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2a1fcdf0 HV |
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 | ||
1d986add AW |
26 | /* generic v4l2_device notify callback notification values */ |
27 | #define V4L2_SUBDEV_IR_RX_NOTIFY _IOW('v', 0, u32) | |
28 | #define V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ 0x00000001 | |
29 | #define V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED 0x00000002 | |
30 | #define V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN 0x00000004 | |
31 | #define V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN 0x00000008 | |
32 | ||
33 | #define V4L2_SUBDEV_IR_TX_NOTIFY _IOW('v', 1, u32) | |
34 | #define V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ 0x00000001 | |
35 | ||
2a1fcdf0 HV |
36 | struct v4l2_device; |
37 | struct v4l2_subdev; | |
38 | struct tuner_setup; | |
39 | ||
78a3b4db HV |
40 | /* decode_vbi_line */ |
41 | struct v4l2_decode_vbi_line { | |
42 | u32 is_second_field; /* Set to 0 for the first (odd) field, | |
43 | set to 1 for the second (even) field. */ | |
44 | u8 *p; /* Pointer to the sliced VBI data from the decoder. | |
45 | On exit points to the start of the payload. */ | |
46 | u32 line; /* Line number of the sliced VBI data (1-23) */ | |
47 | u32 type; /* VBI service type (V4L2_SLICED_*). 0 if no service found */ | |
48 | }; | |
49 | ||
2a1fcdf0 HV |
50 | /* Sub-devices are devices that are connected somehow to the main bridge |
51 | device. These devices are usually audio/video muxers/encoders/decoders or | |
52 | sensors and webcam controllers. | |
53 | ||
54 | Usually these devices are controlled through an i2c bus, but other busses | |
55 | may also be used. | |
56 | ||
57 | The v4l2_subdev struct provides a way of accessing these devices in a | |
58 | generic manner. Most operations that these sub-devices support fall in | |
59 | a few categories: core ops, audio ops, video ops and tuner ops. | |
60 | ||
61 | More categories can be added if needed, although this should remain a | |
62 | limited set (no more than approx. 8 categories). | |
63 | ||
64 | Each category has its own set of ops that subdev drivers can implement. | |
65 | ||
66 | A subdev driver can leave the pointer to the category ops NULL if | |
67 | it does not implement them (e.g. an audio subdev will generally not | |
68 | implement the video category ops). The exception is the core category: | |
69 | this must always be present. | |
70 | ||
71 | These ops are all used internally so it is no problem to change, remove | |
72 | or add ops or move ops from one to another category. Currently these | |
73 | ops are based on the original ioctls, but since ops are not limited to | |
74 | one argument there is room for improvement here once all i2c subdev | |
75 | drivers are converted to use these ops. | |
76 | */ | |
77 | ||
78 | /* Core ops: it is highly recommended to implement at least these ops: | |
79 | ||
80 | g_chip_ident | |
81 | log_status | |
82 | g_register | |
83 | s_register | |
84 | ||
85 | This provides basic debugging support. | |
86 | ||
87 | The ioctl ops is meant for generic ioctl-like commands. Depending on | |
88 | the use-case it might be better to use subdev-specific ops (currently | |
89 | not yet implemented) since ops provide proper type-checking. | |
