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Commit 53bd9a20 authored by Ian Abbott's avatar Ian Abbott Committed by Greg Kroah-Hartman
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staging: comedi: amplc_pci224: reformat some comments 

Reformat comments to fit in with the preferred coding style, including
the copyright and comedi driver description comments at the start of the
file.  Also, remove a boiler-plate comment for the comedi device private
data structure.
Signed-off-by: default avatarIan Abbott <abbotti@mev.co.uk>
Reviewed-by: default avatarH Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 1566ac0b
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drivers/staging/comedi/drivers/amplc_pci224.c
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/*
comedi/drivers/amplc_pci224.c
Driver for Amplicon PCI224 and PCI234 AO boards.
Copyright (C) 2005 MEV Ltd. <http://www.mev.co.uk/>
COMEDI - Linux Control and Measurement Device Interface
Copyright (C) 1998,2000 David A. Schleef <ds@schleef.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
* comedi/drivers/amplc_pci224.c
* Driver for Amplicon PCI224 and PCI234 AO boards.
*
* Copyright (C) 2005 MEV Ltd. <http://www.mev.co.uk/>
*
* COMEDI - Linux Control and Measurement Device Interface
* Copyright (C) 1998,2000 David A. Schleef <ds@schleef.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
*/
/*
Driver: amplc_pci224
Description: Amplicon PCI224, PCI234
Author: Ian Abbott <abbotti@mev.co.uk>
Devices: [Amplicon] PCI224 (amplc_pci224 or pci224),
PCI234 (amplc_pci224 or pci234)
Updated: Wed, 22 Oct 2008 12:25:08 +0100
Status: works, but see caveats
Supports:
- ao_insn read/write
- ao_do_cmd mode with the following sources:
- start_src TRIG_INT TRIG_EXT
- scan_begin_src TRIG_TIMER TRIG_EXT
- convert_src TRIG_NOW
- scan_end_src TRIG_COUNT
- stop_src TRIG_COUNT TRIG_EXT TRIG_NONE
The channel list must contain at least one channel with no repeated
channels. The scan end count must equal the number of channels in
the channel list.
There is only one external trigger source so only one of start_src,
scan_begin_src or stop_src may use TRIG_EXT.
Configuration options - PCI224:
[0] - PCI bus of device (optional).
[1] - PCI slot of device (optional).
If bus/slot is not specified, the first available PCI device
will be used.
[2] - Select available ranges according to jumper LK1. All channels
are set to the same range:
0=Jumper position 1-2 (factory default), 4 software-selectable
internal voltage references, giving 4 bipolar and 4 unipolar
ranges:
[-10V,+10V], [-5V,+5V], [-2.5V,+2.5V], [-1.25V,+1.25V],
[0,+10V], [0,+5V], [0,+2.5V], [0,1.25V].
1=Jumper position 2-3, 1 external voltage reference, giving
1 bipolar and 1 unipolar range:
[-Vext,+Vext], [0,+Vext].
Configuration options - PCI234:
[0] - PCI bus of device (optional).
[1] - PCI slot of device (optional).
If bus/slot is not specified, the first available PCI device
will be used.
[2] - Select internal or external voltage reference according to
jumper LK1. This affects all channels:
0=Jumper position 1-2 (factory default), Vref=5V internal.
1=Jumper position 2-3, Vref=Vext external.
[3] - Select channel 0 range according to jumper LK2:
0=Jumper position 2-3 (factory default), range [-2*Vref,+2*Vref]
(10V bipolar when options[2]=0).
1=Jumper position 1-2, range [-Vref,+Vref]
(5V bipolar when options[2]=0).
[4] - Select channel 1 range according to jumper LK3: cf. options[3].
[5] - Select channel 2 range according to jumper LK4: cf. options[3].
[6] - Select channel 3 range according to jumper LK5: cf. options[3].
Passing a zero for an option is the same as leaving it unspecified.
Caveats:
1) All channels on the PCI224 share the same range. Any change to the
range as a result of insn_write or a streaming command will affect
the output voltages of all channels, including those not specified
by the instruction or command.
2) For the analog output command, the first scan may be triggered
falsely at the start of acquisition. This occurs when the DAC scan
trigger source is switched from 'none' to 'timer' (scan_begin_src =
TRIG_TIMER) or 'external' (scan_begin_src == TRIG_EXT) at the start
of acquisition and the trigger source is at logic level 1 at the
time of the switch. This is very likely for TRIG_TIMER. For
TRIG_EXT, it depends on the state of the external line and whether
the CR_INVERT flag has been set. The remaining scans are triggered
correctly.
