err.no Git - linux-2.6/blob - drivers/media/dvb/frontends/tda10048.c

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