summaryrefslogtreecommitdiff
path: root/drivers/media/dvb/b2c2/flexcop-fe-tuner.c
blob: 5cded370854167b2d3db6ffec80e7914ad7437f1 (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
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
/*
 * This file is part of linux driver the digital TV devices equipped with B2C2 FlexcopII(b)/III
 *
 * flexcop-fe-tuner.c - methods for attaching a frontend and controlling DiSEqC.
 *
 * see flexcop.c for copyright information.
 */
#include <media/tuner.h>

#include "flexcop.h"

#include "stv0299.h"
#include "mt352.h"
#include "nxt200x.h"
#include "bcm3510.h"
#include "stv0297.h"
#include "mt312.h"
#include "lgdt330x.h"
#include "dvb-pll.h"
#include "tuner-simple.h"

#include "s5h1420.h"
#include "itd1000.h"

#include "cx24123.h"
#include "cx24113.h"

#include "isl6421.h"

/* lnb control */

static int flexcop_set_voltage(struct dvb_frontend *fe, fe_sec_voltage_t voltage)
{
	struct flexcop_device *fc = fe->dvb->priv;
	flexcop_ibi_value v;
	deb_tuner("polarity/voltage = %u\n", voltage);

	v = fc->read_ibi_reg(fc, misc_204);
	switch (voltage) {
		case SEC_VOLTAGE_OFF:
			v.misc_204.ACPI1_sig = 1;
			break;
		case SEC_VOLTAGE_13:
			v.misc_204.ACPI1_sig = 0;
			v.misc_204.LNB_L_H_sig = 0;
			break;
		case SEC_VOLTAGE_18:
			v.misc_204.ACPI1_sig = 0;
			v.misc_204.LNB_L_H_sig = 1;
			break;
		default:
			err("unknown SEC_VOLTAGE value");
			return -EINVAL;
	}
	return fc->write_ibi_reg(fc, misc_204, v);
}

static int flexcop_sleep(struct dvb_frontend* fe)
{
	struct flexcop_device *fc = fe->dvb->priv;
/*	flexcop_ibi_value v = fc->read_ibi_reg(fc,misc_204); */

	if (fc->fe_sleep)
		return fc->fe_sleep(fe);

/*	v.misc_204.ACPI3_sig = 1;
	fc->write_ibi_reg(fc,misc_204,v);*/

	return 0;
}

static int flexcop_set_tone(struct dvb_frontend *fe, fe_sec_tone_mode_t tone)
{
	/* u16 wz_half_period_for_45_mhz[] = { 0x01ff, 0x0154, 0x00ff, 0x00cc }; */
	struct flexcop_device *fc = fe->dvb->priv;
	flexcop_ibi_value v;
	u16 ax;
	v.raw = 0;

	deb_tuner("tone = %u\n",tone);

	switch (tone) {
		case SEC_TONE_ON:
			ax = 0x01ff;
			break;
		case SEC_TONE_OFF:
			ax = 0;
			break;
		default:
			err("unknown SEC_TONE value");
			return -EINVAL;
	}

	v.lnb_switch_freq_200.LNB_CTLPrescaler_sig = 1; /* divide by 2 */

	v.lnb_switch_freq_200.LNB_CTLHighCount_sig = ax;
	v.lnb_switch_freq_200.LNB_CTLLowCount_sig  = ax == 0 ? 0x1ff : ax;

	return fc->write_ibi_reg(fc,lnb_switch_freq_200,v);
}

static void flexcop_diseqc_send_bit(struct dvb_frontend* fe, int data)
{
	flexcop_set_tone(fe, SEC_TONE_ON);
	udelay(data ? 500 : 1000);
	flexcop_set_tone(fe, SEC_TONE_OFF);
	udelay(data ? 1000 : 500);
}

static void flexcop_diseqc_send_byte(struct dvb_frontend* fe, int data)
{
	int i, par = 1, d;

	for (i = 7; i >= 0; i--) {
		d = (data >> i) & 1;
		par ^= d;
		flexcop_diseqc_send_bit(fe, d);
	}

	flexcop_diseqc_send_bit(fe, par);
}

static int flexcop_send_diseqc_msg(struct dvb_frontend* fe, int len, u8 *msg, unsigned long burst)
{
	int i;

	flexcop_set_tone(fe, SEC_TONE_OFF);
	mdelay(16);

