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 17 #ifndef _V4L2_SUBDEV_H 18 #define _V4L2_SUBDEV_H 19 20 #include <linux/types.h> 21 #include <linux/v4l2-subdev.h> 22 #include <media/media-entity.h> 23 #include <media/v4l2-async.h> 24 #include <media/v4l2-common.h> 25 #include <media/v4l2-dev.h> 26 #include <media/v4l2-fh.h> 27 #include <media/v4l2-mediabus.h> 28 29 /* generic v4l2_device notify callback notification values */ 30 #define V4L2_SUBDEV_IR_RX_NOTIFY _IOW('v', 0, u32) 31 #define V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ 0x00000001 32 #define V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED 0x00000002 33 #define V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN 0x00000004 34 #define V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN 0x00000008 35 36 #define V4L2_SUBDEV_IR_TX_NOTIFY _IOW('v', 1, u32) 37 #define V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ 0x00000001 38 39 #define V4L2_DEVICE_NOTIFY_EVENT _IOW('v', 2, struct v4l2_event) 40 41 struct v4l2_device; 42 struct v4l2_ctrl_handler; 43 struct v4l2_event; 44 struct v4l2_event_subscription; 45 struct v4l2_fh; 46 struct v4l2_subdev; 47 struct v4l2_subdev_fh; 48 struct tuner_setup; 49 struct v4l2_mbus_frame_desc; 50 51 /** 52 * struct v4l2_decode_vbi_line - used to decode_vbi_line 53 * 54 * @is_second_field: Set to 0 for the first (odd) field; 55 * set to 1 for the second (even) field. 56 * @p: Pointer to the sliced VBI data from the decoder. On exit, points to 57 * the start of the payload. 58 * @line: Line number of the sliced VBI data (1-23) 59 * @type: VBI service type (V4L2_SLICED_*). 0 if no service found 60 */ 61 struct v4l2_decode_vbi_line { 62 u32 is_second_field; 63 u8 *p; 64 u32 line; 65 u32 type; 66 }; 67 68 /* 69 * Sub-devices are devices that are connected somehow to the main bridge 70 * device. These devices are usually audio/video muxers/encoders/decoders or 71 * sensors and webcam controllers. 72 * 73 * Usually these devices are controlled through an i2c bus, but other busses 74 * may also be used. 75 * 76 * The v4l2_subdev struct provides a way of accessing these devices in a 77 * generic manner. Most operations that these sub-devices support fall in 78 * a few categories: core ops, audio ops, video ops and tuner ops. 79 * 80 * More categories can be added if needed, although this should remain a 81 * limited set (no more than approx. 8 categories). 82 * 83 * Each category has its own set of ops that subdev drivers can implement. 84 * 85 * A subdev driver can leave the pointer to the category ops NULL if 86 * it does not implement them (e.g. an audio subdev will generally not 87 * implement the video category ops). The exception is the core category: 88 * this must always be present. 89 * 90 * These ops are all used internally so it is no problem to change, remove 91 * or add ops or move ops from one to another category. Currently these 92 * ops are based on the original ioctls, but since ops are not limited to 93 * one argument there is room for improvement here once all i2c subdev 94 * drivers are converted to use these ops. 95 */ 96 97 /* 98 * Core ops: it is highly recommended to implement at least these ops: 99 * 100 * log_status 101 * g_register 102 * s_register 103 * 104 * This provides basic debugging support. 105 * 106 * The ioctl ops is meant for generic ioctl-like commands. Depending on 107 * the use-case it might be better to use subdev-specific ops (currently 108 * not yet implemented) since ops provide proper type-checking. 109 */ 110 111 /* Subdevice external IO pin configuration */ 112 #define V4L2_SUBDEV_IO_PIN_DISABLE (1 << 0) /* ENABLE assumed */ 113 #define V4L2_SUBDEV_IO_PIN_OUTPUT (1 << 1) 114 #define V4L2_SUBDEV_IO_PIN_INPUT (1 << 2) 115 #define V4L2_SUBDEV_IO_PIN_SET_VALUE (1 << 3) /* Set output value */ 116 #define V4L2_SUBDEV_IO_PIN_ACTIVE_LOW (1 << 4) /* ACTIVE HIGH assumed */ 117 118 /** 119 * struct v4l2_subdev_io_pin_config - Subdevice external IO pin configuration 120 * 121 * @flags: bitmask with flags for this pin's config: 122 * %V4L2_SUBDEV_IO_PIN_DISABLE - disables a pin config, 123 * %V4L2_SUBDEV_IO_PIN_OUTPUT - if pin is an output, 124 * %V4L2_SUBDEV_IO_PIN_INPUT - if pin is an input, 125 * %V4L2_SUBDEV_IO_PIN_SET_VALUE - to set the output value via @value 126 * and %V4L2_SUBDEV_IO_PIN_ACTIVE_LOW - if active is 0. 127 * @pin: Chip external IO pin to configure 128 * @function: Internal signal pad/function to route to IO pin 129 * @value: Initial value for pin - e.g. GPIO output value 130 * @strength: Pin drive strength 131 */ 132 struct v4l2_subdev_io_pin_config { 133 u32 flags; 134 u8 pin; 135 u8 function; 136 u8 value; 137 u8 strength; 138 }; 139 140 /** 141 * struct v4l2_subdev_core_ops - Define core ops callbacks for subdevs 142 * 143 * @log_status: callback for %VIDIOC_LOG_STATUS ioctl handler code. 144 * 145 * @s_io_pin_config: configure one or more chip I/O pins for chips that 146 * multiplex different internal signal pads out to IO pins. This function 147 * takes a pointer to an array of 'n' pin configuration entries, one for 148 * each pin being configured. This function could be called at times 149 * other than just subdevice initialization. 