integratorcp: split timer support

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Peter Pearse <peter.pearse@arm.com>

3 files changed, 180 insertions, 141 deletions

diff --git a/board/armltd/integratorcp/Makefile b/board/armltd/integratorcp/Makefile
index 92a1a07..5e3c646 100644
--- a/board/armltd/integratorcp/Makefile
+++ b/board/armltd/integratorcp/Makefile
@@ -25,9 +25,12 @@ include $(TOPDIR)/config.mk
 
 LIB	= $(obj)lib$(BOARD).a
 
-COBJS	:= integratorcp.o flash.o
 SOBJS	:= lowlevel_init.o
 
+COBJS	:= integratorcp.o
+COBJS	+= flash.o
+COBJS	+= timer.o
+
 SRCS	:= $(SOBJS:.o=.S) $(COBJS:.o=.c)
 OBJS	:= $(addprefix $(obj),$(COBJS))
 SOBJS	:= $(addprefix $(obj),$(SOBJS))
diff --git a/board/armltd/integratorcp/integratorcp.c b/board/armltd/integratorcp/integratorcp.c
index 0d3afd8..16620bb 100644
--- a/board/armltd/integratorcp/integratorcp.c
+++ b/board/armltd/integratorcp/integratorcp.c
@@ -34,7 +34,6 @@
  */
 
 #include <common.h>
-#include <div64.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -138,142 +137,3 @@ extern void dram_query(void);
 
