diff options
Diffstat (limited to 'arch/arm/mach-at91rm9200/irq.c')
| -rw-r--r-- | arch/arm/mach-at91rm9200/irq.c | 168 |
1 files changed, 0 insertions, 168 deletions
diff --git a/arch/arm/mach-at91rm9200/irq.c b/arch/arm/mach-at91rm9200/irq.c deleted file mode 100644 index 2148daafd29c..000000000000 --- a/arch/arm/mach-at91rm9200/irq.c +++ /dev/null @@ -1,168 +0,0 @@ -/* - * 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); -} |