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Subject[PATCH 4/7] rtc: PCF50633 rtc driver
Date
Signed-off-by: Balaji Rao <balajirrao@openmoko.org>
Cc: Andy Green <andy@openmoko.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Paul Gortmaker <a.zummo@towertech.it>
---
drivers/rtc/Kconfig | 6 +
drivers/rtc/Makefile | 1
drivers/rtc/rtc-pcf50633.c | 302 ++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 309 insertions(+), 0 deletions(-)
create mode 100644 drivers/rtc/rtc-pcf50633.c
diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 123092d..68e68d2 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -497,6 +497,12 @@ config RTC_DRV_WM8350
This driver can also be built as a module. If so, the module
will be called "rtc-wm8350".

+config RTC_DRV_PCF50633
+ depends on MFD_PCF50633
+ tristate "NXP PCF50633 RTC"
+ help
+ If you say yes here you get support for the NXP PCF50633 RTC.
+
comment "on-CPU RTC drivers"

config RTC_DRV_OMAP
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 6e79c91..a717fec 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -70,3 +70,4 @@ obj-$(CONFIG_RTC_DRV_V3020) += rtc-v3020.o
obj-$(CONFIG_RTC_DRV_VR41XX) += rtc-vr41xx.o
obj-$(CONFIG_RTC_DRV_WM8350) += rtc-wm8350.o
obj-$(CONFIG_RTC_DRV_X1205) += rtc-x1205.o
+obj-$(CONFIG_RTC_DRV_PCF50633) += rtc-pcf50633.o
diff --git a/drivers/rtc/rtc-pcf50633.c b/drivers/rtc/rtc-pcf50633.c
new file mode 100644
index 0000000..f314810
--- /dev/null
+++ b/drivers/rtc/rtc-pcf50633.c
@@ -0,0 +1,302 @@
+/* NXP PCF50633 RTC Driver
+ *
+ * (C) 2006-2008 by Openmoko, Inc.
+ * Author: Balaji Rao <balajirrao@openmoko.org>
+ * All rights reserved.
+ *
+ * Broken down from monstrous PCF50633 driver mainly by
+ * Harald Welte, Andy Green and Werner Almesberger
+ *
+ * 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 the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * 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/rtc.h>
+#include <linux/platform_device.h>
+#include <linux/bcd.h>
+
+#include <linux/mfd/pcf50633/core.h>
+#include <linux/mfd/pcf50633/rtc.h>
+
+enum pcf50633_time_indexes {
+ PCF50633_TI_SEC,
+ PCF50633_TI_MIN,
+ PCF50633_TI_HOUR,
+ PCF50633_TI_WKDAY,
+ PCF50633_TI_DAY,
+ PCF50633_TI_MONTH,
+ PCF50633_TI_YEAR,
+ PCF50633_TI_EXTENT /* always last */
+};
+
+
+struct pcf50633_time {
+ u_int8_t time[PCF50633_TI_EXTENT];
+};
+
+static void pcf2rtc_time(struct rtc_time *rtc, struct pcf50633_time *pcf)
+{
+ rtc->tm_sec = bcd2bin(pcf->time[PCF50633_TI_SEC]);
+ rtc->tm_min = bcd2bin(pcf->time[PCF50633_TI_MIN]);
+ rtc->tm_hour = bcd2bin(pcf->time[PCF50633_TI_HOUR]);
+ rtc->tm_wday = bcd2bin(pcf->time[PCF50633_TI_WKDAY]);
+ rtc->tm_mday = bcd2bin(pcf->time[PCF50633_TI_DAY]);
+ rtc->tm_mon = bcd2bin(pcf->time[PCF50633_TI_MONTH]);
+ rtc->tm_year = bcd2bin(pcf->time[PCF50633_TI_YEAR]) + 100;
+}
+
+static void rtc2pcf_time(struct pcf50633_time *pcf, struct rtc_time *rtc)
+{
+ pcf->time[PCF50633_TI_SEC] = bin2bcd(rtc->tm_sec);
+ pcf->time[PCF50633_TI_MIN] = bin2bcd(rtc->tm_min);
