/*      $NetBSD: vrled.c,v 1.9 2012/10/27 17:17:56 chs Exp $    */

/*
* Copyright (c) 2000 SATO Kazumi. 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 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 AUTHOR 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: vrled.c,v 1.9 2012/10/27 17:17:56 chs Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/reboot.h>

#include <machine/bus.h>
#include <machine/config_hook.h>

#include <hpcmips/vr/vripif.h>
#include <hpcmips/vr/vrledvar.h>
#include <hpcmips/vr/vrledreg.h>


#ifdef VRLEDDEBUG
#ifndef VRLEDDEBUG_CONF
#define VRLEDDEBUG_CONF 0
#endif /* VRLEDDEBUG_CONF */
int vrleddebug = VRLEDDEBUG_CONF;
#define DPRINTF(arg) if (vrleddebug) printf arg;
#define VPRINTF(arg) if (bootverbose||vrleddebug) printf arg;
#else /* VRLEDDEBUG */
#define DPRINTF(arg)
#define VPRINTF(arg) if (bootverbose) printf arg;
#endif /* VRLEDDEBUG */

static int vrledmatch(device_t, cfdata_t, void *);
static void vrledattach(device_t, device_t, void *);

static void vrled_write(struct vrled_softc *, int, unsigned short);
static unsigned short vrled_read(struct vrled_softc *, int);

static void vrled_stop(struct vrled_softc *);
static void vrled_on(struct vrled_softc *);
static void vrled_blink(struct vrled_softc *);
static void vrled_flash(struct vrled_softc *);
static void vrled_change_state(struct vrled_softc *);
static int vrled_event(void *, int, long, void *);

int vrled_intr(void *);

CFATTACH_DECL_NEW(vrled, sizeof(struct vrled_softc),
   vrledmatch, vrledattach, NULL, NULL);

struct vrled_softc *this_led;

static inline void
vrled_write(struct vrled_softc *sc, int port, unsigned short val)
{

       bus_space_write_2(sc->sc_iot, sc->sc_ioh, port, val);
}

static inline unsigned short
vrled_read(struct vrled_softc *sc, int port)
{

       return (bus_space_read_2(sc->sc_iot, sc->sc_ioh, port));
}

static int
vrledmatch(device_t parent, cfdata_t cf, void *aux)
{

       return (1);
}

static void
vrledattach(device_t parent, device_t self, void *aux)
{
       struct vrled_softc *sc = device_private(self);
       struct vrip_attach_args *va = aux;

       bus_space_tag_t iot = va->va_iot;
       bus_space_handle_t ioh;

       if (bus_space_map(iot, va->va_addr, 1, 0, &ioh)) {
               printf(": can't map bus space\n");
               return;
       }

       sc->sc_iot = iot;
       sc->sc_ioh = ioh;

       if (!(sc->sc_handler =
           vrip_intr_establish(va->va_vc, va->va_unit, 0, IPL_TTY,
               vrled_intr, sc))) {
               printf (": can't map interrupt line.\n");
               return;
       }

       printf("\n");
       /* clear interrupt status */
       vrled_write(sc, LEDINT_REG_W, LEDINT_ALL);

       /* basic setup */
       sc->sc_state_cnt = 1;
       vrled_write(sc, LEDASTC_REG_W, 1); /* 1time */
       vrled_write(sc, LEDCNT_REG_W, LEDCNT_AUTOSTOP);
       vrled_stop(sc);

       sc->sc_hook = config_hook(CONFIG_HOOK_SET,
           CONFIG_HOOK_LED, CONFIG_HOOK_SHARE, vrled_event, sc);

       this_led = sc;
}


/*
* LED interrupt handler.
*
*/
int
vrled_intr(void *arg)
{
       struct vrled_softc *sc = arg;
       unsigned int intstat;

       intstat = vrled_read(sc, LEDINT_REG_W);
       /* clear interrupt status */
       vrled_write(sc, LEDINT_REG_W, intstat);
       if (intstat&LEDINT_AUTOSTOP) {
               vrled_change_state(sc);
       }
       return (0);
}

/*
* LED turn OFF
*
*/
void
vrled_stop(struct vrled_softc *sc)
{
       vrled_write(sc, LEDHTS_REG_W, LEDHTS_DIV16SEC);
       vrled_write(sc, LEDLTS_REG_W, LEDLTS_4SEC);
       vrled_write(sc, LEDASTC_REG_W, 2); /* 2time */
       vrled_write(sc, LEDCNT_REG_W, LEDCNT_AUTOSTOP);

       sc->sc_state = LEDOFF;
       sc->sc_next = LEDOFF;
}

/*
* LED turn ON
*
*/
void
vrled_on(struct vrled_softc *sc)
{
       vrled_write(sc, LEDHTS_REG_W, LEDHTS_SEC);
       vrled_write(sc, LEDLTS_REG_W, LEDLTS_DIV16SEC);
       vrled_write(sc, LEDASTC_REG_W, 2); /* 2time */
       vrled_write(sc, LEDCNT_REG_W, LEDCNT_AUTOSTOP|LEDCNT_BLINK);

       sc->sc_state = LEDON;
       sc->sc_next = LEDON;
}

/*
* LED blink
*
*/
void
vrled_blink(struct vrled_softc *sc)
{
       int ledhts;
       int ledlts;

