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/cs_types.h>
26 #include <pcmcia/cs.h>
27 #include <pcmcia/cistpl.h>
28 #include <pcmcia/ciscode.h>
29 #include <pcmcia/ds.h>
30 #include <pcmcia/cisreg.h>
32 #include <linux/skbuff.h>
33 #include <linux/capi.h>
34 #include <linux/b1lli.h>
35 #include <linux/b1pcmcia.h>
37 /*====================================================================*/
39 MODULE_DESCRIPTION("CAPI4Linux: PCMCIA client driver for AVM B1/M1/M2");
40 MODULE_AUTHOR("Carsten Paeth");
41 MODULE_LICENSE("GPL");
43 /*====================================================================*/
46 The event() function is this driver's Card Services event handler.
47 It will be called by Card Services when an appropriate card status
48 event is received. The config() and release() entry points are
49 used to configure or release a socket, in response to card insertion
50 and ejection events. They are invoked from the skeleton event
54 static void avmcs_config(dev_link_t *link);
55 static void avmcs_release(dev_link_t *link);
58 The attach() and detach() entry points are used to create and destroy
59 "instances" of the driver, where each instance represents everything
60 needed to manage one actual PCMCIA card.
63 static void avmcs_detach(struct pcmcia_device *p_dev);
66 A linked list of "instances" of the skeleton device. Each actual
67 PCMCIA card corresponds to one device instance, and is described
68 by one dev_link_t structure (defined in ds.h).
70 You may not want to use a linked list for this -- for example, the
71 memory card driver uses an array of dev_link_t pointers, where minor
72 device numbers are used to derive the corresponding array index.
76 A driver needs to provide a dev_node_t structure for each device
77 on a card. In some cases, there is only one device per card (for
78 example, ethernet cards, modems). In other cases, there may be
79 many actual or logical devices (SCSI adapters, memory cards with
80 multiple partitions). The dev_node_t structures need to be kept
81 in a linked list starting at the 'dev' field of a dev_link_t
82 structure. We allocate them in the card's private data structure,
83 because they generally can't be allocated dynamically.
86 typedef struct local_info_t {
90 /*======================================================================
92 avmcs_attach() creates an "instance" of the driver, allocating
93 local data structures for one device. The device is registered
96 The dev_link structure is initialized, but we don't actually
97 configure the card at this point -- we wait until we receive a
100 ======================================================================*/
102 static int avmcs_attach(struct pcmcia_device *p_dev)
107 /* Initialize the dev_link_t structure */
108 link = kmalloc(sizeof(struct dev_link_t), GFP_KERNEL);
111 memset(link, 0, sizeof(struct dev_link_t));
113 /* The io structure describes IO port mapping */
114 link->io.NumPorts1 = 16;
115 link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
116 link->io.NumPorts2 = 0;
118 /* Interrupt setup */
119 link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
120 link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED;
122 link->irq.IRQInfo1 = IRQ_LEVEL_ID;
124 /* General socket configuration */
125 link->conf.Attributes = CONF_ENABLE_IRQ;
127 link->conf.IntType = INT_MEMORY_AND_IO;
128 link->conf.ConfigIndex = 1;
129 link->conf.Present = PRESENT_OPTION;
131 /* Allocate space for private device-specific data */
132 local = kmalloc(sizeof(local_info_t), GFP_KERNEL);
135 memset(local, 0, sizeof(local_info_t));
138 link->handle = p_dev;
139 p_dev->instance = link;
141 link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
152 /*======================================================================
154 This deletes a driver "instance". The device is de-registered
155 with Card Services. If it has been released, all local data
156 structures are freed. Otherwise, the structures will be freed
157 when the device is released.
159 ======================================================================*/
161 static void avmcs_detach(struct pcmcia_device *p_dev)
163 dev_link_t *link = dev_to_instance(p_dev);
165 if (link->state & DEV_CONFIG)
172 /*======================================================================
174 avmcs_config() is scheduled to run after a CARD_INSERTION event
175 is received, to configure the PCMCIA socket, and to make the
176 ethernet device available to the system.
