NetBSD-5.0.2/sys/dev/mca/if_le_mca.c
/* $NetBSD: if_le_mca.c,v 1.18 2008/04/28 20:23:53 martin Exp $ */
/*-
* Copyright (c) 2001 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jaromir Dolecek.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/
/*
* Driver for SKNET Personal and MC2+ cards, which are AMD Lance 7990 based
* cards made by Syskonnect, former Schneider & Koch Datensysteme GmbH.
*
* Syskonnect was very helpful and provided docs for these cards promptly.
* I wish all vendors would be like that!
* I'd like to thank to Alfred Arnold, author of the Linux driver, for
* giving me contact to The Right Syskonnect person, too :-)
*
* Sources:
* SKNET MC+ Technical Manual, version 1.1, July 21 1993
* SKNET personal Technisches Manual, version 1.2, April 14 1988
* SKNET junior Technisches Manual, version 1.0, July 14 1987
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_le_mca.c,v 1.18 2008/04/28 20:23:53 martin Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/mbuf.h>
#include <sys/syslog.h>
#include <sys/socket.h>
#include <sys/device.h>
#include <uvm/uvm_extern.h>
#include <net/if.h>
#include <net/if_ether.h>
#include <net/if_media.h>
#include <sys/cpu.h>
#include <sys/intr.h>
#include <sys/bus.h>
#include <dev/ic/lancereg.h>
#include <dev/ic/lancevar.h>
#include <dev/ic/am7990reg.h>
#include <dev/ic/am7990var.h>
#include <dev/mca/mcareg.h>
#include <dev/mca/mcavar.h>
#include <dev/mca/mcadevs.h>
#include <dev/mca/if_lereg.h>
int le_mca_match(device_t, cfdata_t, void *);
void le_mca_attach(device_t, device_t, void *);
struct le_mca_softc {
struct am7990_softc sc_am7990; /* glue to MI code */
void *sc_ih;
bus_space_tag_t sc_memt;
bus_space_handle_t sc_memh;
};
static void le_mca_wrcsr(struct lance_softc *, uint16_t, uint16_t);
static uint16_t le_mca_rdcsr(struct lance_softc *, uint16_t);
static void le_mca_hwreset(struct lance_softc *);
static int le_mca_intredge(void *);
static void le_mca_copytobuf(struct lance_softc *, void *, int, int);
static void le_mca_copyfrombuf(struct lance_softc *, void *, int, int);
static void le_mca_zerobuf(struct lance_softc *, int, int);
static inline void le_mca_wrreg(struct le_mca_softc *, int, int);
#define le_mca_set_RAP(sc, reg_number) \
le_mca_wrreg(sc, reg_number, RAP | REGWRITE)
CFATTACH_DECL_NEW(le_mca, sizeof(struct le_mca_softc),
le_mca_match, le_mca_attach, NULL, NULL);
/* SKNET MC+ POS mapping */
static const u_int8_t sknet_mcp_irq[] = {
3, 5, 10, 11
};
static const u_int8_t sknet_mcp_media[] = {
IFM_ETHER|IFM_10_2,
IFM_ETHER|IFM_10_T,
IFM_ETHER|IFM_10_5,
0
};
int
le_mca_match(device_t parent, cfdata_t cf, void *aux)
{
struct mca_attach_args *ma = aux;
switch(ma->ma_id) {
case MCA_PRODUCT_SKNETPER:
case MCA_PRODUCT_SKNETG:
return (1);
}
return (0);
}
void
le_mca_attach(device_t parent, device_t self, void *aux)
{
struct le_mca_softc *lesc = device_private(self);
