drivers/staging/comedi/drivers/ni_6527.c

   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 /*
  19 Driver: ni_6527
  20 Description: National Instruments 6527
  21 Author: ds
  22 Status: works
  23 Devices: [National Instruments] PCI-6527 (ni6527), PXI-6527
  24 Updated: Sat, 25 Jan 2003 13:24:40 -0800
  25
  26
  27 */
  28
  29 /*
  30    Manuals (available from ftp://ftp.natinst.com/support/manuals)
  31
  32         370106b.pdf     6527 Register Level Programmer Manual
  33
  34  */
  35
  36 #define DEBUG 1
  37 #define DEBUG_FLAGS
  38
  39 #include <linux/pci.h>
  40 #include <linux/interrupt.h>
  41
  42 #include "../comedidev.h"
  43
  44 #include "comedi_fc.h"
  45 #include "mite.h"
  46
  47 #define DRIVER_NAME "ni_6527"
  48
  49 #define NI6527_DIO_SIZE 4096
  50 #define NI6527_MITE_SIZE 4096
  51
  52 #define Port_Register(x)                        (0x00+(x))
  53 #define ID_Register                             0x06
  54
  55 #define Clear_Register                          0x07
  56 #define ClrEdge                         0x08
  57 #define ClrOverflow                     0x04
  58 #define ClrFilter                       0x02
  59 #define ClrInterval                     0x01
  60
  61 #define Filter_Interval(x)                      (0x08+(x))
  62 #define Filter_Enable(x)                        (0x0c+(x))
  63
  64 #define Change_Status                           0x14
  65 #define MasterInterruptStatus           0x04
  66 #define Overflow                        0x02
  67 #define EdgeStatus                      0x01
  68
  69 #define Master_Interrupt_Control                0x15
  70 #define FallingEdgeIntEnable            0x10
  71 #define RisingEdgeIntEnable             0x08
  72 #define MasterInterruptEnable           0x04
  73 #define OverflowIntEnable               0x02
  74 #define EdgeIntEnable                   0x01
  75
  76 #define Rising_Edge_Detection_Enable(x)         (0x018+(x))
  77 #define Falling_Edge_Detection_Enable(x)        (0x020+(x))
  78
  79 enum ni6527_boardid {
  80         BOARD_PCI6527,
  81         BOARD_PXI6527,
  82 };
  83
  84 struct ni6527_board {
  85         const char *name;
  86 };
  87
  88 static const struct ni6527_board ni6527_boards[] = {
  89         [BOARD_PCI6527] = {
  90                 .name           = "pci-6527",
  91         },
  92         [BOARD_PXI6527] = {
  93                 .name           = "pxi-6527",
  94         },
  95 };
  96
  97 struct ni6527_private {
  98         struct mite_struct *mite;
  99         unsigned int filter_interval;
 100         unsigned int filter_enable;
 101 };
 102
 103 static int ni6527_di_insn_config(struct comedi_device *dev,
 104                                  struct comedi_subdevice *s,
 105                                  struct comedi_insn *insn, unsigned int *data)
 106 {
 107         struct ni6527_private *devpriv = dev->private;
 108         int chan = CR_CHAN(insn->chanspec);
 109         unsigned int interval;
 110
 111         if (insn->n != 2)
 112                 return -EINVAL;
 113
 114         if (data[0] != INSN_CONFIG_FILTER)
 115                 return -EINVAL;
 116
 117         if (data[1]) {
 118                 interval = (data[1] + 100) / 200;
 119                 data[1] = interval * 200;
 120
 121                 if (interval != devpriv->filter_interval) {
 122                         writeb(interval & 0xff,
 123                                devpriv->mite->daq_io_addr + Filter_Interval(0));
 124                         writeb((interval >> 8) & 0xff,
 125                                devpriv->mite->daq_io_addr + Filter_Interval(1));
 126                         writeb((interval >> 16) & 0x0f,
 127                                devpriv->mite->daq_io_addr + Filter_Interval(2));
 128
 129                         writeb(ClrInterval,
 130                                devpriv->mite->daq_io_addr + Clear_Register);
 131
 132                         devpriv->filter_interval = interval;
 133                 }
 134
 135                 devpriv->filter_enable |= 1 << chan;
 136         } else {
