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sh_eth: fix EESIPR values for SH77{34|63}
[linux/fpc-iii.git] / drivers / media / dvb-frontends / lgdt3305.c
blob9f5d9380bf5f1eeb3450982c4fa6c7992a8a476f
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 enum fe_modulation 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 {
241 u8 val;
242 int ret;
243 enum lgdt3305_tp_clock_edge edge = state->cfg->tpclk_edge;
244 enum lgdt3305_tp_clock_mode mode = state->cfg->tpclk_mode;
245 enum lgdt3305_tp_valid_polarity valid = state->cfg->tpvalid_polarity;
246
247 lg_dbg("edge = %d, valid = %d\n", edge, valid);
248
249 ret = lgdt3305_read_reg(state, LGDT3305_TP_CTRL_1, &val);
250 if (lg_fail(ret))
251 goto fail;
252
253 val &= ~0x09;
254
255 if (edge)
256 val |= 0x08;
257 if (mode)
258 val |= 0x40;
259 if (valid)
260 val |= 0x01;
261
262 ret = lgdt3305_write_reg(state, LGDT3305_TP_CTRL_1, val);
263 if (lg_fail(ret))
264 goto fail;
265
266 ret = lgdt3305_soft_reset(state);
267 fail:
268 return ret;
269 }
270
271 static int lgdt3305_set_modulation(struct lgdt3305_state *state,
272 struct dtv_frontend_properties *p)
273 {
274 u8 opermode;
275 int ret;
276
277 lg_dbg("\n");
278
279 ret = lgdt3305_read_reg(state, LGDT3305_GEN_CTRL_1, &opermode);
280 if (lg_fail(ret))
281 goto fail;
282
283 opermode &= ~0x03;
284
285 switch (p->modulation) {
286 case VSB_8:
287 opermode |= 0x03;
288 break;
289 case QAM_64:
290 opermode |= 0x00;
291 break;
292 case QAM_256:
293 opermode |= 0x01;
294 break;
295 default:
296 return -EINVAL;
297 }
298 ret = lgdt3305_write_reg(state, LGDT3305_GEN_CTRL_1, opermode);
299 fail:
300 return ret;
301 }
302
303 static int lgdt3305_set_filter_extension(struct lgdt3305_state *state,
304 struct dtv_frontend_properties *p)
305 {
306 int val;
307
308 switch (p->modulation) {
309 case VSB_8:
310 val = 0;
311 break;
312 case QAM_64:
313 case QAM_256:
314 val = 1;
315 break;
316 default:
317 return -EINVAL;
318 }
319 lg_dbg("val = %d\n", val);
320
321 return lgdt3305_set_reg_bit(state, 0x043f, 2, val);
322 }
323
324 /* ------------------------------------------------------------------------ */
325
326 static int lgdt3305_passband_digital_agc(struct lgdt3305_state *state,
327 struct dtv_frontend_properties *p)
328 {
329 u16 agc_ref;
330
331 switch (p->modulation) {
332 case VSB_8:
333 agc_ref = 0x32c4;
334 break;
335 case QAM_64:
336 agc_ref = 0x2a00;
337 break;
338 case QAM_256:
339 agc_ref = 0x2a80;
340 break;
341 default:
342 return -EINVAL;
343 }
344
345 lg_dbg("agc ref: 0x%04x\n", agc_ref);
346
347 lgdt3305_write_reg(state, LGDT3305_DGTL_AGC_REF_1, agc_ref >> 8);
348 lgdt3305_write_reg(state, LGDT3305_DGTL_AGC_REF_2, agc_ref & 0xff);
349
350 return 0;
351 }
352
353 static int lgdt3305_rfagc_loop(struct lgdt3305_state *state,
354 struct dtv_frontend_properties *p)
355 {
356 u16 ifbw, rfbw, agcdelay;
357
358 switch (p->modulation) {
359 case VSB_8:
360 agcdelay = 0x04c0;
361 rfbw = 0x8000;
362 ifbw = 0x8000;
363 break;
