/*      $NetBSD: adb.c,v 1.37 2021/08/07 16:18:57 thorpej Exp $ */

/*-
* Copyright (C) 1994   Bradley A. Grantham
* 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: adb.c,v 1.37 2021/08/07 16:18:57 thorpej 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 <machine/autoconf.h>
#include <machine/pio.h>

#include <macppc/dev/adbvar.h>
#include <macppc/dev/akbdvar.h>
#include <macppc/dev/pm_direct.h>
#include <macppc/dev/viareg.h>

#include <dev/clock_subr.h>
#include <dev/ofw/openfirm.h>

#include "aed.h"
#include "apm.h"

/*
* Function declarations.
*/
static int      adbmatch(device_t, cfdata_t, void *);
static void     adbattach(device_t, device_t, void *);
static int      adbprint(void *, const char *);
static void     adb_todr_init(void);

/*
* Global variables.
*/
int     adb_polling = 0;        /* Are we polling?  (Debugger mode) */
int     adb_initted = 0;        /* adb_init() has completed successfully */
#ifdef ADB_DEBUG
int     adb_debug = 0;          /* Output debugging messages */
#endif /* ADB_DEBUG */

/*
* Driver definition.
*/
CFATTACH_DECL_NEW(adb, sizeof(struct adb_softc),
   adbmatch, adbattach, NULL, NULL);

static int
adbmatch(device_t parent, cfdata_t cf, void *aux)
{
       struct confargs *ca = aux;

       if (ca->ca_nreg < 8)
               return 0;

       if (ca->ca_nintr < 4)
               return 0;

       if (strcmp(ca->ca_name, "via-cuda") == 0)
               return 1;

       if (strcmp(ca->ca_name, "via-pmu") == 0)
               return 1;

       return 0;
}

static void
adbattach(device_t parent, device_t self, void *aux)
{
       struct adb_softc *sc = device_private(self);
       struct confargs *ca = aux;
       int irq = ca->ca_intr[0];
       int node;
       ADBDataBlock adbdata;
       struct adb_attach_args aa_args;
       int totaladbs;
       int adbindex, adbaddr, adb_node;

       extern volatile uint8_t *Via1Base;

       ca->ca_reg[0] += ca->ca_baseaddr;

       sc->sc_regbase = mapiodev(ca->ca_reg[0], ca->ca_reg[1], false);
       Via1Base = sc->sc_regbase;

       if (strcmp(ca->ca_name, "via-cuda") == 0)
               adbHardware = ADB_HW_CUDA;
       else if (strcmp(ca->ca_name, "via-pmu") == 0)
               adbHardware = ADB_HW_PMU;

       node = of_getnode_byname(OF_parent(ca->ca_node), "extint-gpio1");
       if (node)
               OF_getprop(node, "interrupts", &irq, 4);

       printf(" irq %d: ", irq);

       adb_polling = 1;
       adb_node = of_getnode_byname(ca->ca_node, "adb");
       if (adb_node)
               ADBReInit();

       switch (adbHardware) {
       case ADB_HW_CUDA:
               intr_establish_xname(irq, IST_LEVEL, IPL_TTY, adb_intr_cuda, sc,
                   device_xname(self));
               break;
       case ADB_HW_PMU:
               intr_establish_xname(irq, IST_LEVEL, IPL_TTY, pm_intr, sc,
                   device_xname(self));
               pm_init();
               break;
       }

       adb_todr_init();

#if NAPM > 0
       /* Magic for signalling the apm driver to match. */
       aa_args.origaddr = ADBADDR_APM;
       aa_args.adbaddr = ADBADDR_APM;
       aa_args.handler_id = ADBADDR_APM;

       (void)config_found(self, &aa_args, NULL, CFARGS_NONE);
#endif

       /*
        * see if we're supposed to have an ADB bus
        * since some PowerBooks don't have one and their PMUs barf on ADB
        * commands we bail here if there's no adb node
        */
       if (!adb_node)
               return;