150 * 151 * @init: initialize the sensor registers to some sort of reasonable default 152 * values. Do not use for new drivers and should be removed in existing 153 * drivers. 154 * 155 * @load_fw: load firmware. 156 * 157 * @reset: generic reset command. The argument selects which subsystems to 158 * reset. Passing 0 will always reset the whole chip. Do not use for new 159 * drivers without discussing this first on the linux-media mailinglist. 160 * There should be no reason normally to reset a device. 161 * 162 * @s_gpio: set GPIO pins. Very simple right now, might need to be extended with 163 * a direction argument if needed. 164 * 165 * @ioctl: called at the end of ioctl() syscall handler at the V4L2 core. 166 * used to provide support for private ioctls used on the driver. 167 * 168 * @compat_ioctl32: called when a 32 bits application uses a 64 bits Kernel, 169 * in order to fix data passed from/to userspace. 170 * 171 * @g_register: callback for %VIDIOC_G_REGISTER ioctl handler code. 172 * 173 * @s_register: callback for %VIDIOC_G_REGISTER ioctl handler code. 174 * 175 * @s_power: puts subdevice in power saving mode (on == 0) or normal operation 176 * mode (on == 1). 177 * 178 * @interrupt_service_routine: Called by the bridge chip's interrupt service 179 * handler, when an interrupt status has be raised due to this subdev, 180 * so that this subdev can handle the details. It may schedule work to be 181 * performed later. It must not sleep. **Called from an IRQ context**. 182 * 183 * @subscribe_event: used by the drivers to request the control framework that 184 * for it to be warned when the value of a control changes. 185 * 186 * @unsubscribe_event: remove event subscription from the control framework. 187 * 188 * @registered_async: the subdevice has been registered async. 189 */ 190 struct v4l2_subdev_core_ops { 191 int (*log_status)(struct v4l2_subdev *sd); 192 int (*s_io_pin_config)(struct v4l2_subdev *sd, size_t n, 193 struct v4l2_subdev_io_pin_config *pincfg); 194 int (*init)(struct v4l2_subdev *sd, u32 val); 195 int (*load_fw)(struct v4l2_subdev *sd); 196 int (*reset)(struct v4l2_subdev *sd, u32 val); 197 int (*s_gpio)(struct v4l2_subdev *sd, u32 val); 198 long (*ioctl)(struct v4l2_subdev *sd, unsigned int cmd, void *arg); 199 #ifdef CONFIG_COMPAT 200 long (*compat_ioctl32)(struct v4l2_subdev *sd, unsigned int cmd, 201 unsigned long arg); 202 #endif 203 #ifdef CONFIG_VIDEO_ADV_DEBUG 204 int (*g_register)(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg); 205 int (*s_register)(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg); 206 #endif 207 int (*s_power)(struct v4l2_subdev *sd, int on); 208 int (*interrupt_service_routine)(struct v4l2_subdev *sd, 209 u32 status, bool *handled); 210 int (*subscribe_event)(struct v4l2_subdev *sd, struct v4l2_fh *fh, 211 struct v4l2_event_subscription *sub); 212 int (*unsubscribe_event)(struct v4l2_subdev *sd, struct v4l2_fh *fh, 213 struct v4l2_event_subscription *sub); 214 int (*registered_async)(struct v4l2_subdev *sd); 215 }; 216 217 /** 218 * struct s_radio - Callbacks used when v4l device was opened in radio mode. 219 * 220 * @s_radio: callback for %VIDIOC_S_RADIO ioctl handler code. 221 * 222 * @s_frequency: callback for %VIDIOC_S_FREQUENCY ioctl handler code. 223 * 224 * @g_frequency: callback for %VIDIOC_G_FREQUENCY ioctl handler code. 225 * freq->type must be filled in. Normally done by video_ioctl2() 226 * or the bridge driver. 227 * 228 * @enum_freq_bands: callback for %VIDIOC_ENUM_FREQ_BANDS ioctl handler code. 229 * 230 * @g_tuner: callback for %VIDIOC_G_TUNER ioctl handler code. 231 * 232 * @s_tuner: callback for %VIDIOC_S_TUNER ioctl handler code. &vt->type must be 233 * filled in. Normally done by video_ioctl2 or the 234 * bridge driver. 235 * 236 * @g_modulator: callback for %VIDIOC_G_MODULATOR ioctl handler code. 237 * 238 * @s_modulator: callback for %VIDIOC_S_MODULATOR ioctl handler code. 239 * 240 * @s_type_addr: sets tuner type and its I2C addr. 241 * 242 * @s_config: sets tda9887 specific stuff, like port1, port2 and qss 243 */ 244 struct v4l2_subdev_tuner_ops { 245 int (*s_radio)(struct v4l2_subdev *sd); 246 int (*s_frequency)(struct v4l2_subdev *sd, const struct v4l2_frequency *freq); 247 int (*g_frequency)(struct v4l2_subdev *sd, struct v4l2_frequency *freq); 248 int (*enum_freq_bands)(struct v4l2_subdev *sd, struct v4l2_frequency_band *band); 249 int (*g_tuner)(struct v4l2_subdev *sd, struct v4l2_tuner *vt); 250 int (*s_tuner)(struct v4l2_subdev *sd, const struct v4l2_tuner *vt); 251 int (*g_modulator)(struct v4l2_subdev *sd, struct v4l2_modulator *vm); 252 int (*s_modulator)(struct v4l2_subdev *sd, const struct v4l2_modulator *vm); 253 int (*s_type_addr)(struct v4l2_subdev *sd, struct tuner_setup *type); 254 int (*s_config)(struct v4l2_subdev *sd, const struct v4l2_priv_tun_config *config); 255 }; 256 257 /** 258 * struct v4l2_subdev_audio_ops - Callbacks used for audio-related settings 259 * 260 * @s_clock_freq: set the frequency (in Hz) of the audio clock output. 