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 range_4_20mA = { 1, {RANGE_mA(4, 20)} };
  94 static const struct comedi_lrange range_0_20mA = { 1, {RANGE_mA(0, 20)} };
  95
  96 static const struct comedi_lrange *const rangelist_726[] = {
  97         &range_unipolar5, &range_unipolar10,
  98         &range_bipolar5, &range_bipolar10,
  99         &range_4_20mA, &range_unknown
 100 };
 101
 102 static const struct comedi_lrange *const rangelist_727[] = {
 103         &range_unipolar5, &range_unipolar10,
 104         &range_bipolar5,
 105         &range_4_20mA
 106 };
 107
 108 static const struct comedi_lrange *const rangelist_728[] = {
 109         &range_unipolar5, &range_unipolar10,
 110         &range_bipolar5, &range_bipolar10,
 111         &range_4_20mA, &range_0_20mA
 112 };
 113
 114 struct pcl726_board {
 115
 116         const char *name;       /*  driver name */
 117         int n_aochan;           /*  num of D/A chans */
 118         int num_of_ranges;      /*  num of ranges */
 119         unsigned int IRQbits;   /*  allowed interrupts */
 120         unsigned int io_range;  /*  len of IO space */
 121         char have_dio;          /*  1=card have DI/DO ports */
 122         int di_hi;              /*  ports for DI/DO operations */
 123         int di_lo;
 124         int do_hi;
 125         int do_lo;
 126         const struct comedi_lrange *const *range_type_list;
 127         /*  list of supported ranges */
 128 };
 129
 130 static const struct pcl726_board boardtypes[] = {
 131         {"pcl726", 6, 6, 0x0000, PCL726_SIZE, 1,
 132          PCL726_DI_HI, PCL726_DI_LO, PCL726_DO_HI, PCL726_DO_LO,
 133          &rangelist_726[0],},
 134         {"pcl727", 12, 4, 0x0000, PCL727_SIZE, 1,
 135          PCL727_DI_HI, PCL727_DI_LO, PCL727_DO_HI, PCL727_DO_LO,
 136          &rangelist_727[0],},
 137         {"pcl728", 2, 6, 0x0000, PCL728_SIZE, 0,
 138          0, 0, 0, 0,
 139          &rangelist_728[0],},
 140         {"acl6126", 6, 5, 0x96e8, PCL726_SIZE, 1,
 141          PCL726_DI_HI, PCL726_DI_LO, PCL726_DO_HI, PCL726_DO_LO,
 142          &rangelist_726[0],},
 143         {"acl6128", 2, 6, 0x0000, PCL728_SIZE, 0,
 144          0, 0, 0, 0,
 145          &rangelist_728[0],},
 146 };
 147
 148 struct pcl726_private {
 149
 150         int bipolar[12];
 151         const struct comedi_lrange *rangelist[12];
 152         unsigned int ao_readback[12];
 153 };
 154
 155 static int pcl726_ao_insn(struct comedi_device *dev, struct comedi_subdevice *s,
 156                           struct comedi_insn *insn, unsigned int *data)
 157 {
 158         struct pcl726_private *devpriv = dev->private;
 159         int hi, lo;
 160         int n;
 161         int chan = CR_CHAN(insn->chanspec);
 162
 163         for (n = 0; n < insn->n; n++) {
 164                 lo = data[n] & 0xff;
 165                 hi = (data[n] >> 8) & 0xf;
 166                 if (devpriv->bipolar[chan])
 167                         hi ^= 0x8;
 168                 /*
 169                  * the programming info did not say which order
 170                  * to write bytes.  switch the order of the next
 171                  * two lines if you get glitches.
 172                  */
 173                 outb(hi, dev->iobase + PCL726_DAC0_HI + 2 * chan);
 174                 outb(lo, dev->iobase + PCL726_DAC0_LO + 2 * chan);
 175                 devpriv->ao_readback[chan] = data[n];
 176         }
 177
 178         return n;
 179 }
 180
 181 static int pcl726_ao_insn_read(struct comedi_device *dev,
 182                                struct comedi_subdevice *s,
 183                                struct comedi_insn *insn, unsigned int *data)
 184 {
 185         struct pcl726_private *devpriv = dev->private;
 186         int chan = CR_CHAN(insn->chanspec);
 187         int n;
 188
 189         for (n = 0; n < insn->n; n++)
 190                 data[n] = devpriv->ao_readback[chan];
 191         return n;
 192 }
 193
 194 static int pcl726_di_insn_bits(struct comedi_device *dev,
 195                                struct comedi_subdevice *s,
 196                                struct comedi_insn *insn, unsigned int *data)
 197 {
 198         const struct pcl726_board *board = comedi_board(dev);
 199
 200         data[1] = inb(dev->iobase + board->di_lo) |
 201             (inb(dev->iobase + board->di_hi) << 8);
 202
 203         return insn->n;
 204 }
 205
 206 static int pcl726_do_insn_bits(struct comedi_device *dev,
 207                                struct comedi_subdevice *s,
 208                                struct comedi_insn *insn, unsigned int *data)
 209 {
 210         const struct pcl726_board *board = comedi_board(dev);
 211
 212         if (data[0]) {
 213                 s->state &= ~data[0];
 214                 s->state |= data[0] & data[1];
 215         }
 216         if (data[1] & 0x00ff)
 217                 outb(s->state & 0xff, dev->iobase + board->do_lo);
 218         if (data[1] & 0xff00)
 219                 outb((s->state >> 8), dev->iobase + board->do_hi);
 220
 221         data[1] = s->state;
 222
 223         return insn->n;
 224 }
 225
 226 static int pcl726_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 227 {
 228         const struct pcl726_board *board = comedi_board(dev);
 229         struct pcl726_private *devpriv;
 230         struct comedi_subdevice *s;
 231         unsigned long iobase;
 232         unsigned int iorange;
 233         int ret, i;
 234 #ifdef ACL6126_IRQ
 235         unsigned int irq;
 236 #endif
 237
