1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * PCMCIA 16-bit resource management functions |
4 | * |
5 | * The initial developer of the original code is David A. Hinds |
6 | * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds |
7 | * are Copyright (C) 1999 David A. Hinds. All Rights Reserved. |
8 | * |
9 | * Copyright (C) 1999 David A. Hinds |
10 | * Copyright (C) 2004-2010 Dominik Brodowski |
11 | */ |
12 | |
13 | #include <linux/module.h> |
14 | #include <linux/kernel.h> |
15 | #include <linux/interrupt.h> |
16 | #include <linux/delay.h> |
17 | #include <linux/pci.h> |
18 | #include <linux/device.h> |
19 | #include <linux/netdevice.h> |
20 | #include <linux/slab.h> |
21 | |
22 | #include <asm/irq.h> |
23 | |
24 | #include <pcmcia/ss.h> |
25 | #include <pcmcia/cistpl.h> |
26 | #include <pcmcia/cisreg.h> |
27 | #include <pcmcia/ds.h> |
28 | |
29 | #include "cs_internal.h" |
30 | |
31 | |
32 | /* Access speed for IO windows */ |
33 | static int io_speed; |
34 | module_param(io_speed, int, 0444); |
35 | |
36 | |
37 | int pcmcia_validate_mem(struct pcmcia_socket *s) |
38 | { |
39 | if (s->resource_ops->validate_mem) |
40 | return s->resource_ops->validate_mem(s); |
41 | /* if there is no callback, we can assume that everything is OK */ |
42 | return 0; |
43 | } |
44 | |
45 | struct resource *pcmcia_find_mem_region(u_long base, u_long num, u_long align, |
46 | int low, struct pcmcia_socket *s) |
47 | { |
48 | if (s->resource_ops->find_mem) |
49 | return s->resource_ops->find_mem(base, num, align, low, s); |
50 | return NULL; |
51 | } |
52 | |
53 | |
54 | /** |
55 | * release_io_space() - release IO ports allocated with alloc_io_space() |
56 | * @s: pcmcia socket |
57 | * @res: resource to release |
58 | * |
59 | */ |
60 | static void release_io_space(struct pcmcia_socket *s, struct resource *res) |
61 | { |
62 | resource_size_t num = resource_size(res); |
63 | int i; |
64 | |
65 | dev_dbg(&s->dev, "release_io_space for %pR\n" , res); |
66 | |
67 | for (i = 0; i < MAX_IO_WIN; i++) { |
68 | if (!s->io[i].res) |
69 | continue; |
70 | if ((s->io[i].res->start <= res->start) && |
71 | (s->io[i].res->end >= res->end)) { |
72 | s->io[i].InUse -= num; |
73 | if (res->parent) |
74 | release_resource(new: res); |
75 | res->start = res->end = 0; |
76 | res->flags = IORESOURCE_IO; |
77 | /* Free the window if no one else is using it */ |
78 | if (s->io[i].InUse == 0) { |
79 | release_resource(new: s->io[i].res); |
80 | kfree(objp: s->io[i].res); |
81 | s->io[i].res = NULL; |
82 | } |
83 | } |
84 | } |
85 | } |
86 | |
87 | |
88 | /** |
89 | * alloc_io_space() - allocate IO ports for use by a PCMCIA device |
90 | * @s: pcmcia socket |
91 | * @res: resource to allocate (begin: begin, end: size) |
92 | * @lines: number of IO lines decoded by the PCMCIA card |
93 | * |
94 | * Special stuff for managing IO windows, because they are scarce |
95 | */ |
96 | static int alloc_io_space(struct pcmcia_socket *s, struct resource *res, |
97 | unsigned int lines) |
98 | { |
99 | unsigned int align; |
100 | unsigned int base = res->start; |
101 | unsigned int num = res->end; |
102 | int ret; |
103 | |
104 | res->flags |= IORESOURCE_IO; |
105 | |
106 | dev_dbg(&s->dev, "alloc_io_space request for %pR, %d lines\n" , |
107 | res, lines); |
108 | |
109 | align = base ? (lines ? 1<<lines : 0) : 1; |
110 | if (align && (align < num)) { |
111 | if (base) { |
112 | dev_dbg(&s->dev, "odd IO request\n" ); |
113 | align = 0; |
114 | } else |
115 | while (align && (align < num)) |
116 | align <<= 1; |
117 | } |
118 | if (base & ~(align-1)) { |
119 | dev_dbg(&s->dev, "odd IO request\n" ); |
120 | align = 0; |
121 | } |
122 | |
123 | ret = s->resource_ops->find_io(s, res->flags, &base, num, align, |
124 | &res->parent); |
125 | if (ret) { |
126 | dev_dbg(&s->dev, "alloc_io_space request failed (%d)\n" , ret); |
127 | return -EINVAL; |
128 | } |
129 | |
130 | res->start = base; |
