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sched: Remove double_rq_lock() from __migrate_task()
[linux/fpc-iii.git] / drivers / media / dvb-frontends / lgs8gxx.c
blob3c92f36ea5c7a287261eba1d34f5bff7c7eb0b47
1 /*
2 * Support for Legend Silicon GB20600 (a.k.a DMB-TH) demodulator
3 * LGS8913, LGS8GL5, LGS8G75
4 * experimental support LGS8G42, LGS8G52
5 *
6 * Copyright (C) 2007-2009 David T.L. Wong <davidtlwong@gmail.com>
7 * Copyright (C) 2008 Sirius International (Hong Kong) Limited
8 * Timothy Lee <timothy.lee@siriushk.com> (for initial work on LGS8GL5)
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 *
24 */
25
26 #include <asm/div64.h>
27 #include <linux/firmware.h>
28
29 #include "dvb_frontend.h"
30
31 #include "lgs8gxx.h"
32 #include "lgs8gxx_priv.h"
33
34 #define dprintk(args...) \
35 do { \
36 if (debug) \
37 printk(KERN_DEBUG "lgs8gxx: " args); \
38 } while (0)
39
40 static int debug;
41 static int fake_signal_str = 1;
42
43 #define LGS8GXX_FIRMWARE "lgs8g75.fw"
44
45 module_param(debug, int, 0644);
46 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
47
48 module_param(fake_signal_str, int, 0644);
49 MODULE_PARM_DESC(fake_signal_str, "fake signal strength for LGS8913."
50 "Signal strength calculation is slow.(default:on).");
51
52 /* LGS8GXX internal helper functions */
53
54 static int lgs8gxx_write_reg(struct lgs8gxx_state *priv, u8 reg, u8 data)
55 {
56 int ret;
57 u8 buf[] = { reg, data };
58 struct i2c_msg msg = { .flags = 0, .buf = buf, .len = 2 };
59
60 msg.addr = priv->config->demod_address;
61 if (priv->config->prod != LGS8GXX_PROD_LGS8G75 && reg >= 0xC0)
62 msg.addr += 0x02;
63
64 if (debug >= 2)
65 dprintk("%s: reg=0x%02X, data=0x%02X\n", __func__, reg, data);
66
67 ret = i2c_transfer(priv->i2c, &msg, 1);
68
69 if (ret != 1)
70 dprintk("%s: error reg=0x%x, data=0x%x, ret=%i\n",
71 __func__, reg, data, ret);
72
73 return (ret != 1) ? -1 : 0;
74 }
75
76 static int lgs8gxx_read_reg(struct lgs8gxx_state *priv, u8 reg, u8 *p_data)
77 {
78 int ret;
79 u8 dev_addr;
80
81 u8 b0[] = { reg };
82 u8 b1[] = { 0 };
83 struct i2c_msg msg[] = {
84 { .flags = 0, .buf = b0, .len = 1 },
85 { .flags = I2C_M_RD, .buf = b1, .len = 1 },
86 };
87
88 dev_addr = priv->config->demod_address;
89 if (priv->config->prod != LGS8GXX_PROD_LGS8G75 && reg >= 0xC0)
90 dev_addr += 0x02;
91 msg[1].addr = msg[0].addr = dev_addr;
92
93 ret = i2c_transfer(priv->i2c, msg, 2);
94 if (ret != 2) {
95 dprintk("%s: error reg=0x%x, ret=%i\n", __func__, reg, ret);
96 return -1;
97 }
98
99 *p_data = b1[0];
100 if (debug >= 2)
101 dprintk("%s: reg=0x%02X, data=0x%02X\n", __func__, reg, b1[0]);
102 return 0;
103 }
104
105 static int lgs8gxx_soft_reset(struct lgs8gxx_state *priv)
106 {
107 lgs8gxx_write_reg(priv, 0x02, 0x00);
108 msleep(1);
109 lgs8gxx_write_reg(priv, 0x02, 0x01);
110 msleep(100);
111
112 return 0;
113 }
114
115 static int wait_reg_mask(struct lgs8gxx_state *priv, u8 reg, u8 mask,
116 u8 val, u8 delay, u8 tries)
117 {
118 u8 t;
119 int i;
120
121 for (i = 0; i < tries; i++) {
122 lgs8gxx_read_reg(priv, reg, &t);
123
124 if ((t & mask) == val)
125 return 0;
126 msleep(delay);
127 }
128
129 return 1;
130 }
131
132 static int lgs8gxx_set_ad_mode(struct lgs8gxx_state *priv)
133 {
134 const struct lgs8gxx_config *config = priv->config;
135 u8 if_conf;
136
137 if_conf = 0x10; /* AGC output on, RF_AGC output off; */
