/*      $NetBSD: lasi.c,v 1.6 2025/02/24 20:23:30 andvar Exp $  */

/*      $OpenBSD: lasi.c,v 1.4 2001/06/09 03:57:19 mickey Exp $ */

/*
 * Copyright (c) 1998-2003 Michael Shalayeff
 * 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.
 *
 * 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 OR HIS RELATIVES 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 MIND, 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: lasi.c,v 1.6 2025/02/24 20:23:30 andvar Exp $");

#undef LASIDEBUG

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

#include <sys/bus.h>
#include <machine/iomod.h>
#include <machine/autoconf.h>

#include <hppa/dev/cpudevs.h>

#include <hppa/gsc/gscbusvar.h>

struct lasi_hwr {
        uint32_t lasi_power;
#define LASI_BLINK      0x01
#define LASI_OFF        0x02
        uint32_t lasi_error;
        uint32_t lasi_version;
        uint32_t lasi_reset;
        uint32_t lasi_arbmask;
};

struct lasi_trs {
        uint32_t lasi_irr;      /* int request register */
        uint32_t lasi_imr;      /* int mask register */
        uint32_t lasi_ipr;      /* int pending register */
        uint32_t lasi_icr;      /* int command? register */
        uint32_t lasi_iar;      /* int acquire? register */
};

#define LASI_BANK_SZ    0x200000
#define LASI_REG_INT    0x100000
#define LASI_REG_MISC   0x10c000

struct lasi_softc {
        device_t sc_dev;

        struct hppa_interrupt_register sc_ir;

        struct lasi_hwr volatile *sc_hw;
        struct lasi_trs volatile *sc_trs;
};

int     lasimatch(device_t, cfdata_t, void *);
void    lasiattach(device_t, device_t, void *);

CFATTACH_DECL_NEW(lasi, sizeof(struct lasi_softc),
    lasimatch, lasiattach, NULL, NULL);

extern struct cfdriver lasi_cd;

void    lasi_cold_hook(int);

/*
 * Before a module is matched, this fixes up its gsc_attach_args.
 */
static void lasi_fix_args(void *, struct gsc_attach_args *);
static void
lasi_fix_args(void *_sc, struct gsc_attach_args *ga)
{
        struct lasi_softc *sc = _sc;
        hppa_hpa_t module_offset;

        /*
         * Determine this module's interrupt bit.
         */
        module_offset = ga->ga_hpa - (hppa_hpa_t) sc->sc_trs;
        ga->ga_irq = HPPACF_IRQ_UNDEF;
#define LASI_IRQ(off, irq) if (module_offset == off) ga->ga_irq = irq
        LASI_IRQ(0x2000, 7);    /* lpt */
        LASI_IRQ(0x4000, 13);   /* harmony */
        LASI_IRQ(0x4040, 16);   /* harmony telephone0 */
        LASI_IRQ(0x4060, 17);   /* harmony telephone1 */
        LASI_IRQ(0x5000, 5);    /* com */
        LASI_IRQ(0x6000, 9);    /* osiop */
        LASI_IRQ(0x7000, 8);    /* ie */
        LASI_IRQ(0x8000, 26);   /* pckbc */
        LASI_IRQ(0xa000, 20);   /* fdc */
#undef LASI_IRQ

        /*
         * If this is the Ethernet adapter, get its Ethernet address.
         */
        if (module_offset == 0x7000) {
                pdcproc_lan_station_id(ga->ga_ether_address,
                    sizeof(ga->ga_ether_address), ga->ga_hpa);
        }
}

int
lasimatch(device_t parent, cfdata_t cf, void *aux)
{
        struct confargs *ca = aux;

        if (ca->ca_type.iodc_type != HPPA_TYPE_BHA ||
            ca->ca_type.iodc_sv_model != HPPA_BHA_LASI)
                return 0;

