163 lines
3.2 KiB
C
163 lines
3.2 KiB
C
#include <linux/init.h>
|
|
#include <linux/list.h>
|
|
#include <linux/io.h>
|
|
|
|
#include <asm/mach/irq.h>
|
|
#include <asm/hardware/iomd.h>
|
|
#include <asm/irq.h>
|
|
|
|
static void iomd_ack_irq_a(unsigned int irq)
|
|
{
|
|
unsigned int val, mask;
|
|
|
|
mask = 1 << irq;
|
|
val = iomd_readb(IOMD_IRQMASKA);
|
|
iomd_writeb(val & ~mask, IOMD_IRQMASKA);
|
|
iomd_writeb(mask, IOMD_IRQCLRA);
|
|
}
|
|
|
|
static void iomd_mask_irq_a(unsigned int irq)
|
|
{
|
|
unsigned int val, mask;
|
|
|
|
mask = 1 << irq;
|
|
val = iomd_readb(IOMD_IRQMASKA);
|
|
iomd_writeb(val & ~mask, IOMD_IRQMASKA);
|
|
}
|
|
|
|
static void iomd_unmask_irq_a(unsigned int irq)
|
|
{
|
|
unsigned int val, mask;
|
|
|
|
mask = 1 << irq;
|
|
val = iomd_readb(IOMD_IRQMASKA);
|
|
iomd_writeb(val | mask, IOMD_IRQMASKA);
|
|
}
|
|
|
|
static struct irq_chip iomd_a_chip = {
|
|
.ack = iomd_ack_irq_a,
|
|
.mask = iomd_mask_irq_a,
|
|
.unmask = iomd_unmask_irq_a,
|
|
};
|
|
|
|
static void iomd_mask_irq_b(unsigned int irq)
|
|
{
|
|
unsigned int val, mask;
|
|
|
|
mask = 1 << (irq & 7);
|
|
val = iomd_readb(IOMD_IRQMASKB);
|
|
iomd_writeb(val & ~mask, IOMD_IRQMASKB);
|
|
}
|
|
|
|
static void iomd_unmask_irq_b(unsigned int irq)
|
|
{
|
|
unsigned int val, mask;
|
|
|
|
mask = 1 << (irq & 7);
|
|
val = iomd_readb(IOMD_IRQMASKB);
|
|
iomd_writeb(val | mask, IOMD_IRQMASKB);
|
|
}
|
|
|
|
static struct irq_chip iomd_b_chip = {
|
|
.ack = iomd_mask_irq_b,
|
|
.mask = iomd_mask_irq_b,
|
|
.unmask = iomd_unmask_irq_b,
|
|
};
|
|
|
|
static void iomd_mask_irq_dma(unsigned int irq)
|
|
{
|
|
unsigned int val, mask;
|
|
|
|
mask = 1 << (irq & 7);
|
|
val = iomd_readb(IOMD_DMAMASK);
|
|
iomd_writeb(val & ~mask, IOMD_DMAMASK);
|
|
}
|
|
|
|
static void iomd_unmask_irq_dma(unsigned int irq)
|
|
{
|
|
unsigned int val, mask;
|
|
|
|
mask = 1 << (irq & 7);
|
|
val = iomd_readb(IOMD_DMAMASK);
|
|
iomd_writeb(val | mask, IOMD_DMAMASK);
|
|
}
|
|
|
|
static struct irq_chip iomd_dma_chip = {
|
|
.ack = iomd_mask_irq_dma,
|
|
.mask = iomd_mask_irq_dma,
|
|
.unmask = iomd_unmask_irq_dma,
|
|
};
|
|
|
|
static void iomd_mask_irq_fiq(unsigned int irq)
|
|
{
|
|
unsigned int val, mask;
|
|
|
|
mask = 1 << (irq & 7);
|
|
val = iomd_readb(IOMD_FIQMASK);
|
|
iomd_writeb(val & ~mask, IOMD_FIQMASK);
|
|
}
|
|
|
|
static void iomd_unmask_irq_fiq(unsigned int irq)
|
|
{
|
|
unsigned int val, mask;
|
|
|
|
mask = 1 << (irq & 7);
|
|
val = iomd_readb(IOMD_FIQMASK);
|
|
iomd_writeb(val | mask, IOMD_FIQMASK);
|
|
}
|
|
|
|
static struct irq_chip iomd_fiq_chip = {
|
|
.ack = iomd_mask_irq_fiq,
|
|
.mask = iomd_mask_irq_fiq,
|
|
.unmask = iomd_unmask_irq_fiq,
|
|
};
|
|
|
|
void __init rpc_init_irq(void)
|
|
{
|
|
unsigned int irq, flags;
|
|
|
|
iomd_writeb(0, IOMD_IRQMASKA);
|
|
iomd_writeb(0, IOMD_IRQMASKB);
|
|
iomd_writeb(0, IOMD_FIQMASK);
|
|
iomd_writeb(0, IOMD_DMAMASK);
|
|
|
|
for (irq = 0; irq < NR_IRQS; irq++) {
|
|
flags = IRQF_VALID;
|
|
|
|
if (irq <= 6 || (irq >= 9 && irq <= 15))
|
|
flags |= IRQF_PROBE;
|
|
|
|
if (irq == 21 || (irq >= 16 && irq <= 19) ||
|
|
irq == IRQ_KEYBOARDTX)
|
|
flags |= IRQF_NOAUTOEN;
|
|
|
|
switch (irq) {
|
|
case 0 ... 7:
|
|
set_irq_chip(irq, &iomd_a_chip);
|
|
set_irq_handler(irq, handle_level_irq);
|
|
set_irq_flags(irq, flags);
|
|
break;
|
|
|
|
case 8 ... 15:
|
|
set_irq_chip(irq, &iomd_b_chip);
|
|
set_irq_handler(irq, handle_level_irq);
|
|
set_irq_flags(irq, flags);
|
|
break;
|
|
|
|
case 16 ... 21:
|
|
set_irq_chip(irq, &iomd_dma_chip);
|
|
set_irq_handler(irq, handle_level_irq);
|
|
set_irq_flags(irq, flags);
|
|
break;
|
|
|
|
case 64 ... 71:
|
|
set_irq_chip(irq, &iomd_fiq_chip);
|
|
set_irq_flags(irq, IRQF_VALID);
|
|
break;
|
|
}
|
|
}
|
|
|
|
init_FIQ();
|
|
}
|
|
|