@@ -27,10 +27,17 @@
#define RTC_MONTH_OFFS 8
#define RTC_YEAR_OFFS 16
+#define RTC_ALARM_TIME_REG_OFFS 8
+#define RTC_ALARM_DATE_REG_OFFS 0xc
+#define RTC_ALARM_VALID (1 << 7)
+
+#define RTC_ALARM_INTERRUPT_MASK_REG_OFFS 0x10
+#define RTC_ALARM_INTERRUPT_CASUE_REG_OFFS 0x14
struct rtc_plat_data {
struct rtc_device *rtc;
void __iomem *ioaddr;
+ int irq;
};
static int mv_rtc_set_time(struct device *dev, struct rtc_time *tm)
@@ -84,12 +91,134 @@ static int mv_rtc_read_time(struct device *dev, struct rtc_time *tm)
return rtc_valid_tm(tm);
}
+static int mv_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
+{
+ struct rtc_plat_data *pdata = dev_get_drvdata(dev);
+ void __iomem *ioaddr = pdata->ioaddr;
+ u32 rtc_time, rtc_date;
+ unsigned int year, month, day, hour, minute, second, wday;
+
+ rtc_time = readl(ioaddr + RTC_ALARM_TIME_REG_OFFS);
+ rtc_date = readl(ioaddr + RTC_ALARM_DATE_REG_OFFS);
+
+ second = rtc_time & 0x7f;
+ minute = (rtc_time >> RTC_MINUTES_OFFS) & 0x7f;
+ hour = (rtc_time >> RTC_HOURS_OFFS) & 0x3f; /* assume 24 hours mode */
+ wday = (rtc_time >> RTC_WDAY_OFFS) & 0x7;
+
+ day = rtc_date & 0x3f;
+ month = (rtc_date >> RTC_MONTH_OFFS) & 0x3f;
+ year = (rtc_date >> RTC_YEAR_OFFS) & 0xff;
+
+ alm->time.tm_sec = bcd2bin(second);
+ alm->time.tm_min = bcd2bin(minute);
+ alm->time.tm_hour = bcd2bin(hour);
+ alm->time.tm_mday = bcd2bin(day);
+ alm->time.tm_wday = bcd2bin(wday);
+ alm->time.tm_mon = bcd2bin(month) - 1;
+ /* hw counts from year 2000, but tm_year is relative to 1900 */
+ alm->time.tm_year = bcd2bin(year) + 100;
+
+ if (rtc_valid_tm(&alm->time) < 0) {
+ dev_err(dev, "retrieved alarm date/time is not valid.\n");
+ rtc_time_to_tm(0, &alm->time);
+ }
+
+ alm->enabled = !!readl(ioaddr + RTC_ALARM_INTERRUPT_MASK_REG_OFFS);
+ return 0;
+}
+
+static int mv_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
+{
+ struct rtc_plat_data *pdata = dev_get_drvdata(dev);
+ void __iomem *ioaddr = pdata->ioaddr;
+ u32 rtc_reg = 0;
+
+ if (alm->time.tm_sec >= 0)
+ rtc_reg |= (RTC_ALARM_VALID | bin2bcd(alm->time.tm_sec))
+ << RTC_SECONDS_OFFS;
+ if (alm->time.tm_min >= 0)
+ rtc_reg |= (RTC_ALARM_VALID | bin2bcd(alm->time.tm_min))
+ << RTC_MINUTES_OFFS;
+ if (alm->time.tm_hour >= 0)
+ rtc_reg |= (RTC_ALARM_VALID | bin2bcd(alm->time.tm_hour))
+ << RTC_HOURS_OFFS;
+
+ writel(rtc_reg, ioaddr + RTC_ALARM_TIME_REG_OFFS);
+
+ if (alm->time.tm_mday >= 0)
+ rtc_reg = (RTC_ALARM_VALID | bin2bcd(alm->time.tm_mday))
+ << RTC_MDAY_OFFS;
+ else
+ rtc_reg = 0;
+
+ if (alm->time.tm_mon >= 0)
+ rtc_reg |= (RTC_ALARM_VALID | bin2bcd(alm->time.tm_mon + 1))
+ << RTC_MONTH_OFFS;
+
+ if (alm->time.tm_year >= 0)
+ rtc_reg |= (RTC_ALARM_VALID | bin2bcd(alm->time.tm_year % 100))
+ << RTC_YEAR_OFFS;
+
