1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * ds.c -- 16-bit PCMCIA core support |
4 | * |
5 | * The initial developer of the original code is David A. Hinds |
6 | * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds |
7 | * are Copyright (C) 1999 David A. Hinds. All Rights Reserved. |
8 | * |
9 | * (C) 1999 David A. Hinds |
10 | * (C) 2003 - 2010 Dominik Brodowski |
11 | */ |
12 | |
13 | #include <linux/kernel.h> |
14 | #include <linux/module.h> |
15 | #include <linux/init.h> |
16 | #include <linux/errno.h> |
17 | #include <linux/list.h> |
18 | #include <linux/delay.h> |
19 | #include <linux/workqueue.h> |
20 | #include <linux/crc32.h> |
21 | #include <linux/firmware.h> |
22 | #include <linux/kref.h> |
23 | #include <linux/dma-mapping.h> |
24 | #include <linux/slab.h> |
25 | |
26 | #include <pcmcia/cistpl.h> |
27 | #include <pcmcia/ds.h> |
28 | #include <pcmcia/ss.h> |
29 | |
30 | #include "cs_internal.h" |
31 | |
32 | /*====================================================================*/ |
33 | |
34 | /* Module parameters */ |
35 | |
36 | MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>" ); |
37 | MODULE_DESCRIPTION("PCMCIA Driver Services" ); |
38 | MODULE_LICENSE("GPL" ); |
39 | |
40 | |
41 | /*====================================================================*/ |
42 | |
43 | static void pcmcia_check_driver(struct pcmcia_driver *p_drv) |
44 | { |
45 | const struct pcmcia_device_id *did = p_drv->id_table; |
46 | unsigned int i; |
47 | u32 hash; |
48 | |
49 | if (!p_drv->probe || !p_drv->remove) |
50 | printk(KERN_DEBUG "pcmcia: %s lacks a requisite callback " |
51 | "function\n" , p_drv->name); |
52 | |
53 | while (did && did->match_flags) { |
54 | for (i = 0; i < 4; i++) { |
55 | if (!did->prod_id[i]) |
56 | continue; |
57 | |
58 | hash = crc32(0, did->prod_id[i], strlen(did->prod_id[i])); |
59 | if (hash == did->prod_id_hash[i]) |
60 | continue; |
61 | |
62 | printk(KERN_DEBUG "pcmcia: %s: invalid hash for " |
63 | "product string \"%s\": is 0x%x, should " |
64 | "be 0x%x\n" , p_drv->name, did->prod_id[i], |
65 | did->prod_id_hash[i], hash); |
66 | printk(KERN_DEBUG "pcmcia: see " |
67 | "Documentation/pcmcia/devicetable.rst for " |
68 | "details\n" ); |
69 | } |
70 | did++; |
71 | } |
72 | |
73 | return; |
74 | } |
75 | |
76 | |
77 | /*======================================================================*/ |
78 | |
79 | |
80 | struct pcmcia_dynid { |
81 | struct list_head node; |
82 | struct pcmcia_device_id id; |
83 | }; |
84 | |
85 | /** |
86 | * new_id_store() - add a new PCMCIA device ID to this driver and re-probe devices |
87 | * @driver: target device driver |
88 | * @buf: buffer for scanning device ID data |
89 | * @count: input size |
90 | * |
91 | * Adds a new dynamic PCMCIA device ID to this driver, |
92 | * and causes the driver to probe for all devices again. |
93 | */ |
94 | static ssize_t |
95 | new_id_store(struct device_driver *driver, const char *buf, size_t count) |
96 | { |
97 | struct pcmcia_dynid *dynid; |
98 | struct pcmcia_driver *pdrv = to_pcmcia_drv(driver); |
99 | __u16 match_flags, manf_id, card_id; |
100 | __u8 func_id, function, device_no; |
101 | __u32 prod_id_hash[4] = {0, 0, 0, 0}; |
102 | int fields = 0; |
103 | int retval = 0; |
104 | |
105 | fields = sscanf(buf, "%hx %hx %hx %hhx %hhx %hhx %x %x %x %x" , |
106 | &match_flags, &manf_id, &card_id, &func_id, &function, &device_no, |
107 | &prod_id_hash[0], &prod_id_hash[1], &prod_id_hash[2], &prod_id_hash[3]); |
108 | if (fields < 6) |
109 | return -EINVAL; |
110 | |
111 | dynid = kzalloc(size: sizeof(struct pcmcia_dynid), GFP_KERNEL); |
112 | if (!dynid) |
113 | return -ENOMEM; |
114 | |
115 | dynid->id.match_flags = match_flags; |
116 | dynid->id.manf_id = manf_id; |
117 | dynid->id.card_id = card_id; |
118 | dynid->id.func_id = func_id; |
119 | dynid->id.function = function; |
120 | dynid->id.device_no = device_no; |
121 | memcpy(dynid->id.prod_id_hash, prod_id_hash, sizeof(__u32) * 4); |
122 | |
123 | mutex_lock(&pdrv->dynids.lock); |
124 | list_add_tail(new: &dynid->node, head: &pdrv->dynids.list); |
125 | mutex_unlock(lock: &pdrv->dynids.lock); |
126 | |
127 | retval = driver_attach(drv: &pdrv->drv); |
128 | |
129 | if (retval) |
130 | return retval; |
131 | return count; |
132 | } |
133 | static DRIVER_ATTR_WO(new_id); |
134 | |
135 | static void |
136 | pcmcia_free_dynids(struct pcmcia_driver *drv) |
137 | { |
138 | struct pcmcia_dynid *dynid, *n; |
139 | |
140 | mutex_lock(&drv->dynids.lock); |
141 | list_for_each_entry_safe(dynid, n, &drv->dynids.list, node) { |
142 | list_del(entry: &dynid->node); |
143 | kfree(objp: dynid); |
144 | } |
145 | mutex_unlock(lock: &drv->dynids.lock); |
146 | } |
147 | |
148 | static int |
149 | pcmcia_create_newid_file(struct pcmcia_driver *drv) |
150 | { |
151 | int error = 0; |
152 | if (drv->probe != NULL) |
153 | error = driver_create_file(driver: &drv->drv, attr: &driver_attr_new_id); |
154 | return error; |
155 | } |
156 | |
157 | static void |
158 | pcmcia_remove_newid_file(struct pcmcia_driver *drv) |
159 | { |
160 | driver_remove_file(driver: &drv->drv, attr: &driver_attr_new_id); |
161 | } |
162 | |
163 | /** |
164 | * pcmcia_register_driver - register a PCMCIA driver with the bus core |
165 | * @driver: the &driver being registered |
166 | * |
167 | * Registers a PCMCIA driver with the PCMCIA bus core. |
168 | */ |
169 | int pcmcia_register_driver(struct pcmcia_driver *driver) |
170 | { |
171 | int error; |
172 | |
173 | if (!driver) |
174 | return -EINVAL; |
175 | |
176 | pcmcia_check_driver(p_drv: driver); |
177 | |
178 | /* initialize common fields */ |
179 | driver->drv.bus = &pcmcia_bus_type; |
180 | driver->drv.owner = driver->owner; |
181 | driver->drv.name = driver->name; |
182 | mutex_init(&driver->dynids.lock); |
183 | INIT_LIST_HEAD(list: &driver->dynids.list); |