#ifdef ADB_DEBUG
       if (adb_debug)
               printf("adb: done with ADBReInit\n");
#endif
       totaladbs = CountADBs();

       printf("%d targets\n", totaladbs);

#if NAED > 0
       /* ADB event device for compatibility */
       aa_args.origaddr = 0;
       aa_args.adbaddr = 0;
       aa_args.handler_id = 0;
       (void)config_found(self, &aa_args, adbprint, CFARGS_NONE);
#endif

       /* for each ADB device */
       for (adbindex = 1; adbindex <= totaladbs; adbindex++) {
               /* Get the ADB information */
               adbaddr = GetIndADB(&adbdata, adbindex);

               aa_args.origaddr = adbdata.origADBAddr;
               aa_args.adbaddr = adbaddr;
               aa_args.handler_id = adbdata.devType;

               (void)config_found(self, &aa_args, adbprint, CFARGS_NONE);
       }

       if (adbHardware == ADB_HW_CUDA)
               adb_cuda_autopoll();
       adb_polling = 0;

}

int
adbprint(void *args, const char *name)
{
       struct adb_attach_args *aa_args = (struct adb_attach_args *)args;
       int rv = UNCONF;

       if (name) {     /* no configured device matched */
               rv = UNSUPP; /* most ADB device types are unsupported */

               /* print out what kind of ADB device we have found */
               aprint_normal("%s addr %d: ", name, aa_args->adbaddr);
               switch(aa_args->origaddr) {
#ifdef DIAGNOSTIC
               case 0:
                       aprint_normal("ADB event device");
                       rv = UNCONF;
                       break;
               case ADBADDR_SECURE:
                       aprint_normal("security dongle (%d)",
                           aa_args->handler_id);
                       break;
#endif
               case ADBADDR_MAP:
                       aprint_normal("mapped device (%d)",
                           aa_args->handler_id);
                       rv = UNCONF;
                       break;
               case ADBADDR_REL:
                       aprint_normal("relative positioning device (%d)",
                           aa_args->handler_id);
                       rv = UNCONF;
                       break;
#ifdef DIAGNOSTIC
               case ADBADDR_ABS:
                       switch (aa_args->handler_id) {
                       case ADB_ARTPAD:
                               aprint_normal("WACOM ArtPad II");
                               break;
                       default:
                               aprint_normal("absolute positioning device (%d)",
                                   aa_args->handler_id);
                               break;
                       }
                       break;
               case ADBADDR_DATATX:
                       aprint_normal("data transfer device (modem?) (%d)",
                           aa_args->handler_id);
                       break;
               case ADBADDR_MISC:
                       switch (aa_args->handler_id) {
                       case ADB_POWERKEY:
                               aprint_normal("Sophisticated Circuits PowerKey");
                               break;
                       default:
                               aprint_normal("misc. device (remote control?) (%d)",
                                   aa_args->handler_id);
                               break;
                       }
                       break;
               default:
                       aprint_normal("unknown type device, (handler %d)",
                           aa_args->handler_id);
                       break;
#endif /* DIAGNOSTIC */
               }
       } else          /* a device matched and was configured */
               aprint_normal(" addr %d: ", aa_args->adbaddr);

       return rv;
}

#define DIFF19041970 2082844800

static int
adb_todr_get(todr_chip_handle_t tch, struct timeval *tvp)
{
       unsigned long sec;

       if (adb_read_date_time(&sec) != 0)
               return EIO;
       tvp->tv_sec = sec - DIFF19041970;
       tvp->tv_usec = 0;
       return 0;
}

static int
adb_todr_set(todr_chip_handle_t tch, struct timeval *tvp)
{
       unsigned long sec;

       sec = tvp->tv_sec + DIFF19041970;
       return adb_set_date_time(sec) ? EIO : 0;
}

void
adb_todr_init(void)
{
       static struct todr_chip_handle tch = {
               .todr_gettime = adb_todr_get,
               .todr_settime = adb_todr_set
       };

       todr_attach(&tch);
}

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