1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 Driver for M88RS2000 demodulator and tuner 4 5 Copyright (C) 2012 Malcolm Priestley (tvboxspy@gmail.com) 6 Beta Driver 7 8 Include various calculation code from DS3000 driver. 9 Copyright (C) 2009 Konstantin Dimitrov. 10 11 12 */ 13 #include <linux/init.h> 14 #include <linux/module.h> 15 #include <linux/device.h> 16 #include <linux/jiffies.h> 17 #include <linux/string.h> 18 #include <linux/slab.h> 19 #include <linux/types.h> 20 21 22 #include <media/dvb_frontend.h> 23 #include "m88rs2000.h" 24 25 struct m88rs2000_state { 26 struct i2c_adapter *i2c; 27 const struct m88rs2000_config *config; 28 struct dvb_frontend frontend; 29 u8 no_lock_count; 30 u32 tuner_frequency; 31 u32 symbol_rate; 32 enum fe_code_rate fec_inner; 33 u8 tuner_level; 34 int errmode; 35 }; 36 37 static int m88rs2000_debug; 38 39 module_param_named(debug, m88rs2000_debug, int, 0644); 40 MODULE_PARM_DESC(debug, "set debugging level (1=info (or-able))."); 41 42 #define dprintk(level, args...) do { \ 43 if (level & m88rs2000_debug) \ 44 printk(KERN_DEBUG "m88rs2000-fe: " args); \ 45 } while (0) 46 47 #define deb_info(args...) dprintk(0x01, args) 48 #define info(format, arg...) \ 49 printk(KERN_INFO "m88rs2000-fe: " format "\n" , ## arg) 50 51 static int m88rs2000_writereg(struct m88rs2000_state *state, 52 u8 reg, u8 data) 53 { 54 int ret; 55 u8 buf[] = { reg, data }; 56 struct i2c_msg msg = { 57 .addr = state->config->demod_addr, 58 .flags = 0, 59 .buf = buf, 60 .len = 2 61 }; 62 63 ret = i2c_transfer(state->i2c, &msg, 1); 64 65 if (ret != 1) 66 deb_info("%s: writereg error (reg == 0x%02x, val == 0x%02x, ret == %i)\n", 67 __func__, reg, data, ret); 68 69 return (ret != 1) ? -EREMOTEIO : 0; 70 } 71 72 static u8 m88rs2000_readreg(struct m88rs2000_state *state, u8 reg) 73 { 74 int ret; 75 u8 b0[] = { reg }; 76 u8 b1[] = { 0 }; 77 78 struct i2c_msg msg[] = { 79 { 80 .addr = state->config->demod_addr, 81 .flags = 0, 82 .buf = b0, 83 .len = 1 84 }, { 85 .addr = state->config->demod_addr, 86 .flags = I2C_M_RD, 87 .buf = b1, 88 .len = 1 89 } 90 }; 91 92 ret = i2c_transfer(state->i2c, msg, 2); 93 94 if (ret != 2) 95 deb_info("%s: readreg error (reg == 0x%02x, ret == %i)\n", 96 __func__, reg, ret); 97 98 return b1[0]; 99 } 100 101 static u32 m88rs2000_get_mclk(struct dvb_frontend *fe) 102 { 103 struct m88rs2000_state *state = fe->demodulator_priv; 104 u32 mclk; 105 u8 reg; 106 /* Must not be 0x00 or 0xff */ 107 reg = m88rs2000_readreg(state, 0x86); 108 if (!reg || reg == 0xff) 109 return 0; 110 111 reg /= 2; 112 reg += 1; 113 114 mclk = (u32)(reg * RS2000_FE_CRYSTAL_KHZ + 28 / 2) / 28; 115 116 return mclk; 117 } 118 119 static int m88rs2000_set_carrieroffset(struct dvb_frontend *fe, s16 offset) 120 { 121 struct m88rs2000_state *state = fe->demodulator_priv; 122 u32 mclk; 123 s32 tmp; 124 u8 reg; 125 int ret; 126 127 mclk = m88rs2000_get_mclk(fe); 128 if (!mclk) 129 return -EINVAL; 