drivers/media/tuners/qt1010.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *  Driver for Quantek QT1010 silicon tuner
   4  *
   5  *  Copyright (C) 2006 Antti Palosaari <crope@iki.fi>
   6  *                     Aapo Tahkola <aet@rasterburn.org>
   7  */
   8 #include "qt1010.h"
   9 #include "qt1010_priv.h"
  10
  11 /* read single register */
  12 static int qt1010_readreg(struct qt1010_priv *priv, u8 reg, u8 *val)
  13 {
  14         struct i2c_msg msg[2] = {
  15                 { .addr = priv->cfg->i2c_address,
  16                   .flags = 0, .buf = &reg, .len = 1 },
  17                 { .addr = priv->cfg->i2c_address,
  18                   .flags = I2C_M_RD, .buf = val, .len = 1 },
  19         };
  20
  21         if (i2c_transfer(priv->i2c, msg, 2) != 2) {
  22                 dev_warn(&priv->i2c->dev, "%s: i2c rd failed reg=%02x\n",
  23                                 KBUILD_MODNAME, reg);
  24                 return -EREMOTEIO;
  25         }
  26         return 0;
  27 }
  28
  29 /* write single register */
  30 static int qt1010_writereg(struct qt1010_priv *priv, u8 reg, u8 val)
  31 {
  32         u8 buf[2] = { reg, val };
  33         struct i2c_msg msg = { .addr = priv->cfg->i2c_address,
  34                                .flags = 0, .buf = buf, .len = 2 };
  35
  36         if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
  37                 dev_warn(&priv->i2c->dev, "%s: i2c wr failed reg=%02x\n",
  38                                 KBUILD_MODNAME, reg);
  39                 return -EREMOTEIO;
  40         }
  41         return 0;
  42 }
  43
  44 static int qt1010_set_params(struct dvb_frontend *fe)
  45 {
  46         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
  47         struct qt1010_priv *priv;
  48         int err;
  49         u32 freq, div, mod1, mod2;
  50         u8 i, tmpval, reg05;
  51         qt1010_i2c_oper_t rd[48] = {
  52                 { QT1010_WR, 0x01, 0x80 },
  53                 { QT1010_WR, 0x02, 0x3f },
  54                 { QT1010_WR, 0x05, 0xff }, /* 02 c write */
  55                 { QT1010_WR, 0x06, 0x44 },
  56                 { QT1010_WR, 0x07, 0xff }, /* 04 c write */
  57                 { QT1010_WR, 0x08, 0x08 },
  58                 { QT1010_WR, 0x09, 0xff }, /* 06 c write */
  59                 { QT1010_WR, 0x0a, 0xff }, /* 07 c write */
  60                 { QT1010_WR, 0x0b, 0xff }, /* 08 c write */
  61                 { QT1010_WR, 0x0c, 0xe1 },
  62                 { QT1010_WR, 0x1a, 0xff }, /* 10 c write */
  63                 { QT1010_WR, 0x1b, 0x00 },
  64                 { QT1010_WR, 0x1c, 0x89 },
  65                 { QT1010_WR, 0x11, 0xff }, /* 13 c write */
  66                 { QT1010_WR, 0x12, 0xff }, /* 14 c write */
  67                 { QT1010_WR, 0x22, 0xff }, /* 15 c write */
  68                 { QT1010_WR, 0x1e, 0x00 },
  69                 { QT1010_WR, 0x1e, 0xd0 },
  70                 { QT1010_RD, 0x22, 0xff }, /* 16 c read */
  71                 { QT1010_WR, 0x1e, 0x00 },
  72                 { QT1010_RD, 0x05, 0xff }, /* 20 c read */
  73                 { QT1010_RD, 0x22, 0xff }, /* 21 c read */
  74                 { QT1010_WR, 0x23, 0xd0 },
  75                 { QT1010_WR, 0x1e, 0x00 },
  76                 { QT1010_WR, 0x1e, 0xe0 },
  77                 { QT1010_RD, 0x23, 0xff }, /* 25 c read */
  78                 { QT1010_RD, 0x23, 0xff }, /* 26 c read */
  79                 { QT1010_WR, 0x1e, 0x00 },
  80                 { QT1010_WR, 0x24, 0xd0 },
  81                 { QT1010_WR, 0x1e, 0x00 },
  82                 { QT1010_WR, 0x1e, 0xf0 },
  83                 { QT1010_RD, 0x24, 0xff }, /* 31 c read */
  84                 { QT1010_WR, 0x1e, 0x00 },
  85                 { QT1010_WR, 0x14, 0x7f },
