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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
[linux/fpc-iii.git] / drivers / media / dvb-frontends / nxt200x.c
blob8a8e1ecb762d8abe8e6ab7b8478b2ec65f3577f9
1 /*
2 * Support for NXT2002 and NXT2004 - VSB/QAM
3 *
4 * Copyright (C) 2005 Kirk Lapray <kirk.lapray@gmail.com>
5 * Copyright (C) 2006-2014 Michael Krufky <mkrufky@linuxtv.org>
6 * based on nxt2002 by Taylor Jacob <rtjacob@earthlink.net>
7 * and nxt2004 by Jean-Francois Thibert <jeanfrancois@sagetv.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 *
23 */
24
25 /*
26 * NOTES ABOUT THIS DRIVER
27 *
28 * This Linux driver supports:
29 * B2C2/BBTI Technisat Air2PC - ATSC (NXT2002)
30 * AverTVHD MCE A180 (NXT2004)
31 * ATI HDTV Wonder (NXT2004)
32 *
33 * This driver needs external firmware. Please use the command
34 * "<kerneldir>/Documentation/dvb/get_dvb_firmware nxt2002" or
35 * "<kerneldir>/Documentation/dvb/get_dvb_firmware nxt2004" to
36 * download/extract the appropriate firmware, and then copy it to
37 * /usr/lib/hotplug/firmware/ or /lib/firmware/
38 * (depending on configuration of firmware hotplug).
39 */
40 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
41
42 /* Max transfer size done by I2C transfer functions */
43 #define MAX_XFER_SIZE 256
44
45 #define NXT2002_DEFAULT_FIRMWARE "dvb-fe-nxt2002.fw"
46 #define NXT2004_DEFAULT_FIRMWARE "dvb-fe-nxt2004.fw"
47 #define CRC_CCIT_MASK 0x1021
48
49 #include <linux/kernel.h>
50 #include <linux/init.h>
51 #include <linux/module.h>
52 #include <linux/slab.h>
53 #include <linux/string.h>
54
55 #include "dvb_frontend.h"
56 #include "nxt200x.h"
57
58 struct nxt200x_state {
59
60 struct i2c_adapter* i2c;
61 const struct nxt200x_config* config;
62 struct dvb_frontend frontend;
63
64 /* demodulator private data */
65 nxt_chip_type demod_chip;
66 u8 initialised:1;
67 };
68
69 static int debug;
70 #define dprintk(args...) do { if (debug) pr_debug(args); } while (0)
71
72 static int i2c_writebytes (struct nxt200x_state* state, u8 addr, u8 *buf, u8 len)
73 {
74 int err;
75 struct i2c_msg msg = { .addr = addr, .flags = 0, .buf = buf, .len = len };
76
77 if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
78 pr_warn("%s: i2c write error (addr 0x%02x, err == %i)\n",
79 __func__, addr, err);
80 return -EREMOTEIO;
81 }
82 return 0;
83 }
84
85 static int i2c_readbytes(struct nxt200x_state *state, u8 addr, u8 *buf, u8 len)
86 {
87 int err;
88 struct i2c_msg msg = { .addr = addr, .flags = I2C_M_RD, .buf = buf, .len = len };
89
90 if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
91 pr_warn("%s: i2c read error (addr 0x%02x, err == %i)\n",
92 __func__, addr, err);
93 return -EREMOTEIO;
94 }
95 return 0;
96 }
97
98 static int nxt200x_writebytes (struct nxt200x_state* state, u8 reg,
99 const u8 *buf, u8 len)
100 {
101 u8 buf2[MAX_XFER_SIZE];
102 int err;
103 struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf2, .len = len + 1 };
104
105 if (1 + len > sizeof(buf2)) {
106 pr_warn("%s: i2c wr reg=%04x: len=%d is too big!\n",
107 __func__, reg, len);
108 return -EINVAL;
109 }
110
111 buf2[0] = reg;
112 memcpy(&buf2[1], buf, len);
113
114 if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
115 pr_warn("%s: i2c write error (addr 0x%02x, err == %i)\n",
116 __func__, state->config->demod_address, err);
117 return -EREMOTEIO;
118 }
119 return 0;
120 }
121
122 static int nxt200x_readbytes(struct nxt200x_state *state, u8 reg, u8 *buf, u8 len)
123 {
124 u8 reg2 [] = { reg };
125
126 struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = reg2, .len = 1 },
127 { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = buf, .len = len } };
128
129 int err;
130
131 if ((err = i2c_transfer (state->i2c, msg, 2)) != 2) {
132 pr_warn("%s: i2c read error (addr 0x%02x, err == %i)\n",
133 __func__, state->config->demod_address, err);
134 return -EREMOTEIO;
135 }
136 return 0;
137 }
138
139 static u16 nxt200x_crc(u16 crc, u8 c)
140 {
141 u8 i;
142 u16 input = (u16) c & 0xFF;
143
144 input<<=8;
145 for(i=0; i<8; i++) {
146 if((crc^input) & 0x8000)
147 crc=(crc<<1)^CRC_CCIT_MASK;
148 else
149 crc<<=1;
150 input<<=1;
151 }
152 return crc;
153 }
154
155 static int nxt200x_writereg_multibyte (struct nxt200x_state* state, u8 reg, u8* data, u8 len)
156 {
157 u8 attr, len2, buf;
