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Code Issues

cleanup IRQ code

Browse Source 
SVN-Revision: 8701
This commit is contained in:
Gabor Juhos 2007-09-09 07:33:33 +00:00
parent 73b2555da2
commit 1665832e68
1 changed files with 23 additions and 42 deletions
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65
target/linux/adm5120/files/arch/mips/adm5120/irq.c
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@ -29,6 +29,7 @@
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/irq_cpu.h>
#include <asm/mipsregs.h>
@ -37,18 +38,18 @@
#include <asm/mach-adm5120/adm5120_defs.h>
#include <asm/mach-adm5120/adm5120_irq.h>
#define INTC_REG(r) (*(volatile u32 *)(KSEG1ADDR(ADM5120_INTC_BASE) + r))
#define INTC_WRITE(reg, val) __raw_writel((val), \
(void __iomem *)(KSEG1ADDR(ADM5120_INTC_BASE) + reg))
#define INTC_READ(reg) __raw_readl( \
(void __iomem *)(KSEG1ADDR(ADM5120_INTC_BASE) + reg))
static void adm5120_intc_irq_unmask(unsigned int irq);
static void adm5120_intc_irq_mask(unsigned int irq);
static int adm5120_intc_irq_set_type(unsigned int irq, unsigned int flow_type);
static struct irq_chip adm5120_intc_irq_chip = {
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,20)
.name = "INTC",
#else
.typename = "INTC",
#endif
.unmask = adm5120_intc_irq_unmask,
.mask = adm5120_intc_irq_mask,
.mask_ack = adm5120_intc_irq_mask,
@ -62,22 +63,14 @@ static struct irqaction adm5120_intc_irq_action = {
static void adm5120_intc_irq_unmask(unsigned int irq)
{
unsigned long flags;
irq -= ADM5120_INTC_IRQ_BASE;
local_irq_save(flags);
INTC_REG(INTC_REG_IRQ_ENABLE) = (1 << irq);
local_irq_restore(flags);
INTC_WRITE(INTC_REG_IRQ_ENABLE, 1 << irq);
}
static void adm5120_intc_irq_mask(unsigned int irq)
{
unsigned long flags;
irq -= ADM5120_INTC_IRQ_BASE;
local_irq_save(flags);
INTC_REG(INTC_REG_IRQ_DISABLE) = (1 << irq);
local_irq_restore(flags);
INTC_WRITE(INTC_REG_IRQ_DISABLE, 1 << irq);
}
static int adm5120_intc_irq_set_type(unsigned int irq, unsigned int flow_type)
@ -86,9 +79,8 @@ static int adm5120_intc_irq_set_type(unsigned int irq, unsigned int flow_type)
#if 1
unsigned int sense;
unsigned long mode;
int err;
int err = 0;
err = 0;
sense = flow_type & (IRQ_TYPE_SENSE_MASK);
switch (sense) {
case IRQ_TYPE_NONE:
@ -108,20 +100,20 @@ static int adm5120_intc_irq_set_type(unsigned int irq, unsigned int flow_type)
err = -EINVAL;
break;
}
if (err)
return err;
switch (irq) {
case ADM5120_IRQ_GPIO2:
case ADM5120_IRQ_GPIO4:
mode = INTC_REG(INTC_REG_INT_MODE);
mode = INTC_READ(INTC_REG_INT_MODE);
if (sense == IRQ_TYPE_LEVEL_LOW)
mode |= (1 << (irq-ADM5120_INTC_IRQ_BASE));
else
mode &= (1 << (irq-ADM5120_INTC_IRQ_BASE));
INTC_REG(INTC_REG_INT_MODE) = mode;
INTC_WRITE(INTC_REG_INT_MODE, mode);
/* fallthrogh */
default:
irq_desc[irq].status &= ~IRQ_TYPE_SENSE_MASK;
@ -137,33 +129,21 @@ static void adm5120_intc_irq_dispatch(void)
unsigned long status;
int irq;
#if 1
/* dispatch only one IRQ at a time */
status = INTC_REG(INTC_REG_IRQ_STATUS) & INTC_INT_ALL;
status = INTC_READ(INTC_REG_IRQ_STATUS) & INTC_INT_ALL;
if (status) {
irq = ADM5120_INTC_IRQ_BASE+fls(status)-1;
do_IRQ(irq);
} else
spurious_interrupt();
#else
status = INTC_REG(INTC_REG_IRQ_STATUS) & INTC_INT_ALL;
if (status) {
for (irq=ADM5120_INTC_IRQ_BASE; irq <= ADM5120_INTC_IRQ_BASE +
INTC_IRQ_LAST; irq++, status >>=1) {
if ((status & 1) == 1)
do_IRQ(irq);
}
} else
spurious_interrupt();
#endif
}
asmlinkage void plat_irq_dispatch(void)
{
unsigned long pending;
pending = read_c0_status() & read_c0_cause();
pending = read_c0_status() & read_c0_cause() & ST0_IM;
if (pending & STATUSF_IP7)
do_IRQ(ADM5120_IRQ_COUNTER);
@ -174,23 +154,24 @@ asmlinkage void plat_irq_dispatch(void)
}
#define INTC_IRQ_STATUS (IRQ_LEVEL | IRQ_TYPE_LEVEL_HIGH | IRQ_DISABLED)
static void __init adm5120_intc_irq_init(int base)
{
int i;
/* disable all interrupts */
INTC_REG(INTC_REG_IRQ_DISABLE) = INTC_INT_ALL;
INTC_WRITE(INTC_REG_IRQ_DISABLE, INTC_INT_ALL);
/* setup all interrupts to generate IRQ instead of FIQ */
INTC_REG(INTC_REG_INT_MODE) = 0;
INTC_WRITE(INTC_REG_INT_MODE, 0);
/* set active level for all external interrupts to HIGH */
INTC_REG(INTC_REG_INT_LEVEL) = 0;
INTC_WRITE(INTC_REG_INT_LEVEL, 0);
/* disable usage of the TEST_SOURCE register */
INTC_REG(INTC_REG_IRQ_SOURCE_SELECT) = 0;
INTC_WRITE(INTC_REG_IRQ_SOURCE_SELECT, 0);
for(i=ADM5120_INTC_IRQ_BASE; i <= ADM5120_INTC_IRQ_BASE+INTC_IRQ_LAST;
for (i = ADM5120_INTC_IRQ_BASE; i <= ADM5120_INTC_IRQ_BASE+INTC_IRQ_LAST;
i++) {
irq_desc[i].status = INTC_IRQ_STATUS;
set_irq_chip_and_handler(i, &adm5120_intc_irq_chip,
set_irq_chip_and_handler(i, &adm5120_intc_irq_chip,
handle_level_irq);
}