diff options
Diffstat (limited to 'arch/arm/mach-pxa/irq.c')
| -rw-r--r-- | arch/arm/mach-pxa/irq.c | 126 |
1 files changed, 95 insertions, 31 deletions
diff --git a/arch/arm/mach-pxa/irq.c b/arch/arm/mach-pxa/irq.c index f6e0300e4f64..54e91c9e71c8 100644 --- a/arch/arm/mach-pxa/irq.c +++ b/arch/arm/mach-pxa/irq.c @@ -16,18 +16,31 @@ #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_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)) +#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 IRQ_BIT(n) (((n) - PXA_IRQ(0)) & 0x1f) + +#define MAX_INTERNAL_IRQS 128 /* * This is for peripheral IRQs internal to the PXA chip. @@ -35,14 +48,27 @@ static int pxa_internal_irq_nr; +static inline int cpu_has_ipr(void) +{ + return !cpu_is_pxa25x(); +} + 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 = { @@ -84,12 +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 = { @@ -118,40 +148,68 @@ 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; + 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); + + __raw_writel(0, base + ICMR); /* disable all IRQs */ + __raw_writel(0, base + ICLR); /* all IRQs are IRQ, not FIQ */ + 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)); + + 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 */ - ICCR = 1; - - 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); - } + __raw_writel(1, irq_base(0) + ICCR); pxa_internal_irq_chip.set_wake = fn; pxa_init_low_gpio_irq(fn); } #ifdef CONFIG_PM -static unsigned long saved_icmr[2]; +static unsigned long saved_icmr[MAX_INTERNAL_IRQS/32]; +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_has_ipr()) { + for (i = 0; i < pxa_internal_irq_nr; i++) + saved_ipr[i] = __raw_readl(IRQ_BASE + IPR(i)); } return 0; @@ -159,14 +217,20 @@ static int pxa_irq_suspend(struct sys_device *dev, pm_message_t state) static int pxa_irq_resume(struct sys_device *dev) { - int i, irq = PXA_IRQ(0); + int i; - for (i = 0; irq < PXA_IRQ(pxa_internal_irq_nr); i++, irq += 32) { - _ICMR(irq) = saved_icmr[i]; - _ICLR(irq) = 0; + for (i = 0; i < pxa_internal_irq_nr; i += 32) { + void __iomem *base = irq_base(i); + + __raw_writel(saved_icmr[i], base + ICMR); + __raw_writel(0, base + ICLR); } - ICCR = 1; + if (!cpu_is_pxa25x()) + 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 |