/*      $NetBSD: asp.c,v 1.4 2021/08/07 16:18:55 thorpej Exp $  */

/*      $OpenBSD: asp.c,v 1.5 2000/02/09 05:04:22 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.
 */

/*
 * References:
 *
 * 1. Cobra/Coral I/O Subsystem External Reference Specification
 *    Hewlett-Packard
 *
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: asp.c,v 1.4 2021/08/07 16:18:55 thorpej Exp $");

#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 <machine/cpufunc.h>

#include <hppa/hppa/machdep.h>
#include <hppa/dev/cpudevs.h>
#include <hppa/dev/viper.h>

#include <hppa/gsc/gscbusvar.h>

struct asp_hwr {
        uint8_t asp_reset;
        uint8_t asp_resv[31];
        uint8_t asp_version;
        uint8_t asp_resv1[15];
        uint8_t asp_scsidsync;
        uint8_t asp_resv2[15];
        uint8_t asp_error;
};

struct asp_trs {
        uint32_t asp_irr;
        uint32_t asp_imr;
        uint32_t asp_ipr;
        uint32_t asp_icr;
        uint32_t asp_iar;
        uint32_t asp_resv[3];
        uint8_t  asp_cled;
        uint8_t  asp_resv1[3];
        struct {
                u_int           :20,
                        asp_spu : 3,    /* SPU ID board jumper */
#define ASP_SPUCOBRA    0
#define ASP_SPUCORAL    1
#define ASP_SPUBUSH     2
#define ASP_SPUHARDBALL 3
#define ASP_SPUSCORPIO  4
#define ASP_SPUCORAL2   5
                        asp_sw  : 1,    /* front switch is normal */
                        asp_clk : 1,    /* SCSI clock is doubled */
                        asp_lan : 2,    /* LAN iface selector */
#define ASP_LANINVAL    0
#define ASP_LANAUI      1
#define ASP_LANTHIN     2
#define ASP_LANMISS     3
                        asp_lanf: 1,    /* LAN AUI fuse is ok */
                        asp_spwr: 1,    /* SCSI power ok */
                        asp_scsi: 3;    /* SCSI ctrl ID */
        } _asp_ios;
#define asp_spu         _asp_ios.asp_spu
#define asp_sw          _asp_ios.asp_sw
#define asp_clk         _asp_ios.asp_clk
#define asp_lan         _asp_ios.asp_lan
#define asp_lanf        _asp_ios.asp_lanf
#define asp_spwr        _asp_ios.asp_spwr
#define asp_scsi        _asp_ios.asp_scsi
};

#define ASP_BANK_SZ     0x02000000
#define ASP_REG_INT     0x00800000
#define ASP_ETHER_ADDR  0x00810000
#define ASP_REG_MISC    0x0082f000

const struct asp_spus_tag {
        char    name[12];
        int     ledword;
} asp_spus[] = {
        { "Cobra", 0 },
        { "Coral", 0 },
        { "Bushmaster", 0 },
        { "Hardball", 1 },
        { "Scorpio", 0 },
        { "Coral II", 1 },
        { "#6", 0 },
        { "#7", 0 }
};

struct asp_softc {
        device_t sc_dev;

        struct hppa_interrupt_register sc_ir;

        volatile struct asp_hwr *sc_hw;
        volatile struct asp_trs *sc_trs;
};

int     aspmatch(device_t, cfdata_t, void *);
void    aspattach(device_t, device_t, void *);

CFATTACH_DECL_NEW(asp, sizeof(struct asp_softc),
    aspmatch, aspattach, NULL, NULL);

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

        /*
         * Determine this module's interrupt bit.
         */
        module_offset = ga->ga_hpa - (hppa_hpa_t) sc->sc_trs;
        ga->ga_irq = HPPACF_IRQ_UNDEF;
#define ASP_IRQ(off, irq) if (module_offset == off) ga->ga_irq = irq
        ASP_IRQ(0x22000, 6);    /* com1 */
        ASP_IRQ(0x23000, 5);    /* com0 */
        ASP_IRQ(0x24000, 7);    /* lpt */
        ASP_IRQ(0x25000, 9);    /* osiop */
        ASP_IRQ(0x26000, 8);    /* ie */
        ASP_IRQ(0x30000, 3);    /* siop */
        ASP_IRQ(0x800000, 13);  /* harmony */
#undef ASP_IRQ
}

int
aspmatch(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_ASP)
                return 0;

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

        return 1;
}

void
aspattach(device_t parent, device_t self, void *aux)
{
        struct confargs *ca = aux;
        struct asp_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;

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

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

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

        /*
         * Map the Ethernet address and read it out.
         */
        if (bus_space_map(ca->ca_iot, ca->ca_hpa + ASP_ETHER_ADDR,
                          sizeof(ga.ga_ether_address), 0, &ioh)) {
                aprint_error(": can't map EEPROM.\n");
                return;
        }
        bus_space_read_region_1(ca->ca_iot, ioh, 0,
                ga.ga_ether_address, sizeof(ga.ga_ether_address));
        bus_space_unmap(ca->ca_iot, ioh, sizeof(ga.ga_ether_address));

#ifdef USELEDS
        machine_ledaddr = &sc->sc_trs->asp_cled;
        machine_ledword = asp_spus[sc->sc_trs->asp_spu].ledword;
#endif

        /* reset ASP */
        /* sc->sc_hw->asp_reset = 1; */
        /* delay(400000); */

        s = splhigh();
        viper_setintrwnd(1 << ca->ca_irq);

        sc->sc_trs->asp_imr = 0;
        (void)sc->sc_trs->asp_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->asp_imr;
        sc->sc_ir.ir_req = &sc->sc_trs->asp_irr;

        splx(s);

        aprint_normal(": %s rev %d, lan %d scsi %d\n",
            asp_spus[sc->sc_trs->asp_spu].name, sc->sc_hw->asp_version,
            sc->sc_trs->asp_lan, sc->sc_trs->asp_scsi);

        /* 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 = asp_fix_args;
        ga.ga_fix_args_cookie = sc;
        ga.ga_scsi_target = sc->sc_trs->asp_scsi;
        config_found(self, &ga, gscprint, CFARGS_NONE);
}