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Committer: Michael Beasley <mike@snafu.setup>
[mikesnafu-overlay.git] / drivers / media / dvb / frontends / nxt200x.c
blobfcf964fe1d6bebb2ca9f62847fdcfd67ee8d05b1
1 /*
2 * Support for NXT2002 and NXT2004 - VSB/QAM
3 *
4 * Copyright (C) 2005 Kirk Lapray <kirk.lapray@gmail.com>
5 * Copyright (C) 2006 Michael Krufky <mkrufky@m1k.net>
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 NXT2002_DEFAULT_FIRMWARE "dvb-fe-nxt2002.fw"
41 #define NXT2004_DEFAULT_FIRMWARE "dvb-fe-nxt2004.fw"
42 #define CRC_CCIT_MASK 0x1021
43
44 #include <linux/kernel.h>
45 #include <linux/init.h>
46 #include <linux/module.h>
47 #include <linux/slab.h>
48 #include <linux/string.h>
49
50 #include "dvb_frontend.h"
51 #include "nxt200x.h"
52
53 struct nxt200x_state {
54
55 struct i2c_adapter* i2c;
56 const struct nxt200x_config* config;
57 struct dvb_frontend frontend;
58
59 /* demodulator private data */
60 nxt_chip_type demod_chip;
61 u8 initialised:1;
62 };
63
64 static int debug;
65 #define dprintk(args...) \
66 do { \
67 if (debug) printk(KERN_DEBUG "nxt200x: " args); \
68 } while (0)
69
70 static int i2c_writebytes (struct nxt200x_state* state, u8 addr, u8 *buf, u8 len)
71 {
72 int err;
73 struct i2c_msg msg = { .addr = addr, .flags = 0, .buf = buf, .len = len };
74
75 if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
76 printk (KERN_WARNING "nxt200x: %s: i2c write error (addr 0x%02x, err == %i)\n",
77 __FUNCTION__, addr, err);
78 return -EREMOTEIO;
79 }
80 return 0;
81 }
82
83 static u8 i2c_readbytes (struct nxt200x_state* state, u8 addr, u8* buf, u8 len)
84 {
85 int err;
86 struct i2c_msg msg = { .addr = addr, .flags = I2C_M_RD, .buf = buf, .len = len };
87
88 if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
89 printk (KERN_WARNING "nxt200x: %s: i2c read error (addr 0x%02x, err == %i)\n",
90 __FUNCTION__, addr, err);
91 return -EREMOTEIO;
92 }
93 return 0;
94 }
95
96 static int nxt200x_writebytes (struct nxt200x_state* state, u8 reg, u8 *buf, u8 len)
97 {
98 u8 buf2 [len+1];
99 int err;
100 struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf2, .len = len + 1 };
101
102 buf2[0] = reg;
103 memcpy(&buf2[1], buf, len);
104
105 if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
106 printk (KERN_WARNING "nxt200x: %s: i2c write error (addr 0x%02x, err == %i)\n",
107 __FUNCTION__, state->config->demod_address, err);
108 return -EREMOTEIO;
109 }
110 return 0;
111 }
112
113 static u8 nxt200x_readbytes (struct nxt200x_state* state, u8 reg, u8* buf, u8 len)
114 {
115 u8 reg2 [] = { reg };
116
117 struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = reg2, .len = 1 },
118 { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = buf, .len = len } };
119
120 int err;
121
122 if ((err = i2c_transfer (state->i2c, msg, 2)) != 2) {
123 printk (KERN_WARNING "nxt200x: %s: i2c read error (addr 0x%02x, err == %i)\n",
124 __FUNCTION__, state->config->demod_address, err);
125 return -EREMOTEIO;
126 }
127 return 0;
128 }
129
130 static u16 nxt200x_crc(u16 crc, u8 c)
131 {
132 u8 i;
133 u16 input = (u16) c & 0xFF;
134
135 input<<=8;
136 for(i=0; i<8; i++) {
137 if((crc^input) & 0x8000)
138 crc=(crc<<1)^CRC_CCIT_MASK;
139 else
140 crc<<=1;
141 input<<=1;
142 }
143 return crc;
144 }
145
146 static int nxt200x_writereg_multibyte (struct nxt200x_state* state, u8 reg, u8* data, u8 len)
147 {
148 u8 attr, len2, buf;
149 dprintk("%s\n", __FUNCTION__);
150
151 /* set mutli register register */
152 nxt200x_writebytes(state, 0x35, &reg, 1);
153
154 /* send the actual data */
155 nxt200x_writebytes(state, 0x36, data, len);
156
157 switch (state->demod_chip) {
158 case NXT2002:
159 len2 = len;
160 buf = 0x02;
161 break;
162 case NXT2004:
163 /* probably not right, but gives correct values */
164 attr = 0x02;
165 if (reg & 0x80) {
166 attr = attr << 1;
167 if (reg & 0x04)
168 attr = attr >> 1;
169 }
170 /* set write bit */
