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