 137                 devpriv->filter_enable &= ~(1 << chan);
 138         }
 139
 140         writeb(devpriv->filter_enable,
 141                devpriv->mite->daq_io_addr + Filter_Enable(0));
 142         writeb(devpriv->filter_enable >> 8,
 143                devpriv->mite->daq_io_addr + Filter_Enable(1));
 144         writeb(devpriv->filter_enable >> 16,
 145                devpriv->mite->daq_io_addr + Filter_Enable(2));
 146
 147         return 2;
 148 }
 149
 150 static int ni6527_di_insn_bits(struct comedi_device *dev,
 151                                struct comedi_subdevice *s,
 152                                struct comedi_insn *insn, unsigned int *data)
 153 {
 154         struct ni6527_private *devpriv = dev->private;
 155
 156         data[1] = readb(devpriv->mite->daq_io_addr + Port_Register(0));
 157         data[1] |= readb(devpriv->mite->daq_io_addr + Port_Register(1)) << 8;
 158         data[1] |= readb(devpriv->mite->daq_io_addr + Port_Register(2)) << 16;
 159
 160         return insn->n;
 161 }
 162
 163 static int ni6527_do_insn_bits(struct comedi_device *dev,
 164                                struct comedi_subdevice *s,
 165                                struct comedi_insn *insn, unsigned int *data)
 166 {
 167         struct ni6527_private *devpriv = dev->private;
 168
 169         if (data[0]) {
 170                 s->state &= ~data[0];
 171                 s->state |= (data[0] & data[1]);
 172
 173                 /* The open relay state on the board cooresponds to 1,
 174                  * but in Comedi, it is represented by 0. */
 175                 if (data[0] & 0x0000ff) {
 176                         writeb((s->state ^ 0xff),
 177                                devpriv->mite->daq_io_addr + Port_Register(3));
 178                 }
 179                 if (data[0] & 0x00ff00) {
 180                         writeb((s->state >> 8) ^ 0xff,
 181                                devpriv->mite->daq_io_addr + Port_Register(4));
 182                 }
 183                 if (data[0] & 0xff0000) {
 184                         writeb((s->state >> 16) ^ 0xff,
 185                                devpriv->mite->daq_io_addr + Port_Register(5));
 186                 }
 187         }
 188         data[1] = s->state;
 189
 190         return insn->n;
 191 }
 192
 193 static irqreturn_t ni6527_interrupt(int irq, void *d)
 194 {
 195         struct comedi_device *dev = d;
 196         struct ni6527_private *devpriv = dev->private;
 197         struct comedi_subdevice *s = &dev->subdevices[2];
 198         unsigned int status;
 199
 200         status = readb(devpriv->mite->daq_io_addr + Change_Status);
 201         if ((status & MasterInterruptStatus) == 0)
 202                 return IRQ_NONE;
 203         if ((status & EdgeStatus) == 0)
 204                 return IRQ_NONE;
 205
 206         writeb(ClrEdge | ClrOverflow,
 207                devpriv->mite->daq_io_addr + Clear_Register);
 208
 209         comedi_buf_put(s->async, 0);
 210         s->async->events |= COMEDI_CB_EOS;
 211         comedi_event(dev, s);
 212         return IRQ_HANDLED;
 213 }
 214
 215 static int ni6527_intr_cmdtest(struct comedi_device *dev,
 216                                struct comedi_subdevice *s,
 217                                struct comedi_cmd *cmd)
 218 {
 219         int err = 0;
 220
 221         /* Step 1 : check if triggers are trivially valid */
 222
 223         err |= cfc_check_trigger_src(&cmd->start_src, TRIG_NOW);
 224         err |= cfc_check_trigger_src(&cmd->scan_begin_src, TRIG_OTHER);
 225         err |= cfc_check_trigger_src(&cmd->convert_src, TRIG_FOLLOW);
 226         err |= cfc_check_trigger_src(&cmd->scan_end_src, TRIG_COUNT);
 227         err |= cfc_check_trigger_src(&cmd->stop_src, TRIG_COUNT);
 228
 229         if (err)
 230                 return 1;
 231
 232         /* Step 2a : make sure trigger sources are unique */
 233         /* Step 2b : and mutually compatible */
 234
 235         if (err)
 236                 return 2;
 237
 238         /* Step 3: check if arguments are trivially valid */
