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[mirror_ubuntu-hirsute-kernel.git] / drivers / net / wireless / broadcom / b43 / lo.c
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3
4 Broadcom B43 wireless driver
5
6 G PHY LO (LocalOscillator) Measuring and Control routines
7
8 Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>,
9 Copyright (c) 2005, 2006 Stefano Brivio <stefano.brivio@polimi.it>
10 Copyright (c) 2005-2007 Michael Buesch <m@bues.ch>
11 Copyright (c) 2005, 2006 Danny van Dyk <kugelfang@gentoo.org>
12 Copyright (c) 2005, 2006 Andreas Jaggi <andreas.jaggi@waterwave.ch>
13
14
15 */
16
17 #include "b43.h"
18 #include "lo.h"
19 #include "phy_g.h"
20 #include "main.h"
21
22 #include <linux/delay.h>
23 #include <linux/sched.h>
24 #include <linux/slab.h>
25
26
27 static struct b43_lo_calib *b43_find_lo_calib(struct b43_txpower_lo_control *lo,
28 const struct b43_bbatt *bbatt,
29 const struct b43_rfatt *rfatt)
30 {
31 struct b43_lo_calib *c;
32
33 list_for_each_entry(c, &lo->calib_list, list) {
34 if (!b43_compare_bbatt(&c->bbatt, bbatt))
35 continue;
36 if (!b43_compare_rfatt(&c->rfatt, rfatt))
37 continue;
38 return c;
39 }
40
41 return NULL;
42 }
43
44 /* Write the LocalOscillator Control (adjust) value-pair. */
45 static void b43_lo_write(struct b43_wldev *dev, struct b43_loctl *control)
46 {
47 struct b43_phy *phy = &dev->phy;
48 u16 value;
49
50 if (B43_DEBUG) {
51 if (unlikely(abs(control->i) > 16 || abs(control->q) > 16)) {
52 b43dbg(dev->wl, "Invalid LO control pair "
53 "(I: %d, Q: %d)\n", control->i, control->q);
54 dump_stack();
55 return;
56 }
57 }
58 B43_WARN_ON(phy->type != B43_PHYTYPE_G);
59
60 value = (u8) (control->q);
61 value |= ((u8) (control->i)) << 8;
62 b43_phy_write(dev, B43_PHY_LO_CTL, value);
63 }
64
65 static u16 lo_measure_feedthrough(struct b43_wldev *dev,
66 u16 lna, u16 pga, u16 trsw_rx)
67 {
68 struct b43_phy *phy = &dev->phy;
69 u16 rfover;
70 u16 feedthrough;
71
72 if (phy->gmode) {
73 lna <<= B43_PHY_RFOVERVAL_LNA_SHIFT;
74 pga <<= B43_PHY_RFOVERVAL_PGA_SHIFT;
75
76 B43_WARN_ON(lna & ~B43_PHY_RFOVERVAL_LNA);
77 B43_WARN_ON(pga & ~B43_PHY_RFOVERVAL_PGA);
78 /*FIXME This assertion fails B43_WARN_ON(trsw_rx & ~(B43_PHY_RFOVERVAL_TRSWRX |
79 B43_PHY_RFOVERVAL_BW));
80 */
81 trsw_rx &= (B43_PHY_RFOVERVAL_TRSWRX | B43_PHY_RFOVERVAL_BW);
82
83 /* Construct the RF Override Value */
84 rfover = B43_PHY_RFOVERVAL_UNK;
85 rfover |= pga;
86 rfover |= lna;
87 rfover |= trsw_rx;
88 if ((dev->dev->bus_sprom->boardflags_lo & B43_BFL_EXTLNA)
89 && phy->rev > 6)
90 rfover |= B43_PHY_RFOVERVAL_EXTLNA;
91
92 b43_phy_write(dev, B43_PHY_PGACTL, 0xE300);
93 b43_phy_write(dev, B43_PHY_RFOVERVAL, rfover);
94 udelay(10);
95 rfover |= B43_PHY_RFOVERVAL_BW_LBW;
96 b43_phy_write(dev, B43_PHY_RFOVERVAL, rfover);
97 udelay(10);
98 rfover |= B43_PHY_RFOVERVAL_BW_LPF;
99 b43_phy_write(dev, B43_PHY_RFOVERVAL, rfover);
100 udelay(10);
101 b43_phy_write(dev, B43_PHY_PGACTL, 0xF300);
102 } else {
103 pga |= B43_PHY_PGACTL_UNKNOWN;
104 b43_phy_write(dev, B43_PHY_PGACTL, pga);
105 udelay(10);
106 pga |= B43_PHY_PGACTL_LOWBANDW;
107 b43_phy_write(dev, B43_PHY_PGACTL, pga);
108 udelay(10);
109 pga |= B43_PHY_PGACTL_LPF;
110 b43_phy_write(dev, B43_PHY_PGACTL, pga);
111 }
112 udelay(21);
113 feedthrough = b43_phy_read(dev, B43_PHY_LO_LEAKAGE);
114
115 /* This is a good place to check if we need to relax a bit,
116 * as this is the main function called regularly
117 * in the LO calibration. */
118 cond_resched();
119
120 return feedthrough;
121 }
122
123 /* TXCTL Register and Value Table.
124 * Returns the "TXCTL Register".
125 * "value" is the "TXCTL Value".
