release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/staging/comedi/drivers/multiq3.c

   1 /*
   2    comedi/drivers/multiq3.c
   3    Hardware driver for Quanser Consulting MultiQ-3 board
   4
   5    COMEDI - Linux Control and Measurement Device Interface
   6    Copyright (C) 1999 Anders Blomdell <anders.blomdell@control.lth.se>
   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: multiq3
  25 Description: Quanser Consulting MultiQ-3
  26 Author: Anders Blomdell <anders.blomdell@control.lth.se>
  27 Status: works
  28 Devices: [Quanser Consulting] MultiQ-3 (multiq3)
  29
  30 */
  31
  32 #include <linux/interrupt.h>
  33 #include "../comedidev.h"
  34
  35 #include <linux/ioport.h>
  36
  37 #define MULTIQ3_SIZE 16
  38
  39 /*
  40  * MULTIQ-3 port offsets
  41  */
  42 #define MULTIQ3_DIGIN_PORT 0
  43 #define MULTIQ3_DIGOUT_PORT 0
  44 #define MULTIQ3_DAC_DATA 2
  45 #define MULTIQ3_AD_DATA 4
  46 #define MULTIQ3_AD_CS 4
  47 #define MULTIQ3_STATUS 6
  48 #define MULTIQ3_CONTROL 6
  49 #define MULTIQ3_CLK_DATA 8
  50 #define MULTIQ3_ENC_DATA 12
  51 #define MULTIQ3_ENC_CONTROL 14
  52
  53 /*
  54  * flags for CONTROL register
  55  */
  56 #define MULTIQ3_AD_MUX_EN      0x0040
  57 #define MULTIQ3_AD_AUTOZ       0x0080
  58 #define MULTIQ3_AD_AUTOCAL     0x0100
  59 #define MULTIQ3_AD_SH          0x0200
  60 #define MULTIQ3_AD_CLOCK_4M    0x0400
  61 #define MULTIQ3_DA_LOAD                0x1800
  62
  63 #define MULTIQ3_CONTROL_MUST    0x0600
  64
  65 /*
  66  * flags for STATUS register
  67  */
  68 #define MULTIQ3_STATUS_EOC      0x008
  69 #define MULTIQ3_STATUS_EOC_I    0x010
  70
  71 /*
  72  * flags for encoder control
  73  */
  74 #define MULTIQ3_CLOCK_DATA      0x00
  75 #define MULTIQ3_CLOCK_SETUP     0x18
  76 #define MULTIQ3_INPUT_SETUP     0x41
  77 #define MULTIQ3_QUAD_X4         0x38
  78 #define MULTIQ3_BP_RESET        0x01
  79 #define MULTIQ3_CNTR_RESET      0x02
  80 #define MULTIQ3_TRSFRPR_CTR     0x08
  81 #define MULTIQ3_TRSFRCNTR_OL    0x10
  82 #define MULTIQ3_EFLAG_RESET     0x06
  83
  84 #define MULTIQ3_TIMEOUT 30
  85
  86 static int multiq3_attach(struct comedi_device *dev,
  87                           struct comedi_devconfig *it);
  88 static int multiq3_detach(struct comedi_device *dev);
  89 static struct comedi_driver driver_multiq3 = {
  90         .driver_name = "multiq3",
  91         .module = THIS_MODULE,
  92         .attach = multiq3_attach,
  93         .detach = multiq3_detach,
  94 };
  95
  96 static int __init driver_multiq3_init_module(void)
  97 {
  98         return comedi_driver_register(&driver_multiq3);
  99 }
 100
 101 static void __exit driver_multiq3_cleanup_module(void)
 102 {
 103         comedi_driver_unregister(&driver_multiq3);
 104 }
 105
 106 module_init(driver_multiq3_init_module);
 107 module_exit(driver_multiq3_cleanup_module);
 108
 109 struct multiq3_private {
 110         unsigned int ao_readback[2];
 111 };
 112 #define devpriv ((struct multiq3_private *)dev->private)
 113
 114 static int multiq3_ai_insn_read(struct comedi_device *dev,
 115                                 struct comedi_subdevice *s,
 116                                 struct comedi_insn *insn, unsigned int *data)
 117 {
 118         int i, n;
 119         int chan;
 120         unsigned int hi, lo;
 121
 122         chan = CR_CHAN(insn->chanspec);
 123         outw(MULTIQ3_CONTROL_MUST | MULTIQ3_AD_MUX_EN | (chan << 3),
 124              dev->iobase + MULTIQ3_CONTROL);
 125
 126         for (i = 0; i < MULTIQ3_TIMEOUT; i++) {
 127                 if (inw(dev->iobase + MULTIQ3_STATUS) & MULTIQ3_STATUS_EOC)
 128                         break;
 129         }
 130         if (i == MULTIQ3_TIMEOUT)
 131                 return -ETIMEDOUT;
 132
 133         for (n = 0; n < insn->n; n++) {
 134                 outw(0, dev->iobase + MULTIQ3_AD_CS);
 135                 for (i = 0; i < MULTIQ3_TIMEOUT; i++) {
 136                         if (inw(dev->iobase +
 137                                 MULTIQ3_STATUS) & MULTIQ3_STATUS_EOC_I)