	for (i = 0; i < len; i++)
		flexcop_diseqc_send_byte(fe,msg[i]);

	mdelay(16);

	if (burst != -1) {
		if (burst)
			flexcop_diseqc_send_byte(fe, 0xff);
		else {
			flexcop_set_tone(fe, SEC_TONE_ON);
			mdelay(12);
			udelay(500);
			flexcop_set_tone(fe, SEC_TONE_OFF);
		}
		msleep(20);
	}
	return 0;
}

static int flexcop_diseqc_send_master_cmd(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd* cmd)
{
	return flexcop_send_diseqc_msg(fe, cmd->msg_len, cmd->msg, 0);
}

static int flexcop_diseqc_send_burst(struct dvb_frontend* fe, fe_sec_mini_cmd_t minicmd)
{
	return flexcop_send_diseqc_msg(fe, 0, NULL, minicmd);
}

/* dvb-s stv0299 */
static int samsung_tbmu24112_set_symbol_rate(struct dvb_frontend* fe, u32 srate, u32 ratio)
{
	u8 aclk = 0;
	u8 bclk = 0;

	if (srate < 1500000) { aclk = 0xb7; bclk = 0x47; }
	else if (srate < 3000000) { aclk = 0xb7; bclk = 0x4b; }
	else if (srate < 7000000) { aclk = 0xb7; bclk = 0x4f; }
	else if (srate < 14000000) { aclk = 0xb7; bclk = 0x53; }
	else if (srate < 30000000) { aclk = 0xb6; bclk = 0x53; }
	else if (srate < 45000000) { aclk = 0xb4; bclk = 0x51; }

	stv0299_writereg (fe, 0x13, aclk);
	stv0299_writereg (fe, 0x14, bclk);
	stv0299_writereg (fe, 0x1f, (ratio >> 16) & 0xff);
	stv0299_writereg (fe, 0x20, (ratio >>  8) & 0xff);
	stv0299_writereg (fe, 0x21, (ratio      ) & 0xf0);

	return 0;
}

static int samsung_tbmu24112_tuner_set_params(struct dvb_frontend* fe, struct dvb_frontend_parameters *params)
{
	u8 buf[4];
	u32 div;
	struct i2c_msg msg = { .addr = 0x61, .flags = 0, .buf = buf, .len = sizeof(buf) };
	struct flexcop_device *fc = fe->dvb->priv;

	div = params->frequency / 125;

	buf[0] = (div >> 8) & 0x7f;
	buf[1] = div & 0xff;
	buf[2] = 0x84;  /* 0xC4 */
	buf[3] = 0x08;

	if (params->frequency < 1500000)
		buf[3] |= 0x10;

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1);
	if (i2c_transfer(&fc->fc_i2c_adap[0].i2c_adap, &msg, 1) != 1)
		return -EIO;
	return 0;
}

static u8 samsung_tbmu24112_inittab[] = {
	     0x01, 0x15,
	     0x02, 0x30,
	     0x03, 0x00,
	     0x04, 0x7D,
	     0x05, 0x35,
	     0x06, 0x02,
	     0x07, 0x00,
	     0x08, 0xC3,
	     0x0C, 0x00,
	     0x0D, 0x81,
	     0x0E, 0x23,
	     0x0F, 0x12,
	     0x10, 0x7E,
	     0x11, 0x84,
	     0x12, 0xB9,
	     0x13, 0x88,
	     0x14, 0x89,
	     0x15, 0xC9,
	     0x16, 0x00,
	     0x17, 0x5C,
	     0x18, 0x00,
	     0x19, 0x00,
	     0x1A, 0x00,
	     0x1C, 0x00,
	     0x1D, 0x00,
	     0x1E, 0x00,
	     0x1F, 0x3A,
	     0x20, 0x2E,
	     0x21, 0x80,
	     0x22, 0xFF,
	     0x23, 0xC1,
	     0x28, 0x00,
	     0x29, 0x1E,
	     0x2A, 0x14,
	     0x2B, 0x0F,
	     0x2C, 0x09,
	     0x2D, 0x05,
	     0x31, 0x1F,
	     0x32, 0x19,
	     0x33, 0xFE,
	     0x34, 0x93,
	     0xff, 0xff,
};

static struct stv0299_config samsung_tbmu24112_config = {
	.demod_address = 0x68,
	.inittab = samsung_tbmu24112_inittab,
	.mclk = 88000000UL,
	.invert = 0,
	.skip_reinit = 0,
	.lock_output = STV0299_LOCKOUTPUT_LK,
	.volt13_op0_op1 = STV0299_VOLT13_OP1,
	.min_delay_ms = 100,
	.set_symbol_rate = samsung_tbmu24112_set_symbol_rate,
};

