Commit | Line | Data |
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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> |
645b3026 | 49 | #include <linux/pci.h> |
1da177e4 | 50 | |
1da177e4 LT |
51 | #include "soc_common.h" |
52 | ||
d9dc8787 RK |
53 | static irqreturn_t soc_common_pcmcia_interrupt(int irq, void *dev); |
54 | ||
7d16b658 | 55 | #ifdef CONFIG_PCMCIA_DEBUG |
1da177e4 LT |
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 | { | |
106665d9 | 63 | struct va_format vaf; |
1da177e4 LT |
64 | va_list args; |
65 | if (pc_debug > lvl) { | |
1da177e4 | 66 | va_start(args, fmt); |
106665d9 JP |
67 | |
68 | vaf.fmt = fmt; | |
69 | vaf.va = &args; | |
70 | ||
71 | printk(KERN_DEBUG "skt%u: %s: %pV", skt->nr, func, &vaf); | |
72 | ||
1da177e4 LT |
73 | va_end(args); |
74 | } | |
75 | } | |
b9f515e3 | 76 | EXPORT_SYMBOL(soc_pcmcia_debug); |
1da177e4 LT |
77 | |
78 | #endif | |
79 | ||
17b38ebb MRJ |
80 | #define to_soc_pcmcia_socket(x) \ |
81 | container_of(x, struct soc_pcmcia_socket, socket) | |
1da177e4 | 82 | |
ac61b600 RK |
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(r->reg, v * 100000, v * 100000); | |
98 | if (ret) { | |
99 | int vout = regulator_get_voltage(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(r->reg); | |
108 | } else { | |
75ed2687 | 109 | ret = regulator_disable(r->reg); |
ac61b600 RK |
110 | } |
111 | if (ret == 0) | |
112 | r->on = on; | |
113 | ||
114 | return ret; | |
115 | } | |
116 | EXPORT_SYMBOL_GPL(soc_pcmcia_regulator_set); | |
117 | ||
1da177e4 LT |
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 | ||
17b38ebb MRJ |
133 | void soc_common_pcmcia_get_timing(struct soc_pcmcia_socket *skt, |
134 | struct soc_pcmcia_timing *timing) | |
1da177e4 | 135 | { |
17b38ebb MRJ |
136 | timing->io = |
137 | calc_speed(skt->spd_io, MAX_IO_WIN, SOC_PCMCIA_IO_ACCESS); | |
138 | timing->mem = | |
139 | calc_speed(skt->spd_mem, MAX_WIN, SOC_PCMCIA_3V_MEM_ACCESS); | |
140 | timing->attr = | |
141 | calc_speed(skt->spd_attr, MAX_WIN, SOC_PCMCIA_3V_MEM_ACCESS); | |
1da177e4 LT |
142 | } |
143 | EXPORT_SYMBOL(soc_common_pcmcia_get_timing); | |
144 | ||
d9dc8787 RK |
145 | static void __soc_pcmcia_hw_shutdown(struct soc_pcmcia_socket *skt, |
146 | unsigned int nr) | |
147 | { | |
148 | unsigned int i; | |
149 | ||
59ecfefa | 150 | for (i = 0; i < nr; i++) |
d9dc8787 RK |
151 | if (skt->stat[i].irq) |
152 | free_irq(skt->stat[i].irq, skt); | |
d9dc8787 RK |
153 | |
154 | if (skt->ops->hw_shutdown) | |
155 | skt->ops->hw_shutdown(skt); | |
0821c3bc DES |
156 | |
157 | clk_disable_unprepare(skt->clk); | |
d9dc8787 RK |
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 | ||
45ca7536 RK |
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, skt->stat[i].name, GPIOD_IN); | |
176 | if (IS_ERR(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(desc); | |
180 | } | |
181 | ||
182 | skt->stat[i].desc = desc; | |
183 | } | |
184 | ||
185 | return 0; | |
186 | } | |
187 | EXPORT_SYMBOL_GPL(soc_pcmcia_request_gpiods); | |
188 | ||
d9dc8787 RK |
189 | static int soc_pcmcia_hw_init(struct soc_pcmcia_socket *skt) |
190 | { | |
191 | int ret = 0, i; | |
192 | ||
d3fdd701 AY |
193 | ret = clk_prepare_enable(skt->clk); |
194 | if (ret) | |
195 | return ret; | |
0821c3bc | 196 | |
d9dc8787 RK |
197 | if (skt->ops->hw_init) { |
198 | ret = skt->ops->hw_init(skt); | |
d3fdd701 AY |
199 | if (ret) { |
