#include <linux/platform_device.h>
#include <linux/mod_devicetable.h>
+#ifdef CONFIG_HPET_EMULATE_RTC
+#include <asm/hpet.h>
+#endif
+
/* this is for "generic access to PC-style RTC" using CMOS_READ/CMOS_WRITE */
#include <asm-generic/rtc.h>
+#ifndef CONFIG_HPET_EMULATE_RTC
+#define is_hpet_enabled() 0
+#define hpet_set_alarm_time(hrs, min, sec) do { } while (0)
+#define hpet_set_periodic_freq(arg) 0
+#define hpet_mask_rtc_irq_bit(arg) do { } while (0)
+#define hpet_set_rtc_irq_bit(arg) do { } while (0)
+#define hpet_rtc_timer_init() do { } while (0)
+#define hpet_register_irq_handler(h) 0
+#define hpet_unregister_irq_handler(h) do { } while (0)
+extern irqreturn_t hpet_rtc_interrupt(int irq, void *dev_id);
+#endif
struct cmos_rtc {
struct rtc_device *rtc;
/* Writing 0xff means "don't care" or "match all". */
- mon = t->time.tm_mon;
- mon = (mon < 12) ? BIN2BCD(mon) : 0xff;
- mon++;
+ mon = t->time.tm_mon + 1;
+ mon = (mon <= 12) ? BIN2BCD(mon) : 0xff;
mday = t->time.tm_mday;
mday = (mday >= 1 && mday <= 31) ? BIN2BCD(mday) : 0xff;
sec = t->time.tm_sec;
sec = (sec < 60) ? BIN2BCD(sec) : 0xff;
+ hpet_set_alarm_time(t->time.tm_hour, t->time.tm_min, t->time.tm_sec);
spin_lock_irq(&rtc_lock);
/* next rtc irq must not be from previous alarm setting */
f = 16 - f;
spin_lock_irqsave(&rtc_lock, flags);
- CMOS_WRITE(RTC_REF_CLCK_32KHZ | f, RTC_FREQ_SELECT);
+ if (!hpet_set_periodic_freq(freq))
+ CMOS_WRITE(RTC_REF_CLCK_32KHZ | f, RTC_FREQ_SELECT);
spin_unlock_irqrestore(&rtc_lock, flags);
return 0;
switch (cmd) {
case RTC_AIE_OFF: /* alarm off */
rtc_control &= ~RTC_AIE;
+ hpet_mask_rtc_irq_bit(RTC_AIE);
break;
case RTC_AIE_ON: /* alarm on */
rtc_control |= RTC_AIE;
+ hpet_set_rtc_irq_bit(RTC_AIE);
break;
case RTC_UIE_OFF: /* update off */
rtc_control &= ~RTC_UIE;
+ hpet_mask_rtc_irq_bit(RTC_UIE);
break;
case RTC_UIE_ON: /* update on */
rtc_control |= RTC_UIE;
+ hpet_set_rtc_irq_bit(RTC_UIE);
break;
case RTC_PIE_OFF: /* periodic off */
rtc_control &= ~RTC_PIE;
+ hpet_mask_rtc_irq_bit(RTC_PIE);
break;
case RTC_PIE_ON: /* periodic on */
rtc_control |= RTC_PIE;
+ hpet_set_rtc_irq_bit(RTC_PIE);
break;
}
- CMOS_WRITE(rtc_control, RTC_CONTROL);
+ if (!is_hpet_enabled())
+ CMOS_WRITE(rtc_control, RTC_CONTROL);
+
rtc_intr = CMOS_READ(RTC_INTR_FLAGS);
rtc_intr &= (rtc_control & RTC_IRQMASK) | RTC_IRQF;
if (is_intr(rtc_intr))
rtc_update_irq(cmos->rtc, 1, rtc_intr);
+
spin_unlock_irqrestore(&rtc_lock, flags);
return 0;
}
return seq_printf(seq,
"periodic_IRQ\t: %s\n"
"update_IRQ\t: %s\n"
+ "HPET_emulated\t: %s\n"
// "square_wave\t: %s\n"
// "BCD\t\t: %s\n"
"DST_enable\t: %s\n"
"batt_status\t: %s\n",
(rtc_control & RTC_PIE) ? "yes" : "no",
(rtc_control & RTC_UIE) ? "yes" : "no",
+ is_hpet_enabled() ? "yes" : "no",
// (rtc_control & RTC_SQWE) ? "yes" : "no",
// (rtc_control & RTC_DM_BINARY) ? "no" : "yes",
(rtc_control & RTC_DST_EN) ? "yes" : "no",
static irqreturn_t cmos_interrupt(int irq, void *p)
{
u8 irqstat;
+ u8 rtc_control;
spin_lock(&rtc_lock);
- irqstat = CMOS_READ(RTC_INTR_FLAGS);
- irqstat &= (CMOS_READ(RTC_CONTROL) & RTC_IRQMASK) | RTC_IRQF;
+ /*
+ * In this case it is HPET RTC interrupt handler
+ * calling us, with the interrupt information
+ * passed as arg1, instead of irq.
