/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* * 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 _UAPI_LINUX_LP_H #define _UAPI_LINUX_LP_H #include <linux/types.h> #include <linux/ioctl.h> /* * Per POSIX guidelines, this module reserves the LP and lp prefixes * These are the lp_table[minor].flags flags... */ #define LP_EXIST … #define LP_SELEC … #define LP_BUSY … #define LP_BUSY_BIT_POS … #define LP_OFFL … #define LP_NOPA … #define LP_ERR … #define LP_ABORT … #define LP_CAREFUL … #define LP_ABORTOPEN … #define LP_TRUST_IRQ_ … #define LP_NO_REVERSE … #define LP_DATA_AVAIL … /* * bit defines for 8255 status port * base + 1 * accessed with LP_S(minor), which gets the byte... */ #define LP_PBUSY … #define LP_PACK … #define LP_POUTPA … #define LP_PSELECD … #define LP_PERRORP … /* 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 … /* The parallel port specs apparently say that there needs to be * a .5usec wait before and after the strobe. */ #define LP_INIT_WAIT … /* 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 … /* IOCTL numbers */ #define LPCHAR … #define LPTIME … #define LPABORT … #define LPSETIRQ … #define LPGETIRQ … #define LPWAIT … /* NOTE: LPCAREFUL is obsoleted and it' s always the default right now -arca */ #define LPCAREFUL … #define LPABORTOPEN … #define LPGETSTATUS … #define LPRESET … #ifdef LP_STATS #define LPGETSTATS … #endif #define LPGETFLAGS … #define LPSETTIMEOUT_OLD … #define LPSETTIMEOUT_NEW … #if __BITS_PER_LONG == 64 #define LPSETTIMEOUT … #else #define LPSETTIMEOUT … #endif /* 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 … #define LP_TIMEOUT_POLLED … #endif /* _UAPI_LINUX_LP_H */
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