 138                                 break;
 139                 }
 140                 if (i == MULTIQ3_TIMEOUT)
 141                         return -ETIMEDOUT;
 142
 143                 hi = inb(dev->iobase + MULTIQ3_AD_CS);
 144                 lo = inb(dev->iobase + MULTIQ3_AD_CS);
 145                 data[n] = (((hi << 8) | lo) + 0x1000) & 0x1fff;
 146         }
 147
 148         return n;
 149 }
 150
 151 static int multiq3_ao_insn_read(struct comedi_device *dev,
 152                                 struct comedi_subdevice *s,
 153                                 struct comedi_insn *insn, unsigned int *data)
 154 {
 155         int i;
 156         int chan = CR_CHAN(insn->chanspec);
 157
 158         for (i = 0; i < insn->n; i++)
 159                 data[i] = devpriv->ao_readback[chan];
 160
 161         return i;
 162 }
 163
 164 static int multiq3_ao_insn_write(struct comedi_device *dev,
 165                                  struct comedi_subdevice *s,
 166                                  struct comedi_insn *insn, unsigned int *data)
 167 {
 168         int i;
 169         int chan = CR_CHAN(insn->chanspec);
 170
 171         for (i = 0; i < insn->n; i++) {
 172                 outw(MULTIQ3_CONTROL_MUST | MULTIQ3_DA_LOAD | chan,
 173                      dev->iobase + MULTIQ3_CONTROL);
 174                 outw(data[i], dev->iobase + MULTIQ3_DAC_DATA);
 175                 outw(MULTIQ3_CONTROL_MUST, dev->iobase + MULTIQ3_CONTROL);
 176
 177                 devpriv->ao_readback[chan] = data[i];
 178         }
 179
 180         return i;
 181 }
 182
 183 static int multiq3_di_insn_bits(struct comedi_device *dev,
 184                                 struct comedi_subdevice *s,
 185                                 struct comedi_insn *insn, unsigned int *data)
 186 {
 187         if (insn->n != 2)
 188                 return -EINVAL;
 189
 190         data[1] = inw(dev->iobase + MULTIQ3_DIGIN_PORT);
 191
 192         return 2;
 193 }
 194
 195 static int multiq3_do_insn_bits(struct comedi_device *dev,
 196                                 struct comedi_subdevice *s,
 197                                 struct comedi_insn *insn, unsigned int *data)
 198 {
 199         if (insn->n != 2)
 200                 return -EINVAL;
 201
 202         s->state &= ~data[0];
 203         s->state |= (data[0] & data[1]);
 204         outw(s->state, dev->iobase + MULTIQ3_DIGOUT_PORT);
 205
 206         data[1] = s->state;
 207
 208         return 2;
 209 }
 210
 211 static int multiq3_encoder_insn_read(struct comedi_device *dev,
 212                                      struct comedi_subdevice *s,
 213                                      struct comedi_insn *insn,
 214                                      unsigned int *data)
 215 {
 216         int n;
 217         int chan = CR_CHAN(insn->chanspec);
 218         int control = MULTIQ3_CONTROL_MUST | MULTIQ3_AD_MUX_EN | (chan << 3);
 219
 220         for (n = 0; n < insn->n; n++) {
 221                 int value;
 222                 outw(control, dev->iobase + MULTIQ3_CONTROL);
 223                 outb(MULTIQ3_BP_RESET, dev->iobase + MULTIQ3_ENC_CONTROL);
 224                 outb(MULTIQ3_TRSFRCNTR_OL, dev->iobase + MULTIQ3_ENC_CONTROL);
 225                 value = inb(dev->iobase + MULTIQ3_ENC_DATA);
 226                 value |= (inb(dev->iobase + MULTIQ3_ENC_DATA) << 8);
 227                 value |= (inb(dev->iobase + MULTIQ3_ENC_DATA) << 16);
 228                 data[n] = (value + 0x800000) & 0xffffff;
 229         }
 230
 231         return n;
 232 }
 233
 234 static void encoder_reset(struct comedi_device *dev)
 235 {
 236         int chan;
 237         for (chan = 0; chan < dev->subdevices[4].n_chan; chan++) {
 238                 int control =
 239                     MULTIQ3_CONTROL_MUST | MULTIQ3_AD_MUX_EN | (chan << 3);
 240                 outw(control, dev->iobase + MULTIQ3_CONTROL);
 241                 outb(MULTIQ3_EFLAG_RESET, dev->iobase + MULTIQ3_ENC_CONTROL);
 242                 outb(MULTIQ3_BP_RESET, dev->iobase + MULTIQ3_ENC_CONTROL);
