LXR linux/drivers/staging/comedi/drivers/dyna

   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 * Description: Dynalog India PCI DAQ Cards, http://www.dynalogindia.com/
  19 * Devices: [Dynalog] PCI-1050 (dyna_pci1050)
  20 * Author: Prashant Shah <pshah.mumbai@gmail.com>
  21 * Status: Stable
  22 *
  23 * Developed at Automation Labs, Chemical Dept., IIT Bombay, India.
  24 * Prof. Kannan Moudgalya <kannan@iitb.ac.in>
  25 * http://www.iitb.ac.in
  26 *
  27 * Notes :
  28 * - Dynalog India Pvt. Ltd. does not have a registered PCI Vendor ID and
  29 *   they are using the PLX Technlogies Vendor ID since that is the PCI Chip
  30 *   used in the card.
  31 * - Dynalog India Pvt. Ltd. has provided the internal register specification
  32 *   for their cards in their manuals.
  33 */
  34
  35#include <linux/module.h>
  36#include <linux/delay.h>
  37#include <linux/mutex.h>
  38
  39#include "../comedi_pci.h"
  40
  41#define READ_TIMEOUT 50
  42
  43static const struct comedi_lrange range_pci1050_ai = {
  44        3, {
  45                BIP_RANGE(10),
  46                BIP_RANGE(5),
  47                UNI_RANGE(10)
  48        }
  49};
  50
  51static const char range_codes_pci1050_ai[] = { 0x00, 0x10, 0x30 };
  52
  53struct dyna_pci10xx_private {
  54        struct mutex mutex;
  55        unsigned long BADR3;
  56};
  57
  58static int dyna_pci10xx_ai_eoc(struct comedi_device *dev,
  59                               struct comedi_subdevice *s,
  60                               struct comedi_insn *insn,
  61                               unsigned long context)
  62{
  63        unsigned int status;
  64
  65        status = inw_p(dev->iobase);
  66        if (status & (1 << 15))
  67                return 0;
  68        return -EBUSY;
  69}
  70
  71static int dyna_pci10xx_insn_read_ai(struct comedi_device *dev,
  72                                     struct comedi_subdevice *s,
  73                                     struct comedi_insn *insn,
  74                                     unsigned int *data)
  75{
  76        struct dyna_pci10xx_private *devpriv = dev->private;
  77        int n;
  78        u16 d = 0;
  79        int ret = 0;
  80        unsigned int chan, range;
  81
  82        /* get the channel number and range */
  83        chan = CR_CHAN(insn->chanspec);
  84        range = range_codes_pci1050_ai[CR_RANGE((insn->chanspec))];
  85
  86        mutex_lock(&devpriv->mutex);
  87        /* convert n samples */
  88        for (n = 0; n < insn->n; n++) {
  89                /* trigger conversion */
  90                smp_mb();
  91                outw_p(0x0000 + range + chan, dev->iobase + 2);
  92                usleep_range(10, 20);
  93
  94                ret = comedi_timeout(dev, s, insn, dyna_pci10xx_ai_eoc, 0);
  95                if (ret)
  96                        break;
  97
  98                /* read data */
  99                d = inw_p(dev->iobase);
 100                /* mask the first 4 bits - EOC bits */
 101                d &= 0x0FFF;
 102                data[n] = d;
 103        }
 104        mutex_unlock(&devpriv->mutex);
 105
 106        /* return the number of samples read/written */
 107        return ret ? ret : n;
 108}
 109
 110/* analog output callback */
 111static int dyna_pci10xx_insn_write_ao(struct comedi_device *dev,
 112                                      struct comedi_subdevice *s,
 113                                      struct comedi_insn *insn,
 114                                      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                usleep_range(10, 20);
 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,
 138                                     unsigned int *data)
 139{
 140        struct dyna_pci10xx_private *devpriv = dev->private;
 141        u16 d = 0;
 142
 143        mutex_lock(&devpriv->mutex);
 144        smp_mb();
 145        d = inw_p(devpriv->BADR3);
 146        usleep_range(10, 100);
 147
 148        /* on return the data[0] contains output and data[1] contains input */
 149        data[1] = d;
 150        data[0] = s->state;
 151        mutex_unlock(&devpriv->mutex);
 152        return insn->n;
 153}
 154
 155static int dyna_pci10xx_do_insn_bits(struct comedi_device *dev,
 156                                     struct comedi_subdevice *s,
 157                                     struct comedi_insn *insn,
