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 <media/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 = ®1, .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, 101 enum fe_spectral_inversion inversion) 102 { 103 /* XXX FIXME: implement other modes than FEC_AUTO */ 104 if (inversion == INVERSION_AUTO) 105 return 0; 106 107 return -EINVAL; 108 } 109 110 static int tda8083_set_fec(struct tda8083_state *state, enum fe_code_rate fec) 111 { 112 if (fec == FEC_AUTO) 113 return tda8083_writereg (state, 0x07, 0xff); 114 115 if (fec >= FEC_1_2 && fec <= FEC_8_9) 116 return tda8083_writereg (state, 0x07, 1 << (FEC_8_9 - fec)); 117 118 return -EINVAL; 119 } 120 121 static enum fe_code_rate tda8083_get_fec(struct tda8083_state *state) 122 { 123 u8 index; 124 static enum fe_code_rate fec_tab[] = { 125 FEC_8_9, FEC_1_2, FEC_2_3, FEC_3_4, 126 FEC_4_5, FEC_5_6, FEC_6_7, FEC_7_8 127 }; 128 129 index = tda8083_readreg(state, 0x0e) & 0x07; 130 131 return fec_tab [index]; 132 } 133 134 static int tda8083_set_symbolrate (struct tda8083_state* state, u32 srate) 135 { 136 u32 ratio; 137 u32 tmp; 138 u8 filter; 139 140 if (srate > 32000000) 141 srate = 32000000; 142 if (srate < 500000) 143 srate = 500000; 144 145 filter = 0; 146 if (srate < 24000000) 147 filter = 2; 148 if (srate < 16000000) 149 filter = 3; 150 151 tmp = 31250 << 16; 152 ratio = tmp / srate; 153 154 tmp = (tmp % srate) << 8; 155 ratio = (ratio << 8) + tmp / srate; 156 157 tmp = (tmp % srate) << 8; 158 ratio = (ratio << 8) + tmp / srate; 159 160 dprintk("tda8083: ratio == %08x\n", (unsigned int) ratio); 161 162 tda8083_writereg (state, 0x05, filter); 163 tda8083_writereg (state, 0x02, (ratio >> 16) & 0xff); 164 tda8083_writereg (state, 0x03, (ratio >> 8) & 0xff); 165 tda8083_writereg (state, 0x04, (ratio ) & 0xff); 166 167 tda8083_writereg (state, 0x00, 0x3c); 168 tda8083_writereg (state, 0x00, 0x04); 169 170 return 1; 171 } 172 173 static void tda8083_wait_diseqc_fifo (struct tda8083_state* state, int timeout) 174 { 175 unsigned long start = jiffies; 176 177 while (jiffies - start < timeout && 178 !(tda8083_readreg(state, 0x02) & 0x80)) 179 { 180 msleep(50); 181 } 182 } 183 184 static int tda8083_set_tone(struct tda8083_state *state, 185 enum fe_sec_tone_mode tone) 186 { 187 tda8083_writereg (state, 0x26, 0xf1); 188 189 switch (tone) { 190 case SEC_TONE_OFF: 191 return tda8083_writereg (state, 0x29, 0x00); 192 case SEC_TONE_ON: 193 return tda8083_writereg (state, 0x29, 0x80); 194 default: 195 return -EINVAL; 196 } 197 } 198 199 static int tda8083_set_voltage(struct tda8083_state *state, 200 enum fe_sec_voltage voltage) 201 { 202 switch (voltage) { 203 case SEC_VOLTAGE_13: 204 return tda8083_writereg (state, 0x20, 0x00); 205 case SEC_VOLTAGE_18: 206 return tda8083_writereg (state, 0x20, 0x11); 207 default: 208 return -EINVAL; 209 } 210 } 211 212 static int tda8083_send_diseqc_burst(struct tda8083_state *state, 213 enum fe_sec_mini_cmd burst) 214 { 215 switch (burst) { 216 case SEC_MINI_A: 217 tda8083_writereg (state, 0x29, (5 << 2)); /* send burst A */ 218 break; 219 case SEC_MINI_B: 220 tda8083_writereg (state, 0x29, (7 << 2)); /* send B */ 221 break; 222 default: 223 return -EINVAL; 224 } 225 226 tda8083_wait_diseqc_fifo (state, 100); 227 228 return 0; 229 } 230 231 static int tda8083_send_diseqc_msg(struct dvb_frontend *fe, 232 struct dvb_diseqc_master_cmd *m) 233 { 234 struct tda8083_state* state = fe->demodulator_priv; 235 int i; 236 237 tda8083_writereg (state, 0x29, (m->msg_len - 3) | (1 << 2)); /* enable */ 238 239 for (i=0; i<m->msg_len; i++) 240 tda8083_writereg (state, 0x23 + i, m->msg[i]); 241 242 tda8083_writereg (state, 0x29, (m->msg_len - 3) | (3 << 2)); /* send!! */ 243 244 tda8083_wait_diseqc_fifo (state, 100); 245 246 return 0; 247 } 248 249 static int tda8083_read_status(struct dvb_frontend *fe, 250 enum fe_status *status) 251 { 252 struct tda8083_state* state = fe->demodulator_priv; 253 254 u8 signal = ~tda8083_readreg (state, 0x01); 255 u8 sync = tda8083_readreg (state, 0x02); 256 257 *status = 0; 258 259 if (signal > 10) 260 *status |= FE_HAS_SIGNAL; 261 262 if (sync & 0x01) 263 *status |= FE_HAS_CARRIER; 264 265 if (sync & 0x02) 266 *status |= FE_HAS_VITERBI; 267 268 if (sync & 0x10) 269 *status |= FE_HAS_SYNC; 270 271 if (sync & 0x20) /* frontend can not lock */ 272 *status |= FE_TIMEDOUT; 273 274 if ((sync & 0x1f) == 0x1f) 275 *status |= FE_HAS_LOCK; 276 277 return 0; 278 } 279 280 static int tda8083_read_ber(struct dvb_frontend* fe, u32* ber) 281 { 282 struct tda8083_state* state = fe->demodulator_priv; 283 int ret; 284 u8 buf[3]; 285 286 if ((ret = tda8083_readregs(state, 0x0b, buf, sizeof(buf)))) 287 return ret; 288 289 *ber = ((buf[0] & 0x1f) << 16) | (buf[1] << 8) | buf[2]; 290 291 return 0; 292 } 293 294 static int tda8083_read_signal_strength(struct dvb_frontend* fe, u16* strength) 295 { 296 struct tda8083_state* state = fe->demodulator_priv; 297 298 u8 signal = ~tda8083_readreg (state, 0x01); 299 *strength = (signal << 8) | signal; 300 301 return 0; 302 } 303 304 static int tda8083_read_snr(struct dvb_frontend* fe, u16* snr) 305 { 306 struct tda8083_state* state = fe->demodulator_priv; 307 308 u8 _snr = tda8083_readreg (state, 0x08); 309 *snr = (_snr << 8) | _snr; 310 311 return 0; 312 } 313 314 static int tda8083_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks) 315 { 316 struct tda8083_state* state = fe->demodulator_priv; 317 318 *ucblocks = tda8083_readreg(state, 0x0f); 319 if (*ucblocks == 0xff) 320 *ucblocks = 0xffffffff; 321 322 return 0; 323 } 324 325 static int tda8083_set_frontend(struct dvb_frontend *fe) 326 { 327 struct dtv_frontend_properties *p = &fe->dtv_property_cache; 328 struct tda8083_state* state = fe->demodulator_priv; 329 330 if (fe->ops.tuner_ops.set_params) { 331 fe->ops.tuner_ops.set_params(fe); 332 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); 333 } 334 335 tda8083_set_inversion (state, p->inversion); 336 tda8083_set_fec(state, p->fec_inner); 337 tda8083_set_symbolrate(state, p->symbol_rate); 338 339 tda8083_writereg (state, 0x00, 0x3c); 340 tda8083_writereg (state, 0x00, 0x04); 341 342 return 0; 343 } 344 345 static int tda8083_get_frontend(struct dvb_frontend *fe, 346 struct dtv_frontend_properties *p) 347 { 348 struct tda8083_state* state = fe->demodulator_priv; 349 350 /* FIXME: get symbolrate & frequency offset...*/ 351 /*p->frequency = ???;*/ 352 p->inversion = (tda8083_readreg (state, 0x0e) & 0x80) ? 353 INVERSION_ON : INVERSION_OFF; 354 p->fec_inner = tda8083_get_fec(state); 355 /*p->symbol_rate = tda8083_get_symbolrate (state);*/ 356 357 return 0; 358 } 359 360 static int tda8083_sleep(struct dvb_frontend* fe) 361 { 362 struct tda8083_state* state = fe->demodulator_priv; 363 364 tda8083_writereg (state, 0x00, 0x02); 365 return 0; 366 } 367 368 static int tda8083_init(struct dvb_frontend* fe) 369 { 370 struct tda8083_state* state = fe->demodulator_priv; 371 int i; 372 373 for (i=0; i<44; i++) 374 tda8083_writereg (state, i, tda8083_init_tab[i]); 375 376 tda8083_writereg (state, 0x00, 