summaryrefslogtreecommitdiffstats
path: root/drivers/media/pci/ttpci/budget-patch.c
blob: 591dbdfa2a139e8e400aebdabbbcf006832c9a60 (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
/*
 * budget-patch.c: driver for Budget Patch,
 * hardware modification of DVB-S cards enabling full TS
 *
 * Written by Emard <emard@softhome.net>
 *
 * Original idea by Roberto Deza <rdeza@unav.es>
 *
 * Special thanks to Holger Waechtler, Michael Hunold, Marian Durkovic
 * and Metzlerbros
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
 *
 *
 * the project's page is at https://linuxtv.org
 */

#include "av7110.h"
#include "av7110_hw.h"
#include "budget.h"
#include "stv0299.h"
#include "ves1x93.h"
#include "tda8083.h"

#include "bsru6.h"

DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);

#define budget_patch budget

static struct saa7146_extension budget_extension;

MAKE_BUDGET_INFO(ttbp, "TT-Budget/Patch DVB-S 1.x PCI", BUDGET_PATCH);
//MAKE_BUDGET_INFO(satel,"TT-Budget/Patch SATELCO PCI", BUDGET_TT_HW_DISEQC);

static struct pci_device_id pci_tbl[] = {
	MAKE_EXTENSION_PCI(ttbp,0x13c2, 0x0000),
//        MAKE_EXTENSION_PCI(satel, 0x13c2, 0x1013),
	{
		.vendor    = 0,
	}
};

/* those lines are for budget-patch to be tried
** on a true budget card and observe the
** behaviour of VSYNC generated by rps1.
** this code was shamelessly copy/pasted from budget.c
*/
static void gpio_Set22K (struct budget *budget, int state)
{
	struct saa7146_dev *dev=budget->dev;
	dprintk(2, "budget: %p\n", budget);
	saa7146_setgpio(dev, 3, (state ? SAA7146_GPIO_OUTHI : SAA7146_GPIO_OUTLO));
}

/* Diseqc functions only for TT Budget card */
/* taken from the Skyvision DVB driver by
   Ralph Metzler <rjkm@metzlerbros.de> */

static void DiseqcSendBit (struct budget *budget, int data)
{
	struct saa7146_dev *dev=budget->dev;
	dprintk(2, "budget: %p\n", budget);

	saa7146_setgpio(dev, 3, SAA7146_GPIO_OUTHI);
	udelay(data ? 500 : 1000);
	saa7146_setgpio(dev, 3, SAA7146_GPIO_OUTLO);
	udelay(data ? 1000 : 500);
}

static void DiseqcSendByte (struct budget *budget, int data)
{
	int i, par=1, d;

	dprintk(2, "budget: %p\n", budget);

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

	DiseqcSendBit(budget, par);
}

static int SendDiSEqCMsg (struct budget *budget, int len, u8 *msg, unsigned long burst)
{
	struct saa7146_dev *dev=budget->dev;
	int i;

	dprintk(2, "budget: %p\n", budget);

	saa7146_setgpio(dev, 3, SAA7146_GPIO_OUTLO);
	mdelay(16);

	for (i=0; i<len; i++)
		DiseqcSendByte(budget, msg[i]);

	mdelay(16);

	if (burst!=-1) {
		if (burst)
			DiseqcSendByte(budget, 0xff);
		else {
			saa7146_setgpio(dev, 3, SAA7146_GPIO_OUTHI);
			mdelay(12);
			udelay(500);
			saa7146_setgpio(dev, 3, SAA7146_GPIO_OUTLO);
		}
		msleep(20);
	}

	return 0;
}

/* shamelessly copy/pasted from budget.c */
static int budget_set_tone(struct dvb_frontend *fe,
			   enum fe_sec_tone_mode tone)
{
	struct budget* budget = (struct budget*) fe->dvb->priv;

	switch (tone) {
	case SEC_TONE_ON:
		gpio_Set22K (budget, 1);
		break;

	case SEC_TONE_OFF:
		gpio_Set22K (budget, 0);
		break;

	default:
		return -EINVAL;
	}

	return 0;
}

static int budget_diseqc_send_master_cmd(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd* cmd)
{
	struct budget* budget = (struct budget*) fe->dvb->priv;

