linux/drivers/staging/comedi/drivers/dyna_pci10xx.c
<<
>>
Prefs
   1/*
   2 * comedi/drivers/dyna_pci10xx.c
   3 * Copyright (C) 2011 Prashant Shah, pshah.mumbai@gmail.com
   4 *
   5 * This program is free software; you can redistribute it and/or modify
   6 * it under the terms of the GNU General Public License as published by
   7 * the Free Software Foundation; either version 2 of the License, or
   8 * (at your option) any later version.
   9 *
  10 * This program is distributed in the hope that it will be useful,
  11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 * GNU General Public License for more details.
  14 */
  15
  16/*
  17 Driver: dyna_pci10xx
  18 Devices: Dynalog India PCI DAQ Cards, http://www.dynalogindia.com/
  19 Author: Prashant Shah <pshah.mumbai@gmail.com>
  20 Developed at Automation Labs, Chemical Dept., IIT Bombay, India.
  21 Prof. Kannan Moudgalya <kannan@iitb.ac.in>
  22 http://www.iitb.ac.in
  23 Status: Stable
  24 Version: 1.0
  25 Device Supported :
  26 - Dynalog PCI 1050
  27
  28 Notes :
  29 - Dynalog India Pvt. Ltd. does not have a registered PCI Vendor ID and
  30 they are using the PLX Technlogies Vendor ID since that is the PCI Chip used
  31 in the card.
  32 - Dynalog India Pvt. Ltd. has provided the internal register specification for
  33 their cards in their manuals.
  34*/
  35
  36#include <linux/module.h>
  37#include <linux/delay.h>
  38#include <linux/pci.h>
  39#include <linux/mutex.h>
  40
  41#include "../comedidev.h"
  42
  43#define READ_TIMEOUT 50
  44
  45static const struct comedi_lrange range_pci1050_ai = {
  46        3, {
  47                BIP_RANGE(10),
  48                BIP_RANGE(5),
  49                UNI_RANGE(10)
  50        }
  51};
  52
  53static const char range_codes_pci1050_ai[] = { 0x00, 0x10, 0x30 };
  54
  55struct dyna_pci10xx_private {
  56        struct mutex mutex;
  57        unsigned long BADR3;
  58};
  59
  60static int dyna_pci10xx_ai_eoc(struct comedi_device *dev,
  61                               struct comedi_subdevice *s,
  62                               struct comedi_insn *insn,
  63                               unsigned long context)
  64{
  65        unsigned int status;
  66
  67        status = inw_p(dev->iobase);
  68        if (status & (1 << 15))
  69                return 0;
  70        return -EBUSY;
  71}
  72
  73static int dyna_pci10xx_insn_read_ai(struct comedi_device *dev,
  74                        struct comedi_subdevice *s,
  75                        struct comedi_insn *insn, unsigned int *data)
  76{
  77        struct dyna_pci10xx_private *devpriv = dev->private;
  78        int n;
  79        u16 d = 0;
  80        int ret = 0;
  81        unsigned int chan, range;
  82
  83        /* get the channel number and range */
  84        chan = CR_CHAN(insn->chanspec);
  85        range = range_codes_pci1050_ai[CR_RANGE((insn->chanspec))];
  86
  87        mutex_lock(&devpriv->mutex);
  88        /* convert n samples */
  89        for (n = 0; n < insn->n; n++) {
  90                /* trigger conversion */
  91                smp_mb();
  92                outw_p(0x0000 + range + chan, dev->iobase + 2);
  93                udelay(10);
  94
  95                ret = comedi_timeout(dev, s, insn, dyna_pci10xx_ai_eoc, 0);
  96                if (ret)
  97                        break;
  98
  99                /* read data */
 100                d = inw_p(dev->iobase);
 101                /* mask the first 4 bits - EOC bits */
 102                d &= 0x0FFF;
 103                data[n] = d;
 104        }
 105        mutex_unlock(&devpriv->mutex);
 106
 107        /* return the number of samples read/written */
 108        return ret ? ret : n;
 109}
 110
 111/* analog output callback */
 112static int dyna_pci10xx_insn_write_ao(struct comedi_device *dev,
 113                                 struct comedi_subdevice *s,
 114                                 struct comedi_insn *insn, unsigned int *data)
 115{
 116        struct dyna_pci10xx_private *devpriv = dev->private;
 117        int n;
 118        unsigned int chan, range;
 119
 120        chan = CR_CHAN(insn->chanspec);
 121        range = range_codes_pci1050_ai[CR_RANGE((insn->chanspec))];
 122
 123        mutex_lock(&devpriv->mutex);
 124        for (n = 0; n < insn->n; n++) {
 125                smp_mb();
 126                /* trigger conversion and write data */
 127                outw_p(data[n], dev->iobase);
 128                udelay(10);
 129        }
 130        mutex_unlock(&devpriv->mutex);
 131        return n;
 132}
 133
 134/* digital input bit interface */
 135static int dyna_pci10xx_di_insn_bits(struct comedi_device *dev,
 136                              struct comedi_subdevice *s,
 137                              struct comedi_insn *insn, unsigned int *data)
 138{
 139        struct dyna_pci10xx_private *devpriv = dev->private;
 140        u16 d = 0;
 141
