1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 Conexant cx24120/cx24118 - DVBS/S2 Satellite demod/tuner driver 4 5 Copyright (C) 2008 Patrick Boettcher <pb@linuxtv.org> 6 Copyright (C) 2009 Sergey Tyurin <forum.free-x.de> 7 Updated 2012 by Jannis Achstetter <jannis_achstetter@web.de> 8 Copyright (C) 2015 Jemma Denson <jdenson@gmail.com> 9 April 2015 10 Refactored & simplified driver 11 Updated to work with delivery system supplied by DVBv5 12 Add frequency, fec & pilot to get_frontend 13 14 Cards supported: Technisat Skystar S2 15 16 */ 17 18 #include <linux/slab.h> 19 #include <linux/kernel.h> 20 #include <linux/module.h> 21 #include <linux/moduleparam.h> 22 #include <linux/init.h> 23 #include <linux/firmware.h> 24 #include <media/dvb_frontend.h> 25 #include "cx24120.h" 26 27 #define CX24120_SEARCH_RANGE_KHZ 5000 28 #define CX24120_FIRMWARE "dvb-fe-cx24120-1.20.58.2.fw" 29 30 /* cx24120 i2c registers */ 31 #define CX24120_REG_CMD_START 0x00 /* write cmd_id */ 32 #define CX24120_REG_CMD_ARGS 0x01 /* write command arguments */ 33 #define CX24120_REG_CMD_END 0x1f /* write 0x01 for end */ 34 35 #define CX24120_REG_MAILBOX 0x33 36 #define CX24120_REG_FREQ3 0x34 /* frequency */ 37 #define CX24120_REG_FREQ2 0x35 38 #define CX24120_REG_FREQ1 0x36 39 40 #define CX24120_REG_FECMODE 0x39 /* FEC status */ 41 #define CX24120_REG_STATUS 0x3a /* Tuner status */ 42 #define CX24120_REG_SIGSTR_H 0x3a /* Signal strength high */ 43 #define CX24120_REG_SIGSTR_L 0x3b /* Signal strength low byte */ 44 #define CX24120_REG_QUALITY_H 0x40 /* SNR high byte */ 45 #define CX24120_REG_QUALITY_L 0x41 /* SNR low byte */ 46 47 #define CX24120_REG_BER_HH 0x47 /* BER high byte of high word */ 48 #define CX24120_REG_BER_HL 0x48 /* BER low byte of high word */ 49 #define CX24120_REG_BER_LH 0x49 /* BER high byte of low word */ 50 #define CX24120_REG_BER_LL 0x4a /* BER low byte of low word */ 51 52 #define CX24120_REG_UCB_H 0x50 /* UCB high byte */ 53 #define CX24120_REG_UCB_L 0x51 /* UCB low byte */ 54 55 #define CX24120_REG_CLKDIV 0xe6 56 #define CX24120_REG_RATEDIV 0xf0 57 58 #define CX24120_REG_REVISION 0xff /* Chip revision (ro) */ 59 60 /* Command messages */ 61 enum command_message_id { 62 CMD_VCO_SET = 0x10, /* cmd.len = 12; */ 63 CMD_TUNEREQUEST = 0x11, /* cmd.len = 15; */ 64 65 CMD_MPEG_ONOFF = 0x13, /* cmd.len = 4; */ 66 CMD_MPEG_INIT = 0x14, /* cmd.len = 7; */ 67 CMD_BANDWIDTH = 0x15, /* cmd.len = 12; */ 68 CMD_CLOCK_READ = 0x16, /* read clock */ 69 CMD_CLOCK_SET = 0x17, /* cmd.len = 10; */ 70 71 CMD_DISEQC_MSG1 = 0x20, /* cmd.len = 11; */ 72 CMD_DISEQC_MSG2 = 0x21, /* cmd.len = d->msg_len + 6; */ 73 CMD_SETVOLTAGE = 0x22, /* cmd.len = 2; */ 74 CMD_SETTONE = 0x23, /* cmd.len = 4; */ 75 CMD_DISEQC_BURST = 0x24, /* cmd.len not used !!! */ 76 77 CMD_READ_SNR = 0x1a, /* Read signal strength */ 78 CMD_START_TUNER = 0x1b, /* ??? */ 79 80 CMD_FWVERSION = 0x35, 81 82 CMD_BER_CTRL = 0x3c, /* cmd.len = 0x03; */ 83 }; 84 85 #define CX24120_MAX_CMD_LEN 30 86 87 /* pilot mask */ 88 #define CX24120_PILOT_OFF 0x00 89 #define CX24120_PILOT_ON 0x40 90 #define CX24120_PILOT_AUTO 0x80 91 92 /* signal status */ 93 #define CX24120_HAS_SIGNAL 0x01 94 #define CX24120_HAS_CARRIER 0x02 95 #define CX24120_HAS_VITERBI 0x04 96 #define CX24120_HAS_LOCK 0x08 97 #define CX24120_HAS_UNK1 0x10 98 #define CX24120_HAS_UNK2 0x20 99 #define CX24120_STATUS_MASK 0x0f 100 #define CX24120_SIGNAL_MASK 0xc0 101 102 /* ber window */ 103 #define CX24120_BER_WINDOW 16 104 #define CX24120_BER_WSIZE ((1 << CX24120_BER_WINDOW) * 208 * 8) 105 106 #define info(args...) pr_info("cx24120: " args) 107 #define err(args...) pr_err("cx24120: ### ERROR: " args) 108 109 /* The Demod/Tuner can't easily provide these, we cache them */ 110 struct cx24120_tuning { 111 u32 frequency; 112 u32 symbol_rate; 113 enum fe_spectral_inversion inversion; 114 enum fe_code_rate fec; 115 116 enum fe_delivery_system delsys; 117 enum fe_modulation modulation; 118 enum fe_pilot pilot; 119 120 /* Demod values */ 121 u8 fec_val; 122 u8 fec_mask; 123 u8 clkdiv; 124 u8 ratediv; 125 u8 inversion_val; 126 u8 pilot_val; 127 }; 128 129 /* Private state */ 130 struct cx24120_state { 131 struct i2c_adapter *i2c; 132 const struct cx24120_config *config; 133 struct dvb_frontend frontend; 134 135 u8 cold_init; 136 u8 mpeg_enabled; 137 u8 need_clock_set; 138 139 /* current and next tuning parameters */ 140 struct cx24120_tuning dcur; 141 struct cx24120_tuning dnxt; 142 143 enum fe_status fe_status; 144 145 /* dvbv5 stats calculations */ 146 u32 bitrate; 147 u32 berw_usecs; 148 u32 ber_prev; 149 u32 ucb_offset; 150 unsigned long ber_jiffies_stats; 151 unsigned long per_jiffies_stats; 152 }; 153 154 /* Command message to firmware */ 155 struct cx24120_cmd { 156 u8 id; 157 u8 len; 158 u8 arg[CX24120_MAX_CMD_LEN]; 159 }; 160 161 /* Read single register */ cx24120_readreg(struct cx24120_state * state,u8 reg)162 static int cx24120_readreg(struct cx24120_state *state, u8 reg) 163 { 164 int ret; 165 u8 buf = 0; 166 struct i2c_msg msg[] = { 167 { 168 .addr = state->config->i2c_addr, 169 .flags = 0, 170 .len = 1, 171 .buf = ® 172 }, { 173 .addr = state->config->i2c_addr, 174 .flags = I2C_M_RD, 175 .len = 1, 176 .buf = &buf 177 } 178 }; 179 180 ret = i2c_transfer(state->i2c, msg, 2); 181 if (ret != 2) { 182 err("Read error: reg=0x%02x, ret=%i)\n", reg, ret); 183 return ret; 184 } 185 186 dev_dbg(&state->i2c->dev, "reg=0x%02x; data=0x%02x\n", reg, buf); 187 188 return buf; 189 } 190 191 /* Write single register */ cx24120_writereg(struct cx24120_state * state,u8 reg,u8 data)192 static int cx24120_writereg(struct cx24120_state *state, u8 reg, u8 data) 193 { 194 u8 buf[] = { reg, data }; 195 struct i2c_msg msg = { 196 .addr = state->config->i2c_addr, 197 .flags = 0, 198 .buf = buf, 199 .len = 2 200 }; 201 int ret; 202 203 ret = i2c_transfer(state->i2c, &msg, 1); 204 if (ret != 1) { 205 err("Write error: i2c_write error(err == %i, 0x%02x: 0x%02x)\n", 206 ret, reg, data); 207 return ret; 208 } 209 210 dev_dbg(&state->i2c->dev, "reg=0x%02x; data=0x%02x\n", reg, data); 211 212 return 0; 213 } 214 215 /* Write multiple registers in chunks of i2c_wr_max-sized buffers */ cx24120_writeregs(struct cx24120_state * state,u8 reg,const u8 * values,u16 len,u8 incr)216 static int cx24120_writeregs(struct cx24120_state *state, 217 u8 reg, const u8 *values, u16 len, u8 incr) 218 { 219 int ret; 220 u16 max = state->config->i2c_wr_max > 0 ? 