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1da177e4 LT |
1 | /* |
2 | * ds.c -- 16-bit PCMCIA core support | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * The initial developer of the original code is David A. Hinds | |
9 | * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds | |
10 | * are Copyright (C) 1999 David A. Hinds. All Rights Reserved. | |
11 | * | |
12 | * (C) 1999 David A. Hinds | |
13 | * (C) 2003 - 2004 Dominik Brodowski | |
14 | */ | |
15 | ||
16 | #include <linux/config.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/moduleparam.h> | |
19 | #include <linux/init.h> | |
20 | #include <linux/kernel.h> | |
21 | #include <linux/major.h> | |
22 | #include <linux/string.h> | |
23 | #include <linux/errno.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/mm.h> | |
26 | #include <linux/fcntl.h> | |
27 | #include <linux/sched.h> | |
28 | #include <linux/smp_lock.h> | |
29 | #include <linux/timer.h> | |
30 | #include <linux/ioctl.h> | |
31 | #include <linux/proc_fs.h> | |
32 | #include <linux/poll.h> | |
33 | #include <linux/pci.h> | |
34 | #include <linux/list.h> | |
35 | #include <linux/delay.h> | |
36 | #include <linux/kref.h> | |
37 | #include <linux/workqueue.h> | |
840c2ac5 | 38 | #include <linux/crc32.h> |
1da177e4 LT |
39 | |
40 | #include <asm/atomic.h> | |
41 | ||
42 | #define IN_CARD_SERVICES | |
43 | #include <pcmcia/version.h> | |
44 | #include <pcmcia/cs_types.h> | |
45 | #include <pcmcia/cs.h> | |
46 | #include <pcmcia/bulkmem.h> | |
47 | #include <pcmcia/cistpl.h> | |
48 | #include <pcmcia/ds.h> | |
49 | #include <pcmcia/ss.h> | |
50 | ||
51 | #include "cs_internal.h" | |
52 | ||
53 | /*====================================================================*/ | |
54 | ||
55 | /* Module parameters */ | |
56 | ||
57 | MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); | |
58 | MODULE_DESCRIPTION("PCMCIA Driver Services"); | |
59 | MODULE_LICENSE("GPL"); | |
60 | ||
61 | #ifdef DEBUG | |
62 | int ds_pc_debug; | |
63 | ||
64 | module_param_named(pc_debug, ds_pc_debug, int, 0644); | |
65 | ||
66 | #define ds_dbg(lvl, fmt, arg...) do { \ | |
67 | if (ds_pc_debug > (lvl)) \ | |
68 | printk(KERN_DEBUG "ds: " fmt , ## arg); \ | |
69 | } while (0) | |
70 | #else | |
71 | #define ds_dbg(lvl, fmt, arg...) do { } while (0) | |
72 | #endif | |
73 | ||
74 | /*====================================================================*/ | |
75 | ||
76 | /* Device user information */ | |
77 | #define MAX_EVENTS 32 | |
78 | #define USER_MAGIC 0x7ea4 | |
79 | #define CHECK_USER(u) \ | |
80 | (((u) == NULL) || ((u)->user_magic != USER_MAGIC)) | |
81 | typedef struct user_info_t { | |
82 | u_int user_magic; | |
83 | int event_head, event_tail; | |
84 | event_t event[MAX_EVENTS]; | |
85 | struct user_info_t *next; | |
86 | struct pcmcia_bus_socket *socket; | |
87 | } user_info_t; | |
88 | ||
89 | /* Socket state information */ | |
90 | struct pcmcia_bus_socket { | |
91 | struct kref refcount; | |
92 | struct pcmcia_callback callback; | |
93 | int state; | |
94 | user_info_t *user; | |
95 | wait_queue_head_t queue; | |
96 | struct pcmcia_socket *parent; | |
97 | ||
98 | /* the PCMCIA devices connected to this socket (normally one, more | |
99 | * for multifunction devices: */ | |
100 | struct list_head devices_list; | |
101 | u8 device_count; /* the number of devices, used | |
102 | * only internally and subject | |
103 | * to incorrectness and change */ | |
104 | }; | |
105 | static spinlock_t pcmcia_dev_list_lock; | |
106 | ||
107 | #define DS_SOCKET_PRESENT 0x01 | |
108 | #define DS_SOCKET_BUSY 0x02 | |
109 | #define DS_SOCKET_REMOVAL_PENDING 0x10 | |
110 | #define DS_SOCKET_DEAD 0x80 | |
111 | ||
112 | /*====================================================================*/ | |
113 | ||
114 | static int major_dev = -1; | |
115 | ||
116 | static int unbind_request(struct pcmcia_bus_socket *s); | |
117 | ||
118 | /*====================================================================*/ | |
119 | ||
120 | /* code which was in cs.c before */ | |
121 | ||
122 | /* String tables for error messages */ | |
123 | ||
124 | typedef struct lookup_t { | |
125 | int key; | |
126 | char *msg; | |
127 | } lookup_t; | |
128 | ||
129 | static const lookup_t error_table[] = { | |
130 | { CS_SUCCESS, "Operation succeeded" }, | |
131 | { CS_BAD_ADAPTER, "Bad adapter" }, | |
132 | { CS_BAD_ATTRIBUTE, "Bad attribute", }, | |
133 | { CS_BAD_BASE, "Bad base address" }, | |
134 | { CS_BAD_EDC, "Bad EDC" }, | |
135 | { CS_BAD_IRQ, "Bad IRQ" }, | |
136 | { CS_BAD_OFFSET, "Bad offset" }, | |
137 | { CS_BAD_PAGE, "Bad page number" }, | |
138 | { CS_READ_FAILURE, "Read failure" }, | |
139 | { CS_BAD_SIZE, "Bad size" }, | |
140 | { CS_BAD_SOCKET, "Bad socket" }, | |
141 | { CS_BAD_TYPE, "Bad type" }, | |
142 | { CS_BAD_VCC, "Bad Vcc" }, | |
143 | { CS_BAD_VPP, "Bad Vpp" }, | |
144 | { CS_BAD_WINDOW, "Bad window" }, | |
145 | { CS_WRITE_FAILURE, "Write failure" }, | |
146 | { CS_NO_CARD, "No card present" }, | |
147 | { CS_UNSUPPORTED_FUNCTION, "Usupported function" }, | |
148 | { CS_UNSUPPORTED_MODE, "Unsupported mode" }, | |
149 | { CS_BAD_SPEED, "Bad speed" }, | |
150 | { CS_BUSY, "Resource busy" }, | |
151 | { CS_GENERAL_FAILURE, "General failure" }, | |
152 | { CS_WRITE_PROTECTED, "Write protected" }, | |
153 | { CS_BAD_ARG_LENGTH, "Bad argument length" }, | |
154 | { CS_BAD_ARGS, "Bad arguments" }, | |
155 | { CS_CONFIGURATION_LOCKED, "Configuration locked" }, | |
156 | { CS_IN_USE, "Resource in use" }, | |
157 | { CS_NO_MORE_ITEMS, "No more items" }, | |
158 | { CS_OUT_OF_RESOURCE, "Out of resource" }, | |
159 | { CS_BAD_HANDLE, "Bad handle" }, | |
160 | { CS_BAD_TUPLE, "Bad CIS tuple" } | |
161 | }; | |
162 | ||
163 | ||
164 | static const lookup_t service_table[] = { | |
165 | { AccessConfigurationRegister, "AccessConfigurationRegister" }, | |
166 | { AddSocketServices, "AddSocketServices" }, | |
167 | { AdjustResourceInfo, "AdjustResourceInfo" }, | |
168 | { CheckEraseQueue, "CheckEraseQueue" }, | |
169 | { CloseMemory, "CloseMemory" }, | |
170 | { DeregisterClient, "DeregisterClient" }, | |
171 | { DeregisterEraseQueue, "DeregisterEraseQueue" }, | |
172 | { GetCardServicesInfo, "GetCardServicesInfo" }, | |
173 | { GetClientInfo, "GetClientInfo" }, | |
174 | { GetConfigurationInfo, "GetConfigurationInfo" }, | |
175 | { GetEventMask, "GetEventMask" }, | |
176 | { GetFirstClient, "GetFirstClient" }, | |
177 | { GetFirstRegion, "GetFirstRegion" }, | |
178 | { GetFirstTuple, "GetFirstTuple" }, | |
179 | { GetNextClient, "GetNextClient" }, | |
180 | { GetNextRegion, "GetNextRegion" }, | |
181 | { GetNextTuple, "GetNextTuple" }, | |
182 | { GetStatus, "GetStatus" }, | |
183 | { GetTupleData, "GetTupleData" }, | |
184 | { MapMemPage, "MapMemPage" }, | |
185 | { ModifyConfiguration, "ModifyConfiguration" }, | |
186 | { ModifyWindow, "ModifyWindow" }, | |
187 | { OpenMemory, "OpenMemory" }, | |
188 | { ParseTuple, "ParseTuple" }, | |
189 | { ReadMemory, "ReadMemory" }, | |
190 | { RegisterClient, "RegisterClient" }, | |
191 | { RegisterEraseQueue, "RegisterEraseQueue" }, | |
192 | { RegisterMTD, "RegisterMTD" }, | |
193 | { ReleaseConfiguration, "ReleaseConfiguration" }, | |
194 | { ReleaseIO, "ReleaseIO" }, | |
195 | { ReleaseIRQ, "ReleaseIRQ" }, | |
196 | { ReleaseWindow, "ReleaseWindow" }, | |
197 | { RequestConfiguration, "RequestConfiguration" }, | |
