pcmcia: do not autoadd root PCI bus resources
[linux-2.6.git] / drivers / pcmcia / cistpl.c
1 /*
2  * cistpl.c -- 16-bit PCMCIA Card Information Structure parser
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/kernel.h>
18 #include <linux/string.h>
19 #include <linux/major.h>
20 #include <linux/errno.h>
21 #include <linux/timer.h>
22 #include <linux/slab.h>
23 #include <linux/mm.h>
24 #include <linux/pci.h>
25 #include <linux/ioport.h>
26 #include <linux/io.h>
27 #include <asm/byteorder.h>
28 #include <asm/unaligned.h>
29
30 #include <pcmcia/cs_types.h>
31 #include <pcmcia/ss.h>
32 #include <pcmcia/cs.h>
33 #include <pcmcia/cisreg.h>
34 #include <pcmcia/cistpl.h>
35 #include "cs_internal.h"
36
37 static const u_char mantissa[] = {
38     10, 12, 13, 15, 20, 25, 30, 35,
39     40, 45, 50, 55, 60, 70, 80, 90
40 };
41
42 static const u_int exponent[] = {
43     1, 10, 100, 1000, 10000, 100000, 1000000, 10000000
44 };
45
46 /* Convert an extended speed byte to a time in nanoseconds */
47 #define SPEED_CVT(v) \
48     (mantissa[(((v)>>3)&15)-1] * exponent[(v)&7] / 10)
49 /* Convert a power byte to a current in 0.1 microamps */
50 #define POWER_CVT(v) \
51     (mantissa[((v)>>3)&15] * exponent[(v)&7] / 10)
52 #define POWER_SCALE(v)          (exponent[(v)&7])
53
54 /* Upper limit on reasonable # of tuples */
55 #define MAX_TUPLES              200
56
57 /* 16-bit CIS? */
58 static int cis_width;
59 module_param(cis_width, int, 0444);
60
61 void release_cis_mem(struct pcmcia_socket *s)
62 {
63         mutex_lock(&s->ops_mutex);
64         if (s->cis_mem.flags & MAP_ACTIVE) {
65                 s->cis_mem.flags &= ~MAP_ACTIVE;
66                 s->ops->set_mem_map(s, &s->cis_mem);
67                 if (s->cis_mem.res) {
68                         release_resource(s->cis_mem.res);
69                         kfree(s->cis_mem.res);
70                         s->cis_mem.res = NULL;
71                 }
72                 iounmap(s->cis_virt);
73                 s->cis_virt = NULL;
74         }
75         mutex_unlock(&s->ops_mutex);
76 }
77
78 /**
79  * set_cis_map() - map the card memory at "card_offset" into virtual space.
80  *
81  * If flags & MAP_ATTRIB, map the attribute space, otherwise
82  * map the memory space.
83  *
84  * Must be called with ops_mutex held.
85  */
86 static void __iomem *set_cis_map(struct pcmcia_socket *s,
87                                 unsigned int card_offset, unsigned int flags)
88 {
89         pccard_mem_map *mem = &s->cis_mem;
90         int ret;
91
92         if (!(s->features & SS_CAP_STATIC_MAP) && (mem->res == NULL)) {
93                 mem->res = pcmcia_find_mem_region(0, s->map_size,
94                                                 s->map_size, 0, s);
95                 if (mem->res == NULL) {
96                         dev_printk(KERN_NOTICE, &s->dev,
97                                    "cs: unable to map card memory!\n");
98                         return NULL;
99                 }
100                 s->cis_virt = NULL;
101         }
102
103         if (!(s->features & SS_CAP_STATIC_MAP) && (!s->cis_virt))
104                 s->cis_virt = ioremap(mem->res->start, s->map_size);
105
106         mem->card_start = card_offset;
107         mem->flags = flags;
108
109         ret = s->ops->set_mem_map(s, mem);
110         if (ret) {
111                 iounmap(s->cis_virt);
112                 s->cis_virt = NULL;
113                 return NULL;
114         }
115
116         if (s->features & SS_CAP_STATIC_MAP) {
117                 if (s->cis_virt)
118                         iounmap(s->cis_virt);
119                 s->cis_virt = ioremap(mem->static_start, s->map_size);
120         }
121
122         return s->cis_virt;
123 }
124
125
126 /* Bits in attr field */
127 #define IS_ATTR         1
128 #define IS_INDIRECT     8
129
130 /**
131  * pcmcia_read_cis_mem() - low-level function to read CIS memory
132  */
133 int pcmcia_read_cis_mem(struct pcmcia_socket *s, int attr, u_int addr,
134                  u_int len, void *ptr)
135 {
136         void __iomem *sys, *end;
137         unsigned char *buf = ptr;
138
139         dev_dbg(&s->dev, "pcmcia_read_cis_mem(%d, %#x, %u)\n", attr, addr, len);
140
141         mutex_lock(&s->ops_mutex);
142         if (attr & IS_INDIRECT) {
143                 /* Indirect accesses use a bunch of special registers at fixed
144                    locations in common memory */
145                 u_char flags = ICTRL0_COMMON|ICTRL0_AUTOINC|ICTRL0_BYTEGRAN;
146                 if (attr & IS_ATTR) {
147                         addr *= 2;
148                         flags = ICTRL0_AUTOINC;
149                 }
150
151                 sys = set_cis_map(s, 0, MAP_ACTIVE |
152                                 ((cis_width) ? MAP_16BIT : 0));
153                 if (!sys) {
154                         dev_dbg(&s->dev, "could not map memory\n");
155                         memset(ptr, 0xff, len);
156                         mutex_unlock(&s->ops_mutex);
157                         return -1;
158                 }
159
160                 writeb(flags, sys+CISREG_ICTRL0);
161                 writeb(addr & 0xff, sys+CISREG_IADDR0);
162                 writeb((addr>>8) & 0xff, sys+CISREG_IADDR1);
163                 writeb((addr>>16) & 0xff, sys+CISREG_IADDR2);
164                 writeb((addr>>24) & 0xff, sys+CISREG_IADDR3);
165                 for ( ; len > 0; len--, buf++)
166                         *buf = readb(sys+CISREG_IDATA0);
167         } else {
168                 u_int inc = 1, card_offset, flags;
169
170                 if (addr > CISTPL_MAX_CIS_SIZE)
171                         dev_dbg(&s->dev,
172                                 "attempt to read CIS mem at addr %#x", addr);
173
174                 flags = MAP_ACTIVE | ((cis_width) ? MAP_16BIT : 0);
175                 if (attr) {
176                         flags |= MAP_ATTRIB;
177                         inc++;
178                         addr *= 2;
179                 }
180
181                 card_offset = addr & ~(s->map_size-1);
182                 while (len) {
183                         sys = set_cis_map(s, card_offset, flags);
184                         if (!sys) {
185                                 dev_dbg(&s->dev, "could not map memory\n");
186                                 memset(ptr, 0xff, len);
187                                 mutex_unlock(&s->ops_mutex);
188                                 return -1;
189                         }
190                         end = sys + s->map_size;
191                         sys = sys + (addr & (s->map_size-1));
192                         for ( ; len > 0; len--, buf++, sys += inc) {
193                                 if (sys == end)
194                                         break;
195                                 *buf = readb(sys);
196                         }
197                         card_offset += s->map_size;
198                         addr = 0;
199                 }
200         }
201         mutex_unlock(&s->ops_mutex);
202         dev_dbg(&s->dev, "  %#2.2x %#2.2x %#2.2x %#2.2x ...\n",
203                 *(u_char *)(ptr+0), *(u_char *)(ptr+1),
204                 *(u_char *)(ptr+2), *(u_char *)(ptr+3));
205         return 0;
206 }
207
208
209 /**
210  * pcmcia_write_cis_mem() - low-level function to write CIS memory
211  *
212  * Probably only useful for writing one-byte registers.
