pcmcia: pxa2xx/vpac270: free gpios on exist rather than requesting
[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/ss.h>
31 #include <pcmcia/cisreg.h>
32 #include <pcmcia/cistpl.h>
33 #include "cs_internal.h"
34
35 static const u_char mantissa[] = {
36     10, 12, 13, 15, 20, 25, 30, 35,
37     40, 45, 50, 55, 60, 70, 80, 90
38 };
39
40 static const u_int exponent[] = {
41     1, 10, 100, 1000, 10000, 100000, 1000000, 10000000
42 };
43
44 /* Convert an extended speed byte to a time in nanoseconds */
45 #define SPEED_CVT(v) \
46     (mantissa[(((v)>>3)&15)-1] * exponent[(v)&7] / 10)
47 /* Convert a power byte to a current in 0.1 microamps */
48 #define POWER_CVT(v) \
49     (mantissa[((v)>>3)&15] * exponent[(v)&7] / 10)
50 #define POWER_SCALE(v)          (exponent[(v)&7])
51
52 /* Upper limit on reasonable # of tuples */
53 #define MAX_TUPLES              200
54
55 /* Bits in IRQInfo1 field */
56 #define IRQ_INFO2_VALID         0x10
57
58 /* 16-bit CIS? */
59 static int cis_width;
60 module_param(cis_width, int, 0444);
61
62 void release_cis_mem(struct pcmcia_socket *s)
63 {
64         mutex_lock(&s->ops_mutex);
65         if (s->cis_mem.flags & MAP_ACTIVE) {
66                 s->cis_mem.flags &= ~MAP_ACTIVE;
67                 s->ops->set_mem_map(s, &s->cis_mem);
68                 if (s->cis_mem.res) {
69                         release_resource(s->cis_mem.res);
70                         kfree(s->cis_mem.res);
71                         s->cis_mem.res = NULL;
72                 }
73                 iounmap(s->cis_virt);
74                 s->cis_virt = NULL;
75         }
76         mutex_unlock(&s->ops_mutex);
77 }
78
79 /**
80  * set_cis_map() - map the card memory at "card_offset" into virtual space.
81  *
82  * If flags & MAP_ATTRIB, map the attribute space, otherwise
83  * map the memory space.
84  *
85  * Must be called with ops_mutex held.
86  */
87 static void __iomem *set_cis_map(struct pcmcia_socket *s,
88                                 unsigned int card_offset, unsigned int flags)
89 {
90         pccard_mem_map *mem = &s->cis_mem;
91         int ret;
92
93         if (!(s->features & SS_CAP_STATIC_MAP) && (mem->res == NULL)) {
94                 mem->res = pcmcia_find_mem_region(0, s->map_size,
95                                                 s->map_size, 0, s);
96                 if (mem->res == NULL) {
97                         dev_printk(KERN_NOTICE, &s->dev,
98                                    "cs: unable to map card memory!\n");
99                         return NULL;
100                 }
101                 s->cis_virt = NULL;
102         }
103
104         if (!(s->features & SS_CAP_STATIC_MAP) && (!s->cis_virt))
105                 s->cis_virt = ioremap(mem->res->start, s->map_size);
106
107         mem->card_start = card_offset;
108         mem->flags = flags;
109
110         ret = s->ops->set_mem_map(s, mem);
111         if (ret) {
112                 iounmap(s->cis_virt);
113                 s->cis_virt = NULL;
114                 return NULL;
115         }
116
117         if (s->features & SS_CAP_STATIC_MAP) {
118                 if (s->cis_virt)
119                         iounmap(s->cis_virt);
120                 s->cis_virt = ioremap(mem->static_start, s->map_size);
121         }
122
123         return s->cis_virt;
124 }
125
126
127 /* Bits in attr field */
128 #define IS_ATTR         1
129 #define IS_INDIRECT     8
130
131 /**
132  * pcmcia_read_cis_mem() - low-level function to read CIS memory
133  *
134  * must be called with ops_mutex held
135  */
136 int pcmcia_read_cis_mem(struct pcmcia_socket *s, int attr, u_int addr,
137                  u_int len, void *ptr)
138 {
139         void __iomem *sys, *end;
140         unsigned char *buf = ptr;
141
142         dev_dbg(&s->dev, "pcmcia_read_cis_mem(%d, %#x, %u)\n", attr, addr, len);
143
144         if (attr & IS_INDIRECT) {
145                 /* Indirect accesses use a bunch of special registers at fixed
146                    locations in common memory */
147                 u_char flags = ICTRL0_COMMON|ICTRL0_AUTOINC|ICTRL0_BYTEGRAN;
148                 if (attr & IS_ATTR) {
149                         addr *= 2;
150                         flags = ICTRL0_AUTOINC;
151                 }
152
153                 sys = set_cis_map(s, 0, MAP_ACTIVE |
154                                 ((cis_width) ? MAP_16BIT : 0));
155                 if (!sys) {
156                         dev_dbg(&s->dev, "could not map memory\n");
157                         memset(ptr, 0xff, len);
