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 <media/v4l2-common.h> |
25 | #include <media/v4l2-mediabus.h> |
26 | |
27 | /* generic v4l2_device notify callback notification values */ |
28 | #define V4L2_SUBDEV_IR_RX_NOTIFY _IOW('v', 0, u32) |
29 | #define V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ 0x00000001 |
30 | #define V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED 0x00000002 |
31 | #define V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN 0x00000004 |
32 | #define V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN 0x00000008 |
33 | |
34 | #define V4L2_SUBDEV_IR_TX_NOTIFY _IOW('v', 1, u32) |
35 | #define V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ 0x00000001 |
36 | |
37 | struct v4l2_device; |
38 | struct v4l2_subdev; |
39 | struct tuner_setup; |
40 | |
41 | /* decode_vbi_line */ |
42 | struct v4l2_decode_vbi_line { |
43 | u32 is_second_field; /* Set to 0 for the first (odd) field, |
44 | set to 1 for the second (even) field. */ |
45 | u8 *p; /* Pointer to the sliced VBI data from the decoder. |
46 | On exit points to the start of the payload. */ |
47 | u32 line; /* Line number of the sliced VBI data (1-23) */ |
48 | u32 type; /* VBI service type (V4L2_SLICED_*). 0 if no service found */ |
49 | }; |
50 | |
51 | /* Sub-devices are devices that are connected somehow to the main bridge |
52 | device. These devices are usually audio/video muxers/encoders/decoders or |
53 | sensors and webcam controllers. |
54 | |
55 | Usually these devices are controlled through an i2c bus, but other busses |
56 | may also be used. |
57 | |
58 | The v4l2_subdev struct provides a way of accessing these devices in a |
59 | generic manner. Most operations that these sub-devices support fall in |
60 | a few categories: core ops, audio ops, video ops and tuner ops. |
61 | |
62 | More categories can be added if needed, although this should remain a |
63 | limited set (no more than approx. 8 categories). |
64 | |
65 | Each category has its own set of ops that subdev drivers can implement. |
66 | |
67 | A subdev driver can leave the pointer to the category ops NULL if |
68 | it does not implement them (e.g. an audio subdev will generally not |
69 | implement the video category ops). The exception is the core category: |
70 | this must always be present. |
71 | |
72 | These ops are all used internally so it is no problem to change, remove |
73 | or add ops or move ops from one to another category. Currently these |
74 | ops are based on the original ioctls, but since ops are not limited to |
75 | one argument there is room for improvement here once all i2c subdev |
76 | drivers are converted to use these ops. |
77 | */ |
78 | |
79 | /* Core ops: it is highly recommended to implement at least these ops: |
80 | |
81 | g_chip_ident |
82 | log_status |
83 | g_register |
84 | s_register |
85 | |
86 | This provides basic debugging support. |
87 | |
88 | The ioctl ops is meant for generic ioctl-like commands. Depending on |
89 | the use-case it might be better to use subdev-specific ops (currently |
90 | not yet implemented) since ops provide proper type-checking. |
91 | */ |
92 | |
93 | /* s_config: if set, then it is always called by the v4l2_i2c_new_subdev* |
94 | functions after the v4l2_subdev was registered. It is used to pass |
95 | platform data to the subdev which can be used during initialization. |
96 | |
