drivers/media/dvb-frontends/cx24120.c

   1 /*
   2     Conexant cx24120/cx24118 - DVBS/S2 Satellite demod/tuner driver
   3
   4     Copyright (C) 2008 Patrick Boettcher <pb@linuxtv.org>
   5     Copyright (C) 2009 Sergey Tyurin <forum.free-x.de>
   6     Updated 2012 by Jannis Achstetter <jannis_achstetter@web.de>
   7     Copyright (C) 2015 Jemma Denson <jdenson@gmail.com>
   8         April 2015
   9             Refactored & simplified driver
  10             Updated to work with delivery system supplied by DVBv5
  11             Add frequency, fec & pilot to get_frontend
  12
  13         Cards supported: Technisat Skystar S2
  14
  15     This program is free software; you can redistribute it and/or modify
  16     it under the terms of the GNU General Public License as published by
  17     the Free Software Foundation; either version 2 of the License, or
  18     (at your option) any later version.
  19
  20     This program is distributed in the hope that it will be useful,
  21     but WITHOUT ANY WARRANTY; without even the implied warranty of
  22     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23     GNU General Public License for more details.
  24 */
  25
  26 #include <linux/slab.h>
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/moduleparam.h>
  30 #include <linux/init.h>
  31 #include <linux/firmware.h>
  32 #include "dvb_frontend.h"
  33 #include "cx24120.h"
  34
  35 #define CX24120_SEARCH_RANGE_KHZ 5000
  36 #define CX24120_FIRMWARE "dvb-fe-cx24120-1.20.58.2.fw"
  37
  38 /* cx24120 i2c registers  */
  39 #define CX24120_REG_CMD_START   (0x00)          /* write cmd_id */
  40 #define CX24120_REG_CMD_ARGS    (0x01)          /* write command arguments */
  41 #define CX24120_REG_CMD_END     (0x1f)          /* write 0x01 for end */
  42
  43 #define CX24120_REG_MAILBOX     (0x33)
  44 #define CX24120_REG_FREQ3       (0x34)          /* frequency */
  45 #define CX24120_REG_FREQ2       (0x35)
  46 #define CX24120_REG_FREQ1       (0x36)
  47
  48 #define CX24120_REG_FECMODE     (0x39)          /* FEC status */
  49 #define CX24120_REG_STATUS      (0x3a)          /* Tuner status */
  50 #define CX24120_REG_SIGSTR_H    (0x3a)          /* Signal strength high */
  51 #define CX24120_REG_SIGSTR_L    (0x3b)          /* Signal strength low byte */
  52 #define CX24120_REG_QUALITY_H   (0x40)          /* SNR high byte */
  53 #define CX24120_REG_QUALITY_L   (0x41)          /* SNR low byte */
  54
  55 #define CX24120_REG_BER_HH      (0x47)          /* BER high byte of high word */
  56 #define CX24120_REG_BER_HL      (0x48)          /* BER low byte of high word */
  57 #define CX24120_REG_BER_LH      (0x49)          /* BER high byte of low word */
  58 #define CX24120_REG_BER_LL      (0x4a)          /* BER low byte of low word */
  59
  60 #define CX24120_REG_UCB_H       (0x50)          /* UCB high byte */
  61 #define CX24120_REG_UCB_L       (0x51)          /* UCB low byte  */
  62
  63 #define CX24120_REG_CLKDIV      (0xe6)
  64 #define CX24120_REG_RATEDIV     (0xf0)
  65
  66 #define CX24120_REG_REVISION    (0xff)          /* Chip revision (ro) */
  67
  68
  69 /* Command messages */
  70 enum command_message_id {
  71         CMD_VCO_SET             = 0x10,         /* cmd.len = 12; */
  72         CMD_TUNEREQUEST         = 0x11,         /* cmd.len = 15; */
  73
  74         CMD_MPEG_ONOFF          = 0x13,         /* cmd.len = 4; */
  75         CMD_MPEG_INIT           = 0x14,         /* cmd.len = 7; */
  76         CMD_BANDWIDTH           = 0x15,         /* cmd.len = 12; */
  77         CMD_CLOCK_READ          = 0x16,         /* read clock */
  78         CMD_CLOCK_SET           = 0x17,         /* cmd.len = 10; */
  79
  80         CMD_DISEQC_MSG1         = 0x20,         /* cmd.len = 11; */
  81         CMD_DISEQC_MSG2         = 0x21,         /* cmd.len = d->msg_len + 6; */
  82         CMD_SETVOLTAGE          = 0x22,         /* cmd.len = 2; */
  83         CMD_SETTONE             = 0x23,         /* cmd.len = 4; */
  84         CMD_DISEQC_BURST        = 0x24,         /* cmd.len not used !!! */
  85
  86         CMD_READ_SNR            = 0x1a,         /* Read signal strength */
  87         CMD_START_TUNER         = 0x1b,         /* ??? */
  88
  89         CMD_FWVERSION           = 0x35,
  90
  91         CMD_TUNER_INIT          = 0x3c,         /* cmd.len = 0x03; */
  92 };
  93
  94 #define CX24120_MAX_CMD_LEN     30
  95
  96 /* pilot mask */
  97 #define CX24120_PILOT_OFF       (0x00)
  98 #define CX24120_PILOT_ON        (0x40)
  99 #define CX24120_PILOT_AUTO      (0x80)
 100
 101 /* signal status */
 102 #define CX24120_HAS_SIGNAL      (0x01)
 103 #define CX24120_HAS_CARRIER     (0x02)
 104 #define CX24120_HAS_VITERBI     (0x04)
 105 #define CX24120_HAS_LOCK        (0x08)
 106 #define CX24120_HAS_UNK1        (0x10)
 107 #define CX24120_HAS_UNK2        (0x20)
 108 #define CX24120_STATUS_MASK     (0x0f)
 109 #define CX24120_SIGNAL_MASK     (0xc0)
 110
 111 #define info(args...) pr_info("cx24120: " args)
 112 #define err(args...)  pr_err("cx24120: ### ERROR: " args)
 113
 114 /* The Demod/Tuner can't easily provide these, we cache them */
 115 struct cx24120_tuning {
 116         u32 frequency;
 117         u32 symbol_rate;
 118         fe_spectral_inversion_t inversion;
 119         fe_code_rate_t fec;
 120
 121         fe_delivery_system_t delsys;
 122         fe_modulation_t modulation;
 123         fe_pilot_t pilot;
 124
 125         /* Demod values */
 126         u8 fec_val;
 127         u8 fec_mask;
 128         u8 clkdiv;
 129         u8 ratediv;
 130         u8 inversion_val;
 131         u8 pilot_val;
 132 };
 133
 134
 135 /* Private state */
 136 struct cx24120_state {
 137         struct i2c_adapter *i2c;
 138         const struct cx24120_config *config;
 139         struct dvb_frontend frontend;
 140
 141         u8 cold_init;
 142         u8 mpeg_enabled;
 143
 144         /* current and next tuning parameters */
 145         struct cx24120_tuning dcur;
 146         struct cx24120_tuning dnxt;
 147 };
 148
 149
 150 /* Command message to firmware */
 151 struct cx24120_cmd {
 152         u8 id;
 153         u8 len;
 154         u8 arg[CX24120_MAX_CMD_LEN];
 155 };
 156
 157
 158 /* Read single register */
 159 static int cx24120_readreg(struct cx24120_state *state, u8 reg)
 160 {
 161         int ret;
 162         u8 buf = 0;
 163         struct i2c_msg msg[] = {
 164                 {       .addr = state->config->i2c_addr,
 165                         .flags = 0,
 166                         .len = 1,
 167                         .buf = &reg     },
 168
 169                 {       .addr = state->config->i2c_addr,
 170                         .flags = I2C_M_RD,
 171                         .len = 1,
 172                         .buf = &buf     }
 173         };
 174         ret = i2c_transfer(state->i2c, msg, 2);
 175         if (ret != 2) {
 176                 err("Read error: reg=0x%02x, ret=0x%02x)\n", reg, ret);
 177                 return ret;
 178         }
 179
 180         dev_dbg(&state->i2c->dev, "%s: reg=0x%02x; data=0x%02x\n",
 181                 __func__, reg, buf);
 182
 183         return buf;
 184 }
 185
 186
 187 /* Write single register */
 188 static int cx24120_writereg(struct cx24120_state *state, u8 reg, u8 data)
 189 {
 190         u8 buf[] = { reg, data };
 191         struct i2c_msg msg = {
 192                 .addr = state->config->i2c_addr,
 193                 .flags = 0,
 194                 .buf = buf,
 195                 .len = 2 };
 196         int ret;
 197
 198         ret = i2c_transfer(state->i2c, &msg, 1);
 199         if (ret != 1) {
 200                 err("Write error: i2c_write error(err == %i, 0x%02x: 0x%02x)\n",
 201                                  ret, reg, data);
 202                 return ret;
 203         }
 204
