1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Support for Legend Silicon GB20600 (a.k.a DMB-TH) demodulator
4 * LGS8913, LGS8GL5, LGS8G75
5 * experimental support LGS8G42, LGS8G52
6 *
7 * Copyright (C) 2007-2009 David T.L. Wong <davidtlwong@gmail.com>
8 * Copyright (C) 2008 Sirius International (Hong Kong) Limited
9 * Timothy Lee <timothy.lee@siriushk.com> (for initial work on LGS8GL5)
10 */
11
12 #include <asm/div64.h>
13 #include <linux/firmware.h>
14
15 #include <media/dvb_frontend.h>
16
17 #include "lgs8gxx.h"
18 #include "lgs8gxx_priv.h"
19
20 #define dprintk(args...) \
21 do { \
22 if (debug) \
23 printk(KERN_DEBUG "lgs8gxx: " args); \
24 } while (0)
25
26 static int debug;
27 static int fake_signal_str = 1;
28
29 #define LGS8GXX_FIRMWARE "lgs8g75.fw"
30
31 module_param(debug, int, 0644);
32 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
33
34 module_param(fake_signal_str, int, 0644);
35 MODULE_PARM_DESC(fake_signal_str, "fake signal strength for LGS8913."
36 "Signal strength calculation is slow.(default:on).");
37
38 /* LGS8GXX internal helper functions */
39
lgs8gxx_write_reg(struct lgs8gxx_state * priv,u8 reg,u8 data)40 static int lgs8gxx_write_reg(struct lgs8gxx_state *priv, u8 reg, u8 data)
41 {
42 int ret;
43 u8 buf[] = { reg, data };
44 struct i2c_msg msg = { .flags = 0, .buf = buf, .len = 2 };
45
46 msg.addr = priv->config->demod_address;
47 if (priv->config->prod != LGS8GXX_PROD_LGS8G75 && reg >= 0xC0)
48 msg.addr += 0x02;
49
50 if (debug >= 2)
51 dprintk("%s: reg=0x%02X, data=0x%02X\n", __func__, reg, data);
52
53 ret = i2c_transfer(priv->i2c, &msg, 1);
54
55 if (ret != 1)
56 dprintk("%s: error reg=0x%x, data=0x%x, ret=%i\n",
57 __func__, reg, data, ret);
58
59 return (ret != 1) ? -1 : 0;
60 }
61
lgs8gxx_read_reg(struct lgs8gxx_state * priv,u8 reg,u8 * p_data)62 static int lgs8gxx_read_reg(struct lgs8gxx_state *priv, u8 reg, u8 *p_data)
63 {
64 int ret;
65 u8 dev_addr;
66
67 u8 b0[] = { reg };
68 u8 b1[] = { 0 };
69 struct i2c_msg msg[] = {
70 { .flags = 0, .buf = b0, .len = 1 },
71 { .flags = I2C_M_RD, .buf = b1, .len = 1 },
72 };
73
74 dev_addr = priv->config->demod_address;
75 if (priv->config->prod != LGS8GXX_PROD_LGS8G75 && reg >= 0xC0)
76 dev_addr += 0x02;
77 msg[1].addr = msg[0].addr = dev_addr;
78
79 ret = i2c_transfer(priv->i2c, msg, 2);
80 if (ret != 2) {
81 dprintk("%s: error reg=0x%x, ret=%i\n", __func__, reg, ret);
82 return -1;
83 }
84
85 *p_data = b1[0];
86 if (debug >= 2)
87 dprintk("%s: reg=0x%02X, data=0x%02X\n", __func__, reg, b1[0]);
88 return 0;
89 }
90
lgs8gxx_soft_reset(struct lgs8gxx_state * priv)91 static int lgs8gxx_soft_reset(struct lgs8gxx_state *priv)
92 {
93 lgs8gxx_write_reg(priv, 0x02, 0x00);
94 msleep(1);
95 lgs8gxx_write_reg(priv, 0x02, 0x01);
96 msleep(100);
97
98 return 0;
99 }
100
wait_reg_mask(struct lgs8gxx_state * priv,u8 reg,u8 mask,u8 val,u8 delay,u8 tries)101 static int wait_reg_mask(struct lgs8gxx_state *priv, u8 reg, u8 mask,
102 u8 val, u8 delay, u8 tries)
103 {
104 u8 t;
105 int i;
106
107 for (i = 0; i < tries; i++) {
108 lgs8gxx_read_reg(priv, reg, &t);
109
110 if ((t & mask) == val)
111 return 0;
112 msleep(delay);
113 }
114
115 return 1;
116 }
117
lgs8gxx_set_ad_mode(struct lgs8gxx_state * priv)118 static int lgs8gxx_set_ad_mode(struct lgs8gxx_state *priv)
119 {
120 const struct lgs8gxx_config *config = priv->config;
121 u8 if_conf;
122
123 if_conf = 0x10; /* AGC output on, RF_AGC output off; */
124
125 if_conf |=
126 ((config->ext_adc) ? 0x80 : 0x00) |
127 ((config->if_neg_center) ? 0x04 : 0x00) |
