drivers/media/tuners/fc0011.c

   1 /*
   2  * Fitipower FC0011 tuner driver
   3  *
   4  * Copyright (C) 2012 Michael Buesch <m@bues.ch>
   5  *
   6  * Derived from FC0012 tuner driver:
   7  * Copyright (C) 2012 Hans-Frieder Vogt <hfvogt@gmx.net>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  */
  23
  24 #include "fc0011.h"
  25
  26
  27 /* Tuner registers */
  28 enum {
  29         FC11_REG_0,
  30         FC11_REG_FA,            /* FA */
  31         FC11_REG_FP,            /* FP */
  32         FC11_REG_XINHI,         /* XIN high 8 bit */
  33         FC11_REG_XINLO,         /* XIN low 8 bit */
  34         FC11_REG_VCO,           /* VCO */
  35         FC11_REG_VCOSEL,        /* VCO select */
  36         FC11_REG_7,             /* Unknown tuner reg 7 */
  37         FC11_REG_8,             /* Unknown tuner reg 8 */
  38         FC11_REG_9,
  39         FC11_REG_10,            /* Unknown tuner reg 10 */
  40         FC11_REG_11,            /* Unknown tuner reg 11 */
  41         FC11_REG_12,
  42         FC11_REG_RCCAL,         /* RC calibrate */
  43         FC11_REG_VCOCAL,        /* VCO calibrate */
  44         FC11_REG_15,
  45         FC11_REG_16,            /* Unknown tuner reg 16 */
  46         FC11_REG_17,
  47
  48         FC11_NR_REGS,           /* Number of registers */
  49 };
  50
  51 enum FC11_REG_VCOSEL_bits {
  52         FC11_VCOSEL_2           = 0x08, /* VCO select 2 */
  53         FC11_VCOSEL_1           = 0x10, /* VCO select 1 */
  54         FC11_VCOSEL_CLKOUT      = 0x20, /* Fix clock out */
  55         FC11_VCOSEL_BW7M        = 0x40, /* 7MHz bw */
  56         FC11_VCOSEL_BW6M        = 0x80, /* 6MHz bw */
  57 };
  58
  59 enum FC11_REG_RCCAL_bits {
  60         FC11_RCCAL_FORCE        = 0x10, /* force */
  61 };
  62
  63 enum FC11_REG_VCOCAL_bits {
  64         FC11_VCOCAL_RUN         = 0,    /* VCO calibration run */
  65         FC11_VCOCAL_VALUEMASK   = 0x3F, /* VCO calibration value mask */
  66         FC11_VCOCAL_OK          = 0x40, /* VCO calibration Ok */
  67         FC11_VCOCAL_RESET       = 0x80, /* VCO calibration reset */
  68 };
  69
  70
  71 struct fc0011_priv {
  72         struct i2c_adapter *i2c;
  73         u8 addr;
  74
  75         u32 frequency;
  76         u32 bandwidth;
  77 };
  78
  79
  80 static int fc0011_writereg(struct fc0011_priv *priv, u8 reg, u8 val)
  81 {
  82         u8 buf[2] = { reg, val };
  83         struct i2c_msg msg = { .addr = priv->addr,
  84                 .flags = 0, .buf = buf, .len = 2 };
  85
  86         if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
  87                 dev_err(&priv->i2c->dev,
  88                         "I2C write reg failed, reg: %02x, val: %02x\n",
  89                         reg, val);
  90                 return -EIO;
  91         }
  92
  93         return 0;
  94 }
  95
  96 static int fc0011_readreg(struct fc0011_priv *priv, u8 reg, u8 *val)
  97 {
  98         u8 dummy;
  99         struct i2c_msg msg[2] = {
 100                 { .addr = priv->addr,
 101                   .flags = 0, .buf = &reg, .len = 1 },
 102                 { .addr = priv->addr,
 103                   .flags = I2C_M_RD, .buf = val ? : &dummy, .len = 1 },
 104         };
 105
 106         if (i2c_transfer(priv->i2c, msg, 2) != 2) {
 107                 dev_err(&priv->i2c->dev,
 108                         "I2C read failed, reg: %02x\n", reg);
 109                 return -EIO;
 110         }
 111
 112         return 0;
 113 }
 114
 115 static int fc0011_release(struct dvb_frontend *fe)
 116 {
 117         kfree(fe->tuner_priv);
 118         fe->tuner_priv = NULL;
 119
 120         return 0;
 121 }
 122
 123 static int fc0011_init(struct dvb_frontend *fe)
 124 {
 125         struct fc0011_priv *priv = fe->tuner_priv;
 126         int err;
 127
 128         if (WARN_ON(!fe->callback))
 129                 return -EINVAL;
 130
 131         err = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER,
