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-rw-r--r--drivers/media/dvb/frontends/nxt2002.c706
1 files changed, 0 insertions, 706 deletions
diff --git a/drivers/media/dvb/frontends/nxt2002.c b/drivers/media/dvb/frontends/nxt2002.c
deleted file mode 100644
index 4f263e65ba14..000000000000
--- a/drivers/media/dvb/frontends/nxt2002.c
+++ /dev/null
@@ -1,706 +0,0 @@
1/*
2 Support for B2C2/BBTI Technisat Air2PC - ATSC
3
4 Copyright (C) 2004 Taylor Jacob <rtjacob@earthlink.net>
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19
20*/
21
22/*
23 * This driver needs external firmware. Please use the command
24 * "<kerneldir>/Documentation/dvb/get_dvb_firmware nxt2002" to
25 * download/extract it, and then copy it to /usr/lib/hotplug/firmware
26 * or /lib/firmware (depending on configuration of firmware hotplug).
27 */
28#define NXT2002_DEFAULT_FIRMWARE "dvb-fe-nxt2002.fw"
29#define CRC_CCIT_MASK 0x1021
30
31#include <linux/init.h>
32#include <linux/module.h>
33#include <linux/moduleparam.h>
34#include <linux/device.h>
35#include <linux/firmware.h>
36#include <linux/string.h>
37#include <linux/slab.h>
38
39#include "dvb_frontend.h"
40#include "nxt2002.h"
41
42struct nxt2002_state {
43
44 struct i2c_adapter* i2c;
45 struct dvb_frontend_ops ops;
46 const struct nxt2002_config* config;
47 struct dvb_frontend frontend;
48
49 /* demodulator private data */
50 u8 initialised:1;
51};
52
53static int debug;
54#define dprintk(args...) \
55 do { \
56 if (debug) printk(KERN_DEBUG "nxt2002: " args); \
57 } while (0)
58
59static int i2c_writebytes (struct nxt2002_state* state, u8 reg, u8 *buf, u8 len)
60{
61 /* probbably a much better way or doing this */
62 u8 buf2 [256],x;
63 int err;
64 struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf2, .len = len + 1 };
65
66 buf2[0] = reg;
67 for (x = 0 ; x < len ; x++)
68 buf2[x+1] = buf[x];
69
70 if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
71 printk ("%s: i2c write error (addr %02x, err == %i)\n",
72 __FUNCTION__, state->config->demod_address, err);
73 return -EREMOTEIO;
74 }
75
76 return 0;
77}
78
79static u8 i2c_readbytes (struct nxt2002_state* state, u8 reg, u8* buf, u8 len)
80{
81 u8 reg2 [] = { reg };
82
83 struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = reg2, .len = 1 },
84 { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = buf, .len = len } };
85
86 int err;
87
88 if ((err = i2c_transfer (state->i2c, msg, 2)) != 2) {
89 printk ("%s: i2c read error (addr %02x, err == %i)\n",
90 __FUNCTION__, state->config->demod_address, err);
91 return -EREMOTEIO;
92 }
93
94 return 0;
95}
96
97static u16 nxt2002_crc(u16 crc, u8 c)
98{
99
100 u8 i;
101 u16 input = (u16) c & 0xFF;
102
103 input<<=8;
104 for(i=0 ;i<8 ;i++) {
105 if((crc ^ input) & 0x8000)
106 crc=(crc<<1)^CRC_CCIT_MASK;
107 else
108 crc<<=1;
109 input<<=1;
110 }
111 return crc;
112}
113
114static int nxt2002_writereg_multibyte (struct nxt2002_state* state, u8 reg, u8* data, u8 len)
115{
116 u8 buf;
