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staging: comedi: comedi_parport: tidy up multi-line comments
Tidy up the multi-line comments to follow the CodingStyle. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Reviewed-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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H Hartley Sweeten
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Greg Kroah-Hartman
Greg Kroah-Hartman
parent
88f0b62baf
commit
7821e8e496
@@ -1,79 +1,67 @@
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/*
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comedi/drivers/comedi_parport.c
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hardware driver for standard parallel port
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* comedi_parport.c
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* Comedi driver for standard parallel port
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*
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* For more information see:
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* http://retired.beyondlogic.org/spp/parallel.htm
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*
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* COMEDI - Linux Control and Measurement Device Interface
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* Copyright (C) 1998,2001 David A. Schleef <ds@schleef.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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COMEDI - Linux Control and Measurement Device Interface
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Copyright (C) 1998,2001 David A. Schleef <ds@schleef.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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*/
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/*
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Driver: comedi_parport
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Description: Standard PC parallel port
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Author: ds
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Status: works in immediate mode
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Devices: [standard] parallel port (comedi_parport)
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Updated: Tue, 30 Apr 2002 21:11:45 -0700
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A cheap and easy way to get a few more digital I/O lines. Steal
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additional parallel ports from old computers or your neighbors'
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computers.
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Option list:
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0: I/O port base for the parallel port.
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1: IRQ
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Parallel Port Lines:
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pin subdev chan aka
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--- ------ ---- ---
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1 2 0 strobe
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2 0 0 data 0
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3 0 1 data 1
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4 0 2 data 2
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5 0 3 data 3
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6 0 4 data 4
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7 0 5 data 5
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8 0 6 data 6
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9 0 7 data 7
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10 1 3 acknowledge
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11 1 4 busy
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12 1 2 output
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13 1 1 printer selected
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14 2 1 auto LF
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15 1 0 error
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16 2 2 init
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17 2 3 select printer
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18-25 ground
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Notes:
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Subdevices 0 is digital I/O, subdevice 1 is digital input, and
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subdevice 2 is digital output. Unlike other Comedi devices,
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subdevice 0 defaults to output.
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Pins 13 and 14 are inverted once by Comedi and once by the
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hardware, thus cancelling the effect.
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Pin 1 is a strobe, thus acts like one. There's no way in software
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to change this, at least on a standard parallel port.
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Subdevice 3 pretends to be a digital input subdevice, but it always
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returns 0 when read. However, if you run a command with
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scan_begin_src=TRIG_EXT, it uses pin 10 as a external triggering
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pin, which can be used to wake up tasks.
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*/
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/*
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see http://www.beyondlogic.org/ for information.
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or http://www.linux-magazin.de/ausgabe/1999/10/IO/io.html
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* Driver: comedi_parport
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* Description: Standard PC parallel port
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* Author: ds
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* Status: works in immediate mode
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* Devices: (standard) parallel port [comedi_parport]
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* Updated: Tue, 30 Apr 2002 21:11:45 -0700
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*
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* A cheap and easy way to get a few more digital I/O lines. Steal
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* additional parallel ports from old computers or your neighbors'
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* computers.
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*
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* Option list:
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* 0: I/O port base for the parallel port.
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* 1: IRQ (optional)
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*
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* Parallel Port Lines:
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*
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* pin subdev chan type name
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* ----- ------ ---- ---- --------------
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* 1 2 0 DO strobe
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* 2 0 0 DIO data 0
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* 3 0 1 DIO data 1
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* 4 0 2 DIO data 2
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* 5 0 3 DIO data 3
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* 6 0 4 DIO data 4
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* 7 0 5 DIO data 5
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* 8 0 6 DIO data 6
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* 9 0 7 DIO data 7
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* 10 1 3 DI ack
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* 11 1 4 DI busy
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* 12 1 2 DI paper out
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* 13 1 1 DI select in
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* 14 2 1 DO auto LF
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* 15 1 0 DI error
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* 16 2 2 DO init
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* 17 2 3 DO select printer
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* 18-25 ground
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*
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* When an IRQ is configured subdevice 3 pretends to be a digital
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* input subdevice, but it always returns 0 when read. However, if
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* you run a command with scan_begin_src=TRIG_EXT, it uses pin 10
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* as a external trigger, which can be used to wake up tasks.
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*/
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#include <linux/module.h>
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