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_types.h>
52 #include <pcmcia/cs.h>
53 #include <pcmcia/cistpl.h>
54 #include <pcmcia/ds.h>
56 static struct pcmcia_device *cur_dev;
58 #define thisboard ((const struct das08_board_struct *)dev->board_ptr)
60 static int das08_cs_attach(struct comedi_device *dev,
61 struct comedi_devconfig *it);
63 static struct comedi_driver driver_das08_cs = {
64 .driver_name = "das08_cs",
65 .module = THIS_MODULE,
66 .attach = das08_cs_attach,
67 .detach = das08_common_detach,
68 .board_name = &das08_cs_boards[0].name,
69 .num_names = ARRAY_SIZE(das08_cs_boards),
70 .offset = sizeof(struct das08_board_struct),
73 static int das08_cs_attach(struct comedi_device *dev,
74 struct comedi_devconfig *it)
78 struct pcmcia_device *link = cur_dev; /* XXX hack */
80 ret = alloc_private(dev, sizeof(struct das08_private_struct));
84 printk("comedi%d: das08_cs: ", dev->minor);
85 /* deal with a pci board */
87 if (thisboard->bustype == pcmcia) {
89 printk(" no pcmcia cards found\n");
92 iobase = link->io.BasePort1;
94 printk(" bug! board does not have PCMCIA bustype\n");
100 return das08_common_attach(dev, iobase);
103 /*======================================================================
105 The following pcmcia code for the pcm-das08 is adapted from the
106 dummy_cs.c driver of the Linux PCMCIA Card Services package.
108 The initial developer of the original code is David A. Hinds
109 <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
110 are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
112 ======================================================================*/
114 static void das08_pcmcia_config(struct pcmcia_device *link);
115 static void das08_pcmcia_release(struct pcmcia_device *link);
116 static int das08_pcmcia_suspend(struct pcmcia_device *p_dev);
117 static int das08_pcmcia_resume(struct pcmcia_device *p_dev);
120 The attach() and detach() entry points are used to create and destroy
121 "instances" of the driver, where each instance represents everything
122 needed to manage one actual PCMCIA card.
125 static int das08_pcmcia_attach(struct pcmcia_device *);
126 static void das08_pcmcia_detach(struct pcmcia_device *);
129 You'll also need to prototype all the functions that will actually
130 be used to talk to your device. See 'memory_cs' for a good example
131 of a fully self-sufficient driver; the other drivers rely more or
132 less on other parts of the kernel.
136 The dev_info variable is the "key" that is used to match up this
137 device driver with appropriate cards, through the card configuration
141 static const dev_info_t dev_info = "pcm-das08";
143 struct local_info_t {
144 struct pcmcia_device *link;
146 struct bus_operations *bus;
149 /*======================================================================
151 das08_pcmcia_attach() creates an "instance" of the driver, allocating
152 local data structures for one device. The device is registered
155 The dev_link structure is initialized, but we don't actually
156 configure the card at this point -- we wait until we receive a
157 card insertion event.
159 ======================================================================*/
161 static int das08_pcmcia_attach(struct pcmcia_device *link)
163 struct local_info_t *local;
165 dev_dbg(&link->dev, "das08_pcmcia_attach()\n");
167 /* Allocate space for private device-specific data */
168 local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL);
175 General socket configuration defaults can go here. In this
176 client, we assume very little, and rely on the CIS for almost
177 everything. In most clients, many details (i.e., number, sizes,
178 and attributes of IO windows) are fixed by the nature of the
179 device, and can be hard-wired here.
181 link->conf.Attributes = 0;
182 link->conf.IntType = INT_MEMORY_AND_IO;
186 das08_pcmcia_config(link);
189 } /* das08_pcmcia_attach */
191 /*======================================================================
193 This deletes a driver "instance". The device is de-registered
194 with Card Services. If it has been released, all local data
195 structures are freed. Otherwise, the structures will be freed
196 when the device is released.
198 ======================================================================*/
200 static void das08_pcmcia_detach(struct pcmcia_device *link)
203 dev_dbg(&link->dev, "das08_pcmcia_detach\n");
205 ((struct local_info_t *)link->priv)->stop = 1;
206 das08_pcmcia_release(link);
208 /* This points to the parent struct local_info_t struct */
212 } /* das08_pcmcia_detach */
215 static int das08_pcmcia_config_loop(struct pcmcia_device *p_dev,
216 cistpl_cftable_entry_t *cfg,
217 cistpl_cftable_entry_t *dflt,
224 /* Do we need to allocate an interrupt? */
225 p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
227 /* IO window settings */
228 p_dev->io.NumPorts1 = p_dev->io.NumPorts2 = 0;
229 if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
230 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
231 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
232 if (!(io->flags & CISTPL_IO_8BIT))
233 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
234 if (!(io->flags & CISTPL_IO_16BIT))
235 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
236 p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
237 p_dev->io.BasePort1 = io->win[0].base;
238 p_dev->io.NumPorts1 = io->win[0].len;
240 p_dev->io.Attributes2 = p_dev->io.Attributes1;
241 p_dev->io.BasePort2 = io->win[1].base;
242 p_dev->io.NumPorts2 = io->win[1].len;
244 /* This reserves IO space but doesn't actually enable it */
245 return pcmcia_request_io(p_dev, &p_dev->io);
251 /*======================================================================
253 das08_pcmcia_config() is scheduled to run after a CARD_INSERTION event
254 is received, to configure the PCMCIA socket, and to make the
255 device available to the system.
