?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
USB: serial: refactor read urb submission in generic driver
[linux-2.6.git] / drivers / pcmcia / pcmcia_resource.c
blob7c3d03bb4f304eac0b22fb1ae99db20026133d44
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 <pcmcia/cs_types.h>
27 #include <pcmcia/ss.h>
28 #include <pcmcia/cs.h>
29 #include <pcmcia/cistpl.h>
30 #include <pcmcia/cisreg.h>
31 #include <pcmcia/ds.h>
32
33 #include "cs_internal.h"
34
35
36 /* Access speed for IO windows */
37 static int io_speed;
38 module_param(io_speed, int, 0444);
39
40
41 #ifdef CONFIG_PCMCIA_PROBE
42 #include <asm/irq.h>
43 /* mask of IRQs already reserved by other cards, we should avoid using them */
44 static u8 pcmcia_used_irq[NR_IRQS];
45 #endif
46
47 static int pcmcia_adjust_io_region(struct resource *res, unsigned long start,
48 unsigned long end, struct pcmcia_socket *s)
49 {
50 if (s->resource_ops->adjust_io_region)
51 return s->resource_ops->adjust_io_region(res, start, end, s);
52 return -ENOMEM;
53 }
54
55 static struct resource *pcmcia_find_io_region(unsigned long base, int num,
56 unsigned long align,
57 struct pcmcia_socket *s)
58 {
59 if (s->resource_ops->find_io)
60 return s->resource_ops->find_io(base, num, align, s);
61 return NULL;
62 }
63
64 int pcmcia_validate_mem(struct pcmcia_socket *s)
65 {
66 if (s->resource_ops->validate_mem)
67 return s->resource_ops->validate_mem(s);
68 /* if there is no callback, we can assume that everything is OK */
69 return 0;
70 }
71
72 struct resource *pcmcia_find_mem_region(u_long base, u_long num, u_long align,
73 int low, struct pcmcia_socket *s)
74 {
75 if (s->resource_ops->find_mem)
76 return s->resource_ops->find_mem(base, num, align, low, s);
77 return NULL;
78 }
79
80
81 /** alloc_io_space
82 *
83 * Special stuff for managing IO windows, because they are scarce
84 */
85
86 static int alloc_io_space(struct pcmcia_socket *s, u_int attr,
87 unsigned int *base, unsigned int num, u_int lines)
88 {
89 int i;
90 unsigned int try, align;
91
92 align = (*base) ? (lines ? 1<<lines : 0) : 1;
93 if (align && (align < num)) {
94 if (*base) {
95 dev_dbg(&s->dev, "odd IO request: num %#x align %#x\n",
96 num, align);
97 align = 0;
98 } else
99 while (align && (align < num))
100 align <<= 1;
101 }
102 if (*base & ~(align-1)) {
103 dev_dbg(&s->dev, "odd IO request: base %#x align %#x\n",
104 *base, align);
105 align = 0;
106 }
107 if ((s->features & SS_CAP_STATIC_MAP) && s->io_offset) {
108 *base = s->io_offset | (*base & 0x0fff);
109 return 0;
110 }
111 /* Check for an already-allocated window that must conflict with
112 * what was asked for. It is a hack because it does not catch all
113 * potential conflicts, just the most obvious ones.
114 */
115 for (i = 0; i < MAX_IO_WIN; i++)
116 if ((s->io[i].res) && *base &&
117 ((s->io[i].res->start & (align-1)) == *base))
118 return 1;
119 for (i = 0; i < MAX_IO_WIN; i++) {
120 if (!s->io[i].res) {
121 s->io[i].res = pcmcia_find_io_region(*base, num, align, s);
122 if (s->io[i].res) {
123 *base = s->io[i].res->start;
124 s->io[i].res->flags = (s->io[i].res->flags & ~IORESOURCE_BITS) | (attr & IORESOURCE_BITS);
125 s->io[i].InUse = num;
126 break;
127 } else
128 return 1;
129 } else if ((s->io[i].res->flags & IORESOURCE_BITS) != (attr & IORESOURCE_BITS))
130 continue;
131 /* Try to extend top of window */
132 try = s->io[i].res->end + 1;
133 if ((*base == 0) || (*base == try))
134 if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start,
135 s->io[i].res->end + num, s) == 0) {
136 *base = try;
137 s->io[i].InUse += num;
138 break;
139 }
140 /* Try to extend bottom of window */
141 try = s->io[i].res->start - num;
142 if ((*base == 0) || (*base == try))
143 if (pcmcia_adjust_io_region(s->io[i].res, s->io[i].res->start - num,
144 s->io[i].res->end, s) == 0) {
145 *base = try;
146 s->io[i].InUse += num;
147 break;
148 }
149 }
150 return (i == MAX_IO_WIN);
151 } /* alloc_io_space */
152
153
154 static void release_io_space(struct pcmcia_socket *s, unsigned int base,
155 unsigned int num)
156 {
157 int i;
158
159 for (i = 0; i < MAX_IO_WIN; i++) {
160 if (!s->io[i].res)
161 continue;
162 if ((s->io[i].res->start <= base) &&
163 (s->io[i].res->end >= base+num-1)) {
164 s->io[i].InUse -= num;
165 /* Free the window if no one else is using it */
166 if (s->io[i].InUse == 0) {
167 release_resource(s->io[i].res);
168 kfree(s->io[i].res);
169 s->io[i].res = NULL;
170 }
171 }
172 }
173 } /* release_io_space */
174
175
176 /** pccard_access_configuration_register
177 *
178 * Access_configuration_register() reads and writes configuration
179 * registers in attribute memory. Memory window 0 is reserved for
180 * this and the tuple reading services.
