1 /* $Id: avm_cs.c,v 1.4.6.3 2001/09/23 22:24:33 kai Exp $
3 * A PCMCIA client driver for AVM B1/M1/M2
5 * Copyright 1999 by Carsten Paeth <calle@calle.de>
7 * This software may be used and distributed according to the terms
8 * of the GNU General Public License, incorporated herein by reference.
12 #include <linux/module.h>
13 #include <linux/kernel.h>
14 #include <linux/init.h>
15 #include <linux/sched.h>
16 #include <linux/ptrace.h>
17 #include <linux/slab.h>
18 #include <linux/string.h>
19 #include <linux/tty.h>
20 #include <linux/serial.h>
21 #include <linux/major.h>
23 #include <asm/system.h>
25 #include <pcmcia/version.h>
26 #include <pcmcia/cs_types.h>
27 #include <pcmcia/cs.h>
28 #include <pcmcia/cistpl.h>
29 #include <pcmcia/ciscode.h>
30 #include <pcmcia/ds.h>
31 #include <pcmcia/cisreg.h>
33 #include <linux/skbuff.h>
34 #include <linux/capi.h>
35 #include <linux/b1lli.h>
36 #include <linux/b1pcmcia.h>
38 /*====================================================================*/
40 MODULE_DESCRIPTION("CAPI4Linux: PCMCIA client driver for AVM B1/M1/M2");
41 MODULE_AUTHOR("Carsten Paeth");
42 MODULE_LICENSE("GPL");
44 /*====================================================================*/
47 The event() function is this driver's Card Services event handler.
48 It will be called by Card Services when an appropriate card status
49 event is received. The config() and release() entry points are
50 used to configure or release a socket, in response to card insertion
51 and ejection events. They are invoked from the skeleton event
55 static void avmcs_config(dev_link_t *link);
56 static void avmcs_release(dev_link_t *link);
57 static int avmcs_event(event_t event, int priority,
58 event_callback_args_t *args);
61 The attach() and detach() entry points are used to create and destroy
62 "instances" of the driver, where each instance represents everything
63 needed to manage one actual PCMCIA card.
66 static dev_link_t *avmcs_attach(void);
67 static void avmcs_detach(dev_link_t *);
70 The dev_info variable is the "key" that is used to match up this
71 device driver with appropriate cards, through the card configuration
75 static dev_info_t dev_info = "avm_cs";
78 A linked list of "instances" of the skeleton device. Each actual
79 PCMCIA card corresponds to one device instance, and is described
80 by one dev_link_t structure (defined in ds.h).
82 You may not want to use a linked list for this -- for example, the
83 memory card driver uses an array of dev_link_t pointers, where minor
84 device numbers are used to derive the corresponding array index.
87 static dev_link_t *dev_list = NULL;
90 A dev_link_t structure has fields for most things that are needed
91 to keep track of a socket, but there will usually be some device
92 specific information that also needs to be kept track of. The
93 'priv' pointer in a dev_link_t structure can be used to point to
94 a device-specific private data structure, like this.
96 A driver needs to provide a dev_node_t structure for each device
97 on a card. In some cases, there is only one device per card (for
98 example, ethernet cards, modems). In other cases, there may be
99 many actual or logical devices (SCSI adapters, memory cards with
100 multiple partitions). The dev_node_t structures need to be kept
101 in a linked list starting at the 'dev' field of a dev_link_t
102 structure. We allocate them in the card's private data structure,
103 because they generally can't be allocated dynamically.
106 typedef struct local_info_t {
110 /*======================================================================
112 avmcs_attach() creates an "instance" of the driver, allocating
113 local data structures for one device. The device is registered
116 The dev_link structure is initialized, but we don't actually
117 configure the card at this point -- we wait until we receive a
118 card insertion event.
120 ======================================================================*/
122 static dev_link_t *avmcs_attach(void)
124 client_reg_t client_reg;
129 /* Initialize the dev_link_t structure */
130 link = kmalloc(sizeof(struct dev_link_t), GFP_KERNEL);
133 memset(link, 0, sizeof(struct dev_link_t));
135 /* The io structure describes IO port mapping */
136 link->io.NumPorts1 = 16;
137 link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
138 link->io.NumPorts2 = 0;
140 /* Interrupt setup */
141 link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
142 link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED;
144 link->irq.IRQInfo1 = IRQ_LEVEL_ID;
146 /* General socket configuration */
147 link->conf.Attributes = CONF_ENABLE_IRQ;
149 link->conf.IntType = INT_MEMORY_AND_IO;
150 link->conf.ConfigIndex = 1;
151 link->conf.Present = PRESENT_OPTION;
153 /* Allocate space for private device-specific data */
154 local = kmalloc(sizeof(local_info_t), GFP_KERNEL);
157 memset(local, 0, sizeof(local_info_t));
160 /* Register with Card Services */
161 link->next = dev_list;
163 client_reg.dev_info = &dev_info;
164 client_reg.EventMask =
165 CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
166 CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
167 CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
168 client_reg.event_handler = &avmcs_event;
169 client_reg.Version = 0x0210;
170 client_reg.event_callback_args.client_data = link;
171 ret = pcmcia_register_client(&link->handle, &client_reg);
173 cs_error(link->handle, RegisterClient, ret);
185 /*======================================================================
187 This deletes a driver "instance". The device is de-registered
188 with Card Services. If it has been released, all local data
189 structures are freed. Otherwise, the structures will be freed
190 when the device is released.
