2 comedi/drivers/das08_cs.c
5 COMEDI - Linux Control and Measurement Device Interface
6 Copyright (C) 2000 David A. Schleef <ds@schleef.org>
7 Copyright (C) 2001,2002,2003 Frank Mori Hess <fmhess@users.sourceforge.net>
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 *****************************************************************
28 Description: DAS-08 PCMCIA boards
29 Author: Warren Jasper, ds, Frank Hess
30 Devices: [ComputerBoards] PCM-DAS08 (pcm-das08)
33 This is the PCMCIA-specific support split off from the
36 Options (for pcm-das08):
39 Command support does not exist, but could be added for this board.
42 #include "../comedidev.h"
44 #include <linux/delay.h>
45 #include <linux/pci.h>
50 #include <pcmcia/cs_types.h>
51 #include <pcmcia/cs.h>
52 #include <pcmcia/cistpl.h>
53 #include <pcmcia/ds.h>
55 static struct pcmcia_device *cur_dev = NULL;
57 #define thisboard ((const struct das08_board_struct *)dev->board_ptr)
59 static int das08_cs_attach(struct comedi_device *dev, struct comedi_devconfig *it);
61 static struct comedi_driver driver_das08_cs = {
62 .driver_name = "das08_cs",
63 .module = THIS_MODULE,
64 .attach = das08_cs_attach,
65 .detach = das08_common_detach,
66 .board_name = &das08_cs_boards[0].name,
67 .num_names = sizeof(das08_cs_boards) /
68 sizeof(struct das08_board_struct),
69 .offset = sizeof(struct das08_board_struct),
72 static int das08_cs_attach(struct comedi_device *dev, struct comedi_devconfig *it)
76 struct pcmcia_device *link = cur_dev; /* XXX hack */
78 ret = alloc_private(dev, sizeof(struct das08_private_struct));
82 printk("comedi%d: das08_cs: ", dev->minor);
83 /* deal with a pci board */
85 if (thisboard->bustype == pcmcia) {
87 printk(" no pcmcia cards found\n");
90 iobase = link->io.BasePort1;
92 printk(" bug! board does not have PCMCIA bustype\n");
98 return das08_common_attach(dev, iobase);
101 /*======================================================================
103 The following pcmcia code for the pcm-das08 is adapted from the
104 dummy_cs.c driver of the Linux PCMCIA Card Services package.
106 The initial developer of the original code is David A. Hinds
107 <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
108 are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
110 ======================================================================*/
113 All the PCMCIA modules use PCMCIA_DEBUG to control debugging. If
114 you do not define PCMCIA_DEBUG at all, all the debug code will be
115 left out. If you compile with PCMCIA_DEBUG=0, the debug code will
116 be present but disabled -- but it can then be enabled for specific
117 modules at load time with a 'pc_debug=#' option to insmod.
121 static int pc_debug = PCMCIA_DEBUG;
122 module_param(pc_debug, int, 0644);
123 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
124 static const char *version =
125 "das08.c pcmcia code (Frank Hess), modified from dummy_cs.c 1.31 2001/08/24 12:13:13 (David Hinds)";
127 #define DEBUG(n, args...)
130 /*====================================================================*/
131 static void das08_pcmcia_config(struct pcmcia_device *link);
132 static void das08_pcmcia_release(struct pcmcia_device *link);
133 static int das08_pcmcia_suspend(struct pcmcia_device *p_dev);
134 static int das08_pcmcia_resume(struct pcmcia_device *p_dev);
137 The attach() and detach() entry points are used to create and destroy
138 "instances" of the driver, where each instance represents everything
139 needed to manage one actual PCMCIA card.
142 static int das08_pcmcia_attach(struct pcmcia_device *);
143 static void das08_pcmcia_detach(struct pcmcia_device *);
146 You'll also need to prototype all the functions that will actually
147 be used to talk to your device. See 'memory_cs' for a good example
148 of a fully self-sufficient driver; the other drivers rely more or
149 less on other parts of the kernel.
153 The dev_info variable is the "key" that is used to match up this
154 device driver with appropriate cards, through the card configuration
158 static const dev_info_t dev_info = "pcm-das08";
160 struct local_info_t {
161 struct pcmcia_device *link;
164 struct bus_operations *bus;
167 /*======================================================================
169 das08_pcmcia_attach() creates an "instance" of the driver, allocating
170 local data structures for one device. The device is registered
173 The dev_link structure is initialized, but we don't actually
174 configure the card at this point -- we wait until we receive a
175 card insertion event.
