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Diffstat (limited to 'arch/mips/bcm3384/irq.c')
-rw-r--r--arch/mips/bcm3384/irq.c193
1 files changed, 0 insertions, 193 deletions
diff --git a/arch/mips/bcm3384/irq.c b/arch/mips/bcm3384/irq.c
deleted file mode 100644
index fd94fe849af6..000000000000
--- a/arch/mips/bcm3384/irq.c
+++ /dev/null
@@ -1,193 +0,0 @@
-/*
- * 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.
- *
- * Partially based on arch/mips/ralink/irq.c
- *
- * Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
- * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
- * Copyright (C) 2014 Kevin Cernekee <cernekee@gmail.com>
- */
-
-#include <linux/io.h>
-#include <linux/bitops.h>
-#include <linux/of_platform.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
-#include <linux/irqdomain.h>
-#include <linux/interrupt.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-
-#include <asm/bmips.h>
-#include <asm/irq_cpu.h>
-#include <asm/mipsregs.h>
-
-/* INTC register offsets */
-#define INTC_REG_ENABLE 0x00
-#define INTC_REG_STATUS 0x04
-
-#define MAX_WORDS 2
-#define IRQS_PER_WORD 32
-
-struct bcm3384_intc {
- int n_words;
- void __iomem *reg[MAX_WORDS];
- u32 enable[MAX_WORDS];
- spinlock_t lock;
-};
-
-static void bcm3384_intc_irq_unmask(struct irq_data *d)
-{
- struct bcm3384_intc *priv = d->domain->host_data;
- unsigned long flags;
- int idx = d->hwirq / IRQS_PER_WORD;
- int bit = d->hwirq % IRQS_PER_WORD;
-
- spin_lock_irqsave(&priv->lock, flags);
- priv->enable[idx] |= BIT(bit);
- __raw_writel(priv->enable[idx], priv->reg[idx] + INTC_REG_ENABLE);
- spin_unlock_irqrestore(&priv->lock, flags);
-}
-
-static void bcm3384_intc_irq_mask(struct irq_data *d)
-{
- struct bcm3384_intc *priv = d->domain->host_data;
- unsigned long flags;
- int idx = d->hwirq / IRQS_PER_WORD;
- int bit = d->hwirq % IRQS_PER_WORD;
-
- spin_lock_irqsave(&priv->lock, flags);
- priv->enable[idx] &= ~BIT(bit);
- __raw_writel(priv->enable[idx], priv->reg[idx] + INTC_REG_ENABLE);
- spin_unlock_irqrestore(&priv->lock, flags);
-}
-
-static struct irq_chip bcm3384_intc_irq_chip = {
- .name = "INTC",
- .irq_unmask = bcm3384_intc_irq_unmask,
- .irq_mask = bcm3384_intc_irq_mask,
- .irq_mask_ack = bcm3384_intc_irq_mask,
-};
-
-unsigned int get_c0_compare_int(void)
-{
- return CP0_LEGACY_COMPARE_IRQ;
-}
-
-static void bcm3384_intc_irq_handler(unsigned int irq, struct irq_desc *desc)
-{
- struct irq_domain *domain = irq_get_handler_data(irq);
- struct bcm3384_intc *priv = domain->host_data;
- unsigned long flags;
- unsigned int idx;
-
- for (idx = 0; idx < priv->n_words; idx++) {
- unsigned long pending;
- int hwirq;
-
- spin_lock_irqsave(&priv->lock, flags);
- pending = __raw_readl(priv->reg[idx] + INTC_REG_STATUS) &
- priv->enable[idx];
- spin_unlock_irqrestore(&priv->lock, flags);
-
- for_each_set_bit(hwirq, &pending, IRQS_PER_WORD) {
- generic_handle_irq(irq_find_mapping(domain,
- hwirq + idx * IRQS_PER_WORD));
- }
- }
-}
-
-asmlinkage void plat_irq_dispatch(void)
-{
- unsigned long pending =
- (read_c0_status() & read_c0_cause() & ST0_IM) >> STATUSB_IP0;
- int bit;
-
- for_each_set_bit(bit, &pending, 8)
- do_IRQ(MIPS_CPU_IRQ_BASE + bit);
-}
-
-static int intc_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw)
-{
- irq_set_chip_and_handler(irq, &bcm3384_intc_irq_chip, handle_level_irq);
- return 0;
-}
-
-static const struct irq_domain_ops irq_domain_ops = {
- .xlate = irq_domain_xlate_onecell,
- .map = intc_map,
-};
-
-static int __init ioremap_one_pair(struct bcm3384_intc *priv,
- struct device_node *node,
- int idx)
-{
- struct resource res;
-
- if (of_address_to_resource(node, idx, &res))
- return 0;
-
- if (request_mem_region(res.start, resource_size(&res),
- res.name) < 0)
- pr_err("Failed to request INTC register region\n");
-
- priv->reg[idx] = ioremap_nocache(res.start, resource_size(&res));
- if (!priv->reg[idx])
- panic("Failed to ioremap INTC register range");
-
- /* start up with everything masked before we hook the parent IRQ */
- __raw_writel(0, priv->reg[idx] + INTC_REG_ENABLE);
- priv->enable[idx] = 0;
-
- return IRQS_PER_WORD;
-}
-
-static int __init intc_of_init(struct device_node *node,
- struct device_node *parent)
-{
- struct irq_domain *domain;
- unsigned int parent_irq, n_irqs = 0;
- struct bcm3384_intc *priv;
-
- priv = kzalloc(sizeof(*priv), GFP_KERNEL);
- if (!priv)
- panic("Failed to allocate bcm3384_intc struct");
-
- spin_lock_init(&priv->lock);
-
- parent_irq = irq_of_parse_and_map(node, 0);
- if (!parent_irq)
- panic("Failed to get INTC IRQ");
-
- n_irqs += ioremap_one_pair(priv, node, 0);
- n_irqs += ioremap_one_pair(priv, node, 1);
-
- if (!n_irqs)
- panic("Failed to map INTC registers");
-
- priv->n_words = n_irqs / IRQS_PER_WORD;
- domain = irq_domain_add_linear(node, n_irqs, &irq_domain_ops, priv);
- if (!domain)
- panic("Failed to add irqdomain");
-
- irq_set_chained_handler(parent_irq, bcm3384_intc_irq_handler);
- irq_set_handler_data(parent_irq, domain);
-
- return 0;
-}
-
-static struct of_device_id of_irq_ids[] __initdata = {
- { .compatible = "mti,cpu-interrupt-controller",
- .data = mips_cpu_irq_of_init },
- { .compatible = "brcm,bcm3384-intc",
- .data = intc_of_init },
- {},
-};
-
-void __init arch_init_irq(void)
-{
- bmips_tp1_irqs = 0;
- of_irq_init(of_irq_ids);
-}