mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-26 02:39:48 +00:00
![Guennadi Liakhovetski](/assets/img/avatar_default.png)
In scan_async_group() if the size parameter is negative, the sasd pointer will be used uninitialised: drivers/media/platform/soc_camera/soc_camera.c: In function "soc_camera_host_register": drivers/media/platform/soc_camera/soc_camera.c:1514:55: warning: "sasd" may be used uninitialized in this function [-Wmaybe-uninitialized] sasd->asd.match.i2c.adapter_id, sasd->asd.match.i2c.address); ^ drivers/media/platform/soc_camera/soc_camera.c:1464:34: note: "sasd" was declared here struct soc_camera_async_subdev *sasd; Fix this by making "size" and the array, from which it is assigned unsigned. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Acked-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
400 lines
13 KiB
C
400 lines
13 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/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-core.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 (*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 *, const struct v4l2_crop *);
|
|
int (*get_selection)(struct soc_camera_device *, struct v4l2_selection *);
|
|
int (*set_selection)(struct soc_camera_device *, struct v4l2_selection *);
|
|
/*
|
|
* The difference to .set_crop() is, that .set_livecrop is not allowed
|
|
* to change the output sizes
|
|
*/
|
|
int (*set_livecrop)(struct soc_camera_device *, const 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 (*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;
|
|
|
|
/* Optional regulators that have to be managed on power on/off events */
|
|
struct regulator_bulk_data *regulators;
|
|
int num_regulators;
|
|
|
|
/* 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 *);
|
|
};
|
|
|
|
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;
|
|
|
|
/* Optional regulators that have to be managed on power on/off events */
|
|
struct regulator_bulk_data *regulators;
|
|
int num_regulators;
|
|
|
|
/* 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 *);
|
|
|
|
/*
|
|
* 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 *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;
|
|
};
|
|
|
|
#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;
|
|
};
|
|
|
|
#define SOCAM_DATAWIDTH(x) BIT((x) - 1)
|
|
#define SOCAM_DATAWIDTH_4 SOCAM_DATAWIDTH(4)
|
|
#define SOCAM_DATAWIDTH_8 SOCAM_DATAWIDTH(8)
|
|
#define SOCAM_DATAWIDTH_9 SOCAM_DATAWIDTH(9)
|
|
#define SOCAM_DATAWIDTH_10 SOCAM_DATAWIDTH(10)
|
|
#define SOCAM_DATAWIDTH_12 SOCAM_DATAWIDTH(12)
|
|
#define SOCAM_DATAWIDTH_15 SOCAM_DATAWIDTH(15)
|
|
#define SOCAM_DATAWIDTH_16 SOCAM_DATAWIDTH(16)
|
|
#define SOCAM_DATAWIDTH_18 SOCAM_DATAWIDTH(18)
|
|
#define SOCAM_DATAWIDTH_24 SOCAM_DATAWIDTH(24)
|
|
|
|
#define SOCAM_DATAWIDTH_MASK (SOCAM_DATAWIDTH_4 | SOCAM_DATAWIDTH_8 | \
|
|
SOCAM_DATAWIDTH_9 | SOCAM_DATAWIDTH_10 | \
|
|
SOCAM_DATAWIDTH_12 | SOCAM_DATAWIDTH_15 | \
|
|
SOCAM_DATAWIDTH_16 | SOCAM_DATAWIDTH_18 | \
|
|
SOCAM_DATAWIDTH_24)
|
|
|
|
static inline void soc_camera_limit_side(int *start, 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;
|
|
}
|
|
|
|
unsigned long soc_camera_apply_board_flags(struct soc_camera_subdev_desc *ssdd,
|
|
const struct v4l2_mbus_config *cfg);
|
|
|
|
int soc_camera_power_init(struct device *dev, struct soc_camera_subdev_desc *ssdd);
|
|
int soc_camera_power_on(struct device *dev, struct soc_camera_subdev_desc *ssdd,
|
|
struct v4l2_clk *clk);
|
|
int soc_camera_power_off(struct device *dev, struct soc_camera_subdev_desc *ssdd,
|
|
struct v4l2_clk *clk);
|
|
|
|
static inline int soc_camera_set_power(struct device *dev,
|
|
struct soc_camera_subdev_desc *ssdd, struct v4l2_clk *clk, bool on)
|
|
{
|
|
return on ? soc_camera_power_on(dev, ssdd, clk)
|
|
: soc_camera_power_off(dev, ssdd, clk);
|
|
}
|
|
|
|
/* This is only temporary here - until v4l2-subdev begins to link to video_device */
|
|
#include <linux/i2c.h>
|
|
static inline struct video_device *soc_camera_i2c_to_vdev(const struct i2c_client *client)
|
|
{
|
|
struct v4l2_subdev *sd = i2c_get_clientdata(client);
|
|
struct soc_camera_device *icd = v4l2_get_subdev_hostdata(sd);
|
|
return icd ? icd->vdev : NULL;
|
|
}
|
|
|
|
static inline struct soc_camera_subdev_desc *soc_camera_i2c_to_desc(const struct i2c_client *client)
|
|
{
|
|
return client->dev.platform_data;
|
|
}
|
|
|
|
static inline struct v4l2_subdev *soc_camera_vdev_to_subdev(struct video_device *vdev)
|
|
{
|
|
struct soc_camera_device *icd = video_get_drvdata(vdev);
|
|
return soc_camera_to_subdev(icd);
|
|
}
|
|
|
|
static inline struct soc_camera_device *soc_camera_from_vb2q(const struct vb2_queue *vq)
|
|
{
|
|
return container_of(vq, struct soc_camera_device, vb2_vidq);
|
|
}
|
|
|
|
static inline struct soc_camera_device *soc_camera_from_vbq(const struct videobuf_queue *vq)
|
|
{
|
|
return container_of(vq, struct soc_camera_device, vb_vidq);
|
|
}
|
|
|
|
static inline u32 soc_camera_grp_id(const struct soc_camera_device *icd)
|
|
{
|
|
return (icd->iface << 8) | (icd->devnum + 1);
|
|
}
|
|
|
|
void soc_camera_lock(struct vb2_queue *vq);
|
|
void soc_camera_unlock(struct vb2_queue *vq);
|
|
|
|
#endif
|