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.
130 A driver needs to provide a dev_node_t structure for each device
131 on a card. In some cases, there is only one device per card (for
132 example, ethernet cards, modems). In other cases, there may be
133 many actual or logical devices (SCSI adapters, memory cards with
134 multiple partitions). The dev_node_t structures need to be kept
135 in a linked list starting at the 'dev' field of a dev_link_t
136 structure. We allocate them in the card's private data structure,
137 because they generally shouldn't be allocated dynamically.
138 In this case, we also provide a flag to indicate if a device is
139 "stopped" due to a power management event, or card ejection. The
140 device IO routines can use a flag like this to throttle IO to a
141 card that is not ready to accept it.
144 typedef struct local_info_t {
151 /*======================================================================
153 elsa_cs_attach() creates an "instance" of the driver, allocatingx
154 local data structures for one device. The device is registered
157 The dev_link structure is initialized, but we don't actually
158 configure the card at this point -- we wait until we receive a
159 card insertion event.
161 ======================================================================*/
163 static dev_link_t *elsa_cs_attach(void)
165 client_reg_t client_reg;
170 DEBUG(0, "elsa_cs_attach()\n");
172 /* Allocate space for private device-specific data */
173 local = kmalloc(sizeof(local_info_t), GFP_KERNEL);
174 if (!local) return NULL;
175 memset(local, 0, sizeof(local_info_t));
177 link = &local->link; link->priv = local;
179 /* Interrupt setup */
180 link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED;
181 link->irq.IRQInfo1 = IRQ_LEVEL_ID|IRQ_SHARE_ID;
182 link->irq.Handler = NULL;
185 General socket configuration defaults can go here. In this
186 client, we assume very little, and rely on the CIS for almost
187 everything. In most clients, many details (i.e., number, sizes,
188 and attributes of IO windows) are fixed by the nature of the
189 device, and can be hard-wired here.
191 link->io.NumPorts1 = 8;
192 link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
193 link->io.IOAddrLines = 3;
195 link->conf.Attributes = CONF_ENABLE_IRQ;
197 link->conf.IntType = INT_MEMORY_AND_IO;
199 /* Register with Card Services */
201 client_reg.dev_info = &dev_info;
202 client_reg.Version = 0x0210;
203 client_reg.event_callback_args.client_data = link;
204 ret = pcmcia_register_client(&link->handle, &client_reg);
205 if (ret != CS_SUCCESS) {
206 cs_error(link->handle, RegisterClient, ret);
207 elsa_cs_detach(link->handle);
212 } /* elsa_cs_attach */
214 /*======================================================================
216 This deletes a driver "instance". The device is de-registered
217 with Card Services. If it has been released, all local data
218 structures are freed. Otherwise, the structures will be freed
219 when the device is released.
221 ======================================================================*/
223 static void elsa_cs_detach(struct pcmcia_device *p_dev)
225 dev_link_t *link = dev_to_instance(p_dev);
226 local_info_t *info = link->priv;
228 DEBUG(0, "elsa_cs_detach(0x%p)\n", link);
230 if (link->state & DEV_CONFIG) {
232 elsa_cs_release(link);
237 } /* elsa_cs_detach */
239 /*======================================================================
241 elsa_cs_config() is scheduled to run after a CARD_INSERTION event
242 is received, to configure the PCMCIA socket, and to make the
243 device available to the system.