364 case QAM_64:
365 case QAM_256:
366 agcdelay = 0x046b;
367 rfbw = 0x8889;
368 /* FIXME: investigate optimal ifbw & rfbw values for the
369 * DT3304 and re-write this switch..case block */
370 if (state->cfg->demod_chip == LGDT3304)
371 ifbw = 0x6666;
372 else /* (state->cfg->demod_chip == LGDT3305) */
373 ifbw = 0x8888;
374 break;
375 default:
376 return -EINVAL;
377 }
378
379 if (state->cfg->rf_agc_loop) {
380 lg_dbg("agcdelay: 0x%04x, rfbw: 0x%04x\n", agcdelay, rfbw);
381
382 /* rf agc loop filter bandwidth */
383 lgdt3305_write_reg(state, LGDT3305_AGC_DELAY_PT_1,
384 agcdelay >> 8);
385 lgdt3305_write_reg(state, LGDT3305_AGC_DELAY_PT_2,
386 agcdelay & 0xff);
387
388 lgdt3305_write_reg(state, LGDT3305_RFAGC_LOOP_FLTR_BW_1,
389 rfbw >> 8);
390 lgdt3305_write_reg(state, LGDT3305_RFAGC_LOOP_FLTR_BW_2,
391 rfbw & 0xff);
392 } else {
393 lg_dbg("ifbw: 0x%04x\n", ifbw);
394
395 /* if agc loop filter bandwidth */
396 lgdt3305_write_reg(state, LGDT3305_IFBW_1, ifbw >> 8);
397 lgdt3305_write_reg(state, LGDT3305_IFBW_2, ifbw & 0xff);
398 }
399
400 return 0;
401 }
402
403 static int lgdt3305_agc_setup(struct lgdt3305_state *state,
404 struct dtv_frontend_properties *p)
405 {
406 int lockdten, acqen;
407
408 switch (p->modulation) {
409 case VSB_8:
410 lockdten = 0;
411 acqen = 0;
412 break;
413 case QAM_64:
414 case QAM_256:
415 lockdten = 1;
416 acqen = 1;
417 break;
418 default:
419 return -EINVAL;
420 }
421
422 lg_dbg("lockdten = %d, acqen = %d\n", lockdten, acqen);
423
424 /* control agc function */
425 switch (state->cfg->demod_chip) {
426 case LGDT3304:
427 lgdt3305_write_reg(state, 0x0314, 0xe1 | lockdten << 1);
428 lgdt3305_set_reg_bit(state, 0x030e, 2, acqen);
429 break;
430 case LGDT3305:
431 lgdt3305_write_reg(state, LGDT3305_AGC_CTRL_4, 0xe1 | lockdten << 1);
432 lgdt3305_set_reg_bit(state, LGDT3305_AGC_CTRL_1, 2, acqen);
433 break;
434 default:
435 return -EINVAL;
436 }
437
438 return lgdt3305_rfagc_loop(state, p);
439 }
440
441 static int lgdt3305_set_agc_power_ref(struct lgdt3305_state *state,
442 struct dtv_frontend_properties *p)
443 {
444 u16 usref = 0;
445
446 switch (p->modulation) {
447 case VSB_8:
448 if (state->cfg->usref_8vsb)
449 usref = state->cfg->usref_8vsb;
450 break;
451 case QAM_64:
452 if (state->cfg->usref_qam64)
453 usref = state->cfg->usref_qam64;
454 break;
455 case QAM_256:
456 if (state->cfg->usref_qam256)
457 usref = state->cfg->usref_qam256;
458 break;
459 default:
460 return -EINVAL;
461 }
462
463 if (usref) {
464 lg_dbg("set manual mode: 0x%04x\n", usref);
465
466 lgdt3305_set_reg_bit(state, LGDT3305_AGC_CTRL_1, 3, 1);
467
468 lgdt3305_write_reg(state, LGDT3305_AGC_POWER_REF_1,
469 0xff & (usref >> 8));
470 lgdt3305_write_reg(state, LGDT3305_AGC_POWER_REF_2,
471 0xff & (usref >> 0));
472 }
473 return 0;
474 }
475
476 /* ------------------------------------------------------------------------ */
477
478 static int lgdt3305_spectral_inversion(struct lgdt3305_state *state,
479 struct dtv_frontend_properties *p,
