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ee9b8c8c AP |
1 | /* |
2 | * HDIC HD29L2 DMB-TH demodulator driver | |
3 | * | |
4 | * Copyright (C) 2011 Metropolia University of Applied Sciences, Electria R&D | |
5 | * | |
6 | * Author: Antti Palosaari <crope@iki.fi> | |
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 | #include "hd29l2_priv.h" | |
24 | ||
ee9b8c8c AP |
25 | /* write multiple registers */ |
26 | static int hd29l2_wr_regs(struct hd29l2_priv *priv, u8 reg, u8 *val, int len) | |
27 | { | |
28 | int ret; | |
dab734ec | 29 | u8 buf[2 + len]; |
ee9b8c8c AP |
30 | struct i2c_msg msg[1] = { |
31 | { | |
32 | .addr = priv->cfg.i2c_addr, | |
33 | .flags = 0, | |
34 | .len = sizeof(buf), | |
35 | .buf = buf, | |
36 | } | |
37 | }; | |
38 | ||
39 | buf[0] = 0x00; | |
40 | buf[1] = reg; | |
41 | memcpy(&buf[2], val, len); | |
42 | ||
43 | ret = i2c_transfer(priv->i2c, msg, 1); | |
44 | if (ret == 1) { | |
45 | ret = 0; | |
46 | } else { | |
a44850df AP |
47 | dev_warn(&priv->i2c->dev, |
48 | "%s: i2c wr failed=%d reg=%02x len=%d\n", | |
49 | KBUILD_MODNAME, ret, reg, len); | |
ee9b8c8c AP |
50 | ret = -EREMOTEIO; |
51 | } | |
52 | ||
53 | return ret; | |
54 | } | |
55 | ||
56 | /* read multiple registers */ | |
57 | static int hd29l2_rd_regs(struct hd29l2_priv *priv, u8 reg, u8 *val, int len) | |
58 | { | |
59 | int ret; | |
60 | u8 buf[2] = { 0x00, reg }; | |
61 | struct i2c_msg msg[2] = { | |
62 | { | |
63 | .addr = priv->cfg.i2c_addr, | |
64 | .flags = 0, | |
65 | .len = 2, | |
66 | .buf = buf, | |
67 | }, { | |
68 | .addr = priv->cfg.i2c_addr, | |
69 | .flags = I2C_M_RD, | |
70 | .len = len, | |
71 | .buf = val, | |
72 | } | |
73 | }; | |
74 | ||
75 | ret = i2c_transfer(priv->i2c, msg, 2); | |
76 | if (ret == 2) { | |
77 | ret = 0; | |
78 | } else { | |
a44850df AP |
79 | dev_warn(&priv->i2c->dev, |
80 | "%s: i2c rd failed=%d reg=%02x len=%d\n", | |
81 | KBUILD_MODNAME, ret, reg, len); | |
ee9b8c8c AP |
82 | ret = -EREMOTEIO; |
83 | } | |
84 | ||
85 | return ret; | |
86 | } | |
87 | ||
88 | /* write single register */ | |
89 | static int hd29l2_wr_reg(struct hd29l2_priv *priv, u8 reg, u8 val) | |
90 | { | |
91 | return hd29l2_wr_regs(priv, reg, &val, 1); | |
92 | } | |
93 | ||
94 | /* read single register */ | |
95 | static int hd29l2_rd_reg(struct hd29l2_priv *priv, u8 reg, u8 *val) | |
96 | { | |
97 | return hd29l2_rd_regs(priv, reg, val, 1); | |
98 | } | |
99 | ||
100 | /* write single register with mask */ | |
101 | static int hd29l2_wr_reg_mask(struct hd29l2_priv *priv, u8 reg, u8 val, u8 mask) | |
102 | { | |
103 | int ret; | |
104 | u8 tmp; | |
105 | ||
106 | /* no need for read if whole reg is written */ | |
107 | if (mask != 0xff) { | |
108 | ret = hd29l2_rd_regs(priv, reg, &tmp, 1); | |
109 | if (ret) | |
110 | return ret; | |
111 | ||
112 | val &= mask; | |
113 | tmp &= ~mask; | |
114 | val |= tmp; | |
115 | } | |
116 | ||
117 | return hd29l2_wr_regs(priv, reg, &val, 1); | |
118 | } | |
119 | ||
120 | /* read single register with mask */ | |
121 | int hd29l2_rd_reg_mask(struct hd29l2_priv *priv, u8 reg, u8 *val, u8 mask) | |
122 | { | |
123 | int ret, i; | |
124 | u8 tmp; | |
125 | ||
