From 01e8e49aa19b9e64c43644bdbc1a88277652137c Mon Sep 17 00:00:00 2001
From: dufault <dufault@FreeBSD.org>
Date: Sun, 31 Jan 1999 22:41:51 +0000
Subject: Move the "fetch serial data" delay so that it is an inter-bit delay.
 Increase the overall length of the delay by 10.

Without this a 3C509 card on my MediaGX crash box can't be reliably
read.  With this it is solid.

I've left a delay multiplier in instead of just changing the base
delay because I'm surprised I had to increase it so much and expect
there may be another problem.
---
 sys/dev/ep/if_ep.c | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

(limited to 'sys/dev/ep/if_ep.c')

diff --git a/sys/dev/ep/if_ep.c b/sys/dev/ep/if_ep.c
index e325ada..387184e 100644
--- a/sys/dev/ep/if_ep.c
+++ b/sys/dev/ep/if_ep.c
@@ -38,7 +38,7 @@
  */
 
 /*
- *  $Id: if_ep.c,v 1.77 1998/10/22 05:58:39 bde Exp $
+ *  $Id: if_ep.c,v 1.78 1999/01/19 00:21:39 peter Exp $
  *
  *  Promiscuous mode added and interrupt logic slightly changed
  *  to reduce the number of adapter failures. Transceiver select
@@ -105,6 +105,12 @@
 #include <i386/isa/if_epreg.h>
 #include <i386/isa/elink.h>
 
+/* DELAY_MULTIPLE: How much to boost "base" delays, except
+ * for the inter-bit delays in get_eeprom_data.  A cyrix Media GX needed this.
+ */
+#define DELAY_MULTIPLE 10
+#define BIT_DELAY_MULTIPLE 10
+
 /* Exported variables */
 u_long	ep_unit;
 int	ep_boards;
@@ -305,7 +311,7 @@ ep_look_for_board_at(is)
 	elink_idseq(0xCF);
 
 	elink_reset();
-	DELAY(10000);
+	DELAY(DELAY_MULTIPLE * 10000);
 	for (i = 0; i < EP_MAX_BOARDS; i++) {
 	    outb(id_port, 0);
 	    outb(id_port, 0);
@@ -743,7 +749,7 @@ epinit(sc)
       case ACF_CONNECTOR_BNC:
 	if (sc->ep_connectors & BNC) {
 	    outw(BASE + EP_COMMAND, START_TRANSCEIVER);
-	    DELAY(1000);
+	    DELAY(DELAY_MULTIPLE * 1000);
 	}
 	break;
       case ACF_CONNECTOR_AUI:
@@ -1389,6 +1395,7 @@ send_ID_sequence(port)
  * the AX register which is conveniently returned to us by inb().  Hence; we
  * read 16 times getting one bit of data with each read.
  */
+
 static int
 get_eeprom_data(id_port, offset)
     int id_port;
@@ -1396,9 +1403,10 @@ get_eeprom_data(id_port, offset)
 {
     int i, data = 0;
     outb(id_port, 0x80 + offset);
-    DELAY(1000);
-    for (i = 0; i < 16; i++)
+    for (i = 0; i < 16; i++) {
+    	DELAY(BIT_DELAY_MULTIPLE * 1000);
 	data = (data << 1) | (inw(id_port) & 1);
+    }
     return (data);
 }
 
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