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pcmcia: replace struct irq with uint pcmcia_irq in struct pcmcia_socket
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / pcmcia / pcmcia_resource.c
blobcefc4cda9d3e148411894f450b33c34d7a17ecb0
1 /*
2 * PCMCIA 16-bit resource management functions
3 *
4 * The initial developer of the original code is David A. Hinds
5 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
6 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
7 *
8 * Copyright (C) 1999 David A. Hinds
9 * Copyright (C) 2004-2005 Dominik Brodowski
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 *
15 */
16
17 #include <linux/module.h>
18 #include <linux/kernel.h>
19 #include <linux/interrupt.h>
20 #include <linux/delay.h>
21 #include <linux/pci.h>
22 #include <linux/device.h>
23 #include <linux/netdevice.h>
24 #include <linux/slab.h>
25
26 #include <asm/irq.h>
27
28 #include <pcmcia/cs_types.h>
29 #include <pcmcia/ss.h>
30 #include <pcmcia/cs.h>
31 #include <pcmcia/cistpl.h>
32 #include <pcmcia/cisreg.h>
33 #include <pcmcia/ds.h>
34
35 #include "cs_internal.h"
36
37
38 /* Access speed for IO windows */
39 static int io_speed;
40 module_param(io_speed, int, 0444);
41
42
43 static int pcmcia_adjust_io_region(struct resource *res, unsigned long start,
44 unsigned long end, struct pcmcia_socket *s)
45 {
46 if (s->resource_ops->adjust_io_region)
47 return s->resource_ops->adjust_io_region(res, start, end, s);
48 return -ENOMEM;
49 }
50
51 static struct resource *pcmcia_find_io_region(unsigned long base, int num,
52 unsigned long align,
53 struct pcmcia_socket *s)
54 {
55 if (s->resource_ops->find_io)
56 return s->resource_ops->find_io(base, num, align, s);
57 return NULL;
58 }
59
60 int pcmcia_validate_mem(struct pcmcia_socket *s)
61 {
62 if (s->resource_ops->validate_mem)
63 return s->resource_ops->validate_mem(s);
64 /* if there is no callback, we can assume that everything is OK */
65 return 0;
66 }
67
68 struct resource *pcmcia_find_mem_region(u_long base, u_long num, u_long align,
69 int low, struct pcmcia_socket *s)
70 {
71 if (s->resource_ops->find_mem)
72 return s->resource_ops->find_mem(base, num, align, low, s);
73 return NULL;
74 }
75
76
77 /** alloc_io_space
78 *
79 * Special stuff for managing IO windows, because they are scarce
80 */
81
82 static int alloc_io_space(struct pcmcia_socket *s, u_int attr,
83 unsigned int *base, unsigned int num, u_int lines)
84 {
85 int i;
86 unsigned int try, align;
87
88 align = (*base) ? (lines ? 1<<lines : 0) : 1;
89 if (align && (align < num)) {
90 if (*base) {
91 dev_dbg(&s->dev, "odd IO request: num %#x align %#x\n",
92 num, align);
93 align = 0;
94 } else
95 while (align && (align < num))
96 align <<= 1;
97 }
98 if (*base & ~(align-1)) {
99 dev_dbg(&s->dev, "odd IO request: base %#x align %#x\n",
100 *base, align);
101 align = 0;
102 }
103 if ((s->features & SS_CAP_STATIC_MAP) && s->io_offset) {
104 *base = s->io_offset | (*base & 0x0fff);
105 return 0;
106 }
107 /* Check for an already-allocated window that must conflict with
108 * what was asked for. It is a hack because it does not catch all
109 * potential conflicts, just the most obvious ones.
110 */
111 for (i = 0; i < MAX_IO_WIN; i++)
112 if ((s->io[i].res) && *base &&
113 ((s->io[i].res->start & (align-1)) == *base))
114 return 1;
115 for (i = 0; i < MAX_IO_WIN; i++) {
116 if (!s->io[i].res) {
117 s->io[i].res = pcmcia_find_io_region(*base, num, align, s);
118 if (s->io[i].res) {
119 *base = s->io[i].res->start;
120 s->io[i].res->flags = (s->io[i].res->flags & ~IORESOURCE_BITS) | (attr & IORESOURCE_BITS);
121 s->io[i].InUse = num;
122 break;
123 } else
124 return 1;
125 } else if ((s->io[i].res->flags & IORESOURCE_BITS) != (attr & IORESOURCE_BITS))
126 continue;
127 /* Try to extend top of window */
128 try = s->io[i].res->end + 1;
129 if ((*base == 0) || (*base == try))
130 if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start,
131 s->io[i].res->end + num, s) == 0) {
132 *base = try;
133 s->io[i].InUse += num;
134 break;
135 }
136 /* Try to extend bottom of window */
137 try = s->io[i].res->start - num;
138 if ((*base == 0) || (*base == try))
139 if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start - num,
140 s->io[i].res->end, s) == 0) {
141 *base = try;
142 s->io[i].InUse += num;
143 break;
144 }
145 }
146 return (i == MAX_IO_WIN);
147 } /* alloc_io_space */
148
149
150 static void release_io_space(struct pcmcia_socket *s, unsigned int base,
151 unsigned int num)
152 {
153 int i;
154
155 for (i = 0; i < MAX_IO_WIN; i++) {
156 if (!s->io[i].res)
157 continue;
158 if ((s->io[i].res->start <= base) &&
159 (s->io[i].res->end >= base+num-1)) {
160 s->io[i].InUse -= num;
161 /* Free the window if no one else is using it */
162 if (s->io[i].InUse == 0) {
163 release_resource(s->io[i].res);
164 kfree(s->io[i].res);
165 s->io[i].res = NULL;
166 }
167 }
168 }
169 } /* release_io_space */
170
171
172 /** pccard_access_configuration_register
173 *
174 * Access_configuration_register() reads and writes configuration
175 * registers in attribute memory. Memory window 0 is reserved for
176 * this and the tuple reading services.
