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, void)
44 # define BPP_PUT_DATA _IOW('B', 3, int)
45 # define BPP_GET_DATA _IOR('B', 4, void)
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
74
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