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Diffstat (limited to 'arch/arm/mach-omap2/irq.c')
-rw-r--r--arch/arm/mach-omap2/irq.c103
1 files changed, 83 insertions, 20 deletions
diff --git a/arch/arm/mach-omap2/irq.c b/arch/arm/mach-omap2/irq.c
index 1fef061f792..35b8590c322 100644
--- a/arch/arm/mach-omap2/irq.c
+++ b/arch/arm/mach-omap2/irq.c
@@ -11,13 +11,21 @@
* for more details.
*/
#include <linux/kernel.h>
+#include <linux/module.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
-#include <mach/hardware.h>
+
#include <asm/exception.h>
#include <asm/mach/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include "soc.h"
+#include "iomap.h"
+#include "common.h"
/* selected INTC register offsets */
@@ -40,6 +48,8 @@
#define OMAP3_IRQ_BASE OMAP2_L4_IO_ADDRESS(OMAP34XX_IC_BASE)
#define INTCPS_SIR_IRQ_OFFSET 0x0040 /* omap2/3 active interrupt offset */
#define ACTIVEIRQ_MASK 0x7f /* omap2/3 active interrupt bits */
+#define INTCPS_NR_MIR_REGS 3
+#define INTCPS_NR_IRQS 96
/*
* OMAP2 has a number of different interrupt controllers, each interrupt
@@ -57,6 +67,8 @@ static struct omap_irq_bank {
},
};
+static struct irq_domain *domain;
+
/* Structure to save interrupt controller context */
struct omap3_intc_regs {
u32 sysconfig;
@@ -71,12 +83,12 @@ struct omap3_intc_regs {
static void intc_bank_write_reg(u32 val, struct omap_irq_bank *bank, u16 reg)
{
- __raw_writel(val, bank->base_reg + reg);
+ writel_relaxed(val, bank->base_reg + reg);
}
static u32 intc_bank_read_reg(struct omap_irq_bank *bank, u16 reg)
{
- return __raw_readl(bank->base_reg + reg);
+ return readl_relaxed(bank->base_reg + reg);
}
/* XXX: FIQ and additional INTC support (only MPU at the moment) */
@@ -96,9 +108,8 @@ static void __init omap_irq_bank_init_one(struct omap_irq_bank *bank)
unsigned long tmp;
tmp = intc_bank_read_reg(bank, INTC_REVISION) & 0xff;
- printk(KERN_INFO "IRQ: Found an INTC at 0x%p "
- "(revision %ld.%ld) with %d interrupts\n",
- bank->base_reg, tmp >> 4, tmp & 0xf, bank->nr_irqs);
+ pr_info("IRQ: Found an INTC at 0x%p (revision %ld.%ld) with %d interrupts\n",
+ bank->base_reg, tmp >> 4, tmp & 0xf, bank->nr_irqs);
tmp = intc_bank_read_reg(bank, INTC_SYSCONFIG);
tmp |= 1 << 1; /* soft reset */
@@ -139,25 +150,35 @@ omap_alloc_gc(void __iomem *base, unsigned int irq_start, unsigned int num)
ct->chip.irq_ack = omap_mask_ack_irq;
ct->chip.irq_mask = irq_gc_mask_disable_reg;
ct->chip.irq_unmask = irq_gc_unmask_enable_reg;
+ ct->chip.flags |= IRQCHIP_SKIP_SET_WAKE;
- ct->regs.ack = INTC_CONTROL;
ct->regs.enable = INTC_MIR_CLEAR0;
ct->regs.disable = INTC_MIR_SET0;
irq_setup_generic_chip(gc, IRQ_MSK(num), IRQ_GC_INIT_MASK_CACHE,
IRQ_NOREQUEST | IRQ_NOPROBE, 0);
}
-static void __init omap_init_irq(u32 base, int nr_irqs)
+static void __init omap_init_irq(u32 base, int nr_irqs,
+ struct device_node *node)
{
void __iomem *omap_irq_base;
unsigned long nr_of_irqs = 0;
unsigned int nr_banks = 0;
- int i, j;
+ int i, j, irq_base;
omap_irq_base = ioremap(base, SZ_4K);
if (WARN_ON(!omap_irq_base))
return;
+ irq_base = irq_alloc_descs(-1, 0, nr_irqs, 0);
+ if (irq_base < 0) {
+ pr_warn("Couldn't allocate IRQ numbers\n");
+ irq_base = 0;
+ }
+
+ domain = irq_domain_add_legacy(node, nr_irqs, irq_base, 0,
+ &irq_domain_simple_ops, NULL);
+
for (i = 0; i < ARRAY_SIZE(irq_banks); i++) {
struct omap_irq_bank *bank = irq_banks + i;
