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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / media / dvb-frontends / or51211.c
blob10cfc05791689323b0d4ab5b967eb22ff7e9e1db
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 #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__
26
27 /*
28 * This driver needs external firmware. Please use the command
29 * "<kerneldir>/Documentation/dvb/get_dvb_firmware or51211" to
30 * download/extract it, and then copy it to /usr/lib/hotplug/firmware
31 * or /lib/firmware (depending on configuration of firmware hotplug).
32 */
33 #define OR51211_DEFAULT_FIRMWARE "dvb-fe-or51211.fw"
34
35 #include <linux/kernel.h>
36 #include <linux/module.h>
37 #include <linux/device.h>
38 #include <linux/firmware.h>
39 #include <linux/string.h>
40 #include <linux/slab.h>
41 #include <asm/byteorder.h>
42
43 #include "dvb_math.h"
44 #include "dvb_frontend.h"
45 #include "or51211.h"
46
47 static int debug;
48 #define dprintk(args...) \
49 do { if (debug) pr_debug(args); } 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, const 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 = (u8 *)buf;
81
82 if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
83 pr_warn("error (addr %02x, err == %i)\n", reg, err);
84 return -EREMOTEIO;
85 }
86
87 return 0;
88 }
89
90 static int i2c_readbytes(struct or51211_state *state, u8 reg, u8 *buf, int len)
91 {
92 int err;
93 struct i2c_msg msg;
94 msg.addr = reg;
95 msg.flags = I2C_M_RD;
96 msg.len = len;
97 msg.buf = buf;
98
99 if ((err = i2c_transfer (state->i2c, &msg, 1)) != 1) {
100 pr_warn("error (addr %02x, err == %i)\n", reg, err);
101 return -EREMOTEIO;
102 }
103
104 return 0;
105 }
106
107 static int or51211_load_firmware (struct dvb_frontend* fe,
108 const struct firmware *fw)
109 {
110 struct or51211_state* state = fe->demodulator_priv;
111 u8 tudata[585];
112 int i;
113
114 dprintk("Firmware is %zd bytes\n",fw->size);
115
116 /* Get eprom data */
117 tudata[0] = 17;
118 if (i2c_writebytes(state,0x50,tudata,1)) {
119 pr_warn("error eprom addr\n");
120 return -1;
121 }
122 if (i2c_readbytes(state,0x50,&tudata[145],192)) {
123 pr_warn("error eprom\n");
124 return -1;
125 }
126
127 /* Create firmware buffer */
128 for (i = 0; i < 145; i++)
129 tudata[i] = fw->data[i];
130
131 for (i = 0; i < 248; i++)
132 tudata[i+337] = fw->data[145+i];
133
134 state->config->reset(fe);
135
136 if (i2c_writebytes(state,state->config->demod_address,tudata,585)) {
137 pr_warn("error 1\n");
138 return -1;
139 }
140 msleep(1);
141
142 if (i2c_writebytes(state,state->config->demod_address,
143 &fw->data[393],8125)) {
144 pr_warn("error 2\n");
145 return -1;
146 }
147 msleep(1);
148
149 if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) {
150 pr_warn("error 3\n");
151 return -1;
152 }
153
154 /* Wait at least 5 msec */
155 msleep(10);
156 if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) {
157 pr_warn("error 4\n");
158 return -1;
159 }
160 msleep(10);
161
162 pr_info("Done.\n");
163 return 0;
164 };
165
166 static int or51211_setmode(struct dvb_frontend* fe, int mode)
167 {
168 struct or51211_state* state = fe->demodulator_priv;
169 u8 rec_buf[14];
170
171 state->config->setmode(fe, mode);
172
173 if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) {
174 pr_warn("error 1\n");
175 return -1;
176 }
177
178 /* Wait at least 5 msec */
179 msleep(10);
180 if (i2c_writebytes(state,state->config->demod_address,run_buf,2)) {
181 pr_warn("error 2\n");
182 return -1;
183 }
184
185 msleep(10);
