root/drivers/staging/comedi/drivers/pcl711.c

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DEFINITIONS

This source file includes following definitions.
  1. pcl711_ai_set_mode
  2. pcl711_ai_get_sample
  3. pcl711_ai_cancel
  4. pcl711_interrupt
  5. pcl711_set_changain
  6. pcl711_ai_eoc
  7. pcl711_ai_insn_read
  8. pcl711_ai_cmdtest
  9. pcl711_ai_cmd
  10. pcl711_ao_write
  11. pcl711_ao_insn_write
  12. pcl711_di_insn_bits
  13. pcl711_do_insn_bits
  14. pcl711_attach

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * pcl711.c
   4  * Comedi driver for PC-LabCard PCL-711 and AdSys ACL-8112 and compatibles
   5  * Copyright (C) 1998 David A. Schleef <ds@schleef.org>
   6  *                    Janne Jalkanen <jalkanen@cs.hut.fi>
   7  *                    Eric Bunn <ebu@cs.hut.fi>
   8  *
   9  * COMEDI - Linux Control and Measurement Device Interface
  10  * Copyright (C) 1998 David A. Schleef <ds@schleef.org>
  11  */
  12 
  13 /*
  14  * Driver: pcl711
  15  * Description: Advantech PCL-711 and 711b, ADLink ACL-8112
  16  * Devices: [Advantech] PCL-711 (pcl711), PCL-711B (pcl711b),
  17  *   [ADLink] ACL-8112HG (acl8112hg), ACL-8112DG (acl8112dg)
  18  * Author: David A. Schleef <ds@schleef.org>
  19  *         Janne Jalkanen <jalkanen@cs.hut.fi>
  20  *         Eric Bunn <ebu@cs.hut.fi>
  21  * Updated:
  22  * Status: mostly complete
  23  *
  24  * Configuration Options:
  25  *   [0] - I/O port base
  26  *   [1] - IRQ, optional
  27  */
  28 
  29 #include <linux/module.h>
  30 #include <linux/delay.h>
  31 #include <linux/interrupt.h>
  32 
  33 #include "../comedidev.h"
  34 
  35 #include "comedi_8254.h"
  36 
  37 /*
  38  * I/O port register map
  39  */
  40 #define PCL711_TIMER_BASE       0x00
  41 #define PCL711_AI_LSB_REG       0x04
  42 #define PCL711_AI_MSB_REG       0x05
  43 #define PCL711_AI_MSB_DRDY      BIT(4)
  44 #define PCL711_AO_LSB_REG(x)    (0x04 + ((x) * 2))
  45 #define PCL711_AO_MSB_REG(x)    (0x05 + ((x) * 2))
  46 #define PCL711_DI_LSB_REG       0x06
  47 #define PCL711_DI_MSB_REG       0x07
  48 #define PCL711_INT_STAT_REG     0x08
  49 #define PCL711_INT_STAT_CLR     (0 << 0)  /* any value will work */
  50 #define PCL711_AI_GAIN_REG      0x09
  51 #define PCL711_AI_GAIN(x)       (((x) & 0xf) << 0)
  52 #define PCL711_MUX_REG          0x0a
  53 #define PCL711_MUX_CHAN(x)      (((x) & 0xf) << 0)
  54 #define PCL711_MUX_CS0          BIT(4)
  55 #define PCL711_MUX_CS1          BIT(5)
  56 #define PCL711_MUX_DIFF         (PCL711_MUX_CS0 | PCL711_MUX_CS1)
  57 #define PCL711_MODE_REG         0x0b
  58 #define PCL711_MODE(x)          (((x) & 0x7) << 0)
  59 #define PCL711_MODE_DEFAULT     PCL711_MODE(0)
  60 #define PCL711_MODE_SOFTTRIG    PCL711_MODE(1)
  61 #define PCL711_MODE_EXT         PCL711_MODE(2)
  62 #define PCL711_MODE_EXT_IRQ     PCL711_MODE(3)
  63 #define PCL711_MODE_PACER       PCL711_MODE(4)
  64 #define PCL711_MODE_PACER_IRQ   PCL711_MODE(6)
  65 #define PCL711_MODE_IRQ(x)      (((x) & 0x7) << 4)
  66 #define PCL711_SOFTTRIG_REG     0x0c
  67 #define PCL711_SOFTTRIG         (0 << 0)  /* any value will work */