@@ -166,41 +187,42 @@ static void __init omap_init_irq(u32 base, int nr_irqs)
/* Static mapping, never released */
bank->base_reg = ioremap(base, SZ_4K);
if (!bank->base_reg) {
- printk(KERN_ERR "Could not ioremap irq bank%i\n", i);
+ pr_err("Could not ioremap irq bank%i\n", i);
continue;
}
omap_irq_bank_init_one(bank);
for (j = 0; j < bank->nr_irqs; j += 32)
- omap_alloc_gc(bank->base_reg + j, j, 32);
+ omap_alloc_gc(bank->base_reg + j, j + irq_base, 32);
nr_of_irqs += bank->nr_irqs;
nr_banks++;
}
- printk(KERN_INFO "Total of %ld interrupts on %d active controller%s\n",
- nr_of_irqs, nr_banks, nr_banks > 1 ? "s" : "");
+ pr_info("Total of %ld interrupts on %d active controller%s\n",
+ nr_of_irqs, nr_banks, nr_banks > 1 ? "s" : "");
}
void __init omap2_init_irq(void)
{
- omap_init_irq(OMAP24XX_IC_BASE, 96);
+ omap_init_irq(OMAP24XX_IC_BASE, 96, NULL);
}
void __init omap3_init_irq(void)
{
- omap_init_irq(OMAP34XX_IC_BASE, 96);
+ omap_init_irq(OMAP34XX_IC_BASE, 96, NULL);
}
void __init ti81xx_init_irq(void)
{
- omap_init_irq(OMAP34XX_IC_BASE, 128);
+ omap_init_irq(OMAP34XX_IC_BASE, 128, NULL);
}
static inline void omap_intc_handle_irq(void __iomem *base_addr, struct pt_regs *regs)
{
u32 irqnr;
+ int handled_irq = 0;
do {
irqnr = readl_relaxed(base_addr + 0x98);
@@ -212,7 +234,7 @@ static inline void omap_intc_handle_irq(void __iomem *base_addr, struct pt_regs
goto out;
irqnr = readl_relaxed(base_addr + 0xd8);
-#ifdef CONFIG_SOC_OMAPTI816X
+#if IS_ENABLED(CONFIG_SOC_TI81XX) || IS_ENABLED(CONFIG_SOC_AM33XX)
if (irqnr)
goto out;
irqnr = readl_relaxed(base_addr + 0xf8);
@@ -225,9 +247,18 @@ out:
irqnr = readl_relaxed(base_addr + INTCPS_SIR_IRQ_OFFSET);
irqnr &= ACTIVEIRQ_MASK;
- if (irqnr)
+ if (irqnr) {
+ irqnr = irq_find_mapping(domain, irqnr);
handle_IRQ(irqnr, regs);
+ handled_irq = 1;
+ }
} while (irqnr);
+
+ /* If an irq is masked or deasserted while active, we will
+ * keep ending up here with no irq handled. So remove it from
+ * the INTC with an ack.*/
+ if (!handled_irq)
+ omap_ack_irq(NULL);
}
asmlinkage void __exception_irq_entry omap2_intc_handle_irq(struct pt_regs *regs)
@@ -236,7 +267,39 @@ asmlinkage void __exception_irq_entry omap2_intc_handle_irq(struct pt_regs *regs
omap_intc_handle_irq(base_addr, regs);
}
-#ifdef CONFIG_ARCH_OMAP3
+int __init intc_of_init(struct device_node *node,
+ struct device_node *parent)
+{
+ struct resource res;
+ u32 nr_irq = 96;
+
+ if (WARN_ON(!node))
+ return -ENODEV;
+
+ if (of_address_to_resource(node, 0, &res)) {
+ WARN(1, "unable to get intc registers\n");
+ return -EINVAL;
+ }
+
+ if (of_property_read_u32(node, "ti,intc-size", &nr_irq))
+ pr_warn("unable to get intc-size, default to %d\n", nr_irq);
+
+ omap_init_irq(res.start, nr_irq, of_node_get(node));
+
+ return 0;
+}
+
+static struct of_device_id irq_match[] __initdata = {
+ { .compatible = "ti,omap2-intc", .data = intc_of_init, },
+ { }
+};
+
+void __init omap_intc_of_init(void)
+{
+ of_irq_init(irq_match);
+}
+
+#if defined(CONFIG_ARCH_OMAP3) || defined(CONFIG_SOC_AM33XX)
static struct omap3_intc_regs intc_context[ARRAY_SIZE(irq_banks)];
void omap_intc_save_context(void)
@@ -291,7 +354,7 @@ void omap_intc_restore_context(void)
void omap3_intc_suspend(void)
{
/* A pending interrupt would prevent OMAP from entering suspend */
- omap_ack_irq(0);
+ omap_ack_irq(NULL);
}
void omap3_intc_prepare_idle(void)
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 15:32:32 +0000