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