1 /*======================================================================
3 An elsa_cs PCMCIA client driver
5 This driver is for the Elsa PCM ISDN Cards, i.e. the MicroLink
8 The contents of this file are subject to the Mozilla Public
9 License Version 1.1 (the "License"); you may not use this file
10 except in compliance with the License. You may obtain a copy of
11 the License at http://www.mozilla.org/MPL/
13 Software distributed under the License is distributed on an "AS
14 IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
15 implied. See the License for the specific language governing
16 rights and limitations under the License.
18 The initial developer of the original code is David A. Hinds
19 <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
20 are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
22 Modifications from dummy_cs.c are Copyright (C) 1999-2001 Klaus
23 Lichtenwalder <Lichtenwalder@ACM.org>. All Rights Reserved.
25 Alternatively, the contents of this file may be used under the
26 terms of the GNU General Public License version 2 (the "GPL"), in
27 which case the provisions of the GPL are applicable instead of the
28 above. If you wish to allow the use of your version of this file
29 only under the terms of the GPL and not to allow others to use
30 your version of this file under the MPL, indicate your decision
31 by deleting the provisions above and replace them with the notice
32 and other provisions required by the GPL. If you do not delete
33 the provisions above, a recipient may use your version of this
34 file under either the MPL or the GPL.
36 ======================================================================*/
38 #include <linux/module.h>
39 #include <linux/kernel.h>
40 #include <linux/init.h>
41 #include <linux/sched.h>
42 #include <linux/ptrace.h>
43 #include <linux/slab.h>
44 #include <linux/string.h>
45 #include <linux/timer.h>
46 #include <linux/ioport.h>
48 #include <asm/system.h>
50 #include <pcmcia/cs_types.h>
51 #include <pcmcia/cs.h>
52 #include <pcmcia/cistpl.h>
53 #include <pcmcia/cisreg.h>
54 #include <pcmcia/ds.h>
55 #include "hisax_cfg.h"
57 MODULE_DESCRIPTION("ISDN4Linux: PCMCIA client driver for Elsa PCM cards");
58 MODULE_AUTHOR("Klaus Lichtenwalder");
59 MODULE_LICENSE("Dual MPL/GPL");
62 All the PCMCIA modules use PCMCIA_DEBUG to control debugging. If
63 you do not define PCMCIA_DEBUG at all, all the debug code will be
64 left out. If you compile with PCMCIA_DEBUG=0, the debug code will
65 be present but disabled -- but it can then be enabled for specific
66 modules at load time with a 'pc_debug=#' option to insmod.
70 static int pc_debug = PCMCIA_DEBUG;
71 module_param(pc_debug, int, 0);
72 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args);
73 static char *version =
74 "elsa_cs.c $Revision: 1.2.2.4 $ $Date: 2004/01/25 15:07:06 $ (K.Lichtenwalder)";
76 #define DEBUG(n, args...)
79 /*====================================================================*/
81 /* Parameters that can be set with 'insmod' */
83 static int protocol = 2; /* EURO-ISDN Default */
84 module_param(protocol, int, 0);
86 /*====================================================================*/
89 The event() function is this driver's Card Services event handler.
90 It will be called by Card Services when an appropriate card status
91 event is received. The config() and release() entry points are
92 used to configure or release a socket, in response to card insertion
93 and ejection events. They are invoked from the elsa_cs event
97 static void elsa_cs_config(dev_link_t *link);
98 static void elsa_cs_release(dev_link_t *link);
99 static int elsa_cs_event(event_t event, int priority,
100 event_callback_args_t *args);
103 The attach() and detach() entry points are used to create and destroy
104 "instances" of the driver, where each instance represents everything
105 needed to manage one actual PCMCIA card.
108 static dev_link_t *elsa_cs_attach(void);
109 static void elsa_cs_detach(struct pcmcia_device *p_dev);
112 The dev_info variable is the "key" that is used to match up this
113 device driver with appropriate cards, through the card configuration
117 static dev_info_t dev_info = "elsa_cs";
120 A linked list of "instances" of the elsa_cs device. Each actual
121 PCMCIA card corresponds to one device instance, and is described
122 by one dev_link_t structure (defined in ds.h).
