1 files changed, 18 insertions, 101 deletions

diff --git a/arch/mips/sgi-ip22/ip22-time.c b/arch/mips/sgi-ip22/ip22-time.c
index 173f76805ea..045aa89f28d 100644
--- a/arch/mips/sgi-ip22/ip22-time.c
+++ b/arch/mips/sgi-ip22/ip22-time.c
@@ -7,15 +7,17 @@
  * Ralf Baechle or David S. Miller (sorry guys, i'm really not sure)
  *
  * Copyright (C) 2001 by Ladislav Michl
- * Copyright (C) 2003 Ralf Baechle (ralf@linux-mips.org)
+ * Copyright (C) 2003, 06 Ralf Baechle (ralf@linux-mips.org)
  */
 #include <linux/bcd.h>
-#include <linux/ds1286.h>
+#include <linux/i8253.h>
 #include <linux/init.h>
+#include <linux/irq.h>
 #include <linux/kernel.h>
 #include <linux/interrupt.h>
 #include <linux/kernel_stat.h>
 #include <linux/time.h>
+#include <linux/ftrace.h>
 
 #include <asm/cpu.h>
 #include <asm/mipsregs.h>
@@ -27,67 +29,10 @@
 #include <asm/sgi/hpc3.h>
 #include <asm/sgi/ip22.h>
 
-/*
- * note that mktime uses month from 1 to 12 while to_tm
- * uses 0 to 11.
- */
-static unsigned long indy_rtc_get_time(void)
-{
-	unsigned int yrs, mon, day, hrs, min, sec;
-	unsigned int save_control;
-
-	save_control = hpc3c0->rtcregs[RTC_CMD] & 0xff;
-	hpc3c0->rtcregs[RTC_CMD] = save_control | RTC_TE;
-
-	sec = BCD2BIN(hpc3c0->rtcregs[RTC_SECONDS] & 0xff);
-	min = BCD2BIN(hpc3c0->rtcregs[RTC_MINUTES] & 0xff);
-	hrs = BCD2BIN(hpc3c0->rtcregs[RTC_HOURS] & 0x3f);
-	day = BCD2BIN(hpc3c0->rtcregs[RTC_DATE] & 0xff);
-	mon = BCD2BIN(hpc3c0->rtcregs[RTC_MONTH] & 0x1f);
-	yrs = BCD2BIN(hpc3c0->rtcregs[RTC_YEAR] & 0xff);
-
-	hpc3c0->rtcregs[RTC_CMD] = save_control;
-
-	if (yrs < 45)
-		yrs += 30;
-	if ((yrs += 40) < 70)
-		yrs += 100;
-
-	return mktime(yrs + 1900, mon, day, hrs, min, sec);
-}
-
-static int indy_rtc_set_time(unsigned long tim)
-{
-	struct rtc_time tm;
-	unsigned int save_control;
-
-	to_tm(tim, &tm);
-
-	tm.tm_mon += 1;		/* tm_mon starts at zero */
-	tm.tm_year -= 1940;
-	if (tm.tm_year >= 100)
-		tm.tm_year -= 100;
-
-	save_control = hpc3c0->rtcregs[RTC_CMD] & 0xff;
-	hpc3c0->rtcregs[RTC_CMD] = save_control | RTC_TE;
-
-	hpc3c0->rtcregs[RTC_YEAR] = BIN2BCD(tm.tm_sec);
-	hpc3c0->rtcregs[RTC_MONTH] = BIN2BCD(tm.tm_mon);
-	hpc3c0->rtcregs[RTC_DATE] = BIN2BCD(tm.tm_mday);
-	hpc3c0->rtcregs[RTC_HOURS] = BIN2BCD(tm.tm_hour);
-	hpc3c0->rtcregs[RTC_MINUTES] = BIN2BCD(tm.tm_min);
-	hpc3c0->rtcregs[RTC_SECONDS] = BIN2BCD(tm.tm_sec);
-	hpc3c0->rtcregs[RTC_HUNDREDTH_SECOND] = 0;
-
-	hpc3c0->rtcregs[RTC_CMD] = save_control;
-
-	return 0;
-}
-
 static unsigned long dosample(void)
 {
 	u32 ct0, ct1;
-	volatile u8 msb, lsb;
+	u8 msb;
 
