include/linux/lp_m68k.h

   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 /*
  17  *  many many printers are we going to support? currently, this is the
  18  *  hardcoded limit
  19  */
  20 #define MAX_LP 5
  21
  22 /*
  23  * Per POSIX guidelines, this module reserves the LP and lp prefixes
  24  * These are the lp_table[minor].flags flags...
  25  */
  26 #define LP_EXIST 0x0001
  27 #define LP_BUSY  0x0004
  28 #define LP_ABORT 0x0040
  29 #define LP_CAREFUL 0x0080
  30 #define LP_ABORTOPEN 0x0100
  31
  32 /* timeout for each character.  This is relative to bus cycles -- it
  33  * is the count in a busy loop.  THIS IS THE VALUE TO CHANGE if you
  34  * have extremely slow printing, or if the machine seems to slow down
  35  * a lot when you print.  If you have slow printing, increase this
  36  * number and recompile, and if your system gets bogged down, decrease
  37  * this number.  This can be changed with the tunelp(8) command as well.
  38  */
  39
  40 #define LP_INIT_CHAR 1000
  41
  42 /* The parallel port specs apparently say that there needs to be
  43  * a .5usec wait before and after the strobe.  Since there are wildly
  44  * different computers running linux, I can't come up with a perfect
  45  * value, but since it worked well on most printers before without,
  46  * I'll initialize it to 0.
  47  */
  48
  49 #define LP_INIT_WAIT 0
  50
  51 /* This is the amount of time that the driver waits for the printer to
  52  * catch up when the printer's buffer appears to be filled.  If you
  53  * want to tune this and have a fast printer (i.e. HPIIIP), decrease
  54  * this number, and if you have a slow printer, increase this number.
  55  * This is in hundredths of a second, the default 2 being .05 second.
  56  * Or use the tunelp(8) command, which is especially nice if you want
  57  * change back and forth between character and graphics printing, which
  58  * are wildly different...
  59  */
  60
  61 #define LP_INIT_TIME 40
  62
  63 /* IOCTL numbers */
  64 #define LPCHAR   0x0601  /* corresponds to LP_INIT_CHAR */
  65 #define LPTIME   0x0602  /* corresponds to LP_INIT_TIME */
  66 #define LPABORT  0x0604  /* call with TRUE arg to abort on error,
  67                             FALSE to retry.  Default is retry.  */
  68 #define LPSETIRQ 0x0605  /* call with new IRQ number,
  69                             or 0 for polling (no IRQ) */
  70 #define LPGETIRQ 0x0606  /* get the current IRQ number */
  71 #define LPWAIT   0x0608  /* corresponds to LP_INIT_WAIT */
  72 #define LPCAREFUL   0x0609  /* call with TRUE arg to require out-of-paper, off-
  73                             line, and error indicators good on all writes,
  74                             FALSE to ignore them.  Default is ignore. */
  75 #define LPABORTOPEN 0x060a  /* call with TRUE arg to abort open() on error,
  76                             FALSE to ignore error.  Default is ignore.  */
  77 #define LPGETSTATUS 0x060b  /* return LP_S(minor) */
  78 #define LPRESET     0x060c  /* reset printer */
  79
  80 /* timeout for printk'ing a timeout, in jiffies (100ths of a second).
  81    This is also used for re-checking error conditions if LP_ABORT is
  82    not set.  This is the default behavior. */
  83
  84 #define LP_TIMEOUT_INTERRUPT    (60 * HZ)
  85 #define LP_TIMEOUT_POLLED       (10 * HZ)
  86
  87
  88 #define LP_BUFFER_SIZE 1024 /*256*/
  89
  90 enum lp_type  {
  91 LP_UNKNOWN = 0,
  92 LP_AMIGA = 1,
  93 LP_ATARI = 2,
  94 LP_MFC = 3,
  95 LP_IOEXT = 4
  96 };
  97
  98 /*
  99  * warning: this structure is in kernel space and has to fit in one page,
 100  * i.e. must not be larger than 4k
 101  */
 102 struct lp_struct {
 103         char *name;
 104         unsigned int irq;
 105         void (*lp_out)(int,int);        /*output char function*/
 106         int (*lp_is_busy)(int);
 107         int (*lp_has_pout)(int);
 108         int (*lp_is_online)(int);
 109         int (*lp_dummy)(int);
 110         int (*lp_ioctl)(int, unsigned int, unsigned long);
 111         int (*lp_open)(int);            /* for module use counter */
 112         void (*lp_release)(int);        /* for module use counter */
 113         int flags;              /*for BUSY... */
 114         unsigned int chars;     /*busy timeout */
 115         unsigned int time;      /*wait time */
 116         unsigned int wait;
 117         struct wait_queue *lp_wait_q; /*strobe wait */
 118         void *base;                     /* hardware drivers internal use*/
 119         enum lp_type type;
 120         char lp_buffer[LP_BUFFER_SIZE];
 121         int do_print;
 122         unsigned long copy_size,bytes_written;
 123 };
 124
 125 extern struct lp_struct *lp_table[MAX_LP];
 126 extern unsigned int lp_irq;
 127
 128 void lp_interrupt(int dev);
 129 int lp_init(void);
 130 int register_parallel(struct lp_struct *, int);
 131 void unregister_parallel(int);
 132
 133 #endif