Linux内核的framebuffer相关的内核代码注释
来源：互联网 发布：淘宝视频如何上传 编辑：程序博客网 时间：2024/05/24 02:38
由于现在正在进行framebuffer的一个项目开发，所以需要学习framebuffer的内核代码，今天现在这里上传我的相关注释，后面再将我的学习内容和相关framebuffer的操作提交上来．
位置：源代码根目录/include/linux/fb.h
#ifndef _LINUX_FB_H#define _LINUX_FB_H#include <linux/types.h>#include <linux/i2c.h>struct dentry;/* Definitions of frame buffers frame buffer的定义 */#define FB_MAX 32 /* sufficient for now 对于现在来说足够了 *//* ioctls 0x46 is 'F' */#define FBIOGET_VSCREENINFO 0x4600#define FBIOPUT_VSCREENINFO 0x4601#define FBIOGET_FSCREENINFO 0x4602#define FBIOGETCMAP 0x4604#define FBIOPUTCMAP 0x4605#define FBIOPAN_DISPLAY 0x4606#ifdef __KERNEL__#define FBIO_CURSOR _IOWR('F', 0x08, struct fb_cursor_user)#else#define FBIO_CURSOR _IOWR('F', 0x08, struct fb_cursor)#endif/* 0x4607-0x460B are defined below *//* #define FBIOGET_MONITORSPEC 0x460C *//* #define FBIOPUT_MONITORSPEC 0x460D *//* #define FBIOSWITCH_MONIBIT 0x460E */#define FBIOGET_CON2FBMAP 0x460F#define FBIOPUT_CON2FBMAP 0x4610#define FBIOBLANK 0x4611 /* arg: 0 or vesa level + 1 */#define FBIOGET_VBLANK _IOR('F', 0x12, struct fb_vblank)#define FBIO_ALLOC 0x4613#define FBIO_FREE 0x4614#define FBIOGET_GLYPH 0x4615#define FBIOGET_HWCINFO 0x4616#define FBIOPUT_MODEINFO 0x4617#define FBIOGET_DISPINFO 0x4618#define FB_TYPE_PACKED_PIXELS 0 /* Packed Pixels 填充的像素 */#define FB_TYPE_PLANES 1 /* Non interleaved planes 非交错平面 */#define FB_TYPE_INTERLEAVED_PLANES 2 /* Interleaved planes 交错的平面 */#define FB_TYPE_TEXT 3 /* Text/attributes 文本/属性 */#define FB_TYPE_VGA_PLANES 4 /* EGA/VGA planes EGA/VGA 平面 */#define FB_AUX_TEXT_MDA 0 /* Monochrome text 单色文本 */#define FB_AUX_TEXT_CGA 1 /* CGA/EGA/VGA Color text CGA/EGA/VGA色彩文本 */#define FB_AUX_TEXT_S3_MMIO 2 /* S3 MMIO fasttext */#define FB_AUX_TEXT_MGA_STEP16 3 /* MGA Millenium I: text, attr, 14 reserved bytes */#define FB_AUX_TEXT_MGA_STEP8 4 /* other MGAs: text, attr, 6 reserved bytes */#define FB_AUX_TEXT_SVGA_GROUP 8 /* 8-15: SVGA tileblit compatible modes */#define FB_AUX_TEXT_SVGA_MASK 7 /* lower three bits says step */#define FB_AUX_TEXT_SVGA_STEP2 8 /* SVGA text mode: text, attr */#define FB_AUX_TEXT_SVGA_STEP4 9 /* SVGA text mode: text, attr, 2 reserved bytes */#define FB_AUX_TEXT_SVGA_STEP8 10 /* SVGA text mode: text, attr, 6 reserved bytes */#define FB_AUX_TEXT_SVGA_STEP16 11 /* SVGA text mode: text, attr, 14 reserved bytes */#define FB_AUX_TEXT_SVGA_LAST 15 /* reserved up to 15 */#define FB_AUX_VGA_PLANES_VGA4 0 /* 16 color planes (EGA/VGA) */#define FB_AUX_VGA_PLANES_CFB4 1 /* CFB4 in planes (VGA) */#define FB_AUX_VGA_PLANES_CFB8 2 /* CFB8 in planes (VGA) */#define FB_VISUAL_MONO01 0 /* Monochr. 1=Black 0=White 1=黑色，２＝白色*/#define FB_VISUAL_MONO10 1 /* Monochr. 1=White 0=Black 1=白色，２＝黑色*/#define FB_VISUAL_TRUECOLOR 2 /* True color 真实的颜色 */#define FB_VISUAL_PSEUDOCOLOR 3 /* Pseudo color (like atari) 伪颜色*/#define FB_VISUAL_DIRECTCOLOR 4 /* Direct color 直接颜色 */#define FB_VISUAL_STATIC_PSEUDOCOLOR 5 /* Pseudo color readonly 只读伪颜色*/#define FB_ACCEL_NONE 0 /* no hardware accelerator 没有硬件加速 */#define FB_ACCEL_ATARIBLITT 1 /* Atari Blitter */#define FB_ACCEL_AMIGABLITT 2 /* Amiga Blitter */#define FB_ACCEL_S3_TRIO64 3 /* Cybervision64 (S3 Trio64) */#define FB_ACCEL_NCR_77C32BLT 4 /* RetinaZ3 (NCR 77C32BLT) */#define FB_ACCEL_S3_VIRGE 5 /* Cybervision64/3D (S3 ViRGE) */#define FB_ACCEL_ATI_MACH64GX 6 /* ATI Mach 64GX family */#define FB_ACCEL_DEC_TGA 7 /* DEC 21030 TGA */#define FB_ACCEL_ATI_MACH64CT 8 /* ATI Mach 64CT family */#define FB_ACCEL_ATI_MACH64VT 9 /* ATI Mach 64CT family VT class */#define FB_ACCEL_ATI_MACH64GT 10 /* ATI Mach 64CT family GT class */#define FB_ACCEL_SUN_CREATOR 11 /* Sun Creator/Creator3D */#define FB_ACCEL_SUN_CGSIX 12 /* Sun cg6 */#define FB_ACCEL_SUN_LEO 13 /* Sun leo/zx */#define FB_ACCEL_IMS_TWINTURBO 14 /* IMS Twin Turbo */#define FB_ACCEL_3DLABS_PERMEDIA2 15 /* 3Dlabs Permedia 2 */#define FB_ACCEL_MATROX_MGA2064W 16 /* Matrox MGA2064W (Millenium) */#define FB_ACCEL_MATROX_MGA1064SG 17 /* Matrox MGA1064SG (Mystique) */#define FB_ACCEL_MATROX_MGA2164W 18 /* Matrox MGA2164W (Millenium II) */#define FB_ACCEL_MATROX_MGA2164W_AGP 19 /* Matrox MGA2164W (Millenium II) */#define FB_ACCEL_MATROX_MGAG100 20 /* Matrox G100 (Productiva G100) */#define FB_ACCEL_MATROX_MGAG200 21 /* Matrox G200 (Myst, Mill, ...) */#define FB_ACCEL_SUN_CG14 22 /* Sun cgfourteen */#define FB_ACCEL_SUN_BWTWO 23 /* Sun bwtwo */#define FB_ACCEL_SUN_CGTHREE 24 /* Sun cgthree */#define FB_ACCEL_SUN_TCX 25 /* Sun tcx */#define FB_ACCEL_MATROX_MGAG400 26 /* Matrox G400 */#define FB_ACCEL_NV3 27 /* nVidia RIVA 128 */#define FB_ACCEL_NV4 28 /* nVidia RIVA TNT */#define FB_ACCEL_NV5 29 /* nVidia RIVA TNT2 */#define FB_ACCEL_CT_6555x 30 /* C&T 6555x */#define FB_ACCEL_3DFX_BANSHEE 31 /* 3Dfx Banshee */#define FB_ACCEL_ATI_RAGE128 32 /* ATI Rage128 family */#define FB_ACCEL_IGS_CYBER2000 33 /* CyberPro 2000 */#define FB_ACCEL_IGS_CYBER2010 34 /* CyberPro 2010 */#define FB_ACCEL_IGS_CYBER5000 35 /* CyberPro 5000 */#define FB_ACCEL_SIS_GLAMOUR 36 /* SiS 300/630/540 */#define FB_ACCEL_3DLABS_PERMEDIA3 37 /* 3Dlabs Permedia 3 */#define FB_ACCEL_ATI_RADEON 38 /* ATI Radeon family */#define FB_ACCEL_I810 39 /* Intel 810/815 */#define FB_ACCEL_SIS_GLAMOUR_2 40 /* SiS 315, 650, 740 */#define FB_ACCEL_SIS_XABRE 41 /* SiS 330 ("Xabre") */#define FB_ACCEL_I830 42 /* Intel 830M/845G/85x/865G */#define FB_ACCEL_NV_10 43 /* nVidia Arch 10 */#define FB_ACCEL_NV_20 