/* SPDX-License-Identifier: GPL-2.0 */
/*
* Marvell camera core structures .
*
* Copyright 2011 Jonathan Corbet corbet @ lwn . net
*/
#ifndef _MCAM_CORE_H
#define _MCAM_CORE_H
#include <linux/list.h>
#include <linux/clk-provider.h>
#include <linux/workqueue.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-dev.h>
#include <media/videobuf2-v4l2.h>
/*
* Create our own symbols for the supported buffer modes , but , for now ,
* base them entirely on which videobuf2 options have been selected .
*/
#if IS_ENABLED(CONFIG_VIDEOBUF2_VMALLOC)
#define MCAM_MODE_VMALLOC 1
#endif
#if IS_ENABLED(CONFIG_VIDEOBUF2_DMA_CONTIG)
#define MCAM_MODE_DMA_CONTIG 1
#endif
#if IS_ENABLED(CONFIG_VIDEOBUF2_DMA_SG)
#define MCAM_MODE_DMA_SG 1
#endif
#if !defined (MCAM_MODE_VMALLOC) && !defined (MCAM_MODE_DMA_CONTIG) && \
!defined (MCAM_MODE_DMA_SG)
#error One of the vb2 buffer modes must be selected in the config
#endif
enum mcam_state {
S_NOTREADY, /* Not yet initialized */
S_IDLE, /* Just hanging around */
S_FLAKED, /* Some sort of problem */
S_STREAMING, /* Streaming data */
S_BUFWAIT /* streaming requested but no buffers yet */
};
#define MAX_DMA_BUFS 3
/*
* Different platforms work best with different buffer modes , so we
* let the platform pick .
*/
enum mcam_buffer_mode {
B_vmalloc = 0 ,
B_DMA_contig = 1 ,
B_DMA_sg = 2
};
enum mcam_chip_id {
MCAM_CAFE,
MCAM_ARMADA610,
};
/*
* Is a given buffer mode supported by the current kernel configuration ?
*/
static inline int mcam_buffer_mode_supported(enum mcam_buffer_mode mode)
{
switch (mode) {
#ifdef MCAM_MODE_VMALLOC
case B_vmalloc:
#endif
#ifdef MCAM_MODE_DMA_CONTIG
case B_DMA_contig:
#endif
#ifdef MCAM_MODE_DMA_SG
case B_DMA_sg:
#endif
return 1 ;
default :
return 0 ;
}
}
/*
* Basic frame states
*/
struct mcam_frame_state {
unsigned int frames;
unsigned int singles;
unsigned int delivered;
};
#define NR_MCAM_CLK 3
/*
* A description of one of our devices .
* Locking : controlled by s_mutex . Certain fields , however , require
* the dev_lock spinlock ; they are marked as such by comments .
* dev_lock is also required for access to device registers .
*/
struct mcam_camera {
/*
* These fields should be set by the platform code prior to
* calling mcam_register ( ) .
*/
unsigned char __iomem *regs;
unsigned regs_size; /* size in bytes of the register space */
spinlock_t dev_lock;
struct device *dev; /* For messages, dma alloc */
enum mcam_chip_id chip_id;
enum mcam_buffer_mode buffer_mode;
int mclk_src; /* which clock source the mclk derives from */
int mclk_div; /* Clock Divider Value for MCLK */
enum v4l2_mbus_type bus_type;
/* MIPI support */
/* The dphy config value, allocated in board file
* dphy [ 0 ] : DPHY3
* dphy [ 1 ] : DPHY5
* dphy [ 2 ] : DPHY6
*/
int *dphy;
bool mipi_enabled; /* flag whether mipi is enabled already */
int lane; /* lane number */
/* clock tree support */
struct clk *clk[NR_MCAM_CLK];
struct clk_hw mclk_hw;
struct clk *mclk;
/*
* Callbacks from the core to the platform code .
*/
int (*plat_power_up) (struct mcam_camera *cam);
void (*plat_power_down) (struct mcam_camera *cam);
void (*calc_dphy) (struct mcam_camera *cam);
/*
* Everything below here is private to the mcam core and
* should not be touched by the platform code .
*/
struct v4l2_device v4l2_dev;
struct v4l2_ctrl_handler ctrl_handler;
enum mcam_state state;
unsigned long flags; /* Buffer status, mainly (dev_lock) */
struct mcam_frame_state frame_state; /* Frame state counter */
/*
* Subsystem structures .
