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_types.h>
52 #include <pcmcia/cs.h>
53 #include <pcmcia/cistpl.h>
54 #include <pcmcia/cisreg.h>
55 #include <pcmcia/ds.h>
57 static struct pcmcia_device *pcmcia_cur_dev = NULL;
59 #define DIO24_SIZE 4 /* size of io region used by board */
61 static int dio24_attach(struct comedi_device *dev, struct comedi_devconfig *it);
62 static int dio24_detach(struct comedi_device *dev);
64 enum dio24_bustype { pcmcia_bustype };
66 struct dio24_board_struct {
68 int device_id; /* device id for pcmcia board */
69 enum dio24_bustype bustype; /* PCMCIA */
70 int have_dio; /* have 8255 chip */
71 /* function pointers so we can use inb/outb or readb/writeb as appropriate */
72 unsigned int (*read_byte) (unsigned int address);
73 void (*write_byte) (unsigned int byte, unsigned int address);
76 static const struct dio24_board_struct dio24_boards[] = {
78 .name = "daqcard-dio24",
79 .device_id = 0x475c, /* 0x10b is manufacturer id, 0x475c is device id */
80 .bustype = pcmcia_bustype,
84 .name = "ni_daq_dio24",
85 .device_id = 0x475c, /* 0x10b is manufacturer id, 0x475c is device id */
86 .bustype = pcmcia_bustype,
92 * Useful for shorthand access to the particular board structure
94 #define thisboard ((const struct dio24_board_struct *)dev->board_ptr)
96 struct dio24_private {
98 int data; /* number of data points left to be taken */
101 #define devpriv ((struct dio24_private *)dev->private)
103 static struct comedi_driver driver_dio24 = {
104 .driver_name = "ni_daq_dio24",
105 .module = THIS_MODULE,
106 .attach = dio24_attach,
107 .detach = dio24_detach,
108 .num_names = ARRAY_SIZE(dio24_boards),
109 .board_name = &dio24_boards[0].name,
110 .offset = sizeof(struct dio24_board_struct),
113 static int dio24_attach(struct comedi_device *dev, struct comedi_devconfig *it)
115 struct comedi_subdevice *s;
116 unsigned long iobase = 0;
118 unsigned int irq = 0;
120 struct pcmcia_device *link;
122 /* allocate and initialize dev->private */
123 if (alloc_private(dev, sizeof(struct dio24_private)) < 0)
126 /* get base address, irq etc. based on bustype */
127 switch (thisboard->bustype) {
129 link = pcmcia_cur_dev; /* XXX hack */
132 iobase = link->io.BasePort1;
138 printk("bug! couldn't determine board type\n");
142 printk("comedi%d: ni_daq_dio24: %s, io 0x%lx", dev->minor,
143 thisboard->name, iobase);
146 printk(", irq %u", irq);
153 printk("io base address is zero!\n");
157 dev->iobase = iobase;
164 dev->board_name = thisboard->name;
166 if (alloc_subdevices(dev, 1) < 0)
170 s = dev->subdevices + 0;
171 subdev_8255_init(dev, s, NULL, dev->iobase);
176 static int dio24_detach(struct comedi_device *dev)
178 printk("comedi%d: ni_daq_dio24: remove\n", dev->minor);
181 subdev_8255_cleanup(dev, dev->subdevices + 0);
183 if (thisboard->bustype != pcmcia_bustype && dev->iobase)
184 release_region(dev->iobase, DIO24_SIZE);
186 free_irq(dev->irq, dev);
191 /* PCMCIA crap -- watch your words! */
193 static void dio24_config(struct pcmcia_device *link);
194 static void dio24_release(struct pcmcia_device *link);
195 static int dio24_cs_suspend(struct pcmcia_device *p_dev);
196 static int dio24_cs_resume(struct pcmcia_device *p_dev);
199 The attach() and detach() entry points are used to create and destroy
200 "instances" of the driver, where each instance represents everything
201 needed to manage one actual PCMCIA card.
