93 lines
2.1 KiB
C
93 lines
2.1 KiB
C
|
/* 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>
|
||
|
|
|
||
|
|
|
||
|
|
/* 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
|
||
|
|
irqchip lh7a400_cpld_chip = {
|
||
|
|
.ack = lh7a400_ack_cpld_irq,
|
||
|
|
.mask = lh7a400_mask_cpld_irq,
|
||
|
|
.unmask = lh7a400_unmask_cpld_irq,
|
||
|
|
};
|
||
|
|
|
||
|
|
static void
|
||
|
|
lh7a400_cpld_handler (unsigned int irq, struct irqdesc *desc,
|
||
|
|
struct pt_regs *regs)
|
||
|
|
{
|
||
|
|
u32 mask = CPLD_LATCHED_INTS;
|
||
|
|
irq = IRQ_KEV_7A400_CPLD;
|
||
|
|
for (; mask; mask >>= 1, ++irq) {
|
||
|
|
if (mask & 1)
|
||
|
|
desc[irq].handle (irq, desc, regs);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/* 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, do_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();
|
||
|
|
}
|