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path: root/drivers/rtc/rtc-vr41xx.c
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Diffstat (limited to 'drivers/rtc/rtc-vr41xx.c')
-rw-r--r--drivers/rtc/rtc-vr41xx.c283
1 files changed, 101 insertions, 182 deletions
diff --git a/drivers/rtc/rtc-vr41xx.c b/drivers/rtc/rtc-vr41xx.c
index 596764fd29f..88c9c92e89f 100644
--- a/drivers/rtc/rtc-vr41xx.c
+++ b/drivers/rtc/rtc-vr41xx.c
@@ -1,7 +1,7 @@
/*
* Driver for NEC VR4100 series Real Time Clock unit.
*
- * Copyright (C) 2003-2006 Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
+ * Copyright (C) 2003-2008 Yoichi Yuasa <yuasa@linux-mips.org>
*
* 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
@@ -17,37 +17,25 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
+#include <linux/err.h>
#include <linux/fs.h>
#include <linux/init.h>
+#include <linux/io.h>
#include <linux/ioport.h>
-#include <linux/irq.h>
+#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/rtc.h>
#include <linux/spinlock.h>
#include <linux/types.h>
+#include <linux/uaccess.h>
+#include <linux/log2.h>
#include <asm/div64.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
-#include <asm/vr41xx/irq.h>
-MODULE_AUTHOR("Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>");
+MODULE_AUTHOR("Yoichi Yuasa <yuasa@linux-mips.org>");
MODULE_DESCRIPTION("NEC VR4100 series RTC driver");
-MODULE_LICENSE("GPL");
-
-#define RTC1_TYPE1_START 0x0b0000c0UL
-#define RTC1_TYPE1_END 0x0b0000dfUL
-#define RTC2_TYPE1_START 0x0b0001c0UL
-#define RTC2_TYPE1_END 0x0b0001dfUL
-
-#define RTC1_TYPE2_START 0x0f000100UL
-#define RTC1_TYPE2_END 0x0f00011fUL
-#define RTC2_TYPE2_START 0x0f000120UL
-#define RTC2_TYPE2_END 0x0f00013fUL
-
-#define RTC1_SIZE 0x20
-#define RTC2_SIZE 0x20
+MODULE_LICENSE("GPL v2");
/* RTC 1 registers */
#define ETIMELREG 0x00
@@ -95,15 +83,10 @@ static unsigned long epoch = 1970; /* Jan 1 1970 00:00:00 */
static DEFINE_SPINLOCK(rtc_lock);
static char rtc_name[] = "RTC";
-static unsigned long periodic_frequency;
static unsigned long periodic_count;
-
-struct resource rtc_resource[2] = {
- { .name = rtc_name,
- .flags = IORESOURCE_MEM, },
- { .name = rtc_name,
- .flags = IORESOURCE_MEM, },
-};
+static unsigned int alarm_enabled;
+static int aie_irq;
+static int pie_irq;
static inline unsigned long read_elapsed_second(void)
{
@@ -120,7 +103,7 @@ static inline unsigned long read_elapsed_second(void)
second_mid = rtc1_read(ETIMEMREG);
second_high = rtc1_read(ETIMEHREG);
} while (first_low != second_low || first_mid != second_mid ||
- first_high != second_high);
+ first_high != second_high);
return (first_high << 17) | (first_mid << 1) | (first_low >> 15);
}
@@ -149,8 +132,8 @@ static void vr41xx_rtc_release(struct device *dev)
spin_unlock_irq(&rtc_lock);
- disable_irq(ELAPSEDTIME_IRQ);
- disable_irq(RTCLONG1_IRQ);
+ disable_irq(aie_irq);
+ disable_irq(pie_irq);
}
static int vr41xx_rtc_read_time(struct device *dev, struct rtc_time *time)
@@ -171,7 +154,7 @@ static int vr41xx_rtc_set_time(struct device *dev, struct rtc_time *time)
epoch_sec = mktime(epoch, 1, 1, 0, 0, 0);
current_sec = mktime(time->tm_year + 1900, time->tm_mon + 1, time->tm_mday,
- time->tm_hour, time->tm_min, time->tm_sec);
+ time->tm_hour, time->tm_min, time->tm_sec);
write_elapsed_second(current_sec - epoch_sec);
@@ -188,6 +171,7 @@ static int vr41xx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *wkalrm)
low = rtc1_read(ECMPLREG);
mid = rtc1_read(ECMPMREG);
high = rtc1_read(ECMPHREG);
+ wkalrm->enabled = alarm_enabled;
spin_unlock_irq(&rtc_lock);
@@ -202,14 +186,22 @@ static int vr41xx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *wkalrm)
struct rtc_time *time = &wkalrm->time;
alarm_sec = mktime(time->tm_year + 1900, time->tm_mon + 1, time->tm_mday,
- time->tm_hour, time->tm_min, time->tm_sec);
+ time->tm_hour, time->tm_min, time->tm_sec);
spin_lock_irq(&rtc_lock);
+ if (alarm_enabled)
+ disable_irq(aie_irq);
+
rtc1_write(ECMPLREG, (uint16_t)(alarm_sec << 15));
rtc1_write(ECMPMREG, (uint16_t)(alarm_sec >> 1));
rtc1_write(ECMPHREG, (uint16_t)(alarm_sec >> 17));
+ if (wkalrm->enabled)
+ enable_irq(aie_irq);
+
+ alarm_enabled = wkalrm->enabled;
+
spin_unlock_irq(&rtc_lock);
return 0;
@@ -217,42 +209,7 @@ static int vr41xx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *wkalrm)
static int vr41xx_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
{
- unsigned long count;
-
switch (cmd) {
- case RTC_AIE_ON:
- enable_irq(ELAPSEDTIME_IRQ);
- break;
- case RTC_AIE_OFF:
- disable_irq(ELAPSEDTIME_IRQ);
- break;
- case RTC_PIE_ON:
- enable_irq(RTCLONG1_IRQ);
- break;
- case RTC_PIE_OFF:
- disable_irq(RTCLONG1_IRQ);
- break;
- case RTC_IRQP_READ:
- return put_user(periodic_frequency, (unsigned long __user *)arg);
- break;
- case RTC_IRQP_SET:
- if (arg > MAX_PERIODIC_RATE)
- return -EINVAL;
-
- periodic_frequency = arg;
-
- count = RTC_FREQUENCY;
- do_div(count, arg);
-
- periodic_count = count;
-
- spin_lock_irq(&rtc_lock);
-
- rtc1_write(RTCL1LREG, count);
- rtc1_write(RTCL1HREG, count >> 16);
-
- spin_unlock_irq(&rtc_lock);
- break;
case RTC_EPOCH_READ:
return put_user(epoch, (unsigned long __user *)arg);
case RTC_EPOCH_SET:
@@ -268,19 +225,37 @@ static int vr41xx_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long
return 0;
}
-static irqreturn_t elapsedtime_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+static int vr41xx_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
+{
+ spin_lock_irq(&rtc_lock);
+ if (enabled) {
+ if (!alarm_enabled) {
+ enable_irq(aie_irq);
+ alarm_enabled = 1;
+ }
+ } else {
+ if (alarm_enabled) {
+ disable_irq(aie_irq);
+ alarm_enabled = 0;
+ }
+ }
+ spin_unlock_irq(&rtc_lock);
+ return 0;
+}
+
+static irqreturn_t elapsedtime_interrupt(int irq, void *dev_id)
{
struct platform_device *pdev = (struct platform_device *)dev_id;
struct rtc_device *rtc = platform_get_drvdata(pdev);
rtc2_write(RTCINTREG, ELAPSEDTIME_INT);
- rtc_update_irq(&rtc->class_dev, 1, RTC_AF);
+ rtc_update_irq(rtc, 1, RTC_AF);
return IRQ_HANDLED;
}
-static irqreturn_t rtclong1_interrupt(int irq, void *dev_id, struct pt_regs *regs)
+static irqreturn_t rtclong1_interrupt(int irq, void *dev_id)
{
struct platform_device *pdev = (struct platform_device *)dev_id;
struct rtc_device *rtc = platform_get_drvdata(pdev);
@@ -291,12 +266,12 @@ static irqreturn_t rtclong1_interrupt(int irq, void *dev_id, struct pt_regs *reg
rtc1_write(RTCL1LREG, count);
rtc1_write(RTCL1HREG, count >> 16);
- rtc_update_irq(&rtc->class_dev, 1, RTC_PF);
+ rtc_update_irq(rtc, 1, RTC_PF);
return IRQ_HANDLED;
}
-static struct rtc_class_ops vr41xx_rtc_ops = {
+static const struct rtc_class_ops vr41xx_rtc_ops = {
.release = vr41xx_rtc_release,
.ioctl = vr41xx_rtc_ioctl,
.read_time = vr41xx_rtc_read_time,
@@ -305,35 +280,44 @@ static struct rtc_class_ops vr41xx_rtc_ops = {
.set_alarm = vr41xx_rtc_set_alarm,
};
-static int __devinit rtc_probe(struct platform_device *pdev)
+static int rtc_probe(struct platform_device *pdev)
{
+ struct resource *res;
struct rtc_device *rtc;
- unsigned int irq;
int retval;
- if (pdev->num_resources != 2)
+ if (pdev->num_resources != 4)
return -EBUSY;
- rtc1_base = ioremap(pdev->resource[0].start, RTC1_SIZE);
- if (rtc1_base == NULL)
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res)
return -EBUSY;
- rtc2_base = ioremap(pdev->resource[1].start, RTC2_SIZE);
- if (rtc2_base == NULL) {
- iounmap(rtc1_base);
- rtc1_base = NULL;
+ rtc1_base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
+ if (!rtc1_base)
return -EBUSY;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+ if (!res) {
+ retval = -EBUSY;
+ goto err_rtc1_iounmap;
+ }
+
+ rtc2_base = devm_ioremap(&pdev->dev, res->start, resource_size(res));
+ if (!rtc2_base) {
+ retval = -EBUSY;
+ goto err_rtc1_iounmap;
}
- rtc = rtc_device_register(rtc_name, &pdev->dev, &vr41xx_rtc_ops, THIS_MODULE);
+ rtc = devm_rtc_device_register(&pdev->dev, rtc_name, &vr41xx_rtc_ops,
+ THIS_MODULE);
if (IS_ERR(rtc)) {
- iounmap(rtc1_base);
- iounmap(rtc2_base);
- rtc1_base = NULL;
- rtc2_base = NULL;
- return PTR_ERR(rtc);
+ retval = PTR_ERR(rtc);
+ goto err_iounmap_all;
}
+ rtc->max_user_freq = MAX_PERIODIC_RATE;
+
spin_lock_irq(&rtc_lock);
rtc1_write(ECMPLREG, 0);
@@ -344,120 +328,55 @@ static int __devinit rtc_probe(struct platform_device *pdev)
spin_unlock_irq(&rtc_lock);
- irq = ELAPSEDTIME_IRQ;
- retval = request_irq(irq, elapsedtime_interrupt, IRQF_DISABLED,
- "elapsed_time", pdev);
- if (retval == 0) {
- irq = RTCLONG1_IRQ;
- retval = request_irq(irq, rtclong1_interrupt, IRQF_DISABLED,
- "rtclong1", pdev);
+ aie_irq = platform_get_irq(pdev, 0);
+ if (aie_irq <= 0) {
+ retval = -EBUSY;
+ goto err_iounmap_all;
}
- if (retval < 0) {
- printk(KERN_ERR "rtc: IRQ%d is busy\n", irq);
- rtc_device_unregister(rtc);
- if (irq == RTCLONG1_IRQ)
- free_irq(ELAPSEDTIME_IRQ, NULL);
- iounmap(rtc1_base);
- iounmap(rtc2_base);