171 len2 = ((attr << 4) | 0x10) | len;
172 buf = 0x80;
173 break;
174 default:
175 return -EINVAL;
176 break;
177 }
178
179 /* set multi register length */
180 nxt200x_writebytes(state, 0x34, &len2, 1);
181
182 /* toggle the multireg write bit */
183 nxt200x_writebytes(state, 0x21, &buf, 1);
184
185 nxt200x_readbytes(state, 0x21, &buf, 1);
186
187 switch (state->demod_chip) {
188 case NXT2002:
189 if ((buf & 0x02) == 0)
190 return 0;
191 break;
192 case NXT2004:
193 if (buf == 0)
194 return 0;
195 break;
196 default:
197 return -EINVAL;
198 break;
199 }
200
201 printk(KERN_WARNING "nxt200x: Error writing multireg register 0x%02X\n",reg);
202
203 return 0;
204 }
205
206 static int nxt200x_readreg_multibyte (struct nxt200x_state* state, u8 reg, u8* data, u8 len)
207 {
208 int i;
209 u8 buf, len2, attr;
210 dprintk("%s\n", __FUNCTION__);
211
212 /* set mutli register register */
213 nxt200x_writebytes(state, 0x35, &reg, 1);
214
215 switch (state->demod_chip) {
216 case NXT2002:
217 /* set multi register length */
218 len2 = len & 0x80;
219 nxt200x_writebytes(state, 0x34, &len2, 1);
220
221 /* read the actual data */
222 nxt200x_readbytes(state, reg, data, len);
223 return 0;
224 break;
225 case NXT2004:
226 /* probably not right, but gives correct values */
227 attr = 0x02;
228 if (reg & 0x80) {
229 attr = attr << 1;
230 if (reg & 0x04)
231 attr = attr >> 1;
232 }
233
234 /* set multi register length */
235 len2 = (attr << 4) | len;
236 nxt200x_writebytes(state, 0x34, &len2, 1);
237
238 /* toggle the multireg bit*/
239 buf = 0x80;
240 nxt200x_writebytes(state, 0x21, &buf, 1);
241
242 /* read the actual data */
243 for(i = 0; i < len; i++) {
244 nxt200x_readbytes(state, 0x36 + i, &data[i], 1);
245 }
246 return 0;
247 break;
248 default:
249 return -EINVAL;
250 break;
251 }
252 }
253
254 static void nxt200x_microcontroller_stop (struct nxt200x_state* state)
255 {
256 u8 buf, stopval, counter = 0;
257 dprintk("%s\n", __FUNCTION__);
258
259 /* set correct stop value */
260 switch (state->demod_chip) {
261 case NXT2002:
262 stopval = 0x40;
263 break;
264 case NXT2004:
265 stopval = 0x10;
266 break;
267 default:
268 stopval = 0;
269 break;
270 }
271
272 buf = 0x80;
273 nxt200x_writebytes(state, 0x22, &buf, 1);
274
275 while (counter < 20) {
276 nxt200x_readbytes(state, 0x31, &buf, 1);
277 if (buf & stopval)
278 return;
279 msleep(10);
280 counter++;
281 }
282
283 printk(KERN_WARNING "nxt200x: Timeout waiting for nxt200x to stop. This is ok after firmware upload.\n");
284 return;
285 }
286
287 static void nxt200x_microcontroller_start (struct nxt200x_state* state)
288 {
289 u8 buf;
290 dprintk("%s\n", __FUNCTION__);
291
292 buf = 0x00;
293 nxt200x_writebytes(state, 0x22, &buf, 1);
294 }
295
296 static void nxt2004_microcontroller_init (struct nxt200x_state* state)
297 {
298 u8 buf[9];
299 u8 counter = 0;
300 dprintk("%s\n", __FUNCTION__);
301
302 buf[0] = 0x00;
303 nxt200x_writebytes(state, 0x2b, buf, 1);
304 buf[0] = 0x70;
305 nxt200x_writebytes(state, 0x34, buf, 1);
306 buf[0] = 0x04;
307 nxt200x_writebytes(state, 0x35, buf, 1);
308 buf[0] = 0x01; buf[1] = 0x23; buf[2] = 0x45; buf[3] = 0x67; buf[4] = 0x89;
309 buf[5] = 0xAB; buf[6] = 0xCD; buf[7] = 0xEF; buf[8] = 0xC0;
310 nxt200x_writebytes(state, 0x36, buf, 9);
311 buf[0] = 0x80;
312 nxt200x_writebytes(state, 0x21, buf, 1);
313
314 while (counter < 20) {
315 nxt200x_readbytes(state, 0x21, buf, 1);
316 if (buf[0] == 0)
317 return;
318 msleep(10);
319 counter++;
320 }
321
322 printk(KERN_WARNING "nxt200x: Timeout waiting for nxt2004 to init.\n");
323
324 return;
325 }
326
327 static int nxt200x_writetuner (struct nxt200x_state* state, u8* data)
328 {
329 u8 buf, count = 0;
330
331 dprintk("%s\n", __FUNCTION__);
332
333 dprintk("Tuner Bytes: %02X %02X %02X %02X\n", data[1], data[2], data[3], data[4]);
334
335 /* if NXT2004, write directly to tuner. if NXT2002, write through NXT chip.
