1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Support for LGDT3306A - 8VSB/QAM-B
4 *
5 * Copyright (C) 2013 Fred Richter <frichter@hauppauge.com>
6 * - driver structure based on lgdt3305.[ch] by Michael Krufky
7 * - code based on LG3306_V0.35 API by LG Electronics Inc.
8 */
9
10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
11
12 #include <asm/div64.h>
13 #include <linux/kernel.h>
14 #include <linux/dvb/frontend.h>
15 #include <linux/int_log.h>
16 #include "lgdt3306a.h"
17 #include <linux/i2c-mux.h>
18
19
20 static int debug;
21 module_param(debug, int, 0644);
22 MODULE_PARM_DESC(debug, "set debug level (info=1, reg=2 (or-able))");
23
24 /*
25 * Older drivers treated QAM64 and QAM256 the same; that is the HW always
26 * used "Auto" mode during detection. Setting "forced_manual"=1 allows
27 * the user to treat these modes as separate. For backwards compatibility,
28 * it's off by default. QAM_AUTO can now be specified to achive that
29 * effect even if "forced_manual"=1
30 */
31 static int forced_manual;
32 module_param(forced_manual, int, 0644);
33 MODULE_PARM_DESC(forced_manual, "if set, QAM64 and QAM256 will only lock to modulation specified");
34
35 #define DBG_INFO 1
36 #define DBG_REG 2
37 #define DBG_DUMP 4 /* FGR - comment out to remove dump code */
38
39 #define lg_debug(fmt, arg...) \
40 printk(KERN_DEBUG pr_fmt(fmt), ## arg)
41
42 #define dbg_info(fmt, arg...) \
43 do { \
44 if (debug & DBG_INFO) \
45 lg_debug(fmt, ## arg); \
46 } while (0)
47
48 #define dbg_reg(fmt, arg...) \
49 do { \
50 if (debug & DBG_REG) \
51 lg_debug(fmt, ## arg); \
52 } while (0)
53
54 #define lg_chkerr(ret) \
55 ({ \
56 int __ret; \
57 __ret = (ret < 0); \
58 if (__ret) \
59 pr_err("error %d on line %d\n", ret, __LINE__); \
60 __ret; \
61 })
62
63 struct lgdt3306a_state {
64 struct i2c_adapter *i2c_adap;
65 const struct lgdt3306a_config *cfg;
66
67 struct dvb_frontend frontend;
68
69 enum fe_modulation current_modulation;
70 u32 current_frequency;
71 u32 snr;
72
73 struct i2c_mux_core *muxc;
74 };
75
76 /*
77 * LG3306A Register Usage
78 * (LG does not really name the registers, so this code does not either)
79 *
80 * 0000 -> 00FF Common control and status
81 * 1000 -> 10FF Synchronizer control and status
82 * 1F00 -> 1FFF Smart Antenna control and status
83 * 2100 -> 21FF VSB Equalizer control and status
84 * 2800 -> 28FF QAM Equalizer control and status
85 * 3000 -> 30FF FEC control and status
86 */
87
88 enum lgdt3306a_lock_status {
89 LG3306_UNLOCK = 0x00,
90 LG3306_LOCK = 0x01,
91 LG3306_UNKNOWN_LOCK = 0xff
92 };
93
94 enum lgdt3306a_neverlock_status {
95 LG3306_NL_INIT = 0x00,
96 LG3306_NL_PROCESS = 0x01,
97 LG3306_NL_LOCK = 0x02,
98 LG3306_NL_FAIL = 0x03,
99 LG3306_NL_UNKNOWN = 0xff
100 };
101
102 enum lgdt3306a_modulation {
103 LG3306_VSB = 0x00,
104 LG3306_QAM64 = 0x01,
105 LG3306_QAM256 = 0x02,
106 LG3306_UNKNOWN_MODE = 0xff
107 };
108
109 enum lgdt3306a_lock_check {
110 LG3306_SYNC_LOCK,
111 LG3306_FEC_LOCK,
112 LG3306_TR_LOCK,
113 LG3306_AGC_LOCK,
114 };
115
116
117 #ifdef DBG_DUMP
118 static void lgdt3306a_DumpAllRegs(struct lgdt3306a_state *state);
119 static void lgdt3306a_DumpRegs(struct lgdt3306a_state *state);
120 #endif
121
122
lgdt3306a_write_reg(struct lgdt3306a_state * state,u16 reg,u8 val)123 static int lgdt3306a_write_reg(struct lgdt3306a_state *state, u16 reg, u8 val)
124 {
125 int ret;
126 u8 buf[] = { reg >> 8, reg & 0xff, val };
127 struct i2c_msg msg = {
128 .addr = state->cfg->i2c_addr, .flags = 0,
129 .buf = buf, .len = 3,
130 };
131
132 dbg_reg("reg: 0x%04x, val: 0x%02x\n", reg, val);
133
134 ret = i2c_transfer(state->i2c_adap, &msg, 1);
135
136 if (ret != 1) {
137 pr_err("error (addr %02x %02x <- %02x, err = %i)\n",
138 msg.buf[0], msg.buf[1], msg.buf[2], ret);
139 if (ret < 0)
140 return ret;
141 else
142 return -EREMOTEIO;
143 }
144 return 0;
145 }
146
lgdt3306a_read_reg(struct lgdt3306a_state * state,u16 reg,u8 * val)147 static int lgdt3306a_read_reg(struct lgdt3306a_state *state, u16 reg, u8 *val)
148 {
149 int ret;
150 u8 reg_buf[] = { reg >> 8, reg & 0xff };
151 struct i2c_msg msg[] = {
152 { .addr = state->cfg->i2c_addr,
153 .flags = 0, .buf = reg_buf, .len = 2 },
154 { .addr = state->cfg->i2c_addr,
155 .flags = I2C_M_RD, .buf = val, .len = 1 },
156 };
157
158 ret = i2c_transfer(state->i2c_adap, msg, 2);
159
160 if (ret != 2) {
161 pr_err("error (addr %02x reg %04x error (ret == %i)\n",
162 state->cfg->i2c_addr, reg, ret);
163 if (ret < 0)
164 return ret;
165 else
166 return -EREMOTEIO;
167 }
168 dbg_reg("reg: 0x%04x, val: 0x%02x\n", reg, *val);
169
170 return 0;
171 }
172
173 #define read_reg(state, reg) \
174 ({ \
175 u8 __val; \
176 int ret = lgdt3306a_read_reg(state, reg, &__val); \
177 if (lg_chkerr(ret)) \
178 __val = 0; \
179 __val; \
180 })
181
lgdt3306a_set_reg_bit(struct lgdt3306a_state * state,u16 reg,int bit,int onoff)182 static int lgdt3306a_set_reg_bit(struct lgdt3306a_state *state,
183 u16 reg, int bit, int onoff)
184 {
185 u8 val;
186 int ret;
187
188 dbg_reg("reg: 0x%04x, bit: %d, level: %d\n", reg, bit, onoff);
189
190 ret = lgdt3306a_read_reg(state, reg, &val);
191 if (lg_chkerr(ret))
192 goto fail;
193
194 val &= ~(1 << bit);
195 val |= (onoff & 1) << bit;
196
197 ret = lgdt3306a_write_reg(state, reg, val);
198 lg_chkerr(ret);
199 fail:
200 return ret;
201 }
202
203 /* ------------------------------------------------------------------------ */
204
lgdt3306a_soft_reset(struct lgdt3306a_state * state)205 static int lgdt3306a_soft_reset(struct lgdt3306a_state *state)
206 {
207 int ret;
208
209 dbg_info("\n");
210
211 ret = lgdt3306a_set_reg_bit(state, 0x0000, 7, 0);
212 if (lg_chkerr(ret))
213 goto fail;
214
215 msleep(20);
216 ret = lgdt3306a_set_reg_bit(state, 0x0000, 7, 1);
217 lg_chkerr(ret);
218
219 fail:
220 return ret;
221 }
222
lgdt3306a_mpeg_mode(struct lgdt3306a_state * state,enum lgdt3306a_mpeg_mode mode)223 static int lgdt3306a_mpeg_mode(struct lgdt3306a_state *state,
224 enum lgdt3306a_mpeg_mode mode)
225 {
226 u8 val;
227 int ret;
228
229 dbg_info("(%d)\n", mode);
230 /* transport packet format - TPSENB=0x80 */
231 ret = lgdt3306a_set_reg_bit(state, 0x0071, 7,
232 mode == LGDT3306A_MPEG_PARALLEL ? 1 : 0);
233 if (lg_chkerr(ret))
234 goto fail;
235
236 /*
237 * start of packet signal duration
238 * TPSSOPBITEN=0x40; 0=byte duration, 1=bit duration
239 */
240 ret = lgdt3306a_set_reg_bit(state, 0x0071, 6, 0);
241 if (lg_chkerr(ret))
242 goto fail;
243
244 ret = lgdt3306a_read_reg(state, 0x0070, &val);
245 if (lg_chkerr(ret))
246 goto fail;
247
248 val |= 0x10; /* TPCLKSUPB=0x10 */
249
250 if (mode == LGDT3306A_MPEG_PARALLEL)
251 val &= ~0x10;
252
253 ret = lgdt3306a_write_reg(state, 0x0070, val);
254 lg_chkerr(ret);
255
256 fail:
257 return ret;
258 }
259
lgdt3306a_mpeg_mode_polarity(struct lgdt3306a_state * state,enum lgdt3306a_tp_clock_edge edge,enum lgdt3306a_tp_valid_polarity valid)260 static int lgdt3306a_mpeg_mode_polarity(struct lgdt3306a_state *state,
261 enum lgdt3306a_tp_clock_edge edge,
262 enum lgdt3306a_tp_valid_polarity valid)
263 {
264 u8 val;
265 int ret;
266
267 dbg_info("edge=%d, valid=%d\n", edge, valid);
268
269 ret = lgdt3306a_read_reg(state, 0x0070, &val);
270 if (lg_chkerr(ret))
271 goto fail;
272
273 val &= ~0x06; /* TPCLKPOL=0x04, TPVALPOL=0x02 */
274
275 if (edge == LGDT3306A_TPCLK_RISING_EDGE)
276 val |= 0x04;
277 if (valid == LGDT3306A_TP_VALID_HIGH)
278 val |= 0x02;
279
280 ret = lgdt3306a_write_reg(state, 0x0070, val);
281 lg_chkerr(ret);
282
283 fail:
284 return ret;
285 }
286
lgdt3306a_mpeg_tristate(struct lgdt3306a_state * state,int mode)287 static int lgdt3306a_mpeg_tristate(struct lgdt3306a_state *state,
288 int mode)
289 {
290 u8 val;
291 int ret;
292
293 dbg_info("(%d)\n", mode);
294
295 if (mode) {
296 ret = lgdt3306a_read_reg(state, 0x0070, &val);
297 if (lg_chkerr(ret))
298 goto fail;
299 /*
300 * Tristate bus; TPOUTEN=0x80, TPCLKOUTEN=0x20,
301 * TPDATAOUTEN=0x08
302 */
303 val &= ~0xa8;
304 ret = lgdt3306a_write_reg(state, 0x0070, val);
305 if (lg_chkerr(ret))
306 goto fail;
307
308 /* AGCIFOUTENB=0x40; 1=Disable IFAGC pin */
309 ret = lgdt3306a_set_reg_bit(state, 0x0003, 6, 1);
310 if (lg_chkerr(ret))
311 goto fail;
312
313 } else {
314 /* enable IFAGC pin */
315 ret = lgdt3306a_set_reg_bit(state, 0x0003, 6, 0);
316 if (lg_chkerr(ret))
317 goto fail;
318