 132                            FC0011_FE_CALLBACK_POWER, priv->addr);
 133         if (err) {
 134                 dev_err(&priv->i2c->dev, "Power-on callback failed\n");
 135                 return err;
 136         }
 137         err = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER,
 138                            FC0011_FE_CALLBACK_RESET, priv->addr);
 139         if (err) {
 140                 dev_err(&priv->i2c->dev, "Reset callback failed\n");
 141                 return err;
 142         }
 143
 144         return 0;
 145 }
 146
 147 /* Initiate VCO calibration */
 148 static int fc0011_vcocal_trigger(struct fc0011_priv *priv)
 149 {
 150         int err;
 151
 152         err = fc0011_writereg(priv, FC11_REG_VCOCAL, FC11_VCOCAL_RESET);
 153         if (err)
 154                 return err;
 155         err = fc0011_writereg(priv, FC11_REG_VCOCAL, FC11_VCOCAL_RUN);
 156         if (err)
 157                 return err;
 158
 159         return 0;
 160 }
 161
 162 /* Read VCO calibration value */
 163 static int fc0011_vcocal_read(struct fc0011_priv *priv, u8 *value)
 164 {
 165         int err;
 166
 167         err = fc0011_writereg(priv, FC11_REG_VCOCAL, FC11_VCOCAL_RUN);
 168         if (err)
 169                 return err;
 170         usleep_range(10000, 20000);
 171         err = fc0011_readreg(priv, FC11_REG_VCOCAL, value);
 172         if (err)
 173                 return err;
 174
 175         return 0;
 176 }
 177
 178 static int fc0011_set_params(struct dvb_frontend *fe)
 179 {
 180         struct dtv_frontend_properties *p = &fe->dtv_property_cache;
 181         struct fc0011_priv *priv = fe->tuner_priv;
 182         int err;
 183         unsigned int i, vco_retries;
 184         u32 freq = p->frequency / 1000;
 185         u32 bandwidth = p->bandwidth_hz / 1000;
 186         u32 fvco, xin, xdiv, xdivr;
 187         u16 frac;
 188         u8 fa, fp, vco_sel, vco_cal;
 189         u8 regs[FC11_NR_REGS] = { };
 190
 191         regs[FC11_REG_7] = 0x0F;
 192         regs[FC11_REG_8] = 0x3E;
 193         regs[FC11_REG_10] = 0xB8;
 194         regs[FC11_REG_11] = 0x80;
 195         regs[FC11_REG_RCCAL] = 0x04;
 196         err = fc0011_writereg(priv, FC11_REG_7, regs[FC11_REG_7]);
 197         err |= fc0011_writereg(priv, FC11_REG_8, regs[FC11_REG_8]);
 198         err |= fc0011_writereg(priv, FC11_REG_10, regs[FC11_REG_10]);
 199         err |= fc0011_writereg(priv, FC11_REG_11, regs[FC11_REG_11]);
 200         err |= fc0011_writereg(priv, FC11_REG_RCCAL, regs[FC11_REG_RCCAL]);
 201         if (err)
 202                 return -EIO;
 203
 204         /* Set VCO freq and VCO div */
 205         if (freq < 54000) {
 206                 fvco = freq * 64;
 207                 regs[FC11_REG_VCO] = 0x82;
 208         } else if (freq < 108000) {
 209                 fvco = freq * 32;
 210                 regs[FC11_REG_VCO] = 0x42;
 211         } else if (freq < 216000) {
 212                 fvco = freq * 16;
 213                 regs[FC11_REG_VCO] = 0x22;
 214         } else if (freq < 432000) {
 215                 fvco = freq * 8;
 216                 regs[FC11_REG_VCO] = 0x12;
 217         } else {
 218                 fvco = freq * 4;
 219                 regs[FC11_REG_VCO] = 0x0A;
 220         }
 221
 222         /* Calc XIN. The PLL reference frequency is 18 MHz. */
 223         xdiv = fvco / 18000;
 224         frac = fvco - xdiv * 18000;
 225         frac = (frac << 15) / 18000;
 226         if (frac >= 16384)
 227                 frac += 32786;
 228         if (!frac)
 229                 xin = 0;
 230         else if (frac < 511)
 231                 xin = 512;
 232         else if (frac < 65026)
 233                 xin = frac;
 234         else
 235                 xin = 65024;
 236         regs[FC11_REG_XINHI] = xin >> 8;
 237         regs[FC11_REG_XINLO] = xin;
 238
 239         /* Calc FP and FA */
 240         xdivr = xdiv;
 241         if (fvco - xdiv * 18000 >= 9000)
