ke_counter.c revision 2e2269f90f2bb4e9438849f0690daba5cba29fc5 
1/*
2    comedi/drivers/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    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.
21
22*/
23/*
24Driver: ke_counter
25Description: Driver for Kolter Electronic Counter Card
26Devices: [Kolter Electronic] PCI Counter Card (ke_counter)
27Author: Michael Hillmann
28Updated: Mon, 14 Apr 2008 15:42:42 +0100
29Status: tested
30
31Configuration 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.
36
37This driver is a simple driver to read the counter values from
38Kolter Electronic PCI Counter Card.
39*/
40
41#include "../comedidev.h"
42
43#include "comedi_pci.h"
44
45#define CNT_DRIVER_NAME         "ke_counter"
46#define PCI_VENDOR_ID_KOLTER    0x1001
47#define CNT_CARD_DEVICE_ID      0x0014
48
49/*-- function prototypes ----------------------------------------------------*/
50
51static int cnt_attach(struct comedi_device * dev, struct comedi_devconfig * it);
52static int cnt_detach(struct comedi_device * dev);
53
54static DEFINE_PCI_DEVICE_TABLE(cnt_pci_table) = {
55	{PCI_VENDOR_ID_KOLTER, CNT_CARD_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
56		0},
57	{0}
58};
59
60MODULE_DEVICE_TABLE(pci, cnt_pci_table);
61
62/*-- board specification structure ------------------------------------------*/
63
64struct cnt_board_struct {
65
66	const char *name;
67	int device_id;
68	int cnt_channel_nbr;
69	int cnt_bits;
70};
71
72
73static const struct cnt_board_struct cnt_boards[] = {
74	{
75	      name:	CNT_DRIVER_NAME,
76	      device_id:CNT_CARD_DEVICE_ID,
77	      cnt_channel_nbr:3,
78      cnt_bits:24}
79};
80
81#define cnt_board_nbr (sizeof(cnt_boards)/sizeof(struct cnt_board_struct))
82
83/*-- device private structure -----------------------------------------------*/
84
85struct cnt_device_private {
86
87	struct pci_dev *pcidev;
88};
89
90
91#define devpriv ((struct cnt_device_private *)dev->private)
92
93static struct comedi_driver cnt_driver = {
94      driver_name:CNT_DRIVER_NAME,
95      module:THIS_MODULE,
96      attach:cnt_attach,
97      detach:cnt_detach,
98};
99
100COMEDI_PCI_INITCLEANUP(cnt_driver, cnt_pci_table);
101
102/*-- counter write ----------------------------------------------------------*/
103
104/* This should be used only for resetting the counters; maybe it is better
105   to make a special command 'reset'. */
106static int cnt_winsn(struct comedi_device * dev,
107	struct comedi_subdevice * s, struct comedi_insn * insn, unsigned int * data)
108{
109	int chan = CR_CHAN(insn->chanspec);
110
111	outb((unsigned char)((data[0] >> 24) & 0xff),
112		dev->iobase + chan * 0x20 + 0x10);
113	outb((unsigned char)((data[0] >> 16) & 0xff),
114		dev->iobase + chan * 0x20 + 0x0c);
115	outb((unsigned char)((data[0] >> 8) & 0xff),
116		dev->iobase + chan * 0x20 + 0x08);
117	outb((unsigned char)((data[0] >> 0) & 0xff),
118		dev->iobase + chan * 0x20 + 0x04);
119
120	/* return the number of samples written */
121	return 1;
122}
123
124/*-- counter read -----------------------------------------------------------*/
125
126static int cnt_rinsn(struct comedi_device * dev,
127	struct comedi_subdevice * s, struct comedi_insn * insn, unsigned int * data)
128{
129	unsigned char a0, a1, a2, a3, a4;
130	int chan = CR_CHAN(insn->chanspec);
131	int result;
132
133	a0 = inb(dev->iobase + chan * 0x20);
134	a1 = inb(dev->iobase + chan * 0x20 + 0x04);
135	a2 = inb(dev->iobase + chan * 0x20 + 0x08);
136	a3 = inb(dev->iobase + chan * 0x20 + 0x0c);
137	a4 = inb(dev->iobase + chan * 0x20 + 0x10);