 	/* Start the counter. */
 	sgint->tcword = (SGINT_TCWORD_CNT2 | SGINT_TCWORD_CALL |
@@ -100,33 +45,33 @@ static unsigned long dosample(void)
 
 	/* Latch and spin until top byte of counter2 is zero */
 	do {
-		sgint->tcword = SGINT_TCWORD_CNT2 | SGINT_TCWORD_CLAT;
-		lsb = sgint->tcnt2;
-		msb = sgint->tcnt2;
+		writeb(SGINT_TCWORD_CNT2 | SGINT_TCWORD_CLAT, &sgint->tcword);
+		(void) readb(&sgint->tcnt2);
+		msb = readb(&sgint->tcnt2);
 		ct1 = read_c0_count();
 	} while (msb);
 
 	/* Stop the counter. */
-	sgint->tcword = (SGINT_TCWORD_CNT2 | SGINT_TCWORD_CALL |
-			 SGINT_TCWORD_MSWST);
+	writeb(SGINT_TCWORD_CNT2 | SGINT_TCWORD_CALL | SGINT_TCWORD_MSWST,
+	       &sgint->tcword);
 	/*
 	 * Return the difference, this is how far the r4k counter increments
 	 * for every 1/HZ seconds. We round off the nearest 1 MHz of master
 	 * clock (= 1000000 / HZ / 2).
 	 */
-	/*return (ct1 - ct0 + (500000/HZ/2)) / (500000/HZ) * (500000/HZ);*/
+
 	return (ct1 - ct0) / (500000/HZ) * (500000/HZ);
 }
 
 /*
  * Here we need to calibrate the cycle counter to at least be close.
  */
-static __init void indy_time_init(void)
+__init void plat_time_init(void)
 {
 	unsigned long r4k_ticks[3];
 	unsigned long r4k_tick;
 
-	/* 
+	/*
 	 * Figure out the r4k offset, the algorithm is very simple and works in
 	 * _all_ cases as long as the 8254 counter register itself works ok (as
 	 * an interrupt driving timer it does not because of bug, this is why
@@ -165,50 +110,22 @@ static __init void indy_time_init(void)
 		(int) (r4k_tick % (500000 / HZ)));
 
 	mips_hpt_frequency = r4k_tick * HZ;
+
+	if (ip22_is_fullhouse())
+		setup_pit_timer();
 }
 
 /* Generic SGI handler for (spurious) 8254 interrupts */
-void indy_8254timer_irq(struct pt_regs *regs)
+void __irq_entry indy_8254timer_irq(void)
 {
 	int irq = SGI_8254_0_IRQ;
 	ULONG cnt;
 	char c;
 
 	irq_enter();
-	kstat_this_cpu.irqs[irq]++;
+	kstat_incr_irq_this_cpu(irq);
 	printk(KERN_ALERT "Oops, got 8254 interrupt.\n");
 	ArcRead(0, &c, 1, &cnt);
 	ArcEnterInteractiveMode();
 	irq_exit();
 }
-
-void indy_r4k_timer_interrupt(struct pt_regs *regs)
-{
-	int irq = SGI_TIMER_IRQ;
-
-	irq_enter();
-	kstat_this_cpu.irqs[irq]++;
-	timer_interrupt(irq, NULL, regs);
-	irq_exit();
-}
-
-extern int setup_irq(unsigned int irq, struct irqaction *irqaction);
-
-static void indy_timer_setup(struct irqaction *irq)
-{
-	/* over-write the handler, we use our own way */
-	irq->handler = no_action;
-
-	/* setup irqaction */
-	setup_irq(SGI_TIMER_IRQ, irq);
-}
-
-void __init ip22_time_init(void)
-{
-	/* setup hookup functions */
-	rtc_get_time = indy_rtc_get_time;
-	rtc_set_time = indy_rtc_set_time;
-
-	board_time_init = indy_time_init;
-	board_timer_setup = indy_timer_setup;
-}