static int davinci_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
struct davinci_rtc *davinci_rtc = dev_get_drvdata(dev);
u16 days;
u8 rtc_cctrl;
unsigned long flags;
if (convert2days(&days, tm) < 0)
return -EINVAL;
spin_lock_irqsave(&davinci_rtc_lock, flags);
davinci_rtcss_calendar_wait(davinci_rtc);
rtcss_write(davinci_rtc, bin2bcd(tm->tm_sec), PRTCSS_RTC_SEC);
davinci_rtcss_calendar_wait(davinci_rtc);
rtcss_write(davinci_rtc, bin2bcd(tm->tm_min), PRTCSS_RTC_MIN);
davinci_rtcss_calendar_wait(davinci_rtc);
rtcss_write(davinci_rtc, bin2bcd(tm->tm_hour), PRTCSS_RTC_HOUR);
davinci_rtcss_calendar_wait(davinci_rtc);
rtcss_write(davinci_rtc, days & 0xFF, PRTCSS_RTC_DAY0);
davinci_rtcss_calendar_wait(davinci_rtc);
rtcss_write(davinci_rtc, (days & 0xFF00) >> 8, PRTCSS_RTC_DAY1);
rtc_cctrl = rtcss_read(davinci_rtc, PRTCSS_RTC_CCTRL);
rtc_cctrl |= PRTCSS_RTC_CCTRL_CAEN;
rtcss_write(davinci_rtc, rtc_cctrl, PRTCSS_RTC_CCTRL);
spin_unlock_irqrestore(&davinci_rtc_lock, flags);
return 0;
}
static int __init davinci_rtc_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct davinci_rtc *davinci_rtc;
struct resource *res;
int ret = 0;
davinci_rtc = devm_kzalloc(&pdev->dev, sizeof(struct davinci_rtc), GFP_KERNEL);
if (!davinci_rtc)
return -ENOMEM;
davinci_rtc->irq = platform_get_irq(pdev, 0);
if (davinci_rtc->irq < 0) {
dev_err(dev, "no RTC irq\n");
return davinci_rtc->irq;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
davinci_rtc->base = devm_ioremap_resource(dev, res);
if (IS_ERR(davinci_rtc->base))
return PTR_ERR(davinci_rtc->base);
platform_set_drvdata(pdev, davinci_rtc);
davinci_rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
&davinci_rtc_ops, THIS_MODULE);
if (IS_ERR(davinci_rtc->rtc)) {
dev_err(dev, "unable to register RTC device, err %d\n",
ret);
return PTR_ERR(davinci_rtc->rtc);
}
rtcif_write(davinci_rtc, PRTCIF_INTFLG_RTCSS, PRTCIF_INTFLG);
rtcif_write(davinci_rtc, 0, PRTCIF_INTEN);
rtcss_write(davinci_rtc, 0, PRTCSS_RTC_INTC_EXTENA1);
rtcss_write(davinci_rtc, 0, PRTCSS_RTC_CTRL);
rtcss_write(davinci_rtc, 0, PRTCSS_RTC_CCTRL);
ret = devm_request_irq(dev, davinci_rtc->irq, davinci_rtc_interrupt,
0, "davinci_rtc", davinci_rtc);
if (ret < 0) {
dev_err(dev, "unable to register davinci RTC interrupt\n");
return ret;
}
/* Enable interrupts */
rtcif_write(davinci_rtc, PRTCIF_INTEN_RTCSS, PRTCIF_INTEN);
rtcss_write(davinci_rtc, PRTCSS_RTC_INTC_EXTENA1_MASK,
PRTCSS_RTC_INTC_EXTENA1);
rtcss_write(davinci_rtc, PRTCSS_RTC_CCTRL_CAEN, PRTCSS_RTC_CCTRL);
device_init_wakeup(&pdev->dev, 0);
return 0;
}
static int davinci_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
{
struct davinci_rtc *davinci_rtc = dev_get_drvdata(dev);
unsigned long flags;
u16 days;
