drivers/staging/comedi/drivers/adv_pci1723.c

   1 /*
   2    comedi/drivers/pci1723.c
   3
   4    COMEDI - Linux Control and Measurement Device Interface
   5    Copyright (C) 2000 David A. Schleef <ds@schleef.org>
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16 */
  17 /*
  18 Driver: adv_pci1723
  19 Description: Advantech PCI-1723
  20 Author: yonggang <rsmgnu@gmail.com>, Ian Abbott <abbotti@mev.co.uk>
  21 Devices: [Advantech] PCI-1723 (adv_pci1723)
  22 Updated: Mon, 14 Apr 2008 15:12:56 +0100
  23 Status: works
  24
  25 Configuration Options:
  26   [0] - PCI bus of device (optional)
  27   [1] - PCI slot of device (optional)
  28
  29   If bus/slot is not specified, the first supported
  30   PCI device found will be used.
  31
  32 Subdevice 0 is 8-channel AO, 16-bit, range +/- 10 V.
  33
  34 Subdevice 1 is 16-channel DIO.  The channels are configurable as input or
  35 output in 2 groups (0 to 7, 8 to 15).  Configuring any channel implicitly
  36 configures all channels in the same group.
  37
  38 TODO:
  39
  40 1. Add the two milliamp ranges to the AO subdevice (0 to 20 mA, 4 to 20 mA).
  41 2. Read the initial ranges and values of the AO subdevice at start-up instead
  42    of reinitializing them.
  43 3. Implement calibration.
  44 */
  45
  46 #include <linux/module.h>
  47 #include <linux/pci.h>
  48
  49 #include "../comedidev.h"
  50
  51 /* all the registers for the pci1723 board */
  52 #define PCI1723_DA(N)   ((N)<<1)        /* W: D/A register N (0 to 7) */
  53
  54 #define PCI1723_SYN_SET  0x12           /* synchronized set register */
  55 #define PCI1723_ALL_CHNNELE_SYN_STROBE  0x12
  56                                         /* synchronized status register */
  57
  58 #define PCI1723_RANGE_CALIBRATION_MODE 0x14
  59                                         /* range and calibration mode */
  60 #define PCI1723_RANGE_CALIBRATION_STATUS 0x14
  61                                         /* range and calibration status */
  62
  63 #define PCI1723_CONTROL_CMD_CALIBRATION_FUN 0x16
  64                                                 /*
  65                                                  * SADC control command for
  66                                                  * calibration function
  67                                                  */
  68 #define PCI1723_STATUS_CMD_CALIBRATION_FUN 0x16
  69                                                 /*
  70                                                  * SADC control status for
  71                                                  * calibration function
  72                                                  */
  73
  74 #define PCI1723_CALIBRATION_PARA_STROBE 0x18
  75                                         /* Calibration parameter strobe */
  76
  77 #define PCI1723_DIGITAL_IO_PORT_SET 0x1A        /* Digital I/O port setting */
  78 #define PCI1723_DIGITAL_IO_PORT_MODE 0x1A       /* Digital I/O port mode */
  79
  80 #define PCI1723_WRITE_DIGITAL_OUTPUT_CMD 0x1C
  81                                         /* Write digital output command */
  82 #define PCI1723_READ_DIGITAL_INPUT_DATA 0x1C    /* Read digital input data */
  83
  84 #define PCI1723_WRITE_CAL_CMD 0x1E              /* Write calibration command */
  85 #define PCI1723_READ_CAL_STATUS 0x1E            /* Read calibration status */
  86
  87 #define PCI1723_SYN_STROBE 0x20                 /* Synchronized strobe */
  88
  89 #define PCI1723_RESET_ALL_CHN_STROBE 0x22
  90                                         /* Reset all D/A channels strobe */
  91
  92 #define PCI1723_RESET_CAL_CONTROL_STROBE 0x24
  93                                                 /*
  94                                                  * Reset the calibration
  95                                                  * controller strobe
  96                                                  */
  97
  98 #define PCI1723_CHANGE_CHA_OUTPUT_TYPE_STROBE 0x26
  99                                                 /*
 100                                                  * Change D/A channels output
 101                                                  * type strobe
