/* * TI OMAP4 ISS V4L2 Driver - Generic video node * * Copyright (C) 2012 Texas Instruments, Inc. * * Author: Sergio Aguirre * * 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 #include #include #include #include #include #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_buffer vb; struct list_head list; dma_addr_t iss_addr; }; #define to_iss_buffer(buf) container_of(buf, struct iss_buffer, buffer) 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 */