summaryrefslogtreecommitdiffstats
path: root/drivers/media/usb/dvb-usb/technisat-usb2.c
blob: c659e18b358b88db8b7ce31836bab9e784a4dfa4 (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
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
/*
 * Linux driver for Technisat DVB-S/S2 USB 2.0 device
 *
 * Copyright (C) 2010 Patrick Boettcher,
 *                    Kernel Labs Inc. PO Box 745, St James, NY 11780
 *
 * Development was sponsored by Technisat Digital UK Limited, whose
 * registered office is Witan Gate House 500 - 600 Witan Gate West,
 * Milton Keynes, MK9 1SH
 *
 * 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 PROVIDED "AS IS" AND BOTH THE COPYRIGHT HOLDER AND
 * TECHNISAT DIGITAL UK LTD DISCLAIM ALL WARRANTIES WITH REGARD TO
 * THIS PROGRAM INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR
 * FITNESS FOR A PARTICULAR PURPOSE.  NEITHER THE COPYRIGHT HOLDER
 * NOR TECHNISAT DIGITAL UK LIMITED SHALL BE LIABLE FOR ANY SPECIAL,
 * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
 * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
 * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS PROGRAM. See the
 * GNU General Public License for more details.
 */

#define DVB_USB_LOG_PREFIX "technisat-usb2"
#include "dvb-usb.h"

#include "stv6110x.h"
#include "stv090x.h"

/* module parameters */
DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug,
		"set debugging level (bit-mask: 1=info,2=eeprom,4=i2c,8=rc)." \
		DVB_USB_DEBUG_STATUS);

/* disables all LED control command and
 * also does not start the signal polling thread */
static int disable_led_control;
module_param(disable_led_control, int, 0444);
MODULE_PARM_DESC(disable_led_control,
		"disable LED control of the device (default: 0 - LED control is active).");

/* device private data */
struct technisat_usb2_state {
	struct dvb_usb_device *dev;
	struct delayed_work green_led_work;
	u8 power_state;

	u16 last_scan_code;

	u8 buf[64];
};

/* debug print helpers */
#define deb_info(args...)    dprintk(debug, 0x01, args)
#define deb_eeprom(args...)  dprintk(debug, 0x02, args)
#define deb_i2c(args...)     dprintk(debug, 0x04, args)
#define deb_rc(args...)      dprintk(debug, 0x08, args)

/* vendor requests */
#define SET_IFCLK_TO_EXTERNAL_TSCLK_VENDOR_REQUEST 0xB3
#define SET_FRONT_END_RESET_VENDOR_REQUEST         0xB4
#define GET_VERSION_INFO_VENDOR_REQUEST            0xB5
#define SET_GREEN_LED_VENDOR_REQUEST               0xB6
#define SET_RED_LED_VENDOR_REQUEST                 0xB7
#define GET_IR_DATA_VENDOR_REQUEST                 0xB8
#define SET_LED_TIMER_DIVIDER_VENDOR_REQUEST       0xB9
#define SET_USB_REENUMERATION                      0xBA

/* i2c-access methods */
#define I2C_SPEED_100KHZ_BIT 0x40

#define I2C_STATUS_NAK 7
#define I2C_STATUS_OK 8

static int technisat_usb2_i2c_access(struct usb_device *udev,
		u8 device_addr, u8 *tx, u8 txlen, u8 *rx, u8 rxlen)
{
	u8 *b;
	int ret, actual_length;

	b = kmalloc(64, GFP_KERNEL);
	if (!b)
		return -ENOMEM;

	deb_i2c("i2c-access: %02x, tx: ", device_addr);
	debug_dump(tx, txlen, deb_i2c);
	deb_i2c(" ");

	if (txlen > 62) {
		err("i2c TX buffer can't exceed 62 bytes (dev 0x%02x)",
				device_addr);
		txlen = 62;
	}
	if (rxlen > 62) {
		err("i2c RX buffer can't exceed 62 bytes (dev 0x%02x)",
				device_addr);
		rxlen = 62;
	}

