185 lines
5.3 KiB
C
185 lines
5.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* COMEDI driver for Advantech PCI-1720U
|
|
* Copyright (c) 2015 H Hartley Sweeten <hsweeten@visionengravers.com>
|
|
*
|
|
* Separated from the adv_pci1710 driver written by:
|
|
* Michal Dobes <dobes@tesnet.cz>
|
|
*
|
|
* COMEDI - Linux Control and Measurement Device Interface
|
|
* Copyright (C) 2000 David A. Schleef <ds@schleef.org>
|
|
*/
|
|
|
|
/*
|
|
* Driver: adv_pci1720
|
|
* Description: 4-channel Isolated D/A Output board
|
|
* Devices: [Advantech] PCI-7120U (adv_pci1720)
|
|
* Author: H Hartley Sweeten <hsweeten@visionengravers.com>
|
|
* Updated: Fri, 29 Oct 2015 17:19:35 -0700
|
|
* Status: untested
|
|
*
|
|
* Configuration options: not applicable, uses PCI auto config
|
|
*
|
|
* The PCI-1720 has 4 isolated 12-bit analog output channels with multiple
|
|
* output ranges. It also has a BoardID switch to allow differentiating
|
|
* multiple boards in the system.
|
|
*
|
|
* The analog outputs can operate in two modes, immediate and synchronized.
|
|
* This driver currently does not support the synchronized output mode.
|
|
*
|
|
* Jumpers JP1 to JP4 are used to set the current sink ranges for each
|
|
* analog output channel. In order to use the current sink ranges, the
|
|
* unipolar 5V range must be used. The voltage output and sink output for
|
|
* each channel is available on the connector as separate pins.
|
|
*
|
|
* Jumper JP5 controls the "hot" reset state of the analog outputs.
|
|
* Depending on its setting, the analog outputs will either keep the
|
|
* last settings and output values or reset to the default state after
|
|
* a "hot" reset. The default state for all channels is uniploar 5V range
|
|
* and all the output values are 0V. To allow this feature to work, the
|
|
* analog outputs are not "reset" when the driver attaches.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/comedi/comedi_pci.h>
|
|
|
|
/*
|
|
* PCI BAR2 Register map (dev->iobase)
|
|
*/
|
|
#define PCI1720_AO_LSB_REG(x) (0x00 + ((x) * 2))
|
|
#define PCI1720_AO_MSB_REG(x) (0x01 + ((x) * 2))
|
|
#define PCI1720_AO_RANGE_REG 0x08
|
|
#define PCI1720_AO_RANGE(c, r) (((r) & 0x3) << ((c) * 2))
|
|
#define PCI1720_AO_RANGE_MASK(c) PCI1720_AO_RANGE((c), 0x3)
|
|
#define PCI1720_SYNC_REG 0x09
|
|
#define PCI1720_SYNC_CTRL_REG 0x0f
|
|
#define PCI1720_SYNC_CTRL_SC0 BIT(0)
|
|
#define PCI1720_BOARDID_REG 0x14
|
|
|
|
static const struct comedi_lrange pci1720_ao_range = {
|
|
4, {
|
|
UNI_RANGE(5),
|
|
UNI_RANGE(10),
|
|
BIP_RANGE(5),
|
|
BIP_RANGE(10)
|
|
}
|
|
};
|
|
|
|
static int pci1720_ao_insn_write(struct comedi_device *dev,
|
|
struct comedi_subdevice *s,
|
|
struct comedi_insn *insn,
|
|
unsigned int *data)
|
|
{
|
|
unsigned int chan = CR_CHAN(insn->chanspec);
|
|
unsigned int range = CR_RANGE(insn->chanspec);
|
|
unsigned int val;
|
|
int i;
|
|
|
|
/* set the channel range and polarity */
|
|
val = inb(dev->iobase + PCI1720_AO_RANGE_REG);
