/*      $NetBSD: nbpkbd.c,v 1.3 2021/08/07 16:18:53 thorpej Exp $ */
/*
* Copyright (c) 2011 KIYOHARA Takashi
* 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.
*
* 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: nbpkbd.c,v 1.3 2021/08/07 16:18:53 thorpej Exp $");

#include <sys/param.h>
#include <sys/callout.h>
#include <sys/device.h>
#include <sys/errno.h>
#include <sys/kernel.h>

#include <machine/platid.h>
#include <machine/platid_mask.h>

#include <arm/xscale/pxa2x0_i2c.h>

#include <hpcarm/dev/nbppconvar.h>

#include <dev/hpc/hpckbdvar.h>

#include <dev/i2c/i2cvar.h>

#include "locators.h"

#ifdef NBPKBD_DEBUG
#define DPRINTF(x)      printf x
#else
#define DPRINTF(x)
#endif

#define IS_KEY_DOWN(x)  (((x) & 0x80) == 0x00)
#define KEY_CODE(x)     ((x) & 0x7f)
#define KEY_INITIAL_INTERVAL    (500 * hz / 1000)       /* 500ms */
#define KEY_REPEAT_INTERVAL     (200 * hz / 1000)       /* 200ms */

struct nbpkbd_softc {
       device_t sc_dev;
       device_t sc_parent;
       int sc_tag;

       struct hpckbd_ic_if sc_if;
       struct hpckbd_if *sc_hpckbd;

       int sc_enabled;

       callout_t  sc_callout;
       uint8_t sc_last_scancode;
};

static int nbpkbd_match(device_t, cfdata_t, void *);
static void nbpkbd_attach(device_t, device_t, void *);

static int nbpkbd_input_establish(void *, struct hpckbd_if *);
static int nbpkbd_input(void *, int, char *);
static int nbpkbd_poll(void *);

static void nbpkbd_key_repeat(void *);

CFATTACH_DECL_NEW(nbpkbd, sizeof(struct nbpkbd_softc),
   nbpkbd_match, nbpkbd_attach, NULL, NULL);


/* ARGSUSED */
static int
nbpkbd_match(device_t parent, cfdata_t match, void *aux)
{
       struct nbppcon_attach_args *pcon = aux;

       if (strcmp(pcon->aa_name, match->cf_name) ||
           pcon->aa_tag == NBPPCONCF_TAG_DEFAULT)
               return 0;

       return 1;
}

static void
nbpkbd_attach(device_t parent, device_t self, void *aux)
{
       struct nbpkbd_softc *sc = device_private(self);
       struct nbppcon_attach_args *pcon = aux;
       struct hpckbd_attach_args haa;

       aprint_normal(": NETBOOK PRO Keyboard\n");
       aprint_naive("\n");

       sc->sc_dev = self;
       sc->sc_parent = parent;
       sc->sc_tag = pcon->aa_tag;
       sc->sc_if.hii_ctx = sc;
       sc->sc_if.hii_establish = nbpkbd_input_establish;
       sc->sc_if.hii_poll = nbpkbd_poll;

       hpckbd_cnattach(&sc->sc_if);

       callout_init(&sc->sc_callout, 0);
       callout_setfunc(&sc->sc_callout, nbpkbd_key_repeat, sc);

       /* Attach hpckbd */
       haa.haa_ic = &sc->sc_if;
       config_found(self, &haa, hpckbd_print, CFARGS_NONE);

       if (nbppcon_regist_callback(parent, sc->sc_tag, nbpkbd_input, sc) ==
           NULL)
               aprint_error_dev(self, "callback regist failed\n");
}


static int
nbpkbd_input_establish(void *arg, struct hpckbd_if *kbdif)
{
       struct nbpkbd_softc *sc = arg;

       sc->sc_hpckbd = kbdif;
       sc->sc_enabled = 1;

       return 0;
}

static int
nbpkbd_input(void *arg, int buflen, char *buf)
{
       struct nbpkbd_softc *sc = arg;

#ifdef NBPKBD_DEBUG
       {
               int i;

               printf("%s:", __func__);
               for (i = 0; i < buflen; i++)
                       printf(" %02x", buf[i]);
               printf("\n");
       }
#endif

       if (buflen != 2) {
               aprint_error_dev(sc->sc_dev, "ugly length %d\n", buflen);
               return -1;
       }

       hpckbd_input(sc->sc_hpckbd, IS_KEY_DOWN(buf[1]), KEY_CODE(buf[1]));

       sc->sc_last_scancode = buf[1];
       if (IS_KEY_DOWN(buf[1]))
               callout_schedule(&sc->sc_callout, KEY_INITIAL_INTERVAL);
       else
               callout_stop(&sc->sc_callout);

       delay(50);      /* XXXX */

       if (nbppcon_kbd_ready(sc->sc_parent) != 0)
               aprint_error_dev(sc->sc_dev,
                   "%s: kbd-ready failed\n", __func__);

       return 0;
}

static int
nbpkbd_poll(void *arg)
{
       struct nbpkbd_softc *sc = arg;
       int rv, s;
       char buf[2];

       if (!sc->sc_enabled)
               return 0;

       s = spltty();

       rv = nbppcon_poll(sc->sc_parent, sc->sc_tag, sizeof(buf), buf);

       DPRINTF(("%s: received %02x %02x\n",
           device_xname(sc->sc_dev), buf[0], buf[1]));

       hpckbd_input(sc->sc_hpckbd, IS_KEY_DOWN(buf[1]), KEY_CODE(buf[1]));

       delay(50);      /* XXXX */

       rv = nbppcon_kbd_ready(sc->sc_parent);

       splx(s);

       if (rv != 0)
               aprint_error_dev(sc->sc_dev,
                   "%s: kbd-ready failed\n", __func__);

       return 0;
}

static void
nbpkbd_key_repeat(void *arg)
{
       struct nbpkbd_softc *sc = arg;

       hpckbd_input(sc->sc_hpckbd, IS_KEY_DOWN(sc->sc_last_scancode),
           KEY_CODE(sc->sc_last_scancode));

       if (IS_KEY_DOWN(sc->sc_last_scancode))
               callout_schedule(&sc->sc_callout, KEY_REPEAT_INTERVAL);
}

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