LXR linux/drivers/staging/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
  31#include "../comedi_pcmcia.h"
  32
  33#include "comedi_8254.h"
  34
  35/*
  36 * Register I/O map
  37 */
  38#define DAS16CS_AI_DATA_REG             0x00
  39#define DAS16CS_AI_MUX_REG              0x02
  40#define DAS16CS_AI_MUX_HI_CHAN(x)       (((x) & 0xf) << 4)
  41#define DAS16CS_AI_MUX_LO_CHAN(x)       (((x) & 0xf) << 0)
  42#define DAS16CS_AI_MUX_SINGLE_CHAN(x)   (DAS16CS_AI_MUX_HI_CHAN(x) |    \
  43                                         DAS16CS_AI_MUX_LO_CHAN(x))
  44#define DAS16CS_MISC1_REG               0x04
  45#define DAS16CS_MISC1_INTE              BIT(15) /* 1=enable; 0=disable */
  46#define DAS16CS_MISC1_INT_SRC(x)        (((x) & 0x7) << 12) /* interrupt src */
  47#define DAS16CS_MISC1_INT_SRC_NONE      DAS16CS_MISC1_INT_SRC(0)
  48#define DAS16CS_MISC1_INT_SRC_PACER     DAS16CS_MISC1_INT_SRC(1)
  49#define DAS16CS_MISC1_INT_SRC_EXT       DAS16CS_MISC1_INT_SRC(2)
  50#define DAS16CS_MISC1_INT_SRC_FNE       DAS16CS_MISC1_INT_SRC(3)
  51#define DAS16CS_MISC1_INT_SRC_FHF       DAS16CS_MISC1_INT_SRC(4)
  52#define DAS16CS_MISC1_INT_SRC_EOS       DAS16CS_MISC1_INT_SRC(5)
  53#define DAS16CS_MISC1_INT_SRC_MASK      DAS16CS_MISC1_INT_SRC(7)
  54#define DAS16CS_MISC1_OVR               BIT(10) /* ro - 1=FIFO overflow */
  55#define DAS16CS_MISC1_AI_CONV(x)        (((x) & 0x3) << 8) /* AI convert src */
  56#define DAS16CS_MISC1_AI_CONV_SW        DAS16CS_MISC1_AI_CONV(0)
  57#define DAS16CS_MISC1_AI_CONV_EXT_NEG   DAS16CS_MISC1_AI_CONV(1)
  58#define DAS16CS_MISC1_AI_CONV_EXT_POS   DAS16CS_MISC1_AI_CONV(2)
  59#define DAS16CS_MISC1_AI_CONV_PACER     DAS16CS_MISC1_AI_CONV(3)
  60#define DAS16CS_MISC1_AI_CONV_MASK      DAS16CS_MISC1_AI_CONV(3)
  61#define DAS16CS_MISC1_EOC               BIT(7)  /* ro - 0=busy; 1=ready */
  62#define DAS16CS_MISC1_SEDIFF            BIT(5)  /* 0=diff; 1=se */
  63#define DAS16CS_MISC1_INTB              BIT(4)  /* ro - 0=latched; 1=cleared */
  64#define DAS16CS_MISC1_MA_MASK           (0xf << 0) /* ro - current ai mux */
  65#define DAS16CS_MISC1_DAC1CS            BIT(3)  /* wo - DAC1 chip select */
  66#define DAS16CS_MISC1_DACCLK            BIT(2)  /* wo - Serial DAC clock */
  67#define DAS16CS_MISC1_DACSD             BIT(1)  /* wo - Serial DAC data */
  68#define DAS16CS_MISC1_DAC0CS            BIT(0)  /* wo - DAC0 chip select */
  69#define DAS16CS_MISC1_DAC_MASK          (0x0f << 0)
  70#define DAS16CS_MISC2_REG               0x06
  71#define DAS16CS_MISC2_BME               BIT(14) /* 1=burst enable; 0=disable */
  72#define DAS16CS_MISC2_AI_GAIN(x)        (((x) & 0xf) << 8) /* AI gain */
  73#define DAS16CS_MISC2_AI_GAIN_1         DAS16CS_MISC2_AI_GAIN(4) /* +/-10V */
  74#define DAS16CS_MISC2_AI_GAIN_2         DAS16CS_MISC2_AI_GAIN(0) /* +/-5V */
  75#define DAS16CS_MISC2_AI_GAIN_4         DAS16CS_MISC2_AI_GAIN(1) /* +/-2.5V */
  76#define DAS16CS_MISC2_AI_GAIN_8         DAS16CS_MISC2_AI_GAIN(2) /* +-1.25V */
  77#define DAS16CS_MISC2_AI_GAIN_MASK      DAS16CS_MISC2_AI_GAIN(0xf)
  78#define DAS16CS_MISC2_UDIR              BIT(7)  /* 1=dio7:4 output; 0=input */
  79#define DAS16CS_MISC2_LDIR              BIT(6)  /* 1=dio3:0 output; 0=input */
  80#define DAS16CS_MISC2_TRGPOL            BIT(5)  /* 1=active lo; 0=hi */
  81#define DAS16CS_MISC2_TRGSEL            BIT(4)  /* 1=edge; 0=level */
  82#define DAS16CS_MISC2_FFNE              BIT(3)  /* ro - 1=FIFO not empty */