336 * direct write is required for Philips TUV1236D and ALPS TDHU2 */
337 switch (state->demod_chip) {
338 case NXT2004:
339 if (i2c_writebytes(state, data[0], data+1, 4))
340 printk(KERN_WARNING "nxt200x: error writing to tuner\n");
341 /* wait until we have a lock */
342 while (count < 20) {
343 i2c_readbytes(state, data[0], &buf, 1);
344 if (buf & 0x40)
345 return 0;
346 msleep(100);
347 count++;
348 }
349 printk("nxt2004: timeout waiting for tuner lock\n");
350 break;
351 case NXT2002:
352 /* set the i2c transfer speed to the tuner */
353 buf = 0x03;
354 nxt200x_writebytes(state, 0x20, &buf, 1);
355
356 /* setup to transfer 4 bytes via i2c */
357 buf = 0x04;
358 nxt200x_writebytes(state, 0x34, &buf, 1);
359
360 /* write actual tuner bytes */
361 nxt200x_writebytes(state, 0x36, data+1, 4);
362
363 /* set tuner i2c address */
364 buf = data[0] << 1;
365 nxt200x_writebytes(state, 0x35, &buf, 1);
366
367 /* write UC Opmode to begin transfer */
368 buf = 0x80;
369 nxt200x_writebytes(state, 0x21, &buf, 1);
370
371 while (count < 20) {
372 nxt200x_readbytes(state, 0x21, &buf, 1);
373 if ((buf & 0x80)== 0x00)
374 return 0;
375 msleep(100);
376 count++;
377 }
378 printk("nxt2002: timeout error writing tuner\n");
379 break;
380 default:
381 return -EINVAL;
382 break;
383 }
384 return 0;
385 }
386
387 static void nxt200x_agc_reset(struct nxt200x_state* state)
388 {
389 u8 buf;
390 dprintk("%s\n", __FUNCTION__);
391
392 switch (state->demod_chip) {
393 case NXT2002:
394 buf = 0x08;
395 nxt200x_writebytes(state, 0x08, &buf, 1);
396 buf = 0x00;
397 nxt200x_writebytes(state, 0x08, &buf, 1);
398 break;
399 case NXT2004:
400 nxt200x_readreg_multibyte(state, 0x08, &buf, 1);
401 buf = 0x08;
402 nxt200x_writereg_multibyte(state, 0x08, &buf, 1);
403 buf = 0x00;
404 nxt200x_writereg_multibyte(state, 0x08, &buf, 1);
405 break;
406 default:
407 break;
408 }
409 return;
410 }
411
412 static int nxt2002_load_firmware (struct dvb_frontend* fe, const struct firmware *fw)
413 {
414
415 struct nxt200x_state* state = fe->demodulator_priv;
416 u8 buf[3], written = 0, chunkpos = 0;
417 u16 rambase, position, crc = 0;
418
419 dprintk("%s\n", __FUNCTION__);
420 dprintk("Firmware is %zu bytes\n", fw->size);
421
422 /* Get the RAM base for this nxt2002 */
423 nxt200x_readbytes(state, 0x10, buf, 1);
424
425 if (buf[0] & 0x10)
426 rambase = 0x1000;
427 else
428 rambase = 0x0000;
429
430 dprintk("rambase on this nxt2002 is %04X\n", rambase);
431
432 /* Hold the micro in reset while loading firmware */
433 buf[0] = 0x80;
434 nxt200x_writebytes(state, 0x2B, buf, 1);
435
436 for (position = 0; position < fw->size; position++) {
437 if (written == 0) {
438 crc = 0;
439 chunkpos = 0x28;
440 buf[0] = ((rambase + position) >> 8);
441 buf[1] = (rambase + position) & 0xFF;
442 buf[2] = 0x81;
443 /* write starting address */
444 nxt200x_writebytes(state, 0x29, buf, 3);
445 }
446 written++;
447 chunkpos++;
448
449 if ((written % 4) == 0)
450 nxt200x_writebytes(state, chunkpos, &fw->data[position-3], 4);
451
452 crc = nxt200x_crc(crc, fw->data[position]);
453
454 if ((written == 255) || (position+1 == fw->size)) {
455 /* write remaining bytes of firmware */
456 nxt200x_writebytes(state, chunkpos+4-(written %4),
457 &fw->data[position-(written %4) + 1],
458 written %4);
459 buf[0] = crc << 8;
460 buf[1] = crc & 0xFF;
461
462 /* write crc */
463 nxt200x_writebytes(state, 0x2C, buf, 2);
464
465 /* do a read to stop things */
466 nxt200x_readbytes(state, 0x2A, buf, 1);
467
468 /* set transfer mode to complete */
469 buf[0] = 0x80;
470 nxt200x_writebytes(state, 0x2B, buf, 1);
471
472 written = 0;
473 }
474 }
475
476 return 0;
477 };
478
479 static int nxt2004_load_firmware (struct dvb_frontend* fe, const struct firmware *fw)
480 {
481
482 struct nxt200x_state* state = fe->demodulator_priv;
483 u8 buf[3];
484 u16 rambase, position, crc=0;
485
486 dprintk("%s\n", __FUNCTION__);
487 dprintk("Firmware is %zu bytes\n", fw->size);
488
489 /* set rambase */
490 rambase = 0x1000;
491
492 /* hold the micro in reset while loading firmware */
493 buf[0] = 0x80;
