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/v4l2-device.h>
22 extern struct bus_type soc_camera_bus_type;
24 struct soc_camera_device {
25 struct list_head list;
27 struct device *pdev; /* Platform device */
30 enum v4l2_colorspace colorspace;
31 unsigned char iface; /* Host number */
32 unsigned char devnum; /* Device number per host */
33 struct soc_camera_sense *sense; /* See comment in struct definition */
34 struct soc_camera_ops *ops;
35 struct video_device *vdev;
36 const struct soc_camera_format_xlate *current_fmt;
37 struct soc_camera_format_xlate *user_formats;
39 enum v4l2_field field; /* Preserve field over close() */
40 void *host_priv; /* Per-device host private data */
41 /* soc_camera.c private count. Only accessed with .video_lock held */
43 struct mutex video_lock; /* Protects device data */
46 struct soc_camera_file {
47 struct soc_camera_device *icd;
48 struct videobuf_queue vb_vidq;
51 struct soc_camera_host {
52 struct v4l2_device v4l2_dev;
53 struct list_head list;
54 unsigned char nr; /* Host number */
57 struct soc_camera_host_ops *ops;
60 struct soc_camera_host_ops {
62 int (*add)(struct soc_camera_device *);
63 void (*remove)(struct soc_camera_device *);
64 int (*suspend)(struct soc_camera_device *, pm_message_t);
65 int (*resume)(struct soc_camera_device *);
66 int (*enum_frameinervals)(struct soc_camera_device *, struct v4l2_frmivalenum *);
68 * .get_formats() is called for each client device format, but
69 * .put_formats() is only called once. Further, if any of the calls to
70 * .get_formats() fail, .put_formats() will not be called at all, the
71 * failing .get_formats() must then clean up internally.
73 int (*get_formats)(struct soc_camera_device *, unsigned int,
74 struct soc_camera_format_xlate *);
75 void (*put_formats)(struct soc_camera_device *);
76 int (*cropcap)(struct soc_camera_device *, struct v4l2_cropcap *);
77 int (*get_crop)(struct soc_camera_device *, struct v4l2_crop *);
78 int (*set_crop)(struct soc_camera_device *, struct v4l2_crop *);
79 int (*set_fmt)(struct soc_camera_device *, struct v4l2_format *);
80 int (*try_fmt)(struct soc_camera_device *, struct v4l2_format *);
81 void (*init_videobuf)(struct videobuf_queue *,
82 struct soc_camera_device *);
83 int (*reqbufs)(struct soc_camera_file *, struct v4l2_requestbuffers *);
84 int (*querycap)(struct soc_camera_host *, struct v4l2_capability *);
85 int (*set_bus_param)(struct soc_camera_device *, __u32);
86 int (*get_ctrl)(struct soc_camera_device *, struct v4l2_control *);
87 int (*set_ctrl)(struct soc_camera_device *, struct v4l2_control *);
88 int (*get_parm)(struct soc_camera_device *, struct v4l2_streamparm *);
89 int (*set_parm)(struct soc_camera_device *, struct v4l2_streamparm *);
90 unsigned int (*poll)(struct file *, poll_table *);
91 const struct v4l2_queryctrl *controls;
94 int (*s_stream)(struct soc_camera_device *, int enable); /* ddl@rock-chips.com : Add stream control for host */
98 #define SOCAM_SENSOR_INVERT_PCLK (1 << 0)
99 #define SOCAM_SENSOR_INVERT_MCLK (1 << 1)
100 #define SOCAM_SENSOR_INVERT_HSYNC (1 << 2)
101 #define SOCAM_SENSOR_INVERT_VSYNC (1 << 3)
102 #define SOCAM_SENSOR_INVERT_DATA (1 << 4)
104 struct i2c_board_info;
106 struct soc_camera_link {
107 /* Camera bus id, used to match a camera and a bus */
109 /* Per camera SOCAM_SENSOR_* bus flags */
112 struct i2c_board_info *board_info;
113 const char *module_name;
117 * For non-I2C devices platform platform has to provide methods to
118 * add a device to the system and to remove
120 int (*add_device)(struct soc_camera_link *, struct device *);
121 void (*del_device)(struct soc_camera_link *);
122 /* Optional callbacks to power on or off and reset the sensor */
123 int (*power)(struct device *, int);
124 int (*reset)(struct device *);
125 int (*powerdown)(struct device *, int); /* ddl@rock-chisp.com : support sensor powerdown */
127 * some platforms may support different data widths than the sensors
128 * native ones due to different data line routing. Let the board code
129 * overwrite the width flags.
