2 * PCMCIA client driver for AVM A1 / Fritz!PCMCIA
5 * Copyright 1998-2001 by Carsten Paeth <calle@calle.in-berlin.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>
15 #include <linux/kernel.h>
16 #include <linux/init.h>
17 #include <linux/sched.h>
18 #include <linux/ptrace.h>
19 #include <linux/slab.h>
20 #include <linux/string.h>
22 #include <asm/system.h>
24 #include <pcmcia/cs_types.h>
25 #include <pcmcia/cs.h>
26 #include <pcmcia/cistpl.h>
27 #include <pcmcia/ds.h>
28 #include "hisax_cfg.h"
30 MODULE_DESCRIPTION("ISDN4Linux: PCMCIA client driver for AVM A1/Fritz!PCMCIA cards");
31 MODULE_AUTHOR("Carsten Paeth");
32 MODULE_LICENSE("GPL");
35 All the PCMCIA modules use PCMCIA_DEBUG to control debugging. If
36 you do not define PCMCIA_DEBUG at all, all the debug code will be
37 left out. If you compile with PCMCIA_DEBUG=0, the debug code will
38 be present but disabled -- but it can then be enabled for specific
39 modules at load time with a 'pc_debug=#' option to insmod.
42 static int pc_debug = PCMCIA_DEBUG;
43 module_param(pc_debug, int, 0);
44 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args);
45 static char *version =
46 "avma1_cs.c 1.00 1998/01/23 10:00:00 (Carsten Paeth)";
48 #define DEBUG(n, args...)
51 /*====================================================================*/
53 /* Parameters that can be set with 'insmod' */
55 static int isdnprot = 2;
57 module_param(isdnprot, int, 0);
59 /*====================================================================*/
62 The event() function is this driver's Card Services event handler.
63 It will be called by Card Services when an appropriate card status
64 event is received. The config() and release() entry points are
65 used to configure or release a socket, in response to card insertion
66 and ejection events. They are invoked from the skeleton event
70 static void avma1cs_config(dev_link_t *link);
71 static void avma1cs_release(dev_link_t *link);
72 static int avma1cs_event(event_t event, int priority,
73 event_callback_args_t *args);
76 The attach() and detach() entry points are used to create and destroy
77 "instances" of the driver, where each instance represents everything
78 needed to manage one actual PCMCIA card.
81 static dev_link_t *avma1cs_attach(void);
82 static void avma1cs_detach(struct pcmcia_device *p_dev);
85 The dev_info variable is the "key" that is used to match up this
86 device driver with appropriate cards, through the card configuration
90 static dev_info_t dev_info = "avma1_cs";
93 A linked list of "instances" of the skeleton device. Each actual
94 PCMCIA card corresponds to one device instance, and is described
95 by one dev_link_t structure (defined in ds.h).
97 You may not want to use a linked list for this -- for example, the
98 memory card driver uses an array of dev_link_t pointers, where minor
99 device numbers are used to derive the corresponding array index.
102 static dev_link_t *dev_list = NULL;
105 A dev_link_t structure has fields for most things that are needed
106 to keep track of a socket, but there will usually be some device
107 specific information that also needs to be kept track of. The
108 'priv' pointer in a dev_link_t structure can be used to point to
109 a device-specific private data structure, like this.
111 A driver needs to provide a dev_node_t structure for each device
112 on a card. In some cases, there is only one device per card (for
113 example, ethernet cards, modems). In other cases, there may be
114 many actual or logical devices (SCSI adapters, memory cards with
115 multiple partitions). The dev_node_t structures need to be kept
116 in a linked list starting at the 'dev' field of a dev_link_t
117 structure. We allocate them in the card's private data structure,
118 because they generally can't be allocated dynamically.
121 typedef struct local_info_t {
125 /*======================================================================
127 avma1cs_attach() creates an "instance" of the driver, allocating
128 local data structures for one device. The device is registered
131 The dev_link structure is initialized, but we don't actually
132 configure the card at this point -- we wait until we receive a
133 card insertion event.
