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[pohmelfs.git] / drivers / media / dvb / frontends / lgdt3305.c
blob1d2c47378cf856b392534dd2b4599de7d3ac344f
1 /*
2 * Support for LG Electronics LGDT3304 and LGDT3305 - VSB/QAM
3 *
4 * Copyright (C) 2008, 2009, 2010 Michael Krufky <mkrufky@linuxtv.org>
5 *
6 * LGDT3304 support by Jarod Wilson <jarod@redhat.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 *
22 */
23
24 #include <asm/div64.h>
25 #include <linux/dvb/frontend.h>
26 #include <linux/slab.h>
27 #include "dvb_math.h"
28 #include "lgdt3305.h"
29
30 static int debug;
31 module_param(debug, int, 0644);
32 MODULE_PARM_DESC(debug, "set debug level (info=1, reg=2 (or-able))");
33
34 #define DBG_INFO 1
35 #define DBG_REG 2
36
37 #define lg_printk(kern, fmt, arg...) \
38 printk(kern "%s: " fmt, __func__, ##arg)
39
40 #define lg_info(fmt, arg...) printk(KERN_INFO "lgdt3305: " fmt, ##arg)
41 #define lg_warn(fmt, arg...) lg_printk(KERN_WARNING, fmt, ##arg)
42 #define lg_err(fmt, arg...) lg_printk(KERN_ERR, fmt, ##arg)
43 #define lg_dbg(fmt, arg...) if (debug & DBG_INFO) \
44 lg_printk(KERN_DEBUG, fmt, ##arg)
45 #define lg_reg(fmt, arg...) if (debug & DBG_REG) \
46 lg_printk(KERN_DEBUG, fmt, ##arg)
47
48 #define lg_fail(ret) \
49 ({ \
50 int __ret; \
51 __ret = (ret < 0); \
52 if (__ret) \
53 lg_err("error %d on line %d\n", ret, __LINE__); \
54 __ret; \
55 })
56
57 struct lgdt3305_state {
58 struct i2c_adapter *i2c_adap;
59 const struct lgdt3305_config *cfg;
60
61 struct dvb_frontend frontend;
62
63 fe_modulation_t current_modulation;
64 u32 current_frequency;
65 u32 snr;
66 };
67
68 /* ------------------------------------------------------------------------ */
69
70 /* FIXME: verify & document the LGDT3304 registers */
71
72 #define LGDT3305_GEN_CTRL_1 0x0000
73 #define LGDT3305_GEN_CTRL_2 0x0001
74 #define LGDT3305_GEN_CTRL_3 0x0002
75 #define LGDT3305_GEN_STATUS 0x0003
76 #define LGDT3305_GEN_CONTROL 0x0007
77 #define LGDT3305_GEN_CTRL_4 0x000a
78 #define LGDT3305_DGTL_AGC_REF_1 0x0012
79 #define LGDT3305_DGTL_AGC_REF_2 0x0013
80 #define LGDT3305_CR_CTR_FREQ_1 0x0106
81 #define LGDT3305_CR_CTR_FREQ_2 0x0107
82 #define LGDT3305_CR_CTR_FREQ_3 0x0108
83 #define LGDT3305_CR_CTR_FREQ_4 0x0109
84 #define LGDT3305_CR_MSE_1 0x011b
85 #define LGDT3305_CR_MSE_2 0x011c
86 #define LGDT3305_CR_LOCK_STATUS 0x011d
87 #define LGDT3305_CR_CTRL_7 0x0126
88 #define LGDT3305_AGC_POWER_REF_1 0x0300
89 #define LGDT3305_AGC_POWER_REF_2 0x0301
90 #define LGDT3305_AGC_DELAY_PT_1 0x0302
91 #define LGDT3305_AGC_DELAY_PT_2 0x0303
92 #define LGDT3305_RFAGC_LOOP_FLTR_BW_1 0x0306
93 #define LGDT3305_RFAGC_LOOP_FLTR_BW_2 0x0307
94 #define LGDT3305_IFBW_1 0x0308
95 #define LGDT3305_IFBW_2 0x0309
96 #define LGDT3305_AGC_CTRL_1 0x030c
97 #define LGDT3305_AGC_CTRL_4 0x0314
98 #define LGDT3305_EQ_MSE_1 0x0413
99 #define LGDT3305_EQ_MSE_2 0x0414
100 #define LGDT3305_EQ_MSE_3 0x0415
101 #define LGDT3305_PT_MSE_1 0x0417
102 #define LGDT3305_PT_MSE_2 0x0418
103 #define LGDT3305_PT_MSE_3 0x0419
104 #define LGDT3305_FEC_BLOCK_CTRL 0x0504
105 #define LGDT3305_FEC_LOCK_STATUS 0x050a
106 #define LGDT3305_FEC_PKT_ERR_1 0x050c
107 #define LGDT3305_FEC_PKT_ERR_2 0x050d
108 #define LGDT3305_TP_CTRL_1 0x050e
109 #define LGDT3305_BERT_PERIOD 0x0801
110 #define LGDT3305_BERT_ERROR_COUNT_1 0x080a
111 #define LGDT3305_BERT_ERROR_COUNT_2 0x080b
112 #define LGDT3305_BERT_ERROR_COUNT_3 0x080c
113 #define LGDT3305_BERT_ERROR_COUNT_4 0x080d
114
115 static int lgdt3305_write_reg(struct lgdt3305_state *state, u16 reg, u8 val)
116 {
117 int ret;
118 u8 buf[] = { reg >> 8, reg & 0xff, val };
119 struct i2c_msg msg = {
120 .addr = state->cfg->i2c_addr, .flags = 0,
121 .buf = buf, .len = 3,
122 };
123
124 lg_reg("reg: 0x%04x, val: 0x%02x\n", reg, val);
125
126 ret = i2c_transfer(state->i2c_adap, &msg, 1);
127
128 if (ret != 1) {
129 lg_err("error (addr %02x %02x <- %02x, err = %i)\n",
130 msg.buf[0], msg.buf[1], msg.buf[2], ret);
131 if (ret < 0)
132 return ret;
133 else
134 return -EREMOTEIO;
135 }
136 return 0;
137 }
138
139 static int lgdt3305_read_reg(struct lgdt3305_state *state, u16 reg, u8 *val)
