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1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * budget-patch.c: driver for Budget Patch,
4  * hardware modification of DVB-S cards enabling full TS
5  *
6  * Written by Emard <emard@softhome.net>
7  *
8  * Original idea by Roberto Deza <rdeza@unav.es>
9  *
10  * Special thanks to Holger Waechtler, Michael Hunold, Marian Durkovic
11  * and Metzlerbros
12  *
13  * the project's page is at https://linuxtv.org
14  */
15 
16 #include "av7110.h"
17 #include "av7110_hw.h"
18 #include "budget.h"
19 #include "stv0299.h"
20 #include "ves1x93.h"
21 #include "tda8083.h"
22 
23 #include "bsru6.h"
24 
25 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
26 
27 #define budget_patch budget
28 
29 static struct saa7146_extension budget_extension;
30 
31 MAKE_BUDGET_INFO(ttbp, "TT-Budget/Patch DVB-S 1.x PCI", BUDGET_PATCH);
32 //MAKE_BUDGET_INFO(satel,"TT-Budget/Patch SATELCO PCI", BUDGET_TT_HW_DISEQC);
33 
34 static const struct pci_device_id pci_tbl[] = {
35 	MAKE_EXTENSION_PCI(ttbp,0x13c2, 0x0000),
36 //        MAKE_EXTENSION_PCI(satel, 0x13c2, 0x1013),
37 	{
38 		.vendor    = 0,
39 	}
40 };
41 
42 /* those lines are for budget-patch to be tried
43 ** on a true budget card and observe the
44 ** behaviour of VSYNC generated by rps1.
45 ** this code was shamelessly copy/pasted from budget.c
46 */
gpio_Set22K(struct budget * budget,int state)47 static void gpio_Set22K (struct budget *budget, int state)
48 {
49 	struct saa7146_dev *dev=budget->dev;
50 	dprintk(2, "budget: %p\n", budget);
51 	saa7146_setgpio(dev, 3, (state ? SAA7146_GPIO_OUTHI : SAA7146_GPIO_OUTLO));
52 }
53 
54 /* Diseqc functions only for TT Budget card */
55 /* taken from the Skyvision DVB driver by
56    Ralph Metzler <rjkm@metzlerbros.de> */
57 
DiseqcSendBit(struct budget * budget,int data)58 static void DiseqcSendBit (struct budget *budget, int data)
59 {
60 	struct saa7146_dev *dev=budget->dev;
61 	dprintk(2, "budget: %p\n", budget);
62 
63 	saa7146_setgpio(dev, 3, SAA7146_GPIO_OUTHI);
64 	udelay(data ? 500 : 1000);
65 	saa7146_setgpio(dev, 3, SAA7146_GPIO_OUTLO);
66 	udelay(data ? 1000 : 500);
67 }
68 
DiseqcSendByte(struct budget * budget,int data)69 static void DiseqcSendByte (struct budget *budget, int data)
70 {
71 	int i, par=1, d;
72 
73 	dprintk(2, "budget: %p\n", budget);
74 
75 	for (i=7; i>=0; i--) {
76 		d = (data>>i)&1;
77 		par ^= d;
78 		DiseqcSendBit(budget, d);
79 	}
80 
81 	DiseqcSendBit(budget, par);
82 }
83 
SendDiSEqCMsg(struct budget * budget,int len,u8 * msg,unsigned long burst)84 static int SendDiSEqCMsg (struct budget *budget, int len, u8 *msg, unsigned long burst)
85 {
86 	struct saa7146_dev *dev=budget->dev;
87 	int i;
88 
89 	dprintk(2, "budget: %p\n", budget);
90 
91 	saa7146_setgpio(dev, 3, SAA7146_GPIO_OUTLO);
92 	mdelay(16);
93 
94 	for (i=0; i<len; i++)
95 		DiseqcSendByte(budget, msg[i]);
96 
97 	mdelay(16);
98 
99 	if (burst!=-1) {
100 		if (burst)
101 			DiseqcSendByte(budget, 0xff);
102 		else {
103 			saa7146_setgpio(dev, 3, SAA7146_GPIO_OUTHI);
104 			mdelay(12);
105 			udelay(500);
106 			saa7146_setgpio(dev, 3, SAA7146_GPIO_OUTLO);
107 		}
108 		msleep(20);
109 	}