186
187 /* Set operation mode in Receiver 1 register;
188 * type 1:
189 * data 0x50h Automatic sets receiver channel conditions
190 * Automatic NTSC rejection filter
191 * Enable MPEG serial data output
192 * MPEG2tr
193 * High tuner phase noise
194 * normal +/-150kHz Carrier acquisition range
195 */
196 if (i2c_writebytes(state,state->config->demod_address,cmd_buf,3)) {
197 pr_warn("error 3\n");
198 return -1;
199 }
200
201 rec_buf[0] = 0x04;
202 rec_buf[1] = 0x00;
203 rec_buf[2] = 0x03;
204 rec_buf[3] = 0x00;
205 msleep(20);
206 if (i2c_writebytes(state,state->config->demod_address,rec_buf,3)) {
207 pr_warn("error 5\n");
208 }
209 msleep(3);
210 if (i2c_readbytes(state,state->config->demod_address,&rec_buf[10],2)) {
211 pr_warn("error 6\n");
212 return -1;
213 }
214 dprintk("rec status %02x %02x\n", rec_buf[10], rec_buf[11]);
215
216 return 0;
217 }
218
219 static int or51211_set_parameters(struct dvb_frontend *fe)
220 {
221 struct dtv_frontend_properties *p = &fe->dtv_property_cache;
222 struct or51211_state* state = fe->demodulator_priv;
223
224 /* Change only if we are actually changing the channel */
225 if (state->current_frequency != p->frequency) {
226 if (fe->ops.tuner_ops.set_params) {
227 fe->ops.tuner_ops.set_params(fe);
228 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
229 }
230
231 /* Set to ATSC mode */
232 or51211_setmode(fe,0);
233
234 /* Update current frequency */
235 state->current_frequency = p->frequency;
236 }
237 return 0;
238 }
239
240 static int or51211_read_status(struct dvb_frontend* fe, fe_status_t* status)
241 {
242 struct or51211_state* state = fe->demodulator_priv;
243 unsigned char rec_buf[2];
244 unsigned char snd_buf[] = {0x04,0x00,0x03,0x00};
245 *status = 0;
246
247 /* Receiver Status */
248 if (i2c_writebytes(state,state->config->demod_address,snd_buf,3)) {
249 pr_warn("write error\n");
250 return -1;
251 }
252 msleep(3);
253 if (i2c_readbytes(state,state->config->demod_address,rec_buf,2)) {
254 pr_warn("read error\n");
255 return -1;
256 }
257 dprintk("%x %x\n", rec_buf[0], rec_buf[1]);
258
259 if (rec_buf[0] & 0x01) { /* Receiver Lock */
260 *status |= FE_HAS_SIGNAL;
261 *status |= FE_HAS_CARRIER;
262 *status |= FE_HAS_VITERBI;
263 *status |= FE_HAS_SYNC;
264 *status |= FE_HAS_LOCK;
265 }
266 return 0;
267 }
268
269 /* Calculate SNR estimation (scaled by 2^24)
270
271 8-VSB SNR equation from Oren datasheets
272
273 For 8-VSB:
274 SNR[dB] = 10 * log10(219037.9454 / MSE^2 )
275
276 We re-write the snr equation as:
277 SNR * 2^24 = 10*(c - 2*intlog10(MSE))
278 Where for 8-VSB, c = log10(219037.9454) * 2^24 */
279
280 static u32 calculate_snr(u32 mse, u32 c)
281 {
282 if (mse == 0) /* No signal */
283 return 0;
284
285 mse = 2*intlog10(mse);
286 if (mse > c) {
287 /* Negative SNR, which is possible, but realisticly the
288 demod will lose lock before the signal gets this bad. The
289 API only allows for unsigned values, so just return 0 */
290 return 0;
291 }
292 return 10*(c - mse);
293 }
294
295 static int or51211_read_snr(struct dvb_frontend* fe, u16* snr)
296 {
297 struct or51211_state* state = fe->demodulator_priv;
298 u8 rec_buf[2];
299 u8 snd_buf[3];
300
301 /* SNR after Equalizer */
302 snd_buf[0] = 0x04;
303 snd_buf[1] = 0x00;
304 snd_buf[2] = 0x04;
305
306 if (i2c_writebytes(state,state->config->demod_address,snd_buf,3)) {
307 pr_warn("error writing snr reg\n");
308 return -1;
309 }
310 if (i2c_readbytes(state,state->config->demod_address,rec_buf,2)) {
311 pr_warn("read_status read error\n");
