/*      $NetBSD: mkbd.c,v 1.32 2021/09/18 15:14:40 tsutsui Exp $        */

/*-
* Copyright (c) 2001 Marcus Comstedt
* 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 Marcus Comstedt.
* 4. Neither the name of The NetBSD Foundation 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 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.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: mkbd.c,v 1.32 2021/09/18 15:14:40 tsutsui Exp $");

#include <sys/param.h>
#include <sys/device.h>
#include <sys/fcntl.h>
#include <sys/poll.h>
#include <sys/select.h>
#include <sys/proc.h>
#include <sys/signalvar.h>
#include <sys/systm.h>
#include <sys/bus.h>

#include "wskbd.h"

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

#include <machine/cpu.h>

#include <dreamcast/dev/maple/maple.h>
#include <dreamcast/dev/maple/mapleconf.h>
#include <dreamcast/dev/maple/mkbdvar.h>
#include <dreamcast/dev/maple/mkbdmap.h>

/*
* Function declarations.
*/
static  int mkbdmatch(device_t, cfdata_t, void *);
static  void mkbdattach(device_t, device_t, void *);
static  int mkbddetach(device_t, int);

int     mkbd_enable(void *, int);
void    mkbd_set_leds(void *, int);
int     mkbd_ioctl(void *, u_long, void *, int, struct lwp *);

struct wskbd_accessops mkbd_accessops = {
       mkbd_enable,
       mkbd_set_leds,
       mkbd_ioctl,
};

static void mkbd_intr(void *, struct maple_response *, int, int);

void    mkbd_cngetc(void *, u_int *, int *);
void    mkbd_cnpollc(void *, int);
int     mkbd_cnattach(void);

struct wskbd_consops mkbd_consops = {
       mkbd_cngetc,
       mkbd_cnpollc,
};

struct wskbd_mapdata mkbd_keymapdata = {
       mkbd_keydesctab,
       KB_JP,
};

static struct mkbd_softc *mkbd_console_softc;

static int mkbd_is_console;
static int mkbd_console_initted;

CFATTACH_DECL_NEW(mkbd, sizeof(struct mkbd_softc),
   mkbdmatch, mkbdattach, mkbddetach, NULL);

static int
mkbdmatch(device_t parent, cfdata_t cf, void *aux)
{
       struct maple_attach_args *ma = aux;

       return ma->ma_function == MAPLE_FN_KEYBOARD ? MAPLE_MATCH_FUNC : 0;
}

static void
mkbdattach(device_t parent, device_t self, void *aux)
{
       struct mkbd_softc *sc = device_private(self);
       struct maple_attach_args *ma = aux;
#if NWSKBD > 0
       struct wskbddev_attach_args a;
#endif
       uint32_t kbdtype;

       sc->sc_dev = self;
       sc->sc_parent = parent;
       sc->sc_unit = ma->ma_unit;

       kbdtype = maple_get_function_data(ma->ma_devinfo,
           MAPLE_FN_KEYBOARD) >> 24;
       switch (kbdtype) {
       case 1:
               printf(": Japanese keyboard");
               mkbd_keymapdata.layout = KB_JP;
               break;
       case 2:
               printf(": US keyboard");
               mkbd_keymapdata.layout = KB_US;
               break;
       case 3:
               printf(": European keyboard");
               mkbd_keymapdata.layout = KB_UK;
               break;
       default:
               printf(": Unknown keyboard %d", kbdtype);
       }
       printf("\n");
#ifdef MKBD_LAYOUT
       /* allow user to override the default keymap */
       mkbd_keymapdata.layout = MKBD_LAYOUT;
#endif
#ifdef MKBD_SWAPCTRLCAPS
       /* allow user to specify swapctrlcaps with the default keymap */
       mkbd_keymapdata.layout |= KB_SWAPCTRLCAPS;
#endif

#if NWSKBD > 0
       if ((a.console = mkbd_is_console) != 0) {
               mkbd_is_console = 0;
               if (!mkbd_console_initted)
                       wskbd_cnattach(&mkbd_consops, NULL, &mkbd_keymapdata);
               mkbd_console_softc = sc;
       }
       a.keymap = &mkbd_keymapdata;
       a.accessops = &mkbd_accessops;
       a.accesscookie = sc;
       sc->sc_wskbddev = config_found(self, &a, wskbddevprint, CFARGS_NONE);
#endif

       maple_set_callback(parent, sc->sc_unit, MAPLE_FN_KEYBOARD,
           mkbd_intr, sc);
       maple_enable_periodic(parent, sc->sc_unit, MAPLE_FN_KEYBOARD, 1);
}

