drivers/media/tuners/qt1010.c

   1 /*
   2  *  Driver for Quantek QT1010 silicon tuner
   3  *
   4  *  Copyright (C) 2006 Antti Palosaari <crope@iki.fi>
   5  *                     Aapo Tahkola <aet@rasterburn.org>
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21 #include "qt1010.h"
  22 #include "qt1010_priv.h"
  23
  24 /* read single register */
  25 static int qt1010_readreg(struct qt1010_priv *priv, u8 reg, u8 *val)
  26 {
  27         struct i2c_msg msg[2] = {
  28                 { .addr = priv->cfg->i2c_address,
  29                   .flags = 0, .buf = &reg, .len = 1 },
  30                 { .addr = priv->cfg->i2c_address,
  31                   .flags = I2C_M_RD, .buf = val, .len = 1 },
  32         };
  33
  34         if (i2c_transfer(priv->i2c, msg, 2) != 2) {
  35                 dev_warn(&priv->i2c->dev, "%s: i2c rd failed reg=%02x\n",
  36                                 KBUILD_MODNAME, reg);
  37                 return -EREMOTEIO;
  38         }
  39         return 0;
  40 }
  41
  42 /* write single register */
  43 static int qt1010_writereg(struct qt1010_priv *priv, u8 reg, u8 val)
  44 {
  45         u8 buf[2] = { reg, val };
  46         struct i2c_msg msg = { .addr = priv->cfg->i2c_address,
  47                                .flags = 0, .buf = buf, .len = 2 };
  48
  49         if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
  50                 dev_warn(&priv->i2c->dev, "%s: i2c wr failed reg=%02x\n",
  51                                 KBUILD_MODNAME, reg);
  52                 return -EREMOTEIO;
  53         }
  54         return 0;
  55 }
  56
  57 static int qt1010_set_params(struct dvb_frontend *fe)
  58 {
  59         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  60         struct qt1010_priv *priv;
  61         int err;
  62         u32 freq, div, mod1, mod2;
  63         u8 i, tmpval, reg05;
  64         qt1010_i2c_oper_t rd[48] = {
  65                 { QT1010_WR, 0x01, 0x80 },
  66                 { QT1010_WR, 0x02, 0x3f },
  67                 { QT1010_WR, 0x05, 0xff }, /* 02 c write */
  68                 { QT1010_WR, 0x06, 0x44 },
  69                 { QT1010_WR, 0x07, 0xff }, /* 04 c write */
  70                 { QT1010_WR, 0x08, 0x08 },
  71                 { QT1010_WR, 0x09, 0xff }, /* 06 c write */
  72                 { QT1010_WR, 0x0a, 0xff }, /* 07 c write */
  73                 { QT1010_WR, 0x0b, 0xff }, /* 08 c write */
  74                 { QT1010_WR, 0x0c, 0xe1 },
  75                 { QT1010_WR, 0x1a, 0xff }, /* 10 c write */
  76                 { QT1010_WR, 0x1b, 0x00 },
  77                 { QT1010_WR, 0x1c, 0x89 },
  78                 { QT1010_WR, 0x11, 0xff }, /* 13 c write */
  79                 { QT1010_WR, 0x12, 0xff }, /* 14 c write */
  80                 { QT1010_WR, 0x22, 0xff }, /* 15 c write */
  81                 { QT1010_WR, 0x1e, 0x00 },
  82                 { QT1010_WR, 0x1e, 0xd0 },
  83                 { QT1010_RD, 0x22, 0xff }, /* 16 c read */
  84                 { QT1010_WR, 0x1e, 0x00 },
  85                 { QT1010_RD, 0x05, 0xff }, /* 20 c read */
  86                 { QT1010_RD, 0x22, 0xff }, /* 21 c read */
  87                 { QT1010_WR, 0x23, 0xd0 },
  88                 { QT1010_WR, 0x1e, 0x00 },
  89                 { QT1010_WR, 0x1e, 0xe0 },
  90                 { QT1010_RD, 0x23, 0xff }, /* 25 c read */
  91                 { QT1010_RD, 0x23, 0xff }, /* 26 c read */
  92                 { QT1010_WR, 0x1e, 0x00 },
  93                 { QT1010_WR, 0x24, 0xd0 },
  94                 { QT1010_WR, 0x1e, 0x00 },
  95                 { QT1010_WR, 0x1e, 0xf0 },
  96                 { QT1010_RD, 0x24, 0xff }, /* 31 c read */
  97                 { QT1010_WR, 0x1e, 0x00 },
  98                 { QT1010_WR, 0x14, 0x7f },