200 | clk_disable_unprepare(skt->clk); | |
d9dc8787 | 201 | return ret; |
d3fdd701 | 202 | } |
d9dc8787 RK |
203 | } |
204 | ||
205 | for (i = 0; i < ARRAY_SIZE(skt->stat); i++) { | |
206 | if (gpio_is_valid(skt->stat[i].gpio)) { | |
7bfe4978 RK |
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 | ||
59ecfefa | 213 | ret = devm_gpio_request_one(skt->socket.dev.parent, |
7bfe4978 | 214 | skt->stat[i].gpio, flags, |
59ecfefa | 215 | skt->stat[i].name); |
d9dc8787 RK |
216 | if (ret) { |
217 | __soc_pcmcia_hw_shutdown(skt, i); | |
218 | return ret; | |
219 | } | |
220 | ||
45ca7536 RK |
221 | skt->stat[i].desc = gpio_to_desc(skt->stat[i].gpio); |
222 | } | |
223 | ||
5805271d | 224 | if (i < SOC_STAT_VS1 && skt->stat[i].desc) { |
45ca7536 | 225 | int irq = gpiod_to_irq(skt->stat[i].desc); |
d9dc8787 | 226 | |
a4941191 RK |
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 | } | |
d9dc8787 RK |
233 | } |
234 | ||
235 | if (skt->stat[i].irq) { | |
236 | ret = request_irq(skt->stat[i].irq, | |
237 | soc_common_pcmcia_interrupt, | |
238 | IRQF_TRIGGER_NONE, | |
239 | skt->stat[i].name, skt); | |
240 | if (ret) { | |
d9dc8787 RK |
241 | __soc_pcmcia_hw_shutdown(skt, 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(skt->stat[i].irq, IRQ_TYPE_EDGE_RISING); | |
257 | irq_set_irq_type(skt->stat[i].irq, 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(skt->stat[i].irq, IRQ_TYPE_NONE); | |
268 | } | |
269 | ||
a1d05002 RK |
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 | ||
1da177e4 LT |
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 | ||
d9dc8787 RK |
289 | /* Make battery voltage state report 'good' */ |
290 | state.bvd1 = 1; | |
291 | state.bvd2 = 1; | |
292 | ||
45ca7536 | 293 | if (skt->stat[SOC_STAT_CD].desc) |
7bfe4978 | 294 | state.detect = !!gpiod_get_value(skt->stat[SOC_STAT_CD].desc); |
45ca7536 RK |
295 | if (skt->stat[SOC_STAT_RDY].desc) |
296 | state.ready = !!gpiod_get_value(skt->stat[SOC_STAT_RDY].desc); | |
297 | if (skt->stat[SOC_STAT_BVD1].desc) | |
298 | state.bvd1 = !!gpiod_get_value(skt->stat[SOC_STAT_BVD1].desc); | |
299 | if (skt->stat[SOC_STAT_BVD2].desc) | |
300 | state.bvd2 = !!gpiod_get_value(skt->stat[SOC_STAT_BVD2].desc); | |
5805271d RK |
301 | if (skt->stat[SOC_STAT_VS1].desc) |
302 | state.vs_3v = !!gpiod_get_value(skt->stat[SOC_STAT_VS1].desc); | |
303 | if (skt->stat[SOC_STAT_VS2].desc) | |
304 | state.vs_Xv = !!gpiod_get_value(skt->stat[SOC_STAT_VS2].desc); | |
d9dc8787 | 305 | |
1da177e4 LT |
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) | |
a466ebd2 | 321 | stat |= state.bvd1 ? 0 : SS_STSCHG; |
1da177e4 LT |
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 | */ | |
17b38ebb MRJ |
337 | static int soc_common_pcmcia_config_skt( |
338 | struct soc_pcmcia_socket *skt, socket_state_t *state) | |
1da177e4 LT |
339 | { |
340 | int ret; | |
341 | ||
342 | ret = skt->ops->configure_socket(skt, state); | |
6ac95d82 RK |
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 | ||
1da177e4 | 351 | if (ret == 0) { |
535e0abc | 352 | struct gpio_desc *descs[2]; |
b9762beb JK |
353 | DECLARE_BITMAP(values, 2); |
354 | int n = 0; | |
535e0abc RK |
355 | |
356 | if (skt->gpio_reset) { | |
357 | descs[n] = skt->gpio_reset; | |
b9762beb | 358 | __assign_bit(n++, values, state->flags & SS_RESET); |
535e0abc RK |
359 | } |
360 | if (skt->gpio_bus_enable) { | |
361 | descs[n] = skt->gpio_bus_enable; | |
