Root/
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 registors 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, 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, 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 | #ifdef CONFIG_MEDIA_CONTROLLER |
480 | int (*link_validate)(struct v4l2_subdev *sd, struct media_link *link, |
481 | struct v4l2_subdev_format *source_fmt, |
482 | struct v4l2_subdev_format *sink_fmt); |
483 | #endif /* CONFIG_MEDIA_CONTROLLER */ |
484 | }; |
485 | |
486 | struct v4l2_subdev_ops { |
487 | const struct v4l2_subdev_core_ops *core; |
488 | const struct v4l2_subdev_tuner_ops *tuner; |
489 | const struct v4l2_subdev_audio_ops *audio; |
490 | const struct v4l2_subdev_video_ops *video; |
491 | const struct v4l2_subdev_vbi_ops *vbi; |
492 | const struct v4l2_subdev_ir_ops *ir; |
493 | const struct v4l2_subdev_sensor_ops *sensor; |
494 | const struct v4l2_subdev_pad_ops *pad; |
495 | }; |
496 | |
497 | /* |
498 | * Internal ops. Never call this from drivers, only the v4l2 framework can call |
499 | * these ops. |
500 | * |
501 | * registered: called when this subdev is registered. When called the v4l2_dev |
502 | * field is set to the correct v4l2_device. |
503 | * |
504 | * unregistered: called when this subdev is unregistered. When called the |
505 | * v4l2_dev field is still set to the correct v4l2_device. |
506 | * |
507 | * open: called when the subdev device node is opened by an application. |
508 | * |
509 | * close: called when the subdev device node is closed. |
510 | */ |
511 | struct v4l2_subdev_internal_ops { |
512 | int (*registered)(struct v4l2_subdev *sd); |
513 | void (*unregistered)(struct v4l2_subdev *sd); |
514 | int (*open)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh); |
515 | int (*close)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh); |
516 | }; |
517 | |
518 | #define V4L2_SUBDEV_NAME_SIZE 32 |
519 | |
520 | /* Set this flag if this subdev is a i2c device. */ |
521 | #define V4L2_SUBDEV_FL_IS_I2C (1U << 0) |
522 | /* Set this flag if this subdev is a spi device. */ |
523 | #define V4L2_SUBDEV_FL_IS_SPI (1U << 1) |
524 | /* Set this flag if this subdev needs a device node. */ |
525 | #define V4L2_SUBDEV_FL_HAS_DEVNODE (1U << 2) |
526 | /* Set this flag if this subdev generates events. */ |
527 | #define V4L2_SUBDEV_FL_HAS_EVENTS (1U << 3) |
528 | |
529 | /* Each instance of a subdev driver should create this struct, either |
530 | stand-alone or embedded in a larger struct. |
531 | */ |
532 | struct v4l2_subdev { |
533 | #if defined(CONFIG_MEDIA_CONTROLLER) |
534 | struct media_entity entity; |
535 | #endif |
536 | struct list_head list; |
537 | struct module *owner; |
538 | u32 flags; |
539 | struct v4l2_device *v4l2_dev; |
540 | const struct v4l2_subdev_ops *ops; |
541 | /* Never call these internal ops from within a driver! */ |
542 | const struct v4l2_subdev_internal_ops *internal_ops; |
543 | /* The control handler of this subdev. May be NULL. */ |
544 | struct v4l2_ctrl_handler *ctrl_handler; |
545 | /* name must be unique */ |
546 | char name[V4L2_SUBDEV_NAME_SIZE]; |
547 | /* can be used to group similar subdevs, value is driver-specific */ |
548 | u32 grp_id; |
549 | /* pointer to private data */ |
550 | void *dev_priv; |
