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   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 static int debug;
  25 module_param(debug, int, 0644);
  26 MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
  27
  28 #define dprintk(args...) do { if (debug) {printk(KERN_DEBUG "QT1010: " args); printk("\n"); }} while (0)
  29
  30 /* read single register */
  31 static int qt1010_readreg(struct qt1010_priv *priv, u8 reg, u8 *val)
  32 {
  33         struct i2c_msg msg[2] = {
  34                 { .addr = priv->cfg->i2c_address, .flags = 0,        .buf = &reg, .len = 1 },
  35                 { .addr = priv->cfg->i2c_address, .flags = I2C_M_RD, .buf = val,  .len = 1 },
  36         };
  37
  38         if (i2c_transfer(priv->i2c, msg, 2) != 2) {
  39                 printk(KERN_WARNING "qt1010 I2C read failed\n");
  40                 return -EREMOTEIO;
  41         }
  42         return 0;
  43 }
  44
  45 /* write single register */
  46 static int qt1010_writereg(struct qt1010_priv *priv, u8 reg, u8 val)
  47 {
  48         u8 buf[2] = { reg, val };
  49         struct i2c_msg msg = {
  50                 .addr = priv->cfg->i2c_address, .flags = 0, .buf = buf, .len = 2
  51         };
  52
  53         if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
  54                 printk(KERN_WARNING "qt1010 I2C write failed\n");
  55                 return -EREMOTEIO;
  56         }
  57         return 0;
  58 }
  59
  60 /* dump all registers */
  61 static void qt1010_dump_regs(struct qt1010_priv *priv)
  62 {
  63         char buf[52], buf2[4];
  64         u8 reg, val;
  65
  66         for (reg = 0; ; reg++) {
  67                 if (reg % 16 == 0) {
  68                         if (reg)
  69                                 printk("%s\n", buf);
  70                         sprintf(buf, "%02x: ", reg);
  71                 }
  72                 if (qt1010_readreg(priv, reg, &val) == 0)
  73                         sprintf(buf2, "%02x ", val);
  74                 else
  75                         strcpy(buf2, "-- ");
  76                 strcat(buf, buf2);
  77                 if (reg == 0x2f)
  78                         break;
  79         }
  80         printk("%s\n", buf);
  81 }
  82
  83 static int qt1010_set_params(struct dvb_frontend *fe, struct dvb_frontend_parameters *params)
  84 {
  85         struct qt1010_priv *priv;
  86         int err;
  87         u32 freq, div, mod1, mod2;
  88         u8 i, tmpval, reg05;
  89         qt1010_i2c_oper_t rd[48] = {
  90                 { QT1010_WR, 0x01, 0x80 },
  91                 { QT1010_WR, 0x02, 0x3f },
  92                 { QT1010_WR, 0x05, 0xff }, /* 02 c write */
  93                 { QT1010_WR, 0x06, 0x44 },
  94                 { QT1010_WR, 0x07, 0xff }, /* 04 c write */
  95                 { QT1010_WR, 0x08, 0x08 },
  96                 { QT1010_WR, 0x09, 0xff }, /* 06 c write */
  97                 { QT1010_WR, 0x0a, 0xff }, /* 07 c write */
  98                 { QT1010_WR, 0x0b, 0xff }, /* 08 c write */
  99                 { QT1010_WR, 0x0c, 0xe1 },
 100                 { QT1010_WR, 0x1a, 0xff }, /* 10 c write */
 101                 { QT1010_WR, 0x1b, 0x00 },
 102                 { QT1010_WR, 0x1c, 0x89 },
 103                 { QT1010_WR, 0x11, 0xff }, /* 13 c write */
 104                 { QT1010_WR, 0x12, 0xff }, /* 14 c write */
 105                 { QT1010_WR, 0x22, 0xff }, /* 15 c write */
 106                 { QT1010_WR, 0x1e, 0x00 },
 107                 { QT1010_WR, 0x1e, 0xd0 },
 108                 { QT1010_RD, 0x22, 0xff }, /* 16 c read */
 109                 { QT1010_WR, 0x1e, 0x00 },
