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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * cs.c -- Kernel Card Services - core services | |
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 | */ | |
14 | ||
15 | #include <linux/module.h> | |
16 | #include <linux/moduleparam.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/kernel.h> | |
1da177e4 LT |
19 | #include <linux/string.h> |
20 | #include <linux/major.h> | |
21 | #include <linux/errno.h> | |
22 | #include <linux/slab.h> | |
23 | #include <linux/mm.h> | |
24 | #include <linux/interrupt.h> | |
25 | #include <linux/timer.h> | |
26 | #include <linux/ioport.h> | |
27 | #include <linux/delay.h> | |
28 | #include <linux/pm.h> | |
1da177e4 | 29 | #include <linux/device.h> |
1da9ab73 | 30 | #include <linux/kthread.h> |
7dfb7103 | 31 | #include <linux/freezer.h> |
1da177e4 LT |
32 | #include <asm/system.h> |
33 | #include <asm/irq.h> | |
34 | ||
1da177e4 LT |
35 | #include <pcmcia/cs_types.h> |
36 | #include <pcmcia/ss.h> | |
37 | #include <pcmcia/cs.h> | |
1da177e4 LT |
38 | #include <pcmcia/cistpl.h> |
39 | #include <pcmcia/cisreg.h> | |
40 | #include <pcmcia/ds.h> | |
41 | #include "cs_internal.h" | |
42 | ||
1da177e4 LT |
43 | |
44 | /* Module parameters */ | |
45 | ||
46 | MODULE_AUTHOR("David Hinds <dahinds@users.sourceforge.net>"); | |
33519ddd | 47 | MODULE_DESCRIPTION("Linux Kernel Card Services"); |
1da177e4 LT |
48 | MODULE_LICENSE("GPL"); |
49 | ||
50 | #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444) | |
51 | ||
52 | INT_MODULE_PARM(setup_delay, 10); /* centiseconds */ | |
53 | INT_MODULE_PARM(resume_delay, 20); /* centiseconds */ | |
54 | INT_MODULE_PARM(shutdown_delay, 3); /* centiseconds */ | |
55 | INT_MODULE_PARM(vcc_settle, 40); /* centiseconds */ | |
56 | INT_MODULE_PARM(reset_time, 10); /* usecs */ | |
57 | INT_MODULE_PARM(unreset_delay, 10); /* centiseconds */ | |
58 | INT_MODULE_PARM(unreset_check, 10); /* centiseconds */ | |
59 | INT_MODULE_PARM(unreset_limit, 30); /* unreset_check's */ | |
60 | ||
61 | /* Access speed for attribute memory windows */ | |
62 | INT_MODULE_PARM(cis_speed, 300); /* ns */ | |
63 | ||
1da177e4 LT |
64 | |
65 | socket_state_t dead_socket = { | |
66 | .csc_mask = SS_DETECT, | |
67 | }; | |
33519ddd | 68 | EXPORT_SYMBOL(dead_socket); |
1da177e4 LT |
69 | |
70 | ||
71 | /* List of all sockets, protected by a rwsem */ | |
72 | LIST_HEAD(pcmcia_socket_list); | |
1da177e4 | 73 | EXPORT_SYMBOL(pcmcia_socket_list); |
1da177e4 | 74 | |
33519ddd DB |
75 | DECLARE_RWSEM(pcmcia_socket_list_rwsem); |
76 | EXPORT_SYMBOL(pcmcia_socket_list_rwsem); | |
1da177e4 | 77 | |
1da177e4 | 78 | |
78187865 | 79 | /* |
33519ddd DB |
80 | * Low-level PCMCIA socket drivers need to register with the PCCard |
81 | * core using pcmcia_register_socket. | |
82 | * | |
83 | * socket drivers are expected to use the following callbacks in their | |
1da177e4 LT |
84 | * .drv struct: |
85 | * - pcmcia_socket_dev_suspend | |
86 | * - pcmcia_socket_dev_resume | |
87 | * These functions check for the appropriate struct pcmcia_soket arrays, | |
88 | * and pass them to the low-level functions pcmcia_{suspend,resume}_socket | |
89 | */ | |
9905d1b4 RW |
90 | static int socket_early_resume(struct pcmcia_socket *skt); |
91 | static int socket_late_resume(struct pcmcia_socket *skt); | |
1da177e4 LT |
92 | static int socket_resume(struct pcmcia_socket *skt); |
93 | static int socket_suspend(struct pcmcia_socket *skt); | |
94 | ||
9905d1b4 RW |
95 | static void pcmcia_socket_dev_run(struct device *dev, |
96 | int (*cb)(struct pcmcia_socket *)) | |
1da177e4 LT |
97 | { |
98 | struct pcmcia_socket *socket; | |
99 | ||
100 | down_read(&pcmcia_socket_list_rwsem); | |
101 | list_for_each_entry(socket, &pcmcia_socket_list, socket_list) { | |
87373318 | 102 | if (socket->dev.parent != dev) |
1da177e4 | 103 | continue; |
7fe908dd | 104 | mutex_lock(&socket->skt_mutex); |
9905d1b4 | 105 | cb(socket); |
7fe908dd | 106 | mutex_unlock(&socket->skt_mutex); |
1da177e4 LT |
107 | } |
108 | up_read(&pcmcia_socket_list_rwsem); | |
9905d1b4 | 109 | } |
1da177e4 | 110 | |
9905d1b4 RW |
111 | int pcmcia_socket_dev_suspend(struct device *dev) |
112 | { | |
113 | pcmcia_socket_dev_run(dev, socket_suspend); | |
1da177e4 LT |
