ke_counter.c revision 9beff277bb14a844b5cb437fcdca9db7534ee44a 
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
85typedef struct {
86	struct pci_dev *pcidev;
87} cnt_device_private;
88
89#define devpriv ((cnt_device_private *)dev->private)
90
91static struct comedi_driver cnt_driver = {
92      driver_name:CNT_DRIVER_NAME,
93      module:THIS_MODULE,
94      attach:cnt_attach,
95      detach:cnt_detach,
96};
97
98COMEDI_PCI_INITCLEANUP(cnt_driver, cnt_pci_table);
99
100/*-- counter write ----------------------------------------------------------*/
101
102/* This should be used only for resetting the counters; maybe it is better
103   to make a special command 'reset'. */
104static int cnt_winsn(struct comedi_device * dev,
105	struct comedi_subdevice * s, struct comedi_insn * insn, unsigned int * data)
106{
107	int chan = CR_CHAN(insn->chanspec);
108
109	outb((unsigned char)((data[0] >> 24) & 0xff),
110		dev->iobase + chan * 0x20 + 0x10);
111	outb((unsigned char)((data[0] >> 16) & 0xff),
112		dev->iobase + chan * 0x20 + 0x0c);
113	outb((unsigned char)((data[0] >> 8) & 0xff),
114		dev->iobase + chan * 0x20 + 0x08);
115	outb((unsigned char)((data[0] >> 0) & 0xff),
116		dev->iobase + chan * 0x20 + 0x04);
117
118	/* return the number of samples written */
119	return 1;
120}
121
122/*-- counter read -----------------------------------------------------------*/
123
124static int cnt_rinsn(struct comedi_device * dev,
125	struct comedi_subdevice * s, struct comedi_insn * insn, unsigned int * data)
126{
127	unsigned char a0, a1, a2, a3, a4;
128	int chan = CR_CHAN(insn->chanspec);
129	int result;
130
131	a0 = inb(dev->iobase + chan * 0x20);
132	a1 = inb(dev->iobase + chan * 0x20 + 0x04);
133	a2 = inb(dev->iobase + chan * 0x20 + 0x08);
134	a3 = inb(dev->iobase + chan * 0x20 + 0x0c);
135	a4 = inb(dev->iobase + chan * 0x20 + 0x10);
136
137	result = (a1 + (a2 * 256) + (a3 * 65536));
138	if (a4 > 0)
139		result = result - s->maxdata;
140
141	*data = (unsigned int) result;
142
143	/* return the number of samples read */
144	return 1;
145}
146
147/*-- attach -----------------------------------------------------------------*/
148
149static int cnt_attach(struct comedi_device * dev, struct comedi_devconfig * it)
150{
151	struct comedi_subdevice *subdevice;
152	struct pci_dev *pci_device;
153	struct cnt_board_struct *board;
154	unsigned long io_base;
155	int error, i;
156
157	/* allocate device private structure */
158	if ((error = alloc_private(dev, sizeof(cnt_device_private))) < 0) {
159		return error;
160	}
161
162	/* Probe the device to determine what device in the series it is. */
163	for (pci_device = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL);
164		pci_device != NULL;
165		pci_device =
166		pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pci_device)) {
167		if (pci_device->vendor == PCI_VENDOR_ID_KOLTER) {
168			for (i = 0; i < cnt_board_nbr; i++) {
169				if (cnt_boards[i].device_id ==
170					pci_device->device) {
171					/* was a particular bus/slot requested? */
172					if ((it->options[0] != 0)
173						|| (it->options[1] != 0)) {
174						/* are we on the wrong bus/slot? */
175						if (pci_device->bus->number !=
176							it->options[0]
177							|| PCI_SLOT(pci_device->
178								devfn) !=
179							it->options[1]) {
180							continue;
181						}
182					}
183
184					dev->board_ptr = cnt_boards + i;
185					board = (struct cnt_board_struct *) dev->
186						board_ptr;
187					goto found;
188				}
189			}
190		}
191	}
192	printk("comedi%d: no supported board found! (req. bus/slot: %d/%d)\n",
193		dev->minor, it->options[0], it->options[1]);
194	return -EIO;
195
196      found:
197	printk("comedi%d: found %s at PCI bus %d, slot %d\n", dev->minor,
198		board->name, pci_device->bus->number,
199		PCI_SLOT(pci_device->devfn));
200	devpriv->pcidev = pci_device;
201	dev->board_name = board->name;
202
203	/* enable PCI device and request regions */
204	if ((error = comedi_pci_enable(pci_device, CNT_DRIVER_NAME)) < 0) {
205		printk("comedi%d: failed to enable PCI device and request regions!\n", dev->minor);
206		return error;
207	}
208
209	/* read register base address [PCI_BASE_ADDRESS #0] */
210	io_base = pci_resource_start(pci_device, 0);
211	dev->iobase = io_base;
212
213	/* allocate the subdevice structures */
214	if ((error = alloc_subdevices(dev, 1)) < 0) {
215		return error;
216	}
217
218	subdevice = dev->subdevices + 0;
219	dev->read_subdev = subdevice;
220
221	subdevice->type = COMEDI_SUBD_COUNTER;
222	subdevice->subdev_flags = SDF_READABLE /* | SDF_COMMON */ ;
223	subdevice->n_chan = board->cnt_channel_nbr;
224	subdevice->maxdata = (1 << board->cnt_bits) - 1;
225	subdevice->insn_read = cnt_rinsn;
226	subdevice->insn_write = cnt_winsn;
227
228	// select 20MHz clock
229	outb(3, dev->iobase + 248);
230
231	// reset all counters
232	outb(0, dev->iobase);
233	outb(0, dev->iobase + 0x20);
234	outb(0, dev->iobase + 0x40);
235
236	printk("comedi%d: " CNT_DRIVER_NAME " attached.\n", dev->minor);
237	return 0;
238}
239
240/*-- detach -----------------------------------------------------------------*/
241
242static int cnt_detach(struct comedi_device * dev)
243{
244	if (devpriv && devpriv->pcidev) {
245		if (dev->iobase) {
246			comedi_pci_disable(devpriv->pcidev);
247		}
248		pci_dev_put(devpriv->pcidev);
249	}
250	printk("comedi%d: " CNT_DRIVER_NAME " remove\n", dev->minor);
251	return 0;
252}
253