drivers/media/dvb/frontends/tda10023.c

   1 /*
   2     TDA10023  - DVB-C decoder
   3     (as used in Philips CU1216-3 NIM and the Reelbox DVB-C tuner card)
   4
   5     Copyright (C) 2005 Georg Acher, BayCom GmbH (acher at baycom dot de)
   6     Copyright (c) 2006 Hartmut Birr (e9hack at gmail dot com)
   7
   8     Remotely based on tda10021.c
   9     Copyright (C) 1999 Convergence Integrated Media GmbH <ralph@convergence.de>
  10     Copyright (C) 2004 Markus Schulz <msc@antzsystem.de>
  11                    Support for TDA10021
  12
  13     This program is free software; you can redistribute it and/or modify
  14     it under the terms of the GNU General Public License as published by
  15     the Free Software Foundation; either version 2 of the License, or
  16     (at your option) any later version.
  17
  18     This program is distributed in the hope that it will be useful,
  19     but WITHOUT ANY WARRANTY; without even the implied warranty of
  20     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21     GNU General Public License for more details.
  22
  23     You should have received a copy of the GNU General Public License
  24     along with this program; if not, write to the Free Software
  25     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  26 */
  27
  28 #include <linux/delay.h>
  29 #include <linux/errno.h>
  30 #include <linux/init.h>
  31 #include <linux/kernel.h>
  32 #include <linux/module.h>
  33 #include <linux/string.h>
  34 #include <linux/slab.h>
  35
  36 #include <asm/div64.h>
  37
  38 #include "dvb_frontend.h"
  39 #include "tda1002x.h"
  40
  41
  42 struct tda10023_state {
  43         struct i2c_adapter* i2c;
  44         /* configuration settings */
  45         const struct tda1002x_config* config;
  46         struct dvb_frontend frontend;
  47
  48         u8 pwm;
  49         u8 reg0;
  50 };
  51
  52
  53 #define dprintk(x...)
  54
  55 static int verbose;
  56
  57 #define XTAL   28920000UL
  58 #define PLL_M  8UL
  59 #define PLL_P  4UL
  60 #define PLL_N  1UL
  61 #define SYSCLK (XTAL*PLL_M/(PLL_N*PLL_P))  // -> 57840000
  62
  63 static u8 tda10023_inittab[]={
  64         // reg mask val
  65         0x2a,0xff,0x02,  // PLL3, Bypass, Power Down
  66         0xff,0x64,0x00,  // Sleep 100ms
  67         0x2a,0xff,0x03,  // PLL3, Bypass, Power Down
  68         0xff,0x64,0x00,  // Sleep 100ms
  69         0x28,0xff,PLL_M-1,  // PLL1 M=8
  70         0x29,0xff,((PLL_P-1)<<6)|(PLL_N-1),  // PLL2
  71         0x00,0xff,0x23,  // GPR FSAMPLING=1
  72         0x2a,0xff,0x08,  // PLL3 PSACLK=1
  73         0xff,0x64,0x00,  // Sleep 100ms
  74         0x1f,0xff,0x00,  // RESET
  75         0xff,0x64,0x00,  // Sleep 100ms
  76         0xe6,0x0c,0x04,  // RSCFG_IND
  77         0x10,0xc0,0x80,  // DECDVBCFG1 PBER=1
  78
  79         0x0e,0xff,0x82,  // GAIN1
  80         0x03,0x08,0x08,  // CLKCONF DYN=1
  81         0x2e,0xbf,0x30,  // AGCCONF2 TRIAGC=0,POSAGC=ENAGCIF=1 PPWMTUN=0 PPWMIF=0
  82         0x01,0xff,0x30,  // AGCREF
  83         0x1e,0x84,0x84,  // CONTROL SACLK_ON=1
  84         0x1b,0xff,0xc8,  // ADC TWOS=1
  85         0x3b,0xff,0xff,  // IFMAX
  86         0x3c,0xff,0x00,  // IFMIN
  87         0x34,0xff,0x00,  // PWMREF
