release/src-rt-6.x.4708/linux/linux-2.6.36/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,
 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,
 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,
 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 #define interrupt_pin(a)        (ni_irqpin[(a)])
 275
 276 #define IRQ_POLARITY 0
 277
 278 #define NI_E_IRQ_FLAGS          0
 279
 280 struct ni_private {
 281         struct pnp_dev *isapnp_dev;
 282  NI_PRIVATE_COMMON};
 283 #define devpriv ((struct ni_private *)dev->private)
 284
 285 /* How we access registers */
 286
 287 #define ni_writel(a, b)         (outl((a), (b)+dev->iobase))
 288 #define ni_readl(a)             (inl((a)+dev->iobase))
 289 #define ni_writew(a, b)         (outw((a), (b)+dev->iobase))
 290 #define ni_readw(a)             (inw((a)+dev->iobase))
 291 #define ni_writeb(a, b)         (outb((a), (b)+dev->iobase))
 292 #define ni_readb(a)             (inb((a)+dev->iobase))
 293
 294 /* How we access windowed registers */
 295
 296 /* We automatically take advantage of STC registers that can be
 297  * read/written directly in the I/O space of the board.  The
 298  * AT-MIO devices map the low 8 STC registers to iobase+addr*2. */
 299
 300 static void ni_atmio_win_out(struct comedi_device *dev, uint16_t data, int addr)
 301 {
 302         unsigned long flags;
 303
 304         spin_lock_irqsave(&devpriv->window_lock, flags);
 305         if ((addr) < 8) {
 306                 ni_writew(data, addr * 2);
 307         } else {
 308                 ni_writew(addr, Window_Address);
 309                 ni_writew(data, Window_Data);
 310         }
 311         spin_unlock_irqrestore(&devpriv->window_lock, flags);
 312 }
 313
 314 static uint16_t ni_atmio_win_in(struct comedi_device *dev, int addr)
 315 {
 316         unsigned long flags;
 317         uint16_t ret;
 318
 319         spin_lock_irqsave(&devpriv->window_lock, flags);
 320         if (addr < 8) {
 321                 ret = ni_readw(addr * 2);
 322         } else {
 323                 ni_writew(addr, Window_Address);
 324                 ret = ni_readw(Window_Data);
 325         }
 326         spin_unlock_irqrestore(&devpriv->window_lock, flags);
 327
 328         return ret;
 329 }
 330
 331 static struct pnp_device_id device_ids[] = {
 332         {.id = "NIC1900", .driver_data = 0},
 333         {.id = "NIC2400", .driver_data = 0},
 334         {.id = "NIC2500", .driver_data = 0},
 335         {.id = "NIC2600", .driver_data = 0},
 336         {.id = "NIC2700", .driver_data = 0},
 337         {.id = ""}
 338 };
 339
 340 MODULE_DEVICE_TABLE(pnp, device_ids);
 341
 342 static int ni_atmio_attach(struct comedi_device *dev,
 343                            struct comedi_devconfig *it);
 344 static int ni_atmio_detach(struct comedi_device *dev);
 345 static struct comedi_driver driver_atmio = {
 346         .driver_name = "ni_atmio",
 347         .module = THIS_MODULE,
 348         .attach = ni_atmio_attach,
 349         .detach = ni_atmio_detach,
 350 };
 351
 352 static int __init driver_atmio_init_module(void)
 353 {
 354         return comedi_driver_register(&driver_atmio);
 355 }
 356
 357 static void __exit driver_atmio_cleanup_module(void)
 358 {
 359         comedi_driver_unregister(&driver_atmio);
 360 }
 361
 362 module_init(driver_atmio_init_module);
 363 module_exit(driver_atmio_cleanup_module);
 364
 365 #include "ni_mio_common.c"
 366
 367 static int ni_getboardtype(struct comedi_device *dev);
 368
 369 /* clean up allocated resources */
 370 static int ni_atmio_detach(struct comedi_device *dev)
 371 {
 372         mio_common_detach(dev);
 373
 374         if (dev->iobase)
 375                 release_region(dev->iobase, NI_SIZE);
 376         if (dev->irq)
 377                 free_irq(dev->irq, dev);
 378
 379         if (devpriv->isapnp_dev)
 380                 pnp_device_detach(devpriv->isapnp_dev);
 381
 382         return 0;
 383 }
 384
 385 static int ni_isapnp_find_board(struct pnp_dev **dev)
 386 {
 387         struct pnp_dev *isapnp_dev = NULL;
 388         int i;
