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/version.h>
32 #include <pcmcia/cs_types.h>
33 #include <pcmcia/cs.h>
34 #include <pcmcia/cistpl.h>
35 #include <pcmcia/cisreg.h>
36 #include <pcmcia/ds.h>
37 #include "hisax_cfg.h"
39 MODULE_DESCRIPTION("ISDN4Linux: PCMCIA client driver for Teles PCMCIA cards");
40 MODULE_AUTHOR("Christof Petig, christof.petig@wtal.de, Karsten Keil, kkeil@suse.de");
41 MODULE_LICENSE("GPL");
44 All the PCMCIA modules use PCMCIA_DEBUG to control debugging. If
45 you do not define PCMCIA_DEBUG at all, all the debug code will be
46 left out. If you compile with PCMCIA_DEBUG=0, the debug code will
47 be present but disabled -- but it can then be enabled for specific
48 modules at load time with a 'pc_debug=#' option to insmod.
52 static int pc_debug = PCMCIA_DEBUG;
53 MODULE_PARM(pc_debug, "i");
54 #define DEBUG(n, args...) if (pc_debug>(n)) printk(KERN_DEBUG args);
55 static char *version =
56 "teles_cs.c 2.10 2002/07/30 22:23:34 kkeil";
58 #define DEBUG(n, args...)
61 /*====================================================================*/
63 /* Parameters that can be set with 'insmod' */
65 /* Bit map of interrupts to choose from, the old way */
66 /* This means pick from 15, 14, 12, 11, 10, 9, 7, 5, 4, 3 */
67 static u_long irq_mask = 0xdeb8;
69 /* Newer, simpler way of listing specific interrupts */
70 static int irq_list[4] = { -1 };
72 MODULE_PARM(irq_mask, "i");
73 MODULE_PARM(irq_list, "1-4i");
75 static int protocol = 2; /* EURO-ISDN Default */
76 MODULE_PARM(protocol, "i");
78 /*====================================================================*/
81 The event() function is this driver's Card Services event handler.
82 It will be called by Card Services when an appropriate card status
83 event is received. The config() and release() entry points are
84 used to configure or release a socket, in response to card insertion
85 and ejection events. They are invoked from the teles_cs event
89 static void teles_cs_config(dev_link_t *link);
90 static void teles_cs_release(dev_link_t *link);
91 static int teles_cs_event(event_t event, int priority,
92 event_callback_args_t *args);
95 The attach() and detach() entry points are used to create and destroy
96 "instances" of the driver, where each instance represents everything
97 needed to manage one actual PCMCIA card.
100 static dev_link_t *teles_attach(void);
101 static void teles_detach(dev_link_t *);
104 The dev_info variable is the "key" that is used to match up this
105 device driver with appropriate cards, through the card configuration
109 static dev_info_t dev_info = "teles_cs";
112 A linked list of "instances" of the teles_cs device. Each actual
113 PCMCIA card corresponds to one device instance, and is described
114 by one dev_link_t structure (defined in ds.h).
116 You may not want to use a linked list for this -- for example, the
117 memory card driver uses an array of dev_link_t pointers, where minor
118 device numbers are used to derive the corresponding array index.
121 static dev_link_t *dev_list = NULL;
124 A dev_link_t structure has fields for most things that are needed
125 to keep track of a socket, but there will usually be some device
126 specific information that also needs to be kept track of. The
127 'priv' pointer in a dev_link_t structure can be used to point to
128 a device-specific private data structure, like this.
130 To simplify the data structure handling, we actually include the
131 dev_link_t structure in the device's private data structure.
133 A driver needs to provide a dev_node_t structure for each device
134 on a card. In some cases, there is only one device per card (for
135 example, ethernet cards, modems). In other cases, there may be
136 many actual or logical devices (SCSI adapters, memory cards with
137 multiple partitions). The dev_node_t structures need to be kept
138 in a linked list starting at the 'dev' field of a dev_link_t
139 structure. We allocate them in the card's private data structure,
140 because they generally shouldn't be allocated dynamically.
