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>
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.
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.
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.
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.
26 ************************************************************************
30 Description: National Instruments PCMCIA DAQ-Card DIO-24
31 Author: Daniel Vecino Castel <dvecino@able.es>
32 Devices: [National Instruments] PCMCIA DAQ-Card DIO-24 (ni_daq_dio24)
34 Updated: Thu, 07 Nov 2002 21:53:06 -0800
36 This is just a wrapper around the 8255.o driver to properly handle
40 /* #define LABPC_DEBUG *//* enable debugging messages */
43 #include <linux/interrupt.h>
44 #include <linux/slab.h>
45 #include "../comedidev.h"
47 #include <linux/ioport.h>
51 #include <pcmcia/cs.h>
52 #include <pcmcia/cistpl.h>
53 #include <pcmcia/cisreg.h>
54 #include <pcmcia/ds.h>
56 static struct pcmcia_device *pcmcia_cur_dev = NULL;
58 #define DIO24_SIZE 4 /* size of io region used by board */
60 static int dio24_attach(struct comedi_device *dev, struct comedi_devconfig *it);
61 static int dio24_detach(struct comedi_device *dev);
63 enum dio24_bustype { pcmcia_bustype };
65 struct dio24_board_struct {
67 int device_id; /* device id for pcmcia board */
68 enum dio24_bustype bustype; /* PCMCIA */
69 int have_dio; /* have 8255 chip */
70 /* function pointers so we can use inb/outb or readb/writeb as appropriate */
71 unsigned int (*read_byte) (unsigned int address);
72 void (*write_byte) (unsigned int byte, unsigned int address);
75 static const struct dio24_board_struct dio24_boards[] = {
77 .name = "daqcard-dio24",
78 .device_id = 0x475c, /* 0x10b is manufacturer id, 0x475c is device id */
79 .bustype = pcmcia_bustype,
83 .name = "ni_daq_dio24",
84 .device_id = 0x475c, /* 0x10b is manufacturer id, 0x475c is device id */
85 .bustype = pcmcia_bustype,
91 * Useful for shorthand access to the particular board structure
93 #define thisboard ((const struct dio24_board_struct *)dev->board_ptr)
95 struct dio24_private {
97 int data; /* number of data points left to be taken */
100 #define devpriv ((struct dio24_private *)dev->private)
102 static struct comedi_driver driver_dio24 = {
103 .driver_name = "ni_daq_dio24",
104 .module = THIS_MODULE,
105 .attach = dio24_attach,
106 .detach = dio24_detach,
107 .num_names = ARRAY_SIZE(dio24_boards),
108 .board_name = &dio24_boards[0].name,
109 .offset = sizeof(struct dio24_board_struct),
112 static int dio24_attach(struct comedi_device *dev, struct comedi_devconfig *it)
114 struct comedi_subdevice *s;
115 unsigned long iobase = 0;
117 unsigned int irq = 0;
119 struct pcmcia_device *link;
121 /* allocate and initialize dev->private */
122 if (alloc_private(dev, sizeof(struct dio24_private)) < 0)
125 /* get base address, irq etc. based on bustype */
126 switch (thisboard->bustype) {
128 link = pcmcia_cur_dev; /* XXX hack */
131 iobase = link->resource[0]->start;
137 printk("bug! couldn't determine board type\n");
141 printk("comedi%d: ni_daq_dio24: %s, io 0x%lx", dev->minor,
142 thisboard->name, iobase);
145 printk(", irq %u", irq);
152 printk("io base address is zero!\n");
156 dev->iobase = iobase;
163 dev->board_name = thisboard->name;
165 if (alloc_subdevices(dev, 1) < 0)
169 s = dev->subdevices + 0;
170 subdev_8255_init(dev, s, NULL, dev->iobase);
175 static int dio24_detach(struct comedi_device *dev)
177 printk("comedi%d: ni_daq_dio24: remove\n", dev->minor);
180 subdev_8255_cleanup(dev, dev->subdevices + 0);
182 if (thisboard->bustype != pcmcia_bustype && dev->iobase)
183 release_region(dev->iobase, DIO24_SIZE);
185 free_irq(dev->irq, dev);
190 /* PCMCIA crap -- watch your words! */
192 static void dio24_config(struct pcmcia_device *link);
193 static void dio24_release(struct pcmcia_device *link);
194 static int dio24_cs_suspend(struct pcmcia_device *p_dev);
195 static int dio24_cs_resume(struct pcmcia_device *p_dev);
198 The attach() and detach() entry points are used to create and destroy
199 "instances" of the driver, where each instance represents everything
200 needed to manage one actual PCMCIA card.
203 static int dio24_cs_attach(struct pcmcia_device *);
204 static void dio24_cs_detach(struct pcmcia_device *);
207 You'll also need to prototype all the functions that will actually
208 be used to talk to your device. See 'memory_cs' for a good example
209 of a fully self-sufficient driver; the other drivers rely more or
210 less on other parts of the kernel.
213 struct local_info_t {
214 struct pcmcia_device *link;
216 struct bus_operations *bus;
219 /*======================================================================
221 dio24_cs_attach() creates an "instance" of the driver, allocating
222 local data structures for one device. The device is registered
225 The dev_link structure is initialized, but we don't actually
226 configure the card at this point -- we wait until we receive a
227 card insertion event.
229 ======================================================================*/
231 static int dio24_cs_attach(struct pcmcia_device *link)
233 struct local_info_t *local;
235 printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO - CS-attach!\n");
237 dev_dbg(&link->dev, "dio24_cs_attach()\n");
239 /* Allocate space for private device-specific data */
240 local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL);
247 General socket configuration defaults can go here. In this
248 client, we assume very little, and rely on the CIS for almost
249 everything. In most clients, many details (i.e., number, sizes,
250 and attributes of IO windows) are fixed by the nature of the
251 device, and can be hard-wired here.
