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/gpio/consumer.h> |
37 | #include <linux/init.h> |
38 | #include <linux/interrupt.h> |
39 | #include <linux/io.h> |
40 | #include <linux/irq.h> |
41 | #include <linux/kernel.h> |
42 | #include <linux/mm.h> |
43 | #include <linux/module.h> |
44 | #include <linux/moduleparam.h> |
45 | #include <linux/mutex.h> |
46 | #include <linux/regulator/consumer.h> |
47 | #include <linux/spinlock.h> |
48 | #include <linux/timer.h> |
49 | #include <linux/pci.h> |
50 | |
51 | #include "soc_common.h" |
52 | |
53 | static irqreturn_t soc_common_pcmcia_interrupt(int irq, void *dev); |
54 | |
55 | #ifdef CONFIG_PCMCIA_DEBUG |
56 | |
57 | static int pc_debug; |
58 | module_param(pc_debug, int, 0644); |
59 | |
60 | void soc_pcmcia_debug(struct soc_pcmcia_socket *skt, const char *func, |
61 | int lvl, const char *fmt, ...) |
62 | { |
63 | struct va_format vaf; |
64 | va_list args; |
65 | if (pc_debug > lvl) { |
66 | va_start(args, fmt); |
67 | |
68 | vaf.fmt = fmt; |
69 | vaf.va = &args; |
70 | |
71 | printk(KERN_DEBUG "skt%u: %s: %pV" , skt->nr, func, &vaf); |
72 | |
73 | va_end(args); |
74 | } |
75 | } |
76 | EXPORT_SYMBOL(soc_pcmcia_debug); |
77 | |
78 | #endif |
79 | |
80 | #define to_soc_pcmcia_socket(x) \ |
81 | container_of(x, struct soc_pcmcia_socket, socket) |
82 | |
83 | int soc_pcmcia_regulator_set(struct soc_pcmcia_socket *skt, |
84 | struct soc_pcmcia_regulator *r, int v) |
85 | { |
86 | bool on; |
87 | int ret; |
88 | |
89 | if (!r->reg) |
90 | return 0; |
91 | |
92 | on = v != 0; |
93 | if (r->on == on) |
94 | return 0; |
95 | |
96 | if (on) { |
97 | ret = regulator_set_voltage(regulator: r->reg, min_uV: v * 100000, max_uV: v * 100000); |
98 | if (ret) { |
99 | int vout = regulator_get_voltage(regulator: r->reg) / 100000; |
100 | |
101 | dev_warn(&skt->socket.dev, |
102 | "CS requested %s=%u.%uV, applying %u.%uV\n" , |
103 | r == &skt->vcc ? "Vcc" : "Vpp" , |
104 | v / 10, v % 10, vout / 10, vout % 10); |
105 | } |
106 | |
107 | ret = regulator_enable(regulator: r->reg); |
108 | } else { |
109 | ret = regulator_disable(regulator: r->reg); |
110 | } |
111 | if (ret == 0) |
112 | r->on = on; |
113 | |
114 | return ret; |
115 | } |
116 | EXPORT_SYMBOL_GPL(soc_pcmcia_regulator_set); |
117 | |
118 | static unsigned short |
119 | calc_speed(unsigned short *spds, int num, unsigned short dflt) |
120 | { |
121 | unsigned short speed = 0; |
122 | int i; |
123 | |
124 | for (i = 0; i < num; i++) |
125 | if (speed < spds[i]) |
126 | speed = spds[i]; |
127 | if (speed == 0) |
128 | speed = dflt; |
129 | |
130 | return speed; |
131 | } |
132 | |
133 | void soc_common_pcmcia_get_timing(struct soc_pcmcia_socket *skt, |
134 | struct soc_pcmcia_timing *timing) |
135 | { |
136 | timing->io = |
137 | calc_speed(spds: skt->spd_io, MAX_IO_WIN, SOC_PCMCIA_IO_ACCESS); |
138 | timing->mem = |
139 | calc_speed(spds: skt->spd_mem, MAX_WIN, SOC_PCMCIA_3V_MEM_ACCESS); |
140 | timing->attr = |
141 | calc_speed(spds: skt->spd_attr, MAX_WIN, SOC_PCMCIA_3V_MEM_ACCESS); |
142 | } |
143 | EXPORT_SYMBOL(soc_common_pcmcia_get_timing); |
144 | |
145 | static void __soc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt, |
146 | unsigned int nr) |
147 | { |
148 | unsigned int i; |
149 | |
150 | for (i = 0; i < nr; i++) |
151 | if (skt->stat[i].irq) |
152 | free_irq(skt->stat[i].irq, skt); |
153 | |
154 | if (skt->ops->hw_shutdown) |
155 | skt->ops->hw_shutdown(skt); |
156 | |
157 | clk_disable_unprepare(clk: skt->clk); |
158 | } |
159 | |
160 | static void soc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) |
