drivers/media/dvb/frontends/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 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...) \
  29         do { \
  30                 if (debug) printk(KERN_DEBUG "QT1010: " args); \
  31         } while (0)
  32
  33 /* read single register */
  34 static int qt1010_readreg(struct qt1010_priv *priv, u8 reg, u8 *val)
  35 {
  36         struct i2c_msg msg[2] = {
  37                 { .addr = priv->cfg->i2c_address,
  38                   .flags = 0, .buf = &reg, .len = 1 },
  39                 { .addr = priv->cfg->i2c_address,
  40                   .flags = I2C_M_RD, .buf = val, .len = 1 },
  41         };
  42
  43         if (i2c_transfer(priv->i2c, msg, 2) != 2) {
  44                 printk(KERN_WARNING "qt1010 I2C read failed\n");
  45                 return -EREMOTEIO;
  46         }
  47         return 0;
  48 }
  49
  50 /* write single register */
  51 static int qt1010_writereg(struct qt1010_priv *priv, u8 reg, u8 val)
  52 {
  53         u8 buf[2] = { reg, val };
  54         struct i2c_msg msg = { .addr = priv->cfg->i2c_address,
  55                                .flags = 0, .buf = buf, .len = 2 };
  56
  57         if (i2c_transfer(priv->i2c, &msg, 1) != 1) {
  58                 printk(KERN_WARNING "qt1010 I2C write failed\n");
  59                 return -EREMOTEIO;
  60         }
  61         return 0;
  62 }
  63
  64 /* dump all registers */
  65 static void qt1010_dump_regs(struct qt1010_priv *priv)
  66 {
  67         char buf[52], buf2[4];
  68         u8 reg, val;
  69
  70         for (reg = 0; ; reg++) {
  71                 if (reg % 16 == 0) {
  72                         if (reg)
  73                                 printk("%s\n", buf);
  74                         sprintf(buf, "%02x: ", reg);
  75                 }
  76                 if (qt1010_readreg(priv, reg, &val) == 0)
  77                         sprintf(buf2, "%02x ", val);
  78                 else
  79                         strcpy(buf2, "-- ");
  80                 strcat(buf, buf2);
  81                 if (reg == 0x2f)
  82                         break;
  83         }
  84         printk("%s\n", buf);
  85 }
  86
  87 static int qt1010_set_params(struct dvb_frontend *fe,
  88                              struct dvb_frontend_parameters *params)
  89 {
  90         struct qt1010_priv *priv;
  91         int err;
  92         u32 freq, div, mod1, mod2;
  93         u8 i, tmpval, reg05;
  94         qt1010_i2c_oper_t rd[48] = {
  95                 { QT1010_WR, 0x01, 0x80 },
  96                 { QT1010_WR, 0x02, 0x3f },
  97                 { QT1010_WR, 0x05, 0xff }, /* 02 c write */
  98                 { QT1010_WR, 0x06, 0x44 },
  99                 { QT1010_WR, 0x07, 0xff }, /* 04 c write */
 100                 { QT1010_WR, 0x08, 0x08 },
 101                 { QT1010_WR, 0x09, 0xff }, /* 06 c write */
 102                 { QT1010_WR, 0x0a, 0xff }, /* 07 c write */
 103                 { QT1010_WR, 0x0b, 0xff }, /* 08 c write */
 104                 { QT1010_WR, 0x0c, 0xe1 },
 105                 { QT1010_WR, 0x1a, 0xff }, /* 10 c write */
 106                 { QT1010_WR, 0x1b, 0x00 },
 107                 { QT1010_WR, 0x1c, 0x89 },
 108                 { QT1010_WR, 0x11, 0xff }, /* 13 c write */
 109                 { QT1010_WR, 0x12, 0xff }, /* 14 c write */
 110                 { QT1010_WR, 0x22, 0xff }, /* 15 c write */
 111                 { QT1010_WR, 0x1e, 0x00 },
 112                 { QT1010_WR, 0x1e, 0xd0 },
 113                 { QT1010_RD, 0x22, 0xff }, /* 16 c read */
 114                 { QT1010_WR, 0x1e, 0x00 },
 115                 { QT1010_RD, 0x05, 0xff }, /* 20 c read */
 116                 { QT1010_RD, 0x22, 0xff }, /* 21 c read */
 117                 { QT1010_WR, 0x23, 0xd0 },
 118                 { QT1010_WR, 0x1e, 0x00 },
 119                 { QT1010_WR, 0x1e, 0xe0 },
