drivers/staging/comedi/drivers/pcl726.c

   1 /*
   2     comedi/drivers/pcl726.c
   3
   4     hardware driver for Advantech cards:
   5      card:   PCL-726, PCL-727, PCL-728
   6      driver: pcl726,  pcl727,  pcl728
   7     and for ADLink cards:
   8      card:   ACL-6126, ACL-6128
   9      driver: acl6126,  acl6128
  10
  11     COMEDI - Linux Control and Measurement Device Interface
  12     Copyright (C) 1998 David A. Schleef <ds@schleef.org>
  13
  14     This program is free software; you can redistribute it and/or modify
  15     it under the terms of the GNU General Public License as published by
  16     the Free Software Foundation; either version 2 of the License, or
  17     (at your option) any later version.
  18
  19     This program is distributed in the hope that it will be useful,
  20     but WITHOUT ANY WARRANTY; without even the implied warranty of
  21     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22     GNU General Public License for more details.
  23
  24     You should have received a copy of the GNU General Public License
  25     along with this program; if not, write to the Free Software
  26     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27
  28 */
  29 /*
  30 Driver: pcl726
  31 Description: Advantech PCL-726 & compatibles
  32 Author: ds
  33 Status: untested
  34 Devices: [Advantech] PCL-726 (pcl726), PCL-727 (pcl727), PCL-728 (pcl728),
  35   [ADLink] ACL-6126 (acl6126), ACL-6128 (acl6128)
  36
  37 Interrupts are not supported.
  38
  39     Options for PCL-726:
  40      [0] - IO Base
  41      [2]...[7] - D/A output range for channel 1-6:
  42                 0: 0-5V, 1: 0-10V, 2: +/-5V, 3: +/-10V,
  43                 4: 4-20mA, 5: unknown (external reference)
  44
  45     Options for PCL-727:
  46      [0] - IO Base
  47      [2]...[13] - D/A output range for channel 1-12:
  48                 0: 0-5V, 1: 0-10V, 2: +/-5V,
  49                 3: 4-20mA
  50
  51     Options for PCL-728 and ACL-6128:
  52      [0] - IO Base
  53      [2], [3] - D/A output range for channel 1 and 2:
  54                 0: 0-5V, 1: 0-10V, 2: +/-5V, 3: +/-10V,
  55                 4: 4-20mA, 5: 0-20mA
  56
  57     Options for ACL-6126:
  58      [0] - IO Base
  59      [1] - IRQ (0=disable, 3, 5, 6, 7, 9, 10, 11, 12, 15) (currently ignored)
  60      [2]...[7] - D/A output range for channel 1-6:
  61                 0: 0-5V, 1: 0-10V, 2: +/-5V, 3: +/-10V,
  62                 4: 4-20mA
  63 */
  64
  65 /*
  66     Thanks to Circuit Specialists for having programming info (!) on
  67     their web page.  (http://www.cir.com/)
  68 */
  69
  70 #include "../comedidev.h"
  71
  72 #include <linux/ioport.h>
  73
  74 #undef ACL6126_IRQ              /* no interrupt support (yet) */
  75
  76 #define PCL726_SIZE 16
  77 #define PCL727_SIZE 32
  78 #define PCL728_SIZE 8
  79
  80 #define PCL726_DAC0_HI 0
  81 #define PCL726_DAC0_LO 1
  82
  83 #define PCL726_DO_HI 12
  84 #define PCL726_DO_LO 13
  85 #define PCL726_DI_HI 14
  86 #define PCL726_DI_LO 15
  87
  88 #define PCL727_DO_HI 24
  89 #define PCL727_DO_LO 25
  90 #define PCL727_DI_HI  0
  91 #define PCL727_DI_LO  1
  92
  93 static const struct comedi_lrange *const rangelist_726[] = {
  94         &range_unipolar5, &range_unipolar10,
  95         &range_bipolar5, &range_bipolar10,
  96         &range_4_20mA, &range_unknown
  97 };
  98
  99 static const struct comedi_lrange *const rangelist_727[] = {
 100         &range_unipolar5, &range_unipolar10,
 101         &range_bipolar5,
 102         &range_4_20mA
 103 };
 104
 105 static const struct comedi_lrange *const rangelist_728[] = {
 106         &range_unipolar5, &range_unipolar10,
 107         &range_bipolar5, &range_bipolar10,
 108         &range_4_20mA, &range_0_20mA
 109 };
 110
 111 struct pcl726_board {
 112
 113         const char *name;       /*  driver name */
 114         int n_aochan;           /*  num of D/A chans */
 115         int num_of_ranges;      /*  num of ranges */
 116         unsigned int IRQbits;   /*  allowed interrupts */
 117         unsigned int io_range;  /*  len of IO space */
 118         char have_dio;          /*  1=card have DI/DO ports */
 119         int di_hi;              /*  ports for DI/DO operations */
 120         int di_lo;
 121         int do_hi;
 122         int do_lo;
 123         const struct comedi_lrange *const *range_type_list;
 124         /*  list of supported ranges */