161 | { |
162 | __soc_pcmcia_hw_shutdown(skt, ARRAY_SIZE(skt->stat)); |
163 | } |
164 | |
165 | int soc_pcmcia_request_gpiods(struct soc_pcmcia_socket *skt) |
166 | { |
167 | struct device *dev = skt->socket.dev.parent; |
168 | struct gpio_desc *desc; |
169 | int i; |
170 | |
171 | for (i = 0; i < ARRAY_SIZE(skt->stat); i++) { |
172 | if (!skt->stat[i].name) |
173 | continue; |
174 | |
175 | desc = devm_gpiod_get(dev, con_id: skt->stat[i].name, flags: GPIOD_IN); |
176 | if (IS_ERR(ptr: desc)) { |
177 | dev_err(dev, "Failed to get GPIO for %s: %ld\n" , |
178 | skt->stat[i].name, PTR_ERR(desc)); |
179 | return PTR_ERR(ptr: desc); |
180 | } |
181 | |
182 | skt->stat[i].desc = desc; |
183 | } |
184 | |
185 | return 0; |
186 | } |
187 | EXPORT_SYMBOL_GPL(soc_pcmcia_request_gpiods); |
188 | |
189 | static int soc_pcmcia_hw_init(struct soc_pcmcia_socket *skt) |
190 | { |
191 | int ret = 0, i; |
192 | |
193 | ret = clk_prepare_enable(clk: skt->clk); |
194 | if (ret) |
195 | return ret; |
196 | |
197 | if (skt->ops->hw_init) { |
198 | ret = skt->ops->hw_init(skt); |
199 | if (ret) { |
200 | clk_disable_unprepare(clk: skt->clk); |
201 | return ret; |
202 | } |
203 | } |
204 | |
205 | for (i = 0; i < ARRAY_SIZE(skt->stat); i++) { |
206 | if (gpio_is_valid(number: skt->stat[i].gpio)) { |
207 | unsigned long flags = GPIOF_IN; |
208 | |
209 | /* CD is active low by default */ |
210 | if (i == SOC_STAT_CD) |
211 | flags |= GPIOF_ACTIVE_LOW; |
212 | |
213 | ret = devm_gpio_request_one(dev: skt->socket.dev.parent, |
214 | gpio: skt->stat[i].gpio, flags, |
215 | label: skt->stat[i].name); |
216 | if (ret) { |
217 | __soc_pcmcia_hw_shutdown(skt, nr: i); |
218 | return ret; |
219 | } |
220 | |
221 | skt->stat[i].desc = gpio_to_desc(gpio: skt->stat[i].gpio); |
222 | } |
223 | |
224 | if (i < SOC_STAT_VS1 && skt->stat[i].desc) { |
225 | int irq = gpiod_to_irq(desc: skt->stat[i].desc); |
226 | |
227 | if (irq > 0) { |
228 | if (i == SOC_STAT_RDY) |
229 | skt->socket.pci_irq = irq; |
230 | else |
231 | skt->stat[i].irq = irq; |
232 | } |
233 | } |
234 | |
235 | if (skt->stat[i].irq) { |
236 | ret = request_irq(irq: skt->stat[i].irq, |
237 | handler: soc_common_pcmcia_interrupt, |
238 | IRQF_TRIGGER_NONE, |
239 | name: skt->stat[i].name, dev: skt); |
240 | if (ret) { |
241 | __soc_pcmcia_hw_shutdown(skt, nr: i); |
242 | return ret; |
243 | } |
244 | } |
245 | } |
246 | |
247 | return ret; |
248 | } |
249 | |
250 | static void soc_pcmcia_hw_enable(struct soc_pcmcia_socket *skt) |
251 | { |
252 | int i; |
253 | |
254 | for (i = 0; i < ARRAY_SIZE(skt->stat); i++) |
255 | if (skt->stat[i].irq) { |
256 | irq_set_irq_type(irq: skt->stat[i].irq, type: IRQ_TYPE_EDGE_RISING); |
257 | irq_set_irq_type(irq: skt->stat[i].irq, type: IRQ_TYPE_EDGE_BOTH); |
258 | } |
259 | } |
260 | |
261 | static void soc_pcmcia_hw_disable(struct soc_pcmcia_socket *skt) |
262 | { |
263 | int i; |
264 | |
265 | for (i = 0; i < ARRAY_SIZE(skt->stat); i++) |
266 | if (skt->stat[i].irq) |
267 | irq_set_irq_type(irq: skt->stat[i].irq, type: IRQ_TYPE_NONE); |
268 | } |
269 | |
270 | /* |
271 | * The CF 3.0 specification says that cards tie VS1 to ground and leave |
272 | * VS2 open. Many implementations do not wire up the VS signals, so we |
273 | * provide hard-coded values as per the CF 3.0 spec. |
274 | */ |
275 | void soc_common_cf_socket_state(struct soc_pcmcia_socket *skt, |
276 | struct pcmcia_state *state) |
277 | { |
278 | state->vs_3v = 1; |
279 | } |
280 | EXPORT_SYMBOL_GPL(soc_common_cf_socket_state); |
281 | |