261 * Used to slave an audio processor to the video decoder, ensuring that 262 * audio and video remain synchronized. Usual values for the frequency 263 * are 48000, 44100 or 32000 Hz. If the frequency is not supported, then 264 * -EINVAL is returned. 265 * 266 * @s_i2s_clock_freq: sets I2S speed in bps. This is used to provide a standard 267 * way to select I2S clock used by driving digital audio streams at some 268 * board designs. Usual values for the frequency are 1024000 and 2048000. 269 * If the frequency is not supported, then %-EINVAL is returned. 270 * 271 * @s_routing: used to define the input and/or output pins of an audio chip, 272 * and any additional configuration data. 273 * Never attempt to use user-level input IDs (e.g. Composite, S-Video, 274 * Tuner) at this level. An i2c device shouldn't know about whether an 275 * input pin is connected to a Composite connector, become on another 276 * board or platform it might be connected to something else entirely. 277 * The calling driver is responsible for mapping a user-level input to 278 * the right pins on the i2c device. 279 * 280 * @s_stream: used to notify the audio code that stream will start or has 281 * stopped. 282 */ 283 struct v4l2_subdev_audio_ops { 284 int (*s_clock_freq)(struct v4l2_subdev *sd, u32 freq); 285 int (*s_i2s_clock_freq)(struct v4l2_subdev *sd, u32 freq); 286 int (*s_routing)(struct v4l2_subdev *sd, u32 input, u32 output, u32 config); 287 int (*s_stream)(struct v4l2_subdev *sd, int enable); 288 }; 289 290 /* Indicates the @length field specifies maximum data length. */ 291 #define V4L2_MBUS_FRAME_DESC_FL_LEN_MAX (1U << 0) 292 /* 293 * Indicates that the format does not have line offsets, i.e. the 294 * receiver should use 1D DMA. 295 */ 296 #define V4L2_MBUS_FRAME_DESC_FL_BLOB (1U << 1) 297 298 /** 299 * struct v4l2_mbus_frame_desc_entry - media bus frame description structure 300 * 301 * @flags: bitmask flags: %V4L2_MBUS_FRAME_DESC_FL_LEN_MAX and 302 * %V4L2_MBUS_FRAME_DESC_FL_BLOB. 303 * @pixelcode: media bus pixel code, valid if FRAME_DESC_FL_BLOB is not set 304 * @length: number of octets per frame, valid if V4L2_MBUS_FRAME_DESC_FL_BLOB 305 * is set 306 */ 307 struct v4l2_mbus_frame_desc_entry { 308 u16 flags; 309 u32 pixelcode; 310 u32 length; 311 }; 312 313 #define V4L2_FRAME_DESC_ENTRY_MAX 4 314 315 /** 316 * struct v4l2_mbus_frame_desc - media bus data frame description 317 * @entry: frame descriptors array 318 * @num_entries: number of entries in @entry array 319 */ 320 struct v4l2_mbus_frame_desc { 321 struct v4l2_mbus_frame_desc_entry entry[V4L2_FRAME_DESC_ENTRY_MAX]; 322 unsigned short num_entries; 323 }; 324 325 /** 326 * struct v4l2_subdev_video_ops - Callbacks used when v4l device was opened 327 * in video mode. 328 * 329 * @s_routing: see s_routing in audio_ops, except this version is for video 330 * devices. 331 * 332 * @s_crystal_freq: sets the frequency of the crystal used to generate the 333 * clocks in Hz. An extra flags field allows device specific configuration 334 * regarding clock frequency dividers, etc. If not used, then set flags 335 * to 0. If the frequency is not supported, then -EINVAL is returned. 336 * 337 * @g_std: callback for %VIDIOC_G_STD ioctl handler code. 338 * 339 * @s_std: callback for %VIDIOC_S_STD ioctl handler code. 340 * 341 * @s_std_output: set v4l2_std_id for video OUTPUT devices. This is ignored by 342 * video input devices. 343 * 344 * @g_std_output: get current standard for video OUTPUT devices. This is ignored 345 * by video input devices. 346 * 347 * @querystd: callback for %VIDIOC_QUERYSTD ioctl handler code. 348 * 349 * @g_tvnorms: get &v4l2_std_id with all standards supported by the video 350 * CAPTURE device. This is ignored by video output devices. 351 * 352 * @g_tvnorms_output: get v4l2_std_id with all standards supported by the video 353 * OUTPUT device. This is ignored by video capture devices. 354 * 355 * @g_input_status: get input status. Same as the status field in the 356 * &struct &v4l2_input 357 * 358 * @s_stream: used to notify the driver that a video stream will start or has 359 * stopped. 360 * 361 * @cropcap: callback for %VIDIOC_CROPCAP ioctl handler code. 362 * 363 * @g_crop: callback for %VIDIOC_G_CROP ioctl handler code. 364 * 365 * @s_crop: callback for %VIDIOC_S_CROP ioctl handler code. 366 * 367 * @g_parm: callback for %VIDIOC_G_PARM ioctl handler code. 368 * 369 * @s_parm: callback for %VIDIOC_S_PARM ioctl handler code. 370 * 371 * @g_frame_interval: callback for %VIDIOC_G_FRAMEINTERVAL ioctl handler code. 372 * 373 * @s_frame_interval: callback for %VIDIOC_S_FRAMEINTERVAL ioctl handler code. 374 * 375 * @s_dv_timings: Set custom dv timings in the sub device. This is used 376 * when sub device is capable of setting detailed timing information 377 * in the hardware to generate/detect the video signal. 378 * 379 * @g_dv_timings: Get custom dv timings in the sub device. 