1 /* 2 * dvb_frontend.h 3 * 4 * The Digital TV Frontend kABI defines a driver-internal interface for 5 * registering low-level, hardware specific driver to a hardware independent 6 * frontend layer. 7 * 8 * Copyright (C) 2001 convergence integrated media GmbH 9 * Copyright (C) 2004 convergence GmbH 10 * 11 * Written by Ralph Metzler 12 * Overhauled by Holger Waechtler 13 * Kernel I2C stuff by Michael Hunold <hunold@convergence.de> 14 * 15 * This program is free software; you can redistribute it and/or 16 * modify it under the terms of the GNU Lesser General Public License 17 * as published by the Free Software Foundation; either version 2.1 18 * of the License, or (at your option) any later version. 19 * 20 * This program is distributed in the hope that it will be useful, 21 * but WITHOUT ANY WARRANTY; without even the implied warranty of 22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 23 * GNU General Public License for more details. 24 * 25 26 * You should have received a copy of the GNU Lesser General Public License 27 * along with this program; if not, write to the Free Software 28 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 29 * 30 */ 31 32 #ifndef _DVB_FRONTEND_H_ 33 #define _DVB_FRONTEND_H_ 34 35 #include <linux/types.h> 36 #include <linux/sched.h> 37 #include <linux/ioctl.h> 38 #include <linux/i2c.h> 39 #include <linux/module.h> 40 #include <linux/errno.h> 41 #include <linux/delay.h> 42 #include <linux/mutex.h> 43 #include <linux/slab.h> 44 45 #include <linux/dvb/frontend.h> 46 47 #include "dvbdev.h" 48 49 /* 50 * Maximum number of Delivery systems per frontend. It 51 * should be smaller or equal to 32 52 */ 53 #define MAX_DELSYS 8 54 55 /** 56 * struct dvb_frontend_tune_settings - parameters to adjust frontend tuning 57 * 58 * @min_delay_ms: minimum delay for tuning, in ms 59 * @step_size: step size between two consecutive frequencies 60 * @max_drift: maximum drift 61 * 62 * NOTE: step_size is in Hz, for terrestrial/cable or kHz for satellite 63 */ 64 struct dvb_frontend_tune_settings { 65 int min_delay_ms; 66 int step_size; 67 int max_drift; 68 }; 69 70 struct dvb_frontend; 71 72 /** 73 * struct dvb_tuner_info - Frontend name and min/max ranges/bandwidths 74 * 75 * @name: name of the Frontend 76 * @frequency_min: minimal frequency supported 77 * @frequency_max: maximum frequency supported 78 * @frequency_step: frequency step 79 * @bandwidth_min: minimal frontend bandwidth supported 80 * @bandwidth_max: maximum frontend bandwidth supported 81 * @bandwidth_step: frontend bandwidth step 82 * 83 * NOTE: frequency parameters are in Hz, for terrestrial/cable or kHz for 84 * satellite. 85 */ 86 struct dvb_tuner_info { 87 char name[128]; 88 89 u32 frequency_min; 90 u32 frequency_max; 91 u32 frequency_step; 92 93 u32 bandwidth_min; 94 u32 bandwidth_max; 95 u32 bandwidth_step; 96 }; 97 98 /** 99 * struct analog_parameters - Parameters to tune into an analog/radio channel 100 * 101 * @frequency: Frequency used by analog TV tuner (either in 62.5 kHz step, 102 * for TV, or 62.5 Hz for radio) 103 * @mode: Tuner mode, as defined on enum v4l2_tuner_type 104 * @audmode: Audio mode as defined for the rxsubchans field at videodev2.h, 105 * e. g. V4L2_TUNER_MODE_* 106 * @std: TV standard bitmap as defined at videodev2.h, e. g. V4L2_STD_* 107 * 108 * Hybrid tuners should be supported by both V4L2 and DVB APIs. This 109 * struct contains the data that are used by the V4L2 side. To avoid 110 * dependencies from V4L2 headers, all enums here are declared as integers. 111 */ 112 struct analog_parameters { 113 unsigned int frequency; 114 unsigned int mode; 115 unsigned int audmode; 116 u64 std; 117 }; 118 119 /** 120 * enum dvbfe_algo - defines the algorithm used to tune into a channel 121 * 122 * @DVBFE_ALGO_HW: Hardware Algorithm - 123 * Devices that support this algorithm do everything in hardware 124 * and no software support is needed to handle them. 125 * Requesting these devices to LOCK is the only thing required, 126 * device is supposed to do everything in the hardware. 