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
b43_find_lo_calib(struct b43_txpower_lo_control * lo,const struct b43_bbatt * bbatt,const struct b43_rfatt * rfatt)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. */
b43_lo_write(struct b43_wldev * dev,struct b43_loctl * control)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
lo_measure_feedthrough(struct b43_wldev * dev,u16 lna,u16 pga,u16 trsw_rx)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 */
lo_txctl_register_table(struct b43_wldev * dev,u16 * value,u16 * pad_mix_gain)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
lo_measure_txctl_values(struct b43_wldev * dev)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
lo_read_power_vector(struct b43_wldev * dev)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 */
lo_measure_gain_values(struct b43_wldev * dev,s16 max_rx_gain,int use_trsw_rx)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
lo_measure_setup(struct b43_wldev * dev,struct lo_g_saved_values * sav)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_write(dev, B43_PHY_HPWR_TSSICTL,
410 b43_phy_read(dev, B43_PHY_HPWR_TSSICTL)
411 | 0x100);
412 b43_phy_write(dev, B43_PHY_EXTG(0x01),
413 b43_phy_read(dev, B43_PHY_EXTG(0x01))
414 | 0x40);
415 b43_phy_write(dev, B43_PHY_DACCTL,
416 b43_phy_read(dev, B43_PHY_DACCTL)
417 | 0x40);
418 b43_phy_write(dev, B43_PHY_CCK(0x14),
419 b43_phy_read(dev, B43_PHY_CCK(0x14))
420 | 0x200);
421 }
422 if (phy->type == B43_PHYTYPE_B &&
423 phy->radio_ver == 0x2050 && phy->radio_rev < 6) {
424 b43_phy_write(dev, B43_PHY_CCK(0x16), 0x410);
425 b43_phy_write(dev, B43_PHY_CCK(0x17), 0x820);
426 }
427 if (phy->rev >= 2) {
428 sav->phy_analogover = b43_phy_read(dev, B43_PHY_ANALOGOVER);
429 sav->phy_analogoverval =
430 b43_phy_read(dev, B43_PHY_ANALOGOVERVAL);
431 sav->phy_rfover = b43_phy_read(dev, B43_PHY_RFOVER);
432 sav->phy_rfoverval = b43_phy_read(dev, B43_PHY_RFOVERVAL);
433 sav->phy_classctl = b43_phy_read(dev, B43_PHY_CLASSCTL);
434 sav->phy_cck_3E = b43_phy_read(dev, B43_PHY_CCK(0x3E));
435 sav->phy_crs0 = b43_phy_read(dev, B43_PHY_CRS0);
436
437 b43_phy_write(dev, B43_PHY_CLASSCTL,
438 b43_phy_read(dev, B43_PHY_CLASSCTL)
439 & 0xFFFC);
440 b43_phy_write(dev, B43_PHY_CRS0, b43_phy_read(dev, B43_PHY_CRS0)
441 & 0x7FFF);
442 b43_phy_write(dev, B43_PHY_ANALOGOVER,
443 b43_phy_read(dev, B43_PHY_ANALOGOVER)
444 | 0x0003);
445 b43_phy_write(dev, B43_PHY_ANALOGOVERVAL,
446 b43_phy_read(dev, B43_PHY_ANALOGOVERVAL)
447 & 0xFFFC);
448 if (phy->type == B43_PHYTYPE_G) {
449 if ((phy->rev >= 7) &&
450 (sprom->boardflags_lo & B43_BFL_EXTLNA)) {
451 b43_phy_write(dev, B43_PHY_RFOVER, 0x933);
452 } else {
453 b43_phy_write(dev, B43_PHY_RFOVER, 0x133);
454 }
455 } else {
456 b43_phy_write(dev, B43_PHY_RFOVER, 0);
457 }
458 b43_phy_write(dev, B43_PHY_CCK(0x3E), 0);
459 }
460 sav->reg_3F4 = b43_read16(dev, 0x3F4);
461 sav->reg_3E2 = b43_read16(dev, 0x3E2);
462 sav->radio_43 = b43_radio_read16(dev, 0x43);
463 sav->radio_7A = b43_radio_read16(dev, 0x7A);