  88         0x35,0xff,0xff,  // TUNMAX
  89         0x36,0xff,0x00,  // TUNMIN
  90         0x06,0xff,0x7f,  // EQCONF1 POSI=7 ENADAPT=ENEQUAL=DFE=1    // 0x77
  91         0x1c,0x30,0x30,  // EQCONF2 STEPALGO=SGNALGO=1
  92         0x37,0xff,0xf6,  // DELTAF_LSB
  93         0x38,0xff,0xff,  // DELTAF_MSB
  94         0x02,0xff,0x93,  // AGCCONF1  IFS=1 KAGCIF=2 KAGCTUN=3
  95         0x2d,0xff,0xf6,  // SWEEP SWPOS=1 SWDYN=7 SWSTEP=1 SWLEN=2
  96         0x04,0x10,0x00,   // SWRAMP=1
  97         0x12,0xff,0xa1,  // INTP1 POCLKP=1 FEL=1 MFS=0
  98         0x2b,0x01,0xa1,  // INTS1
  99         0x20,0xff,0x04,  // INTP2 SWAPP=? MSBFIRSTP=? INTPSEL=?
 100         0x2c,0xff,0x0d,  // INTP/S TRIP=0 TRIS=0
 101         0xc4,0xff,0x00,
 102         0xc3,0x30,0x00,
 103         0xb5,0xff,0x19,  // ERAGC_THD
 104         0x00,0x03,0x01,  // GPR, CLBS soft reset
 105         0x00,0x03,0x03,  // GPR, CLBS soft reset
 106         0xff,0x64,0x00,  // Sleep 100ms
 107         0xff,0xff,0xff
 108 };
 109
 110 static u8 tda10023_readreg (struct tda10023_state* state, u8 reg)
 111 {
 112         u8 b0 [] = { reg };
 113         u8 b1 [] = { 0 };
 114         struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = b0, .len = 1 },
 115                                   { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b1, .len = 1 } };
 116         int ret;
 117
 118         ret = i2c_transfer (state->i2c, msg, 2);
 119         if (ret != 2)
 120                 printk("DVB: TDA10023: %s: readreg error (ret == %i)\n",
 121                                  __func__, ret);
 122         return b1[0];
 123 }
 124
 125 static int tda10023_writereg (struct tda10023_state* state, u8 reg, u8 data)
 126 {
 127         u8 buf[] = { reg, data };
 128         struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
 129         int ret;
 130
 131         ret = i2c_transfer (state->i2c, &msg, 1);
 132         if (ret != 1)
 133                 printk("DVB: TDA10023(%d): %s, writereg error "
 134                         "(reg == 0x%02x, val == 0x%02x, ret == %i)\n",
 135                         state->frontend.dvb->num, __func__, reg, data, ret);
 136
 137         return (ret != 1) ? -EREMOTEIO : 0;
 138 }
 139
 140
 141 static int tda10023_writebit (struct tda10023_state* state, u8 reg, u8 mask,u8 data)
 142 {
 143         if (mask==0xff)
 144                 return tda10023_writereg(state, reg, data);
 145         else {
 146                 u8 val;
 147                 val=tda10023_readreg(state,reg);
 148                 val&=~mask;
 149                 val|=(data&mask);
 150                 return tda10023_writereg(state, reg, val);
 151         }
 152 }
 153
 154 static void tda10023_writetab(struct tda10023_state* state, u8* tab)
 155 {
 156         u8 r,m,v;
 157         while (1) {
 158                 r=*tab++;
 159                 m=*tab++;
 160                 v=*tab++;
 161                 if (r==0xff) {
 162                         if (m==0xff)
 163                                 break;
 164                         else
 165                                 msleep(m);
 166                 }
 167                 else
 168                         tda10023_writebit(state,r,m,v);
 169         }
 170 }
 171
