drivers/media/dvb-core/dvb_frontend.h

   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  * @ops:                embedded struct dvb_frontend_ops
 647  * @dvb:                pointer to struct dvb_adapter
 648  * @demodulator_priv:   demod private data
 649  * @tuner_priv:         tuner private data
 650  * @frontend_priv:      frontend private data
 651  * @sec_priv:           SEC private data
 652  * @analog_demod_priv:  Analog demod private data
 653  * @dtv_property_cache: embedded struct dtv_frontend_properties
 654  * @callback:           callback function used on some drivers to call
 655  *                      either the tuner or the demodulator.
 656  * @id:                 Frontend ID
 657  * @exit:               Used to inform the DVB core that the frontend
 658  *                      thread should exit (usually, means that the hardware
 659  *                      got disconnected.
 660  */
 661
 662 struct dvb_frontend {
 663         struct kref refcount;
 664         struct dvb_frontend_ops ops;
 665         struct dvb_adapter *dvb;
 666         void *demodulator_priv;
 667         void *tuner_priv;
 668         void *frontend_priv;
 669         void *sec_priv;
 670         void *analog_demod_priv;
 671         struct dtv_frontend_properties dtv_property_cache;
 672 #define DVB_FRONTEND_COMPONENT_TUNER 0
 673 #define DVB_FRONTEND_COMPONENT_DEMOD 1
 674         int (*callback)(void *adapter_priv, int component, int cmd, int arg);
 675         int id;
 676         unsigned int exit;
 677 };
 678
 679 /**
 680  * dvb_register_frontend() - Registers a DVB frontend at the adapter
 681  *
 682  * @dvb: pointer to the dvb adapter
 683  * @fe: pointer to the frontend struct
 684  *
 685  * Allocate and initialize the private data needed by the frontend core to
 686  * manage the frontend and calls dvb_register_device() to register a new
 687  * frontend. It also cleans the property cache that stores the frontend
 688  * parameters and selects the first available delivery system.
 689  */
 690 int dvb_register_frontend(struct dvb_adapter *dvb,
 691                                  struct dvb_frontend *fe);
 692
 693 /**
 694  * dvb_unregister_frontend() - Unregisters a DVB frontend
 695  *
 696  * @fe: pointer to the frontend struct
 697  *
 698  * Stops the frontend kthread, calls dvb_unregister_device() and frees the
 699  * private frontend data allocated by dvb_register_frontend().
 700  *
 701  * NOTE: This function doesn't frees the memory allocated by the demod,
 702  * by the SEC driver and by the tuner. In order to free it, an explicit call to
 703  * dvb_frontend_detach() is needed, after calling this function.
 704  */
 705 int dvb_unregister_frontend(struct dvb_frontend *fe);
 706
 707 /**
 708  * dvb_frontend_detach() - Detaches and frees frontend specific data
 709  *
 710  * @fe: pointer to the frontend struct
 711  *
 712  * This function should be called after dvb_unregister_frontend(). It
 713  * calls the SEC, tuner and demod release functions:
 714  * &dvb_frontend_ops.release_sec, &dvb_frontend_ops.tuner_ops.release,
 715  * &dvb_frontend_ops.analog_ops.release and &dvb_frontend_ops.release.
 716  *
 717  * If the driver is compiled with CONFIG_MEDIA_ATTACH, it also decreases
 718  * the module reference count, needed to allow userspace to remove the
 719  * previously used DVB frontend modules.
 720  */
 721 void dvb_frontend_detach(struct dvb_frontend *fe);
 722
 723 /**
 724  * dvb_frontend_suspend() - Suspends a Digital TV frontend
 725  *
 726  * @fe: pointer to the frontend struct
 727  *
 728  * This function prepares a Digital TV frontend to suspend.
 729  *
 730  * In order to prepare the tuner to suspend, if
 731  * &dvb_frontend_ops.tuner_ops.suspend\(\) is available, it calls it. Otherwise,
 732  * it will call &dvb_frontend_ops.tuner_ops.sleep\(\), if available.
 733  *
 734  * It will also call &dvb_frontend_ops.sleep\(\) to put the demod to suspend.
 735  *
 736  * The drivers should also call dvb_frontend_suspend\(\) as part of their
 737  * handler for the &device_driver.suspend\(\).
 738  */
 739 int dvb_frontend_suspend(struct dvb_frontend *fe);
 740
 741 /**
 742  * dvb_frontend_resume() - Resumes a Digital TV frontend
 743  *
 744  * @fe: pointer to the frontend struct
 745  *
 746  * This function resumes the usual operation of the tuner after resume.
 747  *
 748  * In order to resume the frontend, it calls the demod &dvb_frontend_ops.init\(\).
 749  *
 750  * If &dvb_frontend_ops.tuner_ops.resume\(\) is available, It, it calls it.
 751  * Otherwise,t will call &dvb_frontend_ops.tuner_ops.init\(\), if available.
 752  *
 753  * Once tuner and demods are resumed, it will enforce that the SEC voltage and
 754  * tone are restored to their previous values and wake up the frontend's
 755  * kthread in order to retune the frontend.
 756  *
 757  * The drivers should also call dvb_frontend_resume() as part of their
 758  * handler for the &device_driver.resume\(\).
 759  */
 760 int dvb_frontend_resume(struct dvb_frontend *fe);
 761
 762 /**
 763  * dvb_frontend_reinitialise() - forces a reinitialisation at the frontend
 764  *
 765  * @fe: pointer to the frontend struct
 766  *
 767  * Calls &dvb_frontend_ops.init\(\) and &dvb_frontend_ops.tuner_ops.init\(\),
 768  * and resets SEC tone and voltage (for Satellite systems).
 769  *
 770  * NOTE: Currently, this function is used only by one driver (budget-av).
 771  * It seems to be due to address some special issue with that specific
 772  * frontend.
 773  */
 774 void dvb_frontend_reinitialise(struct dvb_frontend *fe);
 775
 776 /**
 777  * dvb_frontend_sleep_until() - Sleep for the amount of time given by
 778  *                      add_usec parameter
 779  *
 780  * @waketime: pointer to a struct ktime_t
 781  * @add_usec: time to sleep, in microseconds
 782  *
 783  * This function is used to measure the time required for the
 784  * %FE_DISHNETWORK_SEND_LEGACY_CMD ioctl to work. It needs to be as precise
 785  * as possible, as it affects the detection of the dish tone command at the
 786  * satellite subsystem.
 787  *
 788  * Its used internally by the DVB frontend core, in order to emulate
 789  * %FE_DISHNETWORK_SEND_LEGACY_CMD using the &dvb_frontend_ops.set_voltage\(\)
 790  * callback.
 791  *
 792  * NOTE: it should not be used at the drivers, as the emulation for the
 793  * legacy callback is provided by the Kernel. The only situation where this
 794  * should be at the drivers is when there are some bugs at the hardware that
 795  * would prevent the core emulation to work. On such cases, the driver would
 796  * be writing a &dvb_frontend_ops.dishnetwork_send_legacy_command\(\) and
 797  * calling this function directly.
 798  */
 799 void dvb_frontend_sleep_until(ktime_t *waketime, u32 add_usec);
 800
 801 #endif