158 dprintk("%s\n", __func__);
159
160 /* set mutli register register */
161 nxt200x_writebytes(state, 0x35, &reg, 1);
162
163 /* send the actual data */
164 nxt200x_writebytes(state, 0x36, data, len);
165
166 switch (state->demod_chip) {
167 case NXT2002:
168 len2 = len;
169 buf = 0x02;
170 break;
171 case NXT2004:
172 /* probably not right, but gives correct values */
173 attr = 0x02;
174 if (reg & 0x80) {
175 attr = attr << 1;
176 if (reg & 0x04)
177 attr = attr >> 1;
178 }
179 /* set write bit */
180 len2 = ((attr << 4) | 0x10) | len;
181 buf = 0x80;
182 break;
183 default:
184 return -EINVAL;
185 break;
186 }
187
188 /* set multi register length */
189 nxt200x_writebytes(state, 0x34, &len2, 1);
190
191 /* toggle the multireg write bit */
192 nxt200x_writebytes(state, 0x21, &buf, 1);
193
194 nxt200x_readbytes(state, 0x21, &buf, 1);
195
196 switch (state->demod_chip) {
197 case NXT2002:
198 if ((buf & 0x02) == 0)
199 return 0;
200 break;
201 case NXT2004:
202 if (buf == 0)
203 return 0;
204 break;
205 default:
206 return -EINVAL;
207 break;
208 }
209
210 pr_warn("Error writing multireg register 0x%02X\n", reg);
211
212 return 0;
213 }
214
215 static int nxt200x_readreg_multibyte (struct nxt200x_state* state, u8 reg, u8* data, u8 len)
216 {
217 int i;
218 u8 buf, len2, attr;
219 dprintk("%s\n", __func__);
220
221 /* set mutli register register */
222 nxt200x_writebytes(state, 0x35, &reg, 1);
223
224 switch (state->demod_chip) {
225 case NXT2002:
226 /* set multi register length */
227 len2 = len & 0x80;
228 nxt200x_writebytes(state, 0x34, &len2, 1);
229
230 /* read the actual data */
231 nxt200x_readbytes(state, reg, data, len);
232 return 0;
233 break;
234 case NXT2004:
235 /* probably not right, but gives correct values */
236 attr = 0x02;
237 if (reg & 0x80) {
238 attr = attr << 1;
239 if (reg & 0x04)
240 attr = attr >> 1;
241 }
242
243 /* set multi register length */
244 len2 = (attr << 4) | len;
245 nxt200x_writebytes(state, 0x34, &len2, 1);
246
247 /* toggle the multireg bit*/
248 buf = 0x80;
249 nxt200x_writebytes(state, 0x21, &buf, 1);
250
251 /* read the actual data */
252 for(i = 0; i < len; i++) {
253 nxt200x_readbytes(state, 0x36 + i, &data[i], 1);
254 }
255 return 0;
256 break;
257 default:
258 return -EINVAL;
259 break;
260 }
261 }
262
263 static void nxt200x_microcontroller_stop (struct nxt200x_state* state)
264 {
265 u8 buf, stopval, counter = 0;
266 dprintk("%s\n", __func__);
267
268 /* set correct stop value */
269 switch (state->demod_chip) {
270 case NXT2002:
271 stopval = 0x40;
272 break;
273 case NXT2004:
274 stopval = 0x10;
275 break;
276 default:
277 stopval = 0;
278 break;
279 }
280
281 buf = 0x80;
282 nxt200x_writebytes(state, 0x22, &buf, 1);
283
284 while (counter < 20) {
285 nxt200x_readbytes(state, 0x31, &buf, 1);
286 if (buf & stopval)
287 return;
288 msleep(10);
289 counter++;
290 }
291
292 pr_warn("Timeout waiting for nxt200x to stop. This is ok after "
293 "firmware upload.\n");
294 return;
295 }
296
297 static void nxt200x_microcontroller_start (struct nxt200x_state* state)
298 {
299 u8 buf;
300 dprintk("%s\n", __func__);
301
302 buf = 0x00;
303 nxt200x_writebytes(state, 0x22, &buf, 1);
304 }
305
306 static void nxt2004_microcontroller_init (struct nxt200x_state* state)
307 {
308 u8 buf[9];
309 u8 counter = 0;
310 dprintk("%s\n", __func__);
311
312 buf[0] = 0x00;
313 nxt200x_writebytes(state, 0x2b, buf, 1);
314 buf[0] = 0x70;
315 nxt200x_writebytes(state, 0x34, buf, 1);
316 buf[0] = 0x04;
317 nxt200x_writebytes(state, 0x35, buf, 1);
318 buf[0] = 0x01; buf[1] = 0x23; buf[2] = 0x45; buf[3] = 0x67; buf[4] = 0x89;
319 buf[5] = 0xAB; buf[6] = 0xCD; buf[7] = 0xEF; buf[8] = 0xC0;
320 nxt200x_writebytes(state, 0x36, buf, 9);
321 buf[0] = 0x80;
322 nxt200x_writebytes(state, 0x21, buf, 1);
323
324 while (counter < 20) {
325 nxt200x_readbytes(state, 0x21, buf, 1);
326 if (buf[0] == 0)
327 return;
328 msleep(10);
329 counter++;
330 }
331
332 pr_warn("Timeout waiting for nxt2004 to init.\n");
333
334 return;
335 }
336
337 static int nxt200x_writetuner (struct nxt200x_state* state, u8* data)
338 {
339 u8 buf, count = 0;
340
341 dprintk("%s\n", __func__);
342
343 dprintk("Tuner Bytes: %*ph\n", 4, data + 1);
344
345 /* if NXT2004, write directly to tuner. if NXT2002, write through NXT chip.