124 You may not want to use a linked list for this -- for example, the
125 memory card driver uses an array of dev_link_t pointers, where minor
126 device numbers are used to derive the corresponding array index.
129 static dev_link_t *dev_list = NULL;
132 A dev_link_t structure has fields for most things that are needed
133 to keep track of a socket, but there will usually be some device
134 specific information that also needs to be kept track of. The
135 'priv' pointer in a dev_link_t structure can be used to point to
136 a device-specific private data structure, like this.
138 To simplify the data structure handling, we actually include the
139 dev_link_t structure in the device's private data structure.
141 A driver needs to provide a dev_node_t structure for each device
142 on a card. In some cases, there is only one device per card (for
143 example, ethernet cards, modems). In other cases, there may be
144 many actual or logical devices (SCSI adapters, memory cards with
145 multiple partitions). The dev_node_t structures need to be kept
146 in a linked list starting at the 'dev' field of a dev_link_t
147 structure. We allocate them in the card's private data structure,
148 because they generally shouldn't be allocated dynamically.
149 In this case, we also provide a flag to indicate if a device is
150 "stopped" due to a power management event, or card ejection. The
151 device IO routines can use a flag like this to throttle IO to a
152 card that is not ready to accept it.
155 typedef struct local_info_t {
162 /*======================================================================
164 elsa_cs_attach() creates an "instance" of the driver, allocatingx
165 local data structures for one device. The device is registered
168 The dev_link structure is initialized, but we don't actually
169 configure the card at this point -- we wait until we receive a
170 card insertion event.
172 ======================================================================*/
174 static dev_link_t *elsa_cs_attach(void)
176 client_reg_t client_reg;
181 DEBUG(0, "elsa_cs_attach()\n");
183 /* Allocate space for private device-specific data */
184 local = kmalloc(sizeof(local_info_t), GFP_KERNEL);
185 if (!local) return NULL;
186 memset(local, 0, sizeof(local_info_t));
188 link = &local->link; link->priv = local;
190 /* Interrupt setup */
191 link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED;
192 link->irq.IRQInfo1 = IRQ_LEVEL_ID|IRQ_SHARE_ID;
193 link->irq.Handler = NULL;
196 General socket configuration defaults can go here. In this
197 client, we assume very little, and rely on the CIS for almost
198 everything. In most clients, many details (i.e., number, sizes,
199 and attributes of IO windows) are fixed by the nature of the
200 device, and can be hard-wired here.
202 link->io.NumPorts1 = 8;
203 link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
204 link->io.IOAddrLines = 3;
206 link->conf.Attributes = CONF_ENABLE_IRQ;
208 link->conf.IntType = INT_MEMORY_AND_IO;
210 /* Register with Card Services */
211 link->next = dev_list;
213 client_reg.dev_info = &dev_info;
214 client_reg.Version = 0x0210;
215 client_reg.event_callback_args.client_data = link;
216 ret = pcmcia_register_client(&link->handle, &client_reg);
217 if (ret != CS_SUCCESS) {
218 cs_error(link->handle, RegisterClient, ret);
219 elsa_cs_detach(link->handle);
224 } /* elsa_cs_attach */
226 /*======================================================================
228 This deletes a driver "instance". The device is de-registered
229 with Card Services. If it has been released, all local data
230 structures are freed. Otherwise, the structures will be freed
231 when the device is released.
233 ======================================================================*/
235 static void elsa_cs_detach(struct pcmcia_device *p_dev)
237 dev_link_t *link = dev_to_instance(p_dev);
239 local_info_t *info = link->priv;
241 DEBUG(0, "elsa_cs_detach(0x%p)\n", link);
243 /* Locate device structure */
244 for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
245 if (*linkp == link) break;
249 if (link->state & DEV_CONFIG) {
250 ((local_info_t*)link->priv)->busy = 1;
251 elsa_cs_release(link);
254 /* Unlink device structure and free it */
258 } /* elsa_cs_detach */
260 /*======================================================================
262 elsa_cs_config() is scheduled to run after a CARD_INSERTION event
263 is received, to configure the PCMCIA socket, and to make the
264 device available to the system.
