diff options
Diffstat (limited to 'target/linux/amazon-2.6/files/arch/mips/amazon/interrupt.c')
| -rw-r--r-- | target/linux/amazon-2.6/files/arch/mips/amazon/interrupt.c | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/target/linux/amazon-2.6/files/arch/mips/amazon/interrupt.c b/target/linux/amazon-2.6/files/arch/mips/amazon/interrupt.c deleted file mode 100644 index 5e34e0577..000000000 --- a/target/linux/amazon-2.6/files/arch/mips/amazon/interrupt.c +++ /dev/null @@ -1,186 +0,0 @@ -/* - * Gary Jennejohn (C) 2003 <gj@denx.de> - * Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org> - * Copyright (C) 2007 John Crispin <blogic@openwrt.org> - * - * This program is free software; you can distribute it and/or modify it - * under the terms of the GNU General Public License (Version 2) as - * published by the Free Software Foundation. - * - * This program is distributed in the hope 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. - * - * Routines for generic manipulation of the interrupts found on the - * AMAZON boards. - */ - -#include <linux/init.h> -#include <linux/sched.h> -#include <linux/slab.h> -#include <linux/interrupt.h> -#include <linux/kernel_stat.h> -#include <linux/module.h> - -#include <asm/amazon/amazon.h> -#include <asm/amazon/irq.h> -#include <asm/bootinfo.h> -#include <asm/irq_cpu.h> -#include <asm/irq.h> -#include <asm/time.h> - -static void amazon_disable_irq(unsigned int irq_nr) -{ - int i; - u32 amazon_ier = AMAZON_ICU_IM0_IER; - - if (irq_nr <= INT_NUM_IM0_IRL11 && irq_nr >= INT_NUM_IM0_IRL0) - amazon_writel(amazon_readl(amazon_ier) & (~(AMAZON_DMA_H_MASK)), amazon_ier); - else { - irq_nr -= INT_NUM_IRQ0; - for (i = 0; i <= 4; i++) - { - if (irq_nr <= 31) - amazon_writel(amazon_readl(amazon_ier) & ~(1 << irq_nr ), amazon_ier); - amazon_ier += 0x10; - irq_nr -= 32; - } - } -} - -static void amazon_mask_and_ack_irq(unsigned int irq_nr) -{ - int i; - u32 amazon_ier = AMAZON_ICU_IM0_IER; - u32 amazon_isr = AMAZON_ICU_IM0_ISR; - - if (irq_nr <= INT_NUM_IM0_IRL11 && irq_nr >= INT_NUM_IM0_IRL0){ - amazon_writel(amazon_readl(amazon_ier) & (~(AMAZON_DMA_H_MASK)), amazon_ier); - amazon_writel(AMAZON_DMA_H_MASK, amazon_isr); - } else { - irq_nr -= INT_NUM_IRQ0; - for (i = 0; i <= 4; i++) - { - if (irq_nr <= 31){ - amazon_writel(amazon_readl(amazon_ier) & ~(1 << irq_nr ), amazon_ier); - amazon_writel((1 << irq_nr ), amazon_isr); - } - amazon_ier += 0x10; - amazon_isr += 0x10; - irq_nr -= 32; - } - } -} - -static void amazon_enable_irq(unsigned int irq_nr) -{ - int i; - u32 amazon_ier = AMAZON_ICU_IM0_IER; - - if (irq_nr <= INT_NUM_IM0_IRL11 && irq_nr >= INT_NUM_IM0_IRL0) - amazon_writel(amazon_readl(amazon_ier) | AMAZON_DMA_H_MASK, amazon_ier); - else { - irq_nr -= INT_NUM_IRQ0; - for (i = 0; i <= 4; i++) - { - if (irq_nr <= 31) - amazon_writel(amazon_readl(amazon_ier) | (1 << irq_nr ), amazon_ier); - amazon_ier += 0x10; - irq_nr -= 32; - } - } -} - -static unsigned int amazon_startup_irq(unsigned int irq) -{ - amazon_enable_irq(irq); - return 0; -} - -static void amazon_end_irq(unsigned int irq) -{ - if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS))) { - amazon_enable_irq(irq); - } -} - -static struct hw_interrupt_type amazon_irq_type = { - "AMAZON", - .startup = amazon_startup_irq, - .enable = amazon_enable_irq, - .disable = amazon_disable_irq, - .unmask = amazon_enable_irq, - .ack = amazon_mask_and_ack_irq, - .mask = amazon_disable_irq, - .mask_ack = amazon_mask_and_ack_irq, - .end = amazon_end_irq -}; - -/* Cascaded interrupts from IM0-4 */ -static inline void amazon_hw_irqdispatch(u8 line) -{ - u32 irq; - - irq = (amazon_readl(AMAZON_ICU_IM_VEC) >> (line * 5)) & AMAZON_ICU_IM0_VEC_MASK; - if (line == 0 && irq <= 11 && irq >= 0) { - //DMA fixed to IM0_IRL0 - irq = 0; - } - do_IRQ(irq + INT_NUM_IRQ0 + (line * 32)); -} - -asmlinkage void plat_irq_dispatch(void) -{ - unsigned int pending = read_c0_status() & read_c0_cause() & ST0_IM; - if (pending & CAUSEF_IP7){ - do_IRQ(MIPS_CPU_TIMER_IRQ); - goto out; - } else { - unsigned int i; - for (i = 0; i <= 4; i++) - { - if(pending & (CAUSEF_IP2 << i)){ - amazon_hw_irqdispatch(i); - goto out; - } - } - } - printk("Spurious IRQ: CAUSE=0x%08x\n", read_c0_status()); -out: - return; -} - -static struct irqaction cascade = { - .handler = no_action, - .flags = SA_INTERRUPT, - .name = "cascade", -}; - -void __init arch_init_irq(void) -{ - int i; - - /* mask all interrupt sources */ - for(i = 0; i <= 4; i++){ - amazon_writel(0, AMAZON_ICU_IM0_IER + (i * 0x10)); - } - - mips_cpu_irq_init(); - - /* set up irq cascade */ - for (i = 2; i <= 6; i++) { - setup_irq(i, &cascade); - } - - for (i = INT_NUM_IRQ0; i <= INT_NUM_IM4_IRL31; i++) { - irq_desc[i].status = IRQ_DISABLED; - irq_desc[i].action = 0; - irq_desc[i].depth = 1; - set_irq_chip(i, &amazon_irq_type); - } -} |