138
139 if_conf |=
140 ((config->ext_adc) ? 0x80 : 0x00) |
141 ((config->if_neg_center) ? 0x04 : 0x00) |
142 ((config->if_freq == 0) ? 0x08 : 0x00) | /* Baseband */
143 ((config->adc_signed) ? 0x02 : 0x00) |
144 ((config->if_neg_edge) ? 0x01 : 0x00);
145
146 if (config->ext_adc &&
147 (config->prod == LGS8GXX_PROD_LGS8G52)) {
148 lgs8gxx_write_reg(priv, 0xBA, 0x40);
149 }
150
151 lgs8gxx_write_reg(priv, 0x07, if_conf);
152
153 return 0;
154 }
155
156 static int lgs8gxx_set_if_freq(struct lgs8gxx_state *priv, u32 freq /*in kHz*/)
157 {
158 u64 val;
159 u32 v32;
160 u32 if_clk;
161
162 if_clk = priv->config->if_clk_freq;
163
164 val = freq;
165 if (freq != 0) {
166 val <<= 32;
167 if (if_clk != 0)
168 do_div(val, if_clk);
169 v32 = val & 0xFFFFFFFF;
170 dprintk("Set IF Freq to %dkHz\n", freq);
171 } else {
172 v32 = 0;
173 dprintk("Set IF Freq to baseband\n");
174 }
175 dprintk("AFC_INIT_FREQ = 0x%08X\n", v32);
176
177 if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
178 lgs8gxx_write_reg(priv, 0x08, 0xFF & (v32));
179 lgs8gxx_write_reg(priv, 0x09, 0xFF & (v32 >> 8));
180 lgs8gxx_write_reg(priv, 0x0A, 0xFF & (v32 >> 16));
181 lgs8gxx_write_reg(priv, 0x0B, 0xFF & (v32 >> 24));
182 } else {
183 lgs8gxx_write_reg(priv, 0x09, 0xFF & (v32));
184 lgs8gxx_write_reg(priv, 0x0A, 0xFF & (v32 >> 8));
185 lgs8gxx_write_reg(priv, 0x0B, 0xFF & (v32 >> 16));
186 lgs8gxx_write_reg(priv, 0x0C, 0xFF & (v32 >> 24));
187 }
188
189 return 0;
190 }
191
192 static int lgs8gxx_get_afc_phase(struct lgs8gxx_state *priv)
193 {
194 u64 val;
195 u32 v32 = 0;
196 u8 reg_addr, t;
197 int i;
198
199 if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
200 reg_addr = 0x23;
201 else
202 reg_addr = 0x48;
203
204 for (i = 0; i < 4; i++) {
205 lgs8gxx_read_reg(priv, reg_addr, &t);
206 v32 <<= 8;
207 v32 |= t;
208 reg_addr--;
209 }
210
211 val = v32;
212 val *= priv->config->if_clk_freq;
213 val >>= 32;
214 dprintk("AFC = %u kHz\n", (u32)val);
215 return 0;
216 }
217
218 static int lgs8gxx_set_mode_auto(struct lgs8gxx_state *priv)
219 {
220 u8 t;
221 u8 prod = priv->config->prod;
222
223 if (prod == LGS8GXX_PROD_LGS8913)
224 lgs8gxx_write_reg(priv, 0xC6, 0x01);
225
226 if (prod == LGS8GXX_PROD_LGS8G75) {
227 lgs8gxx_read_reg(priv, 0x0C, &t);
228 t &= (~0x04);
229 lgs8gxx_write_reg(priv, 0x0C, t | 0x80);
230 lgs8gxx_write_reg(priv, 0x39, 0x00);
231 lgs8gxx_write_reg(priv, 0x3D, 0x04);
232 } else if (prod == LGS8GXX_PROD_LGS8913 ||
233 prod == LGS8GXX_PROD_LGS8GL5 ||
234 prod == LGS8GXX_PROD_LGS8G42 ||
235 prod == LGS8GXX_PROD_LGS8G52 ||
236 prod == LGS8GXX_PROD_LGS8G54) {
237 lgs8gxx_read_reg(priv, 0x7E, &t);
238 lgs8gxx_write_reg(priv, 0x7E, t | 0x01);
239
240 /* clear FEC self reset */
241 lgs8gxx_read_reg(priv, 0xC5, &t);
242 lgs8gxx_write_reg(priv, 0xC5, t & 0xE0);
243 }
244
245 if (prod == LGS8GXX_PROD_LGS8913) {
246 /* FEC auto detect */
247 lgs8gxx_write_reg(priv, 0xC1, 0x03);
248
249 lgs8gxx_read_reg(priv, 0x7C, &t);
250 t = (t & 0x8C) | 0x03;
251 lgs8gxx_write_reg(priv, 0x7C, t);
252
253 /* BER test mode */
254 lgs8gxx_read_reg(priv, 0xC3, &t);
255 t = (t & 0xEF) | 0x10;
256 lgs8gxx_write_reg(priv, 0xC3, t);
257 }
258
259 if (priv->config->prod == LGS8GXX_PROD_LGS8G52)
260 lgs8gxx_write_reg(priv, 0xD9, 0x40);
261
262 return 0;
263 }
264
265 static int lgs8gxx_set_mode_manual(struct lgs8gxx_state *priv)
