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);
176 General socket configuration defaults can go here. In this
177 client, we assume very little, and rely on the CIS for almost
178 everything. In most clients, many details (i.e., number, sizes,
179 and attributes of IO windows) are fixed by the nature of the
180 device, and can be hard-wired here.
182 link->conf.Attributes = 0;
183 link->conf.IntType = INT_MEMORY_AND_IO;
187 das08_pcmcia_config(link);
190 } /* das08_pcmcia_attach */
192 /*======================================================================
194 This deletes a driver "instance". The device is de-registered
195 with Card Services. If it has been released, all local data
196 structures are freed. Otherwise, the structures will be freed
197 when the device is released.
199 ======================================================================*/
201 static void das08_pcmcia_detach(struct pcmcia_device *link)
204 dev_dbg(&link->dev, "das08_pcmcia_detach\n");
206 if (link->dev_node) {
207 ((struct local_info_t *)link->priv)->stop = 1;
208 das08_pcmcia_release(link);
211 /* This points to the parent struct local_info_t struct */
215 } /* das08_pcmcia_detach */
218 static int das08_pcmcia_config_loop(struct pcmcia_device *p_dev,
219 cistpl_cftable_entry_t *cfg,
220 cistpl_cftable_entry_t *dflt,
227 /* Do we need to allocate an interrupt? */
228 p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
230 /* IO window settings */
231 p_dev->io.NumPorts1 = p_dev->io.NumPorts2 = 0;
232 if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
233 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
234 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
235 if (!(io->flags & CISTPL_IO_8BIT))
236 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
237 if (!(io->flags & CISTPL_IO_16BIT))
238 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
239 p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
240 p_dev->io.BasePort1 = io->win[0].base;
241 p_dev->io.NumPorts1 = io->win[0].len;
243 p_dev->io.Attributes2 = p_dev->io.Attributes1;
244 p_dev->io.BasePort2 = io->win[1].base;
245 p_dev->io.NumPorts2 = io->win[1].len;
247 /* This reserves IO space but doesn't actually enable it */
248 return pcmcia_request_io(p_dev, &p_dev->io);
254 /*======================================================================
256 das08_pcmcia_config() is scheduled to run after a CARD_INSERTION event
257 is received, to configure the PCMCIA socket, and to make the
258 device available to the system.
260 ======================================================================*/
262 static void das08_pcmcia_config(struct pcmcia_device *link)
264 struct local_info_t *dev = link->priv;
267 dev_dbg(&link->dev, "das08_pcmcia_config\n");
269 ret = pcmcia_loop_config(link, das08_pcmcia_config_loop, NULL);
271 dev_warn(&link->dev, "no configuration found\n");
279 This actually configures the PCMCIA socket -- setting up
280 the I/O windows and the interrupt mapping, and putting the
281 card and host interface into "Memory and IO" mode.
283 ret = pcmcia_request_configuration(link, &link->conf);
288 At this point, the dev_node_t structure(s) need to be
289 initialized and arranged in a linked list at link->dev.
291 sprintf(dev->node.dev_name, "pcm-das08");
292 dev->node.major = dev->node.minor = 0;
293 link->dev_node = &dev->node;
295 /* Finally, report what we've done */
296 printk(KERN_INFO "%s: index 0x%02x",
297 dev->node.dev_name, link->conf.ConfigIndex);
298 if (link->conf.Attributes & CONF_ENABLE_IRQ)
299 printk(", irq %u", link->irq);
300 if (link->io.NumPorts1)
301 printk(", io 0x%04x-0x%04x", link->io.BasePort1,
302 link->io.BasePort1 + link->io.NumPorts1 - 1);
303 if (link->io.NumPorts2)
304 printk(" & 0x%04x-0x%04x", link->io.BasePort2,
305 link->io.BasePort2 + link->io.NumPorts2 - 1);
311 das08_pcmcia_release(link);
313 } /* das08_pcmcia_config */
315 /*======================================================================
317 After a card is removed, das08_pcmcia_release() will unregister the
318 device, and release the PCMCIA configuration. If the device is
319 still open, this will be postponed until it is closed.
321 ======================================================================*/
323 static void das08_pcmcia_release(struct pcmcia_device *link)
325 dev_dbg(&link->dev, "das08_pcmcia_release\n");
326 pcmcia_disable_device(link);
327 } /* das08_pcmcia_release */
329 /*======================================================================
331 The card status event handler. Mostly, this schedules other
332 stuff to run after an event is received.
334 When a CARD_REMOVAL event is received, we immediately set a
335 private flag to block future accesses to this device. All the
336 functions that actually access the device should check this flag
337 to make sure the card is still present.
339 ======================================================================*/
341 static int das08_pcmcia_suspend(struct pcmcia_device *link)
343 struct local_info_t *local = link->priv;
344 /* Mark the device as stopped, to block IO until later */
348 } /* das08_pcmcia_suspend */
350 static int das08_pcmcia_resume(struct pcmcia_device *link)
352 struct local_info_t *local = link->priv;
356 } /* das08_pcmcia_resume */
358 /*====================================================================*/
360 static struct pcmcia_device_id das08_cs_id_table[] = {
361 PCMCIA_DEVICE_MANF_CARD(0x01c5, 0x4001),
365 MODULE_DEVICE_TABLE(pcmcia, das08_cs_id_table);
367 struct pcmcia_driver das08_cs_driver = {
368 .probe = das08_pcmcia_attach,
369 .remove = das08_pcmcia_detach,
370 .suspend = das08_pcmcia_suspend,
371 .resume = das08_pcmcia_resume,
372 .id_table = das08_cs_id_table,
373 .owner = THIS_MODULE,
379 static int __init init_das08_pcmcia_cs(void)
381 pcmcia_register_driver(&das08_cs_driver);
385 static void __exit exit_das08_pcmcia_cs(void)
387 pr_debug("das08_pcmcia_cs: unloading\n");
388 pcmcia_unregister_driver(&das08_cs_driver);
391 static int __init das08_cs_init_module(void)
395 ret = init_das08_pcmcia_cs();
399 return comedi_driver_register(&driver_das08_cs);
402 static void __exit das08_cs_exit_module(void)
404 exit_das08_pcmcia_cs();
405 comedi_driver_unregister(&driver_das08_cs);
408 MODULE_LICENSE("GPL");
409 module_init(das08_cs_init_module);
410 module_exit(das08_cs_exit_module);