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comedi/drivers/ke_counter.c
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Comedi driver for Kolter-Electronic PCI Counter 1 Card
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COMEDI - Linux Control and Measurement Device Interface
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Copyright (C) 2000 David A. Schleef <ds@schleef.org>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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Description: Driver for Kolter Electronic Counter Card
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Devices: [Kolter Electronic] PCI Counter Card (ke_counter)
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Author: Michael Hillmann
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Updated: Mon, 14 Apr 2008 15:42:42 +0100
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Configuration Options:
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[0] - PCI bus of device (optional)
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[1] - PCI slot of device (optional)
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If bus/slot is not specified, the first supported
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PCI device found will be used.
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This driver is a simple driver to read the counter values from
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Kolter Electronic PCI Counter Card.
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#include "../comedidev.h"
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#include "comedi_pci.h"
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#define CNT_DRIVER_NAME "ke_counter"
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#define PCI_VENDOR_ID_KOLTER 0x1001
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#define CNT_CARD_DEVICE_ID 0x0014
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/*-- function prototypes ----------------------------------------------------*/
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static int cnt_attach(struct comedi_device *dev, struct comedi_devconfig *it);
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static int cnt_detach(struct comedi_device *dev);
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static DEFINE_PCI_DEVICE_TABLE(cnt_pci_table) = {
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PCI_VENDOR_ID_KOLTER, CNT_CARD_DEVICE_ID, PCI_ANY_ID,
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PCI_ANY_ID, 0, 0, 0}, {
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MODULE_DEVICE_TABLE(pci, cnt_pci_table);
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/*-- board specification structure ------------------------------------------*/
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struct cnt_board_struct {
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static const struct cnt_board_struct cnt_boards[] = {
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.name = CNT_DRIVER_NAME,
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.device_id = CNT_CARD_DEVICE_ID,
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#define cnt_board_nbr (sizeof(cnt_boards)/sizeof(struct cnt_board_struct))
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/*-- device private structure -----------------------------------------------*/
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struct cnt_device_private {
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struct pci_dev *pcidev;
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#define devpriv ((struct cnt_device_private *)dev->private)
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static struct comedi_driver cnt_driver = {
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.driver_name = CNT_DRIVER_NAME,
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.module = THIS_MODULE,
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static int __devinit cnt_driver_pci_probe(struct pci_dev *dev,
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const struct pci_device_id *ent)
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return comedi_pci_auto_config(dev, cnt_driver.driver_name);
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static void __devexit cnt_driver_pci_remove(struct pci_dev *dev)
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comedi_pci_auto_unconfig(dev);
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static struct pci_driver cnt_driver_pci_driver = {
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.id_table = cnt_pci_table,
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.probe = &cnt_driver_pci_probe,
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.remove = __devexit_p(&cnt_driver_pci_remove)
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static int __init cnt_driver_init_module(void)
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retval = comedi_driver_register(&cnt_driver);
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cnt_driver_pci_driver.name = (char *)cnt_driver.driver_name;
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return pci_register_driver(&cnt_driver_pci_driver);
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static void __exit cnt_driver_cleanup_module(void)
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pci_unregister_driver(&cnt_driver_pci_driver);
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comedi_driver_unregister(&cnt_driver);
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module_init(cnt_driver_init_module);
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module_exit(cnt_driver_cleanup_module);
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/*-- counter write ----------------------------------------------------------*/
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/* This should be used only for resetting the counters; maybe it is better
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to make a special command 'reset'. */
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static int cnt_winsn(struct comedi_device *dev,
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struct comedi_subdevice *s, struct comedi_insn *insn,
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int chan = CR_CHAN(insn->chanspec);
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outb((unsigned char)((data[0] >> 24) & 0xff),
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dev->iobase + chan * 0x20 + 0x10);
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outb((unsigned char)((data[0] >> 16) & 0xff),
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dev->iobase + chan * 0x20 + 0x0c);
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outb((unsigned char)((data[0] >> 8) & 0xff),
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dev->iobase + chan * 0x20 + 0x08);
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outb((unsigned char)((data[0] >> 0) & 0xff),
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dev->iobase + chan * 0x20 + 0x04);
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/* return the number of samples written */