131 | res->end = res->start + num - 1; |
132 | |
133 | if (res->parent) { |
134 | ret = request_resource(root: res->parent, new: res); |
135 | if (ret) { |
136 | dev_warn(&s->dev, |
137 | "request_resource %pR failed: %d\n" , res, ret); |
138 | res->parent = NULL; |
139 | release_io_space(s, res); |
140 | } |
141 | } |
142 | dev_dbg(&s->dev, "alloc_io_space request result %d: %pR\n" , ret, res); |
143 | return ret; |
144 | } |
145 | |
146 | |
147 | /* |
148 | * pcmcia_access_config() - read or write card configuration registers |
149 | * |
150 | * pcmcia_access_config() reads and writes configuration registers in |
151 | * attribute memory. Memory window 0 is reserved for this and the tuple |
152 | * reading services. Drivers must use pcmcia_read_config_byte() or |
153 | * pcmcia_write_config_byte(). |
154 | */ |
155 | static int pcmcia_access_config(struct pcmcia_device *p_dev, |
156 | off_t where, u8 *val, |
157 | int (*accessf) (struct pcmcia_socket *s, |
158 | int attr, unsigned int addr, |
159 | unsigned int len, void *ptr)) |
160 | { |
161 | struct pcmcia_socket *s; |
162 | config_t *c; |
163 | int addr; |
164 | int ret = 0; |
165 | |
166 | s = p_dev->socket; |
167 | |
168 | mutex_lock(&s->ops_mutex); |
169 | c = p_dev->function_config; |
170 | |
171 | if (!(c->state & CONFIG_LOCKED)) { |
172 | dev_dbg(&p_dev->dev, "Configuration isn't locked\n" ); |
173 | mutex_unlock(lock: &s->ops_mutex); |
174 | return -EACCES; |
175 | } |
176 | |
177 | addr = (p_dev->config_base + where) >> 1; |
178 | |
179 | ret = accessf(s, 1, addr, 1, val); |
180 | |
181 | mutex_unlock(lock: &s->ops_mutex); |
182 | |
183 | return ret; |
184 | } |
185 | |
186 | |
187 | /* |
188 | * pcmcia_read_config_byte() - read a byte from a card configuration register |
189 | * |
190 | * pcmcia_read_config_byte() reads a byte from a configuration register in |
191 | * attribute memory. |
192 | */ |
193 | int pcmcia_read_config_byte(struct pcmcia_device *p_dev, off_t where, u8 *val) |
194 | { |
195 | return pcmcia_access_config(p_dev, where, val, accessf: pcmcia_read_cis_mem); |
196 | } |
197 | EXPORT_SYMBOL(pcmcia_read_config_byte); |
198 | |
199 | |
200 | /* |
201 | * pcmcia_write_config_byte() - write a byte to a card configuration register |
202 | * |
203 | * pcmcia_write_config_byte() writes a byte to a configuration register in |
204 | * attribute memory. |
205 | */ |
206 | int pcmcia_write_config_byte(struct pcmcia_device *p_dev, off_t where, u8 val) |
207 | { |
208 | return pcmcia_access_config(p_dev, where, val: &val, accessf: pcmcia_write_cis_mem); |
209 | } |
210 | EXPORT_SYMBOL(pcmcia_write_config_byte); |
211 | |
212 | |
213 | /** |
214 | * pcmcia_map_mem_page() - modify iomem window to point to a different offset |
215 | * @p_dev: pcmcia device |
216 | * @res: iomem resource already enabled by pcmcia_request_window() |
217 | * @offset: card_offset to map |
218 | * |
219 | * pcmcia_map_mem_page() modifies what can be read and written by accessing |
220 | * an iomem range previously enabled by pcmcia_request_window(), by setting |
221 | * the card_offset value to @offset. |
222 | */ |
223 | int pcmcia_map_mem_page(struct pcmcia_device *p_dev, struct resource *res, |
224 | unsigned int offset) |
225 | { |
226 | struct pcmcia_socket *s = p_dev->socket; |
227 | unsigned int w; |
228 | int ret; |
229 | |
230 | w = ((res->flags & IORESOURCE_BITS & WIN_FLAGS_REQ) >> 2) - 1; |
231 | if (w >= MAX_WIN) |
232 | return -EINVAL; |
233 | |
234 | mutex_lock(&s->ops_mutex); |
235 | s->win[w].card_start = offset; |
236 | ret = s->ops->set_mem_map(s, &s->win[w]); |
237 | if (ret) |
238 | dev_warn(&p_dev->dev, "failed to set_mem_map\n" ); |
239 | mutex_unlock(lock: &s->ops_mutex); |
240 | return ret; |
241 | } |
242 | EXPORT_SYMBOL(pcmcia_map_mem_page); |
243 | |
244 | |
245 | /** |
246 | * pcmcia_fixup_iowidth() - reduce io width to 8bit |
247 | * @p_dev: pcmcia device |
248 | * |
