camss-csiphy.c | Explore in Territory

// SPDX-License-Identifier: GPL-2.0
/*
 * camss-csiphy.c
 *
 * Qualcomm MSM Camera Subsystem - CSIPHY Module
 *
 * Copyright (c) 2011-2015, The Linux Foundation. All rights reserved.
 * Copyright (C) 2016-2018 Linaro Ltd.
 */
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <media/media-entity.h>
#include <media/v4l2-device.h>
#include <media/v4l2-subdev.h>

#include "camss-csiphy.h"
#include "camss.h"

#define MSM_CSIPHY_NAME …

static const struct csiphy_format_info formats_8x16[] = …;

static const struct csiphy_format_info formats_8x96[] = …;

static const struct csiphy_format_info formats_sdm845[] = …;

const struct csiphy_formats csiphy_formats_8x16 = …;

const struct csiphy_formats csiphy_formats_8x96 = …;

const struct csiphy_formats csiphy_formats_sdm845 = …;

/*
 * csiphy_get_bpp - map media bus format to bits per pixel
 * @formats: supported media bus formats array
 * @nformats: size of @formats array
 * @code: media bus format code
 *
 * Return number of bits per pixel
 */
static u8 csiphy_get_bpp(const struct csiphy_format_info *formats,
			 unsigned int nformats, u32 code)
{ … }

/*
 * csiphy_set_clock_rates - Calculate and set clock rates on CSIPHY module
 * @csiphy: CSIPHY device
 */
static int csiphy_set_clock_rates(struct csiphy_device *csiphy)
{ … }

/*
 * csiphy_set_power - Power on/off CSIPHY module
 * @sd: CSIPHY V4L2 subdevice
 * @on: Requested power state
 *
 * Return 0 on success or a negative error code otherwise
 */
static int csiphy_set_power(struct v4l2_subdev *sd, int on)
{ … }

/*
 * csiphy_stream_on - Enable streaming on CSIPHY module
 * @csiphy: CSIPHY device
 *
 * Helper function to enable streaming on CSIPHY module.
 * Main configuration of CSIPHY module is also done here.
 *
 * Return 0 on success or a negative error code otherwise
 */
static int csiphy_stream_on(struct csiphy_device *csiphy)
{ … }

/*
 * csiphy_stream_off - Disable streaming on CSIPHY module
 * @csiphy: CSIPHY device
 *
 * Helper function to disable streaming on CSIPHY module
 */
static void csiphy_stream_off(struct csiphy_device *csiphy)
{ … }


/*
 * csiphy_set_stream - Enable/disable streaming on CSIPHY module
 * @sd: CSIPHY V4L2 subdevice
 * @enable: Requested streaming state
 *
 * Return 0 on success or a negative error code otherwise
 */
static int csiphy_set_stream(struct v4l2_subdev *sd, int enable)
{ … }

/*
 * __csiphy_get_format - Get pointer to format structure
 * @csiphy: CSIPHY device
 * @sd_state: V4L2 subdev state
 * @pad: pad from which format is requested
 * @which: TRY or ACTIVE format
 *
 * Return pointer to TRY or ACTIVE format structure
 */
static struct v4l2_mbus_framefmt *
__csiphy_get_format(struct csiphy_device *csiphy,
		    struct v4l2_subdev_state *sd_state,
		    unsigned int pad,
		    enum v4l2_subdev_format_whence which)
{ … }

/*
 * csiphy_try_format - Handle try format by pad subdev method
 * @csiphy: CSIPHY device
 * @sd_state: V4L2 subdev state
 * @pad: pad on which format is requested
 * @fmt: pointer to v4l2 format structure
 * @which: wanted subdev format
 */
static void csiphy_try_format(struct csiphy_device *csiphy,
			      struct v4l2_subdev_state *sd_state,
			      unsigned int pad,
			      struct v4l2_mbus_framefmt *fmt,
			      enum v4l2_subdev_format_whence which)
{ … }