346 * direct write is required for Philips TUV1236D and ALPS TDHU2 */
347 switch (state->demod_chip) {
348 case NXT2004:
349 if (i2c_writebytes(state, data[0], data+1, 4))
350 pr_warn("error writing to tuner\n");
351 /* wait until we have a lock */
352 while (count < 20) {
353 i2c_readbytes(state, data[0], &buf, 1);
354 if (buf & 0x40)
355 return 0;
356 msleep(100);
357 count++;
358 }
359 pr_warn("timeout waiting for tuner lock\n");
360 break;
361 case NXT2002:
362 /* set the i2c transfer speed to the tuner */
363 buf = 0x03;
364 nxt200x_writebytes(state, 0x20, &buf, 1);
365
366 /* setup to transfer 4 bytes via i2c */
367 buf = 0x04;
368 nxt200x_writebytes(state, 0x34, &buf, 1);
369
370 /* write actual tuner bytes */
371 nxt200x_writebytes(state, 0x36, data+1, 4);
372
373 /* set tuner i2c address */
374 buf = data[0] << 1;
375 nxt200x_writebytes(state, 0x35, &buf, 1);
376
377 /* write UC Opmode to begin transfer */
378 buf = 0x80;
379 nxt200x_writebytes(state, 0x21, &buf, 1);
380
381 while (count < 20) {
382 nxt200x_readbytes(state, 0x21, &buf, 1);
383 if ((buf & 0x80)== 0x00)
384 return 0;
385 msleep(100);
386 count++;
387 }
388 pr_warn("timeout error writing to tuner\n");
389 break;
390 default:
391 return -EINVAL;
392 break;
393 }
394 return 0;
395 }
396
397 static void nxt200x_agc_reset(struct nxt200x_state* state)
398 {
399 u8 buf;
400 dprintk("%s\n", __func__);
401
402 switch (state->demod_chip) {
403 case NXT2002:
404 buf = 0x08;
405 nxt200x_writebytes(state, 0x08, &buf, 1);
406 buf = 0x00;
407 nxt200x_writebytes(state, 0x08, &buf, 1);
408 break;
409 case NXT2004:
410 nxt200x_readreg_multibyte(state, 0x08, &buf, 1);
411 buf = 0x08;
412 nxt200x_writereg_multibyte(state, 0x08, &buf, 1);
413 buf = 0x00;
414 nxt200x_writereg_multibyte(state, 0x08, &buf, 1);
415 break;
416 default:
417 break;
418 }
419 return;
420 }
421
422 static int nxt2002_load_firmware (struct dvb_frontend* fe, const struct firmware *fw)
423 {
424
425 struct nxt200x_state* state = fe->demodulator_priv;
426 u8 buf[3], written = 0, chunkpos = 0;
427 u16 rambase, position, crc = 0;
428
429 dprintk("%s\n", __func__);
430 dprintk("Firmware is %zu bytes\n", fw->size);
431
432 /* Get the RAM base for this nxt2002 */
433 nxt200x_readbytes(state, 0x10, buf, 1);
434
435 if (buf[0] & 0x10)
436 rambase = 0x1000;
437 else
438 rambase = 0x0000;
439
440 dprintk("rambase on this nxt2002 is %04X\n", rambase);
441
442 /* Hold the micro in reset while loading firmware */
443 buf[0] = 0x80;
444 nxt200x_writebytes(state, 0x2B, buf, 1);
445
446 for (position = 0; position < fw->size; position++) {
447 if (written == 0) {
448 crc = 0;
449 chunkpos = 0x28;
450 buf[0] = ((rambase + position) >> 8);
451 buf[1] = (rambase + position) & 0xFF;
452 buf[2] = 0x81;
453 /* write starting address */
454 nxt200x_writebytes(state, 0x29, buf, 3);
455 }
456 written++;
457 chunkpos++;
458
459 if ((written % 4) == 0)
460 nxt200x_writebytes(state, chunkpos, &fw->data[position-3], 4);
461
462 crc = nxt200x_crc(crc, fw->data[position]);
463
464 if ((written == 255) || (position+1 == fw->size)) {
465 /* write remaining bytes of firmware */
466 nxt200x_writebytes(state, chunkpos+4-(written %4),
467 &fw->data[position-(written %4) + 1],
468 written %4);
469 buf[0] = crc << 8;
470 buf[1] = crc & 0xFF;
471
472 /* write crc */
473 nxt200x_writebytes(state, 0x2C, buf, 2);
474
475 /* do a read to stop things */
476 nxt200x_readbytes(state, 0x2A, buf, 1);
477
478 /* set transfer mode to complete */
479 buf[0] = 0x80;
480 nxt200x_writebytes(state, 0x2B, buf, 1);
481
482 written = 0;
483 }
484 }
485
486 return 0;
487 };
488
489 static int nxt2004_load_firmware (struct dvb_frontend* fe, const struct firmware *fw)
490 {
491
492 struct nxt200x_state* state = fe->demodulator_priv;
493 u8 buf[3];
494 u16 rambase, position, crc=0;
495
496 dprintk("%s\n", __func__);
497 dprintk("Firmware is %zu bytes\n", fw->size);
498
499 /* set rambase */
500 rambase = 0x1000;
