dev/ppbus/ppb_1284.c

42 #include <sys/bus.h>
60 do_1284_wait(device_t bus, char mask, char status)
62 	return (ppb_poll_bus(bus, 4, mask, status, PPB_NOINTR | PPB_POLL));
66 do_peripheral_wait(device_t bus, char mask, char status)
68 	return (ppb_poll_bus(bus, 100, mask, status, PPB_NOINTR | PPB_POLL));
79 ppb_1284_reset_error(device_t bus, int state)
81 	struct ppb_data *ppb = DEVTOSOFTC(bus);
95 ppb_1284_get_state(device_t bus)
97 	struct ppb_data *ppb = DEVTOSOFTC(bus);
109 ppb_1284_set_state(device_t bus, int state)
111 	struct ppb_data *ppb = DEVTOSOFTC(bus);
126 ppb_1284_set_error(device_t bus, int error, int event)
128 	struct ppb_data *ppb = DEVTOSOFTC(bus);
139 		ppb_rstr(bus) & 0xff, event);
197 ppb_peripheral_negociate(device_t bus, int mode, int options)
202 	ppb_set_mode(bus, PPB_COMPATIBLE);
203 	ppb_1284_set_state(bus, PPB_PERIPHERAL_NEGOCIATION);
210 	while (spin-- && (ppb_rstr(bus) & nBUSY))
214 	if (!(ppb_rstr(bus) & SELECT) || !spin) {
220 	r = ppb_rdtr(bus);
227 		ppb_wctr(bus, (STROBE | nINIT) & ~(SELECTIN));
231 		ppb_wctr(bus, (nINIT) & ~(SELECTIN | STROBE));
237 			ppb_1284_set_error(bus, PPB_MODE_UNSUPPORTED, 4);
241 			ppb_1284_set_state(bus, PPB_PERIPHERAL_IDLE);
244 				ppb_set_mode(bus, PPB_BYTE);
256 		ppb_wctr(bus, SELECTIN);
260 		ppb_wctr(bus, (SELECTIN) & ~(STROBE | nINIT));
261 		ppb_1284_set_error(bus, PPB_MODE_UNSUPPORTED, 4);
273 	ppb_peripheral_terminate(bus, PPB_WAIT);
285 ppb_peripheral_terminate(device_t bus, int how)
293 	ppb_1284_set_state(bus, PPB_PERIPHERAL_TERMINATION);
296 	if ((error = do_peripheral_wait(bus, SELECT | nBUSY, 0))) {
297 		ppb_1284_set_error(bus, PPB_TIMEOUT, 22);
302 	ppb_wctr(bus, (nINIT | STROBE) & ~(AUTOFEED | SELECTIN));
305 	if ((error = do_peripheral_wait(bus, nBUSY, nBUSY))) {
306 		ppb_1284_set_error(bus, PPB_TIMEOUT, 25);
311 	ppb_wctr(bus, (SELECTIN | nINIT | STROBE) & ~(AUTOFEED));
314 	ppb_wctr(bus, (SELECTIN | nINIT) & ~(STROBE | AUTOFEED));
317 	if ((error = do_peripheral_wait(bus, nBUSY, 0))) {
318 		ppb_1284_set_error(bus, PPB_TIMEOUT, 28);
323 	ppb_set_mode(bus, PPB_COMPATIBLE);
324 	ppb_1284_set_state(bus, PPB_FORWARD_IDLE);
335 byte_peripheral_outbyte(device_t bus, char *buffer, int last)
340 	if ((error = do_1284_wait(bus, nBUSY, nBUSY))) {
341 		ppb_1284_set_error(bus, PPB_TIMEOUT, 7);
346 	if (!(ppb_rstr(bus) & SELECT)) {
347 		ppb_peripheral_terminate(bus, PPB_WAIT);
355 	ppb_wdtr(bus, *buffer);
358 	ppb_wctr(bus, (AUTOFEED | STROBE) & ~(nINIT | SELECTIN));
361 	if ((error = do_peripheral_wait(bus, nBUSY, 0))) {
362 		ppb_1284_set_error(bus, PPB_TIMEOUT, 16);
