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36#include <linux/kernel.h>
37#include <linux/module.h>
38#include <linux/init.h>
39#include <linux/delay.h>
40#include <linux/string.h>
41#include <linux/slab.h>
42#include <asm/byteorder.h>
43
44#include "dvb_frontend.h"
45#include "dvb_math.h"
46#include "lgdt330x_priv.h"
47#include "lgdt330x.h"
48
49
50
51
52static int debug;
53module_param(debug, int, 0644);
54MODULE_PARM_DESC(debug,"Turn on/off lgdt330x frontend debugging (default:off).");
55#define dprintk(args...) \
56do { \
57if (debug) printk(KERN_DEBUG "lgdt330x: " args); \
58} while (0)
59
60struct lgdt330x_state
61{
62 struct i2c_adapter* i2c;
63
64
65 const struct lgdt330x_config* config;
66
67 struct dvb_frontend frontend;
68
69
70 fe_modulation_t current_modulation;
71 u32 snr;
72
73
74 u32 current_frequency;
75};
76
77static int i2c_write_demod_bytes (struct lgdt330x_state* state,
78 u8 *buf,
79 int len )
80{
81 struct i2c_msg msg =
82 { .addr = state->config->demod_address,
83 .flags = 0,
84 .buf = buf,
85 .len = 2 };
86 int i;
87 int err;
88
89 for (i=0; i<len-1; i+=2){
90 if ((err = i2c_transfer(state->i2c, &msg, 1)) != 1) {
91 printk(KERN_WARNING "lgdt330x: %s error (addr %02x <- %02x, err = %i)\n", __func__, msg.buf[0], msg.buf[1], err);
92 if (err < 0)
93 return err;
94 else
95 return -EREMOTEIO;
96 }
97 msg.buf += 2;
98 }
99 return 0;
100}
101
102
103
104
105
106
107static int i2c_read_demod_bytes(struct lgdt330x_state *state,
108 enum I2C_REG reg, u8 *buf, int len)
109{
110 u8 wr [] = { reg };
111 struct i2c_msg msg [] = {
112 { .addr = state->config->demod_address,
113 .flags = 0, .buf = wr, .len = 1 },
114 { .addr = state->config->demod_address,
115 .flags = I2C_M_RD, .buf = buf, .len = len },
116 };
117 int ret;
118 ret = i2c_transfer(state->i2c, msg, 2);
119 if (ret != 2) {
120 printk(KERN_WARNING "lgdt330x: %s: addr 0x%02x select 0x%02x error (ret == %i)\n", __func__, state->config->demod_address, reg, ret);
121 if (ret >= 0)
122 ret = -EIO;
123 } else {
124 ret = 0;
125 }
126 return ret;
127}
128
129
130static int lgdt3302_SwReset(struct lgdt330x_state* state)
131{
132 u8 ret;
133 u8 reset[] = {
134 IRQ_MASK,
135 0x00
136
137 };
138
139 ret = i2c_write_demod_bytes(state,
140 reset, sizeof(reset));
141 if (ret == 0) {
142
143
144 reset[1] = 0x7f;
145 ret = i2c_write_demod_bytes(state,
146 reset, sizeof(reset));
147 }
148 return ret;
149}
150
151static int lgdt3303_SwReset(struct lgdt330x_state* state)
152{
153 u8 ret;
154 u8 reset[] = {
155 0x02,
156 0x00
157 };
158
159 ret = i2c_write_demod_bytes(state,
160 reset, sizeof(reset));
161 if (ret == 0) {
162
163
164 reset[1] = 0x01;
165 ret = i2c_write_demod_bytes(state,
166 reset, sizeof(reset));
167 }
168 return ret;
169}
170
171static int lgdt330x_SwReset(struct lgdt330x_state* state)
172{
173 switch (state->config->demod_chip) {
174 case LGDT3302:
175 return lgdt3302_SwReset(state);
176 case LGDT3303:
177 return lgdt3303_SwReset(state);
178 default:
179 return -ENODEV;
180 }
181}
182
183static int lgdt330x_init(struct dvb_frontend* fe)
184{
185
186
187
188
189
190
191
192
193
194
195 static u8 lgdt3302_init_data[] = {
196
197
198
199 VSB_CARRIER_FREQ0, 0x00,
200 VSB_CARRIER_FREQ1, 0x87,
201 VSB_CARRIER_FREQ2, 0x8e,
202 VSB_CARRIER_FREQ3, 0x01,
203
204
205 DEMUX_CONTROL, 0xfb,
206
207
208 AGC_RF_BANDWIDTH0, 0x40,
209 AGC_RF_BANDWIDTH1, 0x93,
210 AGC_RF_BANDWIDTH2, 0x00,
211
212
213 AGC_FUNC_CTRL2, 0xc6,
214
215
216 AGC_FUNC_CTRL3, 0x40,
217
218
219 AGC_DELAY0, 0x07,
220 AGC_DELAY2, 0xfe,
221
222
223 AGC_LOOP_BANDWIDTH0, 0x08,
224 AGC_LOOP_BANDWIDTH1, 0x9a
225 };
226
227 static u8 lgdt3303_init_data[] = {
228 0x4c, 0x14
229 };
230
231 static u8 flip_1_lgdt3303_init_data[] = {
232 0x4c, 0x14,
233 0x87, 0xf3
234 };
235
236 static u8 flip_2_lgdt3303_init_data[] = {
237 0x4c, 0x14,
238 0x87, 0xda
239 };
240
241 struct lgdt330x_state* state = fe->demodulator_priv;
242 char *chip_name;
243 int err;
244
245 switch (state->config->demod_chip) {
246 case LGDT3302:
247 chip_name = "LGDT3302";
248 err = i2c_write_demod_bytes(state, lgdt3302_init_data,
249 sizeof(lgdt3302_init_data));
250 break;
251 case LGDT3303:
252 chip_name = "LGDT3303";
253 switch (state->config->clock_polarity_flip) {
254 case 2:
255 err = i2c_write_demod_bytes(state,
256 flip_2_lgdt3303_init_data,
257 sizeof(flip_2_lgdt3303_init_data));
258 break;
259 case 1:
260 err = i2c_write_demod_bytes(state,
261 flip_1_lgdt3303_init_data,
262 sizeof(flip_1_lgdt3303_init_data));
263 break;
264 case 0:
265 default:
266 err = i2c_write_demod_bytes(state, lgdt3303_init_data,
267 sizeof(lgdt3303_init_data));
268 }
269 break;
270 default:
271 chip_name = "undefined";
272 printk (KERN_WARNING "Only LGDT3302 and LGDT3303 are supported chips.\n");
273 err = -ENODEV;
274 }
275 dprintk("%s entered as %s\n", __func__, chip_name);
276 if (err < 0)
277 return err;
278 return lgdt330x_SwReset(state);
279}
280
281static int lgdt330x_read_ber(struct dvb_frontend* fe, u32* ber)
282{
283 *ber = 0;
284 return 0;
285}
286
287static int lgdt330x_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
288{
289 struct lgdt330x_state* state = fe->demodulator_priv;
290 int err;
291 u8 buf[2];
292
293 *ucblocks = 0;
294
295 switch (state->config->demod_chip) {
296 case LGDT3302:
297 err = i2c_read_demod_bytes(state, LGDT3302_PACKET_ERR_COUNTER1,
298 buf, sizeof(buf));
299 break;
300 case LGDT3303:
301 err = i2c_read_demod_bytes(state, LGDT3303_PACKET_ERR_COUNTER1,
302 buf, sizeof(buf));
303 break;
304 default:
305 printk(KERN_WARNING
306 "Only LGDT3302 and LGDT3303 are supported chips.\n");
307 err = -ENODEV;
308 }
309 if (err < 0)
310 return err;
311
312 *ucblocks = (buf[0] << 8) | buf[1];
313 return 0;
314}
315
316static int lgdt330x_set_parameters(struct dvb_frontend *fe)
317{
318 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
319
320
321
