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 <media/media-entity.h>
  31 #include <media/v4l2-dev.h>
  32 #include <media/v4l2-fh.h>
  33
  34 #include "ispqueue.h"
  35
  36 #define ISP_VIDEO_DRIVER_NAME           "ispvideo"
  37 #define ISP_VIDEO_DRIVER_VERSION        "0.0.2"
  38
  39 struct isp_device;
  40 struct isp_video;
  41 struct v4l2_mbus_framefmt;
  42 struct v4l2_pix_format;
  43
  44 /*
  45  * struct isp_format_info - ISP media bus format information
  46  * @code: V4L2 media bus format code
  47  * @truncated: V4L2 media bus format code for the same format truncated to 10
  48  *      bits. Identical to @code if the format is 10 bits wide or less.
  49  * @uncompressed: V4L2 media bus format code for the corresponding uncompressed
  50  *      format. Identical to @code if the format is not DPCM compressed.
  51  * @flavor: V4L2 media bus format code for the same pixel layout but
  52  *      shifted to be 8 bits per pixel. =0 if format is not shiftable.
  53  * @pixelformat: V4L2 pixel format FCC identifier
  54  * @bpp: Bits per pixel
  55  */
  56 struct isp_format_info {
  57         enum v4l2_mbus_pixelcode code;
  58         enum v4l2_mbus_pixelcode truncated;
  59         enum v4l2_mbus_pixelcode uncompressed;
  60         enum v4l2_mbus_pixelcode flavor;
  61         u32 pixelformat;
  62         unsigned int bpp;
  63 };
  64
  65 enum isp_pipeline_stream_state {
  66         ISP_PIPELINE_STREAM_STOPPED = 0,
  67         ISP_PIPELINE_STREAM_CONTINUOUS = 1,
  68         ISP_PIPELINE_STREAM_SINGLESHOT = 2,
  69 };
  70
  71 enum isp_pipeline_state {
  72         /* The stream has been started on the input video node. */
  73         ISP_PIPELINE_STREAM_INPUT = 1,
  74         /* The stream has been started on the output video node. */
  75         ISP_PIPELINE_STREAM_OUTPUT = 2,
  76         /* At least one buffer is queued on the input video node. */
  77         ISP_PIPELINE_QUEUE_INPUT = 4,
  78         /* At least one buffer is queued on the output video node. */
  79         ISP_PIPELINE_QUEUE_OUTPUT = 8,
  80         /* The input entity is idle, ready to be started. */
  81         ISP_PIPELINE_IDLE_INPUT = 16,
  82         /* The output entity is idle, ready to be started. */
  83         ISP_PIPELINE_IDLE_OUTPUT = 32,
  84         /* The pipeline is currently streaming. */
  85         ISP_PIPELINE_STREAM = 64,
  86 };
  87
  88 /*
  89  * struct isp_pipeline - An ISP hardware pipeline
  90  * @error: A hardware error occurred during capture
  91  * @entities: Bitmask of entities in the pipeline (indexed by entity ID)
  92  */
  93 struct isp_pipeline {
  94         struct media_pipeline pipe;
  95         spinlock_t lock;                /* Pipeline state and queue flags */
  96         unsigned int state;
  97         enum isp_pipeline_stream_state stream_state;
  98         struct isp_video *input;
  99         struct isp_video *output;
 100         u32 entities;
 101         unsigned long l3_ick;
 102         unsigned int max_rate;
 103         atomic_t frame_number;
 104         bool do_propagation; /* of frame number */
 105         bool error;
 106         struct v4l2_fract max_timeperframe;
 107 };
 108
 109 #define to_isp_pipeline(__e) \
 110         container_of((__e)->pipe, struct isp_pipeline, pipe)
 111
 112 static inline int isp_pipeline_ready(struct isp_pipeline *pipe)
 113 {
 114         return pipe->state == (ISP_PIPELINE_STREAM_INPUT |
 115                                ISP_PIPELINE_STREAM_OUTPUT |
 116                                ISP_PIPELINE_QUEUE_INPUT |
 117                                ISP_PIPELINE_QUEUE_OUTPUT |
 118                                ISP_PIPELINE_IDLE_INPUT |
 119                                ISP_PIPELINE_IDLE_OUTPUT);
 120 }
 121
 122 /*
 123  * struct isp_buffer - ISP buffer
 124  * @buffer: ISP video buffer
 125  * @isp_addr: MMU mapped address (a.k.a. device address) of the buffer.