282 | static unsigned int soc_common_pcmcia_skt_state(struct soc_pcmcia_socket *skt) |
283 | { |
284 | struct pcmcia_state state; |
285 | unsigned int stat; |
286 | |
287 | memset(&state, 0, sizeof(struct pcmcia_state)); |
288 | |
289 | /* Make battery voltage state report 'good' */ |
290 | state.bvd1 = 1; |
291 | state.bvd2 = 1; |
292 | |
293 | if (skt->stat[SOC_STAT_CD].desc) |
294 | state.detect = !!gpiod_get_value(desc: skt->stat[SOC_STAT_CD].desc); |
295 | if (skt->stat[SOC_STAT_RDY].desc) |
296 | state.ready = !!gpiod_get_value(desc: skt->stat[SOC_STAT_RDY].desc); |
297 | if (skt->stat[SOC_STAT_BVD1].desc) |
298 | state.bvd1 = !!gpiod_get_value(desc: skt->stat[SOC_STAT_BVD1].desc); |
299 | if (skt->stat[SOC_STAT_BVD2].desc) |
300 | state.bvd2 = !!gpiod_get_value(desc: skt->stat[SOC_STAT_BVD2].desc); |
301 | if (skt->stat[SOC_STAT_VS1].desc) |
302 | state.vs_3v = !!gpiod_get_value(desc: skt->stat[SOC_STAT_VS1].desc); |
303 | if (skt->stat[SOC_STAT_VS2].desc) |
304 | state.vs_Xv = !!gpiod_get_value(desc: skt->stat[SOC_STAT_VS2].desc); |
305 | |
306 | skt->ops->socket_state(skt, &state); |
307 | |
308 | stat = state.detect ? SS_DETECT : 0; |
309 | stat |= state.ready ? SS_READY : 0; |
310 | stat |= state.wrprot ? SS_WRPROT : 0; |
311 | stat |= state.vs_3v ? SS_3VCARD : 0; |
312 | stat |= state.vs_Xv ? SS_XVCARD : 0; |
313 | |
314 | /* The power status of individual sockets is not available |
315 | * explicitly from the hardware, so we just remember the state |
316 | * and regurgitate it upon request: |
317 | */ |
318 | stat |= skt->cs_state.Vcc ? SS_POWERON : 0; |
319 | |
320 | if (skt->cs_state.flags & SS_IOCARD) |
321 | stat |= state.bvd1 ? 0 : SS_STSCHG; |
322 | else { |
323 | if (state.bvd1 == 0) |
324 | stat |= SS_BATDEAD; |
325 | else if (state.bvd2 == 0) |
326 | stat |= SS_BATWARN; |
327 | } |
328 | return stat; |
329 | } |
330 | |
331 | /* |
332 | * soc_common_pcmcia_config_skt |
333 | * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
334 | * |
335 | * Convert PCMCIA socket state to our socket configure structure. |
336 | */ |
337 | static int soc_common_pcmcia_config_skt( |
338 | struct soc_pcmcia_socket *skt, socket_state_t *state) |
339 | { |
340 | int ret; |
341 | |
342 | ret = skt->ops->configure_socket(skt, state); |
343 | if (ret < 0) { |
344 | pr_err("soc_common_pcmcia: unable to configure socket %d\n" , |
345 | skt->nr); |
346 | /* restore the previous state */ |
347 | WARN_ON(skt->ops->configure_socket(skt, &skt->cs_state)); |
348 | return ret; |
349 | } |
350 | |
351 | if (ret == 0) { |
352 | struct gpio_desc *descs[2]; |
353 | DECLARE_BITMAP(values, 2); |
354 | int n = 0; |
355 | |
356 | if (skt->gpio_reset) { |
357 | descs[n] = skt->gpio_reset; |
358 | __assign_bit(nr: n++, addr: values, value: state->flags & SS_RESET); |
359 | } |
360 | if (skt->gpio_bus_enable) { |
361 | descs[n] = skt->gpio_bus_enable; |
362 | __assign_bit(nr: n++, addr: values, value: state->flags & SS_OUTPUT_ENA); |
363 | } |
364 | |
365 | if (n) |
366 | gpiod_set_array_value_cansleep(array_size: n, desc_array: descs, NULL, value_bitmap: values); |
367 | |
368 | /* |
369 | * This really needs a better solution. The IRQ |
370 | * may or may not be claimed by the driver. |
371 | */ |
372 | if (skt->irq_state != 1 && state->io_irq) { |
373 | skt->irq_state = 1; |
374 | irq_set_irq_type(irq: skt->socket.pci_irq, |
375 | type: IRQ_TYPE_EDGE_FALLING); |
376 | } else if (skt->irq_state == 1 && state->io_irq == 0) { |
377 | skt->irq_state = 0; |
378 | irq_set_irq_type(irq: skt->socket.pci_irq, type: IRQ_TYPE_NONE); |
379 | } |
380 | |
