1 /*
2 * Support for OR51211 (pcHDTV HD-2000) - VSB
3 *
4 * Copyright (C) 2005 Kirk Lapray <kirk_lapray@bigfoot.com>
5 *
6 * Based on code from Jack Kelliher (kelliher@xmission.com)
7 * Copyright (C) 2002 & pcHDTV, inc.
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 * This driver needs external firmware. Please use the command
27 * "<kerneldir>/Documentation/dvb/get_dvb_firmware or51211" to
28 * download/extract it, and then copy it to /usr/lib/hotplug/firmware
29 * or /lib/firmware (depending on configuration of firmware hotplug).
30 */
31 #define OR51211_DEFAULT_FIRMWARE "dvb-fe-or51211.fw"
32
33 #include <linux/kernel.h>
34 #include <linux/module.h>
35 #include <linux/device.h>
36 #include <linux/firmware.h>
37 #include <linux/string.h>
38 #include <linux/slab.h>
39 #include <asm/byteorder.h>
40
41 #include "dvb_math.h"
42 #include "dvb_frontend.h"
43 #include "or51211.h"
44
45 static int debug;
46 #define dprintk(args...) \
47 do { \
48 if (debug) printk(KERN_DEBUG "or51211: " args); \
49 } while (0)
50
51 static u8 run_buf[] = {0x7f,0x01};
52 static u8 cmd_buf[] = {0x04,0x01,0x50,0x80,0x06}; // ATSC
53
54 struct or51211_state {
55
56 struct i2c_adapter* i2c;
57
58 /* Configuration settings */
59 const struct or51211_config* config;
60
61 struct dvb_frontend frontend;
62 struct bt878* bt;
63
64 /* Demodulator private data */
65 u8 initialized:1;
66 u32 snr; /* Result of last SNR claculation */
67
68 /* Tuner private data */
69 u32 current_frequency;
70 };
71
72 static int i2c_writebytes (struct or51211_state* state, u8 reg, u8 *buf,
73 int len)
74 {
75 int err;
76 struct i2c_msg msg;
77 msg.addr = reg;
78 msg.flags = 0;
79 msg.len = len;
80 msg.buf = buf;
81
82 if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
83 printk(KERN_WARNING "or51211: i2c_writebytes error "
84 "(addr %02x, err == %i)\n", reg, err);
85 return -EREMOTEIO;
86 }
87
88 return 0;
89 }
90
91 static u8 i2c_readbytes (struct or51211_state* state, u8 reg, u8* buf, int len)
92 {
93 int err;
94 struct i2c_msg msg;
95 msg.addr = reg;
96 msg.flags = I2C_M_RD;
97 msg.len = len;
98 msg.buf = buf;
99
100 if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
101 printk(KERN_WARNING "or51211: i2c_readbytes error "
102 "(addr %02x, err == %i)\n", reg, err);
103 return -EREMOTEIO;
104 }
105
106 return 0;
107 }
108
109 static int or51211_load_firmware (struct dvb_frontend* fe,
110 const struct firmware *fw)
111 {
112 struct or51211_state* state = fe->demodulator_priv;
113 u8 tudata[585];
114 int i;
115
116 dprintk("Firmware is %zd bytes\n",fw->size);
117
118 /* Get eprom data */
119 tudata[0] = 17;
120 if (i2c_writebytes(state,0x50,tudata,1)) {
121 printk(KERN_WARNING "or51211:load_firmware error eprom addr\n");
122 return -1;
123 }
124 if (i2c_readbytes(state,0x50,&tudata[145],192)) {
125 printk(KERN_WARNING "or51211: load_firmware error eprom\n");
126 return -1;
127 }
128
129 /* Create firmware buffer */
130 for (i = 0; i < 145; i++)
131 tudata[i] = fw->data[i];
132
133 for (i = 0; i < 248; i++)
134 tudata[i+337] = fw->data[145+i];
135
136 state->config->reset(fe);
137
138 if (i2c_writebytes(state,state->config->demod_address,tudata,585)) {
