drivers/media/dvb/pt1/va1j5jf8007s.c

   1 /*
   2  * ISDB-S driver for VA1J5JF8007
   3  *
   4  * Copyright (C) 2009 HIRANO Takahito <hiranotaka@zng.info>
   5  *
   6  * based on pt1dvr - http://pt1dvr.sourceforge.jp/
   7  *      by Tomoaki Ishikawa <tomy@users.sourceforge.jp>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22  */
  23
  24 #include <linux/kernel.h>
  25 #include <linux/module.h>
  26 #include <linux/slab.h>
  27 #include <linux/i2c.h>
  28 #include "dvb_frontend.h"
  29 #include "va1j5jf8007s.h"
  30
  31 enum va1j5jf8007s_tune_state {
  32         VA1J5JF8007S_IDLE,
  33         VA1J5JF8007S_SET_FREQUENCY_1,
  34         VA1J5JF8007S_SET_FREQUENCY_2,
  35         VA1J5JF8007S_SET_FREQUENCY_3,
  36         VA1J5JF8007S_CHECK_FREQUENCY,
  37         VA1J5JF8007S_SET_MODULATION,
  38         VA1J5JF8007S_CHECK_MODULATION,
  39         VA1J5JF8007S_SET_TS_ID,
  40         VA1J5JF8007S_CHECK_TS_ID,
  41         VA1J5JF8007S_TRACK,
  42 };
  43
  44 struct va1j5jf8007s_state {
  45         const struct va1j5jf8007s_config *config;
  46         struct i2c_adapter *adap;
  47         struct dvb_frontend fe;
  48         enum va1j5jf8007s_tune_state tune_state;
  49 };
  50
  51 static int va1j5jf8007s_get_frontend_algo(struct dvb_frontend *fe)
  52 {
  53         return DVBFE_ALGO_HW;
  54 }
  55
  56 static int
  57 va1j5jf8007s_read_status(struct dvb_frontend *fe, fe_status_t *status)
  58 {
  59         struct va1j5jf8007s_state *state;
  60
  61         state = fe->demodulator_priv;
  62
  63         switch (state->tune_state) {
  64         case VA1J5JF8007S_IDLE:
  65         case VA1J5JF8007S_SET_FREQUENCY_1:
  66         case VA1J5JF8007S_SET_FREQUENCY_2:
  67         case VA1J5JF8007S_SET_FREQUENCY_3:
  68         case VA1J5JF8007S_CHECK_FREQUENCY:
  69                 *status = 0;
  70                 return 0;
  71
  72
  73         case VA1J5JF8007S_SET_MODULATION:
  74         case VA1J5JF8007S_CHECK_MODULATION:
  75                 *status |= FE_HAS_SIGNAL;
  76                 return 0;
  77
  78         case VA1J5JF8007S_SET_TS_ID:
  79         case VA1J5JF8007S_CHECK_TS_ID:
  80                 *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER;
  81                 return 0;
  82
  83         case VA1J5JF8007S_TRACK:
  84                 *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_LOCK;
  85                 return 0;
  86         }
  87
  88         BUG();
  89 }
  90
  91 struct va1j5jf8007s_cb_map {
  92         u32 frequency;
  93         u8 cb;
  94 };
  95
  96 static const struct va1j5jf8007s_cb_map va1j5jf8007s_cb_maps[] = {
  97         {  986000, 0xb2 },
  98         { 1072000, 0xd2 },
  99         { 1154000, 0xe2 },
 100         { 1291000, 0x20 },
 101         { 1447000, 0x40 },
 102         { 1615000, 0x60 },
 103         { 1791000, 0x80 },
 104         { 1972000, 0xa0 },
 105 };
 106
 107 static u8 va1j5jf8007s_lookup_cb(u32 frequency)
 108 {
 109         int i;
 110         const struct va1j5jf8007s_cb_map *map;
 111
 112         for (i = 0; i < ARRAY_SIZE(va1j5jf8007s_cb_maps); i++) {
 113                 map = &va1j5jf8007s_cb_maps[i];
 114                 if (frequency < map->frequency)
 115                         return map->cb;
 116         }
 117         return 0xc0;
 118 }
 119
