drivers/staging/comedi/drivers/ni_atmio.c

   1 /*
   2     comedi/drivers/ni_atmio.c
   3     Hardware driver for NI AT-MIO E series cards
   4
   5     COMEDI - Linux Control and Measurement Device Interface
   6     Copyright (C) 1997-2001 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 Driver: ni_atmio
  24 Description: National Instruments AT-MIO-E series
  25 Author: ds
  26 Devices: [National Instruments] AT-MIO-16E-1 (ni_atmio),
  27   AT-MIO-16E-2, AT-MIO-16E-10, AT-MIO-16DE-10, AT-MIO-64E-3,
  28   AT-MIO-16XE-50, AT-MIO-16XE-10, AT-AI-16XE-10
  29 Status: works
  30 Updated: Thu May  1 20:03:02 CDT 2003
  31
  32 The driver has 2.6 kernel isapnp support, and
  33 will automatically probe for a supported board if the
  34 I/O base is left unspecified with comedi_config.
  35 However, many of
  36 the isapnp id numbers are unknown.  If your board is not
  37 recognized, please send the output of 'cat /proc/isapnp'
  38 (you may need to modprobe the isa-pnp module for
  39 /proc/isapnp to exist) so the
  40 id numbers for your board can be added to the driver.
  41
  42 Otherwise, you can use the isapnptools package to configure
  43 your board.  Use isapnp to
  44 configure the I/O base and IRQ for the board, and then pass
  45 the same values as
  46 parameters in comedi_config.  A sample isapnp.conf file is included
  47 in the etc/ directory of Comedilib.
  48
  49 Comedilib includes a utility to autocalibrate these boards.  The
  50 boards seem to boot into a state where the all calibration DACs
  51 are at one extreme of their range, thus the default calibration
  52 is terrible.  Calibration at boot is strongly encouraged.
  53
  54 To use the extended digital I/O on some of the boards, enable the
  55 8255 driver when configuring the Comedi source tree.
  56
  57 External triggering is supported for some events.  The channel index
  58 (scan_begin_arg, etc.) maps to PFI0 - PFI9.
  59
  60 Some of the more esoteric triggering possibilities of these boards
  61 are not supported.
  62 */
  63 /*
  64         The real guts of the driver is in ni_mio_common.c, which is included
  65         both here and in ni_pcimio.c
  66
  67         Interrupt support added by Truxton Fulton <trux@truxton.com>
  68
  69         References for specifications:
  70
  71            340747b.pdf  Register Level Programmer Manual (obsolete)
  72            340747c.pdf  Register Level Programmer Manual (new)
  73            DAQ-STC reference manual
  74
  75         Other possibly relevant info:
  76
  77            320517c.pdf  User manual (obsolete)
  78            320517f.pdf  User manual (new)
  79            320889a.pdf  delete
  80            320906c.pdf  maximum signal ratings
  81            321066a.pdf  about 16x
  82            321791a.pdf  discontinuation of at-mio-16e-10 rev. c
  83            321808a.pdf  about at-mio-16e-10 rev P
  84            321837a.pdf  discontinuation of at-mio-16de-10 rev d
  85            321838a.pdf  about at-mio-16de-10 rev N
  86
  87         ISSUES:
  88
  89         need to deal with external reference for DAC, and other DAC
  90         properties in board properties
  91
  92         deal with at-mio-16de-10 revision D to N changes, etc.