 242                 xdivr += 1; /* round */
 243         fp = xdivr / 8;
 244         fa = xdivr - fp * 8;
 245         if (fa < 2) {
 246                 fp -= 1;
 247                 fa += 8;
 248         }
 249         if (fp > 0x1F) {
 250                 fp &= 0x1F;
 251                 fa &= 0xF;
 252         }
 253         if (fa >= fp) {
 254                 dev_warn(&priv->i2c->dev,
 255                          "fa %02X >= fp %02X, but trying to continue\n",
 256                          (unsigned int)(u8)fa, (unsigned int)(u8)fp);
 257         }
 258         regs[FC11_REG_FA] = fa;
 259         regs[FC11_REG_FP] = fp;
 260
 261         /* Select bandwidth */
 262         switch (bandwidth) {
 263         case 8000:
 264                 break;
 265         case 7000:
 266                 regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_BW7M;
 267                 break;
 268         default:
 269                 dev_warn(&priv->i2c->dev, "Unsupported bandwidth %u kHz. "
 270                          "Using 6000 kHz.\n",
 271                          bandwidth);
 272                 bandwidth = 6000;
 273                 /* fallthrough */
 274         case 6000:
 275                 regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_BW6M;
 276                 break;
 277         }
 278
 279         /* Pre VCO select */
 280         if (fvco < 2320000) {
 281                 vco_sel = 0;
 282                 regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);
 283         } else if (fvco < 3080000) {
 284                 vco_sel = 1;
 285                 regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);
 286                 regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_1;
 287         } else {
 288                 vco_sel = 2;
 289                 regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);
 290                 regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_2;
 291         }
 292
 293         /* Fix for low freqs */
 294         if (freq < 45000) {
 295                 regs[FC11_REG_FA] = 0x6;
 296                 regs[FC11_REG_FP] = 0x11;
 297         }
 298
 299         /* Clock out fix */
 300         regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_CLKOUT;
 301
 302         /* Write the cached registers */
 303         for (i = FC11_REG_FA; i <= FC11_REG_VCOSEL; i++) {
 304                 err = fc0011_writereg(priv, i, regs[i]);
 305                 if (err)
 306                         return err;
 307         }
 308
 309         /* VCO calibration */
 310         err = fc0011_vcocal_trigger(priv);
 311         if (err)
 312                 return err;
 313         err = fc0011_vcocal_read(priv, &vco_cal);
 314         if (err)
 315                 return err;
 316         vco_retries = 0;
 317         while (!(vco_cal & FC11_VCOCAL_OK) && vco_retries < 3) {
 318                 /* Reset the tuner and try again */
 319                 err = fe->callback(priv->i2c, DVB_FRONTEND_COMPONENT_TUNER,
 320                                    FC0011_FE_CALLBACK_RESET, priv->addr);
 321                 if (err) {
 322                         dev_err(&priv->i2c->dev, "Failed to reset tuner\n");
 323                         return err;
 324                 }
 325                 /* Reinit tuner config */
 326                 err = 0;
 327                 for (i = FC11_REG_FA; i <= FC11_REG_VCOSEL; i++)
 328                         err |= fc0011_writereg(priv, i, regs[i]);
 329                 err |= fc0011_writereg(priv, FC11_REG_7, regs[FC11_REG_7]);
 330                 err |= fc0011_writereg(priv, FC11_REG_8, regs[FC11_REG_8]);
 331                 err |= fc0011_writereg(priv, FC11_REG_10, regs[FC11_REG_10]);
 332                 err |= fc0011_writereg(priv, FC11_REG_11, regs[FC11_REG_11]);
 333                 err |= fc0011_writereg(priv, FC11_REG_RCCAL, regs[FC11_REG_RCCAL]);
 334                 if (err)
 335                         return -EIO;
