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1da177e4 LT |
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 | ||
17b38ebb | 34 | #include <linux/cpufreq.h> |
d9dc8787 | 35 | #include <linux/gpio.h> |
45ca7536 | 36 | #include <linux/gpio/consumer.h> |
1da177e4 | 37 | #include <linux/init.h> |
17b38ebb MRJ |
38 | #include <linux/interrupt.h> |
39 | #include <linux/io.h> | |
40 | #include <linux/irq.h> | |
1da177e4 | 41 | #include <linux/kernel.h> |
1da177e4 | 42 | #include <linux/mm.h> |
17b38ebb MRJ |
43 | #include <linux/module.h> |
44 | #include <linux/moduleparam.h> | |
23d077e2 | 45 | #include <linux/mutex.h> |
ac61b600 | 46 | #include <linux/regulator/consumer.h> |
1da177e4 | 47 | #include <linux/spinlock.h> |
17b38ebb | 48 | #include <linux/timer.h> |
1da177e4 | 49 | |
a09e64fb | 50 | #include <mach/hardware.h> |
1da177e4 LT |
51 | |
52 | #include "soc_common.h" | |
53 | ||
d9dc8787 RK |
54 | static irqreturn_t soc_common_pcmcia_interrupt(int irq, void *dev); |
55 | ||
7d16b658 | 56 | #ifdef CONFIG_PCMCIA_DEBUG |
1da177e4 LT |
57 | |
58 | static int pc_debug; | |
59 | module_param(pc_debug, int, 0644); | |
60 | ||
61 | void soc_pcmcia_debug(struct soc_pcmcia_socket *skt, const char *func, | |
62 | int lvl, const char *fmt, ...) | |
63 | { | |
106665d9 | 64 | struct va_format vaf; |
1da177e4 LT |
65 | va_list args; |
66 | if (pc_debug > lvl) { | |
1da177e4 | 67 | va_start(args, fmt); |
106665d9 JP |
68 | |
69 | vaf.fmt = fmt; | |
70 | vaf.va = &args; | |
71 | ||
72 | printk(KERN_DEBUG "skt%u: %s: %pV", skt->nr, func, &vaf); | |
73 | ||
1da177e4 LT |
74 | va_end(args); |
75 | } | |
76 | } | |
b9f515e3 | 77 | EXPORT_SYMBOL(soc_pcmcia_debug); |
1da177e4 LT |
78 | |
79 | #endif | |
80 | ||
17b38ebb MRJ |
81 | #define to_soc_pcmcia_socket(x) \ |
82 | container_of(x, struct soc_pcmcia_socket, socket) | |
1da177e4 | 83 | |
ac61b600 RK |
84 | int soc_pcmcia_regulator_set(struct soc_pcmcia_socket *skt, |
85 | struct soc_pcmcia_regulator *r, int v) | |
86 | { | |
87 | bool on; | |
88 | int ret; | |
89 | ||
90 | if (!r->reg) | |
91 | return 0; | |
92 | ||
93 | on = v != 0; | |
94 | if (r->on == on) | |
95 | return 0; | |
96 | ||
97 | if (on) { | |
98 | ret = regulator_set_voltage(r->reg, v * 100000, v * 100000); | |
99 | if (ret) { | |
100 | int vout = regulator_get_voltage(r->reg) / 100000; | |
101 | ||
102 | dev_warn(&skt->socket.dev, | |
103 | "CS requested %s=%u.%uV, applying %u.%uV\n", | |
104 | r == &skt->vcc ? "Vcc" : "Vpp", | |
105 | v / 10, v % 10, vout / 10, vout % 10); | |
106 | } | |
107 | ||
108 | ret = regulator_enable(r->reg); | |
109 | } else { | |
110 | regulator_disable(r->reg); | |
111 | } | |
112 | if (ret == 0) | |
113 | r->on = on; | |
114 | ||
115 | return ret; | |
116 | } | |
117 | EXPORT_SYMBOL_GPL(soc_pcmcia_regulator_set); | |
118 | ||
1da177e4 LT |
119 | static unsigned short |
120 | calc_speed(unsigned short *spds, int num, unsigned short dflt) | |
121 | { | |
122 | unsigned short speed = 0; | |
123 | int i; | |
124 | ||
125 | for (i = 0; i < num; i++) | |
126 | if (speed < spds[i]) | |
127 | speed = spds[i]; | |
128 | if (speed == 0) | |
129 | speed = dflt; | |
130 | ||
131 | return speed; | |
132 | } | |
133 | ||
17b38ebb MRJ |
134 | void soc_common_pcmcia_get_timing(struct soc_pcmcia_socket *skt, |
135 | struct soc_pcmcia_timing *timing) | |
1da177e4 | 136 | { |
17b38ebb MRJ |
137 | timing->io = |
138 | calc_speed(skt->spd_io, MAX_IO_WIN, SOC_PCMCIA_IO_ACCESS); | |
139 | timing->mem = | |
140 | calc_speed(skt->spd_mem, MAX_WIN, SOC_PCMCIA_3V_MEM_ACCESS); | |
141 | timing->attr = | |
142 | calc_speed(skt->spd_attr, MAX_WIN, SOC_PCMCIA_3V_MEM_ACCESS); | |
1da177e4 LT |
143 | } |
144 | EXPORT_SYMBOL(soc_common_pcmcia_get_timing); | |
145 | ||
d9dc8787 RK |
146 | static void __soc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt, |
147 | unsigned int nr) | |
148 | { | |
149 | unsigned int i; | |
