1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Toshiba TC90522 Demodulator
4 *
5 * Copyright (C) 2014 Akihiro Tsukada <tskd08@gmail.com>
6 */
7
8 /*
9 * NOTICE:
10 * This driver is incomplete and lacks init/config of the chips,
11 * as the necessary info is not disclosed.
12 * It assumes that users of this driver (such as a PCI bridge of
13 * DTV receiver cards) properly init and configure the chip
14 * via I2C *before* calling this driver's init() function.
15 *
16 * Currently, PT3 driver is the only one that uses this driver,
17 * and contains init/config code in its firmware.
18 * Thus some part of the code might be dependent on PT3 specific config.
19 */
20
21 #include <linux/kernel.h>
22 #include <linux/math64.h>
23 #include <linux/dvb/frontend.h>
24 #include <linux/int_log.h>
25 #include "tc90522.h"
26
27 #define TC90522_I2C_THRU_REG 0xfe
28
29 #define TC90522_MODULE_IDX(addr) (((u8)(addr) & 0x02U) >> 1)
30
31 struct tc90522_state {
32 struct tc90522_config cfg;
33 struct dvb_frontend fe;
34 struct i2c_client *i2c_client;
35 struct i2c_adapter tuner_i2c;
36
37 bool lna;
38 };
39
40 struct reg_val {
41 u8 reg;
42 u8 val;
43 };
44
45 static int
reg_write(struct tc90522_state * state,const struct reg_val * regs,int num)46 reg_write(struct tc90522_state *state, const struct reg_val *regs, int num)
47 {
48 int i, ret;
49 struct i2c_msg msg;
50
51 ret = 0;
52 msg.addr = state->i2c_client->addr;
53 msg.flags = 0;
54 msg.len = 2;
55 for (i = 0; i < num; i++) {
56 msg.buf = (u8 *)®s[i];
57 ret = i2c_transfer(state->i2c_client->adapter, &msg, 1);
58 if (ret == 0)
59 ret = -EIO;
60 if (ret < 0)
61 return ret;
62 }
63 return 0;
64 }
65
reg_read(struct tc90522_state * state,u8 reg,u8 * val,u8 len)66 static int reg_read(struct tc90522_state *state, u8 reg, u8 *val, u8 len)
67 {
68 struct i2c_msg msgs[2] = {
69 {
70 .addr = state->i2c_client->addr,
71 .flags = 0,
72 .buf = ®,
73 .len = 1,
74 },
75 {
76 .addr = state->i2c_client->addr,
77 .flags = I2C_M_RD,
78 .buf = val,
79 .len = len,
80 },
81 };
82 int ret;
83
84 ret = i2c_transfer(state->i2c_client->adapter, msgs, ARRAY_SIZE(msgs));
85 if (ret == ARRAY_SIZE(msgs))
86 ret = 0;
87 else if (ret >= 0)
88 ret = -EIO;
89 return ret;
90 }
91
cfg_to_state(struct tc90522_config * c)92 static struct tc90522_state *cfg_to_state(struct tc90522_config *c)
93 {
94 return container_of(c, struct tc90522_state, cfg);
95 }
96
97
tc90522s_set_tsid(struct dvb_frontend * fe)98 static int tc90522s_set_tsid(struct dvb_frontend *fe)
99 {
100 struct reg_val set_tsid[] = {
101 { 0x8f, 00 },
102 { 0x90, 00 }
103 };
104
105 set_tsid[0].val = (fe->dtv_property_cache.stream_id & 0xff00) >> 8;
106 set_tsid[1].val = fe->dtv_property_cache.stream_id & 0xff;
107 return reg_write(fe->demodulator_priv, set_tsid, ARRAY_SIZE(set_tsid));
108 }
109
tc90522t_set_layers(struct dvb_frontend * fe)110 static int tc90522t_set_layers(struct dvb_frontend *fe)
111 {