if (alm->time.tm_mday <= 0 && alm->time.tm_mon < 0
&& alm->time.tm_year < 0) {
struct rtc_time tm;
unsigned long now, then;
davinci_rtc_read_time(dev, &tm);
rtc_tm_to_time(&tm, &now);
alm->time.tm_mday = tm.tm_mday;
alm->time.tm_mon = tm.tm_mon;
alm->time.tm_year = tm.tm_year;
rtc_tm_to_time(&alm->time, &then);
if (then < now) {
rtc_time_to_tm(now + 24 * 60 * 60, &tm);
alm->time.tm_mday = tm.tm_mday;
alm->time.tm_mon = tm.tm_mon;
alm->time.tm_year = tm.tm_year;
}
}
if (convert2days(&days, &alm->time) < 0)
return -EINVAL;
spin_lock_irqsave(&davinci_rtc_lock, flags);
davinci_rtcss_calendar_wait(davinci_rtc);
rtcss_write(davinci_rtc, bin2bcd(alm->time.tm_min), PRTCSS_RTC_AMIN);
davinci_rtcss_calendar_wait(davinci_rtc);
rtcss_write(davinci_rtc, bin2bcd(alm->time.tm_hour), PRTCSS_RTC_AHOUR);
davinci_rtcss_calendar_wait(davinci_rtc);
rtcss_write(davinci_rtc, days & 0xFF, PRTCSS_RTC_ADAY0);
davinci_rtcss_calendar_wait(davinci_rtc);
rtcss_write(davinci_rtc, (days & 0xFF00) >> 8, PRTCSS_RTC_ADAY1);
spin_unlock_irqrestore(&davinci_rtc_lock, flags);
return 0;
}
static int davinci_rtc_alarm_irq_enable(struct device *dev,
unsigned int enabled)
{
struct davinci_rtc *davinci_rtc = dev_get_drvdata(dev);
unsigned long flags;
u8 rtc_cctrl = rtcss_read(davinci_rtc, PRTCSS_RTC_CCTRL);
spin_lock_irqsave(&davinci_rtc_lock, flags);
if (enabled)
rtc_cctrl |= PRTCSS_RTC_CCTRL_DAEN |
PRTCSS_RTC_CCTRL_HAEN |
PRTCSS_RTC_CCTRL_MAEN |
PRTCSS_RTC_CCTRL_ALMFLG |
PRTCSS_RTC_CCTRL_AIEN;
else
rtc_cctrl &= ~PRTCSS_RTC_CCTRL_AIEN;
davinci_rtcss_calendar_wait(davinci_rtc);
rtcss_write(davinci_rtc, rtc_cctrl, PRTCSS_RTC_CCTRL);
spin_unlock_irqrestore(&davinci_rtc_lock, flags);
return 0;
}
static int
davinci_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
{
struct davinci_rtc *davinci_rtc = dev_get_drvdata(dev);
u8 rtc_ctrl;
unsigned long flags;
int ret = 0;
spin_lock_irqsave(&davinci_rtc_lock, flags);
rtc_ctrl = rtcss_read(davinci_rtc, PRTCSS_RTC_CTRL);
switch (cmd) {
case RTC_WIE_ON:
rtc_ctrl |= PRTCSS_RTC_CTRL_WEN | PRTCSS_RTC_CTRL_WDTFLG;
break;
case RTC_WIE_OFF:
rtc_ctrl &= ~PRTCSS_RTC_CTRL_WEN;
break;
default:
ret = -ENOIOCTLCMD;
}
rtcss_write(davinci_rtc, rtc_ctrl, PRTCSS_RTC_CTRL);
spin_unlock_irqrestore(&davinci_rtc_lock, flags);
return ret;
}
static irqreturn_t davinci_rtc_interrupt(int irq, void *class_dev)
{
struct davinci_rtc *davinci_rtc = class_dev;
unsigned long events = 0;
u32 irq_flg;
u8 alm_irq, tmr_irq;
u8 rtc_ctrl, rtc_cctrl;
int ret = IRQ_NONE;
irq_flg = rtcif_read(davinci_rtc, PRTCIF_INTFLG) &
PRTCIF_INTFLG_RTCSS;
alm_irq = rtcss_read(davinci_rtc, PRTCSS_RTC_CCTRL) &
PRTCSS_RTC_CCTRL_ALMFLG;
tmr_irq = rtcss_read(davinci_rtc, PRTCSS_RTC_CTRL) &
PRTCSS_RTC_CTRL_TMRFLG;
if (irq_flg) {
if (alm_irq) {
