ReactOS 0.4.15-dev-8138-g1e75ea8
parallel.h
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1#pragma once
2
3/*
4 * usr/include/linux/lp.h c.1991-1992 James Wiegand
5 * many modifications copyright (C) 1992 Michael K. Johnson
6 * Interrupt support added 1993 Nigel Gamble
7 */
8
9/*
10 * Per POSIX guidelines, this module reserves the LP and lp prefixes
11 * These are the lp_table[minor].flags flags...
12 */
13#define LP_EXIST 0x0001
14#define LP_SELEC 0x0002
15#define LP_BUSY 0x0004
16#define LP_OFFL 0x0008
17#define LP_NOPA 0x0010
18#define LP_ERR 0x0020
19#define LP_ABORT 0x0040
20#define LP_CAREFUL 0x0080
21#define LP_ABORTOPEN 0x0100
22
23/* timeout for each character. This is relative to bus cycles -- it
24 * is the count in a busy loop. THIS IS THE VALUE TO CHANGE if you
25 * have extremely slow printing, or if the machine seems to slow down
26 * a lot when you print. If you have slow printing, increase this
27 * number and recompile, and if your system gets bogged down, decrease
28 * this number. This can be changed with the tunelp(8) command as well.
29 */
30
31#define LP_INIT_CHAR 1000
32
33/* The parallel port specs apparently say that there needs to be
34 * a .5usec wait before and after the strobe. Since there are wildly
35 * different computers running linux, I can't come up with a perfect
36 * value, but since it worked well on most printers before without,
37 * I'll initialize it to 0.
38 */
39
40#define LP_INIT_WAIT 0
41
42/* This is the amount of time that the driver waits for the printer to
43 * catch up when the printer's buffer appears to be filled. If you
44 * want to tune this and have a fast printer (i.e. HPIIIP), decrease
45 * this number, and if you have a slow printer, increase this number.
46 * This is in hundredths of a second, the default 2 being .05 second.
47 * Or use the tunelp(8) command, which is especially nice if you want
48 * change back and forth between character and graphics printing, which
49 * are wildly different...
50 */
51
52#define LP_INIT_TIME 2
53
54/* IOCTL numbers */
55#define LPCHAR 0x0601 /* corresponds to LP_INIT_CHAR */
56#define LPTIME 0x0602 /* corresponds to LP_INIT_TIME */
57#define LPABORT 0x0604 /* call with TRUE arg to abort on error,
58 FALSE to retry. Default is retry. */
59#define LPSETIRQ 0x0605 /* call with new IRQ number,
60 or 0 for polling (no IRQ) */
61#define LPGETIRQ 0x0606 /* get the current IRQ number */
62#define LPWAIT 0x0608 /* corresponds to LP_INIT_WAIT */
63#define LPCAREFUL 0x0609 /* call with TRUE arg to require out-of-paper, off-
64 line, and error indicators good on all writes,
65 FALSE to ignore them. Default is ignore. */
66#define LPABORTOPEN 0x060a /* call with TRUE arg to abort open() on error,
67 FALSE to ignore error. Default is ignore. */
68#define LPGETSTATUS 0x060b /* return LP_S(minor) */
69#define LPRESET 0x060c /* reset printer */
71/* timeout for printing a timeout, in jiffies (100ths of a second).
72 This is also used for re-checking error conditions if LP_ABORT is
73 not set. This is the default behavior. */
74
75#define LP_TIMEOUT_INTERRUPT (60 * HZ)
76#define LP_TIMEOUT_POLLED (10 * HZ)
77
78#if 0
79#define LP_B(minor) lp_table[(minor)].base /* IO address */
80#define LP_F(minor) lp_table[(minor)].flags /* flags for busy, etc. */
81#define LP_S(minor) inb_p(LP_B((minor)) + 1) /* status port */
82#define LP_C(minor) (lp_table[(minor)].base + 2) /* control port */
83#define LP_CHAR(minor) lp_table[(minor)].chars /* busy timeout */
84#define LP_TIME(minor) lp_table[(minor)].time /* wait time */
85#define LP_WAIT(minor) lp_table[(minor)].wait /* strobe wait */
86#define LP_IRQ(minor) lp_table[(minor)].irq /* interrupt # */
87 /* 0 means polled */
88#endif
89
90#define LP_BUFFER_SIZE 256
91
92
93/*
94 * The following constants describe the various signals of the printer port
95 * hardware. Note that the hardware inverts some signals and that some
96 * signals are active low. An example is LP_STROBE, which must be programmed
97 * with 1 for being active and 0 for being inactive, because the strobe signal
98 * gets inverted, but it is also active low.
99 */
100
102 * bit defines for 8255 status port
103 * base + 1
104 * accessed with LP_S(minor), which gets the byte...
105 */
106#define LP_PBUSY 0x80 /* inverted input, active high */
107#define LP_PACK 0x40 /* unchanged input, active low */
108#define LP_POUTPA 0x20 /* unchanged input, active high */
109#define LP_PSELECD 0x10 /* unchanged input, active high */
110#define LP_PERRORP 0x08 /* unchanged input, active low */
111
113 * defines for 8255 control port
114 * base + 2
115 * accessed with LP_C(minor)
116 */
117#define LP_PINTEN 0x10
118#define LP_PSELECP 0x08 /* inverted output, active low */
119#define LP_PINITP 0x04 /* unchanged output, active low */
120#define LP_PAUTOLF 0x02 /* inverted output, active low */
121#define LP_PSTROBE 0x01 /* inverted output, active low */
122
124 * the value written to ports to test existence. PC-style ports will
125 * return the value written. AT-style ports will return 0. so why not
126 * make them the same ?
127 */
128#define LP_DUMMY 0x00
130/*
131 * This is the port delay time. Your mileage may vary.
132 * It is used only in the lp_init() routine.
133 */
134#define LP_DELAY 150000