221 state->config->i2c_wr_max : 222 len; 223 224 struct i2c_msg msg = { 225 .addr = state->config->i2c_addr, 226 .flags = 0, 227 }; 228 229 msg.buf = kmalloc(max + 1, GFP_KERNEL); 230 if (!msg.buf) 231 return -ENOMEM; 232 233 while (len) { 234 msg.buf[0] = reg; 235 msg.len = len > max ? max : len; 236 memcpy(&msg.buf[1], values, msg.len); 237 238 len -= msg.len; /* data length revers counter */ 239 values += msg.len; /* incr data pointer */ 240 241 if (incr) 242 reg += msg.len; 243 msg.len++; /* don't forget the addr byte */ 244 245 ret = i2c_transfer(state->i2c, &msg, 1); 246 if (ret != 1) { 247 err("i2c_write error(err == %i, 0x%02x)\n", ret, reg); 248 goto out; 249 } 250 251 dev_dbg(&state->i2c->dev, "reg=0x%02x; data=%*ph\n", 252 reg, msg.len - 1, msg.buf + 1); 253 } 254 255 ret = 0; 256 257 out: 258 kfree(msg.buf); 259 return ret; 260 } 261 262 static const struct dvb_frontend_ops cx24120_ops; 263 cx24120_attach(const struct cx24120_config * config,struct i2c_adapter * i2c)264 struct dvb_frontend *cx24120_attach(const struct cx24120_config *config, 265 struct i2c_adapter *i2c) 266 { 267 struct cx24120_state *state; 268 int demod_rev; 269 270 info("Conexant cx24120/cx24118 - DVBS/S2 Satellite demod/tuner\n"); 271 state = kzalloc(sizeof(*state), GFP_KERNEL); 272 if (!state) { 273 err("Unable to allocate memory for cx24120_state\n"); 274 goto error; 275 } 276 277 /* setup the state */ 278 state->config = config; 279 state->i2c = i2c; 280 281 /* check if the demod is present and has proper type */ 282 demod_rev = cx24120_readreg(state, CX24120_REG_REVISION); 283 switch (demod_rev) { 284 case 0x07: 285 info("Demod cx24120 rev. 0x07 detected.\n"); 286 break; 287 case 0x05: 288 info("Demod cx24120 rev. 0x05 detected.\n"); 289 break; 290 default: 291 err("Unsupported demod revision: 0x%x detected.\n", demod_rev); 292 goto error; 293 } 294 295 /* create dvb_frontend */ 296 state->cold_init = 0; 297 memcpy(&state->frontend.ops, &cx24120_ops, 298 sizeof(struct dvb_frontend_ops)); 299 state->frontend.demodulator_priv = state; 300 301 info("Conexant cx24120/cx24118 attached.\n"); 302 return &state->frontend; 303 304 error: 305 kfree(state); 306 return NULL; 307 } 308 EXPORT_SYMBOL(cx24120_attach); 309 cx24120_test_rom(struct cx24120_state * state)310 static int cx24120_test_rom(struct cx24120_state *state) 311 { 312 int err, ret; 313 314 err = cx24120_readreg(state, 0xfd); 315 if (err & 4) { 316 ret = cx24120_readreg(state, 0xdf) & 0xfe; 317 err = cx24120_writereg(state, 0xdf, ret); 318 } 319 return err; 320 } 321 cx24120_read_snr(struct dvb_frontend * fe,u16 * snr)322 static int cx24120_read_snr(struct dvb_frontend *fe, u16 *snr) 323 { 324 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 325 326 if (c->cnr.stat[0].scale != FE_SCALE_DECIBEL) 327 *snr = 0; 328 else 329 *snr = div_s64(c->cnr.stat[0].svalue, 100); 330 331 return 0; 332 } 333 cx24120_read_ber(struct dvb_frontend * fe,u32 * ber)334 static int cx24120_read_ber(struct dvb_frontend *fe, u32 *ber) 335 { 336 struct cx24120_state *state = fe->demodulator_priv; 337 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 338 339 if (c->post_bit_error.stat[0].scale != FE_SCALE_COUNTER) { 340 *ber = 0; 341 return 0; 342 } 343 344 *ber = c->post_bit_error.stat[0].uvalue - state->ber_prev; 345 state->ber_prev = c->post_bit_error.stat[0].uvalue; 346 347 return 0; 348 } 349 350 static int cx24120_msg_mpeg_output_global_config(struct cx24120_state *state, 351 u8 flag); 352 353 /* Check if we're running a command that needs to disable mpeg out */ cx24120_check_cmd(struct cx24120_state * state,u8 id)354 static void cx24120_check_cmd(struct cx24120_state *state, u8 id) 355 { 356 switch (id) { 357 case CMD_TUNEREQUEST: 358 case CMD_CLOCK_READ: 359 case CMD_DISEQC_MSG1: 360 case CMD_DISEQC_MSG2: 361 case CMD_SETVOLTAGE: 362 case CMD_SETTONE: 363 case CMD_DISEQC_BURST: 364 cx24120_msg_mpeg_output_global_config(state, 0); 365 /* Old driver would do a msleep(100) here */ 366 return; 367 default: 368 return; 369 } 370 } 371 372 /* Send a message to the firmware */ cx24120_message_send(struct cx24120_state * state,struct cx24120_cmd * cmd)373 static int cx24120_message_send(struct cx24120_state *state, 374 struct cx24120_cmd *cmd) 375 { 376 int ficus; 377 378 if (state->mpeg_enabled) { 379 /* Disable mpeg out on certain commands */ 380 cx24120_check_cmd(state, cmd->id); 381 } 382 383 cx24120_writereg(state, CX24120_REG_CMD_START, cmd->id); 384 cx24120_writeregs(state, CX24120_REG_CMD_ARGS, &cmd->arg[0], 385 cmd->len, 1); 386 cx24120_writereg(state, CX24120_REG_CMD_END, 0x01); 387 388 ficus = 1000; 389 while (cx24120_readreg(state, CX24120_REG_CMD_END)) { 390 msleep(20); 391 ficus -= 20; 392 if (ficus == 0) { 393 err("Error sending message to firmware\n"); 394 return -EREMOTEIO; 395 } 396 } 397 dev_dbg(&state->i2c->dev, "sent message 0x%02x\n", cmd->id); 398 399 return 0; 400 } 401 402 /* Send a message and fill arg[] with the results */ cx24120_message_sendrcv(struct cx24120_state * state,struct cx24120_cmd * cmd,u8 numreg)403 static int cx24120_message_sendrcv(struct cx24120_state *state, 404 struct cx24120_cmd *cmd, u8 numreg) 405 { 406 int ret, i; 407 408 if (numreg > CX24120_MAX_CMD_LEN) { 409 err("Too many registers to read. cmd->reg = %d", numreg); 410 return -EREMOTEIO; 411 } 412 413 ret = cx24120_message_send(state, cmd); 414 if (ret != 0) 415 return ret; 416 417 if (!numreg) 418 return 0; 419 420 /* Read numreg registers starting from register cmd->len */ 421 for (i = 0; i < numreg; i++) 422 cmd->arg[i] = cx24120_readreg(state, (cmd->len + i + 1)); 423 424 return 0; 425 } 426 cx24120_read_signal_strength(struct dvb_frontend * fe,u16 * signal_strength)427 static int cx24120_read_signal_strength(struct dvb_frontend *fe, 428 u16 *signal_strength) 429 { 430 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 431 432 if (c->strength.stat[0].scale != FE_SCALE_RELATIVE) 433 *signal_strength = 0; 434 else 435 *signal_strength = c->strength.stat[0].uvalue; 436 437 return 0; 438 } 439 cx24120_msg_mpeg_output_global_config(struct cx24120_state * state,u8 enable)440 static int cx24120_msg_mpeg_output_global_config(struct cx24120_state *state, 441 u8 enable) 442 { 443 struct cx24120_cmd cmd; 444 int ret; 445 446 cmd.id = CMD_MPEG_ONOFF; 447 cmd.len = 4; 448 cmd.arg[0] = 0x01; 449 cmd.arg[1] = 0x00; 450 cmd.arg[2] = enable ? 