494 nxt200x_writebytes(state, 0x2B, buf,1);
495
496 /* calculate firmware CRC */
497 for (position = 0; position < fw->size; position++) {
498 crc = nxt200x_crc(crc, fw->data[position]);
499 }
500
501 buf[0] = rambase >> 8;
502 buf[1] = rambase & 0xFF;
503 buf[2] = 0x81;
504 /* write starting address */
505 nxt200x_writebytes(state,0x29,buf,3);
506
507 for (position = 0; position < fw->size;) {
508 nxt200x_writebytes(state, 0x2C, &fw->data[position],
509 fw->size-position > 255 ? 255 : fw->size-position);
510 position += (fw->size-position > 255 ? 255 : fw->size-position);
511 }
512 buf[0] = crc >> 8;
513 buf[1] = crc & 0xFF;
514
515 dprintk("firmware crc is 0x%02X 0x%02X\n", buf[0], buf[1]);
516
517 /* write crc */
518 nxt200x_writebytes(state, 0x2C, buf,2);
519
520 /* do a read to stop things */
521 nxt200x_readbytes(state, 0x2C, buf, 1);
522
523 /* set transfer mode to complete */
524 buf[0] = 0x80;
525 nxt200x_writebytes(state, 0x2B, buf,1);
526
527 return 0;
528 };
529
530 static int nxt200x_setup_frontend_parameters (struct dvb_frontend* fe,
531 struct dvb_frontend_parameters *p)
532 {
533 struct nxt200x_state* state = fe->demodulator_priv;
534 u8 buf[5];
535
536 /* stop the micro first */
537 nxt200x_microcontroller_stop(state);
538
539 if (state->demod_chip == NXT2004) {
540 /* make sure demod is set to digital */
541 buf[0] = 0x04;
542 nxt200x_writebytes(state, 0x14, buf, 1);
543 buf[0] = 0x00;
544 nxt200x_writebytes(state, 0x17, buf, 1);
545 }
546
547 /* set additional params */
548 switch (p->u.vsb.modulation) {
549 case QAM_64:
550 case QAM_256:
551 /* Set punctured clock for QAM */
552 /* This is just a guess since I am unable to test it */
553 if (state->config->set_ts_params)
554 state->config->set_ts_params(fe, 1);
555 break;
556 case VSB_8:
557 /* Set non-punctured clock for VSB */
558 if (state->config->set_ts_params)
559 state->config->set_ts_params(fe, 0);
560 break;
561 default:
562 return -EINVAL;
563 break;
564 }
565
566 if (fe->ops.tuner_ops.calc_regs) {
567 /* get tuning information */
568 fe->ops.tuner_ops.calc_regs(fe, p, buf, 5);
569
570 /* write frequency information */
571 nxt200x_writetuner(state, buf);
572 }
573
574 /* reset the agc now that tuning has been completed */
575 nxt200x_agc_reset(state);
576
577 /* set target power level */
578 switch (p->u.vsb.modulation) {
579 case QAM_64:
580 case QAM_256:
581 buf[0] = 0x74;
582 break;
583 case VSB_8:
584 buf[0] = 0x70;
585 break;
586 default:
587 return -EINVAL;
588 break;
589 }
590 nxt200x_writebytes(state, 0x42, buf, 1);
591
592 /* configure sdm */
593 switch (state->demod_chip) {
594 case NXT2002:
595 buf[0] = 0x87;
596 break;
597 case NXT2004:
598 buf[0] = 0x07;
599 break;
600 default:
601 return -EINVAL;
602 break;
603 }
604 nxt200x_writebytes(state, 0x57, buf, 1);
605
606 /* write sdm1 input */
607 buf[0] = 0x10;
608 buf[1] = 0x00;
609 switch (state->demod_chip) {
610 case NXT2002:
611 nxt200x_writereg_multibyte(state, 0x58, buf, 2);
612 break;
613 case NXT2004:
614 nxt200x_writebytes(state, 0x58, buf, 2);
615 break;
616 default:
617 return -EINVAL;
618 break;
619 }
620
621 /* write sdmx input */
622 switch (p->u.vsb.modulation) {
623 case QAM_64:
624 buf[0] = 0x68;
625 break;
626 case QAM_256:
627 buf[0] = 0x64;
628 break;
629 case VSB_8:
630 buf[0] = 0x60;
631 break;
632 default:
633 return -EINVAL;
634 break;
635 }
636 buf[1] = 0x00;
637 switch (state->demod_chip) {
638 case NXT2002:
639 nxt200x_writereg_multibyte(state, 0x5C, buf, 2);
640 break;
641 case NXT2004:
642 nxt200x_writebytes(state, 0x5C, buf, 2);
643 break;
644 default:
645 return -EINVAL;
646 break;
647 }
648
649 /* write adc power lpf fc */
650 buf[0] = 0x05;
651 nxt200x_writebytes(state, 0x43, buf, 1);
652
653 if (state->demod_chip == NXT2004) {
654 /* write ??? */
655 buf[0] = 0x00;
656 buf[1] = 0x00;
657 nxt200x_writebytes(state, 0x46, buf, 2);
658 }
659
660 /* write accumulator2 input */
661 buf[0] = 0x80;
662 buf[1] = 0x00;
663 switch (state->demod_chip) {
664 case NXT2002:
665 nxt200x_writereg_multibyte(state, 0x4B, buf, 2);
666 break;