114 | return 0; |
115 | } | |
116 | EXPORT_SYMBOL(pcmcia_socket_dev_suspend); | |
117 | ||
9905d1b4 | 118 | void pcmcia_socket_dev_early_resume(struct device *dev) |
1da177e4 | 119 | { |
9905d1b4 RW |
120 | pcmcia_socket_dev_run(dev, socket_early_resume); |
121 | } | |
122 | EXPORT_SYMBOL(pcmcia_socket_dev_early_resume); | |
1da177e4 | 123 | |
9905d1b4 RW |
124 | void pcmcia_socket_dev_late_resume(struct device *dev) |
125 | { | |
126 | pcmcia_socket_dev_run(dev, socket_late_resume); | |
127 | } | |
128 | EXPORT_SYMBOL(pcmcia_socket_dev_late_resume); | |
1da177e4 | 129 | |
9905d1b4 RW |
130 | int pcmcia_socket_dev_resume(struct device *dev) |
131 | { | |
132 | pcmcia_socket_dev_run(dev, socket_resume); | |
1da177e4 LT |
133 | return 0; |
134 | } | |
135 | EXPORT_SYMBOL(pcmcia_socket_dev_resume); | |
136 | ||
137 | ||
9fea84f4 | 138 | struct pcmcia_socket *pcmcia_get_socket(struct pcmcia_socket *skt) |
1da177e4 | 139 | { |
87373318 GKH |
140 | struct device *dev = get_device(&skt->dev); |
141 | if (!dev) | |
1da177e4 | 142 | return NULL; |
593f010b | 143 | return dev_get_drvdata(dev); |
1da177e4 LT |
144 | } |
145 | EXPORT_SYMBOL(pcmcia_get_socket); | |
146 | ||
147 | ||
148 | void pcmcia_put_socket(struct pcmcia_socket *skt) | |
149 | { | |
87373318 | 150 | put_device(&skt->dev); |
1da177e4 LT |
151 | } |
152 | EXPORT_SYMBOL(pcmcia_put_socket); | |
153 | ||
154 | ||
87373318 | 155 | static void pcmcia_release_socket(struct device *dev) |
1da177e4 | 156 | { |
87373318 | 157 | struct pcmcia_socket *socket = dev_get_drvdata(dev); |
1da177e4 LT |
158 | |
159 | complete(&socket->socket_released); | |
160 | } | |
161 | ||
162 | static int pccardd(void *__skt); | |
163 | ||
164 | /** | |
165 | * pcmcia_register_socket - add a new pcmcia socket device | |
78187865 | 166 | * @socket: the &socket to register |
1da177e4 LT |
167 | */ |
168 | int pcmcia_register_socket(struct pcmcia_socket *socket) | |
169 | { | |
1da9ab73 | 170 | struct task_struct *tsk; |
1da177e4 LT |
171 | int ret; |
172 | ||
87373318 | 173 | if (!socket || !socket->ops || !socket->dev.parent || !socket->resource_ops) |
1da177e4 LT |
174 | return -EINVAL; |
175 | ||
d50dbec3 | 176 | dev_dbg(&socket->dev, "pcmcia_register_socket(0x%p)\n", socket->ops); |
1da177e4 | 177 | |
1da177e4 | 178 | /* try to obtain a socket number [yes, it gets ugly if we |
33519ddd DB |
179 | * register more than 2^sizeof(unsigned int) pcmcia |
180 | * sockets... but the socket number is deprecated | |
1da177e4 LT |
181 | * anyways, so I don't care] */ |
182 | down_write(&pcmcia_socket_list_rwsem); | |
183 | if (list_empty(&pcmcia_socket_list)) | |
184 | socket->sock = 0; | |
185 | else { | |
186 | unsigned int found, i = 1; | |
187 | struct pcmcia_socket *tmp; | |
188 | do { | |
189 | found = 1; | |
190 | list_for_each_entry(tmp, &pcmcia_socket_list, socket_list) { | |
191 | if (tmp->sock == i) | |
192 | found = 0; | |
193 | } | |
194 | i++; | |
195 | } while (!found); | |
196 | socket->sock = i - 1; | |
197 | } | |
198 | list_add_tail(&socket->socket_list, &pcmcia_socket_list); | |
199 | up_write(&pcmcia_socket_list_rwsem); | |
200 | ||
5bc6b68a RK |
201 | #ifndef CONFIG_CARDBUS |
202 | /* | |
203 | * If we do not support Cardbus, ensure that | |
204 | * the Cardbus socket capability is disabled. | |
205 | */ | |
206 | socket->features &= ~SS_CAP_CARDBUS; | |
207 | #endif | |
1da177e4 LT |
208 | |
209 | /* set proper values in socket->dev */ | |
87373318 | 210 | dev_set_drvdata(&socket->dev, socket); |
1da177e4 | 211 | socket->dev.class = &pcmcia_socket_class; |
25096986 | 212 | dev_set_name(&socket->dev, "pcmcia_socket%u", socket->sock); |
1da177e4 LT |
213 | |
214 | /* base address = 0, map = 0 */ | |
215 | socket->cis_mem.flags = 0; | |
216 | socket->cis_mem.speed = cis_speed; | |
217 | ||
218 | INIT_LIST_HEAD(&socket->cis_cache); | |
219 | ||
220 | init_completion(&socket->socket_released); | |
221 | init_completion(&socket->thread_done); | |
7fe908dd | 222 | mutex_init(&socket->skt_mutex); |
6b8e087b | 223 | mutex_init(&socket->ops_mutex); |
1da177e4 LT |
224 | spin_lock_init(&socket->thread_lock); |
225 | ||
b1769450 | 226 | if (socket->resource_ops->init) { |
cfe5d809 | 227 | mutex_lock(&socket->ops_mutex); |
b1769450 | 228 | ret = socket->resource_ops->init(socket); |
