/*      $OpenBSD: if_le_isa.c,v 1.23 2022/04/06 18:59:28 naddy Exp $    */
/*      $NetBSD: if_le_isa.c,v 1.2 1996/05/12 23:52:56 mycroft Exp $    */

/*-
 * Copyright (c) 1995 Charles M. Hannum.  All rights reserved.
 * Copyright (c) 1992, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Ralph Campbell and Rick Macklem.
 *
 * 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. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
 *
 *      @(#)if_le.c     8.2 (Berkeley) 11/16/93
 */

#include "bpfilter.h"
#include "isadma.h"

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

#include <netinet/in.h>
#include <netinet/if_ether.h>

#include <machine/cpu.h>
#include <machine/intr.h>

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

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

#include <dev/isa/if_levar.h>

static char *card_type[] =
    { "unknown", "BICC Isolan", "NE2100", "DEPCA", "PCnet-ISA" };

int     le_isa_probe(struct device *, void *, void *);
void    le_isa_attach(struct device *, struct device *, void *);

const struct cfattach le_isa_ca = {
        sizeof(struct le_softc), le_isa_probe, le_isa_attach
};

int     depca_isa_probe(struct le_softc *, struct isa_attach_args *);
int     ne2100_isa_probe(struct le_softc *, struct isa_attach_args *);
int     bicc_isa_probe(struct le_softc *, struct isa_attach_args *);
int     lance_isa_probe(struct lance_softc *);

int
le_isa_probe(struct device *parent, void *match, void *aux)
{
        struct le_softc *lesc = match;
        struct isa_attach_args *ia = aux;
        u_int8_t bogusether[ETHER_ADDR_LEN] = { 255, 255, 255, 255, 255, 255 };

#if NISADMA == 0
        if (ia->ia_drq != DRQUNK) {
                printf("cannot support dma lance devices\n");
                return 0;
        }
#endif

        if (bicc_isa_probe(lesc, ia) == 0 && ne2100_isa_probe(lesc, ia) == 0 &&
            depca_isa_probe(lesc, ia) == 0)
                return (0);

        if (bcmp(lesc->sc_am7990.lsc.sc_arpcom.ac_enaddr, bogusether,
            sizeof(bogusether)) == 0)
                return (0);

        return (1);
}

int
depca_isa_probe(struct le_softc *lesc, struct isa_attach_args *ia)
{
        struct lance_softc *sc = &lesc->sc_am7990.lsc;
        bus_space_tag_t iot = lesc->sc_iot;
        bus_space_handle_t ioh = lesc->sc_ioh;
        int iosize = 16;
        int port;

#if 0
        u_long sum, rom_sum;
        u_char x;
#endif
        int i;

        if (bus_space_map(iot, ia->ia_iobase, iosize, 0, &ioh))
                return (0);
        lesc->sc_iot = iot;
        lesc->sc_ioh = ioh;
        lesc->sc_rap = DEPCA_RAP;
        lesc->sc_rdp = DEPCA_RDP;
        lesc->sc_card = DEPCA;

        if (lance_isa_probe(sc) == 0) {
                bus_space_unmap(iot, ioh, iosize);
                return 0;
        }

        bus_space_write_1(iot, ioh, DEPCA_CSR, DEPCA_CSR_DUM);

