drivers/staging/comedi/drivers/addi_apci_16xx.c

   1 /*
   2  * addi_apci_16xx.c
   3  * Copyright (C) 2004,2005  ADDI-DATA GmbH for the source code of this module.
   4  * Project manager: S. Weber
   5  *
   6  *      ADDI-DATA GmbH
   7  *      Dieselstrasse 3
   8  *      D-77833 Ottersweier
   9  *      Tel: +19(0)7223/9493-0
  10  *      Fax: +49(0)7223/9493-92
  11  *      http://www.addi-data.com
  12  *      info@addi-data.com
  13  *
  14  * This program is free software; you can redistribute it and/or modify it
  15  * under the terms of the GNU General Public License as published by the
  16  * Free Software Foundation; either version 2 of the License, or (at your
  17  * option) any later version.
  18  *
  19  * This program is distributed in the hope that it will be useful, but WITHOUT
  20  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  21  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
  22  * more details.
  23  */
  24
  25 #include <linux/pci.h>
  26
  27 #include "../comedidev.h"
  28
  29 /*
  30  * Register I/O map
  31  */
  32 #define APCI16XX_IN_REG(x)              (((x) * 4) + 0x08)
  33 #define APCI16XX_OUT_REG(x)             (((x) * 4) + 0x14)
  34 #define APCI16XX_DIR_REG(x)             (((x) * 4) + 0x20)
  35
  36 enum apci16xx_boardid {
  37         BOARD_APCI1648,
  38         BOARD_APCI1696,
  39 };
  40
  41 struct apci16xx_boardinfo {
  42         const char *name;
  43         int n_chan;
  44 };
  45
  46 static const struct apci16xx_boardinfo apci16xx_boardtypes[] = {
  47         [BOARD_APCI1648] = {
  48                 .name           = "apci1648",
  49                 .n_chan         = 48,           /* 2 subdevices */
  50         },
  51         [BOARD_APCI1696] = {
  52                 .name           = "apci1696",
  53                 .n_chan         = 96,           /* 3 subdevices */
  54         },
  55 };
  56
  57 static int apci16xx_insn_config(struct comedi_device *dev,
  58                                 struct comedi_subdevice *s,
  59                                 struct comedi_insn *insn,
  60                                 unsigned int *data)
  61 {
  62         unsigned int chan_mask = 1 << CR_CHAN(insn->chanspec);
  63         unsigned int bits;
  64
  65         /*
  66          * Each 8-bit "port" is configurable as either input or
  67          * output. Changing the configuration of any channel in
  68          * a port changes the entire port.
  69          */
  70         if (chan_mask & 0x000000ff)
  71                 bits = 0x000000ff;
  72         else if (chan_mask & 0x0000ff00)
  73                 bits = 0x0000ff00;
  74         else if (chan_mask & 0x00ff0000)
  75                 bits = 0x00ff0000;
  76         else
  77                 bits = 0xff000000;
  78
  79         switch (data[0]) {
  80         case INSN_CONFIG_DIO_INPUT:
  81                 s->io_bits &= ~bits;
  82                 break;
  83         case INSN_CONFIG_DIO_OUTPUT:
  84                 s->io_bits |= bits;
  85                 break;
  86         case INSN_CONFIG_DIO_QUERY:
  87                 data[1] = (s->io_bits & bits) ? COMEDI_INPUT : COMEDI_OUTPUT;
  88                 return insn->n;
  89         default:
  90                 return -EINVAL;
  91         }
  92
  93         outl(s->io_bits, dev->iobase + APCI16XX_DIR_REG(s->index));
  94
  95         return insn->n;
  96 }
  97
  98 static int apci16xx_dio_insn_bits(struct comedi_device *dev,
  99                                   struct comedi_subdevice *s,
 100                                   struct comedi_insn *insn,
 101                                   unsigned int *data)
 102 {
 103         unsigned int mask = data[0];
 104         unsigned int bits = data[1];
 105
 106         /* Only update the channels configured as outputs */
 107         mask &= s->io_bits;
