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 = ®, .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, 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 }; 226 227 for (i = 0; i < ARRAY_SIZE(i2c_data); i++) { 228 err = qt1010_writereg(priv, i2c_data[i].reg, 229 i2c_data[i].val); 230 if (err) 231 return err; 232 } 233 234 err = qt1010_readreg(priv, reg, &val2); 235 if (err) 236 return err; 237 do { 238 val1 = val2; 239 err = qt1010_readreg(priv, reg, &val2); 240 if (err) 241 return err; 242 243 dev_dbg(&priv->i2c->dev, "%s: compare reg:%02x %02x %02x\n", 244 __func__, reg, val1, val2); 245 } while (val1 != val2); 246 *retval = val1; 247 248 return qt1010_writereg(priv, 0x1e, 0x00); 249 } 250 251 static int qt1010_init_meas2(struct qt1010_priv *priv, 252 u8 reg_init_val, u8 *retval) 253 { 254 u8 i, val = 0xff; 255 int err; 256 qt1010_i2c_oper_t i2c_data[] = { 257 { QT1010_WR, 0x07, reg_init_val }, 258 { QT1010_WR, 0x22, 0xd0 }, 259 { QT1010_WR, 0x1e, 0x00 }, 260 { QT1010_WR, 0x1e, 0xd0 }, 261 { QT1010_RD, 0x22, 0xff }, 262 { QT1010_WR, 0x1e, 0x00 }, 263 { QT1010_WR, 0x22, 0xff } 264 }; 265 266 for (i = 0; i < ARRAY_SIZE(i2c_data); i++) { 267 if (i2c_data[i].oper == QT1010_WR) { 268 err = qt1010_writereg(priv, i2c_data[i].reg, 269 i2c_data[i].val); 270 } else { 271 err = qt1010_readreg(priv, i2c_data[i].reg, &val); 272 } 273 if (err) 274 return err; 275 } 276 *retval = val; 277 return 0; 278 } 279 280 static int qt1010_init(struct dvb_frontend *fe) 281 { 282 struct qt1010_priv *priv = fe->tuner_priv; 283 struct dtv_frontend_properties *c = &fe->dtv_property_cache; 284 int err = 0; 285 u8 i, tmpval, *valptr = NULL; 286 287 static const qt1010_i2c_oper_t i2c_data[] = { 288 { QT1010_WR, 0x01, 0x80 }, 289 { QT1010_WR, 0x0d, 0x84 }, 290 { QT1010_WR, 0x0e, 0xb7 }, 291 { QT1010_WR, 0x2a, 0x23 }, 292 { QT1010_WR, 0x2c, 0xdc }, 293 { QT1010_M1, 0x25, 0x40 }, /* get reg 25 init value */ 294 { QT1010_M1, 0x81, 0xff }, /* get reg 25 init value */ 295 { QT1010_WR, 0x2b, 0x70 }, 296 { QT1010_WR, 0x2a, 0x23 }, 297 { QT1010_M1, 0x26, 0x08 }, 298 { QT1010_M1, 0x82, 0xff }, 299 { QT1010_WR, 0x05, 0x14 }, 300 { QT1010_WR, 0x06, 0x44 }, 301 { QT1010_WR, 0x07, 0x28 }, 302 { QT1010_WR, 0x08, 0x0b }, 303 { QT1010_WR, 0x11, 0xfd }, 304 { QT1010_M1, 0x22, 0x0d }, 305 { QT1010_M1, 0xd0, 0xff }, 306 { QT1010_WR, 0x06, 0x40 }, 307 { QT1010_WR, 0x16, 0xf0 }, 308 { QT1010_WR, 0x02, 0x38 }, 309 { QT1010_WR, 0x03, 0x18 }, 310 { QT1010_WR, 0x20, 0xe0 }, 311 { QT1010_M1, 0x1f, 0x20 }, /* get reg 1f init value */ 312 { QT1010_M1, 0x84, 0xff }, /* get reg 1f init value */ 313 { QT1010_RD, 0x20, 0x20 }, /* get reg 20 init value */ 314 { QT1010_WR, 0x03, 0x19 }, 315 { QT1010_WR, 0x02, 0x3f }, 316 { QT1010_WR, 0x21, 0x53 }, 317 { QT1010_RD, 0x21, 0xff }, 318 { QT1010_WR, 0x11, 0xfd }, 319 { QT1010_WR, 0x05, 0x34 }, 320 { QT1010_WR, 0x06, 0x44 }, 321 { QT1010_WR, 0x08, 0x08 } 322 }; 323 324 if (fe->ops.i2c_gate_ctrl) 325 fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */ 326 327 for (i = 0; i < ARRAY_SIZE(i2c_data); i++) { 328 switch (i2c_data[i].oper) { 329 case QT1010_WR: 330 