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davinci: explain CLOCK_TICK_RATE of 27MHz in include/mach/timex.h
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / pcmcia / rsrc_nonstatic.c
blob9b0dc433a8c3a6953f223dd6160adbdc22db5b20
1 /*
2 * rsrc_nonstatic.c -- Resource management routines for !SS_CAP_STATIC_MAP sockets
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 as
6 * published by the Free Software Foundation.
7 *
8 * The initial developer of the original code is David A. Hinds
9 * <dahinds@users.sourceforge.net>. Portions created by David A. Hinds
10 * are Copyright (C) 1999 David A. Hinds. All Rights Reserved.
11 *
12 * (C) 1999 David A. Hinds
13 */
14
15 #include <linux/module.h>
16 #include <linux/moduleparam.h>
17 #include <linux/init.h>
18 #include <linux/interrupt.h>
19 #include <linux/kernel.h>
20 #include <linux/errno.h>
21 #include <linux/types.h>
22 #include <linux/slab.h>
23 #include <linux/ioport.h>
24 #include <linux/timer.h>
25 #include <linux/pci.h>
26 #include <linux/device.h>
27 #include <linux/io.h>
28
29 #include <asm/irq.h>
30
31 #include <pcmcia/cs_types.h>
32 #include <pcmcia/ss.h>
33 #include <pcmcia/cs.h>
34 #include <pcmcia/cistpl.h>
35 #include "cs_internal.h"
36
37 MODULE_AUTHOR("David A. Hinds, Dominik Brodowski");
38 MODULE_LICENSE("GPL");
39
40 /* Parameters that can be set with 'insmod' */
41
42 #define INT_MODULE_PARM(n, v) static int n = v; module_param(n, int, 0444)
43
44 INT_MODULE_PARM(probe_mem, 1); /* memory probe? */
45 #ifdef CONFIG_PCMCIA_PROBE
46 INT_MODULE_PARM(probe_io, 1); /* IO port probe? */
47 INT_MODULE_PARM(mem_limit, 0x10000);
48 #endif
49
50 /* for io_db and mem_db */
51 struct resource_map {
52 u_long base, num;
53 struct resource_map *next;
54 };
55
56 struct socket_data {
57 struct resource_map mem_db;
58 struct resource_map io_db;
59 unsigned int rsrc_mem_probe;
60 };
61
62 static DEFINE_MUTEX(rsrc_mutex);
63 #define MEM_PROBE_LOW (1 << 0)
64 #define MEM_PROBE_HIGH (1 << 1)
65
66
67 /*======================================================================
68
69 Linux resource management extensions
70
71 ======================================================================*/
72
73 static struct resource *
74 make_resource(resource_size_t b, resource_size_t n, int flags, const char *name)
75 {
76 struct resource *res = kzalloc(sizeof(*res), GFP_KERNEL);
77
78 if (res) {
79 res->name = name;
80 res->start = b;
81 res->end = b + n - 1;
82 res->flags = flags;
83 }
84 return res;
85 }
86
87 static struct resource *
88 claim_region(struct pcmcia_socket *s, resource_size_t base,
89 resource_size_t size, int type, char *name)
90 {
91 struct resource *res, *parent;
92
93 parent = type & IORESOURCE_MEM ? &iomem_resource : &ioport_resource;
94 res = make_resource(base, size, type | IORESOURCE_BUSY, name);
95
96 if (res) {
97 #ifdef CONFIG_PCI
98 if (s && s->cb_dev)
99 parent = pci_find_parent_resource(s->cb_dev, res);
100 #endif
101 if (!parent || request_resource(parent, res)) {
102 kfree(res);
103 res = NULL;
104 }
105 }
106 return res;
107 }
108
109 static void free_region(struct resource *res)
110 {
111 if (res) {
112 release_resource(res);
113 kfree(res);