141 In this case, we also provide a flag to indicate if a device is
142 "stopped" due to a power management event, or card ejection. The
143 device IO routines can use a flag like this to throttle IO to a
144 card that is not ready to accept it.
147 typedef struct local_info_t {
154 /*======================================================================
156 teles_attach() creates an "instance" of the driver, allocatingx
157 local data structures for one device. The device is registered
160 The dev_link structure is initialized, but we don't actually
161 configure the card at this point -- we wait until we receive a
162 card insertion event.
164 ======================================================================*/
166 static dev_link_t *teles_attach(void)
168 client_reg_t client_reg;
173 DEBUG(0, "teles_attach()\n");
175 /* Allocate space for private device-specific data */
176 local = kmalloc(sizeof(local_info_t), GFP_KERNEL);
177 if (!local) return NULL;
178 memset(local, 0, sizeof(local_info_t));
180 link = &local->link; link->priv = local;
182 /* Interrupt setup */
183 link->irq.Attributes = IRQ_TYPE_DYNAMIC_SHARING|IRQ_FIRST_SHARED;
184 link->irq.IRQInfo1 = IRQ_INFO2_VALID|IRQ_LEVEL_ID|IRQ_SHARE_ID;
185 if (irq_list[0] == -1)
186 link->irq.IRQInfo2 = irq_mask;
188 for (i = 0; i < 4; i++)
189 link->irq.IRQInfo2 |= 1 << irq_list[i];
190 link->irq.Handler = NULL;
193 General socket configuration defaults can go here. In this
194 client, we assume very little, and rely on the CIS for almost
195 everything. In most clients, many details (i.e., number, sizes,
196 and attributes of IO windows) are fixed by the nature of the
197 device, and can be hard-wired here.
199 link->io.NumPorts1 = 96;
200 link->io.Attributes1 = IO_DATA_PATH_WIDTH_AUTO;
201 link->io.IOAddrLines = 5;
203 link->conf.Attributes = CONF_ENABLE_IRQ;
205 link->conf.IntType = INT_MEMORY_AND_IO;
207 /* Register with Card Services */
208 link->next = dev_list;
210 client_reg.dev_info = &dev_info;
211 client_reg.Attributes = INFO_IO_CLIENT | INFO_CARD_SHARE;
212 client_reg.EventMask =
213 CS_EVENT_CARD_INSERTION | CS_EVENT_CARD_REMOVAL |
214 CS_EVENT_RESET_PHYSICAL | CS_EVENT_CARD_RESET |
215 CS_EVENT_PM_SUSPEND | CS_EVENT_PM_RESUME;
216 client_reg.event_handler = &teles_cs_event;
217 client_reg.Version = 0x0210;
218 client_reg.event_callback_args.client_data = link;
219 ret = pcmcia_register_client(&link->handle, &client_reg);
220 if (ret != CS_SUCCESS) {
221 cs_error(link->handle, RegisterClient, ret);
229 /*======================================================================
231 This deletes a driver "instance". The device is de-registered
232 with Card Services. If it has been released, all local data
233 structures are freed. Otherwise, the structures will be freed
234 when the device is released.
236 ======================================================================*/
238 static void teles_detach(dev_link_t *link)
241 local_info_t *info = link->priv;
244 DEBUG(0, "teles_detach(0x%p)\n", link);
246 /* Locate device structure */
247 for (linkp = &dev_list; *linkp; linkp = &(*linkp)->next)
248 if (*linkp == link) break;
252 if (link->state & DEV_CONFIG)
253 teles_cs_release(link);
255 /* Break the link with Card Services */
257 ret = pcmcia_deregister_client(link->handle);
258 if (ret != CS_SUCCESS)
259 cs_error(link->handle, DeregisterClient, ret);
262 /* Unlink device structure and free it */
268 /*======================================================================
270 teles_cs_config() is scheduled to run after a CARD_INSERTION event
271 is received, to configure the PCMCIA socket, and to make the
272 device available to the system.