130 131 tmp = (offset * 4096 + (s32)mclk / 2) / (s32)mclk; 132 if (tmp < 0) 133 tmp += 4096; 134 135 /* Carrier Offset */ 136 ret = m88rs2000_writereg(state, 0x9c, (u8)(tmp >> 4)); 137 138 reg = m88rs2000_readreg(state, 0x9d); 139 reg &= 0xf; 140 reg |= (u8)(tmp & 0xf) << 4; 141 142 ret |= m88rs2000_writereg(state, 0x9d, reg); 143 144 return ret; 145 } 146 147 static int m88rs2000_set_symbolrate(struct dvb_frontend *fe, u32 srate) 148 { 149 struct m88rs2000_state *state = fe->demodulator_priv; 150 int ret; 151 u64 temp; 152 u32 mclk; 153 u8 b[3]; 154 155 if ((srate < 1000000) || (srate > 45000000)) 156 return -EINVAL; 157 158 mclk = m88rs2000_get_mclk(fe); 159 if (!mclk) 160 return -EINVAL; 161 162 temp = srate / 1000; 163 temp *= 1 << 24; 164 165 do_div(temp, mclk); 166 167 b[0] = (u8) (temp >> 16) & 0xff; 168 b[1] = (u8) (temp >> 8) & 0xff; 169 b[2] = (u8) temp & 0xff; 170 171 ret = m88rs2000_writereg(state, 0x93, b[2]); 172 ret |= m88rs2000_writereg(state, 0x94, b[1]); 173 ret |= m88rs2000_writereg(state, 0x95, b[0]); 174 175 if (srate > 10000000) 176 ret |= m88rs2000_writereg(state, 0xa0, 0x20); 177 else 178 ret |= m88rs2000_writereg(state, 0xa0, 0x60); 179 180 ret |= m88rs2000_writereg(state, 0xa1, 0xe0); 181 182 if (srate > 12000000) 183 ret |= m88rs2000_writereg(state, 0xa3, 0x20); 184 else if (srate > 2800000) 185 ret |= m88rs2000_writereg(state, 0xa3, 0x98); 186 else 187 ret |= m88rs2000_writereg(state, 0xa3, 0x90); 188 189 deb_info("m88rs2000: m88rs2000_set_symbolrate\n"); 190 return ret; 191 } 192 193 static int m88rs2000_send_diseqc_msg(struct dvb_frontend *fe, 194 struct dvb_diseqc_master_cmd *m) 195 { 196 struct m88rs2000_state *state = fe->demodulator_priv; 197 198 int i; 199 u8 reg; 200 deb_info("%s\n", __func__); 201 m88rs2000_writereg(state, 0x9a, 0x30); 202 reg = m88rs2000_readreg(state, 0xb2); 203 reg &= 0x3f; 204 m88rs2000_writereg(state, 0xb2, reg); 205 for (i = 0; i < m->msg_len; i++) 206 m88rs2000_writereg(state, 0xb3 + i, m->msg[i]); 207 208 reg = m88rs2000_readreg(state, 0xb1); 209 reg &= 0x87; 210 reg |= ((m->msg_len - 1) << 3) | 0x07; 211 reg &= 0x7f; 212 m88rs2000_writereg(state, 0xb1, reg); 213 214 for (i = 0; i < 15; i++) { 215 if ((m88rs2000_readreg(state, 0xb1) & 0x40) == 0x0) 216 break; 217 msleep(20); 218 } 219 220 reg = m88rs2000_readreg(state, 0xb1); 221 if ((reg & 0x40) > 0x0) { 222 reg &= 0x7f; 223 reg |= 0x40; 224 m88rs2000_writereg(state, 0xb1, reg); 225 } 226 227 reg = m88rs2000_readreg(state, 0xb2); 228 reg &= 0x3f; 229 reg |= 0x80; 230 m88rs2000_writereg(state, 0xb2, reg); 231 m88rs2000_writereg(state, 0x9a, 0xb0); 232 233 234 return 0; 235 } 236 237 static int m88rs2000_send_diseqc_burst(struct dvb_frontend *fe, 238 enum fe_sec_mini_cmd burst) 239 { 240 struct m88rs2000_state *state = fe->demodulator_priv; 241 u8 reg0, reg1; 242 deb_info("%s\n", __func__); 243 m88rs2000_writereg(state, 0x9a, 0x30); 244 msleep(50); 245 reg0 = m88rs2000_readreg(state, 