *probe_loctl,
579 struct b43_lo_g_statemachine *d)
580{
581 struct b43_phy *phy = &dev->phy;
582 struct b43_phy_g *gphy = phy->g;
583 struct b43_loctl test_loctl;
584 struct b43_loctl orig_loctl;
585 struct b43_loctl prev_loctl = {
586 .i = -100,
587 .q = -100,
588 };
589 int i;
590 int begin, end;
591 int found_lower = 0;
592 u16 feedth;
593
594 static const struct b43_loctl modifiers[] = {
595 {.i = 1,.q = 1,},
596 {.i = 1,.q = 0,},
597 {.i = 1,.q = -1,},
598 {.i = 0,.q = -1,},
599 {.i = -1,.q = -1,},
600 {.i = -1,.q = 0,},
601 {.i = -1,.q = 1,},
602 {.i = 0,.q = 1,},
603 };
604
605 if (d->current_state == 0) {
606 begin = 1;
607 end = 8;
608 } else if (d->current_state % 2 == 0) {
609 begin = d->current_state - 1;
610 end = d->current_state + 1;
611 } else {
612 begin = d->current_state - 2;
613 end = d->current_state + 2;
614 }
615 if (begin < 1)
616 begin += 8;
617 if (end > 8)
618 end -= 8;
619
620 memcpy(&orig_loctl, probe_loctl, sizeof(struct b43_loctl));
621 i = begin;
622 d->current_state = i;
623 while (1) {
624 B43_WARN_ON(!(i >= 1 && i <= 8));
625 memcpy(&test_loctl, &orig_loctl, sizeof(struct b43_loctl));
626 test_loctl.i += modifiers[i - 1].i * d->state_val_multiplier;
627 test_loctl.q += modifiers[i - 1].q * d->state_val_multiplier;
628 if ((test_loctl.i != prev_loctl.i ||
629 test_loctl.q != prev_loctl.q) &&
630 (abs(test_loctl.i) <= 16 && abs(test_loctl.q) <= 16)) {
631 b43_lo_write(dev, &test_loctl);
632 feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
633 gphy->pga_gain,
634 gphy->trsw_rx_gain);
635 if (feedth < d->lowest_feedth) {
636 memcpy(probe_loctl, &test_loctl,
637 sizeof(struct b43_loctl));
638 found_lower = 1;
639 d->lowest_feedth = feedth;
640 if ((d->nr_measured < 2) &&
641 !has_loopback_gain(phy))
642 break;
643 }
644 }
645 memcpy(&prev_loctl, &test_loctl, sizeof(prev_loctl));
646 if (i == end)
647 break;
648 if (i == 8)
649 i = 1;
650 else
651 i++;
652 d->current_state = i;
653 }
654
655 return found_lower;
656}
657
658static void lo_probe_loctls_statemachine(struct b43_wldev *dev,
659 struct b43_loctl *loctl,
660 int *max_rx_gain)
661{
662 struct b43_phy *phy = &dev->phy;
663 struct b43_phy_g *gphy = phy->g;
664 struct b43_lo_g_statemachine d;
665 u16 feedth;
666 int found_lower;
667 struct b43_loctl probe_loctl;
668 int max_repeat = 1, repeat_cnt = 0;
669
670 d.nr_measured = 0;
671 d.state_val_multiplier = 1;
672 if (has_loopback_gain(phy))
673 d.state_val_multiplier = 3;
674
675 memcpy(&d.min_loctl, loctl, sizeof(struct b43_loctl));
676 if (has_loopback_gain(phy))
677 max_repeat = 4;
678 do {
679 b43_lo_write(dev, &d.min_loctl);
680 feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
681 gphy->pga_gain,
682 gphy->trsw_rx_gain);
683 if (feedth < 0x258) {
684 if (feedth >= 0x12C)
685 *max_rx_gain += 6;
686 else
687 *max_rx_gain += 3;
688 feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
689 gphy->pga_gain,
690 gphy->trsw_rx_gain);
691 }
692 d.lowest_feedth = feedth;
693
694 d.current_state = 0;