  99                 { QT1010_WR, 0x15, 0x7f },
 100                 { QT1010_WR, 0x05, 0xff }, /* 35 c write */
 101                 { QT1010_WR, 0x06, 0x00 },
 102                 { QT1010_WR, 0x15, 0x1f },
 103                 { QT1010_WR, 0x16, 0xff },
 104                 { QT1010_WR, 0x18, 0xff },
 105                 { QT1010_WR, 0x1f, 0xff }, /* 40 c write */
 106                 { QT1010_WR, 0x20, 0xff }, /* 41 c write */
 107                 { QT1010_WR, 0x21, 0x53 },
 108                 { QT1010_WR, 0x25, 0xff }, /* 43 c write */
 109                 { QT1010_WR, 0x26, 0x15 },
 110                 { QT1010_WR, 0x00, 0xff }, /* 45 c write */
 111                 { QT1010_WR, 0x02, 0x00 },
 112                 { QT1010_WR, 0x01, 0x00 }
 113         };
 114
 115 #define FREQ1 32000000 /* 32 MHz */
 116 #define FREQ2  4000000 /* 4 MHz Quartz oscillator in the stick? */
 117
 118         priv = fe->tuner_priv;
 119         freq = c->frequency;
 120         div = (freq + QT1010_OFFSET) / QT1010_STEP;
 121         freq = (div * QT1010_STEP) - QT1010_OFFSET;
 122         mod1 = (freq + QT1010_OFFSET) % FREQ1;
 123         mod2 = (freq + QT1010_OFFSET) % FREQ2;
 124         priv->frequency = freq;
 125
 126         if (fe->ops.i2c_gate_ctrl)
 127                 fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */
 128
 129         /* reg 05 base value */
 130         if      (freq < 290000000) reg05 = 0x14; /* 290 MHz */
 131         else if (freq < 610000000) reg05 = 0x34; /* 610 MHz */
 132         else if (freq < 802000000) reg05 = 0x54; /* 802 MHz */
 133         else                       reg05 = 0x74;
 134
 135         /* 0x5 */
 136         rd[2].val = reg05;
 137
 138         /* 07 - set frequency: 32 MHz scale */
 139         rd[4].val = (freq + QT1010_OFFSET) / FREQ1;
 140
 141         /* 09 - changes every 8/24 MHz */
 142         if (mod1 < 8000000) rd[6].val = 0x1d;
 143         else                rd[6].val = 0x1c;
 144
 145         /* 0a - set frequency: 4 MHz scale (max 28 MHz) */
 146         if      (mod1 < 1*FREQ2) rd[7].val = 0x09; /*  +0 MHz */
 147         else if (mod1 < 2*FREQ2) rd[7].val = 0x08; /*  +4 MHz */
 148         else if (mod1 < 3*FREQ2) rd[7].val = 0x0f; /*  +8 MHz */
 149         else if (mod1 < 4*FREQ2) rd[7].val = 0x0e; /* +12 MHz */
 150         else if (mod1 < 5*FREQ2) rd[7].val = 0x0d; /* +16 MHz */
 151         else if (mod1 < 6*FREQ2) rd[7].val = 0x0c; /* +20 MHz */
 152         else if (mod1 < 7*FREQ2) rd[7].val = 0x0b; /* +24 MHz */
 153         else                     rd[7].val = 0x0a; /* +28 MHz */
 154
 155         /* 0b - changes every 2/2 MHz */
 156         if (mod2 < 2000000) rd[8].val = 0x45;
 157         else                rd[8].val = 0x44;
 158
 159         /* 1a - set frequency: 125 kHz scale (max 3875 kHz)*/
 160         tmpval = 0x78; /* byte, overflows intentionally */
 161         rd[10].val = tmpval-((mod2/QT1010_STEP)*0x08);
 162
 163         /* 11 */
 164         rd[13].val = 0xfd; /* TODO: correct value calculation */
 165
 166         /* 12 */
 167         rd[14].val = 0x91; /* TODO: correct value calculation */
 168
 169         /* 22 */
 170         if      (freq < 450000000) rd[15].val = 0xd0; /* 450 MHz */
 171         else if (freq < 482000000) rd[15].val = 0xd1; /* 482 MHz */
 172         else if (freq < 514000000) rd[15].val = 0xd4; /* 514 MHz */
 173         else if (freq < 546000000) rd[15].val = 0xd7; /* 546 MHz */
 174         else if (freq < 610000000) rd[15].val = 0xda; /* 610 MHz */
 175         else                       rd[15].val = 0xd0;
 176
 177         /* 05 */
 178         rd[35].val = (reg05 & 0xf0);
 179
 180         /* 1f */
 181         if      (mod1 <  8000000) tmpval = 0x00;
 182         else if (mod1 < 12000000) tmpval = 0x01;
 183         else if (mod1 < 16000000) tmpval = 0x02;
