2 V4L2 sub-device support header.
4 Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl>
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.
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.
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18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #ifndef _V4L2_SUBDEV_H
22 #define _V4L2_SUBDEV_H
24 #include <linux/types.h>
25 #include <linux/v4l2-subdev.h>
26 #include <media/media-entity.h>
27 #include <media/v4l2-async.h>
28 #include <media/v4l2-common.h>
29 #include <media/v4l2-dev.h>
30 #include <media/v4l2-fh.h>
31 #include <media/v4l2-mediabus.h>
33 /* generic v4l2_device notify callback notification values */
34 #define V4L2_SUBDEV_IR_RX_NOTIFY _IOW('v', 0, u32)
35 #define V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ 0x00000001
36 #define V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED 0x00000002
37 #define V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN 0x00000004
38 #define V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN 0x00000008
40 #define V4L2_SUBDEV_IR_TX_NOTIFY _IOW('v', 1, u32)
41 #define V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ 0x00000001
44 struct v4l2_ctrl_handler;
45 struct v4l2_event_subscription;
48 struct v4l2_subdev_fh;
50 struct v4l2_mbus_frame_desc;
53 struct v4l2_decode_vbi_line {
54 u32 is_second_field; /* Set to 0 for the first (odd) field,
55 set to 1 for the second (even) field. */
56 u8 *p; /* Pointer to the sliced VBI data from the decoder.
57 On exit points to the start of the payload. */
58 u32 line; /* Line number of the sliced VBI data (1-23) */
59 u32 type; /* VBI service type (V4L2_SLICED_*). 0 if no service found */
62 /* Sub-devices are devices that are connected somehow to the main bridge
63 device. These devices are usually audio/video muxers/encoders/decoders or
64 sensors and webcam controllers.
66 Usually these devices are controlled through an i2c bus, but other busses
69 The v4l2_subdev struct provides a way of accessing these devices in a
70 generic manner. Most operations that these sub-devices support fall in
71 a few categories: core ops, audio ops, video ops and tuner ops.
73 More categories can be added if needed, although this should remain a
74 limited set (no more than approx. 8 categories).
76 Each category has its own set of ops that subdev drivers can implement.
78 A subdev driver can leave the pointer to the category ops NULL if
79 it does not implement them (e.g. an audio subdev will generally not
80 implement the video category ops). The exception is the core category:
81 this must always be present.
83 These ops are all used internally so it is no problem to change, remove
84 or add ops or move ops from one to another category. Currently these
85 ops are based on the original ioctls, but since ops are not limited to
86 one argument there is room for improvement here once all i2c subdev
87 drivers are converted to use these ops.
90 /* Core ops: it is highly recommended to implement at least these ops:
96 This provides basic debugging support.
98 The ioctl ops is meant for generic ioctl-like commands. Depending on
99 the use-case it might be better to use subdev-specific ops (currently
100 not yet implemented) since ops provide proper type-checking.
103 /* Subdevice external IO pin configuration */
104 #define V4L2_SUBDEV_IO_PIN_DISABLE (1 << 0) /* ENABLE assumed */
105 #define V4L2_SUBDEV_IO_PIN_OUTPUT (1 << 1)
106 #define V4L2_SUBDEV_IO_PIN_INPUT (1 << 2)
107 #define V4L2_SUBDEV_IO_PIN_SET_VALUE (1 << 3) /* Set output value */
108 #define V4L2_SUBDEV_IO_PIN_ACTIVE_LOW (1 << 4) /* ACTIVE HIGH assumed */
110 struct v4l2_subdev_io_pin_config {
111 u32 flags; /* V4L2_SUBDEV_IO_PIN_* flags for this pin's config */
112 u8 pin; /* Chip external IO pin to configure */
113 u8 function; /* Internal signal pad/function to route to IO pin */
114 u8 value; /* Initial value for pin - e.g. GPIO output value */
115 u8 strength; /* Pin drive strength */
119 s_io_pin_config: configure one or more chip I/O pins for chips that
120 multiplex different internal signal pads out to IO pins. This function
121 takes a pointer to an array of 'n' pin configuration entries, one for
122 each pin being configured. This function could be called at times
123 other than just subdevice initialization.
125 init: initialize the sensor registers to some sort of reasonable default
126 values. Do not use for new drivers and should be removed in existing
129 load_fw: load firmware.
