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  * You should have received a copy of the GNU General Public License along
  25  * with this program; if not, write to the Free Software Foundation, Inc.,
  26  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  27  *
  28  * You should also find the complete GPL in the COPYING file accompanying
  29  * this source code.
  30  */
  31
  32 #include <linux/pci.h>
  33
  34 #include "../comedidev.h"
  35
  36 /*
  37  * PCI device ids supported by this driver
  38  */
  39 #define PCI_DEVICE_ID_APCI1648          0x1009
  40 #define PCI_DEVICE_ID_APCI1696          0x100a
  41
  42 /*
  43  * Register I/O map
  44  */
  45 #define APCI16XX_IN_REG(x)              (((x) * 4) + 0x08)
  46 #define APCI16XX_OUT_REG(x)             (((x) * 4) + 0x14)
  47 #define APCI16XX_DIR_REG(x)             (((x) * 4) + 0x20)
  48
  49 struct apci16xx_boardinfo {
  50         const char *name;
  51         unsigned short vendor;
  52         unsigned short device;
  53         int n_chan;
  54 };
  55
  56 static const struct apci16xx_boardinfo apci16xx_boardtypes[] = {
  57         {
  58                 .name           = "apci1648",
  59                 .vendor         = PCI_VENDOR_ID_ADDIDATA,
  60                 .device         = PCI_DEVICE_ID_APCI1648,
  61                 .n_chan         = 48,           /* 2 subdevices */
  62         }, {
  63                 .name           = "apci1696",
  64                 .vendor         = PCI_VENDOR_ID_ADDIDATA,
  65                 .device         = PCI_DEVICE_ID_APCI1696,
  66                 .n_chan         = 96,           /* 3 subdevices */
  67         },
  68 };
  69
  70 static int apci16xx_insn_config(struct comedi_device *dev,
  71                                 struct comedi_subdevice *s,
  72                                 struct comedi_insn *insn,
  73                                 unsigned int *data)
  74 {
  75         unsigned int chan_mask = 1 << CR_CHAN(insn->chanspec);
  76         unsigned int bits;
  77
  78         /*
  79          * Each 8-bit "port" is configurable as either input or
  80          * output. Changing the configuration of any channel in
  81          * a port changes the entire port.
  82          */
  83         if (chan_mask & 0x000000ff)
  84                 bits = 0x000000ff;
  85         else if (chan_mask & 0x0000ff00)
  86                 bits = 0x0000ff00;
  87         else if (chan_mask & 0x00ff0000)
  88                 bits = 0x00ff0000;
  89         else
  90                 bits = 0xff000000;
  91
  92         switch (data[0]) {
  93         case INSN_CONFIG_DIO_INPUT:
  94                 s->io_bits &= ~bits;
  95                 break;
  96         case INSN_CONFIG_DIO_OUTPUT:
  97                 s->io_bits |= bits;
  98                 break;
  99         case INSN_CONFIG_DIO_QUERY:
 100                 data[1] = (s->io_bits & bits) ? COMEDI_INPUT : COMEDI_OUTPUT;
 101                 return insn->n;
 102         default:
 103                 return -EINVAL;
 104         }
 105
 106         outl(s->io_bits, dev->iobase + APCI16XX_DIR_REG(s->index));
 107
 108         return insn->n;
 109 }
 110
 111 static int apci16xx_dio_insn_bits(struct comedi_device *dev,
 112                                   struct comedi_subdevice *s,
 113                                   struct comedi_insn *insn,
 114                                   unsigned int *data)
 115 {
 116         unsigned int mask = data[0];
 117         unsigned int bits = data[1];
 118
 119         /* Only update the channels configured as outputs */
 120         mask &= s->io_bits;
 121         if (mask) {
 122                 s->state &= ~mask;
 123                 s->state |= (bits & mask);
 124
 125                 outl(s->state, dev->iobase + APCI16XX_OUT_REG(s->index));
 126         }
 127
 128         data[1] = inl(dev->iobase + APCI16XX_IN_REG(s->index));
 129
 130         return insn->n;
 131 }
 132
 133 static const void *apci16xx_find_boardinfo(struct comedi_device *dev,
 134                                            struct pci_dev *pcidev)
 135 {
 136         const struct apci16xx_boardinfo *board;
 137         int i;
 138
 139         for (i = 0; i < ARRAY_SIZE(apci16xx_boardtypes); i++) {
 140                 board = &apci16xx_boardtypes[i];
 141                 if (board->vendor == pcidev->vendor &&
 142                     board->device == pcidev->device)
 143                         return board;
 144         }
 145         return NULL;
 146 }
 147
 148 static int apci16xx_auto_attach(struct comedi_device *dev,
 149                                 unsigned long context_unused)
 150 {
 151         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 152         const struct apci16xx_boardinfo *board;
 153         struct comedi_subdevice *s;
 154         unsigned int n_subdevs;
 155         unsigned int last;
 156         int i;
 157         int ret;
 158
 159         board = apci16xx_find_boardinfo(dev, pcidev);
 160         if (!board)
 161                 return -ENODEV;
 162         dev->board_ptr = board;
 163         dev->board_name = board->name;
 164
 165         ret = comedi_pci_enable(pcidev, dev->board_name);
 166         if (ret)
 167                 return ret;
 168
 169         dev->iobase = pci_resource_start(pcidev, 0);
 170
 171         /*
 172          * Work out the nubmer of subdevices needed to support all the
 173          * digital i/o channels on the board. Each subdevice supports
 174          * up to 32 channels.
