drivers/media/dvb/frontends/tda10048.c

   1 /*
   2     NXP TDA10048HN DVB OFDM demodulator driver
   3
   4     Copyright (C) 2008 Steven Toth <stoth@linuxtv.org>
   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     You should have received a copy of the GNU General Public License
  17     along with this program; if not, write to the Free Software
  18     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19
  20 */
  21
  22 #include <linux/kernel.h>
  23 #include <linux/init.h>
  24 #include <linux/module.h>
  25 #include <linux/string.h>
  26 #include <linux/slab.h>
  27 #include <linux/delay.h>
  28 #include "dvb_frontend.h"
  29 #include "dvb_math.h"
  30 #include "tda10048.h"
  31
  32 #define TDA10048_DEFAULT_FIRMWARE "dvb-fe-tda10048-1.0.fw"
  33 #define TDA10048_DEFAULT_FIRMWARE_SIZE 24878
  34
  35 /* Register name definitions */
  36 #define TDA10048_IDENTITY          0x00
  37 #define TDA10048_VERSION           0x01
  38 #define TDA10048_DSP_CODE_CPT      0x0C
  39 #define TDA10048_DSP_CODE_IN       0x0E
  40 #define TDA10048_IN_CONF1          0x10
  41 #define TDA10048_IN_CONF2          0x11
  42 #define TDA10048_IN_CONF3          0x12
  43 #define TDA10048_OUT_CONF1         0x14
  44 #define TDA10048_OUT_CONF2         0x15
  45 #define TDA10048_OUT_CONF3         0x16
  46 #define TDA10048_AUTO              0x18
  47 #define TDA10048_SYNC_STATUS       0x1A
  48 #define TDA10048_CONF_C4_1         0x1E
  49 #define TDA10048_CONF_C4_2         0x1F
  50 #define TDA10048_CODE_IN_RAM       0x20
  51 #define TDA10048_CHANNEL_INFO_1_R  0x22
  52 #define TDA10048_CHANNEL_INFO_2_R  0x23
  53 #define TDA10048_CHANNEL_INFO1     0x24
  54 #define TDA10048_CHANNEL_INFO2     0x25
  55 #define TDA10048_TIME_ERROR_R      0x26
  56 #define TDA10048_TIME_ERROR        0x27
  57 #define TDA10048_FREQ_ERROR_LSB_R  0x28
  58 #define TDA10048_FREQ_ERROR_MSB_R  0x29
  59 #define TDA10048_FREQ_ERROR_LSB    0x2A
  60 #define TDA10048_FREQ_ERROR_MSB    0x2B
  61 #define TDA10048_IT_SEL            0x30
  62 #define TDA10048_IT_STAT           0x32
  63 #define TDA10048_DSP_AD_LSB        0x3C
  64 #define TDA10048_DSP_AD_MSB        0x3D
  65 #define TDA10048_DSP_REF_LSB       0x3E
  66 #define TDA10048_DSP_REF_MSB       0x3F
  67 #define TDA10048_CONF_TRISTATE1    0x44
  68 #define TDA10048_CONF_TRISTATE2    0x45
  69 #define TDA10048_CONF_POLARITY     0x46
  70 #define TDA10048_GPIO_SP_DS0       0x48
  71 #define TDA10048_GPIO_SP_DS1       0x49
  72 #define TDA10048_GPIO_SP_DS2       0x4A
  73 #define TDA10048_GPIO_SP_DS3       0x4B
  74 #define TDA10048_GPIO_OUT_SEL      0x4C
  75 #define TDA10048_GPIO_SELECT       0x4D
  76 #define TDA10048_IC_MODE           0x4E
  77 #define TDA10048_CONF_XO           0x50
  78 #define TDA10048_CONF_PLL1         0x51
  79 #define TDA10048_CONF_PLL2         0x52
  80 #define TDA10048_CONF_PLL3         0x53
  81 #define TDA10048_CONF_ADC          0x54
  82 #define TDA10048_CONF_ADC_2        0x55
  83 #define TDA10048_CONF_C1_1         0x60
  84 #define TDA10048_CONF_C1_3         0x62
  85 #define TDA10048_AGC_CONF          0x70
  86 #define TDA10048_AGC_THRESHOLD_LSB 0x72
  87 #define TDA10048_AGC_THRESHOLD_MSB 0x73
  88 #define TDA10048_AGC_RENORM        0x74
  89 #define TDA10048_AGC_GAINS         0x76
  90 #define TDA10048_AGC_TUN_MIN       0x78
  91 #define TDA10048_AGC_TUN_MAX       0x79
  92 #define TDA10048_AGC_IF_MIN        0x7A
  93 #define TDA10048_AGC_IF_MAX        0x7B
  94 #define TDA10048_AGC_TUN_LEVEL     0x7E
  95 #define TDA10048_AGC_IF_LEVEL      0x7F
  96 #define TDA10048_DIG_AGC_LEVEL     0x81
  97 #define TDA10048_FREQ_PHY2_LSB     0x86
  98 #define TDA10048_FREQ_PHY2_MSB     0x87
  99 #define TDA10048_TIME_INVWREF_LSB  0x88
 100 #define TDA10048_TIME_INVWREF_MSB  0x89
 101 #define TDA10048_TIME_WREF_LSB     0x8A
