LXR linux/drivers/comedi/drivers/cb_das16

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * cb_das16_cs.c
   4 * Driver for Computer Boards PC-CARD DAS16/16.
   5 *
   6 * COMEDI - Linux Control and Measurement Device Interface
   7 * Copyright (C) 2000, 2001, 2002 David A. Schleef <ds@schleef.org>
   8 *
   9 * PCMCIA support code for this driver is adapted from the dummy_cs.c
  10 * driver of the Linux PCMCIA Card Services package.
  11 *
  12 * The initial developer of the original code is David A. Hinds
  13 * <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
  14 * are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
  15 */
  16
  17/*
  18 * Driver: cb_das16_cs
  19 * Description: Computer Boards PC-CARD DAS16/16
  20 * Devices: [ComputerBoards] PC-CARD DAS16/16 (cb_das16_cs),
  21 *   PC-CARD DAS16/16-AO
  22 * Author: ds
  23 * Updated: Mon, 04 Nov 2002 20:04:21 -0800
  24 * Status: experimental
  25 */
  26
  27#include <linux/module.h>
  28#include <linux/interrupt.h>
  29#include <linux/delay.h>
  30#include <linux/comedi/comedi_pcmcia.h>
  31#include <linux/comedi/comedi_8254.h>
  32
  33/*
  34 * Register I/O map
  35 */
  36#define DAS16CS_AI_DATA_REG             0x00
  37#define DAS16CS_AI_MUX_REG              0x02
  38#define DAS16CS_AI_MUX_HI_CHAN(x)       (((x) & 0xf) << 4)
  39#define DAS16CS_AI_MUX_LO_CHAN(x)       (((x) & 0xf) << 0)
  40#define DAS16CS_AI_MUX_SINGLE_CHAN(x)   (DAS16CS_AI_MUX_HI_CHAN(x) |    \
  41                                         DAS16CS_AI_MUX_LO_CHAN(x))
  42#define DAS16CS_MISC1_REG               0x04
  43#define DAS16CS_MISC1_INTE              BIT(15) /* 1=enable; 0=disable */
  44#define DAS16CS_MISC1_INT_SRC(x)        (((x) & 0x7) << 12) /* interrupt src */
  45#define DAS16CS_MISC1_INT_SRC_NONE      DAS16CS_MISC1_INT_SRC(0)
  46#define DAS16CS_MISC1_INT_SRC_PACER     DAS16CS_MISC1_INT_SRC(1)
  47#define DAS16CS_MISC1_INT_SRC_EXT       DAS16CS_MISC1_INT_SRC(2)
  48#define DAS16CS_MISC1_INT_SRC_FNE       DAS16CS_MISC1_INT_SRC(3)
  49#define DAS16CS_MISC1_INT_SRC_FHF       DAS16CS_MISC1_INT_SRC(4)
  50#define DAS16CS_MISC1_INT_SRC_EOS       DAS16CS_MISC1_INT_SRC(5)
  51#define DAS16CS_MISC1_INT_SRC_MASK      DAS16CS_MISC1_INT_SRC(7)
  52#define DAS16CS_MISC1_OVR               BIT(10) /* ro - 1=FIFO overflow */
  53#define DAS16CS_MISC1_AI_CONV(x)        (((x) & 0x3) << 8) /* AI convert src */
  54#define DAS16CS_MISC1_AI_CONV_SW        DAS16CS_MISC1_AI_CONV(0)
  55#define DAS16CS_MISC1_AI_CONV_EXT_NEG   DAS16CS_MISC1_AI_CONV(1)
  56#define DAS16CS_MISC1_AI_CONV_EXT_POS   DAS16CS_MISC1_AI_CONV(2)
  57#define DAS16CS_MISC1_AI_CONV_PACER     DAS16CS_MISC1_AI_CONV(3)
  58#define DAS16CS_MISC1_AI_CONV_MASK      DAS16CS_MISC1_AI_CONV(3)
  59#define DAS16CS_MISC1_EOC               BIT(7)  /* ro - 0=busy; 1=ready */
  60#define DAS16CS_MISC1_SEDIFF            BIT(5)  /* 0=diff; 1=se */
  61#define DAS16CS_MISC1_INTB              BIT(4)  /* ro - 0=latched; 1=cleared */
  62#define DAS16CS_MISC1_MA_MASK           (0xf << 0) /* ro - current ai mux */
  63#define DAS16CS_MISC1_DAC1CS            BIT(3)  /* wo - DAC1 chip select */
  64#define DAS16CS_MISC1_DACCLK            BIT(2)  /* wo - Serial DAC clock */
  65#define DAS16CS_MISC1_DACSD             BIT(1)  /* wo - Serial DAC data */
  66#define DAS16CS_MISC1_DAC0CS            BIT(0)  /* wo - DAC0 chip select */
  67#define DAS16CS_MISC1_DAC_MASK          (0x0f << 0)
  68#define DAS16CS_MISC2_REG               0x06
  69#define DAS16CS_MISC2_BME               BIT(14) /* 1=burst enable; 0=disable */
  70#define DAS16CS_MISC2_AI_GAIN(x)        (((x) & 0xf) << 8) /* AI gain */
  71#define DAS16CS_MISC2_AI_GAIN_1         DAS16CS_MISC2_AI_GAIN(4) /* +/-10V */