44 /* nVidia Arch 20 */#define FB_ACCEL_NV_30 45 /* nVidia Arch 30 */#define FB_ACCEL_NV_40 46 /* nVidia Arch 40 */#define FB_ACCEL_XGI_VOLARI_V 47 /* XGI Volari V3XT, V5, V8 */#define FB_ACCEL_XGI_VOLARI_Z 48 /* XGI Volari Z7 */#define FB_ACCEL_OMAP1610 49 /* TI OMAP16xx */#define FB_ACCEL_TRIDENT_TGUI 50 /* Trident TGUI */#define FB_ACCEL_TRIDENT_3DIMAGE 51 /* Trident 3DImage */#define FB_ACCEL_TRIDENT_BLADE3D 52 /* Trident Blade3D */#define FB_ACCEL_TRIDENT_BLADEXP 53 /* Trident BladeXP */#define FB_ACCEL_CIRRUS_ALPINE 53 /* Cirrus Logic 543x/544x/5480 */#define FB_ACCEL_NEOMAGIC_NM2070 90 /* NeoMagic NM2070 */#define FB_ACCEL_NEOMAGIC_NM2090 91 /* NeoMagic NM2090 */#define FB_ACCEL_NEOMAGIC_NM2093 92 /* NeoMagic NM2093 */#define FB_ACCEL_NEOMAGIC_NM2097 93 /* NeoMagic NM2097 */#define FB_ACCEL_NEOMAGIC_NM2160 94 /* NeoMagic NM2160 */#define FB_ACCEL_NEOMAGIC_NM2200 95 /* NeoMagic NM2200 */#define FB_ACCEL_NEOMAGIC_NM2230 96 /* NeoMagic NM2230 */#define FB_ACCEL_NEOMAGIC_NM2360 97 /* NeoMagic NM2360 */#define FB_ACCEL_NEOMAGIC_NM2380 98 /* NeoMagic NM2380 */#define FB_ACCEL_PXA3XX 99 /* PXA3xx */#define FB_ACCEL_SAVAGE4 0x80 /* S3 Savage4 */#define FB_ACCEL_SAVAGE3D 0x81 /* S3 Savage3D */#define FB_ACCEL_SAVAGE3D_MV 0x82 /* S3 Savage3D-MV */#define FB_ACCEL_SAVAGE2000 0x83 /* S3 Savage2000 */#define FB_ACCEL_SAVAGE_MX_MV 0x84 /* S3 Savage/MX-MV */#define FB_ACCEL_SAVAGE_MX 0x85 /* S3 Savage/MX */#define FB_ACCEL_SAVAGE_IX_MV 0x86 /* S3 Savage/IX-MV */#define FB_ACCEL_SAVAGE_IX 0x87 /* S3 Savage/IX */#define FB_ACCEL_PROSAVAGE_PM 0x88 /* S3 ProSavage PM133 */#define FB_ACCEL_PROSAVAGE_KM 0x89 /* S3 ProSavage KM133 */#define FB_ACCEL_S3TWISTER_P 0x8a /* S3 Twister */#define FB_ACCEL_S3TWISTER_K 0x8b /* S3 TwisterK */#define FB_ACCEL_SUPERSAVAGE 0x8c /* S3 Supersavage */#define FB_ACCEL_PROSAVAGE_DDR 0x8d /* S3 ProSavage DDR */#define FB_ACCEL_PROSAVAGE_DDRK 0x8e /* S3 ProSavage DDR-K *//** * 该结构体用于描述显卡自身的属性 * 包括识别符，缓存地址，显卡类型等 * */struct fb_fix_screeninfo { char id[16]; /* identification string eg "TT Builtin" 标识符字符串*/ unsigned long smem_start; /* Start of frame buffer mem frame buffer所占内存的开始地址 */ /* (physical address) 这里说的是物理地址 */ __u32 smem_len; /* Length of frame buffer mem frame buffer所占内存的长度 */ __u32 type; /* see FB_TYPE_* 查看FB_BYTE_* */ __u32 type_aux; /* Interleave for interleaved Planes 交织交错的平面 */ __u32 visual; /* see FB_VISUAL_* 查看FB_VISUAL_* */ __u16 xpanstep; /* zero if no hardware panning 如何没有硬件支持的话为0 */ __u16 ypanstep; /* zero if no hardware panning 如果没有硬件支持的话为０*/ __u16 ywrapstep; /* zero if no hardware ywrap 如果没有硬件ywrap的话为０ */ __u32 line_length; /* length of a line in bytes 一行的长度，以byte为单位 */ unsigned long mmio_start; /* Start of Memory Mapped I/O 映射到I/O的内存的开始地址 */ /* (physical address) 物理地址*/ __u32 mmio_len; /* Length of Memory Mapped I/O 映射到I/O的内存长度*/ __u32 accel; /* Indicate to driver which 指示到驱动程序 */ /* specific chip/card we have 特别是我们拥有的芯片/卡*/ __u16 reserved[3]; /* Reserved for future compatibility 为后来的兼容性保留*/};/* Interpretation of offset for color fields: All offsets are from the right, * inside a "pixel" value, which is exactly 'bits_per_pixel' wide (means: you * can use the offset as right argument to <<). A pixel afterwards is a bit * stream and is written to video memory as that unmodified. * * 色域偏移的解释：所有的偏移量都来自于右边，在一个＂像素＂值里面，实际上是'bits_per_pixel' * 的宽度（也就是说：你可以使用该偏移量作为 << 的右参数）．一个像素之后是一个位流，并且 * 作为未被修改而被写到视频内存中． * * For pseudocolor: offset and length should be the same for all color * components. Offset specifies the position of the least significant bit * of the pallette index in a pixel value. Length indicates the number * of available palette entries (i.e. # of entries = 1 << length). * * 对于伪色彩来说：对于所有的颜色部分，偏移量和长度应该是相同的．偏移量指定了 * 在一个像素值里的调色板索引的最低有效位的位置．长度指明了可用的调色板入口的 * 数量． */ struct fb_bitfield { __u32 offset; /* 位域的开始 */ __u32 length; /* length of bitfield 位域的长度 */ __u32 msb_right; /* != 0 : Most significant bit is 不等于０，大多数重要的位是右边的 */ /* right */ };#define FB_NONSTD_HAM 1 /* Hold-And-Modify (HAM) 保持和修改 */#define FB_NONSTD_REV_PIX_IN_B 2 /* order of pixels in each byte is reversed 在每一个字节中的像素的顺序被保留下来 */#define FB_ACTIVATE_NOW 0 /* set values immediately (or vbl) 立即设定颜色 */#define FB_ACTIVATE_NXTOPEN 1 /* activate on next open 在下一个打开的时候激活 */#define FB_ACTIVATE_TEST 2 /* don't set, round up impossible 不设置 */#define FB_ACTIVATE_MASK 15 /* values */#define FB_ACTIVATE_VBL 16 /* activate values on next vbl 在下一个vbl的时候激活值 */#define FB_CHANGE_CMAP_VBL 32 /* change colormap on vbl 在vbl的时候改变色彩映射 */#define FB_ACTIVATE_ALL 64 /* change all VCs on this fb 在这个fb中改变所有的VC */#define FB_ACTIVATE_FORCE 128 /* force apply even when no change */#define FB_ACTIVATE_INV_MODE 256 /* invalidate videomode 即使在没有改变无效视频模式的时候强制应用 */#define FB_ACCELF_TEXT 1 /* (OBSOLETE) see fb_info.flags and vc_mode 已过时 */#define FB_SYNC_HOR_HIGH_ACT 1 /* horizontal sync high active 高活性水平同步 */#define FB_SYNC_VERT_HIGH_ACT 2 /* vertical sync high active 高活性垂直同步 */#define FB_SYNC_EXT 4 /* external sync 外部同步 */#define FB_SYNC_COMP_HIGH_ACT 8 /* composite sync high active 高活性复合同步 */#define FB_SYNC_BROADCAST 16 /* broadcast video timings 广播视频时序 */ /* vtotal = 144d/288n/576i => PAL */ /* vtotal = 121d/242n/484i => NTSC */#define FB_SYNC_ON_GREEN 32 /* sync on green 在绿色下同步 */#define FB_VMODE_NONINTERLACED 0 /* non interlaced 非交错模式 */#define FB_VMODE_INTERLACED 1 /* interlaced 交错模式 */#define FB_VMODE_DOUBLE 2 /* double scan 双扫描模式 */#define