lp.h 3.7 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100
  1. /*
  2. * usr/include/linux/lp.h c.1991-1992 James Wiegand
  3. * many modifications copyright (C) 1992 Michael K. Johnson
  4. * Interrupt support added 1993 Nigel Gamble
  5. * Removed 8255 status defines from inside __KERNEL__ Marcelo Tosatti
  6. */
  7. #ifndef _LINUX_LP_H
  8. #define _LINUX_LP_H
  9. /*
  10. * Per POSIX guidelines, this module reserves the LP and lp prefixes
  11. * These are the lp_table[minor].flags flags...
  12. */
  13. #define LP_EXIST 0x0001
  14. #define LP_SELEC 0x0002
  15. #define LP_BUSY 0x0004
  16. #define LP_BUSY_BIT_POS 2
  17. #define LP_OFFL 0x0008
  18. #define LP_NOPA 0x0010
  19. #define LP_ERR 0x0020
  20. #define LP_ABORT 0x0040
  21. #define LP_CAREFUL 0x0080 /* obsoleted -arca */
  22. #define LP_ABORTOPEN 0x0100
  23. #define LP_TRUST_IRQ_ 0x0200 /* obsolete */
  24. #define LP_NO_REVERSE 0x0400 /* No reverse mode available. */
  25. #define LP_DATA_AVAIL 0x0800 /* Data is available. */
  26. /*
  27. * bit defines for 8255 status port
  28. * base + 1
  29. * accessed with LP_S(minor), which gets the byte...
  30. */
  31. #define LP_PBUSY 0x80 /* inverted input, active high */
  32. #define LP_PACK 0x40 /* unchanged input, active low */
  33. #define LP_POUTPA 0x20 /* unchanged input, active high */
  34. #define LP_PSELECD 0x10 /* unchanged input, active high */
  35. #define LP_PERRORP 0x08 /* unchanged input, active low */
  36. /* timeout for each character. This is relative to bus cycles -- it
  37. * is the count in a busy loop. THIS IS THE VALUE TO CHANGE if you
  38. * have extremely slow printing, or if the machine seems to slow down
  39. * a lot when you print. If you have slow printing, increase this
  40. * number and recompile, and if your system gets bogged down, decrease
  41. * this number. This can be changed with the tunelp(8) command as well.
  42. */
  43. #define LP_INIT_CHAR 1000
  44. /* The parallel port specs apparently say that there needs to be
  45. * a .5usec wait before and after the strobe.
  46. */
  47. #define LP_INIT_WAIT 1
  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. #define LP_INIT_TIME 2
  58. /* IOCTL numbers */
  59. #define LPCHAR 0x0601 /* corresponds to LP_INIT_CHAR */
  60. #define LPTIME 0x0602 /* corresponds to LP_INIT_TIME */
  61. #define LPABORT 0x0604 /* call with TRUE arg to abort on error,
  62. FALSE to retry. Default is retry. */
  63. #define LPSETIRQ 0x0605 /* call with new IRQ number,
  64. or 0 for polling (no IRQ) */
  65. #define LPGETIRQ 0x0606 /* get the current IRQ number */
  66. #define LPWAIT 0x0608 /* corresponds to LP_INIT_WAIT */
  67. /* NOTE: LPCAREFUL is obsoleted and it' s always the default right now -arca */
  68. #define LPCAREFUL 0x0609 /* call with TRUE arg to require out-of-paper, off-
  69. line, and error indicators good on all writes,
  70. FALSE to ignore them. Default is ignore. */
  71. #define LPABORTOPEN 0x060a /* call with TRUE arg to abort open() on error,
  72. FALSE to ignore error. Default is ignore. */
  73. #define LPGETSTATUS 0x060b /* return LP_S(minor) */
  74. #define LPRESET 0x060c /* reset printer */
  75. #ifdef LP_STATS
  76. #define LPGETSTATS 0x060d /* get statistics (struct lp_stats) */
  77. #endif
  78. #define LPGETFLAGS 0x060e /* get status flags */
  79. #define LPSETTIMEOUT 0x060f /* set parport timeout */
  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. #define LP_TIMEOUT_INTERRUPT (60 * HZ)
  84. #define LP_TIMEOUT_POLLED (10 * HZ)
  85. #endif /* _LINUX_LP_H */