/* $NetBSD: nextkbd.c,v 1.19 2023/02/03 23:13:00 tsutsui Exp $ */
/*
* Copyright (c) 1998 Matt DeBergalis
* 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. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by Matt DeBergalis
* 4. 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: nextkbd.c,v 1.19 2023/02/03 23:13:00 tsutsui Exp $");

#include <sys/cdefs.h>                  /* RCS ID & Copyright macro defns */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/device.h>
#include <sys/kmem.h>
#include <sys/errno.h>
#include <sys/queue.h>
#include <sys/bus.h>
#include <sys/cpu.h>
#include <sys/intr.h>

#include <machine/autoconf.h>

#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wskbdvar.h>
#include <dev/wscons/wsksymdef.h>
#include <dev/wscons/wsksymvar.h>

#include <next68k/dev/nextkbdvar.h>
#include <next68k/dev/wskbdmap_next.h>

#include <next68k/next68k/isr.h>

#include <next68k/dev/intiovar.h>

struct nextkbd_internal {
       int num_ints; /* interrupt total */
       int polling;
       int isconsole;

       bus_space_tag_t iot;
       bus_space_handle_t ioh;
       struct nextkbd_softc *t_sc; /* back pointer */
       uint32_t mods;
};

struct mon_regs {
       uint32_t mon_csr;
       uint32_t mon_1;
       uint32_t mon_data;
};

static int attached = 0;

int nextkbd_match(device_t, cfdata_t, void *);
void nextkbd_attach(device_t, device_t, void *);

int nextkbc_cnattach(bus_space_tag_t);

CFATTACH_DECL_NEW(nextkbd, sizeof(struct nextkbd_softc),
   nextkbd_match, nextkbd_attach, NULL, NULL);

int     nextkbd_enable(void *, int);
void    nextkbd_set_leds(void *, int);
int     nextkbd_ioctl(void *, u_long, void *, int, struct lwp *);

const struct wskbd_accessops nextkbd_accessops = {
       nextkbd_enable,
       nextkbd_set_leds,
       nextkbd_ioctl,
};

void    nextkbd_cngetc(void *, u_int *, int *);
void    nextkbd_cnpollc(void *, int);

const struct wskbd_consops nextkbd_consops = {
       nextkbd_cngetc,
       nextkbd_cnpollc,
};

const struct wskbd_mapdata nextkbd_keymapdata = {
       nextkbd_keydesctab,
       KB_US,
};

static int nextkbd_read_data(struct nextkbd_internal *);
static int nextkbd_decode(struct nextkbd_internal *, int, u_int *, int *);

static struct nextkbd_internal nextkbd_consdata;
static int nextkbd_is_console(bus_space_tag_t);

int nextkbdhard(void *);

static int
nextkbd_is_console(bus_space_tag_t bst)
{

       return (nextkbd_consdata.isconsole && (bst == nextkbd_consdata.iot));
}

int
nextkbd_match(device_t parent, cfdata_t match, void *aux)
{
       struct intio_attach_args *ia = (struct intio_attach_args *)aux;

       if (attached)
               return 0;

       ia->ia_addr = (void *)NEXT_P_MON;

       return 1;
}

void
nextkbd_attach(device_t parent, device_t self, void *aux)
{
       struct nextkbd_softc *sc = device_private(self);
       struct intio_attach_args *ia = aux;
       int isconsole;
       struct wskbddev_attach_args a;

       printf("\n");

       isconsole = nextkbd_is_console(ia->ia_bst); /* XXX */

       if (isconsole) {
               sc->id = &nextkbd_consdata;
       } else {
               sc->id = kmem_zalloc(sizeof(struct nextkbd_internal), KM_SLEEP);

               sc->id->iot = ia->ia_bst;
               if (bus_space_map(sc->id->iot, NEXT_P_MON,
                   sizeof(struct mon_regs), 0, &sc->id->ioh)) {
                       printf("%s: can't map mon status control register\n",
                           device_xname(self));
                       return;
               }
       }

       sc->id->t_sc = sc; /* set back pointer */

       isrlink_autovec(nextkbdhard, sc, NEXT_I_IPL(NEXT_I_KYBD_MOUSE),
           0, NULL);