140 {
141 int ret;
142 u8 reg_buf[] = { reg >> 8, reg & 0xff };
143 struct i2c_msg msg[] = {
144 { .addr = state->cfg->i2c_addr,
145 .flags = 0, .buf = reg_buf, .len = 2 },
146 { .addr = state->cfg->i2c_addr,
147 .flags = I2C_M_RD, .buf = val, .len = 1 },
148 };
149
150 lg_reg("reg: 0x%04x\n", reg);
151
152 ret = i2c_transfer(state->i2c_adap, msg, 2);
153
154 if (ret != 2) {
155 lg_err("error (addr %02x reg %04x error (ret == %i)\n",
156 state->cfg->i2c_addr, reg, ret);
157 if (ret < 0)
158 return ret;
159 else
160 return -EREMOTEIO;
161 }
162 return 0;
163 }
164
165 #define read_reg(state, reg) \
166 ({ \
167 u8 __val; \
168 int ret = lgdt3305_read_reg(state, reg, &__val); \
169 if (lg_fail(ret)) \
170 __val = 0; \
171 __val; \
172 })
173
174 static int lgdt3305_set_reg_bit(struct lgdt3305_state *state,
175 u16 reg, int bit, int onoff)
176 {
177 u8 val;
178 int ret;
179
180 lg_reg("reg: 0x%04x, bit: %d, level: %d\n", reg, bit, onoff);
181
182 ret = lgdt3305_read_reg(state, reg, &val);
183 if (lg_fail(ret))
184 goto fail;
185
186 val &= ~(1 << bit);
187 val |= (onoff & 1) << bit;
188
189 ret = lgdt3305_write_reg(state, reg, val);
190 fail:
191 return ret;
192 }
193
194 struct lgdt3305_reg {
195 u16 reg;
196 u8 val;
197 };
198
199 static int lgdt3305_write_regs(struct lgdt3305_state *state,
200 struct lgdt3305_reg *regs, int len)
201 {
202 int i, ret;
203
204 lg_reg("writing %d registers...\n", len);
205
206 for (i = 0; i < len - 1; i++) {
207 ret = lgdt3305_write_reg(state, regs[i].reg, regs[i].val);
208 if (lg_fail(ret))
209 return ret;
210 }
211 return 0;
212 }
213
214 /* ------------------------------------------------------------------------ */
215
216 static int lgdt3305_soft_reset(struct lgdt3305_state *state)
217 {
218 int ret;
219
220 lg_dbg("\n");
221
222 ret = lgdt3305_set_reg_bit(state, LGDT3305_GEN_CTRL_3, 0, 0);
223 if (lg_fail(ret))
224 goto fail;
225
226 msleep(20);
227 ret = lgdt3305_set_reg_bit(state, LGDT3305_GEN_CTRL_3, 0, 1);
228 fail:
229 return ret;
230 }
231
232 static inline int lgdt3305_mpeg_mode(struct lgdt3305_state *state,
233 enum lgdt3305_mpeg_mode mode)
234 {
235 lg_dbg("(%d)\n", mode);
236 return lgdt3305_set_reg_bit(state, LGDT3305_TP_CTRL_1, 5, mode);
237 }
238
239 static int lgdt3305_mpeg_mode_polarity(struct lgdt3305_state *state,
240 enum lgdt3305_tp_clock_edge edge,
241 enum lgdt3305_tp_valid_polarity valid)
242 {
243 u8 val;
244 int ret;
245
246 lg_dbg("edge = %d, valid = %d\n", edge, valid);
247
248 ret = lgdt3305_read_reg(state, LGDT3305_TP_CTRL_1, &val);
249 if (lg_fail(ret))
250 goto fail;
251
252 val &= ~0x09;
253
254 if (edge)
255 val |= 0x08;
256 if (valid)
257 val |= 0x01;
258
259 ret = lgdt3305_write_reg(state, LGDT3305_TP_CTRL_1, val);
260 if (lg_fail(ret))
261 goto fail;
262
263 ret = lgdt3305_soft_reset(state);
264 fail:
265 return ret;
266 }
267
268 static int lgdt3305_set_modulation(struct lgdt3305_state *state,
269 struct dtv_frontend_properties *p)
270 {
271 u8 opermode;
272 int ret;
273
274 lg_dbg("\n");
275
276 ret = lgdt3305_read_reg(state, LGDT3305_GEN_CTRL_1, &opermode);
277 if (lg_fail(ret))
278 goto fail;
279
280 opermode &= ~0x03;
281
282 switch (p->modulation) {
283 case VSB_8:
284 opermode |= 0x03;
285 break;
286 case QAM_64:
287 opermode |= 0x00;
288 break;
289 case QAM_256:
290 opermode |= 0x01;
291 break;
292 default:
293 return -EINVAL;
294 }
295 ret = lgdt3305_write_reg(state, LGDT3305_GEN_CTRL_1, opermode);
296 fail:
297 return ret;
298 }
299
300 static int lgdt3305_set_filter_extension(struct lgdt3305_state *state,
301 struct dtv_frontend_properties *p)
302 {
303 int val;
304
305 switch (p->modulation) {
306 case VSB_8:
307 val = 0;
308 break;
309 case QAM_64:
310 case QAM_256:
311 val = 1;
312 break;
313 default:
314 return -EINVAL;
315 }
316 lg_dbg("val = %d\n", val);
317
318 return lgdt3305_set_reg_bit(state, 0x043f, 2, val);
319 }
320
321 /* ------------------------------------------------------------------------ */
322
323 static int lgdt3305_passband_digital_agc(struct lgdt3305_state *state,
324 struct dtv_frontend_properties *p)
325 {