 243                 outb(MULTIQ3_CLOCK_DATA, dev->iobase + MULTIQ3_ENC_DATA);
 244                 outb(MULTIQ3_CLOCK_SETUP, dev->iobase + MULTIQ3_ENC_CONTROL);
 245                 outb(MULTIQ3_INPUT_SETUP, dev->iobase + MULTIQ3_ENC_CONTROL);
 246                 outb(MULTIQ3_QUAD_X4, dev->iobase + MULTIQ3_ENC_CONTROL);
 247                 outb(MULTIQ3_CNTR_RESET, dev->iobase + MULTIQ3_ENC_CONTROL);
 248         }
 249 }
 250
 251 /*
 252    options[0] - I/O port
 253    options[1] - irq
 254    options[2] - number of encoder chips installed
 255  */
 256
 257 static int multiq3_attach(struct comedi_device *dev,
 258                           struct comedi_devconfig *it)
 259 {
 260         int result = 0;
 261         unsigned long iobase;
 262         unsigned int irq;
 263         struct comedi_subdevice *s;
 264
 265         iobase = it->options[0];
 266         printk(KERN_INFO "comedi%d: multiq3: 0x%04lx ", dev->minor, iobase);
 267         if (!request_region(iobase, MULTIQ3_SIZE, "multiq3")) {
 268                 printk(KERN_ERR "comedi%d: I/O port conflict\n", dev->minor);
 269                 return -EIO;
 270         }
 271
 272         dev->iobase = iobase;
 273
 274         irq = it->options[1];
 275         if (irq)
 276                 printk(KERN_WARNING "comedi%d: irq = %u ignored\n",
 277                         dev->minor, irq);
 278         else
 279                 printk(KERN_WARNING "comedi%d: no irq\n", dev->minor);
 280         dev->board_name = "multiq3";
 281         result = alloc_subdevices(dev, 5);
 282         if (result < 0)
 283                 return result;
 284
 285         result = alloc_private(dev, sizeof(struct multiq3_private));
 286         if (result < 0)
 287                 return result;
 288
 289         s = dev->subdevices + 0;
 290         /* ai subdevice */
 291         s->type = COMEDI_SUBD_AI;
 292         s->subdev_flags = SDF_READABLE | SDF_GROUND;
 293         s->n_chan = 8;
 294         s->insn_read = multiq3_ai_insn_read;
 295         s->maxdata = 0x1fff;
 296         s->range_table = &range_bipolar5;
 297
 298         s = dev->subdevices + 1;
 299         /* ao subdevice */
 300         s->type = COMEDI_SUBD_AO;
 301         s->subdev_flags = SDF_WRITABLE;
 302         s->n_chan = 8;
 303         s->insn_read = multiq3_ao_insn_read;
 304         s->insn_write = multiq3_ao_insn_write;
 305         s->maxdata = 0xfff;
 306         s->range_table = &range_bipolar5;
 307
 308         s = dev->subdevices + 2;
 309         /* di subdevice */
 310         s->type = COMEDI_SUBD_DI;
 311         s->subdev_flags = SDF_READABLE;
 312         s->n_chan = 16;
 313         s->insn_bits = multiq3_di_insn_bits;
 314         s->maxdata = 1;
 315         s->range_table = &range_digital;
 316
 317         s = dev->subdevices + 3;
 318         /* do subdevice */
 319         s->type = COMEDI_SUBD_DO;
 320         s->subdev_flags = SDF_WRITABLE;
 321         s->n_chan = 16;
 322         s->insn_bits = multiq3_do_insn_bits;
 323         s->maxdata = 1;
 324         s->range_table = &range_digital;
 325         s->state = 0;
 326
 327         s = dev->subdevices + 4;
 328         /* encoder (counter) subdevice */
 329         s->type = COMEDI_SUBD_COUNTER;
 330         s->subdev_flags = SDF_READABLE | SDF_LSAMPL;
 331         s->n_chan = it->options[2] * 2;
 332         s->insn_read = multiq3_encoder_insn_read;
 333         s->maxdata = 0xffffff;
 334         s->range_table = &range_unknown;
 335
 336         encoder_reset(dev);
 337
 338         return 0;
 339 }
 340
 341 static int multiq3_detach(struct comedi_device *dev)
 342 {
 343         printk(KERN_INFO "comedi%d: multiq3: remove\n", dev->minor);
 344
 345         if (dev->iobase)
 346                 release_region(dev->iobase, MULTIQ3_SIZE);
 347         if (dev->irq)
 348                 free_irq(dev->irq, dev);
 349
 350         return 0;
 351 }
 352
 353 MODULE_AUTHOR("Comedi http://www.comedi.org");
 354 MODULE_DESCRIPTION("Comedi low-level driver");
 355 MODULE_LICENSE("GPL");