root/drivers/staging/comedi/drivers/pcl726.c

DEFINITIONS

1. pcl726_intr_insn_bits
2. pcl726_intr_cmdtest
3. pcl726_intr_cmd
4. pcl726_intr_cancel
5. pcl726_interrupt
6. pcl726_ao_insn_write
7. pcl726_di_insn_bits
8. pcl726_do_insn_bits
9. pcl726_attach

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * pcl726.c
   4  * Comedi driver for 6/12-Channel D/A Output and DIO cards
   5  *
   6  * COMEDI - Linux Control and Measurement Device Interface
   7  * Copyright (C) 1998 David A. Schleef <ds@schleef.org>
   8  */
   9 
  10 /*
  11  * Driver: pcl726
  12  * Description: Advantech PCL-726 & compatibles
  13  * Author: David A. Schleef <ds@schleef.org>
  14  * Status: untested
  15  * Devices: [Advantech] PCL-726 (pcl726), PCL-727 (pcl727), PCL-728 (pcl728),
  16  *   [ADLink] ACL-6126 (acl6126), ACL-6128 (acl6128)
  17  *
  18  * Configuration Options:
  19  *   [0]  - IO Base
  20  *   [1]  - IRQ (ACL-6126 only)
  21  *   [2]  - D/A output range for channel 0
  22  *   [3]  - D/A output range for channel 1
  23  *
  24  * Boards with > 2 analog output channels:
  25  *   [4]  - D/A output range for channel 2
  26  *   [5]  - D/A output range for channel 3
  27  *   [6]  - D/A output range for channel 4
  28  *   [7]  - D/A output range for channel 5
  29  *
  30  * Boards with > 6 analog output channels:
  31  *   [8]  - D/A output range for channel 6
  32  *   [9]  - D/A output range for channel 7
  33  *   [10] - D/A output range for channel 8
  34  *   [11] - D/A output range for channel 9
  35  *   [12] - D/A output range for channel 10
  36  *   [13] - D/A output range for channel 11
  37  *
  38  * For PCL-726 the D/A output ranges are:
  39  *   0: 0-5V, 1: 0-10V, 2: +/-5V, 3: +/-10V, 4: 4-20mA, 5: unknown
  40  *
  41  * For PCL-727:
  42  *   0: 0-5V, 1: 0-10V, 2: +/-5V, 3: 4-20mA
  43  *
  44  * For PCL-728 and ACL-6128:
  45  *   0: 0-5V, 1: 0-10V, 2: +/-5V, 3: +/-10V, 4: 4-20mA, 5: 0-20mA
  46  *
  47  * For ACL-6126:
  48  *   0: 0-5V, 1: 0-10V, 2: +/-5V, 3: +/-10V, 4: 4-20mA
  49  */
  50 
  51 #include <linux/module.h>
  52 #include <linux/interrupt.h>
  53 
  54 #include "../comedidev.h"
  55 
  56 #define PCL726_AO_MSB_REG(x)    (0x00 + ((x) * 2))
  57 #define PCL726_AO_LSB_REG(x)    (0x01 + ((x) * 2))
  58 #define PCL726_DO_MSB_REG       0x0c
  59 #define PCL726_DO_LSB_REG       0x0d
  60 #define PCL726_DI_MSB_REG       0x0e
  61 #define PCL726_DI_LSB_REG       0x0f
  62 
  63 #define PCL727_DI_MSB_REG       0x00
  64 #define PCL727_DI_LSB_REG       0x01
  65 #define PCL727_DO_MSB_REG       0x18
  66 #define PCL727_DO_LSB_REG       0x19
  67 
  68 static const struct comedi_lrange *const rangelist_726[] = {
  69         &range_unipolar5,
  70         &range_unipolar10,
  71         &range_bipolar5,
  72         &range_bipolar10,
  73         &range_4_20mA,
  74         &range_unknown
  75 };
  76 
  77 static const struct comedi_lrange *const rangelist_727[] = {
  78         &range_unipolar5,
  79         &range_unipolar10,
  80         &range_bipolar5,
  81         &range_4_20mA
  82 };
  83 
  84 static const struct comedi_lrange *const rangelist_728[] = {
  85         &range_unipolar5,
  86         &range_unipolar10,
  87         &range_bipolar5,
  88         &range_bipolar10,
  89         &range_4_20mA,
  90         &range_0_20mA
  91 };
  92 
  93 struct pcl726_board {
  94         const char *name;
  95         unsigned long io_len;
  96         unsigned int irq_mask;
  97         const struct comedi_lrange *const *ao_ranges;
  98         int ao_num_ranges;
  99         int ao_nchan;
 100         unsigned int have_dio:1;
 101         unsigned int is_pcl727:1;
 102 };
 103 
 104 static const struct pcl726_board pcl726_boards[] = {
 105         {
 106                 .name           = "pcl726",
 107                 .io_len         = 0x10,
 108                 .ao_ranges      = &rangelist_726[0],
 109                 .ao_num_ranges  = ARRAY_SIZE(rangelist_726),
 110                 .ao_nchan       = 6,
 111                 .have_dio       = 1,
 112         }, {
 113                 .name           = "pcl727",
