adl_pci7296.c revision 20fb2280815510533cbd7785b53821ca7209345b 
1/*
2    comedi/drivers/adl_pci7296.c
3
4    COMEDI - Linux Control and Measurement Device Interface
5    Copyright (C) 2000 David A. Schleef <ds@schleef.org>
6
7    This program is free software; you can redistribute it and/or modify
8    it under the terms of the GNU General Public License as published by
9    the Free Software Foundation; either version 2 of the License, or
10    (at your option) any later version.
11
12    This program is distributed in the hope that it will be useful,
13    but WITHOUT ANY WARRANTY; without even the implied warranty of
14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15    GNU General Public License for more details.
16
17    You should have received a copy of the GNU General Public License
18    along with this program; if not, write to the Free Software
19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20
21*/
22/*
23Driver: adl_pci7296
24Description: Driver for the Adlink PCI-7296 96 ch. digital io board
25Devices: [ADLink] PCI-7296 (adl_pci7296)
26Author: Jon Grierson <jd@renko.co.uk>
27Updated: Mon, 14 Apr 2008 15:05:56 +0100
28Status: testing
29
30Configuration Options:
31  [0] - PCI bus of device (optional)
32  [1] - PCI slot of device (optional)
33  If bus/slot is not specified, the first supported
34  PCI device found will be used.
35*/
36
37#include "../comedidev.h"
38#include <linux/kernel.h>
39
40#include "comedi_pci.h"
41#include "8255.h"
42/* #include "8253.h" */
43
44#define PORT1A 0
45#define PORT2A 4
46#define PORT3A 8
47#define PORT4A 12
48
49#define PCI_DEVICE_ID_PCI7296 0x7296
50
51static DEFINE_PCI_DEVICE_TABLE(adl_pci7296_pci_table) = {
52	{
53	PCI_VENDOR_ID_ADLINK, PCI_DEVICE_ID_PCI7296, PCI_ANY_ID,
54		    PCI_ANY_ID, 0, 0, 0}, {
55	0}
56};
57
58MODULE_DEVICE_TABLE(pci, adl_pci7296_pci_table);
59
60struct adl_pci7296_private {
61	int data;
62	struct pci_dev *pci_dev;
63};
64
65#define devpriv ((struct adl_pci7296_private *)dev->private)
66
67static int adl_pci7296_attach(struct comedi_device *dev,
68			      struct comedi_devconfig *it);
69static int adl_pci7296_detach(struct comedi_device *dev);
70static struct comedi_driver driver_adl_pci7296 = {
71	.driver_name = "adl_pci7296",
72	.module = THIS_MODULE,
73	.attach = adl_pci7296_attach,
74	.detach = adl_pci7296_detach,
75};
76
77static int adl_pci7296_attach(struct comedi_device *dev,
78			      struct comedi_devconfig *it)
79{
80	struct pci_dev *pcidev = NULL;
81	struct comedi_subdevice *s;
82	int bus, slot;
83	int ret;
84
85	printk(KERN_INFO "comedi%d: attach adl_pci7432\n", dev->minor);
86
87	dev->board_name = "pci7432";
88	bus = it->options[0];
89	slot = it->options[1];
90
91	if (alloc_private(dev, sizeof(struct adl_pci7296_private)) < 0)
92		return -ENOMEM;
93
94	if (alloc_subdevices(dev, 4) < 0)
95		return -ENOMEM;
96
97	for_each_pci_dev(pcidev) {
98		if (pcidev->vendor == PCI_VENDOR_ID_ADLINK &&
99		    pcidev->device == PCI_DEVICE_ID_PCI7296) {
100			if (bus || slot) {
101				/* requested particular bus/slot */
102				if (pcidev->bus->number != bus
103				    || PCI_SLOT(pcidev->devfn) != slot) {
104					continue;
105				}
106			}
107			devpriv->pci_dev = pcidev;
