summaryrefslogtreecommitdiff
path: root/drivers/media/dvb/frontends/stv0288.c
blob: ff1194de34c0cf176f655329af5213754b1f4fab (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
/*
	Driver for ST STV0288 demodulator
	Copyright (C) 2006 Georg Acher, BayCom GmbH, acher (at) baycom (dot) de
		for Reel Multimedia
	Copyright (C) 2008 TurboSight.com, Bob Liu <bob@turbosight.com>
	Copyright (C) 2008 Igor M. Liplianin <liplianin@me.by>
		Removed stb6000 specific tuner code and revised some
		procedures.

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to the Free Software
	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <asm/div64.h>

#include "dvb_frontend.h"
#include "stv0288.h"

struct stv0288_state {
	struct i2c_adapter *i2c;
	const struct stv0288_config *config;
	struct dvb_frontend frontend;

	u8 initialised:1;
	u32 tuner_frequency;
	u32 symbol_rate;
	fe_code_rate_t fec_inner;
	int errmode;
};

#define STATUS_BER 0
#define STATUS_UCBLOCKS 1

static int debug;
static int debug_legacy_dish_switch;
#define dprintk(args...) \
	do { \
		if (debug) \
			printk(KERN_DEBUG "stv0288: " args); \
	} while (0)


static int stv0288_writeregI(struct stv0288_state *state, u8 reg, u8 data)
{
	int ret;
	u8 buf[] = { reg, data };
	struct i2c_msg msg = {
		.addr = state->config->demod_address,
		.flags = 0,
		.buf = buf,
		.len = 2
	};

	ret = i2c_transfer(state->i2c, &msg, 1);

	if (ret != 1)
		dprintk("%s: writereg error (reg == 0x%02x, val == 0x%02x, "
			"ret == %i)\n", __func__, reg, data, ret);

	return (ret != 1) ? -EREMOTEIO : 0;
}

static int stv0288_write(struct dvb_frontend *fe, u8 *buf, int len)
{
	struct stv0288_state *state = fe->demodulator_priv;

	if (len != 2)
		return -EINVAL;

	return stv0288_writeregI(state, buf[0], buf[1]);
}

static u8 stv0288_readreg(struct stv0288_state *state, u8 reg)
{
	int ret;
	u8 b0[] = { reg };
	u8 b1[] = { 0 };
	struct i2c_msg msg[] = {
		{
			.addr = state->config->demod_address,
			.flags = 0,
			.buf = b0,
			.len = 1
		}, {
			.addr = state->config->demod_address,
			.flags = I2C_M_RD,
			.buf = b1,
			.len = 1
		}
	};

	ret = i2c_transfer(state->i2c, msg, 2);

	if (ret != 2)
		dprintk("%s: readreg error (reg == 0x%02x, ret == %i)\n",
				__func__, reg, ret);

	return b1[0];
}

static int stv0288_set_symbolrate(struct dvb_frontend *fe, u32 srate)
{
	struct stv0288_state *state = fe->demodulator_priv;
	unsigned int temp;
	unsigned char b[3];

	if ((srate < 1000000) || (srate > 45000000))
		return -EINVAL;

	temp = (unsigned int)srate / 1000;

		temp = temp * 32768;
		temp = temp / 25;
		temp = temp / 125;
		b[0] = (unsigned char)((temp >> 12) & 0xff);
		b[1] = (unsigned char)((temp >> 4) & 0xff);
		b[2] = (unsigned char)((temp << 4) & 0xf0);
		stv0288_writeregI(state, 0x28, 0x80); /* SFRH */
		stv0288_writeregI(state, 0x29, 0); /* SFRM */
		stv0288_writeregI(state, 0x2a, 0); /* SFRL */

		stv0288_writeregI(state, 0x28, b[0]);
		stv0288_writeregI(state, 0x29, b[1]);
		stv0288_writeregI(state, 0x2a, b[2]);
		dprintk("stv0288: stv0288_set_symbolrate\n");

	return 0;
}

static int stv0288_send_diseqc_msg(struct dvb_frontend *fe,
				    struct dvb_diseqc_master_cmd *m)
{
	struct stv0288_state *state = fe->demodulator_priv;

	int i;

	dprintk("%s\n", __func__);

	stv0288_writeregI(state, 0x09, 0);
	msleep(30);
	stv0288_writeregI(state, 0x05, 0x16);

	for (i = 0; i < m->msg_len; i++) {
		if (stv0288_writeregI(state, 0x06, m->msg[i]))
			return -EREMOTEIO;
		msleep(12);
	}

