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#ifndef _LINUX_LP_H

#define _LINUX_LP_H

/*

 * split in two parts by Joerg Dorchain

 * usr/include/linux/lp.h  modified for Amiga by Michael Rausch

 * modified for Atari by Andreas Schwab

 * bug fixed by Jes Sorensen 18/8-94:

 *     It was not possible to compile the kernel only for Atari or Amiga.

 *

 * linux i386 version  c.1991-1992 James Wiegand

 * many modifications copyright (C) 1992 Michael K. Johnson

 * Interrupt support added 1993 Nigel Gamble

 */

#include <linux/autoconf.h>

#include <asm/bootinfo.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_BUSY  0x0004

#define LP_ABORT 0x0040

#define LP_CAREFUL 0x0080

#define LP_ABORTOPEN 0x0100

/* 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.  Since there are wildly

 * different computers running linux, I can't come up with a perfect

 * value, but since it worked well on most printers before without,

 * I'll initialize it to 0.

 */

#define LP_INIT_WAIT 0

/* 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 40

/* 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 */

#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 */

/* 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)

#define LP_BUFFER_SIZE 1024 /*256*/

struct lp_struct {

        char *name;

        unsigned int irq;

        void (*lp_out)(int,int);        /*output char function*/

        int (*lp_is_busy)(int);

        int (*lp_has_pout)(int);

        int (*lp_is_online)(int);

        int (*lp_my_interrupt)(int);

        int flags;              /*for BUSY... */

        unsigned int chars;     /*busy timeout */

        unsigned int time;      /*wait time */

        unsigned int wait;

        struct wait_queue *lp_wait_q; /*strobe wait */

        char lp_buffer[LP_BUFFER_SIZE];

        int do_print;

        unsigned long copy_size,bytes_written;

};

extern struct lp_struct lp_table[];

extern int lp_init(void);

#endif