ke_counter.c revision 0a85b6f0ab0d2edb0d41b32697111ce0e4f43496 
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	{
56	PCI_VENDOR_ID_KOLTER, CNT_CARD_DEVICE_ID, PCI_ANY_ID,
57		    PCI_ANY_ID, 0, 0, 0}, {
58	0}
59};
60
61MODULE_DEVICE_TABLE(pci, cnt_pci_table);
62
63/*-- board specification structure ------------------------------------------*/
64
65struct cnt_board_struct {
66
67	const char *name;
68	int device_id;
69	int cnt_channel_nbr;
70	int cnt_bits;
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#define devpriv ((struct cnt_device_private *)dev->private)
91
92static struct comedi_driver cnt_driver = {
93	.driver_name = CNT_DRIVER_NAME,
94	.module = THIS_MODULE,
95	.attach = cnt_attach,
96	.detach = cnt_detach,
97};
98
99COMEDI_PCI_INITCLEANUP(cnt_driver, cnt_pci_table);
100
101/*-- counter write ----------------------------------------------------------*/
102
103/* This should be used only for resetting the counters; maybe it is better
104   to make a special command 'reset'. */
105static int cnt_winsn(struct comedi_device *dev,
106		     struct comedi_subdevice *s, struct comedi_insn *insn,
107		     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,
128		     unsigned int *data)
129{
130	unsigned char a0, a1, a2, a3, a4;
131	int chan = CR_CHAN(insn->chanspec);
132	int result;
133
134	a0 = inb(dev->iobase + chan * 0x20);
135	a1 = inb(dev->iobase + chan * 0x20 + 0x04);
136	a2 = inb(dev->iobase + chan * 0x20 + 0x08);
137	a3 = inb(dev->iobase + chan * 0x20 + 0x0c);
138	a4 = inb(dev->iobase + chan * 0x20 + 0x10);
139
140	result = (a1 + (a2 * 256) + (a3 * 65536));
141	if (a4 > 0)
142		result = result - s->maxdata;
143
144	*data = (unsigned int)result;
145
146	/* return the number of samples read */
147	return 1;
148}
149
150/*-- attach -----------------------------------------------------------------*/
151
152static int cnt_attach(struct comedi_device *dev, struct comedi_devconfig *it)
153{
154	struct comedi_subdevice *subdevice;
155	struct pci_dev *pci_device;
156	struct cnt_board_struct *board;
157	unsigned long io_base;
158	int error, i;
159
160	/* allocate device private structure */
161	error = alloc_private(dev, sizeof(struct cnt_device_private));
162	if (error < 0)
163		return error;
164
165	/* Probe the device to determine what device in the series it is. */
166	for (pci_device = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL);
167	     pci_device != NULL;
168	     pci_device = 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						    ||
180						    PCI_SLOT(pci_device->devfn)
181						    != it->options[1]) {
182							continue;
183						}
184					}
185
186					dev->board_ptr = cnt_boards + i;
187					board =
188					    (struct cnt_board_struct *)
189					    dev->board_ptr;
190					goto found;
191				}
192			}
193		}
194	}
195	printk("comedi%d: no supported board found! (req. bus/slot: %d/%d)\n",
196	       dev->minor, it->options[0], it->options[1]);
197	return -EIO;
198
199found:
200	printk("comedi%d: found %s at PCI bus %d, slot %d\n", dev->minor,
201	       board->name, pci_device->bus->number,
202	       PCI_SLOT(pci_device->devfn));
203	devpriv->pcidev = pci_device;
204	dev->board_name = board->name;
205
206	/* enable PCI device and request regions */
207	error = comedi_pci_enable(pci_device, CNT_DRIVER_NAME);
208	if (error < 0) {
209		printk
210		    ("comedi%d: failed to enable PCI device and request regions!\n",
211		     dev->minor);
212		return error;
213	}
214
215	/* read register base address [PCI_BASE_ADDRESS #0] */
216	io_base = pci_resource_start(pci_device, 0);
217	dev->iobase = io_base;
218
219	/* allocate the subdevice structures */
220	error = alloc_subdevices(dev, 1);
221	if (error < 0)
222		return error;
223
224	subdevice = dev->subdevices + 0;
225	dev->read_subdev = subdevice;
226
227	subdevice->type = COMEDI_SUBD_COUNTER;
228	subdevice->subdev_flags = SDF_READABLE /* | SDF_COMMON */ ;
229	subdevice->n_chan = board->cnt_channel_nbr;
230	subdevice->maxdata = (1 << board->cnt_bits) - 1;
231	subdevice->insn_read = cnt_rinsn;
232	subdevice->insn_write = cnt_winsn;
233
234	/*  select 20MHz clock */
235	outb(3, dev->iobase + 248);
236
237	/*  reset all counters */
238	outb(0, dev->iobase);
239	outb(0, dev->iobase + 0x20);
240	outb(0, dev->iobase + 0x40);
241
242	printk("comedi%d: " CNT_DRIVER_NAME " attached.\n", dev->minor);
243	return 0;
244}
245
246/*-- detach -----------------------------------------------------------------*/
247
248static int cnt_detach(struct comedi_device *dev)
249{
250	if (devpriv && devpriv->pcidev) {
251		if (dev->iobase) {
252			comedi_pci_disable(devpriv->pcidev);
253		}
254		pci_dev_put(devpriv->pcidev);
255	}
256	printk("comedi%d: " CNT_DRIVER_NAME " remove\n", dev->minor);
257	return 0;
258}
259