184 | |
185 | pr_debug("registering driver %s\n" , driver->name); |
186 | |
187 | error = driver_register(drv: &driver->drv); |
188 | if (error < 0) |
189 | return error; |
190 | |
191 | error = pcmcia_create_newid_file(drv: driver); |
192 | if (error) |
193 | driver_unregister(drv: &driver->drv); |
194 | |
195 | return error; |
196 | } |
197 | EXPORT_SYMBOL(pcmcia_register_driver); |
198 | |
199 | /** |
200 | * pcmcia_unregister_driver - unregister a PCMCIA driver with the bus core |
201 | * @driver: the &driver being unregistered |
202 | */ |
203 | void pcmcia_unregister_driver(struct pcmcia_driver *driver) |
204 | { |
205 | pr_debug("unregistering driver %s\n" , driver->name); |
206 | pcmcia_remove_newid_file(drv: driver); |
207 | driver_unregister(drv: &driver->drv); |
208 | pcmcia_free_dynids(drv: driver); |
209 | } |
210 | EXPORT_SYMBOL(pcmcia_unregister_driver); |
211 | |
212 | |
213 | /* pcmcia_device handling */ |
214 | |
215 | static struct pcmcia_device *pcmcia_get_dev(struct pcmcia_device *p_dev) |
216 | { |
217 | struct device *tmp_dev; |
218 | tmp_dev = get_device(dev: &p_dev->dev); |
219 | if (!tmp_dev) |
220 | return NULL; |
221 | return to_pcmcia_dev(tmp_dev); |
222 | } |
223 | |
224 | static void pcmcia_put_dev(struct pcmcia_device *p_dev) |
225 | { |
226 | if (p_dev) |
227 | put_device(dev: &p_dev->dev); |
228 | } |
229 | |
230 | static void pcmcia_release_function(struct kref *ref) |
231 | { |
232 | struct config_t *c = container_of(ref, struct config_t, ref); |
233 | pr_debug("releasing config_t\n" ); |
234 | kfree(objp: c); |
235 | } |
236 | |
237 | static void pcmcia_release_dev(struct device *dev) |
238 | { |
239 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
240 | int i; |
241 | dev_dbg(dev, "releasing device\n" ); |
242 | pcmcia_put_socket(skt: p_dev->socket); |
243 | for (i = 0; i < 4; i++) |
244 | kfree(objp: p_dev->prod_id[i]); |
245 | kfree(objp: p_dev->devname); |
246 | kref_put(kref: &p_dev->function_config->ref, release: pcmcia_release_function); |
247 | kfree(objp: p_dev); |
248 | } |
249 | |
250 | |
251 | static int pcmcia_device_probe(struct device *dev) |
252 | { |
253 | struct pcmcia_device *p_dev; |
254 | struct pcmcia_driver *p_drv; |
255 | struct pcmcia_socket *s; |
256 | cistpl_config_t cis_config; |
257 | int ret = 0; |
258 | |
259 | dev = get_device(dev); |
260 | if (!dev) |
261 | return -ENODEV; |
262 | |
263 | p_dev = to_pcmcia_dev(dev); |
264 | p_drv = to_pcmcia_drv(dev->driver); |
265 | s = p_dev->socket; |
266 | |
267 | dev_dbg(dev, "trying to bind to %s\n" , p_drv->name); |
268 | |
269 | if ((!p_drv->probe) || (!p_dev->function_config) || |
270 | (!try_module_get(module: p_drv->owner))) { |
271 | ret = -EINVAL; |
272 | goto put_dev; |
273 | } |
274 | |
275 | /* set up some more device information */ |
276 | ret = pccard_read_tuple(s: p_dev->socket, function: p_dev->func, CISTPL_CONFIG, |
277 | parse: &cis_config); |
278 | if (!ret) { |
279 | p_dev->config_base = cis_config.base; |
280 | p_dev->config_regs = cis_config.rmask[0]; |
281 | dev_dbg(dev, "base %x, regs %x" , p_dev->config_base, |
282 | p_dev->config_regs); |
283 | } else { |
284 | dev_info(dev, |
285 | "pcmcia: could not parse base and rmask0 of CIS\n" ); |
286 | p_dev->config_base = 0; |
287 | p_dev->config_regs = 0; |
288 | } |
289 | |
290 | ret = p_drv->probe(p_dev); |
291 | if (ret) { |
292 | dev_dbg(dev, "binding to %s failed with %d\n" , |
293 | p_drv->name, ret); |
294 | goto put_module; |
295 | } |
296 | dev_dbg(dev, "%s bound: Vpp %d.%d, idx %x, IRQ %d" , p_drv->name, |
297 | p_dev->vpp/10, p_dev->vpp%10, p_dev->config_index, p_dev->irq); |
298 | dev_dbg(dev, "resources: ioport %pR %pR iomem %pR %pR %pR" , |
299 | p_dev->resource[0], p_dev->resource[1], p_dev->resource[2], |
300 | p_dev->resource[3], p_dev->resource[4]); |
301 | |
302 | mutex_lock(&s->ops_mutex); |
303 | if ((s->pcmcia_pfc) && |
304 | (p_dev->socket->device_count == 1) && (p_dev->device_no == 0)) |
305 | pcmcia_parse_uevents(socket: s, PCMCIA_UEVENT_REQUERY); |
306 | mutex_unlock(lock: &s->ops_mutex); |
307 | |
308 | put_module: |
309 | if (ret) |
310 | module_put(module: p_drv->owner); |
311 | put_dev: |
312 | if (ret) |
313 | put_device(dev); |
314 | return ret; |
315 | } |
316 | |
317 | |
318 | /* |
319 | * Removes a PCMCIA card from the device tree and socket list. |
320 | */ |
321 | static void pcmcia_card_remove(struct pcmcia_socket *s, struct pcmcia_device *leftover) |
322 | { |
323 | struct pcmcia_device *p_dev; |
324 | struct pcmcia_device *tmp; |
325 | |
326 | dev_dbg(leftover ? &leftover->dev : &s->dev, |
327 | "pcmcia_card_remove(%d) %s\n" , s->sock, |
328 | leftover ? leftover->devname : "" ); |
329 | |
330 | mutex_lock(&s->ops_mutex); |
331 | if (!leftover) |
332 | s->device_count = 0; |
333 | else |
334 | s->device_count = 1; |
335 | mutex_unlock(lock: &s->ops_mutex); |
336 | |
337 | /* unregister all pcmcia_devices registered with this socket, except leftover */ |
338 | list_for_each_entry_safe(p_dev, tmp, &s->devices_list, socket_device_list) { |
339 | if (p_dev == leftover) |
340 | continue; |
341 | |
342 | mutex_lock(&s->ops_mutex); |
343 | list_del(entry: &p_dev->socket_device_list); |
344 | mutex_unlock(lock: &s->ops_mutex); |
345 | |
346 | dev_dbg(&p_dev->dev, "unregistering device\n" ); |
347 | device_unregister(dev: &p_dev->dev); |
348 | } |
349 | |
350 | return; |
351 | } |
352 | |
353 | static void pcmcia_device_remove(struct device *dev) |
354 | { |
355 | struct pcmcia_device *p_dev; |
356 | struct pcmcia_driver *p_drv; |
357 | int i; |
358 | |
359 | p_dev = to_pcmcia_dev(dev); |
360 | p_drv = to_pcmcia_drv(dev->driver); |
361 | |
362 | dev_dbg(dev, "removing device\n" ); |
363 | |
364 | /* If we're removing the primary module driving a |
365 | * pseudo multi-function card, we need to unbind |