177 */
178
179 int pcmcia_access_configuration_register(struct pcmcia_device *p_dev,
180 conf_reg_t *reg)
181 {
182 struct pcmcia_socket *s;
183 config_t *c;
184 int addr;
185 u_char val;
186
187 if (!p_dev || !p_dev->function_config)
188 return -EINVAL;
189
190 s = p_dev->socket;
191
192 mutex_lock(&s->ops_mutex);
193 c = p_dev->function_config;
194
195 if (!(c->state & CONFIG_LOCKED)) {
196 dev_dbg(&s->dev, "Configuration isnt't locked\n");
197 mutex_unlock(&s->ops_mutex);
198 return -EACCES;
199 }
200
201 addr = (c->ConfigBase + reg->Offset) >> 1;
202 mutex_unlock(&s->ops_mutex);
203
204 switch (reg->Action) {
205 case CS_READ:
206 pcmcia_read_cis_mem(s, 1, addr, 1, &val);
207 reg->Value = val;
208 break;
209 case CS_WRITE:
210 val = reg->Value;
211 pcmcia_write_cis_mem(s, 1, addr, 1, &val);
212 break;
213 default:
214 dev_dbg(&s->dev, "Invalid conf register request\n");
215 return -EINVAL;
216 break;
217 }
218 return 0;
219 } /* pcmcia_access_configuration_register */
220 EXPORT_SYMBOL(pcmcia_access_configuration_register);
221
222
223 int pcmcia_map_mem_page(struct pcmcia_device *p_dev, window_handle_t wh,
224 memreq_t *req)
225 {
226 struct pcmcia_socket *s = p_dev->socket;
227 int ret;
228
229 wh--;
230 if (wh >= MAX_WIN)
231 return -EINVAL;
232 if (req->Page != 0) {
233 dev_dbg(&s->dev, "failure: requested page is zero\n");
234 return -EINVAL;
235 }
236 mutex_lock(&s->ops_mutex);
237 s->win[wh].card_start = req->CardOffset;
238 ret = s->ops->set_mem_map(s, &s->win[wh]);
239 if (ret)
240 dev_warn(&s->dev, "failed to set_mem_map\n");
241 mutex_unlock(&s->ops_mutex);
242 return ret;
243 } /* pcmcia_map_mem_page */
244 EXPORT_SYMBOL(pcmcia_map_mem_page);
245
246
247 /** pcmcia_modify_configuration
248 *
249 * Modify a locked socket configuration
250 */
251 int pcmcia_modify_configuration(struct pcmcia_device *p_dev,
252 modconf_t *mod)
253 {
254 struct pcmcia_socket *s;
255 config_t *c;
256 int ret;
257
258 s = p_dev->socket;
259
260 mutex_lock(&s->ops_mutex);
261 c = p_dev->function_config;
262
263 if (!(s->state & SOCKET_PRESENT)) {
264 dev_dbg(&s->dev, "No card present\n");
265 ret = -ENODEV;
266 goto unlock;
267 }
268 if (!(c->state & CONFIG_LOCKED)) {
269 dev_dbg(&s->dev, "Configuration isnt't locked\n");
270 ret = -EACCES;
271 goto unlock;
272 }
273
274 if (mod->Attributes & (CONF_IRQ_CHANGE_VALID | CONF_VCC_CHANGE_VALID)) {
275 dev_dbg(&s->dev,
276 "changing Vcc or IRQ is not allowed at this time\n");
277 ret = -EINVAL;
278 goto unlock;
279 }
280
281 /* We only allow changing Vpp1 and Vpp2 to the same value */
282 if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) &&
283 (mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
284 if (mod->Vpp1 != mod->Vpp2) {
285 dev_dbg(&s->dev, "Vpp1 and Vpp2 must be the same\n");
286 ret = -EINVAL;
287 goto unlock;
288 }
289 s->socket.Vpp = mod->Vpp1;
290 if (s->ops->set_socket(s, &s->socket)) {
291 dev_printk(KERN_WARNING, &s->dev,
292 "Unable to set VPP\n");
293 ret = -EIO;
294 goto unlock;
295 }
296 } else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) ||
297 (mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
298 dev_dbg(&s->dev, "changing Vcc is not allowed at this time\n");
299 ret = -EINVAL;
300 goto unlock;
301 }
302
303 if (mod->Attributes & CONF_IO_CHANGE_WIDTH) {
304 pccard_io_map io_off = { 0, 0, 0, 0, 1 };
305 pccard_io_map io_on;
306 int i;
307
308 io_on.speed = io_speed;
309 for (i = 0; i < MAX_IO_WIN; i++) {
310 if (!s->io[i].res)
311 continue;
312 io_off.map = i;
313 io_on.map = i;
314
315 io_on.flags = MAP_ACTIVE | IO_DATA_PATH_WIDTH_8;
316 io_on.start = s->io[i].res->start;
317 io_on.stop = s->io[i].res->end;
318
319 s->ops->set_io_map(s, &io_off);
320 mdelay(40);
321 s->ops->set_io_map(s, &io_on);
322 }
323 }
324 ret = 0;
325 unlock:
326 mutex_unlock(&s->ops_mutex);
327
328 return ret;
329 } /* modify_configuration */
330 EXPORT_SYMBOL(pcmcia_modify_configuration);
331
332