0 : (u8)(-1); 451 cmd.arg[3] = 0x01; 452 453 ret = cx24120_message_send(state, &cmd); 454 if (ret != 0) { 455 dev_dbg(&state->i2c->dev, "failed to %s MPEG output\n", 456 enable ? "enable" : "disable"); 457 return ret; 458 } 459 460 state->mpeg_enabled = enable; 461 dev_dbg(&state->i2c->dev, "MPEG output %s\n", 462 enable ? "enabled" : "disabled"); 463 464 return 0; 465 } 466 cx24120_msg_mpeg_output_config(struct cx24120_state * state,u8 seq)467 static int cx24120_msg_mpeg_output_config(struct cx24120_state *state, u8 seq) 468 { 469 struct cx24120_cmd cmd; 470 struct cx24120_initial_mpeg_config i = 471 state->config->initial_mpeg_config; 472 473 cmd.id = CMD_MPEG_INIT; 474 cmd.len = 7; 475 cmd.arg[0] = seq; /* sequental number - can be 0,1,2 */ 476 cmd.arg[1] = ((i.x1 & 0x01) << 1) | ((i.x1 >> 1) & 0x01); 477 cmd.arg[2] = 0x05; 478 cmd.arg[3] = 0x02; 479 cmd.arg[4] = ((i.x2 >> 1) & 0x01); 480 cmd.arg[5] = (i.x2 & 0xf0) | (i.x3 & 0x0f); 481 cmd.arg[6] = 0x10; 482 483 return cx24120_message_send(state, &cmd); 484 } 485 cx24120_diseqc_send_burst(struct dvb_frontend * fe,enum fe_sec_mini_cmd burst)486 static int cx24120_diseqc_send_burst(struct dvb_frontend *fe, 487 enum fe_sec_mini_cmd burst) 488 { 489 struct cx24120_state *state = fe->demodulator_priv; 490 struct cx24120_cmd cmd; 491 492 dev_dbg(&state->i2c->dev, "\n"); 493 494 /* 495 * Yes, cmd.len is set to zero. The old driver 496 * didn't specify any len, but also had a 497 * memset 0 before every use of the cmd struct 498 * which would have set it to zero. 499 * This quite probably needs looking into. 500 */ 501 cmd.id = CMD_DISEQC_BURST; 502 cmd.len = 0; 503 cmd.arg[0] = 0x00; 504 cmd.arg[1] = (burst == SEC_MINI_B) ? 0x01 : 0x00; 505 506 return cx24120_message_send(state, &cmd); 507 } 508 cx24120_set_tone(struct dvb_frontend * fe,enum fe_sec_tone_mode tone)509 static int cx24120_set_tone(struct dvb_frontend *fe, enum fe_sec_tone_mode tone) 510 { 511 struct cx24120_state *state = fe->demodulator_priv; 512 struct cx24120_cmd cmd; 513 514 dev_dbg(&state->i2c->dev, "(%d)\n", tone); 515 516 if ((tone != SEC_TONE_ON) && (tone != SEC_TONE_OFF)) { 517 err("Invalid tone=%d\n", tone); 518 return -EINVAL; 519 } 520 521 cmd.id = CMD_SETTONE; 522 cmd.len = 4; 523 cmd.arg[0] = 0x00; 524 cmd.arg[1] = 0x00; 525 cmd.arg[2] = 0x00; 526 cmd.arg[3] = (tone == SEC_TONE_ON) ? 0x01 : 0x00; 527 528 return cx24120_message_send(state, &cmd); 529 } 530 cx24120_set_voltage(struct dvb_frontend * fe,enum fe_sec_voltage voltage)531 static int cx24120_set_voltage(struct dvb_frontend *fe, 532 enum fe_sec_voltage voltage) 533 { 534 struct cx24120_state *state = fe->demodulator_priv; 535 struct cx24120_cmd cmd; 536 537 dev_dbg(&state->i2c->dev, "(%d)\n", voltage); 538 539 cmd.id = CMD_SETVOLTAGE; 540 cmd.len = 2; 541 cmd.arg[0] = 0x00; 542 cmd.arg[1] = (voltage == SEC_VOLTAGE_18) ? 0x01 : 0x00; 543 544 return cx24120_message_send(state, &cmd); 545 } 546 cx24120_send_diseqc_msg(struct dvb_frontend * fe,struct dvb_diseqc_master_cmd * d)547 static int cx24120_send_diseqc_msg(struct dvb_frontend *fe, 548 struct dvb_diseqc_master_cmd *d) 549 { 550 struct cx24120_state *state = fe->demodulator_priv; 551 struct cx24120_cmd cmd; 552 int back_count; 553 554 dev_dbg(&state->i2c->dev, "\n"); 555 556 cmd.id = CMD_DISEQC_MSG1; 557 cmd.len = 11; 558 cmd.arg[0] = 0x00; 559 cmd.arg[1] = 0x00; 560 cmd.arg[2] = 0x03; 561 cmd.arg[3] = 0x16; 562 cmd.arg[4] = 0x28; 563 cmd.arg[5] = 0x01; 564 cmd.arg[6] = 0x01; 565 cmd.arg[7] = 0x14; 566 cmd.arg[8] = 0x19; 567 cmd.arg[9] = 0x14; 568 cmd.arg[10] = 0x1e; 569 570 if (cx24120_message_send(state, &cmd)) { 571 err("send 1st message(0x%x) failed\n", cmd.id); 572 return -EREMOTEIO; 573 } 574 575 cmd.id = CMD_DISEQC_MSG2; 576 cmd.len = d->msg_len + 6; 577 cmd.arg[0] = 0x00; 578 cmd.arg[1] = 0x01; 579 cmd.arg[2] = 0x02; 580 cmd.arg[3] = 0x00; 581 cmd.arg[4] = 0x00; 582 cmd.arg[5] = d->msg_len; 583 584 memcpy(&cmd.arg[6], &d->msg, d->msg_len); 585 586 if (cx24120_message_send(state, &cmd)) { 587 err("send 2nd message(0x%x) failed\n", cmd.id); 588 return -EREMOTEIO; 589 } 590 591 back_count = 500; 592 do { 593 if (!(cx24120_readreg(state, 0x93) & 0x01)) { 594 dev_dbg(&state->i2c->dev, "diseqc sequence sent\n"); 595 return 0; 596 } 597 msleep(20); 598 back_count -= 20; 599 } while (back_count); 600 601 err("Too long waiting for diseqc.\n"); 602 return -ETIMEDOUT; 603 } 604 cx24120_get_stats(struct cx24120_state * state)605 static void cx24120_get_stats(struct cx24120_state *state) 606 { 607 struct dvb_frontend *fe = &state->frontend; 608 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 609 struct cx24120_cmd cmd; 610 int ret, cnr, msecs; 611 u16 sig, ucb; 612 u32 ber; 613 614 dev_dbg(&state->i2c->dev, "\n"); 615 616 /* signal strength */ 617 if (state->fe_status & FE_HAS_SIGNAL) { 618 cmd.id = CMD_READ_SNR; 619 cmd.len = 1; 620 cmd.arg[0] = 0x00; 621 622 ret = cx24120_message_send(state, &cmd); 623 if (ret != 0) { 624 err("error reading signal strength\n"); 625 return; 626 } 627 628 /* raw */ 629 sig = cx24120_readreg(state, CX24120_REG_SIGSTR_H) >> 6; 630 sig = sig << 8; 631 sig |= cx24120_readreg(state, CX24120_REG_SIGSTR_L); 632 dev_dbg(&state->i2c->dev, 633 "signal strength from firmware = 0x%x\n", sig); 634 635 /* cooked */ 636 sig = -100 * sig + 94324; 637 638 c->strength.stat[0].scale = FE_SCALE_RELATIVE; 639 c->strength.stat[0].uvalue = sig; 640 } else { 641 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; 642 } 643 644 /* CNR */ 645 if (state->fe_status & FE_HAS_VITERBI) { 646 cnr = cx24120_readreg(state, CX24120_REG_QUALITY_H) << 8; 647 cnr |= cx24120_readreg(state, CX24120_REG_QUALITY_L); 648 dev_dbg(&state->i2c->dev, "read SNR index = %d\n", cnr); 649 650 /* guessed - seems about right */ 651 cnr = cnr * 100; 652 653 c->cnr.stat[0].scale = FE_SCALE_DECIBEL; 654 c->cnr.stat[0].svalue = cnr; 655 } else { 656 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; 657 } 658 659 /* BER & UCB require lock */ 660 if (!