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Merge branch 'akpm'
[linux-2.6/next.git] / drivers / pcmcia / soc_common.c
bloba0a9c2aa8d78a5a02aae23065b6e2a51ccec7621
1 /*======================================================================
2
3 Common support code for the PCMCIA control functionality of
4 integrated SOCs like the SA-11x0 and PXA2xx microprocessors.
5
6 The contents of this file are subject to the Mozilla Public
7 License Version 1.1 (the "License"); you may not use this file
8 except in compliance with the License. You may obtain a copy of
9 the License at http://www.mozilla.org/MPL/
10
11 Software distributed under the License is distributed on an "AS
12 IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
13 implied. See the License for the specific language governing
14 rights and limitations under the License.
15
16 The initial developer of the original code is John G. Dorsey
17 <john+@cs.cmu.edu>. Portions created by John G. Dorsey are
18 Copyright (C) 1999 John G. Dorsey. All Rights Reserved.
19
20 Alternatively, the contents of this file may be used under the
21 terms of the GNU Public License version 2 (the "GPL"), in which
22 case the provisions of the GPL are applicable instead of the
23 above. If you wish to allow the use of your version of this file
24 only under the terms of the GPL and not to allow others to use
25 your version of this file under the MPL, indicate your decision
26 by deleting the provisions above and replace them with the notice
27 and other provisions required by the GPL. If you do not delete
28 the provisions above, a recipient may use your version of this
29 file under either the MPL or the GPL.
30
31 ======================================================================*/
32
33
34 #include <linux/cpufreq.h>
35 #include <linux/init.h>
36 #include <linux/interrupt.h>
37 #include <linux/io.h>
38 #include <linux/irq.h>
39 #include <linux/kernel.h>
40 #include <linux/mm.h>
41 #include <linux/module.h>
42 #include <linux/moduleparam.h>
43 #include <linux/mutex.h>
44 #include <linux/spinlock.h>
45 #include <linux/timer.h>
46
47 #include <mach/hardware.h>
48 #include <asm/system.h>
49
50 #include "soc_common.h"
51
52 #ifdef CONFIG_PCMCIA_DEBUG
53
54 static int pc_debug;
55 module_param(pc_debug, int, 0644);
56
57 void soc_pcmcia_debug(struct soc_pcmcia_socket *skt, const char *func,
58 int lvl, const char *fmt, ...)
59 {
60 struct va_format vaf;
61 va_list args;
62 if (pc_debug > lvl) {
63 va_start(args, fmt);
64
65 vaf.fmt = fmt;
66 vaf.va = &args;
67
68 printk(KERN_DEBUG "skt%u: %s: %pV", skt->nr, func, &vaf);
69
70 va_end(args);
71 }
72 }
73 EXPORT_SYMBOL(soc_pcmcia_debug);
74
75 #endif
76
77 #define to_soc_pcmcia_socket(x) \
78 container_of(x, struct soc_pcmcia_socket, socket)
79
80 static unsigned short
81 calc_speed(unsigned short *spds, int num, unsigned short dflt)
82 {
83 unsigned short speed = 0;
84 int i;
85
86 for (i = 0; i < num; i++)
87 if (speed < spds[i])
88 speed = spds[i];
89 if (speed == 0)
90 speed = dflt;
91
92 return speed;
93 }
94
95 void soc_common_pcmcia_get_timing(struct soc_pcmcia_socket *skt,
96 struct soc_pcmcia_timing *timing)
97 {
98 timing->io =
99 calc_speed(skt->spd_io, MAX_IO_WIN, SOC_PCMCIA_IO_ACCESS);
100 timing->mem =
101 calc_speed(skt->spd_mem, MAX_WIN, SOC_PCMCIA_3V_MEM_ACCESS);
102 timing->attr =
103 calc_speed(skt->spd_attr, MAX_WIN, SOC_PCMCIA_3V_MEM_ACCESS);
104 }
105 EXPORT_SYMBOL(soc_common_pcmcia_get_timing);
106
107 static unsigned int soc_common_pcmcia_skt_state(struct soc_pcmcia_socket *skt)
108 {
109 struct pcmcia_state state;
110 unsigned int stat;
111
112 memset(&state, 0, sizeof(struct pcmcia_state));
113
114 skt->ops->socket_state(skt, &state);
115
116 stat = state.detect ? SS_DETECT : 0;
117 stat |= state.ready ? SS_READY : 0;
118 stat |= state.wrprot ? SS_WRPROT : 0;
119 stat |= state.vs_3v ? SS_3VCARD : 0;
120 stat |= state.vs_Xv ? SS_XVCARD : 0;
121
122 /* The power status of individual sockets is not available
123 * explicitly from the hardware, so we just remember the state
124 * and regurgitate it upon request:
125 */
126 stat |= skt->cs_state.Vcc ? SS_POWERON : 0;
127
128 if (skt->cs_state.flags & SS_IOCARD)
129 stat |= state.bvd1 ? SS_STSCHG : 0;
130 else {
131 if (state.bvd1 == 0)
132 stat |= SS_BATDEAD;
133 else if (state.bvd2 == 0)
134 stat |= SS_BATWARN;
135 }
136 return stat;
137 }
138
139 /*
140 * soc_common_pcmcia_config_skt
141 * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
142 *
143 * Convert PCMCIA socket state to our socket configure structure.
