LXR linux/drivers/staging/comedi/drivers/adv

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * adv_pci1723.c
   4 * Comedi driver for the Advantech PCI-1723 card.
   5 *
   6 * COMEDI - Linux Control and Measurement Device Interface
   7 * Copyright (C) 2000 David A. Schleef <ds@schleef.org>
   8 */
   9
  10/*
  11 * Driver: adv_pci1723
  12 * Description: Advantech PCI-1723
  13 * Author: yonggang <rsmgnu@gmail.com>, Ian Abbott <abbotti@mev.co.uk>
  14 * Devices: [Advantech] PCI-1723 (adv_pci1723)
  15 * Updated: Mon, 14 Apr 2008 15:12:56 +0100
  16 * Status: works
  17 *
  18 * Configuration Options: not applicable, uses comedi PCI auto config
  19 *
  20 * Subdevice 0 is 8-channel AO, 16-bit, range +/- 10 V.
  21 *
  22 * Subdevice 1 is 16-channel DIO.  The channels are configurable as
  23 * input or output in 2 groups (0 to 7, 8 to 15). Configuring any
  24 * channel implicitly configures all channels in the same group.
  25 *
  26 * TODO:
  27 * 1. Add the two milliamp ranges to the AO subdevice (0 to 20 mA,
  28 *    4 to 20 mA).
  29 * 2. Read the initial ranges and values of the AO subdevice at
  30 *    start-up instead of reinitializing them.
  31 * 3. Implement calibration.
  32 */
  33
  34#include <linux/module.h>
  35
  36#include "../comedi_pci.h"
  37
  38/*
  39 * PCI Bar 2 I/O Register map (dev->iobase)
  40 */
  41#define PCI1723_AO_REG(x)               (0x00 + ((x) * 2))
  42#define PCI1723_BOARD_ID_REG            0x10
  43#define PCI1723_BOARD_ID_MASK           (0xf << 0)
  44#define PCI1723_SYNC_CTRL_REG           0x12
  45#define PCI1723_SYNC_CTRL(x)            (((x) & 0x1) << 0)
  46#define PCI1723_SYNC_CTRL_ASYNC         PCI1723_SYNC_CTRL(0)
  47#define PCI1723_SYNC_CTRL_SYNC          PCI1723_SYNC_CTRL(1)
  48#define PCI1723_CTRL_REG                0x14
  49#define PCI1723_CTRL_BUSY               BIT(15)
  50#define PCI1723_CTRL_INIT               BIT(14)
  51#define PCI1723_CTRL_SELF               BIT(8)
  52#define PCI1723_CTRL_IDX(x)             (((x) & 0x3) << 6)
  53#define PCI1723_CTRL_RANGE(x)           (((x) & 0x3) << 4)
  54#define PCI1723_CTRL_SEL(x)             (((x) & 0x1) << 3)
  55#define PCI1723_CTRL_GAIN               PCI1723_CTRL_SEL(0)
  56#define PCI1723_CTRL_OFFSET             PCI1723_CTRL_SEL(1)
  57#define PCI1723_CTRL_CHAN(x)            (((x) & 0x7) << 0)
  58#define PCI1723_CALIB_CTRL_REG          0x16
  59#define PCI1723_CALIB_CTRL_CS           BIT(2)
  60#define PCI1723_CALIB_CTRL_DAT          BIT(1)
  61#define PCI1723_CALIB_CTRL_CLK          BIT(0)
  62#define PCI1723_CALIB_STROBE_REG        0x18
  63#define PCI1723_DIO_CTRL_REG            0x1a
  64#define PCI1723_DIO_CTRL_HDIO           BIT(1)
  65#define PCI1723_DIO_CTRL_LDIO           BIT(0)
  66#define PCI1723_DIO_DATA_REG            0x1c
  67#define PCI1723_CALIB_DATA_REG          0x1e
  68#define PCI1723_SYNC_STROBE_REG         0x20
  69#define PCI1723_RESET_AO_STROBE_REG     0x22
  70#define PCI1723_RESET_CALIB_STROBE_REG  0x24
  71#define PCI1723_RANGE_STROBE_REG        0x26
  72#define PCI1723_VREF_REG                0x28
  73#define PCI1723_VREF(x)                 (((x) & 0x3) << 0)
  74#define PCI1723_VREF_NEG10V             PCI1723_VREF(0)
  75#define PCI1723_VREF_0V                 PCI1723_VREF(1)
  76#define PCI1723_VREF_POS10V             PCI1723_VREF(3)
  77
  78static int pci1723_ao_insn_write(struct comedi_device *dev,
  79                                 struct comedi_subdevice *s,
  80                                 struct comedi_insn *insn,
  81                                 unsigned int *data)
  82{
  83        unsigned int chan = CR_CHAN(insn->chanspec);
  84        int i;
  85
  86        for (i = 0; i < insn->n; i++) {
  87                unsigned int val = data[i];
  88
  89                outw(val, dev->iobase + PCI1723_AO_REG(chan));
  90                s->readback[chan] = val;
  91        }
  92
  93        return insn->n;
  94}
  95
  96static int pci1723_dio_insn_config(struct comedi_device *dev,
  97                                   struct comedi_subdevice *s,
  98                                   struct comedi_insn *insn,
  99                                   unsigned int *data)
 100{
 101        unsigned int chan = CR_CHAN(insn->chanspec);
 102        unsigned int mask = (chan < 8) ? 0x00ff : 0xff00;
 103        unsigned short mode = 0x0000;           /* assume output */
 104        int ret;
 105
 106        ret = comedi_dio_insn_config(dev, s, insn, data, mask);
 107        if (ret)
 108                return ret;
 109
 110        if (!(s->io_bits & 0x00ff))