381 | skt->cs_state = *state; |
382 | } |
383 | |
384 | return ret; |
385 | } |
386 | |
387 | /* soc_common_pcmcia_sock_init() |
388 | * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
389 | * |
390 | * (Re-)Initialise the socket, turning on status interrupts |
391 | * and PCMCIA bus. This must wait for power to stabilise |
392 | * so that the card status signals report correctly. |
393 | * |
394 | * Returns: 0 |
395 | */ |
396 | static int soc_common_pcmcia_sock_init(struct pcmcia_socket *sock) |
397 | { |
398 | struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); |
399 | |
400 | debug(skt, 2, "initializing socket\n" ); |
401 | if (skt->ops->socket_init) |
402 | skt->ops->socket_init(skt); |
403 | soc_pcmcia_hw_enable(skt); |
404 | return 0; |
405 | } |
406 | |
407 | |
408 | /* |
409 | * soc_common_pcmcia_suspend() |
410 | * ^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
411 | * |
412 | * Remove power on the socket, disable IRQs from the card. |
413 | * Turn off status interrupts, and disable the PCMCIA bus. |
414 | * |
415 | * Returns: 0 |
416 | */ |
417 | static int soc_common_pcmcia_suspend(struct pcmcia_socket *sock) |
418 | { |
419 | struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); |
420 | |
421 | debug(skt, 2, "suspending socket\n" ); |
422 | |
423 | soc_pcmcia_hw_disable(skt); |
424 | if (skt->ops->socket_suspend) |
425 | skt->ops->socket_suspend(skt); |
426 | |
427 | return 0; |
428 | } |
429 | |
430 | static DEFINE_SPINLOCK(status_lock); |
431 | |
432 | static void soc_common_check_status(struct soc_pcmcia_socket *skt) |
433 | { |
434 | unsigned int events; |
435 | |
436 | debug(skt, 4, "entering PCMCIA monitoring thread\n" ); |
437 | |
438 | do { |
439 | unsigned int status; |
440 | unsigned long flags; |
441 | |
442 | status = soc_common_pcmcia_skt_state(skt); |
443 | |
444 | spin_lock_irqsave(&status_lock, flags); |
445 | events = (status ^ skt->status) & skt->cs_state.csc_mask; |
446 | skt->status = status; |
447 | spin_unlock_irqrestore(lock: &status_lock, flags); |
448 | |
449 | debug(skt, 4, "events: %s%s%s%s%s%s\n" , |
450 | events == 0 ? "<NONE>" : "" , |
451 | events & SS_DETECT ? "DETECT " : "" , |
452 | events & SS_READY ? "READY " : "" , |
453 | events & SS_BATDEAD ? "BATDEAD " : "" , |
454 | events & SS_BATWARN ? "BATWARN " : "" , |
455 | events & SS_STSCHG ? "STSCHG " : "" ); |
456 | |
457 | if (events) |
458 | pcmcia_parse_events(socket: &skt->socket, events); |
459 | } while (events); |
460 | } |
461 | |
462 | /* Let's poll for events in addition to IRQs since IRQ only is unreliable... */ |
463 | static void soc_common_pcmcia_poll_event(struct timer_list *t) |
464 | { |
465 | struct soc_pcmcia_socket *skt = from_timer(skt, t, poll_timer); |
466 | debug(skt, 4, "polling for events\n" ); |
467 | |
468 | mod_timer(timer: &skt->poll_timer, expires: jiffies + SOC_PCMCIA_POLL_PERIOD); |
469 | |
470 | soc_common_check_status(skt); |
471 | } |
472 | |
473 | |
474 | /* |
475 | * Service routine for socket driver interrupts (requested by the |
476 | * low-level PCMCIA init() operation via soc_common_pcmcia_thread()). |
477 | * The actual interrupt-servicing work is performed by |
478 | * soc_common_pcmcia_thread(), largely because the Card Services event- |
479 | * handling code performs scheduling operations which cannot be |
480 | * executed from within an interrupt context. |
481 | */ |
482 | static irqreturn_t soc_common_pcmcia_interrupt(int irq, void *dev) |
483 | { |
484 | struct soc_pcmcia_socket *skt = dev; |
485 | |
486 | debug(skt, 3, "servicing IRQ %d\n" , irq); |