319 ret = lgdt3306a_read_reg(state, 0x0070, &val);
320 if (lg_chkerr(ret))
321 goto fail;
322
323 val |= 0xa8; /* enable bus */
324 ret = lgdt3306a_write_reg(state, 0x0070, val);
325 if (lg_chkerr(ret))
326 goto fail;
327 }
328
329 fail:
330 return ret;
331 }
332
lgdt3306a_ts_bus_ctrl(struct dvb_frontend * fe,int acquire)333 static int lgdt3306a_ts_bus_ctrl(struct dvb_frontend *fe, int acquire)
334 {
335 struct lgdt3306a_state *state = fe->demodulator_priv;
336
337 dbg_info("acquire=%d\n", acquire);
338
339 return lgdt3306a_mpeg_tristate(state, acquire ? 0 : 1);
340
341 }
342
lgdt3306a_power(struct lgdt3306a_state * state,int mode)343 static int lgdt3306a_power(struct lgdt3306a_state *state,
344 int mode)
345 {
346 int ret;
347
348 dbg_info("(%d)\n", mode);
349
350 if (mode == 0) {
351 /* into reset */
352 ret = lgdt3306a_set_reg_bit(state, 0x0000, 7, 0);
353 if (lg_chkerr(ret))
354 goto fail;
355
356 /* power down */
357 ret = lgdt3306a_set_reg_bit(state, 0x0000, 0, 0);
358 if (lg_chkerr(ret))
359 goto fail;
360
361 } else {
362 /* out of reset */
363 ret = lgdt3306a_set_reg_bit(state, 0x0000, 7, 1);
364 if (lg_chkerr(ret))
365 goto fail;
366
367 /* power up */
368 ret = lgdt3306a_set_reg_bit(state, 0x0000, 0, 1);
369 if (lg_chkerr(ret))
370 goto fail;
371 }
372
373 #ifdef DBG_DUMP
374 lgdt3306a_DumpAllRegs(state);
375 #endif
376 fail:
377 return ret;
378 }
379
380
lgdt3306a_set_vsb(struct lgdt3306a_state * state)381 static int lgdt3306a_set_vsb(struct lgdt3306a_state *state)
382 {
383 u8 val;
384 int ret;
385
386 dbg_info("\n");
387
388 /* 0. Spectrum inversion detection manual; spectrum inverted */
389 ret = lgdt3306a_read_reg(state, 0x0002, &val);
390 val &= 0xf7; /* SPECINVAUTO Off */
391 val |= 0x04; /* SPECINV On */
392 ret = lgdt3306a_write_reg(state, 0x0002, val);
393 if (lg_chkerr(ret))
394 goto fail;
395
396 /* 1. Selection of standard mode(0x08=QAM, 0x80=VSB) */
397 ret = lgdt3306a_write_reg(state, 0x0008, 0x80);
398 if (lg_chkerr(ret))
399 goto fail;
400
401 /* 2. Bandwidth mode for VSB(6MHz) */
402 ret = lgdt3306a_read_reg(state, 0x0009, &val);
403 val &= 0xe3;
404 val |= 0x0c; /* STDOPDETTMODE[2:0]=3 */
405 ret = lgdt3306a_write_reg(state, 0x0009, val);
406 if (lg_chkerr(ret))
407 goto fail;
408
409 /* 3. QAM mode detection mode(None) */
410 ret = lgdt3306a_read_reg(state, 0x0009, &val);
411 val &= 0xfc; /* STDOPDETCMODE[1:0]=0 */
412 ret = lgdt3306a_write_reg(state, 0x0009, val);
413 if (lg_chkerr(ret))
414 goto fail;
415
416 /* 4. ADC sampling frequency rate(2x sampling) */
417 ret = lgdt3306a_read_reg(state, 0x000d, &val);
418 val &= 0xbf; /* SAMPLING4XFEN=0 */
419 ret = lgdt3306a_write_reg(state, 0x000d, val);
420 if (lg_chkerr(ret))
421 goto fail;
422
423 #if 0
424 /* FGR - disable any AICC filtering, testing only */
425
426 ret = lgdt3306a_write_reg(state, 0x0024, 0x00);
427 if (lg_chkerr(ret))
428 goto fail;
429
430 /* AICCFIXFREQ0 NT N-1(Video rejection) */
431 ret = lgdt3306a_write_reg(state, 0x002e, 0x00);
432 ret = lgdt3306a_write_reg(state, 0x002f, 0x00);
433 ret = lgdt3306a_write_reg(state, 0x0030, 0x00);
434
435 /* AICCFIXFREQ1 NT N-1(Audio rejection) */
436 ret = lgdt3306a_write_reg(state, 0x002b, 0x00);
437 ret = lgdt3306a_write_reg(state, 0x002c, 0x00);
438 ret = lgdt3306a_write_reg(state, 0x002d, 0x00);
439
440 /* AICCFIXFREQ2 NT Co-Channel(Video rejection) */
441 ret = lgdt3306a_write_reg(state, 0x0028, 0x00);
442 ret = lgdt3306a_write_reg(state, 0x0029, 0x00);
443 ret = lgdt3306a_write_reg(state, 0x002a, 0x00);
444
445 /* AICCFIXFREQ3 NT Co-Channel(Audio rejection) */
446 ret = lgdt3306a_write_reg(state, 0x0025, 0x00);
447 ret = lgdt3306a_write_reg(state, 0x0026, 0x00);
448 ret = lgdt3306a_write_reg(state, 0x0027, 0x00);
449
450 #else
451 /* FGR - this works well for HVR-1955,1975 */
452
453 /* 5. AICCOPMODE NT N-1 Adj. */
454 ret = lgdt3306a_write_reg(state, 0x0024, 0x5A);
455 if (lg_chkerr(ret))
456 goto fail;
457
458 /* AICCFIXFREQ0 NT N-1(Video rejection) */
459 ret = lgdt3306a_write_reg(state, 0x002e, 0x5A);
460 ret = lgdt3306a_write_reg(state, 0x002f, 0x00);
461 ret = lgdt3306a_write_reg(state, 0x0030, 0x00);
462
463 /* AICCFIXFREQ1 NT N-1(Audio rejection) */
464 ret = lgdt3306a_write_reg(state, 0x002b, 0x36);
465 ret = lgdt3306a_write_reg(state, 0x002c, 0x00);
466 ret = lgdt3306a_write_reg(state, 0x002d, 0x00);
467
468 /* AICCFIXFREQ2 NT Co-Channel(Video rejection) */
469 ret = lgdt3306a_write_reg(state, 0x0028, 0x2A);
470 ret = lgdt3306a_write_reg(state, 0x0029, 0x00);
471 ret = lgdt3306a_write_reg(state, 0x002a, 0x00);
472
473 /* AICCFIXFREQ3 NT Co-Channel(Audio rejection) */
474 ret = lgdt3306a_write_reg(state, 0x0025, 0x06);
475 ret = lgdt3306a_write_reg(state, 0x0026, 0x00);
476 ret = lgdt3306a_write_reg(state, 0x0027, 0x00);
477 #endif
478
479 ret = lgdt3306a_read_reg(state, 0x001e, &val);
480 val &= 0x0f;
481 val |= 0xa0;
482 ret = lgdt3306a_write_reg(state, 0x001e, val);
483
484 ret = lgdt3306a_write_reg(state, 0x0022, 0x08);
485
486 ret = lgdt3306a_write_reg(state, 0x0023, 0xFF);
487
488 ret = lgdt3306a_read_reg(state, 0x211f, &val);
489 val &= 0xef;
490 ret = lgdt3306a_write_reg(state, 0x211f, val);
491
492 ret = lgdt3306a_write_reg(state, 0x2173, 0x01);
493
494 ret = lgdt3306a_read_reg(state, 0x1061, &val);
495 val &= 0xf8;
496 val |= 0x04;
497 ret = lgdt3306a_write_reg(state, 0x1061, val);
498
499 ret = lgdt3306a_read_reg(state, 0x103d, &val);
500 val &= 0xcf;
501 ret = lgdt3306a_write_reg(state, 0x103d, val);
502
503 ret = lgdt3306a_write_reg(state, 0x2122, 0x40);
504
505 ret = lgdt3306a_read_reg(state, 0x2141, &val);
506 val &= 0x3f;
507 ret = lgdt3306a_write_reg(state, 0x2141, val);
508
509 ret = lgdt3306a_read_reg(state, 0x2135, &val);
510 val &= 0x0f;
511 val |= 0x70;
512 ret = lgdt3306a_write_reg(state, 0x2135, val);
513
514 ret = lgdt3306a_read_reg(state, 0x0003, &val);
515 val &= 0xf7;
516 ret = lgdt3306a_write_reg(state, 0x0003, val);
517
518 ret = lgdt3306a_read_reg(state, 0x001c, &val);
519 val &= 0x7f;
520 ret = lgdt3306a_write_reg(state, 0x001c, val);
521
522 /* 6. EQ step size */
523 ret = lgdt3306a_read_reg(state, 0x2179, &val);
524 val &= 0xf8;
525 ret = lgdt3306a_write_reg(state, 0x2179, val);
526
527 ret = lgdt3306a_read_reg(state, 0x217a, &val);
528 val &= 0xf8;
529 ret = lgdt3306a_write_reg(state, 0x217a, val);
530
531 /* 7. Reset */
532 ret = lgdt3306a_soft_reset(state);
533 if (lg_chkerr(ret))
534 goto fail;
535
536 dbg_info("complete\n");
537 fail:
538 return ret;
539 }
540
lgdt3306a_set_qam(struct lgdt3306a_state * state,int modulation)541 static int lgdt3306a_set_qam(struct lgdt3306a_state *state, int modulation)
542 {
543 u8 val;
544 int ret;
545
546 dbg_info("modulation=%d\n", modulation);
547
548 /* 1. Selection of standard mode(0x08=QAM, 0x80=VSB) */
549 ret = lgdt3306a_write_reg(state, 0x0008, 0x08);
550 if (lg_chkerr(ret))
551 goto fail;
552
553 /* 1a. Spectrum inversion detection to Auto */
554 ret = lgdt3306a_read_reg(state, 0x0002, &val);
555 val &= 0xfb; /* SPECINV Off */
556 val |= 0x08; /* SPECINVAUTO On */
557 ret = lgdt3306a_write_reg(state, 0x0002, val);
558 if (lg_chkerr(ret))
559 goto fail;
560
561 /* 2. Bandwidth mode for QAM */
562 ret = lgdt3306a_read_reg(state, 0x0009, &val);
563 val &= 0xe3; /* STDOPDETTMODE[2:0]=0 VSB Off */
564 ret = lgdt3306a_write_reg(state, 0x0009, val);
565 if (lg_chkerr(ret))
566 goto fail;
567
568 /* 3. : 64QAM/256QAM detection(manual, auto) */
569 ret = lgdt3306a_read_reg(state, 0x0009, &val);
570 val &= 0xfc;
571 /* Check for forced Manual modulation modes; otherwise always "auto" */
572 if(forced_manual && (modulation != QAM_AUTO)){
573 val |= 0x01; /* STDOPDETCMODE[1:0]= 1=Manual */
574 } else {
575 val |= 0x02; /* STDOPDETCMODE[1:0]= 2=Auto */
576 }
577 ret = lgdt3306a_write_reg(state, 0x0009, val);
578 if (lg_chkerr(ret))
579 goto fail;
580
581 /* 3a. : 64QAM/256QAM selection for manual */
582 ret = lgdt3306a_read_reg(state, 0x101a, &val);
583 val &= 0xf8;
584 if (modulation == QAM_64)
585 val |= 0x02; /* QMDQMODE[2:0]=2=QAM64 */
586 else
587 val |= 0x04; /* QMDQMODE[2:0]=4=QAM256 */
588
589 ret = lgdt3306a_write_reg(state, 0x101a, val);
590 if (lg_chkerr(ret))
591 goto fail;
592
593 /* 4. ADC sampling frequency rate(4x sampling) */
594 ret = lgdt3306a_read_reg(state, 0x000d, &val);
595 val &= 0xbf;
596 val |= 0x40; /* SAMPLING4XFEN=1 */
597 ret = lgdt3306a_write_reg(state, 0x000d, val);
