/*      $NetBSD: drbbc.c,v 1.20 2012/10/27 17:17:28 chs Exp $ */

/*-
* Copyright (c) 1997 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Ignatios Souvatzis.
*
* 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 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: drbbc.c,v 1.20 2012/10/27 17:17:28 chs Exp $");

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

#if 0
#include <machine/psl.h>
#endif
#include <machine/cpu.h>
#include <amiga/amiga/device.h>
#include <amiga/amiga/custom.h>
#include <amiga/amiga/cia.h>
#include <amiga/amiga/drcustom.h>
#include <amiga/dev/rtc.h>

#include <dev/clock_subr.h>
#include <dev/ic/ds.h>

int draco_ds_read_bit(void *);
void draco_ds_write_bit(void *, int);
void draco_ds_reset(void *);

void drbbc_attach(device_t, device_t, void *);
int drbbc_match(device_t, cfdata_t, void *);

int dracougettod(todr_chip_handle_t, struct timeval *);
int dracousettod(todr_chip_handle_t, struct timeval *);

static struct todr_chip_handle dracotodr;
struct drbbc_softc {
       struct ds_handle sc_dsh;
};

CFATTACH_DECL_NEW(drbbc, sizeof(struct drbbc_softc),
   drbbc_match, drbbc_attach, NULL, NULL);

struct drbbc_softc *drbbc_sc;

int
drbbc_match(device_t parent, cfdata_t cf, void *aux)
{
       static int drbbc_matched = 0;

       /* Allow only one instance. */
       if (!is_draco() || !matchname(aux, "drbbc") || drbbc_matched)
               return (0);

       drbbc_matched = 1;
       return (1);
}

void
drbbc_attach(device_t parent, device_t self, void *aux)
{
       int i;
       struct drbbc_softc *sc;
       u_int8_t rombuf[8];

       sc = device_private(self);

       sc->sc_dsh.ds_read_bit = draco_ds_read_bit;
       sc->sc_dsh.ds_write_bit = draco_ds_write_bit;
       sc->sc_dsh.ds_reset = draco_ds_reset;
       sc->sc_dsh.ds_hw_handle = (void *)(DRCCADDR + DRIOCTLPG*PAGE_SIZE);

       sc->sc_dsh.ds_reset(sc->sc_dsh.ds_hw_handle);

       ds_write_byte(&sc->sc_dsh, DS_ROM_READ);
       for (i=0; i<8; ++i)
               rombuf[i] = ds_read_byte(&sc->sc_dsh);

       hostid = (rombuf[3] << 24) + (rombuf[2] << 16) +
               (rombuf[1] << 8) + rombuf[7];

       printf(": ROM %02x %02x%02x%02x%02x%02x%02x %02x (DraCo sernum %ld)\n",
               rombuf[7], rombuf[6], rombuf[5], rombuf[4],
               rombuf[3], rombuf[2], rombuf[1], rombuf[0],
               hostid);

       drbbc_sc = sc;
       dracotodr.cookie = sc;
       dracotodr.todr_gettime = dracougettod;
       dracotodr.todr_settime = dracousettod;
       todr_attach(&dracotodr);
}

int
draco_ds_read_bit(void *p)
{
       struct drioct *draco_ioctl;

       draco_ioctl = p;

       while (draco_ioctl->io_status & DRSTAT_CLKBUSY);

       draco_ioctl->io_clockw1 = 0;

       while (draco_ioctl->io_status & DRSTAT_CLKBUSY);

       return (draco_ioctl->io_status & DRSTAT_CLKDAT);
}

void
draco_ds_write_bit(void *p, int b)
{
       struct drioct *draco_ioctl;

       draco_ioctl = p;

       while (draco_ioctl->io_status & DRSTAT_CLKBUSY);

       if (b)
               draco_ioctl->io_clockw1 = 0;
       else
               draco_ioctl->io_clockw0 = 0;
}

void
draco_ds_reset(void *p)
{
       struct drioct *draco_ioctl;

       draco_ioctl = p;

       draco_ioctl->io_clockrst = 0;
}

int
dracougettod(todr_chip_handle_t h, struct timeval *tvp)
{
       u_int32_t clkbuf;
       u_int32_t usecs;

       drbbc_sc->sc_dsh.ds_reset(drbbc_sc->sc_dsh.ds_hw_handle);

       ds_write_byte(&drbbc_sc->sc_dsh, DS_ROM_SKIP);

       ds_write_byte(&drbbc_sc->sc_dsh, DS_MEM_READ_MEMORY);
       /* address of seconds/256: */
       ds_write_byte(&drbbc_sc->sc_dsh, 0x02);
       ds_write_byte(&drbbc_sc->sc_dsh, 0x02);

       usecs = (ds_read_byte(&drbbc_sc->sc_dsh) * 1000000) / 256;
       clkbuf = ds_read_byte(&drbbc_sc->sc_dsh)
           + (ds_read_byte(&drbbc_sc->sc_dsh)<<8)
           + (ds_read_byte(&drbbc_sc->sc_dsh)<<16)
           + (ds_read_byte(&drbbc_sc->sc_dsh)<<24);

       /* BSD time is wrt. 1.1.1970; AmigaOS time wrt. 1.1.1978 */

       clkbuf += (8*365 + 2) * 86400;

       tvp->tv_sec = clkbuf;
       tvp->tv_usec = usecs;

       return (0);
}

int
dracousettod(todr_chip_handle_t h, struct timeval *tvp)
{
       return (ENXIO);
}

You are viewing proxied material from ftp.icm.edu.pl. The copyright of proxied material belongs to its original authors. Any comments or complaints in relation to proxied material should be directed to the original authors of the content concerned. Please see the disclaimer for more details.