       switch (sc->sc_next) {
       case LED1SB:
               ledhts = LEDHTS_DIV2SEC;
               ledlts = LEDLTS_DIV2SEC;
               break;
       case LED2SB:
               ledhts = LEDHTS_SEC;
               ledlts = LEDLTS_SEC;
               break;
       default:
               vrled_stop(sc);
               return;
       }

       vrled_write(sc, LEDHTS_REG_W, ledhts);
       vrled_write(sc, LEDLTS_REG_W, ledlts);
       vrled_write(sc, LEDASTC_REG_W, 2); /* 2time */
       vrled_write(sc, LEDCNT_REG_W, LEDCNT_AUTOSTOP);
       vrled_write(sc, LEDCNT_REG_W, LEDCNT_AUTOSTOP|LEDCNT_BLINK);

       sc->sc_state = sc->sc_next;
}

/*
* LED flash once
*
*/
void
vrled_flash(struct vrled_softc *sc)
{
       int ledhts;
       int ledlts;

       switch (sc->sc_next) {
       case LED8DIVF:
               ledhts = LEDHTS_DIV16SEC;
               ledlts = LEDLTS_DIV16SEC;
               break;
       case LED4DIVF:
               ledhts = LEDHTS_DIV8SEC;
               ledlts = LEDLTS_DIV8SEC;
               break;
       case LED2DIVF:
               ledhts = LEDHTS_DIV4SEC;
               ledlts = LEDLTS_DIV4SEC;
               break;
       case LED1SF:
               ledhts = LEDHTS_DIV2SEC;
               ledlts = LEDLTS_DIV2SEC;
               break;
       default:
               vrled_stop(sc);
               return;
       }

       vrled_write(sc, LEDHTS_REG_W, ledhts);
       vrled_write(sc, LEDLTS_REG_W, ledlts);
       vrled_write(sc, LEDASTC_REG_W, 2); /* 2time */
       vrled_write(sc, LEDCNT_REG_W, LEDCNT_AUTOSTOP|LEDCNT_BLINK);

       sc->sc_state = sc->sc_next;
       sc->sc_next = LEDOFF;
       sc->sc_state_cnt = 1;
}

/*
* Change LED state
*
*/
void
vrled_change_state(struct vrled_softc *sc)
{

       switch (sc->sc_next) {
       case LEDOFF:
               vrled_stop(sc);
               break;
       case LEDON:
               vrled_on(sc);
               break;
       case LED1SB:
       case LED2SB:
               vrled_blink(sc);
               break;
       case LED8DIVF:
       case LED4DIVF:
       case LED2DIVF:
       case LED1SF:
               vrled_flash(sc);
               break;
       default:
               vrled_stop(sc);
               break;
       }
}

/*
* Set LED state
*
*/
void
vrled_set_state(struct vrled_softc *sc, vrled_status state)
{

       int ledstate;

       ledstate = vrled_read(sc, LEDCNT_REG_W);
       if (ledstate&LEDCNT_BLINK) { /* currently processing */
               if (sc->sc_next == state)
                       sc->sc_state_cnt++;
               switch (sc->sc_next) {
               case LEDOFF:
               case LEDON:
                       sc->sc_next = state;
                       break;
               case LED8DIVF:
               case LED4DIVF:
               case LED2DIVF:
               case LED1SF:
                       switch (state) {
                       case LEDOFF:
                       case LED8DIVF:
                       case LED4DIVF:
                       case LED2DIVF:
                       case LED1SF:
                               sc->sc_next = state;
                               break;
                       default:
                               break;
                       }
                       break;
               case LED1SB:
               case LED2SB:
                       switch (state) {
                       case LEDOFF:
                       case LEDON:
                       case LED1SB:
                       case LED2SB:
                               sc->sc_next = state;
                               break;
                       default:
                               break;
                       }
                       break;
               default:
                       sc->sc_next = LEDOFF;
                       break;
               }
               return;
       }
       sc->sc_next = state;
       vrled_change_state(sc);
}

/*
* LED config hook events
*
*/
int
vrled_event(void *ctx, int type, long id, void *msg)
{
       struct vrled_softc *sc = (struct vrled_softc *)ctx;
       int why =*(int *)msg;

       if (type != CONFIG_HOOK_SET
           || id != CONFIG_HOOK_LED)
               return (1);
       if (msg == NULL)
               return (1);

       switch (why) {
       case CONFIG_HOOK_LED_OFF:
               vrled_set_state(sc, LEDOFF);
               break;
       case CONFIG_HOOK_LED_ON:
               vrled_set_state(sc, LEDON);
               break;
       case CONFIG_HOOK_LED_FLASH:
               vrled_set_state(sc, LED8DIVF);
               break;
       case CONFIG_HOOK_LED_FLASH2:
               vrled_set_state(sc, LED4DIVF);
               break;
       case CONFIG_HOOK_LED_FLASH5:
               vrled_set_state(sc, LED2DIVF);
               break;
       case CONFIG_HOOK_LED_BLINK:
               vrled_set_state(sc, LED1SB);
               break;
       case CONFIG_HOOK_LED_BLINK2:
               vrled_set_state(sc, LED2SB);
               break;
       default:
               vrled_set_state(sc, LEDOFF);
       }
       return (0);
}

/* end */

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