forked from Minki/linux
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
340 lines
9.4 KiB
C
340 lines
9.4 KiB
C
/* $Id: irq_ipr.c,v 1.1.2.1 2002/11/17 10:53:43 mrbrown Exp $
|
|
*
|
|
* linux/arch/sh/kernel/irq_ipr.c
|
|
*
|
|
* Copyright (C) 1999 Niibe Yutaka & Takeshi Yaegashi
|
|
* Copyright (C) 2000 Kazumoto Kojima
|
|
* Copyright (C) 2003 Takashi Kusuda <kusuda-takashi@hitachi-ul.co.jp>
|
|
*
|
|
* Interrupt handling for IPR-based IRQ.
|
|
*
|
|
* Supported system:
|
|
* On-chip supporting modules (TMU, RTC, etc.).
|
|
* On-chip supporting modules for SH7709/SH7709A/SH7729/SH7300.
|
|
* Hitachi SolutionEngine external I/O:
|
|
* MS7709SE01, MS7709ASE01, and MS7750SE01
|
|
*
|
|
*/
|
|
|
|
#include <linux/config.h>
|
|
#include <linux/init.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/module.h>
|
|
|
|
#include <asm/system.h>
|
|
#include <asm/io.h>
|
|
#include <asm/machvec.h>
|
|
|
|
struct ipr_data {
|
|
unsigned int addr; /* Address of Interrupt Priority Register */
|
|
int shift; /* Shifts of the 16-bit data */
|
|
int priority; /* The priority */
|
|
};
|
|
static struct ipr_data ipr_data[NR_IRQS];
|
|
|
|
static void enable_ipr_irq(unsigned int irq);
|
|
static void disable_ipr_irq(unsigned int irq);
|
|
|
|
/* shutdown is same as "disable" */
|
|
#define shutdown_ipr_irq disable_ipr_irq
|
|
|
|
static void mask_and_ack_ipr(unsigned int);
|
|
static void end_ipr_irq(unsigned int irq);
|
|
|
|
static unsigned int startup_ipr_irq(unsigned int irq)
|
|
{
|
|
enable_ipr_irq(irq);
|
|
return 0; /* never anything pending */
|
|
}
|
|
|
|
static struct hw_interrupt_type ipr_irq_type = {
|
|
"IPR-IRQ",
|
|
startup_ipr_irq,
|
|
shutdown_ipr_irq,
|
|
enable_ipr_irq,
|
|
disable_ipr_irq,
|
|
mask_and_ack_ipr,
|
|
end_ipr_irq
|
|
};
|
|
|
|
static void disable_ipr_irq(unsigned int irq)
|
|
{
|
|
unsigned long val, flags;
|
|
unsigned int addr = ipr_data[irq].addr;
|
|
unsigned short mask = 0xffff ^ (0x0f << ipr_data[irq].shift);
|
|
|
|
/* Set the priority in IPR to 0 */
|
|
local_irq_save(flags);
|
|
val = ctrl_inw(addr);
|
|
val &= mask;
|
|
ctrl_outw(val, addr);
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static void enable_ipr_irq(unsigned int irq)
|
|
{
|
|
unsigned long val, flags;
|
|
unsigned int addr = ipr_data[irq].addr;
|
|
int priority = ipr_data[irq].priority;
|
|
unsigned short value = (priority << ipr_data[irq].shift);
|
|
|
|
/* Set priority in IPR back to original value */
|
|
local_irq_save(flags);
|
|
val = ctrl_inw(addr);
|
|
val |= value;
|
|
ctrl_outw(val, addr);
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static void mask_and_ack_ipr(unsigned int irq)
|
|
{
|
|