90 | */ | |
78a3b4db | 91 | |
f0222c7d HV |
92 | /* s_config: if set, then it is always called by the v4l2_i2c_new_subdev* |
93 | functions after the v4l2_subdev was registered. It is used to pass | |
94 | platform data to the subdev which can be used during initialization. | |
95 | ||
96 | init: initialize the sensor registors to some sort of reasonable default | |
78a3b4db HV |
97 | values. Do not use for new drivers and should be removed in existing |
98 | drivers. | |
99 | ||
cc26b076 HV |
100 | load_fw: load firmware. |
101 | ||
102 | reset: generic reset command. The argument selects which subsystems to | |
78a3b4db HV |
103 | reset. Passing 0 will always reset the whole chip. Do not use for new |
104 | drivers without discussing this first on the linux-media mailinglist. | |
105 | There should be no reason normally to reset a device. | |
106 | ||
107 | s_gpio: set GPIO pins. Very simple right now, might need to be extended with | |
108 | a direction argument if needed. | |
78a3b4db | 109 | */ |
2a1fcdf0 | 110 | struct v4l2_subdev_core_ops { |
aecde8b5 | 111 | int (*g_chip_ident)(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip); |
2a1fcdf0 | 112 | int (*log_status)(struct v4l2_subdev *sd); |
f0222c7d | 113 | int (*s_config)(struct v4l2_subdev *sd, int irq, void *platform_data); |
2a1fcdf0 | 114 | int (*init)(struct v4l2_subdev *sd, u32 val); |
cc26b076 | 115 | int (*load_fw)(struct v4l2_subdev *sd); |
2a1fcdf0 HV |
116 | int (*reset)(struct v4l2_subdev *sd, u32 val); |
117 | int (*s_gpio)(struct v4l2_subdev *sd, u32 val); | |
118 | int (*queryctrl)(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc); | |
119 | int (*g_ctrl)(struct v4l2_subdev *sd, struct v4l2_control *ctrl); | |
120 | int (*s_ctrl)(struct v4l2_subdev *sd, struct v4l2_control *ctrl); | |
952617f2 HV |
121 | int (*g_ext_ctrls)(struct v4l2_subdev *sd, struct v4l2_ext_controls *ctrls); |
122 | int (*s_ext_ctrls)(struct v4l2_subdev *sd, struct v4l2_ext_controls *ctrls); | |
123 | int (*try_ext_ctrls)(struct v4l2_subdev *sd, struct v4l2_ext_controls *ctrls); | |
2a1fcdf0 | 124 | int (*querymenu)(struct v4l2_subdev *sd, struct v4l2_querymenu *qm); |
f41737ec | 125 | int (*s_std)(struct v4l2_subdev *sd, v4l2_std_id norm); |
069b7479 | 126 | long (*ioctl)(struct v4l2_subdev *sd, unsigned int cmd, void *arg); |
2a1fcdf0 | 127 | #ifdef CONFIG_VIDEO_ADV_DEBUG |
aecde8b5 HV |
128 | int (*g_register)(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg); |
129 | int (*s_register)(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg); | |
2a1fcdf0 HV |
130 | #endif |
131 | }; | |
132 | ||
78a3b4db HV |
133 | /* s_mode: switch the tuner to a specific tuner mode. Replacement of s_radio. |
134 | ||
135 | s_radio: v4l device was opened in Radio mode, to be replaced by s_mode. | |
136 | ||
137 | s_type_addr: sets tuner type and its I2C addr. | |
138 | ||
139 | s_config: sets tda9887 specific stuff, like port1, port2 and qss | |
7c9fc9d5 HV |
140 | |
141 | s_standby: puts tuner on powersaving state, disabling it, except for i2c. | |
78a3b4db | 142 | */ |
2a1fcdf0 HV |
143 | struct v4l2_subdev_tuner_ops { |
144 | int (*s_mode)(struct v4l2_subdev *sd, enum v4l2_tuner_type); | |
145 | int (*s_radio)(struct v4l2_subdev *sd); | |