181 */
182
183 int pcmcia_access_configuration_register(struct pcmcia_device *p_dev,
184 conf_reg_t *reg)
185 {
186 struct pcmcia_socket *s;
187 config_t *c;
188 int addr;
189 u_char val;
190
191 if (!p_dev || !p_dev->function_config)
192 return -EINVAL;
193
194 s = p_dev->socket;
195
196 mutex_lock(&s->ops_mutex);
197 c = p_dev->function_config;
198
199 if (!(c->state & CONFIG_LOCKED)) {
200 dev_dbg(&s->dev, "Configuration isnt't locked\n");
201 mutex_unlock(&s->ops_mutex);
202 return -EACCES;
203 }
204
205 addr = (c->ConfigBase + reg->Offset) >> 1;
206 mutex_unlock(&s->ops_mutex);
207
208 switch (reg->Action) {
209 case CS_READ:
210 pcmcia_read_cis_mem(s, 1, addr, 1, &val);
211 reg->Value = val;
212 break;
213 case CS_WRITE:
214 val = reg->Value;
215 pcmcia_write_cis_mem(s, 1, addr, 1, &val);
216 break;
217 default:
218 dev_dbg(&s->dev, "Invalid conf register request\n");
219 return -EINVAL;
220 break;
221 }
222 return 0;
223 } /* pcmcia_access_configuration_register */
224 EXPORT_SYMBOL(pcmcia_access_configuration_register);
225
226
227 int pcmcia_map_mem_page(struct pcmcia_device *p_dev, window_handle_t wh,
228 memreq_t *req)
229 {
230 struct pcmcia_socket *s = p_dev->socket;
231 int ret;
232
233 wh--;
234 if (wh >= MAX_WIN)
235 return -EINVAL;
236 if (req->Page != 0) {
237 dev_dbg(&s->dev, "failure: requested page is zero\n");
238 return -EINVAL;
239 }
240 mutex_lock(&s->ops_mutex);
241 s->win[wh].card_start = req->CardOffset;
242 ret = s->ops->set_mem_map(s, &s->win[wh]);
243 if (ret)
244 dev_warn(&s->dev, "failed to set_mem_map\n");
245 mutex_unlock(&s->ops_mutex);
246 return ret;
247 } /* pcmcia_map_mem_page */
248 EXPORT_SYMBOL(pcmcia_map_mem_page);
249
250
251 /** pcmcia_modify_configuration
252 *
253 * Modify a locked socket configuration
254 */
255 int pcmcia_modify_configuration(struct pcmcia_device *p_dev,
256 modconf_t *mod)
257 {
258 struct pcmcia_socket *s;
259 config_t *c;
260 int ret;
261
262 s = p_dev->socket;
263
264 mutex_lock(&s->ops_mutex);
265 c = p_dev->function_config;
266
267 if (!(s->state & SOCKET_PRESENT)) {
268 dev_dbg(&s->dev, "No card present\n");
269 ret = -ENODEV;
270 goto unlock;
271 }
272 if (!(c->state & CONFIG_LOCKED)) {
273 dev_dbg(&s->dev, "Configuration isnt't locked\n");
274 ret = -EACCES;
275 goto unlock;
276 }
277
278 if (mod->Attributes & CONF_IRQ_CHANGE_VALID) {
279 if (mod->Attributes & CONF_ENABLE_IRQ) {
280 c->Attributes |= CONF_ENABLE_IRQ;
281 s->socket.io_irq = s->irq.AssignedIRQ;
282 } else {
283 c->Attributes &= ~CONF_ENABLE_IRQ;
284 s->socket.io_irq = 0;
285 }
286 s->ops->set_socket(s, &s->socket);
287 }
288
289 if (mod->Attributes & CONF_VCC_CHANGE_VALID) {
290 dev_dbg(&s->dev, "changing Vcc is not allowed at this time\n");
291 ret = -EINVAL;
292 goto unlock;
293 }
294
295 /* We only allow changing Vpp1 and Vpp2 to the same value */
296 if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) &&
297 (mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
298 if (mod->Vpp1 != mod->Vpp2) {
299 dev_dbg(&s->dev, "Vpp1 and Vpp2 must be the same\n");
300 ret = -EINVAL;
301 goto unlock;
302 }
303 s->socket.Vpp = mod->Vpp1;
304 if (s->ops->set_socket(s, &s->socket)) {
305 dev_printk(KERN_WARNING, &s->dev,
306 "Unable to set VPP\n");
307 ret = -EIO;
308 goto unlock;
309 }
310 } else if ((mod->Attributes & CONF_VPP1_CHANGE_VALID) ||
311 (mod->Attributes & CONF_VPP2_CHANGE_VALID)) {
312 dev_dbg(&s->dev, "changing Vcc is not allowed at this time\n");
313 ret = -EINVAL;
314 goto unlock;
315 }
316
317 if (mod->Attributes & CONF_IO_CHANGE_WIDTH) {
318 pccard_io_map io_off = { 0, 0, 0, 0, 1 };
319 pccard_io_map io_on;
320 int i;
321
322 io_on.speed = io_speed;
323 for (i = 0; i < MAX_IO_WIN; i++) {
324 if (!s->io[i].res)
325 continue;
326 io_off.map = i;
327 io_on.map = i;
328
329 io_on.flags = MAP_ACTIVE | IO_DATA_PATH_WIDTH_8;
330 io_on.start = s->io[i].res->start;
331 io_on.stop = s->io[i].res->end;
332
333 s->ops->set_io_map(s, &io_off);
334 mdelay(40);
335 s->ops->set_io_map(s, &io_on);
336 }
337 }
338 ret = 0;
339 unlock:
340 mutex_unlock(&s->ops_mutex);