114 }
115 }
116
117 /*======================================================================
118
119 These manage the internal databases of available resources.
120
121 ======================================================================*/
122
123 static int add_interval(struct resource_map *map, u_long base, u_long num)
124 {
125 struct resource_map *p, *q;
126
127 for (p = map; ; p = p->next) {
128 if ((p != map) && (p->base+p->num-1 >= base))
129 return -1;
130 if ((p->next == map) || (p->next->base > base+num-1))
131 break;
132 }
133 q = kmalloc(sizeof(struct resource_map), GFP_KERNEL);
134 if (!q) {
135 printk(KERN_WARNING "out of memory to update resources\n");
136 return -ENOMEM;
137 }
138 q->base = base; q->num = num;
139 q->next = p->next; p->next = q;
140 return 0;
141 }
142
143 /*====================================================================*/
144
145 static int sub_interval(struct resource_map *map, u_long base, u_long num)
146 {
147 struct resource_map *p, *q;
148
149 for (p = map; ; p = q) {
150 q = p->next;
151 if (q == map)
152 break;
153 if ((q->base+q->num > base) && (base+num > q->base)) {
154 if (q->base >= base) {
155 if (q->base+q->num <= base+num) {
156 /* Delete whole block */
157 p->next = q->next;
158 kfree(q);
159 /* don't advance the pointer yet */
160 q = p;
161 } else {
162 /* Cut off bit from the front */
163 q->num = q->base + q->num - base - num;
164 q->base = base + num;
165 }
166 } else if (q->base+q->num <= base+num) {
167 /* Cut off bit from the end */
168 q->num = base - q->base;
169 } else {
170 /* Split the block into two pieces */
171 p = kmalloc(sizeof(struct resource_map),
172 GFP_KERNEL);
173 if (!p) {
174 printk(KERN_WARNING "out of memory to update resources\n");
175 return -ENOMEM;
176 }
177 p->base = base+num;
178 p->num = q->base+q->num - p->base;
179 q->num = base - q->base;
180 p->next = q->next ; q->next = p;
181 }
182 }
183 }
184 return 0;
185 }
186
187 /*======================================================================
188
189 These routines examine a region of IO or memory addresses to
190 determine what ranges might be genuinely available.
191
192 ======================================================================*/
193
194 #ifdef CONFIG_PCMCIA_PROBE
195 static void do_io_probe(struct pcmcia_socket *s, unsigned int base,
196 unsigned int num)
197 {
198 struct resource *res;
199 struct socket_data *s_data = s->resource_data;
200 unsigned int i, j, bad;
201 int any;
202 u_char *b, hole, most;
203
204 dev_printk(KERN_INFO, &s->dev, "cs: IO port probe %#x-%#x:",
205 base, base+num-1);
206
207 /* First, what does a floating port look like? */
208 b = kzalloc(256, GFP_KERNEL);
209 if (!b) {
210 printk("\n");
211 dev_printk(KERN_ERR, &s->dev,
212 "do_io_probe: unable to kmalloc 256 bytes");
213 return;
214 }
215 for (i = base, most = 0; i < base+num; i += 8) {
216 res = claim_region(NULL, i, 8, IORESOURCE_IO, "PCMCIA ioprobe");
217 if (!res)
218 continue;
219 hole = inb(i);
220 for (j = 1; j < 8; j++)
221 if (inb(i+j) != hole)
222 break;
223 free_region(res);
224 if ((j == 8) && (++b[hole] > b[most]))
225 most = hole;
226 if (b[most] == 127)
227 break;
228 }
229 kfree(b);
230
231 bad = any = 0;
232 for (i = base; i < base+num; i += 8) {
233 res = claim_region(NULL, i, 8, IORESOURCE_IO, "PCMCIA ioprobe");
234 if (!res)
235 continue;
236 for (j = 0; j < 8; j++)
237 if (inb(i+j) != most)
238 break;
239 free_region(res);
240 if (j < 8) {
241 if (!any)
242 printk(" excluding");
243 if (!bad)
244 bad = any = i;
245 } else {
246 if (bad) {
247 sub_interval(&s_data->io_db, bad, i-bad);
248 printk(" %#x-%#x", bad, i-1);
249 bad = 0;
250 }
251 }
252 }
253 if (bad) {
254 if ((num > 16) && (bad == base) && (i == base+num)) {
255 printk(" nothing: probe failed.\n");
256 return;
257 } else {
258 sub_interval(&s_data->io_db, bad, i-bad);
259 printk(" %#x-%#x", bad, i-1);
260 }
261 }
262
263 printk(any ? "\n" : " clean.\n");
264 }
265 #endif
266
267 /*======================================================================
268
269 This is tricky... when we set up CIS memory, we try to validate
270 the memory window space allocations.