249 | * pcmcia_fixup_iowidth() allows a PCMCIA device driver to reduce the |
250 | * IO width to 8bit after having called pcmcia_enable_device() |
251 | * previously. |
252 | */ |
253 | int pcmcia_fixup_iowidth(struct pcmcia_device *p_dev) |
254 | { |
255 | struct pcmcia_socket *s = p_dev->socket; |
256 | pccard_io_map io_off = { 0, 0, 0, 0, 1 }; |
257 | pccard_io_map io_on; |
258 | int i, ret = 0; |
259 | |
260 | mutex_lock(&s->ops_mutex); |
261 | |
262 | dev_dbg(&p_dev->dev, "fixup iowidth to 8bit\n" ); |
263 | |
264 | if (!(s->state & SOCKET_PRESENT) || |
265 | !(p_dev->function_config->state & CONFIG_LOCKED)) { |
266 | dev_dbg(&p_dev->dev, "No card? Config not locked?\n" ); |
267 | ret = -EACCES; |
268 | goto unlock; |
269 | } |
270 | |
271 | io_on.speed = io_speed; |
272 | for (i = 0; i < MAX_IO_WIN; i++) { |
273 | if (!s->io[i].res) |
274 | continue; |
275 | io_off.map = i; |
276 | io_on.map = i; |
277 | |
278 | io_on.flags = MAP_ACTIVE | IO_DATA_PATH_WIDTH_8; |
279 | io_on.start = s->io[i].res->start; |
280 | io_on.stop = s->io[i].res->end; |
281 | |
282 | s->ops->set_io_map(s, &io_off); |
283 | msleep(msecs: 40); |
284 | s->ops->set_io_map(s, &io_on); |
285 | } |
286 | unlock: |
287 | mutex_unlock(lock: &s->ops_mutex); |
288 | |
289 | return ret; |
290 | } |
291 | EXPORT_SYMBOL(pcmcia_fixup_iowidth); |
292 | |
293 | |
294 | /** |
295 | * pcmcia_fixup_vpp() - set Vpp to a new voltage level |
296 | * @p_dev: pcmcia device |
297 | * @new_vpp: new Vpp voltage |
298 | * |
299 | * pcmcia_fixup_vpp() allows a PCMCIA device driver to set Vpp to |
300 | * a new voltage level between calls to pcmcia_enable_device() |
301 | * and pcmcia_disable_device(). |
302 | */ |
303 | int pcmcia_fixup_vpp(struct pcmcia_device *p_dev, unsigned char new_vpp) |
304 | { |
305 | struct pcmcia_socket *s = p_dev->socket; |
306 | int ret = 0; |
307 | |
308 | mutex_lock(&s->ops_mutex); |
309 | |
310 | dev_dbg(&p_dev->dev, "fixup Vpp to %d\n" , new_vpp); |
311 | |
312 | if (!(s->state & SOCKET_PRESENT) || |
313 | !(p_dev->function_config->state & CONFIG_LOCKED)) { |
314 | dev_dbg(&p_dev->dev, "No card? Config not locked?\n" ); |
315 | ret = -EACCES; |
316 | goto unlock; |
317 | } |
318 | |
319 | s->socket.Vpp = new_vpp; |
320 | if (s->ops->set_socket(s, &s->socket)) { |
321 | dev_warn(&p_dev->dev, "Unable to set VPP\n" ); |
322 | ret = -EIO; |
323 | goto unlock; |
324 | } |
325 | p_dev->vpp = new_vpp; |
326 | |
327 | unlock: |
328 | mutex_unlock(lock: &s->ops_mutex); |
329 | |
330 | return ret; |
331 | } |
332 | EXPORT_SYMBOL(pcmcia_fixup_vpp); |
333 | |
334 | |
335 | /** |
336 | * pcmcia_release_configuration() - physically disable a PCMCIA device |
337 | * @p_dev: pcmcia device |
338 | * |
339 | * pcmcia_release_configuration() is the 1:1 counterpart to |
340 | * pcmcia_enable_device(): If a PCMCIA device is no longer used by any |
341 | * driver, the Vpp voltage is set to 0, IRQs will no longer be generated, |
342 | * and I/O ranges will be disabled. As pcmcia_release_io() and |
343 | * pcmcia_release_window() still need to be called, device drivers are |
344 | * expected to call pcmcia_disable_device() instead. |
345 | */ |
346 | int pcmcia_release_configuration(struct pcmcia_device *p_dev) |
347 | { |
348 | pccard_io_map io = { 0, 0, 0, 0, 1 }; |
349 | struct pcmcia_socket *s = p_dev->socket; |
350 | config_t *c; |
351 | int i; |
352 | |
353 | mutex_lock(&s->ops_mutex); |
354 | c = p_dev->function_config; |
355 | if (p_dev->_locked) { |
356 | p_dev->_locked = 0; |
357 | if (--(s->lock_count) == 0) { |
358 | s->socket.flags = SS_OUTPUT_ENA; /* Is this correct? */ |
359 | s->socket.Vpp = 0; |
360 | s->socket.io_irq = 0; |
361 | s->ops->set_socket(s, &s->socket); |
362 | } |
363 | } |
364 | if (c->state & CONFIG_LOCKED) { |
365 | c->state &= ~CONFIG_LOCKED; |
366 | if (c->state & CONFIG_IO_REQ) |
367 | for (i = 0; i < MAX_IO_WIN; i++) { |
368 | if (!s->io[i].res) |
369 | continue; |
370 | s->io[i].Config--; |
