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