/*      $NetBSD: pckbc_ebus.c,v 1.4 2021/01/04 14:48:51 thorpej Exp $ */

/*
 * Copyright (c) 2002 Valeriy E. Ushakov
 * 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. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * 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 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.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: pckbc_ebus.c,v 1.4 2021/01/04 14:48:51 thorpej Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/kmem.h>
#include <sys/bus.h>
#include <sys/intr.h>

#include <machine/autoconf.h>

#include <dev/ic/i8042reg.h>
#include <dev/ic/pckbcvar.h>
#include <dev/pckbport/pckbportvar.h>

#include <dev/ebus/ebusreg.h>
#include <dev/ebus/ebusvar.h>

#include "opt_tadpmu.h"
#include <sparc64/dev/tadpmureg.h>
#include <sparc64/dev/tadpmuvar.h>

struct pckbc_ebus_softc {
        struct pckbc_softc psc_pckbc;   /* real "pckbc" softc */
        uint32_t psc_intr[5];   /* Tadpole Viper's pckbc has 3 slots */
};

static int      pckbc_ebus_match(device_t, cfdata_t, void *);
static void     pckbc_ebus_attach(device_t, device_t, void *);

static void     pckbc_ebus_intr_establish(struct pckbc_softc *, pckbport_slot_t);

#define PCKBC_PROM_DEVICE_NAME "8042"
#define PCKBC_PROM_DEVICE_NAME2 "kb_ps2"

CFATTACH_DECL_NEW(pckbc_ebus, sizeof(struct pckbc_ebus_softc),
    pckbc_ebus_match, pckbc_ebus_attach, NULL, NULL);


static int
pckbc_ebus_match(device_t parent, cfdata_t cf, void *aux)
{
        struct ebus_attach_args *ea = aux;

        if (strcmp(ea->ea_name, PCKBC_PROM_DEVICE_NAME) == 0 ||
            strcmp(ea->ea_name, PCKBC_PROM_DEVICE_NAME2) == 0)
                return 1;
        return 0;
}

static void
pckbc_ebus_attach(device_t parent, device_t self, void *aux)
{
        struct pckbc_ebus_softc *sc = device_private(self);
        struct pckbc_softc *psc = (struct pckbc_softc *) sc;
        struct ebus_attach_args *ea = aux;
        struct pckbc_internal *t;
        bus_space_tag_t iot;
        bus_addr_t ioaddr;
        int stdin_node, node;
        int isconsole, i;

        psc->sc_dv = self;
        iot = ea->ea_bustag;
        ioaddr = EBUS_ADDR_FROM_REG(&ea->ea_reg[0]);

        stdin_node = prom_instance_to_package(prom_stdin());
        isconsole = 0;
        for (node = prom_firstchild(ea->ea_node);
             node != 0; node = prom_nextsibling(node))
                if (node == stdin_node) {
                        isconsole = 1;
                        break;
                }

        psc->intr_establish = pckbc_ebus_intr_establish;

        if (ea->ea_nintr < PCKBC_NSLOTS) {
                aprint_error(": no intr %d", ea->ea_nintr);

                /*
                 * XXX OpenBIOS doesn't provide interrupts for pckbc
                 * currently, so use the interrupt numbers described in
                 * QEMU's hw/sparc64/sun4u.c::isa_irq_handler.
                 */
                if (strcmp(machine_model, "OpenBiosTeam,OpenBIOS") == 0) {
                        sc->psc_intr[PCKBC_KBD_SLOT] = 0x29;
                        sc->psc_intr[PCKBC_AUX_SLOT] = 0x2a;
                } else {
                        aprint_error("\n");
                        return;
                }
        } else {
                for (i = 0; i < ea->ea_nintr; i++)
                        sc->psc_intr[i] = ea->ea_intr[i];
        }

        if (isconsole) {
                int status;