464 sav->phy_pgactl = b43_phy_read(dev, B43_PHY_PGACTL);
465 sav->phy_cck_2A = b43_phy_read(dev, B43_PHY_CCK(0x2A));
466 sav->phy_syncctl = b43_phy_read(dev, B43_PHY_SYNCCTL);
467 sav->phy_dacctl = b43_phy_read(dev, B43_PHY_DACCTL);
468
469 if (!has_tx_magnification(phy)) {
470 sav->radio_52 = b43_radio_read16(dev, 0x52);
471 sav->radio_52 &= 0x00F0;
472 }
473 if (phy->type == B43_PHYTYPE_B) {
474 sav->phy_cck_30 = b43_phy_read(dev, B43_PHY_CCK(0x30));
475 sav->phy_cck_06 = b43_phy_read(dev, B43_PHY_CCK(0x06));
476 b43_phy_write(dev, B43_PHY_CCK(0x30), 0x00FF);
477 b43_phy_write(dev, B43_PHY_CCK(0x06), 0x3F3F);
478 } else {
479 b43_write16(dev, 0x3E2, b43_read16(dev, 0x3E2)
480 | 0x8000);
481 }
482 b43_write16(dev, 0x3F4, b43_read16(dev, 0x3F4)
483 & 0xF000);
484
485 tmp =
486 (phy->type == B43_PHYTYPE_G) ? B43_PHY_LO_MASK : B43_PHY_CCK(0x2E);
487 b43_phy_write(dev, tmp, 0x007F);
488
489 tmp = sav->phy_syncctl;
490 b43_phy_write(dev, B43_PHY_SYNCCTL, tmp & 0xFF7F);
491 tmp = sav->radio_7A;
492 b43_radio_write16(dev, 0x007A, tmp & 0xFFF0);
493
494 b43_phy_write(dev, B43_PHY_CCK(0x2A), 0x8A3);
495 if (phy->type == B43_PHYTYPE_G ||
496 (phy->type == B43_PHYTYPE_B &&
497 phy->radio_ver == 0x2050 && phy->radio_rev >= 6)) {
498 b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x1003);
499 } else
500 b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x0802);
501 if (phy->rev >= 2)
502 b43_dummy_transmission(dev);
503 b43_gphy_channel_switch(dev, 6, 0);
504 b43_radio_read16(dev, 0x51); /* dummy read */
505 if (phy->type == B43_PHYTYPE_G)
506 b43_phy_write(dev, B43_PHY_CCK(0x2F), 0);
507
508 /* Re-measure the txctl values, if needed. */
509 if (time_before(lo->txctl_measured_time,
510 jiffies - B43_LO_TXCTL_EXPIRE))
511 lo_measure_txctl_values(dev);
512
513 if (phy->type == B43_PHYTYPE_G && phy->rev >= 3) {
514 b43_phy_write(dev, B43_PHY_LO_MASK, 0xC078);
515 } else {
516 if (phy->type == B43_PHYTYPE_B)
517 b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078);
518 else
519 b43_phy_write(dev, B43_PHY_LO_MASK, 0x8078);
520 }
521 }
522
lo_measure_restore(struct b43_wldev * dev,struct lo_g_saved_values * sav)523 static void lo_measure_restore(struct b43_wldev *dev,
524 struct lo_g_saved_values *sav)
525 {
526 struct b43_phy *phy = &dev->phy;
527 struct b43_phy_g *gphy = phy->g;
528 u16 tmp;
529
530 if (phy->rev >= 2) {
531 b43_phy_write(dev, B43_PHY_PGACTL, 0xE300);
532 tmp = (gphy->pga_gain << 8);
533 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA0);
534 udelay(5);
535 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA2);
536 udelay(2);
537 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA3);
538 } else {
539 tmp = (gphy->pga_gain | 0xEFA0);
540 b43_phy_write(dev, B43_PHY_PGACTL, tmp);
541 }
542 if (phy->type == B43_PHYTYPE_G) {
543 if (phy->rev >= 3)
544 b43_phy_write(dev, B43_PHY_CCK(0x2E), 0xC078);
545 else
546 b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078);
547 if (phy->rev >= 2)
548 b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0202);
