+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Realtek RTL83XX architecture specific IRQ handling
- *
- * based on the original BSP
- * Copyright (C) 2006-2012 Tony Wu (tonywu@realtek.com)
- * Copyright (C) 2020 B. Koblitz
- * Copyright (C) 2020 Bert Vermeulen <bert@biot.com>
- * Copyright (C) 2020 John Crispin <john@phrozen.org>
- */
-
-#include <linux/irqchip.h>
-#include <linux/spinlock.h>
-#include <linux/of_address.h>
-#include <asm/irq_cpu.h>
-#include <linux/of_irq.h>
-#include <asm/cevt-r4k.h>
-
-#include <mach-rtl83xx.h>
-#include "irq.h"
-
-#define REALTEK_CPU_IRQ_SHARED0 (MIPS_CPU_IRQ_BASE + 2)
-#define REALTEK_CPU_IRQ_UART (MIPS_CPU_IRQ_BASE + 3)
-#define REALTEK_CPU_IRQ_SWITCH (MIPS_CPU_IRQ_BASE + 4)
-#define REALTEK_CPU_IRQ_SHARED1 (MIPS_CPU_IRQ_BASE + 5)
-#define REALTEK_CPU_IRQ_EXTERNAL (MIPS_CPU_IRQ_BASE + 6)
-#define REALTEK_CPU_IRQ_COUNTER (MIPS_CPU_IRQ_BASE + 7)
-
-#define REG(x) (rtl83xx_ictl_base + x)
-
-extern struct rtl83xx_soc_info soc_info;
-
-static DEFINE_RAW_SPINLOCK(irq_lock);
-static void __iomem *rtl83xx_ictl_base;
-
-static void rtl83xx_ictl_enable_irq(struct irq_data *i)
-{
- unsigned long flags;
- u32 value;
-
- raw_spin_lock_irqsave(&irq_lock, flags);
-
- value = rtl83xx_r32(REG(RTL83XX_ICTL_GIMR));
- value |= BIT(i->hwirq);
- rtl83xx_w32(value, REG(RTL83XX_ICTL_GIMR));
-
- raw_spin_unlock_irqrestore(&irq_lock, flags);
-}
-
-static void rtl83xx_ictl_disable_irq(struct irq_data *i)
-{
- unsigned long flags;
- u32 value;
-
- raw_spin_lock_irqsave(&irq_lock, flags);
-
- value = rtl83xx_r32(REG(RTL83XX_ICTL_GIMR));
- value &= ~BIT(i->hwirq);
- rtl83xx_w32(value, REG(RTL83XX_ICTL_GIMR));
-
- raw_spin_unlock_irqrestore(&irq_lock, flags);
-}
-
-static struct irq_chip rtl83xx_ictl_irq = {
- .name = "RTL83xx",
- .irq_enable = rtl83xx_ictl_enable_irq,
- .irq_disable = rtl83xx_ictl_disable_irq,
- .irq_ack = rtl83xx_ictl_disable_irq,
- .irq_mask = rtl83xx_ictl_disable_irq,
- .irq_unmask = rtl83xx_ictl_enable_irq,
- .irq_eoi = rtl83xx_ictl_enable_irq,
-};
-
-static int intc_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw)
-{
- irq_set_chip_and_handler(hw, &rtl83xx_ictl_irq, handle_level_irq);
-
- return 0;
-}
-
-static const struct irq_domain_ops irq_domain_ops = {
- .map = intc_map,
- .xlate = irq_domain_xlate_onecell,
-};
-
-static void rtl838x_irq_dispatch(struct irq_desc *desc)
-{
- unsigned int pending = rtl83xx_r32(REG(RTL83XX_ICTL_GIMR)) &
- rtl83xx_r32(REG(RTL83XX_ICTL_GISR));
-
- if (pending) {
- struct irq_domain *domain = irq_desc_get_handler_data(desc);
- generic_handle_irq(irq_find_mapping(domain, __ffs(pending)));
- } else {
- spurious_interrupt();
- }
-}
-
-asmlinkage void plat_rtl83xx_irq_dispatch(void)
-{
- unsigned int pending;
-
- pending = read_c0_cause() & read_c0_status() & ST0_IM;
-
- if (pending & CAUSEF_IP7)
- do_IRQ(REALTEK_CPU_IRQ_COUNTER);
-
- else if (pending & CAUSEF_IP6)
- do_IRQ(REALTEK_CPU_IRQ_EXTERNAL);
-
- else if (pending & CAUSEF_IP5)
- do_IRQ(REALTEK_CPU_IRQ_SHARED1);
-
- else if (pending & CAUSEF_IP4)
- do_IRQ(REALTEK_CPU_IRQ_SWITCH);
-
- else if (pending & CAUSEF_IP3)
- do_IRQ(REALTEK_CPU_IRQ_UART);
-
- else if (pending & CAUSEF_IP2)
- do_IRQ(REALTEK_CPU_IRQ_SHARED0);
-
- else
