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>
50 #include <pcmcia/cs_types.h>
51 #include <pcmcia/cs.h>
52 #include <pcmcia/cistpl.h>
53 #include <pcmcia/ds.h>
55 static struct pcmcia_device *cur_dev;
57 #define thisboard ((const struct das08_board_struct *)dev->board_ptr)
59 static int das08_cs_attach(struct comedi_device *dev,
60 struct comedi_devconfig *it);
62 static struct comedi_driver driver_das08_cs = {
63 .driver_name = "das08_cs",
64 .module = THIS_MODULE,
65 .attach = das08_cs_attach,
66 .detach = das08_common_detach,
67 .board_name = &das08_cs_boards[0].name,
68 .num_names = ARRAY_SIZE(das08_cs_boards),
69 .offset = sizeof(struct das08_board_struct),
72 static int das08_cs_attach(struct comedi_device *dev,
73 struct comedi_devconfig *it)
77 struct pcmcia_device *link = cur_dev; /* XXX hack */
79 ret = alloc_private(dev, sizeof(struct das08_private_struct));
83 printk("comedi%d: das08_cs: ", dev->minor);
84 /* deal with a pci board */
86 if (thisboard->bustype == pcmcia) {
88 printk(" no pcmcia cards found\n");
91 iobase = link->io.BasePort1;
93 printk(" bug! board does not have PCMCIA bustype\n");
99 return das08_common_attach(dev, iobase);
102 /*======================================================================
104 The following pcmcia code for the pcm-das08 is adapted from the
105 dummy_cs.c driver of the Linux PCMCIA Card Services package.
107 The initial developer of the original code is David A. Hinds
108 <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
109 are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
111 ======================================================================*/
113 static void das08_pcmcia_config(struct pcmcia_device *link);
114 static void das08_pcmcia_release(struct pcmcia_device *link);
115 static int das08_pcmcia_suspend(struct pcmcia_device *p_dev);
116 static int das08_pcmcia_resume(struct pcmcia_device *p_dev);
119 The attach() and detach() entry points are used to create and destroy
120 "instances" of the driver, where each instance represents everything
121 needed to manage one actual PCMCIA card.
124 static int das08_pcmcia_attach(struct pcmcia_device *);
125 static void das08_pcmcia_detach(struct pcmcia_device *);
128 You'll also need to prototype all the functions that will actually
129 be used to talk to your device. See 'memory_cs' for a good example
130 of a fully self-sufficient driver; the other drivers rely more or
131 less on other parts of the kernel.
135 The dev_info variable is the "key" that is used to match up this
136 device driver with appropriate cards, through the card configuration
140 static const dev_info_t dev_info = "pcm-das08";
142 struct local_info_t {
143 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);
174 /* Interrupt setup */
175 link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
176 link->irq.Handler = NULL;
179 General socket configuration defaults can go here. In this
180 client, we assume very little, and rely on the CIS for almost
181 everything. In most clients, many details (i.e., number, sizes,
182 and attributes of IO windows) are fixed by the nature of the
183 device, and can be hard-wired here.
185 link->conf.Attributes = 0;
186 link->conf.IntType = INT_MEMORY_AND_IO;
190 das08_pcmcia_config(link);
193 } /* das08_pcmcia_attach */
195 /*======================================================================
197 This deletes a driver "instance". The device is de-registered
198 with Card Services. If it has been released, all local data
199 structures are freed. Otherwise, the structures will be freed
200 when the device is released.
202 ======================================================================*/
204 static void das08_pcmcia_detach(struct pcmcia_device *link)
207 dev_dbg(&link->dev, "das08_pcmcia_detach\n");
209 if (link->dev_node) {
210 ((struct local_info_t *)link->priv)->stop = 1;
211 das08_pcmcia_release(link);
214 /* This points to the parent struct local_info_t struct */
218 } /* das08_pcmcia_detach */
221 static int das08_pcmcia_config_loop(struct pcmcia_device *p_dev,
222 cistpl_cftable_entry_t *cfg,
223 cistpl_cftable_entry_t *dflt,
230 /* Do we need to allocate an interrupt? */
231 if (cfg->irq.IRQInfo1 || dflt->irq.IRQInfo1)
232 p_dev->conf.Attributes |= CONF_ENABLE_IRQ;
234 /* IO window settings */
235 p_dev->io.NumPorts1 = p_dev->io.NumPorts2 = 0;
236 if ((cfg->io.nwin > 0) || (dflt->io.nwin > 0)) {
237 cistpl_io_t *io = (cfg->io.nwin) ? &cfg->io : &dflt->io;
238 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
239 if (!(io->flags & CISTPL_IO_8BIT))
240 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_16;
241 if (!(io->flags & CISTPL_IO_16BIT))
242 p_dev->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
243 p_dev->io.IOAddrLines = io->flags & CISTPL_IO_LINES_MASK;
244 p_dev->io.BasePort1 = io->win[0].base;
245 p_dev->io.NumPorts1 = io->win[0].len;
247 p_dev->io.Attributes2 = p_dev->io.Attributes1;
248 p_dev->io.BasePort2 = io->win[1].base;
249 p_dev->io.NumPorts2 = io->win[1].len;
251 /* This reserves IO space but doesn't actually enable it */
252 return pcmcia_request_io(p_dev, &p_dev->io);
258 /*======================================================================
260 das08_pcmcia_config() is scheduled to run after a CARD_INSERTION event
261 is received, to configure the PCMCIA socket, and to make the
262 device available to the system.
