[PATCH] Create a real RTC driver for PS3, called "rtc-ps3"
From: Geert Uytterhoeven
Date: Tue Feb 24 2009 - 08:04:20 EST
---
arch/powerpc/include/asm/ps3.h | 4 +
arch/powerpc/platforms/ps3/os-area.c | 2 +
arch/powerpc/platforms/ps3/platform.h | 2 -
arch/powerpc/platforms/ps3/setup.c | 2 -
arch/powerpc/platforms/ps3/time.c | 25 ++++----
drivers/rtc/Kconfig | 9 +++
drivers/rtc/Makefile | 1 +
drivers/rtc/rtc-ps3.c | 106 +++++++++++++++++++++++++++++++++
8 files changed, 133 insertions(+), 18 deletions(-)
create mode 100644 drivers/rtc/rtc-ps3.c
diff --git a/arch/powerpc/include/asm/ps3.h b/arch/powerpc/include/asm/ps3.h
index b65446a..dee0480 100644
--- a/arch/powerpc/include/asm/ps3.h
+++ b/arch/powerpc/include/asm/ps3.h
@@ -500,6 +500,10 @@ u64 ps3_get_spe_id(void *arg);
/* mutex synchronizing GPU accesses and video mode changes */
extern struct mutex ps3_gpu_mutex;
+/* os area */
+u64 ps3_os_area_get_rtc_diff(void);
+void ps3_os_area_set_rtc_diff(u64 rtc_diff);
+
/* kernel debug routines */
int ps3_debug_setup_dabr(u64 address, unsigned int dabr_flags);
diff --git a/arch/powerpc/platforms/ps3/os-area.c b/arch/powerpc/platforms/ps3/os-area.c
index ccf0157..f1f2d47 100644
--- a/arch/powerpc/platforms/ps3/os-area.c
+++ b/arch/powerpc/platforms/ps3/os-area.c
@@ -823,6 +823,7 @@ u64 ps3_os_area_get_rtc_diff(void)
{
return saved_params.rtc_diff;
}
+EXPORT_SYMBOL(ps3_os_area_get_rtc_diff);
/**
* ps3_os_area_set_rtc_diff - Set the rtc diff value.
@@ -838,6 +839,7 @@ void ps3_os_area_set_rtc_diff(u64 rtc_diff)
os_area_queue_work();
}
}
+EXPORT_SYMBOL(ps3_os_area_set_rtc_diff);
/**
* ps3_os_area_get_av_multi_out - Returns the default video mode.
diff --git a/arch/powerpc/platforms/ps3/platform.h b/arch/powerpc/platforms/ps3/platform.h
index 235c13e..136aa06 100644
--- a/arch/powerpc/platforms/ps3/platform.h
+++ b/arch/powerpc/platforms/ps3/platform.h
@@ -64,8 +64,6 @@ int ps3_set_rtc_time(struct rtc_time *time);
void __init ps3_os_area_save_params(void);
void __init ps3_os_area_init(void);
-u64 ps3_os_area_get_rtc_diff(void);
-void ps3_os_area_set_rtc_diff(u64 rtc_diff);
/* spu */
diff --git a/arch/powerpc/platforms/ps3/setup.c b/arch/powerpc/platforms/ps3/setup.c
index e2032c6..020ba1d 100644
--- a/arch/powerpc/platforms/ps3/setup.c
+++ b/arch/powerpc/platforms/ps3/setup.c
@@ -300,8 +300,6 @@ define_machine(ps3) {
.init_IRQ = ps3_init_IRQ,
.panic = ps3_panic,
.get_boot_time = ps3_get_boot_time,
- .set_rtc_time = ps3_set_rtc_time,
- .get_rtc_time = ps3_get_rtc_time,
.set_dabr = ps3_set_dabr,
.calibrate_decr = ps3_calibrate_decr,
.progress = ps3_progress,
diff --git a/arch/powerpc/platforms/ps3/time.c b/arch/powerpc/platforms/ps3/time.c
index d0daf7d..112397d 100644
--- a/arch/powerpc/platforms/ps3/time.c
+++ b/arch/powerpc/platforms/ps3/time.c
@@ -19,6 +19,7 @@
*/
#include <linux/kernel.h>
+#include <linux/platform_device.h>
#include <asm/rtc.h>
#include <asm/lv1call.h>
@@ -74,23 +75,19 @@ static u64 read_rtc(void)
return rtc_val;
}
-int ps3_set_rtc_time(struct rtc_time *tm)
+unsigned long __init ps3_get_boot_time(void)
{
- u64 now = mktime(tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
- tm->tm_hour, tm->tm_min, tm->tm_sec);
-
- ps3_os_area_set_rtc_diff(now - read_rtc());
- return 0;
+ return read_rtc() + ps3_os_area_get_rtc_diff();
}
-void ps3_get_rtc_time(struct rtc_time *tm)
-{
- to_tm(read_rtc() + ps3_os_area_get_rtc_diff(), tm);
- tm->tm_year -= 1900;
- tm->tm_mon -= 1;
-}
+static struct platform_device rtc_ps3_dev = {
+ .name = "rtc-ps3",
+ .id = -1,
+};
-unsigned long __init ps3_get_boot_time(void)
+static int __init rtc_init(void)
{
- return read_rtc() + ps3_os_area_get_rtc_diff();
+ return platform_device_register(&rtc_ps3_dev);
}
+
+module_init(rtc_init);
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 81450fb..4b61288 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -736,4 +736,13 @@ config RTC_DRV_MV
This driver can also be built as a module. If so, the module
will be called rtc-mv.