341
342 return ret;
343 } /* modify_configuration */
344 EXPORT_SYMBOL(pcmcia_modify_configuration);
345
346
347 int pcmcia_release_configuration(struct pcmcia_device *p_dev)
348 {
349 pccard_io_map io = { 0, 0, 0, 0, 1 };
350 struct pcmcia_socket *s = p_dev->socket;
351 config_t *c;
352 int i;
353
354 mutex_lock(&s->ops_mutex);
355 c = p_dev->function_config;
356 if (p_dev->_locked) {
357 p_dev->_locked = 0;
358 if (--(s->lock_count) == 0) {
359 s->socket.flags = SS_OUTPUT_ENA; /* Is this correct? */
360 s->socket.Vpp = 0;
361 s->socket.io_irq = 0;
362 s->ops->set_socket(s, &s->socket);
363 }
364 }
365 if (c->state & CONFIG_LOCKED) {
366 c->state &= ~CONFIG_LOCKED;
367 if (c->state & CONFIG_IO_REQ)
368 for (i = 0; i < MAX_IO_WIN; i++) {
369 if (!s->io[i].res)
370 continue;
371 s->io[i].Config--;
372 if (s->io[i].Config != 0)
373 continue;
374 io.map = i;
375 s->ops->set_io_map(s, &io);
376 }
377 }
378 mutex_unlock(&s->ops_mutex);
379
380 return 0;
381 } /* pcmcia_release_configuration */
382
383
384 /** pcmcia_release_io
385 *
386 * Release_io() releases the I/O ranges allocated by a client. This
387 * may be invoked some time after a card ejection has already dumped
388 * the actual socket configuration, so if the client is "stale", we
389 * don't bother checking the port ranges against the current socket
390 * values.
391 */
392 static int pcmcia_release_io(struct pcmcia_device *p_dev, io_req_t *req)
393 {
394 struct pcmcia_socket *s = p_dev->socket;
395 int ret = -EINVAL;
396 config_t *c;
397
398 mutex_lock(&s->ops_mutex);
399 c = p_dev->function_config;
400
401 if (!p_dev->_io)
402 goto out;
403
404 p_dev->_io = 0;
405
406 if ((c->io.BasePort1 != req->BasePort1) ||
407 (c->io.NumPorts1 != req->NumPorts1) ||
408 (c->io.BasePort2 != req->BasePort2) ||
409 (c->io.NumPorts2 != req->NumPorts2))
410 goto out;
411
412 c->state &= ~CONFIG_IO_REQ;
413
414 release_io_space(s, req->BasePort1, req->NumPorts1);
415 if (req->NumPorts2)
416 release_io_space(s, req->BasePort2, req->NumPorts2);
417
418 out:
419 mutex_unlock(&s->ops_mutex);
420
421 return ret;
422 } /* pcmcia_release_io */
423
424
425 static int pcmcia_release_irq(struct pcmcia_device *p_dev, irq_req_t *req)
426 {
427 struct pcmcia_socket *s = p_dev->socket;
428 config_t *c;
429 int ret = -EINVAL;
430
431 mutex_lock(&s->ops_mutex);
432
433 c = p_dev->function_config;
434
435 if (!p_dev->_irq)
436 goto out;
437
438 p_dev->_irq = 0;
439
440 if (c->state & CONFIG_LOCKED)
441 goto out;
442
443 if (c->irq.Attributes != req->Attributes) {
444 dev_dbg(&s->dev, "IRQ attributes must match assigned ones\n");
445 goto out;
446 }
447 if (s->irq.AssignedIRQ != req->AssignedIRQ) {
448 dev_dbg(&s->dev, "IRQ must match assigned one\n");
449 goto out;
450 }
451 if (--s->irq.Config == 0) {
452 c->state &= ~CONFIG_IRQ_REQ;
453 s->irq.AssignedIRQ = 0;
454 }
455
456 if (req->Handler)
457 free_irq(req->AssignedIRQ, p_dev->priv);
458
459 #ifdef CONFIG_PCMCIA_PROBE
460 pcmcia_used_irq[req->AssignedIRQ]--;
461 #endif
462 ret = 0;
463
464 out:
465 mutex_unlock(&s->ops_mutex);
466
467 return ret;
468 } /* pcmcia_release_irq */
469
470
471 int pcmcia_release_window(struct pcmcia_device *p_dev, window_handle_t wh)
472 {
473 struct pcmcia_socket *s = p_dev->socket;
474 pccard_mem_map *win;
475
476 wh--;
477 if (wh >= MAX_WIN)
478 return -EINVAL;
479
480 mutex_lock(&s->ops_mutex);
481 win = &s->win[wh];
482
483 if (!(p_dev->_win & CLIENT_WIN_REQ(wh))) {
484 dev_dbg(&s->dev, "not releasing unknown window\n");
485 mutex_unlock(&s->ops_mutex);
486 return -EINVAL;
487 }
488
489 /* Shut down memory window */
490 win->flags &= ~MAP_ACTIVE;
491 s->ops->set_mem_map(s, win);
492 s->state &= ~SOCKET_WIN_REQ(wh);
493
494 /* Release system memory */
495 if (win->res) {
496 release_resource(win->res);
497 kfree(win->res);
498 win->res = NULL;
499 }
500 p_dev->_win &= ~CLIENT_WIN_REQ(wh);
501 mutex_unlock(&s->ops_mutex);
502
503 return 0;
504 } /* pcmcia_release_window */
505 EXPORT_SYMBOL(pcmcia_release_window);
506
507
508 int pcmcia_request_configuration(struct pcmcia_device *p_dev,
