/* * drivers/video/dm64xxfb.c * * Framebuffer driver for Texas Instruments DM644x display controller. * * Copyright (C) 2005 Texas Instruments, Inc. * Rishi Bhattacharya <support@ti.com> * * Leveraged from the framebuffer driver for OMAP24xx  * written by Andy Lowe (source@mvista.com) * Copyright (C) 2004 MontaVista Software, Inc. * * This file is licensed under the terms of the GNU General Public License * version 2. This program is licensed "as is" without any warranty of any * kind, whether express or implied. */#include <linux/module.h>#include <linux/kernel.h>#include <linux/errno.h>#include <linux/string.h>#include <linux/mm.h>#include <linux/tty.h>#include <linux/slab.h>//包含內存分配函數，原來的malloc.h不存在#include <linux/delay.h>#include <linux/fb.h>#include <linux/init.h>#include <linux/dma-mapping.h>#include <linux/interrupt.h>#include <asm/irq.h>#include <asm/uaccess.h>#include <video/davincifb.h>


/*為了定義 pinmux0和pinmux1而包含以下的文件,調試時可根據結果刪減文件*/
/*
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/major.h>
#include <linux/root_dev.h>

#include <asm/setup.h>
#include <asm/semaphore.h>
#include <asm/hardware/clock.h>
#include <asm/io.h>
#include <asm/mach-types.h>

#include <asm/mach/arch.h>
#include <asm/mach/map.h>

#include <asm/arch/hardware.h>
//#include "clock.h"
#define PINMUX0     __REG(0x01c40000)
#define PINMUX1     __REG(0x01c40004)
///////////////////////////////////////////////////

*/


#define PINMUX0     IO_ADDRESS(0x01c40000)
#define PINMUX1     IO_ADDRESS(0x01c40004)

#define LCDS 7#define PLL IO_ADDRESS(0x01c40c00)#define PLLM (PLL+0x110)      //PLL的默認值是12，與文檔中不一樣#define PLLDIV1 (PLL+0x118)   //PLLDIV1的默認值是5，與文檔中不一樣#define PLLDIV2 (PLL+0x11c)#define POSTDIV (PLL+0x128)#define PLLCTL (PLL+0x100)#define EDMA IO_ADDRESS(0x01c00000)#define EER (EDMA+0x1020)#define EERH (EDMA+0x1024)#define EECR (EDMA+0x1028)#define EECRH (EDMA+0x102c)#define EESR (EDMA+0x1030)#define EESRH (EDMA+0x1034)#define DDR IO_ADDRESS(0x20000000)#define DDR_SDRSTAT (DDR+0x04)#define DDR_SDBCR      (DDR+0x08)#define  DDR_SDRCR (DDR+0x0c)#define DDR_DDRPHYCR (DDR+0xe4)/* Output Format Selection  */#define COMPOSITE_OUTPUT//#define SVIDEO_OUTPUT//#define COMPONENT_OUTPUT//#define	DEBUG#ifdef 	DEBUG#define	DBGENTER	printk("Entered %s\n", __FUNCTION__)#define	DBGEXIT		printk("Exited %s\n", __FUNCTION__)#define	RETURN(x)						\do {								\	int __ret = (x);					\	printk("Exited %s : ret %d\n", __FUNCTION__, __ret);	\	return __ret; 						\} while(0)#else#define	DBGENTER#define	DBGEXIT#define	RETURN(x)	return (x)#endif//#define MULTIPLE_BUFFERING	1 #ifdef MULTIPLE_BUFFERING#define DOUBLE_BUF	2#define TRIPLE_BUF	3#else#define DOUBLE_BUF	1#define TRIPLE_BUF	1#endif/* * display controller register I/O routines */static __inline__ u32dispc_reg_in(u32 offset)       //把offset地址中的值讀入{	return(inl(offset));}static __inline__ u32dispc_reg_out(u32 offset, u32 val)  //把val寫到offset地址中{	/* outw(val, offset);  */	outl(val, offset);	return(val);}static __inline__ u32dispc_reg_merge(u32 offset, u32 val, u32 mask)//寄存器值的合并，把val中mask指定的位寫入到寄存器中{	u32 addr = offset;	u32 new_val = (inl(addr) & ~mask) | (val & mask); 	outl(new_val, addr);                   	return(new_val);}/* There are 4 framebuffers, each represented by an fb_info and  * a dm_win_info structure  */#define DRIVER		"dm64xxfb"
#define OSD0_FBNAME	"dm_osd0_fb"#define OSD1_FBNAME	"dm_osd1_fb"#define VID0_FBNAME	"dm_vid0_fb"#define VID1_FBNAME	"dm_vid1_fb"/* usage:	if (is_win(info->fix.id, OSD0)) ... */#define is_win(name, x) ((strcmp(name, x ## _FBNAME) == 0) ? 1 : 0)  struct dm_win_info {					//窗口的信息結構	struct fb_info	info;			//此窗口的fb_info信息	/* X and Y position */
	unsigned int x, y; 				//x,y的坐標
	
