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   1 /*
   2     comedi/drivers/ni_6527.c
   3     driver for National Instruments PCI-6527
   4
   5     COMEDI - Linux Control and Measurement Device Interface
   6     Copyright (C) 1999,2002,2003 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_6527
  25 Description: National Instruments 6527
  26 Author: ds
  27 Status: works
  28 Devices: [National Instruments] PCI-6527 (ni6527), PXI-6527
  29 Updated: Sat, 25 Jan 2003 13:24:40 -0800
  30
  31
  32 */
  33
  34 /*
  35    Manuals (available from ftp://ftp.natinst.com/support/manuals)
  36
  37         370106b.pdf     6527 Register Level Programmer Manual
  38
  39  */
  40
  41 #define DEBUG 1
  42 #define DEBUG_FLAGS
  43
  44 #include "../comedidev.h"
  45
  46 #include "mite.h"
  47
  48 #define NI6527_DIO_SIZE 4096
  49 #define NI6527_MITE_SIZE 4096
  50
  51 #define Port_Register(x)                        (0x00+(x))
  52 #define ID_Register                             0x06
  53
  54 #define Clear_Register                          0x07
  55 #define ClrEdge                         0x08
  56 #define ClrOverflow                     0x04
  57 #define ClrFilter                       0x02
  58 #define ClrInterval                     0x01
  59
  60 #define Filter_Interval(x)                      (0x08+(x))
  61 #define Filter_Enable(x)                        (0x0c+(x))
  62
  63 #define Change_Status                           0x14
  64 #define MasterInterruptStatus           0x04
  65 #define Overflow                        0x02
  66 #define EdgeStatus                      0x01
  67
  68 #define Master_Interrupt_Control                0x15
  69 #define FallingEdgeIntEnable            0x10
  70 #define RisingEdgeIntEnable             0x08
  71 #define MasterInterruptEnable           0x04
  72 #define OverflowIntEnable               0x02
  73 #define EdgeIntEnable                   0x01
  74
  75 #define Rising_Edge_Detection_Enable(x)         (0x018+(x))
  76 #define Falling_Edge_Detection_Enable(x)        (0x020+(x))
  77
  78 static int ni6527_attach(struct comedi_device * dev, struct comedi_devconfig * it);
  79 static int ni6527_detach(struct comedi_device * dev);
  80 static struct comedi_driver driver_ni6527 = {
  81       driver_name:"ni6527",
  82       module:THIS_MODULE,
  83       attach:ni6527_attach,
  84       detach:ni6527_detach,
  85 };
  86
  87 struct ni6527_board {
  88
  89         int dev_id;
  90         const char *name;
  91 };
  92
  93 static const struct ni6527_board ni6527_boards[] = {
  94         {
  95               dev_id:   0x2b20,
  96               name:     "pci-6527",
  97                 },
  98         {
  99               dev_id:   0x2b10,
 100               name:     "pxi-6527",
 101                 },
 102 };
 103
 104 #define n_ni6527_boards (sizeof(ni6527_boards)/sizeof(ni6527_boards[0]))
 105 #define this_board ((const struct ni6527_board *)dev->board_ptr)
 106
 107 static DEFINE_PCI_DEVICE_TABLE(ni6527_pci_table) = {
 108         {PCI_VENDOR_ID_NATINST, 0x2b10, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 109         {PCI_VENDOR_ID_NATINST, 0x2b20, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
 110         {0}
 111 };
 112
 113 MODULE_DEVICE_TABLE(pci, ni6527_pci_table);
 114
 115 typedef struct {
 116         struct mite_struct *mite;
 117         unsigned int filter_interval;
 118         unsigned int filter_enable;
 119 } ni6527_private;
 120 #define devpriv ((ni6527_private *)dev->private)
 121
 122 static int ni6527_find_device(struct comedi_device * dev, int bus, int slot);
 123
 124 static int ni6527_di_insn_config(struct comedi_device * dev, struct comedi_subdevice * s,
 125         struct comedi_insn * insn, unsigned int * data)
 126 {
 127         int chan = CR_CHAN(insn->chanspec);
 128         unsigned int interval;
 129
 130         if (insn->n != 2)
 131                 return -EINVAL;
 132
 133         if (data[0] != INSN_CONFIG_FILTER)
 134                 return -EINVAL;
 135
 136         if (data[1]) {
 137                 interval = (data[1] + 100) / 200;
 138                 data[1] = interval * 200;
 139
 140                 if (interval != devpriv->filter_interval) {
 141                         writeb(interval & 0xff,
