36 static void parport_ieee1284_wakeup (struct parport *port)  in parport_ieee1284_wakeup()  argument
38 	up (&port->physport->ieee1284.irq);  in parport_ieee1284_wakeup()
43 	struct parport *port = from_timer(port, t, timer);  in timeout_waiting_on_port()  local
45 	parport_ieee1284_wakeup (port);  in timeout_waiting_on_port()
64 int parport_wait_event (struct parport *port, signed long timeout)  in parport_wait_event()  argument
68 	if (!port->physport->cad->timeout)  in parport_wait_event()
73 	timer_setup(&port->timer, timeout_waiting_on_port, 0);  in parport_wait_event()
74 	mod_timer(&port->timer, jiffies + timeout);  in parport_wait_event()
75 	ret = down_interruptible (&port->physport->ieee1284.irq);  in parport_wait_event()
76 	if (!del_timer_sync(&port->timer) && !ret)  in parport_wait_event()
107 int parport_poll_peripheral(struct parport *port,  in parport_poll_peripheral()  argument
117 		status = parport_read_status (port);  in parport_poll_peripheral()
156 int parport_wait_peripheral(struct parport *port,  in parport_wait_peripheral()  argument
165 	usec = port->physport->spintime; /* usecs of fast polling */  in parport_wait_peripheral()
166 	if (!port->physport->cad->timeout)  in parport_wait_peripheral()
177 	ret = parport_poll_peripheral (port, mask, result, usec);  in parport_wait_peripheral()
181 	if (!port->physport->cad->timeout)  in parport_wait_peripheral()
194 		if ((ret = parport_wait_event (port, msecs_to_jiffies(10))) < 0)  in parport_wait_peripheral()
197 		status = parport_read_status (port);  in parport_wait_peripheral()
214 static void parport_ieee1284_terminate (struct parport *port)  in parport_ieee1284_terminate()  argument
217 	port = port->physport;  in parport_ieee1284_terminate()
220 	switch (port->ieee1284.mode) {  in parport_ieee1284_terminate()
227 		parport_frob_control (port, PARPORT_CONTROL_INIT, 0);  in parport_ieee1284_terminate()
231 		parport_frob_control (port,  in parport_ieee1284_terminate()
242 		if (port->ieee1284.phase != IEEE1284_PH_FWD_IDLE) {  in parport_ieee1284_terminate()
244 			parport_frob_control (port,  in parport_ieee1284_terminate()
251 			r = parport_wait_peripheral (port,  in parport_ieee1284_terminate()
256 					 port->name);  in parport_ieee1284_terminate()
258 			parport_data_forward (port);  in parport_ieee1284_terminate()
259 			pr_debug("%s: ECP direction: forward\n", port->name);  in parport_ieee1284_terminate()
260 			port->ieee1284.phase = IEEE1284_PH_FWD_IDLE;  in parport_ieee1284_terminate()
269 		parport_frob_control (port,  in parport_ieee1284_terminate()
275 		r = parport_wait_peripheral (port, PARPORT_STATUS_ACK, 0);  in parport_ieee1284_terminate()
277 			pr_debug("%s: Timeout at event 24\n", port->name);  in parport_ieee1284_terminate()
280 		parport_frob_control (port,  in parport_ieee1284_terminate()
285 		r = parport_wait_peripheral (port,  in parport_ieee1284_terminate()
289 			pr_debug("%s: Timeout at event 27\n", port->name);  in parport_ieee1284_terminate()
292 		parport_frob_control (port, PARPORT_CONTROL_AUTOFD, 0);  in parport_ieee1284_terminate()
295 	port->ieee1284.mode = IEEE1284_MODE_COMPAT;  in parport_ieee1284_terminate()
296 	port->ieee1284.phase = IEEE1284_PH_FWD_IDLE;  in parport_ieee1284_terminate()
298 	pr_debug("%s: In compatibility (forward idle) mode\n", port->name);  in parport_ieee1284_terminate()