131 int (*set_bus_param)(struct soc_camera_link *, unsigned long flags);
132 unsigned long (*query_bus_param)(struct soc_camera_link *);
133 void (*free_bus)(struct soc_camera_link *);
136 static inline struct soc_camera_device *to_soc_camera_dev(
137 const struct device *dev)
139 return container_of(dev, struct soc_camera_device, dev);
142 static inline struct soc_camera_host *to_soc_camera_host(
143 const struct device *dev)
145 struct v4l2_device *v4l2_dev = dev_get_drvdata(dev);
147 return container_of(v4l2_dev, struct soc_camera_host, v4l2_dev);
150 static inline struct soc_camera_link *to_soc_camera_link(
151 const struct soc_camera_device *icd)
153 return icd->dev.platform_data;
156 static inline struct device *to_soc_camera_control(
157 const struct soc_camera_device *icd)
159 return dev_get_drvdata(&icd->dev);
162 static inline struct v4l2_subdev *soc_camera_to_subdev(
163 const struct soc_camera_device *icd)
165 struct device *control = to_soc_camera_control(icd);
166 return dev_get_drvdata(control);
169 int soc_camera_host_register(struct soc_camera_host *ici);
170 void soc_camera_host_unregister(struct soc_camera_host *ici);
172 const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc(
173 struct soc_camera_device *icd, unsigned int fourcc);
176 * struct soc_camera_format_xlate - match between host and sensor formats
177 * @code: code of a sensor provided format
178 * @host_fmt: host format after host translation from code
180 * Host and sensor translation structure. Used in table of host and sensor
181 * formats matchings in soc_camera_device. A host can override the generic list
182 * generation by implementing get_formats(), and use it for format checks and
185 struct soc_camera_format_xlate {
186 enum v4l2_mbus_pixelcode code;
187 const struct soc_mbus_pixelfmt *host_fmt;
190 struct soc_camera_ops {
191 int (*suspend)(struct soc_camera_device *, pm_message_t state);
192 int (*resume)(struct soc_camera_device *);
193 unsigned long (*query_bus_param)(struct soc_camera_device *);
194 int (*set_bus_param)(struct soc_camera_device *, unsigned long);
195 int (*enum_input)(struct soc_camera_device *, struct v4l2_input *);
197 const struct v4l2_queryctrl *controls;
198 const struct v4l2_querymenu *menus; /* ddl@rock-chips.com : Add ioctrl -VIDIOC_QUERYMENU */
200 int num_menus; /* ddl@rock-chips.com : Add ioctrl -VIDIOC_QUERYMENU */
203 #define SOCAM_SENSE_PCLK_CHANGED (1 << 0)
206 * This struct can be attached to struct soc_camera_device by the host driver
207 * to request sense from the camera, for example, when calling .set_fmt(). The
208 * host then can check which flags are set and verify respective values if any.
209 * For example, if SOCAM_SENSE_PCLK_CHANGED is set, it means, pixclock has
210 * changed during this operation. After completion the host should detach sense.
212 * @flags ored SOCAM_SENSE_* flags
213 * @master_clock if the host wants to be informed about pixel-clock
214 * change, it better set master_clock.
215 * @pixel_clock_max maximum pixel clock frequency supported by the host,
216 * camera is not allowed to exceed this.
