mirror of https://gitee.com/openkylin/linux.git
613 lines
24 KiB
C++
613 lines
24 KiB
C++
/*
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V4L2 sub-device support header.
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Copyright (C) 2008 Hans Verkuil <hverkuil@xs4all.nl>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _V4L2_SUBDEV_H
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#define _V4L2_SUBDEV_H
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#include <linux/v4l2-subdev.h>
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#include <media/media-entity.h>
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#include <media/v4l2-common.h>
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#include <media/v4l2-dev.h>
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#include <media/v4l2-fh.h>
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#include <media/v4l2-mediabus.h>
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/* generic v4l2_device notify callback notification values */
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#define V4L2_SUBDEV_IR_RX_NOTIFY _IOW('v', 0, u32)
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#define V4L2_SUBDEV_IR_RX_FIFO_SERVICE_REQ 0x00000001
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#define V4L2_SUBDEV_IR_RX_END_OF_RX_DETECTED 0x00000002
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#define V4L2_SUBDEV_IR_RX_HW_FIFO_OVERRUN 0x00000004
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#define V4L2_SUBDEV_IR_RX_SW_FIFO_OVERRUN 0x00000008
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#define V4L2_SUBDEV_IR_TX_NOTIFY _IOW('v', 1, u32)
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#define V4L2_SUBDEV_IR_TX_FIFO_SERVICE_REQ 0x00000001
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struct v4l2_device;
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struct v4l2_ctrl_handler;
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struct v4l2_event_subscription;
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struct v4l2_fh;
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struct v4l2_subdev;
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struct v4l2_subdev_fh;
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struct tuner_setup;
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/* decode_vbi_line */
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struct v4l2_decode_vbi_line {
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u32 is_second_field; /* Set to 0 for the first (odd) field,
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set to 1 for the second (even) field. */
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u8 *p; /* Pointer to the sliced VBI data from the decoder.
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On exit points to the start of the payload. */
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u32 line; /* Line number of the sliced VBI data (1-23) */
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u32 type; /* VBI service type (V4L2_SLICED_*). 0 if no service found */
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};
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/* Sub-devices are devices that are connected somehow to the main bridge
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device. These devices are usually audio/video muxers/encoders/decoders or
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sensors and webcam controllers.
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Usually these devices are controlled through an i2c bus, but other busses
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may also be used.
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The v4l2_subdev struct provides a way of accessing these devices in a
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generic manner. Most operations that these sub-devices support fall in
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a few categories: core ops, audio ops, video ops and tuner ops.
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More categories can be added if needed, although this should remain a
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limited set (no more than approx. 8 categories).
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Each category has its own set of ops that subdev drivers can implement.
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A subdev driver can leave the pointer to the category ops NULL if
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it does not implement them (e.g. an audio subdev will generally not
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implement the video category ops). The exception is the core category:
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this must always be present.
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These ops are all used internally so it is no problem to change, remove
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or add ops or move ops from one to another category. Currently these
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ops are based on the original ioctls, but since ops are not limited to
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one argument there is room for improvement here once all i2c subdev
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drivers are converted to use these ops.
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*/
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/* Core ops: it is highly recommended to implement at least these ops:
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g_chip_ident
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log_status
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g_register
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s_register
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This provides basic debugging support.
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The ioctl ops is meant for generic ioctl-like commands. Depending on
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the use-case it might be better to use subdev-specific ops (currently
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not yet implemented) since ops provide proper type-checking.
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*/
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/* Subdevice external IO pin configuration */
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#define V4L2_SUBDEV_IO_PIN_DISABLE (1 << 0) /* ENABLE assumed */
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#define V4L2_SUBDEV_IO_PIN_OUTPUT (1 << 1)
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#define V4L2_SUBDEV_IO_PIN_INPUT (1 << 2)
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#define V4L2_SUBDEV_IO_PIN_SET_VALUE (1 << 3) /* Set output value */
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#define V4L2_SUBDEV_IO_PIN_ACTIVE_LOW (1 << 4) /* ACTIVE HIGH assumed */
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struct v4l2_subdev_io_pin_config {
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u32 flags; /* V4L2_SUBDEV_IO_PIN_* flags for this pin's config */
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u8 pin; /* Chip external IO pin to configure */
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u8 function; /* Internal signal pad/function to route to IO pin */
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u8 value; /* Initial value for pin - e.g. GPIO output value */
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u8 strength; /* Pin drive strength */
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};
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/*
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s_io_pin_config: configure one or more chip I/O pins for chips that
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multiplex different internal signal pads out to IO pins. This function
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takes a pointer to an array of 'n' pin configuration entries, one for
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each pin being configured. This function could be called at times
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other than just subdevice initialization.
