drivers/media/video/omap3isp/ispvideo.h

   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>
  30 #include <linux/version.h>
  31 #include <media/media-entity.h>
  32 #include <media/v4l2-dev.h>
  33 #include <media/v4l2-fh.h>
  34
  35 #include "ispqueue.h"
  36
  37 #define ISP_VIDEO_DRIVER_NAME           "ispvideo"
  38 #define ISP_VIDEO_DRIVER_VERSION        KERNEL_VERSION(0, 0, 1)
  39
  40 struct isp_device;
  41 struct isp_video;
  42 struct v4l2_mbus_framefmt;
  43 struct v4l2_pix_format;
  44
  45 /*
  46  * struct isp_format_info - ISP media bus format information
  47  * @code: V4L2 media bus format code
  48  * @truncated: V4L2 media bus format code for the same format truncated to 10
  49  *      bits. Identical to @code if the format is 10 bits wide or less.
  50  * @uncompressed: V4L2 media bus format code for the corresponding uncompressed
  51  *      format. Identical to @code if the format is not DPCM compressed.
  52  * @pixelformat: V4L2 pixel format FCC identifier
  53  * @bpp: Bits per pixel
  54  */
  55 struct isp_format_info {
  56         enum v4l2_mbus_pixelcode code;
  57         enum v4l2_mbus_pixelcode truncated;
  58         enum v4l2_mbus_pixelcode uncompressed;
  59         u32 pixelformat;
  60         unsigned int bpp;
  61 };
  62
  63 enum isp_pipeline_stream_state {
  64         ISP_PIPELINE_STREAM_STOPPED = 0,
  65         ISP_PIPELINE_STREAM_CONTINUOUS = 1,
  66         ISP_PIPELINE_STREAM_SINGLESHOT = 2,
  67 };
  68
  69 enum isp_pipeline_state {
  70         /* The stream has been started on the input video node. */
  71         ISP_PIPELINE_STREAM_INPUT = 1,
  72         /* The stream has been started on the output video node. */
  73         ISP_PIPELINE_STREAM_OUTPUT = 2,
  74         /* At least one buffer is queued on the input video node. */
  75         ISP_PIPELINE_QUEUE_INPUT = 4,
  76         /* At least one buffer is queued on the output video node. */
  77         ISP_PIPELINE_QUEUE_OUTPUT = 8,
  78         /* The input entity is idle, ready to be started. */
  79         ISP_PIPELINE_IDLE_INPUT = 16,
  80         /* The output entity is idle, ready to be started. */
  81         ISP_PIPELINE_IDLE_OUTPUT = 32,
  82         /* The pipeline is currently streaming. */
  83         ISP_PIPELINE_STREAM = 64,
  84 };
  85
  86 struct isp_pipeline {
  87         struct media_pipeline pipe;
  88         spinlock_t lock;                /* Pipeline state and queue flags */
  89         unsigned int state;
  90         enum isp_pipeline_stream_state stream_state;
  91         struct isp_video *input;
  92         struct isp_video *output;
  93         unsigned long l3_ick;
  94         unsigned int max_rate;
  95         atomic_t frame_number;
  96         bool do_propagation; /* of frame number */
  97         struct v4l2_fract max_timeperframe;
  98 };
  99
 100 #define to_isp_pipeline(__e) \
 101         container_of((__e)->pipe, struct isp_pipeline, pipe)
 102
 103 static inline int isp_pipeline_ready(struct isp_pipeline *pipe)
 104 {
 105         return pipe->state == (ISP_PIPELINE_STREAM_INPUT |
 106                                ISP_PIPELINE_STREAM_OUTPUT |
 107                                ISP_PIPELINE_QUEUE_INPUT |
 108                                ISP_PIPELINE_QUEUE_OUTPUT |
 109                                ISP_PIPELINE_IDLE_INPUT |
 110                                ISP_PIPELINE_IDLE_OUTPUT);
 111 }
 112
 113 /*
 114  * struct isp_buffer - ISP buffer
 115  * @buffer: ISP video buffer
 116  * @isp_addr: MMU mapped address (a.k.a. device address) of the buffer.