  86                 { QT1010_WR, 0x15, 0x7f },
  87                 { QT1010_WR, 0x05, 0xff }, /* 35 c write */
  88                 { QT1010_WR, 0x06, 0x00 },
  89                 { QT1010_WR, 0x15, 0x1f },
  90                 { QT1010_WR, 0x16, 0xff },
  91                 { QT1010_WR, 0x18, 0xff },
  92                 { QT1010_WR, 0x1f, 0xff }, /* 40 c write */
  93                 { QT1010_WR, 0x20, 0xff }, /* 41 c write */
  94                 { QT1010_WR, 0x21, 0x53 },
  95                 { QT1010_WR, 0x25, 0xff }, /* 43 c write */
  96                 { QT1010_WR, 0x26, 0x15 },
  97                 { QT1010_WR, 0x00, 0xff }, /* 45 c write */
  98                 { QT1010_WR, 0x02, 0x00 },
  99                 { QT1010_WR, 0x01, 0x00 }
 100         };
 101
 102 #define FREQ1 32000000 /* 32 MHz */
 103 #define FREQ2  4000000 /* 4 MHz Quartz oscillator in the stick? */
 104
 105         priv = fe->tuner_priv;
 106         freq = c->frequency;
 107         div = (freq + QT1010_OFFSET) / QT1010_STEP;
 108         freq = (div * QT1010_STEP) - QT1010_OFFSET;
 109         mod1 = (freq + QT1010_OFFSET) % FREQ1;
 110         mod2 = (freq + QT1010_OFFSET) % FREQ2;
 111         priv->frequency = freq;
 112
 113         if (fe->ops.i2c_gate_ctrl)
 114                 fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */
 115
 116         /* reg 05 base value */
 117         if      (freq < 290000000) reg05 = 0x14; /* 290 MHz */
 118         else if (freq < 610000000) reg05 = 0x34; /* 610 MHz */
 119         else if (freq < 802000000) reg05 = 0x54; /* 802 MHz */
 120         else                       reg05 = 0x74;
 121
 122         /* 0x5 */
 123         rd[2].val = reg05;
 124
 125         /* 07 - set frequency: 32 MHz scale */
 126         rd[4].val = (freq + QT1010_OFFSET) / FREQ1;
 127
 128         /* 09 - changes every 8/24 MHz */
 129         if (mod1 < 8000000) rd[6].val = 0x1d;
 130         else                rd[6].val = 0x1c;
 131
 132         /* 0a - set frequency: 4 MHz scale (max 28 MHz) */
 133         if      (mod1 < 1*FREQ2) rd[7].val = 0x09; /*  +0 MHz */
 134         else if (mod1 < 2*FREQ2) rd[7].val = 0x08; /*  +4 MHz */
 135         else if (mod1 < 3*FREQ2) rd[7].val = 0x0f; /*  +8 MHz */
 136         else if (mod1 < 4*FREQ2) rd[7].val = 0x0e; /* +12 MHz */
 137         else if (mod1 < 5*FREQ2) rd[7].val = 0x0d; /* +16 MHz */
 138         else if (mod1 < 6*FREQ2) rd[7].val = 0x0c; /* +20 MHz */
 139         else if (mod1 < 7*FREQ2) rd[7].val = 0x0b; /* +24 MHz */
 140         else                     rd[7].val = 0x0a; /* +28 MHz */
 141
 142         /* 0b - changes every 2/2 MHz */
 143         if (mod2 < 2000000) rd[8].val = 0x45;
 144         else                rd[8].val = 0x44;
 145
 146         /* 1a - set frequency: 125 kHz scale (max 3875 kHz)*/
 147         tmpval = 0x78; /* byte, overflows intentionally */
 148         rd[10].val = tmpval-((mod2/QT1010_STEP)*0x08);
 149
 150         /* 11 */
 151         rd[13].val = 0xfd; /* TODO: correct value calculation */
 152
 153         /* 12 */
 154         rd[14].val = 0x91; /* TODO: correct value calculation */
 155
 156         /* 22 */
 157         if      (freq < 450000000) rd[15].val = 0xd0; /* 450 MHz */
 158         else if (freq < 482000000) rd[15].val = 0xd1; /* 482 MHz */
 159         else if (freq < 514000000) rd[15].val = 0xd4; /* 514 MHz */
 160         else if (freq < 546000000) rd[15].val = 0xd7; /* 546 MHz */
 161         else if (freq < 610000000) rd[15].val = 0xda; /* 610 MHz */
 162         else                       rd[15].val = 0xd0;
 163
 164         /* 05 */
 165         rd[35].val = (reg05 & 0xf0);
 166
 167         /* 1f */
 168         if      (mod1 <  8000000) tmpval = 0x00;
 169         else if (mod1 < 12000000) tmpval = 0x01;
 170         else if (mod1 < 16000000) tmpval = 0x02;