 120 static int va1j5jf8007s_set_frequency_1(struct va1j5jf8007s_state *state)
 121 {
 122         u32 frequency;
 123         u16 word;
 124         u8 buf[6];
 125         struct i2c_msg msg;
 126
 127         frequency = state->fe.dtv_property_cache.frequency;
 128
 129         word = (frequency + 500) / 1000;
 130         if (frequency < 1072000)
 131                 word = (word << 1 & ~0x1f) | (word & 0x0f);
 132
 133         buf[0] = 0xfe;
 134         buf[1] = 0xc0;
 135         buf[2] = 0x40 | word >> 8;
 136         buf[3] = word;
 137         buf[4] = 0xe0;
 138         buf[5] = va1j5jf8007s_lookup_cb(frequency);
 139
 140         msg.addr = state->config->demod_address;
 141         msg.flags = 0;
 142         msg.len = sizeof(buf);
 143         msg.buf = buf;
 144
 145         if (i2c_transfer(state->adap, &msg, 1) != 1)
 146                 return -EREMOTEIO;
 147
 148         return 0;
 149 }
 150
 151 static int va1j5jf8007s_set_frequency_2(struct va1j5jf8007s_state *state)
 152 {
 153         u8 buf[3];
 154         struct i2c_msg msg;
 155
 156         buf[0] = 0xfe;
 157         buf[1] = 0xc0;
 158         buf[2] = 0xe4;
 159
 160         msg.addr = state->config->demod_address;
 161         msg.flags = 0;
 162         msg.len = sizeof(buf);
 163         msg.buf = buf;
 164
 165         if (i2c_transfer(state->adap, &msg, 1) != 1)
 166                 return -EREMOTEIO;
 167
 168         return 0;
 169 }
 170
 171 static int va1j5jf8007s_set_frequency_3(struct va1j5jf8007s_state *state)
 172 {
 173         u32 frequency;
 174         u8 buf[4];
 175         struct i2c_msg msg;
 176
 177         frequency = state->fe.dtv_property_cache.frequency;
 178
 179         buf[0] = 0xfe;
 180         buf[1] = 0xc0;
 181         buf[2] = 0xf4;
 182         buf[3] = va1j5jf8007s_lookup_cb(frequency) | 0x4;
 183
 184         msg.addr = state->config->demod_address;
 185         msg.flags = 0;
 186         msg.len = sizeof(buf);
 187         msg.buf = buf;
 188
 189         if (i2c_transfer(state->adap, &msg, 1) != 1)
 190                 return -EREMOTEIO;
 191
 192         return 0;
 193 }
 194
 195 static int
 196 va1j5jf8007s_check_frequency(struct va1j5jf8007s_state *state, int *lock)
 197 {
 198         u8 addr;
 199         u8 write_buf[2], read_buf[1];
 200         struct i2c_msg msgs[2];
 201
 202         addr = state->config->demod_address;
 203
 204         write_buf[0] = 0xfe;
 205         write_buf[1] = 0xc1;
 206
 207         msgs[0].addr = addr;
 208         msgs[0].flags = 0;
 209         msgs[0].len = sizeof(write_buf);
 210         msgs[0].buf = write_buf;
 211
 212         msgs[1].addr = addr;
 213         msgs[1].flags = I2C_M_RD;
 214         msgs[1].len = sizeof(read_buf);
 215         msgs[1].buf = read_buf;
 216
 217         if (i2c_transfer(state->adap, msgs, 2) != 2)
 218                 return -EREMOTEIO;
 219
 220         *lock = read_buf[0] & 0x40;
 221         return 0;
 222 }
 223
 224 static int va1j5jf8007s_set_modulation(struct va1j5jf8007s_state *state)
 225 {
 226         u8 buf[2];
 227         struct i2c_msg msg;
 228
 229         buf[0] = 0x03;
 230         buf[1] = 0x01;
 231
 232         msg.addr = state->config->demod_address;
 233         msg.flags = 0;
 234         msg.len = sizeof(buf);
 235         msg.buf = buf;
 236
