linux/drivers/staging/comedi/drivers/ke_counter.c
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   1/*
   2 * ke_counter.c
   3 * Comedi driver for Kolter-Electronic PCI Counter 1 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: ke_counter
  21 * Description: Driver for Kolter Electronic Counter Card
  22 * Devices: (Kolter Electronic) PCI Counter Card [ke_counter]
  23 * Author: Michael Hillmann
  24 * Updated: Mon, 14 Apr 2008 15:42:42 +0100
  25 * Status: tested
  26 *
  27 * Configuration Options: not applicable, uses PCI auto config
  28 */
  29
  30#include <linux/module.h>
  31#include <linux/pci.h>
  32
  33#include "../comedidev.h"
  34
  35/*
  36 * PCI BAR 0 Register I/O map
  37 */
  38#define KE_RESET_REG(x)                 (0x00 + ((x) * 0x20))
  39#define KE_LATCH_REG(x)                 (0x00 + ((x) * 0x20))
  40#define KE_LSB_REG(x)                   (0x04 + ((x) * 0x20))
  41#define KE_MID_REG(x)                   (0x08 + ((x) * 0x20))
  42#define KE_MSB_REG(x)                   (0x0c + ((x) * 0x20))
  43#define KE_SIGN_REG(x)                  (0x10 + ((x) * 0x20))
  44#define KE_OSC_SEL_REG                  0xf8
  45#define KE_OSC_SEL_EXT                  (1 << 0)
  46#define KE_OSC_SEL_4MHZ                 (2 << 0)
  47#define KE_OSC_SEL_20MHZ                (3 << 0)
  48#define KE_DO_REG                       0xfc
  49
  50static int ke_counter_insn_write(struct comedi_device *dev,
  51                                 struct comedi_subdevice *s,
  52                                 struct comedi_insn *insn,
  53                                 unsigned int *data)
  54{
  55        unsigned int chan = CR_CHAN(insn->chanspec);
  56        unsigned int val;
  57        int i;
  58
  59        for (i = 0; i < insn->n; i++) {
  60                val = data[0];
  61
  62                /* Order matters */
  63                outb((val >> 24) & 0xff, dev->iobase + KE_SIGN_REG(chan));
  64                outb((val >> 16) & 0xff, dev->iobase + KE_MSB_REG(chan));
  65                outb((val >> 8) & 0xff, dev->iobase + KE_MID_REG(chan));
  66                outb((val >> 0) & 0xff, dev->iobase + KE_LSB_REG(chan));
  67        }
  68
  69        return insn->n;
  70}
  71
  72static int ke_counter_insn_read(struct comedi_device *dev,
  73                                struct comedi_subdevice *s,
  74                                struct comedi_insn *insn,
  75                                unsigned int *data)
  76{
  77        unsigned int chan = CR_CHAN(insn->chanspec);
  78        unsigned int val;
  79        int i;
  80
  81        for (i = 0; i < insn->n; i++) {
  82                /* Order matters */
  83                inb(dev->iobase + KE_LATCH_REG(chan));
  84
  85                val = inb(dev->iobase + KE_LSB_REG(chan));
  86                val |= (inb(dev->iobase + KE_MID_REG(chan)) << 8);
  87                val |= (inb(dev->iobase + KE_MSB_REG(chan)) << 16);
  88                val |= (inb(dev->iobase + KE_SIGN_REG(chan)) << 24);
  89
  90                data[i] = val;
  91        }
  92
  93        return insn->n;
  94}
  95
  96static void ke_counter_reset(struct comedi_device *dev)
  97{
  98        unsigned int chan;
  99
 100        for (chan = 0; chan < 3; chan++)
 101                outb(0, dev->iobase + KE_RESET_REG(chan));
 102}
 103
 104static int ke_counter_insn_config(struct comedi_device *dev,
 105                                  struct comedi_subdevice *s,
 106                                  struct comedi_insn *insn,
 107                                  unsigned int *data)
 108{
 109        unsigned char src;
 110
 111        switch (data[0]) {
 112        case INSN_CONFIG_SET_CLOCK_SRC:
 113                switch (data[1]) {
 114                case KE_CLK_20MHZ:      /* default */
 115                        src = KE_OSC_SEL_20MHZ;
 116                        break;
 117                case KE_CLK_4MHZ:       /* option */
 118                        src = KE_OSC_SEL_4MHZ;
 119                        break;
 120                case KE_CLK_EXT:        /* Pin 21 on D-sub */
 121                        src = KE_OSC_SEL_EXT;
 122                        break;
 123                default:
 124                        return -EINVAL;