131 reset: generic reset command. The argument selects which subsystems to
132 reset. Passing 0 will always reset the whole chip. Do not use for new
133 drivers without discussing this first on the linux-media mailinglist.
134 There should be no reason normally to reset a device.
136 s_gpio: set GPIO pins. Very simple right now, might need to be extended with
137 a direction argument if needed.
139 s_power: puts subdevice in power saving mode (on == 0) or normal operation
142 interrupt_service_routine: Called by the bridge chip's interrupt service
143 handler, when an interrupt status has be raised due to this subdev,
144 so that this subdev can handle the details. It may schedule work to be
145 performed later. It must not sleep. *Called from an IRQ context*.
147 struct v4l2_subdev_core_ops {
148 int (*log_status)(struct v4l2_subdev *sd);
149 int (*s_io_pin_config)(struct v4l2_subdev *sd, size_t n,
150 struct v4l2_subdev_io_pin_config *pincfg);
151 int (*init)(struct v4l2_subdev *sd, u32 val);
152 int (*load_fw)(struct v4l2_subdev *sd);
153 int (*reset)(struct v4l2_subdev *sd, u32 val);
154 int (*s_gpio)(struct v4l2_subdev *sd, u32 val);
155 int (*queryctrl)(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc);
156 int (*g_ctrl)(struct v4l2_subdev *sd, struct v4l2_control *ctrl);
157 int (*s_ctrl)(struct v4l2_subdev *sd, struct v4l2_control *ctrl);
158 int (*g_ext_ctrls)(struct v4l2_subdev *sd, struct v4l2_ext_controls *ctrls);
159 int (*s_ext_ctrls)(struct v4l2_subdev *sd, struct v4l2_ext_controls *ctrls);
160 int (*try_ext_ctrls)(struct v4l2_subdev *sd, struct v4l2_ext_controls *ctrls);
161 int (*querymenu)(struct v4l2_subdev *sd, struct v4l2_querymenu *qm);
162 int (*g_std)(struct v4l2_subdev *sd, v4l2_std_id *norm);
163 int (*s_std)(struct v4l2_subdev *sd, v4l2_std_id norm);
164 long (*ioctl)(struct v4l2_subdev *sd, unsigned int cmd, void *arg);
165 #ifdef CONFIG_VIDEO_ADV_DEBUG
166 int (*g_register)(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg);
167 int (*s_register)(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg);
169 int (*s_power)(struct v4l2_subdev *sd, int on);
170 int (*interrupt_service_routine)(struct v4l2_subdev *sd,
171 u32 status, bool *handled);
172 int (*subscribe_event)(struct v4l2_subdev *sd, struct v4l2_fh *fh,
173 struct v4l2_event_subscription *sub);
174 int (*unsubscribe_event)(struct v4l2_subdev *sd, struct v4l2_fh *fh,
175 struct v4l2_event_subscription *sub);
178 /* s_radio: v4l device was opened in radio mode.
180 g_frequency: freq->type must be filled in. Normally done by video_ioctl2
181 or the bridge driver.
184 s_tuner: vt->type must be filled in. Normally done by video_ioctl2 or the
187 s_type_addr: sets tuner type and its I2C addr.
189 s_config: sets tda9887 specific stuff, like port1, port2 and qss
191 struct v4l2_subdev_tuner_ops {
192 int (*s_radio)(struct v4l2_subdev *sd);
193 int (*s_frequency)(struct v4l2_subdev *sd, const struct v4l2_frequency *freq);
194 int (*g_frequency)(struct v4l2_subdev *sd, struct v4l2_frequency *freq);
195 int (*g_tuner)(struct v4l2_subdev *sd, struct v4l2_tuner *vt);
196 int (*s_tuner)(struct v4l2_subdev *sd, const struct v4l2_tuner *vt);
197 int (*g_modulator)(struct v4l2_subdev *sd, struct v4l2_modulator *vm);
198 int (*s_modulator)(struct v4l2_subdev *sd, const struct v4l2_modulator *vm);
199 int (*s_type_addr)(struct v4l2_subdev *sd, struct tuner_setup *type);
200 int (*s_config)(struct v4l2_subdev *sd, const struct v4l2_priv_tun_config *config);
203 /* s_clock_freq: set the frequency (in Hz) of the audio clock output.