326 u16 agc_ref;
327
328 switch (p->modulation) {
329 case VSB_8:
330 agc_ref = 0x32c4;
331 break;
332 case QAM_64:
333 agc_ref = 0x2a00;
334 break;
335 case QAM_256:
336 agc_ref = 0x2a80;
337 break;
338 default:
339 return -EINVAL;
340 }
341
342 lg_dbg("agc ref: 0x%04x\n", agc_ref);
343
344 lgdt3305_write_reg(state, LGDT3305_DGTL_AGC_REF_1, agc_ref >> 8);
345 lgdt3305_write_reg(state, LGDT3305_DGTL_AGC_REF_2, agc_ref & 0xff);
346
347 return 0;
348 }
349
350 static int lgdt3305_rfagc_loop(struct lgdt3305_state *state,
351 struct dtv_frontend_properties *p)
352 {
353 u16 ifbw, rfbw, agcdelay;
354
355 switch (p->modulation) {
356 case VSB_8:
357 agcdelay = 0x04c0;
358 rfbw = 0x8000;
359 ifbw = 0x8000;
360 break;
361 case QAM_64:
362 case QAM_256:
363 agcdelay = 0x046b;
364 rfbw = 0x8889;
365 /* FIXME: investigate optimal ifbw & rfbw values for the
366 * DT3304 and re-write this switch..case block */
367 if (state->cfg->demod_chip == LGDT3304)
368 ifbw = 0x6666;
369 else /* (state->cfg->demod_chip == LGDT3305) */
370 ifbw = 0x8888;
371 break;
372 default:
373 return -EINVAL;
374 }
375
376 if (state->cfg->rf_agc_loop) {
377 lg_dbg("agcdelay: 0x%04x, rfbw: 0x%04x\n", agcdelay, rfbw);
378
379 /* rf agc loop filter bandwidth */
380 lgdt3305_write_reg(state, LGDT3305_AGC_DELAY_PT_1,
381 agcdelay >> 8);
382 lgdt3305_write_reg(state, LGDT3305_AGC_DELAY_PT_2,
383 agcdelay & 0xff);
384
385 lgdt3305_write_reg(state, LGDT3305_RFAGC_LOOP_FLTR_BW_1,
386 rfbw >> 8);
387 lgdt3305_write_reg(state, LGDT3305_RFAGC_LOOP_FLTR_BW_2,
388 rfbw & 0xff);
389 } else {
390 lg_dbg("ifbw: 0x%04x\n", ifbw);
391
392 /* if agc loop filter bandwidth */
393 lgdt3305_write_reg(state, LGDT3305_IFBW_1, ifbw >> 8);
394 lgdt3305_write_reg(state, LGDT3305_IFBW_2, ifbw & 0xff);
395 }
396
397 return 0;
398 }
399
400 static int lgdt3305_agc_setup(struct lgdt3305_state *state,
401 struct dtv_frontend_properties *p)
402 {
403 int lockdten, acqen;
404
405 switch (p->modulation) {
406 case VSB_8:
407 lockdten = 0;
408 acqen = 0;
409 break;
410 case QAM_64:
411 case QAM_256:
412 lockdten = 1;
413 acqen = 1;
414 break;
415 default:
416 return -EINVAL;
417 }
418
419 lg_dbg("lockdten = %d, acqen = %d\n", lockdten, acqen);
420
421 /* control agc function */
422 switch (state->cfg->demod_chip) {
423 case LGDT3304:
424 lgdt3305_write_reg(state, 0x0314, 0xe1 | lockdten << 1);
425 lgdt3305_set_reg_bit(state, 0x030e, 2, acqen);
426 break;
427 case LGDT3305:
428 lgdt3305_write_reg(state, LGDT3305_AGC_CTRL_4, 0xe1 | lockdten << 1);
429 lgdt3305_set_reg_bit(state, LGDT3305_AGC_CTRL_1, 2, acqen);
430 break;
431 default:
432 return -EINVAL;
433 }
434
435 return lgdt3305_rfagc_loop(state, p);
436 }
437
438 static int lgdt3305_set_agc_power_ref(struct lgdt3305_state *state,
439 struct dtv_frontend_properties *p)
440 {
441 u16 usref = 0;
442
443 switch (p->modulation) {
444 case VSB_8:
445 if (state->cfg->usref_8vsb)
446 usref = state->cfg->usref_8vsb;
447 break;
448 case QAM_64:
449 if (state->cfg->usref_qam64)
450 usref = state->cfg->usref_qam64;
451 break;
452 case QAM_256:
453 if (state->cfg->usref_qam256)
454 usref = state->cfg->usref_qam256;
455 break;
456 default:
457 return -EINVAL;
458 }
459
460 if (usref) {
461 lg_dbg("set manual mode: 0x%04x\n", usref);
462
463 lgdt3305_set_reg_bit(state, LGDT3305_AGC_CTRL_1, 3, 1);
464
465 lgdt3305_write_reg(state, LGDT3305_AGC_POWER_REF_1,
466 0xff & (usref >> 8));
467 lgdt3305_write_reg(state, LGDT3305_AGC_POWER_REF_2,
468 0xff & (usref >> 0));
469 }
470 return 0;
471 }
472
473 /* ------------------------------------------------------------------------ */
474
475 static int lgdt3305_spectral_inversion(struct lgdt3305_state *state,
476 struct dtv_frontend_properties *p,
477 int inversion)
478 {
479 int ret;
480
481 lg_dbg("(%d)\n", inversion);
482
483 switch (p->modulation) {
484 case VSB_8:
485 ret = lgdt3305_write_reg(state, LGDT3305_CR_CTRL_7,
486 inversion ? 0xf9 : 0x79);
487 break;
488 case QAM_64:
489 case QAM_256:
490 ret = lgdt3305_write_reg(state, LGDT3305_FEC_BLOCK_CTRL,
491 inversion ? 0xfd : 0xff);
492 break;
493 default:
494 ret = -EINVAL;
