From 61fa969f27ec58296544bf94d058f3aa704cb8d9 Mon Sep 17 00:00:00 2001 From: John Crispin 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 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