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openwrt-owl/target/linux/lantiq/patches-3.6/0002-MIPS-lantiq-split-up-I...

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From 61fa969f27ec58296544bf94d058f3aa704cb8d9 Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Thu, 16 Aug 2012 11:39:57 +0000
Subject: [PATCH 2/9] MIPS: lantiq: split up IRQ IM ranges
Up to now all our SoCs had the 5 IM ranges in a consecutive order. To accomodate
the SVIP we need to support IM ranges that are scattered inside the register range.
Signed-off-by: John Crispin <blogic@openwrt.org>
Patchwork: http://patchwork.linux-mips.org/patch/4237/
---
.../include/asm/mach-lantiq/falcon/falcon_irq.h | 2 +
.../mips/include/asm/mach-lantiq/xway/lantiq_irq.h | 2 +
arch/mips/lantiq/irq.c | 60 +++++++++++---------
3 files changed, 36 insertions(+), 28 deletions(-)
diff --git a/arch/mips/include/asm/mach-lantiq/falcon/falcon_irq.h b/arch/mips/include/asm/mach-lantiq/falcon/falcon_irq.h
index 318f982..c6b63a4 100644
--- a/arch/mips/include/asm/mach-lantiq/falcon/falcon_irq.h
+++ b/arch/mips/include/asm/mach-lantiq/falcon/falcon_irq.h
@@ -20,4 +20,6 @@
#define MIPS_CPU_TIMER_IRQ 7
+#define MAX_IM 5
+
#endif /* _FALCON_IRQ__ */
diff --git a/arch/mips/include/asm/mach-lantiq/xway/lantiq_irq.h b/arch/mips/include/asm/mach-lantiq/xway/lantiq_irq.h
index aa0b3b8..5eadfe5 100644
--- a/arch/mips/include/asm/mach-lantiq/xway/lantiq_irq.h
+++ b/arch/mips/include/asm/mach-lantiq/xway/lantiq_irq.h
@@ -21,4 +21,6 @@
#define MIPS_CPU_TIMER_IRQ 7
+#define MAX_IM 5
+
#endif
diff --git a/arch/mips/lantiq/irq.c b/arch/mips/lantiq/irq.c
index 57c1a4e..a2699a70 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 +82,17 @@ 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;
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 +100,31 @@ 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 +191,7 @@ 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;
@@ -275,7 +274,7 @@ asmlinkage void plat_irq_dispatch(void)
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;
@@ -318,15 +317,19 @@ 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");
@@ -351,17 +354,17 @@ 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 +376,8 @@ 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,
+ 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)
--
1.7.10.4
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