213  */
214 void pcmcia_write_cis_mem(struct pcmcia_socket *s, int attr, u_int addr,
215                    u_int len, void *ptr)
216 {
217         void __iomem *sys, *end;
218         unsigned char *buf = ptr;
219
220         dev_dbg(&s->dev,
221                 "pcmcia_write_cis_mem(%d, %#x, %u)\n", attr, addr, len);
222
223         mutex_lock(&s->ops_mutex);
224         if (attr & IS_INDIRECT) {
225                 /* Indirect accesses use a bunch of special registers at fixed
226                    locations in common memory */
227                 u_char flags = ICTRL0_COMMON|ICTRL0_AUTOINC|ICTRL0_BYTEGRAN;
228                 if (attr & IS_ATTR) {
229                         addr *= 2;
230                         flags = ICTRL0_AUTOINC;
231                 }
232
233                 sys = set_cis_map(s, 0, MAP_ACTIVE |
234                                 ((cis_width) ? MAP_16BIT : 0));
235                 if (!sys) {
236                         dev_dbg(&s->dev, "could not map memory\n");
237                         mutex_unlock(&s->ops_mutex);
238                         return; /* FIXME: Error */
239                 }
240
241                 writeb(flags, sys+CISREG_ICTRL0);
242                 writeb(addr & 0xff, sys+CISREG_IADDR0);
243                 writeb((addr>>8) & 0xff, sys+CISREG_IADDR1);
244                 writeb((addr>>16) & 0xff, sys+CISREG_IADDR2);
245                 writeb((addr>>24) & 0xff, sys+CISREG_IADDR3);
246                 for ( ; len > 0; len--, buf++)
247                         writeb(*buf, sys+CISREG_IDATA0);
248         } else {
249                 u_int inc = 1, card_offset, flags;
250
251                 flags = MAP_ACTIVE | ((cis_width) ? MAP_16BIT : 0);
252                 if (attr & IS_ATTR) {
253                         flags |= MAP_ATTRIB;
254                         inc++;
255                         addr *= 2;
256                 }
257
258                 card_offset = addr & ~(s->map_size-1);
259                 while (len) {
260                         sys = set_cis_map(s, card_offset, flags);
261                         if (!sys) {
262                                 dev_dbg(&s->dev, "could not map memory\n");
263                                 mutex_unlock(&s->ops_mutex);
264                                 return; /* FIXME: error */
265                         }
266
267                         end = sys + s->map_size;
268                         sys = sys + (addr & (s->map_size-1));
269                         for ( ; len > 0; len--, buf++, sys += inc) {
270                                 if (sys == end)
271                                         break;
272                                 writeb(*buf, sys);
273                         }
274                         card_offset += s->map_size;
275                         addr = 0;
276                 }
277         }
278         mutex_unlock(&s->ops_mutex);
279 }
280
281
282 /**
283  * read_cis_cache() - read CIS memory or its associated cache
284  *
285  * This is a wrapper around read_cis_mem, with the same interface,
286  * but which caches information, for cards whose CIS may not be
287  * readable all the time.
288  */
289 static int read_cis_cache(struct pcmcia_socket *s, int attr, u_int addr,
290                         size_t len, void *ptr)
291 {
292         struct cis_cache_entry *cis;
293         int ret = 0;
294
295         if (s->state & SOCKET_CARDBUS)
296                 return -EINVAL;
297
298         mutex_lock(&s->ops_mutex);
299         if (s->fake_cis) {
300                 if (s->fake_cis_len >= addr+len)
301                         memcpy(ptr, s->fake_cis+addr, len);
302                 else {
303                         memset(ptr, 0xff, len);
304                         ret = -EINVAL;
305                 }
306                 mutex_unlock(&s->ops_mutex);
307                 return ret;
308         }
309
310         list_for_each_entry(cis, &s->cis_cache, node) {
311                 if (cis->addr == addr && cis->len == len && cis->attr == attr) {
312                         memcpy(ptr, cis->cache, len);
313                         mutex_unlock(&s->ops_mutex);
314                         return 0;
315                 }
316         }
317         mutex_unlock(&s->ops_mutex);
318
319         ret = pcmcia_read_cis_mem(s, attr, addr, len, ptr);
320
321         if (ret == 0) {
322                 /* Copy data into the cache */
323                 cis = kmalloc(sizeof(struct cis_cache_entry) + len, GFP_KERNEL);
324                 if (cis) {
325                         cis->addr = addr;
326                         cis->len = len;
327                         cis->attr = attr;
328                         memcpy(cis->cache, ptr, len);
329                         mutex_lock(&s->ops_mutex);
330                         list_add(&cis->node, &s->cis_cache);
331                         mutex_unlock(&s->ops_mutex);
332                 }
333         }
334         return ret;
335 }
336
337 static void
338 remove_cis_cache(struct pcmcia_socket *s, int attr, u_int addr, u_int len)
339 {
340         struct cis_cache_entry *cis;
341
342         mutex_lock(&s->ops_mutex);
343         list_for_each_entry(cis, &s->cis_cache, node)
344                 if (cis->addr == addr && cis->len == len && cis->attr == attr) {
345                         list_del(&cis->node);
346                         kfree(cis);
347                         break;
348                 }
349         mutex_unlock(&s->ops_mutex);
350 }
351
352 /**
353  * destroy_cis_cache() - destroy the CIS cache
354  * @s:          pcmcia_socket for which CIS cache shall be destroyed
355  *
356  * This destroys the CIS cache but keeps any fake CIS alive. Must be
357  * called with ops_mutex held.
358  */
359 void destroy_cis_cache(struct pcmcia_socket *s)
360 {
361         struct list_head *l, *n;
362         struct cis_cache_entry *cis;
363
364         list_for_each_safe(l, n, &s->cis_cache) {
365                 cis = list_entry(l, struct cis_cache_entry, node);
366                 list_del(&cis->node);
367                 kfree(cis);
368         }
369 }
370
371 /**
372  * verify_cis_cache() - does the CIS match what is in the CIS cache?
373  */
374 int verify_cis_cache(struct pcmcia_socket *s)
375 {
376         struct cis_cache_entry *cis;
377         char *buf;
378         int ret;
379
380         if (s->state & SOCKET_CARDBUS)
381                 return -EINVAL;
382
383         buf = kmalloc(256, GFP_KERNEL);
384         if (buf == NULL) {
385                 dev_printk(KERN_WARNING, &s->dev,
386                            "no memory for verifying CIS\n");
387                 return -ENOMEM;
388         }
389         list_for_each_entry(cis, &s->cis_cache, node) {
390                 int len = cis->len;
391
392                 if (len > 256)
393                         len = 256;
394
395                 ret = pcmcia_read_cis_mem(s, cis->attr, cis->addr, len, buf);
396                 if (ret || memcmp(buf, cis->cache, len) != 0) {
397                         kfree(buf);
398                         return -1;
399                 }
400         }
401         kfree(buf);
402         return 0;
403 }
404
405 /**
406  * pcmcia_replace_cis() - use a replacement CIS instead of the card's CIS
407  *
408  * For really bad cards, we provide a facility for uploading a
409  * replacement CIS.
