xref: /src/sys/arch/mac68k/nubus/nubus.c

/*-
 * Copyright (C) 1993	Allen K. Briggs, Chris P. Caputo,
 *			Michael L. Finch, Bradley A. Grantham, and
 *			Lawrence A. Kesteloot
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the Alice Group.
 * 4. The names of the Alice Group or any of its members may not be used
 *    to endorse or promote products derived from this software without
 *    specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE ALICE GROUP ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE ALICE GROUP BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */
#ident "$Id: nubus.c,v 1.1 1993/09/29 06:09:28 briggs Exp $"

/*
	MF 8-24-93 first hack at a real nubus driver
*/

#include "sys/param.h"
#include "sys/systm.h"
#include "../include/cpu.h"

#include "nubus.h"


/* TODO:
	be able to do "memcpy"s from the board, then i won't
	have to fill in structures by hand.

	get rid of extra crap calls that are useless

	I think the directory stuff is bogus, I need to find
        that other magic resource that tells me fancy stuff,
        I could be wrong.


*/


struct dir *getRsrcByNum(struct slot *Slot,struct dir *p,int num,struct dir *out,int max);
int print_rsrcinfo(struct slot *Slot,struct dir *p);
char *GetStringInfo(struct slot *Slot,unsigned char *data1,char *space,int len);
int printTree(struct slot *Slot,struct dir *root);
long GetLongInfo(struct slot *,unsigned char *data);
int FindMagic(unsigned long *data);
int GetHeader(struct slot *Slot,unsigned long pos);
unsigned char *IncPtr(struct slot *Slot,unsigned char *p,int size);
char GetByteInfo(struct slot *Slot,unsigned char *data);
int GetRsrcs(struct slot *Slot,unsigned char *p,struct dir *Dir,int maxdir);
unsigned char *getDataAtRsrc(struct slot *Slot,struct dir *p,int num);
short GetShortInfo(struct slot *Slot,unsigned char *data);

/* this is the main I used in macos to get stuff out */
#if 0
main()
{

	unsigned long *rawImage;
	struct imagedata image;
	struct dir *Dir;
	struct dir dirSpace[15];
	struct dir dirSpace2[10];
	unsigned long length;
	unsigned long offset;
	unsigned long nextoffset;
	int pos,i;
	unsigned char *data;
	struct slot Slot;

//	firstHeader=(char *)0xbfffff-40;

	data=(char *)SLOTADDR-100;

	for(i=0;i<100;i++)
		if (Slot.size=FindMagic( (long *)(data+i) ) )
		{
			/* printf("magic found at i=%d\n",i); */
			GetHeader(&Slot,SLOTADDR-100+i);
			break;
		}




	printf("main directory\n");
	print_rsrcinfo(&Slot,Slot.mainDir );

	Dir=getRsrcByNum(&Slot,Slot.mainDir,128,dirSpace,15);

	printf("image directory\n");
	print_rsrcinfo(&Slot,Dir);

	printTree(&Slot,Slot.mainDir);

// get image param stuff
	Dir=getRsrcByNum(&Slot,Dir,128,dirSpace2,10);

	/* hopefully video mode params */
	rawImage=getDataAtRsrc(&Slot,Dir,1);

	image.whatTheHellIsThis=GetLongInfo(&Slot,rawImage);
	rawImage=IncPtr(&Slot,rawImage,4);

	image.offset=GetLongInfo(&Slot,rawImage);
	rawImage=IncPtr(&Slot,rawImage,4);

	image.rowbytes=GetShortInfo(&Slot,rawImage);
	rawImage=IncPtr(&Slot,rawImage,2);

	image.top=GetShortInfo(&Slot,rawImage);
	rawImage=IncPtr(&Slot,rawImage,2);

	image.left=GetShortInfo(&Slot,rawImage);
	rawImage=IncPtr(&Slot,rawImage,2);

	image.bottom=GetShortInfo(&Slot,rawImage);
	rawImage=IncPtr(&Slot,rawImage,2);

	image.right=GetShortInfo(&Slot,rawImage);
	rawImage=IncPtr(&Slot,rawImage,2);

	image.version=GetShortInfo(&Slot,rawImage);
	rawImage=IncPtr(&Slot,rawImage,2);

	image.packType=GetShortInfo(&Slot,rawImage);
	rawImage=IncPtr(&Slot,rawImage,2);

	image.packSize=GetShortInfo(&Slot,rawImage);
	rawImage=IncPtr(&Slot,rawImage,2);

	image.hRes=GetLongInfo(&Slot,rawImage);
	rawImage=IncPtr(&Slot,rawImage,4);

	image.vRes=GetLongInfo(&Slot,rawImage);
	rawImage=IncPtr(&Slot,rawImage,4);

	image.pixelType=GetShortInfo(&Slot,rawImage);
	rawImage=IncPtr(&Slot,rawImage,2);

	image.pixelSize=GetShortInfo(&Slot,rawImage);
	rawImage=IncPtr(&Slot,rawImage,2);