150 | ||
59ecfefa | 151 | for (i = 0; i < nr; i++) |
d9dc8787 RK |
152 | if (skt->stat[i].irq) |
153 | free_irq(skt->stat[i].irq, skt); | |
d9dc8787 RK |
154 | |
155 | if (skt->ops->hw_shutdown) | |
156 | skt->ops->hw_shutdown(skt); | |
0821c3bc DES |
157 | |
158 | clk_disable_unprepare(skt->clk); | |
d9dc8787 RK |
159 | } |
160 | ||
161 | static void soc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt) | |
162 | { | |
163 | __soc_pcmcia_hw_shutdown(skt, ARRAY_SIZE(skt->stat)); | |
164 | } | |
165 | ||
45ca7536 RK |
166 | int soc_pcmcia_request_gpiods(struct soc_pcmcia_socket *skt) |
167 | { | |
168 | struct device *dev = skt->socket.dev.parent; | |
169 | struct gpio_desc *desc; | |
170 | int i; | |
171 | ||
172 | for (i = 0; i < ARRAY_SIZE(skt->stat); i++) { | |
173 | if (!skt->stat[i].name) | |
174 | continue; | |
175 | ||
176 | desc = devm_gpiod_get(dev, skt->stat[i].name, GPIOD_IN); | |
177 | if (IS_ERR(desc)) { | |
178 | dev_err(dev, "Failed to get GPIO for %s: %ld\n", | |
179 | skt->stat[i].name, PTR_ERR(desc)); | |
180 | return PTR_ERR(desc); | |
181 | } | |
182 | ||
183 | skt->stat[i].desc = desc; | |
184 | } | |
185 | ||
186 | return 0; | |
187 | } | |
188 | EXPORT_SYMBOL_GPL(soc_pcmcia_request_gpiods); | |
189 | ||
d9dc8787 RK |
190 | static int soc_pcmcia_hw_init(struct soc_pcmcia_socket *skt) |
191 | { | |
192 | int ret = 0, i; | |
193 | ||
0821c3bc DES |
194 | clk_prepare_enable(skt->clk); |
195 | ||
d9dc8787 RK |
196 | if (skt->ops->hw_init) { |
197 | ret = skt->ops->hw_init(skt); | |
198 | if (ret) | |
199 | return ret; | |
200 | } | |
201 | ||
202 | for (i = 0; i < ARRAY_SIZE(skt->stat); i++) { | |
203 | if (gpio_is_valid(skt->stat[i].gpio)) { | |
7bfe4978 RK |
204 | unsigned long flags = GPIOF_IN; |
205 | ||
206 | /* CD is active low by default */ | |
207 | if (i == SOC_STAT_CD) | |
208 | flags |= GPIOF_ACTIVE_LOW; | |
209 | ||
59ecfefa | 210 | ret = devm_gpio_request_one(skt->socket.dev.parent, |
7bfe4978 | 211 | skt->stat[i].gpio, flags, |
59ecfefa | 212 | skt->stat[i].name); |
d9dc8787 RK |
213 | if (ret) { |
214 | __soc_pcmcia_hw_shutdown(skt, i); | |
215 | return ret; | |
216 | } | |
217 | ||
45ca7536 RK |
218 | skt->stat[i].desc = gpio_to_desc(skt->stat[i].gpio); |
219 | } | |
220 | ||
221 | if (skt->stat[i].desc) { | |
222 | int irq = gpiod_to_irq(skt->stat[i].desc); | |
d9dc8787 | 223 | |
a4941191 RK |
224 | if (irq > 0) { |
225 | if (i == SOC_STAT_RDY) | |
226 | skt->socket.pci_irq = irq; | |
227 | else | |
228 | skt->stat[i].irq = irq; | |
229 | } | |
d9dc8787 RK |
230 | } |
231 | ||
232 | if (skt->stat[i].irq) { | |
233 | ret = request_irq(skt->stat[i].irq, | |
234 | soc_common_pcmcia_interrupt, | |
235 | IRQF_TRIGGER_NONE, | |
236 | skt->stat[i].name, skt); | |
237 | if (ret) { | |
d9dc8787 RK |
238 | __soc_pcmcia_hw_shutdown(skt, i); |
239 | return ret; | |
240 | } | |
241 | } | |
242 | } | |
243 | ||
244 | return ret; | |
245 | } | |
246 | ||
247 | static void soc_pcmcia_hw_enable(struct soc_pcmcia_socket *skt) | |
248 | { | |
249 | int i; | |
250 | ||
251 | for (i = 0; i < ARRAY_SIZE(skt->stat); i++) | |
252 | if (skt->stat[i].irq) { | |
253 | irq_set_irq_type(skt->stat[i].irq, IRQ_TYPE_EDGE_RISING); | |
254 | irq_set_irq_type(skt->stat[i].irq, IRQ_TYPE_EDGE_BOTH); | |
255 | } | |
256 | } | |
257 | ||
258 | static void soc_pcmcia_hw_disable(struct soc_pcmcia_socket *skt) | |
259 | { | |
260 | int i; | |
261 | ||
262 | for (i = 0; i < ARRAY_SIZE(skt->stat); i++) | |
263 | if (skt->stat[i].irq) | |
264 | irq_set_irq_type(skt->stat[i].irq, IRQ_TYPE_NONE); | |
265 | } | |
266 | ||
a1d05002 RK |
267 | /* |
268 | * The CF 3.0 specification says that cards tie VS1 to ground and leave | |
269 | * VS2 open. Many implementations do not wire up the VS signals, so we | |
270 | * provide hard-coded values as per the CF 3.0 spec. | |
271 | */ | |
272 | void soc_common_cf_socket_state(struct soc_pcmcia_socket *skt, | |