 205         dev_dbg(&state->i2c->dev, "%s: reg=0x%02x; data=0x%02x\n",
 206                 __func__, reg, data);
 207
 208         return 0;
 209 }
 210
 211
 212 /* Write multiple registers */
 213 static int cx24120_writeregN(struct cx24120_state *state,
 214                         u8 reg, const u8 *values, u16 len, u8 incr)
 215 {
 216         int ret;
 217         u8 buf[5]; /* maximum 4 data bytes at once - flexcop limitation
 218                         (very limited i2c-interface this one) */
 219
 220         struct i2c_msg msg = {
 221                 .addr = state->config->i2c_addr,
 222                 .flags = 0,
 223                 .buf = buf,
 224                 .len = len };
 225
 226         while (len) {
 227                 buf[0] = reg;
 228                 msg.len = len > 4 ? 4 : len;
 229                 memcpy(&buf[1], values, msg.len);
 230
 231                 len  -= msg.len;                /* data length revers counter */
 232                 values += msg.len;              /* incr data pointer */
 233
 234                 if (incr)
 235                         reg += msg.len;
 236                 msg.len++;                      /* don't forget the addr byte */
 237
 238                 ret = i2c_transfer(state->i2c, &msg, 1);
 239                 if (ret != 1) {
 240                         err("i2c_write error(err == %i, 0x%02x)\n", ret, reg);
 241                         return ret;
 242                 }
 243
 244                 dev_dbg(&state->i2c->dev,
 245                         "%s: reg=0x%02x; data=0x%02x,0x%02x,0x%02x,0x%02x\n",
 246                         __func__, reg,
 247                         buf[1], buf[2], buf[3], buf[4]);
 248
 249         }
 250
 251         return 0;
 252 }
 253
 254
 255 static struct dvb_frontend_ops cx24120_ops;
 256
 257 struct dvb_frontend *cx24120_attach(const struct cx24120_config *config,
 258                         struct i2c_adapter *i2c)
 259 {
 260         struct cx24120_state *state = NULL;
 261         int demod_rev;
 262
 263         info("Conexant cx24120/cx24118 - DVBS/S2 Satellite demod/tuner\n");
 264         state = kzalloc(sizeof(struct cx24120_state),
 265                                                 GFP_KERNEL);
 266         if (state == NULL) {
 267                 err("Unable to allocate memory for cx24120_state\n");
 268                 goto error;
 269         }
 270
 271         /* setup the state */
 272         state->config = config;
 273         state->i2c = i2c;
 274
 275         /* check if the demod is present and has proper type */
 276         demod_rev = cx24120_readreg(state, CX24120_REG_REVISION);
 277         switch (demod_rev) {
 278         case 0x07:
 279                 info("Demod cx24120 rev. 0x07 detected.\n");
 280                 break;
 281         case 0x05:
 282                 info("Demod cx24120 rev. 0x05 detected.\n");
 283                 break;
 284         default:
 285                 err("Unsupported demod revision: 0x%x detected.\n",
 286                         demod_rev);
 287                 goto error;
 288         }
 289
 290         /* create dvb_frontend */
 291         state->cold_init = 0;
 292         memcpy(&state->frontend.ops, &cx24120_ops,
 293                         sizeof(struct dvb_frontend_ops));
 294         state->frontend.demodulator_priv = state;
 295
 296         info("Conexant cx24120/cx24118 attached.\n");
 297         return &state->frontend;
 298
 299 error:
 300         kfree(state);
 301         return NULL;
 302 }
 303 EXPORT_SYMBOL(cx24120_attach);
 304
 305 static int cx24120_test_rom(struct cx24120_state *state)
 306 {
 307         int err, ret;
 308
 309         err = cx24120_readreg(state, 0xfd);
 310         if (err & 4) {
 311                 ret = cx24120_readreg(state, 0xdf) & 0xfe;
 312                 err = cx24120_writereg(state, 0xdf, ret);
 313         }
 314         return err;
 315 }
 316
 317
 318 static int cx24120_read_snr(struct dvb_frontend *fe, u16 *snr)
 319 {
 320         struct cx24120_state *state = fe->demodulator_priv;
 321
 322         *snr =  (cx24120_readreg(state, CX24120_REG_QUALITY_H)<<8) |
 323                 (cx24120_readreg(state, CX24120_REG_QUALITY_L));
 324         dev_dbg(&state->i2c->dev, "%s: read SNR index = %d\n",
 325                         __func__, *snr);
 326
 327         return 0;
 328 }
 329
 330
 331 static int cx24120_read_ber(struct dvb_frontend *fe, u32 *ber)
 332 {
 333         struct cx24120_state *state = fe->demodulator_priv;
 334
 335         *ber =  (cx24120_readreg(state, CX24120_REG_BER_HH) << 24)      |
 336                 (cx24120_readreg(state, CX24120_REG_BER_HL) << 16)      |
 337                 (cx24120_readreg(state, CX24120_REG_BER_LH)  << 8)      |
 338                  cx24120_readreg(state, CX24120_REG_BER_LL);
 339         dev_dbg(&state->i2c->dev, "%s: read BER index = %d\n",
 340                         __func__, *ber);
 341
 342         return 0;
 343 }
 344
 345 static int cx24120_msg_mpeg_output_global_config(struct cx24120_state *state,
 346                         u8 flag);
 347
 348 /* Check if we're running a command that needs to disable mpeg out */
 349 static void cx24120_check_cmd(struct cx24120_state *state, u8 id)
 350 {
 351         switch (id) {
 352         case CMD_TUNEREQUEST:
 353         case CMD_CLOCK_READ:
 354         case CMD_DISEQC_MSG1:
 355         case CMD_DISEQC_MSG2:
 356         case CMD_SETVOLTAGE:
 357         case CMD_SETTONE:
 358                 cx24120_msg_mpeg_output_global_config(state, 0);
 359                 /* Old driver would do a msleep(100) here */
 360         default:
 361                 return;
 362         }
 363 }
 364
 365
 366 /* Send a message to the firmware */
 367 static int cx24120_message_send(struct cx24120_state *state,
 368                         struct cx24120_cmd *cmd)
 369 {
 370         int ret, ficus;
 371
 372         if (state->mpeg_enabled) {
 373                 /* Disable mpeg out on certain commands */
 374                 cx24120_check_cmd(state, cmd->id);
 375         }
 376
 377         ret = cx24120_writereg(state, CX24120_REG_CMD_START, cmd->id);
 378         ret = cx24120_writeregN(state, CX24120_REG_CMD_ARGS, &cmd->arg[0],
 379                                 cmd->len, 1);
 380         ret = cx24120_writereg(state, CX24120_REG_CMD_END, 0x01);
 381
 382         ficus = 1000;
 383         while (cx24120_readreg(state, CX24120_REG_CMD_END)) {
 384                 msleep(20);
 385                 ficus -= 20;
 386                 if (ficus == 0) {
 387                         err("Error sending message to firmware\n");
 388                         return -EREMOTEIO;
 389                 }
 390         }
 391         dev_dbg(&state->i2c->dev, "%s: Successfully send message 0x%02x\n",
 392                 __func__, cmd->id);
 393
 394         return 0;
 395 }
 396
 397 /* Send a message and fill arg[] with the results */
 398 static int cx24120_message_sendrcv(struct cx24120_state *state,
 399                         struct cx24120_cmd *cmd, u8 numreg)
 400 {
 401         int ret, i;
 402
 403         if (numreg > CX24120_MAX_CMD_LEN) {
 404                 err("Too many registers to read. cmd->reg = %d", numreg);
 405                 return -EREMOTEIO;
 406         }
 407
 408         ret = cx24120_message_send(state, cmd);
 409         if (ret != 0)
 410                 return ret;
 411
 412         if (!numreg)
 413                 return 0;
 414
 415         /* Read numreg registers starting from register cmd->len */
 416         for (i = 0; i < numreg; i++)
 417                 cmd->arg[i] = cx24120_readreg(state, (cmd->len+i+1));
 418
 419         return 0;
 420 }
 421
 422
 423
 424 static int cx24120_read_signal_strength(struct dvb_frontend *fe,
 425                         u16 *signal_strength)
 426 {