 142                                 devpriv->mite->daq_io_addr +
 143                                 Filter_Interval(0));
 144                         writeb((interval >> 8) & 0xff,
 145                                 devpriv->mite->daq_io_addr +
 146                                 Filter_Interval(1));
 147                         writeb((interval >> 16) & 0x0f,
 148                                 devpriv->mite->daq_io_addr +
 149                                 Filter_Interval(2));
 150
 151                         writeb(ClrInterval,
 152                                 devpriv->mite->daq_io_addr + Clear_Register);
 153
 154                         devpriv->filter_interval = interval;
 155                 }
 156
 157                 devpriv->filter_enable |= 1 << chan;
 158         } else {
 159                 devpriv->filter_enable &= ~(1 << chan);
 160         }
 161
 162         writeb(devpriv->filter_enable,
 163                 devpriv->mite->daq_io_addr + Filter_Enable(0));
 164         writeb(devpriv->filter_enable >> 8,
 165                 devpriv->mite->daq_io_addr + Filter_Enable(1));
 166         writeb(devpriv->filter_enable >> 16,
 167                 devpriv->mite->daq_io_addr + Filter_Enable(2));
 168
 169         return 2;
 170 }
 171
 172 static int ni6527_di_insn_bits(struct comedi_device * dev, struct comedi_subdevice * s,
 173         struct comedi_insn * insn, unsigned int * data)
 174 {
 175         if (insn->n != 2)
 176                 return -EINVAL;
 177
 178         data[1] = readb(devpriv->mite->daq_io_addr + Port_Register(0));
 179         data[1] |= readb(devpriv->mite->daq_io_addr + Port_Register(1)) << 8;
 180         data[1] |= readb(devpriv->mite->daq_io_addr + Port_Register(2)) << 16;
 181
 182         return 2;
 183 }
 184
 185 static int ni6527_do_insn_bits(struct comedi_device * dev, struct comedi_subdevice * s,
 186         struct comedi_insn * insn, unsigned int * data)
 187 {
 188         if (insn->n != 2)
 189                 return -EINVAL;
 190         if (data[0]) {
 191                 s->state &= ~data[0];
 192                 s->state |= (data[0] & data[1]);
 193
 194                 /* The open relay state on the board cooresponds to 1,
 195                  * but in Comedi, it is represented by 0. */
 196                 if (data[0] & 0x0000ff) {
 197                         writeb((s->state ^ 0xff),
 198                                 devpriv->mite->daq_io_addr + Port_Register(3));
 199                 }
 200                 if (data[0] & 0x00ff00) {
 201                         writeb((s->state >> 8) ^ 0xff,
 202                                 devpriv->mite->daq_io_addr + Port_Register(4));
 203                 }
 204                 if (data[0] & 0xff0000) {
 205                         writeb((s->state >> 16) ^ 0xff,
 206                                 devpriv->mite->daq_io_addr + Port_Register(5));
 207                 }
 208         }
 209         data[1] = s->state;
 210
 211         return 2;
 212 }
 213
 214 static irqreturn_t ni6527_interrupt(int irq, void *d PT_REGS_ARG)
 215 {
 216         struct comedi_device *dev = d;
 217         struct comedi_subdevice *s = dev->subdevices + 2;
 218         unsigned int status;
 219
 220         status = readb(devpriv->mite->daq_io_addr + Change_Status);
 221         if ((status & MasterInterruptStatus) == 0)
 222                 return IRQ_NONE;
 223         if ((status & EdgeStatus) == 0)
 224                 return IRQ_NONE;
 225
 226         writeb(ClrEdge | ClrOverflow,
 227                 devpriv->mite->daq_io_addr + Clear_Register);
 228
 229         comedi_buf_put(s->async, 0);
 230         s->async->events |= COMEDI_CB_EOS;
 231         comedi_event(dev, s);
 232         return IRQ_HANDLED;
 233 }
 234
 235 static int ni6527_intr_cmdtest(struct comedi_device * dev, struct comedi_subdevice * s,
 236         struct comedi_cmd * cmd)
 237 {
 238         int err = 0;
 239         int tmp;
 240
 241         /* step 1: make sure trigger sources are trivially valid */
 242
 243         tmp = cmd->start_src;
 244         cmd->start_src &= TRIG_NOW;
 245         if (!cmd->start_src || tmp != cmd->start_src)
 246                 err++;
 247
