/*      $NetBSD: if_le_isapnp.c,v 1.37 2022/05/29 10:43:46 rin 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.
 */

/*
 * Copyright (c) 1997 Jonathan Stone <jonathan@NetBSD.org> and
 * Matthias Drochner. 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 Jonathan Stone.
 * 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_le_isapnp.c,v 1.37 2022/05/29 10:43:46 rin 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/cpu.h>
#include <sys/bus.h>
#include <sys/intr.h>

#include <dev/isa/isavar.h>
#include <dev/isa/isadmavar.h>

#include <dev/isapnp/isapnpreg.h>
#include <dev/isapnp/isapnpvar.h>
#include <dev/isapnp/isapnpdevs.h>

#include <dev/ic/lancereg.h>
#include <dev/ic/lancevar.h>
#include <dev/ic/am7990reg.h>
#include <dev/ic/am7990var.h>

#define LE_ISAPNP_MEMSIZE       16384

#define PCNET_SAPROM    0x00
#define PCNET_RDP       0x10
#define PCNET_RAP       0x12

/*
 * Ethernet software status per interface.
 *
 * Each interface is referenced by a network interface structure,
 * ethercom.ec_if, which the routing code uses to locate the interface.
 * This structure contains the output queue for the interface, its address, ...
 */
struct le_isapnp_softc {
        struct  am7990_softc sc_am7990; /* glue to MI code */

        void    *sc_ih;
        bus_space_tag_t sc_iot;         /* space cookie */
        bus_space_handle_t sc_ioh;      /* bus space handle */
        bus_dma_tag_t   sc_dmat;        /* bus dma tag */
        bus_dmamap_t    sc_dmam;        /* bus dma map */
        int     sc_rap, sc_rdp;         /* offsets to LANCE registers */
};

int le_isapnp_match(device_t, cfdata_t, void *);
void le_isapnp_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(le_isapnp, sizeof(struct le_isapnp_softc),
    le_isapnp_match, le_isapnp_attach, NULL, NULL);

int     le_isapnp_intredge(void *);
static void le_isapnp_wrcsr(struct lance_softc *, uint16_t, uint16_t);
static uint16_t le_isapnp_rdcsr(struct lance_softc *, uint16_t);

static void
le_isapnp_wrcsr(struct lance_softc *sc, uint16_t port, uint16_t val)
{
        struct le_isapnp_softc *lesc = (struct le_isapnp_softc *)sc;
        bus_space_tag_t iot = lesc->sc_iot;
        bus_space_handle_t ioh = lesc->sc_ioh;

        bus_space_write_2(iot, ioh, lesc->sc_rap, port);
        bus_space_write_2(iot, ioh, lesc->sc_rdp, val);
}

static uint16_t
le_isapnp_rdcsr(struct lance_softc *sc, uint16_t port)
{
        struct le_isapnp_softc *lesc = (struct le_isapnp_softc *)sc;
        bus_space_tag_t iot = lesc->sc_iot;
        bus_space_handle_t ioh = lesc->sc_ioh;
        uint16_t val;

        bus_space_write_2(iot, ioh, lesc->sc_rap, port);
        val = bus_space_read_2(iot, ioh, lesc->sc_rdp);
        return (val);
}

int
le_isapnp_match(device_t parent, cfdata_t cf, void *aux)
{
        int pri, variant;

        pri = isapnp_devmatch(aux, &isapnp_le_devinfo, &variant);
        if (pri && variant > 0)
                pri = 0;
        return (pri);
}

void
le_isapnp_attach(device_t parent, device_t self, void *aux)
{
        struct le_isapnp_softc *lesc = device_private(self);
        struct lance_softc *sc = &lesc->sc_am7990.lsc;
        struct isapnp_attach_args *ipa = aux;
        bus_space_tag_t iot;
        bus_space_handle_t ioh;
        bus_dma_tag_t dmat;
        bus_dma_segment_t seg;
        int i, rseg, error;

        sc->sc_dev = self;

        if (isapnp_config(ipa->ipa_iot, ipa->ipa_memt, ipa)) {
                aprint_error(": error in region allocation\n");
                return;
        }

        lesc->sc_iot = iot = ipa->ipa_iot;
        lesc->sc_ioh = ioh = ipa->ipa_io[0].h;
        lesc->sc_dmat = dmat = ipa->ipa_dmat;

        lesc->sc_rap = PCNET_RAP;
        lesc->sc_rdp = PCNET_RDP;

