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Diffstat (limited to 'arch/mips/lantiq/irq.c')
-rw-r--r--arch/mips/lantiq/irq.c82
1 files changed, 51 insertions, 31 deletions
diff --git a/arch/mips/lantiq/irq.c b/arch/mips/lantiq/irq.c
index 57c1a4e51408..f36acd1b3808 100644
--- a/arch/mips/lantiq/irq.c
+++ b/arch/mips/lantiq/irq.c
@@ -55,8 +55,8 @@
*/
#define LTQ_ICU_EBU_IRQ 22
-#define ltq_icu_w32(x, y) ltq_w32((x), ltq_icu_membase + (y))
-#define ltq_icu_r32(x) ltq_r32(ltq_icu_membase + (x))
+#define ltq_icu_w32(m, x, y) ltq_w32((x), ltq_icu_membase[m] + (y))
+#define ltq_icu_r32(m, x) ltq_r32(ltq_icu_membase[m] + (x))
#define ltq_eiu_w32(x, y) ltq_w32((x), ltq_eiu_membase + (y))
#define ltq_eiu_r32(x) ltq_r32(ltq_eiu_membase + (x))
@@ -82,17 +82,18 @@ static unsigned short ltq_eiu_irq[MAX_EIU] = {
};
static int exin_avail;
-static void __iomem *ltq_icu_membase;
+static void __iomem *ltq_icu_membase[MAX_IM];
static void __iomem *ltq_eiu_membase;
+static struct irq_domain *ltq_domain;
void ltq_disable_irq(struct irq_data *d)
{
u32 ier = LTQ_ICU_IM0_IER;
int offset = d->hwirq - MIPS_CPU_IRQ_CASCADE;
+ int im = offset / INT_NUM_IM_OFFSET;
- ier += LTQ_ICU_OFFSET * (offset / INT_NUM_IM_OFFSET);
offset %= INT_NUM_IM_OFFSET;
- ltq_icu_w32(ltq_icu_r32(ier) & ~BIT(offset), ier);
+ ltq_icu_w32(im, ltq_icu_r32(im, ier) & ~BIT(offset), ier);
}
void ltq_mask_and_ack_irq(struct irq_data *d)
@@ -100,32 +101,31 @@ void ltq_mask_and_ack_irq(struct irq_data *d)
u32 ier = LTQ_ICU_IM0_IER;
u32 isr = LTQ_ICU_IM0_ISR;
int offset = d->hwirq - MIPS_CPU_IRQ_CASCADE;
+ int im = offset / INT_NUM_IM_OFFSET;
- ier += LTQ_ICU_OFFSET * (offset / INT_NUM_IM_OFFSET);
- isr += LTQ_ICU_OFFSET * (offset / INT_NUM_IM_OFFSET);
offset %= INT_NUM_IM_OFFSET;
- ltq_icu_w32(ltq_icu_r32(ier) & ~BIT(offset), ier);
- ltq_icu_w32(BIT(offset), isr);
+ ltq_icu_w32(im, ltq_icu_r32(im, ier) & ~BIT(offset), ier);
+ ltq_icu_w32(im, BIT(offset), isr);
}
static void ltq_ack_irq(struct irq_data *d)
{
u32 isr = LTQ_ICU_IM0_ISR;
int offset = d->hwirq - MIPS_CPU_IRQ_CASCADE;
+ int im = offset / INT_NUM_IM_OFFSET;
- isr += LTQ_ICU_OFFSET * (offset / INT_NUM_IM_OFFSET);
offset %= INT_NUM_IM_OFFSET;
- ltq_icu_w32(BIT(offset), isr);
+ ltq_icu_w32(im, BIT(offset), isr);
}
void ltq_enable_irq(struct irq_data *d)
{
u32 ier = LTQ_ICU_IM0_IER;
int offset = d->hwirq - MIPS_CPU_IRQ_CASCADE;
+ int im = offset / INT_NUM_IM_OFFSET;
- ier += LTQ_ICU_OFFSET * (offset / INT_NUM_IM_OFFSET);
offset %= INT_NUM_IM_OFFSET;
- ltq_icu_w32(ltq_icu_r32(ier) | BIT(offset), ier);
+ ltq_icu_w32(im, ltq_icu_r32(im, ier) | BIT(offset), ier);
}
static unsigned int ltq_startup_eiu_irq(struct irq_data *d)
@@ -192,7 +192,7 @@ static void ltq_hw_irqdispatch(int module)
{
u32 irq;
- irq = ltq_icu_r32(LTQ_ICU_IM0_IOSR + (module * LTQ_ICU_OFFSET));
+ irq = ltq_icu_r32(module, LTQ_ICU_IM0_IOSR);
if (irq == 0)
return;
@@ -220,10 +220,14 @@ DEFINE_HWx_IRQDISPATCH(2)
DEFINE_HWx_IRQDISPATCH(3)
DEFINE_HWx_IRQDISPATCH(4)
+#if MIPS_CPU_TIMER_IRQ == 7
static void ltq_hw5_irqdispatch(void)
{
do_IRQ(MIPS_CPU_TIMER_IRQ);
}
+#else
+DEFINE_HWx_IRQDISPATCH(5)
+#endif
#ifdef CONFIG_MIPS_MT_SMP
void __init arch_init_ipiirq(int irq, struct irqaction *action)
@@ -271,11 +275,11 @@ asmlinkage void plat_irq_dispatch(void)
unsigned int pending = read_c0_status() & read_c0_cause() & ST0_IM;
unsigned int i;
