1 /* 2 * Driver for 3 * Samsung S5H1420 and 4 * PnpNetwork PN1010 QPSK Demodulator 5 * 6 * Copyright (C) 2005 Andrew de Quincey <adq_dvb@lidskialf.net> 7 * Copyright (C) 2005-8 Patrick Boettcher <pb@linuxtv.org> 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, write to the Free Software 22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 23 */ 24 25 #include <linux/kernel.h> 26 #include <linux/module.h> 27 #include <linux/init.h> 28 #include <linux/string.h> 29 #include <linux/slab.h> 30 #include <linux/delay.h> 31 #include <linux/jiffies.h> 32 #include <asm/div64.h> 33 34 #include <linux/i2c.h> 35 36 37 #include "dvb_frontend.h" 38 #include "s5h1420.h" 39 #include "s5h1420_priv.h" 40 41 #define TONE_FREQ 22000 42 43 struct s5h1420_state { 44 struct i2c_adapter* i2c; 45 const struct s5h1420_config* config; 46 47 struct dvb_frontend frontend; 48 struct i2c_adapter tuner_i2c_adapter; 49 50 u8 CON_1_val; 51 52 u8 postlocked:1; 53 u32 fclk; 54 u32 tunedfreq; 55 enum fe_code_rate fec_inner; 56 u32 symbol_rate; 57 58 /* FIXME: ugly workaround for flexcop's incapable i2c-controller 59 * it does not support repeated-start, workaround: write addr-1 60 * and then read 61 */ 62 u8 shadow[256]; 63 }; 64 65 static u32 s5h1420_getsymbolrate(struct s5h1420_state* state); 66 static int s5h1420_get_tune_settings(struct dvb_frontend* fe, 67 struct dvb_frontend_tune_settings* fesettings); 68 69 70 static int debug; 71 module_param(debug, int, 0644); 72 MODULE_PARM_DESC(debug, "enable debugging"); 73 74 #define dprintk(x...) do { \ 75 if (debug) \ 76 printk(KERN_DEBUG "S5H1420: " x); \ 77 } while (0) 78 79 static u8 s5h1420_readreg(struct s5h1420_state *state, u8 reg) 80 { 81 int ret; 82 u8 b[2]; 83 struct i2c_msg msg[] = { 84 { .addr = state->config->demod_address, .flags = 0, .buf = b, .len = 2 }, 85 { .addr = state->config->demod_address, .flags = 0, .buf = ®, .len = 1 }, 86 { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b, .len = 1 }, 87 }; 88 89 b[0] = (reg - 1) & 0xff; 90 b[1] = state->shadow[(reg - 1) & 0xff]; 91 92 if (state->config->repeated_start_workaround) { 93 ret = i2c_transfer(state->i2c, msg, 3); 94 if (ret != 3) 95 return ret; 96 } else { 97 ret = i2c_transfer(state->i2c, &msg[1], 1); 98 if (ret != 1) 99 return ret; 100 ret = i2c_transfer(state->i2c, &msg[2], 1); 101 if (ret != 1) 102 return ret; 103 } 104 105 /* dprintk("rd(%02x): %02x %02x\n", state->config->demod_address, reg, b[0]); */ 106 107 return b[0]; 108 } 109 110 static int s5h1420_writereg (struct s5h1420_state* state, u8 reg, u8 data) 111 { 112 u8 buf[] = { reg, data }; 113 struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 }; 114 int err; 115 116 /* dprintk("wr(%02x): %02x %02x\n", state->config->demod_address, reg, data); */ 117 err = i2c_transfer(state->i2c, &msg, 1); 118 if (err != 1) { 119 dprintk("%s: writereg error (err == %i, reg == 0x%02x, data == 0x%02x)\n", __func__, err, reg, data); 120 return -EREMOTEIO; 121 } 122 state->shadow[reg] = data; 123 124 return 0; 125 } 126 127 static int s5h1420_set_voltage(struct dvb_frontend *fe, 128 enum fe_sec_voltage voltage) 129 { 130 struct s5h1420_state* state = fe->demodulator_priv; 131 132 dprintk("enter %s\n", __func__); 133 134 switch(voltage) { 135 case SEC_VOLTAGE_13: 136 s5h1420_writereg(state, 0x3c, 137 (s5h1420_readreg(state, 0x3c) & 0xfe) | 0x02); 138 break; 139 140 case SEC_VOLTAGE_18: 141 s5h1420_writereg(state, 