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authorLeo Chen <leochen@broadcom.com>2009-08-07 20:01:47 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2009-08-15 16:01:41 +0100
commit34559125742645843bc7639900c7b4737ec12b72 (patch)
tree671f6a7fcd53e82bb29d620edf5739f4e8c5d0f7 /arch
parent859277f7dbf8b48016d55ea2171d04eed074d858 (diff)
ARM: 5649/1: bcmring: add bcmring timer function
bcmring timer helper function, hardware register headers Signed-off-by: Leo Chen <leochen@broadcom.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-bcmring/include/mach/timer.h77
-rw-r--r--arch/arm/mach-bcmring/include/mach/timex.h25
-rw-r--r--arch/arm/mach-bcmring/timer.c62
3 files changed, 164 insertions, 0 deletions
diff --git a/arch/arm/mach-bcmring/include/mach/timer.h b/arch/arm/mach-bcmring/include/mach/timer.h
new file mode 100644
index 00000000000..5a94bbb032b
--- /dev/null
+++ b/arch/arm/mach-bcmring/include/mach/timer.h
@@ -0,0 +1,77 @@
+/*****************************************************************************
+* Copyright 2004 - 2008 Broadcom Corporation. All rights reserved.
+*
+* Unless you and Broadcom execute a separate written software license
+* agreement governing use of this software, this software is licensed to you
+* under the terms of the GNU General Public License version 2, available at
+* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
+*
+* Notwithstanding the above, under no circumstances may you combine this
+* software in any way with any other Broadcom software provided under a
+* license other than the GPL, without Broadcom's express prior written
+* consent.
+*****************************************************************************/
+
+/*
+*
+*****************************************************************************
+*
+* timer.h
+*
+* PURPOSE:
+*
+*
+*
+* NOTES:
+*
+*****************************************************************************/
+
+#if !defined(BCM_LINUX_TIMER_H)
+#define BCM_LINUX_TIMER_H
+
+#if defined(__KERNEL__)
+
+/* ---- Include Files ---------------------------------------------------- */
+/* ---- Constants and Types ---------------------------------------------- */
+
+typedef unsigned int timer_tick_count_t;
+typedef unsigned int timer_tick_rate_t;
+typedef unsigned int timer_msec_t;
+
+/* ---- Variable Externs ------------------------------------------------- */
+/* ---- Function Prototypes ---------------------------------------------- */
+
+/****************************************************************************
+*
+* timer_get_tick_count
+*
+*
+***************************************************************************/
+timer_tick_count_t timer_get_tick_count(void);
+
+/****************************************************************************
+*
+* timer_get_tick_rate
+*
+*
+***************************************************************************/
+timer_tick_rate_t timer_get_tick_rate(void);
+
+/****************************************************************************
+*
+* timer_get_msec
+*
+*
+***************************************************************************/
+timer_msec_t timer_get_msec(void);
+
+/****************************************************************************
+*
+* timer_ticks_to_msec
+*
+*
+***************************************************************************/
+timer_msec_t timer_ticks_to_msec(timer_tick_count_t ticks);
+
+#endif /* __KERNEL__ */
+#endif /* BCM_LINUX_TIMER_H */
diff --git a/arch/arm/mach-bcmring/include/mach/timex.h b/arch/arm/mach-bcmring/include/mach/timex.h
new file mode 100644
index 00000000000..40d033ec589
--- /dev/null
+++ b/arch/arm/mach-bcmring/include/mach/timex.h
@@ -0,0 +1,25 @@
+/*
+ *
+ * Integrator architecture timex specifications
+ *
+ * Copyright (C) 1999 ARM Limited
+ *
+ * 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
+ */
+
+/*
+ * Specifies the number of ticks per second
+ */
+#define CLOCK_TICK_RATE 100000 /* REG_SMT_TICKS_PER_SEC */
diff --git a/arch/arm/mach-bcmring/timer.c b/arch/arm/mach-bcmring/timer.c
new file mode 100644
index 00000000000..2d415d2a8e6
--- /dev/null
+++ b/arch/arm/mach-bcmring/timer.c
@@ -0,0 +1,62 @@
+/*****************************************************************************
+* Copyright 2003 - 2008 Broadcom Corporation. All rights reserved.
+*
+* Unless you and Broadcom execute a separate written software license
+* agreement governing use of this software, this software is licensed to you
+* under the terms of the GNU General Public License version 2, available at
+* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
+*
+* Notwithstanding the above, under no circumstances may you combine this
+* software in any way with any other Broadcom software provided under a
+* license other than the GPL, without Broadcom's express prior written
+* consent.
+*****************************************************************************/
+
+#include <linux/version.h>
+#include <linux/types.h>
+#include <linux/module.h>
+#include <csp/tmrHw.h>
+
+#include <mach/timer.h>
+/* The core.c file initializes timers 1 and 3 as a linux clocksource. */
+/* The real time clock should probably be the real linux clocksource. */
+/* In the meantime, this file should agree with core.c as to the */
+/* profiling timer. If the clocksource is moved to rtc later, then */
+/* we can init the profiling timer here instead. */
+
+/* Timer 1 provides 25MHz resolution syncrhonized to scheduling and APM timing */
+/* Timer 3 provides bus freqeuncy sychronized to ACLK, but spread spectrum will */
+/* affect synchronization with scheduling and APM timing. */
+
+#define PROF_TIMER 1
+
+timer_tick_rate_t timer_get_tick_rate(void)
+{
+ return tmrHw_getCountRate(PROF_TIMER);
+}
+
+timer_tick_count_t timer_get_tick_count(void)
+{
+ return tmrHw_GetCurrentCount(PROF_TIMER); /* change downcounter to upcounter */
+}
+
+timer_msec_t timer_ticks_to_msec(timer_tick_count_t ticks)
+{
+ static int tickRateMsec;
+
+ if (tickRateMsec == 0) {
+ tickRateMsec = timer_get_tick_rate() / 1000;
+ }
+
+ return ticks / tickRateMsec;
+}
+
+timer_msec_t timer_get_msec(void)
+{
+ return timer_ticks_to_msec(timer_get_tick_count());
+}
+
+EXPORT_SYMBOL(timer_get_tick_count);
+EXPORT_SYMBOL(timer_ticks_to_msec);
+EXPORT_SYMBOL(timer_get_tick_rate);
+EXPORT_SYMBOL(timer_get_msec);