 120                 { QT1010_RD, 0x23, 0xff }, /* 25 c read */
 121                 { QT1010_RD, 0x23, 0xff }, /* 26 c read */
 122                 { QT1010_WR, 0x1e, 0x00 },
 123                 { QT1010_WR, 0x24, 0xd0 },
 124                 { QT1010_WR, 0x1e, 0x00 },
 125                 { QT1010_WR, 0x1e, 0xf0 },
 126                 { QT1010_RD, 0x24, 0xff }, /* 31 c read */
 127                 { QT1010_WR, 0x1e, 0x00 },
 128                 { QT1010_WR, 0x14, 0x7f },
 129                 { QT1010_WR, 0x15, 0x7f },
 130                 { QT1010_WR, 0x05, 0xff }, /* 35 c write */
 131                 { QT1010_WR, 0x06, 0x00 },
 132                 { QT1010_WR, 0x15, 0x1f },
 133                 { QT1010_WR, 0x16, 0xff },
 134                 { QT1010_WR, 0x18, 0xff },
 135                 { QT1010_WR, 0x1f, 0xff }, /* 40 c write */
 136                 { QT1010_WR, 0x20, 0xff }, /* 41 c write */
 137                 { QT1010_WR, 0x21, 0x53 },
 138                 { QT1010_WR, 0x25, 0xff }, /* 43 c write */
 139                 { QT1010_WR, 0x26, 0x15 },
 140                 { QT1010_WR, 0x00, 0xff }, /* 45 c write */
 141                 { QT1010_WR, 0x02, 0x00 },
 142                 { QT1010_WR, 0x01, 0x00 }
 143         };
 144
 145 #define FREQ1 32000000 /* 32 MHz */
 146 #define FREQ2  4000000 /* 4 MHz Quartz oscillator in the stick? */
 147
 148         priv = fe->tuner_priv;
 149         freq = params->frequency;
 150         div = (freq + QT1010_OFFSET) / QT1010_STEP;
 151         freq = (div * QT1010_STEP) - QT1010_OFFSET;
 152         mod1 = (freq + QT1010_OFFSET) % FREQ1;
 153         mod2 = (freq + QT1010_OFFSET) % FREQ2;
 154         priv->bandwidth =
 155                 (fe->ops.info.type == FE_OFDM) ? params->u.ofdm.bandwidth : 0;
 156         priv->frequency = freq;
 157
 158         if (fe->ops.i2c_gate_ctrl)
 159                 fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */
 160
 161         /* reg 05 base value */
 162         if      (freq < 290000000) reg05 = 0x14; /* 290 MHz */
 163         else if (freq < 610000000) reg05 = 0x34; /* 610 MHz */
 164         else if (freq < 802000000) reg05 = 0x54; /* 802 MHz */
 165         else                       reg05 = 0x74;
 166
 167         /* 0x5 */
 168         rd[2].val = reg05;
 169
 170         /* 07 - set frequency: 32 MHz scale */
 171         rd[4].val = (freq + QT1010_OFFSET) / FREQ1;
 172
 173         /* 09 - changes every 8/24 MHz */
 174         if (mod1 < 8000000) rd[6].val = 0x1d;
 175         else                rd[6].val = 0x1c;
 176
 177         /* 0a - set frequency: 4 MHz scale (max 28 MHz) */
 178         if      (mod1 < 1*FREQ2) rd[7].val = 0x09; /*  +0 MHz */
 179         else if (mod1 < 2*FREQ2) rd[7].val = 0x08; /*  +4 MHz */
 180         else if (mod1 < 3*FREQ2) rd[7].val = 0x0f; /*  +8 MHz */
 181         else if (mod1 < 4*FREQ2) rd[7].val = 0x0e; /* +12 MHz */
 182         else if (mod1 < 5*FREQ2) rd[7].val = 0x0d; /* +16 MHz */
 183         else if (mod1 < 6*FREQ2) rd[7].val = 0x0c; /* +20 MHz */
 184         else if (mod1 < 7*FREQ2) rd[7].val = 0x0b; /* +24 MHz */
 185         else                     rd[7].val = 0x0a; /* +28 MHz */
 186
 187         /* 0b - changes every 2/2 MHz */
 188         if (mod2 < 2000000) rd[8].val = 0x45;
 189         else                rd[8].val = 0x44;
 190
 191         /* 1a - set frequency: 125 kHz scale (max 3875 kHz)*/
 192         tmpval = 0x78; /* byte, overflows intentionally */
 193         rd[10].val = tmpval-((mod2/QT1010_STEP)*0x08);
 194
 195         /* 11 */
 196         rd[13].val = 0xfd; /* TODO: correct value calculation */
 197
 198         /* 12 */
 199         rd[14].val = 0x91; /* TODO: correct value calculation */
 200
 201         /* 22 */
 202         if      (freq < 450000000) rd[15].val = 0xd0; /* 450 MHz */
