release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/media/dvb/frontends/tda8083.c

   1 /*
   2     Driver for Philips TDA8083 based QPSK Demodulator
   3
   4     Copyright (C) 2001 Convergence Integrated Media GmbH
   5
   6     written by Ralph Metzler <ralph@convergence.de>
   7
   8     adoption to the new DVB frontend API and diagnostic ioctl's
   9     by Holger Waechtler <holger@convergence.de>
  10
  11     This program is free software; you can redistribute it and/or modify
  12     it under the terms of the GNU General Public License as published by
  13     the Free Software Foundation; either version 2 of the License, or
  14     (at your option) any later version.
  15
  16     This program is distributed in the hope that it will be useful,
  17     but WITHOUT ANY WARRANTY; without even the implied warranty of
  18     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19     GNU General Public License for more details.
  20
  21     You should have received a copy of the GNU General Public License
  22     along with this program; if not, write to the Free Software
  23     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24
  25 */
  26
  27 #include <linux/init.h>
  28 #include <linux/kernel.h>
  29 #include <linux/module.h>
  30 #include <linux/string.h>
  31 #include <linux/slab.h>
  32 #include <linux/jiffies.h>
  33 #include "dvb_frontend.h"
  34 #include "tda8083.h"
  35
  36
  37 struct tda8083_state {
  38         struct i2c_adapter* i2c;
  39         /* configuration settings */
  40         const struct tda8083_config* config;
  41         struct dvb_frontend frontend;
  42 };
  43
  44 static int debug;
  45 #define dprintk(args...) \
  46         do { \
  47                 if (debug) printk(KERN_DEBUG "tda8083: " args); \
  48         } while (0)
  49
  50
  51 static u8 tda8083_init_tab [] = {
  52         0x04, 0x00, 0x4a, 0x79, 0x04, 0x00, 0xff, 0xea,
  53         0x48, 0x42, 0x79, 0x60, 0x70, 0x52, 0x9a, 0x10,
  54         0x0e, 0x10, 0xf2, 0xa7, 0x93, 0x0b, 0x05, 0xc8,
  55         0x9d, 0x00, 0x42, 0x80, 0x00, 0x60, 0x40, 0x00,
  56         0x00, 0x75, 0x00, 0xe0, 0x00, 0x00, 0x00, 0x00,
  57         0x00, 0x00, 0x00, 0x00
  58 };
  59
  60
  61 static int tda8083_writereg (struct tda8083_state* state, u8 reg, u8 data)
  62 {
  63         int ret;
  64         u8 buf [] = { reg, data };
  65         struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 };
  66
  67         ret = i2c_transfer(state->i2c, &msg, 1);
  68
  69         if (ret != 1)
  70                 dprintk ("%s: writereg error (reg %02x, ret == %i)\n",
  71                         __func__, reg, ret);
  72
  73         return (ret != 1) ? -1 : 0;
  74 }
  75
  76 static int tda8083_readregs (struct tda8083_state* state, u8 reg1, u8 *b, u8 len)
  77 {
  78         int ret;
  79         struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = &reg1, .len = 1 },
  80                            { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b, .len = len } };
  81
  82         ret = i2c_transfer(state->i2c, msg, 2);
  83
  84         if (ret != 2)
  85                 dprintk ("%s: readreg error (reg %02x, ret == %i)\n",
  86                         __func__, reg1, ret);
  87
  88         return ret == 2 ? 0 : -1;
  89 }
  90
  91 static inline u8 tda8083_readreg (struct tda8083_state* state, u8 reg)
  92 {
  93         u8 val;
  94
  95         tda8083_readregs (state, reg, &val, 1);
  96
  97         return val;
  98 }
  99
 100 static int tda8083_set_inversion (struct tda8083_state* state, fe_spectral_inversion_t inversion)
 101 {
 102         if (inversion == INVERSION_AUTO)
 103                 return 0;
 104
 105         return -EINVAL;
 106 }
 107
