224 static int fifo_empty(struct cyapa_softc *sc, struct cyapa_fifo *fifo);
225 static size_t fifo_ready(struct cyapa_softc *sc, struct cyapa_fifo *fifo);
226 static char *fifo_read(struct cyapa_softc *sc, struct cyapa_fifo *fifo,
228 static char *fifo_write(struct cyapa_softc *sc, struct cyapa_fifo *fifo,
231     struct cyapa_fifo *fifo);
232 static void fifo_write_char(struct cyapa_softc *sc, struct cyapa_fifo *fifo,
234 static size_t fifo_space(struct cyapa_softc *sc, struct cyapa_fifo *fifo);
235 static void fifo_reset(struct cyapa_softc *sc, struct cyapa_fifo *fifo);
1670 fifo_empty(struct cyapa_softc *sc, struct cyapa_fifo *fifo)  in fifo_empty()  argument
1675 	return (fifo->rindex == fifo->windex);  in fifo_empty()
1683 fifo_ready(struct cyapa_softc *sc, struct cyapa_fifo *fifo)  in fifo_ready()  argument
1689 	n = CYAPA_BUFSIZE - (fifo->rindex & CYAPA_BUFMASK);  in fifo_ready()
1690 	if (n > (size_t)(fifo->windex - fifo->rindex))  in fifo_ready()
1691 		n = (size_t)(fifo->windex - fifo->rindex);  in fifo_ready()
1703 fifo_read(struct cyapa_softc *sc, struct cyapa_fifo *fifo, size_t n)  in fifo_read()  argument
1708 	if (n > (CYAPA_BUFSIZE - (fifo->rindex & CYAPA_BUFMASK))) {  in fifo_read()
1710 		return (fifo->buf);  in fifo_read()
1712 	ptr = fifo->buf + (fifo->rindex & CYAPA_BUFMASK);  in fifo_read()
1713 	fifo->rindex += n;  in fifo_read()
1719 fifo_read_char(struct cyapa_softc *sc, struct cyapa_fifo *fifo)  in fifo_read_char()  argument
1725 	if (fifo->rindex == fifo->windex) {  in fifo_read_char()
1729 		c = fifo->buf[fifo->rindex & CYAPA_BUFMASK];  in fifo_read_char()
1730 		++fifo->rindex;  in fifo_read_char()
1741 fifo_write_char(struct cyapa_softc *sc, struct cyapa_fifo *fifo, uint8_t c)  in fifo_write_char()  argument
1746 	if (fifo->windex - fifo->rindex < CYAPA_BUFSIZE) {  in fifo_write_char()
1747 		fifo->buf[fifo->windex & CYAPA_BUFMASK] = c;  in fifo_write_char()
1748 		++fifo->windex;  in fifo_write_char()
1757 fifo_space(struct cyapa_softc *sc, struct cyapa_fifo *fifo)  in fifo_space()  argument
1763 	n = CYAPA_BUFSIZE - (fifo->windex & CYAPA_BUFMASK);  in fifo_space()
1764 	if (n > (size_t)(CYAPA_BUFSIZE - (fifo->windex - fifo->rindex)))  in fifo_space()
1765 		n = (size_t)(CYAPA_BUFSIZE - (fifo->windex - fifo->rindex));  in fifo_space()
1770 fifo_write(struct cyapa_softc *sc, struct cyapa_fifo *fifo, size_t n)  in fifo_write()  argument
1776 	ptr = fifo->buf + (fifo->windex & CYAPA_BUFMASK);  in fifo_write()
1777 	fifo->windex += n;  in fifo_write()
1783 fifo_reset(struct cyapa_softc *sc, struct cyapa_fifo *fifo)  in fifo_reset()  argument
1788 	fifo->rindex = 0;  in fifo_reset()
1789 	fifo->windex = 0;  in fifo_reset()