271
272 ======================================================================*/
273
274 /* Validation function for cards with a valid CIS */
275 static int readable(struct pcmcia_socket *s, struct resource *res,
276 unsigned int *count)
277 {
278 int ret = -1;
279
280 s->cis_mem.res = res;
281 s->cis_virt = ioremap(res->start, s->map_size);
282 if (s->cis_virt) {
283 ret = pccard_validate_cis(s, count);
284 /* invalidate mapping and CIS cache */
285 iounmap(s->cis_virt);
286 s->cis_virt = NULL;
287 destroy_cis_cache(s);
288 }
289 s->cis_mem.res = NULL;
290 if ((ret != 0) || (*count == 0))
291 return 0;
292 return 1;
293 }
294
295 /* Validation function for simple memory cards */
296 static int checksum(struct pcmcia_socket *s, struct resource *res)
297 {
298 pccard_mem_map map;
299 int i, a = 0, b = -1, d;
300 void __iomem *virt;
301
302 virt = ioremap(res->start, s->map_size);
303 if (virt) {
304 map.map = 0;
305 map.flags = MAP_ACTIVE;
306 map.speed = 0;
307 map.res = res;
308 map.card_start = 0;
309 s->ops->set_mem_map(s, &map);
310
311 /* Don't bother checking every word... */
312 for (i = 0; i < s->map_size; i += 44) {
313 d = readl(virt+i);
314 a += d;
315 b &= d;
316 }
317
318 map.flags = 0;
319 s->ops->set_mem_map(s, &map);
320
321 iounmap(virt);
322 }
323
324 return (b == -1) ? -1 : (a>>1);
325 }
326
327 static int
328 cis_readable(struct pcmcia_socket *s, unsigned long base, unsigned long size)
329 {
330 struct resource *res1, *res2;
331 unsigned int info1, info2;
332 int ret = 0;
333
334 res1 = claim_region(s, base, size/2, IORESOURCE_MEM, "PCMCIA memprobe");
335 res2 = claim_region(s, base + size/2, size/2, IORESOURCE_MEM,
336 "PCMCIA memprobe");
337
338 if (res1 && res2) {
339 ret = readable(s, res1, &info1);
340 ret += readable(s, res2, &info2);
341 }
342
343 free_region(res2);
344 free_region(res1);
345
346 return (ret == 2) && (info1 == info2);
347 }
348
349 static int
350 checksum_match(struct pcmcia_socket *s, unsigned long base, unsigned long size)
351 {
352 struct resource *res1, *res2;
353 int a = -1, b = -1;
354
355 res1 = claim_region(s, base, size/2, IORESOURCE_MEM, "PCMCIA memprobe");
356 res2 = claim_region(s, base + size/2, size/2, IORESOURCE_MEM,
357 "PCMCIA memprobe");
358
359 if (res1 && res2) {
360 a = checksum(s, res1);
361 b = checksum(s, res2);
362 }
363
364 free_region(res2);
365 free_region(res1);
366
367 return (a == b) && (a >= 0);
368 }
369
370 /*======================================================================
371
372 The memory probe. If the memory list includes a 64K-aligned block
373 below 1MB, we probe in 64K chunks, and as soon as we accumulate at
374 least mem_limit free space, we quit.
375
376 ======================================================================*/
377
378 static int do_mem_probe(u_long base, u_long num, struct pcmcia_socket *s)
379 {
380 struct socket_data *s_data = s->resource_data;
381 u_long i, j, bad, fail, step;
382
383 dev_printk(KERN_INFO, &s->dev, "cs: memory probe 0x%06lx-0x%06lx:",
384 base, base+num-1);
385 bad = fail = 0;
386 step = (num < 0x20000) ? 0x2000 : ((num>>4) & ~0x1fff);
387 /* don't allow too large steps */
388 if (step > 0x800000)
389 step = 0x800000;
390 /* cis_readable wants to map 2x map_size */
391 if (step < 2 * s->map_size)
392 step = 2 * s->map_size;
393 for (i = j = base; i < base+num; i = j + step) {
394 if (!fail) {
395 for (j = i; j < base+num; j += step) {
396 if (cis_readable(s, j, step))
397 break;
398 }
399 fail = ((i == base) && (j == base+num));
400 }
401 if (fail) {
402 for (j = i; j < base+num; j += 2*step)
403 if (checksum_match(s, j, step) &&
404 checksum_match(s, j + step, step))
405 break;
406 }
407 if (i != j) {
408 if (!bad)
409 printk(" excluding");
410 printk(" %#05lx-%#05lx", i, j-1);
411 sub_interval(&s_data->mem_db, i, j-i);
412 bad += j-i;
413 }
414 }
415 printk(bad ? "\n" : " clean.\n");