322
323 static u8 lgdt3303_8vsb_44_data[] = {
324 0x04, 0x00,
325 0x0d, 0x40,
326 0x0e, 0x87,
327 0x0f, 0x8e,
328 0x10, 0x01,
329 0x47, 0x8b };
330
331
332
333
334
335 static u8 lgdt3303_qam_data[] = {
336 0x04, 0x00,
337 0x0d, 0x00,
338 0x0e, 0x00,
339 0x0f, 0x00,
340 0x10, 0x00,
341 0x51, 0x63,
342 0x47, 0x66,
343 0x48, 0x66,
344 0x4d, 0x1a,
345 0x49, 0x08,
346 0x4a, 0x9b };
347
348 struct lgdt330x_state* state = fe->demodulator_priv;
349
350 static u8 top_ctrl_cfg[] = { TOP_CONTROL, 0x03 };
351
352 int err = 0;
353
354 if (state->current_modulation != p->modulation) {
355 switch (p->modulation) {
356 case VSB_8:
357 dprintk("%s: VSB_8 MODE\n", __func__);
358
359
360 top_ctrl_cfg[1] = 0x03;
361
362
363 if (state->config->pll_rf_set)
364 state->config->pll_rf_set(fe, 1);
365
366 if (state->config->demod_chip == LGDT3303) {
367 err = i2c_write_demod_bytes(state, lgdt3303_8vsb_44_data,
368 sizeof(lgdt3303_8vsb_44_data));
369 }
370 break;
371
372 case QAM_64:
373 dprintk("%s: QAM_64 MODE\n", __func__);
374
375
376 top_ctrl_cfg[1] = 0x00;
377
378
379 if (state->config->pll_rf_set)
380 state->config->pll_rf_set(fe, 0);
381
382 if (state->config->demod_chip == LGDT3303) {
383 err = i2c_write_demod_bytes(state, lgdt3303_qam_data,
384 sizeof(lgdt3303_qam_data));
385 }
386 break;
387
388 case QAM_256:
389 dprintk("%s: QAM_256 MODE\n", __func__);
390
391
392 top_ctrl_cfg[1] = 0x01;
393
394
395 if (state->config->pll_rf_set)
396 state->config->pll_rf_set(fe, 0);
397
398 if (state->config->demod_chip == LGDT3303) {
399 err = i2c_write_demod_bytes(state, lgdt3303_qam_data,
400 sizeof(lgdt3303_qam_data));
401 }
402 break;
403 default:
404 printk(KERN_WARNING "lgdt330x: %s: Modulation type(%d) UNSUPPORTED\n", __func__, p->modulation);
405 return -1;
406 }
407 if (err < 0)
408 printk(KERN_WARNING "lgdt330x: %s: error blasting "
409 "bytes to lgdt3303 for modulation type(%d)\n",
410 __func__, p->modulation);
411
412
413
414
415
416
417 top_ctrl_cfg[1] |= state->config->serial_mpeg;
418
419
420 i2c_write_demod_bytes(state, top_ctrl_cfg,
421 sizeof(top_ctrl_cfg));
422 if (state->config->set_ts_params)
423 state->config->set_ts_params(fe, 0);
424 state->current_modulation = p->modulation;
425 }
426
427
428 if (fe->ops.tuner_ops.set_params) {
429 fe->ops.tuner_ops.set_params(fe);
430 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
431 }
432
433
434
435
436 state->current_frequency = p->frequency;
437
438 lgdt330x_SwReset(state);
439 return 0;
440}
441
442static int lgdt330x_get_frontend(struct dvb_frontend *fe)
443{
444 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
445 struct lgdt330x_state *state = fe->demodulator_priv;
446 p->frequency = state->current_frequency;
447 return 0;
448}
449
450static int lgdt3302_read_status(struct dvb_frontend* fe, fe_status_t* status)
451{
452 struct lgdt330x_state* state = fe->demodulator_priv;
453 u8 buf[3];
454
455 *status = 0;
456
457