	b[0] = I2C_SPEED_100KHZ_BIT;
	b[1] = device_addr << 1;

	if (rx != NULL) {
		b[0] |= rxlen;
		b[1] |= 1;
	}

	memcpy(&b[2], tx, txlen);
	ret = usb_bulk_msg(udev,
			usb_sndbulkpipe(udev, 0x01),
			b, 2 + txlen,
			NULL, 1000);

	if (ret < 0) {
		err("i2c-error: out failed %02x = %d", device_addr, ret);
		goto err;
	}

	ret = usb_bulk_msg(udev,
			usb_rcvbulkpipe(udev, 0x01),
			b, 64, &actual_length, 1000);
	if (ret < 0) {
		err("i2c-error: in failed %02x = %d", device_addr, ret);
		goto err;
	}

	if (b[0] != I2C_STATUS_OK) {
		err("i2c-error: %02x = %d", device_addr, b[0]);
		/* handle tuner-i2c-nak */
		if (!(b[0] == I2C_STATUS_NAK &&
				device_addr == 0x60
				/* && device_is_technisat_usb2 */))
			goto err;
	}

	deb_i2c("status: %d, ", b[0]);

	if (rx != NULL) {
		memcpy(rx, &b[2], rxlen);

		deb_i2c("rx (%d): ", rxlen);
		debug_dump(rx, rxlen, deb_i2c);
	}

	deb_i2c("\n");

err:
	kfree(b);
	return ret;
}

static int technisat_usb2_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg *msg,
				int num)
{
	int ret = 0, i;
	struct dvb_usb_device *d = i2c_get_adapdata(adap);

	/* Ensure nobody else hits the i2c bus while we're sending our
	   sequence of messages, (such as the remote control thread) */
	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
		return -EAGAIN;

	for (i = 0; i < num; i++) {
		if (i+1 < num && msg[i+1].flags & I2C_M_RD) {
			ret = technisat_usb2_i2c_access(d->udev, msg[i+1].addr,
						msg[i].buf, msg[i].len,
						msg[i+1].buf, msg[i+1].len);
			if (ret != 0)
				break;
			i++;
		} else {
			ret = technisat_usb2_i2c_access(d->udev, msg[i].addr,
						msg[i].buf, msg[i].len,
						NULL, 0);
			if (ret != 0)
				break;
		}
	}

	if (ret == 0)
		ret = i;

	mutex_unlock(&d->i2c_mutex);

	return ret;
}

static u32 technisat_usb2_i2c_func(struct i2c_adapter *adapter)
{
	return I2C_FUNC_I2C;
}

static struct i2c_algorithm technisat_usb2_i2c_algo = {
	.master_xfer   = technisat_usb2_i2c_xfer,
	.functionality = technisat_usb2_i2c_func,
};

#if 0
static void technisat_usb2_frontend_reset(struct usb_device *udev)
{
	usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
			SET_FRONT_END_RESET_VENDOR_REQUEST,
			USB_TYPE_VENDOR | USB_DIR_OUT,
			10, 0,
			NULL, 0, 500);
}
#endif

/* LED control */
enum technisat_usb2_led_state {
	TECH_LED_OFF,
	TECH_LED_BLINK,
	TECH_LED_ON,
	TECH_LED_UNDEFINED
};

static int technisat_usb2_set_led(struct dvb_usb_device *d, int red,
				  enum technisat_usb2_led_state st)
{
	struct technisat_usb2_state *state = d->priv;
	u8 *led = state->buf;
	int ret;

	led[0] = red ? SET_RED_LED_VENDOR_REQUEST : SET_GREEN_LED_VENDOR_REQUEST;

	if (disable_led_control && st != TECH_LED_OFF)
		return 0;