disable_ipr_irq(irq);
|
|
|
|
#if defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7709) || \
|
|
defined(CONFIG_CPU_SUBTYPE_SH7300) || defined(CONFIG_CPU_SUBTYPE_SH7705)
|
|
/* This is needed when we use edge triggered setting */
|
|
/* XXX: Is it really needed? */
|
|
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);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static void end_ipr_irq(unsigned int irq)
|
|
{
|
|
if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
|
|
enable_ipr_irq(irq);
|
|
}
|
|
|
|
void make_ipr_irq(unsigned int irq, unsigned int addr, int pos, int priority)
|
|
{
|
|
disable_irq_nosync(irq);
|
|
ipr_data[irq].addr = addr;
|
|
ipr_data[irq].shift = pos*4; /* POSition (0-3) x 4 means shift */
|
|
ipr_data[irq].priority = priority;
|
|
|
|
irq_desc[irq].handler = &ipr_irq_type;
|
|
disable_ipr_irq(irq);
|
|
}
|
|
|
|
#if defined(CONFIG_CPU_SUBTYPE_SH7705) || \
|
|
defined(CONFIG_CPU_SUBTYPE_SH7707) || \
|
|
defined(CONFIG_CPU_SUBTYPE_SH7709)
|
|
static unsigned char pint_map[256];
|
|
static unsigned long portcr_mask = 0;
|
|
|
|
static void enable_pint_irq(unsigned int irq);
|
|
static void disable_pint_irq(unsigned int irq);
|
|
|
|
/* shutdown is same as "disable" */
|
|
#define shutdown_pint_irq disable_pint_irq
|
|
|
|
static void mask_and_ack_pint(unsigned int);
|
|
static void end_pint_irq(unsigned int irq);
|
|
|
|
static unsigned int startup_pint_irq(unsigned int irq)
|
|
{
|
|
enable_pint_irq(irq);
|
|
return 0; /* never anything pending */
|
|
}
|
|
|
|
static struct hw_interrupt_type pint_irq_type = {
|
|
"PINT-IRQ",
|
|
startup_pint_irq,
|
|
shutdown_pint_irq,
|
|
enable_pint_irq,
|
|
disable_pint_irq,
|
|
mask_and_ack_pint,
|
|
end_pint_irq
|
|
};
|
|
|
|
static void disable_pint_irq(unsigned int irq)
|
|
{
|
|
unsigned long val, flags;
|
|
|
|
local_irq_save(flags);
|
|
val = ctrl_inw(INTC_INTER);
|
|
val &= ~(1 << (irq - PINT_IRQ_BASE));
|
|
ctrl_outw(val, INTC_INTER); /* disable PINTn */
|
|
portcr_mask &= ~(3 << (irq - PINT_IRQ_BASE)*2);
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static void enable_pint_irq(unsigned int irq)
|
|
{
|
|
unsigned long val, flags;
|
|
|
|
local_irq_save(flags);
|
|
val = ctrl_inw(INTC_INTER);
|
|
val |= 1 << (irq - PINT_IRQ_BASE);
|
|
ctrl_outw(val, INTC_INTER); /* enable PINTn */
|
|
portcr_mask |= 3 << (irq - PINT_IRQ_BASE)*2;
|
|
local_irq_restore(flags);
|
|
}
|
|
|
|
static void mask_and_ack_pint(unsigned int irq)
|
|
{
|
|
disable_pint_irq(irq);
|
|
}
|
|
|
|
static void end_pint_irq(unsigned int irq)
|
|
{
|
|
if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
|
|
enable_pint_irq(irq);
|
|
}
|
|
|
|