128 ((config->if_freq == 0) ? 0x08 : 0x00) | /* Baseband */
129 ((config->adc_signed) ? 0x02 : 0x00) |
130 ((config->if_neg_edge) ? 0x01 : 0x00);
131
132 if (config->ext_adc &&
133 (config->prod == LGS8GXX_PROD_LGS8G52)) {
134 lgs8gxx_write_reg(priv, 0xBA, 0x40);
135 }
136
137 lgs8gxx_write_reg(priv, 0x07, if_conf);
138
139 return 0;
140 }
141
lgs8gxx_set_if_freq(struct lgs8gxx_state * priv,u32 freq)142 static int lgs8gxx_set_if_freq(struct lgs8gxx_state *priv, u32 freq /*in kHz*/)
143 {
144 u64 val;
145 u32 v32;
146 u32 if_clk;
147
148 if_clk = priv->config->if_clk_freq;
149
150 val = freq;
151 if (freq != 0) {
152 val <<= 32;
153 if (if_clk != 0)
154 do_div(val, if_clk);
155 v32 = val & 0xFFFFFFFF;
156 dprintk("Set IF Freq to %dkHz\n", freq);
157 } else {
158 v32 = 0;
159 dprintk("Set IF Freq to baseband\n");
160 }
161 dprintk("AFC_INIT_FREQ = 0x%08X\n", v32);
162
163 if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
164 lgs8gxx_write_reg(priv, 0x08, 0xFF & (v32));
165 lgs8gxx_write_reg(priv, 0x09, 0xFF & (v32 >> 8));
166 lgs8gxx_write_reg(priv, 0x0A, 0xFF & (v32 >> 16));
167 lgs8gxx_write_reg(priv, 0x0B, 0xFF & (v32 >> 24));
168 } else {
169 lgs8gxx_write_reg(priv, 0x09, 0xFF & (v32));
170 lgs8gxx_write_reg(priv, 0x0A, 0xFF & (v32 >> 8));
171 lgs8gxx_write_reg(priv, 0x0B, 0xFF & (v32 >> 16));
172 lgs8gxx_write_reg(priv, 0x0C, 0xFF & (v32 >> 24));
173 }
174
175 return 0;
176 }
177
lgs8gxx_get_afc_phase(struct lgs8gxx_state * priv)178 static int lgs8gxx_get_afc_phase(struct lgs8gxx_state *priv)
179 {
180 u64 val;
181 u32 v32 = 0;
182 u8 reg_addr, t;
183 int i;
184
185 if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
186 reg_addr = 0x23;
187 else
188 reg_addr = 0x48;
189
190 for (i = 0; i < 4; i++) {
191 lgs8gxx_read_reg(priv, reg_addr, &t);
192 v32 <<= 8;
193 v32 |= t;
194 reg_addr--;
195 }
196
197 val = v32;
198 val *= priv->config->if_clk_freq;
199 val >>= 32;
200 dprintk("AFC = %u kHz\n", (u32)val);
201 return 0;
202 }
203
lgs8gxx_set_mode_auto(struct lgs8gxx_state * priv)204 static int lgs8gxx_set_mode_auto(struct lgs8gxx_state *priv)
205 {
206 u8 t;
207 u8 prod = priv->config->prod;
208
209 if (prod == LGS8GXX_PROD_LGS8913)
210 lgs8gxx_write_reg(priv, 0xC6, 0x01);
211
212 if (prod == LGS8GXX_PROD_LGS8G75) {
213 lgs8gxx_read_reg(priv, 0x0C, &t);
214 t &= (~0x04);
215 lgs8gxx_write_reg(priv, 0x0C, t | 0x80);
216 lgs8gxx_write_reg(priv, 0x39, 0x00);
217 lgs8gxx_write_reg(priv, 0x3D, 0x04);
218 } else if (prod == LGS8GXX_PROD_LGS8913 ||
219 prod == LGS8GXX_PROD_LGS8GL5 ||
220 prod == LGS8GXX_PROD_LGS8G42 ||
221 prod == LGS8GXX_PROD_LGS8G52 ||
222 prod == LGS8GXX_PROD_LGS8G54) {
223 lgs8gxx_read_reg(priv, 0x7E, &t);
224 lgs8gxx_write_reg(priv, 0x7E, t | 0x01);
225
226 /* clear FEC self reset */
227 lgs8gxx_read_reg(priv, 0xC5, &t);
228 lgs8gxx_write_reg(priv, 0xC5, t & 0xE0);
229 }
230
231 if (prod == LGS8GXX_PROD_LGS8913) {
232 /* FEC auto detect */
233 lgs8gxx_write_reg(priv, 0xC1, 0x03);
234
235 lgs8gxx_read_reg(priv, 0x7C, &t);
236 t = (t & 0x8C) | 0x03;
237 lgs8gxx_write_reg(priv, 0x7C, t);
238
239 /* BER test mode */
240 lgs8gxx_read_reg(priv, 0xC3, &t);
241 t = (t & 0xEF) | 0x10;
242 lgs8gxx_write_reg(priv, 0xC3, t);
243 }
244
245 if (priv->config->prod == LGS8GXX_PROD_LGS8G52)
246 lgs8gxx_write_reg(priv, 0xD9, 0x40);
247
248 return 0;
249 }
250
lgs8gxx_set_mode_manual(struct lgs8gxx_state * priv)251 static int lgs8gxx_set_mode_manual(struct lgs8gxx_state *priv)
252 {
253 u8 t;
254
255 if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
256 u8 t2;
257 lgs8gxx_read_reg(priv, 0x0C, &t);
