/*      $OpenBSD: com_dino.c,v 1.4 2007/07/15 19:25:49 kettenis Exp $   */

/*
 * Copyright (c) 2004 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/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/tty.h>

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

#include <dev/ic/comreg.h>
#include <dev/ic/comvar.h>

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

void *dino_intr_establish(void *sc, int irq, int pri,
    int (*handler)(void *v), void *arg);

#define COM_DINO_FREQ   7272700

struct com_dino_softc {
        struct  com_softc sc_com;       /* real "com" softc */
        void    *sc_ih;                 /* interrupt handler */
};

struct com_dino_regs {
        uint8_t         reset;
        uint8_t         pad0[3];
        uint8_t         test;
#define COM_DINO_PAR_LOOP       0x01
#define COM_DINO_CLK_SEL        0x02
        uint8_t         pad1[3];
        uint32_t        iodc;
        uint8_t         pad2[0x54];
        uint8_t         dither;
};

int     com_dino_match(device_t, cfdata_t, void *);
void    com_dino_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(com_dino, sizeof(struct com_dino_softc), com_dino_match,
    com_dino_attach, NULL, NULL);

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

        if (ca->ca_type.iodc_type != HPPA_TYPE_FIO ||
            ca->ca_type.iodc_sv_model != HPPA_FIO_GRS232)
                return 0;

        return 1;
        /* HOZER comprobe1(ca->ca_iot, ca->ca_hpa + IOMOD_DEVOFFSET); */
}

void
com_dino_attach(device_t parent, device_t self, void *aux)
{
        void *sc_dino = device_private(parent);
        struct com_dino_softc *sc_comdino = device_private(self);
        struct com_softc *sc = &sc_comdino->sc_com;
        struct confargs *ca = aux;
        struct com_dino_regs *regs = (struct com_dino_regs *)ca->ca_hpa;
        int pagezero_cookie;

        bus_addr_t iobase;
        bus_space_handle_t ioh;

        sc->sc_dev = self;
        iobase = (bus_addr_t)ca->ca_hpa + IOMOD_DEVOFFSET;
        sc->sc_frequency = COM_DINO_FREQ;

        /* Test if this is the console.  Compare either HPA or device path. */
        pagezero_cookie = hppa_pagezero_map();
        if (PAGE0->mem_cons.pz_class == PCL_DUPLEX &&
            PAGE0->mem_cons.pz_hpa == (struct iomod *)ca->ca_hpa) {

                /*
                 * This port is the console.  In this case we must call
                 * comcnattach() and later com_is_console() to initialize
                 * everything properly.
                 */

                if (comcnattach(ca->ca_iot, iobase, B9600,
                    sc->sc_frequency, COM_TYPE_NORMAL,
                    (TTYDEF_CFLAG & ~(CSIZE | PARENB)) | CS8) != 0) {
                        aprint_error(": can't comcnattach\n");
                        hppa_pagezero_unmap(pagezero_cookie);
                        return;
                }
        }
        hppa_pagezero_unmap(pagezero_cookie);

        /*
         * Get the already initialized console ioh via com_is_console() if
         * this is the console or map the I/O space if this isn't the console.
         */

        if (!com_is_console(ca->ca_iot, iobase, &ioh) &&
            bus_space_map(ca->ca_iot, iobase, COM_NPORTS, 0, &ioh) != 0) {
                aprint_error(": can't map I/O space\n");
                return;
        }
        com_init_regs(&sc->sc_regs, ca->ca_iot, ioh, iobase);

        /* select clock freq */
        regs->test = COM_DINO_CLK_SEL;

        com_attach_subr(sc);

        ca->ca_irq = 10;

        sc_comdino->sc_ih = dino_intr_establish(sc_dino, ca->ca_irq, IPL_TTY,
            comintr, sc);
}