 111                mode |= PCI1723_DIO_CTRL_LDIO;  /* low byte input */
 112        if (!(s->io_bits & 0xff00))
 113                mode |= PCI1723_DIO_CTRL_HDIO;  /* high byte input */
 114        outw(mode, dev->iobase + PCI1723_DIO_CTRL_REG);
 115
 116        return insn->n;
 117}
 118
 119static int pci1723_dio_insn_bits(struct comedi_device *dev,
 120                                 struct comedi_subdevice *s,
 121                                 struct comedi_insn *insn,
 122                                 unsigned int *data)
 123{
 124        if (comedi_dio_update_state(s, data))
 125                outw(s->state, dev->iobase + PCI1723_DIO_DATA_REG);
 126
 127        data[1] = inw(dev->iobase + PCI1723_DIO_DATA_REG);
 128
 129        return insn->n;
 130}
 131
 132static int pci1723_auto_attach(struct comedi_device *dev,
 133                               unsigned long context_unused)
 134{
 135        struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 136        struct comedi_subdevice *s;
 137        unsigned int val;
 138        int ret;
 139        int i;
 140
 141        ret = comedi_pci_enable(dev);
 142        if (ret)
 143                return ret;
 144        dev->iobase = pci_resource_start(pcidev, 2);
 145
 146        ret = comedi_alloc_subdevices(dev, 2);
 147        if (ret)
 148                return ret;
 149
 150        s = &dev->subdevices[0];
 151        s->type         = COMEDI_SUBD_AO;
 152        s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_COMMON;
 153        s->n_chan       = 8;
 154        s->maxdata      = 0xffff;
 155        s->range_table  = &range_bipolar10;
 156        s->insn_write   = pci1723_ao_insn_write;
 157
 158        ret = comedi_alloc_subdev_readback(s);
 159        if (ret)
 160                return ret;
 161
 162        /* synchronously reset all analog outputs to 0V, +/-10V range */
 163        outw(PCI1723_SYNC_CTRL_SYNC, dev->iobase + PCI1723_SYNC_CTRL_REG);
 164        for (i = 0; i < s->n_chan; i++) {
 165                outw(PCI1723_CTRL_RANGE(0) | PCI1723_CTRL_CHAN(i),
 166                     PCI1723_CTRL_REG);
 167                outw(0, dev->iobase + PCI1723_RANGE_STROBE_REG);
 168
 169                outw(0x8000, dev->iobase + PCI1723_AO_REG(i));
 170                s->readback[i] = 0x8000;
 171        }
 172        outw(0, dev->iobase + PCI1723_SYNC_STROBE_REG);
 173
 174        /* disable syncronous control */
 175        outw(PCI1723_SYNC_CTRL_ASYNC, dev->iobase + PCI1723_SYNC_CTRL_REG);
 176
 177        s = &dev->subdevices[1];
 178        s->type         = COMEDI_SUBD_DIO;
 179        s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
 180        s->n_chan       = 16;
 181        s->maxdata      = 1;
 182        s->range_table  = &range_digital;
 183        s->insn_config  = pci1723_dio_insn_config;
 184        s->insn_bits    = pci1723_dio_insn_bits;
 185
 186        /* get initial DIO direction and state */
 187        val = inw(dev->iobase + PCI1723_DIO_CTRL_REG);
 188        if (!(val & PCI1723_DIO_CTRL_LDIO))
 189                s->io_bits |= 0x00ff;   /* low byte output */
 190        if (!(val & PCI1723_DIO_CTRL_HDIO))
 191                s->io_bits |= 0xff00;   /* high byte output */
 192        s->state = inw(dev->iobase + PCI1723_DIO_DATA_REG);
 193
 194        return 0;
 195}
 196
 197static struct comedi_driver adv_pci1723_driver = {
 198        .driver_name    = "adv_pci1723",
 199        .module         = THIS_MODULE,
 200        .auto_attach    = pci1723_auto_attach,
 201        .detach         = comedi_pci_detach,
 202};
 203
 204static int adv_pci1723_pci_probe(struct pci_dev *dev,
 205                                 const struct pci_device_id *id)
 206{
 207        return comedi_pci_auto_config(dev, &adv_pci1723_driver,
 208                                      id->driver_data);
 209}
 210
 211static const struct pci_device_id adv_pci1723_pci_table[] = {
 212        { PCI_DEVICE(PCI_VENDOR_ID_ADVANTECH, 0x1723) },
 213        { 0 }
 214};
 215MODULE_DEVICE_TABLE(pci, adv_pci1723_pci_table);
 216
 217static struct pci_driver adv_pci1723_pci_driver = {
 218        .name           = "adv_pci1723",
 219        .id_table       = adv_pci1723_pci_table,
 220        .probe          = adv_pci1723_pci_probe,
 221        .remove         = comedi_pci_auto_unconfig,
 222};
 223module_comedi_pci_driver(adv_pci1723_driver, adv_pci1723_pci_driver);
 224
 225MODULE_AUTHOR("Comedi http://www.comedi.org");
 226MODULE_DESCRIPTION("Advantech PCI-1723 Comedi driver");
 227MODULE_LICENSE("GPL");
 228