- spurious_interrupt();
-}
-
-static int icu_setup_domain(struct device_node *node)
-{
- struct irq_domain *domain;
-
- domain = irq_domain_add_simple(node, 32, 0,
- &irq_domain_ops, NULL);
- irq_set_chained_handler_and_data(2, rtl838x_irq_dispatch, domain);
- irq_set_chained_handler_and_data(3, rtl838x_irq_dispatch, domain);
- irq_set_chained_handler_and_data(4, rtl838x_irq_dispatch, domain);
- irq_set_chained_handler_and_data(5, rtl838x_irq_dispatch, domain);
-
- rtl83xx_ictl_base = of_iomap(node, 0);
- if (!rtl83xx_ictl_base)
- return -EINVAL;
-
- return 0;
-}
-
-static void __init rtl8380_icu_of_init(struct device_node *node, struct device_node *parent)
-{
- if (icu_setup_domain(node))
- return;
-
- /* Disable all cascaded interrupts */
- rtl83xx_w32(0, REG(RTL83XX_ICTL_GIMR));
-
- /* Set up interrupt routing */
- rtl83xx_w32(RTL83XX_IRR0_SETTING, REG(RTL83XX_IRR0));
- rtl83xx_w32(RTL83XX_IRR1_SETTING, REG(RTL83XX_IRR1));
- rtl83xx_w32(RTL83XX_IRR2_SETTING, REG(RTL83XX_IRR2));
- rtl83xx_w32(RTL83XX_IRR3_SETTING, REG(RTL83XX_IRR3));
-
- /* Clear timer interrupt */
- write_c0_compare(0);
-
- /* Enable all CPU interrupts */
- write_c0_status(read_c0_status() | ST0_IM);
-
- /* Enable timer0 and uart0 interrupts */
- rtl83xx_w32(BIT(RTL83XX_IRQ_TC0) | BIT(RTL83XX_IRQ_UART0), REG(RTL83XX_ICTL_GIMR));
-}
-
-static void __init rtl8390_icu_of_init(struct device_node *node, struct device_node *parent)
-{
- if (icu_setup_domain(node))
- return;
-
- /* Disable all cascaded interrupts */
- rtl83xx_w32(0, REG(RTL83XX_ICTL_GIMR));
-
- /* Set up interrupt routing */
- rtl83xx_w32(RTL83XX_IRR0_SETTING, REG(RTL83XX_IRR0));
- rtl83xx_w32(RTL8390_IRR1_SETTING, REG(RTL83XX_IRR1));
- rtl83xx_w32(RTL83XX_IRR2_SETTING, REG(RTL83XX_IRR2));
- rtl83xx_w32(RTL83XX_IRR3_SETTING, REG(RTL83XX_IRR3));
-
- /* Clear timer interrupt */
- write_c0_compare(0);
-
- /* Enable all CPU interrupts */
- write_c0_status(read_c0_status() | ST0_IM);
-
- /* Enable timer0 and uart0 interrupts */
- rtl83xx_w32(BIT(RTL83XX_IRQ_TC0) | BIT(RTL83XX_IRQ_UART0), REG(RTL83XX_ICTL_GIMR));
-}
-
-static void __init rtl9300_icu_of_init(struct device_node *node, struct device_node *parent)
-{
- pr_info("RTL9300: Setting up IRQs\n");
- if (icu_setup_domain(node))
- return;
-
- /* Disable all cascaded interrupts */
- rtl83xx_w32(0, REG(RTL83XX_ICTL_GIMR));
-
- /* Set up interrupt routing */
- rtl83xx_w32(RTL9300_IRR0_SETTING, REG(RTL83XX_IRR0));
- rtl83xx_w32(RTL9300_IRR1_SETTING, REG(RTL83XX_IRR1));
- rtl83xx_w32(RTL9300_IRR2_SETTING, REG(RTL83XX_IRR2));
- rtl83xx_w32(RTL9300_IRR3_SETTING, REG(RTL83XX_IRR3));
-
- /* Clear timer interrupt */
- write_c0_compare(0);
-
- /* Enable all CPU interrupts */
- write_c0_status(read_c0_status() | ST0_IM);
-}
-
-static struct of_device_id __initdata of_irq_ids[] = {
- { .compatible = "mti,cpu-interrupt-controller", .data = mips_cpu_irq_of_init },
- { .compatible = "realtek,rt8380-intc", .data = rtl8380_icu_of_init },
- { .compatible = "realtek,rt8390-intc", .data = rtl8390_icu_of_init },
- { .compatible = "realtek,rt9300-intc", .data = rtl9300_icu_of_init },
- {},
-};
-
-void __init arch_init_irq(void)
-{
- of_irq_init(of_irq_ids);
-}
projects / openwrt / openwrt.git / blobdiff