1 /* 2 V4L2 sub-device support header. 3 4 Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl> 5 6 This program is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2 of the License, or 9 (at your option) any later version. 10 11 This program is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with this program; if not, write to the Free Software 18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 19 */ 20 21 #ifndef _V4L2_SUBDEV_H 22 #define _V4L2_SUBDEV_H 23 24 #include <linux/v4l2-subdev.h> 25 #include <media/media-entity.h> 26 #include <media/v4l2-common.h> 27 #include <media/v4l2-dev.h> 28 #include <media/v4l2-fh.h> 29 #include <media/v4l2-mediabus.h> 30 31 /* generic v4l2_device notify callback notification values */ 32 #define V4L2_SUBDEV_IR_RX_NOTIFY _IOW('v', 0, u32) 33 #define V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ 0x00000001 34 #define V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED 0x00000002 35 #define V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN 0x00000004 36 #define V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN 0x00000008 37 38 #define V4L2_SUBDEV_IR_TX_NOTIFY _IOW('v', 1, u32) 39 #define V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ 0x00000001 40 41 struct v4l2_device; 42 struct v4l2_ctrl_handler; 43 struct v4l2_event_subscription; 44 struct v4l2_fh; 45 struct v4l2_subdev; 46 struct v4l2_subdev_fh; 47 struct tuner_setup; 48 49 /* decode_vbi_line */ 50 struct v4l2_decode_vbi_line { 51 u32 is_second_field; /* Set to 0 for the first (odd) field, 52 set to 1 for the second (even) field. */ 53 u8 *p; /* Pointer to the sliced VBI data from the decoder. 54 On exit points to the start of the payload. */ 55 u32 line; /* Line number of the sliced VBI data (1-23) */ 56 u32 type; /* VBI service type (V4L2_SLICED_*). 0 if no service found */ 57 }; 58 59 /* Sub-devices are devices that are connected somehow to the main bridge 60 device. These devices are usually audio/video muxers/encoders/decoders or 61 sensors and webcam controllers. 62 63 Usually these devices are controlled through an i2c bus, but other busses 64 may also be used. 65 66 The v4l2_subdev struct provides a way of accessing these devices in a 67 generic manner. Most operations that these sub-devices support fall in 68 a few categories: core ops, audio ops, video ops and tuner ops. 69 70 More categories can be added if needed, although this should remain a 71 limited set (no more than approx. 8 categories). 72 73 Each category has its own set of ops that subdev drivers can implement. 74 75 A subdev driver can leave the pointer to the category ops NULL if 76 it does not implement them (e.g. an audio subdev will generally not 77 implement the video category ops). The exception is the core category: 78 this must always be present. 79 80 These ops are all used internally so it is no problem to change, remove 81 or add ops or move ops from one to another category. Currently these 82 ops are based on the original ioctls, but since ops are not limited to 83 one argument there is room for improvement here once all i2c subdev 84 drivers are converted to use these ops. 85 */ 86 87 /* Core ops: it is highly recommended to implement at least these ops: 88 89 g_chip_ident 90 log_status 91 g_register 92 s_register 93 94 This provides basic debugging support. 95 96 The ioctl ops is meant for generic ioctl-like commands. Depending on 97 the use-case it might be better to use subdev-specific ops (currently 98 not yet implemented) since ops provide proper type-checking. 