mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 11:44:01 +08:00
0c92e830bd
Add support for the IO-Data GLAN Tank, from Martin Michlmayr. Signed-off-by: Martin Michlmayr <tbm@cyrius.com> Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
77 lines
1.5 KiB
C
77 lines
1.5 KiB
C
/*
|
|
* arch/arm/mach-iop32x/irq.c
|
|
*
|
|
* Generic IOP32X IRQ handling functionality
|
|
*
|
|
* Author: Rory Bolt <rorybolt@pacbell.net>
|
|
* Copyright (C) 2002 Rory Bolt
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/list.h>
|
|
#include <asm/mach/irq.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/hardware.h>
|
|
#include <asm/mach-types.h>
|
|
|
|
static u32 iop32x_mask;
|
|
|
|
static inline void intctl_write(u32 val)
|
|
{
|
|
iop3xx_cp6_enable();
|
|
asm volatile("mcr p6, 0, %0, c0, c0, 0" : : "r" (val));
|
|
iop3xx_cp6_disable();
|
|
}
|
|
|
|
static inline void intstr_write(u32 val)
|
|
{
|
|
iop3xx_cp6_enable();
|
|
asm volatile("mcr p6, 0, %0, c4, c0, 0" : : "r" (val));
|
|
iop3xx_cp6_disable();
|
|
}
|
|
|
|
static void
|
|
iop32x_irq_mask(unsigned int irq)
|
|
{
|
|
iop32x_mask &= ~(1 << irq);
|
|
intctl_write(iop32x_mask);
|
|
}
|
|
|
|
static void
|
|
iop32x_irq_unmask(unsigned int irq)
|
|
{
|
|
iop32x_mask |= 1 << irq;
|
|
intctl_write(iop32x_mask);
|
|
}
|
|
|
|
struct irq_chip ext_chip = {
|
|
.name = "IOP32x",
|
|
.ack = iop32x_irq_mask,
|
|
.mask = iop32x_irq_mask,
|
|
.unmask = iop32x_irq_unmask,
|
|
};
|
|
|
|
void __init iop32x_init_irq(void)
|
|
{
|
|
int i;
|
|
|
|
intctl_write(0);
|
|
intstr_write(0);
|
|
if (machine_is_glantank() ||
|
|
machine_is_iq80321() ||
|
|
machine_is_iq31244() ||
|
|
machine_is_n2100())
|
|
*IOP3XX_PCIIRSR = 0x0f;
|
|
|
|
for (i = 0; i < NR_IRQS; i++) {
|
|
set_irq_chip(i, &ext_chip);
|
|
set_irq_handler(i, do_level_IRQ);
|
|
set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
|
|
}
|
|
}
|