drivers/staging/comedi/drivers/dt3000.c

   1 /*
   2     comedi/drivers/dt3000.c
   3     Data Translation DT3000 series driver
   4
   5     COMEDI - Linux Control and Measurement Device Interface
   6     Copyright (C) 1999 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: dt3000
  25 Description: Data Translation DT3000 series
  26 Author: ds
  27 Devices: [Data Translation] DT3001 (dt3000), DT3001-PGL, DT3002, DT3003,
  28   DT3003-PGL, DT3004, DT3005, DT3004-200
  29 Updated: Mon, 14 Apr 2008 15:41:24 +0100
  30 Status: works
  31
  32 Configuration Options:
  33   [0] - PCI bus of device (optional)
  34   [1] - PCI slot of device (optional)
  35   If bus/slot is not specified, the first supported
  36   PCI device found will be used.
  37
  38 There is code to support AI commands, but it may not work.
  39
  40 AO commands are not supported.
  41 */
  42
  43 /*
  44    The DT3000 series is Data Translation's attempt to make a PCI
  45    data acquisition board.  The design of this series is very nice,
  46    since each board has an on-board DSP (Texas Instruments TMS320C52).
  47    However, a few details are a little annoying.  The boards lack
  48    bus-mastering DMA, which eliminates them from serious work.
  49    They also are not capable of autocalibration, which is a common
  50    feature in modern hardware.  The default firmware is pretty bad,
  51    making it nearly impossible to write an RT compatible driver.
  52    It would make an interesting project to write a decent firmware
  53    for these boards.
  54
  55    Data Translation originally wanted an NDA for the documentation
  56    for the 3k series.  However, if you ask nicely, they might send
  57    you the docs without one, also.
  58 */
  59
  60 #define DEBUG 1
  61
  62 #include <linux/interrupt.h>
  63 #include "../comedidev.h"
  64 #include <linux/delay.h>
  65
  66 #include "comedi_pci.h"
  67
  68 #define PCI_VENDOR_ID_DT        0x1116
  69
  70 static const struct comedi_lrange range_dt3000_ai = { 4, {
  71                                                           RANGE(-10, 10),
  72                                                           RANGE(-5, 5),
  73                                                           RANGE(-2.5, 2.5),
  74                                                           RANGE(-1.25, 1.25)
  75                                                           }
  76 };
  77
  78 static const struct comedi_lrange range_dt3000_ai_pgl = { 4, {
  79                                                               RANGE(-10, 10),
  80                                                               RANGE(-1, 1),
  81                                                               RANGE(-0.1, 0.1),
  82                                                               RANGE(-0.02, 0.02)
  83                                                               }
  84 };
  85
  86 struct dt3k_boardtype {
  87
  88         const char *name;
  89         unsigned int device_id;
  90         int adchan;
  91         int adbits;
  92         int ai_speed;
  93         const struct comedi_lrange *adrange;
  94         int dachan;
  95         int dabits;
  96 };
  97
  98 static const struct dt3k_boardtype dt3k_boardtypes[] = {
  99         {.name = "dt3001",
 100          .device_id = 0x22,
 101          .adchan = 16,
 102          .adbits = 12,
 103          .adrange = &range_dt3000_ai,
 104          .ai_speed = 3000,
 105          .dachan = 2,
 106          .dabits = 12,
 107          },
 108         {.name = "dt3001-pgl",
 109          .device_id = 0x27,
 110          .adchan = 16,
 111          .adbits = 12,
 112          .adrange = &range_dt3000_ai_pgl,
 113          .ai_speed = 3000,
 114          .dachan = 2,
 115          .dabits = 12,
 116          },
 117         {.name = "dt3002",
 118          .device_id = 0x23,
 119          .adchan = 32,
 120          .adbits = 12,
 121          .adrange = &range_dt3000_ai,
 122          .ai_speed = 3000,
 123          .dachan = 0,
 124          .dabits = 0,
 125          },
 126         {.name = "dt3003",
 127          .device_id = 0x24,
 128          .adchan = 64,
 129          .adbits = 12,
 130          .adrange = &range_dt3000_ai,
 131          .ai_speed = 3000,
 132          .dachan = 2,
 133          .dabits = 12,
 134          },
 135         {.name = "dt3003-pgl",