273 | struct pcmcia_state *state) | |
274 | { | |
275 | state->vs_3v = 1; | |
276 | } | |
277 | EXPORT_SYMBOL_GPL(soc_common_cf_socket_state); | |
278 | ||
1da177e4 LT |
279 | static unsigned int soc_common_pcmcia_skt_state(struct soc_pcmcia_socket *skt) |
280 | { | |
281 | struct pcmcia_state state; | |
282 | unsigned int stat; | |
283 | ||
284 | memset(&state, 0, sizeof(struct pcmcia_state)); | |
285 | ||
d9dc8787 RK |
286 | /* Make battery voltage state report 'good' */ |
287 | state.bvd1 = 1; | |
288 | state.bvd2 = 1; | |
289 | ||
45ca7536 | 290 | if (skt->stat[SOC_STAT_CD].desc) |
7bfe4978 | 291 | state.detect = !!gpiod_get_value(skt->stat[SOC_STAT_CD].desc); |
45ca7536 RK |
292 | if (skt->stat[SOC_STAT_RDY].desc) |
293 | state.ready = !!gpiod_get_value(skt->stat[SOC_STAT_RDY].desc); | |
294 | if (skt->stat[SOC_STAT_BVD1].desc) | |
295 | state.bvd1 = !!gpiod_get_value(skt->stat[SOC_STAT_BVD1].desc); | |
296 | if (skt->stat[SOC_STAT_BVD2].desc) | |
297 | state.bvd2 = !!gpiod_get_value(skt->stat[SOC_STAT_BVD2].desc); | |
d9dc8787 | 298 | |
1da177e4 LT |
299 | skt->ops->socket_state(skt, &state); |
300 | ||
301 | stat = state.detect ? SS_DETECT : 0; | |
302 | stat |= state.ready ? SS_READY : 0; | |
303 | stat |= state.wrprot ? SS_WRPROT : 0; | |
304 | stat |= state.vs_3v ? SS_3VCARD : 0; | |
305 | stat |= state.vs_Xv ? SS_XVCARD : 0; | |
306 | ||
307 | /* The power status of individual sockets is not available | |
308 | * explicitly from the hardware, so we just remember the state | |
309 | * and regurgitate it upon request: | |
310 | */ | |
311 | stat |= skt->cs_state.Vcc ? SS_POWERON : 0; | |
312 | ||
313 | if (skt->cs_state.flags & SS_IOCARD) | |
a466ebd2 | 314 | stat |= state.bvd1 ? 0 : SS_STSCHG; |
1da177e4 LT |
315 | else { |
316 | if (state.bvd1 == 0) | |
317 | stat |= SS_BATDEAD; | |
318 | else if (state.bvd2 == 0) | |
319 | stat |= SS_BATWARN; | |
320 | } | |
321 | return stat; | |
322 | } | |
323 | ||
324 | /* | |
325 | * soc_common_pcmcia_config_skt | |
326 | * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | |
327 | * | |
328 | * Convert PCMCIA socket state to our socket configure structure. | |
329 | */ | |
17b38ebb MRJ |
330 | static int soc_common_pcmcia_config_skt( |
331 | struct soc_pcmcia_socket *skt, socket_state_t *state) | |
1da177e4 LT |
332 | { |
333 | int ret; | |
334 | ||
335 | ret = skt->ops->configure_socket(skt, state); | |
6ac95d82 RK |
336 | if (ret < 0) { |
337 | pr_err("soc_common_pcmcia: unable to configure socket %d\n", | |
338 | skt->nr); | |
339 | /* restore the previous state */ | |
340 | WARN_ON(skt->ops->configure_socket(skt, &skt->cs_state)); | |
341 | return ret; | |
342 | } | |
343 | ||
1da177e4 | 344 | if (ret == 0) { |
535e0abc RK |
345 | struct gpio_desc *descs[2]; |
346 | int values[2], n = 0; | |
347 | ||
348 | if (skt->gpio_reset) { | |
349 | descs[n] = skt->gpio_reset; | |
350 | values[n++] = !!(state->flags & SS_RESET); | |
351 | } | |
352 | if (skt->gpio_bus_enable) { | |
353 | descs[n] = skt->gpio_bus_enable; | |
354 | values[n++] = !!(state->flags & SS_OUTPUT_ENA); | |
355 | } | |
356 | ||
357 | if (n) | |
358 | gpiod_set_array_value_cansleep(n, descs, values); | |
359 | ||
1da177e4 LT |
360 | /* |
361 | * This really needs a better solution. The IRQ | |
362 | * may or may not be claimed by the driver. | |
363 | */ | |
364 | if (skt->irq_state != 1 && state->io_irq) { | |
365 | skt->irq_state = 1; | |
dced35ae TG |
366 | irq_set_irq_type(skt->socket.pci_irq, |
367 | IRQ_TYPE_EDGE_FALLING); | |
1da177e4 LT |
368 | } else if (skt->irq_state == 1 && state->io_irq == 0) { |
369 | skt->irq_state = 0; | |
dced35ae | 370 | irq_set_irq_type(skt->socket.pci_irq, IRQ_TYPE_NONE); |
1da177e4 LT |
371 | } |
372 | ||
373 | skt->cs_state = *state; | |
374 | } | |
375 | ||
1da177e4 LT |
376 | return ret; |
377 | } | |
378 | ||
379 | /* soc_common_pcmcia_sock_init() | |