+ pcf->time[PCF50633_TI_HOUR] = bin2bcd(rtc->tm_hour);
+ pcf->time[PCF50633_TI_WKDAY] = bin2bcd(rtc->tm_wday);
+ pcf->time[PCF50633_TI_DAY] = bin2bcd(rtc->tm_mday);
+ pcf->time[PCF50633_TI_MONTH] = bin2bcd(rtc->tm_mon);
+ pcf->time[PCF50633_TI_YEAR] = bin2bcd(rtc->tm_year - 100);
+}
+
+static int
+pcf50633_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
+{
+ struct pcf50633 *pcf;
+
+ pcf = dev_get_drvdata(dev);
+
+ switch (cmd) {
+ case RTC_AIE_OFF:
+ pcf->rtc.alarm_enabled = 0;
+ pcf50633_irq_mask(pcf, PCF50633_IRQ_ALARM);
+ return 0;
+ case RTC_AIE_ON:
+ pcf->rtc.alarm_enabled = 1;
+ pcf50633_irq_unmask(pcf, PCF50633_IRQ_ALARM);
+ return 0;
+ case RTC_PIE_OFF:
+ pcf->rtc.second_enabled = 0;
+ pcf50633_irq_mask(pcf, PCF50633_IRQ_SECOND);
+ return 0;
+ case RTC_PIE_ON:
+ pcf->rtc.second_enabled = 1;
+ pcf50633_irq_unmask(pcf, PCF50633_IRQ_SECOND);
+ return 0;
+ }
+
+ return -ENOIOCTLCMD;
+}
+
+static int pcf50633_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+ struct pcf50633 *pcf;
+ struct pcf50633_time pcf_tm;
+ int ret;
+
+ pcf = dev_get_drvdata(dev);
+
+ ret = pcf50633_read_block(pcf, PCF50633_REG_RTCSC,
+ PCF50633_TI_EXTENT,
+ &pcf_tm.time[0]);
+ if (ret != PCF50633_TI_EXTENT)
+ dev_err(dev, "Failed to read time\n");
+
+ dev_dbg(dev, "PCF_TIME: %02x.%02x.%02x %02x:%02x:%02x\n",
+ pcf_tm.time[PCF50633_TI_DAY],
+ pcf_tm.time[PCF50633_TI_MONTH],
+ pcf_tm.time[PCF50633_TI_YEAR],
+ pcf_tm.time[PCF50633_TI_HOUR],
+ pcf_tm.time[PCF50633_TI_MIN],
+ pcf_tm.time[PCF50633_TI_SEC]);
+
+ pcf2rtc_time(tm, &pcf_tm);
+
+ dev_dbg(dev, "RTC_TIME: %u.%u.%u %u:%u:%u\n",
+ tm->tm_mday, tm->tm_mon, tm->tm_year,
+ tm->tm_hour, tm->tm_min, tm->tm_sec);
+
+ return 0;
+}
+
+static int pcf50633_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+ struct pcf50633 *pcf;
+ struct pcf50633_time pcf_tm;
+ int second_masked, alarm_masked, ret = 0;
+
+ pcf = dev_get_drvdata(dev);
+
+ dev_dbg(dev, "RTC_TIME: %u.%u.%u %u:%u:%u\n",
+ tm->tm_mday, tm->tm_mon, tm->tm_year,
+ tm->tm_hour, tm->tm_min, tm->tm_sec);
+
+ rtc2pcf_time(&pcf_tm, tm);
+
+ dev_dbg(dev, "PCF_TIME: %02x.%02x.%02x %02x:%02x:%02x\n",
+ pcf_tm.time[PCF50633_TI_DAY],
+ pcf_tm.time[PCF50633_TI_MONTH],
+ pcf_tm.time[PCF50633_TI_YEAR],
+ pcf_tm.time[PCF50633_TI_HOUR],
+ pcf_tm.time[PCF50633_TI_MIN],
+ pcf_tm.time[PCF50633_TI_SEC]);
+
+
+ second_masked = pcf50633_irq_mask_get(pcf, PCF50633_IRQ_SECOND);
+ alarm_masked = pcf50633_irq_mask_get(pcf, PCF50633_IRQ_ALARM);
+
+ if (!second_masked)
+ pcf50633_irq_mask(pcf, PCF50633_IRQ_SECOND);
+ if (!alarm_masked)
+ pcf50633_irq_mask(pcf, PCF50633_IRQ_ALARM);
+
+ ret = pcf50633_write_block(pcf, PCF50633_REG_RTCSC,
+ PCF50633_TI_EXTENT,
+ &pcf_tm.time[0]);
+ if (ret)
+ dev_err(dev, "Failed to set time %d\n", ret);
+
+ if (!second_masked)
+ pcf50633_irq_unmask(pcf, PCF50633_IRQ_SECOND);
+ if (!alarm_masked)
+ pcf50633_irq_unmask(pcf, PCF50633_IRQ_ALARM);
+
+ return ret;
+}
+
+static int pcf50633_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+ struct pcf50633 *pcf;
