271 lines
6.9 KiB
C
271 lines
6.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
|
|
/*
|
|
* Driver for Renesas R-Car VIN
|
|
*
|
|
* Copyright (C) 2016 Renesas Electronics Corp.
|
|
* Copyright (C) 2011-2013 Renesas Solutions Corp.
|
|
* Copyright (C) 2013 Cogent Embedded, Inc., <source@cogentembedded.com>
|
|
* Copyright (C) 2008 Magnus Damm
|
|
*
|
|
* Based on the soc-camera rcar_vin driver
|
|
*/
|
|
|
|
#ifndef __RCAR_VIN__
|
|
#define __RCAR_VIN__
|
|
|
|
#include <linux/kref.h>
|
|
|
|
#include <media/v4l2-async.h>
|
|
#include <media/v4l2-ctrls.h>
|
|
#include <media/v4l2-dev.h>
|
|
#include <media/v4l2-device.h>
|
|
#include <media/videobuf2-v4l2.h>
|
|
|
|
/* Number of HW buffers */
|
|
#define HW_BUFFER_NUM 3
|
|
|
|
/* Address alignment mask for HW buffers */
|
|
#define HW_BUFFER_MASK 0x7f
|
|
|
|
/* Max number on VIN instances that can be in a system */
|
|
#define RCAR_VIN_NUM 8
|
|
|
|
struct rvin_group;
|
|
|
|
enum model_id {
|
|
RCAR_H1,
|
|
RCAR_M1,
|
|
RCAR_GEN2,
|
|
RCAR_GEN3,
|
|
};
|
|
|
|
enum rvin_csi_id {
|
|
RVIN_CSI20,
|
|
RVIN_CSI21,
|
|
RVIN_CSI40,
|
|
RVIN_CSI41,
|
|
RVIN_CSI_MAX,
|
|
};
|
|
|
|
/**
|
|
* STOPPED - No operation in progress
|
|
* STARTING - Capture starting up
|
|
* RUNNING - Operation in progress have buffers
|
|
* STOPPING - Stopping operation
|
|
*/
|
|
enum rvin_dma_state {
|
|
STOPPED = 0,
|
|
STARTING,
|
|
RUNNING,
|
|
STOPPING,
|
|
};
|
|
|
|
/**
|
|
* struct rvin_video_format - Data format stored in memory
|
|
* @fourcc: Pixelformat
|
|
* @bpp: Bytes per pixel
|
|
*/
|
|
struct rvin_video_format {
|
|
u32 fourcc;
|
|
u8 bpp;
|
|
};
|
|
|
|
/**
|
|
* struct rvin_parallel_entity - Parallel video input endpoint descriptor
|
|
* @asd: sub-device descriptor for async framework
|
|
* @subdev: subdevice matched using async framework
|
|
* @mbus_type: media bus type
|
|
* @mbus_flags: media bus configuration flags
|
|
* @source_pad: source pad of remote subdevice
|
|
* @sink_pad: sink pad of remote subdevice
|
|
*
|
|
*/
|
|
struct rvin_parallel_entity {
|
|
struct v4l2_async_subdev asd;
|
|
struct v4l2_subdev *subdev;
|
|
|
|
enum v4l2_mbus_type mbus_type;
|
|
unsigned int mbus_flags;
|
|
|
|
unsigned int source_pad;
|
|
unsigned int sink_pad;
|
|
};
|
|
|
|
/**
|
|
* struct rvin_group_route - describes a route from a channel of a
|
|
* CSI-2 receiver to a VIN
|
|
*
|
|
* @csi: CSI-2 receiver ID.
|
|
* @channel: Output channel of the CSI-2 receiver.
|
|
* @vin: VIN ID.
|
|
* @mask: Bitmask of the different CHSEL register values that
|
|
* allow for a route from @csi + @chan to @vin.
|
|
*
|
|
* .. note::
|
|
* Each R-Car CSI-2 receiver has four output channels facing the VIN
|
|
* devices, each channel can carry one CSI-2 Virtual Channel (VC).
|
|
* There is no correlation between channel number and CSI-2 VC. It's
|
|
* up to the CSI-2 receiver driver to configure which VC is output
|
|
* on which channel, the VIN devices only care about output channels.
|
|
*
|
|
* There are in some cases multiple CHSEL register settings which would
|
|
* allow for the same route from @csi + @channel to @vin. For example
|
|
* on R-Car H3 both the CHSEL values 0 and 3 allow for a route from
|
|
* CSI40/VC0 to VIN0. All possible CHSEL values for a route need to be
|
|
* recorded as a bitmask in @mask, in this example bit 0 and 3 should
|
|
* be set.
|
|
*/
|
|
struct rvin_group_route {
|
|
enum rvin_csi_id csi;
|
|
unsigned int channel;
|
|
unsigned int vin;
|
|
unsigned int mask;
|
|
};
|
|
|
|
/**
|
|
* struct rvin_info - Information about the particular VIN implementation
|
|
* @model: VIN model
|
|
* @use_mc: use media controller instead of controlling subdevice
|
|
* @max_width: max input width the VIN supports
|
|
* @max_height: max input height the VIN supports
|
|
* @routes: list of possible routes from the CSI-2 recivers to
|
|
* all VINs. The list mush be NULL terminated.
