143 lines
3.2 KiB
C
143 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* fl512.c
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* Anders Gnistrup <ex18@kalman.iau.dtu.dk>
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*
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* COMEDI - Linux Control and Measurement Device Interface
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* Copyright (C) 2000 David A. Schleef <ds@schleef.org>
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*/
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/*
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* Driver: fl512
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* Description: unknown
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* Author: Anders Gnistrup <ex18@kalman.iau.dtu.dk>
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* Devices: [unknown] FL512 (fl512)
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* Status: unknown
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*
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* Digital I/O is not supported.
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*
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* Configuration options:
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* [0] - I/O port base address
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*/
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#include <linux/module.h>
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#include <linux/comedi/comedidev.h>
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#include <linux/delay.h>
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/*
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* Register I/O map
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*/
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#define FL512_AI_LSB_REG 0x02
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#define FL512_AI_MSB_REG 0x03
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#define FL512_AI_MUX_REG 0x02
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#define FL512_AI_START_CONV_REG 0x03
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#define FL512_AO_DATA_REG(x) (0x04 + ((x) * 2))
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#define FL512_AO_TRIG_REG(x) (0x04 + ((x) * 2))
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static const struct comedi_lrange range_fl512 = {
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4, {
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BIP_RANGE(0.5),
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BIP_RANGE(1),
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BIP_RANGE(5),
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BIP_RANGE(10),
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UNI_RANGE(1),
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UNI_RANGE(5),
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UNI_RANGE(10)
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}
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};
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static int fl512_ai_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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unsigned int chan = CR_CHAN(insn->chanspec);
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unsigned int val;
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int i;
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outb(chan, dev->iobase + FL512_AI_MUX_REG);
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for (i = 0; i < insn->n; i++) {
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outb(0, dev->iobase + FL512_AI_START_CONV_REG);
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/* XXX should test "done" flag instead of delay */
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usleep_range(30, 100);
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val = inb(dev->iobase + FL512_AI_LSB_REG);
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val |= (inb(dev->iobase + FL512_AI_MSB_REG) << 8);
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val &= s->maxdata;
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data[i] = val;
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}
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return insn->n;
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}
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static int fl512_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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unsigned int chan = CR_CHAN(insn->chanspec);
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unsigned int val = s->readback[chan];
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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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/* write LSB, MSB then trigger conversion */
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outb(val & 0x0ff, dev->iobase + FL512_AO_DATA_REG(chan));
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outb((val >> 8) & 0xf, dev->iobase + FL512_AO_DATA_REG(chan));
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inb(dev->iobase + FL512_AO_TRIG_REG(chan));
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}
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s->readback[chan] = val;
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return insn->n;
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}
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static int fl512_attach(struct comedi_device *dev, struct comedi_devconfig *it)
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{
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struct comedi_subdevice *s;
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int ret;
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ret = comedi_request_region(dev, it->options[0], 0x10);
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if (ret)
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return ret;
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ret = comedi_alloc_subdevices(dev, 2);
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if (ret)
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return ret;
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/* Analog Input subdevice */
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s = &dev->subdevices[0];
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s->type = COMEDI_SUBD_AI;
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s->subdev_flags = SDF_READABLE | SDF_GROUND;
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s->n_chan = 16;
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s->maxdata = 0x0fff;
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s->range_table = &range_fl512;
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s->insn_read = fl512_ai_insn_read;
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/* Analog Output subdevice */
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s = &dev->subdevices[1];
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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 = &range_fl512;
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s->insn_write = fl512_ao_insn_write;
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return comedi_alloc_subdev_readback(s);
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}
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static struct comedi_driver fl512_driver = {
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.driver_name = "fl512",
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.module = THIS_MODULE,
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.attach = fl512_attach,
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.detach = comedi_legacy_detach,
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};
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module_comedi_driver(fl512_driver);
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MODULE_AUTHOR("Comedi https://www.comedi.org");
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MODULE_DESCRIPTION("Comedi low-level driver");
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MODULE_LICENSE("GPL");
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