[linux-2.6-block.git] / drivers / media / platform / omap3isp / ispvideo.h

/*
 * ispvideo.h
 *
 * TI OMAP3 ISP - Generic video node
 *
 * Copyright (C) 2009-2010 Nokia Corporation
 *
 * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
 *	     Sakari Ailus <sakari.ailus@iki.fi>
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 */

#ifndef OMAP3_ISP_VIDEO_H
#define OMAP3_ISP_VIDEO_H

#include <linux/v4l2-mediabus.h>
#include <media/media-entity.h>
#include <media/v4l2-dev.h>
#include <media/v4l2-fh.h>
#include <media/videobuf2-core.h>

#define ISP_VIDEO_DRIVER_NAME		"ispvideo"
#define ISP_VIDEO_DRIVER_VERSION	"0.0.2"

struct isp_device;
struct isp_video;
struct v4l2_mbus_framefmt;
struct v4l2_pix_format;

/*
 * struct isp_format_info - ISP media bus format information
 * @code: V4L2 media bus format code
 * @truncated: V4L2 media bus format code for the same format truncated to 10
 *	bits. Identical to @code if the format is 10 bits wide or less.
 * @uncompressed: V4L2 media bus format code for the corresponding uncompressed
 *	format. Identical to @code if the format is not DPCM compressed.
 * @flavor: V4L2 media bus format code for the same pixel layout but
 *	shifted to be 8 bits per pixel. =0 if format is not shiftable.
 * @pixelformat: V4L2 pixel format FCC identifier
 * @width: Bits per pixel (when transferred over a bus)
 * @bpp: Bytes per pixel (when stored in memory)
 */
struct isp_format_info {
	enum v4l2_mbus_pixelcode code;
	enum v4l2_mbus_pixelcode truncated;
	enum v4l2_mbus_pixelcode uncompressed;
	enum v4l2_mbus_pixelcode flavor;
	u32 pixelformat;
	unsigned int width;
	unsigned int bpp;
};

enum isp_pipeline_stream_state {
	ISP_PIPELINE_STREAM_STOPPED = 0,
	ISP_PIPELINE_STREAM_CONTINUOUS = 1,
	ISP_PIPELINE_STREAM_SINGLESHOT = 2,
};

enum isp_pipeline_state {
	/* The stream has been started on the input video node. */
	ISP_PIPELINE_STREAM_INPUT = 1,
	/* The stream has been started on the output video node. */
	ISP_PIPELINE_STREAM_OUTPUT = 2,
	/* At least one buffer is queued on the input video node. */
	ISP_PIPELINE_QUEUE_INPUT = 4,
	/* At least one buffer is queued on the output video node. */
	ISP_PIPELINE_QUEUE_OUTPUT = 8,
	/* The input entity is idle, ready to be started. */
	ISP_PIPELINE_IDLE_INPUT = 16,
	/* The output entity is idle, ready to be started. */
	ISP_PIPELINE_IDLE_OUTPUT = 32,
	/* The pipeline is currently streaming. */
	ISP_PIPELINE_STREAM = 64,
};

/*
 * struct isp_pipeline - An ISP hardware pipeline
 * @error: A hardware error occurred during capture
 * @entities: Bitmask of entities in the pipeline (indexed by entity ID)
 */
struct isp_pipeline {
	struct media_pipeline pipe;
	spinlock_t lock;		/* Pipeline state and queue flags */
	unsigned int state;
	enum isp_pipeline_stream_state stream_state;
	struct isp_video *input;
	struct isp_video *output;
	u32 entities;
	unsigned long l3_ick;
	unsigned int max_rate;
	atomic_t frame_number;
	bool do_propagation; /* of frame number */
	bool error;
	struct v4l2_fract max_timeperframe;
	struct v4l2_subdev *external;
	unsigned int external_rate;
	unsigned int external_width;
};

#define to_isp_pipeline(__e) \
	container_of((__e)->pipe, struct isp_pipeline, pipe)

static inline int isp_pipeline_ready(struct isp_pipeline *pipe)
{
	return pipe->state == (ISP_PIPELINE_STREAM_INPUT |
			       ISP_PIPELINE_STREAM_OUTPUT |
			       ISP_PIPELINE_QUEUE_INPUT |
			       ISP_PIPELINE_QUEUE_OUTPUT |
			       ISP_PIPELINE_IDLE_INPUT |
			       ISP_PIPELINE_IDLE_OUTPUT);
}

