2 * camera image capture (abstract) bus driver header
4 * Copyright (C) 2006, Sascha Hauer, Pengutronix
5 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
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.
15 #include <linux/device.h>
16 #include <linux/mutex.h>
18 #include <linux/videodev2.h>
19 #include <media/videobuf-core.h>
20 #include <media/videobuf2-core.h>
21 #include <media/v4l2-device.h>
23 extern struct bus_type soc_camera_bus_type;
27 struct soc_camera_device {
28 struct list_head list;
30 struct device *pdev; /* Platform device */
33 u32 bytesperline; /* for padding, zero if unused */
35 enum v4l2_colorspace colorspace;
36 unsigned char iface; /* Host number */
37 unsigned char devnum; /* Device number per host */
38 struct soc_camera_sense *sense; /* See comment in struct definition */
39 struct soc_camera_ops *ops;
40 struct video_device *vdev;
41 const struct soc_camera_format_xlate *current_fmt;
42 struct soc_camera_format_xlate *user_formats;
44 enum v4l2_field field; /* Preserve field over close() */
45 void *host_priv; /* Per-device host private data */
46 /* soc_camera.c private count. Only accessed with .video_lock held */
48 struct mutex video_lock; /* Protects device data */
49 struct file *streamer; /* stream owner */
51 struct videobuf_queue vb_vidq;
52 struct vb2_queue vb2_vidq;
56 struct soc_camera_host {
57 struct v4l2_device v4l2_dev;
58 struct list_head list;
59 unsigned char nr; /* Host number */
62 struct soc_camera_host_ops *ops;
65 struct soc_camera_host_ops {
67 int (*add)(struct soc_camera_device *);
68 void (*remove)(struct soc_camera_device *);
69 int (*suspend)(struct soc_camera_device *, pm_message_t);
70 int (*resume)(struct soc_camera_device *);
71 int (*enum_frameinervals)(struct soc_camera_device *, struct v4l2_frmivalenum *);/* ddl@rock-chips.com :Add ioctrl - VIDIOC_ENUM_FRAMEINTERVALS for soc-camera */
73 * .get_formats() is called for each client device format, but
74 * .put_formats() is only called once. Further, if any of the calls to
75 * .get_formats() fail, .put_formats() will not be called at all, the
76 * failing .get_formats() must then clean up internally.
78 int (*get_formats)(struct soc_camera_device *, unsigned int,
79 struct soc_camera_format_xlate *);
80 void (*put_formats)(struct soc_camera_device *);
81 int (*cropcap)(struct soc_camera_device *, struct v4l2_cropcap *);
82 int (*get_crop)(struct soc_camera_device *, struct v4l2_crop *);
83 int (*set_crop)(struct soc_camera_device *, struct v4l2_crop *);
85 * The difference to .set_crop() is, that .set_livecrop is not allowed
86 * to change the output sizes
88 int (*set_livecrop)(struct soc_camera_device *, struct v4l2_crop *);
89 int (*set_fmt)(struct soc_camera_device *, struct v4l2_format *);
90 int (*try_fmt)(struct soc_camera_device *, struct v4l2_format *);
91 void (*init_videobuf)(struct videobuf_queue *,
92 struct soc_camera_device *);
93 int (*init_videobuf2)(struct vb2_queue *,
94 struct soc_camera_device *);
95 int (*reqbufs)(struct soc_camera_device *, struct v4l2_requestbuffers *);
96 int (*querycap)(struct soc_camera_host *, struct v4l2_capability *);
97 int (*set_bus_param)(struct soc_camera_device *, __u32);
98 int (*get_ctrl)(struct soc_camera_device *, struct v4l2_control *);
99 int (*set_ctrl)(struct soc_camera_device *, struct v4l2_control *);
100 int (*get_parm)(struct soc_camera_device *, struct v4l2_streamparm *);
101 int (*set_parm)(struct soc_camera_device *, struct v4l2_streamparm *);
102 int (*enum_fsizes)(struct soc_camera_device *, struct v4l2_frmsizeenum *);
103 unsigned int (*poll)(struct file *, poll_table *);
104 const struct v4l2_queryctrl *controls;
107 int (*s_stream)(struct soc_camera_device *, int enable); /* ddl@rock-chips.com : Add stream control for host */
111 #define SOCAM_SENSOR_INVERT_PCLK (1 << 0)
112 #define SOCAM_SENSOR_INVERT_MCLK (1 << 1)
113 #define SOCAM_SENSOR_INVERT_HSYNC (1 << 2)
114 #define SOCAM_SENSOR_INVERT_VSYNC (1 << 3)
115 #define SOCAM_SENSOR_INVERT_DATA (1 << 4)
116 #define SOCAM_MIPI_1LANE (1 << 5)
117 #define SOCAM_MIPI_2LANE (1 << 6)
118 #define SOCAM_MIPI_3LANE (1 << 7)
119 #define SOCAM_MIPI_4LANE (1 << 8)
