diff options
author | Greg Ungerer <gerg@snapgear.com> | 2008-02-01 07:37:36 (GMT) |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-02-01 09:58:10 (GMT) |
commit | 703d01255e650b2f1ff6b2df5345bd481fd094e6 (patch) | |
tree | 7837de34ee0d45a06dd0783e74de918fc6d0bbcc /arch/m68knommu/platform/5307 | |
parent | ad80335a989ddace0969b180d4c417b56f26a254 (diff) | |
download | linux-fsl-qoriq-703d01255e650b2f1ff6b2df5345bd481fd094e6.tar.xz |
m68knommu: move ColdFire pit.c to its own coldfire directory
Move common ColdFire CPU pit.c to common coldfire platform directory.
Currently the common ColdFire CPU family code sits in the
arch/m68knommu/platform/5307 directory. This is confusing, the files
containing this common code are in no way specific to the 5307 ColdFire.
Create an arch/m68knommu/platform/coldfire directory to contain this
common code. Other m68knommu CPU varients do not need use this code
though, so it doesn't make sense to move it to arch/m68knommu/kernel.
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/m68knommu/platform/5307')
-rw-r--r-- | arch/m68knommu/platform/5307/pit.c | 97 |
1 files changed, 0 insertions, 97 deletions
diff --git a/arch/m68knommu/platform/5307/pit.c b/arch/m68knommu/platform/5307/pit.c deleted file mode 100644 index 173b754..0000000 --- a/arch/m68knommu/platform/5307/pit.c +++ /dev/null @@ -1,97 +0,0 @@ -/***************************************************************************/ - -/* - * pit.c -- Freescale ColdFire PIT timer. Currently this type of - * hardware timer only exists in the Freescale ColdFire - * 5270/5271, 5282 and other CPUs. - * - * Copyright (C) 1999-2007, Greg Ungerer (gerg@snapgear.com) - * Copyright (C) 2001-2004, SnapGear Inc. (www.snapgear.com) - */ - -/***************************************************************************/ - -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/param.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/irq.h> -#include <asm/machdep.h> -#include <asm/io.h> -#include <asm/coldfire.h> -#include <asm/mcfpit.h> -#include <asm/mcfsim.h> - -/***************************************************************************/ - -/* - * By default use timer1 as the system clock timer. - */ -#define TA(a) (MCF_IPSBAR + MCFPIT_BASE1 + (a)) - -/***************************************************************************/ - -static irqreturn_t hw_tick(int irq, void *dummy) -{ - unsigned short pcsr; - - /* Reset the ColdFire timer */ - pcsr = __raw_readw(TA(MCFPIT_PCSR)); - __raw_writew(pcsr | MCFPIT_PCSR_PIF, TA(MCFPIT_PCSR)); - - return arch_timer_interrupt(irq, dummy); -} - -/***************************************************************************/ - -static struct irqaction coldfire_pit_irq = { - .name = "timer", - .flags = IRQF_DISABLED | IRQF_TIMER, - .handler = hw_tick, -}; - -void hw_timer_init(void) -{ - volatile unsigned char *icrp; - volatile unsigned long *imrp; - - setup_irq(MCFINT_VECBASE + MCFINT_PIT1, &coldfire_pit_irq); - - icrp = (volatile unsigned char *) (MCF_IPSBAR + MCFICM_INTC0 + - MCFINTC_ICR0 + MCFINT_PIT1); - *icrp = ICR_INTRCONF; - - imrp = (volatile unsigned long *) (MCF_IPSBAR + MCFICM_INTC0 + MCFPIT_IMR); - *imrp &= ~MCFPIT_IMR_IBIT; - - /* Set up PIT timer 1 as poll clock */ - __raw_writew(MCFPIT_PCSR_DISABLE, TA(MCFPIT_PCSR)); - __raw_writew(((MCF_CLK / 2) / 64) / HZ, TA(MCFPIT_PMR)); - __raw_writew(MCFPIT_PCSR_EN | MCFPIT_PCSR_PIE | MCFPIT_PCSR_OVW | - MCFPIT_PCSR_RLD | MCFPIT_PCSR_CLK64, TA(MCFPIT_PCSR)); -} - -/***************************************************************************/ - -unsigned long hw_timer_offset(void) -{ - volatile unsigned long *ipr; - unsigned long pmr, pcntr, offset; - - ipr = (volatile unsigned long *) (MCF_IPSBAR + MCFICM_INTC0 + MCFPIT_IMR); - - pmr = __raw_readw(TA(MCFPIT_PMR)); - pcntr = __raw_readw(TA(MCFPIT_PCNTR)); - - /* - * If we are still in the first half of the upcount and a - * timer interrupt is pending, then add on a ticks worth of time. - */ - offset = ((pmr - pcntr) * (1000000 / HZ)) / pmr; - if ((offset < (1000000 / HZ / 2)) && (*ipr & MCFPIT_IMR_IBIT)) - offset += 1000000 / HZ; - return offset; -} - -/***************************************************************************/ |