126 * "pad_mix_gain" is the PAD Mixer Gain.
127 */
128 static u16 lo_txctl_register_table(struct b43_wldev *dev,
129 u16 *value, u16 *pad_mix_gain)
130 {
131 struct b43_phy *phy = &dev->phy;
132 u16 reg, v, padmix;
133
134 if (phy->type == B43_PHYTYPE_B) {
135 v = 0x30;
136 if (phy->radio_rev <= 5) {
137 reg = 0x43;
138 padmix = 0;
139 } else {
140 reg = 0x52;
141 padmix = 5;
142 }
143 } else {
144 if (phy->rev >= 2 && phy->radio_rev == 8) {
145 reg = 0x43;
146 v = 0x10;
147 padmix = 2;
148 } else {
149 reg = 0x52;
150 v = 0x30;
151 padmix = 5;
152 }
153 }
154 if (value)
155 *value = v;
156 if (pad_mix_gain)
157 *pad_mix_gain = padmix;
158
159 return reg;
160 }
161
162 static void lo_measure_txctl_values(struct b43_wldev *dev)
163 {
164 struct b43_phy *phy = &dev->phy;
165 struct b43_phy_g *gphy = phy->g;
166 struct b43_txpower_lo_control *lo = gphy->lo_control;
167 u16 reg, mask;
168 u16 trsw_rx, pga;
169 u16 radio_pctl_reg;
170
171 static const u8 tx_bias_values[] = {
172 0x09, 0x08, 0x0A, 0x01, 0x00,
173 0x02, 0x05, 0x04, 0x06,
174 };
175 static const u8 tx_magn_values[] = {
176 0x70, 0x40,
177 };
178
179 if (!has_loopback_gain(phy)) {
180 radio_pctl_reg = 6;
181 trsw_rx = 2;
182 pga = 0;
183 } else {
184 int lb_gain; /* Loopback gain (in dB) */
185
186 trsw_rx = 0;
187 lb_gain = gphy->max_lb_gain / 2;
188 if (lb_gain > 10) {
189 radio_pctl_reg = 0;
190 pga = abs(10 - lb_gain) / 6;
191 pga = clamp_val(pga, 0, 15);
192 } else {
193 int cmp_val;
194 int tmp;
195
196 pga = 0;
197 cmp_val = 0x24;
198 if ((phy->rev >= 2) &&
199 (phy->radio_ver == 0x2050) && (phy->radio_rev == 8))
200 cmp_val = 0x3C;
201 tmp = lb_gain;
202 if ((10 - lb_gain) < cmp_val)
203 tmp = (10 - lb_gain);
204 if (tmp < 0)
205 tmp += 6;
206 else
207 tmp += 3;
208 cmp_val /= 4;
209 tmp /= 4;
210 if (tmp >= cmp_val)
211 radio_pctl_reg = cmp_val;
212 else
213 radio_pctl_reg = tmp;
214 }
215 }
216 b43_radio_maskset(dev, 0x43, 0xFFF0, radio_pctl_reg);
217 b43_gphy_set_baseband_attenuation(dev, 2);
218
219 reg = lo_txctl_register_table(dev, &mask, NULL);
220 mask = ~mask;
221 b43_radio_mask(dev, reg, mask);
222
223 if (has_tx_magnification(phy)) {
224 int i, j;
225 int feedthrough;
226 int min_feedth = 0xFFFF;
227 u8 tx_magn, tx_bias;
228
229 for (i = 0; i < ARRAY_SIZE(tx_magn_values); i++) {
230 tx_magn = tx_magn_values[i];
231 b43_radio_maskset(dev, 0x52, 0xFF0F, tx_magn);
232 for (j = 0; j < ARRAY_SIZE(tx_bias_values); j++) {
233 tx_bias = tx_bias_values[j];
234 b43_radio_maskset(dev, 0x52, 0xFFF0, tx_bias);
235 feedthrough =
236 lo_measure_feedthrough(dev, 0, pga,
237 trsw_rx);
238 if (feedthrough < min_feedth) {
239 lo->tx_bias = tx_bias;
240 lo->tx_magn = tx_magn;
241 min_feedth = feedthrough;
242 }
243 if (lo->tx_bias == 0)
244 break;
245 }
246 b43_radio_write16(dev, 0x52,
247 (b43_radio_read16(dev, 0x52)
248 & 0xFF00) | lo->tx_bias | lo->
249 tx_magn);
250 }
251 } else {
252 lo->tx_magn = 0;
253 lo->tx_bias = 0;
254 b43_radio_mask(dev, 0x52, 0xFFF0); /* TX bias == 0 */
255 }
256 lo->txctl_measured_time = jiffies;
257 }
258
259 static void lo_read_power_vector(struct b43_wldev *dev)
260 {
261 struct b43_phy *phy = &dev->phy;
262 struct b43_phy_g *gphy = phy->g;
263 struct b43_txpower_lo_control *lo = gphy->lo_control;
264 int i;
265 u64 tmp;
266 u64 power_vector = 0;
267
268 for (i = 0; i < 8; i += 2) {
269 tmp = b43_shm_read16(dev, B43_SHM_SHARED, 0x310 + i);
270 power_vector |= (tmp << (i * 8));
