From: Greg Ungerer Date: Fri, 1 Feb 2008 07:37:36 +0000 (+1000) Subject: m68knommu: move ColdFire pit.c to its own coldfire directory X-Git-Tag: firefly_0821_release~23600 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=703d01255e650b2f1ff6b2df5345bd481fd094e6;p=firefly-linux-kernel-4.4.55.git 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 Signed-off-by: Linus Torvalds --- diff --git a/arch/m68knommu/platform/5307/pit.c b/arch/m68knommu/platform/5307/pit.c deleted file mode 100644 index 173b754d1cda..000000000000 --- 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 -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -/***************************************************************************/ - -/* - * 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; -} - -/***************************************************************************/ diff --git a/arch/m68knommu/platform/coldfire/pit.c b/arch/m68knommu/platform/coldfire/pit.c new file mode 100644 index 000000000000..173b754d1cda --- /dev/null +++ b/arch/m68knommu/platform/coldfire/pit.c @@ -0,0 +1,97 @@ +/***************************************************************************/ + +/* + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/***************************************************************************/ + +/* + * 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; +} + +/***************************************************************************/