/**
 * struct isp_buffer - ISP video buffer
 * @vb: videobuf2 buffer
 * @irqlist: List head for insertion into IRQ queue
 * @dma: DMA address
 */
struct isp_buffer {
	struct vb2_buffer vb;
	struct list_head irqlist;
	dma_addr_t dma;
};

#define to_isp_buffer(buf)	container_of(buf, struct isp_buffer, vb)

enum isp_video_dmaqueue_flags {
	/* Set if DMA queue becomes empty when ISP_PIPELINE_STREAM_CONTINUOUS */
	ISP_VIDEO_DMAQUEUE_UNDERRUN = (1 << 0),
	/* Set when queuing buffer to an empty DMA queue */
	ISP_VIDEO_DMAQUEUE_QUEUED = (1 << 1),
};

#define isp_video_dmaqueue_flags_clr(video)	\
			({ (video)->dmaqueue_flags = 0; })

/*
 * struct isp_video_operations - ISP video operations
 * @queue:	Resume streaming when a buffer is queued. Called on VIDIOC_QBUF
 *		if there was no buffer previously queued.
 */
struct isp_video_operations {
	int(*queue)(struct isp_video *video, struct isp_buffer *buffer);
};

struct isp_video {
	struct video_device video;
	enum v4l2_buf_type type;
	struct media_pad pad;

	struct mutex mutex;		/* format and crop settings */
	atomic_t active;

	struct isp_device *isp;

	unsigned int capture_mem;
	unsigned int bpl_alignment;	/* alignment value */
	unsigned int bpl_zero_padding;	/* whether the alignment is optional */
	unsigned int bpl_max;		/* maximum bytes per line value */
	unsigned int bpl_value;		/* bytes per line value */
	unsigned int bpl_padding;	/* padding at end of line */

	/* Pipeline state */
	struct isp_pipeline pipe;
	struct mutex stream_lock;	/* pipeline and stream states */
	bool error;

	/* Video buffers queue */
	void *alloc_ctx;
	struct vb2_queue *queue;
	struct mutex queue_lock;	/* protects the queue */
	spinlock_t irqlock;		/* protects dmaqueue */
	struct list_head dmaqueue;
	enum isp_video_dmaqueue_flags dmaqueue_flags;

	const struct isp_video_operations *ops;
};

#define to_isp_video(vdev)	container_of(vdev, struct isp_video, video)

struct isp_video_fh {
	struct v4l2_fh vfh;
	struct isp_video *video;
	struct vb2_queue queue;
	struct v4l2_format format;
	struct v4l2_fract timeperframe;
};

#define to_isp_video_fh(fh)	container_of(fh, struct isp_video_fh, vfh)
#define isp_video_queue_to_isp_video_fh(q) \
				container_of(q, struct isp_video_fh, queue)

int omap3isp_video_init(struct isp_video *video, const char *name);
void omap3isp_video_cleanup(struct isp_video *video);
int omap3isp_video_register(struct isp_video *video,
			    struct v4l2_device *vdev);
void omap3isp_video_unregister(struct isp_video *video);
struct isp_buffer *omap3isp_video_buffer_next(struct isp_video *video);
void omap3isp_video_cancel_stream(struct isp_video *video);
void omap3isp_video_resume(struct isp_video *video, int continuous);
struct media_pad *omap3isp_video_remote_pad(struct isp_video *video);

const struct isp_format_info *
omap3isp_video_format_info(enum v4l2_mbus_pixelcode code);