416 return num - bad;
417 }
418
419 #ifdef CONFIG_PCMCIA_PROBE
420
421 static u_long inv_probe(struct resource_map *m, struct pcmcia_socket *s)
422 {
423 struct socket_data *s_data = s->resource_data;
424 u_long ok;
425 if (m == &s_data->mem_db)
426 return 0;
427 ok = inv_probe(m->next, s);
428 if (ok) {
429 if (m->base >= 0x100000)
430 sub_interval(&s_data->mem_db, m->base, m->num);
431 return ok;
432 }
433 if (m->base < 0x100000)
434 return 0;
435 return do_mem_probe(m->base, m->num, s);
436 }
437
438 static int validate_mem(struct pcmcia_socket *s, unsigned int probe_mask)
439 {
440 struct resource_map *m, mm;
441 static unsigned char order[] = { 0xd0, 0xe0, 0xc0, 0xf0 };
442 unsigned long b, i, ok = 0;
443 struct socket_data *s_data = s->resource_data;
444
445 /* We do up to four passes through the list */
446 if (probe_mask & MEM_PROBE_HIGH) {
447 if (inv_probe(s_data->mem_db.next, s) > 0)
448 return 0;
449 dev_printk(KERN_NOTICE, &s->dev,
450 "cs: warning: no high memory space available!\n");
451 return -ENODEV;
452 }
453
454 for (m = s_data->mem_db.next; m != &s_data->mem_db; m = mm.next) {
455 mm = *m;
456 /* Only probe < 1 MB */
457 if (mm.base >= 0x100000)
458 continue;
459 if ((mm.base | mm.num) & 0xffff) {
460 ok += do_mem_probe(mm.base, mm.num, s);
461 continue;
462 }
463 /* Special probe for 64K-aligned block */
464 for (i = 0; i < 4; i++) {
465 b = order[i] << 12;
466 if ((b >= mm.base) && (b+0x10000 <= mm.base+mm.num)) {
467 if (ok >= mem_limit)
468 sub_interval(&s_data->mem_db, b, 0x10000);
469 else
470 ok += do_mem_probe(b, 0x10000, s);
471 }
472 }
473 }
474
475 if (ok > 0)
476 return 0;
477
478 return -ENODEV;
479 }
480
481 #else /* CONFIG_PCMCIA_PROBE */
482
483 static int validate_mem(struct pcmcia_socket *s, unsigned int probe_mask)
484 {
485 struct resource_map *m, mm;
486 struct socket_data *s_data = s->resource_data;
487 unsigned long ok = 0;
488
489 for (m = s_data->mem_db.next; m != &s_data->mem_db; m = mm.next) {
490 mm = *m;
491 ok += do_mem_probe(mm.base, mm.num, s);
492 }
493 if (ok > 0)
494 return 0;
495 return -ENODEV;
496 }
497
498 #endif /* CONFIG_PCMCIA_PROBE */
499
500
501 /*
502 * Locking note: Must be called with skt_mutex held!
503 */
504 static int pcmcia_nonstatic_validate_mem(struct pcmcia_socket *s)
505 {
506 struct socket_data *s_data = s->resource_data;
507 unsigned int probe_mask = MEM_PROBE_LOW;
508 int ret = 0;
509
510 if (!probe_mem)
511 return 0;
512
513 mutex_lock(&rsrc_mutex);
514
515 if (s->features & SS_CAP_PAGE_REGS)
516 probe_mask = MEM_PROBE_HIGH;
517
518 if (probe_mask & ~s_data->rsrc_mem_probe) {
519 if (s->state & SOCKET_PRESENT)
520 ret = validate_mem(s, probe_mask);
521 if (!ret)
522 s_data->rsrc_mem_probe |= probe_mask;
523 }
524
525 mutex_unlock(&rsrc_mutex);
526
527 return ret;
528 }
529
530 struct pcmcia_align_data {
531 unsigned long mask;
532 unsigned long offset;
533 struct resource_map *map;
534 };
535
536 static void
537 pcmcia_common_align(void *align_data, struct resource *res,
538 resource_size_t size, resource_size_t align)
539 {
540 struct pcmcia_align_data *data = align_data;
541 resource_size_t start;
542 /*
543 * Ensure that we have the correct start address
544 */
545 start = (res->start & ~data->mask) + data->offset;
546 if (start < res->start)
547 start += data->mask + 1;
548 res->start = start;
549 }
550
551 static void
552 pcmcia_align(void *align_data, struct resource *res, resource_size_t size,
553 resource_size_t align)
554 {
555 struct pcmcia_align_data *data = align_data;
556 struct resource_map *m;
557
558 pcmcia_common_align(data, res, size, align);
559
560 for (m = data->map->next; m != data->map; m = m->next) {
561 unsigned long start = m->base;
562 unsigned long end = m->base + m->num - 1;
563
564 /*
565 * If the lower resources are not available, try aligning
566 * to this entry of the resource database to see if it'll
567 * fit here.
