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