487 | |
488 | soc_common_check_status(skt); |
489 | |
490 | return IRQ_HANDLED; |
491 | } |
492 | |
493 | |
494 | /* |
495 | * Implements the get_status() operation for the in-kernel PCMCIA |
496 | * service (formerly SS_GetStatus in Card Services). Essentially just |
497 | * fills in bits in `status' according to internal driver state or |
498 | * the value of the voltage detect chipselect register. |
499 | * |
500 | * As a debugging note, during card startup, the PCMCIA core issues |
501 | * three set_socket() commands in a row the first with RESET deasserted, |
502 | * the second with RESET asserted, and the last with RESET deasserted |
503 | * again. Following the third set_socket(), a get_status() command will |
504 | * be issued. The kernel is looking for the SS_READY flag (see |
505 | * setup_socket(), reset_socket(), and unreset_socket() in cs.c). |
506 | * |
507 | * Returns: 0 |
508 | */ |
509 | static int |
510 | soc_common_pcmcia_get_status(struct pcmcia_socket *sock, unsigned int *status) |
511 | { |
512 | struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); |
513 | |
514 | skt->status = soc_common_pcmcia_skt_state(skt); |
515 | *status = skt->status; |
516 | |
517 | return 0; |
518 | } |
519 | |
520 | |
521 | /* |
522 | * Implements the set_socket() operation for the in-kernel PCMCIA |
523 | * service (formerly SS_SetSocket in Card Services). We more or |
524 | * less punt all of this work and let the kernel handle the details |
525 | * of power configuration, reset, &c. We also record the value of |
526 | * `state' in order to regurgitate it to the PCMCIA core later. |
527 | */ |
528 | static int soc_common_pcmcia_set_socket( |
529 | struct pcmcia_socket *sock, socket_state_t *state) |
530 | { |
531 | struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); |
532 | |
533 | debug(skt, 2, "mask: %s%s%s%s%s%s flags: %s%s%s%s%s%s Vcc %d Vpp %d irq %d\n" , |
534 | (state->csc_mask == 0) ? "<NONE> " : "" , |
535 | (state->csc_mask & SS_DETECT) ? "DETECT " : "" , |
536 | (state->csc_mask & SS_READY) ? "READY " : "" , |
537 | (state->csc_mask & SS_BATDEAD) ? "BATDEAD " : "" , |
538 | (state->csc_mask & SS_BATWARN) ? "BATWARN " : "" , |
539 | (state->csc_mask & SS_STSCHG) ? "STSCHG " : "" , |
540 | (state->flags == 0) ? "<NONE> " : "" , |
541 | (state->flags & SS_PWR_AUTO) ? "PWR_AUTO " : "" , |
542 | (state->flags & SS_IOCARD) ? "IOCARD " : "" , |
543 | (state->flags & SS_RESET) ? "RESET " : "" , |
544 | (state->flags & SS_SPKR_ENA) ? "SPKR_ENA " : "" , |
545 | (state->flags & SS_OUTPUT_ENA) ? "OUTPUT_ENA " : "" , |
546 | state->Vcc, state->Vpp, state->io_irq); |
547 | |
548 | return soc_common_pcmcia_config_skt(skt, state); |
549 | } |
550 | |
551 | |
552 | /* |
553 | * Implements the set_io_map() operation for the in-kernel PCMCIA |
554 | * service (formerly SS_SetIOMap in Card Services). We configure |
555 | * the map speed as requested, but override the address ranges |
556 | * supplied by Card Services. |
557 | * |
558 | * Returns: 0 on success, -1 on error |
559 | */ |
560 | static int soc_common_pcmcia_set_io_map( |
561 | struct pcmcia_socket *sock, struct pccard_io_map *map) |
562 | { |
563 | struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); |
564 | unsigned short speed = map->speed; |
565 | |
566 | debug(skt, 2, "map %u speed %u start 0x%08llx stop 0x%08llx\n" , |
567 | map->map, map->speed, (unsigned long long)map->start, |
568 | (unsigned long long)map->stop); |
569 | debug(skt, 2, "flags: %s%s%s%s%s%s%s%s\n" , |
570 | (map->flags == 0) ? "<NONE>" : "" , |