266 ======================================================================*/
267 static int get_tuple(client_handle_t handle, tuple_t *tuple,
270 int i = pcmcia_get_tuple_data(handle, tuple);
271 if (i != CS_SUCCESS) return i;
272 return pcmcia_parse_tuple(handle, tuple, parse);
275 static int first_tuple(client_handle_t handle, tuple_t *tuple,
278 int i = pcmcia_get_first_tuple(handle, tuple);
279 if (i != CS_SUCCESS) return i;
280 return get_tuple(handle, tuple, parse);
283 static int next_tuple(client_handle_t handle, tuple_t *tuple,
286 int i = pcmcia_get_next_tuple(handle, tuple);
287 if (i != CS_SUCCESS) return i;
288 return get_tuple(handle, tuple, parse);
291 static void elsa_cs_config(dev_link_t *link)
293 client_handle_t handle;
299 cistpl_cftable_entry_t *cf = &parse.cftable_entry;
302 DEBUG(0, "elsa_config(0x%p)\n", link);
303 handle = link->handle;
307 This reads the card's CONFIG tuple to find its configuration
310 tuple.DesiredTuple = CISTPL_CONFIG;
311 tuple.TupleData = (cisdata_t *)buf;
312 tuple.TupleDataMax = 255;
313 tuple.TupleOffset = 0;
314 tuple.Attributes = 0;
315 i = first_tuple(handle, &tuple, &parse);
316 if (i != CS_SUCCESS) {
317 last_fn = ParseTuple;
320 link->conf.ConfigBase = parse.config.base;
321 link->conf.Present = parse.config.rmask[0];
324 link->state |= DEV_CONFIG;
326 tuple.TupleData = (cisdata_t *)buf;
327 tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
328 tuple.Attributes = 0;
329 tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
330 i = first_tuple(handle, &tuple, &parse);
331 while (i == CS_SUCCESS) {
332 if ( (cf->io.nwin > 0) && cf->io.win[0].base) {
333 printk(KERN_INFO "(elsa_cs: looks like the 96 model)\n");
334 link->conf.ConfigIndex = cf->index;
335 link->io.BasePort1 = cf->io.win[0].base;
336 i = pcmcia_request_io(link->handle, &link->io);
337 if (i == CS_SUCCESS) break;
339 printk(KERN_INFO "(elsa_cs: looks like the 97 model)\n");
340 link->conf.ConfigIndex = cf->index;
341 for (i = 0, j = 0x2f0; j > 0x100; j -= 0x10) {
342 link->io.BasePort1 = j;
343 i = pcmcia_request_io(link->handle, &link->io);
344 if (i == CS_SUCCESS) break;
348 i = next_tuple(handle, &tuple, &parse);
351 if (i != CS_SUCCESS) {
356 i = pcmcia_request_irq(link->handle, &link->irq);
357 if (i != CS_SUCCESS) {
358 link->irq.AssignedIRQ = 0;
359 last_fn = RequestIRQ;
363 i = pcmcia_request_configuration(link->handle, &link->conf);
364 if (i != CS_SUCCESS) {
365 last_fn = RequestConfiguration;
369 /* At this point, the dev_node_t structure(s) should be
370 initialized and arranged in a linked list at link->dev. *//* */
371 sprintf(dev->node.dev_name, "elsa");
372 dev->node.major = dev->node.minor = 0x0;
374 link->dev = &dev->node;
376 /* Finally, report what we've done */
377 printk(KERN_INFO "%s: index 0x%02x: Vcc %d.%d",
378 dev->node.dev_name, link->conf.ConfigIndex,
379 link->conf.Vcc/10, link->conf.Vcc%10);
381 printk(", Vpp %d.%d", link->conf.Vpp1/10, link->conf.Vpp1%10);
382 if (link->conf.Attributes & CONF_ENABLE_IRQ)
383 printk(", irq %d", link->irq.AssignedIRQ);
384 if (link->io.NumPorts1)
385 printk(", io 0x%04x-0x%04x", link->io.BasePort1,
386 link->io.BasePort1+link->io.NumPorts1-1);
387 if (link->io.NumPorts2)
388 printk(" & 0x%04x-0x%04x", link->io.BasePort2,
389 link->io.BasePort2+link->io.NumPorts2-1);
392 link->state &= ~DEV_CONFIG_PENDING;
394 icard.para[0] = link->irq.AssignedIRQ;
395 icard.para[1] = link->io.BasePort1;
396 icard.protocol = protocol;
397 icard.typ = ISDN_CTYPE_ELSA_PCMCIA;
399 i = hisax_init_pcmcia(link, &(((local_info_t*)link->priv)->busy), &icard);
401 printk(KERN_ERR "elsa_cs: failed to initialize Elsa PCMCIA %d at i/o %#x\n",
402 i, link->io.BasePort1);
403 elsa_cs_release(link);
405 ((local_info_t*)link->priv)->cardnr = i;
409 cs_error(link->handle, last_fn, i);
410 elsa_cs_release(link);
411 } /* elsa_cs_config */
413 /*======================================================================
415 After a card is removed, elsa_cs_release() will unregister the net
416 device, and release the PCMCIA configuration. If the device is
417 still open, this will be postponed until it is closed.