266 {
267 u8 t;
268
269 if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
270 u8 t2;
271 lgs8gxx_read_reg(priv, 0x0C, &t);
272 t &= (~0x80);
273 lgs8gxx_write_reg(priv, 0x0C, t);
274
275 lgs8gxx_read_reg(priv, 0x0C, &t);
276 lgs8gxx_read_reg(priv, 0x19, &t2);
277
278 if (((t&0x03) == 0x01) && (t2&0x01)) {
279 lgs8gxx_write_reg(priv, 0x6E, 0x05);
280 lgs8gxx_write_reg(priv, 0x39, 0x02);
281 lgs8gxx_write_reg(priv, 0x39, 0x03);
282 lgs8gxx_write_reg(priv, 0x3D, 0x05);
283 lgs8gxx_write_reg(priv, 0x3E, 0x28);
284 lgs8gxx_write_reg(priv, 0x53, 0x80);
285 } else {
286 lgs8gxx_write_reg(priv, 0x6E, 0x3F);
287 lgs8gxx_write_reg(priv, 0x39, 0x00);
288 lgs8gxx_write_reg(priv, 0x3D, 0x04);
289 }
290
291 lgs8gxx_soft_reset(priv);
292 return 0;
293 }
294
295 /* turn off auto-detect; manual settings */
296 lgs8gxx_write_reg(priv, 0x7E, 0);
297 if (priv->config->prod == LGS8GXX_PROD_LGS8913)
298 lgs8gxx_write_reg(priv, 0xC1, 0);
299
300 lgs8gxx_read_reg(priv, 0xC5, &t);
301 t = (t & 0xE0) | 0x06;
302 lgs8gxx_write_reg(priv, 0xC5, t);
303
304 lgs8gxx_soft_reset(priv);
305
306 return 0;
307 }
308
309 static int lgs8gxx_is_locked(struct lgs8gxx_state *priv, u8 *locked)
310 {
311 int ret = 0;
312 u8 t;
313
314 if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
315 ret = lgs8gxx_read_reg(priv, 0x13, &t);
316 else
317 ret = lgs8gxx_read_reg(priv, 0x4B, &t);
318 if (ret != 0)
319 return ret;
320
321 if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
322 *locked = ((t & 0x80) == 0x80) ? 1 : 0;
323 else
324 *locked = ((t & 0xC0) == 0xC0) ? 1 : 0;
325 return 0;
326 }
327
328 /* Wait for Code Acquisition Lock */
329 static int lgs8gxx_wait_ca_lock(struct lgs8gxx_state *priv, u8 *locked)
330 {
331 int ret = 0;
332 u8 reg, mask, val;
333
334 if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
335 reg = 0x13;
336 mask = 0x80;
337 val = 0x80;
338 } else {
339 reg = 0x4B;
340 mask = 0xC0;
341 val = 0xC0;
342 }
343
344 ret = wait_reg_mask(priv, reg, mask, val, 50, 40);
345 *locked = (ret == 0) ? 1 : 0;
346
347 return 0;
348 }
349
350 static int lgs8gxx_is_autodetect_finished(struct lgs8gxx_state *priv,
351 u8 *finished)
352 {
353 int ret = 0;
354 u8 reg, mask, val;
355
356 if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
357 reg = 0x1f;
358 mask = 0xC0;
359 val = 0x80;
360 } else {
361 reg = 0xA4;
362 mask = 0x03;
363 val = 0x01;
364 }
365
366 ret = wait_reg_mask(priv, reg, mask, val, 10, 20);
367 *finished = (ret == 0) ? 1 : 0;
368
369 return 0;
370 }
371
372 static int lgs8gxx_autolock_gi(struct lgs8gxx_state *priv, u8 gi, u8 cpn,
373 u8 *locked)
374 {
375 int err = 0;
376 u8 ad_fini = 0;
377 u8 t1, t2;
378
379 if (gi == GI_945)
380 dprintk("try GI 945\n");
381 else if (gi == GI_595)
382 dprintk("try GI 595\n");
383 else if (gi == GI_420)
384 dprintk("try GI 420\n");
385 if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
386 lgs8gxx_read_reg(priv, 0x0C, &t1);
387 lgs8gxx_read_reg(priv, 0x18, &t2);
388 t1 &= ~(GI_MASK);
389 t1 |= gi;
390 t2 &= 0xFE;
391 t2 |= cpn ? 0x01 : 0x00;
392 lgs8gxx_write_reg(priv, 0x0C, t1);
393 lgs8gxx_write_reg(priv, 0x18, t2);
394 } else {
395 lgs8gxx_write_reg(priv, 0x04, gi);
396 }
397 lgs8gxx_soft_reset(priv);
398 err = lgs8gxx_wait_ca_lock(priv, locked);
399 if (err || !(*locked))
400 return err;
401 err = lgs8gxx_is_autodetect_finished(priv, &ad_fini);
