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/* $Id: irq_onchip.c,v 1.7 2000-01-09 15:55:55+09 gniibe Exp $
*
* linux/arch/sh/kernel/irq_onchip.c
*
* Copyright (C) 1999 Niibe Yutaka & Takeshi Yaegashi
*
* Interrupt handling for on-chip supporting modules (TMU, RTC, etc.).
*
*/
#include <linux/config.h>
#include <linux/ptrace.h>
#include <linux/errno.h>
#include <linux/kernel_stat.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/ioport.h>
#include <linux/interrupt.h>
#include <linux/timex.h>
#include <linux/malloc.h>
#include <linux/random.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/init.h>
#include <asm/system.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/bitops.h>
#include <asm/smp.h>
#include <asm/pgtable.h>
#include <asm/delay.h>
#include <linux/irq.h>
struct ipr_data {
int offset;
int priority;
};
static struct ipr_data ipr_data[NR_IRQS-TIMER_IRQ];
void set_ipr_data(unsigned int irq, int offset, int priority)
{
ipr_data[irq-TIMER_IRQ].offset = offset;
ipr_data[irq-TIMER_IRQ].priority = priority;
}
static void enable_onChip_irq(unsigned int irq);
void disable_onChip_irq(unsigned int irq);
/* shutdown is same as "disable" */
#define shutdown_onChip_irq disable_onChip_irq
static void mask_and_ack_onChip(unsigned int);
static void end_onChip_irq(unsigned int irq);
static unsigned int startup_onChip_irq(unsigned int irq)
{
enable_onChip_irq(irq);
return 0; /* never anything pending */
}
static struct hw_interrupt_type onChip_irq_type = {
"On-Chip-IPR",
startup_onChip_irq,
shutdown_onChip_irq,
enable_onChip_irq,
disable_onChip_irq,
mask_and_ack_onChip,
end_onChip_irq
};
/*
* These have to be protected by the irq controller spinlock
* before being called.
*
*
* IPRA 15-12 11-8 7-4 3-0
* IPRB 15-12 11-8 7-4 3-0
* IPRC 15-12 11-8 7-4 3-0
*
*/
#if defined(__sh3__)
#define INTC_IPR 0xfffffee2UL /* Word access */
#define INTC_SIZE 0x2
#elif defined(__SH4__)
#define INTC_IPR 0xffd00004UL /* Word access */
#define INTC_SIZE 0x4
#endif
void disable_onChip_irq(unsigned int irq)
{
unsigned long val, flags;
/* Set priority in IPR to 0 */
int offset = ipr_data[irq-TIMER_IRQ].offset;
unsigned long intc_ipr_address = INTC_IPR + (offset/16*INTC_SIZE);
unsigned short mask = 0xffff ^ (0xf << (offset%16));
save_and_cli(flags);
val = ctrl_inw(intc_ipr_address);
val &= mask;
ctrl_outw(val, intc_ipr_address);
restore_flags(flags);
}
static void enable_onChip_irq(unsigned int irq)
{
unsigned long val, flags;
/* Set priority in IPR back to original value */
int offset = ipr_data[irq-TIMER_IRQ].offset;
int priority = ipr_data[irq-TIMER_IRQ].priority;
unsigned long intc_ipr_address = INTC_IPR + (offset/16*INTC_SIZE);
unsigned short value = (priority << (offset%16));
save_and_cli(flags);
val = ctrl_inw(intc_ipr_address);
val |= value;
ctrl_outw(val, intc_ipr_address);
restore_flags(flags);
}
void make_onChip_irq(unsigned int irq)
{
disable_irq_nosync(irq);
irq_desc[irq].handler = &onChip_irq_type;
enable_irq(irq);
}
static void mask_and_ack_onChip(unsigned int irq)
{
disable_onChip_irq(irq);
}
static void end_onChip_irq(unsigned int irq)
{
enable_onChip_irq(irq);
}
#ifdef CONFIG_CPU_SUBTYPE_SH7709
/*
* SH7707/SH7709/SH7709A/SH7729 Extended on-chip I/O
*/
#define INTC_IRR0 0xa4000004UL
#define INTC_IRR1 0xa4000006UL
#define INTC_IRR2 0xa4000008UL
#define INTC_ICR0 0xfffffee0
#define INTC_ICR1 0xa4000010
#define INTC_ICR2 0xa4000012
#define INTC_INTER 0xa4000014
#define INTC_IPRA 0xfffffee2
#define INTC_IPRB 0xfffffee4
#define INTC_IPRC 0xa4000016
