diff options
Diffstat (limited to 'arch/mips/loongson1/common/irq.c')
| -rw-r--r-- | arch/mips/loongson1/common/irq.c | 147 |
1 files changed, 0 insertions, 147 deletions
diff --git a/arch/mips/loongson1/common/irq.c b/arch/mips/loongson1/common/irq.c deleted file mode 100644 index 455a7704a..000000000 --- a/arch/mips/loongson1/common/irq.c +++ /dev/null @@ -1,147 +0,0 @@ -/* - * Copyright (c) 2011 Zhang, Keguang <keguang.zhang@gmail.com> - * - * 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. - */ - -#include <linux/interrupt.h> -#include <linux/irq.h> -#include <asm/irq_cpu.h> - -#include <loongson1.h> -#include <irq.h> - -#define LS1X_INTC_REG(n, x) \ - ((void __iomem *)KSEG1ADDR(LS1X_INTC_BASE + (n * 0x18) + (x))) - -#define LS1X_INTC_INTISR(n) LS1X_INTC_REG(n, 0x0) -#define LS1X_INTC_INTIEN(n) LS1X_INTC_REG(n, 0x4) -#define LS1X_INTC_INTSET(n) LS1X_INTC_REG(n, 0x8) -#define LS1X_INTC_INTCLR(n) LS1X_INTC_REG(n, 0xc) -#define LS1X_INTC_INTPOL(n) LS1X_INTC_REG(n, 0x10) -#define LS1X_INTC_INTEDGE(n) LS1X_INTC_REG(n, 0x14) - -static void ls1x_irq_ack(struct irq_data *d) -{ - unsigned int bit = (d->irq - LS1X_IRQ_BASE) & 0x1f; - unsigned int n = (d->irq - LS1X_IRQ_BASE) >> 5; - - __raw_writel(__raw_readl(LS1X_INTC_INTCLR(n)) - | (1 << bit), LS1X_INTC_INTCLR(n)); -} - -static void ls1x_irq_mask(struct irq_data *d) -{ - unsigned int bit = (d->irq - LS1X_IRQ_BASE) & 0x1f; - unsigned int n = (d->irq - LS1X_IRQ_BASE) >> 5; - - __raw_writel(__raw_readl(LS1X_INTC_INTIEN(n)) - & ~(1 << bit), LS1X_INTC_INTIEN(n)); -} - -static void ls1x_irq_mask_ack(struct irq_data *d) -{ - unsigned int bit = (d->irq - LS1X_IRQ_BASE) & 0x1f; - unsigned int n = (d->irq - LS1X_IRQ_BASE) >> 5; - - __raw_writel(__raw_readl(LS1X_INTC_INTIEN(n)) - & ~(1 << bit), LS1X_INTC_INTIEN(n)); - __raw_writel(__raw_readl(LS1X_INTC_INTCLR(n)) - | (1 << bit), LS1X_INTC_INTCLR(n)); -} - -static void ls1x_irq_unmask(struct irq_data *d) -{ - unsigned int bit = (d->irq - LS1X_IRQ_BASE) & 0x1f; - unsigned int n = (d->irq - LS1X_IRQ_BASE) >> 5; - - __raw_writel(__raw_readl(LS1X_INTC_INTIEN(n)) - | (1 << bit), LS1X_INTC_INTIEN(n)); -} - -static struct irq_chip ls1x_irq_chip = { - .name = "LS1X-INTC", - .irq_ack = ls1x_irq_ack, - .irq_mask = ls1x_irq_mask, - .irq_mask_ack = ls1x_irq_mask_ack, - .irq_unmask = ls1x_irq_unmask, -}; - -static void ls1x_irq_dispatch(int n) -{ - u32 int_status, irq; - - /* Get pending sources, masked by current enables */ - int_status = __raw_readl(LS1X_INTC_INTISR(n)) & - __raw_readl(LS1X_INTC_INTIEN(n)); - - if (int_status) { - irq = LS1X_IRQ(n, __ffs(int_status)); - do_IRQ(irq); - } -} - -asmlinkage void plat_irq_dispatch(void) -{ - unsigned int pending; - - pending = read_c0_cause() & read_c0_status() & ST0_IM; - - if (pending & CAUSEF_IP7) - do_IRQ(TIMER_IRQ); - else if (pending & CAUSEF_IP2) - ls1x_irq_dispatch(0); /* INT0 */ - else if (pending & CAUSEF_IP3) - ls1x_irq_dispatch(1); /* INT1 */ - else if (pending & CAUSEF_IP4) - ls1x_irq_dispatch(2); /* INT2 */ - else if (pending & CAUSEF_IP5) - ls1x_irq_dispatch(3); /* INT3 */ - else if (pending & CAUSEF_IP6) - ls1x_irq_dispatch(4); /* INT4 */ - else - spurious_interrupt(); - -} - -struct irqaction cascade_irqaction = { - .handler = no_action, - .name = "cascade", - .flags = IRQF_NO_THREAD, -}; - -static void __init ls1x_irq_init(int base) -{ - int n; - - /* Disable interrupts and clear pending, - * setup all IRQs as high level triggered - */ - for (n = 0; n < 4; n++) { - __raw_writel(0x0, LS1X_INTC_INTIEN(n)); - __raw_writel(0xffffffff, LS1X_INTC_INTCLR(n)); - __raw_writel(0xffffffff, LS1X_INTC_INTPOL(n)); - /* set DMA0, DMA1 and DMA2 to edge trigger */ - __raw_writel(n ? 0x0 : 0xe000, LS1X_INTC_INTEDGE(n)); - } - - - for (n = base; n < LS1X_IRQS; n++) { - irq_set_chip_and_handler(n, &ls1x_irq_chip, - handle_level_irq); - } - - setup_irq(INT0_IRQ, &cascade_irqaction); - setup_irq(INT1_IRQ, &cascade_irqaction); - setup_irq(INT2_IRQ, &cascade_irqaction); - setup_irq(INT3_IRQ, &cascade_irqaction); -} - -void __init arch_init_irq(void) -{ - mips_cpu_irq_init(); - ls1x_irq_init(LS1X_IRQ_BASE); -} |