158                         return -1;
159                 }
160
161                 writeb(flags, sys+CISREG_ICTRL0);
162                 writeb(addr & 0xff, sys+CISREG_IADDR0);
163                 writeb((addr>>8) & 0xff, sys+CISREG_IADDR1);
164                 writeb((addr>>16) & 0xff, sys+CISREG_IADDR2);
165                 writeb((addr>>24) & 0xff, sys+CISREG_IADDR3);
166                 for ( ; len > 0; len--, buf++)
167                         *buf = readb(sys+CISREG_IDATA0);
168         } else {
169                 u_int inc = 1, card_offset, flags;
170
171                 if (addr > CISTPL_MAX_CIS_SIZE)
172                         dev_dbg(&s->dev,
173                                 "attempt to read CIS mem at addr %#x", addr);
174
175                 flags = MAP_ACTIVE | ((cis_width) ? MAP_16BIT : 0);
176                 if (attr) {
177                         flags |= MAP_ATTRIB;
178                         inc++;
179                         addr *= 2;
180                 }
181
182                 card_offset = addr & ~(s->map_size-1);
183                 while (len) {
184                         sys = set_cis_map(s, card_offset, flags);
185                         if (!sys) {
186                                 dev_dbg(&s->dev, "could not map memory\n");
187                                 memset(ptr, 0xff, len);
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         dev_dbg(&s->dev, "  %#2.2x %#2.2x %#2.2x %#2.2x ...\n",
202                 *(u_char *)(ptr+0), *(u_char *)(ptr+1),
203                 *(u_char *)(ptr+2), *(u_char *)(ptr+3));
204         return 0;
205 }
206
207
208 /**
209  * pcmcia_write_cis_mem() - low-level function to write CIS memory
210  *
211  * Probably only useful for writing one-byte registers. Must be called
212  * with ops_mutex held.
213  */
214 int 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         if (attr & IS_INDIRECT) {
224                 /* Indirect accesses use a bunch of special registers at fixed
225                    locations in common memory */
226                 u_char flags = ICTRL0_COMMON|ICTRL0_AUTOINC|ICTRL0_BYTEGRAN;
227                 if (attr & IS_ATTR) {
228                         addr *= 2;
229                         flags = ICTRL0_AUTOINC;
230                 }
231
232                 sys = set_cis_map(s, 0, MAP_ACTIVE |
233                                 ((cis_width) ? MAP_16BIT : 0));
234                 if (!sys) {
235                         dev_dbg(&s->dev, "could not map memory\n");
236                         return -EINVAL;
237                 }
238
239                 writeb(flags, sys+CISREG_ICTRL0);
240                 writeb(addr & 0xff, sys+CISREG_IADDR0);
241                 writeb((addr>>8) & 0xff, sys+CISREG_IADDR1);
242                 writeb((addr>>16) & 0xff, sys+CISREG_IADDR2);
243                 writeb((addr>>24) & 0xff, sys+CISREG_IADDR3);
244                 for ( ; len > 0; len--, buf++)
245                         writeb(*buf, sys+CISREG_IDATA0);
246         } else {
247                 u_int inc = 1, card_offset, flags;
248
249                 flags = MAP_ACTIVE | ((cis_width) ? MAP_16BIT : 0);
250                 if (attr & IS_ATTR) {
251                         flags |= MAP_ATTRIB;
252                         inc++;
253                         addr *= 2;
254                 }
255
256                 card_offset = addr & ~(s->map_size-1);
257                 while (len) {
258                         sys = set_cis_map(s, card_offset, flags);
259                         if (!sys) {
260                                 dev_dbg(&s->dev, "could not map memory\n");
261                                 return -EINVAL;
262                         }
263
264                         end = sys + s->map_size;
265                         sys = sys + (addr & (s->map_size-1));
266                         for ( ; len > 0; len--, buf++, sys += inc) {
267                                 if (sys == end)
268                                         break;
269                                 writeb(*buf, sys);
270                         }
271                         card_offset += s->map_size;
272                         addr = 0;
273                 }
274         }
275         return 0;
276 }
277
278
279 /**
280  * read_cis_cache() - read CIS memory or its associated cache
281  *
282  * This is a wrapper around read_cis_mem, with the same interface,
283  * but which caches information, for cards whose CIS may not be
284  * readable all the time.