0xb1); 246 reg1 = m88rs2000_readreg(state, 0xb2); 247 /* TODO complete this section */ 248 m88rs2000_writereg(state, 0xb2, reg1); 249 m88rs2000_writereg(state, 0xb1, reg0); 250 m88rs2000_writereg(state, 0x9a, 0xb0); 251 252 return 0; 253 } 254 255 static int m88rs2000_set_tone(struct dvb_frontend *fe, 256 enum fe_sec_tone_mode tone) 257 { 258 struct m88rs2000_state *state = fe->demodulator_priv; 259 u8 reg0, reg1; 260 m88rs2000_writereg(state, 0x9a, 0x30); 261 reg0 = m88rs2000_readreg(state, 0xb1); 262 reg1 = m88rs2000_readreg(state, 0xb2); 263 264 reg1 &= 0x3f; 265 266 switch (tone) { 267 case SEC_TONE_ON: 268 reg0 |= 0x4; 269 reg0 &= 0xbc; 270 break; 271 case SEC_TONE_OFF: 272 reg1 |= 0x80; 273 break; 274 default: 275 break; 276 } 277 m88rs2000_writereg(state, 0xb2, reg1); 278 m88rs2000_writereg(state, 0xb1, reg0); 279 m88rs2000_writereg(state, 0x9a, 0xb0); 280 return 0; 281 } 282 283 struct inittab { 284 u8 cmd; 285 u8 reg; 286 u8 val; 287 }; 288 289 static struct inittab m88rs2000_setup[] = { 290 {DEMOD_WRITE, 0x9a, 0x30}, 291 {DEMOD_WRITE, 0x00, 0x01}, 292 {WRITE_DELAY, 0x19, 0x00}, 293 {DEMOD_WRITE, 0x00, 0x00}, 294 {DEMOD_WRITE, 0x9a, 0xb0}, 295 {DEMOD_WRITE, 0x81, 0xc1}, 296 {DEMOD_WRITE, 0x81, 0x81}, 297 {DEMOD_WRITE, 0x86, 0xc6}, 298 {DEMOD_WRITE, 0x9a, 0x30}, 299 {DEMOD_WRITE, 0xf0, 0x22}, 300 {DEMOD_WRITE, 0xf1, 0xbf}, 301 {DEMOD_WRITE, 0xb0, 0x45}, 302 {DEMOD_WRITE, 0xb2, 0x01}, /* set voltage pin always set 1*/ 303 {DEMOD_WRITE, 0x9a, 0xb0}, 304 {0xff, 0xaa, 0xff} 305 }; 306 307 static struct inittab m88rs2000_shutdown[] = { 308 {DEMOD_WRITE, 0x9a, 0x30}, 309 {DEMOD_WRITE, 0xb0, 0x00}, 310 {DEMOD_WRITE, 0xf1, 0x89}, 311 {DEMOD_WRITE, 0x00, 0x01}, 312 {DEMOD_WRITE, 0x9a, 0xb0}, 313 {DEMOD_WRITE, 0x81, 0x81}, 314 {0xff, 0xaa, 0xff} 315 }; 316 317 static struct inittab fe_reset[] = { 318 {DEMOD_WRITE, 0x00, 0x01}, 319 {DEMOD_WRITE, 0x20, 0x81}, 320 {DEMOD_WRITE, 0x21, 0x80}, 321 {DEMOD_WRITE, 0x10, 0x33}, 322 {DEMOD_WRITE, 0x11, 0x44}, 323 {DEMOD_WRITE, 0x12, 0x07}, 324 {DEMOD_WRITE, 0x18, 0x20}, 325 {DEMOD_WRITE, 0x28, 0x04}, 326 {DEMOD_WRITE, 0x29, 0x8e}, 327 {DEMOD_WRITE, 0x3b, 0xff}, 328 {DEMOD_WRITE, 0x32, 0x10}, 329 {DEMOD_WRITE, 0x33, 0x02}, 330 {DEMOD_WRITE, 0x34, 0x30}, 331 {DEMOD_WRITE, 0x35, 0xff}, 332 {DEMOD_WRITE, 0x38, 0x50}, 333 {DEMOD_WRITE, 0x39, 0x68}, 334 {DEMOD_WRITE, 0x3c, 0x7f}, 335 {DEMOD_WRITE, 0x3d, 0x0f}, 336 {DEMOD_WRITE, 0x45, 0x20}, 337 {DEMOD_WRITE, 0x46, 0x24}, 338 {DEMOD_WRITE, 0x47, 0x7c}, 339 {DEMOD_WRITE, 0x48, 0x16}, 340 {DEMOD_WRITE, 0x49, 0x04}, 341 {DEMOD_WRITE, 0x4a, 0x01}, 342 {DEMOD_WRITE, 0x4b, 0x78}, 343 {DEMOD_WRITE, 0X4d, 0xd2}, 344 {DEMOD_WRITE, 0x4e, 0x6d}, 345 {DEMOD_WRITE, 0x50, 0x30}, 346 {DEMOD_WRITE, 0x51, 0x30}, 347 {DEMOD_WRITE, 0x54, 0x7b}, 348 {DEMOD_WRITE, 0x56, 0x09}, 349 {DEMOD_WRITE, 0x58, 0x59}, 350 {DEMOD_WRITE, 0x59, 0x37}, 351 {DEMOD_WRITE, 0x63, 0xfa}, 352 {0xff, 0xaa, 0xff} 353 }; 354 355 static struct inittab