	switch (st) {
	case TECH_LED_ON:
		led[1] = 0x82;
		break;
	case TECH_LED_BLINK:
		led[1] = 0x82;
		if (red) {
			led[2] = 0x02;
			led[3] = 10;
			led[4] = 10;
		} else {
			led[2] = 0xff;
			led[3] = 50;
			led[4] = 50;
		}
		led[5] = 1;
		break;

	default:
	case TECH_LED_OFF:
		led[1] = 0x80;
		break;
	}

	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
		return -EAGAIN;

	ret = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev, 0),
		red ? SET_RED_LED_VENDOR_REQUEST : SET_GREEN_LED_VENDOR_REQUEST,
		USB_TYPE_VENDOR | USB_DIR_OUT,
		0, 0,
		led, 8, 500);

	mutex_unlock(&d->i2c_mutex);
	return ret;
}

static int technisat_usb2_set_led_timer(struct dvb_usb_device *d, u8 red, u8 green)
{
	struct technisat_usb2_state *state = d->priv;
	u8 *b = state->buf;
	int ret;

	b[0] = 0;

	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
		return -EAGAIN;

	ret = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev, 0),
		SET_LED_TIMER_DIVIDER_VENDOR_REQUEST,
		USB_TYPE_VENDOR | USB_DIR_OUT,
		(red << 8) | green, 0,
		b, 1, 500);

	mutex_unlock(&d->i2c_mutex);

	return ret;
}

static void technisat_usb2_green_led_control(struct work_struct *work)
{
	struct technisat_usb2_state *state =
		container_of(work, struct technisat_usb2_state, green_led_work.work);
	struct dvb_frontend *fe = state->dev->adapter[0].fe_adap[0].fe;

	if (state->power_state == 0)
		goto schedule;

	if (fe != NULL) {
		enum fe_status status;

		if (fe->ops.read_status(fe, &status) != 0)
			goto schedule;

		if (status & FE_HAS_LOCK) {
			u32 ber;

			if (fe->ops.read_ber(fe, &ber) != 0)
				goto schedule;

			if (ber > 1000)
				technisat_usb2_set_led(state->dev, 0, TECH_LED_BLINK);
			else
				technisat_usb2_set_led(state->dev, 0, TECH_LED_ON);
		} else
			technisat_usb2_set_led(state->dev, 0, TECH_LED_OFF);
	}

schedule:
	schedule_delayed_work(&state->green_led_work,
			msecs_to_jiffies(500));
}

/* method to find out whether the firmware has to be downloaded or not */
static int technisat_usb2_identify_state(struct usb_device *udev,
		struct dvb_usb_device_properties *props,
		struct dvb_usb_device_description **desc, int *cold)
{
	int ret;
	u8 *version;

	version = kmalloc(3, GFP_KERNEL);
	if (!version)
		return -ENOMEM;

	/* first select the interface */
	if (usb_set_interface(udev, 0, 1) != 0)
		err("could not set alternate setting to 0");
	else
		info("set alternate setting");

	*cold = 0; /* by default do not download a firmware - just in case something is wrong */

	ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
		GET_VERSION_INFO_VENDOR_REQUEST,
		USB_TYPE_VENDOR | USB_DIR_IN,
		0, 0,
		version, 3, 500);

	if (ret < 0)
		*cold = 1;
	else {
		info("firmware version: %d.%d", version[1], version[2]);
		*cold = 0;
	}

	kfree(version);

	return 0;
}

/* power control */
static int technisat_usb2_power_ctrl(struct dvb_usb_device *d, int level)
{
	struct technisat_usb2_state *state = d->priv;

	state->power_state = level;

	if (disable_led_control)
		return 0;

	/* green led is turned off in any case - will be turned on when tuning */
	technisat_usb2_set_led(d, 0, TECH_LED_OFF);
	/* red led is turned on all the time */
	technisat_usb2_set_led(d, 1, TECH_LED_ON);
	return 0;
}