 102                                                  */
 103
 104 #define PCI1723_SELECT_CALIBRATION 0x28 /* Select the calibration Ref_V */
 105
 106 struct pci1723_private {
 107         unsigned char da_range[8];      /* D/A output range for each channel */
 108         unsigned short ao_data[8];      /* data output buffer */
 109 };
 110
 111 /*
 112  * The pci1723 card reset;
 113  */
 114 static int pci1723_reset(struct comedi_device *dev)
 115 {
 116         struct pci1723_private *devpriv = dev->private;
 117         int i;
 118
 119         outw(0x01, dev->iobase + PCI1723_SYN_SET);
 120                                                /* set synchronous output mode */
 121
 122         for (i = 0; i < 8; i++) {
 123                 /* set all outputs to 0V */
 124                 devpriv->ao_data[i] = 0x8000;
 125                 outw(devpriv->ao_data[i], dev->iobase + PCI1723_DA(i));
 126                 /* set all ranges to +/- 10V */
 127                 devpriv->da_range[i] = 0;
 128                 outw(((devpriv->da_range[i] << 4) | i),
 129                      PCI1723_RANGE_CALIBRATION_MODE);
 130         }
 131
 132         outw(0, dev->iobase + PCI1723_CHANGE_CHA_OUTPUT_TYPE_STROBE);
 133                                                             /* update ranges */
 134         outw(0, dev->iobase + PCI1723_SYN_STROBE);          /* update outputs */
 135
 136         /* set asynchronous output mode */
 137         outw(0, dev->iobase + PCI1723_SYN_SET);
 138
 139         return 0;
 140 }
 141
 142 static int pci1723_insn_read_ao(struct comedi_device *dev,
 143                                 struct comedi_subdevice *s,
 144                                 struct comedi_insn *insn, unsigned int *data)
 145 {
 146         struct pci1723_private *devpriv = dev->private;
 147         int n, chan;
 148
 149         chan = CR_CHAN(insn->chanspec);
 150         for (n = 0; n < insn->n; n++)
 151                 data[n] = devpriv->ao_data[chan];
 152
 153         return n;
 154 }
 155
 156 /*
 157   analog data output;
 158 */
 159 static int pci1723_ao_write_winsn(struct comedi_device *dev,
 160                                   struct comedi_subdevice *s,
 161                                   struct comedi_insn *insn, unsigned int *data)
 162 {
 163         struct pci1723_private *devpriv = dev->private;
 164         unsigned int chan = CR_CHAN(insn->chanspec);
 165         int n;
 166
 167         for (n = 0; n < insn->n; n++) {
 168                 devpriv->ao_data[chan] = data[n];
 169                 outw(data[n], dev->iobase + PCI1723_DA(chan));
 170         }
 171
 172         return n;
 173 }
 174
 175 /*
 176   digital i/o config/query
 177 */
 178 static int pci1723_dio_insn_config(struct comedi_device *dev,
 179                                    struct comedi_subdevice *s,
 180                                    struct comedi_insn *insn, unsigned int *data)
 181 {
 182         unsigned int chan = CR_CHAN(insn->chanspec);
 183         unsigned int mask;
 184         unsigned short mode;
 185         int ret;
 186
 187         if (chan < 8)
 188                 mask = 0x00ff;
 189         else
 190                 mask = 0xff00;
 191
 192         ret = comedi_dio_insn_config(dev, s, insn, data, mask);
 193         if (ret)
 194                 return ret;
 195
 196         /* update hardware DIO mode */
 197         mode = 0x0000;                  /* assume output */
 198         if (!(s->io_bits & 0x00ff))
 199                 mode |= 0x0001;         /* low byte input */
 200         if (!(s->io_bits & 0xff00))
 201                 mode |= 0x0002;         /* high byte input */
 202         outw(mode, dev->iobase + PCI1723_DIGITAL_IO_PORT_SET);
 203
 204         return insn->n;
 205 }
 206
 207 static int pci1723_dio_insn_bits(struct comedi_device *dev,
 208                                  struct comedi_subdevice *s,
 209                                  struct comedi_insn *insn,
 210                                  unsigned int *data)
 211 {
 212         if (comedi_dio_update_state(s, data))