+ writel(rtc_reg, ioaddr + RTC_ALARM_DATE_REG_OFFS);
+ writel(0, ioaddr + RTC_ALARM_INTERRUPT_CASUE_REG_OFFS);
+ writel(alm->enabled ? 1 : 0,
+ ioaddr + RTC_ALARM_INTERRUPT_MASK_REG_OFFS);
+
+ return 0;
+}
+
+static int mv_rtc_ioctl(struct device *dev, unsigned int cmd,
+ unsigned long arg)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
+ void __iomem *ioaddr = pdata->ioaddr;
+
+ if (pdata->irq < 0)
+ return -ENOIOCTLCMD; /* fall back into rtc-dev's emulation */
+ switch (cmd) {
+ case RTC_AIE_OFF:
+ writel(0, ioaddr + RTC_ALARM_INTERRUPT_MASK_REG_OFFS);
+ break;
+ case RTC_AIE_ON:
+ writel(1, ioaddr + RTC_ALARM_INTERRUPT_MASK_REG_OFFS);
+ break;
+ default:
+ return -ENOIOCTLCMD;
+ }
+ return 0;
+}
+
+static irqreturn_t mv_rtc_interrupt(int irq, void *data)
+{
+ struct rtc_plat_data *pdata = data;
+ void __iomem *ioaddr = pdata->ioaddr;
+
+ /* alarm irq? */
+ if (!readl(ioaddr + RTC_ALARM_INTERRUPT_CASUE_REG_OFFS))
+ return IRQ_NONE;
+
+ /* clear interrupt */
+ writel(0, ioaddr + RTC_ALARM_INTERRUPT_CASUE_REG_OFFS);
+ rtc_update_irq(pdata->rtc, 1, RTC_IRQF | RTC_AF);
+ return IRQ_HANDLED;
+}
+
static const struct rtc_class_ops mv_rtc_ops = {
.read_time = mv_rtc_read_time,
.set_time = mv_rtc_set_time,
};
-static int __init mv_rtc_probe(struct platform_device *pdev)
+static const struct rtc_class_ops mv_rtc_alarm_ops = {
+ .read_time = mv_rtc_read_time,
+ .set_time = mv_rtc_set_time,
+ .read_alarm = mv_rtc_read_alarm,
+ .set_alarm = mv_rtc_set_alarm,
+ .ioctl = mv_rtc_ioctl,
+};
+
+static int __devinit mv_rtc_probe(struct platform_device *pdev)
{
struct resource *res;
struct rtc_plat_data *pdata;
@@ -130,12 +259,31 @@ static int __init mv_rtc_probe(struct platform_device *pdev)
}
}
+ pdata->irq = platform_get_irq(pdev, 0);
+
platform_set_drvdata(pdev, pdata);
- pdata->rtc = rtc_device_register(pdev->name, &pdev->dev,
- &mv_rtc_ops, THIS_MODULE);
+
+ if (pdata->irq >= 0) {
+ device_init_wakeup(&pdev->dev, 1);
+ pdata->rtc = rtc_device_register(pdev->name, &pdev->dev,
+ &mv_rtc_alarm_ops,
+ THIS_MODULE);
+ } else
+ pdata->rtc = rtc_device_register(pdev->name, &pdev->dev,
+ &mv_rtc_ops, THIS_MODULE);
if (IS_ERR(pdata->rtc))
return PTR_ERR(pdata->rtc);
+ if (pdata->irq >= 0) {
+ writel(0, pdata->ioaddr + RTC_ALARM_INTERRUPT_MASK_REG_OFFS);
+ if (devm_request_irq(&pdev->dev, pdata->irq, mv_rtc_interrupt,
+ IRQF_DISABLED | IRQF_SHARED,
+ pdev->name, pdata) < 0) {
+ dev_warn(&pdev->dev, "interrupt not available.\n");
+ pdata->irq = -1;
+ }
+ }
+
return 0;
}
@@ -143,6 +291,9 @@ static int __exit mv_rtc_remove(struct platform_device *pdev)
{
struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
+ if (pdata->irq >= 0)
+ device_init_wakeup(&pdev->dev, 0);
+
rtc_device_unregister(pdata->rtc);
return 0;
}