204 Used to slave an audio processor to the video decoder, ensuring that
205 audio and video remain synchronized. Usual values for the frequency
206 are 48000, 44100 or 32000 Hz. If the frequency is not supported, then
209 s_i2s_clock_freq: sets I2S speed in bps. This is used to provide a standard
210 way to select I2S clock used by driving digital audio streams at some
211 board designs. Usual values for the frequency are 1024000 and 2048000.
212 If the frequency is not supported, then -EINVAL is returned.
214 s_routing: used to define the input and/or output pins of an audio chip,
215 and any additional configuration data.
216 Never attempt to use user-level input IDs (e.g. Composite, S-Video,
217 Tuner) at this level. An i2c device shouldn't know about whether an
218 input pin is connected to a Composite connector, become on another
219 board or platform it might be connected to something else entirely.
220 The calling driver is responsible for mapping a user-level input to
221 the right pins on the i2c device.
223 struct v4l2_subdev_audio_ops {
224 int (*s_clock_freq)(struct v4l2_subdev *sd, u32 freq);
225 int (*s_i2s_clock_freq)(struct v4l2_subdev *sd, u32 freq);
226 int (*s_routing)(struct v4l2_subdev *sd, u32 input, u32 output, u32 config);
227 int (*s_stream)(struct v4l2_subdev *sd, int enable);
230 /* Indicates the @length field specifies maximum data length. */
231 #define V4L2_MBUS_FRAME_DESC_FL_LEN_MAX (1U << 0)
232 /* Indicates user defined data format, i.e. non standard frame format. */
233 #define V4L2_MBUS_FRAME_DESC_FL_BLOB (1U << 1)
236 * struct v4l2_mbus_frame_desc_entry - media bus frame description structure
237 * @flags: V4L2_MBUS_FRAME_DESC_FL_* flags
238 * @pixelcode: media bus pixel code, valid if FRAME_DESC_FL_BLOB is not set
239 * @length: number of octets per frame, valid for compressed or unspecified
242 struct v4l2_mbus_frame_desc_entry {
248 #define V4L2_FRAME_DESC_ENTRY_MAX 4
251 * struct v4l2_mbus_frame_desc - media bus data frame description
252 * @entry: frame descriptors array
253 * @num_entries: number of entries in @entry array
255 struct v4l2_mbus_frame_desc {
256 struct v4l2_mbus_frame_desc_entry entry[V4L2_FRAME_DESC_ENTRY_MAX];
257 unsigned short num_entries;
261 s_std_output: set v4l2_std_id for video OUTPUT devices. This is ignored by
264 g_std_output: get current standard for video OUTPUT devices. This is ignored
265 by video input devices.
267 g_tvnorms_output: get v4l2_std_id with all standards supported by video
268 OUTPUT device. This is ignored by video input devices.
270 s_crystal_freq: sets the frequency of the crystal used to generate the
271 clocks in Hz. An extra flags field allows device specific configuration
272 regarding clock frequency dividers, etc. If not used, then set flags
273 to 0. If the frequency is not supported, then -EINVAL is returned.
275 g_input_status: get input status. Same as the status field in the v4l2_input
278 s_routing: see s_routing in audio_ops, except this version is for video
281 s_dv_timings(): Set custom dv timings in the sub device. This is used
282 when sub device is capable of setting detailed timing information
283 in the hardware to generate/detect the video signal.
285 g_dv_timings(): Get custom dv timings in the sub device.
287 enum_mbus_fmt: enumerate pixel formats, provided by a video data source
289 g_mbus_fmt: get the current pixel format, provided by a video data source
291 try_mbus_fmt: try to set a pixel format on a video data source
293 s_mbus_fmt: set a pixel format on a video data source
295 g_mbus_config: get supported mediabus configurations
297 s_mbus_config: set a certain mediabus configuration. This operation is added
298 for compatibility with soc-camera drivers and should not be used by new
301 s_rx_buffer: set a host allocated memory buffer for the subdev. The subdev
302 can adjust @size to a lower value and must not write more data to the
303 buffer starting at @data than the original value of @size.