97 | init: initialize the sensor registors to some sort of reasonable default |
98 | values. Do not use for new drivers and should be removed in existing |
99 | drivers. |
100 | |
101 | load_fw: load firmware. |
102 | |
103 | reset: generic reset command. The argument selects which subsystems to |
104 | reset. Passing 0 will always reset the whole chip. Do not use for new |
105 | drivers without discussing this first on the linux-media mailinglist. |
106 | There should be no reason normally to reset a device. |
107 | |
108 | s_gpio: set GPIO pins. Very simple right now, might need to be extended with |
109 | a direction argument if needed. |
110 | |
111 | s_power: puts subdevice in power saving mode (on == 0) or normal operation |
112 | mode (on == 1). |
113 | */ |
114 | struct v4l2_subdev_core_ops { |
115 | int (*g_chip_ident)(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip); |
116 | int (*log_status)(struct v4l2_subdev *sd); |
117 | int (*s_config)(struct v4l2_subdev *sd, int irq, void *platform_data); |
118 | int (*init)(struct v4l2_subdev *sd, u32 val); |
119 | int (*load_fw)(struct v4l2_subdev *sd); |
120 | int (*reset)(struct v4l2_subdev *sd, u32 val); |
121 | int (*s_gpio)(struct v4l2_subdev *sd, u32 val); |
122 | int (*queryctrl)(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc); |
123 | int (*g_ctrl)(struct v4l2_subdev *sd, struct v4l2_control *ctrl); |
124 | int (*s_ctrl)(struct v4l2_subdev *sd, struct v4l2_control *ctrl); |
125 | int (*g_ext_ctrls)(struct v4l2_subdev *sd, struct v4l2_ext_controls *ctrls); |
126 | int (*s_ext_ctrls)(struct v4l2_subdev *sd, struct v4l2_ext_controls *ctrls); |
127 | int (*try_ext_ctrls)(struct v4l2_subdev *sd, struct v4l2_ext_controls *ctrls); |
128 | int (*querymenu)(struct v4l2_subdev *sd, struct v4l2_querymenu *qm); |
129 | int (*s_std)(struct v4l2_subdev *sd, v4l2_std_id norm); |
130 | long (*ioctl)(struct v4l2_subdev *sd, unsigned int cmd, void *arg); |
131 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
132 | int (*g_register)(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg); |
133 | int (*s_register)(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg); |
134 | #endif |
135 | int (*s_power)(struct v4l2_subdev *sd, int on); |
136 | }; |
137 | |
138 | /* s_mode: switch the tuner to a specific tuner mode. Replacement of s_radio. |
139 | |
140 | s_radio: v4l device was opened in Radio mode, to be replaced by s_mode. |
141 | |
142 | s_type_addr: sets tuner type and its I2C addr. |
143 | |
144 | s_config: sets tda9887 specific stuff, like port1, port2 and qss |
145 | */ |
146 | struct v4l2_subdev_tuner_ops { |
147 | int (*s_mode)(struct v4l2_subdev *sd, enum v4l2_tuner_type); |
148 | int (*s_radio)(struct v4l2_subdev *sd); |
149 | int (*s_frequency)(struct v4l2_subdev *sd, struct v4l2_frequency *freq); |
150 | int (*g_frequency)(struct v4l2_subdev *sd, struct v4l2_frequency *freq); |
151 | int (*g_tuner)(struct v4l2_subdev *sd, struct v4l2_tuner *vt); |
152 | int (*s_tuner)(struct v4l2_subdev *sd, struct v4l2_tuner *vt); |
153 | int (*g_modulator)(struct v4l2_subdev *sd, struct v4l2_modulator *vm); |
154 | int (*s_modulator)(struct v4l2_subdev *sd, struct v4l2_modulator *vm); |
155 | int (*s_type_addr)(struct v4l2_subdev *sd, struct tuner_setup *type); |
156 | int (*s_config)(struct v4l2_subdev *sd, const struct v4l2_priv_tun_config *config); |
157 | }; |
158 | |
159 | /* s_clock_freq: set the frequency (in Hz) of the audio clock output. |