 108 static int tda8083_set_fec (struct tda8083_state* state, fe_code_rate_t fec)
 109 {
 110         if (fec == FEC_AUTO)
 111                 return tda8083_writereg (state, 0x07, 0xff);
 112
 113         if (fec >= FEC_1_2 && fec <= FEC_8_9)
 114                 return tda8083_writereg (state, 0x07, 1 << (FEC_8_9 - fec));
 115
 116         return -EINVAL;
 117 }
 118
 119 static fe_code_rate_t tda8083_get_fec (struct tda8083_state* state)
 120 {
 121         u8 index;
 122         static fe_code_rate_t fec_tab [] = { FEC_8_9, FEC_1_2, FEC_2_3, FEC_3_4,
 123                                        FEC_4_5, FEC_5_6, FEC_6_7, FEC_7_8 };
 124
 125         index = tda8083_readreg(state, 0x0e) & 0x07;
 126
 127         return fec_tab [index];
 128 }
 129
 130 static int tda8083_set_symbolrate (struct tda8083_state* state, u32 srate)
 131 {
 132         u32 ratio;
 133         u32 tmp;
 134         u8 filter;
 135
 136         if (srate > 32000000)
 137                 srate = 32000000;
 138         if (srate < 500000)
 139                 srate = 500000;
 140
 141         filter = 0;
 142         if (srate < 24000000)
 143                 filter = 2;
 144         if (srate < 16000000)
 145                 filter = 3;
 146
 147         tmp = 31250 << 16;
 148         ratio = tmp / srate;
 149
 150         tmp = (tmp % srate) << 8;
 151         ratio = (ratio << 8) + tmp / srate;
 152
 153         tmp = (tmp % srate) << 8;
 154         ratio = (ratio << 8) + tmp / srate;
 155
 156         dprintk("tda8083: ratio == %08x\n", (unsigned int) ratio);
 157
 158         tda8083_writereg (state, 0x05, filter);
 159         tda8083_writereg (state, 0x02, (ratio >> 16) & 0xff);
 160         tda8083_writereg (state, 0x03, (ratio >>  8) & 0xff);
 161         tda8083_writereg (state, 0x04, (ratio      ) & 0xff);
 162
 163         tda8083_writereg (state, 0x00, 0x3c);
 164         tda8083_writereg (state, 0x00, 0x04);
 165
 166         return 1;
 167 }
 168
 169 static void tda8083_wait_diseqc_fifo (struct tda8083_state* state, int timeout)
 170 {
 171         unsigned long start = jiffies;
 172
 173         while (jiffies - start < timeout &&
 174                !(tda8083_readreg(state, 0x02) & 0x80))
 175         {
 176                 msleep(50);
 177         };
 178 }
 179
 180 static int tda8083_set_tone (struct tda8083_state* state, fe_sec_tone_mode_t tone)
 181 {
 182         tda8083_writereg (state, 0x26, 0xf1);
 183
 184         switch (tone) {
 185         case SEC_TONE_OFF:
 186                 return tda8083_writereg (state, 0x29, 0x00);
 187         case SEC_TONE_ON:
 188                 return tda8083_writereg (state, 0x29, 0x80);
 189         default:
 190                 return -EINVAL;
 191         };
 192 }
 193
 194 static int tda8083_set_voltage (struct tda8083_state* state, fe_sec_voltage_t voltage)
 195 {
 196         switch (voltage) {
 197         case SEC_VOLTAGE_13:
 198                 return tda8083_writereg (state, 0x20, 0x00);
 199         case SEC_VOLTAGE_18:
 200                 return tda8083_writereg (state, 0x20, 0x11);
 201         default:
 202                 return -EINVAL;
 203         };
 204 }
 205
 206 static int tda8083_send_diseqc_burst (struct tda8083_state* state, fe_sec_mini_cmd_t burst)
 207 {
 208         switch (burst) {
 209         case SEC_MINI_A:
 210                 tda8083_writereg (state, 0x29, (5 << 2));  /* send burst A */
 211                 break;
 212         case SEC_MINI_B:
 213                 tda8083_writereg (state, 0x29, (7 << 2));  /* send B */
 214                 break;
 215         default:
 216                 return -EINVAL;
 217         };
 218
 219         tda8083_wait_diseqc_fifo (state, 100);
 220
 221         return 0;
 222 }
 223
 224 static int tda8083_send_diseqc_msg (struct dvb_frontend* fe,