/* dvb-t mt352 */
static int samsung_tdtc9251dh0_demod_init(struct dvb_frontend* fe)
{
	static u8 mt352_clock_config [] = { 0x89, 0x18, 0x2d };
	static u8 mt352_reset [] = { 0x50, 0x80 };
	static u8 mt352_adc_ctl_1_cfg [] = { 0x8E, 0x40 };
	static u8 mt352_agc_cfg [] = { 0x67, 0x28, 0xa1 };
	static u8 mt352_capt_range_cfg[] = { 0x75, 0x32 };

	mt352_write(fe, mt352_clock_config, sizeof(mt352_clock_config));
	udelay(2000);
	mt352_write(fe, mt352_reset, sizeof(mt352_reset));
	mt352_write(fe, mt352_adc_ctl_1_cfg, sizeof(mt352_adc_ctl_1_cfg));

	mt352_write(fe, mt352_agc_cfg, sizeof(mt352_agc_cfg));
	mt352_write(fe, mt352_capt_range_cfg, sizeof(mt352_capt_range_cfg));

	return 0;
}

static int samsung_tdtc9251dh0_calc_regs(struct dvb_frontend* fe, struct dvb_frontend_parameters *params, u8* pllbuf, int buf_len)
{
	u32 div;
	unsigned char bs = 0;

	if (buf_len < 5)
		return -EINVAL;

	#define IF_FREQUENCYx6 217    /* 6 * 36.16666666667MHz */
	div = (((params->frequency + 83333) * 3) / 500000) + IF_FREQUENCYx6;

	if (params->frequency >= 48000000 && params->frequency <= 154000000) bs = 0x09;
	if (params->frequency >= 161000000 && params->frequency <= 439000000) bs = 0x0a;
	if (params->frequency >= 447000000 && params->frequency <= 863000000) bs = 0x08;

	pllbuf[0] = 0x61;
	pllbuf[1] = div >> 8;
	pllbuf[2] = div & 0xff;
	pllbuf[3] = 0xcc;
	pllbuf[4] = bs;

	return 5;
}

static struct mt352_config samsung_tdtc9251dh0_config = {
	.demod_address = 0x0f,
	.demod_init    = samsung_tdtc9251dh0_demod_init,
};

static int flexcop_fe_request_firmware(struct dvb_frontend* fe, const struct firmware **fw, char* name)
{
	struct flexcop_device *fc = fe->dvb->priv;
	return request_firmware(fw, name, fc->dev);
}

static struct lgdt330x_config air2pc_atsc_hd5000_config = {
	.demod_address       = 0x59,
	.demod_chip          = LGDT3303,
	.serial_mpeg         = 0x04,
	.clock_polarity_flip = 1,
};

static struct nxt200x_config samsung_tbmv_config = {
	.demod_address    = 0x0a,
};

static struct bcm3510_config air2pc_atsc_first_gen_config = {
	.demod_address    = 0x0f,
	.request_firmware = flexcop_fe_request_firmware,
};

static int skystar23_samsung_tbdu18132_tuner_set_params(struct dvb_frontend* fe, struct dvb_frontend_parameters *params)
{
	u8 buf[4];
	u32 div;
	struct i2c_msg msg = { .addr = 0x61, .flags = 0, .buf = buf, .len = sizeof(buf) };
	struct flexcop_device *fc = fe->dvb->priv;

	div = (params->frequency + (125/2)) / 125;

	buf[0] = (div >> 8) & 0x7f;
	buf[1] = (div >> 0) & 0xff;
	buf[2] = 0x84 | ((div >> 10) & 0x60);
	buf[3] = 0x80;

	if (params->frequency < 1550000)
		buf[3] |= 0x02;

