NetBSD/sys/dev/isa/if_ep_isa.c

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/* $NetBSD: if_ep_isa.c,v 1.8 1996/10/21 22:40:56 thorpej Exp $ */
/*
* Copyright (c) 1996 Jason R. Thorpe <thorpej@beer.org>
* Copyright (c) 1994 Herb Peyerl <hpeyerl@beer.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Herb Peyerl.
* 4. The name of Herb Peyerl may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "bpfilter.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/errno.h>
#include <sys/syslog.h>
#include <sys/select.h>
#include <sys/device.h>
#include <sys/queue.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <net/if_types.h>
#include <net/netisr.h>
#ifdef INET
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/in_var.h>
#include <netinet/ip.h>
#include <netinet/if_ether.h>
#endif
#ifdef NS
#include <netns/ns.h>
#include <netns/ns_if.h>
#endif
#if NBPFILTER > 0
#include <net/bpf.h>
#include <net/bpfdesc.h>
#endif
#include <machine/cpu.h>
#include <machine/bus.h>
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#include <machine/intr.h>
#include <dev/ic/elink3var.h>
#include <dev/ic/elink3reg.h>
#include <dev/isa/isavar.h>
#include <dev/isa/elink.h>
int ep_isa_probe __P((struct device *, void *, void *));
void ep_isa_attach __P((struct device *, struct device *, void *));
struct cfattach ep_isa_ca = {
sizeof(struct ep_softc), ep_isa_probe, ep_isa_attach
};
static void epaddcard __P((int, int, int));
/*
* This keeps track of which ISAs have been through an ep probe sequence.
* A simple static variable isn't enough, since it's conceivable that
* a system might have more than one ISA bus.
*
* The "er_bus" member is the unit number of the parent ISA bus, e.g. "0"
* for "isa0".
*/
struct ep_isa_done_probe {
LIST_ENTRY(ep_isa_done_probe) er_link;
int er_bus;
};
static LIST_HEAD(, ep_isa_done_probe) ep_isa_all_probes;
static int ep_isa_probes_initialized;
#define MAXEPCARDS 20 /* if you have more than 20, you lose */
static struct epcard {
int bus;
int iobase;
int irq;
char available;
} epcards[MAXEPCARDS];
static int nepcards;
static void
epaddcard(bus, iobase, irq)
int bus, iobase, irq;
{
if (nepcards >= MAXEPCARDS)
return;
epcards[nepcards].bus = bus;
epcards[nepcards].iobase = iobase;
epcards[nepcards].irq = (irq == 2) ? 9 : irq;
epcards[nepcards].available = 1;
nepcards++;
}
/*
* 3c509 cards on the ISA bus are probed in ethernet address order.
* The probe sequence requires careful orchestration, and we'd like
* like to allow the irq and base address to be wildcarded. So, we
* probe all the cards the first time epprobe() is called. On subsequent
* calls we look for matching cards.
*/
int
ep_isa_probe(parent, match, aux)
struct device *parent;
void *match, *aux;
{
struct isa_attach_args *ia = aux;
bus_space_tag_t iot = ia->ia_iot;
bus_space_handle_t ioh;
int slot, iobase, irq, i;
u_int16_t vendor, model;
struct ep_isa_done_probe *er;
int bus = parent->dv_unit;
if (ep_isa_probes_initialized == 0) {
LIST_INIT(&ep_isa_all_probes);
ep_isa_probes_initialized = 1;
}
/*
* Probe this bus if we haven't done so already.
*/
for (er = ep_isa_all_probes.lh_first; er != NULL;
er = er->er_link.le_next)
if (er->er_bus == parent->dv_unit)
goto bus_probed;
/*
* Mark this bus so we don't probe it again.
*/
er = (struct ep_isa_done_probe *)
malloc(sizeof(struct ep_isa_done_probe), M_DEVBUF, M_NOWAIT);
if (er == NULL)
panic("ep_isa_probe: can't allocate state storage");
er->er_bus = bus;
LIST_INSERT_HEAD(&ep_isa_all_probes, er, er_link);
/*
* Map the Etherlink ID port for the probe sequence.
*/
if (bus_space_map(iot, ELINK_ID_PORT, 1, 0, &ioh)) {
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printf("ep_isa_probe: can't map Etherlink ID port\n");
return 0;
}
for (slot = 0; slot < MAXEPCARDS; slot++) {
elink_reset(iot, ioh, parent->dv_unit);
elink_idseq(iot, ioh, ELINK_509_POLY);
/* Untag all the adapters so they will talk to us. */
if (slot == 0)
bus_space_write_1(iot, ioh, 0, TAG_ADAPTER + 0);
vendor = htons(epreadeeprom(iot, ioh, EEPROM_MFG_ID));
if (vendor != MFG_ID)
continue;
model = htons(epreadeeprom(iot, ioh, EEPROM_PROD_ID));
if ((model & 0xfff0) != PROD_ID) {
#ifndef trusted
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printf(
"ep_isa_probe: ignoring model %04x\n", model);
#endif
continue;
}
iobase = epreadeeprom(iot, ioh, EEPROM_ADDR_CFG);
iobase = (iobase & 0x1f) * 0x10 + 0x200;
irq = epreadeeprom(iot, ioh, EEPROM_RESOURCE_CFG);
irq >>= 12;
epaddcard(bus, iobase, irq);
/* so card will not respond to contention again */
bus_space_write_1(iot, ioh, 0, TAG_ADAPTER + 1);
/*
* XXX: this should probably not be done here
* because it enables the drq/irq lines from
* the board. Perhaps it should be done after
* we have checked for irq/drq collisions?
*/
bus_space_write_1(iot, ioh, 0, ACTIVATE_ADAPTER_TO_CONFIG);
}
/* XXX should we sort by ethernet address? */
bus_space_unmap(iot, ioh, 1);
bus_probed:
for (i = 0; i < nepcards; i++) {
if (epcards[i].bus != bus)
continue;
if (epcards[i].available == 0)
continue;
if (ia->ia_iobase != IOBASEUNK &&
ia->ia_iobase != epcards[i].iobase)
continue;
if (ia->ia_irq != IRQUNK &&
ia->ia_irq != epcards[i].irq)
continue;
goto good;
}
return 0;
good:
epcards[i].available = 0;
ia->ia_iobase = epcards[i].iobase;
ia->ia_irq = epcards[i].irq;
ia->ia_iosize = 0x10;
ia->ia_msize = 0;
return 1;
}
void
ep_isa_attach(parent, self, aux)
struct device *parent, *self;
void *aux;
{
struct ep_softc *sc = (void *)self;
struct isa_attach_args *ia = aux;
bus_space_tag_t iot = ia->ia_iot;
bus_space_handle_t ioh;
u_short conn = 0;
/* Map i/o space. */
if (bus_space_map(iot, ia->ia_iobase, ia->ia_iosize, 0, &ioh))
panic("ep_isa_attach: can't map i/o space");
sc->sc_iot = iot;
sc->sc_ioh = ioh;
sc->bustype = EP_BUS_ISA;
GO_WINDOW(0);
conn = bus_space_read_2(iot, ioh, EP_W0_CONFIG_CTRL);
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printf(": 3Com 3C509 Ethernet\n");
epconfig(sc, conn);
sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE,
IPL_NET, epintr, sc);
}