	return 0;
}

static int stv0288_send_diseqc_burst(struct dvb_frontend *fe,
						fe_sec_mini_cmd_t burst)
{
	struct stv0288_state *state = fe->demodulator_priv;

	dprintk("%s\n", __func__);

	if (stv0288_writeregI(state, 0x05, 0x16))/* burst mode */
		return -EREMOTEIO;

	if (stv0288_writeregI(state, 0x06, burst == SEC_MINI_A ? 0x00 : 0xff))
		return -EREMOTEIO;

	if (stv0288_writeregI(state, 0x06, 0x12))
		return -EREMOTEIO;

	return 0;
}

static int stv0288_set_tone(struct dvb_frontend *fe, fe_sec_tone_mode_t tone)
{
	struct stv0288_state *state = fe->demodulator_priv;

	switch (tone) {
	case SEC_TONE_ON:
		if (stv0288_writeregI(state, 0x05, 0x10))/* burst mode */
			return -EREMOTEIO;
		return stv0288_writeregI(state, 0x06, 0xff);

	case SEC_TONE_OFF:
		if (stv0288_writeregI(state, 0x05, 0x13))/* burst mode */
			return -EREMOTEIO;
		return stv0288_writeregI(state, 0x06, 0x00);

	default:
		return -EINVAL;
	}
}

static u8 stv0288_inittab[] = {
	0x01, 0x15,
	0x02, 0x20,
	0x09, 0x0,
	0x0a, 0x4,
	0x0b, 0x0,
	0x0c, 0x0,
	0x0d, 0x0,
	0x0e, 0xd4,
	0x0f, 0x30,
	0x11, 0x80,
	0x12, 0x03,
	0x13, 0x48,
	0x14, 0x84,
	0x15, 0x45,
	0x16, 0xb7,
	0x17, 0x9c,
	0x18, 0x0,
	0x19, 0xa6,
	0x1a, 0x88,
	0x1b, 0x8f,
	0x1c, 0xf0,
	0x20, 0x0b,
	0x21, 0x54,
	0x22, 0x0,
	0x23, 0x0,
	0x2b, 0xff,
	0x2c, 0xf7,
	0x30, 0x0,
	0x31, 0x1e,
	0x32, 0x14,
	0x33, 0x0f,
	0x34, 0x09,
	0x35, 0x0c,
	0x36, 0x05,
	0x37, 0x2f,
	0x38, 0x16,
	0x39, 0xbe,
	0x3a, 0x0,
	0x3b, 0x13,
	0x3c, 0x11,
	0x3d, 0x30,
	0x40, 0x63,
	0x41, 0x04,
	0x42, 0x60,
	0x43, 0x00,
	0x44, 0x00,
	0x45, 0x00,
	0x46, 0x00,
	0x47, 0x00,
	0x4a, 0x00,
	0x50, 0x10,
	0x51, 0x38,
	0x52, 0x21,
	0x58, 0x54,
	0x59, 0x86,
	0x5a, 0x0,
	0x5b, 0x9b,
	0x5c, 0x08,
	0x5d, 0x7f,
	0x5e, 0x0,
	0x5f, 0xff,
	0x70, 0x0,
	0x71, 0x0,
	0x72, 0x0,
	0x74, 0x0,
	0x75, 0x0,
	0x76, 0x0,
	0x81, 0x0,
	0x82, 0x3f,
	0x83, 0x3f,
	0x84, 0x0,
	0x85, 0x0,
	0x88, 0x0,
	0x89, 0x0,
	0x8a, 0x0,
	0x8b, 0x0,
	0x8c, 0x0,
	0x90, 0x0,
	0x91, 0x0,
	0x92, 0x0,
	0x93, 0x0,
	0x94, 0x1c,
	0x97, 0x0,
	0xa0, 0x48,
	0xa1, 0x0,
	0xb0, 0xb8,
	0xb1, 0x3a,
	0xb2, 0x10,
	0xb3, 0x82,
	0xb4, 0x80,
	0xb5, 0x82,
	0xb6, 0x82,
	0xb7, 0x82,
	0xb8, 0x20,
	0xb9, 0x0,
	0xf0, 0x0,
	0xf1, 0x0,
	0xf2, 0xc0,
	0x51, 0x36,
	0x52, 0x09,
	0x53, 0x94,
	0x54, 0x62,
	0x55, 0x29,
	0x56, 0x64,
	0x57, 0x2b,
	0xff, 0xff,
};

static int stv0288_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t volt)
{
	dprintk("%s: %s\n", __func__,
		volt == SEC_VOLTAGE_13 ? "SEC_VOLTAGE_13" :
		volt == SEC_VOLTAGE_18 ? "SEC_VOLTAGE_18" : "??");

	return 0;
}

static int stv0288_init(struct dvb_frontend *fe)
{
	struct stv0288_state *state = fe->demodulator_priv;
	int i;
	u8 reg;
	u8 val;

	dprintk("stv0288: init chip\n");
	stv0288_writeregI(state, 0x41, 0x04);
	msleep(50);

