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;
147 struct bus_operations *bus;
150 /*======================================================================
152 das08_pcmcia_attach() creates an "instance" of the driver, allocating
153 local data structures for one device. The device is registered
156 The dev_link structure is initialized, but we don't actually
157 configure the card at this point -- we wait until we receive a
158 card insertion event.
160 ======================================================================*/
162 static int das08_pcmcia_attach(struct pcmcia_device *link)
164 struct local_info_t *local;
166 dev_dbg(&link->dev, "das08_pcmcia_attach()\n");
168 /* Allocate space for private device-specific data */
169 local = kzalloc(sizeof(struct local_info_t), GFP_KERNEL);
175 /* Interrupt setup */
176 link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
177 link->irq.Handler = NULL;
180 General socket configuration defaults can go here. In this
181 client, we assume very little, and rely on the CIS for almost
182 everything. In most clients, many details (i.e., number, sizes,
183 and attributes of IO windows) are fixed by the nature of the
184 device, and can be hard-wired here.
186 link->conf.Attributes = 0;
187 link->conf.IntType = INT_MEMORY_AND_IO;
191 das08_pcmcia_config(link);
194 } /* das08_pcmcia_attach */
196 /*======================================================================
198 This deletes a driver "instance". The device is de-registered
199 with Card Services. If it has been released, all local data
200 structures are freed. Otherwise, the structures will be freed
201 when the device is released.
203 ======================================================================*/
205 static void das08_pcmcia_detach(struct pcmcia_device *link)
208 dev_dbg(&link->dev, "das08_pcmcia_detach\n");
210 if (link->dev_node) {
211 ((struct local_info_t *)link->priv)->stop = 1;
212 das08_pcmcia_release(link);
215 /* This points to the parent struct local_info_t struct */
219 } /* das08_pcmcia_detach */
222 static int das08_pcmcia_config_loop(struct pcmcia_device *p_dev,
223 cistpl_cftable_entry_t *cfg,
224 cistpl_cftable_entry_t *dflt,
231 /* Do we need to allocate an interrupt? */
232 if (cfg->irq.IRQInfo1 || dflt->irq.IRQInfo1)
233 p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
235 /* IO window settings */
236 p_dev->io.NumPorts1 = p_dev->io.NumPorts2 = 0;
237 if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
238 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
239 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
240 if (!(io->flags & CISTPL_IO_8BIT))
241 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
242 if (!(io->flags & CISTPL_IO_16BIT))
243 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
244 p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
245 p_dev->io.BasePort1 = io->win[0].base;
246 p_dev->io.NumPorts1 = io->win[0].len;
248 p_dev->io.Attributes2 = p_dev->io.Attributes1;
249 p_dev->io.BasePort2 = io->win[1].base;
250 p_dev->io.NumPorts2 = io->win[1].len;
252 /* This reserves IO space but doesn't actually enable it */
253 return pcmcia_request_io(p_dev, &p_dev->io);
259 /*======================================================================
261 das08_pcmcia_config() is scheduled to run after a CARD_INSERTION event
262 is received, to configure the PCMCIA socket, and to make the
263 device available to the system.
265 ======================================================================*/
267 static void das08_pcmcia_config(struct pcmcia_device *link)
269 struct local_info_t *dev = link->priv;
272 dev_dbg(&link->dev, "das08_pcmcia_config\n");
274 ret = pcmcia_loop_config(link, das08_pcmcia_config_loop, NULL);
276 dev_warn(&link->dev, "no configuration found\n");
280 if (link->conf.Attributes & CONF_ENABLE_IRQ) {
281 ret = pcmcia_request_irq(link, &link->irq);
287 This actually configures the PCMCIA socket -- setting up
288 the I/O windows and the interrupt mapping, and putting the
289 card and host interface into "Memory and IO" mode.
291 ret = pcmcia_request_configuration(link, &link->conf);
296 At this point, the dev_node_t structure(s) need to be
297 initialized and arranged in a linked list at link->dev.
299 sprintf(dev->node.dev_name, "pcm-das08");
300 dev->node.major = dev->node.minor = 0;
301 link->dev_node = &dev->node;
303 /* Finally, report what we've done */
304 printk(KERN_INFO "%s: index 0x%02x",
305 dev->node.dev_name, link->conf.ConfigIndex);
306 if (link->conf.Attributes & CONF_ENABLE_IRQ)
307 printk(", irq %u", link->irq.AssignedIRQ);
308 if (link->io.NumPorts1)
309 printk(", io 0x%04x-0x%04x", link->io.BasePort1,
310 link->io.BasePort1 + link->io.NumPorts1 - 1);
311 if (link->io.NumPorts2)
312 printk(" & 0x%04x-0x%04x", link->io.BasePort2,
313 link->io.BasePort2 + link->io.NumPorts2 - 1);
319 das08_pcmcia_release(link);
321 } /* das08_pcmcia_config */
323 /*======================================================================
325 After a card is removed, das08_pcmcia_release() will unregister the
326 device, and release the PCMCIA configuration. If the device is
327 still open, this will be postponed until it is closed.
329 ======================================================================*/
331 static void das08_pcmcia_release(struct pcmcia_device *link)
333 dev_dbg(&link->dev, "das08_pcmcia_release\n");
334 pcmcia_disable_device(link);
335 } /* das08_pcmcia_release */
337 /*======================================================================
339 The card status event handler. Mostly, this schedules other
340 stuff to run after an event is received.
342 When a CARD_REMOVAL event is received, we immediately set a
343 private flag to block future accesses to this device. All the
344 functions that actually access the device should check this flag
345 to make sure the card is still present.
347 ======================================================================*/
349 static int das08_pcmcia_suspend(struct pcmcia_device *link)
351 struct local_info_t *local = link->priv;
352 /* Mark the device as stopped, to block IO until later */
356 } /* das08_pcmcia_suspend */
358 static int das08_pcmcia_resume(struct pcmcia_device *link)
360 struct local_info_t *local = link->priv;
364 } /* das08_pcmcia_resume */
366 /*====================================================================*/
368 static struct pcmcia_device_id das08_cs_id_table[] = {
369 PCMCIA_DEVICE_MANF_CARD(0x01c5, 0x4001),
373 MODULE_DEVICE_TABLE(pcmcia, das08_cs_id_table);
375 struct pcmcia_driver das08_cs_driver = {
376 .probe = das08_pcmcia_attach,
377 .remove = das08_pcmcia_detach,
378 .suspend = das08_pcmcia_suspend,
379 .resume = das08_pcmcia_resume,
380 .id_table = das08_cs_id_table,
381 .owner = THIS_MODULE,
387 static int __init init_das08_pcmcia_cs(void)
389 pcmcia_register_driver(&das08_cs_driver);
393 static void __exit exit_das08_pcmcia_cs(void)
395 pr_debug("das08_pcmcia_cs: unloading\n");
396 pcmcia_unregister_driver(&das08_cs_driver);
399 static int __init das08_cs_init_module(void)
403 ret = init_das08_pcmcia_cs();
407 return comedi_driver_register(&driver_das08_cs);
410 static void __exit das08_cs_exit_module(void)
412 exit_das08_pcmcia_cs();
413 comedi_driver_unregister(&driver_das08_cs);
416 MODULE_LICENSE("GPL");
417 module_init(das08_cs_init_module);
418 module_exit(das08_cs_exit_module);