495 }
496 return ret;
497 }
498
499 static int lgdt3305_set_if(struct lgdt3305_state *state,
500 struct dtv_frontend_properties *p)
501 {
502 u16 if_freq_khz;
503 u8 nco1, nco2, nco3, nco4;
504 u64 nco;
505
506 switch (p->modulation) {
507 case VSB_8:
508 if_freq_khz = state->cfg->vsb_if_khz;
509 break;
510 case QAM_64:
511 case QAM_256:
512 if_freq_khz = state->cfg->qam_if_khz;
513 break;
514 default:
515 return -EINVAL;
516 }
517
518 nco = if_freq_khz / 10;
519
520 switch (p->modulation) {
521 case VSB_8:
522 nco <<= 24;
523 do_div(nco, 625);
524 break;
525 case QAM_64:
526 case QAM_256:
527 nco <<= 28;
528 do_div(nco, 625);
529 break;
530 default:
531 return -EINVAL;
532 }
533
534 nco1 = (nco >> 24) & 0x3f;
535 nco1 |= 0x40;
536 nco2 = (nco >> 16) & 0xff;
537 nco3 = (nco >> 8) & 0xff;
538 nco4 = nco & 0xff;
539
540 lgdt3305_write_reg(state, LGDT3305_CR_CTR_FREQ_1, nco1);
541 lgdt3305_write_reg(state, LGDT3305_CR_CTR_FREQ_2, nco2);
542 lgdt3305_write_reg(state, LGDT3305_CR_CTR_FREQ_3, nco3);
543 lgdt3305_write_reg(state, LGDT3305_CR_CTR_FREQ_4, nco4);
544
545 lg_dbg("%d KHz -> [%02x%02x%02x%02x]\n",
546 if_freq_khz, nco1, nco2, nco3, nco4);
547
548 return 0;
549 }
550
551 /* ------------------------------------------------------------------------ */
552
553 static int lgdt3305_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
554 {
555 struct lgdt3305_state *state = fe->demodulator_priv;
556
557 if (state->cfg->deny_i2c_rptr)
558 return 0;
559
560 lg_dbg("(%d)\n", enable);
561
562 return lgdt3305_set_reg_bit(state, LGDT3305_GEN_CTRL_2, 5,
563 enable ? 0 : 1);
564 }
565
566 static int lgdt3305_sleep(struct dvb_frontend *fe)
567 {
568 struct lgdt3305_state *state = fe->demodulator_priv;
569 u8 gen_ctrl_3, gen_ctrl_4;
570
571 lg_dbg("\n");
572
573 gen_ctrl_3 = read_reg(state, LGDT3305_GEN_CTRL_3);
574 gen_ctrl_4 = read_reg(state, LGDT3305_GEN_CTRL_4);
575
576 /* hold in software reset while sleeping */
577 gen_ctrl_3 &= ~0x01;
578 /* tristate the IF-AGC pin */
579 gen_ctrl_3 |= 0x02;
580 /* tristate the RF-AGC pin */
581 gen_ctrl_3 |= 0x04;
582
583 /* disable vsb/qam module */
584 gen_ctrl_4 &= ~0x01;
585 /* disable adc module */
586 gen_ctrl_4 &= ~0x02;
587
588 lgdt3305_write_reg(state, LGDT3305_GEN_CTRL_3, gen_ctrl_3);
589 lgdt3305_write_reg(state, LGDT3305_GEN_CTRL_4, gen_ctrl_4);
590
591 return 0;
592 }
593
594 static int lgdt3305_init(struct dvb_frontend *fe)
595 {
596 struct lgdt3305_state *state = fe->demodulator_priv;
597 int ret;
598
599 static struct lgdt3305_reg lgdt3304_init_data[] = {
600 { .reg = LGDT3305_GEN_CTRL_1, .val = 0x03, },
601 { .reg = 0x000d, .val = 0x02, },
602 { .reg = 0x000e, .val = 0x02, },
603 { .reg = LGDT3305_DGTL_AGC_REF_1, .val = 0x32, },
604 { .reg = LGDT3305_DGTL_AGC_REF_2, .val = 0xc4, },
605 { .reg = LGDT3305_CR_CTR_FREQ_1, .val = 0x00, },
606 { .reg = LGDT3305_CR_CTR_FREQ_2, .val = 0x00, },
607 { .reg = LGDT3305_CR_CTR_FREQ_3, .val = 0x00, },
608 { .reg = LGDT3305_CR_CTR_FREQ_4, .val = 0x00, },
609 { .reg = LGDT3305_CR_CTRL_7, .val = 0xf9, },
610 { .reg = 0x0112, .val = 0x17, },
611 { .reg = 0x0113, .val = 0x15, },
612 { .reg = 0x0114, .val = 0x18, },
613 { .reg = 0x0115, .val = 0xff, },
614 { .reg = 0x0116, .val = 0x3c, },
615 { .reg = 0x0214, .val = 0x67, },
616 { .reg = 0x0424, .val = 0x8d, },
617 { .reg = 0x0427, .val = 0x12, },
618 { .reg = 0x0428, .val = 0x4f, },
619 { .reg = LGDT3305_IFBW_1, .val = 0x80, },
620 { .reg = LGDT3305_IFBW_2, .val = 0x00, },
621 { .reg = 0x030a, .val = 0x08, },
622 { .reg = 0x030b, .val = 0x9b, },
623 { .reg = 0x030d, .val = 0x00, },
624 { .reg = 0x030e, .val = 0x1c, },
625 { .reg = 0x0314, .val = 0xe1, },
626 { .reg = 0x000d, .val = 0x82, },
627 { .reg = LGDT3305_TP_CTRL_1, .val = 0x5b, },
628 { .reg = LGDT3305_TP_CTRL_1, .val = 0x5b, },
629 };
630
631 static struct lgdt3305_reg lgdt3305_init_data[] = {
632 { .reg = LGDT3305_GEN_CTRL_1, .val = 0x03, },
633 { .reg = LGDT3305_GEN_CTRL_2, .val = 0xb0, },
634 { .reg = LGDT3305_GEN_CTRL_3, .val = 0x01, },
635 { .reg = LGDT3305_GEN_CONTROL, .val = 0x6f, },
636 { .reg = LGDT3305_GEN_CTRL_4, .val = 0x03, },