  72#define DAS16CS_MISC2_AI_GAIN_2         DAS16CS_MISC2_AI_GAIN(0) /* +/-5V */
  73#define DAS16CS_MISC2_AI_GAIN_4         DAS16CS_MISC2_AI_GAIN(1) /* +/-2.5V */
  74#define DAS16CS_MISC2_AI_GAIN_8         DAS16CS_MISC2_AI_GAIN(2) /* +-1.25V */
  75#define DAS16CS_MISC2_AI_GAIN_MASK      DAS16CS_MISC2_AI_GAIN(0xf)
  76#define DAS16CS_MISC2_UDIR              BIT(7)  /* 1=dio7:4 output; 0=input */
  77#define DAS16CS_MISC2_LDIR              BIT(6)  /* 1=dio3:0 output; 0=input */
  78#define DAS16CS_MISC2_TRGPOL            BIT(5)  /* 1=active lo; 0=hi */
  79#define DAS16CS_MISC2_TRGSEL            BIT(4)  /* 1=edge; 0=level */
  80#define DAS16CS_MISC2_FFNE              BIT(3)  /* ro - 1=FIFO not empty */
  81#define DAS16CS_MISC2_TRGCLR            BIT(3)  /* wo - 1=clr (monstable) */
  82#define DAS16CS_MISC2_CLK2              BIT(2)  /* 1=10 MHz; 0=1 MHz */
  83#define DAS16CS_MISC2_CTR1              BIT(1)  /* 1=int. 100 kHz; 0=ext. clk */
  84#define DAS16CS_MISC2_TRG0              BIT(0)  /* 1=enable; 0=disable */
  85#define DAS16CS_TIMER_BASE              0x08
  86#define DAS16CS_DIO_REG                 0x10
  87
  88struct das16cs_board {
  89        const char *name;
  90        int device_id;
  91        unsigned int has_ao:1;
  92        unsigned int has_4dio:1;
  93};
  94
  95static const struct das16cs_board das16cs_boards[] = {
  96        {
  97                .name           = "PC-CARD DAS16/16-AO",
  98                .device_id      = 0x0039,
  99                .has_ao         = 1,
 100                .has_4dio       = 1,
 101        }, {
 102                .name           = "PCM-DAS16s/16",
 103                .device_id      = 0x4009,
 104        }, {
 105                .name           = "PC-CARD DAS16/16",
 106                .device_id      = 0x0000,       /* unknown */
 107        },
 108};
 109
 110struct das16cs_private {
 111        unsigned short misc1;
 112        unsigned short misc2;
 113};
 114
 115static const struct comedi_lrange das16cs_ai_range = {
 116        4, {
 117                BIP_RANGE(10),
 118                BIP_RANGE(5),
 119                BIP_RANGE(2.5),
 120                BIP_RANGE(1.25),
 121        }
 122};
 123
 124static int das16cs_ai_eoc(struct comedi_device *dev,
 125                          struct comedi_subdevice *s,
 126                          struct comedi_insn *insn,
 127                          unsigned long context)
 128{
 129        unsigned int status;
 130
 131        status = inw(dev->iobase + DAS16CS_MISC1_REG);
 132        if (status & DAS16CS_MISC1_EOC)
 133                return 0;
 134        return -EBUSY;
 135}
 136
 137static int das16cs_ai_insn_read(struct comedi_device *dev,
 138                                struct comedi_subdevice *s,
 139                                struct comedi_insn *insn,
 140                                unsigned int *data)
 141{
 142        struct das16cs_private *devpriv = dev->private;
 143        int chan = CR_CHAN(insn->chanspec);
 144        int range = CR_RANGE(insn->chanspec);
 145        int aref = CR_AREF(insn->chanspec);
 146        int ret;
 147        int i;
 148
 149        outw(DAS16CS_AI_MUX_SINGLE_CHAN(chan),
 150             dev->iobase + DAS16CS_AI_MUX_REG);
 151
 152        /* disable interrupts, software convert */
 153        devpriv->misc1 &= ~(DAS16CS_MISC1_INTE | DAS16CS_MISC1_INT_SRC_MASK |
 154                              DAS16CS_MISC1_AI_CONV_MASK);
 155        if (aref == AREF_DIFF)
 156                devpriv->misc1 &= ~DAS16CS_MISC1_SEDIFF;
 157        else
 158                devpriv->misc1 |= DAS16CS_MISC1_SEDIFF;
 159        outw(devpriv->misc1, dev->iobase + DAS16CS_MISC1_REG);
