kernel/drivers/media/dvb-frontends/rtl2830.c

   1 /*
   2  * Realtek RTL2830 DVB-T demodulator driver
   3  *
   4  * Copyright (C) 2011 Antti Palosaari <crope@iki.fi>
   5  *
   6  *    This program is free software; you can redistribute it and/or modify
   7  *    it under the terms of the GNU General Public License as published by
   8  *    the Free Software Foundation; either version 2 of the License, or
   9  *    (at your option) any later version.
  10  *
  11  *    This program is distributed in the hope that it will be useful,
  12  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *    GNU General Public License for more details.
  15  *
  16  */
  17
  18 #include "rtl2830_priv.h"
  19
  20 /* Our regmap is bypassing I2C adapter lock, thus we do it! */
  21 static int rtl2830_bulk_write(struct i2c_client *client, unsigned int reg,
  22                               const void *val, size_t val_count)
  23 {
  24         struct rtl2830_dev *dev = i2c_get_clientdata(client);
  25         int ret;
  26
  27         i2c_lock_adapter(client->adapter);
  28         ret = regmap_bulk_write(dev->regmap, reg, val, val_count);
  29         i2c_unlock_adapter(client->adapter);
  30         return ret;
  31 }
  32
  33 static int rtl2830_update_bits(struct i2c_client *client, unsigned int reg,
  34                                unsigned int mask, unsigned int val)
  35 {
  36         struct rtl2830_dev *dev = i2c_get_clientdata(client);
  37         int ret;
  38
  39         i2c_lock_adapter(client->adapter);
  40         ret = regmap_update_bits(dev->regmap, reg, mask, val);
  41         i2c_unlock_adapter(client->adapter);
  42         return ret;
  43 }
  44
  45 static int rtl2830_bulk_read(struct i2c_client *client, unsigned int reg,
  46                              void *val, size_t val_count)
  47 {
  48         struct rtl2830_dev *dev = i2c_get_clientdata(client);
  49         int ret;
  50
  51         i2c_lock_adapter(client->adapter);
  52         ret = regmap_bulk_read(dev->regmap, reg, val, val_count);
  53         i2c_unlock_adapter(client->adapter);
  54         return ret;
  55 }
  56
  57 static int rtl2830_init(struct dvb_frontend *fe)
  58 {
  59         struct i2c_client *client = fe->demodulator_priv;
  60         struct rtl2830_dev *dev = i2c_get_clientdata(client);
  61         struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache;
  62         int ret, i;
  63         struct rtl2830_reg_val_mask tab[] = {
  64                 {0x00d, 0x01, 0x03},
  65                 {0x00d, 0x10, 0x10},
  66                 {0x104, 0x00, 0x1e},
  67                 {0x105, 0x80, 0x80},
  68                 {0x110, 0x02, 0x03},
  69                 {0x110, 0x08, 0x0c},
  70                 {0x17b, 0x00, 0x40},
  71                 {0x17d, 0x05, 0x0f},
  72                 {0x17d, 0x50, 0xf0},
  73                 {0x18c, 0x08, 0x0f},
  74                 {0x18d, 0x00, 0xc0},
  75                 {0x188, 0x05, 0x0f},
  76                 {0x189, 0x00, 0xfc},
  77                 {0x2d5, 0x02, 0x02},
  78                 {0x2f1, 0x02, 0x06},
  79                 {0x2f1, 0x20, 0xf8},
  80                 {0x16d, 0x00, 0x01},
  81                 {0x1a6, 0x00, 0x80},
  82                 {0x106, dev->pdata->vtop, 0x3f},
  83                 {0x107, dev->pdata->krf, 0x3f},
  84                 {0x112, 0x28, 0xff},
  85                 {0x103, dev->pdata->agc_targ_val, 0xff},
  86                 {0x00a, 0x02, 0x07},
  87                 {0x140, 0x0c, 0x3c},
  88                 {0x140, 0x40, 0xc0},
  89                 {0x15b, 0x05, 0x07},
  90                 {0x15b, 0x28, 0x38},
  91                 {0x15c, 0x05, 0x07},
  92                 {0x15c, 0x28, 0x38},
  93                 {0x115, dev->pdata->spec_inv, 0x01},
  94                 {0x16f, 0x01, 0x07},
  95                 {0x170, 0x18, 0x38},
  96                 {0x172, 0x0f, 0x0f},
  97                 {0x173, 0x08, 0x38},
  98                 {0x175, 0x01, 0x07},
  99                 {0x176, 0x00, 0xc0},
 100         };
 101
 102         for (i = 0; i < ARRAY_SIZE(tab); i++) {