 239
 240         err |= cfc_check_trigger_arg_is(&cmd->start_arg, 0);
 241         err |= cfc_check_trigger_arg_is(&cmd->scan_begin_arg, 0);
 242         err |= cfc_check_trigger_arg_is(&cmd->convert_arg, 0);
 243         err |= cfc_check_trigger_arg_is(&cmd->scan_end_arg, 1);
 244         err |= cfc_check_trigger_arg_is(&cmd->stop_arg, 0);
 245
 246         if (err)
 247                 return 3;
 248
 249         /* step 4: fix up any arguments */
 250
 251         if (err)
 252                 return 4;
 253
 254         return 0;
 255 }
 256
 257 static int ni6527_intr_cmd(struct comedi_device *dev,
 258                            struct comedi_subdevice *s)
 259 {
 260         struct ni6527_private *devpriv = dev->private;
 261         /* struct comedi_cmd *cmd = &s->async->cmd; */
 262
 263         writeb(ClrEdge | ClrOverflow,
 264                devpriv->mite->daq_io_addr + Clear_Register);
 265         writeb(FallingEdgeIntEnable | RisingEdgeIntEnable |
 266                MasterInterruptEnable | EdgeIntEnable,
 267                devpriv->mite->daq_io_addr + Master_Interrupt_Control);
 268
 269         return 0;
 270 }
 271
 272 static int ni6527_intr_cancel(struct comedi_device *dev,
 273                               struct comedi_subdevice *s)
 274 {
 275         struct ni6527_private *devpriv = dev->private;
 276
 277         writeb(0x00, devpriv->mite->daq_io_addr + Master_Interrupt_Control);
 278
 279         return 0;
 280 }
 281
 282 static int ni6527_intr_insn_bits(struct comedi_device *dev,
 283                                  struct comedi_subdevice *s,
 284                                  struct comedi_insn *insn, unsigned int *data)
 285 {
 286         data[1] = 0;
 287         return insn->n;
 288 }
 289
 290 static int ni6527_intr_insn_config(struct comedi_device *dev,
 291                                    struct comedi_subdevice *s,
 292                                    struct comedi_insn *insn, unsigned int *data)
 293 {
 294         struct ni6527_private *devpriv = dev->private;
 295
 296         if (insn->n < 1)
 297                 return -EINVAL;
 298         if (data[0] != INSN_CONFIG_CHANGE_NOTIFY)
 299                 return -EINVAL;
 300
 301         writeb(data[1],
 302                devpriv->mite->daq_io_addr + Rising_Edge_Detection_Enable(0));
 303         writeb(data[1] >> 8,
 304                devpriv->mite->daq_io_addr + Rising_Edge_Detection_Enable(1));
 305         writeb(data[1] >> 16,
 306                devpriv->mite->daq_io_addr + Rising_Edge_Detection_Enable(2));
 307
 308         writeb(data[2],
 309                devpriv->mite->daq_io_addr + Falling_Edge_Detection_Enable(0));
 310         writeb(data[2] >> 8,
 311                devpriv->mite->daq_io_addr + Falling_Edge_Detection_Enable(1));
 312         writeb(data[2] >> 16,
 313                devpriv->mite->daq_io_addr + Falling_Edge_Detection_Enable(2));
 314
 315         return 2;
 316 }
 317
 318 static int ni6527_auto_attach(struct comedi_device *dev,
 319                               unsigned long context)
 320 {
 321         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 322         const struct ni6527_board *board = NULL;
 323         struct ni6527_private *devpriv;
 324         struct comedi_subdevice *s;
 325         int ret;
 326
 327         if (context < ARRAY_SIZE(ni6527_boards))
 328                 board = &ni6527_boards[context];
 329         if (!board)
 330                 return -ENODEV;
 331         dev->board_ptr = board;
 332         dev->board_name = board->name;
 333
 334         ret = comedi_pci_enable(dev);
 335         if (ret)
 336                 return ret;
 337
 338         devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL);
 339         if (!devpriv)
 340                 return -ENOMEM;
 341         dev->private = devpriv;
 342
 343         devpriv->mite = mite_alloc(pcidev);
 344         if (!devpriv->mite)
 345                 return -ENOMEM;
 346
 347         ret = mite_setup(devpriv->mite);
 348         if (ret < 0) {
 349                 dev_err(dev->class_dev, "error setting up mite\n");