568 */
569 if (res->start < start) {
570 res->start = start;
571 pcmcia_common_align(data, res, size, align);
572 }
573
574 /*
575 * If we're above the area which was passed in, there's
576 * no point proceeding.
577 */
578 if (res->start >= res->end)
579 break;
580
581 if ((res->start + size - 1) <= end)
582 break;
583 }
584
585 /*
586 * If we failed to find something suitable, ensure we fail.
587 */
588 if (m == data->map)
589 res->start = res->end;
590 }
591
592 /*
593 * Adjust an existing IO region allocation, but making sure that we don't
594 * encroach outside the resources which the user supplied.
595 */
596 static int nonstatic_adjust_io_region(struct resource *res, unsigned long r_start,
597 unsigned long r_end, struct pcmcia_socket *s)
598 {
599 struct resource_map *m;
600 struct socket_data *s_data = s->resource_data;
601 int ret = -ENOMEM;
602
603 mutex_lock(&rsrc_mutex);
604 for (m = s_data->io_db.next; m != &s_data->io_db; m = m->next) {
605 unsigned long start = m->base;
606 unsigned long end = m->base + m->num - 1;
607
608 if (start > r_start || r_end > end)
609 continue;
610
611 ret = adjust_resource(res, r_start, r_end - r_start + 1);
612 break;
613 }
614 mutex_unlock(&rsrc_mutex);
615
616 return ret;
617 }
618
619 /*======================================================================
620
621 These find ranges of I/O ports or memory addresses that are not
622 currently allocated by other devices.
623
624 The 'align' field should reflect the number of bits of address
625 that need to be preserved from the initial value of *base. It
626 should be a power of two, greater than or equal to 'num'. A value
627 of 0 means that all bits of *base are significant. *base should
628 also be strictly less than 'align'.
629
630 ======================================================================*/
631
632 static struct resource *nonstatic_find_io_region(unsigned long base, int num,
633 unsigned long align, struct pcmcia_socket *s)
634 {
635 struct resource *res = make_resource(0, num, IORESOURCE_IO, dev_name(&s->dev));
636 struct socket_data *s_data = s->resource_data;
637 struct pcmcia_align_data data;
638 unsigned long min = base;
639 int ret;
640
641 if (align == 0)
642 align = 0x10000;
643
644 data.mask = align - 1;
645 data.offset = base & data.mask;
646 data.map = &s_data->io_db;
647
648 mutex_lock(&rsrc_mutex);
649 #ifdef CONFIG_PCI
650 if (s->cb_dev) {
651 ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num, 1,
652 min, 0, pcmcia_align, &data);
653 } else
654 #endif
655 ret = allocate_resource(&ioport_resource, res, num, min, ~0UL,
656 1, pcmcia_align, &data);
657 mutex_unlock(&rsrc_mutex);
658
659 if (ret != 0) {
660 kfree(res);
661 res = NULL;
662 }
663 return res;
664 }
665
666 static struct resource *nonstatic_find_mem_region(u_long base, u_long num,
667 u_long align, int low, struct pcmcia_socket *s)
668 {
669 struct resource *res = make_resource(0, num, IORESOURCE_MEM, dev_name(&s->dev));
670 struct socket_data *s_data = s->resource_data;