 171         else if (mod1 < 24000000) tmpval = 0x03;
 172         else if (mod1 < 28000000) tmpval = 0x04;
 173         else                      tmpval = 0x05;
 174         rd[40].val = (priv->reg1f_init_val + 0x0e + tmpval);
 175
 176         /* 20 */
 177         if      (mod1 <  8000000) tmpval = 0x00;
 178         else if (mod1 < 12000000) tmpval = 0x01;
 179         else if (mod1 < 20000000) tmpval = 0x02;
 180         else if (mod1 < 24000000) tmpval = 0x03;
 181         else if (mod1 < 28000000) tmpval = 0x04;
 182         else                      tmpval = 0x05;
 183         rd[41].val = (priv->reg20_init_val + 0x0d + tmpval);
 184
 185         /* 25 */
 186         rd[43].val = priv->reg25_init_val;
 187
 188         /* 00 */
 189         rd[45].val = 0x92; /* TODO: correct value calculation */
 190
 191         dev_dbg(&priv->i2c->dev,
 192                         "%s: freq:%u 05:%02x 07:%02x 09:%02x 0a:%02x 0b:%02x " \
 193                         "1a:%02x 11:%02x 12:%02x 22:%02x 05:%02x 1f:%02x " \
 194                         "20:%02x 25:%02x 00:%02x\n", __func__, \
 195                         freq, rd[2].val, rd[4].val, rd[6].val, rd[7].val, \
 196                         rd[8].val, rd[10].val, rd[13].val, rd[14].val, \
 197                         rd[15].val, rd[35].val, rd[40].val, rd[41].val, \
 198                         rd[43].val, rd[45].val);
 199
 200         for (i = 0; i < ARRAY_SIZE(rd); i++) {
 201                 if (rd[i].oper == QT1010_WR) {
 202                         err = qt1010_writereg(priv, rd[i].reg, rd[i].val);
 203                 } else { /* read is required to proper locking */
 204                         err = qt1010_readreg(priv, rd[i].reg, &tmpval);
 205                 }
 206                 if (err) return err;
 207         }
 208
 209         if (fe->ops.i2c_gate_ctrl)
 210                 fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */
 211
 212         return 0;
 213 }
 214
 215 static int qt1010_init_meas1(struct qt1010_priv *priv,
 216                              u8 oper, u8 reg, u8 reg_init_val, u8 *retval)
 217 {
 218         u8 i, val1, uninitialized_var(val2);
 219         int err;
 220
 221         qt1010_i2c_oper_t i2c_data[] = {
 222                 { QT1010_WR, reg, reg_init_val },
 223                 { QT1010_WR, 0x1e, 0x00 },
 224                 { QT1010_WR, 0x1e, oper },
 225                 { QT1010_RD, reg, 0xff }
 226         };
 227
 228         for (i = 0; i < ARRAY_SIZE(i2c_data); i++) {
 229                 if (i2c_data[i].oper == QT1010_WR) {
 230                         err = qt1010_writereg(priv, i2c_data[i].reg,
 231                                               i2c_data[i].val);
 232                 } else {
 233                         err = qt1010_readreg(priv, i2c_data[i].reg, &val2);
 234                 }
 235                 if (err) return err;
 236         }
 237
 238         do {
 239                 val1 = val2;
 240                 err = qt1010_readreg(priv, reg, &val2);
 241                 if (err) return err;
 242                 dev_dbg(&priv->i2c->dev, "%s: compare reg:%02x %02x %02x\n",
 243                                 __func__, reg, val1, val2);
 244         } while (val1 != val2);
 245         *retval = val1;
 246
 247         return qt1010_writereg(priv, 0x1e, 0x00);
 248 }
 249
 250 static int qt1010_init_meas2(struct qt1010_priv *priv,
 251                             u8 reg_init_val, u8 *retval)
 252 {
 253         u8 i, uninitialized_var(val);
 254         int err;
 255         qt1010_i2c_oper_t i2c_data[] = {
 256                 { QT1010_WR, 0x07, reg_init_val },
 257                 { QT1010_WR, 0x22, 0xd0 },
 258                 { QT1010_WR, 0x1e, 0x00 },
 259                 { QT1010_WR, 0x1e, 0xd0 },
