tridentfb.c

S3C44B0X下的LCD （framebuffer）驱动资料与相关代码

/*
 * Frame buffer driver for Trident Blade and Image series
 *
 * Copyright 2001,2002 - Jani Monoses   <[e-mail]>
 *
 *
 * CREDITS:(in order of appearance)
 * 	skeletonfb.c by Geert Uytterhoeven and other fb code in drivers/video
 * 	Special thanks ;) to Mattia Crivellini <[e-mail]>
 * 	much inspired by the XFree86 4.x Trident driver sources by Alan Hourihane
 * 	the FreeVGA project
 *	Francesco Salvestrini <[e-mail]> XP support,code,suggestions
 * TODO:
 * 	timing value tweaking so it looks good on every monitor in every mode
 *	TGUI acceleration	
 */

#include <linux/config.h>
#include <linux/module.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/pci.h>

#include <video/fbcon.h>
#include <video/fbcon-cfb8.h>
#include <video/fbcon-cfb16.h>
#include <video/fbcon-cfb24.h>
#include <video/fbcon-cfb32.h>

#include "tridentfb.h"

#define VERSION		"0.7.5"

struct tridentfb_par {
	struct fb_var_screeninfo var;
	int bpp;
	int hres;
	int vres;
	int linelength;
	int vclk;		//in MHz

	int vtotal;
	int vdispend;
	int vsyncstart;
	int vsyncend;
	int vblankstart;
	int vblankend;

	int htotal;
	int hdispend;
	int hsyncstart;
	int hsyncend;
	int hblankstart;
	int hblankend;
};

struct tridentfb_info {
	struct fb_info_gen gen;
	unsigned long fbmem_virt;	//framebuffer virtual memory address
	unsigned long fbmem;		//framebuffer physical memory address
	unsigned int memsize;		//size of fbmem
	unsigned long io;		//io space address
	unsigned long io_virt;		//iospace virtual memory address
	unsigned int nativex;		//flat panel xres
	struct tridentfb_par currentmode;
	unsigned char eng_oper;		//engine operation...
};

static struct fb_ops tridentfb_ops;

static struct tridentfb_info fb_info;
static struct display disp;

static struct { unsigned char red,green,blue,transp; } palette[256];

static struct fb_var_screeninfo default_var;

static char * tridentfb_name = "Trident";

static int chip_id;

static int defaultaccel;
static int displaytype;

static int pseudo_pal[16];

/* defaults which are normally overriden by user values */

/* video mode */
static char * mode = "640x480";
static int bpp = 8;

static int noaccel;

static int center;
static int stretch;

static int fp;
static int crt;

static int memsize;
static int memdiff;
static int nativex;


MODULE_PARM(mode,"s");
MODULE_PARM(bpp,"i");
MODULE_PARM(center,"i");
MODULE_PARM(stretch,"i");
MODULE_PARM(noaccel,"i");
MODULE_PARM(memsize,"i");
MODULE_PARM(memdiff,"i");
MODULE_PARM(nativex,"i");
MODULE_PARM(fp,"i");
MODULE_PARM(crt,"i");

static int chip3D;
int is3Dchip(int id)
{
	return 	((id == BLADE3D) || (id == CYBERBLADEE4) ||
		 (id == CYBERBLADEi7) || (id == CYBERBLADEi7D) ||
		 (id == CYBER9397) || (id == CYBER9397DVD) ||
		 (id == CYBER9520) || (id == CYBER9525DVD) ||
		 (id == IMAGE975) || (id == IMAGE985) ||
		 (id == CYBERBLADEi1) || (id == CYBERBLADEi1D) ||
		 (id ==	CYBERBLADEAi1) || (id == CYBERBLADEAi1D) ||
		 (id ==	CYBERBLADEXPm8) || (id == CYBERBLADEXPm16) ||
		 (id ==	CYBERBLADEXPAi1));
}

#define CRT 0x3D0		//CRTC registers offset for color display

#ifndef TRIDENT_MMIO
	#define TRIDENT_MMIO 1
#endif

#if TRIDENT_MMIO
	#define t_outb(val,reg)	writeb(val,fb_info.io_virt + reg)
	#define t_inb(reg)	readb(fb_info.io_virt + reg)
#else
	#define t_outb(val,reg) outb(val,reg)
	#define t_inb(reg) inb(reg)
#endif


static struct accel_switch {
	void (*init_accel)(int,int);
	void (*wait_engine)(void);
	void (*fill_rect)(int,int,int,int,int);
	void (*copy_rect)(int,int,int,int,int,int);
} *acc;

#define writemmr(r,v)	writel(v, fb_info.io_virt + r)
#define readmmr(r)	readl(fb_info.io_virt + r)



/*
 * Blade specific acceleration.
 */

#define point(x,y) ((y)<<16|(x))
#define STA	0x2120
#define CMD	0x2144
#define ROP	0x2148
#define CLR	0x2160
#define SR1	0x2100
#define SR2	0x2104
#define DR1	0x2108
#define DR2	0x210C