  83#define DAS16CS_MISC2_TRGCLR            BIT(3)  /* wo - 1=clr (monstable) */
  84#define DAS16CS_MISC2_CLK2              BIT(2)  /* 1=10 MHz; 0=1 MHz */
  85#define DAS16CS_MISC2_CTR1              BIT(1)  /* 1=int. 100 kHz; 0=ext. clk */
  86#define DAS16CS_MISC2_TRG0              BIT(0)  /* 1=enable; 0=disable */
  87#define DAS16CS_TIMER_BASE              0x08
  88#define DAS16CS_DIO_REG                 0x10
  89
  90struct das16cs_board {
  91        const char *name;
  92        int device_id;
  93        unsigned int has_ao:1;
  94        unsigned int has_4dio:1;
  95};
  96
  97static const struct das16cs_board das16cs_boards[] = {
  98        {
  99                .name           = "PC-CARD DAS16/16-AO",
 100                .device_id      = 0x0039,
 101                .has_ao         = 1,
 102                .has_4dio       = 1,
 103        }, {
 104                .name           = "PCM-DAS16s/16",
 105                .device_id      = 0x4009,
 106        }, {
 107                .name           = "PC-CARD DAS16/16",
 108                .device_id      = 0x0000,       /* unknown */
 109        },
 110};
 111
 112struct das16cs_private {
 113        unsigned short misc1;
 114        unsigned short misc2;
 115};
 116
 117static const struct comedi_lrange das16cs_ai_range = {
 118        4, {
 119                BIP_RANGE(10),
 120                BIP_RANGE(5),
 121                BIP_RANGE(2.5),
 122                BIP_RANGE(1.25),
 123        }
 124};
 125
 126static int das16cs_ai_eoc(struct comedi_device *dev,
 127                          struct comedi_subdevice *s,
 128                          struct comedi_insn *insn,
 129                          unsigned long context)
 130{
 131        unsigned int status;
 132
 133        status = inw(dev->iobase + DAS16CS_MISC1_REG);
 134        if (status & DAS16CS_MISC1_EOC)
 135                return 0;
 136        return -EBUSY;
 137}
 138
 139static int das16cs_ai_insn_read(struct comedi_device *dev,
 140                                struct comedi_subdevice *s,
 141                                struct comedi_insn *insn,
 142                                unsigned int *data)
 143{
 144        struct das16cs_private *devpriv = dev->private;
 145        int chan = CR_CHAN(insn->chanspec);
 146        int range = CR_RANGE(insn->chanspec);
 147        int aref = CR_AREF(insn->chanspec);
 148        int ret;
 149        int i;
 150
 151        outw(DAS16CS_AI_MUX_SINGLE_CHAN(chan),
 152             dev->iobase + DAS16CS_AI_MUX_REG);
 153
 154        /* disable interrupts, software convert */
 155        devpriv->misc1 &= ~(DAS16CS_MISC1_INTE | DAS16CS_MISC1_INT_SRC_MASK |
 156                              DAS16CS_MISC1_AI_CONV_MASK);
 157        if (aref == AREF_DIFF)
 158                devpriv->misc1 &= ~DAS16CS_MISC1_SEDIFF;
 159        else
 160                devpriv->misc1 |= DAS16CS_MISC1_SEDIFF;
 161        outw(devpriv->misc1, dev->iobase + DAS16CS_MISC1_REG);
 162
 163        devpriv->misc2 &= ~(DAS16CS_MISC2_BME | DAS16CS_MISC2_AI_GAIN_MASK);
 164        switch (range) {
 165        case 0:
 166                devpriv->misc2 |= DAS16CS_MISC2_AI_GAIN_1;
 167                break;
 168        case 1:
 169                devpriv->misc2 |= DAS16CS_MISC2_AI_GAIN_2;
 170                break;
 171        case 2:
 172                devpriv->misc2 |= DAS16CS_MISC2_AI_GAIN_4;
 173                break;
 174        case 3:
 175                devpriv->misc2 |= DAS16CS_MISC2_AI_GAIN_8;
 176                break;