380 | * ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ | |
381 | * | |
382 | * (Re-)Initialise the socket, turning on status interrupts | |
383 | * and PCMCIA bus. This must wait for power to stabilise | |
384 | * so that the card status signals report correctly. | |
385 | * | |
386 | * Returns: 0 | |
387 | */ | |
388 | static int soc_common_pcmcia_sock_init(struct pcmcia_socket *sock) | |
389 | { | |
390 | struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); | |
391 | ||
392 | debug(skt, 2, "initializing socket\n"); | |
a747ce83 JC |
393 | if (skt->ops->socket_init) |
394 | skt->ops->socket_init(skt); | |
d9dc8787 | 395 | soc_pcmcia_hw_enable(skt); |
1da177e4 LT |
396 | return 0; |
397 | } | |
398 | ||
399 | ||
400 | /* | |
401 | * soc_common_pcmcia_suspend() | |
402 | * ^^^^^^^^^^^^^^^^^^^^^^^^^^^ | |
403 | * | |
404 | * Remove power on the socket, disable IRQs from the card. | |
405 | * Turn off status interrupts, and disable the PCMCIA bus. | |
406 | * | |
407 | * Returns: 0 | |
408 | */ | |
409 | static int soc_common_pcmcia_suspend(struct pcmcia_socket *sock) | |
410 | { | |
411 | struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); | |
412 | ||
413 | debug(skt, 2, "suspending socket\n"); | |
414 | ||
d9dc8787 | 415 | soc_pcmcia_hw_disable(skt); |
a747ce83 JC |
416 | if (skt->ops->socket_suspend) |
417 | skt->ops->socket_suspend(skt); | |
1da177e4 LT |
418 | |
419 | return 0; | |
420 | } | |
421 | ||
422 | static DEFINE_SPINLOCK(status_lock); | |
423 | ||
424 | static void soc_common_check_status(struct soc_pcmcia_socket *skt) | |
425 | { | |
426 | unsigned int events; | |
427 | ||
428 | debug(skt, 4, "entering PCMCIA monitoring thread\n"); | |
429 | ||
430 | do { | |
431 | unsigned int status; | |
432 | unsigned long flags; | |
433 | ||
434 | status = soc_common_pcmcia_skt_state(skt); | |
435 | ||
436 | spin_lock_irqsave(&status_lock, flags); | |
437 | events = (status ^ skt->status) & skt->cs_state.csc_mask; | |
438 | skt->status = status; | |
439 | spin_unlock_irqrestore(&status_lock, flags); | |
440 | ||
441 | debug(skt, 4, "events: %s%s%s%s%s%s\n", | |
442 | events == 0 ? "<NONE>" : "", | |
443 | events & SS_DETECT ? "DETECT " : "", | |
444 | events & SS_READY ? "READY " : "", | |
445 | events & SS_BATDEAD ? "BATDEAD " : "", | |
446 | events & SS_BATWARN ? "BATWARN " : "", | |
447 | events & SS_STSCHG ? "STSCHG " : ""); | |
448 | ||
449 | if (events) | |
450 | pcmcia_parse_events(&skt->socket, events); | |
451 | } while (events); | |
452 | } | |
453 | ||
454 | /* Let's poll for events in addition to IRQs since IRQ only is unreliable... */ | |
455 | static void soc_common_pcmcia_poll_event(unsigned long dummy) | |
456 | { | |
457 | struct soc_pcmcia_socket *skt = (struct soc_pcmcia_socket *)dummy; | |
458 | debug(skt, 4, "polling for events\n"); | |
459 | ||
460 | mod_timer(&skt->poll_timer, jiffies + SOC_PCMCIA_POLL_PERIOD); | |
461 | ||
462 | soc_common_check_status(skt); | |
463 | } | |
464 | ||
465 | ||
466 | /* | |
467 | * Service routine for socket driver interrupts (requested by the | |
468 | * low-level PCMCIA init() operation via soc_common_pcmcia_thread()). | |
469 | * The actual interrupt-servicing work is performed by | |
470 | * soc_common_pcmcia_thread(), largely because the Card Services event- | |
471 | * handling code performs scheduling operations which cannot be | |
472 | * executed from within an interrupt context. | |
473 | */ | |
7d12e780 | 474 | static irqreturn_t soc_common_pcmcia_interrupt(int irq, void *dev) |
1da177e4 LT |
475 | { |
476 | struct soc_pcmcia_socket *skt = dev; | |
477 | ||
478 | debug(skt, 3, "servicing IRQ %d\n", irq); | |
479 | ||
480 | soc_common_check_status(skt); | |
481 | ||
482 | return IRQ_HANDLED; | |
483 | } | |
484 | ||
485 | ||
486 | /* | |
487 | * Implements the get_status() operation for the in-kernel PCMCIA | |