598 if (lg_chkerr(ret))
599 goto fail;
600
601 /* 5. No AICC operation in QAM mode */
602 ret = lgdt3306a_read_reg(state, 0x0024, &val);
603 val &= 0x00;
604 ret = lgdt3306a_write_reg(state, 0x0024, val);
605 if (lg_chkerr(ret))
606 goto fail;
607
608 /* 5.1 V0.36 SRDCHKALWAYS : For better QAM detection */
609 ret = lgdt3306a_read_reg(state, 0x000a, &val);
610 val &= 0xfd;
611 val |= 0x02;
612 ret = lgdt3306a_write_reg(state, 0x000a, val);
613 if (lg_chkerr(ret))
614 goto fail;
615
616 /* 5.2 V0.36 Control of "no signal" detector function */
617 ret = lgdt3306a_read_reg(state, 0x2849, &val);
618 val &= 0xdf;
619 ret = lgdt3306a_write_reg(state, 0x2849, val);
620 if (lg_chkerr(ret))
621 goto fail;
622
623 /* 5.3 Fix for Blonder Tongue HDE-2H-QAM and AQM modulators */
624 ret = lgdt3306a_read_reg(state, 0x302b, &val);
625 val &= 0x7f; /* SELFSYNCFINDEN_CQS=0; disable auto reset */
626 ret = lgdt3306a_write_reg(state, 0x302b, val);
627 if (lg_chkerr(ret))
628 goto fail;
629
630 /* 6. Reset */
631 ret = lgdt3306a_soft_reset(state);
632 if (lg_chkerr(ret))
633 goto fail;
634
635 dbg_info("complete\n");
636 fail:
637 return ret;
638 }
639
lgdt3306a_set_modulation(struct lgdt3306a_state * state,struct dtv_frontend_properties * p)640 static int lgdt3306a_set_modulation(struct lgdt3306a_state *state,
641 struct dtv_frontend_properties *p)
642 {
643 int ret;
644
645 dbg_info("\n");
646
647 switch (p->modulation) {
648 case VSB_8:
649 ret = lgdt3306a_set_vsb(state);
650 break;
651 case QAM_64:
652 case QAM_256:
653 case QAM_AUTO:
654 ret = lgdt3306a_set_qam(state, p->modulation);
655 break;
656 default:
657 return -EINVAL;
658 }
659 if (lg_chkerr(ret))
660 goto fail;
661
662 state->current_modulation = p->modulation;
663
664 fail:
665 return ret;
666 }
667
668 /* ------------------------------------------------------------------------ */
669
lgdt3306a_agc_setup(struct lgdt3306a_state * state,struct dtv_frontend_properties * p)670 static int lgdt3306a_agc_setup(struct lgdt3306a_state *state,
671 struct dtv_frontend_properties *p)
672 {
673 /* TODO: anything we want to do here??? */
674 dbg_info("\n");
675
676 switch (p->modulation) {
677 case VSB_8:
678 break;
679 case QAM_64:
680 case QAM_256:
681 case QAM_AUTO:
682 break;
683 default:
684 return -EINVAL;
685 }
686 return 0;
687 }
688
689 /* ------------------------------------------------------------------------ */
690
lgdt3306a_set_inversion(struct lgdt3306a_state * state,int inversion)691 static int lgdt3306a_set_inversion(struct lgdt3306a_state *state,
692 int inversion)
693 {
694 int ret;
695
696 dbg_info("(%d)\n", inversion);
697
698 ret = lgdt3306a_set_reg_bit(state, 0x0002, 2, inversion ? 1 : 0);
699 return ret;
700 }
701
lgdt3306a_set_inversion_auto(struct lgdt3306a_state * state,int enabled)702 static int lgdt3306a_set_inversion_auto(struct lgdt3306a_state *state,
703 int enabled)
704 {
705 int ret;
706
707 dbg_info("(%d)\n", enabled);
708
709 /* 0=Manual 1=Auto(QAM only) - SPECINVAUTO=0x04 */
710 ret = lgdt3306a_set_reg_bit(state, 0x0002, 3, enabled);
711 return ret;
712 }
713
lgdt3306a_set_if(struct lgdt3306a_state * state,struct dtv_frontend_properties * p)714 static int lgdt3306a_set_if(struct lgdt3306a_state *state,
715 struct dtv_frontend_properties *p)
716 {
717 int ret;
718 u16 if_freq_khz;
719 u8 nco1, nco2;
720
721 switch (p->modulation) {
722 case VSB_8:
723 if_freq_khz = state->cfg->vsb_if_khz;
724 break;
725 case QAM_64:
726 case QAM_256:
727 case QAM_AUTO:
728 if_freq_khz = state->cfg->qam_if_khz;
729 break;
730 default:
731 return -EINVAL;
732 }
733
734 switch (if_freq_khz) {
735 default:
736 pr_warn("IF=%d KHz is not supported, 3250 assumed\n",
737 if_freq_khz);
738 fallthrough;
739 case 3250: /* 3.25Mhz */
740 nco1 = 0x34;
741 nco2 = 0x00;
742 break;
743 case 3500: /* 3.50Mhz */
744 nco1 = 0x38;
745 nco2 = 0x00;
746 break;
747 case 4000: /* 4.00Mhz */
748 nco1 = 0x40;
749 nco2 = 0x00;
750 break;
751 case 5000: /* 5.00Mhz */
752 nco1 = 0x50;
753 nco2 = 0x00;
754 break;
755 case 5380: /* 5.38Mhz */
756 nco1 = 0x56;
757 nco2 = 0x14;
758 break;
759 }
760 ret = lgdt3306a_write_reg(state, 0x0010, nco1);
761 if (ret)
762 return ret;
763 ret = lgdt3306a_write_reg(state, 0x0011, nco2);
764 if (ret)
765 return ret;
766
767 dbg_info("if_freq=%d KHz->[%04x]\n", if_freq_khz, nco1<<8 | nco2);
768
769 return 0;
770 }
771
772 /* ------------------------------------------------------------------------ */
773
lgdt3306a_i2c_gate_ctrl(struct dvb_frontend * fe,int enable)774 static int lgdt3306a_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
775 {
776 struct lgdt3306a_state *state = fe->demodulator_priv;
777
778 if (state->cfg->deny_i2c_rptr) {
779 dbg_info("deny_i2c_rptr=%d\n", state->cfg->deny_i2c_rptr);
780 return 0;
781 }
782 dbg_info("(%d)\n", enable);
783
784 /* NI2CRPTEN=0x80 */
785 return lgdt3306a_set_reg_bit(state, 0x0002, 7, enable ? 0 : 1);
786 }
787
lgdt3306a_sleep(struct lgdt3306a_state * state)788 static int lgdt3306a_sleep(struct lgdt3306a_state *state)
789 {
790 int ret;
791
792 dbg_info("\n");
793 state->current_frequency = -1; /* force re-tune, when we wake */
794
795 ret = lgdt3306a_mpeg_tristate(state, 1); /* disable data bus */
796 if (lg_chkerr(ret))
797 goto fail;
798
799 ret = lgdt3306a_power(state, 0); /* power down */
800 lg_chkerr(ret);
801
802 fail:
803 return 0;
804 }
805
lgdt3306a_fe_sleep(struct dvb_frontend * fe)806 static int lgdt3306a_fe_sleep(struct dvb_frontend *fe)
807 {
808 struct lgdt3306a_state *state = fe->demodulator_priv;
809
810 return lgdt3306a_sleep(state);
811 }
812
lgdt3306a_init(struct dvb_frontend * fe)813 static int lgdt3306a_init(struct dvb_frontend *fe)
814 {
815 struct lgdt3306a_state *state = fe->demodulator_priv;
816 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
817 u8 val;
818 int ret;
819
820 dbg_info("\n");
821
822 /* 1. Normal operation mode */
823 ret = lgdt3306a_set_reg_bit(state, 0x0001, 0, 1); /* SIMFASTENB=0x01 */
824 if (lg_chkerr(ret))
825 goto fail;
826
827 /* 2. Spectrum inversion auto detection (Not valid for VSB) */
828 ret = lgdt3306a_set_inversion_auto(state, 0);
829 if (lg_chkerr(ret))
830 goto fail;
831
832 /* 3. Spectrum inversion(According to the tuner configuration) */
833 ret = lgdt3306a_set_inversion(state, 1);
834 if (lg_chkerr(ret))
835 goto fail;
836
837 /* 4. Peak-to-peak voltage of ADC input signal */
838
839 /* ADCSEL1V=0x80=1Vpp; 0x00=2Vpp */
840 ret = lgdt3306a_set_reg_bit(state, 0x0004, 7, 1);
841 if (lg_chkerr(ret))
842 goto fail;
843
844 /* 5. ADC output data capture clock phase */
845
846 /* 0=same phase as ADC clock */
847 ret = lgdt3306a_set_reg_bit(state, 0x0004, 2, 0);
848 if (lg_chkerr(ret))
849 goto fail;
850
851 /* 5a. ADC sampling clock source */
852
853 /* ADCCLKPLLSEL=0x08; 0=use ext clock, not PLL */
854 ret = lgdt3306a_set_reg_bit(state, 0x0004, 3, 0);
855 if (lg_chkerr(ret))
856 goto fail;
857
858 /* 6. Automatic PLL set */
859
860 /* PLLSETAUTO=0x40; 0=off */
861 ret = lgdt3306a_set_reg_bit(state, 0x0005, 6, 0);
862 if (lg_chkerr(ret))
863 goto fail;
864
865 if (state->cfg->xtalMHz == 24) { /* 24MHz */
866 /* 7. Frequency for PLL output(0x2564 for 192MHz for 24MHz) */
867 ret = lgdt3306a_read_reg(state, 0x0005, &val);
868 if (lg_chkerr(ret))
869 goto fail;
870 val &= 0xc0;
871 val |= 0x25;
872 ret = lgdt3306a_write_reg(state, 0x0005, val);
873 if (lg_chkerr(ret))
874 goto fail;
875 ret = lgdt3306a_write_reg(state, 0x0006, 0x64);
876 if (lg_chkerr(ret))
877 goto fail;
878
879 /* 8. ADC sampling frequency(0x180000 for 24MHz sampling) */
880 ret = lgdt3306a_read_reg(state, 0x000d, &val);
881 if (lg_chkerr(ret))
882 goto fail;
883 val &= 0xc0;
884 val |= 0x18;
885 ret = lgdt3306a_write_reg(state, 0x000d, val);
886 if (lg_chkerr(ret))
887 goto fail;
888
889 } else if (state->cfg->xtalMHz == 25) { /* 25MHz */
890 /* 7. Frequency for PLL output */
891 ret = lgdt3306a_read_reg(state, 0x0005, &val);
892 if (lg_chkerr(ret))
893 goto fail;
894 val &= 0xc0;
895 val |= 0x25;
896 ret = lgdt3306a_write_reg(state, 0x0005, val);
897 if (lg_chkerr(ret))
898 goto fail;
899 ret = lgdt3306a_write_reg(state, 0x0006, 0x64);
900 if (lg_chkerr(ret))
901 goto fail;
902
903 /* 8. ADC sampling frequency(0x190000 for 25MHz sampling) */
904 ret = lgdt3306a_read_reg(state, 0x000d, &val);
905 if (lg_chkerr(ret))
906 goto fail;
907 val &= 0xc0;