146 | int (*s_frequency)(struct v4l2_subdev *sd, struct v4l2_frequency *freq); | |
147 | int (*g_frequency)(struct v4l2_subdev *sd, struct v4l2_frequency *freq); | |
148 | int (*g_tuner)(struct v4l2_subdev *sd, struct v4l2_tuner *vt); | |
149 | int (*s_tuner)(struct v4l2_subdev *sd, struct v4l2_tuner *vt); | |
d6bacea6 EV |
150 | int (*g_modulator)(struct v4l2_subdev *sd, struct v4l2_modulator *vm); |
151 | int (*s_modulator)(struct v4l2_subdev *sd, struct v4l2_modulator *vm); | |
2a1fcdf0 HV |
152 | int (*s_type_addr)(struct v4l2_subdev *sd, struct tuner_setup *type); |
153 | int (*s_config)(struct v4l2_subdev *sd, const struct v4l2_priv_tun_config *config); | |
7c9fc9d5 | 154 | int (*s_standby)(struct v4l2_subdev *sd); |
2a1fcdf0 HV |
155 | }; |
156 | ||
78a3b4db HV |
157 | /* s_clock_freq: set the frequency (in Hz) of the audio clock output. |
158 | Used to slave an audio processor to the video decoder, ensuring that | |
159 | audio and video remain synchronized. Usual values for the frequency | |
160 | are 48000, 44100 or 32000 Hz. If the frequency is not supported, then | |
161 | -EINVAL is returned. | |
162 | ||
163 | s_i2s_clock_freq: sets I2S speed in bps. This is used to provide a standard | |
164 | way to select I2S clock used by driving digital audio streams at some | |
165 | board designs. Usual values for the frequency are 1024000 and 2048000. | |
166 | If the frequency is not supported, then -EINVAL is returned. | |
167 | ||
5325b427 HV |
168 | s_routing: used to define the input and/or output pins of an audio chip, |
169 | and any additional configuration data. | |
78a3b4db HV |
170 | Never attempt to use user-level input IDs (e.g. Composite, S-Video, |
171 | Tuner) at this level. An i2c device shouldn't know about whether an | |
172 | input pin is connected to a Composite connector, become on another | |
173 | board or platform it might be connected to something else entirely. | |
174 | The calling driver is responsible for mapping a user-level input to | |
175 | the right pins on the i2c device. | |
176 | */ | |
2a1fcdf0 HV |
177 | struct v4l2_subdev_audio_ops { |
178 | int (*s_clock_freq)(struct v4l2_subdev *sd, u32 freq); | |
179 | int (*s_i2s_clock_freq)(struct v4l2_subdev *sd, u32 freq); | |
5325b427 | 180 | int (*s_routing)(struct v4l2_subdev *sd, u32 input, u32 output, u32 config); |
2a1fcdf0 HV |
181 | }; |
182 | ||
78a3b4db HV |
183 | /* |
184 | decode_vbi_line: video decoders that support sliced VBI need to implement | |
185 | this ioctl. Field p of the v4l2_sliced_vbi_line struct is set to the | |
186 | start of the VBI data that was generated by the decoder. The driver | |
187 | then parses the sliced VBI data and sets the other fields in the | |
188 | struct accordingly. The pointer p is updated to point to the start of | |
189 | the payload which can be copied verbatim into the data field of the | |
190 | v4l2_sliced_vbi_data struct. If no valid VBI data was found, then the | |
191 | type field is set to 0 on return. | |
192 | ||
cc26b076 | 193 | s_vbi_data: used to generate VBI signals on a video signal. |
78a3b4db HV |
194 | v4l2_sliced_vbi_data is filled with the data packets that should be |
195 | output. Note that if you set the line field to 0, then that VBI signal | |
196 | is disabled. If no valid VBI data was found, then the type field is | |
