2 comedi/drivers/ke_counter.c
3 Comedi driver for Kolter-Electronic PCI Counter 1 Card
5 COMEDI - Linux Control and Measurement Device Interface
6 Copyright (C) 2000 David A. Schleef <ds@schleef.org>
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.
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.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 Description: Driver for Kolter Electronic Counter Card
26 Devices: [Kolter Electronic] PCI Counter Card (ke_counter)
27 Author: Michael Hillmann
28 Updated: Mon, 14 Apr 2008 15:42:42 +0100
31 Configuration Options:
32 [0] - PCI bus of device (optional)
33 [1] - PCI slot of device (optional)
34 If bus/slot is not specified, the first supported
35 PCI device found will be used.
37 This driver is a simple driver to read the counter values from
38 Kolter Electronic PCI Counter Card.
41 #include "../comedidev.h"
43 #include "comedi_pci.h"
45 #define CNT_DRIVER_NAME "ke_counter"
46 #define PCI_VENDOR_ID_KOLTER 0x1001
47 #define CNT_CARD_DEVICE_ID 0x0014
49 /*-- function prototypes ----------------------------------------------------*/
51 static int cnt_attach(struct comedi_device *dev, struct comedi_devconfig *it);
52 static int cnt_detach(struct comedi_device *dev);
54 static DEFINE_PCI_DEVICE_TABLE(cnt_pci_table) = {
55 { PCI_DEVICE(PCI_VENDOR_ID_KOLTER, CNT_CARD_DEVICE_ID) },
59 MODULE_DEVICE_TABLE(pci, cnt_pci_table);
61 /*-- board specification structure ------------------------------------------*/
63 struct cnt_board_struct {
71 static const struct cnt_board_struct cnt_boards[] = {
73 .name = CNT_DRIVER_NAME,
74 .device_id = CNT_CARD_DEVICE_ID,
79 #define cnt_board_nbr (sizeof(cnt_boards)/sizeof(struct cnt_board_struct))
81 /*-- device private structure -----------------------------------------------*/
83 struct cnt_device_private {
85 struct pci_dev *pcidev;
88 #define devpriv ((struct cnt_device_private *)dev->private)
90 static struct comedi_driver cnt_driver = {
91 .driver_name = CNT_DRIVER_NAME,
92 .module = THIS_MODULE,
97 static int __devinit cnt_driver_pci_probe(struct pci_dev *dev,
98 const struct pci_device_id *ent)
100 return comedi_pci_auto_config(dev, &cnt_driver);
103 static void __devexit cnt_driver_pci_remove(struct pci_dev *dev)
105 comedi_pci_auto_unconfig(dev);
108 static struct pci_driver cnt_driver_pci_driver = {
109 .id_table = cnt_pci_table,
110 .probe = &cnt_driver_pci_probe,
111 .remove = __devexit_p(&cnt_driver_pci_remove)
114 static int __init cnt_driver_init_module(void)
118 retval = comedi_driver_register(&cnt_driver);
122 cnt_driver_pci_driver.name = (char *)cnt_driver.driver_name;
123 return pci_register_driver(&cnt_driver_pci_driver);
126 static void __exit cnt_driver_cleanup_module(void)
128 pci_unregister_driver(&cnt_driver_pci_driver);
129 comedi_driver_unregister(&cnt_driver);
132 module_init(cnt_driver_init_module);
133 module_exit(cnt_driver_cleanup_module);
135 /*-- counter write ----------------------------------------------------------*/
137 /* This should be used only for resetting the counters; maybe it is better
138 to make a special command 'reset'. */
139 static int cnt_winsn(struct comedi_device *dev,
140 struct comedi_subdevice *s, struct comedi_insn *insn,
143 int chan = CR_CHAN(insn->chanspec);
145 outb((unsigned char)((data[0] >> 24) & 0xff),
146 dev->iobase + chan * 0x20 + 0x10);
147 outb((unsigned char)((data[0] >> 16) & 0xff),
148 dev->iobase + chan * 0x20 + 0x0c);
149 outb((unsigned char)((data[0] >> 8) & 0xff),
150 dev->iobase + chan * 0x20 + 0x08);