380 * 381 * @query_dv_timings: callback for %VIDIOC_QUERY_DV_TIMINGS ioctl handler code. 382 * 383 * @g_mbus_config: get supported mediabus configurations 384 * 385 * @s_mbus_config: set a certain mediabus configuration. This operation is added 386 * for compatibility with soc-camera drivers and should not be used by new 387 * software. 388 * 389 * @s_rx_buffer: set a host allocated memory buffer for the subdev. The subdev 390 * can adjust @size to a lower value and must not write more data to the 391 * buffer starting at @data than the original value of @size. 392 */ 393 struct v4l2_subdev_video_ops { 394 int (*s_routing)(struct v4l2_subdev *sd, u32 input, u32 output, u32 config); 395 int (*s_crystal_freq)(struct v4l2_subdev *sd, u32 freq, u32 flags); 396 int (*g_std)(struct v4l2_subdev *sd, v4l2_std_id *norm); 397 int (*s_std)(struct v4l2_subdev *sd, v4l2_std_id norm); 398 int (*s_std_output)(struct v4l2_subdev *sd, v4l2_std_id std); 399 int (*g_std_output)(struct v4l2_subdev *sd, v4l2_std_id *std); 400 int (*querystd)(struct v4l2_subdev *sd, v4l2_std_id *std); 401 int (*g_tvnorms)(struct v4l2_subdev *sd, v4l2_std_id *std); 402 int (*g_tvnorms_output)(struct v4l2_subdev *sd, v4l2_std_id *std); 403 int (*g_input_status)(struct v4l2_subdev *sd, u32 *status); 404 int (*s_stream)(struct v4l2_subdev *sd, int enable); 405 int (*cropcap)(struct v4l2_subdev *sd, struct v4l2_cropcap *cc); 406 int (*g_crop)(struct v4l2_subdev *sd, struct v4l2_crop *crop); 407 int (*s_crop)(struct v4l2_subdev *sd, const struct v4l2_crop *crop); 408 int (*g_parm)(struct v4l2_subdev *sd, struct v4l2_streamparm *param); 409 int (*s_parm)(struct v4l2_subdev *sd, struct v4l2_streamparm *param); 410 int (*g_frame_interval)(struct v4l2_subdev *sd, 411 struct v4l2_subdev_frame_interval *interval); 412 int (*s_frame_interval)(struct v4l2_subdev *sd, 413 struct v4l2_subdev_frame_interval *interval); 414 int (*s_dv_timings)(struct v4l2_subdev *sd, 415 struct v4l2_dv_timings *timings); 416 int (*g_dv_timings)(struct v4l2_subdev *sd, 417 struct v4l2_dv_timings *timings); 418 int (*query_dv_timings)(struct v4l2_subdev *sd, 419 struct v4l2_dv_timings *timings); 420 int (*g_mbus_config)(struct v4l2_subdev *sd, 421 struct v4l2_mbus_config *cfg); 422 int (*s_mbus_config)(struct v4l2_subdev *sd, 423 const struct v4l2_mbus_config *cfg); 424 int (*s_rx_buffer)(struct v4l2_subdev *sd, void *buf, 425 unsigned int *size); 426 }; 427 428 /** 429 * struct v4l2_subdev_vbi_ops - Callbacks used when v4l device was opened 430 * in video mode via the vbi device node. 431 * 432 * @decode_vbi_line: video decoders that support sliced VBI need to implement 433 * this ioctl. Field p of the &struct v4l2_sliced_vbi_line is set to the 434 * start of the VBI data that was generated by the decoder. The driver 435 * then parses the sliced VBI data and sets the other fields in the 436 * struct accordingly. The pointer p is updated to point to the start of 437 * the payload which can be copied verbatim into the data field of the 438 * &struct v4l2_sliced_vbi_data. If no valid VBI data was found, then the 439 * type field is set to 0 on return. 440 * 441 * @s_vbi_data: used to generate VBI signals on a video signal. 442 * &struct v4l2_sliced_vbi_data is filled with the data packets that 443 * should be output. Note that if you set the line field to 0, then that 444 * VBI signal is disabled. If no valid VBI data was found, then the type 445 * field is set to 0 on return. 446 * 447 * @g_vbi_data: used to obtain the sliced VBI packet from a readback register. 448 * Not all video decoders support this. If no data is available because 449 * the readback register contains invalid or erroneous data %-EIO is 450 * returned. Note that you must fill in the 'id' member and the 'field' 451 * member (to determine whether CC data from the first or second field 452 * should be obtained). 453 * 454 * @g_sliced_vbi_cap: callback for %VIDIOC_SLICED_VBI_CAP ioctl handler code. 455 * 456 * @s_raw_fmt: setup the video encoder/decoder for raw VBI. 457 * 458 * @g_sliced_fmt: retrieve the current sliced VBI settings. 459 * 460 * @s_sliced_fmt: setup the sliced VBI settings. 461 */ 462 struct v4l2_subdev_vbi_ops { 463 int (*decode_vbi_line)(struct v4l2_subdev *sd, struct v4l2_decode_vbi_line *vbi_line); 464 int (*s_vbi_data)(struct v4l2_subdev *sd, const struct v4l2_sliced_vbi_data *vbi_data); 465 int (*g_vbi_data)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_data *vbi_data); 466 int (*g_sliced_vbi_cap)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_cap *cap); 467 int (*s_raw_fmt)(struct v4l2_subdev *sd, struct v4l2_vbi_format *fmt); 468 int (*g_sliced_fmt)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_format *fmt); 469 int (*s_sliced_fmt)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_format *fmt); 470 }; 471 472 /** 473 * struct v4l2_subdev_sensor_ops - v4l2-subdev sensor operations 474 * @g_skip_top_lines: number of lines at the top of the image to be skipped. 