144 */
145 static int soc_common_pcmcia_config_skt(
146 struct soc_pcmcia_socket *skt, socket_state_t *state)
147 {
148 int ret;
149
150 ret = skt->ops->configure_socket(skt, state);
151 if (ret == 0) {
152 /*
153 * This really needs a better solution. The IRQ
154 * may or may not be claimed by the driver.
155 */
156 if (skt->irq_state != 1 && state->io_irq) {
157 skt->irq_state = 1;
158 irq_set_irq_type(skt->socket.pci_irq,
159 IRQ_TYPE_EDGE_FALLING);
160 } else if (skt->irq_state == 1 && state->io_irq == 0) {
161 skt->irq_state = 0;
162 irq_set_irq_type(skt->socket.pci_irq, IRQ_TYPE_NONE);
163 }
164
165 skt->cs_state = *state;
166 }
167
168 if (ret < 0)
169 printk(KERN_ERR "soc_common_pcmcia: unable to configure "
170 "socket %d\n", skt->nr);
171
172 return ret;
173 }
174
175 /* soc_common_pcmcia_sock_init()
176 * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
177 *
178 * (Re-)Initialise the socket, turning on status interrupts
179 * and PCMCIA bus. This must wait for power to stabilise
180 * so that the card status signals report correctly.
181 *
182 * Returns: 0
183 */
184 static int soc_common_pcmcia_sock_init(struct pcmcia_socket *sock)
185 {
186 struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock);
187
188 debug(skt, 2, "initializing socket\n");
189 if (skt->ops->socket_init)
190 skt->ops->socket_init(skt);
191 return 0;
192 }
193
194
195 /*
196 * soc_common_pcmcia_suspend()
197 * ^^^^^^^^^^^^^^^^^^^^^^^^^^^
198 *
199 * Remove power on the socket, disable IRQs from the card.
200 * Turn off status interrupts, and disable the PCMCIA bus.