126 | ret = hd29l2_rd_regs(priv, reg, &tmp, 1); | |
127 | if (ret) | |
128 | return ret; | |
129 | ||
130 | tmp &= mask; | |
131 | ||
132 | /* find position of the first bit */ | |
133 | for (i = 0; i < 8; i++) { | |
134 | if ((mask >> i) & 0x01) | |
135 | break; | |
136 | } | |
137 | *val = tmp >> i; | |
138 | ||
139 | return 0; | |
140 | } | |
141 | ||
142 | static int hd29l2_soft_reset(struct hd29l2_priv *priv) | |
143 | { | |
144 | int ret; | |
145 | u8 tmp; | |
146 | ||
147 | ret = hd29l2_rd_reg(priv, 0x26, &tmp); | |
148 | if (ret) | |
149 | goto err; | |
150 | ||
151 | ret = hd29l2_wr_reg(priv, 0x26, 0x0d); | |
152 | if (ret) | |
153 | goto err; | |
154 | ||
155 | usleep_range(10000, 20000); | |
156 | ||
157 | ret = hd29l2_wr_reg(priv, 0x26, tmp); | |
158 | if (ret) | |
159 | goto err; | |
160 | ||
161 | return 0; | |
162 | err: | |
a44850df | 163 | dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); |
ee9b8c8c AP |
164 | return ret; |
165 | } | |
166 | ||
167 | static int hd29l2_i2c_gate_ctrl(struct dvb_frontend *fe, int enable) | |
168 | { | |
169 | int ret, i; | |
170 | struct hd29l2_priv *priv = fe->demodulator_priv; | |
171 | u8 tmp; | |
172 | ||
a44850df | 173 | dev_dbg(&priv->i2c->dev, "%s: enable=%d\n", __func__, enable); |
ee9b8c8c AP |
174 | |
175 | /* set tuner address for demod */ | |
176 | if (!priv->tuner_i2c_addr_programmed && enable) { | |
177 | /* no need to set tuner address every time, once is enough */ | |
178 | ret = hd29l2_wr_reg(priv, 0x9d, priv->cfg.tuner_i2c_addr << 1); | |
179 | if (ret) | |
180 | goto err; | |
181 | ||
182 | priv->tuner_i2c_addr_programmed = true; | |
183 | } | |
184 | ||
185 | /* open / close gate */ | |
186 | ret = hd29l2_wr_reg(priv, 0x9f, enable); | |
187 | if (ret) | |
188 | goto err; | |
189 | ||
190 | /* wait demod ready */ | |
191 | for (i = 10; i; i--) { | |
192 | ret = hd29l2_rd_reg(priv, 0x9e, &tmp); | |
193 | if (ret) | |
194 | goto err; | |
195 | ||
196 | if (tmp == enable) | |
197 | break; | |
198 | ||
199 | usleep_range(5000, 10000); | |
200 | } | |
201 | ||
a44850df | 202 | dev_dbg(&priv->i2c->dev, "%s: loop=%d\n", __func__, i); |
ee9b8c8c AP |
203 | |
204 | return ret; | |
205 | err: | |
a44850df | 206 | dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); |
ee9b8c8c AP |
207 | return ret; |
208 | } | |
209 | ||
210 | static int hd29l2_read_status(struct dvb_frontend *fe, fe_status_t *status) | |
211 | { | |
212 | int ret; | |
213 | struct hd29l2_priv *priv = fe->demodulator_priv; | |
214 | u8 buf[2]; | |
215 | ||
216 | *status = 0; | |
217 | ||
218 | ret = hd29l2_rd_reg(priv, 0x05, &buf[0]); | |
219 | if (ret) | |
220 | goto err; | |
221 | ||
222 | if (buf[0] & 0x01) { | |
223 | /* full lock */ | |
224 | *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI | | |
225 | FE_HAS_SYNC | FE_HAS_LOCK; | |
226 | } else { | |
227 | ret = hd29l2_rd_reg(priv, 0x0d, &buf[1]); | |
228 | if (ret) | |
229 | goto err; | |
230 | ||
231 | if ((buf[1] & 0xfe) == 0x78) | |
232 | /* partial lock */ | |
233 | *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | | |
234 | FE_HAS_VITERBI | FE_HAS_SYNC; | |
235 | } | |
236 | ||
237 | priv->fe_status = *status; | |
238 | ||
239 | return 0; | |
