288 lines
9.6 KiB
C
288 lines
9.6 KiB
C
/*
|
|
* camera image capture (abstract) bus driver header
|
|
*
|
|
* Copyright (C) 2006, Sascha Hauer, Pengutronix
|
|
* Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#ifndef SOC_CAMERA_H
|
|
#define SOC_CAMERA_H
|
|
|
|
#include <linux/mutex.h>
|
|
#include <linux/pm.h>
|
|
#include <linux/videodev2.h>
|
|
#include <media/videobuf-core.h>
|
|
#include <media/v4l2-device.h>
|
|
|
|
struct soc_camera_device {
|
|
struct list_head list;
|
|
struct device dev;
|
|
struct device *pdev; /* Platform device */
|
|
s32 user_width;
|
|
s32 user_height;
|
|
enum v4l2_colorspace colorspace;
|
|
unsigned char iface; /* Host number */
|
|
unsigned char devnum; /* Device number per host */
|
|
struct soc_camera_sense *sense; /* See comment in struct definition */
|
|
struct soc_camera_ops *ops;
|
|
struct video_device *vdev;
|
|
const struct soc_camera_format_xlate *current_fmt;
|
|
struct soc_camera_format_xlate *user_formats;
|
|
int num_user_formats;
|
|
enum v4l2_field field; /* Preserve field over close() */
|
|
void *host_priv; /* Per-device host private data */
|
|
/* soc_camera.c private count. Only accessed with .video_lock held */
|
|
int use_count;
|
|
struct mutex video_lock; /* Protects device data */
|
|
};
|
|
|
|
struct soc_camera_file {
|
|
struct soc_camera_device *icd;
|
|
struct videobuf_queue vb_vidq;
|
|
};
|
|
|
|
struct soc_camera_host {
|
|
struct v4l2_device v4l2_dev;
|
|
struct list_head list;
|
|
unsigned char nr; /* Host number */
|
|
void *priv;
|
|
const char *drv_name;
|
|
struct soc_camera_host_ops *ops;
|
|
};
|
|
|
|
struct soc_camera_host_ops {
|
|
struct module *owner;
|
|
int (*add)(struct soc_camera_device *);
|
|
void (*remove)(struct soc_camera_device *);
|
|
int (*suspend)(struct soc_camera_device *, pm_message_t);
|
|
int (*resume)(struct soc_camera_device *);
|
|
/*
|
|
* .get_formats() is called for each client device format, but
|
|
* .put_formats() is only called once. Further, if any of the calls to
|
|
* .get_formats() fail, .put_formats() will not be called at all, the
|
|
* failing .get_formats() must then clean up internally.
|
|
*/
|
|
int (*get_formats)(struct soc_camera_device *, int,
|
|
struct soc_camera_format_xlate *);
|
|
void (*put_formats)(struct soc_camera_device *);
|
|
int (*cropcap)(struct soc_camera_device *, struct v4l2_cropcap *);
|
|
int (*get_crop)(struct soc_camera_device *, struct v4l2_crop *);
|
|
int (*set_crop)(struct soc_camera_device *, struct v4l2_crop *);
|
|
int (*set_fmt)(struct soc_camera_device *, struct v4l2_format *);
|
|
int (*try_fmt)(struct soc_camera_device *, struct v4l2_format *);
|
|
void (*init_videobuf)(struct videobuf_queue *,
|
|
struct soc_camera_device *);
|
|
int (*reqbufs)(struct soc_camera_file *, struct v4l2_requestbuffers *);
|
|
int (*querycap)(struct soc_camera_host *, struct v4l2_capability *);
|
|
int (*set_bus_param)(struct soc_camera_device *, __u32);
|
|
int (*get_ctrl)(struct soc_camera_device *, struct v4l2_control *);
|
|
int (*set_ctrl)(struct soc_camera_device *, struct v4l2_control *);
|
|
int (*get_parm)(struct soc_camera_device *, struct v4l2_streamparm *);
|
|
int (*set_parm)(struct soc_camera_device *, struct v4l2_streamparm *);
|
|
unsigned int (*poll)(struct file *, poll_table *);
|
|
const struct v4l2_queryctrl *controls;
|
|
int num_controls;
|
|
};
|
|
|
|
#define SOCAM_SENSOR_INVERT_PCLK (1 << 0)
|
|
#define SOCAM_SENSOR_INVERT_MCLK (1 << 1)
|
|
#define SOCAM_SENSOR_INVERT_HSYNC (1 << 2)
|
|
#define SOCAM_SENSOR_INVERT_VSYNC (1 << 3)
|
|
#define SOCAM_SENSOR_INVERT_DATA (1 << 4)
|
|
|
|
struct i2c_board_info;
|
|
|
|
struct soc_camera_link {
|
|
/* Camera bus id, used to match a camera and a bus */
|
|
int bus_id;
|
|
/* Per camera SOCAM_SENSOR_* bus flags */
|
|
unsigned long flags;
|
|
int i2c_adapter_id;
|
|
struct i2c_board_info *board_info;
|
|
const char *module_name;
|
|
void *priv;
|
|
|
|
/*
|
|
* For non-I2C devices platform platform has to provide methods to
|
|
* add a device to the system and to remove
|
|
*/
|
|
int (*add_device)(struct soc_camera_link *, struct device *);
|
|
void (*del_device)(struct soc_camera_link *);
|
|
/* Optional callbacks to power on or off and reset the sensor */
|
|
int (*power)(struct device *, int);
|
|
int (*reset)(struct device *);
|
|
/*
|
|
* some platforms may support different data widths than the sensors
|
|
* native ones due to different data line routing. Let the board code
|
|
* overwrite the width flags.