151 outb((unsigned char)((data[0] >> 0) & 0xff),
152 dev->iobase + chan * 0x20 + 0x04);
154 /* return the number of samples written */
158 /*-- counter read -----------------------------------------------------------*/
160 static int cnt_rinsn(struct comedi_device *dev,
161 struct comedi_subdevice *s, struct comedi_insn *insn,
164 unsigned char a0, a1, a2, a3, a4;
165 int chan = CR_CHAN(insn->chanspec);
168 a0 = inb(dev->iobase + chan * 0x20);
169 a1 = inb(dev->iobase + chan * 0x20 + 0x04);
170 a2 = inb(dev->iobase + chan * 0x20 + 0x08);
171 a3 = inb(dev->iobase + chan * 0x20 + 0x0c);
172 a4 = inb(dev->iobase + chan * 0x20 + 0x10);
174 result = (a1 + (a2 * 256) + (a3 * 65536));
176 result = result - s->maxdata;
178 *data = (unsigned int)result;
180 /* return the number of samples read */
184 /*-- attach -----------------------------------------------------------------*/
186 static int cnt_attach(struct comedi_device *dev, struct comedi_devconfig *it)
188 struct comedi_subdevice *subdevice;
189 struct pci_dev *pci_device = NULL;
190 struct cnt_board_struct *board;
191 unsigned long io_base;
194 /* allocate device private structure */
195 error = alloc_private(dev, sizeof(struct cnt_device_private));
199 /* Probe the device to determine what device in the series it is. */
200 for_each_pci_dev(pci_device) {
201 if (pci_device->vendor == PCI_VENDOR_ID_KOLTER) {
202 for (i = 0; i < cnt_board_nbr; i++) {
203 if (cnt_boards[i].device_id ==
204 pci_device->device) {
205 /* was a particular bus/slot requested? */
206 if ((it->options[0] != 0)
207 || (it->options[1] != 0)) {
208 /* are we on the wrong bus/slot? */
209 if (pci_device->bus->number !=
212 PCI_SLOT(pci_device->devfn)
218 dev->board_ptr = cnt_boards + i;
220 (struct cnt_board_struct *)
228 "comedi%d: no supported board found! (req. bus/slot: %d/%d)\n",
229 dev->minor, it->options[0], it->options[1]);
234 "comedi%d: found %s at PCI bus %d, slot %d\n", dev->minor,
235 board->name, pci_device->bus->number,
236 PCI_SLOT(pci_device->devfn));
237 devpriv->pcidev = pci_device;
238 dev->board_name = board->name;
240 /* enable PCI device and request regions */
241 error = comedi_pci_enable(pci_device, CNT_DRIVER_NAME);
243 printk(KERN_WARNING "comedi%d: "
244 "failed to enable PCI device and request regions!\n",
249 /* read register base address [PCI_BASE_ADDRESS #0] */
250 io_base = pci_resource_start(pci_device, 0);
251 dev->iobase = io_base;
253 /* allocate the subdevice structures */
254 error = alloc_subdevices(dev, 1);
258 subdevice = dev->subdevices + 0;
259 dev->read_subdev = subdevice;
261 subdevice->type = COMEDI_SUBD_COUNTER;
262 subdevice->subdev_flags = SDF_READABLE /* | SDF_COMMON */ ;
263 subdevice->n_chan = board->cnt_channel_nbr;
264 subdevice->maxdata = (1 << board->cnt_bits) - 1;
265 subdevice->insn_read = cnt_rinsn;
266 subdevice->insn_write = cnt_winsn;
268 /* select 20MHz clock */
269 outb(3, dev->iobase + 248);
271 /* reset all counters */
272 outb(0, dev->iobase);
273 outb(0, dev->iobase + 0x20);
274 outb(0, dev->iobase + 0x40);
276 printk(KERN_INFO "comedi%d: " CNT_DRIVER_NAME " attached.\n",
281 /*-- detach -----------------------------------------------------------------*/
283 static int cnt_detach(struct comedi_device *dev)
285 if (devpriv && devpriv->pcidev) {
287 comedi_pci_disable(devpriv->pcidev);
288 pci_dev_put(devpriv->pcidev);
290 printk(KERN_INFO "comedi%d: " CNT_DRIVER_NAME " remove\n",
295 MODULE_AUTHOR("Comedi http://www.comedi.org");
296 MODULE_DESCRIPTION("Comedi low-level driver");
297 MODULE_LICENSE("GPL");