 114                 .io_len         = 0x20,
 115                 .ao_ranges      = &rangelist_727[0],
 116                 .ao_num_ranges  = ARRAY_SIZE(rangelist_727),
 117                 .ao_nchan       = 12,
 118                 .have_dio       = 1,
 119                 .is_pcl727      = 1,
 120         }, {
 121                 .name           = "pcl728",
 122                 .io_len         = 0x08,
 123                 .ao_num_ranges  = ARRAY_SIZE(rangelist_728),
 124                 .ao_ranges      = &rangelist_728[0],
 125                 .ao_nchan       = 2,
 126         }, {
 127                 .name           = "acl6126",
 128                 .io_len         = 0x10,
 129                 .irq_mask       = 0x96e8,
 130                 .ao_num_ranges  = ARRAY_SIZE(rangelist_726),
 131                 .ao_ranges      = &rangelist_726[0],
 132                 .ao_nchan       = 6,
 133                 .have_dio       = 1,
 134         }, {
 135                 .name           = "acl6128",
 136                 .io_len         = 0x08,
 137                 .ao_num_ranges  = ARRAY_SIZE(rangelist_728),
 138                 .ao_ranges      = &rangelist_728[0],
 139                 .ao_nchan       = 2,
 140         },
 141 };
 142 
 143 struct pcl726_private {
 144         const struct comedi_lrange *rangelist[12];
 145         unsigned int cmd_running:1;
 146 };
 147 
 148 static int pcl726_intr_insn_bits(struct comedi_device *dev,
 149                                  struct comedi_subdevice *s,
 150                                  struct comedi_insn *insn,
 151                                  unsigned int *data)
 152 {
 153         data[1] = 0;
 154         return insn->n;
 155 }
 156 
 157 static int pcl726_intr_cmdtest(struct comedi_device *dev,
 158                                struct comedi_subdevice *s,
 159                                struct comedi_cmd *cmd)
 160 {
 161         int err = 0;
 162 
 163         /* Step 1 : check if triggers are trivially valid */
 164 
 165         err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW);
 166         err |= comedi_check_trigger_src(&cmd->scan_begin_src, TRIG_EXT);
 167         err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_FOLLOW);
 168         err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
 169         err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_NONE);
 170 
 171         if (err)
 172                 return 1;
 173 
 174         /* Step 2a : make sure trigger sources are unique */
 175         /* Step 2b : and mutually compatible */
 176 
 177         /* Step 3: check if arguments are trivially valid */
 178 
 179         err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
 180         err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
 181         err |= comedi_check_trigger_arg_is(&cmd->convert_arg, 0);
 182         err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
 183                                            cmd->chanlist_len);
 184         err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
 185 
 186         if (err)
 187                 return 3;
 188 
 189         /* Step 4: fix up any arguments */
 190 
 191         /* Step 5: check channel list if it exists */
 192 
 193         return 0;
 194 }
 195 
 196 static int pcl726_intr_cmd(struct comedi_device *dev,
 197                            struct comedi_subdevice *s)
 198 {
 199         struct pcl726_private *devpriv = dev->private;
 200 
 201         devpriv->cmd_running = 1;
 202 
 203         return 0;
 204 }
 205 
 206 static int pcl726_intr_cancel(struct comedi_device *dev,
 207                               struct comedi_subdevice *s)
 208 {
 209         struct pcl726_private *devpriv = dev->private;
 210 
 211         devpriv->cmd_running = 0;
 212 
 213         return 0;
 214 }
 215 
 216 static irqreturn_t pcl726_interrupt(int irq, void *d)
 217 {
 218         struct comedi_device *dev = d;
 219         struct comedi_subdevice *s = dev->read_subdev;
 220         struct pcl726_private *devpriv = dev->private;
 221 