 225                                     struct dvb_diseqc_master_cmd *m)
 226 {
 227         struct tda8083_state* state = fe->demodulator_priv;
 228         int i;
 229
 230         tda8083_writereg (state, 0x29, (m->msg_len - 3) | (1 << 2)); /* enable */
 231
 232         for (i=0; i<m->msg_len; i++)
 233                 tda8083_writereg (state, 0x23 + i, m->msg[i]);
 234
 235         tda8083_writereg (state, 0x29, (m->msg_len - 3) | (3 << 2)); /* send!! */
 236
 237         tda8083_wait_diseqc_fifo (state, 100);
 238
 239         return 0;
 240 }
 241
 242 static int tda8083_read_status(struct dvb_frontend* fe, fe_status_t* status)
 243 {
 244         struct tda8083_state* state = fe->demodulator_priv;
 245
 246         u8 signal = ~tda8083_readreg (state, 0x01);
 247         u8 sync = tda8083_readreg (state, 0x02);
 248
 249         *status = 0;
 250
 251         if (signal > 10)
 252                 *status |= FE_HAS_SIGNAL;
 253
 254         if (sync & 0x01)
 255                 *status |= FE_HAS_CARRIER;
 256
 257         if (sync & 0x02)
 258                 *status |= FE_HAS_VITERBI;
 259
 260         if (sync & 0x10)
 261                 *status |= FE_HAS_SYNC;
 262
 263         if (sync & 0x20) /* frontend can not lock */
 264                 *status |= FE_TIMEDOUT;
 265
 266         if ((sync & 0x1f) == 0x1f)
 267                 *status |= FE_HAS_LOCK;
 268
 269         return 0;
 270 }
 271
 272 static int tda8083_read_ber(struct dvb_frontend* fe, u32* ber)
 273 {
 274         struct tda8083_state* state = fe->demodulator_priv;
 275         int ret;
 276         u8 buf[3];
 277
 278         if ((ret = tda8083_readregs(state, 0x0b, buf, sizeof(buf))))
 279                 return ret;
 280
 281         *ber = ((buf[0] & 0x1f) << 16) | (buf[1] << 8) | buf[2];
 282
 283         return 0;
 284 }
 285
 286 static int tda8083_read_signal_strength(struct dvb_frontend* fe, u16* strength)
 287 {
 288         struct tda8083_state* state = fe->demodulator_priv;
 289
 290         u8 signal = ~tda8083_readreg (state, 0x01);
 291         *strength = (signal << 8) | signal;
 292
 293         return 0;
 294 }
 295
 296 static int tda8083_read_snr(struct dvb_frontend* fe, u16* snr)
 297 {
 298         struct tda8083_state* state = fe->demodulator_priv;
 299
 300         u8 _snr = tda8083_readreg (state, 0x08);
 301         *snr = (_snr << 8) | _snr;
 302
 303         return 0;
 304 }
 305
 306 static int tda8083_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks)
 307 {
 308         struct tda8083_state* state = fe->demodulator_priv;
 309
 310         *ucblocks = tda8083_readreg(state, 0x0f);
 311         if (*ucblocks == 0xff)
 312                 *ucblocks = 0xffffffff;
 313
 314         return 0;
 315 }
 316
 317 static int tda8083_set_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
 318 {
 319         struct tda8083_state* state = fe->demodulator_priv;
 320
 321         if (fe->ops.tuner_ops.set_params) {
 322                 fe->ops.tuner_ops.set_params(fe, p);
 323                 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0);
 324         }
 325
 326         tda8083_set_inversion (state, p->inversion);
 327         tda8083_set_fec (state, p->u.qpsk.fec_inner);
 328         tda8083_set_symbolrate (state, p->u.qpsk.symbol_rate);
 329
 330         tda8083_writereg (state, 0x00, 0x3c);
 331         tda8083_writereg (state, 0x00, 0x04);
 332
 333         return 0;
 334 }
 335
 336 static int tda8083_get_frontend(struct dvb_frontend* fe, struct dvb_frontend_parameters *p)
 337 {
 338         struct tda8083_state* state = fe->demodulator_priv;
 339
 340         /*p->frequency = ???;*/
 341         p->inversion = (tda8083_readreg (state, 0x0e) & 0x80) ?