671 struct pcmcia_align_data data;
672 unsigned long min, max;
673 int ret, i;
674
675 low = low || !(s->features & SS_CAP_PAGE_REGS);
676
677 data.mask = align - 1;
678 data.offset = base & data.mask;
679 data.map = &s_data->mem_db;
680
681 for (i = 0; i < 2; i++) {
682 if (low) {
683 max = 0x100000UL;
684 min = base < max ? base : 0;
685 } else {
686 max = ~0UL;
687 min = 0x100000UL + base;
688 }
689
690 mutex_lock(&rsrc_mutex);
691 #ifdef CONFIG_PCI
692 if (s->cb_dev) {
693 ret = pci_bus_alloc_resource(s->cb_dev->bus, res, num,
694 1, min, 0,
695 pcmcia_align, &data);
696 } else
697 #endif
698 ret = allocate_resource(&iomem_resource, res, num, min,
699 max, 1, pcmcia_align, &data);
700 mutex_unlock(&rsrc_mutex);
701 if (ret == 0 || low)
702 break;
703 low = 1;
704 }
705
706 if (ret != 0) {
707 kfree(res);
708 res = NULL;
709 }
710 return res;
711 }
712
713
714 static int adjust_memory(struct pcmcia_socket *s, unsigned int action, unsigned long start, unsigned long end)
715 {
716 struct socket_data *data = s->resource_data;
717 unsigned long size = end - start + 1;
718 int ret = 0;
719
720 if (end < start)
721 return -EINVAL;
722
723 mutex_lock(&rsrc_mutex);
724 switch (action) {
725 case ADD_MANAGED_RESOURCE:
726 ret = add_interval(&data->mem_db, start, size);
727 break;
728 case REMOVE_MANAGED_RESOURCE:
729 ret = sub_interval(&data->mem_db, start, size);
730 if (!ret) {
731 struct pcmcia_socket *socket;
732 down_read(&pcmcia_socket_list_rwsem);
733 list_for_each_entry(socket, &pcmcia_socket_list, socket_list)
734 release_cis_mem(socket);
735 up_read(&pcmcia_socket_list_rwsem);
736 }
737 break;
738 default:
739 ret = -EINVAL;
740 }
741 mutex_unlock(&rsrc_mutex);
742
743 return ret;
744 }
745
746
747 static int adjust_io(struct pcmcia_socket *s, unsigned int action, unsigned long start, unsigned long end)
748 {
749 struct socket_data *data = s->resource_data;
750 unsigned long size = end - start + 1;
751 int ret = 0;
752
753 if (end < start)
754 return -EINVAL;
755
756 if (end > IO_SPACE_LIMIT)
757 return -EINVAL;
758
759 mutex_lock(&rsrc_mutex);
760 switch (action) {
761 case ADD_MANAGED_RESOURCE:
762 if (add_interval(&data->io_db, start, size) != 0) {
763 ret = -EBUSY;
764 break;
765 }
766 #ifdef CONFIG_PCMCIA_PROBE
767 if (probe_io)
768 do_io_probe(s, start, size);
769 #endif
770 break;
771 case REMOVE_MANAGED_RESOURCE:
772 sub_interval(&data->io_db, start, size);
773 break;
774 default:
775 ret = -EINVAL;
776 break;
777 }
778 mutex_unlock(&rsrc_mutex);
779
780 return ret;
781 }
782
783
784 #ifdef CONFIG_PCI
785 static int nonstatic_autoadd_resources(struct pcmcia_socket *s)
786 {
787 struct resource *res;
788 int i, done = 0;
789
790 if (!s->cb_dev || !s->cb_dev->bus)
791 return -ENODEV;
792
793 #if defined(CONFIG_X86)
794 /* If this is the root bus, the risk of hitting
795 * some strange system devices which aren't protected
796 * by either ACPI resource tables or properly requested
797 * resources is too big. Therefore, don't do auto-adding
798 * of resources at the moment.
