LXR linux/drivers/comedi/drivers/dyna

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * comedi/drivers/dyna_pci10xx.c
   4 * Copyright (C) 2011 Prashant Shah, pshah.mumbai@gmail.com
   5 */
   6
   7/*
   8 * Driver: dyna_pci10xx
   9 * Description: Dynalog India PCI DAQ Cards, http://www.dynalogindia.com/
  10 * Devices: [Dynalog] PCI-1050 (dyna_pci1050)
  11 * Author: Prashant Shah <pshah.mumbai@gmail.com>
  12 * Status: Stable
  13 *
  14 * Developed at Automation Labs, Chemical Dept., IIT Bombay, India.
  15 * Prof. Kannan Moudgalya <kannan@iitb.ac.in>
  16 * http://www.iitb.ac.in
  17 *
  18 * Notes :
  19 * - Dynalog India Pvt. Ltd. does not have a registered PCI Vendor ID and
  20 *   they are using the PLX Technlogies Vendor ID since that is the PCI Chip
  21 *   used in the card.
  22 * - Dynalog India Pvt. Ltd. has provided the internal register specification
  23 *   for their cards in their manuals.
  24 */
  25
  26#include <linux/module.h>
  27#include <linux/delay.h>
  28#include <linux/mutex.h>
  29
  30#include "../comedi_pci.h"
  31
  32#define READ_TIMEOUT 50
  33
  34static const struct comedi_lrange range_pci1050_ai = {
  35        3, {
  36                BIP_RANGE(10),
  37                BIP_RANGE(5),
  38                UNI_RANGE(10)
  39        }
  40};
  41
  42static const char range_codes_pci1050_ai[] = { 0x00, 0x10, 0x30 };
  43
  44struct dyna_pci10xx_private {
  45        struct mutex mutex;
  46        unsigned long BADR3;
  47};
  48
  49static int dyna_pci10xx_ai_eoc(struct comedi_device *dev,
  50                               struct comedi_subdevice *s,
  51                               struct comedi_insn *insn,
  52                               unsigned long context)
  53{
  54        unsigned int status;
  55
  56        status = inw_p(dev->iobase);
  57        if (status & BIT(15))
  58                return 0;
  59        return -EBUSY;
  60}
  61
  62static int dyna_pci10xx_insn_read_ai(struct comedi_device *dev,
  63                                     struct comedi_subdevice *s,
  64                                     struct comedi_insn *insn,
  65                                     unsigned int *data)
  66{
  67        struct dyna_pci10xx_private *devpriv = dev->private;
  68        int n;
  69        u16 d = 0;
  70        int ret = 0;
  71        unsigned int chan, range;
  72
  73        /* get the channel number and range */
  74        chan = CR_CHAN(insn->chanspec);
  75        range = range_codes_pci1050_ai[CR_RANGE((insn->chanspec))];
  76
  77        mutex_lock(&devpriv->mutex);
  78        /* convert n samples */
  79        for (n = 0; n < insn->n; n++) {
  80                /* trigger conversion */
  81                smp_mb();
  82                outw_p(0x0000 + range + chan, dev->iobase + 2);
  83                usleep_range(10, 20);
  84
  85                ret = comedi_timeout(dev, s, insn, dyna_pci10xx_ai_eoc, 0);
  86                if (ret)
  87                        break;
  88
  89                /* read data */
  90                d = inw_p(dev->iobase);
  91                /* mask the first 4 bits - EOC bits */
  92                d &= 0x0FFF;
  93                data[n] = d;
  94        }
  95        mutex_unlock(&devpriv->mutex);
  96
  97        /* return the number of samples read/written */
  98        return ret ? ret : n;
  99}
 100
 101/* analog output callback */
 102static int dyna_pci10xx_insn_write_ao(struct comedi_device *dev,
 103                                      struct comedi_subdevice *s,
 104                                      struct comedi_insn *insn,
 105                                      unsigned int *data)
 106{
 107        struct dyna_pci10xx_private *devpriv = dev->private;
 108        int n;
 109
 110        mutex_lock(&devpriv->mutex);
 111        for (n = 0; n < insn->n; n++) {
 112                smp_mb();
 113                /* trigger conversion and write data */
 114                outw_p(data[n], dev->iobase);
 115                usleep_range(10, 20);
 116        }
 117        mutex_unlock(&devpriv->mutex);
 118        return n;
 119}
 120
 121/* digital input bit interface */
 122static int dyna_pci10xx_di_insn_bits(struct comedi_device *dev,
 123                                     struct comedi_subdevice *s,
 124                                     struct comedi_insn *insn,
 125                                     unsigned int *data)
 126{
 127        struct dyna_pci10xx_private *devpriv = dev->private;
 128        u16 d = 0;
 129
 130        mutex_lock(&devpriv->mutex);
 131        smp_mb();
 132        d = inw_p(devpriv->BADR3);