695 do {
696 B43_WARN_ON(!
697 (d.current_state >= 0
698 && d.current_state <= 8));
699 memcpy(&probe_loctl, &d.min_loctl,
700 sizeof(struct b43_loctl));
701 found_lower =
702 lo_probe_possible_loctls(dev, &probe_loctl, &d);
703 if (!found_lower)
704 break;
705 if ((probe_loctl.i == d.min_loctl.i) &&
706 (probe_loctl.q == d.min_loctl.q))
707 break;
708 memcpy(&d.min_loctl, &probe_loctl,
709 sizeof(struct b43_loctl));
710 d.nr_measured++;
711 } while (d.nr_measured < 24);
712 memcpy(loctl, &d.min_loctl, sizeof(struct b43_loctl));
713
714 if (has_loopback_gain(phy)) {
715 if (d.lowest_feedth > 0x1194)
716 *max_rx_gain -= 6;
717 else if (d.lowest_feedth < 0x5DC)
718 *max_rx_gain += 3;
719 if (repeat_cnt == 0) {
720 if (d.lowest_feedth <= 0x5DC) {
721 d.state_val_multiplier = 1;
722 repeat_cnt++;
723 } else
724 d.state_val_multiplier = 2;
725 } else if (repeat_cnt == 2)
726 d.state_val_multiplier = 1;
727 }
728 lo_measure_gain_values(dev, *max_rx_gain,
729 has_loopback_gain(phy));
730 } while (++repeat_cnt < max_repeat);
731}
732
733static
734struct b43_lo_calib *b43_calibrate_lo_setting(struct b43_wldev *dev,
735 const struct b43_bbatt *bbatt,
736 const struct b43_rfatt *rfatt)
737{
738 struct b43_phy *phy = &dev->phy;
739 struct b43_phy_g *gphy = phy->g;
740 struct b43_loctl loctl = {
741 .i = 0,
742 .q = 0,
743 };
744 int max_rx_gain;
745 struct b43_lo_calib *cal;
746 struct lo_g_saved_values uninitialized_var(saved_regs);
747 /* Values from the "TXCTL Register and Value Table" */
748 u16 txctl_reg;
749 u16 txctl_value;
750 u16 pad_mix_gain;
751
752 saved_regs.old_channel = phy->channel;
753 b43_mac_suspend(dev);
754 lo_measure_setup(dev, &saved_regs);
755
756 txctl_reg = lo_txctl_register_table(dev, &txctl_value, &pad_mix_gain);
757
758 b43_radio_maskset(dev, 0x43, 0xFFF0, rfatt->att);
759 b43_radio_maskset(dev, txctl_reg, ~txctl_value, (rfatt->with_padmix ? txctl_value :0));
760
761 max_rx_gain = rfatt->att * 2;
762 max_rx_gain += bbatt->att / 2;
763 if (rfatt->with_padmix)
764 max_rx_gain -= pad_mix_gain;
765 if (has_loopback_gain(phy))
766 max_rx_gain += gphy->max_lb_gain;
767 lo_measure_gain_values(dev, max_rx_gain,
768 has_loopback_gain(phy));
769
770 b43_gphy_set_baseband_attenuation(dev, bbatt->att);
771 lo_probe_loctls_statemachine(dev, &loctl, &max_rx_gain);
772
773 lo_measure_restore(dev, &saved_regs);
774 b43_mac_enable(dev);
775
776 if (b43_debug(dev, B43_DBG_LO)) {
777 b43dbg(dev->wl, "LO: Calibrated for BB(%u), RF(%u,%u) "
778 "=> I=%d Q=%d\n",
779 bbatt->att, rfatt->att, rfatt->with_padmix,
780 loctl.i, loctl.q);
781 }
782
783 cal = kmalloc(sizeof(*cal), GFP_KERNEL);
784 if (!cal) {
785 b43warn(dev->wl, "LO calib: out of memory\n");
786 return NULL;
787 }
788 memcpy(&cal->bbatt, bbatt, sizeof(*bbatt));
789 memcpy(&cal->rfatt, rfatt, sizeof(*rfatt));
790 memcpy(&cal->ctl, &loctl, sizeof(loctl));
791 cal->calib_time = jiffies;
792 INIT_LIST_HEAD(&cal->list);
793
794 return cal;
795}
796
797/* Get a calibrated LO setting for the given attenuation values.