112 struct reg_val rv;
113 u8 laysel;
114
115 laysel = ~fe->dtv_property_cache.isdbt_layer_enabled & 0x07;
116 laysel = (laysel & 0x01) << 2 | (laysel & 0x02) | (laysel & 0x04) >> 2;
117 rv.reg = 0x71;
118 rv.val = laysel;
119 return reg_write(fe->demodulator_priv, &rv, 1);
120 }
121
122 /* frontend ops */
123
tc90522s_read_status(struct dvb_frontend * fe,enum fe_status * status)124 static int tc90522s_read_status(struct dvb_frontend *fe, enum fe_status *status)
125 {
126 struct tc90522_state *state;
127 int ret;
128 u8 reg;
129
130 state = fe->demodulator_priv;
131 ret = reg_read(state, 0xc3, ®, 1);
132 if (ret < 0)
133 return ret;
134
135 *status = 0;
136 if (reg & 0x80) /* input level under min ? */
137 return 0;
138 *status |= FE_HAS_SIGNAL;
139
140 if (reg & 0x60) /* carrier? */
141 return 0;
142 *status |= FE_HAS_CARRIER | FE_HAS_VITERBI | FE_HAS_SYNC;
143
144 if (reg & 0x10)
145 return 0;
146 if (reg_read(state, 0xc5, ®, 1) < 0 || !(reg & 0x03))
147 return 0;
148 *status |= FE_HAS_LOCK;
149 return 0;
150 }
151
tc90522t_read_status(struct dvb_frontend * fe,enum fe_status * status)152 static int tc90522t_read_status(struct dvb_frontend *fe, enum fe_status *status)
153 {
154 struct tc90522_state *state;
155 int ret;
156 u8 reg;
157
158 state = fe->demodulator_priv;
159 ret = reg_read(state, 0x96, ®, 1);
160 if (ret < 0)
161 return ret;
162
163 *status = 0;
164 if (reg & 0xe0) {
165 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI
166 | FE_HAS_SYNC | FE_HAS_LOCK;
167 return 0;
168 }
169
170 ret = reg_read(state, 0x80, ®, 1);
171 if (ret < 0)
172 return ret;
173
174 if (reg & 0xf0)
175 return 0;
176 *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER;
177
178 if (reg & 0x0c)
179 return 0;
180 *status |= FE_HAS_SYNC | FE_HAS_VITERBI;
181
182 if (reg & 0x02)
183 return 0;
184 *status |= FE_HAS_LOCK;
185 return 0;
186 }
187
188 static const enum fe_code_rate fec_conv_sat[] = {
189 FEC_NONE, /* unused */
190 FEC_1_2, /* for BPSK */
191 FEC_1_2, FEC_2_3, FEC_3_4, FEC_5_6, FEC_7_8, /* for QPSK */
192 FEC_2_3, /* for 8PSK. (trellis code) */
193 };
194
tc90522s_get_frontend(struct dvb_frontend * fe,struct dtv_frontend_properties * c)195 static int tc90522s_get_frontend(struct dvb_frontend *fe,
196 struct dtv_frontend_properties *c)
197 {
198 struct tc90522_state *state;
199 struct dtv_fe_stats *stats;
200 int ret, i;
201 int layers;
202 u8 val[10];
203 u32 cndat;
204
205 state = fe->demodulator_priv;
206 c->delivery_system = SYS_ISDBS;
207 c->symbol_rate = 28860000;
208
209 layers = 0;
210 ret = reg_read(state, 0xe6, val, 5);
211 if (ret == 0) {
212 u8 v;
213
214 c->stream_id = val[0] << 8 | val[1];
215
216 /* high/single layer */
217 v = (val[2] & 0x70) >> 4;
218 c->modulation = (v == 7) ? PSK_8 : QPSK;
219 c->fec_inner = fec_conv_sat[v];
220 c->layer[0].fec = c->fec_inner;
221 c->layer[0].modulation = c->modulation;
222 c->layer[0].segment_count = val[3] & 0x3f; /* slots */