+ */
+ if (is_hpet_enabled())
+ irqstat = (unsigned long)irq & 0xF0;
+ else {
+ irqstat = CMOS_READ(RTC_INTR_FLAGS);
+ rtc_control = CMOS_READ(RTC_CONTROL);
+ irqstat &= (rtc_control & RTC_IRQMASK) | RTC_IRQF;
+ }
+
+ /* All Linux RTC alarms should be treated as if they were oneshot.
+ * Similar code may be needed in system wakeup paths, in case the
+ * alarm woke the system.
+ */
+ if (irqstat & RTC_AIE) {
+ rtc_control = CMOS_READ(RTC_CONTROL);
+ rtc_control &= ~RTC_AIE;
+ CMOS_WRITE(rtc_control, RTC_CONTROL);
+ CMOS_READ(RTC_INTR_FLAGS);
+ }
spin_unlock(&rtc_lock);
if (is_intr(irqstat)) {
* doesn't use 32KHz here ... for portability we might need to
* do something about other clock frequencies.
*/
- CMOS_WRITE(RTC_REF_CLCK_32KHZ | 0x06, RTC_FREQ_SELECT);
cmos_rtc.rtc->irq_freq = 1024;
+ if (!hpet_set_periodic_freq(cmos_rtc.rtc->irq_freq))
+ CMOS_WRITE(RTC_REF_CLCK_32KHZ | 0x06, RTC_FREQ_SELECT);
/* disable irqs.
*
goto cleanup1;
}
- if (is_valid_irq(rtc_irq))
- retval = request_irq(rtc_irq, cmos_interrupt, IRQF_DISABLED,
- cmos_rtc.rtc->dev.bus_id,
+ if (is_valid_irq(rtc_irq)) {
+ irq_handler_t rtc_cmos_int_handler;
+
+ if (is_hpet_enabled()) {
+ int err;
+
+ rtc_cmos_int_handler = hpet_rtc_interrupt;
+ err = hpet_register_irq_handler(cmos_interrupt);
+ if (err != 0) {
+ printk(KERN_WARNING "hpet_register_irq_handler "
+ " failed in rtc_init().");
+ goto cleanup1;
+ }
+ } else
+ rtc_cmos_int_handler = cmos_interrupt;
+
+ retval = request_irq(rtc_irq, rtc_cmos_int_handler,
+ IRQF_DISABLED, cmos_rtc.rtc->dev.bus_id,
cmos_rtc.rtc);
- if (retval < 0) {
- dev_dbg(dev, "IRQ %d is already in use\n", rtc_irq);
- goto cleanup1;
+ if (retval < 0) {
+ dev_dbg(dev, "IRQ %d is already in use\n", rtc_irq);
+ goto cleanup1;
+ }
}
+ hpet_rtc_timer_init();
/* export at least the first block of NVRAM */
nvram.size = address_space - NVRAM_OFFSET;
sysfs_remove_bin_file(&dev->kobj, &nvram);
- if (is_valid_irq(cmos->irq))
+ if (is_valid_irq(cmos->irq)) {
free_irq(cmos->irq, cmos->rtc);
+ hpet_unregister_irq_handler(cmos_interrupt);
+ }
rtc_device_unregister(cmos->rtc);
cmos->rtc = NULL;
* don't define the IRQ. It should always be safe to
* hardcode it in these cases
*/
- return cmos_do_probe(&pnp->dev, &pnp->res.port_resource[0], 8);
+ return cmos_do_probe(&pnp->dev,
+ pnp_get_resource(pnp, IORESOURCE_IO, 0), 8);
else
return cmos_do_probe(&pnp->dev,
- &pnp->res.port_resource[0],
- pnp->res.irq_resource[0].start);
+ pnp_get_resource(pnp, IORESOURCE_IO, 0),
+ pnp_irq(pnp, 0));
}
static void __exit cmos_pnp_remove(struct pnp_dev *pnp)
cmos_do_shutdown();
}
+/* work with hotplug and coldplug */
+MODULE_ALIAS("platform:rtc_cmos");
+
static struct platform_driver cmos_platform_driver = {
.remove = __exit_p(cmos_platform_remove),
.shutdown = cmos_platform_shutdown,
projects / linux-2.6-omap-h63xx.git / blobdiff