549 else
550 b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0101);
551 }
552 b43_write16(dev, 0x3F4, sav->reg_3F4);
553 b43_phy_write(dev, B43_PHY_PGACTL, sav->phy_pgactl);
554 b43_phy_write(dev, B43_PHY_CCK(0x2A), sav->phy_cck_2A);
555 b43_phy_write(dev, B43_PHY_SYNCCTL, sav->phy_syncctl);
556 b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl);
557 b43_radio_write16(dev, 0x43, sav->radio_43);
558 b43_radio_write16(dev, 0x7A, sav->radio_7A);
559 if (!has_tx_magnification(phy)) {
560 tmp = sav->radio_52;
561 b43_radio_write16(dev, 0x52, (b43_radio_read16(dev, 0x52)
562 & 0xFF0F) | tmp);
563 }
564 b43_write16(dev, 0x3E2, sav->reg_3E2);
565 if (phy->type == B43_PHYTYPE_B &&
566 phy->radio_ver == 0x2050 && phy->radio_rev <= 5) {
567 b43_phy_write(dev, B43_PHY_CCK(0x30), sav->phy_cck_30);
568 b43_phy_write(dev, B43_PHY_CCK(0x06), sav->phy_cck_06);
569 }
570 if (phy->rev >= 2) {
571 b43_phy_write(dev, B43_PHY_ANALOGOVER, sav->phy_analogover);
572 b43_phy_write(dev, B43_PHY_ANALOGOVERVAL,
573 sav->phy_analogoverval);
574 b43_phy_write(dev, B43_PHY_CLASSCTL, sav->phy_classctl);
575 b43_phy_write(dev, B43_PHY_RFOVER, sav->phy_rfover);
576 b43_phy_write(dev, B43_PHY_RFOVERVAL, sav->phy_rfoverval);
577 b43_phy_write(dev, B43_PHY_CCK(0x3E), sav->phy_cck_3E);
578 b43_phy_write(dev, B43_PHY_CRS0, sav->phy_crs0);
579 }
580 if (b43_has_hardware_pctl(dev)) {
581 tmp = (sav->phy_lo_mask & 0xBFFF);
582 b43_phy_write(dev, B43_PHY_LO_MASK, tmp);
583 b43_phy_write(dev, B43_PHY_EXTG(0x01), sav->phy_extg_01);
584 b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl_hwpctl);
585 b43_phy_write(dev, B43_PHY_CCK(0x14), sav->phy_cck_14);
586 b43_phy_write(dev, B43_PHY_HPWR_TSSICTL, sav->phy_hpwr_tssictl);
587 }
588 b43_gphy_channel_switch(dev, sav->old_channel, 1);
589 }
590
591 struct b43_lo_g_statemachine {
592 int current_state;
593 int nr_measured;
594 int state_val_multiplier;
595 u16 lowest_feedth;
596 struct b43_loctl min_loctl;
597 };
598
599 /* Loop over each possible value in this state. */
lo_probe_possible_loctls(struct b43_wldev * dev,struct b43_loctl * probe_loctl,struct b43_lo_g_statemachine * d)600 static int lo_probe_possible_loctls(struct b43_wldev *dev,
601 struct b43_loctl *probe_loctl,
602 struct b43_lo_g_statemachine *d)
603 {
604 struct b43_phy *phy = &dev->phy;
605 struct b43_phy_g *gphy = phy->g;
606 struct b43_loctl test_loctl;
607 struct b43_loctl orig_loctl;
608 struct b43_loctl prev_loctl = {
609 .i = -100,
610 .q = -100,
611 };
612 int i;
613 int begin, end;
614 int found_lower = 0;
615 u16 feedth;
616
617 static const struct b43_loctl modifiers[] = {
618 {.i = 1,.q = 1,},
619 {.i = 1,.q = 0,},
620 {.i = 1,.q = -1,},
621 {.i = 0,.q = -1,},
622 {.i = -1,.q = -1,},
623 {.i = -1,.q = 0,},
624 {.i = -1,.q = 1,},
625 {.i = 0,.q = 1,},
626 };
627
628 if (d->current_state == 0) {
629 begin = 1;
630 end = 8;
631 } else if (d->current_state % 2 == 0) {
632 begin = d->current_state - 1;
633 end = d->current_state + 1;
634 } else {
635 begin = d->current_state - 2;