317 int parport_negotiate (struct parport *port, int mode)  in parport_negotiate()  argument
329 	port = port->physport;  in parport_negotiate()
332 	if (port->ieee1284.mode == mode)  in parport_negotiate()
336 	if ((port->ieee1284.mode & ~IEEE1284_ADDR) == (mode & ~IEEE1284_ADDR)){  in parport_negotiate()
337 		port->ieee1284.mode = mode;  in parport_negotiate()
342 	if (port->ieee1284.mode != IEEE1284_MODE_COMPAT)  in parport_negotiate()
343 		parport_ieee1284_terminate (port);  in parport_negotiate()
364 	port->ieee1284.phase = IEEE1284_PH_NEGOTIATION;  in parport_negotiate()
367 	parport_frob_control (port,  in parport_negotiate()
375 	parport_data_forward (port);  in parport_negotiate()
376 	parport_write_data (port, m);  in parport_negotiate()
380 	parport_frob_control (port,  in parport_negotiate()
386 	if (parport_wait_peripheral (port,  in parport_negotiate()
395 		parport_frob_control (port,  in parport_negotiate()
400 			 port->name, parport_read_status (port));  in parport_negotiate()
401 		port->ieee1284.phase = IEEE1284_PH_FWD_IDLE;  in parport_negotiate()
406 	parport_frob_control (port,  in parport_negotiate()
412 	parport_frob_control (port,  in parport_negotiate()
418 	if (parport_wait_peripheral (port,  in parport_negotiate()
423 			 port->name, mode, port->ops->read_status (port));  in parport_negotiate()
424 		parport_ieee1284_terminate (port);  in parport_negotiate()
428 	xflag = parport_read_status (port) & PARPORT_STATUS_SELECT;  in parport_negotiate()
434 			 port->name, mode);  in parport_negotiate()
435 		parport_ieee1284_terminate (port);  in parport_negotiate()
443 		parport_write_data (port, m);  in parport_negotiate()
447 		parport_frob_control (port,  in parport_negotiate()
452 		if (parport_wait_peripheral (port, PARPORT_STATUS_ACK, 0)) {  in parport_negotiate()
454 			pr_debug("%s: Event 52 didn't happen\n", port->name);  in parport_negotiate()
455 			parport_ieee1284_terminate (port);  in parport_negotiate()
460 		parport_frob_control (port,  in parport_negotiate()
465 		if (parport_wait_peripheral (port,  in parport_negotiate()
471 				 port->name, mode,  in parport_negotiate()
472 				 port->ops->read_status(port));  in parport_negotiate()
473 			parport_ieee1284_terminate (port);  in parport_negotiate()
478 		xflag = parport_read_status (port) & PARPORT_STATUS_SELECT;  in parport_negotiate()
484 				 port->name, mode);  in parport_negotiate()
485 			parport_ieee1284_terminate (port);  in parport_negotiate()
493 	pr_debug("%s: In mode 0x%02x\n", port->name, mode);  in parport_negotiate()
494 	port->ieee1284.mode = mode;  in parport_negotiate()
498 		port->ieee1284.phase = IEEE1284_PH_ECP_SETUP;  in parport_negotiate()
501 		parport_frob_control (port,  in parport_negotiate()
506 		r = parport_wait_peripheral (port,  in parport_negotiate()
510 			pr_debug("%s: Timeout at event 31\n", port->name);  in parport_negotiate()
513 		port->ieee1284.phase = IEEE1284_PH_FWD_IDLE;  in parport_negotiate()
514 		pr_debug("%s: ECP direction: forward\n", port->name);  in parport_negotiate()
518 		port->ieee1284.phase = IEEE1284_PH_REV_IDLE;  in parport_negotiate()
521 		port->ieee1284.phase = IEEE1284_PH_FWD_IDLE;  in parport_negotiate()
536 static int parport_ieee1284_ack_data_avail (struct parport *port)  in parport_ieee1284_ack_data_avail()  argument
538 	if (parport_read_status (port) & PARPORT_STATUS_ERROR)  in parport_ieee1284_ack_data_avail()