 177        }
 178        outw(devpriv->misc2, dev->iobase + DAS16CS_MISC2_REG);
 179
 180        for (i = 0; i < insn->n; i++) {
 181                outw(0, dev->iobase + DAS16CS_AI_DATA_REG);
 182
 183                ret = comedi_timeout(dev, s, insn, das16cs_ai_eoc, 0);
 184                if (ret)
 185                        return ret;
 186
 187                data[i] = inw(dev->iobase + DAS16CS_AI_DATA_REG);
 188        }
 189
 190        return i;
 191}
 192
 193static int das16cs_ao_insn_write(struct comedi_device *dev,
 194                                 struct comedi_subdevice *s,
 195                                 struct comedi_insn *insn,
 196                                 unsigned int *data)
 197{
 198        struct das16cs_private *devpriv = dev->private;
 199        unsigned int chan = CR_CHAN(insn->chanspec);
 200        unsigned int val = s->readback[chan];
 201        unsigned short misc1;
 202        int bit;
 203        int i;
 204
 205        for (i = 0; i < insn->n; i++) {
 206                val = data[i];
 207
 208                outw(devpriv->misc1, dev->iobase + DAS16CS_MISC1_REG);
 209                udelay(1);
 210
 211                /* raise the DACxCS line for the non-selected channel */
 212                misc1 = devpriv->misc1 & ~DAS16CS_MISC1_DAC_MASK;
 213                if (chan)
 214                        misc1 |= DAS16CS_MISC1_DAC0CS;
 215                else
 216                        misc1 |= DAS16CS_MISC1_DAC1CS;
 217
 218                outw(misc1, dev->iobase + DAS16CS_MISC1_REG);
 219                udelay(1);
 220
 221                for (bit = 15; bit >= 0; bit--) {
 222                        if ((val >> bit) & 0x1)
 223                                misc1 |= DAS16CS_MISC1_DACSD;
 224                        else
 225                                misc1 &= ~DAS16CS_MISC1_DACSD;
 226                        outw(misc1, dev->iobase + DAS16CS_MISC1_REG);
 227                        udelay(1);
 228                        outw(misc1 | DAS16CS_MISC1_DACCLK,
 229                             dev->iobase + DAS16CS_MISC1_REG);
 230                        udelay(1);
 231                }
 232                /*
 233                 * Make both DAC0CS and DAC1CS high to load
 234                 * the new data and update analog the output
 235                 */
 236                outw(misc1 | DAS16CS_MISC1_DAC0CS | DAS16CS_MISC1_DAC1CS,
 237                     dev->iobase + DAS16CS_MISC1_REG);
 238        }
 239        s->readback[chan] = val;
 240
 241        return insn->n;
 242}
 243
 244static int das16cs_dio_insn_bits(struct comedi_device *dev,
 245                                 struct comedi_subdevice *s,
 246                                 struct comedi_insn *insn,
 247                                 unsigned int *data)
 248{
 249        if (comedi_dio_update_state(s, data))
 250                outw(s->state, dev->iobase + DAS16CS_DIO_REG);
 251
 252        data[1] = inw(dev->iobase + DAS16CS_DIO_REG);
 253
 254        return insn->n;
 255}
 256
 257static int das16cs_dio_insn_config(struct comedi_device *dev,
 258                                   struct comedi_subdevice *s,
 259                                   struct comedi_insn *insn,
 260                                   unsigned int *data)
 261{
 262        struct das16cs_private *devpriv = dev->private;
 263        unsigned int chan = CR_CHAN(insn->chanspec);
 264        unsigned int mask;
 265        int ret;
 266
 267        if (chan < 4)