events |= RTC_IRQF | RTC_AF;
rtc_cctrl = rtcss_read(davinci_rtc, PRTCSS_RTC_CCTRL);
rtc_cctrl |= PRTCSS_RTC_CCTRL_ALMFLG;
rtcss_write(davinci_rtc, rtc_cctrl, PRTCSS_RTC_CCTRL);
} else if (tmr_irq) {
events |= RTC_IRQF | RTC_PF;
rtc_ctrl = rtcss_read(davinci_rtc, PRTCSS_RTC_CTRL);
rtc_ctrl |= PRTCSS_RTC_CTRL_TMRFLG;
rtcss_write(davinci_rtc, rtc_ctrl, PRTCSS_RTC_CTRL);
}
rtcif_write(davinci_rtc, PRTCIF_INTFLG_RTCSS,
PRTCIF_INTFLG);
rtc_update_irq(davinci_rtc->rtc, 1, events);
ret = IRQ_HANDLED;
}
return ret;
}
static int __init davinci_rtc_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct davinci_rtc *davinci_rtc;
struct resource *res, *mem;
int ret = 0;
davinci_rtc = kzalloc(sizeof(struct davinci_rtc), GFP_KERNEL);
if (!davinci_rtc) {
dev_dbg(dev, "could not allocate memory for private data\n");
return -ENOMEM;
}
davinci_rtc->irq = platform_get_irq(pdev, 0);
if (davinci_rtc->irq < 0) {
dev_err(dev, "no RTC irq\n");
ret = davinci_rtc->irq;
goto fail1;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(dev, "no mem resource\n");
ret = -EINVAL;
goto fail1;
}
davinci_rtc->pbase = res->start;
davinci_rtc->base_size = resource_size(res);
mem = request_mem_region(davinci_rtc->pbase, davinci_rtc->base_size,
pdev->name);
if (!mem) {
dev_err(dev, "RTC registers at %08x are not free\n",
davinci_rtc->pbase);
ret = -EBUSY;
goto fail1;
}
davinci_rtc->base = ioremap(davinci_rtc->pbase, davinci_rtc->base_size);
if (!davinci_rtc->base) {
dev_err(dev, "unable to ioremap MEM resource\n");
ret = -ENOMEM;
goto fail2;
}
platform_set_drvdata(pdev, davinci_rtc);
davinci_rtc->rtc = rtc_device_register(pdev->name, &pdev->dev,
&davinci_rtc_ops, THIS_MODULE);
if (IS_ERR(davinci_rtc->rtc)) {
dev_err(dev, "unable to register RTC device, err %ld\n",
PTR_ERR(davinci_rtc->rtc));
goto fail3;
}
rtcif_write(davinci_rtc, PRTCIF_INTFLG_RTCSS, PRTCIF_INTFLG);
rtcif_write(davinci_rtc, 0, PRTCIF_INTEN);
rtcss_write(davinci_rtc, 0, PRTCSS_RTC_INTC_EXTENA1);
rtcss_write(davinci_rtc, 0, PRTCSS_RTC_CTRL);
rtcss_write(davinci_rtc, 0, PRTCSS_RTC_CCTRL);
ret = request_irq(davinci_rtc->irq, davinci_rtc_interrupt,
0, "davinci_rtc", davinci_rtc);
if (ret < 0) {
dev_err(dev, "unable to register davinci RTC interrupt\n");
goto fail4;
}
/* Enable interrupts */
rtcif_write(davinci_rtc, PRTCIF_INTEN_RTCSS, PRTCIF_INTEN);
rtcss_write(davinci_rtc, PRTCSS_RTC_INTC_EXTENA1_MASK,
PRTCSS_RTC_INTC_EXTENA1);
rtcss_write(davinci_rtc, PRTCSS_RTC_CCTRL_CAEN, PRTCSS_RTC_CCTRL);
device_init_wakeup(&pdev->dev, 0);
return 0;
fail4:
rtc_device_unregister(davinci_rtc->rtc);
fail3:
platform_set_drvdata(pdev, NULL);
iounmap(davinci_rtc->base);
fail2:
release_mem_region(davinci_rtc->pbase, davinci_rtc->base_size);
fail1:
kfree(davinci_rtc);
return ret;
}