192 ======================================================================*/
194 static void avmcs_detach(dev_link_t *link)
198 /* Locate device structure */
199 for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
200 if (*linkp == link) break;
205 If the device is currently configured and active, we won't
206 actually delete it yet. Instead, it is marked so that when
207 the release() function is called, that will trigger a proper
210 if (link->state & DEV_CONFIG) {
211 link->state |= DEV_STALE_LINK;
215 /* Break the link with Card Services */
217 pcmcia_deregister_client(link->handle);
219 /* Unlink device structure, free pieces */
228 /*======================================================================
230 avmcs_config() is scheduled to run after a CARD_INSERTION event
231 is received, to configure the PCMCIA socket, and to make the
232 ethernet device available to the system.
234 ======================================================================*/
236 static int get_tuple(client_handle_t handle, tuple_t *tuple,
239 int i = pcmcia_get_tuple_data(handle, tuple);
240 if (i != CS_SUCCESS) return i;
241 return pcmcia_parse_tuple(handle, tuple, parse);
244 static int first_tuple(client_handle_t handle, tuple_t *tuple,
247 int i = pcmcia_get_first_tuple(handle, tuple);
248 if (i != CS_SUCCESS) return i;
249 return get_tuple(handle, tuple, parse);
252 static int next_tuple(client_handle_t handle, tuple_t *tuple,
255 int i = pcmcia_get_next_tuple(handle, tuple);
256 if (i != CS_SUCCESS) return i;
257 return get_tuple(handle, tuple, parse);
260 static void avmcs_config(dev_link_t *link)
262 client_handle_t handle;
265 cistpl_cftable_entry_t *cf = &parse.cftable_entry;
271 int (*addcard)(unsigned int port, unsigned irq);
273 handle = link->handle;
277 This reads the card's CONFIG tuple to find its configuration
281 tuple.DesiredTuple = CISTPL_CONFIG;
282 i = pcmcia_get_first_tuple(handle, &tuple);
283 if (i != CS_SUCCESS) break;
284 tuple.TupleData = buf;
285 tuple.TupleDataMax = 64;
286 tuple.TupleOffset = 0;
287 i = pcmcia_get_tuple_data(handle, &tuple);
288 if (i != CS_SUCCESS) break;
289 i = pcmcia_parse_tuple(handle, &tuple, &parse);
290 if (i != CS_SUCCESS) break;
291 link->conf.ConfigBase = parse.config.base;
293 if (i != CS_SUCCESS) {
294 cs_error(link->handle, ParseTuple, i);
295 link->state &= ~DEV_CONFIG_PENDING;
300 link->state |= DEV_CONFIG;
304 tuple.Attributes = 0;
305 tuple.TupleData = buf;
306 tuple.TupleDataMax = 254;
307 tuple.TupleOffset = 0;
308 tuple.DesiredTuple = CISTPL_VERS_1;
311 if( !first_tuple(handle, &tuple, &parse) && parse.version_1.ns > 1 ) {
312 strlcpy(devname,parse.version_1.str + parse.version_1.ofs[1],
318 tuple.TupleData = (cisdata_t *)buf;
319 tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
320 tuple.Attributes = 0;
321 tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
322 i = first_tuple(handle, &tuple, &parse);
323 while (i == CS_SUCCESS) {
324 if (cf->io.nwin > 0) {
325 link->conf.ConfigIndex = cf->index;
326 link->io.BasePort1 = cf->io.win[0].base;
327 link->io.NumPorts1 = cf->io.win[0].len;
328 link->io.NumPorts2 = 0;
329 printk(KERN_INFO "avm_cs: testing i/o %#x-%#x\n",
331 link->io.BasePort1+link->io.NumPorts1-1);
332 i = pcmcia_request_io(link->handle, &link->io);
333 if (i == CS_SUCCESS) goto found_port;
335 i = next_tuple(handle, &tuple, &parse);
339 if (i != CS_SUCCESS) {
340 cs_error(link->handle, RequestIO, i);
345 * allocate an interrupt line
347 i = pcmcia_request_irq(link->handle, &link->irq);
348 if (i != CS_SUCCESS) {
349 cs_error(link->handle, RequestIRQ, i);
350 pcmcia_release_io(link->handle, &link->io);
355 * configure the PCMCIA socket
357 i = pcmcia_request_configuration(link->handle, &link->conf);
358 if (i != CS_SUCCESS) {
359 cs_error(link->handle, RequestConfiguration, i);
360 pcmcia_release_io(link->handle, &link->io);
361 pcmcia_release_irq(link->handle, &link->irq);
