include/linux/lp.h

1 /* SPDX-License-Identifier: GPL-2.0 */
3  * usr/include/linux/lp.h c.1991-1992 James Wiegand
16 /* Magic numbers for defining port-device mappings */
17 #define LP_PARPORT_UNSPEC -4
18 #define LP_PARPORT_AUTO -3
19 #define LP_PARPORT_OFF -2
20 #define LP_PARPORT_NONE -1
25 #define LP_WAIT(minor)	lp_table[(minor)].wait		/* strobe wait */
26 #define LP_IRQ(minor)	lp_table[(minor)].dev->port->irq /* interrupt # */
33 #define LP_BASE(x)	lp_table[(x)].dev->port->base
72  * with 1 for being active and 0 for being inactive, because the strobe signal
82 #define LP_PINTEN	0x10  /* high to read data in or-ed with data out */
89  * the value written to ports to test existence. PC-style ports will
90  * return the value written. AT-style ports will return 0. so why not
96  * This is the port delay time, in microseconds.