636 end = d->current_state + 2;
637 }
638 if (begin < 1)
639 begin += 8;
640 if (end > 8)
641 end -= 8;
642
643 memcpy(&orig_loctl, probe_loctl, sizeof(struct b43_loctl));
644 i = begin;
645 d->current_state = i;
646 while (1) {
647 B43_WARN_ON(!(i >= 1 && i <= 8));
648 memcpy(&test_loctl, &orig_loctl, sizeof(struct b43_loctl));
649 test_loctl.i += modifiers[i - 1].i * d->state_val_multiplier;
650 test_loctl.q += modifiers[i - 1].q * d->state_val_multiplier;
651 if ((test_loctl.i != prev_loctl.i ||
652 test_loctl.q != prev_loctl.q) &&
653 (abs(test_loctl.i) <= 16 && abs(test_loctl.q) <= 16)) {
654 b43_lo_write(dev, &test_loctl);
655 feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
656 gphy->pga_gain,
657 gphy->trsw_rx_gain);
658 if (feedth < d->lowest_feedth) {
659 memcpy(probe_loctl, &test_loctl,
660 sizeof(struct b43_loctl));
661 found_lower = 1;
662 d->lowest_feedth = feedth;
663 if ((d->nr_measured < 2) &&
664 !has_loopback_gain(phy))
665 break;
666 }
667 }
668 memcpy(&prev_loctl, &test_loctl, sizeof(prev_loctl));
669 if (i == end)
670 break;
671 if (i == 8)
672 i = 1;
673 else
674 i++;
675 d->current_state = i;
676 }
677
678 return found_lower;
679 }
680
lo_probe_loctls_statemachine(struct b43_wldev * dev,struct b43_loctl * loctl,int * max_rx_gain)681 static void lo_probe_loctls_statemachine(struct b43_wldev *dev,
682 struct b43_loctl *loctl,
683 int *max_rx_gain)
684 {
685 struct b43_phy *phy = &dev->phy;
686 struct b43_phy_g *gphy = phy->g;
687 struct b43_lo_g_statemachine d;
688 u16 feedth;
689 int found_lower;
690 struct b43_loctl probe_loctl;
691 int max_repeat = 1, repeat_cnt = 0;
692
693 d.nr_measured = 0;
694 d.state_val_multiplier = 1;
695 if (has_loopback_gain(phy))
696 d.state_val_multiplier = 3;
697
698 memcpy(&d.min_loctl, loctl, sizeof(struct b43_loctl));
699 if (has_loopback_gain(phy))
700 max_repeat = 4;
701 do {
702 b43_lo_write(dev, &d.min_loctl);
703 feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
704 gphy->pga_gain,
705 gphy->trsw_rx_gain);
706 if (feedth < 0x258) {
707 if (feedth >= 0x12C)
708 *max_rx_gain += 6;
709 else
710 *max_rx_gain += 3;
711 feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
712 gphy->pga_gain,
713 gphy->trsw_rx_gain);
714 }
715 d.lowest_feedth = feedth;
716
717 d.current_state = 0;
718 do {
719 B43_WARN_ON(!
720 (d.current_state >= 0
721 && d.current_state <= 8));
722 memcpy(&probe_loctl, &d.min_loctl,
723 sizeof(struct b43_loctl));
724 found_lower =
725 lo_probe_possible_loctls(dev, &probe_loctl, &d);
726 if (!found_lower)
727 break;
728 if ((probe_loctl.i == d.min_loctl.i) &&
729 (probe_loctl.q == d.min_loctl.q))
730 break;
731 memcpy(&d.min_loctl, &probe_loctl,
732 sizeof(struct b43_loctl));
733 d.nr_measured++;
734 } while (d.nr_measured < 24);
735 memcpy(loctl, &d.min_loctl, sizeof(struct b43_loctl));
736
737 if (has_loopback_gain(phy)) {
738 if (d.lowest_feedth > 0x1194)
739 *max_rx_gain -= 6;
740 else if (d.lowest_feedth < 0x5DC)
741 *max_rx_gain += 3;
742 if (repeat_cnt == 0) {
743 if (d.lowest_feedth <= 0x5DC) {
