diff options
Diffstat (limited to 'arch/avr32/mach-at32ap/intc.c')
| -rw-r--r-- | arch/avr32/mach-at32ap/intc.c | 200 |
1 files changed, 0 insertions, 200 deletions
diff --git a/arch/avr32/mach-at32ap/intc.c b/arch/avr32/mach-at32ap/intc.c deleted file mode 100644 index aaff83cc50f0..000000000000 --- a/arch/avr32/mach-at32ap/intc.c +++ /dev/null @@ -1,200 +0,0 @@ -/* - * Copyright (C) 2006, 2008 Atmel Corporation - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -#include <linux/clk.h> -#include <linux/err.h> -#include <linux/init.h> -#include <linux/interrupt.h> -#include <linux/irq.h> -#include <linux/platform_device.h> -#include <linux/syscore_ops.h> -#include <linux/export.h> - -#include <asm/io.h> - -#include "intc.h" - -struct intc { - void __iomem *regs; - struct irq_chip chip; -#ifdef CONFIG_PM - unsigned long suspend_ipr; - unsigned long saved_ipr[64]; -#endif -}; - -extern struct platform_device at32_intc0_device; - -/* - * TODO: We may be able to implement mask/unmask by setting IxM flags - * in the status register. - */ -static void intc_mask_irq(struct irq_data *d) -{ - -} - -static void intc_unmask_irq(struct irq_data *d) -{ - -} - -static struct intc intc0 = { - .chip = { - .name = "intc", - .irq_mask = intc_mask_irq, - .irq_unmask = intc_unmask_irq, - }, -}; - -/* - * All interrupts go via intc at some point. - */ -asmlinkage void do_IRQ(int level, struct pt_regs *regs) -{ - struct pt_regs *old_regs; - unsigned int irq; - unsigned long status_reg; - - local_irq_disable(); - - old_regs = set_irq_regs(regs); - - irq_enter(); - - irq = intc_readl(&intc0, INTCAUSE0 - 4 * level); - generic_handle_irq(irq); - - /* - * Clear all interrupt level masks so that we may handle - * interrupts during softirq processing. If this is a nested - * interrupt, interrupts must stay globally disabled until we - * return. - */ - status_reg = sysreg_read(SR); - status_reg &= ~(SYSREG_BIT(I0M) | SYSREG_BIT(I1M) - | SYSREG_BIT(I2M) | SYSREG_BIT(I3M)); - sysreg_write(SR, status_reg); - - irq_exit(); - - set_irq_regs(old_regs); -} - -void __init init_IRQ(void) -{ - extern void _evba(void); - extern void irq_level0(void); - struct resource *regs; - struct clk *pclk; - unsigned int i; - u32 offset, readback; - - regs = platform_get_resource(&at32_intc0_device, IORESOURCE_MEM, 0); - if (!regs) { - printk(KERN_EMERG "intc: no mmio resource defined\n"); - goto fail; - } - pclk = clk_get(&at32_intc0_device.dev, "pclk"); - if (IS_ERR(pclk)) { - printk(KERN_EMERG "intc: no clock defined\n"); - goto fail; - } - - clk_enable(pclk); - - intc0.regs = ioremap(regs->start, resource_size(regs)); - if (!intc0.regs) { - printk(KERN_EMERG "intc: failed to map registers (0x%08lx)\n", - (unsigned long)regs->start); - goto fail; - } - - /* - * Initialize all interrupts to level 0 (lowest priority). The - * priority level may be changed by calling - * irq_set_priority(). - * - */ - offset = (unsigned long)&irq_level0 - (unsigned long)&_evba; - for (i = 0; i < NR_INTERNAL_IRQS; i++) { - intc_writel(&intc0, INTPR0 + 4 * i, offset); - readback = intc_readl(&intc0, INTPR0 + 4 * i); - if (readback == offset) - irq_set_chip_and_handler(i, &intc0.chip, - handle_simple_irq); - } - - /* Unmask all interrupt levels */ - sysreg_write(SR, (sysreg_read(SR) - & ~(SR_I3M | SR_I2M | SR_I1M | SR_I0M))); - - return; - -fail: - panic("Interrupt controller initialization failed!\n"); -} - -#ifdef CONFIG_PM -void intc_set_suspend_handler(unsigned long offset) -{ - intc0.suspend_ipr = offset; -} - -static int intc_suspend(void) -{ - int i; - - if (unlikely(!irqs_disabled())) { - pr_err("intc_suspend: called with interrupts enabled\n"); - return -EINVAL; - } - - if (unlikely(!intc0.suspend_ipr)) { - pr_err("intc_suspend: suspend_ipr not initialized\n"); - return -EINVAL; - } - - for (i = 0; i < 64; i++) { - intc0.saved_ipr[i] = intc_readl(&intc0, INTPR0 + 4 * i); - intc_writel(&intc0, INTPR0 + 4 * i, intc0.suspend_ipr); - } - - return 0; -} - -static void intc_resume(void) -{ - int i; - - for (i = 0; i < 64; i++) - intc_writel(&intc0, INTPR0 + 4 * i, intc0.saved_ipr[i]); -} -#else -#define intc_suspend NULL -#define intc_resume NULL -#endif - -static struct syscore_ops intc_syscore_ops = { - .suspend = intc_suspend, - .resume = intc_resume, -}; - -static int __init intc_init_syscore(void) -{ - register_syscore_ops(&intc_syscore_ops); - - return 0; -} -device_initcall(intc_init_syscore); - -unsigned long intc_get_pending(unsigned int group) -{ - return intc_readl(&intc0, INTREQ0 + 4 * group); -} -EXPORT_SYMBOL_GPL(intc_get_pending); |