245 ======================================================================*/
246 static int get_tuple(client_handle_t handle, tuple_t *tuple,
249 int i = pcmcia_get_tuple_data(handle, tuple);
250 if (i != CS_SUCCESS) return i;
251 return pcmcia_parse_tuple(handle, tuple, parse);
254 static int first_tuple(client_handle_t handle, tuple_t *tuple,
257 int i = pcmcia_get_first_tuple(handle, tuple);
258 if (i != CS_SUCCESS) return i;
259 return get_tuple(handle, tuple, parse);
262 static int next_tuple(client_handle_t handle, tuple_t *tuple,
265 int i = pcmcia_get_next_tuple(handle, tuple);
266 if (i != CS_SUCCESS) return i;
267 return get_tuple(handle, tuple, parse);
270 static void elsa_cs_config(dev_link_t *link)
272 client_handle_t handle;
278 cistpl_cftable_entry_t *cf = &parse.cftable_entry;
281 DEBUG(0, "elsa_config(0x%p)\n", link);
282 handle = link->handle;
286 This reads the card's CONFIG tuple to find its configuration
289 tuple.DesiredTuple = CISTPL_CONFIG;
290 tuple.TupleData = (cisdata_t *)buf;
291 tuple.TupleDataMax = 255;
292 tuple.TupleOffset = 0;
293 tuple.Attributes = 0;
294 i = first_tuple(handle, &tuple, &parse);
295 if (i != CS_SUCCESS) {
296 last_fn = ParseTuple;
299 link->conf.ConfigBase = parse.config.base;
300 link->conf.Present = parse.config.rmask[0];
303 link->state |= DEV_CONFIG;
305 tuple.TupleData = (cisdata_t *)buf;
306 tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
307 tuple.Attributes = 0;
308 tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
309 i = first_tuple(handle, &tuple, &parse);
310 while (i == CS_SUCCESS) {
311 if ( (cf->io.nwin > 0) && cf->io.win[0].base) {
312 printk(KERN_INFO "(elsa_cs: looks like the 96 model)\n");
313 link->conf.ConfigIndex = cf->index;
314 link->io.BasePort1 = cf->io.win[0].base;
315 i = pcmcia_request_io(link->handle, &link->io);
316 if (i == CS_SUCCESS) break;
318 printk(KERN_INFO "(elsa_cs: looks like the 97 model)\n");
319 link->conf.ConfigIndex = cf->index;
320 for (i = 0, j = 0x2f0; j > 0x100; j -= 0x10) {
321 link->io.BasePort1 = j;
322 i = pcmcia_request_io(link->handle, &link->io);
323 if (i == CS_SUCCESS) break;
327 i = next_tuple(handle, &tuple, &parse);
330 if (i != CS_SUCCESS) {
335 i = pcmcia_request_irq(link->handle, &link->irq);
336 if (i != CS_SUCCESS) {
337 link->irq.AssignedIRQ = 0;
338 last_fn = RequestIRQ;
342 i = pcmcia_request_configuration(link->handle, &link->conf);
343 if (i != CS_SUCCESS) {
344 last_fn = RequestConfiguration;
348 /* At this point, the dev_node_t structure(s) should be
349 initialized and arranged in a linked list at link->dev. *//* */
350 sprintf(dev->node.dev_name, "elsa");
351 dev->node.major = dev->node.minor = 0x0;
353 link->dev = &dev->node;
355 /* Finally, report what we've done */
356 printk(KERN_INFO "%s: index 0x%02x: Vcc %d.%d",
357 dev->node.dev_name, link->conf.ConfigIndex,
358 link->conf.Vcc/10, link->conf.Vcc%10);
360 printk(", Vpp %d.%d", link->conf.Vpp1/10, link->conf.Vpp1%10);
361 if (link->conf.Attributes & CONF_ENABLE_IRQ)
362 printk(", irq %d", link->irq.AssignedIRQ);
363 if (link->io.NumPorts1)
364 printk(", io 0x%04x-0x%04x", link->io.BasePort1,
365 link->io.BasePort1+link->io.NumPorts1-1);
366 if (link->io.NumPorts2)
367 printk(" & 0x%04x-0x%04x", link->io.BasePort2,
368 link->io.BasePort2+link->io.NumPorts2-1);
371 link->state &= ~DEV_CONFIG_PENDING;
373 icard.para[0] = link->irq.AssignedIRQ;
374 icard.para[1] = link->io.BasePort1;
375 icard.protocol = protocol;
376 icard.typ = ISDN_CTYPE_ELSA_PCMCIA;
378 i = hisax_init_pcmcia(link, &(((local_info_t*)link->priv)->busy), &icard);
380 printk(KERN_ERR "elsa_cs: failed to initialize Elsa PCMCIA %d at i/o %#x\n",
381 i, link->io.BasePort1);
382 elsa_cs_release(link);
384 ((local_info_t*)link->priv)->cardnr = i;
388 cs_error(link->handle, last_fn, i);
389 elsa_cs_release(link);
390 } /* elsa_cs_config */
392 /*======================================================================
394 After a card is removed, elsa_cs_release() will unregister the net
395 device, and release the PCMCIA configuration. If the device is
396 still open, this will be postponed until it is closed.
