LXR linux/drivers/comedi/drivers/adl

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * adl_pci6208.c
   4 * Comedi driver for ADLink 6208 series cards
   5 *
   6 * COMEDI - Linux Control and Measurement Device Interface
   7 * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
   8 */
   9
  10/*
  11 * Driver: adl_pci6208
  12 * Description: ADLink PCI-6208/6216 Series Multi-channel Analog Output Cards
  13 * Devices: [ADLink] PCI-6208 (adl_pci6208), PCI-6216
  14 * Author: nsyeow <nsyeow@pd.jaring.my>
  15 * Updated: Wed, 11 Feb 2015 11:37:18 +0000
  16 * Status: untested
  17 *
  18 * Configuration Options: not applicable, uses PCI auto config
  19 *
  20 * All supported devices share the same PCI device ID and are treated as a
  21 * PCI-6216 with 16 analog output channels.  On a PCI-6208, the upper 8
  22 * channels exist in registers, but don't go to DAC chips.
  23 */
  24
  25#include <linux/module.h>
  26#include <linux/delay.h>
  27
  28#include "../comedi_pci.h"
  29
  30/*
  31 * PCI-6208/6216-GL register map
  32 */
  33#define PCI6208_AO_CONTROL(x)           (0x00 + (2 * (x)))
  34#define PCI6208_AO_STATUS               0x00
  35#define PCI6208_AO_STATUS_DATA_SEND     BIT(0)
  36#define PCI6208_DIO                     0x40
  37#define PCI6208_DIO_DO_MASK             (0x0f)
  38#define PCI6208_DIO_DO_SHIFT            (0)
  39#define PCI6208_DIO_DI_MASK             (0xf0)
  40#define PCI6208_DIO_DI_SHIFT            (4)
  41
  42static int pci6208_ao_eoc(struct comedi_device *dev,
  43                          struct comedi_subdevice *s,
  44                          struct comedi_insn *insn,
  45                          unsigned long context)
  46{
  47        unsigned int status;
  48
  49        status = inw(dev->iobase + PCI6208_AO_STATUS);
  50        if ((status & PCI6208_AO_STATUS_DATA_SEND) == 0)
  51                return 0;
  52        return -EBUSY;
  53}
  54
  55static int pci6208_ao_insn_write(struct comedi_device *dev,
  56                                 struct comedi_subdevice *s,
  57                                 struct comedi_insn *insn,
  58                                 unsigned int *data)
  59{
  60        unsigned int chan = CR_CHAN(insn->chanspec);
  61        int ret;
  62        int i;
  63
  64        for (i = 0; i < insn->n; i++) {
  65                unsigned int val = data[i];
  66
  67                /* D/A transfer rate is 2.2us */
  68                ret = comedi_timeout(dev, s, insn, pci6208_ao_eoc, 0);
  69                if (ret)
  70                        return ret;
  71
  72                /* the hardware expects two's complement values */
  73                outw(comedi_offset_munge(s, val),
  74                     dev->iobase + PCI6208_AO_CONTROL(chan));
  75
  76                s->readback[chan] = val;
  77        }
  78
  79        return insn->n;
  80}
  81
  82static int pci6208_di_insn_bits(struct comedi_device *dev,
  83                                struct comedi_subdevice *s,
  84                                struct comedi_insn *insn,
  85                                unsigned int *data)
  86{
  87        unsigned int val;
  88
  89        val = inw(dev->iobase + PCI6208_DIO);
  90        val = (val & PCI6208_DIO_DI_MASK) >> PCI6208_DIO_DI_SHIFT;
  91
  92        data[1] = val;
  93
  94        return insn->n;
  95}
  96
  97static int pci6208_do_insn_bits(struct comedi_device *dev,
  98                                struct comedi_subdevice *s,
  99                                struct comedi_insn *insn,
 100                                unsigned int *data)
 101{
