ni_daq_dio24.c revision ef7908ebc3f81bc85c22ebe5e91c85caeeeac544 
1/*
2    comedi/drivers/ni_daq_dio24.c
3    Driver for National Instruments PCMCIA DAQ-Card DIO-24
4    Copyright (C) 2002 Daniel Vecino Castel <dvecino@able.es>
5
6    PCMCIA crap at end of file is adapted from dummy_cs.c 1.31 2001/08/24 12:13:13
7    from the pcmcia package.
8    The initial developer of the pcmcia dummy_cs.c code is David A. Hinds
9    <dahinds@users.sourceforge.net>.  Portions created by David A. Hinds
10    are Copyright (C) 1999 David A. Hinds.  All Rights Reserved.
11
12    This program is free software; you can redistribute it and/or modify
13    it under the terms of the GNU General Public License as published by
14    the Free Software Foundation; either version 2 of the License, or
15    (at your option) any later version.
16
17    This program is distributed in the hope that it will be useful,
18    but WITHOUT ANY WARRANTY; without even the implied warranty of
19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20    GNU General Public License for more details.
21
22    You should have received a copy of the GNU General Public License
23    along with this program; if not, write to the Free Software
24    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25
26************************************************************************
27*/
28/*
29Driver: ni_daq_dio24
30Description: National Instruments PCMCIA DAQ-Card DIO-24
31Author: Daniel Vecino Castel <dvecino@able.es>
32Devices: [National Instruments] PCMCIA DAQ-Card DIO-24 (ni_daq_dio24)
33Status: ?
34Updated: Thu, 07 Nov 2002 21:53:06 -0800
35
36This is just a wrapper around the 8255.o driver to properly handle
37the PCMCIA interface.
38*/
39
40			    /* #define LABPC_DEBUG *//*  enable debugging messages */
41#undef LABPC_DEBUG
42
43#include <linux/interrupt.h>
44#include <linux/slab.h>
45#include "../comedidev.h"
46
47#include <linux/ioport.h>
48
49#include "8255.h"
50
51#include <pcmcia/cistpl.h>
52#include <pcmcia/cisreg.h>
53#include <pcmcia/ds.h>
54
55static struct pcmcia_device *pcmcia_cur_dev;
56
57#define DIO24_SIZE 4		/*  size of io region used by board */
58
59static int dio24_attach(struct comedi_device *dev, struct comedi_devconfig *it);
60static int dio24_detach(struct comedi_device *dev);
61
62enum dio24_bustype { pcmcia_bustype };
63
64struct dio24_board_struct {
65	const char *name;
66	int device_id;		/*  device id for pcmcia board */
67	enum dio24_bustype bustype;	/*  PCMCIA */
68	int have_dio;		/*  have 8255 chip */
69	/*  function pointers so we can use inb/outb or readb/writeb as appropriate */
70	unsigned int (*read_byte) (unsigned int address);
71	void (*write_byte) (unsigned int byte, unsigned int address);
72};
73
74static const struct dio24_board_struct dio24_boards[] = {
75	{
76	 .name = "daqcard-dio24",
77	 .device_id = 0x475c,	/*  0x10b is manufacturer id, 0x475c is device id */
78	 .bustype = pcmcia_bustype,
79	 .have_dio = 1,
80	 },
81	{
82	 .name = "ni_daq_dio24",
83	 .device_id = 0x475c,	/*  0x10b is manufacturer id, 0x475c is device id */
84	 .bustype = pcmcia_bustype,
85	 .have_dio = 1,
86	 },
87};
88
89/*
90 * Useful for shorthand access to the particular board structure
91 */
92#define thisboard ((const struct dio24_board_struct *)dev->board_ptr)
93
94struct dio24_private {
95
96	int data;		/* number of data points left to be taken */
97};
98
99#define devpriv ((struct dio24_private *)dev->private)
100
101static struct comedi_driver driver_dio24 = {
102	.driver_name = "ni_daq_dio24",
103	.module = THIS_MODULE,
104	.attach = dio24_attach,
105	.detach = dio24_detach,
106	.num_names = ARRAY_SIZE(dio24_boards),
107	.board_name = &dio24_boards[0].name,
108	.offset = sizeof(struct dio24_board_struct),
109};
110
111static int dio24_attach(struct comedi_device *dev, struct comedi_devconfig *it)
112{
113	struct comedi_subdevice *s;
114	unsigned long iobase = 0;
115#ifdef incomplete
116	unsigned int irq = 0;
117#endif
118	struct pcmcia_device *link;
119
120	/* allocate and initialize dev->private */
121	if (alloc_private(dev, sizeof(struct dio24_private)) < 0)
122		return -ENOMEM;
123
124	/*  get base address, irq etc. based on bustype */
125	switch (thisboard->bustype) {
126	case pcmcia_bustype:
127		link = pcmcia_cur_dev;	/* XXX hack */
128		if (!link)
129			return -EIO;
130		iobase = link->resource[0]->start;
131#ifdef incomplete
132		irq = link->irq;
133#endif
134		break;
135	default:
136		printk("bug! couldn't determine board type\n");
137		return -EINVAL;
138		break;
139	}
140	printk("comedi%d: ni_daq_dio24: %s, io 0x%lx", dev->minor,
141	       thisboard->name, iobase);
142#ifdef incomplete
143	if (irq)
144		printk(", irq %u", irq);
145#endif
146
147	printk("\n");
148
149	if (iobase == 0) {
150		printk("io base address is zero!\n");
151		return -EINVAL;
152	}
153
154	dev->iobase = iobase;
155
156#ifdef incomplete
157	/* grab our IRQ */
158	dev->irq = irq;