 103                 ret = rtl2830_update_bits(client, tab[i].reg, tab[i].mask,
 104                                           tab[i].val);
 105                 if (ret)
 106                         goto err;
 107         }
 108
 109         ret = rtl2830_bulk_write(client, 0x18f, "\x28\x00", 2);
 110         if (ret)
 111                 goto err;
 112
 113         ret = rtl2830_bulk_write(client, 0x195,
 114                                  "\x04\x06\x0a\x12\x0a\x12\x1e\x28", 8);
 115         if (ret)
 116                 goto err;
 117
 118         /* TODO: spec init */
 119
 120         /* soft reset */
 121         ret = rtl2830_update_bits(client, 0x101, 0x04, 0x04);
 122         if (ret)
 123                 goto err;
 124
 125         ret = rtl2830_update_bits(client, 0x101, 0x04, 0x00);
 126         if (ret)
 127                 goto err;
 128
 129         /* init stats here in order signal app which stats are supported */
 130         c->strength.len = 1;
 131         c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 132         c->cnr.len = 1;
 133         c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 134         c->post_bit_error.len = 1;
 135         c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 136         c->post_bit_count.len = 1;
 137         c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 138         /* start statistics polling */
 139         schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000));
 140
 141         dev->sleeping = false;
 142
 143         return ret;
 144 err:
 145         dev_dbg(&client->dev, "failed=%d\n", ret);
 146         return ret;
 147 }
 148
 149 static int rtl2830_sleep(struct dvb_frontend *fe)
 150 {
 151         struct i2c_client *client = fe->demodulator_priv;
 152         struct rtl2830_dev *dev = i2c_get_clientdata(client);
 153
 154         dev->sleeping = true;
 155         /* stop statistics polling */
 156         cancel_delayed_work_sync(&dev->stat_work);
 157         dev->fe_status = 0;
 158
 159         return 0;
 160 }
 161
 162 static int rtl2830_get_tune_settings(struct dvb_frontend *fe,
 163                                      struct dvb_frontend_tune_settings *s)
 164 {
 165         s->min_delay_ms = 500;
 166         s->step_size = fe->ops.info.frequency_stepsize * 2;
 167         s->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
 168
 169         return 0;
 170 }
 171
 172 static int rtl2830_set_frontend(struct dvb_frontend *fe)
 173 {
 174         struct i2c_client *client = fe->demodulator_priv;
 175         struct rtl2830_dev *dev = i2c_get_clientdata(client);
 176         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 177         int ret, i;
 178         u64 num;
 179         u8 buf[3], u8tmp;
 180         u32 if_ctl, if_frequency;
 181         static const u8 bw_params1[3][34] = {
 182                 {
 183                 0x1f, 0xf0, 0x1f, 0xf0, 0x1f, 0xfa, 0x00, 0x17, 0x00, 0x41,
 184                 0x00, 0x64, 0x00, 0x67, 0x00, 0x38, 0x1f, 0xde, 0x1f, 0x7a,
 185                 0x1f, 0x47, 0x1f, 0x7c, 0x00, 0x30, 0x01, 0x4b, 0x02, 0x82,
 186                 0x03, 0x73, 0x03, 0xcf, /* 6 MHz */
 187                 }, {
 188                 0x1f, 0xfa, 0x1f, 0xda, 0x1f, 0xc1, 0x1f, 0xb3, 0x1f, 0xca,
 189                 0x00, 0x07, 0x00, 0x4d, 0x00, 0x6d, 0x00, 0x40, 0x1f, 0xca,
 190                 0x1f, 0x4d, 0x1f, 0x2a, 0x1f, 0xb2, 0x00, 0xec, 0x02, 0x7e,
 191                 0x03, 0xd0, 0x04, 0x53, /* 7 MHz */
 192                 }, {
 193                 0x00, 0x10, 0x00, 0x0e, 0x1f, 0xf7, 0x1f, 0xc9, 0x1f, 0xa0,
 194                 0x1f, 0xa6, 0x1f, 0xec, 0x00, 0x4e, 0x00, 0x7d, 0x00, 0x3a,
 195                 0x1f, 0x98, 0x1f, 0x10, 0x1f, 0x40, 0x00, 0x75, 0x02, 0x5f,
 196                 0x04, 0x24, 0x04, 0xdb, /* 8 MHz */
 197                 },
 198         };
 199         static const u8 bw_params2[3][6] = {
 200                 {0xc3, 0x0c, 0x44, 0x33, 0x33, 0x30}, /* 6 MHz */
 201                 {0xb8, 0xe3, 0x93, 0x99, 0x99, 0x98}, /* 7 MHz */
 202                 {0xae, 0xba, 0xf3, 0x26, 0x66, 0x64}, /* 8 MHz */