117 dprintk("%s\n", __FUNCTION__);
118
119 /* set multi register length */
120 i2c_writebytes(state,0x34,&len,1);
121
122 /* set mutli register register */
123 i2c_writebytes(state,0x35,&reg,1);
124
125 /* send the actual data */
126 i2c_writebytes(state,0x36,data,len);
127
128 /* toggle the multireg write bit*/
129 buf = 0x02;
130 i2c_writebytes(state,0x21,&buf,1);
131
132 i2c_readbytes(state,0x21,&buf,1);
133
134 if ((buf & 0x02) == 0)
135 return 0;
136
137 dprintk("Error writing multireg register %02X\n",reg);
138
139 return 0;
140}
141
142static int nxt2002_readreg_multibyte (struct nxt2002_state* state, u8 reg, u8* data, u8 len)
143{
144 u8 len2;
145 dprintk("%s\n", __FUNCTION__);
146
147 /* set multi register length */
148 len2 = len & 0x80;
149 i2c_writebytes(state,0x34,&len2,1);
150
151 /* set mutli register register */
152 i2c_writebytes(state,0x35,&reg,1);
153
154 /* send the actual data */
155 i2c_readbytes(state,reg,data,len);
156
157 return 0;
158}
159
160static void nxt2002_microcontroller_stop (struct nxt2002_state* state)
161{
162 u8 buf[2],counter = 0;
163 dprintk("%s\n", __FUNCTION__);
164
165 buf[0] = 0x80;
166 i2c_writebytes(state,0x22,buf,1);
167
168 while (counter < 20) {
169 i2c_readbytes(state,0x31,buf,1);
170 if (buf[0] & 0x40)
171 return;
172 msleep(10);
173 counter++;
174 }
175
176 dprintk("Timeout waiting for micro to stop.. This is ok after firmware upload\n");
177 return;
178}
179
180static void nxt2002_microcontroller_start (struct nxt2002_state* state)
181{
182 u8 buf;
183 dprintk("%s\n", __FUNCTION__);
184
185 buf = 0x00;
186 i2c_writebytes(state,0x22,&buf,1);
187}
188
189static int nxt2002_writetuner (struct nxt2002_state* state, u8* data)
190{
191 u8 buf,count = 0;
192
193 dprintk("Tuner Bytes: %02X %02X %02X %02X\n",data[0],data[1],data[2],data[3]);
194
195 dprintk("%s\n", __FUNCTION__);
196 /* stop the micro first */
197 nxt2002_microcontroller_stop(state);
198
199 /* set the i2c transfer speed to the tuner */
200 buf = 0x03;
201 i2c_writebytes(state,0x20,&buf,1);
202
203 /* setup to transfer 4 bytes via i2c */
204 buf = 0x04;
205 i2c_writebytes(state,0x34,&buf,1);
206
207 /* write actual tuner bytes */
208 i2c_writebytes(state,0x36,data,4);
209
210 /* set tuner i2c address */
211 buf = 0xC2;
212 i2c_writebytes(state,0x35,&buf,1);
213
214 /* write UC Opmode to begin transfer */
215 buf = 0x80;
216 i2c_writebytes(state,0x21,&buf,1);
217
218 while (count < 20) {
219 i2c_readbytes(state,0x21,&buf,1);
220 if ((buf & 0x80)== 0x00)
221 return 0;
222 msleep(100);
223 count++;
224 }
225
226 printk("nxt2002: timeout error writing tuner\n");
227 return 0;
228}
229
230static void nxt2002_agc_reset(struct nxt2002_state* state)
231{
232 u8 buf;
233 dprintk("%s\n", __FUNCTION__);
234
235 buf = 0x08;
236 i2c_writebytes(state,0x08,&buf,1);
237
238 buf = 0x00;
239 i2c_writebytes(state,0x08,&buf,1);
240
241 return;
242}
243
244static int nxt2002_load_firmware (struct dvb_frontend* fe, const struct firmware *fw)