419 ======================================================================*/
421 static void elsa_cs_release(dev_link_t *link)
423 local_info_t *local = link->priv;
425 DEBUG(0, "elsa_cs_release(0x%p)\n", link);
428 if (local->cardnr >= 0) {
429 /* no unregister function with hisax */
430 HiSax_closecard(local->cardnr);
433 /* Unlink the device chain */
436 /* Don't bother checking to see if these succeed or not */
438 pcmcia_release_window(link->win);
439 pcmcia_release_configuration(link->handle);
440 pcmcia_release_io(link->handle, &link->io);
441 pcmcia_release_irq(link->handle, &link->irq);
442 link->state &= ~DEV_CONFIG;
443 } /* elsa_cs_release */
445 static int elsa_suspend(struct pcmcia_device *p_dev)
447 dev_link_t *link = dev_to_instance(p_dev);
448 local_info_t *dev = link->priv;
450 link->state |= DEV_SUSPEND;
452 if (link->state & DEV_CONFIG)
453 pcmcia_release_configuration(link->handle);
458 static int elsa_resume(struct pcmcia_device *p_dev)
460 dev_link_t *link = dev_to_instance(p_dev);
461 local_info_t *dev = link->priv;
463 link->state &= ~DEV_SUSPEND;
464 if (link->state & DEV_CONFIG)
465 pcmcia_request_configuration(link->handle, &link->conf);
471 /*======================================================================
473 The card status event handler. Mostly, this schedules other
474 stuff to run after an event is received. A CARD_REMOVAL event
475 also sets some flags to discourage the net drivers from trying
476 to talk to the card any more.
478 When a CARD_REMOVAL event is received, we immediately set a flag
479 to block future accesses to this device. All the functions that
480 actually access the device should check this flag to make sure
481 the card is still present.
483 ======================================================================*/
485 static int elsa_cs_event(event_t event, int priority,
486 event_callback_args_t *args)
488 dev_link_t *link = args->client_data;
490 DEBUG(1, "elsa_cs_event(%d)\n", event);
493 case CS_EVENT_CARD_INSERTION:
494 link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
495 elsa_cs_config(link);
499 } /* elsa_cs_event */
501 static struct pcmcia_device_id elsa_ids[] = {
502 PCMCIA_DEVICE_PROD_ID12("ELSA AG (Aachen, Germany)", "MicroLink ISDN/MC ", 0x983de2c4, 0x333ba257),
503 PCMCIA_DEVICE_PROD_ID12("ELSA GmbH, Aachen", "MicroLink ISDN/MC ", 0x639e5718, 0x333ba257),
506 MODULE_DEVICE_TABLE(pcmcia, elsa_ids);
508 static struct pcmcia_driver elsa_cs_driver = {
509 .owner = THIS_MODULE,
513 .attach = elsa_cs_attach,
514 .event = elsa_cs_event,
515 .remove = elsa_cs_detach,
516 .id_table = elsa_ids,
517 .suspend = elsa_suspend,
518 .resume = elsa_resume,
521 static int __init init_elsa_cs(void)
523 return pcmcia_register_driver(&elsa_cs_driver);
526 static void __exit exit_elsa_cs(void)
528 pcmcia_unregister_driver(&elsa_cs_driver);
529 BUG_ON(dev_list != NULL);
532 module_init(init_elsa_cs);
533 module_exit(exit_elsa_cs);