drivers/staging/comedi/drivers/ni_at_ao.c

   1 /*
   2     comedi/drivers/ni_at_ao.c
   3     Driver for NI AT-AO-6/10 boards
   4
   5     COMEDI - Linux Control and Measurement Device Interface
   6     Copyright (C) 2000,2002 David A. Schleef <ds@schleef.org>
   7
   8     This program is free software; you can redistribute it and/or modify
   9     it under the terms of the GNU General Public License as published by
  10     the Free Software Foundation; either version 2 of the License, or
  11     (at your option) any later version.
  12
  13     This program is distributed in the hope that it will be useful,
  14     but WITHOUT ANY WARRANTY; without even the implied warranty of
  15     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16     GNU General Public License for more details.
  17
  18     You should have received a copy of the GNU General Public License
  19     along with this program; if not, write to the Free Software
  20     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21
  22 */
  23 /*
  24 Driver: ni_at_ao
  25 Description: National Instruments AT-AO-6/10
  26 Devices: [National Instruments] AT-AO-6 (at-ao-6), AT-AO-10 (at-ao-10)
  27 Status: should work
  28 Author: ds
  29 Updated: Sun Dec 26 12:26:28 EST 2004
  30
  31 Configuration options:
  32   [0] - I/O port base address
  33   [1] - IRQ (unused)
  34   [2] - DMA (unused)
  35   [3] - analog output range, set by jumpers on hardware (0 for -10 to 10V
  36         bipolar, 1 for 0V to 10V unipolar)
  37
  38 */
  39 /*
  40  * Register-level programming information can be found in NI
  41  * document 320379.pdf.
  42  */
  43
  44 #include "../comedidev.h"
  45
  46 #include <linux/ioport.h>
  47
  48 /* board egisters */
  49 /* registers with _2_ are accessed when GRP2WR is set in CFG1 */
  50
  51 #define ATAO_SIZE 0x20
  52
  53 #define ATAO_2_DMATCCLR         0x00    /* W 16 */
  54 #define ATAO_DIN                0x00    /* R 16 */
  55 #define ATAO_DOUT               0x00    /* W 16 */
  56
  57 #define ATAO_CFG2               0x02    /* W 16 */
  58 #define CALLD1  0x8000
  59 #define CALLD0  0x4000
  60 #define FFRTEN  0x2000
  61 #define DAC2S8  0x1000
  62 #define DAC2S6  0x0800
  63 #define DAC2S4  0x0400
  64 #define DAC2S2  0x0200
  65 #define DAC2S0  0x0100
  66 #define LDAC8           0x0080
  67 #define LDAC6           0x0040
  68 #define LDAC4           0x0020
  69 #define LDAC2           0x0010
  70 #define LDAC0           0x0008
  71 #define PROMEN  0x0004
  72 #define SCLK            0x0002
  73 #define SDATA           0x0001
  74
  75 #define ATAO_2_INT1CLR          0x02    /* W 16 */
  76
  77 #define ATAO_CFG3               0x04    /* W 16 */
  78 #define DMAMODE 0x0040
  79 #define CLKOUT  0x0020
  80 #define RCLKEN  0x0010
  81 #define DOUTEN2 0x0008
  82 #define DOUTEN1 0x0004
  83 #define EN2_5V  0x0002
  84 #define SCANEN  0x0001
  85
  86 #define ATAO_2_INT2CLR          0x04    /* W 16 */
  87
  88 #define ATAO_82C53_BASE         0x06    /* RW 8 */
  89
  90 #define ATAO_82C53_CNTR1        0x06    /* RW 8 */
  91 #define ATAO_82C53_CNTR2        0x07    /* RW 8 */
  92 #define ATAO_82C53_CNTR3        0x08    /* RW 8 */
  93 #define ATAO_82C53_CNTRCMD      0x09    /* W 8 */
  94 #define CNTRSEL1        0x80
  95 #define CNTRSEL0        0x40
  96 #define RWSEL1  0x20
  97 #define RWSEL0  0x10
  98 #define MODESEL2        0x08
  99 #define MODESEL1        0x04
 100 #define MODESEL0        0x02
 101 #define BCDSEL  0x01
 102   /* read-back command */
 103 #define COUNT           0x20
 104 #define STATUS  0x10
 105 #define CNTR3           0x08
 106 #define CNTR2           0x04
 107 #define CNTR1           0x02
 108   /* status */
 109 #define OUT             0x80
 110 #define _NULL           0x40
 111 #define RW1             0x20
 112 #define RW0             0x10
 113 #define MODE2           0x08
 114 #define MODE1           0x04
 115 #define MODE0           0x02
 116 #define BCD             0x01
 117
 118 #define ATAO_2_RTSISHFT         0x06    /* W 8 */
 119 #define RSI             0x01
 120
 121 #define ATAO_2_RTSISTRB         0x07    /* W 8 */
 122
 123 #define ATAO_CFG1               0x0a    /* W 16 */
 124 #define EXTINT2EN       0x8000
 125 #define EXTINT1EN       0x4000
