1 /* $Id: teles_cs.c,v 1.1.2.2 2004/01/25 15:07:06 keil Exp $ */
2 /*======================================================================
4 A teles S0 PCMCIA client driver
6 Based on skeleton by David Hinds, dhinds@allegro.stanford.edu
7 Written by Christof Petig, christof.petig@wtal.de
9 Also inspired by ELSA PCMCIA driver
10 by Klaus Lichtenwalder <Lichtenwalder@ACM.org>
12 Extentions to new hisax_pcmcia by Karsten Keil
14 minor changes to be compatible with kernel 2.4.x
15 by Jan.Schubert@GMX.li
17 ======================================================================*/
19 #include <linux/kernel.h>
20 #include <linux/module.h>
21 #include <linux/init.h>
22 #include <linux/sched.h>
23 #include <linux/ptrace.h>
24 #include <linux/slab.h>
25 #include <linux/string.h>
26 #include <linux/timer.h>
27 #include <linux/ioport.h>
29 #include <asm/system.h>
31 #include <pcmcia/cs_types.h>
32 #include <pcmcia/cs.h>
33 #include <pcmcia/cistpl.h>
34 #include <pcmcia/cisreg.h>
35 #include <pcmcia/ds.h>
36 #include "hisax_cfg.h"
38 MODULE_DESCRIPTION("ISDN4Linux: PCMCIA client driver for Teles PCMCIA cards");
39 MODULE_AUTHOR("Christof Petig, christof.petig@wtal.de, Karsten Keil, kkeil@suse.de");
40 MODULE_LICENSE("GPL");
43 All the PCMCIA modules use PCMCIA_DEBUG to control debugging. If
44 you do not define PCMCIA_DEBUG at all, all the debug code will be
45 left out. If you compile with PCMCIA_DEBUG=0, the debug code will
46 be present but disabled -- but it can then be enabled for specific
47 modules at load time with a 'pc_debug=#' option to insmod.
51 static int pc_debug = PCMCIA_DEBUG;
52 module_param(pc_debug, int, 0);
53 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args);
54 static char *version =
55 "teles_cs.c 2.10 2002/07/30 22:23:34 kkeil";
57 #define DEBUG(n, args...)
60 /*====================================================================*/
62 /* Parameters that can be set with 'insmod' */
64 static int protocol = 2; /* EURO-ISDN Default */
65 module_param(protocol, int, 0);
67 /*====================================================================*/
70 The event() function is this driver's Card Services event handler.
71 It will be called by Card Services when an appropriate card status
72 event is received. The config() and release() entry points are
73 used to configure or release a socket, in response to card insertion
74 and ejection events. They are invoked from the teles_cs event
78 static void teles_cs_config(dev_link_t *link);
79 static void teles_cs_release(dev_link_t *link);
80 static int teles_cs_event(event_t event, int priority,
81 event_callback_args_t *args);
84 The attach() and detach() entry points are used to create and destroy
85 "instances" of the driver, where each instance represents everything
86 needed to manage one actual PCMCIA card.
89 static dev_link_t *teles_attach(void);
90 static void teles_detach(dev_link_t *);
93 The dev_info variable is the "key" that is used to match up this
94 device driver with appropriate cards, through the card configuration
98 static dev_info_t dev_info = "teles_cs";
101 A linked list of "instances" of the teles_cs device. Each actual
102 PCMCIA card corresponds to one device instance, and is described
103 by one dev_link_t structure (defined in ds.h).
105 You may not want to use a linked list for this -- for example, the
106 memory card driver uses an array of dev_link_t pointers, where minor
107 device numbers are used to derive the corresponding array index.
110 static dev_link_t *dev_list = NULL;
113 A dev_link_t structure has fields for most things that are needed
114 to keep track of a socket, but there will usually be some device
115 specific information that also needs to be kept track of. The
116 'priv' pointer in a dev_link_t structure can be used to point to
117 a device-specific private data structure, like this.
119 To simplify the data structure handling, we actually include the
120 dev_link_t structure in the device's private data structure.