 336                 /* VCO calibration */
 337                 err = fc0011_vcocal_trigger(priv);
 338                 if (err)
 339                         return err;
 340                 err = fc0011_vcocal_read(priv, &vco_cal);
 341                 if (err)
 342                         return err;
 343                 vco_retries++;
 344         }
 345         if (!(vco_cal & FC11_VCOCAL_OK)) {
 346                 dev_err(&priv->i2c->dev,
 347                         "Failed to read VCO calibration value (got %02X)\n",
 348                         (unsigned int)vco_cal);
 349                 return -EIO;
 350         }
 351         vco_cal &= FC11_VCOCAL_VALUEMASK;
 352
 353         switch (vco_sel) {
 354         case 0:
 355                 if (vco_cal < 8) {
 356                         regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);
 357                         regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_1;
 358                         err = fc0011_writereg(priv, FC11_REG_VCOSEL,
 359                                               regs[FC11_REG_VCOSEL]);
 360                         if (err)
 361                                 return err;
 362                         err = fc0011_vcocal_trigger(priv);
 363                         if (err)
 364                                 return err;
 365                 } else {
 366                         regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);
 367                         err = fc0011_writereg(priv, FC11_REG_VCOSEL,
 368                                               regs[FC11_REG_VCOSEL]);
 369                         if (err)
 370                                 return err;
 371                 }
 372                 break;
 373         case 1:
 374                 if (vco_cal < 5) {
 375                         regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);
 376                         regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_2;
 377                         err = fc0011_writereg(priv, FC11_REG_VCOSEL,
 378                                               regs[FC11_REG_VCOSEL]);
 379                         if (err)
 380                                 return err;
 381                         err = fc0011_vcocal_trigger(priv);
 382                         if (err)
 383                                 return err;
 384                 } else if (vco_cal <= 48) {
 385                         regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);
 386                         regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_1;
 387                         err = fc0011_writereg(priv, FC11_REG_VCOSEL,
 388                                               regs[FC11_REG_VCOSEL]);
 389                         if (err)
 390                                 return err;
 391                 } else {
 392                         regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);
 393                         err = fc0011_writereg(priv, FC11_REG_VCOSEL,
 394                                               regs[FC11_REG_VCOSEL]);
 395                         if (err)
 396                                 return err;
 397                         err = fc0011_vcocal_trigger(priv);
 398                         if (err)
 399                                 return err;
 400                 }
 401                 break;
 402         case 2:
 403                 if (vco_cal > 53) {
 404                         regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);
 405                         regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_1;
 406                         err = fc0011_writereg(priv, FC11_REG_VCOSEL,
 407                                               regs[FC11_REG_VCOSEL]);
 408                         if (err)
 409                                 return err;
 410                         err = fc0011_vcocal_trigger(priv);
 411                         if (err)