475 * This is needed for some sensors, which always corrupt 476 * several top lines of the output image, or which send their 477 * metadata in them. 478 * @g_skip_frames: number of frames to skip at stream start. This is needed for 479 * buggy sensors that generate faulty frames when they are 480 * turned on. 481 */ 482 struct v4l2_subdev_sensor_ops { 483 int (*g_skip_top_lines)(struct v4l2_subdev *sd, u32 *lines); 484 int (*g_skip_frames)(struct v4l2_subdev *sd, u32 *frames); 485 }; 486 487 /** 488 * enum v4l2_subdev_ir_mode- describes the type of IR supported 489 * 490 * @V4L2_SUBDEV_IR_MODE_PULSE_WIDTH: IR uses struct ir_raw_event records 491 */ 492 enum v4l2_subdev_ir_mode { 493 V4L2_SUBDEV_IR_MODE_PULSE_WIDTH, 494 }; 495 496 /** 497 * struct v4l2_subdev_ir_parameters - Parameters for IR TX or TX 498 * 499 * @bytes_per_data_element: bytes per data element of data in read or 500 * write call. 501 * @mode: IR mode as defined by &enum v4l2_subdev_ir_mode. 502 * @enable: device is active if true 503 * @interrupt_enable: IR interrupts are enabled if true 504 * @shutdown: if true: set hardware to low/no power, false: normal mode 505 * 506 * @modulation: if true, it uses carrier, if false: baseband 507 * @max_pulse_width: maximum pulse width in ns, valid only for baseband signal 508 * @carrier_freq: carrier frequency in Hz, valid only for modulated signal 509 * @duty_cycle: duty cycle percentage, valid only for modulated signal 510 * @invert_level: invert signal level 511 * 512 * @invert_carrier_sense: Send 0/space as a carrier burst. used only in TX. 513 * 514 * @noise_filter_min_width: min time of a valid pulse, in ns. Used only for RX. 515 * @carrier_range_lower: Lower carrier range, in Hz, valid only for modulated 516 * signal. Used only for RX. 517 * @carrier_range_upper: Upper carrier range, in Hz, valid only for modulated 518 * signal. Used only for RX. 519 * @resolution: The receive resolution, in ns . Used only for RX. 520 */ 521 struct v4l2_subdev_ir_parameters { 522 unsigned int bytes_per_data_element; 523 enum v4l2_subdev_ir_mode mode; 524 525 bool enable; 526 bool interrupt_enable; 527 bool shutdown; 528 529 bool modulation; 530 u32 max_pulse_width; 531 unsigned int carrier_freq; 532 unsigned int duty_cycle; 533 bool invert_level; 534 535 /* Tx only */ 536 bool invert_carrier_sense; 537 538 /* Rx only */ 539 u32 noise_filter_min_width; 540 unsigned int carrier_range_lower; 541 unsigned int carrier_range_upper; 542 u32 resolution; 543 }; 544 545 /** 546 * struct v4l2_subdev_ir_ops - operations for IR subdevices 547 * 548 * @rx_read: Reads received codes or pulse width data. 549 * The semantics are similar to a non-blocking read() call. 550 * @rx_g_parameters: Get the current operating parameters and state of the 551 * the IR receiver. 552 * @rx_s_parameters: Set the current operating parameters and state of the 553 * the IR receiver. It is recommended to call 554 * [rt]x_g_parameters first to fill out the current state, and only change 555 * the fields that need to be changed. Upon return, the actual device 556 * operating parameters and state will be returned. Note that hardware 557 * limitations may prevent the actual settings from matching the requested 558 * settings - e.g. an actual carrier setting of 35,904 Hz when 36,000 Hz 559 * was requested. An exception is when the shutdown parameter is true. 560 * The last used operational parameters will be returned, but the actual 561 * state of the hardware be different to minimize power consumption and 562 * processing when shutdown is true. 563 * 564 * @tx_write: Writes codes or pulse width data for transmission. 565 * The semantics are similar to a non-blocking write() call. 566 * @tx_g_parameters: Get the current operating parameters and state of the 567 * the IR transmitter. 568 * @tx_s_parameters: Set the current operating parameters and state of the 569 * the IR transmitter. It is recommended to call 570 * [rt]x_g_parameters first to fill out the current state, and only change 571 * the fields that need to be changed. Upon return, the actual device 572 * operating parameters and state will be returned. Note that hardware 573 * limitations may prevent the actual settings from matching the requested 574 * settings - e.g. an actual carrier setting of 35,904 Hz when 36,000 Hz 575 * was requested. An exception is when the shutdown parameter is true. 576 * The last used operational parameters will be returned, but the actual 577 * state of the hardware be different to minimize power consumption and 578 * processing when shutdown is true. 579 */ 580 struct v4l2_subdev_ir_ops { 581 /* Receiver */ 582 int (*rx_read)(struct v4l2_subdev *sd, u8 *buf, size_t count, 583 ssize_t *num); 584 585 int (*rx_g_parameters)(struct v4l2_subdev *sd, 586 struct v4l2_subdev_ir_parameters *params); 587 int (*rx_s_parameters)(struct v4l2_subdev *sd, 588 struct v4l2_subdev_ir_parameters *params); 589 590 /* Transmitter */ 591 int (*tx_write)(struct v4l2_subdev *sd, u8 *buf, size_t count, 592 ssize_t *num); 593 594 int (*tx_g_parameters)(struct v4l2_subdev *sd, 595 struct v4l2_subdev_ir_parameters *params); 596 int (*tx_s_parameters)(struct v4l2_subdev *sd, 597 struct v4l2_subdev_ir_parameters *params); 598 }; 599 600 /** 601 * struct v4l2_subdev_pad_config - Used for storing subdev pad information. 