798 * Might return a NULL pointer under OOM! */
799static
800struct b43_lo_calib *b43_get_calib_lo_settings(struct b43_wldev *dev,
801 const struct b43_bbatt *bbatt,
802 const struct b43_rfatt *rfatt)
803{
804 struct b43_txpower_lo_control *lo = dev->phy.g->lo_control;
805 struct b43_lo_calib *c;
806
807 c = b43_find_lo_calib(lo, bbatt, rfatt);
808 if (c)
809 return c;
810 /* Not in the list of calibrated LO settings.
811 * Calibrate it now. */
812 c = b43_calibrate_lo_setting(dev, bbatt, rfatt);
813 if (!c)
814 return NULL;
815 list_add(&c->list, &lo->calib_list);
816
817 return c;
818}
819
820void b43_gphy_dc_lt_init(struct b43_wldev *dev, bool update_all)
821{
822 struct b43_phy *phy = &dev->phy;
823 struct b43_phy_g *gphy = phy->g;
824 struct b43_txpower_lo_control *lo = gphy->lo_control;
825 int i;
826 int rf_offset, bb_offset;
827 const struct b43_rfatt *rfatt;
828 const struct b43_bbatt *bbatt;
829 u64 power_vector;
830 bool table_changed = 0;
831
832 BUILD_BUG_ON(B43_DC_LT_SIZE != 32);
833 B43_WARN_ON(lo->rfatt_list.len * lo->bbatt_list.len > 64);
834
835 power_vector = lo->power_vector;
836 if (!update_all && !power_vector)
837 return; /* Nothing to do. */
838
839 /* Suspend the MAC now to avoid continuous suspend/enable
840 * cycles in the loop. */
841 b43_mac_suspend(dev);
842
843 for (i = 0; i < B43_DC_LT_SIZE * 2; i++) {
844 struct b43_lo_calib *cal;
845 int idx;
846 u16 val;
847
848 if (!update_all && !(power_vector & (((u64)1ULL) << i)))
849 continue;
850 /* Update the table entry for this power_vector bit.
851 * The table rows are RFatt entries and columns are BBatt. */
852 bb_offset = i / lo->rfatt_list.len;
853 rf_offset = i % lo->rfatt_list.len;
854 bbatt = &(lo->bbatt_list.list[bb_offset]);
855 rfatt = &(lo->rfatt_list.list[rf_offset]);
856
857 cal = b43_calibrate_lo_setting(dev, bbatt, rfatt);
858 if (!cal) {
859 b43warn(dev->wl, "LO: Could not "
860 "calibrate DC table entry\n");
861 continue;
862 }
863 /*FIXME: Is Q really in the low nibble? */
864 val = (u8)(cal->ctl.q);
865 val |= ((u8)(cal->ctl.i)) << 4;
866 kfree(cal);
867
868 /* Get the index into the hardware DC LT. */
869 idx = i / 2;
870 /* Change the table in memory. */
871 if (i % 2) {
872 /* Change the high byte. */
873 lo->dc_lt[idx] = (lo->dc_lt[idx] & 0x00FF)
874 | ((val & 0x00FF) << 8);
875 } else {
876 /* Change the low byte. */
877 lo->dc_lt[idx] = (lo->dc_lt[idx] & 0xFF00)
878 | (val & 0x00FF);
879 }
880 table_changed = 1;
881 }
882 if (table_changed) {
883 /* The table changed in memory. Update the hardware table. */
884 for (i = 0; i < B43_DC_LT_SIZE; i++)
885 b43_phy_write(dev, 0x3A0 + i, lo->dc_lt[i]);
886 }
887 b43_mac_enable(dev);
888}
889
890/* Fixup the RF attenuation value for the case where we are
891 * using the PAD mixer. */
892static inline void b43_lo_fixup_rfatt(struct b43_rfatt *rf)
893{
894 if (!rf->with_padmix)
895 return;
896 if ((rf->att != 1) && (rf->att != 2) && (rf->att != 3))
897 rf->att = 4;
898}
899
900void b43_lo_g_adjust(struct b43_wldev *dev)
901{
902 struct b43_phy_g *gphy = dev->phy.g;
903 struct b43_lo_calib *cal;
904 struct b43_rfatt rf;
905
906 memcpy(&rf, &gphy->rfatt, sizeof(rf));
