/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Marvell camera core structures.
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*
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* Copyright 2011 Jonathan Corbet corbet@lwn.net
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*/
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#ifndef _MCAM_CORE_H
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#define _MCAM_CORE_H
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#include <linux/list.h>
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#include <linux/clk-provider.h>
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#include <media/v4l2-common.h>
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-dev.h>
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#include <media/videobuf2-v4l2.h>
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/*
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* Create our own symbols for the supported buffer modes, but, for now,
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* base them entirely on which videobuf2 options have been selected.
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*/
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#if IS_ENABLED(CONFIG_VIDEOBUF2_VMALLOC)
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#define MCAM_MODE_VMALLOC 1
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#endif
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#if IS_ENABLED(CONFIG_VIDEOBUF2_DMA_CONTIG)
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#define MCAM_MODE_DMA_CONTIG 1
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#endif
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#if IS_ENABLED(CONFIG_VIDEOBUF2_DMA_SG)
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#define MCAM_MODE_DMA_SG 1
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#endif
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#if !defined(MCAM_MODE_VMALLOC) && !defined(MCAM_MODE_DMA_CONTIG) && \
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!defined(MCAM_MODE_DMA_SG)
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#error One of the videobuf buffer modes must be selected in the config
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#endif
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enum mcam_state {
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S_NOTREADY, /* Not yet initialized */
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S_IDLE, /* Just hanging around */
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S_FLAKED, /* Some sort of problem */
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S_STREAMING, /* Streaming data */
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S_BUFWAIT /* streaming requested but no buffers yet */
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};
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#define MAX_DMA_BUFS 3
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/*
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* Different platforms work best with different buffer modes, so we
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* let the platform pick.
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*/
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enum mcam_buffer_mode {
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B_vmalloc = 0,
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B_DMA_contig = 1,
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B_DMA_sg = 2
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};
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enum mcam_chip_id {
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MCAM_CAFE,
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MCAM_ARMADA610,
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};
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/*
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* Is a given buffer mode supported by the current kernel configuration?
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*/
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static inline int mcam_buffer_mode_supported(enum mcam_buffer_mode mode)
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{
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switch (mode) {
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#ifdef MCAM_MODE_VMALLOC
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case B_vmalloc:
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#endif
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#ifdef MCAM_MODE_DMA_CONTIG
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case B_DMA_contig:
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#endif
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#ifdef MCAM_MODE_DMA_SG
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case B_DMA_sg:
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#endif
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return 1;
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default:
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return 0;
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}
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}
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/*
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* Basic frame states
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*/
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struct mcam_frame_state {
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unsigned int frames;
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unsigned int singles;
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unsigned int delivered;
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};
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#define NR_MCAM_CLK 3
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/*
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* A description of one of our devices.
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* Locking: controlled by s_mutex. Certain fields, however, require
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* the dev_lock spinlock; they are marked as such by comments.
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* dev_lock is also required for access to device registers.
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*/
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struct mcam_camera {
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/*
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* These fields should be set by the platform code prior to
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* calling mcam_register().
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*/
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unsigned char __iomem *regs;
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unsigned regs_size; /* size in bytes of the register space */
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spinlock_t dev_lock;
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struct device *dev; /* For messages, dma alloc */
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enum mcam_chip_id chip_id;
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enum mcam_buffer_mode buffer_mode;
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int mclk_src; /* which clock source the mclk derives from */
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int mclk_div; /* Clock Divider Value for MCLK */
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enum v4l2_mbus_type bus_type;
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/* MIPI support */
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/* The dphy config value, allocated in board file
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* dphy[0]: DPHY3
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* dphy[1]: DPHY5
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* dphy[2]: DPHY6
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*/
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int *dphy;
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bool mipi_enabled; /* flag whether mipi is enabled already */
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int lane; /* lane number */
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/* clock tree support */
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struct clk *clk[NR_MCAM_CLK];
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struct clk_hw mclk_hw;
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struct clk *mclk;
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/*
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* Callbacks from the core to the platform code.
