adl_pci7296.c revision 8dca707e148ed7c25a5d9fc37a831e5fc56776fa 
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	{PCI_VENDOR_ID_ADLINK, PCI_DEVICE_ID_PCI7296, PCI_ANY_ID, PCI_ANY_ID, 0,
53		0, 0},
54	{0}
55};
56
57MODULE_DEVICE_TABLE(pci, adl_pci7296_pci_table);
58
59struct adl_pci7296_private {
60	int data;
61	struct pci_dev *pci_dev;
62};
63
64
65#define devpriv ((struct adl_pci7296_private *)dev->private)
66
67static int adl_pci7296_attach(struct comedi_device * dev, struct comedi_devconfig * it);
68static int adl_pci7296_detach(struct comedi_device * dev);
69static struct comedi_driver driver_adl_pci7296 = {
70      driver_name:"adl_pci7296",
71      module:THIS_MODULE,
72      attach:adl_pci7296_attach,
73      detach:adl_pci7296_detach,
74};
75
76static int adl_pci7296_attach(struct comedi_device * dev, struct comedi_devconfig * it)
77{
78	struct pci_dev *pcidev;
79	struct comedi_subdevice *s;
80	int bus, slot;
81	int ret;
82
83	printk("comedi: attempt to attach...\n");
84	printk("comedi%d: adl_pci7432\n", dev->minor);
85
86	dev->board_name = "pci7432";
87	bus = it->options[0];
88	slot = it->options[1];
89
90	if (alloc_private(dev, sizeof(struct adl_pci7296_private)) < 0)
91		return -ENOMEM;
92
93	if (alloc_subdevices(dev, 4) < 0)
94		return -ENOMEM;
95
96	for (pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL);
97		pcidev != NULL;
98		pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pcidev)) {
99
100		if (pcidev->vendor == PCI_VENDOR_ID_ADLINK &&
101			pcidev->device == PCI_DEVICE_ID_PCI7296) {
102			if (bus || slot) {
103				/* requested particular bus/slot */
104				if (pcidev->bus->number != bus
105					|| PCI_SLOT(pcidev->devfn) != slot) {
106					continue;
107				}
108			}
109			devpriv->pci_dev = pcidev;
110			if (comedi_pci_enable(pcidev, "adl_pci7296") < 0) {
111				printk("comedi%d: Failed to enable PCI device and request regions\n", dev->minor);
112				return -EIO;
113			}
114
115			dev->iobase = pci_resource_start(pcidev, 2);
116			printk("comedi: base addr %4lx\n", 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 + PORT2A));
126			if (ret < 0)
127				return ret;
128
129			s = dev->subdevices + 2;
130			ret = subdev_8255_init(dev, s, NULL,
131				(unsigned long)(dev->iobase + PORT3A));
132			if (ret < 0)
133				return ret;
134
135			s = dev->subdevices + 3;
136			ret = subdev_8255_init(dev, s, NULL,
137				(unsigned long)(dev->iobase + PORT4A));
138			if (ret < 0)
139				return ret;
140
141			printk("attached\n");
142
143			return 1;
144		}
145	}
146
147	printk("comedi%d: no supported board found! (req. bus/slot : %d/%d)\n",
148		dev->minor, bus, slot);
149	return -EIO;
150}
151
152static int adl_pci7296_detach(struct comedi_device * dev)
153{
154	printk("comedi%d: pci7432: remove\n", dev->minor);
155
156	if (devpriv && devpriv->pci_dev) {
157		if (dev->iobase) {
158			comedi_pci_disable(devpriv->pci_dev);
159		}
160		pci_dev_put(devpriv->pci_dev);
161	}
162	// detach four 8255 digital io subdevices
163	if (dev->subdevices) {
164		subdev_8255_cleanup(dev, dev->subdevices + 0);
165		subdev_8255_cleanup(dev, dev->subdevices + 1);
166		subdev_8255_cleanup(dev, dev->subdevices + 2);
167		subdev_8255_cleanup(dev, dev->subdevices + 3);
168
169	}
170
171	return 0;
172}
173
174COMEDI_PCI_INITCLEANUP(driver_adl_pci7296, adl_pci7296_pci_table);
175