}		// try the ALPS BSRU6 now		budget->dvb_frontend = stv0299_attach(&alps_bsru6_config, &budget->i2c_adap);		if (budget->dvb_frontend) {			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 = tda8083_attach(&grundig_29504_451_config, &budget->i2c_adap);		if (budget->dvb_frontend) {			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");			if (budget->dvb_frontend->ops->release)				budget->dvb_frontend->ops->release(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 /* keep */	WRITE_RPS1(cpu_to_le32(CMD_UPLOAD |	  MASK_10 | MASK_09 | MASK_08 | MASK_06 | MASK_05 | MASK_04 | MASK_03 | MASK_02 ));#endif	WRITE_RPS1(cpu_to_le32(CMD_PAUSE | EVT_VBI_B));	WRITE_RPS1(cpu_to_le32(CMD_WR_REG_MASK | (GPIO_CTRL>>2)));	WRITE_RPS1(cpu_to_le32(GPIO3_MSK));	WRITE_RPS1(cpu_to_le32(SAA7146_GPIO_OUTLO<<24));#if RPS_IRQ	// issue RPS1 interrupt to increment counter	WRITE_RPS1(cpu_to_le32(CMD_INTERRUPT));	// at least a NOP is neede between two interrupts	WRITE_RPS1(cpu_to_le32(CMD_NOP));	// interrupt again	WRITE_RPS1(cpu_to_le32(CMD_INTERRUPT));#endif	WRITE_RPS1(cpu_to_le32(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 treshold 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 ressetting 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 connectd 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 receiption 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 cant 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 freqency, 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 seting DD1_INIT trigger mode 7 in 3rd nibble.*/	// Setup RPS1 "program" (p35)	count = 0;	// Wait Source Line Counter Threshold                           (p36)	WRITE_RPS1(cpu_to_le32(CMD_PAUSE | EVT_HS));	// Set GPIO3=1                                                  (p42)	WRITE_RPS1(cpu_to_le32(CMD_WR_REG_MASK | (GPIO_CTRL>>2)));	WRITE_RPS1(cpu_to_le32(GPIO3_MSK));	WRITE_RPS1(cpu_to_le32(SAA7146_GPIO_OUTHI<<24));#if RPS_IRQ	// issue RPS1 interrupt	WRITE_RPS1(cpu_to_le32(CMD_INTERRUPT));#endif	// Wait reset Source Line Counter Threshold                     (p36)	WRITE_RPS1(cpu_to_le32(CMD_PAUSE | RPS_INV | EVT_HS));	// Set GPIO3=0                                                  (p42)	WRITE_RPS1(cpu_to_le32(CMD_WR_REG_MASK | (GPIO_CTRL>>2)));	WRITE_RPS1(cpu_to_le32(GPIO3_MSK));	WRITE_RPS1(cpu_to_le32(SAA7146_GPIO_OUTLO<<24));#if RPS_IRQ	// issue RPS1 interrupt	WRITE_RPS1(cpu_to_le32(CMD_INTERRUPT));#endif	// Jump to begin of RPS program                                 (p37)	WRITE_RPS1(cpu_to_le32(CMD_JUMP));	WRITE_RPS1(cpu_to_le32(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);	if ((err = ttpci_budget_init (budget, dev, info, THIS_MODULE))) {		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);	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);	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\0",	.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");