 342                         INVERSION_ON : INVERSION_OFF;
 343         p->u.qpsk.fec_inner = tda8083_get_fec (state);
 344         /*p->u.qpsk.symbol_rate = tda8083_get_symbolrate (state);*/
 345
 346         return 0;
 347 }
 348
 349 static int tda8083_sleep(struct dvb_frontend* fe)
 350 {
 351         struct tda8083_state* state = fe->demodulator_priv;
 352
 353         tda8083_writereg (state, 0x00, 0x02);
 354         return 0;
 355 }
 356
 357 static int tda8083_init(struct dvb_frontend* fe)
 358 {
 359         struct tda8083_state* state = fe->demodulator_priv;
 360         int i;
 361
 362         for (i=0; i<44; i++)
 363                 tda8083_writereg (state, i, tda8083_init_tab[i]);
 364
 365         tda8083_writereg (state, 0x00, 0x3c);
 366         tda8083_writereg (state, 0x00, 0x04);
 367
 368         return 0;
 369 }
 370
 371 static int tda8083_diseqc_send_burst(struct dvb_frontend* fe, fe_sec_mini_cmd_t burst)
 372 {
 373         struct tda8083_state* state = fe->demodulator_priv;
 374
 375         tda8083_send_diseqc_burst (state, burst);
 376         tda8083_writereg (state, 0x00, 0x3c);
 377         tda8083_writereg (state, 0x00, 0x04);
 378
 379         return 0;
 380 }
 381
 382 static int tda8083_diseqc_set_tone(struct dvb_frontend* fe, fe_sec_tone_mode_t tone)
 383 {
 384         struct tda8083_state* state = fe->demodulator_priv;
 385
 386         tda8083_set_tone (state, tone);
 387         tda8083_writereg (state, 0x00, 0x3c);
 388         tda8083_writereg (state, 0x00, 0x04);
 389
 390         return 0;
 391 }
 392
 393 static int tda8083_diseqc_set_voltage(struct dvb_frontend* fe, fe_sec_voltage_t voltage)
 394 {
 395         struct tda8083_state* state = fe->demodulator_priv;
 396
 397         tda8083_set_voltage (state, voltage);
 398         tda8083_writereg (state, 0x00, 0x3c);
 399         tda8083_writereg (state, 0x00, 0x04);
 400
 401         return 0;
 402 }
 403
 404 static void tda8083_release(struct dvb_frontend* fe)
 405 {
 406         struct tda8083_state* state = fe->demodulator_priv;
 407         kfree(state);
 408 }
 409
 410 static struct dvb_frontend_ops tda8083_ops;
 411
 412 struct dvb_frontend* tda8083_attach(const struct tda8083_config* config,
 413                                     struct i2c_adapter* i2c)
 414 {
 415         struct tda8083_state* state = NULL;
 416
 417         /* allocate memory for the internal state */
 418         state = kzalloc(sizeof(struct tda8083_state), GFP_KERNEL);
 419         if (state == NULL) goto error;
 420
 421         /* setup the state */
 422         state->config = config;
 423         state->i2c = i2c;
 424
 425         /* check if the demod is there */
 426         if ((tda8083_readreg(state, 0x00)) != 0x05) goto error;
 427
 428         /* create dvb_frontend */
 429         memcpy(&state->frontend.ops, &tda8083_ops, sizeof(struct dvb_frontend_ops));
 430         state->frontend.demodulator_priv = state;
 431         return &state->frontend;
 432
 433 error:
 434         kfree(state);
 435         return NULL;
 436 }
 437
 438 static struct dvb_frontend_ops tda8083_ops = {
 439
 440         .info = {
 441                 .name                   = "Philips TDA8083 DVB-S",
 442                 .type                   = FE_QPSK,
 443                 .frequency_min          = 920000,     /* TDA8060 */
 444                 .frequency_max          = 2200000,    /* TDA8060 */
 445                 .frequency_stepsize     = 125,   /* kHz for QPSK frontends */
 446         /*      .frequency_tolerance    = ???,*/
 447                 .symbol_rate_min        = 12000000,
 448                 .symbol_rate_max        = 30000000,
 449         /*      .symbol_rate_tolerance  = ???,*/
 450                 .caps = FE_CAN_INVERSION_AUTO |
 451                         FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 452                         FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
 453                         FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | FE_CAN_FEC_AUTO |
 454                         FE_CAN_QPSK | FE_CAN_MUTE_TS
 455         },
 456
 457         .release = tda8083_release,
 458
 459         .init = tda8083_init,
 460         .sleep = tda8083_sleep,
 461
 462         .set_frontend = tda8083_set_frontend,
 463         .get_frontend = tda8083_get_frontend,
 464
 465         .read_status = tda8083_read_status,
 466         .read_signal_strength = tda8083_read_signal_strength,
 467         .read_snr = tda8083_read_snr,
 468         .read_ber = tda8083_read_ber,
 469         .read_ucblocks = tda8083_read_ucblocks,
 470
 471         .diseqc_send_master_cmd = tda8083_send_diseqc_msg,
 472         .diseqc_send_burst = tda8083_diseqc_send_burst,
 473         .set_tone = tda8083_diseqc_set_tone,
 474         .set_voltage = tda8083_diseqc_set_voltage,
 475 };
 476
 477 module_param(debug, int, 0644);
 478 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off).");
 479
 480 MODULE_DESCRIPTION("Philips TDA8083 DVB-S Demodulator");
 481 MODULE_AUTHOR("Ralph Metzler, Holger Waechtler");
 482 MODULE_LICENSE("GPL");
 483
 484 EXPORT_SYMBOL(tda8083_attach);