|
|
*/
|
|
int (*set_bus_param)(struct soc_camera_link *, unsigned long flags);
|
|
unsigned long (*query_bus_param)(struct soc_camera_link *);
|
|
void (*free_bus)(struct soc_camera_link *);
|
|
};
|
|
|
|
static inline struct soc_camera_device *to_soc_camera_dev(
|
|
const struct device *dev)
|
|
{
|
|
return container_of(dev, struct soc_camera_device, dev);
|
|
}
|
|
|
|
static inline struct soc_camera_host *to_soc_camera_host(
|
|
const struct device *dev)
|
|
{
|
|
struct v4l2_device *v4l2_dev = dev_get_drvdata(dev);
|
|
|
|
return container_of(v4l2_dev, struct soc_camera_host, v4l2_dev);
|
|
}
|
|
|
|
static inline struct soc_camera_link *to_soc_camera_link(
|
|
const struct soc_camera_device *icd)
|
|
{
|
|
return icd->dev.platform_data;
|
|
}
|
|
|
|
static inline struct device *to_soc_camera_control(
|
|
const struct soc_camera_device *icd)
|
|
{
|
|
return dev_get_drvdata(&icd->dev);
|
|
}
|
|
|
|
static inline struct v4l2_subdev *soc_camera_to_subdev(
|
|
const struct soc_camera_device *icd)
|
|
{
|
|
struct device *control = to_soc_camera_control(icd);
|
|
return dev_get_drvdata(control);
|
|
}
|
|
|
|
int soc_camera_host_register(struct soc_camera_host *ici);
|
|
void soc_camera_host_unregister(struct soc_camera_host *ici);
|
|
|
|
const struct soc_camera_format_xlate *soc_camera_xlate_by_fourcc(
|
|
struct soc_camera_device *icd, unsigned int fourcc);
|
|
|
|
/**
|
|
* struct soc_camera_format_xlate - match between host and sensor formats
|
|
* @code: code of a sensor provided format
|
|
* @host_fmt: host format after host translation from code
|
|
*
|
|
* Host and sensor translation structure. Used in table of host and sensor
|
|
* formats matchings in soc_camera_device. A host can override the generic list
|
|
* generation by implementing get_formats(), and use it for format checks and
|
|
* format setup.
|
|
*/
|
|
struct soc_camera_format_xlate {
|
|
enum v4l2_mbus_pixelcode code;
|
|
const struct soc_mbus_pixelfmt *host_fmt;
|
|
};
|
|
|
|
struct soc_camera_ops {
|
|
int (*suspend)(struct soc_camera_device *, pm_message_t state);
|
|
int (*resume)(struct soc_camera_device *);
|
|
unsigned long (*query_bus_param)(struct soc_camera_device *);
|
|
int (*set_bus_param)(struct soc_camera_device *, unsigned long);
|
|
int (*enum_input)(struct soc_camera_device *, struct v4l2_input *);
|
|
const struct v4l2_queryctrl *controls;
|
|
int num_controls;
|
|
};
|
|
|
|
#define SOCAM_SENSE_PCLK_CHANGED (1 << 0)
|
|
|
|
/**
|
|
* This struct can be attached to struct soc_camera_device by the host driver
|
|
* to request sense from the camera, for example, when calling .set_fmt(). The
|
|
* host then can check which flags are set and verify respective values if any.
|
|
* For example, if SOCAM_SENSE_PCLK_CHANGED is set, it means, pixclock has
|
|
* changed during this operation. After completion the host should detach sense.