 160
 161        devpriv->misc2 &= ~(DAS16CS_MISC2_BME | DAS16CS_MISC2_AI_GAIN_MASK);
 162        switch (range) {
 163        case 0:
 164                devpriv->misc2 |= DAS16CS_MISC2_AI_GAIN_1;
 165                break;
 166        case 1:
 167                devpriv->misc2 |= DAS16CS_MISC2_AI_GAIN_2;
 168                break;
 169        case 2:
 170                devpriv->misc2 |= DAS16CS_MISC2_AI_GAIN_4;
 171                break;
 172        case 3:
 173                devpriv->misc2 |= DAS16CS_MISC2_AI_GAIN_8;
 174                break;
 175        }
 176        outw(devpriv->misc2, dev->iobase + DAS16CS_MISC2_REG);
 177
 178        for (i = 0; i < insn->n; i++) {
 179                outw(0, dev->iobase + DAS16CS_AI_DATA_REG);
 180
 181                ret = comedi_timeout(dev, s, insn, das16cs_ai_eoc, 0);
 182                if (ret)
 183                        return ret;
 184
 185                data[i] = inw(dev->iobase + DAS16CS_AI_DATA_REG);
 186        }
 187
 188        return i;
 189}
 190
 191static int das16cs_ao_insn_write(struct comedi_device *dev,
 192                                 struct comedi_subdevice *s,
 193                                 struct comedi_insn *insn,
 194                                 unsigned int *data)
 195{
 196        struct das16cs_private *devpriv = dev->private;
 197        unsigned int chan = CR_CHAN(insn->chanspec);
 198        unsigned int val = s->readback[chan];
 199        unsigned short misc1;
 200        int bit;
 201        int i;
 202
 203        for (i = 0; i < insn->n; i++) {
 204                val = data[i];
 205
 206                outw(devpriv->misc1, dev->iobase + DAS16CS_MISC1_REG);
 207                udelay(1);
 208
 209                /* raise the DACxCS line for the non-selected channel */
 210                misc1 = devpriv->misc1 & ~DAS16CS_MISC1_DAC_MASK;
 211                if (chan)
 212                        misc1 |= DAS16CS_MISC1_DAC0CS;
 213                else
 214                        misc1 |= DAS16CS_MISC1_DAC1CS;
 215
 216                outw(misc1, dev->iobase + DAS16CS_MISC1_REG);
 217                udelay(1);
 218
 219                for (bit = 15; bit >= 0; bit--) {
 220                        if ((val >> bit) & 0x1)
 221                                misc1 |= DAS16CS_MISC1_DACSD;
 222                        else
 223                                misc1 &= ~DAS16CS_MISC1_DACSD;
 224                        outw(misc1, dev->iobase + DAS16CS_MISC1_REG);
 225                        udelay(1);
 226                        outw(misc1 | DAS16CS_MISC1_DACCLK,
 227                             dev->iobase + DAS16CS_MISC1_REG);
 228                        udelay(1);
 229                }
 230                /*
 231                 * Make both DAC0CS and DAC1CS high to load
 232                 * the new data and update analog the output
 233                 */
 234                outw(misc1 | DAS16CS_MISC1_DAC0CS | DAS16CS_MISC1_DAC1CS,
 235                     dev->iobase + DAS16CS_MISC1_REG);
 236        }
 237        s->readback[chan] = val;
 238
 239        return insn->n;
 240}
 241
 242static int das16cs_dio_insn_bits(struct comedi_device *dev,
 243                                 struct comedi_subdevice *s,
 244                                 struct comedi_insn *insn,
 245                                 unsigned int *data)
 246{
 247        if (comedi_dio_update_state(s, data))
 248                outw(s->state, dev->iobase + DAS16CS_DIO_REG);
 249
 250        data[1] = inw(dev->iobase + DAS16CS_DIO_REG);
 251
 252        return insn->n;
 253}
 254
 255static int das16cs_dio_insn_config(struct comedi_device *dev,
