added timer/counter interrupt support

[my-code/arm.git] / betty / interrupts.c

diff --git a/betty/interrupts.c b/betty/interrupts.c
index a96cc2f..0e0baa3 100644 (file)
--- a/betty/interrupts.c
+++ b/betty/interrupts.c
@@ -6,38 +6,43 @@
  */
 
 #include "interrupts.h"
+#include "functions.h"
 
-/*
- * module static interrupt variable
- */
-
+// 'module global' interrupt variable
 static t_interrupt interrupt;
 
 /*
  * functions
  */
 
+// generaal interrupt handling
+
 void interrupt_init(void) {
 
-       memset(&interrupt,0,sizeof(t_interrupt));
-       VICSoftIntClear=0xff;
-       VICIntEnClear=0xff;
+       interrupt.default_soft_callback=0;
+       VICSoftIntClr=0xffffffff;
+       VICIntEnClr=0xffffffff;
        VICDefVectAddr=0;
 }
 
-void interrupt_set_default_callback(void *callback) {
+void interrupt_set_default_callback(u32 callback_addr) {
 
-       VICDefVectAddr=(u32)callback;
+       VICDefVectAddr=callback_addr;
 }
 
 void interrupt_set_soft_callback(void (*callback)(void)) {
 
-       interrupt->default_soft_callback=callback;
+       interrupt.default_soft_callback=callback;
+}
+
+void interrupt_set_fiq_callback(void (*callback)(void)) {
+
+       interrupt.fiq_callback=callback;
 }
 
 void interrupt_soft_clear(u8 src_number) {
 
-       VICSoftIntClear=(1<<src_number);
+       VICSoftIntClr=(1<<src_number);
 }
 void interrupt_clear(u8 src_number) {
 
@@ -45,14 +50,14 @@ void interrupt_clear(u8 src_number) {
        u32 *addr;
        u32 *cntl;
 
-       VICIntEnClear=(1<<src_number);
+       VICIntEnClr=(1<<src_number);
        VICIntSelect&=~(1<<src_number);
 
-       addr=&VICVectAddr0;
-       cntl=&VICVectCntl0;
+       addr=(u32 *)&VICVectAddr0;
+       cntl=(u32 *)&VICVectCntl0;
 
        for(cnt=0;cnt<INTERRUPT_MAX_VIC;cnt++) {
-               if(cntl[cnt]&0x1f==src_number) {
+               if((cntl[cnt]&0x1f)==src_number) {
                        *((volatile u32 *)(addr+cnt))=0;
                        *((volatile u32 *)(cntl+cnt))=0;
                }
@@ -64,37 +69,152 @@ void interrupt_soft_enable(u8 src_number) {
        VICSoftInt=(1<<src_number);
 }
 
-int interrupt_enable(u8 src_number,u8 mode,u8 priority,u32 callback_addr) {
+int interrupt_enable(u8 src_number,u8 mode,u8 prio,u32 callback_addr) {
 
        u32 *addr;
        u32 *cntl;
 
-       addr=&VICVectAddr0;
-       cntl=&VICVectCntl0;
+       addr=(u32 *)&VICVectAddr0;
+       cntl=(u32 *)&VICVectCntl0;
 
        /* check whether this ir source is allready assigned */
        if(VICIntEnable&(1<<src_number))
                return INTERRUPT_USED;
 
-       /* force interrupt */
-       VICIntEnable=(1<<src_number);
-
+       /* prepare depending on mode */
        switch(mode) {
-               case INTERRUPT_FIQ:
+               case INTERRUPT_MODE_FIQ:
                        VICIntSelect|=(1<<src_number);
                        break;
-               case INTERRUPT_VIRQ:
-                       if(addr[p]&0x3f)
-                               return INTERRUP_PRIORITY_USED;
-                       *((volatile u32 *)(addr+p))=callback_addr;
-                       *((volatile u32 *)(cntl+p))=src_number&0x1f+(1<<5);
-               case INTERRUPT_IRQ:
-               case default:
+               case INTERRUPT_MODE_VIRQ:
+                       if(addr[prio]&0x3f)
+                               return INTERRUPT_PRIORITY_USED;
+                       *((volatile u32 *)(addr+prio))=callback_addr;
+                       *((volatile u32 *)(cntl+prio))=(src_number&0x1f)+0x20;
+               case INTERRUPT_MODE_IRQ:
+               default:
+                       break;
        }
 