178 ======================================================================*/
180 static int get_tuple(client_handle_t handle, tuple_t *tuple,
183 int i = pcmcia_get_tuple_data(handle, tuple);
184 if (i != CS_SUCCESS) return i;
185 return pcmcia_parse_tuple(handle, tuple, parse);
188 static int first_tuple(client_handle_t handle, tuple_t *tuple,
191 int i = pcmcia_get_first_tuple(handle, tuple);
192 if (i != CS_SUCCESS) return i;
193 return get_tuple(handle, tuple, parse);
196 static int next_tuple(client_handle_t handle, tuple_t *tuple,
199 int i = pcmcia_get_next_tuple(handle, tuple);
200 if (i != CS_SUCCESS) return i;
201 return get_tuple(handle, tuple, parse);
204 static void avmcs_config(dev_link_t *link)
206 client_handle_t handle;
209 cistpl_cftable_entry_t *cf = &parse.cftable_entry;
215 int (*addcard)(unsigned int port, unsigned irq);
217 handle = link->handle;
221 This reads the card's CONFIG tuple to find its configuration
225 tuple.DesiredTuple = CISTPL_CONFIG;
226 i = pcmcia_get_first_tuple(handle, &tuple);
227 if (i != CS_SUCCESS) break;
228 tuple.TupleData = buf;
229 tuple.TupleDataMax = 64;
230 tuple.TupleOffset = 0;
231 i = pcmcia_get_tuple_data(handle, &tuple);
232 if (i != CS_SUCCESS) break;
233 i = pcmcia_parse_tuple(handle, &tuple, &parse);
234 if (i != CS_SUCCESS) break;
235 link->conf.ConfigBase = parse.config.base;
237 if (i != CS_SUCCESS) {
238 cs_error(link->handle, ParseTuple, i);
239 link->state &= ~DEV_CONFIG_PENDING;
244 link->state |= DEV_CONFIG;
248 tuple.Attributes = 0;
249 tuple.TupleData = buf;
250 tuple.TupleDataMax = 254;
251 tuple.TupleOffset = 0;
252 tuple.DesiredTuple = CISTPL_VERS_1;
255 if( !first_tuple(handle, &tuple, &parse) && parse.version_1.ns > 1 ) {
256 strlcpy(devname,parse.version_1.str + parse.version_1.ofs[1],
262 tuple.TupleData = (cisdata_t *)buf;
263 tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
264 tuple.Attributes = 0;
265 tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
266 i = first_tuple(handle, &tuple, &parse);
267 while (i == CS_SUCCESS) {
268 if (cf->io.nwin > 0) {
269 link->conf.ConfigIndex = cf->index;
270 link->io.BasePort1 = cf->io.win[0].base;
271 link->io.NumPorts1 = cf->io.win[0].len;
272 link->io.NumPorts2 = 0;
273 printk(KERN_INFO "avm_cs: testing i/o %#x-%#x\n",
275 link->io.BasePort1+link->io.NumPorts1-1);
276 i = pcmcia_request_io(link->handle, &link->io);
277 if (i == CS_SUCCESS) goto found_port;
279 i = next_tuple(handle, &tuple, &parse);
283 if (i != CS_SUCCESS) {
284 cs_error(link->handle, RequestIO, i);
289 * allocate an interrupt line
291 i = pcmcia_request_irq(link->handle, &link->irq);
292 if (i != CS_SUCCESS) {
293 cs_error(link->handle, RequestIRQ, i);
294 pcmcia_release_io(link->handle, &link->io);
299 * configure the PCMCIA socket
301 i = pcmcia_request_configuration(link->handle, &link->conf);
302 if (i != CS_SUCCESS) {
303 cs_error(link->handle, RequestConfiguration, i);
304 pcmcia_release_io(link->handle, &link->io);
305 pcmcia_release_irq(link->handle, &link->irq);
311 /* At this point, the dev_node_t structure(s) should be
312 initialized and arranged in a linked list at link->dev. */
315 char *s = strrchr(devname, ' ');
319 strcpy(dev->node.dev_name, s);
320 if (strcmp("M1", s) == 0) {
321 cardtype = AVM_CARDTYPE_M1;
322 } else if (strcmp("M2", s) == 0) {
