+++ /dev/null
-/*
- * linux/arch/arm/mach-at91rm9200/irq.c
- *
- * Copyright (C) 2004 SAN People
- * Copyright (C) 2004 ATMEL
- * Copyright (C) Rick Bronson
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/mm.h>
-#include <linux/types.h>
-
-#include <asm/hardware.h>
-#include <asm/irq.h>
-#include <asm/mach-types.h>
-#include <asm/setup.h>
-
-#include <asm/mach/arch.h>
-#include <asm/mach/irq.h>
-#include <asm/mach/map.h>
-
-
-static void at91_aic_mask_irq(unsigned int irq)
-{
- /* Disable interrupt on AIC */
- at91_sys_write(AT91_AIC_IDCR, 1 << irq);
-}
-
-static void at91_aic_unmask_irq(unsigned int irq)
-{
- /* Enable interrupt on AIC */
- at91_sys_write(AT91_AIC_IECR, 1 << irq);
-}
-
-unsigned int at91_extern_irq;
-
-#define is_extern_irq(irq) ((1 << (irq)) & at91_extern_irq)
-
-static int at91_aic_set_type(unsigned irq, unsigned type)
-{
- unsigned int smr, srctype;
-
- switch (type) {
- case IRQT_HIGH:
- srctype = AT91_AIC_SRCTYPE_HIGH;
- break;
- case IRQT_RISING:
- srctype = AT91_AIC_SRCTYPE_RISING;
- break;
- case IRQT_LOW:
- if ((irq == AT91_ID_FIQ) || is_extern_irq(irq)) /* only supported on external interrupts */
- srctype = AT91_AIC_SRCTYPE_LOW;
- else
- return -EINVAL;
- break;
- case IRQT_FALLING:
- if ((irq == AT91_ID_FIQ) || is_extern_irq(irq)) /* only supported on external interrupts */
- srctype = AT91_AIC_SRCTYPE_FALLING;
- else
- return -EINVAL;
- break;
- default:
- return -EINVAL;
- }
-
- smr = at91_sys_read(AT91_AIC_SMR(irq)) & ~AT91_AIC_SRCTYPE;
- at91_sys_write(AT91_AIC_SMR(irq), smr | srctype);
- return 0;
-}
-
-#ifdef CONFIG_PM
-
-static u32 wakeups;
-static u32 backups;
-
-static int at91_aic_set_wake(unsigned irq, unsigned value)
-{
- if (unlikely(irq >= 32))
- return -EINVAL;
-
- if (value)
- wakeups |= (1 << irq);
- else
- wakeups &= ~(1 << irq);
-
- return 0;
-}
-
-void at91_irq_suspend(void)
-{
- backups = at91_sys_read(AT91_AIC_IMR);
- at91_sys_write(AT91_AIC_IDCR, backups);
- at91_sys_write(AT91_AIC_IECR, wakeups);
-}
-
-void at91_irq_resume(void)
-{
- at91_sys_write(AT91_AIC_IDCR, wakeups);
- at91_sys_write(AT91_AIC_IECR, backups);
-}
-
-#else
-#define at91_aic_set_wake NULL
-#endif
-
-static struct irq_chip at91_aic_chip = {
- .name = "AIC",
- .ack = at91_aic_mask_irq,
- .mask = at91_aic_mask_irq,
- .unmask = at91_aic_unmask_irq,
- .set_type = at91_aic_set_type,
- .set_wake = at91_aic_set_wake,
-};
-
-/*
- * Initialize the AIC interrupt controller.
- */
-void __init at91_aic_init(unsigned int priority[NR_AIC_IRQS])
-{
- unsigned int i;
-
- /*
- * The IVR is used by macro get_irqnr_and_base to read and verify.
- * The irq number is NR_AIC_IRQS when a spurious interrupt has occurred.
- */
- for (i = 0; i < NR_AIC_IRQS; i++) {
- /* Put irq number in Source Vector Register: */
- at91_sys_write(AT91_AIC_SVR(i), i);
- /* Active Low interrupt, with the specified priority */
- at91_sys_write(AT91_AIC_SMR(i), AT91_AIC_SRCTYPE_LOW | priority[i]);
-
- set_irq_chip(i, &at91_aic_chip);
- set_irq_handler(i, handle_level_irq);
- set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
-
- /* Perform 8 End Of Interrupt Command to make sure AIC will not Lock out nIRQ */
- if (i < 8)
- at91_sys_write(AT91_AIC_EOICR, 0);
- }
-
- /*
- * Spurious Interrupt ID in Spurious Vector Register is NR_AIC_IRQS
- * When there is no current interrupt, the IRQ Vector Register reads the value stored in AIC_SPU
- */
- at91_sys_write(AT91_AIC_SPU, NR_AIC_IRQS);
-
- /* No debugging in AIC: Debug (Protect) Control Register */
- at91_sys_write(AT91_AIC_DCR, 0);
-
- /* Disable and clear all interrupts initially */
- at91_sys_write(AT91_AIC_IDCR, 0xFFFFFFFF);
- at91_sys_write(AT91_AIC_ICCR, 0xFFFFFFFF);
-}
git.openpandora.org / pandora-kernel.git / blobdiff