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