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*/
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int (*plat_power_up) (struct mcam_camera *cam);
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void (*plat_power_down) (struct mcam_camera *cam);
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void (*calc_dphy) (struct mcam_camera *cam);
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/*
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* Everything below here is private to the mcam core and
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* should not be touched by the platform code.
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*/
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struct v4l2_device v4l2_dev;
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struct v4l2_ctrl_handler ctrl_handler;
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enum mcam_state state;
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unsigned long flags; /* Buffer status, mainly (dev_lock) */
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struct mcam_frame_state frame_state; /* Frame state counter */
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/*
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* Subsystem structures.
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*/
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struct video_device vdev;
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struct v4l2_async_notifier notifier;
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struct v4l2_async_subdev asd;
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struct v4l2_subdev *sensor;
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/* Videobuf2 stuff */
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struct vb2_queue vb_queue;
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struct list_head buffers; /* Available frames */
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unsigned int nbufs; /* How many are alloc'd */
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int next_buf; /* Next to consume (dev_lock) */
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char bus_info[32]; /* querycap bus_info */
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/* DMA buffers - vmalloc mode */
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#ifdef MCAM_MODE_VMALLOC
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unsigned int dma_buf_size; /* allocated size */
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void *dma_bufs[MAX_DMA_BUFS]; /* Internal buffer addresses */
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dma_addr_t dma_handles[MAX_DMA_BUFS]; /* Buffer bus addresses */
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struct tasklet_struct s_tasklet;
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#endif
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unsigned int sequence; /* Frame sequence number */
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unsigned int buf_seq[MAX_DMA_BUFS]; /* Sequence for individual bufs */
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/* DMA buffers - DMA modes */
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struct mcam_vb_buffer *vb_bufs[MAX_DMA_BUFS];
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/* Mode-specific ops, set at open time */
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void (*dma_setup)(struct mcam_camera *cam);
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void (*frame_complete)(struct mcam_camera *cam, int frame);
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/* Current operating parameters */
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struct v4l2_pix_format pix_format;
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u32 mbus_code;
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/* Locks */
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struct mutex s_mutex; /* Access to this structure */
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};
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/*
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* Register I/O functions. These are here because the platform code
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* may legitimately need to mess with the register space.
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*/
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/*
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* Device register I/O
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*/
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static inline void mcam_reg_write(struct mcam_camera *cam, unsigned int reg,
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unsigned int val)
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{
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iowrite32(val, cam->regs + reg);
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}
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static inline unsigned int mcam_reg_read(struct mcam_camera *cam,
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unsigned int reg)
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{
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return ioread32(cam->regs + reg);
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}
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static inline void mcam_reg_write_mask(struct mcam_camera *cam, unsigned int reg,
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unsigned int val, unsigned int mask)
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{
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unsigned int v = mcam_reg_read(cam, reg);
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v = (v & ~mask) | (val & mask);
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mcam_reg_write(cam, reg, v);
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}
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static inline void mcam_reg_clear_bit(struct mcam_camera *cam,
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unsigned int reg, unsigned int val)
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{
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mcam_reg_write_mask(cam, reg, 0, val);
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}
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static inline void mcam_reg_set_bit(struct mcam_camera *cam,
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unsigned int reg, unsigned int val)
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{
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mcam_reg_write_mask(cam, reg, val, val);
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}
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/*
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* Functions for use by platform code.
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*/
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int mccic_register(struct mcam_camera *cam);
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int mccic_irq(struct mcam_camera *cam, unsigned int irqs);
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void mccic_shutdown(struct mcam_camera *cam);
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void mccic_suspend(struct mcam_camera *cam);
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int mccic_resume(struct mcam_camera *cam);
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/*
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* Register definitions for the m88alp01 camera interface. Offsets in bytes
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* as given in the spec.