 427         struct cx24120_state *state = fe->demodulator_priv;
 428         struct cx24120_cmd cmd;
 429         int ret, sigstr_h, sigstr_l;
 430
 431         cmd.id = CMD_READ_SNR;
 432         cmd.len = 1;
 433         cmd.arg[0] = 0x00;
 434
 435         ret = cx24120_message_send(state, &cmd);
 436         if (ret != 0) {
 437                 err("error reading signal strength\n");
 438                 return -EREMOTEIO;
 439         }
 440
 441         /* raw */
 442         sigstr_h = (cx24120_readreg(state, CX24120_REG_SIGSTR_H) >> 6) << 8;
 443         sigstr_l = cx24120_readreg(state, CX24120_REG_SIGSTR_L);
 444         dev_dbg(&state->i2c->dev, "%s: Signal strength from firmware= 0x%x\n",
 445                         __func__, (sigstr_h | sigstr_l));
 446
 447         /* cooked */
 448         *signal_strength = ((sigstr_h | sigstr_l)  << 5) & 0x0000ffff;
 449         dev_dbg(&state->i2c->dev, "%s: Signal strength= 0x%x\n",
 450                         __func__, *signal_strength);
 451
 452         return 0;
 453 }
 454
 455
 456 static int cx24120_msg_mpeg_output_global_config(struct cx24120_state *state,
 457                         u8 enable)
 458 {
 459         struct cx24120_cmd cmd;
 460         int ret;
 461
 462         cmd.id = CMD_MPEG_ONOFF;
 463         cmd.len = 4;
 464         cmd.arg[0] = 0x01;
 465         cmd.arg[1] = 0x00;
 466         cmd.arg[2] = enable ? 0 : (u8)(-1);
 467         cmd.arg[3] = 0x01;
 468
 469         ret = cx24120_message_send(state, &cmd);
 470         if (ret != 0) {
 471                 dev_dbg(&state->i2c->dev,
 472                         "%s: Failed to set MPEG output to %s\n",
 473                         __func__,
 474                         (enable)?"enabled":"disabled");
 475                 return ret;
 476         }
 477
 478         state->mpeg_enabled = enable;
 479         dev_dbg(&state->i2c->dev, "%s: MPEG output %s\n",
 480                 __func__,
 481                 (enable)?"enabled":"disabled");
 482
 483         return 0;
 484 }
 485
 486
 487 static int cx24120_msg_mpeg_output_config(struct cx24120_state *state, u8 seq)
 488 {
 489         struct cx24120_cmd cmd;
 490         struct cx24120_initial_mpeg_config i =
 491                         state->config->initial_mpeg_config;
 492
 493         cmd.id = CMD_MPEG_INIT;
 494         cmd.len = 7;
 495         cmd.arg[0] = seq;               /* sequental number - can be 0,1,2 */
 496         cmd.arg[1] = ((i.x1 & 0x01) << 1) | ((i.x1 >> 1) & 0x01);
 497         cmd.arg[2] = 0x05;
 498         cmd.arg[3] = 0x02;
 499         cmd.arg[4] = ((i.x2 >> 1) & 0x01);
 500         cmd.arg[5] = (i.x2 & 0xf0) | (i.x3 & 0x0f);
 501         cmd.arg[6] = 0x10;
 502
 503         return cx24120_message_send(state, &cmd);
 504 }
 505
 506
 507 static int cx24120_diseqc_send_burst(struct dvb_frontend *fe,
 508                         fe_sec_mini_cmd_t burst)
 509 {
 510         struct cx24120_state *state = fe->demodulator_priv;
 511         struct cx24120_cmd cmd;
 512
 513         /* Yes, cmd.len is set to zero. The old driver
 514          * didn't specify any len, but also had a
 515          * memset 0 before every use of the cmd struct
 516          * which would have set it to zero.
 517          * This quite probably needs looking into.
 518          */
 519         cmd.id = CMD_DISEQC_BURST;
 520         cmd.len = 0;
 521         cmd.arg[0] = 0x00;
 522         if (burst)
 523                 cmd.arg[1] = 0x01;
 524         dev_dbg(&state->i2c->dev, "%s: burst sent.\n", __func__);
 525
 526         return cx24120_message_send(state, &cmd);
 527 }
 528
 529
 530 static int cx24120_set_tone(struct dvb_frontend *fe, fe_sec_tone_mode_t tone)
 531 {
 532         struct cx24120_state *state = fe->demodulator_priv;
 533         struct cx24120_cmd cmd;
 534
 535         dev_dbg(&state->i2c->dev, "%s(%d)\n",
 536                         __func__, tone);
 537
 538         if ((tone != SEC_TONE_ON) && (tone != SEC_TONE_OFF)) {
 539                 err("Invalid tone=%d\n", tone);
 540                 return -EINVAL;
 541         }
 542
 543         cmd.id = CMD_SETTONE;
 544         cmd.len = 4;
 545         cmd.arg[0] = 0x00;
 546         cmd.arg[1] = 0x00;
 547         cmd.arg[2] = 0x00;
 548         cmd.arg[3] = (tone == SEC_TONE_ON)?0x01:0x00;
 549
 550         return cx24120_message_send(state, &cmd);
 551 }
 552
 553
 554 static int cx24120_set_voltage(struct dvb_frontend *fe,
 555                         fe_sec_voltage_t voltage)
 556 {
 557         struct cx24120_state *state = fe->demodulator_priv;
 558         struct cx24120_cmd cmd;
 559
 560         dev_dbg(&state->i2c->dev, "%s(%d)\n",
 561                         __func__, voltage);
 562
 563         cmd.id = CMD_SETVOLTAGE;
 564         cmd.len = 2;
 565         cmd.arg[0] = 0x00;
 566         cmd.arg[1] = (voltage == SEC_VOLTAGE_18)?0x01:0x00;
 567
 568         return cx24120_message_send(state, &cmd);
 569 }
 570
 571
 572 static int cx24120_send_diseqc_msg(struct dvb_frontend *fe,
 573                         struct dvb_diseqc_master_cmd *d)
 574 {
 575         struct cx24120_state *state = fe->demodulator_priv;
 576         struct cx24120_cmd cmd;
 577         int back_count;
 578
 579         dev_dbg(&state->i2c->dev, "%s()\n", __func__);
 580
 581         cmd.id = CMD_DISEQC_MSG1;
 582         cmd.len = 11;
 583         cmd.arg[0] = 0x00;
 584         cmd.arg[1] = 0x00;
 585         cmd.arg[2] = 0x03;
 586         cmd.arg[3] = 0x16;
 587         cmd.arg[4] = 0x28;
 588         cmd.arg[5] = 0x01;
 589         cmd.arg[6] = 0x01;
 590         cmd.arg[7] = 0x14;
 591         cmd.arg[8] = 0x19;
 592         cmd.arg[9] = 0x14;
 593         cmd.arg[10] = 0x1e;
 594
 595         if (cx24120_message_send(state, &cmd)) {
 596                 err("send 1st message(0x%x) failed\n", cmd.id);
 597                 return -EREMOTEIO;
 598         }
 599
 600         cmd.id = CMD_DISEQC_MSG2;
 601         cmd.len = d->msg_len + 6;
 602         cmd.arg[0] = 0x00;
 603         cmd.arg[1] = 0x01;
 604         cmd.arg[2] = 0x02;
 605         cmd.arg[3] = 0x00;
 606         cmd.arg[4] = 0x00;
 607         cmd.arg[5] = d->msg_len;
 608
 609         memcpy(&cmd.arg[6], &d->msg, d->msg_len);
 610
 611         if (cx24120_message_send(state, &cmd)) {
 612                 err("send 2nd message(0x%x) failed\n", cmd.id);
 613                 return -EREMOTEIO;
 614         }
 615
 616         back_count = 500;
 617         do {
 618                 if (!(cx24120_readreg(state, 0x93) & 0x01)) {
 619                         dev_dbg(&state->i2c->dev,
 620                                 "%s: diseqc sequence sent success\n",
 621                                 __func__);
 622                         return 0;
 623                 }
 624                 msleep(20);
 625                 back_count -= 20;
 626         } while (back_count);
 627
 628         err("Too long waiting for diseqc.\n");
 629         return -ETIMEDOUT;
 630 }
 631
 632
 633 /* Read current tuning status */
 634 static int cx24120_read_status(struct dvb_frontend *fe, fe_status_t *status)
 635 {
 636         struct cx24120_state *state = fe->demodulator_priv;
 637         int lock;
 638
 639         lock = cx24120_readreg(state, CX24120_REG_STATUS);
 640
 641         dev_dbg(&state->i2c->dev, "%s() status = 0x%02x\n",
 642                 __func__, lock);
 643
 644         *status = 0;
 645
 646         if (lock & CX24120_HAS_SIGNAL)
 647                 *status = FE_HAS_SIGNAL;
 648         if (lock & CX24120_HAS_CARRIER)
 649                 *status |= FE_HAS_CARRIER;
 650         if (lock & CX24120_HAS_VITERBI)
 651                 *status |= FE_HAS_VITERBI | FE_HAS_SYNC;
 652         if (lock & CX24120_HAS_LOCK)
 653                 *status |= FE_HAS_LOCK;
 654
 655         /* TODO: is FE_HAS_SYNC in the right place?