|
|
val &= ~PCI1720_AO_RANGE_MASK(chan);
|
|
val |= PCI1720_AO_RANGE(chan, range);
|
|
outb(val, dev->iobase + PCI1720_AO_RANGE_REG);
|
|
|
|
val = s->readback[chan];
|
|
for (i = 0; i < insn->n; i++) {
|
|
val = data[i];
|
|
|
|
outb(val & 0xff, dev->iobase + PCI1720_AO_LSB_REG(chan));
|
|
outb((val >> 8) & 0xff, dev->iobase + PCI1720_AO_MSB_REG(chan));
|
|
|
|
/* conversion time is 2us (500 kHz throughput) */
|
|
usleep_range(2, 100);
|
|
}
|
|
|
|
s->readback[chan] = val;
|
|
|
|
return insn->n;
|
|
}
|
|
|
|
static int pci1720_di_insn_bits(struct comedi_device *dev,
|
|
struct comedi_subdevice *s,
|
|
struct comedi_insn *insn,
|
|
unsigned int *data)
|
|
{
|
|
data[1] = inb(dev->iobase + PCI1720_BOARDID_REG);
|
|
|
|
return insn->n;
|
|
}
|
|
|
|
static int pci1720_auto_attach(struct comedi_device *dev,
|
|
unsigned long context)
|
|
{
|
|
struct pci_dev *pcidev = comedi_to_pci_dev(dev);
|
|
struct comedi_subdevice *s;
|
|
int ret;
|
|
|
|
ret = comedi_pci_enable(dev);
|
|
if (ret)
|
|
return ret;
|
|
dev->iobase = pci_resource_start(pcidev, 2);
|
|
|
|
ret = comedi_alloc_subdevices(dev, 2);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Analog Output subdevice */
|
|
s = &dev->subdevices[0];
|
|
s->type = COMEDI_SUBD_AO;
|
|
s->subdev_flags = SDF_WRITABLE;
|
|
s->n_chan = 4;
|
|
s->maxdata = 0x0fff;
|
|
s->range_table = &pci1720_ao_range;
|
|
s->insn_write = pci1720_ao_insn_write;
|
|
|
|
ret = comedi_alloc_subdev_readback(s);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Digital Input subdevice (BoardID SW1) */
|
|
s = &dev->subdevices[1];
|
|
s->type = COMEDI_SUBD_DI;
|
|
s->subdev_flags = SDF_READABLE;
|
|
s->n_chan = 4;
|
|
s->maxdata = 1;
|
|
s->range_table = &range_digital;
|
|
s->insn_bits = pci1720_di_insn_bits;
|
|
|
|
/* disable synchronized output, channels update when written */
|
|
outb(0, dev->iobase + PCI1720_SYNC_CTRL_REG);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct comedi_driver adv_pci1720_driver = {
|
|
.driver_name = "adv_pci1720",
|
|
.module = THIS_MODULE,
|
|
.auto_attach = pci1720_auto_attach,
|
|
.detach = comedi_pci_detach,
|
|
};
|
|
|
|
static int adv_pci1720_pci_probe(struct pci_dev *dev,
|
|
const struct pci_device_id *id)
|
|
{
|
|
return comedi_pci_auto_config(dev, &adv_pci1720_driver,
|
|
id->driver_data);
|
|
}
|
|
|
|
static const struct pci_device_id adv_pci1720_pci_table[] = {
|
|
{ PCI_DEVICE(PCI_VENDOR_ID_ADVANTECH, 0x1720) },
|
|
{ 0 }
|
|
};
|
|
MODULE_DEVICE_TABLE(pci, adv_pci1720_pci_table);
|
|
|
|
static struct pci_driver adv_pci1720_pci_driver = {
|
|
.name = "adv_pci1720",
|
|
.id_table = adv_pci1720_pci_table,
|
|
.probe = adv_pci1720_pci_probe,
|
|
.remove = comedi_pci_auto_unconfig,
|
|
};
|
|
module_comedi_pci_driver(adv_pci1720_driver, adv_pci1720_pci_driver);
|
|
|
|
MODULE_AUTHOR("H Hartley Sweeten <hsweeten@visionengravers.com>");
|
|
MODULE_DESCRIPTION("Comedi driver for Advantech PCI-1720 Analog Output board");
|
|
MODULE_LICENSE("GPL");
|