201 *
202 * Returns: 0
203 */
204 static int soc_common_pcmcia_suspend(struct pcmcia_socket *sock)
205 {
206 struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock);
207
208 debug(skt, 2, "suspending socket\n");
209
210 if (skt->ops->socket_suspend)
211 skt->ops->socket_suspend(skt);
212
213 return 0;
214 }
215
216 static DEFINE_SPINLOCK(status_lock);
217
218 static void soc_common_check_status(struct soc_pcmcia_socket *skt)
219 {
220 unsigned int events;
221
222 debug(skt, 4, "entering PCMCIA monitoring thread\n");
223
224 do {
225 unsigned int status;
226 unsigned long flags;
227
228 status = soc_common_pcmcia_skt_state(skt);
229
230 spin_lock_irqsave(&status_lock, flags);
231 events = (status ^ skt->status) & skt->cs_state.csc_mask;
232 skt->status = status;
233 spin_unlock_irqrestore(&status_lock, flags);
234
235 debug(skt, 4, "events: %s%s%s%s%s%s\n",
236 events == 0 ? "<NONE>" : "",
237 events & SS_DETECT ? "DETECT " : "",
238 events & SS_READY ? "READY " : "",
239 events & SS_BATDEAD ? "BATDEAD " : "",
240 events & SS_BATWARN ? "BATWARN " : "",
241 events & SS_STSCHG ? "STSCHG " : "");
242
243 if (events)
244 pcmcia_parse_events(&skt->socket, events);
245 } while (events);
246 }
247
248 /* Let's poll for events in addition to IRQs since IRQ only is unreliable... */
249 static void soc_common_pcmcia_poll_event(unsigned long dummy)
250 {
251 struct soc_pcmcia_socket *skt = (struct soc_pcmcia_socket *)dummy;
252 debug(skt, 4, "polling for events\n");
253
254 mod_timer(&skt->poll_timer, jiffies + SOC_PCMCIA_POLL_PERIOD);
255
256 soc_common_check_status(skt);
257 }
258
259
260 /*
261 * Service routine for socket driver interrupts (requested by the
262 * low-level PCMCIA init() operation via soc_common_pcmcia_thread()).
263 * The actual interrupt-servicing work is performed by
264 * soc_common_pcmcia_thread(), largely because the Card Services event-
265 * handling code performs scheduling operations which cannot be
266 * executed from within an interrupt context.
267 */
268 static irqreturn_t soc_common_pcmcia_interrupt(int irq, void *dev)
269 {
270 struct soc_pcmcia_socket *skt = dev;
271
272 debug(skt, 3, "servicing IRQ %d\n", irq);
273
274 soc_common_check_status(skt);
275
276 return IRQ_HANDLED;
277 }
278
279
280 /*
281 * Implements the get_status() operation for the in-kernel PCMCIA
282 * service (formerly SS_GetStatus in Card Services). Essentially just
283 * fills in bits in `status' according to internal driver state or
284 * the value of the voltage detect chipselect register.
285 *
286 * As a debugging note, during card startup, the PCMCIA core issues
287 * three set_socket() commands in a row the first with RESET deasserted,
288 * the second with RESET asserted, and the last with RESET deasserted
289 * again. Following the third set_socket(), a get_status() command will
290 * be issued. The kernel is looking for the SS_READY flag (see
291 * setup_socket(), reset_socket(), and unreset_socket() in cs.c).
292 *
293 * Returns: 0
294 */
295 static int
296 soc_common_pcmcia_get_status(struct pcmcia_socket *sock, unsigned int *status)
297 {
298 struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock);
299
300 skt->status = soc_common_pcmcia_skt_state(skt);
301 *status = skt->status;
302
303 return 0;
304 }
305
306
307 /*
308 * Implements the set_socket() operation for the in-kernel PCMCIA
309 * service (formerly SS_SetSocket in Card Services). We more or
310 * less punt all of this work and let the kernel handle the details
311 * of power configuration, reset, &c. We also record the value of
312 * `state' in order to regurgitate it to the PCMCIA core later.
313 */
314 static int soc_common_pcmcia_set_socket(
315 struct pcmcia_socket *sock, socket_state_t *state)
316 {
317 struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock);
318
319 debug(skt, 2, "mask: %s%s%s%s%s%s flags: %s%s%s%s%s%s Vcc %d Vpp %d irq %d\n",
320 (state->csc_mask == 0) ? "<NONE> " : "",
321 (state->csc_mask & SS_DETECT) ? "DETECT " : "",
322 (state->csc_mask & SS_READY) ? "READY " : "",
323 (state->csc_mask & SS_BATDEAD) ? "BATDEAD " : "",
324 (state->csc_mask & SS_BATWARN) ? "BATWARN " : "",
325 (state->csc_mask & SS_STSCHG) ? "STSCHG " : "",
326 (state->flags == 0) ? "<NONE> " : "",
327 (state->flags & SS_PWR_AUTO) ? "PWR_AUTO " : "",
328 (state->flags & SS_IOCARD) ? "IOCARD " : "",
329 (state->flags & SS_RESET) ? "RESET " : "",
330 (state->flags & SS_SPKR_ENA) ? "SPKR_ENA " : "",
331 (state->flags & SS_OUTPUT_ENA) ? "OUTPUT_ENA " : "",
332 state->Vcc, state->Vpp, state->io_irq);
333
334 return soc_common_pcmcia_config_skt(skt, state);
335 }
336
337
338 /*
339 * Implements the set_io_map() operation for the in-kernel PCMCIA
340 * service (formerly SS_SetIOMap in Card Services). We configure
341 * the map speed as requested, but override the address ranges
342 * supplied by Card Services.