b9762beb | 362 | __assign_bit(n++, values, state->flags & SS_OUTPUT_ENA); |
535e0abc RK |
363 | } |
364 | ||
365 | if (n) | |
77588c14 | 366 | gpiod_set_array_value_cansleep(n, descs, NULL, values); |
535e0abc | 367 | |
1da177e4 LT |
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; | |
dced35ae TG |
374 | irq_set_irq_type(skt->socket.pci_irq, |
375 | IRQ_TYPE_EDGE_FALLING); | |
1da177e4 LT |
376 | } else if (skt->irq_state == 1 && state->io_irq == 0) { |
377 | skt->irq_state = 0; | |
dced35ae | 378 | irq_set_irq_type(skt->socket.pci_irq, IRQ_TYPE_NONE); |
1da177e4 LT |
379 | } |
380 | ||
381 | skt->cs_state = *state; | |
382 | } | |
383 | ||
1da177e4 LT |
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"); | |
a747ce83 JC |
401 | if (skt->ops->socket_init) |
402 | skt->ops->socket_init(skt); | |
d9dc8787 | 403 | soc_pcmcia_hw_enable(skt); |
1da177e4 LT |
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 | ||
d9dc8787 | 423 | soc_pcmcia_hw_disable(skt); |
a747ce83 JC |
424 | if (skt->ops->socket_suspend) |
425 | skt->ops->socket_suspend(skt); | |
1da177e4 LT |
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(&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(&skt->socket, events); | |
459 | } while (events); | |
460 | } | |
461 | ||
462 | /* Let's poll for events in addition to IRQs since IRQ only is unreliable... */ | |
41760d0e | 463 | static void soc_common_pcmcia_poll_event(struct timer_list *t) |
1da177e4 | 464 | { |
41760d0e | 465 | struct soc_pcmcia_socket *skt = from_timer(skt, t, poll_timer); |
1da177e4 LT |
466 | debug(skt, 4, "polling for events\n"); |
467 | ||
468 | mod_timer(&skt->poll_timer, 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 | */ | |
7d12e780 | 482 | static irqreturn_t soc_common_pcmcia_interrupt(int irq, void *dev) |
1da177e4 LT |
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 | ||
1da177e4 LT |
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. | |
1da177e4 | 527 | */ |
17b38ebb MRJ |
528 | static int soc_common_pcmcia_set_socket( |
529 | struct pcmcia_socket *sock, socket_state_t *state) | |
1da177e4 LT |
530 | { |
531 | struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); | |
532 | ||
17b38ebb MRJ |
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 " : "", | |
1da177e4 LT |
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 | */ | |
17b38ebb MRJ |
560 | static int soc_common_pcmcia_set_io_map( |
561 | struct pcmcia_socket *sock, struct pccard_io_map *map) | |
1da177e4 LT |
562 | { |
563 | struct soc_pcmcia_socket *skt = to_soc_pcmcia_socket(sock); | |
564 | unsigned short speed = map->speed; | |
565 | ||
5f784336 WS |
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); | |
1da177e4 | 569 | debug(skt, 2, "flags: %s%s%s%s%s%s%s%s\n", |
17b38ebb MRJ |
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 " : ""); | |
1da177e4 LT |
578 | |
579 | if (map->map >= MAX_IO_WIN) { | |
2e11cb4c | 580 | printk(KERN_ERR "%s(): map (%d) out of range\n", __func__, |
1da177e4 LT |
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 | * | |
4846d017 | 612 | * Returns: 0 on success, -ERRNO on error |
1da177e4 | 613 | */ |
17b38ebb MRJ |
614 | static int soc_common_pcmcia_set_mem_map( |
615 | struct pcmcia_socket *sock, struct pccard_mem_map *map) | |
1da177e4 LT |
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", | |
17b38ebb MRJ |
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 " : ""); | |
