1 /* linux/drivers/media/platform/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 spinlock_t 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 */ 151