245{
246
247 struct nxt2002_state* state = fe->demodulator_priv;
248 u8 buf[256],written = 0,chunkpos = 0;
249 u16 rambase,position,crc = 0;
250
251 dprintk("%s\n", __FUNCTION__);
252 dprintk("Firmware is %zu bytes\n",fw->size);
253
254 /* Get the RAM base for this nxt2002 */
255 i2c_readbytes(state,0x10,buf,1);
256
257 if (buf[0] & 0x10)
258 rambase = 0x1000;
259 else
260 rambase = 0x0000;
261
262 dprintk("rambase on this nxt2002 is %04X\n",rambase);
263
264 /* Hold the micro in reset while loading firmware */
265 buf[0] = 0x80;
266 i2c_writebytes(state,0x2B,buf,1);
267
268 for (position = 0; position < fw->size ; position++) {
269 if (written == 0) {
270 crc = 0;
271 chunkpos = 0x28;
272 buf[0] = ((rambase + position) >> 8);
273 buf[1] = (rambase + position) & 0xFF;
274 buf[2] = 0x81;
275 /* write starting address */
276 i2c_writebytes(state,0x29,buf,3);
277 }
278 written++;
279 chunkpos++;
280
281 if ((written % 4) == 0)
282 i2c_writebytes(state,chunkpos,&fw->data[position-3],4);
283
284 crc = nxt2002_crc(crc,fw->data[position]);
285
286 if ((written == 255) || (position+1 == fw->size)) {
287 /* write remaining bytes of firmware */
288 i2c_writebytes(state, chunkpos+4-(written %4),
289 &fw->data[position-(written %4) + 1],
290 written %4);
291 buf[0] = crc << 8;
292 buf[1] = crc & 0xFF;
293
294 /* write crc */
295 i2c_writebytes(state,0x2C,buf,2);
296
297 /* do a read to stop things */
298 i2c_readbytes(state,0x2A,buf,1);
299
300 /* set transfer mode to complete */
301 buf[0] = 0x80;
302 i2c_writebytes(state,0x2B,buf,1);
303
304 written = 0;
305 }
306 }
307
308 printk ("done.\n");
309 return 0;
310};
311
312static int nxt2002_setup_frontend_parameters (struct dvb_frontend* fe,
313 struct dvb_frontend_parameters *p)
314{
315 struct nxt2002_state* state = fe->demodulator_priv;
316 u32 freq = 0;
317 u16 tunerfreq = 0;
318 u8 buf[4];
319
320 freq = 44000 + ( p->frequency / 1000 );
321
322 dprintk("freq = %d p->frequency = %d\n",freq,p->frequency);
323
324 tunerfreq = freq * 24/4000;
325
326 buf[0] = (tunerfreq >> 8) & 0x7F;
327 buf[1] = (tunerfreq & 0xFF);
328
329 if (p->frequency <= 214000000) {
330 buf[2] = 0x84 + (0x06 << 3);
331 buf[3] = (p->frequency <= 172000000) ? 0x01 : 0x02;
332 } else if (p->frequency <= 721000000) {
333 buf[2] = 0x84 + (0x07 << 3);
334 buf[3] = (p->frequency <= 467000000) ? 0x02 : 0x08;
335 } else if (p->frequency <= 841000000) {
336 buf[2] = 0x84 + (0x0E << 3);
337 buf[3] = 0x08;
338 } else {
339 buf[2] = 0x84 + (0x0F << 3);
340 buf[3] = 0x02;
341 }
342
343 /* write frequency information */
344 nxt2002_writetuner(state,buf);
345
346 /* reset the agc now that tuning has been completed */
347 nxt2002_agc_reset(state);
348
349 /* set target power level */
350 switch (p->u.vsb.modulation) {
351 case QAM_64:
352 case QAM_256:
353 buf[0] = 0x74;
354 break;
355 case VSB_8:
356 buf[0] = 0x70;
357 break;
358 default:
359 return -EINVAL;
360 break;
361 }
362 i2c_writebytes(state,0x42,buf,1);
363
364 /* configure sdm */