371 | if (s->io[i].Config != 0) |
372 | continue; |
373 | io.map = i; |
374 | s->ops->set_io_map(s, &io); |
375 | } |
376 | } |
377 | mutex_unlock(lock: &s->ops_mutex); |
378 | |
379 | return 0; |
380 | } |
381 | |
382 | |
383 | /** |
384 | * pcmcia_release_io() - release I/O allocated by a PCMCIA device |
385 | * @p_dev: pcmcia device |
386 | * |
387 | * pcmcia_release_io() releases the I/O ranges allocated by a PCMCIA |
388 | * device. This may be invoked some time after a card ejection has |
389 | * already dumped the actual socket configuration, so if the client is |
390 | * "stale", we don't bother checking the port ranges against the |
391 | * current socket values. |
392 | */ |
393 | static void pcmcia_release_io(struct pcmcia_device *p_dev) |
394 | { |
395 | struct pcmcia_socket *s = p_dev->socket; |
396 | config_t *c; |
397 | |
398 | mutex_lock(&s->ops_mutex); |
399 | if (!p_dev->_io) |
400 | goto out; |
401 | |
402 | c = p_dev->function_config; |
403 | |
404 | release_io_space(s, res: &c->io[0]); |
405 | |
406 | if (c->io[1].end) |
407 | release_io_space(s, res: &c->io[1]); |
408 | |
409 | p_dev->_io = 0; |
410 | c->state &= ~CONFIG_IO_REQ; |
411 | |
412 | out: |
413 | mutex_unlock(lock: &s->ops_mutex); |
414 | } /* pcmcia_release_io */ |
415 | |
416 | |
417 | /** |
418 | * pcmcia_release_window() - release reserved iomem for PCMCIA devices |
419 | * @p_dev: pcmcia device |
420 | * @res: iomem resource to release |
421 | * |
422 | * pcmcia_release_window() releases &struct resource *res which was |
423 | * previously reserved by calling pcmcia_request_window(). |
424 | */ |
425 | int pcmcia_release_window(struct pcmcia_device *p_dev, struct resource *res) |
426 | { |
427 | struct pcmcia_socket *s = p_dev->socket; |
428 | pccard_mem_map *win; |
429 | unsigned int w; |
430 | |
431 | dev_dbg(&p_dev->dev, "releasing window %pR\n" , res); |
432 | |
433 | w = ((res->flags & IORESOURCE_BITS & WIN_FLAGS_REQ) >> 2) - 1; |
434 | if (w >= MAX_WIN) |
435 | return -EINVAL; |
436 | |
437 | mutex_lock(&s->ops_mutex); |
438 | win = &s->win[w]; |
439 | |
440 | if (!(p_dev->_win & CLIENT_WIN_REQ(w))) { |
441 | dev_dbg(&p_dev->dev, "not releasing unknown window\n" ); |
442 | mutex_unlock(lock: &s->ops_mutex); |
443 | return -EINVAL; |
444 | } |
445 | |
446 | /* Shut down memory window */ |
447 | win->flags &= ~MAP_ACTIVE; |
448 | s->ops->set_mem_map(s, win); |
449 | s->state &= ~SOCKET_WIN_REQ(w); |
450 | |
451 | /* Release system memory */ |
452 | if (win->res) { |
453 | release_resource(new: res); |
454 | release_resource(new: win->res); |
455 | kfree(objp: win->res); |
456 | win->res = NULL; |
457 | } |
458 | res->start = res->end = 0; |
459 | res->flags = IORESOURCE_MEM; |
460 | p_dev->_win &= ~CLIENT_WIN_REQ(w); |
461 | mutex_unlock(lock: &s->ops_mutex); |
462 | |
463 | return 0; |
464 | } /* pcmcia_release_window */ |
465 | EXPORT_SYMBOL(pcmcia_release_window); |
466 | |
467 | |
468 | /** |
469 | * pcmcia_enable_device() - set up and activate a PCMCIA device |
470 | * @p_dev: the associated PCMCIA device |
471 | * |
472 | * pcmcia_enable_device() physically enables a PCMCIA device. It parses |
473 | * the flags passed to in @flags and stored in @p_dev->flags and sets up |
474 | * the Vpp voltage, enables the speaker line, I/O ports and store proper |
475 | * values to configuration registers. |
476 | */ |
477 | int pcmcia_enable_device(struct pcmcia_device *p_dev) |
478 | { |
479 | int i; |
480 | unsigned int base; |
481 | struct pcmcia_socket *s = p_dev->socket; |
482 | config_t *c; |
483 | pccard_io_map iomap; |
484 | unsigned char status = 0; |
485 | unsigned char ext_status = 0; |
486 | unsigned char option = 0; |
487 | unsigned int flags = p_dev->config_flags; |
488 | |
489 | if (!(s->state & SOCKET_PRESENT)) |
490 | return -ENODEV; |
491 | |
492 | mutex_lock(&s->ops_mutex); |
493 | c = p_dev->function_config; |
494 | if (c->state & CONFIG_LOCKED) { |