240 | err: | |
a44850df | 241 | dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); |
ee9b8c8c AP |
242 | return ret; |
243 | } | |
244 | ||
245 | static int hd29l2_read_snr(struct dvb_frontend *fe, u16 *snr) | |
246 | { | |
247 | int ret; | |
248 | struct hd29l2_priv *priv = fe->demodulator_priv; | |
249 | u8 buf[2]; | |
250 | u16 tmp; | |
251 | ||
252 | if (!(priv->fe_status & FE_HAS_LOCK)) { | |
253 | *snr = 0; | |
254 | ret = 0; | |
255 | goto err; | |
256 | } | |
257 | ||
258 | ret = hd29l2_rd_regs(priv, 0x0b, buf, 2); | |
259 | if (ret) | |
260 | goto err; | |
261 | ||
262 | tmp = (buf[0] << 8) | buf[1]; | |
263 | ||
264 | /* report SNR in dB * 10 */ | |
265 | #define LOG10_20736_24 72422627 /* log10(20736) << 24 */ | |
266 | if (tmp) | |
267 | *snr = (LOG10_20736_24 - intlog10(tmp)) / ((1 << 24) / 100); | |
268 | else | |
269 | *snr = 0; | |
270 | ||
271 | return 0; | |
272 | err: | |
a44850df | 273 | dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); |
ee9b8c8c AP |
274 | return ret; |
275 | } | |
276 | ||
277 | static int hd29l2_read_signal_strength(struct dvb_frontend *fe, u16 *strength) | |
278 | { | |
279 | int ret; | |
280 | struct hd29l2_priv *priv = fe->demodulator_priv; | |
281 | u8 buf[2]; | |
282 | u16 tmp; | |
283 | ||
284 | *strength = 0; | |
285 | ||
286 | ret = hd29l2_rd_regs(priv, 0xd5, buf, 2); | |
287 | if (ret) | |
288 | goto err; | |
289 | ||
290 | tmp = buf[0] << 8 | buf[1]; | |
291 | tmp = ~tmp & 0x0fff; | |
292 | ||
293 | /* scale value to 0x0000-0xffff from 0x0000-0x0fff */ | |
294 | *strength = tmp * 0xffff / 0x0fff; | |
295 | ||
296 | return 0; | |
297 | err: | |
a44850df | 298 | dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); |
ee9b8c8c AP |
299 | return ret; |
300 | } | |
301 | ||
302 | static int hd29l2_read_ber(struct dvb_frontend *fe, u32 *ber) | |
303 | { | |
304 | int ret; | |
305 | struct hd29l2_priv *priv = fe->demodulator_priv; | |
306 | u8 buf[2]; | |
307 | ||
308 | if (!(priv->fe_status & FE_HAS_SYNC)) { | |
309 | *ber = 0; | |
310 | ret = 0; | |
311 | goto err; | |
312 | } | |
313 | ||
314 | ret = hd29l2_rd_regs(priv, 0xd9, buf, 2); | |
315 | if (ret) { | |
316 | *ber = 0; | |
317 | goto err; | |
318 | } | |
319 | ||
320 | /* LDPC BER */ | |
321 | *ber = ((buf[0] & 0x0f) << 8) | buf[1]; | |
322 | ||
323 | return 0; | |
324 | err: | |
a44850df | 325 | dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); |
ee9b8c8c AP |
326 | return ret; |
327 | } | |
328 | ||
329 | static int hd29l2_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) | |
330 | { | |
331 | /* no way to read? */ | |
332 | *ucblocks = 0; | |
333 | return 0; | |
334 | } | |
335 | ||
6964c308 | 336 | static enum dvbfe_search hd29l2_search(struct dvb_frontend *fe) |
ee9b8c8c AP |
337 | { |
338 | int ret, i; | |
339 | struct hd29l2_priv *priv = fe->demodulator_priv; | |
340 | struct dtv_frontend_properties *c = &fe->dtv_property_cache; | |
341 | u8 tmp, buf[3]; | |
342 | u8 modulation, carrier, guard_interval, interleave, code_rate; | |
343 | u64 num64; | |
344 | u32 if_freq, if_ctl; | |
345 | bool auto_mode; | |
346 | ||
a44850df AP |
347 | dev_dbg(&priv->i2c->dev, "%s: delivery_system=%d frequency=%d " \ |
