/*
* include/media/v4l2-int-device.h
*
* V4L2 internal ioctl interface.
*
* Copyright (C) 2007 Nokia Corporation.
*
* Contact: Sakari Ailus <sakari.ailus@nokia.com>
*
* 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.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#ifndef V4L2_INT_DEVICE_H
#define V4L2_INT_DEVICE_H
#include <linux/module.h>
#include <media/v4l2-common.h>
#define V4L2NAMESIZE 32
/*
*
* The internal V4L2 device interface core.
*
*/
enum v4l2_int_type {
v4l2_int_type_master = 1,
v4l2_int_type_slave
};
struct v4l2_int_device;
struct v4l2_int_master {
int (*attach)(struct v4l2_int_device *master,
struct v4l2_int_device *slave);
void (*detach)(struct v4l2_int_device *master);
};
typedef int (v4l2_int_ioctl_func)(struct v4l2_int_device *);
typedef int (v4l2_int_ioctl_func_0)(struct v4l2_int_device *);
typedef int (v4l2_int_ioctl_func_1)(struct v4l2_int_device *, void *);
struct v4l2_int_ioctl_desc {
int num;
v4l2_int_ioctl_func *func;
};
struct v4l2_int_slave {
/* Don't touch master. */
struct v4l2_int_device *master;
char attach_to[V4L2NAMESIZE];
int num_ioctls;
struct v4l2_int_ioctl_desc *ioctls;
};
struct v4l2_int_device {
/* Don't touch head. */
struct list_head head;
struct module *module;
char name[V4L2NAMESIZE];
enum v4l2_int_type type;
union {
struct v4l2_int_master *master;
struct v4l2_int_slave *slave;
} u;
void *priv;
};
int v4l2_int_device_register(struct v4l2_int_device *d);
void v4l2_int_device_unregister(struct v4l2_int_device *d);
int v4l2_int_ioctl_0(struct v4l2_int_device *d, int cmd);
int v4l2_int_ioctl_1(struct v4l2_int_device *d, int cmd, void *arg);
/*
*
* Types and definitions for IOCTL commands.
*
*/
/* Slave interface type. */
enum v4l2_if_type {
/*
* Parallel 8-, 10- or 12-bit interface, used by for example
* on certain image sensors.
*/
V4L2_IF_TYPE_BT656,
};
enum v4l2_if_type_bt656_mode {
/*
* Modes without Bt synchronisation codes. Separate
* synchronisation signal lines are used.
*/
V4L2_IF_TYPE_BT656_MODE_NOBT_8BIT,
V4L2_IF_TYPE_BT656_MODE_NOBT_10BIT,
V4L2_IF_TYPE_BT656_MODE_NOBT_12BIT,
/*
* Use Bt synchronisation codes. The vertical and horizontal
* synchronisation is done based on synchronisation codes.
*/
V4L2_IF_TYPE_BT656_MODE_BT_8BIT,
V4L2_IF_TYPE_BT656_MODE_BT_10BIT,
};
struct v4l2_if_type_bt656 {
/*
* 0: Frame begins when vsync is high.
* 1: Frame begins when vsync changes from low to high.
*/
unsigned frame_start_on_rising_vs:1;
/* Use Bt synchronisation codes for sync correction. */
unsigned bt_sync_correct:1;
/* Swap every two adjacent image data elements. */
unsigned swap:1;
/* Inverted latch clock polarity from slave. */
unsigned latch_clk_inv:1;
/* Hs polarity. 0 is active high, 1 active low. */
unsigned nobt_hs_inv:1;
/* Vs polarity. 0 is active high, 1 active low. */
unsigned nobt_vs_inv:1;
enum v4l2_if_type_bt656_mode mode;
/* Minimum accepted bus clock for slave (in Hz). */
u32 clock_min;
/* Maximum accepted bus clock for slave. */
u32 clock_max;
/*
* Current wish of the slave. May only change in response to
* ioctls that affect image capture.
*/
u32 clock_curr;
};
struct v4l2_ifparm {
enum v4l2_if_type if_type;
union {
struct v4l2_if_type_bt656 bt656;
} u;
};
/* IOCTL command numbers. */
enum v4l2_int_ioctl_num {
/*
*
* "Proper" V4L ioctls, as in struct video_device.