501
502 /* hold the micro in reset while loading firmware */
503 buf[0] = 0x80;
504 nxt200x_writebytes(state, 0x2B, buf,1);
505
506 /* calculate firmware CRC */
507 for (position = 0; position < fw->size; position++) {
508 crc = nxt200x_crc(crc, fw->data[position]);
509 }
510
511 buf[0] = rambase >> 8;
512 buf[1] = rambase & 0xFF;
513 buf[2] = 0x81;
514 /* write starting address */
515 nxt200x_writebytes(state,0x29,buf,3);
516
517 for (position = 0; position < fw->size;) {
518 nxt200x_writebytes(state, 0x2C, &fw->data[position],
519 fw->size-position > 255 ? 255 : fw->size-position);
520 position += (fw->size-position > 255 ? 255 : fw->size-position);
521 }
522 buf[0] = crc >> 8;
523 buf[1] = crc & 0xFF;
524
525 dprintk("firmware crc is 0x%02X 0x%02X\n", buf[0], buf[1]);
526
527 /* write crc */
528 nxt200x_writebytes(state, 0x2C, buf,2);
529
530 /* do a read to stop things */
531 nxt200x_readbytes(state, 0x2C, buf, 1);
532
533 /* set transfer mode to complete */
534 buf[0] = 0x80;
535 nxt200x_writebytes(state, 0x2B, buf,1);
536
537 return 0;
538 };
539
540 static int nxt200x_setup_frontend_parameters(struct dvb_frontend *fe)
541 {
542 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
543 struct nxt200x_state* state = fe->demodulator_priv;
544 u8 buf[5];
545
546 /* stop the micro first */
547 nxt200x_microcontroller_stop(state);
548
549 if (state->demod_chip == NXT2004) {
550 /* make sure demod is set to digital */
551 buf[0] = 0x04;
552 nxt200x_writebytes(state, 0x14, buf, 1);
553 buf[0] = 0x00;
554 nxt200x_writebytes(state, 0x17, buf, 1);
555 }
556
557 /* set additional params */
558 switch (p->modulation) {
559 case QAM_64:
560 case QAM_256:
561 /* Set punctured clock for QAM */
562 /* This is just a guess since I am unable to test it */
563 if (state->config->set_ts_params)
564 state->config->set_ts_params(fe, 1);
565 break;
566 case VSB_8:
567 /* Set non-punctured clock for VSB */
568 if (state->config->set_ts_params)
569 state->config->set_ts_params(fe, 0);
570 break;
571 default:
572 return -EINVAL;
573 break;
574 }
575
576 if (fe->ops.tuner_ops.calc_regs) {
577 /* get tuning information */
578 fe->ops.tuner_ops.calc_regs(fe, buf, 5);
579
580 /* write frequency information */
581 nxt200x_writetuner(state, buf);
582 }
583
584 /* reset the agc now that tuning has been completed */
585 nxt200x_agc_reset(state);
586
587 /* set target power level */
588 switch (p->modulation) {
589 case QAM_64:
590 case QAM_256:
591 buf[0] = 0x74;
592 break;
593 case VSB_8:
594 buf[0] = 0x70;
595 break;
596 default:
597 return -EINVAL;
598 break;
599 }
600 nxt200x_writebytes(state, 0x42, buf, 1);
601
602 /* configure sdm */
603 switch (state->demod_chip) {
604 case NXT2002:
605 buf[0] = 0x87;
606 break;
607 case NXT2004:
608 buf[0] = 0x07;
609 break;
610 default:
611 return -EINVAL;
612 break;
613 }
614 nxt200x_writebytes(state, 0x57, buf, 1);
615
616 /* write sdm1 input */
617 buf[0] = 0x10;
618 buf[1] = 0x00;
619 switch (state->demod_chip) {
620 case NXT2002:
621 nxt200x_writereg_multibyte(state, 0x58, buf, 2);
622 break;
623 case NXT2004:
624 nxt200x_writebytes(state, 0x58, buf, 2);
625 break;
626 default:
627 return -EINVAL;
628 break;
629 }
630
631 /* write sdmx input */
632 switch (p->modulation) {
633 case QAM_64:
634 buf[0] = 0x68;
635 break;
636 case QAM_256:
637 buf[0] = 0x64;
638 break;
639 case VSB_8:
640 buf[0] = 0x60;
641 break;
642 default:
643 return -EINVAL;
644 break;
645 }
646 buf[1] = 0x00;
647 switch (state->demod_chip) {
648 case NXT2002:
649 nxt200x_writereg_multibyte(state, 0x5C, buf, 2);
650 break;
651 case NXT2004:
652 nxt200x_writebytes(state, 0x5C, buf, 2);
653 break;
654 default:
655 return -EINVAL;
656 break;
657 }
658
659 /* write adc power lpf fc */
660 buf[0] = 0x05;
661 nxt200x_writebytes(state, 0x43, buf, 1);
662
663 if (state->demod_chip == NXT2004) {
664 /* write ??? */
665 buf[0] = 0x00;
666 buf[1] = 0x00;
667 nxt200x_writebytes(state, 0x46, buf, 2);