333 int pcmcia_release_configuration(struct pcmcia_device *p_dev)
334 {
335 pccard_io_map io = { 0, 0, 0, 0, 1 };
336 struct pcmcia_socket *s = p_dev->socket;
337 config_t *c;
338 int i;
339
340 mutex_lock(&s->ops_mutex);
341 c = p_dev->function_config;
342 if (p_dev->_locked) {
343 p_dev->_locked = 0;
344 if (--(s->lock_count) == 0) {
345 s->socket.flags = SS_OUTPUT_ENA; /* Is this correct? */
346 s->socket.Vpp = 0;
347 s->socket.io_irq = 0;
348 s->ops->set_socket(s, &s->socket);
349 }
350 }
351 if (c->state & CONFIG_LOCKED) {
352 c->state &= ~CONFIG_LOCKED;
353 if (c->state & CONFIG_IO_REQ)
354 for (i = 0; i < MAX_IO_WIN; i++) {
355 if (!s->io[i].res)
356 continue;
357 s->io[i].Config--;
358 if (s->io[i].Config != 0)
359 continue;
360 io.map = i;
361 s->ops->set_io_map(s, &io);
362 }
363 }
364 mutex_unlock(&s->ops_mutex);
365
366 return 0;
367 } /* pcmcia_release_configuration */
368
369
370 /** pcmcia_release_io
371 *
372 * Release_io() releases the I/O ranges allocated by a client. This
373 * may be invoked some time after a card ejection has already dumped
374 * the actual socket configuration, so if the client is "stale", we
375 * don't bother checking the port ranges against the current socket
376 * values.
377 */
378 static int pcmcia_release_io(struct pcmcia_device *p_dev, io_req_t *req)
379 {
380 struct pcmcia_socket *s = p_dev->socket;
381 int ret = -EINVAL;
382 config_t *c;
383
384 mutex_lock(&s->ops_mutex);
385 c = p_dev->function_config;
386
387 if (!p_dev->_io)
388 goto out;
389
390 p_dev->_io = 0;
391
392 if ((c->io.BasePort1 != req->BasePort1) ||
393 (c->io.NumPorts1 != req->NumPorts1) ||
394 (c->io.BasePort2 != req->BasePort2) ||
395 (c->io.NumPorts2 != req->NumPorts2))
396 goto out;
397
398 c->state &= ~CONFIG_IO_REQ;
399
400 release_io_space(s, req->BasePort1, req->NumPorts1);
401 if (req->NumPorts2)
402 release_io_space(s, req->BasePort2, req->NumPorts2);
403
404 out:
405 mutex_unlock(&s->ops_mutex);
406
407 return ret;
408 } /* pcmcia_release_io */
409
410
411 static int pcmcia_release_irq(struct pcmcia_device *p_dev, irq_req_t *req)
412 {
413 struct pcmcia_socket *s = p_dev->socket;
414 config_t *c;
415 int ret = -EINVAL;
416
417 mutex_lock(&s->ops_mutex);
418
419 c = p_dev->function_config;
420
421 if (!p_dev->_irq)
422 goto out;
423
424 p_dev->_irq = 0;
425
426 if (c->state & CONFIG_LOCKED)
427 goto out;
428
429 if (c->irq.Attributes != req->Attributes) {
430 dev_dbg(&s->dev, "IRQ attributes must match assigned ones\n");
431 goto out;
432 }
433 if (s->pcmcia_irq != req->AssignedIRQ) {
434 dev_dbg(&s->dev, "IRQ must match assigned one\n");
435 goto out;
436 }
437
438 if (req->Handler)
439 free_irq(req->AssignedIRQ, p_dev->priv);
440
441 ret = 0;
442
443 out:
444 mutex_unlock(&s->ops_mutex);
445
446 return ret;
447 } /* pcmcia_release_irq */
448
449
450 int pcmcia_release_window(struct pcmcia_device *p_dev, window_handle_t wh)
451 {
452 struct pcmcia_socket *s = p_dev->socket;
453 pccard_mem_map *win;
454
455 wh--;
456 if (wh >= MAX_WIN)
457 return -EINVAL;
458
459 mutex_lock(&s->ops_mutex);
460 win = &s->win[wh];
461
462 if (!(p_dev->_win & CLIENT_WIN_REQ(wh))) {
463 dev_dbg(&s->dev, "not releasing unknown window\n");
464 mutex_unlock(&s->ops_mutex);
465 return -EINVAL;
466 }
467
468 /* Shut down memory window */
469 win->flags &= ~MAP_ACTIVE;
470 s->ops->set_mem_map(s, win);
471 s->state &= ~SOCKET_WIN_REQ(wh);
472
473 /* Release system memory */
474 if (win->res) {
475 release_resource(win->res);
476 kfree(win->res);
477 win->res = NULL;
478 }
479 p_dev->_win &= ~CLIENT_WIN_REQ(wh);
480 mutex_unlock(&s->ops_mutex);
481
482 return 0;
483 } /* pcmcia_release_window */
484 EXPORT_SYMBOL(pcmcia_release_window);
485
486
487 int pcmcia_request_configuration(struct pcmcia_device *p_dev,
488 config_req_t *req)
489 {
490 int i;
491 u_int base;
492 struct pcmcia_socket *s = p_dev->socket;
493 config_t *c;
494 pccard_io_map iomap;
495
