1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 Driver for Philips TDA8083 based QPSK Demodulator 4 5 Copyright (C) 2001 Convergence Integrated Media GmbH 6 7 written by Ralph Metzler <ralph@convergence.de> 8 9 adoption to the new DVB frontend API and diagnostic ioctl's 10 by Holger Waechtler <holger@convergence.de> 11 12 13 */ 14 15 #include <linux/init.h> 16 #include <linux/kernel.h> 17 #include <linux/module.h> 18 #include <linux/string.h> 19 #include <linux/slab.h> 20 #include <linux/jiffies.h> 21 #include <media/dvb_frontend.h> 22 #include "tda8083.h" 23 24 25 struct tda8083_state { 26 struct i2c_adapter* i2c; 27 /* configuration settings */ 28 const struct tda8083_config* config; 29 struct dvb_frontend frontend; 30 }; 31 32 static int debug; 33 #define dprintk(args...) \ 34 do { \ 35 if (debug) printk(KERN_DEBUG "tda8083: " args); \ 36 } while (0) 37 38 39 static u8 tda8083_init_tab [] = { 40 0x04, 0x00, 0x4a, 0x79, 0x04, 0x00, 0xff, 0xea, 41 0x48, 0x42, 0x79, 0x60, 0x70, 0x52, 0x9a, 0x10, 42 0x0e, 0x10, 0xf2, 0xa7, 0x93, 0x0b, 0x05, 0xc8, 43 0x9d, 0x00, 0x42, 0x80, 0x00, 0x60, 0x40, 0x00, 44 0x00, 0x75, 0x00, 0xe0, 0x00, 0x00, 0x00, 0x00, 45 0x00, 0x00, 0x00, 0x00 46 }; 47 48 49 static int tda8083_writereg (struct tda8083_state* state, u8 reg, u8 data) 50 { 51 int ret; 52 u8 buf [] = { reg, data }; 53 struct i2c_msg msg = { .addr = state->config->demod_address, .flags = 0, .buf = buf, .len = 2 }; 54 55 ret = i2c_transfer(state->i2c, &msg, 1); 56 57 if (ret != 1) 58 dprintk ("%s: writereg error (reg %02x, ret == %i)\n", 59 __func__, reg, ret); 60 61 return (ret != 1) ? -1 : 0; 62 } 63 64 static int tda8083_readregs (struct tda8083_state* state, u8 reg1, u8 *b, u8 len) 65 { 66 int ret; 67 struct i2c_msg msg [] = { { .addr = state->config->demod_address, .flags = 0, .buf = ®1, .len = 1 }, 68 { .addr = state->config->demod_address, .flags = I2C_M_RD, .buf = b, .len = len } }; 69 70 ret = i2c_transfer(state->i2c, msg, 2); 71 72 if (ret != 2) 73 dprintk ("%s: readreg error (reg %02x, ret == %i)\n", 74 __func__, reg1, ret); 75 76 return ret == 2 ? 0 : -1; 77 } 78 79 static inline u8 tda8083_readreg (struct tda8083_state* state, u8 reg) 80 { 81 u8 val; 82 83 tda8083_readregs (state, reg, &val, 1); 84 85 return val; 86 } 87 88 static int tda8083_set_inversion(struct tda8083_state *state, 89 enum fe_spectral_inversion inversion) 90 { 91 /* XXX FIXME: implement other modes than FEC_AUTO */ 92 if (inversion == INVERSION_AUTO) 93 return 0; 94 95 return -EINVAL; 96 } 97 98 static int tda8083_set_fec(struct tda8083_state *state, enum fe_code_rate fec) 99 { 100 if (fec == FEC_AUTO) 101 return tda8083_writereg (state, 0x07, 0xff); 102 103 if (fec >= FEC_1_2 && fec <= FEC_8_9) 104 return tda8083_writereg (state, 0x07, 1 << (FEC_8_9 - fec)); 105 106 return -EINVAL; 107 } 108 109 static enum fe_code_rate tda8083_get_fec(struct tda8083_state *state) 110 { 111 u8 index; 112 static enum fe_code_rate fec_tab[] = { 113 FEC_8_9, FEC_1_2, FEC_2_3, FEC_3_4, 114 FEC_4_5, FEC_5_6, FEC_6_7, FEC_7_8 115 }; 116 117 index = tda8083_readreg(state, 0x0e) & 0x07; 118 119 return fec_tab [index]; 120 } 121 122 static int tda8083_set_symbolrate (struct tda8083_state* state, u32 srate) 123 { 124 u32 ratio; 125 u32 tmp; 126 u8 filter; 127 128 if (srate > 32000000) 129 srate = 32000000; 130 if (srate < 500000) 131 srate = 500000; 132 133 filter = 0; 134 if (srate < 24000000) 135 filter = 2; 136 if (srate < 16000000) 137 filter = 3; 138 139 tmp = 31250 << 16; 140 ratio = tmp / srate; 141 142 tmp = (tmp % srate) << 8; 143 ratio = (ratio << 8) + tmp / srate; 144 145 tmp = (tmp % srate) << 8; 146 ratio = (ratio << 8) + tmp / srate; 147 148 dprintk("tda8083: ratio == %08x\n", (unsigned int) ratio); 149 150 tda8083_writereg (state, 0x05, filter); 151 tda8083_writereg (state, 0x02, (ratio >> 16) & 0xff); 152 tda8083_writereg (state, 0x03, (ratio >> 8) & 0xff); 153 tda8083_writereg (state, 0x04, (ratio ) & 0xff); 154 155 tda8083_writereg (state, 0x00, 0x3c); 156 tda8083_writereg (state, 0x00, 0x04); 157 158 return 1; 159 } 160 161 static void tda8083_wait_diseqc_fifo (struct tda8083_state* state, int timeout) 162 { 163 unsigned long start = jiffies; 164 165 while (time_is_after_jiffies(start + timeout) && 166 !