110 
111 	return 0;
112 }
113 
114 /* shamelessly copy/pasted from budget.c */
budget_set_tone(struct dvb_frontend * fe,enum fe_sec_tone_mode tone)115 static int budget_set_tone(struct dvb_frontend *fe,
116 			   enum fe_sec_tone_mode tone)
117 {
118 	struct budget* budget = (struct budget*) fe->dvb->priv;
119 
120 	switch (tone) {
121 	case SEC_TONE_ON:
122 		gpio_Set22K (budget, 1);
123 		break;
124 
125 	case SEC_TONE_OFF:
126 		gpio_Set22K (budget, 0);
127 		break;
128 
129 	default:
130 		return -EINVAL;
131 	}
132 
133 	return 0;
134 }
135 
budget_diseqc_send_master_cmd(struct dvb_frontend * fe,struct dvb_diseqc_master_cmd * cmd)136 static int budget_diseqc_send_master_cmd(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd* cmd)
137 {
138 	struct budget* budget = (struct budget*) fe->dvb->priv;
139 
140 	SendDiSEqCMsg (budget, cmd->msg_len, cmd->msg, 0);
141 
142 	return 0;
143 }
144 
budget_diseqc_send_burst(struct dvb_frontend * fe,enum fe_sec_mini_cmd minicmd)145 static int budget_diseqc_send_burst(struct dvb_frontend *fe,
146 				    enum fe_sec_mini_cmd minicmd)
147 {
148 	struct budget* budget = (struct budget*) fe->dvb->priv;
149 
150 	SendDiSEqCMsg (budget, 0, NULL, minicmd);
151 
152 	return 0;
153 }
154 
budget_av7110_send_fw_cmd(struct budget_patch * budget,u16 * buf,int length)155 static int budget_av7110_send_fw_cmd(struct budget_patch *budget, u16* buf, int length)
156 {
157 	int i;
158 
159 	dprintk(2, "budget: %p\n", budget);
160 
161 	for (i = 2; i < length; i++)
162 	{
163 		  ttpci_budget_debiwrite(budget, DEBINOSWAP, COMMAND + 2*i, 2, (u32) buf[i], 0,0);
164 		  msleep(5);
165 	}
166 	if (length)
167 		  ttpci_budget_debiwrite(budget, DEBINOSWAP, COMMAND + 2, 2, (u32) buf[1], 0,0);
168 	else
169 		  ttpci_budget_debiwrite(budget, DEBINOSWAP, COMMAND + 2, 2, 0, 0,0);
170 	msleep(5);
171 	ttpci_budget_debiwrite(budget, DEBINOSWAP, COMMAND, 2, (u32) buf[0], 0,0);
172 	msleep(5);
173 	return 0;
174 }
175 
av7110_set22k(struct budget_patch * budget,int state)176 static void av7110_set22k(struct budget_patch *budget, int state)
177 {
178 	u16 buf[2] = {( COMTYPE_AUDIODAC << 8) | (state ? ON22K : OFF22K), 0};
179 
180 	dprintk(2, "budget: %p\n", budget);
181 	budget_av7110_send_fw_cmd(budget, buf, 2);
182 }
183 
av7110_send_diseqc_msg(struct budget_patch * budget,int len,u8 * msg,int burst)184 static int av7110_send_diseqc_msg(struct budget_patch *budget, int len, u8 *msg, int burst)
185 {
186 	int i;
187 	u16 buf[18] = { ((COMTYPE_AUDIODAC << 8) | SendDiSEqC),
188 		16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
189 
190 	dprintk(2, "budget: %p\n", budget);
191 
192 	if (len>10)
193 		len=10;
194 
195 	buf[1] = len+2;
196 	buf[2] = len;
197 
198 	if (burst != -1)
199 		buf[3]=burst ? 0x01 : 0x00;
200 	else
201 		buf[3]=0xffff;
202 
203 	for (i=0; i<len; i++)
204 		buf[i+4]=msg[i];
205 
206 	budget_av7110_send_fw_cmd(budget, buf, 18);
207 	return 0;
208 }
209 
budget_patch_set_tone(struct dvb_frontend * fe,enum fe_sec_tone_mode tone)210 static int budget_patch_set_tone(struct dvb_frontend *fe,
211 				 enum fe_sec_tone_mode tone)
212 {
213 	struct budget_patch* budget = (struct budget_patch*) fe->dvb->priv;
