| /* |
| comedi/drivers/ke_counter.c |
| Comedi driver for Kolter-Electronic PCI Counter 1 Card |
| |
| COMEDI - Linux Control and Measurement Device Interface |
| Copyright (C) 2000 David A. Schleef <ds@schleef.org> |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| */ |
| /* |
| Driver: ke_counter |
| Description: Driver for Kolter Electronic Counter Card |
| Devices: [Kolter Electronic] PCI Counter Card (ke_counter) |
| Author: Michael Hillmann |
| Updated: Mon, 14 Apr 2008 15:42:42 +0100 |
| Status: tested |
| |
| Configuration Options: not applicable, uses PCI auto config |
| |
| This driver is a simple driver to read the counter values from |
| Kolter Electronic PCI Counter Card. |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/pci.h> |
| |
| #include "../comedidev.h" |
| |
| #define CNT_CARD_DEVICE_ID 0x0014 |
| |
| /*-- counter write ----------------------------------------------------------*/ |
| |
| /* This should be used only for resetting the counters; maybe it is better |
| to make a special command 'reset'. */ |
| static int cnt_winsn(struct comedi_device *dev, |
| struct comedi_subdevice *s, struct comedi_insn *insn, |
| unsigned int *data) |
| { |
| int chan = CR_CHAN(insn->chanspec); |
| |
| outb((unsigned char)((data[0] >> 24) & 0xff), |
| dev->iobase + chan * 0x20 + 0x10); |
| outb((unsigned char)((data[0] >> 16) & 0xff), |
| dev->iobase + chan * 0x20 + 0x0c); |
| outb((unsigned char)((data[0] >> 8) & 0xff), |
| dev->iobase + chan * 0x20 + 0x08); |
| outb((unsigned char)((data[0] >> 0) & 0xff), |
| dev->iobase + chan * 0x20 + 0x04); |
| |
| /* return the number of samples written */ |
| return 1; |
| } |
| |
| /*-- counter read -----------------------------------------------------------*/ |
| |
| static int cnt_rinsn(struct comedi_device *dev, |
| struct comedi_subdevice *s, struct comedi_insn *insn, |
| unsigned int *data) |
| { |
| unsigned char a0, a1, a2, a3, a4; |
| int chan = CR_CHAN(insn->chanspec); |
| int result; |
| |
| a0 = inb(dev->iobase + chan * 0x20); |
| a1 = inb(dev->iobase + chan * 0x20 + 0x04); |
| a2 = inb(dev->iobase + chan * 0x20 + 0x08); |
| a3 = inb(dev->iobase + chan * 0x20 + 0x0c); |
| a4 = inb(dev->iobase + chan * 0x20 + 0x10); |
| |
| result = (a1 + (a2 * 256) + (a3 * 65536)); |
| if (a4 > 0) |
| result = result - s->maxdata; |
| |
| *data = (unsigned int)result; |
| |
| /* return the number of samples read */ |
| return 1; |
| } |
| |
| static int cnt_auto_attach(struct comedi_device *dev, |
| unsigned long context_unused) |
| { |
| struct pci_dev *pcidev = comedi_to_pci_dev(dev); |
| struct comedi_subdevice *s; |
| int ret; |
| |
| ret = comedi_pci_enable(dev); |
| if (ret) |
| return ret; |
| dev->iobase = pci_resource_start(pcidev, 0); |
| |
| ret = comedi_alloc_subdevices(dev, 1); |
| if (ret) |
| return ret; |
| |
| s = &dev->subdevices[0]; |
| dev->read_subdev = s; |
| |
| s->type = COMEDI_SUBD_COUNTER; |
| s->subdev_flags = SDF_READABLE /* | SDF_COMMON */ ; |
| s->n_chan = 3; |
| s->maxdata = 0x00ffffff; |
| s->insn_read = cnt_rinsn; |
| s->insn_write = cnt_winsn; |
| |
| /* select 20MHz clock */ |
| outb(3, dev->iobase + 248); |
| |
| /* reset all counters */ |
| outb(0, dev->iobase); |
| outb(0, dev->iobase + 0x20); |
| outb(0, dev->iobase + 0x40); |
| |
| dev_info(dev->class_dev, "%s: %s attached\n", |
| dev->driver->driver_name, dev->board_name); |
| |
| return 0; |
| } |
| |
| static struct comedi_driver ke_counter_driver = { |
| .driver_name = "ke_counter", |
| .module = THIS_MODULE, |
| .auto_attach = cnt_auto_attach, |
| .detach = comedi_pci_disable, |
| }; |
| |
| static int ke_counter_pci_probe(struct pci_dev *dev, |
| const struct pci_device_id *id) |
| { |
| return comedi_pci_auto_config(dev, &ke_counter_driver, |
| id->driver_data); |
| } |
| |
| static const struct pci_device_id ke_counter_pci_table[] = { |
| { PCI_DEVICE(PCI_VENDOR_ID_KOLTER, CNT_CARD_DEVICE_ID) }, |
| { 0 } |
| }; |
| MODULE_DEVICE_TABLE(pci, ke_counter_pci_table); |
| |
| static struct pci_driver ke_counter_pci_driver = { |
| .name = "ke_counter", |
| .id_table = ke_counter_pci_table, |
| .probe = ke_counter_pci_probe, |
| .remove = comedi_pci_auto_unconfig, |
| }; |
| module_comedi_pci_driver(ke_counter_driver, ke_counter_pci_driver); |
| |
| MODULE_AUTHOR("Comedi http://www.comedi.org"); |
| MODULE_DESCRIPTION("Comedi low-level driver"); |
| MODULE_LICENSE("GPL"); |