480 int inversion)
481 {
482 int ret;
483
484 lg_dbg("(%d)\n", inversion);
485
486 switch (p->modulation) {
487 case VSB_8:
488 ret = lgdt3305_write_reg(state, LGDT3305_CR_CTRL_7,
489 inversion ? 0xf9 : 0x79);
490 break;
491 case QAM_64:
492 case QAM_256:
493 ret = lgdt3305_write_reg(state, LGDT3305_FEC_BLOCK_CTRL,
494 inversion ? 0xfd : 0xff);
495 break;
496 default:
497 ret = -EINVAL;
498 }
499 return ret;
500 }
501
502 static int lgdt3305_set_if(struct lgdt3305_state *state,
503 struct dtv_frontend_properties *p)
504 {
505 u16 if_freq_khz;
506 u8 nco1, nco2, nco3, nco4;
507 u64 nco;
508
509 switch (p->modulation) {
510 case VSB_8:
511 if_freq_khz = state->cfg->vsb_if_khz;
512 break;
513 case QAM_64:
514 case QAM_256:
515 if_freq_khz = state->cfg->qam_if_khz;
516 break;
517 default:
518 return -EINVAL;
519 }
520
521 nco = if_freq_khz / 10;
522
523 switch (p->modulation) {
524 case VSB_8:
525 nco <<= 24;
526 do_div(nco, 625);
527 break;
528 case QAM_64:
529 case QAM_256:
530 nco <<= 28;
531 do_div(nco, 625);
532 break;
533 default:
534 return -EINVAL;
535 }
536
537 nco1 = (nco >> 24) & 0x3f;
538 nco1 |= 0x40;
539 nco2 = (nco >> 16) & 0xff;
540 nco3 = (nco >> 8) & 0xff;
541 nco4 = nco & 0xff;
542
543 lgdt3305_write_reg(state, LGDT3305_CR_CTR_FREQ_1, nco1);
544 lgdt3305_write_reg(state, LGDT3305_CR_CTR_FREQ_2, nco2);
545 lgdt3305_write_reg(state, LGDT3305_CR_CTR_FREQ_3, nco3);
546 lgdt3305_write_reg(state, LGDT3305_CR_CTR_FREQ_4, nco4);
547
548 lg_dbg("%d KHz -> [%02x%02x%02x%02x]\n",
549 if_freq_khz, nco1, nco2, nco3, nco4);
550
551 return 0;
552 }
553
554 /* ------------------------------------------------------------------------ */
555
556 static int lgdt3305_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
557 {
558 struct lgdt3305_state *state = fe->demodulator_priv;
559
560 if (state->cfg->deny_i2c_rptr)
561 return 0;
562
563 lg_dbg("(%d)\n", enable);
564
565 return lgdt3305_set_reg_bit(state, LGDT3305_GEN_CTRL_2, 5,
566 enable ? 0 : 1);
567 }
568
569 static int lgdt3305_sleep(struct dvb_frontend *fe)
570 {
571 struct lgdt3305_state *state = fe->demodulator_priv;
572 u8 gen_ctrl_3, gen_ctrl_4;
573
574 lg_dbg("\n");
575
576 gen_ctrl_3 = read_reg(state, LGDT3305_GEN_CTRL_3);
577 gen_ctrl_4 = read_reg(state, LGDT3305_GEN_CTRL_4);
578
579 /* hold in software reset while sleeping */
580 gen_ctrl_3 &= ~0x01;
581 /* tristate the IF-AGC pin */
582 gen_ctrl_3 |= 0x02;
583 /* tristate the RF-AGC pin */
584 gen_ctrl_3 |= 0x04;
585
586 /* disable vsb/qam module */
587 gen_ctrl_4 &= ~0x01;
588 /* disable adc module */
589 gen_ctrl_4 &= ~0x02;
590
591 lgdt3305_write_reg(state, LGDT3305_GEN_CTRL_3, gen_ctrl_3);
592 lgdt3305_write_reg(state, LGDT3305_GEN_CTRL_4, gen_ctrl_4);
593
594 return 0;
595 }
596
597 static int lgdt3305_init(struct dvb_frontend *fe)
598 {
599 struct lgdt3305_state *state = fe->demodulator_priv;
600 int ret;
601
602 static struct lgdt3305_reg lgdt3304_init_data[] = {
603 { .reg = LGDT3305_GEN_CTRL_1, .val = 0x03, },