258 t &= (~0x80);
259 lgs8gxx_write_reg(priv, 0x0C, t);
260
261 lgs8gxx_read_reg(priv, 0x0C, &t);
262 lgs8gxx_read_reg(priv, 0x19, &t2);
263
264 if (((t&0x03) == 0x01) && (t2&0x01)) {
265 lgs8gxx_write_reg(priv, 0x6E, 0x05);
266 lgs8gxx_write_reg(priv, 0x39, 0x02);
267 lgs8gxx_write_reg(priv, 0x39, 0x03);
268 lgs8gxx_write_reg(priv, 0x3D, 0x05);
269 lgs8gxx_write_reg(priv, 0x3E, 0x28);
270 lgs8gxx_write_reg(priv, 0x53, 0x80);
271 } else {
272 lgs8gxx_write_reg(priv, 0x6E, 0x3F);
273 lgs8gxx_write_reg(priv, 0x39, 0x00);
274 lgs8gxx_write_reg(priv, 0x3D, 0x04);
275 }
276
277 lgs8gxx_soft_reset(priv);
278 return 0;
279 }
280
281 /* turn off auto-detect; manual settings */
282 lgs8gxx_write_reg(priv, 0x7E, 0);
283 if (priv->config->prod == LGS8GXX_PROD_LGS8913)
284 lgs8gxx_write_reg(priv, 0xC1, 0);
285
286 lgs8gxx_read_reg(priv, 0xC5, &t);
287 t = (t & 0xE0) | 0x06;
288 lgs8gxx_write_reg(priv, 0xC5, t);
289
290 lgs8gxx_soft_reset(priv);
291
292 return 0;
293 }
294
lgs8gxx_is_locked(struct lgs8gxx_state * priv,u8 * locked)295 static int lgs8gxx_is_locked(struct lgs8gxx_state *priv, u8 *locked)
296 {
297 int ret = 0;
298 u8 t;
299
300 if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
301 ret = lgs8gxx_read_reg(priv, 0x13, &t);
302 else
303 ret = lgs8gxx_read_reg(priv, 0x4B, &t);
304 if (ret != 0)
305 return ret;
306
307 if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
308 *locked = ((t & 0x80) == 0x80) ? 1 : 0;
309 else
310 *locked = ((t & 0xC0) == 0xC0) ? 1 : 0;
311 return 0;
312 }
313
314 /* Wait for Code Acquisition Lock */
lgs8gxx_wait_ca_lock(struct lgs8gxx_state * priv,u8 * locked)315 static int lgs8gxx_wait_ca_lock(struct lgs8gxx_state *priv, u8 *locked)
316 {
317 int ret = 0;
318 u8 reg, mask, val;
319
320 if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
321 reg = 0x13;
322 mask = 0x80;
323 val = 0x80;
324 } else {
325 reg = 0x4B;
326 mask = 0xC0;
327 val = 0xC0;
328 }
329
330 ret = wait_reg_mask(priv, reg, mask, val, 50, 40);
331 *locked = (ret == 0) ? 1 : 0;
332
333 return 0;
334 }
335
lgs8gxx_is_autodetect_finished(struct lgs8gxx_state * priv,u8 * finished)336 static int lgs8gxx_is_autodetect_finished(struct lgs8gxx_state *priv,
337 u8 *finished)
338 {
339 int ret = 0;
340 u8 reg, mask, val;
341
342 if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
343 reg = 0x1f;
344 mask = 0xC0;
345 val = 0x80;
346 } else {
347 reg = 0xA4;
348 mask = 0x03;
349 val = 0x01;
350 }
351
352 ret = wait_reg_mask(priv, reg, mask, val, 10, 20);
353 *finished = (ret == 0) ? 1 : 0;
354
355 return 0;
356 }
357
lgs8gxx_autolock_gi(struct lgs8gxx_state * priv,u8 gi,u8 cpn,u8 * locked)358 static int lgs8gxx_autolock_gi(struct lgs8gxx_state *priv, u8 gi, u8 cpn,
359 u8 *locked)
360 {
361 int err = 0;
362 u8 ad_fini = 0;
363 u8 t1, t2;
364
365 if (gi == GI_945)
366 dprintk("try GI 945\n");
367 else if (gi == GI_595)
368 dprintk("try GI 595\n");
369 else if (gi == GI_420)
370 dprintk("try GI 420\n");
371 if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
372 lgs8gxx_read_reg(priv, 0x0C, &t1);
373 lgs8gxx_read_reg(priv, 0x18, &t2);
374 t1 &= ~(GI_MASK);
375 t1 |= gi;
376 t2 &= 0xFE;
377 t2 |= cpn ? 0x01 : 0x00;
378 lgs8gxx_write_reg(priv, 0x0C, t1);
379 lgs8gxx_write_reg(priv, 0x18, t2);
380 } else {
381 lgs8gxx_write_reg(priv, 0x04, gi);
382 }
383 lgs8gxx_soft_reset(priv);
384 err = lgs8gxx_wait_ca_lock(priv, locked);
385 if (err || !(*locked))
386 return err;
387 err = lgs8gxx_is_autodetect_finished(priv, &ad_fini);
388 if (err != 0)
389 return err;
390 if (ad_fini) {
