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