	/* we have default inittab */
	if (state->config->inittab == NULL) {
		for (i = 0; !(stv0288_inittab[i] == 0xff &&
				stv0288_inittab[i + 1] == 0xff); i += 2)
			stv0288_writeregI(state, stv0288_inittab[i],
					stv0288_inittab[i + 1]);
	} else {
		for (i = 0; ; i += 2)  {
			reg = state->config->inittab[i];
			val = state->config->inittab[i+1];
			if (reg == 0xff && val == 0xff)
				break;
			stv0288_writeregI(state, reg, val);
		}
	}
	return 0;
}

static int stv0288_read_status(struct dvb_frontend *fe, fe_status_t *status)
{
	struct stv0288_state *state = fe->demodulator_priv;

	u8 sync = stv0288_readreg(state, 0x24);
	if (sync == 255)
		sync = 0;

	dprintk("%s : FE_READ_STATUS : VSTATUS: 0x%02x\n", __func__, sync);

	*status = 0;

	if ((sync & 0x08) == 0x08) {
		*status |= FE_HAS_LOCK;
		dprintk("stv0288 has locked\n");
	}

	return 0;
}

static int stv0288_read_ber(struct dvb_frontend *fe, u32 *ber)
{
	struct stv0288_state *state = fe->demodulator_priv;

	if (state->errmode != STATUS_BER)
		return 0;
	*ber = (stv0288_readreg(state, 0x26) << 8) |
					stv0288_readreg(state, 0x27);
	dprintk("stv0288_read_ber %d\n", *ber);

	return 0;
}


static int stv0288_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
{
	struct stv0288_state *state = fe->demodulator_priv;

	s32 signal =  0xffff - ((stv0288_readreg(state, 0x10) << 8));


	signal = signal * 5 / 4;
	*strength = (signal > 0xffff) ? 0xffff : (signal < 0) ? 0 : signal;
	dprintk("stv0288_read_signal_strength %d\n", *strength);

	return 0;
}
static int stv0288_sleep(struct dvb_frontend *fe)
{
	struct stv0288_state *state = fe->demodulator_priv;

	stv0288_writeregI(state, 0x41, 0x84);
	state->initialised = 0;

	return 0;
}
static int stv0288_read_snr(struct dvb_frontend *fe, u16 *snr)
{
	struct stv0288_state *state = fe->demodulator_priv;

	s32 xsnr = 0xffff - ((stv0288_readreg(state, 0x2d) << 8)
			   | stv0288_readreg(state, 0x2e));
	xsnr = 3 * (xsnr - 0xa100);
	*snr = (xsnr > 0xffff) ? 0xffff : (xsnr < 0) ? 0 : xsnr;
	dprintk("stv0288_read_snr %d\n", *snr);

	return 0;
}

static int stv0288_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
{
	struct stv0288_state *state = fe->demodulator_priv;

	if (state->errmode != STATUS_BER)
		return 0;
	*ucblocks = (stv0288_readreg(state, 0x26) << 8) |
					stv0288_readreg(state, 0x27);
	dprintk("stv0288_read_ber %d\n", *ucblocks);

	return 0;
}

static int stv0288_set_property(struct dvb_frontend *fe, struct dtv_property *p)
{
	dprintk("%s(..)\n", __func__);
	return 0;
}

static int stv0288_get_property(struct dvb_frontend *fe, struct dtv_property *p)
{
	dprintk("%s(..)\n", __func__);
	return 0;
}

static int stv0288_set_frontend(struct dvb_frontend *fe,
					struct dvb_frontend_parameters *dfp)
{
	struct stv0288_state *state = fe->demodulator_priv;
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;

	char tm;
	unsigned char tda[3];

	dprintk("%s : FE_SET_FRONTEND\n", __func__);

	if (c->delivery_system != SYS_DVBS) {
			dprintk("%s: unsupported delivery "
				"system selected (%d)\n",
				__func__, c->delivery_system);
			return -EOPNOTSUPP;
	}

	if (state->config->set_ts_params)
		state->config->set_ts_params(fe, 0);