  68 #define PCL711_DO_LSB_REG       0x0d
  69 #define PCL711_DO_MSB_REG       0x0e
  70 
  71 static const struct comedi_lrange range_pcl711b_ai = {
  72         5, {
  73                 BIP_RANGE(5),
  74                 BIP_RANGE(2.5),
  75                 BIP_RANGE(1.25),
  76                 BIP_RANGE(0.625),
  77                 BIP_RANGE(0.3125)
  78         }
  79 };
  80 
  81 static const struct comedi_lrange range_acl8112hg_ai = {
  82         12, {
  83                 BIP_RANGE(5),
  84                 BIP_RANGE(0.5),
  85                 BIP_RANGE(0.05),
  86                 BIP_RANGE(0.005),
  87                 UNI_RANGE(10),
  88                 UNI_RANGE(1),
  89                 UNI_RANGE(0.1),
  90                 UNI_RANGE(0.01),
  91                 BIP_RANGE(10),
  92                 BIP_RANGE(1),
  93                 BIP_RANGE(0.1),
  94                 BIP_RANGE(0.01)
  95         }
  96 };
  97 
  98 static const struct comedi_lrange range_acl8112dg_ai = {
  99         9, {
 100                 BIP_RANGE(5),
 101                 BIP_RANGE(2.5),
 102                 BIP_RANGE(1.25),
 103                 BIP_RANGE(0.625),
 104                 UNI_RANGE(10),
 105                 UNI_RANGE(5),
 106                 UNI_RANGE(2.5),
 107                 UNI_RANGE(1.25),
 108                 BIP_RANGE(10)
 109         }
 110 };
 111 
 112 struct pcl711_board {
 113         const char *name;
 114         int n_aichan;
 115         int n_aochan;
 116         int maxirq;
 117         const struct comedi_lrange *ai_range_type;
 118 };
 119 
 120 static const struct pcl711_board boardtypes[] = {
 121         {
 122                 .name           = "pcl711",
 123                 .n_aichan       = 8,
 124                 .n_aochan       = 1,
 125                 .ai_range_type  = &range_bipolar5,
 126         }, {
 127                 .name           = "pcl711b",
 128                 .n_aichan       = 8,
 129                 .n_aochan       = 1,
 130                 .maxirq         = 7,
 131                 .ai_range_type  = &range_pcl711b_ai,
 132         }, {
 133                 .name           = "acl8112hg",
 134                 .n_aichan       = 16,
 135                 .n_aochan       = 2,
 136                 .maxirq         = 15,
 137                 .ai_range_type  = &range_acl8112hg_ai,
 138         }, {
 139                 .name           = "acl8112dg",
 140                 .n_aichan       = 16,
 141                 .n_aochan       = 2,
 142                 .maxirq         = 15,
 143                 .ai_range_type  = &range_acl8112dg_ai,
 144         },
 145 };
 146 
 147 static void pcl711_ai_set_mode(struct comedi_device *dev, unsigned int mode)
 148 {
 149         /*
 150          * The pcl711b board uses bits in the mode register to select the
 151          * interrupt. The other boards supported by this driver all use
 152          * jumpers on the board.
 153          *
 154          * Enables the interrupt when needed on the pcl711b board. These
 155          * bits do nothing on the other boards.