139 printk(KERN_WARNING "or51211: load_firmware error 1\n");
140 return -1;
141 }
142 msleep(1);
143
144 if (i2c_writebytes(state,state->config->demod_address,
145 &fw->data[393],8125)) {
146 printk(KERN_WARNING "or51211: load_firmware error 2\n");
147 return -1;
148 }
149 msleep(1);
150
151 if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) {
152 printk(KERN_WARNING "or51211: load_firmware error 3\n");
153 return -1;
154 }
155
156 /* Wait at least 5 msec */
157 msleep(10);
158 if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) {
159 printk(KERN_WARNING "or51211: load_firmware error 4\n");
160 return -1;
161 }
162 msleep(10);
163
164 printk("or51211: Done.\n");
165 return 0;
166 };
167
168 static int or51211_setmode(struct dvb_frontend* fe, int mode)
169 {
170 struct or51211_state* state = fe->demodulator_priv;
171 u8 rec_buf[14];
172
173 state->config->setmode(fe, mode);
174
175 if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) {
176 printk(KERN_WARNING "or51211: setmode error 1\n");
177 return -1;
178 }
179
180 /* Wait at least 5 msec */
181 msleep(10);
182 if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) {
183 printk(KERN_WARNING "or51211: setmode error 2\n");
184 return -1;
185 }
186
187 msleep(10);
188
189 /* Set operation mode in Receiver 1 register;
190 * type 1:
191 * data 0x50h Automatic sets receiver channel conditions
192 * Automatic NTSC rejection filter
193 * Enable MPEG serial data output
194 * MPEG2tr
195 * High tuner phase noise
196 * normal +/-150kHz Carrier acquisition range
197 */
198 if (i2c_writebytes(state,state->config->demod_address,cmd_buf,3)) {
199 printk(KERN_WARNING "or51211: setmode error 3\n");
200 return -1;
201 }
202
203 rec_buf[0] = 0x04;
204 rec_buf[1] = 0x00;
205 rec_buf[2] = 0x03;
206 rec_buf[3] = 0x00;
207 msleep(20);
208 if (i2c_writebytes(state,state->config->demod_address,rec_buf,3)) {
209 printk(KERN_WARNING "or51211: setmode error 5\n");
210 }
211 msleep(3);
212 if (i2c_readbytes(state,state->config->demod_address,&rec_buf[10],2)) {
213 printk(KERN_WARNING "or51211: setmode error 6");
214 return -1;
215 }
216 dprintk("setmode rec status %02x %02x\n",rec_buf[10],rec_buf[11]);
217
218 return 0;
219 }
220
221 static int or51211_set_parameters(struct dvb_frontend* fe,
222 struct dvb_frontend_parameters *param)
223 {
224 struct or51211_state* state = fe->demodulator_priv;
225
226 /* Change only if we are actually changing the channel */
227 if (state->current_frequency != param->frequency) {
228 if (fe->ops.tuner_ops.set_params) {
229 fe->ops.tuner_ops.set_params(fe, param);
230 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
231 }
232
233 /* Set to ATSC mode */
234 or51211_setmode(fe,0);
235
236 /* Update current frequency */
237 state->current_frequency = param->frequency;
238 }
239 return 0;
240 }
241
242 static int or51211_read_status(struct dvb_frontend* fe, fe_status_t* status)
243 {
244 struct or51211_state* state = fe->demodulator_priv;
245 unsigned char rec_buf[2];
246 unsigned char snd_buf[] = {0x04,0x00,0x03,0x00};
247 *status = 0;
248
249 /* Receiver Status */