 102 #define TDA10048_TIME_WREF_MID1    0x8B
 103 #define TDA10048_TIME_WREF_MID2    0x8C
 104 #define TDA10048_TIME_WREF_MSB     0x8D
 105 #define TDA10048_NP_OUT            0xA2
 106 #define TDA10048_CELL_ID_LSB       0xA4
 107 #define TDA10048_CELL_ID_MSB       0xA5
 108 #define TDA10048_EXTTPS_ODD        0xAA
 109 #define TDA10048_EXTTPS_EVEN       0xAB
 110 #define TDA10048_TPS_LENGTH        0xAC
 111 #define TDA10048_FREE_REG_1        0xB2
 112 #define TDA10048_FREE_REG_2        0xB3
 113 #define TDA10048_CONF_C3_1         0xC0
 114 #define TDA10048_CYBER_CTRL        0xC2
 115 #define TDA10048_CBER_NMAX_LSB     0xC4
 116 #define TDA10048_CBER_NMAX_MSB     0xC5
 117 #define TDA10048_CBER_LSB          0xC6
 118 #define TDA10048_CBER_MSB          0xC7
 119 #define TDA10048_VBER_LSB          0xC8
 120 #define TDA10048_VBER_MID          0xC9
 121 #define TDA10048_VBER_MSB          0xCA
 122 #define TDA10048_CYBER_LUT         0xCC
 123 #define TDA10048_UNCOR_CTRL        0xCD
 124 #define TDA10048_UNCOR_CPT_LSB     0xCE
 125 #define TDA10048_UNCOR_CPT_MSB     0xCF
 126 #define TDA10048_SOFT_IT_C3        0xD6
 127 #define TDA10048_CONF_TS2          0xE0
 128 #define TDA10048_CONF_TS1          0xE1
 129
 130 static unsigned int debug;
 131
 132 #define dprintk(level, fmt, arg...)\
 133         do { if (debug >= level)\
 134                 printk(KERN_DEBUG "tda10048: " fmt, ## arg);\
 135         } while (0)
 136
 137 struct tda10048_state {
 138
 139         struct i2c_adapter *i2c;
 140
 141         /* configuration settings */
 142         const struct tda10048_config *config;
 143         struct dvb_frontend frontend;
 144
 145         int fwloaded;
 146 };
 147
 148 static struct init_tab {
 149         u8      reg;
 150         u16     data;
 151 } init_tab[] = {
 152         { TDA10048_CONF_PLL1, 0x08 },
 153         { TDA10048_CONF_ADC_2, 0x00 },
 154         { TDA10048_CONF_C4_1, 0x00 },
 155         { TDA10048_CONF_PLL1, 0x0f },
 156         { TDA10048_CONF_PLL2, 0x0a },
 157         { TDA10048_CONF_PLL3, 0x43 },
 158         { TDA10048_FREQ_PHY2_LSB, 0x02 },
 159         { TDA10048_FREQ_PHY2_MSB, 0x0a },
 160         { TDA10048_TIME_WREF_LSB, 0xbd },
 161         { TDA10048_TIME_WREF_MID1, 0xe4 },
 162         { TDA10048_TIME_WREF_MID2, 0xa8 },
 163         { TDA10048_TIME_WREF_MSB, 0x02 },
 164         { TDA10048_TIME_INVWREF_LSB, 0x04 },
 165         { TDA10048_TIME_INVWREF_MSB, 0x06 },
 166         { TDA10048_CONF_C4_1, 0x00 },
 167         { TDA10048_CONF_C1_1, 0xa8 },
 168         { TDA10048_AGC_CONF, 0x16 },
 169         { TDA10048_CONF_C1_3, 0x0b },
 170         { TDA10048_AGC_TUN_MIN, 0x00 },
 171         { TDA10048_AGC_TUN_MAX, 0xff },
 172         { TDA10048_AGC_IF_MIN, 0x00 },
 173         { TDA10048_AGC_IF_MAX, 0xff },
 174         { TDA10048_AGC_THRESHOLD_MSB, 0x00 },
 175         { TDA10048_AGC_THRESHOLD_LSB, 0x70 },
 176         { TDA10048_CYBER_CTRL, 0x38 },
 177         { TDA10048_AGC_GAINS, 0x12 },
 178         { TDA10048_CONF_XO, 0x00 },
 179         { TDA10048_CONF_TS1, 0x07 },
 180         { TDA10048_IC_MODE, 0x00 },
 181         { TDA10048_CONF_TS2, 0xc0 },
 182         { TDA10048_CONF_TRISTATE1, 0x21 },
 183         { TDA10048_CONF_TRISTATE2, 0x00 },
 184         { TDA10048_CONF_POLARITY, 0x00 },
 185         { TDA10048_CONF_C4_2, 0x04 },
 186         { TDA10048_CONF_ADC, 0x60 },
 187         { TDA10048_CONF_ADC_2, 0x10 },
 188         { TDA10048_CONF_ADC, 0x60 },
 189         { TDA10048_CONF_ADC_2, 0x00 },
 190         { TDA10048_CONF_C1_1, 0xa8 },
 191         { TDA10048_UNCOR_CTRL, 0x00 },
 192         { TDA10048_CONF_C4_2, 0x04 },
 193 };
 194
 195 static int tda10048_writereg(struct tda10048_state *state, u8 reg, u8 data)
 196 {
 197         int ret;
 198         u8 buf[] = { reg, data };
 199         struct i2c_msg msg = {