127 * 128 * @DVBFE_ALGO_SW: Software Algorithm - 129 * These are dumb devices, that require software to do everything 130 * 131 * @DVBFE_ALGO_CUSTOM: Customizable Agorithm - 132 * Devices having this algorithm can be customized to have specific 133 * algorithms in the frontend driver, rather than simply doing a 134 * software zig-zag. In this case the zigzag maybe hardware assisted 135 * or it maybe completely done in hardware. In all cases, usage of 136 * this algorithm, in conjunction with the search and track 137 * callbacks, utilizes the driver specific algorithm. 138 * 139 * @DVBFE_ALGO_RECOVERY: Recovery Algorithm - 140 * These devices have AUTO recovery capabilities from LOCK failure 141 */ 142 enum dvbfe_algo { 143 DVBFE_ALGO_HW = (1 << 0), 144 DVBFE_ALGO_SW = (1 << 1), 145 DVBFE_ALGO_CUSTOM = (1 << 2), 146 DVBFE_ALGO_RECOVERY = (1 << 31) 147 }; 148 149 /** 150 * enum dvbfe_search - search callback possible return status 151 * 152 * @DVBFE_ALGO_SEARCH_SUCCESS: 153 * The frontend search algorithm completed and returned successfully 154 * 155 * @DVBFE_ALGO_SEARCH_ASLEEP: 156 * The frontend search algorithm is sleeping 157 * 158 * @DVBFE_ALGO_SEARCH_FAILED: 159 * The frontend search for a signal failed 160 * 161 * @DVBFE_ALGO_SEARCH_INVALID: 162 * The frontend search algorith was probably supplied with invalid 163 * parameters and the search is an invalid one 164 * 165 * @DVBFE_ALGO_SEARCH_ERROR: 166 * The frontend search algorithm failed due to some error 167 * 168 * @DVBFE_ALGO_SEARCH_AGAIN: 169 * The frontend search algorithm was requested to search again 170 */ 171 enum dvbfe_search { 172 DVBFE_ALGO_SEARCH_SUCCESS = (1 << 0), 173 DVBFE_ALGO_SEARCH_ASLEEP = (1 << 1), 174 DVBFE_ALGO_SEARCH_FAILED = (1 << 2), 175 DVBFE_ALGO_SEARCH_INVALID = (1 << 3), 176 DVBFE_ALGO_SEARCH_AGAIN = (1 << 4), 177 DVBFE_ALGO_SEARCH_ERROR = (1 << 31), 178 }; 179 180 /** 181 * struct dvb_tuner_ops - Tuner information and callbacks 182 * 183 * @info: embedded struct dvb_tuner_info with tuner properties 184 * @release: callback function called when frontend is dettached. 185 * drivers should free any allocated memory. 186 * @init: callback function used to initialize the tuner device. 187 * @sleep: callback function used to put the tuner to sleep. 188 * @suspend: callback function used to inform that the Kernel will 189 * suspend. 190 * @resume: callback function used to inform that the Kernel is 191 * resuming from suspend. 192 * @set_params: callback function used to inform the tuner to tune 193 * into a digital TV channel. The properties to be used 194 * are stored at @dvb_frontend.dtv_property_cache;. The 195 * tuner demod can change the parameters to reflect the 196 * changes needed for the channel to be tuned, and 197 * update statistics. This is the recommended way to set 198 * the tuner parameters and should be used on newer 199 * drivers. 200 * @set_analog_params: callback function used to tune into an analog TV 201 * channel on hybrid tuners. It passes @analog_parameters; 202 * to the driver. 203 * @set_config: callback function used to send some tuner-specific 204 * parameters. 205 * @get_frequency: get the actual tuned frequency 206 * @get_bandwidth: get the bandwitdh used by the low pass filters 207 * @get_if_frequency: get the Intermediate Frequency, in Hz. For baseband, 208 * should return 0. 209 * @get_status: returns the frontend lock status 210 * @get_rf_strength: returns the RF signal strengh. Used mostly to support 211 * analog TV and radio. Digital TV should report, instead, 212 * via DVBv5 API (@dvb_frontend.dtv_property_cache;). 213 * @get_afc: Used only by analog TV core. Reports the frequency 214 * drift due to AFC. 215 * @calc_regs: callback function used to pass register data settings 216 * for simple tuners. Shouldn't be used on newer drivers. 217 * @set_frequency: Set a new frequency. Shouldn't be used on newer drivers. 