198 | { RequestIO, "RequestIO" }, | |
199 | { RequestIRQ, "RequestIRQ" }, | |
200 | { RequestSocketMask, "RequestSocketMask" }, | |
201 | { RequestWindow, "RequestWindow" }, | |
202 | { ResetCard, "ResetCard" }, | |
203 | { SetEventMask, "SetEventMask" }, | |
204 | { ValidateCIS, "ValidateCIS" }, | |
205 | { WriteMemory, "WriteMemory" }, | |
206 | { BindDevice, "BindDevice" }, | |
207 | { BindMTD, "BindMTD" }, | |
208 | { ReportError, "ReportError" }, | |
209 | { SuspendCard, "SuspendCard" }, | |
210 | { ResumeCard, "ResumeCard" }, | |
211 | { EjectCard, "EjectCard" }, | |
212 | { InsertCard, "InsertCard" }, | |
213 | { ReplaceCIS, "ReplaceCIS" } | |
214 | }; | |
215 | ||
216 | ||
217 | int pcmcia_report_error(client_handle_t handle, error_info_t *err) | |
218 | { | |
219 | int i; | |
220 | char *serv; | |
221 | ||
222 | if (CHECK_HANDLE(handle)) | |
223 | printk(KERN_NOTICE); | |
224 | else { | |
225 | struct pcmcia_device *p_dev = handle_to_pdev(handle); | |
226 | printk(KERN_NOTICE "%s: ", p_dev->dev.bus_id); | |
227 | } | |
228 | ||
229 | for (i = 0; i < ARRAY_SIZE(service_table); i++) | |
230 | if (service_table[i].key == err->func) | |
231 | break; | |
232 | if (i < ARRAY_SIZE(service_table)) | |
233 | serv = service_table[i].msg; | |
234 | else | |
235 | serv = "Unknown service number"; | |
236 | ||
237 | for (i = 0; i < ARRAY_SIZE(error_table); i++) | |
238 | if (error_table[i].key == err->retcode) | |
239 | break; | |
240 | if (i < ARRAY_SIZE(error_table)) | |
241 | printk("%s: %s\n", serv, error_table[i].msg); | |
242 | else | |
243 | printk("%s: Unknown error code %#x\n", serv, err->retcode); | |
244 | ||
245 | return CS_SUCCESS; | |
246 | } /* report_error */ | |
247 | EXPORT_SYMBOL(pcmcia_report_error); | |
248 | ||
249 | /* end of code which was in cs.c before */ | |
250 | ||
251 | /*======================================================================*/ | |
252 | ||
253 | void cs_error(client_handle_t handle, int func, int ret) | |
254 | { | |
255 | error_info_t err = { func, ret }; | |
256 | pcmcia_report_error(handle, &err); | |
257 | } | |
258 | EXPORT_SYMBOL(cs_error); | |
259 | ||
260 | /*======================================================================*/ | |
261 | ||
262 | static struct pcmcia_driver * get_pcmcia_driver (dev_info_t *dev_info); | |
263 | static struct pcmcia_bus_socket * get_socket_info_by_nr(unsigned int nr); | |
264 | ||
265 | static void pcmcia_release_bus_socket(struct kref *refcount) | |
266 | { | |
267 | struct pcmcia_bus_socket *s = container_of(refcount, struct pcmcia_bus_socket, refcount); | |
268 | pcmcia_put_socket(s->parent); | |
269 | kfree(s); | |
270 | } | |
271 | ||
272 | static void pcmcia_put_bus_socket(struct pcmcia_bus_socket *s) | |
273 | { | |
274 | kref_put(&s->refcount, pcmcia_release_bus_socket); | |
275 | } | |
276 | ||
277 | static struct pcmcia_bus_socket *pcmcia_get_bus_socket(struct pcmcia_bus_socket *s) | |
278 | { | |
279 | kref_get(&s->refcount); | |
280 | return (s); | |
281 | } | |
282 | ||
283 | /** | |
284 | * pcmcia_register_driver - register a PCMCIA driver with the bus core | |
285 | * | |
286 | * Registers a PCMCIA driver with the PCMCIA bus core. | |
287 | */ | |
288 | static int pcmcia_device_probe(struct device *dev); | |
289 | static int pcmcia_device_remove(struct device * dev); | |
290 | ||
291 | int pcmcia_register_driver(struct pcmcia_driver *driver) | |
292 | { | |
293 | if (!driver) | |
294 | return -EINVAL; | |
295 | ||
296 | /* initialize common fields */ | |
297 | driver->drv.bus = &pcmcia_bus_type; | |
298 | driver->drv.owner = driver->owner; | |
299 | driver->drv.probe = pcmcia_device_probe; | |
300 | driver->drv.remove = pcmcia_device_remove; | |
301 | ||
302 | return driver_register(&driver->drv); | |
303 | } | |
304 | EXPORT_SYMBOL(pcmcia_register_driver); | |
305 | ||
306 | /** | |
307 | * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core | |
308 | */ | |
309 | void pcmcia_unregister_driver(struct pcmcia_driver *driver) | |
310 | { | |
311 | driver_unregister(&driver->drv); | |
312 | } | |
313 | EXPORT_SYMBOL(pcmcia_unregister_driver); | |
314 | ||
315 | #ifdef CONFIG_PROC_FS | |
316 | static struct proc_dir_entry *proc_pccard = NULL; | |
317 | ||
318 | static int proc_read_drivers_callback(struct device_driver *driver, void *d) | |
319 | { | |
320 | char **p = d; | |
321 | struct pcmcia_driver *p_drv = container_of(driver, | |
322 | struct pcmcia_driver, drv); | |
323 | ||
324 | *p += sprintf(*p, "%-24.24s 1 %d\n", p_drv->drv.name, | |
325 | #ifdef CONFIG_MODULE_UNLOAD | |
326 | (p_drv->owner) ? module_refcount(p_drv->owner) : 1 | |
327 | #else | |
328 | 1 | |
329 | #endif | |
330 | ); | |
331 | d = (void *) p; | |
332 | ||
333 | return 0; | |
334 | } | |
335 | ||
336 | static int proc_read_drivers(char *buf, char **start, off_t pos, | |
337 | int count, int *eof, void *data) | |
338 | { | |
339 | char *p = buf; | |
340 | ||
341 | bus_for_each_drv(&pcmcia_bus_type, NULL, | |
342 | (void *) &p, proc_read_drivers_callback); | |
343 | ||
344 | return (p - buf); | |
345 | } | |
346 | #endif | |
347 | ||
348 | /* pcmcia_device handling */ | |
349 | ||
350 | static struct pcmcia_device * pcmcia_get_dev(struct pcmcia_device *p_dev) | |
351 | { | |
352 | struct device *tmp_dev; | |
353 | tmp_dev = get_device(&p_dev->dev); | |
354 | if (!tmp_dev) | |
355 | return NULL; | |
356 | return to_pcmcia_dev(tmp_dev); | |
357 | } | |
358 | ||
359 | static void pcmcia_put_dev(struct pcmcia_device *p_dev) | |
360 | { | |
361 | if (p_dev) | |
362 | put_device(&p_dev->dev); | |
363 | } | |
364 | ||
365 | static void pcmcia_release_dev(struct device *dev) | |
366 | { | |
367 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); | |
368 | ds_dbg(1, "releasing dev %p\n", p_dev); | |
369 | pcmcia_put_bus_socket(p_dev->socket->pcmcia); | |
370 | kfree(p_dev); | |
371 | } | |
372 | ||
373 | ||
374 | static int pcmcia_device_probe(struct device * dev) | |
375 | { | |
376 | struct pcmcia_device *p_dev; | |
377 | struct pcmcia_driver *p_drv; | |
378 | int ret = 0; | |
379 | ||
380 | dev = get_device(dev); | |
381 | if (!dev) | |
382 | return -ENODEV; | |
383 | ||
384 | p_dev = to_pcmcia_dev(dev); | |
385 | p_drv = to_pcmcia_drv(dev->driver); | |
386 | ||
387 | if (!try_module_get(p_drv->owner)) { | |
388 | ret = -EINVAL; | |
389 | goto put_dev; | |
390 | } | |
391 | ||
392 | if (p_drv->attach) { | |
393 | p_dev->instance = p_drv->attach(); | |
394 | if ((!p_dev->instance) || (p_dev->client.state & CLIENT_UNBOUND)) { | |
395 | printk(KERN_NOTICE "ds: unable to create instance " | |
396 | "of '%s'!\n", p_drv->drv.name); | |
397 | ret = -EINVAL; | |
398 | } | |
399 | } | |
400 | ||
401 | if (ret) | |
402 | module_put(p_drv->owner); | |
403 | put_dev: | |
404 | if ((ret) || !(p_drv->attach)) | |
405 | put_device(dev); | |
406 | return (ret); | |
407 | } | |
408 | ||
409 | ||
410 | static int pcmcia_device_remove(struct device * dev) | |
411 | { | |
412 | struct pcmcia_device *p_dev; | |
413 | struct pcmcia_driver *p_drv; | |
414 | ||
415 | /* detach the "instance" */ | |
416 | p_dev = to_pcmcia_dev(dev); | |
417 | p_drv = to_pcmcia_drv(dev->driver); | |
418 | ||
419 | if (p_drv) { | |
420 | if ((p_drv->detach) && (p_dev->instance)) { | |
421 | p_drv->detach(p_dev->instance); | |
422 | /* from pcmcia_probe_device */ | |