 222         if (devpriv->cmd_running) {
 223                 pcl726_intr_cancel(dev, s);
 224 
 225                 comedi_buf_write_samples(s, &s->state, 1);
 226                 comedi_handle_events(dev, s);
 227         }
 228 
 229         return IRQ_HANDLED;
 230 }
 231 
 232 static int pcl726_ao_insn_write(struct comedi_device *dev,
 233                                 struct comedi_subdevice *s,
 234                                 struct comedi_insn *insn,
 235                                 unsigned int *data)
 236 {
 237         unsigned int chan = CR_CHAN(insn->chanspec);
 238         unsigned int range = CR_RANGE(insn->chanspec);
 239         int i;
 240 
 241         for (i = 0; i < insn->n; i++) {
 242                 unsigned int val = data[i];
 243 
 244                 s->readback[chan] = val;
 245 
 246                 /* bipolar data to the DAC is two's complement */
 247                 if (comedi_chan_range_is_bipolar(s, chan, range))
 248                         val = comedi_offset_munge(s, val);
 249 
 250                 /* order is important, MSB then LSB */
 251                 outb((val >> 8) & 0xff, dev->iobase + PCL726_AO_MSB_REG(chan));
 252                 outb(val & 0xff, dev->iobase + PCL726_AO_LSB_REG(chan));
 253         }
 254 
 255         return insn->n;
 256 }
 257 
 258 static int pcl726_di_insn_bits(struct comedi_device *dev,
 259                                struct comedi_subdevice *s,
 260                                struct comedi_insn *insn,
 261                                unsigned int *data)
 262 {
 263         const struct pcl726_board *board = dev->board_ptr;
 264         unsigned int val;
 265 
 266         if (board->is_pcl727) {
 267                 val = inb(dev->iobase + PCL727_DI_LSB_REG);
 268                 val |= (inb(dev->iobase + PCL727_DI_MSB_REG) << 8);
 269         } else {
 270                 val = inb(dev->iobase + PCL726_DI_LSB_REG);
 271                 val |= (inb(dev->iobase + PCL726_DI_MSB_REG) << 8);
 272         }
 273 
 274         data[1] = val;
 275 
 276         return insn->n;
 277 }
 278 
 279 static int pcl726_do_insn_bits(struct comedi_device *dev,
 280                                struct comedi_subdevice *s,
 281                                struct comedi_insn *insn,
 282                                unsigned int *data)
 283 {
 284         const struct pcl726_board *board = dev->board_ptr;
 285         unsigned long io = dev->iobase;
 286         unsigned int mask;
 287 
 288         mask = comedi_dio_update_state(s, data);
 289         if (mask) {
 290                 if (board->is_pcl727) {
 291                         if (mask & 0x00ff)
 292                                 outb(s->state & 0xff, io + PCL727_DO_LSB_REG);
 293                         if (mask & 0xff00)
 294                                 outb((s->state >> 8), io + PCL727_DO_MSB_REG);
 295                 } else {
 296                         if (mask & 0x00ff)
 297                                 outb(s->state & 0xff, io + PCL726_DO_LSB_REG);
 298                         if (mask & 0xff00)
 299                                 outb((s->state >> 8), io + PCL726_DO_MSB_REG);
 300                 }
 301         }
 302 
 303         data[1] = s->state;
 304 
 305         return insn->n;
 306 }
 307 
 308 static int pcl726_attach(struct comedi_device *dev,
 309                          struct comedi_devconfig *it)
 310 {
 311         const struct pcl726_board *board = dev->board_ptr;
 312         struct pcl726_private *devpriv;
 313         struct comedi_subdevice *s;
 314         int subdev;
 315         int ret;
 316         int i;
 317 
 318         ret = comedi_request_region(dev, it->options[0], board->io_len);
 319         if (ret)
 320                 return ret;
 321 
 322         devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
 323         if (!devpriv)
 324                 return -ENOMEM;
 325 
 326         /*
 327          * Hook up the external trigger source interrupt only if the
 328          * user config option is valid and the board supports interrupts.