271 /* Clear the vector on the device. */
272 b43_shm_write16(dev, B43_SHM_SHARED, 0x310 + i, 0);
273 }
274 if (power_vector)
275 lo->power_vector = power_vector;
276 lo->pwr_vec_read_time = jiffies;
277 }
278
279 /* 802.11/LO/GPHY/MeasuringGains */
280 static void lo_measure_gain_values(struct b43_wldev *dev,
281 s16 max_rx_gain, int use_trsw_rx)
282 {
283 struct b43_phy *phy = &dev->phy;
284 struct b43_phy_g *gphy = phy->g;
285 u16 tmp;
286
287 if (max_rx_gain < 0)
288 max_rx_gain = 0;
289
290 if (has_loopback_gain(phy)) {
291 int trsw_rx_gain;
292
293 if (use_trsw_rx) {
294 trsw_rx_gain = gphy->trsw_rx_gain / 2;
295 if (max_rx_gain >= trsw_rx_gain) {
296 trsw_rx_gain = max_rx_gain - trsw_rx_gain;
297 }
298 } else
299 trsw_rx_gain = max_rx_gain;
300 if (trsw_rx_gain < 9) {
301 gphy->lna_lod_gain = 0;
302 } else {
303 gphy->lna_lod_gain = 1;
304 trsw_rx_gain -= 8;
305 }
306 trsw_rx_gain = clamp_val(trsw_rx_gain, 0, 0x2D);
307 gphy->pga_gain = trsw_rx_gain / 3;
308 if (gphy->pga_gain >= 5) {
309 gphy->pga_gain -= 5;
310 gphy->lna_gain = 2;
311 } else
312 gphy->lna_gain = 0;
313 } else {
314 gphy->lna_gain = 0;
315 gphy->trsw_rx_gain = 0x20;
316 if (max_rx_gain >= 0x14) {
317 gphy->lna_lod_gain = 1;
318 gphy->pga_gain = 2;
319 } else if (max_rx_gain >= 0x12) {
320 gphy->lna_lod_gain = 1;
321 gphy->pga_gain = 1;
322 } else if (max_rx_gain >= 0xF) {
323 gphy->lna_lod_gain = 1;
324 gphy->pga_gain = 0;
325 } else {
326 gphy->lna_lod_gain = 0;
327 gphy->pga_gain = 0;
328 }
329 }
330
331 tmp = b43_radio_read16(dev, 0x7A);
332 if (gphy->lna_lod_gain == 0)
333 tmp &= ~0x0008;
334 else
335 tmp |= 0x0008;
336 b43_radio_write16(dev, 0x7A, tmp);
337 }
338
339 struct lo_g_saved_values {
340 u8 old_channel;
341
342 /* Core registers */
343 u16 reg_3F4;
344 u16 reg_3E2;
345
346 /* PHY registers */
347 u16 phy_lo_mask;
348 u16 phy_extg_01;
349 u16 phy_dacctl_hwpctl;
350 u16 phy_dacctl;
351 u16 phy_cck_14;
352 u16 phy_hpwr_tssictl;
353 u16 phy_analogover;
354 u16 phy_analogoverval;
355 u16 phy_rfover;
356 u16 phy_rfoverval;
357 u16 phy_classctl;
358 u16 phy_cck_3E;
359 u16 phy_crs0;
360 u16 phy_pgactl;
361 u16 phy_cck_2A;
362 u16 phy_syncctl;
363 u16 phy_cck_30;
364 u16 phy_cck_06;
365
366 /* Radio registers */
367 u16 radio_43;
368 u16 radio_7A;
369 u16 radio_52;
370 };
371
372 static void lo_measure_setup(struct b43_wldev *dev,
373 struct lo_g_saved_values *sav)
374 {
375 struct ssb_sprom *sprom = dev->dev->bus_sprom;
376 struct b43_phy *phy = &dev->phy;
377 struct b43_phy_g *gphy = phy->g;
378 struct b43_txpower_lo_control *lo = gphy->lo_control;
379 u16 tmp;
380
381 if (b43_has_hardware_pctl(dev)) {
382 sav->phy_lo_mask = b43_phy_read(dev, B43_PHY_LO_MASK);
383 sav->phy_extg_01 = b43_phy_read(dev, B43_PHY_EXTG(0x01));
384 sav->phy_dacctl_hwpctl = b43_phy_read(dev, B43_PHY_DACCTL);
385 sav->phy_cck_14 = b43_phy_read(dev, B43_PHY_CCK(0x14));
386 sav->phy_hpwr_tssictl = b43_phy_read(dev, B43_PHY_HPWR_TSSICTL);
387
388 b43_phy_set(dev, B43_PHY_HPWR_TSSICTL, 0x100);
389 b43_phy_set(dev, B43_PHY_EXTG(0x01), 0x40);
390 b43_phy_set(dev, B43_PHY_DACCTL, 0x40);
391 b43_phy_set(dev, B43_PHY_CCK(0x14), 0x200);
392 }
393 if (phy->type == B43_PHYTYPE_B &&
394 phy->radio_ver == 0x2050 && phy->radio_rev < 6) {
395 b43_phy_write(dev, B43_PHY_CCK(0x16), 0x410);
396 b43_phy_write(dev, B43_PHY_CCK(0x17), 0x820);
397 }
398 if (phy->rev >= 2) {
399 sav->phy_analogover = b43_phy_read(dev, B43_PHY_ANALOGOVER);