 158                                     unsigned int *data)
 159{
 160        struct dyna_pci10xx_private *devpriv = dev->private;
 161
 162        mutex_lock(&devpriv->mutex);
 163        if (comedi_dio_update_state(s, data)) {
 164                smp_mb();
 165                outw_p(s->state, devpriv->BADR3);
 166                usleep_range(10, 100);
 167        }
 168
 169        data[1] = s->state;
 170        mutex_unlock(&devpriv->mutex);
 171
 172        return insn->n;
 173}
 174
 175static int dyna_pci10xx_auto_attach(struct comedi_device *dev,
 176                                    unsigned long context_unused)
 177{
 178        struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 179        struct dyna_pci10xx_private *devpriv;
 180        struct comedi_subdevice *s;
 181        int ret;
 182
 183        devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
 184        if (!devpriv)
 185                return -ENOMEM;
 186
 187        ret = comedi_pci_enable(dev);
 188        if (ret)
 189                return ret;
 190        dev->iobase = pci_resource_start(pcidev, 2);
 191        devpriv->BADR3 = pci_resource_start(pcidev, 3);
 192
 193        mutex_init(&devpriv->mutex);
 194
 195        ret = comedi_alloc_subdevices(dev, 4);
 196        if (ret)
 197                return ret;
 198
 199        /* analog input */
 200        s = &dev->subdevices[0];
 201        s->type = COMEDI_SUBD_AI;
 202        s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF;
 203        s->n_chan = 16;
 204        s->maxdata = 0x0FFF;
 205        s->range_table = &range_pci1050_ai;
 206        s->len_chanlist = 16;
 207        s->insn_read = dyna_pci10xx_insn_read_ai;
 208
 209        /* analog output */
 210        s = &dev->subdevices[1];
 211        s->type = COMEDI_SUBD_AO;
 212        s->subdev_flags = SDF_WRITABLE;
 213        s->n_chan = 16;
 214        s->maxdata = 0x0FFF;
 215        s->range_table = &range_unipolar10;
 216        s->len_chanlist = 16;
 217        s->insn_write = dyna_pci10xx_insn_write_ao;
 218
 219        /* digital input */
 220        s = &dev->subdevices[2];
 221        s->type = COMEDI_SUBD_DI;
 222        s->subdev_flags = SDF_READABLE;
 223        s->n_chan = 16;
 224        s->maxdata = 1;
 225        s->range_table = &range_digital;
 226        s->len_chanlist = 16;
 227        s->insn_bits = dyna_pci10xx_di_insn_bits;
 228
 229        /* digital output */
 230        s = &dev->subdevices[3];
 231        s->type = COMEDI_SUBD_DO;
 232        s->subdev_flags = SDF_WRITABLE;
 233        s->n_chan = 16;
 234        s->maxdata = 1;
 235        s->range_table = &range_digital;
 236        s->len_chanlist = 16;
 237        s->state = 0;
 238        s->insn_bits = dyna_pci10xx_do_insn_bits;
 239
 240        return 0;
 241}
 242
 243static void dyna_pci10xx_detach(struct comedi_device *dev)
 244{
 245        struct dyna_pci10xx_private *devpriv = dev->private;
 246
 247        comedi_pci_detach(dev);
 248        if (devpriv)
 249                mutex_destroy(&devpriv->mutex);
 250}
 251
 252static struct comedi_driver dyna_pci10xx_driver = {
 253        .driver_name    = "dyna_pci10xx",
 254        .module         = THIS_MODULE,
 255        .auto_attach    = dyna_pci10xx_auto_attach,
 256        .detach         = dyna_pci10xx_detach,
 257};
 258
 259static int dyna_pci10xx_pci_probe(struct pci_dev *dev,
 260                                  const struct pci_device_id *id)
 261{
 262        return comedi_pci_auto_config(dev, &dyna_pci10xx_driver,
 263                                      id->driver_data);
 264}
 265
 266static const struct pci_device_id dyna_pci10xx_pci_table[] = {
 267        { PCI_DEVICE(PCI_VENDOR_ID_PLX, 0x1050) },
 268        { 0 }
 269};
 270MODULE_DEVICE_TABLE(pci, dyna_pci10xx_pci_table);
 271
 272static struct pci_driver dyna_pci10xx_pci_driver = {
 273        .name           = "dyna_pci10xx",
 274        .id_table       = dyna_pci10xx_pci_table,
 275        .probe          = dyna_pci10xx_pci_probe,
 276        .remove         = comedi_pci_auto_unconfig,
 277};
 278module_comedi_pci_driver(dyna_pci10xx_driver, dyna_pci10xx_pci_driver);
 279
 280MODULE_LICENSE("GPL");
 281MODULE_AUTHOR("Prashant Shah <pshah.mumbai@gmail.com>");
 282MODULE_DESCRIPTION("Comedi based drivers for Dynalog PCI DAQ cards");
 283