*/
struct video_device vdev;
struct v4l2_async_notifier notifier;
struct v4l2_subdev *sensor;
/* Videobuf2 stuff */
struct vb2_queue vb_queue;
struct list_head buffers; /* Available frames */
unsigned int nbufs; /* How many are alloc'd */
int next_buf; /* Next to consume (dev_lock) */
char bus_info[32 ]; /* querycap bus_info */
/* DMA buffers - vmalloc mode */
#ifdef MCAM_MODE_VMALLOC
unsigned int dma_buf_size; /* allocated size */
void *dma_bufs[MAX_DMA_BUFS]; /* Internal buffer addresses */
dma_addr_t dma_handles[MAX_DMA_BUFS]; /* Buffer bus addresses */
struct work_struct s_bh_work;
#endif
unsigned int sequence; /* Frame sequence number */
unsigned int buf_seq[MAX_DMA_BUFS]; /* Sequence for individual bufs */
/* DMA buffers - DMA modes */
struct mcam_vb_buffer *vb_bufs[MAX_DMA_BUFS];
/* Mode-specific ops, set at open time */
void (*dma_setup)(struct mcam_camera *cam);
void (*frame_complete)(struct mcam_camera *cam, int frame);
/* Current operating parameters */
struct v4l2_pix_format pix_format;
u32 mbus_code;
/* Locks */
struct mutex s_mutex; /* Access to this structure */
};
/*
* Register I / O functions . These are here because the platform code
* may legitimately need to mess with the register space .
*/
/*
* Device register I / O
*/
static inline void mcam_reg_write(struct mcam_camera *cam, unsigned int reg,
unsigned int val)
{
iowrite32(val, cam->regs + reg);
}
static inline unsigned int mcam_reg_read(struct mcam_camera *cam,
unsigned int reg)
{
return ioread32(cam->regs + reg);
}
static inline void mcam_reg_write_mask(struct mcam_camera *cam, unsigned int reg,
unsigned int val, unsigned int mask)
{
unsigned int v = mcam_reg_read(cam, reg);
v = (v & ~mask) | (val & mask);
mcam_reg_write(cam, reg, v);
}
static inline void mcam_reg_clear_bit(struct mcam_camera *cam,
unsigned int reg, unsigned int val)
{
mcam_reg_write_mask(cam, reg, 0 , val);
}
static inline void mcam_reg_set_bit(struct mcam_camera *cam,
unsigned int reg, unsigned int val)
{
mcam_reg_write_mask(cam, reg, val, val);
}
/*
* Functions for use by platform code .
*/
int mccic_register(struct mcam_camera *cam);
int mccic_irq(struct mcam_camera *cam, unsigned int irqs);
void mccic_shutdown(struct mcam_camera *cam);
void mccic_suspend(struct mcam_camera *cam);
int mccic_resume(struct mcam_camera *cam);
/*
* Register definitions for the m88alp01 camera interface . Offsets in bytes
* as given in the spec .
*/
#define REG_Y0BAR 0 x00
#define REG_Y1BAR 0 x04
#define REG_Y2BAR 0 x08
#define REG_U0BAR 0 x0c
#define REG_U1BAR 0 x10
#define REG_U2BAR 0 x14
#define REG_V0BAR 0 x18
#define REG_V1BAR 0 x1C
#define REG_V2BAR 0 x20
/*
* register definitions for MIPI support
*/
#define REG_CSI2_CTRL0 0 x100
#define CSI2_C0_MIPI_EN (0 x1 << 0 )
#define CSI2_C0_ACT_LANE(n) ((n-1 ) << 1 )
#define REG_CSI2_DPHY3 0 x12c
#define REG_CSI2_DPHY5 0 x134
#define REG_CSI2_DPHY6 0 x138
/* ... */
#define REG_IMGPITCH 0 x24 /* Image pitch register */
#define IMGP_YP_SHFT 2 /* Y pitch params */
#define IMGP_YP_MASK 0 x00003ffc /* Y pitch field */
#define IMGP_UVP_SHFT 18 /* UV pitch (planar) */
#define IMGP_UVP_MASK 0 x3ffc0000
#define REG_IRQSTATRAW 0 x28 /* RAW IRQ Status */
#define IRQ_EOF0 0 x00000001 /* End of frame 0 */
#define IRQ_EOF1 0 x00000002 /* End of frame 1 */
#define IRQ_EOF2 0 x00000004 /* End of frame 2 */
#define IRQ_SOF0 0 x00000008 /* Start of frame 0 */
#define IRQ_SOF1 0 x00000010 /* Start of frame 1 */
#define IRQ_SOF2 0 x00000020 /* Start of frame 2 */
#define IRQ_OVERFLOW 0 x00000040 /* FIFO overflow */
#define IRQ_TWSIW 0 x00010000 /* TWSI (smbus) write */
#define IRQ_TWSIR 0 x00020000 /* TWSI read */
#define IRQ_TWSIE 0 x00040000 /* TWSI error */
#define TWSIIRQS (IRQ_TWSIW|IRQ_TWSIR|IRQ_TWSIE)
#define FRAMEIRQS (IRQ_EOF0|IRQ_EOF1|IRQ_EOF2|IRQ_SOF0|IRQ_SOF1|IRQ_SOF2)