 184         else if (mod1 < 24000000) tmpval = 0x03;
 185         else if (mod1 < 28000000) tmpval = 0x04;
 186         else                      tmpval = 0x05;
 187         rd[40].val = (priv->reg1f_init_val + 0x0e + tmpval);
 188
 189         /* 20 */
 190         if      (mod1 <  8000000) tmpval = 0x00;
 191         else if (mod1 < 12000000) tmpval = 0x01;
 192         else if (mod1 < 20000000) tmpval = 0x02;
 193         else if (mod1 < 24000000) tmpval = 0x03;
 194         else if (mod1 < 28000000) tmpval = 0x04;
 195         else                      tmpval = 0x05;
 196         rd[41].val = (priv->reg20_init_val + 0x0d + tmpval);
 197
 198         /* 25 */
 199         rd[43].val = priv->reg25_init_val;
 200
 201         /* 00 */
 202         rd[45].val = 0x92; /* TODO: correct value calculation */
 203
 204         dev_dbg(&priv->i2c->dev,
 205                         "%s: freq:%u 05:%02x 07:%02x 09:%02x 0a:%02x 0b:%02x " \
 206                         "1a:%02x 11:%02x 12:%02x 22:%02x 05:%02x 1f:%02x " \
 207                         "20:%02x 25:%02x 00:%02x\n", __func__, \
 208                         freq, rd[2].val, rd[4].val, rd[6].val, rd[7].val, \
 209                         rd[8].val, rd[10].val, rd[13].val, rd[14].val, \
 210                         rd[15].val, rd[35].val, rd[40].val, rd[41].val, \
 211                         rd[43].val, rd[45].val);
 212
 213         for (i = 0; i < ARRAY_SIZE(rd); i++) {
 214                 if (rd[i].oper == QT1010_WR) {
 215                         err = qt1010_writereg(priv, rd[i].reg, rd[i].val);
 216                 } else { /* read is required to proper locking */
 217                         err = qt1010_readreg(priv, rd[i].reg, &tmpval);
 218                 }
 219                 if (err) return err;
 220         }
 221
 222         if (fe->ops.i2c_gate_ctrl)
 223                 fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */
 224
 225         return 0;
 226 }
 227
 228 static int qt1010_init_meas1(struct qt1010_priv *priv,
 229                              u8 oper, u8 reg, u8 reg_init_val, u8 *retval)
 230 {
 231         u8 i, val1, val2;
 232         int err;
 233
 234         qt1010_i2c_oper_t i2c_data[] = {
 235                 { QT1010_WR, reg, reg_init_val },
 236                 { QT1010_WR, 0x1e, 0x00 },
 237                 { QT1010_WR, 0x1e, oper },
 238                 { QT1010_RD, reg, 0xff }
 239         };
 240
 241         for (i = 0; i < ARRAY_SIZE(i2c_data); i++) {
 242                 if (i2c_data[i].oper == QT1010_WR) {
 243                         err = qt1010_writereg(priv, i2c_data[i].reg,
 244                                               i2c_data[i].val);
 245                 } else {
 246                         err = qt1010_readreg(priv, i2c_data[i].reg, &val2);
 247                 }
 248                 if (err) return err;
 249         }
 250
 251         do {
 252                 val1 = val2;
 253                 err = qt1010_readreg(priv, reg, &val2);
 254                 if (err) return err;
 255                 dev_dbg(&priv->i2c->dev, "%s: compare reg:%02x %02x %02x\n",
 256                                 __func__, reg, val1, val2);
 257         } while (val1 != val2);
 258         *retval = val1;
 259
 260         return qt1010_writereg(priv, 0x1e, 0x00);
 261 }
 262
 263 static int qt1010_init_meas2(struct qt1010_priv *priv,
 264                             u8 reg_init_val, u8 *retval)
 265 {
 266         u8 i, val;
 267         int err;
 268         qt1010_i2c_oper_t i2c_data[] = {
 269                 { QT1010_WR, 0x07, reg_init_val },
 270                 { QT1010_WR, 0x22, 0xd0 },
 271                 { QT1010_WR, 0x1e, 0x00 },
 272                 { QT1010_WR, 0x1e, 0xd0 },
 273                 { QT1010_RD, 0x22, 0xff },