402 if (err != 0)
403 return err;
404 if (ad_fini) {
405 dprintk("auto detect finished\n");
406 } else
407 *locked = 0;
408
409 return 0;
410 }
411
412 static int lgs8gxx_auto_detect(struct lgs8gxx_state *priv,
413 u8 *detected_param, u8 *gi)
414 {
415 int i, j;
416 int err = 0;
417 u8 locked = 0, tmp_gi;
418
419 dprintk("%s\n", __func__);
420
421 lgs8gxx_set_mode_auto(priv);
422 if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
423 lgs8gxx_write_reg(priv, 0x67, 0xAA);
424 lgs8gxx_write_reg(priv, 0x6E, 0x3F);
425 } else {
426 /* Guard Interval */
427 lgs8gxx_write_reg(priv, 0x03, 00);
428 }
429
430 for (i = 0; i < 2; i++) {
431 for (j = 0; j < 2; j++) {
432 tmp_gi = GI_945;
433 err = lgs8gxx_autolock_gi(priv, GI_945, j, &locked);
434 if (err)
435 goto out;
436 if (locked)
437 goto locked;
438 }
439 for (j = 0; j < 2; j++) {
440 tmp_gi = GI_420;
441 err = lgs8gxx_autolock_gi(priv, GI_420, j, &locked);
442 if (err)
443 goto out;
444 if (locked)
445 goto locked;
446 }
447 tmp_gi = GI_595;
448 err = lgs8gxx_autolock_gi(priv, GI_595, 1, &locked);
449 if (err)
450 goto out;
451 if (locked)
452 goto locked;
453 }
454
455 locked:
456 if ((err == 0) && (locked == 1)) {
457 u8 t;
458
459 if (priv->config->prod != LGS8GXX_PROD_LGS8G75) {
460 lgs8gxx_read_reg(priv, 0xA2, &t);
461 *detected_param = t;
462 } else {
463 lgs8gxx_read_reg(priv, 0x1F, &t);
464 *detected_param = t & 0x3F;
465 }
466
467 if (tmp_gi == GI_945)
468 dprintk("GI 945 locked\n");
469 else if (tmp_gi == GI_595)
470 dprintk("GI 595 locked\n");
471 else if (tmp_gi == GI_420)
472 dprintk("GI 420 locked\n");
473 *gi = tmp_gi;
474 }
475 if (!locked)
476 err = -1;
477
478 out:
479 return err;
480 }
481
482 static void lgs8gxx_auto_lock(struct lgs8gxx_state *priv)
483 {
484 s8 err;
485 u8 gi = 0x2;
486 u8 detected_param = 0;
487
488 err = lgs8gxx_auto_detect(priv, &detected_param, &gi);
489
490 if (err != 0) {
491 dprintk("lgs8gxx_auto_detect failed\n");
492 } else
493 dprintk("detected param = 0x%02X\n", detected_param);
494
495 /* Apply detected parameters */
496 if (priv->config->prod == LGS8GXX_PROD_LGS8913) {
497 u8 inter_leave_len = detected_param & TIM_MASK ;
498 /* Fix 8913 time interleaver detection bug */
499 inter_leave_len = (inter_leave_len == TIM_MIDDLE) ? 0x60 : 0x40;
500 detected_param &= CF_MASK | SC_MASK | LGS_FEC_MASK;
501 detected_param |= inter_leave_len;
502 }
503 if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
504 u8 t;
505 lgs8gxx_read_reg(priv, 0x19, &t);
506 t &= 0x81;
507 t |= detected_param << 1;
508 lgs8gxx_write_reg(priv, 0x19, t);
509 } else {
510 lgs8gxx_write_reg(priv, 0x7D, detected_param);
511 if (priv->config->prod == LGS8GXX_PROD_LGS8913)
512 lgs8gxx_write_reg(priv, 0xC0, detected_param);
513 }
514 /* lgs8gxx_soft_reset(priv); */
515
516 /* Enter manual mode */
517 lgs8gxx_set_mode_manual(priv);
518
519 switch (gi) {
520 case GI_945:
521 priv->curr_gi = 945; break;
522 case GI_595:
523 priv->curr_gi = 595; break;
524 case GI_420:
525 priv->curr_gi = 420; break;
526 default:
527 priv->curr_gi = 945; break;
528 }
529 }
530
531 static int lgs8gxx_set_mpeg_mode(struct lgs8gxx_state *priv,
532 u8 serial, u8 clk_pol, u8 clk_gated)
533 {
534 int ret = 0;
535 u8 t, reg_addr;
536
537 reg_addr = (priv->config->prod == LGS8GXX_PROD_LGS8G75) ? 0x30 : 0xC2;