 117  */
 118 struct isp_buffer {
 119         struct isp_video_buffer buffer;
 120         dma_addr_t isp_addr;
 121 };
 122
 123 #define to_isp_buffer(buf)      container_of(buf, struct isp_buffer, buffer)
 124
 125 enum isp_video_dmaqueue_flags {
 126         /* Set if DMA queue becomes empty when ISP_PIPELINE_STREAM_CONTINUOUS */
 127         ISP_VIDEO_DMAQUEUE_UNDERRUN = (1 << 0),
 128         /* Set when queuing buffer to an empty DMA queue */
 129         ISP_VIDEO_DMAQUEUE_QUEUED = (1 << 1),
 130 };
 131
 132 #define isp_video_dmaqueue_flags_clr(video)     \
 133                         ({ (video)->dmaqueue_flags = 0; })
 134
 135 /*
 136  * struct isp_video_operations - ISP video operations
 137  * @queue:      Resume streaming when a buffer is queued. Called on VIDIOC_QBUF
 138  *              if there was no buffer previously queued.
 139  */
 140 struct isp_video_operations {
 141         int(*queue)(struct isp_video *video, struct isp_buffer *buffer);
 142 };
 143
 144 struct isp_video {
 145         struct video_device video;
 146         enum v4l2_buf_type type;
 147         struct media_pad pad;
 148
 149         struct mutex mutex;             /* format and crop settings */
 150         atomic_t active;
 151
 152         struct isp_device *isp;
 153
 154         unsigned int capture_mem;
 155         unsigned int bpl_alignment;     /* alignment value */
 156         unsigned int bpl_zero_padding;  /* whether the alignment is optional */
 157         unsigned int bpl_max;           /* maximum bytes per line value */
 158         unsigned int bpl_value;         /* bytes per line value */
 159         unsigned int bpl_padding;       /* padding at end of line */
 160
 161         /* Entity video node streaming */
 162         unsigned int streaming:1;
 163
 164         /* Pipeline state */
 165         struct isp_pipeline pipe;
 166         struct mutex stream_lock;       /* pipeline and stream states */
 167
 168         /* Video buffers queue */
 169         struct isp_video_queue *queue;
 170         struct list_head dmaqueue;
 171         enum isp_video_dmaqueue_flags dmaqueue_flags;
 172
 173         const struct isp_video_operations *ops;
 174 };
 175
 176 #define to_isp_video(vdev)      container_of(vdev, struct isp_video, video)
 177
 178 struct isp_video_fh {
 179         struct v4l2_fh vfh;
 180         struct isp_video *video;
 181         struct isp_video_queue queue;
 182         struct v4l2_format format;
 183         struct v4l2_fract timeperframe;
 184 };
 185
 186 #define to_isp_video_fh(fh)     container_of(fh, struct isp_video_fh, vfh)
 187 #define isp_video_queue_to_isp_video_fh(q) \
 188                                 container_of(q, struct isp_video_fh, queue)
 189
 190 int omap3isp_video_init(struct isp_video *video, const char *name);
 191 int omap3isp_video_register(struct isp_video *video,
 192                             struct v4l2_device *vdev);
 193 void omap3isp_video_unregister(struct isp_video *video);
 194 struct isp_buffer *omap3isp_video_buffer_next(struct isp_video *video,
 195                                               unsigned int error);
 196 void omap3isp_video_resume(struct isp_video *video, int continuous);
 197 struct media_pad *omap3isp_video_remote_pad(struct isp_video *video);
 198
 199 const struct isp_format_info *
 200 omap3isp_video_format_info(enum v4l2_mbus_pixelcode code);
 201
 202 #endif /* OMAP3_ISP_VIDEO_H */