 274                 { QT1010_WR, 0x1e, 0x00 },
 275                 { QT1010_WR, 0x22, 0xff }
 276         };
 277         for (i = 0; i < ARRAY_SIZE(i2c_data); i++) {
 278                 if (i2c_data[i].oper == QT1010_WR) {
 279                         err = qt1010_writereg(priv, i2c_data[i].reg,
 280                                               i2c_data[i].val);
 281                 } else {
 282                         err = qt1010_readreg(priv, i2c_data[i].reg, &val);
 283                 }
 284                 if (err) return err;
 285         }
 286         *retval = val;
 287         return 0;
 288 }
 289
 290 static int qt1010_init(struct dvb_frontend *fe)
 291 {
 292         struct qt1010_priv *priv = fe->tuner_priv;
 293         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 294         int err = 0;
 295         u8 i, tmpval, *valptr = NULL;
 296
 297         static const qt1010_i2c_oper_t i2c_data[] = {
 298                 { QT1010_WR, 0x01, 0x80 },
 299                 { QT1010_WR, 0x0d, 0x84 },
 300                 { QT1010_WR, 0x0e, 0xb7 },
 301                 { QT1010_WR, 0x2a, 0x23 },
 302                 { QT1010_WR, 0x2c, 0xdc },
 303                 { QT1010_M1, 0x25, 0x40 }, /* get reg 25 init value */
 304                 { QT1010_M1, 0x81, 0xff }, /* get reg 25 init value */
 305                 { QT1010_WR, 0x2b, 0x70 },
 306                 { QT1010_WR, 0x2a, 0x23 },
 307                 { QT1010_M1, 0x26, 0x08 },
 308                 { QT1010_M1, 0x82, 0xff },
 309                 { QT1010_WR, 0x05, 0x14 },
 310                 { QT1010_WR, 0x06, 0x44 },
 311                 { QT1010_WR, 0x07, 0x28 },
 312                 { QT1010_WR, 0x08, 0x0b },
 313                 { QT1010_WR, 0x11, 0xfd },
 314                 { QT1010_M1, 0x22, 0x0d },
 315                 { QT1010_M1, 0xd0, 0xff },
 316                 { QT1010_WR, 0x06, 0x40 },
 317                 { QT1010_WR, 0x16, 0xf0 },
 318                 { QT1010_WR, 0x02, 0x38 },
 319                 { QT1010_WR, 0x03, 0x18 },
 320                 { QT1010_WR, 0x20, 0xe0 },
 321                 { QT1010_M1, 0x1f, 0x20 }, /* get reg 1f init value */
 322                 { QT1010_M1, 0x84, 0xff }, /* get reg 1f init value */
 323                 { QT1010_RD, 0x20, 0x20 }, /* get reg 20 init value */
 324                 { QT1010_WR, 0x03, 0x19 },
 325                 { QT1010_WR, 0x02, 0x3f },
 326                 { QT1010_WR, 0x21, 0x53 },
 327                 { QT1010_RD, 0x21, 0xff },
 328                 { QT1010_WR, 0x11, 0xfd },
 329                 { QT1010_WR, 0x05, 0x34 },
 330                 { QT1010_WR, 0x06, 0x44 },
 331                 { QT1010_WR, 0x08, 0x08 }
 332         };
 333
 334         if (fe->ops.i2c_gate_ctrl)
 335                 fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */
 336
 337         for (i = 0; i < ARRAY_SIZE(i2c_data); i++) {
 338                 switch (i2c_data[i].oper) {
 339                 case QT1010_WR:
 340                         err = qt1010_writereg(priv, i2c_data[i].reg,
 341                                               i2c_data[i].val);
 342                         break;
 343                 case QT1010_RD:
 344                         if (i2c_data[i].val == 0x20)
 345                                 valptr = &priv->reg20_init_val;
 346                         else
 347                                 valptr = &tmpval;
 348                         err = qt1010_readreg(priv, i2c_data[i].reg, valptr);
 349                         break;
 350                 case QT1010_M1:
 351                         if (i2c_data[i].val == 0x25)
 352                                 valptr = &priv->reg25_init_val;
 353                         else if (i2c_data[i].val == 0x1f)
