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 #define devpriv ((struct ni_private *)dev->private)
 288
 289 /* How we access registers */
 290
 291 #define ni_writel(a, b)         (outl((a), (b)+dev->iobase))
 292 #define ni_readl(a)             (inl((a)+dev->iobase))
 293 #define ni_writew(a, b)         (outw((a), (b)+dev->iobase))
 294 #define ni_readw(a)             (inw((a)+dev->iobase))
 295 #define ni_writeb(a, b)         (outb((a), (b)+dev->iobase))
 296 #define ni_readb(a)             (inb((a)+dev->iobase))
 297
 298 /* How we access windowed registers */
 299
 300 /* We automatically take advantage of STC registers that can be
 301  * read/written directly in the I/O space of the board.  The
 302  * AT-MIO devices map the low 8 STC registers to iobase+addr*2. */
 303
 304 static void ni_atmio_win_out(struct comedi_device *dev, uint16_t data, int addr)
 305 {
 306         unsigned long flags;
 307
 308         spin_lock_irqsave(&devpriv->window_lock, flags);
 309         if ((addr) < 8) {
 310                 ni_writew(data, addr * 2);
 311         } else {
 312                 ni_writew(addr, Window_Address);
 313                 ni_writew(data, Window_Data);
 314         }
 315         spin_unlock_irqrestore(&devpriv->window_lock, flags);
 316 }
 317
 318 static uint16_t ni_atmio_win_in(struct comedi_device *dev, int addr)
 319 {
 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 < n_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 == n_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 < n_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         struct pnp_dev *isapnp_dev;
 410         int ret;
 411         unsigned long iobase;
 412         int board;
 413         unsigned int irq;
 414
 415         /* allocate private area */
 416         ret = ni_alloc_private(dev);
 417         if (ret < 0)
 418                 return ret;
 419
 420         devpriv->stc_writew = &ni_atmio_win_out;
 421         devpriv->stc_readw = &ni_atmio_win_in;
 422         devpriv->stc_writel = &win_out2;
 423         devpriv->stc_readl = &win_in2;
 424
 425         iobase = it->options[0];
 426         irq = it->options[1];
 427         isapnp_dev = NULL;
 428         if (iobase == 0) {
 429                 ret = ni_isapnp_find_board(&isapnp_dev);
 430                 if (ret < 0)
 431                         return ret;
 432
 433                 iobase = pnp_port_start(isapnp_dev, 0);
 434                 irq = pnp_irq(isapnp_dev, 0);
 435                 devpriv->isapnp_dev = isapnp_dev;
 436         }
 437
 438         /* reserve our I/O region */
 439
 440         printk("comedi%d: ni_atmio: 0x%04lx", dev->minor, iobase);
 441         if (!request_region(iobase, NI_SIZE, "ni_atmio")) {
 442                 printk(" I/O port conflict\n");
 443                 return -EIO;
 444         }
 445
 446         dev->iobase = iobase;
 447
 448 #ifdef DEBUG
 449         /* board existence sanity check */
 450         {
 451                 int i;
 452
 453                 printk(" board fingerprint:");
 454                 for (i = 0; i < 16; i += 2) {
 455                         printk(" %04x %02x", inw(dev->iobase + i),
 456                                inb(dev->iobase + i + 1));
 457                 }
 458         }
 459 #endif
 460
 461         /* get board type */
 462
 463         board = ni_getboardtype(dev);
 464         if (board < 0)
 465                 return -EIO;
 466
 467         dev->board_ptr = ni_boards + board;
 468
 469         printk(" %s", boardtype.name);
 470         dev->board_name = boardtype.name;
 471
 472         /* irq stuff */
 473
 474         if (irq != 0) {
 475                 if (irq > 15 || ni_irqpin[irq] == -1) {
 476                         printk(" invalid irq %u\n", irq);
 477                         return -EINVAL;
 478                 }
 479                 printk(" ( irq = %u )", irq);
 480                 ret = request_irq(irq, ni_E_interrupt, NI_E_IRQ_FLAGS,
 481                                   "ni_atmio", dev);
 482
 483                 if (ret < 0) {
 484                         printk(" irq not available\n");
 485                         return -EINVAL;
 486                 }
 487                 dev->irq = irq;
 488         }
 489
 490         /* generic E series stuff in ni_mio_common.c */
 491
 492         ret = ni_E_init(dev, it);
 493         if (ret < 0)
 494                 return ret;
 495
 496
 497         return 0;
 498 }
 499
 500 static void ni_atmio_detach(struct comedi_device *dev)
 501 {
 502         mio_common_detach(dev);
 503         if (dev->iobase)
 504                 release_region(dev->iobase, NI_SIZE);
 505         if (dev->irq)
 506                 free_irq(dev->irq, dev);
 507         if (devpriv->isapnp_dev)
 508                 pnp_device_detach(devpriv->isapnp_dev);
 509 }
 510
 511 static struct comedi_driver ni_atmio_driver = {
 512         .driver_name    = "ni_atmio",
 513         .module         = THIS_MODULE,
 514         .attach         = ni_atmio_attach,
 515         .detach         = ni_atmio_detach,
 516 };
 517 module_comedi_driver(ni_atmio_driver);