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>
46 #include <linux/slab.h>
51 #include <pcmcia/cs.h>
52 #include <pcmcia/cistpl.h>
53 #include <pcmcia/ds.h>
55 static struct pcmcia_device *cur_dev;
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->resource[0]->start;
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 ======================================================================*/
113 static void das08_pcmcia_config(struct pcmcia_device *link);
114 static void das08_pcmcia_release(struct pcmcia_device *link);
115 static int das08_pcmcia_suspend(struct pcmcia_device *p_dev);
116 static int das08_pcmcia_resume(struct pcmcia_device *p_dev);
119 The attach() and detach() entry points are used to create and destroy
120 "instances" of the driver, where each instance represents everything
121 needed to manage one actual PCMCIA card.
124 static int das08_pcmcia_attach(struct pcmcia_device *);
125 static void das08_pcmcia_detach(struct pcmcia_device *);
128 You'll also need to prototype all the functions that will actually
129 be used to talk to your device. See 'memory_cs' for a good example
130 of a fully self-sufficient driver; the other drivers rely more or
131 less on other parts of the kernel.
135 The dev_info variable is the "key" that is used to match up this
136 device driver with appropriate cards, through the card configuration
140 static const dev_info_t dev_info = "pcm-das08";
142 struct local_info_t {
143 struct pcmcia_device *link;
145 struct bus_operations *bus;
148 /*======================================================================
150 das08_pcmcia_attach() creates an "instance" of the driver, allocating
151 local data structures for one device. The device is registered
154 The dev_link structure is initialized, but we don't actually
155 configure the card at this point -- we wait until we receive a
156 card insertion event.
158 ======================================================================*/
160 static int das08_pcmcia_attach(struct pcmcia_device *link)
162 struct local_info_t *local;
164 dev_dbg(&link->dev, "das08_pcmcia_attach()\n");
166 /* Allocate space for private device-specific data */
167 local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL);
174 General socket configuration defaults can go here. In this
175 client, we assume very little, and rely on the CIS for almost
176 everything. In most clients, many details (i.e., number, sizes,
177 and attributes of IO windows) are fixed by the nature of the
178 device, and can be hard-wired here.
180 link->conf.Attributes = 0;
181 link->conf.IntType = INT_MEMORY_AND_IO;
185 das08_pcmcia_config(link);
188 } /* das08_pcmcia_attach */
190 /*======================================================================
192 This deletes a driver "instance". The device is de-registered
193 with Card Services. If it has been released, all local data
194 structures are freed. Otherwise, the structures will be freed
195 when the device is released.
197 ======================================================================*/
199 static void das08_pcmcia_detach(struct pcmcia_device *link)
202 dev_dbg(&link->dev, "das08_pcmcia_detach\n");
204 ((struct local_info_t *)link->priv)->stop = 1;
205 das08_pcmcia_release(link);
207 /* This points to the parent struct local_info_t struct */
211 } /* das08_pcmcia_detach */
214 static int das08_pcmcia_config_loop(struct pcmcia_device *p_dev,
215 cistpl_cftable_entry_t *cfg,
216 cistpl_cftable_entry_t *dflt,
223 /* Do we need to allocate an interrupt? */
224 p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
226 /* IO window settings */
227 p_dev->io.NumPorts1 = p_dev->io.NumPorts2 = 0;
228 if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
229 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
230 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
231 if (!(io->flags & CISTPL_IO_8BIT))
232 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
233 if (!(io->flags & CISTPL_IO_16BIT))
234 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
235 p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
236 p_dev->io.BasePort1 = io->win[0].base;
237 p_dev->io.NumPorts1 = io->win[0].len;
239 p_dev->io.Attributes2 = p_dev->io.Attributes1;
240 p_dev->io.BasePort2 = io->win[1].base;
241 p_dev->io.NumPorts2 = io->win[1].len;
243 /* This reserves IO space but doesn't actually enable it */
244 return pcmcia_request_io(p_dev, &p_dev->io);
250 /*======================================================================
252 das08_pcmcia_config() is scheduled to run after a CARD_INSERTION event
253 is received, to configure the PCMCIA socket, and to make the
254 device available to the system.