495 | mutex_unlock(lock: &s->ops_mutex); |
496 | dev_dbg(&p_dev->dev, "Configuration is locked\n" ); |
497 | return -EACCES; |
498 | } |
499 | |
500 | /* Do power control. We don't allow changes in Vcc. */ |
501 | s->socket.Vpp = p_dev->vpp; |
502 | if (s->ops->set_socket(s, &s->socket)) { |
503 | mutex_unlock(lock: &s->ops_mutex); |
504 | dev_warn(&p_dev->dev, "Unable to set socket state\n" ); |
505 | return -EINVAL; |
506 | } |
507 | |
508 | /* Pick memory or I/O card, DMA mode, interrupt */ |
509 | if (p_dev->_io || flags & CONF_ENABLE_IRQ) |
510 | flags |= CONF_ENABLE_IOCARD; |
511 | if (flags & CONF_ENABLE_IOCARD) |
512 | s->socket.flags |= SS_IOCARD; |
513 | if (flags & CONF_ENABLE_ZVCARD) |
514 | s->socket.flags |= SS_ZVCARD | SS_IOCARD; |
515 | if (flags & CONF_ENABLE_SPKR) { |
516 | s->socket.flags |= SS_SPKR_ENA; |
517 | status = CCSR_AUDIO_ENA; |
518 | if (!(p_dev->config_regs & PRESENT_STATUS)) |
519 | dev_warn(&p_dev->dev, "speaker requested, but " |
520 | "PRESENT_STATUS not set!\n" ); |
521 | } |
522 | if (flags & CONF_ENABLE_IRQ) |
523 | s->socket.io_irq = s->pcmcia_irq; |
524 | else |
525 | s->socket.io_irq = 0; |
526 | if (flags & CONF_ENABLE_ESR) { |
527 | p_dev->config_regs |= PRESENT_EXT_STATUS; |
528 | ext_status = ESR_REQ_ATTN_ENA; |
529 | } |
530 | s->ops->set_socket(s, &s->socket); |
531 | s->lock_count++; |
532 | |
533 | dev_dbg(&p_dev->dev, |
534 | "enable_device: V %d, flags %x, base %x, regs %x, idx %x\n" , |
535 | p_dev->vpp, flags, p_dev->config_base, p_dev->config_regs, |
536 | p_dev->config_index); |
537 | |
538 | /* Set up CIS configuration registers */ |
539 | base = p_dev->config_base; |
540 | if (p_dev->config_regs & PRESENT_COPY) { |
541 | u16 tmp = 0; |
542 | dev_dbg(&p_dev->dev, "clearing CISREG_SCR\n" ); |
543 | pcmcia_write_cis_mem(s, attr: 1, addr: (base + CISREG_SCR)>>1, len: 1, ptr: &tmp); |
544 | } |
545 | if (p_dev->config_regs & PRESENT_PIN_REPLACE) { |
546 | u16 tmp = 0; |
547 | dev_dbg(&p_dev->dev, "clearing CISREG_PRR\n" ); |
548 | pcmcia_write_cis_mem(s, attr: 1, addr: (base + CISREG_PRR)>>1, len: 1, ptr: &tmp); |
549 | } |
550 | if (p_dev->config_regs & PRESENT_OPTION) { |
551 | if (s->functions == 1) { |
552 | option = p_dev->config_index & COR_CONFIG_MASK; |
553 | } else { |
554 | option = p_dev->config_index & COR_MFC_CONFIG_MASK; |
555 | option |= COR_FUNC_ENA|COR_IREQ_ENA; |
556 | if (p_dev->config_regs & PRESENT_IOBASE_0) |
557 | option |= COR_ADDR_DECODE; |
558 | } |
559 | if ((flags & CONF_ENABLE_IRQ) && |
560 | !(flags & CONF_ENABLE_PULSE_IRQ)) |
561 | option |= COR_LEVEL_REQ; |
562 | pcmcia_write_cis_mem(s, attr: 1, addr: (base + CISREG_COR)>>1, len: 1, ptr: &option); |
563 | msleep(msecs: 40); |
564 | } |
565 | if (p_dev->config_regs & PRESENT_STATUS) |
566 | pcmcia_write_cis_mem(s, attr: 1, addr: (base + CISREG_CCSR)>>1, len: 1, ptr: &status); |
567 | |
568 | if (p_dev->config_regs & PRESENT_EXT_STATUS) |
569 | pcmcia_write_cis_mem(s, attr: 1, addr: (base + CISREG_ESR)>>1, len: 1, |
570 | ptr: &ext_status); |
571 | |
572 | if (p_dev->config_regs & PRESENT_IOBASE_0) { |
573 | u8 b = c->io[0].start & 0xff; |
574 | pcmcia_write_cis_mem(s, attr: 1, addr: (base + CISREG_IOBASE_0)>>1, len: 1, ptr: &b); |
575 | b = (c->io[0].start >> 8) & 0xff; |
576 | pcmcia_write_cis_mem(s, attr: 1, addr: (base + CISREG_IOBASE_1)>>1, len: 1, ptr: &b); |
577 | } |
578 | if (p_dev->config_regs & PRESENT_IOSIZE) { |
579 | u8 b = resource_size(res: &c->io[0]) + resource_size(res: &c->io[1]) - 1; |
580 | pcmcia_write_cis_mem(s, attr: 1, addr: (base + CISREG_IOSIZE)>>1, len: 1, ptr: &b); |
581 | } |
582 | |
583 | /* Configure I/O windows */ |
584 | if (c->state & CONFIG_IO_REQ) { |
585 | iomap.speed = io_speed; |
586 | for (i = 0; i < MAX_IO_WIN; i++) |
587 | if (s->io[i].res) { |
588 | iomap.map = i; |
589 | iomap.flags = MAP_ACTIVE; |
590 | switch (s->io[i].res->flags & IO_DATA_PATH_WIDTH) { |
591 | case IO_DATA_PATH_WIDTH_16: |