 248         tmp = cmd->scan_begin_src;
 249         cmd->scan_begin_src &= TRIG_OTHER;
 250         if (!cmd->scan_begin_src || tmp != cmd->scan_begin_src)
 251                 err++;
 252
 253         tmp = cmd->convert_src;
 254         cmd->convert_src &= TRIG_FOLLOW;
 255         if (!cmd->convert_src || tmp != cmd->convert_src)
 256                 err++;
 257
 258         tmp = cmd->scan_end_src;
 259         cmd->scan_end_src &= TRIG_COUNT;
 260         if (!cmd->scan_end_src || tmp != cmd->scan_end_src)
 261                 err++;
 262
 263         tmp = cmd->stop_src;
 264         cmd->stop_src &= TRIG_COUNT;
 265         if (!cmd->stop_src || tmp != cmd->stop_src)
 266                 err++;
 267
 268         if (err)
 269                 return 1;
 270
 271         /* step 2: make sure trigger sources are unique and mutually compatible */
 272
 273         if (err)
 274                 return 2;
 275
 276         /* step 3: make sure arguments are trivially compatible */
 277
 278         if (cmd->start_arg != 0) {
 279                 cmd->start_arg = 0;
 280                 err++;
 281         }
 282         if (cmd->scan_begin_arg != 0) {
 283                 cmd->scan_begin_arg = 0;
 284                 err++;
 285         }
 286         if (cmd->convert_arg != 0) {
 287                 cmd->convert_arg = 0;
 288                 err++;
 289         }
 290
 291         if (cmd->scan_end_arg != 1) {
 292                 cmd->scan_end_arg = 1;
 293                 err++;
 294         }
 295         if (cmd->stop_arg != 0) {
 296                 cmd->stop_arg = 0;
 297                 err++;
 298         }
 299
 300         if (err)
 301                 return 3;
 302
 303         /* step 4: fix up any arguments */
 304
 305         if (err)
 306                 return 4;
 307
 308         return 0;
 309 }
 310
 311 static int ni6527_intr_cmd(struct comedi_device * dev, struct comedi_subdevice * s)
 312 {
 313         //struct comedi_cmd *cmd = &s->async->cmd;
 314
 315         writeb(ClrEdge | ClrOverflow,
 316                 devpriv->mite->daq_io_addr + Clear_Register);
 317         writeb(FallingEdgeIntEnable | RisingEdgeIntEnable |
 318                 MasterInterruptEnable | EdgeIntEnable,
 319                 devpriv->mite->daq_io_addr + Master_Interrupt_Control);
 320
 321         return 0;
 322 }
 323
 324 static int ni6527_intr_cancel(struct comedi_device * dev, struct comedi_subdevice * s)
 325 {
 326         writeb(0x00, devpriv->mite->daq_io_addr + Master_Interrupt_Control);
 327
 328         return 0;
 329 }
 330
 331 static int ni6527_intr_insn_bits(struct comedi_device * dev, struct comedi_subdevice * s,
 332         struct comedi_insn * insn, unsigned int * data)
 333 {
 334         if (insn->n < 1)
 335                 return -EINVAL;
 336
 337         data[1] = 0;
 338         return 2;
 339 }
 340
 341 static int ni6527_intr_insn_config(struct comedi_device * dev, struct comedi_subdevice * s,
 342         struct comedi_insn * insn, unsigned int * data)
 343 {
 344         if (insn->n < 1)
 345                 return -EINVAL;
 346         if (data[0] != INSN_CONFIG_CHANGE_NOTIFY)
 347                 return -EINVAL;
 348
 349         writeb(data[1],
 350                 devpriv->mite->daq_io_addr + Rising_Edge_Detection_Enable(0));
 351         writeb(data[1] >> 8,
 352                 devpriv->mite->daq_io_addr + Rising_Edge_Detection_Enable(1));
 353         writeb(data[1] >> 16,
 354                 devpriv->mite->daq_io_addr + Rising_Edge_Detection_Enable(2));
 355
 356         writeb(data[2],
 357                 devpriv->mite->daq_io_addr + Falling_Edge_Detection_Enable(0));
 358         writeb(data[2] >> 8,
 359                 devpriv->mite->daq_io_addr + Falling_Edge_Detection_Enable(1));
 360         writeb(data[2] >> 16,
 361                 devpriv->mite->daq_io_addr + Falling_Edge_Detection_Enable(2));
 362
 363         return 2;
 364 }
 365
 366 static int ni6527_attach(struct comedi_device * dev, struct comedi_devconfig * it)
 367 {
 368         struct comedi_subdevice *s;
 369         int ret;
 370
 371         printk("comedi%d: ni6527:", dev->minor);
 372
 373         if ((ret = alloc_private(dev, sizeof(ni6527_private))) < 0)
 374                 return ret;