	SendDiSEqCMsg (budget, cmd->msg_len, cmd->msg, 0);

	return 0;
}

static int budget_diseqc_send_burst(struct dvb_frontend *fe,
				    enum fe_sec_mini_cmd minicmd)
{
	struct budget* budget = (struct budget*) fe->dvb->priv;

	SendDiSEqCMsg (budget, 0, NULL, minicmd);

	return 0;
}

static int budget_av7110_send_fw_cmd(struct budget_patch *budget, u16* buf, int length)
{
	int i;

	dprintk(2, "budget: %p\n", budget);

	for (i = 2; i < length; i++)
	{
		  ttpci_budget_debiwrite(budget, DEBINOSWAP, COMMAND + 2*i, 2, (u32) buf[i], 0,0);
		  msleep(5);
	}
	if (length)
		  ttpci_budget_debiwrite(budget, DEBINOSWAP, COMMAND + 2, 2, (u32) buf[1], 0,0);
	else
		  ttpci_budget_debiwrite(budget, DEBINOSWAP, COMMAND + 2, 2, 0, 0,0);
	msleep(5);
	ttpci_budget_debiwrite(budget, DEBINOSWAP, COMMAND, 2, (u32) buf[0], 0,0);
	msleep(5);
	return 0;
}

static void av7110_set22k(struct budget_patch *budget, int state)
{
	u16 buf[2] = {( COMTYPE_AUDIODAC << 8) | (state ? ON22K : OFF22K), 0};

	dprintk(2, "budget: %p\n", budget);
	budget_av7110_send_fw_cmd(budget, buf, 2);
}

static int av7110_send_diseqc_msg(struct budget_patch *budget, int len, u8 *msg, int burst)
{
	int i;
	u16 buf[18] = { ((COMTYPE_AUDIODAC << 8) | SendDiSEqC),
		16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

	dprintk(2, "budget: %p\n", budget);

	if (len>10)
		len=10;

	buf[1] = len+2;
	buf[2] = len;

	if (burst != -1)
		buf[3]=burst ? 0x01 : 0x00;
	else
		buf[3]=0xffff;

	for (i=0; i<len; i++)
		buf[i+4]=msg[i];

	budget_av7110_send_fw_cmd(budget, buf, 18);
	return 0;
}

static int budget_patch_set_tone(struct dvb_frontend *fe,
				 enum fe_sec_tone_mode tone)
{
	struct budget_patch* budget = (struct budget_patch*) fe->dvb->priv;

	switch (tone) {
	case SEC_TONE_ON:
		av7110_set22k (budget, 1);
		break;

	case SEC_TONE_OFF:
		av7110_set22k (budget, 0);
		break;

	default:
		return -EINVAL;
	}

	return 0;
}

static int budget_patch_diseqc_send_master_cmd(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd* cmd)
{
	struct budget_patch* budget = (struct budget_patch*) fe->dvb->priv;

	av7110_send_diseqc_msg (budget, cmd->msg_len, cmd->msg, 0);

	return 0;
}

static int budget_patch_diseqc_send_burst(struct dvb_frontend *fe,
					  enum fe_sec_mini_cmd minicmd)
{
	struct budget_patch* budget = (struct budget_patch*) fe->dvb->priv;

	av7110_send_diseqc_msg (budget, 0, NULL, minicmd);

	return 0;
}

static int alps_bsrv2_tuner_set_params(struct dvb_frontend *fe)
{
	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
	struct budget_patch* budget = (struct budget_patch*) fe->dvb->priv;
	u8 pwr = 0;
	u8 buf[4];
	struct i2c_msg msg = { .addr = 0x61, .flags = 0, .buf = buf, .len = sizeof(buf) };
	u32 div = (p->frequency + 479500) / 125;

	if (p->frequency > 2000000)
		pwr = 3;
	else if (p->frequency > 1800000)
		pwr = 2;
	else if (p->frequency > 1600000)
		pwr = 1;
	else if (p->frequency > 1200000)
		pwr = 0;
	else if (p->frequency >= 1100000)
		pwr = 1;
	else pwr = 2;

	buf[0] = (div >> 8) & 0x7f;
	buf[1] = div & 0xff;
	buf[2] = ((div & 0x18000) >> 10) | 0x95;
	buf[3] = (pwr << 6) | 0x30;

