1/*
 2 * arch/arm/mach-orion5x/irq.c
 3 *
 4 * Core IRQ functions for Marvell Orion System On Chip
 5 *
 6 * Maintainer: Tzachi Perelstein <tzachi@marvell.com>
 7 *
 8 * This file is licensed under the terms of the GNU General Public
 9 * License version 2.  This program is licensed "as is" without any
10 * warranty of any kind, whether express or implied.
11 */
12#include <linux/gpio.h>
13#include <linux/kernel.h>
 
14#include <linux/irq.h>
15#include <linux/io.h>
16#include <plat/orion-gpio.h>
 
17#include <plat/irq.h>
18#include <asm/exception.h>
19#include "bridge-regs.h"
20#include "common.h"
21
22static int __initdata gpio0_irqs[4] = {
23	IRQ_ORION5X_GPIO_0_7,
24	IRQ_ORION5X_GPIO_8_15,
25	IRQ_ORION5X_GPIO_16_23,
26	IRQ_ORION5X_GPIO_24_31,
27};
28
29asmlinkage void
30__exception_irq_entry orion5x_legacy_handle_irq(struct pt_regs *regs)
31{
32	u32 stat;
33
34	stat = readl_relaxed(MAIN_IRQ_CAUSE);
35	stat &= readl_relaxed(MAIN_IRQ_MASK);
36	if (stat) {
37		unsigned int hwirq = 1 + __fls(stat);
38		handle_IRQ(hwirq, regs);
39		return;
40	}
41}
42
43void __init orion5x_init_irq(void)
44{
45	orion_irq_init(1, MAIN_IRQ_MASK);
46
47	set_handle_irq(orion5x_legacy_handle_irq);
48
49	/*
50	 * Initialize gpiolib for GPIOs 0-31.
51	 */
52	orion_gpio_init(NULL, 0, 32, GPIO_VIRT_BASE, 0,
53			IRQ_ORION5X_GPIO_START, gpio0_irqs);
 
 
 
54}

 1/*
 2 * arch/arm/mach-orion5x/irq.c
 3 *
 4 * Core IRQ functions for Marvell Orion System On Chip
 5 *
 6 * Maintainer: Tzachi Perelstein <tzachi@marvell.com>
 7 *
 8 * This file is licensed under the terms of the GNU General Public
 9 * License version 2.  This program is licensed "as is" without any
10 * warranty of any kind, whether express or implied.
11 */
12
13#include <linux/kernel.h>
14#include <linux/init.h>
15#include <linux/irq.h>
16#include <linux/io.h>
17#include <asm/gpio.h>
18#include <mach/bridge-regs.h>
19#include <plat/irq.h>
 
 
20#include "common.h"
21
22static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
 
 
 
 
 
 
 
 
23{
24	BUG_ON(irq < IRQ_ORION5X_GPIO_0_7 || irq > IRQ_ORION5X_GPIO_24_31);
25
26	orion_gpio_irq_handler((irq - IRQ_ORION5X_GPIO_0_7) << 3);
 
 
 
 
 
 
27}
28
29void __init orion5x_init_irq(void)
30{
31	orion_irq_init(0, (void __iomem *)MAIN_IRQ_MASK);
 
 
32
33	/*
34	 * Initialize gpiolib for GPIOs 0-31.
35	 */
36	orion_gpio_init(0, 32, GPIO_VIRT_BASE, 0, IRQ_ORION5X_GPIO_START);
37	irq_set_chained_handler(IRQ_ORION5X_GPIO_0_7, gpio_irq_handler);
38	irq_set_chained_handler(IRQ_ORION5X_GPIO_8_15, gpio_irq_handler);
39	irq_set_chained_handler(IRQ_ORION5X_GPIO_16_23, gpio_irq_handler);
40	irq_set_chained_handler(IRQ_ORION5X_GPIO_24_31, gpio_irq_handler);
41}