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/version.h>
51 #include <pcmcia/cs_types.h>
52 #include <pcmcia/cs.h>
53 #include <pcmcia/cistpl.h>
54 #include <pcmcia/cisreg.h>
55 #include <pcmcia/ds.h>
56 #include "hisax_cfg.h"
58 MODULE_DESCRIPTION("ISDN4Linux: PCMCIA client driver for Elsa PCM cards");
59 MODULE_AUTHOR("Klaus Lichtenwalder");
60 MODULE_LICENSE("Dual MPL/GPL");
63 All the PCMCIA modules use PCMCIA_DEBUG to control debugging. If
64 you do not define PCMCIA_DEBUG at all, all the debug code will be
65 left out. If you compile with PCMCIA_DEBUG=0, the debug code will
66 be present but disabled -- but it can then be enabled for specific
67 modules at load time with a 'pc_debug=#' option to insmod.
71 static int pc_debug = PCMCIA_DEBUG;
72 module_param(pc_debug, int, 0);
73 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args);
74 static char *version =
75 "elsa_cs.c $Revision: 1.2.2.4 $ $Date: 2004/01/25 15:07:06 $ (K.Lichtenwalder)";
77 #define DEBUG(n, args...)
80 /*====================================================================*/
82 /* Parameters that can be set with 'insmod' */
84 static int protocol = 2; /* EURO-ISDN Default */
85 module_param(protocol, int, 0);
87 /*====================================================================*/
90 The event() function is this driver's Card Services event handler.
91 It will be called by Card Services when an appropriate card status
92 event is received. The config() and release() entry points are
93 used to configure or release a socket, in response to card insertion
94 and ejection events. They are invoked from the elsa_cs event
98 static void elsa_cs_config(dev_link_t *link);
99 static void elsa_cs_release(dev_link_t *link);
100 static int elsa_cs_event(event_t event, int priority,
101 event_callback_args_t *args);
104 The attach() and detach() entry points are used to create and destroy
105 "instances" of the driver, where each instance represents everything
106 needed to manage one actual PCMCIA card.
109 static dev_link_t *elsa_cs_attach(void);
110 static void elsa_cs_detach(dev_link_t *);
113 The dev_info variable is the "key" that is used to match up this
114 device driver with appropriate cards, through the card configuration
118 static dev_info_t dev_info = "elsa_cs";
121 A linked list of "instances" of the elsa_cs device. Each actual
122 PCMCIA card corresponds to one device instance, and is described
123 by one dev_link_t structure (defined in ds.h).
125 You may not want to use a linked list for this -- for example, the
126 memory card driver uses an array of dev_link_t pointers, where minor
127 device numbers are used to derive the corresponding array index.
130 static dev_link_t *dev_list = NULL;
133 A dev_link_t structure has fields for most things that are needed
134 to keep track of a socket, but there will usually be some device
135 specific information that also needs to be kept track of. The
136 'priv' pointer in a dev_link_t structure can be used to point to
137 a device-specific private data structure, like this.
139 To simplify the data structure handling, we actually include the
140 dev_link_t structure in the device's private data structure.
142 A driver needs to provide a dev_node_t structure for each device
143 on a card. In some cases, there is only one device per card (for
144 example, ethernet cards, modems). In other cases, there may be
145 many actual or logical devices (SCSI adapters, memory cards with
146 multiple partitions). The dev_node_t structures need to be kept
147 in a linked list starting at the 'dev' field of a dev_link_t
148 structure. We allocate them in the card's private data structure,
149 because they generally shouldn't be allocated dynamically.
150 In this case, we also provide a flag to indicate if a device is
151 "stopped" due to a power management event, or card ejection. The
152 device IO routines can use a flag like this to throttle IO to a
153 card that is not ready to accept it.