err = qt1010_writereg(priv, i2c_data[i].reg, 331 i2c_data[i].val); 332 break; 333 case QT1010_RD: 334 if (i2c_data[i].val == 0x20) 335 valptr = &priv->reg20_init_val; 336 else 337 valptr = &tmpval; 338 err = qt1010_readreg(priv, i2c_data[i].reg, valptr); 339 break; 340 case QT1010_M1: 341 if (i2c_data[i].val == 0x25) 342 valptr = &priv->reg25_init_val; 343 else if (i2c_data[i].val == 0x1f) 344 valptr = &priv->reg1f_init_val; 345 else 346 valptr = &tmpval; 347 348 BUG_ON(i >= ARRAY_SIZE(i2c_data) - 1); 349 350 err = qt1010_init_meas1(priv, i2c_data[i+1].reg, 351 i2c_data[i].reg, 352 i2c_data[i].val, valptr); 353 i++; 354 break; 355 } 356 if (err) 357 return err; 358 } 359 360 for (i = 0x31; i < 0x3a; i++) /* 0x31 - 0x39 */ 361 if ((err = qt1010_init_meas2(priv, i, &tmpval))) 362 return err; 363 364 if (!c->frequency) 365 c->frequency = 545000000; /* Sigmatek DVB-110 545000000 */ 366 /* MSI Megasky 580 GL861 533000000 */ 367 return qt1010_set_params(fe); 368 } 369 370 static void qt1010_release(struct dvb_frontend *fe) 371 { 372 kfree(fe->tuner_priv); 373 fe->tuner_priv = NULL; 374 } 375 376 static int qt1010_get_frequency(struct dvb_frontend *fe, u32 *frequency) 377 { 378 struct qt1010_priv *priv = fe->tuner_priv; 379 *frequency = priv->frequency; 380 return 0; 381 } 382 383 static int qt1010_get_if_frequency(struct dvb_frontend *fe, u32 *frequency) 384 { 385 *frequency = 36125000; 386 return 0; 387 } 388 389 static const struct dvb_tuner_ops qt1010_tuner_ops = { 390 .info = { 391 .name = "Quantek QT1010", 392 .frequency_min_hz = QT1010_MIN_FREQ, 393 .frequency_max_hz = QT1010_MAX_FREQ, 394 .frequency_step_hz = QT1010_STEP, 395 }, 396 397 .release = qt1010_release, 398 .init = qt1010_init, 399 /* TODO: implement sleep */ 400 401 .set_params = qt1010_set_params, 402 .get_frequency = qt1010_get_frequency, 403 .get_if_frequency = qt1010_get_if_frequency, 404 }; 405 406 struct dvb_frontend * qt1010_attach(struct dvb_frontend *fe, 407 struct i2c_adapter *i2c, 408 struct qt1010_config *cfg) 409 { 410 struct qt1010_priv *priv = NULL; 411 u8 id; 412 413 priv = kzalloc(sizeof(struct qt1010_priv), GFP_KERNEL); 414 if (priv == NULL) 415 return NULL; 416 417 priv->cfg = cfg; 418 priv->i2c = i2c; 419 420 if (fe->ops.i2c_gate_ctrl) 421 fe->ops.i2c_gate_ctrl(fe, 1); /* open i2c_gate */ 422 423 424 /* Try to detect tuner chip. Probably this is not correct register. */ 425 if (qt1010_readreg(priv, 0x29, &id) != 0 || (id != 0x39)) { 426 kfree(priv); 427 return NULL; 428 } 429 430 if (fe->ops.i2c_gate_ctrl) 431 fe->ops.i2c_gate_ctrl(fe, 0); /* close i2c_gate */ 432 433 dev_info(&priv->i2c->dev, 434 "%s: Quantek QT1010 successfully identified\n", 435 KBUILD_MODNAME); 436 437 memcpy(&fe->ops.tuner_ops, &qt1010_tuner_ops, 438 sizeof(struct dvb_tuner_ops)); 439 440 fe->tuner_priv = priv; 441 return fe; 442 } 443 EXPORT_SYMBOL(qt1010_attach); 444 445 MODULE_DESCRIPTION("Quantek QT1010 silicon tuner driver"); 446 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>"); 447 MODULE_AUTHOR("Aapo Tahkola <aet@rasterburn.org>"); 448 MODULE_VERSION("0.1"); 449 MODULE_LICENSE("GPL"); 450