 	return 0;
 }
-
-/* The Integrator/CP timer1 is clocked at 1MHz
- * can be divided by 16 or 256
- * and can be set up as a 32-bit timer
- */
-/* U-Boot expects a 32 bit timer, running at CONFIG_SYS_HZ */
-/* Keep total timer count to avoid losing decrements < div_timer */
-static unsigned long long total_count = 0;
-static unsigned long long lastdec;	 /* Timer reading at last call	   */
-static unsigned long long div_clock = 1; /* Divisor applied to timer clock */
-static unsigned long long div_timer = 1; /* Divisor to convert timer reading
-					  * change to U-Boot ticks
-					  */
-/* CONFIG_SYS_HZ = CONFIG_SYS_HZ_CLOCK/(div_clock * div_timer) */
-static ulong timestamp;		/* U-Boot ticks since startup	      */
-
-#define TIMER_LOAD_VAL ((ulong)0xFFFFFFFF)
-#define READ_TIMER (*(volatile ulong *)(CONFIG_SYS_TIMERBASE+4))
-
-/* all function return values in U-Boot ticks i.e. (1/CONFIG_SYS_HZ) sec
- *  - unless otherwise stated
- */
-
-/* starts up a counter
- * - the Integrator/CP timer can be set up to issue an interrupt */
-int timer_init (void)
-{
-	/* Load timer with initial value */
-	*(volatile ulong *)(CONFIG_SYS_TIMERBASE + 0) = TIMER_LOAD_VAL;
-	/* Set timer to be
-	 *	enabled		  1
-	 *	periodic	  1
-	 *	no interrupts	  0
-	 *	X		  0
-	 *	divider 1	 00 == less rounding error
-	 *	32 bit		  1
-	 *	wrapping	  0
-	 */
-	*(volatile ulong *)(CONFIG_SYS_TIMERBASE + 8) = 0x000000C2;
-	/* init the timestamp */
-	total_count = 0ULL;
-	reset_timer_masked();
-
-	div_timer  = (unsigned long long)(CONFIG_SYS_HZ_CLOCK / CONFIG_SYS_HZ);
-	div_timer /= div_clock;
-
-	return (0);
-}
-
-/*
- * timer without interrupts
- */
-void reset_timer (void)
-{
-	reset_timer_masked ();
-}
-
-ulong get_timer (ulong base_ticks)
-{
-	return get_timer_masked () - base_ticks;
-}
-
-void set_timer (ulong ticks)
-{
-	timestamp   = ticks;
-	total_count = (unsigned long long)ticks * div_timer;
-}
-
-/* delay usec useconds */
-void udelay (unsigned long usec)
-{
-	ulong tmo, tmp;
-
-	/* Convert to U-Boot ticks */
-	tmo  = usec * CONFIG_SYS_HZ;
-	tmo /= (1000000L);
-
-	tmp  = get_timer_masked();	/* get current timestamp */
-	tmo += tmp;			/* form target timestamp */
-
-	while (get_timer_masked () < tmo) {/* loop till event */
-		/*NOP*/;
-	}
-}
-
-void reset_timer_masked (void)
-{
-	/* capure current decrementer value    */
-	lastdec	  = (unsigned long long)READ_TIMER;
-	/* start "advancing" time stamp from 0 */
-	timestamp = 0L;
-}
-
-/* converts the timer reading to U-Boot ticks	       */
-/* the timestamp is the number of ticks since reset    */
-ulong get_timer_masked (void)
-{
-	/* get current count */
-	unsigned long long now = (unsigned long long)READ_TIMER;
-
-	if(now > lastdec) {
-		/* Must have wrapped */
-		total_count += lastdec + TIMER_LOAD_VAL + 1 - now;
-	} else {
-		total_count += lastdec - now;
-	}
-	lastdec	  = now;
-
-	/* Reuse "now" */
-	now = total_count;
-	do_div(now, div_timer);
-	timestamp = now;
-
-	return timestamp;
-}
-
-/* waits specified delay value and resets timestamp */
-void udelay_masked (unsigned long usec)
-{
-	udelay(usec);
-}
-
-/*
- * This function is derived from PowerPC code (read timebase as long long).
- * On ARM it just returns the timer value.
- */
-unsigned long long get_ticks(void)
-{
-	return (unsigned long long)get_timer(0);
-}
-
-/*
- * Return the timebase clock frequency
- * i.e. how often the timer decrements
- */
-ulong get_tbclk (void)
-{
-	return (ulong)(((unsigned long long)CONFIG_SYS_HZ_CLOCK)/div_clock);
-}
diff --git a/board/armltd/integratorcp/timer.c b/board/armltd/integratorcp/timer.c
new file mode 100644
index 0000000..741035c
--- /dev/null
+++ b/board/armltd/integratorcp/timer.c
@@ -0,0 +1,176 @@
+/*
+ * (C) Copyright 2002
+ * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
+ * Marius Groeger <mgroeger@sysgo.de>
+ *
+ * (C) Copyright 2002
+ * David Mueller, ELSOFT AG, <d.mueller@elsoft.ch>
+ *
+ * (C) Copyright 2003
+ * Texas Instruments, <www.ti.com>
+ * Kshitij Gupta <Kshitij@ti.com>
+ *
+ * (C) Copyright 2004
+ * ARM Ltd.
+ * Philippe Robin, <philippe.robin@arm.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#include <common.h>
+#include <div64.h>
+
+/* The Integrator/CP timer1 is clocked at 1MHz
+ * can be divided by 16 or 256
+ * and can be set up as a 32-bit timer
+ */
+/* U-Boot expects a 32 bit timer, running at CONFIG_SYS_HZ */
+/* Keep total timer count to avoid losing decrements < div_timer */
+static unsigned long long total_count = 0;
+static unsigned long long lastdec;	 /* Timer reading at last call	   */
+static unsigned long long div_clock = 1; /* Divisor applied to timer clock */
+static unsigned long long div_timer = 1; /* Divisor to convert timer reading
+					  * change to U-Boot ticks
+					  */
+/* CONFIG_SYS_HZ = CONFIG_SYS_HZ_CLOCK/(div_clock * div_timer) */
+static ulong timestamp;		/* U-Boot ticks since startup	      */
+
+#define TIMER_LOAD_VAL ((ulong)0xFFFFFFFF)
+#define READ_TIMER (*(volatile ulong *)(CONFIG_SYS_TIMERBASE+4))
+
+/* all function return values in U-Boot ticks i.e. (1/CONFIG_SYS_HZ) sec
+ *  - unless otherwise stated
+ */
+
+/* starts up a counter
+ * - the Integrator/CP timer can be set up to issue an interrupt */
+int timer_init (void)
+{
+	/* Load timer with initial value */
+	*(volatile ulong *)(CONFIG_SYS_TIMERBASE + 0) = TIMER_LOAD_VAL;
+	/* Set timer to be
+	 *	enabled		  1
+	 *	periodic	  1
+	 *	no interrupts	  0
+	 *	X		  0
+	 *	divider 1	 00 == less rounding error
+	 *	32 bit		  1
+	 *	wrapping	  0
+	 */
+	*(volatile ulong *)(CONFIG_SYS_TIMERBASE + 8) = 0x000000C2;
+	/* init the timestamp */
+	total_count = 0ULL;
+	reset_timer_masked();
+
+	div_timer  = (unsigned long long)(CONFIG_SYS_HZ_CLOCK / CONFIG_SYS_HZ);
+	div_timer /= div_clock;
+
+	return (0);
+}
+
+/*
+ * timer without interrupts
+ */
+void reset_timer (void)
+{
+	reset_timer_masked ();
+}
+
+ulong get_timer (ulong base_ticks)
+{
+	return get_timer_masked () - base_ticks;
+}
+
+void set_timer (ulong ticks)
+{
+	timestamp   = ticks;
+	total_count = (unsigned long long)ticks * div_timer;
+}
+
+/* delay usec useconds */
+void udelay (unsigned long usec)
+{
+	ulong tmo, tmp;
+
+	/* Convert to U-Boot ticks */
+	tmo  = usec * CONFIG_SYS_HZ;
+	tmo /= (1000000L);
+
+	tmp  = get_timer_masked();	/* get current timestamp */
+	tmo += tmp;			/* form target timestamp */
+
+	while (get_timer_masked () < tmo) {/* loop till event */
+		/*NOP*/;
+	}
+}
+
+void reset_timer_masked (void)
+{
+	/* capure current decrementer value    */
+	lastdec	  = (unsigned long long)READ_TIMER;
+	/* start "advancing" time stamp from 0 */
+	timestamp = 0L;
+}
+
+/* converts the timer reading to U-Boot ticks	       */
+/* the timestamp is the number of ticks since reset    */
+ulong get_timer_masked (void)
+{
+	/* get current count */
+	unsigned long long now = (unsigned long long)READ_TIMER;
+
+	if(now > lastdec) {
+		/* Must have wrapped */
+		total_count += lastdec + TIMER_LOAD_VAL + 1 - now;
+	} else {
+		total_count += lastdec - now;
+	}
+	lastdec	  = now;
+
+	/* Reuse "now" */
+	now = total_count;
+	do_div(now, div_timer);
+	timestamp = now;
+
+	return timestamp;
+}
+
+/* waits specified delay value and resets timestamp */
+void udelay_masked (unsigned long usec)
+{
+	udelay(usec);
+}
+
+/*
+ * This function is derived from PowerPC code (read timebase as long long).
+ * On ARM it just returns the timer value.
+ */
+unsigned long long get_ticks(void)
+{
+	return (unsigned long long)get_timer(0);
+}
+
+/*
+ * Return the timebase clock frequency
+ * i.e. how often the timer decrements
+ */
+ulong get_tbclk (void)
+{
+	return (ulong)(((unsigned long long)CONFIG_SYS_HZ_CLOCK)/div_clock);
+}