218 * @set_bandwidth: Set a new frequency. Shouldn't be used on newer drivers. 219 * 220 * NOTE: frequencies used on get_frequency and set_frequency are in Hz for 221 * terrestrial/cable or kHz for satellite. 222 * 223 */ 224 struct dvb_tuner_ops { 225 226 struct dvb_tuner_info info; 227 228 void (*release)(struct dvb_frontend *fe); 229 int (*init)(struct dvb_frontend *fe); 230 int (*sleep)(struct dvb_frontend *fe); 231 int (*suspend)(struct dvb_frontend *fe); 232 int (*resume)(struct dvb_frontend *fe); 233 234 /* This is the recomended way to set the tuner */ 235 int (*set_params)(struct dvb_frontend *fe); 236 int (*set_analog_params)(struct dvb_frontend *fe, struct analog_parameters *p); 237 238 int (*set_config)(struct dvb_frontend *fe, void *priv_cfg); 239 240 int (*get_frequency)(struct dvb_frontend *fe, u32 *frequency); 241 int (*get_bandwidth)(struct dvb_frontend *fe, u32 *bandwidth); 242 int (*get_if_frequency)(struct dvb_frontend *fe, u32 *frequency); 243 244 #define TUNER_STATUS_LOCKED 1 245 #define TUNER_STATUS_STEREO 2 246 int (*get_status)(struct dvb_frontend *fe, u32 *status); 247 int (*get_rf_strength)(struct dvb_frontend *fe, u16 *strength); 248 int (*get_afc)(struct dvb_frontend *fe, s32 *afc); 249 250 /* 251 * This is support for demods like the mt352 - fills out the supplied 252 * buffer with what to write. 253 * 254 * Don't use on newer drivers. 255 */ 256 int (*calc_regs)(struct dvb_frontend *fe, u8 *buf, int buf_len); 257 258 /* 259 * These are provided separately from set_params in order to 260 * facilitate silicon tuners which require sophisticated tuning loops, 261 * controlling each parameter separately. 262 * 263 * Don't use on newer drivers. 264 */ 265 int (*set_frequency)(struct dvb_frontend *fe, u32 frequency); 266 int (*set_bandwidth)(struct dvb_frontend *fe, u32 bandwidth); 267 }; 268 269 /** 270 * struct analog_demod_info - Information struct for analog TV part of the demod 271 * 272 * @name: Name of the analog TV demodulator 273 */ 274 struct analog_demod_info { 275 char *name; 276 }; 277 278 /** 279 * struct analog_demod_ops - Demodulation information and callbacks for 280 * analog TV and radio 281 * 282 * @info: pointer to struct analog_demod_info 283 * @set_params: callback function used to inform the demod to set the 284 * demodulator parameters needed to decode an analog or 285 * radio channel. The properties are passed via 286 * struct @analog_params;. 287 * @has_signal: returns 0xffff if has signal, or 0 if it doesn't. 288 * @get_afc: Used only by analog TV core. Reports the frequency 289 * drift due to AFC. 290 * @tuner_status: callback function that returns tuner status bits, e. g. 291 * TUNER_STATUS_LOCKED and TUNER_STATUS_STEREO. 292 * @standby: set the tuner to standby mode. 293 * @release: callback function called when frontend is dettached. 294 * drivers should free any allocated memory. 295 * @i2c_gate_ctrl: controls the I2C gate. Newer drivers should use I2C 296 * mux support instead. 297 * @set_config: callback function used to send some tuner-specific 298 * parameters. 299 */ 300 struct analog_demod_ops { 301 302 struct analog_demod_info info; 303 304 void (*set_params)(struct dvb_frontend *fe, 305 struct analog_parameters *params); 306 int (*has_signal)(struct dvb_frontend *fe, u16 *signal); 307 int (*get_afc)(struct dvb_frontend *fe, s32 *afc); 308 void (*tuner_status)(struct dvb_frontend *fe); 309 void (*standby)(struct dvb_frontend *fe); 310 void (*release)(struct dvb_frontend *fe); 311 int (*i2c_gate_ctrl)(struct dvb_frontend *fe, int enable); 312 313 /** This is to allow setting tuner-specific configuration */ 314 int (*set_config)(struct dvb_frontend *fe, void *priv_cfg); 315 }; 316 317 struct dtv_frontend_properties; 318 319 320 /** 321 * struct dvb_frontend_ops - Demodulation information and callbacks for 322 * ditialt TV 323 * 324 * @info: embedded struct dvb_tuner_info with tuner properties 325 * @delsys: Delivery systems supported by the frontend 326 * @detach: callback function called when frontend is detached. 