keyboard: stub

src/sys/keyboard.c

@@ -0,0 +1,67 @@
+#include <kernel/keyboard.h>
+#include <arch/panic.h>
+#include <arch/interrupt.h>
+
+#define MAX_KEYBOARD_COUNT 32
+
+static uint32_t kblist;
+static keyboard_t keyboards[MAX_KEYBOARD_COUNT];
+
+void keyboard_packet(int kb, kbpacket_t packet){
+	ringbuffer_write(&keyboards[kb].buffer, &packet, sizeof(kbpacket_t));
+	event_signal(&keyboards[kb].event, false);
+}
+
+int keyboard_getandwait(int kb, kbpacket_t* buff){
+	for(;;){
+		
+		arch_interrupt_disable();
+
+		size_t readc = ringbuffer_read(&keyboards[kb].buffer, buff, sizeof(kbpacket_t));
+
+		arch_interrupt_enable();
+
+		if(readc)
+			return 0;
+
+		// interruptible wait
+
+		int ret = event_wait(&keyboards[kb].event, true);
+		if(ret)
+			return ret;
+	}
+}
+
+int keyboard_get(int kb, kbpacket_t* buff){
+	
+	arch_interrupt_disable();
+
+	int readc = ringbuffer_read(&keyboards[kb].buffer, buff, sizeof(kbpacket_t));
+
+	arch_interrupt_enable();
+
+	return readc == 0;
+
+}
+
+int keyboard_getnew(){
+	
+	for(size_t i = 0; i < MAX_KEYBOARD_COUNT; ++i){
+		if((kblist & (1 << i)) == 0){
+			kblist |= 1 << i;
+			return i;
+		}
+	}
+
+	return -1;
+
+}
+
+void keyboard_init(){
+
+	for(size_t i = 0; i < MAX_KEYBOARD_COUNT; ++i){
+		if(ringbuffer_init(&keyboards[i].buffer, sizeof(kbpacket_t)*50))
+			_panic("Out of memory", NULL);
+	}
+
+}