FB_VMODE_ODD_FLD_FIRST 4 /* interlaced: top line first 交错的：顶行优先 */#define FB_VMODE_MASK 255#define FB_VMODE_YWRAP 256 /* ywrap instead of panning ywrap而不是panning */#define FB_VMODE_SMOOTH_XPAN 512 /* smooth xpan possible (internally used) 平滑的xpan(内部使用) */#define FB_VMODE_CONUPDATE 512 /* don't update x/yoffset 不要更新 x/yoffset*//* * Display rotation support * * 旋转支持显示 */#define FB_ROTATE_UR 0#define FB_ROTATE_CW 1#define FB_ROTATE_UD 2#define FB_ROTATE_CCW 3#define PICOS2KHZ(a) (1000000000UL/(a))#define KHZ2PICOS(a) (1000000000UL/(a))/** * 用于描述显卡的一般特性，比如实际分辨率，虚拟分辨率，实际分辨率和虚拟 * 分辨率之间的位移等 */struct fb_var_screeninfo { __u32 xres; /* visible resolution 可见解析度 */ __u32 yres; __u32 xres_virtual; /* virtual resolution 虚拟解析度 */ __u32 yres_virtual; __u32 xoffset; /* offset from virtual to visible 虚拟到可见的偏移量 */ __u32 yoffset; /* resolution */ __u32 bits_per_pixel; /* guess what BPP : 每个像素的位数 */ __u32 grayscale; /* != 0 Graylevels instead of colors !=０指灰度而不是颜色 */ //如果是真实的颜色的话表示在fb内存中的位域，如果不是颜色的话，仅仅就是长度 //在这里保存的是fb缓存的R/G/B位域 struct fb_bitfield red; /* bitfield in fb mem if true color, */ struct fb_bitfield green; /* else only length is significant */ struct fb_bitfield blue; struct fb_bitfield transp; /* transparency 透明度 */ __u32 nonstd; /* != 0 Non standard pixel format !=0 非标准像素格式 */ __u32 activate; /* see FB_ACTIVATE_* 查看FB_ACTIVATE_* */ __u32 height; /* height of picture in mm 在内存中图片的高度 */ __u32 width; /* width of picture in mm 在内存中图片的宽度 */ __u32 accel_flags; /* (OBSOLETE) see fb_info.flags 已过时*/ /* Timing: All values in pixclocks, except pixclock (of course) */ /* 除了pixclock本身外，其他的都已pixclock为单位*/ __u32 pixclock; /* pixel clock in ps (pico seconds) 像素时钟（皮秒）*/ __u32 left_margin; /* time from sync to picture 行切换：从绘图到同步之间的延迟 */ __u32 right_margin; /* time from picture to sync 行切换：从绘图到同步之间的延迟 */ __u32 upper_margin; /* time from sync to picture 帧切换：从同步到绘图之间的延迟 */ __u32 lower_margin; // 帧切换，从绘图到同步之间的延迟 __u32 hsync_len; /* length of horizontal sync 水平同步的长度 */ __u32 vsync_len; /* length of vertical sync 垂直同步的长度 */ __u32 sync; /* see FB_SYNC_* 查看FB_SYNC_* */ __u32 vmode; /* see FB_VMODE_* 查看 FB_VMODE_* */ __u32 rotate; /* angle we rotate counter clockwise 顺时针旋转的角度 */ __u32 reserved[5]; /* Reserved for future compatibility 保留 */};/** * 用于描述设备无关的颜色映射信息 */struct fb_cmap { __u32 start; /* First entry 第一个元素入口 */ __u32 len; /* Number of entries 元素的数量*/ //R,G,B,透明度 __u16 *red; /* Red values */ __u16 *green; __u16 *blue; __u16 *transp; /* transparency, can be NULL 透明度，可以为空 */};struct fb_con2fbmap { __u32 console; __u32 framebuffer;};/* VESA Blanking Levels */#define VESA_NO_BLANKING 0#define VESA_VSYNC_SUSPEND 1#define VESA_HSYNC_SUSPEND 2#define VESA_POWERDOWN 3enum { /* screen: unblanked, hsync: on, vsync: on */ FB_BLANK_UNBLANK = VESA_NO_BLANKING, /* screen: blanked, hsync: on, vsync: on */ FB_BLANK_NORMAL = VESA_NO_BLANKING + 1, /* screen: blanked, hsync: on, vsync: off */ FB_BLANK_VSYNC_SUSPEND = VESA_VSYNC_SUSPEND + 1, /* screen: blanked, hsync: off, vsync: on */ FB_BLANK_HSYNC_SUSPEND = VESA_HSYNC_SUSPEND + 1, /* screen: blanked, hsync: off, vsync: off */ FB_BLANK_POWERDOWN = VESA_POWERDOWN + 1};#define FB_VBLANK_VBLANKING 0x001 /* currently in a vertical blank */#define FB_VBLANK_HBLANKING 0x002 /* currently in a horizontal blank */#define FB_VBLANK_HAVE_VBLANK 0x004 /* vertical blanks can be detected */#define FB_VBLANK_HAVE_HBLANK 0x008 /* horizontal blanks can be detected */#define FB_VBLANK_HAVE_COUNT 0x010 /* global retrace counter is available */#define FB_VBLANK_HAVE_VCOUNT 0x020 /* the vcount field is valid */#define FB_VBLANK_HAVE_HCOUNT 0x040 /* the hcount field is valid */#define FB_VBLANK_VSYNCING 0x080 /* currently in a vsync */#define FB_VBLANK_HAVE_VSYNC 0x100 /* verical syncs can be detected */struct fb_vblank { __u32 flags; /* FB_VBLANK flags FB_VBLANK标志 */ __u32 count; /* counter of retraces since boot 启动之后追溯的次数 */ __u32 vcount; /* current scanline position 当前扫描行位置 */ __u32 hcount; /* current scandot position 当前扫描点位置 */ __u32 reserved[4]; /* reserved for future compatibility 保留 */};/* Internal HW accel 内部硬件加速 */#define ROP_COPY 0#define ROP_XOR 1//复制区域 struct fb_copyarea { __u32 dx; __u32 dy; __u32 width; __u32 height; __u32 sx; __u32 sy;};//回执矩形struct fb_fillrect { __u32 dx; /* screen-relative 屏幕相关 */ __u32 dy; __u32 width; __u32 height; __u32 color; __u32 rop;};struct fb_image { __u32 dx; /* Where to place image 图像放在哪里 */ __u32 dy; __u32 width; /* Size of image 图像的宽度和高度 */ __u32 height; __u32 fg_color; /* Only used when a mono bitmap 仅仅是单色图像的时候使用 */ __u32 bg_color; __u8 depth; /* Depth of the image 图像的深度 */ const char *data; /* Pointer to image data 指向图像数据的指针 */ struct fb_cmap cmap; /* color map info 颜色映射信息 */};/* * hardware cursor control * 硬件光标控制 */#define FB_CUR_SETIMAGE 0x01#define FB_CUR_SETPOS 0x02#define FB_CUR_SETHOT 0x04#define FB_CUR_SETCMAP 0x08#define FB_CUR_SETSHAPE 0x10#define FB_CUR_SETSIZE 0x20#define FB_CUR_SETALL 0xFF// 光标位置 struct fbcurpos { __u16 x, y;};struct fb_cursor { __u16 set; /* what to set 设置成什么 */ __u16 enable; /* cursor on/off 光标打开/关闭 */ __u16 rop; /* bitop operation 位操作 */ const char *mask; /* cursor mask bits 光标掩码位 */ struct fbcurpos hot; /* cursor hot spot 光标热点 */ struct fb_image image; /* Cursor image 光标图像 */};#ifdef CONFIG_FB_BACKLIGHT/* Settings for the generic backlight code */#define FB_BACKLIGHT_LEVELS 128#define FB_BACKLIGHT_MAX 0xFF#endif#ifdef __KERNEL__#include <linux/fs.h>#include <linux/init.h>#include <linux/device.h>#include <linux/workqueue.h>#include <linux/notifier.h>#include <linux/list.h>#include <linux/backlight.h>#include <asm/io.h>struct vm_area_struct;struct fb_info;struct device;struct file;/* Definitions below are used in the parsed monitor specs */#define FB_DPMS_ACTIVE_OFF 1#define FB_DPMS_SUSPEND 2#define FB_DPMS_STANDBY 4#define FB_DISP_DDI 1#define FB_DISP_ANA_700_300 2#define FB_DISP_ANA_714_286 4#define FB_DISP_ANA_1000_400 8#define FB_DISP_ANA_700_000 16#define FB_DISP_MONO 32#define FB_DISP_RGB 64#define FB_DISP_MULTI 128#define FB_DISP_UNKNOWN 256#define FB_SIGNAL_NONE 0#define FB_SIGNAL_BLANK_BLANK 1#define FB_SIGNAL_SEPARATE 2#define FB_SIGNAL_COMPOSITE 4#define FB_SIGNAL_SYNC_ON_GREEN 8#define FB_SIGNAL_SERRATION_ON 16#define FB_MISC_PRIM_COLOR 1#define FB_MISC_1ST_DETAIL 2 /* First Detailed Timing is preferred 第一次详细的时间是首选 */struct fb_chroma { __u32 redx; /* in fraction of 1024 1024的一小部分 */ __u32 greenx; __u32 bluex; __u32 whitex; __u32 redy; __u32 greeny; __u32 bluey; __u32 whitey;};struct fb_monspecs { struct fb_chroma chroma; struct fb_videomode *modedb; /* mode database 模式数据库 */ __u8 manufacturer[4]; /* Manufacturer 制造商 */ __u8 monitor[14]; /* Monitor String 监视字符串 */ __u8 serial_no[14]; /* Serial Number 序列号 */ __u8 ascii[14]; /* ? */ __u32 modedb_len; /* mode database length 模式数据库长度 */ __u32 model; /* Monitor Model 监视模型 */ __u32 serial; /* Serial Number - Integer 序列号－整数 */ __u32 year; /* Year manufactured 制造年*/ __u32 week; /* Week Manufactured 制造周 */ __u32 hfmin; /* hfreq lower limit (Hz) hfreq最低限制*/ __u32 hfmax; /* hfreq upper limit (Hz) hfreq最高限制*/ __u32 dclkmin; /* pixelclock lower limit (Hz) pixelclock最低限制*/ __u32 dclkmax; /* pixelclock upper limit (Hz) pixelclock最高限制*/ __u16 input; /* display type - see FB_DISP_* 显示类型 - 查看FB_DISP_* */ __u16 dpms; /* DPMS support - see FB_DPMS_ DPMS支持－查看FB_DPMS_ */ __u16 signal; /* Signal Type - see FB_SIGNAL_* 信号类型 － 查看FB_SIGNAL_* */ __u16 vfmin; /* vfreq lower limit (Hz) vfreq最低限制 */ __u16 vfmax; /* vfreq upper limit (Hz) vfreq最高限制 */ __u16 gamma; /* Gamma - in fractions of 100 100的分数 */ __u16 gtf : 1; /* supports GTF 支持 GTF */ __u16 misc; /* Misc flags - see FB_MISC_* Misc标识 － 查看FB_MISC_* */ __u8 version; /* EDID version... EDID版本 */ __u8 revision; /* ...and revision 修订版本 */ __u8 max_x; /* Maximum horizontal size (cm) 最大水平大小 */ __u8 max_y; /* Maximum vertical size (cm) 最大垂直大小 */};struct fb_cmap_user { __u32 start; /* First entry 第一元素入口 */ __u32 len; /* Number of entries 元素的数量 */ //R,G,B和透明度 __u16 __user *red; /* Red values */ __u16 __user *green; __u16 __user *blue; __u16 __user *transp; /* transparency, can be NULL */};struct fb_image_user { __u32 dx; /* Where to place image */ __u32 dy; __u32 width; /* Size of image */ __u32 height; __u32 fg_color; /* Only used when a mono bitmap */ __u32 bg_color; __u8 depth; /* Depth of the image */ const char __user *data; /* Pointer to image data */ struct fb_cmap_user cmap; /* color map info */};struct fb_cursor_user { __u16 set; /* what to set */ __u16 enable; /* cursor on/off */ __u16 rop; /* bitop operation */ const char __user *mask; /* cursor mask bits */ struct fbcurpos hot; /* cursor hot spot */ struct fb_image_user image; /* Cursor image */};/* * Register/unregister for framebuffer events * framebuffer事件的注册/注销 *//* The resolution of the passed in fb_info about to change */// 在fb_info中通过的分辨率将要改变#define FB_EVENT_MODE_CHANGE 0x01/* The display on this fb_info is beeing suspended, no access to the * framebuffer is allowed any more after that call returns * 在这个fb_info的显示是被悬挂着的，在那个调用返回之后的对framebuffer * 的访问是不被允许的． */#define FB_EVENT_SUSPEND 0x02/* The display on this fb_info was resumed, you can restore the display * if you own it * 在这个fb_info中的显示恢复了，如果你拥有他，你可以恢复显示 * */#define FB_EVENT_RESUME 0x03/* An entry from the modelist was removed */// 模式列表中的一个元素被移走了#define FB_EVENT_MODE_DELETE 0x04/* A driver registered itself */// 一个驱动注册了他自己#define FB_EVENT_FB_REGISTERED 0x05/* A driver unregistered itself */// 一个驱动注销了他自己 #define FB_EVENT_FB_UNREGISTERED 0x06/* CONSOLE-SPECIFIC: get console to framebuffer mapping */// 获取framebuffer映射的控制台#define FB_EVENT_GET_CONSOLE_MAP 0x07/* CONSOLE-SPECIFIC: set console to framebuffer mapping */// 设置framebuffer映射的控制台#define FB_EVENT_SET_CONSOLE_MAP 0x08/* A hardware display blank change occured */// 一个硬件显示空改变发生了#define FB_EVENT_BLANK 0x09/* Private modelist is to be replaced */// 内部的模式列表将被替换#define FB_EVENT_NEW_MODELIST 0x0A/* The resolution of the passed in fb_info about to change and all vc's should be changed */// 在fb_info中通过的分辨率将要改变，并且所有的vc应该被改变#define FB_EVENT_MODE_CHANGE_ALL 0x0B/* A software display blank change occured */// 一个软件显示空改变发生了#define FB_EVENT_CONBLANK 0x0C/* Get drawing requirements */// 获取画图需求#define FB_EVENT_GET_REQ 0x0D/* Unbind from the console if possible */// 如果可能的话从控制台中接触绑定#define FB_EVENT_FB_UNBIND 0x0E/* CONSOLE-SPECIFIC: remap all consoles to new fb - for vga switcheroo */// 重新将所有的控制台映射到新的fb -- 对于vga switcheroo来说的#define FB_EVENT_REMAP_ALL_CONSOLE 0x0Fstruct fb_event { struct fb_info *info; void *data;};struct fb_blit_caps { u32 x; u32 y; u32 len; u32 flags;};extern int fb_register_client(struct notifier_block *nb);extern int fb_unregister_client(struct notifier_block *nb);extern int fb_notifier_call_chain(unsigned long val, void *v);/* * Pixmap structure definition * Pixmap 结构体定义 * The purpose