 142        mutex_lock(&devpriv->mutex);
 143        smp_mb();
 144        d = inw_p(devpriv->BADR3);
 145        udelay(10);
 146
 147        /* on return the data[0] contains output and data[1] contains input */
 148        data[1] = d;
 149        data[0] = s->state;
 150        mutex_unlock(&devpriv->mutex);
 151        return insn->n;
 152}
 153
 154static int dyna_pci10xx_do_insn_bits(struct comedi_device *dev,
 155                                     struct comedi_subdevice *s,
 156                                     struct comedi_insn *insn,
 157                                     unsigned int *data)
 158{
 159        struct dyna_pci10xx_private *devpriv = dev->private;
 160
 161        mutex_lock(&devpriv->mutex);
 162        if (comedi_dio_update_state(s, data)) {
 163                smp_mb();
 164                outw_p(s->state, devpriv->BADR3);
 165                udelay(10);
 166        }
 167
 168        data[1] = s->state;
 169        mutex_unlock(&devpriv->mutex);
 170
 171        return insn->n;
 172}
 173
 174static int dyna_pci10xx_auto_attach(struct comedi_device *dev,
 175                                              unsigned long context_unused)
 176{
 177        struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 178        struct dyna_pci10xx_private *devpriv;
 179        struct comedi_subdevice *s;
 180        int ret;
 181
 182        devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
 183        if (!devpriv)
 184                return -ENOMEM;
 185
 186        ret = comedi_pci_enable(dev);
 187        if (ret)
 188                return ret;
 189        dev->iobase = pci_resource_start(pcidev, 2);
 190        devpriv->BADR3 = pci_resource_start(pcidev, 3);
 191
 192        mutex_init(&devpriv->mutex);
 193
 194        ret = comedi_alloc_subdevices(dev, 4);
 195        if (ret)
 196                return ret;
 197
 198        /* analog input */
 199        s = &dev->subdevices[0];
 200        s->type = COMEDI_SUBD_AI;
 201        s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF;
 202        s->n_chan = 16;
 203        s->maxdata = 0x0FFF;
 204        s->range_table = &range_pci1050_ai;
 205        s->len_chanlist = 16;
 206        s->insn_read = dyna_pci10xx_insn_read_ai;
 207
 208        /* analog output */
 209        s = &dev->subdevices[1];
 210        s->type = COMEDI_SUBD_AO;
 211        s->subdev_flags = SDF_WRITABLE;
 212        s->n_chan = 16;
 213        s->maxdata = 0x0FFF;
 214        s->range_table = &range_unipolar10;
 215        s->len_chanlist = 16;
 216        s->insn_write = dyna_pci10xx_insn_write_ao;
 217
 218        /* digital input */
 219        s = &dev->subdevices[2];
 220        s->type = COMEDI_SUBD_DI;
 221        s->subdev_flags = SDF_READABLE;
 222        s->n_chan = 16;
 223        s->maxdata = 1;
 224        s->range_table = &range_digital;
 225        s->len_chanlist = 16;
 226        s->insn_bits = dyna_pci10xx_di_insn_bits;
 227
 228        /* digital output */
 229        s = &dev->subdevices[3];
 230        s->type = COMEDI_SUBD_DO;
 231        s->subdev_flags = SDF_WRITABLE;
 232        s->n_chan = 16;
 233        s->maxdata = 1;
 234        s->range_table = &range_digital;
 235        s->len_chanlist = 16;
 236        s->state = 0;
 237        s->insn_bits = dyna_pci10xx_do_insn_bits;
 238
 239        return 0;
 240}
 241
 242static void dyna_pci10xx_detach(struct comedi_device *dev)
 243{
 244        struct dyna_pci10xx_private *devpriv = dev->private;
 245
 246        comedi_pci_detach(dev);
 247        if (devpriv)
 248                mutex_destroy(&devpriv->mutex);
 249}
 250
 251static struct comedi_driver dyna_pci10xx_driver = {
 252        .driver_name    = "dyna_pci10xx",
 253        .module         = THIS_MODULE,
 254        .auto_attach    = dyna_pci10xx_auto_attach,
 255        .detach         = dyna_pci10xx_detach,
 256};
 257
 258static int dyna_pci10xx_pci_probe(struct pci_dev *dev,
 259                                  const struct pci_device_id *id)
 260{
 261        return comedi_pci_auto_config(dev, &dyna_pci10xx_driver,
 262                                      id->driver_data);
 263}
 264
 265static const struct pci_device_id dyna_pci10xx_pci_table[] = {
 266        { PCI_DEVICE(PCI_VENDOR_ID_PLX, 0x1050) },
 267        { 0 }
 268};
 269MODULE_DEVICE_TABLE(pci, dyna_pci10xx_pci_table);
 270
 271static struct pci_driver dyna_pci10xx_pci_driver = {
 272        .name           = "dyna_pci10xx",
 273        .id_table       = dyna_pci10xx_pci_table,
 274        .probe          = dyna_pci10xx_pci_probe,
 275        .remove         = comedi_pci_auto_unconfig,
 276};
 277module_comedi_pci_driver(dyna_pci10xx_driver, dyna_pci10xx_pci_driver);
 278
 279MODULE_LICENSE("GPL");
 280MODULE_AUTHOR("Prashant Shah <pshah.mumbai@gmail.com>");
 281MODULE_DESCRIPTION("Comedi based drivers for Dynalog PCI DAQ cards");
 282
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.