 136          .device_id = 0x28,
 137          .adchan = 64,
 138          .adbits = 12,
 139          .adrange = &range_dt3000_ai_pgl,
 140          .ai_speed = 3000,
 141          .dachan = 2,
 142          .dabits = 12,
 143          },
 144         {.name = "dt3004",
 145          .device_id = 0x25,
 146          .adchan = 16,
 147          .adbits = 16,
 148          .adrange = &range_dt3000_ai,
 149          .ai_speed = 10000,
 150          .dachan = 2,
 151          .dabits = 12,
 152          },
 153         {.name = "dt3005",      /* a.k.a. 3004-200 */
 154          .device_id = 0x26,
 155          .adchan = 16,
 156          .adbits = 16,
 157          .adrange = &range_dt3000_ai,
 158          .ai_speed = 5000,
 159          .dachan = 2,
 160          .dabits = 12,
 161          },
 162 };
 163
 164 #define n_dt3k_boards sizeof(dt3k_boardtypes)/sizeof(struct dt3k_boardtype)
 165 #define this_board ((const struct dt3k_boardtype *)dev->board_ptr)
 166
 167 static DEFINE_PCI_DEVICE_TABLE(dt3k_pci_table) = {
 168         {
 169         PCI_VENDOR_ID_DT, 0x0022, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {
 170         PCI_VENDOR_ID_DT, 0x0027, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {
 171         PCI_VENDOR_ID_DT, 0x0023, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {
 172         PCI_VENDOR_ID_DT, 0x0024, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {
 173         PCI_VENDOR_ID_DT, 0x0028, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {
 174         PCI_VENDOR_ID_DT, 0x0025, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {
 175         PCI_VENDOR_ID_DT, 0x0026, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0}, {
 176         0}
 177 };
 178
 179 MODULE_DEVICE_TABLE(pci, dt3k_pci_table);
 180
 181 #define DT3000_SIZE             (4*0x1000)
 182
 183 /* dual-ported RAM location definitions */
 184
 185 #define DPR_DAC_buffer          (4*0x000)
 186 #define DPR_ADC_buffer          (4*0x800)
 187 #define DPR_Command             (4*0xfd3)
 188 #define DPR_SubSys              (4*0xfd3)
 189 #define DPR_Encode              (4*0xfd4)
 190 #define DPR_Params(a)           (4*(0xfd5+(a)))
 191 #define DPR_Tick_Reg_Lo         (4*0xff5)
 192 #define DPR_Tick_Reg_Hi         (4*0xff6)
 193 #define DPR_DA_Buf_Front        (4*0xff7)
 194 #define DPR_DA_Buf_Rear         (4*0xff8)
 195 #define DPR_AD_Buf_Front        (4*0xff9)
 196 #define DPR_AD_Buf_Rear         (4*0xffa)
 197 #define DPR_Int_Mask            (4*0xffb)
 198 #define DPR_Intr_Flag           (4*0xffc)
 199 #define DPR_Response_Mbx        (4*0xffe)
 200 #define DPR_Command_Mbx         (4*0xfff)
 201
 202 #define AI_FIFO_DEPTH   2003
 203 #define AO_FIFO_DEPTH   2048
 204
 205 /* command list */
 206
 207 #define CMD_GETBRDINFO          0
 208 #define CMD_CONFIG              1
 209 #define CMD_GETCONFIG           2
 210 #define CMD_START               3
 211 #define CMD_STOP                4
 212 #define CMD_READSINGLE          5
 213 #define CMD_WRITESINGLE         6
 214 #define CMD_CALCCLOCK           7
 215 #define CMD_READEVENTS          8
 216 #define CMD_WRITECTCTRL         16
 217 #define CMD_READCTCTRL          17
 218 #define CMD_WRITECT             18
 219 #define CMD_READCT              19
 220 #define CMD_WRITEDATA           32
 221 #define CMD_READDATA            33
 222 #define CMD_WRITEIO             34
 223 #define CMD_READIO              35
 224 #define CMD_WRITECODE           36
 225 #define CMD_READCODE            37
 226 #define CMD_EXECUTE             38
 227 #define CMD_HALT                48
 228
 229 #define SUBS_AI         0
 230 #define SUBS_AO         1
 231 #define SUBS_DIN        2
 232 #define SUBS_DOUT       3
 233 #define SUBS_MEM        4
 234 #define SUBS_CT         5
 235
 236 /* interrupt flags */
 237 #define DT3000_CMDONE           0x80
 238 #define DT3000_CTDONE           0x40
 239 #define DT3000_DAHWERR          0x20
 240 #define DT3000_DASWERR          0x10
 241 #define DT3000_DAEMPTY          0x08
 242 #define DT3000_ADHWERR          0x04
 243 #define DT3000_ADSWERR          0x02
 244 #define DT3000_ADFULL           0x01
 245
 246 #define DT3000_COMPLETION_MASK  0xff00
 247 #define DT3000_COMMAND_MASK     0x00ff
 248 #define DT3000_NOTPROCESSED     0x0000
 249 #define DT3000_NOERROR          0x5500
 250 #define DT3000_ERROR            0xaa00