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/*-- counter read -----------------------------------------------------------*/
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static int cnt_rinsn(struct comedi_device *dev,
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struct comedi_subdevice *s, struct comedi_insn *insn,
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unsigned char a0, a1, a2, a3, a4;
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int chan = CR_CHAN(insn->chanspec);
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a0 = inb(dev->iobase + chan * 0x20);
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a1 = inb(dev->iobase + chan * 0x20 + 0x04);
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a2 = inb(dev->iobase + chan * 0x20 + 0x08);
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a3 = inb(dev->iobase + chan * 0x20 + 0x0c);
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a4 = inb(dev->iobase + chan * 0x20 + 0x10);
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result = (a1 + (a2 * 256) + (a3 * 65536));
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result = result - s->maxdata;
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*data = (unsigned int)result;
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/* return the number of samples read */
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/*-- attach -----------------------------------------------------------------*/
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static int cnt_attach(struct comedi_device *dev, struct comedi_devconfig *it)
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struct comedi_subdevice *subdevice;
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struct pci_dev *pci_device = NULL;
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struct cnt_board_struct *board;
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unsigned long io_base;
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/* allocate device private structure */
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error = alloc_private(dev, sizeof(struct cnt_device_private));
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/* Probe the device to determine what device in the series it is. */
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for_each_pci_dev(pci_device) {
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if (pci_device->vendor == PCI_VENDOR_ID_KOLTER) {
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for (i = 0; i < cnt_board_nbr; i++) {
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if (cnt_boards[i].device_id ==
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pci_device->device) {
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/* was a particular bus/slot requested? */
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if ((it->options[0] != 0)
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|| (it->options[1] != 0)) {
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/* are we on the wrong bus/slot? */
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if (pci_device->bus->number !=
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PCI_SLOT(pci_device->devfn)
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dev->board_ptr = cnt_boards + i;
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(struct cnt_board_struct *)
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"comedi%d: no supported board found! (req. bus/slot: %d/%d)\n",
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dev->minor, it->options[0], it->options[1]);
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"comedi%d: found %s at PCI bus %d, slot %d\n", dev->minor,
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board->name, pci_device->bus->number,
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PCI_SLOT(pci_device->devfn));
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devpriv->pcidev = pci_device;
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dev->board_name = board->name;
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/* enable PCI device and request regions */
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error = comedi_pci_enable(pci_device, CNT_DRIVER_NAME);
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printk(KERN_WARNING "comedi%d: "
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"failed to enable PCI device and request regions!\n",
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/* read register base address [PCI_BASE_ADDRESS #0] */
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io_base = pci_resource_start(pci_device, 0);
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dev->iobase = io_base;
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/* allocate the subdevice structures */
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error = alloc_subdevices(dev, 1);
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subdevice = dev->subdevices + 0;
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dev->read_subdev = subdevice;
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subdevice->type = COMEDI_SUBD_COUNTER;
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subdevice->subdev_flags = SDF_READABLE /* | SDF_COMMON */ ;
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subdevice->n_chan = board->cnt_channel_nbr;
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subdevice->maxdata = (1 << board->cnt_bits) - 1;
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subdevice->insn_read = cnt_rinsn;
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subdevice->insn_write = cnt_winsn;
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/* select 20MHz clock */
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outb(3, dev->iobase + 248);
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/* reset all counters */
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outb(0, dev->iobase);
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outb(0, dev->iobase + 0x20);
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outb(0, dev->iobase + 0x40);
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printk(KERN_INFO "comedi%d: " CNT_DRIVER_NAME " attached.\n",
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/*-- detach -----------------------------------------------------------------*/
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static int cnt_detach(struct comedi_device *dev)
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if (devpriv && devpriv->pcidev) {
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comedi_pci_disable(devpriv->pcidev);
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pci_dev_put(devpriv->pcidev);
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printk(KERN_INFO "comedi%d: " CNT_DRIVER_NAME " remove\n",
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MODULE_AUTHOR("Comedi http://www.comedi.org");
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MODULE_DESCRIPTION("Comedi low-level driver");
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MODULE_LICENSE("GPL");