 172 //get access to tuner
 173 static int lock_tuner(struct tda10023_state* state)
 174 {
 175         u8 buf[2] = { 0x0f, 0xc0 };
 176         struct i2c_msg msg = {.addr=state->config->demod_address, .flags=0, .buf=buf, .len=2};
 177
 178         if(i2c_transfer(state->i2c, &msg, 1) != 1)
 179         {
 180                 printk("tda10023: lock tuner fails\n");
 181                 return -EREMOTEIO;
 182         }
 183         return 0;
 184 }
 185
 186 //release access from tuner
 187 static int unlock_tuner(struct tda10023_state* state)
 188 {
 189         u8 buf[2] = { 0x0f, 0x40 };
 190         struct i2c_msg msg_post={.addr=state->config->demod_address, .flags=0, .buf=buf, .len=2};
 191
 192         if(i2c_transfer(state->i2c, &msg_post, 1) != 1)
 193         {
 194                 printk("tda10023: unlock tuner fails\n");
 195                 return -EREMOTEIO;
 196         }
 197         return 0;
 198 }
 199
 200 static int tda10023_setup_reg0 (struct tda10023_state* state, u8 reg0)
 201 {
 202         reg0 |= state->reg0 & 0x63;
 203
 204         tda10023_writereg (state, 0x00, reg0 & 0xfe);
 205         tda10023_writereg (state, 0x00, reg0 | 0x01);
 206
 207         state->reg0 = reg0;
 208         return 0;
 209 }
 210
 211 static int tda10023_set_symbolrate (struct tda10023_state* state, u32 sr)
 212 {
 213         s32 BDR;
 214         s32 BDRI;
 215         s16 SFIL=0;
 216         u16 NDEC = 0;
 217
 218         if (sr < (u32)(SYSCLK/98.40)) {
 219                 NDEC=3;
 220                 SFIL=1;
 221         } else if (sr<(u32)(SYSCLK/64.0)) {
 222                 NDEC=3;
 223                 SFIL=0;
 224         } else if (sr<(u32)(SYSCLK/49.2)) {
 225                 NDEC=2;
 226                 SFIL=1;
 227         } else if (sr<(u32)(SYSCLK/32.0)) {
 228                 NDEC=2;
 229                 SFIL=0;
 230         } else if (sr<(u32)(SYSCLK/24.6)) {
 231                 NDEC=1;
 232                 SFIL=1;
 233         } else if (sr<(u32)(SYSCLK/16.0)) {
 234                 NDEC=1;
 235                 SFIL=0;
 236         } else if (sr<(u32)(SYSCLK/12.3)) {
 237                 NDEC=0;
 238                 SFIL=1;
 239         }
 240
 241         BDRI=SYSCLK*16;
 242         BDRI>>=NDEC;
 243         BDRI +=sr/2;
 244         BDRI /=sr;
 245
 246         if (BDRI>255)
 247                 BDRI=255;
 248
 249         {
 250                 u64 BDRX;
 251
 252                 BDRX=1<<(24+NDEC);
 253                 BDRX*=sr;
 254                 do_div(BDRX,SYSCLK);    // BDRX/=SYSCLK;
 255
 256                 BDR=(s32)BDRX;
 257         }
 258 //      printk("Symbolrate %i, BDR %i BDRI %i, NDEC %i\n",sr,BDR,BDRI,NDEC);
 259         tda10023_writebit (state, 0x03, 0xc0, NDEC<<6);
 260         tda10023_writereg (state, 0x0a, BDR&255);
 261         tda10023_writereg (state, 0x0b, (BDR>>8)&255);
 262         tda10023_writereg (state, 0x0c, (BDR>>16)&31);
 263         tda10023_writereg (state, 0x0d, BDRI);
 264         tda10023_writereg (state, 0x3d, (SFIL<<7));
 265         return 0;
 266 }
 267
 268 static int tda10023_init (struct dvb_frontend *fe)
 269 {
 270         struct tda10023_state* state = fe->demodulator_priv;
 271
 272         dprintk("DVB: TDA10023(%d): init chip\n", fe->adapter->num);