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init: initialize the sensor registors to some sort of reasonable default
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values. Do not use for new drivers and should be removed in existing
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drivers.
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load_fw: load firmware.
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reset: generic reset command. The argument selects which subsystems to
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reset. Passing 0 will always reset the whole chip. Do not use for new
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drivers without discussing this first on the linux-media mailinglist.
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There should be no reason normally to reset a device.
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s_gpio: set GPIO pins. Very simple right now, might need to be extended with
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a direction argument if needed.
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s_power: puts subdevice in power saving mode (on == 0) or normal operation
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mode (on == 1).
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interrupt_service_routine: Called by the bridge chip's interrupt service
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handler, when an interrupt status has be raised due to this subdev,
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so that this subdev can handle the details. It may schedule work to be
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performed later. It must not sleep. *Called from an IRQ context*.
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*/
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struct v4l2_subdev_core_ops {
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int (*g_chip_ident)(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip);
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int (*log_status)(struct v4l2_subdev *sd);
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int (*s_io_pin_config)(struct v4l2_subdev *sd, size_t n,
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struct v4l2_subdev_io_pin_config *pincfg);
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int (*init)(struct v4l2_subdev *sd, u32 val);
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int (*load_fw)(struct v4l2_subdev *sd);
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int (*reset)(struct v4l2_subdev *sd, u32 val);
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int (*s_gpio)(struct v4l2_subdev *sd, u32 val);
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int (*queryctrl)(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc);
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int (*g_ctrl)(struct v4l2_subdev *sd, struct v4l2_control *ctrl);
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int (*s_ctrl)(struct v4l2_subdev *sd, struct v4l2_control *ctrl);
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int (*g_ext_ctrls)(struct v4l2_subdev *sd, struct v4l2_ext_controls *ctrls);
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int (*s_ext_ctrls)(struct v4l2_subdev *sd, struct v4l2_ext_controls *ctrls);
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int (*try_ext_ctrls)(struct v4l2_subdev *sd, struct v4l2_ext_controls *ctrls);
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int (*querymenu)(struct v4l2_subdev *sd, struct v4l2_querymenu *qm);
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int (*s_std)(struct v4l2_subdev *sd, v4l2_std_id norm);
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long (*ioctl)(struct v4l2_subdev *sd, unsigned int cmd, void *arg);
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#ifdef CONFIG_VIDEO_ADV_DEBUG
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int (*g_register)(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg);
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int (*s_register)(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg);
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#endif
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int (*s_power)(struct v4l2_subdev *sd, int on);
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int (*interrupt_service_routine)(struct v4l2_subdev *sd,
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u32 status, bool *handled);
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int (*subscribe_event)(struct v4l2_subdev *sd, struct v4l2_fh *fh,
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struct v4l2_event_subscription *sub);
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int (*unsubscribe_event)(struct v4l2_subdev *sd, struct v4l2_fh *fh,
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struct v4l2_event_subscription *sub);
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};
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/* s_radio: v4l device was opened in radio mode.
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g_frequency: freq->type must be filled in. Normally done by video_ioctl2
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or the bridge driver.
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g_tuner:
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s_tuner: vt->type must be filled in. Normally done by video_ioctl2 or the
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bridge driver.
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s_type_addr: sets tuner type and its I2C addr.
