[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / arm / mach-kirkwood / irq.c

/*
 * arch/arm/mach-kirkwood/irq.c
 *
 * Kirkwood IRQ handling.
 *
 * This file is licensed under the terms of the GNU General Public
 * License version 2.  This program is licensed "as is" without any
 * warranty of any kind, whether express or implied.
 */

#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <mach/bridge-regs.h>
#include <plat/irq.h>
#include <asm/gpio.h>
#include "common.h"

static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
{
	BUG_ON(irq < IRQ_KIRKWOOD_GPIO_LOW_0_7);
	BUG_ON(irq > IRQ_KIRKWOOD_GPIO_HIGH_16_23);

	orion_gpio_irq_handler((irq - IRQ_KIRKWOOD_GPIO_LOW_0_7) << 3);
}

void __init kirkwood_init_irq(void)
{
	int i;

	orion_irq_init(0, (void __iomem *)(IRQ_VIRT_BASE + IRQ_MASK_LOW_OFF));
	orion_irq_init(32, (void __iomem *)(IRQ_VIRT_BASE + IRQ_MASK_HIGH_OFF));

	/*
	 * Mask and clear GPIO IRQ interrupts.
	 */
	writel(0, GPIO_LEVEL_MASK(0));
	writel(0, GPIO_EDGE_MASK(0));
	writel(0, GPIO_EDGE_CAUSE(0));
	writel(0, GPIO_LEVEL_MASK(32));
	writel(0, GPIO_EDGE_MASK(32));
	writel(0, GPIO_EDGE_CAUSE(32));

	for (i = IRQ_KIRKWOOD_GPIO_START; i < NR_IRQS; i++) {
		set_irq_chip(i, &orion_gpio_irq_chip);
		set_irq_handler(i, handle_level_irq);
		irq_desc[i].status |= IRQ_LEVEL;
		set_irq_flags(i, IRQF_VALID);
	}
	set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_0_7, gpio_irq_handler);
	set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_8_15, gpio_irq_handler);
	set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_16_23, gpio_irq_handler);
	set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_24_31, gpio_irq_handler);
	set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_0_7, gpio_irq_handler);
	set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_8_15, gpio_irq_handler);
	set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_16_23, gpio_irq_handler);
}
Commit	Line	Data
651c74c7 SB	1	/*
	2	* arch/arm/mach-kirkwood/irq.c
	3	*
	4	* Kirkwood IRQ handling.
	5	*
	6	* This file is licensed under the terms of the GNU General Public
	7	* License version 2. This program is licensed "as is" without any
	8	* warranty of any kind, whether express or implied.
	9	*/
	10
	11	#include <linux/kernel.h>
	12	#include <linux/init.h>
	13	#include <linux/irq.h>
	14	#include <linux/io.h>
fdd8b079	15	#include <mach/bridge-regs.h>
6f088f1d	16	#include <plat/irq.h>
4c213430	17	#include <asm/gpio.h>
651c74c7 SB	18	#include "common.h"
651c74c7 SB	19
4c213430 LB	20	static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
	21	{
	22	BUG_ON(irq < IRQ_KIRKWOOD_GPIO_LOW_0_7);
	23	BUG_ON(irq > IRQ_KIRKWOOD_GPIO_HIGH_16_23);
	24
	25	orion_gpio_irq_handler((irq - IRQ_KIRKWOOD_GPIO_LOW_0_7) << 3);
	26	}
	27
651c74c7 SB	28	void __init kirkwood_init_irq(void)
651c74c7 SB	29	{
4c213430 LB	30	int i;
4c213430 LB	31
651c74c7 SB	32	orion_irq_init(0, (void __iomem *)(IRQ_VIRT_BASE + IRQ_MASK_LOW_OFF));
651c74c7 SB	33	orion_irq_init(32, (void __iomem *)(IRQ_VIRT_BASE + IRQ_MASK_HIGH_OFF));
4c213430 LB	34
	35	/*
	36	* Mask and clear GPIO IRQ interrupts.
	37	*/
	38	writel(0, GPIO_LEVEL_MASK(0));
	39	writel(0, GPIO_EDGE_MASK(0));
	40	writel(0, GPIO_EDGE_CAUSE(0));
	41	writel(0, GPIO_LEVEL_MASK(32));
	42	writel(0, GPIO_EDGE_MASK(32));
	43	writel(0, GPIO_EDGE_CAUSE(32));
	44
	45	for (i = IRQ_KIRKWOOD_GPIO_START; i < NR_IRQS; i++) {
fd4b9b36	46	set_irq_chip(i, &orion_gpio_irq_chip);
4c213430 LB	47	set_irq_handler(i, handle_level_irq);
	48	irq_desc[i].status \|= IRQ_LEVEL;
	49	set_irq_flags(i, IRQF_VALID);
	50	}
	51	set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_0_7, gpio_irq_handler);
	52	set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_8_15, gpio_irq_handler);
	53	set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_16_23, gpio_irq_handler);
	54	set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_24_31, gpio_irq_handler);
	55	set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_0_7, gpio_irq_handler);
	56	set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_8_15, gpio_irq_handler);
	57	set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_16_23, gpio_irq_handler);
651c74c7	58	}