18b2f7e6a1
by Eduardo Horvath and Simon Burge of Wasabi Systems.
IBM 4xx series CPU features:
- New pmap and revised trap handler.
- Support on-chip timers, PCI controller, UARTs
- Framework for on-chip ethernet and watchdog timer.
General PowerPC features:
- Add in-kernel PPC floating point emulation
- New in{,4}_cksum that is between 1.5 and 5 times faster than the
old version depending on CPU type.
General changes:
- Kernel support for generic dbsym-style symbols.
241 lines
6.6 KiB
C
241 lines
6.6 KiB
C
/* $NetBSD: ds1743.c,v 1.1 2001/06/13 06:01:52 simonb Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1998 Mark Brinicombe.
|
|
* Copyright (c) 1998 Causality Limited.
|
|
* All rights reserved.
|
|
*
|
|
* Written by Mark Brinicombe, Causality Limited
|
|
*
|
|
* 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 Mark Brinicombe
|
|
* for the NetBSD Project.
|
|
* 4. The name of the company nor the name of the author may be used to
|
|
* endorse or promote products derived from this software without specific
|
|
* prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY CAUASLITY LIMITED ``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 CAUSALITY LIMITED 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/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/device.h>
|
|
|
|
#include <machine/autoconf.h>
|
|
#include <machine/rtc.h>
|
|
#include <machine/bus.h>
|
|
|
|
#include <walnut/dev/ds1743reg.h>
|
|
#include <walnut/dev/todclockvar.h>
|
|
|
|
struct dsrtc_softc {
|
|
struct device sc_dev;
|
|
bus_space_tag_t sc_iot;
|
|
bus_space_handle_t sc_ioh;
|
|
};
|
|
|
|
static void dsrtcattach(struct device *, struct device *, void *);
|
|
static int dsrtcmatch(struct device *, struct cfdata *, void *);
|
|
#if 0 /* Nothing uses these yet */
|
|
static int ds1743_ram_read(struct dsrtc_softc *, int);
|
|
static void ds1743_ram_write(struct dsrtc_softc *, int, int);
|
|
#endif
|
|
|
|
static int dsrtc_read(void *, rtc_t *);
|
|
static int dsrtc_write(void *, rtc_t *);
|
|
static inline u_char ds1743_read(struct dsrtc_softc *, int);
|
|
static inline void ds1743_write(struct dsrtc_softc *, int, u_char);
|
|
static u_char ds1743_lock(struct dsrtc_softc *, u_char);
|
|
static void ds1743_unlock(struct dsrtc_softc *, u_char);
|
|
|
|
/* device and attach structures */
|
|
struct cfattach dsrtc_ca = {
|
|
sizeof(struct dsrtc_softc), dsrtcmatch, dsrtcattach
|
|
};
|
|
|
|
/*
|
|
* dsrtcmatch()
|
|
*
|
|
* Validate the IIC address to make sure its an RTC we understand
|
|
*/
|
|
int ds1743found = 0;
|
|
|
|
static int
|
|
dsrtcmatch(struct device *parent, struct cfdata *cf, void *aux)
|
|
{
|
|
union mainbus_attach_args *maa = aux;
|
|
|
|
/* match only RTC devices */
|
|
if (strcmp(maa->mba_rmb.rmb_name, cf->cf_driver->cd_name) != 0)
|
|
return 0;
|
|
|
|
return (!ds1743found);
|
|
}
|
|
|
|
/*
|
|
* dsrtcattach()
|
|
*
|
|
* Attach the rtc device
|
|
*/
|
|
|
|
static void
|
|
dsrtcattach(struct device *parent, struct device *self, void *aux)
|
|
{
|
|
struct dsrtc_softc *sc = (struct dsrtc_softc *)self;
|
|
union mainbus_attach_args *maa = aux;
|
|
struct todclock_attach_args ta;
|
|
|
|
ds1743found = 1;
|
|
|
|
sc->sc_iot = 0;
|
|
sc->sc_ioh = maa->mba_rmb.rmb_addr;
|
|
if (bus_space_map(sc->sc_iot, maa->mba_rmb.rmb_addr, DS_SIZE, 0, &sc->sc_ioh)) {
|
|
printf(": can't map i/o space\n");