602 * 603 * @try_fmt: pointer to &struct v4l2_mbus_framefmt 604 * @try_crop: pointer to &struct v4l2_rect to be used for crop 605 * @try_compose: pointer to &struct v4l2_rect to be used for compose 606 * 607 * This structure only needs to be passed to the pad op if the 'which' field 608 * of the main argument is set to %V4L2_SUBDEV_FORMAT_TRY. For 609 * %V4L2_SUBDEV_FORMAT_ACTIVE it is safe to pass %NULL. 610 */ 611 struct v4l2_subdev_pad_config { 612 struct v4l2_mbus_framefmt try_fmt; 613 struct v4l2_rect try_crop; 614 struct v4l2_rect try_compose; 615 }; 616 617 /** 618 * struct v4l2_subdev_pad_ops - v4l2-subdev pad level operations 619 * 620 * @init_cfg: initialize the pad config to default values 621 * @enum_mbus_code: callback for %VIDIOC_SUBDEV_ENUM_MBUS_CODE ioctl handler 622 * code. 623 * @enum_frame_size: callback for %VIDIOC_SUBDEV_ENUM_FRAME_SIZE ioctl handler 624 * code. 625 * 626 * @enum_frame_interval: callback for %VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL ioctl 627 * handler code. 628 * 629 * @get_fmt: callback for %VIDIOC_SUBDEV_G_FMT ioctl handler code. 630 * 631 * @set_fmt: callback for %VIDIOC_SUBDEV_S_FMT ioctl handler code. 632 * 633 * @get_selection: callback for %VIDIOC_SUBDEV_G_SELECTION ioctl handler code. 634 * 635 * @set_selection: callback for %VIDIOC_SUBDEV_S_SELECTION ioctl handler code. 636 * 637 * @get_edid: callback for %VIDIOC_SUBDEV_G_EDID ioctl handler code. 638 * 639 * @set_edid: callback for %VIDIOC_SUBDEV_S_EDID ioctl handler code. 640 * 641 * @dv_timings_cap: callback for %VIDIOC_SUBDEV_DV_TIMINGS_CAP ioctl handler 642 * code. 643 * 644 * @enum_dv_timings: callback for %VIDIOC_SUBDEV_ENUM_DV_TIMINGS ioctl handler 645 * code. 646 * 647 * @link_validate: used by the media controller code to check if the links 648 * that belongs to a pipeline can be used for stream. 649 * 650 * @get_frame_desc: get the current low level media bus frame parameters. 651 * 652 * @set_frame_desc: set the low level media bus frame parameters, @fd array 653 * may be adjusted by the subdev driver to device capabilities. 654 */ 655 struct v4l2_subdev_pad_ops { 656 int (*init_cfg)(struct v4l2_subdev *sd, 657 struct v4l2_subdev_pad_config *cfg); 658 int (*enum_mbus_code)(struct v4l2_subdev *sd, 659 struct v4l2_subdev_pad_config *cfg, 660 struct v4l2_subdev_mbus_code_enum *code); 661 int (*enum_frame_size)(struct v4l2_subdev *sd, 662 struct v4l2_subdev_pad_config *cfg, 663 struct v4l2_subdev_frame_size_enum *fse); 664 int (*enum_frame_interval)(struct v4l2_subdev *sd, 665 struct v4l2_subdev_pad_config *cfg, 666 struct v4l2_subdev_frame_interval_enum *fie); 667 int (*get_fmt)(struct v4l2_subdev *sd, 668 struct v4l2_subdev_pad_config *cfg, 669 struct v4l2_subdev_format *format); 670 int (*set_fmt)(struct v4l2_subdev *sd, 671 struct v4l2_subdev_pad_config *cfg, 672 struct v4l2_subdev_format *format); 673 int (*get_selection)(struct v4l2_subdev *sd, 674 struct v4l2_subdev_pad_config *cfg, 675 struct v4l2_subdev_selection *sel); 676 int (*set_selection)(struct v4l2_subdev *sd, 677 struct v4l2_subdev_pad_config *cfg, 678 struct v4l2_subdev_selection *sel); 679 int (*get_edid)(struct v4l2_subdev *sd, struct v4l2_edid *edid); 680 int (*set_edid)(struct v4l2_subdev *sd, struct v4l2_edid *edid); 681 int (*dv_timings_cap)(struct v4l2_subdev *sd, 682 struct v4l2_dv_timings_cap *cap); 683 int (*enum_dv_timings)(struct v4l2_subdev *sd, 684 struct v4l2_enum_dv_timings *timings); 685 #ifdef CONFIG_MEDIA_CONTROLLER 686 int (*link_validate)(struct v4l2_subdev *sd, struct media_link *link, 687 struct v4l2_subdev_format *source_fmt, 688 struct v4l2_subdev_format *sink_fmt); 689 #endif /* CONFIG_MEDIA_CONTROLLER */ 690 int (*get_frame_desc)(struct v4l2_subdev *sd, unsigned int pad, 691 struct v4l2_mbus_frame_desc *fd); 692 int (*set_frame_desc)(struct v4l2_subdev *sd, unsigned int pad, 693 struct v4l2_mbus_frame_desc *fd); 694 }; 695 696 /** 697 * struct v4l2_subdev_ops - Subdev operations 698 * 699 * @core: pointer to &struct v4l2_subdev_core_ops. Can be %NULL 700 * @tuner: pointer to &struct v4l2_subdev_tuner_ops. Can be %NULL 701 * @audio: pointer to &struct v4l2_subdev_audio_ops. Can be %NULL 702 * @video: pointer to &struct v4l2_subdev_video_ops. Can be %NULL 703 * @vbi: pointer to &struct v4l2_subdev_vbi_ops. Can be %NULL 704 * @ir: pointer to &struct v4l2_subdev_ir_ops. Can be %NULL 705 * @sensor: pointer to &struct v4l2_subdev_sensor_ops. Can be %NULL 706 * @pad: pointer to &struct v4l2_subdev_pad_ops. Can be %NULL 707 */ 708 struct v4l2_subdev_ops { 709 const struct v4l2_subdev_core_ops *core; 710 const struct v4l2_subdev_tuner_ops *tuner; 711 const struct v4l2_subdev_audio_ops *audio; 712 const struct v4l2_subdev_video_ops *video; 713 const struct v4l2_subdev_vbi_ops *vbi; 714 const struct v4l2_subdev_ir_ops *ir; 715 const struct v4l2_subdev_sensor_ops *sensor; 716 const struct v4l2_subdev_pad_ops *pad; 717 }; 718 719 /** 720 * struct v4l2_subdev_internal_ops - V4L2 subdev internal ops 721 * 722 * @registered: called when this subdev is registered. When called the v4l2_dev 723 * field is set to the correct v4l2_device. 