327 * drivers should clean up, but not yet free the struct 328 * dvb_frontend allocation. 329 * @release: callback function called when frontend is ready to be 330 * freed. 331 * drivers should free any allocated memory. 332 * @release_sec: callback function requesting that the Satelite Equipment 333 * Control (SEC) driver to release and free any memory 334 * allocated by the driver. 335 * @init: callback function used to initialize the tuner device. 336 * @sleep: callback function used to put the tuner to sleep. 337 * @write: callback function used by some demod legacy drivers to 338 * allow other drivers to write data into their registers. 339 * Should not be used on new drivers. 340 * @tune: callback function used by demod drivers that use 341 * @DVBFE_ALGO_HW; to tune into a frequency. 342 * @get_frontend_algo: returns the desired hardware algorithm. 343 * @set_frontend: callback function used to inform the demod to set the 344 * parameters for demodulating a digital TV channel. 345 * The properties to be used are stored at 346 * @dvb_frontend.dtv_property_cache;. The demod can change 347 * the parameters to reflect the changes needed for the 348 * channel to be decoded, and update statistics. 349 * @get_tune_settings: callback function 350 * @get_frontend: callback function used to inform the parameters 351 * actuall in use. The properties to be used are stored at 352 * @dvb_frontend.dtv_property_cache; and update 353 * statistics. Please notice that it should not return 354 * an error code if the statistics are not available 355 * because the demog is not locked. 356 * @read_status: returns the locking status of the frontend. 357 * @read_ber: legacy callback function to return the bit error rate. 358 * Newer drivers should provide such info via DVBv5 API, 359 * e. g. @set_frontend;/@get_frontend;, implementing this 360 * callback only if DVBv3 API compatibility is wanted. 361 * @read_signal_strength: legacy callback function to return the signal 362 * strength. Newer drivers should provide such info via 363 * DVBv5 API, e. g. @set_frontend;/@get_frontend;, 364 * implementing this callback only if DVBv3 API 365 * compatibility is wanted. 366 * @read_snr: legacy callback function to return the Signal/Noise 367 * rate. Newer drivers should provide such info via 368 * DVBv5 API, e. g. @set_frontend;/@get_frontend;, 369 * implementing this callback only if DVBv3 API 370 * compatibility is wanted. 371 * @read_ucblocks: legacy callback function to return the Uncorrected Error 372 * Blocks. Newer drivers should provide such info via 373 * DVBv5 API, e. g. @set_frontend;/@get_frontend;, 374 * implementing this callback only if DVBv3 API 375 * compatibility is wanted. 376 * @diseqc_reset_overload: callback function to implement the 377 * FE_DISEQC_RESET_OVERLOAD ioctl (only Satellite) 378 * @diseqc_send_master_cmd: callback function to implement the 379 * FE_DISEQC_SEND_MASTER_CMD ioctl (only Satellite). 380 * @diseqc_recv_slave_reply: callback function to implement the 381 * FE_DISEQC_RECV_SLAVE_REPLY ioctl (only Satellite) 382 * @diseqc_send_burst: callback function to implement the 383 * FE_DISEQC_SEND_BURST ioctl (only Satellite). 384 * @set_tone: callback function to implement the 385 * FE_SET_TONE ioctl (only Satellite). 386 * @set_voltage: callback function to implement the 387 * FE_SET_VOLTAGE ioctl (only Satellite). 388 * @enable_high_lnb_voltage: callback function to implement the 389 * FE_ENABLE_HIGH_LNB_VOLTAGE ioctl (only Satellite). 390 * @dishnetwork_send_legacy_command: callback function to implement the 391 * FE_DISHNETWORK_SEND_LEGACY_CMD ioctl (only Satellite). 392 * Drivers should not use this, except when the DVB 393 * core emulation fails to provide proper support (e.g. 394 * if @set_voltage takes more than 8ms to work), and 395 * when backward compatibility with this legacy API is 396 * required. 