Root/
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/gpio.h> |
36 | #include <linux/init.h> |
37 | #include <linux/interrupt.h> |
38 | #include <linux/io.h> |
39 | #include <linux/irq.h> |
40 | #include <linux/kernel.h> |
41 | #include <linux/mm.h> |
42 | #include <linux/module.h> |
43 | #include <linux/moduleparam.h> |
44 | #include <linux/mutex.h> |
45 | #include <linux/spinlock.h> |
46 | #include <linux/timer.h> |
47 | |
48 | #include <mach/hardware.h> |
49 | |
50 | #include "soc_common.h" |
51 | |
52 | static irqreturn_t soc_common_pcmcia_interrupt(int irq, void *dev); |
53 | |
54 | #ifdef CONFIG_PCMCIA_DEBUG |
55 | |
56 | static int pc_debug; |
57 | module_param(pc_debug, int, 0644); |
58 | |
59 | void soc_pcmcia_debug(struct soc_pcmcia_socket *skt, const char *func, |
60 | int lvl, const char *fmt, ...) |
61 | { |
62 | struct va_format vaf; |
63 | va_list args; |
64 | if (pc_debug > lvl) { |
65 | va_start(args, fmt); |
66 | |
67 | vaf.fmt = fmt; |
68 | vaf.va = &args; |
69 | |
70 | printk(KERN_DEBUG "skt%u: %s: %pV", skt->nr, func, &vaf); |
71 | |
72 | va_end(args); |
73 | } |
74 | } |
75 | EXPORT_SYMBOL(soc_pcmcia_debug); |
76 | |
77 | #endif |
78 | |
79 | #define to_soc_pcmcia_socket(x) \ |
80 | container_of(x, struct soc_pcmcia_socket, socket) |
81 | |
82 | static unsigned short |
83 | calc_speed(unsigned short *spds, int num, unsigned short dflt) |
84 | { |
85 | unsigned short speed = 0; |
86 | int i; |
87 | |
88 | for (i = 0; i < num; i++) |
89 | if (speed < spds[i]) |
90 | speed = spds[i]; |
91 | if (speed == 0) |
92 | speed = dflt; |
93 | |
94 | return speed; |
95 | } |
96 | |
97 | void soc_common_pcmcia_get_timing(struct soc_pcmcia_socket *skt, |
98 | struct soc_pcmcia_timing *timing) |
99 | { |
100 | timing->io = |
101 | calc_speed(skt->spd_io, MAX_IO_WIN, SOC_PCMCIA_IO_ACCESS); |
102 | timing->mem = |
103 | calc_speed(skt->spd_mem, MAX_WIN, SOC_PCMCIA_3V_MEM_ACCESS); |
104 | timing->attr = |
105 | calc_speed(skt->spd_attr, MAX_WIN, SOC_PCMCIA_3V_MEM_ACCESS); |
106 | } |
107 | EXPORT_SYMBOL(soc_common_pcmcia_get_timing); |
108 | |
109 | static void __soc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt, |
110 | unsigned int nr) |
111 | { |
112 | unsigned int i; |
113 | |
114 | for (i = 0; i < nr; i++) { |
115 | if (skt->stat[i].irq) |
116 | free_irq(skt->stat[i].irq, skt); |
117 | if (gpio_is_valid(skt->stat[i].gpio)) |
118 | gpio_free(skt->stat[i].gpio); |
119 | } |
120 | |
121 | if (skt->ops->hw_shutdown) |
122 | skt->ops->hw_shutdown(skt); |
123 | } |
124 | |
125 | static void soc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) |
126 | { |
127 | __soc_pcmcia_hw_shutdown(skt, ARRAY_SIZE(skt->stat)); |
128 | } |
129 | |
130 | static int soc_pcmcia_hw_init(struct soc_pcmcia_socket *skt) |
131 | { |
132 | int ret = 0, i; |
133 | |
134 | if (skt->ops->hw_init) { |
135 | ret = skt->ops->hw_init(skt); |
136 | if (ret) |
137 | return ret; |
138 | } |
139 | |
140 | for (i = 0; i < ARRAY_SIZE(skt->stat); i++) { |
141 | if (gpio_is_valid(skt->stat[i].gpio)) { |
142 | int irq; |
143 | |
144 | ret = gpio_request_one(skt->stat[i].gpio, GPIOF_IN, |
145 | skt->stat[i].name); |
146 | if (ret) { |
147 | __soc_pcmcia_hw_shutdown(skt, i); |