365 buf[0] = 0x87;
366 i2c_writebytes(state,0x57,buf,1);
367
368 /* write sdm1 input */
369 buf[0] = 0x10;
370 buf[1] = 0x00;
371 nxt2002_writereg_multibyte(state,0x58,buf,2);
372
373 /* write sdmx input */
374 switch (p->u.vsb.modulation) {
375 case QAM_64:
376 buf[0] = 0x68;
377 break;
378 case QAM_256:
379 buf[0] = 0x64;
380 break;
381 case VSB_8:
382 buf[0] = 0x60;
383 break;
384 default:
385 return -EINVAL;
386 break;
387 }
388 buf[1] = 0x00;
389 nxt2002_writereg_multibyte(state,0x5C,buf,2);
390
391 /* write adc power lpf fc */
392 buf[0] = 0x05;
393 i2c_writebytes(state,0x43,buf,1);
394
395 /* write adc power lpf fc */
396 buf[0] = 0x05;
397 i2c_writebytes(state,0x43,buf,1);
398
399 /* write accumulator2 input */
400 buf[0] = 0x80;
401 buf[1] = 0x00;
402 nxt2002_writereg_multibyte(state,0x4B,buf,2);
403
404 /* write kg1 */
405 buf[0] = 0x00;
406 i2c_writebytes(state,0x4D,buf,1);
407
408 /* write sdm12 lpf fc */
409 buf[0] = 0x44;
410 i2c_writebytes(state,0x55,buf,1);
411
412 /* write agc control reg */
413 buf[0] = 0x04;
414 i2c_writebytes(state,0x41,buf,1);
415
416 /* write agc ucgp0 */
417 switch (p->u.vsb.modulation) {
418 case QAM_64:
419 buf[0] = 0x02;
420 break;
421 case QAM_256:
422 buf[0] = 0x03;
423 break;
424 case VSB_8:
425 buf[0] = 0x00;
426 break;
427 default:
428 return -EINVAL;
429 break;
430 }
431 i2c_writebytes(state,0x30,buf,1);
432
433 /* write agc control reg */
434 buf[0] = 0x00;
435 i2c_writebytes(state,0x41,buf,1);
436
437 /* write accumulator2 input */
438 buf[0] = 0x80;
439 buf[1] = 0x00;
440 nxt2002_writereg_multibyte(state,0x49,buf,2);
441 nxt2002_writereg_multibyte(state,0x4B,buf,2);
442
443 /* write agc control reg */
444 buf[0] = 0x04;
445 i2c_writebytes(state,0x41,buf,1);
446
447 nxt2002_microcontroller_start(state);
448
449 /* adjacent channel detection should be done here, but I don't
450 have any stations with this need so I cannot test it */
451
452 return 0;
453}
454
455static int nxt2002_read_status(struct dvb_frontend* fe, fe_status_t* status)
456{
457 struct nxt2002_state* state = fe->demodulator_priv;
458 u8 lock;
459 i2c_readbytes(state,0x31,&lock,1);
460
461 *status = 0;
462 if (lock & 0x20) {
463 *status |= FE_HAS_SIGNAL;
464 *status |= FE_HAS_CARRIER;
465 *status |= FE_HAS_VITERBI;
466 *status |= FE_HAS_SYNC;
467 *status |= FE_HAS_LOCK;
468 }
469 return 0;
470}
471
472static int nxt2002_read_ber(struct dvb_frontend* fe, u32* ber)
473{
474 struct nxt2002_state* state = fe->demodulator_priv;
475 u8 b[3];
476
477 nxt2002_readreg_multibyte(state,0xE6,b,3);
478
479 *ber = ((b[0] << 8) + b[1]) * 8;
480
481 return 0;
482}
483
484static int nxt2002_read_signal_strength(struct dvb_frontend* fe, u16* strength)
485{
486 struct nxt2002_state* state = fe->demodulator_priv;
487 u8 b[2];
488 u16 temp = 0;
489
490 /* setup to read cluster variance */
491 b[0] = 0x00;
492 i2c_writebytes(state,0xA1,b,1);
493
494 /* get multreg val */
495 nxt2002_readreg_multibyte(state,0xA6,b,2);
496
