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

   1/*
   2 * adv_pci1723.c
   3 * Comedi driver for the Advantech PCI-1723 card.
   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: adv_pci1723
  21 * Description: Advantech PCI-1723
  22 * Author: yonggang <rsmgnu@gmail.com>, Ian Abbott <abbotti@mev.co.uk>
  23 * Devices: [Advantech] PCI-1723 (adv_pci1723)
  24 * Updated: Mon, 14 Apr 2008 15:12:56 +0100
  25 * Status: works
  26 *
  27 * Configuration Options: not applicable, uses comedi PCI auto config
  28 *
  29 * Subdevice 0 is 8-channel AO, 16-bit, range +/- 10 V.
  30 *
  31 * Subdevice 1 is 16-channel DIO.  The channels are configurable as
  32 * input or output in 2 groups (0 to 7, 8 to 15). Configuring any
  33 * channel implicitly configures all channels in the same group.
  34 *
  35 * TODO:
  36 * 1. Add the two milliamp ranges to the AO subdevice (0 to 20 mA,
  37 *    4 to 20 mA).
  38 * 2. Read the initial ranges and values of the AO subdevice at
  39 *    start-up instead of reinitializing them.
  40 * 3. Implement calibration.
  41 */
  42
  43#include <linux/module.h>
  44
  45#include "../comedi_pci.h"
  46
  47/*
  48 * PCI Bar 2 I/O Register map (dev->iobase)
  49 */
  50#define PCI1723_AO_REG(x)               (0x00 + ((x) * 2))
  51#define PCI1723_BOARD_ID_REG            0x10
  52#define PCI1723_BOARD_ID_MASK           (0xf << 0)
  53#define PCI1723_SYNC_CTRL_REG           0x12
  54#define PCI1723_SYNC_CTRL(x)            (((x) & 0x1) << 0)
  55#define PCI1723_SYNC_CTRL_ASYNC         PCI1723_SYNC_CTRL(0)
  56#define PCI1723_SYNC_CTRL_SYNC          PCI1723_SYNC_CTRL(1)
  57#define PCI1723_CTRL_REG                0x14
  58#define PCI1723_CTRL_BUSY               BIT(15)
  59#define PCI1723_CTRL_INIT               BIT(14)
  60#define PCI1723_CTRL_SELF               BIT(8)
  61#define PCI1723_CTRL_IDX(x)             (((x) & 0x3) << 6)
  62#define PCI1723_CTRL_RANGE(x)           (((x) & 0x3) << 4)
  63#define PCI1723_CTRL_SEL(x)             (((x) & 0x1) << 3)
  64#define PCI1723_CTRL_GAIN               PCI1723_CTRL_SEL(0)
  65#define PCI1723_CTRL_OFFSET             PCI1723_CTRL_SEL(1)
  66#define PCI1723_CTRL_CHAN(x)            (((x) & 0x7) << 0)
  67#define PCI1723_CALIB_CTRL_REG          0x16
  68#define PCI1723_CALIB_CTRL_CS           BIT(2)
  69#define PCI1723_CALIB_CTRL_DAT          BIT(1)
  70#define PCI1723_CALIB_CTRL_CLK          BIT(0)
  71#define PCI1723_CALIB_STROBE_REG        0x18
  72#define PCI1723_DIO_CTRL_REG            0x1a
  73#define PCI1723_DIO_CTRL_HDIO           BIT(1)
  74#define PCI1723_DIO_CTRL_LDIO           BIT(0)
  75#define PCI1723_DIO_DATA_REG            0x1c
  76#define PCI1723_CALIB_DATA_REG          0x1e
  77#define PCI1723_SYNC_STROBE_REG         0x20
  78#define PCI1723_RESET_AO_STROBE_REG     0x22
  79#define PCI1723_RESET_CALIB_STROBE_REG  0x24
  80#define PCI1723_RANGE_STROBE_REG        0x26
  81#define PCI1723_VREF_REG                0x28
  82#define PCI1723_VREF(x)                 (((x) & 0x3) << 0)
  83#define PCI1723_VREF_NEG10V             PCI1723_VREF(0)
  84#define PCI1723_VREF_0V                 PCI1723_VREF(1)
  85#define PCI1723_VREF_POS10V             PCI1723_VREF(3)
  86
  87static int pci1723_ao_insn_write(struct comedi_device *dev,
  88                                 struct comedi_subdevice *s,
  89                                 struct comedi_insn *insn,
  90                                 unsigned int *data)
  91{
  92        unsigned int chan = CR_CHAN(insn->chanspec);
  93        int i;
  94
  95        for (i = 0; i < insn->n; i++) {
  96                unsigned int val = data[i];
  97
  98                outw(val, dev->iobase + PCI1723_AO_REG(chan));
  99                s->readback[chan] = val;
 100        }
 101
 102        return insn->n;
 103}
 104
 105static int pci1723_dio_insn_config(struct comedi_device *dev,
 106                                   struct comedi_subdevice *s,
 107                                   struct comedi_insn *insn,
 108                                   unsigned int *data)
 109{
 110        unsigned int chan = CR_CHAN(insn->chanspec);
 111        unsigned int mask = (chan < 8) ? 0x00ff : 0xff00;
 112        unsigned short mode = 0x0000;           /* assume output */
 113        int ret;
 114
 115        ret = comedi_dio_insn_config(dev, s, insn, data, mask);
 116        if (ret)
 117                return ret;
 118
 119        if (!(s->io_bits & 0x00ff))
 120                mode |= PCI1723_DIO_CTRL_LDIO;  /* low byte input */