148 | return ret; |
149 | } |
150 | |
151 | irq = gpio_to_irq(skt->stat[i].gpio); |
152 | |
153 | if (i == SOC_STAT_RDY) |
154 | skt->socket.pci_irq = irq; |
155 | else |
156 | skt->stat[i].irq = irq; |
157 | } |
158 | |
159 | if (skt->stat[i].irq) { |
160 | ret = request_irq(skt->stat[i].irq, |
161 | soc_common_pcmcia_interrupt, |
162 | IRQF_TRIGGER_NONE, |
163 | skt->stat[i].name, skt); |
164 | if (ret) { |
165 | if (gpio_is_valid(skt->stat[i].gpio)) |
166 | gpio_free(skt->stat[i].gpio); |
167 | __soc_pcmcia_hw_shutdown(skt, i); |
168 | return ret; |
169 | } |
170 | } |
171 | } |
172 | |
173 | return ret; |
174 | } |
175 | |
176 | static void soc_pcmcia_hw_enable(struct soc_pcmcia_socket *skt) |
177 | { |
178 | int i; |
179 | |
180 | for (i = 0; i < ARRAY_SIZE(skt->stat); i++) |
181 | if (skt->stat[i].irq) { |
182 | irq_set_irq_type(skt->stat[i].irq, IRQ_TYPE_EDGE_RISING); |
183 | irq_set_irq_type(skt->stat[i].irq, IRQ_TYPE_EDGE_BOTH); |
184 | } |
185 | } |
186 | |
187 | static void soc_pcmcia_hw_disable(struct soc_pcmcia_socket *skt) |
188 | { |
189 | int i; |
190 | |
191 | for (i = 0; i < ARRAY_SIZE(skt->stat); i++) |
192 | if (skt->stat[i].irq) |
193 | irq_set_irq_type(skt->stat[i].irq, IRQ_TYPE_NONE); |
194 | } |
195 | |
196 | static unsigned int soc_common_pcmcia_skt_state(struct soc_pcmcia_socket *skt) |
197 | { |
198 | struct pcmcia_state state; |
199 | unsigned int stat; |
200 | |
201 | memset(&state, 0, sizeof(struct pcmcia_state)); |
202 | |
203 | /* Make battery voltage state report 'good' */ |
204 | state.bvd1 = 1; |
205 | state.bvd2 = 1; |
206 | |
207 | /* CD is active low by default */ |
208 | if (gpio_is_valid(skt->stat[SOC_STAT_CD].gpio)) |
209 | state.detect = !gpio_get_value(skt->stat[SOC_STAT_CD].gpio); |
210 | |
211 | /* RDY and BVD are active high by default */ |
212 | if (gpio_is_valid(skt->stat[SOC_STAT_RDY].gpio)) |
213 | state.ready = !!gpio_get_value(skt->stat[SOC_STAT_RDY].gpio); |
214 | if (gpio_is_valid(skt->stat[SOC_STAT_BVD1].gpio)) |
215 | state.bvd1 = !!gpio_get_value(skt->stat[SOC_STAT_BVD1].gpio); |
216 | if (gpio_is_valid(skt->stat[SOC_STAT_BVD2].gpio)) |
217 | state.bvd2 = !!gpio_get_value(skt->stat[SOC_STAT_BVD2].gpio); |
218 | |
219 | skt->ops->socket_state(skt, &state); |
220 | |
221 | stat = state.detect ? SS_DETECT : 0; |
222 | stat |= state.ready ? SS_READY : 0; |
223 | stat |= state.wrprot ? SS_WRPROT : 0; |
224 | stat |= state.vs_3v ? SS_3VCARD : 0; |
225 | stat |= state.vs_Xv ? SS_XVCARD : 0; |
226 | |
227 | /* The power status of individual sockets is not available |
228 | * explicitly from the hardware, so we just remember the state |
229 | * and regurgitate it upon request: |
230 | */ |
231 | stat |= skt->cs_state.Vcc ? SS_POWERON : 0; |
232 | |
233 | if (skt->cs_state.flags & SS_IOCARD) |
234 | stat |= state.bvd1 ? SS_STSCHG : 0; |
235 | else { |
236 | if (state.bvd1 == 0) |
237 | stat |= SS_BATDEAD; |
238 | else if (state.bvd2 == 0) |
239 | stat |= SS_BATWARN; |
240 | } |
241 | return stat; |
242 | } |
243 | |
244 | /* |
245 | * soc_common_pcmcia_config_skt |
246 | * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
247 | * |
248 | * Convert PCMCIA socket state to our socket configure structure. |