538 ret = lgs8gxx_read_reg(priv, reg_addr, &t);
539 if (ret != 0)
540 return ret;
541
542 t &= 0xF8;
543 t |= serial ? TS_SERIAL : TS_PARALLEL;
544 t |= clk_pol ? TS_CLK_INVERTED : TS_CLK_NORMAL;
545 t |= clk_gated ? TS_CLK_GATED : TS_CLK_FREERUN;
546
547 ret = lgs8gxx_write_reg(priv, reg_addr, t);
548 if (ret != 0)
549 return ret;
550
551 return 0;
552 }
553
554 /* A/D input peak-to-peak voltage range */
555 static int lgs8g75_set_adc_vpp(struct lgs8gxx_state *priv,
556 u8 sel)
557 {
558 u8 r26 = 0x73, r27 = 0x90;
559
560 if (priv->config->prod != LGS8GXX_PROD_LGS8G75)
561 return 0;
562
563 r26 |= (sel & 0x01) << 7;
564 r27 |= (sel & 0x02) >> 1;
565 lgs8gxx_write_reg(priv, 0x26, r26);
566 lgs8gxx_write_reg(priv, 0x27, r27);
567
568 return 0;
569 }
570
571 /* LGS8913 demod frontend functions */
572
573 static int lgs8913_init(struct lgs8gxx_state *priv)
574 {
575 u8 t;
576
577 /* LGS8913 specific */
578 lgs8gxx_write_reg(priv, 0xc1, 0x3);
579
580 lgs8gxx_read_reg(priv, 0x7c, &t);
581 lgs8gxx_write_reg(priv, 0x7c, (t&0x8c) | 0x3);
582
583 /* LGS8913 specific */
584 lgs8gxx_read_reg(priv, 0xc3, &t);
585 lgs8gxx_write_reg(priv, 0xc3, t&0x10);
586
587
588 return 0;
589 }
590
591 static int lgs8g75_init_data(struct lgs8gxx_state *priv)
592 {
593 const struct firmware *fw;
594 int rc;
595 int i;
596
597 rc = request_firmware(&fw, LGS8GXX_FIRMWARE, &priv->i2c->dev);
598 if (rc)
599 return rc;
600
601 lgs8gxx_write_reg(priv, 0xC6, 0x40);
602
603 lgs8gxx_write_reg(priv, 0x3D, 0x04);
604 lgs8gxx_write_reg(priv, 0x39, 0x00);
605
606 lgs8gxx_write_reg(priv, 0x3A, 0x00);
607 lgs8gxx_write_reg(priv, 0x38, 0x00);
608 lgs8gxx_write_reg(priv, 0x3B, 0x00);
609 lgs8gxx_write_reg(priv, 0x38, 0x00);
610
611 for (i = 0; i < fw->size; i++) {
612 lgs8gxx_write_reg(priv, 0x38, 0x00);
613 lgs8gxx_write_reg(priv, 0x3A, (u8)(i&0xff));
614 lgs8gxx_write_reg(priv, 0x3B, (u8)(i>>8));
615 lgs8gxx_write_reg(priv, 0x3C, fw->data[i]);
616 }
617
618 lgs8gxx_write_reg(priv, 0x38, 0x00);
619
620 release_firmware(fw);
621 return 0;
622 }
623
624 static int lgs8gxx_init(struct dvb_frontend *fe)
625 {
626 struct lgs8gxx_state *priv =
627 (struct lgs8gxx_state *)fe->demodulator_priv;
628 const struct lgs8gxx_config *config = priv->config;
629 u8 data = 0;
630 s8 err;
631 dprintk("%s\n", __func__);
632
633 lgs8gxx_read_reg(priv, 0, &data);
634 dprintk("reg 0 = 0x%02X\n", data);
635
636 if (config->prod == LGS8GXX_PROD_LGS8G75)
637 lgs8g75_set_adc_vpp(priv, config->adc_vpp);
638
639 /* Setup MPEG output format */
640 err = lgs8gxx_set_mpeg_mode(priv, config->serial_ts,
641 config->ts_clk_pol,
642 config->ts_clk_gated);
643 if (err != 0)
644 return -EIO;
645
646 if (config->prod == LGS8GXX_PROD_LGS8913)
647 lgs8913_init(priv);
648 lgs8gxx_set_if_freq(priv, priv->config->if_freq);
649 lgs8gxx_set_ad_mode(priv);
650
651 return 0;
652 }
653
654 static void lgs8gxx_release(struct dvb_frontend *fe)
655 {
656 struct lgs8gxx_state *state = fe->demodulator_priv;
657 dprintk("%s\n", __func__);
658
659 kfree(state);
660 }
661
662
663 static int lgs8gxx_write(struct dvb_frontend *fe, const u8 buf[], int len)
664 {
665 struct lgs8gxx_state *priv = fe->demodulator_priv;
666
667 if (len != 2)
668 return -EINVAL;
669
670 return lgs8gxx_write_reg(priv, buf[0], buf[1]);
671 }
672
673 static int lgs8gxx_set_fe(struct dvb_frontend *fe)
674 {
675