 238         iobase = it->options[0];
 239         iorange = board->io_range;
 240         printk(KERN_WARNING "comedi%d: pcl726: board=%s, 0x%03lx ", dev->minor,
 241                board->name, iobase);
 242         if (!request_region(iobase, iorange, "pcl726")) {
 243                 printk(KERN_WARNING "I/O port conflict\n");
 244                 return -EIO;
 245         }
 246
 247         dev->iobase = iobase;
 248
 249         dev->board_name = board->name;
 250
 251         devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL);
 252         if (!devpriv)
 253                 return -ENOMEM;
 254         dev->private = devpriv;
 255
 256         for (i = 0; i < 12; i++) {
 257                 devpriv->bipolar[i] = 0;
 258                 devpriv->rangelist[i] = &range_unknown;
 259         }
 260
 261 #ifdef ACL6126_IRQ
 262         irq = 0;
 263         if (boardtypes[board].IRQbits != 0) {   /* board support IRQ */
 264                 irq = it->options[1];
 265                 devpriv->first_chan = 2;
 266                 if (irq) {      /* we want to use IRQ */
 267                         if (((1 << irq) & boardtypes[board].IRQbits) == 0) {
 268                                 printk(KERN_WARNING
 269                                         ", IRQ %d is out of allowed range,"
 270                                         " DISABLING IT", irq);
 271                                 irq = 0;        /* Bad IRQ */
 272                         } else {
 273                                 if (request_irq(irq, interrupt_pcl818, 0,
 274                                                 "pcl726", dev)) {
 275                                         printk(KERN_WARNING
 276                                                 ", unable to allocate IRQ %d,"
 277                                                 " DISABLING IT", irq);
 278                                         irq = 0;        /* Can't use IRQ */
 279                                 } else {
 280                                         printk(", irq=%d", irq);
 281                                 }
 282                         }
 283                 }
 284         }
 285
 286         dev->irq = irq;
 287 #endif
 288
 289         printk("\n");
 290
 291         ret = comedi_alloc_subdevices(dev, 3);
 292         if (ret)
 293                 return ret;
 294
 295         s = &dev->subdevices[0];
 296         /* ao */
 297         s->type = COMEDI_SUBD_AO;
 298         s->subdev_flags = SDF_WRITABLE | SDF_GROUND;
 299         s->n_chan = board->n_aochan;
 300         s->maxdata = 0xfff;
 301         s->len_chanlist = 1;
 302         s->insn_write = pcl726_ao_insn;
 303         s->insn_read = pcl726_ao_insn_read;
 304         s->range_table_list = devpriv->rangelist;
 305         for (i = 0; i < board->n_aochan; i++) {
 306                 int j;
 307
 308                 j = it->options[2 + 1];
 309                 if ((j < 0) || (j >= board->num_of_ranges)) {
 310                         printk
 311                             ("Invalid range for channel %d! Must be 0<=%d<%d\n",
 312                              i, j, board->num_of_ranges - 1);
 313                         j = 0;
 314                 }
 315                 devpriv->rangelist[i] = board->range_type_list[j];
 316                 if (devpriv->rangelist[i]->range[0].min ==
 317                     -devpriv->rangelist[i]->range[0].max)
 318                         devpriv->bipolar[i] = 1;        /* bipolar range */
 319         }
 320
 321         s = &dev->subdevices[1];
 322         /* di */
 323         if (!board->have_dio) {
 324                 s->type = COMEDI_SUBD_UNUSED;
 325         } else {
 326                 s->type = COMEDI_SUBD_DI;
 327                 s->subdev_flags = SDF_READABLE | SDF_GROUND;
 328                 s->n_chan = 16;
 329                 s->maxdata = 1;
 330                 s->len_chanlist = 1;
 331                 s->insn_bits = pcl726_di_insn_bits;
 332                 s->range_table = &range_digital;
 333         }
 334
 335         s = &dev->subdevices[2];
 336         /* do */
 337         if (!board->have_dio) {
 338                 s->type = COMEDI_SUBD_UNUSED;
 339         } else {
 340                 s->type = COMEDI_SUBD_DO;
 341                 s->subdev_flags = SDF_WRITABLE | SDF_GROUND;
 342                 s->n_chan = 16;
 343                 s->maxdata = 1;
 344                 s->len_chanlist = 1;
 345                 s->insn_bits = pcl726_do_insn_bits;
 346                 s->range_table = &range_digital;
 347         }
 348
 349         return 0;
 350 }
 351
 352 static void pcl726_detach(struct comedi_device *dev)
 353 {
 354         const struct pcl726_board *board = comedi_board(dev);
 355
 356 #ifdef ACL6126_IRQ
 357         if (dev->irq)
 358                 free_irq(dev->irq, dev);
 359 #endif
 360         if (dev->iobase)
 361                 release_region(dev->iobase, board->io_range);
 362 }
 363
 364 static struct comedi_driver pcl726_driver = {
 365         .driver_name    = "pcl726",
 366         .module         = THIS_MODULE,
 367         .attach         = pcl726_attach,
 368         .detach         = pcl726_detach,
 369         .board_name     = &boardtypes[0].name,
 370         .num_names      = ARRAY_SIZE(boardtypes),
 371         .offset         = sizeof(struct pcl726_board),
 372 };
 373 module_comedi_driver(pcl726_driver);
 374
 375 MODULE_AUTHOR("Comedi http://www.comedi.org");
 376 MODULE_DESCRIPTION("Comedi low-level driver");
 377 MODULE_LICENSE("GPL");