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e55222ef GL |
1 | /* |
2 | * camera image capture (abstract) bus driver header | |
3 | * | |
4 | * Copyright (C) 2006, Sascha Hauer, Pengutronix | |
5 | * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
12 | #ifndef SOC_CAMERA_H | |
13 | #define SOC_CAMERA_H | |
14 | ||
d839fe17 | 15 | #include <linux/bitops.h> |
52d268a3 | 16 | #include <linux/device.h> |
1c3bb743 GL |
17 | #include <linux/mutex.h> |
18 | #include <linux/pm.h> | |
e55222ef | 19 | #include <linux/videodev2.h> |
092d3921 | 20 | #include <media/videobuf-core.h> |
592c2aba | 21 | #include <media/videobuf2-core.h> |
e09da11d | 22 | #include <media/v4l2-async.h> |
ee02da64 | 23 | #include <media/v4l2-ctrls.h> |
979ea1dd | 24 | #include <media/v4l2-device.h> |
e55222ef | 25 | |
57bee29d | 26 | struct file; |
25a34811 | 27 | struct soc_camera_desc; |
e09da11d | 28 | struct soc_camera_async_client; |
57bee29d | 29 | |
e55222ef | 30 | struct soc_camera_device { |
d33b290a | 31 | struct list_head list; /* list of all registered devices */ |
25a34811 | 32 | struct soc_camera_desc *sdesc; |
979ea1dd | 33 | struct device *pdev; /* Platform device */ |
7dfff953 GL |
34 | struct device *parent; /* Camera host device */ |
35 | struct device *control; /* E.g., the i2c client */ | |
6a6c8786 GL |
36 | s32 user_width; |
37 | s32 user_height; | |
0e4c180d SA |
38 | u32 bytesperline; /* for padding, zero if unused */ |
39 | u32 sizeimage; | |
760697be | 40 | enum v4l2_colorspace colorspace; |
e55222ef GL |
41 | unsigned char iface; /* Host number */ |
42 | unsigned char devnum; /* Device number per host */ | |
a9bef518 | 43 | struct soc_camera_sense *sense; /* See comment in struct definition */ |
e55222ef | 44 | struct video_device *vdev; |
ee02da64 | 45 | struct v4l2_ctrl_handler ctrl_handler; |
760697be | 46 | const struct soc_camera_format_xlate *current_fmt; |
c2786ad2 GL |
47 | struct soc_camera_format_xlate *user_formats; |
48 | int num_user_formats; | |
025c18a1 | 49 | enum v4l2_field field; /* Preserve field over close() */ |
1c3bb743 | 50 | void *host_priv; /* Per-device host private data */ |
dd669e90 | 51 | /* soc_camera.c private count. Only accessed with .host_lock held */ |
9dc4e48f | 52 | int use_count; |
57bee29d | 53 | struct file *streamer; /* stream owner */ |
9aea470b | 54 | struct v4l2_clk *clk; |
e09da11d GL |
55 | /* Asynchronous subdevice management */ |
56 | struct soc_camera_async_client *sasc; | |
57 | /* video buffer queue */ | |
592c2aba GL |
58 | union { |
59 | struct videobuf_queue vb_vidq; | |
60 | struct vb2_queue vb2_vidq; | |
61 | }; | |
e55222ef GL |
62 | }; |
63 | ||
914f05c8 LP |
64 | /* Host supports programmable stride */ |
65 | #define SOCAM_HOST_CAP_STRIDE (1 << 0) | |
66 | ||
e09da11d GL |
67 | enum soc_camera_subdev_role { |
68 | SOCAM_SUBDEV_DATA_SOURCE = 1, | |
69 | SOCAM_SUBDEV_DATA_SINK, | |
70 | SOCAM_SUBDEV_DATA_PROCESSOR, | |
71 | }; | |
72 | ||
73 | struct soc_camera_async_subdev { | |
74 | struct v4l2_async_subdev asd; | |
75 | enum soc_camera_subdev_role role; | |
76 | }; | |
77 | ||
e55222ef | 78 | struct soc_camera_host { |
979ea1dd | 79 | struct v4l2_device v4l2_dev; |
e55222ef | 80 | struct list_head list; |
e09da11d GL |
81 | struct mutex host_lock; /* Main synchronisation lock */ |
82 | struct mutex clk_lock; /* Protect pipeline modifications */ | |
2f9a0c88 | 83 | unsigned char nr; /* Host number */ |
914f05c8 | 84 | u32 capabilities; |
f7f6ce2d | 85 | struct soc_camera_device *icd; /* Currently attached client */ |
e55222ef | 86 | void *priv; |
af128a10 | 87 | const char *drv_name; |
b8d9904c | 88 | struct soc_camera_host_ops *ops; |