  93
  94 */
  95
  96 #include <linux/interrupt.h>
  97 #include "../comedidev.h"
  98
  99 #include <linux/delay.h>
 100 #include <linux/isapnp.h>
 101
 102 #include "ni_stc.h"
 103 #include "8255.h"
 104
 105 #undef DEBUG
 106
 107 #define ATMIO 1
 108 #undef PCIMIO
 109
 110 /*
 111  *  AT specific setup
 112  */
 113
 114 #define NI_SIZE 0x20
 115
 116 #define MAX_N_CALDACS 32
 117
 118 static const struct ni_board_struct ni_boards[] = {
 119         {.device_id = 44,
 120          .isapnp_id = 0x0000,   /* XXX unknown */
 121          .name = "at-mio-16e-1",
 122          .n_adchan = 16,
 123          .adbits = 12,
 124          .ai_fifo_depth = 8192,
 125          .alwaysdither = 0,
 126          .gainlkup = ai_gain_16,
 127          .ai_speed = 800,
 128          .n_aochan = 2,
 129          .aobits = 12,
 130          .ao_fifo_depth = 2048,
 131          .ao_range_table = &range_ni_E_ao_ext,
 132          .ao_unipolar = 1,
 133          .ao_speed = 1000,
 134          .has_8255 = 0,
 135          .num_p0_dio_channels = 8,
 136          .caldac = {mb88341},
 137          },
 138         {.device_id = 25,
 139          .isapnp_id = 0x1900,
 140          .name = "at-mio-16e-2",
 141          .n_adchan = 16,
 142          .adbits = 12,
 143          .ai_fifo_depth = 2048,
 144          .alwaysdither = 0,
 145          .gainlkup = ai_gain_16,
 146          .ai_speed = 2000,
 147          .n_aochan = 2,
 148          .aobits = 12,
 149          .ao_fifo_depth = 2048,
 150          .ao_range_table = &range_ni_E_ao_ext,
 151          .ao_unipolar = 1,
 152          .ao_speed = 1000,
 153          .has_8255 = 0,
 154          .num_p0_dio_channels = 8,
 155          .caldac = {mb88341},
 156          },
 157         {.device_id = 36,
 158          .isapnp_id = 0x2400,
 159          .name = "at-mio-16e-10",
 160          .n_adchan = 16,
 161          .adbits = 12,
 162          .ai_fifo_depth = 512,
 163          .alwaysdither = 0,
 164          .gainlkup = ai_gain_16,
 165          .ai_speed = 10000,
 166          .n_aochan = 2,
 167          .aobits = 12,
 168          .ao_fifo_depth = 0,
 169          .ao_range_table = &range_ni_E_ao_ext,
 170          .ao_unipolar = 1,
 171          .ao_speed = 10000,
 172          .num_p0_dio_channels = 8,
 173          .caldac = {ad8804_debug},
 174          .has_8255 = 0,
 175          },
 176         {.device_id = 37,
 177          .isapnp_id = 0x2500,
 178          .name = "at-mio-16de-10",
 179          .n_adchan = 16,
 180          .adbits = 12,
 181          .ai_fifo_depth = 512,
 182          .alwaysdither = 0,
 183          .gainlkup = ai_gain_16,
 184          .ai_speed = 10000,
 185          .n_aochan = 2,
 186          .aobits = 12,
 187          .ao_fifo_depth = 0,
 188          .ao_range_table = &range_ni_E_ao_ext,
 189          .ao_unipolar = 1,
 190          .ao_speed = 10000,
 191          .num_p0_dio_channels = 8,
 192          .caldac = {ad8804_debug},
 193          .has_8255 = 1,
 194          },
 195         {.device_id = 38,
 196          .isapnp_id = 0x2600,
 197          .name = "at-mio-64e-3",
 198          .n_adchan = 64,
 199          .adbits = 12,
 200          .ai_fifo_depth = 2048,
 201          .alwaysdither = 0,
 202          .gainlkup = ai_gain_16,
 203          .ai_speed = 2000,
 204          .n_aochan = 2,
 205          .aobits = 12,
 206          .ao_fifo_depth = 2048,
 207          .ao_range_table = &range_ni_E_ao_ext,
 208          .ao_unipolar = 1,
 209          .ao_speed = 1000,
 210          .has_8255 = 0,
 211          .num_p0_dio_channels = 8,
 212          .caldac = {ad8804_debug},
 213          },
 214         {.device_id = 39,
 215          .isapnp_id = 0x2700,
 216          .name = "at-mio-16xe-50",
 217          .n_adchan = 16,
 218          .adbits = 16,
 219          .ai_fifo_depth = 512,
 220          .alwaysdither = 1,
 221          .gainlkup = ai_gain_8,
 222          .ai_speed = 50000,
 223          .n_aochan = 2,
 224          .aobits = 12,
 225          .ao_fifo_depth = 0,
 226          .ao_range_table = &range_bipolar10,
 227          .ao_unipolar = 0,
 228          .ao_speed = 50000,