struct lance_softc *sc = &lesc->sc_am7990.lsc;
struct mca_attach_args *ma = aux;
int i, pos2, pos3, pos4, irq, membase, supmedia=0;
const char *typestr;
sc->sc_dev = self;
/*
* SKNET Personal:
*
* POS register 2: (adf pos0)
*
* 7 6 5 4 3 2 1 0
* | \___/ \__ enable: 0=adapter disabled, 1=adapter enabled
* \ \____ Memory: 0xC0000-0xC3FFF + XX*0x4000
* \________ IRQ: 0=10 1=11
*
*
* SKNET MC+:
* POS register 2: (adf pos0)
*
* 7 6 5 4 3 2 1 0
* \___/ \ \__ enable: 0=adapter disabled, 1=adapter enabled
* \ \___ BootEPROM disable
* \_____ BootEPROM start address: 0xC0000 + XX*0x4000
*
* POS register 3: (adf pos1)
*
* 7 6 5 4 3 2 1 0
* 0 0 1 1 \_____/
* \__ RAM: 0xC0000 + XX*0x4000
*
* POS register 4: (adf pos2)
*
* 7 6 5 4 3 2 1 0
* \_/ \_/ \_/
* \ \ \__ Need to be reset to 0 0 after boot
* \ \_____ IRQ: 00=3 01=5 10=10 11=11
* \____________ Medium: 00=BNC 01=UTP 10=AUI 11=not allowed
*/
switch (ma->ma_id) {
case MCA_PRODUCT_SKNETPER:
typestr = "Personal MC2";
pos2 = mca_conf_read(ma->ma_mc, ma->ma_slot, 2);
irq = (pos2 & (1<<4)) ? 11 : 10;
membase = 0xc0000 + ((pos2 & 0x0e) >> 1) * 0x4000;
break;
case MCA_PRODUCT_SKNETG:
typestr = "MC2+";
/*
* SKNET MC+ needs the driver to clear 0, 1 bits of pos4
* and explicitly set the enable bit. Somebody at Syskonnect
* was obviously misguided when the card was designed ...
*/
pos3 = mca_conf_read(ma->ma_mc, ma->ma_slot, 3);
pos4 = mca_conf_read(ma->ma_mc, ma->ma_slot, 4);
if ((pos4 & 0x03) != 0) {
/* clear the bits 0, 1 */
mca_conf_write(ma->ma_mc, ma->ma_slot, 4,
pos4 & ~0x03);
}
pos2 = mca_conf_read(ma->ma_mc, ma->ma_slot, 2);
if ((pos2 & 0x01) == 0) {
/* enable the card */
mca_conf_write(ma->ma_mc, ma->ma_slot, 2, pos2 | 0x01);
}
/* get irq and memory base */
irq = sknet_mcp_irq[(pos4 & 0x0c) >> 2];
membase = 0xc0000 + ((pos3 & 0x0f) * 0x4000);
/* Get configured media type */
supmedia = sknet_mcp_media[(pos4 & 0xc0) >> 6];
break;
default:
aprint_error(": unknown product %d\n", ma->ma_id);
return;
}
lesc->sc_memt = ma->ma_memt;
if (bus_space_map(lesc->sc_memt, membase, LE_MCA_MEMSIZE,
0, &lesc->sc_memh)) {
aprint_error(": can't map memory\n");
return;
}
aprint_normal(" slot %d irq %d: SKNET %s Ethernet\n",
ma->ma_slot + 1, irq, typestr);
/*
* Extract the physical MAC address from the ROM.
*/
for (i = 0; i < ETHER_ADDR_LEN; i++)
sc->sc_enaddr[i] = bus_space_read_1(lesc->sc_memt,
lesc->sc_memh, LE_PROMOFF + i * 2);
sc->sc_conf3 = LE_C3_ACON;
sc->sc_addr = 0;
sc->sc_memsize = LE_MCA_RAMSIZE;
sc->sc_copytodesc = le_mca_copytobuf;
sc->sc_copyfromdesc = le_mca_copyfrombuf;
sc->sc_copytobuf = le_mca_copytobuf;
sc->sc_copyfrombuf = le_mca_copyfrombuf;
sc->sc_zerobuf = le_mca_zerobuf;
sc->sc_rdcsr = le_mca_rdcsr;
sc->sc_wrcsr = le_mca_wrcsr;
sc->sc_hwinit = NULL;
sc->sc_hwreset = le_mca_hwreset;
/*
* This is merely cosmetic since it's not possible to switch
* the media anyway, even for MC2+.