 251 #define DT3000_NOTSUPPORTED     0xff00
 252
 253 #define DT3000_EXTERNAL_CLOCK   1
 254 #define DT3000_RISING_EDGE      2
 255
 256 #define TMODE_MASK              0x1c
 257
 258 #define DT3000_AD_TRIG_INTERNAL         (0<<2)
 259 #define DT3000_AD_TRIG_EXTERNAL         (1<<2)
 260 #define DT3000_AD_RETRIG_INTERNAL       (2<<2)
 261 #define DT3000_AD_RETRIG_EXTERNAL       (3<<2)
 262 #define DT3000_AD_EXTRETRIG             (4<<2)
 263
 264 #define DT3000_CHANNEL_MODE_SE          0
 265 #define DT3000_CHANNEL_MODE_DI          1
 266
 267 struct dt3k_private {
 268
 269         struct pci_dev *pci_dev;
 270         resource_size_t phys_addr;
 271         void *io_addr;
 272         unsigned int lock;
 273         unsigned int ao_readback[2];
 274         unsigned int ai_front;
 275         unsigned int ai_rear;
 276 };
 277
 278 #define devpriv ((struct dt3k_private *)dev->private)
 279
 280 static int dt3000_attach(struct comedi_device *dev,
 281                          struct comedi_devconfig *it);
 282 static int dt3000_detach(struct comedi_device *dev);
 283 static struct comedi_driver driver_dt3000 = {
 284         .driver_name = "dt3000",
 285         .module = THIS_MODULE,
 286         .attach = dt3000_attach,
 287         .detach = dt3000_detach,
 288 };
 289
 290 COMEDI_PCI_INITCLEANUP(driver_dt3000, dt3k_pci_table);
 291
 292 static void dt3k_ai_empty_fifo(struct comedi_device *dev,
 293                                struct comedi_subdevice *s);
 294 static int dt3k_ns_to_timer(unsigned int timer_base, unsigned int *arg,
 295                             unsigned int round_mode);
 296 static int dt3k_ai_cancel(struct comedi_device *dev,
 297                           struct comedi_subdevice *s);
 298 #ifdef DEBUG
 299 static void debug_intr_flags(unsigned int flags);
 300 #endif
 301
 302 #define TIMEOUT 100
 303
 304 static int dt3k_send_cmd(struct comedi_device *dev, unsigned int cmd)
 305 {
 306         int i;
 307         unsigned int status = 0;
 308
 309         writew(cmd, devpriv->io_addr + DPR_Command_Mbx);
 310
 311         for (i = 0; i < TIMEOUT; i++) {
 312                 status = readw(devpriv->io_addr + DPR_Command_Mbx);
 313                 if ((status & DT3000_COMPLETION_MASK) != DT3000_NOTPROCESSED)
 314                         break;
 315                 udelay(1);
 316         }
 317         if ((status & DT3000_COMPLETION_MASK) == DT3000_NOERROR) {
 318                 return 0;
 319         }
 320
 321         printk("dt3k_send_cmd() timeout/error status=0x%04x\n", status);
 322
 323         return -ETIME;
 324 }
 325
 326 static unsigned int dt3k_readsingle(struct comedi_device *dev,
 327                                     unsigned int subsys, unsigned int chan,
 328                                     unsigned int gain)
 329 {
 330         writew(subsys, devpriv->io_addr + DPR_SubSys);
 331
 332         writew(chan, devpriv->io_addr + DPR_Params(0));
 333         writew(gain, devpriv->io_addr + DPR_Params(1));
 334
 335         dt3k_send_cmd(dev, CMD_READSINGLE);
 336
 337         return readw(devpriv->io_addr + DPR_Params(2));
 338 }
 339
 340 static void dt3k_writesingle(struct comedi_device *dev, unsigned int subsys,
 341                              unsigned int chan, unsigned int data)
 342 {
 343         writew(subsys, devpriv->io_addr + DPR_SubSys);
 344
 345         writew(chan, devpriv->io_addr + DPR_Params(0));
 346         writew(0, devpriv->io_addr + DPR_Params(1));
 347         writew(data, devpriv->io_addr + DPR_Params(2));
 348
 349         dt3k_send_cmd(dev, CMD_WRITESINGLE);
 350 }
 351
 352 static int debug_n_ints = 0;
 353
 354 /* FIXME! Assumes shared interrupt is for this card. */
 355 /* What's this debug_n_ints stuff? Obviously needs some work... */
 356 static irqreturn_t dt3k_interrupt(int irq, void *d)
 357 {
 358         struct comedi_device *dev = d;
 359         struct comedi_subdevice *s;
 360         unsigned int status;
 361
 362         if (!dev->attached) {
 363                 return IRQ_NONE;
 364         }
 365
 366         s = dev->subdevices + 0;
 367         status = readw(devpriv->io_addr + DPR_Intr_Flag);
 368 #ifdef DEBUG
 369         debug_intr_flags(status);
 370 #endif
 371
 372         if (status & DT3000_ADFULL) {
 373                 dt3k_ai_empty_fifo(dev, s);
 374                 s->async->events |= COMEDI_CB_BLOCK;
 375         }
 376