400 sav->phy_analogoverval =
401 b43_phy_read(dev, B43_PHY_ANALOGOVERVAL);
402 sav->phy_rfover = b43_phy_read(dev, B43_PHY_RFOVER);
403 sav->phy_rfoverval = b43_phy_read(dev, B43_PHY_RFOVERVAL);
404 sav->phy_classctl = b43_phy_read(dev, B43_PHY_CLASSCTL);
405 sav->phy_cck_3E = b43_phy_read(dev, B43_PHY_CCK(0x3E));
406 sav->phy_crs0 = b43_phy_read(dev, B43_PHY_CRS0);
407
408 b43_phy_mask(dev, B43_PHY_CLASSCTL, 0xFFFC);
409 b43_phy_mask(dev, B43_PHY_CRS0, 0x7FFF);
410 b43_phy_set(dev, B43_PHY_ANALOGOVER, 0x0003);
411 b43_phy_mask(dev, B43_PHY_ANALOGOVERVAL, 0xFFFC);
412 if (phy->type == B43_PHYTYPE_G) {
413 if ((phy->rev >= 7) &&
414 (sprom->boardflags_lo & B43_BFL_EXTLNA)) {
415 b43_phy_write(dev, B43_PHY_RFOVER, 0x933);
416 } else {
417 b43_phy_write(dev, B43_PHY_RFOVER, 0x133);
418 }
419 } else {
420 b43_phy_write(dev, B43_PHY_RFOVER, 0);
421 }
422 b43_phy_write(dev, B43_PHY_CCK(0x3E), 0);
423 }
424 sav->reg_3F4 = b43_read16(dev, 0x3F4);
425 sav->reg_3E2 = b43_read16(dev, 0x3E2);
426 sav->radio_43 = b43_radio_read16(dev, 0x43);
427 sav->radio_7A = b43_radio_read16(dev, 0x7A);
428 sav->phy_pgactl = b43_phy_read(dev, B43_PHY_PGACTL);
429 sav->phy_cck_2A = b43_phy_read(dev, B43_PHY_CCK(0x2A));
430 sav->phy_syncctl = b43_phy_read(dev, B43_PHY_SYNCCTL);
431 sav->phy_dacctl = b43_phy_read(dev, B43_PHY_DACCTL);
432
433 if (!has_tx_magnification(phy)) {
434 sav->radio_52 = b43_radio_read16(dev, 0x52);
435 sav->radio_52 &= 0x00F0;
436 }
437 if (phy->type == B43_PHYTYPE_B) {
438 sav->phy_cck_30 = b43_phy_read(dev, B43_PHY_CCK(0x30));
439 sav->phy_cck_06 = b43_phy_read(dev, B43_PHY_CCK(0x06));
440 b43_phy_write(dev, B43_PHY_CCK(0x30), 0x00FF);
441 b43_phy_write(dev, B43_PHY_CCK(0x06), 0x3F3F);
442 } else {
443 b43_write16(dev, 0x3E2, b43_read16(dev, 0x3E2)
444 | 0x8000);
445 }
446 b43_write16(dev, 0x3F4, b43_read16(dev, 0x3F4)
447 & 0xF000);
448
449 tmp =
450 (phy->type == B43_PHYTYPE_G) ? B43_PHY_LO_MASK : B43_PHY_CCK(0x2E);
451 b43_phy_write(dev, tmp, 0x007F);
452
453 tmp = sav->phy_syncctl;
454 b43_phy_write(dev, B43_PHY_SYNCCTL, tmp & 0xFF7F);
455 tmp = sav->radio_7A;
456 b43_radio_write16(dev, 0x007A, tmp & 0xFFF0);
457
458 b43_phy_write(dev, B43_PHY_CCK(0x2A), 0x8A3);
459 if (phy->type == B43_PHYTYPE_G ||
460 (phy->type == B43_PHYTYPE_B &&
461 phy->radio_ver == 0x2050 && phy->radio_rev >= 6)) {
462 b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x1003);
463 } else
464 b43_phy_write(dev, B43_PHY_CCK(0x2B), 0x0802);
465 if (phy->rev >= 2)
466 b43_dummy_transmission(dev, false, true);
467 b43_gphy_channel_switch(dev, 6, 0);
468 b43_radio_read16(dev, 0x51); /* dummy read */
469 if (phy->type == B43_PHYTYPE_G)
470 b43_phy_write(dev, B43_PHY_CCK(0x2F), 0);
471
472 /* Re-measure the txctl values, if needed. */
473 if (time_before(lo->txctl_measured_time,
474 jiffies - B43_LO_TXCTL_EXPIRE))
475 lo_measure_txctl_values(dev);
476
477 if (phy->type == B43_PHYTYPE_G && phy->rev >= 3) {
478 b43_phy_write(dev, B43_PHY_LO_MASK, 0xC078);
479 } else {
480 if (phy->type == B43_PHYTYPE_B)
481 b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078);
482 else
483 b43_phy_write(dev, B43_PHY_LO_MASK, 0x8078);
484 }
485 }
486
487 static void lo_measure_restore(struct b43_wldev *dev,
488 struct lo_g_saved_values *sav)
489 {
490 struct b43_phy *phy = &dev->phy;
491 struct b43_phy_g *gphy = phy->g;
492 u16 tmp;
493
494 if (phy->rev >= 2) {