368 		ppb_wctr(bus, (AUTOFEED) & ~(nINIT | STROBE | SELECTIN));
370 		ppb_wctr(bus, (nINIT) & ~(STROBE | SELECTIN | AUTOFEED));
375 	if ((error = do_peripheral_wait(bus, nACK | nBUSY, 0))) {
376 		ppb_1284_set_error(bus, PPB_TIMEOUT, 16);
382 	if (!(ppb_rstr(bus) & SELECT)) {
383 		ppb_peripheral_terminate(bus, PPB_WAIT);
397 byte_peripheral_write(device_t bus, char *buffer, int len, int *sent)
402 	ppb_1284_set_state(bus, PPB_PERIPHERAL_TRANSFER);
411 		r = ppb_rctr(bus);
412 		ppb_wctr(bus, r & ~nINIT);
418 		error = ppb_poll_bus(bus, PPB_FOREVER, nBUSY, nBUSY,
427 		if ((error = byte_peripheral_outbyte(bus, buffer+i, (i == len-1))))
432 		ppb_1284_set_state(bus, PPB_PERIPHERAL_IDLE);
444 byte_1284_inbyte(device_t bus, char *buffer)
449 	ppb_wctr(bus, (PCD | nINIT | AUTOFEED) & ~(STROBE | SELECTIN));
452 	if ((error = do_1284_wait(bus, nACK, 0))) {
453 		ppb_1284_set_error(bus, PPB_TIMEOUT, 9);
458 	*buffer = ppb_rdtr(bus);
461 	ppb_wctr(bus, (nINIT) & ~(AUTOFEED | STROBE | SELECTIN));
464 	if ((error = do_1284_wait(bus, nACK, nACK))) {
465 		ppb_1284_set_error(bus, PPB_TIMEOUT, 11);
470 	ppb_wctr(bus, (nINIT | STROBE) & ~(AUTOFEED | SELECTIN));
472 	ppb_wctr(bus, (nINIT) & ~(AUTOFEED | STROBE | SELECTIN));
484 nibble_1284_inbyte(device_t bus, char *buffer)
492 		ppb_wctr(bus, (nINIT | AUTOFEED) & ~(STROBE | SELECTIN));
497 		if ((error = do_1284_wait(bus, nACK, 0))) {
498 			ppb_1284_set_error(bus, PPB_TIMEOUT, 9);
503 		nibble[i] = ppb_rstr(bus);
506 		ppb_wctr(bus, nINIT & ~(AUTOFEED | STROBE | SELECTIN));
509 		if ((error = do_1284_wait(bus, nACK, nACK))) {
510 			ppb_1284_set_error(bus, PPB_TIMEOUT, 11);
528 spp_1284_read(device_t bus, int mode, char *buffer, int max, int *read)
536 	state = ppb_1284_get_state(bus);
540 		if ((error = ppb_1284_negociate(bus, mode, 0)))
549 		ppb_1284_terminate(bus);
550 		if ((error = ppb_1284_negociate(bus, mode, 0)))
555 	while ((len < max) && !(ppb_rstr(bus) & (nFAULT))) {
557 		ppb_1284_set_state(bus, PPB_REVERSE_TRANSFER);
566 			if (nibble_1284_inbyte(bus, buffer+len))
570 			if (byte_1284_inbyte(bus, buffer+len))
582 		ppb_1284_set_state(bus, PPB_REVERSE_IDLE);
587 		ppb_1284_terminate(bus);
597 ppb_1284_read_id(device_t bus, int mode, char *buffer,
608 		if ((error = ppb_1284_negociate(bus, PPB_NIBBLE, PPB_REQUEST_ID)))
610 		error = spp_1284_read(bus, PPB_NIBBLE, buffer, max, read);
613 		if ((error = ppb_1284_negociate(bus, PPB_BYTE, PPB_REQUEST_ID)))
615 		error = spp_1284_read(bus, PPB_BYTE, buffer, max, read);
621 	ppb_1284_terminate(bus);
631 ppb_1284_read(device_t bus, int mode, char *buffer,