 389
 390         for (i = 0; i < n_ni_boards; i++) {
 391                 isapnp_dev = pnp_find_dev(NULL,
 392                                           ISAPNP_VENDOR('N', 'I', 'C'),
 393                                           ISAPNP_FUNCTION(ni_boards[i].
 394                                                           isapnp_id), NULL);
 395
 396                 if (isapnp_dev == NULL || isapnp_dev->card == NULL)
 397                         continue;
 398
 399                 if (pnp_device_attach(isapnp_dev) < 0) {
 400                         printk
 401                          ("ni_atmio: %s found but already active, skipping.\n",
 402                           ni_boards[i].name);
 403                         continue;
 404                 }
 405                 if (pnp_activate_dev(isapnp_dev) < 0) {
 406                         pnp_device_detach(isapnp_dev);
 407                         return -EAGAIN;
 408                 }
 409                 if (!pnp_port_valid(isapnp_dev, 0)
 410                     || !pnp_irq_valid(isapnp_dev, 0)) {
 411                         pnp_device_detach(isapnp_dev);
 412                         printk("ni_atmio: pnp invalid port or irq, aborting\n");
 413                         return -ENOMEM;
 414                 }
 415                 break;
 416         }
 417         if (i == n_ni_boards)
 418                 return -ENODEV;
 419         *dev = isapnp_dev;
 420         return 0;
 421 }
 422
 423 static int ni_atmio_attach(struct comedi_device *dev,
 424                            struct comedi_devconfig *it)
 425 {
 426         struct pnp_dev *isapnp_dev;
 427         int ret;
 428         unsigned long iobase;
 429         int board;
 430         unsigned int irq;
 431
 432         /* allocate private area */
 433         ret = ni_alloc_private(dev);
 434         if (ret < 0)
 435                 return ret;
 436
 437         devpriv->stc_writew = &ni_atmio_win_out;
 438         devpriv->stc_readw = &ni_atmio_win_in;
 439         devpriv->stc_writel = &win_out2;
 440         devpriv->stc_readl = &win_in2;
 441
 442         iobase = it->options[0];
 443         irq = it->options[1];
 444         isapnp_dev = NULL;
 445         if (iobase == 0) {
 446                 ret = ni_isapnp_find_board(&isapnp_dev);
 447                 if (ret < 0)
 448                         return ret;
 449
 450                 iobase = pnp_port_start(isapnp_dev, 0);
 451                 irq = pnp_irq(isapnp_dev, 0);
 452                 devpriv->isapnp_dev = isapnp_dev;
 453         }
 454
 455         /* reserve our I/O region */
 456
 457         printk("comedi%d: ni_atmio: 0x%04lx", dev->minor, iobase);
 458         if (!request_region(iobase, NI_SIZE, "ni_atmio")) {
 459                 printk(" I/O port conflict\n");
 460                 return -EIO;
 461         }
 462
 463         dev->iobase = iobase;
 464
 465 #ifdef DEBUG
 466         /* board existence sanity check */
 467         {
 468                 int i;
 469
 470                 printk(" board fingerprint:");
 471                 for (i = 0; i < 16; i += 2) {
 472                         printk(" %04x %02x", inw(dev->iobase + i),
 473                                inb(dev->iobase + i + 1));
 474                 }
 475         }
 476 #endif
 477
 478         /* get board type */
 479
 480         board = ni_getboardtype(dev);
 481         if (board < 0)
 482                 return -EIO;
 483
 484         dev->board_ptr = ni_boards + board;
 485
 486         printk(" %s", boardtype.name);
 487         dev->board_name = boardtype.name;
 488
 489         /* irq stuff */
 490
 491         if (irq != 0) {
 492                 if (irq > 15 || ni_irqpin[irq] == -1) {
 493                         printk(" invalid irq %u\n", irq);
 494                         return -EINVAL;
 495                 }
 496                 printk(" ( irq = %u )", irq);
 497                 ret = request_irq(irq, ni_E_interrupt, NI_E_IRQ_FLAGS,
 498                                   "ni_atmio", dev);
 499
 500                 if (ret < 0) {
 501                         printk(" irq not available\n");
 502                         return -EINVAL;
 503                 }
 504                 dev->irq = irq;
 505         }
 506
 507         /* generic E series stuff in ni_mio_common.c */
 508
 509         ret = ni_E_init(dev, it);
 510         if (ret < 0)
 511                 return ret;
 512
 513
 514         return 0;
 515 }
 516
 517 static int ni_getboardtype(struct comedi_device *dev)
 518 {
 519         int device_id = ni_read_eeprom(dev, 511);
 520         int i;
 521
 522         for (i = 0; i < n_ni_boards; i++) {
 523                 if (ni_boards[i].device_id == device_id)
 524                         return i;
 525
 526         }
 527         if (device_id == 255)
 528                 printk(" can't find board\n");
 529          else if (device_id == 0)
 530                 printk(" EEPROM read error (?) or device not found\n");
 531          else
 532                 printk(" unknown device ID %d -- contact author\n", device_id);
 533
 534         return -1;
 535 }