204 static int dio24_cs_attach(struct pcmcia_device *);
205 static void dio24_cs_detach(struct pcmcia_device *);
208 You'll also need to prototype all the functions that will actually
209 be used to talk to your device. See 'memory_cs' for a good example
210 of a fully self-sufficient driver; the other drivers rely more or
211 less on other parts of the kernel.
215 The dev_info variable is the "key" that is used to match up this
216 device driver with appropriate cards, through the card configuration
220 static const dev_info_t dev_info = "ni_daq_dio24";
222 struct local_info_t {
223 struct pcmcia_device *link;
225 struct bus_operations *bus;
228 /*======================================================================
230 dio24_cs_attach() creates an "instance" of the driver, allocating
231 local data structures for one device. The device is registered
234 The dev_link structure is initialized, but we don't actually
235 configure the card at this point -- we wait until we receive a
236 card insertion event.
238 ======================================================================*/
240 static int dio24_cs_attach(struct pcmcia_device *link)
242 struct local_info_t *local;
244 printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO - CS-attach!\n");
246 dev_dbg(&link->dev, "dio24_cs_attach()\n");
248 /* Allocate space for private device-specific data */
249 local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL);
256 General socket configuration defaults can go here. In this
257 client, we assume very little, and rely on the CIS for almost
258 everything. In most clients, many details (i.e., number, sizes,
259 and attributes of IO windows) are fixed by the nature of the
260 device, and can be hard-wired here.
262 link->conf.Attributes = 0;
263 link->conf.IntType = INT_MEMORY_AND_IO;
265 pcmcia_cur_dev = link;
270 } /* dio24_cs_attach */
272 /*======================================================================
274 This deletes a driver "instance". The device is de-registered
275 with Card Services. If it has been released, all local data
276 structures are freed. Otherwise, the structures will be freed
277 when the device is released.
279 ======================================================================*/
281 static void dio24_cs_detach(struct pcmcia_device *link)
284 printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO - cs-detach!\n");
286 dev_dbg(&link->dev, "dio24_cs_detach\n");
288 ((struct local_info_t *)link->priv)->stop = 1;
291 /* This points to the parent local_info_t struct */
294 } /* dio24_cs_detach */
296 /*======================================================================
298 dio24_config() is scheduled to run after a CARD_INSERTION event
299 is received, to configure the PCMCIA socket, and to make the
300 device available to the system.
302 ======================================================================*/
304 static int dio24_pcmcia_config_loop(struct pcmcia_device *p_dev,
305 cistpl_cftable_entry_t *cfg,
306 cistpl_cftable_entry_t *dflt,
310 win_req_t *req = priv_data;
316 /* Does this card need audio output? */
317 if (cfg->flags & CISTPL_CFTABLE_AUDIO) {
318 p_dev->conf.Attributes |= CONF_ENABLE_SPKR;
319 p_dev->conf.Status = CCSR_AUDIO_ENA;
322 /* Do we need to allocate an interrupt? */
323 p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
325 /* IO window settings */
326 p_dev->io.NumPorts1 = p_dev->io.NumPorts2 = 0;
327 if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
328 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
329 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
330 if (!(io->flags & CISTPL_IO_8BIT))
331 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
332 if (!(io->flags & CISTPL_IO_16BIT))
333 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
334 p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
335 p_dev->io.BasePort1 = io->win[0].base;
336 p_dev->io.NumPorts1 = io->win[0].len;
338 p_dev->io.Attributes2 = p_dev->io.Attributes1;
339 p_dev->io.BasePort2 = io->win[1].base;
340 p_dev->io.NumPorts2 = io->win[1].len;
342 /* This reserves IO space but doesn't actually enable it */
343 if (pcmcia_request_io(p_dev, &p_dev->io) != 0)
347 if ((cfg->mem.nwin > 0) || (dflt->mem.nwin > 0)) {
349 (cfg->mem.nwin) ? &cfg->mem : &dflt->mem;
350 req->Attributes = WIN_DATA_WIDTH_16 | WIN_MEMORY_TYPE_CM;
351 req->Attributes |= WIN_ENABLE;
352 req->Base = mem->win[0].host_addr;
353 req->Size = mem->win[0].len;
354 if (req->Size < 0x1000)
356 req->AccessSpeed = 0;
357 if (pcmcia_request_window(p_dev, req, &p_dev->win))
360 map.CardOffset = mem->win[0].card_addr;
361 if (pcmcia_map_mem_page(p_dev, p_dev->win, &map))
364 /* If we got this far, we're cool! */
368 static void dio24_config(struct pcmcia_device *link)
373 printk(KERN_INFO "ni_daq_dio24: HOLA SOY YO! - config\n");
375 dev_dbg(&link->dev, "dio24_config\n");
377 ret = pcmcia_loop_config(link, dio24_pcmcia_config_loop, &req);
379 dev_warn(&link->dev, "no configuration found\n");
387 This actually configures the PCMCIA socket -- setting up
388 the I/O windows and the interrupt mapping, and putting the
389 card and host interface into "Memory and IO" mode.