 156          */
 157         if (mode == PCL711_MODE_EXT_IRQ || mode == PCL711_MODE_PACER_IRQ)
 158                 mode |= PCL711_MODE_IRQ(dev->irq);
 159 
 160         outb(mode, dev->iobase + PCL711_MODE_REG);
 161 }
 162 
 163 static unsigned int pcl711_ai_get_sample(struct comedi_device *dev,
 164                                          struct comedi_subdevice *s)
 165 {
 166         unsigned int val;
 167 
 168         val = inb(dev->iobase + PCL711_AI_MSB_REG) << 8;
 169         val |= inb(dev->iobase + PCL711_AI_LSB_REG);
 170 
 171         return val & s->maxdata;
 172 }
 173 
 174 static int pcl711_ai_cancel(struct comedi_device *dev,
 175                             struct comedi_subdevice *s)
 176 {
 177         outb(PCL711_INT_STAT_CLR, dev->iobase + PCL711_INT_STAT_REG);
 178         pcl711_ai_set_mode(dev, PCL711_MODE_SOFTTRIG);
 179         return 0;
 180 }
 181 
 182 static irqreturn_t pcl711_interrupt(int irq, void *d)
 183 {
 184         struct comedi_device *dev = d;
 185         struct comedi_subdevice *s = dev->read_subdev;
 186         struct comedi_cmd *cmd = &s->async->cmd;
 187         unsigned int data;
 188 
 189         if (!dev->attached) {
 190                 dev_err(dev->class_dev, "spurious interrupt\n");
 191                 return IRQ_HANDLED;
 192         }
 193 
 194         data = pcl711_ai_get_sample(dev, s);
 195 
 196         outb(PCL711_INT_STAT_CLR, dev->iobase + PCL711_INT_STAT_REG);
 197 
 198         comedi_buf_write_samples(s, &data, 1);
 199 
 200         if (cmd->stop_src == TRIG_COUNT &&
 201             s->async->scans_done >= cmd->stop_arg)
 202                 s->async->events |= COMEDI_CB_EOA;
 203 
 204         comedi_handle_events(dev, s);
 205 
 206         return IRQ_HANDLED;
 207 }
 208 
 209 static void pcl711_set_changain(struct comedi_device *dev,
 210                                 struct comedi_subdevice *s,
 211                                 unsigned int chanspec)
 212 {
 213         unsigned int chan = CR_CHAN(chanspec);
 214         unsigned int range = CR_RANGE(chanspec);
 215         unsigned int aref = CR_AREF(chanspec);
 216         unsigned int mux = 0;
 217 
 218         outb(PCL711_AI_GAIN(range), dev->iobase + PCL711_AI_GAIN_REG);
 219 
 220         if (s->n_chan > 8) {
 221                 /* Select the correct MPC508A chip */
 222                 if (aref == AREF_DIFF) {
 223                         chan &= 0x7;
 224                         mux |= PCL711_MUX_DIFF;
 225                 } else {
 226                         if (chan < 8)
 227                                 mux |= PCL711_MUX_CS0;
 228                         else
 229                                 mux |= PCL711_MUX_CS1;
 230                 }
 231         }
 232         outb(mux | PCL711_MUX_CHAN(chan), dev->iobase + PCL711_MUX_REG);
 233 }
 234 
 235 static int pcl711_ai_eoc(struct comedi_device *dev,
 236                          struct comedi_subdevice *s,
 237                          struct comedi_insn *insn,
 238                          unsigned long context)
 239 {
 240         unsigned int status;
 241 
 242         status = inb(dev->iobase + PCL711_AI_MSB_REG);
 243         if ((status & PCL711_AI_MSB_DRDY) == 0)
 244                 return 0;
 245         return -EBUSY;
 246 }
 247 
 248 static int pcl711_ai_insn_read(struct comedi_device *dev,
 249                                struct comedi_subdevice *s,
 250                                struct comedi_insn *insn,
 251                                unsigned int *data)
 252 {
 253         int ret;
 254         int i;
 255 
 256         pcl711_set_changain(dev, s, insn->chanspec);
 257 
 258         pcl711_ai_set_mode(dev, PCL711_MODE_SOFTTRIG);
 259 
 260         for (i = 0; i < insn->n; i++) {
 261                 outb(PCL711_SOFTTRIG, dev->iobase + PCL711_SOFTTRIG_REG);
 262 
 263                 ret = comedi_timeout(dev, s, insn, pcl711_ai_eoc, 0);
 264                 if (ret)
 265                         return ret;
 266 
 267                 data[i] = pcl711_ai_get_sample(dev, s);
 268         }
 269 
 270         return insn->n;
 271 }
 272 
 273 static int pcl711_ai_cmdtest(struct comedi_device *dev,
 274                              struct comedi_subdevice *s, struct comedi_cmd *cmd)
 275 {
 276         int err = 0;
 277 
 278         /* Step 1 : check if triggers are trivially valid */
 279 
 280         err |= comedi_check_trigger_src(&cmd->start_src, TRIG_NOW);