99 */ 100 101 /* Subdevice external IO pin configuration */ 102 #define V4L2_SUBDEV_IO_PIN_DISABLE (1 << 0) /* ENABLE assumed */ 103 #define V4L2_SUBDEV_IO_PIN_OUTPUT (1 << 1) 104 #define V4L2_SUBDEV_IO_PIN_INPUT (1 << 2) 105 #define V4L2_SUBDEV_IO_PIN_SET_VALUE (1 << 3) /* Set output value */ 106 #define V4L2_SUBDEV_IO_PIN_ACTIVE_LOW (1 << 4) /* ACTIVE HIGH assumed */ 107 108 struct v4l2_subdev_io_pin_config { 109 u32 flags; /* V4L2_SUBDEV_IO_PIN_* flags for this pin's config */ 110 u8 pin; /* Chip external IO pin to configure */ 111 u8 function; /* Internal signal pad/function to route to IO pin */ 112 u8 value; /* Initial value for pin - e.g. GPIO output value */ 113 u8 strength; /* Pin drive strength */ 114 }; 115 116 /* 117 s_io_pin_config: configure one or more chip I/O pins for chips that 118 multiplex different internal signal pads out to IO pins. This function 119 takes a pointer to an array of 'n' pin configuration entries, one for 120 each pin being configured. This function could be called at times 121 other than just subdevice initialization. 122 123 init: initialize the sensor registers to some sort of reasonable default 124 values. Do not use for new drivers and should be removed in existing 125 drivers. 126 127 load_fw: load firmware. 128 129 reset: generic reset command. The argument selects which subsystems to 130 reset. Passing 0 will always reset the whole chip. Do not use for new 131 drivers without discussing this first on the linux-media mailinglist. 132 There should be no reason normally to reset a device. 133 134 s_gpio: set GPIO pins. Very simple right now, might need to be extended with 135 a direction argument if needed. 136 137 s_power: puts subdevice in power saving mode (on == 0) or normal operation 138 mode (on == 1). 139 140 interrupt_service_routine: Called by the bridge chip's interrupt service 141 handler, when an interrupt status has be raised due to this subdev, 142 so that this subdev can handle the details. It may schedule work to be 143 performed later. It must not sleep. *Called from an IRQ context*. 144 */ 145 struct v4l2_subdev_core_ops { 146 int (*g_chip_ident)(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip); 147 int (*log_status)(struct v4l2_subdev *sd); 148 int (*s_io_pin_config)(struct v4l2_subdev *sd, size_t n, 149 struct v4l2_subdev_io_pin_config *pincfg); 150 int (*init)(struct v4l2_subdev *sd, u32 val); 151 int (*load_fw)(struct v4l2_subdev *sd); 152 int (*reset)(struct v4l2_subdev *sd, u32 val); 153 int (*s_gpio)(struct v4l2_subdev *sd, u32 val); 154 int (*queryctrl)(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc); 155 int (*g_ctrl)(struct v4l2_subdev *sd, struct v4l2_control *ctrl); 156 int (*s_ctrl)(struct v4l2_subdev *sd, struct v4l2_control *ctrl); 157 int (*g_ext_ctrls)(struct v4l2_subdev *sd, struct v4l2_ext_controls *ctrls); 158 int (*s_ext_ctrls)(struct v4l2_subdev *sd, struct v4l2_ext_controls *ctrls); 159 int (*try_ext_ctrls)(struct v4l2_subdev *sd, struct v4l2_ext_controls *ctrls); 160 int (*querymenu)(struct v4l2_subdev *sd, struct v4l2_querymenu *qm); 161 int (*g_std)(struct v4l2_subdev *sd, v4l2_std_id *norm); 162 int (*s_std)(struct v4l2_subdev *sd, v4l2_std_id norm); 163 long (*ioctl)(struct v4l2_subdev *sd, unsigned int cmd, void *arg); 164 #ifdef CONFIG_VIDEO_ADV_DEBUG 165 int (*g_register)(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg); 166 int (*s_register)(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg); 167 #endif 168 int (*s_power)(struct v4l2_subdev *sd, int on); 169 int (*interrupt_service_routine)(struct v4l2_subdev *sd, 170 u32 status, bool *handled); 171 int (*subscribe_event)(struct v4l2_subdev *sd, struct v4l2_fh *fh, 172 struct v4l2_event_subscription *sub); 173 int (*unsubscribe_event)(struct v4l2_subdev *sd, struct v4l2_fh *fh, 174 struct v4l2_event_subscription *sub); 175 }; 176 177 /* s_radio: v4l device was opened in radio mode. 178 179 g_frequency: freq->type must be filled in. Normally done by video_ioctl2 180 or the bridge driver. 181 182 g_tuner: 183 s_tuner: vt->type must be filled in. Normally done by video_ioctl2 or the 184 bridge driver. 