release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/media/dvb/frontends/tda10021.c

   1 /*
   2     TDA10021  - Single Chip Cable Channel Receiver driver module
   3                used on the Siemens DVB-C cards
   4
   5     Copyright (C) 1999 Convergence Integrated Media GmbH <ralph@convergence.de>
   6     Copyright (C) 2004 Markus Schulz <msc@antzsystem.de>
   7                    Support for TDA10021
   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/delay.h>
  25 #include <linux/errno.h>
  26 #include <linux/init.h>
  27 #include <linux/kernel.h>
  28 #include <linux/module.h>
  29 #include <linux/string.h>
  30 #include <linux/slab.h>
  31
  32 #include "dvb_frontend.h"
  33 #include "tda1002x.h"
  34
  35
  36 struct tda10021_state {
  37         struct i2c_adapter* i2c;
  38         /* configuration settings */
  39         const struct tda1002x_config* config;
  40         struct dvb_frontend frontend;
  41
  42         u8 pwm;
  43         u8 reg0;
  44 };
  45
  46
  47 #define dprintk(x...)
  48
  49 static int verbose;
  50
  51 #define XIN 57840000UL
  52
  53 #define FIN (XIN >> 4)
  54
  55 static int tda10021_inittab_size = 0x40;
  56 static u8 tda10021_inittab[0x40]=
  57 {
  58         0x73, 0x6a, 0x23, 0x0a, 0x02, 0x37, 0x77, 0x1a,
  59         0x37, 0x6a, 0x17, 0x8a, 0x1e, 0x86, 0x43, 0x40,
  60         0xb8, 0x3f, 0xa1, 0x00, 0xcd, 0x01, 0x00, 0xff,
  61         0x11, 0x00, 0x7c, 0x31, 0x30, 0x20, 0x00, 0x00,
  62         0x02, 0x00, 0x00, 0x7d, 0x00, 0x00, 0x00, 0x00,
  63         0x07, 0x00, 0x33, 0x11, 0x0d, 0x95, 0x08, 0x58,
  64         0x00, 0x00, 0x80, 0x00, 0x80, 0xff, 0x00, 0x00,
  65         0x04, 0x2d, 0x2f, 0xff, 0x00, 0x00, 0x00, 0x00,
  66 };
  67
  68 static int _tda10021_writereg (struct tda10021_state* state, u8 reg, u8 data)
  69 {
  70         u8 buf[] = { reg, data };
  71         struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
  72         int ret;
  73
  74         ret = i2c_transfer (state->i2c, &msg, 1);
  75         if (ret != 1)
  76                 printk("DVB: TDA10021(%d): %s, writereg error "
  77                         "(reg == 0x%02x, val == 0x%02x, ret == %i)\n",
  78                         state->frontend.dvb->num, __func__, reg, data, ret);
  79
  80         msleep(10);
  81         return (ret != 1) ? -EREMOTEIO : 0;
  82 }
  83
  84 static u8 tda10021_readreg (struct tda10021_state* state, u8 reg)
  85 {
  86         u8 b0 [] = { reg };
  87         u8 b1 [] = { 0 };
  88         struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = b0, .len = 1 },
  89                                   { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 } };
  90         int ret;
  91
  92         ret = i2c_transfer (state->i2c, msg, 2);
  93         // Don't print an error message if the id is read.