 256                                   struct comedi_subdevice *s,
 257                                   struct comedi_insn *insn,
 258                                   unsigned int *data)
 259{
 260        struct das16cs_private *devpriv = dev->private;
 261        unsigned int chan = CR_CHAN(insn->chanspec);
 262        unsigned int mask;
 263        int ret;
 264
 265        if (chan < 4)
 266                mask = 0x0f;
 267        else
 268                mask = 0xf0;
 269
 270        ret = comedi_dio_insn_config(dev, s, insn, data, mask);
 271        if (ret)
 272                return ret;
 273
 274        if (s->io_bits & 0xf0)
 275                devpriv->misc2 |= DAS16CS_MISC2_UDIR;
 276        else
 277                devpriv->misc2 &= ~DAS16CS_MISC2_UDIR;
 278        if (s->io_bits & 0x0f)
 279                devpriv->misc2 |= DAS16CS_MISC2_LDIR;
 280        else
 281                devpriv->misc2 &= ~DAS16CS_MISC2_LDIR;
 282        outw(devpriv->misc2, dev->iobase + DAS16CS_MISC2_REG);
 283
 284        return insn->n;
 285}
 286
 287static int das16cs_counter_insn_config(struct comedi_device *dev,
 288                                       struct comedi_subdevice *s,
 289                                       struct comedi_insn *insn,
 290                                       unsigned int *data)
 291{
 292        struct das16cs_private *devpriv = dev->private;
 293
 294        switch (data[0]) {
 295        case INSN_CONFIG_SET_CLOCK_SRC:
 296                switch (data[1]) {
 297                case 0: /* internal 100 kHz */
 298                        devpriv->misc2 |= DAS16CS_MISC2_CTR1;
 299                        break;
 300                case 1: /* external */
 301                        devpriv->misc2 &= ~DAS16CS_MISC2_CTR1;
 302                        break;
 303                default:
 304                        return -EINVAL;
 305                }
 306                outw(devpriv->misc2, dev->iobase + DAS16CS_MISC2_REG);
 307                break;
 308        case INSN_CONFIG_GET_CLOCK_SRC:
 309                if (devpriv->misc2 & DAS16CS_MISC2_CTR1) {
 310                        data[1] = 0;
 311                        data[2] = I8254_OSC_BASE_100KHZ;
 312                } else {
 313                        data[1] = 1;
 314                        data[2] = 0;    /* unknown */
 315                }
 316                break;
 317        default:
 318                return -EINVAL;
 319        }
 320
 321        return insn->n;
 322}
 323
 324static const void *das16cs_find_boardinfo(struct comedi_device *dev,
 325                                          struct pcmcia_device *link)
 326{
 327        const struct das16cs_board *board;
 328        int i;
 329
 330        for (i = 0; i < ARRAY_SIZE(das16cs_boards); i++) {
 331                board = &das16cs_boards[i];
 332                if (board->device_id == link->card_id)
 333                        return board;
 334        }
 335
 336        return NULL;
 337}
 338
 339static int das16cs_auto_attach(struct comedi_device *dev,
 340                               unsigned long context)
 341{
 342        struct pcmcia_device *link = comedi_to_pcmcia_dev(dev);
 343        const struct das16cs_board *board;
 344        struct das16cs_private *devpriv;
 345        struct comedi_subdevice *s;
 346        int ret;
 347
 348        board = das16cs_find_boardinfo(dev, link);
 349        if (!board)
 350                return -ENODEV;
 351        dev->board_ptr = board;
 352        dev->board_name = board->name;
 353
 354        link->config_flags |= CONF_AUTO_SET_IO | CONF_ENABLE_IRQ;
 355        ret = comedi_pcmcia_enable(dev, NULL);
 356        if (ret)