/* mac address reading - from the eeprom */
#if 0
static void technisat_usb2_eeprom_dump(struct dvb_usb_device *d)
{
	u8 reg;
	u8 b[16];
	int i, j;

	/* full EEPROM dump */
	for (j = 0; j < 256 * 4; j += 16) {
		reg = j;
		if (technisat_usb2_i2c_access(d->udev, 0x50 + j / 256, &reg, 1, b, 16) != 0)
			break;

		deb_eeprom("EEPROM: %01x%02x: ", j / 256, reg);
		for (i = 0; i < 16; i++)
			deb_eeprom("%02x ", b[i]);
		deb_eeprom("\n");
	}
}
#endif

static u8 technisat_usb2_calc_lrc(const u8 *b, u16 length)
{
	u8 lrc = 0;
	while (--length)
		lrc ^= *b++;
	return lrc;
}

static int technisat_usb2_eeprom_lrc_read(struct dvb_usb_device *d,
	u16 offset, u8 *b, u16 length, u8 tries)
{
	u8 bo = offset & 0xff;
	struct i2c_msg msg[] = {
		{
			.addr = 0x50 | ((offset >> 8) & 0x3),
			.buf = &bo,
			.len = 1
		}, {
			.addr = 0x50 | ((offset >> 8) & 0x3),
			.flags	= I2C_M_RD,
			.buf = b,
			.len = length
		}
	};

	while (tries--) {
		int status;

		if (i2c_transfer(&d->i2c_adap, msg, 2) != 2)
			break;

		status =
			technisat_usb2_calc_lrc(b, length - 1) == b[length - 1];

		if (status)
			return 0;
	}

	return -EREMOTEIO;
}

#define EEPROM_MAC_START 0x3f8
#define EEPROM_MAC_TOTAL 8
static int technisat_usb2_read_mac_address(struct dvb_usb_device *d,
		u8 mac[])
{
	u8 buf[EEPROM_MAC_TOTAL];

	if (technisat_usb2_eeprom_lrc_read(d, EEPROM_MAC_START,
				buf, EEPROM_MAC_TOTAL, 4) != 0)
		return -ENODEV;

	memcpy(mac, buf, 6);
	return 0;
}

static struct stv090x_config technisat_usb2_stv090x_config;

/* frontend attach */
static int technisat_usb2_set_voltage(struct dvb_frontend *fe,
				      enum fe_sec_voltage voltage)
{
	int i;
	u8 gpio[3] = { 0 }; /* 0 = 2, 1 = 3, 2 = 4 */

	gpio[2] = 1; /* high - voltage ? */

	switch (voltage) {
	case SEC_VOLTAGE_13:
		gpio[0] = 1;
		break;
	case SEC_VOLTAGE_18:
		gpio[0] = 1;
		gpio[1] = 1;
		break;
	default:
	case SEC_VOLTAGE_OFF:
		break;
	}

	for (i = 0; i < 3; i++)
		if (technisat_usb2_stv090x_config.set_gpio(fe, i+2, 0,
							   gpio[i], 0) != 0)
			return -EREMOTEIO;
	return 0;
}

static struct stv090x_config technisat_usb2_stv090x_config = {
	.device         = STV0903,
	.demod_mode     = STV090x_SINGLE,
	.clk_mode       = STV090x_CLK_EXT,

	.xtal           = 8000000,
	.address        = 0x68,

	.ts1_mode       = STV090x_TSMODE_DVBCI,
	.ts1_clk        = 13400000,
	.ts1_tei        = 1,