 281         err |= comedi_check_trigger_src(&cmd->scan_begin_src,
 282                                         TRIG_TIMER | TRIG_EXT);
 283         err |= comedi_check_trigger_src(&cmd->convert_src, TRIG_NOW);
 284         err |= comedi_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
 285         err |= comedi_check_trigger_src(&cmd->stop_src, TRIG_COUNT | TRIG_NONE);
 286 
 287         if (err)
 288                 return 1;
 289 
 290         /* Step 2a : make sure trigger sources are unique */
 291 
 292         err |= comedi_check_trigger_is_unique(cmd->scan_begin_src);
 293         err |= comedi_check_trigger_is_unique(cmd->stop_src);
 294 
 295         /* Step 2b : and mutually compatible */
 296 
 297         if (err)
 298                 return 2;
 299 
 300         /* Step 3: check if arguments are trivially valid */
 301 
 302         err |= comedi_check_trigger_arg_is(&cmd->start_arg, 0);
 303 
 304         if (cmd->scan_begin_src == TRIG_EXT) {
 305                 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
 306         } else {
 307 #define MAX_SPEED 1000
 308                 err |= comedi_check_trigger_arg_min(&cmd->scan_begin_arg,
 309                                                     MAX_SPEED);
 310         }
 311 
 312         err |= comedi_check_trigger_arg_is(&cmd->convert_arg, 0);
 313         err |= comedi_check_trigger_arg_is(&cmd->scan_end_arg,
 314                                            cmd->chanlist_len);
 315 
 316         if (cmd->stop_src == TRIG_COUNT)
 317                 err |= comedi_check_trigger_arg_min(&cmd->stop_arg, 1);
 318         else    /* TRIG_NONE */
 319                 err |= comedi_check_trigger_arg_is(&cmd->stop_arg, 0);
 320 
 321         if (err)
 322                 return 3;
 323 
 324         /* step 4 */
 325 
 326         if (cmd->scan_begin_src == TRIG_TIMER) {
 327                 unsigned int arg = cmd->scan_begin_arg;
 328 
 329                 comedi_8254_cascade_ns_to_timer(dev->pacer, &arg, cmd->flags);
 330                 err |= comedi_check_trigger_arg_is(&cmd->scan_begin_arg, arg);
 331         }
 332 
 333         if (err)
 334                 return 4;
 335 
 336         return 0;
 337 }
 338 
 339 static int pcl711_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
 340 {
 341         struct comedi_cmd *cmd = &s->async->cmd;
 342 
 343         pcl711_set_changain(dev, s, cmd->chanlist[0]);
 344 
 345         if (cmd->scan_begin_src == TRIG_TIMER) {
 346                 comedi_8254_update_divisors(dev->pacer);
 347                 comedi_8254_pacer_enable(dev->pacer, 1, 2, true);
 348                 outb(PCL711_INT_STAT_CLR, dev->iobase + PCL711_INT_STAT_REG);
 349                 pcl711_ai_set_mode(dev, PCL711_MODE_PACER_IRQ);
 350         } else {
 351                 pcl711_ai_set_mode(dev, PCL711_MODE_EXT_IRQ);
 352         }
 353 
 354         return 0;
 355 }
 356 
 357 static void pcl711_ao_write(struct comedi_device *dev,
 358                             unsigned int chan, unsigned int val)
 359 {
 360         outb(val & 0xff, dev->iobase + PCL711_AO_LSB_REG(chan));
 361         outb((val >> 8) & 0xff, dev->iobase + PCL711_AO_MSB_REG(chan));
 362 }
 363 
 364 static int pcl711_ao_insn_write(struct comedi_device *dev,
 365                                 struct comedi_subdevice *s,
 366                                 struct comedi_insn *insn,
 367                                 unsigned int *data)
 368 {
 369         unsigned int chan = CR_CHAN(insn->chanspec);
 370         unsigned int val = s->readback[chan];
 371         int i;
 372 
 373         for (i = 0; i < insn->n; i++) {
 374                 val = data[i];
 375                 pcl711_ao_write(dev, chan, val);
 376         }
 377         s->readback[chan] = val;
 378 
 379         return insn->n;
 380 }
 381 
 382 static int pcl711_di_insn_bits(struct comedi_device *dev,
 383                                struct comedi_subdevice *s,
 384                                struct comedi_insn *insn,
 385                                unsigned int *data)
 386 {
 387         unsigned int val;
 388 
 389         val = inb(dev->iobase + PCL711_DI_LSB_REG);
 390         val |= (inb(dev->iobase + PCL711_DI_MSB_REG) << 8);
 391 
 392         data[1] = val;
 393 
 394         return insn->n;
 395 }
 396 
 397 static int pcl711_do_insn_bits(struct comedi_device *dev,
 398                                struct comedi_subdevice *s,