305 struct v4l2_subdev_video_ops {
306 int (*s_routing)(struct v4l2_subdev *sd, u32 input, u32 output, u32 config);
307 int (*s_crystal_freq)(struct v4l2_subdev *sd, u32 freq, u32 flags);
308 int (*s_std_output)(struct v4l2_subdev *sd, v4l2_std_id std);
309 int (*g_std_output)(struct v4l2_subdev *sd, v4l2_std_id *std);
310 int (*querystd)(struct v4l2_subdev *sd, v4l2_std_id *std);
311 int (*g_tvnorms_output)(struct v4l2_subdev *sd, v4l2_std_id *std);
312 int (*g_input_status)(struct v4l2_subdev *sd, u32 *status);
313 int (*s_stream)(struct v4l2_subdev *sd, int enable);
314 int (*cropcap)(struct v4l2_subdev *sd, struct v4l2_cropcap *cc);
315 int (*g_crop)(struct v4l2_subdev *sd, struct v4l2_crop *crop);
316 int (*s_crop)(struct v4l2_subdev *sd, const struct v4l2_crop *crop);
317 int (*g_parm)(struct v4l2_subdev *sd, struct v4l2_streamparm *param);
318 int (*s_parm)(struct v4l2_subdev *sd, struct v4l2_streamparm *param);
319 int (*g_frame_interval)(struct v4l2_subdev *sd,
320 struct v4l2_subdev_frame_interval *interval);
321 int (*s_frame_interval)(struct v4l2_subdev *sd,
322 struct v4l2_subdev_frame_interval *interval);
323 int (*enum_framesizes)(struct v4l2_subdev *sd, struct v4l2_frmsizeenum *fsize);
324 int (*enum_frameintervals)(struct v4l2_subdev *sd, struct v4l2_frmivalenum *fival);
325 int (*s_dv_timings)(struct v4l2_subdev *sd,
326 struct v4l2_dv_timings *timings);
327 int (*g_dv_timings)(struct v4l2_subdev *sd,
328 struct v4l2_dv_timings *timings);
329 int (*enum_dv_timings)(struct v4l2_subdev *sd,
330 struct v4l2_enum_dv_timings *timings);
331 int (*query_dv_timings)(struct v4l2_subdev *sd,
332 struct v4l2_dv_timings *timings);
333 int (*dv_timings_cap)(struct v4l2_subdev *sd,
334 struct v4l2_dv_timings_cap *cap);
335 int (*enum_mbus_fmt)(struct v4l2_subdev *sd, unsigned int index,
336 enum v4l2_mbus_pixelcode *code);
337 int (*enum_mbus_fsizes)(struct v4l2_subdev *sd,
338 struct v4l2_frmsizeenum *fsize);
339 int (*g_mbus_fmt)(struct v4l2_subdev *sd,
340 struct v4l2_mbus_framefmt *fmt);
341 int (*try_mbus_fmt)(struct v4l2_subdev *sd,
342 struct v4l2_mbus_framefmt *fmt);
343 int (*s_mbus_fmt)(struct v4l2_subdev *sd,
344 struct v4l2_mbus_framefmt *fmt);
345 int (*g_mbus_config)(struct v4l2_subdev *sd,
346 struct v4l2_mbus_config *cfg);
347 int (*s_mbus_config)(struct v4l2_subdev *sd,
348 const struct v4l2_mbus_config *cfg);
349 int (*s_rx_buffer)(struct v4l2_subdev *sd, void *buf,
354 decode_vbi_line: video decoders that support sliced VBI need to implement
355 this ioctl. Field p of the v4l2_sliced_vbi_line struct is set to the
356 start of the VBI data that was generated by the decoder. The driver
357 then parses the sliced VBI data and sets the other fields in the
358 struct accordingly. The pointer p is updated to point to the start of
359 the payload which can be copied verbatim into the data field of the
360 v4l2_sliced_vbi_data struct. If no valid VBI data was found, then the
361 type field is set to 0 on return.
363 s_vbi_data: used to generate VBI signals on a video signal.
364 v4l2_sliced_vbi_data is filled with the data packets that should be
365 output. Note that if you set the line field to 0, then that VBI signal
366 is disabled. If no valid VBI data was found, then the type field is
369 g_vbi_data: used to obtain the sliced VBI packet from a readback register.
370 Not all video decoders support this. If no data is available because
371 the readback register contains invalid or erroneous data -EIO is
372 returned. Note that you must fill in the 'id' member and the 'field'
373 member (to determine whether CC data from the first or second field
376 s_raw_fmt: setup the video encoder/decoder for raw VBI.
