/*  * This file is part of the UCB release of Plan 9. It is subject to the license * terms in the LICENSE file found in the top-level directory of this * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No * part of the UCB release of Plan 9, including this file, may be copied, * modified, propagated, or distributed except according to the terms contained * in the LICENSE file. */ #include <u.h>#include <libc.h>#include <bio.h>#include <disk.h>#include "scsireq.h" extern Biobuf bout; longSRcdpause(ScsiReq *rp, int resume){	uchar cmd[10]; 	memset(cmd, 0, sizeof(cmd));	cmd[0] = ScmdCDpause;	cmd[8] = resume;	rp->cmd.p = cmd;	rp->cmd.count = sizeof(cmd);	rp->data.p = cmd;	rp->data.count = 0;	rp->data.write = 1;	return SRrequest(rp);} longSRcdstop(ScsiReq *rp){	uchar cmd[10]; 	memset(cmd, 0, sizeof(cmd));	cmd[0] = ScmdCDstop;	rp->cmd.p = cmd;	rp->cmd.count = sizeof(cmd);	rp->data.p = cmd;	rp->data.count = 0;	rp->data.write = 1;	return SRrequest(rp);} static long_SRcdplay(ScsiReq *rp, long lba, long length){	uchar cmd[12]; 	memset(cmd, 0, sizeof(cmd));	cmd[0] = ScmdCDplay;	cmd[2] = lba>>24;	cmd[3] = lba>>16;	cmd[4] = lba>>8;	cmd[5] = lba;	cmd[6] = length>>24;	cmd[7] = length>>16;	cmd[8] = length>>8;	cmd[9] = length;	rp->cmd.p = cmd;	rp->cmd.count = sizeof(cmd);	rp->data.p = cmd;	rp->data.count = 0;	rp->data.write = 1; 	return SRrequest(rp);} static struct {	int	trackno;	long	lba;	long	length;} tracks[100];static int ntracks; longSRcdplay(ScsiReq *rp, int raw, long start, long length){	uchar d[100*8+4], *p;	int lba, n, tdl; 	if(raw || start == 0)		return _SRcdplay(rp, start, length); 	ntracks = 0;	if(SRTOC(rp, d, sizeof(d), 0, 0) == -1){		if(rp->status == STok)			Bprint(&bout, "\t(probably empty)\n");		return -1;	}	tdl = (d[0]<<8)|d[1];	for(p = &d[4], n = tdl-2; n; n -= 8, p += 8){		tracks[ntracks].trackno = p[2];		lba = (p[4]<<24)|(p[5]<<16)|(p[6]<<8)|p[7];		tracks[ntracks].lba = lba;		if(ntracks > 0)			tracks[ntracks-1].length = lba-tracks[ntracks-1].lba;		ntracks++;	}	if(ntracks > 0)		tracks[ntracks-1].length = 0xFFFFFFFF; 	for(n = 0; n < ntracks; n++){		if(start != tracks[n].trackno)			continue;		return _SRcdplay(rp, tracks[n].lba, tracks[n].length);	} 	return -1;} longSRcdload(ScsiReq *rp, int load, int slot){	uchar cmd[12]; 	memset(cmd, 0, sizeof(cmd));	cmd[0] = ScmdCDload;	if(load)		cmd[4] = 0x03;	else		cmd[4] = 0x02;	cmd[8] = slot;	rp->cmd.p = cmd;	rp->cmd.count = sizeof(cmd);	rp->data.p = cmd;	rp->data.count = 0;	rp->data.write = 1;	return SRrequest(rp);} longSRcdstatus(ScsiReq *rp, uchar *list, int nbytes){	uchar cmd[12]; 	memset(cmd, 0, sizeof(cmd));	cmd[0] = ScmdCDstatus;	cmd[8] = nbytes>>8;	cmd[9] = nbytes;	rp->cmd.p = cmd;	rp->cmd.count = sizeof(cmd);	rp->data.p = list;	rp->data.count = nbytes;	rp->data.write = 0;	return SRrequest(rp);} longSRgetconf(ScsiReq *rp, uchar *list, int nbytes){	uchar cmd[10]; 	memset(cmd, 0, sizeof(cmd));	cmd[0] = Scmdgetconf;	cmd[7] = nbytes>>8;	cmd[8] = nbytes;	rp->cmd.p = cmd;	rp->cmd.count = sizeof(cmd);	rp->data.p = list;	rp->data.count = nbytes;	rp->data.write = 0;	return SRrequest(rp);}