 377         if (status & (DT3000_ADSWERR | DT3000_ADHWERR)) {
 378                 s->async->events |= COMEDI_CB_ERROR | COMEDI_CB_EOA;
 379         }
 380
 381         debug_n_ints++;
 382         if (debug_n_ints >= 10) {
 383                 dt3k_ai_cancel(dev, s);
 384                 s->async->events |= COMEDI_CB_EOA;
 385         }
 386
 387         comedi_event(dev, s);
 388         return IRQ_HANDLED;
 389 }
 390
 391 #ifdef DEBUG
 392 static char *intr_flags[] = {
 393         "AdFull", "AdSwError", "AdHwError", "DaEmpty",
 394         "DaSwError", "DaHwError", "CtDone", "CmDone",
 395 };
 396
 397 static void debug_intr_flags(unsigned int flags)
 398 {
 399         int i;
 400         printk("dt3k: intr_flags:");
 401         for (i = 0; i < 8; i++) {
 402                 if (flags & (1 << i)) {
 403                         printk(" %s", intr_flags[i]);
 404                 }
 405         }
 406         printk("\n");
 407 }
 408 #endif
 409
 410 static void dt3k_ai_empty_fifo(struct comedi_device *dev,
 411                                struct comedi_subdevice *s)
 412 {
 413         int front;
 414         int rear;
 415         int count;
 416         int i;
 417         short data;
 418
 419         front = readw(devpriv->io_addr + DPR_AD_Buf_Front);
 420         count = front - devpriv->ai_front;
 421         if (count < 0)
 422                 count += AI_FIFO_DEPTH;
 423
 424         printk("reading %d samples\n", count);
 425
 426         rear = devpriv->ai_rear;
 427
 428         for (i = 0; i < count; i++) {
 429                 data = readw(devpriv->io_addr + DPR_ADC_buffer + rear);
 430                 comedi_buf_put(s->async, data);
 431                 rear++;
 432                 if (rear >= AI_FIFO_DEPTH)
 433                         rear = 0;
 434         }
 435
 436         devpriv->ai_rear = rear;
 437         writew(rear, devpriv->io_addr + DPR_AD_Buf_Rear);
 438 }
 439
 440 static int dt3k_ai_cmdtest(struct comedi_device *dev,
 441                            struct comedi_subdevice *s, struct comedi_cmd *cmd)
 442 {
 443         int err = 0;
 444         int tmp;
 445
 446         /* step 1: make sure trigger sources are trivially valid */
 447
 448         tmp = cmd->start_src;
 449         cmd->start_src &= TRIG_NOW;
 450         if (!cmd->start_src || tmp != cmd->start_src)
 451                 err++;
 452
 453         tmp = cmd->scan_begin_src;
 454         cmd->scan_begin_src &= TRIG_TIMER;
 455         if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
 456                 err++;
 457
 458         tmp = cmd->convert_src;
 459         cmd->convert_src &= TRIG_TIMER;
 460         if (!cmd->convert_src || tmp != cmd->convert_src)
 461                 err++;
 462
 463         tmp = cmd->scan_end_src;
 464         cmd->scan_end_src &= TRIG_COUNT;
 465         if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
 466                 err++;
 467
 468         tmp = cmd->stop_src;
 469         cmd->stop_src &= TRIG_COUNT;
 470         if (!cmd->stop_src || tmp != cmd->stop_src)
 471                 err++;
 472
 473         if (err)
 474                 return 1;
 475
 476         /* step 2: make sure trigger sources are unique and mutually compatible */
 477
 478         if (err)
 479                 return 2;
 480
 481         /* step 3: make sure arguments are trivially compatible */
 482
 483         if (cmd->start_arg != 0) {
 484                 cmd->start_arg = 0;
 485                 err++;
 486         }
 487
 488         if (cmd->scan_begin_src == TRIG_TIMER) {
 489                 if (cmd->scan_begin_arg < this_board->ai_speed) {
 490                         cmd->scan_begin_arg = this_board->ai_speed;
 491                         err++;
 492                 }
 493                 if (cmd->scan_begin_arg > 100 * 16 * 65535) {
 494                         cmd->scan_begin_arg = 100 * 16 * 65535;
 495                         err++;
 496                 }
 497         } else {
 498                 /* not supported */
 499         }
 500         if (cmd->convert_src == TRIG_TIMER) {
 501                 if (cmd->convert_arg < this_board->ai_speed) {
 502                         cmd->convert_arg = this_board->ai_speed;
 503                         err++;
 504                 }
 505                 if (cmd->convert_arg > 50 * 16 * 65535) {