(state->fe_status & FE_HAS_LOCK)) { 661 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE; 662 c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE; 663 c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE; 664 c->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE; 665 return; 666 } 667 668 /* BER */ 669 if (time_after(jiffies, state->ber_jiffies_stats)) { 670 msecs = (state->berw_usecs + 500) / 1000; 671 state->ber_jiffies_stats = jiffies + msecs_to_jiffies(msecs); 672 673 ber = cx24120_readreg(state, CX24120_REG_BER_HH) << 24; 674 ber |= cx24120_readreg(state, CX24120_REG_BER_HL) << 16; 675 ber |= cx24120_readreg(state, CX24120_REG_BER_LH) << 8; 676 ber |= cx24120_readreg(state, CX24120_REG_BER_LL); 677 dev_dbg(&state->i2c->dev, "read BER index = %d\n", ber); 678 679 c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER; 680 c->post_bit_error.stat[0].uvalue += ber; 681 682 c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER; 683 c->post_bit_count.stat[0].uvalue += CX24120_BER_WSIZE; 684 } 685 686 /* UCB */ 687 if (time_after(jiffies, state->per_jiffies_stats)) { 688 state->per_jiffies_stats = jiffies + msecs_to_jiffies(1000); 689 690 ucb = cx24120_readreg(state, CX24120_REG_UCB_H) << 8; 691 ucb |= cx24120_readreg(state, CX24120_REG_UCB_L); 692 dev_dbg(&state->i2c->dev, "ucblocks = %d\n", ucb); 693 694 /* handle reset */ 695 if (ucb < state->ucb_offset) 696 state->ucb_offset = c->block_error.stat[0].uvalue; 697 698 c->block_error.stat[0].scale = FE_SCALE_COUNTER; 699 c->block_error.stat[0].uvalue = ucb + state->ucb_offset; 700 701 c->block_count.stat[0].scale = FE_SCALE_COUNTER; 702 c->block_count.stat[0].uvalue += state->bitrate / 8 / 208; 703 } 704 } 705 706 static void cx24120_set_clock_ratios(struct dvb_frontend *fe); 707 708 /* Read current tuning status */ cx24120_read_status(struct dvb_frontend * fe,enum fe_status * status)709 static int cx24120_read_status(struct dvb_frontend *fe, enum fe_status *status) 710 { 711 struct cx24120_state *state = fe->demodulator_priv; 712 int lock; 713 714 lock = cx24120_readreg(state, CX24120_REG_STATUS); 715 716 dev_dbg(&state->i2c->dev, "status = 0x%02x\n", lock); 717 718 *status = 0; 719 720 if (lock & CX24120_HAS_SIGNAL) 721 *status = FE_HAS_SIGNAL; 722 if (lock & CX24120_HAS_CARRIER) 723 *status |= FE_HAS_CARRIER; 724 if (lock & CX24120_HAS_VITERBI) 725 *status |= FE_HAS_VITERBI | FE_HAS_SYNC; 726 if (lock & CX24120_HAS_LOCK) 727 *status |= FE_HAS_LOCK; 728 729 /* 730 * TODO: is FE_HAS_SYNC in the right place? 731 * Other cx241xx drivers have this slightly 732 * different 733 */ 734 735 state->fe_status = *status; 736 cx24120_get_stats(state); 737 738 /* Set the clock once tuned in */ 739 if (state->need_clock_set && *status & FE_HAS_LOCK) { 740 /* Set clock ratios */ 741 cx24120_set_clock_ratios(fe); 742 743 /* Old driver would do a msleep(200) here */ 744 745 /* Renable mpeg output */ 746 if (!state->mpeg_enabled) 747 cx24120_msg_mpeg_output_global_config(state, 1); 748 749 state->need_clock_set = 0; 750 } 751 752 return 0; 753 } 754 755 /* 756 * FEC & modulation lookup table 757 * Used for decoding the REG_FECMODE register 758 * once tuned in. 759 */ 760 struct cx24120_modfec { 761 enum fe_delivery_system delsys; 762 enum fe_modulation mod; 763 enum fe_code_rate fec; 764 u8 val; 765 }; 766 767 static const struct cx24120_modfec modfec_lookup_table[] = { 768 /*delsys mod fec val */ 769 { SYS_DVBS, QPSK, FEC_1_2, 0x01 }, 770 { SYS_DVBS, QPSK, FEC_2_3, 0x02 }, 771 { SYS_DVBS, QPSK, FEC_3_4, 0x03 }, 772 { SYS_DVBS, QPSK, FEC_4_5, 0x04 }, 773 { SYS_DVBS, QPSK, FEC_5_6, 0x05 }, 774 { SYS_DVBS, QPSK, FEC_6_7, 0x06 }, 775 { SYS_DVBS, QPSK, FEC_7_8, 0x07 }, 776 777 { SYS_DVBS2, QPSK, FEC_1_2, 0x04 }, 778 { SYS_DVBS2, QPSK, FEC_3_5, 0x05 }, 779 { SYS_DVBS2, QPSK, FEC_2_3, 0x06 }, 780 { SYS_DVBS2, QPSK, FEC_3_4, 0x07 }, 781 { SYS_DVBS2, QPSK, FEC_4_5, 0x08 }, 782 { SYS_DVBS2, QPSK, FEC_5_6, 0x09 }, 783 { SYS_DVBS2, QPSK, FEC_8_9, 0x0a }, 784 { SYS_DVBS2, QPSK, FEC_9_10, 0x0b }, 785 786 { SYS_DVBS2, PSK_8, FEC_3_5, 0x0c }, 787 { SYS_DVBS2, PSK_8, FEC_2_3, 0x0d }, 788 { SYS_DVBS2, PSK_8, FEC_3_4, 0x0e }, 789 { SYS_DVBS2, PSK_8, FEC_5_6, 0x0f }, 790 { SYS_DVBS2, PSK_8, FEC_8_9, 0x10 }, 791 { SYS_DVBS2, PSK_8, FEC_9_10, 0x11 }, 792 }; 793 794 /* Retrieve current fec, modulation & pilot values */ cx24120_get_fec(struct dvb_frontend * fe)795 static int cx24120_get_fec(struct dvb_frontend *fe) 796 { 797 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 798 struct cx24120_state *state = fe->demodulator_priv; 799 int idx; 800 int ret; 801 int fec; 802 803 ret = cx24120_readreg(state, CX24120_REG_FECMODE); 804 fec = ret & 0x3f; /* Lower 6 bits */ 805 806 dev_dbg(&state->i2c->dev, "raw fec = %d\n", fec); 807 808 for (idx = 0; idx < ARRAY_SIZE(modfec_lookup_table); idx++) { 809 if (modfec_lookup_table[idx].delsys != state->dcur.delsys) 810 continue; 811 if (modfec_lookup_table[idx].val != fec) 812 continue; 813 814 break; /* found */ 815 } 816 817 if (idx >= ARRAY_SIZE(modfec_lookup_table)) { 818 dev_dbg(&state->i2c->dev, "couldn't find fec!\n"); 819 return -EINVAL; 820 } 821 822 /* save values back to cache */ 823 c->modulation = modfec_lookup_table[idx].mod; 824 c->fec_inner = modfec_lookup_table[idx].fec; 825 c->pilot = (ret & 0x80) ? PILOT_ON : PILOT_OFF; 826 827 dev_dbg(&state->i2c->dev, "mod(%d), fec(%d), pilot(%d)\n", 828 c->modulation, c->fec_inner, c->pilot); 829 830 return 0; 831 } 832 833 /* Calculate ber window time */ cx24120_calculate_ber_window(struct cx24120_state * state,u32 rate)834 static void cx24120_calculate_ber_window(struct cx24120_state *state, u32 rate) 835 { 836 struct dvb_frontend *fe = &state->frontend; 837 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 838 u64 tmp; 839 840 /* 841 * Calculate bitrate from rate in the clock ratios table. 842 * This isn't *exactly* right but close enough. 