 203         };
 204
 205         dev_dbg(&client->dev, "frequency=%u bandwidth_hz=%u inversion=%u\n",
 206                 c->frequency, c->bandwidth_hz, c->inversion);
 207
 208         /* program tuner */
 209         if (fe->ops.tuner_ops.set_params)
 210                 fe->ops.tuner_ops.set_params(fe);
 211
 212         switch (c->bandwidth_hz) {
 213         case 6000000:
 214                 i = 0;
 215                 break;
 216         case 7000000:
 217                 i = 1;
 218                 break;
 219         case 8000000:
 220                 i = 2;
 221                 break;
 222         default:
 223                 dev_err(&client->dev, "invalid bandwidth_hz %u\n",
 224                         c->bandwidth_hz);
 225                 return -EINVAL;
 226         }
 227
 228         ret = rtl2830_update_bits(client, 0x008, 0x06, i << 1);
 229         if (ret)
 230                 goto err;
 231
 232         /* program if frequency */
 233         if (fe->ops.tuner_ops.get_if_frequency)
 234                 ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency);
 235         else
 236                 ret = -EINVAL;
 237         if (ret)
 238                 goto err;
 239
 240         num = if_frequency % dev->pdata->clk;
 241         num *= 0x400000;
 242         num = div_u64(num, dev->pdata->clk);
 243         num = -num;
 244         if_ctl = num & 0x3fffff;
 245         dev_dbg(&client->dev, "if_frequency=%d if_ctl=%08x\n",
 246                 if_frequency, if_ctl);
 247
 248         buf[0] = (if_ctl >> 16) & 0x3f;
 249         buf[1] = (if_ctl >>  8) & 0xff;
 250         buf[2] = (if_ctl >>  0) & 0xff;
 251
 252         ret = rtl2830_bulk_read(client, 0x119, &u8tmp, 1);
 253         if (ret)
 254                 goto err;
 255
 256         buf[0] |= u8tmp & 0xc0;  /* [7:6] */
 257
 258         ret = rtl2830_bulk_write(client, 0x119, buf, 3);
 259         if (ret)
 260                 goto err;
 261
 262         /* 1/2 split I2C write */
 263         ret = rtl2830_bulk_write(client, 0x11c, &bw_params1[i][0], 17);
 264         if (ret)
 265                 goto err;
 266
 267         /* 2/2 split I2C write */
 268         ret = rtl2830_bulk_write(client, 0x12d, &bw_params1[i][17], 17);
 269         if (ret)
 270                 goto err;
 271
 272         ret = rtl2830_bulk_write(client, 0x19d, bw_params2[i], 6);
 273         if (ret)
 274                 goto err;
 275
 276         return ret;
 277 err:
 278         dev_dbg(&client->dev, "failed=%d\n", ret);
 279         return ret;
 280 }
 281
 282 static int rtl2830_get_frontend(struct dvb_frontend *fe)
 283 {
 284         struct i2c_client *client = fe->demodulator_priv;
 285         struct rtl2830_dev *dev = i2c_get_clientdata(client);
 286         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 287         int ret;
 288         u8 buf[3];
 289
 290         if (dev->sleeping)
 291                 return 0;
 292
 293         ret = rtl2830_bulk_read(client, 0x33c, buf, 2);
 294         if (ret)
 295                 goto err;
 296
 297         ret = rtl2830_bulk_read(client, 0x351, &buf[2], 1);
 298         if (ret)
 299                 goto err;
 300
 301         dev_dbg(&client->dev, "TPS=%*ph\n", 3, buf);
 302
 303         switch ((buf[0] >> 2) & 3) {
 304         case 0:
 305                 c->modulation = QPSK;
 306                 break;
 307         case 1:
 308                 c->modulation = QAM_16;
 309                 break;
 310         case 2:
 311                 c->modulation = QAM_64;
 312                 break;
 313         }
 314
 315         switch ((buf[2] >> 2) & 1) {
 316         case 0:
 317                 c->transmission_mode = TRANSMISSION_MODE_2K;
 318                 break;
 319         case 1:
 320                 c->transmission_mode = TRANSMISSION_MODE_8K;
 321         }
 322
 323         switch ((buf[2] >> 0) & 3) {
 324         case 0:
 325                 c->guard_interval = GUARD_INTERVAL_1_32;
 326                 break;
 327         case 1:
 328                 c->guard_interval = GUARD_INTERVAL_1_16;
 329                 break;