 200                 .addr = state->config->demod_address,
 201                 .flags = 0, .buf = buf, .len = 2 };
 202
 203         dprintk(2, "%s(reg = 0x%02x, data = 0x%02x)\n", __func__, reg, data);
 204
 205         ret = i2c_transfer(state->i2c, &msg, 1);
 206
 207         if (ret != 1)
 208                 printk("%s: writereg error (ret == %i)\n", __func__, ret);
 209
 210         return (ret != 1) ? -1 : 0;
 211 }
 212
 213 static u8 tda10048_readreg(struct tda10048_state *state, u8 reg)
 214 {
 215         int ret;
 216         u8 b0[] = { reg };
 217         u8 b1[] = { 0 };
 218         struct i2c_msg msg[] = {
 219                 { .addr = state->config->demod_address,
 220                         .flags = 0, .buf = b0, .len = 1 },
 221                 { .addr = state->config->demod_address,
 222                         .flags = I2C_M_RD, .buf = b1, .len = 1 } };
 223
 224         dprintk(2, "%s(reg = 0x%02x)\n", __func__, reg);
 225
 226         ret = i2c_transfer(state->i2c, msg, 2);
 227
 228         if (ret != 2)
 229                 printk(KERN_ERR "%s: readreg error (ret == %i)\n",
 230                         __func__, ret);
 231
 232         return b1[0];
 233 }
 234
 235 static int tda10048_writeregbulk(struct tda10048_state *state, u8 reg,
 236                                  const u8 *data, u16 len)
 237 {
 238         int ret = -EREMOTEIO;
 239         struct i2c_msg msg;
 240         u8 *buf;
 241
 242         dprintk(2, "%s(%d, ?, len = %d)\n", __func__, reg, len);
 243
 244         buf = kmalloc(len + 1, GFP_KERNEL);
 245         if (buf == NULL) {
 246                 ret = -ENOMEM;
 247                 goto error;
 248         }
 249
 250         *buf = reg;
 251         memcpy(buf + 1, data, len);
 252
 253         msg.addr = state->config->demod_address;
 254         msg.flags = 0;
 255         msg.buf = buf;
 256         msg.len = len + 1;
 257
 258         dprintk(2, "%s():  write len = %d\n",
 259                 __func__, msg.len);
 260
 261         ret = i2c_transfer(state->i2c, &msg, 1);
 262         if (ret != 1) {
 263                 printk(KERN_ERR "%s(): writereg error err %i\n",
 264                          __func__, ret);
 265                 ret = -EREMOTEIO;
 266         }
 267
 268 error:
 269         kfree(buf);
 270
 271         return ret;
 272 }
 273
 274 static int tda10048_firmware_upload(struct dvb_frontend *fe)
 275 {
 276         struct tda10048_state *state = fe->demodulator_priv;
 277         const struct firmware *fw;
 278         int ret;
 279         int pos = 0;
 280         int cnt;
 281         u8 wlen = state->config->fwbulkwritelen;
 282
 283         if ((wlen != TDA10048_BULKWRITE_200) && (wlen != TDA10048_BULKWRITE_50))
 284                 wlen = TDA10048_BULKWRITE_200;
 285
 286         /* request the firmware, this will block and timeout */
 287         printk(KERN_INFO "%s: waiting for firmware upload (%s)...\n",
 288                 __func__,
 289                 TDA10048_DEFAULT_FIRMWARE);
 290
 291         ret = request_firmware(&fw, TDA10048_DEFAULT_FIRMWARE,
 292                 &state->i2c->dev);
 293         if (ret) {
 294                 printk(KERN_ERR "%s: Upload failed. (file not found?)\n",
 295                         __func__);
 296                 return -EIO;
 297         } else {
 298                 printk(KERN_INFO "%s: firmware read %Zu bytes.\n",
 299                         __func__,
 300                         fw->size);
 301                 ret = 0;
 302         }
 303
 304         if (fw->size != TDA10048_DEFAULT_FIRMWARE_SIZE) {
 305                 printk(KERN_ERR "%s: firmware incorrect size\n", __func__);
 306                 ret = -EIO;
 307         } else {
 308                 printk(KERN_INFO "%s: firmware uploading\n", __func__);
 309
 310                 /* Soft reset */