	/* framebuffer area */
	dma_addr_t fb_base_phys;		//ram 的物理地址
	unsigned long fb_base;			//fb的起始地址
	unsigned long fb_size;			//fb的大小

	u32 pseudo_palette[17];

	/* flag to identify if framebuffer area is fixed already or not */
	int alloc_fb_mem;	

	struct dm_info *dm;				//
};static struct dm_info {	struct dm_win_info *osd0;	struct dm_win_info *osd1;	
	struct dm_win_info *vid0;	
	struct dm_win_info *vid1;	/* to map the registers */	dma_addr_t mmio_base_phys;	unsigned long mmio_base;	unsigned long mmio_size;	wait_queue_head_t vsync_wait;	unsigned long vsync_cnt;	int timeout;	/* this is the function that configures the output device (NTSC/PAL/LCD)	 * for the required output format (composite/s-video/component/rgb)	 */ 	void (*output_device_config)(int on);} dm;static struct fb_ops dm64xxfb_ops;#define BASEX		0x25 //80#define BASEY		0x15#define NTSCPAL  LCDS#define DISP_XRES	1280#define DISP_YRES	1024#define DISP_MEMY	1024#ifdef  COMPOSITE_OUTPUT#define OUTPUT COMPOSITE#endif#ifdef  SVIDEO_OUTPUT#define OUTPUT SVIDEO#endif#ifdef  COMPONENT_OUTPUT#define OUTPUT COMPONENT#endif/* Random value chosen for now. Should be within the panel's supported range */#define LCD_PANEL_CLOCK	18518	//這個還沒弄懂!!!/* All window widths have to be rounded up to a multiple of 32 bytes *//* The OSD0 window has to be always within VID0. Plus, since it is in RGB565  * mode, it _cannot_ overlap with VID1.  * For defaults, we are setting the OSD0 window to be displayed in the top  * left quadrant of the screen, and the VID1 in the bottom right quadrant.  * So the default 'xres' and 'yres' are set to  half of the screen width and  * height respectively. Note however that the framebuffer size is allocated  * for the full screen size so the user can change the 'xres' and 'yres' by  * using the FBIOPUT_VSCREENINFO ioctl within the limits of the screen size. */#define round_32(width)	((((width) + 31) / 32) * 32 ) //把width取到32的整數倍		#define OSD0_XRES	round_32((720)*16/8) * 8/16	/* pixels */   //round_32((DISP_XRES)*16/8)是round后水平方向含有的byte數#define OSD0_YRES	480 //DISP_YRES  //垂直方向的分辨率，不用是32的整數倍#define OSD0_FB_PHY	0#define OSD0_FB_SIZE	(round_32((720)*16/8) * DISP_MEMY * DOUBLE_BUF) //FB的大小，水平方向的byte數×DISP_MEMY×buffer的個數			/* 16 bpp, Double buffered */static struct fb_var_screeninfo osd0_default_var = {	.xres		= 256;//OSD0_XRES,					//x方向可見分辨率	.yres		= 200;//OSD0_YRES,					//y方向可見分辨率	.xres_virtual	= OSD0_XRES,
	.yres_virtual	= OSD0_YRES * DOUBLE_BUF,    //y方向的虛擬（存儲）分辨率	.xoffset	= 0,   //可見畫面與可顯示畫面的偏移	.yoffset	= 0,	.bits_per_pixel	= 16,			//每個象素有16bit	.grayscale	= 0,				//灰度平衡 0	.red		= {11, 5, 0},     /*RGB 565 模式*/	.green		= { 5, 6, 0},	.blue		= { 0, 5, 0},	.transp		= { 0, 0, 0},	.nonstd		= 0,	.activate	= FB_ACTIVATE_NOW,	.height		= -1,	.width		= -1,	.accel_flags	= 0,	.pixclock	= LCD_PANEL_CLOCK, /* picoseconds */	.left_margin	= 40,		/* pixclocks */	.right_margin	= 4,		/* pixclocks */	.upper_margin	= 8,		/* line clocks */	.lower_margin	= 2,		/* line clocks */	.hsync_len	= 4,		/* pixclocks */
	.vsync_len	= 2,		/* line clocks */	.sync		= 0,	.vmode		= FB_VMODE_INTERLACED,	.reserved[0]	= 0,		/* X position */	.reserved[1] = 0,		/* Y position */	//.reserved[3]	= 0,		/* Zoom */};/* Using the full screen for OSD1 by default */
#define OSD1_XRES	round_32(DISP_XRES*4/8) * 8/4	/* pixels */
#define OSD1_YRES	DISP_YRES
#define OSD1_FB_PHY	0
#define OSD1_FB_SIZE	(round_32(DISP_XRES*4/8) * DISP_MEMY * DOUBLE_BUF)
			