543 	port->ops->frob_control (port, PARPORT_CONTROL_AUTOFD, 0);  in parport_ieee1284_ack_data_avail()
544 	port->ieee1284.phase = IEEE1284_PH_HBUSY_DAVAIL;  in parport_ieee1284_ack_data_avail()
552 	struct parport *port = handle;  in parport_ieee1284_interrupt()  local
553 	parport_ieee1284_wakeup (port);  in parport_ieee1284_interrupt()
556 	if (port->ieee1284.phase == IEEE1284_PH_REV_IDLE) {  in parport_ieee1284_interrupt()
559 		pr_debug("%s: Data available\n", port->name);  in parport_ieee1284_interrupt()
560 		parport_ieee1284_ack_data_avail (port);  in parport_ieee1284_interrupt()
583 ssize_t parport_write (struct parport *port, const void *buffer, size_t len)  in parport_write()  argument
586 	return port->ops->compat_write_data (port, buffer, len, 0);  in parport_write()
589 	int mode = port->ieee1284.mode;  in parport_write()
600 		parport_negotiate (port, IEEE1284_MODE_COMPAT);  in parport_write()
603 		pr_debug("%s: Using compatibility mode\n", port->name);  in parport_write()
604 		fn = port->ops->compat_write_data;  in parport_write()
608 		pr_debug("%s: Using EPP mode\n", port->name);  in parport_write()
610 			fn = port->ops->epp_write_addr;  in parport_write()
612 			fn = port->ops->epp_write_data;  in parport_write()
616 		pr_debug("%s: Using software-emulated EPP mode\n", port->name);  in parport_write()
625 		pr_debug("%s: Using ECP mode\n", port->name);  in parport_write()
627 			fn = port->ops->ecp_write_addr;  in parport_write()
629 			fn = port->ops->ecp_write_data;  in parport_write()
634 		pr_debug("%s: Using software-emulated ECP mode\n", port->name);  in parport_write()
646 			 port->name, port->ieee1284.mode);  in parport_write()
650 	retval = (*fn) (port, buffer, len, 0);  in parport_write()
651 	pr_debug("%s: wrote %zd/%zu bytes\n", port->name, retval, len);  in parport_write()
674 ssize_t parport_read (struct parport *port, void *buffer, size_t len)  in parport_read()  argument
680 	int mode = port->physport->ieee1284.mode;  in parport_read()
695 		if ((port->physport->modes & PARPORT_MODE_TRISTATE) &&  in parport_read()
696 		    !parport_negotiate (port, IEEE1284_MODE_BYTE)) {  in parport_read()
698 			pr_debug("%s: Using byte mode\n", port->name);  in parport_read()
699 			fn = port->ops->byte_read_data;  in parport_read()
702 		if (parport_negotiate (port, IEEE1284_MODE_NIBBLE)) {  in parport_read()
707 		pr_debug("%s: Using nibble mode\n", port->name);  in parport_read()
708 		fn = port->ops->nibble_read_data;  in parport_read()
712 		pr_debug("%s: Using byte mode\n", port->name);  in parport_read()
713 		fn = port->ops->byte_read_data;  in parport_read()
717 		pr_debug("%s: Using EPP mode\n", port->name);  in parport_read()
719 			fn = port->ops->epp_read_addr;  in parport_read()
721 			fn = port->ops->epp_read_data;  in parport_read()
725 		pr_debug("%s: Using software-emulated EPP mode\n", port->name);  in parport_read()
734 		pr_debug("%s: Using ECP mode\n", port->name);  in parport_read()
735 		fn = port->ops->ecp_read_data;  in parport_read()
739 		pr_debug("%s: Using software-emulated ECP mode\n", port->name);  in parport_read()
745 			 port->name, port->physport->ieee1284.mode);  in parport_read()
749 	return (*fn) (port, buffer, len, 0);  in parport_read()
775 	if (dev->port->physport->cad == dev)  in parport_set_timeout()
776 		parport_ieee1284_wakeup (dev->port);  in parport_set_timeout()