#endif /* OMAP3_ISP_VIDEO_H */
Commit	Line	Data
ad614acb LP	1	/*
	2	* ispvideo.h
	3	*
	4	* TI OMAP3 ISP - Generic video node
	5	*
	6	* Copyright (C) 2009-2010 Nokia Corporation
	7	*
	8	* Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
	9	* Sakari Ailus <sakari.ailus@iki.fi>
	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License version 2 as
	13	* published by the Free Software Foundation.
	14	*
	15	* This program is distributed in the hope that it will be useful, but
	16	* WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	18	* General Public License for more details.
	19	*
	20	* You should have received a copy of the GNU General Public License
	21	* along with this program; if not, write to the Free Software
	22	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
	23	* 02110-1301 USA
	24	*/
	25
	26	#ifndef OMAP3_ISP_VIDEO_H
	27	#define OMAP3_ISP_VIDEO_H
	28
	29	#include <linux/v4l2-mediabus.h>
ad614acb LP	30	#include <media/media-entity.h>
	31	#include <media/v4l2-dev.h>
	32	#include <media/v4l2-fh.h>
fbac1400	33	#include <media/videobuf2-core.h>
ad614acb LP	34
ad614acb LP	35	#define ISP_VIDEO_DRIVER_NAME "ispvideo"
64dc3c1a	36	#define ISP_VIDEO_DRIVER_VERSION "0.0.2"
ad614acb LP	37
	38	struct isp_device;
	39	struct isp_video;
	40	struct v4l2_mbus_framefmt;
	41	struct v4l2_pix_format;
	42
	43	/*
	44	* struct isp_format_info - ISP media bus format information
	45	* @code: V4L2 media bus format code
	46	* @truncated: V4L2 media bus format code for the same format truncated to 10
	47	* bits. Identical to @code if the format is 10 bits wide or less.
	48	* @uncompressed: V4L2 media bus format code for the corresponding uncompressed
	49	* format. Identical to @code if the format is not DPCM compressed.
c09af044 MJ	50	* @flavor: V4L2 media bus format code for the same pixel layout but
c09af044 MJ	51	* shifted to be 8 bits per pixel. =0 if format is not shiftable.
ad614acb	52	* @pixelformat: V4L2 pixel format FCC identifier
1697e49a LP	53	* @width: Bits per pixel (when transferred over a bus)
1697e49a LP	54	* @bpp: Bytes per pixel (when stored in memory)
ad614acb LP	55	*/
	56	struct isp_format_info {
	57	enum v4l2_mbus_pixelcode code;
	58	enum v4l2_mbus_pixelcode truncated;
	59	enum v4l2_mbus_pixelcode uncompressed;
c09af044	60	enum v4l2_mbus_pixelcode flavor;
ad614acb	61	u32 pixelformat;
1697e49a	62	unsigned int width;
ad614acb LP	63	unsigned int bpp;
	64	};
	65
	66	enum isp_pipeline_stream_state {
	67	ISP_PIPELINE_STREAM_STOPPED = 0,
	68	ISP_PIPELINE_STREAM_CONTINUOUS = 1,
	69	ISP_PIPELINE_STREAM_SINGLESHOT = 2,
	70	};
	71
	72	enum isp_pipeline_state {
	73	/* The stream has been started on the input video node. */
	74	ISP_PIPELINE_STREAM_INPUT = 1,
	75	/* The stream has been started on the output video node. */
	76	ISP_PIPELINE_STREAM_OUTPUT = 2,
	77	/* At least one buffer is queued on the input video node. */
	78	ISP_PIPELINE_QUEUE_INPUT = 4,
	79	/* At least one buffer is queued on the output video node. */
	80	ISP_PIPELINE_QUEUE_OUTPUT = 8,
	81	/* The input entity is idle, ready to be started. */
	82	ISP_PIPELINE_IDLE_INPUT = 16,
	83	/* The output entity is idle, ready to be started. */
	84	ISP_PIPELINE_IDLE_OUTPUT = 32,
	85	/* The pipeline is currently streaming. */
	86	ISP_PIPELINE_STREAM = 64,
	87	};
	88
875e2e3e LP	89	/*
	90	* struct isp_pipeline - An ISP hardware pipeline
	91	* @error: A hardware error occurred during capture
1567bb7d	92	* @entities: Bitmask of entities in the pipeline (indexed by entity ID)
875e2e3e	93	*/
ad614acb LP	94	struct isp_pipeline {
	95	struct media_pipeline pipe;
	96	spinlock_t lock; /* Pipeline state and queue flags */
	97	unsigned int state;
	98	enum isp_pipeline_stream_state stream_state;
	99	struct isp_video *input;
	100	struct isp_video *output;
1567bb7d	101	u32 entities;
ad614acb LP	102	unsigned long l3_ick;
	103	unsigned int max_rate;
	104	atomic_t frame_number;
	105	bool do_propagation; /* of frame number */
875e2e3e	106	bool error;
ad614acb	107	struct v4l2_fract max_timeperframe;
80b37e7f SA	108	struct v4l2_subdev *external;