214 
215 	switch (tone) {
216 	case SEC_TONE_ON:
217 		av7110_set22k (budget, 1);
218 		break;
219 
220 	case SEC_TONE_OFF:
221 		av7110_set22k (budget, 0);
222 		break;
223 
224 	default:
225 		return -EINVAL;
226 	}
227 
228 	return 0;
229 }
230 
budget_patch_diseqc_send_master_cmd(struct dvb_frontend * fe,struct dvb_diseqc_master_cmd * cmd)231 static int budget_patch_diseqc_send_master_cmd(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd* cmd)
232 {
233 	struct budget_patch* budget = (struct budget_patch*) fe->dvb->priv;
234 
235 	av7110_send_diseqc_msg (budget, cmd->msg_len, cmd->msg, 0);
236 
237 	return 0;
238 }
239 
budget_patch_diseqc_send_burst(struct dvb_frontend * fe,enum fe_sec_mini_cmd minicmd)240 static int budget_patch_diseqc_send_burst(struct dvb_frontend *fe,
241 					  enum fe_sec_mini_cmd minicmd)
242 {
243 	struct budget_patch* budget = (struct budget_patch*) fe->dvb->priv;
244 
245 	av7110_send_diseqc_msg (budget, 0, NULL, minicmd);
246 
247 	return 0;
248 }
249 
alps_bsrv2_tuner_set_params(struct dvb_frontend * fe)250 static int alps_bsrv2_tuner_set_params(struct dvb_frontend *fe)
251 {
252 	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
253 	struct budget_patch* budget = (struct budget_patch*) fe->dvb->priv;
254 	u8 pwr = 0;
255 	u8 buf[4];
256 	struct i2c_msg msg = { .addr = 0x61, .flags = 0, .buf = buf, .len = sizeof(buf) };
257 	u32 div = (p->frequency + 479500) / 125;
258 
259 	if (p->frequency > 2000000)
260 		pwr = 3;
261 	else if (p->frequency > 1800000)
262 		pwr = 2;
263 	else if (p->frequency > 1600000)
264 		pwr = 1;
265 	else if (p->frequency > 1200000)
266 		pwr = 0;
267 	else if (p->frequency >= 1100000)
268 		pwr = 1;
269 	else pwr = 2;
270 
271 	buf[0] = (div >> 8) & 0x7f;
272 	buf[1] = div & 0xff;
273 	buf[2] = ((div & 0x18000) >> 10) | 0x95;
274 	buf[3] = (pwr << 6) | 0x30;
275 
276 	// NOTE: since we're using a prescaler of 2, we set the
277 	// divisor frequency to 62.5kHz and divide by 125 above
278 
279 	if (fe->ops.i2c_gate_ctrl)
280 		fe->ops.i2c_gate_ctrl(fe, 1);
281 	if (i2c_transfer (&budget->i2c_adap, &msg, 1) != 1)
282 		return -EIO;
283 	return 0;
284 }
285 
286 static struct ves1x93_config alps_bsrv2_config = {
287 	.demod_address = 0x08,
288 	.xin = 90100000UL,
289 	.invert_pwm = 0,
290 };
291 
grundig_29504_451_tuner_set_params(struct dvb_frontend * fe)292 static int grundig_29504_451_tuner_set_params(struct dvb_frontend *fe)
293 {
294 	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
295 	struct budget_patch* budget = (struct budget_patch*) fe->dvb->priv;
296 	u32 div;
297 	u8 data[4];
298 	struct i2c_msg msg = { .addr = 0x61, .flags = 0, .buf = data, .len = sizeof(data) };
299 
300 	div = p->frequency / 125;
301 	data[0] = (div >> 8) & 0x7f;
302 	data[1] = div & 0xff;
303 	data[2] = 0x8e;
304 	data[3] = 0x00;
305 
306 	if (fe->ops.i2c_gate_ctrl)
307 		fe->ops.i2c_gate_ctrl(fe, 1);
308 	if (i2c_transfer (&budget->i2c_adap, &msg, 1) != 1)
309 		return -EIO;
310 	return 0;
311 }
312 
313 static struct tda8083_config grundig_29504_451_config = {
314 	.demod_address = 0x68,
315 };
316 
frontend_init(struct budget_patch * budget)317 static void frontend_init(struct budget_patch* budget)