 656          * Other cx241xx drivers have this slightly
 657          * different */
 658
 659         return 0;
 660 }
 661
 662
 663 /* FEC & modulation lookup table
 664  * Used for decoding the REG_FECMODE register
 665  * once tuned in.
 666  */
 667 static struct cx24120_modfec {
 668         fe_delivery_system_t delsys;
 669         fe_modulation_t mod;
 670         fe_code_rate_t fec;
 671         u8 val;
 672 } modfec_lookup_table[] = {
 673 /*delsys        mod     fec             val */
 674 { SYS_DVBS,     QPSK,   FEC_1_2,        0x01 },
 675 { SYS_DVBS,     QPSK,   FEC_2_3,        0x02 },
 676 { SYS_DVBS,     QPSK,   FEC_3_4,        0x03 },
 677 { SYS_DVBS,     QPSK,   FEC_4_5,        0x04 },
 678 { SYS_DVBS,     QPSK,   FEC_5_6,        0x05 },
 679 { SYS_DVBS,     QPSK,   FEC_6_7,        0x06 },
 680 { SYS_DVBS,     QPSK,   FEC_7_8,        0x07 },
 681
 682 { SYS_DVBS2,    QPSK,   FEC_1_2,        0x04 },
 683 { SYS_DVBS2,    QPSK,   FEC_3_5,        0x05 },
 684 { SYS_DVBS2,    QPSK,   FEC_2_3,        0x06 },
 685 { SYS_DVBS2,    QPSK,   FEC_3_4,        0x07 },
 686 { SYS_DVBS2,    QPSK,   FEC_4_5,        0x08 },
 687 { SYS_DVBS2,    QPSK,   FEC_5_6,        0x09 },
 688 { SYS_DVBS2,    QPSK,   FEC_8_9,        0x0a },
 689 { SYS_DVBS2,    QPSK,   FEC_9_10,       0x0b },
 690
 691 { SYS_DVBS2,    PSK_8,  FEC_3_5,        0x0c },
 692 { SYS_DVBS2,    PSK_8,  FEC_2_3,        0x0d },
 693 { SYS_DVBS2,    PSK_8,  FEC_3_4,        0x0e },
 694 { SYS_DVBS2,    PSK_8,  FEC_5_6,        0x0f },
 695 { SYS_DVBS2,    PSK_8,  FEC_8_9,        0x10 },
 696 { SYS_DVBS2,    PSK_8,  FEC_9_10,       0x11 },
 697 };
 698
 699
 700 /* Retrieve current fec, modulation & pilot values */
 701 static int cx24120_get_fec(struct dvb_frontend *fe)
 702 {
 703         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 704         struct cx24120_state *state = fe->demodulator_priv;
 705         int idx;
 706         int ret;
 707         int GettedFEC;
 708
 709         dev_dbg(&state->i2c->dev, "%s()\n", __func__);
 710
 711         ret = cx24120_readreg(state, CX24120_REG_FECMODE);
 712         GettedFEC = ret & 0x3f;         /* Lower 6 bits */
 713
 714         dev_dbg(&state->i2c->dev, "%s: Get FEC: %d\n", __func__, GettedFEC);
 715
 716         for (idx = 0; idx < ARRAY_SIZE(modfec_lookup_table); idx++) {
 717                 if (modfec_lookup_table[idx].delsys != state->dcur.delsys)
 718                         continue;
 719                 if (modfec_lookup_table[idx].val != GettedFEC)
 720                         continue;
 721
 722                 break;  /* found */
 723         }
 724
 725         if (idx >= ARRAY_SIZE(modfec_lookup_table)) {
 726                 dev_dbg(&state->i2c->dev, "%s: Couldn't find fec!\n",
 727                         __func__);
 728                 return -EINVAL;
 729         }
 730
 731         /* save values back to cache */
 732         c->modulation = modfec_lookup_table[idx].mod;
 733         c->fec_inner = modfec_lookup_table[idx].fec;
 734         c->pilot = (ret & 0x80) ? PILOT_ON : PILOT_OFF;
 735
 736         dev_dbg(&state->i2c->dev,
 737                 "%s: mod(%d), fec(%d), pilot(%d)\n",
 738                 __func__,
 739                 c->modulation, c->fec_inner, c->pilot);
 740
 741         return 0;
 742 }
 743
 744
 745 /* Clock ratios lookup table
 746  *
 747  * Values obtained from much larger table in old driver
 748  * which had numerous entries which would never match.
 749  *
 750  * There's probably some way of calculating these but I
 751  * can't determine the pattern
 752 */
 753 static struct cx24120_clock_ratios_table {
 754         fe_delivery_system_t delsys;
 755         fe_pilot_t pilot;
 756         fe_modulation_t mod;
 757         fe_code_rate_t fec;
 758         u32 m_rat;
 759         u32 n_rat;
 760         u32 rate;
 761 } clock_ratios_table[] = {
 762 /*delsys        pilot           mod     fec             m_rat   n_rat   rate */
 763 { SYS_DVBS2,    PILOT_OFF,      QPSK,   FEC_1_2,        273088, 254505, 274 },
 764 { SYS_DVBS2,    PILOT_OFF,      QPSK,   FEC_3_5,        17272,  13395,  330 },
 765 { SYS_DVBS2,    PILOT_OFF,      QPSK,   FEC_2_3,        24344,  16967,  367 },
 766 { SYS_DVBS2,    PILOT_OFF,      QPSK,   FEC_3_4,        410788, 254505, 413 },
 767 { SYS_DVBS2,    PILOT_OFF,      QPSK,   FEC_4_5,        438328, 254505, 440 },
 768 { SYS_DVBS2,    PILOT_OFF,      QPSK,   FEC_5_6,        30464,  16967,  459 },
 769 { SYS_DVBS2,    PILOT_OFF,      QPSK,   FEC_8_9,        487832, 254505, 490 },
 770 { SYS_DVBS2,    PILOT_OFF,      QPSK,   FEC_9_10,       493952, 254505, 496 },
 771 { SYS_DVBS2,    PILOT_OFF,      PSK_8,  FEC_3_5,        328168, 169905, 494 },
 772 { SYS_DVBS2,    PILOT_OFF,      PSK_8,  FEC_2_3,        24344,  11327,  550 },
 773 { SYS_DVBS2,    PILOT_OFF,      PSK_8,  FEC_3_4,        410788, 169905, 618 },
 774 { SYS_DVBS2,    PILOT_OFF,      PSK_8,  FEC_5_6,        30464,  11327,  688 },
 775 { SYS_DVBS2,    PILOT_OFF,      PSK_8,  FEC_8_9,        487832, 169905, 735 },
 776 { SYS_DVBS2,    PILOT_OFF,      PSK_8,  FEC_9_10,       493952, 169905, 744 },
 777 { SYS_DVBS2,    PILOT_ON,       QPSK,   FEC_1_2,        273088, 260709, 268 },
 778 { SYS_DVBS2,    PILOT_ON,       QPSK,   FEC_3_5,        328168, 260709, 322 },
 779 { SYS_DVBS2,    PILOT_ON,       QPSK,   FEC_2_3,        121720, 86903,  358 },
 780 { SYS_DVBS2,    PILOT_ON,       QPSK,   FEC_3_4,        410788, 260709, 403 },
 781 { SYS_DVBS2,    PILOT_ON,       QPSK,   FEC_4_5,        438328, 260709, 430 },
 782 { SYS_DVBS2,    PILOT_ON,       QPSK,   FEC_5_6,        152320, 86903,  448 },
 783 { SYS_DVBS2,    PILOT_ON,       QPSK,   FEC_8_9,        487832, 260709, 479 },
 784 { SYS_DVBS2,    PILOT_ON,       QPSK,   FEC_9_10,       493952, 260709, 485 },
 785 { SYS_DVBS2,    PILOT_ON,       PSK_8,  FEC_3_5,        328168, 173853, 483 },
 786 { SYS_DVBS2,    PILOT_ON,       PSK_8,  FEC_2_3,        121720, 57951,  537 },
 787 { SYS_DVBS2,    PILOT_ON,       PSK_8,  FEC_3_4,        410788, 173853, 604 },
 788 { SYS_DVBS2,    PILOT_ON,       PSK_8,  FEC_5_6,        152320, 57951,  672 },
 789 { SYS_DVBS2,    PILOT_ON,       PSK_8,  FEC_8_9,        487832, 173853, 718 },
 790 { SYS_DVBS2,    PILOT_ON,       PSK_8,  FEC_9_10,       493952, 173853, 727 },
 791 { SYS_DVBS,     PILOT_OFF,      QPSK,   FEC_1_2,        152592, 152592, 256 },
 792 { SYS_DVBS,     PILOT_OFF,      QPSK,   FEC_2_3,        305184, 228888, 341 },
 793 { SYS_DVBS,     PILOT_OFF,      QPSK,   FEC_3_4,        457776, 305184, 384 },
 794 { SYS_DVBS,     PILOT_OFF,      QPSK,   FEC_5_6,        762960, 457776, 427 },
 795 { SYS_DVBS,     PILOT_OFF,      QPSK,   FEC_7_8,        1068144, 610368, 448 },
 796 };
 797
 798
 799 /* Set clock ratio from lookup table */
 800 static void cx24120_set_clock_ratios(struct dvb_frontend *fe)
 801 {
 802         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 803         struct cx24120_state *state = fe->demodulator_priv;
 804         struct cx24120_cmd cmd;
 805         int ret, idx;
 806
 807         /* Find fec, modulation, pilot */