 213                 outw(s->state, dev->iobase + PCI1723_WRITE_DIGITAL_OUTPUT_CMD);
 214
 215         data[1] = inw(dev->iobase + PCI1723_READ_DIGITAL_INPUT_DATA);
 216
 217         return insn->n;
 218 }
 219
 220 static int pci1723_auto_attach(struct comedi_device *dev,
 221                                          unsigned long context_unused)
 222 {
 223         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 224         struct pci1723_private *devpriv;
 225         struct comedi_subdevice *s;
 226         int ret;
 227
 228         devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
 229         if (!devpriv)
 230                 return -ENOMEM;
 231
 232         ret = comedi_pci_enable(dev);
 233         if (ret)
 234                 return ret;
 235         dev->iobase = pci_resource_start(pcidev, 2);
 236
 237         ret = comedi_alloc_subdevices(dev, 2);
 238         if (ret)
 239                 return ret;
 240
 241         s = &dev->subdevices[0];
 242         dev->write_subdev = s;
 243         s->type         = COMEDI_SUBD_AO;
 244         s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_COMMON;
 245         s->n_chan       = 8;
 246         s->maxdata      = 0xffff;
 247         s->len_chanlist = 8;
 248         s->range_table  = &range_bipolar10;
 249         s->insn_write   = pci1723_ao_write_winsn;
 250         s->insn_read    = pci1723_insn_read_ao;
 251
 252         s = &dev->subdevices[1];
 253         s->type         = COMEDI_SUBD_DIO;
 254         s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
 255         s->n_chan       = 16;
 256         s->maxdata      = 1;
 257         s->len_chanlist = 16;
 258         s->range_table  = &range_digital;
 259         s->insn_config  = pci1723_dio_insn_config;
 260         s->insn_bits    = pci1723_dio_insn_bits;
 261
 262         /* read DIO config */
 263         switch (inw(dev->iobase + PCI1723_DIGITAL_IO_PORT_MODE) & 0x03) {
 264         case 0x00:      /* low byte output, high byte output */
 265                 s->io_bits = 0xFFFF;
 266                 break;
 267         case 0x01:      /* low byte input, high byte output */
 268                 s->io_bits = 0xFF00;
 269                 break;
 270         case 0x02:      /* low byte output, high byte input */
 271                 s->io_bits = 0x00FF;
 272                 break;
 273         case 0x03:      /* low byte input, high byte input */
 274                 s->io_bits = 0x0000;
 275                 break;
 276         }
 277         /* read DIO port state */
 278         s->state = inw(dev->iobase + PCI1723_READ_DIGITAL_INPUT_DATA);
 279
 280         pci1723_reset(dev);
 281
 282         return 0;
 283 }
 284
 285 static void pci1723_detach(struct comedi_device *dev)
 286 {
 287         if (dev->iobase)
 288                 pci1723_reset(dev);
 289         comedi_pci_detach(dev);
 290 }
 291
 292 static struct comedi_driver adv_pci1723_driver = {
 293         .driver_name    = "adv_pci1723",
 294         .module         = THIS_MODULE,
 295         .auto_attach    = pci1723_auto_attach,
 296         .detach         = pci1723_detach,
 297 };
 298
 299 static int adv_pci1723_pci_probe(struct pci_dev *dev,
 300                                  const struct pci_device_id *id)
 301 {
 302         return comedi_pci_auto_config(dev, &adv_pci1723_driver,
 303                                       id->driver_data);
 304 }
 305
 306 static const struct pci_device_id adv_pci1723_pci_table[] = {
 307         { PCI_DEVICE(PCI_VENDOR_ID_ADVANTECH, 0x1723) },
 308         { 0 }
 309 };
 310 MODULE_DEVICE_TABLE(pci, adv_pci1723_pci_table);
 311
 312 static struct pci_driver adv_pci1723_pci_driver = {
 313         .name           = "adv_pci1723",
 314         .id_table       = adv_pci1723_pci_table,
 315         .probe          = adv_pci1723_pci_probe,
 316         .remove         = comedi_pci_auto_unconfig,
 317 };
 318 module_comedi_pci_driver(adv_pci1723_driver, adv_pci1723_pci_driver);
 319
 320 MODULE_AUTHOR("Comedi http://www.comedi.org");
 321 MODULE_DESCRIPTION("Comedi low-level driver");
 322 MODULE_LICENSE("GPL");