122 A driver needs to provide a dev_node_t structure for each device
123 on a card. In some cases, there is only one device per card (for
124 example, ethernet cards, modems). In other cases, there may be
125 many actual or logical devices (SCSI adapters, memory cards with
126 multiple partitions). The dev_node_t structures need to be kept
127 in a linked list starting at the 'dev' field of a dev_link_t
128 structure. We allocate them in the card's private data structure,
129 because they generally shouldn't be allocated dynamically.
130 In this case, we also provide a flag to indicate if a device is
131 "stopped" due to a power management event, or card ejection. The
132 device IO routines can use a flag like this to throttle IO to a
133 card that is not ready to accept it.
136 typedef struct local_info_t {
143 /*======================================================================
145 teles_attach() creates an "instance" of the driver, allocatingx
146 local data structures for one device. The device is registered
149 The dev_link structure is initialized, but we don't actually
150 configure the card at this point -- we wait until we receive a
151 card insertion event.
153 ======================================================================*/
155 static dev_link_t *teles_attach(void)
157 client_reg_t client_reg;
162 DEBUG(0, "teles_attach()\n");
164 /* Allocate space for private device-specific data */
165 local = kmalloc(sizeof(local_info_t), GFP_KERNEL);
166 if (!local) return NULL;
167 memset(local, 0, sizeof(local_info_t));
169 link = &local->link; link->priv = local;
171 /* Interrupt setup */
172 link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED;
173 link->irq.IRQInfo1 = IRQ_LEVEL_ID|IRQ_SHARE_ID;
174 link->irq.Handler = NULL;
177 General socket configuration defaults can go here. In this
178 client, we assume very little, and rely on the CIS for almost
179 everything. In most clients, many details (i.e., number, sizes,
180 and attributes of IO windows) are fixed by the nature of the
181 device, and can be hard-wired here.
183 link->io.NumPorts1 = 96;
184 link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
185 link->io.IOAddrLines = 5;
187 link->conf.Attributes = CONF_ENABLE_IRQ;
189 link->conf.IntType = INT_MEMORY_AND_IO;
191 /* Register with Card Services */
192 link->next = dev_list;
194 client_reg.dev_info = &dev_info;
195 client_reg.Version = 0x0210;
196 client_reg.event_callback_args.client_data = link;
197 ret = pcmcia_register_client(&link->handle, &client_reg);
198 if (ret != CS_SUCCESS) {
199 cs_error(link->handle, RegisterClient, ret);
207 /*======================================================================
209 This deletes a driver "instance". The device is de-registered
210 with Card Services. If it has been released, all local data
211 structures are freed. Otherwise, the structures will be freed
212 when the device is released.
214 ======================================================================*/
216 static void teles_detach(dev_link_t *link)
219 local_info_t *info = link->priv;
222 DEBUG(0, "teles_detach(0x%p)\n", link);
224 /* Locate device structure */
225 for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
226 if (*linkp == link) break;
230 if (link->state & DEV_CONFIG)
231 teles_cs_release(link);
233 /* Break the link with Card Services */
235 ret = pcmcia_deregister_client(link->handle);
236 if (ret != CS_SUCCESS)
237 cs_error(link->handle, DeregisterClient, ret);
240 /* Unlink device structure and free it */
246 /*======================================================================
248 teles_cs_config() is scheduled to run after a CARD_INSERTION event
249 is received, to configure the PCMCIA socket, and to make the
250 device available to the system.
