Viewing file:  dn_ints.c (2.89 KB) -rw-r--r--
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#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/kernel_stat.h>
#include <asm/system.h>
#include <asm/irq.h>
#include <asm/traps.h>
#include <asm/page.h>
#include <asm/machdep.h>
#include <asm/apollohw.h>
static irq_handler_t dn_irqs[16];
extern void write_keyb_cmd(u_short length, u_char *cmd);
static char BellOnCommand[] = { 0xFF, 0x21, 0x81 },
BellOffCommand[] = { 0xFF, 0x21, 0x82 };
extern void dn_serial_print (const char *str);
void dn_process_int(int irq, struct pt_regs *fp) {
if(dn_irqs[irq-160].handler) {
dn_irqs[irq-160].handler(irq,dn_irqs[irq-160].dev_id,fp);
}
else {
printk("spurious irq %d occurred\n",irq);
}
*(volatile unsigned char *)(pica)=0x20;
*(volatile unsigned char *)(picb)=0x20;
}
void dn_init_IRQ(void) {
int i;
for(i=0;i<16;i++) {
dn_irqs[i].handler=NULL;
dn_irqs[i].flags=IRQ_FLG_STD;
dn_irqs[i].dev_id=NULL;
dn_irqs[i].devname=NULL;
}
}
int dn_request_irq(unsigned int irq, void (*handler)(int, void *, struct pt_regs *), unsigned long flags, const char *devname, void *dev_id) {
if((irq<0) || (irq>15)) {
printk("Trying to request illegal IRQ\n");
return -ENXIO;
}
if(!dn_irqs[irq].handler) {
dn_irqs[irq].handler=handler;
dn_irqs[irq].flags=IRQ_FLG_STD;
dn_irqs[irq].dev_id=dev_id;
dn_irqs[irq].devname=devname;
if(irq<8)
*(volatile unsigned char *)(pica+1)&=~(1<<irq);
else
*(volatile unsigned char *)(picb+1)&=~(1<<(irq-8));
return 0;
}
else {
printk("Trying to request already assigned irq %d\n",irq);
return -ENXIO;
}
}
void dn_free_irq(unsigned int irq, void *dev_id) {
if((irq<0) || (irq>15)) {
printk("Trying to free illegal IRQ\n");
return ;
}
if(irq<8)
*(volatile unsigned char *)(pica+1)|=(1<<irq);
else
*(volatile unsigned char *)(picb+1)|=(1<<(irq-8));
dn_irqs[irq].handler=NULL;
dn_irqs[irq].flags=IRQ_FLG_STD;
dn_irqs[irq].dev_id=NULL;
dn_irqs[irq].devname=NULL;
return ;
}
void dn_enable_irq(unsigned int irq) {
printk("dn enable irq\n");
}
void dn_disable_irq(unsigned int irq) {
printk("dn disable irq\n");
}
int dn_get_irq_list(char *buf) {
printk("dn get irq list\n");
return 0;
}
struct fb_info *dn_dummy_fb_init(long *mem_start) {
printk("fb init\n");
return NULL;
}
static void dn_nosound (unsigned long ignored) {
write_keyb_cmd(sizeof(BellOffCommand),BellOffCommand);
}
void dn_mksound( unsigned int count, unsigned int ticks ) {
static struct timer_list sound_timer = { function: dn_nosound };
del_timer( &sound_timer );
if(count) {
write_keyb_cmd(sizeof(BellOnCommand),BellOnCommand);
if (ticks) {
sound_timer.expires = jiffies + ticks;
add_timer( &sound_timer );
}
}
else
write_keyb_cmd(sizeof(BellOffCommand),BellOffCommand);
}
void dn_dummy_video_setup(char *options,int *ints) {
printk("no video yet\n");
}
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