250 if (i2c_writebytes(state,state->config->demod_address,snd_buf,3)) {
251 printk(KERN_WARNING "or51132: read_status write error\n");
252 return -1;
253 }
254 msleep(3);
255 if (i2c_readbytes(state,state->config->demod_address,rec_buf,2)) {
256 printk(KERN_WARNING "or51132: read_status read error\n");
257 return -1;
258 }
259 dprintk("read_status %x %x\n",rec_buf[0],rec_buf[1]);
260
261 if (rec_buf[0] & 0x01) { /* Receiver Lock */
262 *status |= FE_HAS_SIGNAL;
263 *status |= FE_HAS_CARRIER;
264 *status |= FE_HAS_VITERBI;
265 *status |= FE_HAS_SYNC;
266 *status |= FE_HAS_LOCK;
267 }
268 return 0;
269 }
270
271 /* Calculate SNR estimation (scaled by 2^24)
272
273 8-VSB SNR equation from Oren datasheets
274
275 For 8-VSB:
276 SNR[dB] = 10 * log10(219037.9454 / MSE^2 )
277
278 We re-write the snr equation as:
279 SNR * 2^24 = 10*(c - 2*intlog10(MSE))
280 Where for 8-VSB, c = log10(219037.9454) * 2^24 */
281
282 static u32 calculate_snr(u32 mse, u32 c)
283 {
284 if (mse == 0) /* No signal */
285 return 0;
286
287 mse = 2*intlog10(mse);
288 if (mse > c) {
289 /* Negative SNR, which is possible, but realisticly the
290 demod will lose lock before the signal gets this bad. The
291 API only allows for unsigned values, so just return 0 */
292 return 0;
293 }
294 return 10*(c - mse);
295 }
296
297 static int or51211_read_snr(struct dvb_frontend* fe, u16* snr)
298 {
299 struct or51211_state* state = fe->demodulator_priv;
300 u8 rec_buf[2];
301 u8 snd_buf[3];
302
303 /* SNR after Equalizer */
304 snd_buf[0] = 0x04;
305 snd_buf[1] = 0x00;
306 snd_buf[2] = 0x04;
307
308 if (i2c_writebytes(state,state->config->demod_address,snd_buf,3)) {
309 printk(KERN_WARNING "%s: error writing snr reg\n",
310 __FUNCTION__);
311 return -1;
312 }
313 if (i2c_readbytes(state,state->config->demod_address,rec_buf,2)) {
314 printk(KERN_WARNING "%s: read_status read error\n",
315 __FUNCTION__);
316 return -1;
317 }
318
319 state->snr = calculate_snr(rec_buf[0], 89599047);
320 *snr = (state->snr) >> 16;
321
322 dprintk("%s: noise = 0x%02x, snr = %d.%02d dB\n", __FUNCTION__, rec_buf[0],
323 state->snr >> 24, (((state->snr>>8) & 0xffff) * 100) >> 16);
324
325 return 0;
326 }
327
328 static int or51211_read_signal_strength(struct dvb_frontend* fe, u16* strength)
329 {
330 /* Calculate Strength from SNR up to 35dB */
331 /* Even though the SNR can go higher than 35dB, there is some comfort */
332 /* factor in having a range of strong signals that can show at 100% */
333 struct or51211_state* state = (struct or51211_state*)fe->demodulator_priv;
334 u16 snr;
335 int ret;
336
337 ret = fe->ops.read_snr(fe, &snr);
338 if (ret != 0)
339 return ret;
340 /* Rather than use the 8.8 value snr, use state->snr which is 8.24 */
341 /* scale the range 0 - 35*2^24 into 0 - 65535 */
342 if (state->snr >= 8960 * 0x10000)
343 *strength = 0xffff;
344 else
345 *strength = state->snr / 8960;
346
347 return 0;
348 }
349
350 static int or51211_read_ber(struct dvb_frontend* fe, u32* ber)
351 {
352 *ber = -ENOSYS;
353 return 0;
354 }
355
356 static int or51211_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
357 {
358 *ucblocks = -ENOSYS;
359 return 0;