223
224 /* low layer */
225 v = (val[2] & 0x07);
226 c->layer[1].fec = fec_conv_sat[v];
227 if (v == 0) /* no low layer */
228 c->layer[1].segment_count = 0;
229 else
230 c->layer[1].segment_count = val[4] & 0x3f; /* slots */
231 /*
232 * actually, BPSK if v==1, but not defined in
233 * enum fe_modulation
234 */
235 c->layer[1].modulation = QPSK;
236 layers = (v > 0) ? 2 : 1;
237 }
238
239 /* statistics */
240
241 stats = &c->strength;
242 stats->len = 0;
243 /* let the connected tuner set RSSI property cache */
244 if (fe->ops.tuner_ops.get_rf_strength) {
245 u16 dummy;
246
247 fe->ops.tuner_ops.get_rf_strength(fe, &dummy);
248 }
249
250 stats = &c->cnr;
251 stats->len = 1;
252 stats->stat[0].scale = FE_SCALE_NOT_AVAILABLE;
253 cndat = 0;
254 ret = reg_read(state, 0xbc, val, 2);
255 if (ret == 0)
256 cndat = val[0] << 8 | val[1];
257 if (cndat >= 3000) {
258 u32 p, p4;
259 s64 cn;
260
261 cndat -= 3000; /* cndat: 4.12 fixed point float */
262 /*
263 * cnr[mdB] = -1634.6 * P^5 + 14341 * P^4 - 50259 * P^3
264 * + 88977 * P^2 - 89565 * P + 58857
265 * (P = sqrt(cndat) / 64)
266 */
267 /* p := sqrt(cndat) << 8 = P << 14, 2.14 fixed point float */
268 /* cn = cnr << 3 */
269 p = int_sqrt(cndat << 16);
270 p4 = cndat * cndat;
271 cn = div64_s64(-16346LL * p4 * p, 10) >> 35;
272 cn += (14341LL * p4) >> 21;
273 cn -= (50259LL * cndat * p) >> 23;
274 cn += (88977LL * cndat) >> 9;
275 cn -= (89565LL * p) >> 11;
276 cn += 58857 << 3;
277 stats->stat[0].svalue = cn >> 3;
278 stats->stat[0].scale = FE_SCALE_DECIBEL;
279 }
280
281 /* per-layer post viterbi BER (or PER? config dependent?) */
282 stats = &c->post_bit_error;
283 memset(stats, 0, sizeof(*stats));
284 stats->len = layers;
285 ret = reg_read(state, 0xeb, val, 10);
286 if (ret < 0)
287 for (i = 0; i < layers; i++)
288 stats->stat[i].scale = FE_SCALE_NOT_AVAILABLE;
289 else {
290 for (i = 0; i < layers; i++) {
291 stats->stat[i].scale = FE_SCALE_COUNTER;
292 stats->stat[i].uvalue = val[i * 5] << 16
293 | val[i * 5 + 1] << 8 | val[i * 5 + 2];
294 }
295 }
296 stats = &c->post_bit_count;
297 memset(stats, 0, sizeof(*stats));
298 stats->len = layers;
299 if (ret < 0)
300 for (i = 0; i < layers; i++)
301 stats->stat[i].scale = FE_SCALE_NOT_AVAILABLE;
302 else {
303 for (i = 0; i < layers; i++) {
304 stats->stat[i].scale = FE_SCALE_COUNTER;
305 stats->stat[i].uvalue =
306 val[i * 5 + 3] << 8 | val[i * 5 + 4];
307 stats->stat[i].uvalue *= 204 * 8;
308 }
309 }
310
311 return 0;
312 }
313
314
315 static const enum fe_transmit_mode tm_conv[] = {
316 TRANSMISSION_MODE_2K,
317 TRANSMISSION_MODE_4K,
318 TRANSMISSION_MODE_8K,
319 0
320 };
321
322 static const enum fe_code_rate fec_conv_ter[] = {
323 FEC_1_2, FEC_2_3, FEC_3_4, FEC_5_6, FEC_7_8, 0, 0, 0
324 };
325
326 static const enum fe_modulation mod_conv[] = {
327 DQPSK, QPSK, QAM_16, QAM_64, 0, 0, 0, 0
328 };
329