843 */ 844 tmp = (u64)c->symbol_rate * rate; 845 do_div(tmp, 256); 846 state->bitrate = tmp; 847 848 /* usecs per ber window */ 849 tmp = 1000000ULL * CX24120_BER_WSIZE; 850 do_div(tmp, state->bitrate); 851 state->berw_usecs = tmp; 852 853 dev_dbg(&state->i2c->dev, "bitrate: %u, berw_usecs: %u\n", 854 state->bitrate, state->berw_usecs); 855 } 856 857 /* 858 * Clock ratios lookup table 859 * 860 * Values obtained from much larger table in old driver 861 * which had numerous entries which would never match. 862 * 863 * There's probably some way of calculating these but I 864 * can't determine the pattern 865 */ 866 struct cx24120_clock_ratios_table { 867 enum fe_delivery_system delsys; 868 enum fe_pilot pilot; 869 enum fe_modulation mod; 870 enum fe_code_rate fec; 871 u32 m_rat; 872 u32 n_rat; 873 u32 rate; 874 }; 875 876 static const struct cx24120_clock_ratios_table clock_ratios_table[] = { 877 /*delsys pilot mod fec m_rat n_rat rate */ 878 { SYS_DVBS2, PILOT_OFF, QPSK, FEC_1_2, 273088, 254505, 274 }, 879 { SYS_DVBS2, PILOT_OFF, QPSK, FEC_3_5, 17272, 13395, 330 }, 880 { SYS_DVBS2, PILOT_OFF, QPSK, FEC_2_3, 24344, 16967, 367 }, 881 { SYS_DVBS2, PILOT_OFF, QPSK, FEC_3_4, 410788, 254505, 413 }, 882 { SYS_DVBS2, PILOT_OFF, QPSK, FEC_4_5, 438328, 254505, 440 }, 883 { SYS_DVBS2, PILOT_OFF, QPSK, FEC_5_6, 30464, 16967, 459 }, 884 { SYS_DVBS2, PILOT_OFF, QPSK, FEC_8_9, 487832, 254505, 490 }, 885 { SYS_DVBS2, PILOT_OFF, QPSK, FEC_9_10, 493952, 254505, 496 }, 886 { SYS_DVBS2, PILOT_OFF, PSK_8, FEC_3_5, 328168, 169905, 494 }, 887 { SYS_DVBS2, PILOT_OFF, PSK_8, FEC_2_3, 24344, 11327, 550 }, 888 { SYS_DVBS2, PILOT_OFF, PSK_8, FEC_3_4, 410788, 169905, 618 }, 889 { SYS_DVBS2, PILOT_OFF, PSK_8, FEC_5_6, 30464, 11327, 688 }, 890 { SYS_DVBS2, PILOT_OFF, PSK_8, FEC_8_9, 487832, 169905, 735 }, 891 { SYS_DVBS2, PILOT_OFF, PSK_8, FEC_9_10, 493952, 169905, 744 }, 892 { SYS_DVBS2, PILOT_ON, QPSK, FEC_1_2, 273088, 260709, 268 }, 893 { SYS_DVBS2, PILOT_ON, QPSK, FEC_3_5, 328168, 260709, 322 }, 894 { SYS_DVBS2, PILOT_ON, QPSK, FEC_2_3, 121720, 86903, 358 }, 895 { SYS_DVBS2, PILOT_ON, QPSK, FEC_3_4, 410788, 260709, 403 }, 896 { SYS_DVBS2, PILOT_ON, QPSK, FEC_4_5, 438328, 260709, 430 }, 897 { SYS_DVBS2, PILOT_ON, QPSK, FEC_5_6, 152320, 86903, 448 }, 898 { SYS_DVBS2, PILOT_ON, QPSK, FEC_8_9, 487832, 260709, 479 }, 899 { SYS_DVBS2, PILOT_ON, QPSK, FEC_9_10, 493952, 260709, 485 }, 900 { SYS_DVBS2, PILOT_ON, PSK_8, FEC_3_5, 328168, 173853, 483 }, 901 { SYS_DVBS2, PILOT_ON, PSK_8, FEC_2_3, 121720, 57951, 537 }, 902 { SYS_DVBS2, PILOT_ON, PSK_8, FEC_3_4, 410788, 173853, 604 }, 903 { SYS_DVBS2, PILOT_ON, PSK_8, FEC_5_6, 152320, 57951, 672 }, 904 { SYS_DVBS2, PILOT_ON, PSK_8, FEC_8_9, 487832, 173853, 718 }, 905 { SYS_DVBS2, PILOT_ON, PSK_8, FEC_9_10, 493952, 173853, 727 }, 906 { SYS_DVBS, PILOT_OFF, QPSK, FEC_1_2, 152592, 152592, 256 }, 907 { SYS_DVBS, PILOT_OFF, QPSK, FEC_2_3, 305184, 228888, 341 }, 908 { SYS_DVBS, PILOT_OFF, QPSK, FEC_3_4, 457776, 305184, 384 }, 909 { SYS_DVBS, PILOT_OFF, QPSK, FEC_5_6, 762960, 457776, 427 }, 910 { SYS_DVBS, PILOT_OFF, QPSK, FEC_7_8, 1068144, 610368, 448 }, 911 }; 912 913 /* Set clock ratio from lookup table */ cx24120_set_clock_ratios(struct dvb_frontend * fe)914 static void cx24120_set_clock_ratios(struct dvb_frontend *fe) 915 { 916 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 917 struct cx24120_state *state = fe->demodulator_priv; 918 struct cx24120_cmd cmd; 919 int ret, idx; 920 921 /* Find fec, modulation, pilot */ 922 ret = cx24120_get_fec(fe); 923 if (ret != 0) 924 return; 925 926 /* Find the clock ratios in the lookup table */ 927 for (idx = 0; idx < ARRAY_SIZE(clock_ratios_table); idx++) { 928 if (clock_ratios_table[idx].delsys != state->dcur.delsys) 929 continue; 930 if (clock_ratios_table[idx].mod != c->modulation) 931 continue; 932 if (clock_ratios_table[idx].fec != c->fec_inner) 933 continue; 934 if (clock_ratios_table[idx].pilot != c->pilot) 935 continue; 936 937 break; /* found */ 938 } 939 940 if (idx >= ARRAY_SIZE(clock_ratios_table)) { 941 info("Clock ratio not found - data reception in danger\n"); 942 return; 943 } 944 945 /* Read current values? */ 946 cmd.id = CMD_CLOCK_READ; 947 cmd.len = 1; 948 cmd.arg[0] = 0x00; 949 ret = cx24120_message_sendrcv(state, &cmd, 6); 950 if (ret != 0) 951 return; 952 /* in cmd[0]-[5] - result */ 953 954 dev_dbg(&state->i2c->dev, "m=%d, n=%d; idx: %d m=%d, n=%d, rate=%d\n", 955 cmd.arg[2] | (cmd.arg[1] << 8) | (cmd.arg[0] << 16), 956 cmd.arg[5] | (cmd.arg[4] << 8) | (cmd.arg[3] << 16), 957 idx, 958 clock_ratios_table[idx].m_rat, 959 clock_ratios_table[idx].n_rat, 960 clock_ratios_table[idx].rate); 961 962 /* Set the clock */ 963 cmd.id = CMD_CLOCK_SET; 964 cmd.len = 10; 965 cmd.arg[0] = 0; 966 cmd.arg[1] = 0x10; 967 cmd.arg[2] = (clock_ratios_table[idx].m_rat >> 16) & 0xff; 968 cmd.arg[3] = (clock_ratios_table[idx].m_rat >> 8) & 0xff; 969 cmd.arg[4] = (clock_ratios_table[idx].m_rat >> 0) & 0xff; 970 cmd.arg[5] = (clock_ratios_table[idx].n_rat >> 16) & 0xff; 971 cmd.arg[6] = (clock_ratios_table[idx].n_rat >> 8) & 0xff; 972 cmd.arg[7] = (clock_ratios_table[idx].n_rat >> 0) & 0xff; 973 cmd.arg[8] = (clock_ratios_table[idx].rate >> 8) & 0xff; 974 cmd.arg[9] = (clock_ratios_table[idx].rate >> 0) & 0xff; 975 976 cx24120_message_send(state, &cmd); 977 978 /* Calculate ber window rates for stat work */ 979 cx24120_calculate_ber_window(state, clock_ratios_table[idx].rate); 980 } 981 982 /* Set inversion value */ cx24120_set_inversion(struct cx24120_state * state,enum fe_spectral_inversion inversion)983 static int cx24120_set_inversion(struct cx24120_state *state, 984 enum fe_spectral_inversion inversion) 985 { 986 dev_dbg(&state->i2c->dev, "(%d)\n", inversion); 987 988 switch (inversion) { 989 case INVERSION_OFF: 990 state->dnxt.inversion_val = 0x00; 991 break; 992 case INVERSION_ON: 993 state->dnxt.inversion_val = 0x04; 994 break; 995 case INVERSION_AUTO: 996 state->dnxt.inversion_val = 0x0c; 997 break; 998 default: 999 return -EINVAL; 1000 } 1001 1002 state->dnxt.inversion = inversion; 1003 1004 return 0; 1005 } 1006 1007 /* FEC lookup table for tuning */ 1008 struct cx24120_modfec_table { 1009 enum fe_delivery_system