|
|
return;
|
|
}
|
|
|
|
ds1743_unlock(sc,0); /* Make sure the clock is running */
|
|
if ((ds1743_read(sc, DS_DAY) & DS_CTL_BF) == 0)
|
|
printf(": lithium cell is dead, RTC unreliable");
|
|
printf("\n");
|
|
|
|
#ifdef DEBUG
|
|
{
|
|
rtc_t rtc;
|
|
dsrtc_read(sc,&rtc);
|
|
printf("RTC: %d/%d/%02d%02d %d:%02d:%02d\n",
|
|
rtc.rtc_mon, rtc.rtc_day, rtc.rtc_cen, rtc.rtc_year,
|
|
rtc.rtc_hour, rtc.rtc_min, rtc.rtc_sec);
|
|
}
|
|
#endif
|
|
|
|
|
|
ta.ta_name = "todclock";
|
|
ta.ta_rtc_arg = sc;
|
|
ta.ta_rtc_write = dsrtc_write;
|
|
ta.ta_rtc_read = dsrtc_read;
|
|
ta.ta_flags = 0;
|
|
config_found(self, &ta, NULL);
|
|
}
|
|
|
|
static inline u_char
|
|
ds1743_read(struct dsrtc_softc *sc, int addr)
|
|
{
|
|
|
|
return(bus_space_read_1(sc->sc_iot, sc->sc_ioh, addr));
|
|
}
|
|
|
|
static inline void
|
|
ds1743_write(struct dsrtc_softc *sc, int addr, u_char data)
|
|
{
|
|
|
|
bus_space_write_1(sc->sc_iot, sc->sc_ioh, addr, data);
|
|
}
|
|
|
|
|
|
#if 0 /* Nothing uses these yet */
|
|
static u_char
|
|
ds1743_ram_read(struct dsrtc_softc *sc, int addr)
|
|
{
|
|
|
|
if (addr >= DS_RAM_SIZE)
|
|
return(-1);
|
|
return(ds1743_read(sc, addr));
|
|
}
|
|
|
|
static void
|
|
ds1743_ram_write(struct dsrtc_softc *sc, int addr, u_char val)
|
|
{
|
|
|
|
if (addr >= DS_RAM_SIZE)
|
|
return (-1);
|
|
ds1743_write(sc,addr,val);
|
|
}
|
|
#endif
|
|
|
|
#define BCD(x) ((((x)/10)<<4)|(x%10))
|
|
#define unBCD(v,x) v=x; v = ((v>>4) & 0xf)*10+(v & 0xf)
|
|
|
|
static u_char
|
|
ds1743_lock(struct dsrtc_softc *sc, u_char mode)
|
|
{
|
|
u_char octl,ctl;
|
|
|
|
octl = ds1743_read(sc,DS_CENTURY);
|
|
ctl = octl | (mode & DS_CTL_RW);
|
|
ds1743_write(sc,DS_CENTURY, ctl); /* Lock RTC for both reading and writing */
|
|
return octl;
|
|
}
|
|
|
|
static void
|
|
ds1743_unlock(struct dsrtc_softc *sc, u_char key)
|
|
{
|
|
int ctl;
|
|
|
|
ctl = ds1743_read(sc,DS_CENTURY);
|
|
ctl = (ctl & 0x3f) | (key & DS_CTL_RW);
|
|
ds1743_write(sc,DS_CENTURY, ctl); /* Enable updates */
|
|
}
|
|
|
|
static int
|
|
dsrtc_write(void * arg, rtc_t * rtc)
|
|
{
|
|
struct dsrtc_softc *sc = arg;
|
|
u_char key;
|
|
|
|
key = ds1743_lock(sc,DS_CTL_W);
|
|
|
|
ds1743_write(sc, DS_SECONDS, BCD(rtc->rtc_sec) & 0x7f);
|
|
ds1743_write(sc, DS_MINUTES, BCD(rtc->rtc_min) & 0x7f);
|
|
ds1743_write(sc, DS_HOURS, BCD(rtc->rtc_hour) & 0x3f);
|
|
ds1743_write(sc, DS_DATE, BCD(rtc->rtc_day) & 0x3f);
|
|
ds1743_write(sc, DS_MONTH, BCD(rtc->rtc_mon) & 0x1f);
|
|
ds1743_write(sc, DS_YEAR, BCD(rtc->rtc_year));
|
|
ds1743_write(sc, DS_CENTURY, ((ds1743_read(sc,DS_CENTURY) & DS_CTL_RW)
|
|
| BCD(rtc->rtc_cen)));
|
|
|
|
ds1743_unlock(sc,key);
|
|
dsrtc_read(arg,rtc);
|
|
return(1);
|
|
}
|
|
|
|
static int
|
|
dsrtc_read(void *arg, rtc_t *rtc)
|
|
{
|
|
struct dsrtc_softc *sc = arg;
|
|
u_char key;
|
|
|
|
key = ds1743_lock(sc,DS_CTL_R);
|
|
rtc->rtc_micro = 0;
|
|
rtc->rtc_centi = 0;
|
|
unBCD(rtc->rtc_sec,ds1743_read(sc, DS_SECONDS) & 0x7f);
|
|
unBCD(rtc->rtc_min,ds1743_read(sc, DS_MINUTES) & 0x7f);
|
|
unBCD(rtc->rtc_hour, ds1743_read(sc, DS_HOURS) & 0x3f);
|
|
unBCD(rtc->rtc_day, ds1743_read(sc, DS_DATE) & 0x3f);
|
|
unBCD(rtc->rtc_mon,ds1743_read(sc, DS_MONTH) & 0x1f);
|
|
unBCD(rtc->rtc_year, ds1743_read(sc, DS_YEAR));
|
|
unBCD(rtc->rtc_cen, ds1743_read(sc, DS_CENTURY) & ~DS_CTL_RW);
|
|
|
|
ds1743_unlock(sc,key);
|
|
return(1);
|
|
}
|