e09da11d GL |
89 | struct v4l2_async_subdev **asd; /* Flat array, arranged in groups */ |
90 | int *asd_sizes; /* 0-terminated array of asd group sizes */ | |
b8d9904c GL |
91 | }; |
92 | ||
93 | struct soc_camera_host_ops { | |
94 | struct module *owner; | |
e55222ef GL |
95 | int (*add)(struct soc_camera_device *); |
96 | void (*remove)(struct soc_camera_device *); | |
eb569cf9 GL |
97 | int (*clock_start)(struct soc_camera_host *); |
98 | void (*clock_stop)(struct soc_camera_host *); | |
fa48984e GL |
99 | /* |
100 | * .get_formats() is called for each client device format, but | |
101 | * .put_formats() is only called once. Further, if any of the calls to | |
102 | * .get_formats() fail, .put_formats() will not be called at all, the | |
103 | * failing .get_formats() must then clean up internally. | |
104 | */ | |
3805f201 | 105 | int (*get_formats)(struct soc_camera_device *, unsigned int, |
c2786ad2 | 106 | struct soc_camera_format_xlate *); |
fa48984e | 107 | void (*put_formats)(struct soc_camera_device *); |
6a6c8786 GL |
108 | int (*cropcap)(struct soc_camera_device *, struct v4l2_cropcap *); |
109 | int (*get_crop)(struct soc_camera_device *, struct v4l2_crop *); | |
4f996594 | 110 | int (*set_crop)(struct soc_camera_device *, const struct v4l2_crop *); |
3bfb4100 GL |
111 | int (*get_selection)(struct soc_camera_device *, struct v4l2_selection *); |
112 | int (*set_selection)(struct soc_camera_device *, struct v4l2_selection *); | |
aee5c2f1 GL |
113 | /* |
114 | * The difference to .set_crop() is, that .set_livecrop is not allowed | |
115 | * to change the output sizes | |
116 | */ | |
4f996594 | 117 | int (*set_livecrop)(struct soc_camera_device *, const struct v4l2_crop *); |
09e231b3 | 118 | int (*set_fmt)(struct soc_camera_device *, struct v4l2_format *); |
d8fac217 | 119 | int (*try_fmt)(struct soc_camera_device *, struct v4l2_format *); |
a034d1b7 | 120 | void (*init_videobuf)(struct videobuf_queue *, |
092d3921 | 121 | struct soc_camera_device *); |
592c2aba GL |
122 | int (*init_videobuf2)(struct vb2_queue *, |
123 | struct soc_camera_device *); | |
57bee29d | 124 | int (*reqbufs)(struct soc_camera_device *, struct v4l2_requestbuffers *); |
e55222ef | 125 | int (*querycap)(struct soc_camera_host *, struct v4l2_capability *); |
8843d119 | 126 | int (*set_bus_param)(struct soc_camera_device *); |
c9f6ef69 GL |
127 | int (*get_parm)(struct soc_camera_device *, struct v4l2_streamparm *); |
128 | int (*set_parm)(struct soc_camera_device *, struct v4l2_streamparm *); | |
ad3537b5 | 129 | int (*enum_framesizes)(struct soc_camera_device *, struct v4l2_frmsizeenum *); |
e55222ef GL |
130 | unsigned int (*poll)(struct file *, poll_table *); |
131 | }; | |
132 | ||
bd73b36f GL |
133 | #define SOCAM_SENSOR_INVERT_PCLK (1 << 0) |
134 | #define SOCAM_SENSOR_INVERT_MCLK (1 << 1) | |
135 | #define SOCAM_SENSOR_INVERT_HSYNC (1 << 2) | |
136 | #define SOCAM_SENSOR_INVERT_VSYNC (1 << 3) | |
137 | #define SOCAM_SENSOR_INVERT_DATA (1 << 4) | |
138 | ||
0fd327bd | 139 | struct i2c_board_info; |
96e442c1 | 140 | struct regulator_bulk_data; |
0fd327bd | 141 | |
25a34811 | 142 | struct soc_camera_subdev_desc { |
bd73b36f GL |
143 | /* Per camera SOCAM_SENSOR_* bus flags */ |
144 | unsigned long flags; | |
25a34811 GL |
145 | |
146 | /* sensor driver private platform data */ | |
147 | void *drv_priv; | |
3fd7ceff | 148 | |
96e442c1 AP |
149 | /* Optional regulators that have to be managed on power on/off events */ |
150 | struct regulator_bulk_data *regulators; | |
151 | int num_regulators; | |
152 | ||
25a34811 GL |
153 | /* Optional callbacks to power on or off and reset the sensor */ |
154 | int (*power)(struct device *, int); | |