        /*
         * Extract the physical MAC address from the ROM.
         *
         * The address PROM is 32 bytes wide, and we access it through
         * a single I/O port.  On each read, it rotates to the next
         * position.  We find the ethernet address by looking for a
         * particular sequence of bytes (0xff, 0x00, 0x55, 0xaa, 0xff,
         * 0x00, 0x55, 0xaa), and then reading the next 8 bytes (the
         * ethernet address and a checksum).
         *
         * It appears that the PROM can be at one of two locations, so
         * we just try both.
         */
        port = DEPCA_ADP;
        for (i = 0; i < 32; i++)
                if (bus_space_read_1(iot, ioh, port) == 0xff &&
                    bus_space_read_1(iot, ioh, port) == 0x00 &&
                    bus_space_read_1(iot, ioh, port) == 0x55 &&
                    bus_space_read_1(iot, ioh, port) == 0xaa &&
                    bus_space_read_1(iot, ioh, port) == 0xff &&
                    bus_space_read_1(iot, ioh, port) == 0x00 &&
                    bus_space_read_1(iot, ioh, port) == 0x55 &&
                    bus_space_read_1(iot, ioh, port) == 0xaa)
                        goto found;
        port = DEPCA_ADP + 1;
        for (i = 0; i < 32; i++)
                if (bus_space_read_1(iot, ioh, port) == 0xff &&
                    bus_space_read_1(iot, ioh, port) == 0x00 &&
                    bus_space_read_1(iot, ioh, port) == 0x55 &&
                    bus_space_read_1(iot, ioh, port) == 0xaa &&
                    bus_space_read_1(iot, ioh, port) == 0xff &&
                    bus_space_read_1(iot, ioh, port) == 0x00 &&
                    bus_space_read_1(iot, ioh, port) == 0x55 &&
                    bus_space_read_1(iot, ioh, port) == 0xaa)
                        goto found;
        printf("%s: address not found\n", sc->sc_dev.dv_xname);
        return 0;

found:
        for (i = 0; i < sizeof(sc->sc_arpcom.ac_enaddr); i++)
                sc->sc_arpcom.ac_enaddr[i] = bus_space_read_1(iot, ioh, port);

#if 0
        sum =
            (sc->sc_arpcom.ac_enaddr[0] <<  2) +
            (sc->sc_arpcom.ac_enaddr[1] << 10) +
            (sc->sc_arpcom.ac_enaddr[2] <<  1) +
            (sc->sc_arpcom.ac_enaddr[3] <<  9) +
            (sc->sc_arpcom.ac_enaddr[4] <<  0) +
            (sc->sc_arpcom.ac_enaddr[5] <<  8);
        sum = (sum & 0xffff) + (sum >> 16);
        sum = (sum & 0xffff) + (sum >> 16);

        rom_sum = bus_space_read_1(iot, ioh, port);
        rom_sum |= bus_space_read_1(iot, ioh, port << 8);

        if (sum != rom_sum) {
                printf("%s: checksum mismatch; calculated %04x != read %04x",
                    sc->sc_dev.dv_xname, sum, rom_sum);
                bus_space_unmap(iot, ioh, iosize);
                return 0;
        }
#endif

        bus_space_write_1(iot, ioh, DEPCA_CSR, DEPCA_CSR_NORMAL);

        ia->ia_iosize = iosize;
        ia->ia_drq = DRQUNK;
        bus_space_unmap(iot, ioh, ia->ia_iosize);
        return 1;
}

int
ne2100_isa_probe(struct le_softc *lesc, struct isa_attach_args *ia)
{
        struct lance_softc *sc = &lesc->sc_am7990.lsc;
        bus_space_tag_t iot = lesc->sc_iot;
        bus_space_handle_t ioh = lesc->sc_ioh;
        int iosize = 24;
        int i;

        if (bus_space_map(iot, ia->ia_iobase, iosize, 0, &ioh))
                return (0);
        lesc->sc_iot = iot;
        lesc->sc_ioh = ioh;
        lesc->sc_rap = NE2100_RAP;
        lesc->sc_rdp = NE2100_RDP;
        lesc->sc_card = NE2100;

        if (lance_isa_probe(sc) == 0) {
                bus_space_unmap(iot, ioh, iosize);
                return 0;
        }