 506                         cmd->convert_arg = 50 * 16 * 65535;
 507                         err++;
 508                 }
 509         } else {
 510                 /* not supported */
 511         }
 512
 513         if (cmd->scan_end_arg != cmd->chanlist_len) {
 514                 cmd->scan_end_arg = cmd->chanlist_len;
 515                 err++;
 516         }
 517         if (cmd->stop_src == TRIG_COUNT) {
 518                 if (cmd->stop_arg > 0x00ffffff) {
 519                         cmd->stop_arg = 0x00ffffff;
 520                         err++;
 521                 }
 522         } else {
 523                 /* TRIG_NONE */
 524                 if (cmd->stop_arg != 0) {
 525                         cmd->stop_arg = 0;
 526                         err++;
 527                 }
 528         }
 529
 530         if (err)
 531                 return 3;
 532
 533         /* step 4: fix up any arguments */
 534
 535         if (cmd->scan_begin_src == TRIG_TIMER) {
 536                 tmp = cmd->scan_begin_arg;
 537                 dt3k_ns_to_timer(100, &cmd->scan_begin_arg,
 538                                  cmd->flags & TRIG_ROUND_MASK);
 539                 if (tmp != cmd->scan_begin_arg)
 540                         err++;
 541         } else {
 542                 /* not supported */
 543         }
 544         if (cmd->convert_src == TRIG_TIMER) {
 545                 tmp = cmd->convert_arg;
 546                 dt3k_ns_to_timer(50, &cmd->convert_arg,
 547                                  cmd->flags & TRIG_ROUND_MASK);
 548                 if (tmp != cmd->convert_arg)
 549                         err++;
 550                 if (cmd->scan_begin_src == TRIG_TIMER &&
 551                     cmd->scan_begin_arg <
 552                     cmd->convert_arg * cmd->scan_end_arg) {
 553                         cmd->scan_begin_arg =
 554                             cmd->convert_arg * cmd->scan_end_arg;
 555                         err++;
 556                 }
 557         } else {
 558                 /* not supported */
 559         }
 560
 561         if (err)
 562                 return 4;
 563
 564         return 0;
 565 }
 566
 567 static int dt3k_ns_to_timer(unsigned int timer_base, unsigned int *nanosec,
 568                             unsigned int round_mode)
 569 {
 570         int divider, base, prescale;
 571
 572         /* This function needs improvment */
 573         /* Don't know if divider==0 works. */
 574
 575         for (prescale = 0; prescale < 16; prescale++) {
 576                 base = timer_base * (prescale + 1);
 577                 switch (round_mode) {
 578                 case TRIG_ROUND_NEAREST:
 579                 default:
 580                         divider = (*nanosec + base / 2) / base;
 581                         break;
 582                 case TRIG_ROUND_DOWN:
 583                         divider = (*nanosec) / base;
 584                         break;
 585                 case TRIG_ROUND_UP:
 586                         divider = (*nanosec) / base;
 587                         break;
 588                 }
 589                 if (divider < 65536) {
 590                         *nanosec = divider * base;
 591                         return (prescale << 16) | (divider);
 592                 }
 593         }
 594
 595         prescale = 15;
 596         base = timer_base * (1 << prescale);
 597         divider = 65535;
 598         *nanosec = divider * base;
 599         return (prescale << 16) | (divider);
 600 }
 601
 602 static int dt3k_ai_cmd(struct comedi_device *dev, struct comedi_subdevice *s)
 603 {
 604         struct comedi_cmd *cmd = &s->async->cmd;
 605         int i;
 606         unsigned int chan, range, aref;
 607         unsigned int divider;
 608         unsigned int tscandiv;
 609         int ret;
 610         unsigned int mode;
 611
 612         printk("dt3k_ai_cmd:\n");
 613         for (i = 0; i < cmd->chanlist_len; i++) {
 614                 chan = CR_CHAN(cmd->chanlist[i]);
 615                 range = CR_RANGE(cmd->chanlist[i]);
 616
 617                 writew((range << 6) | chan,
 618                        devpriv->io_addr + DPR_ADC_buffer + i);
 619         }
 620         aref = CR_AREF(cmd->chanlist[0]);
 621
 622         writew(cmd->scan_end_arg, devpriv->io_addr + DPR_Params(0));
 623         printk("param[0]=0x%04x\n", cmd->scan_end_arg);
 624