367 /* At this point, the dev_node_t structure(s) should be
368 initialized and arranged in a linked list at link->dev. */
371 char *s = strrchr(devname, ' ');
375 strcpy(dev->node.dev_name, s);
376 if (strcmp("M1", s) == 0) {
377 cardtype = AVM_CARDTYPE_M1;
378 } else if (strcmp("M2", s) == 0) {
379 cardtype = AVM_CARDTYPE_M2;
381 cardtype = AVM_CARDTYPE_B1;
384 strcpy(dev->node.dev_name, "b1");
385 cardtype = AVM_CARDTYPE_B1;
388 dev->node.major = 64;
390 link->dev = &dev->node;
392 link->state &= ~DEV_CONFIG_PENDING;
393 /* If any step failed, release any partially configured state */
401 case AVM_CARDTYPE_M1: addcard = b1pcmcia_addcard_m1; break;
402 case AVM_CARDTYPE_M2: addcard = b1pcmcia_addcard_m2; break;
404 case AVM_CARDTYPE_B1: addcard = b1pcmcia_addcard_b1; break;
406 if ((i = (*addcard)(link->io.BasePort1, link->irq.AssignedIRQ)) < 0) {
407 printk(KERN_ERR "avm_cs: failed to add AVM-%s-Controller at i/o %#x, irq %d\n",
408 dev->node.dev_name, link->io.BasePort1, link->irq.AssignedIRQ);
416 /*======================================================================
418 After a card is removed, avmcs_release() will unregister the net
419 device, and release the PCMCIA configuration. If the device is
420 still open, this will be postponed until it is closed.
422 ======================================================================*/
424 static void avmcs_release(dev_link_t *link)
426 b1pcmcia_delcard(link->io.BasePort1, link->irq.AssignedIRQ);
428 /* Unlink the device chain */
431 /* Don't bother checking to see if these succeed or not */
432 pcmcia_release_configuration(link->handle);
433 pcmcia_release_io(link->handle, &link->io);
434 pcmcia_release_irq(link->handle, &link->irq);
435 link->state &= ~DEV_CONFIG;
437 if (link->state & DEV_STALE_LINK)
440 } /* avmcs_release */
442 /*======================================================================
444 The card status event handler. Mostly, this schedules other
445 stuff to run after an event is received. A CARD_REMOVAL event
446 also sets some flags to discourage the net drivers from trying
447 to talk to the card any more.
449 When a CARD_REMOVAL event is received, we immediately set a flag
450 to block future accesses to this device. All the functions that
451 actually access the device should check this flag to make sure
452 the card is still present.
454 ======================================================================*/
456 static int avmcs_event(event_t event, int priority,
457 event_callback_args_t *args)
459 dev_link_t *link = args->client_data;
462 case CS_EVENT_CARD_REMOVAL:
463 link->state &= ~DEV_PRESENT;
464 if (link->state & DEV_CONFIG)
467 case CS_EVENT_CARD_INSERTION:
468 link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
471 case CS_EVENT_PM_SUSPEND:
472 link->state |= DEV_SUSPEND;
473 /* Fall through... */
474 case CS_EVENT_RESET_PHYSICAL:
475 if (link->state & DEV_CONFIG)
476 pcmcia_release_configuration(link->handle);
478 case CS_EVENT_PM_RESUME:
479 link->state &= ~DEV_SUSPEND;
480 /* Fall through... */
481 case CS_EVENT_CARD_RESET:
482 if (link->state & DEV_CONFIG)
483 pcmcia_request_configuration(link->handle, &link->conf);
489 static struct pcmcia_device_id avmcs_ids[] = {
490 PCMCIA_DEVICE_PROD_ID12("AVM", "ISDN-Controller B1", 0x95d42008, 0x845dc335),
491 PCMCIA_DEVICE_PROD_ID12("AVM", "Mobile ISDN-Controller M1", 0x95d42008, 0x81e10430),
492 PCMCIA_DEVICE_PROD_ID12("AVM", "Mobile ISDN-Controller M2", 0x95d42008, 0x18e8558a),
495 MODULE_DEVICE_TABLE(pcmcia, avmcs_ids);
497 static struct pcmcia_driver avmcs_driver = {
498 .owner = THIS_MODULE,
502 .attach = avmcs_attach,
503 .detach = avmcs_detach,
504 .id_table = avmcs_ids,
507 static int __init avmcs_init(void)
509 return pcmcia_register_driver(&avmcs_driver);
512 static void __exit avmcs_exit(void)
514 pcmcia_unregister_driver(&avmcs_driver);
515 BUG_ON(dev_list != NULL);
518 module_init(avmcs_init);
519 module_exit(avmcs_exit);