tc90522t_get_frontend(struct dvb_frontend * fe,struct dtv_frontend_properties * c)330 static int tc90522t_get_frontend(struct dvb_frontend *fe,
331 struct dtv_frontend_properties *c)
332 {
333 struct tc90522_state *state;
334 struct dtv_fe_stats *stats;
335 int ret, i;
336 int layers;
337 u8 val[15], mode;
338 u32 cndat;
339
340 state = fe->demodulator_priv;
341 c->delivery_system = SYS_ISDBT;
342 c->bandwidth_hz = 6000000;
343 mode = 1;
344 ret = reg_read(state, 0xb0, val, 1);
345 if (ret == 0) {
346 mode = (val[0] & 0xc0) >> 6;
347 c->transmission_mode = tm_conv[mode];
348 c->guard_interval = (val[0] & 0x30) >> 4;
349 }
350
351 ret = reg_read(state, 0xb2, val, 6);
352 layers = 0;
353 if (ret == 0) {
354 u8 v;
355
356 c->isdbt_partial_reception = val[0] & 0x01;
357 c->isdbt_sb_mode = (val[0] & 0xc0) == 0x40;
358
359 /* layer A */
360 v = (val[2] & 0x78) >> 3;
361 if (v == 0x0f)
362 c->layer[0].segment_count = 0;
363 else {
364 layers++;
365 c->layer[0].segment_count = v;
366 c->layer[0].fec = fec_conv_ter[(val[1] & 0x1c) >> 2];
367 c->layer[0].modulation = mod_conv[(val[1] & 0xe0) >> 5];
368 v = (val[1] & 0x03) << 1 | (val[2] & 0x80) >> 7;
369 c->layer[0].interleaving = v;
370 }
371
372 /* layer B */
373 v = (val[3] & 0x03) << 2 | (val[4] & 0xc0) >> 6;
374 if (v == 0x0f)
375 c->layer[1].segment_count = 0;
376 else {
377 layers++;
378 c->layer[1].segment_count = v;
379 c->layer[1].fec = fec_conv_ter[(val[3] & 0xe0) >> 5];
380 c->layer[1].modulation = mod_conv[(val[2] & 0x07)];
381 c->layer[1].interleaving = (val[3] & 0x1c) >> 2;
382 }
383
384 /* layer C */
385 v = (val[5] & 0x1e) >> 1;
386 if (v == 0x0f)
387 c->layer[2].segment_count = 0;
388 else {
389 layers++;
390 c->layer[2].segment_count = v;
391 c->layer[2].fec = fec_conv_ter[(val[4] & 0x07)];
392 c->layer[2].modulation = mod_conv[(val[4] & 0x38) >> 3];
393 c->layer[2].interleaving = (val[5] & 0xe0) >> 5;
394 }
395 }
396
397 /* statistics */
398
399 stats = &c->strength;
400 stats->len = 0;
401 /* let the connected tuner set RSSI property cache */
402 if (fe->ops.tuner_ops.get_rf_strength) {
403 u16 dummy;
404
405 fe->ops.tuner_ops.get_rf_strength(fe, &dummy);
406 }
407
408 stats = &c->cnr;
409 stats->len = 1;
410 stats->stat[0].scale = FE_SCALE_NOT_AVAILABLE;
411 cndat = 0;
412 ret = reg_read(state, 0x8b, val, 3);
413 if (ret == 0)
414 cndat = val[0] << 16 | val[1] << 8 | val[2];
415 if (cndat != 0) {
416 u32 p, tmp;
417 s64 cn;
418
419 /*
420 * cnr[mdB] = 0.024 P^4 - 1.6 P^3 + 39.8 P^2 + 549.1 P + 3096.5
421 * (P = 10log10(5505024/cndat))
422 */
423 /* cn = cnr << 3 (61.3 fixed point float */
424 /* p = 10log10(5505024/cndat) << 24 (8.24 fixed point float)*/
425 p = intlog10(5505024) - intlog10(cndat);
426 p *= 10;
427
428 cn = 24772;
429 cn += div64_s64(43827LL * p, 10) >> 24;
430 tmp = p >> 8;
431 cn += div64_s64(3184LL * tmp * tmp, 10) >> 32;
432 tmp = p >> 13;
433 cn -= div64_s64(128LL * tmp * tmp * tmp, 10) >> 33;
434 tmp = p >> 18;
435 cn += div64_s64(192LL * tmp * tmp * tmp * tmp, 1000) >> 24;