323 cardtype = AVM_CARDTYPE_M2;
325 cardtype = AVM_CARDTYPE_B1;
328 strcpy(dev->node.dev_name, "b1");
329 cardtype = AVM_CARDTYPE_B1;
332 dev->node.major = 64;
334 link->dev = &dev->node;
336 link->state &= ~DEV_CONFIG_PENDING;
337 /* If any step failed, release any partially configured state */
345 case AVM_CARDTYPE_M1: addcard = b1pcmcia_addcard_m1; break;
346 case AVM_CARDTYPE_M2: addcard = b1pcmcia_addcard_m2; break;
348 case AVM_CARDTYPE_B1: addcard = b1pcmcia_addcard_b1; break;
350 if ((i = (*addcard)(link->io.BasePort1, link->irq.AssignedIRQ)) < 0) {
351 printk(KERN_ERR "avm_cs: failed to add AVM-%s-Controller at i/o %#x, irq %d\n",
352 dev->node.dev_name, link->io.BasePort1, link->irq.AssignedIRQ);
360 /*======================================================================
362 After a card is removed, avmcs_release() will unregister the net
363 device, and release the PCMCIA configuration. If the device is
364 still open, this will be postponed until it is closed.
366 ======================================================================*/
368 static void avmcs_release(dev_link_t *link)
370 b1pcmcia_delcard(link->io.BasePort1, link->irq.AssignedIRQ);
372 /* Unlink the device chain */
375 /* Don't bother checking to see if these succeed or not */
376 pcmcia_release_configuration(link->handle);
377 pcmcia_release_io(link->handle, &link->io);
378 pcmcia_release_irq(link->handle, &link->irq);
379 link->state &= ~DEV_CONFIG;
380 } /* avmcs_release */
382 static int avmcs_suspend(struct pcmcia_device *dev)
384 dev_link_t *link = dev_to_instance(dev);
386 link->state |= DEV_SUSPEND;
387 if (link->state & DEV_CONFIG)
388 pcmcia_release_configuration(link->handle);
393 static int avmcs_resume(struct pcmcia_device *dev)
395 dev_link_t *link = dev_to_instance(dev);
397 link->state &= ~DEV_SUSPEND;
398 if (link->state & DEV_CONFIG)
399 pcmcia_request_configuration(link->handle, &link->conf);
404 /*======================================================================
406 The card status event handler. Mostly, this schedules other
407 stuff to run after an event is received. A CARD_REMOVAL event
408 also sets some flags to discourage the net drivers from trying
409 to talk to the card any more.
411 When a CARD_REMOVAL event is received, we immediately set a flag
412 to block future accesses to this device. All the functions that
413 actually access the device should check this flag to make sure
414 the card is still present.
416 ======================================================================*/
419 static struct pcmcia_device_id avmcs_ids[] = {
420 PCMCIA_DEVICE_PROD_ID12("AVM", "ISDN-Controller B1", 0x95d42008, 0x845dc335),
421 PCMCIA_DEVICE_PROD_ID12("AVM", "Mobile ISDN-Controller M1", 0x95d42008, 0x81e10430),
422 PCMCIA_DEVICE_PROD_ID12("AVM", "Mobile ISDN-Controller M2", 0x95d42008, 0x18e8558a),
425 MODULE_DEVICE_TABLE(pcmcia, avmcs_ids);
427 static struct pcmcia_driver avmcs_driver = {
428 .owner = THIS_MODULE,
432 .probe = avmcs_attach,
433 .remove = avmcs_detach,
434 .id_table = avmcs_ids,
435 .suspend= avmcs_suspend,
436 .resume = avmcs_resume,
439 static int __init avmcs_init(void)
441 return pcmcia_register_driver(&avmcs_driver);
444 static void __exit avmcs_exit(void)
446 pcmcia_unregister_driver(&avmcs_driver);
449 module_init(avmcs_init);
450 module_exit(avmcs_exit);