744 d.state_val_multiplier = 1;
745 repeat_cnt++;
746 } else
747 d.state_val_multiplier = 2;
748 } else if (repeat_cnt == 2)
749 d.state_val_multiplier = 1;
750 }
751 lo_measure_gain_values(dev, *max_rx_gain,
752 has_loopback_gain(phy));
753 } while (++repeat_cnt < max_repeat);
754 }
755
756 static
b43_calibrate_lo_setting(struct b43_wldev * dev,const struct b43_bbatt * bbatt,const struct b43_rfatt * rfatt)757 struct b43_lo_calib * b43_calibrate_lo_setting(struct b43_wldev *dev,
758 const struct b43_bbatt *bbatt,
759 const struct b43_rfatt *rfatt)
760 {
761 struct b43_phy *phy = &dev->phy;
762 struct b43_phy_g *gphy = phy->g;
763 struct b43_loctl loctl = {
764 .i = 0,
765 .q = 0,
766 };
767 int max_rx_gain;
768 struct b43_lo_calib *cal;
769 struct lo_g_saved_values uninitialized_var(saved_regs);
770 /* Values from the "TXCTL Register and Value Table" */
771 u16 txctl_reg;
772 u16 txctl_value;
773 u16 pad_mix_gain;
774
775 saved_regs.old_channel = phy->channel;
776 b43_mac_suspend(dev);
777 lo_measure_setup(dev, &saved_regs);
778
779 txctl_reg = lo_txctl_register_table(dev, &txctl_value, &pad_mix_gain);
780
781 b43_radio_write16(dev, 0x43,
782 (b43_radio_read16(dev, 0x43) & 0xFFF0)
783 | rfatt->att);
784 b43_radio_write16(dev, txctl_reg,
785 (b43_radio_read16(dev, txctl_reg) & ~txctl_value)
786 | (rfatt->with_padmix) ? txctl_value : 0);
787
788 max_rx_gain = rfatt->att * 2;
789 max_rx_gain += bbatt->att / 2;
790 if (rfatt->with_padmix)
791 max_rx_gain -= pad_mix_gain;
792 if (has_loopback_gain(phy))
793 max_rx_gain += gphy->max_lb_gain;
794 lo_measure_gain_values(dev, max_rx_gain,
795 has_loopback_gain(phy));
796
797 b43_gphy_set_baseband_attenuation(dev, bbatt->att);
798 lo_probe_loctls_statemachine(dev, &loctl, &max_rx_gain);
799
800 lo_measure_restore(dev, &saved_regs);
801 b43_mac_enable(dev);
802
803 if (b43_debug(dev, B43_DBG_LO)) {
804 b43dbg(dev->wl, "LO: Calibrated for BB(%u), RF(%u,%u) "
805 "=> I=%d Q=%d\n",
806 bbatt->att, rfatt->att, rfatt->with_padmix,
807 loctl.i, loctl.q);
808 }
809
810 cal = kmalloc(sizeof(*cal), GFP_KERNEL);
811 if (!cal) {
812 b43warn(dev->wl, "LO calib: out of memory\n");
813 return NULL;
814 }
815 memcpy(&cal->bbatt, bbatt, sizeof(*bbatt));
816 memcpy(&cal->rfatt, rfatt, sizeof(*rfatt));
817 memcpy(&cal->ctl, &loctl, sizeof(loctl));
818 cal->calib_time = jiffies;
819 INIT_LIST_HEAD(&cal->list);
820
821 return cal;
822 }
823
824 /* Get a calibrated LO setting for the given attenuation values.
825 * Might return a NULL pointer under OOM! */
826 static
b43_get_calib_lo_settings(struct b43_wldev * dev,const struct b43_bbatt * bbatt,const struct b43_rfatt * rfatt)827 struct b43_lo_calib * b43_get_calib_lo_settings(struct b43_wldev *dev,
828 const struct b43_bbatt *bbatt,
829 const struct b43_rfatt *rfatt)
830 {
831 struct b43_txpower_lo_control *lo = dev->phy.g->lo_control;
832 struct b43_lo_calib *c;
833
834 c = b43_find_lo_calib(lo, bbatt, rfatt);
835 if (c)
836 return c;
837 /* Not in the list of calibrated LO settings.
