1/* 2 * Freescale STMP37XX/STMP378X common interrupt handling code 3 * 4 * Author: Vladislav Buzov <vbuzov@embeddedalley.com> 5 * 6 * Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved. 7 * Copyright 2008 Embedded Alley Solutions, Inc All Rights Reserved. 8 */ 9 10/* 11 * The code contained herein is licensed under the GNU General Public 12 * License. You may obtain a copy of the GNU General Public License 13 * Version 2 or later at the following locations: 14 * 15 * http://www.opensource.org/licenses/gpl-license.html 16 * http://www.gnu.org/copyleft/gpl.html 17 */ 18#include <linux/init.h> 19#include <linux/interrupt.h> 20#include <linux/delay.h> 21#include <linux/irq.h> 22#include <linux/sysdev.h> 23 24#include <mach/stmp3xxx.h> 25#include <mach/platform.h> 26#include <mach/regs-icoll.h> 27 28void __init stmp3xxx_init_irq(struct irq_chip *chip) 29{ 30 unsigned int i, lv; 31 32 /* Reset the interrupt controller */ 33 stmp3xxx_reset_block(REGS_ICOLL_BASE + HW_ICOLL_CTRL, true); 34 35 /* Disable all interrupts initially */ 36 for (i = 0; i < NR_REAL_IRQS; i++) { 37 chip->mask(i); 38 set_irq_chip(i, chip); 39 set_irq_handler(i, handle_level_irq); 40 set_irq_flags(i, IRQF_VALID | IRQF_PROBE); 41 } 42 43 /* Ensure vector is cleared */ 44 for (lv = 0; lv < 4; lv++) 45 __raw_writel(1 << lv, REGS_ICOLL_BASE + HW_ICOLL_LEVELACK); 46 __raw_writel(0, REGS_ICOLL_BASE + HW_ICOLL_VECTOR); 47 48 /* Barrier */ 49 (void)__raw_readl(REGS_ICOLL_BASE + HW_ICOLL_STAT); 50} 51