639 		error = spp_1284_read(bus, mode, buffer, max, read);
658 ppb_1284_negociate(device_t bus, int mode, int options)
667 	if (ppb_1284_get_state(bus) >= PPB_PERIPHERAL_NEGOCIATION)
668 		ppb_peripheral_terminate(bus, PPB_WAIT);
670 	if (ppb_1284_get_state(bus) != PPB_FORWARD_IDLE)
671 		ppb_1284_terminate(bus);
678 	ppb_set_mode(bus, PPB_COMPATIBLE);
681 	ppb_1284_reset_error(bus, PPB_FORWARD_IDLE);
687 	ppb_wctr(bus, (nINIT | SELECTIN) & ~(STROBE | AUTOFEED));
691 	ppb_1284_set_state(bus, PPB_NEGOCIATION);
694 	ppb_wdtr(bus, request_mode);
698 	ppb_wctr(bus, (nINIT | STROBE) & ~(AUTOFEED | SELECTIN));
700 	ppb_wctr(bus, (nINIT) & ~(STROBE | AUTOFEED | SELECTIN));
707 	ppb_wctr(bus, (nINIT | AUTOFEED) & ~(STROBE | SELECTIN));
712 	if (ppb_poll_bus(bus, 40, nACK | SELECT | nFAULT,
714 		ppb_1284_set_error(bus, PPB_NOT_IEEE1284, 2);
720 	if (do_1284_wait(bus, nACK | PERROR | SELECT | nFAULT,
722 		ppb_1284_set_error(bus, PPB_NOT_IEEE1284, 2);
729 	ppb_wctr(bus, (nINIT | STROBE | AUTOFEED) & ~SELECTIN);
733 	ppb_wctr(bus, nINIT & ~(SELECTIN | AUTOFEED | STROBE));
736 	if (do_1284_wait(bus, nACK, nACK)) {
737 		ppb_1284_set_error(bus, PPB_TIMEOUT, 6);
747 		ppb_1284_terminate(bus);
752 		if (do_1284_wait(bus, nACK | SELECT, nACK)) {
753 			ppb_1284_set_error(bus, PPB_MODE_UNSUPPORTED, 7);
758 		if (do_1284_wait(bus, nACK | SELECT, SELECT | nACK)) {
759 			ppb_1284_set_error(bus, PPB_MODE_UNSUPPORTED, 7);
769 		ppb_1284_set_state(bus, PPB_REVERSE_IDLE);
773 		ppb_1284_set_state(bus, PPB_SETUP);
774 		ppb_wctr(bus, (nINIT | AUTOFEED) & ~(SELECTIN | STROBE));
778 		if (do_1284_wait(bus, nACK | SELECT | nBUSY,
780 			ppb_1284_set_error(bus, PPB_TIMEOUT, 30);
785 		if (do_1284_wait(bus, nACK | SELECT | PERROR | nBUSY,
787 			ppb_1284_set_error(bus, PPB_TIMEOUT, 30);
794 		ppb_1284_set_state(bus, PPB_ECP_FORWARD_IDLE);
797 		ppb_1284_set_state(bus, PPB_EPP_IDLE);
803 	ppb_set_mode(bus, mode);
808 	ppb_1284_terminate(bus);
820 ppb_1284_terminate(device_t bus)
829 	ppb_1284_set_state(bus, PPB_TERMINATION);
833 	ppb_wctr(bus, (nINIT | STROBE | SELECTIN) & ~(AUTOFEED));
838 	ppb_wctr(bus, (nINIT | SELECTIN) & ~(STROBE | AUTOFEED));
841 	if (do_1284_wait(bus, nACK | nBUSY | nFAULT, nFAULT)) {
842 		ppb_1284_set_error(bus, PPB_TIMEOUT, 24);
847 	ppb_wctr(bus, (nINIT | SELECTIN | AUTOFEED) & ~STROBE);
852 	if (do_1284_wait(bus, nACK, nACK)) {
853 		ppb_1284_set_error(bus, PPB_TIMEOUT, 27);
857 	ppb_wctr(bus, (nINIT | SELECTIN) & ~(STROBE | AUTOFEED));
861 	ppb_set_mode(bus, PPB_COMPATIBLE);
862 	ppb_1284_set_state(bus, PPB_FORWARD_IDLE);