Author: andrew
Date: Thu Jul 22 23:23:39 2010
New Revision: 210397
URL: http://svn.freebsd.org/changeset/base/210397
Log:
Add the s3c24x0 real time clock driver
Approved by: imp (mentor)
Added:
head/sys/arm/s3c2xx0/s3c24x0_rtc.c (contents, props changed)
Modified:
head/sys/arm/s3c2xx0/files.s3c2xx0
head/sys/arm/s3c2xx0/s3c24x0.c
head/sys/arm/s3c2xx0/s3c24x0reg.h
Modified: head/sys/arm/s3c2xx0/files.s3c2xx0
==============================================================================
--- head/sys/arm/s3c2xx0/files.s3c2xx0 Thu Jul 22 23:12:19 2010
(r210396)
+++ head/sys/arm/s3c2xx0/files.s3c2xx0 Thu Jul 22 23:23:39 2010
(r210397)
@@ -2,6 +2,7 @@
arm/arm/cpufunc_asm_arm9.S standard
arm/arm/irq_dispatch.S standard
arm/s3c2xx0/board_ln2410sbc.c optional board_ln2410sbc
+arm/s3c2xx0/s3c24x0_rtc.c standard
arm/s3c2xx0/s3c24x0_machdep.c standard
arm/s3c2xx0/s3c24x0.c standard
arm/s3c2xx0/s3c2xx0_space.c standard
Modified: head/sys/arm/s3c2xx0/s3c24x0.c
==============================================================================
--- head/sys/arm/s3c2xx0/s3c24x0.c Thu Jul 22 23:12:19 2010
(r210396)
+++ head/sys/arm/s3c2xx0/s3c24x0.c Thu Jul 22 23:23:39 2010
(r210397)
@@ -80,6 +80,10 @@ static struct {
u_long count;
} res[2];
} s3c24x0_children[] = {
+ { "rtc", 0, -1, {
+ { SYS_RES_IOPORT, S3C24X0_RTC_PA_BASE, S3C24X0_RTC_SIZE },
+ { 0 },
+ } },
{ "timer", 0, -1, { { 0 }, } },
{ "uart", 1, 0, {
{ SYS_RES_IRQ, S3C24X0_INT_UART0, 1 },
Added: head/sys/arm/s3c2xx0/s3c24x0_rtc.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/arm/s3c2xx0/s3c24x0_rtc.c Thu Jul 22 23:23:39 2010
(r210397)
@@ -0,0 +1,162 @@
+/*
+ * Copyright (C) 2010 Andrew Turner
+ * 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 AUTHOR 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 AUTHOR 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>
+__FBSDID("$FreeBSD$");
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/time.h>
+#include <sys/clock.h>
+#include <sys/resource.h>
+#include <sys/systm.h>
+#include <sys/rman.h>
+#include <sys/kernel.h>
+#include <sys/module.h>
+
+#include <machine/bus.h>
+
+#include <arm/s3c2xx0/s3c24x0reg.h>
+
+#include "clock_if.h"
+
+#define YEAR_BASE 2000
+
+struct s3c2xx0_rtc_softc {
+ struct resource *mem_res;
+};
+
+static int
+s3c2xx0_rtc_probe(device_t dev)
+{
+
+ device_set_desc(dev, "Samsung Integrated RTC");
+ return (0);
+}
+
+static int
+s3c2xx0_rtc_attach(device_t dev)
+{
+ struct s3c2xx0_rtc_softc *sc;
+ int error, rid;
+
+ sc = device_get_softc(dev);
+ error = 0;
+
+ rid = 0;
+ sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, &rid,
+ RF_ACTIVE);
+ if (sc->mem_res == NULL) {
+ error = ENOMEM;
+ goto out;
+ }
+
+ bus_write_1(sc->mem_res, RTC_RTCCON, RTCCON_RTCEN);
+ clock_register(dev, 1000000);
+
+out:
+ return (error);
+}
+
+static int
+s3c2xx0_rtc_gettime(device_t dev, struct timespec *ts)
+{
+ struct s3c2xx0_rtc_softc *sc;
+ struct clocktime ct;
+
+#define READ_TIME() do { \
+ ct.year = YEAR_BASE + FROMBCD(bus_read_1(sc->mem_res, RTC_BCDYEAR)); \
+ ct.mon = FROMBCD(bus_read_1(sc->mem_res, RTC_BCDMON)); \
+ ct.dow = FROMBCD(bus_read_1(sc->mem_res, RTC_BCDDAY)); \
+ ct.day = FROMBCD(bus_read_1(sc->mem_res, RTC_BCDDATE)); \
+ ct.hour = FROMBCD(bus_read_1(sc->mem_res, RTC_BCDHOUR)); \
+ ct.min = FROMBCD(bus_read_1(sc->mem_res, RTC_BCDMIN)); \
+ ct.sec = FROMBCD(bus_read_1(sc->mem_res, RTC_BCDSEC)); \
+} while (0)
+
+ sc = device_get_softc(dev);
+
+ ct.nsec = 0;
+ READ_TIME();
+ /*
+ * Check if we could have read incorrect values
+ * as the values could have changed.
+ */
+ if (ct.sec == 0) {
+ READ_TIME();
+ }
+
+ ct.dow = -1;
+
+#undef READ_TIME
+ return (clock_ct_to_ts(&ct, ts));
+}
+
+static int
+s3c2xx0_rtc_settime(device_t dev, struct timespec *ts)
+{
+ struct s3c2xx0_rtc_softc *sc;
+ struct clocktime ct;
+
+ sc = device_get_softc(dev);
+
+ /* Resolution: 1 sec */
+ if (ts->tv_nsec >= 500000000)
+ ts->tv_sec++;
+ ts->tv_nsec = 0;
+ clock_ts_to_ct(ts, &ct);
+
+ bus_write_1(sc->mem_res, RTC_BCDSEC, TOBCD(ct.sec));
+ bus_write_1(sc->mem_res, RTC_BCDMIN, TOBCD(ct.min));
+ bus_write_1(sc->mem_res, RTC_BCDHOUR, TOBCD(ct.hour));
+ bus_write_1(sc->mem_res, RTC_BCDDATE, TOBCD(ct.day));
+ bus_write_1(sc->mem_res, RTC_BCDDAY, TOBCD(ct.dow));
+ bus_write_1(sc->mem_res, RTC_BCDMON, TOBCD(ct.mon));
+ bus_write_1(sc->mem_res, RTC_BCDYEAR, TOBCD(ct.year - YEAR_BASE));
+
+ return (0);
+}
+
+static device_method_t s3c2xx0_rtc_methods[] = {
+ DEVMETHOD(device_probe, s3c2xx0_rtc_probe),
+ DEVMETHOD(device_attach, s3c2xx0_rtc_attach),
+
+ DEVMETHOD(clock_gettime, s3c2xx0_rtc_gettime),
+ DEVMETHOD(clock_settime, s3c2xx0_rtc_settime),
+
+ { 0, 0 },
+};
+
+static driver_t s3c2xx0_rtc_driver = {
+ "rtc",
+ s3c2xx0_rtc_methods,
+ sizeof(struct s3c2xx0_rtc_softc),
+};
+static devclass_t s3c2xx0_rtc_devclass;
+
+DRIVER_MODULE(s3c2xx0_rtc, s3c24x0, s3c2xx0_rtc_driver, s3c2xx0_rtc_devclass,
+ 0, 0);
+
Modified: head/sys/arm/s3c2xx0/s3c24x0reg.h
==============================================================================
--- head/sys/arm/s3c2xx0/s3c24x0reg.h Thu Jul 22 23:12:19 2010
(r210396)
+++ head/sys/arm/s3c2xx0/s3c24x0reg.h Thu Jul 22 23:23:39 2010
(r210397)
@@ -99,6 +99,9 @@
#define S3C24X0_IIS_BASE
S3C24X0_DEV_PA_TO_VA(S3C24X0_IIS_PA_BASE)
#define S3C24X0_GPIO_PA_BASE 0x56000000
#define S3C24X0_GPIO_BASE
S3C24X0_DEV_PA_TO_VA(S3C24X0_GPIO_PA_BASE)
+#define S3C24X0_RTC_PA_BASE 0x57000000
+#define S3C24X0_RTC_BASE
S3C24X0_DEV_PA_TO_VA(S3C24X0_RTC_PA_BASE)
+#define S3C24X0_RTC_SIZE 0x8C
#define S3C24X0_ADC_PA_BASE 0x58000000
#define S3C24X0_ADC_BASE
S3C24X0_DEV_PA_TO_VA(S3C24X0_ADC_PA_BASE)
#define S3C24X0_SPI0_PA_BASE 0x59000000
@@ -642,7 +645,30 @@
#define ADCDAT_DATAMASK 0x3ff
-/* RTC */ /* XXX */
+/* RTC */
+#define RTC_RTCCON 0x40
+#define RTCCON_RTCEN (1<<0)
+#define RTCCON_CLKSEL (1<<1)
+#define RTCCON_CNTSEL (1<<2)
+#define RTCCON_CLKRST (1<<3)
+#define RTC_TICNT0 0x44
+/* TICNT1 on 2440 */
+#define RTC_RTCALM 0x50
+#define RTC_ALMSEC 0x54
+#define RTC_ALMMIN 0x58
+#define RTC_ALMHOUR 0x5C
+#define RTC_ALMDATE 0x60
+#define RTC_ALMMON 0x64
+#define RTC_ALMYEAR 0x68
+/* RTCRST on 2410 */
+#define RTC_BCDSEC 0x70
+#define RTC_BCDMIN 0x74
+#define RTC_BCDHOUR 0x78
+#define RTC_BCDDATE 0x7C
+#define RTC_BCDDAY 0x80
+#define RTC_BCDMON 0x84
+#define RTC_BCDYEAR 0x88
+
/* SPI */
#define S3C24X0_SPI_SIZE 0x20
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