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,
60 struct comedi_devconfig *it);
62 static struct comedi_driver driver_das08_cs = {
63 .driver_name = "das08_cs",
64 .module = THIS_MODULE,
65 .attach = das08_cs_attach,
66 .detach = das08_common_detach,
67 .board_name = &das08_cs_boards[0].name,
68 .num_names = ARRAY_SIZE(das08_cs_boards),
69 .offset = sizeof(struct das08_board_struct),
72 static int das08_cs_attach(struct comedi_device *dev,
73 struct comedi_devconfig *it)
77 struct pcmcia_device *link = cur_dev; /* XXX hack */
79 ret = alloc_private(dev, sizeof(struct das08_private_struct));
83 printk("comedi%d: das08_cs: ", dev->minor);
84 /* deal with a pci board */
86 if (thisboard->bustype == pcmcia) {
88 printk(" no pcmcia cards found\n");
91 iobase = link->io.BasePort1;
93 printk(" bug! board does not have PCMCIA bustype\n");
99 return das08_common_attach(dev, iobase);
102 /*======================================================================
104 The following pcmcia code for the pcm-das08 is adapted from the
105 dummy_cs.c driver of the Linux PCMCIA Card Services package.
107 The initial developer of the original code is David A. Hinds
108 <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
109 are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
111 ======================================================================*/
114 All the PCMCIA modules use PCMCIA_DEBUG to control debugging. If
115 you do not define PCMCIA_DEBUG at all, all the debug code will be
116 left out. If you compile with PCMCIA_DEBUG=0, the debug code will
117 be present but disabled -- but it can then be enabled for specific
118 modules at load time with a 'pc_debug=#' option to insmod.
122 static int pc_debug = PCMCIA_DEBUG;
123 module_param(pc_debug, int, 0644);
124 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args)
125 static const char *version =
126 "das08.c pcmcia code (Frank Hess), modified from dummy_cs.c 1.31 2001/08/24 12:13:13 (David Hinds)";
128 #define DEBUG(n, args...)
131 /*====================================================================*/
132 static void das08_pcmcia_config(struct pcmcia_device *link);
133 static void das08_pcmcia_release(struct pcmcia_device *link);
134 static int das08_pcmcia_suspend(struct pcmcia_device *p_dev);
135 static int das08_pcmcia_resume(struct pcmcia_device *p_dev);
138 The attach() and detach() entry points are used to create and destroy
139 "instances" of the driver, where each instance represents everything
140 needed to manage one actual PCMCIA card.
143 static int das08_pcmcia_attach(struct pcmcia_device *);
144 static void das08_pcmcia_detach(struct pcmcia_device *);
147 You'll also need to prototype all the functions that will actually
148 be used to talk to your device. See 'memory_cs' for a good example
149 of a fully self-sufficient driver; the other drivers rely more or
150 less on other parts of the kernel.
154 The dev_info variable is the "key" that is used to match up this
155 device driver with appropriate cards, through the card configuration
159 static const dev_info_t dev_info = "pcm-das08";
161 struct local_info_t {
162 struct pcmcia_device *link;
165 struct bus_operations *bus;
168 /*======================================================================
170 das08_pcmcia_attach() creates an "instance" of the driver, allocating
171 local data structures for one device. The device is registered
174 The dev_link structure is initialized, but we don't actually
175 configure the card at this point -- we wait until we receive a
176 card insertion event.
178 ======================================================================*/
180 static int das08_pcmcia_attach(struct pcmcia_device *link)
182 struct local_info_t *local;
184 DEBUG(0, "das08_pcmcia_attach()\n");
186 /* Allocate space for private device-specific data */
187 local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL);
193 /* Interrupt setup */
194 link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
195 link->irq.IRQInfo1 = IRQ_LEVEL_ID;
196 link->irq.Handler = NULL;
199 General socket configuration defaults can go here. In this
200 client, we assume very little, and rely on the CIS for almost
201 everything. In most clients, many details (i.e., number, sizes,
202 and attributes of IO windows) are fixed by the nature of the
203 device, and can be hard-wired here.