185 186 s_type_addr: sets tuner type and its I2C addr. 187 188 s_config: sets tda9887 specific stuff, like port1, port2 and qss 189 */ 190 struct v4l2_subdev_tuner_ops { 191 int (*s_radio)(struct v4l2_subdev *sd); 192 int (*s_frequency)(struct v4l2_subdev *sd, struct v4l2_frequency *freq); 193 int (*g_frequency)(struct v4l2_subdev *sd, struct v4l2_frequency *freq); 194 int (*g_tuner)(struct v4l2_subdev *sd, struct v4l2_tuner *vt); 195 int (*s_tuner)(struct v4l2_subdev *sd, struct v4l2_tuner *vt); 196 int (*g_modulator)(struct v4l2_subdev *sd, struct v4l2_modulator *vm); 197 int (*s_modulator)(struct v4l2_subdev *sd, const struct v4l2_modulator *vm); 198 int (*s_type_addr)(struct v4l2_subdev *sd, struct tuner_setup *type); 199 int (*s_config)(struct v4l2_subdev *sd, const struct v4l2_priv_tun_config *config); 200 }; 201 202 /* s_clock_freq: set the frequency (in Hz) of the audio clock output. 203 Used to slave an audio processor to the video decoder, ensuring that 204 audio and video remain synchronized. Usual values for the frequency 205 are 48000, 44100 or 32000 Hz. If the frequency is not supported, then 206 -EINVAL is returned. 207 208 s_i2s_clock_freq: sets I2S speed in bps. This is used to provide a standard 209 way to select I2S clock used by driving digital audio streams at some 210 board designs. Usual values for the frequency are 1024000 and 2048000. 211 If the frequency is not supported, then -EINVAL is returned. 212 213 s_routing: used to define the input and/or output pins of an audio chip, 214 and any additional configuration data. 215 Never attempt to use user-level input IDs (e.g. Composite, S-Video, 216 Tuner) at this level. An i2c device shouldn't know about whether an 217 input pin is connected to a Composite connector, become on another 218 board or platform it might be connected to something else entirely. 219 The calling driver is responsible for mapping a user-level input to 220 the right pins on the i2c device. 221 */ 222 struct v4l2_subdev_audio_ops { 223 int (*s_clock_freq)(struct v4l2_subdev *sd, u32 freq); 224 int (*s_i2s_clock_freq)(struct v4l2_subdev *sd, u32 freq); 225 int (*s_routing)(struct v4l2_subdev *sd, u32 input, u32 output, u32 config); 226 int (*s_stream)(struct v4l2_subdev *sd, int enable); 227 }; 228 229 /* 230 s_std_output: set v4l2_std_id for video OUTPUT devices. This is ignored by 231 video input devices. 232 233 g_std_output: get current standard for video OUTPUT devices. This is ignored 234 by video input devices. 235 236 g_tvnorms_output: get v4l2_std_id with all standards supported by video 237 OUTPUT device. This is ignored by video input devices. 238 239 s_crystal_freq: sets the frequency of the crystal used to generate the 240 clocks in Hz. An extra flags field allows device specific configuration 241 regarding clock frequency dividers, etc. If not used, then set flags 242 to 0. If the frequency is not supported, then -EINVAL is returned. 243 244 g_input_status: get input status. Same as the status field in the v4l2_input 245 struct. 246 247 s_routing: see s_routing in audio_ops, except this version is for video 248 devices. 249 250 s_dv_preset: set dv (Digital Video) preset in the sub device. Similar to 251 s_std() 252 253 g_dv_preset: get current dv (Digital Video) preset in the sub device. 254 255 query_dv_preset: query dv preset in the sub device. This is similar to 256 querystd() 257 258 s_dv_timings(): Set custom dv timings in the sub device. This is used 259 when sub device is capable of setting detailed timing information 260 in the hardware to generate/detect the video signal. 261 262 g_dv_timings(): Get custom dv timings in the sub device. 263 264 enum_mbus_fmt: enumerate pixel formats, provided by a video data source 265 266 g_mbus_fmt: get the current pixel format, provided by a video data source 267 268 try_mbus_fmt: try to set a pixel format on a video data source 269 270 s_mbus_fmt: set a pixel format on a video data source 271 272 g_mbus_config: get supported mediabus configurations 273 274 s_mbus_config: set a certain mediabus configuration. This operation is added 275 for compatibility with soc-camera drivers and should not be used by new 276 software. 