 330         case 2:
 331                 c->guard_interval = GUARD_INTERVAL_1_8;
 332                 break;
 333         case 3:
 334                 c->guard_interval = GUARD_INTERVAL_1_4;
 335                 break;
 336         }
 337
 338         switch ((buf[0] >> 4) & 7) {
 339         case 0:
 340                 c->hierarchy = HIERARCHY_NONE;
 341                 break;
 342         case 1:
 343                 c->hierarchy = HIERARCHY_1;
 344                 break;
 345         case 2:
 346                 c->hierarchy = HIERARCHY_2;
 347                 break;
 348         case 3:
 349                 c->hierarchy = HIERARCHY_4;
 350                 break;
 351         }
 352
 353         switch ((buf[1] >> 3) & 7) {
 354         case 0:
 355                 c->code_rate_HP = FEC_1_2;
 356                 break;
 357         case 1:
 358                 c->code_rate_HP = FEC_2_3;
 359                 break;
 360         case 2:
 361                 c->code_rate_HP = FEC_3_4;
 362                 break;
 363         case 3:
 364                 c->code_rate_HP = FEC_5_6;
 365                 break;
 366         case 4:
 367                 c->code_rate_HP = FEC_7_8;
 368                 break;
 369         }
 370
 371         switch ((buf[1] >> 0) & 7) {
 372         case 0:
 373                 c->code_rate_LP = FEC_1_2;
 374                 break;
 375         case 1:
 376                 c->code_rate_LP = FEC_2_3;
 377                 break;
 378         case 2:
 379                 c->code_rate_LP = FEC_3_4;
 380                 break;
 381         case 3:
 382                 c->code_rate_LP = FEC_5_6;
 383                 break;
 384         case 4:
 385                 c->code_rate_LP = FEC_7_8;
 386                 break;
 387         }
 388
 389         return 0;
 390 err:
 391         dev_dbg(&client->dev, "failed=%d\n", ret);
 392         return ret;
 393 }
 394
 395 static int rtl2830_read_status(struct dvb_frontend *fe, fe_status_t *status)
 396 {
 397         struct i2c_client *client = fe->demodulator_priv;
 398         struct rtl2830_dev *dev = i2c_get_clientdata(client);
 399         int ret;
 400         u8 u8tmp;
 401
 402         *status = 0;
 403
 404         if (dev->sleeping)
 405                 return 0;
 406
 407         ret = rtl2830_bulk_read(client, 0x351, &u8tmp, 1);
 408         if (ret)
 409                 goto err;
 410
 411         u8tmp = (u8tmp >> 3) & 0x0f; /* [6:3] */
 412         if (u8tmp == 11) {
 413                 *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
 414                         FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
 415         } else if (u8tmp == 10) {
 416                 *status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
 417                         FE_HAS_VITERBI;
 418         }
 419
 420         dev->fe_status = *status;
 421
 422         return ret;
 423 err:
 424         dev_dbg(&client->dev, "failed=%d\n", ret);
 425         return ret;
 426 }
 427
 428 static int rtl2830_read_snr(struct dvb_frontend *fe, u16 *snr)
 429 {
 430         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 431
 432         if (c->cnr.stat[0].scale == FE_SCALE_DECIBEL)
 433                 *snr = div_s64(c->cnr.stat[0].svalue, 100);
 434         else
 435                 *snr = 0;
 436
 437         return 0;
 438 }
 439
 440 static int rtl2830_read_ber(struct dvb_frontend *fe, u32 *ber)
 441 {
 442         struct i2c_client *client = fe->demodulator_priv;
 443         struct rtl2830_dev *dev = i2c_get_clientdata(client);
 444
 445         *ber = (dev->post_bit_error - dev->post_bit_error_prev);
 446         dev->post_bit_error_prev = dev->post_bit_error;
 447
 448         return 0;
 449 }
 450
 451 static int rtl2830_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
 452 {
 453         *ucblocks = 0;
 454
 455         return 0;
 456 }
 457
 458 static int rtl2830_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
 459 {
 460         struct dtv_frontend_properties *c = &fe->dtv_property_cache;
 461
 462         if (c->strength.stat[0].scale == FE_SCALE_RELATIVE)