1da177e4 LT |
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 | ||
17b38ebb MRJ |
686 | static void dump_bits(char **p, const char *prefix, |
687 | unsigned int val, struct bittbl *bits, int sz) | |
1da177e4 LT |
688 | { |
689 | char *b = *p; | |
690 | int i; | |
691 | ||
692 | b += sprintf(b, "%-9s:", prefix); | |
693 | for (i = 0; i < sz; i++) | |
694 | if (val & bits[i].mask) | |
695 | b += sprintf(b, " %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 | */ | |
17b38ebb MRJ |
705 | static ssize_t show_status( |
706 | struct device *dev, struct device_attribute *attr, char *buf) | |
1da177e4 LT |
707 | { |
708 | struct soc_pcmcia_socket *skt = | |
87373318 | 709 | container_of(dev, struct soc_pcmcia_socket, socket.dev); |
1da177e4 LT |
710 | char *p = buf; |
711 | ||
17b38ebb | 712 | p += sprintf(p, "slot : %d\n", skt->nr); |
1da177e4 LT |
713 | |
714 | dump_bits(&p, "status", skt->status, | |
715 | status_bits, ARRAY_SIZE(status_bits)); | |
716 | dump_bits(&p, "csc_mask", skt->cs_state.csc_mask, | |
717 | status_bits, ARRAY_SIZE(status_bits)); | |
718 | dump_bits(&p, "cs_flags", skt->cs_state.flags, | |
719 | conf_bits, ARRAY_SIZE(conf_bits)); | |
720 | ||
17b38ebb MRJ |
721 | p += sprintf(p, "Vcc : %d\n", skt->cs_state.Vcc); |
722 | p += sprintf(p, "Vpp : %d\n", skt->cs_state.Vpp); | |
723 | p += sprintf(p, "IRQ : %d (%d)\n", skt->cs_state.io_irq, | |
66024db5 | 724 | skt->socket.pci_irq); |
1da177e4 | 725 | if (skt->ops->show_timing) |
17b38ebb | 726 | p += skt->ops->show_timing(skt, p); |
1da177e4 LT |
727 | |
728 | return p-buf; | |
729 | } | |
e4a3c3f0 | 730 | static DEVICE_ATTR(status, S_IRUGO, show_status, NULL); |
1da177e4 LT |
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, | |
1da177e4 LT |
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 | ||
1da177e4 | 743 | #ifdef CONFIG_CPU_FREQ |
fb8c9959 RK |
744 | static int soc_common_pcmcia_cpufreq_nb(struct notifier_block *nb, |
745 | unsigned long val, void *data) | |
1da177e4 | 746 | { |
fb8c9959 | 747 | struct soc_pcmcia_socket *skt = container_of(nb, struct soc_pcmcia_socket, cpufreq_nb); |
1da177e4 | 748 | struct cpufreq_freqs *freqs = data; |
1da177e4 | 749 | |
fb8c9959 | 750 | return skt->ops->frequency_change(skt, val, freqs); |
1da177e4 | 751 | } |
1da177e4 LT |
752 | #endif |
753 | ||
e0d21178 | 754 | void soc_pcmcia_init_one(struct soc_pcmcia_socket *skt, |
c8f9ce55 | 755 | const struct pcmcia_low_level *ops, struct device *dev) |
e0d21178 | 756 | { |
d9dc8787 RK |
757 | int i; |
758 | ||
e0d21178 RK |
759 | skt->ops = ops; |
760 | skt->socket.owner = ops->owner; | |
761 | skt->socket.dev.parent = dev; | |
762 | skt->socket.pci_irq = NO_IRQ; | |
d9dc8787 RK |
763 | |
764 | for (i = 0; i < ARRAY_SIZE(skt->stat); i++) | |
765 | skt->stat[i].gpio = -EINVAL; | |
e0d21178 RK |
766 | } |
767 | EXPORT_SYMBOL(soc_pcmcia_init_one); | |
768 | ||
097e296d | 769 | void soc_pcmcia_remove_one(struct soc_pcmcia_socket *skt) |
1da177e4 | 770 | { |
097e296d | 771 | del_timer_sync(&skt->poll_timer); |
1da177e4 | 772 | |
097e296d | 773 | pcmcia_unregister_socket(&skt->socket); |
1da177e4 | 774 | |
fb8c9959 RK |
775 | #ifdef CONFIG_CPU_FREQ |
776 | if (skt->ops->frequency_change) | |
777 | cpufreq_unregister_notifier(&skt->cpufreq_nb, | |
778 | CPUFREQ_TRANSITION_NOTIFIER); | |
779 | #endif | |
780 | ||
d9dc8787 | 781 | soc_pcmcia_hw_shutdown(skt); |
1da177e4 | 782 | |