318 {
319 	switch(budget->dev->pci->subsystem_device) {
320 	case 0x0000: // Hauppauge/TT WinTV DVB-S rev1.X
321 	case 0x1013: // SATELCO Multimedia PCI
322 
323 		// try the ALPS BSRV2 first of all
324 		budget->dvb_frontend = dvb_attach(ves1x93_attach, &alps_bsrv2_config, &budget->i2c_adap);
325 		if (budget->dvb_frontend) {
326 			budget->dvb_frontend->ops.tuner_ops.set_params = alps_bsrv2_tuner_set_params;
327 			budget->dvb_frontend->ops.diseqc_send_master_cmd = budget_patch_diseqc_send_master_cmd;
328 			budget->dvb_frontend->ops.diseqc_send_burst = budget_patch_diseqc_send_burst;
329 			budget->dvb_frontend->ops.set_tone = budget_patch_set_tone;
330 			break;
331 		}
332 
333 		// try the ALPS BSRU6 now
334 		budget->dvb_frontend = dvb_attach(stv0299_attach, &alps_bsru6_config, &budget->i2c_adap);
335 		if (budget->dvb_frontend) {
336 			budget->dvb_frontend->ops.tuner_ops.set_params = alps_bsru6_tuner_set_params;
337 			budget->dvb_frontend->tuner_priv = &budget->i2c_adap;
338 
339 			budget->dvb_frontend->ops.diseqc_send_master_cmd = budget_diseqc_send_master_cmd;
340 			budget->dvb_frontend->ops.diseqc_send_burst = budget_diseqc_send_burst;
341 			budget->dvb_frontend->ops.set_tone = budget_set_tone;
342 			break;
343 		}
344 
345 		// Try the grundig 29504-451
346 		budget->dvb_frontend = dvb_attach(tda8083_attach, &grundig_29504_451_config, &budget->i2c_adap);
347 		if (budget->dvb_frontend) {
348 			budget->dvb_frontend->ops.tuner_ops.set_params = grundig_29504_451_tuner_set_params;
349 			budget->dvb_frontend->ops.diseqc_send_master_cmd = budget_diseqc_send_master_cmd;
350 			budget->dvb_frontend->ops.diseqc_send_burst = budget_diseqc_send_burst;
351 			budget->dvb_frontend->ops.set_tone = budget_set_tone;
352 			break;
353 		}
354 		break;
355 	}
356 
357 	if (budget->dvb_frontend == NULL) {
358 		printk("dvb-ttpci: A frontend driver was not found for device [%04x:%04x] subsystem [%04x:%04x]\n",
359 		       budget->dev->pci->vendor,
360 		       budget->dev->pci->device,
361 		       budget->dev->pci->subsystem_vendor,
362 		       budget->dev->pci->subsystem_device);
363 	} else {
364 		if (dvb_register_frontend(&budget->dvb_adapter, budget->dvb_frontend)) {
365 			printk("budget-av: Frontend registration failed!\n");
366 			dvb_frontend_detach(budget->dvb_frontend);
367 			budget->dvb_frontend = NULL;
368 		}
369 	}
370 }
371 
372 /* written by Emard */
budget_patch_attach(struct saa7146_dev * dev,struct saa7146_pci_extension_data * info)373 static int budget_patch_attach (struct saa7146_dev* dev, struct saa7146_pci_extension_data *info)
374 {
375 	struct budget_patch *budget;
376 	int err;
377 	int count = 0;
378 	int detected = 0;
379 
380 #define PATCH_RESET 0
381 #define RPS_IRQ 0
382 #define HPS_SETUP 0
383 #if PATCH_RESET
384 	saa7146_write(dev, MC1, MASK_31);
385 	msleep(40);
386 #endif
387 #if HPS_SETUP
388 	// initialize registers. Better to have it like this
389 	// than leaving something unconfigured
390 	saa7146_write(dev, DD1_STREAM_B, 0);
391 	// port B VSYNC at rising edge
392 	saa7146_write(dev, DD1_INIT, 0x00000200);  // have this in budget-core too!
