ke_counter.c revision 790c55415aa31f4c732729f94d2c3a54f7d3bfc2 
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(comedi_device * dev, comedi_devconfig * it);
52static int cnt_detach(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
64typedef struct {
65	const char *name;
66	int device_id;
67	int cnt_channel_nbr;
68	int cnt_bits;
69} cnt_board_struct;
70
71static const cnt_board_struct cnt_boards[] = {
72	{
73	      name:	CNT_DRIVER_NAME,
74	      device_id:CNT_CARD_DEVICE_ID,
75	      cnt_channel_nbr:3,
76      cnt_bits:24}
77};
78
79#define cnt_board_nbr (sizeof(cnt_boards)/sizeof(cnt_board_struct))
80
81/*-- device private structure -----------------------------------------------*/
82
83typedef struct {
84	struct pci_dev *pcidev;
85} cnt_device_private;
86
87#define devpriv ((cnt_device_private *)dev->private)
88
89static comedi_driver cnt_driver = {
90      driver_name:CNT_DRIVER_NAME,
91      module:THIS_MODULE,
92      attach:cnt_attach,
93      detach:cnt_detach,
94};
95
96COMEDI_PCI_INITCLEANUP(cnt_driver, cnt_pci_table);
97
98/*-- counter write ----------------------------------------------------------*/
99
100/* This should be used only for resetting the counters; maybe it is better
101   to make a special command 'reset'. */
102static int cnt_winsn(comedi_device * dev,
103	comedi_subdevice * s, comedi_insn * insn, unsigned int * data)
104{
105	int chan = CR_CHAN(insn->chanspec);
106
107	outb((unsigned char)((data[0] >> 24) & 0xff),
108		dev->iobase + chan * 0x20 + 0x10);
109	outb((unsigned char)((data[0] >> 16) & 0xff),
110		dev->iobase + chan * 0x20 + 0x0c);
111	outb((unsigned char)((data[0] >> 8) & 0xff),
112		dev->iobase + chan * 0x20 + 0x08);
113	outb((unsigned char)((data[0] >> 0) & 0xff),
114		dev->iobase + chan * 0x20 + 0x04);
115
116	/* return the number of samples written */
117	return 1;
118}
119
120/*-- counter read -----------------------------------------------------------*/
121
122static int cnt_rinsn(comedi_device * dev,
123	comedi_subdevice * s, comedi_insn * insn, unsigned int * data)
124{
125	unsigned char a0, a1, a2, a3, a4;
126	int chan = CR_CHAN(insn->chanspec);
127	int result;
128
129	a0 = inb(dev->iobase + chan * 0x20);
130	a1 = inb(dev->iobase + chan * 0x20 + 0x04);
131	a2 = inb(dev->iobase + chan * 0x20 + 0x08);
132	a3 = inb(dev->iobase + chan * 0x20 + 0x0c);
133	a4 = inb(dev->iobase + chan * 0x20 + 0x10);
134
135	result = (a1 + (a2 * 256) + (a3 * 65536));
136	if (a4 > 0)
137		result = result - s->maxdata;
138
139	*data = (unsigned int) result;
140
141	/* return the number of samples read */
142	return 1;
143}
144
145/*-- attach -----------------------------------------------------------------*/
146
147static int cnt_attach(comedi_device * dev, comedi_devconfig * it)
148{
149	comedi_subdevice *subdevice;
150	struct pci_dev *pci_device;
151	cnt_board_struct *board;
152	unsigned long io_base;
153	int error, i;
154
155	/* allocate device private structure */
156	if ((error = alloc_private(dev, sizeof(cnt_device_private))) < 0) {
157		return error;
158	}
159
160	/* Probe the device to determine what device in the series it is. */
161	for (pci_device = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL);
162		pci_device != NULL;
163		pci_device =
164		pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pci_device)) {
165		if (pci_device->vendor == PCI_VENDOR_ID_KOLTER) {
166			for (i = 0; i < cnt_board_nbr; i++) {
167				if (cnt_boards[i].device_id ==
168					pci_device->device) {
169					/* was a particular bus/slot requested? */
170					if ((it->options[0] != 0)
171						|| (it->options[1] != 0)) {
172						/* are we on the wrong bus/slot? */
173						if (pci_device->bus->number !=
174							it->options[0]
175							|| PCI_SLOT(pci_device->
176								devfn) !=
177							it->options[1]) {
178							continue;
179						}
180					}
181
182					dev->board_ptr = cnt_boards + i;
183					board = (cnt_board_struct *) dev->
184						board_ptr;
185					goto found;
186				}
187			}
188		}
189	}
190	printk("comedi%d: no supported board found! (req. bus/slot: %d/%d)\n",
191		dev->minor, it->options[0], it->options[1]);
192	return -EIO;
193
194      found:
195	printk("comedi%d: found %s at PCI bus %d, slot %d\n", dev->minor,
196		board->name, pci_device->bus->number,
197		PCI_SLOT(pci_device->devfn));
198	devpriv->pcidev = pci_device;
199	dev->board_name = board->name;
200
201	/* enable PCI device and request regions */
202	if ((error = comedi_pci_enable(pci_device, CNT_DRIVER_NAME)) < 0) {
203		printk("comedi%d: failed to enable PCI device and request regions!\n", dev->minor);
204		return error;
205	}
206
207	/* read register base address [PCI_BASE_ADDRESS #0] */
208	io_base = pci_resource_start(pci_device, 0);
209	dev->iobase = io_base;
210
211	/* allocate the subdevice structures */
212	if ((error = alloc_subdevices(dev, 1)) < 0) {
213		return error;
214	}
215
216	subdevice = dev->subdevices + 0;
217	dev->read_subdev = subdevice;
218
219	subdevice->type = COMEDI_SUBD_COUNTER;
220	subdevice->subdev_flags = SDF_READABLE /* | SDF_COMMON */ ;
221	subdevice->n_chan = board->cnt_channel_nbr;
222	subdevice->maxdata = (1 << board->cnt_bits) - 1;
223	subdevice->insn_read = cnt_rinsn;
224	subdevice->insn_write = cnt_winsn;
225
226	// select 20MHz clock
227	outb(3, dev->iobase + 248);
228
229	// reset all counters
230	outb(0, dev->iobase);
231	outb(0, dev->iobase + 0x20);
232	outb(0, dev->iobase + 0x40);
233
234	printk("comedi%d: " CNT_DRIVER_NAME " attached.\n", dev->minor);
235	return 0;
236}
237
238/*-- detach -----------------------------------------------------------------*/
239
240static int cnt_detach(comedi_device * dev)
241{
242	if (devpriv && devpriv->pcidev) {
243		if (dev->iobase) {
244			comedi_pci_disable(devpriv->pcidev);
245		}
246		pci_dev_put(devpriv->pcidev);
247	}
248	printk("comedi%d: " CNT_DRIVER_NAME " remove\n", dev->minor);
249	return 0;
250}
251