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,
197 if (p_dev->config_index == 0)
200 return pcmcia_request_io(p_dev);
204 /*======================================================================
206 das08_pcmcia_config() is scheduled to run after a CARD_INSERTION event
207 is received, to configure the PCMCIA socket, and to make the
208 device available to the system.
210 ======================================================================*/
212 static void das08_pcmcia_config(struct pcmcia_device *link)
216 dev_dbg(&link->dev, "das08_pcmcia_config\n");
218 link->config_flags |= CONF_ENABLE_IRQ | CONF_AUTO_SET_IO;
220 ret = pcmcia_loop_config(link, das08_pcmcia_config_loop, NULL);
222 dev_warn(&link->dev, "no configuration found\n");
230 This actually configures the PCMCIA socket -- setting up
231 the I/O windows and the interrupt mapping, and putting the
232 card and host interface into "Memory and IO" mode.
234 ret = pcmcia_enable_device(link);
241 das08_pcmcia_release(link);
243 } /* das08_pcmcia_config */
245 /*======================================================================
247 After a card is removed, das08_pcmcia_release() will unregister the
248 device, and release the PCMCIA configuration. If the device is
249 still open, this will be postponed until it is closed.
251 ======================================================================*/
253 static void das08_pcmcia_release(struct pcmcia_device *link)
255 dev_dbg(&link->dev, "das08_pcmcia_release\n");
256 pcmcia_disable_device(link);
257 } /* das08_pcmcia_release */
259 /*======================================================================
261 The card status event handler. Mostly, this schedules other
262 stuff to run after an event is received.
264 When a CARD_REMOVAL event is received, we immediately set a
265 private flag to block future accesses to this device. All the
266 functions that actually access the device should check this flag
267 to make sure the card is still present.
269 ======================================================================*/
271 static int das08_pcmcia_suspend(struct pcmcia_device *link)
273 struct local_info_t *local = link->priv;
274 /* Mark the device as stopped, to block IO until later */
278 } /* das08_pcmcia_suspend */
280 static int das08_pcmcia_resume(struct pcmcia_device *link)
282 struct local_info_t *local = link->priv;
286 } /* das08_pcmcia_resume */
288 /*====================================================================*/
290 static struct pcmcia_device_id das08_cs_id_table[] = {
291 PCMCIA_DEVICE_MANF_CARD(0x01c5, 0x4001),
295 MODULE_DEVICE_TABLE(pcmcia, das08_cs_id_table);
296 MODULE_AUTHOR("David A. Schleef <ds@schleef.org>, "
297 "Frank Mori Hess <fmhess@users.sourceforge.net>");
298 MODULE_DESCRIPTION("Comedi driver for ComputerBoards DAS-08 PCMCIA boards");
299 MODULE_LICENSE("GPL");
301 struct pcmcia_driver das08_cs_driver = {
302 .probe = das08_pcmcia_attach,
303 .remove = das08_pcmcia_detach,
304 .suspend = das08_pcmcia_suspend,
305 .resume = das08_pcmcia_resume,
306 .id_table = das08_cs_id_table,
307 .owner = THIS_MODULE,
313 static int __init init_das08_pcmcia_cs(void)
315 pcmcia_register_driver(&das08_cs_driver);
319 static void __exit exit_das08_pcmcia_cs(void)
321 pr_debug("das08_pcmcia_cs: unloading\n");
322 pcmcia_unregister_driver(&das08_cs_driver);
325 static int __init das08_cs_init_module(void)
329 ret = init_das08_pcmcia_cs();
333 return comedi_driver_register(&driver_das08_cs);
336 static void __exit das08_cs_exit_module(void)
338 exit_das08_pcmcia_cs();
339 comedi_driver_unregister(&driver_das08_cs);
342 module_init(das08_cs_init_module);
343 module_exit(das08_cs_exit_module);