 175          */
 176         n_subdevs = board->n_chan / 32;
 177         if ((n_subdevs * 32) < board->n_chan) {
 178                 last = board->n_chan - (n_subdevs * 32);
 179                 n_subdevs++;
 180         } else {
 181                 last = 0;
 182         }
 183
 184         ret = comedi_alloc_subdevices(dev, n_subdevs);
 185         if (ret)
 186                 return ret;
 187
 188         /* Initialize the TTL digital i/o subdevices */
 189         for (i = 0; i < n_subdevs; i++) {
 190                 s = &dev->subdevices[i];
 191                 s->type         = COMEDI_SUBD_DIO;
 192                 s->subdev_flags = SDF_WRITEABLE | SDF_READABLE;
 193                 s->n_chan       = ((i * 32) < board->n_chan) ? 32 : last;
 194                 s->maxdata      = 1;
 195                 s->range_table  = &range_digital;
 196                 s->insn_config  = apci16xx_insn_config;
 197                 s->insn_bits    = apci16xx_dio_insn_bits;
 198
 199                 /* Default all channels to inputs */
 200                 s->io_bits      = 0;
 201                 outl(s->io_bits, dev->iobase + APCI16XX_DIR_REG(i));
 202         }
 203
 204         return 0;
 205 }
 206
 207 static void apci16xx_detach(struct comedi_device *dev)
 208 {
 209         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 210
 211         if (pcidev) {
 212                 if (dev->iobase)
 213                         comedi_pci_disable(pcidev);
 214         }
 215 }
 216
 217 static struct comedi_driver apci16xx_driver = {
 218         .driver_name    = "addi_apci_16xx",
 219         .module         = THIS_MODULE,
 220         .auto_attach    = apci16xx_auto_attach,
 221         .detach         = apci16xx_detach,
 222         .num_names      = ARRAY_SIZE(apci16xx_boardtypes),
 223         .board_name     = &apci16xx_boardtypes[0].name,
 224         .offset         = sizeof(struct apci16xx_boardinfo),
 225 };
 226
 227 static int apci16xx_pci_probe(struct pci_dev *dev,
 228                                         const struct pci_device_id *ent)
 229 {
 230         return comedi_pci_auto_config(dev, &apci16xx_driver);
 231 }
 232
 233 static DEFINE_PCI_DEVICE_TABLE(apci16xx_pci_table) = {
 234         { PCI_DEVICE(PCI_VENDOR_ID_ADDIDATA, PCI_DEVICE_ID_APCI1648) },
 235         { PCI_DEVICE(PCI_VENDOR_ID_ADDIDATA, PCI_DEVICE_ID_APCI1696) },
 236         { 0 }
 237 };
 238 MODULE_DEVICE_TABLE(pci, apci16xx_pci_table);
 239
 240 static struct pci_driver apci16xx_pci_driver = {
 241         .name           = "addi_apci_16xx",
 242         .id_table       = apci16xx_pci_table,
 243         .probe          = apci16xx_pci_probe,
 244         .remove         = comedi_pci_auto_unconfig,
 245 };
 246 module_comedi_pci_driver(apci16xx_driver, apci16xx_pci_driver);
 247
 248 MODULE_DESCRIPTION("ADDI-DATA APCI-1648/1696, TTL I/O boards");
 249 MODULE_AUTHOR("Comedi http://www.comedi.org");
 250 MODULE_LICENSE("GPL");