398 ======================================================================*/
400 static void elsa_cs_release(dev_link_t *link)
402 local_info_t *local = link->priv;
404 DEBUG(0, "elsa_cs_release(0x%p)\n", link);
407 if (local->cardnr >= 0) {
408 /* no unregister function with hisax */
409 HiSax_closecard(local->cardnr);
412 /* Unlink the device chain */
415 /* Don't bother checking to see if these succeed or not */
417 pcmcia_release_window(link->win);
418 pcmcia_release_configuration(link->handle);
419 pcmcia_release_io(link->handle, &link->io);
420 pcmcia_release_irq(link->handle, &link->irq);
421 link->state &= ~DEV_CONFIG;
422 } /* elsa_cs_release */
424 static int elsa_suspend(struct pcmcia_device *p_dev)
426 dev_link_t *link = dev_to_instance(p_dev);
427 local_info_t *dev = link->priv;
429 link->state |= DEV_SUSPEND;
431 if (link->state & DEV_CONFIG)
432 pcmcia_release_configuration(link->handle);
437 static int elsa_resume(struct pcmcia_device *p_dev)
439 dev_link_t *link = dev_to_instance(p_dev);
440 local_info_t *dev = link->priv;
442 link->state &= ~DEV_SUSPEND;
443 if (link->state & DEV_CONFIG)
444 pcmcia_request_configuration(link->handle, &link->conf);
450 /*======================================================================
452 The card status event handler. Mostly, this schedules other
453 stuff to run after an event is received. A CARD_REMOVAL event
454 also sets some flags to discourage the net drivers from trying
455 to talk to the card any more.
457 When a CARD_REMOVAL event is received, we immediately set a flag
458 to block future accesses to this device. All the functions that
459 actually access the device should check this flag to make sure
460 the card is still present.
462 ======================================================================*/
464 static int elsa_cs_event(event_t event, int priority,
465 event_callback_args_t *args)
467 dev_link_t *link = args->client_data;
469 DEBUG(1, "elsa_cs_event(%d)\n", event);
472 case CS_EVENT_CARD_INSERTION:
473 link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
474 elsa_cs_config(link);
478 } /* elsa_cs_event */
480 static struct pcmcia_device_id elsa_ids[] = {
481 PCMCIA_DEVICE_PROD_ID12("ELSA AG (Aachen, Germany)", "MicroLink ISDN/MC ", 0x983de2c4, 0x333ba257),
482 PCMCIA_DEVICE_PROD_ID12("ELSA GmbH, Aachen", "MicroLink ISDN/MC ", 0x639e5718, 0x333ba257),
485 MODULE_DEVICE_TABLE(pcmcia, elsa_ids);
487 static struct pcmcia_driver elsa_cs_driver = {
488 .owner = THIS_MODULE,
492 .attach = elsa_cs_attach,
493 .event = elsa_cs_event,
494 .remove = elsa_cs_detach,
495 .id_table = elsa_ids,
496 .suspend = elsa_suspend,
497 .resume = elsa_resume,
500 static int __init init_elsa_cs(void)
502 return pcmcia_register_driver(&elsa_cs_driver);
505 static void __exit exit_elsa_cs(void)
507 pcmcia_unregister_driver(&elsa_cs_driver);
510 module_init(init_elsa_cs);
511 module_exit(exit_elsa_cs);