#define INTC_IPRD 0xa4000018
#define INTC_IPRE 0xa400001a
#define IRQ0_IRQ 32
#define IRQ1_IRQ 33
#define IRQ2_IRQ 34
#define IRQ3_IRQ 35
#define IRQ4_IRQ 36
#define IRQ5_IRQ 37
#define IRQ0_IRP_OFFSET 32
#define IRQ1_IRP_OFFSET 36
#define IRQ2_IRP_OFFSET 40
#define IRQ3_IRP_OFFSET 44
#define IRQ4_IRP_OFFSET 48
#define IRQ5_IRP_OFFSET 52
#define IRQ0_PRIORITY 1
#define IRQ1_PRIORITY 1
#define IRQ2_PRIORITY 1
#define IRQ3_PRIORITY 1
#define IRQ4_PRIORITY 1
#define IRQ5_PRIORITY 1
static void enable_onChip2_irq(unsigned int irq);
void disable_onChip2_irq(unsigned int irq);
/* shutdown is same as "disable" */
#define shutdown_onChip2_irq disable_onChip2_irq
static void mask_and_ack_onChip2(unsigned int);
static void end_onChip2_irq(unsigned int irq);
static unsigned int startup_onChip2_irq(unsigned int irq)
{
enable_onChip2_irq(irq);
return 0; /* never anything pending */
}
static struct hw_interrupt_type onChip2_irq_type = {
"Extended-IPR",
startup_onChip2_irq,
shutdown_onChip2_irq,
enable_onChip2_irq,
disable_onChip2_irq,
mask_and_ack_onChip2,
end_onChip2_irq
};
void disable_onChip2_irq(unsigned int irq)
{
unsigned long val, flags;
/* Set priority in IPR to 0 */
int offset = ipr_data[irq-TIMER_IRQ].offset - 32;
unsigned long intc_ipr_address = INTC_IPRC + (offset/16*INTC_SIZE);
unsigned short mask = 0xffff ^ (0xf << (offset%16));
save_and_cli(flags);
val = ctrl_inw(intc_ipr_address);
val &= mask;
ctrl_outw(val, intc_ipr_address);
restore_flags(flags);
}
static void enable_onChip2_irq(unsigned int irq)
{
unsigned long val, flags;
/* Set priority in IPR back to original value */
int offset = ipr_data[irq-TIMER_IRQ].offset - 32;
int priority = ipr_data[irq-TIMER_IRQ].priority;
unsigned long intc_ipr_address = INTC_IPRC + (offset/16*INTC_SIZE);
unsigned short value = (priority << (offset%16));
save_and_cli(flags);
val = ctrl_inw(intc_ipr_address);
val |= value;
ctrl_outw(val, intc_ipr_address);
restore_flags(flags);
}
static void mask_and_ack_onChip2(unsigned int irq)
{
disable_onChip2_irq(irq);
if (IRQ0_IRQ <= irq && irq <= IRQ5_IRQ) {
/* Clear external interrupt request */
int a = ctrl_inb(INTC_IRR0);
a &= ~(1 << (irq - IRQ0_IRQ));
ctrl_outb(a, INTC_IRR0);
}
}
static void end_onChip2_irq(unsigned int irq)
{
enable_onChip2_irq(irq);
}
#endif /* CONFIG_CPU_SUBTYPE_SH7709 */
void __init init_IRQ(void)
{
int i;
for (i = TIMER_IRQ; i < NR_IRQS; i++) {
irq_desc[i].handler = &onChip_irq_type;
}
#ifdef CONFIG_CPU_SUBTYPE_SH7709
/*
* Initialize the Interrupt Controller (INTC)
* registers to their power on values
*/
ctrl_outb(0, INTC_IRR0);
ctrl_outb(0, INTC_IRR1);
ctrl_outb(0, INTC_IRR2);
ctrl_outw(0, INTC_ICR0);
ctrl_outw(0, INTC_ICR1);
ctrl_outw(0, INTC_ICR2);
ctrl_outw(0, INTC_INTER);
ctrl_outw(0, INTC_IPRA);
ctrl_outw(0, INTC_IPRB);
ctrl_outw(0, INTC_IPRC);
ctrl_outw(0, INTC_IPRD);
ctrl_outw(0, INTC_IPRE);
for (i = IRQ0_IRQ; i < NR_IRQS; i++) {
irq_desc[i].handler = &onChip2_irq_type;
}
/*
* Enable external irq(INTC IRQ mode).
* You should set corresponding bits of PFC to "00"
* to enable these interrupts.
*/
set_ipr_data(IRQ0_IRQ, IRQ0_IRP_OFFSET, IRQ0_PRIORITY);
set_ipr_data(IRQ1_IRQ, IRQ1_IRP_OFFSET, IRQ1_PRIORITY);
set_ipr_data(IRQ2_IRQ, IRQ2_IRP_OFFSET, IRQ2_PRIORITY);
set_ipr_data(IRQ3_IRQ, IRQ3_IRP_OFFSET, IRQ3_PRIORITY);
set_ipr_data(IRQ4_IRQ, IRQ4_IRP_OFFSET, IRQ4_PRIORITY);
set_ipr_data(IRQ5_IRQ, IRQ5_IRP_OFFSET, IRQ5_PRIORITY);
#endif /* CONFIG_CPU_SUBTYPE_SH7709 */
}
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