138
139	result = (a1 + (a2 * 256) + (a3 * 65536));
140	if (a4 > 0)
141		result = result - s->maxdata;
142
143	*data = (unsigned int) result;
144
145	/* return the number of samples read */
146	return 1;
147}
148
149/*-- attach -----------------------------------------------------------------*/
150
151static int cnt_attach(struct comedi_device * dev, struct comedi_devconfig * it)
152{
153	struct comedi_subdevice *subdevice;
154	struct pci_dev *pci_device;
155	struct cnt_board_struct *board;
156	unsigned long io_base;
157	int error, i;
158
159	/* allocate device private structure */
160	if ((error = alloc_private(dev, sizeof(struct cnt_device_private))) < 0) {
161		return error;
162	}
163
164	/* Probe the device to determine what device in the series it is. */
165	for (pci_device = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL);
166		pci_device != NULL;
167		pci_device =
168		pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pci_device)) {
169		if (pci_device->vendor == PCI_VENDOR_ID_KOLTER) {
170			for (i = 0; i < cnt_board_nbr; i++) {
171				if (cnt_boards[i].device_id ==
172					pci_device->device) {
173					/* was a particular bus/slot requested? */
174					if ((it->options[0] != 0)
175						|| (it->options[1] != 0)) {
176						/* are we on the wrong bus/slot? */
177						if (pci_device->bus->number !=
178							it->options[0]
179							|| PCI_SLOT(pci_device->
180								devfn) !=
181							it->options[1]) {
182							continue;
183						}
184					}
185
186					dev->board_ptr = cnt_boards + i;
187					board = (struct cnt_board_struct *) dev->
188						board_ptr;
189					goto found;
190				}
191			}
192		}
193	}
194	printk("comedi%d: no supported board found! (req. bus/slot: %d/%d)\n",
195		dev->minor, it->options[0], it->options[1]);
196	return -EIO;
197
198      found:
199	printk("comedi%d: found %s at PCI bus %d, slot %d\n", dev->minor,
200		board->name, pci_device->bus->number,
201		PCI_SLOT(pci_device->devfn));
202	devpriv->pcidev = pci_device;
203	dev->board_name = board->name;
204
205	/* enable PCI device and request regions */
206	if ((error = comedi_pci_enable(pci_device, CNT_DRIVER_NAME)) < 0) {
207		printk("comedi%d: failed to enable PCI device and request regions!\n", dev->minor);
208		return error;
209	}
210
211	/* read register base address [PCI_BASE_ADDRESS #0] */
212	io_base = pci_resource_start(pci_device, 0);
213	dev->iobase = io_base;
214
215	/* allocate the subdevice structures */
216	if ((error = alloc_subdevices(dev, 1)) < 0) {
217		return error;
218	}
219
220	subdevice = dev->subdevices + 0;
221	dev->read_subdev = subdevice;
222
223	subdevice->type = COMEDI_SUBD_COUNTER;
224	subdevice->subdev_flags = SDF_READABLE /* | SDF_COMMON */ ;
225	subdevice->n_chan = board->cnt_channel_nbr;
226	subdevice->maxdata = (1 << board->cnt_bits) - 1;
227	subdevice->insn_read = cnt_rinsn;
228	subdevice->insn_write = cnt_winsn;
229
230	// select 20MHz clock
231	outb(3, dev->iobase + 248);
232
233	// reset all counters
234	outb(0, dev->iobase);
235	outb(0, dev->iobase + 0x20);
236	outb(0, dev->iobase + 0x40);
237
238	printk("comedi%d: " CNT_DRIVER_NAME " attached.\n", dev->minor);
239	return 0;
240}
241
242/*-- detach -----------------------------------------------------------------*/
243
244static int cnt_detach(struct comedi_device * dev)
245{
246	if (devpriv && devpriv->pcidev) {
247		if (dev->iobase) {
248			comedi_pci_disable(devpriv->pcidev);
249		}
250		pci_dev_put(devpriv->pcidev);
251	}
252	printk("comedi%d: " CNT_DRIVER_NAME " remove\n", dev->minor);
253	return 0;
254}
255