 625         if (cmd->convert_src == TRIG_TIMER) {
 626                 divider = dt3k_ns_to_timer(50, &cmd->convert_arg,
 627                                            cmd->flags & TRIG_ROUND_MASK);
 628                 writew((divider >> 16), devpriv->io_addr + DPR_Params(1));
 629                 printk("param[1]=0x%04x\n", divider >> 16);
 630                 writew((divider & 0xffff), devpriv->io_addr + DPR_Params(2));
 631                 printk("param[2]=0x%04x\n", divider & 0xffff);
 632         } else {
 633                 /* not supported */
 634         }
 635
 636         if (cmd->scan_begin_src == TRIG_TIMER) {
 637                 tscandiv = dt3k_ns_to_timer(100, &cmd->scan_begin_arg,
 638                                             cmd->flags & TRIG_ROUND_MASK);
 639                 writew((tscandiv >> 16), devpriv->io_addr + DPR_Params(3));
 640                 printk("param[3]=0x%04x\n", tscandiv >> 16);
 641                 writew((tscandiv & 0xffff), devpriv->io_addr + DPR_Params(4));
 642                 printk("param[4]=0x%04x\n", tscandiv & 0xffff);
 643         } else {
 644                 /* not supported */
 645         }
 646
 647         mode = DT3000_AD_RETRIG_INTERNAL | 0 | 0;
 648         writew(mode, devpriv->io_addr + DPR_Params(5));
 649         printk("param[5]=0x%04x\n", mode);
 650         writew(aref == AREF_DIFF, devpriv->io_addr + DPR_Params(6));
 651         printk("param[6]=0x%04x\n", aref == AREF_DIFF);
 652
 653         writew(AI_FIFO_DEPTH / 2, devpriv->io_addr + DPR_Params(7));
 654         printk("param[7]=0x%04x\n", AI_FIFO_DEPTH / 2);
 655
 656         writew(SUBS_AI, devpriv->io_addr + DPR_SubSys);
 657         ret = dt3k_send_cmd(dev, CMD_CONFIG);
 658
 659         writew(DT3000_ADFULL | DT3000_ADSWERR | DT3000_ADHWERR,
 660                devpriv->io_addr + DPR_Int_Mask);
 661
 662         debug_n_ints = 0;
 663
 664         writew(SUBS_AI, devpriv->io_addr + DPR_SubSys);
 665         ret = dt3k_send_cmd(dev, CMD_START);
 666
 667         return 0;
 668 }
 669
 670 static int dt3k_ai_cancel(struct comedi_device *dev, struct comedi_subdevice *s)
 671 {
 672         int ret;
 673
 674         writew(SUBS_AI, devpriv->io_addr + DPR_SubSys);
 675         ret = dt3k_send_cmd(dev, CMD_STOP);
 676
 677         writew(0, devpriv->io_addr + DPR_Int_Mask);
 678
 679         return 0;
 680 }
 681
 682 static int dt3k_ai_insn(struct comedi_device *dev, struct comedi_subdevice *s,
 683                         struct comedi_insn *insn, unsigned int *data)
 684 {
 685         int i;
 686         unsigned int chan, gain, aref;
 687
 688         chan = CR_CHAN(insn->chanspec);
 689         gain = CR_RANGE(insn->chanspec);
 690         /* XXX docs don't explain how to select aref */
 691         aref = CR_AREF(insn->chanspec);
 692
 693         for (i = 0; i < insn->n; i++) {
 694                 data[i] = dt3k_readsingle(dev, SUBS_AI, chan, gain);
 695         }
 696
 697         return i;
 698 }
 699
 700 static int dt3k_ao_insn(struct comedi_device *dev, struct comedi_subdevice *s,
 701                         struct comedi_insn *insn, unsigned int *data)
 702 {
 703         int i;
 704         unsigned int chan;
 705
 706         chan = CR_CHAN(insn->chanspec);
 707         for (i = 0; i < insn->n; i++) {
 708                 dt3k_writesingle(dev, SUBS_AO, chan, data[i]);
 709                 devpriv->ao_readback[chan] = data[i];
 710         }
 711
 712         return i;
 713 }
 714
 715 static int dt3k_ao_insn_read(struct comedi_device *dev,
 716                              struct comedi_subdevice *s,
 717                              struct comedi_insn *insn, unsigned int *data)
 718 {
 719         int i;
 720         unsigned int chan;
 721
 722         chan = CR_CHAN(insn->chanspec);
 723         for (i = 0; i < insn->n; i++) {
 724                 data[i] = devpriv->ao_readback[chan];
 725         }
 726
 727         return i;
 728 }
 729
 730 static void dt3k_dio_config(struct comedi_device *dev, int bits)
 731 {
 732         /* XXX */
 733         writew(SUBS_DOUT, devpriv->io_addr + DPR_SubSys);
 734
 735         writew(bits, devpriv->io_addr + DPR_Params(0));
 736 #if 0
 737         /* don't know */
 738         writew(0, devpriv->io_addr + DPR_Params(1));
 739         writew(0, devpriv->io_addr + DPR_Params(2));
 740 #endif
 741
 742         dt3k_send_cmd(dev, CMD_CONFIG);