312 return -1;
313 }
314
315 state->snr = calculate_snr(rec_buf[0], 89599047);
316 *snr = (state->snr) >> 16;
317
318 dprintk("noise = 0x%02x, snr = %d.%02d dB\n", rec_buf[0],
319 state->snr >> 24, (((state->snr>>8) & 0xffff) * 100) >> 16);
320
321 return 0;
322 }
323
324 static int or51211_read_signal_strength(struct dvb_frontend* fe, u16* strength)
325 {
326 /* Calculate Strength from SNR up to 35dB */
327 /* Even though the SNR can go higher than 35dB, there is some comfort */
328 /* factor in having a range of strong signals that can show at 100% */
329 struct or51211_state* state = (struct or51211_state*)fe->demodulator_priv;
330 u16 snr;
331 int ret;
332
333 ret = fe->ops.read_snr(fe, &snr);
334 if (ret != 0)
335 return ret;
336 /* Rather than use the 8.8 value snr, use state->snr which is 8.24 */
337 /* scale the range 0 - 35*2^24 into 0 - 65535 */
338 if (state->snr >= 8960 * 0x10000)
339 *strength = 0xffff;
340 else
341 *strength = state->snr / 8960;
342
343 return 0;
344 }
345
346 static int or51211_read_ber(struct dvb_frontend* fe, u32* ber)
347 {
348 *ber = -ENOSYS;
349 return 0;
350 }
351
352 static int or51211_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
353 {
354 *ucblocks = -ENOSYS;
355 return 0;
356 }
357
358 static int or51211_sleep(struct dvb_frontend* fe)
359 {
360 return 0;
361 }
362
363 static int or51211_init(struct dvb_frontend* fe)
364 {
365 struct or51211_state* state = fe->demodulator_priv;
366 const struct or51211_config* config = state->config;
367 const struct firmware* fw;
368 unsigned char get_ver_buf[] = {0x04,0x00,0x30,0x00,0x00};
369 unsigned char rec_buf[14];
370 int ret,i;
371
372 if (!state->initialized) {
373 /* Request the firmware, this will block until it uploads */
374 pr_info("Waiting for firmware upload (%s)...\n",
375 OR51211_DEFAULT_FIRMWARE);
376 ret = config->request_firmware(fe, &fw,
377 OR51211_DEFAULT_FIRMWARE);
378 pr_info("Got Hotplug firmware\n");
379 if (ret) {
380 pr_warn("No firmware uploaded "
381 "(timeout or file not found?)\n");
382 return ret;
383 }
384
385 ret = or51211_load_firmware(fe, fw);
386 release_firmware(fw);
387 if (ret) {
388 pr_warn("Writing firmware to device failed!\n");
389 return ret;
390 }
391 pr_info("Firmware upload complete.\n");
392
393 /* Set operation mode in Receiver 1 register;
394 * type 1:
395 * data 0x50h Automatic sets receiver channel conditions
396 * Automatic NTSC rejection filter
397 * Enable MPEG serial data output
398 * MPEG2tr
399 * High tuner phase noise
400 * normal +/-150kHz Carrier acquisition range
401 */
402 if (i2c_writebytes(state,state->config->demod_address,
403 cmd_buf,3)) {
404 pr_warn("Load DVR Error 5\n");
405 return -1;
406 }
407
408 /* Read back ucode version to besure we loaded correctly */
409 /* and are really up and running */
410 rec_buf[0] = 0x04;
411 rec_buf[1] = 0x00;
412 rec_buf[2] = 0x03;
413 rec_buf[3] = 0x00;
414 msleep(30);
415 if (i2c_writebytes(state,state->config->demod_address,
416 rec_buf,3)) {
417 pr_warn("Load DVR Error A\n");
418 return -1;
419 }
420 msleep(3);
421 if (i2c_readbytes(state,state->config->demod_address,
422 &rec_buf[10],2)) {
423 pr_warn("Load DVR Error B\n");
424 return -1;
425 }
426
427 rec_buf[0] = 0x04;
428 rec_buf[1] = 0x00;
429 rec_buf[2] = 0x01;
430 rec_buf[3] = 0x00;
431 msleep(20);
432 if (i2c_writebytes(state,state->config->demod_address,
433 rec_buf,3)) {
434 pr_warn("Load DVR Error C\n");
435 return -1;
436 }
437 msleep(3);
438 if (i2c_readbytes(state,state->config->demod_address,
