213 /* Terminate a negotiated mode. */
220 	switch (port->ieee1284.mode) {  in parport_ieee1284_terminate()
224 		/* Terminate from EPP mode. */  in parport_ieee1284_terminate()
295 	port->ieee1284.mode = IEEE1284_MODE_COMPAT;  in parport_ieee1284_terminate()
298 	pr_debug("%s: In compatibility (forward idle) mode\n", port->name);  in parport_ieee1284_terminate()
303  *	parport_negotiate - negotiate an IEEE 1284 mode
305  *	@mode: mode to negotiate to
307  *	Use this to negotiate to a particular IEEE 1284 transfer mode.
308  *	The @mode parameter should be one of the constants in
312  *	negotiation to the mode specified, -1 if the peripheral is not
317 int parport_negotiate (struct parport *port, int mode)  in parport_negotiate()  argument
320 	if (mode == IEEE1284_MODE_COMPAT)  in parport_negotiate()
325 	int m = mode & ~IEEE1284_ADDR;  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()
341 	/* Go to compatibility forward idle mode */  in parport_negotiate()
342 	if (port->ieee1284.mode != IEEE1284_MODE_COMPAT)  in parport_negotiate()
345 	if (mode == IEEE1284_MODE_COMPAT)  in parport_negotiate()
346 		/* Compatibility mode: no negotiation. */  in parport_negotiate()
349 	switch (mode) {  in parport_negotiate()
361 	if (mode & IEEE1284_EXT_LINK)  in parport_negotiate()
422 		pr_debug("%s: Mode 0x%02x not supported? (0x%02x)\n",  in parport_negotiate()
423 			 port->name, mode, port->ops->read_status (port));  in parport_negotiate()
431 	if (mode && !xflag) {  in parport_negotiate()
432 		/* Mode not supported. */  in parport_negotiate()
433 		pr_debug("%s: Mode 0x%02x rejected by peripheral\n",  in parport_negotiate()
434 			 port->name, mode);  in parport_negotiate()
440 	if (mode & IEEE1284_EXT_LINK) {  in parport_negotiate()
441 		m = mode & 0x7f;  in parport_negotiate()
470 			pr_debug("%s: Mode 0x%02x not supported? (0x%02x)\n",  in parport_negotiate()
471 				 port->name, mode,  in parport_negotiate()
482 			/* Extended mode not supported. */  in parport_negotiate()
483 			pr_debug("%s: Extended mode 0x%02x not supported\n",  in parport_negotiate()
484 				 port->name, mode);  in parport_negotiate()
492 	/* Mode is supported */  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()
497 	if (!(mode & IEEE1284_EXT_LINK) && (m & IEEE1284_MODE_ECP)) {  in parport_negotiate()
515 	} else switch (mode) {  in parport_negotiate()
572  *	specified, using the IEEE 1284 transfer mode most recently
574  *	mode supports forward transfers (host to peripheral).
589 	int mode = port->ieee1284.mode;  in parport_write()
590 	int addr = mode & IEEE1284_ADDR;  in parport_write()
594 	mode &= ~(IEEE1284_DEVICEID | IEEE1284_ADDR);  in parport_write()
596 	/* Use the mode we're in. */  in parport_write()
597 	switch (mode) {  in parport_write()
603 		pr_debug("%s: Using compatibility mode\n", port->name);  in parport_write()
608 		pr_debug("%s: Using EPP mode\n", port->name);  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()
634 		pr_debug("%s: Using software-emulated ECP mode\n", port->name);  in parport_write()
645 		pr_debug("%s: Unknown mode 0x%02x\n",  in parport_write()
646 			 port->name, port->ieee1284.mode);  in parport_write()
663  *	specified, using the IEEE 1284 transfer mode most recently
665  *	mode supports reverse transfers (peripheral to host).
680 	int mode = port->physport->ieee1284.mode;  in parport_read()
681 	int addr = mode & IEEE1284_ADDR;  in parport_read()
685 	mode &= ~(IEEE1284_DEVICEID | IEEE1284_ADDR);  in parport_read()
687 	/* Use the mode we're in. */  in parport_read()
688 	switch (mode) {  in parport_read()
690 		/* if we can tri-state use BYTE mode instead of NIBBLE mode,  in parport_read()
691 		 * if that fails, revert to NIBBLE mode -- ought to store somewhere  in parport_read()
692 		 * the device's ability to do BYTE mode reverse transfers, so we don't  in parport_read()
697 			/* got into BYTE mode OK */  in parport_read()
698 			pr_debug("%s: Using byte mode\n", port->name);  in parport_read()
707 		pr_debug("%s: Using nibble mode\n", port->name);  in parport_read()
712 		pr_debug("%s: Using byte mode\n", port->name);  in parport_read()
717 		pr_debug("%s: Using EPP mode\n", port->name);  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()
739 		pr_debug("%s: Using software-emulated ECP mode\n", port->name);  in parport_read()
744 		pr_debug("%s: Unknown mode 0x%02x\n",  in parport_read()
745 			 port->name, port->physport->ieee1284.mode);  in parport_read()