linux/drivers/staging/comedi/drivers/adl_pci6208.c
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   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
  51static 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
  64static 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
  92static 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
 107static 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
 120static 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
 179static 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
 186static 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
 193static 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};
 199MODULE_DEVICE_TABLE(pci, adl_pci6208_pci_table);
 200
 201static 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};
 207module_comedi_pci_driver(adl_pci6208_driver, adl_pci6208_pci_driver);
 208
 209MODULE_AUTHOR("Comedi http://www.comedi.org");
 210MODULE_DESCRIPTION("Comedi driver for ADLink 6208 series cards");
 211MODULE_LICENSE("GPL");
 212
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