177 ======================================================================*/
179 static int das08_pcmcia_attach(struct pcmcia_device *link)
181 struct local_info_t *local;
183 DEBUG(0, "das08_pcmcia_attach()\n");
185 /* Allocate space for private device-specific data */
186 local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL);
192 /* Interrupt setup */
193 link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
194 link->irq.IRQInfo1 = IRQ_LEVEL_ID;
195 link->irq.Handler = NULL;
198 General socket configuration defaults can go here. In this
199 client, we assume very little, and rely on the CIS for almost
200 everything. In most clients, many details (i.e., number, sizes,
201 and attributes of IO windows) are fixed by the nature of the
202 device, and can be hard-wired here.
204 link->conf.Attributes = 0;
205 link->conf.IntType = INT_MEMORY_AND_IO;
209 das08_pcmcia_config(link);
212 } /* das08_pcmcia_attach */
214 /*======================================================================
216 This deletes a driver "instance". The device is de-registered
217 with Card Services. If it has been released, all local data
218 structures are freed. Otherwise, the structures will be freed
219 when the device is released.
221 ======================================================================*/
223 static void das08_pcmcia_detach(struct pcmcia_device *link)
226 DEBUG(0, "das08_pcmcia_detach(0x%p)\n", link);
228 if (link->dev_node) {
229 ((struct local_info_t *) link->priv)->stop = 1;
230 das08_pcmcia_release(link);
233 /* This points to the parent struct local_info_t struct */
237 } /* das08_pcmcia_detach */
239 /*======================================================================
241 das08_pcmcia_config() is scheduled to run after a CARD_INSERTION event
242 is received, to configure the PCMCIA socket, and to make the
243 device available to the system.
245 ======================================================================*/
247 static void das08_pcmcia_config(struct pcmcia_device *link)
249 struct local_info_t *dev = link->priv;
252 int last_fn, last_ret;
254 cistpl_cftable_entry_t dflt = { 0 };
256 DEBUG(0, "das08_pcmcia_config(0x%p)\n", link);
259 This reads the card's CONFIG tuple to find its configuration
262 tuple.DesiredTuple = CISTPL_CONFIG;
263 tuple.Attributes = 0;
264 tuple.TupleData = buf;
265 tuple.TupleDataMax = sizeof(buf);
266 tuple.TupleOffset = 0;
267 last_fn = GetFirstTuple;
269 last_ret = pcmcia_get_first_tuple(link, &tuple);
273 last_fn = GetTupleData;
275 last_ret = pcmcia_get_tuple_data(link, &tuple);
279 last_fn = ParseTuple;
281 last_ret = pcmcia_parse_tuple(&tuple, &parse);
285 link->conf.ConfigBase = parse.config.base;
286 link->conf.Present = parse.config.rmask[0];
289 In this loop, we scan the CIS for configuration table entries,
290 each of which describes a valid card configuration, including
291 voltage, IO window, memory window, and interrupt settings.
293 We make no assumptions about the card to be configured: we use
294 just the information available in the CIS. In an ideal world,
295 this would work for any PCMCIA card, but it requires a complete
296 and accurate CIS. In practice, a driver usually "knows" most of
297 these things without consulting the CIS, and most client drivers
298 will only use the CIS to fill in implementation-defined details.
300 tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
301 last_fn = GetFirstTuple;
303 last_ret = pcmcia_get_first_tuple(link, &tuple);
308 cistpl_cftable_entry_t *cfg = &(parse.cftable_entry);
310 last_ret = pcmcia_get_tuple_data(link, &tuple);
314 last_ret = pcmcia_parse_tuple(&tuple, &parse);
318 if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
322 link->conf.ConfigIndex = cfg->index;
324 /* Does this card need audio output? */
325 /* if (cfg->flags & CISTPL_CFTABLE_AUDIO) {
326 link->conf.Attributes |= CONF_ENABLE_SPKR;
327 link->conf.Status = CCSR_AUDIO_ENA;
330 /* Do we need to allocate an interrupt? */
331 if (cfg->irq.IRQInfo1 || dflt.irq.IRQInfo1)
332 link->conf.Attributes |= CONF_ENABLE_IRQ;
334 /* IO window settings */
335 link->io.NumPorts1 = link->io.NumPorts2 = 0;
336 if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
337 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
338 link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
339 if (!(io->flags & CISTPL_IO_8BIT))
340 link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
341 if (!(io->flags & CISTPL_IO_16BIT))
342 link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
343 link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
344 link->io.BasePort1 = io->win[0].base;
345 link->io.NumPorts1 = io->win[0].len;
347 link->io.Attributes2 = link->io.Attributes1;
348 link->io.BasePort2 = io->win[1].base;
349 link->io.NumPorts2 = io->win[1].len;
351 /* This reserves IO space but doesn't actually enable it */
352 if (pcmcia_request_io(link, &link->io) != 0)
356 /* If we got this far, we're cool! */
360 last_fn = GetNextTuple;
362 last_ret = pcmcia_get_next_tuple(link, &tuple);
367 if (link->conf.Attributes & CONF_ENABLE_IRQ) {
368 last_fn = RequestIRQ;
369 last_ret = pcmcia_request_irq(link, &link->irq);
375 This actually configures the PCMCIA socket -- setting up
376 the I/O windows and the interrupt mapping, and putting the
377 card and host interface into "Memory and IO" mode.
