include/asm-sparc/bpp.h

   1 #ifndef _SPARC_BPP_H
   2 #define _SPARC_BPP_H
   3
   4 /*
   5  * Copyright (c) 1995 Picture Elements
   6  *      Stephen Williams
   7  *      Gus Baldauf
   8  *
   9  * Linux/SPARC port by Peter Zaitcev.
  10  * Integration into SPARC tree by Tom Dyas.
  11  */
  12
  13 #include  <linux/ioctl.h>
  14
  15 /*
  16  * This is a driver that supports IEEE Std 1284-1994 communications
  17  * with compliant or compatible devices. It will use whatever features
  18  * the device supports, prefering those that are typically faster.
  19  *
  20  * When the device is opened, it is left in COMPATABILITY mode, and
  21  * writes work like any printer device. The driver only attempt to
  22  * negotiate 1284 modes when needed so that plugs can be pulled,
  23  * switch boxes switched, etc., without disrupting things. It will
  24  * also leave the device in compatibility mode when closed.
  25  */
  26
  27
  28
  29 /*
  30  * This driver also supplies ioctls to manually manipulate the
  31  * pins. This is great for testing devices, or writing code to deal
  32  * with bizzarro-mode of the ACME Special TurboThingy Plus.
  33  *
  34  * NOTE: These ioctl currently do not interact well with
  35  * read/write. Caveat emptor.
  36  *
  37  * PUT_PINS allows us to assign the sense of all the pins, including
  38  * the data pins if being driven by the host. The GET_PINS returns the
  39  * pins that the peripheral drives, including data if appropriate.
  40  */
  41
  42 # define BPP_PUT_PINS _IOW('B', 1, int)
  43 # define BPP_GET_PINS _IOR('B', 2, char) /* that's bogus - should've been _IO */
  44 # define BPP_PUT_DATA _IOW('B', 3, int)
  45 # define BPP_GET_DATA _IOR('B', 4, char) /* ditto */
  46
  47 /*
  48  * Set the data bus to input mode. Disengage the data bin driver and
  49  * be prepared to read values from the peripheral. If the arg is 0,
  50  * then revert the bus to output mode.
  51  */
  52 # define BPP_SET_INPUT _IOW('B', 5, int)
  53
  54 /*
  55  * These bits apply to the PUT operation...
  56  */
  57 # define BPP_PP_nStrobe   0x0001
  58 # define BPP_PP_nAutoFd   0x0002
  59 # define BPP_PP_nInit     0x0004
  60 # define BPP_PP_nSelectIn 0x0008
  61
  62 /*
  63  * These apply to the GET operation, which also reads the current value
  64  * of the previously put values. A bit mask of these will be returned
  65  * as a bit mask in the return code of the ioctl().
  66  */
  67 # define BPP_GP_nAck   0x0100
  68 # define BPP_GP_Busy   0x0200
  69 # define BPP_GP_PError 0x0400
  70 # define BPP_GP_Select 0x0800
  71 # define BPP_GP_nFault 0x1000
  72
  73 #endif