 375
 376         ret = ni6527_find_device(dev, it->options[0], it->options[1]);
 377         if (ret < 0)
 378                 return ret;
 379
 380         ret = mite_setup(devpriv->mite);
 381         if (ret < 0) {
 382                 printk("error setting up mite\n");
 383                 return ret;
 384         }
 385
 386         dev->board_name = this_board->name;
 387         printk(" %s", dev->board_name);
 388
 389         printk(" ID=0x%02x", readb(devpriv->mite->daq_io_addr + ID_Register));
 390
 391         if ((ret = alloc_subdevices(dev, 3)) < 0)
 392                 return ret;
 393
 394         s = dev->subdevices + 0;
 395         s->type = COMEDI_SUBD_DI;
 396         s->subdev_flags = SDF_READABLE;
 397         s->n_chan = 24;
 398         s->range_table = &range_digital;
 399         s->maxdata = 1;
 400         s->insn_config = ni6527_di_insn_config;
 401         s->insn_bits = ni6527_di_insn_bits;
 402
 403         s = dev->subdevices + 1;
 404         s->type = COMEDI_SUBD_DO;
 405         s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
 406         s->n_chan = 24;
 407         s->range_table = &range_unknown;        /* FIXME: actually conductance */
 408         s->maxdata = 1;
 409         s->insn_bits = ni6527_do_insn_bits;
 410
 411         s = dev->subdevices + 2;
 412         dev->read_subdev = s;
 413         s->type = COMEDI_SUBD_DI;
 414         s->subdev_flags = SDF_READABLE | SDF_CMD_READ;
 415         s->n_chan = 1;
 416         s->range_table = &range_unknown;
 417         s->maxdata = 1;
 418         s->do_cmdtest = ni6527_intr_cmdtest;
 419         s->do_cmd = ni6527_intr_cmd;
 420         s->cancel = ni6527_intr_cancel;
 421         s->insn_bits = ni6527_intr_insn_bits;
 422         s->insn_config = ni6527_intr_insn_config;
 423
 424         writeb(0x00, devpriv->mite->daq_io_addr + Filter_Enable(0));
 425         writeb(0x00, devpriv->mite->daq_io_addr + Filter_Enable(1));
 426         writeb(0x00, devpriv->mite->daq_io_addr + Filter_Enable(2));
 427
 428         writeb(ClrEdge | ClrOverflow | ClrFilter | ClrInterval,
 429                 devpriv->mite->daq_io_addr + Clear_Register);
 430         writeb(0x00, devpriv->mite->daq_io_addr + Master_Interrupt_Control);
 431
 432         ret = comedi_request_irq(mite_irq(devpriv->mite), ni6527_interrupt,
 433                 IRQF_SHARED, "ni6527", dev);
 434         if (ret < 0) {
 435                 printk(" irq not available");
 436         } else
 437                 dev->irq = mite_irq(devpriv->mite);
 438
 439         printk("\n");
 440
 441         return 0;
 442 }
 443
 444 static int ni6527_detach(struct comedi_device * dev)
 445 {
 446         if (devpriv && devpriv->mite && devpriv->mite->daq_io_addr) {
 447                 writeb(0x00,
 448                         devpriv->mite->daq_io_addr + Master_Interrupt_Control);
 449         }
 450
 451         if (dev->irq) {
 452                 comedi_free_irq(dev->irq, dev);
 453         }
 454
 455         if (devpriv && devpriv->mite) {
 456                 mite_unsetup(devpriv->mite);
 457         }
 458
 459         return 0;
 460 }
 461
 462 static int ni6527_find_device(struct comedi_device * dev, int bus, int slot)
 463 {
 464         struct mite_struct *mite;
 465         int i;
 466
 467         for (mite = mite_devices; mite; mite = mite->next) {
 468                 if (mite->used)
 469                         continue;
 470                 if (bus || slot) {
 471                         if (bus != mite->pcidev->bus->number ||
 472                                 slot != PCI_SLOT(mite->pcidev->devfn))
 473                                 continue;
 474                 }
 475                 for (i = 0; i < n_ni6527_boards; i++) {
 476                         if (mite_device_id(mite) == ni6527_boards[i].dev_id) {
 477                                 dev->board_ptr = ni6527_boards + i;
 478                                 devpriv->mite = mite;
 479                                 return 0;
 480                         }
 481                 }
 482         }
 483         printk("no device found\n");
 484         mite_list_devices();
 485         return -EIO;
 486 }
 487
 488 COMEDI_PCI_INITCLEANUP(driver_ni6527, ni6527_pci_table);