 350                 return ret;
 351         }
 352
 353         dev_info(dev->class_dev, "board: %s, ID=0x%02x\n", dev->board_name,
 354                  readb(devpriv->mite->daq_io_addr + ID_Register));
 355
 356         ret = comedi_alloc_subdevices(dev, 3);
 357         if (ret)
 358                 return ret;
 359
 360         s = &dev->subdevices[0];
 361         s->type = COMEDI_SUBD_DI;
 362         s->subdev_flags = SDF_READABLE;
 363         s->n_chan = 24;
 364         s->range_table = &range_digital;
 365         s->maxdata = 1;
 366         s->insn_config = ni6527_di_insn_config;
 367         s->insn_bits = ni6527_di_insn_bits;
 368
 369         s = &dev->subdevices[1];
 370         s->type = COMEDI_SUBD_DO;
 371         s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
 372         s->n_chan = 24;
 373         s->range_table = &range_unknown;  /* FIXME: actually conductance */
 374         s->maxdata = 1;
 375         s->insn_bits = ni6527_do_insn_bits;
 376
 377         s = &dev->subdevices[2];
 378         dev->read_subdev = s;
 379         s->type = COMEDI_SUBD_DI;
 380         s->subdev_flags = SDF_READABLE | SDF_CMD_READ;
 381         s->n_chan = 1;
 382         s->range_table = &range_unknown;
 383         s->maxdata = 1;
 384         s->do_cmdtest = ni6527_intr_cmdtest;
 385         s->do_cmd = ni6527_intr_cmd;
 386         s->cancel = ni6527_intr_cancel;
 387         s->insn_bits = ni6527_intr_insn_bits;
 388         s->insn_config = ni6527_intr_insn_config;
 389
 390         writeb(0x00, devpriv->mite->daq_io_addr + Filter_Enable(0));
 391         writeb(0x00, devpriv->mite->daq_io_addr + Filter_Enable(1));
 392         writeb(0x00, devpriv->mite->daq_io_addr + Filter_Enable(2));
 393
 394         writeb(ClrEdge | ClrOverflow | ClrFilter | ClrInterval,
 395                devpriv->mite->daq_io_addr + Clear_Register);
 396         writeb(0x00, devpriv->mite->daq_io_addr + Master_Interrupt_Control);
 397
 398         ret = request_irq(mite_irq(devpriv->mite), ni6527_interrupt,
 399                           IRQF_SHARED, DRIVER_NAME, dev);
 400         if (ret < 0)
 401                 dev_warn(dev->class_dev, "irq not available\n");
 402         else
 403                 dev->irq = mite_irq(devpriv->mite);
 404
 405         return 0;
 406 }
 407
 408 static void ni6527_detach(struct comedi_device *dev)
 409 {
 410         struct ni6527_private *devpriv = dev->private;
 411
 412         if (devpriv && devpriv->mite && devpriv->mite->daq_io_addr)
 413                 writeb(0x00,
 414                        devpriv->mite->daq_io_addr + Master_Interrupt_Control);
 415         if (dev->irq)
 416                 free_irq(dev->irq, dev);
 417         if (devpriv && devpriv->mite) {
 418                 mite_unsetup(devpriv->mite);
 419                 mite_free(devpriv->mite);
 420         }
 421         comedi_pci_disable(dev);
 422 }
 423
 424 static struct comedi_driver ni6527_driver = {
 425         .driver_name = DRIVER_NAME,
 426         .module = THIS_MODULE,
 427         .auto_attach = ni6527_auto_attach,
 428         .detach = ni6527_detach,
 429 };
 430
 431 static int ni6527_pci_probe(struct pci_dev *dev,
 432                             const struct pci_device_id *id)
 433 {
 434         return comedi_pci_auto_config(dev, &ni6527_driver, id->driver_data);
 435 }
 436
 437 static DEFINE_PCI_DEVICE_TABLE(ni6527_pci_table) = {
 438         { PCI_VDEVICE(NI, 0x2b10), BOARD_PXI6527 },
 439         { PCI_VDEVICE(NI, 0x2b20), BOARD_PCI6527 },
 440         { 0 }
 441 };
 442 MODULE_DEVICE_TABLE(pci, ni6527_pci_table);
 443
 444 static struct pci_driver ni6527_pci_driver = {
 445         .name           = DRIVER_NAME,
 446         .id_table       = ni6527_pci_table,
 447         .probe          = ni6527_pci_probe,
 448         .remove         = comedi_pci_auto_unconfig,
 449 };
 450 module_comedi_pci_driver(ni6527_driver, ni6527_pci_driver);
 451
 452 MODULE_AUTHOR("Comedi http://www.comedi.org");
 453 MODULE_DESCRIPTION("Comedi low-level driver");
 454 MODULE_LICENSE("GPL");