From 1473a4be06e0cc16875bf6c49719a2c92826f908 Mon Sep 17 00:00:00 2001
From: hackbard <hackbard@sage.physik.uni-augsburg.de>
Date: Fri, 21 Sep 2007 11:41:30 +0200
Subject: [PATCH] added timer/counter interrupt support

---
 betty/interrupts.c | 90 ++++++++++++++++++++++++++++++++++++++++++----
 betty/interrupts.h | 37 ++++++++++++++++++-
 2 files changed, 120 insertions(+), 7 deletions(-)

diff --git a/betty/interrupts.c b/betty/interrupts.c
index e344f05..0e0baa3 100644
--- a/betty/interrupts.c
+++ b/betty/interrupts.c
@@ -15,6 +15,8 @@ static t_interrupt interrupt;
  * functions
  */
 
+// generaal interrupt handling
+
 void interrupt_init(void) {
 
 	interrupt.default_soft_callback=0;
@@ -33,6 +35,11 @@ void interrupt_set_soft_callback(void (*callback)(void)) {
 	interrupt.default_soft_callback=callback;
 }
 
+void interrupt_set_fiq_callback(void (*callback)(void)) {
+
+	interrupt.fiq_callback=callback;
+}
+
 void interrupt_soft_clear(u8 src_number) {
 
 	VICSoftIntClr=(1<<src_number);
@@ -62,7 +69,7 @@ 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;
@@ -80,10 +87,10 @@ int interrupt_enable(u8 src_number,u8 mode,u8 priority,u32 callback_addr) {
 			VICIntSelect|=(1<<src_number);
 			break;
 		case INTERRUPT_MODE_VIRQ:
-			if(addr[priority]&0x3f)
+			if(addr[prio]&0x3f)
 				return INTERRUPT_PRIORITY_USED;
-			*((volatile u32 *)(addr+priority))=callback_addr;
-			*((volatile u32 *)(cntl+priority))=(src_number&0x1f)+0x20;
+			*((volatile u32 *)(addr+prio))=callback_addr;
+			*((volatile u32 *)(cntl+prio))=(src_number&0x1f)+0x20;
 		case INTERRUPT_MODE_IRQ:
 		default:
 			break;
@@ -115,6 +122,14 @@ int interrupt_change_callback(u8 src_number,u32 callback) {
 	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)
@@ -135,9 +150,69 @@ void interrupt_ext_ir_set(u8 eint) {
 	EXTINT=(1<<eint);
 }
 
-void interrupt_ack(void) {
+// timer counter interrupts
+void interrupt_tc_config(u8 tcnum,u8 mode,u8 cap,u32 psc) {
 
-	VICVectAddr=0;
+	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;
 }
 
 /*
@@ -169,5 +244,8 @@ void interrupt_handler_data_abort(void) {
 
 // fiq
 void interrupt_handler_fiq(void) {
+
+	if(interrupt.fiq_callback)
+		interrupt.fiq_callback();
 }
 
diff --git a/betty/interrupts.h b/betty/interrupts.h
index cfb7591..21d7413 100644
--- a/betty/interrupts.h
+++ b/betty/interrupts.h
@@ -50,6 +50,33 @@
 #define INTERRUPT_EXT2			2
 #define INTERRUPT_EXT3			3
 
+#define INTERRUPT_TC_MODE_T		0x00
+#define INTERRUPT_TC_MODE_CR		0x01
+#define INTERRUPT_TC_MODE_CF		0x02
+#define INTERRUPT_TC_MODE_CB		0x03
+
+#define INTERRUPT_TC_MATCH_IR		0x01
+#define INTERRUPT_TC_MATCH_RESET	0x02
+#define INTERRUPT_TC_MATCH_STOP		0x04
+
+#define INTERRUPT_TC_CAPT_R		0x01
+#define INTERRUPT_TC_CAPT_F		0x02
+#define INTERRUPT_TC_CAPT_I		0x04
+
+#define INTERRUPT_CAP0			0x00
+#define INTERRUPT_CAP1			0x01
+#define INTERRUPT_CAP2			0x02
+#define INTERRUPT_CAP3			0x03
+
+#define INTERRUPT_M0			0x01
+#define INTERRUPT_M1			0x02
+#define INTERRUPT_M2			0x04
+#define INTERRUPT_M3			0x08
+#define INTERRUPT_C0			0x10
+#define INTERRUPT_C1			0x20
+#define INTERRUPT_C2			0x40
+#define INTERRUPT_C3			0x80
+
 #define INTERRUPT_SET			0x00
 #define INTERRUPT_USED			0x01
 #define INTERRUPT_PRIORITY_USED		0x02
@@ -60,6 +87,7 @@
 
 typedef struct s_interrupt {
 	void (*default_soft_callback)(void);
+	void (*fiq_callback)(void);
 } t_interrupt;
 
 /* function prototypes */
@@ -67,15 +95,22 @@ typedef struct s_interrupt {
 void interrupt_init(void);
 void interrupt_set_default_callback(u32 callback_addr);
 void interrupt_set_soft_callback(void (*callback)(void));
+void interrupt_set_fiq_callback(void (*callback)(void));
 void interrupt_soft_clear(u8 src_number);
 void interrupt_clear(u8 src_number);
 void interrupt_soft_enable(u8 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);
 int interrupt_change_callback(u8 src_number,u32 callback_addr);
+
 void interrupt_ext_ir_config(u8 eint,u8 wakeup,u8 mode,u8 polarity);
 void interrupt_ext_ir_set(u8 eint);
 void interrupt_ack(void);
 
+void interrupt_tc_config(u8 tcnum,u8 mode,u8 cap,u32 psc);
+void interrupt_tc_match_config(u8 tcnum,u8 mnum,u32 val,u8 mode);
+void interrupt_tc_capt_config(u8 tcnum,u8 cnum,u8 mode);
+void interrupt_tc_ir_set(u8 tcnum,u8 tcmc);
+
 void interrupt_handler_reset(void);
 void interrupt_handler_undef_instruction(void);
 void interrupt_handler_soft_ir(void);
-- 
2.20.1