366 | * all devices |
367 | */ |
368 | if ((p_dev->socket->pcmcia_pfc) && |
369 | (p_dev->socket->device_count > 0) && |
370 | (p_dev->device_no == 0)) |
371 | pcmcia_card_remove(s: p_dev->socket, leftover: p_dev); |
372 | |
373 | /* detach the "instance" */ |
374 | if (p_drv->remove) |
375 | p_drv->remove(p_dev); |
376 | |
377 | /* check for proper unloading */ |
378 | if (p_dev->_irq || p_dev->_io || p_dev->_locked) |
379 | dev_info(dev, |
380 | "pcmcia: driver %s did not release config properly\n" , |
381 | p_drv->name); |
382 | |
383 | for (i = 0; i < MAX_WIN; i++) |
384 | if (p_dev->_win & CLIENT_WIN_REQ(i)) |
385 | dev_info(dev, |
386 | "pcmcia: driver %s did not release window properly\n" , |
387 | p_drv->name); |
388 | |
389 | /* references from pcmcia_device_probe */ |
390 | pcmcia_put_dev(p_dev); |
391 | module_put(module: p_drv->owner); |
392 | } |
393 | |
394 | |
395 | /* |
396 | * pcmcia_device_query -- determine information about a pcmcia device |
397 | */ |
398 | static int pcmcia_device_query(struct pcmcia_device *p_dev) |
399 | { |
400 | cistpl_manfid_t manf_id; |
401 | cistpl_funcid_t func_id; |
402 | cistpl_vers_1_t *vers1; |
403 | unsigned int i; |
404 | |
405 | vers1 = kmalloc(size: sizeof(*vers1), GFP_KERNEL); |
406 | if (!vers1) |
407 | return -ENOMEM; |
408 | |
409 | if (!pccard_read_tuple(s: p_dev->socket, BIND_FN_ALL, |
410 | CISTPL_MANFID, parse: &manf_id)) { |
411 | mutex_lock(&p_dev->socket->ops_mutex); |
412 | p_dev->manf_id = manf_id.manf; |
413 | p_dev->card_id = manf_id.card; |
414 | p_dev->has_manf_id = 1; |
415 | p_dev->has_card_id = 1; |
416 | mutex_unlock(lock: &p_dev->socket->ops_mutex); |
417 | } |
418 | |
419 | if (!pccard_read_tuple(s: p_dev->socket, function: p_dev->func, |
420 | CISTPL_FUNCID, parse: &func_id)) { |
421 | mutex_lock(&p_dev->socket->ops_mutex); |
422 | p_dev->func_id = func_id.func; |
423 | p_dev->has_func_id = 1; |
424 | mutex_unlock(lock: &p_dev->socket->ops_mutex); |
425 | } else { |
426 | /* rule of thumb: cards with no FUNCID, but with |
427 | * common memory device geometry information, are |
428 | * probably memory cards (from pcmcia-cs) */ |
429 | cistpl_device_geo_t *devgeo; |
430 | |
431 | devgeo = kmalloc(size: sizeof(*devgeo), GFP_KERNEL); |
432 | if (!devgeo) { |
433 | kfree(objp: vers1); |
434 | return -ENOMEM; |
435 | } |
436 | if (!pccard_read_tuple(s: p_dev->socket, function: p_dev->func, |
437 | CISTPL_DEVICE_GEO, parse: devgeo)) { |
438 | dev_dbg(&p_dev->dev, |
439 | "mem device geometry probably means " |
440 | "FUNCID_MEMORY\n" ); |
441 | mutex_lock(&p_dev->socket->ops_mutex); |
442 | p_dev->func_id = CISTPL_FUNCID_MEMORY; |
443 | p_dev->has_func_id = 1; |
444 | mutex_unlock(lock: &p_dev->socket->ops_mutex); |
445 | } |
446 | kfree(objp: devgeo); |
447 | } |
448 | |
449 | if (!pccard_read_tuple(s: p_dev->socket, BIND_FN_ALL, CISTPL_VERS_1, |
450 | parse: vers1)) { |
451 | mutex_lock(&p_dev->socket->ops_mutex); |
452 | for (i = 0; i < min_t(unsigned int, 4, vers1->ns); i++) { |
453 | char *tmp; |
454 | unsigned int length; |
455 | char *new; |
456 | |
457 | tmp = vers1->str + vers1->ofs[i]; |
458 | |
459 | length = strlen(tmp) + 1; |
460 | if ((length < 2) || (length > 255)) |
461 | continue; |
462 | |
463 | new = kstrdup(s: tmp, GFP_KERNEL); |
464 | if (!new) |
465 | continue; |
466 | |
467 | tmp = p_dev->prod_id[i]; |
468 | p_dev->prod_id[i] = new; |
469 | kfree(objp: tmp); |
470 | } |
471 | mutex_unlock(lock: &p_dev->socket->ops_mutex); |
472 | } |
473 | |
474 | kfree(objp: vers1); |
475 | return 0; |
476 | } |
477 | |
478 | |
479 | static struct pcmcia_device *pcmcia_device_add(struct pcmcia_socket *s, |
480 | unsigned int function) |
481 | { |
482 | struct pcmcia_device *p_dev, *tmp_dev; |
483 | int i; |
484 | |
485 | s = pcmcia_get_socket(skt: s); |
486 | if (!s) |
487 | return NULL; |
488 | |
489 | pr_debug("adding device to %d, function %d\n" , s->sock, function); |
490 | |
491 | p_dev = kzalloc(size: sizeof(struct pcmcia_device), GFP_KERNEL); |
492 | if (!p_dev) |
493 | goto err_put; |
494 | |
495 | mutex_lock(&s->ops_mutex); |
496 | p_dev->device_no = (s->device_count++); |
497 | mutex_unlock(lock: &s->ops_mutex); |
498 | |
499 | /* max of 2 PFC devices */ |
500 | if ((p_dev->device_no >= 2) && (function == 0)) |
501 | goto err_free; |
502 | |
503 | /* max of 4 devices overall */ |
504 | if (p_dev->device_no >= 4) |
505 | goto err_free; |
506 | |
507 | p_dev->socket = s; |
508 | p_dev->func = function; |
509 | |
510 | p_dev->dev.bus = &pcmcia_bus_type; |
511 | p_dev->dev.parent = s->dev.parent; |
512 | p_dev->dev.release = pcmcia_release_dev; |
513 | /* by default don't allow DMA */ |
514 | p_dev->dma_mask = 0; |
515 | p_dev->dev.dma_mask = &p_dev->dma_mask; |
516 | p_dev->devname = kasprintf(GFP_KERNEL, fmt: "pcmcia%s" , dev_name(dev: &p_dev->dev)); |
517 | if (!p_dev->devname) |
518 | goto err_free; |
519 | dev_dbg(&p_dev->dev, "devname is %s\n" , p_dev->devname); |
520 | |
521 | mutex_lock(&s->ops_mutex); |
522 | |
523 | /* |
524 | * p_dev->function_config must be the same for all card functions. |
525 | * Note that this is serialized by ops_mutex, so that only one |
526 | * such struct will be created. |
527 | */ |
528 | list_for_each_entry(tmp_dev, &s->devices_list, socket_device_list) |
529 | if (p_dev->func == tmp_dev->func) { |
530 | p_dev->function_config = tmp_dev->function_config; |
531 | p_dev->irq = tmp_dev->irq; |
532 | kref_get(kref: &p_dev->function_config->ref); |
533 | } |
534 | |
535 | /* Add to the list in pcmcia_bus_socket */ |
536 | list_add(new: &p_dev->socket_device_list, head: &s->devices_list); |
537 | |
538 | if (pcmcia_setup_irq(p_dev)) |
539 | dev_warn(&p_dev->dev, |
540 | "IRQ setup failed -- device might not work\n" ); |
541 | |
542 | if (!p_dev->function_config) { |
543 | config_t *c; |
