NetBSD/sys/arch/amiga/dev/drbbc.c

200 lines
5.3 KiB
C

/* $NetBSD: drbbc.c,v 1.8 2002/01/28 09:56:53 aymeric 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 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: drbbc.c,v 1.8 2002/01/28 09:56:53 aymeric 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/ic/ds.h>
int draco_ds_read_bit(void *);
void draco_ds_write_bit(void *, int);
void draco_ds_reset(void *);
void drbbc_attach(struct device *, struct device *, void *);
int drbbc_match(struct device *, struct cfdata *, void *);
int dracougettod(struct timeval *);
#ifdef __NOTYET__
int dracousettod(struct timeval *);
#endif
struct drbbc_softc {
struct device sc_dev;
struct ds_handle sc_dsh;
};
struct cfattach drbbc_ca = {
sizeof(struct drbbc_softc),
drbbc_match,
drbbc_attach
};
struct drbbc_softc *drbbc_sc;
int
drbbc_match(struct device *pdp, struct cfdata *cfp, void *auxp)
{
static int drbbc_matched = 0;
/* Allow only one instance. */
if (!is_draco() || !matchname(auxp, "drbbc") || drbbc_matched)
return (0);
drbbc_matched = 1;
return (1);
}
void
drbbc_attach(struct device *pdp, struct device *dp, void *auxp)
{
int i;
struct drbbc_softc *sc;
u_int8_t rombuf[8];
sc = (struct drbbc_softc *)dp;
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*NBPG);
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);
ugettod = dracougettod;
usettod = (void *)0;
drbbc_sc = sc;
}
int
draco_ds_read_bit(void *p)
{
struct drioct *draco_ioct;
draco_ioct = p;
while (draco_ioct->io_status & DRSTAT_CLKBUSY);
draco_ioct->io_clockw1 = 0;
while (draco_ioct->io_status & DRSTAT_CLKBUSY);
return (draco_ioct->io_status & DRSTAT_CLKDAT);
}
void
draco_ds_write_bit(void *p, int b)
{
struct drioct *draco_ioct;
draco_ioct = p;
while (draco_ioct->io_status & DRSTAT_CLKBUSY);
if (b)
draco_ioct->io_clockw1 = 0;
else
draco_ioct->io_clockw0 = 0;
}
void
draco_ds_reset(void *p)
{
struct drioct *draco_ioct;
draco_ioct = p;
draco_ioct->io_clockrst = 0;
}
int
dracougettod(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 wr. 1.1.1970; AmigaOS time wrt. 1.1.1978 */
clkbuf += (8*365 + 2) * 86400;
tvp->tv_sec = clkbuf;
tvp->tv_usec = usecs;
return (1);
}