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		pr_err("bug! couldn't determine board type\n");
137		return -EINVAL;
138		break;
139	}
140	pr_debug("comedi%d: ni_daq_dio24: %s, io 0x%lx", dev->minor,
141		 thisboard->name, iobase);
142#ifdef incomplete
143	if (irq)
144		pr_debug("irq %u\n", irq);
145#endif
146
147	if (iobase == 0) {
148		pr_err("io base address is zero!\n");
149		return -EINVAL;
150	}
151
152	dev->iobase = iobase;
153
154#ifdef incomplete
155	/* grab our IRQ */
156	dev->irq = irq;
157#endif
158
159	dev->board_name = thisboard->name;
160
161	if (alloc_subdevices(dev, 1) < 0)
162		return -ENOMEM;
163
164	/* 8255 dio */
165	s = dev->subdevices + 0;
166	subdev_8255_init(dev, s, NULL, dev->iobase);
167
168	return 0;
169};
170
171static int dio24_detach(struct comedi_device *dev)
172{
173	dev_info(dev->hw_dev, "comedi%d: ni_daq_dio24: remove\n", dev->minor);
174
175	if (dev->subdevices)
176		subdev_8255_cleanup(dev, dev->subdevices + 0);
177
178	if (thisboard->bustype != pcmcia_bustype && dev->iobase)
179		release_region(dev->iobase, DIO24_SIZE);
180	if (dev->irq)
181		free_irq(dev->irq, dev);
182
183	return 0;
184};
185
186static void dio24_config(struct pcmcia_device *link);
187static void dio24_release(struct pcmcia_device *link);
188static int dio24_cs_suspend(struct pcmcia_device *p_dev);
189static int dio24_cs_resume(struct pcmcia_device *p_dev);
190
191static int dio24_cs_attach(struct pcmcia_device *);
192static void dio24_cs_detach(struct pcmcia_device *);
193
194struct local_info_t {
195	struct pcmcia_device *link;
196	int stop;
197	struct bus_operations *bus;
198};
199
200static int dio24_cs_attach(struct pcmcia_device *link)
201{
202	struct local_info_t *local;
203
204	printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO - CS-attach!\n");
205
206	dev_dbg(&link->dev, "dio24_cs_attach()\n");
207
208	/* Allocate space for private device-specific data */
209	local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL);
210	if (!local)
211		return -ENOMEM;
212	local->link = link;
213	link->priv = local;
214
215	pcmcia_cur_dev = link;
216
217	dio24_config(link);
218
219	return 0;
220}				/* dio24_cs_attach */
221
222static void dio24_cs_detach(struct pcmcia_device *link)
223{
224
225	printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO - cs-detach!\n");
226
227	dev_dbg(&link->dev, "dio24_cs_detach\n");
228
229	((struct local_info_t *)link->priv)->stop = 1;
230	dio24_release(link);
231
232	/* This points to the parent local_info_t struct */
233	kfree(link->priv);
234
235}				/* dio24_cs_detach */
236
237static int dio24_pcmcia_config_loop(struct pcmcia_device *p_dev,
238				void *priv_data)
239{
240	if (p_dev->config_index == 0)
241		return -EINVAL;
242
243	return pcmcia_request_io(p_dev);
244}
245
246static void dio24_config(struct pcmcia_device *link)
247{
248	int ret;
249
250	printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO! - config\n");
251
252	dev_dbg(&link->dev, "dio24_config\n");
253
254	link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_AUDIO |
255		CONF_AUTO_SET_IO;
256
257	ret = pcmcia_loop_config(link, dio24_pcmcia_config_loop, NULL);
258	if (ret) {
259		dev_warn(&link->dev, "no configuration found\n");
260		goto failed;
261	}
262
263	if (!link->irq)
264		goto failed;
265
266	ret = pcmcia_enable_device(link);
267	if (ret)
268		goto failed;
269
270	return;
271
272failed:
273	printk(KERN_INFO "Fallo");
274	dio24_release(link);
275
276}				/* dio24_config */
277
278static void dio24_release(struct pcmcia_device *link)
279{
280	dev_dbg(&link->dev, "dio24_release\n");
281
282	pcmcia_disable_device(link);
283}				/* dio24_release */
284
285static int dio24_cs_suspend(struct pcmcia_device *link)
286{
287	struct local_info_t *local = link->priv;
288
289	/* Mark the device as stopped, to block IO until later */
290	local->stop = 1;
291	return 0;
292}				/* dio24_cs_suspend */
293
294static int dio24_cs_resume(struct pcmcia_device *link)
295{
296	struct local_info_t *local = link->priv;
297
298	local->stop = 0;
299	return 0;
300}				/* dio24_cs_resume */
301
302/*====================================================================*/
303
304static const struct pcmcia_device_id dio24_cs_ids[] = {
305	/* N.B. These IDs should match those in dio24_boards */
306	PCMCIA_DEVICE_MANF_CARD(0x010b, 0x475c),	/* daqcard-dio24 */
307	PCMCIA_DEVICE_NULL
308};
309
310MODULE_DEVICE_TABLE(pcmcia, dio24_cs_ids);
311MODULE_AUTHOR("Daniel Vecino Castel <dvecino@able.es>");
312MODULE_DESCRIPTION("Comedi driver for National Instruments "
313		   "PCMCIA DAQ-Card DIO-24");
314MODULE_LICENSE("GPL");
315
316struct pcmcia_driver dio24_cs_driver = {
317	.probe = dio24_cs_attach,
318	.remove = dio24_cs_detach,
319	.suspend = dio24_cs_suspend,
320	.resume = dio24_cs_resume,
321	.id_table = dio24_cs_ids,
322	.owner = THIS_MODULE,
323	.name = "ni_daq_dio24",
324};
325
326static int __init init_dio24_cs(void)
327{
328	printk("ni_daq_dio24: HOLA SOY YO!\n");
329	pcmcia_register_driver(&dio24_cs_driver);
330	return 0;
331}
332
333static void __exit exit_dio24_cs(void)
334{
335	pcmcia_unregister_driver(&dio24_cs_driver);
336}
337
338int __init init_module(void)
339{
340	int ret;
341
342	ret = init_dio24_cs();
343	if (ret < 0)
344		return ret;
345
346	return comedi_driver_register(&driver_dio24);
347}
348
349void __exit cleanup_module(void)
350{
351	exit_dio24_cs();
352	comedi_driver_unregister(&driver_dio24);
353}
354