908 val |= 0x19;
909 ret = lgdt3306a_write_reg(state, 0x000d, val);
910 if (lg_chkerr(ret))
911 goto fail;
912 } else {
913 pr_err("Bad xtalMHz=%d\n", state->cfg->xtalMHz);
914 }
915 #if 0
916 ret = lgdt3306a_write_reg(state, 0x000e, 0x00);
917 ret = lgdt3306a_write_reg(state, 0x000f, 0x00);
918 #endif
919
920 /* 9. Center frequency of input signal of ADC */
921 ret = lgdt3306a_write_reg(state, 0x0010, 0x34); /* 3.25MHz */
922 ret = lgdt3306a_write_reg(state, 0x0011, 0x00);
923
924 /* 10. Fixed gain error value */
925 ret = lgdt3306a_write_reg(state, 0x0014, 0); /* gain error=0 */
926
927 /* 10a. VSB TR BW gear shift initial step */
928 ret = lgdt3306a_read_reg(state, 0x103c, &val);
929 val &= 0x0f;
930 val |= 0x20; /* SAMGSAUTOSTL_V[3:0] = 2 */
931 ret = lgdt3306a_write_reg(state, 0x103c, val);
932
933 /* 10b. Timing offset calibration in low temperature for VSB */
934 ret = lgdt3306a_read_reg(state, 0x103d, &val);
935 val &= 0xfc;
936 val |= 0x03;
937 ret = lgdt3306a_write_reg(state, 0x103d, val);
938
939 /* 10c. Timing offset calibration in low temperature for QAM */
940 ret = lgdt3306a_read_reg(state, 0x1036, &val);
941 val &= 0xf0;
942 val |= 0x0c;
943 ret = lgdt3306a_write_reg(state, 0x1036, val);
944
945 /* 11. Using the imaginary part of CIR in CIR loading */
946 ret = lgdt3306a_read_reg(state, 0x211f, &val);
947 val &= 0xef; /* do not use imaginary of CIR */
948 ret = lgdt3306a_write_reg(state, 0x211f, val);
949
950 /* 12. Control of no signal detector function */
951 ret = lgdt3306a_read_reg(state, 0x2849, &val);
952 val &= 0xef; /* NOUSENOSIGDET=0, enable no signal detector */
953 ret = lgdt3306a_write_reg(state, 0x2849, val);
954
955 /* FGR - put demod in some known mode */
956 ret = lgdt3306a_set_vsb(state);
957
958 /* 13. TP stream format */
959 ret = lgdt3306a_mpeg_mode(state, state->cfg->mpeg_mode);
960
961 /* 14. disable output buses */
962 ret = lgdt3306a_mpeg_tristate(state, 1);
963
964 /* 15. Sleep (in reset) */
965 ret = lgdt3306a_sleep(state);
966 lg_chkerr(ret);
967
968 c->cnr.len = 1;
969 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
970
971 fail:
972 return ret;
973 }
974
lgdt3306a_set_parameters(struct dvb_frontend * fe)975 static int lgdt3306a_set_parameters(struct dvb_frontend *fe)
976 {
977 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
978 struct lgdt3306a_state *state = fe->demodulator_priv;
979 int ret;
980
981 dbg_info("(%d, %d)\n", p->frequency, p->modulation);
982
983 if (state->current_frequency == p->frequency &&
984 state->current_modulation == p->modulation) {
985 dbg_info(" (already set, skipping ...)\n");
986 return 0;
987 }
988 state->current_frequency = -1;
989 state->current_modulation = -1;
990
991 ret = lgdt3306a_power(state, 1); /* power up */
992 if (lg_chkerr(ret))
993 goto fail;
994
995 if (fe->ops.tuner_ops.set_params) {
996 ret = fe->ops.tuner_ops.set_params(fe);
997 if (fe->ops.i2c_gate_ctrl)
998 fe->ops.i2c_gate_ctrl(fe, 0);
999 #if 0
1000 if (lg_chkerr(ret))
1001 goto fail;
1002 state->current_frequency = p->frequency;
1003 #endif
1004 }
1005
1006 ret = lgdt3306a_set_modulation(state, p);
1007 if (lg_chkerr(ret))
1008 goto fail;
1009
1010 ret = lgdt3306a_agc_setup(state, p);
1011 if (lg_chkerr(ret))
1012 goto fail;
1013
1014 ret = lgdt3306a_set_if(state, p);
1015 if (lg_chkerr(ret))
1016 goto fail;
1017
1018 /* spectral_inversion defaults already set for VSB and QAM */
1019
1020 ret = lgdt3306a_mpeg_mode(state, state->cfg->mpeg_mode);
1021 if (lg_chkerr(ret))
1022 goto fail;
1023
1024 ret = lgdt3306a_mpeg_mode_polarity(state,
1025 state->cfg->tpclk_edge,
1026 state->cfg->tpvalid_polarity);
1027 if (lg_chkerr(ret))
1028 goto fail;
1029
1030 ret = lgdt3306a_mpeg_tristate(state, 0); /* enable data bus */
1031 if (lg_chkerr(ret))
1032 goto fail;
1033
1034 ret = lgdt3306a_soft_reset(state);
1035 if (lg_chkerr(ret))
1036 goto fail;
1037
1038 #ifdef DBG_DUMP
1039 lgdt3306a_DumpAllRegs(state);
1040 #endif
1041 state->current_frequency = p->frequency;
1042 fail:
1043 return ret;
1044 }
1045
lgdt3306a_get_frontend(struct dvb_frontend * fe,struct dtv_frontend_properties * p)1046 static int lgdt3306a_get_frontend(struct dvb_frontend *fe,
1047 struct dtv_frontend_properties *p)
1048 {
1049 struct lgdt3306a_state *state = fe->demodulator_priv;
1050
1051 dbg_info("(%u, %d)\n",
1052 state->current_frequency, state->current_modulation);
1053
1054 p->modulation = state->current_modulation;
1055 p->frequency = state->current_frequency;
1056 return 0;
1057 }
1058
lgdt3306a_get_frontend_algo(struct dvb_frontend * fe)1059 static enum dvbfe_algo lgdt3306a_get_frontend_algo(struct dvb_frontend *fe)
1060 {
1061 #if 1
1062 return DVBFE_ALGO_CUSTOM;
1063 #else
1064 return DVBFE_ALGO_HW;
1065 #endif
1066 }
1067
1068 /* ------------------------------------------------------------------------ */
lgdt3306a_monitor_vsb(struct lgdt3306a_state * state)1069 static int lgdt3306a_monitor_vsb(struct lgdt3306a_state *state)
1070 {
1071 u8 val;
1072 int ret;
1073 u8 snrRef, maxPowerMan, nCombDet;
1074 u16 fbDlyCir;
1075
1076 ret = lgdt3306a_read_reg(state, 0x21a1, &val);
1077 if (ret)
1078 return ret;
1079 snrRef = val & 0x3f;
1080
1081 ret = lgdt3306a_read_reg(state, 0x2185, &maxPowerMan);
1082 if (ret)
1083 return ret;
1084
1085 ret = lgdt3306a_read_reg(state, 0x2191, &val);
1086 if (ret)
1087 return ret;
1088 nCombDet = (val & 0x80) >> 7;
1089
1090 ret = lgdt3306a_read_reg(state, 0x2180, &val);
1091 if (ret)
1092 return ret;
1093 fbDlyCir = (val & 0x03) << 8;
1094
1095 ret = lgdt3306a_read_reg(state, 0x2181, &val);
1096 if (ret)
1097 return ret;
1098 fbDlyCir |= val;
1099
1100 dbg_info("snrRef=%d maxPowerMan=0x%x nCombDet=%d fbDlyCir=0x%x\n",
1101 snrRef, maxPowerMan, nCombDet, fbDlyCir);
1102
1103 /* Carrier offset sub loop bandwidth */
1104 ret = lgdt3306a_read_reg(state, 0x1061, &val);
1105 if (ret)
1106 return ret;
1107 val &= 0xf8;
1108 if ((snrRef > 18) && (maxPowerMan > 0x68)
1109 && (nCombDet == 0x01)
1110 && ((fbDlyCir == 0x03FF) || (fbDlyCir < 0x6C))) {
1111 /* SNR is over 18dB and no ghosting */
1112 val |= 0x00; /* final bandwidth = 0 */
1113 } else {
1114 val |= 0x04; /* final bandwidth = 4 */
1115 }
1116 ret = lgdt3306a_write_reg(state, 0x1061, val);
1117 if (ret)
1118 return ret;
1119
1120 /* Adjust Notch Filter */
1121 ret = lgdt3306a_read_reg(state, 0x0024, &val);
1122 if (ret)
1123 return ret;
1124 val &= 0x0f;
1125 if (nCombDet == 0) { /* Turn on the Notch Filter */
1126 val |= 0x50;
1127 }
1128 ret = lgdt3306a_write_reg(state, 0x0024, val);
1129 if (ret)
1130 return ret;
1131
1132 /* VSB Timing Recovery output normalization */
1133 ret = lgdt3306a_read_reg(state, 0x103d, &val);
1134 if (ret)
1135 return ret;
1136 val &= 0xcf;
1137 val |= 0x20;
1138 ret = lgdt3306a_write_reg(state, 0x103d, val);
1139
1140 return ret;
1141 }
1142
1143 static enum lgdt3306a_modulation
lgdt3306a_check_oper_mode(struct lgdt3306a_state * state)1144 lgdt3306a_check_oper_mode(struct lgdt3306a_state *state)
1145 {
1146 u8 val = 0;
1147 int ret;
1148
1149 ret = lgdt3306a_read_reg(state, 0x0081, &val);
1150 if (ret)
1151 goto err;
1152
1153 if (val & 0x80) {
1154 dbg_info("VSB\n");
1155 return LG3306_VSB;
1156 }
1157 if (val & 0x08) {
1158 ret = lgdt3306a_read_reg(state, 0x00a6, &val);
1159 if (ret)
1160 goto err;
1161 val = val >> 2;
1162 if (val & 0x01) {
1163 dbg_info("QAM256\n");
1164 return LG3306_QAM256;
1165 }
1166 dbg_info("QAM64\n");
1167 return LG3306_QAM64;
1168 }
1169 err:
1170 pr_warn("UNKNOWN\n");
1171 return LG3306_UNKNOWN_MODE;
1172 }
1173
1174 static enum lgdt3306a_lock_status
lgdt3306a_check_lock_status(struct lgdt3306a_state * state,enum lgdt3306a_lock_check whatLock)1175 lgdt3306a_check_lock_status(struct lgdt3306a_state *state,
1176 enum lgdt3306a_lock_check whatLock)
1177 {
1178 u8 val = 0;
1179 int ret;
1180 enum lgdt3306a_modulation modeOper;
1181 enum lgdt3306a_lock_status lockStatus;
1182
1183 modeOper = LG3306_UNKNOWN_MODE;
1184
1185 switch (whatLock) {
1186 case LG3306_SYNC_LOCK:
1187 {
1188 ret = lgdt3306a_read_reg(state, 0x00a6, &val);
1189 if (ret)
1190 return ret;
1191
1192 if ((val & 0x80) == 0x80)
1193 lockStatus = LG3306_LOCK;
1194 else
1195 lockStatus = LG3306_UNLOCK;
1196
1197 dbg_info("SYNC_LOCK=%x\n", lockStatus);
1198 break;
1199 }
1200 case LG3306_AGC_LOCK:
1201 {
1202 ret = lgdt3306a_read_reg(state, 0x0080, &val);