285  */
286 static int read_cis_cache(struct pcmcia_socket *s, int attr, u_int addr,
287                         size_t len, void *ptr)
288 {
289         struct cis_cache_entry *cis;
290         int ret = 0;
291
292         if (s->state & SOCKET_CARDBUS)
293                 return -EINVAL;
294
295         mutex_lock(&s->ops_mutex);
296         if (s->fake_cis) {
297                 if (s->fake_cis_len >= addr+len)
298                         memcpy(ptr, s->fake_cis+addr, len);
299                 else {
300                         memset(ptr, 0xff, len);
301                         ret = -EINVAL;
302                 }
303                 mutex_unlock(&s->ops_mutex);
304                 return ret;
305         }
306
307         list_for_each_entry(cis, &s->cis_cache, node) {
308                 if (cis->addr == addr && cis->len == len && cis->attr == attr) {
309                         memcpy(ptr, cis->cache, len);
310                         mutex_unlock(&s->ops_mutex);
311                         return 0;
312                 }
313         }
314
315         ret = pcmcia_read_cis_mem(s, attr, addr, len, ptr);
316
317         if (ret == 0) {
318                 /* Copy data into the cache */
319                 cis = kmalloc(sizeof(struct cis_cache_entry) + len, GFP_KERNEL);
320                 if (cis) {
321                         cis->addr = addr;
322                         cis->len = len;
323                         cis->attr = attr;
324                         memcpy(cis->cache, ptr, len);
325                         list_add(&cis->node, &s->cis_cache);
326                 }
327         }
328         mutex_unlock(&s->ops_mutex);
329
330         return ret;
331 }
332
333 static void
334 remove_cis_cache(struct pcmcia_socket *s, int attr, u_int addr, u_int len)
335 {
336         struct cis_cache_entry *cis;
337
338         mutex_lock(&s->ops_mutex);
339         list_for_each_entry(cis, &s->cis_cache, node)
340                 if (cis->addr == addr && cis->len == len && cis->attr == attr) {
341                         list_del(&cis->node);
342                         kfree(cis);
343                         break;
344                 }
345         mutex_unlock(&s->ops_mutex);
346 }
347
348 /**
349  * destroy_cis_cache() - destroy the CIS cache
350  * @s:          pcmcia_socket for which CIS cache shall be destroyed
351  *
352  * This destroys the CIS cache but keeps any fake CIS alive. Must be
353  * called with ops_mutex held.
354  */
355 void destroy_cis_cache(struct pcmcia_socket *s)
356 {
357         struct list_head *l, *n;
358         struct cis_cache_entry *cis;
359
360         list_for_each_safe(l, n, &s->cis_cache) {
361                 cis = list_entry(l, struct cis_cache_entry, node);
362                 list_del(&cis->node);
363                 kfree(cis);
364         }
365 }
366
367 /**
368  * verify_cis_cache() - does the CIS match what is in the CIS cache?