 412                                 return err;
 413                 } else {
 414                         regs[FC11_REG_VCOSEL] &= ~(FC11_VCOSEL_1 | FC11_VCOSEL_2);
 415                         regs[FC11_REG_VCOSEL] |= FC11_VCOSEL_2;
 416                         err = fc0011_writereg(priv, FC11_REG_VCOSEL,
 417                                               regs[FC11_REG_VCOSEL]);
 418                         if (err)
 419                                 return err;
 420                 }
 421                 break;
 422         }
 423         err = fc0011_vcocal_read(priv, NULL);
 424         if (err)
 425                 return err;
 426         usleep_range(10000, 50000);
 427
 428         err = fc0011_readreg(priv, FC11_REG_RCCAL, &regs[FC11_REG_RCCAL]);
 429         if (err)
 430                 return err;
 431         regs[FC11_REG_RCCAL] |= FC11_RCCAL_FORCE;
 432         err = fc0011_writereg(priv, FC11_REG_RCCAL, regs[FC11_REG_RCCAL]);
 433         if (err)
 434                 return err;
 435         err = fc0011_writereg(priv, FC11_REG_16, 0xB);
 436         if (err)
 437                 return err;
 438
 439         dev_dbg(&priv->i2c->dev, "Tuned to "
 440                 "fa=%02X fp=%02X xin=%02X%02X vco=%02X vcosel=%02X "
 441                 "vcocal=%02X(%u) bw=%u\n",
 442                 (unsigned int)regs[FC11_REG_FA],
 443                 (unsigned int)regs[FC11_REG_FP],
 444                 (unsigned int)regs[FC11_REG_XINHI],
 445                 (unsigned int)regs[FC11_REG_XINLO],
 446                 (unsigned int)regs[FC11_REG_VCO],
 447                 (unsigned int)regs[FC11_REG_VCOSEL],
 448                 (unsigned int)vco_cal, vco_retries,
 449                 (unsigned int)bandwidth);
 450
 451         priv->frequency = p->frequency;
 452         priv->bandwidth = p->bandwidth_hz;
 453
 454         return 0;
 455 }
 456
 457 static int fc0011_get_frequency(struct dvb_frontend *fe, u32 *frequency)
 458 {
 459         struct fc0011_priv *priv = fe->tuner_priv;
 460
 461         *frequency = priv->frequency;
 462
 463         return 0;
 464 }
 465
 466 static int fc0011_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
 467 {
 468         *frequency = 0;
 469
 470         return 0;
 471 }
 472
 473 static int fc0011_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
 474 {
 475         struct fc0011_priv *priv = fe->tuner_priv;
 476
 477         *bandwidth = priv->bandwidth;
 478
 479         return 0;
 480 }
 481
 482 static const struct dvb_tuner_ops fc0011_tuner_ops = {
 483         .info = {
 484                 .name           = "Fitipower FC0011",
 485
 486                 .frequency_min  = 45000000,
 487                 .frequency_max  = 1000000000,
 488         },
 489
 490         .release                = fc0011_release,
 491         .init                   = fc0011_init,
 492
 493         .set_params             = fc0011_set_params,
 494
 495         .get_frequency          = fc0011_get_frequency,
 496         .get_if_frequency       = fc0011_get_if_frequency,
 497         .get_bandwidth          = fc0011_get_bandwidth,
 498 };
 499
 500 struct dvb_frontend *fc0011_attach(struct dvb_frontend *fe,
 501                                    struct i2c_adapter *i2c,
 502                                    const struct fc0011_config *config)
 503 {
 504         struct fc0011_priv *priv;
 505
 506         priv = kzalloc(sizeof(struct fc0011_priv), GFP_KERNEL);
 507         if (!priv)
 508                 return NULL;
 509
 510         priv->i2c = i2c;
 511         priv->addr = config->i2c_address;
 512
 513         fe->tuner_priv = priv;
 514         fe->ops.tuner_ops = fc0011_tuner_ops;
 515
 516         dev_info(&priv->i2c->dev, "Fitipower FC0011 tuner attached\n");
 517
 518         return fe;
 519 }
 520 EXPORT_SYMBOL(fc0011_attach);
 521
 522 MODULE_DESCRIPTION("Fitipower FC0011 silicon tuner driver");
 523 MODULE_AUTHOR("Michael Buesch <m@bues.ch>");
 524 MODULE_LICENSE("GPL");