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/* Philips PCF50606 RTC Driver
*
* (C) 2006-2008 by Openmoko, Inc.
* Author: Balaji Rao <balajirrao@openmoko.org>
* All rights reserved.
*
* Broken down from monstrous PCF50606 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 060, Boston,
* MA 02111-1307 USA
*/
#include <linux/rtc.h>
#include <linux/platform_device.h>
#include <linux/bcd.h>
#include <linux/mfd/pcf50606/core.h>
#include <linux/mfd/pcf50606/rtc.h>
enum pcf50606_time_indexes {
PCF50606_TI_SEC = 0,
PCF50606_TI_MIN,
PCF50606_TI_HOUR,
PCF50606_TI_WKDAY,
PCF50606_TI_DAY,
PCF50606_TI_MONTH,
PCF50606_TI_YEAR,
PCF50606_TI_EXTENT /* always last */
};
struct pcf50606_time {
u_int8_t time[PCF50606_TI_EXTENT];
};
static void pcf2rtc_time(struct rtc_time *rtc, struct pcf50606_time *pcf)
{
rtc->tm_sec = bcd2bin(pcf->time[PCF50606_TI_SEC]);
rtc->tm_min = bcd2bin(pcf->time[PCF50606_TI_MIN]);
rtc->tm_hour = bcd2bin(pcf->time[PCF50606_TI_HOUR]);
rtc->tm_wday = bcd2bin(pcf->time[PCF50606_TI_WKDAY]);
rtc->tm_mday = bcd2bin(pcf->time[PCF50606_TI_DAY]);
rtc->tm_mon = bcd2bin(pcf->time[PCF50606_TI_MONTH]);
rtc->tm_year = bcd2bin(pcf->time[PCF50606_TI_YEAR]) + 100;
}
static void rtc2pcf_time(struct pcf50606_time *pcf, struct rtc_time *rtc)
{
pcf->time[PCF50606_TI_SEC] = bin2bcd(rtc->tm_sec);
pcf->time[PCF50606_TI_MIN] = bin2bcd(rtc->tm_min);
pcf->time[PCF50606_TI_HOUR] = bin2bcd(rtc->tm_hour);
pcf->time[PCF50606_TI_WKDAY] = bin2bcd(rtc->tm_wday);
pcf->time[PCF50606_TI_DAY] = bin2bcd(rtc->tm_mday);
pcf->time[PCF50606_TI_MONTH] = bin2bcd(rtc->tm_mon);
pcf->time[PCF50606_TI_YEAR] = bin2bcd(rtc->tm_year - 100);
}
static int pcf50606_rtc_ioctl(struct device *dev, unsigned int cmd,
unsigned long arg)
{
struct pcf50606 *pcf;
pcf = dev_get_drvdata(dev);
switch (cmd) {
case RTC_AIE_OFF:
/* disable the alarm interrupt */
pcf->rtc.alarm_enabled = 0;
pcf50606_irq_mask(pcf, PCF50606_IRQ_ALARM);
return 0;
case RTC_AIE_ON:
/* enable the alarm interrupt */
pcf->rtc.alarm_enabled = 1;
pcf50606_irq_unmask(pcf, PCF50606_IRQ_ALARM);
return 0;
case RTC_PIE_OFF:
/* disable periodic interrupt (hz tick) */
pcf->rtc.second_enabled = 0;
pcf50606_irq_mask(pcf, PCF50606_IRQ_SECOND);
return 0;
case RTC_PIE_ON:
/* ensable periodic interrupt (hz tick) */
pcf->rtc.second_enabled = 1;
pcf50606_irq_unmask(pcf, PCF50606_IRQ_SECOND);
return 0;
}
return -ENOIOCTLCMD;
}
static int pcf50606_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
struct pcf50606 *pcf;
struct pcf50606_time pcf_tm;
int ret;
pcf = dev_get_drvdata(dev);
ret = pcf50606_read_block(pcf, PCF50606_REG_RTCSC,
PCF50606_TI_EXTENT,
&pcf_tm.time[0]);
if (ret != PCF50606_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[PCF50606_TI_DAY],
pcf_tm.time[PCF50606_TI_MONTH],
pcf_tm.time[PCF50606_TI_YEAR],
pcf_tm.time[PCF50606_TI_HOUR],
pcf_tm.time[PCF50606_TI_MIN],
pcf_tm.time[PCF50606_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 pcf50606_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
struct pcf50606 *pcf;
struct pcf50606_time pcf_tm;
int ret;
int second_masked, alarm_masked;
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[PCF50606_TI_DAY],
pcf_tm.time[PCF50606_TI_MONTH],
pcf_tm.time[PCF50606_TI_YEAR],
pcf_tm.time[PCF50606_TI_HOUR],
pcf_tm.time[PCF50606_TI_MIN],
