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.
162 lines
3.5 KiB
162 lines
3.5 KiB
/*
|
|
* $Id: setup.c,v 1.5 2004/03/16 00:07:50 lethal Exp $
|
|
* Copyright (C) 2000 YAEGASHI Takeshi
|
|
* Hitachi HD64461 companion chip support
|
|
*/
|
|
|
|
#include <linux/sched.h>
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/param.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/init.h>
|
|
#include <linux/irq.h>
|
|
#include <asm/io.h>
|
|
#include <asm/irq.h>
|
|
#include <asm/hd64461.h>
|
|
|
|
static void disable_hd64461_irq(unsigned int irq)
|
|
{
|
|
unsigned short nimr;
|
|
unsigned short mask = 1 << (irq - HD64461_IRQBASE);
|
|
|
|
nimr = inw(HD64461_NIMR);
|
|
nimr |= mask;
|
|
outw(nimr, HD64461_NIMR);
|
|
}
|
|
|
|
static void enable_hd64461_irq(unsigned int irq)
|
|
{
|
|
unsigned short nimr;
|
|
unsigned short mask = 1 << (irq - HD64461_IRQBASE);
|
|
|
|
nimr = inw(HD64461_NIMR);
|
|
nimr &= ~mask;
|
|
outw(nimr, HD64461_NIMR);
|
|
}
|
|
|
|
static void mask_and_ack_hd64461(unsigned int irq)
|
|
{
|
|
disable_hd64461_irq(irq);
|
|
#ifdef CONFIG_HD64461_ENABLER
|
|
if (irq == HD64461_IRQBASE + 13)
|
|
outb(0x00, HD64461_PCC1CSCR);
|
|
#endif
|
|
}
|
|
|
|
static void end_hd64461_irq(unsigned int irq)
|
|
{
|
|
if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
|
|
enable_hd64461_irq(irq);
|
|
}
|
|
|
|
static unsigned int startup_hd64461_irq(unsigned int irq)
|
|
{
|
|
enable_hd64461_irq(irq);
|
|
return 0;
|
|
}
|
|
|
|
static void shutdown_hd64461_irq(unsigned int irq)
|
|
{
|
|
disable_hd64461_irq(irq);
|
|
}
|
|
|
|
static struct hw_interrupt_type hd64461_irq_type = {
|
|
.typename = "HD64461-IRQ",
|
|
.startup = startup_hd64461_irq,
|
|
.shutdown = shutdown_hd64461_irq,
|
|
.enable = enable_hd64461_irq,
|
|
.disable = disable_hd64461_irq,
|
|
.ack = mask_and_ack_hd64461,
|
|
.end = end_hd64461_irq,
|
|
};
|
|
|
|
static irqreturn_t hd64461_interrupt(int irq, void *dev_id)
|
|
{
|
|
printk(KERN_INFO
|
|
"HD64461: spurious interrupt, nirr: 0x%x nimr: 0x%x\n",
|
|
inw(HD64461_NIRR), inw(HD64461_NIMR));
|
|
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
static struct {
|
|
int (*func) (int, void *);
|
|
void *dev;
|
|
} hd64461_demux[HD64461_IRQ_NUM];
|
|
|
|
void hd64461_register_irq_demux(int irq,
|
|
int (*demux) (int irq, void *dev), void *dev)
|
|
{
|
|
hd64461_demux[irq - HD64461_IRQBASE].func = demux;
|
|
hd64461_demux[irq - HD64461_IRQBASE].dev = dev;
|
|
}
|
|
|
|
EXPORT_SYMBOL(hd64461_register_irq_demux);
|
|
|
|
void hd64461_unregister_irq_demux(int irq)
|
|
{
|
|
hd64461_demux[irq - HD64461_IRQBASE].func = 0;
|
|
}
|
|
|
|
EXPORT_SYMBOL(hd64461_unregister_irq_demux);
|
|
|
|
int hd64461_irq_demux(int irq)
|
|
{
|
|
if (irq == CONFIG_HD64461_IRQ) {
|
|
unsigned short bit;
|
|
unsigned short nirr = inw(HD64461_NIRR);
|
|
unsigned short nimr = inw(HD64461_NIMR);
|
|
int i;
|
|
|
|
nirr &= ~nimr;
|
|
for (bit = 1, i = 0; i < 16; bit <<= 1, i++)
|
|
if (nirr & bit)
|
|
break;
|
|
if (i == 16)
|
|
irq = CONFIG_HD64461_IRQ;
|
|
else {
|
|
irq = HD64461_IRQBASE + i;
|
|
if (hd64461_demux[i].func != 0) {
|
|
irq = hd64461_demux[i].func(irq, hd64461_demux[i].dev);
|
|
}
|
|
}
|
|
}
|
|
return __irq_demux(irq);
|
|
}
|
|
|
|
static struct irqaction irq0 = { hd64461_interrupt, IRQF_DISABLED, CPU_MASK_NONE, "HD64461", NULL, NULL };
|
|
|
|
int __init setup_hd64461(void)
|
|
{
|
|
int i;
|
|
|
|
if (!MACH_HD64461)
|
|
return 0;
|
|
|
|
printk(KERN_INFO
|
|
"HD64461 configured at 0x%x on irq %d(mapped into %d to %d)\n",
|
|
CONFIG_HD64461_IOBASE, CONFIG_HD64461_IRQ, HD64461_IRQBASE,
|
|
HD64461_IRQBASE + 15);
|
|
|
|
#if defined(CONFIG_CPU_SUBTYPE_SH7709) /* Should be at processor specific part.. */
|
|
outw(0x2240, INTC_ICR1);
|
|
#endif
|
|
outw(0xffff, HD64461_NIMR);
|
|
|
|
for (i = HD64461_IRQBASE; i < HD64461_IRQBASE + 16; i++) {
|
|
irq_desc[i].chip = &hd64461_irq_type;
|
|
}
|
|
|
|
setup_irq(CONFIG_HD64461_IRQ, &irq0);
|
|
|
|
#ifdef CONFIG_HD64461_ENABLER
|
|
printk(KERN_INFO "HD64461: enabling PCMCIA devices\n");
|
|
outb(0x4c, HD64461_PCC1CSCIER);
|
|
outb(0x00, HD64461_PCC1CSCR);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
module_init(setup_hd64461);
|
|
|