799 */
800 if (s->cb_dev->bus->number == 0)
801 return -EINVAL;
802 #endif
803
804 for (i = 0; i < PCI_BUS_NUM_RESOURCES; i++) {
805 res = s->cb_dev->bus->resource[i];
806 if (!res)
807 continue;
808
809 if (res->flags & IORESOURCE_IO) {
810 if (res == &ioport_resource)
811 continue;
812 dev_printk(KERN_INFO, &s->cb_dev->dev,
813 "pcmcia: parent PCI bridge I/O "
814 "window: 0x%llx - 0x%llx\n",
815 (unsigned long long)res->start,
816 (unsigned long long)res->end);
817 if (!adjust_io(s, ADD_MANAGED_RESOURCE, res->start, res->end))
818 done |= IORESOURCE_IO;
819
820 }
821
822 if (res->flags & IORESOURCE_MEM) {
823 if (res == &iomem_resource)
824 continue;
825 dev_printk(KERN_INFO, &s->cb_dev->dev,
826 "pcmcia: parent PCI bridge Memory "
827 "window: 0x%llx - 0x%llx\n",
828 (unsigned long long)res->start,
829 (unsigned long long)res->end);
830 if (!adjust_memory(s, ADD_MANAGED_RESOURCE, res->start, res->end))
831 done |= IORESOURCE_MEM;
832 }
833 }
834
835 /* if we got at least one of IO, and one of MEM, we can be glad and
836 * activate the PCMCIA subsystem */
837 if (done == (IORESOURCE_MEM | IORESOURCE_IO))
838 s->resource_setup_done = 1;
839
840 return 0;
841 }
842
843 #else
844
845 static inline int nonstatic_autoadd_resources(struct pcmcia_socket *s)
846 {
847 return -ENODEV;
848 }
849
850 #endif
851
852
853 static int nonstatic_init(struct pcmcia_socket *s)
854 {
855 struct socket_data *data;
856
857 data = kzalloc(sizeof(struct socket_data), GFP_KERNEL);
858 if (!data)
859 return -ENOMEM;
860
861 data->mem_db.next = &data->mem_db;
862 data->io_db.next = &data->io_db;
863
864 s->resource_data = (void *) data;
865
866 nonstatic_autoadd_resources(s);
867
868 return 0;
869 }
870
871 static void nonstatic_release_resource_db(struct pcmcia_socket *s)
872 {
873 struct socket_data *data = s->resource_data;
874 struct resource_map *p, *q;
875
876 mutex_lock(&rsrc_mutex);
877 for (p = data->mem_db.next; p != &data->mem_db; p = q) {
878 q = p->next;
879 kfree(p);
880 }
881 for (p = data->io_db.next; p != &data->io_db; p = q) {
882 q = p->next;
883 kfree(p);
884 }
885 mutex_unlock(&rsrc_mutex);
886 }
887
888
889 struct pccard_resource_ops pccard_nonstatic_ops = {
890 .validate_mem = pcmcia_nonstatic_validate_mem,
891 .adjust_io_region = nonstatic_adjust_io_region,
892 .find_io = nonstatic_find_io_region,
893 .find_mem = nonstatic_find_mem_region,
894 .add_io = adjust_io,
895 .add_mem = adjust_memory,
896 .init = nonstatic_init,
897 .exit = nonstatic_release_resource_db,
898 };
899 EXPORT_SYMBOL(pccard_nonstatic_ops);
900
901
902 /* sysfs interface to the resource database */
903
904 static ssize_t show_io_db(struct device *dev,
905 struct device_attribute *attr, char *buf)
906 {
907 struct pcmcia_socket *s = dev_get_drvdata(dev);
908 struct socket_data *data;
909 struct resource_map *p;
910 ssize_t ret = 0;
911
912 mutex_lock(&rsrc_mutex);
913 data = s->resource_data;
914
915 for (p = data->io_db.next; p != &data->io_db; p = p->next) {
916 if (ret > (PAGE_SIZE - 10))
917 continue;
918 ret += snprintf(&buf[ret], (PAGE_SIZE - ret - 1),
919 "0x%08lx - 0x%08lx\n",
920 ((unsigned long) p->base),
921 ((unsigned long) p->base + p->num - 1));
922 }
923
924 mutex_unlock(&rsrc_mutex);
925 return ret;
926 }
927
928 static ssize_t store_io_db(struct device *dev,
929 struct device_attribute *attr,
930 const char *buf, size_t count)
931 {
932 struct pcmcia_socket *s = dev_get_drvdata(dev);
933 unsigned long start_addr, end_addr;
934 unsigned int add = ADD_MANAGED_RESOURCE;
935 ssize_t ret = 0;
936
937 ret = sscanf(buf, "+ 0x%lx - 0x%lx", &start_addr, &end_addr);
938 if (ret != 2) {
