1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2/*
3 * usr/include/linux/lp.h c.1991-1992 James Wiegand
4 * many modifications copyright (C) 1992 Michael K. Johnson
5 * Interrupt support added 1993 Nigel Gamble
6 * Removed 8255 status defines from inside __KERNEL__ Marcelo Tosatti
7 */
8#ifndef _UAPI_LINUX_LP_H
9#define _UAPI_LINUX_LP_H
10
11#include <linux/types.h>
12#include <linux/ioctl.h>
13
14/*
15 * Per POSIX guidelines, this module reserves the LP and lp prefixes
16 * These are the lp_table[minor].flags flags...
17 */
18#define LP_EXIST 0x0001
19#define LP_SELEC 0x0002
20#define LP_BUSY 0x0004
21#define LP_BUSY_BIT_POS 2
22#define LP_OFFL 0x0008
23#define LP_NOPA 0x0010
24#define LP_ERR 0x0020
25#define LP_ABORT 0x0040
26#define LP_CAREFUL 0x0080 /* obsoleted -arca */
27#define LP_ABORTOPEN 0x0100
28
29#define LP_TRUST_IRQ_ 0x0200 /* obsolete */
30#define LP_NO_REVERSE 0x0400 /* No reverse mode available. */
31#define LP_DATA_AVAIL 0x0800 /* Data is available. */
32
33/*
34 * bit defines for 8255 status port
35 * base + 1
36 * accessed with LP_S(minor), which gets the byte...
37 */
38#define LP_PBUSY 0x80 /* inverted input, active high */
39#define LP_PACK 0x40 /* unchanged input, active low */
40#define LP_POUTPA 0x20 /* unchanged input, active high */
41#define LP_PSELECD 0x10 /* unchanged input, active high */
42#define LP_PERRORP 0x08 /* unchanged input, active low */
43
44/* timeout for each character. This is relative to bus cycles -- it
45 * is the count in a busy loop. THIS IS THE VALUE TO CHANGE if you
46 * have extremely slow printing, or if the machine seems to slow down
47 * a lot when you print. If you have slow printing, increase this
48 * number and recompile, and if your system gets bogged down, decrease
49 * this number. This can be changed with the tunelp(8) command as well.
50 */
51
52#define LP_INIT_CHAR 1000
53
54/* The parallel port specs apparently say that there needs to be
55 * a .5usec wait before and after the strobe.
56 */
57
58#define LP_INIT_WAIT 1
59
60/* This is the amount of time that the driver waits for the printer to
61 * catch up when the printer's buffer appears to be filled. If you
62 * want to tune this and have a fast printer (i.e. HPIIIP), decrease
63 * this number, and if you have a slow printer, increase this number.
64 * This is in hundredths of a second, the default 2 being .05 second.
65 * Or use the tunelp(8) command, which is especially nice if you want
66 * change back and forth between character and graphics printing, which
67 * are wildly different...
68 */
69
70#define LP_INIT_TIME 2
71
72/* IOCTL numbers */
73#define LPCHAR 0x0601 /* corresponds to LP_INIT_CHAR */
74#define LPTIME 0x0602 /* corresponds to LP_INIT_TIME */
75#define LPABORT 0x0604 /* call with TRUE arg to abort on error,
76 FALSE to retry. Default is retry. */
77#define LPSETIRQ 0x0605 /* call with new IRQ number,
78 or 0 for polling (no IRQ) */
79#define LPGETIRQ 0x0606 /* get the current IRQ number */
80#define LPWAIT 0x0608 /* corresponds to LP_INIT_WAIT */
81/* NOTE: LPCAREFUL is obsoleted and it' s always the default right now -arca */
82#define LPCAREFUL 0x0609 /* call with TRUE arg to require out-of-paper, off-
83 line, and error indicators good on all writes,
84 FALSE to ignore them. Default is ignore. */
85#define LPABORTOPEN 0x060a /* call with TRUE arg to abort open() on error,
86 FALSE to ignore error. Default is ignore. */
87#define LPGETSTATUS 0x060b /* return LP_S(minor) */
88#define LPRESET 0x060c /* reset printer */
89#ifdef LP_STATS
90#define LPGETSTATS 0x060d /* get statistics (struct lp_stats) */
91#endif
92#define LPGETFLAGS 0x060e /* get status flags */
93#define LPSETTIMEOUT_OLD 0x060f /* set parport timeout */
94#define LPSETTIMEOUT_NEW \
95 _IOW(0x6, 0xf, __s64[2]) /* set parport timeout */
96#if __BITS_PER_LONG == 64
97#define LPSETTIMEOUT LPSETTIMEOUT_OLD
98#else
99#define LPSETTIMEOUT (sizeof(time_t) > sizeof(__kernel_long_t) ? \
100 LPSETTIMEOUT_NEW : LPSETTIMEOUT_OLD)
101#endif
102
103/* timeout for printk'ing a timeout, in jiffies (100ths of a second).
104 This is also used for re-checking error conditions if LP_ABORT is
105 not set. This is the default behavior. */
106
107#define LP_TIMEOUT_INTERRUPT (60 * HZ)
108#define LP_TIMEOUT_POLLED (10 * HZ)
109
110
111#endif /* _UAPI_LINUX_LP_H */
112