496 if (!(s->state & SOCKET_PRESENT))
497 return -ENODEV;
498
499 if (req->IntType & INT_CARDBUS) {
500 dev_dbg(&s->dev, "IntType may not be INT_CARDBUS\n");
501 return -EINVAL;
502 }
503
504 mutex_lock(&s->ops_mutex);
505 c = p_dev->function_config;
506 if (c->state & CONFIG_LOCKED) {
507 mutex_unlock(&s->ops_mutex);
508 dev_dbg(&s->dev, "Configuration is locked\n");
509 return -EACCES;
510 }
511
512 /* Do power control. We don't allow changes in Vcc. */
513 s->socket.Vpp = req->Vpp;
514 if (s->ops->set_socket(s, &s->socket)) {
515 mutex_unlock(&s->ops_mutex);
516 dev_printk(KERN_WARNING, &s->dev,
517 "Unable to set socket state\n");
518 return -EINVAL;
519 }
520
521 /* Pick memory or I/O card, DMA mode, interrupt */
522 c->IntType = req->IntType;
523 c->Attributes = req->Attributes;
524 if (req->IntType & INT_MEMORY_AND_IO)
525 s->socket.flags |= SS_IOCARD;
526 if (req->IntType & INT_ZOOMED_VIDEO)
527 s->socket.flags |= SS_ZVCARD | SS_IOCARD;
528 if (req->Attributes & CONF_ENABLE_DMA)
529 s->socket.flags |= SS_DMA_MODE;
530 if (req->Attributes & CONF_ENABLE_SPKR)
531 s->socket.flags |= SS_SPKR_ENA;
532 if (req->Attributes & CONF_ENABLE_IRQ)
533 s->socket.io_irq = s->pcmcia_irq;
534 else
535 s->socket.io_irq = 0;
536 s->ops->set_socket(s, &s->socket);
537 s->lock_count++;
538 mutex_unlock(&s->ops_mutex);
539
540 /* Set up CIS configuration registers */
541 base = c->ConfigBase = req->ConfigBase;
542 c->CardValues = req->Present;
543 if (req->Present & PRESENT_COPY) {
544 c->Copy = req->Copy;
545 pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy);
546 }
547 if (req->Present & PRESENT_OPTION) {
548 if (s->functions == 1) {
549 c->Option = req->ConfigIndex & COR_CONFIG_MASK;
550 } else {
551 c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK;
552 c->Option |= COR_FUNC_ENA|COR_IREQ_ENA;
553 if (req->Present & PRESENT_IOBASE_0)
554 c->Option |= COR_ADDR_DECODE;
555 }
556 if (req->Attributes & CONF_ENABLE_IRQ)
557 if (!(c->irq.Attributes & IRQ_FORCED_PULSE))
558 c->Option |= COR_LEVEL_REQ;
559 pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option);
560 mdelay(40);
561 }
562 if (req->Present & PRESENT_STATUS) {
563 c->Status = req->Status;
564 pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status);
565 }
566 if (req->Present & PRESENT_PIN_REPLACE) {
567 c->Pin = req->Pin;
568 pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin);
569 }
570 if (req->Present & PRESENT_EXT_STATUS) {
571 c->ExtStatus = req->ExtStatus;
572 pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus);
573 }
574 if (req->Present & PRESENT_IOBASE_0) {
575 u_char b = c->io.BasePort1 & 0xff;
576 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
577 b = (c->io.BasePort1 >> 8) & 0xff;
578 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
579 }
580 if (req->Present & PRESENT_IOSIZE) {
581 u_char b = c->io.NumPorts1 + c->io.NumPorts2 - 1;
582 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
583 }
584
585 /* Configure I/O windows */
586 if (c->state & CONFIG_IO_REQ) {
587 mutex_lock(&s->ops_mutex);
588 iomap.speed = io_speed;
589 for (i = 0; i < MAX_IO_WIN; i++)
590 if (s->io[i].res) {
591 iomap.map = i;
592 iomap.flags = MAP_ACTIVE;
593 switch (s->io[i].res->flags & IO_DATA_PATH_WIDTH) {
594 case IO_DATA_PATH_WIDTH_16:
595 iomap.flags |= MAP_16BIT; break;
596 case IO_DATA_PATH_WIDTH_AUTO:
597 iomap.flags |= MAP_AUTOSZ; break;
598 default:
599 break;
600 }
601 iomap.start = s->io[i].res->start;
602 iomap.stop = s->io[i].res->end;
603 s->ops->set_io_map(s, &iomap);
604 s->io[i].Config++;
605 }
606 mutex_unlock(&s->ops_mutex);
607 }
608
609 c->state |= CONFIG_LOCKED;
610 p_dev->_locked = 1;
611 return 0;
612 } /* pcmcia_request_configuration */
613 EXPORT_SYMBOL(pcmcia_request_configuration);
614
615
616 /** pcmcia_request_io
617 *
618 * Request_io() reserves ranges of port addresses for a socket.
619 * I have not implemented range sharing or alias addressing.