 808         ret = cx24120_get_fec(fe);
 809         if (ret != 0)
 810                 return;
 811
 812         /* Find the clock ratios in the lookup table */
 813         for (idx = 0; idx < ARRAY_SIZE(clock_ratios_table); idx++) {
 814                 if (clock_ratios_table[idx].delsys != state->dcur.delsys)
 815                         continue;
 816                 if (clock_ratios_table[idx].mod != c->modulation)
 817                         continue;
 818                 if (clock_ratios_table[idx].fec != c->fec_inner)
 819                         continue;
 820                 if (clock_ratios_table[idx].pilot != c->pilot)
 821                         continue;
 822
 823                 break;          /* found */
 824         }
 825
 826         if (idx >= ARRAY_SIZE(clock_ratios_table)) {
 827                 info("Clock ratio not found - data reception in danger\n");
 828                 return;
 829         }
 830
 831
 832         /* Read current values? */
 833         cmd.id = CMD_CLOCK_READ;
 834         cmd.len = 1;
 835         cmd.arg[0] = 0x00;
 836         ret = cx24120_message_sendrcv(state, &cmd, 6);
 837         if (ret != 0)
 838                 return;
 839         /* in cmd[0]-[5] - result */
 840
 841         dev_dbg(&state->i2c->dev,
 842                 "%s: m=%d, n=%d; idx: %d m=%d, n=%d, rate=%d\n",
 843                 __func__,
 844                 cmd.arg[2] | (cmd.arg[1] << 8) | (cmd.arg[0] << 16),
 845                 cmd.arg[5] | (cmd.arg[4] << 8) | (cmd.arg[3] << 16),
 846                 idx,
 847                 clock_ratios_table[idx].m_rat,
 848                 clock_ratios_table[idx].n_rat,
 849                 clock_ratios_table[idx].rate);
 850
 851
 852
 853         /* Set the clock */
 854         cmd.id = CMD_CLOCK_SET;
 855         cmd.len = 10;
 856         cmd.arg[0] = 0;
 857         cmd.arg[1] = 0x10;
 858         cmd.arg[2] = (clock_ratios_table[idx].m_rat >> 16) & 0xff;
 859         cmd.arg[3] = (clock_ratios_table[idx].m_rat >>  8) & 0xff;
 860         cmd.arg[4] = (clock_ratios_table[idx].m_rat >>  0) & 0xff;
 861         cmd.arg[5] = (clock_ratios_table[idx].n_rat >> 16) & 0xff;
 862         cmd.arg[6] = (clock_ratios_table[idx].n_rat >>  8) & 0xff;
 863         cmd.arg[7] = (clock_ratios_table[idx].n_rat >>  0) & 0xff;
 864         cmd.arg[8] = (clock_ratios_table[idx].rate >> 8) & 0xff;
 865         cmd.arg[9] = (clock_ratios_table[idx].rate >> 0) & 0xff;
 866
 867         cx24120_message_send(state, &cmd);
 868
 869 }
 870
 871
 872 /* Set inversion value */
 873 static int cx24120_set_inversion(struct cx24120_state *state,
 874         fe_spectral_inversion_t inversion)
 875 {
 876         dev_dbg(&state->i2c->dev, "%s(%d)\n",
 877                 __func__, inversion);
 878
 879         switch (inversion) {
 880         case INVERSION_OFF:
 881                 state->dnxt.inversion_val = 0x00;
 882                 break;
 883         case INVERSION_ON:
 884                 state->dnxt.inversion_val = 0x04;
 885                 break;
 886         case INVERSION_AUTO:
 887                 state->dnxt.inversion_val = 0x0c;
 888                 break;
 889         default:
 890                 return -EINVAL;
 891         }
 892
 893         state->dnxt.inversion = inversion;
 894
 895         return 0;
 896 }
 897
 898 /* FEC lookup table for tuning
 899  * Some DVB-S2 val's have been found by trial
 900  * and error. Sofar it seems to match up with
 901  * the contents of the REG_FECMODE after tuning
 902  * The rest will probably be the same but would
 903  * need testing.
 904  * Anything not in the table will run with
 905  * FEC_AUTO and take a while longer to tune in
 906  * ( c.500ms instead of 30ms )
 907  */
 908 static struct cx24120_modfec_table {
 909         fe_delivery_system_t delsys;
 910         fe_modulation_t mod;
 911         fe_code_rate_t fec;
 912         u8 val;
 913 } modfec_table[] = {
 914 /*delsys        mod     fec      val */
 915 { SYS_DVBS,     QPSK,   FEC_1_2, 0x2e },
 916 { SYS_DVBS,     QPSK,   FEC_2_3, 0x2f },
 917 { SYS_DVBS,     QPSK,   FEC_3_4, 0x30 },
 918 { SYS_DVBS,     QPSK,   FEC_5_6, 0x31 },
 919 { SYS_DVBS,     QPSK,   FEC_6_7, 0x32 },
 920 { SYS_DVBS,     QPSK,   FEC_7_8, 0x33 },
 921
 922 { SYS_DVBS2,    QPSK,   FEC_3_4, 0x07 },
 923
 924 { SYS_DVBS2,    PSK_8,  FEC_2_3, 0x0d },
 925 { SYS_DVBS2,    PSK_8,  FEC_3_4, 0x0e },
 926 };
 927
 928 /* Set fec_val & fec_mask values from delsys, modulation & fec */
 929 static int cx24120_set_fec(struct cx24120_state *state,
 930         fe_modulation_t mod, fe_code_rate_t fec)
 931 {
 932         int idx;
 933
 934         dev_dbg(&state->i2c->dev,
 935                 "%s(0x%02x,0x%02x)\n", __func__, mod, fec);
 936
 937         state->dnxt.fec = fec;
 938
 939         /* Lookup fec_val from modfec table */
 940         for (idx = 0; idx < ARRAY_SIZE(modfec_table); idx++) {
 941                 if (modfec_table[idx].delsys != state->dnxt.delsys)
 942                         continue;
 943                 if (modfec_table[idx].mod != mod)
 944                         continue;
 945                 if (modfec_table[idx].fec != fec)
 946                         continue;
 947
 948                 /* found */
 949                 state->dnxt.fec_mask = 0x00;
 950                 state->dnxt.fec_val = modfec_table[idx].val;
 951                 return 0;
 952         }
 953
 954
 955         if (state->dnxt.delsys == SYS_DVBS2) {
 956                 /* DVBS2 auto is 0x00/0x00 */
 957                 state->dnxt.fec_mask = 0x00;
 958                 state->dnxt.fec_val  = 0x00;
 959         } else {
 960                 /* Set DVB-S to auto */
 961                 state->dnxt.fec_val  = 0x2e;
 962                 state->dnxt.fec_mask = 0xac;
 963         }
 964
 965         return 0;
 966 }
 967
 968
 969 /* Set pilot */
 970 static int cx24120_set_pilot(struct cx24120_state *state,
 971                 fe_pilot_t pilot) {
 972
 973         dev_dbg(&state->i2c->dev,
 974                 "%s(%d)\n", __func__, pilot);
 975
 976         /* Pilot only valid in DVBS2 */
 977         if (state->dnxt.delsys != SYS_DVBS2) {
 978                 state->dnxt.pilot_val = CX24120_PILOT_OFF;
 979                 return 0;
 980         }
 981
 982
 983         switch (pilot) {
 984         case PILOT_OFF:
 985                 state->dnxt.pilot_val = CX24120_PILOT_OFF;
 986                 break;
 987         case PILOT_ON:
 988                 state->dnxt.pilot_val = CX24120_PILOT_ON;
 989                 break;
 990         case PILOT_AUTO:
 991         default:
 992                 state->dnxt.pilot_val = CX24120_PILOT_AUTO;
 993         }
 994
 995         return 0;
 996 }
 997
 998 /* Set symbol rate */
 999 static int cx24120_set_symbolrate(struct cx24120_state *state, u32 rate)
1000 {
1001         dev_dbg(&state->i2c->dev, "%s(%d)\n",
1002                 __func__, rate);
1003
1004         state->dnxt.symbol_rate = rate;
1005
1006         /* Check symbol rate */
1007         if (rate  > 31000000) {
1008                 state->dnxt.clkdiv  = (-(rate < 31000001) & 3) + 2;
