1 files changed, 0 insertions, 108 deletions
diff --git a/openpcd/firmware/src/os/fifo.c b/openpcd/firmware/src/os/fifo.c
deleted file mode 100644
index b0ec152..0000000
--- a/openpcd/firmware/src/os/fifo.c
+++ /dev/null
@@ -1,108 +0,0 @@
-/* Implementation of a virtual FIFO */
-
-#include "fifo.h"
-
-#include <errno.h>
-#include <string.h>
-
-#define FIFO_IRQ_LO	0x01
-#define FIFO_IRQ_HI	0x02
-#define FIFO_IRQ_OFLOW	0x04
-
-/* returns number of data bytes present in the fifo */
-int fifo_available(struct fifo *fifo)
-{
-	if (fifo->producer > fifo->consumer)
-		return fifo->producer - fifo->consumer;
-	else
-		return (fifo->size - fifo->consumer) + fifo->producer;
-}
-
-void fifo_check_water(struct fifo *fifo)
-{
-	int avail = fifo_available(fifo);
-
-	if (avail <= fifo->watermark)
-		fifo->irq |= FIFO_IRQ_LO;
-	else
-		fifo->irq &= FIFO_IRQ_LO;
-
-	if (fifo->size - avail >= fifo->watermark)
-		fifo->irq |= FIFO_IRQ_HI;
-	else
-		fifo->irq &= FIFO_IRQ_HI;
-}
-
-void fifo_check_raise_int(struct fifo *fifo)
-{
-	if (fifo->irq & fifo->irq_en)
-		fifo->callback(fifo, fifo->irq, fifo->cb_data);
-}
-
-
-u_int16_t fifo_data_put(struct fifo *fifo, u_int16_t len, u_int8_t *data)
-{
-	if (len > fifo_available(fifo)) {
-		len = fifo_available(fifo);
-		fifo->irq |= FIFO_IRQ_OFLOW;
-	}
-
-	if (len + fifo->producer <= fifo->size) {
-		/* easy case */
-		memcpy(&fifo->data[fifo->producer], data, len);
-		fifo->producer += len;
-	} else {
-		/* difficult: wrap around */
-		u_int16_t chunk_len;
-
-		chunk_len = fifo->size - fifo->producer;
-		memcpy(&fifo->data[fifo->producer], data, chunk_len);
-
-		memcpy(&fifo->data[0], data + chunk_len, len - chunk_len);
-		fifo->producer = len - chunk_len;
-	}
-
-	fifo_check_water(fifo);
-
-	return len;
-}
-
-
-u_int16_t fifo_data_get(struct fifo *fifo, u_int16_t len, u_int8_t *data)
-{
-	u_int16_t avail = fifo_available(fifo);
-
-	if (avail < len)
-		len = avail;
-
-	if (fifo->producer > fifo->consumer) {
-		/* easy case */
-		memcpy(data, &fifo->data[fifo->consumer], len);
-	} else {
-		/* difficult case: wrap */
-		u_int16_t chunk_len = fifo->size - fifo->consumer;
-		memcpy(data, &fifo->data[fifo->consumer], chunk_len);
-		memcpy(data+chunk_len, &fifo->data[0], len - chunk_len);
-	}
-
-	fifo_check_water(fifo);
-
-	return len;
-}
-
-int fifo_init(struct fifo *fifo, u_int16_t size, 
-	      void (*cb)(struct fifo *fifo, u_int8_t event, void *data), void *cb_data)
-{
-	if (size > sizeof(fifo->data))
-		return -EINVAL;
-
-	memset(fifo->data, 0, sizeof(fifo->data));
-	fifo->size = size;
-	fifo->producer = fifo->consumer = 0;
-	fifo->watermark = 0;
-	fifo->callback = cb;
-	fifo->cb_data = cb_data;
-
-	return 0;
-}
-