620 */
621 int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req)
622 {
623 struct pcmcia_socket *s = p_dev->socket;
624 config_t *c;
625 int ret = -EINVAL;
626
627 mutex_lock(&s->ops_mutex);
628
629 if (!(s->state & SOCKET_PRESENT)) {
630 dev_dbg(&s->dev, "No card present\n");
631 goto out;
632 }
633
634 if (!req)
635 goto out;
636
637 c = p_dev->function_config;
638 if (c->state & CONFIG_LOCKED) {
639 dev_dbg(&s->dev, "Configuration is locked\n");
640 goto out;
641 }
642 if (c->state & CONFIG_IO_REQ) {
643 dev_dbg(&s->dev, "IO already configured\n");
644 goto out;
645 }
646 if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)) {
647 dev_dbg(&s->dev, "bad attribute setting for IO region 1\n");
648 goto out;
649 }
650 if ((req->NumPorts2 > 0) &&
651 (req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))) {
652 dev_dbg(&s->dev, "bad attribute setting for IO region 2\n");
653 goto out;
654 }
655
656 dev_dbg(&s->dev, "trying to allocate resource 1\n");
657 ret = alloc_io_space(s, req->Attributes1, &req->BasePort1,
658 req->NumPorts1, req->IOAddrLines);
659 if (ret) {
660 dev_dbg(&s->dev, "allocation of resource 1 failed\n");
661 goto out;
662 }
663
664 if (req->NumPorts2) {
665 dev_dbg(&s->dev, "trying to allocate resource 2\n");
666 ret = alloc_io_space(s, req->Attributes2, &req->BasePort2,
667 req->NumPorts2, req->IOAddrLines);
668 if (ret) {
669 dev_dbg(&s->dev, "allocation of resource 2 failed\n");
670 release_io_space(s, req->BasePort1, req->NumPorts1);
671 goto out;
672 }
673 }
674
675 c->io = *req;
676 c->state |= CONFIG_IO_REQ;
677 p_dev->_io = 1;
678 dev_dbg(&s->dev, "allocating resources succeeded: %d\n", ret);
679
680 out:
681 mutex_unlock(&s->ops_mutex);
682
683 return ret;
684 } /* pcmcia_request_io */
685 EXPORT_SYMBOL(pcmcia_request_io);
686
687
688 /** pcmcia_request_irq
689 *
690 * Request_irq() reserves an irq for this client.
691 */
692
693 int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req)
694 {
695 struct pcmcia_socket *s = p_dev->socket;
696 config_t *c;
697 int ret = -EINVAL, irq = p_dev->irq_v;
698 int type = IRQF_SHARED;
699
700 mutex_lock(&s->ops_mutex);
701
702 if (!(s->state & SOCKET_PRESENT)) {
703 dev_dbg(&s->dev, "No card present\n");
704 goto out;
705 }
706 c = p_dev->function_config;
707 if (c->state & CONFIG_LOCKED) {
708 dev_dbg(&s->dev, "Configuration is locked\n");
709 goto out;
710 }
711
712 if (!irq) {
713 dev_dbg(&s->dev, "no IRQ available\n");
714 goto out;
715 }
716
717 if (!(req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)) {
718 req->Attributes |= IRQ_TYPE_DYNAMIC_SHARING;
719 dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: the driver "
720 "needs updating to supported shared IRQ lines.\n");
721 }
722
723 if (req->Handler) {
724 ret = request_irq(irq, req->Handler, type,
725 p_dev->devname, p_dev->priv);
726 if (ret) {
727 dev_printk(KERN_INFO, &s->dev,
728 "request_irq() failed\n");
729 goto out;
730 }
731 }
732
733 c->irq.Attributes = req->Attributes;
734 req->AssignedIRQ = irq;
735
736 p_dev->_irq = 1;
737
738 ret = 0;
739 out:
740 mutex_unlock(&s->ops_mutex);
741 return ret;
742 } /* pcmcia_request_irq */
743 EXPORT_SYMBOL(pcmcia_request_irq);
744
745
746 #ifdef CONFIG_PCMCIA_PROBE
747
748 /* mask of IRQs already reserved by other cards, we should avoid using them */
749 static u8 pcmcia_used_irq[NR_IRQS];
750
751 static irqreturn_t test_action(int cpl, void *dev_id)
752 {
753 return IRQ_NONE;
754 }
755
756 /**
757 * pcmcia_setup_isa_irq() - determine whether an ISA IRQ can be used
758 * @p_dev - the associated PCMCIA device
759 *
760 * locking note: must be called with ops_mutex locked.