1009                 state->dnxt.ratediv = (-(rate < 31000001) & 6) + 4;
1010         } else {
1011                 state->dnxt.clkdiv  = 3;
1012                 state->dnxt.ratediv = 6;
1013         }
1014
1015         return 0;
1016 }
1017
1018
1019 /* Overwrite the current tuning params, we are about to tune */
1020 static void cx24120_clone_params(struct dvb_frontend *fe)
1021 {
1022         struct cx24120_state *state = fe->demodulator_priv;
1023
1024         state->dcur = state->dnxt;
1025 }
1026
1027
1028 /* Table of time to tune for different symrates */
1029 static struct cx24120_symrate_delay {
1030         fe_delivery_system_t delsys;
1031         u32 symrate;            /* Check for >= this symrate */
1032         u32 delay;              /* Timeout in ms */
1033 } symrates_delay_table[] = {
1034 { SYS_DVBS,     10000000,       400   },
1035 { SYS_DVBS,     8000000,        2000  },
1036 { SYS_DVBS,     6000000,        5000  },
1037 { SYS_DVBS,     3000000,        10000 },
1038 { SYS_DVBS,     0,              15000 },
1039 { SYS_DVBS2,    10000000,       600   }, /* DVBS2 needs a little longer */
1040 { SYS_DVBS2,    8000000,        2000  }, /* (so these might need bumping too) */
1041 { SYS_DVBS2,    6000000,        5000  },
1042 { SYS_DVBS2,    3000000,        10000 },
1043 { SYS_DVBS2,    0,              15000 },
1044 };
1045
1046
1047 static int cx24120_set_frontend(struct dvb_frontend *fe)
1048 {
1049         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1050         struct cx24120_state *state = fe->demodulator_priv;
1051         struct cx24120_cmd cmd;
1052         int ret;
1053         int delay_cnt, sd_idx = 0;
1054         fe_status_t status;
1055
1056         switch (c->delivery_system) {
1057         case SYS_DVBS2:
1058                 dev_dbg(&state->i2c->dev, "%s() DVB-S2\n",
1059                         __func__);
1060                 break;
1061         case SYS_DVBS:
1062                 dev_dbg(&state->i2c->dev, "%s() DVB-S\n",
1063                         __func__);
1064                 break;
1065         default:
1066                 dev_dbg(&state->i2c->dev,
1067                         "%s() Delivery system(%d) not supported\n",
1068                         __func__, c->delivery_system);
1069                 ret = -EINVAL;
1070                 break;
1071         }
1072
1073
1074         state->dnxt.delsys = c->delivery_system;
1075         state->dnxt.modulation = c->modulation;
1076         state->dnxt.frequency = c->frequency;
1077         state->dnxt.pilot = c->pilot;
1078
1079         ret = cx24120_set_inversion(state, c->inversion);
1080         if (ret !=  0)
1081                 return ret;
1082
1083         ret = cx24120_set_fec(state, c->modulation, c->fec_inner);
1084         if (ret !=  0)
1085                 return ret;
1086
1087         ret = cx24120_set_pilot(state, c->pilot);
1088         if (ret != 0)
1089                 return ret;
1090
1091         ret = cx24120_set_symbolrate(state, c->symbol_rate);
1092         if (ret !=  0)
1093                 return ret;
1094
1095
1096         /* discard the 'current' tuning parameters and prepare to tune */
1097         cx24120_clone_params(fe);
1098
1099         dev_dbg(&state->i2c->dev,
1100                 "%s: delsys      = %d\n", __func__, state->dcur.delsys);
1101         dev_dbg(&state->i2c->dev,
1102                 "%s: modulation  = %d\n", __func__, state->dcur.modulation);
1103         dev_dbg(&state->i2c->dev,
1104                 "%s: frequency   = %d\n", __func__, state->dcur.frequency);
1105         dev_dbg(&state->i2c->dev,
1106                 "%s: pilot       = %d (val = 0x%02x)\n", __func__,
1107                 state->dcur.pilot, state->dcur.pilot_val);
1108         dev_dbg(&state->i2c->dev,
1109                 "%s: symbol_rate = %d (clkdiv/ratediv = 0x%02x/0x%02x)\n",
1110                  __func__, state->dcur.symbol_rate,
1111                  state->dcur.clkdiv, state->dcur.ratediv);
1112         dev_dbg(&state->i2c->dev,
1113                 "%s: FEC         = %d (mask/val = 0x%02x/0x%02x)\n", __func__,
1114                 state->dcur.fec, state->dcur.fec_mask, state->dcur.fec_val);
1115         dev_dbg(&state->i2c->dev,
1116                 "%s: Inversion   = %d (val = 0x%02x)\n", __func__,
1117                 state->dcur.inversion, state->dcur.inversion_val);
1118
1119
1120
1121         /* Tune in */
1122         cmd.id = CMD_TUNEREQUEST;
1123         cmd.len = 15;
1124         cmd.arg[0] = 0;
1125         cmd.arg[1]  = (state->dcur.frequency & 0xff0000) >> 16;
1126         cmd.arg[2]  = (state->dcur.frequency & 0x00ff00) >> 8;
1127         cmd.arg[3]  = (state->dcur.frequency & 0x0000ff);
1128         cmd.arg[4]  = ((state->dcur.symbol_rate/1000) & 0xff00) >> 8;
1129         cmd.arg[5]  = ((state->dcur.symbol_rate/1000) & 0x00ff);
1130         cmd.arg[6]  = state->dcur.inversion;
1131         cmd.arg[7]  = state->dcur.fec_val | state->dcur.pilot_val;
1132         cmd.arg[8]  = CX24120_SEARCH_RANGE_KHZ >> 8;
1133         cmd.arg[9]  = CX24120_SEARCH_RANGE_KHZ & 0xff;
1134         cmd.arg[10] = 0;                /* maybe rolloff? */
1135         cmd.arg[11] = state->dcur.fec_mask;
1136         cmd.arg[12] = state->dcur.ratediv;
1137         cmd.arg[13] = state->dcur.clkdiv;
1138         cmd.arg[14] = 0;
1139
1140
1141         /* Send tune command */
1142         ret = cx24120_message_send(state, &cmd);
1143         if (ret != 0)
1144                 return ret;
1145
1146         /* Write symbol rate values */
1147         ret = cx24120_writereg(state, CX24120_REG_CLKDIV, state->dcur.clkdiv);
1148         ret = cx24120_readreg(state, CX24120_REG_RATEDIV);
1149         ret &= 0xfffffff0;
1150         ret |= state->dcur.ratediv;
1151         ret = cx24120_writereg(state, CX24120_REG_RATEDIV, ret);
1152
1153         /* Default time to tune */
1154         delay_cnt = 500;
1155
1156         /* Establish time to tune from symrates_delay_table */
1157         for (sd_idx = 0; sd_idx < ARRAY_SIZE(symrates_delay_table); sd_idx++) {
1158                 if (state->dcur.delsys != symrates_delay_table[sd_idx].delsys)
1159                         continue;
1160                 if (c->symbol_rate < symrates_delay_table[sd_idx].symrate)
1161                         continue;
1162
1163                 /* found */
1164                 delay_cnt = symrates_delay_table[sd_idx].delay;
1165                 dev_dbg(&state->i2c->dev, "%s: Found symrate delay = %d\n",
1166                         __func__, delay_cnt);
1167                 break;
1168         }
1169
1170         /* Wait for tuning */
1171         while (delay_cnt >= 0) {
1172                 cx24120_read_status(fe, &status);
1173                 if (status & FE_HAS_LOCK)
1174                         goto tuned;
1175                 msleep(20);
1176                 delay_cnt -= 20;
1177         }
1178
1179
1180         /* Fail to tune */
1181         dev_dbg(&state->i2c->dev, "%s: Tuning failed\n",
1182                 __func__);
1183
1184         return -EINVAL;
1185
1186
1187 tuned:
1188         dev_dbg(&state->i2c->dev, "%s: Tuning successful\n",