637 { .reg = LGDT3305_DGTL_AGC_REF_1, .val = 0x32, },
638 { .reg = LGDT3305_DGTL_AGC_REF_2, .val = 0xc4, },
639 { .reg = LGDT3305_CR_CTR_FREQ_1, .val = 0x00, },
640 { .reg = LGDT3305_CR_CTR_FREQ_2, .val = 0x00, },
641 { .reg = LGDT3305_CR_CTR_FREQ_3, .val = 0x00, },
642 { .reg = LGDT3305_CR_CTR_FREQ_4, .val = 0x00, },
643 { .reg = LGDT3305_CR_CTRL_7, .val = 0x79, },
644 { .reg = LGDT3305_AGC_POWER_REF_1, .val = 0x32, },
645 { .reg = LGDT3305_AGC_POWER_REF_2, .val = 0xc4, },
646 { .reg = LGDT3305_AGC_DELAY_PT_1, .val = 0x0d, },
647 { .reg = LGDT3305_AGC_DELAY_PT_2, .val = 0x30, },
648 { .reg = LGDT3305_RFAGC_LOOP_FLTR_BW_1, .val = 0x80, },
649 { .reg = LGDT3305_RFAGC_LOOP_FLTR_BW_2, .val = 0x00, },
650 { .reg = LGDT3305_IFBW_1, .val = 0x80, },
651 { .reg = LGDT3305_IFBW_2, .val = 0x00, },
652 { .reg = LGDT3305_AGC_CTRL_1, .val = 0x30, },
653 { .reg = LGDT3305_AGC_CTRL_4, .val = 0x61, },
654 { .reg = LGDT3305_FEC_BLOCK_CTRL, .val = 0xff, },
655 { .reg = LGDT3305_TP_CTRL_1, .val = 0x1b, },
656 };
657
658 lg_dbg("\n");
659
660 switch (state->cfg->demod_chip) {
661 case LGDT3304:
662 ret = lgdt3305_write_regs(state, lgdt3304_init_data,
663 ARRAY_SIZE(lgdt3304_init_data));
664 break;
665 case LGDT3305:
666 ret = lgdt3305_write_regs(state, lgdt3305_init_data,
667 ARRAY_SIZE(lgdt3305_init_data));
668 break;
669 default:
670 ret = -EINVAL;
671 }
672 if (lg_fail(ret))
673 goto fail;
674
675 ret = lgdt3305_soft_reset(state);
676 fail:
677 return ret;
678 }
679
680 static int lgdt3304_set_parameters(struct dvb_frontend *fe)
681 {
682 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
683 struct lgdt3305_state *state = fe->demodulator_priv;
684 int ret;
685
686 lg_dbg("(%d, %d)\n", p->frequency, p->modulation);
687
688 if (fe->ops.tuner_ops.set_params) {
689 ret = fe->ops.tuner_ops.set_params(fe);
690 if (fe->ops.i2c_gate_ctrl)
691 fe->ops.i2c_gate_ctrl(fe, 0);
692 if (lg_fail(ret))
693 goto fail;
694 state->current_frequency = p->frequency;
695 }
696
697 ret = lgdt3305_set_modulation(state, p);
698 if (lg_fail(ret))
699 goto fail;
700
701 ret = lgdt3305_passband_digital_agc(state, p);
702 if (lg_fail(ret))
703 goto fail;
704
705 ret = lgdt3305_agc_setup(state, p);
706 if (lg_fail(ret))
707 goto fail;
708
709 /* reg 0x030d is 3304-only... seen in vsb and qam usbsnoops... */
710 switch (p->modulation) {
711 case VSB_8:
712 lgdt3305_write_reg(state, 0x030d, 0x00);
713 lgdt3305_write_reg(state, LGDT3305_CR_CTR_FREQ_1, 0x4f);
714 lgdt3305_write_reg(state, LGDT3305_CR_CTR_FREQ_2, 0x0c);
715 lgdt3305_write_reg(state, LGDT3305_CR_CTR_FREQ_3, 0xac);
716 lgdt3305_write_reg(state, LGDT3305_CR_CTR_FREQ_4, 0xba);
717 break;
718 case QAM_64:
719 case QAM_256:
720 lgdt3305_write_reg(state, 0x030d, 0x14);
721 ret = lgdt3305_set_if(state, p);
722 if (lg_fail(ret))
723 goto fail;
724 break;
725 default:
726 return -EINVAL;
727 }
728
729
730 ret = lgdt3305_spectral_inversion(state, p,
731 state->cfg->spectral_inversion
732 ? 1 : 0);
733 if (lg_fail(ret))
734 goto fail;
735
736 state->current_modulation = p->modulation;
737
738 ret = lgdt3305_mpeg_mode(state, state->cfg->mpeg_mode);
739 if (lg_fail(ret))
740 goto fail;
741
742 /* lgdt3305_mpeg_mode_polarity calls lgdt3305_soft_reset */
743 ret = lgdt3305_mpeg_mode_polarity(state,
744 state->cfg->tpclk_edge,
745 state->cfg->tpvalid_polarity);
746 fail:
747 return ret;
748 }
749
750 static int lgdt3305_set_parameters(struct dvb_frontend *fe)
751 {
752 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
753 struct lgdt3305_state *state = fe->demodulator_priv;
754 int ret;
755
756 lg_dbg("(%d, %d)\n", p->frequency, p->modulation);
757
758 if (fe->ops.tuner_ops.set_params) {
759 ret = fe->ops.tuner_ops.set_params(fe);
760 if (fe->ops.i2c_gate_ctrl)
761 fe->ops.i2c_gate_ctrl(fe, 0);
762 if (lg_fail(ret))
763 goto fail;
764 state->current_frequency = p->frequency;
765 }
766
767 ret = lgdt3305_set_modulation(state, p);
768 if (lg_fail(ret))
769 goto fail;
770
771 ret = lgdt3305_passband_digital_agc(state, p);
772 if (lg_fail(ret))
773 goto fail;
774 ret = lgdt3305_set_agc_power_ref(state, p);
775 if (lg_fail(ret))