 399                                struct comedi_insn *insn,
 400                                unsigned int *data)
 401 {
 402         unsigned int mask;
 403 
 404         mask = comedi_dio_update_state(s, data);
 405         if (mask) {
 406                 if (mask & 0x00ff)
 407                         outb(s->state & 0xff, dev->iobase + PCL711_DO_LSB_REG);
 408                 if (mask & 0xff00)
 409                         outb((s->state >> 8), dev->iobase + PCL711_DO_MSB_REG);
 410         }
 411 
 412         data[1] = s->state;
 413 
 414         return insn->n;
 415 }
 416 
 417 static int pcl711_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 418 {
 419         const struct pcl711_board *board = dev->board_ptr;
 420         struct comedi_subdevice *s;
 421         int ret;
 422 
 423         ret = comedi_request_region(dev, it->options[0], 0x10);
 424         if (ret)
 425                 return ret;
 426 
 427         if (it->options[1] && it->options[1] <= board->maxirq) {
 428                 ret = request_irq(it->options[1], pcl711_interrupt, 0,
 429                                   dev->board_name, dev);
 430                 if (ret == 0)
 431                         dev->irq = it->options[1];
 432         }
 433 
 434         dev->pacer = comedi_8254_init(dev->iobase + PCL711_TIMER_BASE,
 435                                       I8254_OSC_BASE_2MHZ, I8254_IO8, 0);
 436         if (!dev->pacer)
 437                 return -ENOMEM;
 438 
 439         ret = comedi_alloc_subdevices(dev, 4);
 440         if (ret)
 441                 return ret;
 442 
 443         /* Analog Input subdevice */
 444         s = &dev->subdevices[0];
 445         s->type         = COMEDI_SUBD_AI;
 446         s->subdev_flags = SDF_READABLE | SDF_GROUND;
 447         if (board->n_aichan > 8)
 448                 s->subdev_flags |= SDF_DIFF;
 449         s->n_chan       = board->n_aichan;
 450         s->maxdata      = 0xfff;
 451         s->range_table  = board->ai_range_type;
 452         s->insn_read    = pcl711_ai_insn_read;
 453         if (dev->irq) {
 454                 dev->read_subdev = s;
 455                 s->subdev_flags |= SDF_CMD_READ;
 456                 s->len_chanlist = 1;
 457                 s->do_cmdtest   = pcl711_ai_cmdtest;
 458                 s->do_cmd       = pcl711_ai_cmd;
 459                 s->cancel       = pcl711_ai_cancel;
 460         }
 461 
 462         /* Analog Output subdevice */
 463         s = &dev->subdevices[1];
 464         s->type         = COMEDI_SUBD_AO;
 465         s->subdev_flags = SDF_WRITABLE;
 466         s->n_chan       = board->n_aochan;
 467         s->maxdata      = 0xfff;
 468         s->range_table  = &range_bipolar5;
 469         s->insn_write   = pcl711_ao_insn_write;
 470 
 471         ret = comedi_alloc_subdev_readback(s);
 472         if (ret)
 473                 return ret;
 474 
 475         /* Digital Input subdevice */
 476         s = &dev->subdevices[2];
 477         s->type         = COMEDI_SUBD_DI;
 478         s->subdev_flags = SDF_READABLE;
 479         s->n_chan       = 16;
 480         s->maxdata      = 1;
 481         s->range_table  = &range_digital;
 482         s->insn_bits    = pcl711_di_insn_bits;
 483 
 484         /* Digital Output subdevice */
 485         s = &dev->subdevices[3];
 486         s->type         = COMEDI_SUBD_DO;
 487         s->subdev_flags = SDF_WRITABLE;
 488         s->n_chan       = 16;
 489         s->maxdata      = 1;
 490         s->range_table  = &range_digital;
 491         s->insn_bits    = pcl711_do_insn_bits;
 492 
 493         /* clear DAC */
 494         pcl711_ao_write(dev, 0, 0x0);
 495         pcl711_ao_write(dev, 1, 0x0);
 496 
 497         return 0;
 498 }
 499 
 500 static struct comedi_driver pcl711_driver = {
 501         .driver_name    = "pcl711",
 502         .module         = THIS_MODULE,
 503         .attach         = pcl711_attach,
 504         .detach         = comedi_legacy_detach,
 505         .board_name     = &boardtypes[0].name,
 506         .num_names      = ARRAY_SIZE(boardtypes),
 507         .offset         = sizeof(struct pcl711_board),
 508 };
 509 module_comedi_driver(pcl711_driver);
 510 
 511 MODULE_AUTHOR("Comedi http://www.comedi.org");
 512 MODULE_DESCRIPTION("Comedi driver for PCL-711 compatible boards");
 513 MODULE_LICENSE("GPL");

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