+++ /dev/null
-/*
- * 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.
- *
- * Copyright (C) 2010 John Crispin <blogic@openwrt.org>
- */
-
-#include <linux/module.h>
-#include <linux/interrupt.h>
-
-#include <asm/bootinfo.h>
-#include <asm/irq_cpu.h>
-
-#include <lantiq.h>
-#include <irq.h>
-
-#define LQ_ICU_BASE_ADDR (KSEG1 | 0x1F880200)
-
-#define LQ_ICU_IM0_ISR ((u32 *)(LQ_ICU_BASE_ADDR + 0x0000))
-#define LQ_ICU_IM0_IER ((u32 *)(LQ_ICU_BASE_ADDR + 0x0008))
-#define LQ_ICU_IM0_IOSR ((u32 *)(LQ_ICU_BASE_ADDR + 0x0010))
-#define LQ_ICU_IM0_IRSR ((u32 *)(LQ_ICU_BASE_ADDR + 0x0018))
-#define LQ_ICU_IM0_IMR ((u32 *)(LQ_ICU_BASE_ADDR + 0x0020))
-
-#define LQ_ICU_IM1_ISR ((u32 *)(LQ_ICU_BASE_ADDR + 0x0028))
-#define LQ_ICU_IM2_ISR ((u32 *)(LQ_ICU_BASE_ADDR + 0x0050))
-#define LQ_ICU_IM3_ISR ((u32 *)(LQ_ICU_BASE_ADDR + 0x0078))
-#define LQ_ICU_IM4_ISR ((u32 *)(LQ_ICU_BASE_ADDR + 0x00A0))
-
-#define LQ_ICU_OFFSET (LQ_ICU_IM1_ISR - LQ_ICU_IM0_ISR)
-
-void
-lq_disable_irq(unsigned int irq_nr)
-{
- u32 *ier = LQ_ICU_IM0_IER;
- irq_nr -= INT_NUM_IRQ0;
- ier += LQ_ICU_OFFSET * (irq_nr / INT_NUM_IM_OFFSET);
- irq_nr %= INT_NUM_IM_OFFSET;
- lq_w32(lq_r32(ier) & ~(1 << irq_nr), ier);
-}
-EXPORT_SYMBOL(lq_disable_irq);
-
-void
-lq_mask_and_ack_irq(unsigned int irq_nr)
-{
- u32 *ier = LQ_ICU_IM0_IER;
- u32 *isr = LQ_ICU_IM0_ISR;
- irq_nr -= INT_NUM_IRQ0;
- ier += LQ_ICU_OFFSET * (irq_nr / INT_NUM_IM_OFFSET);
- isr += LQ_ICU_OFFSET * (irq_nr / INT_NUM_IM_OFFSET);
- irq_nr %= INT_NUM_IM_OFFSET;
- lq_w32(lq_r32(ier) & ~(1 << irq_nr), ier);
- lq_w32((1 << irq_nr), isr);
-}
-EXPORT_SYMBOL(lq_mask_and_ack_irq);
-
-static void
-lq_ack_irq(unsigned int irq_nr)
-{
- u32 *isr = LQ_ICU_IM0_ISR;
- irq_nr -= INT_NUM_IRQ0;
- isr += LQ_ICU_OFFSET * (irq_nr / INT_NUM_IM_OFFSET);
- irq_nr %= INT_NUM_IM_OFFSET;
- lq_w32((1 << irq_nr), isr);
-}
-
-void
-lq_enable_irq(unsigned int irq_nr)
-{
- u32 *ier = LQ_ICU_IM0_IER;
- irq_nr -= INT_NUM_IRQ0;
- ier += LQ_ICU_OFFSET * (irq_nr / INT_NUM_IM_OFFSET);
- irq_nr %= INT_NUM_IM_OFFSET;
- lq_w32(lq_r32(ier) | (1 << irq_nr), ier);
-}
-EXPORT_SYMBOL(lq_enable_irq);
-
-static unsigned int
-lq_startup_irq(unsigned int irq)
-{
- lq_enable_irq(irq);
- return 0;
-}
-
-static void
-lq_end_irq(unsigned int irq)
-{
- if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
- lq_enable_irq(irq);
-}
-
-static struct irq_chip
-lq_irq_type = {
- "lq_irq",
- .startup = lq_startup_irq,
- .enable = lq_enable_irq,
- .disable = lq_disable_irq,
- .unmask = lq_enable_irq,
- .ack = lq_ack_irq,