592 | iomap.flags |= MAP_16BIT; break; |
593 | case IO_DATA_PATH_WIDTH_AUTO: |
594 | iomap.flags |= MAP_AUTOSZ; break; |
595 | default: |
596 | break; |
597 | } |
598 | iomap.start = s->io[i].res->start; |
599 | iomap.stop = s->io[i].res->end; |
600 | s->ops->set_io_map(s, &iomap); |
601 | s->io[i].Config++; |
602 | } |
603 | } |
604 | |
605 | c->state |= CONFIG_LOCKED; |
606 | p_dev->_locked = 1; |
607 | mutex_unlock(lock: &s->ops_mutex); |
608 | return 0; |
609 | } /* pcmcia_enable_device */ |
610 | EXPORT_SYMBOL(pcmcia_enable_device); |
611 | |
612 | |
613 | /** |
614 | * pcmcia_request_io() - attempt to reserve port ranges for PCMCIA devices |
615 | * @p_dev: the associated PCMCIA device |
616 | * |
617 | * pcmcia_request_io() attempts to reserve the IO port ranges specified in |
618 | * &struct pcmcia_device @p_dev->resource[0] and @p_dev->resource[1]. The |
619 | * "start" value is the requested start of the IO port resource; "end" |
620 | * reflects the number of ports requested. The number of IO lines requested |
621 | * is specified in &struct pcmcia_device @p_dev->io_lines. |
622 | */ |
623 | int pcmcia_request_io(struct pcmcia_device *p_dev) |
624 | { |
625 | struct pcmcia_socket *s = p_dev->socket; |
626 | config_t *c = p_dev->function_config; |
627 | int ret = -EINVAL; |
628 | |
629 | mutex_lock(&s->ops_mutex); |
630 | dev_dbg(&p_dev->dev, "pcmcia_request_io: %pR , %pR" , |
631 | &c->io[0], &c->io[1]); |
632 | |
633 | if (!(s->state & SOCKET_PRESENT)) { |
634 | dev_dbg(&p_dev->dev, "pcmcia_request_io: No card present\n" ); |
635 | goto out; |
636 | } |
637 | |
638 | if (c->state & CONFIG_LOCKED) { |
639 | dev_dbg(&p_dev->dev, "Configuration is locked\n" ); |
640 | goto out; |
641 | } |
642 | if (c->state & CONFIG_IO_REQ) { |
643 | dev_dbg(&p_dev->dev, "IO already configured\n" ); |
644 | goto out; |
645 | } |
646 | |
647 | ret = alloc_io_space(s, res: &c->io[0], lines: p_dev->io_lines); |
648 | if (ret) |
649 | goto out; |
650 | |
651 | if (c->io[1].end) { |
652 | ret = alloc_io_space(s, res: &c->io[1], lines: p_dev->io_lines); |
653 | if (ret) { |
654 | struct resource tmp = c->io[0]; |
655 | /* release the previously allocated resource */ |
656 | release_io_space(s, res: &c->io[0]); |
657 | /* but preserve the settings, for they worked... */ |
658 | c->io[0].end = resource_size(res: &tmp); |
659 | c->io[0].start = tmp.start; |
660 | c->io[0].flags = tmp.flags; |
661 | goto out; |
662 | } |
663 | } else |
664 | c->io[1].start = 0; |
665 | |
666 | c->state |= CONFIG_IO_REQ; |
667 | p_dev->_io = 1; |
668 | |
669 | dev_dbg(&p_dev->dev, "pcmcia_request_io succeeded: %pR , %pR" , |
670 | &c->io[0], &c->io[1]); |
671 | out: |
672 | mutex_unlock(lock: &s->ops_mutex); |
673 | |
674 | return ret; |
675 | } /* pcmcia_request_io */ |
676 | EXPORT_SYMBOL(pcmcia_request_io); |
677 | |
678 | |
679 | /** |
680 | * pcmcia_request_irq() - attempt to request a IRQ for a PCMCIA device |
681 | * @p_dev: the associated PCMCIA device |
682 | * @handler: IRQ handler to register |
683 | * |
684 | * pcmcia_request_irq() is a wrapper around request_irq() which allows |
685 | * the PCMCIA core to clean up the registration in pcmcia_disable_device(). |
686 | * Drivers are free to use request_irq() directly, but then they need to |
687 | * call free_irq() themselves, too. Also, only %IRQF_SHARED capable IRQ |
688 | * handlers are allowed. |
689 | */ |
690 | int __must_check pcmcia_request_irq(struct pcmcia_device *p_dev, |
691 | irq_handler_t handler) |
692 | { |
693 | int ret; |
694 | |
695 | if (!p_dev->irq) |
696 | return -EINVAL; |
697 | |
698 | ret = request_irq(irq: p_dev->irq, handler, IRQF_SHARED, |
699 | name: p_dev->devname, dev: p_dev->priv); |
700 | if (!ret) |
701 | p_dev->_irq = 1; |
702 | |
703 | return ret; |
704 | } |
705 | EXPORT_SYMBOL(pcmcia_request_irq); |
706 | |
707 | |
708 | #ifdef CONFIG_PCMCIA_PROBE |
709 | |
