ni_daq_dio24.c revision de46fb7776da0565fa71cb407c7eb45ce87676b9 
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 void 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
99static struct comedi_driver driver_dio24 = {
100	.driver_name = "ni_daq_dio24",
101	.module = THIS_MODULE,
102	.attach = dio24_attach,
103	.detach = dio24_detach,
104	.num_names = ARRAY_SIZE(dio24_boards),
105	.board_name = &dio24_boards[0].name,
106	.offset = sizeof(struct dio24_board_struct),
107};
108
109static int dio24_attach(struct comedi_device *dev, struct comedi_devconfig *it)
110{
111	struct dio24_private *devpriv;
112	struct comedi_subdevice *s;
113	unsigned long iobase = 0;
114#ifdef incomplete
115	unsigned int irq = 0;
116#endif
117	struct pcmcia_device *link;
118	int ret;
119
120	devpriv = kzalloc(sizeof(*devpriv), GFP_KERNEL);
121	if (!devpriv)
122		return -ENOMEM;
123	dev->private = devpriv;
124
125	/*  get base address, irq etc. based on bustype */
126	switch (thisboard->bustype) {
127	case pcmcia_bustype:
128		link = pcmcia_cur_dev;	/* XXX hack */
129		if (!link)
130			return -EIO;
131		iobase = link->resource[0]->start;
132#ifdef incomplete
133		irq = link->irq;
134#endif
135		break;
136	default:
137		pr_err("bug! couldn't determine board type\n");
138		return -EINVAL;
139		break;
140	}
141	pr_debug("comedi%d: ni_daq_dio24: %s, io 0x%lx", dev->minor,
142		 thisboard->name, iobase);
143#ifdef incomplete
144	if (irq)
145		pr_debug("irq %u\n", irq);
146#endif
147
148	if (iobase == 0) {
149		pr_err("io base address is zero!\n");
150		return -EINVAL;
151	}
152
153	dev->iobase = iobase;
154
155#ifdef incomplete
156	/* grab our IRQ */
157	dev->irq = irq;
158#endif
159
160	dev->board_name = thisboard->name;
161
162	ret = comedi_alloc_subdevices(dev, 1);
163	if (ret)
164		return ret;
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 void dio24_detach(struct comedi_device *dev)
174{
175	struct comedi_subdevice *s;
176
177	if (dev->subdevices) {
178		s = &dev->subdevices[0];
179		subdev_8255_cleanup(dev, s);
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
187static void dio24_config(struct pcmcia_device *link);
188
189struct local_info_t {
190	struct pcmcia_device *link;
191	int stop;
192	struct bus_operations *bus;
193};
194
195static int dio24_cs_attach(struct pcmcia_device *link)
196{
197	struct local_info_t *local;
198
199	dev_info(&link->dev, "ni_daq_dio24: HOLA SOY YO - CS-attach!\n");
200
201	dev_dbg(&link->dev, "dio24_cs_attach()\n");
202
203	/* Allocate space for private device-specific data */
204	local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL);
205	if (!local)
206		return -ENOMEM;
207	local->link = link;
208	link->priv = local;
209
210	pcmcia_cur_dev = link;
211
212	dio24_config(link);
213
214	return 0;
215}				/* dio24_cs_attach */
216
217static void dio24_cs_detach(struct pcmcia_device *link)
218{
219	((struct local_info_t *)link->priv)->stop = 1;
220	pcmcia_disable_device(link);
221
222	/* This points to the parent local_info_t struct */
223	kfree(link->priv);
224}
225
226static int dio24_pcmcia_config_loop(struct pcmcia_device *p_dev,
227				void *priv_data)
228{
229	if (p_dev->config_index == 0)
230		return -EINVAL;
231
232	return pcmcia_request_io(p_dev);
233}
234
235static void dio24_config(struct pcmcia_device *link)
236{
237	int ret;
238
239	dev_info(&link->dev, "ni_daq_dio24: HOLA SOY YO! - config\n");
240
241	dev_dbg(&link->dev, "dio24_config\n");
242
243	link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_AUDIO |
244		CONF_AUTO_SET_IO;
245
246	ret = pcmcia_loop_config(link, dio24_pcmcia_config_loop, NULL);
247	if (ret) {
248		dev_warn(&link->dev, "no configuration found\n");
249		goto failed;
250	}
251
252	if (!link->irq)
253		goto failed;
254
255	ret = pcmcia_enable_device(link);
256	if (ret)
257		goto failed;
258
259	return;
260
261failed:
262	dev_info(&link->dev, "Fallo");
263	pcmcia_disable_device(link);
264}
265
266static int dio24_cs_suspend(struct pcmcia_device *link)
267{
268	struct local_info_t *local = link->priv;
269
270	/* Mark the device as stopped, to block IO until later */
271	local->stop = 1;
272	return 0;
273}				/* dio24_cs_suspend */
274
275static int dio24_cs_resume(struct pcmcia_device *link)
276{
277	struct local_info_t *local = link->priv;
278
279	local->stop = 0;
280	return 0;
281}				/* dio24_cs_resume */
282
283/*====================================================================*/
284
285static const struct pcmcia_device_id dio24_cs_ids[] = {
286	/* N.B. These IDs should match those in dio24_boards */
287	PCMCIA_DEVICE_MANF_CARD(0x010b, 0x475c),	/* daqcard-dio24 */
288	PCMCIA_DEVICE_NULL
289};
290MODULE_DEVICE_TABLE(pcmcia, dio24_cs_ids);
291
292static struct pcmcia_driver dio24_cs_driver = {
293	.name		= "ni_daq_dio24",
294	.owner		= THIS_MODULE,
295	.id_table	= dio24_cs_ids,
296	.probe		= dio24_cs_attach,
297	.remove		= dio24_cs_detach,
298	.suspend	= dio24_cs_suspend,
299	.resume		= dio24_cs_resume,
300};
301module_comedi_pcmcia_driver(driver_dio24, dio24_cs_driver);
302
303MODULE_AUTHOR("Daniel Vecino Castel <dvecino@able.es>");
304MODULE_DESCRIPTION(
305	"Comedi driver for National Instruments PCMCIA DAQ-Card DIO-24");
306MODULE_LICENSE("GPL");
307