       INTR_ENABLE(NEXT_I_KYBD_MOUSE);

       a.console = isconsole;
       a.keymap = &nextkbd_keymapdata;
       a.accessops = &nextkbd_accessops;
       a.accesscookie = sc;

       /*
        * Attach the wskbd, saving a handle to it.
        * XXX XXX XXX
        */
       sc->sc_wskbddev = config_found(self, &a, wskbddevprint, CFARGS_NONE);

       attached = 1;
}

int
nextkbd_enable(void *v, int on)
{

       /* XXX not sure if this should do anything */
       /* printf("nextkbd_enable %d\n", on); */
       return 0;
}

void
nextkbd_set_leds(void *v, int leds)
{
       struct nextkbd_softc *sc = v;
       uint32_t hw_leds = 0;
       int s;

       sc->sc_leds &= ~ NEXT_WSKBD_LEDS;
       sc->sc_leds |= (leds & NEXT_WSKBD_LEDS);

       if (sc->sc_leds & WSKBD_LED_CAPS) {
               hw_leds |= 0x30000;
       }

       s = spltty();
       bus_space_write_1(sc->id->iot, sc->id->ioh, 3, 0xc5);
       /*
        * @@@ need to add:
        * if bit 7 of @ioh+0 set:
        *   repeat 2
        *     wait until bit 6 of @ioh+2 clears
        */
       bus_space_write_4(sc->id->iot, sc->id->ioh, 4, hw_leds);
       /*
        * @@@ need to add:
        *   wait until bit 4 of @ioh+0 (@ioh+2 if bit 7 was set above)
        *    clears
        */
       splx(s);
}

int
nextkbd_ioctl(void *v, u_long cmd, void *data, int flag, struct lwp *l)
{
       struct nextkbd_softc *sc = v;

       switch (cmd) {
       case WSKBDIO_GTYPE:
               /* XXX */
               *(int *)data = WSKBD_TYPE_NEXT;
               return 0;
       case WSKBDIO_SETLEDS:
               nextkbd_set_leds (sc, *(int *)data);
               return 0;
       case WSKBDIO_GETLEDS:
               *(int *)data = sc->sc_leds & NEXT_WSKBD_LEDS;
               return 0;
       case WSKBDIO_COMPLEXBELL:
               return 0;
       }
       return EPASSTHROUGH;
}

int
nextkbdhard(void *arg)
{
       struct nextkbd_softc *sc = arg;
       int type, key, val;

       if (!INTR_OCCURRED(NEXT_I_KYBD_MOUSE))
               return 0;

#define CSR_INT         0x00800000
#define CSR_DATA        0x00400000

#define KD_KEYMASK      0x007f
#define KD_DIRECTION    0x0080 /* pressed or released */
#define KD_CNTL         0x0100
#define KD_LSHIFT       0x0200
#define KD_RSHIFT       0x0400
#define KD_LCOMM        0x0800
#define KD_RCOMM        0x1000
#define KD_LALT         0x2000
#define KD_RALT         0x4000
#define KD_VALID        0x8000 /* only set for scancode keys ? */
#define KD_MODS         0x4f00

       val = nextkbd_read_data(sc->id);
       if ((val != -1) && nextkbd_decode(sc->id, val, &type, &key)) {
               wskbd_input(sc->sc_wskbddev, type, key);
       }
       return 1;
}

int
nextkbd_cnattach(bus_space_tag_t bst)
{
       bus_space_handle_t bsh;

       if (bus_space_map(bst, NEXT_P_MON, sizeof(struct mon_regs), 0, &bsh))
               return ENXIO;

       memset(&nextkbd_consdata, 0, sizeof(nextkbd_consdata));

       nextkbd_consdata.iot = bst;
       nextkbd_consdata.ioh = bsh;
       nextkbd_consdata.isconsole = 1;

       wskbd_cnattach(&nextkbd_consops, &nextkbd_consdata,
           &nextkbd_keymapdata);

       return 0;
}

void
nextkbd_cngetc(void *v, u_int *type, int *data)
{
       struct nextkbd_internal *t = v;
       int val;

       for (;;) {
               if (INTR_OCCURRED(NEXT_I_KYBD_MOUSE)) {
                       val = nextkbd_read_data(t);
                       if (val != -1 && nextkbd_decode(t, val, type, data))
                               return;
               }
       }
}

void
nextkbd_cnpollc(void *v, int on)
{
       struct nextkbd_internal *t = v;

       t->polling = on;
       if (on) {
               INTR_DISABLE(NEXT_I_KYBD_MOUSE);
       } else {
               INTR_ENABLE(NEXT_I_KYBD_MOUSE);
       }