495 b43_phy_write(dev, B43_PHY_PGACTL, 0xE300);
496 tmp = (gphy->pga_gain << 8);
497 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA0);
498 udelay(5);
499 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA2);
500 udelay(2);
501 b43_phy_write(dev, B43_PHY_RFOVERVAL, tmp | 0xA3);
502 } else {
503 tmp = (gphy->pga_gain | 0xEFA0);
504 b43_phy_write(dev, B43_PHY_PGACTL, tmp);
505 }
506 if (phy->type == B43_PHYTYPE_G) {
507 if (phy->rev >= 3)
508 b43_phy_write(dev, B43_PHY_CCK(0x2E), 0xC078);
509 else
510 b43_phy_write(dev, B43_PHY_CCK(0x2E), 0x8078);
511 if (phy->rev >= 2)
512 b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0202);
513 else
514 b43_phy_write(dev, B43_PHY_CCK(0x2F), 0x0101);
515 }
516 b43_write16(dev, 0x3F4, sav->reg_3F4);
517 b43_phy_write(dev, B43_PHY_PGACTL, sav->phy_pgactl);
518 b43_phy_write(dev, B43_PHY_CCK(0x2A), sav->phy_cck_2A);
519 b43_phy_write(dev, B43_PHY_SYNCCTL, sav->phy_syncctl);
520 b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl);
521 b43_radio_write16(dev, 0x43, sav->radio_43);
522 b43_radio_write16(dev, 0x7A, sav->radio_7A);
523 if (!has_tx_magnification(phy)) {
524 tmp = sav->radio_52;
525 b43_radio_maskset(dev, 0x52, 0xFF0F, tmp);
526 }
527 b43_write16(dev, 0x3E2, sav->reg_3E2);
528 if (phy->type == B43_PHYTYPE_B &&
529 phy->radio_ver == 0x2050 && phy->radio_rev <= 5) {
530 b43_phy_write(dev, B43_PHY_CCK(0x30), sav->phy_cck_30);
531 b43_phy_write(dev, B43_PHY_CCK(0x06), sav->phy_cck_06);
532 }
533 if (phy->rev >= 2) {
534 b43_phy_write(dev, B43_PHY_ANALOGOVER, sav->phy_analogover);
535 b43_phy_write(dev, B43_PHY_ANALOGOVERVAL,
536 sav->phy_analogoverval);
537 b43_phy_write(dev, B43_PHY_CLASSCTL, sav->phy_classctl);
538 b43_phy_write(dev, B43_PHY_RFOVER, sav->phy_rfover);
539 b43_phy_write(dev, B43_PHY_RFOVERVAL, sav->phy_rfoverval);
540 b43_phy_write(dev, B43_PHY_CCK(0x3E), sav->phy_cck_3E);
541 b43_phy_write(dev, B43_PHY_CRS0, sav->phy_crs0);
542 }
543 if (b43_has_hardware_pctl(dev)) {
544 tmp = (sav->phy_lo_mask & 0xBFFF);
545 b43_phy_write(dev, B43_PHY_LO_MASK, tmp);
546 b43_phy_write(dev, B43_PHY_EXTG(0x01), sav->phy_extg_01);
547 b43_phy_write(dev, B43_PHY_DACCTL, sav->phy_dacctl_hwpctl);
548 b43_phy_write(dev, B43_PHY_CCK(0x14), sav->phy_cck_14);
549 b43_phy_write(dev, B43_PHY_HPWR_TSSICTL, sav->phy_hpwr_tssictl);
550 }
551 b43_gphy_channel_switch(dev, sav->old_channel, 1);
552 }
553
554 struct b43_lo_g_statemachine {
555 int current_state;
556 int nr_measured;
557 int state_val_multiplier;
558 u16 lowest_feedth;
559 struct b43_loctl min_loctl;
560 };
561
562 /* Loop over each possible value in this state. */
563 static int lo_probe_possible_loctls(struct b43_wldev *dev,
564 struct b43_loctl *probe_loctl,
565 struct b43_lo_g_statemachine *d)
566 {
567 struct b43_phy *phy = &dev->phy;
568 struct b43_phy_g *gphy = phy->g;
569 struct b43_loctl test_loctl;
570 struct b43_loctl orig_loctl;
571 struct b43_loctl prev_loctl = {
572 .i = -100,
573 .q = -100,
574 };
575 int i;
576 int begin, end;
577 int found_lower = 0;
578 u16 feedth;
579
580 static const struct b43_loctl modifiers[] = {
581 {.i = 1,.q = 1,},
582 {.i = 1,.q = 0,},
583 {.i = 1,.q = -1,},
584 {.i = 0,.q = -1,},
585 {.i = -1,.q = -1,},
586 {.i = -1,.q = 0,},
587 {.i = -1,.q = 1,},
588 {.i = 0,.q = 1,},
589 };
590
591 if (d->current_state == 0) {
592 begin = 1;
593 end = 8;
594 } else if (d->current_state % 2 == 0) {
595 begin = d->current_state - 1;
