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24#include <linux/kernel.h>
25#include <linux/module.h>
26#include <linux/slab.h>
27#include <linux/i2c.h>
28#include "dvb_frontend.h"
29#include "va1j5jf8007s.h"
30
31enum va1j5jf8007s_tune_state {
32 VA1J5JF8007S_IDLE,
33 VA1J5JF8007S_SET_FREQUENCY_1,
34 VA1J5JF8007S_SET_FREQUENCY_2,
35 VA1J5JF8007S_SET_FREQUENCY_3,
36 VA1J5JF8007S_CHECK_FREQUENCY,
37 VA1J5JF8007S_SET_MODULATION,
38 VA1J5JF8007S_CHECK_MODULATION,
39 VA1J5JF8007S_SET_TS_ID,
40 VA1J5JF8007S_CHECK_TS_ID,
41 VA1J5JF8007S_TRACK,
42};
43
44struct va1j5jf8007s_state {
45 const struct va1j5jf8007s_config *config;
46 struct i2c_adapter *adap;
47 struct dvb_frontend fe;
48 enum va1j5jf8007s_tune_state tune_state;
49};
50
51static int va1j5jf8007s_read_snr(struct dvb_frontend *fe, u16 *snr)
52{
53 struct va1j5jf8007s_state *state;
54 u8 addr;
55 int i;
56 u8 write_buf[1], read_buf[1];
57 struct i2c_msg msgs[2];
58 s32 word, x1, x2, x3, x4, x5, y;
59
60 state = fe->demodulator_priv;
61 addr = state->config->demod_address;
62
63 word = 0;
64 for (i = 0; i < 2; i++) {
65 write_buf[0] = 0xbc + i;
66
67 msgs[0].addr = addr;
68 msgs[0].flags = 0;
69 msgs[0].len = sizeof(write_buf);
70 msgs[0].buf = write_buf;
71
72 msgs[1].addr = addr;
73 msgs[1].flags = I2C_M_RD;
74 msgs[1].len = sizeof(read_buf);
75 msgs[1].buf = read_buf;
76
77 if (i2c_transfer(state->adap, msgs, 2) != 2)
78 return -EREMOTEIO;
79
80 word <<= 8;
81 word |= read_buf[0];
82 }
83
84 word -= 3000;
85 if (word < 0)
86 word = 0;
87
88 x1 = int_sqrt(word << 16) * ((15625ll << 21) / 1000000);
89 x2 = (s64)x1 * x1 >> 31;
90 x3 = (s64)x2 * x1 >> 31;
91 x4 = (s64)x2 * x2 >> 31;
92 x5 = (s64)x4 * x1 >> 31;
93
94 y = (58857ll << 23) / 1000;
95 y -= (s64)x1 * ((89565ll << 24) / 1000) >> 30;
96 y += (s64)x2 * ((88977ll << 24) / 1000) >> 28;
97 y -= (s64)x3 * ((50259ll << 25) / 1000) >> 27;
98 y += (s64)x4 * ((14341ll << 27) / 1000) >> 27;
99 y -= (s64)x5 * ((16346ll << 30) / 10000) >> 28;
100
101 *snr = y < 0 ? 0 : y >> 15;
102 return 0;
103}
104
105static int va1j5jf8007s_get_frontend_algo(struct dvb_frontend *fe)
106{
107 return DVBFE_ALGO_HW;
108}
109
110static int
111va1j5jf8007s_read_status(struct dvb_frontend *fe, fe_status_t *status)
112{
113 struct va1j5jf8007s_state *state;
114
115 state = fe->demodulator_priv;
116
117 switch (state->tune_state) {
118 case VA1J5JF8007S_IDLE:
119 case VA1J5JF8007S_SET_FREQUENCY_1:
120 case VA1J5JF8007S_SET_FREQUENCY_2:
121 case VA1J5JF8007S_SET_FREQUENCY_3:
122 case VA1J5JF8007S_CHECK_FREQUENCY:
123 *status = 0;
124 return 0;
125
126
127 case VA1J5JF8007S_SET_MODULATION:
128 case VA1J5JF8007S_CHECK_MODULATION:
129 *status |= FE_HAS_SIGNAL;
130 return 0;
131
132 case VA1J5JF8007S_SET_TS_ID:
133 case VA1J5JF8007S_CHECK_TS_ID:
134 *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER;
135 return 0;
136
137 case VA1J5JF8007S_TRACK:
138 *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_LOCK;
139 return 0;
140 }
141
142 BUG();
143}
144
145struct va1j5jf8007s_cb_map {
146 u32 frequency;
147 u8 cb;
148};
149
150static const struct va1j5jf8007s_cb_map va1j5jf8007s_cb_maps[] = {
151 { 986000, 0xb2 },
152 { 1072000, 0xd2 },
153 { 1154000, 0xe2 },
154 { 1291000, 0x20 },
155 { 1447000, 0x40 },
156 { 1615000, 0x60 },
157 { 1791000, 0x80 },
158 { 1972000, 0xa0 },
159};
160
161static u8 va1j5jf8007s_lookup_cb(u32 frequency)
162{
163 int i;
164 const struct va1j5jf8007s_cb_map *map;
165
166 for (i = 0; i < ARRAY_SIZE(va1j5jf8007s_cb_maps); i++) {
167 map = &va1j5jf8007s_cb_maps[i];
168 if (frequency < map->frequency)
169 return map->cb;
170 }
171 return 0xc0;
172}
173
174static int va1j5jf8007s_set_frequency_1(struct va1j5jf8007s_state *state)
175{
176 u32 frequency;
177 u16 word;
178 u8 buf[6];
179 struct i2c_msg msg;
180
181 frequency = state->fe.dtv_property_cache.frequency;
182
183 word = (frequency + 500) / 1000;
184 if (frequency < 1072000)
185 word = (word << 1 & ~0x1f) | (word & 0x0f);
186
187 buf[0] = 0xfe;
188 buf[1] = 0xc0;
189 buf[2] = 0x40 | word >> 8;
190 buf[3] = word;
191 buf[4] = 0xe0;
192 buf[5] = va1j5jf8007s_lookup_cb(frequency);
193
194 msg.addr = state->config->demod_address;
195 msg.flags = 0;
196 msg.len = sizeof(buf);
197 msg.buf = buf;
198
199 if (i2c_transfer(state->adap, &msg, 1) != 1)
200 return -EREMOTEIO;
201
202 return 0;
203}
204
205static int va1j5jf8007s_set_frequency_2(struct va1j5jf8007s_state *state)
206{
207 u8 buf[3];
208 struct i2c_msg msg;
209
210 buf[0] = 0xfe;
211 buf[1] = 0xc0;
212 buf[2] = 0xe4;
213
214 msg.addr = state->config->demod_address;
215 msg.flags = 0;
216 msg.len = sizeof(buf);
217 msg.buf = buf;
218
219 if (i2c_transfer(state->adap, &msg, 1) != 1)
220 return -EREMOTEIO;
221
222 return 0;
223}
224
225static int va1j5jf8007s_set_frequency_3(struct va1j5jf8007s_state *state)
226{
227 u32 frequency;
228 u8 buf[4];
229 struct i2c_msg msg;
230
231 frequency = state->fe.dtv_property_cache.frequency;
232
233 buf[0] = 0xfe;
234 buf[1] = 0xc0;
235 buf[2] = 0xf4;
236 buf[3] = va1j5jf8007s_lookup_cb(frequency) | 0x4;
237
238 msg.addr = state->config->demod_address;
239 msg.flags = 0;
240 msg.len = sizeof(buf);
241 msg.buf = buf;
242
243 if (i2c_transfer(state->adap, &msg, 1) != 1)
244 return -EREMOTEIO;
245
246 return 0;
247}
248
249static int
250va1j5jf8007s_check_frequency(struct va1j5jf8007s_state *state, int *lock)
251{
252 u8 addr;
253 u8 write_buf[2], read_buf[1];
254 struct i2c_msg msgs[2];
255
256 addr = state->config->demod_address;
257