 357                return ret;
 358        dev->iobase = link->resource[0]->start;
 359
 360        link->priv = dev;
 361
 362        devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
 363        if (!devpriv)
 364                return -ENOMEM;
 365
 366        dev->pacer = comedi_8254_init(dev->iobase + DAS16CS_TIMER_BASE,
 367                                      I8254_OSC_BASE_10MHZ, I8254_IO16, 0);
 368        if (!dev->pacer)
 369                return -ENOMEM;
 370
 371        ret = comedi_alloc_subdevices(dev, 4);
 372        if (ret)
 373                return ret;
 374
 375        /* Analog Input subdevice */
 376        s = &dev->subdevices[0];
 377        s->type         = COMEDI_SUBD_AI;
 378        s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF;
 379        s->n_chan       = 16;
 380        s->maxdata      = 0xffff;
 381        s->range_table  = &das16cs_ai_range;
 382        s->insn_read    = das16cs_ai_insn_read;
 383
 384        /* Analog Output subdevice */
 385        s = &dev->subdevices[1];
 386        if (board->has_ao) {
 387                s->type         = COMEDI_SUBD_AO;
 388                s->subdev_flags = SDF_WRITABLE;
 389                s->n_chan       = 2;
 390                s->maxdata      = 0xffff;
 391                s->range_table  = &range_bipolar10;
 392                s->insn_write   = &das16cs_ao_insn_write;
 393
 394                ret = comedi_alloc_subdev_readback(s);
 395                if (ret)
 396                        return ret;
 397        } else {
 398                s->type         = COMEDI_SUBD_UNUSED;
 399        }
 400
 401        /* Digital I/O subdevice */
 402        s = &dev->subdevices[2];
 403        s->type         = COMEDI_SUBD_DIO;
 404        s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
 405        s->n_chan       = board->has_4dio ? 4 : 8;
 406        s->maxdata      = 1;
 407        s->range_table  = &range_digital;
 408        s->insn_bits    = das16cs_dio_insn_bits;
 409        s->insn_config  = das16cs_dio_insn_config;
 410
 411        /* Counter subdevice (8254) */
 412        s = &dev->subdevices[3];
 413        comedi_8254_subdevice_init(s, dev->pacer);
 414
 415        dev->pacer->insn_config = das16cs_counter_insn_config;
 416
 417        /* counters 1 and 2 are used internally for the pacer */
 418        comedi_8254_set_busy(dev->pacer, 1, true);
 419        comedi_8254_set_busy(dev->pacer, 2, true);
 420
 421        return 0;
 422}
 423
 424static struct comedi_driver driver_das16cs = {
 425        .driver_name    = "cb_das16_cs",
 426        .module         = THIS_MODULE,
 427        .auto_attach    = das16cs_auto_attach,
 428        .detach         = comedi_pcmcia_disable,
 429};
 430
 431static int das16cs_pcmcia_attach(struct pcmcia_device *link)
 432{
 433        return comedi_pcmcia_auto_config(link, &driver_das16cs);
 434}
 435
 436static const struct pcmcia_device_id das16cs_id_table[] = {
 437        PCMCIA_DEVICE_MANF_CARD(0x01c5, 0x0039),
 438        PCMCIA_DEVICE_MANF_CARD(0x01c5, 0x4009),
 439        PCMCIA_DEVICE_NULL
 440};
 441MODULE_DEVICE_TABLE(pcmcia, das16cs_id_table);
 442
 443static struct pcmcia_driver das16cs_driver = {
 444        .name           = "cb_das16_cs",
 445        .owner          = THIS_MODULE,
 446        .id_table       = das16cs_id_table,
 447        .probe          = das16cs_pcmcia_attach,
 448        .remove         = comedi_pcmcia_auto_unconfig,
 449};
 450module_comedi_pcmcia_driver(driver_das16cs, das16cs_driver);
 451
 452MODULE_AUTHOR("David A. Schleef <ds@schleef.org>");
 453MODULE_DESCRIPTION("Comedi driver for Computer Boards PC-CARD DAS16/16");
 454MODULE_LICENSE("GPL");
 455