668 }
669
670 /* write accumulator2 input */
671 buf[0] = 0x80;
672 buf[1] = 0x00;
673 switch (state->demod_chip) {
674 case NXT2002:
675 nxt200x_writereg_multibyte(state, 0x4B, buf, 2);
676 break;
677 case NXT2004:
678 nxt200x_writebytes(state, 0x4B, buf, 2);
679 break;
680 default:
681 return -EINVAL;
682 break;
683 }
684
685 /* write kg1 */
686 buf[0] = 0x00;
687 nxt200x_writebytes(state, 0x4D, buf, 1);
688
689 /* write sdm12 lpf fc */
690 buf[0] = 0x44;
691 nxt200x_writebytes(state, 0x55, buf, 1);
692
693 /* write agc control reg */
694 buf[0] = 0x04;
695 nxt200x_writebytes(state, 0x41, buf, 1);
696
697 if (state->demod_chip == NXT2004) {
698 nxt200x_readreg_multibyte(state, 0x80, buf, 1);
699 buf[0] = 0x24;
700 nxt200x_writereg_multibyte(state, 0x80, buf, 1);
701
702 /* soft reset? */
703 nxt200x_readreg_multibyte(state, 0x08, buf, 1);
704 buf[0] = 0x10;
705 nxt200x_writereg_multibyte(state, 0x08, buf, 1);
706 nxt200x_readreg_multibyte(state, 0x08, buf, 1);
707 buf[0] = 0x00;
708 nxt200x_writereg_multibyte(state, 0x08, buf, 1);
709
710 nxt200x_readreg_multibyte(state, 0x80, buf, 1);
711 buf[0] = 0x04;
712 nxt200x_writereg_multibyte(state, 0x80, buf, 1);
713 buf[0] = 0x00;
714 nxt200x_writereg_multibyte(state, 0x81, buf, 1);
715 buf[0] = 0x80; buf[1] = 0x00; buf[2] = 0x00;
716 nxt200x_writereg_multibyte(state, 0x82, buf, 3);
717 nxt200x_readreg_multibyte(state, 0x88, buf, 1);
718 buf[0] = 0x11;
719 nxt200x_writereg_multibyte(state, 0x88, buf, 1);
720 nxt200x_readreg_multibyte(state, 0x80, buf, 1);
721 buf[0] = 0x44;
722 nxt200x_writereg_multibyte(state, 0x80, buf, 1);
723 }
724
725 /* write agc ucgp0 */
726 switch (p->modulation) {
727 case QAM_64:
728 buf[0] = 0x02;
729 break;
730 case QAM_256:
731 buf[0] = 0x03;
732 break;
733 case VSB_8:
734 buf[0] = 0x00;
735 break;
736 default:
737 return -EINVAL;
738 break;
739 }
740 nxt200x_writebytes(state, 0x30, buf, 1);
741
742 /* write agc control reg */
743 buf[0] = 0x00;
744 nxt200x_writebytes(state, 0x41, buf, 1);
745
746 /* write accumulator2 input */
747 buf[0] = 0x80;
748 buf[1] = 0x00;
749 switch (state->demod_chip) {
750 case NXT2002:
751 nxt200x_writereg_multibyte(state, 0x49, buf, 2);
752 nxt200x_writereg_multibyte(state, 0x4B, buf, 2);
753 break;
754 case NXT2004:
755 nxt200x_writebytes(state, 0x49, buf, 2);
756 nxt200x_writebytes(state, 0x4B, buf, 2);
757 break;
758 default:
759 return -EINVAL;
760 break;
761 }
762
763 /* write agc control reg */
764 buf[0] = 0x04;
765 nxt200x_writebytes(state, 0x41, buf, 1);
766
767 nxt200x_microcontroller_start(state);
768
769 if (state->demod_chip == NXT2004) {
770 nxt2004_microcontroller_init(state);
771
772 /* ???? */
773 buf[0] = 0xF0;
774 buf[1] = 0x00;
775 nxt200x_writebytes(state, 0x5C, buf, 2);
776 }
777
778 /* adjacent channel detection should be done here, but I don't
779 have any stations with this need so I cannot test it */
780
781 return 0;
782 }
783
784 static int nxt200x_read_status(struct dvb_frontend* fe, fe_status_t* status)
785 {
786 struct nxt200x_state* state = fe->demodulator_priv;
787 u8 lock;
788 nxt200x_readbytes(state, 0x31, &lock, 1);
789
790 *status = 0;
791 if (lock & 0x20) {
792 *status |= FE_HAS_SIGNAL;
793 *status |= FE_HAS_CARRIER;
794 *status |= FE_HAS_VITERBI;
795 *status |= FE_HAS_SYNC;
796 *status |= FE_HAS_LOCK;
797 }
798 return 0;
799 }
800
801 static int nxt200x_read_ber(struct dvb_frontend* fe, u32* ber)
802 {
803 struct nxt200x_state* state = fe->demodulator_priv;
804 u8 b[3];
805
806 nxt200x_readreg_multibyte(state, 0xE6, b, 3);
807
808 *ber = ((b[0] << 8) + b[1]) * 8;
809
810 return 0;
811 }
812
813 static int nxt200x_read_signal_strength(struct dvb_frontend* fe, u16* strength)
814 {
815 struct nxt200x_state* state = fe->demodulator_priv;
816 u8 b[2];
817 u16 temp = 0;
818
819 /* setup to read cluster variance */
820 b[0] = 0x00;
821 nxt200x_writebytes(state, 0xA1, b, 1);
822
823 /* get multreg val */
824 nxt200x_readreg_multibyte(state, 0xA6, b, 2);