fe_trigger[] = { 356 {DEMOD_WRITE, 0x97, 0x04}, 357 {DEMOD_WRITE, 0x99, 0x77}, 358 {DEMOD_WRITE, 0x9b, 0x64}, 359 {DEMOD_WRITE, 0x9e, 0x00}, 360 {DEMOD_WRITE, 0x9f, 0xf8}, 361 {DEMOD_WRITE, 0x98, 0xff}, 362 {DEMOD_WRITE, 0xc0, 0x0f}, 363 {DEMOD_WRITE, 0x89, 0x01}, 364 {DEMOD_WRITE, 0x00, 0x00}, 365 {WRITE_DELAY, 0x0a, 0x00}, 366 {DEMOD_WRITE, 0x00, 0x01}, 367 {DEMOD_WRITE, 0x00, 0x00}, 368 {DEMOD_WRITE, 0x9a, 0xb0}, 369 {0xff, 0xaa, 0xff} 370 }; 371 372 static int m88rs2000_tab_set(struct m88rs2000_state *state, 373 struct inittab *tab) 374 { 375 int ret = 0; 376 u8 i; 377 if (tab == NULL) 378 return -EINVAL; 379 380 for (i = 0; i < 255; i++) { 381 switch (tab[i].cmd) { 382 case 0x01: 383 ret = m88rs2000_writereg(state, tab[i].reg, 384 tab[i].val); 385 break; 386 case 0x10: 387 if (tab[i].reg > 0) 388 mdelay(tab[i].reg); 389 break; 390 case 0xff: 391 if (tab[i].reg == 0xaa && tab[i].val == 0xff) 392 return 0; 393 case 0x00: 394 break; 395 default: 396 return -EINVAL; 397 } 398 if (ret < 0) 399 return -ENODEV; 400 } 401 return 0; 402 } 403 404 static int m88rs2000_set_voltage(struct dvb_frontend *fe, 405 enum fe_sec_voltage volt) 406 { 407 struct m88rs2000_state *state = fe->demodulator_priv; 408 u8 data; 409 410 data = m88rs2000_readreg(state, 0xb2); 411 data |= 0x03; /* bit0 V/H, bit1 off/on */ 412 413 switch (volt) { 414 case SEC_VOLTAGE_18: 415 data &= ~0x03; 416 break; 417 case SEC_VOLTAGE_13: 418 data &= ~0x03; 419 data |= 0x01; 420 break; 421 case SEC_VOLTAGE_OFF: 422 break; 423 } 424 425 m88rs2000_writereg(state, 0xb2, data); 426 427 return 0; 428 } 429 430 static int m88rs2000_init(struct dvb_frontend *fe) 431 { 432 struct m88rs2000_state *state = fe->demodulator_priv; 433 int ret; 434 435 deb_info("m88rs2000: init chip\n"); 436 /* Setup frontend from shutdown/cold */ 437 if (state->config->inittab) 438 ret = m88rs2000_tab_set(state, 439 (struct inittab *)state->config->inittab); 440 else 441 ret = m88rs2000_tab_set(state, m88rs2000_setup); 442 443 return ret; 444 } 445 446 static int m88rs2000_sleep(struct dvb_frontend *fe) 447 { 448 struct m88rs2000_state *state = fe->demodulator_priv; 449 int ret; 450 /* Shutdown the frondend */ 451 ret = m88rs2000_tab_set(state, m88rs2000_shutdown); 452 return ret; 453 } 454 455 static int m88rs2000_read_status(struct dvb_frontend *fe, 456 enum fe_status *status) 457 { 458 struct m88rs2000_state *state = fe->demodulator_priv; 459 u8 reg = m88rs2000_readreg(state, 0x8c); 460 461 *status = 0; 462 463 if ((reg & 0xee) == 0xee) { 464 *status = FE_HAS_CARRIER | FE_HAS_SIGNAL | FE_HAS_VITERBI 465 | FE_HAS_SYNC | FE_HAS_LOCK; 466 if (state->config->set_ts_params) 467 state->config->set_ts_params(fe, CALL_IS_READ); 468 } 469 return 0; 470 } 471 472 static int m88rs2000_read_ber(struct dvb_frontend *fe, u32 *ber) 473 { 474 struct m88rs2000_state *state = fe->demodulator_priv; 475 u8 tmp0, tmp1; 476 477 m88rs2000_writereg(state, 0x9a, 0x30); 478 tmp0 = m88rs2000_readreg(state, 0xd8); 479 if ((tmp0 & 0x10) != 0) { 480 m88rs2000_writereg(state, 0x9a, 0xb0); 481 *ber = 0xffffffff; 482 return 0; 483 } 484 485 *ber = (m88rs2000_readreg(state, 0xd7) << 8) | 486 m88rs2000_readreg(state, 0xd6); 487 488 tmp1 = m88rs2000_readreg(state, 0xd9); 489 m88rs2000_writereg(state, 0xd9, (tmp1 & ~7) | 4); 490 /* needs twice */ 491 m88rs2000_writereg(state, 0xd8, (tmp0 & ~8) | 0x30); 492 m88rs2000_writereg(state, 0xd8, (tmp0 & ~8) | 0x30); 493 m88rs2000_writereg(state, 0x9a, 0xb0); 494 495 return 0; 496 } 497 498 static int m88rs2000_read_signal_strength(struct dvb_frontend *fe, 499 u16 *strength) 500 { 501 if (fe->ops.tuner_ops.get_rf_strength) 502 fe->ops.tuner_ops.get_rf_strength(fe, strength); 503 504 return 0; 505 } 506 507 static int m88rs2000_read_snr(struct dvb_frontend *fe, u16 *snr) 508 { 509 struct m88rs2000_state *state = fe->demodulator_priv; 510 511 *snr = 512 * m88rs2000_readreg(state, 0x65); 512 513 return 0; 514 } 515 516 static int m88rs2000_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) 517 { 518 struct m88rs2000_state *state = fe->demodulator_priv; 519 u8 tmp; 520 521 *ucblocks = (m88rs2000_readreg(state, 0xd5) << 8) | 522 m88rs2000_readreg(state, 0xd4); 523 tmp = m88rs2000_readreg(state, 0xd8); 524 m88rs2000_writereg(state, 0xd8, tmp & ~0x20); 525 /* needs two times */ 526 m88rs2000_writereg(state, 0xd8, tmp | 0x20); 527 m88rs2000_writereg(state, 0xd8, tmp | 0x20); 528 529 return 0; 530 } 531 532 static int m88rs2000_set_fec(struct m88rs2000_state *state, 533 enum fe_code_rate fec) 534 { 535 u8 fec_set, reg; 536 int ret; 537 538 switch (fec) { 539 case FEC_1_2: 540 fec_set = 0x8; 541 break; 542 case FEC_2_3: 543 fec_set = 0x10; 544 break; 545 case FEC_3_4: 546 fec_set = 0x20; 547 break; 548 case FEC_5_6: 549 fec_set = 0x40; 550 break; 551 case FEC_7_8: 552 fec_set = 0x80; 553 break; 554 case FEC_AUTO: 555 default: 556 fec_set = 0x0; 557 } 558 559 reg = m88rs2000_readreg(state, 0x70); 560 reg &= 0x7; 561 ret = m88rs2000_writereg(state, 0x70, reg | fec_set); 562 563 ret |= m88rs2000_writereg(state, 0x76, 0x8); 564 565 return ret; 566 } 567 568 static enum fe_code_rate m88rs2000_get_fec(struct m88rs2000_state *state) 569 { 570 u8 reg; 571 m88rs2000_writereg(state, 0x9a, 0x30); 572 reg = m88rs2000_readreg(state, 0x76); 573 m88rs2000_writereg(state, 0x9a, 0xb0); 574 575 reg &= 0xf0; 576 reg >>= 5; 577 578 switch (reg) { 579 case 0x4: 580 return FEC_1_2; 581 case 0x3: 582 return FEC_2_3; 583 case 0x2: 584 return FEC_3_4; 585 case 0x1: 586 return FEC_5_6; 587 case 0x0: 588 return FEC_7_8; 589 default: 590 break; 591 } 592 593 return FEC_AUTO; 594 } 595 596 static int m88rs2000_set_frontend(struct dvb_frontend *fe) 597 { 598 struct m88rs2000_state *state = fe->demodulator_priv; 599 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 600 enum fe_status status = 0; 601 int i, ret = 0; 602 u32 tuner_freq; 603 s16 offset = 0; 604 u8 reg; 605 