 237         if (i2c_transfer(state->adap, &msg, 1) != 1)
 238                 return -EREMOTEIO;
 239
 240         return 0;
 241 }
 242
 243 static int
 244 va1j5jf8007s_check_modulation(struct va1j5jf8007s_state *state, int *lock)
 245 {
 246         u8 addr;
 247         u8 write_buf[1], read_buf[1];
 248         struct i2c_msg msgs[2];
 249
 250         addr = state->config->demod_address;
 251
 252         write_buf[0] = 0xc3;
 253
 254         msgs[0].addr = addr;
 255         msgs[0].flags = 0;
 256         msgs[0].len = sizeof(write_buf);
 257         msgs[0].buf = write_buf;
 258
 259         msgs[1].addr = addr;
 260         msgs[1].flags = I2C_M_RD;
 261         msgs[1].len = sizeof(read_buf);
 262         msgs[1].buf = read_buf;
 263
 264         if (i2c_transfer(state->adap, msgs, 2) != 2)
 265                 return -EREMOTEIO;
 266
 267         *lock = !(read_buf[0] & 0x10);
 268         return 0;
 269 }
 270
 271 static int
 272 va1j5jf8007s_set_ts_id(struct va1j5jf8007s_state *state)
 273 {
 274         u32 ts_id;
 275         u8 buf[3];
 276         struct i2c_msg msg;
 277
 278         ts_id = state->fe.dtv_property_cache.isdbs_ts_id;
 279         if (!ts_id)
 280                 return 0;
 281
 282         buf[0] = 0x8f;
 283         buf[1] = ts_id >> 8;
 284         buf[2] = ts_id;
 285
 286         msg.addr = state->config->demod_address;
 287         msg.flags = 0;
 288         msg.len = sizeof(buf);
 289         msg.buf = buf;
 290
 291         if (i2c_transfer(state->adap, &msg, 1) != 1)
 292                 return -EREMOTEIO;
 293
 294         return 0;
 295 }
 296
 297 static int
 298 va1j5jf8007s_check_ts_id(struct va1j5jf8007s_state *state, int *lock)
 299 {
 300         u8 addr;
 301         u8 write_buf[1], read_buf[2];
 302         struct i2c_msg msgs[2];
 303         u32 ts_id;
 304
 305         ts_id = state->fe.dtv_property_cache.isdbs_ts_id;
 306         if (!ts_id) {
 307                 *lock = 1;
 308                 return 0;
 309         }
 310
 311         addr = state->config->demod_address;
 312
 313         write_buf[0] = 0xe6;
 314
 315         msgs[0].addr = addr;
 316         msgs[0].flags = 0;
 317         msgs[0].len = sizeof(write_buf);
 318         msgs[0].buf = write_buf;
 319
 320         msgs[1].addr = addr;
 321         msgs[1].flags = I2C_M_RD;
 322         msgs[1].len = sizeof(read_buf);
 323         msgs[1].buf = read_buf;
 324
 325         if (i2c_transfer(state->adap, msgs, 2) != 2)
 326                 return -EREMOTEIO;
 327
 328         *lock = (read_buf[0] << 8 | read_buf[1]) == ts_id;
 329         return 0;
 330 }
 331
 332 static int
 333 va1j5jf8007s_tune(struct dvb_frontend *fe,
 334                   struct dvb_frontend_parameters *params,
 335                   unsigned int mode_flags,  unsigned int *delay,
 336                   fe_status_t *status)
 337 {
 338         struct va1j5jf8007s_state *state;
 339         int ret;
 340         int lock;
 341
 342         state = fe->demodulator_priv;
 343
 344         if (params != NULL)
 345                 state->tune_state = VA1J5JF8007S_SET_FREQUENCY_1;
 346
 347         switch (state->tune_state) {
 348         case VA1J5JF8007S_IDLE:
 349                 *delay = 3 * HZ;
 350                 *status = 0;
 351                 return 0;
 352