348 | "bandwidth_hz=%d modulation=%d inversion=%d " \ | |
349 | "fec_inner=%d guard_interval=%d\n", __func__, | |
350 | c->delivery_system, c->frequency, c->bandwidth_hz, | |
351 | c->modulation, c->inversion, c->fec_inner, | |
352 | c->guard_interval); | |
ee9b8c8c AP |
353 | |
354 | /* as for now we detect always params automatically */ | |
355 | auto_mode = true; | |
356 | ||
357 | /* program tuner */ | |
358 | if (fe->ops.tuner_ops.set_params) | |
6964c308 | 359 | fe->ops.tuner_ops.set_params(fe); |
ee9b8c8c AP |
360 | |
361 | /* get and program IF */ | |
362 | if (fe->ops.tuner_ops.get_if_frequency) | |
363 | fe->ops.tuner_ops.get_if_frequency(fe, &if_freq); | |
364 | else | |
365 | if_freq = 0; | |
366 | ||
367 | if (if_freq) { | |
368 | /* normal IF */ | |
369 | ||
370 | /* calc IF control value */ | |
371 | num64 = if_freq; | |
372 | num64 *= 0x800000; | |
373 | num64 = div_u64(num64, HD29L2_XTAL); | |
374 | num64 -= 0x800000; | |
375 | if_ctl = num64; | |
376 | ||
377 | tmp = 0xfc; /* tuner type normal */ | |
378 | } else { | |
379 | /* zero IF */ | |
380 | if_ctl = 0; | |
381 | tmp = 0xfe; /* tuner type Zero-IF */ | |
382 | } | |
383 | ||
384 | buf[0] = ((if_ctl >> 0) & 0xff); | |
385 | buf[1] = ((if_ctl >> 8) & 0xff); | |
386 | buf[2] = ((if_ctl >> 16) & 0xff); | |
387 | ||
388 | /* program IF control */ | |
389 | ret = hd29l2_wr_regs(priv, 0x14, buf, 3); | |
390 | if (ret) | |
391 | goto err; | |
392 | ||
393 | /* program tuner type */ | |
394 | ret = hd29l2_wr_reg(priv, 0xab, tmp); | |
395 | if (ret) | |
396 | goto err; | |
397 | ||
a44850df AP |
398 | dev_dbg(&priv->i2c->dev, "%s: if_freq=%d if_ctl=%x\n", |
399 | __func__, if_freq, if_ctl); | |
ee9b8c8c AP |
400 | |
401 | if (auto_mode) { | |
402 | /* | |
403 | * use auto mode | |
404 | */ | |
405 | ||
406 | /* disable quick mode */ | |
407 | ret = hd29l2_wr_reg_mask(priv, 0xac, 0 << 7, 0x80); | |
408 | if (ret) | |
409 | goto err; | |
410 | ||
411 | ret = hd29l2_wr_reg_mask(priv, 0x82, 1 << 1, 0x02); | |
412 | if (ret) | |
413 | goto err; | |
414 | ||
415 | /* enable auto mode */ | |
416 | ret = hd29l2_wr_reg_mask(priv, 0x7d, 1 << 6, 0x40); | |
417 | if (ret) | |
418 | goto err; | |
419 | ||
420 | ret = hd29l2_wr_reg_mask(priv, 0x81, 1 << 3, 0x08); | |
421 | if (ret) | |
422 | goto err; | |
423 | ||
424 | /* soft reset */ | |
425 | ret = hd29l2_soft_reset(priv); | |
426 | if (ret) | |
427 | goto err; | |
428 | ||
429 | /* detect modulation */ | |
430 | for (i = 30; i; i--) { | |
431 | msleep(100); | |
432 | ||
433 | ret = hd29l2_rd_reg(priv, 0x0d, &tmp); | |
434 | if (ret) | |
435 | goto err; | |
436 | ||
437 | if ((((tmp & 0xf0) >= 0x10) && | |
438 | ((tmp & 0x0f) == 0x08)) || (tmp >= 0x2c)) | |
439 | break; | |
440 | } | |
441 | ||
a44850df | 442 | dev_dbg(&priv->i2c->dev, "%s: loop=%d\n", __func__, i); |
ee9b8c8c AP |
443 | |
444 | if (i == 0) | |
445 | /* detection failed */ | |
446 | return DVBFE_ALGO_SEARCH_FAILED; | |
447 | ||
448 | /* read modulation */ | |
449 | ret = hd29l2_rd_reg_mask(priv, 0x7d, &modulation, 0x07); | |
450 | if (ret) | |
451 | goto err; | |
452 | } else { | |
453 | /* | |
454 | * use manual mode | |
455 | */ | |
456 | ||