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*/
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#define REG_Y0BAR 0x00
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#define REG_Y1BAR 0x04
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#define REG_Y2BAR 0x08
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#define REG_U0BAR 0x0c
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#define REG_U1BAR 0x10
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#define REG_U2BAR 0x14
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#define REG_V0BAR 0x18
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#define REG_V1BAR 0x1C
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#define REG_V2BAR 0x20
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/*
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* register definitions for MIPI support
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*/
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#define REG_CSI2_CTRL0 0x100
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#define CSI2_C0_MIPI_EN (0x1 << 0)
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#define CSI2_C0_ACT_LANE(n) ((n-1) << 1)
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#define REG_CSI2_DPHY3 0x12c
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#define REG_CSI2_DPHY5 0x134
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#define REG_CSI2_DPHY6 0x138
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/* ... */
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#define REG_IMGPITCH 0x24 /* Image pitch register */
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#define IMGP_YP_SHFT 2 /* Y pitch params */
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#define IMGP_YP_MASK 0x00003ffc /* Y pitch field */
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#define IMGP_UVP_SHFT 18 /* UV pitch (planar) */
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#define IMGP_UVP_MASK 0x3ffc0000
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#define REG_IRQSTATRAW 0x28 /* RAW IRQ Status */
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#define IRQ_EOF0 0x00000001 /* End of frame 0 */
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#define IRQ_EOF1 0x00000002 /* End of frame 1 */
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#define IRQ_EOF2 0x00000004 /* End of frame 2 */
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#define IRQ_SOF0 0x00000008 /* Start of frame 0 */
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#define IRQ_SOF1 0x00000010 /* Start of frame 1 */
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#define IRQ_SOF2 0x00000020 /* Start of frame 2 */
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#define IRQ_OVERFLOW 0x00000040 /* FIFO overflow */
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#define IRQ_TWSIW 0x00010000 /* TWSI (smbus) write */
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#define IRQ_TWSIR 0x00020000 /* TWSI read */
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#define IRQ_TWSIE 0x00040000 /* TWSI error */
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#define TWSIIRQS (IRQ_TWSIW|IRQ_TWSIR|IRQ_TWSIE)
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#define FRAMEIRQS (IRQ_EOF0|IRQ_EOF1|IRQ_EOF2|IRQ_SOF0|IRQ_SOF1|IRQ_SOF2)
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#define ALLIRQS (TWSIIRQS|FRAMEIRQS|IRQ_OVERFLOW)
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#define REG_IRQMASK 0x2c /* IRQ mask - same bits as IRQSTAT */
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#define REG_IRQSTAT 0x30 /* IRQ status / clear */
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#define REG_IMGSIZE 0x34 /* Image size */
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#define IMGSZ_V_MASK 0x1fff0000
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#define IMGSZ_V_SHIFT 16
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#define IMGSZ_H_MASK 0x00003fff
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#define REG_IMGOFFSET 0x38 /* IMage offset */
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#define REG_CTRL0 0x3c /* Control 0 */
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#define C0_ENABLE 0x00000001 /* Makes the whole thing go */
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/* Mask for all the format bits */
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#define C0_DF_MASK 0x00fffffc /* Bits 2-23 */
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/* RGB ordering */
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#define C0_RGB4_RGBX 0x00000000
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#define C0_RGB4_XRGB 0x00000004
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#define C0_RGB4_BGRX 0x00000008
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#define C0_RGB4_XBGR 0x0000000c
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#define C0_RGB5_RGGB 0x00000000
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#define C0_RGB5_GRBG 0x00000004
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#define C0_RGB5_GBRG 0x00000008
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#define C0_RGB5_BGGR 0x0000000c
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/* Spec has two fields for DIN and DOUT, but they must match, so
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combine them here. */
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#define C0_DF_YUV 0x00000000 /* Data is YUV */
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#define C0_DF_RGB 0x000000a0 /* ... RGB */
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#define C0_DF_BAYER 0x00000140 /* ... Bayer */