596 end = d->current_state + 1;
597 } else {
598 begin = d->current_state - 2;
599 end = d->current_state + 2;
600 }
601 if (begin < 1)
602 begin += 8;
603 if (end > 8)
604 end -= 8;
605
606 memcpy(&orig_loctl, probe_loctl, sizeof(struct b43_loctl));
607 i = begin;
608 d->current_state = i;
609 while (1) {
610 B43_WARN_ON(!(i >= 1 && i <= 8));
611 memcpy(&test_loctl, &orig_loctl, sizeof(struct b43_loctl));
612 test_loctl.i += modifiers[i - 1].i * d->state_val_multiplier;
613 test_loctl.q += modifiers[i - 1].q * d->state_val_multiplier;
614 if ((test_loctl.i != prev_loctl.i ||
615 test_loctl.q != prev_loctl.q) &&
616 (abs(test_loctl.i) <= 16 && abs(test_loctl.q) <= 16)) {
617 b43_lo_write(dev, &test_loctl);
618 feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
619 gphy->pga_gain,
620 gphy->trsw_rx_gain);
621 if (feedth < d->lowest_feedth) {
622 memcpy(probe_loctl, &test_loctl,
623 sizeof(struct b43_loctl));
624 found_lower = 1;
625 d->lowest_feedth = feedth;
626 if ((d->nr_measured < 2) &&
627 !has_loopback_gain(phy))
628 break;
629 }
630 }
631 memcpy(&prev_loctl, &test_loctl, sizeof(prev_loctl));
632 if (i == end)
633 break;
634 if (i == 8)
635 i = 1;
636 else
637 i++;
638 d->current_state = i;
639 }
640
641 return found_lower;
642 }
643
644 static void lo_probe_loctls_statemachine(struct b43_wldev *dev,
645 struct b43_loctl *loctl,
646 int *max_rx_gain)
647 {
648 struct b43_phy *phy = &dev->phy;
649 struct b43_phy_g *gphy = phy->g;
650 struct b43_lo_g_statemachine d;
651 u16 feedth;
652 int found_lower;
653 struct b43_loctl probe_loctl;
654 int max_repeat = 1, repeat_cnt = 0;
655
656 d.nr_measured = 0;
657 d.state_val_multiplier = 1;
658 if (has_loopback_gain(phy))
659 d.state_val_multiplier = 3;
660
661 memcpy(&d.min_loctl, loctl, sizeof(struct b43_loctl));
662 if (has_loopback_gain(phy))
663 max_repeat = 4;
664 do {
665 b43_lo_write(dev, &d.min_loctl);
666 feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
667 gphy->pga_gain,
668 gphy->trsw_rx_gain);
669 if (feedth < 0x258) {
670 if (feedth >= 0x12C)
671 *max_rx_gain += 6;
672 else
673 *max_rx_gain += 3;
674 feedth = lo_measure_feedthrough(dev, gphy->lna_gain,
675 gphy->pga_gain,
676 gphy->trsw_rx_gain);
677 }
678 d.lowest_feedth = feedth;
679
680 d.current_state = 0;
681 do {
682 B43_WARN_ON(!
683 (d.current_state >= 0
684 && d.current_state <= 8));
685 memcpy(&probe_loctl, &d.min_loctl,
686 sizeof(struct b43_loctl));
687 found_lower =
688 lo_probe_possible_loctls(dev, &probe_loctl, &d);
689 if (!found_lower)
690 break;
691 if ((probe_loctl.i == d.min_loctl.i) &&
692 (probe_loctl.q == d.min_loctl.q))
693 break;
694 memcpy(&d.min_loctl, &probe_loctl,
695 sizeof(struct b43_loctl));
696 d.nr_measured++;
697 } while (d.nr_measured < 24);
698 memcpy(loctl, &d.min_loctl, sizeof(struct b43_loctl));
699
700 if (has_loopback_gain(phy)) {
701 if (d.lowest_feedth > 0x1194)
702 *max_rx_gain -= 6;
703 else if (d.lowest_feedth < 0x5DC)
704 *max_rx_gain += 3;
705 if (repeat_cnt == 0) {
706 if (d.lowest_feedth <= 0x5DC) {
707 d.state_val_multiplier = 1;
708 repeat_cnt++;
709 } else
710 d.state_val_multiplier = 2;
711 } else if (repeat_cnt == 2)
712 d.state_val_multiplier = 1;
713 }
714 lo_measure_gain_values(dev, *max_rx_gain,
715 has_loopback_gain(phy));
716 } while (++repeat_cnt < max_repeat);
717 }
718
719 static
720 struct b43_lo_calib *b43_calibrate_lo_setting(struct b43_wldev *dev,
721 const struct b43_bbatt *bbatt,