static struct fb_var_screeninfo osd1_default_var = {
	.xres		= DISP_XRES,	.yres		= OSD1_YRES,	.xres_virtual	= OSD1_XRES,	.yres_virtual	= OSD1_YRES * DOUBLE_BUF,	.xoffset	= 0,	.yoffset	= 0,	.bits_per_pixel	= 4,	.activate	= FB_ACTIVATE_NOW,	.accel_flags	= 0,	.pixclock	= LCD_PANEL_CLOCK, /* picoseconds */	.vmode		= FB_VMODE_INTERLACED,	.reserved[0]	= 0,		/* X position */	.reserved[1]	= 0,		/* Y position */	//.reserved[3]	= 0,		/* Zoom */};/* Using the full screen for VID0 by default */#define VID0_XRES	(round_32((DISP_XRES)*16/8) * 8/16)	/* pixels */#define VID0_YRES	DISP_YRES#define VID0_FB_PHY	0#define VID0_FB_SIZE	(round_32((DISP_XRES)*16/8) * DISP_MEMY * TRIPLE_BUF)static struct fb_var_screeninfo vid0_default_var = {	.xres		= VID0_XRES,	.yres		= VID0_YRES,	.xres_virtual	= VID0_XRES,	.yres_virtual	= VID0_YRES * TRIPLE_BUF ,		////////////	.xoffset	= 0,	.yoffset	= 0,	.bits_per_pixel	= 16,	.activate	= FB_ACTIVATE_NOW,	.height		= -1,	.width		= -1,	.left_margin	= 20,		/* pixclocks */	.right_margin	= 4,		/* pixclocks */	.upper_margin	= 8,		/* line clocks */	.lower_margin	= 2,		/* line clocks */	.hsync_len	= 4,		/* pixclocks */
	.vsync_len	= 2,		/* line clocks */	.sync		= 0,	.accel_flags	= 0,	.pixclock	= LCD_PANEL_CLOCK, /* picoseconds */	.vmode		= FB_VMODE_INTERLACED,	.reserved[0]	= 0,		/* X position */	.reserved[1]	= 0,		/* Y position */	//.reserved[3]	= 0,		/* Zoom */};/* Using the bottom right quadrant of the screen screen for VID1 by default,  * but keeping the framebuffer allocated for the full screen, so the user can  * change the 'xres' and 'yres' later using the FBIOPUT_VSCREENINFO ioctl.  */#define VID1_BPP	32   //*****16	/* Video1 can be in YUV or RGB888 format */#define VID1_XRES (round_32((DISP_XRES)*32/8) * 8/32)	/* pixels */#define VID1_YRES DISP_YRES#define VID1_FB_PHY	0#define VID1_FB_SIZE (round_32((DISP_XRES)*32/8) * DISP_MEMY * TRIPLE_BUF)static struct fb_var_screeninfo vid1_default_var = {	.xres		= VID1_XRES,	.yres		= VID1_YRES,	.xres_virtual	= VID1_XRES,	.yres_virtual	= VID1_YRES * TRIPLE_BUF,	.xoffset	= 0,	.yoffset	= 0,		.red={16,8,0},	.green={8,8,0},	.blue={0,8,0},	.transp		= { 0, 0, 0},	.nonstd		= 0,	.grayscale=0,	.height		= -1,	.width		= -1,	.left_margin	= 20,		/* pixclocks */	.right_margin	= 4,		/* pixclocks */	.upper_margin	= 8,		/* line clocks */	.lower_margin	= 2,		/* line clocks */	.hsync_len	= 4,		/* pixclocks */