391 dprintk("auto detect finished\n");
392 } else
393 *locked = 0;
394
395 return 0;
396 }
397
lgs8gxx_auto_detect(struct lgs8gxx_state * priv,u8 * detected_param,u8 * gi)398 static int lgs8gxx_auto_detect(struct lgs8gxx_state *priv,
399 u8 *detected_param, u8 *gi)
400 {
401 int i, j;
402 int err = 0;
403 u8 locked = 0, tmp_gi;
404
405 dprintk("%s\n", __func__);
406
407 lgs8gxx_set_mode_auto(priv);
408 if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
409 lgs8gxx_write_reg(priv, 0x67, 0xAA);
410 lgs8gxx_write_reg(priv, 0x6E, 0x3F);
411 } else {
412 /* Guard Interval */
413 lgs8gxx_write_reg(priv, 0x03, 00);
414 }
415
416 for (i = 0; i < 2; i++) {
417 for (j = 0; j < 2; j++) {
418 tmp_gi = GI_945;
419 err = lgs8gxx_autolock_gi(priv, GI_945, j, &locked);
420 if (err)
421 goto out;
422 if (locked)
423 goto locked;
424 }
425 for (j = 0; j < 2; j++) {
426 tmp_gi = GI_420;
427 err = lgs8gxx_autolock_gi(priv, GI_420, j, &locked);
428 if (err)
429 goto out;
430 if (locked)
431 goto locked;
432 }
433 tmp_gi = GI_595;
434 err = lgs8gxx_autolock_gi(priv, GI_595, 1, &locked);
435 if (err)
436 goto out;
437 if (locked)
438 goto locked;
439 }
440
441 locked:
442 if ((err == 0) && (locked == 1)) {
443 u8 t;
444
445 if (priv->config->prod != LGS8GXX_PROD_LGS8G75) {
446 lgs8gxx_read_reg(priv, 0xA2, &t);
447 *detected_param = t;
448 } else {
449 lgs8gxx_read_reg(priv, 0x1F, &t);
450 *detected_param = t & 0x3F;
451 }
452
453 if (tmp_gi == GI_945)
454 dprintk("GI 945 locked\n");
455 else if (tmp_gi == GI_595)
456 dprintk("GI 595 locked\n");
457 else if (tmp_gi == GI_420)
458 dprintk("GI 420 locked\n");
459 *gi = tmp_gi;
460 }
461 if (!locked)
462 err = -1;
463
464 out:
465 return err;
466 }
467
lgs8gxx_auto_lock(struct lgs8gxx_state * priv)468 static void lgs8gxx_auto_lock(struct lgs8gxx_state *priv)
469 {
470 s8 err;
471 u8 gi = 0x2;
472 u8 detected_param = 0;
473
474 err = lgs8gxx_auto_detect(priv, &detected_param, &gi);
475
476 if (err != 0) {
477 dprintk("lgs8gxx_auto_detect failed\n");
478 } else
479 dprintk("detected param = 0x%02X\n", detected_param);
480
481 /* Apply detected parameters */
482 if (priv->config->prod == LGS8GXX_PROD_LGS8913) {
483 u8 inter_leave_len = detected_param & TIM_MASK ;
484 /* Fix 8913 time interleaver detection bug */
485 inter_leave_len = (inter_leave_len == TIM_MIDDLE) ? 0x60 : 0x40;
486 detected_param &= CF_MASK | SC_MASK | LGS_FEC_MASK;
487 detected_param |= inter_leave_len;
488 }
489 if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
490 u8 t;
491 lgs8gxx_read_reg(priv, 0x19, &t);
492 t &= 0x81;
493 t |= detected_param << 1;
494 lgs8gxx_write_reg(priv, 0x19, t);
495 } else {
496 lgs8gxx_write_reg(priv, 0x7D, detected_param);
497 if (priv->config->prod == LGS8GXX_PROD_LGS8913)
498 lgs8gxx_write_reg(priv, 0xC0, detected_param);
499 }
500 /* lgs8gxx_soft_reset(priv); */
501
502 /* Enter manual mode */
503 lgs8gxx_set_mode_manual(priv);
504
505 switch (gi) {
506 case GI_945:
507 priv->curr_gi = 945; break;
508 case GI_595:
509 priv->curr_gi = 595; break;
510 case GI_420:
511 priv->curr_gi = 420; break;
512 default:
513 priv->curr_gi = 945; break;
514 }
515 }
516
lgs8gxx_set_mpeg_mode(struct lgs8gxx_state * priv,u8 serial,u8 clk_pol,u8 clk_gated)517 static int lgs8gxx_set_mpeg_mode(struct lgs8gxx_state *priv,
518 u8 serial, u8 clk_pol, u8 clk_gated)
519 {
520 int ret = 0;
521 u8 t, reg_addr;
522
523 reg_addr = (priv->config->prod == LGS8GXX_PROD_LGS8G75) ? 0x30 : 0xC2;
524 ret = lgs8gxx_read_reg(priv, reg_addr, &t);
525 if (ret != 0)
526 return ret;
527
528 t &= 0xF8;