343 *
344 * Returns: 0 on success, -1 on error
345 */
346 static int soc_common_pcmcia_set_io_map(
347 struct pcmcia_socket *sock, struct pccard_io_map *map)
348 {
349 struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock);
350 unsigned short speed = map->speed;
351
352 debug(skt, 2, "map %u speed %u start 0x%08llx stop 0x%08llx\n",
353 map->map, map->speed, (unsigned long long)map->start,
354 (unsigned long long)map->stop);
355 debug(skt, 2, "flags: %s%s%s%s%s%s%s%s\n",
356 (map->flags == 0) ? "<NONE>" : "",
357 (map->flags & MAP_ACTIVE) ? "ACTIVE " : "",
358 (map->flags & MAP_16BIT) ? "16BIT " : "",
359 (map->flags & MAP_AUTOSZ) ? "AUTOSZ " : "",
360 (map->flags & MAP_0WS) ? "0WS " : "",
361 (map->flags & MAP_WRPROT) ? "WRPROT " : "",
362 (map->flags & MAP_USE_WAIT) ? "USE_WAIT " : "",
363 (map->flags & MAP_PREFETCH) ? "PREFETCH " : "");
364
365 if (map->map >= MAX_IO_WIN) {
366 printk(KERN_ERR "%s(): map (%d) out of range\n", __func__,
367 map->map);
368 return -1;
369 }
370
371 if (map->flags & MAP_ACTIVE) {
372 if (speed == 0)
373 speed = SOC_PCMCIA_IO_ACCESS;
374 } else {
375 speed = 0;
376 }
377
378 skt->spd_io[map->map] = speed;
379 skt->ops->set_timing(skt);
380
381 if (map->stop == 1)
382 map->stop = PAGE_SIZE-1;
383
384 map->stop -= map->start;
385 map->stop += skt->socket.io_offset;
386 map->start = skt->socket.io_offset;
387
388 return 0;
389 }
390
391
392 /*
393 * Implements the set_mem_map() operation for the in-kernel PCMCIA
394 * service (formerly SS_SetMemMap in Card Services). We configure
395 * the map speed as requested, but override the address ranges
396 * supplied by Card Services.
397 *
398 * Returns: 0 on success, -ERRNO on error
399 */
400 static int soc_common_pcmcia_set_mem_map(
401 struct pcmcia_socket *sock, struct pccard_mem_map *map)
402 {
403 struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock);
404 struct resource *res;
405 unsigned short speed = map->speed;
406
407 debug(skt, 2, "map %u speed %u card_start %08x\n",
408 map->map, map->speed, map->card_start);
409 debug(skt, 2, "flags: %s%s%s%s%s%s%s%s\n",
410 (map->flags == 0) ? "<NONE>" : "",
411 (map->flags & MAP_ACTIVE) ? "ACTIVE " : "",
412 (map->flags & MAP_16BIT) ? "16BIT " : "",
413 (map->flags & MAP_AUTOSZ) ? "AUTOSZ " : "",
414 (map->flags & MAP_0WS) ? "0WS " : "",
415 (map->flags & MAP_WRPROT) ? "WRPROT " : "",
416 (map->flags & MAP_ATTRIB) ? "ATTRIB " : "",
417 (map->flags & MAP_USE_WAIT) ? "USE_WAIT " : "");
418
419 if (map->map >= MAX_WIN)
420 return -EINVAL;
421
422 if (map->flags & MAP_ACTIVE) {
423 if (speed == 0)
424 speed = 300;
425 } else {
426 speed = 0;
427 }
428
429 if (map->flags & MAP_ATTRIB) {
430 res = &skt->res_attr;
431 skt->spd_attr[map->map] = speed;
432 skt->spd_mem[map->map] = 0;
433 } else {
434 res = &skt->res_mem;
435 skt->spd_attr[map->map] = 0;
436 skt->spd_mem[map->map] = speed;
