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serginhofr |
/*
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* usr/include/linux/lp.h c.1991-1992 James Wiegand
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* many modifications copyright (C) 1992 Michael K. Johnson
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* Interrupt support added 1993 Nigel Gamble
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* Removed 8255 status defines from inside __KERNEL__ Marcelo Tosatti
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*/
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#ifndef _LINUX_LP_H
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#define _LINUX_LP_H
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/*
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* Per POSIX guidelines, this module reserves the LP and lp prefixes
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* These are the lp_table[minor].flags flags...
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*/
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#define LP_EXIST 0x0001
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#define LP_SELEC 0x0002
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#define LP_BUSY 0x0004
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#define LP_BUSY_BIT_POS 2
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#define LP_OFFL 0x0008
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#define LP_NOPA 0x0010
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#define LP_ERR 0x0020
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#define LP_ABORT 0x0040
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#define LP_CAREFUL 0x0080 /* obsoleted -arca */
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#define LP_ABORTOPEN 0x0100
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#define LP_TRUST_IRQ_ 0x0200 /* obsolete */
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#define LP_NO_REVERSE 0x0400 /* No reverse mode available. */
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#define LP_DATA_AVAIL 0x0800 /* Data is available. */
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/*
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* bit defines for 8255 status port
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* base + 1
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* accessed with LP_S(minor), which gets the byte...
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*/
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#define LP_PBUSY 0x80 /* inverted input, active high */
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#define LP_PACK 0x40 /* unchanged input, active low */
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#define LP_POUTPA 0x20 /* unchanged input, active high */
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#define LP_PSELECD 0x10 /* unchanged input, active high */
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#define LP_PERRORP 0x08 /* unchanged input, active low */
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/* timeout for each character. This is relative to bus cycles -- it
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* is the count in a busy loop. THIS IS THE VALUE TO CHANGE if you
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* have extremely slow printing, or if the machine seems to slow down
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* a lot when you print. If you have slow printing, increase this
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* number and recompile, and if your system gets bogged down, decrease
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* this number. This can be changed with the tunelp(8) command as well.
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*/
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#define LP_INIT_CHAR 1000
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/* The parallel port specs apparently say that there needs to be
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* a .5usec wait before and after the strobe.
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*/
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#define LP_INIT_WAIT 1
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/* This is the amount of time that the driver waits for the printer to
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* catch up when the printer's buffer appears to be filled. If you
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* want to tune this and have a fast printer (i.e. HPIIIP), decrease
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* this number, and if you have a slow printer, increase this number.
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* This is in hundredths of a second, the default 2 being .05 second.
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* Or use the tunelp(8) command, which is especially nice if you want
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* change back and forth between character and graphics printing, which
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* are wildly different...
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*/
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#define LP_INIT_TIME 2
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/* IOCTL numbers */
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#define LPCHAR 0x0601 /* corresponds to LP_INIT_CHAR */
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#define LPTIME 0x0602 /* corresponds to LP_INIT_TIME */
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#define LPABORT 0x0604 /* call with TRUE arg to abort on error,
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FALSE to retry. Default is retry. */
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#define LPSETIRQ 0x0605 /* call with new IRQ number,
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or 0 for polling (no IRQ) */
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#define LPGETIRQ 0x0606 /* get the current IRQ number */
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#define LPWAIT 0x0608 /* corresponds to LP_INIT_WAIT */
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/* NOTE: LPCAREFUL is obsoleted and it' s always the default right now -arca */
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#define LPCAREFUL 0x0609 /* call with TRUE arg to require out-of-paper, off-
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line, and error indicators good on all writes,
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FALSE to ignore them. Default is ignore. */
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#define LPABORTOPEN 0x060a /* call with TRUE arg to abort open() on error,
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FALSE to ignore error. Default is ignore. */
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#define LPGETSTATUS 0x060b /* return LP_S(minor) */
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#define LPRESET 0x060c /* reset printer */
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#ifdef LP_STATS
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#define LPGETSTATS 0x060d /* get statistics (struct lp_stats) */
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#endif
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#define LPGETFLAGS 0x060e /* get status flags */
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#define LPSETTIMEOUT 0x060f /* set parport timeout */
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/* timeout for printk'ing a timeout, in jiffies (100ths of a second).
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This is also used for re-checking error conditions if LP_ABORT is
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not set. This is the default behavior. */
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#define LP_TIMEOUT_INTERRUPT (60 * HZ)
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#define LP_TIMEOUT_POLLED (10 * HZ)
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#endif /* _LINUX_LP_H */
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