 311                 tda10048_writereg(state, TDA10048_CONF_TRISTATE1,
 312                         tda10048_readreg(state, TDA10048_CONF_TRISTATE1)
 313                                 & 0xfe);
 314                 tda10048_writereg(state, TDA10048_CONF_TRISTATE1,
 315                         tda10048_readreg(state, TDA10048_CONF_TRISTATE1)
 316                                 | 0x01);
 317
 318                 /* Put the demod into host download mode */
 319                 tda10048_writereg(state, TDA10048_CONF_C4_1,
 320                         tda10048_readreg(state, TDA10048_CONF_C4_1) & 0xf9);
 321
 322                 /* Boot the DSP */
 323                 tda10048_writereg(state, TDA10048_CONF_C4_1,
 324                         tda10048_readreg(state, TDA10048_CONF_C4_1) | 0x08);
 325
 326                 /* Prepare for download */
 327                 tda10048_writereg(state, TDA10048_DSP_CODE_CPT, 0);
 328
 329                 /* Download the firmware payload */
 330                 while (pos < fw->size) {
 331
 332                         if ((fw->size - pos) > wlen)
 333                                 cnt = wlen;
 334                         else
 335                                 cnt = fw->size - pos;
 336
 337                         tda10048_writeregbulk(state, TDA10048_DSP_CODE_IN,
 338                                 &fw->data[pos], cnt);
 339
 340                         pos += cnt;
 341                 }
 342
 343                 ret = -EIO;
 344                 /* Wait up to 250ms for the DSP to boot */
 345                 for (cnt = 0; cnt < 250 ; cnt += 10) {
 346
 347                         msleep(10);
 348
 349                         if (tda10048_readreg(state, TDA10048_SYNC_STATUS)
 350                                 & 0x40) {
 351                                 ret = 0;
 352                                 break;
 353                         }
 354                 }
 355         }
 356
 357         release_firmware(fw);
 358
 359         if (ret == 0) {
 360                 printk(KERN_INFO "%s: firmware uploaded\n", __func__);
 361                 state->fwloaded = 1;
 362         } else
 363                 printk(KERN_ERR "%s: firmware upload failed\n", __func__);
 364
 365         return ret;
 366 }
 367
 368 static int tda10048_set_inversion(struct dvb_frontend *fe, int inversion)
 369 {
 370         struct tda10048_state *state = fe->demodulator_priv;
 371
 372         dprintk(1, "%s(%d)\n", __func__, inversion);
 373
 374         if (inversion == TDA10048_INVERSION_ON)
 375                 tda10048_writereg(state, TDA10048_CONF_C1_1,
 376                         tda10048_readreg(state, TDA10048_CONF_C1_1) | 0x20);
 377         else
 378                 tda10048_writereg(state, TDA10048_CONF_C1_1,
 379                         tda10048_readreg(state, TDA10048_CONF_C1_1) & 0xdf);
 380
 381         return 0;
 382 }
 383
 384 /* Retrieve the demod settings */
 385 static int tda10048_get_tps(struct tda10048_state *state,
 386         struct dvb_ofdm_parameters *p)
 387 {
 388         u8 val;
 389
 390         /* Make sure the TPS regs are valid */
 391         if (!(tda10048_readreg(state, TDA10048_AUTO) & 0x01))
 392                 return -EAGAIN;
 393
 394         val = tda10048_readreg(state, TDA10048_OUT_CONF2);
 395         switch ((val & 0x60) >> 5) {
 396         case 0:
 397                 p->constellation = QPSK;
 398                 break;
 399         case 1:
 400                 p->constellation = QAM_16;
 401                 break;
 402         case 2:
 403                 p->constellation = QAM_64;
 404                 break;
 405         }
 406         switch ((val & 0x18) >> 3) {
 407         case 0:
 408                 p->hierarchy_information = HIERARCHY_NONE;
 409                 break;
 410         case 1:
 411                 p->hierarchy_information = HIERARCHY_1;
 412                 break;
 413         case 2:
 414                 p->hierarchy_information = HIERARCHY_2;
 415                 break;
 416         case 3:
 417                 p->hierarchy_information = HIERARCHY_4;
 418                 break;
 419         }
 420         switch (val & 0x07) {
 421         case 0:
 422                 p->code_rate_HP = FEC_1_2;
 423                 break;
 424         case 1:
 425                 p->code_rate_HP = FEC_2_3;
 426                 break;
 427         case 2:
 428                 p->code_rate_HP = FEC_3_4;
 429                 break;
 430         case 3:
 431                 p->code_rate_HP = FEC_5_6;
 432                 break;
 433         case 4:
 434                 p->code_rate_HP = FEC_7_8;
 435                 break;
 436         }
 437
 438         val = tda10048_readreg(state, TDA10048_OUT_CONF3);
 439         switch (val & 0x07) {
 440         case 0:
 441                 p->code_rate_LP = FEC_1_2;
 442                 break;
 443         case 1:
 444                 p->code_rate_LP = FEC_2_3;
 445                 break;
 446         case 2:
 447                 p->code_rate_LP = FEC_3_4;
 448                 break;
 449         case 3:
 450                 p->code_rate_LP = FEC_5_6;
 451                 break;
 452         case 4:
 453                 p->code_rate_LP = FEC_7_8;
 454                 break;
 455         }
 456
 457         val = tda10048_readreg(state, TDA10048_OUT_CONF1);
 458         switch ((val & 0x0c) >> 2) {
 459         case 0:
 460                 p->guard_interval = GUARD_INTERVAL_1_32;
 461                 break;
 462         case 1:
 463                 p->guard_interval = GUARD_INTERVAL_1_16;
 464                 break;
 465         case 2:
 466                 p->guard_interval =  GUARD_INTERVAL_1_8;
 467                 break;
 468         case 3:
 469                 p->guard_interval =  GUARD_INTERVAL_1_4;
 470                 break;
 471         }
 472         switch (val & 0x02) {
 473         case 0:
 474                 p->transmission_mode = TRANSMISSION_MODE_2K;
 475                 break;
 476         case 1:
 477                 p->transmission_mode = TRANSMISSION_MODE_8K;
 478                 break;
 479         }
 480
 481         return 0;
 482 }
 483
 484 static int tda10048_i2c_gate_ctrl(struct dvb_frontend *fe, int enable)
 485 {
 486         struct tda10048_state *state = fe->demodulator_priv;
 487         dprintk(1, "%s(%d)\n", __func__, enable);
 488
 489         if (enable)
 490                 return tda10048_writereg(state, TDA10048_CONF_C4_1,
 491                         tda10048_readreg(state, TDA10048_CONF_C4_1) | 0x02);
 492         else
 493                 return tda10048_writereg(state, TDA10048_CONF_C4_1,
 494                         tda10048_readreg(state, TDA10048_CONF_C4_1) & 0xfd);
 495 }
 496
 497 static int tda10048_output_mode(struct dvb_frontend *fe, int serial)
 498 {
 499         struct tda10048_state *state = fe->demodulator_priv;
 500         dprintk(1, "%s(%d)\n", __func__, serial);
 501
 502         /* Ensure pins are out of tri-state */
 503         tda10048_writereg(state, TDA10048_CONF_TRISTATE1, 0x21);
 504         tda10048_writereg(state, TDA10048_CONF_TRISTATE2, 0x00);
 505
 506         if (serial) {
 507                 tda10048_writereg(state, TDA10048_IC_MODE, 0x80 | 0x20);
 508                 tda10048_writereg(state, TDA10048_CONF_TS2, 0xc0);
 509         } else {
 510                 tda10048_writereg(state, TDA10048_IC_MODE, 0x00);
 511                 tda10048_writereg(state, TDA10048_CONF_TS2, 0x01);
 512         }
 513
 514         return 0;
 515 }
 516
 517 /* Talk to the demod, set the FEC, GUARD, QAM settings etc */
 518 /* TODO: Support manual tuning with specific params */