939 ret = sscanf(buf, "- 0x%lx - 0x%lx", &start_addr, &end_addr);
940 add = REMOVE_MANAGED_RESOURCE;
941 if (ret != 2) {
942 ret = sscanf(buf, "0x%lx - 0x%lx", &start_addr,
943 &end_addr);
944 add = ADD_MANAGED_RESOURCE;
945 if (ret != 2)
946 return -EINVAL;
947 }
948 }
949 if (end_addr < start_addr)
950 return -EINVAL;
951
952 ret = adjust_io(s, add, start_addr, end_addr);
953 if (!ret)
954 s->resource_setup_new = 1;
955
956 return ret ? ret : count;
957 }
958 static DEVICE_ATTR(available_resources_io, 0600, show_io_db, store_io_db);
959
960 static ssize_t show_mem_db(struct device *dev,
961 struct device_attribute *attr, char *buf)
962 {
963 struct pcmcia_socket *s = dev_get_drvdata(dev);
964 struct socket_data *data;
965 struct resource_map *p;
966 ssize_t ret = 0;
967
968 mutex_lock(&rsrc_mutex);
969 data = s->resource_data;
970
971 for (p = data->mem_db.next; p != &data->mem_db; p = p->next) {
972 if (ret > (PAGE_SIZE - 10))
973 continue;
974 ret += snprintf(&buf[ret], (PAGE_SIZE - ret - 1),
975 "0x%08lx - 0x%08lx\n",
976 ((unsigned long) p->base),
977 ((unsigned long) p->base + p->num - 1));
978 }
979
980 mutex_unlock(&rsrc_mutex);
981 return ret;
982 }
983
984 static ssize_t store_mem_db(struct device *dev,
985 struct device_attribute *attr,
986 const char *buf, size_t count)
987 {
988 struct pcmcia_socket *s = dev_get_drvdata(dev);
989 unsigned long start_addr, end_addr;
990 unsigned int add = ADD_MANAGED_RESOURCE;
991 ssize_t ret = 0;
992
993 ret = sscanf(buf, "+ 0x%lx - 0x%lx", &start_addr, &end_addr);
994 if (ret != 2) {
995 ret = sscanf(buf, "- 0x%lx - 0x%lx", &start_addr, &end_addr);
996 add = REMOVE_MANAGED_RESOURCE;
997 if (ret != 2) {
998 ret = sscanf(buf, "0x%lx - 0x%lx", &start_addr,
999 &end_addr);
1000 add = ADD_MANAGED_RESOURCE;
1001 if (ret != 2)
1002 return -EINVAL;
1003 }
1004 }
1005 if (end_addr < start_addr)
1006 return -EINVAL;
1007
1008 ret = adjust_memory(s, add, start_addr, end_addr);
1009 if (!ret)
1010 s->resource_setup_new = 1;
1011
1012 return ret ? ret : count;
1013 }
1014 static DEVICE_ATTR(available_resources_mem, 0600, show_mem_db, store_mem_db);
1015
1016 static struct attribute *pccard_rsrc_attributes[] = {
1017 &dev_attr_available_resources_io.attr,
1018 &dev_attr_available_resources_mem.attr,
1019 NULL,
1020 };
1021
1022 static const struct attribute_group rsrc_attributes = {
1023 .attrs = pccard_rsrc_attributes,
1024 };
1025
1026 static int __devinit pccard_sysfs_add_rsrc(struct device *dev,
1027 struct class_interface *class_intf)
1028 {
1029 struct pcmcia_socket *s = dev_get_drvdata(dev);
1030
1031 if (s->resource_ops != &pccard_nonstatic_ops)
1032 return 0;
1033 return sysfs_create_group(&dev->kobj, &rsrc_attributes);
1034 }
1035
1036 static void __devexit pccard_sysfs_remove_rsrc(struct device *dev,
1037 struct class_interface *class_intf)
1038 {
1039 struct pcmcia_socket *s = dev_get_drvdata(dev);
1040
1041 if (s->resource_ops != &pccard_nonstatic_ops)
1042 return;
1043 sysfs_remove_group(&dev->kobj, &rsrc_attributes);
1044 }
1045
1046 static struct class_interface pccard_rsrc_interface __refdata = {
1047 .class = &pcmcia_socket_class,
1048 .add_dev = &pccard_sysfs_add_rsrc,
1049 .remove_dev = __devexit_p(&pccard_sysfs_remove_rsrc),
1050 };
1051
1052 static int __init nonstatic_sysfs_init(void)
1053 {
1054 return class_interface_register(&pccard_rsrc_interface);
1055 }
1056
1057 static void __exit nonstatic_sysfs_exit(void)
1058 {
1059 class_interface_unregister(&pccard_rsrc_interface);
1060 }
1061
1062 module_init(nonstatic_sysfs_init);
1063 module_exit(nonstatic_sysfs_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree