9 files changed, 284 insertions, 36 deletions

diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 4949dc4859be..fc85bf2e4a97 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -469,6 +469,16 @@ config RTC_DRV_VR41XX
           To compile this driver as a module, choose M here: the
           module will be called rtc-vr41xx.
 
+config RTC_DRV_PL030
+        tristate "ARM AMBA PL030 RTC"
+        depends on ARM_AMBA
+        help
+          If you say Y here you will get access to ARM AMBA
+          PrimeCell PL030 RTC found on certain ARM SOCs.
+
+          To compile this driver as a module, choose M here: the
+          module will be called rtc-pl030.
+
 config RTC_DRV_PL031
         tristate "ARM AMBA PL031 RTC"
         depends on ARM_AMBA
@@ -495,12 +505,13 @@ config RTC_DRV_AT91RM9200
           this is powered by the backup power supply.
 
 config RTC_DRV_AT91SAM9
-        tristate "AT91SAM9x"
+        tristate "AT91SAM9x/AT91CAP9"
         depends on ARCH_AT91 && !(ARCH_AT91RM9200 || ARCH_AT91X40)
         help
-          RTC driver for the Atmel AT91SAM9x internal RTT (Real Time Timer).
-          These timers are powered by the backup power supply (such as a
-          small coin cell battery), but do not need to be used as RTCs.
+          RTC driver for the Atmel AT91SAM9x and AT91CAP9 internal RTT
+          (Real Time Timer). These timers are powered by the backup power
+          supply (such as a small coin cell battery), but do not need to
+          be used as RTCs.
 
           (On AT91SAM9rl chips you probably want to use the dedicated RTC
           module and leave the RTT available for other uses.)
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index b6e14d51670b..b5d9d67df887 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -41,6 +41,7 @@ obj-$(CONFIG_RTC_DRV_MAX6902)	+= rtc-max6902.o
 obj-$(CONFIG_RTC_DRV_OMAP)      += rtc-omap.o
 obj-$(CONFIG_RTC_DRV_PCF8563)   += rtc-pcf8563.o
 obj-$(CONFIG_RTC_DRV_PCF8583)   += rtc-pcf8583.o
+obj-$(CONFIG_RTC_DRV_PL030)     += rtc-pl030.o
 obj-$(CONFIG_RTC_DRV_PL031)     += rtc-pl031.o
 obj-$(CONFIG_RTC_DRV_PPC)       += rtc-ppc.o
 obj-$(CONFIG_RTC_DRV_R9701)     += rtc-r9701.o
diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c
index 39e64ab1ecb7..9c3db934cc24 100644
--- a/drivers/rtc/rtc-at91rm9200.c
+++ b/drivers/rtc/rtc-at91rm9200.c
@@ -29,10 +29,6 @@
 #include <linux/completion.h>
 
 #include <asm/uaccess.h>
-#include <asm/rtc.h>
-
-#include <asm/mach/time.h>
-
 #include <asm/arch/at91_rtc.h>
 
 
diff --git a/drivers/rtc/rtc-at91sam9.c b/drivers/rtc/rtc-at91sam9.c
index 38d8742a4bdf..f0246ef413a4 100644
--- a/drivers/rtc/rtc-at91sam9.c
+++ b/drivers/rtc/rtc-at91sam9.c
@@ -19,7 +19,6 @@
 #include <linux/interrupt.h>
 #include <linux/ioctl.h>
 
-#include <asm/mach/time.h>
 #include <asm/arch/board.h>
 #include <asm/arch/at91_rtt.h>
 
diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
index 58f81c774943..eb23d8423f42 100644
--- a/drivers/rtc/rtc-omap.c
+++ b/drivers/rtc/rtc-omap.c
@@ -22,7 +22,6 @@
 #include <linux/platform_device.h>
 
 #include <asm/io.h>
-#include <asm/mach/time.h>
 
 
 /* The OMAP1 RTC is a year/month/day/hours/minutes/seconds BCD clock
diff --git a/drivers/rtc/rtc-pl030.c b/drivers/rtc/rtc-pl030.c
new file mode 100644
index 000000000000..8448eeb9d675
--- /dev/null
+++ b/drivers/rtc/rtc-pl030.c
@@ -0,0 +1,217 @@
+/*
+ *  linux/drivers/rtc/rtc-pl030.c
+ *
+ *  Copyright (C) 2000-2001 Deep Blue Solutions Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/module.h>
+#include <linux/rtc.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/amba/bus.h>
+#include <linux/io.h>
+
+#define RTC_DR          (0)
+#define RTC_MR          (4)
+#define RTC_STAT        (8)
+#define RTC_EOI         (8)
+#define RTC_LR          (12)
+#define RTC_CR          (16)
+#define RTC_CR_MIE      (1 << 0)
+
+struct pl030_rtc {
+        struct rtc_device       *rtc;
+        void __iomem            *base;
+};
+
+static irqreturn_t pl030_interrupt(int irq, void *dev_id)
+{
+        struct pl030_rtc *rtc = dev_id;
+        writel(0, rtc->base + RTC_EOI);
+        return IRQ_HANDLED;
+}
+
+static int pl030_open(struct device *dev)
+{
+        return 0;
+}
+
+static void pl030_release(struct device *dev)
+{
+}
+
+static int pl030_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
+{
+        return -ENOIOCTLCMD;
+}
+
+static int pl030_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+        struct pl030_rtc *rtc = dev_get_drvdata(dev);
+
+        rtc_time_to_tm(readl(rtc->base + RTC_MR), &alrm->time);
+        return 0;
+}
+
+static int pl030_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+        struct pl030_rtc *rtc = dev_get_drvdata(dev);
+        unsigned long time;
+        int ret;
+
+        /*
+         * At the moment, we can only deal with non-wildcarded alarm times.
+         */
+        ret = rtc_valid_tm(&alrm->time);
+        if (ret == 0)
+                ret = rtc_tm_to_time(&alrm->time, &time);
+        if (ret == 0)
+                writel(time, rtc->base + RTC_MR);
+        return ret;
+}
+
+static int pl030_read_time(struct device *dev, struct rtc_time *tm)
+{
+        struct pl030_rtc *rtc = dev_get_drvdata(dev);
+
+        rtc_time_to_tm(readl(rtc->base + RTC_DR), tm);
+
+        return 0;
+}
+
+/*
+ * Set the RTC time.  Unfortunately, we can't accurately set
+ * the point at which the counter updates.
+ *
+ * Also, since RTC_LR is transferred to RTC_CR on next rising
+ * edge of the 1Hz clock, we must write the time one second
+ * in advance.
+ */
+static int pl030_set_time(struct device *dev, struct rtc_time *tm)
+{
+        struct pl030_rtc *rtc = dev_get_drvdata(dev);
+        unsigned long time;
+        int ret;
+
+        ret = rtc_tm_to_time(tm, &time);
+        if (ret == 0)
+                writel(time + 1, rtc->base + RTC_LR);
+
+        return ret;
+}
+
+static const struct rtc_class_ops pl030_ops = {
+        .open           = pl030_open,
+        .release        = pl030_release,
+        .ioctl          = pl030_ioctl,
+        .read_time      = pl030_read_time,
+        .set_time       = pl030_set_time,
+        .read_alarm     = pl030_read_alarm,
+        .set_alarm      = pl030_set_alarm,
+};
+
+static int pl030_probe(struct amba_device *dev, void *id)
+{
+        struct pl030_rtc *rtc;
+        int ret;
+
+        ret = amba_request_regions(dev, NULL);
+        if (ret)
+                goto err_req;
+
+        rtc = kmalloc(sizeof(*rtc), GFP_KERNEL);
+        if (!rtc) {
+                ret = -ENOMEM;
+                goto err_rtc;
+        }
+
+        rtc->base = ioremap(dev->res.start, SZ_4K);
+        if (!rtc->base) {
+                ret = -ENOMEM;
+                goto err_map;
+        }
+
+        __raw_writel(0, rtc->base + RTC_CR);
+        __raw_writel(0, rtc->base + RTC_EOI);
+
+        amba_set_drvdata(dev, rtc);
+
+        ret = request_irq(dev->irq[0], pl030_interrupt, IRQF_DISABLED,
+                          "rtc-pl030", rtc);
+        if (ret)
+                goto err_irq;
+
+        rtc->rtc = rtc_device_register("pl030", &dev->dev, &pl030_ops,
+                                       THIS_MODULE);
+        if (IS_ERR(rtc->rtc)) {
+                ret = PTR_ERR(rtc->rtc);
+                goto err_reg;
+        }
+
+        return 0;
+
+ err_reg:
+        free_irq(dev->irq[0], rtc);
+ err_irq:
+        iounmap(rtc->base);
+ err_map:
+        kfree(rtc);
+ err_rtc:
+        amba_release_regions(dev);
+ err_req:
+        return ret;
+}
+
+static int pl030_remove(struct amba_device *dev)
+{
+        struct pl030_rtc *rtc = amba_get_drvdata(dev);
+
+        amba_set_drvdata(dev, NULL);
+
+        writel(0, rtc->base + RTC_CR);
+
+        free_irq(dev->irq[0], rtc);
+        rtc_device_unregister(rtc->rtc);
+        iounmap(rtc->base);
+        kfree(rtc);
+        amba_release_regions(dev);
+
+        return 0;
+}
+
+static struct amba_id pl030_ids[] = {
+        {
+                .id     = 0x00041030,
+                .mask   = 0x000fffff,
+        },
+        { 0, 0 },
+};
+
+static struct amba_driver pl030_driver = {
+        .drv            = {
+                .name   = "rtc-pl030",
+        },
+        .probe          = pl030_probe,
+        .remove         = pl030_remove,
+        .id_table       = pl030_ids,
+};
+
+static int __init pl030_init(void)
+{
+        return amba_driver_register(&pl030_driver);
+}
+
+static void __exit pl030_exit(void)
+{
+        amba_driver_unregister(&pl030_driver);
+}
+
+module_init(pl030_init);
+module_exit(pl030_exit);
+
+MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
+MODULE_DESCRIPTION("ARM AMBA PL030 RTC Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-pl031.c b/drivers/rtc/rtc-pl031.c
index 2fd49edcc712..08b4610ec5a6 100644
--- a/drivers/rtc/rtc-pl031.c
+++ b/drivers/rtc/rtc-pl031.c
@@ -12,23 +12,12 @@
  * as published by the Free Software Foundation; either version
  * 2 of the License, or (at your option) any later version.
  */
-
-#include <linux/platform_device.h>
 #include <linux/module.h>
 #include <linux/rtc.h>
 #include <linux/init.h>
-#include <linux/fs.h>
 #include <linux/interrupt.h>
-#include <linux/string.h>
-#include <linux/pm.h>
-#include <linux/bitops.h>
-
 #include <linux/amba/bus.h>
-
-#include <asm/io.h>
-#include <asm/hardware.h>
-#include <asm/irq.h>
-#include <asm/rtc.h>
+#include <linux/io.h>
 
 /*
  * Register definitions
@@ -142,13 +131,12 @@ static int pl031_remove(struct amba_device *adev)
 {
         struct pl031_local *ldata = dev_get_drvdata(&adev->dev);
 
-        if (ldata) {
-                dev_set_drvdata(&adev->dev, NULL);
-                free_irq(adev->irq[0], ldata->rtc);
-                rtc_device_unregister(ldata->rtc);
-                iounmap(ldata->base);
-                kfree(ldata);
-        }
+        amba_set_drvdata(adev, NULL);
+        free_irq(adev->irq[0], ldata->rtc);
+        rtc_device_unregister(ldata->rtc);
+        iounmap(ldata->base);
+        kfree(ldata);
+        amba_release_regions(adev);
 
         return 0;
 }
@@ -158,13 +146,15 @@ static int pl031_probe(struct amba_device *adev, void *id)
         int ret;
         struct pl031_local *ldata;
 
+        ret = amba_request_regions(adev, NULL);
+        if (ret)
+                goto err_req;
 
         ldata = kmalloc(sizeof(struct pl031_local), GFP_KERNEL);
         if (!ldata) {
                 ret = -ENOMEM;
                 goto out;
         }
-        dev_set_drvdata(&adev->dev, ldata);
 
         ldata->base = ioremap(adev->res.start,
                               adev->res.end - adev->res.start + 1);
@@ -173,6 +163,8 @@ static int pl031_probe(struct amba_device *adev, void *id)
                 goto out_no_remap;
         }
 
+        amba_set_drvdata(adev, ldata);
+
         if (request_irq(adev->irq[0], pl031_interrupt, IRQF_DISABLED,
                         "rtc-pl031", ldata->rtc)) {
                 ret = -EIO;
@@ -192,10 +184,12 @@ out_no_rtc:
         free_irq(adev->irq[0], ldata->rtc);
 out_no_irq:
         iounmap(ldata->base);
+        amba_set_drvdata(adev, NULL);
 out_no_remap:
-        dev_set_drvdata(&adev->dev, NULL);
         kfree(ldata);
 out:
+        amba_release_regions(adev);
+err_req:
         return ret;
 }
 
diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c
index f26e0cad8f16..fed86e507fdf 100644
--- a/drivers/rtc/rtc-s3c.c
+++ b/drivers/rtc/rtc-s3c.c
@@ -26,10 +26,6 @@
 #include <asm/uaccess.h>
 #include <asm/io.h>
 #include <asm/irq.h>
-#include <asm/rtc.h>
-
-#include <asm/mach/time.h>
-
 #include <asm/plat-s3c/regs-rtc.h>
 
 /* I have yet to find an S3C implementation with more than one
diff --git a/drivers/rtc/rtc-sa1100.c b/drivers/rtc/rtc-sa1100.c
index 67421b0d3a7b..f47294c60148 100644
--- a/drivers/rtc/rtc-sa1100.c
+++ b/drivers/rtc/rtc-sa1100.c
@@ -33,7 +33,6 @@
 
 #include <asm/hardware.h>
 #include <asm/irq.h>
-#include <asm/rtc.h>
 
 #ifdef CONFIG_ARCH_PXA
 #include <asm/arch/pxa-regs.h>
@@ -47,6 +46,42 @@ static unsigned long rtc_freq = 1024;
 static struct rtc_time rtc_alarm;
 static DEFINE_SPINLOCK(sa1100_rtc_lock);
 
+static inline int rtc_periodic_alarm(struct rtc_time *tm)
+{
+        return  (tm->tm_year == -1) ||
+                ((unsigned)tm->tm_mon >= 12) ||
+                ((unsigned)(tm->tm_mday - 1) >= 31) ||
+                ((unsigned)tm->tm_hour > 23) ||
+                ((unsigned)tm->tm_min > 59) ||
+                ((unsigned)tm->tm_sec > 59);
+}
+
+/*
+ * Calculate the next alarm time given the requested alarm time mask
+ * and the current time.
+ */
+static void rtc_next_alarm_time(struct rtc_time *next, struct rtc_time *now, struct rtc_time *alrm)
+{
+        unsigned long next_time;
+        unsigned long now_time;
+
+        next->tm_year = now->tm_year;
+        next->tm_mon = now->tm_mon;
+        next->tm_mday = now->tm_mday;
+        next->tm_hour = alrm->tm_hour;
+        next->tm_min = alrm->tm_min;
+        next->tm_sec = alrm->tm_sec;
+
+        rtc_tm_to_time(now, &now_time);
+        rtc_tm_to_time(next, &next_time);
+
+        if (next_time < now_time) {
+                /* Advance one day */
+                next_time += 60 * 60 * 24;
+                rtc_time_to_tm(next_time, next);
+        }
+}
+
 static int rtc_update_alarm(struct rtc_time *alrm)
 {
         struct rtc_time alarm_tm, now_tm;