	// NOTE: since we're using a prescaler of 2, we set the
	// divisor frequency to 62.5kHz and divide by 125 above

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

static struct ves1x93_config alps_bsrv2_config = {
	.demod_address = 0x08,
	.xin = 90100000UL,
	.invert_pwm = 0,
};

static int grundig_29504_451_tuner_set_params(struct dvb_frontend *fe)
{
	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
	struct budget_patch* budget = (struct budget_patch*) fe->dvb->priv;
	u32 div;
	u8 data[4];
	struct i2c_msg msg = { .addr = 0x61, .flags = 0, .buf = data, .len = sizeof(data) };

	div = p->frequency / 125;
	data[0] = (div >> 8) & 0x7f;
	data[1] = div & 0xff;
	data[2] = 0x8e;
	data[3] = 0x00;

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

static struct tda8083_config grundig_29504_451_config = {
	.demod_address = 0x68,
};

static void frontend_init(struct budget_patch* budget)
{
	switch(budget->dev->pci->subsystem_device) {
	case 0x0000: // Hauppauge/TT WinTV DVB-S rev1.X
	case 0x1013: // SATELCO Multimedia PCI

		// try the ALPS BSRV2 first of all
		budget->dvb_frontend = dvb_attach(ves1x93_attach, &alps_bsrv2_config, &budget->i2c_adap);
		if (budget->dvb_frontend) {
			budget->dvb_frontend->ops.tuner_ops.set_params = alps_bsrv2_tuner_set_params;
			budget->dvb_frontend->ops.diseqc_send_master_cmd = budget_patch_diseqc_send_master_cmd;
			budget->dvb_frontend->ops.diseqc_send_burst = budget_patch_diseqc_send_burst;
			budget->dvb_frontend->ops.set_tone = budget_patch_set_tone;
			break;
		}

		// try the ALPS BSRU6 now
		budget->dvb_frontend = dvb_attach(stv0299_attach, &alps_bsru6_config, &budget->i2c_adap);
		if (budget->dvb_frontend) {
			budget->dvb_frontend->ops.tuner_ops.set_params = alps_bsru6_tuner_set_params;
			budget->dvb_frontend->tuner_priv = &budget->i2c_adap;

			budget->dvb_frontend->ops.diseqc_send_master_cmd = budget_diseqc_send_master_cmd;
			budget->dvb_frontend->ops.diseqc_send_burst = budget_diseqc_send_burst;
			budget->dvb_frontend->ops.set_tone = budget_set_tone;
			break;
		}

		// Try the grundig 29504-451
		budget->dvb_frontend = dvb_attach(tda8083_attach, &grundig_29504_451_config, &budget->i2c_adap);
		if (budget->dvb_frontend) {
			budget->dvb_frontend->ops.tuner_ops.set_params = grundig_29504_451_tuner_set_params;
			budget->dvb_frontend->ops.diseqc_send_master_cmd = budget_diseqc_send_master_cmd;
			budget->dvb_frontend->ops.diseqc_send_burst = budget_diseqc_send_burst;
			budget->dvb_frontend->ops.set_tone = budget_set_tone;
			break;
		}
		break;
	}

	if (budget->dvb_frontend == NULL) {
		printk("dvb-ttpci: A frontend driver was not found for device [%04x:%04x] subsystem [%04x:%04x]\n",
		       budget->dev->pci->vendor,
		       budget->dev->pci->device,
		       budget->dev->pci->subsystem_vendor,
		       budget->dev->pci->subsystem_device);
	} else {
		if (dvb_register_frontend(&budget->dvb_adapter, budget->dvb_frontend)) {
			printk("budget-av: Frontend registration failed!\n");
			dvb_frontend_detach(budget->dvb_frontend);
			budget->dvb_frontend = NULL;
		}
	}
}

/* written by Emard */
static int budget_patch_attach (struct saa7146_dev* dev, struct saa7146_pci_extension_data *info)
{
	struct budget_patch *budget;
	int err;
	int count = 0;
	int detected = 0;