249 | */ |
250 | static int soc_common_pcmcia_config_skt( |
251 | struct soc_pcmcia_socket *skt, socket_state_t *state) |
252 | { |
253 | int ret; |
254 | |
255 | ret = skt->ops->configure_socket(skt, state); |
256 | if (ret == 0) { |
257 | /* |
258 | * This really needs a better solution. The IRQ |
259 | * may or may not be claimed by the driver. |
260 | */ |
261 | if (skt->irq_state != 1 && state->io_irq) { |
262 | skt->irq_state = 1; |
263 | irq_set_irq_type(skt->socket.pci_irq, |
264 | IRQ_TYPE_EDGE_FALLING); |
265 | } else if (skt->irq_state == 1 && state->io_irq == 0) { |
266 | skt->irq_state = 0; |
267 | irq_set_irq_type(skt->socket.pci_irq, IRQ_TYPE_NONE); |
268 | } |
269 | |
270 | skt->cs_state = *state; |
271 | } |
272 | |
273 | if (ret < 0) |
274 | printk(KERN_ERR "soc_common_pcmcia: unable to configure " |
275 | "socket %d\n", skt->nr); |
276 | |
277 | return ret; |
278 | } |
279 | |
280 | /* soc_common_pcmcia_sock_init() |
281 | * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
282 | * |
283 | * (Re-)Initialise the socket, turning on status interrupts |
284 | * and PCMCIA bus. This must wait for power to stabilise |
285 | * so that the card status signals report correctly. |
286 | * |
287 | * Returns: 0 |
288 | */ |
289 | static int soc_common_pcmcia_sock_init(struct pcmcia_socket *sock) |
290 | { |
291 | struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); |
292 | |
293 | debug(skt, 2, "initializing socket\n"); |
294 | if (skt->ops->socket_init) |
295 | skt->ops->socket_init(skt); |
296 | soc_pcmcia_hw_enable(skt); |
297 | return 0; |
298 | } |
299 | |
300 | |
301 | /* |
302 | * soc_common_pcmcia_suspend() |
303 | * ^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
304 | * |
305 | * Remove power on the socket, disable IRQs from the card. |
306 | * Turn off status interrupts, and disable the PCMCIA bus. |
307 | * |
308 | * Returns: 0 |
309 | */ |
310 | static int soc_common_pcmcia_suspend(struct pcmcia_socket *sock) |
311 | { |
312 | struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); |
313 | |
314 | debug(skt, 2, "suspending socket\n"); |
315 | |
316 | soc_pcmcia_hw_disable(skt); |
317 | if (skt->ops->socket_suspend) |
318 | skt->ops->socket_suspend(skt); |
319 | |
320 | return 0; |
321 | } |
322 | |
323 | static DEFINE_SPINLOCK(status_lock); |
324 | |
325 | static void soc_common_check_status(struct soc_pcmcia_socket *skt) |
326 | { |
327 | unsigned int events; |
328 | |
329 | debug(skt, 4, "entering PCMCIA monitoring thread\n"); |
330 | |
331 | do { |
332 | unsigned int status; |
333 | unsigned long flags; |
334 | |
335 | status = soc_common_pcmcia_skt_state(skt); |
336 | |
337 | spin_lock_irqsave(&status_lock, flags); |
338 | events = (status ^ skt->status) & skt->cs_state.csc_mask; |
339 | skt->status = status; |
340 | spin_unlock_irqrestore(&status_lock, flags); |
341 | |
342 | debug(skt, 4, "events: %s%s%s%s%s%s\n", |
343 | events == 0 ? "<NONE>" : "", |
344 | events & SS_DETECT ? "DETECT " : "", |
345 | events & SS_READY ? "READY " : "", |
346 | events & SS_BATDEAD ? "BATDEAD " : "", |
347 | events & SS_BATWARN ? "BATWARN " : "", |
348 | events & SS_STSCHG ? "STSCHG " : ""); |