529 t |= serial ? TS_SERIAL : TS_PARALLEL;
530 t |= clk_pol ? TS_CLK_INVERTED : TS_CLK_NORMAL;
531 t |= clk_gated ? TS_CLK_GATED : TS_CLK_FREERUN;
532
533 ret = lgs8gxx_write_reg(priv, reg_addr, t);
534 if (ret != 0)
535 return ret;
536
537 return 0;
538 }
539
540 /* A/D input peak-to-peak voltage range */
lgs8g75_set_adc_vpp(struct lgs8gxx_state * priv,u8 sel)541 static int lgs8g75_set_adc_vpp(struct lgs8gxx_state *priv,
542 u8 sel)
543 {
544 u8 r26 = 0x73, r27 = 0x90;
545
546 if (priv->config->prod != LGS8GXX_PROD_LGS8G75)
547 return 0;
548
549 r26 |= (sel & 0x01) << 7;
550 r27 |= (sel & 0x02) >> 1;
551 lgs8gxx_write_reg(priv, 0x26, r26);
552 lgs8gxx_write_reg(priv, 0x27, r27);
553
554 return 0;
555 }
556
557 /* LGS8913 demod frontend functions */
558
lgs8913_init(struct lgs8gxx_state * priv)559 static int lgs8913_init(struct lgs8gxx_state *priv)
560 {
561 u8 t;
562
563 /* LGS8913 specific */
564 lgs8gxx_write_reg(priv, 0xc1, 0x3);
565
566 lgs8gxx_read_reg(priv, 0x7c, &t);
567 lgs8gxx_write_reg(priv, 0x7c, (t&0x8c) | 0x3);
568
569 /* LGS8913 specific */
570 lgs8gxx_read_reg(priv, 0xc3, &t);
571 lgs8gxx_write_reg(priv, 0xc3, t&0x10);
572
573
574 return 0;
575 }
576
lgs8g75_init_data(struct lgs8gxx_state * priv)577 static int lgs8g75_init_data(struct lgs8gxx_state *priv)
578 {
579 const struct firmware *fw;
580 int rc;
581 int i;
582
583 rc = request_firmware(&fw, LGS8GXX_FIRMWARE, &priv->i2c->dev);
584 if (rc)
585 return rc;
586
587 lgs8gxx_write_reg(priv, 0xC6, 0x40);
588
589 lgs8gxx_write_reg(priv, 0x3D, 0x04);
590 lgs8gxx_write_reg(priv, 0x39, 0x00);
591
592 lgs8gxx_write_reg(priv, 0x3A, 0x00);
593 lgs8gxx_write_reg(priv, 0x38, 0x00);
594 lgs8gxx_write_reg(priv, 0x3B, 0x00);
595 lgs8gxx_write_reg(priv, 0x38, 0x00);
596
597 for (i = 0; i < fw->size; i++) {
598 lgs8gxx_write_reg(priv, 0x38, 0x00);
599 lgs8gxx_write_reg(priv, 0x3A, (u8)(i&0xff));
600 lgs8gxx_write_reg(priv, 0x3B, (u8)(i>>8));
601 lgs8gxx_write_reg(priv, 0x3C, fw->data[i]);
602 }
603
604 lgs8gxx_write_reg(priv, 0x38, 0x00);
605
606 release_firmware(fw);
607 return 0;
608 }
609
lgs8gxx_init(struct dvb_frontend * fe)610 static int lgs8gxx_init(struct dvb_frontend *fe)
611 {
612 struct lgs8gxx_state *priv =
613 (struct lgs8gxx_state *)fe->demodulator_priv;
614 const struct lgs8gxx_config *config = priv->config;
615 u8 data = 0;
616 s8 err;
617 dprintk("%s\n", __func__);
618
619 lgs8gxx_read_reg(priv, 0, &data);
620 dprintk("reg 0 = 0x%02X\n", data);
621
622 if (config->prod == LGS8GXX_PROD_LGS8G75)
623 lgs8g75_set_adc_vpp(priv, config->adc_vpp);
624
625 /* Setup MPEG output format */
626 err = lgs8gxx_set_mpeg_mode(priv, config->serial_ts,
627 config->ts_clk_pol,
628 config->ts_clk_gated);
629 if (err != 0)
630 return -EIO;
631
632 if (config->prod == LGS8GXX_PROD_LGS8913)
633 lgs8913_init(priv);
634 lgs8gxx_set_if_freq(priv, priv->config->if_freq);
635 lgs8gxx_set_ad_mode(priv);
636
637 return 0;
638 }
639
lgs8gxx_release(struct dvb_frontend * fe)640 static void lgs8gxx_release(struct dvb_frontend *fe)
641 {
642 struct lgs8gxx_state *state = fe->demodulator_priv;
643 dprintk("%s\n", __func__);
644
645 kfree(state);
646 }
647
648
lgs8gxx_write(struct dvb_frontend * fe,const u8 buf[],int len)649 static int lgs8gxx_write(struct dvb_frontend *fe, const u8 buf[], int len)
650 {
651 struct lgs8gxx_state *priv = fe->demodulator_priv;
652
653 if (len != 2)
654 return -EINVAL;
655
656 return lgs8gxx_write_reg(priv, buf[0], buf[1]);
657 }
658
lgs8gxx_set_fe(struct dvb_frontend * fe)659 static int lgs8gxx_set_fe(struct dvb_frontend *fe)