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

        ia->ia_iosize = iosize;
        bus_space_unmap(iot, ioh, ia->ia_iosize);
        return 1;
}

int
bicc_isa_probe(struct le_softc *lesc, struct isa_attach_args *ia)
{
        struct lance_softc *sc = &lesc->sc_am7990.lsc;
        bus_space_handle_t ioh;
        bus_space_tag_t iot = ia->ia_iot;
        int iosize = 16;
        int i;

        if (bus_space_map(iot, ia->ia_iobase, iosize, 0, &ioh))
                return (0);
        lesc->sc_iot = iot;
        lesc->sc_ioh = ioh;
        lesc->sc_rap = BICC_RAP;
        lesc->sc_rdp = BICC_RDP;
        lesc->sc_card = BICC;

        if (lance_isa_probe(sc) == 0) {
                bus_space_unmap(iot, ioh, iosize);
                return 0;
        }

        /*
         * Extract the physical MAC address from the ROM.
         */
        for (i = 0; i < sizeof(sc->sc_arpcom.ac_enaddr); i++)
                sc->sc_arpcom.ac_enaddr[i] = bus_space_read_1(iot, ioh, i * 2);

        ia->ia_iosize = iosize;
        bus_space_unmap(iot, ioh, ia->ia_iosize);
        return 1;
}

/*
 * Determine which chip is present on the card.
 */
int
lance_isa_probe(struct lance_softc *sc)
{

        /* Stop the LANCE chip and put it in a known state. */
        le_isa_wrcsr(sc, LE_CSR0, LE_C0_STOP);
        delay(100);

        if (le_isa_rdcsr(sc, LE_CSR0) != LE_C0_STOP)
                return 0;

        le_isa_wrcsr(sc, LE_CSR3, sc->sc_conf3);
        return 1;
}

void
le_isa_attach(struct device *parent, struct device *self,
    void *aux)
{
        struct le_softc *lesc = (void *)self;
        struct lance_softc *sc = &lesc->sc_am7990.lsc;
        struct isa_attach_args *ia = aux;
        bus_space_tag_t iot = ia->ia_iot;
        bus_space_handle_t ioh;

        if (bus_space_map(iot, ia->ia_iobase, ia->ia_iosize, 0, &ioh))
                panic("%s: can't map I/O-ports", sc->sc_dev.dv_xname);
        lesc->sc_iot = iot;
        lesc->sc_ioh = ioh;

        printf(": %s Ethernet\n", card_type[lesc->sc_card]);

        if (lesc->sc_card == DEPCA) {
                u_char *mem, val;
                int i;

                mem = sc->sc_mem = ISA_HOLE_VADDR(ia->ia_maddr);

                val = 0xff;
                for (;;) {
                        for (i = 0; i < ia->ia_msize; i++)
                                mem[i] = val;
                        for (i = 0; i < ia->ia_msize; i++)
                                if (mem[i] != val) {
                                        printf("%s: failed to clear memory\n",
                                            sc->sc_dev.dv_xname);
                                        return;
                                }
                        if (val == 0x00)
                                break;
                        val -= 0x55;
                }

                sc->sc_conf3 = LE_C3_ACON;
                sc->sc_addr = 0;
                sc->sc_memsize = ia->ia_msize;
        } else {
                sc->sc_mem = malloc(16384, M_DEVBUF, M_NOWAIT);
                if (sc->sc_mem == 0) {
                        printf("%s: couldn't allocate memory for card\n",
                            sc->sc_dev.dv_xname);
                        return;
                }

                sc->sc_conf3 = 0;
                sc->sc_addr = kvtop(sc->sc_mem);
                sc->sc_memsize = 16384;
        }

        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_isa_rdcsr;
        sc->sc_wrcsr = le_isa_wrcsr;
        sc->sc_hwreset = NULL;
        sc->sc_hwinit = NULL;

        printf("%s", sc->sc_dev.dv_xname);
        am7990_config(&lesc->sc_am7990);

#if NISADMA > 0
        if (ia->ia_drq != DRQUNK)
                isadma_cascade(ia->ia_drq);
#endif

        lesc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq, IST_EDGE,
            IPL_NET, le_isa_intredge, sc, sc->sc_dev.dv_xname);
}