907 b43_lo_fixup_rfatt(&rf);
908
909 cal = b43_get_calib_lo_settings(dev, &gphy->bbatt, &rf);
910 if (!cal)
911 return;
912 b43_lo_write(dev, &cal->ctl);
913}
914
915void b43_lo_g_adjust_to(struct b43_wldev *dev,
916 u16 rfatt, u16 bbatt, u16 tx_control)
917{
918 struct b43_rfatt rf;
919 struct b43_bbatt bb;
920 struct b43_lo_calib *cal;
921
922 memset(&rf, 0, sizeof(rf));
923 memset(&bb, 0, sizeof(bb));
924 rf.att = rfatt;
925 bb.att = bbatt;
926 b43_lo_fixup_rfatt(&rf);
927 cal = b43_get_calib_lo_settings(dev, &bb, &rf);
928 if (!cal)
929 return;
930 b43_lo_write(dev, &cal->ctl);
931}
932
933/* Periodic LO maintanance work */
934void b43_lo_g_maintanance_work(struct b43_wldev *dev)
935{
936 struct b43_phy *phy = &dev->phy;
937 struct b43_phy_g *gphy = phy->g;
938 struct b43_txpower_lo_control *lo = gphy->lo_control;
939 unsigned long now;
940 unsigned long expire;
941 struct b43_lo_calib *cal, *tmp;
942 bool current_item_expired = 0;
943 bool hwpctl;
944
945 if (!lo)
946 return;
947 now = jiffies;
948 hwpctl = b43_has_hardware_pctl(dev);
949
950 if (hwpctl) {
951 /* Read the power vector and update it, if needed. */
952 expire = now - B43_LO_PWRVEC_EXPIRE;
953 if (time_before(lo->pwr_vec_read_time, expire)) {
954 lo_read_power_vector(dev);
955 b43_gphy_dc_lt_init(dev, 0);
956 }
957 //FIXME Recalc the whole DC table from time to time?
958 }
959
960 if (hwpctl)
961 return;
962 /* Search for expired LO settings. Remove them.
963 * Recalibrate the current setting, if expired. */
964 expire = now - B43_LO_CALIB_EXPIRE;
965 list_for_each_entry_safe(cal, tmp, &lo->calib_list, list) {
966 if (!time_before(cal->calib_time, expire))
967 continue;
968 /* This item expired. */
969 if (b43_compare_bbatt(&cal->bbatt, &gphy->bbatt) &&
970 b43_compare_rfatt(&cal->rfatt, &gphy->rfatt)) {
971 B43_WARN_ON(current_item_expired);
972 current_item_expired = 1;
973 }
974 if (b43_debug(dev, B43_DBG_LO)) {
975 b43dbg(dev->wl, "LO: Item BB(%u), RF(%u,%u), "
976 "I=%d, Q=%d expired\n",
977 cal->bbatt.att, cal->rfatt.att,
978 cal->rfatt.with_padmix,
979 cal->ctl.i, cal->ctl.q);
980 }
981 list_del(&cal->list);
982 kfree(cal);
983 }
984 if (current_item_expired || unlikely(list_empty(&lo->calib_list))) {
985 /* Recalibrate currently used LO setting. */
986 if (b43_debug(dev, B43_DBG_LO))
987 b43dbg(dev->wl, "LO: Recalibrating current LO setting\n");
988 cal = b43_calibrate_lo_setting(dev, &gphy->bbatt, &gphy->rfatt);
989 if (cal) {
990 list_add(&cal->list, &lo->calib_list);
991 b43_lo_write(dev, &cal->ctl);
992 } else
993 b43warn(dev->wl, "Failed to recalibrate current LO setting\n");
994 }
995}
996
997void b43_lo_g_cleanup(struct b43_wldev *dev)
998{
999 struct b43_txpower_lo_control *lo = dev->phy.g->lo_control;
1000 struct b43_lo_calib *cal, *tmp;
1001
1002 if (!lo)
1003 return;
1004 list_for_each_entry_safe(cal, tmp, &lo->calib_list, list) {
1005 list_del(&cal->list);
1006 kfree(cal);
1007 }
1008}
1009
1010/* LO Initialization */
1011void b43_lo_g_init(struct b43_wldev *dev)
1012{
1013 if (b43_has_hardware_pctl(dev)) {
1014 lo_read_power_vector(dev);
1015 b43_gphy_dc_lt_init(dev, 1);
1016 }
1017}