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Diffstat (limited to 'include/media/v4l2-int-device.h')
| -rw-r--r-- | include/media/v4l2-int-device.h | 278 |
1 files changed, 278 insertions, 0 deletions
diff --git a/include/media/v4l2-int-device.h b/include/media/v4l2-int-device.h new file mode 100644 index 000000000000..066ebfc4f983 --- /dev/null +++ b/include/media/v4l2-int-device.h @@ -0,0 +1,278 @@ +/* + * 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 |