544 | dev_dbg(&p_dev->dev, "creating config_t\n" ); |
545 | c = kzalloc(size: sizeof(struct config_t), GFP_KERNEL); |
546 | if (!c) { |
547 | mutex_unlock(lock: &s->ops_mutex); |
548 | goto err_unreg; |
549 | } |
550 | p_dev->function_config = c; |
551 | kref_init(kref: &c->ref); |
552 | for (i = 0; i < MAX_IO_WIN; i++) { |
553 | c->io[i].name = p_dev->devname; |
554 | c->io[i].flags = IORESOURCE_IO; |
555 | } |
556 | for (i = 0; i < MAX_WIN; i++) { |
557 | c->mem[i].name = p_dev->devname; |
558 | c->mem[i].flags = IORESOURCE_MEM; |
559 | } |
560 | } |
561 | for (i = 0; i < MAX_IO_WIN; i++) |
562 | p_dev->resource[i] = &p_dev->function_config->io[i]; |
563 | for (; i < (MAX_IO_WIN + MAX_WIN); i++) |
564 | p_dev->resource[i] = &p_dev->function_config->mem[i-MAX_IO_WIN]; |
565 | |
566 | mutex_unlock(lock: &s->ops_mutex); |
567 | |
568 | dev_notice(&p_dev->dev, "pcmcia: registering new device %s (IRQ: %d)\n" , |
569 | p_dev->devname, p_dev->irq); |
570 | |
571 | pcmcia_device_query(p_dev); |
572 | |
573 | dev_set_name(dev: &p_dev->dev, name: "%d.%d" , p_dev->socket->sock, p_dev->device_no); |
574 | if (device_register(dev: &p_dev->dev)) { |
575 | mutex_lock(&s->ops_mutex); |
576 | list_del(entry: &p_dev->socket_device_list); |
577 | s->device_count--; |
578 | mutex_unlock(lock: &s->ops_mutex); |
579 | put_device(dev: &p_dev->dev); |
580 | return NULL; |
581 | } |
582 | |
583 | return p_dev; |
584 | |
585 | err_unreg: |
586 | mutex_lock(&s->ops_mutex); |
587 | list_del(entry: &p_dev->socket_device_list); |
588 | mutex_unlock(lock: &s->ops_mutex); |
589 | |
590 | err_free: |
591 | mutex_lock(&s->ops_mutex); |
592 | s->device_count--; |
593 | mutex_unlock(lock: &s->ops_mutex); |
594 | |
595 | for (i = 0; i < 4; i++) |
596 | kfree(objp: p_dev->prod_id[i]); |
597 | kfree(objp: p_dev->devname); |
598 | kfree(objp: p_dev); |
599 | err_put: |
600 | pcmcia_put_socket(skt: s); |
601 | |
602 | return NULL; |
603 | } |
604 | |
605 | |
606 | static int pcmcia_card_add(struct pcmcia_socket *s) |
607 | { |
608 | cistpl_longlink_mfc_t mfc; |
609 | unsigned int no_funcs, i, no_chains; |
610 | int ret = -EAGAIN; |
611 | |
612 | mutex_lock(&s->ops_mutex); |
613 | if (!(s->resource_setup_done)) { |
614 | dev_dbg(&s->dev, |
615 | "no resources available, delaying card_add\n" ); |
616 | mutex_unlock(lock: &s->ops_mutex); |
617 | return -EAGAIN; /* try again, but later... */ |
618 | } |
619 | |
620 | if (pcmcia_validate_mem(s)) { |
621 | dev_dbg(&s->dev, "validating mem resources failed, " |
622 | "delaying card_add\n" ); |
623 | mutex_unlock(lock: &s->ops_mutex); |
624 | return -EAGAIN; /* try again, but later... */ |
625 | } |
626 | mutex_unlock(lock: &s->ops_mutex); |
627 | |
628 | ret = pccard_validate_cis(s, count: &no_chains); |
629 | if (ret || !no_chains) { |
630 | #if defined(CONFIG_MTD_PCMCIA_ANONYMOUS) |
631 | /* Set up as an anonymous card. If we don't have anonymous |
632 | memory support then just error the card as there is no |
633 | point trying to second guess. |
634 | |
635 | Note: some cards have just a device entry, it may be |
636 | worth extending support to cover these in future */ |
637 | if (ret == -EIO) { |
638 | dev_info(&s->dev, "no CIS, assuming an anonymous memory card.\n" ); |
639 | pcmcia_replace_cis(s, data: "\xFF" , len: 1); |
640 | no_chains = 1; |
641 | ret = 0; |
642 | } else |
643 | #endif |
644 | { |
645 | dev_dbg(&s->dev, "invalid CIS or invalid resources\n" ); |
646 | return -ENODEV; |
647 | } |
648 | } |
649 | |
650 | if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, parse: &mfc)) |
651 | no_funcs = mfc.nfn; |
652 | else |
653 | no_funcs = 1; |
654 | s->functions = no_funcs; |
655 | |
656 | for (i = 0; i < no_funcs; i++) |
657 | pcmcia_device_add(s, function: i); |
658 | |
659 | return ret; |
660 | } |
661 | |
662 | |
663 | static int pcmcia_requery_callback(struct device *dev, void *_data) |
664 | { |
665 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
666 | if (!p_dev->dev.driver) { |
667 | dev_dbg(dev, "update device information\n" ); |
668 | pcmcia_device_query(p_dev); |
669 | } |
670 | |
671 | return 0; |
672 | } |
673 | |
674 | |
675 | static void pcmcia_requery(struct pcmcia_socket *s) |
676 | { |
677 | int has_pfc; |
678 | |
679 | if (!(s->state & SOCKET_PRESENT)) |
680 | return; |
681 | |
682 | if (s->functions == 0) { |
683 | pcmcia_card_add(s); |
684 | return; |
685 | } |
686 | |
687 | /* some device information might have changed because of a CIS |
688 | * update or because we can finally read it correctly... so |
689 | * determine it again, overwriting old values if necessary. */ |
690 | bus_for_each_dev(bus: &pcmcia_bus_type, NULL, NULL, fn: pcmcia_requery_callback); |
691 | |
692 | /* if the CIS changed, we need to check whether the number of |
693 | * functions changed. */ |
694 | if (s->fake_cis) { |
695 | int old_funcs, new_funcs; |
696 | cistpl_longlink_mfc_t mfc; |
697 | |
698 | /* does this cis override add or remove functions? */ |
699 | old_funcs = s->functions; |
700 | |
701 | if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, |
702 | parse: &mfc)) |
703 | new_funcs = mfc.nfn; |
704 | else |
705 | new_funcs = 1; |
706 | if (old_funcs != new_funcs) { |
707 | /* we need to re-start */ |
708 | pcmcia_card_remove(s, NULL); |
709 | s->functions = 0; |
710 | pcmcia_card_add(s); |
711 | } |
712 | } |
713 | |
714 | /* If the PCMCIA device consists of two pseudo devices, |
715 | * call pcmcia_device_add() -- which will fail if both |
716 | * devices are already registered. */ |
717 | mutex_lock(&s->ops_mutex); |
718 | has_pfc = s->pcmcia_pfc; |
719 | mutex_unlock(lock: &s->ops_mutex); |
720 | if (has_pfc) |
721 | pcmcia_device_add(s, function: 0); |
722 | |
723 | /* we re-scan all devices, not just the ones connected to this |
724 | * socket. This does not matter, though. */ |