delsys; 1010 enum fe_modulation mod; 1011 enum fe_code_rate fec; 1012 u8 val; 1013 }; 1014 1015 static const struct cx24120_modfec_table modfec_table[] = { 1016 /*delsys mod fec val */ 1017 { SYS_DVBS, QPSK, FEC_1_2, 0x2e }, 1018 { SYS_DVBS, QPSK, FEC_2_3, 0x2f }, 1019 { SYS_DVBS, QPSK, FEC_3_4, 0x30 }, 1020 { SYS_DVBS, QPSK, FEC_5_6, 0x31 }, 1021 { SYS_DVBS, QPSK, FEC_6_7, 0x32 }, 1022 { SYS_DVBS, QPSK, FEC_7_8, 0x33 }, 1023 1024 { SYS_DVBS2, QPSK, FEC_1_2, 0x04 }, 1025 { SYS_DVBS2, QPSK, FEC_3_5, 0x05 }, 1026 { SYS_DVBS2, QPSK, FEC_2_3, 0x06 }, 1027 { SYS_DVBS2, QPSK, FEC_3_4, 0x07 }, 1028 { SYS_DVBS2, QPSK, FEC_4_5, 0x08 }, 1029 { SYS_DVBS2, QPSK, FEC_5_6, 0x09 }, 1030 { SYS_DVBS2, QPSK, FEC_8_9, 0x0a }, 1031 { SYS_DVBS2, QPSK, FEC_9_10, 0x0b }, 1032 1033 { SYS_DVBS2, PSK_8, FEC_3_5, 0x0c }, 1034 { SYS_DVBS2, PSK_8, FEC_2_3, 0x0d }, 1035 { SYS_DVBS2, PSK_8, FEC_3_4, 0x0e }, 1036 { SYS_DVBS2, PSK_8, FEC_5_6, 0x0f }, 1037 { SYS_DVBS2, PSK_8, FEC_8_9, 0x10 }, 1038 { SYS_DVBS2, PSK_8, FEC_9_10, 0x11 }, 1039 }; 1040 1041 /* Set fec_val & fec_mask values from delsys, modulation & fec */ cx24120_set_fec(struct cx24120_state * state,enum fe_modulation mod,enum fe_code_rate fec)1042 static int cx24120_set_fec(struct cx24120_state *state, enum fe_modulation mod, 1043 enum fe_code_rate fec) 1044 { 1045 int idx; 1046 1047 dev_dbg(&state->i2c->dev, "(0x%02x,0x%02x)\n", mod, fec); 1048 1049 state->dnxt.fec = fec; 1050 1051 /* Lookup fec_val from modfec table */ 1052 for (idx = 0; idx < ARRAY_SIZE(modfec_table); idx++) { 1053 if (modfec_table[idx].delsys != state->dnxt.delsys) 1054 continue; 1055 if (modfec_table[idx].mod != mod) 1056 continue; 1057 if (modfec_table[idx].fec != fec) 1058 continue; 1059 1060 /* found */ 1061 state->dnxt.fec_mask = 0x00; 1062 state->dnxt.fec_val = modfec_table[idx].val; 1063 return 0; 1064 } 1065 1066 if (state->dnxt.delsys == SYS_DVBS2) { 1067 /* DVBS2 auto is 0x00/0x00 */ 1068 state->dnxt.fec_mask = 0x00; 1069 state->dnxt.fec_val = 0x00; 1070 } else { 1071 /* Set DVB-S to auto */ 1072 state->dnxt.fec_val = 0x2e; 1073 state->dnxt.fec_mask = 0xac; 1074 } 1075 1076 return 0; 1077 } 1078 1079 /* Set pilot */ cx24120_set_pilot(struct cx24120_state * state,enum fe_pilot pilot)1080 static int cx24120_set_pilot(struct cx24120_state *state, enum fe_pilot pilot) 1081 { 1082 dev_dbg(&state->i2c->dev, "(%d)\n", pilot); 1083 1084 /* Pilot only valid in DVBS2 */ 1085 if (state->dnxt.delsys != SYS_DVBS2) { 1086 state->dnxt.pilot_val = CX24120_PILOT_OFF; 1087 return 0; 1088 } 1089 1090 switch (pilot) { 1091 case PILOT_OFF: 1092 state->dnxt.pilot_val = CX24120_PILOT_OFF; 1093 break; 1094 case PILOT_ON: 1095 state->dnxt.pilot_val = CX24120_PILOT_ON; 1096 break; 1097 case PILOT_AUTO: 1098 default: 1099 state->dnxt.pilot_val = CX24120_PILOT_AUTO; 1100 } 1101 1102 return 0; 1103 } 1104 1105 /* Set symbol rate */ cx24120_set_symbolrate(struct cx24120_state * state,u32 rate)1106 static int cx24120_set_symbolrate(struct cx24120_state *state, u32 rate) 1107 { 1108 dev_dbg(&state->i2c->dev, "(%d)\n", rate); 1109 1110 state->dnxt.symbol_rate = rate; 1111 1112 /* Check symbol rate */ 1113 if (rate > 31000000) { 1114 state->dnxt.clkdiv = (-(rate < 31000001) & 3) + 2; 1115 state->dnxt.ratediv = (-(rate < 31000001) & 6) + 4; 1116 } else { 1117 state->dnxt.clkdiv = 3; 1118 state->dnxt.ratediv = 6; 1119 } 1120 1121 return 0; 1122 } 1123 1124 /* Overwrite the current tuning params, we are about to tune */ cx24120_clone_params(struct dvb_frontend * fe)1125 static void cx24120_clone_params(struct dvb_frontend *fe) 1126 { 1127 struct cx24120_state *state = fe->demodulator_priv; 1128 1129 state->dcur = state->dnxt; 1130 } 1131 cx24120_set_frontend(struct dvb_frontend * fe)1132 static int cx24120_set_frontend(struct dvb_frontend *fe) 1133 { 1134 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1135 struct cx24120_state *state = fe->demodulator_priv; 1136 struct cx24120_cmd cmd; 1137 int ret; 1138 1139 switch (c->delivery_system) { 1140 case SYS_DVBS2: 1141 dev_dbg(&state->i2c->dev, "DVB-S2\n"); 1142 break; 1143 case SYS_DVBS: 1144 dev_dbg(&state->i2c->dev, "DVB-S\n"); 1145 break; 1146 default: 1147 dev_dbg(&state->i2c->dev, 1148 "delivery system(%d) not supported\n", 1149 c->delivery_system); 1150 return -EINVAL; 1151 } 1152 1153 state->dnxt.delsys = c->delivery_system; 1154 state->dnxt.modulation = c->modulation; 1155 state->dnxt.frequency = c->frequency; 1156 state->dnxt.pilot = c->pilot; 1157 1158 ret = cx24120_set_inversion(state, c->inversion); 1159 if (ret != 0) 1160 return ret; 1161 1162 ret = cx24120_set_fec(state, c->modulation, c->fec_inner); 1163 if (ret != 0) 1164 return ret; 1165 1166 ret = cx24120_set_pilot(state, c->pilot); 1167 if (ret != 0) 1168 return ret; 1169 1170 ret = cx24120_set_symbolrate(state, c->symbol_rate); 1171 if (ret != 0) 1172 return ret; 1173 1174 /* discard the 'current' tuning parameters and prepare to tune */ 1175 cx24120_clone_params(fe); 1176 1177 dev_dbg(&state->i2c->dev, 1178 "delsys = %d\n", state->dcur.delsys); 1179 dev_dbg(&state->i2c->dev, 1180 "modulation = %d\n", state->dcur.modulation); 1181 dev_dbg(&state->i2c->dev, 1182 "frequency = %d\n", state->dcur.frequency); 1183 dev_dbg(&state->i2c->dev, 1184 "pilot = %d (val = 0x%02x)\n", 1185 state->dcur.pilot, state->dcur.pilot_val); 1186 dev_dbg(&state->i2c->dev, 1187 "symbol_rate = %d (clkdiv/ratediv = 0x%02x/0x%02x)\n", 1188 state->dcur.symbol_rate, 1189 state->dcur.clkdiv, state->dcur.ratediv); 1190 dev_dbg(&state->i2c->dev, 1191 "FEC = %d (mask/val = 0x%02x/0x%02x)\n", 1192 state->dcur.fec, state->dcur.fec_mask, state->dcur.fec_val); 1193 dev_dbg(&state->i2c->dev, 1194 "Inversion = %d (val = 0x%02x)\n", 1195 state->dcur.inversion, state->dcur.inversion_val); 1196 1197 /* Flag that clock needs to be set after tune */ 1198 state->need_clock_set = 1; 1199 1200 /* Tune in */ 1201 cmd.id = CMD_TUNEREQUEST; 1202 cmd.len = 15; 1203 cmd.arg[0] = 0; 1204 cmd.arg[1] = (state->dcur.frequency & 0xff0000) >> 16; 1205 cmd.arg[2] = (state->dcur.frequency & 0x00ff00) >> 8; 1206 cmd.arg[3] = (state->dcur.frequency & 0x0000ff); 1207 cmd.arg[4] = ((state->dcur.symbol_rate / 1000) & 