378 g_sliced_fmt: retrieve the current sliced VBI settings.
380 s_sliced_fmt: setup the sliced VBI settings.
382 struct v4l2_subdev_vbi_ops {
383 int (*decode_vbi_line)(struct v4l2_subdev *sd, struct v4l2_decode_vbi_line *vbi_line);
384 int (*s_vbi_data)(struct v4l2_subdev *sd, const struct v4l2_sliced_vbi_data *vbi_data);
385 int (*g_vbi_data)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_data *vbi_data);
386 int (*g_sliced_vbi_cap)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_cap *cap);
387 int (*s_raw_fmt)(struct v4l2_subdev *sd, struct v4l2_vbi_format *fmt);
388 int (*g_sliced_fmt)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_format *fmt);
389 int (*s_sliced_fmt)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_format *fmt);
393 * struct v4l2_subdev_sensor_ops - v4l2-subdev sensor operations
394 * @g_skip_top_lines: number of lines at the top of the image to be skipped.
395 * This is needed for some sensors, which always corrupt
396 * several top lines of the output image, or which send their
398 * @g_skip_frames: number of frames to skip at stream start. This is needed for
399 * buggy sensors that generate faulty frames when they are
402 struct v4l2_subdev_sensor_ops {
403 int (*g_skip_top_lines)(struct v4l2_subdev *sd, u32 *lines);
404 int (*g_skip_frames)(struct v4l2_subdev *sd, u32 *frames);
408 [rt]x_g_parameters: Get the current operating parameters and state of the
409 the IR receiver or transmitter.
411 [rt]x_s_parameters: Set the current operating parameters and state of the
412 the IR receiver or transmitter. It is recommended to call
413 [rt]x_g_parameters first to fill out the current state, and only change
414 the fields that need to be changed. Upon return, the actual device
415 operating parameters and state will be returned. Note that hardware
416 limitations may prevent the actual settings from matching the requested
417 settings - e.g. an actual carrier setting of 35,904 Hz when 36,000 Hz
418 was requested. An exception is when the shutdown parameter is true.
419 The last used operational parameters will be returned, but the actual
420 state of the hardware be different to minimize power consumption and
421 processing when shutdown is true.
423 rx_read: Reads received codes or pulse width data.
424 The semantics are similar to a non-blocking read() call.
426 tx_write: Writes codes or pulse width data for transmission.
427 The semantics are similar to a non-blocking write() call.
430 enum v4l2_subdev_ir_mode {
431 V4L2_SUBDEV_IR_MODE_PULSE_WIDTH, /* uses struct ir_raw_event records */
434 struct v4l2_subdev_ir_parameters {
435 /* Either Rx or Tx */
436 unsigned int bytes_per_data_element; /* of data in read or write call */
437 enum v4l2_subdev_ir_mode mode;
440 bool interrupt_enable;
441 bool shutdown; /* true: set hardware to low/no power, false: normal */
443 bool modulation; /* true: uses carrier, false: baseband */
444 u32 max_pulse_width; /* ns, valid only for baseband signal */
445 unsigned int carrier_freq; /* Hz, valid only for modulated signal*/
446 unsigned int duty_cycle; /* percent, valid only for modulated signal*/
447 bool invert_level; /* invert signal level */
450 bool invert_carrier_sense; /* Send 0/space as a carrier burst */
453 u32 noise_filter_min_width; /* ns, min time of a valid pulse */
454 unsigned int carrier_range_lower; /* Hz, valid only for modulated sig */
455 unsigned int carrier_range_upper; /* Hz, valid only for modulated sig */
456 u32 resolution; /* ns */
459 struct v4l2_subdev_ir_ops {
461 int (*rx_read)(struct v4l2_subdev *sd, u8 *buf, size_t count,
464 int (*rx_g_parameters)(struct v4l2_subdev *sd,
465 struct v4l2_subdev_ir_parameters *params);
466 int (*rx_s_parameters)(struct v4l2_subdev *sd,
467 struct v4l2_subdev_ir_parameters *params);
470 int (*tx_write)(struct v4l2_subdev *sd, u8 *buf, size_t count,
473 int (*tx_g_parameters)(struct v4l2_subdev *sd,
474 struct v4l2_subdev_ir_parameters *params);
475 int (*tx_s_parameters)(struct v4l2_subdev *sd,
476 struct v4l2_subdev_ir_parameters *params);
480 * struct v4l2_subdev_pad_ops - v4l2-subdev pad level operations
481 * @get_frame_desc: get the current low level media bus frame parameters.