 463                 *strength = c->strength.stat[0].uvalue;
 464         else
 465                 *strength = 0;
 466
 467         return 0;
 468 }
 469
 470 static struct dvb_frontend_ops rtl2830_ops = {
 471         .delsys = {SYS_DVBT},
 472         .info = {
 473                 .name = "Realtek RTL2830 (DVB-T)",
 474                 .caps = FE_CAN_FEC_1_2 |
 475                         FE_CAN_FEC_2_3 |
 476                         FE_CAN_FEC_3_4 |
 477                         FE_CAN_FEC_5_6 |
 478                         FE_CAN_FEC_7_8 |
 479                         FE_CAN_FEC_AUTO |
 480                         FE_CAN_QPSK |
 481                         FE_CAN_QAM_16 |
 482                         FE_CAN_QAM_64 |
 483                         FE_CAN_QAM_AUTO |
 484                         FE_CAN_TRANSMISSION_MODE_AUTO |
 485                         FE_CAN_GUARD_INTERVAL_AUTO |
 486                         FE_CAN_HIERARCHY_AUTO |
 487                         FE_CAN_RECOVER |
 488                         FE_CAN_MUTE_TS
 489         },
 490
 491         .init = rtl2830_init,
 492         .sleep = rtl2830_sleep,
 493
 494         .get_tune_settings = rtl2830_get_tune_settings,
 495
 496         .set_frontend = rtl2830_set_frontend,
 497         .get_frontend = rtl2830_get_frontend,
 498
 499         .read_status = rtl2830_read_status,
 500         .read_snr = rtl2830_read_snr,
 501         .read_ber = rtl2830_read_ber,
 502         .read_ucblocks = rtl2830_read_ucblocks,
 503         .read_signal_strength = rtl2830_read_signal_strength,
 504 };
 505
 506 static void rtl2830_stat_work(struct work_struct *work)
 507 {
 508         struct rtl2830_dev *dev = container_of(work, struct rtl2830_dev, stat_work.work);
 509         struct i2c_client *client = dev->client;
 510         struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache;
 511         int ret, tmp;
 512         u8 u8tmp, buf[2];
 513         u16 u16tmp;
 514
 515         dev_dbg(&client->dev, "\n");
 516
 517         /* signal strength */
 518         if (dev->fe_status & FE_HAS_SIGNAL) {
 519                 struct {signed int x:14; } s;
 520
 521                 /* read IF AGC */
 522                 ret = rtl2830_bulk_read(client, 0x359, buf, 2);
 523                 if (ret)
 524                         goto err;
 525
 526                 u16tmp = buf[0] << 8 | buf[1] << 0;
 527                 u16tmp &= 0x3fff; /* [13:0] */
 528                 tmp = s.x = u16tmp; /* 14-bit bin to 2 complement */
 529                 u16tmp = clamp_val(-4 * tmp + 32767, 0x0000, 0xffff);
 530
 531                 dev_dbg(&client->dev, "IF AGC=%d\n", tmp);
 532
 533                 c->strength.stat[0].scale = FE_SCALE_RELATIVE;
 534                 c->strength.stat[0].uvalue = u16tmp;
 535         } else {
 536                 c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 537         }
 538
 539         /* CNR */
 540         if (dev->fe_status & FE_HAS_VITERBI) {
 541                 unsigned hierarchy, constellation;
 542                 #define CONSTELLATION_NUM 3
 543                 #define HIERARCHY_NUM 4
 544                 static const u32 constant[CONSTELLATION_NUM][HIERARCHY_NUM] = {
 545                         {70705899, 70705899, 70705899, 70705899},
 546                         {82433173, 82433173, 87483115, 94445660},
 547                         {92888734, 92888734, 95487525, 99770748},
 548                 };
 549
 550                 ret = rtl2830_bulk_read(client, 0x33c, &u8tmp, 1);
 551                 if (ret)
 552                         goto err;
 553
 554                 constellation = (u8tmp >> 2) & 0x03; /* [3:2] */
 555                 if (constellation > CONSTELLATION_NUM - 1)
 556                         goto err_schedule_delayed_work;
 557
 558                 hierarchy = (u8tmp >> 4) & 0x07; /* [6:4] */
 559                 if (hierarchy > HIERARCHY_NUM - 1)
 560                         goto err_schedule_delayed_work;
 561
 562                 ret = rtl2830_bulk_read(client, 0x40c, buf, 2);
 563                 if (ret)
 564                         goto err;