252 ======================================================================*/
253 static int get_tuple(client_handle_t handle, tuple_t *tuple,
256 int i = pcmcia_get_tuple_data(handle, tuple);
257 if (i != CS_SUCCESS) return i;
258 return pcmcia_parse_tuple(handle, tuple, parse);
261 static int first_tuple(client_handle_t handle, tuple_t *tuple,
264 int i = pcmcia_get_first_tuple(handle, tuple);
265 if (i != CS_SUCCESS) return i;
266 return get_tuple(handle, tuple, parse);
269 static int next_tuple(client_handle_t handle, tuple_t *tuple,
272 int i = pcmcia_get_next_tuple(handle, tuple);
273 if (i != CS_SUCCESS) return i;
274 return get_tuple(handle, tuple, parse);
277 static void teles_cs_config(dev_link_t *link)
279 client_handle_t handle;
285 cistpl_cftable_entry_t *cf = &parse.cftable_entry;
288 DEBUG(0, "teles_config(0x%p)\n", link);
289 handle = link->handle;
293 This reads the card's CONFIG tuple to find its configuration
296 tuple.DesiredTuple = CISTPL_CONFIG;
297 tuple.TupleData = (cisdata_t *)buf;
298 tuple.TupleDataMax = 255;
299 tuple.TupleOffset = 0;
300 tuple.Attributes = 0;
301 i = first_tuple(handle, &tuple, &parse);
302 if (i != CS_SUCCESS) {
303 last_fn = ParseTuple;
306 link->conf.ConfigBase = parse.config.base;
307 link->conf.Present = parse.config.rmask[0];
310 link->state |= DEV_CONFIG;
312 tuple.TupleData = (cisdata_t *)buf;
313 tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
314 tuple.Attributes = 0;
315 tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
316 i = first_tuple(handle, &tuple, &parse);
317 while (i == CS_SUCCESS) {
318 if ( (cf->io.nwin > 0) && cf->io.win[0].base) {
319 printk(KERN_INFO "(teles_cs: looks like the 96 model)\n");
320 link->conf.ConfigIndex = cf->index;
321 link->io.BasePort1 = cf->io.win[0].base;
322 i = pcmcia_request_io(link->handle, &link->io);
323 if (i == CS_SUCCESS) break;
325 printk(KERN_INFO "(teles_cs: looks like the 97 model)\n");
326 link->conf.ConfigIndex = cf->index;
327 for (i = 0, j = 0x2f0; j > 0x100; j -= 0x10) {
328 link->io.BasePort1 = j;
329 i = pcmcia_request_io(link->handle, &link->io);
330 if (i == CS_SUCCESS) break;
334 i = next_tuple(handle, &tuple, &parse);
337 if (i != CS_SUCCESS) {
342 i = pcmcia_request_irq(link->handle, &link->irq);
343 if (i != CS_SUCCESS) {
344 link->irq.AssignedIRQ = 0;
345 last_fn = RequestIRQ;
349 i = pcmcia_request_configuration(link->handle, &link->conf);
350 if (i != CS_SUCCESS) {
351 last_fn = RequestConfiguration;
355 /* At this point, the dev_node_t structure(s) should be
356 initialized and arranged in a linked list at link->dev. *//* */
357 sprintf(dev->node.dev_name, "teles");
358 dev->node.major = dev->node.minor = 0x0;
360 link->dev = &dev->node;
362 /* Finally, report what we've done */
363 printk(KERN_INFO "%s: index 0x%02x: Vcc %d.%d",
364 dev->node.dev_name, link->conf.ConfigIndex,
365 link->conf.Vcc/10, link->conf.Vcc%10);
367 printk(", Vpp %d.%d", link->conf.Vpp1/10, link->conf.Vpp1%10);
368 if (link->conf.Attributes & CONF_ENABLE_IRQ)
369 printk(", irq %d", link->irq.AssignedIRQ);
370 if (link->io.NumPorts1)
371 printk(", io 0x%04x-0x%04x", link->io.BasePort1,
372 link->io.BasePort1+link->io.NumPorts1-1);
373 if (link->io.NumPorts2)
374 printk(" & 0x%04x-0x%04x", link->io.BasePort2,
375 link->io.BasePort2+link->io.NumPorts2-1);
378 link->state &= ~DEV_CONFIG_PENDING;
380 icard.para[0] = link->irq.AssignedIRQ;
381 icard.para[1] = link->io.BasePort1;
382 icard.protocol = protocol;
383 icard.typ = ISDN_CTYPE_TELESPCMCIA;
385 i = hisax_init_pcmcia(link, &(((local_info_t*)link->priv)->busy), &icard);
387 printk(KERN_ERR "teles_cs: failed to initialize Teles PCMCIA %d at i/o %#x\n",
388 i, link->io.BasePort1);
389 teles_cs_release(link);
391 ((local_info_t*)link->priv)->cardnr = i;
395 cs_error(link->handle, last_fn, i);
396 teles_cs_release(link);
397 } /* teles_cs_config */
399 /*======================================================================
401 After a card is removed, teles_cs_release() will unregister the net
402 device, and release the PCMCIA configuration. If the device is
403 still open, this will be postponed until it is closed.