437 }
438
439 skt->ops->set_timing(skt);
440
441 map->static_start = res->start + map->card_start;
442
443 return 0;
444 }
445
446 struct bittbl {
447 unsigned int mask;
448 const char *name;
449 };
450
451 static struct bittbl status_bits[] = {
452 { SS_WRPROT, "SS_WRPROT" },
453 { SS_BATDEAD, "SS_BATDEAD" },
454 { SS_BATWARN, "SS_BATWARN" },
455 { SS_READY, "SS_READY" },
456 { SS_DETECT, "SS_DETECT" },
457 { SS_POWERON, "SS_POWERON" },
458 { SS_STSCHG, "SS_STSCHG" },
459 { SS_3VCARD, "SS_3VCARD" },
460 { SS_XVCARD, "SS_XVCARD" },
461 };
462
463 static struct bittbl conf_bits[] = {
464 { SS_PWR_AUTO, "SS_PWR_AUTO" },
465 { SS_IOCARD, "SS_IOCARD" },
466 { SS_RESET, "SS_RESET" },
467 { SS_DMA_MODE, "SS_DMA_MODE" },
468 { SS_SPKR_ENA, "SS_SPKR_ENA" },
469 { SS_OUTPUT_ENA, "SS_OUTPUT_ENA" },
470 };
471
472 static void dump_bits(char **p, const char *prefix,
473 unsigned int val, struct bittbl *bits, int sz)
474 {
475 char *b = *p;
476 int i;
477
478 b += sprintf(b, "%-9s:", prefix);
479 for (i = 0; i < sz; i++)
480 if (val & bits[i].mask)
481 b += sprintf(b, " %s", bits[i].name);
482 *b++ = '\n';
483 *p = b;
484 }
485
486 /*
487 * Implements the /sys/class/pcmcia_socket/??/status file.
488 *
489 * Returns: the number of characters added to the buffer
490 */
491 static ssize_t show_status(
492 struct device *dev, struct device_attribute *attr, char *buf)
493 {
494 struct soc_pcmcia_socket *skt =
495 container_of(dev, struct soc_pcmcia_socket, socket.dev);
496 char *p = buf;
497
498 p += sprintf(p, "slot : %d\n", skt->nr);
499
500 dump_bits(&p, "status", skt->status,
501 status_bits, ARRAY_SIZE(status_bits));
502 dump_bits(&p, "csc_mask", skt->cs_state.csc_mask,
503 status_bits, ARRAY_SIZE(status_bits));
504 dump_bits(&p, "cs_flags", skt->cs_state.flags,
505 conf_bits, ARRAY_SIZE(conf_bits));
506
507 p += sprintf(p, "Vcc : %d\n", skt->cs_state.Vcc);
508 p += sprintf(p, "Vpp : %d\n", skt->cs_state.Vpp);
509 p += sprintf(p, "IRQ : %d (%d)\n", skt->cs_state.io_irq,
510 skt->socket.pci_irq);
511 if (skt->ops->show_timing)
512 p += skt->ops->show_timing(skt, p);
513
514 return p-buf;
515 }
516 static DEVICE_ATTR(status, S_IRUGO, show_status, NULL);
517
518
519 static struct pccard_operations soc_common_pcmcia_operations = {
520 .init = soc_common_pcmcia_sock_init,
521 .suspend = soc_common_pcmcia_suspend,
522 .get_status = soc_common_pcmcia_get_status,
523 .set_socket = soc_common_pcmcia_set_socket,
524 .set_io_map = soc_common_pcmcia_set_io_map,
525 .set_mem_map = soc_common_pcmcia_set_mem_map,
526 };
527
528
529 int soc_pcmcia_request_irqs(struct soc_pcmcia_socket *skt,
530 struct pcmcia_irqs *irqs, int nr)
531 {
532 int i, res = 0;
533
534 for (i = 0; i < nr; i++) {
535 if (irqs[i].sock != skt->nr)
536 continue;
537 res = request_irq(irqs[i].irq, soc_common_pcmcia_interrupt,
538 IRQF_DISABLED, irqs[i].str, skt);