160 | Used to slave an audio processor to the video decoder, ensuring that |
161 | audio and video remain synchronized. Usual values for the frequency |
162 | are 48000, 44100 or 32000 Hz. If the frequency is not supported, then |
163 | -EINVAL is returned. |
164 | |
165 | s_i2s_clock_freq: sets I2S speed in bps. This is used to provide a standard |
166 | way to select I2S clock used by driving digital audio streams at some |
167 | board designs. Usual values for the frequency are 1024000 and 2048000. |
168 | If the frequency is not supported, then -EINVAL is returned. |
169 | |
170 | s_routing: used to define the input and/or output pins of an audio chip, |
171 | and any additional configuration data. |
172 | Never attempt to use user-level input IDs (e.g. Composite, S-Video, |
173 | Tuner) at this level. An i2c device shouldn't know about whether an |
174 | input pin is connected to a Composite connector, become on another |
175 | board or platform it might be connected to something else entirely. |
176 | The calling driver is responsible for mapping a user-level input to |
177 | the right pins on the i2c device. |
178 | */ |
179 | struct v4l2_subdev_audio_ops { |
180 | int (*s_clock_freq)(struct v4l2_subdev *sd, u32 freq); |
181 | int (*s_i2s_clock_freq)(struct v4l2_subdev *sd, u32 freq); |
182 | int (*s_routing)(struct v4l2_subdev *sd, u32 input, u32 output, u32 config); |
183 | int (*s_stream)(struct v4l2_subdev *sd, int enable); |
184 | }; |
185 | |
186 | /* |
187 | decode_vbi_line: video decoders that support sliced VBI need to implement |
188 | this ioctl. Field p of the v4l2_sliced_vbi_line struct is set to the |
189 | start of the VBI data that was generated by the decoder. The driver |
190 | then parses the sliced VBI data and sets the other fields in the |
191 | struct accordingly. The pointer p is updated to point to the start of |
192 | the payload which can be copied verbatim into the data field of the |
193 | v4l2_sliced_vbi_data struct. If no valid VBI data was found, then the |
194 | type field is set to 0 on return. |
195 | |
196 | s_vbi_data: used to generate VBI signals on a video signal. |
197 | v4l2_sliced_vbi_data is filled with the data packets that should be |
198 | output. Note that if you set the line field to 0, then that VBI signal |
199 | is disabled. If no valid VBI data was found, then the type field is |
200 | set to 0 on return. |
201 | |
202 | g_vbi_data: used to obtain the sliced VBI packet from a readback register. |
203 | Not all video decoders support this. If no data is available because |
204 | the readback register contains invalid or erroneous data -EIO is |
205 | returned. Note that you must fill in the 'id' member and the 'field' |
206 | member (to determine whether CC data from the first or second field |
207 | should be obtained). |
208 | |
209 | s_std_output: set v4l2_std_id for video OUTPUT devices. This is ignored by |
210 | video input devices. |
211 | |
212 | s_crystal_freq: sets the frequency of the crystal used to generate the |
213 | clocks in Hz. An extra flags field allows device specific configuration |
214 | regarding clock frequency dividers, etc. If not used, then set flags |
215 | to 0. If the frequency is not supported, then -EINVAL is returned. |
216 | |
217 | g_input_status: get input status. Same as the status field in the v4l2_input |
218 | struct. |
219 | |