 126 #define CNTINT2EN       0x2000
 127 #define CNTINT1EN       0x1000
 128 #define TCINTEN 0x0800
 129 #define CNT1SRC 0x0400
 130 #define CNT2SRC 0x0200
 131 #define FIFOEN  0x0100
 132 #define GRP2WR  0x0080
 133 #define EXTUPDEN        0x0040
 134 #define DMARQ           0x0020
 135 #define DMAEN           0x0010
 136 #define CH_mask 0x000f
 137 #define ATAO_STATUS             0x0a    /* R 16 */
 138 #define FH              0x0040
 139 #define FE              0x0020
 140 #define FF              0x0010
 141 #define INT2            0x0008
 142 #define INT1            0x0004
 143 #define TCINT           0x0002
 144 #define PROMOUT 0x0001
 145
 146 #define ATAO_FIFO_WRITE         0x0c    /* W 16 */
 147 #define ATAO_FIFO_CLEAR         0x0c    /* R 16 */
 148 #define ATAO_DACn(x)            (0x0c + 2*(x))  /* W */
 149
 150 /*
 151  * Board descriptions for two imaginary boards.  Describing the
 152  * boards in this way is optional, and completely driver-dependent.
 153  * Some drivers use arrays such as this, other do not.
 154  */
 155 struct atao_board {
 156         const char *name;
 157         int n_ao_chans;
 158 };
 159
 160 static const struct atao_board atao_boards[] = {
 161         {
 162          .name = "ai-ao-6",
 163          .n_ao_chans = 6,
 164          },
 165         {
 166          .name = "ai-ao-10",
 167          .n_ao_chans = 10,
 168          },
 169 };
 170
 171 #define thisboard ((struct atao_board *)dev->board_ptr)
 172
 173 struct atao_private {
 174
 175         unsigned short cfg1;
 176         unsigned short cfg2;
 177         unsigned short cfg3;
 178
 179         /* Used for AO readback */
 180         unsigned int ao_readback[10];
 181 };
 182
 183 #define devpriv ((struct atao_private *)dev->private)
 184
 185 static int atao_attach(struct comedi_device *dev, struct comedi_devconfig *it);
 186 static int atao_detach(struct comedi_device *dev);
 187 static struct comedi_driver driver_atao = {
 188         .driver_name = "ni_at_ao",
 189         .module = THIS_MODULE,
 190         .attach = atao_attach,
 191         .detach = atao_detach,
 192         .board_name = &atao_boards[0].name,
 193         .offset = sizeof(struct atao_board),
 194         .num_names = ARRAY_SIZE(atao_boards),
 195 };
 196
 197 static int __init driver_atao_init_module(void)
 198 {
 199         return comedi_driver_register(&driver_atao);
 200 }
 201
 202 static void __exit driver_atao_cleanup_module(void)
 203 {
 204         comedi_driver_unregister(&driver_atao);
 205 }
 206
 207 module_init(driver_atao_init_module);
 208 module_exit(driver_atao_cleanup_module);
 209
 210 static void atao_reset(struct comedi_device *dev);
 211
 212 static int atao_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
 213                          struct comedi_insn *insn, unsigned int *data);
 214 static int atao_ao_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
 215                          struct comedi_insn *insn, unsigned int *data);
 216 static int atao_dio_insn_bits(struct comedi_device *dev,
 217                               struct comedi_subdevice *s,
 218                               struct comedi_insn *insn, unsigned int *data);
 219 static int atao_dio_insn_config(struct comedi_device *dev,
 220                                 struct comedi_subdevice *s,
 221                                 struct comedi_insn *insn, unsigned int *data);
 222 static int atao_calib_insn_read(struct comedi_device *dev,
 223                                 struct comedi_subdevice *s,
 224                                 struct comedi_insn *insn, unsigned int *data);
 225 static int atao_calib_insn_write(struct comedi_device *dev,
 226                                  struct comedi_subdevice *s,
 227                                  struct comedi_insn *insn, unsigned int *data);
 228
 229 static int atao_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 230 {
 231         struct comedi_subdevice *s;
 232         unsigned long iobase;
 233         int ao_unipolar;
 234
 235         iobase = it->options[0];
 236         if (iobase == 0)
 237                 iobase = 0x1c0;
 238         ao_unipolar = it->options[3];
 239
 240         printk(KERN_INFO "comedi%d: ni_at_ao: 0x%04lx", dev->minor, iobase);