410  */
411 int pcmcia_replace_cis(struct pcmcia_socket *s,
412                        const u8 *data, const size_t len)
413 {
414         if (len > CISTPL_MAX_CIS_SIZE) {
415                 dev_printk(KERN_WARNING, &s->dev, "replacement CIS too big\n");
416                 return -EINVAL;
417         }
418         mutex_lock(&s->ops_mutex);
419         kfree(s->fake_cis);
420         s->fake_cis = kmalloc(len, GFP_KERNEL);
421         if (s->fake_cis == NULL) {
422                 dev_printk(KERN_WARNING, &s->dev, "no memory to replace CIS\n");
423                 mutex_unlock(&s->ops_mutex);
424                 return -ENOMEM;
425         }
426         s->fake_cis_len = len;
427         memcpy(s->fake_cis, data, len);
428         dev_info(&s->dev, "Using replacement CIS\n");
429         mutex_unlock(&s->ops_mutex);
430         return 0;
431 }
432
433 /* The high-level CIS tuple services */
434
435 typedef struct tuple_flags {
436         u_int           link_space:4;
437         u_int           has_link:1;
438         u_int           mfc_fn:3;
439         u_int           space:4;
440 } tuple_flags;
441
442 #define LINK_SPACE(f)   (((tuple_flags *)(&(f)))->link_space)
443 #define HAS_LINK(f)     (((tuple_flags *)(&(f)))->has_link)
444 #define MFC_FN(f)       (((tuple_flags *)(&(f)))->mfc_fn)
445 #define SPACE(f)        (((tuple_flags *)(&(f)))->space)
446
447 int pccard_get_first_tuple(struct pcmcia_socket *s, unsigned int function,
448                         tuple_t *tuple)
449 {
450         if (!s)
451                 return -EINVAL;
452
453         if (!(s->state & SOCKET_PRESENT) || (s->state & SOCKET_CARDBUS))
454                 return -ENODEV;
455         tuple->TupleLink = tuple->Flags = 0;
456
457         /* Assume presence of a LONGLINK_C to address 0 */
458         tuple->CISOffset = tuple->LinkOffset = 0;
459         SPACE(tuple->Flags) = HAS_LINK(tuple->Flags) = 1;
460
461         if ((s->functions > 1) && !(tuple->Attributes & TUPLE_RETURN_COMMON)) {
462                 cisdata_t req = tuple->DesiredTuple;
463                 tuple->DesiredTuple = CISTPL_LONGLINK_MFC;
464                 if (pccard_get_next_tuple(s, function, tuple) == 0) {
465                         tuple->DesiredTuple = CISTPL_LINKTARGET;
466                         if (pccard_get_next_tuple(s, function, tuple) != 0)
467                                 return -ENOSPC;
468                 } else
469                         tuple->CISOffset = tuple->TupleLink = 0;
470                 tuple->DesiredTuple = req;
471         }
472         return pccard_get_next_tuple(s, function, tuple);
473 }
474
475 static int follow_link(struct pcmcia_socket *s, tuple_t *tuple)
476 {
477         u_char link[5];
478         u_int ofs;
479         int ret;
480
481         if (MFC_FN(tuple->Flags)) {
482                 /* Get indirect link from the MFC tuple */
483                 ret = read_cis_cache(s, LINK_SPACE(tuple->Flags),
484                                 tuple->LinkOffset, 5, link);
485                 if (ret)
486                         return -1;
487                 ofs = get_unaligned_le32(link + 1);
488                 SPACE(tuple->Flags) = (link[0] == CISTPL_MFC_ATTR);
489                 /* Move to the next indirect link */
490                 tuple->LinkOffset += 5;
491                 MFC_FN(tuple->Flags)--;
492         } else if (HAS_LINK(tuple->Flags)) {
493                 ofs = tuple->LinkOffset;
494                 SPACE(tuple->Flags) = LINK_SPACE(tuple->Flags);
495                 HAS_LINK(tuple->Flags) = 0;
496         } else
497                 return -1;
498
499         if (SPACE(tuple->Flags)) {
500                 /* This is ugly, but a common CIS error is to code the long
501                    link offset incorrectly, so we check the right spot... */
502                 ret = read_cis_cache(s, SPACE(tuple->Flags), ofs, 5, link);
503                 if (ret)
504                         return -1;
505                 if ((link[0] == CISTPL_LINKTARGET) && (link[1] >= 3) &&
506                         (strncmp(link+2, "CIS", 3) == 0))
507                         return ofs;
508                 remove_cis_cache(s, SPACE(tuple->Flags), ofs, 5);
509                 /* Then, we try the wrong spot... */
510                 ofs = ofs >> 1;
511         }
512         ret = read_cis_cache(s, SPACE(tuple->Flags), ofs, 5, link);
513         if (ret)
514                 return -1;
515         if ((link[0] == CISTPL_LINKTARGET) && (link[1] >= 3) &&
516                 (strncmp(link+2, "CIS", 3) == 0))
517                 return ofs;
518         remove_cis_cache(s, SPACE(tuple->Flags), ofs, 5);
519         return -1;
520 }
521
522 int pccard_get_next_tuple(struct pcmcia_socket *s, unsigned int function,
523                         tuple_t *tuple)
524 {
525         u_char link[2], tmp;
526         int ofs, i, attr;
527         int ret;
528
529         if (!s)
530                 return -EINVAL;
531         if (!(s->state & SOCKET_PRESENT) || (s->state & SOCKET_CARDBUS))
532                 return -ENODEV;
533
534         link[1] = tuple->TupleLink;
535         ofs = tuple->CISOffset + tuple->TupleLink;
536         attr = SPACE(tuple->Flags);
537
538         for (i = 0; i < MAX_TUPLES; i++) {
539                 if (link[1] == 0xff)
540                         link[0] = CISTPL_END;
541                 else {
542                         ret = read_cis_cache(s, attr, ofs, 2, link);
543                         if (ret)
544                                 return -1;
545                         if (link[0] == CISTPL_NULL) {
546                                 ofs++;
547                                 continue;
548                         }
549                 }
550
551                 /* End of chain?  Follow long link if possible */
552                 if (link[0] == CISTPL_END) {
553                         ofs = follow_link(s, tuple);
554                         if (ofs < 0)
555                                 return -ENOSPC;
556                         attr = SPACE(tuple->Flags);
557                         ret = read_cis_cache(s, attr, ofs, 2, link);
558                         if (ret)
559                                 return -1;
560                 }
561
562                 /* Is this a link tuple?  Make a note of it */
563                 if ((link[0] == CISTPL_LONGLINK_A) ||
564                         (link[0] == CISTPL_LONGLINK_C) ||
565                         (link[0] == CISTPL_LONGLINK_MFC) ||
566                         (link[0] == CISTPL_LINKTARGET) ||
567                         (link[0] == CISTPL_INDIRECT) ||
568                         (link[0] == CISTPL_NO_LINK)) {
569                         switch (link[0]) {
570                         case CISTPL_LONGLINK_A:
571                                 HAS_LINK(tuple->Flags) = 1;
572                                 LINK_SPACE(tuple->Flags) = attr | IS_ATTR;
573                                 ret = read_cis_cache(s, attr, ofs+2, 4,