 354                                 valptr = &priv->reg1f_init_val;
 355                         else
 356                                 valptr = &tmpval;
 357
 358                         BUG_ON(i >= ARRAY_SIZE(i2c_data) - 1);
 359
 360                         err = qt1010_init_meas1(priv, i2c_data[i+1].reg,
 361                                                 i2c_data[i].reg,
 362                                                 i2c_data[i].val, valptr);
 363                         i++;
 364                         break;
 365                 }
 366                 if (err)
 367                         return err;
 368         }
 369
 370         for (i = 0x31; i < 0x3a; i++) /* 0x31 - 0x39 */
 371                 if ((err = qt1010_init_meas2(priv, i, &tmpval)))
 372                         return err;
 373
 374         if (!c->frequency)
 375                 c->frequency = 545000000; /* Sigmatek DVB-110 545000000 */
 376                                       /* MSI Megasky 580 GL861 533000000 */
 377         return qt1010_set_params(fe);
 378 }
 379
 380 static int qt1010_release(struct dvb_frontend *fe)
 381 {
 382         kfree(fe->tuner_priv);
 383         fe->tuner_priv = NULL;
 384         return 0;
 385 }
 386
 387 static int qt1010_get_frequency(struct dvb_frontend *fe, u32 *frequency)
 388 {
 389         struct qt1010_priv *priv = fe->tuner_priv;
 390         *frequency = priv->frequency;
 391         return 0;
 392 }
 393
 394 static int qt1010_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
 395 {
 396         *frequency = 36125000;
 397         return 0;
 398 }
 399
 400 static const struct dvb_tuner_ops qt1010_tuner_ops = {
 401         .info = {
 402                 .name           = "Quantek QT1010",
 403                 .frequency_min  = QT1010_MIN_FREQ,
 404                 .frequency_max  = QT1010_MAX_FREQ,
 405                 .frequency_step = QT1010_STEP,
 406         },
 407
 408         .release       = qt1010_release,
 409         .init          = qt1010_init,
 410         /* TODO: implement sleep */
 411
 412         .set_params    = qt1010_set_params,
 413         .get_frequency = qt1010_get_frequency,
 414         .get_if_frequency = qt1010_get_if_frequency,
 415 };
 416
 417 struct dvb_frontend * qt1010_attach(struct dvb_frontend *fe,
 418                                     struct i2c_adapter *i2c,
 419                                     struct qt1010_config *cfg)
 420 {
 421         struct qt1010_priv *priv = NULL;
 422         u8 id;
 423
 424         priv = kzalloc(sizeof(struct qt1010_priv), GFP_KERNEL);
 425         if (priv == NULL)
 426                 return NULL;
 427
 428         priv->cfg = cfg;
 429         priv->i2c = i2c;
 430
 431         if (fe->ops.i2c_gate_ctrl)
 432                 fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */
 433
 434
 435         /* Try to detect tuner chip. Probably this is not correct register. */
 436         if (qt1010_readreg(priv, 0x29, &id) != 0 || (id != 0x39)) {
 437                 kfree(priv);
 438                 return NULL;
 439         }
 440
 441         if (fe->ops.i2c_gate_ctrl)
 442                 fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */
 443
 444         dev_info(&priv->i2c->dev,
 445                         "%s: Quantek QT1010 successfully identified\n",
 446                         KBUILD_MODNAME);
 447
 448         memcpy(&fe->ops.tuner_ops, &qt1010_tuner_ops,
 449                sizeof(struct dvb_tuner_ops));
 450
 451         fe->tuner_priv = priv;
 452         return fe;
 453 }
 454 EXPORT_SYMBOL(qt1010_attach);
 455
 456 MODULE_DESCRIPTION("Quantek QT1010 silicon tuner driver");
 457 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 458 MODULE_AUTHOR("Aapo Tahkola <aet@rasterburn.org>");
 459 MODULE_VERSION("0.1");
 460 MODULE_LICENSE("GPL");