571 | (map->flags & MAP_ACTIVE) ? "ACTIVE " : "" , |
572 | (map->flags & MAP_16BIT) ? "16BIT " : "" , |
573 | (map->flags & MAP_AUTOSZ) ? "AUTOSZ " : "" , |
574 | (map->flags & MAP_0WS) ? "0WS " : "" , |
575 | (map->flags & MAP_WRPROT) ? "WRPROT " : "" , |
576 | (map->flags & MAP_USE_WAIT) ? "USE_WAIT " : "" , |
577 | (map->flags & MAP_PREFETCH) ? "PREFETCH " : "" ); |
578 | |
579 | if (map->map >= MAX_IO_WIN) { |
580 | printk(KERN_ERR "%s(): map (%d) out of range\n" , __func__, |
581 | map->map); |
582 | return -1; |
583 | } |
584 | |
585 | if (map->flags & MAP_ACTIVE) { |
586 | if (speed == 0) |
587 | speed = SOC_PCMCIA_IO_ACCESS; |
588 | } else { |
589 | speed = 0; |
590 | } |
591 | |
592 | skt->spd_io[map->map] = speed; |
593 | skt->ops->set_timing(skt); |
594 | |
595 | if (map->stop == 1) |
596 | map->stop = PAGE_SIZE-1; |
597 | |
598 | map->stop -= map->start; |
599 | map->stop += skt->socket.io_offset; |
600 | map->start = skt->socket.io_offset; |
601 | |
602 | return 0; |
603 | } |
604 | |
605 | |
606 | /* |
607 | * Implements the set_mem_map() operation for the in-kernel PCMCIA |
608 | * service (formerly SS_SetMemMap in Card Services). We configure |
609 | * the map speed as requested, but override the address ranges |
610 | * supplied by Card Services. |
611 | * |
612 | * Returns: 0 on success, -ERRNO on error |
613 | */ |
614 | static int soc_common_pcmcia_set_mem_map( |
615 | struct pcmcia_socket *sock, struct pccard_mem_map *map) |
616 | { |
617 | struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); |
618 | struct resource *res; |
619 | unsigned short speed = map->speed; |
620 | |
621 | debug(skt, 2, "map %u speed %u card_start %08x\n" , |
622 | map->map, map->speed, map->card_start); |
623 | debug(skt, 2, "flags: %s%s%s%s%s%s%s%s\n" , |
624 | (map->flags == 0) ? "<NONE>" : "" , |
625 | (map->flags & MAP_ACTIVE) ? "ACTIVE " : "" , |
626 | (map->flags & MAP_16BIT) ? "16BIT " : "" , |
627 | (map->flags & MAP_AUTOSZ) ? "AUTOSZ " : "" , |
628 | (map->flags & MAP_0WS) ? "0WS " : "" , |
629 | (map->flags & MAP_WRPROT) ? "WRPROT " : "" , |
630 | (map->flags & MAP_ATTRIB) ? "ATTRIB " : "" , |
631 | (map->flags & MAP_USE_WAIT) ? "USE_WAIT " : "" ); |
632 | |
633 | if (map->map >= MAX_WIN) |
634 | return -EINVAL; |
635 | |
636 | if (map->flags & MAP_ACTIVE) { |
637 | if (speed == 0) |
638 | speed = 300; |
639 | } else { |
640 | speed = 0; |
641 | } |
642 | |
643 | if (map->flags & MAP_ATTRIB) { |
644 | res = &skt->res_attr; |
645 | skt->spd_attr[map->map] = speed; |
646 | skt->spd_mem[map->map] = 0; |
647 | } else { |
648 | res = &skt->res_mem; |
649 | skt->spd_attr[map->map] = 0; |
650 | skt->spd_mem[map->map] = speed; |
651 | } |
652 | |
653 | skt->ops->set_timing(skt); |
654 | |
655 | map->static_start = res->start + map->card_start; |
656 | |
657 | return 0; |
658 | } |
659 | |
660 | struct bittbl { |
661 | unsigned int mask; |
662 | const char *name; |
663 | }; |
664 | |
665 | static struct bittbl status_bits[] = { |
666 | { SS_WRPROT, "SS_WRPROT" }, |
667 | { SS_BATDEAD, "SS_BATDEAD" }, |
668 | { SS_BATWARN, "SS_BATWARN" }, |
669 | { SS_READY, "SS_READY" }, |
670 | { SS_DETECT, "SS_DETECT" }, |
671 | { SS_POWERON, "SS_POWERON" }, |
672 | { SS_STSCHG, "SS_STSCHG" }, |
673 | { SS_3VCARD, "SS_3VCARD" }, |
674 | { SS_XVCARD, "SS_XVCARD" }, |
675 | }; |
676 | |
677 | static struct bittbl conf_bits[] = { |
678 | { SS_PWR_AUTO, "SS_PWR_AUTO" }, |
679 | { SS_IOCARD, "SS_IOCARD" }, |
680 | { SS_RESET, "SS_RESET" }, |
681 | { SS_DMA_MODE, "SS_DMA_MODE" }, |
682 | { SS_SPKR_ENA, "SS_SPKR_ENA" }, |
