staging: comedi: dac02: introduce comedi driver for DAC02 boards
This board is currently supported by the poc driver. That driver used to support a number of simple boards but now only provides support for the DAC02 board. Introduce a new comedi driver specifically for the DAC02 board. This allows cleaning up all the cruft. 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>
This commit is contained in:
H Hartley Sweeten
Greg Kroah-Hartman
Родитель
a100032b5b
Коммит
99999e2747
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@ -260,6 +260,14 @@ config COMEDI_RTI802
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To compile this driver as a module, choose M here: the module will be
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called rti802.
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config COMEDI_DAC02
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tristate "Keithley Metrabyte DAC02 compatible ISA card support"
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---help---
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Enable support for Keithley Metrabyte DAC02 compatible ISA cards.
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To compile this driver as a module, choose M here: the module will be
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called dac02.
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config COMEDI_DAS16M1
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tristate "MeasurementComputing CIO-DAS16/M1DAS-16 ISA card support"
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select COMEDI_8255
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@ -24,6 +24,7 @@ obj-$(CONFIG_COMEDI_PCL818) += pcl818.o
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obj-$(CONFIG_COMEDI_PCM3724) += pcm3724.o
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obj-$(CONFIG_COMEDI_RTI800) += rti800.o
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obj-$(CONFIG_COMEDI_RTI802) += rti802.o
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obj-$(CONFIG_COMEDI_DAC02) += dac02.o
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obj-$(CONFIG_COMEDI_DAS16M1) += das16m1.o
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obj-$(CONFIG_COMEDI_DAS08_ISA) += das08_isa.o
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obj-$(CONFIG_COMEDI_DAS16) += das16.o
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@ -0,0 +1,172 @@
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/*
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* dac02.c
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* Comedi driver for DAC02 compatible boards
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* Copyright (C) 2014 H Hartley Sweeten <hsweeten@visionengravers.com>
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*
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* Based on the poc driver
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* Copyright (C) 2000 Frank Mori Hess <fmhess@users.sourceforge.net>
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* Copyright (C) 2001 David A. Schleef <ds@schleef.org>
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*
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* COMEDI - Linux Control and Measurement Device Interface
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* Copyright (C) 1998 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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/*
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* Driver: dac02
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* Description: Comedi driver for DAC02 compatible boards
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* Devices: (Keithley Metrabyte) DAC-02 [dac02]
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* Author: H Hartley Sweeten <hsweeten@visionengravers.com>
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* Updated: Tue, 11 Mar 2014 11:27:19 -0700
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* Status: unknown
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*
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* Configuration options:
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* [0] - I/O port base
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*/
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#include <linux/module.h>
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#include "../comedidev.h"
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/*
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* The output range is selected by jumpering pins on the I/O connector.
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*
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* Range Chan # Jumper pins Output
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* ------------- ------ ------------- -----------------
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* 0 to 5V 0 21 to 22 24
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* 1 15 to 16 18
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* 0 to 10V 0 20 to 22 24
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* 1 14 to 16 18
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* +/-5V 0 21 to 22 23
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* 1 15 to 16 17
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* +/-10V 0 20 to 22 23
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* 1 14 to 16 17
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* 4 to 20mA 0 21 to 22 25
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* 1 15 to 16 19
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* AC reference 0 In on pin 22 24 (2-quadrant)
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* In on pin 22 23 (4-quadrant)
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* 1 In on pin 16 18 (2-quadrant)
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* In on pin 16 17 (4-quadrant)
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*/
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static const struct comedi_lrange das02_ao_ranges = {
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6, {
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UNI_RANGE(5),
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UNI_RANGE(10),
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BIP_RANGE(5),
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BIP_RANGE(10),
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RANGE_mA(4, 20),
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RANGE_ext(0, 1)
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}
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};
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struct dac02_private {
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unsigned int ao_readback[2];
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};
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/*
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* Register I/O map
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*/
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#define DAC02_AO_LSB(x) (0x00 + ((x) * 2))
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#define DAC02_AO_MSB(x) (0x01 + ((x) * 2))
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static int dac02_ao_insn_write(struct comedi_device *dev,
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struct comedi_subdevice *s,
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struct comedi_insn *insn,
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unsigned int *data)
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{
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struct dac02_private *devpriv = dev->private;
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unsigned int chan = CR_CHAN(insn->chanspec);
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unsigned int range = CR_RANGE(insn->chanspec);
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unsigned int val;
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int i;
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for (i = 0; i < insn->n; i++) {
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val = data[i];
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devpriv->ao_readback[chan] = val;
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/*
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* Unipolar outputs are true binary encoding.
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* Bipolar outputs are complementary offset binary
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* (that is, 0 = +full scale, maxdata = -full scale).
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*/
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if (comedi_range_is_bipolar(s, range))
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val = s->maxdata - val;
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/*
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* DACs are double-buffered.
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* Write LSB then MSB to latch output.
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*/
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outb((val << 4) & 0xf0, dev->iobase + DAC02_AO_LSB(chan));
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outb((val >> 4) & 0xff, dev->iobase + DAC02_AO_MSB(chan));
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}
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return insn->n;
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}
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static int dac02_ao_insn_read(struct comedi_device *dev,
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struct comedi_subdevice *s,
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struct comedi_insn *insn,
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unsigned int *data)
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{
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struct dac02_private *devpriv = dev->private;
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unsigned int chan = CR_CHAN(insn->chanspec);
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int i;
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for (i = 0; i < insn->n; i++)
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data[i] = devpriv->ao_readback[chan];
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return insn->n;
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}
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static int dac02_attach(struct comedi_device *dev, struct comedi_devconfig *it)
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{
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struct dac02_private *devpriv;
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struct comedi_subdevice *s;
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int ret;
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devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
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if (!devpriv)
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return -ENOMEM;
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ret = comedi_request_region(dev, it->options[0], 0x08);
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if (ret)
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return ret;
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ret = comedi_alloc_subdevices(dev, 1);
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if (ret)
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return ret;
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/* Analog Output subdevice */
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s = &dev->subdevices[0];
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s->type = COMEDI_SUBD_AO;
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s->subdev_flags = SDF_WRITABLE;
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s->n_chan = 2;
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s->maxdata = 0x0fff;
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s->range_table = &das02_ao_ranges;
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s->insn_write = dac02_ao_insn_write;
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s->insn_read = dac02_ao_insn_read;
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return 0;
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}
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static struct comedi_driver dac02_driver = {
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.driver_name = "dac02",
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.module = THIS_MODULE,
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.attach = dac02_attach,
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.detach = comedi_legacy_detach,
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};
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module_comedi_driver(dac02_driver);
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MODULE_AUTHOR("H Hartley Sweeten <hsweeten@visionengravers.com>");
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MODULE_DESCRIPTION("Comedi driver for DAC02 compatible boards");
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MODULE_LICENSE("GPL");
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