[MIPS] Sibyte: Finish conversion to modern time APIs.
[linux-2.6.git] / arch / mips / sibyte / bcm1480 / time.c
index 5b4bfbb..c730744 100644 (file)
@@ -27,9 +27,8 @@
  */
 #include <linux/clockchips.h>
 #include <linux/interrupt.h>
-#include <linux/sched.h>
+#include <linux/percpu.h>
 #include <linux/spinlock.h>
-#include <linux/kernel_stat.h>
 
 #include <asm/irq.h>
 #include <asm/addrspace.h>
@@ -101,25 +100,36 @@ static void sibyte_set_mode(enum clock_event_mode mode,
                break;
 
        case CLOCK_EVT_MODE_UNUSED:     /* shuddup gcc */
+       case CLOCK_EVT_MODE_RESUME:
                ;
        }
 }
 
-struct clock_event_device sibyte_hpt_clockevent = {
-       .name           = "bcm1480-counter",
-       .features       = CLOCK_EVT_FEAT_PERIODIC,
-       .set_mode       = sibyte_set_mode,
-       .shift          = 32,
-       .irq            = 0,
-};
+static int sibyte_next_event(unsigned long delta, struct clock_event_device *cd)
+{
+       unsigned int cpu = smp_processor_id();
+       void __iomem *timer_init;
+       unsigned int cnt;
+       int res;
+
+       timer_init = IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_INIT));
+       cnt = __raw_readq(timer_init);
+       cnt += delta;
+       __raw_writeq(cnt, timer_init);
+       res = ((long)(__raw_readq(timer_init) - cnt ) > 0) ? -ETIME : 0;
+
+       return res;
+}
+
+static DEFINE_PER_CPU(struct clock_event_device, sibyte_hpt_clockevent);
 
 static irqreturn_t sibyte_counter_handler(int irq, void *dev_id)
 {
-       struct clock_event_device *cd = &sibyte_hpt_clockevent;
        unsigned int cpu = smp_processor_id();
+       struct clock_event_device *cd = &per_cpu(sibyte_hpt_clockevent, cpu);
 
        /* Reset the timer */
-       __raw_writeq(M_SCD_TIMER_ENABLE|M_SCD_TIMER_MODE_CONTINUOUS,
+       __raw_writeq(M_SCD_TIMER_ENABLE | M_SCD_TIMER_MODE_CONTINUOUS,
                     IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG)));
        cd->event_handler(cd);
 
@@ -140,24 +150,21 @@ static struct irqaction sibyte_counter_irqaction = {
  * called directly from irq_handler.S when IP[4] is set during an
  * interrupt
  */
-static void __init sb1480_clockevent_init(void)
+void __cpuinit sb1480_clockevent_init(void)
 {
        unsigned int cpu = smp_processor_id();
        unsigned int irq = K_BCM1480_INT_TIMER_0 + cpu;
+       struct clock_event_device *cd = &per_cpu(sibyte_hpt_clockevent, cpu);
 
-       setup_irq(irq, &sibyte_counter_irqaction);
-}
+       cd->name                = "bcm1480-counter";
+       cd->features            = CLOCK_EVT_FEAT_PERIODIC |
+                                 CLOCK_EVT_MODE_ONESHOT;
+       cd->set_next_event      = sibyte_next_event;
+       cd->set_mode            = sibyte_set_mode;
+       cd->irq                 = irq;
+       clockevent_set_clock(cd, BCM1480_HPT_VALUE);
 
-void bcm1480_timer_interrupt(void)
-{
-       int cpu = smp_processor_id();
-       int irq = K_BCM1480_INT_TIMER_0 + cpu;
-
-       /* Reset the timer */
-       __raw_writeq(M_SCD_TIMER_ENABLE|M_SCD_TIMER_MODE_CONTINUOUS,
-             IOADDR(A_SCD_TIMER_REGISTER(cpu, R_SCD_TIMER_CFG)));
-
-       ll_timer_interrupt(irq);
+       setup_irq(irq, &sibyte_counter_irqaction);
 }
 
 static cycle_t bcm1480_hpt_read(void)
@@ -168,9 +175,26 @@ static cycle_t bcm1480_hpt_read(void)
        return (jiffies + 1) * (BCM1480_HPT_VALUE / HZ) - count;
 }
 
+struct clocksource bcm1480_clocksource = {
+       .name   = "MIPS",
+       .rating = 200,
+       .read   = bcm1480_hpt_read,
+       .mask   = CLOCKSOURCE_MASK(32),
+       .shift  = 32,
+       .flags  = CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
+void __init sb1480_clocksource_init(void)
+{
+       struct clocksource *cs = &bcm1480_clocksource;
+
+       clocksource_set_clock(cs, BCM1480_HPT_VALUE);
+       clocksource_register(cs);
+}
+
 void __init bcm1480_hpt_setup(void)
 {
-       clocksource_mips.read = bcm1480_hpt_read;
        mips_hpt_frequency = BCM1480_HPT_VALUE;
+       sb1480_clocksource_init();
        sb1480_clockevent_init();
 }