667 case NXT2004:
668 nxt200x_writebytes(state, 0x4B, buf, 2);
669 break;
670 default:
671 return -EINVAL;
672 break;
673 }
674
675 /* write kg1 */
676 buf[0] = 0x00;
677 nxt200x_writebytes(state, 0x4D, buf, 1);
678
679 /* write sdm12 lpf fc */
680 buf[0] = 0x44;
681 nxt200x_writebytes(state, 0x55, buf, 1);
682
683 /* write agc control reg */
684 buf[0] = 0x04;
685 nxt200x_writebytes(state, 0x41, buf, 1);
686
687 if (state->demod_chip == NXT2004) {
688 nxt200x_readreg_multibyte(state, 0x80, buf, 1);
689 buf[0] = 0x24;
690 nxt200x_writereg_multibyte(state, 0x80, buf, 1);
691
692 /* soft reset? */
693 nxt200x_readreg_multibyte(state, 0x08, buf, 1);
694 buf[0] = 0x10;
695 nxt200x_writereg_multibyte(state, 0x08, buf, 1);
696 nxt200x_readreg_multibyte(state, 0x08, buf, 1);
697 buf[0] = 0x00;
698 nxt200x_writereg_multibyte(state, 0x08, buf, 1);
699
700 nxt200x_readreg_multibyte(state, 0x80, buf, 1);
701 buf[0] = 0x04;
702 nxt200x_writereg_multibyte(state, 0x80, buf, 1);
703 buf[0] = 0x00;
704 nxt200x_writereg_multibyte(state, 0x81, buf, 1);
705 buf[0] = 0x80; buf[1] = 0x00; buf[2] = 0x00;
706 nxt200x_writereg_multibyte(state, 0x82, buf, 3);
707 nxt200x_readreg_multibyte(state, 0x88, buf, 1);
708 buf[0] = 0x11;
709 nxt200x_writereg_multibyte(state, 0x88, buf, 1);
710 nxt200x_readreg_multibyte(state, 0x80, buf, 1);
711 buf[0] = 0x44;
712 nxt200x_writereg_multibyte(state, 0x80, buf, 1);
713 }
714
715 /* write agc ucgp0 */
716 switch (p->u.vsb.modulation) {
717 case QAM_64:
718 buf[0] = 0x02;
719 break;
720 case QAM_256:
721 buf[0] = 0x03;
722 break;
723 case VSB_8:
724 buf[0] = 0x00;
725 break;
726 default:
727 return -EINVAL;
728 break;
729 }
730 nxt200x_writebytes(state, 0x30, buf, 1);
731
732 /* write agc control reg */
733 buf[0] = 0x00;
734 nxt200x_writebytes(state, 0x41, buf, 1);
735
736 /* write accumulator2 input */
737 buf[0] = 0x80;
738 buf[1] = 0x00;
739 switch (state->demod_chip) {
740 case NXT2002:
741 nxt200x_writereg_multibyte(state, 0x49, buf, 2);
742 nxt200x_writereg_multibyte(state, 0x4B, buf, 2);
743 break;
744 case NXT2004:
745 nxt200x_writebytes(state, 0x49, buf, 2);
746 nxt200x_writebytes(state, 0x4B, buf, 2);
747 break;
748 default:
749 return -EINVAL;
750 break;
751 }
752
753 /* write agc control reg */
754 buf[0] = 0x04;
755 nxt200x_writebytes(state, 0x41, buf, 1);
756
757 nxt200x_microcontroller_start(state);
758
759 if (state->demod_chip == NXT2004) {
760 nxt2004_microcontroller_init(state);
761
762 /* ???? */
763 buf[0] = 0xF0;
764 buf[1] = 0x00;
765 nxt200x_writebytes(state, 0x5C, buf, 2);
766 }
767
768 /* adjacent channel detection should be done here, but I don't
769 have any stations with this need so I cannot test it */
770
771 return 0;
772 }
773
774 static int nxt200x_read_status(struct dvb_frontend* fe, fe_status_t* status)
775 {
776 struct nxt200x_state* state = fe->demodulator_priv;
777 u8 lock;
778 nxt200x_readbytes(state, 0x31, &lock, 1);
779
780 *status = 0;
781 if (lock & 0x20) {
782 *status |= FE_HAS_SIGNAL;
783 *status |= FE_HAS_CARRIER;
784 *status |= FE_HAS_VITERBI;
785 *status |= FE_HAS_SYNC;
786 *status |= FE_HAS_LOCK;
787 }
788 return 0;
789 }
790
791 static int nxt200x_read_ber(struct dvb_frontend* fe, u32* ber)
792 {
793 struct nxt200x_state* state = fe->demodulator_priv;
794 u8 b[3];
795
796 nxt200x_readreg_multibyte(state, 0xE6, b, 3);
797
798 *ber = ((b[0] << 8) + b[1]) * 8;
799
800 return 0;
801 }
802
803 static int nxt200x_read_signal_strength(struct dvb_frontend* fe, u16* strength)
804 {
805 struct nxt200x_state* state = fe->demodulator_priv;
806 u8 b[2];
807 u16 temp = 0;
808
809 /* setup to read cluster variance */
810 b[0] = 0x00;
811 nxt200x_writebytes(state, 0xA1, b, 1);
812
813 /* get multreg val */
814 nxt200x_readreg_multibyte(state, 0xA6, b, 2);
815
816 temp = (b[0] << 8) | b[1];
817 *strength = ((0x7FFF - temp) & 0x0FFF) * 16;
818
819 return 0;
820 }
821
822 static int nxt200x_read_snr(struct dvb_frontend* fe, u16* snr)
823 {
824
825 struct nxt200x_state* state = fe->demodulator_priv;
826 u8 b[2];
827 u16 temp = 0, temp2;
828 u32 snrdb = 0;