|
|
*/
|
|
struct rvin_info {
|
|
enum model_id model;
|
|
bool use_mc;
|
|
|
|
unsigned int max_width;
|
|
unsigned int max_height;
|
|
const struct rvin_group_route *routes;
|
|
};
|
|
|
|
/**
|
|
* struct rvin_dev - Renesas VIN device structure
|
|
* @dev: (OF) device
|
|
* @base: device I/O register space remapped to virtual memory
|
|
* @info: info about VIN instance
|
|
*
|
|
* @vdev: V4L2 video device associated with VIN
|
|
* @v4l2_dev: V4L2 device
|
|
* @ctrl_handler: V4L2 control handler
|
|
* @notifier: V4L2 asynchronous subdevs notifier
|
|
*
|
|
* @parallel: parallel input subdevice descriptor
|
|
*
|
|
* @group: Gen3 CSI group
|
|
* @id: Gen3 group id for this VIN
|
|
* @pad: media pad for the video device entity
|
|
*
|
|
* @lock: protects @queue
|
|
* @queue: vb2 buffers queue
|
|
* @scratch: cpu address for scratch buffer
|
|
* @scratch_phys: physical address of the scratch buffer
|
|
*
|
|
* @qlock: protects @queue_buf, @buf_list, @sequence
|
|
* @state
|
|
* @queue_buf: Keeps track of buffers given to HW slot
|
|
* @buf_list: list of queued buffers
|
|
* @sequence: V4L2 buffers sequence number
|
|
* @state: keeps track of operation state
|
|
*
|
|
* @is_csi: flag to mark the VIN as using a CSI-2 subdevice
|
|
*
|
|
* @mbus_code: media bus format code
|
|
* @format: active V4L2 pixel format
|
|
*
|
|
* @crop: active cropping
|
|
* @compose: active composing
|
|
* @source: active size of the video source
|
|
* @std: active video standard of the video source
|
|
*/
|
|
struct rvin_dev {
|
|
struct device *dev;
|
|
void __iomem *base;
|
|
const struct rvin_info *info;
|
|
|
|
struct video_device vdev;
|
|
struct v4l2_device v4l2_dev;
|
|
struct v4l2_ctrl_handler ctrl_handler;
|
|
struct v4l2_async_notifier notifier;
|
|
|
|
struct rvin_parallel_entity *parallel;
|
|
|
|
struct rvin_group *group;
|
|
unsigned int id;
|
|
struct media_pad pad;
|
|
|
|
struct mutex lock;
|
|
struct vb2_queue queue;
|
|
void *scratch;
|
|
dma_addr_t scratch_phys;
|
|
|
|
spinlock_t qlock;
|
|
struct vb2_v4l2_buffer *queue_buf[HW_BUFFER_NUM];
|
|
struct list_head buf_list;
|
|
unsigned int sequence;
|
|
enum rvin_dma_state state;
|
|
|
|
bool is_csi;
|
|
|
|
u32 mbus_code;
|
|
struct v4l2_pix_format format;
|
|
|
|
struct v4l2_rect crop;
|
|
struct v4l2_rect compose;
|
|
struct v4l2_rect source;
|
|
v4l2_std_id std;
|
|
};
|
|
|
|
#define vin_to_source(vin) ((vin)->parallel->subdev)
|
|
|
|
/* Debug */
|
|
#define vin_dbg(d, fmt, arg...) dev_dbg(d->dev, fmt, ##arg)
|
|
#define vin_info(d, fmt, arg...) dev_info(d->dev, fmt, ##arg)
|
|
#define vin_warn(d, fmt, arg...) dev_warn(d->dev, fmt, ##arg)
|
|
#define vin_err(d, fmt, arg...) dev_err(d->dev, fmt, ##arg)
|
|
|
|
/**
|
|
* struct rvin_group - VIN CSI2 group information
|
|
* @refcount: number of VIN instances using the group
|
|
*
|
|
* @mdev: media device which represents the group
|
|
*
|
|
* @lock: protects the count, notifier, vin and csi members
|
|
* @count: number of enabled VIN instances found in DT
|
|
* @notifier: group notifier for CSI-2 async subdevices
|
|
* @vin: VIN instances which are part of the group
|
|
* @csi: array of pairs of fwnode and subdev pointers
|
|
* to all CSI-2 subdevices.
|
|
*/
|
|
struct rvin_group {
|
|
struct kref refcount;
|
|
|
|
struct media_device mdev;
|
|
|
|
struct mutex lock;
|
|
unsigned int count;
|
|
struct v4l2_async_notifier notifier;
|
|
struct rvin_dev *vin[RCAR_VIN_NUM];
|
|
|
|
struct {
|
|
struct fwnode_handle *fwnode;
|
|
struct v4l2_subdev *subdev;
|
|
} csi[RVIN_CSI_MAX];
|
|
};
|
|
|
|
int rvin_dma_register(struct rvin_dev *vin, int irq);
|
|
void rvin_dma_unregister(struct rvin_dev *vin);
|
|
|
|
int rvin_v4l2_register(struct rvin_dev *vin);
|
|
void rvin_v4l2_unregister(struct rvin_dev *vin);
|
|
|
|
const struct rvin_video_format *rvin_format_from_pixel(u32 pixelformat);
|
|
|
|
/* Cropping, composing and scaling */
|
|
void rvin_crop_scale_comp(struct rvin_dev *vin);
|
|
|
|
int rvin_set_channel_routing(struct rvin_dev *vin, u8 chsel);
|
|
|
|
#endif
|