dn_ints.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:3k
- #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 occurredn",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 IRQn");
- 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 %dn",irq);
- return -ENXIO;
- }
- }
- void dn_free_irq(unsigned int irq, void *dev_id) {
- if((irq<0) || (irq>15)) {
- printk("Trying to free illegal IRQn");
- 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 irqn");
- }
- void dn_disable_irq(unsigned int irq) {
- printk("dn disable irqn");
- }
- int dn_get_irq_list(char *buf) {
- printk("dn get irq listn");
- return 0;
- }
- struct fb_info *dn_dummy_fb_init(long *mem_start) {
- printk("fb initn");
- 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 yetn");
- }