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From fce981438497199217ed19f14c4d0f1a1aa309f3 Mon Sep 17 00:00:00 2001
From: =?utf-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= <arve@google.com>
Date: Fri, 29 Jun 2007 21:46:31 -0700
Subject: [PATCH 127/134] [ARM] goldfish: RTC: Add RTC driver for goldfish.
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 8bit
Gets the current time from the host.
Alarms are not supported yet.
Signed-off-by: Mike A. Chan <mikechan@google.com>
Signed-off-by: Arve Hjønnevåg <arve@android.com>
---
drivers/rtc/Kconfig | 6 ++
drivers/rtc/Makefile | 1 +
drivers/rtc/rtc-goldfish.c | 138 ++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 145 insertions(+), 0 deletions(-)
create mode 100644 drivers/rtc/rtc-goldfish.c
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -691,6 +691,12 @@ config RTC_DRV_BFIN
This driver can also be built as a module. If so, the module
will be called rtc-bfin.
+config RTC_DRV_GOLDFISH
+ tristate "GOLDFISH"
+ depends on ARCH_GOLDFISH
+ help
+ RTC driver for Goldfish Virtual Platform
+
config RTC_DRV_RS5C313
tristate "Ricoh RS5C313"
depends on SH_LANDISK
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -39,6 +39,7 @@ obj-$(CONFIG_RTC_DRV_DS3234) += rtc-ds32
obj-$(CONFIG_RTC_DRV_EFI) += rtc-efi.o
obj-$(CONFIG_RTC_DRV_EP93XX) += rtc-ep93xx.o
obj-$(CONFIG_RTC_DRV_FM3130) += rtc-fm3130.o
+obj-$(CONFIG_RTC_DRV_GOLDFISH) += rtc-goldfish.o
obj-$(CONFIG_RTC_DRV_ISL1208) += rtc-isl1208.o
obj-$(CONFIG_RTC_DRV_M41T80) += rtc-m41t80.o
obj-$(CONFIG_RTC_DRV_M41T94) += rtc-m41t94.o
--- /dev/null
+++ b/drivers/rtc/rtc-goldfish.c
@@ -0,0 +1,138 @@
+/* drivers/rtc/rtc-goldfish.c
+**
+** Copyright (C) 2007 Google, Inc.
+**
+** This software is licensed under the terms of the GNU General Public
+** License version 2, as published by the Free Software Foundation, and
+** may be copied, distributed, and modified under those terms.
+**
+** 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.
+**
+*/
+
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/platform_device.h>
+#include <linux/rtc.h>
+
+#include <mach/timer.h>
+#include <mach/hardware.h>
+#include <asm/io.h>
+
+struct goldfish_rtc {
+ uint32_t base;
+ uint32_t irq;
+ struct rtc_device *rtc;
+};
+
+static irqreturn_t
+goldfish_rtc_interrupt(int irq, void *dev_id)
+{
+ struct goldfish_rtc *qrtc = dev_id;
+ unsigned long events = 0;
+
+ writel(1, qrtc->base + TIMER_CLEAR_INTERRUPT);
+ events = RTC_IRQF | RTC_AF;
+
+ rtc_update_irq(qrtc->rtc, 1, events);
+
+ return IRQ_HANDLED;
+}
+
+static int goldfish_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+ int64_t time;
+ struct goldfish_rtc *qrtc = platform_get_drvdata(to_platform_device(dev));
+
+ time = readl(qrtc->base + TIMER_TIME_LOW);
+ time |= (int64_t)readl(qrtc->base + TIMER_TIME_HIGH) << 32;
+ do_div(time, NSEC_PER_SEC);
+
+ rtc_time_to_tm(time, tm);
+ return 0;
+}
+
+static struct rtc_class_ops goldfish_rtc_ops = {
+// .ioctl = goldfish_rtc_ioctl,
+ .read_time = goldfish_rtc_read_time,
+// .set_time = goldfish_rtc_set_time,
+// .read_alarm = goldfish_rtc_read_alarm,
+// .set_alarm = goldfish_rtc_set_alarm,
+};
+
+
+static int goldfish_rtc_probe(struct platform_device *pdev)
+{
+ int ret;
+ struct resource *r;
+ struct goldfish_rtc *qrtc;
+
+ qrtc = kzalloc(sizeof(*qrtc), GFP_KERNEL);
+ if(qrtc == NULL) {
+ ret = -ENOMEM;
+ goto err_qrtc_alloc_failed;
+ }
+ platform_set_drvdata(pdev, qrtc);
+
+ r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if(r == NULL) {
+ ret = -ENODEV;
+ goto err_no_io_base;
+ }
+ qrtc->base = IO_ADDRESS(r->start - IO_START);
+ qrtc->irq = platform_get_irq(pdev, 0);
+ if(qrtc->irq < 0) {
+ ret = -ENODEV;
+ goto err_no_irq;
+ }
+ qrtc->rtc = rtc_device_register(pdev->name, &pdev->dev,
+ &goldfish_rtc_ops, THIS_MODULE);
+ if (IS_ERR(qrtc->rtc)) {
+ ret = PTR_ERR(qrtc->rtc);
+ goto err_rtc_device_register_failed;
+ }
+
+ ret = request_irq(qrtc->irq, goldfish_rtc_interrupt, 0, pdev->name, qrtc);
+ if(ret)
+ goto request_irq;
+
+ return 0;
+
+ free_irq(qrtc->irq, qrtc);
+request_irq:
+ rtc_device_unregister(qrtc->rtc);
+err_rtc_device_register_failed:
+err_no_irq:
+err_no_io_base:
+ kfree(qrtc);
+err_qrtc_alloc_failed:
+ return ret;
+}
+
+static int goldfish_rtc_remove(struct platform_device *pdev)
+{
+ struct goldfish_rtc *qrtc = platform_get_drvdata(pdev);
+ free_irq(qrtc->irq, qrtc);
+ rtc_device_unregister(qrtc->rtc);
+ kfree(qrtc);
+ return 0;
+}
+
+static struct platform_driver goldfish_timer = {
+ .probe = goldfish_rtc_probe,
+ .remove = goldfish_rtc_remove,
+ .driver = {
+ .name = "goldfish_rtc"
+ }
+};
+
+static int __init goldfish_rtc_init(void)
+{
+ return platform_driver_register(&goldfish_timer);
+}
+
+module_init(goldfish_rtc_init);
+
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