 519 static int tda10048_set_frontend(struct dvb_frontend *fe,
 520         struct dvb_frontend_parameters *p)
 521 {
 522         struct tda10048_state *state = fe->demodulator_priv;
 523
 524         dprintk(1, "%s(frequency=%d)\n", __func__, p->frequency);
 525
 526         if (fe->ops.tuner_ops.set_params) {
 527
 528                 if (fe->ops.i2c_gate_ctrl)
 529                         fe->ops.i2c_gate_ctrl(fe, 1);
 530
 531                 fe->ops.tuner_ops.set_params(fe, p);
 532
 533                 if (fe->ops.i2c_gate_ctrl)
 534                         fe->ops.i2c_gate_ctrl(fe, 0);
 535         }
 536
 537         /* Enable demod TPS auto detection and begin acquisition */
 538         tda10048_writereg(state, TDA10048_AUTO, 0x57);
 539
 540         return 0;
 541 }
 542
 543 /* Establish sane defaults and load firmware. */
 544 static int tda10048_init(struct dvb_frontend *fe)
 545 {
 546         struct tda10048_state *state = fe->demodulator_priv;
 547         int ret = 0, i;
 548
 549         dprintk(1, "%s()\n", __func__);
 550
 551         /* Apply register defaults */
 552         for (i = 0; i < ARRAY_SIZE(init_tab); i++)
 553                 tda10048_writereg(state, init_tab[i].reg, init_tab[i].data);
 554
 555         if (state->fwloaded == 0)
 556                 ret = tda10048_firmware_upload(fe);
 557
 558         /* Set either serial or parallel */
 559         tda10048_output_mode(fe, state->config->output_mode);
 560
 561         /* set inversion */
 562         tda10048_set_inversion(fe, state->config->inversion);
 563
 564         /* Ensure we leave the gate closed */
 565         tda10048_i2c_gate_ctrl(fe, 0);
 566
 567         return ret;
 568 }
 569
 570 static int tda10048_read_status(struct dvb_frontend *fe, fe_status_t *status)
 571 {
 572         struct tda10048_state *state = fe->demodulator_priv;
 573         u8 reg;
 574
 575         *status = 0;
 576
 577         reg = tda10048_readreg(state, TDA10048_SYNC_STATUS);
 578
 579         dprintk(1, "%s() status =0x%02x\n", __func__, reg);
 580
 581         if (reg & 0x02)
 582                 *status |= FE_HAS_CARRIER;
 583
 584         if (reg & 0x04)
 585                 *status |= FE_HAS_SIGNAL;
 586
 587         if (reg & 0x08) {
 588                 *status |= FE_HAS_LOCK;
 589                 *status |= FE_HAS_VITERBI;
 590                 *status |= FE_HAS_SYNC;
 591         }
 592
 593         return 0;
 594 }
 595
 596 static int tda10048_read_ber(struct dvb_frontend *fe, u32 *ber)
 597 {
 598         struct tda10048_state *state = fe->demodulator_priv;
 599
 600         dprintk(1, "%s()\n", __func__);
 601
 602         /* TODO: A reset may be required here */
 603         *ber = tda10048_readreg(state, TDA10048_CBER_MSB) << 8 |
 604                 tda10048_readreg(state, TDA10048_CBER_LSB);
 605
 606         return 0;
 607 }
 608
 609 static int tda10048_read_signal_strength(struct dvb_frontend *fe,
 610         u16 *signal_strength)
 611 {
 612         struct tda10048_state *state = fe->demodulator_priv;
 613         u8 v;
 614
 615         dprintk(1, "%s()\n", __func__);
 616
 617         *signal_strength = 65535;
 618
 619         v = tda10048_readreg(state, TDA10048_NP_OUT);
 620         if (v > 0)
 621                 *signal_strength -= (v << 8) | v;
 622
 623         return 0;
 624 }
 625
 626 /* SNR lookup table */
 627 static struct snr_tab {
 628         u8 val;
 629         u8 data;
 630 } snr_tab[] = {
 631         {   0,   0 },
 632         {   1, 246 },
 633         {   2, 215 },
 634         {   3, 198 },
 635         {   4, 185 },
 636         {   5, 176 },
 637         {   6, 168 },
 638         {   7, 161 },
 639         {   8, 155 },
 640         {   9, 150 },
 641         {  10, 146 },
 642         {  11, 141 },
 643         {  12, 138 },
 644         {  13, 134 },