724 * 725 * @unregistered: called when this subdev is unregistered. When called the 726 * v4l2_dev field is still set to the correct v4l2_device. 727 * 728 * @open: called when the subdev device node is opened by an application. 729 * 730 * @close: called when the subdev device node is closed. 731 * 732 * .. note:: 733 * Never call this from drivers, only the v4l2 framework can call 734 * these ops. 735 */ 736 struct v4l2_subdev_internal_ops { 737 int (*registered)(struct v4l2_subdev *sd); 738 void (*unregistered)(struct v4l2_subdev *sd); 739 int (*open)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh); 740 int (*close)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh); 741 }; 742 743 #define V4L2_SUBDEV_NAME_SIZE 32 744 745 /* Set this flag if this subdev is a i2c device. */ 746 #define V4L2_SUBDEV_FL_IS_I2C (1U << 0) 747 /* Set this flag if this subdev is a spi device. */ 748 #define V4L2_SUBDEV_FL_IS_SPI (1U << 1) 749 /* Set this flag if this subdev needs a device node. */ 750 #define V4L2_SUBDEV_FL_HAS_DEVNODE (1U << 2) 751 /* Set this flag if this subdev generates events. */ 752 #define V4L2_SUBDEV_FL_HAS_EVENTS (1U << 3) 753 754 struct regulator_bulk_data; 755 756 /** 757 * struct v4l2_subdev_platform_data - regulators config struct 758 * 759 * @regulators: Optional regulators used to power on/off the subdevice 760 * @num_regulators: Number of regululators 761 * @host_priv: Per-subdevice data, specific for a certain video host device 762 */ 763 struct v4l2_subdev_platform_data { 764 struct regulator_bulk_data *regulators; 765 int num_regulators; 766 767 void *host_priv; 768 }; 769 770 /** 771 * struct v4l2_subdev - describes a V4L2 sub-device 772 * 773 * @entity: pointer to &struct media_entity 774 * @list: List of sub-devices 775 * @owner: The owner is the same as the driver's &struct device owner. 776 * @owner_v4l2_dev: true if the &sd->owner matches the owner of &v4l2_dev->dev 777 * ownner. Initialized by v4l2_device_register_subdev(). 778 * @flags: subdev flags. Can be: 779 * %V4L2_SUBDEV_FL_IS_I2C - Set this flag if this subdev is a i2c device; 780 * %V4L2_SUBDEV_FL_IS_SPI - Set this flag if this subdev is a spi device; 781 * %V4L2_SUBDEV_FL_HAS_DEVNODE - Set this flag if this subdev needs a 782 * device node; 783 * %V4L2_SUBDEV_FL_HAS_EVENTS - Set this flag if this subdev generates 784 * events. 785 * 786 * @v4l2_dev: pointer to &struct v4l2_device 787 * @ops: pointer to &struct v4l2_subdev_ops 788 * @internal_ops: pointer to &struct v4l2_subdev_internal_ops. 789 * Never call these internal ops from within a driver! 790 * @ctrl_handler: The control handler of this subdev. May be NULL. 791 * @name: Name of the sub-device. Please notice that the name must be unique. 792 * @grp_id: can be used to group similar subdevs. Value is driver-specific 793 * @dev_priv: pointer to private data 794 * @host_priv: pointer to private data used by the device where the subdev 795 * is attached. 796 * @devnode: subdev device node 797 * @dev: pointer to the physical device, if any 798 * @of_node: The device_node of the subdev, usually the same as dev->of_node. 799 * @async_list: Links this subdev to a global subdev_list or @notifier->done 800 * list. 801 * @asd: Pointer to respective &struct v4l2_async_subdev. 802 * @notifier: Pointer to the managing notifier. 803 * @pdata: common part of subdevice platform data 804 * 805 * Each instance of a subdev driver should create this struct, either 806 * stand-alone or embedded in a larger struct. 807 * 808 * This structure should be initialized by v4l2_subdev_init() or one of 809 * its variants: v4l2_spi_subdev_init(), v4l2_i2c_subdev_init(). 810 */ 811 struct v4l2_subdev { 812 #if defined(CONFIG_MEDIA_CONTROLLER) 813 struct media_entity entity; 814 #endif 815 struct list_head list; 816 struct module *owner; 817 bool owner_v4l2_dev; 818 u32 flags; 819 struct v4l2_device *v4l2_dev; 820 const struct v4l2_subdev_ops *ops; 821 const struct v4l2_subdev_internal_ops *internal_ops; 822 struct v4l2_ctrl_handler *ctrl_handler; 823 char name[V4L2_SUBDEV_NAME_SIZE]; 824 u32 grp_id; 825 void *dev_priv; 826 void *host_priv; 827 struct video_device *devnode; 828 struct device *dev; 829 struct device_node *of_node; 830 struct list_head async_list; 831 struct v4l2_async_subdev *asd; 832 struct v4l2_async_notifier *notifier; 833 struct v4l2_subdev_platform_data *pdata; 834 }; 835 836 #define media_entity_to_v4l2_subdev(ent) \ 837 container_of(ent, struct v4l2_subdev, entity) 838 #define vdev_to_v4l2_subdev(vdev) \ 839 ((struct v4l2_subdev *)video_get_drvdata(vdev)) 840 841 /** 842 * struct v4l2_subdev_fh - Used for storing subdev information per file handle 843 * 844 * @vfh: pointer to struct v4l2_fh 845 * @pad: pointer to v4l2_subdev_pad_config 846 */ 847 struct v4l2_subdev_fh { 848 struct v4l2_fh