 273
 274         tda10023_writetab(state, tda10023_inittab);
 275
 276         return 0;
 277 }
 278
 279 static int tda10023_set_parameters (struct dvb_frontend *fe,
 280                             struct dvb_frontend_parameters *p)
 281 {
 282         struct tda10023_state* state = fe->demodulator_priv;
 283
 284         static int qamvals[6][6] = {
 285                 //  QAM   LOCKTHR  MSETH   AREF AGCREFNYQ  ERAGCNYQ_THD
 286                 { (5<<2),  0x78,    0x8c,   0x96,   0x78,   0x4c  },  // 4 QAM
 287                 { (0<<2),  0x87,    0xa2,   0x91,   0x8c,   0x57  },  // 16 QAM
 288                 { (1<<2),  0x64,    0x74,   0x96,   0x8c,   0x57  },  // 32 QAM
 289                 { (2<<2),  0x46,    0x43,   0x6a,   0x6a,   0x44  },  // 64 QAM
 290                 { (3<<2),  0x36,    0x34,   0x7e,   0x78,   0x4c  },  // 128 QAM
 291                 { (4<<2),  0x26,    0x23,   0x6c,   0x5c,   0x3c  },  // 256 QAM
 292         };
 293
 294         int qam = p->u.qam.modulation;
 295
 296         if (qam < 0 || qam > 5)
 297                 return -EINVAL;
 298
 299         if (fe->ops.tuner_ops.set_params) {
 300                 fe->ops.tuner_ops.set_params(fe, p);
 301                 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
 302         }
 303
 304         tda10023_set_symbolrate (state, p->u.qam.symbol_rate);
 305         tda10023_writereg (state, 0x05, qamvals[qam][1]);
 306         tda10023_writereg (state, 0x08, qamvals[qam][2]);
 307         tda10023_writereg (state, 0x09, qamvals[qam][3]);
 308         tda10023_writereg (state, 0xb4, qamvals[qam][4]);
 309         tda10023_writereg (state, 0xb6, qamvals[qam][5]);
 310
 311 //      tda10023_writereg (state, 0x04, (p->inversion?0x12:0x32));
 312 //      tda10023_writebit (state, 0x04, 0x60, (p->inversion?0:0x20));
 313         tda10023_writebit (state, 0x04, 0x40, 0x40);
 314         tda10023_setup_reg0 (state, qamvals[qam][0]);
 315
 316         return 0;
 317 }
 318
 319 static int tda10023_read_status(struct dvb_frontend* fe, fe_status_t* status)
 320 {
 321         struct tda10023_state* state = fe->demodulator_priv;
 322         int sync;
 323
 324         *status = 0;
 325
 326         //0x11[1] == CARLOCK -> Carrier locked
 327         //0x11[2] == FSYNC -> Frame synchronisation
 328         //0x11[3] == FEL -> Front End locked
 329         //0x11[6] == NODVB -> DVB Mode Information
 330         sync = tda10023_readreg (state, 0x11);
 331
 332         if (sync & 2)
 333                 *status |= FE_HAS_SIGNAL|FE_HAS_CARRIER;
 334
 335         if (sync & 4)
 336                 *status |= FE_HAS_SYNC|FE_HAS_VITERBI;
 337
 338         if (sync & 8)
 339                 *status |= FE_HAS_LOCK;
 340
 341         return 0;
 342 }
 343
 344 static int tda10023_read_ber(struct dvb_frontend* fe, u32* ber)
 345 {
 346         struct tda10023_state* state = fe->demodulator_priv;
 347         u8 a,b,c;
 348         a=tda10023_readreg(state, 0x14);
 349         b=tda10023_readreg(state, 0x15);
 350         c=tda10023_readreg(state, 0x16)&0xf;
 351         tda10023_writebit (state, 0x10, 0xc0, 0x00);
 352
 353         *ber = a | (b<<8)| (c<<16);
 354         return 0;
 355 }
 356