482 * @get_frame_desc: set the low level media bus frame parameters, @fd array
483 * may be adjusted by the subdev driver to device capabilities.
485 struct v4l2_subdev_pad_ops {
486 int (*enum_mbus_code)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
487 struct v4l2_subdev_mbus_code_enum *code);
488 int (*enum_frame_size)(struct v4l2_subdev *sd,
489 struct v4l2_subdev_fh *fh,
490 struct v4l2_subdev_frame_size_enum *fse);
491 int (*enum_frame_interval)(struct v4l2_subdev *sd,
492 struct v4l2_subdev_fh *fh,
493 struct v4l2_subdev_frame_interval_enum *fie);
494 int (*get_fmt)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
495 struct v4l2_subdev_format *format);
496 int (*set_fmt)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
497 struct v4l2_subdev_format *format);
498 int (*set_crop)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
499 struct v4l2_subdev_crop *crop);
500 int (*get_crop)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
501 struct v4l2_subdev_crop *crop);
502 int (*get_selection)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
503 struct v4l2_subdev_selection *sel);
504 int (*set_selection)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
505 struct v4l2_subdev_selection *sel);
506 int (*get_edid)(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid);
507 int (*set_edid)(struct v4l2_subdev *sd, struct v4l2_subdev_edid *edid);
508 #ifdef CONFIG_MEDIA_CONTROLLER
509 int (*link_validate)(struct v4l2_subdev *sd, struct media_link *link,
510 struct v4l2_subdev_format *source_fmt,
511 struct v4l2_subdev_format *sink_fmt);
512 #endif /* CONFIG_MEDIA_CONTROLLER */
513 int (*get_frame_desc)(struct v4l2_subdev *sd, unsigned int pad,
514 struct v4l2_mbus_frame_desc *fd);
515 int (*set_frame_desc)(struct v4l2_subdev *sd, unsigned int pad,
516 struct v4l2_mbus_frame_desc *fd);
519 struct v4l2_subdev_ops {
520 const struct v4l2_subdev_core_ops *core;
521 const struct v4l2_subdev_tuner_ops *tuner;
522 const struct v4l2_subdev_audio_ops *audio;
523 const struct v4l2_subdev_video_ops *video;
524 const struct v4l2_subdev_vbi_ops *vbi;
525 const struct v4l2_subdev_ir_ops *ir;
526 const struct v4l2_subdev_sensor_ops *sensor;
527 const struct v4l2_subdev_pad_ops *pad;
531 * Internal ops. Never call this from drivers, only the v4l2 framework can call
534 * registered: called when this subdev is registered. When called the v4l2_dev
535 * field is set to the correct v4l2_device.
537 * unregistered: called when this subdev is unregistered. When called the
538 * v4l2_dev field is still set to the correct v4l2_device.
540 * open: called when the subdev device node is opened by an application.
542 * close: called when the subdev device node is closed.
544 struct v4l2_subdev_internal_ops {
545 int (*registered)(struct v4l2_subdev *sd);
546 void (*unregistered)(struct v4l2_subdev *sd);
547 int (*open)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh);
548 int (*close)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh);
551 #define V4L2_SUBDEV_NAME_SIZE 32
553 /* Set this flag if this subdev is a i2c device. */
554 #define V4L2_SUBDEV_FL_IS_I2C (1U << 0)
555 /* Set this flag if this subdev is a spi device. */
556 #define V4L2_SUBDEV_FL_IS_SPI (1U << 1)
557 /* Set this flag if this subdev needs a device node. */
558 #define V4L2_SUBDEV_FL_HAS_DEVNODE (1U << 2)
559 /* Set this flag if this subdev generates events. */
560 #define V4L2_SUBDEV_FL_HAS_EVENTS (1U << 3)
562 /* Each instance of a subdev driver should create this struct, either
563 stand-alone or embedded in a larger struct.
