Commit f6fb7af4 authored by eric miao's avatar eric miao Committed by Russell King
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[ARM] pxa: integrate low IRQ chip (ICIP) and high IRQ chip (ICIP2) into one



This makes the code better organized and simplified a bit.  The change
will lose a bit of performance when performing IRQ ack/mask/unmask,but
that's not too much after checking the result binary.

This patch also removes the ugly #ifdef CONFIG_PXA27x .. #endif by
carefully not to access those pxa{27x,3xx} specific registers, this
is done by keeping an internal IRQ number variable.  The pxa-regs.h
is also modified so registers for IRQ > PXA_IRQ(31) are made public
even if CONFIG_PXA{27x,3xx} isn't defined (for pxa25x's sake)

The incorrect assumption in the original code that internal irq starts
from 0 is also corrected by comparing with PXA_IRQ(0).

"struct sys_device" for the IRQ are reduced into one single device on
pxa{27x,3xx}.
Signed-off-by: default avatareric miao <eric.miao@marvell.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent e3630db1
......@@ -12,8 +12,7 @@
struct sys_timer;
extern struct sys_timer pxa_timer;
extern void __init pxa_init_irq_low(void);
extern void __init pxa_init_irq_high(void);
extern void __init pxa_init_irq(int irq_nr);
extern void __init pxa_init_irq_gpio(int gpio_nr);
extern void __init pxa_init_irq_set_wake(int (*set_wake)(unsigned int, unsigned int));
extern void __init pxa_init_gpio_set_wake(int (*set_wake)(unsigned int, unsigned int));
......
......@@ -24,92 +24,57 @@
#include "generic.h"
#define IRQ_BIT(n) (((n) - PXA_IRQ(0)) & 0x1f)
#define _ICMR(n) (*((((n) - PXA_IRQ(0)) & ~0x1f) ? &ICMR2 : &ICMR))
#define _ICLR(n) (*((((n) - PXA_IRQ(0)) & ~0x1f) ? &ICLR2 : &ICLR))
/*
* This is for peripheral IRQs internal to the PXA chip.
*/
static void pxa_mask_low_irq(unsigned int irq)
static int pxa_internal_irq_nr;
static void pxa_mask_irq(unsigned int irq)
{
ICMR &= ~(1 << irq);
_ICMR(irq) &= ~(1 << IRQ_BIT(irq));
}
static void pxa_unmask_low_irq(unsigned int irq)
static void pxa_unmask_irq(unsigned int irq)
{
ICMR |= (1 << irq);
_ICMR(irq) |= 1 << IRQ_BIT(irq);
}
static struct irq_chip pxa_internal_chip_low = {
static struct irq_chip pxa_internal_irq_chip = {
.name = "SC",
.ack = pxa_mask_low_irq,
.mask = pxa_mask_low_irq,
.unmask = pxa_unmask_low_irq,
.ack = pxa_mask_irq,
.mask = pxa_mask_irq,
.unmask = pxa_unmask_irq,
};
void __init pxa_init_irq_low(void)
void __init pxa_init_irq(int irq_nr)
{
int irq;
/* disable all IRQs */
ICMR = 0;
pxa_internal_irq_nr = irq_nr;
/* all IRQs are IRQ, not FIQ */
ICLR = 0;
for (irq = 0; irq < irq_nr; irq += 32) {
_ICMR(irq) = 0; /* disable all IRQs */
_ICLR(irq) = 0; /* all IRQs are IRQ, not FIQ */
}
/* only unmasked interrupts kick us out of idle */
ICCR = 1;
for (irq = PXA_IRQ(0); irq <= PXA_IRQ(31); irq++) {
set_irq_chip(irq, &pxa_internal_chip_low);
set_irq_handler(irq, handle_level_irq);
set_irq_flags(irq, IRQF_VALID);
}
}
#if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
/*
* This is for the second set of internal IRQs as found on the PXA27x.
*/
static void pxa_mask_high_irq(unsigned int irq)
{
ICMR2 &= ~(1 << (irq - 32));
}
static void pxa_unmask_high_irq(unsigned int irq)
{
ICMR2 |= (1 << (irq - 32));
}
static struct irq_chip pxa_internal_chip_high = {
.name = "SC-hi",
.ack = pxa_mask_high_irq,
.mask = pxa_mask_high_irq,
.unmask = pxa_unmask_high_irq,
};
void __init pxa_init_irq_high(void)
{
int irq;
ICMR2 = 0;
ICLR2 = 0;
for (irq = PXA_IRQ(32); irq < PXA_IRQ(64); irq++) {
set_irq_chip(irq, &pxa_internal_chip_high);
for (irq = PXA_IRQ(0); irq < PXA_IRQ(irq_nr); irq++) {
set_irq_chip(irq, &pxa_internal_irq_chip);
set_irq_handler(irq, handle_level_irq);