257 ======================================================================*/
259 static void das08_pcmcia_config(struct pcmcia_device *link)
263 dev_dbg(&link->dev, "das08_pcmcia_config\n");
265 ret = pcmcia_loop_config(link, das08_pcmcia_config_loop, NULL);
267 dev_warn(&link->dev, "no configuration found\n");
275 This actually configures the PCMCIA socket -- setting up
276 the I/O windows and the interrupt mapping, and putting the
277 card and host interface into "Memory and IO" mode.
279 ret = pcmcia_request_configuration(link, &link->conf);
283 /* Finally, report what we've done */
284 dev_info(&link->dev, "index 0x%02x", link->conf.ConfigIndex);
285 if (link->conf.Attributes & CONF_ENABLE_IRQ)
286 printk(", irq %u", link->irq);
287 if (link->io.NumPorts1)
288 printk(", io 0x%04x-0x%04x", link->io.BasePort1,
289 link->io.BasePort1 + link->io.NumPorts1 - 1);
290 if (link->io.NumPorts2)
291 printk(" & 0x%04x-0x%04x", link->io.BasePort2,
292 link->io.BasePort2 + link->io.NumPorts2 - 1);
298 das08_pcmcia_release(link);
300 } /* das08_pcmcia_config */
302 /*======================================================================
304 After a card is removed, das08_pcmcia_release() will unregister the
305 device, and release the PCMCIA configuration. If the device is
306 still open, this will be postponed until it is closed.
308 ======================================================================*/
310 static void das08_pcmcia_release(struct pcmcia_device *link)
312 dev_dbg(&link->dev, "das08_pcmcia_release\n");
313 pcmcia_disable_device(link);
314 } /* das08_pcmcia_release */
316 /*======================================================================
318 The card status event handler. Mostly, this schedules other
319 stuff to run after an event is received.
321 When a CARD_REMOVAL event is received, we immediately set a
322 private flag to block future accesses to this device. All the
323 functions that actually access the device should check this flag
324 to make sure the card is still present.
326 ======================================================================*/
328 static int das08_pcmcia_suspend(struct pcmcia_device *link)
330 struct local_info_t *local = link->priv;
331 /* Mark the device as stopped, to block IO until later */
335 } /* das08_pcmcia_suspend */
337 static int das08_pcmcia_resume(struct pcmcia_device *link)
339 struct local_info_t *local = link->priv;
343 } /* das08_pcmcia_resume */
345 /*====================================================================*/
347 static struct pcmcia_device_id das08_cs_id_table[] = {
348 PCMCIA_DEVICE_MANF_CARD(0x01c5, 0x4001),
352 MODULE_DEVICE_TABLE(pcmcia, das08_cs_id_table);
353 MODULE_AUTHOR("David A. Schleef <ds@schleef.org>, "
354 "Frank Mori Hess <fmhess@users.sourceforge.net>");
355 MODULE_DESCRIPTION("Comedi driver for ComputerBoards DAS-08 PCMCIA boards");
356 MODULE_LICENSE("GPL");
358 struct pcmcia_driver das08_cs_driver = {
359 .probe = das08_pcmcia_attach,
360 .remove = das08_pcmcia_detach,
361 .suspend = das08_pcmcia_suspend,
362 .resume = das08_pcmcia_resume,
363 .id_table = das08_cs_id_table,
364 .owner = THIS_MODULE,
370 static int __init init_das08_pcmcia_cs(void)
372 pcmcia_register_driver(&das08_cs_driver);
376 static void __exit exit_das08_pcmcia_cs(void)
378 pr_debug("das08_pcmcia_cs: unloading\n");
379 pcmcia_unregister_driver(&das08_cs_driver);
382 static int __init das08_cs_init_module(void)
386 ret = init_das08_pcmcia_cs();
390 return comedi_driver_register(&driver_das08_cs);
393 static void __exit das08_cs_exit_module(void)
395 exit_das08_pcmcia_cs();
396 comedi_driver_unregister(&driver_das08_cs);
399 module_init(das08_cs_init_module);
400 module_exit(das08_cs_exit_module);