829
830 /* setup to read cluster variance */
831 b[0] = 0x00;
832 nxt200x_writebytes(state, 0xA1, b, 1);
833
834 /* get multreg val from 0xA6 */
835 nxt200x_readreg_multibyte(state, 0xA6, b, 2);
836
837 temp = (b[0] << 8) | b[1];
838 temp2 = 0x7FFF - temp;
839
840 /* snr will be in db */
841 if (temp2 > 0x7F00)
842 snrdb = 1000*24 + ( 1000*(30-24) * ( temp2 - 0x7F00 ) / ( 0x7FFF - 0x7F00 ) );
843 else if (temp2 > 0x7EC0)
844 snrdb = 1000*18 + ( 1000*(24-18) * ( temp2 - 0x7EC0 ) / ( 0x7F00 - 0x7EC0 ) );
845 else if (temp2 > 0x7C00)
846 snrdb = 1000*12 + ( 1000*(18-12) * ( temp2 - 0x7C00 ) / ( 0x7EC0 - 0x7C00 ) );
847 else
848 snrdb = 1000*0 + ( 1000*(12-0) * ( temp2 - 0 ) / ( 0x7C00 - 0 ) );
849
850 /* the value reported back from the frontend will be FFFF=32db 0000=0db */
851 *snr = snrdb * (0xFFFF/32000);
852
853 return 0;
854 }
855
856 static int nxt200x_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
857 {
858 struct nxt200x_state* state = fe->demodulator_priv;
859 u8 b[3];
860
861 nxt200x_readreg_multibyte(state, 0xE6, b, 3);
862 *ucblocks = b[2];
863
864 return 0;
865 }
866
867 static int nxt200x_sleep(struct dvb_frontend* fe)
868 {
869 return 0;
870 }
871
872 static int nxt2002_init(struct dvb_frontend* fe)
873 {
874 struct nxt200x_state* state = fe->demodulator_priv;
875 const struct firmware *fw;
876 int ret;
877 u8 buf[2];
878
879 /* request the firmware, this will block until someone uploads it */
880 printk("nxt2002: Waiting for firmware upload (%s)...\n", NXT2002_DEFAULT_FIRMWARE);
881 ret = request_firmware(&fw, NXT2002_DEFAULT_FIRMWARE, &state->i2c->dev);
882 printk("nxt2002: Waiting for firmware upload(2)...\n");
883 if (ret) {
884 printk("nxt2002: No firmware uploaded (timeout or file not found?)\n");
885 return ret;
886 }
887
888 ret = nxt2002_load_firmware(fe, fw);
889 release_firmware(fw);
890 if (ret) {
891 printk("nxt2002: Writing firmware to device failed\n");
892 return ret;
893 }
894 printk("nxt2002: Firmware upload complete\n");
895
896 /* Put the micro into reset */
897 nxt200x_microcontroller_stop(state);
898
899 /* ensure transfer is complete */
900 buf[0]=0x00;
901 nxt200x_writebytes(state, 0x2B, buf, 1);
902
903 /* Put the micro into reset for real this time */
904 nxt200x_microcontroller_stop(state);
905
906 /* soft reset everything (agc,frontend,eq,fec)*/
907 buf[0] = 0x0F;
908 nxt200x_writebytes(state, 0x08, buf, 1);
909 buf[0] = 0x00;
910 nxt200x_writebytes(state, 0x08, buf, 1);
911
912 /* write agc sdm configure */
913 buf[0] = 0xF1;
914 nxt200x_writebytes(state, 0x57, buf, 1);
915
916 /* write mod output format */
917 buf[0] = 0x20;
918 nxt200x_writebytes(state, 0x09, buf, 1);
919
920 /* write fec mpeg mode */
921 buf[0] = 0x7E;
922 buf[1] = 0x00;
923 nxt200x_writebytes(state, 0xE9, buf, 2);
924
925 /* write mux selection */
926 buf[0] = 0x00;
927 nxt200x_writebytes(state, 0xCC, buf, 1);
928
929 return 0;
930 }
931
932 static int nxt2004_init(struct dvb_frontend* fe)
933 {
934 struct nxt200x_state* state = fe->demodulator_priv;
935 const struct firmware *fw;
936 int ret;
937 u8 buf[3];
938
939 /* ??? */
940 buf[0]=0x00;
941 nxt200x_writebytes(state, 0x1E, buf, 1);
942
943 /* request the firmware, this will block until someone uploads it */
944 printk("nxt2004: Waiting for firmware upload (%s)...\n", NXT2004_DEFAULT_FIRMWARE);
945 ret = request_firmware(&fw, NXT2004_DEFAULT_FIRMWARE, &state->i2c->dev);
946 printk("nxt2004: Waiting for firmware upload(2)...\n");
947 if (ret) {
948 printk("nxt2004: No firmware uploaded (timeout or file not found?)\n");
949 return ret;
950 }
951
952 ret = nxt2004_load_firmware(fe, fw);
953 release_firmware(fw);
954 if (ret) {
955 printk("nxt2004: Writing firmware to device failed\n");
956 return ret;
957 }
958 printk("nxt2004: Firmware upload complete\n");
959
960 /* ensure transfer is complete */
961 buf[0] = 0x01;
962 nxt200x_writebytes(state, 0x19, buf, 1);
963
964 nxt2004_microcontroller_init(state);
965 nxt200x_microcontroller_stop(state);
966 nxt200x_microcontroller_stop(state);
967 nxt2004_microcontroller_init(state);
