tree a922c4cd32eff67262271ee991e1765baa99f52d
parent a79626604bc044cec30bfc6cc3332007588e1a94
author Greg Ungerer <[EMAIL PROTECTED]> Fri, 09 Sep 2005 09:32:14 +1000
committer Linus Torvalds <[EMAIL PROTECTED]> Fri, 09 Sep 2005 07:27:37 -0700
[PATCH] m68knommu: create common timer code for 68x328 processor varients
Create common timer code for all 68x328 processor varients.
Signed-off-by: Greg Ungerer <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
arch/m68knommu/platform/68328/timers.c | 106 +++++++++++++++++++++++++++++++++
1 files changed, 106 insertions(+)
diff --git a/arch/m68knommu/platform/68328/timers.c
b/arch/m68knommu/platform/68328/timers.c
new file mode 100644
--- /dev/null
+++ b/arch/m68knommu/platform/68328/timers.c
@@ -0,0 +1,106 @@
+/***************************************************************************/
+
+/*
+ * linux/arch/m68knommu/platform/68328/timers.c
+ *
+ * Copyright (C) 1993 Hamish Macdonald
+ * Copyright (C) 1999 D. Jeff Dionne
+ * Copyright (C) 2001 Georges Menie, Ken Desmet
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+
+/***************************************************************************/
+
+#include <linux/config.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <asm/setup.h>
+#include <asm/system.h>
+#include <asm/pgtable.h>
+#include <asm/irq.h>
+#include <asm/machdep.h>
+#include <asm/MC68VZ328.h>
+
+/***************************************************************************/
+
+#if defined(CONFIG_DRAGEN2)
+/* with a 33.16 MHz clock, this will give usec resolution to the time
functions */
+#define CLOCK_SOURCE TCTL_CLKSOURCE_SYSCLK
+#define CLOCK_PRE 7
+#define TICKS_PER_JIFFY 41450
+
+#elif defined(CONFIG_XCOPILOT_BUGS)
+/*
+ * The only thing I know is that CLK32 is not available on Xcopilot
+ * I have little idea about what frequency SYSCLK has on Xcopilot.
+ * The values for prescaler and compare registers were simply
+ * taken from the original source
+ */
+#define CLOCK_SOURCE TCTL_CLKSOURCE_SYSCLK
+#define CLOCK_PRE 2
+#define TICKS_PER_JIFFY 0xd7e4
+
+#else
+/* default to using the 32Khz clock */
+#define CLOCK_SOURCE TCTL_CLKSOURCE_32KHZ
+#define CLOCK_PRE 31
+#define TICKS_PER_JIFFY 10
+#endif
+
+/***************************************************************************/
+
+void m68328_timer_init(irqreturn_t (*timer_routine) (int, void *, struct
pt_regs *))
+{
+ /* disable timer 1 */
+ TCTL = 0;
+
+ /* set ISR */
+ if (request_irq(TMR_IRQ_NUM, timer_routine, IRQ_FLG_LOCK, "timer",
NULL))
+ panic("Unable to attach timer interrupt\n");
+
+ /* Restart mode, Enable int, Set clock source */
+ TCTL = TCTL_OM | TCTL_IRQEN | CLOCK_SOURCE;
+ TPRER = CLOCK_PRE;
+ TCMP = TICKS_PER_JIFFY;
+
+ /* Enable timer 1 */
+ TCTL |= TCTL_TEN;
+}
+
+/***************************************************************************/
+
+void m68328_timer_tick(void)
+{
+ /* Reset Timer1 */
+ TSTAT &= 0;
+}
+/***************************************************************************/
+
+unsigned long m68328_timer_gettimeoffset(void)
+{
+ unsigned long ticks = TCN, offset = 0;
+
+ /* check for pending interrupt */
+ if (ticks < (TICKS_PER_JIFFY >> 1) && (ISR & (1 << TMR_IRQ_NUM)))
+ offset = 1000000 / HZ;
+ ticks = (ticks * 1000000 / HZ) / TICKS_PER_JIFFY;
+ return ticks + offset;
+}
+
+/***************************************************************************/
+
+void m68328_timer_gettod(int *year, int *mon, int *day, int *hour, int *min,
int *sec)
+{
+ long now = RTCTIME;
+
+ *year = *mon = *day = 1;
+ *hour = (now >> 24) % 24;
+ *min = (now >> 16) % 60;
+ *sec = now % 60;
+}
+
+/***************************************************************************/
-
To unsubscribe from this list: send the line "unsubscribe git-commits-head" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