360 }
361
362 static int or51211_sleep(struct dvb_frontend* fe)
363 {
364 return 0;
365 }
366
367 static int or51211_init(struct dvb_frontend* fe)
368 {
369 struct or51211_state* state = fe->demodulator_priv;
370 const struct or51211_config* config = state->config;
371 const struct firmware* fw;
372 unsigned char get_ver_buf[] = {0x04,0x00,0x30,0x00,0x00};
373 unsigned char rec_buf[14];
374 int ret,i;
375
376 if (!state->initialized) {
377 /* Request the firmware, this will block until it uploads */
378 printk(KERN_INFO "or51211: Waiting for firmware upload "
379 "(%s)...\n", OR51211_DEFAULT_FIRMWARE);
380 ret = config->request_firmware(fe, &fw,
381 OR51211_DEFAULT_FIRMWARE);
382 printk(KERN_INFO "or51211:Got Hotplug firmware\n");
383 if (ret) {
384 printk(KERN_WARNING "or51211: No firmware uploaded "
385 "(timeout or file not found?)\n");
386 return ret;
387 }
388
389 ret = or51211_load_firmware(fe, fw);
390 release_firmware(fw);
391 if (ret) {
392 printk(KERN_WARNING "or51211: Writing firmware to "
393 "device failed!\n");
394 return ret;
395 }
396 printk(KERN_INFO "or51211: Firmware upload complete.\n");
397
398 /* Set operation mode in Receiver 1 register;
399 * type 1:
400 * data 0x50h Automatic sets receiver channel conditions
401 * Automatic NTSC rejection filter
402 * Enable MPEG serial data output
403 * MPEG2tr
404 * High tuner phase noise
405 * normal +/-150kHz Carrier acquisition range
406 */
407 if (i2c_writebytes(state,state->config->demod_address,
408 cmd_buf,3)) {
409 printk(KERN_WARNING "or51211: Load DVR Error 5\n");
410 return -1;
411 }
412
413 /* Read back ucode version to besure we loaded correctly */
414 /* and are really up and running */
415 rec_buf[0] = 0x04;
416 rec_buf[1] = 0x00;
417 rec_buf[2] = 0x03;
418 rec_buf[3] = 0x00;
419 msleep(30);
420 if (i2c_writebytes(state,state->config->demod_address,
421 rec_buf,3)) {
422 printk(KERN_WARNING "or51211: Load DVR Error A\n");
423 return -1;
424 }
425 msleep(3);
426 if (i2c_readbytes(state,state->config->demod_address,
427 &rec_buf[10],2)) {
428 printk(KERN_WARNING "or51211: Load DVR Error B\n");
429 return -1;
430 }
431
432 rec_buf[0] = 0x04;
433 rec_buf[1] = 0x00;
434 rec_buf[2] = 0x01;
435 rec_buf[3] = 0x00;
436 msleep(20);
437 if (i2c_writebytes(state,state->config->demod_address,
438 rec_buf,3)) {
439 printk(KERN_WARNING "or51211: Load DVR Error C\n");
440 return -1;
441 }
442 msleep(3);
443 if (i2c_readbytes(state,state->config->demod_address,
444 &rec_buf[12],2)) {
445 printk(KERN_WARNING "or51211: Load DVR Error D\n");
446 return -1;
447 }
448
449 for (i = 0; i < 8; i++)
450 rec_buf[i]=0xed;
451
452 for (i = 0; i < 5; i++) {
453 msleep(30);
454 get_ver_buf[4] = i+1;
455 if (i2c_writebytes(state,state->config->demod_address,
456 get_ver_buf,5)) {
457 printk(KERN_WARNING "or51211:Load DVR Error 6"
458 " - %d\n",i);
459 return -1;
460 }
461 msleep(3);
462
463 if (i2c_readbytes(state,state->config->demod_address,
464 &rec_buf[i*2],2)) {
465 printk(KERN_WARNING "or51211:Load DVR Error 7"
466 " - %d\n",i);
467 return -1;
468 }
469 /* If we didn't receive the right index, try again */
470 if ((int)rec_buf[i*2+1]!=i+1){