1203 if (ret)
1204 return ret;
1205
1206 if ((val & 0x40) == 0x40)
1207 lockStatus = LG3306_LOCK;
1208 else
1209 lockStatus = LG3306_UNLOCK;
1210
1211 dbg_info("AGC_LOCK=%x\n", lockStatus);
1212 break;
1213 }
1214 case LG3306_TR_LOCK:
1215 {
1216 modeOper = lgdt3306a_check_oper_mode(state);
1217 if ((modeOper == LG3306_QAM64) || (modeOper == LG3306_QAM256)) {
1218 ret = lgdt3306a_read_reg(state, 0x1094, &val);
1219 if (ret)
1220 return ret;
1221
1222 if ((val & 0x80) == 0x80)
1223 lockStatus = LG3306_LOCK;
1224 else
1225 lockStatus = LG3306_UNLOCK;
1226 } else
1227 lockStatus = LG3306_UNKNOWN_LOCK;
1228
1229 dbg_info("TR_LOCK=%x\n", lockStatus);
1230 break;
1231 }
1232 case LG3306_FEC_LOCK:
1233 {
1234 modeOper = lgdt3306a_check_oper_mode(state);
1235 if ((modeOper == LG3306_QAM64) || (modeOper == LG3306_QAM256)) {
1236 ret = lgdt3306a_read_reg(state, 0x0080, &val);
1237 if (ret)
1238 return ret;
1239
1240 if ((val & 0x10) == 0x10)
1241 lockStatus = LG3306_LOCK;
1242 else
1243 lockStatus = LG3306_UNLOCK;
1244 } else
1245 lockStatus = LG3306_UNKNOWN_LOCK;
1246
1247 dbg_info("FEC_LOCK=%x\n", lockStatus);
1248 break;
1249 }
1250
1251 default:
1252 lockStatus = LG3306_UNKNOWN_LOCK;
1253 pr_warn("UNKNOWN whatLock=%d\n", whatLock);
1254 break;
1255 }
1256
1257 return lockStatus;
1258 }
1259
1260 static enum lgdt3306a_neverlock_status
lgdt3306a_check_neverlock_status(struct lgdt3306a_state * state)1261 lgdt3306a_check_neverlock_status(struct lgdt3306a_state *state)
1262 {
1263 u8 val = 0;
1264 int ret;
1265 enum lgdt3306a_neverlock_status lockStatus;
1266
1267 ret = lgdt3306a_read_reg(state, 0x0080, &val);
1268 if (ret)
1269 return ret;
1270 lockStatus = (enum lgdt3306a_neverlock_status)(val & 0x03);
1271
1272 dbg_info("NeverLock=%d", lockStatus);
1273
1274 return lockStatus;
1275 }
1276
lgdt3306a_pre_monitoring(struct lgdt3306a_state * state)1277 static int lgdt3306a_pre_monitoring(struct lgdt3306a_state *state)
1278 {
1279 u8 val = 0;
1280 int ret;
1281 u8 currChDiffACQ, snrRef, mainStrong, aiccrejStatus;
1282
1283 /* Channel variation */
1284 ret = lgdt3306a_read_reg(state, 0x21bc, &currChDiffACQ);
1285 if (ret)
1286 return ret;
1287
1288 /* SNR of Frame sync */
1289 ret = lgdt3306a_read_reg(state, 0x21a1, &val);
1290 if (ret)
1291 return ret;
1292 snrRef = val & 0x3f;
1293
1294 /* Strong Main CIR */
1295 ret = lgdt3306a_read_reg(state, 0x2199, &val);
1296 if (ret)
1297 return ret;
1298 mainStrong = (val & 0x40) >> 6;
1299
1300 ret = lgdt3306a_read_reg(state, 0x0090, &val);
1301 if (ret)
1302 return ret;
1303 aiccrejStatus = (val & 0xf0) >> 4;
1304
1305 dbg_info("snrRef=%d mainStrong=%d aiccrejStatus=%d currChDiffACQ=0x%x\n",
1306 snrRef, mainStrong, aiccrejStatus, currChDiffACQ);
1307
1308 #if 0
1309 /* Dynamic ghost exists */
1310 if ((mainStrong == 0) && (currChDiffACQ > 0x70))
1311 #endif
1312 if (mainStrong == 0) {
1313 ret = lgdt3306a_read_reg(state, 0x2135, &val);
1314 if (ret)
1315 return ret;
1316 val &= 0x0f;
1317 val |= 0xa0;
1318 ret = lgdt3306a_write_reg(state, 0x2135, val);
1319 if (ret)
1320 return ret;
1321
1322 ret = lgdt3306a_read_reg(state, 0x2141, &val);
1323 if (ret)
1324 return ret;
1325 val &= 0x3f;
1326 val |= 0x80;
1327 ret = lgdt3306a_write_reg(state, 0x2141, val);
1328 if (ret)
1329 return ret;
1330
1331 ret = lgdt3306a_write_reg(state, 0x2122, 0x70);
1332 if (ret)
1333 return ret;
1334 } else { /* Weak ghost or static channel */
1335 ret = lgdt3306a_read_reg(state, 0x2135, &val);
1336 if (ret)
1337 return ret;
1338 val &= 0x0f;
1339 val |= 0x70;
1340 ret = lgdt3306a_write_reg(state, 0x2135, val);
1341 if (ret)
1342 return ret;
1343
1344 ret = lgdt3306a_read_reg(state, 0x2141, &val);
1345 if (ret)
1346 return ret;
1347 val &= 0x3f;
1348 val |= 0x40;
1349 ret = lgdt3306a_write_reg(state, 0x2141, val);
1350 if (ret)
1351 return ret;
1352
1353 ret = lgdt3306a_write_reg(state, 0x2122, 0x40);
1354 if (ret)
1355 return ret;
1356 }
1357 return 0;
1358 }
1359
1360 static enum lgdt3306a_lock_status
lgdt3306a_sync_lock_poll(struct lgdt3306a_state * state)1361 lgdt3306a_sync_lock_poll(struct lgdt3306a_state *state)
1362 {
1363 enum lgdt3306a_lock_status syncLockStatus = LG3306_UNLOCK;
1364 int i;
1365
1366 for (i = 0; i < 2; i++) {
1367 msleep(30);
1368
1369 syncLockStatus = lgdt3306a_check_lock_status(state,
1370 LG3306_SYNC_LOCK);
1371
1372 if (syncLockStatus == LG3306_LOCK) {
1373 dbg_info("locked(%d)\n", i);
1374 return LG3306_LOCK;
1375 }
1376 }
1377 dbg_info("not locked\n");
1378 return LG3306_UNLOCK;
1379 }
1380
1381 static enum lgdt3306a_lock_status
lgdt3306a_fec_lock_poll(struct lgdt3306a_state * state)1382 lgdt3306a_fec_lock_poll(struct lgdt3306a_state *state)
1383 {
1384 enum lgdt3306a_lock_status FECLockStatus = LG3306_UNLOCK;
1385 int i;
1386
1387 for (i = 0; i < 2; i++) {
1388 msleep(30);
1389
1390 FECLockStatus = lgdt3306a_check_lock_status(state,
1391 LG3306_FEC_LOCK);
1392
1393 if (FECLockStatus == LG3306_LOCK) {
1394 dbg_info("locked(%d)\n", i);
1395 return FECLockStatus;
1396 }
1397 }
1398 dbg_info("not locked\n");
1399 return FECLockStatus;
1400 }
1401
1402 static enum lgdt3306a_neverlock_status
lgdt3306a_neverlock_poll(struct lgdt3306a_state * state)1403 lgdt3306a_neverlock_poll(struct lgdt3306a_state *state)
1404 {
1405 enum lgdt3306a_neverlock_status NLLockStatus = LG3306_NL_FAIL;
1406 int i;
1407
1408 for (i = 0; i < 5; i++) {
1409 msleep(30);
1410
1411 NLLockStatus = lgdt3306a_check_neverlock_status(state);
1412
1413 if (NLLockStatus == LG3306_NL_LOCK) {
1414 dbg_info("NL_LOCK(%d)\n", i);
1415 return NLLockStatus;
1416 }
1417 }
1418 dbg_info("NLLockStatus=%d\n", NLLockStatus);
1419 return NLLockStatus;
1420 }
1421
lgdt3306a_get_packet_error(struct lgdt3306a_state * state)1422 static u8 lgdt3306a_get_packet_error(struct lgdt3306a_state *state)
1423 {
1424 u8 val;
1425 int ret;
1426
1427 ret = lgdt3306a_read_reg(state, 0x00fa, &val);
1428 if (ret)
1429 return ret;
1430
1431 return val;
1432 }
1433
1434 static const u32 valx_x10[] = {
1435 10, 11, 13, 15, 17, 20, 25, 33, 41, 50, 59, 73, 87, 100
1436 };
1437 static const u32 log10x_x1000[] = {
1438 0, 41, 114, 176, 230, 301, 398, 518, 613, 699, 771, 863, 939, 1000
1439 };
1440
log10_x1000(u32 x)1441 static u32 log10_x1000(u32 x)
1442 {
1443 u32 diff_val, step_val, step_log10;
1444 u32 log_val = 0;
1445 u32 i;
1446
1447 if (x <= 0)
1448 return -1000000; /* signal error */
1449
1450 if (x == 10)
1451 return 0; /* log(1)=0 */
1452
1453 if (x < 10) {
1454 while (x < 10) {
1455 x = x * 10;
1456 log_val--;
1457 }
1458 } else { /* x > 10 */
1459 while (x >= 100) {
1460 x = x / 10;
1461 log_val++;
1462 }
1463 }
1464 log_val *= 1000;
1465
1466 if (x == 10) /* was our input an exact multiple of 10 */
1467 return log_val; /* don't need to interpolate */
1468
1469 /* find our place on the log curve */
1470 for (i = 1; i < ARRAY_SIZE(valx_x10); i++) {
1471 if (valx_x10[i] >= x)
1472 break;
1473 }
1474 if (i == ARRAY_SIZE(valx_x10))
1475 return log_val + log10x_x1000[i - 1];
1476
1477 diff_val = x - valx_x10[i-1];
1478 step_val = valx_x10[i] - valx_x10[i - 1];
1479 step_log10 = log10x_x1000[i] - log10x_x1000[i - 1];
1480
1481 /* do a linear interpolation to get in-between values */
1482 return log_val + log10x_x1000[i - 1] +
1483 ((diff_val*step_log10) / step_val);
1484 }
1485
lgdt3306a_calculate_snr_x100(struct lgdt3306a_state * state)1486 static u32 lgdt3306a_calculate_snr_x100(struct lgdt3306a_state *state)
1487 {
1488 u32 mse; /* Mean-Square Error */
1489 u32 pwr; /* Constelation power */
1490 u32 snr_x100;
1491
1492 mse = (read_reg(state, 0x00ec) << 8) |
1493 (read_reg(state, 0x00ed));
1494 pwr = (read_reg(state, 0x00e8) << 8) |
1495 (read_reg(state, 0x00e9));
1496
1497 if (mse == 0) /* no signal */
1498 return 0;
1499
1500 snr_x100 = log10_x1000((pwr * 10000) / mse) - 3000;
1501 dbg_info("mse=%u, pwr=%u, snr_x100=%d\n", mse, pwr, snr_x100);
1502
1503 return snr_x100;
1504 }
1505
1506 static enum lgdt3306a_lock_status
lgdt3306a_vsb_lock_poll(struct lgdt3306a_state * state)1507 lgdt3306a_vsb_lock_poll(struct lgdt3306a_state *state)
1508 {
1509 int ret;
1510 u8 cnt = 0;
1511 u8 packet_error;
1512 u32 snr;
1513
1514 for (cnt = 0; cnt < 10; cnt++) {
1515 if (lgdt3306a_sync_lock_poll(state) == LG3306_UNLOCK) {
1516 dbg_info("no sync lock!\n");
1517 return LG3306_UNLOCK;
1518 }
1519
1520 msleep(20);
1521 ret = lgdt3306a_pre_monitoring(state);
