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* 3c509s drop the low-oder bits of EP_THRESH_DISABLE (2047) on a write, 

and the result reads back as zero.  Mask probe code accordingly.
This commit is contained in:
jonathan 1996-11-22 04:48:26 +00:00
parent 73b960a308
commit f6a82ef733
2 changed files with 10 additions and 5 deletions
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9
sys/dev/ic/elink3.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: elink3.c,v 1.12 1996/11/17 23:58:29 jonathan Exp $ */
/* $NetBSD: elink3.c,v 1.13 1996/11/22 04:48:26 jonathan Exp $ */
/*
* Copyright (c) 1994 Herb Peyerl <hpeyerl@beer.org>
@ -158,16 +158,17 @@ epconfig(sc, conn)
* threshold value was shifted or not.
*/
bus_space_write_2(iot, ioh, EP_COMMAND,
SET_TX_AVAIL_THRESH | EP_THRESH_DISABLE );
SET_TX_AVAIL_THRESH | EP_LARGEWIN_PROBE );
GO_WINDOW(5);
i = bus_space_read_2(iot, ioh, EP_W5_TX_AVAIL_THRESH);
GO_WINDOW(1);
switch (i) {
case EP_THRESH_DISABLE:
case EP_LARGEWIN_PROBE:
case (EP_LARGEWIN_PROBE & EP_LARGEWIN_MASK):
sc->ep_pktlenshift = 0;
break;
case (EP_THRESH_DISABLE << 2):
case (EP_LARGEWIN_PROBE << 2):
sc->ep_pktlenshift = 2;
break;

6
sys/dev/ic/elink3reg.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: elink3reg.h,v 1.6 1996/11/17 23:58:30 jonathan Exp $ */
/* $NetBSD: elink3reg.h,v 1.7 1996/11/22 04:48:27 jonathan Exp $ */
/*
* Copyright (c) 1995 Herb Peyerl <hpeyerl@beer.org>
@ -359,3 +359,7 @@
#define IS_PCI_AUI (1<<5)
#define IS_PCI_BNC (1<<4)
#define IS_PCI_UTP (1<<3)
/* Used to probe for large-packet support */
#define EP_LARGEWIN_PROBE EP_THRESH_DISABLE
#define EP_LARGEWIN_MASK 0xffc