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/* 8-8-8 must be missing from the below - ask */
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#define C0_RGBF_565 0x00000000
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#define C0_RGBF_444 0x00000800
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#define C0_RGB_BGR 0x00001000 /* Blue comes first */
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#define C0_YUV_PLANAR 0x00000000 /* YUV 422 planar format */
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#define C0_YUV_PACKED 0x00008000 /* YUV 422 packed */
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#define C0_YUV_420PL 0x0000a000 /* YUV 420 planar */
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/* Think that 420 packed must be 111 - ask */
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#define C0_YUVE_YUYV 0x00000000 /* Y1CbY0Cr */
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#define C0_YUVE_YVYU 0x00010000 /* Y1CrY0Cb */
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#define C0_YUVE_VYUY 0x00020000 /* CrY1CbY0 */
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#define C0_YUVE_UYVY 0x00030000 /* CbY1CrY0 */
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#define C0_YUVE_NOSWAP 0x00000000 /* no bytes swapping */
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#define C0_YUVE_SWAP13 0x00010000 /* swap byte 1 and 3 */
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#define C0_YUVE_SWAP24 0x00020000 /* swap byte 2 and 4 */
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#define C0_YUVE_SWAP1324 0x00030000 /* swap bytes 1&3 and 2&4 */
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/* Bayer bits 18,19 if needed */
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#define C0_EOF_VSYNC 0x00400000 /* Generate EOF by VSYNC */
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#define C0_VEDGE_CTRL 0x00800000 /* Detect falling edge of VSYNC */
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#define C0_HPOL_LOW 0x01000000 /* HSYNC polarity active low */
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#define C0_VPOL_LOW 0x02000000 /* VSYNC polarity active low */
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#define C0_VCLK_LOW 0x04000000 /* VCLK on falling edge */
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#define C0_DOWNSCALE 0x08000000 /* Enable downscaler */
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/* SIFMODE */
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#define C0_SIF_HVSYNC 0x00000000 /* Use H/VSYNC */
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#define C0_SOF_NOSYNC 0x40000000 /* Use inband active signaling */
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#define C0_SIFM_MASK 0xc0000000 /* SIF mode bits */
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/* Bits below C1_444ALPHA are not present in Cafe */
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#define REG_CTRL1 0x40 /* Control 1 */
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#define C1_CLKGATE 0x00000001 /* Sensor clock gate */
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#define C1_DESC_ENA 0x00000100 /* DMA descriptor enable */
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#define C1_DESC_3WORD 0x00000200 /* Three-word descriptors used */
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#define C1_444ALPHA 0x00f00000 /* Alpha field in RGB444 */
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#define C1_ALPHA_SHFT 20
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#define C1_DMAB32 0x00000000 /* 32-byte DMA burst */
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#define C1_DMAB16 0x02000000 /* 16-byte DMA burst */
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#define C1_DMAB64 0x04000000 /* 64-byte DMA burst */
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#define C1_DMAB_MASK 0x06000000
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#define C1_TWOBUFS 0x08000000 /* Use only two DMA buffers */
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#define C1_PWRDWN 0x10000000 /* Power down */
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#define REG_CLKCTRL 0x88 /* Clock control */
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#define CLK_DIV_MASK 0x0000ffff /* Upper bits RW "reserved" */
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/* This appears to be a Cafe-only register */
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#define REG_UBAR 0xc4 /* Upper base address register */
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/* Armada 610 DMA descriptor registers */
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#define REG_DMA_DESC_Y 0x200
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#define REG_DMA_DESC_U 0x204
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#define REG_DMA_DESC_V 0x208
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#define REG_DESC_LEN_Y 0x20c /* Lengths are in bytes */
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#define REG_DESC_LEN_U 0x210
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#define REG_DESC_LEN_V 0x214
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/*
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* Useful stuff that probably belongs somewhere global.
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*/
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#define VGA_WIDTH 640
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#define VGA_HEIGHT 480
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#endif /* _MCAM_CORE_H */
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