 268                mask = 0x0f;
 269        else
 270                mask = 0xf0;
 271
 272        ret = comedi_dio_insn_config(dev, s, insn, data, mask);
 273        if (ret)
 274                return ret;
 275
 276        if (s->io_bits & 0xf0)
 277                devpriv->misc2 |= DAS16CS_MISC2_UDIR;
 278        else
 279                devpriv->misc2 &= ~DAS16CS_MISC2_UDIR;
 280        if (s->io_bits & 0x0f)
 281                devpriv->misc2 |= DAS16CS_MISC2_LDIR;
 282        else
 283                devpriv->misc2 &= ~DAS16CS_MISC2_LDIR;
 284        outw(devpriv->misc2, dev->iobase + DAS16CS_MISC2_REG);
 285
 286        return insn->n;
 287}
 288
 289static int das16cs_counter_insn_config(struct comedi_device *dev,
 290                                       struct comedi_subdevice *s,
 291                                       struct comedi_insn *insn,
 292                                       unsigned int *data)
 293{
 294        struct das16cs_private *devpriv = dev->private;
 295
 296        switch (data[0]) {
 297        case INSN_CONFIG_SET_CLOCK_SRC:
 298                switch (data[1]) {
 299                case 0: /* internal 100 kHz */
 300                        devpriv->misc2 |= DAS16CS_MISC2_CTR1;
 301                        break;
 302                case 1: /* external */
 303                        devpriv->misc2 &= ~DAS16CS_MISC2_CTR1;
 304                        break;
 305                default:
 306                        return -EINVAL;
 307                }
 308                outw(devpriv->misc2, dev->iobase + DAS16CS_MISC2_REG);
 309                break;
 310        case INSN_CONFIG_GET_CLOCK_SRC:
 311                if (devpriv->misc2 & DAS16CS_MISC2_CTR1) {
 312                        data[1] = 0;
 313                        data[2] = I8254_OSC_BASE_100KHZ;
 314                } else {
 315                        data[1] = 1;
 316                        data[2] = 0;    /* unknown */
 317                }
 318                break;
 319        default:
 320                return -EINVAL;
 321        }
 322
 323        return insn->n;
 324}
 325
 326static const void *das16cs_find_boardinfo(struct comedi_device *dev,
 327                                          struct pcmcia_device *link)
 328{
 329        const struct das16cs_board *board;
 330        int i;
 331
 332        for (i = 0; i < ARRAY_SIZE(das16cs_boards); i++) {
 333                board = &das16cs_boards[i];
 334                if (board->device_id == link->card_id)
 335                        return board;
 336        }
 337
 338        return NULL;
 339}
 340
 341static int das16cs_auto_attach(struct comedi_device *dev,
 342                               unsigned long context)
 343{
 344        struct pcmcia_device *link = comedi_to_pcmcia_dev(dev);
 345        const struct das16cs_board *board;
 346        struct das16cs_private *devpriv;
 347        struct comedi_subdevice *s;
 348        int ret;
 349
 350        board = das16cs_find_boardinfo(dev, link);
 351        if (!board)
 352                return -ENODEV;
 353        dev->board_ptr = board;
 354        dev->board_name = board->name;
 355
 356        link->config_flags |= CONF_AUTO_SET_IO | CONF_ENABLE_IRQ;
 357        ret = comedi_pcmcia_enable(dev, NULL);
 358        if (ret)
 359                return ret;
 360        dev->iobase = link->resource[0]->start;
 361
 362        link->priv = dev;
 363
 364        devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