457 | modulation = HD29L2_QAM64; | |
458 | carrier = HD29L2_CARRIER_MULTI; | |
459 | guard_interval = HD29L2_PN945; | |
460 | interleave = HD29L2_INTERLEAVER_420; | |
461 | code_rate = HD29L2_CODE_RATE_08; | |
462 | ||
463 | tmp = (code_rate << 3) | modulation; | |
464 | ret = hd29l2_wr_reg_mask(priv, 0x7d, tmp, 0x5f); | |
465 | if (ret) | |
466 | goto err; | |
467 | ||
468 | tmp = (carrier << 2) | guard_interval; | |
469 | ret = hd29l2_wr_reg_mask(priv, 0x81, tmp, 0x0f); | |
470 | if (ret) | |
471 | goto err; | |
472 | ||
473 | tmp = interleave; | |
474 | ret = hd29l2_wr_reg_mask(priv, 0x82, tmp, 0x03); | |
475 | if (ret) | |
476 | goto err; | |
477 | } | |
478 | ||
479 | /* ensure modulation validy */ | |
480 | /* 0=QAM4_NR, 1=QAM4, 2=QAM16, 3=QAM32, 4=QAM64 */ | |
dab734ec | 481 | if (modulation > (ARRAY_SIZE(reg_mod_vals_tab[0].val) - 1)) { |
a44850df AP |
482 | dev_dbg(&priv->i2c->dev, "%s: modulation=%d not valid\n", |
483 | __func__, modulation); | |
ee9b8c8c AP |
484 | goto err; |
485 | } | |
486 | ||
487 | /* program registers according to modulation */ | |
488 | for (i = 0; i < ARRAY_SIZE(reg_mod_vals_tab); i++) { | |
489 | ret = hd29l2_wr_reg(priv, reg_mod_vals_tab[i].reg, | |
490 | reg_mod_vals_tab[i].val[modulation]); | |
491 | if (ret) | |
492 | goto err; | |
493 | } | |
494 | ||
495 | /* read guard interval */ | |
496 | ret = hd29l2_rd_reg_mask(priv, 0x81, &guard_interval, 0x03); | |
497 | if (ret) | |
498 | goto err; | |
499 | ||
500 | /* read carrier mode */ | |
501 | ret = hd29l2_rd_reg_mask(priv, 0x81, &carrier, 0x04); | |
502 | if (ret) | |
503 | goto err; | |
504 | ||
a44850df AP |
505 | dev_dbg(&priv->i2c->dev, |
506 | "%s: modulation=%d guard_interval=%d carrier=%d\n", | |
507 | __func__, modulation, guard_interval, carrier); | |
ee9b8c8c AP |
508 | |
509 | if ((carrier == HD29L2_CARRIER_MULTI) && (modulation == HD29L2_QAM64) && | |
510 | (guard_interval == HD29L2_PN945)) { | |
a44850df AP |
511 | dev_dbg(&priv->i2c->dev, "%s: C=3780 && QAM64 && PN945\n", |
512 | __func__); | |
ee9b8c8c AP |
513 | |
514 | ret = hd29l2_wr_reg(priv, 0x42, 0x33); | |
515 | if (ret) | |
516 | goto err; | |
517 | ||
518 | ret = hd29l2_wr_reg(priv, 0xdd, 0x01); | |
519 | if (ret) | |
520 | goto err; | |
521 | } | |
522 | ||
523 | usleep_range(10000, 20000); | |
524 | ||
525 | /* soft reset */ | |
526 | ret = hd29l2_soft_reset(priv); | |
527 | if (ret) | |
528 | goto err; | |
529 | ||
530 | /* wait demod lock */ | |
531 | for (i = 30; i; i--) { | |
532 | msleep(100); | |
533 | ||
534 | /* read lock bit */ | |
535 | ret = hd29l2_rd_reg_mask(priv, 0x05, &tmp, 0x01); | |
536 | if (ret) | |
537 | goto err; | |
538 | ||
539 | if (tmp) | |
540 | break; | |
541 | } | |
542 | ||
a44850df | 543 | dev_dbg(&priv->i2c->dev, "%s: loop=%d\n", __func__, i); |
ee9b8c8c AP |
544 | |
545 | if (i == 0) | |
546 | return DVBFE_ALGO_SEARCH_AGAIN; | |
547 | ||
548 | return DVBFE_ALGO_SEARCH_SUCCESS; | |
549 | err: | |
a44850df | 550 | dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); |
ee9b8c8c AP |
551 | return DVBFE_ALGO_SEARCH_ERROR; |
552 | } | |
553 | ||
554 | static int hd29l2_get_frontend_algo(struct dvb_frontend *fe) | |
555 | { | |
556 | return DVBFE_ALGO_CUSTOM; | |