 357 static int tda10023_read_signal_strength(struct dvb_frontend* fe, u16* strength)
 358 {
 359         struct tda10023_state* state = fe->demodulator_priv;
 360         u8 ifgain=tda10023_readreg(state, 0x2f);
 361
 362         u16 gain = ((255-tda10023_readreg(state, 0x17))) + (255-ifgain)/16;
 363         // Max raw value is about 0xb0 -> Normalize to >0xf0 after 0x90
 364         if (gain>0x90)
 365                 gain=gain+2*(gain-0x90);
 366         if (gain>255)
 367                 gain=255;
 368
 369         *strength = (gain<<8)|gain;
 370         return 0;
 371 }
 372
 373 static int tda10023_read_snr(struct dvb_frontend* fe, u16* snr)
 374 {
 375         struct tda10023_state* state = fe->demodulator_priv;
 376
 377         u8 quality = ~tda10023_readreg(state, 0x18);
 378         *snr = (quality << 8) | quality;
 379         return 0;
 380 }
 381
 382 static int tda10023_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
 383 {
 384         struct tda10023_state* state = fe->demodulator_priv;
 385         u8 a,b,c,d;
 386         a= tda10023_readreg (state, 0x74);
 387         b= tda10023_readreg (state, 0x75);
 388         c= tda10023_readreg (state, 0x76);
 389         d= tda10023_readreg (state, 0x77);
 390         *ucblocks = a | (b<<8)|(c<<16)|(d<<24);
 391
 392         tda10023_writebit (state, 0x10, 0x20,0x00);
 393         tda10023_writebit (state, 0x10, 0x20,0x20);
 394         tda10023_writebit (state, 0x13, 0x01, 0x00);
 395
 396         return 0;
 397 }
 398
 399 static int tda10023_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
 400 {
 401         struct tda10023_state* state = fe->demodulator_priv;
 402         int sync,inv;
 403         s8 afc = 0;
 404
 405         sync = tda10023_readreg(state, 0x11);
 406         afc = tda10023_readreg(state, 0x19);
 407         inv = tda10023_readreg(state, 0x04);
 408
 409         if (verbose) {
 410                 /* AFC only valid when carrier has been recovered */
 411                 printk(sync & 2 ? "DVB: TDA10023(%d): AFC (%d) %dHz\n" :
 412                                   "DVB: TDA10023(%d): [AFC (%d) %dHz]\n",
 413                         state->frontend.dvb->num, afc,
 414                        -((s32)p->u.qam.symbol_rate * afc) >> 10);
 415         }
 416
 417         p->inversion = (inv&0x20?0:1);
 418         p->u.qam.modulation = ((state->reg0 >> 2) & 7) + QAM_16;
 419
 420         p->u.qam.fec_inner = FEC_NONE;
 421         p->frequency = ((p->frequency + 31250) / 62500) * 62500;
 422
 423         if (sync & 2)
 424                 p->frequency -= ((s32)p->u.qam.symbol_rate * afc) >> 10;
 425
 426         return 0;
 427 }
 428
 429 static int tda10023_sleep(struct dvb_frontend* fe)
 430 {
 431         struct tda10023_state* state = fe->demodulator_priv;
 432
 433         tda10023_writereg (state, 0x1b, 0x02);  /* pdown ADC */
 434         tda10023_writereg (state, 0x00, 0x80);  /* standby */
 435
 436         return 0;
 437 }
 438
 439 static int tda10023_i2c_gate_ctrl(struct dvb_frontend* fe, int enable)
 440 {
 441         struct tda10023_state* state = fe->demodulator_priv;
 442
 443         if (enable) {
 444                 lock_tuner(state);
 445         } else {
 446                 unlock_tuner(state);