676 struct lgs8gxx_state *priv = fe->demodulator_priv;
677
678 dprintk("%s\n", __func__);
679
680 /* set frequency */
681 if (fe->ops.tuner_ops.set_params) {
682 fe->ops.tuner_ops.set_params(fe);
683 if (fe->ops.i2c_gate_ctrl)
684 fe->ops.i2c_gate_ctrl(fe, 0);
685 }
686
687 /* start auto lock */
688 lgs8gxx_auto_lock(priv);
689
690 msleep(10);
691
692 return 0;
693 }
694
695 static int lgs8gxx_get_fe(struct dvb_frontend *fe)
696 {
697 struct dtv_frontend_properties *fe_params = &fe->dtv_property_cache;
698 dprintk("%s\n", __func__);
699
700 /* TODO: get real readings from device */
701 /* inversion status */
702 fe_params->inversion = INVERSION_OFF;
703
704 /* bandwidth */
705 fe_params->bandwidth_hz = 8000000;
706
707 fe_params->code_rate_HP = FEC_AUTO;
708 fe_params->code_rate_LP = FEC_AUTO;
709
710 fe_params->modulation = QAM_AUTO;
711
712 /* transmission mode */
713 fe_params->transmission_mode = TRANSMISSION_MODE_AUTO;
714
715 /* guard interval */
716 fe_params->guard_interval = GUARD_INTERVAL_AUTO;
717
718 /* hierarchy */
719 fe_params->hierarchy = HIERARCHY_NONE;
720
721 return 0;
722 }
723
724 static
725 int lgs8gxx_get_tune_settings(struct dvb_frontend *fe,
726 struct dvb_frontend_tune_settings *fesettings)
727 {
728 /* FIXME: copy from tda1004x.c */
729 fesettings->min_delay_ms = 800;
730 fesettings->step_size = 0;
731 fesettings->max_drift = 0;
732 return 0;
733 }
734
735 static int lgs8gxx_read_status(struct dvb_frontend *fe, fe_status_t *fe_status)
736 {
737 struct lgs8gxx_state *priv = fe->demodulator_priv;
738 s8 ret;
739 u8 t, locked = 0;
740
741 dprintk("%s\n", __func__);
742 *fe_status = 0;
743
744 lgs8gxx_get_afc_phase(priv);
745 lgs8gxx_is_locked(priv, &locked);
746 if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
747 if (locked)
748 *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
749 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
750 return 0;
751 }
752
753 ret = lgs8gxx_read_reg(priv, 0x4B, &t);
754 if (ret != 0)
755 return -EIO;
756
757 dprintk("Reg 0x4B: 0x%02X\n", t);
758
759 *fe_status = 0;
760 if (priv->config->prod == LGS8GXX_PROD_LGS8913) {
761 if ((t & 0x40) == 0x40)
762 *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER;
763 if ((t & 0x80) == 0x80)
764 *fe_status |= FE_HAS_VITERBI | FE_HAS_SYNC |
765 FE_HAS_LOCK;
766 } else {
767 if ((t & 0x80) == 0x80)
768 *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
769 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
770 }
771
772 /* success */
773 dprintk("%s: fe_status=0x%x\n", __func__, *fe_status);
774 return 0;
775 }
776
777 static int lgs8gxx_read_signal_agc(struct lgs8gxx_state *priv, u16 *signal)
778 {
779 u16 v;
780 u8 agc_lvl[2], cat;
781
782 dprintk("%s()\n", __func__);
783 lgs8gxx_read_reg(priv, 0x3F, &agc_lvl[0]);
784 lgs8gxx_read_reg(priv, 0x3E, &agc_lvl[1]);
785
786 v = agc_lvl[0];
787 v <<= 8;
788 v |= agc_lvl[1];
789
790 dprintk("agc_lvl: 0x%04X\n", v);
791
792 if (v < 0x100)
793 cat = 0;
794 else if (v < 0x190)
795 cat = 5;
796 else if (v < 0x2A8)
797 cat = 4;
798 else if (v < 0x381)
799 cat = 3;
800 else if (v < 0x400)
801 cat = 2;
802 else if (v == 0x400)
803 cat = 1;
804 else
805 cat = 0;
806
807 *signal = cat * 65535 / 5;
808
809 return 0;
810 }
811
812 static int lgs8913_read_signal_strength(struct lgs8gxx_state *priv, u16 *signal)
813 {
814 u8 t; s8 ret;
815 s16 max_strength = 0;