set_irq_flags(irq, IRQF_VALID);
}
}
#endif
void __init pxa_init_irq_set_wake(int (*set_wake)(unsigned int, unsigned int))
{
pxa_internal_chip_low.set_wake = set_wake;
#ifdef CONFIG_PXA27x
pxa_internal_chip_high.set_wake = set_wake;
#endif
pxa_internal_irq_chip.set_wake = set_wake;
pxa_init_gpio_set_wake(set_wake);
}
......@@ -118,19 +83,11 @@ static unsigned long saved_icmr[2];
static int pxa_irq_suspend(struct sys_device *dev, pm_message_t state)
{
switch (dev->id) {
case 0:
saved_icmr[0] = ICMR;
ICMR = 0;
break;
#if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
case 1:
saved_icmr[1] = ICMR2;
ICMR2 = 0;
break;
#endif
default:
return -EINVAL;
int i, irq = PXA_IRQ(0);
for (i = 0; irq < PXA_IRQ(pxa_internal_irq_nr); i++, irq += 32) {
saved_icmr[i] = _ICMR(irq);
_ICMR(irq) = 0;
}
return 0;
......@@ -138,22 +95,14 @@ static int pxa_irq_suspend(struct sys_device *dev, pm_message_t state)
static int pxa_irq_resume(struct sys_device *dev)
{
switch (dev->id) {
case 0:
ICMR = saved_icmr[0];
ICLR = 0;
ICCR = 1;
break;
#if defined(CONFIG_PXA27x) || defined(CONFIG_PXA3xx)
case 1:
ICMR2 = saved_icmr[1];
ICLR2 = 0;
break;
#endif
default:
return -EINVAL;
int i, irq = PXA_IRQ(0);
for (i = 0; irq < PXA_IRQ(pxa_internal_irq_nr); i++, irq += 32) {
_ICMR(irq) = saved_icmr[i];
_ICLR(irq) = 0;
}
ICCR = 1;
return 0;
}
#else
......
......@@ -267,7 +267,7 @@ set_pwer:
void __init pxa25x_init_irq(void)
{
pxa_init_irq_low();
pxa_init_irq(32);
pxa_init_irq_gpio(85);
pxa_init_irq_set_wake(pxa25x_set_wake);
}
......
......@@ -340,8 +340,7 @@ set_pwer:
void __init pxa27x_init_irq(void)
{
pxa_init_irq_low();
pxa_init_irq_high();
pxa_init_irq(34);
pxa_init_irq_gpio(128);
pxa_init_irq_set_wake(pxa27x_set_wake);
}
......@@ -389,10 +388,6 @@ static struct platform_device *devices[] __initdata = {
static struct sys_device pxa27x_sysdev[] = {
{
.id = 0,
.cls = &pxa_irq_sysclass,
}, {
.id = 1,
.cls = &pxa_irq_sysclass,
}, {
.cls = &pxa_gpio_sysclass,
......
......@@ -513,8 +513,7 @@ void __init pxa3xx_init_irq(void)
value |= (1 << 6);
__asm__ __volatile__("mcr p15, 0, %0, c15, c1, 0\n": :"r"(value));
pxa_init_irq_low();
pxa_init_irq_high();
pxa_init_irq(56);
pxa_init_irq_gpio(128);
pxa3xx_init_irq_pm();
}
......@@ -538,10 +537,6 @@ static struct platform_device *devices[] __initdata = {
static struct sys_device pxa3xx_sysdev[] = {
{
.id = 0,
.cls = &pxa_irq_sysclass,
}, {
.id = 1,
.cls = &pxa_irq_sysclass,
}, {
.cls = &pxa_gpio_sysclass,
......
......@@ -1129,6 +1129,11 @@
#define ICPR __REG(0x40D00010) /* Interrupt Controller Pending Register */
#define ICCR __REG(0x40D00014) /* Interrupt Controller Control Register */
#define ICIP2 __REG(0x40D0009C) /* Interrupt Controller IRQ Pending Register 2 */
#define ICMR2 __REG(0x40D000A0) /* Interrupt Controller Mask Register 2 */
#define ICLR2 __REG(0x40D000A4) /* Interrupt Controller Level Register 2 */
#define ICFP2 __REG(0x40D000A8) /* Interrupt Controller FIQ Pending Register 2 */
#define ICPR2 __REG(0x40D000AC) /* Interrupt Controller Pending Register 2 */
/*
* General Purpose I/O
......@@ -1200,12 +1205,6 @@
/* Interrupt Controller */
#define ICIP2 __REG(0x40D0009C) /* Interrupt Controller IRQ Pending Register 2 */
#define ICMR2 __REG(0x40D000A0) /* Interrupt Controller Mask Register 2 */
#define ICLR2 __REG(0x40D000A4) /* Interrupt Controller Level Register 2 */
#define ICFP2 __REG(0x40D000A8) /* Interrupt Controller FIQ Pending Register 2 */
#define ICPR2 __REG(0x40D000AC) /* Interrupt Controller Pending Register 2 */
#define _GPLR(x) __REG2(0x40E00000, ((x) & 0x60) >> 3)
#define _GPDR(x) __REG2(0x40E0000C, ((x) & 0x60) >> 3)
#define _GPSR(x) __REG2(0x40E00018, ((x) & 0x60) >> 3)
......
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