  94         if (ret != 2 && reg != 0x1a)
  95                 printk("DVB: TDA10021: %s: readreg error (ret == %i)\n",
  96                                 __func__, ret);
  97         return b1[0];
  98 }
  99
 100 //get access to tuner
 101 static int lock_tuner(struct tda10021_state* state)
 102 {
 103         u8 buf[2] = { 0x0f, tda10021_inittab[0x0f] | 0x80 };
 104         struct i2c_msg msg = {.addr=state->config->demod_address, .flags=0, .buf=buf, .len=2};
 105
 106         if(i2c_transfer(state->i2c, &msg, 1) != 1)
 107         {
 108                 printk("tda10021: lock tuner fails\n");
 109                 return -EREMOTEIO;
 110         }
 111         return 0;
 112 }
 113
 114 //release access from tuner
 115 static int unlock_tuner(struct tda10021_state* state)
 116 {
 117         u8 buf[2] = { 0x0f, tda10021_inittab[0x0f] & 0x7f };
 118         struct i2c_msg msg_post={.addr=state->config->demod_address, .flags=0, .buf=buf, .len=2};
 119
 120         if(i2c_transfer(state->i2c, &msg_post, 1) != 1)
 121         {
 122                 printk("tda10021: unlock tuner fails\n");
 123                 return -EREMOTEIO;
 124         }
 125         return 0;
 126 }
 127
 128 static int tda10021_setup_reg0 (struct tda10021_state* state, u8 reg0,
 129                                 fe_spectral_inversion_t inversion)
 130 {
 131         reg0 |= state->reg0 & 0x63;
 132
 133         if ((INVERSION_ON == inversion) ^ (state->config->invert == 0))
 134                 reg0 &= ~0x20;
 135         else
 136                 reg0 |= 0x20;
 137
 138         _tda10021_writereg (state, 0x00, reg0 & 0xfe);
 139         _tda10021_writereg (state, 0x00, reg0 | 0x01);
 140
 141         state->reg0 = reg0;
 142         return 0;
 143 }
 144
 145 static int tda10021_set_symbolrate (struct tda10021_state* state, u32 symbolrate)
 146 {
 147         s32 BDR;
 148         s32 BDRI;
 149         s16 SFIL=0;
 150         u16 NDEC = 0;
 151         u32 tmp, ratio;
 152
 153         if (symbolrate > XIN/2)
 154                 symbolrate = XIN/2;
 155         if (symbolrate < 500000)
 156                 symbolrate = 500000;
 157
 158         if (symbolrate < XIN/16) NDEC = 1;
 159         if (symbolrate < XIN/32) NDEC = 2;
 160         if (symbolrate < XIN/64) NDEC = 3;
 161
 162         if (symbolrate < (u32)(XIN/12.3)) SFIL = 1;
 163         if (symbolrate < (u32)(XIN/16))  SFIL = 0;
 164         if (symbolrate < (u32)(XIN/24.6)) SFIL = 1;
 165         if (symbolrate < (u32)(XIN/32))  SFIL = 0;
 166         if (symbolrate < (u32)(XIN/49.2)) SFIL = 1;
 167         if (symbolrate < (u32)(XIN/64))  SFIL = 0;
 168         if (symbolrate < (u32)(XIN/98.4)) SFIL = 1;
 169
 170         symbolrate <<= NDEC;
 171         ratio = (symbolrate << 4) / FIN;
 172         tmp =  ((symbolrate << 4) % FIN) << 8;
 173         ratio = (ratio << 8) + tmp / FIN;
 174         tmp = (tmp % FIN) << 8;
 175         ratio = (ratio << 8) + DIV_ROUND_CLOSEST(tmp, FIN);
 176
 177         BDR = ratio;
 178         BDRI = (((XIN << 5) / symbolrate) + 1) / 2;
 179
 180         if (BDRI > 0xFF)
 181                 BDRI = 0xFF;
 182
 183         SFIL = (SFIL << 4) | tda10021_inittab[0x0E];
 184
 185         NDEC = (NDEC << 6) | tda10021_inittab[0x03];
 186
 187         _tda10021_writereg (state, 0x03, NDEC);
 188         _tda10021_writereg (state, 0x0a, BDR&0xff);
 189         _tda10021_writereg (state, 0x0b, (BDR>> 8)&0xff);
 190         _tda10021_writereg (state, 0x0c, (BDR>>16)&0x3f);
 191
 192         _tda10021_writereg (state, 0x0d, BDRI);