458 i2c_read_demod_bytes(state, AGC_STATUS, buf, 1);
459 dprintk("%s: AGC_STATUS = 0x%02x\n", __func__, buf[0]);
460 if ((buf[0] & 0x0c) == 0x8){
461
462
463 *status |= FE_HAS_SIGNAL;
464 }
465
466
467
468
469
470
471
472 i2c_read_demod_bytes(state, TOP_CONTROL, buf, sizeof(buf));
473 dprintk("%s: TOP_CONTROL = 0x%02x, IRO_MASK = 0x%02x, IRQ_STATUS = 0x%02x\n", __func__, buf[0], buf[1], buf[2]);
474
475
476
477 if ((buf[2] & 0x03) == 0x01) {
478 *status |= FE_HAS_SYNC;
479 }
480
481
482 if ((buf[2] & 0x0c) == 0x08) {
483 *status |= FE_HAS_LOCK;
484 *status |= FE_HAS_VITERBI;
485 }
486
487
488 i2c_read_demod_bytes(state, CARRIER_LOCK, buf, 1);
489 dprintk("%s: CARRIER_LOCK = 0x%02x\n", __func__, buf[0]);
490 switch (state->current_modulation) {
491 case QAM_256:
492 case QAM_64:
493
494 if ((buf[0] & 0x07) == 0x07)
495 *status |= FE_HAS_CARRIER;
496 break;
497 case VSB_8:
498 if ((buf[0] & 0x80) == 0x80)
499 *status |= FE_HAS_CARRIER;
500 break;
501 default:
502 printk(KERN_WARNING "lgdt330x: %s: Modulation set to unsupported value\n", __func__);
503 }
504
505 return 0;
506}
507
508static int lgdt3303_read_status(struct dvb_frontend* fe, fe_status_t* status)
509{
510 struct lgdt330x_state* state = fe->demodulator_priv;
511 int err;
512 u8 buf[3];
513
514 *status = 0;
515
516
517 err = i2c_read_demod_bytes(state, 0x58, buf, 1);
518 if (err < 0)
519 return err;
520
521 dprintk("%s: AGC_STATUS = 0x%02x\n", __func__, buf[0]);
522 if ((buf[0] & 0x21) == 0x01){
523
524
525 *status |= FE_HAS_SIGNAL;
526 }
527
528
529 i2c_read_demod_bytes(state, CARRIER_LOCK, buf, 1);
530 dprintk("%s: CARRIER_LOCK = 0x%02x\n", __func__, buf[0]);
531 switch (state->current_modulation) {
532 case QAM_256:
533 case QAM_64:
534
535 if ((buf[0] & 0x07) == 0x07)
536 *status |= FE_HAS_CARRIER;
537 else
538 break;
539 i2c_read_demod_bytes(state, 0x8a, buf, 1);
540 if ((buf[0] & 0x04) == 0x04)
541 *status |= FE_HAS_SYNC;
542 if ((buf[0] & 0x01) == 0x01)
543 *status |= FE_HAS_LOCK;
544 if ((buf[0] & 0x08) == 0x08)
545 *status |= FE_HAS_VITERBI;
546 break;
547 case VSB_8:
548 if ((buf[0] & 0x80) == 0x80)
549 *status |= FE_HAS_CARRIER;
550 else
551 break;
552 i2c_read_demod_bytes(state, 0x38, buf, 1);
553 if ((buf[0] & 0x02) == 0x00)
554 *status |= FE_HAS_SYNC;
555 if ((buf[0] & 0x01) == 0x01) {
556 *status |= FE_HAS_LOCK;
557 *status |= FE_HAS_VITERBI;
558 }
559 break;
560 default:
561 printk(KERN_WARNING "lgdt330x: %s: Modulation set to unsupported value\n", __func__);
562 }
563 return 0;
564}
565
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588
589static u32 calculate_snr(u32 mse, u32 c)
590{
591 if (mse == 0)
592 return 0;
593
594 mse = intlog10(mse);
595 if (mse > c) {
596
597
598
599 return 0;
600 }
601 return 10*(c - mse);
602}
603
604static int lgdt3302_read_snr(struct dvb_frontend* fe, u16* snr)
605{
606 struct lgdt330x_state* state = (struct lgdt330x_state*) fe->demodulator_priv;
607 u8 buf[5];
608 u32 noise;