761 */
762 static int pcmcia_setup_isa_irq(struct pcmcia_device *p_dev, int type)
763 {
764 struct pcmcia_socket *s = p_dev->socket;
765 unsigned int try, irq;
766 u32 mask = s->irq_mask;
767 int ret = -ENODEV;
768
769 for (try = 0; try < 64; try++) {
770 irq = try % 32;
771
772 /* marked as available by driver, not blocked by userspace? */
773 if (!((mask >> irq) & 1))
774 continue;
775
776 /* avoid an IRQ which is already used by another PCMCIA card */
777 if ((try < 32) && pcmcia_used_irq[irq])
778 continue;
779
780 /* register the correct driver, if possible, to check whether
781 * registering a dummy handle works, i.e. if the IRQ isn't
782 * marked as used by the kernel resource management core */
783 ret = request_irq(irq, test_action, type, p_dev->devname,
784 p_dev);
785 if (!ret) {
786 free_irq(irq, p_dev);
787 p_dev->irq_v = s->pcmcia_irq = irq;
788 pcmcia_used_irq[irq]++;
789 break;
790 }
791 }
792
793 return ret;
794 }
795
796 void pcmcia_cleanup_irq(struct pcmcia_socket *s)
797 {
798 pcmcia_used_irq[s->pcmcia_irq]--;
799 s->pcmcia_irq = 0;
800 }
801
802 #else /* CONFIG_PCMCIA_PROBE */
803
804 static int pcmcia_setup_isa_irq(struct pcmcia_device *p_dev, int type)
805 {
806 return -EINVAL;
807 }
808
809 void pcmcia_cleanup_irq(struct pcmcia_socket *s)
810 {
811 s->pcmcia_irq = 0;
812 return;
813 }
814
815 #endif /* CONFIG_PCMCIA_PROBE */
816
817
818 /**
819 * pcmcia_setup_irq() - determine IRQ to be used for device
820 * @p_dev - the associated PCMCIA device
821 *
822 * locking note: must be called with ops_mutex locked.
823 */
824 int pcmcia_setup_irq(struct pcmcia_device *p_dev)
825 {
826 struct pcmcia_socket *s = p_dev->socket;
827
828 if (p_dev->irq_v)
829 return 0;
830
831 /* already assigned? */
832 if (s->pcmcia_irq) {
833 p_dev->irq_v = s->pcmcia_irq;
834 return 0;
835 }
836
837 /* prefer an exclusive ISA irq */
838 if (!pcmcia_setup_isa_irq(p_dev, 0))
839 return 0;
840
841 /* but accept a shared ISA irq */
842 if (!pcmcia_setup_isa_irq(p_dev, IRQF_SHARED))
843 return 0;
844
845 /* but use the PCI irq otherwise */
846 if (s->pci_irq) {
847 p_dev->irq_v = s->pcmcia_irq = s->pci_irq;
848 return 0;
849 }
850
851 return -EINVAL;
852 }
853
854
855 /** pcmcia_request_window
856 *
857 * Request_window() establishes a mapping between card memory space
858 * and system memory space.
859 */
860 int pcmcia_request_window(struct pcmcia_device *p_dev, win_req_t *req, window_handle_t *wh)
861 {
862 struct pcmcia_socket *s = p_dev->socket;
863 pccard_mem_map *win;
864 u_long align;
865 int w;
866
867 if (!(s->state & SOCKET_PRESENT)) {
868 dev_dbg(&s->dev, "No card present\n");
869 return -ENODEV;
870 }
871 if (req->Attributes & (WIN_PAGED | WIN_SHARED)) {
872 dev_dbg(&s->dev, "bad attribute setting for iomem region\n");
873 return -EINVAL;
874 }
875
876 /* Window size defaults to smallest available */
877 if (req->Size == 0)
878 req->Size = s->map_size;
879 align = (((s->features & SS_CAP_MEM_ALIGN) ||
880 (req->Attributes & WIN_STRICT_ALIGN)) ?
881 req->Size : s->map_size);
882 if (req->Size & (s->map_size-1)) {
883 dev_dbg(&s->dev, "invalid map size\n");
884 return -EINVAL;
885 }
886 if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) ||
887 (req->Base & (align-1))) {
888 dev_dbg(&s->dev, "invalid base address\n");
889 return -EINVAL;
890 }
891 if (req->Base)
892 align = 0;
893
894 /* Allocate system memory window */
895 for (w = 0; w < MAX_WIN; w++)
896 if (!(s->state & SOCKET_WIN_REQ(w)))
897 break;
898 if (w == MAX_WIN) {
899 dev_dbg(&s->dev, "all windows are used already\n");
900 return -EINVAL;
901 }
902
903 mutex_lock(&s->ops_mutex);
904 win = &s->win[w];
905
906 if (!(s->features & SS_CAP_STATIC_MAP)) {
907 win->res = pcmcia_find_mem_region(req->Base, req->Size, align,
908 (req->Attributes & WIN_MAP_BELOW_1MB), s);
909 if (!win->res) {
910 dev_dbg(&s->dev, "allocating mem region failed\n");
911 mutex_unlock(&s->ops_mutex);
912 return -EINVAL;
913 }
914 }
915 p_dev->_win |= CLIENT_WIN_REQ(w);
916
917 /* Configure the socket controller */
918 win->map = w+1;
919 win->flags = 0;
920 win->speed = req->AccessSpeed;
921 if (req->Attributes & WIN_MEMORY_TYPE)
922 win->flags |= MAP_ATTRIB;
923 if (req->Attributes & WIN_ENABLE)
924 win->flags |= MAP_ACTIVE;
925 if (req->Attributes & WIN_DATA_WIDTH_16)
926 win->flags |= MAP_16BIT;
927 if (req->Attributes & WIN_USE_WAIT)
928 win->flags |= MAP_USE_WAIT;
929 win->card_start = 0;
930
931 if (s->ops->set_mem_map(s, win) != 0) {
932 dev_dbg(&s->dev, "failed to set memory mapping\n");
933 mutex_unlock(&s->ops_mutex);
934 return -EIO;
935 }
936 s->state |= SOCKET_WIN_REQ(w);
937
938 /* Return window handle */
939 if (s->features & SS_CAP_STATIC_MAP)
940 req->Base = win->static_start;
941 else
942 req->Base = win->res->start;
943
944 mutex_unlock(&s->ops_mutex);
945 *wh = w + 1;
946
947 return 0;
948 } /* pcmcia_request_window */
949 EXPORT_SYMBOL(pcmcia_request_window);
950
951 void pcmcia_disable_device(struct pcmcia_device *p_dev)
952 {
953 pcmcia_release_configuration(p_dev);
954 pcmcia_release_io(p_dev, &p_dev->io);
955 pcmcia_release_irq(p_dev, &p_dev->irq);
956 if (p_dev->win)
957 pcmcia_release_window(p_dev, p_dev->win);
958 }
959 EXPORT_SYMBOL(pcmcia_disable_device);
960
961
962 struct pcmcia_cfg_mem {
963 struct pcmcia_device *p_dev;
964 void *priv_data;
965 int (*conf_check) (struct pcmcia_device *p_dev,
966 cistpl_cftable_entry_t *cfg,
967 cistpl_cftable_entry_t *dflt,
968 unsigned int vcc,
969 void *priv_data);
970 cisparse_t parse;
971 cistpl_cftable_entry_t dflt;
972 };
973
974 /**
975 * pcmcia_do_loop_config() - internal helper for pcmcia_loop_config()
976 *
977 * pcmcia_do_loop_config() is the internal callback for the call from
978 * pcmcia_loop_config() to pccard_loop_tuple(). Data is transferred
979 * by a struct pcmcia_cfg_mem.
