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]
  23 *          (ADLink) PCI-6216 [adl_pci6216]
  24 * Author: nsyeow <nsyeow@pd.jaring.my>
  25 * Updated: Fri, 30 Jan 2004 14:44:27 +0800
  26 * Status: untested
  27 *
  28 * Configuration Options: not applicable, uses PCI auto config
  29 */
  30
  31#include <linux/module.h>
  32#include <linux/delay.h>
  33#include <linux/pci.h>
  34
  35#include "../comedidev.h"
  36
  37/*
  38 * PCI-6208/6216-GL register map
  39 */
  40#define PCI6208_AO_CONTROL(x)           (0x00 + (2 * (x)))
  41#define PCI6208_AO_STATUS               0x00
  42#define PCI6208_AO_STATUS_DATA_SEND     (1 << 0)
  43#define PCI6208_DIO                     0x40
  44#define PCI6208_DIO_DO_MASK             (0x0f)
  45#define PCI6208_DIO_DO_SHIFT            (0)
  46#define PCI6208_DIO_DI_MASK             (0xf0)
  47#define PCI6208_DIO_DI_SHIFT            (4)
  48
  49enum pci6208_boardid {
  50        BOARD_PCI6208,
  51        BOARD_PCI6216,
  52};
  53
  54struct pci6208_board {
  55        const char *name;
  56        int ao_chans;
  57};
  58
  59static const struct pci6208_board pci6208_boards[] = {
  60        [BOARD_PCI6208] = {
  61                .name           = "adl_pci6208",
  62                .ao_chans       = 8,
  63        },
  64        [BOARD_PCI6216] = {
  65                .name           = "adl_pci6216",
  66                .ao_chans       = 16,
  67        },
  68};
  69
  70static int pci6208_ao_eoc(struct comedi_device *dev,
  71                          struct comedi_subdevice *s,
  72                          struct comedi_insn *insn,
  73                          unsigned long context)
  74{
  75        unsigned int status;
  76
  77        status = inw(dev->iobase + PCI6208_AO_STATUS);
  78        if ((status & PCI6208_AO_STATUS_DATA_SEND) == 0)
  79                return 0;
  80        return -EBUSY;
  81}
  82
  83static int pci6208_ao_insn_write(struct comedi_device *dev,
  84                                 struct comedi_subdevice *s,
  85                                 struct comedi_insn *insn,
  86                                 unsigned int *data)
  87{
  88        unsigned int chan = CR_CHAN(insn->chanspec);
  89        unsigned int val = s->readback[chan];
  90        int ret;
  91        int i;
  92
  93        for (i = 0; i < insn->n; i++) {
  94                val = data[i];
  95
  96                /* D/A transfer rate is 2.2us */
  97                ret = comedi_timeout(dev, s, insn, pci6208_ao_eoc, 0);
  98                if (ret)
  99                        return ret;
 100
 101                /* the hardware expects two's complement values */
 102                outw(comedi_offset_munge(s, val),
 103                     dev->iobase + PCI6208_AO_CONTROL(chan));
 104
 105                s->readback[chan] = val;
 106        }
 107
 108        return insn->n;
 109}
 110
 111static int pci6208_di_insn_bits(struct comedi_device *dev,
 112                                struct comedi_subdevice *s,
 113                                struct comedi_insn *insn,
 114                                unsigned int *data)
 115{
 116        unsigned int val;
 117
 118        val = inw(dev->iobase + PCI6208_DIO);
 119        val = (val & PCI6208_DIO_DI_MASK) >> PCI6208_DIO_DI_SHIFT;
 120
 121        data[1] = val;
 122
 123        return insn->n;
 124}
 125
 126static int pci6208_do_insn_bits(struct comedi_device *dev,
 127                                struct comedi_subdevice *s,
 128                                struct comedi_insn *insn,
 129                                unsigned int *data)
 130{
 131        if (comedi_dio_update_state(s, data))
 132                outw(s->state, dev->iobase + PCI6208_DIO);
 133
 134        data[1] = s->state;
 135
