Removed builtin list of port addresses. The address for sio3

conflicted with S3 graphics cards.  Now users should put sio[2-3]
in the config file if the hardware exisst, even if the probe is
certain to fail due to an interrupt conflict.  Otherwise, ports
sharing the interrupt may fail the probe if the system is warm
booted while sio[2-3] are active (perhaps under another OS).  The
same problem for nonstandard ports is now handled better than
before.

1 files changed, 5 insertions, 10 deletions

diff --git a/sys/i386/isa/sio.c b/sys/i386/isa/sio.c
index 7692fd1..5e6800c 100644
--- a/sys/i386/isa/sio.c
+++ b/sys/i386/isa/sio.c
@@ -31,7 +31,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)com.c	7.5 (Berkeley) 5/16/91
- *	$Id: sio.c,v 1.121 1995/11/29 10:47:54 julian Exp $
+ *	$Id: sio.c,v 1.122 1995/11/29 14:39:57 julian Exp $
  */
 
 #include "sio.h"
@@ -339,9 +339,6 @@ static	struct speedtab comspeedtab[] = {
 	{ -1,		-1 }
 };
 
-/* XXX - configure this list */
-static Port_t likely_com_ports[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8, };
-
 static struct kern_devconf kdc_sio[NSIO] = { {
 	0, 0, 0,		/* filled in by dev_attach */
 	"sio", 0, { MDDT_ISA, 0, "tty" },
@@ -502,13 +499,13 @@ sioprobe(dev)
 	struct isa_device	*dev;
 {
 	static bool_t	already_init;
-	Port_t		*com_ptr;
 	bool_t		failures[10];
 	int		fn;
 	struct isa_device	*idev;
 	Port_t		iobase;
 	u_char		mcr_image;
 	int		result;
+	struct isa_device	*xdev;
 
 	sioregisterdev(dev);
 
@@ -519,11 +516,9 @@ sioprobe(dev)
 		 * from any used port that shares the interrupt vector.
 		 * XXX the gate enable is elsewhere for some multiports.
 		 */
-		for (com_ptr = likely_com_ports;
-		     com_ptr < &likely_com_ports[sizeof likely_com_ports
-						 / sizeof likely_com_ports[0]];
-		     ++com_ptr)
-			outb(*com_ptr + com_mcr, 0);
+		for (xdev = isa_devtab_tty; xdev->id_driver != NULL; xdev++)
+			if (xdev->id_driver == &siodriver && xdev->id_enabled)
+				outb(xdev->id_iobase + com_mcr, 0);
 #if NCRD > 0
 /*
  *	If PC-Card probe required, then register driver with