| /* |
| * TI OMAP4 ISS V4L2 Driver - Generic video node |
| * |
| * Copyright (C) 2012 Texas Instruments, Inc. |
| * |
| * Author: Sergio Aguirre <sergio.a.aguirre@gmail.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| */ |
| |
| #ifndef OMAP4_ISS_VIDEO_H |
| #define OMAP4_ISS_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-v4l2.h> |
| #include <media/videobuf2-dma-contig.h> |
| |
| #define ISS_VIDEO_DRIVER_NAME "issvideo" |
| #define ISS_VIDEO_DRIVER_VERSION "0.0.2" |
| |
| struct iss_device; |
| struct iss_video; |
| struct v4l2_mbus_framefmt; |
| struct v4l2_pix_format; |
| |
| /* |
| * struct iss_format_info - ISS 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 |
| * @bpp: Bits per pixel |
| * @description: Human-readable format description |
| */ |
| struct iss_format_info { |
| u32 code; |
| u32 truncated; |
| u32 uncompressed; |
| u32 flavor; |
| u32 pixelformat; |
| unsigned int bpp; |
| const char *description; |
| }; |
| |
| enum iss_pipeline_stream_state { |
| ISS_PIPELINE_STREAM_STOPPED = 0, |
| ISS_PIPELINE_STREAM_CONTINUOUS = 1, |
| ISS_PIPELINE_STREAM_SINGLESHOT = 2, |
| }; |
| |
| enum iss_pipeline_state { |
| /* The stream has been started on the input video node. */ |
| ISS_PIPELINE_STREAM_INPUT = 1, |
| /* The stream has been started on the output video node. */ |
| ISS_PIPELINE_STREAM_OUTPUT = (1 << 1), |
| /* At least one buffer is queued on the input video node. */ |
| ISS_PIPELINE_QUEUE_INPUT = (1 << 2), |
| /* At least one buffer is queued on the output video node. */ |
| ISS_PIPELINE_QUEUE_OUTPUT = (1 << 3), |
| /* The input entity is idle, ready to be started. */ |
| ISS_PIPELINE_IDLE_INPUT = (1 << 4), |
| /* The output entity is idle, ready to be started. */ |
| ISS_PIPELINE_IDLE_OUTPUT = (1 << 5), |
| /* The pipeline is currently streaming. */ |
| ISS_PIPELINE_STREAM = (1 << 6), |
| }; |
| |
| /* |
| * struct iss_pipeline - An OMAP4 ISS hardware pipeline |
| * @entities: Bitmask of entities in the pipeline (indexed by entity ID) |
| * @error: A hardware error occurred during capture |
| */ |
| struct iss_pipeline { |
| struct media_pipeline pipe; |
| spinlock_t lock; /* Pipeline state and queue flags */ |
| unsigned int state; |
| enum iss_pipeline_stream_state stream_state; |
| struct iss_video *input; |
| struct iss_video *output; |
| unsigned int entities; |
| 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; |
| int external_bpp; |
| }; |
| |
| #define to_iss_pipeline(__e) \ |
| container_of((__e)->pipe, struct iss_pipeline, pipe) |
| |
| static inline int iss_pipeline_ready(struct iss_pipeline *pipe) |
| { |
| return pipe->state == (ISS_PIPELINE_STREAM_INPUT | |
| ISS_PIPELINE_STREAM_OUTPUT | |
| ISS_PIPELINE_QUEUE_INPUT | |
| ISS_PIPELINE_QUEUE_OUTPUT | |
| ISS_PIPELINE_IDLE_INPUT | |
| ISS_PIPELINE_IDLE_OUTPUT); |
| } |
| |
| /* |
| * struct iss_buffer - ISS buffer |
| * @buffer: ISS video buffer |
| * @iss_addr: Physical address of the buffer. |
| */ |
| struct iss_buffer { |
| /* common v4l buffer stuff -- must be first */ |
| struct vb2_v4l2_buffer vb; |
| struct list_head list; |
| dma_addr_t iss_addr; |
| }; |
| |
| #define to_iss_buffer(buf) container_of(buf, struct iss_buffer, vb) |
| |
| enum iss_video_dmaqueue_flags { |
| /* Set if DMA queue becomes empty when ISS_PIPELINE_STREAM_CONTINUOUS */ |
| ISS_VIDEO_DMAQUEUE_UNDERRUN = (1 << 0), |
| /* Set when queuing buffer to an empty DMA queue */ |
| ISS_VIDEO_DMAQUEUE_QUEUED = (1 << 1), |
| }; |
| |
| #define iss_video_dmaqueue_flags_clr(video) \ |
| ({ (video)->dmaqueue_flags = 0; }) |
| |
| /* |
| * struct iss_video_operations - ISS video operations |
| * @queue: Resume streaming when a buffer is queued. Called on VIDIOC_QBUF |
| * if there was no buffer previously queued. |
| */ |
| struct iss_video_operations { |
| int (*queue)(struct iss_video *video, struct iss_buffer *buffer); |
| }; |
| |
| struct iss_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 iss_device *iss; |
| |
| 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 iss_pipeline pipe; |
| struct mutex stream_lock; /* pipeline and stream states */ |
| bool error; |
| |
| /* Video buffers queue */ |
| struct vb2_queue *queue; |
| spinlock_t qlock; /* protects dmaqueue and error */ |
| struct list_head dmaqueue; |
| enum iss_video_dmaqueue_flags dmaqueue_flags; |
| struct vb2_alloc_ctx *alloc_ctx; |
| |
| const struct iss_video_operations *ops; |
| }; |
| |
| #define to_iss_video(vdev) container_of(vdev, struct iss_video, video) |
| |
| struct iss_video_fh { |
| struct v4l2_fh vfh; |
| struct iss_video *video; |
| struct vb2_queue queue; |
| struct v4l2_format format; |
| struct v4l2_fract timeperframe; |
| }; |
| |
| #define to_iss_video_fh(fh) container_of(fh, struct iss_video_fh, vfh) |
| #define iss_video_queue_to_iss_video_fh(q) \ |
| container_of(q, struct iss_video_fh, queue) |
| |
| int omap4iss_video_init(struct iss_video *video, const char *name); |
| void omap4iss_video_cleanup(struct iss_video *video); |
| int omap4iss_video_register(struct iss_video *video, |
| struct v4l2_device *vdev); |
| void omap4iss_video_unregister(struct iss_video *video); |
| struct iss_buffer *omap4iss_video_buffer_next(struct iss_video *video); |
| void omap4iss_video_cancel_stream(struct iss_video *video); |
| struct media_pad *omap4iss_video_remote_pad(struct iss_video *video); |
| |
| const struct iss_format_info * |
| omap4iss_video_format_info(u32 code); |
| |
| #endif /* OMAP4_ISS_VIDEO_H */ |