205 link->conf.Attributes = 0;
206 link->conf.IntType = INT_MEMORY_AND_IO;
210 das08_pcmcia_config(link);
213 } /* das08_pcmcia_attach */
215 /*======================================================================
217 This deletes a driver "instance". The device is de-registered
218 with Card Services. If it has been released, all local data
219 structures are freed. Otherwise, the structures will be freed
220 when the device is released.
222 ======================================================================*/
224 static void das08_pcmcia_detach(struct pcmcia_device *link)
227 DEBUG(0, "das08_pcmcia_detach(0x%p)\n", link);
229 if (link->dev_node) {
230 ((struct local_info_t *)link->priv)->stop = 1;
231 das08_pcmcia_release(link);
234 /* This points to the parent struct local_info_t struct */
238 } /* das08_pcmcia_detach */
240 /*======================================================================
242 das08_pcmcia_config() is scheduled to run after a CARD_INSERTION event
243 is received, to configure the PCMCIA socket, and to make the
244 device available to the system.
246 ======================================================================*/
248 static void das08_pcmcia_config(struct pcmcia_device *link)
250 struct local_info_t *dev = link->priv;
253 int last_fn, last_ret;
255 cistpl_cftable_entry_t dflt = { 0 };
257 DEBUG(0, "das08_pcmcia_config(0x%p)\n", link);
260 This reads the card's CONFIG tuple to find its configuration
263 tuple.DesiredTuple = CISTPL_CONFIG;
264 tuple.Attributes = 0;
265 tuple.TupleData = buf;
266 tuple.TupleDataMax = sizeof(buf);
267 tuple.TupleOffset = 0;
268 last_fn = GetFirstTuple;
270 last_ret = pcmcia_get_first_tuple(link, &tuple);
274 last_fn = GetTupleData;
276 last_ret = pcmcia_get_tuple_data(link, &tuple);
280 last_fn = ParseTuple;
282 last_ret = pcmcia_parse_tuple(&tuple, &parse);
286 link->conf.ConfigBase = parse.config.base;
287 link->conf.Present = parse.config.rmask[0];
290 In this loop, we scan the CIS for configuration table entries,
291 each of which describes a valid card configuration, including
292 voltage, IO window, memory window, and interrupt settings.
294 We make no assumptions about the card to be configured: we use
295 just the information available in the CIS. In an ideal world,
296 this would work for any PCMCIA card, but it requires a complete
297 and accurate CIS. In practice, a driver usually "knows" most of
298 these things without consulting the CIS, and most client drivers
299 will only use the CIS to fill in implementation-defined details.
301 tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
302 last_fn = GetFirstTuple;
304 last_ret = pcmcia_get_first_tuple(link, &tuple);
309 cistpl_cftable_entry_t *cfg = &(parse.cftable_entry);
311 last_ret = pcmcia_get_tuple_data(link, &tuple);
315 last_ret = pcmcia_parse_tuple(&tuple, &parse);
319 if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
323 link->conf.ConfigIndex = cfg->index;
325 /* Does this card need audio output? */
326 /* if (cfg->flags & CISTPL_CFTABLE_AUDIO) {
327 link->conf.Attributes |= CONF_ENABLE_SPKR;
328 link->conf.Status = CCSR_AUDIO_ENA;
331 /* Do we need to allocate an interrupt? */
332 if (cfg->irq.IRQInfo1 || dflt.irq.IRQInfo1)
333 link->conf.Attributes |= CONF_ENABLE_IRQ;
335 /* IO window settings */
336 link->io.NumPorts1 = link->io.NumPorts2 = 0;
337 if ((cfg->io.nwin > 0) || (dflt.io.nwin > 0)) {
338 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt.io;
339 link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
340 if (!(io->flags & CISTPL_IO_8BIT))
341 link->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
342 if (!(io->flags & CISTPL_IO_16BIT))
343 link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
344 link->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
345 link->io.BasePort1 = io->win[0].base;
346 link->io.NumPorts1 = io->win[0].len;
348 link->io.Attributes2 = link->io.Attributes1;
349 link->io.BasePort2 = io->win[1].base;
350 link->io.NumPorts2 = io->win[1].len;
352 /* This reserves IO space but doesn't actually enable it */
353 if (pcmcia_request_io(link, &link->io) != 0)
357 /* If we got this far, we're cool! */
361 last_fn = GetNextTuple;
363 last_ret = pcmcia_get_next_tuple(link, &tuple);
368 if (link->conf.Attributes & CONF_ENABLE_IRQ) {
369 last_fn = RequestIRQ;
370 last_ret = pcmcia_request_irq(link, &link->irq);
376 This actually configures the PCMCIA socket -- setting up
377 the I/O windows and the interrupt mapping, and putting the
378 card and host interface into "Memory and IO" mode.