0x3c, s5h1420_readreg(state, 0x3c) | 0x03); 142 break; 143 144 case SEC_VOLTAGE_OFF: 145 s5h1420_writereg(state, 0x3c, s5h1420_readreg(state, 0x3c) & 0xfd); 146 break; 147 } 148 149 dprintk("leave %s\n", __func__); 150 return 0; 151 } 152 153 static int s5h1420_set_tone(struct dvb_frontend *fe, 154 enum fe_sec_tone_mode tone) 155 { 156 struct s5h1420_state* state = fe->demodulator_priv; 157 158 dprintk("enter %s\n", __func__); 159 switch(tone) { 160 case SEC_TONE_ON: 161 s5h1420_writereg(state, 0x3b, 162 (s5h1420_readreg(state, 0x3b) & 0x74) | 0x08); 163 break; 164 165 case SEC_TONE_OFF: 166 s5h1420_writereg(state, 0x3b, 167 (s5h1420_readreg(state, 0x3b) & 0x74) | 0x01); 168 break; 169 } 170 dprintk("leave %s\n", __func__); 171 172 return 0; 173 } 174 175 static int s5h1420_send_master_cmd (struct dvb_frontend* fe, 176 struct dvb_diseqc_master_cmd* cmd) 177 { 178 struct s5h1420_state* state = fe->demodulator_priv; 179 u8 val; 180 int i; 181 unsigned long timeout; 182 int result = 0; 183 184 dprintk("enter %s\n", __func__); 185 if (cmd->msg_len > sizeof(cmd->msg)) 186 return -EINVAL; 187 188 /* setup for DISEQC */ 189 val = s5h1420_readreg(state, 0x3b); 190 s5h1420_writereg(state, 0x3b, 0x02); 191 msleep(15); 192 193 /* write the DISEQC command bytes */ 194 for(i=0; i< cmd->msg_len; i++) { 195 s5h1420_writereg(state, 0x3d + i, cmd->msg[i]); 196 } 197 198 /* kick off transmission */ 199 s5h1420_writereg(state, 0x3b, s5h1420_readreg(state, 0x3b) | 200 ((cmd->msg_len-1) << 4) | 0x08); 201 202 /* wait for transmission to complete */ 203 timeout = jiffies + ((100*HZ) / 1000); 204 while(time_before(jiffies, timeout)) { 205 if (!(s5h1420_readreg(state, 0x3b) & 0x08)) 206 break; 207 208 msleep(5); 209 } 210 if (time_after(jiffies, timeout)) 211 result = -ETIMEDOUT; 212 213 /* restore original settings */ 214 s5h1420_writereg(state, 0x3b, val); 215 msleep(15); 216 dprintk("leave %s\n", __func__); 217 return result; 218 } 219 220 static int s5h1420_recv_slave_reply (struct dvb_frontend* fe, 221 struct dvb_diseqc_slave_reply* reply) 222 { 223 struct s5h1420_state* state = fe->demodulator_priv; 224 u8 val; 225 int i; 226 int length; 227 unsigned long timeout; 228 int result = 0; 229 230 /* setup for DISEQC receive */ 231 val = s5h1420_readreg(state, 0x3b); 232 s5h1420_writereg(state, 0x3b, 0x82); /* FIXME: guess - do we need to set DIS_RDY(0x08) in receive mode? */ 233 msleep(15); 234 235 /* wait for reception to complete */ 236 timeout = jiffies + ((reply->timeout*HZ) / 1000); 237 while(time_before(jiffies, timeout)) { 238 if (!(s5h1420_readreg(state, 0x3b) & 0x80)) /* FIXME: do we test DIS_RDY(0x08) or RCV_EN(0x80)? */ 239 break; 240 241 msleep(5); 242 } 243 if (time_after(jiffies, timeout)) { 244 result = -ETIMEDOUT; 245 goto exit; 246 } 247 248 /* check error flag - FIXME: not sure what this does - docs do not describe 249 * beyond "error flag for diseqc receive data :( */ 250 if (s5h1420_readreg(state, 0x49)) { 251 result = -EIO; 252 goto exit; 253 } 254 255 /* check length */ 256 length = (s5h1420_readreg(state, 0x3b) & 0x70) >> 4; 257 if (length > sizeof(reply->msg)) { 258 result = -EOVERFLOW; 259 goto exit; 260 } 261 reply->msg_len = length; 262 263 /* extract data */ 264 for(i=0; i< length; i++) { 265 reply->msg[i] = s5h1420_readreg(state, 0x3d + i); 266 } 267 268 exit: 269 /* restore original settings */ 270 s5h1420_writereg(state, 0x3b, val); 271 msleep(15); 272 return result; 273 } 