1 files changed, 315 insertions, 0 deletions
diff --git a/drivers/media/platform/renesas/rcar-vin/rcar-vin.h b/drivers/media/platform/renesas/rcar-vin/rcar-vin.h
new file mode 100644
index 000000000..1f94589d9
--- /dev/null
+++ b/drivers/media/platform/renesas/rcar-vin/rcar-vin.h
@@ -0,0 +1,315 @@
+/* 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/v4l2-fwnode.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 32
+
+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,
+};
+
+enum rvin_isp_id {
+	RVIN_ISP0,
+	RVIN_ISP1,
+	RVIN_ISP2,
+	RVIN_ISP4,
+	RVIN_ISP_MAX,
+};
+
+#define RVIN_REMOTES_MAX \
+	(((unsigned int)RVIN_CSI_MAX) > ((unsigned int)RVIN_ISP_MAX) ? \
+	 RVIN_CSI_MAX : RVIN_ISP_MAX)
+
+/**
+ * enum rvin_dma_state - DMA states
+ * @STOPPED:   No operation in progress
+ * @STARTING:  Capture starting up
+ * @RUNNING:   Operation in progress have buffers
+ * @STOPPING:  Stopping operation
+ * @SUSPENDED: Capture is suspended
+ */
+enum rvin_dma_state {
+	STOPPED = 0,
+	STARTING,
+	RUNNING,
+	STOPPING,
+	SUSPENDED,
+};
+
+/**
+ * enum rvin_buffer_type
+ *
+ * Describes how a buffer is given to the hardware. To be able
+ * to capture SEQ_TB/BT it's needed to capture to the same vb2
+ * buffer twice so the type of buffer needs to be kept.
+ *
+ * @FULL: One capture fills the whole vb2 buffer
+ * @HALF_TOP: One capture fills the top half of the vb2 buffer
+ * @HALF_BOTTOM: One capture fills the bottom half of the vb2 buffer
+ */
+enum rvin_buffer_type {
+	FULL,
+	HALF_TOP,
+	HALF_BOTTOM,
+};
+
+/**
+ * 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
+ * @bus:	media bus parallel configuration
+ * @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;
+	struct v4l2_mbus_config_parallel bus;
+
+	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
+ *
+ * @master:	VIN group master ID.
+ * @csi:	CSI-2 receiver ID.
+ * @chsel:	CHSEL register values that connects VIN group to CSI-2.
+ *
+ * .. 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.
+ */
+struct rvin_group_route {
+	unsigned int master;
+	enum rvin_csi_id csi;
+	unsigned int chsel;
+};
+
+/**
+ * struct rvin_info - Information about the particular VIN implementation
+ * @model:		VIN model
+ * @use_mc:		use media controller instead of controlling subdevice
+ * @use_isp:		the VIN is connected to the ISP and not to the CSI-2
+ * @nv12:		support outputing NV12 pixel format
+ * @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;
+	bool use_isp;
+	bool nv12;
+
+	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 @buf_hw, @buf_list, @sequence and @state
+ * @buf_hw:		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
+ * @chsel:		Cached value of the current CSI-2 channel selection
+ *
+ * @mbus_code:		media bus format code
+ * @format:		active V4L2 pixel format
+ *
+ * @crop:		active cropping
+ * @compose:		active composing
+ * @src_rect:		active size of the video source
+ * @std:		active video standard of the video source
+ *
+ * @alpha:		Alpha component to fill in for supported pixel formats
+ */
+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 {
+		struct vb2_v4l2_buffer *buffer;
+		enum rvin_buffer_type type;
+		dma_addr_t phys;
+	} buf_hw[HW_BUFFER_NUM];
+	struct list_head buf_list;
+	unsigned int sequence;
+	enum rvin_dma_state state;
+
+	bool is_csi;
+	unsigned int chsel;
+
+	u32 mbus_code;
+	struct v4l2_pix_format format;
+
+	struct v4l2_rect crop;
+	struct v4l2_rect compose;
+	struct v4l2_rect src_rect;
+	v4l2_std_id std;
+
+	unsigned int alpha;
+};
+
+#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
+ * @link_setup:		Callback to create all links for the media graph
+ * @remotes:		array of pairs of fwnode and subdev pointers
+ *			to all remote 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];
+
+	int (*link_setup)(struct rvin_dev *vin);
+
+	struct {
+		struct v4l2_async_subdev *asd;
+		struct v4l2_subdev *subdev;
+	} remotes[RVIN_REMOTES_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(struct rvin_dev *vin,
+						       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);
+void rvin_set_alpha(struct rvin_dev *vin, unsigned int alpha);
+
+int rvin_start_streaming(struct rvin_dev *vin);
+void rvin_stop_streaming(struct rvin_dev *vin);
+
+#endif