static int
mkbddetach(device_t self, int flags)
{
       struct mkbd_softc *sc = device_private(self);
       int rv = 0;

       if (sc == mkbd_console_softc) {
               /*
                * Hack to allow another Maple keyboard to be new console.
                * XXX Should some other type device can be console.
                */
               printf("%s: was console keyboard\n", device_xname(sc->sc_dev));
               wskbd_cndetach();
               mkbd_console_softc = NULL;
               mkbd_console_initted = 0;
               mkbd_is_console = 1;
       }
       if (sc->sc_wskbddev)
               rv = config_detach(sc->sc_wskbddev, flags);

       return rv;
}

int
mkbd_enable(void *v, int on)
{

       return 0;
}

void
mkbd_set_leds(void *v, int on)
{
}

int
mkbd_ioctl(void *v, u_long cmd, void *data, int flag, struct lwp *l)
{

       switch (cmd) {
       case WSKBDIO_GTYPE:
               *(int *) data = WSKBD_TYPE_MAPLE;
               return 0;
       case WSKBDIO_SETLEDS:
               return 0;
       case WSKBDIO_GETLEDS:
               *(int *) data = 0;
               return 0;
       case WSKBDIO_COMPLEXBELL:
               return 0;
       }

       return EPASSTHROUGH;
}

int
mkbd_cnattach(void)
{

       wskbd_cnattach(&mkbd_consops, NULL, &mkbd_keymapdata);
       mkbd_console_initted = 1;
       mkbd_is_console = 1;

       return 0;
}

static int polledkey;
extern int maple_polling;

#define SHIFT_KEYCODE_BASE 0xe0
#define UP_KEYCODE_FLAG 0x1000

#define KEY_UP(n) do {                                                  \
       if (maple_polling)                                              \
               polledkey = (n)|UP_KEYCODE_FLAG;                        \
       else                                                            \
               wskbd_input(sc->sc_wskbddev, WSCONS_EVENT_KEY_UP, (n)); \
       } while (/*CONSTCOND*/0)

#define KEY_DOWN(n) do {                                                \
       if (maple_polling)                                              \
               polledkey = (n);                                        \
       else                                                            \
               wskbd_input(sc->sc_wskbddev, WSCONS_EVENT_KEY_DOWN, (n)); \
       } while (/*CONSTCOND*/0)

#define SHIFT_UP(n)     KEY_UP((n) | SHIFT_KEYCODE_BASE)
#define SHIFT_DOWN(n)   KEY_DOWN((n) | SHIFT_KEYCODE_BASE)

static void
mkbd_intr(void *arg, struct maple_response *response, int sz, int flags)
{
       struct mkbd_softc *sc = arg;
       struct mkbd_condition *kbddata = (void *) response->data;

       if ((flags & MAPLE_FLAG_PERIODIC) &&
           sz >= sizeof(struct mkbd_condition)) {
               int i, j, v;

               v = sc->sc_condition.shift & ~kbddata->shift;
               if (v)
                       for (i = 0; i < 8; i++)
                               if (v & (1 << i))
                                       SHIFT_UP(i);

               v = kbddata->shift & ~sc->sc_condition.shift;
               if (v)
                       for (i = 0; i < 8; i++)
                               if (v & (1 << i))
                                       SHIFT_DOWN(i);

               for (i = 0, j = 0; i < 6; i++)
                       if (sc->sc_condition.key[i] < 4)
                               break;
                       else if (sc->sc_condition.key[i] == kbddata->key[j])
                               j++;
                       else
                               KEY_UP(sc->sc_condition.key[i]);

               for (; j < 6; j++)
                       if (kbddata->key[j] < 4)
                               break;
                       else
                               KEY_DOWN(kbddata->key[j]);

               memcpy(&sc->sc_condition, kbddata,
                   sizeof(struct mkbd_condition));
       }
}

void
mkbd_cngetc(void *v, u_int *type, int *data)
{
       int key;

       polledkey = -1;
       maple_polling = 1;
       while (polledkey == -1) {
               if (mkbd_console_softc != NULL &&
                   mkbd_console_softc->sc_parent != NULL) {
                       DELAY(20000);
                       maple_run_polling(mkbd_console_softc->sc_parent);
               }
       }
       maple_polling = 0;
       key = polledkey;

       *data = key & ~UP_KEYCODE_FLAG;
       *type = (key & UP_KEYCODE_FLAG) ?
           WSCONS_EVENT_KEY_UP : WSCONS_EVENT_KEY_DOWN;
}

void
mkbd_cnpollc(void *v, int on)
{
}

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