557 | } | |
558 | ||
6964c308 | 559 | static int hd29l2_get_frontend(struct dvb_frontend *fe) |
ee9b8c8c AP |
560 | { |
561 | int ret; | |
562 | struct hd29l2_priv *priv = fe->demodulator_priv; | |
563 | struct dtv_frontend_properties *c = &fe->dtv_property_cache; | |
564 | u8 buf[3]; | |
565 | u32 if_ctl; | |
566 | char *str_constellation, *str_code_rate, *str_constellation_code_rate, | |
567 | *str_guard_interval, *str_carrier, *str_guard_interval_carrier, | |
568 | *str_interleave, *str_interleave_; | |
569 | ||
570 | ret = hd29l2_rd_reg(priv, 0x7d, &buf[0]); | |
571 | if (ret) | |
572 | goto err; | |
573 | ||
574 | ret = hd29l2_rd_regs(priv, 0x81, &buf[1], 2); | |
575 | if (ret) | |
576 | goto err; | |
577 | ||
578 | /* constellation, 0x7d[2:0] */ | |
579 | switch ((buf[0] >> 0) & 0x07) { | |
580 | case 0: /* QAM4NR */ | |
581 | str_constellation = "QAM4NR"; | |
582 | c->modulation = QAM_AUTO; /* FIXME */ | |
583 | break; | |
584 | case 1: /* QAM4 */ | |
585 | str_constellation = "QAM4"; | |
586 | c->modulation = QPSK; /* FIXME */ | |
587 | break; | |
588 | case 2: | |
589 | str_constellation = "QAM16"; | |
590 | c->modulation = QAM_16; | |
591 | break; | |
592 | case 3: | |
593 | str_constellation = "QAM32"; | |
594 | c->modulation = QAM_32; | |
595 | break; | |
596 | case 4: | |
597 | str_constellation = "QAM64"; | |
598 | c->modulation = QAM_64; | |
599 | break; | |
600 | default: | |
601 | str_constellation = "?"; | |
602 | } | |
603 | ||
604 | /* LDPC code rate, 0x7d[4:3] */ | |
605 | switch ((buf[0] >> 3) & 0x03) { | |
606 | case 0: /* 0.4 */ | |
607 | str_code_rate = "0.4"; | |
608 | c->fec_inner = FEC_AUTO; /* FIXME */ | |
609 | break; | |
610 | case 1: /* 0.6 */ | |
611 | str_code_rate = "0.6"; | |
612 | c->fec_inner = FEC_3_5; | |
613 | break; | |
614 | case 2: /* 0.8 */ | |
615 | str_code_rate = "0.8"; | |
616 | c->fec_inner = FEC_4_5; | |
617 | break; | |
618 | default: | |
619 | str_code_rate = "?"; | |
620 | } | |
621 | ||
622 | /* constellation & code rate set, 0x7d[6] */ | |
623 | switch ((buf[0] >> 6) & 0x01) { | |
624 | case 0: | |
625 | str_constellation_code_rate = "manual"; | |
626 | break; | |
627 | case 1: | |
628 | str_constellation_code_rate = "auto"; | |
629 | break; | |
630 | default: | |
631 | str_constellation_code_rate = "?"; | |
632 | } | |
633 | ||
634 | /* frame header, 0x81[1:0] */ | |
635 | switch ((buf[1] >> 0) & 0x03) { | |
636 | case 0: /* PN945 */ | |
637 | str_guard_interval = "PN945"; | |
638 | c->guard_interval = GUARD_INTERVAL_AUTO; /* FIXME */ | |
639 | break; | |
640 | case 1: /* PN595 */ | |
641 | str_guard_interval = "PN595"; | |
642 | c->guard_interval = GUARD_INTERVAL_AUTO; /* FIXME */ | |
643 | break; | |
644 | case 2: /* PN420 */ | |
645 | str_guard_interval = "PN420"; | |
646 | c->guard_interval = GUARD_INTERVAL_AUTO; /* FIXME */ | |
647 | break; | |
648 | default: | |
649 | str_guard_interval = "?"; | |
650 | } | |
651 | ||
652 | /* carrier, 0x81[2] */ | |
653 | switch ((buf[1] >> 2) & 0x01) { | |
654 | case 0: | |
655 | str_carrier = "C=1"; | |
656 | break; | |
657 | case 1: | |
658 | str_carrier = "C=3780"; | |
659 | break; | |
660 | default: | |
