#include <linux/kernel.h>
#include <linux/interrupt.h>
+#include <linux/module.h>
#include <asm/geode.h>
static struct mfgpt_timer_t {
/* The following udocumented bit resets the MFGPT timers */
val = 0xFF; dummy = 0;
- wrmsr(0x5140002B, val, dummy);
+ wrmsr(MSR_MFGPT_SETUP, val, dummy);
return 1;
}
__setup("mfgptfix", mfgpt_fix);
* 6; that is, resets for 7 and 8 will be ignored. Is this
* a problem? -dilinger
*/
- msr = MFGPT_NR_MSR;
+ msr = MSR_MFGPT_NR;
mask = 1 << (timer + 24);
break;
case MFGPT_EVENT_NMI:
- msr = MFGPT_NR_MSR;
+ msr = MSR_MFGPT_NR;
mask = 1 << (timer + shift);
break;
case MFGPT_EVENT_IRQ:
- msr = MFGPT_IRQ_MSR;
+ msr = MSR_MFGPT_IRQ;
mask = 1 << (timer + shift);
break;
wrmsr(msr, value, dummy);
return 0;
}
+EXPORT_SYMBOL_GPL(geode_mfgpt_toggle_event);
int geode_mfgpt_set_irq(int timer, int cmp, int irq, int enable)
{
/* No timers available - too bad */
return -1;
}
+EXPORT_SYMBOL_GPL(geode_mfgpt_alloc_timer);
#ifdef CONFIG_GEODE_MFGPT_TIMER
static void mfgpt_disable_timer(u16 clock)
{
- u16 val = geode_mfgpt_read(clock, MFGPT_REG_SETUP);
- geode_mfgpt_write(clock, MFGPT_REG_SETUP, val & ~MFGPT_SETUP_CNTEN);
+ /* avoid races by clearing CMP1 and CMP2 unconditionally */
+ geode_mfgpt_write(clock, MFGPT_REG_SETUP, (u16) ~MFGPT_SETUP_CNTEN |
+ MFGPT_SETUP_CMP1 | MFGPT_SETUP_CMP2);
}
static int mfgpt_next_event(unsigned long, struct clock_event_device *);
return 0;
}
-/* Assume (foolishly?), that this interrupt was due to our tick */
-
static irqreturn_t mfgpt_tick(int irq, void *dev_id)
{
+ u16 val = geode_mfgpt_read(mfgpt_event_clock, MFGPT_REG_SETUP);
+
+ /* See if the interrupt was for us */
+ if (!(val & (MFGPT_SETUP_SETUP | MFGPT_SETUP_CMP2 | MFGPT_SETUP_CMP1)))
+ return IRQ_NONE;
+
/* Turn off the clock (and clear the event) */
mfgpt_disable_timer(mfgpt_event_clock);
geode_mfgpt_write(mfgpt_event_clock, MFGPT_REG_SETUP, val);
/* Set up the clock event */
- mfgpt_clockevent.mult = div_sc(MFGPT_HZ, NSEC_PER_SEC, 32);
+ mfgpt_clockevent.mult = div_sc(MFGPT_HZ, NSEC_PER_SEC,
+ mfgpt_clockevent.shift);
mfgpt_clockevent.min_delta_ns = clockevent_delta2ns(0xF,
&mfgpt_clockevent);
mfgpt_clockevent.max_delta_ns = clockevent_delta2ns(0xFFFE,
&mfgpt_clockevent);
printk(KERN_INFO
- "mfgpt-timer: registering the MFGT timer as a clock event.\n");
+ "mfgpt-timer: registering the MFGPT timer as a clock event.\n");
clockevents_register_device(&mfgpt_clockevent);
return 0;