509 config_req_t *req)
510 {
511 int i;
512 u_int base;
513 struct pcmcia_socket *s = p_dev->socket;
514 config_t *c;
515 pccard_io_map iomap;
516
517 if (!(s->state & SOCKET_PRESENT))
518 return -ENODEV;
519
520 if (req->IntType & INT_CARDBUS) {
521 dev_dbg(&s->dev, "IntType may not be INT_CARDBUS\n");
522 return -EINVAL;
523 }
524
525 mutex_lock(&s->ops_mutex);
526 c = p_dev->function_config;
527 if (c->state & CONFIG_LOCKED) {
528 mutex_unlock(&s->ops_mutex);
529 dev_dbg(&s->dev, "Configuration is locked\n");
530 return -EACCES;
531 }
532
533 /* Do power control. We don't allow changes in Vcc. */
534 s->socket.Vpp = req->Vpp;
535 if (s->ops->set_socket(s, &s->socket)) {
536 mutex_unlock(&s->ops_mutex);
537 dev_printk(KERN_WARNING, &s->dev,
538 "Unable to set socket state\n");
539 return -EINVAL;
540 }
541
542 /* Pick memory or I/O card, DMA mode, interrupt */
543 c->IntType = req->IntType;
544 c->Attributes = req->Attributes;
545 if (req->IntType & INT_MEMORY_AND_IO)
546 s->socket.flags |= SS_IOCARD;
547 if (req->IntType & INT_ZOOMED_VIDEO)
548 s->socket.flags |= SS_ZVCARD | SS_IOCARD;
549 if (req->Attributes & CONF_ENABLE_DMA)
550 s->socket.flags |= SS_DMA_MODE;
551 if (req->Attributes & CONF_ENABLE_SPKR)
552 s->socket.flags |= SS_SPKR_ENA;
553 if (req->Attributes & CONF_ENABLE_IRQ)
554 s->socket.io_irq = s->irq.AssignedIRQ;
555 else
556 s->socket.io_irq = 0;
557 s->ops->set_socket(s, &s->socket);
558 s->lock_count++;
559 mutex_unlock(&s->ops_mutex);
560
561 /* Set up CIS configuration registers */
562 base = c->ConfigBase = req->ConfigBase;
563 c->CardValues = req->Present;
564 if (req->Present & PRESENT_COPY) {
565 c->Copy = req->Copy;
566 pcmcia_write_cis_mem(s, 1, (base + CISREG_SCR)>>1, 1, &c->Copy);
567 }
568 if (req->Present & PRESENT_OPTION) {
569 if (s->functions == 1) {
570 c->Option = req->ConfigIndex & COR_CONFIG_MASK;
571 } else {
572 c->Option = req->ConfigIndex & COR_MFC_CONFIG_MASK;
573 c->Option |= COR_FUNC_ENA|COR_IREQ_ENA;
574 if (req->Present & PRESENT_IOBASE_0)
575 c->Option |= COR_ADDR_DECODE;
576 }
577 if (c->state & CONFIG_IRQ_REQ)
578 if (!(c->irq.Attributes & IRQ_FORCED_PULSE))
579 c->Option |= COR_LEVEL_REQ;
580 pcmcia_write_cis_mem(s, 1, (base + CISREG_COR)>>1, 1, &c->Option);
581 mdelay(40);
582 }
583 if (req->Present & PRESENT_STATUS) {
584 c->Status = req->Status;
585 pcmcia_write_cis_mem(s, 1, (base + CISREG_CCSR)>>1, 1, &c->Status);
586 }
587 if (req->Present & PRESENT_PIN_REPLACE) {
588 c->Pin = req->Pin;
589 pcmcia_write_cis_mem(s, 1, (base + CISREG_PRR)>>1, 1, &c->Pin);
590 }
591 if (req->Present & PRESENT_EXT_STATUS) {
592 c->ExtStatus = req->ExtStatus;
593 pcmcia_write_cis_mem(s, 1, (base + CISREG_ESR)>>1, 1, &c->ExtStatus);
594 }
595 if (req->Present & PRESENT_IOBASE_0) {
596 u_char b = c->io.BasePort1 & 0xff;
597 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_0)>>1, 1, &b);
598 b = (c->io.BasePort1 >> 8) & 0xff;
599 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOBASE_1)>>1, 1, &b);
600 }
601 if (req->Present & PRESENT_IOSIZE) {
602 u_char b = c->io.NumPorts1 + c->io.NumPorts2 - 1;
603 pcmcia_write_cis_mem(s, 1, (base + CISREG_IOSIZE)>>1, 1, &b);
604 }
605
606 /* Configure I/O windows */
607 if (c->state & CONFIG_IO_REQ) {
608 mutex_lock(&s->ops_mutex);
609 iomap.speed = io_speed;
610 for (i = 0; i < MAX_IO_WIN; i++)
611 if (s->io[i].res) {
612 iomap.map = i;
613 iomap.flags = MAP_ACTIVE;
614 switch (s->io[i].res->flags & IO_DATA_PATH_WIDTH) {
615 case IO_DATA_PATH_WIDTH_16:
616 iomap.flags |= MAP_16BIT; break;
617 case IO_DATA_PATH_WIDTH_AUTO:
618 iomap.flags |= MAP_AUTOSZ; break;
619 default:
620 break;
621 }
622 iomap.start = s->io[i].res->start;
623 iomap.stop = s->io[i].res->end;
624 s->ops->set_io_map(s, &iomap);
625 s->io[i].Config++;
626 }
627 mutex_unlock(&s->ops_mutex);
628 }
629
630 c->state |= CONFIG_LOCKED;
631 p_dev->_locked = 1;
632 return 0;
633 } /* pcmcia_request_configuration */
634 EXPORT_SYMBOL(pcmcia_request_configuration);
635
636
637 /** pcmcia_request_io
638 *
639 * Request_io() reserves ranges of port addresses for a socket.