135 ======================================================================*/
137 static dev_link_t *avma1cs_attach(void)
139 client_reg_t client_reg;
144 DEBUG(0, "avma1cs_attach()\n");
146 /* Initialize the dev_link_t structure */
147 link = kmalloc(sizeof(struct dev_link_t), GFP_KERNEL);
150 memset(link, 0, sizeof(struct dev_link_t));
152 /* Allocate space for private device-specific data */
153 local = kmalloc(sizeof(local_info_t), GFP_KERNEL);
158 memset(local, 0, sizeof(local_info_t));
161 /* The io structure describes IO port mapping */
162 link->io.NumPorts1 = 16;
163 link->io.Attributes1 = IO_DATA_PATH_WIDTH_8;
164 link->io.NumPorts2 = 16;
165 link->io.Attributes2 = IO_DATA_PATH_WIDTH_16;
166 link->io.IOAddrLines = 5;
168 /* Interrupt setup */
169 link->irq.Attributes = IRQ_TYPE_EXCLUSIVE;
170 link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED;
172 link->irq.IRQInfo1 = IRQ_LEVEL_ID;
174 /* General socket configuration */
175 link->conf.Attributes = CONF_ENABLE_IRQ;
177 link->conf.IntType = INT_MEMORY_AND_IO;
178 link->conf.ConfigIndex = 1;
179 link->conf.Present = PRESENT_OPTION;
181 /* Register with Card Services */
182 link->next = dev_list;
184 client_reg.dev_info = &dev_info;
185 client_reg.Version = 0x0210;
186 client_reg.event_callback_args.client_data = link;
187 ret = pcmcia_register_client(&link->handle, &client_reg);
189 cs_error(link->handle, RegisterClient, ret);
190 avma1cs_detach(link->handle);
195 } /* avma1cs_attach */
197 /*======================================================================
199 This deletes a driver "instance". The device is de-registered
200 with Card Services. If it has been released, all local data
201 structures are freed. Otherwise, the structures will be freed
202 when the device is released.
204 ======================================================================*/
206 static void avma1cs_detach(struct pcmcia_device *p_dev)
208 dev_link_t *link = dev_to_instance(p_dev);
211 DEBUG(0, "avma1cs_detach(0x%p)\n", link);
213 /* Locate device structure */
214 for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
215 if (*linkp == link) break;
219 if (link->state & DEV_CONFIG)
220 avma1cs_release(link);
222 /* Unlink device structure, free pieces */
226 } /* avma1cs_detach */
228 /*======================================================================
230 avma1cs_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 avma1cs_config(dev_link_t *link)
262 client_handle_t handle;
265 cistpl_cftable_entry_t *cf = &parse.cftable_entry;
273 handle = link->handle;
276 DEBUG(0, "avma1cs_config(0x%p)\n", link);
279 This reads the card's CONFIG tuple to find its configuration
283 tuple.DesiredTuple = CISTPL_CONFIG;
284 i = pcmcia_get_first_tuple(handle, &tuple);
285 if (i != CS_SUCCESS) break;
286 tuple.TupleData = buf;
287 tuple.TupleDataMax = 64;
288 tuple.TupleOffset = 0;
289 i = pcmcia_get_tuple_data(handle, &tuple);
290 if (i != CS_SUCCESS) break;
291 i = pcmcia_parse_tuple(handle, &tuple, &parse);
292 if (i != CS_SUCCESS) break;
293 link->conf.ConfigBase = parse.config.base;
295 if (i != CS_SUCCESS) {
296 cs_error(link->handle, ParseTuple, i);
297 link->state &= ~DEV_CONFIG_PENDING;
302 link->state |= DEV_CONFIG;
306 tuple.Attributes = 0;
307 tuple.TupleData = buf;
308 tuple.TupleDataMax = 254;
309 tuple.TupleOffset = 0;
310 tuple.DesiredTuple = CISTPL_VERS_1;
313 if( !first_tuple(handle, &tuple, &parse) && parse.version_1.ns > 1 ) {
314 strlcpy(devname,parse.version_1.str + parse.version_1.ofs[1],
320 tuple.TupleData = (cisdata_t *)buf;
321 tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
322 tuple.Attributes = 0;
323 tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
324 i = first_tuple(handle, &tuple, &parse);
325 while (i == CS_SUCCESS) {
326 if (cf->io.nwin > 0) {
327 link->conf.ConfigIndex = cf->index;
328 link->io.BasePort1 = cf->io.win[0].base;
329 link->io.NumPorts1 = cf->io.win[0].len;
330 link->io.NumPorts2 = 0;
331 printk(KERN_INFO "avma1_cs: testing i/o %#x-%#x\n",
333 link->io.BasePort1+link->io.NumPorts1 - 1);