        /*
         * Extract the physical MAC address from the ROM.
         */
        for (i = 0; i < sizeof(sc->sc_enaddr); i++)
                sc->sc_enaddr[i] = bus_space_read_1(iot, ioh, PCNET_SAPROM + i);

        /*
         * Allocate a DMA area for the card.
         */
        if (bus_dmamem_alloc(dmat, LE_ISAPNP_MEMSIZE, PAGE_SIZE, 0, &seg, 1,
            &rseg, BUS_DMA_NOWAIT)) {
                aprint_error(": couldn't allocate memory for card\n");
                return;
        }
        if (bus_dmamem_map(dmat, &seg, rseg, LE_ISAPNP_MEMSIZE,
            (void **)&sc->sc_mem, BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) {
                aprint_error(": couldn't map memory for card\n");
                goto bad_free;
        }

        /*
         * Create and load the DMA map for the DMA area.
         */
        if (bus_dmamap_create(dmat, LE_ISAPNP_MEMSIZE, 1,
            LE_ISAPNP_MEMSIZE, 0, BUS_DMA_NOWAIT, &lesc->sc_dmam)) {
                aprint_error(": couldn't create DMA map\n");
                goto bad_unmap;
        }
        if (bus_dmamap_load(dmat, lesc->sc_dmam,
            sc->sc_mem, LE_ISAPNP_MEMSIZE, NULL, BUS_DMA_NOWAIT)) {
                aprint_error(": couldn't load DMA map\n");
                goto bad_destroy;
        }

        sc->sc_conf3 = 0;
        sc->sc_addr = lesc->sc_dmam->dm_segs[0].ds_addr;
        sc->sc_memsize = LE_ISAPNP_MEMSIZE;

        sc->sc_copytodesc = lance_copytobuf_contig;
        sc->sc_copyfromdesc = lance_copyfrombuf_contig;
        sc->sc_copytobuf = lance_copytobuf_contig;
        sc->sc_copyfrombuf = lance_copyfrombuf_contig;
        sc->sc_zerobuf = lance_zerobuf_contig;

        sc->sc_rdcsr = le_isapnp_rdcsr;
        sc->sc_wrcsr = le_isapnp_wrcsr;
        sc->sc_hwinit = NULL;

        if (ipa->ipa_ndrq > 0) {
                if ((error = isa_dmacascade(ipa->ipa_ic,
                    ipa->ipa_drq[0].num)) != 0) {
                        aprint_error(": unable to cascade DRQ, error = %d\n",
                            error);
                        goto bad_destroy;
                }
        }

        lesc->sc_ih = isa_intr_establish(ipa->ipa_ic, ipa->ipa_irq[0].num,
            ipa->ipa_irq[0].type, IPL_NET, le_isapnp_intredge, sc);

        aprint_normal(": %s %s\n", ipa->ipa_devident, ipa->ipa_devclass);

        aprint_normal("%s", device_xname(self));
        am7990_config(&lesc->sc_am7990);

        return;

 bad_destroy:
        bus_dmamap_destroy(dmat, lesc->sc_dmam);
 bad_unmap:
        bus_dmamem_unmap(dmat, sc->sc_mem, LE_ISAPNP_MEMSIZE);
 bad_free:
        bus_dmamem_free(dmat, &seg, rseg);
}


/*
 * Controller interrupt.
 */
int
le_isapnp_intredge(void *arg)
{

        if (am7990_intr(arg) == 0)
                return (0);
        for (;;)
                if (am7990_intr(arg) == 0)
                        return (1);
}