arm: timer and interrupt init rework

actually the timer init use the interrupt_init as init callback
which make the interrupt and timer implementation difficult to follow

so now rename it as int timer_init(void) and use interrupt_init for interrupt

btw also remane the corresponding file to the functionnality implemented

as ixp arch implement two timer - one based on interrupt - so all the timer
related code is moved to timer.c

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

1 files changed, 0 insertions, 177 deletions

diff --git a/cpu/arm1176/s3c64xx/interrupts.c b/cpu/arm1176/s3c64xx/interrupts.c
deleted file mode 100644
index 7bb98486c5..0000000000
--- a/cpu/arm1176/s3c64xx/interrupts.c
+++ /dev/null
@@ -1,177 +0,0 @@
-/*
- * (C) Copyright 2003
- * Texas Instruments <www.ti.com>
- *
- * (C) Copyright 2002
- * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
- * Marius Groeger <mgroeger@sysgo.de>
- *
- * (C) Copyright 2002
- * Sysgo Real-Time Solutions, GmbH <www.elinos.com>
- * Alex Zuepke <azu@sysgo.de>
- *
- * (C) Copyright 2002-2004
- * Gary Jennejohn, DENX Software Engineering, <garyj@denx.de>
- *
- * (C) Copyright 2004
- * Philippe Robin, ARM Ltd. <philippe.robin@arm.com>
- *
- * (C) Copyright 2008
- * Guennadi Liakhovetki, DENX Software Engineering, <lg@denx.de>
- *
- * 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 <asm/proc-armv/ptrace.h>
-#include <s3c6400.h>
-#include <div64.h>
-
-static ulong timer_load_val;
-
-#define PRESCALER	167
-
-static s3c64xx_timers *s3c64xx_get_base_timers(void)
-{
-	return (s3c64xx_timers *)ELFIN_TIMER_BASE;
-}
-
-/* macro to read the 16 bit timer */
-static inline ulong read_timer(void)
-{
-	s3c64xx_timers *const timers = s3c64xx_get_base_timers();
-
-	return timers->TCNTO4;
-}
-
-/* Internal tick units */
-/* Last decremneter snapshot */
-static unsigned long lastdec;
-/* Monotonic incrementing timer */
-static unsigned long long timestamp;
-
-int interrupt_init(void)
-{
-	s3c64xx_timers *const timers = s3c64xx_get_base_timers();
-
-	/* use PWM Timer 4 because it has no output */
-	/*
-	 * We use the following scheme for the timer:
-	 * Prescaler is hard fixed at 167, divider at 1/4.
-	 * This gives at PCLK frequency 66MHz approx. 10us ticks
-	 * The timer is set to wrap after 100s, at 66MHz this obviously
-	 * happens after 10,000,000 ticks. A long variable can thus
-	 * keep values up to 40,000s, i.e., 11 hours. This should be
-	 * enough for most uses:-) Possible optimizations: select a
-	 * binary-friendly frequency, e.g., 1ms / 128. Also calculate
-	 * the prescaler automatically for other PCLK frequencies.
-	 */
-	timers->TCFG0 = PRESCALER << 8;
-	if (timer_load_val == 0) {
-		timer_load_val = get_PCLK() / PRESCALER * (100 / 4); /* 100s */
-		timers->TCFG1 = (timers->TCFG1 & ~0xf0000) | 0x20000;
-	}
-
-	/* load value for 10 ms timeout */
-	lastdec = timers->TCNTB4 = timer_load_val;
-	/* auto load, manual update of Timer 4 */
-	timers->TCON = (timers->TCON & ~0x00700000) | TCON_4_AUTO |
-		TCON_4_UPDATE;
-
-	/* auto load, start Timer 4 */
-	timers->TCON = (timers->TCON & ~0x00700000) | TCON_4_AUTO | COUNT_4_ON;
-	timestamp = 0;
-
-	return 0;
-}
-
-/*
- * timer without interrupts
- */
-
-/*
- * 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)
-{
-	ulong now = read_timer();
-
-	if (lastdec >= now) {
-		/* normal mode */
-		timestamp += lastdec - now;
-	} else {
-		/* we have an overflow ... */
-		timestamp += lastdec + timer_load_val - now;
-	}
-	lastdec = now;
-
-	return timestamp;
-}
-
-/*
- * This function is derived from PowerPC code (timebase clock frequency).
- * On ARM it returns the number of timer ticks per second.
- */
-ulong get_tbclk(void)
-{
-	/* We overrun in 100s */
-	return (ulong)(timer_load_val / 100);
-}
-
-void reset_timer_masked(void)
-{
-	/* reset time */
-	lastdec = read_timer();
-	timestamp = 0;
-}
-
-void reset_timer(void)
-{
-	reset_timer_masked();
-}
-
-ulong get_timer_masked(void)
-{
-	unsigned long long res = get_ticks();
-	do_div (res, (timer_load_val / (100 * CONFIG_SYS_HZ)));
-	return res;
-}
-
-ulong get_timer(ulong base)
-{
-	return get_timer_masked() - base;
-}
-
-void set_timer(ulong t)
-{
-	timestamp = t * (timer_load_val / (100 * CONFIG_SYS_HZ));
-}
-
-void udelay(unsigned long usec)
-{
-	unsigned long long tmp;
-	ulong tmo;
-
-	tmo = (usec + 9) / 10;
-	tmp = get_ticks() + tmo;	/* get current timestamp */
-
-	while (get_ticks() < tmp)/* loop till event */
-		 /*NOP*/;
-}