include/linux/lp

/* */
   1 #ifndef _LINUX_LP_H
   2 #define _LINUX_LP_H
   3 
   4 /*
   5  * split in two parts by Joerg Dorchain
   6  * usr/include/linux/lp.h  modified for Amiga by Michael Rausch
   7  * modified for Atari by Andreas Schwab
   8  * bug fixed by Jes Sorensen 18/8-94:
   9  *     It was not possible to compile the kernel only for Atari or Amiga.
  10  *
  11  * linux i386 version  c.1991-1992 James Wiegand
  12  * many modifications copyright (C) 1992 Michael K. Johnson
  13  * Interrupt support added 1993 Nigel Gamble
  14  */
  15 
  16 #include <linux/autoconf.h>
  17 #include <asm/bootinfo.h>
  18 
  19 /*
  20  * Per POSIX guidelines, this module reserves the LP and lp prefixes
  21  * These are the lp_table[minor].flags flags...
  22  */
  23 #define LP_EXIST 0x0001
  24 #define LP_BUSY  0x0004
  25 #define LP_ABORT 0x0040
  26 #define LP_CAREFUL 0x0080
  27 #define LP_ABORTOPEN 0x0100
  28 
  29 /* timeout for each character.  This is relative to bus cycles -- it
  30  * is the count in a busy loop.  THIS IS THE VALUE TO CHANGE if you
  31  * have extremely slow printing, or if the machine seems to slow down
  32  * a lot when you print.  If you have slow printing, increase this
  33  * number and recompile, and if your system gets bogged down, decrease
  34  * this number.  This can be changed with the tunelp(8) command as well.
  35  */
  36 
  37 #define LP_INIT_CHAR 1000
  38 
  39 /* The parallel port specs apparently say that there needs to be
  40  * a .5usec wait before and after the strobe.  Since there are wildly
  41  * different computers running linux, I can't come up with a perfect
  42  * value, but since it worked well on most printers before without,
  43  * I'll initialize it to 0.
  44  */
  45 
  46 #define LP_INIT_WAIT 0
  47 
  48 /* This is the amount of time that the driver waits for the printer to
  49  * catch up when the printer's buffer appears to be filled.  If you
  50  * want to tune this and have a fast printer (i.e. HPIIIP), decrease
  51  * this number, and if you have a slow printer, increase this number.
  52  * This is in hundredths of a second, the default 2 being .05 second.
  53  * Or use the tunelp(8) command, which is especially nice if you want
  54  * change back and forth between character and graphics printing, which
  55  * are wildly different...
  56  */
  57 
  58 #define LP_INIT_TIME 40
  59 
  60 /* IOCTL numbers */
  61 #define LPCHAR   0x0601  /* corresponds to LP_INIT_CHAR */
  62 #define LPTIME   0x0602  /* corresponds to LP_INIT_TIME */
  63 #define LPABORT  0x0604  /* call with TRUE arg to abort on error,
  64                             FALSE to retry.  Default is retry.  */
  65 #define LPSETIRQ 0x0605  /* call with new IRQ number,
  66                             or 0 for polling (no IRQ) */
  67 #define LPGETIRQ 0x0606  /* get the current IRQ number */
  68 #define LPWAIT   0x0608  /* corresponds to LP_INIT_WAIT */
  69 #define LPCAREFUL   0x0609  /* call with TRUE arg to require out-of-paper, off-
  70                             line, and error indicators good on all writes,
  71                             FALSE to ignore them.  Default is ignore. */
  72 #define LPABORTOPEN 0x060a  /* call with TRUE arg to abort open() on error,
  73                             FALSE to ignore error.  Default is ignore.  */
  74 #define LPGETSTATUS 0x060b  /* return LP_S(minor) */
  75 #define LPRESET     0x060c  /* reset printer */
  76 
  77 /* timeout for printk'ing a timeout, in jiffies (100ths of a second).
  78    This is also used for re-checking error conditions if LP_ABORT is
  79    not set.  This is the default behavior. */
  80 
  81 #define LP_TIMEOUT_INTERRUPT    (60 * HZ)
  82 #define LP_TIMEOUT_POLLED       (10 * HZ)
  83 
  84 
  85 #define LP_BUFFER_SIZE 1024 /*256*/
  86 
  87 struct lp_struct {
  88         char *name;
  89         unsigned int irq;
  90         void (*lp_out)(int,int);        /*output char function*/
  91         int (*lp_is_busy)(int);
  92         int (*lp_has_pout)(int);
  93         int (*lp_is_online)(int);
  94         int (*lp_my_interrupt)(int);
  95         int flags;              /*for BUSY... */
  96         unsigned int chars;     /*busy timeout */
  97         unsigned int time;      /*wait time */
  98         unsigned int wait;
  99         struct wait_queue *lp_wait_q; /*strobe wait */
 100         char lp_buffer[LP_BUFFER_SIZE];
 101         int do_print;
 102         unsigned long copy_size,bytes_written;
 103 };
 104 
 105 extern struct lp_struct lp_table[];
 106 
 107 extern int lp_init(void);
 108 
 109 #endif
/* */
root/include/linux/lp_m68k.h

INCLUDED FROM