710 | /* mask of IRQs already reserved by other cards, we should avoid using them */ |
711 | static u8 pcmcia_used_irq[32]; |
712 | |
713 | static irqreturn_t test_action(int cpl, void *dev_id) |
714 | { |
715 | return IRQ_NONE; |
716 | } |
717 | |
718 | /** |
719 | * pcmcia_setup_isa_irq() - determine whether an ISA IRQ can be used |
720 | * @p_dev: the associated PCMCIA device |
721 | * @type: IRQ type (flags) |
722 | * |
723 | * locking note: must be called with ops_mutex locked. |
724 | */ |
725 | static int pcmcia_setup_isa_irq(struct pcmcia_device *p_dev, int type) |
726 | { |
727 | struct pcmcia_socket *s = p_dev->socket; |
728 | unsigned int try, irq; |
729 | u32 mask = s->irq_mask; |
730 | int ret = -ENODEV; |
731 | |
732 | for (try = 0; try < 64; try++) { |
733 | irq = try % 32; |
734 | |
735 | if (irq > NR_IRQS) |
736 | continue; |
737 | |
738 | /* marked as available by driver, not blocked by userspace? */ |
739 | if (!((mask >> irq) & 1)) |
740 | continue; |
741 | |
742 | /* avoid an IRQ which is already used by another PCMCIA card */ |
743 | if ((try < 32) && pcmcia_used_irq[irq]) |
744 | continue; |
745 | |
746 | /* register the correct driver, if possible, to check whether |
747 | * registering a dummy handle works, i.e. if the IRQ isn't |
748 | * marked as used by the kernel resource management core */ |
749 | ret = request_irq(irq, test_action, type, p_dev->devname, |
750 | p_dev); |
751 | if (!ret) { |
752 | free_irq(irq, p_dev); |
753 | p_dev->irq = s->pcmcia_irq = irq; |
754 | pcmcia_used_irq[irq]++; |
755 | break; |
756 | } |
757 | } |
758 | |
759 | return ret; |
760 | } |
761 | |
762 | void pcmcia_cleanup_irq(struct pcmcia_socket *s) |
763 | { |
764 | pcmcia_used_irq[s->pcmcia_irq]--; |
765 | s->pcmcia_irq = 0; |
766 | } |
767 | |
768 | #else /* CONFIG_PCMCIA_PROBE */ |
769 | |
770 | static int pcmcia_setup_isa_irq(struct pcmcia_device *p_dev, int type) |
771 | { |
772 | return -EINVAL; |
773 | } |
774 | |
775 | void pcmcia_cleanup_irq(struct pcmcia_socket *s) |
776 | { |
777 | s->pcmcia_irq = 0; |
778 | return; |
779 | } |
780 | |
781 | #endif /* CONFIG_PCMCIA_PROBE */ |
782 | |
783 | |
784 | /** |
785 | * pcmcia_setup_irq() - determine IRQ to be used for device |
786 | * @p_dev: the associated PCMCIA device |
787 | * |
788 | * locking note: must be called with ops_mutex locked. |
789 | */ |
790 | int pcmcia_setup_irq(struct pcmcia_device *p_dev) |
791 | { |
792 | struct pcmcia_socket *s = p_dev->socket; |
793 | |
794 | if (p_dev->irq) |
795 | return 0; |
796 | |
797 | /* already assigned? */ |
798 | if (s->pcmcia_irq) { |
799 | p_dev->irq = s->pcmcia_irq; |
800 | return 0; |
801 | } |
802 | |
803 | /* prefer an exclusive ISA irq */ |
804 | if (!pcmcia_setup_isa_irq(p_dev, type: 0)) |
805 | return 0; |
806 | |
807 | /* but accept a shared ISA irq */ |
808 | if (!pcmcia_setup_isa_irq(p_dev, IRQF_SHARED)) |
809 | return 0; |
810 | |
811 | /* but use the PCI irq otherwise */ |
812 | if (s->pci_irq) { |
813 | p_dev->irq = s->pcmcia_irq = s->pci_irq; |
814 | return 0; |
815 | } |
816 | |
817 | return -EINVAL; |
818 | } |
819 | |
820 | |
821 | /** |
822 | * pcmcia_request_window() - attempt to reserve iomem for PCMCIA devices |
823 | * @p_dev: the associated PCMCIA device |
824 | * @res: &struct resource pointing to p_dev->resource[2..5] |
825 | * @speed: access speed |
826 | * |
827 | * pcmcia_request_window() attepts to reserve an iomem ranges specified in |
828 | * &struct resource @res pointing to one of the entries in |
829 | * &struct pcmcia_device @p_dev->resource[2..5]. The "start" value is the |
830 | * requested start of the IO mem resource; "end" reflects the size |
831 | * requested. |
832 | */ |
833 | int pcmcia_request_window(struct pcmcia_device *p_dev, struct resource *res, |
834 | unsigned int speed) |
835 | { |
836 | struct pcmcia_socket *s = p_dev->socket; |
837 | pccard_mem_map *win; |
838 | u_long align; |
839 | int w; |
840 | |
