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ARM i.MX avic: convert to use generic irq chip 

Convert i.MX avic irq handler to use generic irq chip. This not only
provides a cleanup implementation of irq chip handler, but also
implements suspend/resume interface with the help of generic irq chip
interface.

Change mxc_irq_chip to a new structure mxc_extra_irq to handle fiq
and priority functions.

Signed-off-by: Hui Wang <jason77.wang@gmail.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Hui Wang 2011-09-22 17:40:08 +08:00 committed by Sascha Hauer
parent 40d97b89bd
commit 3439a397a8
4 changed files with 75 additions and 36 deletions
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79
arch/arm/plat-mxc/avic.c
View File

@ -50,6 +50,8 @@
void __iomem *avic_base;
static u32 avic_saved_mask_reg[2];
#ifdef CONFIG_MXC_IRQ_PRIOR
static int avic_irq_set_priority(unsigned char irq, unsigned char prio)
{
@ -90,24 +92,8 @@ static int avic_set_irq_fiq(unsigned int irq, unsigned int type)
}
#endif /* CONFIG_FIQ */
/* Disable interrupt number "irq" in the AVIC */
static void mxc_mask_irq(struct irq_data *d)
{
__raw_writel(d->irq, avic_base + AVIC_INTDISNUM);
}
/* Enable interrupt number "irq" in the AVIC */
static void mxc_unmask_irq(struct irq_data *d)
{
__raw_writel(d->irq, avic_base + AVIC_INTENNUM);
}
static struct mxc_irq_chip mxc_avic_chip = {
.base = {
.irq_ack = mxc_mask_irq,
.irq_mask = mxc_mask_irq,
.irq_unmask = mxc_unmask_irq,
},
static struct mxc_extra_irq avic_extra_irq = {
#ifdef CONFIG_MXC_IRQ_PRIOR
.set_priority = avic_irq_set_priority,
#endif
@ -116,6 +102,56 @@ static struct mxc_irq_chip mxc_avic_chip = {
#endif
};
#ifdef CONFIG_PM
static void avic_irq_suspend(struct irq_data *d)
{
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
struct irq_chip_type *ct = gc->chip_types;
int idx = gc->irq_base >> 5;
avic_saved_mask_reg[idx] = __raw_readl(avic_base + ct->regs.mask);
__raw_writel(gc->wake_active, avic_base + ct->regs.mask);
}
static void avic_irq_resume(struct irq_data *d)
{
struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
struct irq_chip_type *ct = gc->chip_types;
int idx = gc->irq_base >> 5;
__raw_writel(avic_saved_mask_reg[idx], avic_base + ct->regs.mask);
}
#else
#define avic_irq_suspend NULL
#define avic_irq_resume NULL
#endif
static __init void avic_init_gc(unsigned int irq_start)
{
struct irq_chip_generic *gc;
struct irq_chip_type *ct;
int idx = irq_start >> 5;
gc = irq_alloc_generic_chip("mxc-avic", 1, irq_start, avic_base,
handle_level_irq);
gc->private = &avic_extra_irq;
gc->wake_enabled = IRQ_MSK(32);
ct = gc->chip_types;
ct->chip.irq_mask = irq_gc_mask_clr_bit;
ct->chip.irq_unmask = irq_gc_mask_set_bit;
ct->chip.irq_ack = irq_gc_mask_clr_bit;
ct->chip.irq_set_wake = irq_gc_set_wake;
ct->chip.irq_suspend = avic_irq_suspend;
ct->chip.irq_resume = avic_irq_resume;
ct->regs.mask = !idx ? AVIC_INTENABLEL : AVIC_INTENABLEH;
ct->regs.ack = ct->regs.mask;
irq_setup_generic_chip(gc, IRQ_MSK(32), 0, IRQ_NOREQUEST, 0);
}
/*
* This function initializes the AVIC hardware and disables all the
* interrupts. It registers the interrupt enable and disable functions
@ -140,11 +176,9 @@ void __init mxc_init_irq(void __iomem *irqbase)
/* all IRQ no FIQ */
__raw_writel(0, avic_base + AVIC_INTTYPEH);
__raw_writel(0, avic_base + AVIC_INTTYPEL);
for (i = 0; i < AVIC_NUM_IRQS; i++) {
irq_set_chip_and_handler(i, &mxc_avic_chip.base,
handle_level_irq);
set_irq_flags(i, IRQF_VALID);
}
for (i = 0; i < AVIC_NUM_IRQS; i += 32)
avic_init_gc(i);
/* Set default priority value (0) for all IRQ's */
for (i = 0; i < 8; i++)
@ -157,4 +191,3 @@ void __init mxc_init_irq(void __iomem *irqbase)
printk(KERN_INFO "MXC IRQ initialized\n");
}

21
arch/arm/plat-mxc/irq-common.c
View File

@ -23,17 +23,17 @@
int imx_irq_set_priority(unsigned char irq, unsigned char prio)
{
struct mxc_irq_chip *chip;
struct irq_chip *base;
struct irq_chip_generic *gc;
struct mxc_extra_irq *exirq;
int ret;
ret = -ENOSYS;
base = irq_get_chip(irq);
if (base) {
chip = container_of(base, struct mxc_irq_chip, base);
if (chip->set_priority)
ret = chip->set_priority(irq, prio);
gc = irq_get_chip_data(irq);
if (gc && gc->private) {
exirq = gc->private;
if (exirq->set_priority)
ret = exirq->set_priority(irq, prio);
}
return ret;
@ -43,15 +43,16 @@ EXPORT_SYMBOL(imx_irq_set_priority);
int mxc_set_irq_fiq(unsigned int irq, unsigned int type)
{
struct irq_chip_generic *gc;
int (*set_irq_fiq)(unsigned int, unsigned int);
struct mxc_extra_irq *exirq;
int ret;
ret = -ENOSYS;
gc = irq_get_chip_data(irq);
if (gc && gc->private) {
set_irq_fiq = gc->private;
ret = set_irq_fiq(irq, type);
exirq = gc->private;
if (exirq->set_irq_fiq)
ret = exirq->set_irq_fiq(irq, type);
}
return ret;

3
arch/arm/plat-mxc/irq-common.h
View File

@ -19,9 +19,8 @@
#ifndef __PLAT_MXC_IRQ_COMMON_H__
#define __PLAT_MXC_IRQ_COMMON_H__
struct mxc_irq_chip
struct mxc_extra_irq
{
struct irq_chip base;
int (*set_priority)(unsigned char irq, unsigned char prio);
int (*set_irq_fiq)(unsigned int irq, unsigned int type);
};

8
arch/arm/plat-mxc/tzic.c
View File

@ -74,6 +74,12 @@ static int tzic_set_irq_fiq(unsigned int irq, unsigned int type)
static unsigned int *wakeup_intr[4];
static struct mxc_extra_irq tzic_extra_irq = {
#ifdef CONFIG_FIQ
.set_irq_fiq = tzic_set_irq_fiq,
#endif
};
static __init void tzic_init_gc(unsigned int irq_start)
{
struct irq_chip_generic *gc;
@ -82,7 +88,7 @@ static __init void tzic_init_gc(unsigned int irq_start)
gc = irq_alloc_generic_chip("tzic", 1, irq_start, tzic_base,
handle_level_irq);
gc->private = tzic_set_irq_fiq;
gc->private = &tzic_extra_irq;
gc->wake_enabled = IRQ_MSK(32);
wakeup_intr[idx] = &gc->wake_active;