108			if (comedi_pci_enable(pcidev, "adl_pci7296") < 0) {
109				printk(KERN_ERR "comedi%d: Failed to enable PCI device and request regions\n",
110				     dev->minor);
111				return -EIO;
112			}
113
114			dev->iobase = pci_resource_start(pcidev, 2);
115			printk(KERN_INFO "comedi: base addr %4lx\n",
116				dev->iobase);
117
118			/*  four 8255 digital io subdevices */
119			s = dev->subdevices + 0;
120			subdev_8255_init(dev, s, NULL,
121					 (unsigned long)(dev->iobase));
122
123			s = dev->subdevices + 1;
124			ret = subdev_8255_init(dev, s, NULL,
125					       (unsigned long)(dev->iobase +
126							       PORT2A));
127			if (ret < 0)
128				return ret;
129
130			s = dev->subdevices + 2;
131			ret = subdev_8255_init(dev, s, NULL,
132					       (unsigned long)(dev->iobase +
133							       PORT3A));
134			if (ret < 0)
135				return ret;
136
137			s = dev->subdevices + 3;
138			ret = subdev_8255_init(dev, s, NULL,
139					       (unsigned long)(dev->iobase +
140							       PORT4A));
141			if (ret < 0)
142				return ret;
143
144			printk(KERN_DEBUG "comedi%d: adl_pci7432 attached\n",
145				dev->minor);
146
147			return 1;
148		}
149	}
150
151	printk(KERN_ERR "comedi%d: no supported board found! (req. bus/slot : %d/%d)\n",
152	       dev->minor, bus, slot);
153	return -EIO;
154}
155
156static int adl_pci7296_detach(struct comedi_device *dev)
157{
158	printk(KERN_INFO "comedi%d: pci7432: remove\n", dev->minor);
159
160	if (devpriv && devpriv->pci_dev) {
161		if (dev->iobase)
162			comedi_pci_disable(devpriv->pci_dev);
163		pci_dev_put(devpriv->pci_dev);
164	}
165	/*  detach four 8255 digital io subdevices */
166	if (dev->subdevices) {
167		subdev_8255_cleanup(dev, dev->subdevices + 0);
168		subdev_8255_cleanup(dev, dev->subdevices + 1);
169		subdev_8255_cleanup(dev, dev->subdevices + 2);
170		subdev_8255_cleanup(dev, dev->subdevices + 3);
171
172	}
173
174	return 0;
175}
176
177static int __devinit driver_adl_pci7296_pci_probe(struct pci_dev *dev,
178						  const struct pci_device_id
179						  *ent)
180{
181	return comedi_pci_auto_config(dev, driver_adl_pci7296.driver_name);
182}
183
184static void __devexit driver_adl_pci7296_pci_remove(struct pci_dev *dev)
185{
186	comedi_pci_auto_unconfig(dev);
187}
188
189static struct pci_driver driver_adl_pci7296_pci_driver = {
190	.id_table = adl_pci7296_pci_table,
191	.probe = &driver_adl_pci7296_pci_probe,
192	.remove = __devexit_p(&driver_adl_pci7296_pci_remove)
193};
194
195static int __init driver_adl_pci7296_init_module(void)
196{
197	int retval;
198
199	retval = comedi_driver_register(&driver_adl_pci7296);
200	if (retval < 0)
201		return retval;
202
203	driver_adl_pci7296_pci_driver.name =
204	    (char *)driver_adl_pci7296.driver_name;
205	return pci_register_driver(&driver_adl_pci7296_pci_driver);
206}
207
208static void __exit driver_adl_pci7296_cleanup_module(void)
209{
210	pci_unregister_driver(&driver_adl_pci7296_pci_driver);
211	comedi_driver_unregister(&driver_adl_pci7296);
212}
213
214module_init(driver_adl_pci7296_init_module);
215module_exit(driver_adl_pci7296_cleanup_module);
216
217MODULE_AUTHOR("Comedi http://www.comedi.org");
218MODULE_DESCRIPTION("Comedi low-level driver");
219MODULE_LICENSE("GPL");
220