258 write_buf[0] = 0xfe;
259 write_buf[1] = 0xc1;
260
261 msgs[0].addr = addr;
262 msgs[0].flags = 0;
263 msgs[0].len = sizeof(write_buf);
264 msgs[0].buf = write_buf;
265
266 msgs[1].addr = addr;
267 msgs[1].flags = I2C_M_RD;
268 msgs[1].len = sizeof(read_buf);
269 msgs[1].buf = read_buf;
270
271 if (i2c_transfer(state->adap, msgs, 2) != 2)
272 return -EREMOTEIO;
273
274 *lock = read_buf[0] & 0x40;
275 return 0;
276}
277
278static int va1j5jf8007s_set_modulation(struct va1j5jf8007s_state *state)
279{
280 u8 buf[2];
281 struct i2c_msg msg;
282
283 buf[0] = 0x03;
284 buf[1] = 0x01;
285
286 msg.addr = state->config->demod_address;
287 msg.flags = 0;
288 msg.len = sizeof(buf);
289 msg.buf = buf;
290
291 if (i2c_transfer(state->adap, &msg, 1) != 1)
292 return -EREMOTEIO;
293
294 return 0;
295}
296
297static int
298va1j5jf8007s_check_modulation(struct va1j5jf8007s_state *state, int *lock)
299{
300 u8 addr;
301 u8 write_buf[1], read_buf[1];
302 struct i2c_msg msgs[2];
303
304 addr = state->config->demod_address;
305
306 write_buf[0] = 0xc3;
307
308 msgs[0].addr = addr;
309 msgs[0].flags = 0;
310 msgs[0].len = sizeof(write_buf);
311 msgs[0].buf = write_buf;
312
313 msgs[1].addr = addr;
314 msgs[1].flags = I2C_M_RD;
315 msgs[1].len = sizeof(read_buf);
316 msgs[1].buf = read_buf;
317
318 if (i2c_transfer(state->adap, msgs, 2) != 2)
319 return -EREMOTEIO;
320
321 *lock = !(read_buf[0] & 0x10);
322 return 0;
323}
324
325static int
326va1j5jf8007s_set_ts_id(struct va1j5jf8007s_state *state)
327{
328 u32 ts_id;
329 u8 buf[3];
330 struct i2c_msg msg;
331
332 ts_id = state->fe.dtv_property_cache.isdbs_ts_id;
333 if (!ts_id)
334 return 0;
335
336 buf[0] = 0x8f;
337 buf[1] = ts_id >> 8;
338 buf[2] = ts_id;
339
340 msg.addr = state->config->demod_address;
341 msg.flags = 0;
342 msg.len = sizeof(buf);
343 msg.buf = buf;
344
345 if (i2c_transfer(state->adap, &msg, 1) != 1)
346 return -EREMOTEIO;
347
348 return 0;
349}
350
351static int
352va1j5jf8007s_check_ts_id(struct va1j5jf8007s_state *state, int *lock)
353{
354 u8 addr;
355 u8 write_buf[1], read_buf[2];
356 struct i2c_msg msgs[2];
357 u32 ts_id;
358
359 ts_id = state->fe.dtv_property_cache.isdbs_ts_id;
360 if (!ts_id) {
361 *lock = 1;
362 return 0;
363 }
364
365 addr = state->config->demod_address;
366
367 write_buf[0] = 0xe6;
368
369 msgs[0].addr = addr;
370 msgs[0].flags = 0;
371 msgs[0].len = sizeof(write_buf);
372 msgs[0].buf = write_buf;
373
374 msgs[1].addr = addr;
375 msgs[1].flags = I2C_M_RD;
376 msgs[1].len = sizeof(read_buf);
377 msgs[1].buf = read_buf;
378
379 if (i2c_transfer(state->adap, msgs, 2) != 2)
380 return -EREMOTEIO;
381
382 *lock = (read_buf[0] << 8 | read_buf[1]) == ts_id;
383 return 0;
384}
385
386static int
387va1j5jf8007s_tune(struct dvb_frontend *fe,
