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/*
* 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/bitops.h>
#include <linux/device.h>
#include <linux/mutex.h>
#include <linux/pm.h>
#include <linux/videodev2.h>
#include <media/videobuf-core.h>
#include <media/videobuf2-v4l2.h>
#include <media/v4l2-async.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
struct file;
struct soc_camera_desc;
struct soc_camera_async_client;
struct soc_camera_device {
struct list_head list; /* list of all registered devices */
struct soc_camera_desc *sdesc;
struct device *pdev; /* Platform device */
struct device *parent; /* Camera host device */
struct device *control; /* E.g., the i2c client */
s32 user_width;
s32 user_height;
u32 bytesperline; /* for padding, zero if unused */
u32 sizeimage;
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 video_device *vdev;
struct v4l2_ctrl_handler ctrl_handler;
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 .host_lock held */
int use_count;
struct file *streamer; /* stream owner */
struct v4l2_clk *clk;
/* Asynchronous subdevice management */
struct soc_camera_async_client *sasc;
/* video buffer queue */
union {
struct videobuf_queue vb_vidq;
struct vb2_queue vb2_vidq;
};
};
/* Host supports programmable stride */
#define SOCAM_HOST_CAP_STRIDE (1 << 0)
enum soc_camera_subdev_role {
SOCAM_SUBDEV_DATA_SOURCE = 1,
SOCAM_SUBDEV_DATA_SINK,
SOCAM_SUBDEV_DATA_PROCESSOR,
};
struct soc_camera_async_subdev {
struct v4l2_async_subdev asd;
enum soc_camera_subdev_role role;
};
struct soc_camera_host {
struct v4l2_device v4l2_dev;
struct list_head list;
struct mutex host_lock; /* Main synchronisation lock */
struct mutex clk_lock; /* Protect pipeline modifications */
unsigned char nr; /* Host number */
u32 capabilities;
struct soc_camera_device *icd; /* Currently attached client */
void *priv;
const char *drv_name;
struct soc_camera_host_ops *ops;
struct v4l2_async_subdev **asd; /* Flat array, arranged in groups */
unsigned int *asd_sizes; /* 0-terminated array of asd group sizes */
};
struct soc_camera_host_ops {
struct module *owner;
int (*add)(struct soc_camera_device *);
void (*remove)(struct soc_camera_device *);
int (*clock_start)(struct soc_camera_host *);
void (*clock_stop)(struct soc_camera_host *);
/*
* .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 *, unsigned int,
struct soc_camera_format_xlate *);
void (*put_formats)(struct soc_camera_device *);
int (*get_selection)(struct soc_camera_device *, struct v4l2_selection *);
int (*set_selection)(struct soc_camera_device *, struct v4l2_selection *);
/*
* The difference to .set_selection() is, that .set_liveselection is not allowed
* to change the output sizes
*/
int (*set_liveselection)(struct soc_camera_device *, struct v4l2_selection *);
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 (*init_videobuf2)(struct vb2_queue *,
struct soc_camera_device *);
int (*reqbufs)(struct soc_camera_device *, struct v4l2_requestbuffers *);
int (*querycap)(struct soc_camera_host *, struct v4l2_capability *);
int (*set_bus_param)(struct soc_camera_device *);
int (*get_parm)(struct soc_camera_device *, struct v4l2_streamparm *);
int (*set_parm)(struct soc_camera_device *, struct v4l2_streamparm *);
int (*enum_framesizes)(struct soc_camera_device *, struct v4l2_frmsizeenum *);
unsigned int (*poll)(struct file *, poll_table *);
};
#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 regulator_bulk_data;
struct soc_camera_subdev_desc {
/* Per camera SOCAM_SENSOR_* bus flags */
unsigned long flags;
/* sensor driver private platform data */
void *drv_priv;
/*
* Set unbalanced_power to true to deal with legacy drivers, failing to
* balance their calls to subdevice's .s_power() method. clock_state is
* then used internally by helper functions, it shouldn't be touched by
* drivers or the platform code.
*/
bool unbalanced_power;
unsigned long clock_state;
/* 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_subdev_desc *, unsigned long flags);
unsigned long (*query_bus_param)(struct soc_camera_subdev_desc *);
void (*free_bus)(struct soc_camera_subdev_desc *);
/* Optional regulators that have to be managed on power on/off events */
struct v4l2_subdev_platform_data sd_pdata;
};
struct soc_camera_host_desc {
/* Camera bus id, used to match a camera and a bus */
int bus_id;
int i2c_adapter_id;
struct i2c_board_info *board_info;
const char *module_name;
/*
* For non-I2C devices platform has to provide methods to add a device
* to the system and to remove it
*/
int (*add_device)(struct soc_camera_device *);
void (*del_device)(struct soc_camera_device *);
};
/*
* Platform data for "soc-camera-pdrv"
* This MUST be kept binary-identical to struct soc_camera_link below, until
* it is completely replaced by this one, after which we can split it into its
* two components.
*/
struct soc_camera_desc {
struct soc_camera_subdev_desc subdev_desc;
struct soc_camera_host_desc host_desc;
};
/* Prepare to replace this struct: don't change its layout any more! */
struct soc_camera_link {
/*
* Subdevice part - keep at top and compatible to
* struct soc_camera_subdev_desc
*/
/* Per camera SOCAM_SENSOR_* bus flags */
unsigned long flags;
void *priv;
/* Set by platforms to handle misbehaving drivers */
bool unbalanced_power;
/* Used by soc-camera helper functions */
unsigned long clock_state;
/* 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 *);
/* Optional regulators that have to be managed on power on/off events */
struct regulator_bulk_data *regulators;
int num_regulators;
void *host_priv;
/*
* Host part - keep at bottom and compatible to
* struct soc_camera_host_desc
*/
/* Camera bus id, used to match a camera and a bus */
int bus_id;
int i2c_adapter_id;
struct i2c_board_info *board_info;
const char *module_name;
/*
* For non-I2C devices platform has to provide methods to add a device
* to the system and to remove it
*/
int (*add_device)(struct soc_camera_device *);
void (*del_device)(struct soc_camera_device *);
};
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_desc *to_soc_camera_desc(
const struct soc_camera_device *icd)
{
return icd->sdesc;
}
static inline struct device *to_soc_camera_control(
const struct soc_camera_device *icd)
{
return icd->control;
}
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
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