static int mxc_rtc_alarm_irq_enable(struct device *dev, unsigned int enable)
{
struct rtc_drv_data *pdata = dev_get_drvdata(dev);
void __iomem *ioaddr = pdata->ioaddr;
u32 lp_cr;
unsigned long lock_flags = 0;
spin_lock_irqsave(&rtc_lock, lock_flags);
if (enable) {
if (!pdata->irq_enable) {
enable_irq(pdata->irq);
pdata->irq_enable = true;
}
lp_cr = __raw_readl(ioaddr + SRTC_LPCR);
lp_cr |= SRTC_LPCR_ALP | SRTC_LPCR_WAE;
__raw_writel(lp_cr, ioaddr + SRTC_LPCR);
} else {
lp_cr = __raw_readl(ioaddr + SRTC_LPCR);
lp_cr &= ~(SRTC_LPCR_ALP | SRTC_LPCR_WAE);
if (((lp_cr & SRTC_LPCR_ALL_INT_EN) == 0)
&& (pdata->irq_enable)) {
disable_irq(pdata->irq);
pdata->irq_enable = false;
}
__raw_writel(lp_cr, ioaddr + SRTC_LPCR);
}
rtc_write_sync_lp(ioaddr);
spin_unlock_irqrestore(&rtc_lock, lock_flags);
return 0;
}
/*!
* This function sets the internal RTC time based on tm in Gregorian date.
*
* @param tm the time value to be set in the RTC
*
* @return 0 if successful; non-zero otherwise.
*/
static int mxc_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
struct rtc_drv_data *pdata = dev_get_drvdata(dev);
void __iomem *ioaddr = pdata->ioaddr;
unsigned long time;
u64 old_time_47bit, new_time_47bit;
int ret;
ret = rtc_tm_to_time(tm, &time);
if (ret != 0)
return ret;
old_time_47bit = (((u64) __raw_readl(ioaddr + SRTC_LPSCMR)) << 32 |
((u64) __raw_readl(ioaddr + SRTC_LPSCLR)));
old_time_47bit >>= SRTC_LPSCLR_LLPSC_LSH;
__raw_writel(time, ioaddr + SRTC_LPSCMR);
rtc_write_sync_lp(ioaddr);
new_time_47bit = (((u64) __raw_readl(ioaddr + SRTC_LPSCMR)) << 32 |
((u64) __raw_readl(ioaddr + SRTC_LPSCLR)));
new_time_47bit >>= SRTC_LPSCLR_LLPSC_LSH;
/* update the difference between previous time and new time */
time_diff = new_time_47bit - old_time_47bit;
/* signal all waiting threads that time changed */
complete_all(&srtc_completion);
/* reinitialize completion variable */
INIT_COMPLETION(srtc_completion);
return 0;
}
/*!
* This function sets the internal RTC time based on tm in Gregorian date.
*
* @param tm the time value to be set in the RTC
*
* @return 0 if successful; non-zero otherwise.
*/
static int mxc_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
struct rtc_drv_data *pdata = dev_get_drvdata(dev);
void __iomem *ioaddr = pdata->ioaddr;
unsigned long time;
int ret;
ret = rtc_tm_to_time(tm, &time);
if (ret != 0)
return ret;
__raw_writel(time, ioaddr + SRTC_LPSCMR);
rtc_write_sync_lp(ioaddr);
return 0;
}
/*!
* This function sets the RTC alarm based on passed in alrm.
*
* @param alrm the alarm value to be set in the RTC
*
* @return 0 if successful; non-zero otherwise.