/*
 * csiphy_enum_mbus_code - Handle pixel format enumeration
 * @sd: CSIPHY V4L2 subdevice
 * @sd_state: V4L2 subdev state
 * @code: pointer to v4l2_subdev_mbus_code_enum structure
 * return -EINVAL or zero on success
 */
static int csiphy_enum_mbus_code(struct v4l2_subdev *sd,
				 struct v4l2_subdev_state *sd_state,
				 struct v4l2_subdev_mbus_code_enum *code)
{ … }

/*
 * csiphy_enum_frame_size - Handle frame size enumeration
 * @sd: CSIPHY V4L2 subdevice
 * @sd_state: V4L2 subdev state
 * @fse: pointer to v4l2_subdev_frame_size_enum structure
 * return -EINVAL or zero on success
 */
static int csiphy_enum_frame_size(struct v4l2_subdev *sd,
				  struct v4l2_subdev_state *sd_state,
				  struct v4l2_subdev_frame_size_enum *fse)
{ … }

/*
 * csiphy_get_format - Handle get format by pads subdev method
 * @sd: CSIPHY V4L2 subdevice
 * @sd_state: V4L2 subdev state
 * @fmt: pointer to v4l2 subdev format structure
 *
 * Return -EINVAL or zero on success
 */
static int csiphy_get_format(struct v4l2_subdev *sd,
			     struct v4l2_subdev_state *sd_state,
			     struct v4l2_subdev_format *fmt)
{ … }

/*
 * csiphy_set_format - Handle set format by pads subdev method
 * @sd: CSIPHY V4L2 subdevice
 * @sd_state: V4L2 subdev state
 * @fmt: pointer to v4l2 subdev format structure
 *
 * Return -EINVAL or zero on success
 */
static int csiphy_set_format(struct v4l2_subdev *sd,
			     struct v4l2_subdev_state *sd_state,
			     struct v4l2_subdev_format *fmt)
{ … }

/*
 * csiphy_init_formats - Initialize formats on all pads
 * @sd: CSIPHY V4L2 subdevice
 * @fh: V4L2 subdev file handle
 *
 * Initialize all pad formats with default values.
 *
 * Return 0 on success or a negative error code otherwise
 */
static int csiphy_init_formats(struct v4l2_subdev *sd,
			       struct v4l2_subdev_fh *fh)
{ … }

static bool csiphy_match_clock_name(const char *clock_name, const char *format,
				    int index)
{ … }

/*
 * msm_csiphy_subdev_init - Initialize CSIPHY device structure and resources
 * @csiphy: CSIPHY device
 * @res: CSIPHY module resources table
 * @id: CSIPHY module id
 *
 * Return 0 on success or a negative error code otherwise
 */
int msm_csiphy_subdev_init(struct camss *camss,
			   struct csiphy_device *csiphy,
			   const struct camss_subdev_resources *res, u8 id)
{ … }

/*
 * csiphy_link_setup - Setup CSIPHY connections
 * @entity: Pointer to media entity structure
 * @local: Pointer to local pad
 * @remote: Pointer to remote pad
 * @flags: Link flags
 *
 * Rreturn 0 on success
 */
static int csiphy_link_setup(struct media_entity *entity,
			     const struct media_pad *local,
			     const struct media_pad *remote, u32 flags)
{ … }

static const struct v4l2_subdev_core_ops csiphy_core_ops = …;

static const struct v4l2_subdev_video_ops csiphy_video_ops = …;

static const struct v4l2_subdev_pad_ops csiphy_pad_ops = …;

static const struct v4l2_subdev_ops csiphy_v4l2_ops = …;

static const struct v4l2_subdev_internal_ops csiphy_v4l2_internal_ops = …;

static const struct media_entity_operations csiphy_media_ops = …;

/*
 * msm_csiphy_register_entity - Register subdev node for CSIPHY module
 * @csiphy: CSIPHY device
 * @v4l2_dev: V4L2 device
 *
 * Return 0 on success or a negative error code otherwise
 */
int msm_csiphy_register_entity(struct csiphy_device *csiphy,
			       struct v4l2_device *v4l2_dev)
{ … }

/*
 * msm_csiphy_unregister_entity - Unregister CSIPHY module subdev node
 * @csiphy: CSIPHY device
 */
void msm_csiphy_unregister_entity(struct csiphy_device *csiphy)
{ … }
linux/drivers/media/platform/qcom/camss/camss-csiphy.c