        /*
         * Forcibly mask the HPA down to the start of the LASI
         * chip address space.
         */
        ca->ca_hpa &= ~(LASI_BANK_SZ - 1);

        return 1;
}

void
lasiattach(device_t parent, device_t self, void *aux)
{
        struct confargs *ca = aux;
        struct lasi_softc *sc = device_private(self);
        struct gsc_attach_args ga;
        struct cpu_info *ci = &cpus[0];
        bus_space_handle_t ioh;
        int s;

        sc->sc_dev = self;
        /*
         * Map the LASI interrupt registers.
         */
        if (bus_space_map(ca->ca_iot, ca->ca_hpa + LASI_REG_INT,
                          sizeof(struct lasi_trs), 0, &ioh)) {
                aprint_error(": can't map interrupt registers\n");
                return;
        }
        sc->sc_trs = (struct lasi_trs *)ioh;

        /*
         * Map the LASI miscellaneous registers.
         */
        if (bus_space_map(ca->ca_iot, ca->ca_hpa + LASI_REG_MISC,
                          sizeof(struct lasi_hwr), 0, &ioh)) {
                aprint_error(": can't map misc registers\n");
                return;
        }
        sc->sc_hw = (struct lasi_hwr *)ioh;

        /* XXX should we reset the chip here? */

        aprint_normal(": rev %d.%d\n", (sc->sc_hw->lasi_version & 0xf0) >> 4,
                sc->sc_hw->lasi_version & 0xf);

        ca->ca_irq = hppa_intr_allocate_bit(&ci->ci_ir, ca->ca_irq);
        if (ca->ca_irq == HPPACF_IRQ_UNDEF) {
                aprint_error(": can't allocate interrupt\n");
                return;
        }

        /* interrupts guts */
        s = splhigh();
        sc->sc_trs->lasi_iar = ci->ci_hpa | (31 - ca->ca_irq);
        sc->sc_trs->lasi_icr = 0;
        sc->sc_trs->lasi_imr = 0;
        (void)sc->sc_trs->lasi_irr;

        /* Establish the interrupt register. */
        hppa_interrupt_register_establish(ci, &sc->sc_ir);
        sc->sc_ir.ir_name = device_xname(self);
        sc->sc_ir.ir_mask = &sc->sc_trs->lasi_imr;
        sc->sc_ir.ir_req = &sc->sc_trs->lasi_irr;
        splx(s);

        /* Attach the GSC bus. */
        ga.ga_ca = *ca; /* clone from us */
        if (strcmp(device_xname(parent), "mainbus0") == 0) {
                ga.ga_dp.dp_bc[0] = ga.ga_dp.dp_bc[1];
                ga.ga_dp.dp_bc[1] = ga.ga_dp.dp_bc[2];
                ga.ga_dp.dp_bc[2] = ga.ga_dp.dp_bc[3];
                ga.ga_dp.dp_bc[3] = ga.ga_dp.dp_bc[4];
                ga.ga_dp.dp_bc[4] = ga.ga_dp.dp_bc[5];
                ga.ga_dp.dp_bc[5] = ga.ga_dp.dp_mod;
                ga.ga_dp.dp_mod = 0;
        }

        ga.ga_name = "gsc";
        ga.ga_ir = &sc->sc_ir;
        ga.ga_fix_args = lasi_fix_args;
        ga.ga_fix_args_cookie = sc;
        ga.ga_scsi_target = 7; /* XXX */
        config_found(self, &ga, gscprint, CFARGS_NONE);

        /* could be already set by power(4) */
        if (!cold_hook)
                cold_hook = lasi_cold_hook;
}

void
lasi_cold_hook(int on)
{
        struct lasi_softc *sc = device_private(lasi_cd.cd_devs[0]);

        if (!sc)
                return;

        switch (on) {
        case HPPA_COLD_COLD:
                sc->sc_hw->lasi_power = LASI_BLINK;
                break;
        case HPPA_COLD_HOT:
                sc->sc_hw->lasi_power = 0;
                break;
        case HPPA_COLD_OFF:
                sc->sc_hw->lasi_power = LASI_OFF;
                break;
        }
}