cfe5d809 | 229 | mutex_unlock(&socket->ops_mutex); |
b1769450 DB |
230 | if (ret) |
231 | goto err; | |
232 | } | |
233 | ||
1da9ab73 SH |
234 | tsk = kthread_run(pccardd, socket, "pccardd"); |
235 | if (IS_ERR(tsk)) { | |
236 | ret = PTR_ERR(tsk); | |
1da177e4 | 237 | goto err; |
1da9ab73 | 238 | } |
1da177e4 LT |
239 | |
240 | wait_for_completion(&socket->thread_done); | |
1da9ab73 | 241 | if (!socket->thread) { |
2e55bf6b DB |
242 | dev_printk(KERN_WARNING, &socket->dev, |
243 | "PCMCIA: warning: socket thread did not start\n"); | |
1da177e4 LT |
244 | return -EIO; |
245 | } | |
1da9ab73 | 246 | |
1da177e4 LT |
247 | pcmcia_parse_events(socket, SS_DETECT); |
248 | ||
638bba55 DB |
249 | /* |
250 | * Let's try to get the PCMCIA module for 16-bit PCMCIA support. | |
251 | * If it fails, it doesn't matter -- we still have 32-bit CardBus | |
252 | * support to offer, so this is not a failure mode. | |
253 | */ | |
254 | request_module_nowait("pcmcia"); | |
255 | ||
1da177e4 LT |
256 | return 0; |
257 | ||
258 | err: | |
259 | down_write(&pcmcia_socket_list_rwsem); | |
260 | list_del(&socket->socket_list); | |
261 | up_write(&pcmcia_socket_list_rwsem); | |
262 | return ret; | |
263 | } /* pcmcia_register_socket */ | |
264 | EXPORT_SYMBOL(pcmcia_register_socket); | |
265 | ||
266 | ||
267 | /** | |
268 | * pcmcia_unregister_socket - remove a pcmcia socket device | |
78187865 | 269 | * @socket: the &socket to unregister |
1da177e4 LT |
270 | */ |
271 | void pcmcia_unregister_socket(struct pcmcia_socket *socket) | |
272 | { | |
273 | if (!socket) | |
274 | return; | |
275 | ||
d50dbec3 | 276 | dev_dbg(&socket->dev, "pcmcia_unregister_socket(0x%p)\n", socket->ops); |
1da177e4 | 277 | |
0b402094 | 278 | if (socket->thread) |
1da9ab73 | 279 | kthread_stop(socket->thread); |
0b402094 | 280 | |
1da177e4 LT |
281 | /* remove from our own list */ |
282 | down_write(&pcmcia_socket_list_rwsem); | |
283 | list_del(&socket->socket_list); | |
284 | up_write(&pcmcia_socket_list_rwsem); | |
285 | ||
286 | /* wait for sysfs to drop all references */ | |
cfe5d809 DB |
287 | if (socket->resource_ops->exit) { |
288 | mutex_lock(&socket->ops_mutex); | |
385ee871 | 289 | socket->resource_ops->exit(socket); |
cfe5d809 DB |
290 | mutex_unlock(&socket->ops_mutex); |
291 | } | |
1da177e4 LT |
292 | wait_for_completion(&socket->socket_released); |
293 | } /* pcmcia_unregister_socket */ | |
294 | EXPORT_SYMBOL(pcmcia_unregister_socket); | |
295 | ||
296 | ||
9fea84f4 | 297 | struct pcmcia_socket *pcmcia_get_socket_by_nr(unsigned int nr) |
1da177e4 LT |
298 | { |
299 | struct pcmcia_socket *s; | |
300 | ||
301 | down_read(&pcmcia_socket_list_rwsem); | |
302 | list_for_each_entry(s, &pcmcia_socket_list, socket_list) | |
303 | if (s->sock == nr) { | |
304 | up_read(&pcmcia_socket_list_rwsem); | |
305 | return s; | |
306 | } | |
307 | up_read(&pcmcia_socket_list_rwsem); | |
308 | ||
309 | return NULL; | |
310 | ||
311 | } | |
312 | EXPORT_SYMBOL(pcmcia_get_socket_by_nr); | |
313 | ||
78187865 | 314 | /* |
33519ddd DB |
315 | * The central event handler. Send_event() sends an event to the |
316 | * 16-bit subsystem, which then calls the relevant device drivers. | |
317 | * Parse_events() interprets the event bits from | |
318 | * a card status change report. Do_shutdown() handles the high | |
319 | * priority stuff associated with a card removal. | |
320 | */ | |
1da177e4 LT |
321 | |
322 | /* NOTE: send_event needs to be called with skt->sem held. */ | |
323 | ||
324 | static int send_event(struct pcmcia_socket *s, event_t event, int priority) | |
325 | { | |
326 | int ret; | |
327 | ||
88b060d6 | 328 | if ((s->state & SOCKET_CARDBUS) && (event != CS_EVENT_CARD_REMOVAL)) |
1da177e4 LT |
329 | return 0; |
330 | ||
d50dbec3 | 331 | dev_dbg(&s->dev, "send_event(event %d, pri %d, callback 0x%p)\n", |
1da177e4 LT |
332 | event, priority, s->callback); |
333 | ||
334 | if (!s->callback) | |
335 | return 0; | |
336 | if (!try_module_get(s->callback->owner)) | |
337 | return 0; | |
338 | ||
339 | ret = s->callback->event(s, event, priority); | |
340 | ||
341 | module_put(s->callback->owner); | |
342 | ||
343 | return ret; | |
344 | } | |
345 | ||
1da177e4 LT |
346 | static int socket_reset(struct pcmcia_socket *skt) |
347 | { | |