}
#endif /* main */

int GetHeader(struct slot *Slot,unsigned long pos)
{
	/* the pos passed in is the pos that the magic testvalue was found at */
	unsigned char *p;
	unsigned char *dirBase;

	switch (Slot->size)
	{
		case 1:	/* char */
			pos-=14;
			break;
		case 2:
			pos-=28;
			break;
		case 4:
			pos-=56;
			break;
	}

	p=(unsigned char *)pos;

	Slot->head.offset=GetLongInfo(Slot,p);
	p=IncPtr(Slot,p,4);

	Slot->head.length=GetLongInfo(Slot,p);
	p=IncPtr(Slot,p,4);

	Slot->head.crc=GetLongInfo(Slot,p);
	p=IncPtr(Slot,p,4);

	Slot->head.romrev=GetByteInfo(Slot,p);
	p=IncPtr(Slot,p,1);

	Slot->head.format=GetByteInfo(Slot,p);
	p=IncPtr(Slot,p,1);

	Slot->head.tst=GetLongInfo(Slot,p);
	p=IncPtr(Slot,p,4);

	Slot->head.reserved=GetByteInfo(Slot,p);
	p=IncPtr(Slot,p,1);

/* byte lanes should be used instead of size, this hasn't bitten me yet */
	Slot->head.bytelane=GetByteInfo(Slot,p);
	p=IncPtr(Slot,p,1);

	dirBase=(unsigned char *)(pos-(Slot->head.length-sizeof(struct header))*Slot->size);
	GetRsrcs(Slot,dirBase,Slot->mainDir,15);
	return 0;
}


printTree(struct slot *Slot,struct dir *root)
{
	struct dir *b;
	unsigned char *c;
	struct dir *d;
	unsigned char *e;
	struct dir *f;
	unsigned char *g;
	struct dir *h;
	unsigned char *i;
	unsigned char *j;
	unsigned char *k;
	struct dir bSpace[15];
	struct dir cSpace[15];
	struct dir dSpace[15];
	struct dir fSpace[15];
	struct dir hSpace[15];
	char space[40];
/* to get a good idea of what is happening here you should get the
"slots" program from apple dts, it is so cool.  Its the next
best thing to actual docs, which i didn't have...
*/

	b=getRsrcByNum(Slot,root,1,bSpace,15);
	c=getDataAtRsrc(Slot,b,2);
	d=getRsrcByNum(Slot,b,0x24,dSpace,15);

	e=getDataAtRsrc(Slot,d,1);

	f=getRsrcByNum(Slot,root,0x80,fSpace,15);
	g=getDataAtRsrc(Slot,f,2);
	j=getDataAtRsrc(Slot,f,0x0a);
	k=getDataAtRsrc(Slot,f,0x0b);

	h=getRsrcByNum(Slot,root,0xa0,hSpace,15);
	i=getDataAtRsrc(Slot,h,2);

	printf("A\n");
	print_rsrcinfo(Slot,root);

	printf("B\n");
	print_rsrcinfo(Slot,b);

	printf("C\n");
	printf("%s\n",GetStringInfo(Slot,c,space,40));

	printf("D\n");
	print_rsrcinfo(Slot,d);

	printf("E\n");
	printf("%s\n",GetStringInfo(Slot,e,space,40));

	printf("F\n");
	print_rsrcinfo(Slot,f);


	printf("g\n");
	printf("%s\n",GetStringInfo(Slot,g,space,40));
	printf("Video RAM Base %lx\n", GetLongInfo(Slot,j) );
	printf("Video RAM Length %lx\n", GetLongInfo(Slot,k) );

	printf("H\n");
	print_rsrcinfo(Slot,h);

	printf("I\n");
	printf("%s\n",GetStringInfo(Slot,i,space,40));

}


print_rsrcinfo(struct slot *Slot,struct dir *p)
{
	int i=0;
	int failsafe=20;

	if (p==NULL) return 1;
	while(failsafe--)
	{
		printf("RSRC %02x :%06lx\n",p[i].rsrc,p[i].offset);
		if (p[i].rsrc == 0xff) break;
		i++;
	}