d9dc8787 | 783 | /* should not be required; violates some lowlevel drivers */ |
097e296d | 784 | soc_common_pcmcia_config_skt(skt, &dead_socket); |
1da177e4 | 785 | |
645b3026 | 786 | iounmap(PCI_IOBASE + skt->res_io_io.start); |
097e296d RKAL |
787 | release_resource(&skt->res_attr); |
788 | release_resource(&skt->res_mem); | |
789 | release_resource(&skt->res_io); | |
790 | release_resource(&skt->res_skt); | |
791 | } | |
792 | EXPORT_SYMBOL(soc_pcmcia_remove_one); | |
1da177e4 | 793 | |
097e296d RKAL |
794 | int soc_pcmcia_add_one(struct soc_pcmcia_socket *skt) |
795 | { | |
796 | int ret; | |
1da177e4 | 797 | |
6ac95d82 RK |
798 | skt->cs_state = dead_socket; |
799 | ||
41760d0e | 800 | timer_setup(&skt->poll_timer, soc_common_pcmcia_poll_event, 0); |
097e296d | 801 | skt->poll_timer.expires = jiffies + SOC_PCMCIA_POLL_PERIOD; |
1da177e4 | 802 | |
097e296d RKAL |
803 | ret = request_resource(&iomem_resource, &skt->res_skt); |
804 | if (ret) | |
805 | goto out_err_1; | |
1da177e4 | 806 | |
097e296d RKAL |
807 | ret = request_resource(&skt->res_skt, &skt->res_io); |
808 | if (ret) | |
809 | goto out_err_2; | |
1da177e4 | 810 | |
097e296d RKAL |
811 | ret = request_resource(&skt->res_skt, &skt->res_mem); |
812 | if (ret) | |
813 | goto out_err_3; | |
1da177e4 | 814 | |
097e296d RKAL |
815 | ret = request_resource(&skt->res_skt, &skt->res_attr); |
816 | if (ret) | |
817 | goto out_err_4; | |
1da177e4 | 818 | |
645b3026 AB |
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(&skt->res_io_io, skt->res_io.start); | |
823 | if (ret) | |
097e296d | 824 | goto out_err_5; |
1da177e4 | 825 | |
097e296d RKAL |
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); | |
1da177e4 | 832 | |
d9dc8787 | 833 | ret = soc_pcmcia_hw_init(skt); |
097e296d RKAL |
834 | if (ret) |
835 | goto out_err_6; | |
1da177e4 | 836 | |
097e296d RKAL |
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; | |
645b3026 | 842 | skt->socket.io_offset = (unsigned long)skt->res_io_io.start; |
1da177e4 | 843 | |
097e296d | 844 | skt->status = soc_common_pcmcia_skt_state(skt); |
1da177e4 | 845 | |
fb8c9959 RK |
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(&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 | ||
097e296d RKAL |
859 | ret = pcmcia_register_socket(&skt->socket); |
860 | if (ret) | |
861 | goto out_err_7; | |
862 | ||
097e296d RKAL |
863 | ret = device_create_file(&skt->socket.dev, &dev_attr_status); |
864 | if (ret) | |
865 | goto out_err_8; | |
866 | ||
867 | return ret; | |
1da177e4 | 868 | |
632480ea | 869 | out_err_8: |
097e296d RKAL |
870 | del_timer_sync(&skt->poll_timer); |
871 | pcmcia_unregister_socket(&skt->socket); | |
1da177e4 LT |
872 | |
873 | out_err_7: | |
d9dc8787 | 874 | soc_pcmcia_hw_shutdown(skt); |
1da177e4 | 875 | out_err_6: |
645b3026 | 876 | iounmap(PCI_IOBASE + skt->res_io_io.start); |
1da177e4 | 877 | out_err_5: |
097e296d | 878 | release_resource(&skt->res_attr); |
1da177e4 | 879 | out_err_4: |
097e296d | 880 | release_resource(&skt->res_mem); |
1da177e4 | 881 | out_err_3: |
097e296d | 882 | release_resource(&skt->res_io); |
1da177e4 | 883 | out_err_2: |
097e296d | 884 | release_resource(&skt->res_skt); |
1da177e4 | 885 | out_err_1: |
1da177e4 | 886 | |
1da177e4 LT |
887 | return ret; |
888 | } | |
097e296d | 889 | EXPORT_SYMBOL(soc_pcmcia_add_one); |
1da177e4 | 890 | |
0f767de6 RKAL |
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"); |