156 typedef struct local_info_t {
163 /*======================================================================
165 elsa_cs_attach() creates an "instance" of the driver, allocatingx
166 local data structures for one device. The device is registered
169 The dev_link structure is initialized, but we don't actually
170 configure the card at this point -- we wait until we receive a
171 card insertion event.
173 ======================================================================*/
175 static dev_link_t *elsa_cs_attach(void)
177 client_reg_t client_reg;
182 DEBUG(0, "elsa_cs_attach()\n");
184 /* Allocate space for private device-specific data */
185 local = kmalloc(sizeof(local_info_t), GFP_KERNEL);
186 if (!local) return NULL;
187 memset(local, 0, sizeof(local_info_t));
189 link = &local->link; link->priv = local;
191 /* Interrupt setup */
192 link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED;
193 link->irq.IRQInfo1 = IRQ_LEVEL_ID|IRQ_SHARE_ID;
194 link->irq.Handler = NULL;
197 General socket configuration defaults can go here. In this
198 client, we assume very little, and rely on the CIS for almost
199 everything. In most clients, many details (i.e., number, sizes,
200 and attributes of IO windows) are fixed by the nature of the
201 device, and can be hard-wired here.
203 link->io.NumPorts1 = 8;
204 link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
205 link->io.IOAddrLines = 3;
207 link->conf.Attributes = CONF_ENABLE_IRQ;
209 link->conf.IntType = INT_MEMORY_AND_IO;
211 /* Register with Card Services */
212 link->next = dev_list;
214 client_reg.dev_info = &dev_info;
215 client_reg.Version = 0x0210;
216 client_reg.event_callback_args.client_data = link;
217 ret = pcmcia_register_client(&link->handle, &client_reg);
218 if (ret != CS_SUCCESS) {
219 cs_error(link->handle, RegisterClient, ret);
220 elsa_cs_detach(link);
225 } /* elsa_cs_attach */
227 /*======================================================================
229 This deletes a driver "instance". The device is de-registered
230 with Card Services. If it has been released, all local data
231 structures are freed. Otherwise, the structures will be freed
232 when the device is released.
234 ======================================================================*/
236 static void elsa_cs_detach(dev_link_t *link)
239 local_info_t *info = link->priv;
242 DEBUG(0, "elsa_cs_detach(0x%p)\n", link);
244 /* Locate device structure */
245 for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
246 if (*linkp == link) break;
250 if (link->state & DEV_CONFIG)
251 elsa_cs_release(link);
253 /* Break the link with Card Services */
255 ret = pcmcia_deregister_client(link->handle);
256 if (ret != CS_SUCCESS)
257 cs_error(link->handle, DeregisterClient, ret);
260 /* Unlink device structure and free it */
264 } /* elsa_cs_detach */
266 /*======================================================================
268 elsa_cs_config() is scheduled to run after a CARD_INSERTION event
269 is received, to configure the PCMCIA socket, and to make the
270 device available to the system.