 743 }
 744
 745 static int dt3k_dio_insn_config(struct comedi_device *dev,
 746                                 struct comedi_subdevice *s,
 747                                 struct comedi_insn *insn, unsigned int *data)
 748 {
 749         int mask;
 750
 751         mask = (CR_CHAN(insn->chanspec) < 4) ? 0x0f : 0xf0;
 752
 753         switch (data[0]) {
 754         case INSN_CONFIG_DIO_OUTPUT:
 755                 s->io_bits |= mask;
 756                 break;
 757         case INSN_CONFIG_DIO_INPUT:
 758                 s->io_bits &= ~mask;
 759                 break;
 760         case INSN_CONFIG_DIO_QUERY:
 761                 data[1] =
 762                     (s->
 763                      io_bits & (1 << CR_CHAN(insn->chanspec))) ? COMEDI_OUTPUT :
 764                     COMEDI_INPUT;
 765                 return insn->n;
 766                 break;
 767         default:
 768                 return -EINVAL;
 769                 break;
 770         }
 771         mask = (s->io_bits & 0x01) | ((s->io_bits & 0x10) >> 3);
 772         dt3k_dio_config(dev, mask);
 773
 774         return insn->n;
 775 }
 776
 777 static int dt3k_dio_insn_bits(struct comedi_device *dev,
 778                               struct comedi_subdevice *s,
 779                               struct comedi_insn *insn, unsigned int *data)
 780 {
 781         if (insn->n != 2)
 782                 return -EINVAL;
 783
 784         if (data[0]) {
 785                 s->state &= ~data[0];
 786                 s->state |= data[1] & data[0];
 787                 dt3k_writesingle(dev, SUBS_DOUT, 0, s->state);
 788         }
 789         data[1] = dt3k_readsingle(dev, SUBS_DIN, 0, 0);
 790
 791         return 2;
 792 }
 793
 794 static int dt3k_mem_insn_read(struct comedi_device *dev,
 795                               struct comedi_subdevice *s,
 796                               struct comedi_insn *insn, unsigned int *data)
 797 {
 798         unsigned int addr = CR_CHAN(insn->chanspec);
 799         int i;
 800
 801         for (i = 0; i < insn->n; i++) {
 802                 writew(SUBS_MEM, devpriv->io_addr + DPR_SubSys);
 803                 writew(addr, devpriv->io_addr + DPR_Params(0));
 804                 writew(1, devpriv->io_addr + DPR_Params(1));
 805
 806                 dt3k_send_cmd(dev, CMD_READCODE);
 807
 808                 data[i] = readw(devpriv->io_addr + DPR_Params(2));
 809         }
 810
 811         return i;
 812 }
 813
 814 static int dt_pci_probe(struct comedi_device *dev, int bus, int slot);
 815
 816 static int dt3000_attach(struct comedi_device *dev, struct comedi_devconfig *it)
 817 {
 818         struct comedi_subdevice *s;
 819         int bus, slot;
 820         int ret = 0;
 821
 822         printk("dt3000:");
 823         bus = it->options[0];
 824         slot = it->options[1];
 825
 826         ret = alloc_private(dev, sizeof(struct dt3k_private));
 827         if (ret < 0)
 828                 return ret;
 829
 830         ret = dt_pci_probe(dev, bus, slot);
 831         if (ret < 0)
 832                 return ret;
 833         if (ret == 0) {
 834                 printk(" no DT board found\n");
 835                 return -ENODEV;
 836         }
 837
 838         dev->board_name = this_board->name;
 839
 840         if (request_irq(devpriv->pci_dev->irq, dt3k_interrupt, IRQF_SHARED,
 841                         "dt3000", dev)) {
 842                 printk(" unable to allocate IRQ %u\n", devpriv->pci_dev->irq);
 843                 return -EINVAL;
 844         }
 845         dev->irq = devpriv->pci_dev->irq;
 846
 847         ret = alloc_subdevices(dev, 4);
 848         if (ret < 0)
 849                 return ret;
 850
 851         s = dev->subdevices;
 852         dev->read_subdev = s;
 853
 854         /* ai subdevice */
 855         s->type = COMEDI_SUBD_AI;
 856         s->subdev_flags = SDF_READABLE | SDF_GROUND | SDF_DIFF | SDF_CMD_READ;
 857         s->n_chan = this_board->adchan;
 858         s->insn_read = dt3k_ai_insn;
 859         s->maxdata = (1 << this_board->adbits) - 1;
 860         s->len_chanlist = 512;
 861         s->range_table = &range_dt3000_ai;      /* XXX */
 862         s->do_cmd = dt3k_ai_cmd;
 863         s->do_cmdtest = dt3k_ai_cmdtest;
 864         s->cancel = dt3k_ai_cancel;
 865
 866         s++;
 867         /* ao subsystem */
 868         s->type = COMEDI_SUBD_AO;