#define PATCH_RESET 0
#define RPS_IRQ 0
#define HPS_SETUP 0
#if PATCH_RESET
	saa7146_write(dev, MC1, MASK_31);
	msleep(40);
#endif
#if HPS_SETUP
	// initialize registers. Better to have it like this
	// than leaving something unconfigured
	saa7146_write(dev, DD1_STREAM_B, 0);
	// port B VSYNC at rising edge
	saa7146_write(dev, DD1_INIT, 0x00000200);  // have this in budget-core too!
	saa7146_write(dev, BRS_CTRL, 0x00000000);  // VBI

	// debi config
	// saa7146_write(dev, DEBI_CONFIG, MASK_30|MASK_28|MASK_18);

	// zero all HPS registers
	saa7146_write(dev, HPS_H_PRESCALE, 0);                  // r68
	saa7146_write(dev, HPS_H_SCALE, 0);                     // r6c
	saa7146_write(dev, BCS_CTRL, 0);                        // r70
	saa7146_write(dev, HPS_V_SCALE, 0);                     // r60
	saa7146_write(dev, HPS_V_GAIN, 0);                      // r64
	saa7146_write(dev, CHROMA_KEY_RANGE, 0);                // r74
	saa7146_write(dev, CLIP_FORMAT_CTRL, 0);                // r78
	// Set HPS prescaler for port B input
	saa7146_write(dev, HPS_CTRL, (1<<30) | (0<<29) | (1<<28) | (0<<12) );
	saa7146_write(dev, MC2,
	  0 * (MASK_08 | MASK_24)  |   // BRS control
	  0 * (MASK_09 | MASK_25)  |   // a
	  0 * (MASK_10 | MASK_26)  |   // b
	  1 * (MASK_06 | MASK_22)  |   // HPS_CTRL1
	  1 * (MASK_05 | MASK_21)  |   // HPS_CTRL2
	  0 * (MASK_01 | MASK_15)      // DEBI
	   );
#endif
	// Disable RPS1 and RPS0
	saa7146_write(dev, MC1, ( MASK_29 | MASK_28));
	// RPS1 timeout disable
	saa7146_write(dev, RPS_TOV1, 0);

	// code for autodetection
	// will wait for VBI_B event (vertical blank at port B)
	// and will reset GPIO3 after VBI_B is detected.
	// (GPIO3 should be raised high by CPU to
	// test if GPIO3 will generate vertical blank signal
	// in budget patch GPIO3 is connected to VSYNC_B
	count = 0;
#if 0
	WRITE_RPS1(CMD_UPLOAD |
	  MASK_10 | MASK_09 | MASK_08 | MASK_06 | MASK_05 | MASK_04 | MASK_03 | MASK_02 );
#endif
	WRITE_RPS1(CMD_PAUSE | EVT_VBI_B);
	WRITE_RPS1(CMD_WR_REG_MASK | (GPIO_CTRL>>2));
	WRITE_RPS1(GPIO3_MSK);
	WRITE_RPS1(SAA7146_GPIO_OUTLO<<24);
#if RPS_IRQ
	// issue RPS1 interrupt to increment counter
	WRITE_RPS1(CMD_INTERRUPT);
	// at least a NOP is neede between two interrupts
	WRITE_RPS1(CMD_NOP);
	// interrupt again
	WRITE_RPS1(CMD_INTERRUPT);
#endif
	WRITE_RPS1(CMD_STOP);

#if RPS_IRQ
	// set event counter 1 source as RPS1 interrupt (0x03)          (rE4 p53)
	// use 0x03 to track RPS1 interrupts - increase by 1 every gpio3 is toggled
	// use 0x15 to track VPE  interrupts - increase by 1 every vpeirq() is called
	saa7146_write(dev, EC1SSR, (0x03<<2) | 3 );
	// set event counter 1 threshold to maximum allowed value        (rEC p55)
	saa7146_write(dev, ECT1R,  0x3fff );
#endif
	// Fix VSYNC level
	saa7146_setgpio(dev, 3, SAA7146_GPIO_OUTLO);
	// Set RPS1 Address register to point to RPS code               (r108 p42)
	saa7146_write(dev, RPS_ADDR1, dev->d_rps1.dma_handle);
	// Enable RPS1,                                                 (rFC p33)
	saa7146_write(dev, MC1, (MASK_13 | MASK_29 ));


	mdelay(50);
	saa7146_setgpio(dev, 3, SAA7146_GPIO_OUTHI);
	mdelay(150);


	if( (saa7146_read(dev, GPIO_CTRL) & 0x10000000) == 0)
		detected = 1;