80b37e7f SA	109	unsigned int external_rate;
1697e49a	110	unsigned int external_width;
ad614acb LP	111	};
	112
	113	#define to_isp_pipeline(__e) \
	114	container_of((__e)->pipe, struct isp_pipeline, pipe)
	115
	116	static inline int isp_pipeline_ready(struct isp_pipeline *pipe)
	117	{
	118	return pipe->state == (ISP_PIPELINE_STREAM_INPUT \|
	119	ISP_PIPELINE_STREAM_OUTPUT \|
	120	ISP_PIPELINE_QUEUE_INPUT \|
	121	ISP_PIPELINE_QUEUE_OUTPUT \|
	122	ISP_PIPELINE_IDLE_INPUT \|
	123	ISP_PIPELINE_IDLE_OUTPUT);
	124	}
	125
fbac1400 LP	126	/**
	127	* struct isp_buffer - ISP video buffer
	128	* @vb: videobuf2 buffer
eb2c00d2	129	* @irqlist: List head for insertion into IRQ queue
21d8582d	130	* @dma: DMA address
ad614acb LP	131	*/
ad614acb LP	132	struct isp_buffer {
fbac1400	133	struct vb2_buffer vb;
eb2c00d2	134	struct list_head irqlist;
21d8582d	135	dma_addr_t dma;
ad614acb LP	136	};
ad614acb LP	137
fbac1400	138	#define to_isp_buffer(buf) container_of(buf, struct isp_buffer, vb)
ad614acb LP	139
	140	enum isp_video_dmaqueue_flags {
	141	/* Set if DMA queue becomes empty when ISP_PIPELINE_STREAM_CONTINUOUS */
	142	ISP_VIDEO_DMAQUEUE_UNDERRUN = (1 << 0),
	143	/* Set when queuing buffer to an empty DMA queue */
	144	ISP_VIDEO_DMAQUEUE_QUEUED = (1 << 1),
	145	};
	146
	147	#define isp_video_dmaqueue_flags_clr(video) \
	148	({ (video)->dmaqueue_flags = 0; })
	149
	150	/*
	151	* struct isp_video_operations - ISP video operations
	152	* @queue: Resume streaming when a buffer is queued. Called on VIDIOC_QBUF
	153	* if there was no buffer previously queued.
	154	*/
	155	struct isp_video_operations {
	156	int(queue)(struct isp_video video, struct isp_buffer *buffer);
	157	};
	158
	159	struct isp_video {
	160	struct video_device video;
	161	enum v4l2_buf_type type;
	162	struct media_pad pad;
	163
	164	struct mutex mutex; /* format and crop settings */
	165	atomic_t active;
	166
	167	struct isp_device *isp;
	168
	169	unsigned int capture_mem;
	170	unsigned int bpl_alignment; /* alignment value */
	171	unsigned int bpl_zero_padding; /* whether the alignment is optional */
	172	unsigned int bpl_max; /* maximum bytes per line value */
	173	unsigned int bpl_value; /* bytes per line value */
	174	unsigned int bpl_padding; /* padding at end of line */
	175
ad614acb LP	176	/* Pipeline state */
	177	struct isp_pipeline pipe;
	178	struct mutex stream_lock; /* pipeline and stream states */
661112cb	179	bool error;
ad614acb LP	180
ad614acb LP	181	/* Video buffers queue */
fbac1400 LP	182	void *alloc_ctx;
fbac1400 LP	183	struct vb2_queue *queue;
988d54c4	184	struct mutex queue_lock; /* protects the queue */
e8feb876	185	spinlock_t irqlock; /* protects dmaqueue */
ad614acb LP	186	struct list_head dmaqueue;
	187	enum isp_video_dmaqueue_flags dmaqueue_flags;
	188
	189	const struct isp_video_operations *ops;
	190	};
	191
	192	#define to_isp_video(vdev) container_of(vdev, struct isp_video, video)
	193
	194	struct isp_video_fh {
	195	struct v4l2_fh vfh;
	196	struct isp_video *video;
fbac1400	197	struct vb2_queue queue;
ad614acb LP	198	struct v4l2_format format;
	199	struct v4l2_fract timeperframe;
	200	};
	201
	202	#define to_isp_video_fh(fh) container_of(fh, struct isp_video_fh, vfh)
	203	#define isp_video_queue_to_isp_video_fh(q) \
	204	container_of(q, struct isp_video_fh, queue)
	205
	206	int omap3isp_video_init(struct isp_video video, const char name);
63b4ca23	207	void omap3isp_video_cleanup(struct isp_video *video);
ad614acb LP	208	int omap3isp_video_register(struct isp_video *video,
	209	struct v4l2_device *vdev);
	210	void omap3isp_video_unregister(struct isp_video *video);
875e2e3e	211	struct isp_buffer omap3isp_video_buffer_next(struct isp_video video);
661112cb	212	void omap3isp_video_cancel_stream(struct isp_video *video);
ad614acb LP	213	void omap3isp_video_resume(struct isp_video *video, int continuous);
	214	struct media_pad omap3isp_video_remote_pad(struct isp_video video);
	215
	216	const struct isp_format_info *
	217	omap3isp_video_format_info(enum v4l2_mbus_pixelcode code);
	218
	219	#endif /* OMAP3_ISP_VIDEO_H */