1189                 __func__);
1190
1191         /* Set clock ratios */
1192         cx24120_set_clock_ratios(fe);
1193
1194         /* Old driver would do a msleep(200) here */
1195
1196         /* Renable mpeg output */
1197         if (!state->mpeg_enabled)
1198                 cx24120_msg_mpeg_output_global_config(state, 1);
1199
1200         return 0;
1201 }
1202
1203
1204 /* Calculate vco from config */
1205 static u64 cx24120_calculate_vco(struct cx24120_state *state)
1206 {
1207         u32 vco;
1208         u64 inv_vco, res, xxyyzz;
1209         u32 xtal_khz = state->config->xtal_khz;
1210
1211         xxyyzz = 0x400000000ULL;
1212         vco = xtal_khz * 10 * 4;
1213         inv_vco = xxyyzz / vco;
1214         res = xxyyzz % vco;
1215
1216         if (inv_vco > xtal_khz * 10 * 2)
1217                 ++inv_vco;
1218
1219         dev_dbg(&state->i2c->dev,
1220                 "%s: xtal=%d, vco=%d, inv_vco=%lld, res=%lld\n",
1221                 __func__, xtal_khz, vco, inv_vco, res);
1222
1223         return inv_vco;
1224 }
1225
1226
1227 int cx24120_init(struct dvb_frontend *fe)
1228 {
1229         const struct firmware *fw;
1230         struct cx24120_state *state = fe->demodulator_priv;
1231         struct cx24120_cmd cmd;
1232         u8 ret, ret_EA, reg1;
1233         u64 inv_vco;
1234         int reset_result;
1235
1236         int i;
1237         unsigned char vers[4];
1238
1239         if (state->cold_init)
1240                 return 0;
1241
1242         /* ???? */
1243         ret = cx24120_writereg(state, 0xea, 0x00);
1244         ret = cx24120_test_rom(state);
1245         ret = cx24120_readreg(state, 0xfb) & 0xfe;
1246         ret = cx24120_writereg(state, 0xfb, ret);
1247         ret = cx24120_readreg(state, 0xfc) & 0xfe;
1248         ret = cx24120_writereg(state, 0xfc, ret);
1249         ret = cx24120_writereg(state, 0xc3, 0x04);
1250         ret = cx24120_writereg(state, 0xc4, 0x04);
1251         ret = cx24120_writereg(state, 0xce, 0x00);
1252         ret = cx24120_writereg(state, 0xcf, 0x00);
1253         ret_EA = cx24120_readreg(state, 0xea) & 0xfe;
1254         ret = cx24120_writereg(state, 0xea, ret_EA);
1255         ret = cx24120_writereg(state, 0xeb, 0x0c);
1256         ret = cx24120_writereg(state, 0xec, 0x06);
1257         ret = cx24120_writereg(state, 0xed, 0x05);
1258         ret = cx24120_writereg(state, 0xee, 0x03);
1259         ret = cx24120_writereg(state, 0xef, 0x05);
1260         ret = cx24120_writereg(state, 0xf3, 0x03);
1261         ret = cx24120_writereg(state, 0xf4, 0x44);
1262
1263         for (reg1 = 0xf0; reg1 < 0xf3; reg1++) {
1264                 cx24120_writereg(state, reg1, 0x04);
1265                 cx24120_writereg(state, reg1 - 10, 0x02);
1266         }
1267
1268         ret = cx24120_writereg(state, 0xea, (ret_EA | 0x01));
1269         for (reg1 = 0xc5; reg1 < 0xcb; reg1 += 2) {
1270                 ret = cx24120_writereg(state, reg1, 0x00);
1271                 ret = cx24120_writereg(state, reg1 + 1, 0x00);
1272         }
1273
1274         ret = cx24120_writereg(state, 0xe4, 0x03);
1275         ret = cx24120_writereg(state, 0xeb, 0x0a);
1276
1277         dev_dbg(&state->i2c->dev,
1278                 "%s: Requesting firmware (%s) to download...\n",
1279                 __func__, CX24120_FIRMWARE);
1280
1281         ret = state->config->request_firmware(fe, &fw, CX24120_FIRMWARE);
1282         if (ret) {
1283                 err("Could not load firmware (%s): %d\n",
1284                         CX24120_FIRMWARE, ret);
1285                 return ret;
1286         }
1287
1288         dev_dbg(&state->i2c->dev,
1289                 "%s: Firmware found, size %d bytes (%02x %02x .. %02x %02x)\n",
1290                 __func__,
1291                 (int)fw->size,                  /* firmware_size in bytes */
1292                 fw->data[0],                    /* fw 1st byte */
1293                 fw->data[1],                    /* fw 2d byte */
1294                 fw->data[fw->size - 2],         /* fw before last byte */
1295                 fw->data[fw->size - 1]);        /* fw last byte */
1296
1297         ret = cx24120_test_rom(state);
1298         ret = cx24120_readreg(state, 0xfb) & 0xfe;
1299         ret = cx24120_writereg(state, 0xfb, ret);
1300         ret = cx24120_writereg(state, 0xe0, 0x76);
1301         ret = cx24120_writereg(state, 0xf7, 0x81);
1302         ret = cx24120_writereg(state, 0xf8, 0x00);
1303         ret = cx24120_writereg(state, 0xf9, 0x00);
1304         ret = cx24120_writeregN(state, 0xfa, fw->data, (fw->size - 1), 0x00);
1305         ret = cx24120_writereg(state, 0xf7, 0xc0);
1306         ret = cx24120_writereg(state, 0xe0, 0x00);
1307         ret = (fw->size - 2) & 0x00ff;
1308         ret = cx24120_writereg(state, 0xf8, ret);
1309         ret = ((fw->size - 2) >> 8) & 0x00ff;
1310         ret = cx24120_writereg(state, 0xf9, ret);
1311         ret = cx24120_writereg(state, 0xf7, 0x00);
1312         ret = cx24120_writereg(state, 0xdc, 0x00);
1313         ret = cx24120_writereg(state, 0xdc, 0x07);
1314         msleep(500);
1315
1316         /* Check final byte matches final byte of firmware */
1317         ret = cx24120_readreg(state, 0xe1);
1318         if (ret == fw->data[fw->size - 1]) {
1319                 dev_dbg(&state->i2c->dev,
1320                         "%s: Firmware uploaded successfully\n",
1321                         __func__);
1322                 reset_result = 0;
1323         } else {
1324                 err("Firmware upload failed. Last byte returned=0x%x\n", ret);
1325                 reset_result = -EREMOTEIO;
1326         }
1327         ret = cx24120_writereg(state, 0xdc, 0x00);
1328         release_firmware(fw);
1329         if (reset_result != 0)
1330                 return reset_result;
1331
1332
1333         /* Start tuner */
1334         cmd.id = CMD_START_TUNER;
1335         cmd.len = 3;
1336         cmd.arg[0] = 0x00;
1337         cmd.arg[1] = 0x00;
1338         cmd.arg[2] = 0x00;
1339
1340         if (cx24120_message_send(state, &cmd) != 0) {
1341                 err("Error tuner start! :(\n");
1342                 return -EREMOTEIO;
1343         }
1344
1345         /* Set VCO */
1346         inv_vco = cx24120_calculate_vco(state);
1347
1348         cmd.id = CMD_VCO_SET;
1349         cmd.len = 12;
1350         cmd.arg[0] = 0x06;
1351         cmd.arg[1] = 0x2b;
1352         cmd.arg[2] = 0xd8;
1353         cmd.arg[3] = (inv_vco >> 8) & 0xff;
1354         cmd.arg[4] = (inv_vco) & 0xff;
1355         cmd.arg[5] = 0x03;
1356         cmd.arg[6] = 0x9d;
1357         cmd.arg[7] = 0xfc;
1358         cmd.arg[8] = 0x06;
1359         cmd.arg[9] = 0x03;
1360         cmd.arg[10] = 0x27;
1361         cmd.arg[11] = 0x7f;
1362
1363         if (cx24120_message_send(state, &cmd)) {
1364                 err("Error set VCO! :(\n");
1365                 return -EREMOTEIO;
1366         }
1367
1368
1369         /* set bandwidth */
1370         cmd.id = CMD_BANDWIDTH;
1371         cmd.len = 12;
1372         cmd.arg[0] = 0x00;
1373         cmd.arg[1] = 0x00;
1374         cmd.arg[2] = 0x00;
1375         cmd.arg[3] = 0x00;