488 | * service (formerly SS_GetStatus in Card Services). Essentially just | |
489 | * fills in bits in `status' according to internal driver state or | |
490 | * the value of the voltage detect chipselect register. | |
491 | * | |
492 | * As a debugging note, during card startup, the PCMCIA core issues | |
493 | * three set_socket() commands in a row the first with RESET deasserted, | |
494 | * the second with RESET asserted, and the last with RESET deasserted | |
495 | * again. Following the third set_socket(), a get_status() command will | |
496 | * be issued. The kernel is looking for the SS_READY flag (see | |
497 | * setup_socket(), reset_socket(), and unreset_socket() in cs.c). | |
498 | * | |
499 | * Returns: 0 | |
500 | */ | |
501 | static int | |
502 | soc_common_pcmcia_get_status(struct pcmcia_socket *sock, unsigned int *status) | |
503 | { | |
504 | struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); | |
505 | ||
506 | skt->status = soc_common_pcmcia_skt_state(skt); | |
507 | *status = skt->status; | |
508 | ||
509 | return 0; | |
510 | } | |
511 | ||
512 | ||
1da177e4 LT |
513 | /* |
514 | * Implements the set_socket() operation for the in-kernel PCMCIA | |
515 | * service (formerly SS_SetSocket in Card Services). We more or | |
516 | * less punt all of this work and let the kernel handle the details | |
517 | * of power configuration, reset, &c. We also record the value of | |
518 | * `state' in order to regurgitate it to the PCMCIA core later. | |
1da177e4 | 519 | */ |
17b38ebb MRJ |
520 | static int soc_common_pcmcia_set_socket( |
521 | struct pcmcia_socket *sock, socket_state_t *state) | |
1da177e4 LT |
522 | { |
523 | struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); | |
524 | ||
17b38ebb MRJ |
525 | debug(skt, 2, "mask: %s%s%s%s%s%s flags: %s%s%s%s%s%s Vcc %d Vpp %d irq %d\n", |
526 | (state->csc_mask == 0) ? "<NONE> " : "", | |
527 | (state->csc_mask & SS_DETECT) ? "DETECT " : "", | |
528 | (state->csc_mask & SS_READY) ? "READY " : "", | |
529 | (state->csc_mask & SS_BATDEAD) ? "BATDEAD " : "", | |
530 | (state->csc_mask & SS_BATWARN) ? "BATWARN " : "", | |
531 | (state->csc_mask & SS_STSCHG) ? "STSCHG " : "", | |
532 | (state->flags == 0) ? "<NONE> " : "", | |
533 | (state->flags & SS_PWR_AUTO) ? "PWR_AUTO " : "", | |
534 | (state->flags & SS_IOCARD) ? "IOCARD " : "", | |
535 | (state->flags & SS_RESET) ? "RESET " : "", | |
536 | (state->flags & SS_SPKR_ENA) ? "SPKR_ENA " : "", | |
537 | (state->flags & SS_OUTPUT_ENA) ? "OUTPUT_ENA " : "", | |
1da177e4 LT |
538 | state->Vcc, state->Vpp, state->io_irq); |
539 | ||
540 | return soc_common_pcmcia_config_skt(skt, state); | |
541 | } | |
542 | ||
543 | ||
544 | /* | |
545 | * Implements the set_io_map() operation for the in-kernel PCMCIA | |
546 | * service (formerly SS_SetIOMap in Card Services). We configure | |
547 | * the map speed as requested, but override the address ranges | |
548 | * supplied by Card Services. | |
549 | * | |
550 | * Returns: 0 on success, -1 on error | |
551 | */ | |
17b38ebb MRJ |
552 | static int soc_common_pcmcia_set_io_map( |
553 | struct pcmcia_socket *sock, struct pccard_io_map *map) | |
1da177e4 LT |
554 | { |
555 | struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); | |
556 | unsigned short speed = map->speed; | |
557 | ||
5f784336 WS |
558 | debug(skt, 2, "map %u speed %u start 0x%08llx stop 0x%08llx\n", |
559 | map->map, map->speed, (unsigned long long)map->start, | |
560 | (unsigned long long)map->stop); | |
1da177e4 | 561 | debug(skt, 2, "flags: %s%s%s%s%s%s%s%s\n", |
17b38ebb MRJ |
562 | (map->flags == 0) ? "<NONE>" : "", |
563 | (map->flags & MAP_ACTIVE) ? "ACTIVE " : "", | |
564 | (map->flags & MAP_16BIT) ? "16BIT " : "", | |
565 | (map->flags & MAP_AUTOSZ) ? "AUTOSZ " : "", | |
566 | (map->flags & MAP_0WS) ? "0WS " : "", | |
567 | (map->flags & MAP_WRPROT) ? "WRPROT " : "", | |
568 | (map->flags & MAP_USE_WAIT) ? "USE_WAIT " : "", | |