256 ======================================================================*/
258 static void das08_pcmcia_config(struct pcmcia_device *link)
262 dev_dbg(&link->dev, "das08_pcmcia_config\n");
264 ret = pcmcia_loop_config(link, das08_pcmcia_config_loop, NULL);
266 dev_warn(&link->dev, "no configuration found\n");
274 This actually configures the PCMCIA socket -- setting up
275 the I/O windows and the interrupt mapping, and putting the
276 card and host interface into "Memory and IO" mode.
278 ret = pcmcia_request_configuration(link, &link->conf);
282 /* Finally, report what we've done */
283 dev_info(&link->dev, "index 0x%02x", link->conf.ConfigIndex);
284 if (link->conf.Attributes & CONF_ENABLE_IRQ)
285 printk(", irq %u", link->irq);
286 if (link->resource[0])
287 printk(", io %pR", link->resource[0]);
288 if (link->resource[1])
289 printk(" & %pR", link->resource[1]);
295 das08_pcmcia_release(link);
297 } /* das08_pcmcia_config */
299 /*======================================================================
301 After a card is removed, das08_pcmcia_release() will unregister the
302 device, and release the PCMCIA configuration. If the device is
303 still open, this will be postponed until it is closed.
305 ======================================================================*/
307 static void das08_pcmcia_release(struct pcmcia_device *link)
309 dev_dbg(&link->dev, "das08_pcmcia_release\n");
310 pcmcia_disable_device(link);
311 } /* das08_pcmcia_release */
313 /*======================================================================
315 The card status event handler. Mostly, this schedules other
316 stuff to run after an event is received.
318 When a CARD_REMOVAL event is received, we immediately set a
319 private flag to block future accesses to this device. All the
320 functions that actually access the device should check this flag
321 to make sure the card is still present.
323 ======================================================================*/
325 static int das08_pcmcia_suspend(struct pcmcia_device *link)
327 struct local_info_t *local = link->priv;
328 /* Mark the device as stopped, to block IO until later */
332 } /* das08_pcmcia_suspend */
334 static int das08_pcmcia_resume(struct pcmcia_device *link)
336 struct local_info_t *local = link->priv;
340 } /* das08_pcmcia_resume */
342 /*====================================================================*/
344 static struct pcmcia_device_id das08_cs_id_table[] = {
345 PCMCIA_DEVICE_MANF_CARD(0x01c5, 0x4001),
349 MODULE_DEVICE_TABLE(pcmcia, das08_cs_id_table);
350 MODULE_AUTHOR("David A. Schleef <ds@schleef.org>, "
351 "Frank Mori Hess <fmhess@users.sourceforge.net>");
352 MODULE_DESCRIPTION("Comedi driver for ComputerBoards DAS-08 PCMCIA boards");
353 MODULE_LICENSE("GPL");
355 struct pcmcia_driver das08_cs_driver = {
356 .probe = das08_pcmcia_attach,
357 .remove = das08_pcmcia_detach,
358 .suspend = das08_pcmcia_suspend,
359 .resume = das08_pcmcia_resume,
360 .id_table = das08_cs_id_table,
361 .owner = THIS_MODULE,
367 static int __init init_das08_pcmcia_cs(void)
369 pcmcia_register_driver(&das08_cs_driver);
373 static void __exit exit_das08_pcmcia_cs(void)
375 pr_debug("das08_pcmcia_cs: unloading\n");
376 pcmcia_unregister_driver(&das08_cs_driver);
379 static int __init das08_cs_init_module(void)
383 ret = init_das08_pcmcia_cs();
387 return comedi_driver_register(&driver_das08_cs);
390 static void __exit das08_cs_exit_module(void)
392 exit_das08_pcmcia_cs();
393 comedi_driver_unregister(&driver_das08_cs);
396 module_init(das08_cs_init_module);
397 module_exit(das08_cs_exit_module);