[PATCH] [ARM] pxa: sanitize IRQ registers access based on offset
Eric Miao
eric.y.miao at gmail.com
Wed May 5 04:44:22 EDT 2010
Signed-off-by: Eric Miao <eric.y.miao at gmail.com>
---
arch/arm/mach-pxa/include/mach/regs-intc.h | 4 -
arch/arm/mach-pxa/irq.c | 127 +++++++++++++++++++---------
2 files changed, 85 insertions(+), 46 deletions(-)
diff --git a/arch/arm/mach-pxa/include/mach/regs-intc.h
b/arch/arm/mach-pxa/include/mach/regs-intc.h
index 68464ce..662288e 100644
--- a/arch/arm/mach-pxa/include/mach/regs-intc.h
+++ b/arch/arm/mach-pxa/include/mach/regs-intc.h
@@ -27,8 +27,4 @@
#define ICFP3 __REG(0x40D0013C) /* Interrupt Controller FIQ Pending
Register 3 */
#define ICPR3 __REG(0x40D00140) /* Interrupt Controller Pending Register 3 */
-#define IPR(x) __REG(0x40D0001C + (x < 32 ? (x << 2) \
- : (x < 64 ? (0x94 + ((x - 32) << 2)) \
- : (0x128 + ((x - 64) << 2)))))
-
#endif /* __ASM_MACH_REGS_INTC_H */
diff --git a/arch/arm/mach-pxa/irq.c b/arch/arm/mach-pxa/irq.c
index 1beb40f..7db9416 100644
--- a/arch/arm/mach-pxa/irq.c
+++ b/arch/arm/mach-pxa/irq.c
@@ -16,20 +16,36 @@
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/sysdev.h>
+#include <linux/io.h>
+#include <linux/irq.h>
#include <mach/hardware.h>
-#include <asm/irq.h>
-#include <asm/mach/irq.h>
+#include <mach/irqs.h>
#include <mach/gpio.h>
-#include <mach/regs-intc.h>
#include "generic.h"
+#define IRQ_BASE (void __iomem *)io_p2v(0x40d00000)
+
+#define ICIP (0x000)
+#define ICMR (0x004)
+#define ICLR (0x008)
+#define ICFR (0x00c)
+#define ICPR (0x010)
+#define ICCR (0x014)
+#define ICHP (0x018)
+#define IPR(i) (((i) < 32) ? (0x01c + ((i) << 2)) : \
+ ((i) < 64) ? (0x0b0 + (((i) - 32) << 2)) : \
+ (0x144 + (((i) - 64) << 2)))
+#define IPR_VALID (1 << 31)
+
#define MAX_INTERNAL_IRQS 128
+#define IRQ_BIT(n) (((n) - PXA_IRQ(0)) & 0x1f)
-#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))
+static inline int cpu_has_ipr(void)
+{
+ return cpu_is_pxa27x() || cpu_is_pxa3xx();
+}
/*
* This is for peripheral IRQs internal to the PXA chip.
@@ -39,12 +55,20 @@ static int pxa_internal_irq_nr;
static void pxa_mask_irq(unsigned int irq)
{
- _ICMR(irq) &= ~(1 << IRQ_BIT(irq));
+ void __iomem *base = get_irq_chip_data(irq);
+ uint32_t icmr = __raw_readl(base + ICMR);
+
+ icmr &= ~(1 << IRQ_BIT(irq));
+ __raw_writel(icmr, base + ICMR);
}
static void pxa_unmask_irq(unsigned int irq)
{
- _ICMR(irq) |= 1 << IRQ_BIT(irq);
+ void __iomem *base = get_irq_chip_data(irq);
+ uint32_t icmr = __raw_readl(base + ICMR);
+
+ icmr |= 1 << IRQ_BIT(irq);
+ __raw_writel(icmr, base + ICMR);
}
static struct irq_chip pxa_internal_irq_chip = {
@@ -86,12 +110,16 @@ static void pxa_ack_low_gpio(unsigned int irq)
static void pxa_mask_low_gpio(unsigned int irq)
{
- ICMR &= ~(1 << (irq - PXA_IRQ(0)));
+ struct irq_desc *desc = irq_to_desc(irq);
+
+ desc->chip->mask(irq);
}
static void pxa_unmask_low_gpio(unsigned int irq)
{
- ICMR |= 1 << (irq - PXA_IRQ(0));
+ struct irq_desc *desc = irq_to_desc(irq);
+
+ desc->chip->unmask(irq);
}
