/*      $NetBSD: com_frodo.c,v 1.11 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.
*
* 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) 1991 The Regents of the University of California.
* 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.
* 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.
*
*      @(#)com.c       7.5 (Berkeley) 5/16/91
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: com_frodo.c,v 1.11 2024/01/16 05:48:28 thorpej Exp $");

#include "sti_sgc.h"

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

#include <machine/bus.h>

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

#include <hp300/dev/intiovar.h>
#include <hp300/dev/frodoreg.h>
#include <hp300/dev/frodovar.h>
#include <hp300/dev/com_frodovar.h>

#include "ioconf.h"

struct com_frodo_softc {
       struct  com_softc sc_com;       /* real "com" softc */
};

static int      com_frodo_match(device_t, cfdata_t , void *);
static void     com_frodo_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(com_frodo, sizeof(struct com_frodo_softc),
   com_frodo_match, com_frodo_attach, NULL, NULL);

static int com_frodo_speed = TTYDEF_SPEED;
static struct bus_space_tag comcntag;

#define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
#define COM_FRODO_FREQ  8006400

static int
com_frodo_match(device_t parent, cfdata_t match, void *aux)
{
       struct frodo_attach_args *fa = aux;

       if (strcmp(fa->fa_name, com_cd.cd_name) != 0)
               return 0;

       switch (fa->fa_offset) {
       case FRODO_APCI_OFFSET(1):
       case FRODO_APCI_OFFSET(2):
       case FRODO_APCI_OFFSET(3):
               return 1;
       }

       return 0;
}

static void
com_frodo_attach(device_t parent, device_t self, void *aux)
{
       struct com_frodo_softc *fsc = device_private(self);
       struct com_softc *sc = &fsc->sc_com;
       struct frodo_attach_args *fa = aux;
       bus_space_tag_t iot;
       bus_space_handle_t ioh;
       int isconsole;

       sc->sc_dev = self;
       isconsole = com_is_console(&comcntag, fa->fa_base + fa->fa_offset,
           &ioh);

       if (isconsole)
               iot = &comcntag;
       else
               iot = fa->fa_bst;

       if (!isconsole &&
           bus_space_map(iot, fa->fa_base + fa->fa_offset, COM_NPORTS << 2,
            0, &ioh)) {
               aprint_error(": can't map i/o space\n");
               return;
       }
       com_init_regs(&sc->sc_regs, iot, ioh, fa->fa_base + fa->fa_offset);

       sc->sc_frequency = COM_FRODO_FREQ;
       SET(sc->sc_hwflags, COM_HW_NOIEN);

       com_attach_subr(sc);

       frodo_intr_establish(parent, comintr, sc, fa->fa_line, ISRPRI_TTY);
}

int
com_frodo_cnattach(bus_space_tag_t bst, bus_addr_t addr, int scode)
{
       bus_space_tag_t iot = &comcntag;
       bus_space_handle_t ioh;
       volatile uint8_t *frodoregs;

       if (machineid != HP_425 || mmuid != MMUID_425_E)
               return 1;

       /*
        * Check the service switch. On the 425e, this is a physical
        * switch, unlike other frodo-based machines, so we can use it
        * as a serial vs internal video selector, since the PROM can not
        * be configured for serial console.
        */
       frodoregs = (volatile uint8_t *)IIOV(INTIOBASE + FRODO_BASE);
       if (badaddr(__UNVOLATILE(frodoregs)) != 0) {
               /* 425e but no frodo chip found? */
               return 1;
       }

       /*
        * if sti(4) is not configured, we need serial console anyway
        * and no need to check the service switch.
        */
#if NSTI_SGC > 0
       if (ISSET(frodoregs[FRODO_IISR], FRODO_IISR_SERVICE))
               return 1;
#endif

       frodo_init_bus_space(iot);

       if (bus_space_map(iot, addr, INTIO_DEVSIZE, BUS_SPACE_MAP_LINEAR, &ioh))
               return 1;

       comcnattach(iot, addr, com_frodo_speed, COM_FRODO_FREQ,
           COM_TYPE_NORMAL, CONMODE);

       return 0;
}