725 | if (bus_rescan_devices(bus: &pcmcia_bus_type)) |
726 | dev_warn(&s->dev, "rescanning the bus failed\n" ); |
727 | } |
728 | |
729 | |
730 | #ifdef CONFIG_PCMCIA_LOAD_CIS |
731 | |
732 | /** |
733 | * pcmcia_load_firmware - load CIS from userspace if device-provided is broken |
734 | * @dev: the pcmcia device which needs a CIS override |
735 | * @filename: requested filename in /lib/firmware/ |
736 | * |
737 | * This uses the in-kernel firmware loading mechanism to use a "fake CIS" if |
738 | * the one provided by the card is broken. The firmware files reside in |
739 | * /lib/firmware/ in userspace. |
740 | */ |
741 | static int pcmcia_load_firmware(struct pcmcia_device *dev, char *filename) |
742 | { |
743 | struct pcmcia_socket *s = dev->socket; |
744 | const struct firmware *fw; |
745 | int ret = -ENOMEM; |
746 | cistpl_longlink_mfc_t mfc; |
747 | int old_funcs, new_funcs = 1; |
748 | |
749 | if (!filename) |
750 | return -EINVAL; |
751 | |
752 | dev_dbg(&dev->dev, "trying to load CIS file %s\n" , filename); |
753 | |
754 | if (request_firmware(fw: &fw, name: filename, device: &dev->dev) == 0) { |
755 | if (fw->size >= CISTPL_MAX_CIS_SIZE) { |
756 | ret = -EINVAL; |
757 | dev_err(&dev->dev, "pcmcia: CIS override is too big\n" ); |
758 | goto release; |
759 | } |
760 | |
761 | if (!pcmcia_replace_cis(s, data: fw->data, len: fw->size)) |
762 | ret = 0; |
763 | else { |
764 | dev_err(&dev->dev, "pcmcia: CIS override failed\n" ); |
765 | goto release; |
766 | } |
767 | |
768 | /* we need to re-start if the number of functions changed */ |
769 | old_funcs = s->functions; |
770 | if (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_LONGLINK_MFC, |
771 | parse: &mfc)) |
772 | new_funcs = mfc.nfn; |
773 | |
774 | if (old_funcs != new_funcs) |
775 | ret = -EBUSY; |
776 | |
777 | /* update information */ |
778 | pcmcia_device_query(p_dev: dev); |
779 | |
780 | /* requery (as number of functions might have changed) */ |
781 | pcmcia_parse_uevents(socket: s, PCMCIA_UEVENT_REQUERY); |
782 | } |
783 | release: |
784 | release_firmware(fw); |
785 | |
786 | return ret; |
787 | } |
788 | |
789 | #else /* !CONFIG_PCMCIA_LOAD_CIS */ |
790 | |
791 | static inline int pcmcia_load_firmware(struct pcmcia_device *dev, |
792 | char *filename) |
793 | { |
794 | return -ENODEV; |
795 | } |
796 | |
797 | #endif |
798 | |
799 | |
800 | static inline int pcmcia_devmatch(struct pcmcia_device *dev, |
801 | const struct pcmcia_device_id *did) |
802 | { |
803 | if (did->match_flags & PCMCIA_DEV_ID_MATCH_MANF_ID) { |
804 | if ((!dev->has_manf_id) || (dev->manf_id != did->manf_id)) |
805 | return 0; |
806 | } |
807 | |
808 | if (did->match_flags & PCMCIA_DEV_ID_MATCH_CARD_ID) { |
809 | if ((!dev->has_card_id) || (dev->card_id != did->card_id)) |
810 | return 0; |
811 | } |
812 | |
813 | if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNCTION) { |
814 | if (dev->func != did->function) |
815 | return 0; |
816 | } |
817 | |
818 | if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID1) { |
819 | if (!dev->prod_id[0]) |
820 | return 0; |
821 | if (strcmp(did->prod_id[0], dev->prod_id[0])) |
822 | return 0; |
823 | } |
824 | |
825 | if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID2) { |
826 | if (!dev->prod_id[1]) |
827 | return 0; |
828 | if (strcmp(did->prod_id[1], dev->prod_id[1])) |
829 | return 0; |
830 | } |
831 | |
832 | if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID3) { |
833 | if (!dev->prod_id[2]) |
834 | return 0; |
835 | if (strcmp(did->prod_id[2], dev->prod_id[2])) |
836 | return 0; |
837 | } |
838 | |
839 | if (did->match_flags & PCMCIA_DEV_ID_MATCH_PROD_ID4) { |
840 | if (!dev->prod_id[3]) |
841 | return 0; |
842 | if (strcmp(did->prod_id[3], dev->prod_id[3])) |
843 | return 0; |
844 | } |
845 | |
846 | if (did->match_flags & PCMCIA_DEV_ID_MATCH_DEVICE_NO) { |
847 | dev_dbg(&dev->dev, "this is a pseudo-multi-function device\n" ); |
848 | mutex_lock(&dev->socket->ops_mutex); |
849 | dev->socket->pcmcia_pfc = 1; |
850 | mutex_unlock(lock: &dev->socket->ops_mutex); |
851 | if (dev->device_no != did->device_no) |
852 | return 0; |
853 | } |
854 | |
855 | if (did->match_flags & PCMCIA_DEV_ID_MATCH_FUNC_ID) { |
856 | int ret; |
857 | |
858 | if ((!dev->has_func_id) || (dev->func_id != did->func_id)) |
859 | return 0; |
860 | |
861 | /* if this is a pseudo-multi-function device, |
862 | * we need explicit matches */ |
863 | if (dev->socket->pcmcia_pfc) |
864 | return 0; |
865 | if (dev->device_no) |
866 | return 0; |
867 | |
868 | /* also, FUNC_ID matching needs to be activated by userspace |
869 | * after it has re-checked that there is no possible module |
870 | * with a prod_id/manf_id/card_id match. |
871 | */ |
872 | mutex_lock(&dev->socket->ops_mutex); |
873 | ret = dev->allow_func_id_match; |
874 | mutex_unlock(lock: &dev->socket->ops_mutex); |
875 | |
876 | if (!ret) { |
877 | dev_dbg(&dev->dev, |
878 | "skipping FUNC_ID match until userspace ACK\n" ); |
879 | return 0; |
880 | } |
881 | } |
882 | |
883 | if (did->match_flags & PCMCIA_DEV_ID_MATCH_FAKE_CIS) { |
884 | dev_dbg(&dev->dev, "device needs a fake CIS\n" ); |
885 | if (!dev->socket->fake_cis) |
886 | if (pcmcia_load_firmware(dev, filename: did->cisfile)) |
887 | return 0; |
888 | } |
889 | |
890 | if (did->match_flags & PCMCIA_DEV_ID_MATCH_ANONYMOUS) { |
891 | int i; |
892 | for (i = 0; i < 4; i++) |
893 | if (dev->prod_id[i]) |
894 | return 0; |
895 | if (dev->has_manf_id || dev->has_card_id || dev->has_func_id) |
896 | return 0; |
897 | } |
898 | |
899 | return 1; |
900 | } |
901 | |
902 | |
903 | static int pcmcia_bus_match(struct device *dev, struct device_driver *drv) |
904 | { |
905 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
906 | struct pcmcia_driver *p_drv = to_pcmcia_drv(drv); |
907 | const struct pcmcia_device_id *did = p_drv->id_table; |
