diff options
| author | dg <dg@FreeBSD.org> | 1993-10-01 00:56:43 +0000 |
|---|---|---|
| committer | dg <dg@FreeBSD.org> | 1993-10-01 00:56:43 +0000 |
| commit | d823f577a1cdeae03e92c02195c76cbd0665d226 (patch) | |
| tree | 0e78fcc205937bc6e3e7101e3d72540b75706de6 /sys/dev/ed | |
| parent | 0931dcbc5d5ed32ab326940550a2ca516b589f45 (diff) | |
| download | FreeBSD-src-d823f577a1cdeae03e92c02195c76cbd0665d226.zip FreeBSD-src-d823f577a1cdeae03e92c02195c76cbd0665d226.tar.gz | |
* Revision 2.5 93/09/30 17:44:14 davidg
* patch from vak@zebub.msk.su (Serge V.Vakulenko) to work around
* a hardware bug in cheap WD clone boards where the PROM checksum
* byte is always zero
Diffstat (limited to 'sys/dev/ed')
| -rw-r--r-- | sys/dev/ed/if_ed.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/sys/dev/ed/if_ed.c b/sys/dev/ed/if_ed.c index 327be52..936ba58 100644 --- a/sys/dev/ed/if_ed.c +++ b/sys/dev/ed/if_ed.c @@ -20,12 +20,17 @@ */ /* - * $Id: if_ed.c,v 2.4 93/09/29 21:24:30 davidg Exp Locker: davidg $ + * $Id: if_ed.c,v 2.5 93/09/30 17:44:14 davidg Exp Locker: davidg $ */ /* * Modification history * + * Revision 2.5 93/09/30 17:44:14 davidg + * patch from vak@zebub.msk.su (Serge V.Vakulenko) to work around + * a hardware bug in cheap WD clone boards where the PROM checksum + * byte is always zero + * * Revision 2.4 93/09/29 21:24:30 davidg * Added software NIC reset in NE probe to work around a problem * with some NE boards where the 8390 doesn't reset properly on @@ -270,14 +275,21 @@ ed_probe_WD80x3(isa_dev) * If it fails, it's probably not a SMC/WD board. There * is a problem with this, though: some clone WD boards * don't pass the checksum test. Danpex boards for one. - * XXX - We need to do additional checking for this case. */ for (sum = 0, i = 0; i < 8; ++i) sum += inb(sc->asic_addr + ED_WD_PROM + i); - - if (sum != ED_WD_ROM_CHECKSUM_TOTAL) - return(0); - + + if (sum != ED_WD_ROM_CHECKSUM_TOTAL) { + /* + * Checksum is invalid. This often happens with cheap + * WD8003E clones. In this case, the checksum byte + * (the eighth byte) seems to always be zero. + */ + if (inb(sc->asic_addr + ED_WD_CARD_ID) != ED_TYPE_WD8003E || + inb(sc->asic_addr + ED_WD_PROM + 7) != 0) + return(0); + } + /* reset card to force it into a known state. */ outb(sc->asic_addr + ED_WD_MSR, ED_WD_MSR_RST); DELAY(100); |