197 | set to 0 on return. | |
198 | ||
cc26b076 | 199 | g_vbi_data: used to obtain the sliced VBI packet from a readback register. |
78a3b4db HV |
200 | Not all video decoders support this. If no data is available because |
201 | the readback register contains invalid or erroneous data -EIO is | |
202 | returned. Note that you must fill in the 'id' member and the 'field' | |
203 | member (to determine whether CC data from the first or second field | |
204 | should be obtained). | |
205 | ||
cc26b076 | 206 | s_std_output: set v4l2_std_id for video OUTPUT devices. This is ignored by |
78a3b4db HV |
207 | video input devices. |
208 | ||
3ff4ad81 HV |
209 | s_crystal_freq: sets the frequency of the crystal used to generate the |
210 | clocks in Hz. An extra flags field allows device specific configuration | |
78a3b4db HV |
211 | regarding clock frequency dividers, etc. If not used, then set flags |
212 | to 0. If the frequency is not supported, then -EINVAL is returned. | |
213 | ||
cc26b076 | 214 | g_input_status: get input status. Same as the status field in the v4l2_input |
78a3b4db HV |
215 | struct. |
216 | ||
cc26b076 | 217 | s_routing: see s_routing in audio_ops, except this version is for video |
78a3b4db HV |
218 | devices. |
219 | */ | |
2a1fcdf0 | 220 | struct v4l2_subdev_video_ops { |
5325b427 | 221 | int (*s_routing)(struct v4l2_subdev *sd, u32 input, u32 output, u32 config); |
3ff4ad81 | 222 | int (*s_crystal_freq)(struct v4l2_subdev *sd, u32 freq, u32 flags); |
2a1fcdf0 HV |
223 | int (*decode_vbi_line)(struct v4l2_subdev *sd, struct v4l2_decode_vbi_line *vbi_line); |
224 | int (*s_vbi_data)(struct v4l2_subdev *sd, const struct v4l2_sliced_vbi_data *vbi_data); | |
225 | int (*g_vbi_data)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_data *vbi_data); | |
1fe2740f | 226 | int (*g_sliced_vbi_cap)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_cap *cap); |
2a1fcdf0 | 227 | int (*s_std_output)(struct v4l2_subdev *sd, v4l2_std_id std); |
1b6f1d96 HV |
228 | int (*querystd)(struct v4l2_subdev *sd, v4l2_std_id *std); |
229 | int (*g_input_status)(struct v4l2_subdev *sd, u32 *status); | |
2a1fcdf0 | 230 | int (*s_stream)(struct v4l2_subdev *sd, int enable); |
2da9479a | 231 | int (*enum_fmt)(struct v4l2_subdev *sd, struct v4l2_fmtdesc *fmtdesc); |
2a1fcdf0 | 232 | int (*g_fmt)(struct v4l2_subdev *sd, struct v4l2_format *fmt); |
2da9479a HV |
233 | int (*try_fmt)(struct v4l2_subdev *sd, struct v4l2_format *fmt); |
234 | int (*s_fmt)(struct v4l2_subdev *sd, struct v4l2_format *fmt); | |
b7f2cef0 GL |
235 | int (*cropcap)(struct v4l2_subdev *sd, struct v4l2_cropcap *cc); |
236 | int (*g_crop)(struct v4l2_subdev *sd, struct v4l2_crop *crop); | |
237 | int (*s_crop)(struct v4l2_subdev *sd, struct v4l2_crop *crop); | |
2da9479a HV |
238 | int (*g_parm)(struct v4l2_subdev *sd, struct v4l2_streamparm *param); |
239 | int (*s_parm)(struct v4l2_subdev *sd, struct v4l2_streamparm *param); | |
4b2ce11a HV |
240 | int (*enum_framesizes)(struct v4l2_subdev *sd, struct v4l2_frmsizeenum *fsize); |
241 | int (*enum_frameintervals)(struct v4l2_subdev *sd, struct v4l2_frmivalenum *fival); | |
2a1fcdf0 HV |
242 | }; |
243 | ||
1d986add AW |
244 | /* |
245 | interrupt_service_routine: Called by the bridge chip's interrupt service | |
