adl_pci7296.c revision 0707bb04be89b18ee83b5a997e36cc585f0b988d 
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
59typedef struct {
60	int data;
61	struct pci_dev *pci_dev;
62} adl_pci7296_private;
63
64#define devpriv ((adl_pci7296_private *)dev->private)
65
66static int adl_pci7296_attach(struct comedi_device * dev, struct comedi_devconfig * it);
67static int adl_pci7296_detach(struct comedi_device * dev);
68static struct comedi_driver driver_adl_pci7296 = {
69      driver_name:"adl_pci7296",
70      module:THIS_MODULE,
71      attach:adl_pci7296_attach,
72      detach:adl_pci7296_detach,
73};
74
75static int adl_pci7296_attach(struct comedi_device * dev, struct comedi_devconfig * it)
76{
77	struct pci_dev *pcidev;
78	struct comedi_subdevice *s;
79	int bus, slot;
80	int ret;
81
82	printk("comedi: attempt to attach...\n");
83	printk("comedi%d: adl_pci7432\n", dev->minor);
84
85	dev->board_name = "pci7432";
86	bus = it->options[0];
87	slot = it->options[1];
88
89	if (alloc_private(dev, sizeof(adl_pci7296_private)) < 0)
90		return -ENOMEM;
91
92	if (alloc_subdevices(dev, 4) < 0)
93		return -ENOMEM;
94
95	for (pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, NULL);
96		pcidev != NULL;
97		pcidev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pcidev)) {
98
99		if (pcidev->vendor == PCI_VENDOR_ID_ADLINK &&
100			pcidev->device == PCI_DEVICE_ID_PCI7296) {
101			if (bus || slot) {
102				/* requested particular bus/slot */
103				if (pcidev->bus->number != bus
104					|| PCI_SLOT(pcidev->devfn) != slot) {
105					continue;
106				}
107			}
108			devpriv->pci_dev = pcidev;
109			if (comedi_pci_enable(pcidev, "adl_pci7296") < 0) {
110				printk("comedi%d: Failed to enable PCI device and request regions\n", dev->minor);
111				return -EIO;
112			}
113
114			dev->iobase = pci_resource_start(pcidev, 2);
115			printk("comedi: base addr %4lx\n", dev->iobase);
116
117			// four 8255 digital io subdevices
118			s = dev->subdevices + 0;
119			subdev_8255_init(dev, s, NULL,
120				(unsigned long)(dev->iobase));
121
122			s = dev->subdevices + 1;
123			ret = subdev_8255_init(dev, s, NULL,
124				(unsigned long)(dev->iobase + PORT2A));
125			if (ret < 0)
126				return ret;
127
128			s = dev->subdevices + 2;
129			ret = subdev_8255_init(dev, s, NULL,
130				(unsigned long)(dev->iobase + PORT3A));
131			if (ret < 0)
132				return ret;
133
134			s = dev->subdevices + 3;
135			ret = subdev_8255_init(dev, s, NULL,
136				(unsigned long)(dev->iobase + PORT4A));
137			if (ret < 0)
138				return ret;
139
140			printk("attached\n");
141
142			return 1;
143		}
144	}
145
146	printk("comedi%d: no supported board found! (req. bus/slot : %d/%d)\n",
147		dev->minor, bus, slot);
148	return -EIO;
149}
150
151static int adl_pci7296_detach(struct comedi_device * dev)
152{
153	printk("comedi%d: pci7432: remove\n", dev->minor);
154
155	if (devpriv && devpriv->pci_dev) {
156		if (dev->iobase) {
157			comedi_pci_disable(devpriv->pci_dev);
158		}
159		pci_dev_put(devpriv->pci_dev);
160	}
161	// detach four 8255 digital io subdevices
162	if (dev->subdevices) {
163		subdev_8255_cleanup(dev, dev->subdevices + 0);
164		subdev_8255_cleanup(dev, dev->subdevices + 1);
165		subdev_8255_cleanup(dev, dev->subdevices + 2);
166		subdev_8255_cleanup(dev, dev->subdevices + 3);
167
168	}
169
170	return 0;
171}
172
173COMEDI_PCI_INITCLEANUP(driver_adl_pci7296, adl_pci7296_pci_table);
174