 193         _tda10021_writereg (state, 0x0e, SFIL);
 194
 195         return 0;
 196 }
 197
 198 static int tda10021_init (struct dvb_frontend *fe)
 199 {
 200         struct tda10021_state* state = fe->demodulator_priv;
 201         int i;
 202
 203         dprintk("DVB: TDA10021(%d): init chip\n", fe->adapter->num);
 204
 205         //_tda10021_writereg (fe, 0, 0);
 206
 207         for (i=0; i<tda10021_inittab_size; i++)
 208                 _tda10021_writereg (state, i, tda10021_inittab[i]);
 209
 210         _tda10021_writereg (state, 0x34, state->pwm);
 211
 212         //Comment by markus
 213         //0x2A[3-0] == PDIV -> P multiplaying factor (P=PDIV+1)(default 0)
 214         //0x2A[4] == BYPPLL -> Power down mode (default 1)
 215         //0x2A[5] == LCK -> PLL Lock Flag
 216         //0x2A[6] == POLAXIN -> Polarity of the input reference clock (default 0)
 217
 218         //Activate PLL
 219         _tda10021_writereg(state, 0x2a, tda10021_inittab[0x2a] & 0xef);
 220         return 0;
 221 }
 222
 223 static int tda10021_set_parameters (struct dvb_frontend *fe,
 224                             struct dvb_frontend_parameters *p)
 225 {
 226         struct tda10021_state* state = fe->demodulator_priv;
 227
 228         //table for QAM4-QAM256 ready  QAM4  QAM16 QAM32 QAM64 QAM128 QAM256
 229         //CONF
 230         static const u8 reg0x00 [] = { 0x14, 0x00, 0x04, 0x08, 0x0c,  0x10 };
 231         //AGCREF value
 232         static const u8 reg0x01 [] = { 0x78, 0x8c, 0x8c, 0x6a, 0x78,  0x5c };
 233         //LTHR value
 234         static const u8 reg0x05 [] = { 0x78, 0x87, 0x64, 0x46, 0x36,  0x26 };
 235         //MSETH
 236         static const u8 reg0x08 [] = { 0x8c, 0xa2, 0x74, 0x43, 0x34,  0x23 };
 237         //AREF
 238         static const u8 reg0x09 [] = { 0x96, 0x91, 0x96, 0x6a, 0x7e,  0x6b };
 239
 240         int qam = p->u.qam.modulation;
 241
 242         if (qam < 0 || qam > 5)
 243                 return -EINVAL;
 244
 245         if (p->inversion != INVERSION_ON && p->inversion != INVERSION_OFF)
 246                 return -EINVAL;
 247
 248         //printk("tda10021: set frequency to %d qam=%d symrate=%d\n", p->frequency,qam,p->u.qam.symbol_rate);
 249
 250         if (fe->ops.tuner_ops.set_params) {
 251                 fe->ops.tuner_ops.set_params(fe, p);
 252                 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
 253         }
 254
 255         tda10021_set_symbolrate (state, p->u.qam.symbol_rate);
 256         _tda10021_writereg (state, 0x34, state->pwm);
 257
 258         _tda10021_writereg (state, 0x01, reg0x01[qam]);
 259         _tda10021_writereg (state, 0x05, reg0x05[qam]);
 260         _tda10021_writereg (state, 0x08, reg0x08[qam]);
 261         _tda10021_writereg (state, 0x09, reg0x09[qam]);
 262
 263         tda10021_setup_reg0 (state, reg0x00[qam], p->inversion);
 264
 265         return 0;
 266 }
 267
 268 static int tda10021_read_status(struct dvb_frontend* fe, fe_status_t* status)
 269 {
 270         struct tda10021_state* state = fe->demodulator_priv;
 271         int sync;
 272
 273         *status = 0;
 274         //0x11[0] == EQALGO -> Equalizer algorithms state
 275         //0x11[1] == CARLOCK -> Carrier locked
 276         //0x11[2] == FSYNC -> Frame synchronisation
 277         //0x11[3] == FEL -> Front End locked
 278         //0x11[6] == NODVB -> DVB Mode Information
 279         sync = tda10021_readreg (state, 0x11);
 280
 281         if (sync & 2)
 282                 *status |= FE_HAS_SIGNAL|FE_HAS_CARRIER;
 283