 229          .num_p0_dio_channels = 8,
 230          .caldac = {dac8800, dac8043},
 231          .has_8255 = 0,
 232          },
 233         {.device_id = 50,
 234          .isapnp_id = 0x0000,   /* XXX unknown */
 235          .name = "at-mio-16xe-10",
 236          .n_adchan = 16,
 237          .adbits = 16,
 238          .ai_fifo_depth = 512,
 239          .alwaysdither = 1,
 240          .gainlkup = ai_gain_14,
 241          .ai_speed = 10000,
 242          .n_aochan = 2,
 243          .aobits = 16,
 244          .ao_fifo_depth = 2048,
 245          .ao_range_table = &range_ni_E_ao_ext,
 246          .ao_unipolar = 1,
 247          .ao_speed = 1000,
 248          .num_p0_dio_channels = 8,
 249          .caldac = {dac8800, dac8043, ad8522},
 250          .has_8255 = 0,
 251          },
 252         {.device_id = 51,
 253          .isapnp_id = 0x0000,   /* XXX unknown */
 254          .name = "at-ai-16xe-10",
 255          .n_adchan = 16,
 256          .adbits = 16,
 257          .ai_fifo_depth = 512,
 258          .alwaysdither = 1,     /* unknown */
 259          .gainlkup = ai_gain_14,
 260          .ai_speed = 10000,
 261          .n_aochan = 0,
 262          .aobits = 0,
 263          .ao_fifo_depth = 0,
 264          .ao_unipolar = 0,
 265          .num_p0_dio_channels = 8,
 266          .caldac = {dac8800, dac8043, ad8522},
 267          .has_8255 = 0,
 268          }
 269 };
 270
 271 static const int ni_irqpin[] = {
 272         -1, -1, -1, 0, 1, 2, -1, 3, -1, -1, 4, 5, 6, -1, -1, 7
 273 };
 274
 275 #define interrupt_pin(a)        (ni_irqpin[(a)])
 276
 277 #define IRQ_POLARITY 0
 278
 279 #define NI_E_IRQ_FLAGS          0
 280
 281 struct ni_private {
 282         struct pnp_dev *isapnp_dev;
 283         NI_PRIVATE_COMMON
 284
 285 };
 286
 287 /* How we access registers */
 288
 289 #define ni_writel(a, b)         (outl((a), (b)+dev->iobase))
 290 #define ni_readl(a)             (inl((a)+dev->iobase))
 291 #define ni_writew(a, b)         (outw((a), (b)+dev->iobase))
 292 #define ni_readw(a)             (inw((a)+dev->iobase))
 293 #define ni_writeb(a, b)         (outb((a), (b)+dev->iobase))
 294 #define ni_readb(a)             (inb((a)+dev->iobase))
 295
 296 /* How we access windowed registers */
 297
 298 /* We automatically take advantage of STC registers that can be
 299  * read/written directly in the I/O space of the board.  The
 300  * AT-MIO devices map the low 8 STC registers to iobase+addr*2. */
 301
 302 static void ni_atmio_win_out(struct comedi_device *dev, uint16_t data, int addr)
 303 {
 304         struct ni_private *devpriv = dev->private;
 305         unsigned long flags;
 306
 307         spin_lock_irqsave(&devpriv->window_lock, flags);
 308         if ((addr) < 8) {
 309                 ni_writew(data, addr * 2);
 310         } else {
 311                 ni_writew(addr, Window_Address);
 312                 ni_writew(data, Window_Data);
 313         }
 314         spin_unlock_irqrestore(&devpriv->window_lock, flags);
 315 }
 316
 317 static uint16_t ni_atmio_win_in(struct comedi_device *dev, int addr)
 318 {
 319         struct ni_private *devpriv = dev->private;
 320         unsigned long flags;
 321         uint16_t ret;
 322
 323         spin_lock_irqsave(&devpriv->window_lock, flags);
 324         if (addr < 8) {
 325                 ret = ni_readw(addr * 2);
 326         } else {
 327                 ni_writew(addr, Window_Address);
 328                 ret = ni_readw(Window_Data);
 329         }
 330         spin_unlock_irqrestore(&devpriv->window_lock, flags);
 331
 332         return ret;
 333 }
 334
 335 static struct pnp_device_id device_ids[] = {
 336         {.id = "NIC1900", .driver_data = 0},
 337         {.id = "NIC2400", .driver_data = 0},
 338         {.id = "NIC2500", .driver_data = 0},
 339         {.id = "NIC2600", .driver_data = 0},
 340         {.id = "NIC2700", .driver_data = 0},
 341         {.id = ""}
 342 };
 343
 344 MODULE_DEVICE_TABLE(pnp, device_ids);
 345
 346 #include "ni_mio_common.c"
 347
 348 static int ni_isapnp_find_board(struct pnp_dev **dev)
 349 {
 350         struct pnp_dev *isapnp_dev = NULL;
 351         int i;