*/
* Driver: amplc_pci224
* Description: Amplicon PCI224, PCI234
* Author: Ian Abbott <abbotti@mev.co.uk>
* Devices: [Amplicon] PCI224 (amplc_pci224 or pci224),
* PCI234 (amplc_pci224 or pci234)
* Updated: Wed, 22 Oct 2008 12:25:08 +0100
* Status: works, but see caveats
*
* Supports:
*
* - ao_insn read/write
* - ao_do_cmd mode with the following sources:
*
* - start_src TRIG_INT TRIG_EXT
* - scan_begin_src TRIG_TIMER TRIG_EXT
* - convert_src TRIG_NOW
* - scan_end_src TRIG_COUNT
* - stop_src TRIG_COUNT TRIG_EXT TRIG_NONE
*
* The channel list must contain at least one channel with no repeated
* channels. The scan end count must equal the number of channels in
* the channel list.
*
* There is only one external trigger source so only one of start_src,
* scan_begin_src or stop_src may use TRIG_EXT.
*
* Configuration options - PCI224:
* [0] - PCI bus of device (optional).
* [1] - PCI slot of device (optional).
* If bus/slot is not specified, the first available PCI device
* will be used.
* [2] - Select available ranges according to jumper LK1. All channels
* are set to the same range:
* 0=Jumper position 1-2 (factory default), 4 software-selectable
* internal voltage references, giving 4 bipolar and 4 unipolar
* ranges:
* [-10V,+10V], [-5V,+5V], [-2.5V,+2.5V], [-1.25V,+1.25V],
* [0,+10V], [0,+5V], [0,+2.5V], [0,1.25V].
* 1=Jumper position 2-3, 1 external voltage reference, giving
* 1 bipolar and 1 unipolar range:
* [-Vext,+Vext], [0,+Vext].
*
* Configuration options - PCI234:
* [0] - PCI bus of device (optional).
* [1] - PCI slot of device (optional).
* If bus/slot is not specified, the first available PCI device
* will be used.
* [2] - Select internal or external voltage reference according to
* jumper LK1. This affects all channels:
* 0=Jumper position 1-2 (factory default), Vref=5V internal.
* 1=Jumper position 2-3, Vref=Vext external.
* [3] - Select channel 0 range according to jumper LK2:
* 0=Jumper position 2-3 (factory default), range [-2*Vref,+2*Vref]
* (10V bipolar when options[2]=0).
* 1=Jumper position 1-2, range [-Vref,+Vref]
* (5V bipolar when options[2]=0).
* [4] - Select channel 1 range according to jumper LK3: cf. options[3].
* [5] - Select channel 2 range according to jumper LK4: cf. options[3].
* [6] - Select channel 3 range according to jumper LK5: cf. options[3].
*
* Passing a zero for an option is the same as leaving it unspecified.
*
* Caveats:
*
* 1) All channels on the PCI224 share the same range. Any change to the
* range as a result of insn_write or a streaming command will affect
* the output voltages of all channels, including those not specified
* by the instruction or command.
*
* 2) For the analog output command, the first scan may be triggered
* falsely at the start of acquisition. This occurs when the DAC scan
* trigger source is switched from 'none' to 'timer' (scan_begin_src =
* TRIG_TIMER) or 'external' (scan_begin_src == TRIG_EXT) at the start
* of acquisition and the trigger source is at logic level 1 at the
* time of the switch. This is very likely for TRIG_TIMER. For
* TRIG_EXT, it depends on the state of the external line and whether
* the CR_INVERT flag has been set. The remaining scans are triggered
* correctly.
*/
#include <linux/module.h>
#include <linux/pci.h>
......@@ -299,16 +300,20 @@ static const unsigned short hwrange_pci224_external[2] = {
PCI224_DACCON_POLAR_UNI,
};
/* The hardware selectable Vref*2 external range for PCI234
* (option[2] == 1, option[3+n] == 0). */
/*
* The hardware selectable Vref*2 external range for PCI234
* (option[2] == 1, option[3+n] == 0).
*/
static const struct comedi_lrange range_pci234_ext2 = {
1, {
RANGE_ext(-2, 2)
}
};
/* The hardware selectable Vref external range for PCI234
* (option[2] == 1, option[3+n] == 1). */
/*
* The hardware selectable Vref external range for PCI234
* (option[2] == 1, option[3+n] == 1).
*/
static const struct comedi_lrange range_pci234_ext = {
1, {
RANGE_ext(-1, 1)
......@@ -356,9 +361,6 @@ static const struct pci224_board pci224_boards[] = {
},
};
/* this structure is for data unique to this hardware driver. If
several hardware drivers keep similar information in this structure,
feel free to suggest moving the variable to the struct comedi_device struct. */
struct pci224_private {
const unsigned short *hwrange;
unsigned long iobase1;
......@@ -428,8 +430,10 @@ pci224_ao_insn_write(struct comedi_device *dev, struct comedi_subdevice *s,
chan = CR_CHAN(insn->chanspec);
range = CR_RANGE(insn->chanspec);
/* Writing a list of values to an AO channel is probably not
* very useful, but that's how the interface is defined. */
/*
* Writing a list of values to an AO channel is probably not
* very useful, but that's how the interface is defined.
*/
for (i = 0; i < insn->n; i++)
pci224_ao_set_data(dev, chan, range, data[i]);
......
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