#define ALLIRQS (TWSIIRQS|FRAMEIRQS|IRQ_OVERFLOW)
#define REG_IRQMASK 0 x2c /* IRQ mask - same bits as IRQSTAT */
#define REG_IRQSTAT 0 x30 /* IRQ status / clear */
#define REG_IMGSIZE 0 x34 /* Image size */
#define IMGSZ_V_MASK 0 x1fff0000
#define IMGSZ_V_SHIFT 16
#define IMGSZ_H_MASK 0 x00003fff
#define REG_IMGOFFSET 0 x38 /* IMage offset */
#define REG_CTRL0 0 x3c /* Control 0 */
#define C0_ENABLE 0 x00000001 /* Makes the whole thing go */
/* Mask for all the format bits */
#define C0_DF_MASK 0 x00fffffc /* Bits 2-23 */
/* RGB ordering */
#define C0_RGB4_RGBX 0 x00000000
#define C0_RGB4_XRGB 0 x00000004
#define C0_RGB4_BGRX 0 x00000008
#define C0_RGB4_XBGR 0 x0000000c
#define C0_RGB5_RGGB 0 x00000000
#define C0_RGB5_GRBG 0 x00000004
#define C0_RGB5_GBRG 0 x00000008
#define C0_RGB5_BGGR 0 x0000000c
/* Spec has two fields for DIN and DOUT, but they must match, so
combine them here. */
#define C0_DF_YUV 0 x00000000 /* Data is YUV */
#define C0_DF_RGB 0 x000000a0 /* ... RGB */
#define C0_DF_BAYER 0 x00000140 /* ... Bayer */
/* 8-8-8 must be missing from the below - ask */
#define C0_RGBF_565 0 x00000000
#define C0_RGBF_444 0 x00000800
#define C0_RGB_BGR 0 x00001000 /* Blue comes first */
#define C0_YUV_PLANAR 0 x00000000 /* YUV 422 planar format */
#define C0_YUV_PACKED 0 x00008000 /* YUV 422 packed */
#define C0_YUV_420PL 0 x0000a000 /* YUV 420 planar */
/* Think that 420 packed must be 111 - ask */
#define C0_YUVE_YUYV 0 x00000000 /* Y1CbY0Cr */
#define C0_YUVE_YVYU 0 x00010000 /* Y1CrY0Cb */
#define C0_YUVE_VYUY 0 x00020000 /* CrY1CbY0 */
#define C0_YUVE_UYVY 0 x00030000 /* CbY1CrY0 */
#define C0_YUVE_NOSWAP 0 x00000000 /* no bytes swapping */
#define C0_YUVE_SWAP13 0 x00010000 /* swap byte 1 and 3 */
#define C0_YUVE_SWAP24 0 x00020000 /* swap byte 2 and 4 */
#define C0_YUVE_SWAP1324 0 x00030000 /* swap bytes 1&3 and 2&4 */
/* Bayer bits 18,19 if needed */
#define C0_EOF_VSYNC 0 x00400000 /* Generate EOF by VSYNC */
#define C0_VEDGE_CTRL 0 x00800000 /* Detect falling edge of VSYNC */
#define C0_HPOL_LOW 0 x01000000 /* HSYNC polarity active low */
#define C0_VPOL_LOW 0 x02000000 /* VSYNC polarity active low */
#define C0_VCLK_LOW 0 x04000000 /* VCLK on falling edge */
#define C0_DOWNSCALE 0 x08000000 /* Enable downscaler */
/* SIFMODE */
#define C0_SIF_HVSYNC 0 x00000000 /* Use H/VSYNC */
#define C0_SOF_NOSYNC 0 x40000000 /* Use inband active signaling */
#define C0_SIFM_MASK 0 xc0000000 /* SIF mode bits */
/* Bits below C1_444ALPHA are not present in Cafe */
#define REG_CTRL1 0 x40 /* Control 1 */
#define C1_CLKGATE 0 x00000001 /* Sensor clock gate */
#define C1_DESC_ENA 0 x00000100 /* DMA descriptor enable */
#define C1_DESC_3WORD 0 x00000200 /* Three-word descriptors used */
#define C1_444ALPHA 0 x00f00000 /* Alpha field in RGB444 */
#define C1_ALPHA_SHFT 20
#define C1_DMAB32 0 x00000000 /* 32-byte DMA burst */
#define C1_DMAB16 0 x02000000 /* 16-byte DMA burst */
#define C1_DMAB64 0 x04000000 /* 64-byte DMA burst */
#define C1_DMAB_MASK 0 x06000000
#define C1_TWOBUFS 0 x08000000 /* Use only two DMA buffers */
#define C1_PWRDWN 0 x10000000 /* Power down */
#define REG_CLKCTRL 0 x88 /* Clock control */
#define CLK_DIV_MASK 0 x0000ffff /* Upper bits RW "reserved" */
/* This appears to be a Cafe-only register */
#define REG_UBAR 0 xc4 /* Upper base address register */
/* Armada 610 DMA descriptor registers */
#define REG_DMA_DESC_Y 0 x200
#define REG_DMA_DESC_U 0 x204
#define REG_DMA_DESC_V 0 x208
#define REG_DESC_LEN_Y 0 x20c /* Lengths are in bytes */
#define REG_DESC_LEN_U 0 x210
#define REG_DESC_LEN_V 0 x214
/*
* Useful stuff that probably belongs somewhere global .
*/
#define VGA_WIDTH 640
#define VGA_HEIGHT 480
#endif /* _MCAM_CORE_H */
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