void make_pint_irq(unsigned int irq)
|
|
{
|
|
disable_irq_nosync(irq);
|
|
irq_desc[irq].handler = &pint_irq_type;
|
|
disable_pint_irq(irq);
|
|
}
|
|
#endif
|
|
|
|
void __init init_IRQ(void)
|
|
{
|
|
#if defined(CONFIG_CPU_SUBTYPE_SH7705) || \
|
|
defined(CONFIG_CPU_SUBTYPE_SH7707) || \
|
|
defined(CONFIG_CPU_SUBTYPE_SH7709)
|
|
int i;
|
|
#endif
|
|
|
|
make_ipr_irq(TIMER_IRQ, TIMER_IPR_ADDR, TIMER_IPR_POS, TIMER_PRIORITY);
|
|
make_ipr_irq(TIMER1_IRQ, TIMER1_IPR_ADDR, TIMER1_IPR_POS, TIMER1_PRIORITY);
|
|
#if defined(CONFIG_SH_RTC)
|
|
make_ipr_irq(RTC_IRQ, RTC_IPR_ADDR, RTC_IPR_POS, RTC_PRIORITY);
|
|
#endif
|
|
|
|
#ifdef SCI_ERI_IRQ
|
|
make_ipr_irq(SCI_ERI_IRQ, SCI_IPR_ADDR, SCI_IPR_POS, SCI_PRIORITY);
|
|
make_ipr_irq(SCI_RXI_IRQ, SCI_IPR_ADDR, SCI_IPR_POS, SCI_PRIORITY);
|
|
make_ipr_irq(SCI_TXI_IRQ, SCI_IPR_ADDR, SCI_IPR_POS, SCI_PRIORITY);
|
|
#endif
|
|
|
|
#ifdef SCIF1_ERI_IRQ
|
|
make_ipr_irq(SCIF1_ERI_IRQ, SCIF1_IPR_ADDR, SCIF1_IPR_POS, SCIF1_PRIORITY);
|
|
make_ipr_irq(SCIF1_RXI_IRQ, SCIF1_IPR_ADDR, SCIF1_IPR_POS, SCIF1_PRIORITY);
|
|
make_ipr_irq(SCIF1_BRI_IRQ, SCIF1_IPR_ADDR, SCIF1_IPR_POS, SCIF1_PRIORITY);
|
|
make_ipr_irq(SCIF1_TXI_IRQ, SCIF1_IPR_ADDR, SCIF1_IPR_POS, SCIF1_PRIORITY);
|
|
#endif
|
|
|
|
#if defined(CONFIG_CPU_SUBTYPE_SH7300)
|
|
make_ipr_irq(SCIF0_IRQ, SCIF0_IPR_ADDR, SCIF0_IPR_POS, SCIF0_PRIORITY);
|
|
make_ipr_irq(DMTE2_IRQ, DMA1_IPR_ADDR, DMA1_IPR_POS, DMA1_PRIORITY);
|
|
make_ipr_irq(DMTE3_IRQ, DMA1_IPR_ADDR, DMA1_IPR_POS, DMA1_PRIORITY);
|
|
make_ipr_irq(VIO_IRQ, VIO_IPR_ADDR, VIO_IPR_POS, VIO_PRIORITY);
|
|
#endif
|
|
|
|
#ifdef SCIF_ERI_IRQ
|
|
make_ipr_irq(SCIF_ERI_IRQ, SCIF_IPR_ADDR, SCIF_IPR_POS, SCIF_PRIORITY);
|
|
make_ipr_irq(SCIF_RXI_IRQ, SCIF_IPR_ADDR, SCIF_IPR_POS, SCIF_PRIORITY);
|
|
make_ipr_irq(SCIF_BRI_IRQ, SCIF_IPR_ADDR, SCIF_IPR_POS, SCIF_PRIORITY);
|
|
make_ipr_irq(SCIF_TXI_IRQ, SCIF_IPR_ADDR, SCIF_IPR_POS, SCIF_PRIORITY);
|
|
#endif
|
|
|
|
#ifdef IRDA_ERI_IRQ
|
|
make_ipr_irq(IRDA_ERI_IRQ, IRDA_IPR_ADDR, IRDA_IPR_POS, IRDA_PRIORITY);
|
|
make_ipr_irq(IRDA_RXI_IRQ, IRDA_IPR_ADDR, IRDA_IPR_POS, IRDA_PRIORITY);
|
|
make_ipr_irq(IRDA_BRI_IRQ, IRDA_IPR_ADDR, IRDA_IPR_POS, IRDA_PRIORITY);
|
|
make_ipr_irq(IRDA_TXI_IRQ, IRDA_IPR_ADDR, IRDA_IPR_POS, IRDA_PRIORITY);
|
|
#endif
|
|
|
|
#if defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7709) || \
|
|
defined(CONFIG_CPU_SUBTYPE_SH7300) || defined(CONFIG_CPU_SUBTYPE_SH7705)
|
|
/*
|
|
* Initialize the Interrupt Controller (INTC)
|
|
* registers to their power on values
|
|
*/
|
|
|
|
/*
|
|
* Enable external irq (INTC IRQ mode).
|
|
* You should set corresponding bits of PFC to "00"
|
|
* to enable these interrupts.