1522 if (ret)
1523 break;
1524
1525 packet_error = lgdt3306a_get_packet_error(state);
1526 snr = lgdt3306a_calculate_snr_x100(state);
1527 dbg_info("cnt=%d errors=%d snr=%d\n", cnt, packet_error, snr);
1528
1529 if ((snr >= 1500) && (packet_error < 0xff))
1530 return LG3306_LOCK;
1531 }
1532
1533 dbg_info("not locked!\n");
1534 return LG3306_UNLOCK;
1535 }
1536
1537 static enum lgdt3306a_lock_status
lgdt3306a_qam_lock_poll(struct lgdt3306a_state * state)1538 lgdt3306a_qam_lock_poll(struct lgdt3306a_state *state)
1539 {
1540 u8 cnt;
1541 u8 packet_error;
1542 u32 snr;
1543
1544 for (cnt = 0; cnt < 10; cnt++) {
1545 if (lgdt3306a_fec_lock_poll(state) == LG3306_UNLOCK) {
1546 dbg_info("no fec lock!\n");
1547 return LG3306_UNLOCK;
1548 }
1549
1550 msleep(20);
1551
1552 packet_error = lgdt3306a_get_packet_error(state);
1553 snr = lgdt3306a_calculate_snr_x100(state);
1554 dbg_info("cnt=%d errors=%d snr=%d\n", cnt, packet_error, snr);
1555
1556 if ((snr >= 1500) && (packet_error < 0xff))
1557 return LG3306_LOCK;
1558 }
1559
1560 dbg_info("not locked!\n");
1561 return LG3306_UNLOCK;
1562 }
1563
lgdt3306a_read_status(struct dvb_frontend * fe,enum fe_status * status)1564 static int lgdt3306a_read_status(struct dvb_frontend *fe,
1565 enum fe_status *status)
1566 {
1567 struct lgdt3306a_state *state = fe->demodulator_priv;
1568 struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1569 u16 strength = 0;
1570 int ret = 0;
1571
1572 if (fe->ops.tuner_ops.get_rf_strength) {
1573 ret = fe->ops.tuner_ops.get_rf_strength(fe, &strength);
1574 if (ret == 0)
1575 dbg_info("strength=%d\n", strength);
1576 else
1577 dbg_info("fe->ops.tuner_ops.get_rf_strength() failed\n");
1578 }
1579
1580 *status = 0;
1581 if (lgdt3306a_neverlock_poll(state) == LG3306_NL_LOCK) {
1582 *status |= FE_HAS_SIGNAL;
1583 *status |= FE_HAS_CARRIER;
1584
1585 switch (state->current_modulation) {
1586 case QAM_256:
1587 case QAM_64:
1588 case QAM_AUTO:
1589 if (lgdt3306a_qam_lock_poll(state) == LG3306_LOCK) {
1590 *status |= FE_HAS_VITERBI;
1591 *status |= FE_HAS_SYNC;
1592
1593 *status |= FE_HAS_LOCK;
1594 }
1595 break;
1596 case VSB_8:
1597 if (lgdt3306a_vsb_lock_poll(state) == LG3306_LOCK) {
1598 *status |= FE_HAS_VITERBI;
1599 *status |= FE_HAS_SYNC;
1600
1601 *status |= FE_HAS_LOCK;
1602
1603 ret = lgdt3306a_monitor_vsb(state);
1604 }
1605 break;
1606 default:
1607 ret = -EINVAL;
1608 }
1609
1610 if (*status & FE_HAS_SYNC) {
1611 c->cnr.len = 1;
1612 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
1613 c->cnr.stat[0].svalue = lgdt3306a_calculate_snr_x100(state) * 10;
1614 } else {
1615 c->cnr.len = 1;
1616 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
1617 }
1618 }
1619 return ret;
1620 }
1621
1622
lgdt3306a_read_snr(struct dvb_frontend * fe,u16 * snr)1623 static int lgdt3306a_read_snr(struct dvb_frontend *fe, u16 *snr)
1624 {
1625 struct lgdt3306a_state *state = fe->demodulator_priv;
1626
1627 state->snr = lgdt3306a_calculate_snr_x100(state);
1628 /* report SNR in dB * 10 */
1629 *snr = state->snr/10;
1630
1631 return 0;
1632 }
1633
lgdt3306a_read_signal_strength(struct dvb_frontend * fe,u16 * strength)1634 static int lgdt3306a_read_signal_strength(struct dvb_frontend *fe,
1635 u16 *strength)
1636 {
1637 /*
1638 * Calculate some sort of "strength" from SNR
1639 */
1640 struct lgdt3306a_state *state = fe->demodulator_priv;
1641 u8 val;
1642 u16 snr; /* snr_x10 */
1643 int ret;
1644 u32 ref_snr; /* snr*100 */
1645 u32 str;
1646
1647 *strength = 0;
1648
1649 switch (state->current_modulation) {
1650 case VSB_8:
1651 ref_snr = 1600; /* 16dB */
1652 break;
1653 case QAM_64:
1654 case QAM_256:
1655 case QAM_AUTO:
1656 /* need to know actual modulation to set proper SNR baseline */
1657 ret = lgdt3306a_read_reg(state, 0x00a6, &val);
1658 if (lg_chkerr(ret))
1659 goto fail;
1660
1661 if(val & 0x04)
1662 ref_snr = 2800; /* QAM-256 28dB */
1663 else
1664 ref_snr = 2200; /* QAM-64 22dB */
1665 break;
1666 default:
1667 return -EINVAL;
1668 }
1669
1670 ret = fe->ops.read_snr(fe, &snr);
1671 if (lg_chkerr(ret))
1672 goto fail;
1673
1674 if (state->snr <= (ref_snr - 100))
1675 str = 0;
1676 else if (state->snr <= ref_snr)
1677 str = (0xffff * 65) / 100; /* 65% */
1678 else {
1679 str = state->snr - ref_snr;
1680 str /= 50;
1681 str += 78; /* 78%-100% */
1682 if (str > 100)
1683 str = 100;
1684 str = (0xffff * str) / 100;
1685 }
1686 *strength = (u16)str;
1687 dbg_info("strength=%u\n", *strength);
1688
1689 fail:
1690 return ret;
1691 }
1692
1693 /* ------------------------------------------------------------------------ */
1694
lgdt3306a_read_ber(struct dvb_frontend * fe,u32 * ber)1695 static int lgdt3306a_read_ber(struct dvb_frontend *fe, u32 *ber)
1696 {
1697 struct lgdt3306a_state *state = fe->demodulator_priv;
1698 u32 tmp;
1699
1700 *ber = 0;
1701 #if 1
1702 /* FGR - FIXME - I don't know what value is expected by dvb_core
1703 * what is the scale of the value?? */
1704 tmp = read_reg(state, 0x00fc); /* NBERVALUE[24-31] */
1705 tmp = (tmp << 8) | read_reg(state, 0x00fd); /* NBERVALUE[16-23] */
1706 tmp = (tmp << 8) | read_reg(state, 0x00fe); /* NBERVALUE[8-15] */
1707 tmp = (tmp << 8) | read_reg(state, 0x00ff); /* NBERVALUE[0-7] */
1708 *ber = tmp;
1709 dbg_info("ber=%u\n", tmp);
1710 #endif
1711 return 0;
1712 }
1713
lgdt3306a_read_ucblocks(struct dvb_frontend * fe,u32 * ucblocks)1714 static int lgdt3306a_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
1715 {
1716 struct lgdt3306a_state *state = fe->demodulator_priv;
1717
1718 *ucblocks = 0;
1719 #if 1
1720 /* FGR - FIXME - I don't know what value is expected by dvb_core
1721 * what happens when value wraps? */
1722 *ucblocks = read_reg(state, 0x00f4); /* TPIFTPERRCNT[0-7] */
1723 dbg_info("ucblocks=%u\n", *ucblocks);
1724 #endif
1725
1726 return 0;
1727 }
1728
lgdt3306a_tune(struct dvb_frontend * fe,bool re_tune,unsigned int mode_flags,unsigned int * delay,enum fe_status * status)1729 static int lgdt3306a_tune(struct dvb_frontend *fe, bool re_tune,
1730 unsigned int mode_flags, unsigned int *delay,
1731 enum fe_status *status)
1732 {
1733 int ret = 0;
1734 struct lgdt3306a_state *state = fe->demodulator_priv;
1735
1736 dbg_info("re_tune=%u\n", re_tune);
1737
1738 if (re_tune) {
1739 state->current_frequency = -1; /* force re-tune */
1740 ret = lgdt3306a_set_parameters(fe);
1741 if (ret != 0)
1742 return ret;
1743 }
1744 *delay = 125;
1745 ret = lgdt3306a_read_status(fe, status);
1746
1747 return ret;
1748 }
1749
lgdt3306a_get_tune_settings(struct dvb_frontend * fe,struct dvb_frontend_tune_settings * fe_tune_settings)1750 static int lgdt3306a_get_tune_settings(struct dvb_frontend *fe,
1751 struct dvb_frontend_tune_settings
1752 *fe_tune_settings)
1753 {
1754 fe_tune_settings->min_delay_ms = 100;
1755 dbg_info("\n");
1756 return 0;
1757 }
1758
lgdt3306a_search(struct dvb_frontend * fe)1759 static enum dvbfe_search lgdt3306a_search(struct dvb_frontend *fe)
1760 {
1761 enum fe_status status = 0;
1762 int ret;
1763
1764 /* set frontend */
1765 ret = lgdt3306a_set_parameters(fe);
1766 if (ret)
1767 goto error;
1768
1769 ret = lgdt3306a_read_status(fe, &status);
1770 if (ret)
1771 goto error;
1772
1773 /* check if we have a valid signal */
1774 if (status & FE_HAS_LOCK)
1775 return DVBFE_ALGO_SEARCH_SUCCESS;
1776 else
1777 return DVBFE_ALGO_SEARCH_AGAIN;
1778
1779 error:
1780 dbg_info("failed (%d)\n", ret);
1781 return DVBFE_ALGO_SEARCH_ERROR;
1782 }
1783
lgdt3306a_release(struct dvb_frontend * fe)1784 static void lgdt3306a_release(struct dvb_frontend *fe)
1785 {
1786 struct lgdt3306a_state *state = fe->demodulator_priv;
1787
1788 dbg_info("\n");
1789 kfree(state);
1790 }
1791
1792 static const struct dvb_frontend_ops lgdt3306a_ops;
1793
lgdt3306a_attach(const struct lgdt3306a_config * config,struct i2c_adapter * i2c_adap)1794 struct dvb_frontend *lgdt3306a_attach(const struct lgdt3306a_config *config,
1795 struct i2c_adapter *i2c_adap)
1796 {
1797 struct lgdt3306a_state *state = NULL;
1798 int ret;
1799 u8 val;
1800
1801 dbg_info("(%d-%04x)\n",
1802 i2c_adap ? i2c_adapter_id(i2c_adap) : 0,
1803 config ? config->i2c_addr : 0);
1804
1805 state = kzalloc(sizeof(struct lgdt3306a_state), GFP_KERNEL);
1806 if (state == NULL)
1807 goto fail;
1808
1809 state->cfg = config;
1810 state->i2c_adap = i2c_adap;
1811
1812 memcpy(&state->frontend.ops, &lgdt3306a_ops,
