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126 lines
2.3 KiB
126 lines
2.3 KiB
20 years ago
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/jiffies.h>
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#include <linux/kernel_stat.h>
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#include <linux/timer.h>
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#include <asm/system.h>
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#include <asm/irq.h>
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#include <asm/traps.h>
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#include <asm/page.h>
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#include <asm/machdep.h>
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#include <asm/apollohw.h>
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#include <asm/errno.h>
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static irq_handler_t dn_irqs[16];
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irqreturn_t dn_process_int(int irq, struct pt_regs *fp)
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{
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irqreturn_t res = IRQ_NONE;
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if(dn_irqs[irq-160].handler) {
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res = dn_irqs[irq-160].handler(irq,dn_irqs[irq-160].dev_id,fp);
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} else {
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printk("spurious irq %d occurred\n",irq);
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}
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*(volatile unsigned char *)(pica)=0x20;
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*(volatile unsigned char *)(picb)=0x20;
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return res;
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}
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void dn_init_IRQ(void) {
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int i;
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for(i=0;i<16;i++) {
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dn_irqs[i].handler=NULL;
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dn_irqs[i].flags=IRQ_FLG_STD;
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dn_irqs[i].dev_id=NULL;
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dn_irqs[i].devname=NULL;
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}
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}
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int dn_request_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *), unsigned long flags, const char *devname, void *dev_id) {
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if((irq<0) || (irq>15)) {
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printk("Trying to request invalid IRQ\n");
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return -ENXIO;
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}
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if(!dn_irqs[irq].handler) {
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dn_irqs[irq].handler=handler;
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dn_irqs[irq].flags=IRQ_FLG_STD;
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dn_irqs[irq].dev_id=dev_id;
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dn_irqs[irq].devname=devname;
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if(irq<8)
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*(volatile unsigned char *)(pica+1)&=~(1<<irq);
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else
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*(volatile unsigned char *)(picb+1)&=~(1<<(irq-8));
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return 0;
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}
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else {
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printk("Trying to request already assigned irq %d\n",irq);
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return -ENXIO;
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}
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}
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void dn_free_irq(unsigned int irq, void *dev_id) {
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if((irq<0) || (irq>15)) {
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printk("Trying to free invalid IRQ\n");
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return ;
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}
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if(irq<8)
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*(volatile unsigned char *)(pica+1)|=(1<<irq);
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else
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*(volatile unsigned char *)(picb+1)|=(1<<(irq-8));
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dn_irqs[irq].handler=NULL;
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dn_irqs[irq].flags=IRQ_FLG_STD;
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dn_irqs[irq].dev_id=NULL;
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dn_irqs[irq].devname=NULL;
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return ;
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}
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void dn_enable_irq(unsigned int irq) {
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printk("dn enable irq\n");
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}
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void dn_disable_irq(unsigned int irq) {
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printk("dn disable irq\n");
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}
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int show_dn_interrupts(struct seq_file *p, void *v) {
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printk("dn get irq list\n");
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return 0;
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}
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struct fb_info *dn_dummy_fb_init(long *mem_start) {
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printk("fb init\n");
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return NULL;
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}
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void dn_dummy_video_setup(char *options,int *ints) {
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printk("no video yet\n");
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}
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