159#endif
160
161	dev->board_name = thisboard->name;
162
163	if (alloc_subdevices(dev, 1) < 0)
164		return -ENOMEM;
165
166	/* 8255 dio */
167	s = dev->subdevices + 0;
168	subdev_8255_init(dev, s, NULL, dev->iobase);
169
170	return 0;
171};
172
173static int dio24_detach(struct comedi_device *dev)
174{
175	printk("comedi%d: ni_daq_dio24: remove\n", dev->minor);
176
177	if (dev->subdevices)
178		subdev_8255_cleanup(dev, dev->subdevices + 0);
179
180	if (thisboard->bustype != pcmcia_bustype && dev->iobase)
181		release_region(dev->iobase, DIO24_SIZE);
182	if (dev->irq)
183		free_irq(dev->irq, dev);
184
185	return 0;
186};
187
188static void dio24_config(struct pcmcia_device *link);
189static void dio24_release(struct pcmcia_device *link);
190static int dio24_cs_suspend(struct pcmcia_device *p_dev);
191static int dio24_cs_resume(struct pcmcia_device *p_dev);
192
193static int dio24_cs_attach(struct pcmcia_device *);
194static void dio24_cs_detach(struct pcmcia_device *);
195
196struct local_info_t {
197	struct pcmcia_device *link;
198	int stop;
199	struct bus_operations *bus;
200};
201
202static int dio24_cs_attach(struct pcmcia_device *link)
203{
204	struct local_info_t *local;
205
206	printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO - CS-attach!\n");
207
208	dev_dbg(&link->dev, "dio24_cs_attach()\n");
209
210	/* Allocate space for private device-specific data */
211	local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL);
212	if (!local)
213		return -ENOMEM;
214	local->link = link;
215	link->priv = local;
216
217	pcmcia_cur_dev = link;
218
219	dio24_config(link);
220
221	return 0;
222}				/* dio24_cs_attach */
223
224static void dio24_cs_detach(struct pcmcia_device *link)
225{
226
227	printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO - cs-detach!\n");
228
229	dev_dbg(&link->dev, "dio24_cs_detach\n");
230
231	((struct local_info_t *)link->priv)->stop = 1;
232	dio24_release(link);
233
234	/* This points to the parent local_info_t struct */
235	kfree(link->priv);
236
237}				/* dio24_cs_detach */
238
239static int dio24_pcmcia_config_loop(struct pcmcia_device *p_dev,
240				void *priv_data)
241{
242	if (p_dev->config_index == 0)
243		return -EINVAL;
244
245	return pcmcia_request_io(p_dev);
246}
247
248static void dio24_config(struct pcmcia_device *link)
249{
250	int ret;
251
252	printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO! - config\n");
253
254	dev_dbg(&link->dev, "dio24_config\n");
255
256	link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_AUDIO |
257		CONF_AUTO_SET_IO;
258
259	ret = pcmcia_loop_config(link, dio24_pcmcia_config_loop, NULL);
260	if (ret) {
261		dev_warn(&link->dev, "no configuration found\n");
262		goto failed;
263	}
264
265	if (!link->irq)
266		goto failed;
267
268	ret = pcmcia_enable_device(link);
269	if (ret)
270		goto failed;
271
272	return;
273
274failed:
275	printk(KERN_INFO "Fallo");
276	dio24_release(link);
277
278}				/* dio24_config */
279
280static void dio24_release(struct pcmcia_device *link)
281{
282	dev_dbg(&link->dev, "dio24_release\n");
283
284	pcmcia_disable_device(link);
285}				/* dio24_release */
286
287static int dio24_cs_suspend(struct pcmcia_device *link)
288{
289	struct local_info_t *local = link->priv;
290
291	/* Mark the device as stopped, to block IO until later */
292	local->stop = 1;
293	return 0;
294}				/* dio24_cs_suspend */
295
296static int dio24_cs_resume(struct pcmcia_device *link)
297{
298	struct local_info_t *local = link->priv;
299
300	local->stop = 0;
301	return 0;
302}				/* dio24_cs_resume */
303
304/*====================================================================*/
305
306static const struct pcmcia_device_id dio24_cs_ids[] = {
307	/* N.B. These IDs should match those in dio24_boards */
308	PCMCIA_DEVICE_MANF_CARD(0x010b, 0x475c),	/* daqcard-dio24 */
309	PCMCIA_DEVICE_NULL
310};
311
312MODULE_DEVICE_TABLE(pcmcia, dio24_cs_ids);
313MODULE_AUTHOR("Daniel Vecino Castel <dvecino@able.es>");
314MODULE_DESCRIPTION("Comedi driver for National Instruments "
315		   "PCMCIA DAQ-Card DIO-24");
316MODULE_LICENSE("GPL");
317
318struct pcmcia_driver dio24_cs_driver = {
319	.probe = dio24_cs_attach,
320	.remove = dio24_cs_detach,
321	.suspend = dio24_cs_suspend,
322	.resume = dio24_cs_resume,
323	.id_table = dio24_cs_ids,
324	.owner = THIS_MODULE,
325	.name = "ni_daq_dio24",
326};
327
328static int __init init_dio24_cs(void)
329{
330	printk("ni_daq_dio24: HOLA SOY YO!\n");
331	pcmcia_register_driver(&dio24_cs_driver);
332	return 0;
333}
334
335static void __exit exit_dio24_cs(void)
336{
337	pcmcia_unregister_driver(&dio24_cs_driver);
338}
339
340int __init init_module(void)
341{
342	int ret;
343
344	ret = init_dio24_cs();
345	if (ret < 0)
346		return ret;
347
348	return comedi_driver_register(&driver_dio24);
349}
350
351void __exit cleanup_module(void)
352{
353	exit_dio24_cs();
354	comedi_driver_unregister(&driver_dio24);
355}
356