968 nxt200x_microcontroller_stop(state);
969
970 /* soft reset everything (agc,frontend,eq,fec)*/
971 buf[0] = 0xFF;
972 nxt200x_writereg_multibyte(state, 0x08, buf, 1);
973 buf[0] = 0x00;
974 nxt200x_writereg_multibyte(state, 0x08, buf, 1);
975
976 /* write agc sdm configure */
977 buf[0] = 0xD7;
978 nxt200x_writebytes(state, 0x57, buf, 1);
979
980 /* ???*/
981 buf[0] = 0x07;
982 buf[1] = 0xfe;
983 nxt200x_writebytes(state, 0x35, buf, 2);
984 buf[0] = 0x12;
985 nxt200x_writebytes(state, 0x34, buf, 1);
986 buf[0] = 0x80;
987 nxt200x_writebytes(state, 0x21, buf, 1);
988
989 /* ???*/
990 buf[0] = 0x21;
991 nxt200x_writebytes(state, 0x0A, buf, 1);
992
993 /* ???*/
994 buf[0] = 0x01;
995 nxt200x_writereg_multibyte(state, 0x80, buf, 1);
996
997 /* write fec mpeg mode */
998 buf[0] = 0x7E;
999 buf[1] = 0x00;
1000 nxt200x_writebytes(state, 0xE9, buf, 2);
1001
1002 /* write mux selection */
1003 buf[0] = 0x00;
1004 nxt200x_writebytes(state, 0xCC, buf, 1);
1005
1006 /* ???*/
1007 nxt200x_readreg_multibyte(state, 0x80, buf, 1);
1008 buf[0] = 0x00;
1009 nxt200x_writereg_multibyte(state, 0x80, buf, 1);
1010
1011 /* soft reset? */
1012 nxt200x_readreg_multibyte(state, 0x08, buf, 1);
1013 buf[0] = 0x10;
1014 nxt200x_writereg_multibyte(state, 0x08, buf, 1);
1015 nxt200x_readreg_multibyte(state, 0x08, buf, 1);
1016 buf[0] = 0x00;
1017 nxt200x_writereg_multibyte(state, 0x08, buf, 1);
1018
1019 /* ???*/
1020 nxt200x_readreg_multibyte(state, 0x80, buf, 1);
1021 buf[0] = 0x01;
1022 nxt200x_writereg_multibyte(state, 0x80, buf, 1);
1023 buf[0] = 0x70;
1024 nxt200x_writereg_multibyte(state, 0x81, buf, 1);
1025 buf[0] = 0x31; buf[1] = 0x5E; buf[2] = 0x66;
1026 nxt200x_writereg_multibyte(state, 0x82, buf, 3);
1027
1028 nxt200x_readreg_multibyte(state, 0x88, buf, 1);
1029 buf[0] = 0x11;
1030 nxt200x_writereg_multibyte(state, 0x88, buf, 1);
1031 nxt200x_readreg_multibyte(state, 0x80, buf, 1);
1032 buf[0] = 0x40;
1033 nxt200x_writereg_multibyte(state, 0x80, buf, 1);
1034
1035 nxt200x_readbytes(state, 0x10, buf, 1);
1036 buf[0] = 0x10;
1037 nxt200x_writebytes(state, 0x10, buf, 1);
1038 nxt200x_readbytes(state, 0x0A, buf, 1);
1039 buf[0] = 0x21;
1040 nxt200x_writebytes(state, 0x0A, buf, 1);
1041
1042 nxt2004_microcontroller_init(state);
1043
1044 buf[0] = 0x21;
1045 nxt200x_writebytes(state, 0x0A, buf, 1);
1046 buf[0] = 0x7E;
1047 nxt200x_writebytes(state, 0xE9, buf, 1);
1048 buf[0] = 0x00;
1049 nxt200x_writebytes(state, 0xEA, buf, 1);
1050
1051 nxt200x_readreg_multibyte(state, 0x80, buf, 1);
1052 buf[0] = 0x00;
1053 nxt200x_writereg_multibyte(state, 0x80, buf, 1);
1054 nxt200x_readreg_multibyte(state, 0x80, buf, 1);
1055 buf[0] = 0x00;
1056 nxt200x_writereg_multibyte(state, 0x80, buf, 1);
1057
1058 /* soft reset? */
1059 nxt200x_readreg_multibyte(state, 0x08, buf, 1);
1060 buf[0] = 0x10;
1061 nxt200x_writereg_multibyte(state, 0x08, buf, 1);
1062 nxt200x_readreg_multibyte(state, 0x08, buf, 1);
1063 buf[0] = 0x00;
1064 nxt200x_writereg_multibyte(state, 0x08, buf, 1);
1065
1066 nxt200x_readreg_multibyte(state, 0x80, buf, 1);
1067 buf[0] = 0x04;
1068 nxt200x_writereg_multibyte(state, 0x80, buf, 1);
1069 buf[0] = 0x00;
1070 nxt200x_writereg_multibyte(state, 0x81, buf, 1);
1071 buf[0] = 0x80; buf[1] = 0x00; buf[2] = 0x00;
1072 nxt200x_writereg_multibyte(state, 0x82, buf, 3);
1073
1074 nxt200x_readreg_multibyte(state, 0x88, buf, 1);
1075 buf[0] = 0x11;
1076 nxt200x_writereg_multibyte(state, 0x88, buf, 1);
1077
1078 nxt200x_readreg_multibyte(state, 0x80, buf, 1);
1079 buf[0] = 0x44;
1080 nxt200x_writereg_multibyte(state, 0x80, buf, 1);
1081
1082 /* initialize tuner */
1083 nxt200x_readbytes(state, 0x10, buf, 1);
1084 buf[0] = 0x12;
1085 nxt200x_writebytes(state, 0x10, buf, 1);
1086 buf[0] = 0x04;
1087 nxt200x_writebytes(state, 0x13, buf, 1);
1088 buf[0] = 0x00;
1089 nxt200x_writebytes(state, 0x16, buf, 1);
1090 buf[0] = 0x04;
1091 nxt200x_writebytes(state, 0x14, buf, 1);
1092 buf[0] = 0x00;
1093 nxt200x_writebytes(state, 0x14, buf, 1);
1094 nxt200x_writebytes(state, 0x17, buf, 1);
1095 nxt200x_writebytes(state, 0x14, buf, 1);