 352
 353         for (i = 0; i < ARRAY_SIZE(ni_boards); i++) {
 354                 isapnp_dev = pnp_find_dev(NULL,
 355                                           ISAPNP_VENDOR('N', 'I', 'C'),
 356                                           ISAPNP_FUNCTION(ni_boards[i].
 357                                                           isapnp_id), NULL);
 358
 359                 if (isapnp_dev == NULL || isapnp_dev->card == NULL)
 360                         continue;
 361
 362                 if (pnp_device_attach(isapnp_dev) < 0) {
 363                         printk
 364                          ("ni_atmio: %s found but already active, skipping.\n",
 365                           ni_boards[i].name);
 366                         continue;
 367                 }
 368                 if (pnp_activate_dev(isapnp_dev) < 0) {
 369                         pnp_device_detach(isapnp_dev);
 370                         return -EAGAIN;
 371                 }
 372                 if (!pnp_port_valid(isapnp_dev, 0)
 373                     || !pnp_irq_valid(isapnp_dev, 0)) {
 374                         pnp_device_detach(isapnp_dev);
 375                         printk("ni_atmio: pnp invalid port or irq, aborting\n");
 376                         return -ENOMEM;
 377                 }
 378                 break;
 379         }
 380         if (i == ARRAY_SIZE(ni_boards))
 381                 return -ENODEV;
 382         *dev = isapnp_dev;
 383         return 0;
 384 }
 385
 386 static int ni_getboardtype(struct comedi_device *dev)
 387 {
 388         int device_id = ni_read_eeprom(dev, 511);
 389         int i;
 390
 391         for (i = 0; i < ARRAY_SIZE(ni_boards); i++) {
 392                 if (ni_boards[i].device_id == device_id)
 393                         return i;
 394
 395         }
 396         if (device_id == 255)
 397                 printk(" can't find board\n");
 398          else if (device_id == 0)
 399                 printk(" EEPROM read error (?) or device not found\n");
 400          else
 401                 printk(" unknown device ID %d -- contact author\n", device_id);
 402
 403         return -1;
 404 }
 405
 406 static int ni_atmio_attach(struct comedi_device *dev,
 407                            struct comedi_devconfig *it)
 408 {
 409         const struct ni_board_struct *boardtype;
 410         struct ni_private *devpriv;
 411         struct pnp_dev *isapnp_dev;
 412         int ret;
 413         unsigned long iobase;
 414         int board;
 415         unsigned int irq;
 416
 417         ret = ni_alloc_private(dev);
 418         if (ret)
 419                 return ret;
 420         devpriv = dev->private;
 421
 422         devpriv->stc_writew = &ni_atmio_win_out;
 423         devpriv->stc_readw = &ni_atmio_win_in;
 424         devpriv->stc_writel = &win_out2;
 425         devpriv->stc_readl = &win_in2;
 426
 427         iobase = it->options[0];
 428         irq = it->options[1];
 429         isapnp_dev = NULL;
 430         if (iobase == 0) {
 431                 ret = ni_isapnp_find_board(&isapnp_dev);
 432                 if (ret < 0)
 433                         return ret;
 434
 435                 iobase = pnp_port_start(isapnp_dev, 0);
 436                 irq = pnp_irq(isapnp_dev, 0);
 437                 devpriv->isapnp_dev = isapnp_dev;
 438         }
 439
 440         ret = comedi_request_region(dev, iobase, NI_SIZE);
 441         if (ret)
 442                 return ret;
 443
 444 #ifdef DEBUG
 445         /* board existence sanity check */
 446         {
 447                 int i;
 448
 449                 printk(" board fingerprint:");
 450                 for (i = 0; i < 16; i += 2) {
 451                         printk(" %04x %02x", inw(dev->iobase + i),
 452                                inb(dev->iobase + i + 1));
 453                 }
 454         }
 455 #endif
 456
 457         /* get board type */
 458
 459         board = ni_getboardtype(dev);
 460         if (board < 0)
 461                 return -EIO;
 462
 463         dev->board_ptr = ni_boards + board;
 464         boardtype = comedi_board(dev);
 465
 466         printk(" %s", boardtype->name);
 467         dev->board_name = boardtype->name;
 468
 469         /* irq stuff */
 470
 471         if (irq != 0) {
 472                 if (irq > 15 || ni_irqpin[irq] == -1) {
 473                         printk(" invalid irq %u\n", irq);
 474                         return -EINVAL;
 475                 }
 476                 printk(" ( irq = %u )", irq);
 477                 ret = request_irq(irq, ni_E_interrupt, NI_E_IRQ_FLAGS,
 478                                   "ni_atmio", dev);
 479
 480                 if (ret < 0) {
 481                         printk(" irq not available\n");
 482                         return -EINVAL;
 483                 }
 484                 dev->irq = irq;
 485         }
 486
 487         /* generic E series stuff in ni_mio_common.c */
 488
 489         ret = ni_E_init(dev);
 490         if (ret < 0)
 491                 return ret;
 492
 493
 494         return 0;
 495 }
 496
 497 static void ni_atmio_detach(struct comedi_device *dev)
 498 {
 499         struct ni_private *devpriv = dev->private;
 500
 501         mio_common_detach(dev);
 502         comedi_legacy_detach(dev);
 503         if (devpriv->isapnp_dev)
 504                 pnp_device_detach(devpriv->isapnp_dev);
 505 }
 506
 507 static struct comedi_driver ni_atmio_driver = {
 508         .driver_name    = "ni_atmio",
 509         .module         = THIS_MODULE,
 510         .attach         = ni_atmio_attach,
 511         .detach         = ni_atmio_detach,
 512 };
 513 module_comedi_driver(ni_atmio_driver);