ni_daq_dio24.c revision 2202a5a7490a9de282846ea8d4a56d0249e09033 
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 = NULL;
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	}
146#endif
147
148	printk("\n");
149
150	if (iobase == 0) {
151		printk("io base address is zero!\n");
152		return -EINVAL;
153	}
154
155	dev->iobase = iobase;
156
157#ifdef incomplete
158	/* grab our IRQ */
159	dev->irq = irq;
160#endif
161
162	dev->board_name = thisboard->name;
163
164	if (alloc_subdevices(dev, 1) < 0)
165		return -ENOMEM;
166
167	/* 8255 dio */
168	s = dev->subdevices + 0;
169	subdev_8255_init(dev, s, NULL, dev->iobase);
170
171	return 0;
172};
173
174static int dio24_detach(struct comedi_device *dev)
175{
176	printk("comedi%d: ni_daq_dio24: remove\n", dev->minor);
177
178	if (dev->subdevices)
179		subdev_8255_cleanup(dev, dev->subdevices + 0);
180
181	if (thisboard->bustype != pcmcia_bustype && dev->iobase)
182		release_region(dev->iobase, DIO24_SIZE);
183	if (dev->irq)
184		free_irq(dev->irq, dev);
185
186	return 0;
187};
188
189static void dio24_config(struct pcmcia_device *link);
190static void dio24_release(struct pcmcia_device *link);
191static int dio24_cs_suspend(struct pcmcia_device *p_dev);
192static int dio24_cs_resume(struct pcmcia_device *p_dev);
193
194static int dio24_cs_attach(struct pcmcia_device *);
195static void dio24_cs_detach(struct pcmcia_device *);
196
197struct local_info_t {
198	struct pcmcia_device *link;
199	int stop;
200	struct bus_operations *bus;
201};
202
203static int dio24_cs_attach(struct pcmcia_device *link)
204{
205	struct local_info_t *local;
206
207	printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO - CS-attach!\n");
208
209	dev_dbg(&link->dev, "dio24_cs_attach()\n");
210
211	/* Allocate space for private device-specific data */
212	local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL);
213	if (!local)
214		return -ENOMEM;
215	local->link = link;
216	link->priv = local;
217
218	pcmcia_cur_dev = link;
219
220	dio24_config(link);
221
222	return 0;
223}				/* dio24_cs_attach */
224
225static void dio24_cs_detach(struct pcmcia_device *link)
226{
227
228	printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO - cs-detach!\n");
229
230	dev_dbg(&link->dev, "dio24_cs_detach\n");
231
232	((struct local_info_t *)link->priv)->stop = 1;
233	dio24_release(link);
234
235	/* This points to the parent local_info_t struct */
236	kfree(link->priv);
237
238}				/* dio24_cs_detach */
239
240static int dio24_pcmcia_config_loop(struct pcmcia_device *p_dev,
241				void *priv_data)
242{
243	if (p_dev->config_index == 0)
244		return -EINVAL;
245
246	return pcmcia_request_io(p_dev);
247}
248
249static void dio24_config(struct pcmcia_device *link)
250{
251	int ret;
252
253	printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO! - config\n");
254
255	dev_dbg(&link->dev, "dio24_config\n");
256
257	link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_AUDIO |
258		CONF_AUTO_SET_IO;
259
260	ret = pcmcia_loop_config(link, dio24_pcmcia_config_loop, NULL);
261	if (ret) {
262		dev_warn(&link->dev, "no configuration found\n");
263		goto failed;
264	}
265
266	if (!link->irq)
267		goto failed;
268
269	ret = pcmcia_enable_device(link);
270	if (ret)
271		goto failed;
272
273	return;
274
275failed:
276	printk(KERN_INFO "Fallo");
277	dio24_release(link);
278
279}				/* dio24_config */
280
281static void dio24_release(struct pcmcia_device *link)
282{
283	dev_dbg(&link->dev, "dio24_release\n");
284
285	pcmcia_disable_device(link);
286}				/* dio24_release */
287
288static int dio24_cs_suspend(struct pcmcia_device *link)
289{
290	struct local_info_t *local = link->priv;
291
292	/* Mark the device as stopped, to block IO until later */
293	local->stop = 1;
294	return 0;
295}				/* dio24_cs_suspend */
296
297static int dio24_cs_resume(struct pcmcia_device *link)
298{
299	struct local_info_t *local = link->priv;
300
301	local->stop = 0;
302	return 0;
303}				/* dio24_cs_resume */
304
305/*====================================================================*/
306
307static const struct pcmcia_device_id dio24_cs_ids[] = {
308	/* N.B. These IDs should match those in dio24_boards */
309	PCMCIA_DEVICE_MANF_CARD(0x010b, 0x475c),	/* daqcard-dio24 */
310	PCMCIA_DEVICE_NULL
311};
312
313MODULE_DEVICE_TABLE(pcmcia, dio24_cs_ids);
314MODULE_AUTHOR("Daniel Vecino Castel <dvecino@able.es>");
315MODULE_DESCRIPTION("Comedi driver for National Instruments "
316		   "PCMCIA DAQ-Card DIO-24");
317MODULE_LICENSE("GPL");
318
319struct pcmcia_driver dio24_cs_driver = {
320	.probe = dio24_cs_attach,
321	.remove = dio24_cs_detach,
322	.suspend = dio24_cs_suspend,
323	.resume = dio24_cs_resume,
324	.id_table = dio24_cs_ids,
325	.owner = THIS_MODULE,
326	.name = "ni_daq_dio24",
327};
328
329static int __init init_dio24_cs(void)
330{
331	printk("ni_daq_dio24: HOLA SOY YO!\n");
332	pcmcia_register_driver(&dio24_cs_driver);
333	return 0;
334}
335
336static void __exit exit_dio24_cs(void)
337{
338	pcmcia_unregister_driver(&dio24_cs_driver);
339}
340
341int __init init_module(void)
342{
343	int ret;
344
345	ret = init_dio24_cs();
346	if (ret < 0)
347		return ret;
348
349	return comedi_driver_register(&driver_dio24);
350}
351
352void __exit cleanup_module(void)
353{
354	exit_dio24_cs();
355	comedi_driver_unregister(&driver_dio24);
356}
357