 125 };
 126
 127 static const struct pcl726_board boardtypes[] = {
 128         {"pcl726", 6, 6, 0x0000, PCL726_SIZE, 1,
 129          PCL726_DI_HI, PCL726_DI_LO, PCL726_DO_HI, PCL726_DO_LO,
 130          &rangelist_726[0],},
 131         {"pcl727", 12, 4, 0x0000, PCL727_SIZE, 1,
 132          PCL727_DI_HI, PCL727_DI_LO, PCL727_DO_HI, PCL727_DO_LO,
 133          &rangelist_727[0],},
 134         {"pcl728", 2, 6, 0x0000, PCL728_SIZE, 0,
 135          0, 0, 0, 0,
 136          &rangelist_728[0],},
 137         {"acl6126", 6, 5, 0x96e8, PCL726_SIZE, 1,
 138          PCL726_DI_HI, PCL726_DI_LO, PCL726_DO_HI, PCL726_DO_LO,
 139          &rangelist_726[0],},
 140         {"acl6128", 2, 6, 0x0000, PCL728_SIZE, 0,
 141          0, 0, 0, 0,
 142          &rangelist_728[0],},
 143 };
 144
 145 struct pcl726_private {
 146
 147         int bipolar[12];
 148         const struct comedi_lrange *rangelist[12];
 149         unsigned int ao_readback[12];
 150 };
 151
 152 static int pcl726_ao_insn(struct comedi_device *dev, struct comedi_subdevice *s,
 153                           struct comedi_insn *insn, unsigned int *data)
 154 {
 155         struct pcl726_private *devpriv = dev->private;
 156         int hi, lo;
 157         int n;
 158         int chan = CR_CHAN(insn->chanspec);
 159
 160         for (n = 0; n < insn->n; n++) {
 161                 lo = data[n] & 0xff;
 162                 hi = (data[n] >> 8) & 0xf;
 163                 if (devpriv->bipolar[chan])
 164                         hi ^= 0x8;
 165                 /*
 166                  * the programming info did not say which order
 167                  * to write bytes.  switch the order of the next
 168                  * two lines if you get glitches.
 169                  */
 170                 outb(hi, dev->iobase + PCL726_DAC0_HI + 2 * chan);
 171                 outb(lo, dev->iobase + PCL726_DAC0_LO + 2 * chan);
 172                 devpriv->ao_readback[chan] = data[n];
 173         }
 174
 175         return n;
 176 }
 177
 178 static int pcl726_ao_insn_read(struct comedi_device *dev,
 179                                struct comedi_subdevice *s,
 180                                struct comedi_insn *insn, unsigned int *data)
 181 {
 182         struct pcl726_private *devpriv = dev->private;
 183         int chan = CR_CHAN(insn->chanspec);
 184         int n;
 185
 186         for (n = 0; n < insn->n; n++)
 187                 data[n] = devpriv->ao_readback[chan];
 188         return n;
 189 }
 190
 191 static int pcl726_di_insn_bits(struct comedi_device *dev,
 192                                struct comedi_subdevice *s,
 193                                struct comedi_insn *insn, unsigned int *data)
 194 {
 195         const struct pcl726_board *board = comedi_board(dev);
 196
 197         data[1] = inb(dev->iobase + board->di_lo) |
 198             (inb(dev->iobase + board->di_hi) << 8);
 199
 200         return insn->n;
 201 }
 202
 203 static int pcl726_do_insn_bits(struct comedi_device *dev,
 204                                struct comedi_subdevice *s,
 205                                struct comedi_insn *insn, unsigned int *data)
 206 {
 207         const struct pcl726_board *board = comedi_board(dev);
 208
 209         if (data[0]) {
 210                 s->state &= ~data[0];
 211                 s->state |= data[0] & data[1];
 212         }
 213         if (data[1] & 0x00ff)
 214                 outb(s->state & 0xff, dev->iobase + board->do_lo);
 215         if (data[1] & 0xff00)
 216                 outb((s->state >> 8), dev->iobase + board->do_hi);
 217
 218         data[1] = s->state;
 219
 220         return insn->n;
 221 }
 222
 223 static int pcl726_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 224 {
 225         const struct pcl726_board *board = comedi_board(dev);
 226         struct pcl726_private *devpriv;
 227         struct comedi_subdevice *s;
 228         int ret, i;
 229 #ifdef ACL6126_IRQ
 230         unsigned int irq;
 231 #endif
 232
 233         ret = comedi_request_region(dev, it->options[0], board->io_range);
 234         if (ret)
 235                 return ret;
 236
 237         devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL);
 238         if (!devpriv)
 239                 return -ENOMEM;
 240         dev->private = devpriv;
 241
 242         for (i = 0; i < 12; i++) {
 243                 devpriv->bipolar[i] = 0;