253 link->conf.Attributes = 0;
255 pcmcia_cur_dev = link;
260 } /* dio24_cs_attach */
262 /*======================================================================
264 This deletes a driver "instance". The device is de-registered
265 with Card Services. If it has been released, all local data
266 structures are freed. Otherwise, the structures will be freed
267 when the device is released.
269 ======================================================================*/
271 static void dio24_cs_detach(struct pcmcia_device *link)
274 printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO - cs-detach!\n");
276 dev_dbg(&link->dev, "dio24_cs_detach\n");
278 ((struct local_info_t *)link->priv)->stop = 1;
281 /* This points to the parent local_info_t struct */
284 } /* dio24_cs_detach */
286 /*======================================================================
288 dio24_config() is scheduled to run after a CARD_INSERTION event
289 is received, to configure the PCMCIA socket, and to make the
290 device available to the system.
292 ======================================================================*/
294 static int dio24_pcmcia_config_loop(struct pcmcia_device *p_dev,
295 cistpl_cftable_entry_t *cfg,
296 cistpl_cftable_entry_t *dflt,
303 /* Does this card need audio output? */
304 if (cfg->flags & CISTPL_CFTABLE_AUDIO)
305 p_dev->conf.Attributes |= CONF_ENABLE_SPKR;
307 /* Do we need to allocate an interrupt? */
308 p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
310 /* IO window settings */
311 p_dev->resource[0]->end = p_dev->resource[1]->end = 0;
312 if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
313 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
314 p_dev->io_lines = io->flags & CISTPL_IO_LINES_MASK;
315 p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
316 p_dev->resource[0]->flags |=
317 pcmcia_io_cfg_data_width(io->flags);
318 p_dev->resource[0]->start = io->win[0].base;
319 p_dev->resource[0]->end = io->win[0].len;
321 p_dev->resource[1]->flags = p_dev->resource[0]->flags;
322 p_dev->resource[1]->start = io->win[1].base;
323 p_dev->resource[1]->end = io->win[1].len;
325 /* This reserves IO space but doesn't actually enable it */
326 if (pcmcia_request_io(p_dev) != 0)
330 /* If we got this far, we're cool! */
334 static void dio24_config(struct pcmcia_device *link)
338 printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO! - config\n");
340 dev_dbg(&link->dev, "dio24_config\n");
342 ret = pcmcia_loop_config(link, dio24_pcmcia_config_loop, NULL);
344 dev_warn(&link->dev, "no configuration found\n");
352 This actually configures the PCMCIA socket -- setting up
353 the I/O windows and the interrupt mapping, and putting the
354 card and host interface into "Memory and IO" mode.
356 ret = pcmcia_request_configuration(link, &link->conf);
360 /* Finally, report what we've done */
361 dev_info(&link->dev, "index 0x%02x", link->conf.ConfigIndex);
362 if (link->conf.Attributes & CONF_ENABLE_IRQ)
363 printk(", irq %d", link->irq);
364 if (link->resource[0])
365 printk(" & %pR", link->resource[0]);
366 if (link->resource[1])
367 printk(" & %pR", link->resource[1]);
373 printk(KERN_INFO "Fallo");
378 static void dio24_release(struct pcmcia_device *link)
380 dev_dbg(&link->dev, "dio24_release\n");
382 pcmcia_disable_device(link);
383 } /* dio24_release */
385 /*======================================================================
387 The card status event handler. Mostly, this schedules other
388 stuff to run after an event is received.
390 When a CARD_REMOVAL event is received, we immediately set a
391 private flag to block future accesses to this device. All the
392 functions that actually access the device should check this flag
393 to make sure the card is still present.
395 ======================================================================*/
397 static int dio24_cs_suspend(struct pcmcia_device *link)
399 struct local_info_t *local = link->priv;
401 /* Mark the device as stopped, to block IO until later */
404 } /* dio24_cs_suspend */
406 static int dio24_cs_resume(struct pcmcia_device *link)
408 struct local_info_t *local = link->priv;
412 } /* dio24_cs_resume */
414 /*====================================================================*/
416 static struct pcmcia_device_id dio24_cs_ids[] = {
417 /* N.B. These IDs should match those in dio24_boards */
418 PCMCIA_DEVICE_MANF_CARD(0x010b, 0x475c), /* daqcard-dio24 */
422 MODULE_DEVICE_TABLE(pcmcia, dio24_cs_ids);
423 MODULE_AUTHOR("Daniel Vecino Castel <dvecino@able.es>");
424 MODULE_DESCRIPTION("Comedi driver for National Instruments "
425 "PCMCIA DAQ-Card DIO-24");
426 MODULE_LICENSE("GPL");
428 struct pcmcia_driver dio24_cs_driver = {
429 .probe = dio24_cs_attach,
430 .remove = dio24_cs_detach,
431 .suspend = dio24_cs_suspend,
432 .resume = dio24_cs_resume,
433 .id_table = dio24_cs_ids,
434 .owner = THIS_MODULE,
436 .name = "ni_daq_dio24",
440 static int __init init_dio24_cs(void)
442 printk("ni_daq_dio24: HOLA SOY YO!\n");
443 pcmcia_register_driver(&dio24_cs_driver);
447 static void __exit exit_dio24_cs(void)
449 pcmcia_unregister_driver(&dio24_cs_driver);
452 int __init init_module(void)
456 ret = init_dio24_cs();
460 return comedi_driver_register(&driver_dio24);
463 void __exit cleanup_module(void)
466 comedi_driver_unregister(&driver_dio24);