569 | (map->flags & MAP_PREFETCH) ? "PREFETCH " : ""); | |
1da177e4 LT |
570 | |
571 | if (map->map >= MAX_IO_WIN) { | |
2e11cb4c | 572 | printk(KERN_ERR "%s(): map (%d) out of range\n", __func__, |
1da177e4 LT |
573 | map->map); |
574 | return -1; | |
575 | } | |
576 | ||
577 | if (map->flags & MAP_ACTIVE) { | |
578 | if (speed == 0) | |
579 | speed = SOC_PCMCIA_IO_ACCESS; | |
580 | } else { | |
581 | speed = 0; | |
582 | } | |
583 | ||
584 | skt->spd_io[map->map] = speed; | |
585 | skt->ops->set_timing(skt); | |
586 | ||
587 | if (map->stop == 1) | |
588 | map->stop = PAGE_SIZE-1; | |
589 | ||
590 | map->stop -= map->start; | |
591 | map->stop += skt->socket.io_offset; | |
592 | map->start = skt->socket.io_offset; | |
593 | ||
594 | return 0; | |
595 | } | |
596 | ||
597 | ||
598 | /* | |
599 | * Implements the set_mem_map() operation for the in-kernel PCMCIA | |
600 | * service (formerly SS_SetMemMap in Card Services). We configure | |
601 | * the map speed as requested, but override the address ranges | |
602 | * supplied by Card Services. | |
603 | * | |
4846d017 | 604 | * Returns: 0 on success, -ERRNO on error |
1da177e4 | 605 | */ |
17b38ebb MRJ |
606 | static int soc_common_pcmcia_set_mem_map( |
607 | struct pcmcia_socket *sock, struct pccard_mem_map *map) | |
1da177e4 LT |
608 | { |
609 | struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); | |
610 | struct resource *res; | |
611 | unsigned short speed = map->speed; | |
612 | ||
613 | debug(skt, 2, "map %u speed %u card_start %08x\n", | |
614 | map->map, map->speed, map->card_start); | |
615 | debug(skt, 2, "flags: %s%s%s%s%s%s%s%s\n", | |
17b38ebb MRJ |
616 | (map->flags == 0) ? "<NONE>" : "", |
617 | (map->flags & MAP_ACTIVE) ? "ACTIVE " : "", | |
618 | (map->flags & MAP_16BIT) ? "16BIT " : "", | |
619 | (map->flags & MAP_AUTOSZ) ? "AUTOSZ " : "", | |
620 | (map->flags & MAP_0WS) ? "0WS " : "", | |
621 | (map->flags & MAP_WRPROT) ? "WRPROT " : "", | |
622 | (map->flags & MAP_ATTRIB) ? "ATTRIB " : "", | |
623 | (map->flags & MAP_USE_WAIT) ? "USE_WAIT " : ""); | |
1da177e4 LT |
624 | |
625 | if (map->map >= MAX_WIN) | |
626 | return -EINVAL; | |
627 | ||
628 | if (map->flags & MAP_ACTIVE) { | |
629 | if (speed == 0) | |
630 | speed = 300; | |
631 | } else { | |
632 | speed = 0; | |
633 | } | |
634 | ||
635 | if (map->flags & MAP_ATTRIB) { | |
636 | res = &skt->res_attr; | |
637 | skt->spd_attr[map->map] = speed; | |
638 | skt->spd_mem[map->map] = 0; | |
639 | } else { | |
640 | res = &skt->res_mem; | |
641 | skt->spd_attr[map->map] = 0; | |
642 | skt->spd_mem[map->map] = speed; | |
643 | } | |
644 | ||
645 | skt->ops->set_timing(skt); | |
646 | ||
647 | map->static_start = res->start + map->card_start; | |
648 | ||
649 | return 0; | |
650 | } | |
651 | ||
652 | struct bittbl { | |
653 | unsigned int mask; | |
654 | const char *name; | |
655 | }; | |
656 | ||
657 | static struct bittbl status_bits[] = { | |
658 | { SS_WRPROT, "SS_WRPROT" }, | |
659 | { SS_BATDEAD, "SS_BATDEAD" }, | |
660 | { SS_BATWARN, "SS_BATWARN" }, | |
661 | { SS_READY, "SS_READY" }, | |
662 | { SS_DETECT, "SS_DETECT" }, | |
663 | { SS_POWERON, "SS_POWERON" }, | |
664 | { SS_STSCHG, "SS_STSCHG" }, | |
665 | { SS_3VCARD, "SS_3VCARD" }, | |
666 | { SS_XVCARD, "SS_XVCARD" }, | |
667 | }; | |
668 | ||
669 | static struct bittbl conf_bits[] = { | |
670 | { SS_PWR_AUTO, "SS_PWR_AUTO" }, | |
671 | { SS_IOCARD, "SS_IOCARD" }, | |
672 | { SS_RESET, "SS_RESET" }, | |
673 | { SS_DMA_MODE, "SS_DMA_MODE" }, | |
674 | { SS_SPKR_ENA, "SS_SPKR_ENA" }, | |
675 | { SS_OUTPUT_ENA, "SS_OUTPUT_ENA" }, | |
676 | }; | |
677 | ||
17b38ebb MRJ |
678 | static void dump_bits(char **p, const char *prefix, |
679 | unsigned int val, struct bittbl *bits, int sz) | |
1da177e4 LT |
680 | { |
681 | char *b = *p; | |
682 | int i; | |
683 | ||
684 | b += sprintf(b, "%-9s:", prefix); | |
685 | for (i = 0; i < sz; i++) | |