393 	saa7146_write(dev, BRS_CTRL, 0x00000000);  // VBI
394 
395 	// debi config
396 	// saa7146_write(dev, DEBI_CONFIG, MASK_30|MASK_28|MASK_18);
397 
398 	// zero all HPS registers
399 	saa7146_write(dev, HPS_H_PRESCALE, 0);                  // r68
400 	saa7146_write(dev, HPS_H_SCALE, 0);                     // r6c
401 	saa7146_write(dev, BCS_CTRL, 0);                        // r70
402 	saa7146_write(dev, HPS_V_SCALE, 0);                     // r60
403 	saa7146_write(dev, HPS_V_GAIN, 0);                      // r64
404 	saa7146_write(dev, CHROMA_KEY_RANGE, 0);                // r74
405 	saa7146_write(dev, CLIP_FORMAT_CTRL, 0);                // r78
406 	// Set HPS prescaler for port B input
407 	saa7146_write(dev, HPS_CTRL, (1<<30) | (0<<29) | (1<<28) | (0<<12) );
408 	saa7146_write(dev, MC2,
409 	  0 * (MASK_08 | MASK_24)  |   // BRS control
410 	  0 * (MASK_09 | MASK_25)  |   // a
411 	  0 * (MASK_10 | MASK_26)  |   // b
412 	  1 * (MASK_06 | MASK_22)  |   // HPS_CTRL1
413 	  1 * (MASK_05 | MASK_21)  |   // HPS_CTRL2
414 	  0 * (MASK_01 | MASK_15)      // DEBI
415 	   );
416 #endif
417 	// Disable RPS1 and RPS0
418 	saa7146_write(dev, MC1, ( MASK_29 | MASK_28));
419 	// RPS1 timeout disable
420 	saa7146_write(dev, RPS_TOV1, 0);
421 
422 	// code for autodetection
423 	// will wait for VBI_B event (vertical blank at port B)
424 	// and will reset GPIO3 after VBI_B is detected.
425 	// (GPIO3 should be raised high by CPU to
426 	// test if GPIO3 will generate vertical blank signal
427 	// in budget patch GPIO3 is connected to VSYNC_B
428 	count = 0;
429 #if 0
430 	WRITE_RPS1(CMD_UPLOAD |
431 	  MASK_10 | MASK_09 | MASK_08 | MASK_06 | MASK_05 | MASK_04 | MASK_03 | MASK_02 );
432 #endif
433 	WRITE_RPS1(CMD_PAUSE | EVT_VBI_B);
434 	WRITE_RPS1(CMD_WR_REG_MASK | (GPIO_CTRL>>2));
435 	WRITE_RPS1(GPIO3_MSK);
436 	WRITE_RPS1(SAA7146_GPIO_OUTLO<<24);
437 #if RPS_IRQ
438 	// issue RPS1 interrupt to increment counter
439 	WRITE_RPS1(CMD_INTERRUPT);
440 	// at least a NOP is neede between two interrupts
441 	WRITE_RPS1(CMD_NOP);
442 	// interrupt again
443 	WRITE_RPS1(CMD_INTERRUPT);
444 #endif
445 	WRITE_RPS1(CMD_STOP);
446 
447 #if RPS_IRQ
448 	// set event counter 1 source as RPS1 interrupt (0x03)          (rE4 p53)
449 	// use 0x03 to track RPS1 interrupts - increase by 1 every gpio3 is toggled
450 	// use 0x15 to track VPE  interrupts - increase by 1 every vpeirq() is called
451 	saa7146_write(dev, EC1SSR, (0x03<<2) | 3 );
452 	// set event counter 1 threshold to maximum allowed value        (rEC p55)
453 	saa7146_write(dev, ECT1R,  0x3fff );
454 #endif
455 	// Fix VSYNC level
456 	saa7146_setgpio(dev, 3, SAA7146_GPIO_OUTLO);
457 	// Set RPS1 Address register to point to RPS code               (r108 p42)
458 	saa7146_write(dev, RPS_ADDR1, dev->d_rps1.dma_handle);
459 	// Enable RPS1,                                                 (rFC p33)
460 	saa7146_write(dev, MC1, (MASK_13 | MASK_29 ));
461 
462 
463 	mdelay(50);
464 	saa7146_setgpio(dev, 3, SAA7146_GPIO_OUTHI);
465 	mdelay(150);
466 
467 
468 	if( (saa7146_read(dev, GPIO_CTRL) & 0x10000000) == 0)
469 		detected = 1;
470 
471 #if RPS_IRQ
472 	printk("Event Counter 1 0x%04x\n", saa7146_read(dev, EC1R) & 0x3fff );
473 #endif
474 	// Disable RPS1
475 	saa7146_write(dev, MC1, ( MASK_29 ));
476 
477 	if(detected == 0)
478 		printk("budget-patch not detected or saa7146 in non-default state.\n"
479 		       "try enabling resetting of 7146 with MASK_31 in MC1 register\n");
480 
481 	else
482 		printk("BUDGET-PATCH DETECTED.\n");
483 
484 
485 /*      OLD (Original design by Roberto Deza):
486 **      This code will setup the SAA7146_RPS1 to generate a square
487 **      wave on GPIO3, changing when a field (TS_HEIGHT/2 "lines" of
488 **      TS_WIDTH packets) has been acquired on SAA7146_D1B video port;
489 **      then, this GPIO3 output which is connected to the D1B_VSYNC
490 **      input, will trigger the acquisition of the alternate field
491 **      and so on.