274 275 static int s5h1420_send_burst(struct dvb_frontend *fe, 276 enum fe_sec_mini_cmd minicmd) 277 { 278 struct s5h1420_state* state = fe->demodulator_priv; 279 u8 val; 280 int result = 0; 281 unsigned long timeout; 282 283 /* setup for tone burst */ 284 val = s5h1420_readreg(state, 0x3b); 285 s5h1420_writereg(state, 0x3b, (s5h1420_readreg(state, 0x3b) & 0x70) | 0x01); 286 287 /* set value for B position if requested */ 288 if (minicmd == SEC_MINI_B) { 289 s5h1420_writereg(state, 0x3b, s5h1420_readreg(state, 0x3b) | 0x04); 290 } 291 msleep(15); 292 293 /* start transmission */ 294 s5h1420_writereg(state, 0x3b, s5h1420_readreg(state, 0x3b) | 0x08); 295 296 /* wait for transmission to complete */ 297 timeout = jiffies + ((100*HZ) / 1000); 298 while(time_before(jiffies, timeout)) { 299 if (!(s5h1420_readreg(state, 0x3b) & 0x08)) 300 break; 301 302 msleep(5); 303 } 304 if (time_after(jiffies, timeout)) 305 result = -ETIMEDOUT; 306 307 /* restore original settings */ 308 s5h1420_writereg(state, 0x3b, val); 309 msleep(15); 310 return result; 311 } 312 313 static enum fe_status s5h1420_get_status_bits(struct s5h1420_state *state) 314 { 315 u8 val; 316 enum fe_status status = 0; 317 318 val = s5h1420_readreg(state, 0x14); 319 if (val & 0x02) 320 status |= FE_HAS_SIGNAL; 321 if (val & 0x01) 322 status |= FE_HAS_CARRIER; 323 val = s5h1420_readreg(state, 0x36); 324 if (val & 0x01) 325 status |= FE_HAS_VITERBI; 326 if (val & 0x20) 327 status |= FE_HAS_SYNC; 328 if (status == (FE_HAS_SIGNAL|FE_HAS_CARRIER|FE_HAS_VITERBI|FE_HAS_SYNC)) 329 status |= FE_HAS_LOCK; 330 331 return status; 332 } 333 334 static int s5h1420_read_status(struct dvb_frontend *fe, 335 enum fe_status *status) 336 { 337 struct s5h1420_state* state = fe->demodulator_priv; 338 u8 val; 339 340 dprintk("enter %s\n", __func__); 341 342 if (status == NULL) 343 return -EINVAL; 344 345 /* determine lock state */ 346 *status = s5h1420_get_status_bits(state); 347 348 /* fix for FEC 5/6 inversion issue - if it doesn't quite lock, invert 349 the inversion, wait a bit and check again */ 350 if (*status == (FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_VITERBI)) { 351 val = s5h1420_readreg(state, Vit10); 352 if ((val & 0x07) == 0x03) { 353 if (val & 0x08) 354 s5h1420_writereg(state, Vit09, 0x13); 355 else 356 s5h1420_writereg(state, Vit09, 0x1b); 357 358 /* wait a bit then update lock status */ 359 mdelay(200); 360 *status = s5h1420_get_status_bits(state); 361 } 362 } 363 364 /* perform post lock setup */ 365 if ((*status & FE_HAS_LOCK) && !state->postlocked) { 366 367 /* calculate the data rate */ 368 u32 tmp = s5h1420_getsymbolrate(state); 369 switch (s5h1420_readreg(state, Vit10) & 0x07) { 370 case 0: tmp = (tmp * 2 * 1) / 2; break; 371 case 1: tmp = (tmp * 2 * 2) / 3; break; 372 case 2: tmp = (tmp * 2 * 3) / 4; break; 373 case 3: tmp = (tmp * 2 * 5) / 6; break; 374 case 4: tmp = (tmp * 2 * 6) / 7; break; 375 case 5: tmp = (tmp * 2 * 7) / 8; break; 376 } 377 378 if (tmp == 0) { 379 printk(KERN_ERR "s5h1420: avoided division by 0\n"); 380 tmp = 1; 381 } 382 tmp = state->fclk / tmp; 383 384 385 /* set the MPEG_CLK_INTL for the calculated data rate */ 386 if (tmp < 2) 387 val = 0x00; 388 else if (tmp < 5) 389 val = 0x01; 390 else if (tmp < 9) 391 val = 0x02; 392 else if (tmp < 13) 393 val = 0x03; 394 else if (tmp < 17) 395 val = 0x04; 396 else if (tmp < 25) 397 val = 0x05; 398 else if (tmp < 33) 399 val = 0x06; 400 