mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-22 12:14:01 +08:00
cbd1de2e8e
Extract xtensa built-in interrupt controller implementation from xtensa/kernel/irq.c and move it to other irqchips, providing way to instantiate it from the device tree. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
109 lines
2.7 KiB
C
109 lines
2.7 KiB
C
/*
|
|
* Xtensa built-in interrupt controller
|
|
*
|
|
* Copyright (C) 2002 - 2013 Tensilica, Inc.
|
|
* Copyright (C) 1992, 1998 Linus Torvalds, Ingo Molnar
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
|
* License. See the file "COPYING" in the main directory of this archive
|
|
* for more details.
|
|
*
|
|
* Chris Zankel <chris@zankel.net>
|
|
* Kevin Chea
|
|
*/
|
|
|
|
#include <linux/interrupt.h>
|
|
#include <linux/irqdomain.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/of.h>
|
|
|
|
#include "irqchip.h"
|
|
|
|
unsigned int cached_irq_mask;
|
|
|
|
/*
|
|
* Device Tree IRQ specifier translation function which works with one or
|
|
* two cell bindings. First cell value maps directly to the hwirq number.
|
|
* Second cell if present specifies whether hwirq number is external (1) or
|
|
* internal (0).
|
|
*/
|
|
static int xtensa_pic_irq_domain_xlate(struct irq_domain *d,
|
|
struct device_node *ctrlr,
|
|
const u32 *intspec, unsigned int intsize,
|
|
unsigned long *out_hwirq, unsigned int *out_type)
|
|
{
|
|
return xtensa_irq_domain_xlate(intspec, intsize,
|
|
intspec[0], intspec[0],
|
|
out_hwirq, out_type);
|
|
}
|
|
|
|
static const struct irq_domain_ops xtensa_irq_domain_ops = {
|
|
.xlate = xtensa_pic_irq_domain_xlate,
|
|
.map = xtensa_irq_map,
|
|
};
|
|
|
|
static void xtensa_irq_mask(struct irq_data *d)
|
|
{
|
|
cached_irq_mask &= ~(1 << d->hwirq);
|
|
set_sr(cached_irq_mask, intenable);
|
|
}
|
|
|
|
static void xtensa_irq_unmask(struct irq_data *d)
|
|
{
|
|
cached_irq_mask |= 1 << d->hwirq;
|
|
set_sr(cached_irq_mask, intenable);
|
|
}
|
|
|
|
static void xtensa_irq_enable(struct irq_data *d)
|
|
{
|
|
variant_irq_enable(d->hwirq);
|
|
xtensa_irq_unmask(d);
|
|
}
|
|
|
|
static void xtensa_irq_disable(struct irq_data *d)
|
|
{
|
|
xtensa_irq_mask(d);
|
|
variant_irq_disable(d->hwirq);
|
|
}
|
|
|
|
static void xtensa_irq_ack(struct irq_data *d)
|
|
{
|
|
set_sr(1 << d->hwirq, intclear);
|
|
}
|
|
|
|
static int xtensa_irq_retrigger(struct irq_data *d)
|
|
{
|
|
set_sr(1 << d->hwirq, intset);
|
|
return 1;
|
|
}
|
|
|
|
static struct irq_chip xtensa_irq_chip = {
|
|
.name = "xtensa",
|
|
.irq_enable = xtensa_irq_enable,
|
|
.irq_disable = xtensa_irq_disable,
|
|
.irq_mask = xtensa_irq_mask,
|
|
.irq_unmask = xtensa_irq_unmask,
|
|
.irq_ack = xtensa_irq_ack,
|
|
.irq_retrigger = xtensa_irq_retrigger,
|
|
};
|
|
|
|
int __init xtensa_pic_init_legacy(struct device_node *interrupt_parent)
|
|
{
|
|
struct irq_domain *root_domain =
|
|
irq_domain_add_legacy(NULL, NR_IRQS, 0, 0,
|
|
&xtensa_irq_domain_ops, &xtensa_irq_chip);
|
|
irq_set_default_host(root_domain);
|
|
return 0;
|
|
}
|
|
|
|
static int __init xtensa_pic_init(struct device_node *np,
|
|
struct device_node *interrupt_parent)
|
|
{
|
|
struct irq_domain *root_domain =
|
|
irq_domain_add_linear(np, NR_IRQS, &xtensa_irq_domain_ops,
|
|
&xtensa_irq_chip);
|
|
irq_set_default_host(root_domain);
|
|
return 0;
|
|
}
|
|
IRQCHIP_DECLARE(xtensa_irq_chip, "cdns,xtensa-pic", xtensa_pic_init);
|