}

struct dir *getRsrcByNum(struct slot *Slot,struct dir *p,int num,struct dir *out,int max)
{
	int i=0;
	int failsafe=20;
	long nextoffset=0;
	unsigned char *base;

	if (p==NULL) return NULL;


	base=getDataAtRsrc(Slot,p,num);

	if (NULL==base) return NULL;

	GetRsrcs(Slot,base,out,max);

	return out;
}

char *GetStringInfo(struct slot *Slot,unsigned char *data,char *space,int len)
{
	int i;
	char *p=space;

	if (NULL==data) return "";

	for(i=0;(i<len) && *data;i++,p++)
	{
		*p=GetByteInfo(Slot,data);
		data=IncPtr(Slot,data,1);
	}
	*p='\0';
	return space;
}

long GetLongInfo(struct slot *Slot,unsigned char *data)
{
	long ret=0;

	switch (Slot->size)
	{
		case 1:
			ret= (unsigned long)data[0]<<24  | (unsigned long)data[1]<<16 | (unsigned long)data[2]<<8 |data[3] ;
			break;
		case 2:
			ret= (unsigned long)data[0]<<24  | (unsigned long)data[2]<<16 | (unsigned long)data[4]<<8 |data[6] ;
			break;
		case 4:
			ret= (unsigned long)data[0]<<24  | (unsigned long)data[4]<<16 | (unsigned long)data[8]<<8 |data[12] ;
			break;
	}

	return ret;
}

short GetShortInfo(struct slot *Slot,unsigned char *data)
{
	short ret;

	switch (Slot->size)
	{
		case 1:
			ret=  (unsigned long)data[0]<<8 |data[1] ;
			break;
		case 2:
			ret=  (unsigned long)data[0]<<8 |data[2] ;
			break;
		case 4:
			ret=  (unsigned long)data[0]<<8 |data[4] ;
			break;
	}

	return ret;
}

char GetByteInfo(struct slot *Slot,unsigned char *data)
{
	/* boring  .... */
	return data[0];
}


int FindMagic(unsigned long data[])
{
	unsigned short *data2=(unsigned short *)data;
	unsigned char *data3=(unsigned char *)data;


	/* char data */
	if (((data3[0] )== 0x5a) &&
		((data3[1] )== 0x93) &&
		((data3[2] )== 0x2b) &&
		((data3[3] )== 0xc7) )
		return 1;

	/* short data */

	if (((data3[0] )== 0x5a) &&
		((data3[2] )== 0x93) &&
		((data3[4] )== 0x2b) &&
		((data3[6] )== 0xc7) )
		return 2;

	/* long data */
	if (((data3[0] )== 0x5a) &&
		((data3[4] )== 0x93) &&
		((data3[8] )== 0x2b) &&
		((data3[12] )== 0xc7) )
		return 4;


	return 0;
}

unsigned char *IncPtr(struct slot *Slot,unsigned char *p,int size)
{
/* MF make this a macro someday */

	unsigned char *tmp=p;

	tmp=tmp+size*Slot->size;

	return tmp;

}

int GetRsrcs(struct slot *Slot,unsigned char *p,struct dir *Dir,int maxdir)
{
	int i=0;
/* MF if you alias memory here you will be fucked. */

	if (p==NULL) return;

	while(maxdir--)
	{
		long entry;

		entry=GetLongInfo(Slot,p);

		Dir[i].rsrc=(entry 	& 0xff000000) >> 24;
		Dir[i].offset=entry & 0x00ffffff;
		Dir[i].base=(unsigned long)p;
		p=IncPtr(Slot,p,4);
		if (Dir[i].rsrc==0xff)
			break;
		i++;
	}

	return 0;
}

unsigned char *getDataAtRsrc(struct slot *Slot,struct dir *p,int num)
{
	int i=0;
	int failsafe=num;
	long nextoffset=0;
	unsigned char *base;

	if (p==NULL) return NULL;

	while(failsafe--)
	{
		if (p[i].rsrc==num)
		{
			base= (unsigned char *)( (unsigned long)Slot->size*p[i].offset+
				(unsigned long)p[i].base );
			return base;
		}
		if (p[i].rsrc==0xff) return NULL;
		i++;
	}



	return NULL;
}


int InitNubusSlot(unsigned long slotaddr,struct slot *newSlot)
{
	int i=0;
	struct slot Slot;
	struct dir *b;
	struct dir bSpace[5];
	struct dir *d;
	struct dir dSpace[5];
	struct dir *f;
	struct dir fSpace[5];
	unsigned char *c;
	unsigned char *e;
	unsigned char *g;
	unsigned char *data;

	unsigned long slotend;



	slotend=slotaddr+NBMEMSIZE-1;
	data=(unsigned char *)slotend-100;


	for(i=0;i<100;i++)
	{
/* lets be quite clear here, if magic is not on the card, then
   we will quite likely bus error, because we will read a long
   word when there are only 3 bytes left on the card, unless
   there is a card in the next slot that has readable memory starting
   at 0, so more than likely we crash, ohh well.