640 * I have not implemented range sharing or alias addressing.
641 */
642 int pcmcia_request_io(struct pcmcia_device *p_dev, io_req_t *req)
643 {
644 struct pcmcia_socket *s = p_dev->socket;
645 config_t *c;
646 int ret = -EINVAL;
647
648 mutex_lock(&s->ops_mutex);
649
650 if (!(s->state & SOCKET_PRESENT)) {
651 dev_dbg(&s->dev, "No card present\n");
652 goto out;
653 }
654
655 if (!req)
656 goto out;
657
658 c = p_dev->function_config;
659 if (c->state & CONFIG_LOCKED) {
660 dev_dbg(&s->dev, "Configuration is locked\n");
661 goto out;
662 }
663 if (c->state & CONFIG_IO_REQ) {
664 dev_dbg(&s->dev, "IO already configured\n");
665 goto out;
666 }
667 if (req->Attributes1 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS)) {
668 dev_dbg(&s->dev, "bad attribute setting for IO region 1\n");
669 goto out;
670 }
671 if ((req->NumPorts2 > 0) &&
672 (req->Attributes2 & (IO_SHARED | IO_FORCE_ALIAS_ACCESS))) {
673 dev_dbg(&s->dev, "bad attribute setting for IO region 2\n");
674 goto out;
675 }
676
677 dev_dbg(&s->dev, "trying to allocate resource 1\n");
678 ret = alloc_io_space(s, req->Attributes1, &req->BasePort1,
679 req->NumPorts1, req->IOAddrLines);
680 if (ret) {
681 dev_dbg(&s->dev, "allocation of resource 1 failed\n");
682 goto out;
683 }
684
685 if (req->NumPorts2) {
686 dev_dbg(&s->dev, "trying to allocate resource 2\n");
687 ret = alloc_io_space(s, req->Attributes2, &req->BasePort2,
688 req->NumPorts2, req->IOAddrLines);
689 if (ret) {
690 dev_dbg(&s->dev, "allocation of resource 2 failed\n");
691 release_io_space(s, req->BasePort1, req->NumPorts1);
692 goto out;
693 }
694 }
695
696 c->io = *req;
697 c->state |= CONFIG_IO_REQ;
698 p_dev->_io = 1;
699 dev_dbg(&s->dev, "allocating resources succeeded: %d\n", ret);
700
701 out:
702 mutex_unlock(&s->ops_mutex);
703
704 return ret;
705 } /* pcmcia_request_io */
706 EXPORT_SYMBOL(pcmcia_request_io);
707
708
709 /** pcmcia_request_irq
710 *
711 * Request_irq() reserves an irq for this client.
712 *
713 * Also, since Linux only reserves irq's when they are actually
714 * hooked, we don't guarantee that an irq will still be available
715 * when the configuration is locked. Now that I think about it,
716 * there might be a way to fix this using a dummy handler.
717 */
718
719 #ifdef CONFIG_PCMCIA_PROBE
720 static irqreturn_t test_action(int cpl, void *dev_id)
721 {
722 return IRQ_NONE;
723 }
724 #endif
725
726 int pcmcia_request_irq(struct pcmcia_device *p_dev, irq_req_t *req)
727 {
728 struct pcmcia_socket *s = p_dev->socket;
729 config_t *c;
730 int ret = -EINVAL, irq = 0;
731 int type;
732
733 mutex_lock(&s->ops_mutex);
734
735 if (!(s->state & SOCKET_PRESENT)) {
736 dev_dbg(&s->dev, "No card present\n");
737 goto out;
738 }
739 c = p_dev->function_config;
740 if (c->state & CONFIG_LOCKED) {
741 dev_dbg(&s->dev, "Configuration is locked\n");
742 goto out;
743 }
744 if (c->state & CONFIG_IRQ_REQ) {
745 dev_dbg(&s->dev, "IRQ already configured\n");
746 goto out;
747 }
748
749 /* Decide what type of interrupt we are registering */
750 type = 0;
751 if (s->functions > 1) /* All of this ought to be handled higher up */
752 type = IRQF_SHARED;
753 else if (req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)
754 type = IRQF_SHARED;
755 else
756 printk(KERN_WARNING "pcmcia: Driver needs updating to support IRQ sharing.\n");
757
758 /* If the interrupt is already assigned, it must be the same */
759 if (s->irq.AssignedIRQ != 0)
760 irq = s->irq.AssignedIRQ;
761
762 #ifdef CONFIG_PCMCIA_PROBE
763 if (!irq) {
764 int try;
765 u32 mask = s->irq_mask;
766 void *data = p_dev; /* something unique to this device */
767
768 for (try = 0; try < 64; try++) {
769 irq = try % 32;
770
771 /* marked as available by driver, and not blocked by userspace? */
772 if (!((mask >> irq) & 1))
773 continue;
774
775 /* avoid an IRQ which is already used by a PCMCIA card */
776 if ((try < 32) && pcmcia_used_irq[irq])
777 continue;
778
779 /* register the correct driver, if possible, of check whether
780 * registering a dummy handle works, i.e. if the IRQ isn't
781 * marked as used by the kernel resource management core */