- if (pending & CAUSEF_IP7) {
+ if ((MIPS_CPU_TIMER_IRQ == 7) && (pending & CAUSEF_IP7)) {
do_IRQ(MIPS_CPU_TIMER_IRQ);
goto out;
} else {
- for (i = 0; i < 5; i++) {
+ for (i = 0; i < MAX_IM; i++) {
if (pending & (CAUSEF_IP2 << i)) {
ltq_hw_irqdispatch(i);
goto out;
@@ -293,6 +297,9 @@ static int icu_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw)
struct irq_chip *chip = &ltq_irq_type;
int i;
+ if (hw < MIPS_CPU_IRQ_CASCADE)
+ return 0;
+
for (i = 0; i < exin_avail; i++)
if (hw == ltq_eiu_irq[i])
chip = &ltq_eiu_type;
@@ -318,19 +325,23 @@ int __init icu_of_init(struct device_node *node, struct device_node *parent)
struct resource res;
int i;
- if (of_address_to_resource(node, 0, &res))
- panic("Failed to get icu memory range");
+ for (i = 0; i < MAX_IM; i++) {
+ if (of_address_to_resource(node, i, &res))
+ panic("Failed to get icu memory range");
- if (request_mem_region(res.start, resource_size(&res), res.name) < 0)
- pr_err("Failed to request icu memory");
+ if (request_mem_region(res.start, resource_size(&res),
+ res.name) < 0)
+ pr_err("Failed to request icu memory");
- ltq_icu_membase = ioremap_nocache(res.start, resource_size(&res));
- if (!ltq_icu_membase)
- panic("Failed to remap icu memory");
+ ltq_icu_membase[i] = ioremap_nocache(res.start,
+ resource_size(&res));
+ if (!ltq_icu_membase[i])
+ panic("Failed to remap icu memory");
+ }
/* the external interrupts are optional and xway only */
eiu_node = of_find_compatible_node(NULL, NULL, "lantiq,eiu");
- if (eiu_node && of_address_to_resource(eiu_node, 0, &res)) {
+ if (eiu_node && !of_address_to_resource(eiu_node, 0, &res)) {
/* find out how many external irq sources we have */
const __be32 *count = of_get_property(node,
"lantiq,count", NULL);
@@ -351,17 +362,17 @@ int __init icu_of_init(struct device_node *node, struct device_node *parent)
}
/* turn off all irqs by default */
- for (i = 0; i < 5; i++) {
+ for (i = 0; i < MAX_IM; i++) {
/* make sure all irqs are turned off by default */
- ltq_icu_w32(0, LTQ_ICU_IM0_IER + (i * LTQ_ICU_OFFSET));
+ ltq_icu_w32(i, 0, LTQ_ICU_IM0_IER);
/* clear all possibly pending interrupts */
- ltq_icu_w32(~0, LTQ_ICU_IM0_ISR + (i * LTQ_ICU_OFFSET));
+ ltq_icu_w32(i, ~0, LTQ_ICU_IM0_ISR);
}
mips_cpu_irq_init();
- for (i = 2; i <= 6; i++)
- setup_irq(i, &cascade);
+ for (i = 0; i < MAX_IM; i++)
+ setup_irq(i + 2, &cascade);
if (cpu_has_vint) {
pr_info("Setting up vectored interrupts\n");
@@ -373,7 +384,8 @@ int __init icu_of_init(struct device_node *node, struct device_node *parent)
set_vi_handler(7, ltq_hw5_irqdispatch);
}
- irq_domain_add_linear(node, 6 * INT_NUM_IM_OFFSET,
+ ltq_domain = irq_domain_add_linear(node,
+ (MAX_IM * INT_NUM_IM_OFFSET) + MIPS_CPU_IRQ_CASCADE,
&irq_domain_ops, 0);
#if defined(CONFIG_MIPS_MT_SMP)
@@ -397,12 +409,20 @@ int __init icu_of_init(struct device_node *node, struct device_node *parent)
/* tell oprofile which irq to use */
cp0_perfcount_irq = LTQ_PERF_IRQ;
+
+ /*
+ * if the timer irq is not one of the mips irqs we need to
+ * create a mapping
+ */
+ if (MIPS_CPU_TIMER_IRQ != 7)
+ irq_create_mapping(ltq_domain, MIPS_CPU_TIMER_IRQ);
+
return 0;
}
unsigned int __cpuinit get_c0_compare_int(void)
{
- return CP0_LEGACY_COMPARE_IRQ;
+ return MIPS_CPU_TIMER_IRQ;
}
static struct of_device_id __initdata of_irq_ids[] = {
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 19:45:31 +0100