776 goto fail;
777 ret = lgdt3305_agc_setup(state, p);
778 if (lg_fail(ret))
779 goto fail;
780
781 /* low if */
782 ret = lgdt3305_write_reg(state, LGDT3305_GEN_CONTROL, 0x2f);
783 if (lg_fail(ret))
784 goto fail;
785 ret = lgdt3305_set_reg_bit(state, LGDT3305_CR_CTR_FREQ_1, 6, 1);
786 if (lg_fail(ret))
787 goto fail;
788
789 ret = lgdt3305_set_if(state, p);
790 if (lg_fail(ret))
791 goto fail;
792 ret = lgdt3305_spectral_inversion(state, p,
793 state->cfg->spectral_inversion
794 ? 1 : 0);
795 if (lg_fail(ret))
796 goto fail;
797
798 ret = lgdt3305_set_filter_extension(state, p);
799 if (lg_fail(ret))
800 goto fail;
801
802 state->current_modulation = p->modulation;
803
804 ret = lgdt3305_mpeg_mode(state, state->cfg->mpeg_mode);
805 if (lg_fail(ret))
806 goto fail;
807
808 /* lgdt3305_mpeg_mode_polarity calls lgdt3305_soft_reset */
809 ret = lgdt3305_mpeg_mode_polarity(state,
810 state->cfg->tpclk_edge,
811 state->cfg->tpvalid_polarity);
812 fail:
813 return ret;
814 }
815
816 static int lgdt3305_get_frontend(struct dvb_frontend *fe)
817 {
818 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
819 struct lgdt3305_state *state = fe->demodulator_priv;
820
821 lg_dbg("\n");
822
823 p->modulation = state->current_modulation;
824 p->frequency = state->current_frequency;
825 return 0;
826 }
827
828 /* ------------------------------------------------------------------------ */
829
830 static int lgdt3305_read_cr_lock_status(struct lgdt3305_state *state,
831 int *locked)
832 {
833 u8 val;
834 int ret;
835 char *cr_lock_state = "";
836
837 *locked = 0;
838
839 ret = lgdt3305_read_reg(state, LGDT3305_CR_LOCK_STATUS, &val);
840 if (lg_fail(ret))
841 goto fail;
842
843 switch (state->current_modulation) {
844 case QAM_256:
845 case QAM_64:
846 if (val & (1 << 1))
847 *locked = 1;
848
849 switch (val & 0x07) {
850 case 0:
851 cr_lock_state = "QAM UNLOCK";
852 break;
853 case 4:
854 cr_lock_state = "QAM 1stLock";
855 break;
856 case 6:
857 cr_lock_state = "QAM 2ndLock";
858 break;
859 case 7:
860 cr_lock_state = "QAM FinalLock";
861 break;
862 default:
863 cr_lock_state = "CLOCKQAM-INVALID!";
864 break;
865 }
866 break;
867 case VSB_8:
868 if (val & (1 << 7)) {
869 *locked = 1;
870 cr_lock_state = "CLOCKVSB";
871 }
872 break;
873 default:
874 ret = -EINVAL;
875 }
876 lg_dbg("(%d) %s\n", *locked, cr_lock_state);
877 fail:
878 return ret;
879 }
880
881 static int lgdt3305_read_fec_lock_status(struct lgdt3305_state *state,
882 int *locked)
883 {
884 u8 val;
885 int ret, mpeg_lock, fec_lock, viterbi_lock;
886
887 *locked = 0;
888
889 switch (state->current_modulation) {
890 case QAM_256:
891 case QAM_64:
892 ret = lgdt3305_read_reg(state,
893 LGDT3305_FEC_LOCK_STATUS, &val);
894 if (lg_fail(ret))
895 goto fail;
896
897 mpeg_lock = (val & (1 << 0)) ? 1 : 0;
898 fec_lock = (val & (1 << 2)) ? 1 : 0;
899 viterbi_lock = (val & (1 << 3)) ? 1 : 0;
900
901 *locked = mpeg_lock && fec_lock && viterbi_lock;
902
903 lg_dbg("(%d) %s%s%s\n", *locked,
904 mpeg_lock ? "mpeg lock " : "",
905 fec_lock ? "fec lock " : "",
906 viterbi_lock ? "viterbi lock" : "");
907 break;
908 case VSB_8:
909 default:
910 ret = -EINVAL;
911 }
912 fail:
913 return ret;
914 }
915
916 static int lgdt3305_read_status(struct dvb_frontend *fe, fe_status_t *status)
917 {
918 struct lgdt3305_state *state = fe->demodulator_priv;
919 u8 val;
920 int ret, signal, inlock, nofecerr, snrgood,
921 cr_lock, fec_lock, sync_lock;
922
923 *status = 0;
924
925 ret = lgdt3305_read_reg(state, LGDT3305_GEN_STATUS, &val);
926 if (lg_fail(ret))
927 goto fail;
928
929 signal = (val & (1 << 4)) ? 1 : 0;
930 inlock = (val & (1 << 3)) ? 0 : 1;
931 sync_lock = (val & (1 << 2)) ? 1 : 0;
932 nofecerr = (val & (1 << 1)) ? 1 : 0;
933 snrgood = (val & (1 << 0)) ? 1 : 0;
934
935 lg_dbg("%s%s%s%s%s\n",
936 signal ? "SIGNALEXIST " : "",
937 inlock ? "INLOCK " : "",
938 sync_lock ? "SYNCLOCK " : "",
939 nofecerr ? "NOFECERR " : "",
940 snrgood ? "SNRGOOD " : "");
941
942 ret = lgdt3305_read_cr_lock_status(state, &cr_lock);
943 if (lg_fail(ret))
944 goto fail;
945
946 if (signal)
947 *status |= FE_HAS_SIGNAL;
948 if (cr_lock)
