/* SPDX-License-Identifier: GPL-2.0-only */
/*
* TI Camera Access Layer ( CAL )
*
* Copyright ( c ) 2015 - 2020 Texas Instruments Inc .
*
* Authors :
* Benoit Parrot < bparrot @ ti . com >
* Laurent Pinchart < laurent . pinchart @ ideasonboard . com >
*/
#ifndef __TI_CAL_H__
#define __TI_CAL_H__
#include <linux/bitfield.h>
#include <linux/io.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/spinlock.h>
#include <linux/videodev2.h>
#include <linux/wait.h>
#include <media/media-device.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/v4l2-subdev.h>
#include <media/videobuf2-v4l2.h>
#define CAL_MODULE_NAME "cal"
#define CAL_MAX_NUM_CONTEXT 8
#define CAL_NUM_CSI2_PORTS 2
/*
* The width is limited by the size of the CAL_WR_DMA_XSIZE_j . XSIZE field ,
* expressed in multiples of 64 bits . The height is limited by the size of the
* CAL_CSI2_CTXi_j . CTXi_LINES and CAL_WR_DMA_CTRL_j . YSIZE fields , expressed in
* lines .
*/
#define CAL_MIN_WIDTH_BYTES 16
#define CAL_MAX_WIDTH_BYTES (8192 * 8 )
#define CAL_MIN_HEIGHT_LINES 1
#define CAL_MAX_HEIGHT_LINES 16383
#define CAL_CAMERARX_PAD_SINK 0
#define CAL_CAMERARX_PAD_FIRST_SOURCE 1
#define CAL_CAMERARX_NUM_SOURCE_PADS 8
#define CAL_CAMERARX_NUM_PADS (1 + CAL_CAMERARX_NUM_SOURCE_PADS)
static inline bool cal_rx_pad_is_sink(u32 pad)
{
/* Camera RX has 1 sink pad, and N source pads */
return pad == 0 ;
}
static inline bool cal_rx_pad_is_source(u32 pad)
{
/* Camera RX has 1 sink pad, and N source pads */
return pad >= CAL_CAMERARX_PAD_FIRST_SOURCE &&
pad <= CAL_CAMERARX_NUM_SOURCE_PADS;
}
struct device;
struct device_node;
struct resource;
struct regmap;
struct regmap_fied;
/* CTRL_CORE_CAMERRX_CONTROL register field id */
enum cal_camerarx_field {
F_CTRLCLKEN,
F_CAMMODE,
F_LANEENABLE,
F_CSI_MODE,
F_MAX_FIELDS,
};
enum cal_dma_state {
CAL_DMA_RUNNING,
CAL_DMA_STOP_REQUESTED,
CAL_DMA_STOP_PENDING,
CAL_DMA_STOPPED,
};
struct cal_format_info {
u32 fourcc;
u32 code;
/* Bits per pixel */
u8 bpp;
bool meta;
};
/* buffer for one video frame */
struct cal_buffer {
/* common v4l buffer stuff -- must be first */
struct vb2_v4l2_buffer vb;
struct list_head list;
};
/**
* struct cal_dmaqueue - Queue of DMA buffers
*/
struct cal_dmaqueue {
/**
* @ lock : Protects all fields in the cal_dmaqueue .
*/
spinlock_t lock;
/**
* @ queue : Buffers queued to the driver and waiting for DMA processing .
* Buffers are added to the list by the vb2 . buffer_queue ( ) operation ,
* and move to @ pending when they are scheduled for the next frame .
*/
struct list_head queue;
/**
* @ pending : Buffer provided to the hardware to DMA the next frame .
* Will move to @ active at the end of the current frame .
*/
struct cal_buffer *pending;
/**
* @ active : Buffer being DMA ' ed to for the current frame . Will be
* retired and given back to vb2 at the end of the current frame if
* a @ pending buffer has been scheduled to replace it .
*/
struct cal_buffer *active;
/** @state: State of the DMA engine. */
enum cal_dma_state state;
/** @wait: Wait queue to signal a @state transition to CAL_DMA_STOPPED. */
struct wait_queue_head wait;
};
struct cal_camerarx_data {
struct {
unsigned int lsb;
unsigned int msb;
} fields[F_MAX_FIELDS];
unsigned int num_lanes;
};
struct cal_data {
const struct cal_camerarx_data *camerarx;
unsigned int num_csi2_phy;
unsigned int flags;
};
/*
* The Camera Adaptation Layer ( CAL ) module is paired with one or more complex
* I / O PHYs ( CAMERARX ) . It contains multiple instances of CSI - 2 , processing and
* DMA contexts .
*
* The cal_dev structure represents the whole subsystem , including the CAL and
* the CAMERARX instances . Instances of struct cal_dev are named cal through the
* driver .
*
* The cal_camerarx structure represents one CAMERARX instance . Instances of
* cal_camerarx are named phy through the driver .
*
* The cal_ctx structure represents the combination of one CSI - 2 context , one
* processing context and one DMA context . Instance of struct cal_ctx are named
* ctx through the driver .