661 | str_carrier = "?"; | |
662 | } | |
663 | ||
664 | /* frame header & carrier set, 0x81[3] */ | |
665 | switch ((buf[1] >> 3) & 0x01) { | |
666 | case 0: | |
667 | str_guard_interval_carrier = "manual"; | |
668 | break; | |
669 | case 1: | |
670 | str_guard_interval_carrier = "auto"; | |
671 | break; | |
672 | default: | |
673 | str_guard_interval_carrier = "?"; | |
674 | } | |
675 | ||
676 | /* interleave, 0x82[0] */ | |
677 | switch ((buf[2] >> 0) & 0x01) { | |
678 | case 0: | |
679 | str_interleave = "M=720"; | |
680 | break; | |
681 | case 1: | |
682 | str_interleave = "M=240"; | |
683 | break; | |
684 | default: | |
685 | str_interleave = "?"; | |
686 | } | |
687 | ||
688 | /* interleave set, 0x82[1] */ | |
689 | switch ((buf[2] >> 1) & 0x01) { | |
690 | case 0: | |
691 | str_interleave_ = "manual"; | |
692 | break; | |
693 | case 1: | |
694 | str_interleave_ = "auto"; | |
695 | break; | |
696 | default: | |
697 | str_interleave_ = "?"; | |
698 | } | |
699 | ||
700 | /* | |
701 | * We can read out current detected NCO and use that value next | |
702 | * time instead of calculating new value from targed IF. | |
703 | * I think it will not effect receiver sensitivity but gaining lock | |
704 | * after tune could be easier... | |
705 | */ | |
706 | ret = hd29l2_rd_regs(priv, 0xb1, &buf[0], 3); | |
707 | if (ret) | |
708 | goto err; | |
709 | ||
710 | if_ctl = (buf[0] << 16) | ((buf[1] - 7) << 8) | buf[2]; | |
711 | ||
a44850df AP |
712 | dev_dbg(&priv->i2c->dev, "%s: %s %s %s | %s %s %s | %s %s | NCO=%06x\n", |
713 | __func__, str_constellation, str_code_rate, | |
714 | str_constellation_code_rate, str_guard_interval, | |
715 | str_carrier, str_guard_interval_carrier, str_interleave, | |
716 | str_interleave_, if_ctl); | |
ee9b8c8c AP |
717 | return 0; |
718 | err: | |
a44850df | 719 | dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); |
ee9b8c8c AP |
720 | return ret; |
721 | } | |
722 | ||
723 | static int hd29l2_init(struct dvb_frontend *fe) | |
724 | { | |
725 | int ret, i; | |
726 | struct hd29l2_priv *priv = fe->demodulator_priv; | |
727 | u8 tmp; | |
728 | static const struct reg_val tab[] = { | |
729 | { 0x3a, 0x06 }, | |
730 | { 0x3b, 0x03 }, | |
731 | { 0x3c, 0x04 }, | |
732 | { 0xaf, 0x06 }, | |
733 | { 0xb0, 0x1b }, | |
734 | { 0x80, 0x64 }, | |
735 | { 0x10, 0x38 }, | |
736 | }; | |
737 | ||
a44850df | 738 | dev_dbg(&priv->i2c->dev, "%s:\n", __func__); |
ee9b8c8c AP |
739 | |
740 | /* reset demod */ | |
741 | /* it is recommended to HW reset chip using RST_N pin */ | |
742 | if (fe->callback) { | |
dab734ec | 743 | ret = fe->callback(fe, DVB_FRONTEND_COMPONENT_DEMOD, 0, 0); |
ee9b8c8c AP |
744 | if (ret) |
745 | goto err; | |
746 | ||
747 | /* reprogramming needed because HW reset clears registers */ | |
748 | priv->tuner_i2c_addr_programmed = false; | |
749 | } | |
750 | ||
751 | /* init */ | |
752 | for (i = 0; i < ARRAY_SIZE(tab); i++) { | |
753 | ret = hd29l2_wr_reg(priv, tab[i].reg, tab[i].val); | |
754 | if (ret) | |
755 | goto err; | |
756 | } | |
757 | ||
758 | /* TS params */ | |
759 | ret = hd29l2_rd_reg(priv, 0x36, &tmp); | |
760 | if (ret) | |
761 | goto err; | |
762 | ||
763 | tmp &= 0x1b; | |