274 ======================================================================*/
275 static int get_tuple(client_handle_t handle, tuple_t *tuple,
278 int i = pcmcia_get_tuple_data(handle, tuple);
279 if (i != CS_SUCCESS) return i;
280 return pcmcia_parse_tuple(handle, tuple, parse);
283 static int first_tuple(client_handle_t handle, tuple_t *tuple,
286 int i = pcmcia_get_first_tuple(handle, tuple);
287 if (i != CS_SUCCESS) return i;
288 return get_tuple(handle, tuple, parse);
291 static int next_tuple(client_handle_t handle, tuple_t *tuple,
294 int i = pcmcia_get_next_tuple(handle, tuple);
295 if (i != CS_SUCCESS) return i;
296 return get_tuple(handle, tuple, parse);
299 static void teles_cs_config(dev_link_t *link)
301 client_handle_t handle;
307 cistpl_cftable_entry_t *cf = &parse.cftable_entry;
310 DEBUG(0, "teles_config(0x%p)\n", link);
311 handle = link->handle;
315 This reads the card's CONFIG tuple to find its configuration
318 tuple.DesiredTuple = CISTPL_CONFIG;
319 tuple.TupleData = (cisdata_t *)buf;
320 tuple.TupleDataMax = 255;
321 tuple.TupleOffset = 0;
322 tuple.Attributes = 0;
323 i = first_tuple(handle, &tuple, &parse);
324 if (i != CS_SUCCESS) {
325 last_fn = ParseTuple;
328 link->conf.ConfigBase = parse.config.base;
329 link->conf.Present = parse.config.rmask[0];
332 link->state |= DEV_CONFIG;
334 tuple.TupleData = (cisdata_t *)buf;
335 tuple.TupleOffset = 0; tuple.TupleDataMax = 255;
336 tuple.Attributes = 0;
337 tuple.DesiredTuple = CISTPL_CFTABLE_ENTRY;
338 i = first_tuple(handle, &tuple, &parse);
339 while (i == CS_SUCCESS) {
340 if ( (cf->io.nwin > 0) && cf->io.win[0].base) {
341 printk(KERN_INFO "(teles_cs: looks like the 96 model)\n");
342 link->conf.ConfigIndex = cf->index;
343 link->io.BasePort1 = cf->io.win[0].base;
344 i = pcmcia_request_io(link->handle, &link->io);
345 if (i == CS_SUCCESS) break;
347 printk(KERN_INFO "(teles_cs: looks like the 97 model)\n");
348 link->conf.ConfigIndex = cf->index;
349 for (i = 0, j = 0x2f0; j > 0x100; j -= 0x10) {
350 link->io.BasePort1 = j;
351 i = pcmcia_request_io(link->handle, &link->io);
352 if (i == CS_SUCCESS) break;
356 i = next_tuple(handle, &tuple, &parse);
359 if (i != CS_SUCCESS) {
364 i = pcmcia_request_irq(link->handle, &link->irq);
365 if (i != CS_SUCCESS) {
366 link->irq.AssignedIRQ = 0;
367 last_fn = RequestIRQ;
371 i = pcmcia_request_configuration(link->handle, &link->conf);
372 if (i != CS_SUCCESS) {
373 last_fn = RequestConfiguration;
377 /* At this point, the dev_node_t structure(s) should be
378 initialized and arranged in a linked list at link->dev. *//* */
379 sprintf(dev->node.dev_name, "teles");
380 dev->node.major = dev->node.minor = 0x0;
382 link->dev = &dev->node;
384 /* Finally, report what we've done */
385 printk(KERN_INFO "%s: index 0x%02x: Vcc %d.%d",
386 dev->node.dev_name, link->conf.ConfigIndex,
387 link->conf.Vcc/10, link->conf.Vcc%10);
389 printk(", Vpp %d.%d", link->conf.Vpp1/10, link->conf.Vpp1%10);
390 if (link->conf.Attributes & CONF_ENABLE_IRQ)
391 printk(", irq %d", link->irq.AssignedIRQ);
392 if (link->io.NumPorts1)
393 printk(", io 0x%04x-0x%04x", link->io.BasePort1,
394 link->io.BasePort1+link->io.NumPorts1-1);
395 if (link->io.NumPorts2)
396 printk(" & 0x%04x-0x%04x", link->io.BasePort2,
397 link->io.BasePort2+link->io.NumPorts2-1);
400 link->state &= ~DEV_CONFIG_PENDING;
402 icard.para[0] = link->irq.AssignedIRQ;
403 icard.para[1] = link->io.BasePort1;
404 icard.protocol = protocol;
405 icard.typ = ISDN_CTYPE_TELESPCMCIA;
407 i = hisax_init_pcmcia(link, &(((local_info_t*)link->priv)->busy), &icard);
409 printk(KERN_ERR "teles_cs: failed to initialize Teles PCMCIA %d at i/o %#x\n",
410 i, link->io.BasePort1);
411 teles_cs_release(link);
413 ((local_info_t*)link->priv)->cardnr = i;
417 cs_error(link->handle, last_fn, i);
418 teles_cs_release(link);
419 } /* teles_cs_config */
421 /*======================================================================
423 After a card is removed, teles_cs_release() will unregister the net
424 device, and release the PCMCIA configuration. If the device is
425 still open, this will be postponed until it is closed.