492 **      Currently, the TT_budget / WinTV_Nova cards have two ICs
493 **      (74HCT4040, LVC74) for the generation of this VSYNC signal,
494 **      which seems that can be done perfectly without this :-)).
495 */
496 
497 /*      New design (By Emard)
498 **      this rps1 code will copy internal HS event to GPIO3 pin.
499 **      GPIO3 is in budget-patch hardware connected to port B VSYNC
500 
501 **      HS is an internal event of 7146, accessible with RPS
502 **      and temporarily raised high every n lines
503 **      (n in defined in the RPS_THRESH1 counter threshold)
504 **      I think HS is raised high on the beginning of the n-th line
505 **      and remains high until this n-th line that triggered
506 **      it is completely received. When the reception of n-th line
507 **      ends, HS is lowered.
508 
509 **      To transmit data over DMA, 7146 needs changing state at
510 **      port B VSYNC pin. Any changing of port B VSYNC will
511 **      cause some DMA data transfer, with more or less packets loss.
512 **      It depends on the phase and frequency of VSYNC and
513 **      the way of 7146 is instructed to trigger on port B (defined
514 **      in DD1_INIT register, 3rd nibble from the right valid
515 **      numbers are 0-7, see datasheet)
516 **
517 **      The correct triggering can minimize packet loss,
518 **      dvbtraffic should give this stable bandwidths:
519 **        22k transponder = 33814 kbit/s
520 **      27.5k transponder = 38045 kbit/s
521 **      by experiment it is found that the best results
522 **      (stable bandwidths and almost no packet loss)
523 **      are obtained using DD1_INIT triggering number 2
524 **      (Va at rising edge of VS Fa = HS x VS-failing forced toggle)
525 **      and a VSYNC phase that occurs in the middle of DMA transfer
526 **      (about byte 188*512=96256 in the DMA window).
527 **
528 **      Phase of HS is still not clear to me how to control,
529 **      It just happens to be so. It can be seen if one enables
530 **      RPS_IRQ and print Event Counter 1 in vpeirq(). Every
531 **      time RPS_INTERRUPT is called, the Event Counter 1 will
532 **      increment. That's how the 7146 is programmed to do event
533 **      counting in this budget-patch.c
534 **      I *think* HPS setting has something to do with the phase
535 **      of HS but I can't be 100% sure in that.
536 
537 **      hardware debug note: a working budget card (including budget patch)
538 **      with vpeirq() interrupt setup in mode "0x90" (every 64K) will
539 **      generate 3 interrupts per 25-Hz DMA frame of 2*188*512 bytes
540 **      and that means 3*25=75 Hz of interrupt frequency, as seen by
541 **      watch cat /proc/interrupts
542 **
543 **      If this frequency is 3x lower (and data received in the DMA
544 **      buffer don't start with 0x47, but in the middle of packets,
545 **      whose lengths appear to be like 188 292 188 104 etc.
546 **      this means VSYNC line is not connected in the hardware.
547 **      (check soldering pcb and pins)
548 **      The same behaviour of missing VSYNC can be duplicated on budget
549 **      cards, by setting DD1_INIT trigger mode 7 in 3rd nibble.