841 | dev_dbg(&p_dev->dev, "request_window %pR %d\n" , res, speed); |
842 | |
843 | if (!(s->state & SOCKET_PRESENT)) { |
844 | dev_dbg(&p_dev->dev, "No card present\n" ); |
845 | return -ENODEV; |
846 | } |
847 | |
848 | /* Window size defaults to smallest available */ |
849 | if (res->end == 0) |
850 | res->end = s->map_size; |
851 | align = (s->features & SS_CAP_MEM_ALIGN) ? res->end : s->map_size; |
852 | if (res->end & (s->map_size-1)) { |
853 | dev_dbg(&p_dev->dev, "invalid map size\n" ); |
854 | return -EINVAL; |
855 | } |
856 | if ((res->start && (s->features & SS_CAP_STATIC_MAP)) || |
857 | (res->start & (align-1))) { |
858 | dev_dbg(&p_dev->dev, "invalid base address\n" ); |
859 | return -EINVAL; |
860 | } |
861 | if (res->start) |
862 | align = 0; |
863 | |
864 | /* Allocate system memory window */ |
865 | mutex_lock(&s->ops_mutex); |
866 | for (w = 0; w < MAX_WIN; w++) |
867 | if (!(s->state & SOCKET_WIN_REQ(w))) |
868 | break; |
869 | if (w == MAX_WIN) { |
870 | dev_dbg(&p_dev->dev, "all windows are used already\n" ); |
871 | mutex_unlock(lock: &s->ops_mutex); |
872 | return -EINVAL; |
873 | } |
874 | |
875 | win = &s->win[w]; |
876 | |
877 | if (!(s->features & SS_CAP_STATIC_MAP)) { |
878 | win->res = pcmcia_find_mem_region(base: res->start, num: res->end, align, |
879 | low: 0, s); |
880 | if (!win->res) { |
881 | dev_dbg(&p_dev->dev, "allocating mem region failed\n" ); |
882 | mutex_unlock(lock: &s->ops_mutex); |
883 | return -EINVAL; |
884 | } |
885 | } |
886 | p_dev->_win |= CLIENT_WIN_REQ(w); |
887 | |
888 | /* Configure the socket controller */ |
889 | win->map = w+1; |
890 | win->flags = res->flags & WIN_FLAGS_MAP; |
891 | win->speed = speed; |
892 | win->card_start = 0; |
893 | |
894 | if (s->ops->set_mem_map(s, win) != 0) { |
895 | dev_dbg(&p_dev->dev, "failed to set memory mapping\n" ); |
896 | mutex_unlock(lock: &s->ops_mutex); |
897 | return -EIO; |
898 | } |
899 | s->state |= SOCKET_WIN_REQ(w); |
900 | |
901 | /* Return window handle */ |
902 | if (s->features & SS_CAP_STATIC_MAP) |
903 | res->start = win->static_start; |
904 | else |
905 | res->start = win->res->start; |
906 | |
907 | /* convert to new-style resources */ |
908 | res->end += res->start - 1; |
909 | res->flags &= ~WIN_FLAGS_REQ; |
910 | res->flags |= (win->map << 2) | IORESOURCE_MEM; |
911 | res->parent = win->res; |
912 | if (win->res) |
913 | request_resource(root: &iomem_resource, new: res); |
914 | |
915 | dev_dbg(&p_dev->dev, "request_window results in %pR\n" , res); |
916 | |
917 | mutex_unlock(lock: &s->ops_mutex); |
918 | |
919 | return 0; |
920 | } /* pcmcia_request_window */ |
921 | EXPORT_SYMBOL(pcmcia_request_window); |
922 | |
923 | |
924 | /** |
925 | * pcmcia_disable_device() - disable and clean up a PCMCIA device |
926 | * @p_dev: the associated PCMCIA device |
927 | * |
928 | * pcmcia_disable_device() is the driver-callable counterpart to |
929 | * pcmcia_enable_device(): If a PCMCIA device is no longer used, |
930 | * drivers are expected to clean up and disable the device by calling |
931 | * this function. Any I/O ranges (iomem and ioports) will be released, |
932 | * the Vpp voltage will be set to 0, and IRQs will no longer be |
933 | * generated -- at least if there is no other card function (of |
934 | * multifunction devices) being used. |
935 | */ |
936 | void pcmcia_disable_device(struct pcmcia_device *p_dev) |
937 | { |
938 | int i; |
939 | |
940 | dev_dbg(&p_dev->dev, "disabling device\n" ); |
941 | |
942 | for (i = 0; i < MAX_WIN; i++) { |
943 | struct resource *res = p_dev->resource[MAX_IO_WIN + i]; |
944 | if (res->flags & WIN_FLAGS_REQ) |
945 | pcmcia_release_window(p_dev, res); |
946 | } |
947 | |
948 | pcmcia_release_configuration(p_dev); |
949 | pcmcia_release_io(p_dev); |
950 | if (p_dev->_irq) { |
951 | free_irq(p_dev->irq, p_dev->priv); |
952 | p_dev->_irq = 0; |
953 | } |
954 | } |
955 | EXPORT_SYMBOL(pcmcia_disable_device); |
956 | |