Lines Matching +full:irq +full:- +full:signals

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
26 #define LP_IRQ(minor)	lp_table[(minor)].dev->port->irq /* interrupt # */
33 #define LP_BASE(x)	lp_table[(x)].dev->port->base
69  * The following constants describe the various signals of the printer port
70  * hardware.  Note that the hardware inverts some signals and that some
71  * signals are active low.  An example is LP_STROBE, which must be programmed
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