277 */ 278 struct v4l2_subdev_video_ops { 279 int (*s_routing)(struct v4l2_subdev *sd, u32 input, u32 output, u32 config); 280 int (*s_crystal_freq)(struct v4l2_subdev *sd, u32 freq, u32 flags); 281 int (*s_std_output)(struct v4l2_subdev *sd, v4l2_std_id std); 282 int (*g_std_output)(struct v4l2_subdev *sd, v4l2_std_id *std); 283 int (*querystd)(struct v4l2_subdev *sd, v4l2_std_id *std); 284 int (*g_tvnorms_output)(struct v4l2_subdev *sd, v4l2_std_id *std); 285 int (*g_input_status)(struct v4l2_subdev *sd, u32 *status); 286 int (*s_stream)(struct v4l2_subdev *sd, int enable); 287 int (*cropcap)(struct v4l2_subdev *sd, struct v4l2_cropcap *cc); 288 int (*g_crop)(struct v4l2_subdev *sd, struct v4l2_crop *crop); 289 int (*s_crop)(struct v4l2_subdev *sd, const struct v4l2_crop *crop); 290 int (*g_parm)(struct v4l2_subdev *sd, struct v4l2_streamparm *param); 291 int (*s_parm)(struct v4l2_subdev *sd, struct v4l2_streamparm *param); 292 int (*g_frame_interval)(struct v4l2_subdev *sd, 293 struct v4l2_subdev_frame_interval *interval); 294 int (*s_frame_interval)(struct v4l2_subdev *sd, 295 struct v4l2_subdev_frame_interval *interval); 296 int (*enum_framesizes)(struct v4l2_subdev *sd, struct v4l2_frmsizeenum *fsize); 297 int (*enum_frameintervals)(struct v4l2_subdev *sd, struct v4l2_frmivalenum *fival); 298 int (*enum_dv_presets) (struct v4l2_subdev *sd, 299 struct v4l2_dv_enum_preset *preset); 300 int (*s_dv_preset)(struct v4l2_subdev *sd, 301 struct v4l2_dv_preset *preset); 302 int (*g_dv_preset)(struct v4l2_subdev *sd, 303 struct v4l2_dv_preset *preset); 304 int (*query_dv_preset)(struct v4l2_subdev *sd, 305 struct v4l2_dv_preset *preset); 306 int (*s_dv_timings)(struct v4l2_subdev *sd, 307 struct v4l2_dv_timings *timings); 308 int (*g_dv_timings)(struct v4l2_subdev *sd, 309 struct v4l2_dv_timings *timings); 310 int (*enum_dv_timings)(struct v4l2_subdev *sd, 311 struct v4l2_enum_dv_timings *timings); 312 int (*query_dv_timings)(struct v4l2_subdev *sd, 313 struct v4l2_dv_timings *timings); 314 int (*dv_timings_cap)(struct v4l2_subdev *sd, 315 struct v4l2_dv_timings_cap *cap); 316 int (*enum_mbus_fmt)(struct v4l2_subdev *sd, unsigned int index, 317 enum v4l2_mbus_pixelcode *code); 318 int (*enum_mbus_fsizes)(struct v4l2_subdev *sd, 319 struct v4l2_frmsizeenum *fsize); 320 int (*g_mbus_fmt)(struct v4l2_subdev *sd, 321 struct v4l2_mbus_framefmt *fmt); 322 int (*try_mbus_fmt)(struct v4l2_subdev *sd, 323 struct v4l2_mbus_framefmt *fmt); 324 int (*s_mbus_fmt)(struct v4l2_subdev *sd, 325 struct v4l2_mbus_framefmt *fmt); 326 int (*g_mbus_config)(struct v4l2_subdev *sd, 327 struct v4l2_mbus_config *cfg); 328 int (*s_mbus_config)(struct v4l2_subdev *sd, 329 const struct v4l2_mbus_config *cfg); 330 }; 331 332 /* 333 decode_vbi_line: video decoders that support sliced VBI need to implement 334 this ioctl. Field p of the v4l2_sliced_vbi_line struct is set to the 335 start of the VBI data that was generated by the decoder. The driver 336 then parses the sliced VBI data and sets the other fields in the 337 struct accordingly. The pointer p is updated to point to the start of 338 the payload which can be copied verbatim into the data field of the 339 v4l2_sliced_vbi_data struct. If no valid VBI data was found, then the 340 type field is set to 0 on return. 341 342 s_vbi_data: used to generate VBI signals on a video signal. 343 v4l2_sliced_vbi_data is filled with the data packets that should be 344 output. Note that if you set the line field to 0, then that VBI signal 345 is disabled. If no valid VBI data was found, then the type field is 346 set to 0 on return. 