816 u8 str;
817 u16 i, gi = priv->curr_gi;
818
819 dprintk("%s\n", __func__);
820
821 ret = lgs8gxx_read_reg(priv, 0x4B, &t);
822 if (ret != 0)
823 return -EIO;
824
825 if (fake_signal_str) {
826 if ((t & 0xC0) == 0xC0) {
827 dprintk("Fake signal strength\n");
828 *signal = 0x7FFF;
829 } else
830 *signal = 0;
831 return 0;
832 }
833
834 dprintk("gi = %d\n", gi);
835 for (i = 0; i < gi; i++) {
836
837 if ((i & 0xFF) == 0)
838 lgs8gxx_write_reg(priv, 0x84, 0x03 & (i >> 8));
839 lgs8gxx_write_reg(priv, 0x83, i & 0xFF);
840
841 lgs8gxx_read_reg(priv, 0x94, &str);
842 if (max_strength < str)
843 max_strength = str;
844 }
845
846 *signal = max_strength;
847 dprintk("%s: signal=0x%02X\n", __func__, *signal);
848
849 lgs8gxx_read_reg(priv, 0x95, &t);
850 dprintk("%s: AVG Noise=0x%02X\n", __func__, t);
851
852 return 0;
853 }
854
855 static int lgs8g75_read_signal_strength(struct lgs8gxx_state *priv, u16 *signal)
856 {
857 u8 t;
858 s16 v = 0;
859
860 dprintk("%s\n", __func__);
861
862 lgs8gxx_read_reg(priv, 0xB1, &t);
863 v |= t;
864 v <<= 8;
865 lgs8gxx_read_reg(priv, 0xB0, &t);
866 v |= t;
867
868 *signal = v;
869 dprintk("%s: signal=0x%02X\n", __func__, *signal);
870
871 return 0;
872 }
873
874 static int lgs8gxx_read_signal_strength(struct dvb_frontend *fe, u16 *signal)
875 {
876 struct lgs8gxx_state *priv = fe->demodulator_priv;
877
878 if (priv->config->prod == LGS8GXX_PROD_LGS8913)
879 return lgs8913_read_signal_strength(priv, signal);
880 else if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
881 return lgs8g75_read_signal_strength(priv, signal);
882 else
883 return lgs8gxx_read_signal_agc(priv, signal);
884 }
885
886 static int lgs8gxx_read_snr(struct dvb_frontend *fe, u16 *snr)
887 {
888 struct lgs8gxx_state *priv = fe->demodulator_priv;
889 u8 t;
890 *snr = 0;
891
892 if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
893 lgs8gxx_read_reg(priv, 0x34, &t);
894 else
895 lgs8gxx_read_reg(priv, 0x95, &t);
896 dprintk("AVG Noise=0x%02X\n", t);
897 *snr = 256 - t;
898 *snr <<= 8;
899 dprintk("snr=0x%x\n", *snr);
900
901 return 0;
902 }
903
904 static int lgs8gxx_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
905 {
906 *ucblocks = 0;
907 dprintk("%s: ucblocks=0x%x\n", __func__, *ucblocks);
908 return 0;
909 }
910
911 static void packet_counter_start(struct lgs8gxx_state *priv)
912 {
913 u8 orig, t;
914
915 if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
916 lgs8gxx_read_reg(priv, 0x30, &orig);
917 orig &= 0xE7;
918 t = orig | 0x10;
919 lgs8gxx_write_reg(priv, 0x30, t);
920 t = orig | 0x18;
921 lgs8gxx_write_reg(priv, 0x30, t);
922 t = orig | 0x10;
923 lgs8gxx_write_reg(priv, 0x30, t);
924 } else {
925 lgs8gxx_write_reg(priv, 0xC6, 0x01);
926 lgs8gxx_write_reg(priv, 0xC6, 0x41);
927 lgs8gxx_write_reg(priv, 0xC6, 0x01);
928 }
929 }
930
931 static void packet_counter_stop(struct lgs8gxx_state *priv)
932 {
933 u8 t;
934
935 if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
936 lgs8gxx_read_reg(priv, 0x30, &t);
937 t &= 0xE7;
938 lgs8gxx_write_reg(priv, 0x30, t);
939 } else {
940 lgs8gxx_write_reg(priv, 0xC6, 0x81);
941 }
942 }
943
944 static int lgs8gxx_read_ber(struct dvb_frontend *fe, u32 *ber)
945 {
946 struct lgs8gxx_state *priv = fe->demodulator_priv;
947 u8 reg_err, reg_total, t;
948 u32 total_cnt = 0, err_cnt = 0;
949 int i;
950
951 dprintk("%s\n", __func__);