825
826 temp = (b[0] << 8) | b[1];
827 *strength = ((0x7FFF - temp) & 0x0FFF) * 16;
828
829 return 0;
830 }
831
832 static int nxt200x_read_snr(struct dvb_frontend* fe, u16* snr)
833 {
834
835 struct nxt200x_state* state = fe->demodulator_priv;
836 u8 b[2];
837 u16 temp = 0, temp2;
838 u32 snrdb = 0;
839
840 /* setup to read cluster variance */
841 b[0] = 0x00;
842 nxt200x_writebytes(state, 0xA1, b, 1);
843
844 /* get multreg val from 0xA6 */
845 nxt200x_readreg_multibyte(state, 0xA6, b, 2);
846
847 temp = (b[0] << 8) | b[1];
848 temp2 = 0x7FFF - temp;
849
850 /* snr will be in db */
851 if (temp2 > 0x7F00)
852 snrdb = 1000*24 + ( 1000*(30-24) * ( temp2 - 0x7F00 ) / ( 0x7FFF - 0x7F00 ) );
853 else if (temp2 > 0x7EC0)
854 snrdb = 1000*18 + ( 1000*(24-18) * ( temp2 - 0x7EC0 ) / ( 0x7F00 - 0x7EC0 ) );
855 else if (temp2 > 0x7C00)
856 snrdb = 1000*12 + ( 1000*(18-12) * ( temp2 - 0x7C00 ) / ( 0x7EC0 - 0x7C00 ) );
857 else
858 snrdb = 1000*0 + ( 1000*(12-0) * ( temp2 - 0 ) / ( 0x7C00 - 0 ) );
859
860 /* the value reported back from the frontend will be FFFF=32db 0000=0db */
861 *snr = snrdb * (0xFFFF/32000);
862
863 return 0;
864 }
865
866 static int nxt200x_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
867 {
868 struct nxt200x_state* state = fe->demodulator_priv;
869 u8 b[3];
870
871 nxt200x_readreg_multibyte(state, 0xE6, b, 3);
872 *ucblocks = b[2];
873
874 return 0;
875 }
876
877 static int nxt200x_sleep(struct dvb_frontend* fe)
878 {
879 return 0;
880 }
881
882 static int nxt2002_init(struct dvb_frontend* fe)
883 {
884 struct nxt200x_state* state = fe->demodulator_priv;
885 const struct firmware *fw;
886 int ret;
887 u8 buf[2];
888
889 /* request the firmware, this will block until someone uploads it */
890 pr_debug("%s: Waiting for firmware upload (%s)...\n",
891 __func__, NXT2002_DEFAULT_FIRMWARE);
892 ret = request_firmware(&fw, NXT2002_DEFAULT_FIRMWARE,
893 state->i2c->dev.parent);
894 pr_debug("%s: Waiting for firmware upload(2)...\n", __func__);
895 if (ret) {
896 pr_err("%s: No firmware uploaded (timeout or file not found?)"
897 "\n", __func__);
898 return ret;
899 }
900
901 ret = nxt2002_load_firmware(fe, fw);
902 release_firmware(fw);
903 if (ret) {
904 pr_err("%s: Writing firmware to device failed\n", __func__);
905 return ret;
906 }
907 pr_info("%s: Firmware upload complete\n", __func__);
908
909 /* Put the micro into reset */
910 nxt200x_microcontroller_stop(state);
911
912 /* ensure transfer is complete */
913 buf[0]=0x00;
914 nxt200x_writebytes(state, 0x2B, buf, 1);
915
916 /* Put the micro into reset for real this time */
917 nxt200x_microcontroller_stop(state);
918
919 /* soft reset everything (agc,frontend,eq,fec)*/
920 buf[0] = 0x0F;
921 nxt200x_writebytes(state, 0x08, buf, 1);
922 buf[0] = 0x00;
923 nxt200x_writebytes(state, 0x08, buf, 1);
924
925 /* write agc sdm configure */
926 buf[0] = 0xF1;
927 nxt200x_writebytes(state, 0x57, buf, 1);
928
929 /* write mod output format */
930 buf[0] = 0x20;
931 nxt200x_writebytes(state, 0x09, buf, 1);
932
933 /* write fec mpeg mode */
934 buf[0] = 0x7E;
935 buf[1] = 0x00;
936 nxt200x_writebytes(state, 0xE9, buf, 2);
937
938 /* write mux selection */
939 buf[0] = 0x00;
940 nxt200x_writebytes(state, 0xCC, buf, 1);
941
942 return 0;
943 }
944
945 static int nxt2004_init(struct dvb_frontend* fe)
946 {
947 struct nxt200x_state* state = fe->demodulator_priv;
948 const struct firmware *fw;
949 int ret;
950 u8 buf[3];
951
952 /* ??? */
953 buf[0]=0x00;
954 nxt200x_writebytes(state, 0x1E, buf, 1);
955
956 /* request the firmware, this will block until someone uploads it */
957 pr_debug("%s: Waiting for firmware upload (%s)...\n",
958 __func__, NXT2004_DEFAULT_FIRMWARE);
959 ret = request_firmware(&fw, NXT2004_DEFAULT_FIRMWARE,
960 state->i2c->dev.parent);
961 pr_debug("%s: Waiting for firmware upload(2)...\n", __func__);
962 if (ret) {
963 pr_err("%s: No firmware uploaded (timeout or file not found?)"