 241
 242         if (!request_region(iobase, ATAO_SIZE, "ni_at_ao")) {
 243                 printk(" I/O port conflict\n");
 244                 return -EIO;
 245         }
 246         dev->iobase = iobase;
 247
 248         /* dev->board_ptr = atao_probe(dev); */
 249
 250         dev->board_name = thisboard->name;
 251
 252         if (alloc_private(dev, sizeof(struct atao_private)) < 0)
 253                 return -ENOMEM;
 254
 255         if (alloc_subdevices(dev, 4) < 0)
 256                 return -ENOMEM;
 257
 258         s = dev->subdevices + 0;
 259         /* analog output subdevice */
 260         s->type = COMEDI_SUBD_AO;
 261         s->subdev_flags = SDF_WRITABLE;
 262         s->n_chan = thisboard->n_ao_chans;
 263         s->maxdata = (1 << 12) - 1;
 264         if (ao_unipolar)
 265                 s->range_table = &range_unipolar10;
 266         else
 267                 s->range_table = &range_bipolar10;
 268         s->insn_write = &atao_ao_winsn;
 269         s->insn_read = &atao_ao_rinsn;
 270
 271         s = dev->subdevices + 1;
 272         /* digital i/o subdevice */
 273         s->type = COMEDI_SUBD_DIO;
 274         s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
 275         s->n_chan = 8;
 276         s->maxdata = 1;
 277         s->range_table = &range_digital;
 278         s->insn_bits = atao_dio_insn_bits;
 279         s->insn_config = atao_dio_insn_config;
 280
 281         s = dev->subdevices + 2;
 282         /* caldac subdevice */
 283         s->type = COMEDI_SUBD_CALIB;
 284         s->subdev_flags = SDF_WRITABLE | SDF_INTERNAL;
 285         s->n_chan = 21;
 286         s->maxdata = 0xff;
 287         s->insn_read = atao_calib_insn_read;
 288         s->insn_write = atao_calib_insn_write;
 289
 290         s = dev->subdevices + 3;
 291         /* eeprom subdevice */
 292         /* s->type=COMEDI_SUBD_EEPROM; */
 293         s->type = COMEDI_SUBD_UNUSED;
 294
 295         atao_reset(dev);
 296
 297         printk(KERN_INFO "\n");
 298
 299         return 0;
 300 }
 301
 302 static int atao_detach(struct comedi_device *dev)
 303 {
 304         printk(KERN_INFO "comedi%d: atao: remove\n", dev->minor);
 305
 306         if (dev->iobase)
 307                 release_region(dev->iobase, ATAO_SIZE);
 308
 309         return 0;
 310 }
 311
 312 static void atao_reset(struct comedi_device *dev)
 313 {
 314         /* This is the reset sequence described in the manual */
 315
 316         devpriv->cfg1 = 0;
 317         outw(devpriv->cfg1, dev->iobase + ATAO_CFG1);
 318
 319         outb(RWSEL0 | MODESEL2, dev->iobase + ATAO_82C53_CNTRCMD);
 320         outb(0x03, dev->iobase + ATAO_82C53_CNTR1);
 321         outb(CNTRSEL0 | RWSEL0 | MODESEL2, dev->iobase + ATAO_82C53_CNTRCMD);
 322
 323         devpriv->cfg2 = 0;
 324         outw(devpriv->cfg2, dev->iobase + ATAO_CFG2);
 325
 326         devpriv->cfg3 = 0;
 327         outw(devpriv->cfg3, dev->iobase + ATAO_CFG3);
 328
 329         inw(dev->iobase + ATAO_FIFO_CLEAR);
 330
 331         devpriv->cfg1 |= GRP2WR;
 332         outw(devpriv->cfg1, dev->iobase + ATAO_CFG1);
 333
 334         outw(0, dev->iobase + ATAO_2_INT1CLR);
 335         outw(0, dev->iobase + ATAO_2_INT2CLR);
 336         outw(0, dev->iobase + ATAO_2_DMATCCLR);
 337
 338         devpriv->cfg1 &= ~GRP2WR;
 339         outw(devpriv->cfg1, dev->iobase + ATAO_CFG1);
 340 }
 341
 342 static int atao_ao_winsn(struct comedi_device *dev, struct comedi_subdevice *s,
 343                          struct comedi_insn *insn, unsigned int *data)
 344 {
 345         int i;
 346         int chan = CR_CHAN(insn->chanspec);
 347         short bits;
 348
 349         for (i = 0; i < insn->n; i++) {
 350                 bits = data[i] - 0x800;
 351                 if (chan == 0) {
 352                         devpriv->cfg1 |= GRP2WR;
 353                         outw(devpriv->cfg1, dev->iobase + ATAO_CFG1);
 354                 }
 355                 outw(bits, dev->iobase + ATAO_DACn(chan));
 356                 if (chan == 0) {
 357                         devpriv->cfg1 &= ~GRP2WR;
 358                         outw(devpriv->cfg1, dev->iobase + ATAO_CFG1);
 359                 }
 360                 devpriv->ao_readback[chan] = data[i];