980 */
981 static int pcmcia_do_loop_config(tuple_t *tuple, cisparse_t *parse, void *priv)
982 {
983 cistpl_cftable_entry_t *cfg = &parse->cftable_entry;
984 struct pcmcia_cfg_mem *cfg_mem = priv;
985
986 /* default values */
987 cfg_mem->p_dev->conf.ConfigIndex = cfg->index;
988 if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
989 cfg_mem->dflt = *cfg;
990
991 return cfg_mem->conf_check(cfg_mem->p_dev, cfg, &cfg_mem->dflt,
992 cfg_mem->p_dev->socket->socket.Vcc,
993 cfg_mem->priv_data);
994 }
995
996 /**
997 * pcmcia_loop_config() - loop over configuration options
998 * @p_dev: the struct pcmcia_device which we need to loop for.
999 * @conf_check: function to call for each configuration option.
1000 * It gets passed the struct pcmcia_device, the CIS data
1001 * describing the configuration option, and private data
1002 * being passed to pcmcia_loop_config()
1003 * @priv_data: private data to be passed to the conf_check function.
1004 *
1005 * pcmcia_loop_config() loops over all configuration options, and calls
1006 * the driver-specific conf_check() for each one, checking whether
1007 * it is a valid one. Returns 0 on success or errorcode otherwise.
1008 */
1009 int pcmcia_loop_config(struct pcmcia_device *p_dev,
1010 int (*conf_check) (struct pcmcia_device *p_dev,
1011 cistpl_cftable_entry_t *cfg,
1012 cistpl_cftable_entry_t *dflt,
1013 unsigned int vcc,
1014 void *priv_data),
1015 void *priv_data)
1016 {
1017 struct pcmcia_cfg_mem *cfg_mem;
1018 int ret;
1019
1020 cfg_mem = kzalloc(sizeof(struct pcmcia_cfg_mem), GFP_KERNEL);
1021 if (cfg_mem == NULL)
1022 return -ENOMEM;
1023
1024 cfg_mem->p_dev = p_dev;
1025 cfg_mem->conf_check = conf_check;
1026 cfg_mem->priv_data = priv_data;
1027
1028 ret = pccard_loop_tuple(p_dev->socket, p_dev->func,
1029 CISTPL_CFTABLE_ENTRY, &cfg_mem->parse,
1030 cfg_mem, pcmcia_do_loop_config);
1031
1032 kfree(cfg_mem);
1033 return ret;
1034 }
1035 EXPORT_SYMBOL(pcmcia_loop_config);
1036
1037
1038 struct pcmcia_loop_mem {
1039 struct pcmcia_device *p_dev;
1040 void *priv_data;
1041 int (*loop_tuple) (struct pcmcia_device *p_dev,
1042 tuple_t *tuple,
1043 void *priv_data);
1044 };
1045
1046 /**
1047 * pcmcia_do_loop_tuple() - internal helper for pcmcia_loop_config()
1048 *
1049 * pcmcia_do_loop_tuple() is the internal callback for the call from
1050 * pcmcia_loop_tuple() to pccard_loop_tuple(). Data is transferred
1051 * by a struct pcmcia_cfg_mem.
1052 */
1053 static int pcmcia_do_loop_tuple(tuple_t *tuple, cisparse_t *parse, void *priv)
1054 {
1055 struct pcmcia_loop_mem *loop = priv;
1056
1057 return loop->loop_tuple(loop->p_dev, tuple, loop->priv_data);
1058 };
1059
1060 /**
1061 * pcmcia_loop_tuple() - loop over tuples in the CIS
1062 * @p_dev: the struct pcmcia_device which we need to loop for.
1063 * @code: which CIS code shall we look for?
1064 * @priv_data: private data to be passed to the loop_tuple function.
1065 * @loop_tuple: function to call for each CIS entry of type @function. IT
1066 * gets passed the raw tuple and @priv_data.