471 i--;
472 }
473 }
474 dprintk("read_fwbits %x %x %x %x %x %x %x %x %x %x\n",
475 rec_buf[0], rec_buf[1], rec_buf[2], rec_buf[3],
476 rec_buf[4], rec_buf[5], rec_buf[6], rec_buf[7],
477 rec_buf[8], rec_buf[9]);
478
479 printk(KERN_INFO "or51211: ver TU%02x%02x%02x VSB mode %02x"
480 " Status %02x\n",
481 rec_buf[2], rec_buf[4],rec_buf[6],
482 rec_buf[12],rec_buf[10]);
483
484 rec_buf[0] = 0x04;
485 rec_buf[1] = 0x00;
486 rec_buf[2] = 0x03;
487 rec_buf[3] = 0x00;
488 msleep(20);
489 if (i2c_writebytes(state,state->config->demod_address,
490 rec_buf,3)) {
491 printk(KERN_WARNING "or51211: Load DVR Error 8\n");
492 return -1;
493 }
494 msleep(20);
495 if (i2c_readbytes(state,state->config->demod_address,
496 &rec_buf[8],2)) {
497 printk(KERN_WARNING "or51211: Load DVR Error 9\n");
498 return -1;
499 }
500 state->initialized = 1;
501 }
502
503 return 0;
504 }
505
506 static int or51211_get_tune_settings(struct dvb_frontend* fe,
507 struct dvb_frontend_tune_settings* fesettings)
508 {
509 fesettings->min_delay_ms = 500;
510 fesettings->step_size = 0;
511 fesettings->max_drift = 0;
512 return 0;
513 }
514
515 static void or51211_release(struct dvb_frontend* fe)
516 {
517 struct or51211_state* state = fe->demodulator_priv;
518 state->config->sleep(fe);
519 kfree(state);
520 }
521
522 static struct dvb_frontend_ops or51211_ops;
523
524 struct dvb_frontend* or51211_attach(const struct or51211_config* config,
525 struct i2c_adapter* i2c)
526 {
527 struct or51211_state* state = NULL;
528
529 /* Allocate memory for the internal state */
530 state = kmalloc(sizeof(struct or51211_state), GFP_KERNEL);
531 if (state == NULL)
532 return NULL;
533
534 /* Setup the state */
535 state->config = config;
536 state->i2c = i2c;
537 state->initialized = 0;
538 state->current_frequency = 0;
539
540 /* Create dvb_frontend */
541 memcpy(&state->frontend.ops, &or51211_ops, sizeof(struct dvb_frontend_ops));
542 state->frontend.demodulator_priv = state;
543 return &state->frontend;
544 }
545
546 static struct dvb_frontend_ops or51211_ops = {
547
548 .info = {
549 .name = "Oren OR51211 VSB Frontend",
550 .type = FE_ATSC,
551 .frequency_min = 44000000,
552 .frequency_max = 958000000,
553 .frequency_stepsize = 166666,
554 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
555 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
556 FE_CAN_8VSB
557 },
558
559 .release = or51211_release,
560
561 .init = or51211_init,
562 .sleep = or51211_sleep,
563
564 .set_frontend = or51211_set_parameters,
565 .get_tune_settings = or51211_get_tune_settings,
566
567 .read_status = or51211_read_status,
568 .read_ber = or51211_read_ber,
569 .read_signal_strength = or51211_read_signal_strength,
570 .read_snr = or51211_read_snr,
571 .read_ucblocks = or51211_read_ucblocks,
572 };
573
574 module_param(debug, int, 0644);
575 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
576
577 MODULE_DESCRIPTION("Oren OR51211 VSB [pcHDTV HD-2000] Demodulator Driver");
578 MODULE_AUTHOR("Kirk Lapray");
579 MODULE_LICENSE("GPL");
580
581 EXPORT_SYMBOL(or51211_attach);
582
583
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