348 | int status, i; | |
349 | ||
d50dbec3 | 350 | dev_dbg(&skt->dev, "reset\n"); |
1da177e4 LT |
351 | |
352 | skt->socket.flags |= SS_OUTPUT_ENA | SS_RESET; | |
353 | skt->ops->set_socket(skt, &skt->socket); | |
354 | udelay((long)reset_time); | |
355 | ||
356 | skt->socket.flags &= ~SS_RESET; | |
357 | skt->ops->set_socket(skt, &skt->socket); | |
358 | ||
359 | msleep(unreset_delay * 10); | |
360 | for (i = 0; i < unreset_limit; i++) { | |
361 | skt->ops->get_status(skt, &status); | |
362 | ||
363 | if (!(status & SS_DETECT)) | |
3939c1ef | 364 | return -ENODEV; |
1da177e4 LT |
365 | |
366 | if (status & SS_READY) | |
4c89e88b | 367 | return 0; |
1da177e4 LT |
368 | |
369 | msleep(unreset_check * 10); | |
370 | } | |
371 | ||
d50dbec3 | 372 | dev_printk(KERN_ERR, &skt->dev, "time out after reset.\n"); |
8567142e | 373 | return -ETIMEDOUT; |
1da177e4 LT |
374 | } |
375 | ||
78187865 | 376 | /* |
6e493882 DR |
377 | * socket_setup() and socket_shutdown() are called by the main event handler |
378 | * when card insertion and removal events are received. | |
379 | * socket_setup() turns on socket power and resets the socket, in two stages. | |
380 | * socket_shutdown() unconfigures a socket and turns off socket power. | |
381 | */ | |
382 | static void socket_shutdown(struct pcmcia_socket *s) | |
383 | { | |
384 | int status; | |
385 | ||
d50dbec3 | 386 | dev_dbg(&s->dev, "shutdown\n"); |
6e493882 | 387 | |
88b060d6 | 388 | send_event(s, CS_EVENT_CARD_REMOVAL, CS_EVENT_PRI_HIGH); |
9e86749c DB |
389 | |
390 | mutex_lock(&s->ops_mutex); | |
6e493882 DR |
391 | s->state &= SOCKET_INUSE | SOCKET_PRESENT; |
392 | msleep(shutdown_delay * 10); | |
393 | s->state &= SOCKET_INUSE; | |
394 | ||
395 | /* Blank out the socket state */ | |
396 | s->socket = dead_socket; | |
397 | s->ops->init(s); | |
398 | s->ops->set_socket(s, &s->socket); | |
399 | s->irq.AssignedIRQ = s->irq.Config = 0; | |
400 | s->lock_count = 0; | |
904e3777 DB |
401 | kfree(s->fake_cis); |
402 | s->fake_cis = NULL; | |
c3bfc96e DB |
403 | s->functions = 0; |
404 | ||
405 | /* From here on we can be sure that only we (that is, the | |
406 | * pccardd thread) accesses this socket, and all (16-bit) | |
407 | * PCMCIA interactions are gone. Therefore, release | |
408 | * ops_mutex so that we don't get a sysfs-related lockdep | |
409 | * warning. | |
410 | */ | |
411 | mutex_unlock(&s->ops_mutex); | |
412 | ||
6e493882 DR |
413 | #ifdef CONFIG_CARDBUS |
414 | cb_free(s); | |
415 | #endif | |
6e493882 | 416 | |
afb2c165 DR |
417 | /* give socket some time to power down */ |
418 | msleep(100); | |
419 | ||
6e493882 DR |
420 | s->ops->get_status(s, &status); |
421 | if (status & SS_POWERON) { | |
2e55bf6b DB |
422 | dev_printk(KERN_ERR, &s->dev, |
423 | "*** DANGER *** unable to remove socket power\n"); | |
6e493882 DR |
424 | } |
425 | ||
3970dd8c | 426 | s->state &= ~SOCKET_INUSE; |
6e493882 DR |
427 | } |
428 | ||
1da177e4 LT |
429 | static int socket_setup(struct pcmcia_socket *skt, int initial_delay) |
430 | { | |
431 | int status, i; | |
432 | ||
d50dbec3 | 433 | dev_dbg(&skt->dev, "setup\n"); |
1da177e4 LT |
434 | |
435 | skt->ops->get_status(skt, &status); | |
436 | if (!(status & SS_DETECT)) | |
3939c1ef | 437 | return -ENODEV; |
1da177e4 LT |
438 | |
439 | msleep(initial_delay * 10); | |
440 | ||
441 | for (i = 0; i < 100; i++) { | |
442 | skt->ops->get_status(skt, &status); | |
443 | if (!(status & SS_DETECT)) | |
3939c1ef | 444 | return -ENODEV; |
1da177e4 LT |
445 | |
446 | if (!(status & SS_PENDING)) | |
447 | break; | |
448 | ||
449 | msleep(100); | |
450 | } | |
451 | ||
452 | if (status & SS_PENDING) { | |
d50dbec3 DB |
453 | dev_printk(KERN_ERR, &skt->dev, |
454 | "voltage interrogation timed out.\n"); | |
8567142e | 455 | return -ETIMEDOUT; |
1da177e4 LT |
456 | } |
457 | ||
458 | if (status & SS_CARDBUS) { | |
5bc6b68a | 459 | if (!(skt->features & SS_CAP_CARDBUS)) { |
d50dbec3 DB |
460 | dev_printk(KERN_ERR, &skt->dev, |
461 | "cardbus cards are not supported.\n"); | |
610e2374 | 462 | return -EINVAL; |
5bc6b68a | 463 | } |
1da177e4 | 464 | skt->state |= SOCKET_CARDBUS; |
88b060d6 DB |
465 | } else |
466 | skt->state &= ~SOCKET_CARDBUS; | |
1da177e4 LT |
467 | |
468 | /* | |
469 | * Decode the card voltage requirements, and apply power to the card. | |