550 */
551 
552 	// Setup RPS1 "program" (p35)
553 	count = 0;
554 
555 
556 	// Wait Source Line Counter Threshold                           (p36)
557 	WRITE_RPS1(CMD_PAUSE | EVT_HS);
558 	// Set GPIO3=1                                                  (p42)
559 	WRITE_RPS1(CMD_WR_REG_MASK | (GPIO_CTRL>>2));
560 	WRITE_RPS1(GPIO3_MSK);
561 	WRITE_RPS1(SAA7146_GPIO_OUTHI<<24);
562 #if RPS_IRQ
563 	// issue RPS1 interrupt
564 	WRITE_RPS1(CMD_INTERRUPT);
565 #endif
566 	// Wait reset Source Line Counter Threshold                     (p36)
567 	WRITE_RPS1(CMD_PAUSE | RPS_INV | EVT_HS);
568 	// Set GPIO3=0                                                  (p42)
569 	WRITE_RPS1(CMD_WR_REG_MASK | (GPIO_CTRL>>2));
570 	WRITE_RPS1(GPIO3_MSK);
571 	WRITE_RPS1(SAA7146_GPIO_OUTLO<<24);
572 #if RPS_IRQ
573 	// issue RPS1 interrupt
574 	WRITE_RPS1(CMD_INTERRUPT);
575 #endif
576 	// Jump to begin of RPS program                                 (p37)
577 	WRITE_RPS1(CMD_JUMP);
578 	WRITE_RPS1(dev->d_rps1.dma_handle);
579 
580 	// Fix VSYNC level
581 	saa7146_setgpio(dev, 3, SAA7146_GPIO_OUTLO);
582 	// Set RPS1 Address register to point to RPS code               (r108 p42)
583 	saa7146_write(dev, RPS_ADDR1, dev->d_rps1.dma_handle);
584 
585 	if (!(budget = kmalloc (sizeof(struct budget_patch), GFP_KERNEL)))
586 		return -ENOMEM;
587 
588 	dprintk(2, "budget: %p\n", budget);
589 
590 	err = ttpci_budget_init(budget, dev, info, THIS_MODULE, adapter_nr);
591 	if (err) {
592 		kfree(budget);
593 		return err;
594 	}
595 
596 	// Set Source Line Counter Threshold, using BRS                 (rCC p43)
597 	// It generates HS event every TS_HEIGHT lines
598 	// this is related to TS_WIDTH set in register
599 	// NUM_LINE_BYTE3 in budget-core.c. If NUM_LINE_BYTE
600 	// low 16 bits are set to TS_WIDTH bytes (TS_WIDTH=2*188
601 	//,then RPS_THRESH1
602 	// should be set to trigger every TS_HEIGHT (512) lines.
603 	//
604 	saa7146_write(dev, RPS_THRESH1, budget->buffer_height | MASK_12 );
605 
606 	// saa7146_write(dev, RPS_THRESH0, ((TS_HEIGHT/2)<<16) |MASK_28| (TS_HEIGHT/2) |MASK_12 );
607 	// Enable RPS1                                                  (rFC p33)
608 	saa7146_write(dev, MC1, (MASK_13 | MASK_29));
609 
610 
611 	dev->ext_priv = budget;
612 
613 	budget->dvb_adapter.priv = budget;
614 	frontend_init(budget);
615 
616 	ttpci_budget_init_hooks(budget);
617 
618 	return 0;
619 }
620 
budget_patch_detach(struct saa7146_dev * dev)621 static int budget_patch_detach (struct saa7146_dev* dev)
622 {
623 	struct budget_patch *budget = (struct budget_patch*) dev->ext_priv;
624 	int err;
625 
626 	if (budget->dvb_frontend) {
627 		dvb_unregister_frontend(budget->dvb_frontend);
628 		dvb_frontend_detach(budget->dvb_frontend);
629 	}
630 	err = ttpci_budget_deinit (budget);
631 
632 	kfree (budget);
633 
634 	return err;
635 }
636 
budget_patch_init(void)637 static int __init budget_patch_init(void)
638 {
639 	return saa7146_register_extension(&budget_extension);
640 }
641 
budget_patch_exit(void)642 static void __exit budget_patch_exit(void)
643 {
644 	saa7146_unregister_extension(&budget_extension);
645 }
646 
647 static struct saa7146_extension budget_extension = {
648 	.name           = "budget_patch dvb",
649 	.flags          = 0,
650 
651 	.module         = THIS_MODULE,
652 	.pci_tbl        = pci_tbl,
653 	.attach         = budget_patch_attach,
654 	.detach         = budget_patch_detach,
655 
656 	.irq_mask       = MASK_10,
657 	.irq_func       = ttpci_budget_irq10_handler,
658 };
659 
660 module_init(budget_patch_init);
661 module_exit(budget_patch_exit);
662 
663 MODULE_LICENSE("GPL");
664 MODULE_AUTHOR("Emard, Roberto Deza, Holger Waechtler, Michael Hunold, others");
665 MODULE_DESCRIPTION("Driver for full TS modified DVB-S SAA7146+AV7110 based so-called Budget Patch cards");
666