660 {
661 struct dtv_frontend_properties *fe_params = &fe->dtv_property_cache;
662 struct lgs8gxx_state *priv = fe->demodulator_priv;
663
664 dprintk("%s\n", __func__);
665
666 /* set frequency */
667 if (fe->ops.tuner_ops.set_params) {
668 fe->ops.tuner_ops.set_params(fe);
669 if (fe->ops.i2c_gate_ctrl)
670 fe->ops.i2c_gate_ctrl(fe, 0);
671 }
672
673 /* start auto lock */
674 lgs8gxx_auto_lock(priv);
675
676 msleep(10);
677
678 /* TODO: get real readings from device */
679
680 /* bandwidth */
681 fe_params->bandwidth_hz = 8000000;
682
683 fe_params->code_rate_HP = FEC_AUTO;
684 fe_params->code_rate_LP = FEC_AUTO;
685
686 fe_params->modulation = QAM_AUTO;
687
688 /* transmission mode */
689 fe_params->transmission_mode = TRANSMISSION_MODE_AUTO;
690
691 /* guard interval */
692 fe_params->guard_interval = GUARD_INTERVAL_AUTO;
693
694 /* hierarchy */
695 fe_params->hierarchy = HIERARCHY_NONE;
696
697 return 0;
698 }
699
700 static
lgs8gxx_get_tune_settings(struct dvb_frontend * fe,struct dvb_frontend_tune_settings * fesettings)701 int lgs8gxx_get_tune_settings(struct dvb_frontend *fe,
702 struct dvb_frontend_tune_settings *fesettings)
703 {
704 /* FIXME: copy from tda1004x.c */
705 fesettings->min_delay_ms = 800;
706 fesettings->step_size = 0;
707 fesettings->max_drift = 0;
708 return 0;
709 }
710
lgs8gxx_read_status(struct dvb_frontend * fe,enum fe_status * fe_status)711 static int lgs8gxx_read_status(struct dvb_frontend *fe,
712 enum fe_status *fe_status)
713 {
714 struct lgs8gxx_state *priv = fe->demodulator_priv;
715 s8 ret;
716 u8 t, locked = 0;
717
718 dprintk("%s\n", __func__);
719 *fe_status = 0;
720
721 lgs8gxx_get_afc_phase(priv);
722 lgs8gxx_is_locked(priv, &locked);
723 if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
724 if (locked)
725 *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
726 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
727 return 0;
728 }
729
730 ret = lgs8gxx_read_reg(priv, 0x4B, &t);
731 if (ret != 0)
732 return -EIO;
733
734 dprintk("Reg 0x4B: 0x%02X\n", t);
735
736 *fe_status = 0;
737 if (priv->config->prod == LGS8GXX_PROD_LGS8913) {
738 if ((t & 0x40) == 0x40)
739 *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER;
740 if ((t & 0x80) == 0x80)
741 *fe_status |= FE_HAS_VITERBI | FE_HAS_SYNC |
742 FE_HAS_LOCK;
743 } else {
744 if ((t & 0x80) == 0x80)
745 *fe_status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
746 FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
747 }
748
749 /* success */
750 dprintk("%s: fe_status=0x%x\n", __func__, *fe_status);
751 return 0;
752 }
753
lgs8gxx_read_signal_agc(struct lgs8gxx_state * priv,u16 * signal)754 static int lgs8gxx_read_signal_agc(struct lgs8gxx_state *priv, u16 *signal)
755 {
756 u16 v;
757 u8 agc_lvl[2], cat;
758
759 dprintk("%s()\n", __func__);
760 lgs8gxx_read_reg(priv, 0x3F, &agc_lvl[0]);
761 lgs8gxx_read_reg(priv, 0x3E, &agc_lvl[1]);
762
763 v = agc_lvl[0];
764 v <<= 8;
765 v |= agc_lvl[1];
766
767 dprintk("agc_lvl: 0x%04X\n", v);
768
769 if (v < 0x100)
770 cat = 0;
771 else if (v < 0x190)
772 cat = 5;
773 else if (v < 0x2A8)
774 cat = 4;
775 else if (v < 0x381)
776 cat = 3;
777 else if (v < 0x400)
778 cat = 2;
779 else if (v == 0x400)
780 cat = 1;
781 else
782 cat = 0;
783
784 *signal = cat * 65535 / 5;
785
786 return 0;
787 }
788
lgs8913_read_signal_strength(struct lgs8gxx_state * priv,u16 * signal)789 static int lgs8913_read_signal_strength(struct lgs8gxx_state *priv, u16 *signal)
790 {
791 u8 t; s8 ret;
792 s16 max_strength = 0;
793 u8 str;
794 u16 i, gi = priv->curr_gi;