470 | */ | |
471 | if (status & SS_3VCARD) | |
472 | skt->socket.Vcc = skt->socket.Vpp = 33; | |
473 | else if (!(status & SS_XVCARD)) | |
474 | skt->socket.Vcc = skt->socket.Vpp = 50; | |
475 | else { | |
d50dbec3 | 476 | dev_printk(KERN_ERR, &skt->dev, "unsupported voltage key.\n"); |
610e2374 | 477 | return -EIO; |
1da177e4 | 478 | } |
fa912bcb DR |
479 | |
480 | if (skt->power_hook) | |
481 | skt->power_hook(skt, HOOK_POWER_PRE); | |
482 | ||
1da177e4 LT |
483 | skt->socket.flags = 0; |
484 | skt->ops->set_socket(skt, &skt->socket); | |
485 | ||
486 | /* | |
487 | * Wait "vcc_settle" for the supply to stabilise. | |
488 | */ | |
489 | msleep(vcc_settle * 10); | |
490 | ||
491 | skt->ops->get_status(skt, &status); | |
492 | if (!(status & SS_POWERON)) { | |
d50dbec3 | 493 | dev_printk(KERN_ERR, &skt->dev, "unable to apply power.\n"); |
610e2374 | 494 | return -EIO; |
1da177e4 LT |
495 | } |
496 | ||
fa912bcb DR |
497 | status = socket_reset(skt); |
498 | ||
499 | if (skt->power_hook) | |
500 | skt->power_hook(skt, HOOK_POWER_POST); | |
501 | ||
502 | return status; | |
1da177e4 LT |
503 | } |
504 | ||
505 | /* | |
506 | * Handle card insertion. Setup the socket, reset the card, | |
507 | * and then tell the rest of PCMCIA that a card is present. | |
508 | */ | |
509 | static int socket_insert(struct pcmcia_socket *skt) | |
510 | { | |
511 | int ret; | |
512 | ||
d50dbec3 | 513 | dev_dbg(&skt->dev, "insert\n"); |
1da177e4 | 514 | |
9e86749c | 515 | mutex_lock(&skt->ops_mutex); |
f971dbd5 DB |
516 | if (skt->state & SOCKET_INUSE) { |
517 | mutex_unlock(&skt->ops_mutex); | |
518 | return -EINVAL; | |
519 | } | |
3970dd8c | 520 | skt->state |= SOCKET_INUSE; |
1da177e4 LT |
521 | |
522 | ret = socket_setup(skt, setup_delay); | |
4c89e88b | 523 | if (ret == 0) { |
1da177e4 | 524 | skt->state |= SOCKET_PRESENT; |
807277cb | 525 | |
2e55bf6b DB |
526 | dev_printk(KERN_NOTICE, &skt->dev, |
527 | "pccard: %s card inserted into slot %d\n", | |
528 | (skt->state & SOCKET_CARDBUS) ? "CardBus" : "PCMCIA", | |
529 | skt->sock); | |
807277cb | 530 | |
1da177e4 LT |
531 | #ifdef CONFIG_CARDBUS |
532 | if (skt->state & SOCKET_CARDBUS) { | |
533 | cb_alloc(skt); | |
534 | skt->state |= SOCKET_CARDBUS_CONFIG; | |
535 | } | |
536 | #endif | |
d50dbec3 | 537 | dev_dbg(&skt->dev, "insert done\n"); |
9e86749c | 538 | mutex_unlock(&skt->ops_mutex); |
1da177e4 LT |
539 | |
540 | send_event(skt, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
541 | } else { | |
9e86749c | 542 | mutex_unlock(&skt->ops_mutex); |
1da177e4 | 543 | socket_shutdown(skt); |
1da177e4 LT |
544 | } |
545 | ||
546 | return ret; | |
547 | } | |
548 | ||
549 | static int socket_suspend(struct pcmcia_socket *skt) | |
550 | { | |
551 | if (skt->state & SOCKET_SUSPEND) | |
f958095e | 552 | return -EBUSY; |
1da177e4 | 553 | |
9e86749c | 554 | mutex_lock(&skt->ops_mutex); |
88b060d6 DB |
555 | skt->suspended_state = skt->state; |
556 | ||
1da177e4 LT |
557 | send_event(skt, CS_EVENT_PM_SUSPEND, CS_EVENT_PRI_LOW); |
558 | skt->socket = dead_socket; | |
559 | skt->ops->set_socket(skt, &skt->socket); | |
560 | if (skt->ops->suspend) | |
561 | skt->ops->suspend(skt); | |
562 | skt->state |= SOCKET_SUSPEND; | |
9e86749c | 563 | mutex_unlock(&skt->ops_mutex); |
4c89e88b | 564 | return 0; |
1da177e4 LT |
565 | } |
566 | ||
9905d1b4 | 567 | static int socket_early_resume(struct pcmcia_socket *skt) |
1da177e4 | 568 | { |
9e86749c | 569 | mutex_lock(&skt->ops_mutex); |
1da177e4 LT |
570 | skt->socket = dead_socket; |
571 | skt->ops->init(skt); | |
572 | skt->ops->set_socket(skt, &skt->socket); | |
9905d1b4 RW |
573 | if (skt->state & SOCKET_PRESENT) |
574 | skt->resume_status = socket_setup(skt, resume_delay); | |
9e86749c | 575 | mutex_unlock(&skt->ops_mutex); |
9905d1b4 RW |
576 | return 0; |
577 | } | |
1da177e4 | 578 | |
9905d1b4 RW |
579 | static int socket_late_resume(struct pcmcia_socket *skt) |
580 | { | |
9e86749c | 581 | mutex_lock(&skt->ops_mutex); |
88b060d6 | 582 | skt->state &= ~SOCKET_SUSPEND; |
9e86749c | 583 | mutex_unlock(&skt->ops_mutex); |
88b060d6 DB |
584 | |
585 | if (!(skt->state & SOCKET_PRESENT)) | |
1da177e4 | 586 | return socket_insert(skt); |
88b060d6 DB |
587 | |
588 | if (skt->resume_status) { | |