686 | if (val & bits[i].mask) | |
687 | b += sprintf(b, " %s", bits[i].name); | |
688 | *b++ = '\n'; | |
689 | *p = b; | |
690 | } | |
691 | ||
692 | /* | |
693 | * Implements the /sys/class/pcmcia_socket/??/status file. | |
694 | * | |
695 | * Returns: the number of characters added to the buffer | |
696 | */ | |
17b38ebb MRJ |
697 | static ssize_t show_status( |
698 | struct device *dev, struct device_attribute *attr, char *buf) | |
1da177e4 LT |
699 | { |
700 | struct soc_pcmcia_socket *skt = | |
87373318 | 701 | container_of(dev, struct soc_pcmcia_socket, socket.dev); |
1da177e4 LT |
702 | char *p = buf; |
703 | ||
17b38ebb | 704 | p += sprintf(p, "slot : %d\n", skt->nr); |
1da177e4 LT |
705 | |
706 | dump_bits(&p, "status", skt->status, | |
707 | status_bits, ARRAY_SIZE(status_bits)); | |
708 | dump_bits(&p, "csc_mask", skt->cs_state.csc_mask, | |
709 | status_bits, ARRAY_SIZE(status_bits)); | |
710 | dump_bits(&p, "cs_flags", skt->cs_state.flags, | |
711 | conf_bits, ARRAY_SIZE(conf_bits)); | |
712 | ||
17b38ebb MRJ |
713 | p += sprintf(p, "Vcc : %d\n", skt->cs_state.Vcc); |
714 | p += sprintf(p, "Vpp : %d\n", skt->cs_state.Vpp); | |
715 | p += sprintf(p, "IRQ : %d (%d)\n", skt->cs_state.io_irq, | |
66024db5 | 716 | skt->socket.pci_irq); |
1da177e4 | 717 | if (skt->ops->show_timing) |
17b38ebb | 718 | p += skt->ops->show_timing(skt, p); |
1da177e4 LT |
719 | |
720 | return p-buf; | |
721 | } | |
e4a3c3f0 | 722 | static DEVICE_ATTR(status, S_IRUGO, show_status, NULL); |
1da177e4 LT |
723 | |
724 | ||
725 | static struct pccard_operations soc_common_pcmcia_operations = { | |
726 | .init = soc_common_pcmcia_sock_init, | |
727 | .suspend = soc_common_pcmcia_suspend, | |
728 | .get_status = soc_common_pcmcia_get_status, | |
1da177e4 LT |
729 | .set_socket = soc_common_pcmcia_set_socket, |
730 | .set_io_map = soc_common_pcmcia_set_io_map, | |
731 | .set_mem_map = soc_common_pcmcia_set_mem_map, | |
732 | }; | |
733 | ||
734 | ||
1da177e4 | 735 | #ifdef CONFIG_CPU_FREQ |
fb8c9959 RK |
736 | static int soc_common_pcmcia_cpufreq_nb(struct notifier_block *nb, |
737 | unsigned long val, void *data) | |
1da177e4 | 738 | { |
fb8c9959 | 739 | struct soc_pcmcia_socket *skt = container_of(nb, struct soc_pcmcia_socket, cpufreq_nb); |
1da177e4 | 740 | struct cpufreq_freqs *freqs = data; |
1da177e4 | 741 | |
fb8c9959 | 742 | return skt->ops->frequency_change(skt, val, freqs); |
1da177e4 | 743 | } |
1da177e4 LT |
744 | #endif |
745 | ||
e0d21178 | 746 | void soc_pcmcia_init_one(struct soc_pcmcia_socket *skt, |
c8f9ce55 | 747 | const struct pcmcia_low_level *ops, struct device *dev) |
e0d21178 | 748 | { |
d9dc8787 RK |
749 | int i; |
750 | ||
e0d21178 RK |
751 | skt->ops = ops; |
752 | skt->socket.owner = ops->owner; | |
753 | skt->socket.dev.parent = dev; | |
754 | skt->socket.pci_irq = NO_IRQ; | |
d9dc8787 RK |
755 | |
756 | for (i = 0; i < ARRAY_SIZE(skt->stat); i++) | |
757 | skt->stat[i].gpio = -EINVAL; | |
e0d21178 RK |
758 | } |
759 | EXPORT_SYMBOL(soc_pcmcia_init_one); | |
760 | ||
097e296d | 761 | void soc_pcmcia_remove_one(struct soc_pcmcia_socket *skt) |
1da177e4 | 762 | { |
097e296d | 763 | del_timer_sync(&skt->poll_timer); |
1da177e4 | 764 | |
097e296d | 765 | pcmcia_unregister_socket(&skt->socket); |
1da177e4 | 766 | |
fb8c9959 RK |
767 | #ifdef CONFIG_CPU_FREQ |
768 | if (skt->ops->frequency_change) | |
769 | cpufreq_unregister_notifier(&skt->cpufreq_nb, | |
770 | CPUFREQ_TRANSITION_NOTIFIER); | |
771 | #endif | |
772 | ||
d9dc8787 | 773 | soc_pcmcia_hw_shutdown(skt); |
1da177e4 | 774 | |
d9dc8787 | 775 | /* should not be required; violates some lowlevel drivers */ |
097e296d | 776 | soc_common_pcmcia_config_skt(skt, &dead_socket); |
1da177e4 | 777 | |
097e296d RKAL |
778 | iounmap(skt->virt_io); |
779 | skt->virt_io = NULL; | |
780 | release_resource(&skt->res_attr); | |
781 | release_resource(&skt->res_mem); | |