574                                                 &tuple->LinkOffset);
575                                 if (ret)
576                                         return -1;
577                                 break;
578                         case CISTPL_LONGLINK_C:
579                                 HAS_LINK(tuple->Flags) = 1;
580                                 LINK_SPACE(tuple->Flags) = attr & ~IS_ATTR;
581                                 ret = read_cis_cache(s, attr, ofs+2, 4,
582                                                 &tuple->LinkOffset);
583                                 if (ret)
584                                         return -1;
585                                 break;
586                         case CISTPL_INDIRECT:
587                                 HAS_LINK(tuple->Flags) = 1;
588                                 LINK_SPACE(tuple->Flags) = IS_ATTR |
589                                         IS_INDIRECT;
590                                 tuple->LinkOffset = 0;
591                                 break;
592                         case CISTPL_LONGLINK_MFC:
593                                 tuple->LinkOffset = ofs + 3;
594                                 LINK_SPACE(tuple->Flags) = attr;
595                                 if (function == BIND_FN_ALL) {
596                                         /* Follow all the MFC links */
597                                         ret = read_cis_cache(s, attr, ofs+2,
598                                                         1, &tmp);
599                                         if (ret)
600                                                 return -1;
601                                         MFC_FN(tuple->Flags) = tmp;
602                                 } else {
603                                         /* Follow exactly one of the links */
604                                         MFC_FN(tuple->Flags) = 1;
605                                         tuple->LinkOffset += function * 5;
606                                 }
607                                 break;
608                         case CISTPL_NO_LINK:
609                                 HAS_LINK(tuple->Flags) = 0;
610                                 break;
611                         }
612                         if ((tuple->Attributes & TUPLE_RETURN_LINK) &&
613                                 (tuple->DesiredTuple == RETURN_FIRST_TUPLE))
614                                 break;
615                 } else
616                         if (tuple->DesiredTuple == RETURN_FIRST_TUPLE)
617                                 break;
618
619                 if (link[0] == tuple->DesiredTuple)
620                         break;
621                 ofs += link[1] + 2;
622         }
623         if (i == MAX_TUPLES) {
624                 dev_dbg(&s->dev, "cs: overrun in pcmcia_get_next_tuple\n");
625                 return -ENOSPC;
626         }
627
628         tuple->TupleCode = link[0];
629         tuple->TupleLink = link[1];
630         tuple->CISOffset = ofs + 2;
631         return 0;
632 }
633
634 int pccard_get_tuple_data(struct pcmcia_socket *s, tuple_t *tuple)
635 {
636         u_int len;
637         int ret;
638
639         if (!s)
640                 return -EINVAL;
641
642         if (tuple->TupleLink < tuple->TupleOffset)
643                 return -ENOSPC;
644         len = tuple->TupleLink - tuple->TupleOffset;
645         tuple->TupleDataLen = tuple->TupleLink;
646         if (len == 0)
647                 return 0;
648         ret = read_cis_cache(s, SPACE(tuple->Flags),
649                         tuple->CISOffset + tuple->TupleOffset,
650                         min(len, (u_int) tuple->TupleDataMax),
651                         tuple->TupleData);
652         if (ret)
653                 return -1;
654         return 0;
655 }
656
657
658 /* Parsing routines for individual tuples */
659
660 static int parse_device(tuple_t *tuple, cistpl_device_t *device)
661 {
662         int i;
663         u_char scale;
664         u_char *p, *q;
665
666         p = (u_char *)tuple->TupleData;
667         q = p + tuple->TupleDataLen;
668
669         device->ndev = 0;
670         for (i = 0; i < CISTPL_MAX_DEVICES; i++) {
671
672                 if (*p == 0xff)
673                         break;
674                 device->dev[i].type = (*p >> 4);
675                 device->dev[i].wp = (*p & 0x08) ? 1 : 0;
676                 switch (*p & 0x07) {
677                 case 0:
678                         device->dev[i].speed = 0;
679                         break;
680                 case 1:
681                         device->dev[i].speed = 250;
682                         break;
683                 case 2:
684                         device->dev[i].speed = 200;
685                         break;
686                 case 3:
687                         device->dev[i].speed = 150;
688                         break;
689                 case 4:
690                         device->dev[i].speed = 100;
691                         break;
692                 case 7:
693                         if (++p == q)
694                                 return -EINVAL;
695                         device->dev[i].speed = SPEED_CVT(*p);
696                         while (*p & 0x80)
697                                 if (++p == q)
698                                         return -EINVAL;
699                         break;
700                 default:
701                         return -EINVAL;
702                 }
703
704                 if (++p == q)
705                         return -EINVAL;
706                 if (*p == 0xff)
707                         break;
708                 scale = *p & 7;
709                 if (scale == 7)
710                         return -EINVAL;
711                 device->dev[i].size = ((*p >> 3) + 1) * (512 << (scale*2));
712                 device->ndev++;
713                 if (++p == q)
714                         break;
715         }
716
717         return 0;
718 }
719
720
721 static int parse_checksum(tuple_t *tuple, cistpl_checksum_t *csum)
722 {
723         u_char *p;
724         if (tuple->TupleDataLen < 5)
725                 return -EINVAL;
726         p = (u_char *) tuple->TupleData;
727         csum->addr = tuple->CISOffset + get_unaligned_le16(p) - 2;
728         csum->len = get_unaligned_le16(p + 2);
729         csum->sum = *(p + 4);
730         return 0;
731 }
732
733
734 static int parse_longlink(tuple_t *tuple, cistpl_longlink_t *link)
735 {
736         if (tuple->TupleDataLen < 4)
737                 return -EINVAL;
738         link->addr = get_unaligned_le32(tuple->TupleData);
739         return 0;
740 }
741
742
743 static int parse_longlink_mfc(tuple_t *tuple, cistpl_longlink_mfc_t *link)
744 {
745         u_char *p;
746         int i;
747
748         p = (u_char *)tuple->TupleData;
749
750         link->nfn = *p; p++;
751         if (tuple->TupleDataLen <= link->nfn*5)
752                 return -EINVAL;