*/
struct cal_camerarx {
void __iomem *base;
struct resource *res;
struct regmap_field *fields[F_MAX_FIELDS];
struct cal_dev *cal;
unsigned int instance;
struct v4l2_fwnode_endpoint endpoint;
struct device_node *source_ep_node;
struct device_node *source_node;
struct v4l2_subdev *source;
unsigned int source_pad;
struct v4l2_subdev subdev;
struct media_pad pads[CAL_CAMERARX_NUM_PADS];
/* protects the vc_* fields below */
spinlock_t vc_lock;
u8 vc_enable_count[4 ];
u16 vc_frame_number[4 ];
u32 vc_sequence[4 ];
unsigned int enable_count;
};
struct cal_dev {
struct clk *fclk;
int irq;
void __iomem *base;
struct resource *res;
struct device *dev;
const struct cal_data *data;
u32 revision;
/* Control Module handle */
struct regmap *syscon_camerrx;
u32 syscon_camerrx_offset;
/* Camera Core Module handle */
struct cal_camerarx *phy[CAL_NUM_CSI2_PORTS];
u32 num_contexts;
struct cal_ctx *ctx[CAL_MAX_NUM_CONTEXT];
struct media_device mdev;
struct v4l2_device v4l2_dev;
struct v4l2_async_notifier notifier;
unsigned long reserved_pix_proc_mask;
};
/*
* There is one cal_ctx structure for each camera core context .
*/
struct cal_ctx {
struct v4l2_ctrl_handler ctrl_handler;
struct video_device vdev;
struct media_pad pad;
struct cal_dev *cal;
struct cal_camerarx *phy;
/* v4l2_ioctl mutex */
struct mutex mutex;
struct cal_dmaqueue dma;
/* video capture */
const struct cal_format_info *fmtinfo;
/* Used to store current pixel format */
struct v4l2_format v_fmt;
/* Current subdev enumerated format (legacy) */
const struct cal_format_info **active_fmt;
unsigned int num_active_fmt;
struct vb2_queue vb_vidq;
u8 dma_ctx;
u8 cport;
u8 csi2_ctx;
u8 pix_proc;
u8 vc;
u8 datatype;
bool use_pix_proc;
};
extern unsigned int cal_debug;
extern int cal_video_nr;
extern bool cal_mc_api;
#define cal_dbg(level, cal, fmt, arg...) \
do { \
if (cal_debug >= (level)) \
dev_printk(KERN_DEBUG, (cal)->dev, fmt, ## arg); \
} while (0 )
#define cal_info(cal, fmt, arg...) \
dev_info((cal)->dev, fmt, ## arg)
#define cal_err(cal, fmt, arg...) \
dev_err((cal)->dev, fmt, ## arg)
#define ctx_dbg(level, ctx, fmt, arg...) \
cal_dbg(level, (ctx)->cal, "ctx%u: " fmt, (ctx)->dma_ctx, ## arg)
#define ctx_info(ctx, fmt, arg...) \
cal_info((ctx)->cal, "ctx%u: " fmt, (ctx)->dma_ctx, ## arg)
#define ctx_err(ctx, fmt, arg...) \
cal_err((ctx)->cal, "ctx%u: " fmt, (ctx)->dma_ctx, ## arg)
#define phy_dbg(level, phy, fmt, arg...) \
cal_dbg(level, (phy)->cal, "phy%u: " fmt, (phy)->instance, ## arg)
#define phy_info(phy, fmt, arg...) \
cal_info((phy)->cal, "phy%u: " fmt, (phy)->instance, ## arg)
#define phy_err(phy, fmt, arg...) \
cal_err((phy)->cal, "phy%u: " fmt, (phy)->instance, ## arg)
static inline u32 cal_read(struct cal_dev *cal, u32 offset)
{
return ioread32(cal->base + offset);
}
static inline void cal_write(struct cal_dev *cal, u32 offset, u32 val)
{
iowrite32(val, cal->base + offset);
}
static __always_inline u32 cal_read_field(struct cal_dev *cal, u32 offset, u32 mask)
{
return FIELD_GET(mask, cal_read(cal, offset));
}
static inline void cal_write_field(struct cal_dev *cal, u32 offset, u32 value,
u32 mask)
{
u32 val = cal_read(cal, offset);
val &= ~mask;
val |= (value << __ffs(mask)) & mask;
cal_write(cal, offset, val);
}
static inline void cal_set_field(u32 *valp, u32 field, u32 mask)
{
u32 val = *valp;
val &= ~mask;
val |= (field << __ffs(mask)) & mask;
*valp = val;
}
extern const struct cal_format_info cal_formats[];
extern const unsigned int cal_num_formats;
const struct cal_format_info *cal_format_by_fourcc(u32 fourcc);
const struct cal_format_info *cal_format_by_code(u32 code);
void cal_quickdump_regs(struct cal_dev *cal);
struct cal_camerarx *cal_camerarx_get_phy_from_entity(struct media_entity *entity);
void cal_camerarx_disable(struct cal_camerarx *phy);
void cal_camerarx_i913_errata(struct cal_camerarx *phy);
struct cal_camerarx *cal_camerarx_create(struct cal_dev *cal,
unsigned int instance);
void cal_camerarx_destroy(struct cal_camerarx *phy);
int cal_ctx_prepare(struct cal_ctx *ctx);
void cal_ctx_unprepare(struct cal_ctx *ctx);
void cal_ctx_set_dma_addr(struct cal_ctx *ctx, dma_addr_t addr);
void cal_ctx_start(struct cal_ctx *ctx);
void cal_ctx_stop(struct cal_ctx *ctx);
int cal_ctx_v4l2_register(struct cal_ctx *ctx);
void cal_ctx_v4l2_unregister(struct cal_ctx *ctx);
int cal_ctx_v4l2_init(struct cal_ctx *ctx);
void cal_ctx_v4l2_cleanup(struct cal_ctx *ctx);
#endif /* __TI_CAL_H__ */
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