}

static int
nextkbd_read_data(struct nextkbd_internal *id)
{
       unsigned char device;
       struct mon_regs stat = { 0 };

       bus_space_read_region_4(id->iot, id->ioh, 0, &stat, 3);
       if ((stat.mon_csr & CSR_INT) != 0 &&
           (stat.mon_csr & CSR_DATA) != 0) {
               stat.mon_csr &= ~CSR_INT;
               id->num_ints++;
               bus_space_write_4(id->iot, id->ioh, 0, stat.mon_csr);
               device = stat.mon_data >> 28;
               if (device != 1)
                       return -1; /* XXX: mouse */
               return stat.mon_data & 0xffff;
       }
       return -1;
}

static int
nextkbd_decode(struct nextkbd_internal *id, int datain, u_int *type,
   int *dataout)
{

#if 0
       printf("datain %08x mods %08x\n", datain, id->mods);
#endif

       if (((datain ^ id->mods) & KD_LSHIFT) != 0) {
               id->mods ^= KD_LSHIFT;
               *dataout = 90;
               if (datain & KD_LSHIFT)
                       *type = WSCONS_EVENT_KEY_DOWN;
               else
                       *type = WSCONS_EVENT_KEY_UP;
       } else if (((datain ^ id->mods) & KD_RSHIFT) != 0) {
               id->mods ^= KD_RSHIFT;
               *dataout = 91;
               if ((datain & KD_RSHIFT) != 0)
                       *type = WSCONS_EVENT_KEY_DOWN;
               else
                       *type = WSCONS_EVENT_KEY_UP;
       } else if (((datain ^ id->mods) & KD_LALT) != 0) {
               id->mods ^= KD_LALT;
               *dataout = 92;
               if ((datain & KD_LALT) != 0)
                       *type = WSCONS_EVENT_KEY_DOWN;
               else
                       *type = WSCONS_EVENT_KEY_UP;
       } else if (((datain ^ id->mods) & KD_RALT) != 0) {
               id->mods ^= KD_RALT;
               *dataout = 93;
               if ((datain & KD_RALT) != 0)
                       *type = WSCONS_EVENT_KEY_DOWN;
               else
                       *type = WSCONS_EVENT_KEY_UP;
       } else if (((datain ^ id->mods) & KD_CNTL) != 0) {
               id->mods ^= KD_CNTL;
               *dataout = 94;
               if ((datain & KD_CNTL) != 0)
                       *type = WSCONS_EVENT_KEY_DOWN;
               else
                       *type = WSCONS_EVENT_KEY_UP;
       } else if (((datain ^ id->mods) & KD_LCOMM) != 0) {
               id->mods ^= KD_LCOMM;
               *dataout = 95;
               if ((datain & KD_LCOMM) != 0)
                       *type = WSCONS_EVENT_KEY_DOWN;
               else
                       *type = WSCONS_EVENT_KEY_UP;
       } else if (((datain ^ id->mods) & KD_RCOMM) != 0) {
               id->mods ^= KD_RCOMM;
               *dataout = 96;
               if ((datain & KD_RCOMM) != 0)
                       *type = WSCONS_EVENT_KEY_DOWN;
               else
                       *type = WSCONS_EVENT_KEY_UP;
       } else if ((datain & KD_KEYMASK) != 0) {
               if ((datain & KD_DIRECTION) != 0)
                       *type = WSCONS_EVENT_KEY_UP;
               else
                       *type = WSCONS_EVENT_KEY_DOWN;

               *dataout = (datain & KD_KEYMASK);
       } else {
               *dataout = 0;
       }

       return 1;
}

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