LXR linux/drivers/comedi/drivers/adv

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * COMEDI driver for Advantech PCI-1720U
   4 * Copyright (c) 2015 H Hartley Sweeten <hsweeten@visionengravers.com>
   5 *
   6 * Separated from the adv_pci1710 driver written by:
   7 * Michal Dobes <dobes@tesnet.cz>
   8 *
   9 * COMEDI - Linux Control and Measurement Device Interface
  10 * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
  11 */
  12
  13/*
  14 * Driver: adv_pci1720
  15 * Description: 4-channel Isolated D/A Output board
  16 * Devices: [Advantech] PCI-7120U (adv_pci1720)
  17 * Author: H Hartley Sweeten <hsweeten@visionengravers.com>
  18 * Updated: Fri, 29 Oct 2015 17:19:35 -0700
  19 * Status: untested
  20 *
  21 * Configuration options: not applicable, uses PCI auto config
  22 *
  23 * The PCI-1720 has 4 isolated 12-bit analog output channels with multiple
  24 * output ranges. It also has a BoardID switch to allow differentiating
  25 * multiple boards in the system.
  26 *
  27 * The analog outputs can operate in two modes, immediate and synchronized.
  28 * This driver currently does not support the synchronized output mode.
  29 *
  30 * Jumpers JP1 to JP4 are used to set the current sink ranges for each
  31 * analog output channel. In order to use the current sink ranges, the
  32 * unipolar 5V range must be used. The voltage output and sink output for
  33 * each channel is available on the connector as separate pins.
  34 *
  35 * Jumper JP5 controls the "hot" reset state of the analog outputs.
  36 * Depending on its setting, the analog outputs will either keep the
  37 * last settings and output values or reset to the default state after
  38 * a "hot" reset. The default state for all channels is uniploar 5V range
  39 * and all the output values are 0V. To allow this feature to work, the
  40 * analog outputs are not "reset" when the driver attaches.
  41 */
  42
  43#include <linux/module.h>
  44#include <linux/delay.h>
  45
  46#include "../comedi_pci.h"
  47
  48/*
  49 * PCI BAR2 Register map (dev->iobase)
  50 */
  51#define PCI1720_AO_LSB_REG(x)           (0x00 + ((x) * 2))
  52#define PCI1720_AO_MSB_REG(x)           (0x01 + ((x) * 2))
  53#define PCI1720_AO_RANGE_REG            0x08
  54#define PCI1720_AO_RANGE(c, r)          (((r) & 0x3) << ((c) * 2))
  55#define PCI1720_AO_RANGE_MASK(c)        PCI1720_AO_RANGE((c), 0x3)
  56#define PCI1720_SYNC_REG                0x09
  57#define PCI1720_SYNC_CTRL_REG           0x0f
  58#define PCI1720_SYNC_CTRL_SC0           BIT(0)
  59#define PCI1720_BOARDID_REG             0x14
  60
  61static const struct comedi_lrange pci1720_ao_range = {
  62        4, {
  63                UNI_RANGE(5),
  64                UNI_RANGE(10),
  65                BIP_RANGE(5),
  66                BIP_RANGE(10)
  67        }
  68};
  69
  70static int pci1720_ao_insn_write(struct comedi_device *dev,
  71                                 struct comedi_subdevice *s,
  72                                 struct comedi_insn *insn,
  73                                 unsigned int *data)
  74{
  75        unsigned int chan = CR_CHAN(insn->chanspec);
  76        unsigned int range = CR_RANGE(insn->chanspec);
  77        unsigned int val;
  78        int i;
  79
  80        /* set the channel range and polarity */
  81        val = inb(dev->iobase + PCI1720_AO_RANGE_REG);
  82        val &= ~PCI1720_AO_RANGE_MASK(chan);
  83        val |= PCI1720_AO_RANGE(chan, range);
  84        outb(val, dev->iobase + PCI1720_AO_RANGE_REG);
  85
  86        val = s->readback[chan];