 645         {  14, 131 },
 646         {  15, 128 },
 647         {  16, 125 },
 648         {  17, 122 },
 649         {  18, 120 },
 650         {  19, 118 },
 651         {  20, 115 },
 652         {  21, 113 },
 653         {  22, 111 },
 654         {  23, 109 },
 655         {  24, 107 },
 656         {  25, 106 },
 657         {  26, 104 },
 658         {  27, 102 },
 659         {  28, 101 },
 660         {  29,  99 },
 661         {  30,  98 },
 662         {  31,  96 },
 663         {  32,  95 },
 664         {  33,  94 },
 665         {  34,  92 },
 666         {  35,  91 },
 667         {  36,  90 },
 668         {  37,  89 },
 669         {  38,  88 },
 670         {  39,  86 },
 671         {  40,  85 },
 672         {  41,  84 },
 673         {  42,  83 },
 674         {  43,  82 },
 675         {  44,  81 },
 676         {  45,  80 },
 677         {  46,  79 },
 678         {  47,  78 },
 679         {  48,  77 },
 680         {  49,  76 },
 681         {  50,  76 },
 682         {  51,  75 },
 683         {  52,  74 },
 684         {  53,  73 },
 685         {  54,  72 },
 686         {  56,  71 },
 687         {  57,  70 },
 688         {  58,  69 },
 689         {  60,  68 },
 690         {  61,  67 },
 691         {  63,  66 },
 692         {  64,  65 },
 693         {  66,  64 },
 694         {  67,  63 },
 695         {  68,  62 },
 696         {  69,  62 },
 697         {  70,  61 },
 698         {  72,  60 },
 699         {  74,  59 },
 700         {  75,  58 },
 701         {  77,  57 },
 702         {  79,  56 },
 703         {  81,  55 },
 704         {  83,  54 },
 705         {  85,  53 },
 706         {  87,  52 },
 707         {  89,  51 },
 708         {  91,  50 },
 709         {  93,  49 },
 710         {  95,  48 },
 711         {  97,  47 },
 712         { 100,  46 },
 713         { 102,  45 },
 714         { 104,  44 },
 715         { 107,  43 },
 716         { 109,  42 },
 717         { 112,  41 },
 718         { 114,  40 },
 719         { 117,  39 },
 720         { 120,  38 },
 721         { 123,  37 },
 722         { 125,  36 },
 723         { 128,  35 },
 724         { 131,  34 },
 725         { 134,  33 },
 726         { 138,  32 },
 727         { 141,  31 },
 728         { 144,  30 },
 729         { 147,  29 },
 730         { 151,  28 },
 731         { 154,  27 },
 732         { 158,  26 },
 733         { 162,  25 },
 734         { 165,  24 },
 735         { 169,  23 },
 736         { 173,  22 },
 737         { 177,  21 },
 738         { 181,  20 },
 739         { 186,  19 },
 740         { 190,  18 },
 741         { 194,  17 },
 742         { 199,  16 },
 743         { 204,  15 },
 744         { 208,  14 },
 745         { 213,  13 },
 746         { 218,  12 },
 747         { 223,  11 },
 748         { 229,  10 },
 749         { 234,   9 },
 750         { 239,   8 },
 751         { 245,   7 },
 752         { 251,   6 },
 753         { 255,   5 },
 754 };
 755
 756 static int tda10048_read_snr(struct dvb_frontend *fe, u16 *snr)
 757 {
 758         struct tda10048_state *state = fe->demodulator_priv;
 759         u8 v;
 760         int i, ret = -EINVAL;
 761
 762         dprintk(1, "%s()\n", __func__);
 763
 764         v = tda10048_readreg(state, TDA10048_NP_OUT);
 765         for (i = 0; i < ARRAY_SIZE(snr_tab); i++) {
 766                 if (v <= snr_tab[i].val) {
 767                         *snr = snr_tab[i].data;
 768                         ret = 0;
 769                         break;
 770                 }
 771         }
 772
 773         return ret;
 774 }
 775
 776 static int tda10048_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
 777 {
 778         struct tda10048_state *state = fe->demodulator_priv;
 779
 780         dprintk(1, "%s()\n", __func__);
 781
 782         *ucblocks = tda10048_readreg(state, TDA10048_UNCOR_CPT_MSB) << 8 |
