linux-headers (unknown)
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 _LINUX_LP_H
9 #define _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 /* _LINUX_LP_H */
Browse
Usage
Versions