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s_config: sets tda9887 specific stuff, like port1, port2 and qss
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*/
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struct v4l2_subdev_tuner_ops {
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int (*s_radio)(struct v4l2_subdev *sd);
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int (*s_frequency)(struct v4l2_subdev *sd, struct v4l2_frequency *freq);
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int (*g_frequency)(struct v4l2_subdev *sd, struct v4l2_frequency *freq);
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int (*g_tuner)(struct v4l2_subdev *sd, struct v4l2_tuner *vt);
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int (*s_tuner)(struct v4l2_subdev *sd, struct v4l2_tuner *vt);
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int (*g_modulator)(struct v4l2_subdev *sd, struct v4l2_modulator *vm);
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int (*s_modulator)(struct v4l2_subdev *sd, struct v4l2_modulator *vm);
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int (*s_type_addr)(struct v4l2_subdev *sd, struct tuner_setup *type);
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int (*s_config)(struct v4l2_subdev *sd, const struct v4l2_priv_tun_config *config);
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};
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/* s_clock_freq: set the frequency (in Hz) of the audio clock output.
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Used to slave an audio processor to the video decoder, ensuring that
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audio and video remain synchronized. Usual values for the frequency
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are 48000, 44100 or 32000 Hz. If the frequency is not supported, then
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-EINVAL is returned.
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s_i2s_clock_freq: sets I2S speed in bps. This is used to provide a standard
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way to select I2S clock used by driving digital audio streams at some
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board designs. Usual values for the frequency are 1024000 and 2048000.
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If the frequency is not supported, then -EINVAL is returned.
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s_routing: used to define the input and/or output pins of an audio chip,
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and any additional configuration data.
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Never attempt to use user-level input IDs (e.g. Composite, S-Video,
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Tuner) at this level. An i2c device shouldn't know about whether an
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input pin is connected to a Composite connector, become on another
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board or platform it might be connected to something else entirely.
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The calling driver is responsible for mapping a user-level input to
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the right pins on the i2c device.
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*/
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struct v4l2_subdev_audio_ops {
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int (*s_clock_freq)(struct v4l2_subdev *sd, u32 freq);
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int (*s_i2s_clock_freq)(struct v4l2_subdev *sd, u32 freq);
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int (*s_routing)(struct v4l2_subdev *sd, u32 input, u32 output, u32 config);
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int (*s_stream)(struct v4l2_subdev *sd, int enable);
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};
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/*
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s_std_output: set v4l2_std_id for video OUTPUT devices. This is ignored by
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video input devices.
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g_std_output: get current standard for video OUTPUT devices. This is ignored
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by video input devices.
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g_tvnorms_output: get v4l2_std_id with all standards supported by video
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OUTPUT device. This is ignored by video input devices.
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s_crystal_freq: sets the frequency of the crystal used to generate the
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clocks in Hz. An extra flags field allows device specific configuration
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regarding clock frequency dividers, etc. If not used, then set flags
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to 0. If the frequency is not supported, then -EINVAL is returned.
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g_input_status: get input status. Same as the status field in the v4l2_input
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struct.
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s_routing: see s_routing in audio_ops, except this version is for video
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devices.
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s_dv_preset: set dv (Digital Video) preset in the sub device. Similar to
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s_std()
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g_dv_preset: get current dv (Digital Video) preset in the sub device.
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query_dv_preset: query dv preset in the sub device. This is similar to
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querystd()
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s_dv_timings(): Set custom dv timings in the sub device. This is used
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when sub device is capable of setting detailed timing information
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in the hardware to generate/detect the video signal.
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g_dv_timings(): Get custom dv timings in the sub device.
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enum_mbus_fmt: enumerate pixel formats, provided by a video data source
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g_mbus_fmt: get the current pixel format, provided by a video data source
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try_mbus_fmt: try to set a pixel format on a video data source
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s_mbus_fmt: set a pixel format on a video data source
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g_mbus_config: get supported mediabus configurations
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s_mbus_config: set a certain mediabus configuration. This operation is added
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for compatibility with soc-camera drivers and should not be used by new
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software.