334 i = pcmcia_request_io(link->handle, &link->io);
335 if (i == CS_SUCCESS) goto found_port;
337 i = next_tuple(handle, &tuple, &parse);
341 if (i != CS_SUCCESS) {
342 cs_error(link->handle, RequestIO, i);
347 * allocate an interrupt line
349 i = pcmcia_request_irq(link->handle, &link->irq);
350 if (i != CS_SUCCESS) {
351 cs_error(link->handle, RequestIRQ, i);
352 pcmcia_release_io(link->handle, &link->io);
357 * configure the PCMCIA socket
359 i = pcmcia_request_configuration(link->handle, &link->conf);
360 if (i != CS_SUCCESS) {
361 cs_error(link->handle, RequestConfiguration, i);
362 pcmcia_release_io(link->handle, &link->io);
363 pcmcia_release_irq(link->handle, &link->irq);
369 /* At this point, the dev_node_t structure(s) should be
370 initialized and arranged in a linked list at link->dev. */
372 strcpy(dev->node.dev_name, "A1");
373 dev->node.major = 45;
375 link->dev = &dev->node;
377 link->state &= ~DEV_CONFIG_PENDING;
378 /* If any step failed, release any partially configured state */
380 avma1cs_release(link);
384 printk(KERN_NOTICE "avma1_cs: checking at i/o %#x, irq %d\n",
385 link->io.BasePort1, link->irq.AssignedIRQ);
387 icard.para[0] = link->irq.AssignedIRQ;
388 icard.para[1] = link->io.BasePort1;
389 icard.protocol = isdnprot;
390 icard.typ = ISDN_CTYPE_A1_PCMCIA;
392 i = hisax_init_pcmcia(link, &busy, &icard);
394 printk(KERN_ERR "avma1_cs: failed to initialize AVM A1 PCMCIA %d at i/o %#x\n", i, link->io.BasePort1);
395 avma1cs_release(link);
400 } /* avma1cs_config */
402 /*======================================================================
404 After a card is removed, avma1cs_release() will unregister the net
405 device, and release the PCMCIA configuration. If the device is
406 still open, this will be postponed until it is closed.
408 ======================================================================*/
410 static void avma1cs_release(dev_link_t *link)
412 local_info_t *local = link->priv;
414 DEBUG(0, "avma1cs_release(0x%p)\n", link);
416 /* no unregister function with hisax */
417 HiSax_closecard(local->node.minor);
419 /* Unlink the device chain */
422 /* Don't bother checking to see if these succeed or not */
423 pcmcia_release_configuration(link->handle);
424 pcmcia_release_io(link->handle, &link->io);
425 pcmcia_release_irq(link->handle, &link->irq);
426 link->state &= ~DEV_CONFIG;
427 } /* avma1cs_release */
429 static int avma1cs_suspend(struct pcmcia_device *dev)
431 dev_link_t *link = dev_to_instance(dev);
433 link->state |= DEV_SUSPEND;
434 if (link->state & DEV_CONFIG)
435 pcmcia_release_configuration(link->handle);
440 static int avma1cs_resume(struct pcmcia_device *dev)
442 dev_link_t *link = dev_to_instance(dev);
444 link->state &= ~DEV_SUSPEND;
445 if (link->state & DEV_CONFIG)
446 pcmcia_request_configuration(link->handle, &link->conf);
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 avma1cs_event(event_t event, int priority,
466 event_callback_args_t *args)
468 dev_link_t *link = args->client_data;
470 DEBUG(1, "avma1cs_event(0x%06x)\n", event);
473 case CS_EVENT_CARD_INSERTION:
474 link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
475 avma1cs_config(link);
479 } /* avma1cs_event */
481 static struct pcmcia_device_id avma1cs_ids[] = {
482 PCMCIA_DEVICE_PROD_ID12("AVM", "ISDN A", 0x95d42008, 0xadc9d4bb),
483 PCMCIA_DEVICE_PROD_ID12("ISDN", "CARD", 0x8d9761c8, 0x01c5aa7b),
486 MODULE_DEVICE_TABLE(pcmcia, avma1cs_ids);
488 static struct pcmcia_driver avma1cs_driver = {
489 .owner = THIS_MODULE,
493 .attach = avma1cs_attach,
494 .event = avma1cs_event,
495 .remove = avma1cs_detach,
496 .id_table = avma1cs_ids,
497 .suspend = avma1cs_suspend,
498 .resume = avma1cs_resume,
501 /*====================================================================*/
503 static int __init init_avma1_cs(void)
505 return(pcmcia_register_driver(&avma1cs_driver));
508 static void __exit exit_avma1_cs(void)
510 pcmcia_unregister_driver(&avma1cs_driver);
511 BUG_ON(dev_list != NULL);
514 module_init(init_avma1_cs);
515 module_exit(exit_avma1_cs);