220 | s_routing: see s_routing in audio_ops, except this version is for video |
221 | devices. |
222 | |
223 | s_dv_preset: set dv (Digital Video) preset in the sub device. Similar to |
224 | s_std() |
225 | |
226 | query_dv_preset: query dv preset in the sub device. This is similar to |
227 | querystd() |
228 | |
229 | s_dv_timings(): Set custom dv timings in the sub device. This is used |
230 | when sub device is capable of setting detailed timing information |
231 | in the hardware to generate/detect the video signal. |
232 | |
233 | g_dv_timings(): Get custom dv timings in the sub device. |
234 | |
235 | enum_mbus_fmt: enumerate pixel formats, provided by a video data source |
236 | |
237 | g_mbus_fmt: get the current pixel format, provided by a video data source |
238 | |
239 | try_mbus_fmt: try to set a pixel format on a video data source |
240 | |
241 | s_mbus_fmt: set a pixel format on a video data source |
242 | */ |
243 | struct v4l2_subdev_video_ops { |
244 | int (*s_routing)(struct v4l2_subdev *sd, u32 input, u32 output, u32 config); |
245 | int (*s_crystal_freq)(struct v4l2_subdev *sd, u32 freq, u32 flags); |
246 | int (*decode_vbi_line)(struct v4l2_subdev *sd, struct v4l2_decode_vbi_line *vbi_line); |
247 | int (*s_vbi_data)(struct v4l2_subdev *sd, const struct v4l2_sliced_vbi_data *vbi_data); |
248 | int (*g_vbi_data)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_data *vbi_data); |
249 | int (*g_sliced_vbi_cap)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_cap *cap); |
250 | int (*s_std_output)(struct v4l2_subdev *sd, v4l2_std_id std); |
251 | int (*querystd)(struct v4l2_subdev *sd, v4l2_std_id *std); |
252 | int (*g_input_status)(struct v4l2_subdev *sd, u32 *status); |
253 | int (*s_stream)(struct v4l2_subdev *sd, int enable); |
254 | int (*enum_fmt)(struct v4l2_subdev *sd, struct v4l2_fmtdesc *fmtdesc); |
255 | int (*g_fmt)(struct v4l2_subdev *sd, struct v4l2_format *fmt); |
256 | int (*try_fmt)(struct v4l2_subdev *sd, struct v4l2_format *fmt); |
257 | int (*s_fmt)(struct v4l2_subdev *sd, struct v4l2_format *fmt); |
258 | int (*cropcap)(struct v4l2_subdev *sd, struct v4l2_cropcap *cc); |
259 | int (*g_crop)(struct v4l2_subdev *sd, struct v4l2_crop *crop); |
260 | int (*s_crop)(struct v4l2_subdev *sd, struct v4l2_crop *crop); |
261 | int (*g_parm)(struct v4l2_subdev *sd, struct v4l2_streamparm *param); |
262 | int (*s_parm)(struct v4l2_subdev *sd, struct v4l2_streamparm *param); |
263 | int (*enum_framesizes)(struct v4l2_subdev *sd, struct v4l2_frmsizeenum *fsize); |
264 | int (*enum_frameintervals)(struct v4l2_subdev *sd, struct v4l2_frmivalenum *fival); |
265 | int (*s_dv_preset)(struct v4l2_subdev *sd, |
266 | struct v4l2_dv_preset *preset); |
267 | int (*query_dv_preset)(struct v4l2_subdev *sd, |
268 | struct v4l2_dv_preset *preset); |
269 | int (*s_dv_timings)(struct v4l2_subdev *sd, |
270 | struct v4l2_dv_timings *timings); |
271 | int (*g_dv_timings)(struct v4l2_subdev *sd, |
272 | struct v4l2_dv_timings *timings); |
273 | int (*enum_mbus_fmt)(struct v4l2_subdev *sd, int index, |
274 | enum v4l2_mbus_pixelcode *code); |
275 | int (*g_mbus_fmt)(struct v4l2_subdev *sd, |
276 | struct v4l2_mbus_framefmt *fmt); |
277 | int (*try_mbus_fmt)(struct v4l2_subdev *sd, |
278 | struct v4l2_mbus_framefmt *fmt); |
279 | int (*s_mbus_fmt)(struct v4l2_subdev *sd, |
280 | struct v4l2_mbus_framefmt *fmt); |
281 | }; |
282 | |
283 | /** |
