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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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364e386917
Use handle_domain_irq instead of handle_IRQ to automatically map hardware irq number to virq. Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
179 lines
3.6 KiB
C
179 lines
3.6 KiB
C
/*
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* linux/arch/arm/mach-sa1100/irq.c
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*
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* Copyright (C) 1999-2001 Nicolas Pitre
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*
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* Generic IRQ handling for the SA11x0, GPIO 11-27 IRQ demultiplexing.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/irq.h>
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#include <linux/irqdomain.h>
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#include <linux/ioport.h>
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#include <linux/syscore_ops.h>
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#include <mach/hardware.h>
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#include <mach/irqs.h>
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#include <asm/mach/irq.h>
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#include <asm/exception.h>
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#include "generic.h"
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/*
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* We don't need to ACK IRQs on the SA1100 unless they're GPIOs
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* this is for internal IRQs i.e. from IRQ LCD to RTCAlrm.
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*/
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static void sa1100_mask_irq(struct irq_data *d)
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{
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ICMR &= ~BIT(d->hwirq);
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}
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static void sa1100_unmask_irq(struct irq_data *d)
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{
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ICMR |= BIT(d->hwirq);
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}
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/*
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* Apart form GPIOs, only the RTC alarm can be a wakeup event.
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*/
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static int sa1100_set_wake(struct irq_data *d, unsigned int on)
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{
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if (BIT(d->hwirq) == IC_RTCAlrm) {
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if (on)
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PWER |= PWER_RTC;
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else
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PWER &= ~PWER_RTC;
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return 0;
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}
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return -EINVAL;
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}
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static struct irq_chip sa1100_normal_chip = {
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.name = "SC",
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.irq_ack = sa1100_mask_irq,
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.irq_mask = sa1100_mask_irq,
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.irq_unmask = sa1100_unmask_irq,
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.irq_set_wake = sa1100_set_wake,
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};
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static int sa1100_normal_irqdomain_map(struct irq_domain *d,
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unsigned int irq, irq_hw_number_t hwirq)
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{
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irq_set_chip_and_handler(irq, &sa1100_normal_chip,
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handle_level_irq);
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set_irq_flags(irq, IRQF_VALID);
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return 0;
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}
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static struct irq_domain_ops sa1100_normal_irqdomain_ops = {
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.map = sa1100_normal_irqdomain_map,
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.xlate = irq_domain_xlate_onetwocell,
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};
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static struct irq_domain *sa1100_normal_irqdomain;
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static struct resource irq_resource =
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DEFINE_RES_MEM_NAMED(0x90050000, SZ_64K, "irqs");
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static struct sa1100irq_state {
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unsigned int saved;
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unsigned int icmr;
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unsigned int iclr;
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unsigned int iccr;
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} sa1100irq_state;
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static int sa1100irq_suspend(void)
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{
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struct sa1100irq_state *st = &sa1100irq_state;
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st->saved = 1;
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st->icmr = ICMR;
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st->iclr = ICLR;
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st->iccr = ICCR;
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/*
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* Disable all GPIO-based interrupts.
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*/
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ICMR &= ~(IC_GPIO11_27|IC_GPIO10|IC_GPIO9|IC_GPIO8|IC_GPIO7|
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IC_GPIO6|IC_GPIO5|IC_GPIO4|IC_GPIO3|IC_GPIO2|
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IC_GPIO1|IC_GPIO0);
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return 0;
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}
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static void sa1100irq_resume(void)
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{
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struct sa1100irq_state *st = &sa1100irq_state;
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if (st->saved) {
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ICCR = st->iccr;
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ICLR = st->iclr;
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ICMR = st->icmr;
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}
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}
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static struct syscore_ops sa1100irq_syscore_ops = {
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.suspend = sa1100irq_suspend,
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.resume = sa1100irq_resume,
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};
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static int __init sa1100irq_init_devicefs(void)
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{
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register_syscore_ops(&sa1100irq_syscore_ops);
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return 0;
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}
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device_initcall(sa1100irq_init_devicefs);
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static asmlinkage void __exception_irq_entry
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sa1100_handle_irq(struct pt_regs *regs)
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{
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uint32_t icip, icmr, mask;
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do {
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icip = (ICIP);
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icmr = (ICMR);
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mask = icip & icmr;
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if (mask == 0)
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break;
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handle_domain_irq(sa1100_normal_irqdomain,
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ffs(mask) - 1, regs);
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} while (1);
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}
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void __init sa1100_init_irq(void)
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{
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request_resource(&iomem_resource, &irq_resource);
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/* disable all IRQs */
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ICMR = 0;
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/* all IRQs are IRQ, not FIQ */
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ICLR = 0;
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/*
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* Whatever the doc says, this has to be set for the wait-on-irq
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* instruction to work... on a SA1100 rev 9 at least.
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*/
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ICCR = 1;
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sa1100_normal_irqdomain = irq_domain_add_simple(NULL,
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32, IRQ_GPIO0_SC,
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&sa1100_normal_irqdomain_ops, NULL);
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set_handle_irq(sa1100_handle_irq);
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sa1100_init_gpio();
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}
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