#include	"all.h" enum{	Nblock		= 20,	/* blocking factor */}; static	Dev	dev; static	int	xopen(void);static	int	xgettoc(void);static	void	xcopytrack(int, int, int, int); static	intxopen(void){	if(dev.chan.open == 0) {		doprobe(Dplex, &dev.chan);		if(dev.chan.open == 0) {			print("plextor not on scsi\n");			return 1;		}	}	if(xgettoc())	/* toc address are adjusted by block size */		return 1;	return 0;} voidxload(void){	int fromtrack, type, totrack;	int bs, i; 	if(xopen())		return;	fromtrack = gettrack("CD track [number]/*");	if(fromtrack < dev.firsttrack || fromtrack > dev.lasttrack)		if(fromtrack != Trackall) {			print("from track out of range %d-%d\n", dev.firsttrack, dev.lasttrack);			return;		} 	type = gettype("type [cdda/cdrom]");	switch(type) {	default:		print("bad type\n");		return;	case Tcdrom:		bs = Bcdrom;		break;	case Tcdda:		bs = Bcdda;		break;	} 	totrack = gettrack("disk track [number]"); 	if(fromtrack == Trackall) {		for(i=dev.firsttrack; i<=dev.lasttrack; i++) {			print("track %d\n", i);			xcopytrack(i, totrack, bs, type);			totrack++;		}		return;	}	xcopytrack(fromtrack, totrack, bs, type);} voidxverif(void){	int fromtrack, type, totrack;	int bs, i; 	if(xopen())		return;	fromtrack = gettrack("CD track [number]/*");	if(fromtrack < dev.firsttrack || fromtrack > dev.lasttrack)		if(fromtrack != Trackall) {			print("from track out of range %d-%d\n", dev.firsttrack, dev.lasttrack);			return;		} 	type = Tcdda;	bs = Bcdda; 	totrack = gettrack("disk track [number]"); 	if(fromtrack == Trackall) {		for(i=dev.firsttrack; i<=dev.lasttrack; i++) {			print("track %d->%d\n", i, totrack);			xcopytrack(i, totrack, bs, type);			for(;;) {				print("track %d->t\n", i);				xcopytrack(i, Tracktmp, bs, type);				if(dverify(totrack, Tracktmp))					break;				print("track %d->%d\n", i, totrack);				xcopytrack(i, totrack, bs, type);				if(dverify(totrack, Tracktmp))					break;			}			dclearentry(Tracktmp, 1);			totrack++;		}		return;	} 	print("track %d->%d\n", fromtrack, totrack);	xcopytrack(fromtrack, totrack, bs, type);	for(;;) {		print("track %d->t\n", fromtrack);		xcopytrack(fromtrack, Tracktmp, bs, type);		if(dverify(totrack, Tracktmp))			break;		print("track %d->%d\n", fromtrack, totrack);		xcopytrack(fromtrack, totrack, bs, type);		if(dverify(totrack, Tracktmp))			break;	}	dclearentry(Tracktmp, 1);} voidxtoc(void){	int i; 	if(xopen())		return; 	print("plextor table of contents\n");	for(i=0; i<Ntrack; i++)		if(dev.table[i].size)			print("%3d %7ld %6ld\n", i,				dev.table[i].start,				dev.table[i].size);} static	voidxcopytrack(int from, int to, int bs, int type){	int ioc;	long sz, ad, n;	uchar *buf; 	if(to < 0 || to >= Maxtrack) {		print("disk track not in range %d\n", to);		return;	}	buf = dbufalloc(Nblock, bs);	if(buf == 0)		return; 	ioc = 0xd8;	if(type == Tcdrom)		ioc = 0x28; 	/* dummy read to break readahead check condition */	readscsi(dev.chan, buf, 0, bs, bs, ioc, 0); 	sz = dev.table[from].size;	ad = dev.table[from].start - dev.table[dev.firsttrack].start;	while(sz > 0) {		n = Nblock;		if(sz < Nblock)			n = sz;		if(readscsi(dev.chan, buf, ad, n*bs, bs, ioc, 0))			return;		if(dwrite(buf, n))			return;		ad += n;		sz -= n;	}	dcommit(to, type);} static	intxgettoc(void){	uchar cmd[10], resp[Ntrack*8 + 4];	int i, n, t, ft, lt;	long a; 	memset(cmd, 0, sizeof(cmd));	cmd[0] = 0x43;		/* disk info */	cmd[7] = sizeof(resp)>>8;	cmd[8] = sizeof(resp);	n = scsi(dev.chan, cmd, sizeof(cmd), resp, sizeof(resp), 0);	if(n < 4) {		print("cant issue in disk info command\n");		return 1;	} 	dev.firsttrack = 0;	dev.lasttrack = 0;	for(i=0; i<Ntrack; i++)		dev.table[i].start = -1; 	ft = resp[2];	lt = resp[3];	if(ft <= 0 || ft >= Maxtrack) {		print("first table %d not in range\n", ft);		return 1;	}	if(lt <= 0 || lt >= Maxtrack) {		print("last table %d not in range\n", lt);		return 1;	}	n -= 7;	for(i=4; i<n; i+=8) {		t = resp[i+2];		if(t >= 0xa0)			t = Maxtrack;		else		if(t < ft || t > lt) {			print("table %d not in range\n", t);			return 1;		}		dev.table[t].type = resp[i+1];		dev.table[t].start = bige(&resp[i+4]);		/* for some reason, last track is under reported */		if(t == Maxtrack)			dev.table[t].start--;	} 	a = 0;	for(i=Ntrack-1; i>=0; i--) {		if(dev.table[i].start == -1) {			dev.table[i].start = a;			dev.table[i].size = 0;			continue;		}		a -= dev.table[i].start;		if(a < 0)			a = 0;		dev.table[i].size = a;		a = dev.table[i].start;	} 	dev.firsttrack = ft;	dev.lasttrack = lt;	return 0;}