349 | |
350 | if (events) |
351 | pcmcia_parse_events(&skt->socket, events); |
352 | } while (events); |
353 | } |
354 | |
355 | /* Let's poll for events in addition to IRQs since IRQ only is unreliable... */ |
356 | static void soc_common_pcmcia_poll_event(unsigned long dummy) |
357 | { |
358 | struct soc_pcmcia_socket *skt = (struct soc_pcmcia_socket *)dummy; |
359 | debug(skt, 4, "polling for events\n"); |
360 | |
361 | mod_timer(&skt->poll_timer, jiffies + SOC_PCMCIA_POLL_PERIOD); |
362 | |
363 | soc_common_check_status(skt); |
364 | } |
365 | |
366 | |
367 | /* |
368 | * Service routine for socket driver interrupts (requested by the |
369 | * low-level PCMCIA init() operation via soc_common_pcmcia_thread()). |
370 | * The actual interrupt-servicing work is performed by |
371 | * soc_common_pcmcia_thread(), largely because the Card Services event- |
372 | * handling code performs scheduling operations which cannot be |
373 | * executed from within an interrupt context. |
374 | */ |
375 | static irqreturn_t soc_common_pcmcia_interrupt(int irq, void *dev) |
376 | { |
377 | struct soc_pcmcia_socket *skt = dev; |
378 | |
379 | debug(skt, 3, "servicing IRQ %d\n", irq); |
380 | |
381 | soc_common_check_status(skt); |
382 | |
383 | return IRQ_HANDLED; |
384 | } |
385 | |
386 | |
387 | /* |
388 | * Implements the get_status() operation for the in-kernel PCMCIA |
389 | * service (formerly SS_GetStatus in Card Services). Essentially just |
390 | * fills in bits in `status' according to internal driver state or |
391 | * the value of the voltage detect chipselect register. |
392 | * |
393 | * As a debugging note, during card startup, the PCMCIA core issues |
394 | * three set_socket() commands in a row the first with RESET deasserted, |
395 | * the second with RESET asserted, and the last with RESET deasserted |
396 | * again. Following the third set_socket(), a get_status() command will |
397 | * be issued. The kernel is looking for the SS_READY flag (see |
398 | * setup_socket(), reset_socket(), and unreset_socket() in cs.c). |
399 | * |
400 | * Returns: 0 |
401 | */ |
402 | static int |
403 | soc_common_pcmcia_get_status(struct pcmcia_socket *sock, unsigned int *status) |
404 | { |
405 | struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); |
406 | |
407 | skt->status = soc_common_pcmcia_skt_state(skt); |
408 | *status = skt->status; |
409 | |
410 | return 0; |
411 | } |
412 | |
413 | |
414 | /* |
415 | * Implements the set_socket() operation for the in-kernel PCMCIA |
416 | * service (formerly SS_SetSocket in Card Services). We more or |
417 | * less punt all of this work and let the kernel handle the details |
418 | * of power configuration, reset, &c. We also record the value of |
419 | * `state' in order to regurgitate it to the PCMCIA core later. |
420 | */ |
421 | static int soc_common_pcmcia_set_socket( |
422 | struct pcmcia_socket *sock, socket_state_t *state) |
423 | { |
424 | struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); |
425 | |
426 | debug(skt, 2, "mask: %s%s%s%s%s%s flags: %s%s%s%s%s%s Vcc %d Vpp %d irq %d\n", |
427 | (state->csc_mask == 0) ? "<NONE> " : "", |
428 | (state->csc_mask & SS_DETECT) ? "DETECT " : "", |