 447         }
 448         return 0;
 449 }
 450
 451 static void tda10023_release(struct dvb_frontend* fe)
 452 {
 453         struct tda10023_state* state = fe->demodulator_priv;
 454         kfree(state);
 455 }
 456
 457 static struct dvb_frontend_ops tda10023_ops;
 458
 459 struct dvb_frontend* tda10023_attach(const struct tda1002x_config* config,
 460                                      struct i2c_adapter* i2c,
 461                                      u8 pwm)
 462 {
 463         struct tda10023_state* state = NULL;
 464         int i;
 465
 466         /* allocate memory for the internal state */
 467         state = kmalloc(sizeof(struct tda10023_state), GFP_KERNEL);
 468         if (state == NULL) goto error;
 469
 470         /* setup the state */
 471         state->config = config;
 472         state->i2c = i2c;
 473         memcpy(&state->frontend.ops, &tda10023_ops, sizeof(struct dvb_frontend_ops));
 474         state->pwm = pwm;
 475         for (i=0; i < ARRAY_SIZE(tda10023_inittab);i+=3) {
 476                 if (tda10023_inittab[i] == 0x00) {
 477                         state->reg0 = tda10023_inittab[i+2];
 478                         break;
 479                 }
 480         }
 481
 482         // Wakeup if in standby
 483         tda10023_writereg (state, 0x00, 0x33);
 484         /* check if the demod is there */
 485         if ((tda10023_readreg(state, 0x1a) & 0xf0) != 0x70) goto error;
 486
 487         /* create dvb_frontend */
 488         memcpy(&state->frontend.ops, &tda10023_ops, sizeof(struct dvb_frontend_ops));
 489         state->frontend.demodulator_priv = state;
 490         return &state->frontend;
 491
 492 error:
 493         kfree(state);
 494         return NULL;
 495 }
 496
 497 static struct dvb_frontend_ops tda10023_ops = {
 498
 499         .info = {
 500                 .name = "Philips TDA10023 DVB-C",
 501                 .type = FE_QAM,
 502                 .frequency_stepsize = 62500,
 503                 .frequency_min = 47000000,
 504                 .frequency_max = 862000000,
 505                 .symbol_rate_min = (SYSCLK/2)/64,     /* SACLK/64 == (SYSCLK/2)/64 */
 506                 .symbol_rate_max = (SYSCLK/2)/4,      /* SACLK/4 */
 507                 .caps = 0x400 | //FE_CAN_QAM_4
 508                         FE_CAN_QAM_16 | FE_CAN_QAM_32 | FE_CAN_QAM_64 |
 509                         FE_CAN_QAM_128 | FE_CAN_QAM_256 |
 510                         FE_CAN_FEC_AUTO
 511         },
 512
 513         .release = tda10023_release,
 514
 515         .init = tda10023_init,
 516         .sleep = tda10023_sleep,
 517         .i2c_gate_ctrl = tda10023_i2c_gate_ctrl,
 518
 519         .set_frontend = tda10023_set_parameters,
 520         .get_frontend = tda10023_get_frontend,
 521
 522         .read_status = tda10023_read_status,
 523         .read_ber = tda10023_read_ber,
 524         .read_signal_strength = tda10023_read_signal_strength,
 525         .read_snr = tda10023_read_snr,
 526         .read_ucblocks = tda10023_read_ucblocks,
 527 };
 528
 529
 530 MODULE_DESCRIPTION("Philips TDA10023 DVB-C demodulator driver");
 531 MODULE_AUTHOR("Georg Acher, Hartmut Birr");
 532 MODULE_LICENSE("GPL");
 533
 534 EXPORT_SYMBOL(tda10023_attach);