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/cistpl.h>
52 #include <pcmcia/ds.h>
54 static struct pcmcia_device *cur_dev;
56 #define thisboard ((const struct das08_board_struct *)dev->board_ptr)
58 static int das08_cs_attach(struct comedi_device *dev,
59 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 = ARRAY_SIZE(das08_cs_boards),
68 .offset = sizeof(struct das08_board_struct),
71 static int das08_cs_attach(struct comedi_device *dev,
72 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->resource[0]->start;
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 ======================================================================*/
112 static void das08_pcmcia_config(struct pcmcia_device *link);
113 static void das08_pcmcia_release(struct pcmcia_device *link);
114 static int das08_pcmcia_suspend(struct pcmcia_device *p_dev);
115 static int das08_pcmcia_resume(struct pcmcia_device *p_dev);
118 The attach() and detach() entry points are used to create and destroy
119 "instances" of the driver, where each instance represents everything
120 needed to manage one actual PCMCIA card.
123 static int das08_pcmcia_attach(struct pcmcia_device *);
124 static void das08_pcmcia_detach(struct pcmcia_device *);
127 You'll also need to prototype all the functions that will actually
128 be used to talk to your device. See 'memory_cs' for a good example
129 of a fully self-sufficient driver; the other drivers rely more or
130 less on other parts of the kernel.
133 struct local_info_t {
134 struct pcmcia_device *link;
136 struct bus_operations *bus;
139 /*======================================================================
141 das08_pcmcia_attach() creates an "instance" of the driver, allocating
142 local data structures for one device. The device is registered
145 The dev_link structure is initialized, but we don't actually
146 configure the card at this point -- we wait until we receive a
147 card insertion event.
149 ======================================================================*/
151 static int das08_pcmcia_attach(struct pcmcia_device *link)
153 struct local_info_t *local;
155 dev_dbg(&link->dev, "das08_pcmcia_attach()\n");
157 /* Allocate space for private device-specific data */
158 local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL);
166 das08_pcmcia_config(link);
169 } /* das08_pcmcia_attach */
171 /*======================================================================
173 This deletes a driver "instance". The device is de-registered
174 with Card Services. If it has been released, all local data
175 structures are freed. Otherwise, the structures will be freed
176 when the device is released.
178 ======================================================================*/
180 static void das08_pcmcia_detach(struct pcmcia_device *link)
183 dev_dbg(&link->dev, "das08_pcmcia_detach\n");
185 ((struct local_info_t *)link->priv)->stop = 1;
186 das08_pcmcia_release(link);
188 /* This points to the parent struct local_info_t struct */
191 } /* das08_pcmcia_detach */
194 static int das08_pcmcia_config_loop(struct pcmcia_device *p_dev,
195 cistpl_cftable_entry_t *cfg,
196 cistpl_cftable_entry_t *dflt,
203 /* Do we need to allocate an interrupt? */
204 p_dev->config_flags |= CONF_ENABLE_IRQ;
206 /* IO window settings */
207 p_dev->resource[0]->end = p_dev->resource[1]->end = 0;
208 if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
209 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
210 p_dev->io_lines = io->flags & CISTPL_IO_LINES_MASK;
211 p_dev->resource[0]->flags &= ~IO_DATA_PATH_WIDTH;
212 p_dev->resource[0]->flags |=
213 pcmcia_io_cfg_data_width(io->flags);
214 p_dev->resource[0]->start = io->win[0].base;
215 p_dev->resource[0]->end = io->win[0].len;
217 p_dev->resource[1]->flags = p_dev->resource[0]->flags;
218 p_dev->resource[1]->start = io->win[1].base;
219 p_dev->resource[1]->end = io->win[1].len;
221 /* This reserves IO space but doesn't actually enable it */
222 return pcmcia_request_io(p_dev);
228 /*======================================================================
230 das08_pcmcia_config() is scheduled to run after a CARD_INSERTION event
231 is received, to configure the PCMCIA socket, and to make the
232 device available to the system.
234 ======================================================================*/
236 static void das08_pcmcia_config(struct pcmcia_device *link)
240 dev_dbg(&link->dev, "das08_pcmcia_config\n");
242 ret = pcmcia_loop_config(link, das08_pcmcia_config_loop, NULL);
244 dev_warn(&link->dev, "no configuration found\n");
252 This actually configures the PCMCIA socket -- setting up
253 the I/O windows and the interrupt mapping, and putting the
254 card and host interface into "Memory and IO" mode.
256 ret = pcmcia_enable_device(link);
260 /* Finally, report what we've done */
261 dev_info(&link->dev, "index 0x%02x", link->config_index);
262 printk(", irq %u", link->irq);
263 if (link->resource[0])
264 printk(", io %pR", link->resource[0]);
265 if (link->resource[1])
266 printk(" & %pR", link->resource[1]);
272 das08_pcmcia_release(link);
274 } /* das08_pcmcia_config */
276 /*======================================================================
278 After a card is removed, das08_pcmcia_release() will unregister the
279 device, and release the PCMCIA configuration. If the device is
280 still open, this will be postponed until it is closed.
282 ======================================================================*/
284 static void das08_pcmcia_release(struct pcmcia_device *link)
286 dev_dbg(&link->dev, "das08_pcmcia_release\n");
287 pcmcia_disable_device(link);
288 } /* das08_pcmcia_release */
290 /*======================================================================
292 The card status event handler. Mostly, this schedules other
293 stuff to run after an event is received.
295 When a CARD_REMOVAL event is received, we immediately set a
296 private flag to block future accesses to this device. All the
297 functions that actually access the device should check this flag
298 to make sure the card is still present.
300 ======================================================================*/
302 static int das08_pcmcia_suspend(struct pcmcia_device *link)
304 struct local_info_t *local = link->priv;
305 /* Mark the device as stopped, to block IO until later */
309 } /* das08_pcmcia_suspend */
311 static int das08_pcmcia_resume(struct pcmcia_device *link)
313 struct local_info_t *local = link->priv;
317 } /* das08_pcmcia_resume */
319 /*====================================================================*/
321 static struct pcmcia_device_id das08_cs_id_table[] = {
322 PCMCIA_DEVICE_MANF_CARD(0x01c5, 0x4001),
326 MODULE_DEVICE_TABLE(pcmcia, das08_cs_id_table);
327 MODULE_AUTHOR("David A. Schleef <ds@schleef.org>, "
328 "Frank Mori Hess <fmhess@users.sourceforge.net>");
329 MODULE_DESCRIPTION("Comedi driver for ComputerBoards DAS-08 PCMCIA boards");
330 MODULE_LICENSE("GPL");
332 struct pcmcia_driver das08_cs_driver = {
333 .probe = das08_pcmcia_attach,
334 .remove = das08_pcmcia_detach,
335 .suspend = das08_pcmcia_suspend,
336 .resume = das08_pcmcia_resume,
337 .id_table = das08_cs_id_table,
338 .owner = THIS_MODULE,
344 static int __init init_das08_pcmcia_cs(void)
346 pcmcia_register_driver(&das08_cs_driver);
350 static void __exit exit_das08_pcmcia_cs(void)
352 pr_debug("das08_pcmcia_cs: unloading\n");
353 pcmcia_unregister_driver(&das08_cs_driver);
356 static int __init das08_cs_init_module(void)
360 ret = init_das08_pcmcia_cs();
364 return comedi_driver_register(&driver_das08_cs);
367 static void __exit das08_cs_exit_module(void)
369 exit_das08_pcmcia_cs();
370 comedi_driver_unregister(&driver_das08_cs);
373 module_init(das08_cs_init_module);
374 module_exit(das08_cs_exit_module);