1067 *
1068 * pcmcia_loop_tuple() loops over all CIS entries of type @function, and
1069 * calls the @loop_tuple function for each entry. If the call to @loop_tuple
1070 * returns 0, the loop exits. Returns 0 on success or errorcode otherwise.
1071 */
1072 int pcmcia_loop_tuple(struct pcmcia_device *p_dev, cisdata_t code,
1073 int (*loop_tuple) (struct pcmcia_device *p_dev,
1074 tuple_t *tuple,
1075 void *priv_data),
1076 void *priv_data)
1077 {
1078 struct pcmcia_loop_mem loop = {
1079 .p_dev = p_dev,
1080 .loop_tuple = loop_tuple,
1081 .priv_data = priv_data};
1082
1083 return pccard_loop_tuple(p_dev->socket, p_dev->func, code, NULL,
1084 &loop, pcmcia_do_loop_tuple);
1085 }
1086 EXPORT_SYMBOL(pcmcia_loop_tuple);
1087
1088
1089 struct pcmcia_loop_get {
1090 size_t len;
1091 cisdata_t **buf;
1092 };
1093
1094 /**
1095 * pcmcia_do_get_tuple() - internal helper for pcmcia_get_tuple()
1096 *
1097 * pcmcia_do_get_tuple() is the internal callback for the call from
1098 * pcmcia_get_tuple() to pcmcia_loop_tuple(). As we're only interested in
1099 * the first tuple, return 0 unconditionally. Create a memory buffer large
1100 * enough to hold the content of the tuple, and fill it with the tuple data.
1101 * The caller is responsible to free the buffer.
1102 */
1103 static int pcmcia_do_get_tuple(struct pcmcia_device *p_dev, tuple_t *tuple,
1104 void *priv)
1105 {
1106 struct pcmcia_loop_get *get = priv;
1107
1108 *get->buf = kzalloc(tuple->TupleDataLen, GFP_KERNEL);
1109 if (*get->buf) {
1110 get->len = tuple->TupleDataLen;
1111 memcpy(*get->buf, tuple->TupleData, tuple->TupleDataLen);
1112 } else
1113 dev_dbg(&p_dev->dev, "do_get_tuple: out of memory\n");
1114 return 0;
1115 }
1116
1117 /**
1118 * pcmcia_get_tuple() - get first tuple from CIS
1119 * @p_dev: the struct pcmcia_device which we need to loop for.
1120 * @code: which CIS code shall we look for?
1121 * @buf: pointer to store the buffer to.
1122 *
1123 * pcmcia_get_tuple() gets the content of the first CIS entry of type @code.
1124 * It returns the buffer length (or zero). The caller is responsible to free
1125 * the buffer passed in @buf.
1126 */
1127 size_t pcmcia_get_tuple(struct pcmcia_device *p_dev, cisdata_t code,
1128 unsigned char **buf)
1129 {
1130 struct pcmcia_loop_get get = {
1131 .len = 0,
1132 .buf = buf,
1133 };
1134
1135 *get.buf = NULL;
1136 pcmcia_loop_tuple(p_dev, code, pcmcia_do_get_tuple, &get);
1137
1138 return get.len;
1139 }
1140 EXPORT_SYMBOL(pcmcia_get_tuple);
1141
1142
1143 /**
1144 * pcmcia_do_get_mac() - internal helper for pcmcia_get_mac_from_cis()
1145 *
1146 * pcmcia_do_get_mac() is the internal callback for the call from
1147 * pcmcia_get_mac_from_cis() to pcmcia_loop_tuple(). We check whether the
1148 * tuple contains a proper LAN_NODE_ID of length 6, and copy the data
1149 * to struct net_device->dev_addr[i].
1150 */
1151 static int pcmcia_do_get_mac(struct pcmcia_device *p_dev, tuple_t *tuple,
1152 void *priv)
1153 {
1154 struct net_device *dev = priv;
1155 int i;
1156
1157 if (tuple->TupleData[0] != CISTPL_FUNCE_LAN_NODE_ID)
1158 return -EINVAL;
1159 if (tuple->TupleDataLen < ETH_ALEN + 2) {
1160 dev_warn(&p_dev->dev, "Invalid CIS tuple length for "
1161 "LAN_NODE_ID\n");
1162 return -EINVAL;
1163 }
1164
1165 if (tuple->TupleData[1] != ETH_ALEN) {
1166 dev_warn(&p_dev->dev, "Invalid header for LAN_NODE_ID\n");
1167 return -EINVAL;
1168 }
1169 for (i = 0; i < 6; i++)
1170 dev->dev_addr[i] = tuple->TupleData[i+2];
1171 return 0;
1172 }
1173
1174 /**
1175 * pcmcia_get_mac_from_cis() - read out MAC address from CISTPL_FUNCE
1176 * @p_dev: the struct pcmcia_device for which we want the address.
1177 * @dev: a properly prepared struct net_device to store the info to.
1178 *
1179 * pcmcia_get_mac_from_cis() reads out the hardware MAC address from
1180 * CISTPL_FUNCE and stores it into struct net_device *dev->dev_addr which
1181 * must be set up properly by the driver (see examples!).
1182 */
1183 int pcmcia_get_mac_from_cis(struct pcmcia_device *p_dev, struct net_device *dev)
1184 {
1185 return pcmcia_loop_tuple(p_dev, CISTPL_FUNCE, pcmcia_do_get_mac, dev);
1186 }
1187 EXPORT_SYMBOL(pcmcia_get_mac_from_cis);
1188
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