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/* SPDX-License-Identifier: GPL-2.0 */
/*
* RP1 CSI-2 Driver
*
* Copyright (c) 2021-2024 Raspberry Pi Ltd.
* Copyright (c) 2023-2024 Ideas on Board Oy
*/
#ifndef _RP1_CSI2_
#define _RP1_CSI2_
#include <linux/debugfs.h>
#include <linux/io.h>
#include <linux/types.h>
#include <media/v4l2-device.h>
#include <media/v4l2-subdev.h>
#include "dphy.h"
#define CSI2_NUM_CHANNELS 4
#define CSI2_PAD_SINK 0
#define CSI2_PAD_FIRST_SOURCE 1
#define CSI2_PAD_NUM_SOURCES 4
#define CSI2_NUM_PADS 5
#define DISCARDS_TABLE_NUM_VCS 4
enum csi2_mode {
CSI2_MODE_NORMAL = 0,
CSI2_MODE_REMAP = 1,
CSI2_MODE_COMPRESSED = 2,
CSI2_MODE_FE_STREAMING = 3,
};
enum csi2_compression_mode {
CSI2_COMPRESSION_DELTA = 1,
CSI2_COMPRESSION_SIMPLE = 2,
CSI2_COMPRESSION_COMBINED = 3,
};
enum discards_table_index {
DISCARDS_TABLE_OVERFLOW = 0,
DISCARDS_TABLE_LENGTH_LIMIT,
DISCARDS_TABLE_UNMATCHED,
DISCARDS_TABLE_INACTIVE,
DISCARDS_TABLE_NUM_ENTRIES,
};
struct csi2_device {
/* Parent V4l2 device */
struct v4l2_device *v4l2_dev;
void __iomem *base;
struct dphy_data dphy;
enum v4l2_mbus_type bus_type;
unsigned int bus_flags;
unsigned int num_lines[CSI2_NUM_CHANNELS];
struct media_pad pad[CSI2_NUM_PADS];
struct v4l2_subdev sd;
/* lock for csi2 errors counters */
spinlock_t errors_lock;
u32 overflows;
u32 discards_table[DISCARDS_TABLE_NUM_VCS][DISCARDS_TABLE_NUM_ENTRIES];
u32 discards_dt_table[DISCARDS_TABLE_NUM_ENTRIES];
};
void csi2_isr(struct csi2_device *csi2, bool *sof, bool *eof);
void csi2_set_buffer(struct csi2_device *csi2, unsigned int channel,
dma_addr_t dmaaddr, unsigned int stride,
unsigned int size);
void csi2_set_compression(struct csi2_device *csi2, unsigned int channel,
enum csi2_compression_mode mode, unsigned int shift,
unsigned int offset);
void csi2_start_channel(struct csi2_device *csi2, unsigned int channel,
enum csi2_mode mode, bool auto_arm,
bool pack_bytes, unsigned int width,
unsigned int height, u8 vc, u8 dt);
void csi2_stop_channel(struct csi2_device *csi2, unsigned int channel);
void csi2_open_rx(struct csi2_device *csi2);
void csi2_close_rx(struct csi2_device *csi2);
int csi2_init(struct csi2_device *csi2, struct dentry *debugfs);
void csi2_uninit(struct csi2_device *csi2);
#endif
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