949 *status |= FE_HAS_CARRIER;
950 if (nofecerr)
951 *status |= FE_HAS_VITERBI;
952 if (sync_lock)
953 *status |= FE_HAS_SYNC;
954
955 switch (state->current_modulation) {
956 case QAM_256:
957 case QAM_64:
958 /* signal bit is unreliable on the DT3304 in QAM mode */
959 if (((LGDT3304 == state->cfg->demod_chip)) && (cr_lock))
960 *status |= FE_HAS_SIGNAL;
961
962 ret = lgdt3305_read_fec_lock_status(state, &fec_lock);
963 if (lg_fail(ret))
964 goto fail;
965
966 if (fec_lock)
967 *status |= FE_HAS_LOCK;
968 break;
969 case VSB_8:
970 if (inlock)
971 *status |= FE_HAS_LOCK;
972 break;
973 default:
974 ret = -EINVAL;
975 }
976 fail:
977 return ret;
978 }
979
980 /* ------------------------------------------------------------------------ */
981
982 /* borrowed from lgdt330x.c */
983 static u32 calculate_snr(u32 mse, u32 c)
984 {
985 if (mse == 0) /* no signal */
986 return 0;
987
988 mse = intlog10(mse);
989 if (mse > c) {
990 /* Negative SNR, which is possible, but realisticly the
991 demod will lose lock before the signal gets this bad. The
992 API only allows for unsigned values, so just return 0 */
993 return 0;
994 }
995 return 10*(c - mse);
996 }
997
998 static int lgdt3305_read_snr(struct dvb_frontend *fe, u16 *snr)
999 {
1000 struct lgdt3305_state *state = fe->demodulator_priv;
1001 u32 noise; /* noise value */
1002 u32 c; /* per-modulation SNR calculation constant */
1003
1004 switch (state->current_modulation) {
1005 case VSB_8:
1006 #ifdef USE_PTMSE
1007 /* Use Phase Tracker Mean-Square Error Register */
1008 /* SNR for ranges from -13.11 to +44.08 */
1009 noise = ((read_reg(state, LGDT3305_PT_MSE_1) & 0x07) << 16) |
1010 (read_reg(state, LGDT3305_PT_MSE_2) << 8) |
1011 (read_reg(state, LGDT3305_PT_MSE_3) & 0xff);
1012 c = 73957994; /* log10(25*32^2)*2^24 */
1013 #else
1014 /* Use Equalizer Mean-Square Error Register */
1015 /* SNR for ranges from -16.12 to +44.08 */
1016 noise = ((read_reg(state, LGDT3305_EQ_MSE_1) & 0x0f) << 16) |
1017 (read_reg(state, LGDT3305_EQ_MSE_2) << 8) |
1018 (read_reg(state, LGDT3305_EQ_MSE_3) & 0xff);
1019 c = 73957994; /* log10(25*32^2)*2^24 */
1020 #endif
1021 break;
1022 case QAM_64:
1023 case QAM_256:
1024 noise = (read_reg(state, LGDT3305_CR_MSE_1) << 8) |
1025 (read_reg(state, LGDT3305_CR_MSE_2) & 0xff);
1026
1027 c = (state->current_modulation == QAM_64) ?
1028 97939837 : 98026066;
1029 /* log10(688128)*2^24 and log10(696320)*2^24 */
1030 break;
1031 default:
1032 return -EINVAL;
1033 }
1034 state->snr = calculate_snr(noise, c);
1035 /* report SNR in dB * 10 */
1036 *snr = (state->snr / ((1 << 24) / 10));
1037 lg_dbg("noise = 0x%08x, snr = %d.%02d dB\n", noise,
1038 state->snr >> 24, (((state->snr >> 8) & 0xffff) * 100) >> 16);
1039
1040 return 0;
1041 }
1042
1043 static int lgdt3305_read_signal_strength(struct dvb_frontend *fe,
1044 u16 *strength)
1045 {
1046 /* borrowed from lgdt330x.c
1047 *
1048 * Calculate strength from SNR up to 35dB
1049 * Even though the SNR can go higher than 35dB,
1050 * there is some comfort factor in having a range of
1051 * strong signals that can show at 100%
1052 */
1053 struct lgdt3305_state *state = fe->demodulator_priv;
1054 u16 snr;
1055 int ret;
1056
1057 *strength = 0;
1058
1059 ret = fe->ops.read_snr(fe, &snr);
1060 if (lg_fail(ret))
1061 goto fail;
1062 /* Rather than use the 8.8 value snr, use state->snr which is 8.24 */
1063 /* scale the range 0 - 35*2^24 into 0 - 65535 */
1064 if (state->snr >= 8960 * 0x10000)
1065 *strength = 0xffff;
1066 else
1067 *strength = state->snr / 8960;
1068 fail:
1069 return ret;
1070 }
1071
1072 /* ------------------------------------------------------------------------ */
1073
1074 static int lgdt3305_read_ber(struct dvb_frontend *fe, u32 *ber)
1075 {
1076 *ber = 0;
1077 return 0;
1078 }
1079
1080 static int lgdt3305_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
1081 {
1082 struct lgdt3305_state *state = fe->demodulator_priv;
1083
1084 *ucblocks =
1085 (read_reg(state, LGDT3305_FEC_PKT_ERR_1) << 8) |
1086 (read_reg(state, LGDT3305_FEC_PKT_ERR_2) & 0xff);
1087
1088 return 0;
1089 }
1090
