/*      $NetBSD: if_le.c,v 1.63 2024/01/16 05:48:28 thorpej Exp $       */

/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum and by Jason R. Thorpe.
*
* 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) 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 <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: if_le.c,v 1.63 2024/01/16 05:48:28 thorpej Exp $");

#include "opt_inet.h"

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

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

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

#include <hp300/dev/diovar.h>
#include <hp300/dev/diodevs.h>
#include <hp300/dev/if_lereg.h>

#include "opt_useleds.h"

#ifdef USELEDS
#include <hp300/hp300/leds.h>
#endif

struct  le_softc {
       struct  am7990_softc sc_am7990; /* glue to MI code */

       bus_space_tag_t sc_bst;

       bus_space_handle_t sc_bsh0;     /* DIO registers */
       bus_space_handle_t sc_bsh1;     /* LANCE registers */
       bus_space_handle_t sc_bsh2;     /* buffer area */
};

static int      lematch(device_t, cfdata_t, void *);
static void     leattach(device_t, device_t, void *);

CFATTACH_DECL_NEW(le, sizeof(struct le_softc),
   lematch, leattach, NULL, NULL);

static int      leintr(void *);

#if defined(_KERNEL_OPT)
#include "opt_ddb.h"
#endif

static void     le_copytobuf(struct lance_softc *, void *, int, int);
static void     le_copyfrombuf(struct lance_softc *, void *, int, int);
static void     le_zerobuf(struct lance_softc *, int, int);

/* offsets for:    ID,   REGS,    MEM,  NVRAM */
static const int lestd[] = { 0, 0x4000, 0x8000, 0xC008 };

static void
lewrcsr(struct lance_softc *sc, uint16_t port, uint16_t val)
{
       struct le_softc *lesc = (struct le_softc *)sc;
       bus_space_tag_t bst = lesc->sc_bst;
       bus_space_handle_t bsh0 = lesc->sc_bsh0;
       bus_space_handle_t bsh1 = lesc->sc_bsh1;

       do {
               bus_space_write_2(bst, bsh1, LER1_RAP, port);
       } while ((bus_space_read_1(bst, bsh0, LER0_STATUS) & LE_ACK) == 0);
       do {
               bus_space_write_2(bst, bsh1, LER1_RDP, val);
       } while ((bus_space_read_1(bst, bsh0, LER0_STATUS) & LE_ACK) == 0);
}

static uint16_t
lerdcsr(struct lance_softc *sc, uint16_t port)
{
       struct le_softc *lesc = (struct le_softc *)sc;
       bus_space_tag_t bst = lesc->sc_bst;
       bus_space_handle_t bsh0 = lesc->sc_bsh0;
       bus_space_handle_t bsh1 = lesc->sc_bsh1;
       uint16_t val;

       do {
               bus_space_write_2(bst, bsh1, LER1_RAP, port);
       } while ((bus_space_read_1(bst, bsh0, LER0_STATUS) & LE_ACK) == 0);
       do {
               val = bus_space_read_2(bst, bsh1, LER1_RDP);
       } while ((bus_space_read_1(bst, bsh0, LER0_STATUS) & LE_ACK) == 0);

       return val;
}

static int
lematch(device_t parent, cfdata_t cf, void *aux)
{
       struct dio_attach_args *da = aux;

       if (da->da_id == DIO_DEVICE_ID_LAN)
               return 1;
       return 0;
}

/*
* Interface exists: make available by filling in network interface
* record.  System will initialize the interface when it is ready
* to accept packets.
*/
static void
leattach(device_t parent, device_t self, void *aux)
{
       struct le_softc *lesc = device_private(self);
       struct lance_softc *sc = &lesc->sc_am7990.lsc;
       struct dio_attach_args *da = aux;
       bus_space_tag_t bst = da->da_bst;
       bus_space_handle_t bsh0, bsh1, bsh2;
       bus_size_t offset;
       int i;

       sc->sc_dev = self;

       if (bus_space_map(bst, (bus_addr_t)dio_scodetopa(da->da_scode),
           da->da_size, 0, &bsh0)) {
               aprint_error(": can't map LANCE registers\n");
               return;
       }

       if (bus_space_subregion(bst, bsh0, lestd[1], LER1_SIZE, &bsh1)) {
               aprint_error(": can't subregion LANCE space\n");
               return;
       }

       if (bus_space_subregion(bst, bsh0, lestd[2], LE_BUFSIZE, &bsh2)) {
               aprint_error(": can't subregion buffer space\n");
               return;
       }

       lesc->sc_bst = bst;
       lesc->sc_bsh0 = bsh0;
       lesc->sc_bsh1 = bsh1;
       lesc->sc_bsh2 = bsh2;

       bus_space_write_1(bst, bsh0, LER0_ID, 0xff);
       DELAY(100);

       sc->sc_conf3 = LE_C3_BSWP;
       sc->sc_addr = 0;
       sc->sc_memsize = LE_BUFSIZE;

       /*
        * Read the ethernet address off the board, one nibble at a time.
        */
       offset = lestd[3];
       for (i = 0; i < sizeof(sc->sc_enaddr); i++) {
               sc->sc_enaddr[i] =
                   (bus_space_read_1(bst, bsh0, ++offset) & 0xf) << 4;
               offset++;
               sc->sc_enaddr[i] |=
                   (bus_space_read_1(bst, bsh0, ++offset) & 0xf);
               offset++;
       }

       sc->sc_copytodesc = le_copytobuf;
       sc->sc_copyfromdesc = le_copyfrombuf;
       sc->sc_copytobuf = le_copytobuf;
       sc->sc_copyfrombuf = le_copyfrombuf;
       sc->sc_zerobuf = le_zerobuf;

       sc->sc_rdcsr = lerdcsr;
       sc->sc_wrcsr = lewrcsr;
       sc->sc_hwinit = NULL;

       am7990_config(&lesc->sc_am7990);

       /* Establish the interrupt handler. */
       (void) dio_intr_establish(leintr, sc, da->da_ipl, ISRPRI_NET);
       bus_space_write_1(bst, bsh0, LER0_STATUS, LE_IE);
}

static int
leintr(void *arg)
{
       struct lance_softc *sc = arg;
#ifdef USELEDS
       uint16_t isr;

       isr = lerdcsr(sc, LE_CSR0);

       if ((isr & LE_C0_INTR) == 0)
               return 0;

       if (isr & LE_C0_RINT)
               ledcontrol(0, 0, LED_LANRCV);

       if (isr & LE_C0_TINT)
               ledcontrol(0, 0, LED_LANXMT);
#endif /* USELEDS */

       return am7990_intr(sc);
}

static void
le_copytobuf(struct lance_softc *sc, void *from, int boff, int len)
{
       struct le_softc *lesc = (struct le_softc *)sc;

       bus_space_write_region_1(lesc->sc_bst, lesc->sc_bsh2, boff, from, len);
}

static void
le_copyfrombuf(struct lance_softc *sc, void *to, int boff, int len)
{
       struct le_softc *lesc = (struct le_softc *)sc;

       bus_space_read_region_1(lesc->sc_bst, lesc->sc_bsh2, boff, to, len);
}

static void
le_zerobuf(struct lance_softc *sc, int boff, int len)
{
       struct le_softc *lesc = (struct le_softc *)sc;

       bus_space_set_region_1(lesc->sc_bst, lesc->sc_bsh2, boff, 0, len);
}

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