429 | (state->csc_mask & SS_READY) ? "READY " : "", |
430 | (state->csc_mask & SS_BATDEAD) ? "BATDEAD " : "", |
431 | (state->csc_mask & SS_BATWARN) ? "BATWARN " : "", |
432 | (state->csc_mask & SS_STSCHG) ? "STSCHG " : "", |
433 | (state->flags == 0) ? "<NONE> " : "", |
434 | (state->flags & SS_PWR_AUTO) ? "PWR_AUTO " : "", |
435 | (state->flags & SS_IOCARD) ? "IOCARD " : "", |
436 | (state->flags & SS_RESET) ? "RESET " : "", |
437 | (state->flags & SS_SPKR_ENA) ? "SPKR_ENA " : "", |
438 | (state->flags & SS_OUTPUT_ENA) ? "OUTPUT_ENA " : "", |
439 | state->Vcc, state->Vpp, state->io_irq); |
440 | |
441 | return soc_common_pcmcia_config_skt(skt, state); |
442 | } |
443 | |
444 | |
445 | /* |
446 | * Implements the set_io_map() operation for the in-kernel PCMCIA |
447 | * service (formerly SS_SetIOMap in Card Services). We configure |
448 | * the map speed as requested, but override the address ranges |
449 | * supplied by Card Services. |
450 | * |
451 | * Returns: 0 on success, -1 on error |
452 | */ |
453 | static int soc_common_pcmcia_set_io_map( |
454 | struct pcmcia_socket *sock, struct pccard_io_map *map) |
455 | { |
456 | struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); |
457 | unsigned short speed = map->speed; |
458 | |
459 | debug(skt, 2, "map %u speed %u start 0x%08llx stop 0x%08llx\n", |
460 | map->map, map->speed, (unsigned long long)map->start, |
461 | (unsigned long long)map->stop); |
462 | debug(skt, 2, "flags: %s%s%s%s%s%s%s%s\n", |
463 | (map->flags == 0) ? "<NONE>" : "", |
464 | (map->flags & MAP_ACTIVE) ? "ACTIVE " : "", |
465 | (map->flags & MAP_16BIT) ? "16BIT " : "", |
466 | (map->flags & MAP_AUTOSZ) ? "AUTOSZ " : "", |
467 | (map->flags & MAP_0WS) ? "0WS " : "", |
468 | (map->flags & MAP_WRPROT) ? "WRPROT " : "", |
469 | (map->flags & MAP_USE_WAIT) ? "USE_WAIT " : "", |
470 | (map->flags & MAP_PREFETCH) ? "PREFETCH " : ""); |
471 | |
472 | if (map->map >= MAX_IO_WIN) { |
473 | printk(KERN_ERR "%s(): map (%d) out of range\n", __func__, |
474 | map->map); |
475 | return -1; |
476 | } |
477 | |
478 | if (map->flags & MAP_ACTIVE) { |
479 | if (speed == 0) |
480 | speed = SOC_PCMCIA_IO_ACCESS; |
481 | } else { |
482 | speed = 0; |
483 | } |
484 | |
485 | skt->spd_io[map->map] = speed; |
486 | skt->ops->set_timing(skt); |
487 | |
488 | if (map->stop == 1) |
489 | map->stop = PAGE_SIZE-1; |
490 | |
491 | map->stop -= map->start; |
492 | map->stop += skt->socket.io_offset; |
493 | map->start = skt->socket.io_offset; |
494 | |
495 | return 0; |
496 | } |
497 | |
498 | |
499 | /* |
500 | * Implements the set_mem_map() operation for the in-kernel PCMCIA |
501 | * service (formerly SS_SetMemMap in Card Services). We configure |
502 | * the map speed as requested, but override the address ranges |
503 | * supplied by Card Services. |
504 | * |
505 | * Returns: 0 on success, -ERRNO on error |
506 | */ |
507 | static int soc_common_pcmcia_set_mem_map( |
508 | struct pcmcia_socket *sock, struct pccard_mem_map *map) |
509 | { |
510 | struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); |
511 | struct resource *res; |
512 | unsigned short speed = map->speed; |
513 | |
514 | debug(skt, 2, "map %u speed %u card_start %08x\n", |