1091 static int lgdt3305_get_tune_settings(struct dvb_frontend *fe,
1092 struct dvb_frontend_tune_settings
1093 *fe_tune_settings)
1094 {
1095 fe_tune_settings->min_delay_ms = 500;
1096 lg_dbg("\n");
1097 return 0;
1098 }
1099
1100 static void lgdt3305_release(struct dvb_frontend *fe)
1101 {
1102 struct lgdt3305_state *state = fe->demodulator_priv;
1103 lg_dbg("\n");
1104 kfree(state);
1105 }
1106
1107 static struct dvb_frontend_ops lgdt3304_ops;
1108 static struct dvb_frontend_ops lgdt3305_ops;
1109
1110 struct dvb_frontend *lgdt3305_attach(const struct lgdt3305_config *config,
1111 struct i2c_adapter *i2c_adap)
1112 {
1113 struct lgdt3305_state *state = NULL;
1114 int ret;
1115 u8 val;
1116
1117 lg_dbg("(%d-%04x)\n",
1118 i2c_adap ? i2c_adapter_id(i2c_adap) : 0,
1119 config ? config->i2c_addr : 0);
1120
1121 state = kzalloc(sizeof(struct lgdt3305_state), GFP_KERNEL);
1122 if (state == NULL)
1123 goto fail;
1124
1125 state->cfg = config;
1126 state->i2c_adap = i2c_adap;
1127
1128 switch (config->demod_chip) {
1129 case LGDT3304:
1130 memcpy(&state->frontend.ops, &lgdt3304_ops,
1131 sizeof(struct dvb_frontend_ops));
1132 break;
1133 case LGDT3305:
1134 memcpy(&state->frontend.ops, &lgdt3305_ops,
1135 sizeof(struct dvb_frontend_ops));
1136 break;
1137 default:
1138 goto fail;
1139 }
1140 state->frontend.demodulator_priv = state;
1141
1142 /* verify that we're talking to a lg dt3304/5 */
1143 ret = lgdt3305_read_reg(state, LGDT3305_GEN_CTRL_2, &val);
1144 if ((lg_fail(ret)) | (val == 0))
1145 goto fail;
1146 ret = lgdt3305_write_reg(state, 0x0808, 0x80);
1147 if (lg_fail(ret))
1148 goto fail;
1149 ret = lgdt3305_read_reg(state, 0x0808, &val);
1150 if ((lg_fail(ret)) | (val != 0x80))
1151 goto fail;
1152 ret = lgdt3305_write_reg(state, 0x0808, 0x00);
1153 if (lg_fail(ret))
1154 goto fail;
1155
1156 state->current_frequency = -1;
1157 state->current_modulation = -1;
1158
1159 return &state->frontend;
1160 fail:
1161 lg_warn("unable to detect %s hardware\n",
1162 config->demod_chip ? "LGDT3304" : "LGDT3305");
1163 kfree(state);
1164 return NULL;
1165 }
1166 EXPORT_SYMBOL(lgdt3305_attach);
1167
1168 static struct dvb_frontend_ops lgdt3304_ops = {
1169 .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B },
1170 .info = {
1171 .name = "LG Electronics LGDT3304 VSB/QAM Frontend",
1172 .frequency_min = 54000000,
1173 .frequency_max = 858000000,
1174 .frequency_stepsize = 62500,
1175 .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB
1176 },
1177 .i2c_gate_ctrl = lgdt3305_i2c_gate_ctrl,
1178 .init = lgdt3305_init,
1179 .set_frontend = lgdt3304_set_parameters,
1180 .get_frontend = lgdt3305_get_frontend,
1181 .get_tune_settings = lgdt3305_get_tune_settings,
1182 .read_status = lgdt3305_read_status,
1183 .read_ber = lgdt3305_read_ber,
1184 .read_signal_strength = lgdt3305_read_signal_strength,
1185 .read_snr = lgdt3305_read_snr,
1186 .read_ucblocks = lgdt3305_read_ucblocks,
1187 .release = lgdt3305_release,
1188 };
1189
1190 static struct dvb_frontend_ops lgdt3305_ops = {
1191 .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B },
1192 .info = {
1193 .name = "LG Electronics LGDT3305 VSB/QAM Frontend",
1194 .frequency_min = 54000000,
1195 .frequency_max = 858000000,
1196 .frequency_stepsize = 62500,
1197 .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB
1198 },
1199 .i2c_gate_ctrl = lgdt3305_i2c_gate_ctrl,
1200 .init = lgdt3305_init,
1201 .sleep = lgdt3305_sleep,
1202 .set_frontend = lgdt3305_set_parameters,
1203 .get_frontend = lgdt3305_get_frontend,
1204 .get_tune_settings = lgdt3305_get_tune_settings,
1205 .read_status = lgdt3305_read_status,
1206 .read_ber = lgdt3305_read_ber,
1207 .read_signal_strength = lgdt3305_read_signal_strength,
1208 .read_snr = lgdt3305_read_snr,
1209 .read_ucblocks = lgdt3305_read_ucblocks,
1210 .release = lgdt3305_release,
1211 };
1212
1213 MODULE_DESCRIPTION("LG Electronics LGDT3304/5 ATSC/QAM-B Demodulator Driver");
1214 MODULE_AUTHOR("Michael Krufky <mkrufky@linuxtv.org>");
1215 MODULE_LICENSE("GPL");
1216 MODULE_VERSION("0.2");
1217
1218 /*
1219 * Local variables:
1220 * c-basic-offset: 8
1221 * End:
1222 */