 329          */
 330         if (it->options[1] && (board->irq_mask & (1 << it->options[1]))) {
 331                 ret = request_irq(it->options[1], pcl726_interrupt, 0,
 332                                   dev->board_name, dev);
 333                 if (ret == 0) {
 334                         /* External trigger source is from Pin-17 of CN3 */
 335                         dev->irq = it->options[1];
 336                 }
 337         }
 338 
 339         /* setup the per-channel analog output range_table_list */
 340         for (i = 0; i < 12; i++) {
 341                 unsigned int opt = it->options[2 + i];
 342 
 343                 if (opt < board->ao_num_ranges && i < board->ao_nchan)
 344                         devpriv->rangelist[i] = board->ao_ranges[opt];
 345                 else
 346                         devpriv->rangelist[i] = &range_unknown;
 347         }
 348 
 349         subdev = board->have_dio ? 3 : 1;
 350         if (dev->irq)
 351                 subdev++;
 352         ret = comedi_alloc_subdevices(dev, subdev);
 353         if (ret)
 354                 return ret;
 355 
 356         subdev = 0;
 357 
 358         /* Analog Output subdevice */
 359         s = &dev->subdevices[subdev++];
 360         s->type         = COMEDI_SUBD_AO;
 361         s->subdev_flags = SDF_WRITABLE | SDF_GROUND;
 362         s->n_chan       = board->ao_nchan;
 363         s->maxdata      = 0x0fff;
 364         s->range_table_list = devpriv->rangelist;
 365         s->insn_write   = pcl726_ao_insn_write;
 366 
 367         ret = comedi_alloc_subdev_readback(s);
 368         if (ret)
 369                 return ret;
 370 
 371         if (board->have_dio) {
 372                 /* Digital Input subdevice */
 373                 s = &dev->subdevices[subdev++];
 374                 s->type         = COMEDI_SUBD_DI;
 375                 s->subdev_flags = SDF_READABLE;
 376                 s->n_chan       = 16;
 377                 s->maxdata      = 1;
 378                 s->insn_bits    = pcl726_di_insn_bits;
 379                 s->range_table  = &range_digital;
 380 
 381                 /* Digital Output subdevice */
 382                 s = &dev->subdevices[subdev++];
 383                 s->type         = COMEDI_SUBD_DO;
 384                 s->subdev_flags = SDF_WRITABLE;
 385                 s->n_chan       = 16;
 386                 s->maxdata      = 1;
 387                 s->insn_bits    = pcl726_do_insn_bits;
 388                 s->range_table  = &range_digital;
 389         }
 390 
 391         if (dev->irq) {
 392                 /* Digial Input subdevice - Interrupt support */
 393                 s = &dev->subdevices[subdev++];
 394                 dev->read_subdev = s;
 395                 s->type         = COMEDI_SUBD_DI;
 396                 s->subdev_flags = SDF_READABLE | SDF_CMD_READ;
 397                 s->n_chan       = 1;
 398                 s->maxdata      = 1;
 399                 s->range_table  = &range_digital;
 400                 s->insn_bits    = pcl726_intr_insn_bits;
 401                 s->len_chanlist = 1;
 402                 s->do_cmdtest   = pcl726_intr_cmdtest;
 403                 s->do_cmd       = pcl726_intr_cmd;
 404                 s->cancel       = pcl726_intr_cancel;
 405         }
 406 
 407         return 0;
 408 }
 409 
 410 static struct comedi_driver pcl726_driver = {
 411         .driver_name    = "pcl726",
 412         .module         = THIS_MODULE,
 413         .attach         = pcl726_attach,
 414         .detach         = comedi_legacy_detach,
 415         .board_name     = &pcl726_boards[0].name,
 416         .num_names      = ARRAY_SIZE(pcl726_boards),
 417         .offset         = sizeof(struct pcl726_board),
 418 };
 419 module_comedi_driver(pcl726_driver);
 420 
 421 MODULE_AUTHOR("Comedi http://www.comedi.org");
 422 MODULE_DESCRIPTION("Comedi driver for Advantech PCL-726 & compatibles");
 423 MODULE_LICENSE("GPL");