 565
 566                 u16tmp = buf[0] << 8 | buf[1] << 0;
 567                 if (u16tmp)
 568                         tmp = (constant[constellation][hierarchy] -
 569                                intlog10(u16tmp)) / ((1 << 24) / 10000);
 570                 else
 571                         tmp = 0;
 572
 573                 dev_dbg(&client->dev, "CNR raw=%u\n", u16tmp);
 574
 575                 c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
 576                 c->cnr.stat[0].svalue = tmp;
 577         } else {
 578                 c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 579         }
 580
 581         /* BER */
 582         if (dev->fe_status & FE_HAS_LOCK) {
 583                 ret = rtl2830_bulk_read(client, 0x34e, buf, 2);
 584                 if (ret)
 585                         goto err;
 586
 587                 u16tmp = buf[0] << 8 | buf[1] << 0;
 588                 dev->post_bit_error += u16tmp;
 589                 dev->post_bit_count += 1000000;
 590
 591                 dev_dbg(&client->dev, "BER errors=%u total=1000000\n", u16tmp);
 592
 593                 c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
 594                 c->post_bit_error.stat[0].uvalue = dev->post_bit_error;
 595                 c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
 596                 c->post_bit_count.stat[0].uvalue = dev->post_bit_count;
 597         } else {
 598                 c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 599                 c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
 600         }
 601
 602 err_schedule_delayed_work:
 603         schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000));
 604         return;
 605 err:
 606         dev_dbg(&client->dev, "failed=%d\n", ret);
 607 }
 608
 609 static int rtl2830_pid_filter_ctrl(struct dvb_frontend *fe, int onoff)
 610 {
 611         struct i2c_client *client = fe->demodulator_priv;
 612         int ret;
 613         u8 u8tmp;
 614
 615         dev_dbg(&client->dev, "onoff=%d\n", onoff);
 616
 617         /* enable / disable PID filter */
 618         if (onoff)
 619                 u8tmp = 0x80;
 620         else
 621                 u8tmp = 0x00;
 622
 623         ret = rtl2830_update_bits(client, 0x061, 0x80, u8tmp);
 624         if (ret)
 625                 goto err;
 626
 627         return 0;
 628 err:
 629         dev_dbg(&client->dev, "failed=%d\n", ret);
 630         return ret;
 631 }
 632
 633 static int rtl2830_pid_filter(struct dvb_frontend *fe, u8 index, u16 pid, int onoff)
 634 {
 635         struct i2c_client *client = fe->demodulator_priv;
 636         struct rtl2830_dev *dev = i2c_get_clientdata(client);
 637         int ret;
 638         u8 buf[4];
 639
 640         dev_dbg(&client->dev, "index=%d pid=%04x onoff=%d\n",
 641                 index, pid, onoff);
 642
 643         /* skip invalid PIDs (0x2000) */
 644         if (pid > 0x1fff || index > 32)
 645                 return 0;
 646
 647         if (onoff)
 648                 set_bit(index, &dev->filters);
 649         else
 650                 clear_bit(index, &dev->filters);
 651
 652         /* enable / disable PIDs */
 653         buf[0] = (dev->filters >>  0) & 0xff;
 654         buf[1] = (dev->filters >>  8) & 0xff;
 655         buf[2] = (dev->filters >> 16) & 0xff;
 656         buf[3] = (dev->filters >> 24) & 0xff;
 657         ret = rtl2830_bulk_write(client, 0x062, buf, 4);
 658         if (ret)
 659                 goto err;
 660
 661         /* add PID */
 662         buf[0] = (pid >> 8) & 0xff;
 663         buf[1] = (pid >> 0) & 0xff;
 664         ret = rtl2830_bulk_write(client, 0x066 + 2 * index, buf, 2);
 665         if (ret)
 666                 goto err;
 667
 668         return 0;
 669 err:
 670         dev_dbg(&client->dev, "failed=%d\n", ret);
 671         return ret;
 672 }
 673
 674 /*
 675  * I2C gate/mux/repeater logic
 676  * We must use unlocked __i2c_transfer() here (through regmap) because of I2C
 677  * adapter lock is already taken by tuner driver.
 678  * Gate is closed automatically after single I2C transfer.