753         for (i = 0; i < link->nfn; i++) {
754                 link->fn[i].space = *p; p++;
755                 link->fn[i].addr = get_unaligned_le32(p);
756                 p += 4;
757         }
758         return 0;
759 }
760
761
762 static int parse_strings(u_char *p, u_char *q, int max,
763                          char *s, u_char *ofs, u_char *found)
764 {
765         int i, j, ns;
766
767         if (p == q)
768                 return -EINVAL;
769         ns = 0; j = 0;
770         for (i = 0; i < max; i++) {
771                 if (*p == 0xff)
772                         break;
773                 ofs[i] = j;
774                 ns++;
775                 for (;;) {
776                         s[j++] = (*p == 0xff) ? '\0' : *p;
777                         if ((*p == '\0') || (*p == 0xff))
778                                 break;
779                         if (++p == q)
780                                 return -EINVAL;
781                 }
782                 if ((*p == 0xff) || (++p == q))
783                         break;
784         }
785         if (found) {
786                 *found = ns;
787                 return 0;
788         }
789
790         return (ns == max) ? 0 : -EINVAL;
791 }
792
793
794 static int parse_vers_1(tuple_t *tuple, cistpl_vers_1_t *vers_1)
795 {
796         u_char *p, *q;
797
798         p = (u_char *)tuple->TupleData;
799         q = p + tuple->TupleDataLen;
800
801         vers_1->major = *p; p++;
802         vers_1->minor = *p; p++;
803         if (p >= q)
804                 return -EINVAL;
805
806         return parse_strings(p, q, CISTPL_VERS_1_MAX_PROD_STRINGS,
807                         vers_1->str, vers_1->ofs, &vers_1->ns);
808 }
809
810
811 static int parse_altstr(tuple_t *tuple, cistpl_altstr_t *altstr)
812 {
813         u_char *p, *q;
814
815         p = (u_char *)tuple->TupleData;
816         q = p + tuple->TupleDataLen;
817
818         return parse_strings(p, q, CISTPL_MAX_ALTSTR_STRINGS,
819                         altstr->str, altstr->ofs, &altstr->ns);
820 }
821
822
823 static int parse_jedec(tuple_t *tuple, cistpl_jedec_t *jedec)
824 {
825         u_char *p, *q;
826         int nid;
827
828         p = (u_char *)tuple->TupleData;
829         q = p + tuple->TupleDataLen;
830
831         for (nid = 0; nid < CISTPL_MAX_DEVICES; nid++) {
832                 if (p > q-2)
833                         break;
834                 jedec->id[nid].mfr = p[0];
835                 jedec->id[nid].info = p[1];
836                 p += 2;
837         }
838         jedec->nid = nid;
839         return 0;
840 }
841
842
843 static int parse_manfid(tuple_t *tuple, cistpl_manfid_t *m)
844 {
845         if (tuple->TupleDataLen < 4)
846                 return -EINVAL;
847         m->manf = get_unaligned_le16(tuple->TupleData);
848         m->card = get_unaligned_le16(tuple->TupleData + 2);
849         return 0;
850 }
851
852
853 static int parse_funcid(tuple_t *tuple, cistpl_funcid_t *f)
854 {
855         u_char *p;
856         if (tuple->TupleDataLen < 2)
857                 return -EINVAL;
858         p = (u_char *)tuple->TupleData;
859         f->func = p[0];
860         f->sysinit = p[1];
861         return 0;
862 }
863
864
865 static int parse_funce(tuple_t *tuple, cistpl_funce_t *f)
866 {
867         u_char *p;
868         int i;
869         if (tuple->TupleDataLen < 1)
870                 return -EINVAL;
871         p = (u_char *)tuple->TupleData;
872         f->type = p[0];
873         for (i = 1; i < tuple->TupleDataLen; i++)
874                 f->data[i-1] = p[i];
875         return 0;
876 }
877
878
879 static int parse_config(tuple_t *tuple, cistpl_config_t *config)
880 {
881         int rasz, rmsz, i;
882         u_char *p;
883
884         p = (u_char *)tuple->TupleData;
885         rasz = *p & 0x03;
886         rmsz = (*p & 0x3c) >> 2;
887         if (tuple->TupleDataLen < rasz+rmsz+4)
888                 return -EINVAL;
889         config->last_idx = *(++p);
890         p++;
891         config->base = 0;
892         for (i = 0; i <= rasz; i++)
893                 config->base += p[i] << (8*i);
894         p += rasz+1;
895         for (i = 0; i < 4; i++)
896                 config->rmask[i] = 0;
897         for (i = 0; i <= rmsz; i++)
898                 config->rmask[i>>2] += p[i] << (8*(i%4));
899         config->subtuples = tuple->TupleDataLen - (rasz+rmsz+4);
900         return 0;
901 }
902
903 /* The following routines are all used to parse the nightmarish
904  * config table entries.
905  */
906
907 static u_char *parse_power(u_char *p, u_char *q, cistpl_power_t *pwr)
908 {
909         int i;
910         u_int scale;
911
912         if (p == q)
913                 return NULL;
914         pwr->present = *p;
915         pwr->flags = 0;
916         p++;
917         for (i = 0; i < 7; i++)
918                 if (pwr->present & (1<<i)) {
919                         if (p == q)
920                                 return NULL;
921                         pwr->param[i] = POWER_CVT(*p);
922                         scale = POWER_SCALE(*p);
923                         while (*p & 0x80) {
924                                 if (++p == q)
925                                         return NULL;
926                                 if ((*p & 0x7f) < 100)
927                                         pwr->param[i] +=
928                                                 (*p & 0x7f) * scale / 100;
929                                 else if (*p == 0x7d)
930                                         pwr->flags |= CISTPL_POWER_HIGHZ_OK;
931                                 else if (*p == 0x7e)
932                                         pwr->param[i] = 0;
933                                 else if (*p == 0x7f)
934                                         pwr->flags |= CISTPL_POWER_HIGHZ_REQ;
935                                 else
936                                         return NULL;
937                         }
938                         p++;
939                 }
940         return p;
941 }
942
943
944 static u_char *parse_timing(u_char *p, u_char *q, cistpl_timing_t *timing)
945 {
946         u_char scale;
947
948         if (p == q)
949                 return NULL;
950         scale = *p;
951         if ((scale & 3) != 3) {
952                 if (++p == q)
953                         return NULL;
954                 timing->wait = SPEED_CVT(*p);
955                 timing->waitscale = exponent[scale & 3];
956         } else
957                 timing->wait = 0;
958         scale >>= 2;
959         if ((scale & 7) != 7) {
960                 if (++p == q)
961                         return NULL;
962                 timing->ready = SPEED_CVT(*p);
963                 timing->rdyscale = exponent[scale & 7];
964         } else
965                 timing->ready = 0;
966         scale >>= 3;
967         if (scale != 7) {
968                 if (++p == q)
969                         return NULL;