272 ======================================================================*/
273 static int get_tuple(client_handle_t handle, tuple_t *tuple,
276 int i = pcmcia_get_tuple_data(handle, tuple);
277 if (i != CS_SUCCESS) return i;
278 return pcmcia_parse_tuple(handle, tuple, parse);
281 static int first_tuple(client_handle_t handle, tuple_t *tuple,
284 int i = pcmcia_get_first_tuple(handle, tuple);
285 if (i != CS_SUCCESS) return i;
286 return get_tuple(handle, tuple, parse);
289 static int next_tuple(client_handle_t handle, tuple_t *tuple,
292 int i = pcmcia_get_next_tuple(handle, tuple);
293 if (i != CS_SUCCESS) return i;
294 return get_tuple(handle, tuple, parse);
297 static void elsa_cs_config(dev_link_t *link)
299 client_handle_t handle;
305 cistpl_cftable_entry_t *cf = &parse.cftable_entry;
308 DEBUG(0, "elsa_config(0x%p)\n", link);
309 handle = link->handle;
313 This reads the card's CONFIG tuple to find its configuration
316 tuple.DesiredTuple = CISTPL_CONFIG;
317 tuple.TupleData = (cisdata_t *)buf;
318 tuple.TupleDataMax = 255;
319 tuple.TupleOffset = 0;
320 tuple.Attributes = 0;
321 i = first_tuple(handle, &tuple, &parse);
322 if (i != CS_SUCCESS) {
323 last_fn = ParseTuple;
326 link->conf.ConfigBase = parse.config.base;
327 link->conf.Present = parse.config.rmask[0];
330 link->state |= DEV_CONFIG;
332 tuple.TupleData = (cisdata_t *)buf;
333 tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
334 tuple.Attributes = 0;
335 tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
336 i = first_tuple(handle, &tuple, &parse);
337 while (i == CS_SUCCESS) {
338 if ( (cf->io.nwin > 0) && cf->io.win[0].base) {
339 printk(KERN_INFO "(elsa_cs: looks like the 96 model)\n");
340 link->conf.ConfigIndex = cf->index;
341 link->io.BasePort1 = cf->io.win[0].base;
342 i = pcmcia_request_io(link->handle, &link->io);
343 if (i == CS_SUCCESS) break;
345 printk(KERN_INFO "(elsa_cs: looks like the 97 model)\n");
346 link->conf.ConfigIndex = cf->index;
347 for (i = 0, j = 0x2f0; j > 0x100; j -= 0x10) {
348 link->io.BasePort1 = j;
349 i = pcmcia_request_io(link->handle, &link->io);
350 if (i == CS_SUCCESS) break;
354 i = next_tuple(handle, &tuple, &parse);
357 if (i != CS_SUCCESS) {
362 i = pcmcia_request_irq(link->handle, &link->irq);
363 if (i != CS_SUCCESS) {
364 link->irq.AssignedIRQ = 0;
365 last_fn = RequestIRQ;
369 i = pcmcia_request_configuration(link->handle, &link->conf);
370 if (i != CS_SUCCESS) {
371 last_fn = RequestConfiguration;
375 /* At this point, the dev_node_t structure(s) should be
376 initialized and arranged in a linked list at link->dev. *//* */
377 sprintf(dev->node.dev_name, "elsa");
378 dev->node.major = dev->node.minor = 0x0;
380 link->dev = &dev->node;
382 /* Finally, report what we've done */
383 printk(KERN_INFO "%s: index 0x%02x: Vcc %d.%d",
384 dev->node.dev_name, link->conf.ConfigIndex,
385 link->conf.Vcc/10, link->conf.Vcc%10);
387 printk(", Vpp %d.%d", link->conf.Vpp1/10, link->conf.Vpp1%10);
388 if (link->conf.Attributes & CONF_ENABLE_IRQ)
389 printk(", irq %d", link->irq.AssignedIRQ);
390 if (link->io.NumPorts1)
391 printk(", io 0x%04x-0x%04x", link->io.BasePort1,
392 link->io.BasePort1+link->io.NumPorts1-1);
393 if (link->io.NumPorts2)
394 printk(" & 0x%04x-0x%04x", link->io.BasePort2,
395 link->io.BasePort2+link->io.NumPorts2-1);
398 link->state &= ~DEV_CONFIG_PENDING;
400 icard.para[0] = link->irq.AssignedIRQ;
401 icard.para[1] = link->io.BasePort1;
402 icard.protocol = protocol;
403 icard.typ = ISDN_CTYPE_ELSA_PCMCIA;
405 i = hisax_init_pcmcia(link, &(((local_info_t*)link->priv)->busy), &icard);
407 printk(KERN_ERR "elsa_cs: failed to initialize Elsa PCMCIA %d at i/o %#x\n",
408 i, link->io.BasePort1);
409 elsa_cs_release(link);
411 ((local_info_t*)link->priv)->cardnr = i;
415 cs_error(link->handle, last_fn, i);
416 elsa_cs_release(link);
417 } /* elsa_cs_config */
419 /*======================================================================
421 After a card is removed, elsa_cs_release() will unregister the net
422 device, and release the PCMCIA configuration. If the device is
423 still open, this will be postponed until it is closed.