347 348 g_vbi_data: used to obtain the sliced VBI packet from a readback register. 349 Not all video decoders support this. If no data is available because 350 the readback register contains invalid or erroneous data -EIO is 351 returned. Note that you must fill in the 'id' member and the 'field' 352 member (to determine whether CC data from the first or second field 353 should be obtained). 354 355 s_raw_fmt: setup the video encoder/decoder for raw VBI. 356 357 g_sliced_fmt: retrieve the current sliced VBI settings. 358 359 s_sliced_fmt: setup the sliced VBI settings. 360 */ 361 struct v4l2_subdev_vbi_ops { 362 int (*decode_vbi_line)(struct v4l2_subdev *sd, struct v4l2_decode_vbi_line *vbi_line); 363 int (*s_vbi_data)(struct v4l2_subdev *sd, const struct v4l2_sliced_vbi_data *vbi_data); 364 int (*g_vbi_data)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_data *vbi_data); 365 int (*g_sliced_vbi_cap)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_cap *cap); 366 int (*s_raw_fmt)(struct v4l2_subdev *sd, struct v4l2_vbi_format *fmt); 367 int (*g_sliced_fmt)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_format *fmt); 368 int (*s_sliced_fmt)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_format *fmt); 369 }; 370 371 /** 372 * struct v4l2_subdev_sensor_ops - v4l2-subdev sensor operations 373 * @g_skip_top_lines: number of lines at the top of the image to be skipped. 374 * This is needed for some sensors, which always corrupt 375 * several top lines of the output image, or which send their 376 * metadata in them. 377 * @g_skip_frames: number of frames to skip at stream start. This is needed for 378 * buggy sensors that generate faulty frames when they are 379 * turned on. 380 */ 381 struct v4l2_subdev_sensor_ops { 382 int (*g_skip_top_lines)(struct v4l2_subdev *sd, u32 *lines); 383 int (*g_skip_frames)(struct v4l2_subdev *sd, u32 *frames); 384 }; 385 386 /* 387 [rt]x_g_parameters: Get the current operating parameters and state of the 388 the IR receiver or transmitter. 389 390 [rt]x_s_parameters: Set the current operating parameters and state of the 391 the IR receiver or transmitter. It is recommended to call 392 [rt]x_g_parameters first to fill out the current state, and only change 393 the fields that need to be changed. Upon return, the actual device 394 operating parameters and state will be returned. Note that hardware 395 limitations may prevent the actual settings from matching the requested 396 settings - e.g. an actual carrier setting of 35,904 Hz when 36,000 Hz 397 was requested. An exception is when the shutdown parameter is true. 398 The last used operational parameters will be returned, but the actual 399 state of the hardware be different to minimize power consumption and 400 processing when shutdown is true. 401 402 rx_read: Reads received codes or pulse width data. 403 The semantics are similar to a non-blocking read() call. 404 405 tx_write: Writes codes or pulse width data for transmission. 406 The semantics are similar to a non-blocking write() call. 407 */ 408 409 enum v4l2_subdev_ir_mode { 410 V4L2_SUBDEV_IR_MODE_PULSE_WIDTH, /* uses struct ir_raw_event records */ 411 }; 412 413 struct v4l2_subdev_ir_parameters { 414 /* Either Rx or Tx */ 415 unsigned int bytes_per_data_element; /* of data in read or write call */ 416 enum v4l2_subdev_ir_mode mode; 417 418 bool enable; 419 bool interrupt_enable; 420 bool shutdown; /* true: set hardware to low/no power, false: normal */ 421 422 bool modulation; /* true: uses carrier, false: baseband */ 423 u32 max_pulse_width; /* ns, valid only for baseband signal */ 424 unsigned int carrier_freq; /* Hz, valid only for modulated signal*/ 425 unsigned int duty_cycle; /* percent, valid only for modulated signal*/ 426 bool invert_level; /* invert signal level */ 427 428 /* Tx only */ 429 bool invert_carrier_sense; /* Send 0/space as a carrier burst */ 430 431 /* Rx only */ 432 u32 