/*      $NetBSD: pckbc_js.c,v 1.21 2021/12/04 13:34:35 andvar 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_js.c,v 1.21 2021/12/04 13:34:35 andvar 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>

struct pckbc_js_softc {
       struct pckbc_softc jsc_pckbc;   /* real "pckbc" softc */

       /* kbd and mouse share interrupt in both mr.coffee and krups */
       uint32_t jsc_intr;
       int jsc_established;
       void *jsc_int_cookie;
};


static int      pckbc_obio_match(device_t, cfdata_t, void *);
static void     pckbc_obio_attach(device_t, device_t, void *);

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

static void     pckbc_js_attach_common(struct pckbc_js_softc *,
                                      bus_space_tag_t, bus_addr_t, int, int);
static void     pckbc_js_intr_establish(struct pckbc_softc *, pckbport_slot_t);
static int      jsc_pckbdintr(void *);

/* Mr.Coffee */
CFATTACH_DECL_NEW(pckbc_obio, sizeof(struct pckbc_js_softc),
   pckbc_obio_match, pckbc_obio_attach, NULL, NULL);

/* ms-IIep */
CFATTACH_DECL_NEW(pckbc_ebus, sizeof(struct pckbc_js_softc),
   pckbc_ebus_match, pckbc_ebus_attach, NULL, NULL);

#define PCKBC_PROM_DEVICE_NAME "8042"

static int
pckbc_obio_match(device_t parent, cfdata_t cf, void *aux)
{
       union obio_attach_args *uoba = aux;
       struct sbus_attach_args *sa = &uoba->uoba_sbus;

       return (strcmp(sa->sa_name, PCKBC_PROM_DEVICE_NAME) == 0);
}

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

       return (strcmp(ea->ea_name, PCKBC_PROM_DEVICE_NAME) == 0);
}


static void
pckbc_obio_attach(device_t parent, device_t self, void *aux)
{
       struct pckbc_js_softc *jsc = device_private(self);
       union obio_attach_args *uoba = aux;
       struct sbus_attach_args *sa = &uoba->uoba_sbus;
       bus_space_tag_t iot;
       bus_addr_t ioaddr;
       int intr, isconsole;

       jsc->jsc_pckbc.sc_dv = self;
       iot = sa->sa_bustag;
       ioaddr = BUS_ADDR(sa->sa_slot, sa->sa_offset);
       intr = sa->sa_nintr ? sa->sa_pri : /* level */ 13;

       /*
        * TODO:
        * . on OFW machines stdin is keyboard node, not 8042 node
        * . on OBP machines 8042 node is faked by boot's prompatch
        *   and PROM's stdin points to zs keyboard (add prom patch?)
        * . we probably want the stdout node to control whether
        *   console goes to serial
        */
       isconsole = 1;

       pckbc_js_attach_common(jsc, iot, ioaddr, intr, isconsole);
}

static void
pckbc_ebus_attach(device_t parent, device_t self, void *aux)
{
       struct pckbc_js_softc *jsc = device_private(self);
       struct ebus_attach_args *ea = aux;
       bus_space_tag_t iot;
       bus_addr_t ioaddr;
       int intr;
       int stdin_node, node;
       int isconsole;

       jsc->jsc_pckbc.sc_dv = self;
       iot = ea->ea_bustag;
       ioaddr = EBUS_ADDR_FROM_REG(&ea->ea_reg[0]);
       intr = ea->ea_nintr ? ea->ea_intr[0] : /* line */ 0;

       /* search children of "8042" node for stdin (keyboard) */
       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;
               }

       pckbc_js_attach_common(jsc, iot, ioaddr, intr, isconsole);
}


static void
pckbc_js_attach_common(struct pckbc_js_softc *jsc,
                      bus_space_tag_t iot, bus_addr_t ioaddr, int intr,
                      int isconsole)
{
       struct pckbc_softc *sc = (struct pckbc_softc *)jsc;
       struct pckbc_internal *t;

       jsc->jsc_pckbc.intr_establish = pckbc_js_intr_establish;
       jsc->jsc_intr = intr;
       jsc->jsc_established = 0;

       if (isconsole) {
               int status;

               status = pckbc_cnattach(iot, ioaddr, KBCMDP, PCKBC_KBD_SLOT, 0);
               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 = sc;
       sc->id = t;

       /* finish off the attach */
       aprint_normal("\n");
       pckbc_attach(sc);
}


/*
* Keyboard and mouse share the interrupt
* so don't install interrupt handler twice.
*/
static void
pckbc_js_intr_establish(struct pckbc_softc *sc, pckbport_slot_t slot)
{
       struct pckbc_js_softc *jsc = (struct pckbc_js_softc *)sc;
       void *res;

       if (jsc->jsc_established) {
#ifdef DEBUG
               aprint_verbose_dev(sc->sc_dv,
                   "%s slot shares interrupt (already established)\n",
                   pckbc_slot_names[slot]);
#endif
               return;
       }

       /*
        * We can not choose the device class interrupt level freely,
        * so we debounce via a softinterrupt.
        */
       jsc->jsc_int_cookie = softint_establish(SOFTINT_SERIAL,
           pckbcintr_soft, &jsc->jsc_pckbc);
       if (jsc->jsc_int_cookie == NULL) {
               aprint_error_dev(sc->sc_dv,
                   "unable to establish %s soft interrupt\n",
                   pckbc_slot_names[slot]);
               return;
       }
       res = bus_intr_establish(sc->id->t_iot, jsc->jsc_intr,
                                IPL_SERIAL, jsc_pckbdintr, jsc);
       if (res == NULL)
               aprint_error_dev(sc->sc_dv,
                   "unable to establish %s slot interrupt\n",
                   pckbc_slot_names[slot]);
       else
               jsc->jsc_established = 1;
}

static int
jsc_pckbdintr(void *vsc)
{
       struct pckbc_js_softc *jsc = vsc;

       softint_schedule(jsc->jsc_int_cookie);
       pckbcintr_hard(&jsc->jsc_pckbc);

       /*
        * This interrupt is not shared on javastations, avoid "stray"
        * warnings. XXX - why do "stray interrupt" warnings happen if
        * we don't claim the interrupt always?
        */
       return 1;
}

/*
* MD hook for use without MI wscons.
* Called by pckbc_cnattach().
*/
int
pckbport_machdep_cnattach(pckbport_tag_t constag, pckbport_slot_t slot)
{

       return (0);
}

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