380 last_fn = RequestConfiguration;
381 last_ret = pcmcia_request_configuration(link, &link->conf);
386 At this point, the dev_node_t structure(s) need to be
387 initialized and arranged in a linked list at link->dev.
389 sprintf(dev->node.dev_name, "pcm-das08");
390 dev->node.major = dev->node.minor = 0;
391 link->dev_node = &dev->node;
393 /* Finally, report what we've done */
394 printk(KERN_INFO "%s: index 0x%02x",
395 dev->node.dev_name, link->conf.ConfigIndex);
396 if (link->conf.Attributes & CONF_ENABLE_IRQ)
397 printk(", irq %u", link->irq.AssignedIRQ);
398 if (link->io.NumPorts1)
399 printk(", io 0x%04x-0x%04x", link->io.BasePort1,
400 link->io.BasePort1 + link->io.NumPorts1 - 1);
401 if (link->io.NumPorts2)
402 printk(" & 0x%04x-0x%04x", link->io.BasePort2,
403 link->io.BasePort2 + link->io.NumPorts2 - 1);
409 cs_error(link, last_fn, last_ret);
410 das08_pcmcia_release(link);
412 } /* das08_pcmcia_config */
414 /*======================================================================
416 After a card is removed, das08_pcmcia_release() will unregister the
417 device, and release the PCMCIA configuration. If the device is
418 still open, this will be postponed until it is closed.
420 ======================================================================*/
422 static void das08_pcmcia_release(struct pcmcia_device *link)
424 DEBUG(0, "das08_pcmcia_release(0x%p)\n", link);
425 pcmcia_disable_device(link);
426 } /* das08_pcmcia_release */
428 /*======================================================================
430 The card status event handler. Mostly, this schedules other
431 stuff to run after an event is received.
433 When a CARD_REMOVAL event is received, we immediately set a
434 private flag to block future accesses to this device. All the
435 functions that actually access the device should check this flag
436 to make sure the card is still present.
438 ======================================================================*/
440 static int das08_pcmcia_suspend(struct pcmcia_device *link)
442 struct local_info_t *local = link->priv;
443 /* Mark the device as stopped, to block IO until later */
447 } /* das08_pcmcia_suspend */
449 static int das08_pcmcia_resume(struct pcmcia_device *link)
451 struct local_info_t *local = link->priv;
455 } /* das08_pcmcia_resume */
457 /*====================================================================*/
459 static struct pcmcia_device_id das08_cs_id_table[] = {
460 PCMCIA_DEVICE_MANF_CARD(0x01c5, 0x4001),
464 MODULE_DEVICE_TABLE(pcmcia, das08_cs_id_table);
466 struct pcmcia_driver das08_cs_driver = {
467 .probe = das08_pcmcia_attach,
468 .remove = das08_pcmcia_detach,
469 .suspend = das08_pcmcia_suspend,
470 .resume = das08_pcmcia_resume,
471 .id_table = das08_cs_id_table,
472 .owner = THIS_MODULE,
478 static int __init init_das08_pcmcia_cs(void)
480 DEBUG(0, "%s\n", version);
481 pcmcia_register_driver(&das08_cs_driver);
485 static void __exit exit_das08_pcmcia_cs(void)
487 DEBUG(0, "das08_pcmcia_cs: unloading\n");
488 pcmcia_unregister_driver(&das08_cs_driver);
491 static int __init das08_cs_init_module(void)
495 ret = init_das08_pcmcia_cs();
499 return comedi_driver_register(&driver_das08_cs);
502 static void __exit das08_cs_exit_module(void)
504 exit_das08_pcmcia_cs();
505 comedi_driver_unregister(&driver_das08_cs);
508 MODULE_LICENSE("GPL");
509 module_init(das08_cs_init_module);
510 module_exit(das08_cs_exit_module);