397 * @i2c_gate_ctrl: controls the I2C gate. Newer drivers should use I2C 398 * mux support instead. 399 * @ts_bus_ctrl: callback function used to take control of the TS bus. 400 * @set_lna: callback function to power on/off/auto the LNA. 401 * @search: callback function used on some custom algo search algos. 402 * @tuner_ops: pointer to struct dvb_tuner_ops 403 * @analog_ops: pointer to struct analog_demod_ops 404 * @set_property: callback function to allow the frontend to validade 405 * incoming properties. Should not be used on new drivers. 406 * @get_property: callback function to allow the frontend to override 407 * outcoming properties. Should not be used on new drivers. 408 */ 409 struct dvb_frontend_ops { 410 411 struct dvb_frontend_info info; 412 413 u8 delsys[MAX_DELSYS]; 414 415 void (*detach)(struct dvb_frontend *fe); 416 void (*release)(struct dvb_frontend* fe); 417 void (*release_sec)(struct dvb_frontend* fe); 418 419 int (*init)(struct dvb_frontend* fe); 420 int (*sleep)(struct dvb_frontend* fe); 421 422 int (*write)(struct dvb_frontend* fe, const u8 buf[], int len); 423 424 /* if this is set, it overrides the default swzigzag */ 425 int (*tune)(struct dvb_frontend* fe, 426 bool re_tune, 427 unsigned int mode_flags, 428 unsigned int *delay, 429 enum fe_status *status); 430 431 /* get frontend tuning algorithm from the module */ 432 enum dvbfe_algo (*get_frontend_algo)(struct dvb_frontend *fe); 433 434 /* these two are only used for the swzigzag code */ 435 int (*set_frontend)(struct dvb_frontend *fe); 436 int (*get_tune_settings)(struct dvb_frontend* fe, struct dvb_frontend_tune_settings* settings); 437 438 int (*get_frontend)(struct dvb_frontend *fe, 439 struct dtv_frontend_properties *props); 440 441 int (*read_status)(struct dvb_frontend *fe, enum fe_status *status); 442 int (*read_ber)(struct dvb_frontend* fe, u32* ber); 443 int (*read_signal_strength)(struct dvb_frontend* fe, u16* strength); 444 int (*read_snr)(struct dvb_frontend* fe, u16* snr); 445 int (*read_ucblocks)(struct dvb_frontend* fe, u32* ucblocks); 446 447 int (*diseqc_reset_overload)(struct dvb_frontend* fe); 448 int (*diseqc_send_master_cmd)(struct dvb_frontend* fe, struct dvb_diseqc_master_cmd* cmd); 449 int (*diseqc_recv_slave_reply)(struct dvb_frontend* fe, struct dvb_diseqc_slave_reply* reply); 450 int (*diseqc_send_burst)(struct dvb_frontend *fe, 451 enum fe_sec_mini_cmd minicmd); 452 int (*set_tone)(struct dvb_frontend *fe, enum fe_sec_tone_mode tone); 453 int (*set_voltage)(struct dvb_frontend *fe, 454 enum fe_sec_voltage voltage); 455 int (*enable_high_lnb_voltage)(struct dvb_frontend* fe, long arg); 456 int (*dishnetwork_send_legacy_command)(struct dvb_frontend* fe, unsigned long cmd); 457 int (*i2c_gate_ctrl)(struct dvb_frontend* fe, int enable); 458 int (*ts_bus_ctrl)(struct dvb_frontend* fe, int acquire); 459 int (*set_lna)(struct dvb_frontend *); 460 461 /* 462 * These callbacks are for devices that implement their own 463 * tuning algorithms, rather than a simple swzigzag 464 */ 465 enum dvbfe_search (*search)(struct dvb_frontend *fe); 466 467 struct dvb_tuner_ops tuner_ops; 468 struct analog_demod_ops analog_ops; 469 470 int (*set_property)(struct dvb_frontend* fe, struct dtv_property* tvp); 471 int (*get_property)(struct dvb_frontend* fe, struct dtv_property* tvp); 472 }; 473 474 #ifdef __DVB_CORE__ 475 #define MAX_EVENT 8 476 477 /* Used only internally at dvb_frontend.c */ 478 struct dvb_fe_events { 479 struct dvb_frontend_event events[MAX_EVENT]; 480 int eventw; 481 int eventr; 482 int overflow; 483 wait_queue_head_t wait_queue; 484 struct mutex mtx; 485 }; 486 #endif 487 488 /** 489 * struct dtv_frontend_properties - contains a list of properties that are 490 * specific to a digital TV standard. 