388 bool re_tune,
389 unsigned int mode_flags, unsigned int *delay,
390 fe_status_t *status)
391{
392 struct va1j5jf8007s_state *state;
393 int ret;
394 int lock = 0;
395
396 state = fe->demodulator_priv;
397
398 if (re_tune)
399 state->tune_state = VA1J5JF8007S_SET_FREQUENCY_1;
400
401 switch (state->tune_state) {
402 case VA1J5JF8007S_IDLE:
403 *delay = 3 * HZ;
404 *status = 0;
405 return 0;
406
407 case VA1J5JF8007S_SET_FREQUENCY_1:
408 ret = va1j5jf8007s_set_frequency_1(state);
409 if (ret < 0)
410 return ret;
411
412 state->tune_state = VA1J5JF8007S_SET_FREQUENCY_2;
413 *delay = 0;
414 *status = 0;
415 return 0;
416
417 case VA1J5JF8007S_SET_FREQUENCY_2:
418 ret = va1j5jf8007s_set_frequency_2(state);
419 if (ret < 0)
420 return ret;
421
422 state->tune_state = VA1J5JF8007S_SET_FREQUENCY_3;
423 *delay = (HZ + 99) / 100;
424 *status = 0;
425 return 0;
426
427 case VA1J5JF8007S_SET_FREQUENCY_3:
428 ret = va1j5jf8007s_set_frequency_3(state);
429 if (ret < 0)
430 return ret;
431
432 state->tune_state = VA1J5JF8007S_CHECK_FREQUENCY;
433 *delay = 0;
434 *status = 0;
435 return 0;
436
437 case VA1J5JF8007S_CHECK_FREQUENCY:
438 ret = va1j5jf8007s_check_frequency(state, &lock);
439 if (ret < 0)
440 return ret;
441
442 if (!lock) {
443 *delay = (HZ + 999) / 1000;
444 *status = 0;
445 return 0;
446 }
447
448 state->tune_state = VA1J5JF8007S_SET_MODULATION;
449 *delay = 0;
450 *status = FE_HAS_SIGNAL;
451 return 0;
452
453 case VA1J5JF8007S_SET_MODULATION:
454 ret = va1j5jf8007s_set_modulation(state);
455 if (ret < 0)
456 return ret;
457
458 state->tune_state = VA1J5JF8007S_CHECK_MODULATION;
459 *delay = 0;
460 *status = FE_HAS_SIGNAL;
461 return 0;
462
463 case VA1J5JF8007S_CHECK_MODULATION:
464 ret = va1j5jf8007s_check_modulation(state, &lock);
465 if (ret < 0)
466 return ret;
467
468 if (!lock) {
469 *delay = (HZ + 49) / 50;
470 *status = FE_HAS_SIGNAL;
471 return 0;
472 }
473
474 state->tune_state = VA1J5JF8007S_SET_TS_ID;
475 *delay = 0;
476 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
477 return 0;
478
479 case VA1J5JF8007S_SET_TS_ID:
480 ret = va1j5jf8007s_set_ts_id(state);
481 if (ret < 0)
482 return ret;
483
484 state->tune_state = VA1J5JF8007S_CHECK_TS_ID;
485 return 0;
486
487 case VA1J5JF8007S_CHECK_TS_ID:
488 ret = va1j5jf8007s_check_ts_id(state, &lock);
489 if (ret < 0)
490 return ret;
491
492 if (!lock) {
493 *delay = (HZ + 99) / 100;
494 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
495 return 0;
496 }
497
498 state->tune_state = VA1J5JF8007S_TRACK;
499
500
501 case VA1J5JF8007S_TRACK:
502 *delay = 3 * HZ;
503 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_LOCK;
504 return 0;
505 }
506
507 BUG();
508}
509
510static int va1j5jf8007s_init_frequency(struct va1j5jf8007s_state *state)