|
|
*/
|
|
make_ipr_irq(IRQ0_IRQ, IRQ0_IPR_ADDR, IRQ0_IPR_POS, IRQ0_PRIORITY);
|
|
make_ipr_irq(IRQ1_IRQ, IRQ1_IPR_ADDR, IRQ1_IPR_POS, IRQ1_PRIORITY);
|
|
make_ipr_irq(IRQ2_IRQ, IRQ2_IPR_ADDR, IRQ2_IPR_POS, IRQ2_PRIORITY);
|
|
make_ipr_irq(IRQ3_IRQ, IRQ3_IPR_ADDR, IRQ3_IPR_POS, IRQ3_PRIORITY);
|
|
make_ipr_irq(IRQ4_IRQ, IRQ4_IPR_ADDR, IRQ4_IPR_POS, IRQ4_PRIORITY);
|
|
make_ipr_irq(IRQ5_IRQ, IRQ5_IPR_ADDR, IRQ5_IPR_POS, IRQ5_PRIORITY);
|
|
#if !defined(CONFIG_CPU_SUBTYPE_SH7300)
|
|
make_ipr_irq(PINT0_IRQ, PINT0_IPR_ADDR, PINT0_IPR_POS, PINT0_PRIORITY);
|
|
make_ipr_irq(PINT8_IRQ, PINT8_IPR_ADDR, PINT8_IPR_POS, PINT8_PRIORITY);
|
|
enable_ipr_irq(PINT0_IRQ);
|
|
enable_ipr_irq(PINT8_IRQ);
|
|
|
|
for(i = 0; i < 16; i++)
|
|
make_pint_irq(PINT_IRQ_BASE + i);
|
|
for(i = 0; i < 256; i++)
|
|
{
|
|
if(i & 1) pint_map[i] = 0;
|
|
else if(i & 2) pint_map[i] = 1;
|
|
else if(i & 4) pint_map[i] = 2;
|
|
else if(i & 8) pint_map[i] = 3;
|
|
else if(i & 0x10) pint_map[i] = 4;
|
|
else if(i & 0x20) pint_map[i] = 5;
|
|
else if(i & 0x40) pint_map[i] = 6;
|
|
else if(i & 0x80) pint_map[i] = 7;
|
|
}
|
|
#endif /* !CONFIG_CPU_SUBTYPE_SH7300 */
|
|
#endif /* CONFIG_CPU_SUBTYPE_SH7707 || CONFIG_CPU_SUBTYPE_SH7709 || CONFIG_CPU_SUBTYPE_SH7300*/
|
|
|
|
#ifdef CONFIG_CPU_SUBTYPE_ST40
|
|
init_IRQ_intc2();
|
|
#endif
|
|
|
|
/* Perform the machine specific initialisation */
|
|
if (sh_mv.mv_init_irq != NULL) {
|
|
sh_mv.mv_init_irq();
|
|
}
|
|
}
|
|
#if defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7709) || \
|
|
defined(CONFIG_CPU_SUBTYPE_SH7300) || defined(CONFIG_CPU_SUBTYPE_SH7705)
|
|
int ipr_irq_demux(int irq)
|
|
{
|
|
#if !defined(CONFIG_CPU_SUBTYPE_SH7300)
|
|
unsigned long creg, dreg, d, sav;
|
|
|
|
if(irq == PINT0_IRQ)
|
|
{
|
|
#if defined(CONFIG_CPU_SUBTYPE_SH7707)
|
|
creg = PORT_PACR;
|
|
dreg = PORT_PADR;
|
|
#else
|
|
creg = PORT_PCCR;
|
|
dreg = PORT_PCDR;
|
|
#endif
|
|
sav = ctrl_inw(creg);
|
|
ctrl_outw(sav | portcr_mask, creg);
|
|
d = (~ctrl_inb(dreg) ^ ctrl_inw(INTC_ICR2)) & ctrl_inw(INTC_INTER) & 0xff;
|
|
ctrl_outw(sav, creg);
|
|
if(d == 0) return irq;
|
|
return PINT_IRQ_BASE + pint_map[d];
|
|
}
|
|
else if(irq == PINT8_IRQ)
|
|
{
|
|
#if defined(CONFIG_CPU_SUBTYPE_SH7707)
|
|
creg = PORT_PBCR;
|
|
dreg = PORT_PBDR;
|
|
#else
|
|
creg = PORT_PFCR;
|
|
dreg = PORT_PFDR;
|
|
#endif
|
|
sav = ctrl_inw(creg);
|
|
ctrl_outw(sav | (portcr_mask >> 16), creg);
|
|
d = (~ctrl_inb(dreg) ^ (ctrl_inw(INTC_ICR2) >> 8)) & (ctrl_inw(INTC_INTER) >> 8) & 0xff;
|
|
ctrl_outw(sav, creg);
|
|
if(d == 0) return irq;
|
|
return PINT_IRQ_BASE + 8 + pint_map[d];
|
|
}
|
|
#endif
|
|
return irq;
|
|
}
|
|
#endif
|
|
|
|
EXPORT_SYMBOL(make_ipr_irq);
|
|
|