970                 timing->reserved = SPEED_CVT(*p);
971                 timing->rsvscale = exponent[scale];
972         } else
973                 timing->reserved = 0;
974         p++;
975         return p;
976 }
977
978
979 static u_char *parse_io(u_char *p, u_char *q, cistpl_io_t *io)
980 {
981         int i, j, bsz, lsz;
982
983         if (p == q)
984                 return NULL;
985         io->flags = *p;
986
987         if (!(*p & 0x80)) {
988                 io->nwin = 1;
989                 io->win[0].base = 0;
990                 io->win[0].len = (1 << (io->flags & CISTPL_IO_LINES_MASK));
991                 return p+1;
992         }
993
994         if (++p == q)
995                 return NULL;
996         io->nwin = (*p & 0x0f) + 1;
997         bsz = (*p & 0x30) >> 4;
998         if (bsz == 3)
999                 bsz++;
1000         lsz = (*p & 0xc0) >> 6;
1001         if (lsz == 3)
1002                 lsz++;
1003         p++;
1004
1005         for (i = 0; i < io->nwin; i++) {
1006                 io->win[i].base = 0;
1007                 io->win[i].len = 1;
1008                 for (j = 0; j < bsz; j++, p++) {
1009                         if (p == q)
1010                                 return NULL;
1011                         io->win[i].base += *p << (j*8);
1012                 }
1013                 for (j = 0; j < lsz; j++, p++) {
1014                         if (p == q)
1015                                 return NULL;
1016                         io->win[i].len += *p << (j*8);
1017                 }
1018         }
1019         return p;
1020 }
1021
1022
1023 static u_char *parse_mem(u_char *p, u_char *q, cistpl_mem_t *mem)
1024 {
1025         int i, j, asz, lsz, has_ha;
1026         u_int len, ca, ha;
1027
1028         if (p == q)
1029                 return NULL;
1030
1031         mem->nwin = (*p & 0x07) + 1;
1032         lsz = (*p & 0x18) >> 3;
1033         asz = (*p & 0x60) >> 5;
1034         has_ha = (*p & 0x80);
1035         if (++p == q)
1036                 return NULL;
1037
1038         for (i = 0; i < mem->nwin; i++) {
1039                 len = ca = ha = 0;
1040                 for (j = 0; j < lsz; j++, p++) {
1041                         if (p == q)
1042                                 return NULL;
1043                         len += *p << (j*8);
1044                 }
1045                 for (j = 0; j < asz; j++, p++) {
1046                         if (p == q)
1047                                 return NULL;
1048                         ca += *p << (j*8);
1049                 }
1050                 if (has_ha)
1051                         for (j = 0; j < asz; j++, p++) {
1052                                 if (p == q)
1053                                         return NULL;
1054                                 ha += *p << (j*8);
1055                         }
1056                 mem->win[i].len = len << 8;
1057                 mem->win[i].card_addr = ca << 8;
1058                 mem->win[i].host_addr = ha << 8;
1059         }
1060         return p;
1061 }
1062
1063
1064 static u_char *parse_irq(u_char *p, u_char *q, cistpl_irq_t *irq)
1065 {
1066         if (p == q)
1067                 return NULL;
1068         irq->IRQInfo1 = *p; p++;
1069         if (irq->IRQInfo1 & IRQ_INFO2_VALID) {
1070                 if (p+2 > q)
1071                         return NULL;
1072                 irq->IRQInfo2 = (p[1]<<8) + p[0];
1073                 p += 2;
1074         }
1075         return p;
1076 }
1077
1078
1079 static int parse_cftable_entry(tuple_t *tuple,
1080                                cistpl_cftable_entry_t *entry)
1081 {
1082         u_char *p, *q, features;
1083
1084         p = tuple->TupleData;
1085         q = p + tuple->TupleDataLen;
1086         entry->index = *p & 0x3f;
1087         entry->flags = 0;
1088         if (*p & 0x40)
1089                 entry->flags |= CISTPL_CFTABLE_DEFAULT;
1090         if (*p & 0x80) {
1091                 if (++p == q)
1092                         return -EINVAL;
1093                 if (*p & 0x10)
1094                         entry->flags |= CISTPL_CFTABLE_BVDS;
1095                 if (*p & 0x20)
1096                         entry->flags |= CISTPL_CFTABLE_WP;
1097                 if (*p & 0x40)
1098                         entry->flags |= CISTPL_CFTABLE_RDYBSY;
1099                 if (*p & 0x80)
1100                         entry->flags |= CISTPL_CFTABLE_MWAIT;
1101                 entry->interface = *p & 0x0f;
1102         } else
1103                 entry->interface = 0;
1104
1105         /* Process optional features */
1106         if (++p == q)
1107                 return -EINVAL;
1108         features = *p; p++;
1109
1110         /* Power options */
1111         if ((features & 3) > 0) {
1112                 p = parse_power(p, q, &entry->vcc);
1113                 if (p == NULL)
1114                         return -EINVAL;
1115         } else
1116                 entry->vcc.present = 0;
1117         if ((features & 3) > 1) {
1118                 p = parse_power(p, q, &entry->vpp1);
1119                 if (p == NULL)
1120                         return -EINVAL;
1121         } else
1122                 entry->vpp1.present = 0;
1123         if ((features & 3) > 2) {
1124                 p = parse_power(p, q, &entry->vpp2);
1125                 if (p == NULL)
1126                         return -EINVAL;
1127         } else
1128                 entry->vpp2.present = 0;
1129
1130         /* Timing options */
1131         if (features & 0x04) {
1132                 p = parse_timing(p, q, &entry->timing);
1133                 if (p == NULL)
1134                         return -EINVAL;
1135         } else {
1136                 entry->timing.wait = 0;
1137                 entry->timing.ready = 0;
1138                 entry->timing.reserved = 0;
1139         }
1140
1141         /* I/O window options */
1142         if (features & 0x08) {
1143                 p = parse_io(p, q, &entry->io);
1144                 if (p == NULL)
1145                         return -EINVAL;
1146         } else
1147                 entry->io.nwin = 0;
1148
1149         /* Interrupt options */
1150         if (features & 0x10) {
1151                 p = parse_irq(p, q, &entry->irq);
1152                 if (p == NULL)
1153                         return -EINVAL;
1154         } else
1155                 entry->irq.IRQInfo1 = 0;
1156
1157         switch (features & 0x60) {
1158         case 0x00:
1159                 entry->mem.nwin = 0;
1160                 break;
1161         case 0x20:
1162                 entry->mem.nwin = 1;
1163                 entry->mem.win[0].len = get_unaligned_le16(p) << 8;
1164                 entry->mem.win[0].card_addr = 0;
1165                 entry->mem.win[0].host_addr = 0;
1166                 p += 2;
1167                 if (p > q)
1168                         return -EINVAL;
1169                 break;
1170         case 0x40:
1171                 entry->mem.nwin = 1;
