linux/drivers/staging/media/atomisp/pci/atomisp_csi2.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Support for Medifield PNW Camera Imaging ISP subsystem.
 *
 * Copyright (c) 2010 Intel Corporation. All Rights Reserved.
 *
 * 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.
 *
 *
 */

#include <media/v4l2-event.h>
#include <media/v4l2-mediabus.h>
#include "atomisp_cmd.h"
#include "atomisp_internal.h"
#include "atomisp-regs.h"

static struct
v4l2_mbus_framefmt *__csi2_get_format(struct atomisp_mipi_csi2_device *csi2,
				      struct v4l2_subdev_state *sd_state,
				      enum v4l2_subdev_format_whence which,
				      unsigned int pad)
{ … }

/*
 * csi2_enum_mbus_code - Handle pixel format enumeration
 * @sd     : pointer to v4l2 subdev structure
 * @fh     : V4L2 subdev file handle
 * @code   : pointer to v4l2_subdev_pad_mbus_code_enum structure
 * return -EINVAL or zero on success
 */
static int csi2_enum_mbus_code(struct v4l2_subdev *sd,
			       struct v4l2_subdev_state *sd_state,
			       struct v4l2_subdev_mbus_code_enum *code)
{ … }

/*
 * csi2_get_format - Handle get format by pads subdev method
 * @sd : pointer to v4l2 subdev structure
 * @fh : V4L2 subdev file handle
 * @pad: pad num
 * @fmt: pointer to v4l2 format structure
 * return -EINVAL or zero on success
 */
static int csi2_get_format(struct v4l2_subdev *sd,
			   struct v4l2_subdev_state *sd_state,
			   struct v4l2_subdev_format *fmt)
{ … }

int atomisp_csi2_set_ffmt(struct v4l2_subdev *sd,
			  struct v4l2_subdev_state *sd_state,
			  unsigned int which, uint16_t pad,
			  struct v4l2_mbus_framefmt *ffmt)
{ … }

/*
 * csi2_set_format - Handle set format by pads subdev method
 * @sd : pointer to v4l2 subdev structure
 * @fh : V4L2 subdev file handle
 * @pad: pad num
 * @fmt: pointer to v4l2 format structure
 * return -EINVAL or zero on success
 */
static int csi2_set_format(struct v4l2_subdev *sd,
			   struct v4l2_subdev_state *sd_state,
			   struct v4l2_subdev_format *fmt)
{ … }

/* subdev pad operations */
static const struct v4l2_subdev_pad_ops csi2_pad_ops = …;

/* subdev operations */
static const struct v4l2_subdev_ops csi2_ops = …;

/* media operations */
static const struct media_entity_operations csi2_media_ops = …;

/*
 * ispcsi2_init_entities - Initialize subdev and media entity.
 * @csi2: Pointer to ispcsi2 structure.
 * return -ENOMEM or zero on success
 */
static int mipi_csi2_init_entities(struct atomisp_mipi_csi2_device *csi2,
				   int port)
{ … }

void
atomisp_mipi_csi2_unregister_entities(struct atomisp_mipi_csi2_device *csi2)
{ … }

int atomisp_mipi_csi2_register_entities(struct atomisp_mipi_csi2_device *csi2,
					struct v4l2_device *vdev)
{ … }

static const int LIMIT_SHIFT = …;	/* Limit numeric range into 31 bits */

static int
atomisp_csi2_configure_calc(const short int coeffs[2], int mipi_freq, int def)
{ … }

static void atomisp_csi2_configure_isp2401(struct atomisp_sub_device *asd)
{ … }

void atomisp_csi2_configure(struct atomisp_sub_device *asd)
{ … }

/*
 * atomisp_mipi_csi2_cleanup - Routine for module driver cleanup
 */
void atomisp_mipi_csi2_cleanup(struct atomisp_device *isp)
{ … }

int atomisp_mipi_csi2_init(struct atomisp_device *isp)
{ … }