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*/
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struct v4l2_subdev_video_ops {
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int (*s_routing)(struct v4l2_subdev *sd, u32 input, u32 output, u32 config);
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int (*s_crystal_freq)(struct v4l2_subdev *sd, u32 freq, u32 flags);
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int (*s_std_output)(struct v4l2_subdev *sd, v4l2_std_id std);
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int (*g_std_output)(struct v4l2_subdev *sd, v4l2_std_id *std);
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int (*querystd)(struct v4l2_subdev *sd, v4l2_std_id *std);
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int (*g_tvnorms_output)(struct v4l2_subdev *sd, v4l2_std_id *std);
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int (*g_input_status)(struct v4l2_subdev *sd, u32 *status);
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int (*s_stream)(struct v4l2_subdev *sd, int enable);
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int (*cropcap)(struct v4l2_subdev *sd, struct v4l2_cropcap *cc);
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int (*g_crop)(struct v4l2_subdev *sd, struct v4l2_crop *crop);
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int (*s_crop)(struct v4l2_subdev *sd, struct v4l2_crop *crop);
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int (*g_parm)(struct v4l2_subdev *sd, struct v4l2_streamparm *param);
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int (*s_parm)(struct v4l2_subdev *sd, struct v4l2_streamparm *param);
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int (*g_frame_interval)(struct v4l2_subdev *sd,
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struct v4l2_subdev_frame_interval *interval);
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int (*s_frame_interval)(struct v4l2_subdev *sd,
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struct v4l2_subdev_frame_interval *interval);
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int (*enum_framesizes)(struct v4l2_subdev *sd, struct v4l2_frmsizeenum *fsize);
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int (*enum_frameintervals)(struct v4l2_subdev *sd, struct v4l2_frmivalenum *fival);
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int (*enum_dv_presets) (struct v4l2_subdev *sd,
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struct v4l2_dv_enum_preset *preset);
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int (*s_dv_preset)(struct v4l2_subdev *sd,
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struct v4l2_dv_preset *preset);
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int (*g_dv_preset)(struct v4l2_subdev *sd,
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struct v4l2_dv_preset *preset);
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int (*query_dv_preset)(struct v4l2_subdev *sd,
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struct v4l2_dv_preset *preset);
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int (*s_dv_timings)(struct v4l2_subdev *sd,
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struct v4l2_dv_timings *timings);
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int (*g_dv_timings)(struct v4l2_subdev *sd,
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struct v4l2_dv_timings *timings);
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int (*enum_mbus_fmt)(struct v4l2_subdev *sd, unsigned int index,
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enum v4l2_mbus_pixelcode *code);
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int (*enum_mbus_fsizes)(struct v4l2_subdev *sd,
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struct v4l2_frmsizeenum *fsize);
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int (*g_mbus_fmt)(struct v4l2_subdev *sd,
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struct v4l2_mbus_framefmt *fmt);
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int (*try_mbus_fmt)(struct v4l2_subdev *sd,
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struct v4l2_mbus_framefmt *fmt);
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int (*s_mbus_fmt)(struct v4l2_subdev *sd,
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struct v4l2_mbus_framefmt *fmt);
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int (*g_mbus_config)(struct v4l2_subdev *sd,
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struct v4l2_mbus_config *cfg);
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int (*s_mbus_config)(struct v4l2_subdev *sd,
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const struct v4l2_mbus_config *cfg);
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};
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/*
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decode_vbi_line: video decoders that support sliced VBI need to implement
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this ioctl. Field p of the v4l2_sliced_vbi_line struct is set to the
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start of the VBI data that was generated by the decoder. The driver
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then parses the sliced VBI data and sets the other fields in the
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struct accordingly. The pointer p is updated to point to the start of
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the payload which can be copied verbatim into the data field of the
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v4l2_sliced_vbi_data struct. If no valid VBI data was found, then the
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type field is set to 0 on return.
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s_vbi_data: used to generate VBI signals on a video signal.
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v4l2_sliced_vbi_data is filled with the data packets that should be
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output. Note that if you set the line field to 0, then that VBI signal
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is disabled. If no valid VBI data was found, then the type field is
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set to 0 on return.
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g_vbi_data: used to obtain the sliced VBI packet from a readback register.
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Not all video decoders support this. If no data is available because
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the readback register contains invalid or erroneous data -EIO is
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returned. Note that you must fill in the 'id' member and the 'field'
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member (to determine whether CC data from the first or second field
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should be obtained).