of this structure is to translate data * from the hardware independent format of fbdev to what * format the hardware needs. * 该结构体的目的就是将数据从fbdev的硬件独立的格式转换成 * 硬件需要的格式 * */#define FB_PIXMAP_DEFAULT 1 /* used internally by fbcon 被fvbcon内部使用*/#define FB_PIXMAP_SYSTEM 2 /* memory is in system RAM 内存在系统RAM中*/#define FB_PIXMAP_IO 4 /* memory is iomapped 内存被io映射了*/#define FB_PIXMAP_SYNC 256 /* set if GPU can DMA 如果GPU能够使用DMA的话设置*/struct fb_pixmap { u8 *addr; /* pointer to memory 指向内存的指针 */ u32 size; /* size of buffer in bytes 缓冲的字节数大小 */ u32 offset; /* current offset to buffer 当前到buffer的偏移量 */ u32 buf_align; /* byte alignment of each bitmap 每一个位图的字节对齐 */ u32 scan_align; /* alignment per scanline 每一个扫描行的对齐 */ u32 access_align; /* alignment per read/write (bits) 每一个读写位的对齐 */ u32 flags; /* see FB_PIXMAP_* 查看FB_PIXMAP_* */ u32 blit_x; /* supported bit block dimensions (1-32) 支持位块尺寸(1-32) */ u32 blit_y; /* Format: blit_x = 1 << (width - 1) */ /* blit_y = 1 << (height - 1) */ /* if 0, will be set to 0xffffffff (all) 如果是０，则被设置为0xffffffff */ /* access methods 访问方法 */ void (*writeio)(struct fb_info *info, void __iomem *dst, void *src, unsigned int size); void (*readio) (struct fb_info *info, void *dst, void __iomem *src, unsigned int size);};#ifdef CONFIG_FB_DEFERRED_IOstruct fb_deferred_io { /* delay between mkwrite and deferred handler 在mkwrite和延期的处理程序的时间 */ unsigned long delay; struct mutex lock; /* mutex that protects the page list 保护页列表的互斥锁 */ struct list_head pagelist; /* list of touched pages 被创建的页的列表*/ /* callback 回调函数*/ void (*deferred_io)(struct fb_info *info, struct list_head *pagelist);};#endif/* * Frame buffer operations * Frame buffer 的操作 * LOCKING NOTE: those functions must _ALL_ be called with the console * semaphore held, this is the only suitable locking mechanism we have * in 2.6. Some may be called at interrupt time at this point though. * 这些函数必须要使用semaphore锁． */struct fb_ops { /* open/release and usage marking */ // 打开/释放和使用标记 struct module *owner; int (*fb_open)(struct fb_info *info, int user); int (*fb_release)(struct fb_info *info, int user); /* For framebuffers with strange non linear layouts or that do not * work with normal memory mapped access * 对于拥有陌生的非线性布局的framebuffer来说，不能使用普通的内存 * 映射访问来工作 */ ssize_t (*fb_read)(struct fb_info *info, char __user *buf, size_t count, loff_t *ppos); ssize_t (*fb_write)(struct fb_info *info, const char __user *buf, size_t count, loff_t *ppos); /* checks var and eventually tweaks it to something supported, * DO NOT MODIFY PAR */ // 检查var并且事件性的调整到可支持状态．不要修改PAR int (*fb_check_var)(struct fb_var_screeninfo *var, struct fb_info *info); /* set the video mode according to info->var */ // 通过info->var设置视频模式 int (*fb_set_par)(struct fb_info *info); /* set color register */ // 设置颜色寄存器 int (*fb_setcolreg)(unsigned regno, unsigned red, unsigned green, unsigned blue, unsigned transp, struct fb_info *info); /* set color registers in batch */ // 批处理设置颜色寄存器 int (*fb_setcmap)(struct fb_cmap *cmap, struct fb_info *info); /* blank display */ // 空显示 int (*fb_blank)(int blank, struct fb_info *info); /* pan display */ // pan 显示 int (*fb_pan_display)(struct fb_var_screeninfo *var, struct fb_info *info); /* Draws a rectangle */ // 绘制一个矩形 void (*fb_fillrect) (struct fb_info *info, const struct fb_fillrect *rect); /* Copy data from area to another */ // 从一个区域复制数据到另外一个区域 void (*fb_copyarea) (struct fb_info *info, const struct fb_copyarea *region); /* Draws a image to the display */ // 在显示器上绘制一个图像 void (*fb_imageblit) (struct fb_info *info, const struct fb_image *image); /* Draws cursor */ // 绘制光标 int (*fb_cursor) (struct fb_info *info, struct fb_cursor *cursor); /* Rotates the display */ // 旋转显示 void (*fb_rotate)(struct fb_info *info, int angle); /* wait for blit idle, optional */ // 等待blit空闲，可选 int (*fb_sync)(struct fb_info *info); /* perform fb specific ioctl (optional) */ // 运行fb指定的ioctl(可选) int (*fb_ioctl)(struct fb_info *info, unsigned int cmd, unsigned long arg); /* Handle 32bit compat ioctl (optional) */ // 处理３２位兼容的ioctl int (*fb_compat_ioctl)(struct fb_info *info, unsigned cmd, unsigned long arg); /* perform fb specific mmap */ // 运行fb指定的mmap int (*fb_mmap)(struct fb_info *info, struct vm_area_struct *vma); /* get capability given var */ // 获取给定的var的能力 void (*fb_get_caps)(struct fb_info *info, struct fb_blit_caps *caps, struct fb_var_screeninfo *var); /* teardown any resources to do with this framebuffer */ // 卸载与该framebuffer相关的任何资源 void (*fb_destroy)(struct fb_info *info);};#ifdef CONFIG_FB_TILEBLITTING#define FB_TILE_CURSOR_NONE 0#define FB_TILE_CURSOR_UNDERLINE 1#define FB_TILE_CURSOR_LOWER_THIRD 2#define FB_TILE_CURSOR_LOWER_HALF 3#define FB_TILE_CURSOR_TWO_THIRDS 4#define FB_TILE_CURSOR_BLOCK 5struct fb_tilemap { __u32 width; /* width of each tile in pixels 像素的宽度 */ __u32 height; /* height of each tile in scanlines 扫描行的高度 */ __u32 depth; /* color depth of each tile 颜色深度 */ __u32 length; /* number of tiles in the map 在映射中的数量 */ const __u8 *data; /* actual tile map: a bitmap array, packed to the nearest byte 实际映射：一个位图数组，被打包到最近的位 */};struct fb_tilerect { __u32 sx; /* origin in the x-axis 在x轴中原点*/ __u32 sy; /* origin in the y-axis 在y轴中的原点*/ __u32 width; /* number of tiles in the x-axis 在x-axis 中的数量 */ __u32 height; /* number of tiles in the y-axis 在y-axis中的数量 */ __u32 index; /* what tile to use: index to tile map 使用哪一个tile:到tile映射的索引 */ __u32 fg; /* foreground color 前景色 */ __u32 