                status = pckbc_cnattach(iot, ioaddr, KBCMDP, 0,
                    PCKBC_NEED_AUXWRITE | PCKBC_CANT_TRANSLATE);
                if (status == 0)
                        aprint_normal(": cnattach ok");
                else
                        aprint_error(": cnattach %d", status);
        }

        if (pckbc_is_console(iot, ioaddr)) {
                t = &pckbc_consdata;
                pckbc_console_attached = 1;
        } else {
                bus_space_handle_t ioh_d, ioh_c;

                if (bus_space_map(iot, ioaddr + KBDATAP, 1, 0, &ioh_d) != 0) {
                        aprint_error(": unable to map data register\n");
                        return;
                }

                if (bus_space_map(iot, ioaddr + KBCMDP,  1, 0, &ioh_c) != 0) {
                        bus_space_unmap(iot, ioh_d, 1);
                        aprint_error(": unable to map cmd register\n");
                        return;
                }

                t = kmem_zalloc(sizeof(struct pckbc_internal), KM_SLEEP);
                t->t_iot = iot;
                t->t_ioh_d = ioh_d;
                t->t_ioh_c = ioh_c;
                t->t_addr = ioaddr;
                t->t_cmdbyte = KC8_CPU; /* initial command: enable ports */
                callout_init(&t->t_cleanup, 0);

                (void) pckbc_poll_data1(t, PCKBC_KBD_SLOT); /* flush */

                if (pckbc_send_cmd(iot, ioh_c, KBC_SELFTEST) == 0)
                        aprint_error(": unable to request self test");
                else {
                        int response;

                        response = pckbc_poll_data1(t, PCKBC_KBD_SLOT);
                        if (response == 0x55)
                                aprint_normal(": selftest ok");
                        else
                                aprint_error(": selftest failed (0x%02x)",
                                    response);
                }
        }

        /* crosslink */
        t->t_sc = psc;
        psc->id = t;

        /* finish off the attach */
        aprint_normal("\n");
        pckbc_attach(psc);
#ifdef HAVE_TADPMU
        /* now look for a tadpmu child device */
        char name[64], *p;
        int pmu = 0;
        for (node = prom_firstchild(ea->ea_node);
             node != 0; node = prom_nextsibling(node)) {
                if((p = prom_getpropstringA(node, "name", name, 64)) != NULL) {
                        if (strcmp(name, "tadpmu") == 0) {
                                pmu = node;
                                break;
                        }
                }
        }
        if (pmu != 0) {
                void *irq;

                bus_space_handle_t hcmd, hdata;
                if (bus_space_map(iot, ioaddr + TADPMU_CMD,  1, 0, &hcmd) != 0) {
                        bus_space_unmap(iot, hcmd, 1);
                        aprint_error(": unable to map PMU cmd register\n");
                        return;
                }
                if (bus_space_map(iot, ioaddr + TADPMU_DATA,  1, 0, &hdata) != 0) {
                        bus_space_unmap(iot, hdata, 1);
                        aprint_error(": unable to map PMU data register\n");
                        return;
                }
                tadpmu_init(iot, hcmd, hdata);
                irq = bus_intr_establish(iot, sc->psc_intr[2], IPL_TTY,
                                         tadpmu_intr, sc);
                if (irq == NULL) {
                        aprint_error("failed to establish tadpmu interrupt\n");
                }
        }
#endif
}

static void
pckbc_ebus_intr_establish(struct pckbc_softc *sc, pckbport_slot_t slot)
{
        struct pckbc_ebus_softc *psc = (struct pckbc_ebus_softc *)sc;
        void *res;

        /* We assume that interrupt order is the same as slot order. */
        res = bus_intr_establish(sc->id->t_iot, psc->psc_intr[slot],
                                 IPL_TTY, pckbcintr, sc);
        if (res == NULL)
                aprint_error_dev(sc->sc_dv,
                    "unable to establish %s slot interrupt\n",
                    pckbc_slot_names[slot]);

        return;
}