MIPS: Lasat: Convert to proc_fops / seq_file

[safe/jmp/linux-2.6] / arch / mips / jazz / irq.c

diff --git a/arch/mips/jazz/irq.c b/arch/mips/jazz/irq.c
index 5623541..7bd32d0 100644 (file)
--- a/arch/mips/jazz/irq.c
+++ b/arch/mips/jazz/irq.c
@@ -4,14 +4,17 @@
  * for more details.
  *
  * Copyright (C) 1992 Linus Torvalds
- * Copyright (C) 1994 - 2001, 2003 Ralf Baechle
+ * Copyright (C) 1994 - 2001, 2003, 07 Ralf Baechle
  */
+#include <linux/clockchips.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/kernel.h>
+#include <linux/smp.h>
 #include <linux/spinlock.h>
 
 #include <asm/irq_cpu.h>
+#include <asm/i8253.h>
 #include <asm/i8259.h>
 #include <asm/io.h>
 #include <asm/jazz.h>
@@ -95,9 +98,10 @@ asmlinkage void plat_irq_dispatch(void)
        if (pending & IE_IRQ4) {
                r4030_read_reg32(JAZZ_TIMER_REGISTER);
                do_IRQ(JAZZ_TIMER_IRQ);
-       } else if (pending & IE_IRQ2)
-               do_IRQ(r4030_read_reg32(JAZZ_EISA_IRQ_ACK));
-       else if (pending & IE_IRQ1) {
+       } else if (pending & IE_IRQ2) {
+               irq = *(volatile u8 *)JAZZ_EISA_IRQ_ACK;
+               do_IRQ(irq);
+       } else if (pending & IE_IRQ1) {
                irq = *(volatile u8 *)JAZZ_IO_IRQ_SOURCE >> 2;
                if (likely(irq > 0))
                        do_IRQ(irq + JAZZ_IRQ_START - 1);
@@ -105,3 +109,54 @@ asmlinkage void plat_irq_dispatch(void)
                        panic("Unimplemented loc_no_irq handler");
        }
 }
+
+static void r4030_set_mode(enum clock_event_mode mode,
+                           struct clock_event_device *evt)
+{
+       /* Nothing to do ...  */
+}
+
+struct clock_event_device r4030_clockevent = {
+       .name           = "r4030",
+       .features       = CLOCK_EVT_FEAT_PERIODIC,
+       .rating         = 300,
+       .irq            = JAZZ_TIMER_IRQ,
+       .set_mode       = r4030_set_mode,
+};
+
+static irqreturn_t r4030_timer_interrupt(int irq, void *dev_id)
+{
+       struct clock_event_device *cd = dev_id;
+
+       cd->event_handler(cd);
+       return IRQ_HANDLED;
+}
+
+static struct irqaction r4030_timer_irqaction = {
+       .handler        = r4030_timer_interrupt,
+       .flags          = IRQF_DISABLED | IRQF_TIMER,
+       .name           = "R4030 timer",
+};
+
+void __init plat_time_init(void)
+{
+       struct clock_event_device *cd = &r4030_clockevent;
+       struct irqaction *action = &r4030_timer_irqaction;
+       unsigned int cpu = smp_processor_id();
+
+       BUG_ON(HZ != 100);
+
+       cd->cpumask             = cpumask_of(cpu);
+       clockevents_register_device(cd);
+       action->dev_id = cd;
+       setup_irq(JAZZ_TIMER_IRQ, action);
+
+       /*
+        * Set clock to 100Hz.
+        *
+        * The R4030 timer receives an input clock of 1kHz which is divieded by
+        * a programmable 4-bit divider.  This makes it fairly inflexible.
+        */
+       r4030_write_reg32(JAZZ_TIMER_INTERVAL, 9);
+       setup_pit_timer();
+}