patch-2.2.8 linux/arch/m68k/sun3x/time.c

• Lines: 84
• Date: Tue May 11 09:57:14 1999
• Orig file: v2.2.7/linux/arch/m68k/sun3x/time.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.2.7/linux/arch/m68k/sun3x/time.c linux/arch/m68k/sun3x/time.c
@@ -0,0 +1,83 @@
+/*
+ *  linux/arch/m68k/sun3x/time.c
+ *
+ *  Sun3x-specific time handling
+ */
+
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/kernel_stat.h>
+#include <linux/interrupt.h>
+
+#include <asm/irq.h>
+#include <asm/io.h>
+#include <asm/system.h>
+#include <asm/traps.h>
+#include <asm/sun3x.h>
+
+#include "time.h"
+
+#define M_CONTROL 0xf8
+#define M_SEC     0xf9
+#define M_MIN     0xfa
+#define M_HOUR    0xfb
+#define M_DAY     0xfc
+#define M_DATE    0xfd
+#define M_MONTH   0xfe
+#define M_YEAR    0xff
+
+#define C_WRITE   0x80
+#define C_READ    0x40
+#define C_SIGN    0x20
+#define C_CALIB   0x1f
+
+#define BCD_TO_BIN(val) (((val)&15) + ((val)>>4)*10)
+
+/* Read the Mostek */
+void sun3x_gettod (int *yearp, int *monp, int *dayp,
+                   int *hourp, int *minp, int *secp)
+{
+    volatile unsigned char *eeprom = (unsigned char *)SUN3X_EEPROM;
+
+    /* Stop updates */
+    *(eeprom + M_CONTROL) |= C_READ;
+
+    /* Read values */
+    *yearp = BCD_TO_BIN(*(eeprom + M_YEAR));
+    *monp  = BCD_TO_BIN(*(eeprom + M_MONTH));
+    *dayp  = BCD_TO_BIN(*(eeprom + M_DATE));
+    *hourp = BCD_TO_BIN(*(eeprom + M_HOUR));
+    *minp  = BCD_TO_BIN(*(eeprom + M_MIN));
+    *secp  = BCD_TO_BIN(*(eeprom + M_SEC));
+
+    /* Restart updates */
+    *(eeprom + M_CONTROL) &= ~C_READ;
+}
+
+/* Not much we can do here */
+unsigned long sun3x_gettimeoffset (void)
+{
+    return 0L;
+}
+
+static void sun3x_timer_tick(int irq, void *dev_id, struct pt_regs *regs)
+{
+    void (*vector)(int, void *, struct pt_regs *) = dev_id;
+
+    /* Clear the pending interrupt - pulse the enable line low */
+    disable_irq(5);
+    enable_irq(5);
+    
+    vector(irq, NULL, regs);
+}
+
+__initfunc(void sun3x_sched_init(void (*vector)(int, void *, struct pt_regs *)))
+{
+    sys_request_irq(5, sun3x_timer_tick, IRQ_FLG_STD, "timer tick", vector);
+
+    /* Pulse enable low to get the clock started */
+    disable_irq(5);
+    enable_irq(5);
+}