 353         case VA1J5JF8007S_SET_FREQUENCY_1:
 354                 ret = va1j5jf8007s_set_frequency_1(state);
 355                 if (ret < 0)
 356                         return ret;
 357
 358                 state->tune_state = VA1J5JF8007S_SET_FREQUENCY_2;
 359                 *delay = 0;
 360                 *status = 0;
 361                 return 0;
 362
 363         case VA1J5JF8007S_SET_FREQUENCY_2:
 364                 ret = va1j5jf8007s_set_frequency_2(state);
 365                 if (ret < 0)
 366                         return ret;
 367
 368                 state->tune_state = VA1J5JF8007S_SET_FREQUENCY_3;
 369                 *delay = (HZ + 99) / 100;
 370                 *status = 0;
 371                 return 0;
 372
 373         case VA1J5JF8007S_SET_FREQUENCY_3:
 374                 ret = va1j5jf8007s_set_frequency_3(state);
 375                 if (ret < 0)
 376                         return ret;
 377
 378                 state->tune_state = VA1J5JF8007S_CHECK_FREQUENCY;
 379                 *delay = 0;
 380                 *status = 0;
 381                 return 0;
 382
 383         case VA1J5JF8007S_CHECK_FREQUENCY:
 384                 ret = va1j5jf8007s_check_frequency(state, &lock);
 385                 if (ret < 0)
 386                         return ret;
 387
 388                 if (!lock)  {
 389                         *delay = (HZ + 999) / 1000;
 390                         *status = 0;
 391                         return 0;
 392                 }
 393
 394                 state->tune_state = VA1J5JF8007S_SET_MODULATION;
 395                 *delay = 0;
 396                 *status = FE_HAS_SIGNAL;
 397                 return 0;
 398
 399         case VA1J5JF8007S_SET_MODULATION:
 400                 ret = va1j5jf8007s_set_modulation(state);
 401                 if (ret < 0)
 402                         return ret;
 403
 404                 state->tune_state = VA1J5JF8007S_CHECK_MODULATION;
 405                 *delay = 0;
 406                 *status = FE_HAS_SIGNAL;
 407                 return 0;
 408
 409         case VA1J5JF8007S_CHECK_MODULATION:
 410                 ret = va1j5jf8007s_check_modulation(state, &lock);
 411                 if (ret < 0)
 412                         return ret;
 413
 414                 if (!lock)  {
 415                         *delay = (HZ + 49) / 50;
 416                         *status = FE_HAS_SIGNAL;
 417                         return 0;
 418                 }
 419
 420                 state->tune_state = VA1J5JF8007S_SET_TS_ID;
 421                 *delay = 0;
 422                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
 423                 return 0;
 424
 425         case VA1J5JF8007S_SET_TS_ID:
 426                 ret = va1j5jf8007s_set_ts_id(state);
 427                 if (ret < 0)
 428                         return ret;
 429
 430                 state->tune_state = VA1J5JF8007S_CHECK_TS_ID;
 431                 return 0;
 432
 433         case VA1J5JF8007S_CHECK_TS_ID:
 434                 ret = va1j5jf8007s_check_ts_id(state, &lock);
 435                 if (ret < 0)
 436                         return ret;
 437
 438                 if (!lock)  {
 439                         *delay = (HZ + 99) / 100;
 440                         *status = FE_HAS_SIGNAL | FE_HAS_CARRIER;
 441                         return 0;