	/* only frequency & symbol_rate are used for tuner*/
	dfp->frequency = c->frequency;
	dfp->u.qpsk.symbol_rate = c->symbol_rate;
	if (fe->ops.tuner_ops.set_params) {
		fe->ops.tuner_ops.set_params(fe, dfp);
		if (fe->ops.i2c_gate_ctrl)
			fe->ops.i2c_gate_ctrl(fe, 0);
	}

	udelay(10);
	stv0288_set_symbolrate(fe, c->symbol_rate);
	/* Carrier lock control register */
	stv0288_writeregI(state, 0x15, 0xc5);

	tda[0] = 0x2b; /* CFRM */
	tda[2] = 0x0; /* CFRL */
	for (tm = -6; tm < 7;) {
		/* Viterbi status */
		if (stv0288_readreg(state, 0x24) & 0x80)
			break;

		tda[2] += 40;
		if (tda[2] < 40)
			tm++;
		tda[1] = (unsigned char)tm;
		stv0288_writeregI(state, 0x2b, tda[1]);
		stv0288_writeregI(state, 0x2c, tda[2]);
		udelay(30);
	}

	state->tuner_frequency = c->frequency;
	state->fec_inner = FEC_AUTO;
	state->symbol_rate = c->symbol_rate;

	return 0;
}

static int stv0288_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
{
	struct stv0288_state *state = fe->demodulator_priv;

	if (enable)
		stv0288_writeregI(state, 0x01, 0xb5);
	else
		stv0288_writeregI(state, 0x01, 0x35);

	udelay(1);

	return 0;
}

static void stv0288_release(struct dvb_frontend *fe)
{
	struct stv0288_state *state = fe->demodulator_priv;
	kfree(state);
}

static struct dvb_frontend_ops stv0288_ops = {

	.info = {
		.name			= "ST STV0288 DVB-S",
		.type			= FE_QPSK,
		.frequency_min		= 950000,
		.frequency_max		= 2150000,
		.frequency_stepsize	= 1000,	 /* kHz for QPSK frontends */
		.frequency_tolerance	= 0,
		.symbol_rate_min	= 1000000,
		.symbol_rate_max	= 45000000,
		.symbol_rate_tolerance	= 500,	/* ppm */
		.caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
		      FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 |
		      FE_CAN_QPSK |
		      FE_CAN_FEC_AUTO
	},

	.release = stv0288_release,
	.init = stv0288_init,
	.sleep = stv0288_sleep,
	.write = stv0288_write,
	.i2c_gate_ctrl = stv0288_i2c_gate_ctrl,
	.read_status = stv0288_read_status,
	.read_ber = stv0288_read_ber,
	.read_signal_strength = stv0288_read_signal_strength,
	.read_snr = stv0288_read_snr,
	.read_ucblocks = stv0288_read_ucblocks,
	.diseqc_send_master_cmd = stv0288_send_diseqc_msg,
	.diseqc_send_burst = stv0288_send_diseqc_burst,
	.set_tone = stv0288_set_tone,
	.set_voltage = stv0288_set_voltage,

	.set_property = stv0288_set_property,
	.get_property = stv0288_get_property,
	.set_frontend = stv0288_set_frontend,
};

struct dvb_frontend *stv0288_attach(const struct stv0288_config *config,
				    struct i2c_adapter *i2c)
{
	struct stv0288_state *state = NULL;
	int id;

	/* allocate memory for the internal state */
	state = kmalloc(sizeof(struct stv0288_state), GFP_KERNEL);
	if (state == NULL)
		goto error;

	/* setup the state */
	state->config = config;
	state->i2c = i2c;
	state->initialised = 0;
	state->tuner_frequency = 0;
	state->symbol_rate = 0;
	state->fec_inner = 0;
	state->errmode = STATUS_BER;

	stv0288_writeregI(state, 0x41, 0x04);
	msleep(200);
	id = stv0288_readreg(state, 0x00);
	dprintk("stv0288 id %x\n", id);

	/* register 0x00 contains 0x11 for STV0288  */
	if (id != 0x11)
		goto error;

	/* create dvb_frontend */
	memcpy(&state->frontend.ops, &stv0288_ops,
			sizeof(struct dvb_frontend_ops));
	state->frontend.demodulator_priv = state;
	return &state->frontend;

error:
	kfree(state);

	return NULL;
}
EXPORT_SYMBOL(stv0288_attach);

module_param(debug_legacy_dish_switch, int, 0444);
MODULE_PARM_DESC(debug_legacy_dish_switch,
		"Enable timing analysis for Dish Network legacy switches");

module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");

MODULE_DESCRIPTION("ST STV0288 DVB Demodulator driver");
MODULE_AUTHOR("Georg Acher, Bob Liu, Igor liplianin");
MODULE_LICENSE("GPL");