else 401 val = 0x07; 402 dprintk("for MPEG_CLK_INTL %d %x\n", tmp, val); 403 404 s5h1420_writereg(state, FEC01, 0x18); 405 s5h1420_writereg(state, FEC01, 0x10); 406 s5h1420_writereg(state, FEC01, val); 407 408 /* Enable "MPEG_Out" */ 409 val = s5h1420_readreg(state, Mpeg02); 410 s5h1420_writereg(state, Mpeg02, val | (1 << 6)); 411 412 /* kicker disable */ 413 val = s5h1420_readreg(state, QPSK01) & 0x7f; 414 s5h1420_writereg(state, QPSK01, val); 415 416 /* DC freeze TODO it was never activated by default or it can stay activated */ 417 418 if (s5h1420_getsymbolrate(state) >= 20000000) { 419 s5h1420_writereg(state, Loop04, 0x8a); 420 s5h1420_writereg(state, Loop05, 0x6a); 421 } else { 422 s5h1420_writereg(state, Loop04, 0x58); 423 s5h1420_writereg(state, Loop05, 0x27); 424 } 425 426 /* post-lock processing has been done! */ 427 state->postlocked = 1; 428 } 429 430 dprintk("leave %s\n", __func__); 431 432 return 0; 433 } 434 435 static int s5h1420_read_ber(struct dvb_frontend* fe, u32* ber) 436 { 437 struct s5h1420_state* state = fe->demodulator_priv; 438 439 s5h1420_writereg(state, 0x46, 0x1d); 440 mdelay(25); 441 442 *ber = (s5h1420_readreg(state, 0x48) << 8) | s5h1420_readreg(state, 0x47); 443 444 return 0; 445 } 446 447 static int s5h1420_read_signal_strength(struct dvb_frontend* fe, u16* strength) 448 { 449 struct s5h1420_state* state = fe->demodulator_priv; 450 451 u8 val = s5h1420_readreg(state, 0x15); 452 453 *strength = (u16) ((val << 8) | val); 454 455 return 0; 456 } 457 458 static int s5h1420_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks) 459 { 460 struct s5h1420_state* state = fe->demodulator_priv; 461 462 s5h1420_writereg(state, 0x46, 0x1f); 463 mdelay(25); 464 465 *ucblocks = (s5h1420_readreg(state, 0x48) << 8) | s5h1420_readreg(state, 0x47); 466 467 return 0; 468 } 469 470 static void s5h1420_reset(struct s5h1420_state* state) 471 { 472 dprintk("%s\n", __func__); 473 s5h1420_writereg (state, 0x01, 0x08); 474 s5h1420_writereg (state, 0x01, 0x00); 475 udelay(10); 476 } 477 478 static void s5h1420_setsymbolrate(struct s5h1420_state* state, 479 struct dtv_frontend_properties *p) 480 { 481 u8 v; 482 u64 val; 483 484 dprintk("enter %s\n", __func__); 485 486 val = ((u64) p->symbol_rate / 1000ULL) * (1ULL<<24); 487 if (p->symbol_rate < 29000000) 488 val *= 2; 489 do_div(val, (state->fclk / 1000)); 490 491 dprintk("symbol rate register: %06llx\n", (unsigned long long)val); 492 493 v = s5h1420_readreg(state, Loop01); 494 s5h1420_writereg(state, Loop01, v & 0x7f); 495 s5h1420_writereg(state, Tnco01, val >> 16); 496 s5h1420_writereg(state, Tnco02, val >> 8); 497 s5h1420_writereg(state, Tnco03, val & 0xff); 498 s5h1420_writereg(state, Loop01, v | 0x80); 499 dprintk("leave %s\n", __func__); 500 } 501 502 static u32 s5h1420_getsymbolrate(struct s5h1420_state* state) 503 { 504 return state->symbol_rate; 505 } 506 507 static void s5h1420_setfreqoffset(struct s5h1420_state* state, int freqoffset) 508 { 509 int val; 510 u8 v; 511 512 dprintk("enter %s\n", __func__); 513 514 /* remember freqoffset is in kHz, but the chip wants the offset in Hz, so 515 * divide fclk by 1000000 to get the correct value. */ 516 val = -(int) ((freqoffset * (1<<24)) / (state->fclk / 1000000)); 517 518 dprintk("phase rotator/freqoffset: %d %06x\n", freqoffset, val); 519 520 v = s5h1420_readreg(state, Loop01); 521 s5h1420_writereg(state, Loop01, v & 0xbf); 522 s5h1420_writereg(state, Pnco01, val >> 16); 523 s5h1420_writereg(state, Pnco02, val >> 8); 524 s5h1420_writereg(state, Pnco03, val & 0xff); 525 s5h1420_writereg(state, Loop01, v | 0x40); 526 dprintk("leave %s\n", __func__); 527 } 528 529 static int s5h1420_getfreqoffset(struct s5h1420_state* state) 530 { 531 int val; 532 533 s5h1420_writereg(state, 0x06, s5h1420_readreg(state, 0x06) | 0x08); 534 val = s5h1420_readreg(state, 0x0e) << 16; 535 val |= s5h1420_readreg(state, 0x0f) << 8; 536 val |= s5h1420_readreg(state, 0x10); 537 s5h1420_writereg(state, 0x06, s5h1420_readreg(state, 0x06) & 0xf7); 538 539 if (val & 0x800000) 540 val |= 0xff000000; 541 542 /* remember freqoffset is in kHz, but the chip wants the offset in Hz, so 543 * divide fclk by 1000000 to get the correct value. */ 544 val = (((-val) * (state->fclk/1000000)) / (1<<24)); 545 546 return val; 547 } 548 549 static void s5h1420_setfec_inversion(struct s5h1420_state* state, 550 struct dtv_frontend_properties *p) 551 { 552 u8 inversion = 0; 553 u8 vit08, vit09; 554 555 dprintk("enter %s\n", __func__); 556 557 if (p->inversion == INVERSION_OFF) 558 inversion = state->config->invert ? 0x08 : 0; 559 else if (p->inversion == INVERSION_ON) 560 inversion = state->config->invert ? 0 : 0x08; 561 562 if ((p->fec_inner == FEC_AUTO) || (p->inversion == INVERSION_AUTO)) { 563 vit08 = 0x3f; 564 vit09 = 0; 565 } else { 566 switch (p->fec_inner) { 567 case FEC_1_2: 568 vit08 = 0x01; 569 vit09 = 0x10; 570 break; 571 572 case FEC_2_3: 573 vit08 = 0x02; 574 vit09 = 0x11; 575 break; 576 577 case FEC_3_4: 578 vit08 = 0x04; 579 vit09 = 0x12; 580 break; 581 582 case FEC_5_6: 583 vit08 = 0x08; 584 vit09 = 0x13; 585 break; 586 587 case FEC_6_7: 588 vit08 = 0x10; 589 vit09 = 0x14; 590 break; 591 592 case FEC_7_8: 593 vit08 = 0x20; 594 vit09 = 0x15; 595 break; 596 597 default: 598 return; 599 } 600 } 601 vit09 |= inversion; 602 dprintk("fec: %02x %02x\n", vit08, vit09); 603 s5h1420_writereg(state, Vit08, vit08); 604 s5h1420_writereg(state, Vit09, vit09); 605 dprintk("leave %s\n", __func__); 606 } 607 608 static enum fe_code_rate s5h1420_getfec(struct s5h1420_state *state) 609 { 610 switch(s5h1420_readreg(state, 0x32) & 0x07) { 611 case 0: 612 return FEC_1_2; 613 614 case 1: 615 return FEC_2_3; 616 617 case 2: 618 return FEC_3_4; 619 620 case 3: 621 return FEC_5_6; 622 623 case 4: 624 return FEC_6_7; 625 626 case 5: 627 return FEC_7_8; 628 } 629 630 return FEC_NONE; 631 } 632 633 static enum fe_spectral_inversion 634 s5h1420_getinversion(struct s5h1420_state *state) 635 { 636 if (s5h1420_readreg(state, 0x32) & 0x08) 637 return INVERSION_ON; 638 639 return INVERSION_OFF; 640 } 641 642 static int s5h1420_set_frontend(struct dvb_frontend *fe) 643 { 644 struct dtv_frontend_properties *p = &fe->dtv_property_cache; 645 struct s5h1420_state* state = fe->demodulator_priv; 646 int frequency_delta; 647 struct dvb_frontend_tune_settings fesettings; 648 649 dprintk("enter %s\n", __func__); 650 651 /* check if we should do a fast-tune */ 652 s5h1420_get_tune_settings(fe, &fesettings); 653 frequency_delta = p->frequency - state->tunedfreq; 654 if ((frequency_delta > -fesettings.max_drift) && 655 (frequency_delta < fesettings.max_drift) && 656 (frequency_delta != 0) && 657 (state->fec_inner == p->fec_inner) && 658 (state->symbol_rate == p->symbol_rate)) { 659 660 if (fe->ops.tuner_ops.set_params) { 661 fe->ops.tuner_ops.set_params(fe); 662 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); 