964 "\n", __func__);
965 return ret;
966 }
967
968 ret = nxt2004_load_firmware(fe, fw);
969 release_firmware(fw);
970 if (ret) {
971 pr_err("%s: Writing firmware to device failed\n", __func__);
972 return ret;
973 }
974 pr_info("%s: Firmware upload complete\n", __func__);
975
976 /* ensure transfer is complete */
977 buf[0] = 0x01;
978 nxt200x_writebytes(state, 0x19, buf, 1);
979
980 nxt2004_microcontroller_init(state);
981 nxt200x_microcontroller_stop(state);
982 nxt200x_microcontroller_stop(state);
983 nxt2004_microcontroller_init(state);
984 nxt200x_microcontroller_stop(state);
985
986 /* soft reset everything (agc,frontend,eq,fec)*/
987 buf[0] = 0xFF;
988 nxt200x_writereg_multibyte(state, 0x08, buf, 1);
989 buf[0] = 0x00;
990 nxt200x_writereg_multibyte(state, 0x08, buf, 1);
991
992 /* write agc sdm configure */
993 buf[0] = 0xD7;
994 nxt200x_writebytes(state, 0x57, buf, 1);
995
996 /* ???*/
997 buf[0] = 0x07;
998 buf[1] = 0xfe;
999 nxt200x_writebytes(state, 0x35, buf, 2);
1000 buf[0] = 0x12;
1001 nxt200x_writebytes(state, 0x34, buf, 1);
1002 buf[0] = 0x80;
1003 nxt200x_writebytes(state, 0x21, buf, 1);
1004
1005 /* ???*/
1006 buf[0] = 0x21;
1007 nxt200x_writebytes(state, 0x0A, buf, 1);
1008
1009 /* ???*/
1010 buf[0] = 0x01;
1011 nxt200x_writereg_multibyte(state, 0x80, buf, 1);
1012
1013 /* write fec mpeg mode */
1014 buf[0] = 0x7E;
1015 buf[1] = 0x00;
1016 nxt200x_writebytes(state, 0xE9, buf, 2);
1017
1018 /* write mux selection */
1019 buf[0] = 0x00;
1020 nxt200x_writebytes(state, 0xCC, buf, 1);
1021
1022 /* ???*/
1023 nxt200x_readreg_multibyte(state, 0x80, buf, 1);
1024 buf[0] = 0x00;
1025 nxt200x_writereg_multibyte(state, 0x80, buf, 1);
1026
1027 /* soft reset? */
1028 nxt200x_readreg_multibyte(state, 0x08, buf, 1);
1029 buf[0] = 0x10;
1030 nxt200x_writereg_multibyte(state, 0x08, buf, 1);
1031 nxt200x_readreg_multibyte(state, 0x08, buf, 1);
1032 buf[0] = 0x00;
1033 nxt200x_writereg_multibyte(state, 0x08, buf, 1);
1034
1035 /* ???*/
1036 nxt200x_readreg_multibyte(state, 0x80, buf, 1);
1037 buf[0] = 0x01;
1038 nxt200x_writereg_multibyte(state, 0x80, buf, 1);
1039 buf[0] = 0x70;
1040 nxt200x_writereg_multibyte(state, 0x81, buf, 1);
1041 buf[0] = 0x31; buf[1] = 0x5E; buf[2] = 0x66;
1042 nxt200x_writereg_multibyte(state, 0x82, buf, 3);
1043
1044 nxt200x_readreg_multibyte(state, 0x88, buf, 1);
1045 buf[0] = 0x11;
1046 nxt200x_writereg_multibyte(state, 0x88, buf, 1);
1047 nxt200x_readreg_multibyte(state, 0x80, buf, 1);
1048 buf[0] = 0x40;
1049 nxt200x_writereg_multibyte(state, 0x80, buf, 1);
1050
1051 nxt200x_readbytes(state, 0x10, buf, 1);
1052 buf[0] = 0x10;
1053 nxt200x_writebytes(state, 0x10, buf, 1);
1054 nxt200x_readbytes(state, 0x0A, buf, 1);
1055 buf[0] = 0x21;
1056 nxt200x_writebytes(state, 0x0A, buf, 1);
1057
1058 nxt2004_microcontroller_init(state);
1059
1060 buf[0] = 0x21;
1061 nxt200x_writebytes(state, 0x0A, buf, 1);
1062 buf[0] = 0x7E;
1063 nxt200x_writebytes(state, 0xE9, buf, 1);
1064 buf[0] = 0x00;
1065 nxt200x_writebytes(state, 0xEA, buf, 1);
1066
1067 nxt200x_readreg_multibyte(state, 0x80, buf, 1);
1068 buf[0] = 0x00;
1069 nxt200x_writereg_multibyte(state, 0x80, buf, 1);
1070 nxt200x_readreg_multibyte(state, 0x80, buf, 1);
1071 buf[0] = 0x00;
1072 nxt200x_writereg_multibyte(state, 0x80, buf, 1);
1073
1074 /* soft reset? */
1075 nxt200x_readreg_multibyte(state, 0x08, buf, 1);
1076 buf[0] = 0x10;
1077 nxt200x_writereg_multibyte(state, 0x08, buf, 1);
1078 nxt200x_readreg_multibyte(state, 0x08, buf, 1);
1079 buf[0] = 0x00;
1080 nxt200x_writereg_multibyte(state, 0x08, buf, 1);
1081
1082 nxt200x_readreg_multibyte(state, 0x80, buf, 1);
1083 buf[0] = 0x04;
1084 nxt200x_writereg_multibyte(state, 0x80, buf, 1);
1085 buf[0] = 0x00;
1086 nxt200x_writereg_multibyte(state, 0x81, buf, 1);
1087 buf[0] = 0x80; buf[1] = 0x00; buf[2] = 0x00;
1088 nxt200x_writereg_multibyte(state, 0x82, buf, 3);
1089
1090 nxt200x_readreg_multibyte(state, 0x88, buf, 1);
1091 buf[0] = 0x11;
1092 nxt200x_writereg_multibyte(state, 0x88, buf, 1);
1093
1094 nxt200x_readreg_multibyte(state, 0x80, buf, 1);
1095 buf[0] = 0x44;
1096 nxt200x_writereg_multibyte(state, 0x80, buf, 1);
1097
1098 /* initialize tuner */
1099 nxt200x_readbytes(state, 0x10, buf, 1);
1100 buf[0] = 0x12;
1101 nxt200x_writebytes(state, 0x10, buf, 1);
1102 buf[0] = 0x04;