155 | int (*reset)(struct device *); | |
156 | ||
157 | /* | |
158 | * some platforms may support different data widths than the sensors | |
159 | * native ones due to different data line routing. Let the board code | |
160 | * overwrite the width flags. | |
161 | */ | |
162 | int (*set_bus_param)(struct soc_camera_subdev_desc *, unsigned long flags); | |
163 | unsigned long (*query_bus_param)(struct soc_camera_subdev_desc *); | |
164 | void (*free_bus)(struct soc_camera_subdev_desc *); | |
165 | }; | |
166 | ||
167 | struct soc_camera_host_desc { | |
168 | /* Camera bus id, used to match a camera and a bus */ | |
169 | int bus_id; | |
170 | int i2c_adapter_id; | |
171 | struct i2c_board_info *board_info; | |
172 | const char *module_name; | |
173 | ||
c41debaf | 174 | /* |
d33b290a GL |
175 | * For non-I2C devices platform has to provide methods to add a device |
176 | * to the system and to remove it | |
c41debaf | 177 | */ |
7dfff953 GL |
178 | int (*add_device)(struct soc_camera_device *); |
179 | void (*del_device)(struct soc_camera_device *); | |
25a34811 GL |
180 | }; |
181 | ||
182 | /* | |
e09da11d | 183 | * Platform data for "soc-camera-pdrv" |
25a34811 GL |
184 | * This MUST be kept binary-identical to struct soc_camera_link below, until |
185 | * it is completely replaced by this one, after which we can split it into its | |
186 | * two components. | |
187 | */ | |
188 | struct soc_camera_desc { | |
189 | struct soc_camera_subdev_desc subdev_desc; | |
190 | struct soc_camera_host_desc host_desc; | |
191 | }; | |
192 | ||
193 | /* Prepare to replace this struct: don't change its layout any more! */ | |
194 | struct soc_camera_link { | |
195 | /* | |
196 | * Subdevice part - keep at top and compatible to | |
197 | * struct soc_camera_subdev_desc | |
198 | */ | |
199 | ||
200 | /* Per camera SOCAM_SENSOR_* bus flags */ | |
201 | unsigned long flags; | |
202 | ||
203 | void *priv; | |
204 | ||
205 | /* Optional regulators that have to be managed on power on/off events */ | |
206 | struct regulator_bulk_data *regulators; | |
207 | int num_regulators; | |
208 | ||
81034663 SH |
209 | /* Optional callbacks to power on or off and reset the sensor */ |
210 | int (*power)(struct device *, int); | |
211 | int (*reset)(struct device *); | |
28f59339 SH |
212 | /* |
213 | * some platforms may support different data widths than the sensors | |
214 | * native ones due to different data line routing. Let the board code | |
215 | * overwrite the width flags. | |
216 | */ | |
217 | int (*set_bus_param)(struct soc_camera_link *, unsigned long flags); | |
218 | unsigned long (*query_bus_param)(struct soc_camera_link *); | |
594bb46d | 219 | void (*free_bus)(struct soc_camera_link *); |
25a34811 GL |
220 | |
221 | /* | |
222 | * Host part - keep at bottom and compatible to | |
223 | * struct soc_camera_host_desc | |
224 | */ | |
225 | ||
226 | /* Camera bus id, used to match a camera and a bus */ | |
227 | int bus_id; | |
228 | int i2c_adapter_id; | |
229 | struct i2c_board_info *board_info; | |
230 | const char *module_name; | |
231 | ||
232 | /* | |
233 | * For non-I2C devices platform has to provide methods to add a device | |
234 | * to the system and to remove it | |
235 | */ | |
236 | int (*add_device)(struct soc_camera_device *); | |
237 | void (*del_device)(struct soc_camera_device *); | |
e55222ef GL |
238 | }; |
239 | ||
96c75399 GL |
240 | static inline struct soc_camera_host *to_soc_camera_host( |
241 | const struct device *dev) | |
e55222ef | 242 | { |
979ea1dd GL |
243 | struct v4l2_device *v4l2_dev = dev_get_drvdata(dev); |
244 | ||
245 | return container_of(v4l2_dev, struct soc_camera_host, v4l2_dev); | |