 136        return insn->n;
 137}
 138
 139static int pci6208_auto_attach(struct comedi_device *dev,
 140                               unsigned long context)
 141{
 142        struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 143        const struct pci6208_board *boardinfo = NULL;
 144        struct comedi_subdevice *s;
 145        unsigned int val;
 146        int ret;
 147
 148        if (context < ARRAY_SIZE(pci6208_boards))
 149                boardinfo = &pci6208_boards[context];
 150        if (!boardinfo)
 151                return -ENODEV;
 152        dev->board_ptr = boardinfo;
 153        dev->board_name = boardinfo->name;
 154
 155        ret = comedi_pci_enable(dev);
 156        if (ret)
 157                return ret;
 158        dev->iobase = pci_resource_start(pcidev, 2);
 159
 160        ret = comedi_alloc_subdevices(dev, 3);
 161        if (ret)
 162                return ret;
 163
 164        s = &dev->subdevices[0];
 165        /* analog output subdevice */
 166        s->type         = COMEDI_SUBD_AO;
 167        s->subdev_flags = SDF_WRITABLE;
 168        s->n_chan       = boardinfo->ao_chans;
 169        s->maxdata      = 0xffff;
 170        s->range_table  = &range_bipolar10;
 171        s->insn_write   = pci6208_ao_insn_write;
 172
 173        ret = comedi_alloc_subdev_readback(s);
 174        if (ret)
 175                return ret;
 176
 177        s = &dev->subdevices[1];
 178        /* digital input subdevice */
 179        s->type         = COMEDI_SUBD_DI;
 180        s->subdev_flags = SDF_READABLE;
 181        s->n_chan       = 4;
 182        s->maxdata      = 1;
 183        s->range_table  = &range_digital;
 184        s->insn_bits    = pci6208_di_insn_bits;
 185
 186        s = &dev->subdevices[2];
 187        /* digital output subdevice */
 188        s->type         = COMEDI_SUBD_DO;
 189        s->subdev_flags = SDF_WRITABLE;
 190        s->n_chan       = 4;
 191        s->maxdata      = 1;
 192        s->range_table  = &range_digital;
 193        s->insn_bits    = pci6208_do_insn_bits;
 194
 195        /*
 196         * Get the read back signals from the digital outputs
 197         * and save it as the initial state for the subdevice.
 198         */
 199        val = inw(dev->iobase + PCI6208_DIO);
 200        val = (val & PCI6208_DIO_DO_MASK) >> PCI6208_DIO_DO_SHIFT;
 201        s->state        = val;
 202
 203        return 0;
 204}
 205
 206static struct comedi_driver adl_pci6208_driver = {
 207        .driver_name    = "adl_pci6208",
 208        .module         = THIS_MODULE,
 209        .auto_attach    = pci6208_auto_attach,
 210        .detach         = comedi_pci_detach,
 211};
 212
 213static int adl_pci6208_pci_probe(struct pci_dev *dev,
 214                                 const struct pci_device_id *id)
 215{
 216        return comedi_pci_auto_config(dev, &adl_pci6208_driver,
 217                                      id->driver_data);
 218}
 219
 220static const struct pci_device_id adl_pci6208_pci_table[] = {
 221        { PCI_VDEVICE(ADLINK, 0x6208), BOARD_PCI6208 },
 222        { PCI_VDEVICE(ADLINK, 0x6216), BOARD_PCI6216 },
 223        { 0 }
 224};
 225MODULE_DEVICE_TABLE(pci, adl_pci6208_pci_table);
 226
 227static struct pci_driver adl_pci6208_pci_driver = {
 228        .name           = "adl_pci6208",
 229        .id_table       = adl_pci6208_pci_table,
 230        .probe          = adl_pci6208_pci_probe,
 231        .remove         = comedi_pci_auto_unconfig,
 232};
 233module_comedi_pci_driver(adl_pci6208_driver, adl_pci6208_pci_driver);
 234
 235MODULE_AUTHOR("Comedi http://www.comedi.org");
 236MODULE_DESCRIPTION("Comedi driver for ADLink 6208 series cards");
 237MODULE_LICENSE("GPL");
 238
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