423 | put_device(&p_dev->dev); | |
424 | } | |
425 | module_put(p_drv->owner); | |
426 | } | |
427 | ||
428 | return 0; | |
429 | } | |
430 | ||
431 | ||
432 | ||
433 | /* | |
434 | * pcmcia_device_query -- determine information about a pcmcia device | |
435 | */ | |
436 | static int pcmcia_device_query(struct pcmcia_device *p_dev) | |
437 | { | |
438 | cistpl_manfid_t manf_id; | |
439 | cistpl_funcid_t func_id; | |
440 | cistpl_vers_1_t vers1; | |
441 | unsigned int i; | |
442 | ||
443 | if (!pccard_read_tuple(p_dev->socket, p_dev->func, | |
444 | CISTPL_MANFID, &manf_id)) { | |
445 | p_dev->manf_id = manf_id.manf; | |
446 | p_dev->card_id = manf_id.card; | |
447 | p_dev->has_manf_id = 1; | |
448 | p_dev->has_card_id = 1; | |
449 | } | |
450 | ||
451 | if (!pccard_read_tuple(p_dev->socket, p_dev->func, | |
452 | CISTPL_FUNCID, &func_id)) { | |
453 | p_dev->func_id = func_id.func; | |
454 | p_dev->has_func_id = 1; | |
455 | } else { | |
456 | /* rule of thumb: cards with no FUNCID, but with | |
457 | * common memory device geometry information, are | |
458 | * probably memory cards (from pcmcia-cs) */ | |
459 | cistpl_device_geo_t devgeo; | |
460 | if (!pccard_read_tuple(p_dev->socket, p_dev->func, | |
461 | CISTPL_DEVICE_GEO, &devgeo)) { | |
462 | ds_dbg(0, "mem device geometry probably means " | |
463 | "FUNCID_MEMORY\n"); | |
464 | p_dev->func_id = CISTPL_FUNCID_MEMORY; | |
465 | p_dev->has_func_id = 1; | |
466 | } | |
467 | } | |
468 | ||
469 | if (!pccard_read_tuple(p_dev->socket, p_dev->func, CISTPL_VERS_1, | |
470 | &vers1)) { | |
471 | for (i=0; i < vers1.ns; i++) { | |
472 | char *tmp; | |
473 | unsigned int length; | |
474 | ||
475 | tmp = vers1.str + vers1.ofs[i]; | |
476 | ||
477 | length = strlen(tmp) + 1; | |
478 | if ((length < 3) || (length > 255)) | |
479 | continue; | |
480 | ||
481 | p_dev->prod_id[i] = kmalloc(sizeof(char) * length, | |
482 | GFP_KERNEL); | |
483 | if (!p_dev->prod_id[i]) | |
484 | continue; | |
485 | ||
486 | p_dev->prod_id[i] = strncpy(p_dev->prod_id[i], | |
487 | tmp, length); | |
488 | } | |
489 | } | |
490 | ||
491 | return 0; | |
492 | } | |
493 | ||
494 | ||
495 | /* device_add_lock is needed to avoid double registration by cardmgr and kernel. | |
496 | * Serializes pcmcia_device_add; will most likely be removed in future. | |
497 | * | |
498 | * While it has the caveat that adding new PCMCIA devices inside(!) device_register() | |
499 | * won't work, this doesn't matter much at the moment: the driver core doesn't | |
500 | * support it either. | |
501 | */ | |
502 | static DECLARE_MUTEX(device_add_lock); | |
503 | ||
504 | static struct pcmcia_device * pcmcia_device_add(struct pcmcia_bus_socket *s, unsigned int function) | |
505 | { | |
506 | struct pcmcia_device *p_dev; | |
507 | unsigned long flags; | |
508 | ||
509 | s = pcmcia_get_bus_socket(s); | |
510 | if (!s) | |
511 | return NULL; | |
512 | ||
513 | down(&device_add_lock); | |
514 | ||
515 | p_dev = kmalloc(sizeof(struct pcmcia_device), GFP_KERNEL); | |
516 | if (!p_dev) | |
517 | goto err_put; | |
518 | memset(p_dev, 0, sizeof(struct pcmcia_device)); | |
519 | ||
520 | p_dev->socket = s->parent; | |
521 | p_dev->device_no = (s->device_count++); | |
522 | p_dev->func = function; | |
523 | ||
524 | p_dev->dev.bus = &pcmcia_bus_type; | |
525 | p_dev->dev.parent = s->parent->dev.dev; | |
526 | p_dev->dev.release = pcmcia_release_dev; | |
527 | sprintf (p_dev->dev.bus_id, "%d.%d", p_dev->socket->sock, p_dev->device_no); | |
528 | ||
529 | /* compat */ | |
530 | p_dev->client.client_magic = CLIENT_MAGIC; | |
531 | p_dev->client.Socket = s->parent; | |
532 | p_dev->client.Function = function; | |
533 | p_dev->client.state = CLIENT_UNBOUND; | |
534 | ||
535 | /* Add to the list in pcmcia_bus_socket */ | |
536 | spin_lock_irqsave(&pcmcia_dev_list_lock, flags); | |
537 | list_add_tail(&p_dev->socket_device_list, &s->devices_list); | |
538 | spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); | |
539 | ||
540 | if (device_register(&p_dev->dev)) { | |
541 | spin_lock_irqsave(&pcmcia_dev_list_lock, flags); | |
542 | list_del(&p_dev->socket_device_list); | |
543 | spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); | |
544 | ||
545 | goto err_free; | |
546 | } | |
547 | ||
548 | up(&device_add_lock); | |
549 | ||
550 | return p_dev; | |
551 | ||
552 | err_free: | |
553 | kfree(p_dev); | |
554 | s->device_count--; | |
555 | err_put: | |
556 | up(&device_add_lock); | |
557 | pcmcia_put_bus_socket(s); | |
558 | ||
559 | return NULL; | |
560 | } | |
561 | ||
562 | ||
563 | static int pcmcia_card_add(struct pcmcia_socket *s) | |
564 | { | |
565 | cisinfo_t cisinfo; | |
566 | cistpl_longlink_mfc_t mfc; | |
567 | unsigned int no_funcs, i; | |
568 | int ret = 0; | |
569 | ||
570 | if (!(s->resource_setup_done)) | |
571 | return -EAGAIN; /* try again, but later... */ | |
572 | ||
573 | pcmcia_validate_mem(s); | |
574 | ret = pccard_validate_cis(s, BIND_FN_ALL, &cisinfo); | |
575 | if (ret || !cisinfo.Chains) { | |
576 | ds_dbg(0, "invalid CIS or invalid resources\n"); | |
577 | return -ENODEV; | |
578 | } | |
579 | ||
580 | if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, &mfc)) | |
581 | no_funcs = mfc.nfn; | |
582 | else | |
583 | no_funcs = 1; | |
584 | ||
585 | /* this doesn't handle multifunction devices on one pcmcia function | |
586 | * yet. */ | |
587 | for (i=0; i < no_funcs; i++) | |
588 | pcmcia_device_add(s->pcmcia, i); | |
589 | ||
590 | return (ret); | |
591 | } | |
592 | ||
593 | ||
594 | static int pcmcia_bus_match(struct device * dev, struct device_driver * drv) { | |
595 | struct pcmcia_device * p_dev = to_pcmcia_dev(dev); | |
596 | struct pcmcia_driver * p_drv = to_pcmcia_drv(drv); | |
597 | ||
598 | /* matching by cardmgr */ | |
599 | if (p_dev->cardmgr == p_drv) | |
600 | return 1; | |
601 | ||
602 | return 0; | |
603 | } | |
604 | ||
840c2ac5 DB |
605 | #ifdef CONFIG_HOTPLUG |
606 | ||
607 | static int pcmcia_bus_hotplug(struct device *dev, char **envp, int num_envp, | |
608 | char *buffer, int buffer_size) | |
609 | { | |
610 | struct pcmcia_device *p_dev; | |
611 | int i, length = 0; | |
612 | u32 hash[4] = { 0, 0, 0, 0}; | |
613 | ||
614 | if (!dev) | |
615 | return -ENODEV; | |
616 | ||
617 | p_dev = to_pcmcia_dev(dev); | |
618 | ||
619 | /* calculate hashes */ | |
620 | for (i=0; i<4; i++) { | |
621 | if (!p_dev->prod_id[i]) | |
622 | continue; | |
623 | hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i])); | |
624 | } | |
625 | ||
626 | i = 0; | |
627 | ||
628 | if (add_hotplug_env_var(envp, num_envp, &i, | |
629 | buffer, buffer_size, &length, | |
630 | "SOCKET_NO=%u", | |
631 | p_dev->socket->sock)) | |
632 | return -ENOMEM; | |
633 | ||
634 | if (add_hotplug_env_var(envp, num_envp, &i, | |
635 | buffer, buffer_size, &length, | |
636 | "DEVICE_NO=%02X", | |
637 | p_dev->device_no)) | |
638 | return -ENOMEM; | |
639 | ||
640 | if (add_hotplug_env_var(envp, num_envp, &i, | |
641 | buffer, buffer_size, &length, | |
642 | "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" | |
643 | "pa%08Xpb%08Xpc%08Xpd%08X", | |
644 | p_dev->has_manf_id ? p_dev->manf_id : 0, | |
645 | p_dev->has_card_id ? p_dev->card_id : 0, | |
646 | p_dev->has_func_id ? p_dev->func_id : 0, | |
647 | p_dev->func, | |
648 | p_dev->device_no, | |
649 | hash[0], | |
650 | hash[1], | |
651 | hash[2], | |
652 | hash[3])) | |
653 | return -ENOMEM; | |
