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/
usr/
src/
linux-headers-3.0.0-14-generic-pae/
include/
linux/
- drwxr-xr-x
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Viewing file:  lp.h (6.15 KB) -rw-r--r--Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
#ifndef _LINUX_LP_H
#define _LINUX_LP_H
/*
* 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
*/
/*
* 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)
#ifdef __KERNEL__
#include <linux/wait.h>
#include <linux/mutex.h>
/* Magic numbers for defining port-device mappings */
#define LP_PARPORT_UNSPEC -4
#define LP_PARPORT_AUTO -3
#define LP_PARPORT_OFF -2
#define LP_PARPORT_NONE -1
#define LP_F(minor) lp_table[(minor)].flags /* flags for busy, etc. */
#define LP_CHAR(minor) lp_table[(minor)].chars /* busy timeout */
#define LP_TIME(minor) lp_table[(minor)].time /* wait time */
#define LP_WAIT(minor) lp_table[(minor)].wait /* strobe wait */
#define LP_IRQ(minor) lp_table[(minor)].dev->port->irq /* interrupt # */
/* PARPORT_IRQ_NONE means polled */
#ifdef LP_STATS
#define LP_STAT(minor) lp_table[(minor)].stats /* statistics area */
#endif
#define LP_BUFFER_SIZE PAGE_SIZE
#define LP_BASE(x) lp_table[(x)].dev->port->base
#ifdef LP_STATS
struct lp_stats {
unsigned long chars;
unsigned long sleeps;
unsigned int maxrun;
unsigned int maxwait;
unsigned int meanwait;
unsigned int mdev;
};
#endif
struct lp_struct {
struct pardevice *dev;
unsigned long flags;
unsigned int chars;
unsigned int time;
unsigned int wait;
char *lp_buffer;
#ifdef LP_STATS
unsigned int lastcall;
unsigned int runchars;
struct lp_stats stats;
#endif
wait_queue_head_t waitq;
unsigned int last_error;
struct mutex port_mutex;
wait_queue_head_t dataq;
long timeout;
unsigned int best_mode;
unsigned int current_mode;
unsigned long bits;
};
/*
* The following constants describe the various signals of the printer port
* hardware. Note that the hardware inverts some signals and that some
* signals are active low. An example is LP_STROBE, which must be programmed
* with 1 for being active and 0 for being inactive, because the strobe signal
* gets inverted, but it is also active low.
*/
/*
* defines for 8255 control port
* base + 2
* accessed with LP_C(minor)
*/
#define LP_PINTEN 0x10 /* high to read data in or-ed with data out */
#define LP_PSELECP 0x08 /* inverted output, active low */
#define LP_PINITP 0x04 /* unchanged output, active low */
#define LP_PAUTOLF 0x02 /* inverted output, active low */
#define LP_PSTROBE 0x01 /* short high output on raising edge */
/*
* the value written to ports to test existence. PC-style ports will
* return the value written. AT-style ports will return 0. so why not
* make them the same ?
*/
#define LP_DUMMY 0x00
/*
* This is the port delay time, in microseconds.
* It is used only in the lp_init() and lp_reset() routine.
*/
#define LP_DELAY 50
#endif
#endif
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