 102        if (comedi_dio_update_state(s, data))
 103                outw(s->state, dev->iobase + PCI6208_DIO);
 104
 105        data[1] = s->state;
 106
 107        return insn->n;
 108}
 109
 110static int pci6208_auto_attach(struct comedi_device *dev,
 111                               unsigned long context_unused)
 112{
 113        struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 114        struct comedi_subdevice *s;
 115        unsigned int val;
 116        int ret;
 117
 118        ret = comedi_pci_enable(dev);
 119        if (ret)
 120                return ret;
 121        dev->iobase = pci_resource_start(pcidev, 2);
 122
 123        ret = comedi_alloc_subdevices(dev, 3);
 124        if (ret)
 125                return ret;
 126
 127        s = &dev->subdevices[0];
 128        /* analog output subdevice */
 129        s->type         = COMEDI_SUBD_AO;
 130        s->subdev_flags = SDF_WRITABLE;
 131        s->n_chan       = 16;   /* Only 8 usable on PCI-6208 */
 132        s->maxdata      = 0xffff;
 133        s->range_table  = &range_bipolar10;
 134        s->insn_write   = pci6208_ao_insn_write;
 135
 136        ret = comedi_alloc_subdev_readback(s);
 137        if (ret)
 138                return ret;
 139
 140        s = &dev->subdevices[1];
 141        /* digital input subdevice */
 142        s->type         = COMEDI_SUBD_DI;
 143        s->subdev_flags = SDF_READABLE;
 144        s->n_chan       = 4;
 145        s->maxdata      = 1;
 146        s->range_table  = &range_digital;
 147        s->insn_bits    = pci6208_di_insn_bits;
 148
 149        s = &dev->subdevices[2];
 150        /* digital output subdevice */
 151        s->type         = COMEDI_SUBD_DO;
 152        s->subdev_flags = SDF_WRITABLE;
 153        s->n_chan       = 4;
 154        s->maxdata      = 1;
 155        s->range_table  = &range_digital;
 156        s->insn_bits    = pci6208_do_insn_bits;
 157
 158        /*
 159         * Get the read back signals from the digital outputs
 160         * and save it as the initial state for the subdevice.
 161         */
 162        val = inw(dev->iobase + PCI6208_DIO);
 163        val = (val & PCI6208_DIO_DO_MASK) >> PCI6208_DIO_DO_SHIFT;
 164        s->state        = val;
 165
 166        return 0;
 167}
 168
 169static struct comedi_driver adl_pci6208_driver = {
 170        .driver_name    = "adl_pci6208",
 171        .module         = THIS_MODULE,
 172        .auto_attach    = pci6208_auto_attach,
 173        .detach         = comedi_pci_detach,
 174};
 175
 176static int adl_pci6208_pci_probe(struct pci_dev *dev,
 177                                 const struct pci_device_id *id)
 178{
 179        return comedi_pci_auto_config(dev, &adl_pci6208_driver,
 180                                      id->driver_data);
 181}
 182
 183static const struct pci_device_id adl_pci6208_pci_table[] = {
 184        { PCI_DEVICE(PCI_VENDOR_ID_ADLINK, 0x6208) },
 185        { PCI_DEVICE_SUB(PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
 186                         0x9999, 0x6208) },
 187        { 0 }
 188};
 189MODULE_DEVICE_TABLE(pci, adl_pci6208_pci_table);
 190
 191static struct pci_driver adl_pci6208_pci_driver = {
 192        .name           = "adl_pci6208",
 193        .id_table       = adl_pci6208_pci_table,
 194        .probe          = adl_pci6208_pci_probe,
 195        .remove         = comedi_pci_auto_unconfig,
 196};
 197module_comedi_pci_driver(adl_pci6208_driver, adl_pci6208_pci_driver);
 198
 199MODULE_AUTHOR("Comedi https://www.comedi.org");
 200MODULE_DESCRIPTION("Comedi driver for ADLink 6208 series cards");
 201MODULE_LICENSE("GPL");
 202