*/
if (supmedia != 0) {
sc->sc_supmedia = &supmedia;
sc->sc_nsupmedia = 1;
sc->sc_defaultmedia = supmedia;
}
lesc->sc_ih = mca_intr_establish(ma->ma_mc, irq, IPL_NET,
le_mca_intredge, sc);
if (lesc->sc_ih == NULL) {
aprint_error_dev(self,
"couldn't establish interrupt handler\n");
return;
}
aprint_normal("%s", device_xname(self));
am7990_config(&lesc->sc_am7990);
}
/*
* Controller interrupt.
*/
int
le_mca_intredge(void *arg)
{
/*
* We could check the IRQ bit of LE_PORT, but it seems to be unset
* at this time anyway.
*/
if (am7990_intr(arg) == 0)
return (0);
for(;;)
if (am7990_intr(arg) == 0)
return (1);
}
/*
* Push a value to LANCE controller.
*/
static inline void
le_mca_wrreg(struct le_mca_softc *sc, int val, int type)
{
/*
* This follows steps in SKNET Personal/MC2+ docs:
* 1. write reg. number to LANCE register
* 2. write value RESET | type to port
* 3. flag REGDO
* 4. wait until REGREQ is cleared
*/
if ((type & REGREAD) == 0)
bus_space_write_2(sc->sc_memt, sc->sc_memh, LE_LANCEREG, val);
bus_space_write_1(sc->sc_memt, sc->sc_memh, LE_PORT,
RESET | type);
bus_space_write_1(sc->sc_memt, sc->sc_memh, LE_REGIO,
REGDO);
/* Delay here doesn't seem to be necessary */
/* delay(1); */
while (bus_space_read_1(sc->sc_memt, sc->sc_memh, LE_PORT) & REGREQ)
;
}
static void
le_mca_wrcsr(struct lance_softc *sc, uint16_t port, uint16_t val)
{
struct le_mca_softc *lsc = (struct le_mca_softc *)sc;
le_mca_set_RAP(lsc, port);
le_mca_wrreg(lsc, val, RDATA | REGWRITE);
}
static uint16_t
le_mca_rdcsr(struct lance_softc *sc, uint16_t port)
{
struct le_mca_softc *lsc = (struct le_mca_softc *)sc;
le_mca_set_RAP(lsc, port);
le_mca_wrreg(lsc, 0, RDATA | REGREAD);
return (bus_space_read_2(lsc->sc_memt, lsc->sc_memh, LE_LANCEREG));
}
static void
le_mca_hwreset(struct lance_softc *sc)
{
struct le_mca_softc *lsc = (struct le_mca_softc *)sc;
bus_space_write_1(lsc->sc_memt, lsc->sc_memh, LE_PORT, 0);
delay(5); /* Delay >= 5 microseconds */
bus_space_write_1(lsc->sc_memt, lsc->sc_memh, LE_PORT, RESET);
}
static void
le_mca_copytobuf(struct lance_softc *sc, void *from, int boff, int len)
{
struct le_mca_softc *lsc = (struct le_mca_softc *)sc;
bus_space_write_region_1(lsc->sc_memt, lsc->sc_memh, boff,
from, len);
}
static void
le_mca_copyfrombuf(struct lance_softc *sc, void *to, int boff, int len)
{
struct le_mca_softc *lsc = (struct le_mca_softc *)sc;
bus_space_read_region_1(lsc->sc_memt, lsc->sc_memh, boff,
to, len);
}
static void
le_mca_zerobuf(struct lance_softc *sc, int boff, int len)
{
struct le_mca_softc *lsc = (struct le_mca_softc *)sc;
bus_space_set_region_1(lsc->sc_memt, lsc->sc_memh, boff,
0x00, len);
}