1172                 entry->mem.win[0].len = get_unaligned_le16(p) << 8;
1173                 entry->mem.win[0].card_addr = get_unaligned_le16(p + 2) << 8;
1174                 entry->mem.win[0].host_addr = 0;
1175                 p += 4;
1176                 if (p > q)
1177                         return -EINVAL;
1178                 break;
1179         case 0x60:
1180                 p = parse_mem(p, q, &entry->mem);
1181                 if (p == NULL)
1182                         return -EINVAL;
1183                 break;
1184         }
1185
1186         /* Misc features */
1187         if (features & 0x80) {
1188                 if (p == q)
1189                         return -EINVAL;
1190                 entry->flags |= (*p << 8);
1191                 while (*p & 0x80)
1192                         if (++p == q)
1193                                 return -EINVAL;
1194                 p++;
1195         }
1196
1197         entry->subtuples = q-p;
1198
1199         return 0;
1200 }
1201
1202
1203 static int parse_device_geo(tuple_t *tuple, cistpl_device_geo_t *geo)
1204 {
1205         u_char *p, *q;
1206         int n;
1207
1208         p = (u_char *)tuple->TupleData;
1209         q = p + tuple->TupleDataLen;
1210
1211         for (n = 0; n < CISTPL_MAX_DEVICES; n++) {
1212                 if (p > q-6)
1213                         break;
1214                 geo->geo[n].buswidth = p[0];
1215                 geo->geo[n].erase_block = 1 << (p[1]-1);
1216                 geo->geo[n].read_block  = 1 << (p[2]-1);
1217                 geo->geo[n].write_block = 1 << (p[3]-1);
1218                 geo->geo[n].partition   = 1 << (p[4]-1);
1219                 geo->geo[n].interleave  = 1 << (p[5]-1);
1220                 p += 6;
1221         }
1222         geo->ngeo = n;
1223         return 0;
1224 }
1225
1226
1227 static int parse_vers_2(tuple_t *tuple, cistpl_vers_2_t *v2)
1228 {
1229         u_char *p, *q;
1230
1231         if (tuple->TupleDataLen < 10)
1232                 return -EINVAL;
1233
1234         p = tuple->TupleData;
1235         q = p + tuple->TupleDataLen;
1236
1237         v2->vers = p[0];
1238         v2->comply = p[1];
1239         v2->dindex = get_unaligned_le16(p + 2);
1240         v2->vspec8 = p[6];
1241         v2->vspec9 = p[7];
1242         v2->nhdr = p[8];
1243         p += 9;
1244         return parse_strings(p, q, 2, v2->str, &v2->vendor, NULL);
1245 }
1246
1247
1248 static int parse_org(tuple_t *tuple, cistpl_org_t *org)
1249 {
1250         u_char *p, *q;
1251         int i;
1252
1253         p = tuple->TupleData;
1254         q = p + tuple->TupleDataLen;
1255         if (p == q)
1256                 return -EINVAL;
1257         org->data_org = *p;
1258         if (++p == q)
1259                 return -EINVAL;
1260         for (i = 0; i < 30; i++) {
1261                 org->desc[i] = *p;
1262                 if (*p == '\0')
1263                         break;
1264                 if (++p == q)
1265                         return -EINVAL;
1266         }
1267         return 0;
1268 }
1269
1270
1271 static int parse_format(tuple_t *tuple, cistpl_format_t *fmt)
1272 {
1273         u_char *p;
1274
1275         if (tuple->TupleDataLen < 10)
1276                 return -EINVAL;
1277
1278         p = tuple->TupleData;
1279
1280         fmt->type = p[0];
1281         fmt->edc = p[1];
1282         fmt->offset = get_unaligned_le32(p + 2);
1283         fmt->length = get_unaligned_le32(p + 6);
1284
1285         return 0;
1286 }
1287
1288
1289 int pcmcia_parse_tuple(tuple_t *tuple, cisparse_t *parse)
1290 {
1291         int ret = 0;
1292
1293         if (tuple->TupleDataLen > tuple->TupleDataMax)
1294                 return -EINVAL;
1295         switch (tuple->TupleCode) {
1296         case CISTPL_DEVICE:
1297         case CISTPL_DEVICE_A:
1298                 ret = parse_device(tuple, &parse->device);
1299                 break;
1300         case CISTPL_CHECKSUM:
1301                 ret = parse_checksum(tuple, &parse->checksum);
1302                 break;
1303         case CISTPL_LONGLINK_A:
1304         case CISTPL_LONGLINK_C:
1305                 ret = parse_longlink(tuple, &parse->longlink);
1306                 break;
1307         case CISTPL_LONGLINK_MFC:
1308                 ret = parse_longlink_mfc(tuple, &parse->longlink_mfc);
1309                 break;
1310         case CISTPL_VERS_1:
1311                 ret = parse_vers_1(tuple, &parse->version_1);
1312                 break;
1313         case CISTPL_ALTSTR:
1314                 ret = parse_altstr(tuple, &parse->altstr);
1315                 break;
1316         case CISTPL_JEDEC_A:
1317         case CISTPL_JEDEC_C:
1318                 ret = parse_jedec(tuple, &parse->jedec);
1319                 break;
1320         case CISTPL_MANFID:
1321                 ret = parse_manfid(tuple, &parse->manfid);
1322                 break;
1323         case CISTPL_FUNCID:
1324                 ret = parse_funcid(tuple, &parse->funcid);
1325                 break;
1326         case CISTPL_FUNCE:
1327                 ret = parse_funce(tuple, &parse->funce);
1328                 break;
1329         case CISTPL_CONFIG:
1330                 ret = parse_config(tuple, &parse->config);
1331                 break;
1332         case CISTPL_CFTABLE_ENTRY:
1333                 ret = parse_cftable_entry(tuple, &parse->cftable_entry);
1334                 break;
1335         case CISTPL_DEVICE_GEO:
1336         case CISTPL_DEVICE_GEO_A:
1337                 ret = parse_device_geo(tuple, &parse->device_geo);
1338                 break;
1339         case CISTPL_VERS_2:
1340                 ret = parse_vers_2(tuple, &parse->vers_2);
1341                 break;
1342         case CISTPL_ORG:
1343                 ret = parse_org(tuple, &parse->org);
1344                 break;
1345         case CISTPL_FORMAT:
1346         case CISTPL_FORMAT_A:
1347                 ret = parse_format(tuple, &parse->format);
1348                 break;
1349         case CISTPL_NO_LINK:
1350         case CISTPL_LINKTARGET:
1351                 ret = 0;
1352                 break;
1353         default:
1354                 ret = -EINVAL;
1355                 break;
1356         }
1357         if (ret)
1358                 pr_debug("parse_tuple failed %d\n", ret);
1359         return ret;
1360 }
1361 EXPORT_SYMBOL(pcmcia_parse_tuple);
1362
1363
1364 /**
1365  * pccard_validate_cis() - check whether card has a sensible CIS
1366  * @s:          the struct pcmcia_socket we are to check
1367  * @info:       returns the number of tuples in the (valid) CIS, or 0
1368  *
1369  * This tries to determine if a card has a sensible CIS.  In @info, it
1370  * returns the number of tuples in the CIS, or 0 if the CIS looks bad. The
1371  * checks include making sure several critical tuples are present and
1372  * valid; seeing if the total number of tuples is reasonable; and
1373  * looking for tuples that use reserved codes.
1374  *
1375  * The function returns 0 on success.