vfh; 849 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) 850 struct v4l2_subdev_pad_config *pad; 851 #endif 852 }; 853 854 #define to_v4l2_subdev_fh(fh) \ 855 container_of(fh, struct v4l2_subdev_fh, vfh) 856 857 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) 858 #define __V4L2_SUBDEV_MK_GET_TRY(rtype, fun_name, field_name) \ 859 static inline struct rtype * \ 860 fun_name(struct v4l2_subdev *sd, \ 861 struct v4l2_subdev_pad_config *cfg, \ 862 unsigned int pad) \ 863 { \ 864 BUG_ON(pad >= sd->entity.num_pads); \ 865 return &cfg[pad].field_name; \ 866 } 867 868 __V4L2_SUBDEV_MK_GET_TRY(v4l2_mbus_framefmt, v4l2_subdev_get_try_format, try_fmt) 869 __V4L2_SUBDEV_MK_GET_TRY(v4l2_rect, v4l2_subdev_get_try_crop, try_crop) 870 __V4L2_SUBDEV_MK_GET_TRY(v4l2_rect, v4l2_subdev_get_try_compose, try_compose) 871 #endif 872 873 extern const struct v4l2_file_operations v4l2_subdev_fops; 874 875 /** 876 * v4l2_set_subdevdata - Sets V4L2 dev private device data 877 * 878 * @sd: pointer to &struct v4l2_subdev 879 * @p: pointer to the private device data to be stored. 880 */ 881 static inline void v4l2_set_subdevdata(struct v4l2_subdev *sd, void *p) 882 { 883 sd->dev_priv = p; 884 } 885 886 /** 887 * v4l2_get_subdevdata - Gets V4L2 dev private device data 888 * 889 * @sd: pointer to &struct v4l2_subdev 890 * 891 * Returns the pointer to the private device data to be stored. 892 */ 893 static inline void *v4l2_get_subdevdata(const struct v4l2_subdev *sd) 894 { 895 return sd->dev_priv; 896 } 897 898 /** 899 * v4l2_set_subdevdata - Sets V4L2 dev private host data 900 * 901 * @sd: pointer to &struct v4l2_subdev 902 * @p: pointer to the private data to be stored. 903 */ 904 static inline void v4l2_set_subdev_hostdata(struct v4l2_subdev *sd, void *p) 905 { 906 sd->host_priv = p; 907 } 908 909 /** 910 * v4l2_get_subdevdata - Gets V4L2 dev private data 911 * 912 * @sd: pointer to &struct v4l2_subdev 913 * 914 * Returns the pointer to the private host data to be stored. 915 */ 916 static inline void *v4l2_get_subdev_hostdata(const struct v4l2_subdev *sd) 917 { 918 return sd->host_priv; 919 } 920 921 #ifdef CONFIG_MEDIA_CONTROLLER 922 923 /** 924 * v4l2_subdev_link_validate_default - validates a media link 925 * 926 * @sd: pointer to &struct v4l2_subdev 927 * @link: pointer to &struct media_link 928 * @source_fmt: pointer to &struct v4l2_subdev_format 929 * @sink_fmt: pointer to &struct v4l2_subdev_format 930 * 931 * This function ensures that width, height and the media bus pixel 932 * code are equal on both source and sink of the link. 933 */ 934 int v4l2_subdev_link_validate_default(struct v4l2_subdev *sd, 935 struct media_link *link, 936 struct v4l2_subdev_format *source_fmt, 937 struct v4l2_subdev_format *sink_fmt); 938 939 /** 940 * v4l2_subdev_link_validate - validates a media link 941 * 942 * @link: pointer to &struct media_link 943 * 944 * This function calls the subdev's link_validate ops to validate 945 * if a media link is valid for streaming. It also internally 946 * calls v4l2_subdev_link_validate_default() to ensure that 947 * width, height and the media bus pixel code are equal on both 948 * source and sink of the link. 949 */ 950 int v4l2_subdev_link_validate(struct media_link *link); 951 952 /** 953 * v4l2_subdev_alloc_pad_config - Allocates memory for pad config 954 * 955 * @sd: pointer to struct v4l2_subdev 956 */ 957 struct 958 v4l2_subdev_pad_config *v4l2_subdev_alloc_pad_config(struct v4l2_subdev *sd); 959 960 /** 961 * v4l2_subdev_free_pad_config - Frees memory allocated by 962 * v4l2_subdev_alloc_pad_config(). 963 * 964 * @cfg: pointer to &struct v4l2_subdev_pad_config 965 */ 966 void v4l2_subdev_free_pad_config(struct v4l2_subdev_pad_config *cfg); 967 #endif /* CONFIG_MEDIA_CONTROLLER */ 968 969 /** 970 * v4l2_subdev_init - initializes the sub-device struct 971 * 972 * @sd: pointer to the &struct v4l2_subdev to be initialized 973 * @ops: pointer to &struct v4l2_subdev_ops. 974 */ 975 void v4l2_subdev_init(struct v4l2_subdev *sd, 976 const struct v4l2_subdev_ops *ops); 977 978 /* 979 * Call an ops of a v4l2_subdev, doing the right checks against 980 * NULL pointers. 981 * 982 * Example: err = v4l2_subdev_call(sd, video, s_std, norm); 983 */ 984 #define v4l2_subdev_call(sd, o, f, args...) \ 985 (!(sd) ? -ENODEV : (((sd)->ops->o && (sd)->ops->o->f) ? \ 986 (sd)->ops->o->f((sd), ##args) : -ENOIOCTLCMD)) 987 988 #define v4l2_subdev_has_op(sd, o, f) \ 989 ((sd)->ops->o && (sd)->ops->o->f) 990 991 /** 992 * v4l2_subdev_notify_event() - Delivers event notification for subdevice 993 * @sd: The subdev for which to deliver the event 994 * @ev: The event to deliver 995 * 996 * Will deliver the specified event to all userspace event listeners which are 997 * subscribed to the v42l subdev event queue as well as to the bridge driver 998 * using the notify callback. The notification type for the notify callback 999 * will be %V4L2_DEVICE_NOTIFY_EVENT. 1000 */ 1001 void v4l2_subdev_notify_event(struct v4l2_subdev *sd, 1002 const struct v4l2_event *ev); 1003 1004 #endif 1005