604 { .reg = 0x000d, .val = 0x02, },
605 { .reg = 0x000e, .val = 0x02, },
606 { .reg = LGDT3305_DGTL_AGC_REF_1, .val = 0x32, },
607 { .reg = LGDT3305_DGTL_AGC_REF_2, .val = 0xc4, },
608 { .reg = LGDT3305_CR_CTR_FREQ_1, .val = 0x00, },
609 { .reg = LGDT3305_CR_CTR_FREQ_2, .val = 0x00, },
610 { .reg = LGDT3305_CR_CTR_FREQ_3, .val = 0x00, },
611 { .reg = LGDT3305_CR_CTR_FREQ_4, .val = 0x00, },
612 { .reg = LGDT3305_CR_CTRL_7, .val = 0xf9, },
613 { .reg = 0x0112, .val = 0x17, },
614 { .reg = 0x0113, .val = 0x15, },
615 { .reg = 0x0114, .val = 0x18, },
616 { .reg = 0x0115, .val = 0xff, },
617 { .reg = 0x0116, .val = 0x3c, },
618 { .reg = 0x0214, .val = 0x67, },
619 { .reg = 0x0424, .val = 0x8d, },
620 { .reg = 0x0427, .val = 0x12, },
621 { .reg = 0x0428, .val = 0x4f, },
622 { .reg = LGDT3305_IFBW_1, .val = 0x80, },
623 { .reg = LGDT3305_IFBW_2, .val = 0x00, },
624 { .reg = 0x030a, .val = 0x08, },
625 { .reg = 0x030b, .val = 0x9b, },
626 { .reg = 0x030d, .val = 0x00, },
627 { .reg = 0x030e, .val = 0x1c, },
628 { .reg = 0x0314, .val = 0xe1, },
629 { .reg = 0x000d, .val = 0x82, },
630 { .reg = LGDT3305_TP_CTRL_1, .val = 0x5b, },
631 { .reg = LGDT3305_TP_CTRL_1, .val = 0x5b, },
632 };
633
634 static struct lgdt3305_reg lgdt3305_init_data[] = {
635 { .reg = LGDT3305_GEN_CTRL_1, .val = 0x03, },
636 { .reg = LGDT3305_GEN_CTRL_2, .val = 0xb0, },
637 { .reg = LGDT3305_GEN_CTRL_3, .val = 0x01, },
638 { .reg = LGDT3305_GEN_CONTROL, .val = 0x6f, },
639 { .reg = LGDT3305_GEN_CTRL_4, .val = 0x03, },
640 { .reg = LGDT3305_DGTL_AGC_REF_1, .val = 0x32, },
641 { .reg = LGDT3305_DGTL_AGC_REF_2, .val = 0xc4, },
642 { .reg = LGDT3305_CR_CTR_FREQ_1, .val = 0x00, },
643 { .reg = LGDT3305_CR_CTR_FREQ_2, .val = 0x00, },
644 { .reg = LGDT3305_CR_CTR_FREQ_3, .val = 0x00, },
645 { .reg = LGDT3305_CR_CTR_FREQ_4, .val = 0x00, },
646 { .reg = LGDT3305_CR_CTRL_7, .val = 0x79, },
647 { .reg = LGDT3305_AGC_POWER_REF_1, .val = 0x32, },
648 { .reg = LGDT3305_AGC_POWER_REF_2, .val = 0xc4, },
649 { .reg = LGDT3305_AGC_DELAY_PT_1, .val = 0x0d, },
650 { .reg = LGDT3305_AGC_DELAY_PT_2, .val = 0x30, },
651 { .reg = LGDT3305_RFAGC_LOOP_FLTR_BW_1, .val = 0x80, },
652 { .reg = LGDT3305_RFAGC_LOOP_FLTR_BW_2, .val = 0x00, },
653 { .reg = LGDT3305_IFBW_1, .val = 0x80, },
654 { .reg = LGDT3305_IFBW_2, .val = 0x00, },
655 { .reg = LGDT3305_AGC_CTRL_1, .val = 0x30, },
656 { .reg = LGDT3305_AGC_CTRL_4, .val = 0x61, },
657 { .reg = LGDT3305_FEC_BLOCK_CTRL, .val = 0xff, },
658 { .reg = LGDT3305_TP_CTRL_1, .val = 0x1b, },
659 };
660
661 lg_dbg("\n");
662
663 switch (state->cfg->demod_chip) {
664 case LGDT3304:
665 ret = lgdt3305_write_regs(state, lgdt3304_init_data,
666 ARRAY_SIZE(lgdt3304_init_data));
667 break;
668 case LGDT3305:
669 ret = lgdt3305_write_regs(state, lgdt3305_init_data,
670 ARRAY_SIZE(lgdt3305_init_data));
671 break;
672 default:
673 ret = -EINVAL;
674 }
675 if (lg_fail(ret))
676 goto fail;
677
678 ret = lgdt3305_soft_reset(state);
679 fail:
680 return ret;