1813 sizeof(struct dvb_frontend_ops));
1814 state->frontend.demodulator_priv = state;
1815
1816 /* verify that we're talking to a lg3306a */
1817 /* FGR - NOTE - there is no obvious ChipId to check; we check
1818 * some "known" bits after reset, but it's still just a guess */
1819 ret = lgdt3306a_read_reg(state, 0x0000, &val);
1820 if (lg_chkerr(ret))
1821 goto fail;
1822 if ((val & 0x74) != 0x74) {
1823 pr_warn("expected 0x74, got 0x%x\n", (val & 0x74));
1824 #if 0
1825 /* FIXME - re-enable when we know this is right */
1826 goto fail;
1827 #endif
1828 }
1829 ret = lgdt3306a_read_reg(state, 0x0001, &val);
1830 if (lg_chkerr(ret))
1831 goto fail;
1832 if ((val & 0xf6) != 0xc6) {
1833 pr_warn("expected 0xc6, got 0x%x\n", (val & 0xf6));
1834 #if 0
1835 /* FIXME - re-enable when we know this is right */
1836 goto fail;
1837 #endif
1838 }
1839 ret = lgdt3306a_read_reg(state, 0x0002, &val);
1840 if (lg_chkerr(ret))
1841 goto fail;
1842 if ((val & 0x73) != 0x03) {
1843 pr_warn("expected 0x03, got 0x%x\n", (val & 0x73));
1844 #if 0
1845 /* FIXME - re-enable when we know this is right */
1846 goto fail;
1847 #endif
1848 }
1849
1850 state->current_frequency = -1;
1851 state->current_modulation = -1;
1852
1853 lgdt3306a_sleep(state);
1854
1855 return &state->frontend;
1856
1857 fail:
1858 pr_warn("unable to detect LGDT3306A hardware\n");
1859 kfree(state);
1860 return NULL;
1861 }
1862 EXPORT_SYMBOL_GPL(lgdt3306a_attach);
1863
1864 #ifdef DBG_DUMP
1865
1866 static const short regtab[] = {
1867 0x0000, /* SOFTRSTB 1'b1 1'b1 1'b1 ADCPDB 1'b1 PLLPDB GBBPDB 11111111 */
1868 0x0001, /* 1'b1 1'b1 1'b0 1'b0 AUTORPTRS */
1869 0x0002, /* NI2CRPTEN 1'b0 1'b0 1'b0 SPECINVAUT */
1870 0x0003, /* AGCRFOUT */
1871 0x0004, /* ADCSEL1V ADCCNT ADCCNF ADCCNS ADCCLKPLL */
1872 0x0005, /* PLLINDIVSE */
1873 0x0006, /* PLLCTRL[7:0] 11100001 */
1874 0x0007, /* SYSINITWAITTIME[7:0] (msec) 00001000 */
1875 0x0008, /* STDOPMODE[7:0] 10000000 */
1876 0x0009, /* 1'b0 1'b0 1'b0 STDOPDETTMODE[2:0] STDOPDETCMODE[1:0] 00011110 */
1877 0x000a, /* DAFTEN 1'b1 x x SCSYSLOCK */
1878 0x000b, /* SCSYSLOCKCHKTIME[7:0] (10msec) 01100100 */
1879 0x000d, /* x SAMPLING4 */
1880 0x000e, /* SAMFREQ[15:8] 00000000 */
1881 0x000f, /* SAMFREQ[7:0] 00000000 */
1882 0x0010, /* IFFREQ[15:8] 01100000 */
1883 0x0011, /* IFFREQ[7:0] 00000000 */
1884 0x0012, /* AGCEN AGCREFMO */
1885 0x0013, /* AGCRFFIXB AGCIFFIXB AGCLOCKDETRNGSEL[1:0] 1'b1 1'b0 1'b0 1'b0 11101000 */
1886 0x0014, /* AGCFIXVALUE[7:0] 01111111 */
1887 0x0015, /* AGCREF[15:8] 00001010 */
1888 0x0016, /* AGCREF[7:0] 11100100 */
1889 0x0017, /* AGCDELAY[7:0] 00100000 */
1890 0x0018, /* AGCRFBW[3:0] AGCIFBW[3:0] 10001000 */
1891 0x0019, /* AGCUDOUTMODE[1:0] AGCUDCTRLLEN[1:0] AGCUDCTRL */
1892 0x001c, /* 1'b1 PFEN MFEN AICCVSYNC */
1893 0x001d, /* 1'b0 1'b1 1'b0 1'b1 AICCVSYNC */
1894 0x001e, /* AICCALPHA[3:0] 1'b1 1'b0 1'b1 1'b0 01111010 */
1895 0x001f, /* AICCDETTH[19:16] AICCOFFTH[19:16] 00000000 */
1896 0x0020, /* AICCDETTH[15:8] 01111100 */
1897 0x0021, /* AICCDETTH[7:0] 00000000 */
1898 0x0022, /* AICCOFFTH[15:8] 00000101 */
1899 0x0023, /* AICCOFFTH[7:0] 11100000 */
1900 0x0024, /* AICCOPMODE3[1:0] AICCOPMODE2[1:0] AICCOPMODE1[1:0] AICCOPMODE0[1:0] 00000000 */
1901 0x0025, /* AICCFIXFREQ3[23:16] 00000000 */
1902 0x0026, /* AICCFIXFREQ3[15:8] 00000000 */
1903 0x0027, /* AICCFIXFREQ3[7:0] 00000000 */
1904 0x0028, /* AICCFIXFREQ2[23:16] 00000000 */
1905 0x0029, /* AICCFIXFREQ2[15:8] 00000000 */
1906 0x002a, /* AICCFIXFREQ2[7:0] 00000000 */
1907 0x002b, /* AICCFIXFREQ1[23:16] 00000000 */
1908 0x002c, /* AICCFIXFREQ1[15:8] 00000000 */
1909 0x002d, /* AICCFIXFREQ1[7:0] 00000000 */
1910 0x002e, /* AICCFIXFREQ0[23:16] 00000000 */
1911 0x002f, /* AICCFIXFREQ0[15:8] 00000000 */
1912 0x0030, /* AICCFIXFREQ0[7:0] 00000000 */
1913 0x0031, /* 1'b0 1'b1 1'b0 1'b0 x DAGC1STER */
1914 0x0032, /* DAGC1STEN DAGC1STER */
1915 0x0033, /* DAGC1STREF[15:8] 00001010 */
1916 0x0034, /* DAGC1STREF[7:0] 11100100 */
1917 0x0035, /* DAGC2NDE */
1918 0x0036, /* DAGC2NDREF[15:8] 00001010 */
1919 0x0037, /* DAGC2NDREF[7:0] 10000000 */
1920 0x0038, /* DAGC2NDLOCKDETRNGSEL[1:0] */
1921 0x003d, /* 1'b1 SAMGEARS */
1922 0x0040, /* SAMLFGMA */
1923 0x0041, /* SAMLFBWM */
1924 0x0044, /* 1'b1 CRGEARSHE */
1925 0x0045, /* CRLFGMAN */
1926 0x0046, /* CFLFBWMA */
1927 0x0047, /* CRLFGMAN */
1928 0x0048, /* x x x x CRLFGSTEP_VS[3:0] xxxx1001 */
1929 0x0049, /* CRLFBWMA */
1930 0x004a, /* CRLFBWMA */
1931 0x0050, /* 1'b0 1'b1 1'b1 1'b0 MSECALCDA */
1932 0x0070, /* TPOUTEN TPIFEN TPCLKOUTE */
1933 0x0071, /* TPSENB TPSSOPBITE */
1934 0x0073, /* TP47HINS x x CHBERINT PERMODE[1:0] PERINT[1:0] 1xx11100 */
1935 0x0075, /* x x x x x IQSWAPCTRL[2:0] xxxxx000 */
1936 0x0076, /* NBERCON NBERST NBERPOL NBERWSYN */
1937 0x0077, /* x NBERLOSTTH[2:0] NBERACQTH[3:0] x0000000 */
1938 0x0078, /* NBERPOLY[31:24] 00000000 */
1939 0x0079, /* NBERPOLY[23:16] 00000000 */
1940 0x007a, /* NBERPOLY[15:8] 00000000 */
1941 0x007b, /* NBERPOLY[7:0] 00000000 */
1942 0x007c, /* NBERPED[31:24] 00000000 */
1943 0x007d, /* NBERPED[23:16] 00000000 */
1944 0x007e, /* NBERPED[15:8] 00000000 */
1945 0x007f, /* NBERPED[7:0] 00000000 */
1946 0x0080, /* x AGCLOCK DAGCLOCK SYSLOCK x x NEVERLOCK[1:0] */
1947 0x0085, /* SPECINVST */
1948 0x0088, /* SYSLOCKTIME[15:8] */
1949 0x0089, /* SYSLOCKTIME[7:0] */
1950 0x008c, /* FECLOCKTIME[15:8] */
1951 0x008d, /* FECLOCKTIME[7:0] */
1952 0x008e, /* AGCACCOUT[15:8] */
1953 0x008f, /* AGCACCOUT[7:0] */
1954 0x0090, /* AICCREJSTATUS[3:0] AICCREJBUSY[3:0] */
1955 0x0091, /* AICCVSYNC */
1956 0x009c, /* CARRFREQOFFSET[15:8] */
1957 0x009d, /* CARRFREQOFFSET[7:0] */
1958 0x00a1, /* SAMFREQOFFSET[23:16] */
1959 0x00a2, /* SAMFREQOFFSET[15:8] */
1960 0x00a3, /* SAMFREQOFFSET[7:0] */
1961 0x00a6, /* SYNCLOCK SYNCLOCKH */
1962 #if 0 /* covered elsewhere */
1963 0x00e8, /* CONSTPWR[15:8] */
1964 0x00e9, /* CONSTPWR[7:0] */
1965 0x00ea, /* BMSE[15:8] */
1966 0x00eb, /* BMSE[7:0] */
1967 0x00ec, /* MSE[15:8] */
1968 0x00ed, /* MSE[7:0] */
1969 0x00ee, /* CONSTI[7:0] */
1970 0x00ef, /* CONSTQ[7:0] */
1971 #endif
1972 0x00f4, /* TPIFTPERRCNT[7:0] */
1973 0x00f5, /* TPCORREC */
1974 0x00f6, /* VBBER[15:8] */
1975 0x00f7, /* VBBER[7:0] */
1976 0x00f8, /* VABER[15:8] */
1977 0x00f9, /* VABER[7:0] */
1978 0x00fa, /* TPERRCNT[7:0] */
1979 0x00fb, /* NBERLOCK x x x x x x x */
1980 0x00fc, /* NBERVALUE[31:24] */
1981 0x00fd, /* NBERVALUE[23:16] */
1982 0x00fe, /* NBERVALUE[15:8] */
1983 0x00ff, /* NBERVALUE[7:0] */
1984 0x1000, /* 1'b0 WODAGCOU */
1985 0x1005, /* x x 1'b1 1'b1 x SRD_Q_QM */
1986 0x1009, /* SRDWAITTIME[7:0] (10msec) 00100011 */
1987 0x100a, /* SRDWAITTIME_CQS[7:0] (msec) 01100100 */
1988 0x101a, /* x 1'b1 1'b0 1'b0 x QMDQAMMODE[2:0] x100x010 */
1989 0x1036, /* 1'b0 1'b1 1'b0 1'b0 SAMGSEND_CQS[3:0] 01001110 */
1990 0x103c, /* SAMGSAUTOSTL_V[3:0] SAMGSAUTOEDL_V[3:0] 01000110 */
1991 0x103d, /* 1'b1 1'b1 SAMCNORMBP_V[1:0] 1'b0 1'b0 SAMMODESEL_V[1:0] 11100001 */
1992 0x103f, /* SAMZTEDSE */
1993 0x105d, /* EQSTATUSE */
1994 0x105f, /* x PMAPG2_V[2:0] x DMAPG2_V[2:0] x001x011 */
1995 0x1060, /* 1'b1 EQSTATUSE */
1996 0x1061, /* CRMAPBWSTL_V[3:0] CRMAPBWEDL_V[3:0] 00000100 */
1997 0x1065, /* 1'b0 x CRMODE_V[1:0] 1'b1 x 1'b1 x 0x111x1x */
1998 0x1066, /* 1'b0 1'b0 1'b1 1'b0 1'b1 PNBOOSTSE */
1999 0x1068, /* CREPHNGAIN2_V[3:0] CREPHNPBW_V[3:0] 10010001 */
2000 0x106e, /* x x x x x CREPHNEN_ */
2001 0x106f, /* CREPHNTH_V[7:0] 00010101 */
2002 0x1072, /* CRSWEEPN */
2003 0x1073, /* CRPGAIN_V[3:0] x x 1'b1 1'b1 1001xx11 */
2004 0x1074, /* CRPBW_V[3:0] x x 1'b1 1'b1 0001xx11 */
2005 0x1080, /* DAFTSTATUS[1:0] x x x x x x */
2006 0x1081, /* SRDSTATUS[1:0] x x x x x SRDLOCK */
2007 0x10a9, /* EQSTATUS_CQS[1:0] x x x x x x */
2008 0x10b7, /* EQSTATUS_V[1:0] x x x x x x */
2009 #if 0 /* SMART_ANT */
2010 0x1f00, /* MODEDETE */
2011 0x1f01, /* x x x x x x x SFNRST xxxxxxx0 */
2012 0x1f03, /* NUMOFANT[7:0] 10000000 */
2013 0x1f04, /* x SELMASK[6:0] x0000000 */
2014 0x1f05, /* x SETMASK[6:0] x0000000 */
2015 0x1f06, /* x TXDATA[6:0] x0000000 */
2016 0x1f07, /* x CHNUMBER[6:0] x0000000 */
2017 0x1f09, /* AGCTIME[23:16] 10011000 */
2018 0x1f0a, /* AGCTIME[15:8] 10010110 */
2019 0x1f0b, /* AGCTIME[7:0] 10000000 */
2020 0x1f0c, /* ANTTIME[31:24] 00000000 */
2021 0x1f0d, /* ANTTIME[23:16] 00000011 */
2022 0x1f0e, /* ANTTIME[15:8] 10010000 */