 108         if (mask) {
 109                 s->state &= ~mask;
 110                 s->state |= (bits & mask);
 111
 112                 outl(s->state, dev->iobase + APCI16XX_OUT_REG(s->index));
 113         }
 114
 115         data[1] = inl(dev->iobase + APCI16XX_IN_REG(s->index));
 116
 117         return insn->n;
 118 }
 119
 120 static int apci16xx_auto_attach(struct comedi_device *dev,
 121                                 unsigned long context)
 122 {
 123         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 124         const struct apci16xx_boardinfo *board = NULL;
 125         struct comedi_subdevice *s;
 126         unsigned int n_subdevs;
 127         unsigned int last;
 128         int i;
 129         int ret;
 130
 131         if (context < ARRAY_SIZE(apci16xx_boardtypes))
 132                 board = &apci16xx_boardtypes[context];
 133         if (!board)
 134                 return -ENODEV;
 135         dev->board_ptr = board;
 136         dev->board_name = board->name;
 137
 138         ret = comedi_pci_enable(dev);
 139         if (ret)
 140                 return ret;
 141
 142         dev->iobase = pci_resource_start(pcidev, 0);
 143
 144         /*
 145          * Work out the nubmer of subdevices needed to support all the
 146          * digital i/o channels on the board. Each subdevice supports
 147          * up to 32 channels.
 148          */
 149         n_subdevs = board->n_chan / 32;
 150         if ((n_subdevs * 32) < board->n_chan) {
 151                 last = board->n_chan - (n_subdevs * 32);
 152                 n_subdevs++;
 153         } else {
 154                 last = 0;
 155         }
 156
 157         ret = comedi_alloc_subdevices(dev, n_subdevs);
 158         if (ret)
 159                 return ret;
 160
 161         /* Initialize the TTL digital i/o subdevices */
 162         for (i = 0; i < n_subdevs; i++) {
 163                 s = &dev->subdevices[i];
 164                 s->type         = COMEDI_SUBD_DIO;
 165                 s->subdev_flags = SDF_WRITEABLE | SDF_READABLE;
 166                 s->n_chan       = ((i * 32) < board->n_chan) ? 32 : last;
 167                 s->maxdata      = 1;
 168                 s->range_table  = &range_digital;
 169                 s->insn_config  = apci16xx_insn_config;
 170                 s->insn_bits    = apci16xx_dio_insn_bits;
 171
 172                 /* Default all channels to inputs */
 173                 s->io_bits      = 0;
 174                 outl(s->io_bits, dev->iobase + APCI16XX_DIR_REG(i));
 175         }
 176
 177         return 0;
 178 }
 179
 180 static struct comedi_driver apci16xx_driver = {
 181         .driver_name    = "addi_apci_16xx",
 182         .module         = THIS_MODULE,
 183         .auto_attach    = apci16xx_auto_attach,
 184         .detach         = comedi_pci_disable,
 185 };
 186
 187 static int apci16xx_pci_probe(struct pci_dev *dev,
 188                               const struct pci_device_id *id)
 189 {
 190         return comedi_pci_auto_config(dev, &apci16xx_driver, id->driver_data);
 191 }
 192
 193 static DEFINE_PCI_DEVICE_TABLE(apci16xx_pci_table) = {
 194         { PCI_VDEVICE(ADDIDATA, 0x1009), BOARD_APCI1648 },
 195         { PCI_VDEVICE(ADDIDATA, 0x100a), BOARD_APCI1696 },
 196         { 0 }
 197 };
 198 MODULE_DEVICE_TABLE(pci, apci16xx_pci_table);
 199
 200 static struct pci_driver apci16xx_pci_driver = {
 201         .name           = "addi_apci_16xx",
 202         .id_table       = apci16xx_pci_table,
 203         .probe          = apci16xx_pci_probe,
 204         .remove         = comedi_pci_auto_unconfig,
 205 };
 206 module_comedi_pci_driver(apci16xx_driver, apci16xx_pci_driver);
 207
 208 MODULE_DESCRIPTION("ADDI-DATA APCI-1648/1696, TTL I/O boards");
 209 MODULE_AUTHOR("Comedi http://www.comedi.org");
 210 MODULE_LICENSE("GPL");