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m68knommu: move some init code out of unmask routine for ColdFire intc-2

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Use a proper irq_startup() routine to intialize the interrupt priority
and level register in the ColdFire intc-2 controller code. We shouldn't
be checking if the priority/level has been set on every unmask operation.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
This commit is contained in:
Greg Ungerer 2011-03-07 17:42:28 +10:00
parent 49bc6deace
commit 6d0f33fa80
1 changed files with 32 additions and 15 deletions
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47
arch/m68knommu/platform/coldfire/intc-2.c
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@ -30,13 +30,6 @@
#define MCFSIM_ICR_LEVEL(l) ((l)<<3) /* Level l intr */
#define MCFSIM_ICR_PRI(p) (p) /* Priority p intr */
/*
* Each vector needs a unique priority and level associated with it.
* We don't really care so much what they are, we don't rely on the
* traditional priority interrupt scheme of the m68k/ColdFire.
*/
static u8 intc_intpri = MCFSIM_ICR_LEVEL(6) | MCFSIM_ICR_PRI(6);
#ifdef MCFICM_INTC1
#define NR_VECS 128
#else
@ -64,25 +57,21 @@ static void intc_irq_mask(struct irq_data *d)
static void intc_irq_unmask(struct irq_data *d)
{
unsigned int irq = d->irq - MCFINT_VECBASE;
unsigned long intaddr, imraddr, icraddr;
unsigned long imraddr;
u32 val, imrbit;
#ifdef MCFICM_INTC1
intaddr = (irq & 0x40) ? MCFICM_INTC1 : MCFICM_INTC0;
imraddr = (irq & 0x40) ? MCFICM_INTC1 : MCFICM_INTC0;
#else
intaddr = MCFICM_INTC0;
imraddr = MCFICM_INTC0;
#endif
imraddr = intaddr + ((irq & 0x20) ? MCFINTC_IMRH : MCFINTC_IMRL);
icraddr = intaddr + MCFINTC_ICR0 + (irq & 0x3f);
imraddr += ((irq & 0x20) ? MCFINTC_IMRH : MCFINTC_IMRL);
imrbit = 0x1 << (irq & 0x1f);
/* Don't set the "maskall" bit! */
if ((irq & 0x20) == 0)
imrbit |= 0x1;
if (__raw_readb(icraddr) == 0)
__raw_writeb(intc_intpri--, icraddr);
val = __raw_readl(imraddr);
__raw_writel(val & ~imrbit, imraddr);
}
@ -92,8 +81,36 @@ static int intc_irq_set_type(struct irq_data *d, unsigned int type)
return 0;
}
/*
* Each vector needs a unique priority and level associated with it.
* We don't really care so much what they are, we don't rely on the
* traditional priority interrupt scheme of the m68k/ColdFire. This
* only needs to be set once for an interrupt, and we will never change
* these values once we have set them.
*/
static u8 intc_intpri = MCFSIM_ICR_LEVEL(6) | MCFSIM_ICR_PRI(6);
static unsigned int intc_irq_startup(struct irq_data *d)
{
unsigned int irq = d->irq - MCFINT_VECBASE;
unsigned long icraddr;
#ifdef MCFICM_INTC1
icraddr = (irq & 0x40) ? MCFICM_INTC1 : MCFICM_INTC0;
#else
icraddr = MCFICM_INTC0;
#endif
icraddr += MCFINTC_ICR0 + (irq & 0x3f);
if (__raw_readb(icraddr) == 0)
__raw_writeb(intc_intpri--, icraddr);
intc_irq_unmask(d);
return 0;
}
static struct irq_chip intc_irq_chip = {
.name = "CF-INTC",
.irq_startup = intc_irq_startup,
.irq_mask = intc_irq_mask,
.irq_unmask = intc_irq_unmask,
.irq_set_type = intc_irq_set_type,