0x3c); 377 tda8083_writereg (state, 0x00, 0x04); 378 379 return 0; 380 } 381 382 static int tda8083_diseqc_send_burst(struct dvb_frontend *fe, 383 enum fe_sec_mini_cmd burst) 384 { 385 struct tda8083_state* state = fe->demodulator_priv; 386 387 tda8083_send_diseqc_burst (state, burst); 388 tda8083_writereg (state, 0x00, 0x3c); 389 tda8083_writereg (state, 0x00, 0x04); 390 391 return 0; 392 } 393 394 static int tda8083_diseqc_set_tone(struct dvb_frontend *fe, 395 enum fe_sec_tone_mode tone) 396 { 397 struct tda8083_state* state = fe->demodulator_priv; 398 399 tda8083_set_tone (state, tone); 400 tda8083_writereg (state, 0x00, 0x3c); 401 tda8083_writereg (state, 0x00, 0x04); 402 403 return 0; 404 } 405 406 static int tda8083_diseqc_set_voltage(struct dvb_frontend *fe, 407 enum fe_sec_voltage voltage) 408 { 409 struct tda8083_state* state = fe->demodulator_priv; 410 411 tda8083_set_voltage (state, voltage); 412 tda8083_writereg (state, 0x00, 0x3c); 413 tda8083_writereg (state, 0x00, 0x04); 414 415 return 0; 416 } 417 418 static void tda8083_release(struct dvb_frontend* fe) 419 { 420 struct tda8083_state* state = fe->demodulator_priv; 421 kfree(state); 422 } 423 424 static const struct dvb_frontend_ops tda8083_ops; 425 426 struct dvb_frontend* tda8083_attach(const struct tda8083_config* config, 427 struct i2c_adapter* i2c) 428 { 429 struct tda8083_state* state = NULL; 430 431 /* allocate memory for the internal state */ 432 state = kzalloc(sizeof(struct tda8083_state), GFP_KERNEL); 433 if (state == NULL) goto error; 434 435 /* setup the state */ 436 state->config = config; 437 state->i2c = i2c; 438 439 /* check if the demod is there */ 440 if ((tda8083_readreg(state, 0x00)) != 0x05) goto error; 441 442 /* create dvb_frontend */ 443 memcpy(&state->frontend.ops, &tda8083_ops, sizeof(struct dvb_frontend_ops)); 444 state->frontend.demodulator_priv = state; 445 return &state->frontend; 446 447 error: 448 kfree(state); 449 return NULL; 450 } 451 452 static const struct dvb_frontend_ops tda8083_ops = { 453 .delsys = { SYS_DVBS }, 454 .info = { 455 .name = "Philips TDA8083 DVB-S", 456 .frequency_min_hz = 920 * MHz, /* TDA8060 */ 457 .frequency_max_hz = 2200 * MHz, /* TDA8060 */ 458 .frequency_stepsize_hz = 125 * kHz, 459 .symbol_rate_min = 12000000, 460 .symbol_rate_max = 30000000, 461 /* .symbol_rate_tolerance = ???,*/ 462 .caps = FE_CAN_INVERSION_AUTO | 463 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 | 464 FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 | 465 FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | FE_CAN_FEC_AUTO | 466 FE_CAN_QPSK | FE_CAN_MUTE_TS 467 }, 468 469 .release = tda8083_release, 470 471 .init = tda8083_init, 472 .sleep = tda8083_sleep, 473 474 .set_frontend = tda8083_set_frontend, 475 .get_frontend = tda8083_get_frontend, 476 477 .read_status = tda8083_read_status, 478 .read_signal_strength = tda8083_read_signal_strength, 479 .read_snr = tda8083_read_snr, 480 .read_ber = tda8083_read_ber, 481 .read_ucblocks = tda8083_read_ucblocks, 482 483 .diseqc_send_master_cmd = tda8083_send_diseqc_msg, 484 .diseqc_send_burst = tda8083_diseqc_send_burst, 485 .set_tone = tda8083_diseqc_set_tone, 486 .set_voltage = tda8083_diseqc_set_voltage, 487 }; 488 489 module_param(debug, int, 0644); 490 MODULE_PARM_DESC(debug, "Turn on/off frontend debugging (default:off)."); 491 492 MODULE_DESCRIPTION("Philips TDA8083 DVB-S Demodulator"); 493 MODULE_AUTHOR("Ralph Metzler, Holger Waechtler"); 494 MODULE_LICENSE("GPL"); 495 496 EXPORT_SYMBOL(tda8083_attach); 497