391 ret = pcmcia_request_configuration(link, &link->conf);
395 /* Finally, report what we've done */
396 dev_info(&link->dev, "index 0x%02x", link->conf.ConfigIndex);
397 if (link->conf.Attributes & CONF_ENABLE_IRQ)
398 printk(", irq %d", link->irq);
399 if (link->io.NumPorts1)
400 printk(", io 0x%04x-0x%04x", link->io.BasePort1,
401 link->io.BasePort1 + link->io.NumPorts1 - 1);
402 if (link->io.NumPorts2)
403 printk(" & 0x%04x-0x%04x", link->io.BasePort2,
404 link->io.BasePort2 + link->io.NumPorts2 - 1);
406 printk(", mem 0x%06lx-0x%06lx", req.Base,
407 req.Base + req.Size - 1);
413 printk(KERN_INFO "Fallo");
418 static void dio24_release(struct pcmcia_device *link)
420 dev_dbg(&link->dev, "dio24_release\n");
422 pcmcia_disable_device(link);
423 } /* dio24_release */
425 /*======================================================================
427 The card status event handler. Mostly, this schedules other
428 stuff to run after an event is received.
430 When a CARD_REMOVAL event is received, we immediately set a
431 private flag to block future accesses to this device. All the
432 functions that actually access the device should check this flag
433 to make sure the card is still present.
435 ======================================================================*/
437 static int dio24_cs_suspend(struct pcmcia_device *link)
439 struct local_info_t *local = link->priv;
441 /* Mark the device as stopped, to block IO until later */
444 } /* dio24_cs_suspend */
446 static int dio24_cs_resume(struct pcmcia_device *link)
448 struct local_info_t *local = link->priv;
452 } /* dio24_cs_resume */
454 /*====================================================================*/
456 static struct pcmcia_device_id dio24_cs_ids[] = {
457 /* N.B. These IDs should match those in dio24_boards */
458 PCMCIA_DEVICE_MANF_CARD(0x010b, 0x475c), /* daqcard-dio24 */
462 MODULE_DEVICE_TABLE(pcmcia, dio24_cs_ids);
463 MODULE_AUTHOR("Daniel Vecino Castel <dvecino@able.es>");
464 MODULE_DESCRIPTION("Comedi driver for National Instruments "
465 "PCMCIA DAQ-Card DIO-24");
466 MODULE_LICENSE("GPL");
468 struct pcmcia_driver dio24_cs_driver = {
469 .probe = dio24_cs_attach,
470 .remove = dio24_cs_detach,
471 .suspend = dio24_cs_suspend,
472 .resume = dio24_cs_resume,
473 .id_table = dio24_cs_ids,
474 .owner = THIS_MODULE,
480 static int __init init_dio24_cs(void)
482 printk("ni_daq_dio24: HOLA SOY YO!\n");
483 pcmcia_register_driver(&dio24_cs_driver);
487 static void __exit exit_dio24_cs(void)
489 pcmcia_unregister_driver(&dio24_cs_driver);
492 int __init init_module(void)
496 ret = init_dio24_cs();
500 return comedi_driver_register(&driver_dio24);
503 void __exit cleanup_module(void)
506 comedi_driver_unregister(&driver_dio24);