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/* $OpenBSD: dsrtc.c,v 1.2 2004/05/19 03:17:07 drahn Exp $ */
/* $NetBSD: dsrtc.c,v 1.5 2003/03/23 14:12:26 chris 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/kernel.h>
#include <sys/conf.h>
#include <sys/device.h>
#include <machine/rtc.h>
#include <arm/footbridge/todclockvar.h>
#include <arm/footbridge/isa/ds1687reg.h>
#include <dev/isa/isavar.h>
#define NRTC_PORTS 2
struct dsrtc_softc {
struct device sc_dev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
};
void dsrtcattach (struct device *parent, struct device *self, void *aux);
int dsrtcmatch (struct device *parent, void *cf, void *aux);
int ds1687_read (struct dsrtc_softc *sc, int addr);
void ds1687_write (struct dsrtc_softc *sc, int addr, int data);
int ds1687_ram_read (struct dsrtc_softc *sc, int addr);
void ds1687_ram_write (struct dsrtc_softc *sc, int addr, int data);
static void ds1687_bank_select (struct dsrtc_softc *, int);
static int dsrtc_write (void *, rtc_t *);
static int dsrtc_read (void *, rtc_t *);
int
ds1687_read(sc, addr)
struct dsrtc_softc *sc;
int addr;
{
bus_space_write_1(sc->sc_iot, sc->sc_ioh, RTC_ADDR_REG, addr);
return(bus_space_read_1(sc->sc_iot, sc->sc_ioh, RTC_DATA_REG));
}
void
ds1687_write(sc, addr, data)
struct dsrtc_softc *sc;
int addr;
int data;
{
bus_space_write_1(sc->sc_iot, sc->sc_ioh, RTC_ADDR_REG, addr);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, RTC_DATA_REG, data);
}
static void
ds1687_bank_select(sc, bank)
struct dsrtc_softc *sc;
int bank;
{
int data;
data = ds1687_read(sc, RTC_REG_A);
data &= ~RTC_REG_A_BANK_MASK;
if (bank)
data |= RTC_REG_A_BANK1;
ds1687_write(sc, RTC_REG_A, data);
}
#if 0
/* Nothing uses these yet */
int
ds1687_ram_read(sc, addr)
struct dsrtc_softc *sc;
int addr;
{
if (addr < RTC_PC_RAM_SIZE)
return(ds1687_read(sc, RTC_PC_RAM_START + addr));
addr -= RTC_PC_RAM_SIZE;
if (addr < RTC_BANK0_RAM_SIZE)
return(ds1687_read(sc, RTC_BANK0_RAM_START + addr));
addr -= RTC_BANK0_RAM_SIZE;
if (addr < RTC_EXT_RAM_SIZE) {
int data;
ds1687_bank_select(sc, 1);
ds1687_write(sc, RTC_EXT_RAM_ADDRESS, addr);
data = ds1687_read(sc, RTC_EXT_RAM_DATA);
ds1687_bank_select(sc, 0);
return(data);
}
return(-1);
}
void
ds1687_ram_write(sc, addr, val)
struct dsrtc_softc *sc;
int addr;
int val;
{
if (addr < RTC_PC_RAM_SIZE)
return(ds1687_write(sc, RTC_PC_RAM_START + addr, val));
addr -= RTC_PC_RAM_SIZE;
if (addr < RTC_BANK0_RAM_SIZE)
return(ds1687_write(sc, RTC_BANK0_RAM_START + addr, val));
addr -= RTC_BANK0_RAM_SIZE;
if (addr < RTC_EXT_RAM_SIZE) {
ds1687_bank_select(sc, 1);
ds1687_write(sc, RTC_EXT_RAM_ADDRESS, addr);
ds1687_write(sc, RTC_EXT_RAM_DATA, val);
ds1687_bank_select(sc, 0);
}
}
#endif
static int
dsrtc_write(arg, rtc)
void *arg;
rtc_t *rtc;
{
struct dsrtc_softc *sc = arg;
ds1687_write(sc, RTC_SECONDS, rtc->rtc_sec);
ds1687_write(sc, RTC_MINUTES, rtc->rtc_min);
ds1687_write(sc, RTC_HOURS, rtc->rtc_hour);
ds1687_write(sc, RTC_DAYOFMONTH, rtc->rtc_day);
ds1687_write(sc, RTC_MONTH, rtc->rtc_mon);
ds1687_write(sc, RTC_YEAR, rtc->rtc_year);
ds1687_bank_select(sc, 1);
ds1687_write(sc, RTC_CENTURY, rtc->rtc_cen);
ds1687_bank_select(sc, 0);
return(1);
}
static int
dsrtc_read(arg, rtc)
void *arg;
rtc_t *rtc;
{
struct dsrtc_softc *sc = arg;
rtc->rtc_micro = 0;
rtc->rtc_centi = 0;
rtc->rtc_sec = ds1687_read(sc, RTC_SECONDS);
rtc->rtc_min = ds1687_read(sc, RTC_MINUTES);
rtc->rtc_hour = ds1687_read(sc, RTC_HOURS);
rtc->rtc_day = ds1687_read(sc, RTC_DAYOFMONTH);
rtc->rtc_mon = ds1687_read(sc, RTC_MONTH);
rtc->rtc_year = ds1687_read(sc, RTC_YEAR);
ds1687_bank_select(sc, 1);
rtc->rtc_cen = ds1687_read(sc, RTC_CENTURY);
ds1687_bank_select(sc, 0);
return(1);
}
/* device and attach structures */
struct cfattach ds1687rtc_ca = {
sizeof(struct dsrtc_softc), dsrtcmatch, dsrtcattach
};
struct cfdriver ds1687rtc_cd = {
NULL, "dsrtc", DV_DULL
};
/*
* dsrtcmatch()
*
* Validate the IIC address to make sure its an RTC we understand
*/
int
dsrtcmatch(parent, cf, aux)
struct device *parent;
void *cf;
void *aux;
{
struct isa_attach_args *ia = aux;
#ifdef __NetBSD__
if (ia->ia_nio < 1 ||
ia->ia_iobase == -1)
return (0);
ia->ia_nio = 1;
ia->ia_io[0].ir_size = NRTC_PORTS;
#else
ia->ia_iosize = NRTC_PORTS;
#endif
#if 0
ia->ia_niomem = 0;
ia->ia_nirq = 0;
ia->ia_ndrq = 0;
#endif
return(1);
}
/*
* dsrtcattach()
*
* Attach the rtc device
*/
void
dsrtcattach(parent, self, aux)
struct device *parent;
struct device *self;
void *aux;
{
struct dsrtc_softc *sc = (struct dsrtc_softc *)self;
struct isa_attach_args *ia = aux;
struct todclock_attach_args ta;
sc->sc_iot = ia->ia_iot;
if (bus_space_map(sc->sc_iot, ia->ia_iobase,
ia->ia_iosize, 0, &sc->sc_ioh)) {
printf(": cannot map I/O space\n");
return;
}
ds1687_write(sc, RTC_REG_A, RTC_REG_A_DV1);
ds1687_write(sc, RTC_REG_B, RTC_REG_B_BINARY | RTC_REG_B_24_HOUR);
if (!(ds1687_read(sc, RTC_REG_D) & RTC_REG_D_VRT))
printf(": lithium cell is dead, RTC unreliable");
printf("\n");
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);
}
/* End of dsrtc.c */
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