663 } 664 if (fe->ops.tuner_ops.get_frequency) { 665 u32 tmp; 666 fe->ops.tuner_ops.get_frequency(fe, &tmp); 667 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); 668 s5h1420_setfreqoffset(state, p->frequency - tmp); 669 } else { 670 s5h1420_setfreqoffset(state, 0); 671 } 672 dprintk("simple tune\n"); 673 return 0; 674 } 675 dprintk("tuning demod\n"); 676 677 /* first of all, software reset */ 678 s5h1420_reset(state); 679 680 /* set s5h1420 fclk PLL according to desired symbol rate */ 681 if (p->symbol_rate > 33000000) 682 state->fclk = 80000000; 683 else if (p->symbol_rate > 28500000) 684 state->fclk = 59000000; 685 else if (p->symbol_rate > 25000000) 686 state->fclk = 86000000; 687 else if (p->symbol_rate > 1900000) 688 state->fclk = 88000000; 689 else 690 state->fclk = 44000000; 691 692 dprintk("pll01: %d, ToneFreq: %d\n", state->fclk/1000000 - 8, (state->fclk + (TONE_FREQ * 32) - 1) / (TONE_FREQ * 32)); 693 s5h1420_writereg(state, PLL01, state->fclk/1000000 - 8); 694 s5h1420_writereg(state, PLL02, 0x40); 695 s5h1420_writereg(state, DiS01, (state->fclk + (TONE_FREQ * 32) - 1) / (TONE_FREQ * 32)); 696 697 /* TODO DC offset removal, config parameter ? */ 698 if (p->symbol_rate > 29000000) 699 s5h1420_writereg(state, QPSK01, 0xae | 0x10); 700 else 701 s5h1420_writereg(state, QPSK01, 0xac | 0x10); 702 703 /* set misc registers */ 704 s5h1420_writereg(state, CON_1, 0x00); 705 s5h1420_writereg(state, QPSK02, 0x00); 706 s5h1420_writereg(state, Pre01, 0xb0); 707 708 s5h1420_writereg(state, Loop01, 0xF0); 709 s5h1420_writereg(state, Loop02, 0x2a); /* e7 for s5h1420 */ 710 s5h1420_writereg(state, Loop03, 0x79); /* 78 for s5h1420 */ 711 if (p->symbol_rate > 20000000) 712 s5h1420_writereg(state, Loop04, 0x79); 713 else 714 s5h1420_writereg(state, Loop04, 0x58); 715 s5h1420_writereg(state, Loop05, 0x6b); 716 717 if (p->symbol_rate >= 8000000) 718 s5h1420_writereg(state, Post01, (0 << 6) | 0x10); 719 else if (p->symbol_rate >= 4000000) 720 s5h1420_writereg(state, Post01, (1 << 6) | 0x10); 721 else 722 s5h1420_writereg(state, Post01, (3 << 6) | 0x10); 723 724 s5h1420_writereg(state, Monitor12, 0x00); /* unfreeze DC compensation */ 725 726 s5h1420_writereg(state, Sync01, 0x33); 727 s5h1420_writereg(state, Mpeg01, state->config->cdclk_polarity); 728 s5h1420_writereg(state, Mpeg02, 0x3d); /* Parallel output more, disabled -> enabled later */ 729 s5h1420_writereg(state, Err01, 0x03); /* 0x1d for s5h1420 */ 730 731 s5h1420_writereg(state, Vit06, 0x6e); /* 0x8e for s5h1420 */ 732 s5h1420_writereg(state, DiS03, 0x00); 733 s5h1420_writereg(state, Rf01, 0x61); /* Tuner i2c address - for the gate controller */ 734 735 /* set tuner PLL */ 736 if (fe->ops.tuner_ops.set_params) { 737 fe->ops.tuner_ops.set_params(fe); 738 if (fe->ops.i2c_gate_ctrl) 739 fe->ops.i2c_gate_ctrl(fe, 0); 740 s5h1420_setfreqoffset(state, 0); 741 } 742 743 /* set the reset of the parameters */ 744 s5h1420_setsymbolrate(state, p); 745 s5h1420_setfec_inversion(state, p); 746 747 /* start QPSK */ 748 s5h1420_writereg(state, QPSK01, s5h1420_readreg(state, QPSK01) | 1); 749 750 state->fec_inner = p->fec_inner; 751 state->symbol_rate = p->symbol_rate; 752 state->postlocked = 0; 753 state->tunedfreq = p->frequency; 754 755 dprintk("leave %s\n", __func__); 756 return 0; 757 } 758 759 static int s5h1420_get_frontend(struct dvb_frontend* fe) 760 { 761 struct dtv_frontend_properties *p = &fe->dtv_property_cache; 