#define REPL(x)	x = x | x<<16
#define ROP_S	0xCC

static void blade_init_accel(int pitch,int bpp)
{
	int v1 = (pitch>>3)<<20;
	int tmp = 0,v2;
	switch (bpp) {
		case 8:tmp = 0;break;
		case 15:tmp = 5;break;
		case 16:tmp = 1;break;
		case 24:
		case 32:tmp = 2;break;
	}
	v2 = v1 | (tmp<<29);
	writemmr(0x21C0,v2);
	writemmr(0x21C4,v2);
	writemmr(0x21B8,v2);
	writemmr(0x21BC,v2);
	writemmr(0x21D0,v1);
	writemmr(0x21D4,v1);
	writemmr(0x21C8,v1);
	writemmr(0x21CC,v1);
	writemmr(0x216C,0);
}

static void blade_wait_engine(void)
{
	while(readmmr(STA) & 0xFA800000);
}

static void blade_fill_rect(int x,int y,int w,int h,int c)
{
	writemmr(CLR,c);
	writemmr(ROP,ROP_S);
	writemmr(CMD,0x20000000|1<<19|1<<4|2<<2);

	writemmr(DR1,point(x,y));
	writemmr(DR2,point(x+w-1,y+h-1));
}

static void blade_copy_rect(int x1,int y1,int x2,int y2,int w,int h)
{
	int s1,s2,d1,d2;
	int direction = 2;
	s1 = point(x1,y1);
	s2 = point(x1+w-1,y1+h-1);
	d1 = point(x2,y2);
	d2 = point(x2+w-1,y2+h-1);

	if ((y1 > y2) || ((y1 == y2) && (x1 > x2)))
			direction = 0;


	writemmr(ROP,ROP_S);
	writemmr(CMD,0xE0000000|1<<19|1<<4|1<<2|direction);

	writemmr(SR1,direction?s2:s1);
	writemmr(SR2,direction?s1:s2);
	writemmr(DR1,direction?d2:d1);
	writemmr(DR2,direction?d1:d2);
}

static struct accel_switch accel_blade = {
	blade_init_accel,
	blade_wait_engine,
	blade_fill_rect,
	blade_copy_rect,
};


/*
 * BladeXP specific acceleration functions
 */

#define ROP_P 0xF0
#define masked_point(x,y) ((y & 0xffff)<<16|(x & 0xffff))

static void xp_init_accel(int pitch,int bpp)
{
	int tmp = 0,v1;
	unsigned char x = 0;

	switch (bpp) {
		case 8:  x = 0; break;
		case 16: x = 1; break;
		case 24: x = 3; break;
		case 32: x = 2; break;
	}

	switch (pitch << (bpp >> 3)) {
		case 8192:
		case 512:  x |= 0x00; break;
		case 1024: x |= 0x04; break;
		case 2048: x |= 0x08; break;
		case 4096: x |= 0x0C; break;
	}

	t_outb(x,0x2125);

	fb_info.eng_oper = x | 0x40;

	switch (bpp) {
		case 8:  tmp = 18; break;
		case 15:
		case 16: tmp = 19; break;
		case 24:
		case 32: tmp = 20; break;
	}

	v1 = pitch << tmp;

	writemmr(0x2154,v1);
	writemmr(0x2150,v1);
	t_outb(3,0x2126);
}

static void xp_wait_engine(void)
{
	int busy;
	int count, timeout;

	count = 0;
	timeout = 0;
	for (;;) {
		busy = t_inb(STA) & 0x80;
		if (busy != 0x80)
			return;
		count++;
		if (count == 10000000) {
			/* Timeout */
			count = 9990000;
			timeout++;
			if (timeout == 8) {
				/* Reset engine */
				t_outb(0x00, 0x2120);
				return;
			}
		}
	}
}

static void xp_fill_rect(int x,int y,int w,int h,int c)
{
	writemmr(0x2127,ROP_P);
	writemmr(0x2158,c);
	writemmr(0x2128,0x4000);
	writemmr(0x2140,masked_point(h,w));
	writemmr(0x2138,masked_point(y,x));
	t_outb(0x01,0x2124);
        t_outb(fb_info.eng_oper,0x2125);
}

static void xp_copy_rect(int x1,int y1,int x2,int y2,int w,int h)
{
	int direction;
	int x1_tmp, x2_tmp, y1_tmp, y2_tmp;

	direction = 0x0004;
	
	if ((x1 < x2) && (y1 == y2)) {
		direction |= 0x0200;
		x1_tmp = x1 + w - 1;
		x2_tmp = x2 + w - 1;
	} else {
		x1_tmp = x1;
		x2_tmp = x2;
	}
  
	if (y1 < y2) {
		direction |= 0x0100;
		y1_tmp = y1 + h - 1;
		y2_tmp = y2 + h - 1;
  	} else {
		y1_tmp = y1;
		y2_tmp = y2;
	}

	writemmr(0x2128,direction);	
	t_outb(ROP_S,0x2127);
	writemmr(0x213C,masked_point(y1_tmp,x1_tmp));
	writemmr(0x2138,masked_point(y2_tmp,x2_tmp));
	writemmr(0x2140,masked_point(h,w));
	t_outb(0x01,0x2124);
}

static struct accel_switch accel_xp = {
  	xp_init_accel,
	xp_wait_engine,
	xp_fill_rect,
	xp_copy_rect,
};