 365        if (!devpriv)
 366                return -ENOMEM;
 367
 368        dev->pacer = comedi_8254_init(dev->iobase + DAS16CS_TIMER_BASE,
 369                                      I8254_OSC_BASE_10MHZ, I8254_IO16, 0);
 370        if (!dev->pacer)
 371                return -ENOMEM;
 372
 373        ret = comedi_alloc_subdevices(dev, 4);
 374        if (ret)
 375                return ret;
 376
 377        /* Analog Input subdevice */
 378        s = &dev->subdevices[0];
 379        s->type         = COMEDI_SUBD_AI;
 380        s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF;
 381        s->n_chan       = 16;
 382        s->maxdata      = 0xffff;
 383        s->range_table  = &das16cs_ai_range;
 384        s->insn_read    = das16cs_ai_insn_read;
 385
 386        /* Analog Output subdevice */
 387        s = &dev->subdevices[1];
 388        if (board->has_ao) {
 389                s->type         = COMEDI_SUBD_AO;
 390                s->subdev_flags = SDF_WRITABLE;
 391                s->n_chan       = 2;
 392                s->maxdata      = 0xffff;
 393                s->range_table  = &range_bipolar10;
 394                s->insn_write   = &das16cs_ao_insn_write;
 395
 396                ret = comedi_alloc_subdev_readback(s);
 397                if (ret)
 398                        return ret;
 399        } else {
 400                s->type         = COMEDI_SUBD_UNUSED;
 401        }
 402
 403        /* Digital I/O subdevice */
 404        s = &dev->subdevices[2];
 405        s->type         = COMEDI_SUBD_DIO;
 406        s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
 407        s->n_chan       = board->has_4dio ? 4 : 8;
 408        s->maxdata      = 1;
 409        s->range_table  = &range_digital;
 410        s->insn_bits    = das16cs_dio_insn_bits;
 411        s->insn_config  = das16cs_dio_insn_config;
 412
 413        /* Counter subdevice (8254) */
 414        s = &dev->subdevices[3];
 415        comedi_8254_subdevice_init(s, dev->pacer);
 416
 417        dev->pacer->insn_config = das16cs_counter_insn_config;
 418
 419        /* counters 1 and 2 are used internally for the pacer */
 420        comedi_8254_set_busy(dev->pacer, 1, true);
 421        comedi_8254_set_busy(dev->pacer, 2, true);
 422
 423        return 0;
 424}
 425
 426static struct comedi_driver driver_das16cs = {
 427        .driver_name    = "cb_das16_cs",
 428        .module         = THIS_MODULE,
 429        .auto_attach    = das16cs_auto_attach,
 430        .detach         = comedi_pcmcia_disable,
 431};
 432
 433static int das16cs_pcmcia_attach(struct pcmcia_device *link)
 434{
 435        return comedi_pcmcia_auto_config(link, &driver_das16cs);
 436}
 437
 438static const struct pcmcia_device_id das16cs_id_table[] = {
 439        PCMCIA_DEVICE_MANF_CARD(0x01c5, 0x0039),
 440        PCMCIA_DEVICE_MANF_CARD(0x01c5, 0x4009),
 441        PCMCIA_DEVICE_NULL
 442};
 443MODULE_DEVICE_TABLE(pcmcia, das16cs_id_table);
 444
 445static struct pcmcia_driver das16cs_driver = {
 446        .name           = "cb_das16_cs",
 447        .owner          = THIS_MODULE,
 448        .id_table       = das16cs_id_table,
 449        .probe          = das16cs_pcmcia_attach,
 450        .remove         = comedi_pcmcia_auto_unconfig,
 451};
 452module_comedi_pcmcia_driver(driver_das16cs, das16cs_driver);
 453
 454MODULE_AUTHOR("David A. Schleef <ds@schleef.org>");
 455MODULE_DESCRIPTION("Comedi driver for Computer Boards PC-CARD DAS16/16");
 456MODULE_LICENSE("GPL");
 457