120 #define SOCAM_MIPI (SOCAM_MIPI_1LANE | SOCAM_MIPI_2LANE | \
121 SOCAM_MIPI_3LANE | SOCAM_MIPI_4LANE)
123 struct i2c_board_info;
124 struct regulator_bulk_data;
126 struct soc_camera_link {
127 /* Camera bus id, used to match a camera and a bus */
129 /* Per camera SOCAM_SENSOR_* bus flags */
132 struct i2c_board_info *board_info;
133 const char *module_name;
135 void *priv_usr; /* ddl@rock-chips.com: add priv_usr */
136 /* Optional regulators that have to be managed on power on/off events */
137 struct regulator_bulk_data *regulators;
141 * For non-I2C devices platform platform has to provide methods to
142 * add a device to the system and to remove
144 int (*add_device)(struct soc_camera_link *, struct device *);
145 void (*del_device)(struct soc_camera_link *);
146 /* Optional callbacks to power on or off and reset the sensor */
147 int (*power)(struct device *, int);
148 int (*reset)(struct device *);
149 int (*powerdown)(struct device *, int); /* ddl@rock-chisp.com : support sensor powerdown */
151 * some platforms may support different data widths than the sensors
152 * native ones due to different data line routing. Let the board code
153 * overwrite the width flags.
155 int (*set_bus_param)(struct soc_camera_link *, unsigned long flags);
156 unsigned long (*query_bus_param)(struct soc_camera_link *);
157 void (*free_bus)(struct soc_camera_link *);
160 static inline struct soc_camera_device *to_soc_camera_dev(
161 const struct device *dev)
163 return container_of(dev, struct soc_camera_device, dev);
166 static inline struct soc_camera_host *to_soc_camera_host(
167 const struct device *dev)
169 struct v4l2_device *v4l2_dev = dev_get_drvdata(dev);
171 return container_of(v4l2_dev, struct soc_camera_host, v4l2_dev);
174 static inline struct soc_camera_link *to_soc_camera_link(
175 const struct soc_camera_device *icd)
177 return icd->dev.platform_data;
180 static inline struct device *to_soc_camera_control(
181 const struct soc_camera_device *icd)
183 return dev_get_drvdata(&icd->dev);
186 static inline struct v4l2_subdev *soc_camera_to_subdev(
187 const struct soc_camera_device *icd)
189 struct device *control = to_soc_camera_control(icd);
190 return dev_get_drvdata(control);
193 int soc_camera_host_register(struct soc_camera_host *ici);
194 void soc_camera_host_unregister(struct soc_camera_host *ici);
196 const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc(
197 struct soc_camera_device *icd, unsigned int fourcc);
200 * struct soc_camera_format_xlate - match between host and sensor formats
201 * @code: code of a sensor provided format
202 * @host_fmt: host format after host translation from code
204 * Host and sensor translation structure. Used in table of host and sensor
205 * formats matchings in soc_camera_device. A host can override the generic list
206 * generation by implementing get_formats(), and use it for format checks and
209 struct soc_camera_format_xlate {
210 enum v4l2_mbus_pixelcode code;
211 const struct soc_mbus_pixelfmt *host_fmt;
214 struct soc_camera_ops {
215 int (*suspend)(struct soc_camera_device *, pm_message_t state);
216 int (*resume)(struct soc_camera_device *);
217 unsigned long (*query_bus_param)(struct soc_camera_device *);
218 int (*set_bus_param)(struct soc_camera_device *, unsigned long);
219 int (*enum_input)(struct soc_camera_device *, struct v4l2_input *);
221 const struct v4l2_queryctrl *controls;
222 struct v4l2_querymenu *menus; /* ddl@rock-chips.com : Add ioctrl -VIDIOC_QUERYMENU */
224 int num_menus; /* ddl@rock-chips.com : Add ioctrl -VIDIOC_QUERYMENU */
227 #define SOCAM_SENSE_PCLK_CHANGED (1 << 0)
230 * This struct can be attached to struct soc_camera_device by the host driver
231 * to request sense from the camera, for example, when calling .set_fmt(). The
232 * host then can check which flags are set and verify respective values if any.
233 * For example, if SOCAM_SENSE_PCLK_CHANGED is set, it means, pixclock has
234 * changed during this operation. After completion the host should detach sense.
236 * @flags ored SOCAM_SENSE_* flags
237 * @master_clock if the host wants to be informed about pixel-clock
238 * change, it better set master_clock.