1096 nxt200x_writebytes(state, 0x17, buf, 1);
1097
1098 return 0;
1099 }
1100
1101 static int nxt200x_init(struct dvb_frontend* fe)
1102 {
1103 struct nxt200x_state* state = fe->demodulator_priv;
1104 int ret = 0;
1105
1106 if (!state->initialised) {
1107 switch (state->demod_chip) {
1108 case NXT2002:
1109 ret = nxt2002_init(fe);
1110 break;
1111 case NXT2004:
1112 ret = nxt2004_init(fe);
1113 break;
1114 default:
1115 return -EINVAL;
1116 break;
1117 }
1118 state->initialised = 1;
1119 }
1120 return ret;
1121 }
1122
1123 static int nxt200x_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings)
1124 {
1125 fesettings->min_delay_ms = 500;
1126 fesettings->step_size = 0;
1127 fesettings->max_drift = 0;
1128 return 0;
1129 }
1130
1131 static void nxt200x_release(struct dvb_frontend* fe)
1132 {
1133 struct nxt200x_state* state = fe->demodulator_priv;
1134 kfree(state);
1135 }
1136
1137 static struct dvb_frontend_ops nxt200x_ops;
1138
1139 struct dvb_frontend* nxt200x_attach(const struct nxt200x_config* config,
1140 struct i2c_adapter* i2c)
1141 {
1142 struct nxt200x_state* state = NULL;
1143 u8 buf [] = {0,0,0,0,0};
1144
1145 /* allocate memory for the internal state */
1146 state = kzalloc(sizeof(struct nxt200x_state), GFP_KERNEL);
1147 if (state == NULL)
1148 goto error;
1149
1150 /* setup the state */
1151 state->config = config;
1152 state->i2c = i2c;
1153 state->initialised = 0;
1154
1155 /* read card id */
1156 nxt200x_readbytes(state, 0x00, buf, 5);
1157 dprintk("NXT info: %02X %02X %02X %02X %02X\n",
1158 buf[0], buf[1], buf[2], buf[3], buf[4]);
1159
1160 /* set demod chip */
1161 switch (buf[0]) {
1162 case 0x04:
1163 state->demod_chip = NXT2002;
1164 printk("nxt200x: NXT2002 Detected\n");
1165 break;
1166 case 0x05:
1167 state->demod_chip = NXT2004;
1168 printk("nxt200x: NXT2004 Detected\n");
1169 break;
1170 default:
1171 goto error;
1172 }
1173
1174 /* make sure demod chip is supported */
1175 switch (state->demod_chip) {
1176 case NXT2002:
1177 if (buf[0] != 0x04) goto error; /* device id */
1178 if (buf[1] != 0x02) goto error; /* fab id */
1179 if (buf[2] != 0x11) goto error; /* month */
1180 if (buf[3] != 0x20) goto error; /* year msb */
1181 if (buf[4] != 0x00) goto error; /* year lsb */
1182 break;
1183 case NXT2004:
1184 if (buf[0] != 0x05) goto error; /* device id */
1185 break;
1186 default:
1187 goto error;
1188 }
1189
1190 /* create dvb_frontend */
1191 memcpy(&state->frontend.ops, &nxt200x_ops, sizeof(struct dvb_frontend_ops));
1192 state->frontend.demodulator_priv = state;
1193 return &state->frontend;
1194
1195 error:
1196 kfree(state);
1197 printk("Unknown/Unsupported NXT chip: %02X %02X %02X %02X %02X\n",
1198 buf[0], buf[1], buf[2], buf[3], buf[4]);
1199 return NULL;
1200 }
1201
1202 static struct dvb_frontend_ops nxt200x_ops = {
1203
1204 .info = {
1205 .name = "Nextwave NXT200X VSB/QAM frontend",
1206 .type = FE_ATSC,
1207 .frequency_min = 54000000,
1208 .frequency_max = 860000000,
1209 .frequency_stepsize = 166666, /* stepsize is just a guess */
1210 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
1211 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
1212 FE_CAN_8VSB | FE_CAN_QAM_64 | FE_CAN_QAM_256
1213 },
1214
1215 .release = nxt200x_release,
1216
1217 .init = nxt200x_init,
1218 .sleep = nxt200x_sleep,
1219
1220 .set_frontend = nxt200x_setup_frontend_parameters,
1221 .get_tune_settings = nxt200x_get_tune_settings,
1222
1223 .read_status = nxt200x_read_status,
1224 .read_ber = nxt200x_read_ber,
1225 .read_signal_strength = nxt200x_read_signal_strength,
1226 .read_snr = nxt200x_read_snr,
1227 .read_ucblocks = nxt200x_read_ucblocks,
1228 };
1229
1230 module_param(debug, int, 0644);
1231 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
1232
1233 MODULE_DESCRIPTION("NXT200X (ATSC 8VSB & ITU-T J.83 AnnexB 64/256 QAM) Demodulator Driver");
1234 MODULE_AUTHOR("Kirk Lapray, Michael Krufky, Jean-Francois Thibert, and Taylor Jacob");
1235 MODULE_LICENSE("GPL");
1236
1237 EXPORT_SYMBOL(nxt200x_attach);
1238
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