654 | ||
655 | envp[i] = NULL; | |
656 | ||
657 | return 0; | |
658 | } | |
659 | ||
660 | #else | |
661 | ||
662 | static int pcmcia_bus_hotplug(struct device *dev, char **envp, int num_envp, | |
663 | char *buffer, int buffer_size) | |
664 | { | |
665 | return -ENODEV; | |
666 | } | |
667 | ||
668 | #endif | |
669 | ||
1da177e4 LT |
670 | /************************ per-device sysfs output ***************************/ |
671 | ||
672 | #define pcmcia_device_attr(field, test, format) \ | |
e404e274 | 673 | static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
674 | { \ |
675 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ | |
676 | return p_dev->test ? sprintf (buf, format, p_dev->field) : -ENODEV; \ | |
677 | } | |
678 | ||
679 | #define pcmcia_device_stringattr(name, field) \ | |
e404e274 | 680 | static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
681 | { \ |
682 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ | |
683 | return p_dev->field ? sprintf (buf, "%s\n", p_dev->field) : -ENODEV; \ | |
684 | } | |
685 | ||
686 | pcmcia_device_attr(func, socket, "0x%02x\n"); | |
687 | pcmcia_device_attr(func_id, has_func_id, "0x%02x\n"); | |
688 | pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n"); | |
689 | pcmcia_device_attr(card_id, has_card_id, "0x%04x\n"); | |
690 | pcmcia_device_stringattr(prod_id1, prod_id[0]); | |
691 | pcmcia_device_stringattr(prod_id2, prod_id[1]); | |
692 | pcmcia_device_stringattr(prod_id3, prod_id[2]); | |
693 | pcmcia_device_stringattr(prod_id4, prod_id[3]); | |
694 | ||
695 | static struct device_attribute pcmcia_dev_attrs[] = { | |
696 | __ATTR(function, 0444, func_show, NULL), | |
697 | __ATTR_RO(func_id), | |
698 | __ATTR_RO(manf_id), | |
699 | __ATTR_RO(card_id), | |
700 | __ATTR_RO(prod_id1), | |
701 | __ATTR_RO(prod_id2), | |
702 | __ATTR_RO(prod_id3), | |
703 | __ATTR_RO(prod_id4), | |
704 | __ATTR_NULL, | |
705 | }; | |
706 | ||
707 | ||
708 | /*====================================================================== | |
709 | ||
710 | These manage a ring buffer of events pending for one user process | |
711 | ||
712 | ======================================================================*/ | |
713 | ||
714 | static int queue_empty(user_info_t *user) | |
715 | { | |
716 | return (user->event_head == user->event_tail); | |
717 | } | |
718 | ||
719 | static event_t get_queued_event(user_info_t *user) | |
720 | { | |
721 | user->event_tail = (user->event_tail+1) % MAX_EVENTS; | |
722 | return user->event[user->event_tail]; | |
723 | } | |
724 | ||
725 | static void queue_event(user_info_t *user, event_t event) | |
726 | { | |
727 | user->event_head = (user->event_head+1) % MAX_EVENTS; | |
728 | if (user->event_head == user->event_tail) | |
729 | user->event_tail = (user->event_tail+1) % MAX_EVENTS; | |
730 | user->event[user->event_head] = event; | |
731 | } | |
732 | ||
733 | static void handle_event(struct pcmcia_bus_socket *s, event_t event) | |
734 | { | |
735 | user_info_t *user; | |
736 | for (user = s->user; user; user = user->next) | |
737 | queue_event(user, event); | |
738 | wake_up_interruptible(&s->queue); | |
739 | } | |
740 | ||
741 | ||
742 | /*====================================================================== | |
743 | ||
744 | The card status event handler. | |
745 | ||
746 | ======================================================================*/ | |
747 | ||
748 | struct send_event_data { | |
749 | struct pcmcia_socket *skt; | |
750 | event_t event; | |
751 | int priority; | |
752 | }; | |
753 | ||
754 | static int send_event_callback(struct device *dev, void * _data) | |
755 | { | |
756 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); | |
757 | struct send_event_data *data = _data; | |
758 | ||
759 | /* we get called for all sockets, but may only pass the event | |
760 | * for drivers _on the affected socket_ */ | |
761 | if (p_dev->socket != data->skt) | |
762 | return 0; | |
763 | ||
764 | if (p_dev->client.state & (CLIENT_UNBOUND|CLIENT_STALE)) | |
765 | return 0; | |
766 | ||
767 | if (p_dev->client.EventMask & data->event) | |
768 | return EVENT(&p_dev->client, data->event, data->priority); | |
769 | ||
770 | return 0; | |
771 | } | |
772 | ||
773 | static int send_event(struct pcmcia_socket *s, event_t event, int priority) | |
774 | { | |
775 | int ret = 0; | |
776 | struct send_event_data private; | |
777 | struct pcmcia_bus_socket *skt = pcmcia_get_bus_socket(s->pcmcia); | |
778 | ||
779 | if (!skt) | |
780 | return 0; | |
781 | ||
782 | private.skt = s; | |
783 | private.event = event; | |
784 | private.priority = priority; | |
785 | ||
786 | ret = bus_for_each_dev(&pcmcia_bus_type, NULL, &private, send_event_callback); | |
787 | ||
788 | pcmcia_put_bus_socket(skt); | |
789 | return ret; | |
790 | } /* send_event */ | |
791 | ||
792 | ||
793 | /* Normally, the event is passed to individual drivers after | |
794 | * informing userspace. Only for CS_EVENT_CARD_REMOVAL this | |
795 | * is inversed to maintain historic compatibility. | |
796 | */ | |
797 | ||
798 | static int ds_event(struct pcmcia_socket *skt, event_t event, int priority) | |
799 | { | |
800 | struct pcmcia_bus_socket *s = skt->pcmcia; | |
801 | int ret = 0; | |
802 | ||
803 | ds_dbg(1, "ds_event(0x%06x, %d, 0x%p)\n", | |
804 | event, priority, s); | |
805 | ||
806 | switch (event) { | |
807 | ||
808 | case CS_EVENT_CARD_REMOVAL: | |
809 | s->state &= ~DS_SOCKET_PRESENT; | |
810 | send_event(skt, event, priority); | |
811 | unbind_request(s); | |
812 | handle_event(s, event); | |
813 | break; | |
814 | ||
815 | case CS_EVENT_CARD_INSERTION: | |
816 | s->state |= DS_SOCKET_PRESENT; | |
817 | pcmcia_card_add(skt); | |
818 | handle_event(s, event); | |
819 | break; | |
820 | ||
821 | case CS_EVENT_EJECTION_REQUEST: | |
822 | ret = send_event(skt, event, priority); | |
823 | break; | |
824 | ||
825 | default: | |
826 | handle_event(s, event); | |
827 | send_event(skt, event, priority); | |
828 | break; | |
829 | } | |
830 | ||
831 | return 0; | |
832 | } /* ds_event */ | |
833 | ||
834 | ||
835 | /*====================================================================== | |
836 | ||
837 | bind_request() and bind_device() are merged by now. Register_client() | |
838 | is called right at the end of bind_request(), during the driver's | |
839 | ->attach() call. Individual descriptions: | |
840 | ||
841 | bind_request() connects a socket to a particular client driver. | |
842 | It looks up the specified device ID in the list of registered | |
843 | drivers, binds it to the socket, and tries to create an instance | |
844 | of the device. unbind_request() deletes a driver instance. | |
845 | ||
846 | Bind_device() associates a device driver with a particular socket. | |
847 | It is normally called by Driver Services after it has identified | |
848 | a newly inserted card. An instance of that driver will then be | |
849 | eligible to register as a client of this socket. | |
850 | ||
851 | Register_client() uses the dev_info_t handle to match the | |
852 | caller with a socket. The driver must have already been bound | |
853 | to a socket with bind_device() -- in fact, bind_device() | |
854 | allocates the client structure that will be used. | |
855 | ||
856 | ======================================================================*/ | |
857 | ||