 126  */
 127 struct isp_buffer {
 128         struct isp_video_buffer buffer;
 129         dma_addr_t isp_addr;
 130 };
 131
 132 #define to_isp_buffer(buf)      container_of(buf, struct isp_buffer, buffer)
 133
 134 enum isp_video_dmaqueue_flags {
 135         /* Set if DMA queue becomes empty when ISP_PIPELINE_STREAM_CONTINUOUS */
 136         ISP_VIDEO_DMAQUEUE_UNDERRUN = (1 << 0),
 137         /* Set when queuing buffer to an empty DMA queue */
 138         ISP_VIDEO_DMAQUEUE_QUEUED = (1 << 1),
 139 };
 140
 141 #define isp_video_dmaqueue_flags_clr(video)     \
 142                         ({ (video)->dmaqueue_flags = 0; })
 143
 144 /*
 145  * struct isp_video_operations - ISP video operations
 146  * @queue:      Resume streaming when a buffer is queued. Called on VIDIOC_QBUF
 147  *              if there was no buffer previously queued.
 148  */
 149 struct isp_video_operations {
 150         int(*queue)(struct isp_video *video, struct isp_buffer *buffer);
 151 };
 152
 153 struct isp_video {
 154         struct video_device video;
 155         enum v4l2_buf_type type;
 156         struct media_pad pad;
 157
 158         struct mutex mutex;             /* format and crop settings */
 159         atomic_t active;
 160
 161         struct isp_device *isp;
 162
 163         unsigned int capture_mem;
 164         unsigned int bpl_alignment;     /* alignment value */
 165         unsigned int bpl_zero_padding;  /* whether the alignment is optional */
 166         unsigned int bpl_max;           /* maximum bytes per line value */
 167         unsigned int bpl_value;         /* bytes per line value */
 168         unsigned int bpl_padding;       /* padding at end of line */
 169
 170         /* Entity video node streaming */
 171         unsigned int streaming:1;
 172
 173         /* Pipeline state */
 174         struct isp_pipeline pipe;
 175         struct mutex stream_lock;       /* pipeline and stream states */
 176
 177         /* Video buffers queue */
 178         struct isp_video_queue *queue;
 179         struct list_head dmaqueue;
 180         enum isp_video_dmaqueue_flags dmaqueue_flags;
 181
 182         const struct isp_video_operations *ops;
 183 };
 184
 185 #define to_isp_video(vdev)      container_of(vdev, struct isp_video, video)
 186
 187 struct isp_video_fh {
 188         struct v4l2_fh vfh;
 189         struct isp_video *video;
 190         struct isp_video_queue queue;
 191         struct v4l2_format format;
 192         struct v4l2_fract timeperframe;
 193 };
 194
 195 #define to_isp_video_fh(fh)     container_of(fh, struct isp_video_fh, vfh)
 196 #define isp_video_queue_to_isp_video_fh(q) \
 197                                 container_of(q, struct isp_video_fh, queue)
 198
 199 int omap3isp_video_init(struct isp_video *video, const char *name);
 200 void omap3isp_video_cleanup(struct isp_video *video);
 201 int omap3isp_video_register(struct isp_video *video,
 202                             struct v4l2_device *vdev);
 203 void omap3isp_video_unregister(struct isp_video *video);
 204 struct isp_buffer *omap3isp_video_buffer_next(struct isp_video *video);
 205 void omap3isp_video_resume(struct isp_video *video, int continuous);
 206 struct media_pad *omap3isp_video_remote_pad(struct isp_video *video);
 207
 208 const struct isp_format_info *
 209 omap3isp_video_format_info(enum v4l2_mbus_pixelcode code);
 210
 211 #endif /* OMAP3_ISP_VIDEO_H */