1376  */
1377 int pccard_validate_cis(struct pcmcia_socket *s, unsigned int *info)
1378 {
1379         tuple_t *tuple;
1380         cisparse_t *p;
1381         unsigned int count = 0;
1382         int ret, reserved, dev_ok = 0, ident_ok = 0;
1383
1384         if (!s)
1385                 return -EINVAL;
1386
1387         if (s->functions) {
1388                 WARN_ON(1);
1389                 return -EINVAL;
1390         }
1391
1392         /* We do not want to validate the CIS cache... */
1393         mutex_lock(&s->ops_mutex);
1394         destroy_cis_cache(s);
1395         mutex_unlock(&s->ops_mutex);
1396
1397         tuple = kmalloc(sizeof(*tuple), GFP_KERNEL);
1398         if (tuple == NULL) {
1399                 dev_warn(&s->dev, "no memory to validate CIS\n");
1400                 return -ENOMEM;
1401         }
1402         p = kmalloc(sizeof(*p), GFP_KERNEL);
1403         if (p == NULL) {
1404                 kfree(tuple);
1405                 dev_warn(&s->dev, "no memory to validate CIS\n");
1406                 return -ENOMEM;
1407         }
1408
1409         count = reserved = 0;
1410         tuple->DesiredTuple = RETURN_FIRST_TUPLE;
1411         tuple->Attributes = TUPLE_RETURN_COMMON;
1412         ret = pccard_get_first_tuple(s, BIND_FN_ALL, tuple);
1413         if (ret != 0)
1414                 goto done;
1415
1416         /* First tuple should be DEVICE; we should really have either that
1417            or a CFTABLE_ENTRY of some sort */
1418         if ((tuple->TupleCode == CISTPL_DEVICE) ||
1419             (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_CFTABLE_ENTRY, p)) ||
1420             (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_CFTABLE_ENTRY_CB, p)))
1421                 dev_ok++;
1422
1423         /* All cards should have a MANFID tuple, and/or a VERS_1 or VERS_2
1424            tuple, for card identification.  Certain old D-Link and Linksys
1425            cards have only a broken VERS_2 tuple; hence the bogus test. */
1426         if ((pccard_read_tuple(s, BIND_FN_ALL, CISTPL_MANFID, p) == 0) ||
1427             (pccard_read_tuple(s, BIND_FN_ALL, CISTPL_VERS_1, p) == 0) ||
1428             (pccard_read_tuple(s, BIND_FN_ALL, CISTPL_VERS_2, p) != -ENOSPC))
1429                 ident_ok++;
1430
1431         if (!dev_ok && !ident_ok)
1432                 goto done;
1433
1434         for (count = 1; count < MAX_TUPLES; count++) {
1435                 ret = pccard_get_next_tuple(s, BIND_FN_ALL, tuple);
1436                 if (ret != 0)
1437                         break;
1438                 if (((tuple->TupleCode > 0x23) && (tuple->TupleCode < 0x40)) ||
1439                     ((tuple->TupleCode > 0x47) && (tuple->TupleCode < 0x80)) ||
1440                     ((tuple->TupleCode > 0x90) && (tuple->TupleCode < 0xff)))
1441                         reserved++;
1442         }
1443         if ((count == MAX_TUPLES) || (reserved > 5) ||
1444                 ((!dev_ok || !ident_ok) && (count > 10)))
1445                 count = 0;
1446
1447         ret = 0;
1448
1449 done:
1450         /* invalidate CIS cache on failure */
1451         if (!dev_ok || !ident_ok || !count) {
1452                 mutex_lock(&s->ops_mutex);
1453                 destroy_cis_cache(s);
1454                 mutex_unlock(&s->ops_mutex);
1455                 ret = -EIO;
1456         }
1457
1458         if (info)
1459                 *info = count;
1460         kfree(tuple);
1461         kfree(p);
1462         return ret;
1463 }
1464
1465
1466 #define to_socket(_dev) container_of(_dev, struct pcmcia_socket, dev)
1467
1468 static ssize_t pccard_extract_cis(struct pcmcia_socket *s, char *buf,
1469                                   loff_t off, size_t count)
1470 {
1471         tuple_t tuple;
1472         int status, i;
1473         loff_t pointer = 0;
1474         ssize_t ret = 0;
1475         u_char *tuplebuffer;
1476         u_char *tempbuffer;
1477
1478         tuplebuffer = kmalloc(sizeof(u_char) * 256, GFP_KERNEL);
1479         if (!tuplebuffer)
1480                 return -ENOMEM;
1481
1482         tempbuffer = kmalloc(sizeof(u_char) * 258, GFP_KERNEL);
1483         if (!tempbuffer) {
1484                 ret = -ENOMEM;
1485                 goto free_tuple;
1486         }
1487
1488         memset(&tuple, 0, sizeof(tuple_t));
1489
1490         tuple.Attributes = TUPLE_RETURN_LINK | TUPLE_RETURN_COMMON;
1491         tuple.DesiredTuple = RETURN_FIRST_TUPLE;
1492         tuple.TupleOffset = 0;
1493
1494         status = pccard_get_first_tuple(s, BIND_FN_ALL, &tuple);
1495         while (!status) {
1496                 tuple.TupleData = tuplebuffer;
1497                 tuple.TupleDataMax = 255;
1498                 memset(tuplebuffer, 0, sizeof(u_char) * 255);
1499
1500                 status = pccard_get_tuple_data(s, &tuple);
1501                 if (status)
1502                         break;
1503
1504                 if (off < (pointer + 2 + tuple.TupleDataLen)) {
1505                         tempbuffer[0] = tuple.TupleCode & 0xff;
1506                         tempbuffer[1] = tuple.TupleLink & 0xff;
1507                         for (i = 0; i < tuple.TupleDataLen; i++)
1508                                 tempbuffer[i + 2] = tuplebuffer[i] & 0xff;
1509
1510                         for (i = 0; i < (2 + tuple.TupleDataLen); i++) {
1511                                 if (((i + pointer) >= off) &&
1512                                     (i + pointer) < (off + count)) {
1513                                         buf[ret] = tempbuffer[i];
1514                                         ret++;
1515                                 }
1516                         }
1517                 }
1518
1519                 pointer += 2 + tuple.TupleDataLen;
1520
1521                 if (pointer >= (off + count))
1522                         break;
1523
1524                 if (tuple.TupleCode == CISTPL_END)
1525                         break;
1526                 status = pccard_get_next_tuple(s, BIND_FN_ALL, &tuple);
1527         }
1528
1529         kfree(tempbuffer);
1530  free_tuple:
1531         kfree(tuplebuffer);
1532
1533         return ret;
1534 }
1535
1536
1537 static ssize_t pccard_show_cis(struct kobject *kobj,
1538                                struct bin_attribute *bin_attr,
1539                                char *buf, loff_t off, size_t count)
1540 {
1541         unsigned int size = 0x200;
1542
1543         if (off >= size)
1544                 count = 0;
1545         else {
1546                 struct pcmcia_socket *s;
1547                 unsigned int chains = 1;
1548
1549                 if (off + count > size)
1550                         count = size - off;
1551
1552                 s = to_socket(container_of(kobj, struct device, kobj));
1553
1554                 if (!(s->state & SOCKET_PRESENT))
1555                         return -ENODEV;
1556                 if (!s->functions && pccard_validate_cis(s, &chains))
1557                         return -EIO;
1558                 if (!chains)
1559                         return -ENODATA;
1560
1561                 count = pccard_extract_cis(s, buf, off, count);
1562         }
1563
1564         return count;
1565 }
1566
1567
1568 static ssize_t pccard_store_cis(struct kobject *kobj,
1569                                 struct bin_attribute *bin_attr,
1570                                 char *buf, loff_t off, size_t count)
1571 {
1572         struct pcmcia_socket *s;
1573         int error;
1574
1575         s = to_socket(container_of(kobj, struct device, kobj));
1576
1577         if (off)
1578                 return -EINVAL;
1579
1580         if (count >= CISTPL_MAX_CIS_SIZE)
1581                 return -EINVAL;
1582
1583         if (!(s->state & SOCKET_PRESENT))
1584                 return -ENODEV;
1585
1586         error = pcmcia_replace_cis(s, buf, count);
1587         if (error)
1588                 return -EIO;
1589
1590         pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
1591
1592         return count;
1593 }
1594
1595
1596 struct bin_attribute pccard_cis_attr = {
1597         .attr = { .name = "cis", .mode = S_IRUGO | S_IWUSR },
1598         .size = 0x200,
1599         .read = pccard_show_cis,
1600         .write = pccard_store_cis,
1601 };