284 | * struct v4l2_subdev_sensor_ops - v4l2-subdev sensor operations |
285 | * @g_skip_top_lines: number of lines at the top of the image to be skipped. |
286 | * This is needed for some sensors, which always corrupt |
287 | * several top lines of the output image, or which send their |
288 | * metadata in them. |
289 | */ |
290 | struct v4l2_subdev_sensor_ops { |
291 | int (*g_skip_top_lines)(struct v4l2_subdev *sd, u32 *lines); |
292 | }; |
293 | |
294 | /* |
295 | interrupt_service_routine: Called by the bridge chip's interrupt service |
296 | handler, when an IR interrupt status has be raised due to this subdev, |
297 | so that this subdev can handle the details. It may schedule work to be |
298 | performed later. It must not sleep. *Called from an IRQ context*. |
299 | |
300 | [rt]x_g_parameters: Get the current operating parameters and state of the |
301 | the IR receiver or transmitter. |
302 | |
303 | [rt]x_s_parameters: Set the current operating parameters and state of the |
304 | the IR receiver or transmitter. It is recommended to call |
305 | [rt]x_g_parameters first to fill out the current state, and only change |
306 | the fields that need to be changed. Upon return, the actual device |
307 | operating parameters and state will be returned. Note that hardware |
308 | limitations may prevent the actual settings from matching the requested |
309 | settings - e.g. an actual carrier setting of 35,904 Hz when 36,000 Hz |
310 | was requested. An exception is when the shutdown parameter is true. |
311 | The last used operational parameters will be returned, but the actual |
312 | state of the hardware be different to minimize power consumption and |
313 | processing when shutdown is true. |
314 | |
315 | rx_read: Reads received codes or pulse width data. |
316 | The semantics are similar to a non-blocking read() call. |
317 | |
318 | tx_write: Writes codes or pulse width data for transmission. |
319 | The semantics are similar to a non-blocking write() call. |
320 | */ |
321 | |
322 | enum v4l2_subdev_ir_mode { |
323 | V4L2_SUBDEV_IR_MODE_PULSE_WIDTH, /* space & mark widths in nanosecs */ |
324 | }; |
325 | |
326 | /* Data format of data read or written for V4L2_SUBDEV_IR_MODE_PULSE_WIDTH */ |
327 | #define V4L2_SUBDEV_IR_PULSE_MAX_WIDTH_NS 0x7fffffff |
328 | #define V4L2_SUBDEV_IR_PULSE_LEVEL_MASK 0x80000000 |
329 | #define V4L2_SUBDEV_IR_PULSE_RX_SEQ_END 0xffffffff |
330 | |
331 | struct v4l2_subdev_ir_parameters { |
332 | /* Either Rx or Tx */ |
333 | unsigned int bytes_per_data_element; /* of data in read or write call */ |
334 | enum v4l2_subdev_ir_mode mode; |
335 | |
336 | bool enable; |
337 | bool interrupt_enable; |
338 | bool shutdown; /* true: set hardware to low/no power, false: normal */ |
339 | |
340 | bool modulation; /* true: uses carrier, false: baseband */ |
341 | u32 max_pulse_width; /* ns, valid only for baseband signal */ |
342 | unsigned int carrier_freq; /* Hz, valid only for modulated signal*/ |
343 | unsigned int duty_cycle; /* percent, valid only for modulated signal*/ |
344 | bool invert; /* logically invert sense of mark/space */ |
345 | |
346 | /* Rx only */ |
347 | u32 noise_filter_min_width; /* ns, min time of a valid pulse */ |
348 | unsigned int carrier_range_lower; /* Hz, valid only for modulated sig */ |
349 | unsigned int carrier_range_upper; /* Hz, valid only for modulated sig */ |
350 | u32 resolution; /* ns */ |
351 | }; |