 442                 }
 443
 444                 state->tune_state = VA1J5JF8007S_TRACK;
 445                 /* fall through */
 446
 447         case VA1J5JF8007S_TRACK:
 448                 *delay = 3 * HZ;
 449                 *status = FE_HAS_SIGNAL | FE_HAS_CARRIER | FE_HAS_LOCK;
 450                 return 0;
 451         }
 452
 453         BUG();
 454 }
 455
 456 static int va1j5jf8007s_init_frequency(struct va1j5jf8007s_state *state)
 457 {
 458         u8 buf[4];
 459         struct i2c_msg msg;
 460
 461         buf[0] = 0xfe;
 462         buf[1] = 0xc0;
 463         buf[2] = 0xf0;
 464         buf[3] = 0x04;
 465
 466         msg.addr = state->config->demod_address;
 467         msg.flags = 0;
 468         msg.len = sizeof(buf);
 469         msg.buf = buf;
 470
 471         if (i2c_transfer(state->adap, &msg, 1) != 1)
 472                 return -EREMOTEIO;
 473
 474         return 0;
 475 }
 476
 477 static int va1j5jf8007s_set_sleep(struct va1j5jf8007s_state *state, int sleep)
 478 {
 479         u8 buf[2];
 480         struct i2c_msg msg;
 481
 482         buf[0] = 0x17;
 483         buf[1] = sleep ? 0x01 : 0x00;
 484
 485         msg.addr = state->config->demod_address;
 486         msg.flags = 0;
 487         msg.len = sizeof(buf);
 488         msg.buf = buf;
 489
 490         if (i2c_transfer(state->adap, &msg, 1) != 1)
 491                 return -EREMOTEIO;
 492
 493         return 0;
 494 }
 495
 496 static int va1j5jf8007s_sleep(struct dvb_frontend *fe)
 497 {
 498         struct va1j5jf8007s_state *state;
 499         int ret;
 500
 501         state = fe->demodulator_priv;
 502
 503         ret = va1j5jf8007s_init_frequency(state);
 504         if (ret < 0)
 505                 return ret;
 506
 507         return va1j5jf8007s_set_sleep(state, 1);
 508 }
 509
 510 static int va1j5jf8007s_init(struct dvb_frontend *fe)
 511 {
 512         struct va1j5jf8007s_state *state;
 513
 514         state = fe->demodulator_priv;
 515         state->tune_state = VA1J5JF8007S_IDLE;
 516
 517         return va1j5jf8007s_set_sleep(state, 0);
 518 }
 519
 520 static void va1j5jf8007s_release(struct dvb_frontend *fe)
 521 {
 522         struct va1j5jf8007s_state *state;
 523         state = fe->demodulator_priv;
 524         kfree(state);
 525 }
 526
 527 static struct dvb_frontend_ops va1j5jf8007s_ops = {
 528         .info = {
 529                 .name = "VA1J5JF8007 ISDB-S",
 530                 .type = FE_QPSK,
 531                 .frequency_min = 950000,
 532                 .frequency_max = 2150000,
 533                 .frequency_stepsize = 1000,
 534                 .caps = FE_CAN_INVERSION_AUTO | FE_CAN_FEC_AUTO |
 535                         FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO |
 536                         FE_CAN_GUARD_INTERVAL_AUTO | FE_CAN_HIERARCHY_AUTO,
 537         },
 538
 539         .get_frontend_algo = va1j5jf8007s_get_frontend_algo,
 540         .read_status = va1j5jf8007s_read_status,
 541         .tune = va1j5jf8007s_tune,
 542         .sleep = va1j5jf8007s_sleep,
 543         .init = va1j5jf8007s_init,
 544         .release = va1j5jf8007s_release,
 545 };
 546
 547 static int va1j5jf8007s_prepare_1(struct va1j5jf8007s_state *state)
 548 {
 549         u8 addr;
 550         u8 write_buf[1], read_buf[1];