217 * @pixel_clock if the camera driver changed pixel clock during this
218 * operation, it sets SOCAM_SENSE_PCLK_CHANGED, uses
219 * master_clock to calculate the new pixel-clock and
222 struct soc_camera_sense {
224 unsigned long master_clock;
225 unsigned long pixel_clock_max;
226 unsigned long pixel_clock;
229 static inline struct v4l2_queryctrl const *soc_camera_find_qctrl(
230 struct soc_camera_ops *ops, int id)
234 for (i = 0; i < ops->num_controls; i++)
235 if (ops->controls[i].id == id)
236 return &ops->controls[i];
241 #define SOCAM_MASTER (1 << 0)
242 #define SOCAM_SLAVE (1 << 1)
243 #define SOCAM_HSYNC_ACTIVE_HIGH (1 << 2)
244 #define SOCAM_HSYNC_ACTIVE_LOW (1 << 3)
245 #define SOCAM_VSYNC_ACTIVE_HIGH (1 << 4)
246 #define SOCAM_VSYNC_ACTIVE_LOW (1 << 5)
247 #define SOCAM_DATAWIDTH_4 (1 << 6)
248 #define SOCAM_DATAWIDTH_8 (1 << 7)
249 #define SOCAM_DATAWIDTH_9 (1 << 8)
250 #define SOCAM_DATAWIDTH_10 (1 << 9)
251 #define SOCAM_DATAWIDTH_15 (1 << 10)
252 #define SOCAM_DATAWIDTH_16 (1 << 11)
253 #define SOCAM_PCLK_SAMPLE_RISING (1 << 12)
254 #define SOCAM_PCLK_SAMPLE_FALLING (1 << 13)
255 #define SOCAM_DATA_ACTIVE_HIGH (1 << 14)
256 #define SOCAM_DATA_ACTIVE_LOW (1 << 15)
258 #define SOCAM_MCLK_24MHZ (1<<29) /* ddl@rock-chips.com : add */
259 #define SOCAM_MCLK_27MHZ (1<<30)
260 #define SOCAM_MCLK_48MHZ (1<<31)
262 #define SOCAM_DATAWIDTH_MASK (SOCAM_DATAWIDTH_4 | SOCAM_DATAWIDTH_8 | \
263 SOCAM_DATAWIDTH_9 | SOCAM_DATAWIDTH_10 | \
264 SOCAM_DATAWIDTH_15 | SOCAM_DATAWIDTH_16)
266 static inline unsigned long soc_camera_bus_param_compatible(
267 unsigned long camera_flags, unsigned long bus_flags)
269 unsigned long common_flags, hsync, vsync, pclk, data, buswidth, mode;
271 common_flags = camera_flags & bus_flags;
273 hsync = common_flags & (SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW);
274 vsync = common_flags & (SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW);
275 pclk = common_flags & (SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING);
276 data = common_flags & (SOCAM_DATA_ACTIVE_HIGH | SOCAM_DATA_ACTIVE_LOW);
277 mode = common_flags & (SOCAM_MASTER | SOCAM_SLAVE);
278 buswidth = common_flags & SOCAM_DATAWIDTH_MASK;
280 return (!hsync || !vsync || !pclk || !data || !mode || !buswidth) ? 0 :
284 static inline void soc_camera_limit_side(int *start, int *length,
285 unsigned int start_min,
286 unsigned int length_min, unsigned int length_max)
288 if (*length < length_min)
289 *length = length_min;
290 else if (*length > length_max)
291 *length = length_max;
293 if (*start < start_min)
295 else if (*start > start_min + length_max - *length)
296 *start = start_min + length_max - *length;
299 extern unsigned long soc_camera_apply_sensor_flags(struct soc_camera_link *icl,
300 unsigned long flags);
302 /* This is only temporary here - until v4l2-subdev begins to link to video_device */
303 #include <linux/i2c.h>
304 static inline struct video_device *soc_camera_i2c_to_vdev(struct i2c_client *client)
306 struct soc_camera_device *icd = client->dev.platform_data;