Date: Mon, 17 Jul 1995 16:11:00 EST5EDT From: "Andrew Webster" <awebster@dataradio.com> To: freebsd-questions@freebsd.org Subject: SMC8216/8416 Cards Message-ID: <199507172005.QAA00206@vhf.dataradio.com>
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Hi,
I've been trying to get FreeBSD 2.0.5-RELEASE to work using an SMC8416BT
(Ether EZ) card, but with no luck so far.
My first attempt uncovered a problem in the ed_probe routine which
incorrectly tries to determine what type of card it is (8216C or 8416C/BT).
The card is now correctly detected, but upon frame transmission, I get a
kernel panic.
I'd like to get this driver working for this card. Any help would be
appreciated.
I've included the necessary patch to make this work properly. On many
clone PC buses, a read on memory locations with no RAM will return the the
address, IE: A read at 0xD2000 will return 0. This was confusing the
probe code to think that the card was an 8216.
Patch for if_ed.c for correct 8216C/8416C determination:
*** if_ed.c.old Mon Jul 17 11:15:41 1995
--- if_ed.c Mon Jul 17 15:47:10 1995
***************
*** 279,284 ****
--- 279,285 ----
int i;
u_int memsize;
u_char iptr, isa16bit, sum;
+ unsigned int aw_smc_test;
sc->asic_addr = isa_dev->id_iobase;
sc->nic_addr = sc->asic_addr + ED_WD_NIC_OFFSET;
***************
*** 390,397 ****
isa16bit = 1;
break;
case ED_TYPE_SMC8216C: /* 8216 has 16K shared mem -- 8416 has 8K */
! (unsigned int) *(isa_dev->id_maddr+8192) = (unsigned int)0;
! if ((unsigned int) *(isa_dev->id_maddr+8192)) {
sc->type_str = "SMC8416C/SMC8416BT";
sc->kdc.kdc_description =
"Ethernet adapter: SMC 8416C or 8416BT";
--- 391,406 ----
isa16bit = 1;
break;
case ED_TYPE_SMC8216C: /* 8216 has 16K shared mem -- 8416 has 8K */
! /*
! * A proper test is to take whatever value is at that memory
! * location, negate it, and write it back. Then check and
! * see if the values read back negated corresponds to the
! * original value. If it does, there is definately RAM there!
! */
! aw_smc_test = (unsigned int) *(isa_dev->id_maddr+8192);
! (unsigned int) *(isa_dev->id_maddr+8192) = aw_smc_test ^ 0xffff;
! if ((unsigned int) *(isa_dev->id_maddr+8192) ^ 0xffff !=
! aw_smc_test) {
sc->type_str = "SMC8416C/SMC8416BT";
sc->kdc.kdc_description =
"Ethernet adapter: SMC 8416C or 8416BT";
-----------------------------------------------------------------------
Andrew Webster Network Manager / Special Projects
Dataradio Inc. 200-5500 Royalmount Ave. TEL: +1 514 737 0020
Town of Mount Royal, QC, CANADA H4P 1H7 FAX: +1 514 737 7883
http://www.dataradio.com Email: awebster@dataradio.com
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