838 * Calibrate it now. */
839 c = b43_calibrate_lo_setting(dev, bbatt, rfatt);
840 if (!c)
841 return NULL;
842 list_add(&c->list, &lo->calib_list);
843
844 return c;
845 }
846
b43_gphy_dc_lt_init(struct b43_wldev * dev,bool update_all)847 void b43_gphy_dc_lt_init(struct b43_wldev *dev, bool update_all)
848 {
849 struct b43_phy *phy = &dev->phy;
850 struct b43_phy_g *gphy = phy->g;
851 struct b43_txpower_lo_control *lo = gphy->lo_control;
852 int i;
853 int rf_offset, bb_offset;
854 const struct b43_rfatt *rfatt;
855 const struct b43_bbatt *bbatt;
856 u64 power_vector;
857 bool table_changed = 0;
858
859 BUILD_BUG_ON(B43_DC_LT_SIZE != 32);
860 B43_WARN_ON(lo->rfatt_list.len * lo->bbatt_list.len > 64);
861
862 power_vector = lo->power_vector;
863 if (!update_all && !power_vector)
864 return; /* Nothing to do. */
865
866 /* Suspend the MAC now to avoid continuous suspend/enable
867 * cycles in the loop. */
868 b43_mac_suspend(dev);
869
870 for (i = 0; i < B43_DC_LT_SIZE * 2; i++) {
871 struct b43_lo_calib *cal;
872 int idx;
873 u16 val;
874
875 if (!update_all && !(power_vector & (((u64)1ULL) << i)))
876 continue;
877 /* Update the table entry for this power_vector bit.
878 * The table rows are RFatt entries and columns are BBatt. */
879 bb_offset = i / lo->rfatt_list.len;
880 rf_offset = i % lo->rfatt_list.len;
881 bbatt = &(lo->bbatt_list.list[bb_offset]);
882 rfatt = &(lo->rfatt_list.list[rf_offset]);
883
884 cal = b43_calibrate_lo_setting(dev, bbatt, rfatt);
885 if (!cal) {
886 b43warn(dev->wl, "LO: Could not "
887 "calibrate DC table entry\n");
888 continue;
889 }
890 /*FIXME: Is Q really in the low nibble? */
891 val = (u8)(cal->ctl.q);
892 val |= ((u8)(cal->ctl.i)) << 4;
893 kfree(cal);
894
895 /* Get the index into the hardware DC LT. */
896 idx = i / 2;
897 /* Change the table in memory. */
898 if (i % 2) {
899 /* Change the high byte. */
900 lo->dc_lt[idx] = (lo->dc_lt[idx] & 0x00FF)
901 | ((val & 0x00FF) << 8);
902 } else {
903 /* Change the low byte. */
904 lo->dc_lt[idx] = (lo->dc_lt[idx] & 0xFF00)
905 | (val & 0x00FF);
906 }
907 table_changed = 1;
908 }
909 if (table_changed) {
910 /* The table changed in memory. Update the hardware table. */
911 for (i = 0; i < B43_DC_LT_SIZE; i++)
912 b43_phy_write(dev, 0x3A0 + i, lo->dc_lt[i]);
913 }
914 b43_mac_enable(dev);
915 }
916
917 /* Fixup the RF attenuation value for the case where we are
918 * using the PAD mixer. */
b43_lo_fixup_rfatt(struct b43_rfatt * rf)919 static inline void b43_lo_fixup_rfatt(struct b43_rfatt *rf)
920 {
921 if (!rf->with_padmix)
922 return;
923 if ((rf->att != 1) && (rf->att != 2) && (rf->att != 3))
924 rf->att = 4;
925 }
926
b43_lo_g_adjust(struct b43_wldev * dev)927 void b43_lo_g_adjust(struct b43_wldev *dev)
928 {
929 struct b43_phy_g *gphy = dev->phy.g;
930 struct b43_lo_calib *cal;
931 struct b43_rfatt rf;
932
933 memcpy(&rf, &gphy->rfatt, sizeof(rf));
934 b43_lo_fixup_rfatt(&rf);
935
936 cal = b43_get_calib_lo_settings(dev, &gphy->bbatt, &rf);
937 if (!cal)
938 return;
939 b43_lo_write(dev, &cal->ctl);
940 }
941
b43_lo_g_adjust_to(struct b43_wldev * dev,u16 rfatt,u16 bbatt,u16 tx_control)942 void b43_lo_g_adjust_to(struct b43_wldev *dev,