noise_filter_min_width; /* ns, min time of a valid pulse */ 433 unsigned int carrier_range_lower; /* Hz, valid only for modulated sig */ 434 unsigned int carrier_range_upper; /* Hz, valid only for modulated sig */ 435 u32 resolution; /* ns */ 436 }; 437 438 struct v4l2_subdev_ir_ops { 439 /* Receiver */ 440 int (*rx_read)(struct v4l2_subdev *sd, u8 *buf, size_t count, 441 ssize_t *num); 442 443 int (*rx_g_parameters)(struct v4l2_subdev *sd, 444 struct v4l2_subdev_ir_parameters *params); 445 int (*rx_s_parameters)(struct v4l2_subdev *sd, 446 struct v4l2_subdev_ir_parameters *params); 447 448 /* Transmitter */ 449 int (*tx_write)(struct v4l2_subdev *sd, u8 *buf, size_t count, 450 ssize_t *num); 451 452 int (*tx_g_parameters)(struct v4l2_subdev *sd, 453 struct v4l2_subdev_ir_parameters *params); 454 int (*tx_s_parameters)(struct v4l2_subdev *sd, 455 struct v4l2_subdev_ir_parameters *params); 456 }; 457 458 struct v4l2_subdev_pad_ops { 459 int (*enum_mbus_code)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh, 460 struct v4l2_subdev_mbus_code_enum *code); 461 int (*enum_frame_size)(struct v4l2_subdev *sd, 462 struct v4l2_subdev_fh *fh, 463 struct v4l2_subdev_frame_size_enum *fse); 464 int (*enum_frame_interval)(struct v4l2_subdev *sd, 465 struct v4l2_subdev_fh *fh, 466 struct v4l2_subdev_frame_interval_enum *fie); 467 int (*get_fmt)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh, 468 struct v4l2_subdev_format *format); 469 int (*set_fmt)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh, 470 struct v4l2_subdev_format *format); 471 int (*set_crop)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh, 472 struct v4l2_subdev_crop *crop); 473 int (*get_crop)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh, 474 struct v4l2_subdev_crop *crop); 475 int (*get_selection)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh, 476 struct v4l2_subdev_selection *sel); 477 int (*set_selection)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh, 478 struct v4l2_subdev_selection *sel); 479 int (*get_edid)(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid); 480 int (*set_edid)(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid); 481 #ifdef CONFIG_MEDIA_CONTROLLER 482 int (*link_validate)(struct v4l2_subdev *sd, struct media_link *link, 483 struct v4l2_subdev_format *source_fmt, 484 struct v4l2_subdev_format *sink_fmt); 485 #endif /* CONFIG_MEDIA_CONTROLLER */ 486 }; 487 488 struct v4l2_subdev_ops { 489 const struct v4l2_subdev_core_ops *core; 490 const struct v4l2_subdev_tuner_ops *tuner; 491 const struct v4l2_subdev_audio_ops *audio; 492 const struct v4l2_subdev_video_ops *video; 493 const struct v4l2_subdev_vbi_ops *vbi; 494 const struct v4l2_subdev_ir_ops *ir; 495 const struct v4l2_subdev_sensor_ops *sensor; 496 const struct v4l2_subdev_pad_ops *pad; 497 }; 498 499 /* 500 * Internal ops. Never call this from drivers, only the v4l2 framework can call 501 * these ops. 502 * 503 * registered: called when this subdev is registered. When called the v4l2_dev 504 * field is set to the correct v4l2_device. 505 * 506 * unregistered: called when this subdev is unregistered. When called the 507 * v4l2_dev field is still set to the correct v4l2_device. 508 * 509 * open: called when the subdev device node is opened by an application. 510 * 511 * close: called when the subdev device node is closed. 512 */ 513 struct v4l2_subdev_internal_ops { 514 int (*registered)(struct v4l2_subdev *sd); 515 void (*unregistered)(struct v4l2_subdev *sd); 516 int (*open)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh); 517 int (*close)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh); 518 }; 519 520 #define V4L2_SUBDEV_NAME_SIZE 32 521 522 /* Set this flag if this subdev is a i2c device. */ 523 #define V4L2_SUBDEV_FL_IS_I2C (1U << 0) 524 /* Set this flag if this subdev is a spi device. */ 525 #define V4L2_SUBDEV_FL_IS_SPI (1U << 1) 526 /* Set this flag if this subdev needs a device node. */ 527 #define V4L2_SUBDEV_FL_HAS_DEVNODE (1U << 2) 528 /* Set this flag if this subdev generates events. */ 529 #define V4L2_SUBDEV_FL_HAS_EVENTS (1U << 3) 530 531 /* Each instance of a subdev driver should create this struct, either 532 stand-alone or embedded in a larger struct. 