*
*/
vidioc_int_enum_fmt_cap_num = 1,
vidioc_int_g_fmt_cap_num,
vidioc_int_s_fmt_cap_num,
vidioc_int_try_fmt_cap_num,
vidioc_int_queryctrl_num,
vidioc_int_g_ctrl_num,
vidioc_int_s_ctrl_num,
vidioc_int_g_parm_num,
vidioc_int_s_parm_num,
/*
*
* Strictly internal ioctls.
*
*/
/* Initialise the device when slave attaches to the master. */
vidioc_int_dev_init_num = 1000,
/* Delinitialise the device at slave detach. */
vidioc_int_dev_exit_num,
/* Set device power state: 0 is off, non-zero is on. */
vidioc_int_s_power_num,
/* Get slave interface parameters. */
vidioc_int_g_ifparm_num,
/* Does the slave need to be reset after VIDIOC_DQBUF? */
vidioc_int_g_needs_reset_num,
/*
*
* VIDIOC_INT_* ioctls.
*
*/
/* VIDIOC_INT_RESET */
vidioc_int_reset_num,
/* VIDIOC_INT_INIT */
vidioc_int_init_num,
/* VIDIOC_INT_G_CHIP_IDENT */
vidioc_int_g_chip_ident_num,
/*
*
* Start of private ioctls.
*
*/
vidioc_int_priv_start_num = 2000,
};
/*
*
* IOCTL wrapper functions for better type checking.
*
*/
#define V4L2_INT_WRAPPER_0(name) \
static inline int vidioc_int_##name(struct v4l2_int_device *d) \
{ \
return v4l2_int_ioctl_0(d, vidioc_int_##name##_num); \
} \
\
static inline struct v4l2_int_ioctl_desc \
vidioc_int_##name##_cb(int (*func) \
(struct v4l2_int_device *)) \
{ \
struct v4l2_int_ioctl_desc desc; \
\
desc.num = vidioc_int_##name##_num; \
desc.func = (v4l2_int_ioctl_func *)func; \
\
return desc; \
}
#define V4L2_INT_WRAPPER_1(name, arg_type, asterisk) \
static inline int vidioc_int_##name(struct v4l2_int_device *d, \
arg_type asterisk arg) \
{ \
return v4l2_int_ioctl_1(d, vidioc_int_##name##_num, \
(void *)(unsigned long)arg); \
} \
\
static inline struct v4l2_int_ioctl_desc \
vidioc_int_##name##_cb(int (*func) \
(struct v4l2_int_device *, \
arg_type asterisk)) \
{ \
struct v4l2_int_ioctl_desc desc; \
\
desc.num = vidioc_int_##name##_num; \
desc.func = (v4l2_int_ioctl_func *)func; \
\
return desc; \
}
V4L2_INT_WRAPPER_1(enum_fmt_cap, struct v4l2_fmtdesc, *);
V4L2_INT_WRAPPER_1(g_fmt_cap, struct v4l2_format, *);
V4L2_INT_WRAPPER_1(s_fmt_cap, struct v4l2_format, *);
V4L2_INT_WRAPPER_1(try_fmt_cap, struct v4l2_format, *);
V4L2_INT_WRAPPER_1(queryctrl, struct v4l2_queryctrl, *);
V4L2_INT_WRAPPER_1(g_ctrl, struct v4l2_control, *);
V4L2_INT_WRAPPER_1(s_ctrl, struct v4l2_control, *);
V4L2_INT_WRAPPER_1(g_parm, struct v4l2_streamparm, *);
V4L2_INT_WRAPPER_1(s_parm, struct v4l2_streamparm, *);
V4L2_INT_WRAPPER_0(dev_init);
V4L2_INT_WRAPPER_0(dev_exit);
V4L2_INT_WRAPPER_1(s_power, int, );
V4L2_INT_WRAPPER_1(g_ifparm, struct v4l2_ifparm, *);
V4L2_INT_WRAPPER_1(g_needs_reset, void, *);
V4L2_INT_WRAPPER_0(reset);
V4L2_INT_WRAPPER_0(init);
V4L2_INT_WRAPPER_1(g_chip_ident, int, *);
#endif
