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Linux/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/module.h>
 26 #include <linux/pci.h>
 27 
 28 #include "../comedidev.h"
 29 
 30 /*
 31  * Register I/O map
 32  */
 33 #define APCI16XX_IN_REG(x)              (((x) * 4) + 0x08)
 34 #define APCI16XX_OUT_REG(x)             (((x) * 4) + 0x14)
 35 #define APCI16XX_DIR_REG(x)             (((x) * 4) + 0x20)
 36 
 37 enum apci16xx_boardid {
 38         BOARD_APCI1648,
 39         BOARD_APCI1696,
 40 };
 41 
 42 struct apci16xx_boardinfo {
 43         const char *name;
 44         int n_chan;
 45 };
 46 
 47 static const struct apci16xx_boardinfo apci16xx_boardtypes[] = {
 48         [BOARD_APCI1648] = {
 49                 .name           = "apci1648",
 50                 .n_chan         = 48,           /* 2 subdevices */
 51         },
 52         [BOARD_APCI1696] = {
 53                 .name           = "apci1696",
 54                 .n_chan         = 96,           /* 3 subdevices */
 55         },
 56 };
 57 
 58 static int apci16xx_insn_config(struct comedi_device *dev,
 59                                 struct comedi_subdevice *s,
 60                                 struct comedi_insn *insn,
 61                                 unsigned int *data)
 62 {
 63         unsigned int chan = CR_CHAN(insn->chanspec);
 64         unsigned int mask;
 65         int ret;
 66 
 67         if (chan < 8)
 68                 mask = 0x000000ff;
 69         else if (chan < 16)
 70                 mask = 0x0000ff00;
 71         else if (chan < 24)
 72                 mask = 0x00ff0000;
 73         else
 74                 mask = 0xff000000;
 75 
 76         ret = comedi_dio_insn_config(dev, s, insn, data, mask);
 77         if (ret)
 78                 return ret;
 79 
 80         outl(s->io_bits, dev->iobase + APCI16XX_DIR_REG(s->index));
 81 
 82         return insn->n;
 83 }
 84 
 85 static int apci16xx_dio_insn_bits(struct comedi_device *dev,
 86                                   struct comedi_subdevice *s,
 87                                   struct comedi_insn *insn,
 88                                   unsigned int *data)
 89 {
 90         if (comedi_dio_update_state(s, data))
 91                 outl(s->state, dev->iobase + APCI16XX_OUT_REG(s->index));
 92 
 93         data[1] = inl(dev->iobase + APCI16XX_IN_REG(s->index));
 94 
 95         return insn->n;
 96 }
 97 
 98 static int apci16xx_auto_attach(struct comedi_device *dev,
 99                                 unsigned long context)
100 {
101         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
102         const struct apci16xx_boardinfo *board = NULL;
103         struct comedi_subdevice *s;
104         unsigned int n_subdevs;
105         unsigned int last;
106         int i;
107         int ret;
108 
109         if (context < ARRAY_SIZE(apci16xx_boardtypes))
110                 board = &apci16xx_boardtypes[context];
111         if (!board)
112                 return -ENODEV;
113         dev->board_ptr = board;
114         dev->board_name = board->name;
115 
116         ret = comedi_pci_enable(dev);
117         if (ret)
118                 return ret;
119 
120         dev->iobase = pci_resource_start(pcidev, 0);
121 
122         /*
123          * Work out the nubmer of subdevices needed to support all the
124          * digital i/o channels on the board. Each subdevice supports
125          * up to 32 channels.
126          */
127         n_subdevs = board->n_chan / 32;
128         if ((n_subdevs * 32) < board->n_chan) {
129                 last = board->n_chan - (n_subdevs * 32);
130                 n_subdevs++;
131         } else {
132                 last = 0;
133         }
134 
135         ret = comedi_alloc_subdevices(dev, n_subdevs);
136         if (ret)
137                 return ret;
138 
139         /* Initialize the TTL digital i/o subdevices */
140         for (i = 0; i < n_subdevs; i++) {
141                 s = &dev->subdevices[i];
142                 s->type         = COMEDI_SUBD_DIO;
143                 s->subdev_flags = SDF_WRITEABLE | SDF_READABLE;
144                 s->n_chan       = ((i * 32) < board->n_chan) ? 32 : last;
145                 s->maxdata      = 1;
146                 s->range_table  = &range_digital;
147                 s->insn_config  = apci16xx_insn_config;
148                 s->insn_bits    = apci16xx_dio_insn_bits;
149 
150                 /* Default all channels to inputs */
151                 s->io_bits      = 0;
152                 outl(s->io_bits, dev->iobase + APCI16XX_DIR_REG(i));
153         }
154 
155         return 0;
156 }
157 
158 static struct comedi_driver apci16xx_driver = {
159         .driver_name    = "addi_apci_16xx",
160         .module         = THIS_MODULE,
161         .auto_attach    = apci16xx_auto_attach,
162         .detach         = comedi_pci_disable,
163 };
164 
165 static int apci16xx_pci_probe(struct pci_dev *dev,
166                               const struct pci_device_id *id)
167 {
168         return comedi_pci_auto_config(dev, &apci16xx_driver, id->driver_data);
169 }
170 
171 static const struct pci_device_id apci16xx_pci_table[] = {
172         { PCI_VDEVICE(ADDIDATA, 0x1009), BOARD_APCI1648 },
173         { PCI_VDEVICE(ADDIDATA, 0x100a), BOARD_APCI1696 },
174         { 0 }
175 };
176 MODULE_DEVICE_TABLE(pci, apci16xx_pci_table);
177 
178 static struct pci_driver apci16xx_pci_driver = {
179         .name           = "addi_apci_16xx",
180         .id_table       = apci16xx_pci_table,
181         .probe          = apci16xx_pci_probe,
182         .remove         = comedi_pci_auto_unconfig,
183 };
184 module_comedi_pci_driver(apci16xx_driver, apci16xx_pci_driver);
185 
186 MODULE_DESCRIPTION("ADDI-DATA APCI-1648/1696, TTL I/O boards");
187 MODULE_AUTHOR("Comedi http://www.comedi.org");
188 MODULE_LICENSE("GPL");
189 

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