533 */ 534 struct v4l2_subdev { 535 #if defined(CONFIG_MEDIA_CONTROLLER) 536 struct media_entity entity; 537 #endif 538 struct list_head list; 539 struct module *owner; 540 u32 flags; 541 struct v4l2_device *v4l2_dev; 542 const struct v4l2_subdev_ops *ops; 543 /* Never call these internal ops from within a driver! */ 544 const struct v4l2_subdev_internal_ops *internal_ops; 545 /* The control handler of this subdev. May be NULL. */ 546 struct v4l2_ctrl_handler *ctrl_handler; 547 /* name must be unique */ 548 char name[V4L2_SUBDEV_NAME_SIZE]; 549 /* can be used to group similar subdevs, value is driver-specific */ 550 u32 grp_id; 551 /* pointer to private data */ 552 void *dev_priv; 553 void *host_priv; 554 /* subdev device node */ 555 struct video_device *devnode; 556 }; 557 558 #define media_entity_to_v4l2_subdev(ent) \ 559 container_of(ent, struct v4l2_subdev, entity) 560 #define vdev_to_v4l2_subdev(vdev) \ 561 ((struct v4l2_subdev *)video_get_drvdata(vdev)) 562 563 /* 564 * Used for storing subdev information per file handle 565 */ 566 struct v4l2_subdev_fh { 567 struct v4l2_fh vfh; 568 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) 569 struct { 570 struct v4l2_mbus_framefmt try_fmt; 571 struct v4l2_rect try_crop; 572 struct v4l2_rect try_compose; 573 } *pad; 574 #endif 575 }; 576 577 #define to_v4l2_subdev_fh(fh) \ 578 container_of(fh, struct v4l2_subdev_fh, vfh) 579 580 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) 581 #define __V4L2_SUBDEV_MK_GET_TRY(rtype, fun_name, field_name) \ 582 static inline struct rtype * \ 583 v4l2_subdev_get_try_##fun_name(struct v4l2_subdev_fh *fh, \ 584 unsigned int pad) \ 585 { \ 586 BUG_ON(unlikely(pad >= vdev_to_v4l2_subdev( \ 587 fh->vfh.vdev)->entity.num_pads)); \ 588 return &fh->pad[pad].field_name; \ 589 } 590 591 __V4L2_SUBDEV_MK_GET_TRY(v4l2_mbus_framefmt, format, try_fmt) 592 __V4L2_SUBDEV_MK_GET_TRY(v4l2_rect, crop, try_compose) 593 __V4L2_SUBDEV_MK_GET_TRY(v4l2_rect, compose, try_compose) 594 #endif 595 596 extern const struct v4l2_file_operations v4l2_subdev_fops; 597 598 static inline void v4l2_set_subdevdata(struct v4l2_subdev *sd, void *p) 599 { 600 sd->dev_priv = p; 601 } 602 603 static inline void *v4l2_get_subdevdata(const struct v4l2_subdev *sd) 604 { 605 return sd->dev_priv; 606 } 607 608 static inline void v4l2_set_subdev_hostdata(struct v4l2_subdev *sd, void *p) 609 { 610 sd->host_priv = p; 611 } 612 613 static inline void *v4l2_get_subdev_hostdata(const struct v4l2_subdev *sd) 614 { 615 return sd->host_priv; 616 } 617 618 #ifdef CONFIG_MEDIA_CONTROLLER 619 int v4l2_subdev_link_validate_default(struct v4l2_subdev *sd, 620 struct media_link *link, 621 struct v4l2_subdev_format *source_fmt, 622 struct v4l2_subdev_format *sink_fmt); 623 int v4l2_subdev_link_validate(struct media_link *link); 624 #endif /* CONFIG_MEDIA_CONTROLLER */ 625 void v4l2_subdev_init(struct v4l2_subdev *sd, 626 const struct v4l2_subdev_ops *ops); 627 628 /* Call an ops of a v4l2_subdev, doing the right checks against 629 NULL pointers. 630 631 Example: err = v4l2_subdev_call(sd, core, g_chip_ident, &chip); 632 */ 633 #define v4l2_subdev_call(sd, o, f, args...) \ 634 (!(sd) ? -ENODEV : (((sd)->ops->o && (sd)->ops->o->f) ? \ 635 (sd)->ops->o->f((sd) , ##args) : -ENOIOCTLCMD)) 636 637 /* Send a notification to v4l2_device. */ 638 #define v4l2_subdev_notify(sd, notification, arg) \ 639 ((!(sd) || !(sd)->v4l2_dev || !(sd)->v4l2_dev->notify) ? -ENODEV : \ 640 (sd)->v4l2_dev->notify((sd), (notification), (arg))) 641 642 #endif 643