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s_raw_fmt: setup the video encoder/decoder for raw VBI.
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g_sliced_fmt: retrieve the current sliced VBI settings.
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s_sliced_fmt: setup the sliced VBI settings.
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*/
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struct v4l2_subdev_vbi_ops {
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int (*decode_vbi_line)(struct v4l2_subdev *sd, struct v4l2_decode_vbi_line *vbi_line);
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int (*s_vbi_data)(struct v4l2_subdev *sd, const struct v4l2_sliced_vbi_data *vbi_data);
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int (*g_vbi_data)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_data *vbi_data);
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int (*g_sliced_vbi_cap)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_cap *cap);
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int (*s_raw_fmt)(struct v4l2_subdev *sd, struct v4l2_vbi_format *fmt);
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int (*g_sliced_fmt)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_format *fmt);
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int (*s_sliced_fmt)(struct v4l2_subdev *sd, struct v4l2_sliced_vbi_format *fmt);
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};
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/**
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* struct v4l2_subdev_sensor_ops - v4l2-subdev sensor operations
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* @g_skip_top_lines: number of lines at the top of the image to be skipped.
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* This is needed for some sensors, which always corrupt
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* several top lines of the output image, or which send their
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* metadata in them.
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* @g_skip_frames: number of frames to skip at stream start. This is needed for
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* buggy sensors that generate faulty frames when they are
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* turned on.
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*/
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struct v4l2_subdev_sensor_ops {
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int (*g_skip_top_lines)(struct v4l2_subdev *sd, u32 *lines);
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int (*g_skip_frames)(struct v4l2_subdev *sd, u32 *frames);
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};
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/*
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[rt]x_g_parameters: Get the current operating parameters and state of the
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the IR receiver or transmitter.
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[rt]x_s_parameters: Set the current operating parameters and state of the
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the IR receiver or transmitter. It is recommended to call
|
|
[rt]x_g_parameters first to fill out the current state, and only change
|
|
the fields that need to be changed. Upon return, the actual device
|
|
operating parameters and state will be returned. Note that hardware
|
|
limitations may prevent the actual settings from matching the requested
|
|
settings - e.g. an actual carrier setting of 35,904 Hz when 36,000 Hz
|
|
was requested. An exception is when the shutdown parameter is true.
|
|
The last used operational parameters will be returned, but the actual
|
|
state of the hardware be different to minimize power consumption and
|
|
processing when shutdown is true.
|
|
|
|
rx_read: Reads received codes or pulse width data.
|
|
The semantics are similar to a non-blocking read() call.
|
|
|
|
tx_write: Writes codes or pulse width data for transmission.
|
|
The semantics are similar to a non-blocking write() call.
|
|
*/
|
|
|
|
enum v4l2_subdev_ir_mode {
|
|
V4L2_SUBDEV_IR_MODE_PULSE_WIDTH, /* uses struct ir_raw_event records */
|
|
};
|
|
|
|
struct v4l2_subdev_ir_parameters {