795
796 dprintk("%s\n", __func__);
797
798 ret = lgs8gxx_read_reg(priv, 0x4B, &t);
799 if (ret != 0)
800 return -EIO;
801
802 if (fake_signal_str) {
803 if ((t & 0xC0) == 0xC0) {
804 dprintk("Fake signal strength\n");
805 *signal = 0x7FFF;
806 } else
807 *signal = 0;
808 return 0;
809 }
810
811 dprintk("gi = %d\n", gi);
812 for (i = 0; i < gi; i++) {
813
814 if ((i & 0xFF) == 0)
815 lgs8gxx_write_reg(priv, 0x84, 0x03 & (i >> 8));
816 lgs8gxx_write_reg(priv, 0x83, i & 0xFF);
817
818 lgs8gxx_read_reg(priv, 0x94, &str);
819 if (max_strength < str)
820 max_strength = str;
821 }
822
823 *signal = max_strength;
824 dprintk("%s: signal=0x%02X\n", __func__, *signal);
825
826 lgs8gxx_read_reg(priv, 0x95, &t);
827 dprintk("%s: AVG Noise=0x%02X\n", __func__, t);
828
829 return 0;
830 }
831
lgs8g75_read_signal_strength(struct lgs8gxx_state * priv,u16 * signal)832 static int lgs8g75_read_signal_strength(struct lgs8gxx_state *priv, u16 *signal)
833 {
834 u8 t;
835 s16 v = 0;
836
837 dprintk("%s\n", __func__);
838
839 lgs8gxx_read_reg(priv, 0xB1, &t);
840 v |= t;
841 v <<= 8;
842 lgs8gxx_read_reg(priv, 0xB0, &t);
843 v |= t;
844
845 *signal = v;
846 dprintk("%s: signal=0x%02X\n", __func__, *signal);
847
848 return 0;
849 }
850
lgs8gxx_read_signal_strength(struct dvb_frontend * fe,u16 * signal)851 static int lgs8gxx_read_signal_strength(struct dvb_frontend *fe, u16 *signal)
852 {
853 struct lgs8gxx_state *priv = fe->demodulator_priv;
854
855 if (priv->config->prod == LGS8GXX_PROD_LGS8913)
856 return lgs8913_read_signal_strength(priv, signal);
857 else if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
858 return lgs8g75_read_signal_strength(priv, signal);
859 else
860 return lgs8gxx_read_signal_agc(priv, signal);
861 }
862
lgs8gxx_read_snr(struct dvb_frontend * fe,u16 * snr)863 static int lgs8gxx_read_snr(struct dvb_frontend *fe, u16 *snr)
864 {
865 struct lgs8gxx_state *priv = fe->demodulator_priv;
866 u8 t;
867 *snr = 0;
868
869 if (priv->config->prod == LGS8GXX_PROD_LGS8G75)
870 lgs8gxx_read_reg(priv, 0x34, &t);
871 else
872 lgs8gxx_read_reg(priv, 0x95, &t);
873 dprintk("AVG Noise=0x%02X\n", t);
874 *snr = 256 - t;
875 *snr <<= 8;
876 dprintk("snr=0x%x\n", *snr);
877
878 return 0;
879 }
880
lgs8gxx_read_ucblocks(struct dvb_frontend * fe,u32 * ucblocks)881 static int lgs8gxx_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
882 {
883 *ucblocks = 0;
884 dprintk("%s: ucblocks=0x%x\n", __func__, *ucblocks);
885 return 0;
886 }
887
packet_counter_start(struct lgs8gxx_state * priv)888 static void packet_counter_start(struct lgs8gxx_state *priv)
889 {
890 u8 orig, t;
891
892 if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
893 lgs8gxx_read_reg(priv, 0x30, &orig);
894 orig &= 0xE7;
895 t = orig | 0x10;
896 lgs8gxx_write_reg(priv, 0x30, t);
897 t = orig | 0x18;
898 lgs8gxx_write_reg(priv, 0x30, t);
899 t = orig | 0x10;
900 lgs8gxx_write_reg(priv, 0x30, t);
901 } else {
902 lgs8gxx_write_reg(priv, 0xC6, 0x01);
903 lgs8gxx_write_reg(priv, 0xC6, 0x41);
904 lgs8gxx_write_reg(priv, 0xC6, 0x01);
905 }
906 }
907
packet_counter_stop(struct lgs8gxx_state * priv)908 static void packet_counter_stop(struct lgs8gxx_state *priv)
909 {
910 u8 t;
911
912 if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
913 lgs8gxx_read_reg(priv, 0x30, &t);
914 t &= 0xE7;
915 lgs8gxx_write_reg(priv, 0x30, t);
916 } else {
917 lgs8gxx_write_reg(priv, 0xC6, 0x81);
918 }
919 }
920
lgs8gxx_read_ber(struct dvb_frontend * fe,u32 * ber)921 static int lgs8gxx_read_ber(struct dvb_frontend *fe, u32 *ber)
922 {