246 | handler, when an IR interrupt status has be raised due to this subdev, | |
247 | so that this subdev can handle the details. It may schedule work to be | |
248 | performed later. It must not sleep. *Called from an IRQ context*. | |
249 | ||
250 | [rt]x_g_parameters: Get the current operating parameters and state of the | |
251 | the IR receiver or transmitter. | |
252 | ||
253 | [rt]x_s_parameters: Set the current operating parameters and state of the | |
254 | the IR receiver or transmitter. It is recommended to call | |
255 | [rt]x_g_parameters first to fill out the current state, and only change | |
256 | the fields that need to be changed. Upon return, the actual device | |
257 | operating parameters and state will be returned. Note that hardware | |
258 | limitations may prevent the actual settings from matching the requested | |
259 | settings - e.g. an actual carrier setting of 35,904 Hz when 36,000 Hz | |
260 | was requested. An exception is when the shutdown parameter is true. | |
261 | The last used operational parameters will be returned, but the actual | |
262 | state of the hardware be different to minimize power consumption and | |
263 | processing when shutdown is true. | |
264 | ||
265 | rx_read: Reads received codes or pulse width data. | |
266 | The semantics are similar to a non-blocking read() call. | |
267 | ||
268 | tx_write: Writes codes or pulse width data for transmission. | |
269 | The semantics are similar to a non-blocking write() call. | |
270 | */ | |
271 | ||
272 | enum v4l2_subdev_ir_mode { | |
273 | V4L2_SUBDEV_IR_MODE_PULSE_WIDTH, /* space & mark widths in nanosecs */ | |
274 | }; | |
275 | ||
276 | /* Data format of data read or written for V4L2_SUBDEV_IR_MODE_PULSE_WIDTH */ | |
277 | #define V4L2_SUBDEV_IR_PULSE_MAX_WIDTH_NS 0x7fffffff | |
278 | #define V4L2_SUBDEV_IR_PULSE_LEVEL_MASK 0x80000000 | |
279 | #define V4L2_SUBDEV_IR_PULSE_RX_SEQ_END 0xffffffff | |
280 | ||
281 | struct v4l2_subdev_ir_parameters { | |
282 | /* Either Rx or Tx */ | |
283 | unsigned int bytes_per_data_element; /* of data in read or write call */ | |
284 | enum v4l2_subdev_ir_mode mode; | |
285 | ||
286 | bool enable; | |
287 | bool interrupt_enable; | |
288 | bool shutdown; /* true: set hardware to low/no power, false: normal */ | |
289 | ||
290 | bool modulation; /* true: uses carrier, false: baseband */ | |
291 | u32 max_pulse_width; /* ns, valid only for baseband signal */ | |
292 | unsigned int carrier_freq; /* Hz, valid only for modulated signal*/ | |
293 | unsigned int duty_cycle; /* percent, valid only for modulated signal*/ | |
294 | bool invert; /* logically invert sense of mark/space */ | |
295 | ||
296 | /* Rx only */ | |
297 | u32 noise_filter_min_width; /* ns, min time of a valid pulse */ | |
298 | unsigned int carrier_range_lower; /* Hz, valid only for modulated sig */ | |
299 | unsigned int carrier_range_upper; /* Hz, valid only for modulated sig */ | |
300 | u32 resolution; /* ns */ | |
301 | }; | |
302 | ||
303 | struct v4l2_subdev_ir_ops { | |
304 | /* Common to receiver and transmitter */ | |
305 | int (*interrupt_service_routine)(struct v4l2_subdev *sd, | |
306 | u32 status, bool *handled); | |
307 | ||
308 | /* Receiver */ | |
309 | int (*rx_read)(struct v4l2_subdev *sd, u8 *buf, size_t count, | |