static struct irq_chip pxa_low_gpio_chip = {
@@ -120,34 +148,47 @@ static void __init pxa_init_low_gpio_irq(set_wake_t fn)
pxa_low_gpio_chip.set_wake = fn;
}
+static inline void __iomem *irq_base(int i)
+{
+ static unsigned long phys_base[] = {
+ 0x40d00000,
+ 0x40d0009c,
+ 0x40d00130,
+ };
+
+ return (void __iomem *)io_p2v(phys_base[i >> 5]);
+}
+
void __init pxa_init_irq(int irq_nr, set_wake_t fn)
{
- int irq, i;
+ int irq, i, n;
BUG_ON(irq_nr > MAX_INTERNAL_IRQS);
pxa_internal_irq_nr = irq_nr;
- for (irq = PXA_IRQ(0); irq < PXA_IRQ(irq_nr); irq += 32) {
- _ICMR(irq) = 0; /* disable all IRQs */
- _ICLR(irq) = 0; /* all IRQs are IRQ, not FIQ */
- }
+ for (n = 0; n < irq_nr; n += 32) {
+ void __iomem *base = irq_base(n);
- /* initialize interrupt priority */
- if (cpu_is_pxa27x() || cpu_is_pxa3xx()) {
- for (i = 0; i < irq_nr; i++)
- IPR(i) = i | (1 << 31);
- }
+ __raw_writel(0, base + ICMR); /* disable all IRQs */
+ __raw_writel(0, base + ICLR); /* all IRQs are IRQ, not FIQ */
- /* only unmasked interrupts kick us out of idle */
- ICCR = 1;
+ for (i = n; (i < (n + 32)) && (i < irq_nr); i++) {
+ /* initialize interrupt priority */
+ if (cpu_has_ipr())
+ __raw_writel(i | IPR_VALID, IRQ_BASE + IPR(i));
- 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);
+ irq = PXA_IRQ(i);
+ set_irq_chip(irq, &pxa_internal_irq_chip);
+ set_irq_chip_data(irq, base);
+ set_irq_handler(irq, handle_level_irq);
+ set_irq_flags(irq, IRQF_VALID);
+ }
}
+ /* only unmasked interrupts kick us out of idle */
+ __raw_writel(1, irq_base(0) + ICCR);
+
pxa_internal_irq_chip.set_wake = fn;
pxa_init_low_gpio_irq(fn);
}
@@ -158,36 +199,38 @@ static unsigned long saved_ipr[MAX_INTERNAL_IRQS];
static int pxa_irq_suspend(struct sys_device *dev, pm_message_t state)
{
- int i, irq = PXA_IRQ(0);
+ int i;
- for (i = 0; irq < PXA_IRQ(pxa_internal_irq_nr); i++, irq += 32) {
- saved_icmr[i] = _ICMR(irq);
- _ICMR(irq) = 0;
+ for (i = 0; i < pxa_internal_irq_nr; i += 32) {
+ void __iomem *base = irq_base(i);
+
+ saved_icmr[i] = __raw_readl(base + ICMR);
+ __raw_writel(0, base + ICMR);
}
- if (cpu_is_pxa27x() || cpu_is_pxa3xx()) {
+ if (cpu_has_ipr())
for (i = 0; i < pxa_internal_irq_nr; i++)
- saved_ipr[i] = IPR(i);
- }
+ saved_ipr[i] = __raw_readl(IRQ_BASE + IPR(i));
return 0;
}
static int pxa_irq_resume(struct sys_device *dev)
{
- int i, irq = PXA_IRQ(0);
+ int i;
- if (cpu_is_pxa27x() || cpu_is_pxa3xx()) {
- for (i = 0; i < pxa_internal_irq_nr; i++)
- IPR(i) = saved_ipr[i];
- }
+ for (i = 0; i < pxa_internal_irq_nr; i += 32) {
+ void __iomem *base = irq_base(i);
- for (i = 0; irq < PXA_IRQ(pxa_internal_irq_nr); i++, irq += 32) {
- _ICMR(irq) = saved_icmr[i];
- _ICLR(irq) = 0;
+ __raw_writel(saved_icmr[i], base + ICMR);
+ __raw_writel(0, base + ICLR);
}
- ICCR = 1;
+ if (cpu_has_ipr())
+ for (i = 0; i < pxa_internal_irq_nr; i++)
+ __raw_writel(saved_ipr[i], IRQ_BASE + IPR(i));
+
+ __raw_writel(1, IRQ_BASE + ICCR);
return 0;
}
#else
--
1.5.6.5
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