 284         if (sync & 4)
 285                 *status |= FE_HAS_SYNC|FE_HAS_VITERBI;
 286
 287         if (sync & 8)
 288                 *status |= FE_HAS_LOCK;
 289
 290         return 0;
 291 }
 292
 293 static int tda10021_read_ber(struct dvb_frontend* fe, u32* ber)
 294 {
 295         struct tda10021_state* state = fe->demodulator_priv;
 296
 297         u32 _ber = tda10021_readreg(state, 0x14) |
 298                 (tda10021_readreg(state, 0x15) << 8) |
 299                 ((tda10021_readreg(state, 0x16) & 0x0f) << 16);
 300         _tda10021_writereg(state, 0x10, (tda10021_readreg(state, 0x10) & ~0xc0)
 301                                         | (tda10021_inittab[0x10] & 0xc0));
 302         *ber = 10 * _ber;
 303
 304         return 0;
 305 }
 306
 307 static int tda10021_read_signal_strength(struct dvb_frontend* fe, u16* strength)
 308 {
 309         struct tda10021_state* state = fe->demodulator_priv;
 310
 311         u8 config = tda10021_readreg(state, 0x02);
 312         u8 gain = tda10021_readreg(state, 0x17);
 313         if (config & 0x02)
 314                 /* the agc value is inverted */
 315                 gain = ~gain;
 316         *strength = (gain << 8) | gain;
 317
 318         return 0;
 319 }
 320
 321 static int tda10021_read_snr(struct dvb_frontend* fe, u16* snr)
 322 {
 323         struct tda10021_state* state = fe->demodulator_priv;
 324
 325         u8 quality = ~tda10021_readreg(state, 0x18);
 326         *snr = (quality << 8) | quality;
 327
 328         return 0;
 329 }
 330
 331 static int tda10021_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
 332 {
 333         struct tda10021_state* state = fe->demodulator_priv;
 334
 335         *ucblocks = tda10021_readreg (state, 0x13) & 0x7f;
 336         if (*ucblocks == 0x7f)
 337                 *ucblocks = 0xffffffff;
 338
 339         /* reset uncorrected block counter */
 340         _tda10021_writereg (state, 0x10, tda10021_inittab[0x10] & 0xdf);
 341         _tda10021_writereg (state, 0x10, tda10021_inittab[0x10]);
 342
 343         return 0;
 344 }
 345
 346 static int tda10021_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
 347 {
 348         struct tda10021_state* state = fe->demodulator_priv;
 349         int sync;
 350         s8 afc = 0;
 351
 352         sync = tda10021_readreg(state, 0x11);
 353         afc = tda10021_readreg(state, 0x19);
 354         if (verbose) {
 355                 /* AFC only valid when carrier has been recovered */
 356                 printk(sync & 2 ? "DVB: TDA10021(%d): AFC (%d) %dHz\n" :
 357                                   "DVB: TDA10021(%d): [AFC (%d) %dHz]\n",
 358                         state->frontend.dvb->num, afc,
 359                        -((s32)p->u.qam.symbol_rate * afc) >> 10);
 360         }
 361
 362         p->inversion = ((state->reg0 & 0x20) == 0x20) ^ (state->config->invert != 0) ? INVERSION_ON : INVERSION_OFF;
 363         p->u.qam.modulation = ((state->reg0 >> 2) & 7) + QAM_16;
 364
 365         p->u.qam.fec_inner = FEC_NONE;
 366         p->frequency = ((p->frequency + 31250) / 62500) * 62500;
 367
 368         if (sync & 2)
 369                 p->frequency -= ((s32)p->u.qam.symbol_rate * afc) >> 10;
 370
 371         return 0;
 372 }
 373
 374 static int tda10021_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
 375 {
 376         struct tda10021_state* state = fe->demodulator_priv;
 377
 378         if (enable) {
 379                 lock_tuner(state);
 380         } else {
 381                 unlock_tuner(state);