0xff00) >> 8; 1208 cmd.arg[5] = ((state->dcur.symbol_rate / 1000) & 0x00ff); 1209 cmd.arg[6] = state->dcur.inversion; 1210 cmd.arg[7] = state->dcur.fec_val | state->dcur.pilot_val; 1211 cmd.arg[8] = CX24120_SEARCH_RANGE_KHZ >> 8; 1212 cmd.arg[9] = CX24120_SEARCH_RANGE_KHZ & 0xff; 1213 cmd.arg[10] = 0; /* maybe rolloff? */ 1214 cmd.arg[11] = state->dcur.fec_mask; 1215 cmd.arg[12] = state->dcur.ratediv; 1216 cmd.arg[13] = state->dcur.clkdiv; 1217 cmd.arg[14] = 0; 1218 1219 /* Send tune command */ 1220 ret = cx24120_message_send(state, &cmd); 1221 if (ret != 0) 1222 return ret; 1223 1224 /* Write symbol rate values */ 1225 ret = cx24120_writereg(state, CX24120_REG_CLKDIV, state->dcur.clkdiv); 1226 ret = cx24120_readreg(state, CX24120_REG_RATEDIV); 1227 ret &= 0xfffffff0; 1228 ret |= state->dcur.ratediv; 1229 ret = cx24120_writereg(state, CX24120_REG_RATEDIV, ret); 1230 1231 return 0; 1232 } 1233 1234 /* Set vco from config */ cx24120_set_vco(struct cx24120_state * state)1235 static int cx24120_set_vco(struct cx24120_state *state) 1236 { 1237 struct cx24120_cmd cmd; 1238 u32 nxtal_khz, vco; 1239 u64 inv_vco; 1240 u32 xtal_khz = state->config->xtal_khz; 1241 1242 nxtal_khz = xtal_khz * 4; 1243 vco = nxtal_khz * 10; 1244 inv_vco = DIV_ROUND_CLOSEST_ULL(0x400000000ULL, vco); 1245 1246 dev_dbg(&state->i2c->dev, "xtal=%d, vco=%d, inv_vco=%lld\n", 1247 xtal_khz, vco, inv_vco); 1248 1249 cmd.id = CMD_VCO_SET; 1250 cmd.len = 12; 1251 cmd.arg[0] = (vco >> 16) & 0xff; 1252 cmd.arg[1] = (vco >> 8) & 0xff; 1253 cmd.arg[2] = vco & 0xff; 1254 cmd.arg[3] = (inv_vco >> 8) & 0xff; 1255 cmd.arg[4] = (inv_vco) & 0xff; 1256 cmd.arg[5] = 0x03; 1257 cmd.arg[6] = (nxtal_khz >> 8) & 0xff; 1258 cmd.arg[7] = nxtal_khz & 0xff; 1259 cmd.arg[8] = 0x06; 1260 cmd.arg[9] = 0x03; 1261 cmd.arg[10] = (xtal_khz >> 16) & 0xff; 1262 cmd.arg[11] = xtal_khz & 0xff; 1263 1264 return cx24120_message_send(state, &cmd); 1265 } 1266 cx24120_init(struct dvb_frontend * fe)1267 static int cx24120_init(struct dvb_frontend *fe) 1268 { 1269 const struct firmware *fw; 1270 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1271 struct cx24120_state *state = fe->demodulator_priv; 1272 struct cx24120_cmd cmd; 1273 u8 reg; 1274 int ret, i; 1275 unsigned char vers[4]; 1276 1277 if (state->cold_init) 1278 return 0; 1279 1280 /* ???? */ 1281 cx24120_writereg(state, 0xea, 0x00); 1282 cx24120_test_rom(state); 1283 reg = cx24120_readreg(state, 0xfb) & 0xfe; 1284 cx24120_writereg(state, 0xfb, reg); 1285 reg = cx24120_readreg(state, 0xfc) & 0xfe; 1286 cx24120_writereg(state, 0xfc, reg); 1287 cx24120_writereg(state, 0xc3, 0x04); 1288 cx24120_writereg(state, 0xc4, 0x04); 1289 cx24120_writereg(state, 0xce, 0x00); 1290 cx24120_writereg(state, 0xcf, 0x00); 1291 reg = cx24120_readreg(state, 0xea) & 0xfe; 1292 cx24120_writereg(state, 0xea, reg); 1293 cx24120_writereg(state, 0xeb, 0x0c); 1294 cx24120_writereg(state, 0xec, 0x06); 1295 cx24120_writereg(state, 0xed, 0x05); 1296 cx24120_writereg(state, 0xee, 0x03); 1297 cx24120_writereg(state, 0xef, 0x05); 1298 cx24120_writereg(state, 0xf3, 0x03); 1299 cx24120_writereg(state, 0xf4, 0x44); 1300 1301 for (i = 0; i < 3; i++) { 1302 cx24120_writereg(state, 0xf0 + i, 0x04); 1303 cx24120_writereg(state, 0xe6 + i, 0x02); 1304 } 1305 1306 cx24120_writereg(state, 0xea, (reg | 0x01)); 1307 for (i = 0; i < 6; i += 2) { 1308 cx24120_writereg(state, 0xc5 + i, 0x00); 1309 cx24120_writereg(state, 0xc6 + i, 0x00); 1310 } 1311 1312 cx24120_writereg(state, 0xe4, 0x03); 1313 cx24120_writereg(state, 0xeb, 0x0a); 1314 1315 dev_dbg(&state->i2c->dev, "requesting firmware (%s) to download...\n", 1316 CX24120_FIRMWARE); 1317 1318 ret = state->config->request_firmware(fe, &fw, CX24120_FIRMWARE); 1319 if (ret) { 1320 err("Could not load firmware (%s): %d\n", CX24120_FIRMWARE, 1321 ret); 1322 return ret; 1323 } 1324 1325 dev_dbg(&state->i2c->dev, 1326 "Firmware found, size %d bytes (%02x %02x .. %02x %02x)\n", 1327 (int)fw->size, /* firmware_size in bytes */ 1328 fw->data[0], /* fw 1st byte */ 1329 fw->data[1], /* fw 2d byte */ 1330 fw->data[fw->size - 2], /* fw before last byte */ 1331 fw->data[fw->size - 1]); /* fw last byte */ 1332 1333 cx24120_test_rom(state); 1334 reg = cx24120_readreg(state, 0xfb) & 0xfe; 1335 cx24120_writereg(state, 0xfb, reg); 1336 cx24120_writereg(state, 0xe0, 0x76); 1337 cx24120_writereg(state, 0xf7, 0x81); 1338 cx24120_writereg(state, 0xf8, 0x00); 1339 cx24120_writereg(state, 0xf9, 0x00); 1340 cx24120_writeregs(state, 0xfa, fw->data, (fw->size - 1), 0x00); 1341 cx24120_writereg(state, 0xf7, 0xc0); 1342 cx24120_writereg(state, 0xe0, 0x00); 1343 reg = (fw->size - 2) & 0x00ff; 1344 cx24120_writereg(state, 0xf8, reg); 1345 reg = ((fw->size - 2) >> 8) & 0x00ff; 1346 cx24120_writereg(state, 0xf9, reg); 1347 cx24120_writereg(state, 0xf7, 0x00); 1348 cx24120_writereg(state, 0xdc, 0x00); 1349 cx24120_writereg(state, 0xdc, 0x07); 1350 msleep(500); 1351 1352 /* Check final byte matches final byte of firmware */ 1353 reg = cx24120_readreg(state, 0xe1); 1354 if (reg == fw->data[fw->size - 1]) { 1355 dev_dbg(&state->i2c->dev, "Firmware uploaded successfully\n"); 1356 ret = 0; 1357 } else { 1358 err("Firmware upload failed. Last byte returned=0x%x\n", ret); 1359 ret = -EREMOTEIO; 1360 } 1361 cx24120_writereg(state, 0xdc, 0x00); 1362 release_firmware(fw); 1363 if (ret != 0) 1364 return ret; 1365 1366 /* Start tuner */ 1367 cmd.id = CMD_START_TUNER; 1368 cmd.len = 3; 1369 cmd.arg[0] = 0x00; 1370 cmd.arg[1] = 0x00; 1371 cmd.arg[2] = 0x00; 1372 1373 if (cx24120_message_send(state, &cmd) != 0) { 1374 err("Error tuner start! :(\n"); 1375 return -EREMOTEIO; 1376 } 1377 1378 /* Set VCO */ 1379 ret = cx24120_set_vco(state); 1380 if (ret != 0) { 1381 err("Error set VCO! :(\n"); 1382 return ret; 1383 } 1384 1385 /* set bandwidth */ 1386 cmd.id = CMD_BANDWIDTH; 1387 cmd.len = 12; 1388 cmd.arg[0] = 0x00; 1389 cmd.arg[1] = 0x00; 1390 cmd.arg[2] = 0x00; 1391 cmd.arg[3] = 0x00; 1392 cmd.arg[4] = 0x05; 1393 cmd.arg[5] = 0x02; 1394 cmd.arg[6] = 0x02; 1395 cmd.arg[7] = 0x00; 1396 cmd.arg[8] = 0x05; 1397 cmd.arg[9] = 0x02; 1398 cmd.arg[10] = 0x02; 1399 cmd.arg[11] = 0x00; 1400 1401 if (cx24120_message_send(state, &cmd)) { 1402 err("Error set bandwidth!