 361         }
 362
 363         return i;
 364 }
 365
 366 static int atao_ao_rinsn(struct comedi_device *dev, struct comedi_subdevice *s,
 367                          struct comedi_insn *insn, unsigned int *data)
 368 {
 369         int i;
 370         int chan = CR_CHAN(insn->chanspec);
 371
 372         for (i = 0; i < insn->n; i++)
 373                 data[i] = devpriv->ao_readback[chan];
 374
 375         return i;
 376 }
 377
 378 static int atao_dio_insn_bits(struct comedi_device *dev,
 379                               struct comedi_subdevice *s,
 380                               struct comedi_insn *insn, unsigned int *data)
 381 {
 382         if (insn->n != 2)
 383                 return -EINVAL;
 384
 385         if (data[0]) {
 386                 s->state &= ~data[0];
 387                 s->state |= data[0] & data[1];
 388                 outw(s->state, dev->iobase + ATAO_DOUT);
 389         }
 390
 391         data[1] = inw(dev->iobase + ATAO_DIN);
 392
 393         return 2;
 394 }
 395
 396 static int atao_dio_insn_config(struct comedi_device *dev,
 397                                 struct comedi_subdevice *s,
 398                                 struct comedi_insn *insn, unsigned int *data)
 399 {
 400         int chan = CR_CHAN(insn->chanspec);
 401         unsigned int mask, bit;
 402
 403         /* The input or output configuration of each digital line is
 404          * configured by a special insn_config instruction.  chanspec
 405          * contains the channel to be changed, and data[0] contains the
 406          * value COMEDI_INPUT or COMEDI_OUTPUT. */
 407
 408         mask = (chan < 4) ? 0x0f : 0xf0;
 409         bit = (chan < 4) ? DOUTEN1 : DOUTEN2;
 410
 411         switch (data[0]) {
 412         case INSN_CONFIG_DIO_OUTPUT:
 413                 s->io_bits |= mask;
 414                 devpriv->cfg3 |= bit;
 415                 break;
 416         case INSN_CONFIG_DIO_INPUT:
 417                 s->io_bits &= ~mask;
 418                 devpriv->cfg3 &= ~bit;
 419                 break;
 420         case INSN_CONFIG_DIO_QUERY:
 421                 data[1] =
 422                     (s->io_bits & (1 << chan)) ? COMEDI_OUTPUT : COMEDI_INPUT;
 423                 return insn->n;
 424                 break;
 425         default:
 426                 return -EINVAL;
 427                 break;
 428         }
 429
 430         outw(devpriv->cfg3, dev->iobase + ATAO_CFG3);
 431
 432         return 1;
 433 }
 434
 435 /*
 436  * Figure 2-1 in the manual shows 3 chips labeled DAC8800, which
 437  * are 8-channel 8-bit DACs.  These are most likely the calibration
 438  * DACs.  It is not explicitly stated in the manual how to access
 439  * the caldacs, but we can guess.
 440  */
 441 static int atao_calib_insn_read(struct comedi_device *dev,
 442                                 struct comedi_subdevice *s,
 443                                 struct comedi_insn *insn, unsigned int *data)
 444 {
 445         int i;
 446         for (i = 0; i < insn->n; i++)
 447                 data[i] = 0;    /* XXX */
 448         return insn->n;
 449 }
 450
 451 static int atao_calib_insn_write(struct comedi_device *dev,
 452                                  struct comedi_subdevice *s,
 453                                  struct comedi_insn *insn, unsigned int *data)
 454 {
 455         unsigned int bitstring, bit;
 456         unsigned int chan = CR_CHAN(insn->chanspec);
 457
 458         bitstring = ((chan & 0x7) << 8) | (data[insn->n - 1] & 0xff);
 459
 460         for (bit = 1 << (11 - 1); bit; bit >>= 1) {
 461                 outw(devpriv->cfg2 | ((bit & bitstring) ? SDATA : 0),
 462                      dev->iobase + ATAO_CFG2);
 463                 outw(devpriv->cfg2 | SCLK | ((bit & bitstring) ? SDATA : 0),
 464                      dev->iobase + ATAO_CFG2);
 465         }
 466         /* strobe the appropriate caldac */
 467         outw(devpriv->cfg2 | (((chan >> 3) + 1) << 14),
 468              dev->iobase + ATAO_CFG2);
 469         outw(devpriv->cfg2, dev->iobase + ATAO_CFG2);
 470
 471         return insn->n;
 472 }
 473
 474 MODULE_AUTHOR("Comedi http://www.comedi.org");
 475 MODULE_DESCRIPTION("Comedi low-level driver");
 476 MODULE_LICENSE("GPL");