943 u16 rfatt, u16 bbatt, u16 tx_control)
944 {
945 struct b43_rfatt rf;
946 struct b43_bbatt bb;
947 struct b43_lo_calib *cal;
948
949 memset(&rf, 0, sizeof(rf));
950 memset(&bb, 0, sizeof(bb));
951 rf.att = rfatt;
952 bb.att = bbatt;
953 b43_lo_fixup_rfatt(&rf);
954 cal = b43_get_calib_lo_settings(dev, &bb, &rf);
955 if (!cal)
956 return;
957 b43_lo_write(dev, &cal->ctl);
958 }
959
960 /* Periodic LO maintanance work */
b43_lo_g_maintanance_work(struct b43_wldev * dev)961 void b43_lo_g_maintanance_work(struct b43_wldev *dev)
962 {
963 struct b43_phy *phy = &dev->phy;
964 struct b43_phy_g *gphy = phy->g;
965 struct b43_txpower_lo_control *lo = gphy->lo_control;
966 unsigned long now;
967 unsigned long expire;
968 struct b43_lo_calib *cal, *tmp;
969 bool current_item_expired = 0;
970 bool hwpctl;
971
972 if (!lo)
973 return;
974 now = jiffies;
975 hwpctl = b43_has_hardware_pctl(dev);
976
977 if (hwpctl) {
978 /* Read the power vector and update it, if needed. */
979 expire = now - B43_LO_PWRVEC_EXPIRE;
980 if (time_before(lo->pwr_vec_read_time, expire)) {
981 lo_read_power_vector(dev);
982 b43_gphy_dc_lt_init(dev, 0);
983 }
984 //FIXME Recalc the whole DC table from time to time?
985 }
986
987 if (hwpctl)
988 return;
989 /* Search for expired LO settings. Remove them.
990 * Recalibrate the current setting, if expired. */
991 expire = now - B43_LO_CALIB_EXPIRE;
992 list_for_each_entry_safe(cal, tmp, &lo->calib_list, list) {
993 if (!time_before(cal->calib_time, expire))
994 continue;
995 /* This item expired. */
996 if (b43_compare_bbatt(&cal->bbatt, &gphy->bbatt) &&
997 b43_compare_rfatt(&cal->rfatt, &gphy->rfatt)) {
998 B43_WARN_ON(current_item_expired);
999 current_item_expired = 1;
1000 }
1001 if (b43_debug(dev, B43_DBG_LO)) {
1002 b43dbg(dev->wl, "LO: Item BB(%u), RF(%u,%u), "
1003 "I=%d, Q=%d expired\n",
1004 cal->bbatt.att, cal->rfatt.att,
1005 cal->rfatt.with_padmix,
1006 cal->ctl.i, cal->ctl.q);
1007 }
1008 list_del(&cal->list);
1009 kfree(cal);
1010 }
1011 if (current_item_expired || unlikely(list_empty(&lo->calib_list))) {
1012 /* Recalibrate currently used LO setting. */
1013 if (b43_debug(dev, B43_DBG_LO))
1014 b43dbg(dev->wl, "LO: Recalibrating current LO setting\n");
1015 cal = b43_calibrate_lo_setting(dev, &gphy->bbatt, &gphy->rfatt);
1016 if (cal) {
1017 list_add(&cal->list, &lo->calib_list);
1018 b43_lo_write(dev, &cal->ctl);
1019 } else
1020 b43warn(dev->wl, "Failed to recalibrate current LO setting\n");
1021 }
1022 }
1023
b43_lo_g_cleanup(struct b43_wldev * dev)1024 void b43_lo_g_cleanup(struct b43_wldev *dev)
1025 {
1026 struct b43_txpower_lo_control *lo = dev->phy.g->lo_control;
1027 struct b43_lo_calib *cal, *tmp;
1028
1029 if (!lo)
1030 return;
1031 list_for_each_entry_safe(cal, tmp, &lo->calib_list, list) {
1032 list_del(&cal->list);
1033 kfree(cal);
1034 }
1035 }
1036
1037 /* LO Initialization */
b43_lo_g_init(struct b43_wldev * dev)1038 void b43_lo_g_init(struct b43_wldev *dev)
1039 {
1040 if (b43_has_hardware_pctl(dev)) {
1041 lo_read_power_vector(dev);
1042 b43_gphy_dc_lt_init(dev, 1);
1043 }
1044 }
1045