|
|
*
|
|
* @flags ored SOCAM_SENSE_* flags
|
|
* @master_clock if the host wants to be informed about pixel-clock
|
|
* change, it better set master_clock.
|
|
* @pixel_clock_max maximum pixel clock frequency supported by the host,
|
|
* camera is not allowed to exceed this.
|
|
* @pixel_clock if the camera driver changed pixel clock during this
|
|
* operation, it sets SOCAM_SENSE_PCLK_CHANGED, uses
|
|
* master_clock to calculate the new pixel-clock and
|
|
* sets this field.
|
|
*/
|
|
struct soc_camera_sense {
|
|
unsigned long flags;
|
|
unsigned long master_clock;
|
|
unsigned long pixel_clock_max;
|
|
unsigned long pixel_clock;
|
|
};
|
|
|
|
static inline struct v4l2_queryctrl const *soc_camera_find_qctrl(
|
|
struct soc_camera_ops *ops, int id)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ops->num_controls; i++)
|
|
if (ops->controls[i].id == id)
|
|
return &ops->controls[i];
|
|
|
|
return NULL;
|
|
}
|
|
|
|
#define SOCAM_MASTER (1 << 0)
|
|
#define SOCAM_SLAVE (1 << 1)
|
|
#define SOCAM_HSYNC_ACTIVE_HIGH (1 << 2)
|
|
#define SOCAM_HSYNC_ACTIVE_LOW (1 << 3)
|
|
#define SOCAM_VSYNC_ACTIVE_HIGH (1 << 4)
|
|
#define SOCAM_VSYNC_ACTIVE_LOW (1 << 5)
|
|
#define SOCAM_DATAWIDTH_4 (1 << 6)
|
|
#define SOCAM_DATAWIDTH_8 (1 << 7)
|
|
#define SOCAM_DATAWIDTH_9 (1 << 8)
|
|
#define SOCAM_DATAWIDTH_10 (1 << 9)
|
|
#define SOCAM_DATAWIDTH_15 (1 << 10)
|
|
#define SOCAM_DATAWIDTH_16 (1 << 11)
|
|
#define SOCAM_PCLK_SAMPLE_RISING (1 << 12)
|
|
#define SOCAM_PCLK_SAMPLE_FALLING (1 << 13)
|
|
#define SOCAM_DATA_ACTIVE_HIGH (1 << 14)
|
|
#define SOCAM_DATA_ACTIVE_LOW (1 << 15)
|
|
|
|
#define SOCAM_DATAWIDTH_MASK (SOCAM_DATAWIDTH_4 | SOCAM_DATAWIDTH_8 | \
|
|
SOCAM_DATAWIDTH_9 | SOCAM_DATAWIDTH_10 | \
|
|
SOCAM_DATAWIDTH_15 | SOCAM_DATAWIDTH_16)
|
|
|
|
static inline unsigned long soc_camera_bus_param_compatible(
|
|
unsigned long camera_flags, unsigned long bus_flags)
|
|
{
|
|
unsigned long common_flags, hsync, vsync, pclk, data, buswidth, mode;
|
|
|
|
common_flags = camera_flags & bus_flags;
|
|
|
|
hsync = common_flags & (SOCAM_HSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_LOW);
|
|
vsync = common_flags & (SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW);
|
|
pclk = common_flags & (SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING);
|
|
data = common_flags & (SOCAM_DATA_ACTIVE_HIGH | SOCAM_DATA_ACTIVE_LOW);
|
|
mode = common_flags & (SOCAM_MASTER | SOCAM_SLAVE);
|
|
buswidth = common_flags & SOCAM_DATAWIDTH_MASK;
|
|
|
|
return (!hsync || !vsync || !pclk || !data || !mode || !buswidth) ? 0 :
|
|
common_flags;
|
|
}
|
|
|
|
static inline void soc_camera_limit_side(unsigned int *start,
|
|
unsigned int *length, unsigned int start_min,
|
|
unsigned int length_min, unsigned int length_max)
|
|
{
|
|
if (*length < length_min)
|
|
*length = length_min;
|
|
else if (*length > length_max)
|
|
*length = length_max;
|
|
|
|
if (*start < start_min)
|
|
*start = start_min;
|
|
else if (*start > start_min + length_max - *length)
|
|
*start = start_min + length_max - *length;
|
|
}
|
|
|
|
extern unsigned long soc_camera_apply_sensor_flags(struct soc_camera_link *icl,
|
|
unsigned long flags);
|
|
|
|
#endif
|