drivers/staging/comedi/drivers/adl_pci6208.c

   1 /*
   2  * adl_pci6208.c
   3  * Comedi driver for ADLink 6208 series cards
   4  *
   5  * COMEDI - Linux Control and Measurement Device Interface
   6  * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  */
  18
  19 /*
  20  * Driver: adl_pci6208
  21  * Description: ADLink PCI-6208/6216 Series Multi-channel Analog Output Cards
  22  * Devices: (ADLink) PCI-6208 [adl_pci6208]
  23  *          (ADLink) PCI-6216 [adl_pci6216]
  24  * Author: nsyeow <nsyeow@pd.jaring.my>
  25  * Updated: Fri, 30 Jan 2004 14:44:27 +0800
  26  * Status: untested
  27  *
  28  * Configuration Options: not applicable, uses PCI auto config
  29  */
  30
  31 #include <linux/module.h>
  32 #include <linux/delay.h>
  33 #include <linux/pci.h>
  34
  35 #include "../comedidev.h"
  36
  37 /*
  38  * PCI-6208/6216-GL register map
  39  */
  40 #define PCI6208_AO_CONTROL(x)           (0x00 + (2 * (x)))
  41 #define PCI6208_AO_STATUS               0x00
  42 #define PCI6208_AO_STATUS_DATA_SEND     (1 << 0)
  43 #define PCI6208_DIO                     0x40
  44 #define PCI6208_DIO_DO_MASK             (0x0f)
  45 #define PCI6208_DIO_DO_SHIFT            (0)
  46 #define PCI6208_DIO_DI_MASK             (0xf0)
  47 #define PCI6208_DIO_DI_SHIFT            (4)
  48
  49 #define PCI6208_MAX_AO_CHANNELS         16
  50
  51 enum pci6208_boardid {
  52         BOARD_PCI6208,
  53         BOARD_PCI6216,
  54 };
  55
  56 struct pci6208_board {
  57         const char *name;
  58         int ao_chans;
  59 };
  60
  61 static const struct pci6208_board pci6208_boards[] = {
  62         [BOARD_PCI6208] = {
  63                 .name           = "adl_pci6208",
  64                 .ao_chans       = 8,
  65         },
  66         [BOARD_PCI6216] = {
  67                 .name           = "adl_pci6216",
  68                 .ao_chans       = 16,
  69         },
  70 };
  71
  72 struct pci6208_private {
  73         unsigned int ao_readback[PCI6208_MAX_AO_CHANNELS];
  74 };
  75
  76 static int pci6208_ao_eoc(struct comedi_device *dev,
  77                           struct comedi_subdevice *s,
  78                           struct comedi_insn *insn,
  79                           unsigned long context)
  80 {
  81         unsigned int status;
  82
  83         status = inw(dev->iobase + PCI6208_AO_STATUS);
  84         if ((status & PCI6208_AO_STATUS_DATA_SEND) == 0)
  85                 return 0;
  86         return -EBUSY;
  87 }
  88
  89 static int pci6208_ao_insn_write(struct comedi_device *dev,
  90                                  struct comedi_subdevice *s,
  91                                  struct comedi_insn *insn,
  92                                  unsigned int *data)
  93 {
  94         struct pci6208_private *devpriv = dev->private;
  95         unsigned int chan = CR_CHAN(insn->chanspec);
  96         unsigned int val = devpriv->ao_readback[chan];
  97         int ret;
  98         int i;
  99
 100         for (i = 0; i < insn->n; i++) {
 101                 val = data[i];
 102
 103                 /* D/A transfer rate is 2.2us */
 104                 ret = comedi_timeout(dev, s, insn, pci6208_ao_eoc, 0);
 105                 if (ret)
 106                         return ret;
 107
 108                 /* the hardware expects two's complement values */
 109                 outw(comedi_offset_munge(s, val),
 110                      dev->iobase + PCI6208_AO_CONTROL(chan));
 111         }
 112         devpriv->ao_readback[chan] = val;
 113
 114         return insn->n;
 115 }
 116
 117 static int pci6208_ao_insn_read(struct comedi_device *dev,
 118                                 struct comedi_subdevice *s,
 119                                 struct comedi_insn *insn,
 120                                 unsigned int *data)
 121 {
 122         struct pci6208_private *devpriv = dev->private;
 123         unsigned int chan = CR_CHAN(insn->chanspec);
 124         int i;
 125
 126         for (i = 0; i < insn->n; i++)
 127                 data[i] = devpriv->ao_readback[chan];
 128
 129         return insn->n;
 130 }
 131
 132 static int pci6208_di_insn_bits(struct comedi_device *dev,
 133                                 struct comedi_subdevice *s,
 134                                 struct comedi_insn *insn,
 135                                 unsigned int *data)
 136 {
 137         unsigned int val;
 138
 139         val = inw(dev->iobase + PCI6208_DIO);