379 last_fn = RequestConfiguration;
380 last_ret = pcmcia_request_configuration(link, &link->conf);
385 At this point, the dev_node_t structure(s) need to be
386 initialized and arranged in a linked list at link->dev.
388 sprintf(dev->node.dev_name, "pcm-das08");
389 dev->node.major = dev->node.minor = 0;
390 link->dev_node = &dev->node;
392 /* Finally, report what we've done */
393 printk(KERN_INFO "%s: index 0x%02x",
394 dev->node.dev_name, link->conf.ConfigIndex);
395 if (link->conf.Attributes & CONF_ENABLE_IRQ)
396 printk(", irq %u", link->irq.AssignedIRQ);
397 if (link->io.NumPorts1)
398 printk(", io 0x%04x-0x%04x", link->io.BasePort1,
399 link->io.BasePort1 + link->io.NumPorts1 - 1);
400 if (link->io.NumPorts2)
401 printk(" & 0x%04x-0x%04x", link->io.BasePort2,
402 link->io.BasePort2 + link->io.NumPorts2 - 1);
408 cs_error(link, last_fn, last_ret);
409 das08_pcmcia_release(link);
411 } /* das08_pcmcia_config */
413 /*======================================================================
415 After a card is removed, das08_pcmcia_release() will unregister the
416 device, and release the PCMCIA configuration. If the device is
417 still open, this will be postponed until it is closed.
419 ======================================================================*/
421 static void das08_pcmcia_release(struct pcmcia_device *link)
423 DEBUG(0, "das08_pcmcia_release(0x%p)\n", link);
424 pcmcia_disable_device(link);
425 } /* das08_pcmcia_release */
427 /*======================================================================
429 The card status event handler. Mostly, this schedules other
430 stuff to run after an event is received.
432 When a CARD_REMOVAL event is received, we immediately set a
433 private flag to block future accesses to this device. All the
434 functions that actually access the device should check this flag
435 to make sure the card is still present.
437 ======================================================================*/
439 static int das08_pcmcia_suspend(struct pcmcia_device *link)
441 struct local_info_t *local = link->priv;
442 /* Mark the device as stopped, to block IO until later */
446 } /* das08_pcmcia_suspend */
448 static int das08_pcmcia_resume(struct pcmcia_device *link)
450 struct local_info_t *local = link->priv;
454 } /* das08_pcmcia_resume */
456 /*====================================================================*/
458 static struct pcmcia_device_id das08_cs_id_table[] = {
459 PCMCIA_DEVICE_MANF_CARD(0x01c5, 0x4001),
463 MODULE_DEVICE_TABLE(pcmcia, das08_cs_id_table);
465 struct pcmcia_driver das08_cs_driver = {
466 .probe = das08_pcmcia_attach,
467 .remove = das08_pcmcia_detach,
468 .suspend = das08_pcmcia_suspend,
469 .resume = das08_pcmcia_resume,
470 .id_table = das08_cs_id_table,
471 .owner = THIS_MODULE,
477 static int __init init_das08_pcmcia_cs(void)
479 DEBUG(0, "%s\n", version);
480 pcmcia_register_driver(&das08_cs_driver);
484 static void __exit exit_das08_pcmcia_cs(void)
486 DEBUG(0, "das08_pcmcia_cs: unloading\n");
487 pcmcia_unregister_driver(&das08_cs_driver);
490 static int __init das08_cs_init_module(void)
494 ret = init_das08_pcmcia_cs();
498 return comedi_driver_register(&driver_das08_cs);
501 static void __exit das08_cs_exit_module(void)
503 exit_das08_pcmcia_cs();
504 comedi_driver_unregister(&driver_das08_cs);
507 MODULE_LICENSE("GPL");
508 module_init(das08_cs_init_module);
509 module_exit(das08_cs_exit_module);