/*
 * Image specific acceleration functions
 */
static void image_init_accel(int pitch,int bpp)
{
	int tmp = 0;
   	switch (bpp) {
		case 8:tmp = 0;break;
		case 15:tmp = 5;break;
		case 16:tmp = 1;break;
		case 24:
		case 32:tmp = 2;break;
	}
	writemmr(0x2120, 0xF0000000);
	writemmr(0x2120, 0x40000000|tmp);
	writemmr(0x2120, 0x80000000);
	writemmr(0x2144, 0x00000000);
	writemmr(0x2148, 0x00000000);
	writemmr(0x2150, 0x00000000);
	writemmr(0x2154, 0x00000000);
	writemmr(0x2120, 0x60000000|(pitch<<16) |pitch);
	writemmr(0x216C, 0x00000000);
	writemmr(0x2170, 0x00000000);
	writemmr(0x217C, 0x00000000);
	writemmr(0x2120, 0x10000000);
	writemmr(0x2130, (2047 << 16) | 2047);
}

static void image_wait_engine(void)
{
	while(readmmr(0x2164) & 0xF0000000);
}

static void image_fill_rect(int x,int y,int w,int h,int c)
{
	writemmr(0x2120,0x80000000);
	writemmr(0x2120,0x90000000|ROP_S);

	writemmr(0x2144,c);

	writemmr(DR1,point(x,y));
	writemmr(DR2,point(x+w-1,y+h-1));

	writemmr(0x2124,0x80000000|3<<22|1<<10|1<<9);
}

static void image_copy_rect(int x1,int y1,int x2,int y2,int w,int h)
{
	int s1,s2,d1,d2;
	int direction = 2;
	s1 = point(x1,y1);
	s2 = point(x1+w-1,y1+h-1);
	d1 = point(x2,y2);
	d2 = point(x2+w-1,y2+h-1);

	if ((y1 > y2) || ((y1 == y2) && (x1 >x2)))
			direction = 0;

	writemmr(0x2120,0x80000000);
	writemmr(0x2120,0x90000000|ROP_S);

	writemmr(SR1,direction?s2:s1);
	writemmr(SR2,direction?s1:s2);
	writemmr(DR1,direction?d2:d1);
	writemmr(DR2,direction?d1:d2);
	writemmr(0x2124,0x80000000|1<<22|1<<10|1<<7|direction);
}


static struct accel_switch accel_image = {
	image_init_accel,
	image_wait_engine,
	image_fill_rect,
	image_copy_rect,
};

/*
 * Accel functions called by the upper layers
 */

static void trident_bmove (struct display *p, int sy, int sx,
				int dy, int dx, int height, int width)
{
	sx *= fontwidth(p);
	dx *= fontwidth(p);
	width *= fontwidth(p);
	sy *= fontheight(p);
	dy *= fontheight(p);
	height *= fontheight(p);
	acc->copy_rect(sx,sy,dx,dy,width,height);
	acc->wait_engine();
}
static void trident_clear_helper (int c, struct display *p,
				int sy, int sx, int height, int width)
{
	sx *= fontwidth(p);
	sy *= fontheight(p);
	width *= fontwidth(p);
	height *= fontheight(p);
	acc->fill_rect(sx,sy,width,height,c);
	acc->wait_engine();
}


#ifdef FBCON_HAS_CFB8
static void trident_8bpp_clear (struct vc_data *conp, struct display *p,
				int sy, int sx, int height, int width)
{
	int c;
	c = attr_bgcol_ec(p,conp) & 0xFF;
	c |= c<<8;
	c |= c<<16;
	trident_clear_helper(c,p,sy,sx,height,width);
}

static struct display_switch trident_8bpp = {
	setup:		fbcon_cfb8_setup,
	bmove:		trident_bmove,
	clear:		trident_8bpp_clear,
	putc:		fbcon_cfb8_putc,
	putcs:		fbcon_cfb8_putcs,
	revc:		fbcon_cfb8_revc,
	clear_margins:	fbcon_cfb8_clear_margins,
	fontwidthmask:	FONTWIDTH (4) | FONTWIDTH (8) | FONTWIDTH (12) | FONTWIDTH (16)
};
#endif
#ifdef FBCON_HAS_CFB16
static void trident_16bpp_clear (struct vc_data *conp, struct display *p,
				int sy, int sx, int height, int width)
{
	int c;
	c = ((u16*)p->dispsw_data)[attr_bgcol_ec(p,conp)];
	c = c | c<<16;
	trident_clear_helper(c,p,sy,sx,height,width);
}

static struct display_switch trident_16bpp = {
	setup:		fbcon_cfb16_setup,