683 | { SS_OUTPUT_ENA, "SS_OUTPUT_ENA" }, |
684 | }; |
685 | |
686 | static void dump_bits(char **p, const char *prefix, |
687 | unsigned int val, struct bittbl *bits, int sz) |
688 | { |
689 | char *b = *p; |
690 | int i; |
691 | |
692 | b += sprintf(buf: b, fmt: "%-9s:" , prefix); |
693 | for (i = 0; i < sz; i++) |
694 | if (val & bits[i].mask) |
695 | b += sprintf(buf: b, fmt: " %s" , bits[i].name); |
696 | *b++ = '\n'; |
697 | *p = b; |
698 | } |
699 | |
700 | /* |
701 | * Implements the /sys/class/pcmcia_socket/??/status file. |
702 | * |
703 | * Returns: the number of characters added to the buffer |
704 | */ |
705 | static ssize_t show_status( |
706 | struct device *dev, struct device_attribute *attr, char *buf) |
707 | { |
708 | struct soc_pcmcia_socket *skt = |
709 | container_of(dev, struct soc_pcmcia_socket, socket.dev); |
710 | char *p = buf; |
711 | |
712 | p += sprintf(buf: p, fmt: "slot : %d\n" , skt->nr); |
713 | |
714 | dump_bits(p: &p, prefix: "status" , val: skt->status, |
715 | bits: status_bits, ARRAY_SIZE(status_bits)); |
716 | dump_bits(p: &p, prefix: "csc_mask" , val: skt->cs_state.csc_mask, |
717 | bits: status_bits, ARRAY_SIZE(status_bits)); |
718 | dump_bits(p: &p, prefix: "cs_flags" , val: skt->cs_state.flags, |
719 | bits: conf_bits, ARRAY_SIZE(conf_bits)); |
720 | |
721 | p += sprintf(buf: p, fmt: "Vcc : %d\n" , skt->cs_state.Vcc); |
722 | p += sprintf(buf: p, fmt: "Vpp : %d\n" , skt->cs_state.Vpp); |
723 | p += sprintf(buf: p, fmt: "IRQ : %d (%d)\n" , skt->cs_state.io_irq, |
724 | skt->socket.pci_irq); |
725 | if (skt->ops->show_timing) |
726 | p += skt->ops->show_timing(skt, p); |
727 | |
728 | return p-buf; |
729 | } |
730 | static DEVICE_ATTR(status, S_IRUGO, show_status, NULL); |
731 | |
732 | |
733 | static struct pccard_operations soc_common_pcmcia_operations = { |
734 | .init = soc_common_pcmcia_sock_init, |
735 | .suspend = soc_common_pcmcia_suspend, |
736 | .get_status = soc_common_pcmcia_get_status, |
737 | .set_socket = soc_common_pcmcia_set_socket, |
738 | .set_io_map = soc_common_pcmcia_set_io_map, |
739 | .set_mem_map = soc_common_pcmcia_set_mem_map, |
740 | }; |
741 | |
742 | |
743 | #ifdef CONFIG_CPU_FREQ |
744 | static int soc_common_pcmcia_cpufreq_nb(struct notifier_block *nb, |
745 | unsigned long val, void *data) |
746 | { |
747 | struct soc_pcmcia_socket *skt = container_of(nb, struct soc_pcmcia_socket, cpufreq_nb); |
748 | struct cpufreq_freqs *freqs = data; |
749 | |
750 | return skt->ops->frequency_change(skt, val, freqs); |
751 | } |
752 | #endif |
753 | |
754 | void soc_pcmcia_init_one(struct soc_pcmcia_socket *skt, |
755 | const struct pcmcia_low_level *ops, struct device *dev) |
756 | { |
757 | int i; |
758 | |
759 | skt->ops = ops; |
760 | skt->socket.owner = ops->owner; |
761 | skt->socket.dev.parent = dev; |
762 | skt->socket.pci_irq = NO_IRQ; |
763 | |
764 | for (i = 0; i < ARRAY_SIZE(skt->stat); i++) |
765 | skt->stat[i].gpio = -EINVAL; |
766 | } |
767 | EXPORT_SYMBOL(soc_pcmcia_init_one); |
768 | |
769 | void soc_pcmcia_remove_one(struct soc_pcmcia_socket *skt) |
770 | { |
771 | del_timer_sync(timer: &skt->poll_timer); |
772 | |
773 | pcmcia_unregister_socket(socket: &skt->socket); |
774 | |
775 | #ifdef CONFIG_CPU_FREQ |
776 | if (skt->ops->frequency_change) |
777 | cpufreq_unregister_notifier(nb: &skt->cpufreq_nb, |
778 | CPUFREQ_TRANSITION_NOTIFIER); |
779 | #endif |
780 | |
781 | soc_pcmcia_hw_shutdown(skt); |
782 | |
783 | /* should not be required; violates some lowlevel drivers */ |
784 | soc_common_pcmcia_config_skt(skt, state: &dead_socket); |
