191 lines
4.8 KiB
C
191 lines
4.8 KiB
C
/* $NetBSD: rs5c316_mainbus.c,v 1.1 2010/04/06 15:54:29 nonaka Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2009 NONAKA Kimihiro <nonaka@netbsd.org>
|
|
* 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 REGENTS 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 REGENTS 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: rs5c316_mainbus.c,v 1.1 2010/04/06 15:54:29 nonaka Exp $");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/device.h>
|
|
#include <sys/kernel.h>
|
|
|
|
#include <dev/clock_subr.h>
|
|
#include <dev/ic/rs5c313var.h>
|
|
|
|
#include <machine/autoconf.h>
|
|
|
|
#include <sh3/devreg.h>
|
|
#include <sh3/pfcreg.h>
|
|
|
|
#include <evbsh3/ap_ms104_sh4/ap_ms104_sh4reg.h>
|
|
#include <evbsh3/ap_ms104_sh4/ap_ms104_sh4var.h>
|
|
|
|
/* chip access methods */
|
|
static void rtc_begin(struct rs5c313_softc *);
|
|
static void rtc_ce(struct rs5c313_softc *, int);
|
|
static void rtc_dir(struct rs5c313_softc *, int);
|
|
static void rtc_clk(struct rs5c313_softc *, int);
|
|
static int rtc_read(struct rs5c313_softc *);
|
|
static void rtc_write(struct rs5c313_softc *, int);
|
|
|
|
static struct rs5c313_ops rs5c316_mainbus_ops = {
|
|
.rs5c313_op_begin = rtc_begin,
|
|
.rs5c313_op_ce = rtc_ce,
|
|
.rs5c313_op_clk = rtc_clk,
|
|
.rs5c313_op_dir = rtc_dir,
|
|
.rs5c313_op_read = rtc_read,
|
|
.rs5c313_op_write = rtc_write,
|
|
};
|
|
|
|
/* autoconf glue */
|
|
static int rs5c316_mainbus_match(device_t, cfdata_t, void *);
|
|
static void rs5c316_mainbus_attach(device_t, device_t, void *);
|
|
|
|
CFATTACH_DECL_NEW(rs5c313_mainbus, sizeof(struct rs5c313_softc),
|
|
rs5c316_mainbus_match, rs5c316_mainbus_attach, NULL, NULL);
|
|
|
|
#define ndelay(x) delay(((x) + 999) / 1000)
|
|
|
|
static int
|
|
rs5c316_mainbus_match(device_t parent, cfdata_t cf, void *aux)
|
|
{
|
|
struct mainbus_attach_args *maa = (struct mainbus_attach_args *)aux;
|
|
|
|
if (strcmp(maa->ma_name, "rs5c313rtc") != 0)
|
|
return 0;
|
|
return 1;
|
|
}
|
|
|
|
|
|
static void
|
|
rs5c316_mainbus_attach(device_t parent, device_t self, void *aux)
|
|
{
|
|
struct rs5c313_softc *sc = device_private(self);
|
|
uint32_t reg;
|
|
|
|
sc->sc_dev = self;
|
|
sc->sc_model = MODEL_5C316;
|
|
sc->sc_ops = &rs5c316_mainbus_ops;
|
|
|
|
/* setup gpio pin */
|
|
reg = _reg_read_4(SH4_PCTRA);
|
|
reg &= ~(3 << (GPIO_PIN_RTC_CE * 2));
|
|
reg |= (1 << (GPIO_PIN_RTC_CE * 2)); /* output */
|
|
reg &= ~(3 << (GPIO_PIN_RTC_SCLK * 2));
|
|
reg |= (1 << (GPIO_PIN_RTC_SCLK * 2)); /* output */
|
|
reg &= ~(3 << (GPIO_PIN_RTC_SIO * 2));
|
|
reg |= (1 << (GPIO_PIN_RTC_SIO * 2)); /* output */
|
|
_reg_write_4(SH4_PCTRA, reg);
|
|
|
|
rs5c313_attach(sc);
|
|
}
|
|
|
|
static void
|
|
rtc_begin(struct rs5c313_softc *sc)
|
|
{
|
|
|
|
/* nothing to do */
|
|
}
|
|
|
|
static void
|
|
rtc_ce(struct rs5c313_softc *sc, int onoff)
|
|
{
|
|
uint16_t
|
|
|
|
reg = _reg_read_2(SH4_PDTRA);
|
|
if (onoff) {
|
|
reg |= (1 << GPIO_PIN_RTC_CE);
|
|
} else {
|
|
reg &= ~(1 << GPIO_PIN_RTC_CE);
|
|
}
|
|
_reg_write_2(SH4_PDTRA, reg);
|
|
ndelay(600);
|
|
}
|
|
|
|
static void
|
|
rtc_clk(struct rs5c313_softc *sc, int onoff)
|
|
{
|
|
uint16_t reg;
|
|
|
|
reg = _reg_read_2(SH4_PDTRA);
|
|
if (onoff) {
|
|
reg |= (1 << GPIO_PIN_RTC_SCLK);
|
|
} else {
|
|
reg &= ~(1 << GPIO_PIN_RTC_SCLK);
|
|
}
|
|
_reg_write_2(SH4_PDTRA, reg);
|
|
}
|
|
|
|
static void
|
|
rtc_dir(struct rs5c313_softc *sc, int output)
|
|
{
|
|
uint32_t reg;
|
|
|
|
reg = _reg_read_4(SH4_PCTRA);
|
|
reg &= ~(3 << (GPIO_PIN_RTC_SIO * 2)); /* input */
|
|
if (output) {
|
|
reg |= (1 << (GPIO_PIN_RTC_SIO * 2)); /* output */
|
|
}
|
|
_reg_write_4(SH4_PCTRA, reg);
|
|
}
|
|
|
|
static int
|
|
rtc_read(struct rs5c313_softc *sc)
|
|
{
|
|
int bit;
|
|
|
|
ndelay(300);
|
|
|
|
bit = (_reg_read_2(SH4_PDTRA) & (1 << GPIO_PIN_RTC_SIO)) ? 1 : 0;
|
|
|
|
rtc_clk(sc, 0);
|
|
ndelay(300);
|
|
rtc_clk(sc, 1);
|
|
|
|
return bit;
|
|
}
|
|
|
|
static void
|
|
rtc_write(struct rs5c313_softc *sc, int bit)
|
|
{
|
|
uint16_t reg;
|
|
|
|
reg = _reg_read_2(SH4_PDTRA);
|
|
if (bit)
|
|
reg |= (1 << GPIO_PIN_RTC_SIO);
|
|
else
|
|
reg &= ~(1 << GPIO_PIN_RTC_SIO);
|
|
_reg_write_2(SH4_PDTRA, reg);
|
|
|
|
ndelay(300);
|
|
|
|
rtc_clk(sc, 0);
|
|
ndelay(300);
|
|
rtc_clk(sc, 1);
|
|
}
|