609 u32 c;
610
611 switch(state->current_modulation) {
612 case VSB_8:
613 i2c_read_demod_bytes(state, LGDT3302_EQPH_ERR0, buf, 5);
614#ifdef USE_EQMSE
615
616
617 noise = ((buf[0] & 7) << 16) | (buf[1] << 8) | buf[2];
618 c = 69765745;
619#else
620
621
622 noise = ((buf[0] & 7<<3) << 13) | (buf[3] << 8) | buf[4];
623 c = 73957994;
624#endif
625 break;
626 case QAM_64:
627 case QAM_256:
628 i2c_read_demod_bytes(state, CARRIER_MSEQAM1, buf, 2);
629 noise = ((buf[0] & 3) << 8) | buf[1];
630 c = state->current_modulation == QAM_64 ? 97939837 : 98026066;
631
632 break;
633 default:
634 printk(KERN_ERR "lgdt330x: %s: Modulation set to unsupported value\n",
635 __func__);
636 return -EREMOTEIO;
637 }
638
639 state->snr = calculate_snr(noise, c);
640 *snr = (state->snr) >> 16;
641
642 dprintk("%s: noise = 0x%08x, snr = %d.%02d dB\n", __func__, noise,
643 state->snr >> 24, (((state->snr>>8) & 0xffff) * 100) >> 16);
644
645 return 0;
646}
647
648static int lgdt3303_read_snr(struct dvb_frontend* fe, u16* snr)
649{
650 struct lgdt330x_state* state = (struct lgdt330x_state*) fe->demodulator_priv;
651 u8 buf[5];
652 u32 noise;
653 u32 c;
654
655 switch(state->current_modulation) {
656 case VSB_8:
657 i2c_read_demod_bytes(state, LGDT3303_EQPH_ERR0, buf, 5);
658#ifdef USE_EQMSE
659
660
661 noise = ((buf[0] & 0x78) << 13) | (buf[1] << 8) | buf[2];
662 c = 73957994;
663#else
664
665
666 noise = ((buf[0] & 7) << 16) | (buf[3] << 8) | buf[4];
667 c = 73957994;
668#endif
669 break;
670 case QAM_64:
671 case QAM_256:
672 i2c_read_demod_bytes(state, CARRIER_MSEQAM1, buf, 2);
673 noise = (buf[0] << 8) | buf[1];
674 c = state->current_modulation == QAM_64 ? 97939837 : 98026066;
675
676 break;
677 default:
678 printk(KERN_ERR "lgdt330x: %s: Modulation set to unsupported value\n",
679 __func__);
680 return -EREMOTEIO;
681 }
682
683 state->snr = calculate_snr(noise, c);
684 *snr = (state->snr) >> 16;
685
686 dprintk("%s: noise = 0x%08x, snr = %d.%02d dB\n", __func__, noise,
687 state->snr >> 24, (((state->snr >> 8) & 0xffff) * 100) >> 16);
688
689 return 0;
690}
691
692static int lgdt330x_read_signal_strength(struct dvb_frontend* fe, u16* strength)
693{
694
695
696
697 struct lgdt330x_state* state = (struct lgdt330x_state*) fe->demodulator_priv;
698 u16 snr;
699 int ret;
700
701 ret = fe->ops.read_snr(fe, &snr);
702 if (ret != 0)
703 return ret;
704
705
706 if (state->snr >= 8960 * 0x10000)
707 *strength = 0xffff;
708 else
709 *strength = state->snr / 8960;
710
711 return 0;
712}
713
714static int lgdt330x_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fe_tune_settings)
715{
716
717 fe_tune_settings->min_delay_ms = 500;
718 fe_tune_settings->step_size = 0;
719 fe_tune_settings->max_drift = 0;
720 return 0;
721}
722
723static void lgdt330x_release(struct dvb_frontend* fe)
724{
725 struct lgdt330x_state* state = (struct lgdt330x_state*) fe->demodulator_priv;
726 kfree(state);
727}
728