	.repeater_level = STV090x_RPTLEVEL_64,

	.tuner_bbgain   = 6,
};

static struct stv6110x_config technisat_usb2_stv6110x_config = {
	.addr           = 0x60,
	.refclk         = 16000000,
	.clk_div        = 2,
};

static int technisat_usb2_frontend_attach(struct dvb_usb_adapter *a)
{
	struct usb_device *udev = a->dev->udev;
	int ret;

	a->fe_adap[0].fe = dvb_attach(stv090x_attach, &technisat_usb2_stv090x_config,
			&a->dev->i2c_adap, STV090x_DEMODULATOR_0);

	if (a->fe_adap[0].fe) {
		const struct stv6110x_devctl *ctl;

		ctl = dvb_attach(stv6110x_attach,
				a->fe_adap[0].fe,
				&technisat_usb2_stv6110x_config,
				&a->dev->i2c_adap);

		if (ctl) {
			technisat_usb2_stv090x_config.tuner_init          = ctl->tuner_init;
			technisat_usb2_stv090x_config.tuner_sleep         = ctl->tuner_sleep;
			technisat_usb2_stv090x_config.tuner_set_mode      = ctl->tuner_set_mode;
			technisat_usb2_stv090x_config.tuner_set_frequency = ctl->tuner_set_frequency;
			technisat_usb2_stv090x_config.tuner_get_frequency = ctl->tuner_get_frequency;
			technisat_usb2_stv090x_config.tuner_set_bandwidth = ctl->tuner_set_bandwidth;
			technisat_usb2_stv090x_config.tuner_get_bandwidth = ctl->tuner_get_bandwidth;
			technisat_usb2_stv090x_config.tuner_set_bbgain    = ctl->tuner_set_bbgain;
			technisat_usb2_stv090x_config.tuner_get_bbgain    = ctl->tuner_get_bbgain;
			technisat_usb2_stv090x_config.tuner_set_refclk    = ctl->tuner_set_refclk;
			technisat_usb2_stv090x_config.tuner_get_status    = ctl->tuner_get_status;

			/* call the init function once to initialize
			   tuner's clock output divider and demod's
			   master clock */
			if (a->fe_adap[0].fe->ops.init)
				a->fe_adap[0].fe->ops.init(a->fe_adap[0].fe);

			if (mutex_lock_interruptible(&a->dev->i2c_mutex) < 0)
				return -EAGAIN;

			ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
					SET_IFCLK_TO_EXTERNAL_TSCLK_VENDOR_REQUEST,
					USB_TYPE_VENDOR | USB_DIR_OUT,
					0, 0,
					NULL, 0, 500);
			mutex_unlock(&a->dev->i2c_mutex);

			if (ret != 0)
				err("could not set IF_CLK to external");

			a->fe_adap[0].fe->ops.set_voltage = technisat_usb2_set_voltage;

			/* if everything was successful assign a nice name to the frontend */
			strscpy(a->fe_adap[0].fe->ops.info.name,
				a->dev->desc->name,
				sizeof(a->fe_adap[0].fe->ops.info.name));
		} else {
			dvb_frontend_detach(a->fe_adap[0].fe);
			a->fe_adap[0].fe = NULL;
		}
	}

	technisat_usb2_set_led_timer(a->dev, 1, 1);

	return a->fe_adap[0].fe == NULL ? -ENODEV : 0;
}

/* Remote control */

/* the device is giving providing raw IR-signals to the host mapping
 * it only to one remote control is just the default implementation
 */
#define NOMINAL_IR_BIT_TRANSITION_TIME_US 889
#define NOMINAL_IR_BIT_TIME_US (2 * NOMINAL_IR_BIT_TRANSITION_TIME_US)

#define FIRMWARE_CLOCK_TICK 83333
#define FIRMWARE_CLOCK_DIVISOR 256

#define IR_PERCENT_TOLERANCE 15

#define NOMINAL_IR_BIT_TRANSITION_TICKS ((NOMINAL_IR_BIT_TRANSITION_TIME_US * 1000 * 1000) / FIRMWARE_CLOCK_TICK)
#define NOMINAL_IR_BIT_TRANSITION_TICK_COUNT (NOMINAL_IR_BIT_TRANSITION_TICKS / FIRMWARE_CLOCK_DIVISOR)