908 | struct pcmcia_dynid *dynid; |
909 | |
910 | /* match dynamic devices first */ |
911 | mutex_lock(&p_drv->dynids.lock); |
912 | list_for_each_entry(dynid, &p_drv->dynids.list, node) { |
913 | dev_dbg(dev, "trying to match to %s\n" , drv->name); |
914 | if (pcmcia_devmatch(dev: p_dev, did: &dynid->id)) { |
915 | dev_dbg(dev, "matched to %s\n" , drv->name); |
916 | mutex_unlock(lock: &p_drv->dynids.lock); |
917 | return 1; |
918 | } |
919 | } |
920 | mutex_unlock(lock: &p_drv->dynids.lock); |
921 | |
922 | while (did && did->match_flags) { |
923 | dev_dbg(dev, "trying to match to %s\n" , drv->name); |
924 | if (pcmcia_devmatch(dev: p_dev, did)) { |
925 | dev_dbg(dev, "matched to %s\n" , drv->name); |
926 | return 1; |
927 | } |
928 | did++; |
929 | } |
930 | |
931 | return 0; |
932 | } |
933 | |
934 | static int pcmcia_bus_uevent(const struct device *dev, struct kobj_uevent_env *env) |
935 | { |
936 | const struct pcmcia_device *p_dev; |
937 | int i; |
938 | u32 hash[4] = { 0, 0, 0, 0}; |
939 | |
940 | if (!dev) |
941 | return -ENODEV; |
942 | |
943 | p_dev = to_pcmcia_dev(dev); |
944 | |
945 | /* calculate hashes */ |
946 | for (i = 0; i < 4; i++) { |
947 | if (!p_dev->prod_id[i]) |
948 | continue; |
949 | hash[i] = crc32(0, p_dev->prod_id[i], strlen(p_dev->prod_id[i])); |
950 | } |
951 | |
952 | if (add_uevent_var(env, format: "SOCKET_NO=%u" , p_dev->socket->sock)) |
953 | return -ENOMEM; |
954 | |
955 | if (add_uevent_var(env, format: "DEVICE_NO=%02X" , p_dev->device_no)) |
956 | return -ENOMEM; |
957 | |
958 | if (add_uevent_var(env, format: "MODALIAS=pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02X" |
959 | "pa%08Xpb%08Xpc%08Xpd%08X" , |
960 | p_dev->has_manf_id ? p_dev->manf_id : 0, |
961 | p_dev->has_card_id ? p_dev->card_id : 0, |
962 | p_dev->has_func_id ? p_dev->func_id : 0, |
963 | p_dev->func, |
964 | p_dev->device_no, |
965 | hash[0], |
966 | hash[1], |
967 | hash[2], |
968 | hash[3])) |
969 | return -ENOMEM; |
970 | |
971 | return 0; |
972 | } |
973 | |
974 | /************************ runtime PM support ***************************/ |
975 | |
976 | static int pcmcia_dev_suspend(struct device *dev); |
977 | static int pcmcia_dev_resume(struct device *dev); |
978 | |
979 | static int runtime_suspend(struct device *dev) |
980 | { |
981 | int rc; |
982 | |
983 | device_lock(dev); |
984 | rc = pcmcia_dev_suspend(dev); |
985 | device_unlock(dev); |
986 | return rc; |
987 | } |
988 | |
989 | static int runtime_resume(struct device *dev) |
990 | { |
991 | int rc; |
992 | |
993 | device_lock(dev); |
994 | rc = pcmcia_dev_resume(dev); |
995 | device_unlock(dev); |
996 | return rc; |
997 | } |
998 | |
999 | /************************ per-device sysfs output ***************************/ |
1000 | |
1001 | #define pcmcia_device_attr(field, test, format) \ |
1002 | static ssize_t field##_show (struct device *dev, struct device_attribute *attr, char *buf) \ |
1003 | { \ |
1004 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ |
1005 | return p_dev->test ? sysfs_emit(buf, format, p_dev->field) : -ENODEV; \ |
1006 | } \ |
1007 | static DEVICE_ATTR_RO(field); |
1008 | |
1009 | #define pcmcia_device_stringattr(name, field) \ |
1010 | static ssize_t name##_show (struct device *dev, struct device_attribute *attr, char *buf) \ |
1011 | { \ |
1012 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); \ |
1013 | return p_dev->field ? sysfs_emit(buf, "%s\n", p_dev->field) : -ENODEV; \ |
1014 | } \ |
1015 | static DEVICE_ATTR_RO(name); |
1016 | |
1017 | pcmcia_device_attr(func_id, has_func_id, "0x%02x\n" ); |
1018 | pcmcia_device_attr(manf_id, has_manf_id, "0x%04x\n" ); |
1019 | pcmcia_device_attr(card_id, has_card_id, "0x%04x\n" ); |
1020 | pcmcia_device_stringattr(prod_id1, prod_id[0]); |
1021 | pcmcia_device_stringattr(prod_id2, prod_id[1]); |
1022 | pcmcia_device_stringattr(prod_id3, prod_id[2]); |
1023 | pcmcia_device_stringattr(prod_id4, prod_id[3]); |
1024 | |
1025 | static ssize_t function_show(struct device *dev, struct device_attribute *attr, |
1026 | char *buf) |
1027 | { |
1028 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
1029 | return p_dev->socket ? sysfs_emit(buf, fmt: "0x%02x\n" , p_dev->func) : -ENODEV; |
1030 | } |
1031 | static DEVICE_ATTR_RO(function); |
1032 | |
1033 | static ssize_t resources_show(struct device *dev, |
1034 | struct device_attribute *attr, char *buf) |
1035 | { |
1036 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
1037 | int i, at = 0; |
1038 | |
1039 | for (i = 0; i < PCMCIA_NUM_RESOURCES; i++) |
1040 | at += sysfs_emit_at(buf, at, fmt: "%pr\n" , p_dev->resource[i]); |
1041 | |
1042 | return at; |
1043 | } |
1044 | static DEVICE_ATTR_RO(resources); |
1045 | |
1046 | static ssize_t pm_state_show(struct device *dev, struct device_attribute *attr, char *buf) |
1047 | { |
1048 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
1049 | |
1050 | if (p_dev->suspended) |
1051 | return sysfs_emit(buf, fmt: "off\n" ); |
1052 | else |
1053 | return sysfs_emit(buf, fmt: "on\n" ); |
1054 | } |
1055 | |
1056 | static ssize_t pm_state_store(struct device *dev, struct device_attribute *attr, |
1057 | const char *buf, size_t count) |
1058 | { |
1059 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
1060 | int ret = 0; |
1061 | |
1062 | if (!count) |
1063 | return -EINVAL; |
1064 | |
1065 | if ((!p_dev->suspended) && !strncmp(buf, "off" , 3)) |
1066 | ret = runtime_suspend(dev); |
1067 | else if (p_dev->suspended && !strncmp(buf, "on" , 2)) |
1068 | ret = runtime_resume(dev); |
1069 | |
1070 | return ret ? ret : count; |
1071 | } |
1072 | static DEVICE_ATTR_RW(pm_state); |
1073 | |
1074 | static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) |
1075 | { |
1076 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
1077 | int i; |
1078 | u32 hash[4] = { 0, 0, 0, 0}; |