 110                 { QT1010_RD, 0x05, 0xff }, /* 20 c read */
 111                 { QT1010_RD, 0x22, 0xff }, /* 21 c read */
 112                 { QT1010_WR, 0x23, 0xd0 },
 113                 { QT1010_WR, 0x1e, 0x00 },
 114                 { QT1010_WR, 0x1e, 0xe0 },
 115                 { QT1010_RD, 0x23, 0xff }, /* 25 c read */
 116                 { QT1010_RD, 0x23, 0xff }, /* 26 c read */
 117                 { QT1010_WR, 0x1e, 0x00 },
 118                 { QT1010_WR, 0x24, 0xd0 },
 119                 { QT1010_WR, 0x1e, 0x00 },
 120                 { QT1010_WR, 0x1e, 0xf0 },
 121                 { QT1010_RD, 0x24, 0xff }, /* 31 c read */
 122                 { QT1010_WR, 0x1e, 0x00 },
 123                 { QT1010_WR, 0x14, 0x7f },
 124                 { QT1010_WR, 0x15, 0x7f },
 125                 { QT1010_WR, 0x05, 0xff }, /* 35 c write */
 126                 { QT1010_WR, 0x06, 0x00 },
 127                 { QT1010_WR, 0x15, 0x1f },
 128                 { QT1010_WR, 0x16, 0xff },
 129                 { QT1010_WR, 0x18, 0xff },
 130                 { QT1010_WR, 0x1f, 0xff }, /* 40 c write */
 131                 { QT1010_WR, 0x20, 0xff }, /* 41 c write */
 132                 { QT1010_WR, 0x21, 0x53 },
 133                 { QT1010_WR, 0x25, 0xff }, /* 43 c write */
 134                 { QT1010_WR, 0x26, 0x15 },
 135                 { QT1010_WR, 0x00, 0xff }, /* 45 c write */
 136                 { QT1010_WR, 0x02, 0x00 },
 137                 { QT1010_WR, 0x01, 0x00 }
 138         };
 139
 140 #define FREQ1 32000000 /* 32 MHz */
 141 #define FREQ2  4000000 /* 4 MHz Quartz oscillator in the stick? */
 142
 143         priv = fe->tuner_priv;
 144         freq = params->frequency;
 145         div = (freq + QT1010_OFFSET) / QT1010_STEP;
 146         freq = (div * QT1010_STEP) - QT1010_OFFSET;
 147         mod1 = (freq + QT1010_OFFSET) % FREQ1;
 148         mod2 = (freq + QT1010_OFFSET) % FREQ2;
 149         priv->bandwidth = (fe->ops.info.type == FE_OFDM) ? params->u.ofdm.bandwidth : 0;
 150         priv->frequency = freq;
 151
 152         /* reg 05 base value */
 153         if      (freq < 290000000) reg05 = 0x14; /* 290 MHz */
 154         else if (freq < 610000000) reg05 = 0x34; /* 610 MHz */
 155         else if (freq < 802000000) reg05 = 0x54; /* 802 MHz */
 156         else                       reg05 = 0x74;
 157
 158         /* 0x5 */
 159         rd[2].val = reg05;
 160
 161         /* 07 - set frequency: 32 MHz scale */
 162         rd[4].val = (freq + QT1010_OFFSET) / FREQ1;
 163
 164         /* 09 - changes every 8/24 MHz */
 165         if (mod1 < 8000000) rd[6].val = 0x1d;
 166         else                rd[6].val = 0x1c;
 167
 168         /* 0a - set frequency: 4 MHz scale (max 28 MHz) */
 169         if      (mod1 < 1*FREQ2) rd[7].val = 0x09; /*  +0 MHz */
 170         else if (mod1 < 2*FREQ2) rd[7].val = 0x08; /*  +4 MHz */
 171         else if (mod1 < 3*FREQ2) rd[7].val = 0x0f; /*  +8 MHz */
 172         else if (mod1 < 4*FREQ2) rd[7].val = 0x0e; /* +12 MHz */
 173         else if (mod1 < 5*FREQ2) rd[7].val = 0x0d; /* +16 MHz */
 174         else if (mod1 < 6*FREQ2) rd[7].val = 0x0c; /* +20 MHz */
 175         else if (mod1 < 7*FREQ2) rd[7].val = 0x0b; /* +24 MHz */
 176         else                     rd[7].val = 0x0a; /* +28 MHz */
 177
 178         /* 0b - changes every 2/2 MHz */
 179         if (mod2 < 2000000) rd[8].val = 0x45;
 180         else                rd[8].val = 0x44;
 181
 182         /* 1a - set frequency: 125 kHz scale (max 3875 kHz)*/
 183         tmpval = 0x78; /* byte, overflows intentionally */
 184         rd[10].val = tmpval-((mod2/QT1010_STEP)*0x08);
 185
 186         /* 11 */