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 1);
	if (i2c_transfer(&fc->fc_i2c_adap[0].i2c_adap, &msg, 1) != 1)
		return -EIO;
	return 0;
}

static struct mt312_config skystar23_samsung_tbdu18132_config = {

	.demod_address = 0x0e,
};

static int alps_tdee4_stv0297_tuner_set_params(struct dvb_frontend* fe,
					       struct dvb_frontend_parameters *fep)
{
	struct flexcop_device *fc = fe->dvb->priv;
	u8 buf[4];
	u16 div;
	int ret;

/*  62.5 kHz * 10 */
#define REF_FREQ    625
#define FREQ_OFFSET 36125

	div = ((fep->frequency/1000 + FREQ_OFFSET ) * 10)  / REF_FREQ; // 4 MHz = 4000 KHz

	buf[0] = (u8)( div >> 8) & 0x7f;
	buf[1] = (u8)        div & 0xff;

/* F(osc) = N * Reference Freq. (62.5 kHz)
 * byte 2 :  0 N14 N13 N12 N11 N10 N9  N8
 * byte 3 : N7 N6  N5  N4  N3  N2  N1  N0
 * byte 4 : 1  *   *   AGD R3  R2  R1  R0
 * byte 5 : C1 *   RE  RTS BS4 BS3 BS2 BS1
 * AGD = 1, R3 R2 R1 R0 = 0 1 0 1 => byte 4 = 1**10101 = 0x95 */
	buf[2] = 0x95;

// Range(MHz)  C1 *  RE RTS BS4 BS3 BS2 BS1  Byte 5
//  47 - 153   0  *  0   0   0   0   0   1   0x01
// 153 - 430   0  *  0   0   0   0   1   0   0x02
// 430 - 822   0  *  0   0   1   0   0   0   0x08
// 822 - 862   1  *  0   0   1   0   0   0   0x88

	     if (fep->frequency <= 153000000) buf[3] = 0x01;
	else if (fep->frequency <= 430000000) buf[3] = 0x02;
	else if (fep->frequency <= 822000000) buf[3] = 0x08;
	else buf[3] = 0x88;

	if (fe->ops.i2c_gate_ctrl)
		fe->ops.i2c_gate_ctrl(fe, 0);
	deb_tuner("tuner buffer for %d Hz: %x %x %x %x\n",fep->frequency, buf[0],buf[1],buf[2],buf[3]);
	ret = fc->i2c_request(&fc->fc_i2c_adap[2],
		FC_WRITE, 0x61, buf[0], &buf[1], 3);
	deb_tuner("tuner write returned: %d\n",ret);

	return ret;
}

static u8 alps_tdee4_stv0297_inittab[] = {
	0x80, 0x01,
	0x80, 0x00,
	0x81, 0x01,
	0x81, 0x00,
	0x00, 0x48,
	0x01, 0x58,
	0x03, 0x00,
	0x04, 0x00,
	0x07, 0x00,
	0x08, 0x00,
	0x30, 0xff,
	0x31, 0x9d,
	0x32, 0xff,
	0x33, 0x00,
	0x34, 0x29,
	0x35, 0x55,
	0x36, 0x80,
	0x37, 0x6e,
	0x38, 0x9c,
	0x40, 0x1a,
	0x41, 0xfe,
	0x42, 0x33,
	0x43, 0x00,
	0x44, 0xff,
	0x45, 0x00,
	0x46, 0x00,
	0x49, 0x04,
	0x4a, 0x51,
	0x4b, 0xf8,
	0x52, 0x30,
	0x53, 0x06,
	0x59, 0x06,
	0x5a, 0x5e,
	0x5b, 0x04,
	0x61, 0x49,
	0x62, 0x0a,
	0x70, 0xff,
	0x71, 0x04,
	0x72, 0x00,
	0x73, 0x00,
	0x74, 0x0c,
	0x80, 0x20,
	0x81, 0x00,
	0x82, 0x30,
	0x83, 0x00,
	0x84, 0x04,
	0x85, 0x22,
	0x86, 0x08,
	0x87, 0x1b,
	0x88, 0x00,
	0x89, 0x00,
	0x90, 0x00,
	0x91, 0x04,
	0xa0, 0x86,
	0xa1, 0x00,
	0xa2, 0x00,
	0xb0, 0x91,
	0xb1, 0x0b,
	0xc0, 0x5b,
	0xc1, 0x10,
	0xc2, 0x12,
	0xd0, 0x02,
	0xd1, 0x00,
	0xd2, 0x00,
	0xd3, 0x00,
	0xd4, 0x02,
	0xd5, 0x00,
	0xde, 0x00,
	0xdf, 0x01,
	0xff, 0xff,
};

static struct stv0297_config alps_tdee4_stv0297_config = {
	.demod_address = 0x1c,
	.inittab = alps_tdee4_stv0297_inittab,
//	.invert = 1,
//	.pll_set = alps_tdee4_stv0297_pll_set,
};