 203         else if (freq < 482000000) rd[15].val = 0xd1; /* 482 MHz */
 204         else if (freq < 514000000) rd[15].val = 0xd4; /* 514 MHz */
 205         else if (freq < 546000000) rd[15].val = 0xd7; /* 546 MHz */
 206         else if (freq < 610000000) rd[15].val = 0xda; /* 610 MHz */
 207         else                       rd[15].val = 0xd0;
 208
 209         /* 05 */
 210         rd[35].val = (reg05 & 0xf0);
 211
 212         /* 1f */
 213         if      (mod1 <  8000000) tmpval = 0x00;
 214         else if (mod1 < 12000000) tmpval = 0x01;
 215         else if (mod1 < 16000000) tmpval = 0x02;
 216         else if (mod1 < 24000000) tmpval = 0x03;
 217         else if (mod1 < 28000000) tmpval = 0x04;
 218         else                      tmpval = 0x05;
 219         rd[40].val = (priv->reg1f_init_val + 0x0e + tmpval);
 220
 221         /* 20 */
 222         if      (mod1 <  8000000) tmpval = 0x00;
 223         else if (mod1 < 12000000) tmpval = 0x01;
 224         else if (mod1 < 20000000) tmpval = 0x02;
 225         else if (mod1 < 24000000) tmpval = 0x03;
 226         else if (mod1 < 28000000) tmpval = 0x04;
 227         else                      tmpval = 0x05;
 228         rd[41].val = (priv->reg20_init_val + 0x0d + tmpval);
 229
 230         /* 25 */
 231         rd[43].val = priv->reg25_init_val;
 232
 233         /* 00 */
 234         rd[45].val = 0x92; /* TODO: correct value calculation */
 235
 236         dprintk("freq:%u 05:%02x 07:%02x 09:%02x 0a:%02x 0b:%02x " \
 237                 "1a:%02x 11:%02x 12:%02x 22:%02x 05:%02x 1f:%02x " \
 238                 "20:%02x 25:%02x 00:%02x", \
 239                 freq, rd[2].val, rd[4].val, rd[6].val, rd[7].val, rd[8].val, \
 240                 rd[10].val, rd[13].val, rd[14].val, rd[15].val, rd[35].val, \
 241                 rd[40].val, rd[41].val, rd[43].val, rd[45].val);
 242
 243         for (i = 0; i < ARRAY_SIZE(rd); i++) {
 244                 if (rd[i].oper == QT1010_WR) {
 245                         err = qt1010_writereg(priv, rd[i].reg, rd[i].val);
 246                 } else { /* read is required to proper locking */
 247                         err = qt1010_readreg(priv, rd[i].reg, &tmpval);
 248                 }
 249                 if (err) return err;
 250         }
 251
 252         if (debug)
 253                 qt1010_dump_regs(priv);
 254
 255         if (fe->ops.i2c_gate_ctrl)
 256                 fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */
 257
 258         return 0;
 259 }
 260
 261 static int qt1010_init_meas1(struct qt1010_priv *priv,
 262                              u8 oper, u8 reg, u8 reg_init_val, u8 *retval)
 263 {
 264         u8 i, val1, val2;
 265         int err;
 266
 267         qt1010_i2c_oper_t i2c_data[] = {
 268                 { QT1010_WR, reg, reg_init_val },
 269                 { QT1010_WR, 0x1e, 0x00 },
 270                 { QT1010_WR, 0x1e, oper },
 271                 { QT1010_RD, reg, 0xff }
 272         };
 273
 274         for (i = 0; i < ARRAY_SIZE(i2c_data); i++) {
 275                 if (i2c_data[i].oper == QT1010_WR) {
 276                         err = qt1010_writereg(priv, i2c_data[i].reg,
 277                                               i2c_data[i].val);
 278                 } else {
 279                         err = qt1010_readreg(priv, i2c_data[i].reg, &val2);
 280                 }
 281                 if (err) return err;
 282         }
 283
 284         do {
 285                 val1 = val2;
 286                 err = qt1010_readreg(priv, reg, &val2);
 287                 if (err) return err;
 288                 dprintk("compare reg:%02x %02x %02x", reg, val1, val2);
 289         } while (val1 != val2);
 290         *retval = val1;
 291
 292         return qt1010_writereg(priv, 0x1e, 0x00);
 293 }
 294
 295 static u8 qt1010_init_meas2(struct qt1010_priv *priv,
 296                             u8 reg_init_val, u8 *retval)