436
437 stats->stat[0].svalue = cn >> 3;
438 stats->stat[0].scale = FE_SCALE_DECIBEL;
439 }
440
441 /* per-layer post viterbi BER (or PER? config dependent?) */
442 stats = &c->post_bit_error;
443 memset(stats, 0, sizeof(*stats));
444 stats->len = layers;
445 ret = reg_read(state, 0x9d, val, 15);
446 if (ret < 0)
447 for (i = 0; i < layers; i++)
448 stats->stat[i].scale = FE_SCALE_NOT_AVAILABLE;
449 else {
450 for (i = 0; i < layers; i++) {
451 stats->stat[i].scale = FE_SCALE_COUNTER;
452 stats->stat[i].uvalue = val[i * 3] << 16
453 | val[i * 3 + 1] << 8 | val[i * 3 + 2];
454 }
455 }
456 stats = &c->post_bit_count;
457 memset(stats, 0, sizeof(*stats));
458 stats->len = layers;
459 if (ret < 0)
460 for (i = 0; i < layers; i++)
461 stats->stat[i].scale = FE_SCALE_NOT_AVAILABLE;
462 else {
463 for (i = 0; i < layers; i++) {
464 stats->stat[i].scale = FE_SCALE_COUNTER;
465 stats->stat[i].uvalue =
466 val[9 + i * 2] << 8 | val[9 + i * 2 + 1];
467 stats->stat[i].uvalue *= 204 * 8;
468 }
469 }
470
471 return 0;
472 }
473
474 static const struct reg_val reset_sat = { 0x03, 0x01 };
475 static const struct reg_val reset_ter = { 0x01, 0x40 };
476
tc90522_set_frontend(struct dvb_frontend * fe)477 static int tc90522_set_frontend(struct dvb_frontend *fe)
478 {
479 struct tc90522_state *state;
480 int ret;
481
482 state = fe->demodulator_priv;
483
484 if (fe->ops.tuner_ops.set_params)
485 ret = fe->ops.tuner_ops.set_params(fe);
486 else
487 ret = -ENODEV;
488 if (ret < 0)
489 goto failed;
490
491 if (fe->ops.delsys[0] == SYS_ISDBS) {
492 ret = tc90522s_set_tsid(fe);
493 if (ret < 0)
494 goto failed;
495 ret = reg_write(state, &reset_sat, 1);
496 } else {
497 ret = tc90522t_set_layers(fe);
498 if (ret < 0)
499 goto failed;
500 ret = reg_write(state, &reset_ter, 1);
501 }
502 if (ret < 0)
503 goto failed;
504
505 return 0;
506
507 failed:
508 dev_warn(&state->tuner_i2c.dev, "(%s) failed. [adap%d-fe%d]\n",
509 __func__, fe->dvb->num, fe->id);
510 return ret;
511 }
512
tc90522_get_tune_settings(struct dvb_frontend * fe,struct dvb_frontend_tune_settings * settings)513 static int tc90522_get_tune_settings(struct dvb_frontend *fe,
514 struct dvb_frontend_tune_settings *settings)
515 {
516 if (fe->ops.delsys[0] == SYS_ISDBS) {
517 settings->min_delay_ms = 250;
518 settings->step_size = 1000;
519 settings->max_drift = settings->step_size * 2;
520 } else {
521 settings->min_delay_ms = 400;
522 settings->step_size = 142857;
523 settings->max_drift = settings->step_size;
524 }
525 return 0;
526 }
527
tc90522_set_if_agc(struct dvb_frontend * fe,bool on)528 static int tc90522_set_if_agc(struct dvb_frontend *fe, bool on)
529 {
530 struct reg_val agc_sat[] = {
531 { 0x0a, 0x00 },
532 { 0x10, 0x30 },
533 { 0x11, 0x00 },
534 { 0x03, 0x01 },
535 };
536 struct reg_val agc_ter[] = {
537 { 0x25, 0x00 },
538 { 0x23, 0x4c },
539 { 0x01, 0x40 },
540 };
541 struct tc90522_state *state;