*/
static int mxc_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
{
struct rtc_drv_data *pdata = dev_get_drvdata(dev);
void __iomem *ioaddr = pdata->ioaddr;
unsigned long lock_flags = 0;
u32 lp_cr;
int ret;
if (rtc_valid_tm(&alrm->time)) {
if (alrm->time.tm_sec > 59 ||
alrm->time.tm_hour > 23 || alrm->time.tm_min > 59) {
return -EINVAL;
}
}
spin_lock_irqsave(&rtc_lock, lock_flags);
lp_cr = __raw_readl(ioaddr + SRTC_LPCR);
ret = rtc_update_alarm(dev, &alrm->time);
if (ret)
goto out;
if (alrm->enabled)
lp_cr |= (SRTC_LPCR_ALP | SRTC_LPCR_WAE);
else
lp_cr &= ~(SRTC_LPCR_ALP | SRTC_LPCR_WAE);
if (lp_cr & SRTC_LPCR_ALL_INT_EN) {
if (!pdata->irq_enable) {
enable_irq(pdata->irq);
pdata->irq_enable = true;
}
} else {
if (pdata->irq_enable) {
disable_irq(pdata->irq);
pdata->irq_enable = false;
}
}
__raw_writel(lp_cr, ioaddr + SRTC_LPCR);
out:
spin_unlock_irqrestore(&rtc_lock, lock_flags);
rtc_write_sync_lp(ioaddr);
return ret;
}
int rtc_internal_set(u32 time){
int ret;
u32 lp_cr;
u64 old_time_47bit, new_time_47bit;
#ifdef DEBUG_RTC
printf("\nSetting time to iMX6...");
#endif
old_time_47bit = (((u64) (__raw_readl(SNVS_BASE_ADDR + SNVS_LPSRTCMR) &
((0x1 << CNTR_TO_SECS_SH) - 1)) << 32) |
((u64) __raw_readl(SNVS_BASE_ADDR + SNVS_LPSRTCLR)));
/* Disable RTC first */
lp_cr = __raw_readl(SNVS_BASE_ADDR + SNVS_LPCR) & ~SNVS_LPCR_SRTC_ENV;
__raw_writel(lp_cr,SNVS_BASE_ADDR + SNVS_LPCR);
while (__raw_readl(SNVS_BASE_ADDR + SNVS_LPCR) & SNVS_LPCR_SRTC_ENV)
;
/* Write 32-bit time to 47-bit timer, leaving 15 LSBs blank */
__raw_writel(time << CNTR_TO_SECS_SH, SNVS_BASE_ADDR + SNVS_LPSRTCLR);
__raw_writel(time >> (32 - CNTR_TO_SECS_SH), SNVS_BASE_ADDR + SNVS_LPSRTCMR);
/* Enable RTC again */
__raw_writel(lp_cr | SNVS_LPCR_SRTC_ENV, SNVS_BASE_ADDR + SNVS_LPCR);
while (!(__raw_readl(SNVS_BASE_ADDR + SNVS_LPCR) & SNVS_LPCR_SRTC_ENV))
;
rtc_write_sync_lp();
new_time_47bit = (((u64) (__raw_readl(SNVS_BASE_ADDR + SNVS_LPSRTCMR) &
((0x1 << CNTR_TO_SECS_SH) - 1)) << 32) |
((u64) __raw_readl(SNVS_BASE_ADDR + SNVS_LPSRTCLR)));
#ifdef DEBUG_RTC
printf("Done!\n");
#endif
return 0;
}
/*!
* This function is the RTC interrupt service routine.
*
* @param irq RTC IRQ number
* @param dev_id device ID which is not used
*
* @return IRQ_HANDLED as defined in the include/linux/interrupt.h file.
*/
static irqreturn_t mxc_rtc_interrupt(int irq, void *dev_id)
{
struct platform_device *pdev = dev_id;
struct rtc_drv_data *pdata = platform_get_drvdata(pdev);
void __iomem *ioaddr = pdata->ioaddr;
u32 lp_status, lp_cr;
u32 events = 0;
lp_status = __raw_readl(ioaddr + SRTC_LPSR);
lp_cr = __raw_readl(ioaddr + SRTC_LPCR);
/* update irq data & counter */
if (lp_status & SRTC_LPSR_ALP) {
if (lp_cr & SRTC_LPCR_ALP)
events |= (RTC_AF | RTC_IRQF);
/* disable further lp alarm interrupts */
lp_cr &= ~(SRTC_LPCR_ALP | SRTC_LPCR_WAE);
}
/* Update interrupt enables */
__raw_writel(lp_cr, ioaddr + SRTC_LPCR);
/* If no interrupts are enabled, turn off interrupts in kernel */
if (((lp_cr & SRTC_LPCR_ALL_INT_EN) == 0) && (pdata->irq_enable)) {
disable_irq_nosync(pdata->irq);
pdata->irq_enable = false;
}
/* clear interrupt status */
__raw_writel(lp_status, ioaddr + SRTC_LPSR);
rtc_write_sync_lp(ioaddr);
rtc_update_irq(pdata->rtc, 1, events);
return IRQ_HANDLED;
}