539 if (res)
540 break;
541 irq_set_irq_type(irqs[i].irq, IRQ_TYPE_NONE);
542 }
543
544 if (res) {
545 printk(KERN_ERR "PCMCIA: request for IRQ%d failed (%d)\n",
546 irqs[i].irq, res);
547
548 while (i--)
549 if (irqs[i].sock == skt->nr)
550 free_irq(irqs[i].irq, skt);
551 }
552 return res;
553 }
554 EXPORT_SYMBOL(soc_pcmcia_request_irqs);
555
556 void soc_pcmcia_free_irqs(struct soc_pcmcia_socket *skt,
557 struct pcmcia_irqs *irqs, int nr)
558 {
559 int i;
560
561 for (i = 0; i < nr; i++)
562 if (irqs[i].sock == skt->nr)
563 free_irq(irqs[i].irq, skt);
564 }
565 EXPORT_SYMBOL(soc_pcmcia_free_irqs);
566
567 void soc_pcmcia_disable_irqs(struct soc_pcmcia_socket *skt,
568 struct pcmcia_irqs *irqs, int nr)
569 {
570 int i;
571
572 for (i = 0; i < nr; i++)
573 if (irqs[i].sock == skt->nr)
574 irq_set_irq_type(irqs[i].irq, IRQ_TYPE_NONE);
575 }
576 EXPORT_SYMBOL(soc_pcmcia_disable_irqs);
577
578 void soc_pcmcia_enable_irqs(struct soc_pcmcia_socket *skt,
579 struct pcmcia_irqs *irqs, int nr)
580 {
581 int i;
582
583 for (i = 0; i < nr; i++)
584 if (irqs[i].sock == skt->nr) {
585 irq_set_irq_type(irqs[i].irq, IRQ_TYPE_EDGE_RISING);
586 irq_set_irq_type(irqs[i].irq, IRQ_TYPE_EDGE_BOTH);
587 }
588 }
589 EXPORT_SYMBOL(soc_pcmcia_enable_irqs);
590
591
592 static LIST_HEAD(soc_pcmcia_sockets);
593 static DEFINE_MUTEX(soc_pcmcia_sockets_lock);
594
595 #ifdef CONFIG_CPU_FREQ
596 static int
597 soc_pcmcia_notifier(struct notifier_block *nb, unsigned long val, void *data)
598 {
599 struct soc_pcmcia_socket *skt;
600 struct cpufreq_freqs *freqs = data;
601 int ret = 0;
602
603 mutex_lock(&soc_pcmcia_sockets_lock);
604 list_for_each_entry(skt, &soc_pcmcia_sockets, node)
605 if (skt->ops->frequency_change)
606 ret += skt->ops->frequency_change(skt, val, freqs);
607 mutex_unlock(&soc_pcmcia_sockets_lock);
608
609 return ret;
610 }
611
612 static struct notifier_block soc_pcmcia_notifier_block = {
613 .notifier_call = soc_pcmcia_notifier
614 };
615
616 static int soc_pcmcia_cpufreq_register(void)
617 {
618 int ret;
619
620 ret = cpufreq_register_notifier(&soc_pcmcia_notifier_block,
621 CPUFREQ_TRANSITION_NOTIFIER);
622 if (ret < 0)
623 printk(KERN_ERR "Unable to register CPU frequency change "
624 "notifier for PCMCIA (%d)\n", ret);
625 return ret;
626 }
627 fs_initcall(soc_pcmcia_cpufreq_register);
628
629 static void soc_pcmcia_cpufreq_unregister(void)
630 {
631 cpufreq_unregister_notifier(&soc_pcmcia_notifier_block,
632 CPUFREQ_TRANSITION_NOTIFIER);
633 }
634 module_exit(soc_pcmcia_cpufreq_unregister);
635
636 #endif
637
638 void soc_pcmcia_remove_one(struct soc_pcmcia_socket *skt)
639 {
640 mutex_lock(&soc_pcmcia_sockets_lock);
641 del_timer_sync(&skt->poll_timer);
642
643 pcmcia_unregister_socket(&skt->socket);
644
645 skt->ops->hw_shutdown(skt);
646
647 soc_common_pcmcia_config_skt(skt, &dead_socket);
648
649 list_del(&skt->node);