542 struct reg_val *rv;
543 int num;
544
545 state = fe->demodulator_priv;
546 if (fe->ops.delsys[0] == SYS_ISDBS) {
547 agc_sat[0].val = on ? 0xff : 0x00;
548 agc_sat[1].val |= 0x80;
549 agc_sat[1].val |= on ? 0x01 : 0x00;
550 agc_sat[2].val |= on ? 0x40 : 0x00;
551 rv = agc_sat;
552 num = ARRAY_SIZE(agc_sat);
553 } else {
554 agc_ter[0].val = on ? 0x40 : 0x00;
555 agc_ter[1].val |= on ? 0x00 : 0x01;
556 rv = agc_ter;
557 num = ARRAY_SIZE(agc_ter);
558 }
559 return reg_write(state, rv, num);
560 }
561
562 static const struct reg_val sleep_sat = { 0x17, 0x01 };
563 static const struct reg_val sleep_ter = { 0x03, 0x90 };
564
tc90522_sleep(struct dvb_frontend * fe)565 static int tc90522_sleep(struct dvb_frontend *fe)
566 {
567 struct tc90522_state *state;
568 int ret;
569
570 state = fe->demodulator_priv;
571 if (fe->ops.delsys[0] == SYS_ISDBS)
572 ret = reg_write(state, &sleep_sat, 1);
573 else {
574 ret = reg_write(state, &sleep_ter, 1);
575 if (ret == 0 && fe->ops.set_lna &&
576 fe->dtv_property_cache.lna == LNA_AUTO) {
577 fe->dtv_property_cache.lna = 0;
578 ret = fe->ops.set_lna(fe);
579 fe->dtv_property_cache.lna = LNA_AUTO;
580 }
581 }
582 if (ret < 0)
583 dev_warn(&state->tuner_i2c.dev,
584 "(%s) failed. [adap%d-fe%d]\n",
585 __func__, fe->dvb->num, fe->id);
586 return ret;
587 }
588
589 static const struct reg_val wakeup_sat = { 0x17, 0x00 };
590 static const struct reg_val wakeup_ter = { 0x03, 0x80 };
591
tc90522_init(struct dvb_frontend * fe)592 static int tc90522_init(struct dvb_frontend *fe)
593 {
594 struct tc90522_state *state;
595 int ret;
596
597 /*
598 * Because the init sequence is not public,
599 * the parent device/driver should have init'ed the device before.
600 * just wake up the device here.
601 */
602
603 state = fe->demodulator_priv;
604 if (fe->ops.delsys[0] == SYS_ISDBS)
605 ret = reg_write(state, &wakeup_sat, 1);
606 else {
607 ret = reg_write(state, &wakeup_ter, 1);
608 if (ret == 0 && fe->ops.set_lna &&
609 fe->dtv_property_cache.lna == LNA_AUTO) {
610 fe->dtv_property_cache.lna = 1;
611 ret = fe->ops.set_lna(fe);
612 fe->dtv_property_cache.lna = LNA_AUTO;
613 }
614 }
615 if (ret < 0) {
616 dev_warn(&state->tuner_i2c.dev,
617 "(%s) failed. [adap%d-fe%d]\n",
618 __func__, fe->dvb->num, fe->id);
619 return ret;
620 }
621
622 /* prefer 'all-layers' to 'none' as a default */
623 if (fe->dtv_property_cache.isdbt_layer_enabled == 0)
624 fe->dtv_property_cache.isdbt_layer_enabled = 7;
625 return tc90522_set_if_agc(fe, true);
626 }
627
628
629 /*
630 * tuner I2C adapter functions
631 */
632
633 static int
tc90522_master_xfer(struct i2c_adapter * adap,struct i2c_msg * msgs,int num)634 tc90522_master_xfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
635 {
636 struct tc90522_state *state;
637 struct i2c_msg *new_msgs;
638 int i, j;
639 int ret, rd_num;
640 u8 wbuf[256];
641 u8 *p, *bufend;
642
643 if (num <= 0)
644 return -EINVAL;
645
646 rd_num = 0;