310 | ssize_t *num); | |
311 | ||
312 | int (*rx_g_parameters)(struct v4l2_subdev *sd, | |
313 | struct v4l2_subdev_ir_parameters *params); | |
314 | int (*rx_s_parameters)(struct v4l2_subdev *sd, | |
315 | struct v4l2_subdev_ir_parameters *params); | |
316 | ||
317 | /* Transmitter */ | |
318 | int (*tx_write)(struct v4l2_subdev *sd, u8 *buf, size_t count, | |
319 | ssize_t *num); | |
320 | ||
321 | int (*tx_g_parameters)(struct v4l2_subdev *sd, | |
322 | struct v4l2_subdev_ir_parameters *params); | |
323 | int (*tx_s_parameters)(struct v4l2_subdev *sd, | |
324 | struct v4l2_subdev_ir_parameters *params); | |
325 | }; | |
326 | ||
2a1fcdf0 HV |
327 | struct v4l2_subdev_ops { |
328 | const struct v4l2_subdev_core_ops *core; | |
329 | const struct v4l2_subdev_tuner_ops *tuner; | |
330 | const struct v4l2_subdev_audio_ops *audio; | |
331 | const struct v4l2_subdev_video_ops *video; | |
1d986add | 332 | const struct v4l2_subdev_ir_ops *ir; |
2a1fcdf0 HV |
333 | }; |
334 | ||
335 | #define V4L2_SUBDEV_NAME_SIZE 32 | |
336 | ||
b5b2b7ed HV |
337 | /* Set this flag if this subdev is a i2c device. */ |
338 | #define V4L2_SUBDEV_FL_IS_I2C (1U << 0) | |
339 | ||
2a1fcdf0 HV |
340 | /* Each instance of a subdev driver should create this struct, either |
341 | stand-alone or embedded in a larger struct. | |
342 | */ | |
343 | struct v4l2_subdev { | |
344 | struct list_head list; | |
345 | struct module *owner; | |
b5b2b7ed | 346 | u32 flags; |
b0167600 | 347 | struct v4l2_device *v4l2_dev; |
2a1fcdf0 HV |
348 | const struct v4l2_subdev_ops *ops; |
349 | /* name must be unique */ | |
350 | char name[V4L2_SUBDEV_NAME_SIZE]; | |
351 | /* can be used to group similar subdevs, value is driver-specific */ | |
352 | u32 grp_id; | |
353 | /* pointer to private data */ | |
354 | void *priv; | |
355 | }; | |
356 | ||
357 | static inline void v4l2_set_subdevdata(struct v4l2_subdev *sd, void *p) | |
358 | { | |
359 | sd->priv = p; | |
360 | } | |
361 | ||
362 | static inline void *v4l2_get_subdevdata(const struct v4l2_subdev *sd) | |
363 | { | |
364 | return sd->priv; | |
365 | } | |
366 | ||
2a1fcdf0 HV |
367 | static inline void v4l2_subdev_init(struct v4l2_subdev *sd, |
368 | const struct v4l2_subdev_ops *ops) | |
369 | { | |
370 | INIT_LIST_HEAD(&sd->list); | |
371 | /* ops->core MUST be set */ | |
372 | BUG_ON(!ops || !ops->core); | |
373 | sd->ops = ops; | |
b0167600 | 374 | sd->v4l2_dev = NULL; |
b5b2b7ed | 375 | sd->flags = 0; |
2a1fcdf0 HV |
376 | sd->name[0] = '\0'; |
377 | sd->grp_id = 0; | |
378 | sd->priv = NULL; | |
379 | } | |
380 | ||
381 | /* Call an ops of a v4l2_subdev, doing the right checks against | |
382 | NULL pointers. | |
383 | ||
384 | Example: err = v4l2_subdev_call(sd, core, g_chip_ident, &chip); | |
385 | */ | |
386 | #define v4l2_subdev_call(sd, o, f, args...) \ | |
387 | (!(sd) ? -ENODEV : (((sd) && (sd)->ops->o && (sd)->ops->o->f) ? \ | |
388 | (sd)->ops->o->f((sd) , ##args) : -ENOIOCTLCMD)) | |
389 | ||
98ec6339 HV |
390 | /* Send a notification to v4l2_device. */ |
391 | #define v4l2_subdev_notify(sd, notification, arg) \ | |
392 | ((!(sd) || !(sd)->v4l2_dev || !(sd)->v4l2_dev->notify) ? -ENODEV : \ | |
393 | (sd)->v4l2_dev->notify((sd), (notification), (arg))) | |
394 | ||
2a1fcdf0 | 395 | #endif |