491 * 492 * @frequency: frequency in Hz for terrestrial/cable or in kHz for 493 * Satellite 494 * @modulation: Frontend modulation type 495 * @voltage: SEC voltage (only Satellite) 496 * @sectone: SEC tone mode (only Satellite) 497 * @inversion: Spectral inversion 498 * @fec_inner: Forward error correction inner Code Rate 499 * @transmission_mode: Transmission Mode 500 * @bandwidth_hz: Bandwidth, in Hz. A zero value means that userspace 501 * wants to autodetect. 502 * @guard_interval: Guard Interval 503 * @hierarchy: Hierarchy 504 * @symbol_rate: Symbol Rate 505 * @code_rate_HP: high priority stream code rate 506 * @code_rate_LP: low priority stream code rate 507 * @pilot: Enable/disable/autodetect pilot tones 508 * @rolloff: Rolloff factor (alpha) 509 * @delivery_system: FE delivery system (e. g. digital TV standard) 510 * @interleaving: interleaving 511 * @isdbt_partial_reception: ISDB-T partial reception (only ISDB standard) 512 * @isdbt_sb_mode: ISDB-T Sound Broadcast (SB) mode (only ISDB standard) 513 * @isdbt_sb_subchannel: ISDB-T SB subchannel (only ISDB standard) 514 * @isdbt_sb_segment_idx: ISDB-T SB segment index (only ISDB standard) 515 * @isdbt_sb_segment_count: ISDB-T SB segment count (only ISDB standard) 516 * @isdbt_layer_enabled: ISDB Layer enabled (only ISDB standard) 517 * @layer: ISDB per-layer data (only ISDB standard) 518 * @layer.segment_count: Segment Count; 519 * @layer.fec: per layer code rate; 520 * @layer.modulation: per layer modulation; 521 * @layer.interleaving: per layer interleaving. 522 * @stream_id: If different than zero, enable substream filtering, if 523 * hardware supports (DVB-S2 and DVB-T2). 524 * @atscmh_fic_ver: Version number of the FIC (Fast Information Channel) 525 * signaling data (only ATSC-M/H) 526 * @atscmh_parade_id: Parade identification number (only ATSC-M/H) 527 * @atscmh_nog: Number of MH groups per MH subframe for a designated 528 * parade (only ATSC-M/H) 529 * @atscmh_tnog: Total number of MH groups including all MH groups 530 * belonging to all MH parades in one MH subframe 531 * (only ATSC-M/H) 532 * @atscmh_sgn: Start group number (only ATSC-M/H) 533 * @atscmh_prc: Parade repetition cycle (only ATSC-M/H) 534 * @atscmh_rs_frame_mode: Reed Solomon (RS) frame mode (only ATSC-M/H) 535 * @atscmh_rs_frame_ensemble: RS frame ensemble (only ATSC-M/H) 536 * @atscmh_rs_code_mode_pri: RS code mode pri (only ATSC-M/H) 537 * @atscmh_rs_code_mode_sec: RS code mode sec (only ATSC-M/H) 538 * @atscmh_sccc_block_mode: Series Concatenated Convolutional Code (SCCC) 539 * Block Mode (only ATSC-M/H) 540 * @atscmh_sccc_code_mode_a: SCCC code mode A (only ATSC-M/H) 541 * @atscmh_sccc_code_mode_b: SCCC code mode B (only ATSC-M/H) 542 * @atscmh_sccc_code_mode_c: SCCC code mode C (only ATSC-M/H) 543 * @atscmh_sccc_code_mode_d: SCCC code mode D (only ATSC-M/H) 544 * @lna: Power ON/OFF/AUTO the Linear Now-noise Amplifier (LNA) 545 * @strength: DVBv5 API statistics: Signal Strength 546 * @cnr: DVBv5 API statistics: Signal to Noise ratio of the 547 * (main) carrier 548 * @pre_bit_error: DVBv5 API statistics: pre-Viterbi bit error count 549 * @pre_bit_count: DVBv5 API statistics: pre-Viterbi bit count 550 * @post_bit_error: DVBv5 API statistics: post-Viterbi bit error count 551 * @post_bit_count: DVBv5 API statistics: post-Viterbi bit count 552 * @block_error: DVBv5 API statistics: block error count 553 * @block_count: DVBv5 API statistics: block count 554 * 555 * NOTE: derivated statistics like Uncorrected Error blocks (UCE) are 556 * calculated on userspace. 557 * 558 * Only a subset of the properties are needed for a given delivery system. 