/*      $NetBSD: com_obio.c,v 1.25 2018/12/08 17:46:13 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_obio.c,v 1.25 2018/12/08 17:46:13 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/ioctl.h>
#include <sys/select.h>
#include <sys/tty.h>
#include <sys/proc.h>
#include <sys/conf.h>
#include <sys/file.h>
#include <sys/uio.h>
#include <sys/kernel.h>
#include <sys/syslog.h>
#include <sys/types.h>
#include <sys/device.h>
#include <sys/termios.h>

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

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

#include <sparc/sparc/auxreg.h>

struct com_obio_softc {
       struct com_softc osc_com;       /* real "com" softc */

       int osc_tadpole;                /* is this on a tadpole */
       /* OBIO-specific goo. */
       struct evcnt osc_intrcnt;       /* interrupt counting */
};

static int com_obio_match(device_t, cfdata_t , void *);
static void com_obio_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(com_obio, sizeof(struct com_obio_softc),
   com_obio_match, com_obio_attach, NULL, NULL);

static int
com_obio_match(device_t parent, cfdata_t cf, void *aux)
{
       union obio_attach_args *uoba = aux;
       struct sbus_attach_args *sa = &uoba->uoba_sbus;
       int tadpole = 0;
       int need_probe = 0;
       int rv = 0;
       uint8_t auxregval = 0;

       if (uoba->uoba_isobio4 != 0) {
               return (0);
       }

       /*
        * Tadpole 3GX/3GS uses "modem" for a 16450 port
        * (We need to enable it before probing)
        */
       if (strcmp("modem", sa->sa_name) == 0) {
               auxregval = *AUXIO4M_REG;
               *AUXIO4M_REG = auxregval | (AUXIO4M_LED|AUXIO4M_LTE);
               DELAY(100);
               tadpole = 1;
               need_probe = 1;
       }

       /*
        * Sun JavaStation 1 uses "su" for a 16550 port
        */
       if (strcmp("su", sa->sa_name) == 0) {
               need_probe = 1;
       }

       if (need_probe) {
               bus_space_handle_t ioh;

               if (sbus_bus_map(sa->sa_bustag,
                                sa->sa_slot, sa->sa_offset, sa->sa_size,
                                BUS_SPACE_MAP_LINEAR, &ioh) == 0) {
                       rv = comprobe1(sa->sa_bustag, ioh);
#if 0
                       printf("modem: probe: lcr=0x%02x iir=0x%02x\n",
                               bus_space_read_1(sa->sa_bustag, ioh, 3),
                               bus_space_read_1(sa->sa_bustag, ioh, 2));
#endif
                       bus_space_unmap(sa->sa_bustag, ioh, sa->sa_size);
               }
       }

       /* Disable the com port if tadpole */
       if (tadpole)
               *AUXIO4M_REG = auxregval;

       return (rv);
}

static void
com_obio_attach(device_t parent, device_t self, void *aux)
{
       struct com_obio_softc *osc = device_private(self);
       struct com_softc *sc = &osc->osc_com;
       union obio_attach_args *uoba = aux;
       struct sbus_attach_args *sa = &uoba->uoba_sbus;
       bus_space_handle_t ioh;
       bus_space_tag_t iot;
       bus_addr_t iobase;

       sc->sc_dev = self;

       if (strcmp("modem", sa->sa_name) == 0) {
               osc->osc_tadpole = 1;
       }

       /*
        * We're living on an obio that looks like an sbus slot.
        */
       iot = sa->sa_bustag;
       iobase = sa->sa_offset;
       sc->sc_frequency = COM_FREQ;

       /*
        * XXX: It would be nice to be able to split console input and
        * output to different devices.  For now switch to serial
        * console if PROM stdin is on serial (so that we can use DDB).
        */
       if (prom_instance_to_package(prom_stdin()) == sa->sa_node)
               comcnattach(iot, iobase, B9600, sc->sc_frequency,
                   COM_TYPE_NORMAL, (CLOCAL | CREAD | CS8));

       if (!com_is_console(iot, iobase, &ioh) &&
           sbus_bus_map(iot, sa->sa_slot, iobase, sa->sa_size,
                        BUS_SPACE_MAP_LINEAR, &ioh) != 0) {
               aprint_error(": can't map registers\n");
               return;
       }

       com_init_regs(&sc->sc_regs, iot, ioh, iobase);

       if (osc->osc_tadpole) {
               *AUXIO4M_REG |= (AUXIO4M_LED|AUXIO4M_LTE);
               do {
                       DELAY(100);
               } while (!com_probe_subr(&sc->sc_regs));
#if 0
               printf("modem: attach: lcr=0x%02x iir=0x%02x\n",
                       bus_space_read_1(sc->sc_regs.iot, sc->sc_regs.ioh, 3),
                       bus_space_read_1(sc->sc_regs.iot, sc->sc_regs.ioh, 2));
#endif
       }

       com_attach_subr(sc);

       if (sa->sa_nintr != 0) {
               (void)bus_intr_establish(sc->sc_regs.cr_iot, sa->sa_pri,
                   IPL_SERIAL, comintr, sc);
               evcnt_attach_dynamic(&osc->osc_intrcnt, EVCNT_TYPE_INTR, NULL,
                   device_xname(self), "intr");
       }

       if (!pmf_device_register1(self, com_suspend, com_resume, com_cleanup)) {
               aprint_error_dev(self, "could not establish shutdown hook");
       }
}

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