647 for (i = 0; i < num; i++)
648 if (msgs[i].flags & I2C_M_RD)
649 rd_num++;
650 new_msgs = kmalloc_array(num + rd_num, sizeof(*new_msgs), GFP_KERNEL);
651 if (!new_msgs)
652 return -ENOMEM;
653
654 state = i2c_get_adapdata(adap);
655 p = wbuf;
656 bufend = wbuf + sizeof(wbuf);
657 for (i = 0, j = 0; i < num; i++, j++) {
658 new_msgs[j].addr = state->i2c_client->addr;
659 new_msgs[j].flags = msgs[i].flags;
660
661 if (msgs[i].flags & I2C_M_RD) {
662 new_msgs[j].flags &= ~I2C_M_RD;
663 if (p + 2 > bufend)
664 break;
665 p[0] = TC90522_I2C_THRU_REG;
666 p[1] = msgs[i].addr << 1 | 0x01;
667 new_msgs[j].buf = p;
668 new_msgs[j].len = 2;
669 p += 2;
670 j++;
671 new_msgs[j].addr = state->i2c_client->addr;
672 new_msgs[j].flags = msgs[i].flags;
673 new_msgs[j].buf = msgs[i].buf;
674 new_msgs[j].len = msgs[i].len;
675 continue;
676 }
677
678 if (p + msgs[i].len + 2 > bufend)
679 break;
680 p[0] = TC90522_I2C_THRU_REG;
681 p[1] = msgs[i].addr << 1;
682 memcpy(p + 2, msgs[i].buf, msgs[i].len);
683 new_msgs[j].buf = p;
684 new_msgs[j].len = msgs[i].len + 2;
685 p += new_msgs[j].len;
686 }
687
688 if (i < num) {
689 ret = -ENOMEM;
690 } else if (!state->cfg.split_tuner_read_i2c || rd_num == 0) {
691 ret = i2c_transfer(state->i2c_client->adapter, new_msgs, j);
692 } else {
693 /*
694 * Split transactions at each I2C_M_RD message.
695 * Some of the parent device require this,
696 * such as Friio (see. dvb-usb-gl861).
697 */
698 int from, to;
699
700 ret = 0;
701 from = 0;
702 do {
703 int r;
704
705 to = from + 1;
706 while (to < j && !(new_msgs[to].flags & I2C_M_RD))
707 to++;
708 r = i2c_transfer(state->i2c_client->adapter,
709 &new_msgs[from], to - from);
710 ret = (r <= 0) ? r : ret + r;
711 from = to;
712 } while (from < j && ret > 0);
713 }
714
715 if (ret >= 0 && ret < j)
716 ret = -EIO;
717 kfree(new_msgs);
718 return (ret == j) ? num : ret;
719 }
720
tc90522_functionality(struct i2c_adapter * adap)721 static u32 tc90522_functionality(struct i2c_adapter *adap)
722 {
723 return I2C_FUNC_I2C;
724 }
725
726 static const struct i2c_algorithm tc90522_tuner_i2c_algo = {
727 .master_xfer = &tc90522_master_xfer,
728 .functionality = &tc90522_functionality,
729 };
730
731
732 /*
733 * I2C driver functions
734 */
735
736 static const struct dvb_frontend_ops tc90522_ops_sat = {
737 .delsys = { SYS_ISDBS },
738 .info = {
739 .name = "Toshiba TC90522 ISDB-S module",
740 .frequency_min_hz = 950 * MHz,
741 .frequency_max_hz = 2150 * MHz,
742 .caps = FE_CAN_INVERSION_AUTO | FE_CAN_FEC_AUTO |
743 FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO |
744 FE_CAN_GUARD_INTERVAL_AUTO | FE_CAN_HIERARCHY_AUTO,
745 },
746
747 .init = tc90522_init,
748 .sleep = tc90522_sleep,
749 .set_frontend = tc90522_set_frontend,
750 .get_tune_settings = tc90522_get_tune_settings,
751
752 .get_frontend = tc90522s_get_frontend,
753 .read_status = tc90522s_read_status,
754 };
755