 187         rd[13].val = 0xfd; /* TODO: correct value calculation */
 188
 189         /* 12 */
 190         rd[14].val = 0x91; /* TODO: correct value calculation */
 191
 192         /* 22 */
 193         if      (freq < 450000000) rd[15].val = 0xd0; /* 450 MHz */
 194         else if (freq < 482000000) rd[15].val = 0xd1; /* 482 MHz */
 195         else if (freq < 514000000) rd[15].val = 0xd4; /* 514 MHz */
 196         else if (freq < 546000000) rd[15].val = 0xd7; /* 546 MHz */
 197         else if (freq < 610000000) rd[15].val = 0xda; /* 610 MHz */
 198         else                       rd[15].val = 0xd0;
 199
 200         /* 05 */
 201         rd[35].val = (reg05 & 0xf0);
 202
 203         /* 1f */
 204         if      (mod1 <  8000000) tmpval = 0x00;
 205         else if (mod1 < 12000000) tmpval = 0x01;
 206         else if (mod1 < 16000000) tmpval = 0x02;
 207         else if (mod1 < 24000000) tmpval = 0x03;
 208         else if (mod1 < 28000000) tmpval = 0x04;
 209         else                      tmpval = 0x05;
 210         rd[40].val = (priv->reg1f_init_val + 0x0e + tmpval);
 211
 212         /* 20 */
 213         if      (mod1 <  8000000) tmpval = 0x00;
 214         else if (mod1 < 12000000) tmpval = 0x01;
 215         else if (mod1 < 20000000) tmpval = 0x02;
 216         else if (mod1 < 24000000) tmpval = 0x03;
 217         else if (mod1 < 28000000) tmpval = 0x04;
 218         else                      tmpval = 0x05;
 219         rd[41].val = (priv->reg20_init_val + 0x0d + tmpval);
 220
 221         /* 25 */
 222         rd[43].val = priv->reg25_init_val;
 223
 224         /* 00 */
 225         rd[45].val = 0x92; /* TODO: correct value calculation */
 226
 227         dprintk("freq:%u 05:%02x 07:%02x 09:%02x 0a:%02x 0b:%02x 1a:%02x 11:%02x " \
 228                 "12:%02x 22:%02x 05:%02x 1f:%02x 20:%02x 25:%02x 00:%02x", \
 229                 freq, rd[2].val, rd[4].val, rd[6].val, rd[7].val, rd[8].val, \
 230                 rd[10].val, rd[13].val, rd[14].val, rd[15].val, rd[35].val, \
 231                 rd[40].val, rd[41].val, rd[43].val, rd[45].val);
 232
 233         for (i = 0; i < sizeof(rd) / sizeof(*rd); i++) {
 234                 if (rd[i].oper == QT1010_WR) {
 235                         err = qt1010_writereg(priv, rd[i].reg, rd[i].val);
 236                 } else { /* read is required to proper locking */
 237                         err = qt1010_readreg(priv, rd[i].reg, &tmpval);
 238                 }
 239                 if (err) return err;
 240         }
 241
 242         if (debug)
 243                 qt1010_dump_regs(priv);
 244
 245         return 0;
 246 }
 247
 248 static int qt1010_init_meas1(struct qt1010_priv *priv, u8 oper, u8 reg, u8 reg_init_val, u8 *retval)
 249 {
 250         u8 i, val1, val2;
 251         int err;
 252
 253         qt1010_i2c_oper_t i2c_data[] = {
 254                 { QT1010_WR, reg, reg_init_val },
 255                 { QT1010_WR, 0x1e, 0x00 },
 256                 { QT1010_WR, 0x1e, oper },
 257                 { QT1010_RD, reg, 0xff }
 258         };
 259
 260         for (i = 0; i < sizeof(i2c_data) / sizeof(*i2c_data); i++) {
 261                 if (i2c_data[i].oper == QT1010_WR) {
 262                         err = qt1010_writereg(priv, i2c_data[i].reg, i2c_data[i].val);
 263                 } else {
 264                         err = qt1010_readreg(priv, i2c_data[i].reg, &val2);
 265                 }
 266                 if (err) return err;
 267         }
 268
 269         do {
 270                 val1 = val2;
 271                 err = qt1010_readreg(priv, reg, &val2);
 272                 if (err) return err;