 133        usleep_range(10, 100);
 134
 135        /* on return the data[0] contains output and data[1] contains input */
 136        data[1] = d;
 137        data[0] = s->state;
 138        mutex_unlock(&devpriv->mutex);
 139        return insn->n;
 140}
 141
 142static int dyna_pci10xx_do_insn_bits(struct comedi_device *dev,
 143                                     struct comedi_subdevice *s,
 144                                     struct comedi_insn *insn,
 145                                     unsigned int *data)
 146{
 147        struct dyna_pci10xx_private *devpriv = dev->private;
 148
 149        mutex_lock(&devpriv->mutex);
 150        if (comedi_dio_update_state(s, data)) {
 151                smp_mb();
 152                outw_p(s->state, devpriv->BADR3);
 153                usleep_range(10, 100);
 154        }
 155
 156        data[1] = s->state;
 157        mutex_unlock(&devpriv->mutex);
 158
 159        return insn->n;
 160}
 161
 162static int dyna_pci10xx_auto_attach(struct comedi_device *dev,
 163                                    unsigned long context_unused)
 164{
 165        struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 166        struct dyna_pci10xx_private *devpriv;
 167        struct comedi_subdevice *s;
 168        int ret;
 169
 170        devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
 171        if (!devpriv)
 172                return -ENOMEM;
 173
 174        ret = comedi_pci_enable(dev);
 175        if (ret)
 176                return ret;
 177        dev->iobase = pci_resource_start(pcidev, 2);
 178        devpriv->BADR3 = pci_resource_start(pcidev, 3);
 179
 180        mutex_init(&devpriv->mutex);
 181
 182        ret = comedi_alloc_subdevices(dev, 4);
 183        if (ret)
 184                return ret;
 185
 186        /* analog input */
 187        s = &dev->subdevices[0];
 188        s->type = COMEDI_SUBD_AI;
 189        s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF;
 190        s->n_chan = 16;
 191        s->maxdata = 0x0FFF;
 192        s->range_table = &range_pci1050_ai;
 193        s->insn_read = dyna_pci10xx_insn_read_ai;
 194
 195        /* analog output */
 196        s = &dev->subdevices[1];
 197        s->type = COMEDI_SUBD_AO;
 198        s->subdev_flags = SDF_WRITABLE;
 199        s->n_chan = 1;
 200        s->maxdata = 0x0FFF;
 201        s->range_table = &range_unipolar10;
 202        s->insn_write = dyna_pci10xx_insn_write_ao;
 203
 204        /* digital input */
 205        s = &dev->subdevices[2];
 206        s->type = COMEDI_SUBD_DI;
 207        s->subdev_flags = SDF_READABLE;
 208        s->n_chan = 16;
 209        s->maxdata = 1;
 210        s->range_table = &range_digital;
 211        s->insn_bits = dyna_pci10xx_di_insn_bits;
 212
 213        /* digital output */
 214        s = &dev->subdevices[3];
 215        s->type = COMEDI_SUBD_DO;
 216        s->subdev_flags = SDF_WRITABLE;
 217        s->n_chan = 16;
 218        s->maxdata = 1;
 219        s->range_table = &range_digital;
 220        s->state = 0;
 221        s->insn_bits = dyna_pci10xx_do_insn_bits;
 222
 223        return 0;
 224}
 225
 226static void dyna_pci10xx_detach(struct comedi_device *dev)
 227{
 228        struct dyna_pci10xx_private *devpriv = dev->private;
 229
 230        comedi_pci_detach(dev);
 231        if (devpriv)
 232                mutex_destroy(&devpriv->mutex);
 233}
 234
 235static struct comedi_driver dyna_pci10xx_driver = {
 236        .driver_name    = "dyna_pci10xx",
 237        .module         = THIS_MODULE,
 238        .auto_attach    = dyna_pci10xx_auto_attach,
 239        .detach         = dyna_pci10xx_detach,
 240};
 241
 242static int dyna_pci10xx_pci_probe(struct pci_dev *dev,
 243                                  const struct pci_device_id *id)
 244{
 245        return comedi_pci_auto_config(dev, &dyna_pci10xx_driver,
 246                                      id->driver_data);
 247}
 248
 249static const struct pci_device_id dyna_pci10xx_pci_table[] = {
 250        { PCI_DEVICE(PCI_VENDOR_ID_PLX, 0x1050) },
 251        { 0 }
 252};
 253MODULE_DEVICE_TABLE(pci, dyna_pci10xx_pci_table);
 254
 255static struct pci_driver dyna_pci10xx_pci_driver = {
 256        .name           = "dyna_pci10xx",
 257        .id_table       = dyna_pci10xx_pci_table,
 258        .probe          = dyna_pci10xx_pci_probe,
 259        .remove         = comedi_pci_auto_unconfig,
 260};
 261module_comedi_pci_driver(dyna_pci10xx_driver, dyna_pci10xx_pci_driver);
 262
 263MODULE_LICENSE("GPL");
 264MODULE_AUTHOR("Prashant Shah <pshah.mumbai@gmail.com>");
 265MODULE_DESCRIPTION("Comedi based drivers for Dynalog PCI DAQ cards");
 266