405 ======================================================================*/
407 static void teles_cs_release(dev_link_t *link)
409 local_info_t *local = link->priv;
411 DEBUG(0, "teles_cs_release(0x%p)\n", link);
414 if (local->cardnr >= 0) {
415 /* no unregister function with hisax */
416 HiSax_closecard(local->cardnr);
419 /* Unlink the device chain */
422 /* Don't bother checking to see if these succeed or not */
424 pcmcia_release_window(link->win);
425 pcmcia_release_configuration(link->handle);
426 pcmcia_release_io(link->handle, &link->io);
427 pcmcia_release_irq(link->handle, &link->irq);
428 link->state &= ~DEV_CONFIG;
429 } /* teles_cs_release */
431 /*======================================================================
433 The card status event handler. Mostly, this schedules other
434 stuff to run after an event is received. A CARD_REMOVAL event
435 also sets some flags to discourage the net drivers from trying
436 to talk to the card any more.
438 When a CARD_REMOVAL event is received, we immediately set a flag
439 to block future accesses to this device. All the functions that
440 actually access the device should check this flag to make sure
441 the card is still present.
443 ======================================================================*/
445 static int teles_cs_event(event_t event, int priority,
446 event_callback_args_t *args)
448 dev_link_t *link = args->client_data;
449 local_info_t *dev = link->priv;
451 DEBUG(1, "teles_cs_event(%d)\n", event);
454 case CS_EVENT_CARD_REMOVAL:
455 link->state &= ~DEV_PRESENT;
456 if (link->state & DEV_CONFIG) {
457 ((local_info_t*)link->priv)->busy = 1;
458 teles_cs_release(link);
461 case CS_EVENT_CARD_INSERTION:
462 link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
463 teles_cs_config(link);
465 case CS_EVENT_PM_SUSPEND:
466 link->state |= DEV_SUSPEND;
467 /* Fall through... */
468 case CS_EVENT_RESET_PHYSICAL:
469 /* Mark the device as stopped, to block IO until later */
471 if (link->state & DEV_CONFIG)
472 pcmcia_release_configuration(link->handle);
474 case CS_EVENT_PM_RESUME:
475 link->state &= ~DEV_SUSPEND;
476 /* Fall through... */
477 case CS_EVENT_CARD_RESET:
478 if (link->state & DEV_CONFIG)
479 pcmcia_request_configuration(link->handle, &link->conf);
484 } /* teles_cs_event */
486 static struct pcmcia_device_id teles_ids[] = {
487 PCMCIA_DEVICE_PROD_ID12("TELES", "S0/PC", 0x67b50eae, 0xe9e70119),
490 MODULE_DEVICE_TABLE(pcmcia, teles_ids);
492 static struct pcmcia_driver teles_cs_driver = {
493 .owner = THIS_MODULE,
497 .attach = teles_attach,
498 .event = teles_cs_event,
499 .detach = teles_detach,
500 .id_table = teles_ids,
503 static int __init init_teles_cs(void)
505 return pcmcia_register_driver(&teles_cs_driver);
508 static void __exit exit_teles_cs(void)
510 pcmcia_unregister_driver(&teles_cs_driver);
511 BUG_ON(dev_list != NULL);
514 module_init(init_teles_cs);
515 module_exit(exit_teles_cs);