239 * @pixel_clock_max maximum pixel clock frequency supported by the host,
240 * camera is not allowed to exceed this.
241 * @pixel_clock if the camera driver changed pixel clock during this
242 * operation, it sets SOCAM_SENSE_PCLK_CHANGED, uses
243 * master_clock to calculate the new pixel-clock and
246 struct soc_camera_sense {
248 unsigned long master_clock;
249 unsigned long pixel_clock_max;
250 unsigned long pixel_clock;
253 static inline struct v4l2_queryctrl const *soc_camera_find_qctrl(
254 struct soc_camera_ops *ops, int id)
258 for (i = 0; i < ops->num_controls; i++)
259 if (ops->controls[i].id == id)
260 return &ops->controls[i];
265 #define SOCAM_MASTER (1 << 0)
266 #define SOCAM_SLAVE (1 << 1)
267 #define SOCAM_HSYNC_ACTIVE_HIGH (1 << 2)
268 #define SOCAM_HSYNC_ACTIVE_LOW (1 << 3)
269 #define SOCAM_VSYNC_ACTIVE_HIGH (1 << 4)
270 #define SOCAM_VSYNC_ACTIVE_LOW (1 << 5)
271 #define SOCAM_DATAWIDTH_4 (1 << 6)
272 #define SOCAM_DATAWIDTH_8 (1 << 7)
273 #define SOCAM_DATAWIDTH_9 (1 << 8)
274 #define SOCAM_DATAWIDTH_10 (1 << 9)
275 #define SOCAM_DATAWIDTH_15 (1 << 10)
276 #define SOCAM_DATAWIDTH_16 (1 << 11)
277 #define SOCAM_PCLK_SAMPLE_RISING (1 << 12)
278 #define SOCAM_PCLK_SAMPLE_FALLING (1 << 13)
279 #define SOCAM_DATA_ACTIVE_HIGH (1 << 14)
280 #define SOCAM_DATA_ACTIVE_LOW (1 << 15)
282 #define SOCAM_MCLK_24MHZ (1<<29) /* ddl@rock-chips.com : add */
283 #define SOCAM_MCLK_27MHZ (1<<30)
284 #define SOCAM_MCLK_48MHZ (1<<31)
286 #define SOCAM_DATAWIDTH_MASK (SOCAM_DATAWIDTH_4 | SOCAM_DATAWIDTH_8 | \
287 SOCAM_DATAWIDTH_9 | SOCAM_DATAWIDTH_10 | \
288 SOCAM_DATAWIDTH_15 | SOCAM_DATAWIDTH_16)
290 static inline unsigned long soc_camera_bus_param_compatible(
291 unsigned long camera_flags, unsigned long bus_flags)
293 unsigned long common_flags, hsync, vsync, pclk, data, buswidth, mode;
296 common_flags = camera_flags & bus_flags;
298 hsync = common_flags & (SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW);
299 vsync = common_flags & (SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW);
300 pclk = common_flags & (SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING);
301 data = common_flags & (SOCAM_DATA_ACTIVE_HIGH | SOCAM_DATA_ACTIVE_LOW);
302 mode = common_flags & (SOCAM_MASTER | SOCAM_SLAVE);
303 buswidth = common_flags & SOCAM_DATAWIDTH_MASK;
304 mipi = common_flags & SOCAM_MIPI;
306 return ((!hsync || !vsync || !pclk || !data || !mode || !buswidth) && !mipi) ? 0 :
310 static inline void soc_camera_limit_side(int *start, int *length,
311 unsigned int start_min,
312 unsigned int length_min, unsigned int length_max)
314 if (*length < length_min)
315 *length = length_min;
316 else if (*length > length_max)
317 *length = length_max;
319 if (*start < start_min)
321 else if (*start > start_min + length_max - *length)
322 *start = start_min + length_max - *length;
325 extern unsigned long soc_camera_apply_sensor_flags(struct soc_camera_link *icl,
326 unsigned long flags);
328 /* This is only temporary here - until v4l2-subdev begins to link to video_device */
329 #include <linux/i2c.h>
330 static inline struct video_device *soc_camera_i2c_to_vdev(struct i2c_client *client)
332 struct soc_camera_device *icd = client->dev.platform_data;
336 static inline struct soc_camera_device *soc_camera_from_vb2q(struct vb2_queue *vq)
338 return container_of(vq, struct soc_camera_device, vb2_vidq);
341 static inline struct soc_camera_device *soc_camera_from_vbq(struct videobuf_queue *vq)
343 return container_of(vq, struct soc_camera_device, vb_vidq);
346 void soc_camera_lock(struct vb2_queue *vq);
347 void soc_camera_unlock(struct vb2_queue *vq);