 125                }
 126                outb(src, dev->iobase + KE_OSC_SEL_REG);
 127                break;
 128        case INSN_CONFIG_GET_CLOCK_SRC:
 129                src = inb(dev->iobase + KE_OSC_SEL_REG);
 130                switch (src) {
 131                case KE_OSC_SEL_20MHZ:
 132                        data[1] = KE_CLK_20MHZ;
 133                        data[2] = 50;   /* 50ns */
 134                        break;
 135                case KE_OSC_SEL_4MHZ:
 136                        data[1] = KE_CLK_4MHZ;
 137                        data[2] = 250;  /* 250ns */
 138                        break;
 139                case KE_OSC_SEL_EXT:
 140                        data[1] = KE_CLK_EXT;
 141                        data[2] = 0;    /* Unknown */
 142                        break;
 143                default:
 144                        return -EINVAL;
 145                }
 146                break;
 147        case INSN_CONFIG_RESET:
 148                ke_counter_reset(dev);
 149                break;
 150        default:
 151                return -EINVAL;
 152        }
 153
 154        return insn->n;
 155}
 156
 157static int ke_counter_do_insn_bits(struct comedi_device *dev,
 158                                   struct comedi_subdevice *s,
 159                                   struct comedi_insn *insn,
 160                                   unsigned int *data)
 161{
 162        if (comedi_dio_update_state(s, data))
 163                outb(s->state, dev->iobase + KE_DO_REG);
 164
 165        data[1] = s->state;
 166
 167        return insn->n;
 168}
 169
 170static int ke_counter_auto_attach(struct comedi_device *dev,
 171                                  unsigned long context_unused)
 172{
 173        struct pci_dev *pcidev = comedi_to_pci_dev(dev);
 174        struct comedi_subdevice *s;
 175        int ret;
 176
 177        ret = comedi_pci_enable(dev);
 178        if (ret)
 179                return ret;
 180        dev->iobase = pci_resource_start(pcidev, 0);
 181
 182        ret = comedi_alloc_subdevices(dev, 2);
 183        if (ret)
 184                return ret;
 185
 186        s = &dev->subdevices[0];
 187        s->type         = COMEDI_SUBD_COUNTER;
 188        s->subdev_flags = SDF_READABLE;
 189        s->n_chan       = 3;
 190        s->maxdata      = 0x01ffffff;
 191        s->range_table  = &range_unknown;
 192        s->insn_read    = ke_counter_insn_read;
 193        s->insn_write   = ke_counter_insn_write;
 194        s->insn_config  = ke_counter_insn_config;
 195
 196        s = &dev->subdevices[1];
 197        s->type         = COMEDI_SUBD_DO;
 198        s->subdev_flags = SDF_WRITABLE;
 199        s->n_chan       = 3;
 200        s->maxdata      = 1;
 201        s->range_table  = &range_digital;
 202        s->insn_bits    = ke_counter_do_insn_bits;
 203
 204        outb(KE_OSC_SEL_20MHZ, dev->iobase + KE_OSC_SEL_REG);
 205
 206        ke_counter_reset(dev);
 207
 208        return 0;
 209}
 210
 211static struct comedi_driver ke_counter_driver = {
 212        .driver_name    = "ke_counter",
 213        .module         = THIS_MODULE,
 214        .auto_attach    = ke_counter_auto_attach,
 215        .detach         = comedi_pci_detach,
 216};
 217
 218static int ke_counter_pci_probe(struct pci_dev *dev,
 219                                const struct pci_device_id *id)
 220{
 221        return comedi_pci_auto_config(dev, &ke_counter_driver,
 222                                      id->driver_data);
 223}
 224
 225static const struct pci_device_id ke_counter_pci_table[] = {
 226        { PCI_DEVICE(PCI_VENDOR_ID_KOLTER, 0x0014) },
 227        { 0 }
 228};
 229MODULE_DEVICE_TABLE(pci, ke_counter_pci_table);
 230
 231static struct pci_driver ke_counter_pci_driver = {
 232        .name           = "ke_counter",
 233        .id_table       = ke_counter_pci_table,
 234        .probe          = ke_counter_pci_probe,
 235        .remove         = comedi_pci_auto_unconfig,
 236};
 237module_comedi_pci_driver(ke_counter_driver, ke_counter_pci_driver);
 238
 239MODULE_AUTHOR("Comedi http://www.comedi.org");
 240MODULE_DESCRIPTION("Comedi driver for Kolter Electronic Counter Card");
 241MODULE_LICENSE("GPL");
 242
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