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bpp.h
Package: linux-2.4.20.tar.gz [view]
Upload User: jlfgdled
Upload Date: 2013-04-10
Package Size: 33168k
Code Size: 2k
Category:
Linux-Unix program
Development Platform:
Unix_Linux
- #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 COMPATABILITY 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, void)
- # define BPP_PUT_DATA _IOW('B', 3, int)
- # define BPP_GET_DATA _IOR('B', 4, void)
- /*
- * 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