264 ======================================================================*/
266 static void das08_pcmcia_config(struct pcmcia_device *link)
268 struct local_info_t *dev = link->priv;
271 dev_dbg(&link->dev, "das08_pcmcia_config\n");
273 ret = pcmcia_loop_config(link, das08_pcmcia_config_loop, NULL);
275 dev_warn(&link->dev, "no configuration found\n");
279 if (link->conf.Attributes & CONF_ENABLE_IRQ) {
280 ret = pcmcia_request_irq(link, &link->irq);
286 This actually configures the PCMCIA socket -- setting up
287 the I/O windows and the interrupt mapping, and putting the
288 card and host interface into "Memory and IO" mode.
290 ret = pcmcia_request_configuration(link, &link->conf);
295 At this point, the dev_node_t structure(s) need to be
296 initialized and arranged in a linked list at link->dev.
298 sprintf(dev->node.dev_name, "pcm-das08");
299 dev->node.major = dev->node.minor = 0;
300 link->dev_node = &dev->node;
302 /* Finally, report what we've done */
303 printk(KERN_INFO "%s: index 0x%02x",
304 dev->node.dev_name, link->conf.ConfigIndex);
305 if (link->conf.Attributes & CONF_ENABLE_IRQ)
306 printk(", irq %u", link->irq.AssignedIRQ);
307 if (link->io.NumPorts1)
308 printk(", io 0x%04x-0x%04x", link->io.BasePort1,
309 link->io.BasePort1 + link->io.NumPorts1 - 1);
310 if (link->io.NumPorts2)
311 printk(" & 0x%04x-0x%04x", link->io.BasePort2,
312 link->io.BasePort2 + link->io.NumPorts2 - 1);
318 das08_pcmcia_release(link);
320 } /* das08_pcmcia_config */
322 /*======================================================================
324 After a card is removed, das08_pcmcia_release() will unregister the
325 device, and release the PCMCIA configuration. If the device is
326 still open, this will be postponed until it is closed.
328 ======================================================================*/
330 static void das08_pcmcia_release(struct pcmcia_device *link)
332 dev_dbg(&link->dev, "das08_pcmcia_release\n");
333 pcmcia_disable_device(link);
334 } /* das08_pcmcia_release */
336 /*======================================================================
338 The card status event handler. Mostly, this schedules other
339 stuff to run after an event is received.
341 When a CARD_REMOVAL event is received, we immediately set a
342 private flag to block future accesses to this device. All the
343 functions that actually access the device should check this flag
344 to make sure the card is still present.
346 ======================================================================*/
348 static int das08_pcmcia_suspend(struct pcmcia_device *link)
350 struct local_info_t *local = link->priv;
351 /* Mark the device as stopped, to block IO until later */
355 } /* das08_pcmcia_suspend */
357 static int das08_pcmcia_resume(struct pcmcia_device *link)
359 struct local_info_t *local = link->priv;
363 } /* das08_pcmcia_resume */
365 /*====================================================================*/
367 static struct pcmcia_device_id das08_cs_id_table[] = {
368 PCMCIA_DEVICE_MANF_CARD(0x01c5, 0x4001),
372 MODULE_DEVICE_TABLE(pcmcia, das08_cs_id_table);
374 struct pcmcia_driver das08_cs_driver = {
375 .probe = das08_pcmcia_attach,
376 .remove = das08_pcmcia_detach,
377 .suspend = das08_pcmcia_suspend,
378 .resume = das08_pcmcia_resume,
379 .id_table = das08_cs_id_table,
380 .owner = THIS_MODULE,
386 static int __init init_das08_pcmcia_cs(void)
388 pcmcia_register_driver(&das08_cs_driver);
392 static void __exit exit_das08_pcmcia_cs(void)
394 pr_debug("das08_pcmcia_cs: unloading\n");
395 pcmcia_unregister_driver(&das08_cs_driver);
398 static int __init das08_cs_init_module(void)
402 ret = init_das08_pcmcia_cs();
406 return comedi_driver_register(&driver_das08_cs);
409 static void __exit das08_cs_exit_module(void)
411 exit_das08_pcmcia_cs();
412 comedi_driver_unregister(&driver_das08_cs);
415 MODULE_LICENSE("GPL");
416 module_init(das08_cs_init_module);
417 module_exit(das08_cs_exit_module);