515 | map->map, map->speed, map->card_start); |
516 | debug(skt, 2, "flags: %s%s%s%s%s%s%s%s\n", |
517 | (map->flags == 0) ? "<NONE>" : "", |
518 | (map->flags & MAP_ACTIVE) ? "ACTIVE " : "", |
519 | (map->flags & MAP_16BIT) ? "16BIT " : "", |
520 | (map->flags & MAP_AUTOSZ) ? "AUTOSZ " : "", |
521 | (map->flags & MAP_0WS) ? "0WS " : "", |
522 | (map->flags & MAP_WRPROT) ? "WRPROT " : "", |
523 | (map->flags & MAP_ATTRIB) ? "ATTRIB " : "", |
524 | (map->flags & MAP_USE_WAIT) ? "USE_WAIT " : ""); |
525 | |
526 | if (map->map >= MAX_WIN) |
527 | return -EINVAL; |
528 | |
529 | if (map->flags & MAP_ACTIVE) { |
530 | if (speed == 0) |
531 | speed = 300; |
532 | } else { |
533 | speed = 0; |
534 | } |
535 | |
536 | if (map->flags & MAP_ATTRIB) { |
537 | res = &skt->res_attr; |
538 | skt->spd_attr[map->map] = speed; |
539 | skt->spd_mem[map->map] = 0; |
540 | } else { |
541 | res = &skt->res_mem; |
542 | skt->spd_attr[map->map] = 0; |
543 | skt->spd_mem[map->map] = speed; |
544 | } |
545 | |
546 | skt->ops->set_timing(skt); |
547 | |
548 | map->static_start = res->start + map->card_start; |
549 | |
550 | return 0; |
551 | } |
552 | |
553 | struct bittbl { |
554 | unsigned int mask; |
555 | const char *name; |
556 | }; |
557 | |
558 | static struct bittbl status_bits[] = { |
559 | { SS_WRPROT, "SS_WRPROT" }, |
560 | { SS_BATDEAD, "SS_BATDEAD" }, |
561 | { SS_BATWARN, "SS_BATWARN" }, |
562 | { SS_READY, "SS_READY" }, |
563 | { SS_DETECT, "SS_DETECT" }, |
564 | { SS_POWERON, "SS_POWERON" }, |
565 | { SS_STSCHG, "SS_STSCHG" }, |
566 | { SS_3VCARD, "SS_3VCARD" }, |
567 | { SS_XVCARD, "SS_XVCARD" }, |
568 | }; |
569 | |
570 | static struct bittbl conf_bits[] = { |
571 | { SS_PWR_AUTO, "SS_PWR_AUTO" }, |
572 | { SS_IOCARD, "SS_IOCARD" }, |
573 | { SS_RESET, "SS_RESET" }, |
574 | { SS_DMA_MODE, "SS_DMA_MODE" }, |
575 | { SS_SPKR_ENA, "SS_SPKR_ENA" }, |
576 | { SS_OUTPUT_ENA, "SS_OUTPUT_ENA" }, |
577 | }; |
578 | |
579 | static void dump_bits(char **p, const char *prefix, |
580 | unsigned int val, struct bittbl *bits, int sz) |
581 | { |
582 | char *b = *p; |
583 | int i; |
584 | |
585 | b += sprintf(b, "%-9s:", prefix); |
586 | for (i = 0; i < sz; i++) |
587 | if (val & bits[i].mask) |
588 | b += sprintf(b, " %s", bits[i].name); |
589 | *b++ = '\n'; |
590 | *p = b; |
591 | } |
592 | |
593 | /* |
594 | * Implements the /sys/class/pcmcia_socket/??/status file. |
595 | * |
596 | * Returns: the number of characters added to the buffer |
597 | */ |
598 | static ssize_t show_status( |
599 | struct device *dev, struct device_attribute *attr, char *buf) |
600 | { |
601 | struct soc_pcmcia_socket *skt = |
602 | container_of(dev, struct soc_pcmcia_socket, socket.dev); |
603 | char *p = buf; |
604 | |
605 | p += sprintf(p, "slot : %d\n", skt->nr); |
606 | |
607 | dump_bits(&p, "status", skt->status, |
608 | status_bits, ARRAY_SIZE(status_bits)); |
609 | dump_bits(&p, "csc_mask", skt->cs_state.csc_mask, |
610 | status_bits, ARRAY_SIZE(status_bits)); |
611 | dump_bits(&p, "cs_flags", skt->cs_state.flags, |
612 | conf_bits, ARRAY_SIZE(conf_bits)); |
613 | |
614 | p += sprintf(p, "Vcc : %d\n", skt->cs_state.Vcc); |
615 | p += sprintf(p, "Vpp : %d\n", skt->cs_state.Vpp); |
