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 stmp3xxx_init_irq(struct irq_chip * chip)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->irq_mask(irq_get_irq_data(i)); 38 irq_set_chip_and_handler(i, chip, handle_level_irq); 39 set_irq_flags(i, IRQF_VALID | IRQF_PROBE); 40 } 41 42 /* Ensure vector is cleared */ 43 for (lv = 0; lv < 4; lv++) 44 __raw_writel(1 << lv, REGS_ICOLL_BASE + HW_ICOLL_LEVELACK); 45 __raw_writel(0, REGS_ICOLL_BASE + HW_ICOLL_VECTOR); 46 47 /* Barrier */ 48 (void)__raw_readl(REGS_ICOLL_BASE + HW_ICOLL_STAT); 49 } 50 51