 260                 { QT1010_RD, 0x22, 0xff },
 261                 { QT1010_WR, 0x1e, 0x00 },
 262                 { QT1010_WR, 0x22, 0xff }
 263         };
 264         for (i = 0; i < ARRAY_SIZE(i2c_data); i++) {
 265                 if (i2c_data[i].oper == QT1010_WR) {
 266                         err = qt1010_writereg(priv, i2c_data[i].reg,
 267                                               i2c_data[i].val);
 268                 } else {
 269                         err = qt1010_readreg(priv, i2c_data[i].reg, &val);
 270                 }
 271                 if (err) return err;
 272         }
 273         *retval = val;
 274         return 0;
 275 }
 276
 277 static int qt1010_init(struct dvb_frontend *fe)
 278 {
 279         struct qt1010_priv *priv = fe->tuner_priv;
 280         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 281         int err = 0;
 282         u8 i, tmpval, *valptr = NULL;
 283
 284         static const qt1010_i2c_oper_t i2c_data[] = {
 285                 { QT1010_WR, 0x01, 0x80 },
 286                 { QT1010_WR, 0x0d, 0x84 },
 287                 { QT1010_WR, 0x0e, 0xb7 },
 288                 { QT1010_WR, 0x2a, 0x23 },
 289                 { QT1010_WR, 0x2c, 0xdc },
 290                 { QT1010_M1, 0x25, 0x40 }, /* get reg 25 init value */
 291                 { QT1010_M1, 0x81, 0xff }, /* get reg 25 init value */
 292                 { QT1010_WR, 0x2b, 0x70 },
 293                 { QT1010_WR, 0x2a, 0x23 },
 294                 { QT1010_M1, 0x26, 0x08 },
 295                 { QT1010_M1, 0x82, 0xff },
 296                 { QT1010_WR, 0x05, 0x14 },
 297                 { QT1010_WR, 0x06, 0x44 },
 298                 { QT1010_WR, 0x07, 0x28 },
 299                 { QT1010_WR, 0x08, 0x0b },
 300                 { QT1010_WR, 0x11, 0xfd },
 301                 { QT1010_M1, 0x22, 0x0d },
 302                 { QT1010_M1, 0xd0, 0xff },
 303                 { QT1010_WR, 0x06, 0x40 },
 304                 { QT1010_WR, 0x16, 0xf0 },
 305                 { QT1010_WR, 0x02, 0x38 },
 306                 { QT1010_WR, 0x03, 0x18 },
 307                 { QT1010_WR, 0x20, 0xe0 },
 308                 { QT1010_M1, 0x1f, 0x20 }, /* get reg 1f init value */
 309                 { QT1010_M1, 0x84, 0xff }, /* get reg 1f init value */
 310                 { QT1010_RD, 0x20, 0x20 }, /* get reg 20 init value */
 311                 { QT1010_WR, 0x03, 0x19 },
 312                 { QT1010_WR, 0x02, 0x3f },
 313                 { QT1010_WR, 0x21, 0x53 },
 314                 { QT1010_RD, 0x21, 0xff },
 315                 { QT1010_WR, 0x11, 0xfd },
 316                 { QT1010_WR, 0x05, 0x34 },
 317                 { QT1010_WR, 0x06, 0x44 },
 318                 { QT1010_WR, 0x08, 0x08 }
 319         };
 320
 321         if (fe->ops.i2c_gate_ctrl)
 322                 fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */
 323
 324         for (i = 0; i < ARRAY_SIZE(i2c_data); i++) {
 325                 switch (i2c_data[i].oper) {
 326                 case QT1010_WR:
 327                         err = qt1010_writereg(priv, i2c_data[i].reg,
 328                                               i2c_data[i].val);
 329                         break;
 330                 case QT1010_RD:
 331                         if (i2c_data[i].val == 0x20)
 332                                 valptr = &priv->reg20_init_val;
 333                         else
 334                                 valptr = &tmpval;
 335                         err = qt1010_readreg(priv, i2c_data[i].reg, valptr);
 336                         break;
 337                 case QT1010_M1:
 338                         if (i2c_data[i].val == 0x25)
 339                                 valptr = &priv->reg25_init_val;
 340                         else if (i2c_data[i].val == 0x1f)