589 | socket_shutdown(skt); | |
590 | return 0; | |
1da177e4 LT |
591 | } |
592 | ||
88b060d6 DB |
593 | if (skt->suspended_state != skt->state) { |
594 | dev_dbg(&skt->dev, | |
595 | "suspend state 0x%x != resume state 0x%x\n", | |
596 | skt->suspended_state, skt->state); | |
597 | ||
1da177e4 | 598 | socket_shutdown(skt); |
88b060d6 | 599 | return socket_insert(skt); |
1da177e4 LT |
600 | } |
601 | ||
88b060d6 DB |
602 | #ifdef CONFIG_CARDBUS |
603 | if (skt->state & SOCKET_CARDBUS) { | |
604 | /* We can't be sure the CardBus card is the same | |
605 | * as the one previously inserted. Therefore, remove | |
606 | * and re-add... */ | |
607 | cb_free(skt); | |
608 | cb_alloc(skt); | |
609 | return 0; | |
610 | } | |
611 | #endif | |
1da177e4 | 612 | |
88b060d6 | 613 | send_event(skt, CS_EVENT_PM_RESUME, CS_EVENT_PRI_LOW); |
4c89e88b | 614 | return 0; |
1da177e4 LT |
615 | } |
616 | ||
9905d1b4 RW |
617 | /* |
618 | * Resume a socket. If a card is present, verify its CIS against | |
619 | * our cached copy. If they are different, the card has been | |
620 | * replaced, and we need to tell the drivers. | |
621 | */ | |
622 | static int socket_resume(struct pcmcia_socket *skt) | |
623 | { | |
624 | if (!(skt->state & SOCKET_SUSPEND)) | |
625 | return -EBUSY; | |
626 | ||
627 | socket_early_resume(skt); | |
628 | return socket_late_resume(skt); | |
629 | } | |
630 | ||
1da177e4 LT |
631 | static void socket_remove(struct pcmcia_socket *skt) |
632 | { | |
2e55bf6b DB |
633 | dev_printk(KERN_NOTICE, &skt->dev, |
634 | "pccard: card ejected from slot %d\n", skt->sock); | |
1da177e4 | 635 | socket_shutdown(skt); |
1da177e4 LT |
636 | } |
637 | ||
638 | /* | |
639 | * Process a socket card detect status change. | |
640 | * | |
641 | * If we don't have a card already present, delay the detect event for | |
642 | * about 20ms (to be on the safe side) before reading the socket status. | |
643 | * | |
644 | * Some i82365-based systems send multiple SS_DETECT events during card | |
645 | * insertion, and the "card present" status bit seems to bounce. This | |
646 | * will probably be true with GPIO-based card detection systems after | |
647 | * the product has aged. | |
648 | */ | |
649 | static void socket_detect_change(struct pcmcia_socket *skt) | |
650 | { | |
651 | if (!(skt->state & SOCKET_SUSPEND)) { | |
652 | int status; | |
653 | ||
654 | if (!(skt->state & SOCKET_PRESENT)) | |
655 | msleep(20); | |
656 | ||
657 | skt->ops->get_status(skt, &status); | |
658 | if ((skt->state & SOCKET_PRESENT) && | |
659 | !(status & SS_DETECT)) | |
660 | socket_remove(skt); | |
661 | if (!(skt->state & SOCKET_PRESENT) && | |
662 | (status & SS_DETECT)) | |
663 | socket_insert(skt); | |
664 | } | |
665 | } | |
666 | ||
667 | static int pccardd(void *__skt) | |
668 | { | |
669 | struct pcmcia_socket *skt = __skt; | |
1da177e4 LT |
670 | int ret; |
671 | ||
1da177e4 LT |
672 | skt->thread = current; |
673 | skt->socket = dead_socket; | |
674 | skt->ops->init(skt); | |
675 | skt->ops->set_socket(skt, &skt->socket); | |
676 | ||
677 | /* register with the device core */ | |
87373318 | 678 | ret = device_register(&skt->dev); |
1da177e4 | 679 | if (ret) { |
2e55bf6b DB |
680 | dev_printk(KERN_WARNING, &skt->dev, |
681 | "PCMCIA: unable to register socket\n"); | |
1da177e4 | 682 | skt->thread = NULL; |
1da9ab73 SH |
683 | complete(&skt->thread_done); |
684 | return 0; | |
1da177e4 | 685 | } |
4356d73d DB |
686 | ret = pccard_sysfs_add_socket(&skt->dev); |
687 | if (ret) | |
688 | dev_warn(&skt->dev, "err %d adding socket attributes\n", ret); | |
1da177e4 | 689 | |
bf4de6f2 DR |
690 | complete(&skt->thread_done); |
691 | ||
83144186 | 692 | set_freezable(); |
1da177e4 LT |
693 | for (;;) { |
694 | unsigned long flags; | |
695 | unsigned int events; | |
f971dbd5 | 696 | unsigned int sysfs_events; |
1da177e4 LT |
697 | |
698 | set_current_state(TASK_INTERRUPTIBLE); | |
699 | ||
700 | spin_lock_irqsave(&skt->thread_lock, flags); | |
701 | events = skt->thread_events; | |
702 | skt->thread_events = 0; | |
f971dbd5 DB |
703 | sysfs_events = skt->sysfs_events; |
704 | skt->sysfs_events = 0; | |
1da177e4 LT |
705 | spin_unlock_irqrestore(&skt->thread_lock, flags); |
706 | ||
f971dbd5 | 707 | mutex_lock(&skt->skt_mutex); |
