drivers/staging/comedi/drivers/adl_pci6208.c

   1 /*
   2     comedi/drivers/adl_pci6208.c
   3
   4     Hardware driver for ADLink 6208 series cards:
   5         card         | voltage output    | current output
   6         -------------+-------------------+---------------
   7         PCI-6208V    |  8 channels       | -
   8         PCI-6216V    | 16 channels       | -
   9         PCI-6208A    |  8 channels       | 8 channels
  10
  11     COMEDI - Linux Control and Measurement Device Interface
  12     Copyright (C) 2000 David A. Schleef <ds@schleef.org>
  13
  14     This program is free software; you can redistribute it and/or modify
  15     it under the terms of the GNU General Public License as published by
  16     the Free Software Foundation; either version 2 of the License, or
  17     (at your option) any later version.
  18
  19     This program is distributed in the hope that it will be useful,
  20     but WITHOUT ANY WARRANTY; without even the implied warranty of
  21     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22     GNU General Public License for more details.
  23
  24     You should have received a copy of the GNU General Public License
  25     along with this program; if not, write to the Free Software
  26     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27 */
  28 /*
  29 Driver: adl_pci6208
  30 Description: ADLink PCI-6208/6216 Series Multi-channel Analog Output Cards
  31 Devices: (ADLink) PCI-6208 [adl_pci6208]
  32          (ADLink) PCI-6216 [adl_pci6216]
  33 Author: nsyeow <nsyeow@pd.jaring.my>
  34 Updated: Fri, 30 Jan 2004 14:44:27 +0800
  35 Status: untested
  36
  37 Configuration Options: not applicable, uses PCI auto config
  38
  39 References:
  40         - ni_660x.c
  41         - adl_pci9111.c         copied the entire pci setup section
  42         - adl_pci9118.c
  43 */
  44
  45 #include <linux/pci.h>
  46
  47 #include "../comedidev.h"
  48
  49 /*
  50  * ADLINK PCI Device ID's supported by this driver
  51  */
  52 #define PCI_DEVICE_ID_PCI6208           0x6208
  53 #define PCI_DEVICE_ID_PCI6216           0x6216
  54
  55 /*
  56  * PCI-6208/6216-GL register map
  57  */
  58 #define PCI6208_AO_CONTROL(x)           (0x00 + (2 * (x)))
  59 #define PCI6208_AO_STATUS               0x00
  60 #define PCI6208_AO_STATUS_DATA_SEND     (1 << 0)
  61 #define PCI6208_DIO                     0x40
  62 #define PCI6208_DIO_DO_MASK             (0x0f)
  63 #define PCI6208_DIO_DO_SHIFT            (0)
  64 #define PCI6208_DIO_DI_MASK             (0xf0)
  65 #define PCI6208_DIO_DI_SHIFT            (4)
  66
  67 #define PCI6208_MAX_AO_CHANNELS         16
  68
  69 struct pci6208_board {
  70         const char *name;
  71         unsigned short dev_id;
  72         int ao_chans;
  73 };
  74
  75 static const struct pci6208_board pci6208_boards[] = {
  76         {
  77                 .name           = "adl_pci6208",
  78                 .dev_id         = PCI_DEVICE_ID_PCI6208,
  79                 .ao_chans       = 8,
  80         }, {
  81                 .name           = "adl_pci6216",
  82                 .dev_id         = PCI_DEVICE_ID_PCI6216,
  83                 .ao_chans       = 16,
  84         },
  85 };
  86
  87 struct pci6208_private {
  88         unsigned int ao_readback[PCI6208_MAX_AO_CHANNELS];
  89 };
  90
  91 static int pci6208_ao_winsn(struct comedi_device *dev,
  92                             struct comedi_subdevice *s,
  93                             struct comedi_insn *insn, unsigned int *data)
  94 {
  95         struct pci6208_private *devpriv = dev->private;
  96         int chan = CR_CHAN(insn->chanspec);
  97         unsigned long invert = 1 << (16 - 1);
  98         unsigned long value = 0;
  99         unsigned short status;
 100         int i;
 101
 102         for (i = 0; i < insn->n; i++) {
 103                 value = data[i] ^ invert;
 104
 105                 do {
 106                         status = inw(dev->iobase + PCI6208_AO_STATUS);
 107                 } while (status & PCI6208_AO_STATUS_DATA_SEND);
 108
 109                 outw(value, dev->iobase + PCI6208_AO_CONTROL(chan));
 110         }
 111         devpriv->ao_readback[chan] = value;
 112
 113         return insn->n;
 114 }
 115
 116 static int pci6208_ao_rinsn(struct comedi_device *dev,
 117                             struct comedi_subdevice *s,
 118                             struct comedi_insn *insn, unsigned int *data)
 119 {
 120         struct pci6208_private *devpriv = dev->private;
 121         int chan = CR_CHAN(insn->chanspec);
 122         int i;
 123
 124         for (i = 0; i < insn->n; i++)
 125                 data[i] = devpriv->ao_readback[chan];
 126
 127         return insn->n;
 128 }
 129
 130 static int pci6208_di_insn_bits(struct comedi_device *dev,
 131                                 struct comedi_subdevice *s,
 132                                 struct comedi_insn *insn,
 133                                 unsigned int *data)
 134 {
 135         unsigned int val;
 136
 137         val = inw(dev->iobase + PCI6208_DIO);
 138         val = (val & PCI6208_DIO_DI_MASK) >> PCI6208_DIO_DI_SHIFT;
 139
 140         data[1] = val;
 141
 142         return insn->n;
 143 }
 144
 145 static int pci6208_do_insn_bits(struct comedi_device *dev,
 146                                 struct comedi_subdevice *s,