 121        if (!(s->io_bits & 0xff00))
 122                mode |= PCI1723_DIO_CTRL_HDIO;  /* high byte input */
 123        outw(mode, dev->iobase + PCI1723_DIO_CTRL_REG);
 124
 125        return insn->n;
 126}
 127
 128static int pci1723_dio_insn_bits(struct comedi_device *dev,
 129                                 struct comedi_subdevice *s,
 130                                 struct comedi_insn *insn,
 131                                 unsigned int *data)
 132{
 133        if (comedi_dio_update_state(s, data))
 134                outw(s->state, dev->iobase + PCI1723_DIO_DATA_REG);
 135
 136        data[1] = inw(dev->iobase + PCI1723_DIO_DATA_REG);
 137
 138        return insn->n;
 139}
 140
 141static int pci1723_auto_attach(struct comedi_device *dev,
 142                               unsigned long context_unused)
 143{
 144        struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 145        struct comedi_subdevice *s;
 146        unsigned int val;
 147        int ret;
 148        int i;
 149
 150        ret = comedi_pci_enable(dev);
 151        if (ret)
 152                return ret;
 153        dev->iobase = pci_resource_start(pcidev, 2);
 154
 155        ret = comedi_alloc_subdevices(dev, 2);
 156        if (ret)
 157                return ret;
 158
 159        s = &dev->subdevices[0];
 160        s->type         = COMEDI_SUBD_AO;
 161        s->subdev_flags = SDF_WRITABLE | SDF_GROUND | SDF_COMMON;
 162        s->n_chan       = 8;
 163        s->maxdata      = 0xffff;
 164        s->range_table  = &range_bipolar10;
 165        s->insn_write   = pci1723_ao_insn_write;
 166
 167        ret = comedi_alloc_subdev_readback(s);
 168        if (ret)
 169                return ret;
 170
 171        /* synchronously reset all analog outputs to 0V, +/-10V range */
 172        outw(PCI1723_SYNC_CTRL_SYNC, dev->iobase + PCI1723_SYNC_CTRL_REG);
 173        for (i = 0; i < s->n_chan; i++) {
 174                outw(PCI1723_CTRL_RANGE(0) | PCI1723_CTRL_CHAN(i),
 175                     PCI1723_CTRL_REG);
 176                outw(0, dev->iobase + PCI1723_RANGE_STROBE_REG);
 177
 178                outw(0x8000, dev->iobase + PCI1723_AO_REG(i));
 179                s->readback[i] = 0x8000;
 180        }
 181        outw(0, dev->iobase + PCI1723_SYNC_STROBE_REG);
 182
 183        /* disable syncronous control */
 184        outw(PCI1723_SYNC_CTRL_ASYNC, dev->iobase + PCI1723_SYNC_CTRL_REG);
 185
 186        s = &dev->subdevices[1];
 187        s->type         = COMEDI_SUBD_DIO;
 188        s->subdev_flags = SDF_READABLE | SDF_WRITABLE;
 189        s->n_chan       = 16;
 190        s->maxdata      = 1;
 191        s->range_table  = &range_digital;
 192        s->insn_config  = pci1723_dio_insn_config;
 193        s->insn_bits    = pci1723_dio_insn_bits;
 194
 195        /* get initial DIO direction and state */
 196        val = inw(dev->iobase + PCI1723_DIO_CTRL_REG);
 197        if (!(val & PCI1723_DIO_CTRL_LDIO))
 198                s->io_bits |= 0x00ff;   /* low byte output */
 199        if (!(val & PCI1723_DIO_CTRL_HDIO))
 200                s->io_bits |= 0xff00;   /* high byte output */
 201        s->state = inw(dev->iobase + PCI1723_DIO_DATA_REG);
 202
 203        return 0;
 204}
 205
 206static struct comedi_driver adv_pci1723_driver = {
 207        .driver_name    = "adv_pci1723",
 208        .module         = THIS_MODULE,
 209        .auto_attach    = pci1723_auto_attach,
 210        .detach         = comedi_pci_detach,
 211};
 212
 213static int adv_pci1723_pci_probe(struct pci_dev *dev,
 214                                 const struct pci_device_id *id)
 215{
 216        return comedi_pci_auto_config(dev, &adv_pci1723_driver,
 217                                      id->driver_data);
 218}
 219
 220static const struct pci_device_id adv_pci1723_pci_table[] = {
 221        { PCI_DEVICE(PCI_VENDOR_ID_ADVANTECH, 0x1723) },
 222        { 0 }
 223};
 224MODULE_DEVICE_TABLE(pci, adv_pci1723_pci_table);
 225
 226static struct pci_driver adv_pci1723_pci_driver = {
 227        .name           = "adv_pci1723",
 228        .id_table       = adv_pci1723_pci_table,
 229        .probe          = adv_pci1723_pci_probe,
 230        .remove         = comedi_pci_auto_unconfig,
 231};
 232module_comedi_pci_driver(adv_pci1723_driver, adv_pci1723_pci_driver);
 233
 234MODULE_AUTHOR("Comedi http://www.comedi.org");
 235MODULE_DESCRIPTION("Advantech PCI-1723 Comedi driver");
 236MODULE_LICENSE("GPL");
 237