1da177e4 | 708 | if (events) { |
1da177e4 LT |
709 | if (events & SS_DETECT) |
710 | socket_detect_change(skt); | |
711 | if (events & SS_BATDEAD) | |
712 | send_event(skt, CS_EVENT_BATTERY_DEAD, CS_EVENT_PRI_LOW); | |
713 | if (events & SS_BATWARN) | |
714 | send_event(skt, CS_EVENT_BATTERY_LOW, CS_EVENT_PRI_LOW); | |
715 | if (events & SS_READY) | |
716 | send_event(skt, CS_EVENT_READY_CHANGE, CS_EVENT_PRI_LOW); | |
1da177e4 LT |
717 | } |
718 | ||
f971dbd5 DB |
719 | if (sysfs_events) { |
720 | if (sysfs_events & PCMCIA_UEVENT_EJECT) | |
721 | socket_remove(skt); | |
722 | if (sysfs_events & PCMCIA_UEVENT_INSERT) | |
723 | socket_insert(skt); | |
724 | if ((sysfs_events & PCMCIA_UEVENT_RESUME) && | |
725 | !(skt->state & SOCKET_CARDBUS)) { | |
726 | ret = socket_resume(skt); | |
727 | if (!ret && skt->callback) | |
728 | skt->callback->resume(skt); | |
729 | } | |
730 | if ((sysfs_events & PCMCIA_UEVENT_SUSPEND) && | |
731 | !(skt->state & SOCKET_CARDBUS)) { | |
732 | if (skt->callback) | |
733 | ret = skt->callback->suspend(skt); | |
734 | else | |
735 | ret = 0; | |
736 | if (!ret) | |
737 | socket_suspend(skt); | |
738 | } | |
af461fc1 DB |
739 | if ((sysfs_events & PCMCIA_UEVENT_REQUERY) && |
740 | !(skt->state & SOCKET_CARDBUS)) { | |
741 | if (!ret && skt->callback) | |
742 | skt->callback->requery(skt); | |
743 | } | |
f971dbd5 DB |
744 | } |
745 | mutex_unlock(&skt->skt_mutex); | |
746 | ||
747 | if (events || sysfs_events) | |
748 | continue; | |
749 | ||
1da9ab73 | 750 | if (kthread_should_stop()) |
1da177e4 | 751 | break; |
bf4de6f2 DR |
752 | |
753 | schedule(); | |
754 | try_to_freeze(); | |
1da177e4 | 755 | } |
220ec029 SR |
756 | /* make sure we are running before we exit */ |
757 | set_current_state(TASK_RUNNING); | |
758 | ||
3970dd8c DB |
759 | /* shut down socket, if a device is still present */ |
760 | if (skt->state & SOCKET_PRESENT) { | |
761 | mutex_lock(&skt->skt_mutex); | |
762 | socket_remove(skt); | |
763 | mutex_unlock(&skt->skt_mutex); | |
764 | } | |
765 | ||
1da177e4 | 766 | /* remove from the device core */ |
4356d73d | 767 | pccard_sysfs_remove_socket(&skt->dev); |
87373318 | 768 | device_unregister(&skt->dev); |
1da177e4 | 769 | |
1da9ab73 | 770 | return 0; |
1da177e4 LT |
771 | } |
772 | ||
773 | /* | |
774 | * Yenta (at least) probes interrupts before registering the socket and | |
775 | * starting the handler thread. | |
776 | */ | |
777 | void pcmcia_parse_events(struct pcmcia_socket *s, u_int events) | |
778 | { | |
4b7a89a3 | 779 | unsigned long flags; |
d50dbec3 | 780 | dev_dbg(&s->dev, "parse_events: events %08x\n", events); |
1da177e4 | 781 | if (s->thread) { |
4b7a89a3 | 782 | spin_lock_irqsave(&s->thread_lock, flags); |
1da177e4 | 783 | s->thread_events |= events; |
4b7a89a3 | 784 | spin_unlock_irqrestore(&s->thread_lock, flags); |
1da177e4 | 785 | |
0b402094 | 786 | wake_up_process(s->thread); |
1da177e4 LT |
787 | } |
788 | } /* pcmcia_parse_events */ | |
33519ddd | 789 | EXPORT_SYMBOL(pcmcia_parse_events); |
1da177e4 | 790 | |
f971dbd5 DB |
791 | /** |
792 | * pcmcia_parse_uevents() - tell pccardd to issue manual commands | |
793 | * @s: the PCMCIA socket we wan't to command | |
794 | * @events: events to pass to pccardd | |
795 | * | |
796 | * userspace-issued insert, eject, suspend and resume commands must be | |
797 | * handled by pccardd to avoid any sysfs-related deadlocks. Valid events | |
798 | * are PCMCIA_UEVENT_EJECT (for eject), PCMCIA_UEVENT__INSERT (for insert), | |
af461fc1 DB |
799 | * PCMCIA_UEVENT_RESUME (for resume), PCMCIA_UEVENT_SUSPEND (for suspend) |
800 | * and PCMCIA_UEVENT_REQUERY (for re-querying the PCMCIA card). | |
f971dbd5 DB |
801 | */ |
802 | void pcmcia_parse_uevents(struct pcmcia_socket *s, u_int events) | |
803 | { | |
804 | unsigned long flags; | |
805 | dev_dbg(&s->dev, "parse_uevents: events %08x\n", events); | |
806 | if (s->thread) { | |
807 | spin_lock_irqsave(&s->thread_lock, flags); | |
808 | s->sysfs_events |= events; | |
809 | spin_unlock_irqrestore(&s->thread_lock, flags); | |
810 | ||
811 | wake_up_process(s->thread); | |
812 | } | |
813 | } | |
814 | EXPORT_SYMBOL(pcmcia_parse_uevents); | |
815 | ||
1da177e4 LT |
816 | |
817 | /* register pcmcia_callback */ | |