497 temp = (b[0] << 8) | b[1];
498 *strength = ((0x7FFF - temp) & 0x0FFF) * 16;
499
500 return 0;
501}
502
503static int nxt2002_read_snr(struct dvb_frontend* fe, u16* snr)
504{
505
506 struct nxt2002_state* state = fe->demodulator_priv;
507 u8 b[2];
508 u16 temp = 0, temp2;
509 u32 snrdb = 0;
510
511 /* setup to read cluster variance */
512 b[0] = 0x00;
513 i2c_writebytes(state,0xA1,b,1);
514
515 /* get multreg val from 0xA6 */
516 nxt2002_readreg_multibyte(state,0xA6,b,2);
517
518 temp = (b[0] << 8) | b[1];
519 temp2 = 0x7FFF - temp;
520
521 /* snr will be in db */
522 if (temp2 > 0x7F00)
523 snrdb = 1000*24 + ( 1000*(30-24) * ( temp2 - 0x7F00 ) / ( 0x7FFF - 0x7F00 ) );
524 else if (temp2 > 0x7EC0)
525 snrdb = 1000*18 + ( 1000*(24-18) * ( temp2 - 0x7EC0 ) / ( 0x7F00 - 0x7EC0 ) );
526 else if (temp2 > 0x7C00)
527 snrdb = 1000*12 + ( 1000*(18-12) * ( temp2 - 0x7C00 ) / ( 0x7EC0 - 0x7C00 ) );
528 else
529 snrdb = 1000*0 + ( 1000*(12-0) * ( temp2 - 0 ) / ( 0x7C00 - 0 ) );
530
531 /* the value reported back from the frontend will be FFFF=32db 0000=0db */
532
533 *snr = snrdb * (0xFFFF/32000);
534
535 return 0;
536}
537
538static int nxt2002_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
539{
540 struct nxt2002_state* state = fe->demodulator_priv;
541 u8 b[3];
542
543 nxt2002_readreg_multibyte(state,0xE6,b,3);
544 *ucblocks = b[2];
545
546 return 0;
547}
548
549static int nxt2002_sleep(struct dvb_frontend* fe)
550{
551 return 0;
552}
553
554static int nxt2002_init(struct dvb_frontend* fe)
555{
556 struct nxt2002_state* state = fe->demodulator_priv;
557 const struct firmware *fw;
558 int ret;
559 u8 buf[2];
560
561 if (!state->initialised) {
562 /* request the firmware, this will block until someone uploads it */
563 printk("nxt2002: Waiting for firmware upload (%s)...\n", NXT2002_DEFAULT_FIRMWARE);
564 ret = state->config->request_firmware(fe, &fw, NXT2002_DEFAULT_FIRMWARE);
565 printk("nxt2002: Waiting for firmware upload(2)...\n");
566 if (ret) {
567 printk("nxt2002: no firmware upload (timeout or file not found?)\n");
568 return ret;
569 }
570
571 ret = nxt2002_load_firmware(fe, fw);
572 if (ret) {
573 printk("nxt2002: writing firmware to device failed\n");
574 release_firmware(fw);
575 return ret;
576 }
577 printk("nxt2002: firmware upload complete\n");
578
579 /* Put the micro into reset */
580 nxt2002_microcontroller_stop(state);
581
582 /* ensure transfer is complete */
583 buf[0]=0;
584 i2c_writebytes(state,0x2B,buf,1);
585
586 /* Put the micro into reset for real this time */
587 nxt2002_microcontroller_stop(state);
588
589 /* soft reset everything (agc,frontend,eq,fec)*/
590 buf[0] = 0x0F;
591 i2c_writebytes(state,0x08,buf,1);
592 buf[0] = 0x00;
593 i2c_writebytes(state,0x08,buf,1);
594
595 /* write agc sdm configure */
596 buf[0] = 0xF1;
597 i2c_writebytes(state,0x57,buf,1);
598
599 /* write mod output format */
600 buf[0] = 0x20;
601 i2c_writebytes(state,0x09,buf,1);
602
603 /* write fec mpeg mode */
604 buf[0] = 0x7E;