722 const struct b43_rfatt *rfatt)
723 {
724 struct b43_phy *phy = &dev->phy;
725 struct b43_phy_g *gphy = phy->g;
726 struct b43_loctl loctl = {
727 .i = 0,
728 .q = 0,
729 };
730 int max_rx_gain;
731 struct b43_lo_calib *cal;
732 struct lo_g_saved_values saved_regs;
733 /* Values from the "TXCTL Register and Value Table" */
734 u16 txctl_reg;
735 u16 txctl_value;
736 u16 pad_mix_gain;
737
738 saved_regs.old_channel = phy->channel;
739 b43_mac_suspend(dev);
740 lo_measure_setup(dev, &saved_regs);
741
742 txctl_reg = lo_txctl_register_table(dev, &txctl_value, &pad_mix_gain);
743
744 b43_radio_maskset(dev, 0x43, 0xFFF0, rfatt->att);
745 b43_radio_maskset(dev, txctl_reg, ~txctl_value, (rfatt->with_padmix ? txctl_value :0));
746
747 max_rx_gain = rfatt->att * 2;
748 max_rx_gain += bbatt->att / 2;
749 if (rfatt->with_padmix)
750 max_rx_gain -= pad_mix_gain;
751 if (has_loopback_gain(phy))
752 max_rx_gain += gphy->max_lb_gain;
753 lo_measure_gain_values(dev, max_rx_gain,
754 has_loopback_gain(phy));
755
756 b43_gphy_set_baseband_attenuation(dev, bbatt->att);
757 lo_probe_loctls_statemachine(dev, &loctl, &max_rx_gain);
758
759 lo_measure_restore(dev, &saved_regs);
760 b43_mac_enable(dev);
761
762 if (b43_debug(dev, B43_DBG_LO)) {
763 b43dbg(dev->wl, "LO: Calibrated for BB(%u), RF(%u,%u) "
764 "=> I=%d Q=%d\n",
765 bbatt->att, rfatt->att, rfatt->with_padmix,
766 loctl.i, loctl.q);
767 }
768
769 cal = kmalloc(sizeof(*cal), GFP_KERNEL);
770 if (!cal) {
771 b43warn(dev->wl, "LO calib: out of memory\n");
772 return NULL;
773 }
774 memcpy(&cal->bbatt, bbatt, sizeof(*bbatt));
775 memcpy(&cal->rfatt, rfatt, sizeof(*rfatt));
776 memcpy(&cal->ctl, &loctl, sizeof(loctl));
777 cal->calib_time = jiffies;
778 INIT_LIST_HEAD(&cal->list);
779
780 return cal;
781 }
782
783 /* Get a calibrated LO setting for the given attenuation values.
784 * Might return a NULL pointer under OOM! */
785 static
786 struct b43_lo_calib *b43_get_calib_lo_settings(struct b43_wldev *dev,
787 const struct b43_bbatt *bbatt,
788 const struct b43_rfatt *rfatt)
789 {
790 struct b43_txpower_lo_control *lo = dev->phy.g->lo_control;
791 struct b43_lo_calib *c;
792
793 c = b43_find_lo_calib(lo, bbatt, rfatt);
794 if (c)
795 return c;
796 /* Not in the list of calibrated LO settings.
797 * Calibrate it now. */
798 c = b43_calibrate_lo_setting(dev, bbatt, rfatt);
799 if (!c)
800 return NULL;
801 list_add(&c->list, &lo->calib_list);
802
803 return c;
804 }
805
806 void b43_gphy_dc_lt_init(struct b43_wldev *dev, bool update_all)
807 {
808 struct b43_phy *phy = &dev->phy;
809 struct b43_phy_g *gphy = phy->g;
810 struct b43_txpower_lo_control *lo = gphy->lo_control;
811 int i;
812 int rf_offset, bb_offset;
813 const struct b43_rfatt *rfatt;
814 const struct b43_bbatt *bbatt;
815 u64 power_vector;
816 bool table_changed = false;
817
818 BUILD_BUG_ON(B43_DC_LT_SIZE != 32);
819 B43_WARN_ON(lo->rfatt_list.len * lo->bbatt_list.len > 64);
820
821 power_vector = lo->power_vector;
822 if (!update_all && !power_vector)
823 return; /* Nothing to do. */
824
825 /* Suspend the MAC now to avoid continuous suspend/enable
826 * cycles in the loop. */
827 b43_mac_suspend(dev);
828
829 for (i = 0; i < B43_DC_LT_SIZE * 2; i++) {
830 struct b43_lo_calib *cal;
831 int idx;
832 u16 val;
833
834 if (!update_all && !(power_vector & (((u64)1ULL) << i)))
835 continue;
836 /* Update the table entry for this power_vector bit.