 273                 dprintk("compare reg:%02x %02x %02x", reg, val1, val2);
 274         } while (val1 != val2);
 275         *retval = val1;
 276
 277         return qt1010_writereg(priv, 0x1e, 0x00);
 278 }
 279
 280
 281 static u8 qt1010_init_meas2(struct qt1010_priv *priv, u8 reg_init_val, u8 *retval)
 282 {
 283         u8 i, val;
 284         int err;
 285         qt1010_i2c_oper_t i2c_data[] = {
 286                 { QT1010_WR, 0x07, reg_init_val },
 287                 { QT1010_WR, 0x22, 0xd0 },
 288                 { QT1010_WR, 0x1e, 0x00 },
 289                 { QT1010_WR, 0x1e, 0xd0 },
 290                 { QT1010_RD, 0x22, 0xff },
 291                 { QT1010_WR, 0x1e, 0x00 },
 292                 { QT1010_WR, 0x22, 0xff }
 293         };
 294         for (i = 0; i < sizeof(i2c_data) / sizeof(*i2c_data); i++) {
 295                 if (i2c_data[i].oper == QT1010_WR) {
 296                         err = qt1010_writereg(priv, i2c_data[i].reg, i2c_data[i].val);
 297                 } else {
 298                         err = qt1010_readreg(priv, i2c_data[i].reg, &val);
 299                 }
 300                 if (err) return err;
 301         }
 302         *retval = val;
 303         return 0;
 304 }
 305
 306 static int qt1010_init(struct dvb_frontend *fe)
 307 {
 308         struct qt1010_priv *priv = fe->tuner_priv;
 309         struct dvb_frontend_parameters params;
 310         int err;
 311         u8 i, tmpval, *valptr = NULL;
 312
 313         qt1010_i2c_oper_t i2c_data[] = {
 314                 { QT1010_WR, 0x01, 0x80 },
 315                 { QT1010_WR, 0x0d, 0x84 },
 316                 { QT1010_WR, 0x0e, 0xb7 },
 317                 { QT1010_WR, 0x2a, 0x23 },
 318                 { QT1010_WR, 0x2c, 0xdc },
 319                 { QT1010_M1, 0x25, 0x40 }, /* get reg 25 init value */
 320                 { QT1010_M1, 0x81, 0xff }, /* get reg 25 init value */
 321                 { QT1010_WR, 0x2b, 0x70 },
 322                 { QT1010_WR, 0x2a, 0x23 },
 323                 { QT1010_M1, 0x26, 0x08 },
 324                 { QT1010_M1, 0x82, 0xff },
 325                 { QT1010_WR, 0x05, 0x14 },
 326                 { QT1010_WR, 0x06, 0x44 },
 327                 { QT1010_WR, 0x07, 0x28 },
 328                 { QT1010_WR, 0x08, 0x0b },
 329                 { QT1010_WR, 0x11, 0xfd },
 330                 { QT1010_M1, 0x22, 0x0d },
 331                 { QT1010_M1, 0xd0, 0xff },
 332                 { QT1010_WR, 0x06, 0x40 },
 333                 { QT1010_WR, 0x16, 0xf0 },
 334                 { QT1010_WR, 0x02, 0x38 },
 335                 { QT1010_WR, 0x03, 0x18 },
 336                 { QT1010_WR, 0x20, 0xe0 },
 337                 { QT1010_M1, 0x1f, 0x20 }, /* get reg 1f init value */
 338                 { QT1010_M1, 0x84, 0xff }, /* get reg 1f init value */
 339                 { QT1010_RD, 0x20, 0x20 }, /* get reg 20 init value */
 340                 { QT1010_WR, 0x03, 0x19 },
 341                 { QT1010_WR, 0x02, 0x3f },
 342                 { QT1010_WR, 0x21, 0x53 },
 343                 { QT1010_RD, 0x21, 0xff },
 344                 { QT1010_WR, 0x11, 0xfd },
 345                 { QT1010_WR, 0x05, 0x34 },
 346                 { QT1010_WR, 0x06, 0x44 },
 347                 { QT1010_WR, 0x08, 0x08 }
 348         };
 349
 350         for (i = 0; i < sizeof(i2c_data) / sizeof(*i2c_data); i++) {
 351                 switch (i2c_data[i].oper) {
 352                 case QT1010_WR:
 353                         err = qt1010_writereg(priv, i2c_data[i].reg, i2c_data[i].val);
 354                         break;
 355                 case QT1010_RD:
 356                         if (i2c_data[i].val == 0x20) valptr = &priv->reg20_init_val;