616 | p += sprintf(p, "IRQ : %d (%d)\n", skt->cs_state.io_irq, |
617 | skt->socket.pci_irq); |
618 | if (skt->ops->show_timing) |
619 | p += skt->ops->show_timing(skt, p); |
620 | |
621 | return p-buf; |
622 | } |
623 | static DEVICE_ATTR(status, S_IRUGO, show_status, NULL); |
624 | |
625 | |
626 | static struct pccard_operations soc_common_pcmcia_operations = { |
627 | .init = soc_common_pcmcia_sock_init, |
628 | .suspend = soc_common_pcmcia_suspend, |
629 | .get_status = soc_common_pcmcia_get_status, |
630 | .set_socket = soc_common_pcmcia_set_socket, |
631 | .set_io_map = soc_common_pcmcia_set_io_map, |
632 | .set_mem_map = soc_common_pcmcia_set_mem_map, |
633 | }; |
634 | |
635 | |
636 | static LIST_HEAD(soc_pcmcia_sockets); |
637 | static DEFINE_MUTEX(soc_pcmcia_sockets_lock); |
638 | |
639 | #ifdef CONFIG_CPU_FREQ |
640 | static int |
641 | soc_pcmcia_notifier(struct notifier_block *nb, unsigned long val, void *data) |
642 | { |
643 | struct soc_pcmcia_socket *skt; |
644 | struct cpufreq_freqs *freqs = data; |
645 | int ret = 0; |
646 | |
647 | mutex_lock(&soc_pcmcia_sockets_lock); |
648 | list_for_each_entry(skt, &soc_pcmcia_sockets, node) |
649 | if (skt->ops->frequency_change) |
650 | ret += skt->ops->frequency_change(skt, val, freqs); |
651 | mutex_unlock(&soc_pcmcia_sockets_lock); |
652 | |
653 | return ret; |
654 | } |
655 | |
656 | static struct notifier_block soc_pcmcia_notifier_block = { |
657 | .notifier_call = soc_pcmcia_notifier |
658 | }; |
659 | |
660 | static int soc_pcmcia_cpufreq_register(void) |
661 | { |
662 | int ret; |
663 | |
664 | ret = cpufreq_register_notifier(&soc_pcmcia_notifier_block, |
665 | CPUFREQ_TRANSITION_NOTIFIER); |
666 | if (ret < 0) |
667 | printk(KERN_ERR "Unable to register CPU frequency change " |
668 | "notifier for PCMCIA (%d)\n", ret); |
669 | return ret; |
670 | } |
671 | fs_initcall(soc_pcmcia_cpufreq_register); |
672 | |
673 | static void soc_pcmcia_cpufreq_unregister(void) |
674 | { |
675 | cpufreq_unregister_notifier(&soc_pcmcia_notifier_block, |
676 | CPUFREQ_TRANSITION_NOTIFIER); |
677 | } |
678 | module_exit(soc_pcmcia_cpufreq_unregister); |
679 | |
680 | #endif |
681 | |
682 | void soc_pcmcia_init_one(struct soc_pcmcia_socket *skt, |
683 | struct pcmcia_low_level *ops, struct device *dev) |
684 | { |
685 | int i; |
686 | |
687 | skt->ops = ops; |
688 | skt->socket.owner = ops->owner; |
689 | skt->socket.dev.parent = dev; |
690 | skt->socket.pci_irq = NO_IRQ; |
691 | |
692 | for (i = 0; i < ARRAY_SIZE(skt->stat); i++) |
693 | skt->stat[i].gpio = -EINVAL; |
694 | } |
695 | EXPORT_SYMBOL(soc_pcmcia_init_one); |
696 | |
697 | void soc_pcmcia_remove_one(struct soc_pcmcia_socket *skt) |
698 | { |
699 | mutex_lock(&soc_pcmcia_sockets_lock); |
700 | del_timer_sync(&skt->poll_timer); |
701 | |
702 | pcmcia_unregister_socket(&skt->socket); |
703 | |
704 | soc_pcmcia_hw_shutdown(skt); |
705 | |
706 | /* should not be required; violates some lowlevel drivers */ |
707 | soc_common_pcmcia_config_skt(skt, &dead_socket); |
708 | |
709 | list_del(&skt->node); |
710 | mutex_unlock(&soc_pcmcia_sockets_lock); |
711 | |
712 | iounmap(skt->virt_io); |
713 | skt->virt_io = NULL; |
714 | release_resource(&skt->res_attr); |
