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.
134 struct local_info_t {
135 struct pcmcia_device *link;
137 struct bus_operations *bus;
140 /*======================================================================
142 das08_pcmcia_attach() creates an "instance" of the driver, allocating
143 local data structures for one device. The device is registered
146 The dev_link structure is initialized, but we don't actually
147 configure the card at this point -- we wait until we receive a
148 card insertion event.
150 ======================================================================*/
152 static int das08_pcmcia_attach(struct pcmcia_device *link)
154 struct local_info_t *local;
156 dev_dbg(&link->dev, "das08_pcmcia_attach()\n");
158 /* Allocate space for private device-specific data */
159 local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL);
166 General socket configuration defaults can go here. In this
167 client, we assume very little, and rely on the CIS for almost
168 everything. In most clients, many details (i.e., number, sizes,
169 and attributes of IO windows) are fixed by the nature of the
170 device, and can be hard-wired here.
172 link->conf.Attributes = 0;
173 link->conf.IntType = INT_MEMORY_AND_IO;
177 das08_pcmcia_config(link);
180 } /* das08_pcmcia_attach */
182 /*======================================================================
184 This deletes a driver "instance". The device is de-registered
185 with Card Services. If it has been released, all local data
186 structures are freed. Otherwise, the structures will be freed
187 when the device is released.
189 ======================================================================*/
191 static void das08_pcmcia_detach(struct pcmcia_device *link)
194 dev_dbg(&link->dev, "das08_pcmcia_detach\n");
196 ((struct local_info_t *)link->priv)->stop = 1;
197 das08_pcmcia_release(link);
199 /* This points to the parent struct local_info_t struct */
202 } /* das08_pcmcia_detach */
205 static int das08_pcmcia_config_loop(struct pcmcia_device *p_dev,
206 cistpl_cftable_entry_t *cfg,
207 cistpl_cftable_entry_t *dflt,
214 /* Do we need to allocate an interrupt? */
215 p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
217 /* IO window settings */
218 p_dev->resource[0]->end = p_dev->resource[1]->end = 0;
219 if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
220 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
221 p_dev->io_lines = io->flags & CISTPL_IO_LINES_MASK;
222 p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
223 p_dev->resource[0]->flags |=
224 pcmcia_io_cfg_data_width(io->flags);
225 p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
226 p_dev->resource[0]->start = io->win[0].base;
227 p_dev->resource[0]->end = io->win[0].len;
229 p_dev->resource[1]->flags = p_dev->resource[0]->flags;
230 p_dev->resource[1]->start = io->win[1].base;
231 p_dev->resource[1]->end = io->win[1].len;
233 /* This reserves IO space but doesn't actually enable it */
234 return pcmcia_request_io(p_dev);
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)
252 dev_dbg(&link->dev, "das08_pcmcia_config\n");
254 ret = pcmcia_loop_config(link, das08_pcmcia_config_loop, NULL);
256 dev_warn(&link->dev, "no configuration found\n");
264 This actually configures the PCMCIA socket -- setting up
265 the I/O windows and the interrupt mapping, and putting the
266 card and host interface into "Memory and IO" mode.
268 ret = pcmcia_request_configuration(link, &link->conf);
272 /* Finally, report what we've done */
273 dev_info(&link->dev, "index 0x%02x", link->conf.ConfigIndex);
274 if (link->conf.Attributes & CONF_ENABLE_IRQ)
275 printk(", irq %u", link->irq);
276 if (link->resource[0])
277 printk(", io %pR", link->resource[0]);
278 if (link->resource[1])
279 printk(" & %pR", link->resource[1]);
285 das08_pcmcia_release(link);
287 } /* das08_pcmcia_config */
289 /*======================================================================
291 After a card is removed, das08_pcmcia_release() will unregister the
292 device, and release the PCMCIA configuration. If the device is
293 still open, this will be postponed until it is closed.
295 ======================================================================*/
297 static void das08_pcmcia_release(struct pcmcia_device *link)
299 dev_dbg(&link->dev, "das08_pcmcia_release\n");
300 pcmcia_disable_device(link);
301 } /* das08_pcmcia_release */
303 /*======================================================================
305 The card status event handler. Mostly, this schedules other
306 stuff to run after an event is received.
308 When a CARD_REMOVAL event is received, we immediately set a
309 private flag to block future accesses to this device. All the
310 functions that actually access the device should check this flag
311 to make sure the card is still present.
313 ======================================================================*/
315 static int das08_pcmcia_suspend(struct pcmcia_device *link)
317 struct local_info_t *local = link->priv;
318 /* Mark the device as stopped, to block IO until later */
322 } /* das08_pcmcia_suspend */
324 static int das08_pcmcia_resume(struct pcmcia_device *link)
326 struct local_info_t *local = link->priv;
330 } /* das08_pcmcia_resume */
332 /*====================================================================*/
334 static struct pcmcia_device_id das08_cs_id_table[] = {
335 PCMCIA_DEVICE_MANF_CARD(0x01c5, 0x4001),
339 MODULE_DEVICE_TABLE(pcmcia, das08_cs_id_table);
340 MODULE_AUTHOR("David A. Schleef <ds@schleef.org>, "
341 "Frank Mori Hess <fmhess@users.sourceforge.net>");
342 MODULE_DESCRIPTION("Comedi driver for ComputerBoards DAS-08 PCMCIA boards");
343 MODULE_LICENSE("GPL");
345 struct pcmcia_driver das08_cs_driver = {
346 .probe = das08_pcmcia_attach,
347 .remove = das08_pcmcia_detach,
348 .suspend = das08_pcmcia_suspend,
349 .resume = das08_pcmcia_resume,
350 .id_table = das08_cs_id_table,
351 .owner = THIS_MODULE,
357 static int __init init_das08_pcmcia_cs(void)
359 pcmcia_register_driver(&das08_cs_driver);
363 static void __exit exit_das08_pcmcia_cs(void)
365 pr_debug("das08_pcmcia_cs: unloading\n");
366 pcmcia_unregister_driver(&das08_cs_driver);
369 static int __init das08_cs_init_module(void)
373 ret = init_das08_pcmcia_cs();
377 return comedi_driver_register(&driver_das08_cs);
380 static void __exit das08_cs_exit_module(void)
382 exit_das08_pcmcia_cs();
383 comedi_driver_unregister(&driver_das08_cs);
386 module_init(das08_cs_init_module);
387 module_exit(das08_cs_exit_module);