782 ret = request_irq(irq,
783 (req->Handler) ? req->Handler : test_action,
784 type,
785 p_dev->devname,
786 (req->Handler) ? p_dev->priv : data);
787 if (!ret) {
788 if (!req->Handler)
789 free_irq(irq, data);
790 break;
791 }
792 }
793 }
794 #endif
795 /* only assign PCI irq if no IRQ already assigned */
796 if (ret && !s->irq.AssignedIRQ) {
797 if (!s->pci_irq) {
798 dev_printk(KERN_INFO, &s->dev, "no IRQ found\n");
799 goto out;
800 }
801 type = IRQF_SHARED;
802 irq = s->pci_irq;
803 }
804
805 if (ret && req->Handler) {
806 ret = request_irq(irq, req->Handler, type,
807 p_dev->devname, p_dev->priv);
808 if (ret) {
809 dev_printk(KERN_INFO, &s->dev,
810 "request_irq() failed\n");
811 goto out;
812 }
813 }
814
815 /* Make sure the fact the request type was overridden is passed back */
816 if (type == IRQF_SHARED && !(req->Attributes & IRQ_TYPE_DYNAMIC_SHARING)) {
817 req->Attributes |= IRQ_TYPE_DYNAMIC_SHARING;
818 dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: "
819 "request for exclusive IRQ could not be fulfilled.\n");
820 dev_printk(KERN_WARNING, &p_dev->dev, "pcmcia: the driver "
821 "needs updating to supported shared IRQ lines.\n");
822 }
823 c->irq.Attributes = req->Attributes;
824 s->irq.AssignedIRQ = req->AssignedIRQ = irq;
825 s->irq.Config++;
826
827 c->state |= CONFIG_IRQ_REQ;
828 p_dev->_irq = 1;
829
830 #ifdef CONFIG_PCMCIA_PROBE
831 pcmcia_used_irq[irq]++;
832 #endif
833
834 ret = 0;
835 out:
836 mutex_unlock(&s->ops_mutex);
837 return ret;
838 } /* pcmcia_request_irq */
839 EXPORT_SYMBOL(pcmcia_request_irq);
840
841
842 /** pcmcia_request_window
843 *
844 * Request_window() establishes a mapping between card memory space
845 * and system memory space.
846 */
847 int pcmcia_request_window(struct pcmcia_device *p_dev, win_req_t *req, window_handle_t *wh)
848 {
849 struct pcmcia_socket *s = p_dev->socket;
850 pccard_mem_map *win;
851 u_long align;
852 int w;
853
854 if (!(s->state & SOCKET_PRESENT)) {
855 dev_dbg(&s->dev, "No card present\n");
856 return -ENODEV;
857 }
858 if (req->Attributes & (WIN_PAGED | WIN_SHARED)) {
859 dev_dbg(&s->dev, "bad attribute setting for iomem region\n");
860 return -EINVAL;
861 }
862
863 /* Window size defaults to smallest available */
864 if (req->Size == 0)
865 req->Size = s->map_size;
866 align = (((s->features & SS_CAP_MEM_ALIGN) ||
867 (req->Attributes & WIN_STRICT_ALIGN)) ?
868 req->Size : s->map_size);
869 if (req->Size & (s->map_size-1)) {
870 dev_dbg(&s->dev, "invalid map size\n");
871 return -EINVAL;
872 }
873 if ((req->Base && (s->features & SS_CAP_STATIC_MAP)) ||
874 (req->Base & (align-1))) {
875 dev_dbg(&s->dev, "invalid base address\n");
876 return -EINVAL;
877 }
878 if (req->Base)
879 align = 0;
880
881 /* Allocate system memory window */
882 for (w = 0; w < MAX_WIN; w++)
883 if (!(s->state & SOCKET_WIN_REQ(w)))
884 break;
885 if (w == MAX_WIN) {
886 dev_dbg(&s->dev, "all windows are used already\n");
887 return -EINVAL;
888 }
889
890 mutex_lock(&s->ops_mutex);
891 win = &s->win[w];
892
893 if (!(s->features & SS_CAP_STATIC_MAP)) {
894 win->res = pcmcia_find_mem_region(req->Base, req->Size, align,
895 (req->Attributes & WIN_MAP_BELOW_1MB), s);
896 if (!win->res) {
897 dev_dbg(&s->dev, "allocating mem region failed\n");
898 mutex_unlock(&s->ops_mutex);
899 return -EINVAL;
900 }
901 }
902 p_dev->_win |= CLIENT_WIN_REQ(w);
903
904 /* Configure the socket controller */
905 win->map = w+1;
906 win->flags = 0;
907 win->speed = req->AccessSpeed;
908 if (req->Attributes & WIN_MEMORY_TYPE)
909 win->flags |= MAP_ATTRIB;
910 if (req->Attributes & WIN_ENABLE)
911 win->flags |= MAP_ACTIVE;
912 if (req->Attributes & WIN_DATA_WIDTH_16)
913 win->flags |= MAP_16BIT;
914 if (req->Attributes & WIN_USE_WAIT)
915 win->flags |= MAP_USE_WAIT;
916 win->card_start = 0;
917
918 if (s->ops->set_mem_map(s, win) != 0) {
919 dev_dbg(&s->dev, "failed to set memory mapping\n");
920 mutex_unlock(&s->ops_mutex);
921 return -EIO;
922 }
923 s->state |= SOCKET_WIN_REQ(w);
924
925 /* Return window handle */
926 if (s->features & SS_CAP_STATIC_MAP)
927 req->Base = win->static_start;