e55222ef GL |
246 | } |
247 | ||
25a34811 | 248 | static inline struct soc_camera_desc *to_soc_camera_desc( |
96c75399 | 249 | const struct soc_camera_device *icd) |
40e2e092 | 250 | { |
25a34811 | 251 | return icd->sdesc; |
40e2e092 | 252 | } |
e55222ef | 253 | |
96c75399 GL |
254 | static inline struct device *to_soc_camera_control( |
255 | const struct soc_camera_device *icd) | |
40e2e092 | 256 | { |
7dfff953 | 257 | return icd->control; |
40e2e092 | 258 | } |
e55222ef | 259 | |
96c75399 GL |
260 | static inline struct v4l2_subdev *soc_camera_to_subdev( |
261 | const struct soc_camera_device *icd) | |
c9c1f1c0 GL |
262 | { |
263 | struct device *control = to_soc_camera_control(icd); | |
264 | return dev_get_drvdata(control); | |
265 | } | |
266 | ||
40e2e092 GL |
267 | int soc_camera_host_register(struct soc_camera_host *ici); |
268 | void soc_camera_host_unregister(struct soc_camera_host *ici); | |
269 | ||
40e2e092 | 270 | const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc( |
c2786ad2 | 271 | struct soc_camera_device *icd, unsigned int fourcc); |
25c4d74e | 272 | |
c2786ad2 GL |
273 | /** |
274 | * struct soc_camera_format_xlate - match between host and sensor formats | |
760697be GL |
275 | * @code: code of a sensor provided format |
276 | * @host_fmt: host format after host translation from code | |
c2786ad2 GL |
277 | * |
278 | * Host and sensor translation structure. Used in table of host and sensor | |
279 | * formats matchings in soc_camera_device. A host can override the generic list | |
280 | * generation by implementing get_formats(), and use it for format checks and | |
281 | * format setup. | |
282 | */ | |
283 | struct soc_camera_format_xlate { | |
760697be GL |
284 | enum v4l2_mbus_pixelcode code; |
285 | const struct soc_mbus_pixelfmt *host_fmt; | |
c2786ad2 GL |
286 | }; |
287 | ||
a9bef518 GL |
288 | #define SOCAM_SENSE_PCLK_CHANGED (1 << 0) |
289 | ||
290 | /** | |
291 | * This struct can be attached to struct soc_camera_device by the host driver | |
292 | * to request sense from the camera, for example, when calling .set_fmt(). The | |
293 | * host then can check which flags are set and verify respective values if any. | |
294 | * For example, if SOCAM_SENSE_PCLK_CHANGED is set, it means, pixclock has | |
295 | * changed during this operation. After completion the host should detach sense. | |
296 | * | |
297 | * @flags ored SOCAM_SENSE_* flags | |
298 | * @master_clock if the host wants to be informed about pixel-clock | |
299 | * change, it better set master_clock. | |
300 | * @pixel_clock_max maximum pixel clock frequency supported by the host, | |
301 | * camera is not allowed to exceed this. | |
302 | * @pixel_clock if the camera driver changed pixel clock during this | |
303 | * operation, it sets SOCAM_SENSE_PCLK_CHANGED, uses | |
304 | * master_clock to calculate the new pixel-clock and | |
305 | * sets this field. | |
306 | */ | |
307 | struct soc_camera_sense { | |
308 | unsigned long flags; | |
309 | unsigned long master_clock; | |
310 | unsigned long pixel_clock_max; | |
311 | unsigned long pixel_clock; | |
312 | }; | |
313 | ||
d839fe17 GL |
314 | #define SOCAM_DATAWIDTH(x) BIT((x) - 1) |
315 | #define SOCAM_DATAWIDTH_4 SOCAM_DATAWIDTH(4) | |
316 | #define SOCAM_DATAWIDTH_8 SOCAM_DATAWIDTH(8) | |
317 | #define SOCAM_DATAWIDTH_9 SOCAM_DATAWIDTH(9) | |
318 | #define SOCAM_DATAWIDTH_10 SOCAM_DATAWIDTH(10) | |
7b88fc08 | 319 | #define SOCAM_DATAWIDTH_12 SOCAM_DATAWIDTH(12) |
d839fe17 GL |
320 | #define SOCAM_DATAWIDTH_15 SOCAM_DATAWIDTH(15) |
321 | #define SOCAM_DATAWIDTH_16 SOCAM_DATAWIDTH(16) | |
7b88fc08 PE |