818 | int pccard_register_pcmcia(struct pcmcia_socket *s, struct pcmcia_callback *c) | |
819 | { | |
9fea84f4 | 820 | int ret = 0; |
1da177e4 | 821 | |
7fe908dd DB |
822 | /* s->skt_mutex also protects s->callback */ |
823 | mutex_lock(&s->skt_mutex); | |
1da177e4 LT |
824 | |
825 | if (c) { | |
826 | /* registration */ | |
827 | if (s->callback) { | |
828 | ret = -EBUSY; | |
829 | goto err; | |
830 | } | |
831 | ||
832 | s->callback = c; | |
833 | ||
834 | if ((s->state & (SOCKET_PRESENT|SOCKET_CARDBUS)) == SOCKET_PRESENT) | |
835 | send_event(s, CS_EVENT_CARD_INSERTION, CS_EVENT_PRI_LOW); | |
836 | } else | |
837 | s->callback = NULL; | |
838 | err: | |
7fe908dd | 839 | mutex_unlock(&s->skt_mutex); |
1da177e4 LT |
840 | |
841 | return ret; | |
842 | } | |
843 | EXPORT_SYMBOL(pccard_register_pcmcia); | |
844 | ||
1da177e4 | 845 | |
33519ddd DB |
846 | /* I'm not sure which "reset" function this is supposed to use, |
847 | * but for now, it uses the low-level interface's reset, not the | |
848 | * CIS register. | |
849 | */ | |
1da177e4 | 850 | |
994917f8 | 851 | int pcmcia_reset_card(struct pcmcia_socket *skt) |
1da177e4 LT |
852 | { |
853 | int ret; | |
33519ddd | 854 | |
d50dbec3 | 855 | dev_dbg(&skt->dev, "resetting socket\n"); |
1da177e4 | 856 | |
7fe908dd | 857 | mutex_lock(&skt->skt_mutex); |
1da177e4 LT |
858 | do { |
859 | if (!(skt->state & SOCKET_PRESENT)) { | |
6d9a299f | 860 | dev_dbg(&skt->dev, "can't reset, not present\n"); |
3939c1ef | 861 | ret = -ENODEV; |
1da177e4 LT |
862 | break; |
863 | } | |
864 | if (skt->state & SOCKET_SUSPEND) { | |
6d9a299f | 865 | dev_dbg(&skt->dev, "can't reset, suspended\n"); |
f958095e | 866 | ret = -EBUSY; |
1da177e4 LT |
867 | break; |
868 | } | |
869 | if (skt->state & SOCKET_CARDBUS) { | |
6d9a299f | 870 | dev_dbg(&skt->dev, "can't reset, is cardbus\n"); |
de6405e9 | 871 | ret = -EPERM; |
1da177e4 LT |
872 | break; |
873 | } | |
874 | ||
875 | ret = send_event(skt, CS_EVENT_RESET_REQUEST, CS_EVENT_PRI_LOW); | |
876 | if (ret == 0) { | |
877 | send_event(skt, CS_EVENT_RESET_PHYSICAL, CS_EVENT_PRI_LOW); | |
8e9e793d DB |
878 | if (skt->callback) |
879 | skt->callback->suspend(skt); | |
9e86749c DB |
880 | mutex_lock(&skt->ops_mutex); |
881 | ret = socket_reset(skt); | |
882 | mutex_unlock(&skt->ops_mutex); | |
883 | if (ret == 0) { | |
1da177e4 | 884 | send_event(skt, CS_EVENT_CARD_RESET, CS_EVENT_PRI_LOW); |
8e9e793d DB |
885 | if (skt->callback) |
886 | skt->callback->resume(skt); | |
887 | } | |
1da177e4 LT |
888 | } |
889 | ||
4c89e88b | 890 | ret = 0; |
1da177e4 | 891 | } while (0); |
7fe908dd | 892 | mutex_unlock(&skt->skt_mutex); |
1da177e4 LT |
893 | |
894 | return ret; | |
895 | } /* reset_card */ | |
994917f8 | 896 | EXPORT_SYMBOL(pcmcia_reset_card); |
1da177e4 | 897 | |
1da177e4 | 898 | |
7eff2e7a KS |
899 | static int pcmcia_socket_uevent(struct device *dev, |
900 | struct kobj_uevent_env *env) | |
3ee13937 DB |
901 | { |
902 | struct pcmcia_socket *s = container_of(dev, struct pcmcia_socket, dev); | |
3ee13937 | 903 | |
7eff2e7a | 904 | if (add_uevent_var(env, "SOCKET_NO=%u", s->sock)) |
3ee13937 DB |
905 | return -ENOMEM; |
906 | ||
3ee13937 DB |
907 | return 0; |
908 | } | |
909 | ||
1da177e4 | 910 | |
378a33a6 DB |
911 | static struct completion pcmcia_unload; |
912 | ||
913 | static void pcmcia_release_socket_class(struct class *data) | |
914 | { | |
915 | complete(&pcmcia_unload); | |
916 | } | |
917 | ||
918 | ||
1da177e4 LT |
919 | struct class pcmcia_socket_class = { |
920 | .name = "pcmcia_socket", | |
87373318 GKH |
921 | .dev_uevent = pcmcia_socket_uevent, |
922 | .dev_release = pcmcia_release_socket, | |
378a33a6 | 923 | .class_release = pcmcia_release_socket_class, |
1da177e4 LT |
924 | }; |
925 | EXPORT_SYMBOL(pcmcia_socket_class); | |
926 | ||
927 | ||
928 | static int __init init_pcmcia_cs(void) | |
929 | { | |
378a33a6 | 930 | init_completion(&pcmcia_unload); |
4356d73d | 931 | return class_register(&pcmcia_socket_class); |
1da177e4 LT |
932 | } |
933 | ||
934 | static void __exit exit_pcmcia_cs(void) | |
935 | { | |
33519ddd | 936 | class_unregister(&pcmcia_socket_class); |
378a33a6 | 937 | wait_for_completion(&pcmcia_unload); |
1da177e4 LT |
938 | } |
939 | ||
940 | subsys_initcall(init_pcmcia_cs); | |
941 | module_exit(exit_pcmcia_cs); | |
942 |