 357                         else valptr = &tmpval;
 358                         err = qt1010_readreg(priv, i2c_data[i].reg, valptr);
 359                         break;
 360                 case QT1010_M1:
 361                         if (i2c_data[i].val == 0x25) valptr = &priv->reg25_init_val;
 362                         else if (i2c_data[i].val == 0x1f) valptr = &priv->reg1f_init_val;
 363                         else valptr = &tmpval;
 364                         err = qt1010_init_meas1(priv, i2c_data[i+1].reg, i2c_data[i].reg,
 365                                                       i2c_data[i].val, valptr);
 366                         i++;
 367                         break;
 368                 }
 369                 if (err) return err;
 370         }
 371
 372         for (i = 0x31; i < 0x3a; i++) /* 0x31 - 0x39 */
 373                 if ((err = qt1010_init_meas2(priv, i, &tmpval)))
 374                         return err;
 375
 376         params.frequency = 545000000; /* Sigmatek DVB-110 545000000 */
 377                                       /* MSI Megasky 580 GL861 533000000 */
 378         return qt1010_set_params(fe, &params);
 379 }
 380
 381 static int qt1010_release(struct dvb_frontend *fe)
 382 {
 383         kfree(fe->tuner_priv);
 384         fe->tuner_priv = NULL;
 385         return 0;
 386 }
 387
 388 static int qt1010_get_frequency(struct dvb_frontend *fe, u32 *frequency)
 389 {
 390         struct qt1010_priv *priv = fe->tuner_priv;
 391         *frequency = priv->frequency;
 392         return 0;
 393 }
 394
 395 static int qt1010_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
 396 {
 397         struct qt1010_priv *priv = fe->tuner_priv;
 398         *bandwidth = priv->bandwidth;
 399         return 0;
 400 }
 401
 402 static const struct dvb_tuner_ops qt1010_tuner_ops = {
 403         .info = {
 404                 .name           = "Quantek QT1010",
 405                 .frequency_min  = QT1010_MIN_FREQ,
 406                 .frequency_max  = QT1010_MAX_FREQ,
 407                 .frequency_step = QT1010_STEP,
 408         },
 409
 410         .release       = qt1010_release,
 411         .init          = qt1010_init,
 412         /* TODO: implement sleep */
 413
 414         .set_params    = qt1010_set_params,
 415         .get_frequency = qt1010_get_frequency,
 416         .get_bandwidth = qt1010_get_bandwidth
 417 };
 418
 419 struct dvb_frontend * qt1010_attach(struct dvb_frontend *fe,
 420                                     struct i2c_adapter *i2c,
 421                                     struct qt1010_config *cfg)
 422 {
 423         struct qt1010_priv *priv = NULL;
 424         u8 id;
 425
 426         priv = kzalloc(sizeof(struct qt1010_priv), GFP_KERNEL);
 427         if (priv == NULL)
 428                 return NULL;
 429
 430         priv->cfg      = cfg;
 431         priv->i2c      = i2c;
 432
 433
 434         /* Try to detect tuner chip. Probably this is not correct register. */
 435         if (qt1010_readreg(priv, 0x29, &id) != 0 || (id != 0x39)) {
 436                 kfree(priv);
 437                 return NULL;
 438         }
 439
 440         printk(KERN_INFO "Quantek QT1010 successfully identified.\n");
 441         memcpy(&fe->ops.tuner_ops, &qt1010_tuner_ops, sizeof(struct dvb_tuner_ops));
 442
 443         fe->tuner_priv = priv;
 444         return fe;
 445 }
 446 EXPORT_SYMBOL(qt1010_attach);
 447
 448 MODULE_DESCRIPTION("Quantek QT1010 silicon tuner driver");
 449 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 450 MODULE_AUTHOR("Aapo Tahkola <aet@rasterburn.org>");
 451 MODULE_VERSION("0.1");
 452 MODULE_LICENSE("GPL");