+ struct pcf50633_time pcf_tm;
+ int ret = 0;
+
+ pcf = dev_get_drvdata(dev);
+
+ alrm->enabled = pcf->rtc.alarm_enabled;
+
+ ret = pcf50633_read_block(pcf, PCF50633_REG_RTCSCA,
+ PCF50633_TI_EXTENT, &pcf_tm.time[0]);
+
+ if (ret != PCF50633_TI_EXTENT)
+ dev_err(dev, "Failed to read Alarm time %d\n", ret);
+
+ pcf2rtc_time(&alrm->time, &pcf_tm);
+
+ return ret;
+}
+
+static int pcf50633_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+ struct pcf50633 *pcf;
+ struct pcf50633_time pcf_tm;
+ int alarm_masked, ret = 0;
+
+ pcf = dev_get_drvdata(dev);
+
+ rtc2pcf_time(&pcf_tm, &alrm->time);
+
+ /* do like mktime does and ignore tm_wday */
+ pcf_tm.time[PCF50633_TI_WKDAY] = 7;
+
+ alarm_masked = pcf50633_irq_mask_get(pcf, PCF50633_IRQ_ALARM);
+
+ /* disable alarm interrupt */
+ if (!alarm_masked)
+ pcf50633_irq_mask(pcf, PCF50633_IRQ_ALARM);
+
+ ret = pcf50633_write_block(pcf, PCF50633_REG_RTCSCA,
+ PCF50633_TI_EXTENT, &pcf_tm.time[0]);
+ if (ret)
+ dev_err(dev, "Failed to write alarm time %d\n", ret);
+
+ if (!alarm_masked)
+ pcf50633_irq_unmask(pcf, PCF50633_IRQ_ALARM);
+
+ return ret;
+}
+static struct rtc_class_ops pcf50633_rtc_ops = {
+ .ioctl = pcf50633_rtc_ioctl,
+ .read_time = pcf50633_rtc_read_time,
+ .set_time = pcf50633_rtc_set_time,
+ .read_alarm = pcf50633_rtc_read_alarm,
+ .set_alarm = pcf50633_rtc_set_alarm,
+};
+
+static void pcf50633_rtc_irq(struct pcf50633 *pcf, int irq, void *unused)
+{
+ switch (irq) {
+ case PCF50633_IRQ_ALARM:
+ rtc_update_irq(pcf->rtc.rtc_dev, 1, RTC_AF | RTC_IRQF);
+ break;
+ case PCF50633_IRQ_SECOND:
+ rtc_update_irq(pcf->rtc.rtc_dev, 1, RTC_PF | RTC_IRQF);
+ break;
+ }
+}
+
+static int pcf50633_rtc_probe(struct platform_device *pdev)
+{
+ struct rtc_device *rtc;
+ struct pcf50633 *pcf;
+
+ rtc = rtc_device_register("pcf50633-rtc", &pdev->dev,
+ &pcf50633_rtc_ops, THIS_MODULE);
+ if (IS_ERR(rtc))
+ return -ENODEV;
+
+ pcf = platform_get_drvdata(pdev);
+
+ /* Set up IRQ handlers */
+ pcf->irq_handler[PCF50633_IRQ_ALARM].handler = pcf50633_rtc_irq;
+ pcf->irq_handler[PCF50633_IRQ_SECOND].handler = pcf50633_rtc_irq;
+
+ pcf->rtc.rtc_dev = rtc;
+
+ return 0;
+}
+
+static int pcf50633_rtc_remove(struct platform_device *pdev)
+{
+ struct pcf50633 *pcf;
+
+ pcf = platform_get_drvdata(pdev);
+ rtc_device_unregister(pcf->rtc.rtc_dev);
+
+ return 0;
+}
+
+
+static struct platform_driver pcf50633_rtc_driver = {
+ .driver = {
+ .name = "pcf50633-rtc",
+ },
+ .probe = pcf50633_rtc_probe,
+ .remove = __devexit_p(pcf50633_rtc_remove),
+};
+
+static int __init pcf50633_rtc_init(void)
+{
+ return platform_driver_register(&pcf50633_rtc_driver);
+}
+module_init(pcf50633_rtc_init);
+
+static void __exit pcf50633_rtc_exit(void)
+{
+ platform_driver_unregister(&pcf50633_rtc_driver);
+}
+module_exit(pcf50633_rtc_exit);
+
+
+MODULE_DESCRIPTION("PCF50633 RTC driver");
+MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
+MODULE_LICENSE("GPL");
+


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