+       /* force interrupt */
+       VICIntEnable=(1<<src_number);
+
        return INTERRUPT_SET;
 }
 
+int interrupt_change_callback(u8 src_number,u32 callback) {
+
+       int i;
+       u32 *addr,*cntl;
+
+       cntl=(u32 *)&VICVectCntl0;
+       addr=(u32 *)&VICVectAddr0;
+
+       i=0;
+       while(i<INTERRUPT_MAX_VIC) {
+               if((*cntl&0x1f)==src_number) {
+                       *(addr+i)=callback;
+                       return INTERRUPT_CALLBACK_CHANGED;
+               }
+               i++;
+       }
+
+       return INTERRUPT_SRC_NOT_USED;
+}
+
+void interrupt_ack(void) {
+
+       VICVectAddr=0;
+}
+
+// specific interrupt handling
+
+// external interrupts
+void interrupt_ext_ir_config(u8 eint,u8 wakeup,u8 mode,u8 polarity) {
+
+       if(eint>3)
+               return;
+
+       if(wakeup)
+               EXTWAKE=(EXTWAKE&0xf)|(1<<eint);
+
+       EXTMODE=(EXTMODE&0xf)|(mode<<eint);
+       EXTPOLAR=(EXTPOLAR&0xf)|(polarity<<eint);
+}
+
+void interrupt_ext_ir_set(u8 eint) {
+
+       if(eint>3)
+               return;
+
+       EXTINT=(1<<eint);
+}
+
+// timer counter interrupts
+void interrupt_tc_config(u8 tcnum,u8 mode,u8 cap,u32 psc) {
+
+       if(tcnum>1)
+               return;
+
+       if(tcnum==0) {
+               T0TCR=0x03;
+               T0CTCR=mode|(cap<<2);
+               T0PR=psc;
+       }
+       else {
+               T1TCR=0x03;
+               T1CTCR=mode|(cap<<2);
+               T1PR=psc;
+       }
+}
+
+void interrupt_tc_match_config(u8 tcnum,u8 mnum,u32 val,u8 mode) {
+
+       u32 *mraddr;
+
+       if(tcnum>1)
+               return;
+
+       if(mnum>3)
+               return;
+
+       if(tcnum==0) {
+               T0MCR=mode<<(3*mnum);
+               mrddr=&T0MR0
+       }
+       else {
+               T1MCR=mode<<(3*mnum);
+               mrddr=&T1MR0
+       }
+
+       mraddr[mnum]=val;
+}
+
+void interrupt_tc_capt_config(u8 tcnum,u8 cnum,u8 mode) {
+
+       if(tcnum>1)
+               return;
+
+       if(cnum>3)
+               return;
+
+       if(tcnum==0)
+               T0CCR=mode<<(3*cnum);
+       else
+               T1CCR=mode<<(3*cnum);
+}
+
+void interrupt_tc_ir_set(u8 tcnum,u8 tcmc) {
+
+       if(tcnum>1)
+               return;
+
+       if(tcnum==0)
+               T0IR=tcmc;
+       else
+               T1IR=tcmc;
+}
+
 /*
  * the actual exception handlers (as defined in startup.s)
  */
@@ -124,5 +244,8 @@ void interrupt_handler_data_abort(void) {
 
 // fiq
 void interrupt_handler_fiq(void) {
+
+       if(interrupt.fiq_callback)
+               interrupt.fiq_callback();
 }