1376         cmd.arg[4] = 0x05;
1377         cmd.arg[5] = 0x02;
1378         cmd.arg[6] = 0x02;
1379         cmd.arg[7] = 0x00;
1380         cmd.arg[8] = 0x05;
1381         cmd.arg[9] = 0x02;
1382         cmd.arg[10] = 0x02;
1383         cmd.arg[11] = 0x00;
1384
1385         if (cx24120_message_send(state, &cmd)) {
1386                 err("Error set bandwidth!\n");
1387                 return -EREMOTEIO;
1388         }
1389
1390         ret = cx24120_readreg(state, 0xba);
1391         if (ret > 3) {
1392                 dev_dbg(&state->i2c->dev, "%s: Reset-readreg 0xba: %x\n",
1393                         __func__, ret);
1394                 err("Error initialising tuner!\n");
1395                 return -EREMOTEIO;
1396         }
1397
1398         dev_dbg(&state->i2c->dev, "%s: Tuner initialised correctly.\n",
1399                         __func__);
1400
1401
1402         /* Initialise mpeg outputs */
1403         ret = cx24120_writereg(state, 0xeb, 0x0a);
1404         if (cx24120_msg_mpeg_output_global_config(state, 0) ||
1405             cx24120_msg_mpeg_output_config(state, 0) ||
1406             cx24120_msg_mpeg_output_config(state, 1) ||
1407             cx24120_msg_mpeg_output_config(state, 2)) {
1408                 err("Error initialising mpeg output. :(\n");
1409                 return -EREMOTEIO;
1410         }
1411
1412
1413         /* ???? */
1414         cmd.id = CMD_TUNER_INIT;
1415         cmd.len = 3;
1416         cmd.arg[0] = 0x00;
1417         cmd.arg[1] = 0x10;
1418         cmd.arg[2] = 0x10;
1419         if (cx24120_message_send(state, &cmd)) {
1420                 err("Error sending final init message. :(\n");
1421                 return -EREMOTEIO;
1422         }
1423
1424
1425         /* Firmware CMD 35: Get firmware version */
1426         cmd.id = CMD_FWVERSION;
1427         cmd.len = 1;
1428         for (i = 0; i < 4; i++) {
1429                 cmd.arg[0] = i;
1430                 ret = cx24120_message_send(state, &cmd);
1431                 if (ret != 0)
1432                         return ret;
1433                 vers[i] = cx24120_readreg(state, CX24120_REG_MAILBOX);
1434         }
1435         info("FW version %i.%i.%i.%i\n", vers[0], vers[1], vers[2], vers[3]);
1436
1437
1438         state->cold_init = 1;
1439         return 0;
1440 }
1441
1442
1443 static int cx24120_tune(struct dvb_frontend *fe, bool re_tune,
1444         unsigned int mode_flags, unsigned int *delay, fe_status_t *status)
1445 {
1446         struct cx24120_state *state = fe->demodulator_priv;
1447         int ret;
1448
1449         dev_dbg(&state->i2c->dev, "%s(%d)\n", __func__, re_tune);
1450
1451         /* TODO: Do we need to set delay? */
1452
1453         if (re_tune) {
1454                 ret = cx24120_set_frontend(fe);
1455                 if (ret)
1456                         return ret;
1457         }
1458
1459         return cx24120_read_status(fe, status);
1460 }
1461
1462
1463
1464 static int cx24120_get_algo(struct dvb_frontend *fe)
1465 {
1466         return DVBFE_ALGO_HW;
1467 }
1468
1469
1470 static int cx24120_sleep(struct dvb_frontend *fe)
1471 {
1472         return 0;
1473 }
1474
1475
1476 /*static int cx24120_wakeup(struct dvb_frontend *fe)
1477  * {
1478  *   return 0;
1479  * }
1480 */
1481
1482
1483 static int cx24120_get_frontend(struct dvb_frontend *fe)
1484 {
1485         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1486         struct cx24120_state *state = fe->demodulator_priv;
1487         u8 freq1, freq2, freq3;
1488
1489         dev_dbg(&state->i2c->dev, "%s()", __func__);
1490
1491         /* don't return empty data if we're not tuned in */
1492         if (state->mpeg_enabled)
1493                 return 0;
1494
1495         /* Get frequency */
1496         freq1 = cx24120_readreg(state, CX24120_REG_FREQ1);
1497         freq2 = cx24120_readreg(state, CX24120_REG_FREQ2);
1498         freq3 = cx24120_readreg(state, CX24120_REG_FREQ3);
1499         c->frequency = (freq3 << 16) | (freq2 << 8) | freq1;
1500         dev_dbg(&state->i2c->dev, "%s frequency = %d\n", __func__,
1501                 c->frequency);
1502
1503         /* Get modulation, fec, pilot */
1504         cx24120_get_fec(fe);
1505
1506         return 0;
1507 }
1508
1509
1510 static void cx24120_release(struct dvb_frontend *fe)
1511 {
1512         struct cx24120_state *state = fe->demodulator_priv;
1513
1514         dev_dbg(&state->i2c->dev, "%s: Clear state structure\n", __func__);
1515         kfree(state);
1516 }
1517
1518
1519 static int cx24120_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
1520 {
1521         struct cx24120_state *state = fe->demodulator_priv;
1522
1523         *ucblocks = (cx24120_readreg(state, CX24120_REG_UCB_H) << 8) |
1524                      cx24120_readreg(state, CX24120_REG_UCB_L);
1525
1526         dev_dbg(&state->i2c->dev, "%s: Blocks = %d\n",
1527                         __func__, *ucblocks);
1528         return 0;
1529 }
1530
1531
1532 static struct dvb_frontend_ops cx24120_ops = {
1533         .delsys = { SYS_DVBS, SYS_DVBS2 },
1534         .info = {
1535                 .name = "Conexant CX24120/CX24118",
1536                 .frequency_min = 950000,
1537                 .frequency_max = 2150000,
1538                 .frequency_stepsize = 1011, /* kHz for QPSK frontends */
1539                 .frequency_tolerance = 5000,
1540                 .symbol_rate_min = 1000000,
1541                 .symbol_rate_max = 45000000,
1542                 .caps = FE_CAN_INVERSION_AUTO |
1543                         FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
1544                         FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
1545                         FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
1546                         FE_CAN_2G_MODULATION |
1547                         FE_CAN_QPSK | FE_CAN_RECOVER
1548         },
1549         .release =                      cx24120_release,
1550
1551         .init =                         cx24120_init,
1552         .sleep =                        cx24120_sleep,
1553
1554         .tune =                         cx24120_tune,
1555         .get_frontend_algo =            cx24120_get_algo,
1556         .set_frontend =                 cx24120_set_frontend,
1557
1558         .get_frontend =                 cx24120_get_frontend,
1559         .read_status =                  cx24120_read_status,
1560         .read_ber =                     cx24120_read_ber,
1561         .read_signal_strength =         cx24120_read_signal_strength,
1562         .read_snr =                     cx24120_read_snr,
1563         .read_ucblocks =                cx24120_read_ucblocks,
1564
1565         .diseqc_send_master_cmd =       cx24120_send_diseqc_msg,
1566
1567         .diseqc_send_burst =            cx24120_diseqc_send_burst,
1568         .set_tone =                     cx24120_set_tone,
1569         .set_voltage =                  cx24120_set_voltage,
1570 };
1571
1572 MODULE_DESCRIPTION("DVB Frontend module for Conexant CX24120/CX24118 hardware");
1573 MODULE_AUTHOR("Jemma Denson");
1574 MODULE_LICENSE("GPL");