425 ======================================================================*/
427 static void elsa_cs_release(dev_link_t *link)
429 local_info_t *local = link->priv;
431 DEBUG(0, "elsa_cs_release(0x%p)\n", link);
434 if (local->cardnr >= 0) {
435 /* no unregister function with hisax */
436 HiSax_closecard(local->cardnr);
439 /* Unlink the device chain */
442 /* Don't bother checking to see if these succeed or not */
444 pcmcia_release_window(link->win);
445 pcmcia_release_configuration(link->handle);
446 pcmcia_release_io(link->handle, &link->io);
447 pcmcia_release_irq(link->handle, &link->irq);
448 link->state &= ~DEV_CONFIG;
449 } /* elsa_cs_release */
451 /*======================================================================
453 The card status event handler. Mostly, this schedules other
454 stuff to run after an event is received. A CARD_REMOVAL event
455 also sets some flags to discourage the net drivers from trying
456 to talk to the card any more.
458 When a CARD_REMOVAL event is received, we immediately set a flag
459 to block future accesses to this device. All the functions that
460 actually access the device should check this flag to make sure
461 the card is still present.
463 ======================================================================*/
465 static int elsa_cs_event(event_t event, int priority,
466 event_callback_args_t *args)
468 dev_link_t *link = args->client_data;
469 local_info_t *dev = link->priv;
471 DEBUG(1, "elsa_cs_event(%d)\n", event);
474 case CS_EVENT_CARD_REMOVAL:
475 link->state &= ~DEV_PRESENT;
476 if (link->state & DEV_CONFIG) {
477 ((local_info_t*)link->priv)->busy = 1;
478 elsa_cs_release(link);
481 case CS_EVENT_CARD_INSERTION:
482 link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
483 elsa_cs_config(link);
485 case CS_EVENT_PM_SUSPEND:
486 link->state |= DEV_SUSPEND;
487 /* Fall through... */
488 case CS_EVENT_RESET_PHYSICAL:
489 /* Mark the device as stopped, to block IO until later */
491 if (link->state & DEV_CONFIG)
492 pcmcia_release_configuration(link->handle);
494 case CS_EVENT_PM_RESUME:
495 link->state &= ~DEV_SUSPEND;
496 /* Fall through... */
497 case CS_EVENT_CARD_RESET:
498 if (link->state & DEV_CONFIG)
499 pcmcia_request_configuration(link->handle, &link->conf);
504 } /* elsa_cs_event */
506 static struct pcmcia_device_id elsa_ids[] = {
507 PCMCIA_DEVICE_PROD_ID12("ELSA AG (Aachen, Germany)", "MicroLink ISDN/MC ", 0x983de2c4, 0x333ba257),
508 PCMCIA_DEVICE_PROD_ID12("ELSA GmbH, Aachen", "MicroLink ISDN/MC ", 0x639e5718, 0x333ba257),
511 MODULE_DEVICE_TABLE(pcmcia, elsa_ids);
513 static struct pcmcia_driver elsa_cs_driver = {
514 .owner = THIS_MODULE,
518 .attach = elsa_cs_attach,
519 .event = elsa_cs_event,
520 .detach = elsa_cs_detach,
521 .id_table = elsa_ids,
524 static int __init init_elsa_cs(void)
526 return pcmcia_register_driver(&elsa_cs_driver);
529 static void __exit exit_elsa_cs(void)
531 pcmcia_unregister_driver(&elsa_cs_driver);
532 BUG_ON(dev_list != NULL);
535 module_init(init_elsa_cs);
536 module_exit(exit_elsa_cs);