551 | void *host_priv; |
552 | /* subdev device node */ |
553 | struct video_device *devnode; |
554 | }; |
555 | |
556 | #define media_entity_to_v4l2_subdev(ent) \ |
557 | container_of(ent, struct v4l2_subdev, entity) |
558 | #define vdev_to_v4l2_subdev(vdev) \ |
559 | ((struct v4l2_subdev *)video_get_drvdata(vdev)) |
560 | |
561 | /* |
562 | * Used for storing subdev information per file handle |
563 | */ |
564 | struct v4l2_subdev_fh { |
565 | struct v4l2_fh vfh; |
566 | #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) |
567 | struct { |
568 | struct v4l2_mbus_framefmt try_fmt; |
569 | struct v4l2_rect try_crop; |
570 | struct v4l2_rect try_compose; |
571 | } *pad; |
572 | #endif |
573 | }; |
574 | |
575 | #define to_v4l2_subdev_fh(fh) \ |
576 | container_of(fh, struct v4l2_subdev_fh, vfh) |
577 | |
578 | #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) |
579 | #define __V4L2_SUBDEV_MK_GET_TRY(rtype, fun_name, field_name) \ |
580 | static inline struct rtype * \ |
581 | v4l2_subdev_get_try_##fun_name(struct v4l2_subdev_fh *fh, \ |
582 | unsigned int pad) \ |
583 | { \ |
584 | BUG_ON(unlikely(pad >= vdev_to_v4l2_subdev( \ |
585 | fh->vfh.vdev)->entity.num_pads)); \ |
586 | return &fh->pad[pad].field_name; \ |
587 | } |
588 | |
589 | __V4L2_SUBDEV_MK_GET_TRY(v4l2_mbus_framefmt, format, try_fmt) |
590 | __V4L2_SUBDEV_MK_GET_TRY(v4l2_rect, crop, try_compose) |
591 | __V4L2_SUBDEV_MK_GET_TRY(v4l2_rect, compose, try_compose) |
592 | #endif |
593 | |
594 | extern const struct v4l2_file_operations v4l2_subdev_fops; |
595 | |
596 | static inline void v4l2_set_subdevdata(struct v4l2_subdev *sd, void *p) |
597 | { |
598 | sd->dev_priv = p; |
599 | } |
600 | |
601 | static inline void *v4l2_get_subdevdata(const struct v4l2_subdev *sd) |
602 | { |
603 | return sd->dev_priv; |
604 | } |
605 | |
606 | static inline void v4l2_set_subdev_hostdata(struct v4l2_subdev *sd, void *p) |
607 | { |
608 | sd->host_priv = p; |
609 | } |
610 | |
611 | static inline void *v4l2_get_subdev_hostdata(const struct v4l2_subdev *sd) |
612 | { |
613 | return sd->host_priv; |
614 | } |
615 | |
616 | #ifdef CONFIG_MEDIA_CONTROLLER |
617 | int v4l2_subdev_link_validate_default(struct v4l2_subdev *sd, |
618 | struct media_link *link, |
619 | struct v4l2_subdev_format *source_fmt, |
620 | struct v4l2_subdev_format *sink_fmt); |
621 | int v4l2_subdev_link_validate(struct media_link *link); |
622 | #endif /* CONFIG_MEDIA_CONTROLLER */ |
623 | void v4l2_subdev_init(struct v4l2_subdev *sd, |
624 | const struct v4l2_subdev_ops *ops); |
625 | |
626 | /* Call an ops of a v4l2_subdev, doing the right checks against |
627 | NULL pointers. |
628 | |
629 | Example: err = v4l2_subdev_call(sd, core, g_chip_ident, &chip); |
630 | */ |
631 | #define v4l2_subdev_call(sd, o, f, args...) \ |
632 | (!(sd) ? -ENODEV : (((sd)->ops->o && (sd)->ops->o->f) ? \ |
633 | (sd)->ops->o->f((sd) , ##args) : -ENOIOCTLCMD)) |
634 | |
635 | /* Send a notification to v4l2_device. */ |
636 | #define v4l2_subdev_notify(sd, notification, arg) \ |
637 | ((!(sd) || !(sd)->v4l2_dev || !(sd)->v4l2_dev->notify) ? -ENODEV : \ |
638 | (sd)->v4l2_dev->notify((sd), (notification), (arg))) |
639 | |
640 | #endif |
641 |
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