729static struct dvb_frontend_ops lgdt3302_ops;
730static struct dvb_frontend_ops lgdt3303_ops;
731
732struct dvb_frontend* lgdt330x_attach(const struct lgdt330x_config* config,
733 struct i2c_adapter* i2c)
734{
735 struct lgdt330x_state* state = NULL;
736 u8 buf[1];
737
738
739 state = kzalloc(sizeof(struct lgdt330x_state), GFP_KERNEL);
740 if (state == NULL)
741 goto error;
742
743
744 state->config = config;
745 state->i2c = i2c;
746
747
748 switch (config->demod_chip) {
749 case LGDT3302:
750 memcpy(&state->frontend.ops, &lgdt3302_ops, sizeof(struct dvb_frontend_ops));
751 break;
752 case LGDT3303:
753 memcpy(&state->frontend.ops, &lgdt3303_ops, sizeof(struct dvb_frontend_ops));
754 break;
755 default:
756 goto error;
757 }
758 state->frontend.demodulator_priv = state;
759
760
761 if (i2c_read_demod_bytes(state, 2, buf, 1))
762 goto error;
763
764 state->current_frequency = -1;
765 state->current_modulation = -1;
766
767 return &state->frontend;
768
769error:
770 kfree(state);
771 dprintk("%s: ERROR\n",__func__);
772 return NULL;
773}
774
775static struct dvb_frontend_ops lgdt3302_ops = {
776 .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B },
777 .info = {
778 .name= "LG Electronics LGDT3302 VSB/QAM Frontend",
779 .frequency_min= 54000000,
780 .frequency_max= 858000000,
781 .frequency_stepsize= 62500,
782 .symbol_rate_min = 5056941,
783 .symbol_rate_max = 10762000,
784 .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB
785 },
786 .init = lgdt330x_init,
787 .set_frontend = lgdt330x_set_parameters,
788 .get_frontend = lgdt330x_get_frontend,
789 .get_tune_settings = lgdt330x_get_tune_settings,
790 .read_status = lgdt3302_read_status,
791 .read_ber = lgdt330x_read_ber,
792 .read_signal_strength = lgdt330x_read_signal_strength,
793 .read_snr = lgdt3302_read_snr,
794 .read_ucblocks = lgdt330x_read_ucblocks,
795 .release = lgdt330x_release,
796};
797
798static struct dvb_frontend_ops lgdt3303_ops = {
799 .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B },
800 .info = {
801 .name= "LG Electronics LGDT3303 VSB/QAM Frontend",
802 .frequency_min= 54000000,
803 .frequency_max= 858000000,
804 .frequency_stepsize= 62500,
805 .symbol_rate_min = 5056941,
806 .symbol_rate_max = 10762000,
807 .caps = FE_CAN_QAM_64 | FE_CAN_QAM_256 | FE_CAN_8VSB
808 },
809 .init = lgdt330x_init,
810 .set_frontend = lgdt330x_set_parameters,
811 .get_frontend = lgdt330x_get_frontend,
812 .get_tune_settings = lgdt330x_get_tune_settings,
813 .read_status = lgdt3303_read_status,
814 .read_ber = lgdt330x_read_ber,
815 .read_signal_strength = lgdt330x_read_signal_strength,
816 .read_snr = lgdt3303_read_snr,
817 .read_ucblocks = lgdt330x_read_ucblocks,
818 .release = lgdt330x_release,
819};
820
821MODULE_DESCRIPTION("LGDT330X (ATSC 8VSB & ITU-T J.83 AnnexB 64/256 QAM) Demodulator Driver");
822MODULE_AUTHOR("Wilson Michaels");
823MODULE_LICENSE("GPL");
824
825EXPORT_SYMBOL(lgdt330x_attach);
826
827
828
829
830
831
832