782 | release_resource(&skt->res_io); | |
783 | release_resource(&skt->res_skt); | |
784 | } | |
785 | EXPORT_SYMBOL(soc_pcmcia_remove_one); | |
1da177e4 | 786 | |
097e296d RKAL |
787 | int soc_pcmcia_add_one(struct soc_pcmcia_socket *skt) |
788 | { | |
789 | int ret; | |
1da177e4 | 790 | |
6ac95d82 RK |
791 | skt->cs_state = dead_socket; |
792 | ||
dae6cdab VT |
793 | setup_timer(&skt->poll_timer, soc_common_pcmcia_poll_event, |
794 | (unsigned long)skt); | |
097e296d | 795 | skt->poll_timer.expires = jiffies + SOC_PCMCIA_POLL_PERIOD; |
1da177e4 | 796 | |
097e296d RKAL |
797 | ret = request_resource(&iomem_resource, &skt->res_skt); |
798 | if (ret) | |
799 | goto out_err_1; | |
1da177e4 | 800 | |
097e296d RKAL |
801 | ret = request_resource(&skt->res_skt, &skt->res_io); |
802 | if (ret) | |
803 | goto out_err_2; | |
1da177e4 | 804 | |
097e296d RKAL |
805 | ret = request_resource(&skt->res_skt, &skt->res_mem); |
806 | if (ret) | |
807 | goto out_err_3; | |
1da177e4 | 808 | |
097e296d RKAL |
809 | ret = request_resource(&skt->res_skt, &skt->res_attr); |
810 | if (ret) | |
811 | goto out_err_4; | |
1da177e4 | 812 | |
097e296d RKAL |
813 | skt->virt_io = ioremap(skt->res_io.start, 0x10000); |
814 | if (skt->virt_io == NULL) { | |
815 | ret = -ENOMEM; | |
816 | goto out_err_5; | |
817 | } | |
1da177e4 | 818 | |
097e296d RKAL |
819 | /* |
820 | * We initialize default socket timing here, because | |
821 | * we are not guaranteed to see a SetIOMap operation at | |
822 | * runtime. | |
823 | */ | |
824 | skt->ops->set_timing(skt); | |
1da177e4 | 825 | |
d9dc8787 | 826 | ret = soc_pcmcia_hw_init(skt); |
097e296d RKAL |
827 | if (ret) |
828 | goto out_err_6; | |
1da177e4 | 829 | |
097e296d RKAL |
830 | skt->socket.ops = &soc_common_pcmcia_operations; |
831 | skt->socket.features = SS_CAP_STATIC_MAP|SS_CAP_PCCARD; | |
832 | skt->socket.resource_ops = &pccard_static_ops; | |
833 | skt->socket.irq_mask = 0; | |
834 | skt->socket.map_size = PAGE_SIZE; | |
097e296d | 835 | skt->socket.io_offset = (unsigned long)skt->virt_io; |
1da177e4 | 836 | |
097e296d | 837 | skt->status = soc_common_pcmcia_skt_state(skt); |
1da177e4 | 838 | |
fb8c9959 RK |
839 | #ifdef CONFIG_CPU_FREQ |
840 | if (skt->ops->frequency_change) { | |
841 | skt->cpufreq_nb.notifier_call = soc_common_pcmcia_cpufreq_nb; | |
842 | ||
843 | ret = cpufreq_register_notifier(&skt->cpufreq_nb, | |
844 | CPUFREQ_TRANSITION_NOTIFIER); | |
845 | if (ret < 0) | |
846 | dev_err(skt->socket.dev.parent, | |
847 | "unable to register CPU frequency change notifier for PCMCIA (%d)\n", | |
848 | ret); | |
849 | } | |
850 | #endif | |
851 | ||
097e296d RKAL |
852 | ret = pcmcia_register_socket(&skt->socket); |
853 | if (ret) | |
854 | goto out_err_7; | |
855 | ||
097e296d RKAL |
856 | ret = device_create_file(&skt->socket.dev, &dev_attr_status); |
857 | if (ret) | |
858 | goto out_err_8; | |
859 | ||
860 | return ret; | |
1da177e4 | 861 | |
632480ea | 862 | out_err_8: |
097e296d RKAL |
863 | del_timer_sync(&skt->poll_timer); |
864 | pcmcia_unregister_socket(&skt->socket); | |
1da177e4 LT |
865 | |
866 | out_err_7: | |
d9dc8787 | 867 | soc_pcmcia_hw_shutdown(skt); |
1da177e4 | 868 | out_err_6: |
097e296d | 869 | iounmap(skt->virt_io); |
1da177e4 | 870 | out_err_5: |
097e296d | 871 | release_resource(&skt->res_attr); |
1da177e4 | 872 | out_err_4: |
097e296d | 873 | release_resource(&skt->res_mem); |
1da177e4 | 874 | out_err_3: |
097e296d | 875 | release_resource(&skt->res_io); |
1da177e4 | 876 | out_err_2: |
097e296d | 877 | release_resource(&skt->res_skt); |
1da177e4 | 878 | out_err_1: |
1da177e4 | 879 | |
1da177e4 LT |
880 | return ret; |
881 | } | |
097e296d | 882 | EXPORT_SYMBOL(soc_pcmcia_add_one); |
1da177e4 | 883 | |
0f767de6 RKAL |
884 | MODULE_AUTHOR("John Dorsey <john+@cs.cmu.edu>"); |
885 | MODULE_DESCRIPTION("Linux PCMCIA Card Services: Common SoC support"); | |
886 | MODULE_LICENSE("Dual MPL/GPL"); |