439 &rec_buf[12],2)) {
440 pr_warn("Load DVR Error D\n");
441 return -1;
442 }
443
444 for (i = 0; i < 8; i++)
445 rec_buf[i]=0xed;
446
447 for (i = 0; i < 5; i++) {
448 msleep(30);
449 get_ver_buf[4] = i+1;
450 if (i2c_writebytes(state,state->config->demod_address,
451 get_ver_buf,5)) {
452 pr_warn("Load DVR Error 6 - %d\n", i);
453 return -1;
454 }
455 msleep(3);
456
457 if (i2c_readbytes(state,state->config->demod_address,
458 &rec_buf[i*2],2)) {
459 pr_warn("Load DVR Error 7 - %d\n", i);
460 return -1;
461 }
462 /* If we didn't receive the right index, try again */
463 if ((int)rec_buf[i*2+1]!=i+1){
464 i--;
465 }
466 }
467 dprintk("read_fwbits %10ph\n", rec_buf);
468
469 pr_info("ver TU%02x%02x%02x VSB mode %02x Status %02x\n",
470 rec_buf[2], rec_buf[4], rec_buf[6], rec_buf[12],
471 rec_buf[10]);
472
473 rec_buf[0] = 0x04;
474 rec_buf[1] = 0x00;
475 rec_buf[2] = 0x03;
476 rec_buf[3] = 0x00;
477 msleep(20);
478 if (i2c_writebytes(state,state->config->demod_address,
479 rec_buf,3)) {
480 pr_warn("Load DVR Error 8\n");
481 return -1;
482 }
483 msleep(20);
484 if (i2c_readbytes(state,state->config->demod_address,
485 &rec_buf[8],2)) {
486 pr_warn("Load DVR Error 9\n");
487 return -1;
488 }
489 state->initialized = 1;
490 }
491
492 return 0;
493 }
494
495 static int or51211_get_tune_settings(struct dvb_frontend* fe,
496 struct dvb_frontend_tune_settings* fesettings)
497 {
498 fesettings->min_delay_ms = 500;
499 fesettings->step_size = 0;
500 fesettings->max_drift = 0;
501 return 0;
502 }
503
504 static void or51211_release(struct dvb_frontend* fe)
505 {
506 struct or51211_state* state = fe->demodulator_priv;
507 state->config->sleep(fe);
508 kfree(state);
509 }
510
511 static struct dvb_frontend_ops or51211_ops;
512
513 struct dvb_frontend* or51211_attach(const struct or51211_config* config,
514 struct i2c_adapter* i2c)
515 {
516 struct or51211_state* state = NULL;
517
518 /* Allocate memory for the internal state */
519 state = kzalloc(sizeof(struct or51211_state), GFP_KERNEL);
520 if (state == NULL)
521 return NULL;
522
523 /* Setup the state */
524 state->config = config;
525 state->i2c = i2c;
526 state->initialized = 0;
527 state->current_frequency = 0;
528
529 /* Create dvb_frontend */
530 memcpy(&state->frontend.ops, &or51211_ops, sizeof(struct dvb_frontend_ops));
531 state->frontend.demodulator_priv = state;
532 return &state->frontend;
533 }
534
535 static struct dvb_frontend_ops or51211_ops = {
536 .delsys = { SYS_ATSC, SYS_DVBC_ANNEX_B },
537 .info = {
538 .name = "Oren OR51211 VSB Frontend",
539 .frequency_min = 44000000,
540 .frequency_max = 958000000,
541 .frequency_stepsize = 166666,
542 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
543 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
544 FE_CAN_8VSB
545 },
546
547 .release = or51211_release,
548
549 .init = or51211_init,
550 .sleep = or51211_sleep,
551
552 .set_frontend = or51211_set_parameters,
553 .get_tune_settings = or51211_get_tune_settings,
554
555 .read_status = or51211_read_status,
556 .read_ber = or51211_read_ber,
557 .read_signal_strength = or51211_read_signal_strength,
558 .read_snr = or51211_read_snr,
559 .read_ucblocks = or51211_read_ucblocks,
560 };
561
562 module_param(debug, int, 0644);
563 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
564
565 MODULE_DESCRIPTION("Oren OR51211 VSB [pcHDTV HD-2000] Demodulator Driver");
566 MODULE_AUTHOR("Kirk Lapray");
567 MODULE_LICENSE("GPL");
568
569 EXPORT_SYMBOL(or51211_attach);
570
Linux with added FPC-III support