bg; /* background color 后景色 */ __u32 rop; /* raster operation 光栅操作 */};struct fb_tilearea { __u32 sx; /* source origin in the x-axis 在X轴的源原点 */ __u32 sy; /* source origin in the y-axis 在y轴的源原点 */ __u32 dx; /* destination origin in the x-axis 在x轴的目的原点 */ __u32 dy; /* destination origin in the y-axis 在y轴的目的原点 */ __u32 width; /* number of tiles in the x-axis 在x轴中的tiles的数量 */ __u32 height; /* number of tiles in the y-axis 在y轴中的tiles的数量 */};struct fb_tileblit { __u32 sx; /* origin in the x-axis 在x轴的原点 */ __u32 sy; /* origin in the y-axis 在y轴的原点*/ __u32 width; /* number of tiles in the x-axis 在x轴上的tiles的数量 */ __u32 height; /* number of tiles in the y-axis 在y轴上的tiles的数量 */ __u32 fg; /* foreground color 前景色*/ __u32 bg; /* background color 后景色*/ __u32 length; /* number of tiles to draw 要绘制的tiles的数量 */ __u32 *indices; /* array of indices to tile map 到tile映射的指数数组 */};struct fb_tilecursor { __u32 sx; /* cursor position in the x-axis 在x轴的光标位置*/ __u32 sy; /* cursor position in the y-axis 在y轴的光标位置 */ __u32 mode; /* 0 = erase, 1 = draw 0 = 擦除，１＝绘制*/ __u32 shape; /* see FB_TILE_CURSOR_* 查看FB_TILE_CURSOR_* */ __u32 fg; /* foreground color 前景色*/ __u32 bg; /* background color 后景色*/};struct fb_tile_ops { /* set tile characteristics 设置tile的特征*/ void (*fb_settile)(struct fb_info *info, struct fb_tilemap *map); /* all dimensions from hereon are in terms of tiles */ // 从现在起，所有尺寸都在tiles方面 /* move a rectangular region of tiles from one area to another*/ // 移动一个矩形区域从一个地方到另外一个地方 void (*fb_tilecopy)(struct fb_info *info, struct fb_tilearea *area); /* fill a rectangular region with a tile */ // 使用一个tile填充一个矩形区域 void (*fb_tilefill)(struct fb_info *info, struct fb_tilerect *rect); /* copy an array of tiles */ // 复制一个tile数组 void (*fb_tileblit)(struct fb_info *info, struct fb_tileblit *blit); /* cursor */ // 光标 void (*fb_tilecursor)(struct fb_info *info, struct fb_tilecursor *cursor); /* get maximum length of the tile map */ // 获取tile映射的最大长度 int (*fb_get_tilemax)(struct fb_info *info);};#endif /* CONFIG_FB_TILEBLITTING *//* FBINFO_* = fb_info.flags bit flags FBINFO_* ＝ fb_info.flags 位标识 */#define FBINFO_MODULE 0x0001 /* Low-level driver is a module 底层驱动是一个模块 */#define FBINFO_HWACCEL_DISABLED 0x0002 /* When FBINFO_HWACCEL_DISABLED is set: * Hardware acceleration is turned off. Software implementations * of required functions (copyarea(), fillrect(), and imageblit()) * takes over; acceleration engine should be in a quiescent state */ /* 当FBINFO_HWACCEL_DISABLED被设置的时候： * 硬件加速被关掉．所需功能的软件实现(copyarea(),fillrect()和imageblit()) * 接管．加速引擎应该位域静态状态 */* hints 提示*/#define FBINFO_VIRTFB 0x0004 /* FB is System RAM, not device. FB是系统RAM，不是设备*/#define FBINFO_PARTIAL_PAN_OK 0x0040 /* otw use pan only for double-buffering otw使用pan仅仅用于双缓冲 */#define FBINFO_READS_FAST 0x0080 /* soft-copy faster than rendering 软拷贝快于渲染 *//* hardware supported ops *//* semantics: when a bit is set, it indicates that the operation is * accelerated by hardware. * 支持的硬件操作 * 语义：当一个位被设置，意味着操作被硬件加速了 * * required functions will still work even if the bit is not set. * 即使位没有被设置，所需的功能依旧工作． * optional functions may not even exist if the flag bit is not set. * 如果标识位没有被设置，可选的功能可能甚至不存在 */#define FBINFO_HWACCEL_NONE 0x0000#define FBINFO_HWACCEL_COPYAREA 0x0100 /* required 需要*/#define FBINFO_HWACCEL_FILLRECT 0x0200 /* required 需要*/#define FBINFO_HWACCEL_IMAGEBLIT 0x0400 /* required 需要*/#define FBINFO_HWACCEL_ROTATE 0x0800 /* optional 可选*/#define FBINFO_HWACCEL_XPAN 0x1000 /* optional 可选*/#define FBINFO_HWACCEL_YPAN 0x2000 /* optional */#define FBINFO_HWACCEL_YWRAP 0x4000 /* optional */#define FBINFO_MISC_USEREVENT 0x10000 /* event request from userspace 从用户空间时间需要*/#define FBINFO_MISC_TILEBLITTING 0x20000 /* use tile blitting 使用tile blitting*/#define FBINFO_MISC_FIRMWARE 0x40000 /* a replaceable firmware inited framebuffer 一个可替换的固件初始化的framebuffer*//* A driver may set this flag to indicate that it does want a set_par to be * called every time when fbcon_switch is executed. The advantage is that with * this flag set you can really be sure that set_par is always called before * any of the functions dependant on the correct hardware state or altering * that state, even if you are using some broken X releases. The disadvantage * is that it introduces unwanted delays to every console switch if set_par * is slow. It is a good idea to try this flag in the drivers initialization * code whenever there is a bug report related to switching between X and the * framebuffer console. * 一个驱动可能会设置这个标识来表明每次当fbcon_switch被执行的时候，他不想调用set_par()． * 他的优点就是伴随着这个标识的设置，你可以确定set_par在任何依赖于正确的硬件状态 * 或者是改变那个状态之前被一直调用，即使你整在使用一些x发行版．他的缺点就是如果 * set_par太慢的话，在显示在每一个控制台的时候，会导致不希望的延迟． * * */#define FBINFO_MISC_ALWAYS_SETPAR 0x40000/* * Host and GPU endianness differ. * 主机和GPU端不同 */#define FBINFO_FOREIGN_ENDIAN 0x100000/* * Big endian math. This is the same flags as above, but with different * meaning, it is set by the fb subsystem depending FOREIGN_ENDIAN flag * and host endianness. Drivers should not use this flag. * 大端数学．这个是和上面一样的标识，但是意义却是不一样的，他是被依赖于FOREIGN_ENDIAN端 * 和主机端的fb子系统所设置的．