1079 | |
1080 | /* calculate hashes */ |
1081 | for (i = 0; i < 4; i++) { |
1082 | if (!p_dev->prod_id[i]) |
1083 | continue; |
1084 | hash[i] = crc32(0, p_dev->prod_id[i], |
1085 | strlen(p_dev->prod_id[i])); |
1086 | } |
1087 | return sysfs_emit(buf, fmt: "pcmcia:m%04Xc%04Xf%02Xfn%02Xpfn%02Xpa%08Xpb%08Xpc%08Xpd%08X\n" , |
1088 | p_dev->has_manf_id ? p_dev->manf_id : 0, |
1089 | p_dev->has_card_id ? p_dev->card_id : 0, |
1090 | p_dev->has_func_id ? p_dev->func_id : 0, |
1091 | p_dev->func, p_dev->device_no, |
1092 | hash[0], hash[1], hash[2], hash[3]); |
1093 | } |
1094 | static DEVICE_ATTR_RO(modalias); |
1095 | |
1096 | static ssize_t allow_func_id_match_store(struct device *dev, |
1097 | struct device_attribute *attr, const char *buf, size_t count) |
1098 | { |
1099 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
1100 | |
1101 | if (!count) |
1102 | return -EINVAL; |
1103 | |
1104 | mutex_lock(&p_dev->socket->ops_mutex); |
1105 | p_dev->allow_func_id_match = 1; |
1106 | mutex_unlock(lock: &p_dev->socket->ops_mutex); |
1107 | pcmcia_parse_uevents(socket: p_dev->socket, PCMCIA_UEVENT_REQUERY); |
1108 | |
1109 | return count; |
1110 | } |
1111 | static DEVICE_ATTR_WO(allow_func_id_match); |
1112 | |
1113 | static struct attribute *pcmcia_dev_attrs[] = { |
1114 | &dev_attr_resources.attr, |
1115 | &dev_attr_pm_state.attr, |
1116 | &dev_attr_function.attr, |
1117 | &dev_attr_func_id.attr, |
1118 | &dev_attr_manf_id.attr, |
1119 | &dev_attr_card_id.attr, |
1120 | &dev_attr_prod_id1.attr, |
1121 | &dev_attr_prod_id2.attr, |
1122 | &dev_attr_prod_id3.attr, |
1123 | &dev_attr_prod_id4.attr, |
1124 | &dev_attr_modalias.attr, |
1125 | &dev_attr_allow_func_id_match.attr, |
1126 | NULL, |
1127 | }; |
1128 | ATTRIBUTE_GROUPS(pcmcia_dev); |
1129 | |
1130 | /* PM support, also needed for reset */ |
1131 | |
1132 | static int pcmcia_dev_suspend(struct device *dev) |
1133 | { |
1134 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
1135 | struct pcmcia_driver *p_drv = NULL; |
1136 | int ret = 0; |
1137 | |
1138 | mutex_lock(&p_dev->socket->ops_mutex); |
1139 | if (p_dev->suspended) { |
1140 | mutex_unlock(lock: &p_dev->socket->ops_mutex); |
1141 | return 0; |
1142 | } |
1143 | p_dev->suspended = 1; |
1144 | mutex_unlock(lock: &p_dev->socket->ops_mutex); |
1145 | |
1146 | dev_dbg(dev, "suspending\n" ); |
1147 | |
1148 | if (dev->driver) |
1149 | p_drv = to_pcmcia_drv(dev->driver); |
1150 | |
1151 | if (!p_drv) |
1152 | goto out; |
1153 | |
1154 | if (p_drv->suspend) { |
1155 | ret = p_drv->suspend(p_dev); |
1156 | if (ret) { |
1157 | dev_err(dev, |
1158 | "pcmcia: device %s (driver %s) did not want to go to sleep (%d)\n" , |
1159 | p_dev->devname, p_drv->name, ret); |
1160 | mutex_lock(&p_dev->socket->ops_mutex); |
1161 | p_dev->suspended = 0; |
1162 | mutex_unlock(lock: &p_dev->socket->ops_mutex); |
1163 | goto out; |
1164 | } |
1165 | } |
1166 | |
1167 | if (p_dev->device_no == p_dev->func) { |
1168 | dev_dbg(dev, "releasing configuration\n" ); |
1169 | pcmcia_release_configuration(p_dev); |
1170 | } |
1171 | |
1172 | out: |
1173 | return ret; |
1174 | } |
1175 | |
1176 | |
1177 | static int pcmcia_dev_resume(struct device *dev) |
1178 | { |
1179 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
1180 | struct pcmcia_driver *p_drv = NULL; |
1181 | int ret = 0; |
1182 | |
1183 | mutex_lock(&p_dev->socket->ops_mutex); |
1184 | if (!p_dev->suspended) { |
1185 | mutex_unlock(lock: &p_dev->socket->ops_mutex); |
1186 | return 0; |
1187 | } |
1188 | p_dev->suspended = 0; |
1189 | mutex_unlock(lock: &p_dev->socket->ops_mutex); |
1190 | |
1191 | dev_dbg(dev, "resuming\n" ); |
1192 | |
1193 | if (dev->driver) |
1194 | p_drv = to_pcmcia_drv(dev->driver); |
1195 | |
1196 | if (!p_drv) |
1197 | goto out; |
1198 | |
1199 | if (p_dev->device_no == p_dev->func) { |
1200 | dev_dbg(dev, "requesting configuration\n" ); |
1201 | ret = pcmcia_enable_device(p_dev); |
1202 | if (ret) |
1203 | goto out; |
1204 | } |
1205 | |
1206 | if (p_drv->resume) |
1207 | ret = p_drv->resume(p_dev); |
1208 | |
1209 | out: |
1210 | return ret; |
1211 | } |
1212 | |
1213 | |
1214 | static int pcmcia_bus_suspend_callback(struct device *dev, void *_data) |
1215 | { |
1216 | struct pcmcia_socket *skt = _data; |
1217 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
1218 | |
1219 | if (p_dev->socket != skt || p_dev->suspended) |
1220 | return 0; |
1221 | |
1222 | return runtime_suspend(dev); |
1223 | } |
1224 | |
1225 | static int pcmcia_bus_resume_callback(struct device *dev, void *_data) |
1226 | { |
1227 | struct pcmcia_socket *skt = _data; |
1228 | struct pcmcia_device *p_dev = to_pcmcia_dev(dev); |
1229 | |
1230 | if (p_dev->socket != skt || !p_dev->suspended) |
1231 | return 0; |
1232 | |
1233 | runtime_resume(dev); |
1234 | |
1235 | return 0; |
1236 | } |
1237 | |
1238 | static int pcmcia_bus_resume(struct pcmcia_socket *skt) |
1239 | { |
1240 | dev_dbg(&skt->dev, "resuming socket %d\n" , skt->sock); |
1241 | bus_for_each_dev(bus: &pcmcia_bus_type, NULL, data: skt, fn: pcmcia_bus_resume_callback); |
1242 | return 0; |
1243 | } |
1244 | |
1245 | static int pcmcia_bus_suspend(struct pcmcia_socket *skt) |
1246 | { |
1247 | dev_dbg(&skt->dev, "suspending socket %d\n" , skt->sock); |
1248 | if (bus_for_each_dev(bus: &pcmcia_bus_type, NULL, data: skt, |
1249 | fn: pcmcia_bus_suspend_callback)) { |
1250 | pcmcia_bus_resume(skt); |
1251 | return -EIO; |
1252 | } |
1253 | return 0; |
1254 | } |
1255 | |
1256 | static int pcmcia_bus_remove(struct pcmcia_socket *skt) |
1257 | { |
1258 | atomic_set(v: &skt->present, i: 0); |
1259 | pcmcia_card_remove(s: skt, NULL); |
1260 | |
1261 | mutex_lock(&skt->ops_mutex); |
1262 | destroy_cis_cache(s: skt); |
1263 | pcmcia_cleanup_irq(s: skt); |
1264 | mutex_unlock(lock: &skt->ops_mutex); |
1265 | |
1266 | return 0; |
1267 | } |
