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