923 struct lgs8gxx_state *priv = fe->demodulator_priv;
924 u8 reg_err, reg_total, t;
925 u32 total_cnt = 0, err_cnt = 0;
926 int i;
927
928 dprintk("%s\n", __func__);
929
930 packet_counter_start(priv);
931 msleep(200);
932 packet_counter_stop(priv);
933
934 if (priv->config->prod == LGS8GXX_PROD_LGS8G75) {
935 reg_total = 0x28; reg_err = 0x2C;
936 } else {
937 reg_total = 0xD0; reg_err = 0xD4;
938 }
939
940 for (i = 0; i < 4; i++) {
941 total_cnt <<= 8;
942 lgs8gxx_read_reg(priv, reg_total+3-i, &t);
943 total_cnt |= t;
944 }
945 for (i = 0; i < 4; i++) {
946 err_cnt <<= 8;
947 lgs8gxx_read_reg(priv, reg_err+3-i, &t);
948 err_cnt |= t;
949 }
950 dprintk("error=%d total=%d\n", err_cnt, total_cnt);
951
952 if (total_cnt == 0)
953 *ber = 0;
954 else
955 *ber = err_cnt * 100 / total_cnt;
956
957 dprintk("%s: ber=0x%x\n", __func__, *ber);
958 return 0;
959 }
960
lgs8gxx_i2c_gate_ctrl(struct dvb_frontend * fe,int enable)961 static int lgs8gxx_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
962 {
963 struct lgs8gxx_state *priv = fe->demodulator_priv;
964
965 if (priv->config->tuner_address == 0)
966 return 0;
967 if (enable) {
968 u8 v = 0x80 | priv->config->tuner_address;
969 return lgs8gxx_write_reg(priv, 0x01, v);
970 }
971 return lgs8gxx_write_reg(priv, 0x01, 0);
972 }
973
974 static const struct dvb_frontend_ops lgs8gxx_ops = {
975 .delsys = { SYS_DTMB },
976 .info = {
977 .name = "Legend Silicon LGS8913/LGS8GXX DMB-TH",
978 .frequency_min_hz = 474 * MHz,
979 .frequency_max_hz = 858 * MHz,
980 .frequency_stepsize_hz = 10 * kHz,
981 .caps =
982 FE_CAN_FEC_AUTO |
983 FE_CAN_QAM_AUTO |
984 FE_CAN_TRANSMISSION_MODE_AUTO |
985 FE_CAN_GUARD_INTERVAL_AUTO
986 },
987
988 .release = lgs8gxx_release,
989
990 .init = lgs8gxx_init,
991 .write = lgs8gxx_write,
992 .i2c_gate_ctrl = lgs8gxx_i2c_gate_ctrl,
993
994 .set_frontend = lgs8gxx_set_fe,
995 .get_tune_settings = lgs8gxx_get_tune_settings,
996
997 .read_status = lgs8gxx_read_status,
998 .read_ber = lgs8gxx_read_ber,
999 .read_signal_strength = lgs8gxx_read_signal_strength,
1000 .read_snr = lgs8gxx_read_snr,
1001 .read_ucblocks = lgs8gxx_read_ucblocks,
1002 };
1003
lgs8gxx_attach(const struct lgs8gxx_config * config,struct i2c_adapter * i2c)1004 struct dvb_frontend *lgs8gxx_attach(const struct lgs8gxx_config *config,
1005 struct i2c_adapter *i2c)
1006 {
1007 struct lgs8gxx_state *priv = NULL;
1008 u8 data = 0;
1009
1010 dprintk("%s()\n", __func__);
1011
1012 if (config == NULL || i2c == NULL)
1013 return NULL;
1014
1015 priv = kzalloc(sizeof(struct lgs8gxx_state), GFP_KERNEL);
1016 if (priv == NULL)
1017 goto error_out;
1018
1019 priv->config = config;
1020 priv->i2c = i2c;
1021
1022 /* check if the demod is there */
1023 if (lgs8gxx_read_reg(priv, 0, &data) != 0) {
1024 dprintk("%s lgs8gxx not found at i2c addr 0x%02X\n",
1025 __func__, priv->config->demod_address);
1026 goto error_out;
1027 }
1028
1029 lgs8gxx_read_reg(priv, 1, &data);
1030
1031 memcpy(&priv->frontend.ops, &lgs8gxx_ops,
1032 sizeof(struct dvb_frontend_ops));
1033 priv->frontend.demodulator_priv = priv;
1034
1035 if (config->prod == LGS8GXX_PROD_LGS8G75)
1036 lgs8g75_init_data(priv);
1037
1038 return &priv->frontend;
1039
1040 error_out:
1041 dprintk("%s() error_out\n", __func__);
1042 kfree(priv);
1043 return NULL;
1044
1045 }
1046 EXPORT_SYMBOL(lgs8gxx_attach);
1047
1048 MODULE_DESCRIPTION("Legend Silicon LGS8913/LGS8GXX DMB-TH demodulator driver");
1049 MODULE_AUTHOR("David T. L. Wong <davidtlwong@gmail.com>");
1050 MODULE_LICENSE("GPL");
1051 MODULE_FIRMWARE(LGS8GXX_FIRMWARE);
1052