	.vsync_len	= 2,		/* line clocks */	.sync		= 0,		.bits_per_pixel	= VID1_BPP,	.activate	= FB_ACTIVATE_NOW,	.accel_flags	= 0,	.pixclock	= LCD_PANEL_CLOCK, /* picoseconds */	.vmode		= FB_VMODE_INTERLACED,	//.reserved[0]	= 256 + 16, /* X position */ //相對于OSD0窗口的位置
	//.reserved[1]	= 200 + 16, /* Y position */	//.reserved[3]	= 0,		/* Zoom */};#define	x_pos(w)	((w)->x)#define	y_pos(w)	((w)->y)#define	zoom(w)		((w)->zoom)/*#define	x_pos(v)	((v)->reserved[0])#define	y_pos(v)	((v)->reserved[1])#define	zoom(v)		((v)->reserved[2])*/static struct dmparams_t {        u8 output;        u8 format;        u8 windows;      /* bitmap flag based on VID0, VID1, OSD0, OSD1                          * definitions in header file */        u32 vid0_xres;        u32 vid0_yres;        u32 vid0_xpos;        u32 vid0_ypos;        u32 vid1_xres;        u32 vid1_yres;        u32 vid1_xpos;        u32 vid1_ypos;        u32 osd0_xres;
        u32 osd0_yres;        u32 osd0_xpos;        u32 osd0_ypos;        u32 osd1_xres;        u32 osd1_yres;        u32 osd1_xpos;        u32 osd1_ypos;} dmparams =    {                        NTSCPAL,                        /* output */                        OUTPUT,             /* format */                        (1<<VID0)|(1<<VID1)|(1<<OSD0)&~(1<<OSD1), /*設置窗口的使能與否*/                                                   /* windows registered */								VID0_XRES, VID0_YRES, 0, 0,                        //712,480,256+16,200+16,         /* vid0 size and position */                        VID1_XRES, VID1_YRES, 0, 0,         /* vid1 size and position */								//720 ,  480  , 0 ,   0 ,								//712 ,480  ,16 ,  0 ,                        256,200, 0,0,         /* osd0 size and position */                        OSD1_XRES,OSD1_YRES, 0, 0,         /* osd1 size and position */                };/* Must do checks against the limits of the output device */static int dm64xx_venc_check_mode(const struct dm_win_info *w, 				  const struct fb_var_screeninfo *var){	DBGENTER;	RETURN(0);}static irqreturn_t dm64xxfb_isr(int irq, void *arg, struct pt_regs *regs){