322 | #define SOCAM_DATAWIDTH_18 SOCAM_DATAWIDTH(18) |
323 | #define SOCAM_DATAWIDTH_24 SOCAM_DATAWIDTH(24) | |
042d8790 GL |
324 | |
325 | #define SOCAM_DATAWIDTH_MASK (SOCAM_DATAWIDTH_4 | SOCAM_DATAWIDTH_8 | \ | |
326 | SOCAM_DATAWIDTH_9 | SOCAM_DATAWIDTH_10 | \ | |
7b88fc08 PE |
327 | SOCAM_DATAWIDTH_12 | SOCAM_DATAWIDTH_15 | \ |
328 | SOCAM_DATAWIDTH_16 | SOCAM_DATAWIDTH_18 | \ | |
329 | SOCAM_DATAWIDTH_24) | |
ad5f2e85 | 330 | |
e26b3144 MN |
331 | static inline void soc_camera_limit_side(int *start, int *length, |
332 | unsigned int start_min, | |
6a6c8786 GL |
333 | unsigned int length_min, unsigned int length_max) |
334 | { | |
335 | if (*length < length_min) | |
336 | *length = length_min; | |
337 | else if (*length > length_max) | |
338 | *length = length_max; | |
339 | ||
340 | if (*start < start_min) | |
341 | *start = start_min; | |
342 | else if (*start > start_min + length_max - *length) | |
343 | *start = start_min + length_max - *length; | |
344 | } | |
345 | ||
25a34811 | 346 | unsigned long soc_camera_apply_board_flags(struct soc_camera_subdev_desc *ssdd, |
32c69fcc | 347 | const struct v4l2_mbus_config *cfg); |
bd73b36f | 348 | |
e09da11d | 349 | int soc_camera_power_init(struct device *dev, struct soc_camera_subdev_desc *ssdd); |
9aea470b GL |
350 | int soc_camera_power_on(struct device *dev, struct soc_camera_subdev_desc *ssdd, |
351 | struct v4l2_clk *clk); | |
352 | int soc_camera_power_off(struct device *dev, struct soc_camera_subdev_desc *ssdd, | |
353 | struct v4l2_clk *clk); | |
4ec10bac LP |
354 | |
355 | static inline int soc_camera_set_power(struct device *dev, | |
9aea470b | 356 | struct soc_camera_subdev_desc *ssdd, struct v4l2_clk *clk, bool on) |
4ec10bac | 357 | { |
9aea470b GL |
358 | return on ? soc_camera_power_on(dev, ssdd, clk) |
359 | : soc_camera_power_off(dev, ssdd, clk); | |
4ec10bac LP |
360 | } |
361 | ||
4f9fb5ed MCC |
362 | /* This is only temporary here - until v4l2-subdev begins to link to video_device */ |
363 | #include <linux/i2c.h> | |
14178aa5 | 364 | static inline struct video_device *soc_camera_i2c_to_vdev(const struct i2c_client *client) |
4f9fb5ed | 365 | { |
2f0babb7 | 366 | struct v4l2_subdev *sd = i2c_get_clientdata(client); |
4c0b036d | 367 | struct soc_camera_device *icd = v4l2_get_subdev_hostdata(sd); |
14178aa5 | 368 | return icd ? icd->vdev : NULL; |
4f9fb5ed MCC |
369 | } |
370 | ||
25a34811 | 371 | static inline struct soc_camera_subdev_desc *soc_camera_i2c_to_desc(const struct i2c_client *client) |
14178aa5 | 372 | { |
2f0babb7 | 373 | return client->dev.platform_data; |
14178aa5 GL |
374 | } |
375 | ||
14381c26 | 376 | static inline struct v4l2_subdev *soc_camera_vdev_to_subdev(struct video_device *vdev) |
14178aa5 | 377 | { |
14381c26 | 378 | struct soc_camera_device *icd = video_get_drvdata(vdev); |
14178aa5 GL |
379 | return soc_camera_to_subdev(icd); |
380 | } | |
381 | ||
14178aa5 | 382 | static inline struct soc_camera_device *soc_camera_from_vb2q(const struct vb2_queue *vq) |
8eb4476d GL |
383 | { |
384 | return container_of(vq, struct soc_camera_device, vb2_vidq); | |
385 | } | |
386 | ||
14178aa5 | 387 | static inline struct soc_camera_device *soc_camera_from_vbq(const struct videobuf_queue *vq) |
8eb4476d GL |
388 | { |
389 | return container_of(vq, struct soc_camera_device, vb_vidq); | |
390 | } | |
391 | ||
4c0b036d GL |
392 | static inline u32 soc_camera_grp_id(const struct soc_camera_device *icd) |
393 | { | |
394 | return (icd->iface << 8) | (icd->devnum + 1); | |
395 | } | |
396 | ||
592c2aba GL |
397 | void soc_camera_lock(struct vb2_queue *vq); |
398 | void soc_camera_unlock(struct vb2_queue *vq); | |
399 | ||
e55222ef | 400 | #endif |