681 }
682
683 static int lgdt3304_set_parameters(struct dvb_frontend *fe)
684 {
685 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
686 struct lgdt3305_state *state = fe->demodulator_priv;
687 int ret;
688
689 lg_dbg("(%d, %d)\n", p->frequency, p->modulation);
690
691 if (fe->ops.tuner_ops.set_params) {
692 ret = fe->ops.tuner_ops.set_params(fe);
693 if (fe->ops.i2c_gate_ctrl)
694 fe->ops.i2c_gate_ctrl(fe, 0);
695 if (lg_fail(ret))
696 goto fail;
697 state->current_frequency = p->frequency;
698 }
699
700 ret = lgdt3305_set_modulation(state, p);
701 if (lg_fail(ret))
702 goto fail;
703
704 ret = lgdt3305_passband_digital_agc(state, p);
705 if (lg_fail(ret))
706 goto fail;
707
708 ret = lgdt3305_agc_setup(state, p);
709 if (lg_fail(ret))
710 goto fail;
711
712 /* reg 0x030d is 3304-only... seen in vsb and qam usbsnoops... */
713 switch (p->modulation) {
714 case VSB_8:
715 lgdt3305_write_reg(state, 0x030d, 0x00);
716 lgdt3305_write_reg(state, LGDT3305_CR_CTR_FREQ_1, 0x4f);
717 lgdt3305_write_reg(state, LGDT3305_CR_CTR_FREQ_2, 0x0c);
718 lgdt3305_write_reg(state, LGDT3305_CR_CTR_FREQ_3, 0xac);
719 lgdt3305_write_reg(state, LGDT3305_CR_CTR_FREQ_4, 0xba);
720 break;
721 case QAM_64:
722 case QAM_256:
723 lgdt3305_write_reg(state, 0x030d, 0x14);
724 ret = lgdt3305_set_if(state, p);
725 if (lg_fail(ret))
726 goto fail;
727 break;
728 default:
729 return -EINVAL;
730 }
731
732
733 ret = lgdt3305_spectral_inversion(state, p,
734 state->cfg->spectral_inversion
735 ? 1 : 0);
736 if (lg_fail(ret))
737 goto fail;
738
739 state->current_modulation = p->modulation;
740
741 ret = lgdt3305_mpeg_mode(state, state->cfg->mpeg_mode);
742 if (lg_fail(ret))
743 goto fail;
744
745 /* lgdt3305_mpeg_mode_polarity calls lgdt3305_soft_reset */
746 ret = lgdt3305_mpeg_mode_polarity(state);
747 fail:
748 return ret;
749 }
750
751 static int lgdt3305_set_parameters(struct dvb_frontend *fe)
752 {
753 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
754 struct lgdt3305_state *state = fe->demodulator_priv;
755 int ret;
756
757 lg_dbg("(%d, %d)\n", p->frequency, p->modulation);
758
759 if (fe->ops.tuner_ops.set_params) {
760 ret = fe->ops.tuner_ops.set_params(fe);
761 if (fe->ops.i2c_gate_ctrl)
762 fe->ops.i2c_gate_ctrl(fe, 0);
763 if (lg_fail(ret))
764 goto fail;
765 state->current_frequency = p->frequency;
766 }
767
768 ret = lgdt3305_set_modulation(state, p);
769 if (lg_fail(ret))
770 goto fail;
771
772 ret = lgdt3305_passband_digital_agc(state, p);
773 if (lg_fail(ret))
774 goto fail;
775 ret = lgdt3305_set_agc_power_ref(state, p);
776 if (lg_fail(ret))
777 goto fail;
778 ret = lgdt3305_agc_setup(state, p);
779 if (lg_fail(ret))
780 goto fail;
781
782 /* low if */
783 ret = lgdt3305_write_reg(state, LGDT3305_GEN_CONTROL, 0x2f);
784 if (lg_fail(ret))
785 goto fail;
786 ret = lgdt3305_set_reg_bit(state, LGDT3305_CR_CTR_FREQ_1, 6, 1);
787 if (lg_fail(ret))
788 goto fail;
789
790 ret = lgdt3305_set_if(state, p);
791 if (lg_fail(ret))
792 goto fail;