858 | static int bind_request(struct pcmcia_bus_socket *s, bind_info_t *bind_info) | |
859 | { | |
860 | struct pcmcia_driver *p_drv; | |
861 | struct pcmcia_device *p_dev; | |
862 | int ret = 0; | |
863 | unsigned long flags; | |
864 | ||
865 | s = pcmcia_get_bus_socket(s); | |
866 | if (!s) | |
867 | return -EINVAL; | |
868 | ||
869 | ds_dbg(2, "bind_request(%d, '%s')\n", s->parent->sock, | |
870 | (char *)bind_info->dev_info); | |
871 | ||
872 | p_drv = get_pcmcia_driver(&bind_info->dev_info); | |
873 | if (!p_drv) { | |
874 | ret = -EINVAL; | |
875 | goto err_put; | |
876 | } | |
877 | ||
878 | if (!try_module_get(p_drv->owner)) { | |
879 | ret = -EINVAL; | |
880 | goto err_put_driver; | |
881 | } | |
882 | ||
883 | spin_lock_irqsave(&pcmcia_dev_list_lock, flags); | |
884 | list_for_each_entry(p_dev, &s->devices_list, socket_device_list) { | |
885 | if (p_dev->func == bind_info->function) { | |
886 | if ((p_dev->dev.driver == &p_drv->drv)) { | |
887 | if (p_dev->cardmgr) { | |
888 | /* if there's already a device | |
889 | * registered, and it was registered | |
890 | * by userspace before, we need to | |
891 | * return the "instance". */ | |
892 | spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); | |
893 | bind_info->instance = p_dev->instance; | |
894 | ret = -EBUSY; | |
895 | goto err_put_module; | |
896 | } else { | |
897 | /* the correct driver managed to bind | |
898 | * itself magically to the correct | |
899 | * device. */ | |
900 | spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); | |
901 | p_dev->cardmgr = p_drv; | |
902 | ret = 0; | |
903 | goto err_put_module; | |
904 | } | |
905 | } else if (!p_dev->dev.driver) { | |
906 | /* there's already a device available where | |
907 | * no device has been bound to yet. So we don't | |
908 | * need to register a device! */ | |
909 | spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); | |
910 | goto rescan; | |
911 | } | |
912 | } | |
913 | } | |
914 | spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); | |
915 | ||
916 | p_dev = pcmcia_device_add(s, bind_info->function); | |
917 | if (!p_dev) { | |
918 | ret = -EIO; | |
919 | goto err_put_module; | |
920 | } | |
921 | ||
922 | rescan: | |
923 | p_dev->cardmgr = p_drv; | |
924 | ||
925 | pcmcia_device_query(p_dev); | |
926 | ||
927 | /* | |
928 | * Prevent this racing with a card insertion. | |
929 | */ | |
930 | down(&s->parent->skt_sem); | |
931 | bus_rescan_devices(&pcmcia_bus_type); | |
932 | up(&s->parent->skt_sem); | |
933 | ||
934 | /* check whether the driver indeed matched. I don't care if this | |
935 | * is racy or not, because it can only happen on cardmgr access | |
936 | * paths... | |
937 | */ | |
938 | if (!(p_dev->dev.driver == &p_drv->drv)) | |
939 | p_dev->cardmgr = NULL; | |
940 | ||
941 | err_put_module: | |
942 | module_put(p_drv->owner); | |
943 | err_put_driver: | |
944 | put_driver(&p_drv->drv); | |
945 | err_put: | |
946 | pcmcia_put_bus_socket(s); | |
947 | ||
948 | return (ret); | |
949 | } /* bind_request */ | |
950 | ||
951 | ||
952 | int pcmcia_register_client(client_handle_t *handle, client_reg_t *req) | |
953 | { | |
954 | client_t *client = NULL; | |
955 | struct pcmcia_socket *s; | |
956 | struct pcmcia_bus_socket *skt = NULL; | |
957 | struct pcmcia_device *p_dev = NULL; | |
958 | ||
959 | /* Look for unbound client with matching dev_info */ | |
960 | down_read(&pcmcia_socket_list_rwsem); | |
961 | list_for_each_entry(s, &pcmcia_socket_list, socket_list) { | |
962 | unsigned long flags; | |
963 | ||
964 | if (s->state & SOCKET_CARDBUS) | |
965 | continue; | |
966 | ||
967 | skt = s->pcmcia; | |
968 | if (!skt) | |
969 | continue; | |
970 | skt = pcmcia_get_bus_socket(skt); | |
971 | if (!skt) | |
972 | continue; | |
973 | spin_lock_irqsave(&pcmcia_dev_list_lock, flags); | |
974 | list_for_each_entry(p_dev, &skt->devices_list, socket_device_list) { | |
975 | struct pcmcia_driver *p_drv; | |
976 | p_dev = pcmcia_get_dev(p_dev); | |
977 | if (!p_dev) | |
978 | continue; | |
979 | if (!(p_dev->client.state & CLIENT_UNBOUND) || | |
980 | (!p_dev->dev.driver)) { | |
981 | pcmcia_put_dev(p_dev); | |
982 | continue; | |
983 | } | |
984 | p_drv = to_pcmcia_drv(p_dev->dev.driver); | |
985 | if (!strncmp(p_drv->drv.name, (char *)req->dev_info, DEV_NAME_LEN)) { | |
986 | client = &p_dev->client; | |
987 | spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); | |
988 | goto found; | |
989 | } | |
990 | pcmcia_put_dev(p_dev); | |
991 | } | |
992 | spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); | |
993 | pcmcia_put_bus_socket(skt); | |
994 | } | |
995 | found: | |
996 | up_read(&pcmcia_socket_list_rwsem); | |
997 | if (!p_dev || !client) | |
998 | return -ENODEV; | |
999 | ||
1000 | pcmcia_put_bus_socket(skt); /* safe, as we already hold a reference from bind_device */ | |
1001 | ||
1002 | *handle = client; | |
1003 | client->state &= ~CLIENT_UNBOUND; | |
1004 | client->Socket = s; | |
1005 | client->EventMask = req->EventMask; | |
1006 | client->event_handler = req->event_handler; | |
1007 | client->event_callback_args = req->event_callback_args; | |
1008 | client->event_callback_args.client_handle = client; | |
1009 | ||
1010 | if (s->state & SOCKET_CARDBUS) | |
1011 | client->state |= CLIENT_CARDBUS; | |
1012 | ||
1013 | if ((!(s->state & SOCKET_CARDBUS)) && (s->functions == 0) && | |
1014 | (client->Function != BIND_FN_ALL)) { | |
1015 | cistpl_longlink_mfc_t mfc; | |
1016 | if (pccard_read_tuple(s, client->Function, CISTPL_LONGLINK_MFC, &mfc) | |
1017 | == CS_SUCCESS) | |
1018 | s->functions = mfc.nfn; | |
1019 | else | |
1020 | s->functions = 1; | |
1021 | s->config = kmalloc(sizeof(config_t) * s->functions, | |
1022 | GFP_KERNEL); | |
1023 | if (!s->config) | |
1024 | goto out_no_resource; | |
1025 | memset(s->config, 0, sizeof(config_t) * s->functions); | |
1026 | } | |
1027 | ||
1028 | ds_dbg(1, "register_client(): client 0x%p, dev %s\n", | |
1029 | client, p_dev->dev.bus_id); | |
1030 | if (client->EventMask & CS_EVENT_REGISTRATION_COMPLETE) | |
1031 | EVENT(client, CS_EVENT_REGISTRATION_COMPLETE, CS_EVENT_PRI_LOW); | |
1032 | ||
1033 | if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) { | |
1034 | if (client->EventMask & CS_EVENT_CARD_INSERTION) | |
1035 | EVENT(client, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
1036 | } | |
1037 | ||
1038 | return CS_SUCCESS; | |
1039 | ||
1040 | out_no_resource: | |
1041 | pcmcia_put_dev(p_dev); | |
1042 | return CS_OUT_OF_RESOURCE; | |
1043 | } /* register_client */ | |
1044 | EXPORT_SYMBOL(pcmcia_register_client); | |
1045 | ||
1046 | ||
1047 | /*====================================================================*/ | |
1048 | ||
1049 | extern struct pci_bus *pcmcia_lookup_bus(struct pcmcia_socket *s); | |
1050 | ||
1051 | static int get_device_info(struct pcmcia_bus_socket *s, bind_info_t *bind_info, int first) | |
1052 | { | |
1053 | dev_node_t *node; | |
1054 | struct pcmcia_device *p_dev; | |
1055 | unsigned long flags; | |
1056 | int ret = 0; | |
1057 | ||
1058 | #ifdef CONFIG_CARDBUS | |
1059 | /* | |
1060 | * Some unbelievably ugly code to associate the PCI cardbus | |
1061 | * device and its driver with the PCMCIA "bind" information. | |
1062 | */ | |
1063 | { | |
1064 | struct pci_bus *bus; | |
1065 | ||
1066 | bus = pcmcia_lookup_bus(s->parent); | |
1067 | if (bus) { | |
1068 | struct list_head *list; | |
1069 | struct pci_dev *dev = NULL; | |