#define NOMINAL_IR_BIT_TIME_TICKS ((NOMINAL_IR_BIT_TIME_US * 1000 * 1000) / FIRMWARE_CLOCK_TICK)
#define NOMINAL_IR_BIT_TIME_TICK_COUNT (NOMINAL_IR_BIT_TIME_TICKS / FIRMWARE_CLOCK_DIVISOR)

#define MINIMUM_IR_BIT_TRANSITION_TICK_COUNT (NOMINAL_IR_BIT_TRANSITION_TICK_COUNT - ((NOMINAL_IR_BIT_TRANSITION_TICK_COUNT * IR_PERCENT_TOLERANCE) / 100))
#define MAXIMUM_IR_BIT_TRANSITION_TICK_COUNT (NOMINAL_IR_BIT_TRANSITION_TICK_COUNT + ((NOMINAL_IR_BIT_TRANSITION_TICK_COUNT * IR_PERCENT_TOLERANCE) / 100))

#define MINIMUM_IR_BIT_TIME_TICK_COUNT (NOMINAL_IR_BIT_TIME_TICK_COUNT - ((NOMINAL_IR_BIT_TIME_TICK_COUNT * IR_PERCENT_TOLERANCE) / 100))
#define MAXIMUM_IR_BIT_TIME_TICK_COUNT (NOMINAL_IR_BIT_TIME_TICK_COUNT + ((NOMINAL_IR_BIT_TIME_TICK_COUNT * IR_PERCENT_TOLERANCE) / 100))

static int technisat_usb2_get_ir(struct dvb_usb_device *d)
{
	struct technisat_usb2_state *state = d->priv;
	u8 *buf = state->buf;
	u8 *b;
	int ret;
	struct ir_raw_event ev;

	buf[0] = GET_IR_DATA_VENDOR_REQUEST;
	buf[1] = 0x08;
	buf[2] = 0x8f;
	buf[3] = MINIMUM_IR_BIT_TRANSITION_TICK_COUNT;
	buf[4] = MAXIMUM_IR_BIT_TIME_TICK_COUNT;

	if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
		return -EAGAIN;
	ret = usb_control_msg(d->udev, usb_sndctrlpipe(d->udev, 0),
			GET_IR_DATA_VENDOR_REQUEST,
			USB_TYPE_VENDOR | USB_DIR_OUT,
			0, 0,
			buf, 5, 500);
	if (ret < 0)
		goto unlock;

	buf[1] = 0;
	buf[2] = 0;
	ret = usb_control_msg(d->udev, usb_rcvctrlpipe(d->udev, 0),
			GET_IR_DATA_VENDOR_REQUEST,
			USB_TYPE_VENDOR | USB_DIR_IN,
			0x8080, 0,
			buf, 62, 500);

unlock:
	mutex_unlock(&d->i2c_mutex);

	if (ret < 0)
		return ret;

	if (ret == 1)
		return 0; /* no key pressed */

	/* decoding */
	b = buf+1;

#if 0
	deb_rc("RC: %d ", ret);
	debug_dump(b, ret, deb_rc);
#endif

	ev.pulse = 0;
	while (1) {
		ev.pulse = !ev.pulse;
		ev.duration = (*b * FIRMWARE_CLOCK_DIVISOR * FIRMWARE_CLOCK_TICK) / 1000;
		ir_raw_event_store(d->rc_dev, &ev);

		b++;
		if (*b == 0xff) {
			ev.pulse = 0;
			ev.duration = 888888*2;
			ir_raw_event_store(d->rc_dev, &ev);
			break;
		}
	}

	ir_raw_event_handle(d->rc_dev);

	return 1;
}

static int technisat_usb2_rc_query(struct dvb_usb_device *d)
{
	int ret = technisat_usb2_get_ir(d);

	if (ret < 0)
		return ret;

	if (ret == 0)
		return 0;

	if (!disable_led_control)
		technisat_usb2_set_led(d, 1, TECH_LED_BLINK);

	return 0;
}

/* DVB-USB and USB stuff follows */
static struct usb_device_id technisat_usb2_id_table[] = {
	{ USB_DEVICE(USB_VID_TECHNISAT, USB_PID_TECHNISAT_USB2_DVB_S2) },
	{ 0 }		/* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, technisat_usb2_id_table);

