/* $NetBSD: if_sm_isa.c,v 1.24 2018/02/08 09:05:19 dholland Exp $ */

/* $NetBSD: if_sm_isa.c,v 1.24 2018/02/08 09:05:19 dholland Exp $ */

/*-
* Copyright (c) 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* 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.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_sm_isa.c,v 1.24 2018/02/08 09:05:19 dholland Exp $");

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

#include <sys/intr.h>
#include <sys/bus.h>

#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>

#include <dev/ic/smc91cxxreg.h>
#include <dev/ic/smc91cxxvar.h>

#include <dev/isa/isavar.h>

int sm_isa_match(device_t, cfdata_t, void *);
void sm_isa_attach(device_t, device_t, void *);

struct sm_isa_softc {
struct smc91cxx_softc sc_smc; /* real "smc" softc */

/* ISA-specific goo. */
void *sc_ih; /* interrupt cookie */
};

CFATTACH_DECL_NEW(sm_isa, sizeof(struct sm_isa_softc),
sm_isa_match, sm_isa_attach, NULL, NULL);

int
sm_isa_match(device_t parent, cfdata_t match, void *aux)
{
struct isa_attach_args *ia = aux;
bus_space_tag_t iot = ia->ia_iot;
bus_space_handle_t ioh;
u_int16_t tmp;
int rv = 0;
extern const char *smc91cxx_idstrs[];

if (ia->ia_nio < 1)
return (0);
if (ia->ia_nirq < 1)
return (0);

if (ISA_DIRECT_CONFIG(ia))
return (0);

/* Disallow wildcarded values. */
if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
return (0);
if (ia->ia_irq[0].ir_irq == ISA_UNKNOWN_IRQ)
return (0);

/* Map i/o space. */
if (bus_space_map(iot, ia->ia_io[0].ir_addr, SMC_IOSIZE, 0, &ioh))
return (0);

/* Check that high byte of BANK_SELECT is what we expect. */
tmp = bus_space_read_2(iot, ioh, BANK_SELECT_REG_W);
if ((tmp & BSR_DETECT_MASK) != BSR_DETECT_VALUE)
goto out;

/*
* Switch to bank 0 and perform the test again.
* XXX INVASIVE!
*/
bus_space_write_2(iot, ioh, BANK_SELECT_REG_W, 0);
tmp = bus_space_read_2(iot, ioh, BANK_SELECT_REG_W);
if ((tmp & BSR_DETECT_MASK) != BSR_DETECT_VALUE)
goto out;

/*
* Switch to bank 1 and check the base address register.
* XXX INVASIVE!
*/
bus_space_write_2(iot, ioh, BANK_SELECT_REG_W, 1);
tmp = bus_space_read_2(iot, ioh, BASE_ADDR_REG_W);
if (ia->ia_io[0].ir_addr != ((tmp >> 3) & 0x3e0))
goto out;

/*
* Check for a recognized chip id.
* XXX INVASIVE!
*/
bus_space_write_2(iot, ioh, BANK_SELECT_REG_W, 3);
tmp = bus_space_read_2(iot, ioh, REVISION_REG_W);
if (smc91cxx_idstrs[RR_ID(tmp)] == NULL)
goto out;

/*
* Assume we have an SMC91Cxx.
*/
ia->ia_nio = 1;
ia->ia_io[0].ir_size = SMC_IOSIZE;

ia->ia_nirq = 1;

ia->ia_niomem = 0;
ia->ia_ndrq = 0;

rv = 1;

out:
bus_space_unmap(iot, ioh, SMC_IOSIZE);
return (rv);
}

void
sm_isa_attach(device_t parent, device_t self, void *aux)
{
struct sm_isa_softc *isc = device_private(self);
struct smc91cxx_softc *sc = &isc->sc_smc;
struct isa_attach_args *ia = aux;
bus_space_tag_t iot = ia->ia_iot;
bus_space_handle_t ioh;

printf("\n");

/* Map i/o space. */
if (bus_space_map(iot, ia->ia_io[0].ir_addr, SMC_IOSIZE, 0, &ioh))
panic("sm_isa_attach: can't map i/o space");

sc->sc_dev = self;
sc->sc_bst = iot;
sc->sc_bsh = ioh;

/* should always be enabled */
sc->sc_flags |= SMC_FLAGS_ENABLED;

/* XXX Should get Ethernet address from EEPROM!! */

/* Perform generic initialization. */
smc91cxx_attach(sc, NULL);

/* Establish the interrupt handler. */
isc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq,
IST_EDGE, IPL_NET, smc91cxx_intr, sc);
if (isc->sc_ih == NULL)
aprint_error_dev(self, "couldn't establish interrupt handler\n");
}