 341                                 valptr = &priv->reg1f_init_val;
 342                         else
 343                                 valptr = &tmpval;
 344
 345                         BUG_ON(i >= ARRAY_SIZE(i2c_data) - 1);
 346
 347                         err = qt1010_init_meas1(priv, i2c_data[i+1].reg,
 348                                                 i2c_data[i].reg,
 349                                                 i2c_data[i].val, valptr);
 350                         i++;
 351                         break;
 352                 }
 353                 if (err)
 354                         return err;
 355         }
 356
 357         for (i = 0x31; i < 0x3a; i++) /* 0x31 - 0x39 */
 358                 if ((err = qt1010_init_meas2(priv, i, &tmpval)))
 359                         return err;
 360
 361         if (!c->frequency)
 362                 c->frequency = 545000000; /* Sigmatek DVB-110 545000000 */
 363                                       /* MSI Megasky 580 GL861 533000000 */
 364         return qt1010_set_params(fe);
 365 }
 366
 367 static void qt1010_release(struct dvb_frontend *fe)
 368 {
 369         kfree(fe->tuner_priv);
 370         fe->tuner_priv = NULL;
 371 }
 372
 373 static int qt1010_get_frequency(struct dvb_frontend *fe, u32 *frequency)
 374 {
 375         struct qt1010_priv *priv = fe->tuner_priv;
 376         *frequency = priv->frequency;
 377         return 0;
 378 }
 379
 380 static int qt1010_get_if_frequency(struct dvb_frontend *fe, u32 *frequency)
 381 {
 382         *frequency = 36125000;
 383         return 0;
 384 }
 385
 386 static const struct dvb_tuner_ops qt1010_tuner_ops = {
 387         .info = {
 388                 .name              = "Quantek QT1010",
 389                 .frequency_min_hz  = QT1010_MIN_FREQ,
 390                 .frequency_max_hz  = QT1010_MAX_FREQ,
 391                 .frequency_step_hz = QT1010_STEP,
 392         },
 393
 394         .release       = qt1010_release,
 395         .init          = qt1010_init,
 396         /* TODO: implement sleep */
 397
 398         .set_params    = qt1010_set_params,
 399         .get_frequency = qt1010_get_frequency,
 400         .get_if_frequency = qt1010_get_if_frequency,
 401 };
 402
 403 struct dvb_frontend * qt1010_attach(struct dvb_frontend *fe,
 404                                     struct i2c_adapter *i2c,
 405                                     struct qt1010_config *cfg)
 406 {
 407         struct qt1010_priv *priv = NULL;
 408         u8 id;
 409
 410         priv = kzalloc(sizeof(struct qt1010_priv), GFP_KERNEL);
 411         if (priv == NULL)
 412                 return NULL;
 413
 414         priv->cfg = cfg;
 415         priv->i2c = i2c;
 416
 417         if (fe->ops.i2c_gate_ctrl)
 418                 fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */
 419
 420
 421         /* Try to detect tuner chip. Probably this is not correct register. */
 422         if (qt1010_readreg(priv, 0x29, &id) != 0 || (id != 0x39)) {
 423                 kfree(priv);
 424                 return NULL;
 425         }
 426
 427         if (fe->ops.i2c_gate_ctrl)
 428                 fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */
 429
 430         dev_info(&priv->i2c->dev,
 431                         "%s: Quantek QT1010 successfully identified\n",
 432                         KBUILD_MODNAME);
 433
 434         memcpy(&fe->ops.tuner_ops, &qt1010_tuner_ops,
 435                sizeof(struct dvb_tuner_ops));
 436
 437         fe->tuner_priv = priv;
 438         return fe;
 439 }
 440 EXPORT_SYMBOL(qt1010_attach);
 441
 442 MODULE_DESCRIPTION("Quantek QT1010 silicon tuner driver");
 443 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 444 MODULE_AUTHOR("Aapo Tahkola <aet@rasterburn.org>");
 445 MODULE_VERSION("0.1");
 446 MODULE_LICENSE("GPL");