1070 | ||
1071 | list = bus->devices.next; | |
1072 | while (list != &bus->devices) { | |
1073 | struct pci_dev *pdev = pci_dev_b(list); | |
1074 | list = list->next; | |
1075 | ||
1076 | if (first) { | |
1077 | dev = pdev; | |
1078 | break; | |
1079 | } | |
1080 | ||
1081 | /* Try to handle "next" here some way? */ | |
1082 | } | |
1083 | if (dev && dev->driver) { | |
1084 | strlcpy(bind_info->name, dev->driver->name, DEV_NAME_LEN); | |
1085 | bind_info->major = 0; | |
1086 | bind_info->minor = 0; | |
1087 | bind_info->next = NULL; | |
1088 | return 0; | |
1089 | } | |
1090 | } | |
1091 | } | |
1092 | #endif | |
1093 | ||
1094 | spin_lock_irqsave(&pcmcia_dev_list_lock, flags); | |
1095 | list_for_each_entry(p_dev, &s->devices_list, socket_device_list) { | |
1096 | if (p_dev->func == bind_info->function) { | |
1097 | p_dev = pcmcia_get_dev(p_dev); | |
1098 | if (!p_dev) | |
1099 | continue; | |
1100 | goto found; | |
1101 | } | |
1102 | } | |
1103 | spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); | |
1104 | return -ENODEV; | |
1105 | ||
1106 | found: | |
1107 | spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); | |
1108 | ||
1109 | if ((!p_dev->instance) || | |
1110 | (p_dev->instance->state & DEV_CONFIG_PENDING)) { | |
1111 | ret = -EAGAIN; | |
1112 | goto err_put; | |
1113 | } | |
1114 | ||
1115 | if (first) | |
1116 | node = p_dev->instance->dev; | |
1117 | else | |
1118 | for (node = p_dev->instance->dev; node; node = node->next) | |
1119 | if (node == bind_info->next) | |
1120 | break; | |
1121 | if (!node) { | |
1122 | ret = -ENODEV; | |
1123 | goto err_put; | |
1124 | } | |
1125 | ||
1126 | strlcpy(bind_info->name, node->dev_name, DEV_NAME_LEN); | |
1127 | bind_info->major = node->major; | |
1128 | bind_info->minor = node->minor; | |
1129 | bind_info->next = node->next; | |
1130 | ||
1131 | err_put: | |
1132 | pcmcia_put_dev(p_dev); | |
1133 | return (ret); | |
1134 | } /* get_device_info */ | |
1135 | ||
1136 | /*====================================================================*/ | |
1137 | ||
1138 | /* unbind _all_ devices attached to a given pcmcia_bus_socket. The | |
1139 | * drivers have been called with EVENT_CARD_REMOVAL before. | |
1140 | */ | |
1141 | static int unbind_request(struct pcmcia_bus_socket *s) | |
1142 | { | |
1143 | struct pcmcia_device *p_dev; | |
1144 | unsigned long flags; | |
1145 | ||
1146 | ds_dbg(2, "unbind_request(%d)\n", s->parent->sock); | |
1147 | ||
1148 | s->device_count = 0; | |
1149 | ||
1150 | for (;;) { | |
1151 | /* unregister all pcmcia_devices registered with this socket*/ | |
1152 | spin_lock_irqsave(&pcmcia_dev_list_lock, flags); | |
1153 | if (list_empty(&s->devices_list)) { | |
1154 | spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); | |
1155 | return 0; | |
1156 | } | |
1157 | p_dev = list_entry((&s->devices_list)->next, struct pcmcia_device, socket_device_list); | |
1158 | list_del(&p_dev->socket_device_list); | |
1159 | p_dev->client.state |= CLIENT_STALE; | |
1160 | spin_unlock_irqrestore(&pcmcia_dev_list_lock, flags); | |
1161 | ||
1162 | device_unregister(&p_dev->dev); | |
1163 | } | |
1164 | ||
1165 | return 0; | |
1166 | } /* unbind_request */ | |
1167 | ||
1168 | int pcmcia_deregister_client(client_handle_t handle) | |
1169 | { | |
1170 | struct pcmcia_socket *s; | |
1171 | int i; | |
1172 | struct pcmcia_device *p_dev = handle_to_pdev(handle); | |
1173 | ||
1174 | if (CHECK_HANDLE(handle)) | |
1175 | return CS_BAD_HANDLE; | |
1176 | ||
1177 | s = SOCKET(handle); | |
1178 | ds_dbg(1, "deregister_client(%p)\n", handle); | |
1179 | ||
1180 | if (handle->state & (CLIENT_IRQ_REQ|CLIENT_IO_REQ|CLIENT_CONFIG_LOCKED)) | |
1181 | goto warn_out; | |
1182 | for (i = 0; i < MAX_WIN; i++) | |
1183 | if (handle->state & CLIENT_WIN_REQ(i)) | |
1184 | goto warn_out; | |
1185 | ||
1186 | if (handle->state & CLIENT_STALE) { | |
1187 | handle->client_magic = 0; | |
1188 | handle->state &= ~CLIENT_STALE; | |
1189 | pcmcia_put_dev(p_dev); | |
1190 | } else { | |
1191 | handle->state = CLIENT_UNBOUND; | |
1192 | handle->event_handler = NULL; | |
1193 | } | |
1194 | ||
1195 | return CS_SUCCESS; | |
1196 | warn_out: | |
1197 | printk(KERN_WARNING "ds: deregister_client was called too early.\n"); | |
1198 | return CS_IN_USE; | |
1199 | } /* deregister_client */ | |
1200 | EXPORT_SYMBOL(pcmcia_deregister_client); | |
1201 | ||
1202 | ||
1203 | /*====================================================================== | |
1204 | ||
1205 | The user-mode PC Card device interface | |
1206 | ||
1207 | ======================================================================*/ | |
1208 | ||
1209 | static int ds_open(struct inode *inode, struct file *file) | |
1210 | { | |
1211 | socket_t i = iminor(inode); | |
1212 | struct pcmcia_bus_socket *s; | |
1213 | user_info_t *user; | |
1214 | ||
1215 | ds_dbg(0, "ds_open(socket %d)\n", i); | |
1216 | ||
1217 | s = get_socket_info_by_nr(i); | |
1218 | if (!s) | |
1219 | return -ENODEV; | |
1220 | s = pcmcia_get_bus_socket(s); | |
1221 | if (!s) | |
1222 | return -ENODEV; | |
1223 | ||
1224 | if ((file->f_flags & O_ACCMODE) != O_RDONLY) { | |
1225 | if (s->state & DS_SOCKET_BUSY) { | |
1226 | pcmcia_put_bus_socket(s); | |
1227 | return -EBUSY; | |
1228 | } | |
1229 | else | |
1230 | s->state |= DS_SOCKET_BUSY; | |
1231 | } | |
1232 | ||
1233 | user = kmalloc(sizeof(user_info_t), GFP_KERNEL); | |
1234 | if (!user) { | |
1235 | pcmcia_put_bus_socket(s); | |
1236 | return -ENOMEM; | |
1237 | } | |
1238 | user->event_tail = user->event_head = 0; | |
1239 | user->next = s->user; | |
1240 | user->user_magic = USER_MAGIC; | |
1241 | user->socket = s; | |
1242 | s->user = user; | |
1243 | file->private_data = user; | |
1244 | ||
1245 | if (s->state & DS_SOCKET_PRESENT) | |
1246 | queue_event(user, CS_EVENT_CARD_INSERTION); | |
1247 | return 0; | |
1248 | } /* ds_open */ | |
1249 | ||
1250 | /*====================================================================*/ | |
1251 | ||
1252 | static int ds_release(struct inode *inode, struct file *file) | |
1253 | { | |
1254 | struct pcmcia_bus_socket *s; | |
1255 | user_info_t *user, **link; | |
1256 | ||
1257 | ds_dbg(0, "ds_release(socket %d)\n", iminor(inode)); | |
1258 | ||
1259 | user = file->private_data; | |
1260 | if (CHECK_USER(user)) | |
1261 | goto out; | |
1262 | ||
1263 | s = user->socket; | |
1264 | ||
1265 | /* Unlink user data structure */ | |
1266 | if ((file->f_flags & O_ACCMODE) != O_RDONLY) { | |
1267 | s->state &= ~DS_SOCKET_BUSY; | |
1268 | } | |
1269 | file->private_data = NULL; | |
1270 | for (link = &s->user; *link; link = &(*link)->next) | |
1271 | if (*link == user) break; | |
1272 | if (link == NULL) | |
1273 | goto out; | |
1274 | *link = user->next; | |
1275 | user->user_magic = 0; | |
1276 | kfree(user); | |
1277 | pcmcia_put_bus_socket(s); | |
1278 | out: | |
1279 | return 0; | |
1280 | } /* ds_release */ | |
1281 | ||
1282 | /*====================================================================*/ | |
1283 | ||
1284 | static ssize_t ds_read(struct file *file, char __user *buf, | |
1285 | size_t count, loff_t *ppos) | |
1286 | { | |
1287 | struct pcmcia_bus_socket *s; | |
1288 | user_info_t *user; | |
1289 | int ret; | |
1290 | ||
1291 | ds_dbg(2, "ds_read(socket %d)\n", iminor(file->f_dentry->d_inode)); | |
1292 | ||
1293 | if (count < 4) | |