pcf_tm.time[PCF50606_TI_SEC]);
second_masked = pcf50606_irq_mask_get(pcf, PCF50606_IRQ_SECOND);
alarm_masked = pcf50606_irq_mask_get(pcf, PCF50606_IRQ_ALARM);
if (!second_masked)
pcf50606_irq_mask(pcf, PCF50606_IRQ_SECOND);
if (!alarm_masked)
pcf50606_irq_mask(pcf, PCF50606_IRQ_ALARM);
ret = pcf50606_write_block(pcf, PCF50606_REG_RTCSC,
PCF50606_TI_EXTENT,
&pcf_tm.time[0]);
if (ret)
dev_err(dev, "Failed to set time %d\n", ret);
if (!second_masked)
pcf50606_irq_unmask(pcf, PCF50606_IRQ_SECOND);
if (!alarm_masked)
pcf50606_irq_unmask(pcf, PCF50606_IRQ_ALARM);
return 0;
}
static int pcf50606_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
struct pcf50606 *pcf;
struct pcf50606_time pcf_tm;
int ret;
pcf = dev_get_drvdata(dev);
alrm->enabled = pcf->rtc.alarm_enabled;
ret = pcf50606_read_block(pcf, PCF50606_REG_RTCSCA,
PCF50606_TI_EXTENT, &pcf_tm.time[0]);
if (ret != PCF50606_TI_EXTENT)
dev_err(dev, "Failed to read Alarm time :-(\n");
pcf2rtc_time(&alrm->time, &pcf_tm);
return 0;
}
static int pcf50606_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
struct pcf50606 *pcf;
struct pcf50606_time pcf_tm;
int ret, alarm_masked;
pcf = dev_get_drvdata(dev);
rtc2pcf_time(&pcf_tm, &alrm->time);
alarm_masked = pcf50606_irq_mask_get(pcf, PCF50606_IRQ_ALARM);
/* disable alarm interrupt */
if (!alarm_masked)
pcf50606_irq_mask(pcf, PCF50606_IRQ_ALARM);
ret = pcf50606_write_block(pcf, PCF50606_REG_RTCSCA,
PCF50606_TI_EXTENT, &pcf_tm.time[0]);
if (ret)
dev_err(dev, "Failed to write alarm time %d\n", ret);
if (!alarm_masked)
pcf50606_irq_unmask(pcf, PCF50606_IRQ_ALARM);
return 0;
}
static struct rtc_class_ops pcf50606_rtc_ops = {
.ioctl = pcf50606_rtc_ioctl,
.read_time = pcf50606_rtc_read_time,
.set_time = pcf50606_rtc_set_time,
.read_alarm = pcf50606_rtc_read_alarm,
.set_alarm = pcf50606_rtc_set_alarm,
};
static void pcf50606_rtc_irq(struct pcf50606 *pcf, int irq, void *unused)
{
switch (irq) {
case PCF50606_IRQ_ALARM:
rtc_update_irq(pcf->rtc.rtc_dev, 1, RTC_AF | RTC_IRQF);
break;
case PCF50606_IRQ_SECOND:
rtc_update_irq(pcf->rtc.rtc_dev, 1, RTC_PF | RTC_IRQF);
break;
}
}
static int pcf50606_rtc_probe(struct platform_device *pdev)
{
struct rtc_device *rtc;
struct pcf50606 *pcf;
rtc = rtc_device_register("pcf50606", &pdev->dev,
&pcf50606_rtc_ops, THIS_MODULE);
if (IS_ERR(rtc))
return -ENODEV;
pcf = platform_get_drvdata(pdev);
/* Set up IRQ handlers */
pcf->irq_handler[PCF50606_IRQ_ALARM].handler = pcf50606_rtc_irq;
pcf->irq_handler[PCF50606_IRQ_SECOND].handler = pcf50606_rtc_irq;
pcf->rtc.rtc_dev = rtc;
return 0;
}
static int pcf50606_rtc_remove(struct platform_device *pdev)
{
return 0;
}
static struct platform_driver pcf50606_rtc_driver = {
.driver = {
.name = "pcf50606-rtc",
},
.probe = pcf50606_rtc_probe,
.remove = __devexit_p(pcf50606_rtc_remove),
};
static int __init pcf50606_rtc_init(void)
{
return platform_driver_register(&pcf50606_rtc_driver);
}
module_init(pcf50606_rtc_init);
static void __exit pcf50606_rtc_exit(void)
{
platform_driver_unregister(&pcf50606_rtc_driver);
}
module_exit(pcf50606_rtc_exit);
MODULE_DESCRIPTION("RTC driver for NXP PCF50606 power management unit");
MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
MODULE_LICENSE("GPL");
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