(tda8083_readreg(state, 0x02) & 0x80)) 167 { 168 msleep(50); 169 } 170 } 171 172 static int tda8083_set_tone(struct tda8083_state *state, 173 enum fe_sec_tone_mode tone) 174 { 175 tda8083_writereg (state, 0x26, 0xf1); 176 177 switch (tone) { 178 case SEC_TONE_OFF: 179 return tda8083_writereg (state, 0x29, 0x00); 180 case SEC_TONE_ON: 181 return tda8083_writereg (state, 0x29, 0x80); 182 default: 183 return -EINVAL; 184 } 185 } 186 187 static int tda8083_set_voltage(struct tda8083_state *state, 188 enum fe_sec_voltage voltage) 189 { 190 switch (voltage) { 191 case SEC_VOLTAGE_13: 192 return tda8083_writereg (state, 0x20, 0x00); 193 case SEC_VOLTAGE_18: 194 return tda8083_writereg (state, 0x20, 0x11); 195 default: 196 return -EINVAL; 197 } 198 } 199 200 static int tda8083_send_diseqc_burst(struct tda8083_state *state, 201 enum fe_sec_mini_cmd burst) 202 { 203 switch (burst) { 204 case SEC_MINI_A: 205 tda8083_writereg (state, 0x29, (5 << 2)); /* send burst A */ 206 break; 207 case SEC_MINI_B: 208 tda8083_writereg (state, 0x29, (7 << 2)); /* send B */ 209 break; 210 default: 211 return -EINVAL; 212 } 213 214 tda8083_wait_diseqc_fifo (state, 100); 215 216 return 0; 217 } 218 219 static int tda8083_send_diseqc_msg(struct dvb_frontend *fe, 220 struct dvb_diseqc_master_cmd *m) 221 { 222 struct tda8083_state* state = fe->demodulator_priv; 223 int i; 224 225 tda8083_writereg (state, 0x29, (m->msg_len - 3) | (1 << 2)); /* enable */ 226 227 for (i=0; i<m->msg_len; i++) 228 tda8083_writereg (state, 0x23 + i, m->msg[i]); 229 230 tda8083_writereg (state, 0x29, (m->msg_len - 3) | (3 << 2)); /* send!! */ 231 232 tda8083_wait_diseqc_fifo (state, 100); 233 234 return 0; 235 } 236 237 static int tda8083_read_status(struct dvb_frontend *fe, 238 enum fe_status *status) 239 { 240 struct tda8083_state* state = fe->demodulator_priv; 241 242 u8 signal = ~tda8083_readreg (state, 0x01); 243 u8 sync = tda8083_readreg (state, 0x02); 244 245 *status = 0; 246 247 if (signal > 10) 248 *status |= FE_HAS_SIGNAL; 249 250 if (sync & 0x01) 251 *status |= FE_HAS_CARRIER; 252 253 if (sync & 0x02) 254 *status |= FE_HAS_VITERBI; 255 256 if (sync & 0x10) 257 *status |= FE_HAS_SYNC; 258 259 if (sync & 0x20) /* frontend can not lock */ 260 *status |= FE_TIMEDOUT; 261 262 if ((sync & 0x1f) == 0x1f) 263 *status |= FE_HAS_LOCK; 264 265 return 0; 266 } 267 268 static int tda8083_read_ber(struct dvb_frontend* fe, u32* ber) 269 { 270 struct tda8083_state* state = fe->demodulator_priv; 271 int ret; 272 u8 buf[3]; 273 274 if ((ret = tda8083_readregs(state, 0x0b, buf, sizeof(buf)))) 275 return ret; 276 277 *ber = ((buf[0] & 0x1f) << 16) | (buf[1] << 8) | buf[2]; 278 279 return 0; 280 } 281 282 static int tda8083_read_signal_strength(struct dvb_frontend* fe, u16* strength) 283 { 284 struct tda8083_state* state = fe->demodulator_priv; 285 286 u8 signal = ~tda8083_readreg (state, 0x01); 287 *strength = (signal << 8) | signal; 288 289 return 0; 290 } 291 292 static int tda8083_read_snr(struct dvb_frontend* fe, u16* snr) 293 { 294 struct tda8083_state* state = fe->demodulator_priv; 295 296 u8 _snr = tda8083_readreg (state, 0x08); 297 *snr = (_snr << 8) | _snr; 298 299 return 0; 300 } 301 302 static int tda8083_read_ucblocks(struct dvb_frontend* fe, u32* ucblocks) 