/* SkyStar2 rev2.7 (a/u) */
static struct s5h1420_config skystar2_rev2_7_s5h1420_config = {
	.demod_address = 0x53,
	.invert = 1,
	.repeated_start_workaround = 1,
	.serial_mpeg = 1,
};

static struct itd1000_config skystar2_rev2_7_itd1000_config = {
	.i2c_address = 0x61,
};

/* SkyStar2 rev2.8 */
static struct cx24123_config skystar2_rev2_8_cx24123_config = {
	.demod_address = 0x55,
	.dont_use_pll = 1,
	.agc_callback = cx24113_agc_callback,
};

static const struct cx24113_config skystar2_rev2_8_cx24113_config = {
	.i2c_addr = 0x54,
	.xtal_khz = 10111,
};

/* try to figure out the frontend, each card/box can have on of the following list */
int flexcop_frontend_init(struct flexcop_device *fc)
{
	struct dvb_frontend_ops *ops;
	struct i2c_adapter *i2c = &fc->fc_i2c_adap[0].i2c_adap;
	struct i2c_adapter *i2c_tuner;

	/* enable no_base_addr - no repeated start when reading */
	fc->fc_i2c_adap[0].no_base_addr = 1;
	fc->fe = dvb_attach(s5h1420_attach, &skystar2_rev2_7_s5h1420_config, i2c);
	if (fc->fe != NULL) {
		flexcop_ibi_value r108;
		i2c_tuner = s5h1420_get_tuner_i2c_adapter(fc->fe);
		ops = &fc->fe->ops;

		fc->fe_sleep = ops->sleep;
		ops->sleep   = flexcop_sleep;

		fc->dev_type = FC_SKY_REV27;

		/* enable no_base_addr - no repeated start when reading */
		fc->fc_i2c_adap[2].no_base_addr = 1;
		if (dvb_attach(isl6421_attach, fc->fe, &fc->fc_i2c_adap[2].i2c_adap, 0x08, 1, 1) == NULL)
			err("ISL6421 could NOT be attached");
		else
			info("ISL6421 successfully attached");

		/* the ITD1000 requires a lower i2c clock - it slows down the stuff for everyone - but is it a problem ? */
		r108.raw = 0x00000506;
		fc->write_ibi_reg(fc, tw_sm_c_108, r108);
		if (i2c_tuner) {
			if (dvb_attach(itd1000_attach, fc->fe, i2c_tuner, &skystar2_rev2_7_itd1000_config) == NULL)
				err("ITD1000 could NOT be attached");
			else
				info("ITD1000 successfully attached");
		}
		goto fe_found;
	}
	fc->fc_i2c_adap[0].no_base_addr = 0; /* for the next devices we need it again */

	/* try the sky v2.8 (cx24123, isl6421) */
	fc->fe = dvb_attach(cx24123_attach,
		&skystar2_rev2_8_cx24123_config, i2c);
	if (fc->fe != NULL) {
		i2c_tuner = cx24123_get_tuner_i2c_adapter(fc->fe);
		if (i2c_tuner != NULL) {
			if (dvb_attach(cx24113_attach, fc->fe,
					&skystar2_rev2_8_cx24113_config,
					i2c_tuner) == NULL)
				err("CX24113 could NOT be attached");
			else
				info("CX24113 successfully attached");
		}

		fc->dev_type = FC_SKY_REV28;

		fc->fc_i2c_adap[2].no_base_addr = 1;
		if (dvb_attach(isl6421_attach, fc->fe,
		       &fc->fc_i2c_adap[2].i2c_adap, 0x08, 0, 0) == NULL)
			err("ISL6421 could NOT be attached");
		else
			info("ISL6421 successfully attached");