- rtc1_base = NULL;
- rtc2_base = NULL;
- return retval;
+ retval = devm_request_irq(&pdev->dev, aie_irq, elapsedtime_interrupt, 0,
+ "elapsed_time", pdev);
+ if (retval < 0)
+ goto err_iounmap_all;
+
+ pie_irq = platform_get_irq(pdev, 1);
+ if (pie_irq <= 0) {
+ retval = -EBUSY;
+ goto err_iounmap_all;
}
+ retval = devm_request_irq(&pdev->dev, pie_irq, rtclong1_interrupt, 0,
+ "rtclong1", pdev);
+ if (retval < 0)
+ goto err_iounmap_all;
+
platform_set_drvdata(pdev, rtc);
- disable_irq(ELAPSEDTIME_IRQ);
- disable_irq(RTCLONG1_IRQ);
+ disable_irq(aie_irq);
+ disable_irq(pie_irq);
- printk(KERN_INFO "rtc: Real Time Clock of NEC VR4100 series\n");
+ dev_info(&pdev->dev, "Real Time Clock of NEC VR4100 series\n");
return 0;
-}
-
-static int __devexit rtc_remove(struct platform_device *pdev)
-{
- struct rtc_device *rtc;
-
- rtc = platform_get_drvdata(pdev);
- if (rtc != NULL)
- rtc_device_unregister(rtc);
- platform_set_drvdata(pdev, NULL);
+err_iounmap_all:
+ rtc2_base = NULL;
- free_irq(ELAPSEDTIME_IRQ, NULL);
- free_irq(RTCLONG1_IRQ, NULL);
- if (rtc1_base != NULL)
- iounmap(rtc1_base);
- if (rtc2_base != NULL)
- iounmap(rtc2_base);
+err_rtc1_iounmap:
+ rtc1_base = NULL;
- return 0;
+ return retval;
}
-static struct platform_device *rtc_platform_device;
+/* work with hotplug and coldplug */
+MODULE_ALIAS("platform:RTC");
static struct platform_driver rtc_platform_driver = {
.probe = rtc_probe,
- .remove = __devexit_p(rtc_remove),
.driver = {
.name = rtc_name,
.owner = THIS_MODULE,
},
};
-static int __init vr41xx_rtc_init(void)
-{
- int retval;
-
- switch (current_cpu_data.cputype) {
- case CPU_VR4111:
- case CPU_VR4121:
- rtc_resource[0].start = RTC1_TYPE1_START;
- rtc_resource[0].end = RTC1_TYPE1_END;
- rtc_resource[1].start = RTC2_TYPE1_START;
- rtc_resource[1].end = RTC2_TYPE1_END;
- break;
- case CPU_VR4122:
- case CPU_VR4131:
- case CPU_VR4133:
- rtc_resource[0].start = RTC1_TYPE2_START;
- rtc_resource[0].end = RTC1_TYPE2_END;
- rtc_resource[1].start = RTC2_TYPE2_START;
- rtc_resource[1].end = RTC2_TYPE2_END;
- break;
- default:
- return -ENODEV;
- break;
- }
-
- rtc_platform_device = platform_device_alloc("RTC", -1);
- if (rtc_platform_device == NULL)
- return -ENOMEM;
-
- retval = platform_device_add_resources(rtc_platform_device,
- rtc_resource, ARRAY_SIZE(rtc_resource));
-
- if (retval == 0)
- retval = platform_device_add(rtc_platform_device);
-
- if (retval < 0) {
- platform_device_put(rtc_platform_device);
- return retval;
- }
-
- retval = platform_driver_register(&rtc_platform_driver);
- if (retval < 0)
- platform_device_unregister(rtc_platform_device);
-
- return retval;
-}
-
-static void __exit vr41xx_rtc_exit(void)
-{
- platform_driver_unregister(&rtc_platform_driver);
- platform_device_unregister(rtc_platform_device);
-}
-
-module_init(vr41xx_rtc_init);
-module_exit(vr41xx_rtc_exit);
+module_platform_driver(rtc_platform_driver);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-07 17:52:22 +0000