559 * For more info, consult the media_api.html with the documentation of the 560 * Userspace API. 561 */ 562 struct dtv_frontend_properties { 563 u32 frequency; 564 enum fe_modulation modulation; 565 566 enum fe_sec_voltage voltage; 567 enum fe_sec_tone_mode sectone; 568 enum fe_spectral_inversion inversion; 569 enum fe_code_rate fec_inner; 570 enum fe_transmit_mode transmission_mode; 571 u32 bandwidth_hz; /* 0 = AUTO */ 572 enum fe_guard_interval guard_interval; 573 enum fe_hierarchy hierarchy; 574 u32 symbol_rate; 575 enum fe_code_rate code_rate_HP; 576 enum fe_code_rate code_rate_LP; 577 578 enum fe_pilot pilot; 579 enum fe_rolloff rolloff; 580 581 enum fe_delivery_system delivery_system; 582 583 enum fe_interleaving interleaving; 584 585 /* ISDB-T specifics */ 586 u8 isdbt_partial_reception; 587 u8 isdbt_sb_mode; 588 u8 isdbt_sb_subchannel; 589 u32 isdbt_sb_segment_idx; 590 u32 isdbt_sb_segment_count; 591 u8 isdbt_layer_enabled; 592 struct { 593 u8 segment_count; 594 enum fe_code_rate fec; 595 enum fe_modulation modulation; 596 u8 interleaving; 597 } layer[3]; 598 599 /* Multistream specifics */ 600 u32 stream_id; 601 602 /* ATSC-MH specifics */ 603 u8 atscmh_fic_ver; 604 u8 atscmh_parade_id; 605 u8 atscmh_nog; 606 u8 atscmh_tnog; 607 u8 atscmh_sgn; 608 u8 atscmh_prc; 609 610 u8 atscmh_rs_frame_mode; 611 u8 atscmh_rs_frame_ensemble; 612 u8 atscmh_rs_code_mode_pri; 613 u8 atscmh_rs_code_mode_sec; 614 u8 atscmh_sccc_block_mode; 615 u8 atscmh_sccc_code_mode_a; 616 u8 atscmh_sccc_code_mode_b; 617 u8 atscmh_sccc_code_mode_c; 618 u8 atscmh_sccc_code_mode_d; 619 620 u32 lna; 621 622 /* statistics data */ 623 struct dtv_fe_stats strength; 624 struct dtv_fe_stats cnr; 625 struct dtv_fe_stats pre_bit_error; 626 struct dtv_fe_stats pre_bit_count; 627 struct dtv_fe_stats post_bit_error; 628 struct dtv_fe_stats post_bit_count; 629 struct dtv_fe_stats block_error; 630 struct dtv_fe_stats block_count; 631 632 /* private: */ 633 /* Cache State */ 634 u32 state; 635 636 }; 637 638 #define DVB_FE_NO_EXIT 0 639 #define DVB_FE_NORMAL_EXIT 1 640 #define DVB_FE_DEVICE_REMOVED 2 641 #define DVB_FE_DEVICE_RESUME 3 642 643 /** 644 * struct dvb_frontend - Frontend structure to be used on drivers. 645 * 646 * @refcount: refcount to keep track of struct dvb_frontend 647 * references 648 * @ops: embedded struct dvb_frontend_ops 649 * @dvb: pointer to struct dvb_adapter 650 * @demodulator_priv: demod private data 651 * @tuner_priv: tuner private data 652 * @frontend_priv: frontend private data 653 * @sec_priv: SEC private data 654 * @analog_demod_priv: Analog demod private data 655 * @dtv_property_cache: embedded struct dtv_frontend_properties 656 * @callback: callback function used on some drivers to call 657 * either the tuner or the demodulator. 658 * @id: Frontend ID 659 * @exit: Used to inform the DVB core that the frontend 660 * thread should exit (usually, means that the hardware 661 * got disconnected. 662 */ 663 664 struct dvb_frontend { 665 struct kref refcount; 666 struct dvb_frontend_ops ops; 667 struct dvb_adapter *dvb; 668 void *demodulator_priv; 669 void *tuner_priv; 670 void *frontend_priv; 671 void *sec_priv; 672 void *analog_demod_priv; 673 struct dtv_frontend_properties dtv_property_cache; 674 #define DVB_FRONTEND_COMPONENT_TUNER 0 675 #define DVB_FRONTEND_COMPONENT_DEMOD 1 676 int (*callback)(void *adapter_priv, int component, int cmd, int arg); 677 int id; 678 unsigned int exit; 679 }; 680 681 /** 682 * dvb_register_frontend() - Registers a DVB frontend at the adapter 683 * 684 * @dvb: pointer to the dvb adapter 685 * @fe: pointer to the frontend struct 686 * 687 * Allocate and initialize the private data needed by the frontend core to 688 * manage the frontend and calls dvb_register_device() to register a new 689 * frontend. It also cleans the property cache that stores the frontend 690 * parameters and selects the first available delivery system. 691 */ 692 int dvb_register_frontend(struct dvb_adapter *dvb, 693 struct dvb_frontend *fe); 694 695 /** 696 * dvb_unregister_frontend() - Unregisters a DVB frontend 697 * 698 * @fe: pointer to the frontend struct 699 * 700 * Stops the frontend kthread, calls dvb_unregister_device() and frees the 701 * private frontend data allocated by dvb_register_frontend(). 702 * 703 * NOTE: This function doesn't frees the memory allocated by the demod, 704 * by the SEC driver and by the tuner. In order to free it, an explicit call to 705 * dvb_frontend_detach() is needed, after calling this function. 