diff options
Diffstat (limited to 'arch/mips/jz4740/irq.c')
| -rw-r--r-- | arch/mips/jz4740/irq.c | 162 |
1 files changed, 0 insertions, 162 deletions
diff --git a/arch/mips/jz4740/irq.c b/arch/mips/jz4740/irq.c deleted file mode 100644 index 97206b3deb97..000000000000 --- a/arch/mips/jz4740/irq.c +++ /dev/null @@ -1,162 +0,0 @@ -/* - * Copyright (C) 2009-2010, Lars-Peter Clausen <lars@metafoo.de> - * JZ4740 platform IRQ support - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 675 Mass Ave, Cambridge, MA 02139, USA. - * - */ - -#include <linux/errno.h> -#include <linux/init.h> -#include <linux/types.h> -#include <linux/interrupt.h> -#include <linux/ioport.h> -#include <linux/timex.h> -#include <linux/slab.h> -#include <linux/delay.h> - -#include <linux/debugfs.h> -#include <linux/seq_file.h> - -#include <asm/io.h> -#include <asm/mipsregs.h> -#include <asm/irq_cpu.h> - -#include <asm/mach-jz4740/base.h> -#include <asm/mach-jz4740/irq.h> - -#include "irq.h" - -static void __iomem *jz_intc_base; - -#define JZ_REG_INTC_STATUS 0x00 -#define JZ_REG_INTC_MASK 0x04 -#define JZ_REG_INTC_SET_MASK 0x08 -#define JZ_REG_INTC_CLEAR_MASK 0x0c -#define JZ_REG_INTC_PENDING 0x10 - -static irqreturn_t jz4740_cascade(int irq, void *data) -{ - uint32_t irq_reg; - - irq_reg = readl(jz_intc_base + JZ_REG_INTC_PENDING); - - if (irq_reg) - generic_handle_irq(__fls(irq_reg) + JZ4740_IRQ_BASE); - - return IRQ_HANDLED; -} - -static void jz4740_irq_set_mask(struct irq_chip_generic *gc, uint32_t mask) -{ - struct irq_chip_regs *regs = &gc->chip_types->regs; - - writel(mask, gc->reg_base + regs->enable); - writel(~mask, gc->reg_base + regs->disable); -} - -void jz4740_irq_suspend(struct irq_data *data) -{ - struct irq_chip_generic *gc = irq_data_get_irq_chip_data(data); - jz4740_irq_set_mask(gc, gc->wake_active); -} - -void jz4740_irq_resume(struct irq_data *data) -{ - struct irq_chip_generic *gc = irq_data_get_irq_chip_data(data); - jz4740_irq_set_mask(gc, gc->mask_cache); -} - -static struct irqaction jz4740_cascade_action = { - .handler = jz4740_cascade, - .name = "JZ4740 cascade interrupt", -}; - -void __init arch_init_irq(void) -{ - struct irq_chip_generic *gc; - struct irq_chip_type *ct; - - mips_cpu_irq_init(); - - jz_intc_base = ioremap(JZ4740_INTC_BASE_ADDR, 0x14); - - /* Mask all irqs */ - writel(0xffffffff, jz_intc_base + JZ_REG_INTC_SET_MASK); - - gc = irq_alloc_generic_chip("INTC", 1, JZ4740_IRQ_BASE, jz_intc_base, - handle_level_irq); - - gc->wake_enabled = IRQ_MSK(32); - - ct = gc->chip_types; - ct->regs.enable = JZ_REG_INTC_CLEAR_MASK; - ct->regs.disable = JZ_REG_INTC_SET_MASK; - ct->chip.irq_unmask = irq_gc_unmask_enable_reg; - ct->chip.irq_mask = irq_gc_mask_disable_reg; - ct->chip.irq_mask_ack = irq_gc_mask_disable_reg; - ct->chip.irq_set_wake = irq_gc_set_wake; - ct->chip.irq_suspend = jz4740_irq_suspend; - ct->chip.irq_resume = jz4740_irq_resume; - - irq_setup_generic_chip(gc, IRQ_MSK(32), 0, 0, IRQ_NOPROBE | IRQ_LEVEL); - - setup_irq(2, &jz4740_cascade_action); -} - -asmlinkage void plat_irq_dispatch(void) -{ - unsigned int pending = read_c0_status() & read_c0_cause() & ST0_IM; - if (pending & STATUSF_IP2) - do_IRQ(2); - else if (pending & STATUSF_IP3) - do_IRQ(3); - else - spurious_interrupt(); -} - -#ifdef CONFIG_DEBUG_FS - -static inline void intc_seq_reg(struct seq_file *s, const char *name, - unsigned int reg) -{ - seq_printf(s, "%s:\t\t%08x\n", name, readl(jz_intc_base + reg)); -} - -static int intc_regs_show(struct seq_file *s, void *unused) -{ - intc_seq_reg(s, "Status", JZ_REG_INTC_STATUS); - intc_seq_reg(s, "Mask", JZ_REG_INTC_MASK); - intc_seq_reg(s, "Pending", JZ_REG_INTC_PENDING); - - return 0; -} - -static int intc_regs_open(struct inode *inode, struct file *file) -{ - return single_open(file, intc_regs_show, NULL); -} - -static const struct file_operations intc_regs_operations = { - .open = intc_regs_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static int __init intc_debugfs_init(void) -{ - (void) debugfs_create_file("jz_regs_intc", S_IFREG | S_IRUGO, - NULL, NULL, &intc_regs_operations); - return 0; -} -subsys_initcall(intc_debugfs_init); - -#endif |