 244                 devpriv->rangelist[i] = &range_unknown;
 245         }
 246
 247 #ifdef ACL6126_IRQ
 248         irq = 0;
 249         if (boardtypes[board].IRQbits != 0) {   /* board support IRQ */
 250                 irq = it->options[1];
 251                 devpriv->first_chan = 2;
 252                 if (irq) {      /* we want to use IRQ */
 253                         if (((1 << irq) & boardtypes[board].IRQbits) == 0) {
 254                                 printk(KERN_WARNING
 255                                         ", IRQ %d is out of allowed range,"
 256                                         " DISABLING IT", irq);
 257                                 irq = 0;        /* Bad IRQ */
 258                         } else {
 259                                 if (request_irq(irq, interrupt_pcl818, 0,
 260                                                 dev->board_name, dev)) {
 261                                         printk(KERN_WARNING
 262                                                 ", unable to allocate IRQ %d,"
 263                                                 " DISABLING IT", irq);
 264                                         irq = 0;        /* Can't use IRQ */
 265                                 } else {
 266                                         printk(", irq=%d", irq);
 267                                 }
 268                         }
 269                 }
 270         }
 271
 272         dev->irq = irq;
 273 #endif
 274
 275         printk("\n");
 276
 277         ret = comedi_alloc_subdevices(dev, 3);
 278         if (ret)
 279                 return ret;
 280
 281         s = &dev->subdevices[0];
 282         /* ao */
 283         s->type = COMEDI_SUBD_AO;
 284         s->subdev_flags = SDF_WRITABLE | SDF_GROUND;
 285         s->n_chan = board->n_aochan;
 286         s->maxdata = 0xfff;
 287         s->len_chanlist = 1;
 288         s->insn_write = pcl726_ao_insn;
 289         s->insn_read = pcl726_ao_insn_read;
 290         s->range_table_list = devpriv->rangelist;
 291         for (i = 0; i < board->n_aochan; i++) {
 292                 int j;
 293
 294                 j = it->options[2 + 1];
 295                 if ((j < 0) || (j >= board->num_of_ranges)) {
 296                         printk
 297                             ("Invalid range for channel %d! Must be 0<=%d<%d\n",
 298                              i, j, board->num_of_ranges - 1);
 299                         j = 0;
 300                 }
 301                 devpriv->rangelist[i] = board->range_type_list[j];
 302                 if (devpriv->rangelist[i]->range[0].min ==
 303                     -devpriv->rangelist[i]->range[0].max)
 304                         devpriv->bipolar[i] = 1;        /* bipolar range */
 305         }
 306
 307         s = &dev->subdevices[1];
 308         /* di */
 309         if (!board->have_dio) {
 310                 s->type = COMEDI_SUBD_UNUSED;
 311         } else {
 312                 s->type = COMEDI_SUBD_DI;
 313                 s->subdev_flags = SDF_READABLE | SDF_GROUND;
 314                 s->n_chan = 16;
 315                 s->maxdata = 1;
 316                 s->len_chanlist = 1;
 317                 s->insn_bits = pcl726_di_insn_bits;
 318                 s->range_table = &range_digital;
 319         }
 320
 321         s = &dev->subdevices[2];
 322         /* do */
 323         if (!board->have_dio) {
 324                 s->type = COMEDI_SUBD_UNUSED;
 325         } else {
 326                 s->type = COMEDI_SUBD_DO;
 327                 s->subdev_flags = SDF_WRITABLE | SDF_GROUND;
 328                 s->n_chan = 16;
 329                 s->maxdata = 1;
 330                 s->len_chanlist = 1;
 331                 s->insn_bits = pcl726_do_insn_bits;
 332                 s->range_table = &range_digital;
 333         }
 334
 335         return 0;
 336 }
 337
 338 static struct comedi_driver pcl726_driver = {
 339         .driver_name    = "pcl726",
 340         .module         = THIS_MODULE,
 341         .attach         = pcl726_attach,
 342         .detach         = comedi_legacy_detach,
 343         .board_name     = &boardtypes[0].name,
 344         .num_names      = ARRAY_SIZE(boardtypes),
 345         .offset         = sizeof(struct pcl726_board),
 346 };
 347 module_comedi_driver(pcl726_driver);
 348
 349 MODULE_AUTHOR("Comedi http://www.comedi.org");
 350 MODULE_DESCRIPTION("Comedi low-level driver");
 351 MODULE_LICENSE("GPL");