|
|
/* Either Rx or Tx */
|
|
unsigned int bytes_per_data_element; /* of data in read or write call */
|
|
enum v4l2_subdev_ir_mode mode;
|
|
|
|
bool enable;
|
|
bool interrupt_enable;
|
|
bool shutdown; /* true: set hardware to low/no power, false: normal */
|
|
|
|
bool modulation; /* true: uses carrier, false: baseband */
|
|
u32 max_pulse_width; /* ns, valid only for baseband signal */
|
|
unsigned int carrier_freq; /* Hz, valid only for modulated signal*/
|
|
unsigned int duty_cycle; /* percent, valid only for modulated signal*/
|
|
bool invert_level; /* invert signal level */
|
|
|
|
/* Tx only */
|
|
bool invert_carrier_sense; /* Send 0/space as a carrier burst */
|
|
|
|
/* Rx only */
|
|
u32 noise_filter_min_width; /* ns, min time of a valid pulse */
|
|
unsigned int carrier_range_lower; /* Hz, valid only for modulated sig */
|
|
unsigned int carrier_range_upper; /* Hz, valid only for modulated sig */
|
|
u32 resolution; /* ns */
|
|
};
|
|
|
|
struct v4l2_subdev_ir_ops {
|
|
/* Receiver */
|
|
int (*rx_read)(struct v4l2_subdev *sd, u8 *buf, size_t count,
|
|
ssize_t *num);
|
|
|
|
int (*rx_g_parameters)(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_ir_parameters *params);
|
|
int (*rx_s_parameters)(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_ir_parameters *params);
|
|
|
|
/* Transmitter */
|
|
int (*tx_write)(struct v4l2_subdev *sd, u8 *buf, size_t count,
|
|
ssize_t *num);
|
|
|
|
int (*tx_g_parameters)(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_ir_parameters *params);
|
|
int (*tx_s_parameters)(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_ir_parameters *params);
|
|
};
|
|
|
|
struct v4l2_subdev_pad_ops {
|
|
int (*enum_mbus_code)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
|
|
struct v4l2_subdev_mbus_code_enum *code);
|
|
int (*enum_frame_size)(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_fh *fh,
|
|
struct v4l2_subdev_frame_size_enum *fse);
|
|
int (*enum_frame_interval)(struct v4l2_subdev *sd,
|
|
struct v4l2_subdev_fh *fh,
|
|
struct v4l2_subdev_frame_interval_enum *fie);
|
|
int (*get_fmt)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
|
|
struct v4l2_subdev_format *format);
|
|
int (*set_fmt)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
|
|
struct v4l2_subdev_format *format);
|
|
int (*set_crop)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
|
|
struct v4l2_subdev_crop *crop);
|
|
int (*get_crop)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh,
|
|
struct v4l2_subdev_crop *crop);
|
|
};
|
|
|
|
struct v4l2_subdev_ops {
|
|
const struct v4l2_subdev_core_ops *core;
|
|
const struct v4l2_subdev_tuner_ops *tuner;
|
|
const struct v4l2_subdev_audio_ops *audio;
|
|
const struct v4l2_subdev_video_ops *video;
|
|
const struct v4l2_subdev_vbi_ops *vbi;
|
|
const struct v4l2_subdev_ir_ops *ir;
|
|
const struct v4l2_subdev_sensor_ops *sensor;
|
|
const struct v4l2_subdev_pad_ops *pad;
|
|
};
|
|
|
|
/*
|
|
* Internal ops. Never call this from drivers, only the v4l2 framework can call
|
|
* these ops.
|
|
*
|
|
* registered: called when this subdev is registered. When called the v4l2_dev
|
|
* field is set to the correct v4l2_device.
|
|
*
|
|
* unregistered: called when this subdev is unregistered. When called the
|
|
* v4l2_dev field is still set to the correct v4l2_device.
|
|
*
|
|
* open: called when the subdev device node is opened by an application.
|
|
*
|
|
* close: called when the subdev device node is closed.
|
|
*/
|
|
struct v4l2_subdev_internal_ops {
|
|
int (*registered)(struct v4l2_subdev *sd);
|
|
void (*unregistered)(struct v4l2_subdev *sd);
|
|
int (*open)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh);
|
|
int (*close)(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh);
|
|
};
|
|
|
|
#define V4L2_SUBDEV_NAME_SIZE 32
|
|
|
|
/* Set this flag if this subdev is a i2c device. */
|
|
#define V4L2_SUBDEV_FL_IS_I2C (1U << 0)
|
|
/* Set this flag if this subdev is a spi device. */
|
|
#define V4L2_SUBDEV_FL_IS_SPI (1U << 1)
|
|
/* Set this flag if this subdev needs a device node. */
|
|
#define V4L2_SUBDEV_FL_HAS_DEVNODE (1U << 2)
|
|
/* Set this flag if this subdev generates events. */
|
|
#define V4L2_SUBDEV_FL_HAS_EVENTS (1U << 3)
|
|
|
|
/* Each instance of a subdev driver should create this struct, either
|
|
stand-alone or embedded in a larger struct.