785 | |
786 | iounmap(addr: PCI_IOBASE + skt->res_io_io.start); |
787 | release_resource(new: &skt->res_attr); |
788 | release_resource(new: &skt->res_mem); |
789 | release_resource(new: &skt->res_io); |
790 | release_resource(new: &skt->res_skt); |
791 | } |
792 | EXPORT_SYMBOL(soc_pcmcia_remove_one); |
793 | |
794 | int soc_pcmcia_add_one(struct soc_pcmcia_socket *skt) |
795 | { |
796 | int ret; |
797 | |
798 | skt->cs_state = dead_socket; |
799 | |
800 | timer_setup(&skt->poll_timer, soc_common_pcmcia_poll_event, 0); |
801 | skt->poll_timer.expires = jiffies + SOC_PCMCIA_POLL_PERIOD; |
802 | |
803 | ret = request_resource(root: &iomem_resource, new: &skt->res_skt); |
804 | if (ret) |
805 | goto out_err_1; |
806 | |
807 | ret = request_resource(root: &skt->res_skt, new: &skt->res_io); |
808 | if (ret) |
809 | goto out_err_2; |
810 | |
811 | ret = request_resource(root: &skt->res_skt, new: &skt->res_mem); |
812 | if (ret) |
813 | goto out_err_3; |
814 | |
815 | ret = request_resource(root: &skt->res_skt, new: &skt->res_attr); |
816 | if (ret) |
817 | goto out_err_4; |
818 | |
819 | skt->res_io_io = (struct resource) |
820 | DEFINE_RES_IO_NAMED(skt->nr * 0x1000 + 0x10000, 0x1000, |
821 | "PCMCIA I/O" ); |
822 | ret = pci_remap_iospace(res: &skt->res_io_io, phys_addr: skt->res_io.start); |
823 | if (ret) |
824 | goto out_err_5; |
825 | |
826 | /* |
827 | * We initialize default socket timing here, because |
828 | * we are not guaranteed to see a SetIOMap operation at |
829 | * runtime. |
830 | */ |
831 | skt->ops->set_timing(skt); |
832 | |
833 | ret = soc_pcmcia_hw_init(skt); |
834 | if (ret) |
835 | goto out_err_6; |
836 | |
837 | skt->socket.ops = &soc_common_pcmcia_operations; |
838 | skt->socket.features = SS_CAP_STATIC_MAP|SS_CAP_PCCARD; |
839 | skt->socket.resource_ops = &pccard_static_ops; |
840 | skt->socket.irq_mask = 0; |
841 | skt->socket.map_size = PAGE_SIZE; |
842 | skt->socket.io_offset = (unsigned long)skt->res_io_io.start; |
843 | |
844 | skt->status = soc_common_pcmcia_skt_state(skt); |
845 | |
846 | #ifdef CONFIG_CPU_FREQ |
847 | if (skt->ops->frequency_change) { |
848 | skt->cpufreq_nb.notifier_call = soc_common_pcmcia_cpufreq_nb; |
849 | |
850 | ret = cpufreq_register_notifier(nb: &skt->cpufreq_nb, |
851 | CPUFREQ_TRANSITION_NOTIFIER); |
852 | if (ret < 0) |
853 | dev_err(skt->socket.dev.parent, |
854 | "unable to register CPU frequency change notifier for PCMCIA (%d)\n" , |
855 | ret); |
856 | } |
857 | #endif |
858 | |
859 | ret = pcmcia_register_socket(socket: &skt->socket); |
860 | if (ret) |
861 | goto out_err_7; |
862 | |
863 | ret = device_create_file(device: &skt->socket.dev, entry: &dev_attr_status); |
864 | if (ret) |
865 | goto out_err_8; |
866 | |
867 | return ret; |
868 | |
869 | out_err_8: |
870 | del_timer_sync(timer: &skt->poll_timer); |
871 | pcmcia_unregister_socket(socket: &skt->socket); |
872 | |
873 | out_err_7: |
874 | soc_pcmcia_hw_shutdown(skt); |
875 | out_err_6: |
876 | iounmap(addr: PCI_IOBASE + skt->res_io_io.start); |
877 | out_err_5: |
878 | release_resource(new: &skt->res_attr); |
879 | out_err_4: |
880 | release_resource(new: &skt->res_mem); |
881 | out_err_3: |
882 | release_resource(new: &skt->res_io); |
883 | out_err_2: |
884 | release_resource(new: &skt->res_skt); |
885 | out_err_1: |
886 | |
887 | return ret; |
888 | } |
889 | EXPORT_SYMBOL(soc_pcmcia_add_one); |
890 | |
891 | MODULE_AUTHOR("John Dorsey <john+@cs.cmu.edu>" ); |
892 | MODULE_DESCRIPTION("Linux PCMCIA Card Services: Common SoC support" ); |
893 | MODULE_LICENSE("Dual MPL/GPL" ); |
894 | |