drivers/media/video/s5p-jpeg/jpeg-core.h

   1 /* linux/drivers/media/video/s5p-jpeg/jpeg-core.h
   2  *
   3  * Copyright (c) 2011 Samsung Electronics Co., Ltd.
   4  *              http://www.samsung.com
   5  *
   6  * Author: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #ifndef JPEG_CORE_H_
  14 #define JPEG_CORE_H_
  15
  16 #include <media/v4l2-device.h>
  17 #include <media/v4l2-fh.h>
  18 #include <media/v4l2-ctrls.h>
  19
  20 #define S5P_JPEG_M2M_NAME               "s5p-jpeg"
  21
  22 /* JPEG compression quality setting */
  23 #define S5P_JPEG_COMPR_QUAL_BEST        0
  24 #define S5P_JPEG_COMPR_QUAL_WORST       3
  25
  26 /* JPEG RGB to YCbCr conversion matrix coefficients */
  27 #define S5P_JPEG_COEF11                 0x4d
  28 #define S5P_JPEG_COEF12                 0x97
  29 #define S5P_JPEG_COEF13                 0x1e
  30 #define S5P_JPEG_COEF21                 0x2c
  31 #define S5P_JPEG_COEF22                 0x57
  32 #define S5P_JPEG_COEF23                 0x83
  33 #define S5P_JPEG_COEF31                 0x83
  34 #define S5P_JPEG_COEF32                 0x6e
  35 #define S5P_JPEG_COEF33                 0x13
  36
  37 /* a selection of JPEG markers */
  38 #define TEM                             0x01
  39 #define SOF0                            0xc0
  40 #define RST                             0xd0
  41 #define SOI                             0xd8
  42 #define EOI                             0xd9
  43 #define DHP                             0xde
  44
  45 /* Flags that indicate a format can be used for capture/output */
  46 #define MEM2MEM_CAPTURE                 (1 << 0)
  47 #define MEM2MEM_OUTPUT                  (1 << 1)
  48
  49 /**
  50  * struct s5p_jpeg - JPEG IP abstraction
  51  * @lock:               the mutex protecting this structure
  52  * @slock:              spinlock protecting the device contexts
  53  * @v4l2_dev:           v4l2 device for mem2mem mode
  54  * @vfd_encoder:        video device node for encoder mem2mem mode
  55  * @vfd_decoder:        video device node for decoder mem2mem mode
  56  * @m2m_dev:            v4l2 mem2mem device data
  57  * @regs:               JPEG IP registers mapping
  58  * @irq:                JPEG IP irq
  59  * @clk:                JPEG IP clock
  60  * @dev:                JPEG IP struct device
  61  * @alloc_ctx:          videobuf2 memory allocator's context
  62  */
  63 struct s5p_jpeg {
  64         struct mutex            lock;
  65         struct spinlock         slock;
  66
  67         struct v4l2_device      v4l2_dev;
  68         struct video_device     *vfd_encoder;
  69         struct video_device     *vfd_decoder;
  70         struct v4l2_m2m_dev     *m2m_dev;
  71
  72         void __iomem            *regs;
  73         unsigned int            irq;
  74         struct clk              *clk;
  75         struct device           *dev;
  76         void                    *alloc_ctx;
  77 };
  78
  79 /**
  80  * struct jpeg_fmt - driver's internal color format data
  81  * @name:       format descritpion
  82  * @fourcc:     the fourcc code, 0 if not applicable
  83  * @depth:      number of bits per pixel
  84  * @colplanes:  number of color planes (1 for packed formats)
  85  * @h_align:    horizontal alignment order (align to 2^h_align)
  86  * @v_align:    vertical alignment order (align to 2^v_align)
  87  * @types:      types of queue this format is applicable to
  88  */
  89 struct s5p_jpeg_fmt {
  90         char    *name;
  91         u32     fourcc;
  92         int     depth;
  93         int     colplanes;
  94         int     h_align;
  95         int     v_align;
  96         u32     types;
  97 };
  98
  99 /**
 100  * s5p_jpeg_q_data - parameters of one queue
 101  * @fmt:        driver-specific format of this queue
 102  * @w:          image width
 103  * @h:          image height
 104  * @size:       image buffer size in bytes
 105  */
 106 struct s5p_jpeg_q_data {
 107         struct s5p_jpeg_fmt     *fmt;
 108         u32                     w;
 109         u32                     h;
 110         u32                     size;
 111 };
 112
 113 /**
 114  * s5p_jpeg_ctx - the device context data
 115  * @jpeg:               JPEG IP device for this context
 116  * @mode:               compression (encode) operation or decompression (decode)
 117  * @compr_quality:      destination image quality in compression (encode) mode
 118  * @m2m_ctx:            mem2mem device context
 119  * @out_q:              source (output) queue information
 120  * @cap_fmt:            destination (capture) queue queue information
 121  * @hdr_parsed:         set if header has been parsed during decompression
 122  * @ctrl_handler:       controls handler
 123  */
 124 struct s5p_jpeg_ctx {
 125         struct s5p_jpeg         *jpeg;
 126         unsigned int            mode;
 127         unsigned short          compr_quality;
 128         unsigned short          restart_interval;
 129         unsigned short          subsampling;
 130         struct v4l2_m2m_ctx     *m2m_ctx;
 131         struct s5p_jpeg_q_data  out_q;
 132         struct s5p_jpeg_q_data  cap_q;
 133         struct v4l2_fh          fh;
 134         bool                    hdr_parsed;
 135         struct v4l2_ctrl_handler ctrl_handler;
 136 };
 137
 138 /**
 139  * s5p_jpeg_buffer - description of memory containing input JPEG data
 140  * @size:       buffer size
 141  * @curr:       current position in the buffer
 142  * @data:       pointer to the data
 143  */
 144 struct s5p_jpeg_buffer {
 145         unsigned long size;
 146         unsigned long curr;
 147         unsigned long data;
 148 };
 149
 150 #endif /* JPEG_CORE_H */