511{
512 u8 buf[4];
513 struct i2c_msg msg;
514
515 buf[0] = 0xfe;
516 buf[1] = 0xc0;
517 buf[2] = 0xf0;
518 buf[3] = 0x04;
519
520 msg.addr = state->config->demod_address;
521 msg.flags = 0;
522 msg.len = sizeof(buf);
523 msg.buf = buf;
524
525 if (i2c_transfer(state->adap, &msg, 1) != 1)
526 return -EREMOTEIO;
527
528 return 0;
529}
530
531static int va1j5jf8007s_set_sleep(struct va1j5jf8007s_state *state, int sleep)
532{
533 u8 buf[2];
534 struct i2c_msg msg;
535
536 buf[0] = 0x17;
537 buf[1] = sleep ? 0x01 : 0x00;
538
539 msg.addr = state->config->demod_address;
540 msg.flags = 0;
541 msg.len = sizeof(buf);
542 msg.buf = buf;
543
544 if (i2c_transfer(state->adap, &msg, 1) != 1)
545 return -EREMOTEIO;
546
547 return 0;
548}
549
550static int va1j5jf8007s_sleep(struct dvb_frontend *fe)
551{
552 struct va1j5jf8007s_state *state;
553 int ret;
554
555 state = fe->demodulator_priv;
556
557 ret = va1j5jf8007s_init_frequency(state);
558 if (ret < 0)
559 return ret;
560
561 return va1j5jf8007s_set_sleep(state, 1);
562}
563
564static int va1j5jf8007s_init(struct dvb_frontend *fe)
565{
566 struct va1j5jf8007s_state *state;
567
568 state = fe->demodulator_priv;
569 state->tune_state = VA1J5JF8007S_IDLE;
570
571 return va1j5jf8007s_set_sleep(state, 0);
572}
573
574static void va1j5jf8007s_release(struct dvb_frontend *fe)
575{
576 struct va1j5jf8007s_state *state;
577 state = fe->demodulator_priv;
578 kfree(state);
579}
580
581static struct dvb_frontend_ops va1j5jf8007s_ops = {
582 .delsys = { SYS_ISDBS },
583 .info = {
584 .name = "VA1J5JF8007/VA1J5JF8011 ISDB-S",
585 .frequency_min = 950000,
586 .frequency_max = 2150000,
587 .frequency_stepsize = 1000,
588 .caps = FE_CAN_INVERSION_AUTO | FE_CAN_FEC_AUTO |
589 FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO |
590 FE_CAN_GUARD_INTERVAL_AUTO | FE_CAN_HIERARCHY_AUTO,
591 },
592
593 .read_snr = va1j5jf8007s_read_snr,
594 .get_frontend_algo = va1j5jf8007s_get_frontend_algo,
595 .read_status = va1j5jf8007s_read_status,
596 .tune = va1j5jf8007s_tune,
597 .sleep = va1j5jf8007s_sleep,
598 .init = va1j5jf8007s_init,
599 .release = va1j5jf8007s_release,
600};
601
602static int va1j5jf8007s_prepare_1(struct va1j5jf8007s_state *state)
603{
604 u8 addr;
605 u8 write_buf[1], read_buf[1];
606 struct i2c_msg msgs[2];
607
608 addr = state->config->demod_address;
609
610 write_buf[0] = 0x07;
611
612 msgs[0].addr = addr;
613 msgs[0].flags = 0;
614 msgs[0].len = sizeof(write_buf);
615 msgs[0].buf = write_buf;
616
617 msgs[1].addr = addr;
618 msgs[1].flags = I2C_M_RD;
619 msgs[1].len = sizeof(read_buf);
620 msgs[1].buf = read_buf;
621
622 if (i2c_transfer(state->adap, msgs, 2) != 2)
623 return -EREMOTEIO;
624
625 if (read_buf[0] != 0x41)