|
|
*/
|
|
struct v4l2_subdev {
|
|
#if defined(CONFIG_MEDIA_CONTROLLER)
|
|
struct media_entity entity;
|
|
#endif
|
|
struct list_head list;
|
|
struct module *owner;
|
|
u32 flags;
|
|
struct v4l2_device *v4l2_dev;
|
|
const struct v4l2_subdev_ops *ops;
|
|
/* Never call these internal ops from within a driver! */
|
|
const struct v4l2_subdev_internal_ops *internal_ops;
|
|
/* The control handler of this subdev. May be NULL. */
|
|
struct v4l2_ctrl_handler *ctrl_handler;
|
|
/* name must be unique */
|
|
char name[V4L2_SUBDEV_NAME_SIZE];
|
|
/* can be used to group similar subdevs, value is driver-specific */
|
|
u32 grp_id;
|
|
/* pointer to private data */
|
|
void *dev_priv;
|
|
void *host_priv;
|
|
/* subdev device node */
|
|
struct video_device devnode;
|
|
};
|
|
|
|
#define media_entity_to_v4l2_subdev(ent) \
|
|
container_of(ent, struct v4l2_subdev, entity)
|
|
#define vdev_to_v4l2_subdev(vdev) \
|
|
container_of(vdev, struct v4l2_subdev, devnode)
|
|
|
|
/*
|
|
* Used for storing subdev information per file handle
|
|
*/
|
|
struct v4l2_subdev_fh {
|
|
struct v4l2_fh vfh;
|
|
#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
|
|
struct v4l2_mbus_framefmt *try_fmt;
|
|
struct v4l2_rect *try_crop;
|
|
#endif
|
|
};
|
|
|
|
#define to_v4l2_subdev_fh(fh) \
|
|
container_of(fh, struct v4l2_subdev_fh, vfh)
|
|
|
|
#if defined(CONFIG_VIDEO_V4L2_SUBDEV_API)
|
|
static inline struct v4l2_mbus_framefmt *
|
|
v4l2_subdev_get_try_format(struct v4l2_subdev_fh *fh, unsigned int pad)
|
|
{
|
|
return &fh->try_fmt[pad];
|
|
}
|
|
|
|
static inline struct v4l2_rect *
|
|
v4l2_subdev_get_try_crop(struct v4l2_subdev_fh *fh, unsigned int pad)
|
|
{
|
|
return &fh->try_crop[pad];
|
|
}
|
|
#endif
|
|
|
|
extern const struct v4l2_file_operations v4l2_subdev_fops;
|
|
|
|
static inline void v4l2_set_subdevdata(struct v4l2_subdev *sd, void *p)
|
|
{
|
|
sd->dev_priv = p;
|
|
}
|
|
|
|
static inline void *v4l2_get_subdevdata(const struct v4l2_subdev *sd)
|
|
{
|
|
return sd->dev_priv;
|
|
}
|
|
|
|
static inline void v4l2_set_subdev_hostdata(struct v4l2_subdev *sd, void *p)
|
|
{
|
|
sd->host_priv = p;
|
|
}
|
|
|
|
static inline void *v4l2_get_subdev_hostdata(const struct v4l2_subdev *sd)
|
|
{
|
|
return sd->host_priv;
|
|
}
|
|
|
|
void v4l2_subdev_init(struct v4l2_subdev *sd,
|
|
const struct v4l2_subdev_ops *ops);
|
|
|
|
/* Call an ops of a v4l2_subdev, doing the right checks against
|
|
NULL pointers.
|
|
|
|
Example: err = v4l2_subdev_call(sd, core, g_chip_ident, &chip);
|
|
*/
|
|
#define v4l2_subdev_call(sd, o, f, args...) \
|
|
(!(sd) ? -ENODEV : (((sd)->ops->o && (sd)->ops->o->f) ? \
|
|
(sd)->ops->o->f((sd) , ##args) : -ENOIOCTLCMD))
|
|
|
|
/* Send a notification to v4l2_device. */
|
|
#define v4l2_subdev_notify(sd, notification, arg) \
|
|
((!(sd) || !(sd)->v4l2_dev || !(sd)->v4l2_dev->notify) ? -ENODEV : \
|
|
(sd)->v4l2_dev->notify((sd), (notification), (arg)))
|
|
|
|
#endif
|