		/* TODO on i2c_adap[1] addr 0x11 (EEPROM) there seems to be an
		 * IR-receiver (PIC16F818) - but the card has no input for
		 * that ??? */

		goto fe_found;
    }

	/* try the sky v2.6 (stv0299/Samsung tbmu24112(sl1935)) */
	fc->fe = dvb_attach(stv0299_attach, &samsung_tbmu24112_config, i2c);
	if (fc->fe != NULL) {
		ops = &fc->fe->ops;

		ops->tuner_ops.set_params = samsung_tbmu24112_tuner_set_params;

		ops->set_voltage = flexcop_set_voltage;

		fc->fe_sleep = ops->sleep;
		ops->sleep = flexcop_sleep;

		fc->dev_type = FC_SKY;
		goto fe_found;
	}

	/* try the air dvb-t (mt352/Samsung tdtc9251dh0(??)) */
	fc->fe = dvb_attach(mt352_attach, &samsung_tdtc9251dh0_config, i2c);
	if (fc->fe != NULL) {
		fc->dev_type = FC_AIR_DVB;
		fc->fe->ops.tuner_ops.calc_regs = samsung_tdtc9251dh0_calc_regs;
		goto fe_found;
	}

	/* try the air atsc 2nd generation (nxt2002) */
	fc->fe = dvb_attach(nxt200x_attach, &samsung_tbmv_config, i2c);
	if (fc->fe != NULL) {
		fc->dev_type = FC_AIR_ATSC2;
		dvb_attach(dvb_pll_attach, fc->fe, 0x61, NULL, DVB_PLL_SAMSUNG_TBMV);
		goto fe_found;
	}

	fc->fe = dvb_attach(lgdt330x_attach, &air2pc_atsc_hd5000_config, i2c);
	if (fc->fe != NULL) {
		fc->dev_type = FC_AIR_ATSC3;
		dvb_attach(simple_tuner_attach, fc->fe, i2c, 0x61,
				TUNER_LG_TDVS_H06XF);
		goto fe_found;
	}

	/* try the air atsc 1nd generation (bcm3510)/panasonic ct10s */
	fc->fe = dvb_attach(bcm3510_attach, &air2pc_atsc_first_gen_config, i2c);
	if (fc->fe != NULL) {
		fc->dev_type = FC_AIR_ATSC1;
		goto fe_found;
	}

	/* try the cable dvb (stv0297) */
	fc->fc_i2c_adap[0].no_base_addr = 1;
	fc->fe = dvb_attach(stv0297_attach, &alps_tdee4_stv0297_config, i2c);
	if (fc->fe != NULL) {
		fc->dev_type = FC_CABLE;
		fc->fe->ops.tuner_ops.set_params = alps_tdee4_stv0297_tuner_set_params;
		goto fe_found;
	}
	fc->fc_i2c_adap[0].no_base_addr = 0;

	/* try the sky v2.3 (vp310/Samsung tbdu18132(tsa5059)) */
	fc->fe = dvb_attach(mt312_attach,
		&skystar23_samsung_tbdu18132_config, i2c);
	if (fc->fe != NULL) {
		ops = &fc->fe->ops;

		ops->tuner_ops.set_params = skystar23_samsung_tbdu18132_tuner_set_params;

		ops->diseqc_send_master_cmd = flexcop_diseqc_send_master_cmd;
		ops->diseqc_send_burst      = flexcop_diseqc_send_burst;
		ops->set_tone               = flexcop_set_tone;
		ops->set_voltage            = flexcop_set_voltage;

		fc->fe_sleep                = ops->sleep;
		ops->sleep                  = flexcop_sleep;

		fc->dev_type                = FC_SKY_OLD;
		goto fe_found;
	}

	err("no frontend driver found for this B2C2/FlexCop adapter");
	return -ENODEV;

fe_found:
	info("found '%s' .", fc->fe->ops.info.name);
	if (dvb_register_frontend(&fc->dvb_adapter, fc->fe)) {
		err("frontend registration failed!");
		ops = &fc->fe->ops;
		if (ops->release != NULL)
			ops->release(fc->fe);
		fc->fe = NULL;
		return -EINVAL;
	}
	fc->init_state |= FC_STATE_FE_INIT;
	return 0;
}

void flexcop_frontend_exit(struct flexcop_device *fc)
{
	if (fc->init_state & FC_STATE_FE_INIT) {
		dvb_unregister_frontend(fc->fe);
		dvb_frontend_detach(fc->fe);
	}

	fc->init_state &= ~FC_STATE_FE_INIT;
}