+config RTC_DRV_PS3
+ tristate "PS3 RTC"
+ depends on PPC_PS3
+ help
+ If you say yes here you will get support for the RTC on PS3.
+
+ This driver can also be built as a module. If so, the module
+ will be called rtc-ps3.
+
endif # RTC_CLASS
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 0e697aa..7fe627c 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -76,3 +76,4 @@ obj-$(CONFIG_RTC_DRV_VR41XX) += rtc-vr41xx.o
obj-$(CONFIG_RTC_DRV_WM8350) += rtc-wm8350.o
obj-$(CONFIG_RTC_DRV_X1205) += rtc-x1205.o
obj-$(CONFIG_RTC_DRV_PCF50633) += rtc-pcf50633.o
+obj-$(CONFIG_RTC_DRV_PS3) += rtc-ps3.o
diff --git a/drivers/rtc/rtc-ps3.c b/drivers/rtc/rtc-ps3.c
new file mode 100644
index 0000000..84ae08c
--- /dev/null
+++ b/drivers/rtc/rtc-ps3.c
@@ -0,0 +1,106 @@
+/*
+ * PS3 RTC Driver
+ *
+ * Copyright 2009 Sony Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.
+ * If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/rtc.h>
+
+#include <asm/lv1call.h>
+#include <asm/ps3.h>
+
+
+static u64 read_rtc(void)
+{
+ int result;
+ u64 rtc_val;
+ u64 tb_val;
+
+ result = lv1_get_rtc(&rtc_val, &tb_val);
+ BUG_ON(result);
+
+ return rtc_val;
+}
+
+static int ps3_get_time(struct device *dev, struct rtc_time *tm)
+{
+ to_tm(read_rtc() + ps3_os_area_get_rtc_diff(), tm);
+ tm->tm_year -= 1900;
+ tm->tm_mon -= 1;
+ return 0;
+}
+
+static int ps3_set_time(struct device *dev, struct rtc_time *tm)
+{
+ u64 now = mktime(tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
+ tm->tm_hour, tm->tm_min, tm->tm_sec);
+ ps3_os_area_set_rtc_diff(now - read_rtc());
+ return 0;
+}
+
+static const struct rtc_class_ops ps3_rtc_ops = {
+ .read_time = ps3_get_time,
+ .set_time = ps3_set_time,
+};
+
+static int __devinit ps3_rtc_probe(struct platform_device *dev)
+{
+ struct rtc_device *rtc;
+
+ rtc = rtc_device_register("rtc-ps3", &dev->dev, &ps3_rtc_ops,
+ THIS_MODULE);
+ if (IS_ERR(rtc))
+ return PTR_ERR(rtc);
+
+ platform_set_drvdata(dev, rtc);
+ return 0;
+}
+
+static int __devexit ps3_rtc_remove(struct platform_device *dev)
+{
+ rtc_device_unregister(platform_get_drvdata(dev));
+ return 0;
+}
+
+static struct platform_driver ps3_rtc_driver = {
+ .driver = {
+ .name = "rtc-ps3",
+ .owner = THIS_MODULE,
+ },
+ .probe = ps3_rtc_probe,
+ .remove = __devexit_p(ps3_rtc_remove),
+};
+
+static int __init ps3_rtc_init(void)
+{
+ return platform_driver_register(&ps3_rtc_driver);
+}
+
+static void __exit ps3_rtc_fini(void)
+{
+ platform_driver_unregister(&ps3_rtc_driver);
+}
+
+module_init(ps3_rtc_init);
+module_exit(ps3_rtc_fini);
+
+MODULE_AUTHOR("Sony Corporation");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("ps3 RTC driver");
+MODULE_ALIAS("platform:rtc-ps3");
--
1.6.0.4
With kind regards,
Geert Uytterhoeven
Software Architect
Sony Techsoft Centre Europe
The Corporate Village · Da Vincilaan 7-D1 · B-1935 Zaventem · Belgium
Phone: +32 (0)2 700 8453
Fax: +32 (0)2 700 8622
E-mail: Geert.Uytterhoeven@xxxxxxxxxxx
Internet: http://www.sony-europe.com/
A division of Sony Europe (Belgium) N.V.
VAT BE 0413.825.160 · RPR Brussels
Fortis · BIC GEBABEBB · IBAN BE41293037680010
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