793 ret = lgdt3305_spectral_inversion(state, p,
794 state->cfg->spectral_inversion
795 ? 1 : 0);
796 if (lg_fail(ret))
797 goto fail;
798
799 ret = lgdt3305_set_filter_extension(state, p);
800 if (lg_fail(ret))
801 goto fail;
802
803 state->current_modulation = p->modulation;
804
805 ret = lgdt3305_mpeg_mode(state, state->cfg->mpeg_mode);
806 if (lg_fail(ret))
807 goto fail;
808
809 /* lgdt3305_mpeg_mode_polarity calls lgdt3305_soft_reset */
810 ret = lgdt3305_mpeg_mode_polarity(state);
811 fail:
812 return ret;
813 }
814
815 static int lgdt3305_get_frontend(struct dvb_frontend *fe,
816 struct dtv_frontend_properties *p)
817 {
818 struct lgdt3305_state *state = fe->demodulator_priv;
819
820 lg_dbg("\n");
821
822 p->modulation = state->current_modulation;
823 p->frequency = state->current_frequency;
824 return 0;
825 }
826
827 /* ------------------------------------------------------------------------ */
828
829 static int lgdt3305_read_cr_lock_status(struct lgdt3305_state *state,
830 int *locked)
831 {
832 u8 val;
833 int ret;
834 char *cr_lock_state = "";
835
836 *locked = 0;
837
838 ret = lgdt3305_read_reg(state, LGDT3305_CR_LOCK_STATUS, &val);
839 if (lg_fail(ret))
840 goto fail;
841
842 switch (state->current_modulation) {
843 case QAM_256:
844 case QAM_64:
845 if (val & (1 << 1))
846 *locked = 1;
847
848 switch (val & 0x07) {
849 case 0:
850 cr_lock_state = "QAM UNLOCK";
851 break;
852 case 4:
853 cr_lock_state = "QAM 1stLock";
854 break;
855 case 6:
856 cr_lock_state = "QAM 2ndLock";
857 break;
858 case 7:
859 cr_lock_state = "QAM FinalLock";
860 break;
861 default:
862 cr_lock_state = "CLOCKQAM-INVALID!";
863 break;
864 }
865 break;
866 case VSB_8:
867 if (val & (1 << 7)) {
868 *locked = 1;
869 cr_lock_state = "CLOCKVSB";
870 }
871 break;
872 default:
873 ret = -EINVAL;
874 }
875 lg_dbg("(%d) %s\n", *locked, cr_lock_state);
876 fail:
877 return ret;
878 }
879
880 static int lgdt3305_read_fec_lock_status(struct lgdt3305_state *state,
881 int *locked)
882 {
883 u8 val;
884 int ret, mpeg_lock, fec_lock, viterbi_lock;
885
886 *locked = 0;
887
888 switch (state->current_modulation) {
889 case QAM_256:
890 case QAM_64:
891 ret = lgdt3305_read_reg(state,
892 LGDT3305_FEC_LOCK_STATUS, &val);
893 if (lg_fail(ret))
894 goto fail;
895
896 mpeg_lock = (val & (1 << 0)) ? 1 : 0;
897 fec_lock = (val & (1 << 2)) ? 1 : 0;
898 viterbi_lock = (val & (1 << 3)) ? 1 : 0;
899
900 *locked = mpeg_lock && fec_lock && viterbi_lock;
901
902 lg_dbg("(%d) %s%s%s\n", *locked,
903 mpeg_lock ? "mpeg lock " : "",
904 fec_lock ? "fec lock " : "",
905 viterbi_lock ? "viterbi lock" : "");
906 break;
907 case VSB_8:
908 default:
909 ret = -EINVAL;
910 }
911 fail:
912 return ret;
913 }
914
915 static int lgdt3305_read_status(struct dvb_frontend *fe, enum fe_status *status)
916 {
917 struct lgdt3305_state *state = fe->demodulator_priv;
918 u8 val;
919 int ret, signal, inlock, nofecerr, snrgood,
920 cr_lock, fec_lock, sync_lock;
921
922 *status = 0;
923