驱动不应该使用这个标识 * */#define FBINFO_BE_MATH 0x100000struct fb_info { int node; int flags; struct mutex lock; /* Lock for open/release/ioctl funcs 用于open/release/ioctl函数的锁 */ struct mutex mm_lock; /* Lock for fb_mmap and smem_* fields 用于fb_mmap和smem_* 域的锁 */ struct fb_var_screeninfo var; /* Current var 可变参数*/ struct fb_fix_screeninfo fix; /* Current fix 固定参数 */ struct fb_monspecs monspecs; /* Current Monitor specs 显示器标准 */ struct work_struct queue; /* Framebuffer event queue 帧缓冲事件队列 */ struct fb_pixmap pixmap; /* Image hardware mapper 图像硬件mapper */ struct fb_pixmap sprite; /* Cursor hardware mapper 光标硬件mapper */ struct fb_cmap cmap; /* Current cmap 目前的颜色表 */ struct list_head modelist; /* mode list 模式列表 */ struct fb_videomode *mode; /* current mode 当前的video模式 */#ifdef CONFIG_FB_BACKLIGHT /* assigned backlight device 对应的背光设备*/ /* set before framebuffer registration, remove after unregister 在framebuffer注册之前被设置，在注销之后移走 */ struct backlight_device *bl_dev; /* Backlight level curve 背光调整 */ struct mutex bl_curve_mutex; u8 bl_curve[FB_BACKLIGHT_LEVELS];#endif#ifdef CONFIG_FB_DEFERRED_IO struct delayed_work deferred_work; struct fb_deferred_io *fbdefio;#endif struct fb_ops *fbops; // 帧缓冲操作 struct device *device; /* This is the parent 辐射被*/ struct device *dev; /* This is this fb device fb设备 */ int class_flag; /* private sysfs flags 私有sysfs标识 */#ifdef CONFIG_FB_TILEBLITTING struct fb_tile_ops *tileops; /* Tile Blitting 图块blitting */#endif char __iomem *screen_base; /* Virtual address 虚拟基地址 */ unsigned long screen_size; /* Amount of ioremapped VRAM or 0 ioremapped的虚拟内存大小 或者是 ０*/ void *pseudo_palette; /* Fake palette of 16 colors 伪１６色颜色表 */ #define FBINFO_STATE_RUNNING 0#define FBINFO_STATE_SUSPENDED 1 u32 state; /* Hardware state i.e suspend 硬件状态，如挂起 */ void *fbcon_par; /* fbcon use-only private area fbcon仅仅用于私有区域*/ /* From here on everything is device dependent 从这里开始所有的事物都是设备依赖的 */ void *par; /* we need the PCI or similiar aperture base/size not smem_start/size as smem_start may just be an object allocated inside the aperture so may not actually overlap */ resource_size_t aperture_base; resource_size_t aperture_size;};#ifdef MODULE#define FBINFO_DEFAULT FBINFO_MODULE#else#define FBINFO_DEFAULT 0#endif// This will go away 这将会走开#define FBINFO_FLAG_MODULE FBINFO_MODULE#define FBINFO_FLAG_DEFAULT FBINFO_DEFAULT/* This will go away * fbset currently hacks in FB_ACCELF_TEXT into var.accel_flags * when it wants to turn the acceleration engine on. This is * really a separate operation, and should be modified via sysfs. * But for now, we leave it broken with the following define * 这将会走开．当他想要打开加速引擎的时候，fbset会到var.accel_falgs. * 这个事实上是一个分离的操作，并且应该有sysfs修改．但是，对于现在来说， * 我们把他打破与下面的定义． */#define STUPID_ACCELF_TEXT_SHIT// This will go away// 这个将走开#if defined(__sparc__)/* We map all of our framebuffers such that big-endian accesses * are what we want, so the following is sufficient. * * 我们映射所有的framebuffers，例如大端访问是我们需要的，所以下面的就足够了 */// This will go away#define fb_readb sbus_readb#define fb_readw sbus_readw#define fb_readl sbus_readl#define fb_readq sbus_readq#define fb_writeb sbus_writeb#define fb_writew sbus_writew#define fb_writel sbus_writel#define fb_writeq sbus_writeq#define fb_memset sbus_memset_io#elif defined(__i386__) || defined(__alpha__) || defined(__x86_64__) || defined(__hppa__) || defined(__sh__) || defined(__powerpc__) || defined(__avr32__) || defined(__bfin__)#define fb_readb __raw_readb#define fb_readw __raw_readw#define fb_readl __raw_readl#define fb_readq __raw_readq#define fb_writeb __raw_writeb#define fb_writew __raw_writew#define fb_writel __raw_writel#define fb_writeq __raw_writeq#define fb_memset memset_io#else#define fb_readb(addr) (*(volatile u8 *) (addr))#define fb_readw(addr) (*(volatile u16 *) (addr))#define fb_readl(addr) (*(volatile u32 *) (addr))#define fb_readq(addr) (*(volatile u64 *) (addr))#define fb_writeb(b,addr) (*(volatile u8 *) (addr) = (b))#define fb_writew(b,addr) (*(volatile u16 *) (addr) = (b))#define fb_writel(b,addr) (*(volatile u32 *) (addr) = (b))#define fb_writeq(b,addr) (*(volatile u64 *) (addr) = (b))#define fb_memset memset#endif#define FB_LEFT_POS(p, bpp) (fb_be_math(p) ? (32 - (bpp)) : 0)#define FB_SHIFT_HIGH(p, val, bits) (fb_be_math(p) ? (val) >> (bits) : \ (val) << (bits))#define FB_SHIFT_LOW(p, val, bits) (fb_be_math(p) ? (val) << (bits) : \ (val) >> (bits)) /* * `Generic' versions of the frame buffer device operations * framebuffer的'Generis'版本的设备操作 * */extern int fb_set_var(struct fb_info *info, struct fb_var_screeninfo *var); extern int fb_pan_display(struct fb_info *info, struct fb_var_screeninfo *var); extern int fb_blank(struct fb_info *info, int blank);extern void cfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect); extern void cfb_copyarea(struct fb_info *info, const struct fb_copyarea *area); extern void cfb_imageblit(struct fb_info *info, const struct fb_image *image);/* * Drawing operations where framebuffer is in system RAM * 在framebuffer所在的系统RAM绘制操作 * */extern void sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect);extern void sys_copyarea(struct fb_info *info, const struct fb_copyarea *area);extern void sys_imageblit(struct fb_info *info, const struct fb_image *image);extern ssize_t fb_sys_read(struct fb_info *info, char __user *buf, size_t count, loff_t *ppos);extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf, size_t count, loff_t *ppos);/* drivers/video/fbmem.c */extern int register_framebuffer(struct fb_info *fb_info);extern int unregister_framebuffer(struct fb_info *fb_info);extern int fb_prepare_logo(struct fb_info *fb_info, int rotate);extern int fb_show_logo(struct fb_info *fb_info, int rotate);extern char* fb_get_buffer_offset(struct fb_info *info, struct fb_pixmap *buf, u32 size);extern