 140         val = (val & PCI6208_DIO_DI_MASK) >> PCI6208_DIO_DI_SHIFT;
 141
 142         data[1] = val;
 143
 144         return insn->n;
 145 }
 146
 147 static int pci6208_do_insn_bits(struct comedi_device *dev,
 148                                 struct comedi_subdevice *s,
 149                                 struct comedi_insn *insn,
 150                                 unsigned int *data)
 151 {
 152         if (comedi_dio_update_state(s, data))
 153                 outw(s->state, dev->iobase + PCI6208_DIO);
 154
 155         data[1] = s->state;
 156
 157         return insn->n;
 158 }
 159
 160 static int pci6208_auto_attach(struct comedi_device *dev,
 161                                unsigned long context)
 162 {
 163         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 164         const struct pci6208_board *boardinfo = NULL;
 165         struct pci6208_private *devpriv;
 166         struct comedi_subdevice *s;
 167         unsigned int val;
 168         int ret;
 169
 170         if (context < ARRAY_SIZE(pci6208_boards))
 171                 boardinfo = &pci6208_boards[context];
 172         if (!boardinfo)
 173                 return -ENODEV;
 174         dev->board_ptr = boardinfo;
 175         dev->board_name = boardinfo->name;
 176
 177         devpriv = comedi_alloc_devpriv(dev, sizeof(*devpriv));
 178         if (!devpriv)
 179                 return -ENOMEM;
 180
 181         ret = comedi_pci_enable(dev);
 182         if (ret)
 183                 return ret;
 184         dev->iobase = pci_resource_start(pcidev, 2);
 185
 186         ret = comedi_alloc_subdevices(dev, 3);
 187         if (ret)
 188                 return ret;
 189
 190         s = &dev->subdevices[0];
 191         /* analog output subdevice */
 192         s->type         = COMEDI_SUBD_AO;
 193         s->subdev_flags = SDF_WRITABLE;
 194         s->n_chan       = boardinfo->ao_chans;
 195         s->maxdata      = 0xffff;
 196         s->range_table  = &range_bipolar10;
 197         s->insn_write   = pci6208_ao_insn_write;
 198         s->insn_read    = pci6208_ao_insn_read;
 199
 200         s = &dev->subdevices[1];
 201         /* digital input subdevice */
 202         s->type         = COMEDI_SUBD_DI;
 203         s->subdev_flags = SDF_READABLE;
 204         s->n_chan       = 4;
 205         s->maxdata      = 1;
 206         s->range_table  = &range_digital;
 207         s->insn_bits    = pci6208_di_insn_bits;
 208
 209         s = &dev->subdevices[2];
 210         /* digital output subdevice */
 211         s->type         = COMEDI_SUBD_DO;
 212         s->subdev_flags = SDF_WRITABLE;
 213         s->n_chan       = 4;
 214         s->maxdata      = 1;
 215         s->range_table  = &range_digital;
 216         s->insn_bits    = pci6208_do_insn_bits;
 217
 218         /*
 219          * Get the read back signals from the digital outputs
 220          * and save it as the initial state for the subdevice.
 221          */
 222         val = inw(dev->iobase + PCI6208_DIO);
 223         val = (val & PCI6208_DIO_DO_MASK) >> PCI6208_DIO_DO_SHIFT;
 224         s->state        = val;
 225
 226         return 0;
 227 }
 228
 229 static struct comedi_driver adl_pci6208_driver = {
 230         .driver_name    = "adl_pci6208",
 231         .module         = THIS_MODULE,
 232         .auto_attach    = pci6208_auto_attach,
 233         .detach         = comedi_pci_disable,
 234 };
 235
 236 static int adl_pci6208_pci_probe(struct pci_dev *dev,
 237                                  const struct pci_device_id *id)
 238 {
 239         return comedi_pci_auto_config(dev, &adl_pci6208_driver,
 240                                       id->driver_data);
 241 }
 242
 243 static const struct pci_device_id adl_pci6208_pci_table[] = {
 244         { PCI_VDEVICE(ADLINK, 0x6208), BOARD_PCI6208 },
 245         { PCI_VDEVICE(ADLINK, 0x6216), BOARD_PCI6216 },
 246         { 0 }
 247 };
 248 MODULE_DEVICE_TABLE(pci, adl_pci6208_pci_table);
 249
 250 static struct pci_driver adl_pci6208_pci_driver = {
 251         .name           = "adl_pci6208",
 252         .id_table       = adl_pci6208_pci_table,
 253         .probe          = adl_pci6208_pci_probe,
 254         .remove         = comedi_pci_auto_unconfig,
 255 };
 256 module_comedi_pci_driver(adl_pci6208_driver, adl_pci6208_pci_driver);
 257
 258 MODULE_AUTHOR("Comedi http://www.comedi.org");
 259 MODULE_DESCRIPTION("Comedi driver for ADLink 6208 series cards");
 260 MODULE_LICENSE("GPL");