* Copyright (C) 1997 Allen Briggs

/* $NetBSD: if_sn_obio.c,v 1.29 2021/02/20 09:36:30 rin Exp $ */

/*
* Copyright (C) 1997 Allen Briggs
* 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 Allen Briggs
* 4. The name of the author 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 <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_sn_obio.c,v 1.29 2021/02/20 09:36:30 rin Exp $");

#include <sys/param.h>
#include <sys/device.h>
#include <sys/systm.h>
#include <sys/ioctl.h>

#include <sys/rndsource.h>

#include <net/if.h>
#include <net/if_ether.h>

#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/viareg.h>

#include <dev/ic/dp83932reg.h>
#include <dev/ic/dp83932var.h>

#include <mac68k/obio/obiovar.h>
#include <mac68k/dev/if_snvar.h>

#define SONIC_REG_BASE 0x50F0A000
#define SONIC_PROM_BASE 0x50F08000
#define SONIC_SLOTNO 9

static int sn_obio_match(device_t, cfdata_t, void *);
static void sn_obio_attach(device_t, device_t, void *);
static int sn_obio_getaddr(struct sonic_softc *, uint8_t *);
static int sn_obio_getaddr_kludge(struct sonic_softc *, uint8_t *);

CFATTACH_DECL_NEW(sn_obio, sizeof(struct sonic_softc),
sn_obio_match, sn_obio_attach, NULL, NULL);

static int
sn_obio_match(device_t parent, cfdata_t cf, void *aux)
{
struct obio_attach_args *oa = aux;
bus_space_handle_t bsh;
int found = 0;

if (!mac68k_machine.sonic)
return 0;

if (bus_space_map(oa->oa_tag,
SONIC_REG_BASE, SONIC_NREGS * 4, 0, &bsh))
return 0;

if (mac68k_bus_space_probe(oa->oa_tag, bsh, 0, 4))
found = 1;

bus_space_unmap(oa->oa_tag, bsh, SONIC_NREGS * 4);

return found;
}

/*
* Install interface into kernel networking data structures
*/
static void
sn_obio_attach(device_t parent, device_t self, void *aux)
{
struct sonic_softc *sc = device_private(self);
struct obio_attach_args *oa = aux;
uint8_t myaddr[ETHER_ADDR_LEN];
int i;

sc->sc_dev = self;
sc->sc_st = oa->oa_tag;
sc->sc_dmat = oa->oa_dmat;

if (bus_space_map(sc->sc_st,
SONIC_REG_BASE, SONIC_NREGS * 4, 0, &sc->sc_sh)) {
aprint_error(": failed to map space for SONIC regs.\n");
return;
}

/* regs are addressed as words, big-endian. */
for (i = 0; i < SONIC_NREGS; i++) {
sc->sc_regmap[i] = (bus_size_t)((i * 4) + 2);
}

sc->sc_bigendian = 1;

sc->sc_dcr = DCR_BMS | DCR_RFT1 | DCR_TFT0;
sc->sc_dcr2 = 0;

switch (current_mac_model->machineid) {
case MACH_MACC610:
case MACH_MACC650:
case MACH_MACQ610:
case MACH_MACQ650:
case MACH_MACQ700:
case MACH_MACQ800:
case MACH_MACQ900:
case MACH_MACQ950:
sc->sc_dcr |= DCR_EXBUS;
sc->sc_32bit = 1;
break;

case MACH_MACLC575:
case MACH_MACP580:
case MACH_MACQ630:
/* Apple Comm Slot cards; assume they are 32 bit */
sc->sc_dcr |= DCR_EXBUS | DCR_USR1 | DCR_USR0;
sc->sc_32bit = 1;
break;

case MACH_MACPB500:
sc->sc_dcr |= DCR_SBUS | DCR_LBR;
sc->sc_32bit = 0; /* 16 bit interface */
break;

default:
aprint_error(": unsupported machine type\n");
return;
}

if (sn_obio_getaddr(sc, myaddr) &&
sn_obio_getaddr_kludge(sc, myaddr)) { /* XXX kludge for PB */
aprint_error(": failed to get MAC address.\n");
bus_space_unmap(sc->sc_st, sc->sc_sh, SONIC_NREGS * 4);
return;
}

aprint_normal(": integrated SONIC Ethernet adapter\n");

if (mac68k_machine.aux_interrupts) {
intr_establish(sonic_intr, (void *)sc, 3);
} else {
add_nubus_intr(SONIC_SLOTNO, (void (*)(void *))sonic_intr,
(void *)sc);
}

sonic_attach(sc, myaddr);
}

static int
sn_obio_getaddr(struct sonic_softc *sc, uint8_t *lladdr)
{
bus_space_handle_t bsh;

if (bus_space_map(sc->sc_st, SONIC_PROM_BASE, PAGE_SIZE, 0, &bsh)) {
aprint_error(": failed to map space to read SONIC address.\n");
aprint_normal("%s:", device_xname(sc->sc_dev));
return -1;
}

if (!mac68k_bus_space_probe(sc->sc_st, bsh, 0, 1)) {
bus_space_unmap(sc->sc_st, bsh, PAGE_SIZE);
return -1;
}

sn_get_enaddr(sc->sc_st, bsh, 0, lladdr);

bus_space_unmap(sc->sc_st, bsh, PAGE_SIZE);

return 0;
}

/*
* Assume that the SONIC was initialized in MacOS. This should go away
* when we can properly get the MAC address on the PBs.
*/
static int
sn_obio_getaddr_kludge(struct sonic_softc *sc, u_int8_t *lladdr)
{
int i, ors = 0;

/* Shut down NIC */
CSR_WRITE(sc, SONIC_CR, CR_RST);

/* For some reason, Apple fills top first. */
CSR_WRITE(sc, SONIC_CEP, 15);

i = CSR_READ(sc, SONIC_CAP2);

ors |= i;
lladdr[5] = i >> 8;
lladdr[4] = i;

i = CSR_READ(sc, SONIC_CAP1);

ors |= i;
lladdr[3] = i >> 8;
lladdr[2] = i;

i = CSR_READ(sc, SONIC_CAP0);

ors |= i;
lladdr[1] = i >> 8;
lladdr[0] = i;

CSR_WRITE(sc, SONIC_CR, 0);

if (ors == 0)
return -1;

return 0;
}