427 ======================================================================*/
429 static void teles_cs_release(dev_link_t *link)
431 local_info_t *local = link->priv;
433 DEBUG(0, "teles_cs_release(0x%p)\n", link);
436 if (local->cardnr >= 0) {
437 /* no unregister function with hisax */
438 HiSax_closecard(local->cardnr);
441 /* Unlink the device chain */
444 /* Don't bother checking to see if these succeed or not */
446 pcmcia_release_window(link->win);
447 pcmcia_release_configuration(link->handle);
448 pcmcia_release_io(link->handle, &link->io);
449 pcmcia_release_irq(link->handle, &link->irq);
450 link->state &= ~DEV_CONFIG;
451 } /* teles_cs_release */
453 /*======================================================================
455 The card status event handler. Mostly, this schedules other
456 stuff to run after an event is received. A CARD_REMOVAL event
457 also sets some flags to discourage the net drivers from trying
458 to talk to the card any more.
460 When a CARD_REMOVAL event is received, we immediately set a flag
461 to block future accesses to this device. All the functions that
462 actually access the device should check this flag to make sure
463 the card is still present.
465 ======================================================================*/
467 static int teles_cs_event(event_t event, int priority,
468 event_callback_args_t *args)
470 dev_link_t *link = args->client_data;
471 local_info_t *dev = link->priv;
473 DEBUG(1, "teles_cs_event(%d)\n", event);
476 case CS_EVENT_CARD_REMOVAL:
477 link->state &= ~DEV_PRESENT;
478 if (link->state & DEV_CONFIG) {
479 ((local_info_t*)link->priv)->busy = 1;
480 teles_cs_release(link);
483 case CS_EVENT_CARD_INSERTION:
484 link->state |= DEV_PRESENT | DEV_CONFIG_PENDING;
485 teles_cs_config(link);
487 case CS_EVENT_PM_SUSPEND:
488 link->state |= DEV_SUSPEND;
489 /* Fall through... */
490 case CS_EVENT_RESET_PHYSICAL:
491 /* Mark the device as stopped, to block IO until later */
493 if (link->state & DEV_CONFIG)
494 pcmcia_release_configuration(link->handle);
496 case CS_EVENT_PM_RESUME:
497 link->state &= ~DEV_SUSPEND;
498 /* Fall through... */
499 case CS_EVENT_CARD_RESET:
500 if (link->state & DEV_CONFIG)
501 pcmcia_request_configuration(link->handle, &link->conf);
506 } /* teles_cs_event */
508 static struct pcmcia_driver teles_cs_driver = {
509 .owner = THIS_MODULE,
513 .attach = teles_attach,
514 .detach = teles_detach,
517 static int __init init_teles_cs(void)
519 return pcmcia_register_driver(&teles_cs_driver);
522 static void __exit exit_teles_cs(void)
524 pcmcia_unregister_driver(&teles_cs_driver);
526 /* XXX: this really needs to move into generic code.. */
527 while (dev_list != NULL)
528 teles_detach(dev_list);
531 module_init(init_teles_cs);
532 module_exit(exit_teles_cs);