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), PCI-6216
  23  * Author: nsyeow <nsyeow@pd.jaring.my>
  24  * Updated: Wed, 11 Feb 2015 11:37:18 +0000
  25  * Status: untested
  26  *
  27  * Configuration Options: not applicable, uses PCI auto config
  28  *
  29  * All supported devices share the same PCI device ID and are treated as a
  30  * PCI-6216 with 16 analog output channels.  On a PCI-6208, the upper 8
  31  * channels exist in registers, but don't go to DAC chips.
  32  */
  33
  34 #include <linux/module.h>
  35 #include <linux/delay.h>
  36
  37 #include "../comedi_pci.h"
  38
  39 /*
  40  * PCI-6208/6216-GL register map
  41  */
  42 #define PCI6208_AO_CONTROL(x)           (0x00 + (2 * (x)))
  43 #define PCI6208_AO_STATUS               0x00
  44 #define PCI6208_AO_STATUS_DATA_SEND     BIT(0)
  45 #define PCI6208_DIO                     0x40
  46 #define PCI6208_DIO_DO_MASK             (0x0f)
  47 #define PCI6208_DIO_DO_SHIFT            (0)
  48 #define PCI6208_DIO_DI_MASK             (0xf0)
  49 #define PCI6208_DIO_DI_SHIFT            (4)
  50
  51 static int pci6208_ao_eoc(struct comedi_device *dev,
  52                           struct comedi_subdevice *s,
  53                           struct comedi_insn *insn,
  54                           unsigned long context)
  55 {
  56         unsigned int status;
  57
  58         status = inw(dev->iobase + PCI6208_AO_STATUS);
  59         if ((status & PCI6208_AO_STATUS_DATA_SEND) == 0)
  60                 return 0;
  61         return -EBUSY;
  62 }
  63
  64 static int pci6208_ao_insn_write(struct comedi_device *dev,
  65                                  struct comedi_subdevice *s,
  66                                  struct comedi_insn *insn,
  67                                  unsigned int *data)
  68 {
  69         unsigned int chan = CR_CHAN(insn->chanspec);
  70         unsigned int val = s->readback[chan];
  71         int ret;
  72         int i;
  73
  74         for (i = 0; i < insn->n; i++) {
  75                 val = data[i];
  76
  77                 /* D/A transfer rate is 2.2us */
  78                 ret = comedi_timeout(dev, s, insn, pci6208_ao_eoc, 0);
  79                 if (ret)
  80                         return ret;
  81
  82                 /* the hardware expects two's complement values */
  83                 outw(comedi_offset_munge(s, val),
  84                      dev->iobase + PCI6208_AO_CONTROL(chan));
  85
  86                 s->readback[chan] = val;
  87         }
  88
  89         return insn->n;
  90 }
  91
  92 static int pci6208_di_insn_bits(struct comedi_device *dev,
  93                                 struct comedi_subdevice *s,
  94                                 struct comedi_insn *insn,
  95                                 unsigned int *data)
  96 {
  97         unsigned int val;
  98
  99         val = inw(dev->iobase + PCI6208_DIO);
 100         val = (val & PCI6208_DIO_DI_MASK) >> PCI6208_DIO_DI_SHIFT;
 101
 102         data[1] = val;
 103
 104         return insn->n;
 105 }
 106
 107 static int pci6208_do_insn_bits(struct comedi_device *dev,
 108                                 struct comedi_subdevice *s,
 109                                 struct comedi_insn *insn,
 110                                 unsigned int *data)
 111 {
 112         if (comedi_dio_update_state(s, data))
 113                 outw(s->state, dev->iobase + PCI6208_DIO);
 114
 115         data[1] = s->state;
 116
 117         return insn->n;
 118 }
 119
 120 static int pci6208_auto_attach(struct comedi_device *dev,
 121                                unsigned long context_unused)
 122 {
 123         struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 124         struct comedi_subdevice *s;
 125         unsigned int val;
 126         int ret;
 127
 128         ret = comedi_pci_enable(dev);
 129         if (ret)
 130                 return ret;
 131         dev->iobase = pci_resource_start(pcidev, 2);
 132
 133         ret = comedi_alloc_subdevices(dev, 3);
 134         if (ret)
 135                 return ret;
 136
 137         s = &dev->subdevices[0];
 138         /* analog output subdevice */
 139         s->type         = COMEDI_SUBD_AO;
 140         s->subdev_flags = SDF_WRITABLE;
 141         s->n_chan       = 16;   /* Only 8 usable on PCI-6208 */
 142         s->maxdata      = 0xffff;
 143         s->range_table  = &range_bipolar10;
 144         s->insn_write   = pci6208_ao_insn_write;
 145
 146         ret = comedi_alloc_subdev_readback(s);
 147         if (ret)
 148                 return ret;
 149
 150         s = &dev->subdevices[1];
 151         /* digital input subdevice */
 152         s->type         = COMEDI_SUBD_DI;
 153         s->subdev_flags = SDF_READABLE;
 154         s->n_chan       = 4;
 155         s->maxdata      = 1;
 156         s->range_table  = &range_digital;
 157         s->insn_bits    = pci6208_di_insn_bits;
 158
 159         s = &dev->subdevices[2];
 160         /* digital output subdevice */
 161         s->type         = COMEDI_SUBD_DO;
 162         s->subdev_flags = SDF_WRITABLE;
 163         s->n_chan       = 4;
 164         s->maxdata      = 1;
 165         s->range_table  = &range_digital;
 166         s->insn_bits    = pci6208_do_insn_bits;
 167
 168         /*
 169          * Get the read back signals from the digital outputs
 170          * and save it as the initial state for the subdevice.
 171          */
 172         val = inw(dev->iobase + PCI6208_DIO);
 173         val = (val & PCI6208_DIO_DO_MASK) >> PCI6208_DIO_DO_SHIFT;
 174         s->state        = val;
 175
 176         return 0;
 177 }
 178
 179 static struct comedi_driver adl_pci6208_driver = {
 180         .driver_name    = "adl_pci6208",
 181         .module         = THIS_MODULE,
 182         .auto_attach    = pci6208_auto_attach,
 183         .detach         = comedi_pci_detach,
 184 };
 185
 186 static int adl_pci6208_pci_probe(struct pci_dev *dev,
 187                                  const struct pci_device_id *id)
 188 {
 189         return comedi_pci_auto_config(dev, &adl_pci6208_driver,
 190                                       id->driver_data);
 191 }
 192
 193 static const struct pci_device_id adl_pci6208_pci_table[] = {
 194         { PCI_DEVICE(PCI_VENDOR_ID_ADLINK, 0x6208) },
 195         { PCI_DEVICE_SUB(PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
 196                          0x9999, 0x6208) },
 197         { 0 }
 198 };
 199 MODULE_DEVICE_TABLE(pci, adl_pci6208_pci_table);
 200
 201 static struct pci_driver adl_pci6208_pci_driver = {
 202         .name           = "adl_pci6208",
 203         .id_table       = adl_pci6208_pci_table,
 204         .probe          = adl_pci6208_pci_probe,
 205         .remove         = comedi_pci_auto_unconfig,
 206 };
 207 module_comedi_pci_driver(adl_pci6208_driver, adl_pci6208_pci_driver);
 208
 209 MODULE_AUTHOR("Comedi http://www.comedi.org");
 210 MODULE_DESCRIPTION("Comedi driver for ADLink 6208 series cards");
 211 MODULE_LICENSE("GPL");