303 { 304 struct tda8083_state* state = fe->demodulator_priv; 305 306 *ucblocks = tda8083_readreg(state, 0x0f); 307 if (*ucblocks == 0xff) 308 *ucblocks = 0xffffffff; 309 310 return 0; 311 } 312 313 static int tda8083_set_frontend(struct dvb_frontend *fe) 314 { 315 struct dtv_frontend_properties *p = &fe->dtv_property_cache; 316 struct tda8083_state* state = fe->demodulator_priv; 317 318 if (fe->ops.tuner_ops.set_params) { 319 fe->ops.tuner_ops.set_params(fe); 320 if (fe->ops.i2c_gate_ctrl) fe->ops.i2c_gate_ctrl(fe, 0); 321 } 322 323 tda8083_set_inversion (state, p->inversion); 324 tda8083_set_fec(state, p->fec_inner); 325 tda8083_set_symbolrate(state, p->symbol_rate); 326 327 tda8083_writereg (state, 0x00, 0x3c); 328 tda8083_writereg (state, 0x00, 0x04); 329 330 return 0; 331 } 332 333 static int tda8083_get_frontend(struct dvb_frontend *fe, 334 struct dtv_frontend_properties *p) 335 { 336 struct tda8083_state* state = fe->demodulator_priv; 337 338 /* FIXME: get symbolrate & frequency offset...*/ 339 /*p->frequency = ???;*/ 340 p->inversion = (tda8083_readreg (state, 0x0e) & 0x80) ? 341 INVERSION_ON : INVERSION_OFF; 342 p->fec_inner = tda8083_get_fec(state); 343 /*p->symbol_rate = tda8083_get_symbolrate (state);*/ 344 345 return 0; 346 } 347 348 static int tda8083_sleep(struct dvb_frontend* fe) 349 { 350 struct tda8083_state* state = fe->demodulator_priv; 351 352 tda8083_writereg (state, 0x00, 0x02); 353 return 0; 354 } 355 356 static int tda8083_init(struct dvb_frontend* fe) 357 { 358 struct tda8083_state* state = fe->demodulator_priv; 359 int i; 360 361 for (i=0; i<44; i++) 362 tda8083_writereg (state, i, tda8083_init_tab[i]); 363 364 tda8083_writereg (state, 0x00, 0x3c); 365 tda8083_writereg (state, 0x00, 0x04); 366 367 return 0; 368 } 369 370 static int tda8083_diseqc_send_burst(struct dvb_frontend *fe, 371 enum fe_sec_mini_cmd 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, 383 enum fe_sec_tone_mode tone) 384 { 385 struct tda8083_state* state = fe->demodulator_priv; 386 387 tda8083_set_tone (state, tone); 388 tda8083_writereg (state, 0x00, 0x3c); 389 tda8083_writereg (state, 0x00, 0x04); 390 391 return 0; 392 } 393 394 static int tda8083_diseqc_set_voltage(struct dvb_frontend *fe, 395 enum fe_sec_voltage voltage) 396 { 397 struct tda8083_state* state = fe->demodulator_priv; 398 399 tda8083_set_voltage (state, voltage); 400 tda8083_writereg (state, 0x00, 0x3c); 401 tda8083_writereg (state, 0x00, 0x04); 402 403 return 0; 404 } 405 406 static void tda8083_release(struct dvb_frontend* fe) 407 { 408 struct tda8083_state* state = fe->demodulator_priv; 409 kfree(state); 410 } 411 412 static const struct dvb_frontend_ops tda8083_ops; 413 414 struct dvb_frontend* tda8083_attach(const struct tda8083_config* config, 415 struct i2c_adapter* i2c) 416 { 417 struct tda8083_state* state = NULL; 418 419 /* allocate memory for the internal state */ 420 state = kzalloc(sizeof(struct tda8083_state), GFP_KERNEL); 421 if (state == NULL) goto error; 422 423 /* setup the state */ 424 state->config = config; 425 state->i2c = i2c; 426 427 /* check if the demod is there */ 428 if ((tda8083_readreg(state, 0x00)) != 0x05) goto error; 429 430 /* create dvb_frontend */ 431 memcpy(&state->frontend.ops, &tda8083_ops, sizeof(struct dvb_frontend_ops)); 432 state->frontend.demodulator_priv = state; 433 return &state->frontend; 434 435 error: 436 kfree(state); 437 return NULL; 438 } 439 440 static const struct dvb_frontend_ops tda8083_ops = { 441 .delsys = { SYS_DVBS }, 442 .info = { 443 .name = "Philips TDA8083 DVB-S", 444 .frequency_min_hz = 920 * MHz, /* TDA8060 */ 445 .frequency_max_hz = 2200 * MHz, /* TDA8060 */ 446 .frequency_stepsize_hz = 125 * kHz, 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); 485