#if RPS_IRQ
	printk("Event Counter 1 0x%04x\n", saa7146_read(dev, EC1R) & 0x3fff );
#endif
	// Disable RPS1
	saa7146_write(dev, MC1, ( MASK_29 ));

	if(detected == 0)
		printk("budget-patch not detected or saa7146 in non-default state.\n"
		       "try enabling resetting of 7146 with MASK_31 in MC1 register\n");

	else
		printk("BUDGET-PATCH DETECTED.\n");


/*      OLD (Original design by Roberto Deza):
**      This code will setup the SAA7146_RPS1 to generate a square
**      wave on GPIO3, changing when a field (TS_HEIGHT/2 "lines" of
**      TS_WIDTH packets) has been acquired on SAA7146_D1B video port;
**      then, this GPIO3 output which is connected to the D1B_VSYNC
**      input, will trigger the acquisition of the alternate field
**      and so on.
**      Currently, the TT_budget / WinTV_Nova cards have two ICs
**      (74HCT4040, LVC74) for the generation of this VSYNC signal,
**      which seems that can be done perfectly without this :-)).
*/

/*      New design (By Emard)
**      this rps1 code will copy internal HS event to GPIO3 pin.
**      GPIO3 is in budget-patch hardware connected to port B VSYNC

**      HS is an internal event of 7146, accessible with RPS
**      and temporarily raised high every n lines
**      (n in defined in the RPS_THRESH1 counter threshold)
**      I think HS is raised high on the beginning of the n-th line
**      and remains high until this n-th line that triggered
**      it is completely received. When the reception of n-th line
**      ends, HS is lowered.

**      To transmit data over DMA, 7146 needs changing state at
**      port B VSYNC pin. Any changing of port B VSYNC will
**      cause some DMA data transfer, with more or less packets loss.
**      It depends on the phase and frequency of VSYNC and
**      the way of 7146 is instructed to trigger on port B (defined
**      in DD1_INIT register, 3rd nibble from the right valid
**      numbers are 0-7, see datasheet)
**
**      The correct triggering can minimize packet loss,
**      dvbtraffic should give this stable bandwidths:
**        22k transponder = 33814 kbit/s
**      27.5k transponder = 38045 kbit/s
**      by experiment it is found that the best results
**      (stable bandwidths and almost no packet loss)
**      are obtained using DD1_INIT triggering number 2
**      (Va at rising edge of VS Fa = HS x VS-failing forced toggle)
**      and a VSYNC phase that occurs in the middle of DMA transfer
**      (about byte 188*512=96256 in the DMA window).
**
**      Phase of HS is still not clear to me how to control,
**      It just happens to be so. It can be seen if one enables
**      RPS_IRQ and print Event Counter 1 in vpeirq(). Every
**      time RPS_INTERRUPT is called, the Event Counter 1 will
**      increment. That's how the 7146 is programmed to do event
**      counting in this budget-patch.c
**      I *think* HPS setting has something to do with the phase
**      of HS but I can't be 100% sure in that.

**      hardware debug note: a working budget card (including budget patch)
**      with vpeirq() interrupt setup in mode "0x90" (every 64K) will
**      generate 3 interrupts per 25-Hz DMA frame of 2*188*512 bytes
**      and that means 3*25=75 Hz of interrupt frequency, as seen by
**      watch cat /proc/interrupts
**
**      If this frequency is 3x lower (and data received in the DMA
**      buffer don't start with 0x47, but in the middle of packets,
**      whose lengths appear to be like 188 292 188 104 etc.
**      this means VSYNC line is not connected in the hardware.
**      (check soldering pcb and pins)
**      The same behaviour of missing VSYNC can be duplicated on budget
**      cards, by setting DD1_INIT trigger mode 7 in 3rd nibble.
*/

	// Setup RPS1 "program" (p35)
	count = 0;


