82 lines
1.8 KiB
C
82 lines
1.8 KiB
C
|
/*
|
||
|
|
* arch/arm/mach-dove/irq.c
|
||
|
|
*
|
||
|
|
* Dove 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/init.h>
|
||
|
|
#include <linux/irq.h>
|
||
|
|
#include <linux/io.h>
|
||
|
|
#include <asm/exception.h>
|
||
|
|
#include <plat/irq.h>
|
||
|
|
#include <mach/bridge-regs.h>
|
||
|
|
#include <plat/orion-gpio.h>
|
||
|
|
#include "common.h"
|
||
|
|
|
||
|
|
static int __initdata gpio0_irqs[4] = {
|
||
|
|
IRQ_DOVE_GPIO_0_7,
|
||
|
|
IRQ_DOVE_GPIO_8_15,
|
||
|
|
IRQ_DOVE_GPIO_16_23,
|
||
|
|
IRQ_DOVE_GPIO_24_31,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __initdata gpio1_irqs[4] = {
|
||
|
|
IRQ_DOVE_HIGH_GPIO,
|
||
|
|
0,
|
||
|
|
0,
|
||
|
|
0,
|
||
|
|
};
|
||
|
|
|
||
|
|
static int __initdata gpio2_irqs[4] = {
|
||
|
|
0,
|
||
|
|
0,
|
||
|
|
0,
|
||
|
|
0,
|
||
|
|
};
|
||
|
|
|
||
|
|
static void __iomem *dove_irq_base = IRQ_VIRT_BASE;
|
||
|
|
|
||
|
|
static asmlinkage void
|
||
|
|
__exception_irq_entry dove_legacy_handle_irq(struct pt_regs *regs)
|
||
|
|
{
|
||
|
|
u32 stat;
|
||
|
|
|
||
|
|
stat = readl_relaxed(dove_irq_base + IRQ_CAUSE_LOW_OFF);
|
||
|
|
stat &= readl_relaxed(dove_irq_base + IRQ_MASK_LOW_OFF);
|
||
|
|
if (stat) {
|
||
|
|
unsigned int hwirq = 1 + __fls(stat);
|
||
|
|
handle_IRQ(hwirq, regs);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
stat = readl_relaxed(dove_irq_base + IRQ_CAUSE_HIGH_OFF);
|
||
|
|
stat &= readl_relaxed(dove_irq_base + IRQ_MASK_HIGH_OFF);
|
||
|
|
if (stat) {
|
||
|
|
unsigned int hwirq = 33 + __fls(stat);
|
||
|
|
handle_IRQ(hwirq, regs);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void __init dove_init_irq(void)
|
||
|
|
{
|
||
|
|
orion_irq_init(1, IRQ_VIRT_BASE + IRQ_MASK_LOW_OFF);
|
||
|
|
orion_irq_init(33, IRQ_VIRT_BASE + IRQ_MASK_HIGH_OFF);
|
||
|
|
|
||
|
|
set_handle_irq(dove_legacy_handle_irq);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Initialize gpiolib for GPIOs 0-71.
|
||
|
|
*/
|
||
|
|
orion_gpio_init(NULL, 0, 32, DOVE_GPIO_LO_VIRT_BASE, 0,
|
||
|
|
IRQ_DOVE_GPIO_START, gpio0_irqs);
|
||
|
|
|
||
|
|
orion_gpio_init(NULL, 32, 32, DOVE_GPIO_HI_VIRT_BASE, 0,
|
||
|
|
IRQ_DOVE_GPIO_START + 32, gpio1_irqs);
|
||
|
|
|
||
|
|
orion_gpio_init(NULL, 64, 8, DOVE_GPIO2_VIRT_BASE, 0,
|
||
|
|
IRQ_DOVE_GPIO_START + 64, gpio2_irqs);
|
||
|
|
}
|