 147                                 struct comedi_insn *insn,
 148                                 unsigned int *data)
 149 {
 150         unsigned int mask = data[0];
 151         unsigned int bits = data[1];
 152
 153         if (mask) {
 154                 s->state &= ~mask;
 155                 s->state |= (bits & mask);
 156
 157                 outw(s->state, dev->iobase + PCI6208_DIO);
 158         }
 159
 160         data[1] = s->state;
 161
 162         return insn->n;
 163 }
 164
 165 static const void *pci6208_find_boardinfo(struct comedi_device *dev,
 166                                           struct pci_dev *pcidev)
 167 {
 168         const struct pci6208_board *boardinfo;
 169         int i;
 170
 171         for (i = 0; i < ARRAY_SIZE(pci6208_boards); i++) {
 172                 boardinfo = &pci6208_boards[i];
 173                 if (boardinfo->dev_id == pcidev->device)
 174                         return boardinfo;
 175         }
 176         return NULL;
 177 }
 178
 179 static int pci6208_auto_attach(struct comedi_device *dev,
 180                                          unsigned long context_unused)
 181 {
 182         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 183         const struct pci6208_board *boardinfo;
 184         struct pci6208_private *devpriv;
 185         struct comedi_subdevice *s;
 186         unsigned int val;
 187         int ret;
 188
 189         boardinfo = pci6208_find_boardinfo(dev, pcidev);
 190         if (!boardinfo)
 191                 return -ENODEV;
 192         dev->board_ptr = boardinfo;
 193         dev->board_name = boardinfo->name;
 194
 195         devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL);
 196         if (!devpriv)
 197                 return -ENOMEM;
 198         dev->private = devpriv;
 199
 200         ret = comedi_pci_enable(pcidev, dev->board_name);
 201         if (ret)
 202                 return ret;
 203         dev->iobase = pci_resource_start(pcidev, 2);
 204
 205         ret = comedi_alloc_subdevices(dev, 3);
 206         if (ret)
 207                 return ret;
 208
 209         s = &dev->subdevices[0];
 210         /* analog output subdevice */
 211         s->type         = COMEDI_SUBD_AO;
 212         s->subdev_flags = SDF_WRITABLE;
 213         s->n_chan       = boardinfo->ao_chans;
 214         s->maxdata      = 0xffff;
 215         s->range_table  = &range_bipolar10;
 216         s->insn_write   = pci6208_ao_winsn;
 217         s->insn_read    = pci6208_ao_rinsn;
 218
 219         s = &dev->subdevices[1];
 220         /* digital input subdevice */
 221         s->type         = COMEDI_SUBD_DI;
 222         s->subdev_flags = SDF_READABLE;
 223         s->n_chan       = 4;
 224         s->maxdata      = 1;
 225         s->range_table  = &range_digital;
 226         s->insn_bits    = pci6208_di_insn_bits;
 227
 228         s = &dev->subdevices[2];
 229         /* digital output subdevice */
 230         s->type         = COMEDI_SUBD_DO;
 231         s->subdev_flags = SDF_WRITABLE;
 232         s->n_chan       = 4;
 233         s->maxdata      = 1;
 234         s->range_table  = &range_digital;
 235         s->insn_bits    = pci6208_do_insn_bits;
 236
 237         /*
 238          * Get the read back signals from the digital outputs
 239          * and save it as the initial state for the subdevice.
 240          */
 241         val = inw(dev->iobase + PCI6208_DIO);
 242         val = (val & PCI6208_DIO_DO_MASK) >> PCI6208_DIO_DO_SHIFT;
 243         s->state        = val;
 244         s->io_bits      = 0x0f;
 245
 246         dev_info(dev->class_dev, "%s: %s, I/O base=0x%04lx\n",
 247                 dev->driver->driver_name, dev->board_name, dev->iobase);
 248
 249         return 0;
 250 }
 251
 252 static void pci6208_detach(struct comedi_device *dev)
 253 {
 254         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 255
 256         if (pcidev) {
 257                 if (dev->iobase)
 258                         comedi_pci_disable(pcidev);
 259         }
 260 }
 261
 262 static struct comedi_driver adl_pci6208_driver = {
 263         .driver_name    = "adl_pci6208",
 264         .module         = THIS_MODULE,
 265         .auto_attach    = pci6208_auto_attach,
 266         .detach         = pci6208_detach,
 267 };
 268
 269 static int adl_pci6208_pci_probe(struct pci_dev *dev,
 270                                            const struct pci_device_id *ent)
 271 {
 272         return comedi_pci_auto_config(dev, &adl_pci6208_driver);
 273 }
 274
 275 static DEFINE_PCI_DEVICE_TABLE(adl_pci6208_pci_table) = {
 276         { PCI_DEVICE(PCI_VENDOR_ID_ADLINK, PCI_DEVICE_ID_PCI6208) },
 277         { PCI_DEVICE(PCI_VENDOR_ID_ADLINK, PCI_DEVICE_ID_PCI6216) },
 278         { 0 }
 279 };
 280 MODULE_DEVICE_TABLE(pci, adl_pci6208_pci_table);
 281
 282 static struct pci_driver adl_pci6208_pci_driver = {
 283         .name           = "adl_pci6208",
 284         .id_table       = adl_pci6208_pci_table,
 285         .probe          = adl_pci6208_pci_probe,
 286         .remove         = comedi_pci_auto_unconfig,
 287 };
 288 module_comedi_pci_driver(adl_pci6208_driver, adl_pci6208_pci_driver);
 289
 290 MODULE_AUTHOR("Comedi http://www.comedi.org");
 291 MODULE_DESCRIPTION("Comedi low-level driver");
 292 MODULE_LICENSE("GPL");