566 #if defined(CONFIG_MEDIA_CONTROLLER)
567 struct media_entity entity;
569 struct list_head list;
570 struct module *owner;
572 struct v4l2_device *v4l2_dev;
573 const struct v4l2_subdev_ops *ops;
574 /* Never call these internal ops from within a driver! */
575 const struct v4l2_subdev_internal_ops *internal_ops;
576 /* The control handler of this subdev. May be NULL. */
577 struct v4l2_ctrl_handler *ctrl_handler;
578 /* name must be unique */
579 char name[V4L2_SUBDEV_NAME_SIZE];
580 /* can be used to group similar subdevs, value is driver-specific */
582 /* pointer to private data */
585 /* subdev device node */
586 struct video_device *devnode;
587 /* pointer to the physical device, if any */
589 struct v4l2_async_subdev_list asdl;
592 static inline struct v4l2_subdev *v4l2_async_to_subdev(
593 struct v4l2_async_subdev_list *asdl)
595 return container_of(asdl, struct v4l2_subdev, asdl);
598 #define media_entity_to_v4l2_subdev(ent) \
599 container_of(ent, struct v4l2_subdev, entity)
600 #define vdev_to_v4l2_subdev(vdev) \
601 ((struct v4l2_subdev *)video_get_drvdata(vdev))
604 * Used for storing subdev information per file handle
606 struct v4l2_subdev_fh {
608 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
610 struct v4l2_mbus_framefmt try_fmt;
611 struct v4l2_rect try_crop;
612 struct v4l2_rect try_compose;
617 #define to_v4l2_subdev_fh(fh) \
618 container_of(fh, struct v4l2_subdev_fh, vfh)
620 #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
621 #define __V4L2_SUBDEV_MK_GET_TRY(rtype, fun_name, field_name) \
622 static inline struct rtype * \
623 v4l2_subdev_get_try_##fun_name(struct v4l2_subdev_fh *fh, \
626 BUG_ON(unlikely(pad >= vdev_to_v4l2_subdev( \
627 fh->vfh.vdev)->entity.num_pads)); \
628 return &fh->pad[pad].field_name; \
631 __V4L2_SUBDEV_MK_GET_TRY(v4l2_mbus_framefmt, format, try_fmt)
632 __V4L2_SUBDEV_MK_GET_TRY(v4l2_rect, crop, try_compose)
633 __V4L2_SUBDEV_MK_GET_TRY(v4l2_rect, compose, try_compose)
636 extern const struct v4l2_file_operations v4l2_subdev_fops;
638 static inline void v4l2_set_subdevdata(struct v4l2_subdev *sd, void *p)
643 static inline void *v4l2_get_subdevdata(const struct v4l2_subdev *sd)
648 static inline void v4l2_set_subdev_hostdata(struct v4l2_subdev *sd, void *p)
653 static inline void *v4l2_get_subdev_hostdata(const struct v4l2_subdev *sd)
655 return sd->host_priv;
658 #ifdef CONFIG_MEDIA_CONTROLLER
659 int v4l2_subdev_link_validate_default(struct v4l2_subdev *sd,
660 struct media_link *link,
661 struct v4l2_subdev_format *source_fmt,
662 struct v4l2_subdev_format *sink_fmt);
663 int v4l2_subdev_link_validate(struct media_link *link);
664 #endif /* CONFIG_MEDIA_CONTROLLER */
665 void v4l2_subdev_init(struct v4l2_subdev *sd,
666 const struct v4l2_subdev_ops *ops);
668 /* Call an ops of a v4l2_subdev, doing the right checks against
671 Example: err = v4l2_subdev_call(sd, core, s_std, norm);
673 #define v4l2_subdev_call(sd, o, f, args...) \
674 (!(sd) ? -ENODEV : (((sd)->ops->o && (sd)->ops->o->f) ? \
675 (sd)->ops->o->f((sd) , ##args) : -ENOIOCTLCMD))
677 /* Send a notification to v4l2_device. */
678 #define v4l2_subdev_notify(sd, notification, arg) \
679 ((!(sd) || !(sd)->v4l2_dev || !(sd)->v4l2_dev->notify) ? -ENODEV : \
680 (sd)->v4l2_dev->notify((sd), (notification), (arg)))
682 #define v4l2_subdev_has_op(sd, o, f) \
683 ((sd)->ops->o && (sd)->ops->o->f)