 382         }
 383         return 0;
 384 }
 385
 386 static int tda10021_sleep(struct dvb_frontend* fe)
 387 {
 388         struct tda10021_state* state = fe->demodulator_priv;
 389
 390         _tda10021_writereg (state, 0x1b, 0x02);  /* pdown ADC */
 391         _tda10021_writereg (state, 0x00, 0x80);  /* standby */
 392
 393         return 0;
 394 }
 395
 396 static void tda10021_release(struct dvb_frontend* fe)
 397 {
 398         struct tda10021_state* state = fe->demodulator_priv;
 399         kfree(state);
 400 }
 401
 402 static struct dvb_frontend_ops tda10021_ops;
 403
 404 struct dvb_frontend* tda10021_attach(const struct tda1002x_config* config,
 405                                      struct i2c_adapter* i2c,
 406                                      u8 pwm)
 407 {
 408         struct tda10021_state* state = NULL;
 409         u8 id;
 410
 411         /* allocate memory for the internal state */
 412         state = kzalloc(sizeof(struct tda10021_state), GFP_KERNEL);
 413         if (state == NULL) goto error;
 414
 415         /* setup the state */
 416         state->config = config;
 417         state->i2c = i2c;
 418         state->pwm = pwm;
 419         state->reg0 = tda10021_inittab[0];
 420
 421         /* check if the demod is there */
 422         id = tda10021_readreg(state, 0x1a);
 423         if ((id & 0xf0) != 0x70) goto error;
 424
 425         /* Don't claim TDA10023 */
 426         if (id == 0x7d)
 427                 goto error;
 428
 429         printk("TDA10021: i2c-addr = 0x%02x, id = 0x%02x\n",
 430                state->config->demod_address, id);
 431
 432         /* create dvb_frontend */
 433         memcpy(&state->frontend.ops, &tda10021_ops, sizeof(struct dvb_frontend_ops));
 434         state->frontend.demodulator_priv = state;
 435         return &state->frontend;
 436
 437 error:
 438         kfree(state);
 439         return NULL;
 440 }
 441
 442 static struct dvb_frontend_ops tda10021_ops = {
 443
 444         .info = {
 445                 .name = "Philips TDA10021 DVB-C",
 446                 .type = FE_QAM,
 447                 .frequency_stepsize = 62500,
 448                 .frequency_min = 47000000,
 449                 .frequency_max = 862000000,
 450                 .symbol_rate_min = (XIN/2)/64,     /* SACLK/64 == (XIN/2)/64 */
 451                 .symbol_rate_max = (XIN/2)/4,      /* SACLK/4 */
 452                 .caps = 0x400 | //FE_CAN_QAM_4
 453                         FE_CAN_QAM_16 | FE_CAN_QAM_32 | FE_CAN_QAM_64 |
 454                         FE_CAN_QAM_128 | FE_CAN_QAM_256 |
 455                         FE_CAN_FEC_AUTO
 456         },
 457
 458         .release = tda10021_release,
 459
 460         .init = tda10021_init,
 461         .sleep = tda10021_sleep,
 462         .i2c_gate_ctrl = tda10021_i2c_gate_ctrl,
 463
 464         .set_frontend = tda10021_set_parameters,
 465         .get_frontend = tda10021_get_frontend,
 466
 467         .read_status = tda10021_read_status,
 468         .read_ber = tda10021_read_ber,
 469         .read_signal_strength = tda10021_read_signal_strength,
 470         .read_snr = tda10021_read_snr,
 471         .read_ucblocks = tda10021_read_ucblocks,
 472 };
 473
 474 module_param(verbose, int, 0644);
 475 MODULE_PARM_DESC(verbose, "print AFC offset after tuning for debugging the PWM setting");
 476
 477 MODULE_DESCRIPTION("Philips TDA10021 DVB-C demodulator driver");
 478 MODULE_AUTHOR("Ralph Metzler, Holger Waechtler, Markus Schulz");
 479 MODULE_LICENSE("GPL");
 480
 481 EXPORT_SYMBOL(tda10021_attach);