 297 {
 298         u8 i, val;
 299         int err;
 300         qt1010_i2c_oper_t i2c_data[] = {
 301                 { QT1010_WR, 0x07, reg_init_val },
 302                 { QT1010_WR, 0x22, 0xd0 },
 303                 { QT1010_WR, 0x1e, 0x00 },
 304                 { QT1010_WR, 0x1e, 0xd0 },
 305                 { QT1010_RD, 0x22, 0xff },
 306                 { QT1010_WR, 0x1e, 0x00 },
 307                 { QT1010_WR, 0x22, 0xff }
 308         };
 309         for (i = 0; i < ARRAY_SIZE(i2c_data); i++) {
 310                 if (i2c_data[i].oper == QT1010_WR) {
 311                         err = qt1010_writereg(priv, i2c_data[i].reg,
 312                                               i2c_data[i].val);
 313                 } else {
 314                         err = qt1010_readreg(priv, i2c_data[i].reg, &val);
 315                 }
 316                 if (err) return err;
 317         }
 318         *retval = val;
 319         return 0;
 320 }
 321
 322 static int qt1010_init(struct dvb_frontend *fe)
 323 {
 324         struct qt1010_priv *priv = fe->tuner_priv;
 325         struct dvb_frontend_parameters params;
 326         int err = 0;
 327         u8 i, tmpval, *valptr = NULL;
 328
 329         qt1010_i2c_oper_t i2c_data[] = {
 330                 { QT1010_WR, 0x01, 0x80 },
 331                 { QT1010_WR, 0x0d, 0x84 },
 332                 { QT1010_WR, 0x0e, 0xb7 },
 333                 { QT1010_WR, 0x2a, 0x23 },
 334                 { QT1010_WR, 0x2c, 0xdc },
 335                 { QT1010_M1, 0x25, 0x40 }, /* get reg 25 init value */
 336                 { QT1010_M1, 0x81, 0xff }, /* get reg 25 init value */
 337                 { QT1010_WR, 0x2b, 0x70 },
 338                 { QT1010_WR, 0x2a, 0x23 },
 339                 { QT1010_M1, 0x26, 0x08 },
 340                 { QT1010_M1, 0x82, 0xff },
 341                 { QT1010_WR, 0x05, 0x14 },
 342                 { QT1010_WR, 0x06, 0x44 },
 343                 { QT1010_WR, 0x07, 0x28 },
 344                 { QT1010_WR, 0x08, 0x0b },
 345                 { QT1010_WR, 0x11, 0xfd },
 346                 { QT1010_M1, 0x22, 0x0d },
 347                 { QT1010_M1, 0xd0, 0xff },
 348                 { QT1010_WR, 0x06, 0x40 },
 349                 { QT1010_WR, 0x16, 0xf0 },
 350                 { QT1010_WR, 0x02, 0x38 },
 351                 { QT1010_WR, 0x03, 0x18 },
 352                 { QT1010_WR, 0x20, 0xe0 },
 353                 { QT1010_M1, 0x1f, 0x20 }, /* get reg 1f init value */
 354                 { QT1010_M1, 0x84, 0xff }, /* get reg 1f init value */
 355                 { QT1010_RD, 0x20, 0x20 }, /* get reg 20 init value */
 356                 { QT1010_WR, 0x03, 0x19 },
 357                 { QT1010_WR, 0x02, 0x3f },
 358                 { QT1010_WR, 0x21, 0x53 },
 359                 { QT1010_RD, 0x21, 0xff },
 360                 { QT1010_WR, 0x11, 0xfd },
 361                 { QT1010_WR, 0x05, 0x34 },
 362                 { QT1010_WR, 0x06, 0x44 },
 363                 { QT1010_WR, 0x08, 0x08 }
 364         };
 365
 366         if (fe->ops.i2c_gate_ctrl)
 367                 fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */
 368
 369         for (i = 0; i < ARRAY_SIZE(i2c_data); i++) {
 370                 switch (i2c_data[i].oper) {
 371                 case QT1010_WR:
 372                         err = qt1010_writereg(priv, i2c_data[i].reg,
 373                                               i2c_data[i].val);
 374                         break;
 375                 case QT1010_RD:
 376                         if (i2c_data[i].val == 0x20)
 377                                 valptr = &priv->reg20_init_val;
 378                         else
 379                                 valptr = &tmpval;
 380                         err = qt1010_readreg(priv, i2c_data[i].reg, valptr);
 381                         break;