762 struct s5h1420_state* state = fe->demodulator_priv; 763 764 p->frequency = state->tunedfreq + s5h1420_getfreqoffset(state); 765 p->inversion = s5h1420_getinversion(state); 766 p->symbol_rate = s5h1420_getsymbolrate(state); 767 p->fec_inner = s5h1420_getfec(state); 768 769 return 0; 770 } 771 772 static int s5h1420_get_tune_settings(struct dvb_frontend* fe, 773 struct dvb_frontend_tune_settings* fesettings) 774 { 775 struct dtv_frontend_properties *p = &fe->dtv_property_cache; 776 if (p->symbol_rate > 20000000) { 777 fesettings->min_delay_ms = 50; 778 fesettings->step_size = 2000; 779 fesettings->max_drift = 8000; 780 } else if (p->symbol_rate > 12000000) { 781 fesettings->min_delay_ms = 100; 782 fesettings->step_size = 1500; 783 fesettings->max_drift = 9000; 784 } else if (p->symbol_rate > 8000000) { 785 fesettings->min_delay_ms = 100; 786 fesettings->step_size = 1000; 787 fesettings->max_drift = 8000; 788 } else if (p->symbol_rate > 4000000) { 789 fesettings->min_delay_ms = 100; 790 fesettings->step_size = 500; 791 fesettings->max_drift = 7000; 792 } else if (p->symbol_rate > 2000000) { 793 fesettings->min_delay_ms = 200; 794 fesettings->step_size = (p->symbol_rate / 8000); 795 fesettings->max_drift = 14 * fesettings->step_size; 796 } else { 797 fesettings->min_delay_ms = 200; 798 fesettings->step_size = (p->symbol_rate / 8000); 799 fesettings->max_drift = 18 * fesettings->step_size; 800 } 801 802 return 0; 803 } 804 805 static int s5h1420_i2c_gate_ctrl(struct dvb_frontend* fe, int enable) 806 { 807 struct s5h1420_state* state = fe->demodulator_priv; 808 809 if (enable) 810 return s5h1420_writereg(state, 0x02, state->CON_1_val | 1); 811 else 812 return s5h1420_writereg(state, 0x02, state->CON_1_val & 0xfe); 813 } 814 815 static int s5h1420_init (struct dvb_frontend* fe) 816 { 817 struct s5h1420_state* state = fe->demodulator_priv; 818 819 /* disable power down and do reset */ 820 state->CON_1_val = state->config->serial_mpeg << 4; 821 s5h1420_writereg(state, 0x02, state->CON_1_val); 822 msleep(10); 823 s5h1420_reset(state); 824 825 return 0; 826 } 827 828 static int s5h1420_sleep(struct dvb_frontend* fe) 829 { 830 struct s5h1420_state* state = fe->demodulator_priv; 831 state->CON_1_val = 0x12; 832 return s5h1420_writereg(state, 0x02, state->CON_1_val); 833 } 834 835 static void s5h1420_release(struct dvb_frontend* fe) 836 { 837 struct s5h1420_state* state = fe->demodulator_priv; 838 i2c_del_adapter(&state->tuner_i2c_adapter); 839 kfree(state); 840 } 841 842 static u32 s5h1420_tuner_i2c_func(struct i2c_adapter *adapter) 843 { 844 return I2C_FUNC_I2C; 845 } 846 847 static int s5h1420_tuner_i2c_tuner_xfer(struct i2c_adapter *i2c_adap, struct i2c_msg msg[], int num) 848 { 849 struct s5h1420_state *state = i2c_get_adapdata(i2c_adap); 850 struct i2c_msg m[3]; 851 u8 tx_open[2] = { CON_1, state->CON_1_val | 1 }; /* repeater stops once there was a stop condition */ 852 853 if (1 + num > ARRAY_SIZE(m)) { 854 printk(KERN_WARNING 855 "%s: i2c xfer: num=%d is too big!