 551         struct i2c_msg msgs[2];
 552
 553         addr = state->config->demod_address;
 554
 555         write_buf[0] = 0x07;
 556
 557         msgs[0].addr = addr;
 558         msgs[0].flags = 0;
 559         msgs[0].len = sizeof(write_buf);
 560         msgs[0].buf = write_buf;
 561
 562         msgs[1].addr = addr;
 563         msgs[1].flags = I2C_M_RD;
 564         msgs[1].len = sizeof(read_buf);
 565         msgs[1].buf = read_buf;
 566
 567         if (i2c_transfer(state->adap, msgs, 2) != 2)
 568                 return -EREMOTEIO;
 569
 570         if (read_buf[0] != 0x41)
 571                 return -EIO;
 572
 573         return 0;
 574 }
 575
 576 static const u8 va1j5jf8007s_prepare_bufs[][2] = {
 577         {0x04, 0x02}, {0x0d, 0x55}, {0x11, 0x40}, {0x13, 0x80}, {0x17, 0x01},
 578         {0x1c, 0x0a}, {0x1d, 0xaa}, {0x1e, 0x20}, {0x1f, 0x88}, {0x51, 0xb0},
 579         {0x52, 0x89}, {0x53, 0xb3}, {0x5a, 0x2d}, {0x5b, 0xd3}, {0x85, 0x69},
 580         {0x87, 0x04}, {0x8e, 0x02}, {0xa3, 0xf7}, {0xa5, 0xc0},
 581 };
 582
 583 static int va1j5jf8007s_prepare_2(struct va1j5jf8007s_state *state)
 584 {
 585         u8 addr;
 586         u8 buf[2];
 587         struct i2c_msg msg;
 588         int i;
 589
 590         addr = state->config->demod_address;
 591
 592         msg.addr = addr;
 593         msg.flags = 0;
 594         msg.len = 2;
 595         msg.buf = buf;
 596         for (i = 0; i < ARRAY_SIZE(va1j5jf8007s_prepare_bufs); i++) {
 597                 memcpy(buf, va1j5jf8007s_prepare_bufs[i], sizeof(buf));
 598                 if (i2c_transfer(state->adap, &msg, 1) != 1)
 599                         return -EREMOTEIO;
 600         }
 601
 602         return 0;
 603 }
 604
 605 /* must be called after va1j5jf8007t_attach */
 606 int va1j5jf8007s_prepare(struct dvb_frontend *fe)
 607 {
 608         struct va1j5jf8007s_state *state;
 609         int ret;
 610
 611         state = fe->demodulator_priv;
 612
 613         ret = va1j5jf8007s_prepare_1(state);
 614         if (ret < 0)
 615                 return ret;
 616
 617         ret = va1j5jf8007s_prepare_2(state);
 618         if (ret < 0)
 619                 return ret;
 620
 621         return va1j5jf8007s_init_frequency(state);
 622 }
 623
 624 struct dvb_frontend *
 625 va1j5jf8007s_attach(const struct va1j5jf8007s_config *config,
 626                     struct i2c_adapter *adap)
 627 {
 628         struct va1j5jf8007s_state *state;
 629         struct dvb_frontend *fe;
 630         u8 buf[2];
 631         struct i2c_msg msg;
 632
 633         state = kzalloc(sizeof(struct va1j5jf8007s_state), GFP_KERNEL);
 634         if (!state)
 635                 return NULL;
 636
 637         state->config = config;
 638         state->adap = adap;
 639
 640         fe = &state->fe;
 641         memcpy(&fe->ops, &va1j5jf8007s_ops, sizeof(struct dvb_frontend_ops));
 642         fe->demodulator_priv = state;
 643
 644         buf[0] = 0x01;
 645         buf[1] = 0x80;
 646
 647         msg.addr = state->config->demod_address;
 648         msg.flags = 0;
 649         msg.len = sizeof(buf);
 650         msg.buf = buf;
 651
 652         if (i2c_transfer(state->adap, &msg, 1) != 1) {
 653                 kfree(state);
 654                 return NULL;
 655         }
 656
 657         return fe;
 658 }