1268 | |
1269 | static int pcmcia_bus_add(struct pcmcia_socket *skt) |
1270 | { |
1271 | atomic_set(v: &skt->present, i: 1); |
1272 | |
1273 | mutex_lock(&skt->ops_mutex); |
1274 | skt->pcmcia_pfc = 0; |
1275 | destroy_cis_cache(s: skt); /* to be on the safe side... */ |
1276 | mutex_unlock(lock: &skt->ops_mutex); |
1277 | |
1278 | pcmcia_card_add(s: skt); |
1279 | |
1280 | return 0; |
1281 | } |
1282 | |
1283 | static int pcmcia_bus_early_resume(struct pcmcia_socket *skt) |
1284 | { |
1285 | if (!verify_cis_cache(s: skt)) |
1286 | return 0; |
1287 | |
1288 | dev_dbg(&skt->dev, "cis mismatch - different card\n" ); |
1289 | |
1290 | /* first, remove the card */ |
1291 | pcmcia_bus_remove(skt); |
1292 | |
1293 | mutex_lock(&skt->ops_mutex); |
1294 | destroy_cis_cache(s: skt); |
1295 | kfree(objp: skt->fake_cis); |
1296 | skt->fake_cis = NULL; |
1297 | skt->functions = 0; |
1298 | mutex_unlock(lock: &skt->ops_mutex); |
1299 | |
1300 | /* now, add the new card */ |
1301 | pcmcia_bus_add(skt); |
1302 | return 0; |
1303 | } |
1304 | |
1305 | |
1306 | /* |
1307 | * NOTE: This is racy. There's no guarantee the card will still be |
1308 | * physically present, even if the call to this function returns |
1309 | * non-NULL. Furthermore, the device driver most likely is unbound |
1310 | * almost immediately, so the timeframe where pcmcia_dev_present |
1311 | * returns NULL is probably really really small. |
1312 | */ |
1313 | struct pcmcia_device *pcmcia_dev_present(struct pcmcia_device *_p_dev) |
1314 | { |
1315 | struct pcmcia_device *p_dev; |
1316 | struct pcmcia_device *ret = NULL; |
1317 | |
1318 | p_dev = pcmcia_get_dev(p_dev: _p_dev); |
1319 | if (!p_dev) |
1320 | return NULL; |
1321 | |
1322 | if (atomic_read(v: &p_dev->socket->present) != 0) |
1323 | ret = p_dev; |
1324 | |
1325 | pcmcia_put_dev(p_dev); |
1326 | return ret; |
1327 | } |
1328 | EXPORT_SYMBOL(pcmcia_dev_present); |
1329 | |
1330 | |
1331 | static struct pcmcia_callback pcmcia_bus_callback = { |
1332 | .owner = THIS_MODULE, |
1333 | .add = pcmcia_bus_add, |
1334 | .remove = pcmcia_bus_remove, |
1335 | .requery = pcmcia_requery, |
1336 | .validate = pccard_validate_cis, |
1337 | .suspend = pcmcia_bus_suspend, |
1338 | .early_resume = pcmcia_bus_early_resume, |
1339 | .resume = pcmcia_bus_resume, |
1340 | }; |
1341 | |
1342 | static int pcmcia_bus_add_socket(struct device *dev) |
1343 | { |
1344 | struct pcmcia_socket *socket = dev_get_drvdata(dev); |
1345 | int ret; |
1346 | |
1347 | socket = pcmcia_get_socket(skt: socket); |
1348 | if (!socket) { |
1349 | dev_err(dev, "PCMCIA obtaining reference to socket failed\n" ); |
1350 | return -ENODEV; |
1351 | } |
1352 | |
1353 | ret = sysfs_create_bin_file(kobj: &dev->kobj, attr: &pccard_cis_attr); |
1354 | if (ret) { |
1355 | dev_err(dev, "PCMCIA registration failed\n" ); |
1356 | pcmcia_put_socket(skt: socket); |
1357 | return ret; |
1358 | } |
1359 | |
1360 | INIT_LIST_HEAD(list: &socket->devices_list); |
1361 | socket->pcmcia_pfc = 0; |
1362 | socket->device_count = 0; |
1363 | atomic_set(v: &socket->present, i: 0); |
1364 | |
1365 | ret = pccard_register_pcmcia(s: socket, c: &pcmcia_bus_callback); |
1366 | if (ret) { |
1367 | dev_err(dev, "PCMCIA registration failed\n" ); |
1368 | pcmcia_put_socket(skt: socket); |
1369 | return ret; |
1370 | } |
1371 | |
1372 | return 0; |
1373 | } |
1374 | |
1375 | static void pcmcia_bus_remove_socket(struct device *dev) |
1376 | { |
1377 | struct pcmcia_socket *socket = dev_get_drvdata(dev); |
1378 | |
1379 | if (!socket) |
1380 | return; |
1381 | |
1382 | pccard_register_pcmcia(s: socket, NULL); |
1383 | |
1384 | /* unregister any unbound devices */ |
1385 | mutex_lock(&socket->skt_mutex); |
1386 | pcmcia_card_remove(s: socket, NULL); |
1387 | release_cis_mem(s: socket); |
1388 | mutex_unlock(lock: &socket->skt_mutex); |
1389 | |
1390 | sysfs_remove_bin_file(kobj: &dev->kobj, attr: &pccard_cis_attr); |
1391 | |
1392 | pcmcia_put_socket(skt: socket); |
1393 | |
1394 | return; |
1395 | } |
1396 | |
1397 | |
1398 | /* the pcmcia_bus_interface is used to handle pcmcia socket devices */ |
1399 | static struct class_interface pcmcia_bus_interface __refdata = { |
1400 | .class = &pcmcia_socket_class, |
1401 | .add_dev = &pcmcia_bus_add_socket, |
1402 | .remove_dev = &pcmcia_bus_remove_socket, |
1403 | }; |
1404 | |
1405 | static const struct dev_pm_ops pcmcia_bus_pm_ops = { |
1406 | SET_SYSTEM_SLEEP_PM_OPS(pcmcia_dev_suspend, pcmcia_dev_resume) |
1407 | }; |
1408 | |
1409 | struct bus_type pcmcia_bus_type = { |
1410 | .name = "pcmcia" , |
1411 | .uevent = pcmcia_bus_uevent, |
1412 | .match = pcmcia_bus_match, |
1413 | .dev_groups = pcmcia_dev_groups, |
1414 | .probe = pcmcia_device_probe, |
1415 | .remove = pcmcia_device_remove, |
1416 | .pm = &pcmcia_bus_pm_ops, |
1417 | }; |
1418 | |
1419 | |
1420 | static int __init init_pcmcia_bus(void) |
1421 | { |
1422 | int ret; |
1423 | |
1424 | ret = bus_register(bus: &pcmcia_bus_type); |
1425 | if (ret < 0) { |
1426 | printk(KERN_WARNING "pcmcia: bus_register error: %d\n" , ret); |
1427 | return ret; |
1428 | } |
1429 | ret = class_interface_register(&pcmcia_bus_interface); |
1430 | if (ret < 0) { |
1431 | printk(KERN_WARNING |
1432 | "pcmcia: class_interface_register error: %d\n" , ret); |
1433 | bus_unregister(bus: &pcmcia_bus_type); |
1434 | return ret; |
1435 | } |
1436 | |
1437 | return 0; |
1438 | } |
1439 | fs_initcall(init_pcmcia_bus); /* one level after subsys_initcall so that |
1440 | * pcmcia_socket_class is already registered */ |
1441 | |
1442 | |
1443 | static void __exit exit_pcmcia_bus(void) |
1444 | { |
1445 | class_interface_unregister(&pcmcia_bus_interface); |
1446 | |
1447 | bus_unregister(bus: &pcmcia_bus_type); |
1448 | } |
1449 | module_exit(exit_pcmcia_bus); |
1450 | |
1451 | |
1452 | MODULE_ALIAS("ds" ); |
1453 | |