\n", 856 KBUILD_MODNAME, num); 857 return -EOPNOTSUPP; 858 } 859 860 memset(m, 0, sizeof(struct i2c_msg) * (1 + num)); 861 862 m[0].addr = state->config->demod_address; 863 m[0].buf = tx_open; 864 m[0].len = 2; 865 866 memcpy(&m[1], msg, sizeof(struct i2c_msg) * num); 867 868 return i2c_transfer(state->i2c, m, 1 + num) == 1 + num ? num : -EIO; 869 } 870 871 static struct i2c_algorithm s5h1420_tuner_i2c_algo = { 872 .master_xfer = s5h1420_tuner_i2c_tuner_xfer, 873 .functionality = s5h1420_tuner_i2c_func, 874 }; 875 876 struct i2c_adapter *s5h1420_get_tuner_i2c_adapter(struct dvb_frontend *fe) 877 { 878 struct s5h1420_state *state = fe->demodulator_priv; 879 return &state->tuner_i2c_adapter; 880 } 881 EXPORT_SYMBOL(s5h1420_get_tuner_i2c_adapter); 882 883 static struct dvb_frontend_ops s5h1420_ops; 884 885 struct dvb_frontend *s5h1420_attach(const struct s5h1420_config *config, 886 struct i2c_adapter *i2c) 887 { 888 /* allocate memory for the internal state */ 889 struct s5h1420_state *state = kzalloc(sizeof(struct s5h1420_state), GFP_KERNEL); 890 u8 i; 891 892 if (state == NULL) 893 goto error; 894 895 /* setup the state */ 896 state->config = config; 897 state->i2c = i2c; 898 state->postlocked = 0; 899 state->fclk = 88000000; 900 state->tunedfreq = 0; 901 state->fec_inner = FEC_NONE; 902 state->symbol_rate = 0; 903 904 /* check if the demod is there + identify it */ 905 i = s5h1420_readreg(state, ID01); 906 if (i != 0x03) 907 goto error; 908 909 memset(state->shadow, 0xff, sizeof(state->shadow)); 910 911 for (i = 0; i < 0x50; i++) 912 state->shadow[i] = s5h1420_readreg(state, i); 913 914 /* create dvb_frontend */ 915 memcpy(&state->frontend.ops, &s5h1420_ops, sizeof(struct dvb_frontend_ops)); 916 state->frontend.demodulator_priv = state; 917 918 /* create tuner i2c adapter */ 919 strlcpy(state->tuner_i2c_adapter.name, "S5H1420-PN1010 tuner I2C bus", 920 sizeof(state->tuner_i2c_adapter.name)); 921 state->tuner_i2c_adapter.algo = &s5h1420_tuner_i2c_algo; 922 state->tuner_i2c_adapter.algo_data = NULL; 923 i2c_set_adapdata(&state->tuner_i2c_adapter, state); 924 if (i2c_add_adapter(&state->tuner_i2c_adapter) < 0) { 925 printk(KERN_ERR "S5H1420/PN1010: tuner i2c bus could not be initialized\n"); 926 goto error; 927 } 928 929 return &state->frontend; 930 931 error: 932 kfree(state); 933 return NULL; 934 } 935 EXPORT_SYMBOL(s5h1420_attach); 936 937 static struct dvb_frontend_ops s5h1420_ops = { 938 .delsys = { SYS_DVBS }, 939 .info = { 940 .name = "Samsung S5H1420/PnpNetwork PN1010 DVB-S", 941 .frequency_min = 950000, 942 .frequency_max = 2150000, 943 .frequency_stepsize = 125, /* kHz for QPSK frontends */ 944 .frequency_tolerance = 29500, 945 .symbol_rate_min = 1000000, 946 .symbol_rate_max = 45000000, 947 /* .symbol_rate_tolerance = ???,*/ 948 .caps = FE_CAN_INVERSION_AUTO | 949 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 | 950 FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO | 951 FE_CAN_QPSK 952 }, 953 954 .release = s5h1420_release, 955 956 .init = s5h1420_init, 957 .sleep = s5h1420_sleep, 958 .i2c_gate_ctrl = s5h1420_i2c_gate_ctrl, 959 960 .set_frontend = s5h1420_set_frontend, 961 .get_frontend = s5h1420_get_frontend, 962 .get_tune_settings = s5h1420_get_tune_settings, 963 964 .read_status = s5h1420_read_status, 965 .read_ber = s5h1420_read_ber, 966 .read_signal_strength = s5h1420_read_signal_strength, 967 .read_ucblocks = s5h1420_read_ucblocks, 968 969 .diseqc_send_master_cmd = s5h1420_send_master_cmd, 970 .diseqc_recv_slave_reply = s5h1420_recv_slave_reply, 971 .diseqc_send_burst = s5h1420_send_burst, 972 .set_tone = s5h1420_set_tone, 973 .set_voltage = s5h1420_set_voltage, 974 }; 975 976 MODULE_DESCRIPTION("Samsung S5H1420/PnpNetwork PN1010 DVB-S Demodulator driver"); 977 MODULE_AUTHOR("Andrew de Quincey, Patrick Boettcher"); 978 MODULE_LICENSE("GPL"); 979