dev/pbio/pbio.c

69 /* Per-port buffer size */
75 /* I/O port range */
100  * Data specific to each I/O port
103 	struct cdev *port;
108 	char	buff[PBIO_BUFSIZ];	/* Per-port data buffer */
115 	struct portdata pd[PBIO_NPORTS];/* Per port data */
116 	int	iomode;			/* Virtualized I/O mode port value */
117 					/* The real port is write-only */
241 		sc->pd[i].port = make_dev(&pbio_cdevsw, (unit << 2) + i, 0, 0,
251 	int port, unit;
254 	port = PORT(dev);
260 		scp->pd[port].diff = *(int *)data;
263 		scp->pd[port].ipace = *(int *)data;
266 		scp->pd[port].opace = *(int *)data;
269 		*(int *)data = scp->pd[port].diff;
272 		*(int *)data = scp->pd[port].ipace;
275 		*(int *)data = scp->pd[port].opace;
287 	int ocfg, port, unit;
291 	port = PORT(dev);
296 	switch (port) {
332  * Return the value of a given port on a given I/O base address
333  * Handles the split C port nibbles and blocking
336 portval(int port, struct pbio_softc *scp, char *val)
341 		switch (port) {
358 		if (scp->pd[port].diff) {
359 			if (*val != scp->pd[port].oldval) {
360 				scp->pd[port].oldval = *val;
363 			err = tsleep((caddr_t)&(scp->pd[port].diff), PBIOPRI,
364 				     "pbiopl", max(1, scp->pd[port].ipace));
376 	int err, i, port, ret, toread, unit;
380 	port = PORT(dev);
387 		if ((ret = uiomove(scp->pd[port].buff, toread, uio)) != 0)
390 			if ((err = portval(port, scp, &val)) != 0)
392 			scp->pd[port].buff[i] = val;
393 			if (!scp->pd[port].diff && scp->pd[port].ipace)
394 				tsleep((caddr_t)&(scp->pd[port].ipace), PBIOPRI,
395 					"pbioip", scp->pd[port].ipace);
405 	int i, port, ret, towrite, unit;
409 	port = PORT(dev);
416 		if ((ret = uiomove(scp->pd[port].buff, towrite, uio)) != 0)
419 			val = scp->pd[port].buff[i];
420 			switch (port) {
440 			if (scp->pd[port].opace)
441 				tsleep((caddr_t)&(scp->pd[port].opace),
443 					scp->pd[port].opace);