root/drivers/media/pci/ttpci/budget-patch.c

DEFINITIONS

1. gpio_Set22K
2. DiseqcSendBit
3. DiseqcSendByte
4. SendDiSEqCMsg
5. budget_set_tone
6. budget_diseqc_send_master_cmd
7. budget_diseqc_send_burst
8. budget_av7110_send_fw_cmd
9. av7110_set22k
10. av7110_send_diseqc_msg
11. budget_patch_set_tone
12. budget_patch_diseqc_send_master_cmd
13. budget_patch_diseqc_send_burst
14. alps_bsrv2_tuner_set_params
15. grundig_29504_451_tuner_set_params
16. frontend_init
17. budget_patch_attach
18. budget_patch_detach
19. budget_patch_init
20. budget_patch_exit

   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 */
  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 
  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 
  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 
  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 */
 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 
 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 
 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 
 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 
 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 
 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 
 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 
 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 
 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 
 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 
 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 
 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 */
 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 
 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 
 637 static int __init budget_patch_init(void)
 638 {
 639         return saa7146_register_extension(&budget_extension);
 640 }
 641 
 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");