756 static const struct dvb_frontend_ops tc90522_ops_ter = {
757 .delsys = { SYS_ISDBT },
758 .info = {
759 .name = "Toshiba TC90522 ISDB-T module",
760 .frequency_min_hz = 470 * MHz,
761 .frequency_max_hz = 770 * MHz,
762 .frequency_stepsize_hz = 142857,
763 .caps = FE_CAN_INVERSION_AUTO |
764 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
765 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
766 FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 |
767 FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO |
768 FE_CAN_GUARD_INTERVAL_AUTO | FE_CAN_RECOVER |
769 FE_CAN_HIERARCHY_AUTO,
770 },
771
772 .init = tc90522_init,
773 .sleep = tc90522_sleep,
774 .set_frontend = tc90522_set_frontend,
775 .get_tune_settings = tc90522_get_tune_settings,
776
777 .get_frontend = tc90522t_get_frontend,
778 .read_status = tc90522t_read_status,
779 };
780
781
tc90522_probe(struct i2c_client * client)782 static int tc90522_probe(struct i2c_client *client)
783 {
784 const struct i2c_device_id *id = i2c_client_get_device_id(client);
785 struct tc90522_state *state;
786 struct tc90522_config *cfg;
787 const struct dvb_frontend_ops *ops;
788 struct i2c_adapter *adap;
789 int ret;
790
791 state = kzalloc(sizeof(*state), GFP_KERNEL);
792 if (!state)
793 return -ENOMEM;
794 state->i2c_client = client;
795
796 cfg = client->dev.platform_data;
797 memcpy(&state->cfg, cfg, sizeof(state->cfg));
798 cfg->fe = state->cfg.fe = &state->fe;
799 ops = id->driver_data == 0 ? &tc90522_ops_sat : &tc90522_ops_ter;
800 memcpy(&state->fe.ops, ops, sizeof(*ops));
801 state->fe.demodulator_priv = state;
802
803 adap = &state->tuner_i2c;
804 adap->owner = THIS_MODULE;
805 adap->algo = &tc90522_tuner_i2c_algo;
806 adap->dev.parent = &client->dev;
807 strscpy(adap->name, "tc90522_sub", sizeof(adap->name));
808 i2c_set_adapdata(adap, state);
809 ret = i2c_add_adapter(adap);
810 if (ret < 0)
811 goto free_state;
812 cfg->tuner_i2c = state->cfg.tuner_i2c = adap;
813
814 i2c_set_clientdata(client, &state->cfg);
815 dev_info(&client->dev, "Toshiba TC90522 attached.\n");
816 return 0;
817 free_state:
818 kfree(state);
819 return ret;
820 }
821
tc90522_remove(struct i2c_client * client)822 static void tc90522_remove(struct i2c_client *client)
823 {
824 struct tc90522_state *state;
825
826 state = cfg_to_state(i2c_get_clientdata(client));
827 i2c_del_adapter(&state->tuner_i2c);
828 kfree(state);
829 }
830
831
832 static const struct i2c_device_id tc90522_id[] = {
833 { TC90522_I2C_DEV_SAT, 0 },
834 { TC90522_I2C_DEV_TER, 1 },
835 {}
836 };
837 MODULE_DEVICE_TABLE(i2c, tc90522_id);
838
839 static struct i2c_driver tc90522_driver = {
840 .driver = {
841 .name = "tc90522",
842 },
843 .probe = tc90522_probe,
844 .remove = tc90522_remove,
845 .id_table = tc90522_id,
846 };
847
848 module_i2c_driver(tc90522_driver);
849
850 MODULE_DESCRIPTION("Toshiba TC90522 frontend");
851 MODULE_AUTHOR("Akihiro TSUKADA");
852 MODULE_LICENSE("GPL");
853