void fb_pad_unaligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 idx, u32 height, u32 shift_high, u32 shift_low, u32 mod);extern void fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height);extern void fb_set_suspend(struct fb_info *info, int state);extern int fb_get_color_depth(struct fb_var_screeninfo *var, struct fb_fix_screeninfo *fix);extern int fb_get_options(char *name, char **option);extern int fb_new_modelist(struct fb_info *info);extern struct fb_info *registered_fb[FB_MAX];extern int num_registered_fb;extern struct class *fb_class;extern int lock_fb_info(struct fb_info *info);static inline void unlock_fb_info(struct fb_info *info){ mutex_unlock(&info->lock);}static inline void __fb_pad_aligned_buffer(u8 *dst, u32 d_pitch, u8 *src, u32 s_pitch, u32 height){ int i, j; d_pitch -= s_pitch; for (i = height; i--; ) { /* s_pitch is a few bytes at the most, memcpy is suboptimal */ for (j = 0; j < s_pitch; j++) *dst++ = *src++; dst += d_pitch; }}/* drivers/video/fb_defio.c */extern void fb_deferred_io_init(struct fb_info *info);extern void fb_deferred_io_open(struct fb_info *info, struct inode *inode, struct file *file);extern void fb_deferred_io_cleanup(struct fb_info *info);extern int fb_deferred_io_fsync(struct file *file, struct dentry *dentry, int datasync);static inline bool fb_be_math(struct fb_info *info){#ifdef CONFIG_FB_FOREIGN_ENDIAN#if defined(CONFIG_FB_BOTH_ENDIAN) return info->flags & FBINFO_BE_MATH;#elif defined(CONFIG_FB_BIG_ENDIAN) return true;#elif defined(CONFIG_FB_LITTLE_ENDIAN) return false;#endif /* CONFIG_FB_BOTH_ENDIAN */#else#ifdef __BIG_ENDIAN return true;#else return false;#endif /* __BIG_ENDIAN */#endif /* CONFIG_FB_FOREIGN_ENDIAN */}/* drivers/video/fbsysfs.c */extern struct fb_info *framebuffer_alloc(size_t size, struct device *dev);extern void framebuffer_release(struct fb_info *info);extern int fb_init_device(struct fb_info *fb_info);extern void fb_cleanup_device(struct fb_info *head);extern void fb_bl_default_curve(struct fb_info *fb_info, u8 off, u8 min, u8 max);/* drivers/video/fbmon.c */#define FB_MAXTIMINGS 0#define FB_VSYNCTIMINGS 1#define FB_HSYNCTIMINGS 2#define FB_DCLKTIMINGS 3#define FB_IGNOREMON 0x100#define FB_MODE_IS_UNKNOWN 0#define FB_MODE_IS_DETAILED 1#define FB_MODE_IS_STANDARD 2#define FB_MODE_IS_VESA 4#define FB_MODE_IS_CALCULATED 8#define FB_MODE_IS_FIRST 16#define FB_MODE_IS_FROM_VAR 32extern int fbmon_dpms(const struct fb_info *fb_info);extern int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var, struct fb_info *info);extern int fb_validate_mode(const struct fb_var_screeninfo *var, struct fb_info *info);extern int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var);extern const unsigned char *fb_firmware_edid(struct device *device);extern void fb_edid_to_monspecs(unsigned char *edid, struct fb_monspecs *specs);extern void fb_destroy_modedb(struct fb_videomode *modedb);extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb);extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter);/* drivers/video/modedb.c */#define VESA_MODEDB_SIZE 34extern void fb_var_to_videomode(struct fb_videomode *mode, const struct fb_var_screeninfo *var);extern void fb_videomode_to_var(struct fb_var_screeninfo *var, const struct fb_videomode *mode);extern int fb_mode_is_equal(const struct fb_videomode *mode1, const struct fb_videomode *mode2);extern int fb_add_videomode(const struct fb_videomode *mode, struct list_head *head);extern void fb_delete_videomode(const struct fb_videomode *mode, struct list_head *head);extern const struct fb_videomode *fb_match_mode(const struct fb_var_screeninfo *var, struct list_head *head);extern const struct fb_videomode *fb_find_best_mode(const struct fb_var_screeninfo *var, struct list_head *head);extern const struct fb_videomode *fb_find_nearest_mode(const struct fb_videomode *mode, struct list_head *head);extern void fb_destroy_modelist(struct list_head *head);extern void fb_videomode_to_modelist(const struct fb_videomode *modedb, int num, struct list_head *head);extern const struct fb_videomode *fb_find_best_display(const struct fb_monspecs *specs, struct list_head *head);/* drivers/video/fbcmap.c */extern int fb_alloc_cmap(struct fb_cmap *cmap, int len, int transp);extern void fb_dealloc_cmap(struct fb_cmap *cmap);extern int fb_copy_cmap(const struct fb_cmap *from, struct fb_cmap *to);extern int fb_cmap_to_user(const struct fb_cmap *from, struct fb_cmap_user *to);extern int fb_set_cmap(struct fb_cmap *cmap, struct fb_info *fb_info);extern int fb_set_user_cmap(struct fb_cmap_user *cmap, struct fb_info *fb_info);extern const struct fb_cmap *fb_default_cmap(int len);extern void fb_invert_cmaps(void);struct fb_videomode { const char *name; /* optional */ u32 refresh; /* optional */ u32 xres; u32 yres; u32 pixclock; u32 left_margin; u32 right_margin; u32 upper_margin; u32 lower_margin; u32 hsync_len; u32 vsync_len; u32 sync; u32 vmode; u32 flag;};extern const char *fb_mode_option;extern const struct fb_videomode vesa_modes[];struct fb_modelist { struct list_head list; struct fb_videomode mode;};extern int fb_find_mode(struct fb_var_screeninfo *var, struct fb_info *info, const char *mode_option, const struct fb_videomode *db, unsigned int dbsize, const struct fb_videomode *default_mode, unsigned int default_bpp);#endif /* __KERNEL__ */#endif /* _LINUX_FB_H */ 1 0
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