/* arch/arm/mach-lh7a40x/irq-kev7a400.c * * Copyright (C) 2004 Coastal Environmental Systems * * 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. * */ #include <linux/interrupt.h> #include <linux/init.h> #include <asm/irq.h> #include <asm/mach/irq.h> #include <asm/mach/hardware.h> #include <asm/mach/irqs.h> #include "common.h" /* KEV7a400 CPLD IRQ handling */ static u16 CPLD_IRQ_mask; /* Mask for CPLD IRQs, 1 == unmasked */ static void lh7a400_ack_cpld_irq (u32 irq) { CPLD_CL_INT = 1 << (irq - IRQ_KEV7A400_CPLD); } static void lh7a400_mask_cpld_irq (u32 irq) { CPLD_IRQ_mask &= ~(1 << (irq - IRQ_KEV7A400_CPLD)); CPLD_WR_PB_INT_MASK = CPLD_IRQ_mask; } static void lh7a400_unmask_cpld_irq (u32 irq) { CPLD_IRQ_mask |= 1 << (irq - IRQ_KEV7A400_CPLD); CPLD_WR_PB_INT_MASK = CPLD_IRQ_mask; } static struct irq_chip lh7a400_cpld_chip = { .name = "CPLD", .ack = lh7a400_ack_cpld_irq, .mask = lh7a400_mask_cpld_irq, .unmask = lh7a400_unmask_cpld_irq, }; static void lh7a400_cpld_handler (unsigned int irq, struct irq_desc *desc) { u32 mask = CPLD_LATCHED_INTS; irq = IRQ_KEV_7A400_CPLD; for (; mask; mask >>= 1, ++irq) { if (mask & 1) desc[irq].handle (irq, desc); } } /* IRQ initialization */ void __init lh7a400_init_board_irq (void) { int irq; for (irq = IRQ_KEV7A400_CPLD; irq < IRQ_KEV7A400_CPLD + NR_IRQ_KEV7A400_CPLD; ++irq) { set_irq_chip (irq, &lh7a400_cpld_chip); set_irq_handler (irq, handle_edge_irq); set_irq_flags (irq, IRQF_VALID); } set_irq_chained_handler (IRQ_CPLD, kev7a400_cpld_handler); /* Clear all CPLD interrupts */ CPLD_CL_INT = 0xff; /* CPLD_INTR_MMC_CD | CPLD_INTR_ETH_INT; */ /* *** FIXME CF enabled in ide-probe.c */ GPIO_GPIOINTEN = 0; /* Disable all GPIO interrupts */ barrier(); GPIO_INTTYPE1 = (GPIO_INTR_PCC1_CD | GPIO_INTR_PCC1_CD); /* Edge trig. */ GPIO_INTTYPE2 = 0; /* Falling edge & low-level */ GPIO_GPIOFEOI = 0xff; /* Clear all GPIO interrupts */ GPIO_GPIOINTEN = 0xff; /* Enable all GPIO interrupts */ init_FIQ(); }