715 | release_resource(&skt->res_mem); |
716 | release_resource(&skt->res_io); |
717 | release_resource(&skt->res_skt); |
718 | } |
719 | EXPORT_SYMBOL(soc_pcmcia_remove_one); |
720 | |
721 | int soc_pcmcia_add_one(struct soc_pcmcia_socket *skt) |
722 | { |
723 | int ret; |
724 | |
725 | init_timer(&skt->poll_timer); |
726 | skt->poll_timer.function = soc_common_pcmcia_poll_event; |
727 | skt->poll_timer.data = (unsigned long)skt; |
728 | skt->poll_timer.expires = jiffies + SOC_PCMCIA_POLL_PERIOD; |
729 | |
730 | ret = request_resource(&iomem_resource, &skt->res_skt); |
731 | if (ret) |
732 | goto out_err_1; |
733 | |
734 | ret = request_resource(&skt->res_skt, &skt->res_io); |
735 | if (ret) |
736 | goto out_err_2; |
737 | |
738 | ret = request_resource(&skt->res_skt, &skt->res_mem); |
739 | if (ret) |
740 | goto out_err_3; |
741 | |
742 | ret = request_resource(&skt->res_skt, &skt->res_attr); |
743 | if (ret) |
744 | goto out_err_4; |
745 | |
746 | skt->virt_io = ioremap(skt->res_io.start, 0x10000); |
747 | if (skt->virt_io == NULL) { |
748 | ret = -ENOMEM; |
749 | goto out_err_5; |
750 | } |
751 | |
752 | mutex_lock(&soc_pcmcia_sockets_lock); |
753 | |
754 | list_add(&skt->node, &soc_pcmcia_sockets); |
755 | |
756 | /* |
757 | * We initialize default socket timing here, because |
758 | * we are not guaranteed to see a SetIOMap operation at |
759 | * runtime. |
760 | */ |
761 | skt->ops->set_timing(skt); |
762 | |
763 | ret = soc_pcmcia_hw_init(skt); |
764 | if (ret) |
765 | goto out_err_6; |
766 | |
767 | skt->socket.ops = &soc_common_pcmcia_operations; |
768 | skt->socket.features = SS_CAP_STATIC_MAP|SS_CAP_PCCARD; |
769 | skt->socket.resource_ops = &pccard_static_ops; |
770 | skt->socket.irq_mask = 0; |
771 | skt->socket.map_size = PAGE_SIZE; |
772 | skt->socket.io_offset = (unsigned long)skt->virt_io; |
773 | |
774 | skt->status = soc_common_pcmcia_skt_state(skt); |
775 | |
776 | ret = pcmcia_register_socket(&skt->socket); |
777 | if (ret) |
778 | goto out_err_7; |
779 | |
780 | add_timer(&skt->poll_timer); |
781 | |
782 | mutex_unlock(&soc_pcmcia_sockets_lock); |
783 | |
784 | ret = device_create_file(&skt->socket.dev, &dev_attr_status); |
785 | if (ret) |
786 | goto out_err_8; |
787 | |
788 | return ret; |
789 | |
790 | out_err_8: |
791 | mutex_lock(&soc_pcmcia_sockets_lock); |
792 | del_timer_sync(&skt->poll_timer); |
793 | pcmcia_unregister_socket(&skt->socket); |
794 | |
795 | out_err_7: |
796 | soc_pcmcia_hw_shutdown(skt); |
797 | out_err_6: |
798 | list_del(&skt->node); |
799 | mutex_unlock(&soc_pcmcia_sockets_lock); |
800 | iounmap(skt->virt_io); |
801 | out_err_5: |
802 | release_resource(&skt->res_attr); |
803 | out_err_4: |
804 | release_resource(&skt->res_mem); |
805 | out_err_3: |
806 | release_resource(&skt->res_io); |
807 | out_err_2: |
808 | release_resource(&skt->res_skt); |
809 | out_err_1: |
810 | |
811 | return ret; |
812 | } |
813 | EXPORT_SYMBOL(soc_pcmcia_add_one); |
814 | |
815 | MODULE_AUTHOR("John Dorsey <john+@cs.cmu.edu>"); |
816 | MODULE_DESCRIPTION("Linux PCMCIA Card Services: Common SoC support"); |
817 | MODULE_LICENSE("Dual MPL/GPL"); |
818 |
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