706 */ 707 int dvb_unregister_frontend(struct dvb_frontend *fe); 708 709 /** 710 * dvb_frontend_detach() - Detaches and frees frontend specific data 711 * 712 * @fe: pointer to the frontend struct 713 * 714 * This function should be called after dvb_unregister_frontend(). It 715 * calls the SEC, tuner and demod release functions: 716 * &dvb_frontend_ops.release_sec, &dvb_frontend_ops.tuner_ops.release, 717 * &dvb_frontend_ops.analog_ops.release and &dvb_frontend_ops.release. 718 * 719 * If the driver is compiled with CONFIG_MEDIA_ATTACH, it also decreases 720 * the module reference count, needed to allow userspace to remove the 721 * previously used DVB frontend modules. 722 */ 723 void dvb_frontend_detach(struct dvb_frontend *fe); 724 725 /** 726 * dvb_frontend_suspend() - Suspends a Digital TV frontend 727 * 728 * @fe: pointer to the frontend struct 729 * 730 * This function prepares a Digital TV frontend to suspend. 731 * 732 * In order to prepare the tuner to suspend, if 733 * &dvb_frontend_ops.tuner_ops.suspend\(\) is available, it calls it. Otherwise, 734 * it will call &dvb_frontend_ops.tuner_ops.sleep\(\), if available. 735 * 736 * It will also call &dvb_frontend_ops.sleep\(\) to put the demod to suspend. 737 * 738 * The drivers should also call dvb_frontend_suspend\(\) as part of their 739 * handler for the &device_driver.suspend\(\). 740 */ 741 int dvb_frontend_suspend(struct dvb_frontend *fe); 742 743 /** 744 * dvb_frontend_resume() - Resumes a Digital TV frontend 745 * 746 * @fe: pointer to the frontend struct 747 * 748 * This function resumes the usual operation of the tuner after resume. 749 * 750 * In order to resume the frontend, it calls the demod &dvb_frontend_ops.init\(\). 751 * 752 * If &dvb_frontend_ops.tuner_ops.resume\(\) is available, It, it calls it. 753 * Otherwise,t will call &dvb_frontend_ops.tuner_ops.init\(\), if available. 754 * 755 * Once tuner and demods are resumed, it will enforce that the SEC voltage and 756 * tone are restored to their previous values and wake up the frontend's 757 * kthread in order to retune the frontend. 758 * 759 * The drivers should also call dvb_frontend_resume() as part of their 760 * handler for the &device_driver.resume\(\). 761 */ 762 int dvb_frontend_resume(struct dvb_frontend *fe); 763 764 /** 765 * dvb_frontend_reinitialise() - forces a reinitialisation at the frontend 766 * 767 * @fe: pointer to the frontend struct 768 * 769 * Calls &dvb_frontend_ops.init\(\) and &dvb_frontend_ops.tuner_ops.init\(\), 770 * and resets SEC tone and voltage (for Satellite systems). 771 * 772 * NOTE: Currently, this function is used only by one driver (budget-av). 773 * It seems to be due to address some special issue with that specific 774 * frontend. 775 */ 776 void dvb_frontend_reinitialise(struct dvb_frontend *fe); 777 778 /** 779 * dvb_frontend_sleep_until() - Sleep for the amount of time given by 780 * add_usec parameter 781 * 782 * @waketime: pointer to a struct ktime_t 783 * @add_usec: time to sleep, in microseconds 784 * 785 * This function is used to measure the time required for the 786 * %FE_DISHNETWORK_SEND_LEGACY_CMD ioctl to work. It needs to be as precise 787 * as possible, as it affects the detection of the dish tone command at the 788 * satellite subsystem. 789 * 790 * Its used internally by the DVB frontend core, in order to emulate 791 * %FE_DISHNETWORK_SEND_LEGACY_CMD using the &dvb_frontend_ops.set_voltage\(\) 792 * callback. 793 * 794 * NOTE: it should not be used at the drivers, as the emulation for the 795 * legacy callback is provided by the Kernel. The only situation where this 796 * should be at the drivers is when there are some bugs at the hardware that 797 * would prevent the core emulation to work. On such cases, the driver would 798 * be writing a &dvb_frontend_ops.dishnetwork_send_legacy_command\(\) and 799 * calling this function directly. 800 */ 801 void dvb_frontend_sleep_until(ktime_t *waketime, u32 add_usec); 802 803 #endif 804