605 buf[1] = 0x00;
606 i2c_writebytes(state,0xE9,buf,2);
607
608 /* write mux selection */
609 buf[0] = 0x00;
610 i2c_writebytes(state,0xCC,buf,1);
611
612 state->initialised = 1;
613 }
614
615 return 0;
616}
617
618static int nxt2002_get_tune_settings(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* fesettings)
619{
620 fesettings->min_delay_ms = 500;
621 fesettings->step_size = 0;
622 fesettings->max_drift = 0;
623 return 0;
624}
625
626static void nxt2002_release(struct dvb_frontend* fe)
627{
628 struct nxt2002_state* state = fe->demodulator_priv;
629 kfree(state);
630}
631
632static struct dvb_frontend_ops nxt2002_ops;
633
634struct dvb_frontend* nxt2002_attach(const struct nxt2002_config* config,
635 struct i2c_adapter* i2c)
636{
637 struct nxt2002_state* state = NULL;
638 u8 buf [] = {0,0,0,0,0};
639
640 /* allocate memory for the internal state */
641 state = kmalloc(sizeof(struct nxt2002_state), GFP_KERNEL);
642 if (state == NULL) goto error;
643
644 /* setup the state */
645 state->config = config;
646 state->i2c = i2c;
647 memcpy(&state->ops, &nxt2002_ops, sizeof(struct dvb_frontend_ops));
648 state->initialised = 0;
649
650 /* Check the first 5 registers to ensure this a revision we can handle */
651
652 i2c_readbytes(state, 0x00, buf, 5);
653 if (buf[0] != 0x04) goto error; /* device id */
654 if (buf[1] != 0x02) goto error; /* fab id */
655 if (buf[2] != 0x11) goto error; /* month */
656 if (buf[3] != 0x20) goto error; /* year msb */
657 if (buf[4] != 0x00) goto error; /* year lsb */
658
659 /* create dvb_frontend */
660 state->frontend.ops = &state->ops;
661 state->frontend.demodulator_priv = state;
662 return &state->frontend;
663
664error:
665 kfree(state);
666 return NULL;
667}
668
669static struct dvb_frontend_ops nxt2002_ops = {
670
671 .info = {
672 .name = "Nextwave nxt2002 VSB/QAM frontend",
673 .type = FE_ATSC,
674 .frequency_min = 54000000,
675 .frequency_max = 860000000,
676 /* stepsize is just a guess */
677 .frequency_stepsize = 166666,
678 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
679 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
680 FE_CAN_8VSB | FE_CAN_QAM_64 | FE_CAN_QAM_256
681 },
682
683 .release = nxt2002_release,
684
685 .init = nxt2002_init,
686 .sleep = nxt2002_sleep,
687
688 .set_frontend = nxt2002_setup_frontend_parameters,
689 .get_tune_settings = nxt2002_get_tune_settings,
690
691 .read_status = nxt2002_read_status,
692 .read_ber = nxt2002_read_ber,
693 .read_signal_strength = nxt2002_read_signal_strength,
694 .read_snr = nxt2002_read_snr,
695 .read_ucblocks = nxt2002_read_ucblocks,
696
697};
698
699module_param(debug, int, 0644);
700MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
701
702MODULE_DESCRIPTION("NXT2002 ATSC (8VSB & ITU J83 AnnexB FEC QAM64/256) demodulator driver");
703MODULE_AUTHOR("Taylor Jacob");
704MODULE_LICENSE("GPL");
705
706EXPORT_SYMBOL(nxt2002_attach);
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-16 03:04:23 -0500