  87        for (i = 0; i < insn->n; i++) {
  88                val = data[i];
  89
  90                outb(val & 0xff, dev->iobase + PCI1720_AO_LSB_REG(chan));
  91                outb((val >> 8) & 0xff, dev->iobase + PCI1720_AO_MSB_REG(chan));
  92
  93                /* conversion time is 2us (500 kHz throughput) */
  94                usleep_range(2, 100);
  95        }
  96
  97        s->readback[chan] = val;
  98
  99        return insn->n;
 100}
 101
 102static int pci1720_di_insn_bits(struct comedi_device *dev,
 103                                struct comedi_subdevice *s,
 104                                struct comedi_insn *insn,
 105                                unsigned int *data)
 106{
 107        data[1] = inb(dev->iobase + PCI1720_BOARDID_REG);
 108
 109        return insn->n;
 110}
 111
 112static int pci1720_auto_attach(struct comedi_device *dev,
 113                               unsigned long context)
 114{
 115        struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 116        struct comedi_subdevice *s;
 117        int ret;
 118
 119        ret = comedi_pci_enable(dev);
 120        if (ret)
 121                return ret;
 122        dev->iobase = pci_resource_start(pcidev, 2);
 123
 124        ret = comedi_alloc_subdevices(dev, 2);
 125        if (ret)
 126                return ret;
 127
 128        /* Analog Output subdevice */
 129        s = &dev->subdevices[0];
 130        s->type         = COMEDI_SUBD_AO;
 131        s->subdev_flags = SDF_WRITABLE;
 132        s->n_chan       = 4;
 133        s->maxdata      = 0x0fff;
 134        s->range_table  = &pci1720_ao_range;
 135        s->insn_write   = pci1720_ao_insn_write;
 136
 137        ret = comedi_alloc_subdev_readback(s);
 138        if (ret)
 139                return ret;
 140
 141        /* Digital Input subdevice (BoardID SW1) */
 142        s = &dev->subdevices[1];
 143        s->type         = COMEDI_SUBD_DI;
 144        s->subdev_flags = SDF_READABLE;
 145        s->n_chan       = 4;
 146        s->maxdata      = 1;
 147        s->range_table  = &range_digital;
 148        s->insn_bits    = pci1720_di_insn_bits;
 149
 150        /* disable synchronized output, channels update when written */
 151        outb(0, dev->iobase + PCI1720_SYNC_CTRL_REG);
 152
 153        return 0;
 154}
 155
 156static struct comedi_driver adv_pci1720_driver = {
 157        .driver_name    = "adv_pci1720",
 158        .module         = THIS_MODULE,
 159        .auto_attach    = pci1720_auto_attach,
 160        .detach         = comedi_pci_detach,
 161};
 162
 163static int adv_pci1720_pci_probe(struct pci_dev *dev,
 164                                 const struct pci_device_id *id)
 165{
 166        return comedi_pci_auto_config(dev, &adv_pci1720_driver,
 167                                      id->driver_data);
 168}
 169
 170static const struct pci_device_id adv_pci1720_pci_table[] = {
 171        { PCI_DEVICE(PCI_VENDOR_ID_ADVANTECH, 0x1720) },
 172        { 0 }
 173};
 174MODULE_DEVICE_TABLE(pci, adv_pci1720_pci_table);
 175
 176static struct pci_driver adv_pci1720_pci_driver = {
 177        .name           = "adv_pci1720",
 178        .id_table       = adv_pci1720_pci_table,
 179        .probe          = adv_pci1720_pci_probe,
 180        .remove         = comedi_pci_auto_unconfig,
 181};
 182module_comedi_pci_driver(adv_pci1720_driver, adv_pci1720_pci_driver);
 183
 184MODULE_AUTHOR("H Hartley Sweeten <hsweeten@visionengravers.com>");
 185MODULE_DESCRIPTION("Comedi driver for Advantech PCI-1720 Analog Output board");
 186MODULE_LICENSE("GPL");
 187