837 * The table rows are RFatt entries and columns are BBatt. */
838 bb_offset = i / lo->rfatt_list.len;
839 rf_offset = i % lo->rfatt_list.len;
840 bbatt = &(lo->bbatt_list.list[bb_offset]);
841 rfatt = &(lo->rfatt_list.list[rf_offset]);
842
843 cal = b43_calibrate_lo_setting(dev, bbatt, rfatt);
844 if (!cal) {
845 b43warn(dev->wl, "LO: Could not "
846 "calibrate DC table entry\n");
847 continue;
848 }
849 /*FIXME: Is Q really in the low nibble? */
850 val = (u8)(cal->ctl.q);
851 val |= ((u8)(cal->ctl.i)) << 4;
852 kfree(cal);
853
854 /* Get the index into the hardware DC LT. */
855 idx = i / 2;
856 /* Change the table in memory. */
857 if (i % 2) {
858 /* Change the high byte. */
859 lo->dc_lt[idx] = (lo->dc_lt[idx] & 0x00FF)
860 | ((val & 0x00FF) << 8);
861 } else {
862 /* Change the low byte. */
863 lo->dc_lt[idx] = (lo->dc_lt[idx] & 0xFF00)
864 | (val & 0x00FF);
865 }
866 table_changed = true;
867 }
868 if (table_changed) {
869 /* The table changed in memory. Update the hardware table. */
870 for (i = 0; i < B43_DC_LT_SIZE; i++)
871 b43_phy_write(dev, 0x3A0 + i, lo->dc_lt[i]);
872 }
873 b43_mac_enable(dev);
874 }
875
876 /* Fixup the RF attenuation value for the case where we are
877 * using the PAD mixer. */
878 static inline void b43_lo_fixup_rfatt(struct b43_rfatt *rf)
879 {
880 if (!rf->with_padmix)
881 return;
882 if ((rf->att != 1) && (rf->att != 2) && (rf->att != 3))
883 rf->att = 4;
884 }
885
886 void b43_lo_g_adjust(struct b43_wldev *dev)
887 {
888 struct b43_phy_g *gphy = dev->phy.g;
889 struct b43_lo_calib *cal;
890 struct b43_rfatt rf;
891
892 memcpy(&rf, &gphy->rfatt, sizeof(rf));
893 b43_lo_fixup_rfatt(&rf);
894
895 cal = b43_get_calib_lo_settings(dev, &gphy->bbatt, &rf);
896 if (!cal)
897 return;
898 b43_lo_write(dev, &cal->ctl);
899 }
900
901 void b43_lo_g_adjust_to(struct b43_wldev *dev,
902 u16 rfatt, u16 bbatt, u16 tx_control)
903 {
904 struct b43_rfatt rf;
905 struct b43_bbatt bb;
906 struct b43_lo_calib *cal;
907
908 memset(&rf, 0, sizeof(rf));
909 memset(&bb, 0, sizeof(bb));
910 rf.att = rfatt;
911 bb.att = bbatt;
912 b43_lo_fixup_rfatt(&rf);
913 cal = b43_get_calib_lo_settings(dev, &bb, &rf);
914 if (!cal)
915 return;
916 b43_lo_write(dev, &cal->ctl);
917 }
918
919 /* Periodic LO maintenance work */
920 void b43_lo_g_maintenance_work(struct b43_wldev *dev)
921 {
922 struct b43_phy *phy = &dev->phy;
923 struct b43_phy_g *gphy = phy->g;
924 struct b43_txpower_lo_control *lo = gphy->lo_control;
925 unsigned long now;
926 unsigned long expire;
927 struct b43_lo_calib *cal, *tmp;
928 bool current_item_expired = false;
929 bool hwpctl;
930
931 if (!lo)
932 return;
933 now = jiffies;
934 hwpctl = b43_has_hardware_pctl(dev);
935
936 if (hwpctl) {
937 /* Read the power vector and update it, if needed. */
938 expire = now - B43_LO_PWRVEC_EXPIRE;
939 if (time_before(lo->pwr_vec_read_time, expire)) {
940 lo_read_power_vector(dev);
941 b43_gphy_dc_lt_init(dev, 0);
942 }
943 //FIXME Recalc the whole DC table from time to time?
944 }
945
946 if (hwpctl)
947 return;
948 /* Search for expired LO settings. Remove them.
949 * Recalibrate the current setting, if expired. */
950 expire = now - B43_LO_CALIB_EXPIRE;
951 list_for_each_entry_safe(cal, tmp, &lo->calib_list, list) {
952 if (!time_before(cal->calib_time, expire))
953 continue;
954 /* This item expired. */
955 if (b43_compare_bbatt(&cal->bbatt, &gphy->bbatt) &&
956 b43_compare_rfatt(&cal->rfatt, &gphy->rfatt)) {
957 B43_WARN_ON(current_item_expired);
958 current_item_expired = true;
959 }
960 if (b43_debug(dev, B43_DBG_LO)) {
961 b43dbg(dev->wl, "LO: Item BB(%u), RF(%u,%u), "
962 "I=%d, Q=%d expired\n",
963 cal->bbatt.att, cal->rfatt.att,
964 cal->rfatt.with_padmix,
965 cal->ctl.i, cal->ctl.q);
966 }
967 list_del(&cal->list);
968 kfree(cal);
969 }
970 if (current_item_expired || unlikely(list_empty(&lo->calib_list))) {
971 /* Recalibrate currently used LO setting. */
972 if (b43_debug(dev, B43_DBG_LO))
973 b43dbg(dev->wl, "LO: Recalibrating current LO setting\n");
974 cal = b43_calibrate_lo_setting(dev, &gphy->bbatt, &gphy->rfatt);
975 if (cal) {
976 list_add(&cal->list, &lo->calib_list);
977 b43_lo_write(dev, &cal->ctl);
978 } else
979 b43warn(dev->wl, "Failed to recalibrate current LO setting\n");
980 }
981 }
982
983 void b43_lo_g_cleanup(struct b43_wldev *dev)
984 {
985 struct b43_txpower_lo_control *lo = dev->phy.g->lo_control;
986 struct b43_lo_calib *cal, *tmp;
987
988 if (!lo)
989 return;
990 list_for_each_entry_safe(cal, tmp, &lo->calib_list, list) {
991 list_del(&cal->list);
992 kfree(cal);
993 }
994 }
995
996 /* LO Initialization */
997 void b43_lo_g_init(struct b43_wldev *dev)
998 {
999 if (b43_has_hardware_pctl(dev)) {
1000 lo_read_power_vector(dev);
1001 b43_gphy_dc_lt_init(dev, 1);
1002 }
1003 }
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