From 5d25f6bafd84edd38c148f42afb0e6ef292b9a7a Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Mon, 3 Apr 1995 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1995-04-03

---
 pc/ether509.c  |  2 +-
 pc/scsi.c      | 21 +++++++++++++--------
 port/devsd.c   | 39 +++++++++++++++++++++++++++++++++++++--
 port/portfns.h |  2 +-
 4 files changed, 52 insertions(+), 12 deletions(-)

diff --git a/pc/ether509.c b/pc/ether509.c
index 24185f45021700f950e519ec2544417502c6bbdf..9f5db085c60527ac9fed16fe90478c885fcfab9a 100644
--- a/pc/ether509.c
+++ b/pc/ether509.c
@@ -581,7 +581,7 @@ ether509reset(Ether *ether)
 		}
 	}
 	if(strcmp(ether->type, "3C589") == 0)
-		port = ether->card.port;
+		port = ether->port;
 	if(port == 0)
 		port = tcm579(ether);
 	if(port == 0)
diff --git a/pc/scsi.c b/pc/scsi.c
index 7b2f2c4906590c9b4bb9fa8225b7ed60a0f0c4e8..be7fda0ccc88c2d26031e49f863db3be21370dee 100644
--- a/pc/scsi.c
+++ b/pc/scsi.c
@@ -158,7 +158,7 @@ scsiprobe(Ctlr *ctlr)
 			print("scsi%d: unit %d inquire failed, status %d\n", t->ctlrno, i, s);
 			continue;
 		}
-		print("scsi%d: unit %d %s\n", t->ctlrno, i, t->inq+8);
+		print("scsi%d: unit %d:%2.2ux: %s\n", t->ctlrno, i, t->inq[0], t->inq+8);
 		t->ok = 1;
 	}
 }
@@ -185,10 +185,10 @@ inventory(void)
 }
 
 int
-scsiinv(int devno, int type, Target **rt, uchar **inq, char *id)
+scsiinv(int devno, int *type, Target **rt, uchar **inq, char *id)
 {
 	Target *t;
-	int ctlr, unit;
+	int ctlr, *i, unit;
 
 	inventory();
 
@@ -200,11 +200,16 @@ scsiinv(int devno, int type, Target **rt, uchar **inq, char *id)
 
 		t = &scsi[ctlr]->target[unit];
 		devno++;
-		if(t->ok && (t->inq[0]&0x1F) == type){
-			*rt = t;
-			*inq = t->inq;
-			sprint(id, "scsi%d: unit %d", ctlr, unit);
-			return devno;
+		if(t->ok){
+			for(i = type; *i >= 0; i++){
+				if((t->inq[0]&0x1F) != *i)
+					continue;
+				*rt = t;
+				*inq = t->inq;
+				sprint(id, "scsi%d: unit %d", ctlr, unit);
+print("devno %d = %s\n", devno, id);
+				return devno;
+			}
 		}
 	}
 	return -1;
diff --git a/port/devsd.c b/port/devsd.c
index 92ca00a1cd93b52a081352147f2d2266c7291e8b..b077b615b99e49e396cee818188a14354a2ea45d 100644
--- a/port/devsd.c
+++ b/port/devsd.c
@@ -9,6 +9,13 @@
 #include	"../port/error.h"
 #include	"devtab.h"
 
+enum {
+	TypeDA		= 0x00,		/* Direct Access */
+	TypeWO		= 0x04,		/* Worm */
+	TypeCD		= 0x05,		/* CD-ROM */
+	TypeMO		= 0x07,		/* rewriteable Magneto-Optical */
+};
+
 enum
 {
 	LogNpart	= 4,
@@ -51,6 +58,11 @@ Disk	disk[Ndisk];
 static	void	sdrdpart(Disk*);
 static	long	sdio(Chan*, int, char*, ulong, ulong);
 
+static int types[] = {
+	TypeDA, TypeWO, TypeCD, TypeMO,
+	-1,
+};
+
 static int
 sdgen(Chan *c, Dirtab*, long, long s, Dir *dirp)
 {
@@ -93,7 +105,7 @@ sdinit(void)
 	dev = 0;
 	for(;;) {
 		d = &disk[ndisk];
-		dev = scsiinv(dev, 0, &d->t, &d->inquire, d->id);
+		dev = scsiinv(dev, types, &d->t, &d->inquire, d->id);
 		if(dev < 0)
 			break;
 
@@ -140,7 +152,21 @@ sdinit(void)
 
 			d->size = s;
 			d->bsize = b;
-			sprint(d->vol, "sd%d", ndisk);
+			switch(d->inquire[0] & 0x1F){
+
+			case TypeDA:
+			case TypeWO:
+			case TypeMO:
+				sprint(d->vol, "sd%d", ndisk);
+				break;
+
+			case TypeCD:
+				sprint(d->vol, "cd%d", ndisk);
+				break;
+
+			default:
+				continue;
+			}
 
 			if(++ndisk >= Ndisk)
 				break;
@@ -278,6 +304,12 @@ sdrdpart(Disk *d)
 	p++;
 	d->npart = 2;
 
+	if((d->inquire[0] & 0x1F) == TypeCD){
+		scsifree(b);
+		qunlock(d);
+		return;
+	}
+
 	scsibio(d->t, d->lun, SCSIread, b, 1, d->bsize, d->table[0].end-1);
 	b[d->bsize-1] = '\0';
 
@@ -320,6 +352,9 @@ sdio(Chan *c, int write, char *a, ulong len, ulong offset)
 	d = &disk[DRIVE(c->qid)];
 	p = &d->table[PART(c->qid)];
 
+	if(write && (d->inquire[0] & 0x1F) == TypeCD)
+		error(Eperm);
+
 	block = (offset / d->bsize) + p->beg;
 	n = (offset + len + d->bsize - 1) / d->bsize + p->beg - block;
 	max = SCSImaxxfer / d->bsize;
diff --git a/port/portfns.h b/port/portfns.h
index 0b6e62a405cff34e65fa9c890861962b035638a7..47fb04dfa53f20afbc4a39e46eb0b7cfe9d36c64 100644
--- a/port/portfns.h
+++ b/port/portfns.h
@@ -240,7 +240,7 @@ int		scsicap(Target*, char, ulong*, ulong*);
 int		scsiexec(Target*, int, uchar*, int, void*, int*);
 #define		scsifree(p)	free(p)
 int		scsiinquiry(Target*, char, void*, int*);
-int		scsiinv(int, int, Target**, uchar**, char*);
+int		scsiinv(int, int*, Target**, uchar**, char*);
 int		scsireqsense(Target*, char, int);
 int		scsistart(Target*, char, int);
 Target*		scsiunit(int, int);