650 mutex_unlock(&soc_pcmcia_sockets_lock);
651
652 iounmap(skt->virt_io);
653 skt->virt_io = NULL;
654 release_resource(&skt->res_attr);
655 release_resource(&skt->res_mem);
656 release_resource(&skt->res_io);
657 release_resource(&skt->res_skt);
658 }
659 EXPORT_SYMBOL(soc_pcmcia_remove_one);
660
661 int soc_pcmcia_add_one(struct soc_pcmcia_socket *skt)
662 {
663 int ret;
664
665 init_timer(&skt->poll_timer);
666 skt->poll_timer.function = soc_common_pcmcia_poll_event;
667 skt->poll_timer.data = (unsigned long)skt;
668 skt->poll_timer.expires = jiffies + SOC_PCMCIA_POLL_PERIOD;
669
670 ret = request_resource(&iomem_resource, &skt->res_skt);
671 if (ret)
672 goto out_err_1;
673
674 ret = request_resource(&skt->res_skt, &skt->res_io);
675 if (ret)
676 goto out_err_2;
677
678 ret = request_resource(&skt->res_skt, &skt->res_mem);
679 if (ret)
680 goto out_err_3;
681
682 ret = request_resource(&skt->res_skt, &skt->res_attr);
683 if (ret)
684 goto out_err_4;
685
686 skt->virt_io = ioremap(skt->res_io.start, 0x10000);
687 if (skt->virt_io == NULL) {
688 ret = -ENOMEM;
689 goto out_err_5;
690 }
691
692 mutex_lock(&soc_pcmcia_sockets_lock);
693
694 list_add(&skt->node, &soc_pcmcia_sockets);
695
696 /*
697 * We initialize default socket timing here, because
698 * we are not guaranteed to see a SetIOMap operation at
699 * runtime.
700 */
701 skt->ops->set_timing(skt);
702
703 ret = skt->ops->hw_init(skt);
704 if (ret)
705 goto out_err_6;
706
707 skt->socket.ops = &soc_common_pcmcia_operations;
708 skt->socket.features = SS_CAP_STATIC_MAP|SS_CAP_PCCARD;
709 skt->socket.resource_ops = &pccard_static_ops;
710 skt->socket.irq_mask = 0;
711 skt->socket.map_size = PAGE_SIZE;
712 skt->socket.io_offset = (unsigned long)skt->virt_io;
713
714 skt->status = soc_common_pcmcia_skt_state(skt);
715
716 ret = pcmcia_register_socket(&skt->socket);
717 if (ret)
718 goto out_err_7;
719
720 add_timer(&skt->poll_timer);
721
722 mutex_unlock(&soc_pcmcia_sockets_lock);
723
724 ret = device_create_file(&skt->socket.dev, &dev_attr_status);
725 if (ret)
726 goto out_err_8;
727
728 return ret;
729
730 out_err_8:
731 mutex_lock(&soc_pcmcia_sockets_lock);
732 del_timer_sync(&skt->poll_timer);
733 pcmcia_unregister_socket(&skt->socket);
734
735 out_err_7:
736 skt->ops->hw_shutdown(skt);
737 out_err_6:
738 list_del(&skt->node);
739 mutex_unlock(&soc_pcmcia_sockets_lock);
740 iounmap(skt->virt_io);
741 out_err_5:
742 release_resource(&skt->res_attr);
743 out_err_4:
744 release_resource(&skt->res_mem);
745 out_err_3:
746 release_resource(&skt->res_io);
747 out_err_2:
748 release_resource(&skt->res_skt);
749 out_err_1:
750
751 return ret;
752 }
753 EXPORT_SYMBOL(soc_pcmcia_add_one);
754
755 MODULE_AUTHOR("John Dorsey <john+@cs.cmu.edu>");
756 MODULE_DESCRIPTION("Linux PCMCIA Card Services: Common SoC support");
757 MODULE_LICENSE("Dual MPL/GPL");
linux-next