924 ret = lgdt3305_read_reg(state, LGDT3305_GEN_STATUS, &val);
925 if (lg_fail(ret))
926 goto fail;
927
928 signal = (val & (1 << 4)) ? 1 : 0;
929 inlock = (val & (1 << 3)) ? 0 : 1;
930 sync_lock = (val & (1 << 2)) ? 1 : 0;
931 nofecerr = (val & (1 << 1)) ? 1 : 0;
932 snrgood = (val & (1 << 0)) ? 1 : 0;
933
934 lg_dbg("%s%s%s%s%s\n",
935 signal ? "SIGNALEXIST " : "",
936 inlock ? "INLOCK " : "",
937 sync_lock ? "SYNCLOCK " : "",
938 nofecerr ? "NOFECERR " : "",
939 snrgood ? "SNRGOOD " : "");
940
941 ret = lgdt3305_read_cr_lock_status(state, &cr_lock);
942 if (lg_fail(ret))
943 goto fail;
944
945 if (signal)
946 *status |= FE_HAS_SIGNAL;
947 if (cr_lock)
948 *status |= FE_HAS_CARRIER;
949 if (nofecerr)
950 *status |= FE_HAS_VITERBI;
951 if (sync_lock)
952 *status |= FE_HAS_SYNC;
953
954 switch (state->current_modulation) {
955 case QAM_256:
956 case QAM_64:
957 /* signal bit is unreliable on the DT3304 in QAM mode */
958 if (((LGDT3304 == state->cfg->demod_chip)) && (cr_lock))
959 *status |= FE_HAS_SIGNAL;
960
961 ret = lgdt3305_read_fec_lock_status(state, &fec_lock);
962 if (lg_fail(ret))
963 goto fail;
964
965 if (fec_lock)
966 *status |= FE_HAS_LOCK;
967 break;
968 case VSB_8:
969 if (inlock)
970 *status |= FE_HAS_LOCK;
971 break;
972 default:
973 ret = -EINVAL;
974 }
975 fail:
976 return ret;
977 }
978
979 /* ------------------------------------------------------------------------ */
980
981 /* borrowed from lgdt330x.c */
982 static u32 calculate_snr(u32 mse, u32 c)
983 {
984 if (mse == 0) /* no signal */
985 return 0;
986
987 mse = intlog10(mse);
988 if (mse > c) {
989 /* Negative SNR, which is possible, but realisticly the
990 demod will lose lock before the signal gets this bad. The
991 API only allows for unsigned values, so just return 0 */
992 return 0;
993 }
994 return 10*(c - mse);
995 }
996
997 static int lgdt3305_read_snr(struct dvb_frontend *fe, u16 *snr)
998 {
999 struct lgdt3305_state *state = fe->demodulator_priv;
1000 u32 noise; /* noise value */
1001 u32 c; /* per-modulation SNR calculation constant */
1002
1003 switch (state->current_modulation) {
1004 case VSB_8:
1005 #ifdef USE_PTMSE
1006 /* Use Phase Tracker Mean-Square Error Register */
1007 /* SNR for ranges from -13.11 to +44.08 */
1008 noise = ((read_reg(state, LGDT3305_PT_MSE_1) & 0x07) << 16) |
1009 (read_reg(state, LGDT3305_PT_MSE_2) << 8) |
1010 (read_reg(state, LGDT3305_PT_MSE_3) & 0xff);
1011 c = 73957994; /* log10(25*32^2)*2^24 */
1012 #else
1013 /* Use Equalizer Mean-Square Error Register */
1014 /* SNR for ranges from -16.12 to +44.08 */
1015 noise = ((read_reg(state, LGDT3305_EQ_MSE_1) & 0x0f) << 16) |
1016 (read_reg(state, LGDT3305_EQ_MSE_2) << 8) |
1017 (read_reg(state, LGDT3305_EQ_MSE_3) & 0xff);
1018 c = 73957994; /* log10(25*32^2)*2^24 */
1019 #endif
1020 break;
1021 case QAM_64:
1022 case QAM_256:
1023 noise = (read_reg(state, LGDT3305_CR_MSE_1) << 8) |
1024 (read_reg(state, LGDT3305_CR_MSE_2) & 0xff);
1025
1026 c = (state->current_modulation == QAM_64) ?
