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