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/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Driver for Renesas RZ/G2L CRU
*
* Copyright (C) 2022 Renesas Electronics Corp.
*/
#ifndef __RZG2L_CRU__
#define __RZG2L_CRU__
#include <linux/reset.h>
#include <media/v4l2-async.h>
#include <media/v4l2-dev.h>
#include <media/v4l2-device.h>
#include <media/videobuf2-v4l2.h>
/* Number of HW buffers */
#define RZG2L_CRU_HW_BUFFER_MAX 8
#define RZG2L_CRU_HW_BUFFER_DEFAULT 3
/* Address alignment mask for HW buffers */
#define RZG2L_CRU_HW_BUFFER_MASK 0x1ff
/* Maximum number of CSI2 virtual channels */
#define RZG2L_CRU_CSI2_VCHANNEL 4
#define RZG2L_CRU_MIN_INPUT_WIDTH 320
#define RZG2L_CRU_MAX_INPUT_WIDTH 2800
#define RZG2L_CRU_MIN_INPUT_HEIGHT 240
#define RZG2L_CRU_MAX_INPUT_HEIGHT 4095
/**
* enum rzg2l_cru_dma_state - DMA states
* @RZG2L_CRU_DMA_STOPPED: No operation in progress
* @RZG2L_CRU_DMA_STARTING: Capture starting up
* @RZG2L_CRU_DMA_RUNNING: Operation in progress have buffers
* @RZG2L_CRU_DMA_STOPPING: Stopping operation
*/
enum rzg2l_cru_dma_state {
RZG2L_CRU_DMA_STOPPED = 0,
RZG2L_CRU_DMA_STARTING,
RZG2L_CRU_DMA_RUNNING,
RZG2L_CRU_DMA_STOPPING,
};
struct rzg2l_cru_csi {
struct v4l2_async_subdev *asd;
struct v4l2_subdev *subdev;
u32 channel;
};
struct rzg2l_cru_ip {
struct v4l2_subdev subdev;
struct media_pad pads[2];
struct v4l2_async_notifier notifier;
struct v4l2_subdev *remote;
};
/**
* struct rzg2l_cru_dev - Renesas CRU device structure
* @dev: (OF) device
* @base: device I/O register space remapped to virtual memory
* @info: info about CRU instance
*
* @presetn: CRU_PRESETN reset line
* @aresetn: CRU_ARESETN reset line
*
* @vclk: CRU Main clock
*
* @image_conv_irq: Holds image conversion interrupt number
*
* @vdev: V4L2 video device associated with CRU
* @v4l2_dev: V4L2 device
* @num_buf: Holds the current number of buffers enabled
* @notifier: V4L2 asynchronous subdevs notifier
*
* @ip: Image processing subdev info
* @csi: CSI info
* @mdev: media device
* @mdev_lock: protects the count, notifier and csi members
* @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
*
* @format: active V4L2 pixel format
*/
struct rzg2l_cru_dev {
struct device *dev;
void __iomem *base;
const struct rzg2l_cru_info *info;
struct reset_control *presetn;
struct reset_control *aresetn;
struct clk *vclk;
int image_conv_irq;
struct video_device vdev;
struct v4l2_device v4l2_dev;
u8 num_buf;
struct v4l2_async_notifier notifier;
struct rzg2l_cru_ip ip;
struct rzg2l_cru_csi csi;
struct media_device mdev;
struct mutex mdev_lock;
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[RZG2L_CRU_HW_BUFFER_MAX];
struct list_head buf_list;
unsigned int sequence;
enum rzg2l_cru_dma_state state;
struct v4l2_pix_format format;
};
void rzg2l_cru_vclk_unprepare(struct rzg2l_cru_dev *cru);
int rzg2l_cru_vclk_prepare(struct rzg2l_cru_dev *cru);
int rzg2l_cru_start_image_processing(struct rzg2l_cru_dev *cru);
void rzg2l_cru_stop_image_processing(struct rzg2l_cru_dev *cru);
int rzg2l_cru_dma_register(struct rzg2l_cru_dev *cru);
void rzg2l_cru_dma_unregister(struct rzg2l_cru_dev *cru);
int rzg2l_cru_video_register(struct rzg2l_cru_dev *cru);
void rzg2l_cru_video_unregister(struct rzg2l_cru_dev *cru);
const struct v4l2_format_info *rzg2l_cru_format_from_pixel(u32 format);
int rzg2l_cru_ip_subdev_register(struct rzg2l_cru_dev *cru);
void rzg2l_cru_ip_subdev_unregister(struct rzg2l_cru_dev *cru);
struct v4l2_mbus_framefmt *rzg2l_cru_ip_get_src_fmt(struct rzg2l_cru_dev *cru);
#endif
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