928 else
929 req->Base = win->res->start;
930
931 mutex_unlock(&s->ops_mutex);
932 *wh = w + 1;
933
934 return 0;
935 } /* pcmcia_request_window */
936 EXPORT_SYMBOL(pcmcia_request_window);
937
938 void pcmcia_disable_device(struct pcmcia_device *p_dev)
939 {
940 pcmcia_release_configuration(p_dev);
941 pcmcia_release_io(p_dev, &p_dev->io);
942 pcmcia_release_irq(p_dev, &p_dev->irq);
943 if (p_dev->win)
944 pcmcia_release_window(p_dev, p_dev->win);
945 }
946 EXPORT_SYMBOL(pcmcia_disable_device);
947
948
949 struct pcmcia_cfg_mem {
950 struct pcmcia_device *p_dev;
951 void *priv_data;
952 int (*conf_check) (struct pcmcia_device *p_dev,
953 cistpl_cftable_entry_t *cfg,
954 cistpl_cftable_entry_t *dflt,
955 unsigned int vcc,
956 void *priv_data);
957 cisparse_t parse;
958 cistpl_cftable_entry_t dflt;
959 };
960
961 /**
962 * pcmcia_do_loop_config() - internal helper for pcmcia_loop_config()
963 *
964 * pcmcia_do_loop_config() is the internal callback for the call from
965 * pcmcia_loop_config() to pccard_loop_tuple(). Data is transferred
966 * by a struct pcmcia_cfg_mem.
967 */
968 static int pcmcia_do_loop_config(tuple_t *tuple, cisparse_t *parse, void *priv)
969 {
970 cistpl_cftable_entry_t *cfg = &parse->cftable_entry;
971 struct pcmcia_cfg_mem *cfg_mem = priv;
972
973 /* default values */
974 cfg_mem->p_dev->conf.ConfigIndex = cfg->index;
975 if (cfg->flags & CISTPL_CFTABLE_DEFAULT)
976 cfg_mem->dflt = *cfg;
977
978 return cfg_mem->conf_check(cfg_mem->p_dev, cfg, &cfg_mem->dflt,
979 cfg_mem->p_dev->socket->socket.Vcc,
980 cfg_mem->priv_data);
981 }
982
983 /**
984 * pcmcia_loop_config() - loop over configuration options
985 * @p_dev: the struct pcmcia_device which we need to loop for.
986 * @conf_check: function to call for each configuration option.
987 * It gets passed the struct pcmcia_device, the CIS data
988 * describing the configuration option, and private data
989 * being passed to pcmcia_loop_config()
990 * @priv_data: private data to be passed to the conf_check function.
991 *
992 * pcmcia_loop_config() loops over all configuration options, and calls
993 * the driver-specific conf_check() for each one, checking whether
994 * it is a valid one. Returns 0 on success or errorcode otherwise.
995 */
996 int pcmcia_loop_config(struct pcmcia_device *p_dev,
997 int (*conf_check) (struct pcmcia_device *p_dev,
998 cistpl_cftable_entry_t *cfg,
999 cistpl_cftable_entry_t *dflt,
1000 unsigned int vcc,
1001 void *priv_data),
1002 void *priv_data)
1003 {
1004 struct pcmcia_cfg_mem *cfg_mem;
1005 int ret;
1006
1007 cfg_mem = kzalloc(sizeof(struct pcmcia_cfg_mem), GFP_KERNEL);
1008 if (cfg_mem == NULL)
1009 return -ENOMEM;
1010
1011 cfg_mem->p_dev = p_dev;
1012 cfg_mem->conf_check = conf_check;
1013 cfg_mem->priv_data = priv_data;
1014
1015 ret = pccard_loop_tuple(p_dev->socket, p_dev->func,
1016 CISTPL_CFTABLE_ENTRY, &cfg_mem->parse,
1017 cfg_mem, pcmcia_do_loop_config);
1018
1019 kfree(cfg_mem);
1020 return ret;
1021 }
1022 EXPORT_SYMBOL(pcmcia_loop_config);
1023
1024
1025 struct pcmcia_loop_mem {
1026 struct pcmcia_device *p_dev;
1027 void *priv_data;
1028 int (*loop_tuple) (struct pcmcia_device *p_dev,
1029 tuple_t *tuple,
1030 void *priv_data);
1031 };
1032
1033 /**
1034 * pcmcia_do_loop_tuple() - internal helper for pcmcia_loop_config()
1035 *
1036 * pcmcia_do_loop_tuple() is the internal callback for the call from
1037 * pcmcia_loop_tuple() to pccard_loop_tuple(). Data is transferred
1038 * by a struct pcmcia_cfg_mem.
1039 */
1040 static int pcmcia_do_loop_tuple(tuple_t *tuple, cisparse_t *parse, void *priv)
1041 {
1042 struct pcmcia_loop_mem *loop = priv;
1043
1044 return loop->loop_tuple(loop->p_dev, tuple, loop->priv_data);
1045 };
1046
1047 /**
1048 * pcmcia_loop_tuple() - loop over tuples in the CIS
1049 * @p_dev: the struct pcmcia_device which we need to loop for.
1050 * @code: which CIS code shall we look for?
1051 * @priv_data: private data to be passed to the loop_tuple function.
1052 * @loop_tuple: function to call for each CIS entry of type @function. IT
1053 * gets passed the raw tuple and @priv_data.