2023 0x1f0f, /* ANTTIME[7:0] 10010000 */
2024 0x1f11, /* SYNCTIME[23:16] 10011000 */
2025 0x1f12, /* SYNCTIME[15:8] 10010110 */
2026 0x1f13, /* SYNCTIME[7:0] 10000000 */
2027 0x1f14, /* SNRTIME[31:24] 00000001 */
2028 0x1f15, /* SNRTIME[23:16] 01111101 */
2029 0x1f16, /* SNRTIME[15:8] 01111000 */
2030 0x1f17, /* SNRTIME[7:0] 01000000 */
2031 0x1f19, /* FECTIME[23:16] 00000000 */
2032 0x1f1a, /* FECTIME[15:8] 01110010 */
2033 0x1f1b, /* FECTIME[7:0] 01110000 */
2034 0x1f1d, /* FECTHD[7:0] 00000011 */
2035 0x1f1f, /* SNRTHD[23:16] 00001000 */
2036 0x1f20, /* SNRTHD[15:8] 01111111 */
2037 0x1f21, /* SNRTHD[7:0] 10000101 */
2038 0x1f80, /* IRQFLG x x SFSDRFLG MODEBFLG SAVEFLG SCANFLG TRACKFLG */
2039 0x1f81, /* x SYNCCON SNRCON FECCON x STDBUSY SYNCRST AGCFZCO */
2040 0x1f82, /* x x x SCANOPCD[4:0] */
2041 0x1f83, /* x x x x MAINOPCD[3:0] */
2042 0x1f84, /* x x RXDATA[13:8] */
2043 0x1f85, /* RXDATA[7:0] */
2044 0x1f86, /* x x SDTDATA[13:8] */
2045 0x1f87, /* SDTDATA[7:0] */
2046 0x1f89, /* ANTSNR[23:16] */
2047 0x1f8a, /* ANTSNR[15:8] */
2048 0x1f8b, /* ANTSNR[7:0] */
2049 0x1f8c, /* x x x x ANTFEC[13:8] */
2050 0x1f8d, /* ANTFEC[7:0] */
2051 0x1f8e, /* MAXCNT[7:0] */
2052 0x1f8f, /* SCANCNT[7:0] */
2053 0x1f91, /* MAXPW[23:16] */
2054 0x1f92, /* MAXPW[15:8] */
2055 0x1f93, /* MAXPW[7:0] */
2056 0x1f95, /* CURPWMSE[23:16] */
2057 0x1f96, /* CURPWMSE[15:8] */
2058 0x1f97, /* CURPWMSE[7:0] */
2059 #endif /* SMART_ANT */
2060 0x211f, /* 1'b1 1'b1 1'b1 CIRQEN x x 1'b0 1'b0 1111xx00 */
2061 0x212a, /* EQAUTOST */
2062 0x2122, /* CHFAST[7:0] 01100000 */
2063 0x212b, /* FFFSTEP_V[3:0] x FBFSTEP_V[2:0] 0001x001 */
2064 0x212c, /* PHDEROTBWSEL[3:0] 1'b1 1'b1 1'b1 1'b0 10001110 */
2065 0x212d, /* 1'b1 1'b1 1'b1 1'b1 x x TPIFLOCKS */
2066 0x2135, /* DYNTRACKFDEQ[3:0] x 1'b0 1'b0 1'b0 1010x000 */
2067 0x2141, /* TRMODE[1:0] 1'b1 1'b1 1'b0 1'b1 1'b1 1'b1 01110111 */
2068 0x2162, /* AICCCTRLE */
2069 0x2173, /* PHNCNFCNT[7:0] 00000100 */
2070 0x2179, /* 1'b0 1'b0 1'b0 1'b1 x BADSINGLEDYNTRACKFBF[2:0] 0001x001 */
2071 0x217a, /* 1'b0 1'b0 1'b0 1'b1 x BADSLOWSINGLEDYNTRACKFBF[2:0] 0001x001 */
2072 0x217e, /* CNFCNTTPIF[7:0] 00001000 */
2073 0x217f, /* TPERRCNTTPIF[7:0] 00000001 */
2074 0x2180, /* x x x x x x FBDLYCIR[9:8] */
2075 0x2181, /* FBDLYCIR[7:0] */
2076 0x2185, /* MAXPWRMAIN[7:0] */
2077 0x2191, /* NCOMBDET x x x x x x x */
2078 0x2199, /* x MAINSTRON */
2079 0x219a, /* FFFEQSTEPOUT_V[3:0] FBFSTEPOUT_V[2:0] */
2080 0x21a1, /* x x SNRREF[5:0] */
2081 0x2845, /* 1'b0 1'b1 x x FFFSTEP_CQS[1:0] FFFCENTERTAP[1:0] 01xx1110 */
2082 0x2846, /* 1'b0 x 1'b0 1'b1 FBFSTEP_CQS[1:0] 1'b1 1'b0 0x011110 */
2083 0x2847, /* ENNOSIGDE */
2084 0x2849, /* 1'b1 1'b1 NOUSENOSI */
2085 0x284a, /* EQINITWAITTIME[7:0] 01100100 */
2086 0x3000, /* 1'b1 1'b1 1'b1 x x x 1'b0 RPTRSTM */
2087 0x3001, /* RPTRSTWAITTIME[7:0] (100msec) 00110010 */
2088 0x3031, /* FRAMELOC */
2089 0x3032, /* 1'b1 1'b0 1'b0 1'b0 x x FRAMELOCKMODE_CQS[1:0] 1000xx11 */
2090 0x30a9, /* VDLOCK_Q FRAMELOCK */
2091 0x30aa, /* MPEGLOCK */
2092 };
2093
2094 #define numDumpRegs (ARRAY_SIZE(regtab))
2095 static u8 regval1[numDumpRegs] = {0, };
2096 static u8 regval2[numDumpRegs] = {0, };
2097
lgdt3306a_DumpAllRegs(struct lgdt3306a_state * state)2098 static void lgdt3306a_DumpAllRegs(struct lgdt3306a_state *state)
2099 {
2100 memset(regval2, 0xff, sizeof(regval2));
2101 lgdt3306a_DumpRegs(state);
2102 }
2103
lgdt3306a_DumpRegs(struct lgdt3306a_state * state)2104 static void lgdt3306a_DumpRegs(struct lgdt3306a_state *state)
2105 {
2106 int i;
2107 int sav_debug = debug;
2108
2109 if ((debug & DBG_DUMP) == 0)
2110 return;
2111 debug &= ~DBG_REG; /* suppress DBG_REG during reg dump */
2112
2113 lg_debug("\n");
2114
2115 for (i = 0; i < numDumpRegs; i++) {
2116 lgdt3306a_read_reg(state, regtab[i], ®val1[i]);
2117 if (regval1[i] != regval2[i]) {
2118 lg_debug(" %04X = %02X\n", regtab[i], regval1[i]);
2119 regval2[i] = regval1[i];
2120 }
2121 }
2122 debug = sav_debug;
2123 }
2124 #endif /* DBG_DUMP */
2125
2126
2127
2128 static const struct dvb_frontend_ops lgdt3306a_ops = {
2129 .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B },
2130 .info = {
2131 .name = "LG Electronics LGDT3306A VSB/QAM Frontend",
2132 .frequency_min_hz = 54 * MHz,
2133 .frequency_max_hz = 858 * MHz,
2134 .frequency_stepsize_hz = 62500,
2135 .caps = FE_CAN_QAM_AUTO | FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB
2136 },
2137 .i2c_gate_ctrl = lgdt3306a_i2c_gate_ctrl,
2138 .init = lgdt3306a_init,
2139 .sleep = lgdt3306a_fe_sleep,
2140 /* if this is set, it overrides the default swzigzag */
2141 .tune = lgdt3306a_tune,
2142 .set_frontend = lgdt3306a_set_parameters,
2143 .get_frontend = lgdt3306a_get_frontend,
2144 .get_frontend_algo = lgdt3306a_get_frontend_algo,
2145 .get_tune_settings = lgdt3306a_get_tune_settings,
2146 .read_status = lgdt3306a_read_status,
2147 .read_ber = lgdt3306a_read_ber,
2148 .read_signal_strength = lgdt3306a_read_signal_strength,
2149 .read_snr = lgdt3306a_read_snr,
2150 .read_ucblocks = lgdt3306a_read_ucblocks,
2151 .release = lgdt3306a_release,
2152 .ts_bus_ctrl = lgdt3306a_ts_bus_ctrl,
2153 .search = lgdt3306a_search,
2154 };
2155
lgdt3306a_select(struct i2c_mux_core * muxc,u32 chan)2156 static int lgdt3306a_select(struct i2c_mux_core *muxc, u32 chan)
2157 {
2158 struct i2c_client *client = i2c_mux_priv(muxc);
2159 struct lgdt3306a_state *state = i2c_get_clientdata(client);
2160
2161 return lgdt3306a_i2c_gate_ctrl(&state->frontend, 1);
2162 }
2163
lgdt3306a_deselect(struct i2c_mux_core * muxc,u32 chan)2164 static int lgdt3306a_deselect(struct i2c_mux_core *muxc, u32 chan)
2165 {
2166 struct i2c_client *client = i2c_mux_priv(muxc);
2167 struct lgdt3306a_state *state = i2c_get_clientdata(client);
2168
2169 return lgdt3306a_i2c_gate_ctrl(&state->frontend, 0);
2170 }
2171
lgdt3306a_probe(struct i2c_client * client)2172 static int lgdt3306a_probe(struct i2c_client *client)
2173 {
2174 struct lgdt3306a_config *config;
2175 struct lgdt3306a_state *state;
2176 struct dvb_frontend *fe;
2177 int ret;
2178
2179 config = kmemdup(client->dev.platform_data,
2180 sizeof(struct lgdt3306a_config), GFP_KERNEL);
2181 if (config == NULL) {
2182 ret = -ENOMEM;
2183 goto fail;
2184 }
2185
2186 config->i2c_addr = client->addr;
2187 fe = lgdt3306a_attach(config, client->adapter);
2188 if (fe == NULL) {
2189 ret = -ENODEV;
2190 goto err_fe;
2191 }
2192
2193 i2c_set_clientdata(client, fe->demodulator_priv);
2194 state = fe->demodulator_priv;
2195 state->frontend.ops.release = NULL;
2196
2197 /* create mux i2c adapter for tuner */
2198 state->muxc = i2c_mux_alloc(client->adapter, &client->dev,
2199 1, 0, I2C_MUX_LOCKED,
2200 lgdt3306a_select, lgdt3306a_deselect);
2201 if (!state->muxc) {
2202 ret = -ENOMEM;
2203 goto err_kfree;
2204 }
2205 state->muxc->priv = client;
2206 ret = i2c_mux_add_adapter(state->muxc, 0, 0, 0);
2207 if (ret)
2208 goto err_kfree;
2209
2210 /* create dvb_frontend */
2211 fe->ops.i2c_gate_ctrl = NULL;
2212 *config->i2c_adapter = state->muxc->adapter[0];
2213 *config->fe = fe;
2214
2215 dev_info(&client->dev, "LG Electronics LGDT3306A successfully identified\n");
2216
2217 return 0;
2218
2219 err_kfree:
2220 kfree(state);
2221 err_fe:
2222 kfree(config);
2223 fail:
2224 dev_warn(&client->dev, "probe failed = %d\n", ret);
2225 return ret;
2226 }
2227
lgdt3306a_remove(struct i2c_client * client)2228 static void lgdt3306a_remove(struct i2c_client *client)
2229 {
2230 struct lgdt3306a_state *state = i2c_get_clientdata(client);
2231
2232 i2c_mux_del_adapters(state->muxc);
2233
2234 state->frontend.ops.release = NULL;
2235 state->frontend.demodulator_priv = NULL;
2236
2237 kfree(state->cfg);
2238 kfree(state);
2239 }
2240
2241 static const struct i2c_device_id lgdt3306a_id_table[] = {
2242 {"lgdt3306a", 0},
2243 {}
2244 };
2245 MODULE_DEVICE_TABLE(i2c, lgdt3306a_id_table);
2246
2247 static struct i2c_driver lgdt3306a_driver = {
2248 .driver = {
2249 .name = "lgdt3306a",
2250 .suppress_bind_attrs = true,
2251 },
2252 .probe = lgdt3306a_probe,
2253 .remove = lgdt3306a_remove,
2254 .id_table = lgdt3306a_id_table,
2255 };
2256
2257 module_i2c_driver(lgdt3306a_driver);
2258
2259 MODULE_DESCRIPTION("LG Electronics LGDT3306A ATSC/QAM-B Demodulator Driver");
2260 MODULE_AUTHOR("Fred Richter <frichter@hauppauge.com>");
2261 MODULE_LICENSE("GPL");
2262 MODULE_VERSION("0.2");
2263