352 | |
353 | struct v4l2_subdev_ir_ops { |
354 | /* Common to receiver and transmitter */ |
355 | int (*interrupt_service_routine)(struct v4l2_subdev *sd, |
356 | u32 status, bool *handled); |
357 | |
358 | /* Receiver */ |
359 | int (*rx_read)(struct v4l2_subdev *sd, u8 *buf, size_t count, |
360 | ssize_t *num); |
361 | |
362 | int (*rx_g_parameters)(struct v4l2_subdev *sd, |
363 | struct v4l2_subdev_ir_parameters *params); |
364 | int (*rx_s_parameters)(struct v4l2_subdev *sd, |
365 | struct v4l2_subdev_ir_parameters *params); |
366 | |
367 | /* Transmitter */ |
368 | int (*tx_write)(struct v4l2_subdev *sd, u8 *buf, size_t count, |
369 | ssize_t *num); |
370 | |
371 | int (*tx_g_parameters)(struct v4l2_subdev *sd, |
372 | struct v4l2_subdev_ir_parameters *params); |
373 | int (*tx_s_parameters)(struct v4l2_subdev *sd, |
374 | struct v4l2_subdev_ir_parameters *params); |
375 | }; |
376 | |
377 | struct v4l2_subdev_ops { |
378 | const struct v4l2_subdev_core_ops *core; |
379 | const struct v4l2_subdev_tuner_ops *tuner; |
380 | const struct v4l2_subdev_audio_ops *audio; |
381 | const struct v4l2_subdev_video_ops *video; |
382 | const struct v4l2_subdev_ir_ops *ir; |
383 | const struct v4l2_subdev_sensor_ops *sensor; |
384 | }; |
385 | |
386 | #define V4L2_SUBDEV_NAME_SIZE 32 |
387 | |
388 | /* Set this flag if this subdev is a i2c device. */ |
389 | #define V4L2_SUBDEV_FL_IS_I2C (1U << 0) |
390 | |
391 | /* Each instance of a subdev driver should create this struct, either |
392 | stand-alone or embedded in a larger struct. |
393 | */ |
394 | struct v4l2_subdev { |
395 | struct list_head list; |
396 | struct module *owner; |
397 | u32 flags; |
398 | struct v4l2_device *v4l2_dev; |
399 | const struct v4l2_subdev_ops *ops; |
400 | /* name must be unique */ |
401 | char name[V4L2_SUBDEV_NAME_SIZE]; |
402 | /* can be used to group similar subdevs, value is driver-specific */ |
403 | u32 grp_id; |
404 | /* pointer to private data */ |
405 | void *priv; |
406 | }; |
407 | |
408 | static inline void v4l2_set_subdevdata(struct v4l2_subdev *sd, void *p) |
409 | { |
410 | sd->priv = p; |
411 | } |
412 | |
413 | static inline void *v4l2_get_subdevdata(const struct v4l2_subdev *sd) |
414 | { |
415 | return sd->priv; |
416 | } |
417 | |
418 | static inline void v4l2_subdev_init(struct v4l2_subdev *sd, |
419 | const struct v4l2_subdev_ops *ops) |
420 | { |
421 | INIT_LIST_HEAD(&sd->list); |
422 | /* ops->core MUST be set */ |
423 | BUG_ON(!ops || !ops->core); |
424 | sd->ops = ops; |
425 | sd->v4l2_dev = NULL; |
426 | sd->flags = 0; |
427 | sd->name[0] = '\0'; |
428 | sd->grp_id = 0; |
429 | sd->priv = NULL; |
430 | } |
431 | |
432 | /* Call an ops of a v4l2_subdev, doing the right checks against |
433 | NULL pointers. |
434 | |
435 | Example: err = v4l2_subdev_call(sd, core, g_chip_ident, &chip); |
436 | */ |
437 | #define v4l2_subdev_call(sd, o, f, args...) \ |
438 | (!(sd) ? -ENODEV : (((sd)->ops->o && (sd)->ops->o->f) ? \ |
439 | (sd)->ops->o->f((sd) , ##args) : -ENOIOCTLCMD)) |
440 | |
441 | /* Send a notification to v4l2_device. */ |
442 | #define v4l2_subdev_notify(sd, notification, arg) \ |
443 | ((!(sd) || !(sd)->v4l2_dev || !(sd)->v4l2_dev->notify) ? -ENODEV : \ |
444 | (sd)->v4l2_dev->notify((sd), (notification), (arg))) |
445 | |
446 | #endif |
447 |
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jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9