	// Wait Source Line Counter Threshold                           (p36)
	WRITE_RPS1(CMD_PAUSE | EVT_HS);
	// Set GPIO3=1                                                  (p42)
	WRITE_RPS1(CMD_WR_REG_MASK | (GPIO_CTRL>>2));
	WRITE_RPS1(GPIO3_MSK);
	WRITE_RPS1(SAA7146_GPIO_OUTHI<<24);
#if RPS_IRQ
	// issue RPS1 interrupt
	WRITE_RPS1(CMD_INTERRUPT);
#endif
	// Wait reset Source Line Counter Threshold                     (p36)
	WRITE_RPS1(CMD_PAUSE | RPS_INV | EVT_HS);
	// Set GPIO3=0                                                  (p42)
	WRITE_RPS1(CMD_WR_REG_MASK | (GPIO_CTRL>>2));
	WRITE_RPS1(GPIO3_MSK);
	WRITE_RPS1(SAA7146_GPIO_OUTLO<<24);
#if RPS_IRQ
	// issue RPS1 interrupt
	WRITE_RPS1(CMD_INTERRUPT);
#endif
	// Jump to begin of RPS program                                 (p37)
	WRITE_RPS1(CMD_JUMP);
	WRITE_RPS1(dev->d_rps1.dma_handle);

	// Fix VSYNC level
	saa7146_setgpio(dev, 3, SAA7146_GPIO_OUTLO);
	// Set RPS1 Address register to point to RPS code               (r108 p42)
	saa7146_write(dev, RPS_ADDR1, dev->d_rps1.dma_handle);

	if (!(budget = kmalloc (sizeof(struct budget_patch), GFP_KERNEL)))
		return -ENOMEM;

	dprintk(2, "budget: %p\n", budget);

	err = ttpci_budget_init(budget, dev, info, THIS_MODULE, adapter_nr);
	if (err) {
		kfree(budget);
		return err;
	}

	// Set Source Line Counter Threshold, using BRS                 (rCC p43)
	// It generates HS event every TS_HEIGHT lines
	// this is related to TS_WIDTH set in register
	// NUM_LINE_BYTE3 in budget-core.c. If NUM_LINE_BYTE
	// low 16 bits are set to TS_WIDTH bytes (TS_WIDTH=2*188
	//,then RPS_THRESH1
	// should be set to trigger every TS_HEIGHT (512) lines.
	//
	saa7146_write(dev, RPS_THRESH1, budget->buffer_height | MASK_12 );

	// saa7146_write(dev, RPS_THRESH0, ((TS_HEIGHT/2)<<16) |MASK_28| (TS_HEIGHT/2) |MASK_12 );
	// Enable RPS1                                                  (rFC p33)
	saa7146_write(dev, MC1, (MASK_13 | MASK_29));


	dev->ext_priv = budget;

	budget->dvb_adapter.priv = budget;
	frontend_init(budget);

	ttpci_budget_init_hooks(budget);

	return 0;
}

static int budget_patch_detach (struct saa7146_dev* dev)
{
	struct budget_patch *budget = (struct budget_patch*) dev->ext_priv;
	int err;

	if (budget->dvb_frontend) {
		dvb_unregister_frontend(budget->dvb_frontend);
		dvb_frontend_detach(budget->dvb_frontend);
	}
	err = ttpci_budget_deinit (budget);

	kfree (budget);

	return err;
}

static int __init budget_patch_init(void)
{
	return saa7146_register_extension(&budget_extension);
}

static void __exit budget_patch_exit(void)
{
	saa7146_unregister_extension(&budget_extension);
}

static struct saa7146_extension budget_extension = {
	.name           = "budget_patch dvb",
	.flags          = 0,

	.module         = THIS_MODULE,
	.pci_tbl        = pci_tbl,
	.attach         = budget_patch_attach,
	.detach         = budget_patch_detach,

	.irq_mask       = MASK_10,
	.irq_func       = ttpci_budget_irq10_handler,
};

module_init(budget_patch_init);
module_exit(budget_patch_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Emard, Roberto Deza, Holger Waechtler, Michael Hunold, others");
MODULE_DESCRIPTION("Driver for full TS modified DVB-S SAA7146+AV7110 "
		   "based so-called Budget Patch cards");