diff options
Diffstat (limited to 'target/linux/xburst/files-2.6.32/arch/mips/jz4740/irq.c')
| -rw-r--r-- | target/linux/xburst/files-2.6.32/arch/mips/jz4740/irq.c | 166 |
1 files changed, 0 insertions, 166 deletions
diff --git a/target/linux/xburst/files-2.6.32/arch/mips/jz4740/irq.c b/target/linux/xburst/files-2.6.32/arch/mips/jz4740/irq.c deleted file mode 100644 index 5555026d1f..0000000000 --- a/target/linux/xburst/files-2.6.32/arch/mips/jz4740/irq.c +++ /dev/null @@ -1,166 +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> - -static void __iomem *jz_intc_base; -static uint32_t jz_intc_wakeup; -static uint32_t jz_intc_saved; - -#define JZ_REG_BASE_INTC 0x10001000 - -#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 - -#define IRQ_BIT(x) BIT((x) - JZ_IRQ_BASE) - -static void intc_irq_unmask(unsigned int irq) -{ - writel(IRQ_BIT(irq), jz_intc_base + JZ_REG_INTC_CLEAR_MASK); -} - -static void intc_irq_mask(unsigned int irq) -{ - writel(IRQ_BIT(irq), jz_intc_base + JZ_REG_INTC_SET_MASK); -} - -static void intc_irq_ack(unsigned int irq) -{ - writel(IRQ_BIT(irq), jz_intc_base + JZ_REG_INTC_PENDING); -} - -static int intc_irq_set_wake(unsigned int irq, unsigned int on) -{ - if (on) - jz_intc_wakeup |= IRQ_BIT(irq); - else - jz_intc_wakeup &= ~IRQ_BIT(irq); - - return 0; -} - -static struct irq_chip intc_irq_type = { - .name = "INTC", - .mask = intc_irq_mask, - .unmask = intc_irq_unmask, - .ack = intc_irq_ack, - .set_wake = intc_irq_set_wake, -}; - -static irqreturn_t jz4740_cascade(int irq, void *data) -{ - uint32_t irq_reg; - - irq_reg = readl(jz_intc_base + JZ_REG_INTC_PENDING); - generic_handle_irq(ffs(irq_reg) - 1 + JZ_IRQ_BASE); - - return IRQ_HANDLED; -} - -static struct irqaction jz4740_cascade_action = { - .handler = jz4740_cascade, - .name = "JZ4740 cascade interrupt", - .flags = IRQF_DISABLED, -}; - -void __init arch_init_irq(void) -{ - int i; - mips_cpu_irq_init(); - - jz_intc_base = ioremap(JZ_REG_BASE_INTC, 0x14); - - for (i = JZ_IRQ_BASE; i < JZ_IRQ_BASE + 32; i++) { - intc_irq_mask(i); - set_irq_chip_and_handler(i, &intc_irq_type, handle_level_irq); - } - - 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(); -} - -/* TODO: Use sysdev */ -void jz4740_intc_suspend(void) -{ - jz_intc_saved = readl(jz_intc_base + JZ_REG_INTC_MASK); - writel(~jz_intc_wakeup, jz_intc_base + JZ_REG_INTC_SET_MASK); - writel(jz_intc_wakeup, jz_intc_base + JZ_REG_INTC_CLEAR_MASK); -} - -void jz4740_intc_resume(void) -{ - writel(~jz_intc_saved, jz_intc_base + JZ_REG_INTC_CLEAR_MASK); - writel(jz_intc_saved, jz_intc_base + JZ_REG_INTC_SET_MASK); -} - -#ifdef CONFIG_DEBUG_FS - -static int intc_regs_show(struct seq_file *s, void *unused) -{ - seq_printf(s, "Status:\t\t%08x\n", readl(jz_intc_base + JZ_REG_INTC_STATUS)); - seq_printf(s, "Mask\t\t%08x\n", readl(jz_intc_base + JZ_REG_INTC_MASK)); - seq_printf(s, "Pending:\t%08x\n", readl(jz_intc_base + 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 |