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#include <linux/rtc.h>
#include <linux/platform_device.h>
#include <linux/bcd.h>
#include <linux/pcf50633.h>
#include <linux/rtc/pcf50633.h>
#include <linux/i2c.h>
enum pcf50633_time_indexes {
PCF50633_TI_SEC = 0,
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_data *pcf = dev->platform_data;
switch (cmd) {
case RTC_AIE_OFF:
/* disable the alarm interrupt */
pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_INT1M,
PCF50633_INT1_ALARM, PCF50633_INT1_ALARM);
return 0;
case RTC_AIE_ON:
/* enable the alarm interrupt */
pcf50633_reg_clear_bits(pcf, PCF50633_REG_INT1M, PCF50633_INT1_ALARM);
return 0;
case RTC_PIE_OFF:
/* disable periodic interrupt (hz tick) */
pcf->flags &= ~PCF50633_F_RTC_SECOND;
pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_INT1M,
PCF50633_INT1_SECOND, PCF50633_INT1_SECOND);
return 0;
case RTC_PIE_ON:
/* ensable periodic interrupt (hz tick) */
pcf->flags |= PCF50633_F_RTC_SECOND;
pcf50633_reg_clear_bits(pcf, PCF50633_REG_INT1M, PCF50633_INT1_SECOND);
return 0;
}
return -ENOIOCTLCMD;
}
#ifdef PCF50633_RTC
void pcf50633_rtc_handle_event(struct pcf50633_data *pcf,
enum pcf50633_rtc_event evt)
{
switch(evt) {
case PCF50633_RTC_EVENT_ALARM:
rtc_update_irq(pcf->rtc, 1, RTC_AF | RTC_IRQF);
break;
case PCF50633_RTC_EVENT_SECOND:
rtc_update_irq(pcf->rtc, 1, RTC_PF | RTC_IRQF);
}
}
#else
void pcf50633_rtc_handle_event(struct pcf50633_data *pcf,
enum pcf50633_rtc_event evt)
{
}
#endif
static int pcf50633_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
struct pcf50633_data *pcf = dev->platform_data;
struct pcf50633_time pcf_tm;
int ret;
mutex_lock(&pcf->lock);
ret = i2c_smbus_read_i2c_block_data(pcf->client,
PCF50633_REG_RTCSC,
PCF50633_TI_EXTENT,
&pcf_tm.time[0]);
if (ret != PCF50633_TI_EXTENT)
dev_err(dev, "Failed to read time :-(\n");
mutex_unlock(&pcf->lock);
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_data *pcf = dev->platform_data;
struct pcf50633_time pcf_tm;
int ret;
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]);
mutex_lock(&pcf->lock);
/* FIXME: disable second interrupt */
ret = i2c_smbus_write_i2c_block_data(pcf->client,
PCF50633_REG_RTCSC,
PCF50633_TI_EXTENT,
&pcf_tm.time[0]);
if (ret)
dev_err(dev, "Failed to set time %d\n", ret);
/* FIXME: re-enable second interrupt */
mutex_unlock(&pcf->lock);
return 0;
}
static int pcf50633_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
struct pcf50633_data *pcf = dev->platform_data;
struct pcf50633_time pcf_tm;
int ret;
u_int8_t reg;
mutex_lock(&pcf->lock);
pcf50633_read(pcf, PCF50633_REG_INT1M, 1, ®);
alrm->enabled = reg & PCF50633_INT1_ALARM ? 0 : 1;
ret = pcf50633_read(pcf, PCF50633_REG_RTCSCA,
PCF50633_TI_EXTENT, &pcf_tm.time[0]);
if (ret != PCF50633_TI_EXTENT)
dev_err(dev, "Failed to read Alarm time :-(\n");
mutex_unlock(&pcf->lock);
pcf2rtc_time(&alrm->time, &pcf_tm);
return 0;
}
static int pcf50633_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
struct pcf50633_data *pcf = dev->platform_data;
struct pcf50633_time pcf_tm;
u_int8_t irqmask;
int ret;
rtc2pcf_time(&pcf_tm, &alrm->time);
mutex_lock(&pcf->lock);
/* disable alarm interrupt */
pcf50633_read(pcf, PCF50633_REG_INT1M, 1, &irqmask);
irqmask |= PCF50633_INT1_ALARM;
pcf50633_write(pcf, PCF50633_REG_INT1M, 1, &irqmask);
ret = pcf50633_write(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 (alrm->enabled) {
/* (re-)enaable alarm interrupt */
pcf50633_read(pcf, PCF50633_REG_INT1M, 1, &irqmask);
irqmask &= ~PCF50633_INT1_ALARM;
pcf50633_write(pcf, PCF50633_REG_INT1M, 1, &irqmask);
}
mutex_unlock(&pcf->lock);
/* FIXME */
return 0;
}
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 int pcf50633_rtc_probe(struct platform_device *pdev)
{
struct rtc_device *rtc;
rtc = rtc_device_register("pcf50633", &pdev->dev,
&pcf50633_rtc_ops, THIS_MODULE);
if (IS_ERR(rtc))
return -ENODEV;
return 0;
}
static int pcf50633_rtc_remove(struct platform_device *pdev)
{
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("RTC driver for NXP PCF50633 power management unit");
MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
MODULE_LICENSE("GPL");
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