 679  */
 680 static int rtl2830_select(struct i2c_adapter *adap, void *mux_priv, u32 chan_id)
 681 {
 682         struct i2c_client *client = mux_priv;
 683         struct rtl2830_dev *dev = i2c_get_clientdata(client);
 684         int ret;
 685
 686         dev_dbg(&client->dev, "\n");
 687
 688         /* open I2C repeater for 1 transfer, closes automatically */
 689         /* XXX: regmap_update_bits() does not lock I2C adapter */
 690         ret = regmap_update_bits(dev->regmap, 0x101, 0x08, 0x08);
 691         if (ret)
 692                 goto err;
 693
 694         return 0;
 695 err:
 696         dev_dbg(&client->dev, "failed=%d\n", ret);
 697         return ret;
 698 }
 699
 700 static struct dvb_frontend *rtl2830_get_dvb_frontend(struct i2c_client *client)
 701 {
 702         struct rtl2830_dev *dev = i2c_get_clientdata(client);
 703
 704         dev_dbg(&client->dev, "\n");
 705
 706         return &dev->fe;
 707 }
 708
 709 static struct i2c_adapter *rtl2830_get_i2c_adapter(struct i2c_client *client)
 710 {
 711         struct rtl2830_dev *dev = i2c_get_clientdata(client);
 712
 713         dev_dbg(&client->dev, "\n");
 714
 715         return dev->adapter;
 716 }
 717
 718 /*
 719  * We implement own I2C access routines for regmap in order to get manual access
 720  * to I2C adapter lock, which is needed for I2C mux adapter.
 721  */
 722 static int rtl2830_regmap_read(void *context, const void *reg_buf,
 723                                size_t reg_size, void *val_buf, size_t val_size)
 724 {
 725         struct i2c_client *client = context;
 726         int ret;
 727         struct i2c_msg msg[2] = {
 728                 {
 729                         .addr = client->addr,
 730                         .flags = 0,
 731                         .len = reg_size,
 732                         .buf = (u8 *)reg_buf,
 733                 }, {
 734                         .addr = client->addr,
 735                         .flags = I2C_M_RD,
 736                         .len = val_size,
 737                         .buf = val_buf,
 738                 }
 739         };
 740
 741         ret = __i2c_transfer(client->adapter, msg, 2);
 742         if (ret != 2) {
 743                 dev_warn(&client->dev, "i2c reg read failed %d\n", ret);
 744                 if (ret >= 0)
 745                         ret = -EREMOTEIO;
 746                 return ret;
 747         }
 748         return 0;
 749 }
 750
 751 static int rtl2830_regmap_write(void *context, const void *data, size_t count)
 752 {
 753         struct i2c_client *client = context;
 754         int ret;
 755         struct i2c_msg msg[1] = {
 756                 {
 757                         .addr = client->addr,
 758                         .flags = 0,
 759                         .len = count,
 760                         .buf = (u8 *)data,
 761                 }
 762         };
 763
 764         ret = __i2c_transfer(client->adapter, msg, 1);
 765         if (ret != 1) {
 766                 dev_warn(&client->dev, "i2c reg write failed %d\n", ret);
 767                 if (ret >= 0)
 768                         ret = -EREMOTEIO;
 769                 return ret;
 770         }
 771         return 0;
 772 }
 773
 774 static int rtl2830_regmap_gather_write(void *context, const void *reg,
 775                                        size_t reg_len, const void *val,
 776                                        size_t val_len)
 777 {
 778         struct i2c_client *client = context;
 779         int ret;
 780         u8 buf[256];
 781         struct i2c_msg msg[1] = {
 782                 {
 783                         .addr = client->addr,
 784                         .flags = 0,
 785                         .len = 1 + val_len,
 786                         .buf = buf,
 787                 }
 788         };
 789
 790         buf[0] = *(u8 const *)reg;
 791         memcpy(&buf[1], val, val_len);
 792
 793         ret = __i2c_transfer(client->adapter, msg, 1);
 794         if (ret != 1) {
 795                 dev_warn(&client->dev, "i2c reg write failed %d\n", ret);
 796                 if (ret >= 0)
 797                         ret = -EREMOTEIO;
 798                 return ret;
 799         }
 800         return 0;
 801 }
 802
 803 static int rtl2830_probe(struct i2c_client *client,
 804                          const struct i2c_device_id *id)
 805 {
 806         struct rtl2830_platform_data *pdata = client->dev.platform_data;
 807         struct rtl2830_dev *dev;