/* device description */
static struct dvb_usb_device_properties technisat_usb2_devices = {
	.caps              = DVB_USB_IS_AN_I2C_ADAPTER,

	.usb_ctrl          = CYPRESS_FX2,

	.identify_state    = technisat_usb2_identify_state,
	.firmware          = "dvb-usb-SkyStar_USB_HD_FW_v17_63.HEX.fw",

	.size_of_priv      = sizeof(struct technisat_usb2_state),

	.i2c_algo          = &technisat_usb2_i2c_algo,

	.power_ctrl        = technisat_usb2_power_ctrl,
	.read_mac_address  = technisat_usb2_read_mac_address,

	.num_adapters = 1,
	.adapter = {
		{
		.num_frontends = 1,
		.fe = {{
			.frontend_attach  = technisat_usb2_frontend_attach,

			.stream = {
				.type = USB_ISOC,
				.count = 4,
				.endpoint = 0x2,
				.u = {
					.isoc = {
						.framesperurb = 32,
						.framesize = 2048,
						.interval = 1,
					}
				}
			},
		}},
			.size_of_priv = 0,
		},
	},

	.num_device_descs = 1,
	.devices = {
		{   "Technisat SkyStar USB HD (DVB-S/S2)",
			{ &technisat_usb2_id_table[0], NULL },
			{ NULL },
		},
	},

	.rc.core = {
		.rc_interval = 100,
		.rc_codes    = RC_MAP_TECHNISAT_USB2,
		.module_name = "technisat-usb2",
		.rc_query    = technisat_usb2_rc_query,
		.allowed_protos = RC_PROTO_BIT_ALL_IR_DECODER,
		.driver_type    = RC_DRIVER_IR_RAW,
	}
};

static int technisat_usb2_probe(struct usb_interface *intf,
		const struct usb_device_id *id)
{
	struct dvb_usb_device *dev;

	if (dvb_usb_device_init(intf, &technisat_usb2_devices, THIS_MODULE,
				&dev, adapter_nr) != 0)
		return -ENODEV;

	if (dev) {
		struct technisat_usb2_state *state = dev->priv;
		state->dev = dev;

		if (!disable_led_control) {
			INIT_DELAYED_WORK(&state->green_led_work,
					technisat_usb2_green_led_control);
			schedule_delayed_work(&state->green_led_work,
					msecs_to_jiffies(500));
		}
	}

	return 0;
}

static void technisat_usb2_disconnect(struct usb_interface *intf)
{
	struct dvb_usb_device *dev = usb_get_intfdata(intf);

	/* work and stuff was only created when the device is is hot-state */
	if (dev != NULL) {
		struct technisat_usb2_state *state = dev->priv;
		if (state != NULL)
			cancel_delayed_work_sync(&state->green_led_work);
	}

	dvb_usb_device_exit(intf);
}

static struct usb_driver technisat_usb2_driver = {
	.name       = "dvb_usb_technisat_usb2",
	.probe      = technisat_usb2_probe,
	.disconnect = technisat_usb2_disconnect,
	.id_table   = technisat_usb2_id_table,
};

module_usb_driver(technisat_usb2_driver);

MODULE_AUTHOR("Patrick Boettcher <pboettcher@kernellabs.com>");
MODULE_DESCRIPTION("Driver for Technisat DVB-S/S2 USB 2.0 device");
MODULE_VERSION("1.0");
MODULE_LICENSE("GPL");