1054 *
1055 * pcmcia_loop_tuple() loops over all CIS entries of type @function, and
1056 * calls the @loop_tuple function for each entry. If the call to @loop_tuple
1057 * returns 0, the loop exits. Returns 0 on success or errorcode otherwise.
1058 */
1059 int pcmcia_loop_tuple(struct pcmcia_device *p_dev, cisdata_t code,
1060 int (*loop_tuple) (struct pcmcia_device *p_dev,
1061 tuple_t *tuple,
1062 void *priv_data),
1063 void *priv_data)
1064 {
1065 struct pcmcia_loop_mem loop = {
1066 .p_dev = p_dev,
1067 .loop_tuple = loop_tuple,
1068 .priv_data = priv_data};
1069
1070 return pccard_loop_tuple(p_dev->socket, p_dev->func, code, NULL,
1071 &loop, pcmcia_do_loop_tuple);
1072 }
1073 EXPORT_SYMBOL(pcmcia_loop_tuple);
1074
1075
1076 struct pcmcia_loop_get {
1077 size_t len;
1078 cisdata_t **buf;
1079 };
1080
1081 /**
1082 * pcmcia_do_get_tuple() - internal helper for pcmcia_get_tuple()
1083 *
1084 * pcmcia_do_get_tuple() is the internal callback for the call from
1085 * pcmcia_get_tuple() to pcmcia_loop_tuple(). As we're only interested in
1086 * the first tuple, return 0 unconditionally. Create a memory buffer large
1087 * enough to hold the content of the tuple, and fill it with the tuple data.
1088 * The caller is responsible to free the buffer.
1089 */
1090 static int pcmcia_do_get_tuple(struct pcmcia_device *p_dev, tuple_t *tuple,
1091 void *priv)
1092 {
1093 struct pcmcia_loop_get *get = priv;
1094
1095 *get->buf = kzalloc(tuple->TupleDataLen, GFP_KERNEL);
1096 if (*get->buf) {
1097 get->len = tuple->TupleDataLen;
1098 memcpy(*get->buf, tuple->TupleData, tuple->TupleDataLen);
1099 } else
1100 dev_dbg(&p_dev->dev, "do_get_tuple: out of memory\n");
1101 return 0;
1102 }
1103
1104 /**
1105 * pcmcia_get_tuple() - get first tuple from CIS
1106 * @p_dev: the struct pcmcia_device which we need to loop for.
1107 * @code: which CIS code shall we look for?
1108 * @buf: pointer to store the buffer to.
1109 *
1110 * pcmcia_get_tuple() gets the content of the first CIS entry of type @code.
1111 * It returns the buffer length (or zero). The caller is responsible to free
1112 * the buffer passed in @buf.
1113 */
1114 size_t pcmcia_get_tuple(struct pcmcia_device *p_dev, cisdata_t code,
1115 unsigned char **buf)
1116 {
1117 struct pcmcia_loop_get get = {
1118 .len = 0,
1119 .buf = buf,
1120 };
1121
1122 *get.buf = NULL;
1123 pcmcia_loop_tuple(p_dev, code, pcmcia_do_get_tuple, &get);
1124
1125 return get.len;
1126 }
1127 EXPORT_SYMBOL(pcmcia_get_tuple);
1128
1129
1130 /**
1131 * pcmcia_do_get_mac() - internal helper for pcmcia_get_mac_from_cis()
1132 *
1133 * pcmcia_do_get_mac() is the internal callback for the call from
1134 * pcmcia_get_mac_from_cis() to pcmcia_loop_tuple(). We check whether the
1135 * tuple contains a proper LAN_NODE_ID of length 6, and copy the data
1136 * to struct net_device->dev_addr[i].
1137 */
1138 static int pcmcia_do_get_mac(struct pcmcia_device *p_dev, tuple_t *tuple,
1139 void *priv)
1140 {
1141 struct net_device *dev = priv;
1142 int i;
1143
1144 if (tuple->TupleData[0] != CISTPL_FUNCE_LAN_NODE_ID)
1145 return -EINVAL;
1146 if (tuple->TupleDataLen < ETH_ALEN + 2) {
1147 dev_warn(&p_dev->dev, "Invalid CIS tuple length for "
1148 "LAN_NODE_ID\n");
1149 return -EINVAL;
1150 }
1151
1152 if (tuple->TupleData[1] != ETH_ALEN) {
1153 dev_warn(&p_dev->dev, "Invalid header for LAN_NODE_ID\n");
1154 return -EINVAL;
1155 }
1156 for (i = 0; i < 6; i++)
1157 dev->dev_addr[i] = tuple->TupleData[i+2];
1158 return 0;
1159 }
1160
1161 /**
1162 * pcmcia_get_mac_from_cis() - read out MAC address from CISTPL_FUNCE
1163 * @p_dev: the struct pcmcia_device for which we want the address.
1164 * @dev: a properly prepared struct net_device to store the info to.
1165 *
1166 * pcmcia_get_mac_from_cis() reads out the hardware MAC address from
1167 * CISTPL_FUNCE and stores it into struct net_device *dev->dev_addr which
1168 * must be set up properly by the driver (see examples!).
1169 */
1170 int pcmcia_get_mac_from_cis(struct pcmcia_device *p_dev, struct net_device *dev)
1171 {
1172 return pcmcia_loop_tuple(p_dev, CISTPL_FUNCE, pcmcia_do_get_mac, dev);
1173 }
1174 EXPORT_SYMBOL(pcmcia_get_mac_from_cis);
1175
Linus' kernel tree