1294 | return -EINVAL; | |
1295 | ||
1296 | user = file->private_data; | |
1297 | if (CHECK_USER(user)) | |
1298 | return -EIO; | |
1299 | ||
1300 | s = user->socket; | |
1301 | if (s->state & DS_SOCKET_DEAD) | |
1302 | return -EIO; | |
1303 | ||
1304 | ret = wait_event_interruptible(s->queue, !queue_empty(user)); | |
1305 | if (ret == 0) | |
1306 | ret = put_user(get_queued_event(user), (int __user *)buf) ? -EFAULT : 4; | |
1307 | ||
1308 | return ret; | |
1309 | } /* ds_read */ | |
1310 | ||
1311 | /*====================================================================*/ | |
1312 | ||
1313 | static ssize_t ds_write(struct file *file, const char __user *buf, | |
1314 | size_t count, loff_t *ppos) | |
1315 | { | |
1316 | ds_dbg(2, "ds_write(socket %d)\n", iminor(file->f_dentry->d_inode)); | |
1317 | ||
1318 | if (count != 4) | |
1319 | return -EINVAL; | |
1320 | if ((file->f_flags & O_ACCMODE) == O_RDONLY) | |
1321 | return -EBADF; | |
1322 | ||
1323 | return -EIO; | |
1324 | } /* ds_write */ | |
1325 | ||
1326 | /*====================================================================*/ | |
1327 | ||
1328 | /* No kernel lock - fine */ | |
1329 | static u_int ds_poll(struct file *file, poll_table *wait) | |
1330 | { | |
1331 | struct pcmcia_bus_socket *s; | |
1332 | user_info_t *user; | |
1333 | ||
1334 | ds_dbg(2, "ds_poll(socket %d)\n", iminor(file->f_dentry->d_inode)); | |
1335 | ||
1336 | user = file->private_data; | |
1337 | if (CHECK_USER(user)) | |
1338 | return POLLERR; | |
1339 | s = user->socket; | |
1340 | /* | |
1341 | * We don't check for a dead socket here since that | |
1342 | * will send cardmgr into an endless spin. | |
1343 | */ | |
1344 | poll_wait(file, &s->queue, wait); | |
1345 | if (!queue_empty(user)) | |
1346 | return POLLIN | POLLRDNORM; | |
1347 | return 0; | |
1348 | } /* ds_poll */ | |
1349 | ||
1350 | /*====================================================================*/ | |
1351 | ||
1352 | extern int pcmcia_adjust_resource_info(adjust_t *adj); | |
1353 | ||
1354 | static int ds_ioctl(struct inode * inode, struct file * file, | |
1355 | u_int cmd, u_long arg) | |
1356 | { | |
1357 | struct pcmcia_bus_socket *s; | |
1358 | void __user *uarg = (char __user *)arg; | |
1359 | u_int size; | |
1360 | int ret, err; | |
1361 | ds_ioctl_arg_t *buf; | |
1362 | user_info_t *user; | |
1363 | ||
1364 | ds_dbg(2, "ds_ioctl(socket %d, %#x, %#lx)\n", iminor(inode), cmd, arg); | |
1365 | ||
1366 | user = file->private_data; | |
1367 | if (CHECK_USER(user)) | |
1368 | return -EIO; | |
1369 | ||
1370 | s = user->socket; | |
1371 | if (s->state & DS_SOCKET_DEAD) | |
1372 | return -EIO; | |
1373 | ||
1374 | size = (cmd & IOCSIZE_MASK) >> IOCSIZE_SHIFT; | |
1375 | if (size > sizeof(ds_ioctl_arg_t)) return -EINVAL; | |
1376 | ||
1377 | /* Permission check */ | |
1378 | if (!(cmd & IOC_OUT) && !capable(CAP_SYS_ADMIN)) | |
1379 | return -EPERM; | |
1380 | ||
1381 | if (cmd & IOC_IN) { | |
1382 | if (!access_ok(VERIFY_READ, uarg, size)) { | |
1383 | ds_dbg(3, "ds_ioctl(): verify_read = %d\n", -EFAULT); | |
1384 | return -EFAULT; | |
1385 | } | |
1386 | } | |
1387 | if (cmd & IOC_OUT) { | |
1388 | if (!access_ok(VERIFY_WRITE, uarg, size)) { | |
1389 | ds_dbg(3, "ds_ioctl(): verify_write = %d\n", -EFAULT); | |
1390 | return -EFAULT; | |
1391 | } | |
1392 | } | |
1393 | buf = kmalloc(sizeof(ds_ioctl_arg_t), GFP_KERNEL); | |
1394 | if (!buf) | |
1395 | return -ENOMEM; | |
1396 | ||
1397 | err = ret = 0; | |
1398 | ||
1399 | if (cmd & IOC_IN) __copy_from_user((char *)buf, uarg, size); | |
1400 | ||
1401 | switch (cmd) { | |
1402 | case DS_ADJUST_RESOURCE_INFO: | |
1403 | ret = pcmcia_adjust_resource_info(&buf->adjust); | |
1404 | break; | |
1405 | case DS_GET_CARD_SERVICES_INFO: | |
1406 | ret = pcmcia_get_card_services_info(&buf->servinfo); | |
1407 | break; | |
1408 | case DS_GET_CONFIGURATION_INFO: | |
1409 | if (buf->config.Function && | |
1410 | (buf->config.Function >= s->parent->functions)) | |
1411 | ret = CS_BAD_ARGS; | |
1412 | else | |
1413 | ret = pccard_get_configuration_info(s->parent, | |
1414 | buf->config.Function, &buf->config); | |
1415 | break; | |
1416 | case DS_GET_FIRST_TUPLE: | |
1417 | down(&s->parent->skt_sem); | |
1418 | pcmcia_validate_mem(s->parent); | |
1419 | up(&s->parent->skt_sem); | |
1420 | ret = pccard_get_first_tuple(s->parent, BIND_FN_ALL, &buf->tuple); | |
1421 | break; | |
1422 | case DS_GET_NEXT_TUPLE: | |
1423 | ret = pccard_get_next_tuple(s->parent, BIND_FN_ALL, &buf->tuple); | |
1424 | break; | |
1425 | case DS_GET_TUPLE_DATA: | |
1426 | buf->tuple.TupleData = buf->tuple_parse.data; | |
1427 | buf->tuple.TupleDataMax = sizeof(buf->tuple_parse.data); | |
1428 | ret = pccard_get_tuple_data(s->parent, &buf->tuple); | |
1429 | break; | |
1430 | case DS_PARSE_TUPLE: | |
1431 | buf->tuple.TupleData = buf->tuple_parse.data; | |
1432 | ret = pccard_parse_tuple(&buf->tuple, &buf->tuple_parse.parse); | |
1433 | break; | |
1434 | case DS_RESET_CARD: | |
1435 | ret = pccard_reset_card(s->parent); | |
1436 | break; | |
1437 | case DS_GET_STATUS: | |
1438 | if (buf->status.Function && | |
1439 | (buf->status.Function >= s->parent->functions)) | |
1440 | ret = CS_BAD_ARGS; | |
1441 | else | |
1442 | ret = pccard_get_status(s->parent, buf->status.Function, &buf->status); | |
1443 | break; | |
1444 | case DS_VALIDATE_CIS: | |
1445 | down(&s->parent->skt_sem); | |
1446 | pcmcia_validate_mem(s->parent); | |
1447 | up(&s->parent->skt_sem); | |
1448 | ret = pccard_validate_cis(s->parent, BIND_FN_ALL, &buf->cisinfo); | |
1449 | break; | |
1450 | case DS_SUSPEND_CARD: | |
1451 | ret = pcmcia_suspend_card(s->parent); | |
1452 | break; | |
1453 | case DS_RESUME_CARD: | |
1454 | ret = pcmcia_resume_card(s->parent); | |
1455 | break; | |
1456 | case DS_EJECT_CARD: | |
1457 | err = pcmcia_eject_card(s->parent); | |
1458 | break; | |
1459 | case DS_INSERT_CARD: | |
1460 | err = pcmcia_insert_card(s->parent); | |
1461 | break; | |
1462 | case DS_ACCESS_CONFIGURATION_REGISTER: | |
1463 | if ((buf->conf_reg.Action == CS_WRITE) && !capable(CAP_SYS_ADMIN)) { | |
1464 | err = -EPERM; | |
1465 | goto free_out; | |
1466 | } | |
1467 | if (buf->conf_reg.Function && | |
1468 | (buf->conf_reg.Function >= s->parent->functions)) | |
1469 | ret = CS_BAD_ARGS; | |
1470 | else | |
1471 | ret = pccard_access_configuration_register(s->parent, | |
1472 | buf->conf_reg.Function, &buf->conf_reg); | |
1473 | break; | |
1474 | case DS_GET_FIRST_REGION: | |
1475 | case DS_GET_NEXT_REGION: | |
1476 | case DS_BIND_MTD: | |
1477 | if (!capable(CAP_SYS_ADMIN)) { | |
1478 | err = -EPERM; | |
1479 | goto free_out; | |
1480 | } else { | |
1481 | static int printed = 0; | |
1482 | if (!printed) { | |
1483 | printk(KERN_WARNING "2.6. kernels use pcmciamtd instead of memory_cs.c and do not require special\n"); | |
1484 | printk(KERN_WARNING "MTD handling any more.\n"); | |
1485 | printed++; | |
1486 | } | |
1487 | } | |
1488 | err = -EINVAL; | |
1489 | goto free_out; | |
1490 | break; | |
1491 | case DS_GET_FIRST_WINDOW: | |
1492 | ret = pcmcia_get_window(s->parent, &buf->win_info.handle, 0, | |
1493 | &buf->win_info.window); | |
1494 | break; | |
1495 | case DS_GET_NEXT_WINDOW: | |
1496 | ret = pcmcia_get_window(s->parent, &buf->win_info.handle, | |
1497 | buf->win_info.handle->index + 1, &buf->win_info.window); | |
1498 | break; | |
1499 | case DS_GET_MEM_PAGE: | |