606 state->no_lock_count = 0; 607 608 if (c->delivery_system != SYS_DVBS) { 609 deb_info("%s: unsupported delivery system selected (%d)\n", 610 __func__, c->delivery_system); 611 return -EOPNOTSUPP; 612 } 613 614 /* Set Tuner */ 615 if (fe->ops.tuner_ops.set_params) 616 ret = fe->ops.tuner_ops.set_params(fe); 617 618 if (ret < 0) 619 return -ENODEV; 620 621 if (fe->ops.tuner_ops.get_frequency) { 622 ret = fe->ops.tuner_ops.get_frequency(fe, &tuner_freq); 623 624 if (ret < 0) 625 return -ENODEV; 626 627 offset = (s16)((s32)tuner_freq - c->frequency); 628 } else { 629 offset = 0; 630 } 631 632 /* default mclk value 96.4285 * 2 * 1000 = 192857 */ 633 if (((c->frequency % 192857) >= (192857 - 3000)) || 634 (c->frequency % 192857) <= 3000) 635 ret = m88rs2000_writereg(state, 0x86, 0xc2); 636 else 637 ret = m88rs2000_writereg(state, 0x86, 0xc6); 638 639 ret |= m88rs2000_set_carrieroffset(fe, offset); 640 if (ret < 0) 641 return -ENODEV; 642 643 /* Reset demod by symbol rate */ 644 if (c->symbol_rate > 27500000) 645 ret = m88rs2000_writereg(state, 0xf1, 0xa4); 646 else 647 ret = m88rs2000_writereg(state, 0xf1, 0xbf); 648 649 ret |= m88rs2000_tab_set(state, fe_reset); 650 if (ret < 0) 651 return -ENODEV; 652 653 /* Set FEC */ 654 ret = m88rs2000_set_fec(state, c->fec_inner); 655 ret |= m88rs2000_writereg(state, 0x85, 0x1); 656 ret |= m88rs2000_writereg(state, 0x8a, 0xbf); 657 ret |= m88rs2000_writereg(state, 0x8d, 0x1e); 658 ret |= m88rs2000_writereg(state, 0x90, 0xf1); 659 ret |= m88rs2000_writereg(state, 0x91, 0x08); 660 661 if (ret < 0) 662 return -ENODEV; 663 664 /* Set Symbol Rate */ 665 ret = m88rs2000_set_symbolrate(fe, c->symbol_rate); 666 if (ret < 0) 667 return -ENODEV; 668 669 /* Set up Demod */ 670 ret = m88rs2000_tab_set(state, fe_trigger); 671 if (ret < 0) 672 return -ENODEV; 673 674 for (i = 0; i < 25; i++) { 675 reg = m88rs2000_readreg(state, 0x8c); 676 if ((reg & 0xee) == 0xee) { 677 status = FE_HAS_LOCK; 678 break; 679 } 680 state->no_lock_count++; 681 if (state->no_lock_count == 15) { 682 reg = m88rs2000_readreg(state, 0x70); 683 reg ^= 0x4; 684 m88rs2000_writereg(state, 0x70, reg); 685 state->no_lock_count = 0; 686 } 687 msleep(20); 688 } 689 690 if (status & FE_HAS_LOCK) { 691 state->fec_inner = m88rs2000_get_fec(state); 692 /* Unknown suspect SNR level */ 693 reg = m88rs2000_readreg(state, 0x65); 694 } 695 696 state->tuner_frequency = c->frequency; 697 state->symbol_rate = c->symbol_rate; 698 return 0; 699 } 700 701 static int m88rs2000_get_frontend(struct dvb_frontend *fe, 702 struct dtv_frontend_properties *c) 703 { 704 struct m88rs2000_state *state = fe->demodulator_priv; 705 706 c->fec_inner = state->fec_inner; 707 c->frequency = state->tuner_frequency; 708 c->symbol_rate = state->symbol_rate; 709 return 0; 710 } 711 712 static int m88rs2000_get_tune_settings(struct dvb_frontend *fe, 713 struct dvb_frontend_tune_settings *tune) 714 { 715 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 