diff options
Diffstat (limited to 'arch/m68knommu/platform/5307/pit.c')
| -rw-r--r-- | arch/m68knommu/platform/5307/pit.c | 88 |
1 files changed, 0 insertions, 88 deletions
diff --git a/arch/m68knommu/platform/5307/pit.c b/arch/m68knommu/platform/5307/pit.c deleted file mode 100644 index 323f2677e49..00000000000 --- a/arch/m68knommu/platform/5307/pit.c +++ /dev/null @@ -1,88 +0,0 @@ -/***************************************************************************/ - -/* - * pit.c -- Motorola ColdFire PIT timer. Currently this type of - * hardware timer only exists in the Motorola ColdFire - * 5270/5271, 5282 and other CPUs. - * - * Copyright (C) 1999-2004, Greg Ungerer (gerg@snapgear.com) - * Copyright (C) 2001-2004, SnapGear Inc. (www.snapgear.com) - * - */ - -/***************************************************************************/ - -#include <linux/config.h> -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/param.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <asm/irq.h> -#include <asm/coldfire.h> -#include <asm/mcfpit.h> -#include <asm/mcfsim.h> - -/***************************************************************************/ - -void coldfire_pit_tick(void) -{ - volatile struct mcfpit *tp; - - /* Reset the ColdFire timer */ - tp = (volatile struct mcfpit *) (MCF_IPSBAR + MCFPIT_BASE1); - tp->pcsr |= MCFPIT_PCSR_PIF; -} - -/***************************************************************************/ - -void coldfire_pit_init(irqreturn_t (*handler)(int, void *, struct pt_regs *)) -{ - volatile unsigned char *icrp; - volatile unsigned long *imrp; - volatile struct mcfpit *tp; - - request_irq(MCFINT_VECBASE + MCFINT_PIT1, handler, SA_INTERRUPT, - "ColdFire Timer", NULL); - - 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 */ - tp = (volatile struct mcfpit *) (MCF_IPSBAR + MCFPIT_BASE1); - tp->pcsr = MCFPIT_PCSR_DISABLE; - - tp->pmr = ((MCF_CLK / 2) / 64) / HZ; - tp->pcsr = MCFPIT_PCSR_EN | MCFPIT_PCSR_PIE | MCFPIT_PCSR_OVW | - MCFPIT_PCSR_RLD | MCFPIT_PCSR_CLK64; -} - -/***************************************************************************/ - -unsigned long coldfire_pit_offset(void) -{ - volatile struct mcfpit *tp; - volatile unsigned long *ipr; - unsigned long pmr, pcntr, offset; - - tp = (volatile struct mcfpit *) (MCF_IPSBAR + MCFPIT_BASE1); - ipr = (volatile unsigned long *) (MCF_IPSBAR + MCFICM_INTC0 + MCFPIT_IMR); - - pmr = *(&tp->pmr); - pcntr = *(&tp->pcntr); - - /* - * If we are still in the first half of the upcount and a - * timer interupt 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; -} - -/***************************************************************************/ |