 783                 tda10048_readreg(state, TDA10048_UNCOR_CPT_LSB);
 784
 785         return 0;
 786 }
 787
 788 static int tda10048_get_frontend(struct dvb_frontend *fe,
 789         struct dvb_frontend_parameters *p)
 790 {
 791         struct tda10048_state *state = fe->demodulator_priv;
 792
 793         dprintk(1, "%s()\n", __func__);
 794
 795         p->inversion = tda10048_readreg(state, TDA10048_CONF_C1_1)
 796                 & 0x20 ? INVERSION_ON : INVERSION_OFF;
 797
 798         return tda10048_get_tps(state, &p->u.ofdm);
 799 }
 800
 801 static int tda10048_get_tune_settings(struct dvb_frontend *fe,
 802         struct dvb_frontend_tune_settings *tune)
 803 {
 804         tune->min_delay_ms = 1000;
 805         return 0;
 806 }
 807
 808 static void tda10048_release(struct dvb_frontend *fe)
 809 {
 810         struct tda10048_state *state = fe->demodulator_priv;
 811         dprintk(1, "%s()\n", __func__);
 812         kfree(state);
 813 }
 814
 815 static struct dvb_frontend_ops tda10048_ops;
 816
 817 struct dvb_frontend *tda10048_attach(const struct tda10048_config *config,
 818         struct i2c_adapter *i2c)
 819 {
 820         struct tda10048_state *state = NULL;
 821
 822         dprintk(1, "%s()\n", __func__);
 823
 824         /* allocate memory for the internal state */
 825         state = kmalloc(sizeof(struct tda10048_state), GFP_KERNEL);
 826         if (state == NULL)
 827                 goto error;
 828
 829         /* setup the state */
 830         state->config = config;
 831         state->i2c = i2c;
 832         state->fwloaded = 0;
 833
 834         /* check if the demod is present */
 835         if (tda10048_readreg(state, TDA10048_IDENTITY) != 0x048)
 836                 goto error;
 837
 838         /* create dvb_frontend */
 839         memcpy(&state->frontend.ops, &tda10048_ops,
 840                 sizeof(struct dvb_frontend_ops));
 841         state->frontend.demodulator_priv = state;
 842
 843         /* Leave the gate closed */
 844         tda10048_i2c_gate_ctrl(&state->frontend, 0);
 845
 846         return &state->frontend;
 847
 848 error:
 849         kfree(state);
 850         return NULL;
 851 }
 852 EXPORT_SYMBOL(tda10048_attach);
 853
 854 static struct dvb_frontend_ops tda10048_ops = {
 855
 856         .info = {
 857                 .name                   = "NXP TDA10048HN DVB-T",
 858                 .type                   = FE_OFDM,
 859                 .frequency_min          = 177000000,
 860                 .frequency_max          = 858000000,
 861                 .frequency_stepsize     = 166666,
 862                 .caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 863                 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 864                 FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
 865                 FE_CAN_HIERARCHY_AUTO | FE_CAN_GUARD_INTERVAL_AUTO |
 866                 FE_CAN_TRANSMISSION_MODE_AUTO | FE_CAN_RECOVER
 867         },
 868
 869         .release = tda10048_release,
 870         .init = tda10048_init,
 871         .i2c_gate_ctrl = tda10048_i2c_gate_ctrl,
 872         .set_frontend = tda10048_set_frontend,
 873         .get_frontend = tda10048_get_frontend,
 874         .get_tune_settings = tda10048_get_tune_settings,
 875         .read_status = tda10048_read_status,
 876         .read_ber = tda10048_read_ber,
 877         .read_signal_strength = tda10048_read_signal_strength,
 878         .read_snr = tda10048_read_snr,
 879         .read_ucblocks = tda10048_read_ucblocks,
 880 };
 881
 882 module_param(debug, int, 0644);
 883 MODULE_PARM_DESC(debug, "Enable verbose debug messages");
 884
 885 MODULE_DESCRIPTION("NXP TDA10048HN DVB-T Demodulator driver");
 886 MODULE_AUTHOR("Steven Toth");
 887 MODULE_LICENSE("GPL");