716 717 if (c->symbol_rate > 3000000) 718 tune->min_delay_ms = 2000; 719 else 720 tune->min_delay_ms = 3000; 721 722 tune->step_size = c->symbol_rate / 16000; 723 tune->max_drift = c->symbol_rate / 2000; 724 725 return 0; 726 } 727 728 static int m88rs2000_i2c_gate_ctrl(struct dvb_frontend *fe, int enable) 729 { 730 struct m88rs2000_state *state = fe->demodulator_priv; 731 732 if (enable) 733 m88rs2000_writereg(state, 0x81, 0x84); 734 else 735 m88rs2000_writereg(state, 0x81, 0x81); 736 udelay(10); 737 return 0; 738 } 739 740 static void m88rs2000_release(struct dvb_frontend *fe) 741 { 742 struct m88rs2000_state *state = fe->demodulator_priv; 743 kfree(state); 744 } 745 746 static const struct dvb_frontend_ops m88rs2000_ops = { 747 .delsys = { SYS_DVBS }, 748 .info = { 749 .name = "M88RS2000 DVB-S", 750 .frequency_min_hz = 950 * MHz, 751 .frequency_max_hz = 2150 * MHz, 752 .frequency_stepsize_hz = 1 * MHz, 753 .frequency_tolerance_hz = 5 * MHz, 754 .symbol_rate_min = 1000000, 755 .symbol_rate_max = 45000000, 756 .symbol_rate_tolerance = 500, /* ppm */ 757 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 | 758 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | 759 FE_CAN_QPSK | FE_CAN_INVERSION_AUTO | 760 FE_CAN_FEC_AUTO 761 }, 762 763 .release = m88rs2000_release, 764 .init = m88rs2000_init, 765 .sleep = m88rs2000_sleep, 766 .i2c_gate_ctrl = m88rs2000_i2c_gate_ctrl, 767 .read_status = m88rs2000_read_status, 768 .read_ber = m88rs2000_read_ber, 769 .read_signal_strength = m88rs2000_read_signal_strength, 770 .read_snr = m88rs2000_read_snr, 771 .read_ucblocks = m88rs2000_read_ucblocks, 772 .diseqc_send_master_cmd = m88rs2000_send_diseqc_msg, 773 .diseqc_send_burst = m88rs2000_send_diseqc_burst, 774 .set_tone = m88rs2000_set_tone, 775 .set_voltage = m88rs2000_set_voltage, 776 777 .set_frontend = m88rs2000_set_frontend, 778 .get_frontend = m88rs2000_get_frontend, 779 .get_tune_settings = m88rs2000_get_tune_settings, 780 }; 781 782 struct dvb_frontend *m88rs2000_attach(const struct m88rs2000_config *config, 783 struct i2c_adapter *i2c) 784 { 785 struct m88rs2000_state *state = NULL; 786 787 /* allocate memory for the internal state */ 788 state = kzalloc(sizeof(struct m88rs2000_state), GFP_KERNEL); 789 if (state == NULL) 790 goto error; 791 792 /* setup the state */ 793 state->config = config; 794 state->i2c = i2c; 795 state->tuner_frequency = 0; 796 state->symbol_rate = 0; 797 state->fec_inner = 0; 798 799 /* create dvb_frontend */ 800 memcpy(&state->frontend.ops, &m88rs2000_ops, 801 sizeof(struct dvb_frontend_ops)); 802 state->frontend.demodulator_priv = state; 803 return &state->frontend; 804 805 error: 806 kfree(state); 807 808 return NULL; 809 } 810 EXPORT_SYMBOL(m88rs2000_attach); 811 812 MODULE_DESCRIPTION("M88RS2000 DVB-S Demodulator driver"); 813 MODULE_AUTHOR("Malcolm Priestley tvboxspy@gmail.com"); 814 MODULE_LICENSE("GPL"); 815 MODULE_VERSION("1.13"); 816 817