952
953 packet_counter_start(priv);
954 msleep(200);
955 packet_counter_stop(priv);
956
957 if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
958 reg_total = 0x28; reg_err = 0x2C;
959 } else {
960 reg_total = 0xD0; reg_err = 0xD4;
961 }
962
963 for (i = 0; i < 4; i++) {
964 total_cnt <<= 8;
965 lgs8gxx_read_reg(priv, reg_total+3-i, &t);
966 total_cnt |= t;
967 }
968 for (i = 0; i < 4; i++) {
969 err_cnt <<= 8;
970 lgs8gxx_read_reg(priv, reg_err+3-i, &t);
971 err_cnt |= t;
972 }
973 dprintk("error=%d total=%d\n", err_cnt, total_cnt);
974
975 if (total_cnt == 0)
976 *ber = 0;
977 else
978 *ber = err_cnt * 100 / total_cnt;
979
980 dprintk("%s: ber=0x%x\n", __func__, *ber);
981 return 0;
982 }
983
984 static int lgs8gxx_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
985 {
986 struct lgs8gxx_state *priv = fe->demodulator_priv;
987
988 if (priv->config->tuner_address == 0)
989 return 0;
990 if (enable) {
991 u8 v = 0x80 | priv->config->tuner_address;
992 return lgs8gxx_write_reg(priv, 0x01, v);
993 }
994 return lgs8gxx_write_reg(priv, 0x01, 0);
995 }
996
997 static struct dvb_frontend_ops lgs8gxx_ops = {
998 .delsys = { SYS_DTMB },
999 .info = {
1000 .name = "Legend Silicon LGS8913/LGS8GXX DMB-TH",
1001 .frequency_min = 474000000,
1002 .frequency_max = 858000000,
1003 .frequency_stepsize = 10000,
1004 .caps =
1005 FE_CAN_FEC_AUTO |
1006 FE_CAN_QAM_AUTO |
1007 FE_CAN_TRANSMISSION_MODE_AUTO |
1008 FE_CAN_GUARD_INTERVAL_AUTO
1009 },
1010
1011 .release = lgs8gxx_release,
1012
1013 .init = lgs8gxx_init,
1014 .write = lgs8gxx_write,
1015 .i2c_gate_ctrl = lgs8gxx_i2c_gate_ctrl,
1016
1017 .set_frontend = lgs8gxx_set_fe,
1018 .get_frontend = lgs8gxx_get_fe,
1019 .get_tune_settings = lgs8gxx_get_tune_settings,
1020
1021 .read_status = lgs8gxx_read_status,
1022 .read_ber = lgs8gxx_read_ber,
1023 .read_signal_strength = lgs8gxx_read_signal_strength,
1024 .read_snr = lgs8gxx_read_snr,
1025 .read_ucblocks = lgs8gxx_read_ucblocks,
1026 };
1027
1028 struct dvb_frontend *lgs8gxx_attach(const struct lgs8gxx_config *config,
1029 struct i2c_adapter *i2c)
1030 {
1031 struct lgs8gxx_state *priv = NULL;
1032 u8 data = 0;
1033
1034 dprintk("%s()\n", __func__);
1035
1036 if (config == NULL || i2c == NULL)
1037 return NULL;
1038
1039 priv = kzalloc(sizeof(struct lgs8gxx_state), GFP_KERNEL);
1040 if (priv == NULL)
1041 goto error_out;
1042
1043 priv->config = config;
1044 priv->i2c = i2c;
1045
1046 /* check if the demod is there */
1047 if (lgs8gxx_read_reg(priv, 0, &data) != 0) {
1048 dprintk("%s lgs8gxx not found at i2c addr 0x%02X\n",
1049 __func__, priv->config->demod_address);
1050 goto error_out;
1051 }
1052
1053 lgs8gxx_read_reg(priv, 1, &data);
1054
1055 memcpy(&priv->frontend.ops, &lgs8gxx_ops,
1056 sizeof(struct dvb_frontend_ops));
1057 priv->frontend.demodulator_priv = priv;
1058
1059 if (config->prod == LGS8GXX_PROD_LGS8G75)
1060 lgs8g75_init_data(priv);
1061
1062 return &priv->frontend;
1063
1064 error_out:
1065 dprintk("%s() error_out\n", __func__);
1066 kfree(priv);
1067 return NULL;
1068
1069 }
1070 EXPORT_SYMBOL(lgs8gxx_attach);
1071
1072 MODULE_DESCRIPTION("Legend Silicon LGS8913/LGS8GXX DMB-TH demodulator driver");
1073 MODULE_AUTHOR("David T. L. Wong <davidtlwong@gmail.com>");
1074 MODULE_LICENSE("GPL");
1075 MODULE_FIRMWARE(LGS8GXX_FIRMWARE);
Linux with added FPC-III support