764 | tmp |= priv->cfg.ts_mode; | |
765 | ret = hd29l2_wr_reg(priv, 0x36, tmp); | |
766 | if (ret) | |
767 | goto err; | |
768 | ||
769 | ret = hd29l2_rd_reg(priv, 0x31, &tmp); | |
770 | tmp &= 0xef; | |
771 | ||
772 | if (!(priv->cfg.ts_mode >> 7)) | |
773 | /* set b4 for serial TS */ | |
774 | tmp |= 0x10; | |
775 | ||
776 | ret = hd29l2_wr_reg(priv, 0x31, tmp); | |
777 | if (ret) | |
778 | goto err; | |
779 | ||
780 | return ret; | |
781 | err: | |
a44850df | 782 | dev_dbg(&priv->i2c->dev, "%s: failed=%d\n", __func__, ret); |
ee9b8c8c AP |
783 | return ret; |
784 | } | |
785 | ||
786 | static void hd29l2_release(struct dvb_frontend *fe) | |
787 | { | |
788 | struct hd29l2_priv *priv = fe->demodulator_priv; | |
789 | kfree(priv); | |
790 | } | |
791 | ||
792 | static struct dvb_frontend_ops hd29l2_ops; | |
793 | ||
794 | struct dvb_frontend *hd29l2_attach(const struct hd29l2_config *config, | |
795 | struct i2c_adapter *i2c) | |
796 | { | |
797 | int ret; | |
798 | struct hd29l2_priv *priv = NULL; | |
799 | u8 tmp; | |
800 | ||
801 | /* allocate memory for the internal state */ | |
802 | priv = kzalloc(sizeof(struct hd29l2_priv), GFP_KERNEL); | |
803 | if (priv == NULL) | |
804 | goto err; | |
805 | ||
806 | /* setup the state */ | |
807 | priv->i2c = i2c; | |
808 | memcpy(&priv->cfg, config, sizeof(struct hd29l2_config)); | |
809 | ||
810 | ||
811 | /* check if the demod is there */ | |
812 | ret = hd29l2_rd_reg(priv, 0x00, &tmp); | |
813 | if (ret) | |
814 | goto err; | |
815 | ||
816 | /* create dvb_frontend */ | |
817 | memcpy(&priv->fe.ops, &hd29l2_ops, sizeof(struct dvb_frontend_ops)); | |
818 | priv->fe.demodulator_priv = priv; | |
819 | ||
820 | return &priv->fe; | |
821 | err: | |
822 | kfree(priv); | |
823 | return NULL; | |
824 | } | |
825 | EXPORT_SYMBOL(hd29l2_attach); | |
826 | ||
827 | static struct dvb_frontend_ops hd29l2_ops = { | |
6964c308 | 828 | .delsys = { SYS_DVBT }, |
ee9b8c8c AP |
829 | .info = { |
830 | .name = "HDIC HD29L2 DMB-TH", | |
ee9b8c8c AP |
831 | .frequency_min = 474000000, |
832 | .frequency_max = 858000000, | |
833 | .frequency_stepsize = 10000, | |
834 | .caps = FE_CAN_FEC_AUTO | | |
835 | FE_CAN_QPSK | | |
836 | FE_CAN_QAM_16 | | |
837 | FE_CAN_QAM_32 | | |
838 | FE_CAN_QAM_64 | | |
839 | FE_CAN_QAM_AUTO | | |
840 | FE_CAN_TRANSMISSION_MODE_AUTO | | |
841 | FE_CAN_BANDWIDTH_AUTO | | |
842 | FE_CAN_GUARD_INTERVAL_AUTO | | |
843 | FE_CAN_HIERARCHY_AUTO | | |
844 | FE_CAN_RECOVER | |
845 | }, | |
846 | ||
847 | .release = hd29l2_release, | |
848 | ||
849 | .init = hd29l2_init, | |
850 | ||
851 | .get_frontend_algo = hd29l2_get_frontend_algo, | |
852 | .search = hd29l2_search, | |
853 | .get_frontend = hd29l2_get_frontend, | |
854 | ||
855 | .read_status = hd29l2_read_status, | |
856 | .read_snr = hd29l2_read_snr, | |
857 | .read_signal_strength = hd29l2_read_signal_strength, | |
858 | .read_ber = hd29l2_read_ber, | |
859 | .read_ucblocks = hd29l2_read_ucblocks, | |
860 | ||
861 | .i2c_gate_ctrl = hd29l2_i2c_gate_ctrl, | |
862 | }; | |
863 | ||
864 | MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); | |
865 | MODULE_DESCRIPTION("HDIC HD29L2 DMB-TH demodulator driver"); | |
866 | MODULE_LICENSE("GPL"); |