626 return -EIO;
627
628 return 0;
629}
630
631static const u8 va1j5jf8007s_20mhz_prepare_bufs[][2] = {
632 {0x04, 0x02}, {0x0d, 0x55}, {0x11, 0x40}, {0x13, 0x80}, {0x17, 0x01},
633 {0x1c, 0x0a}, {0x1d, 0xaa}, {0x1e, 0x20}, {0x1f, 0x88}, {0x51, 0xb0},
634 {0x52, 0x89}, {0x53, 0xb3}, {0x5a, 0x2d}, {0x5b, 0xd3}, {0x85, 0x69},
635 {0x87, 0x04}, {0x8e, 0x02}, {0xa3, 0xf7}, {0xa5, 0xc0},
636};
637
638static const u8 va1j5jf8007s_25mhz_prepare_bufs[][2] = {
639 {0x04, 0x02}, {0x11, 0x40}, {0x13, 0x80}, {0x17, 0x01}, {0x1c, 0x0a},
640 {0x1d, 0xaa}, {0x1e, 0x20}, {0x1f, 0x88}, {0x51, 0xb0}, {0x52, 0x89},
641 {0x53, 0xb3}, {0x5a, 0x2d}, {0x5b, 0xd3}, {0x85, 0x69}, {0x87, 0x04},
642 {0x8e, 0x26}, {0xa3, 0xf7}, {0xa5, 0xc0},
643};
644
645static int va1j5jf8007s_prepare_2(struct va1j5jf8007s_state *state)
646{
647 const u8 (*bufs)[2];
648 int size;
649 u8 addr;
650 u8 buf[2];
651 struct i2c_msg msg;
652 int i;
653
654 switch (state->config->frequency) {
655 case VA1J5JF8007S_20MHZ:
656 bufs = va1j5jf8007s_20mhz_prepare_bufs;
657 size = ARRAY_SIZE(va1j5jf8007s_20mhz_prepare_bufs);
658 break;
659 case VA1J5JF8007S_25MHZ:
660 bufs = va1j5jf8007s_25mhz_prepare_bufs;
661 size = ARRAY_SIZE(va1j5jf8007s_25mhz_prepare_bufs);
662 break;
663 default:
664 return -EINVAL;
665 }
666
667 addr = state->config->demod_address;
668
669 msg.addr = addr;
670 msg.flags = 0;
671 msg.len = 2;
672 msg.buf = buf;
673 for (i = 0; i < size; i++) {
674 memcpy(buf, bufs[i], sizeof(buf));
675 if (i2c_transfer(state->adap, &msg, 1) != 1)
676 return -EREMOTEIO;
677 }
678
679 return 0;
680}
681
682
683int va1j5jf8007s_prepare(struct dvb_frontend *fe)
684{
685 struct va1j5jf8007s_state *state;
686 int ret;
687
688 state = fe->demodulator_priv;
689
690 ret = va1j5jf8007s_prepare_1(state);
691 if (ret < 0)
692 return ret;
693
694 ret = va1j5jf8007s_prepare_2(state);
695 if (ret < 0)
696 return ret;
697
698 return va1j5jf8007s_init_frequency(state);
699}
700
701struct dvb_frontend *
702va1j5jf8007s_attach(const struct va1j5jf8007s_config *config,
703 struct i2c_adapter *adap)
704{
705 struct va1j5jf8007s_state *state;
706 struct dvb_frontend *fe;
707 u8 buf[2];
708 struct i2c_msg msg;
709
710 state = kzalloc(sizeof(struct va1j5jf8007s_state), GFP_KERNEL);
711 if (!state)
712 return NULL;
713
714 state->config = config;
715 state->adap = adap;
716
717 fe = &state->fe;
718 memcpy(&fe->ops, &va1j5jf8007s_ops, sizeof(struct dvb_frontend_ops));
719 fe->demodulator_priv = state;
720
721 buf[0] = 0x01;
722 buf[1] = 0x80;
723
724 msg.addr = state->config->demod_address;
725 msg.flags = 0;
726 msg.len = sizeof(buf);
727 msg.buf = buf;
728
729 if (i2c_transfer(state->adap, &msg, 1) != 1) {
730 kfree(state);
731 return NULL;
732 }
733
734 return fe;
735}
736