 382                 case QT1010_M1:
 383                         if (i2c_data[i].val == 0x25)
 384                                 valptr = &priv->reg25_init_val;
 385                         else if (i2c_data[i].val == 0x1f)
 386                                 valptr = &priv->reg1f_init_val;
 387                         else
 388                                 valptr = &tmpval;
 389                         err = qt1010_init_meas1(priv, i2c_data[i+1].reg,
 390                                                 i2c_data[i].reg,
 391                                                 i2c_data[i].val, valptr);
 392                         i++;
 393                         break;
 394                 }
 395                 if (err) return err;
 396         }
 397
 398         for (i = 0x31; i < 0x3a; i++) /* 0x31 - 0x39 */
 399                 if ((err = qt1010_init_meas2(priv, i, &tmpval)))
 400                         return err;
 401
 402         params.frequency = 545000000; /* Sigmatek DVB-110 545000000 */
 403                                       /* MSI Megasky 580 GL861 533000000 */
 404         return qt1010_set_params(fe, &params);
 405 }
 406
 407 static int qt1010_release(struct dvb_frontend *fe)
 408 {
 409         kfree(fe->tuner_priv);
 410         fe->tuner_priv = NULL;
 411         return 0;
 412 }
 413
 414 static int qt1010_get_frequency(struct dvb_frontend *fe, u32 *frequency)
 415 {
 416         struct qt1010_priv *priv = fe->tuner_priv;
 417         *frequency = priv->frequency;
 418         return 0;
 419 }
 420
 421 static int qt1010_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
 422 {
 423         struct qt1010_priv *priv = fe->tuner_priv;
 424         *bandwidth = priv->bandwidth;
 425         return 0;
 426 }
 427
 428 static const struct dvb_tuner_ops qt1010_tuner_ops = {
 429         .info = {
 430                 .name           = "Quantek QT1010",
 431                 .frequency_min  = QT1010_MIN_FREQ,
 432                 .frequency_max  = QT1010_MAX_FREQ,
 433                 .frequency_step = QT1010_STEP,
 434         },
 435
 436         .release       = qt1010_release,
 437         .init          = qt1010_init,
 438         /* TODO: implement sleep */
 439
 440         .set_params    = qt1010_set_params,
 441         .get_frequency = qt1010_get_frequency,
 442         .get_bandwidth = qt1010_get_bandwidth
 443 };
 444
 445 struct dvb_frontend * qt1010_attach(struct dvb_frontend *fe,
 446                                     struct i2c_adapter *i2c,
 447                                     struct qt1010_config *cfg)
 448 {
 449         struct qt1010_priv *priv = NULL;
 450         u8 id;
 451
 452         priv = kzalloc(sizeof(struct qt1010_priv), GFP_KERNEL);
 453         if (priv == NULL)
 454                 return NULL;
 455
 456         priv->cfg = cfg;
 457         priv->i2c = i2c;
 458
 459         if (fe->ops.i2c_gate_ctrl)
 460                 fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */
 461
 462
 463         /* Try to detect tuner chip. Probably this is not correct register. */
 464         if (qt1010_readreg(priv, 0x29, &id) != 0 || (id != 0x39)) {
 465                 kfree(priv);
 466                 return NULL;
 467         }
 468
 469         if (fe->ops.i2c_gate_ctrl)
 470                 fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */
 471
 472         printk(KERN_INFO "Quantek QT1010 successfully identified.\n");
 473         memcpy(&fe->ops.tuner_ops, &qt1010_tuner_ops,
 474                sizeof(struct dvb_tuner_ops));
 475
 476         fe->tuner_priv = priv;
 477         return fe;
 478 }
 479 EXPORT_SYMBOL(qt1010_attach);
 480
 481 MODULE_DESCRIPTION("Quantek QT1010 silicon tuner driver");
 482 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 483 MODULE_AUTHOR("Aapo Tahkola <aet@rasterburn.org>");
 484 MODULE_VERSION("0.1");
 485 MODULE_LICENSE("GPL");