1103 nxt200x_writebytes(state, 0x13, buf, 1);
1104 buf[0] = 0x00;
1105 nxt200x_writebytes(state, 0x16, buf, 1);
1106 buf[0] = 0x04;
1107 nxt200x_writebytes(state, 0x14, buf, 1);
1108 buf[0] = 0x00;
1109 nxt200x_writebytes(state, 0x14, buf, 1);
1110 nxt200x_writebytes(state, 0x17, buf, 1);
1111 nxt200x_writebytes(state, 0x14, buf, 1);
1112 nxt200x_writebytes(state, 0x17, buf, 1);
1113
1114 return 0;
1115 }
1116
1117 static int nxt200x_init(struct dvb_frontend* fe)
1118 {
1119 struct nxt200x_state* state = fe->demodulator_priv;
1120 int ret = 0;
1121
1122 if (!state->initialised) {
1123 switch (state->demod_chip) {
1124 case NXT2002:
1125 ret = nxt2002_init(fe);
1126 break;
1127 case NXT2004:
1128 ret = nxt2004_init(fe);
1129 break;
1130 default:
1131 return -EINVAL;
1132 break;
1133 }
1134 state->initialised = 1;
1135 }
1136 return ret;
1137 }
1138
1139 static int nxt200x_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings)
1140 {
1141 fesettings->min_delay_ms = 500;
1142 fesettings->step_size = 0;
1143 fesettings->max_drift = 0;
1144 return 0;
1145 }
1146
1147 static void nxt200x_release(struct dvb_frontend* fe)
1148 {
1149 struct nxt200x_state* state = fe->demodulator_priv;
1150 kfree(state);
1151 }
1152
1153 static struct dvb_frontend_ops nxt200x_ops;
1154
1155 struct dvb_frontend* nxt200x_attach(const struct nxt200x_config* config,
1156 struct i2c_adapter* i2c)
1157 {
1158 struct nxt200x_state* state = NULL;
1159 u8 buf [] = {0,0,0,0,0};
1160
1161 /* allocate memory for the internal state */
1162 state = kzalloc(sizeof(struct nxt200x_state), GFP_KERNEL);
1163 if (state == NULL)
1164 goto error;
1165
1166 /* setup the state */
1167 state->config = config;
1168 state->i2c = i2c;
1169 state->initialised = 0;
1170
1171 /* read card id */
1172 nxt200x_readbytes(state, 0x00, buf, 5);
1173 dprintk("NXT info: %*ph\n", 5, buf);
1174
1175 /* set demod chip */
1176 switch (buf[0]) {
1177 case 0x04:
1178 state->demod_chip = NXT2002;
1179 pr_info("NXT2002 Detected\n");
1180 break;
1181 case 0x05:
1182 state->demod_chip = NXT2004;
1183 pr_info("NXT2004 Detected\n");
1184 break;
1185 default:
1186 goto error;
1187 }
1188
1189 /* make sure demod chip is supported */
1190 switch (state->demod_chip) {
1191 case NXT2002:
1192 if (buf[0] != 0x04) goto error; /* device id */
1193 if (buf[1] != 0x02) goto error; /* fab id */
1194 if (buf[2] != 0x11) goto error; /* month */
1195 if (buf[3] != 0x20) goto error; /* year msb */
1196 if (buf[4] != 0x00) goto error; /* year lsb */
1197 break;
1198 case NXT2004:
1199 if (buf[0] != 0x05) goto error; /* device id */
1200 break;
1201 default:
1202 goto error;
1203 }
1204
1205 /* create dvb_frontend */
1206 memcpy(&state->frontend.ops, &nxt200x_ops, sizeof(struct dvb_frontend_ops));
1207 state->frontend.demodulator_priv = state;
1208 return &state->frontend;
1209
1210 error:
1211 kfree(state);
1212 pr_err("Unknown/Unsupported NXT chip: %*ph\n", 5, buf);
1213 return NULL;
1214 }
1215
1216 static struct dvb_frontend_ops nxt200x_ops = {
1217 .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B },
1218 .info = {
1219 .name = "Nextwave NXT200X VSB/QAM frontend",
1220 .frequency_min = 54000000,
1221 .frequency_max = 860000000,
1222 .frequency_stepsize = 166666, /* stepsize is just a guess */
1223 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
1224 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
1225 FE_CAN_8VSB | FE_CAN_QAM_64 | FE_CAN_QAM_256
1226 },
1227
1228 .release = nxt200x_release,
1229
1230 .init = nxt200x_init,
1231 .sleep = nxt200x_sleep,
1232
1233 .set_frontend = nxt200x_setup_frontend_parameters,
1234 .get_tune_settings = nxt200x_get_tune_settings,
1235
1236 .read_status = nxt200x_read_status,
1237 .read_ber = nxt200x_read_ber,
1238 .read_signal_strength = nxt200x_read_signal_strength,
1239 .read_snr = nxt200x_read_snr,
1240 .read_ucblocks = nxt200x_read_ucblocks,
1241 };
1242
1243 module_param(debug, int, 0644);
1244 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
1245
1246 MODULE_DESCRIPTION("NXT200X (ATSC 8VSB & ITU-T J.83 AnnexB 64/256 QAM) Demodulator Driver");
1247 MODULE_AUTHOR("Kirk Lapray, Michael Krufky, Jean-Francois Thibert, and Taylor Jacob");
1248 MODULE_LICENSE("GPL");
1249
1250 EXPORT_SYMBOL(nxt200x_attach);
1251
Linux with added FPC-III support