1027 97939837 : 98026066;
1028 /* log10(688128)*2^24 and log10(696320)*2^24 */
1029 break;
1030 default:
1031 return -EINVAL;
1032 }
1033 state->snr = calculate_snr(noise, c);
1034 /* report SNR in dB * 10 */
1035 *snr = (state->snr / ((1 << 24) / 10));
1036 lg_dbg("noise = 0x%08x, snr = %d.%02d dB\n", noise,
1037 state->snr >> 24, (((state->snr >> 8) & 0xffff) * 100) >> 16);
1038
1039 return 0;
1040 }
1041
1042 static int lgdt3305_read_signal_strength(struct dvb_frontend *fe,
1043 u16 *strength)
1044 {
1045 /* borrowed from lgdt330x.c
1046 *
1047 * Calculate strength from SNR up to 35dB
1048 * Even though the SNR can go higher than 35dB,
1049 * there is some comfort factor in having a range of
1050 * strong signals that can show at 100%
1051 */
1052 struct lgdt3305_state *state = fe->demodulator_priv;
1053 u16 snr;
1054 int ret;
1055
1056 *strength = 0;
1057
1058 ret = fe->ops.read_snr(fe, &snr);
1059 if (lg_fail(ret))
1060 goto fail;
1061 /* Rather than use the 8.8 value snr, use state->snr which is 8.24 */
1062 /* scale the range 0 - 35*2^24 into 0 - 65535 */
1063 if (state->snr >= 8960 * 0x10000)
1064 *strength = 0xffff;
1065 else
1066 *strength = state->snr / 8960;
1067 fail:
1068 return ret;
1069 }
1070
1071 /* ------------------------------------------------------------------------ */
1072
1073 static int lgdt3305_read_ber(struct dvb_frontend *fe, u32 *ber)
1074 {
1075 *ber = 0;
1076 return 0;
1077 }
1078
1079 static int lgdt3305_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
1080 {
1081 struct lgdt3305_state *state = fe->demodulator_priv;
1082
1083 *ucblocks =
1084 (read_reg(state, LGDT3305_FEC_PKT_ERR_1) << 8) |
1085 (read_reg(state, LGDT3305_FEC_PKT_ERR_2) & 0xff);
1086
1087 return 0;
1088 }
1089
1090 static int lgdt3305_get_tune_settings(struct dvb_frontend *fe,
1091 struct dvb_frontend_tune_settings
1092 *fe_tune_settings)
1093 {
1094 fe_tune_settings->min_delay_ms = 500;
1095 lg_dbg("\n");
1096 return 0;
1097 }
1098
1099 static void lgdt3305_release(struct dvb_frontend *fe)
1100 {
1101 struct lgdt3305_state *state = fe->demodulator_priv;
1102 lg_dbg("\n");
1103 kfree(state);
1104 }
1105
1106 static const struct dvb_frontend_ops lgdt3304_ops;
1107 static const struct dvb_frontend_ops lgdt3305_ops;
1108
1109 struct dvb_frontend *lgdt3305_attach(const struct lgdt3305_config *config,
1110 struct i2c_adapter *i2c_adap)
1111 {
1112 struct lgdt3305_state *state = NULL;
1113 int ret;
1114 u8 val;
1115
1116 lg_dbg("(%d-%04x)\n",
1117 i2c_adap ? i2c_adapter_id(i2c_adap) : 0,
1118 config ? config->i2c_addr : 0);
1119
1120 state = kzalloc(sizeof(struct lgdt3305_state), GFP_KERNEL);
1121 if (state == NULL)
1122 goto fail;
1123
1124 state->cfg = config;
1125 state->i2c_adap = i2c_adap;
1126
1127 switch (config->demod_chip) {
1128 case LGDT3304:
1129 memcpy(&state->frontend.ops, &lgdt3304_ops,
1130 sizeof(struct dvb_frontend_ops));
1131 break;
1132 case LGDT3305:
1133 memcpy(&state->frontend.ops, &lgdt3305_ops,
1134 sizeof(struct dvb_frontend_ops));
1135 break;
1136 default:
1137 goto fail;
1138 }
1139 state->frontend.demodulator_priv = state;
1140
1141 /* verify that we're talking to a lg dt3304/5 */
1142 ret = lgdt3305_read_reg(state, LGDT3305_GEN_CTRL_2, &val);
1143 if ((lg_fail(ret)) | (val == 0))
1144 goto fail;
1145 ret = lgdt3305_write_reg(state, 0x0808, 0x80);
1146 if (lg_fail(ret))
1147 goto fail;
1148 ret = lgdt3305_read_reg(state, 0x0808, &val);
1149 if ((lg_fail(ret)) | (val != 0x80))
1150 goto fail;
1151 ret = lgdt3305_write_reg(state, 0x0808, 0x00);
1152 if (lg_fail(ret))
1153 goto fail;
1154
1155 state->current_frequency = -1;
1156 state->current_modulation = -1;
1157
1158 return &state->frontend;
1159 fail:
1160 lg_warn("unable to detect %s hardware\n",
1161 config->demod_chip ? "LGDT3304" : "LGDT3305");
1162 kfree(state);
1163 return NULL;
1164 }
1165 EXPORT_SYMBOL(lgdt3305_attach);
1166
1167 static const struct dvb_frontend_ops lgdt3304_ops = {
1168 .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B },
1169 .info = {
1170 .name = "LG Electronics LGDT3304 VSB/QAM Frontend",
1171 .frequency_min = 54000000,
1172 .frequency_max = 858000000,
1173 .frequency_stepsize = 62500,
1174 .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB
1175 },
1176 .i2c_gate_ctrl = lgdt3305_i2c_gate_ctrl,
1177 .init = lgdt3305_init,
1178 .sleep = lgdt3305_sleep,
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 const 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");
Linux with added FPC-III support