arch/m68k/apollo/dn_ints.c

   1 #include <linux/types.h>
   2 #include <linux/kernel.h>
   3 #include <linux/jiffies.h>
   4 #include <linux/kernel_stat.h>
   5 #include <linux/timer.h>
   6
   7 #include <asm/system.h>
   8 #include <asm/irq.h>
   9 #include <asm/traps.h>
  10 #include <asm/page.h>
  11 #include <asm/machdep.h>
  12 #include <asm/apollohw.h>
  13 #include <asm/errno.h>
  14
  15 static irq_handler_t dn_irqs[16];
  16
  17 irqreturn_t dn_process_int(int irq, struct pt_regs *fp)
  18 {
  19   irqreturn_t res = IRQ_NONE;
  20
  21   if(dn_irqs[irq-160].handler) {
  22     res = dn_irqs[irq-160].handler(irq,dn_irqs[irq-160].dev_id,fp);
  23   } else {
  24     printk("spurious irq %d occurred\n",irq);
  25   }
  26
  27   *(volatile unsigned char *)(pica)=0x20;
  28   *(volatile unsigned char *)(picb)=0x20;
  29
  30   return res;
  31 }
  32
  33 void dn_init_IRQ(void) {
  34
  35   int i;
  36
  37   for(i=0;i<16;i++) {
  38     dn_irqs[i].handler=NULL;
  39     dn_irqs[i].flags=IRQ_FLG_STD;
  40     dn_irqs[i].dev_id=NULL;
  41     dn_irqs[i].devname=NULL;
  42   }
  43
  44 }
  45
  46 int dn_request_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *), unsigned long flags, const char *devname, void *dev_id) {
  47
  48   if((irq<0) || (irq>15)) {
  49     printk("Trying to request invalid IRQ\n");
  50     return -ENXIO;
  51   }
  52
  53   if(!dn_irqs[irq].handler) {
  54     dn_irqs[irq].handler=handler;
  55     dn_irqs[irq].flags=IRQ_FLG_STD;
  56     dn_irqs[irq].dev_id=dev_id;
  57     dn_irqs[irq].devname=devname;
  58     if(irq<8)
  59       *(volatile unsigned char *)(pica+1)&=~(1<<irq);
  60     else
  61       *(volatile unsigned char *)(picb+1)&=~(1<<(irq-8));
  62
  63     return 0;
  64   }
  65   else {
  66     printk("Trying to request already assigned irq %d\n",irq);
  67     return -ENXIO;
  68   }
  69
  70 }
  71
  72 void dn_free_irq(unsigned int irq, void *dev_id) {
  73
  74   if((irq<0) || (irq>15)) {
  75     printk("Trying to free invalid IRQ\n");
  76     return ;
  77   }
  78
  79   if(irq<8)
  80     *(volatile unsigned char *)(pica+1)|=(1<<irq);
  81   else
  82     *(volatile unsigned char *)(picb+1)|=(1<<(irq-8));
  83
  84   dn_irqs[irq].handler=NULL;
  85   dn_irqs[irq].flags=IRQ_FLG_STD;
  86   dn_irqs[irq].dev_id=NULL;
  87   dn_irqs[irq].devname=NULL;
  88
  89   return ;
  90
  91 }
  92
  93 void dn_enable_irq(unsigned int irq) {
  94
  95   printk("dn enable irq\n");
  96
  97 }
  98
  99 void dn_disable_irq(unsigned int irq) {
 100
 101   printk("dn disable irq\n");
 102
 103 }
 104
 105 int show_dn_interrupts(struct seq_file *p, void *v) {
 106
 107   printk("dn get irq list\n");
 108
 109   return 0;
 110
 111 }
 112
 113 struct fb_info *dn_dummy_fb_init(long *mem_start) {
 114
 115   printk("fb init\n");
 116
 117   return NULL;
 118
 119 }
 120
 121 void dn_dummy_video_setup(char *options,int *ints) {
 122
 123   printk("no video yet\n");
 124
 125 }