\n"); 1403 return -EREMOTEIO; 1404 } 1405 1406 reg = cx24120_readreg(state, 0xba); 1407 if (reg > 3) { 1408 dev_dbg(&state->i2c->dev, "Reset-readreg 0xba: %x\n", ret); 1409 err("Error initialising tuner!\n"); 1410 return -EREMOTEIO; 1411 } 1412 1413 dev_dbg(&state->i2c->dev, "Tuner initialised correctly.\n"); 1414 1415 /* Initialise mpeg outputs */ 1416 cx24120_writereg(state, 0xeb, 0x0a); 1417 if (cx24120_msg_mpeg_output_global_config(state, 0) || 1418 cx24120_msg_mpeg_output_config(state, 0) || 1419 cx24120_msg_mpeg_output_config(state, 1) || 1420 cx24120_msg_mpeg_output_config(state, 2)) { 1421 err("Error initialising mpeg output. :(\n"); 1422 return -EREMOTEIO; 1423 } 1424 1425 /* Set size of BER window */ 1426 cmd.id = CMD_BER_CTRL; 1427 cmd.len = 3; 1428 cmd.arg[0] = 0x00; 1429 cmd.arg[1] = CX24120_BER_WINDOW; 1430 cmd.arg[2] = CX24120_BER_WINDOW; 1431 if (cx24120_message_send(state, &cmd)) { 1432 err("Error setting ber window\n"); 1433 return -EREMOTEIO; 1434 } 1435 1436 /* Firmware CMD 35: Get firmware version */ 1437 cmd.id = CMD_FWVERSION; 1438 cmd.len = 1; 1439 for (i = 0; i < 4; i++) { 1440 cmd.arg[0] = i; 1441 ret = cx24120_message_send(state, &cmd); 1442 if (ret != 0) 1443 return ret; 1444 vers[i] = cx24120_readreg(state, CX24120_REG_MAILBOX); 1445 } 1446 info("FW version %i.%i.%i.%i\n", vers[0], vers[1], vers[2], vers[3]); 1447 1448 /* init stats here in order signal app which stats are supported */ 1449 c->strength.len = 1; 1450 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE; 1451 c->cnr.len = 1; 1452 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE; 1453 c->post_bit_error.len = 1; 1454 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE; 1455 c->post_bit_count.len = 1; 1456 c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE; 1457 c->block_error.len = 1; 1458 c->block_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE; 1459 c->block_count.len = 1; 1460 c->block_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE; 1461 1462 state->cold_init = 1; 1463 1464 return 0; 1465 } 1466 cx24120_tune(struct dvb_frontend * fe,bool re_tune,unsigned int mode_flags,unsigned int * delay,enum fe_status * status)1467 static int cx24120_tune(struct dvb_frontend *fe, bool re_tune, 1468 unsigned int mode_flags, unsigned int *delay, 1469 enum fe_status *status) 1470 { 1471 struct cx24120_state *state = fe->demodulator_priv; 1472 int ret; 1473 1474 dev_dbg(&state->i2c->dev, "(%d)\n", re_tune); 1475 1476 /* TODO: Do we need to set delay? */ 1477 1478 if (re_tune) { 1479 ret = cx24120_set_frontend(fe); 1480 if (ret) 1481 return ret; 1482 } 1483 1484 return cx24120_read_status(fe, status); 1485 } 1486 cx24120_get_algo(struct dvb_frontend * fe)1487 static enum dvbfe_algo cx24120_get_algo(struct dvb_frontend *fe) 1488 { 1489 return DVBFE_ALGO_HW; 1490 } 1491 cx24120_sleep(struct dvb_frontend * fe)1492 static int cx24120_sleep(struct dvb_frontend *fe) 1493 { 1494 return 0; 1495 } 1496 cx24120_get_frontend(struct dvb_frontend * fe,struct dtv_frontend_properties * c)1497 static int cx24120_get_frontend(struct dvb_frontend *fe, 1498 struct dtv_frontend_properties *c) 1499 { 1500 struct cx24120_state *state = fe->demodulator_priv; 1501 u8 freq1, freq2, freq3; 1502 int status; 1503 1504 dev_dbg(&state->i2c->dev, "\n"); 1505 1506 /* don't return empty data if we're not tuned in */ 1507 status = cx24120_readreg(state, CX24120_REG_STATUS); 1508 if (!(status & CX24120_HAS_LOCK)) 1509 return 0; 1510 1511 /* Get frequency */ 1512 freq1 = cx24120_readreg(state, CX24120_REG_FREQ1); 1513 freq2 = cx24120_readreg(state, CX24120_REG_FREQ2); 1514 freq3 = cx24120_readreg(state, CX24120_REG_FREQ3); 1515 c->frequency = (freq3 << 16) | (freq2 << 8) | freq1; 1516 dev_dbg(&state->i2c->dev, "frequency = %d\n", c->frequency); 1517 1518 /* Get modulation, fec, pilot */ 1519 cx24120_get_fec(fe); 1520 1521 return 0; 1522 } 1523 cx24120_release(struct dvb_frontend * fe)1524 static void cx24120_release(struct dvb_frontend *fe) 1525 { 1526 struct cx24120_state *state = fe->demodulator_priv; 1527 1528 dev_dbg(&state->i2c->dev, "Clear state structure\n"); 1529 kfree(state); 1530 } 1531 cx24120_read_ucblocks(struct dvb_frontend * fe,u32 * ucblocks)1532 static int cx24120_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks) 1533 { 1534 struct cx24120_state *state = fe->demodulator_priv; 1535 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 1536 1537 if (c->block_error.stat[0].scale != FE_SCALE_COUNTER) { 1538 *ucblocks = 0; 1539 return 0; 1540 } 1541 1542 *ucblocks = c->block_error.stat[0].uvalue - state->ucb_offset; 1543 1544 return 0; 1545 } 1546 1547 static const struct dvb_frontend_ops cx24120_ops = { 1548 .delsys = { SYS_DVBS, SYS_DVBS2 }, 1549 .info = { 1550 .name = "Conexant CX24120/CX24118", 1551 .frequency_min_hz = 950 * MHz, 1552 .frequency_max_hz = 2150 * MHz, 1553 .frequency_stepsize_hz = 1011 * kHz, 1554 .frequency_tolerance_hz = 5 * MHz, 1555 .symbol_rate_min = 1000000, 1556 .symbol_rate_max = 45000000, 1557 .caps = FE_CAN_INVERSION_AUTO | 1558 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 | 1559 FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 | 1560 FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO | 1561 FE_CAN_2G_MODULATION | 1562 FE_CAN_QPSK | FE_CAN_RECOVER 1563 }, 1564 .release = cx24120_release, 1565 1566 .init = cx24120_init, 1567 .sleep = cx24120_sleep, 1568 1569 .tune = cx24120_tune, 1570 .get_frontend_algo = cx24120_get_algo, 1571 .set_frontend = cx24120_set_frontend, 1572 1573 .get_frontend = cx24120_get_frontend, 1574 .read_status = cx24120_read_status, 1575 .read_ber = cx24120_read_ber, 1576 .read_signal_strength = cx24120_read_signal_strength, 1577 .read_snr = cx24120_read_snr, 1578 .read_ucblocks = cx24120_read_ucblocks, 1579 1580 .diseqc_send_master_cmd = cx24120_send_diseqc_msg, 1581 1582 .diseqc_send_burst = cx24120_diseqc_send_burst, 1583 .set_tone = cx24120_set_tone, 1584 .set_voltage = cx24120_set_voltage, 1585 }; 1586 1587 MODULE_DESCRIPTION("DVB Frontend module for Conexant CX24120/CX24118 hardware"); 1588 MODULE_AUTHOR("Jemma Denson"); 1589 MODULE_LICENSE("GPL"); 1590