- .mask = lq_disable_irq,
- .mask_ack = lq_mask_and_ack_irq,
- .end = lq_end_irq,
-};
-
-static void
-lq_hw_irqdispatch(int module)
-{
- u32 irq;
-
- irq = lq_r32(LQ_ICU_IM0_IOSR + (module * LQ_ICU_OFFSET));
- if (irq == 0)
- return;
-
- /* silicon bug causes only the msb set to 1 to be valid. all
- other bits might be bogus */
- irq = __fls(irq);
- do_IRQ((int)irq + INT_NUM_IM0_IRL0 + (INT_NUM_IM_OFFSET * module));
-}
-
-#define DEFINE_HWx_IRQDISPATCH(x) \
-static void lq_hw ## x ## _irqdispatch(void)\
-{\
- lq_hw_irqdispatch(x); \
-}
-static void lq_hw5_irqdispatch(void)
-{
- do_IRQ(MIPS_CPU_TIMER_IRQ);
-}
-DEFINE_HWx_IRQDISPATCH(0)
-DEFINE_HWx_IRQDISPATCH(1)
-DEFINE_HWx_IRQDISPATCH(2)
-DEFINE_HWx_IRQDISPATCH(3)
-DEFINE_HWx_IRQDISPATCH(4)
-/*DEFINE_HWx_IRQDISPATCH(5)*/
-
-asmlinkage void
-plat_irq_dispatch(void)
-{
- unsigned int pending = read_c0_status() & read_c0_cause() & ST0_IM;
- unsigned int i;
-
- if (pending & CAUSEF_IP7)
- {
- do_IRQ(MIPS_CPU_TIMER_IRQ);
- goto out;
- } else {
- for (i = 0; i < 5; i++)
- {
- if (pending & (CAUSEF_IP2 << i))
- {
- lq_hw_irqdispatch(i);
- goto out;
- }
- }
- }
- printk(KERN_ALERT "Spurious IRQ: CAUSE=0x%08x\n", read_c0_status());
-
-out:
- return;
-}
-
-static struct irqaction
-cascade = {
- .handler = no_action,
- .flags = IRQF_DISABLED,
- .name = "cascade",
-};
-
-void __init
-arch_init_irq(void)
-{
- int i;
-
- for (i = 0; i < 5; i++)
- lq_w32(0, LQ_ICU_IM0_IER + (i * LQ_ICU_OFFSET));
-
- mips_cpu_irq_init();
-
- for (i = 2; i <= 6; i++)
- setup_irq(i, &cascade);
-
- if (cpu_has_vint) {
- printk(KERN_INFO "Setting up vectored interrupts\n");
- set_vi_handler(2, lq_hw0_irqdispatch);
- set_vi_handler(3, lq_hw1_irqdispatch);
- set_vi_handler(4, lq_hw2_irqdispatch);
- set_vi_handler(5, lq_hw3_irqdispatch);
- set_vi_handler(6, lq_hw4_irqdispatch);
- set_vi_handler(7, lq_hw5_irqdispatch);
- }
-
- for (i = INT_NUM_IRQ0; i <= (INT_NUM_IRQ0 + (5 * INT_NUM_IM_OFFSET)); i++)
- set_irq_chip_and_handler(i, &lq_irq_type,
- handle_level_irq);
-
- #if !defined(CONFIG_MIPS_MT_SMP) && !defined(CONFIG_MIPS_MT_SMTC)
- set_c0_status(IE_IRQ0 | IE_IRQ1 | IE_IRQ2 |
- IE_IRQ3 | IE_IRQ4 | IE_IRQ5);
- #else
- set_c0_status(IE_SW0 | IE_SW1 | IE_IRQ0 | IE_IRQ1 |
- IE_IRQ2 | IE_IRQ3 | IE_IRQ4 | IE_IRQ5);
- #endif
-}
-
-void __cpuinit
-arch_fixup_c0_irqs(void)
-{
- /* FIXME: check for CPUID and only do fix for specific chips/versions */
- cp0_compare_irq = CP0_LEGACY_COMPARE_IRQ;
- cp0_perfcount_irq = CP0_LEGACY_PERFCNT_IRQ;
-}
-
projects / openwrt.git / blobdiff