You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
118 lines
2.2 KiB
118 lines
2.2 KiB
/*
|
|
* arch/sh/boards/saturn/irq.c
|
|
*
|
|
* Copyright (C) 2002 Paul Mundt
|
|
*
|
|
* Released under the terms of the GNU GPL v2.0.
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/io.h>
|
|
|
|
/*
|
|
* Interrupts map out as follows:
|
|
*
|
|
* Vector Name Mask
|
|
*
|
|
* 64 VBLANKIN 0x0001
|
|
* 65 VBLANKOUT 0x0002
|
|
* 66 HBLANKIN 0x0004
|
|
* 67 TIMER0 0x0008
|
|
* 68 TIMER1 0x0010
|
|
* 69 DSPEND 0x0020
|
|
* 70 SOUNDREQUEST 0x0040
|
|
* 71 SYSTEMMANAGER 0x0080
|
|
* 72 PAD 0x0100
|
|
* 73 LEVEL2DMAEND 0x0200
|
|
* 74 LEVEL1DMAEND 0x0400
|
|
* 75 LEVEL0DMAEND 0x0800
|
|
* 76 DMAILLEGAL 0x1000
|
|
* 77 SRITEDRAWEND 0x2000
|
|
* 78 ABUS 0x8000
|
|
*
|
|
*/
|
|
#define SATURN_IRQ_MIN 64 /* VBLANKIN */
|
|
#define SATURN_IRQ_MAX 78 /* ABUS */
|
|
|
|
#define SATURN_IRQ_MASK 0xbfff
|
|
|
|
static inline u32 saturn_irq_mask(unsigned int irq_nr)
|
|
{
|
|
u32 mask;
|
|
|
|
mask = (1 << (irq_nr - SATURN_IRQ_MIN));
|
|
mask <<= (irq_nr == SATURN_IRQ_MAX);
|
|
mask &= SATURN_IRQ_MASK;
|
|
|
|
return mask;
|
|
}
|
|
|
|
static inline void mask_saturn_irq(unsigned int irq_nr)
|
|
{
|
|
u32 mask;
|
|
|
|
mask = ctrl_inl(SATURN_IMR);
|
|
mask |= saturn_irq_mask(irq_nr);
|
|
ctrl_outl(mask, SATURN_IMR);
|
|
}
|
|
|
|
static inline void unmask_saturn_irq(unsigned int irq_nr)
|
|
{
|
|
u32 mask;
|
|
|
|
mask = ctrl_inl(SATURN_IMR);
|
|
mask &= ~saturn_irq_mask(irq_nr);
|
|
ctrl_outl(mask, SATURN_IMR);
|
|
}
|
|
|
|
static void disable_saturn_irq(unsigned int irq_nr)
|
|
{
|
|
mask_saturn_irq(irq_nr);
|
|
}
|
|
|
|
static void enable_saturn_irq(unsigned int irq_nr)
|
|
{
|
|
unmask_saturn_irq(irq_nr);
|
|
}
|
|
|
|
static void mask_and_ack_saturn_irq(unsigned int irq_nr)
|
|
{
|
|
mask_saturn_irq(irq_nr);
|
|
}
|
|
|
|
static void end_saturn_irq(unsigned int irq_nr)
|
|
{
|
|
if (!(irq_desc[irq_nr].status & (IRQ_DISABLED | IRQ_INPROGRESS)))
|
|
unmask_saturn_irq(irq_nr);
|
|
}
|
|
|
|
static unsigned int startup_saturn_irq(unsigned int irq_nr)
|
|
{
|
|
unmask_saturn_irq(irq_nr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void shutdown_saturn_irq(unsigned int irq_nr)
|
|
{
|
|
mask_saturn_irq(irq_nr);
|
|
}
|
|
|
|
static struct hw_interrupt_type saturn_int = {
|
|
.typename = "Saturn",
|
|
.enable = enable_saturn_irq,
|
|
.disable = disable_saturn_irq,
|
|
.ack = mask_and_ack_saturn_irq,
|
|
.end = end_saturn_irq,
|
|
.startup = startup_saturn_irq,
|
|
.shutdown = shutdown_saturn_irq,
|
|
};
|
|
|
|
int saturn_irq_demux(int irq_nr)
|
|
{
|
|
/* FIXME */
|
|
return irq_nr;
|
|
}
|
|
|
|
|