1500 | ret = pcmcia_get_mem_page(buf->win_info.handle, | |
1501 | &buf->win_info.map); | |
1502 | break; | |
1503 | case DS_REPLACE_CIS: | |
1504 | ret = pcmcia_replace_cis(s->parent, &buf->cisdump); | |
1505 | break; | |
1506 | case DS_BIND_REQUEST: | |
1507 | if (!capable(CAP_SYS_ADMIN)) { | |
1508 | err = -EPERM; | |
1509 | goto free_out; | |
1510 | } | |
1511 | err = bind_request(s, &buf->bind_info); | |
1512 | break; | |
1513 | case DS_GET_DEVICE_INFO: | |
1514 | err = get_device_info(s, &buf->bind_info, 1); | |
1515 | break; | |
1516 | case DS_GET_NEXT_DEVICE: | |
1517 | err = get_device_info(s, &buf->bind_info, 0); | |
1518 | break; | |
1519 | case DS_UNBIND_REQUEST: | |
1520 | err = 0; | |
1521 | break; | |
1522 | default: | |
1523 | err = -EINVAL; | |
1524 | } | |
1525 | ||
1526 | if ((err == 0) && (ret != CS_SUCCESS)) { | |
1527 | ds_dbg(2, "ds_ioctl: ret = %d\n", ret); | |
1528 | switch (ret) { | |
1529 | case CS_BAD_SOCKET: case CS_NO_CARD: | |
1530 | err = -ENODEV; break; | |
1531 | case CS_BAD_ARGS: case CS_BAD_ATTRIBUTE: case CS_BAD_IRQ: | |
1532 | case CS_BAD_TUPLE: | |
1533 | err = -EINVAL; break; | |
1534 | case CS_IN_USE: | |
1535 | err = -EBUSY; break; | |
1536 | case CS_OUT_OF_RESOURCE: | |
1537 | err = -ENOSPC; break; | |
1538 | case CS_NO_MORE_ITEMS: | |
1539 | err = -ENODATA; break; | |
1540 | case CS_UNSUPPORTED_FUNCTION: | |
1541 | err = -ENOSYS; break; | |
1542 | default: | |
1543 | err = -EIO; break; | |
1544 | } | |
1545 | } | |
1546 | ||
1547 | if (cmd & IOC_OUT) { | |
1548 | if (__copy_to_user(uarg, (char *)buf, size)) | |
1549 | err = -EFAULT; | |
1550 | } | |
1551 | ||
1552 | free_out: | |
1553 | kfree(buf); | |
1554 | return err; | |
1555 | } /* ds_ioctl */ | |
1556 | ||
1557 | /*====================================================================*/ | |
1558 | ||
1559 | static struct file_operations ds_fops = { | |
1560 | .owner = THIS_MODULE, | |
1561 | .open = ds_open, | |
1562 | .release = ds_release, | |
1563 | .ioctl = ds_ioctl, | |
1564 | .read = ds_read, | |
1565 | .write = ds_write, | |
1566 | .poll = ds_poll, | |
1567 | }; | |
1568 | ||
1569 | static int __devinit pcmcia_bus_add_socket(struct class_device *class_dev) | |
1570 | { | |
1571 | struct pcmcia_socket *socket = class_get_devdata(class_dev); | |
1572 | struct pcmcia_bus_socket *s; | |
1573 | int ret; | |
1574 | ||
1575 | s = kmalloc(sizeof(struct pcmcia_bus_socket), GFP_KERNEL); | |
1576 | if(!s) | |
1577 | return -ENOMEM; | |
1578 | memset(s, 0, sizeof(struct pcmcia_bus_socket)); | |
1579 | ||
1580 | /* get reference to parent socket */ | |
1581 | s->parent = pcmcia_get_socket(socket); | |
1582 | if (!s->parent) { | |
1583 | printk(KERN_ERR "PCMCIA obtaining reference to socket %p failed\n", socket); | |
1584 | kfree (s); | |
1585 | return -ENODEV; | |
1586 | } | |
1587 | ||
1588 | kref_init(&s->refcount); | |
1589 | ||
1590 | /* | |
1591 | * Ugly. But we want to wait for the socket threads to have started up. | |
1592 | * We really should let the drivers themselves drive some of this.. | |
1593 | */ | |
1594 | msleep(250); | |
1595 | ||
1596 | init_waitqueue_head(&s->queue); | |
1597 | INIT_LIST_HEAD(&s->devices_list); | |
1598 | ||
1599 | /* Set up hotline to Card Services */ | |
1600 | s->callback.owner = THIS_MODULE; | |
1601 | s->callback.event = &ds_event; | |
1602 | s->callback.resources_done = &pcmcia_card_add; | |
1603 | socket->pcmcia = s; | |
1604 | ||
1605 | ret = pccard_register_pcmcia(socket, &s->callback); | |
1606 | if (ret) { | |
1607 | printk(KERN_ERR "PCMCIA registration PCCard core failed for socket %p\n", socket); | |
1608 | pcmcia_put_bus_socket(s); | |
1609 | socket->pcmcia = NULL; | |
1610 | return (ret); | |
1611 | } | |
1612 | ||
1613 | return 0; | |
1614 | } | |
1615 | ||
1616 | ||
1617 | static void pcmcia_bus_remove_socket(struct class_device *class_dev) | |
1618 | { | |
1619 | struct pcmcia_socket *socket = class_get_devdata(class_dev); | |
1620 | ||
1621 | if (!socket || !socket->pcmcia) | |
1622 | return; | |
1623 | ||
1624 | pccard_register_pcmcia(socket, NULL); | |
1625 | ||
1626 | socket->pcmcia->state |= DS_SOCKET_DEAD; | |
1627 | pcmcia_put_bus_socket(socket->pcmcia); | |
1628 | socket->pcmcia = NULL; | |
1629 | ||
1630 | return; | |
1631 | } | |
1632 | ||
1633 | ||
1634 | /* the pcmcia_bus_interface is used to handle pcmcia socket devices */ | |
1635 | static struct class_interface pcmcia_bus_interface = { | |
1636 | .class = &pcmcia_socket_class, | |
1637 | .add = &pcmcia_bus_add_socket, | |
1638 | .remove = &pcmcia_bus_remove_socket, | |
1639 | }; | |
1640 | ||
1641 | ||
1642 | struct bus_type pcmcia_bus_type = { | |
1643 | .name = "pcmcia", | |
840c2ac5 | 1644 | .hotplug = pcmcia_bus_hotplug, |
1da177e4 LT |
1645 | .match = pcmcia_bus_match, |
1646 | .dev_attrs = pcmcia_dev_attrs, | |
1647 | }; | |
1648 | EXPORT_SYMBOL(pcmcia_bus_type); | |
1649 | ||
1650 | ||
1651 | static int __init init_pcmcia_bus(void) | |
1652 | { | |
1653 | int i; | |
1654 | ||
1655 | spin_lock_init(&pcmcia_dev_list_lock); | |
1656 | ||
1657 | bus_register(&pcmcia_bus_type); | |
1658 | class_interface_register(&pcmcia_bus_interface); | |
1659 | ||
1660 | /* Set up character device for user mode clients */ | |
1661 | i = register_chrdev(0, "pcmcia", &ds_fops); | |
afbf510d | 1662 | if (i < 0) |
1da177e4 | 1663 | printk(KERN_NOTICE "unable to find a free device # for " |
afbf510d | 1664 | "Driver Services (error=%d)\n", i); |
1da177e4 LT |
1665 | else |
1666 | major_dev = i; | |
1667 | ||
1668 | #ifdef CONFIG_PROC_FS | |
1669 | proc_pccard = proc_mkdir("pccard", proc_bus); | |
1670 | if (proc_pccard) | |
1671 | create_proc_read_entry("drivers",0,proc_pccard,proc_read_drivers,NULL); | |
1672 | #endif | |
1673 | ||
1674 | return 0; | |
1675 | } | |
1676 | fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that | |
1677 | * pcmcia_socket_class is already registered */ | |
1678 | ||
1679 | ||
1680 | static void __exit exit_pcmcia_bus(void) | |
1681 | { | |
1682 | class_interface_unregister(&pcmcia_bus_interface); | |
1683 | ||
1684 | #ifdef CONFIG_PROC_FS | |
1685 | if (proc_pccard) { | |
1686 | remove_proc_entry("drivers", proc_pccard); | |
1687 | remove_proc_entry("pccard", proc_bus); | |
1688 | } | |
1689 | #endif | |
1690 | if (major_dev != -1) | |
1691 | unregister_chrdev(major_dev, "pcmcia"); | |
1692 | ||
1693 | bus_unregister(&pcmcia_bus_type); | |
1694 | } | |
1695 | module_exit(exit_pcmcia_bus); | |
1696 | ||
1697 | ||
1698 | ||
1699 | /* helpers for backwards-compatible functions */ | |
1700 | ||
1701 | static struct pcmcia_bus_socket * get_socket_info_by_nr(unsigned int nr) | |
1702 | { | |
1703 | struct pcmcia_socket * s = pcmcia_get_socket_by_nr(nr); | |
1704 | if (s && s->pcmcia) | |
1705 | return s->pcmcia; | |
1706 | else | |
1707 | return NULL; | |
1708 | } | |
1709 | ||
1710 | /* backwards-compatible accessing of driver --- by name! */ | |
1711 | ||
1712 | static struct pcmcia_driver * get_pcmcia_driver (dev_info_t *dev_info) | |
1713 | { | |
1714 | struct device_driver *drv; | |
1715 | struct pcmcia_driver *p_drv; | |
1716 | ||
1717 | drv = driver_find((char *) dev_info, &pcmcia_bus_type); | |
1718 | if (!drv) | |
1719 | return NULL; | |
1720 | ||
1721 | p_drv = container_of(drv, struct pcmcia_driver, drv); | |
1722 | ||
1723 | return (p_drv); | |
1724 | } | |
1725 | ||
1726 | MODULE_ALIAS("ds"); |