 869         s->subdev_flags = SDF_WRITABLE;
 870         s->n_chan = 2;
 871         s->insn_read = dt3k_ao_insn_read;
 872         s->insn_write = dt3k_ao_insn;
 873         s->maxdata = (1 << this_board->dabits) - 1;
 874         s->len_chanlist = 1;
 875         s->range_table = &range_bipolar10;
 876
 877         s++;
 878         /* dio subsystem */
 879         s->type = COMEDI_SUBD_DIO;
 880         s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
 881         s->n_chan = 8;
 882         s->insn_config = dt3k_dio_insn_config;
 883         s->insn_bits = dt3k_dio_insn_bits;
 884         s->maxdata = 1;
 885         s->len_chanlist = 8;
 886         s->range_table = &range_digital;
 887
 888         s++;
 889         /* mem subsystem */
 890         s->type = COMEDI_SUBD_MEMORY;
 891         s->subdev_flags = SDF_READABLE;
 892         s->n_chan = 0x1000;
 893         s->insn_read = dt3k_mem_insn_read;
 894         s->maxdata = 0xff;
 895         s->len_chanlist = 1;
 896         s->range_table = &range_unknown;
 897
 898 #if 0
 899         s++;
 900         /* proc subsystem */
 901         s->type = COMEDI_SUBD_PROC;
 902 #endif
 903
 904         return 0;
 905 }
 906
 907 static int dt3000_detach(struct comedi_device *dev)
 908 {
 909         if (dev->irq)
 910                 free_irq(dev->irq, dev);
 911
 912         if (devpriv) {
 913                 if (devpriv->pci_dev) {
 914                         if (devpriv->phys_addr) {
 915                                 comedi_pci_disable(devpriv->pci_dev);
 916                         }
 917                         pci_dev_put(devpriv->pci_dev);
 918                 }
 919                 if (devpriv->io_addr)
 920                         iounmap(devpriv->io_addr);
 921         }
 922         /* XXX */
 923
 924         return 0;
 925 }
 926
 927 static struct pci_dev *dt_pci_find_device(struct pci_dev *from, int *board);
 928 static int setup_pci(struct comedi_device *dev);
 929
 930 static int dt_pci_probe(struct comedi_device *dev, int bus, int slot)
 931 {
 932         int board;
 933         int ret;
 934         struct pci_dev *pcidev;
 935
 936         pcidev = NULL;
 937         while ((pcidev = dt_pci_find_device(pcidev, &board)) != NULL) {
 938                 if ((bus == 0 && slot == 0) ||
 939                     (pcidev->bus->number == bus &&
 940                      PCI_SLOT(pcidev->devfn) == slot)) {
 941                         break;
 942                 }
 943         }
 944         devpriv->pci_dev = pcidev;
 945
 946         if (board >= 0)
 947                 dev->board_ptr = dt3k_boardtypes + board;
 948
 949         if (!devpriv->pci_dev)
 950                 return 0;
 951
 952         ret = setup_pci(dev);
 953         if (ret < 0)
 954                 return ret;
 955
 956         return 1;
 957 }
 958
 959 static int setup_pci(struct comedi_device *dev)
 960 {
 961         resource_size_t addr;
 962         int ret;
 963
 964         ret = comedi_pci_enable(devpriv->pci_dev, "dt3000");
 965         if (ret < 0)
 966                 return ret;
 967
 968         addr = pci_resource_start(devpriv->pci_dev, 0);
 969         devpriv->phys_addr = addr;
 970         devpriv->io_addr = ioremap(devpriv->phys_addr, DT3000_SIZE);
 971         if (!devpriv->io_addr)
 972                 return -ENOMEM;
 973 #if DEBUG
 974         printk("0x%08llx mapped to %p, ",
 975                (unsigned long long)devpriv->phys_addr, devpriv->io_addr);
 976 #endif
 977
 978         return 0;
 979 }
 980
 981 static struct pci_dev *dt_pci_find_device(struct pci_dev *from, int *board)
 982 {
 983         int i;
 984
 985         for (from = pci_get_device(PCI_VENDOR_ID_DT, PCI_ANY_ID, from);
 986              from != NULL;
 987              from = pci_get_device(PCI_VENDOR_ID_DT, PCI_ANY_ID, from)) {
 988                 for (i = 0; i < n_dt3k_boards; i++) {
 989                         if (from->device == dt3k_boardtypes[i].device_id) {
 990                                 *board = i;
 991                                 return from;
 992                         }
 993                 }
 994                 printk
 995                     ("unknown Data Translation PCI device found with device_id=0x%04x\n",
 996                      from->device);
 997         }
 998         *board = -1;
 999         return from;
1000 }