forked from Minki/linux
a636cd6c42
Based on 1 normalized pattern(s): licensed under gplv2 or later extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 118 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Jilayne Lovejoy <opensource@jilayne.com> Reviewed-by: Steve Winslow <swinslow@gmail.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190519154040.961286471@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
135 lines
3.6 KiB
C
135 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* interrupt controller support for CSR SiRFprimaII
|
|
*
|
|
* Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/io.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/of.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/irqchip.h>
|
|
#include <linux/irqdomain.h>
|
|
#include <linux/syscore_ops.h>
|
|
#include <asm/mach/irq.h>
|
|
#include <asm/exception.h>
|
|
|
|
#define SIRFSOC_INT_RISC_MASK0 0x0018
|
|
#define SIRFSOC_INT_RISC_MASK1 0x001C
|
|
#define SIRFSOC_INT_RISC_LEVEL0 0x0020
|
|
#define SIRFSOC_INT_RISC_LEVEL1 0x0024
|
|
#define SIRFSOC_INIT_IRQ_ID 0x0038
|
|
#define SIRFSOC_INT_BASE_OFFSET 0x0004
|
|
|
|
#define SIRFSOC_NUM_IRQS 64
|
|
#define SIRFSOC_NUM_BANKS (SIRFSOC_NUM_IRQS / 32)
|
|
|
|
static struct irq_domain *sirfsoc_irqdomain;
|
|
|
|
static void __iomem *sirfsoc_irq_get_regbase(void)
|
|
{
|
|
return (void __iomem __force *)sirfsoc_irqdomain->host_data;
|
|
}
|
|
|
|
static __init void sirfsoc_alloc_gc(void __iomem *base)
|
|
{
|
|
unsigned int clr = IRQ_NOREQUEST | IRQ_NOPROBE | IRQ_NOAUTOEN;
|
|
unsigned int set = IRQ_LEVEL;
|
|
struct irq_chip_generic *gc;
|
|
struct irq_chip_type *ct;
|
|
int i;
|
|
|
|
irq_alloc_domain_generic_chips(sirfsoc_irqdomain, 32, 1, "irq_sirfsoc",
|
|
handle_level_irq, clr, set,
|
|
IRQ_GC_INIT_MASK_CACHE);
|
|
|
|
for (i = 0; i < SIRFSOC_NUM_BANKS; i++) {
|
|
gc = irq_get_domain_generic_chip(sirfsoc_irqdomain, i * 32);
|
|
gc->reg_base = base + i * SIRFSOC_INT_BASE_OFFSET;
|
|
ct = gc->chip_types;
|
|
ct->chip.irq_mask = irq_gc_mask_clr_bit;
|
|
ct->chip.irq_unmask = irq_gc_mask_set_bit;
|
|
ct->regs.mask = SIRFSOC_INT_RISC_MASK0;
|
|
}
|
|
}
|
|
|
|
static void __exception_irq_entry sirfsoc_handle_irq(struct pt_regs *regs)
|
|
{
|
|
void __iomem *base = sirfsoc_irq_get_regbase();
|
|
u32 irqstat;
|
|
|
|
irqstat = readl_relaxed(base + SIRFSOC_INIT_IRQ_ID);
|
|
handle_domain_irq(sirfsoc_irqdomain, irqstat & 0xff, regs);
|
|
}
|
|
|
|
static int __init sirfsoc_irq_init(struct device_node *np,
|
|
struct device_node *parent)
|
|
{
|
|
void __iomem *base = of_iomap(np, 0);
|
|
if (!base)
|
|
panic("unable to map intc cpu registers\n");
|
|
|
|
sirfsoc_irqdomain = irq_domain_add_linear(np, SIRFSOC_NUM_IRQS,
|
|
&irq_generic_chip_ops, base);
|
|
sirfsoc_alloc_gc(base);
|
|
|
|
writel_relaxed(0, base + SIRFSOC_INT_RISC_LEVEL0);
|
|
writel_relaxed(0, base + SIRFSOC_INT_RISC_LEVEL1);
|
|
|
|
writel_relaxed(0, base + SIRFSOC_INT_RISC_MASK0);
|
|
writel_relaxed(0, base + SIRFSOC_INT_RISC_MASK1);
|
|
|
|
set_handle_irq(sirfsoc_handle_irq);
|
|
|
|
return 0;
|
|
}
|
|
IRQCHIP_DECLARE(sirfsoc_intc, "sirf,prima2-intc", sirfsoc_irq_init);
|
|
|
|
struct sirfsoc_irq_status {
|
|
u32 mask0;
|
|
u32 mask1;
|
|
u32 level0;
|
|
u32 level1;
|
|
};
|
|
|
|
static struct sirfsoc_irq_status sirfsoc_irq_st;
|
|
|
|
static int sirfsoc_irq_suspend(void)
|
|
{
|
|
void __iomem *base = sirfsoc_irq_get_regbase();
|
|
|
|
sirfsoc_irq_st.mask0 = readl_relaxed(base + SIRFSOC_INT_RISC_MASK0);
|
|
sirfsoc_irq_st.mask1 = readl_relaxed(base + SIRFSOC_INT_RISC_MASK1);
|
|
sirfsoc_irq_st.level0 = readl_relaxed(base + SIRFSOC_INT_RISC_LEVEL0);
|
|
sirfsoc_irq_st.level1 = readl_relaxed(base + SIRFSOC_INT_RISC_LEVEL1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void sirfsoc_irq_resume(void)
|
|
{
|
|
void __iomem *base = sirfsoc_irq_get_regbase();
|
|
|
|
writel_relaxed(sirfsoc_irq_st.mask0, base + SIRFSOC_INT_RISC_MASK0);
|
|
writel_relaxed(sirfsoc_irq_st.mask1, base + SIRFSOC_INT_RISC_MASK1);
|
|
writel_relaxed(sirfsoc_irq_st.level0, base + SIRFSOC_INT_RISC_LEVEL0);
|
|
writel_relaxed(sirfsoc_irq_st.level1, base + SIRFSOC_INT_RISC_LEVEL1);
|
|
}
|
|
|
|
static struct syscore_ops sirfsoc_irq_syscore_ops = {
|
|
.suspend = sirfsoc_irq_suspend,
|
|
.resume = sirfsoc_irq_resume,
|
|
};
|
|
|
|
static int __init sirfsoc_irq_pm_init(void)
|
|
{
|
|
if (!sirfsoc_irqdomain)
|
|
return 0;
|
|
|
|
register_syscore_ops(&sirfsoc_irq_syscore_ops);
|
|
return 0;
|
|
}
|
|
device_initcall(sirfsoc_irq_pm_init);
|