 808         int ret;
 809         u8 u8tmp;
 810         static const struct regmap_bus regmap_bus = {
 811                 .read = rtl2830_regmap_read,
 812                 .write = rtl2830_regmap_write,
 813                 .gather_write = rtl2830_regmap_gather_write,
 814                 .val_format_endian_default = REGMAP_ENDIAN_NATIVE,
 815         };
 816         static const struct regmap_range_cfg regmap_range_cfg[] = {
 817                 {
 818                         .selector_reg     = 0x00,
 819                         .selector_mask    = 0xff,
 820                         .selector_shift   = 0,
 821                         .window_start     = 0,
 822                         .window_len       = 0x100,
 823                         .range_min        = 0 * 0x100,
 824                         .range_max        = 5 * 0x100,
 825                 },
 826         };
 827         static const struct regmap_config regmap_config = {
 828                 .reg_bits    =  8,
 829                 .val_bits    =  8,
 830                 .max_register = 5 * 0x100,
 831                 .ranges = regmap_range_cfg,
 832                 .num_ranges = ARRAY_SIZE(regmap_range_cfg),
 833         };
 834
 835         dev_dbg(&client->dev, "\n");
 836
 837         if (pdata == NULL) {
 838                 ret = -EINVAL;
 839                 goto err;
 840         }
 841
 842         /* allocate memory for the internal state */
 843         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 844         if (dev == NULL) {
 845                 ret = -ENOMEM;
 846                 goto err;
 847         }
 848
 849         /* setup the state */
 850         i2c_set_clientdata(client, dev);
 851         dev->client = client;
 852         dev->pdata = client->dev.platform_data;
 853         dev->sleeping = true;
 854         INIT_DELAYED_WORK(&dev->stat_work, rtl2830_stat_work);
 855         dev->regmap = regmap_init(&client->dev, &regmap_bus, client,
 856                                   &regmap_config);
 857         if (IS_ERR(dev->regmap)) {
 858                 ret = PTR_ERR(dev->regmap);
 859                 goto err_kfree;
 860         }
 861
 862         /* check if the demod is there */
 863         ret = rtl2830_bulk_read(client, 0x000, &u8tmp, 1);
 864         if (ret)
 865                 goto err_regmap_exit;
 866
 867         /* create muxed i2c adapter for tuner */
 868         dev->adapter = i2c_add_mux_adapter(client->adapter, &client->dev,
 869                         client, 0, 0, 0, rtl2830_select, NULL);
 870         if (dev->adapter == NULL) {
 871                 ret = -ENODEV;
 872                 goto err_regmap_exit;
 873         }
 874
 875         /* create dvb frontend */
 876         memcpy(&dev->fe.ops, &rtl2830_ops, sizeof(dev->fe.ops));
 877         dev->fe.demodulator_priv = client;
 878
 879         /* setup callbacks */
 880         pdata->get_dvb_frontend = rtl2830_get_dvb_frontend;
 881         pdata->get_i2c_adapter = rtl2830_get_i2c_adapter;
 882         pdata->pid_filter = rtl2830_pid_filter;
 883         pdata->pid_filter_ctrl = rtl2830_pid_filter_ctrl;
 884
 885         dev_info(&client->dev, "Realtek RTL2830 successfully attached\n");
 886
 887         return 0;
 888 err_regmap_exit:
 889         regmap_exit(dev->regmap);
 890 err_kfree:
 891         kfree(dev);
 892 err:
 893         dev_dbg(&client->dev, "failed=%d\n", ret);
 894         return ret;
 895 }
 896
 897 static int rtl2830_remove(struct i2c_client *client)
 898 {
 899         struct rtl2830_dev *dev = i2c_get_clientdata(client);
 900
 901         dev_dbg(&client->dev, "\n");
 902
 903         i2c_del_mux_adapter(dev->adapter);
 904         regmap_exit(dev->regmap);
 905         kfree(dev);
 906
 907         return 0;
 908 }
 909
 910 static const struct i2c_device_id rtl2830_id_table[] = {
 911         {"rtl2830", 0},
 912         {}
 913 };
 914 MODULE_DEVICE_TABLE(i2c, rtl2830_id_table);
 915
 916 static struct i2c_driver rtl2830_driver = {
 917         .driver = {
 918                 .owner  = THIS_MODULE,
 919                 .name   = "rtl2830",
 920         },
 921         .probe          = rtl2830_probe,
 922         .remove         = rtl2830_remove,
 923         .id_table       = rtl2830_id_table,
 924 };
 925
 926 module_i2c_driver(rtl2830_driver);
 927
 928 MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
 929 MODULE_DESCRIPTION("Realtek RTL2830 DVB-T demodulator driver");
 930 MODULE_LICENSE("GPL");