   The other day I heard (read) that the directory and the rest of
   the card can be in different formats, to this I say FUCK!  So
   for the time being I will just assume the whole card is in the
   same format, and let it crash most heiniously on bizzare cards
   from hell, which I hear has lots of luke warm fresca on tap.
*/
		if (Slot.size=FindMagic( (unsigned long *)(data+i) ) )
		{
			GetHeader(&Slot,slotend-100+i);
			break;
		}
	}

/* ohh ohh Mexico, i've never really been, but I'd sure like to go */
	if (Slot.size)
	{
		b=getRsrcByNum(&Slot,Slot.mainDir,1,bSpace,5);
		c=getDataAtRsrc(&Slot,b,2);
		d=getRsrcByNum(&Slot,b,0x24,dSpace,5);
		e=getDataAtRsrc(&Slot,d,1);
		f=getRsrcByNum(&Slot,Slot.mainDir,0x80,fSpace,5);
		g=getDataAtRsrc(&Slot,f,1);
		GetStringInfo(&Slot,c,Slot.name,40);
/* printf("card is %s, ",Slot.name); */
		GetStringInfo(&Slot,e,Slot.manufacturer,40);
/* printf("%s\n",Slot.manufacturer); */
/* info here is two long words (cat,type,drvrsw,drvrhw) */
		Slot.type=(GetLongInfo(&Slot,g) & 0xffff0000) >> 16;
/* printf("type is %x\n",Slot.type); */

/* sounds so simple with the sun sinking low */

	}
	else
		return 1;
/* this comment intentionally left meaningless */

	*newSlot=Slot;
	return 0;
}

struct imagedata *NUBUS_GetImageData(struct slot *Slot,
			struct imagedata *Rimage)
{
	struct imagedata image;
	struct dir *Dir;
	struct dir dirSpace[10];
	struct dir dirSpace2[10];
	unsigned char *rawImage;


	Dir=getRsrcByNum(Slot,Slot->mainDir,128,dirSpace,10);
	Dir=getRsrcByNum(Slot,Dir,128,dirSpace2,10);

	rawImage=getDataAtRsrc(Slot,Dir,1);

/* this is self documenting code, WHAT THE HELL IS THIS? */
	image.whatTheHellIsThis=GetLongInfo(Slot,rawImage);
	rawImage=IncPtr(Slot,rawImage,4);

	image.offset=GetLongInfo(Slot,rawImage);
	rawImage=IncPtr(Slot,rawImage,4);

	image.rowbytes=GetShortInfo(Slot,rawImage);
	rawImage=IncPtr(Slot,rawImage,2);

	image.top=GetShortInfo(Slot,rawImage);
	rawImage=IncPtr(Slot,rawImage,2);

	image.left=GetShortInfo(Slot,rawImage);
	rawImage=IncPtr(Slot,rawImage,2);

	image.bottom=GetShortInfo(Slot,rawImage);
	rawImage=IncPtr(Slot,rawImage,2);

	image.right=GetShortInfo(Slot,rawImage);
	rawImage=IncPtr(Slot,rawImage,2);

	image.version=GetShortInfo(Slot,rawImage);
	rawImage=IncPtr(Slot,rawImage,2);

	image.packType=GetShortInfo(Slot,rawImage);
	rawImage=IncPtr(Slot,rawImage,2);

	image.packSize=GetShortInfo(Slot,rawImage);
	rawImage=IncPtr(Slot,rawImage,2);

	image.hRes=GetLongInfo(Slot,rawImage);
	rawImage=IncPtr(Slot,rawImage,4);

	image.vRes=GetLongInfo(Slot,rawImage);
	rawImage=IncPtr(Slot,rawImage,4);

	image.pixelType=GetShortInfo(Slot,rawImage);
	rawImage=IncPtr(Slot,rawImage,2);

	image.pixelSize=GetShortInfo(Slot,rawImage);
	rawImage=IncPtr(Slot,rawImage,2);

	*Rimage=image;

	return Rimage;
}