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/*
* Copyright (C) 2012 Samsung Electronics Co., Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef FIMC_LITE_H_
#define FIMC_LITE_H_
#include <linux/sizes.h>
#include <linux/io.h>
#include <linux/irqreturn.h>
#include <linux/platform_device.h>
#include <linux/sched.h>
#include <linux/spinlock.h>
#include <linux/types.h>
#include <linux/videodev2.h>
#include <media/media-entity.h>
#include <media/videobuf2-core.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-mediabus.h>
#include <media/exynos-fimc.h>
#define FIMC_LITE_DRV_NAME "exynos-fimc-lite"
#define FLITE_CLK_NAME "flite"
#define FIMC_LITE_MAX_DEVS 3
#define FLITE_REQ_BUFS_MIN 2
#define FLITE_DEFAULT_WIDTH 640
#define FLITE_DEFAULT_HEIGHT 480
/* Bit index definitions for struct fimc_lite::state */
enum {
ST_FLITE_LPM,
ST_FLITE_PENDING,
ST_FLITE_RUN,
ST_FLITE_STREAM,
ST_FLITE_SUSPENDED,
ST_FLITE_OFF,
ST_FLITE_IN_USE,
ST_FLITE_CONFIG,
ST_SENSOR_STREAM,
};
#define FLITE_SD_PAD_SINK 0
#define FLITE_SD_PAD_SOURCE_DMA 1
#define FLITE_SD_PAD_SOURCE_ISP 2
#define FLITE_SD_PADS_NUM 3
/**
* struct flite_drvdata - FIMC-LITE IP variant data structure
* @max_width: maximum camera interface input width in pixels
* @max_height: maximum camera interface input height in pixels
* @out_width_align: minimum output width alignment in pixels
* @win_hor_offs_align: minimum camera interface crop window horizontal
* offset alignment in pixels
* @out_hor_offs_align: minimum output DMA compose rectangle horizontal
* offset alignment in pixels
* @max_dma_bufs: number of output DMA buffer start address registers
* @num_instances: total number of FIMC-LITE IP instances available
*/
struct flite_drvdata {
unsigned short max_width;
unsigned short max_height;
unsigned short out_width_align;
unsigned short win_hor_offs_align;
unsigned short out_hor_offs_align;
unsigned short max_dma_bufs;
unsigned short num_instances;
};
struct fimc_lite_events {
unsigned int data_overflow;
};
#define FLITE_MAX_PLANES 1
/**
* struct flite_frame - source/target frame properties
* @f_width: full pixel width
* @f_height: full pixel height
* @rect: crop/composition rectangle
* @fmt: pointer to pixel format description data structure
*/
struct flite_frame {
u16 f_width;
u16 f_height;
struct v4l2_rect rect;
const struct fimc_fmt *fmt;
};
/**
* struct flite_buffer - video buffer structure
* @vb: vb2 buffer
* @list: list head for the buffers queue
* @paddr: DMA buffer start address
* @index: DMA start address register's index
*/
struct flite_buffer {
struct vb2_buffer vb;
struct list_head list;
dma_addr_t paddr;
unsigned short index;
};
/**
* struct fimc_lite - fimc lite structure
* @pdev: pointer to FIMC-LITE platform device
* @dd: SoC specific driver data structure
* @ve: exynos video device entity structure
* @v4l2_dev: pointer to top the level v4l2_device
* @fh: v4l2 file handle
* @alloc_ctx: videobuf2 memory allocator context
* @subdev: FIMC-LITE subdev
* @vd_pad: media (sink) pad for the capture video node
* @subdev_pads: the subdev media pads
* @sensor: sensor subdev attached to FIMC-LITE directly or through MIPI-CSIS
* @ctrl_handler: v4l2 control handler
* @test_pattern: test pattern controls
* @index: FIMC-LITE platform device index
* @pipeline: video capture pipeline data structure
* @pipeline_ops: media pipeline ops for the video node driver
* @slock: spinlock protecting this data structure and the hw registers
* @lock: mutex serializing video device and the subdev operations
* @clock: FIMC-LITE gate clock
* @regs: memory mapped io registers
* @irq_queue: interrupt handler waitqueue
* @payload: image size in bytes (w x h x bpp)
* @inp_frame: camera input frame structure
* @out_frame: DMA output frame structure
* @out_path: output data path (DMA or FIFO)
* @source_subdev_grp_id: source subdev group id
* @state: driver state flags
* @pending_buf_q: pending buffers queue head
* @active_buf_q: the queue head of buffers scheduled in hardware
* @vb_queue: vb2 buffers queue
* @buf_index: helps to keep track of the DMA start address register index
* @active_buf_count: number of video buffers scheduled in hardware
* @frame_count: the captured frames counter
* @reqbufs_count: the number of buffers requested with REQBUFS ioctl
*/
struct fimc_lite {
struct platform_device *pdev;
struct flite_drvdata *dd;
struct exynos_video_entity ve;
struct v4l2_device *v4l2_dev;
struct v4l2_fh fh;
struct vb2_alloc_ctx *alloc_ctx;
struct v4l2_subdev subdev;
struct media_pad vd_pad;
struct media_pad subdev_pads[FLITE_SD_PADS_NUM];
struct v4l2_subdev *sensor;
struct v4l2_ctrl_handler ctrl_handler;
struct v4l2_ctrl *test_pattern;
int index;
struct mutex lock;
spinlock_t slock;
struct clk *clock;
void __iomem *regs;
wait_queue_head_t irq_queue;
unsigned long payload[FLITE_MAX_PLANES];
struct flite_frame inp_frame;
struct flite_frame out_frame;
atomic_t out_path;
unsigned int source_subdev_grp_id;
unsigned long state;
struct list_head pending_buf_q;
struct list_head active_buf_q;
struct vb2_queue vb_queue;
unsigned short buf_index;
unsigned int frame_count;
unsigned int reqbufs_count;
struct fimc_lite_events events;
bool streaming;
};
static inline bool fimc_lite_active(struct fimc_lite *fimc)
{
unsigned long flags;
bool ret;
spin_lock_irqsave(&fimc->slock, flags);
ret = fimc->state & (1 << ST_FLITE_RUN) ||
fimc->state & (1 << ST_FLITE_PENDING);
spin_unlock_irqrestore(&fimc->slock, flags);
return ret;
}
static inline void fimc_lite_active_queue_add(struct fimc_lite *dev,
struct flite_buffer *buf)
{
list_add_tail(&buf->list, &dev->active_buf_q);
}
static inline struct flite_buffer *fimc_lite_active_queue_pop(
struct fimc_lite *dev)
{
struct flite_buffer *buf = list_entry(dev->active_buf_q.next,
struct flite_buffer, list);
list_del(&buf->list);
return buf;
}
static inline void fimc_lite_pending_queue_add(struct fimc_lite *dev,
struct flite_buffer *buf)
{
list_add_tail(&buf->list, &dev->pending_buf_q);
}
static inline struct flite_buffer *fimc_lite_pending_queue_pop(
struct fimc_lite *dev)
{
struct flite_buffer *buf = list_entry(dev->pending_buf_q.next,
struct flite_buffer, list);
list_del(&buf->list);
return buf;
}
#endif /* FIMC_LITE_H_ */
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