369  */
370 int verify_cis_cache(struct pcmcia_socket *s)
371 {
372         struct cis_cache_entry *cis;
373         char *buf;
374         int ret;
375
376         if (s->state & SOCKET_CARDBUS)
377                 return -EINVAL;
378
379         buf = kmalloc(256, GFP_KERNEL);
380         if (buf == NULL) {
381                 dev_printk(KERN_WARNING, &s->dev,
382                            "no memory for verifying CIS\n");
383                 return -ENOMEM;
384         }
385         mutex_lock(&s->ops_mutex);
386         list_for_each_entry(cis, &s->cis_cache, node) {
387                 int len = cis->len;
388
389                 if (len > 256)
390                         len = 256;
391
392                 ret = pcmcia_read_cis_mem(s, cis->attr, cis->addr, len, buf);
393                 if (ret || memcmp(buf, cis->cache, len) != 0) {
394                         kfree(buf);
395                         mutex_unlock(&s->ops_mutex);
396                         return -1;
397                 }
398         }
399         kfree(buf);
400         mutex_unlock(&s->ops_mutex);
401         return 0;
402 }
403
404 /**
405  * pcmcia_replace_cis() - use a replacement CIS instead of the card's CIS
406  *
407  * For really bad cards, we provide a facility for uploading a
408  * replacement CIS.
409  */
410 int pcmcia_replace_cis(struct pcmcia_socket *s,
411                        const u8 *data, const size_t len)
412 {
413         if (len > CISTPL_MAX_CIS_SIZE) {
414                 dev_printk(KERN_WARNING, &s->dev, "replacement CIS too big\n");
415                 return -EINVAL;
416         }
417         mutex_lock(&s->ops_mutex);
418         kfree(s->fake_cis);
419         s->fake_cis = kmalloc(len, GFP_KERNEL);
420         if (s->fake_cis == NULL) {
421                 dev_printk(KERN_WARNING, &s->dev, "no memory to replace CIS\n");
422                 mutex_unlock(&s->ops_mutex);
423                 return -ENOMEM;
424         }
425         s->fake_cis_len = len;
426         memcpy(s->fake_cis, data, len);
427         dev_info(&s->dev, "Using replacement CIS\n");
428         mutex_unlock(&s->ops_mutex);
429         return 0;
430 }
431
432 /* The high-level CIS tuple services */
433
434 typedef struct tuple_flags {
435         u_int           link_space:4;
436         u_int           has_link:1;
437         u_int           mfc_fn:3;
438         u_int           space:4;
439 } tuple_flags;
440
441 #define LINK_SPACE(f)   (((tuple_flags *)(&(f)))->link_space)
442 #define HAS_LINK(f)     (((tuple_flags *)(&(f)))->has_link)
443 #define MFC_FN(f)       (((tuple_flags *)(&(f)))->mfc_fn)
444 #define SPACE(f)        (((tuple_flags *)(&(f)))->space)
445
446 int pccard_get_first_tuple(struct pcmcia_socket *s, unsigned int function,
447                         tuple_t *tuple)
448 {
449         if (!s)
450                 return -EINVAL;
451
452         if (!(s->state & SOCKET_PRESENT) || (s->state & SOCKET_CARDBUS))
453                 return -ENODEV;
454         tuple->TupleLink = tuple->Flags = 0;
455
456         /* Assume presence of a LONGLINK_C to address 0 */
457         tuple->CISOffset = tuple->LinkOffset = 0;
458         SPACE(tuple->Flags) = HAS_LINK(tuple->Flags) = 1;
459
460         if ((s->functions > 1) && !(tuple->Attributes & TUPLE_RETURN_COMMON)) {
461                 cisdata_t req = tuple->DesiredTuple;
462                 tuple->DesiredTuple = CISTPL_LONGLINK_MFC;
463                 if (pccard_get_next_tuple(s, function, tuple) == 0) {
464                         tuple->DesiredTuple = CISTPL_LINKTARGET;
465                         if (pccard_get_next_tuple(s, function, tuple) != 0)
466                                 return -ENOSPC;
467                 } else
468                         tuple->CISOffset = tuple->TupleLink = 0;
469                 tuple->DesiredTuple = req;
470         }
471         return pccard_get_next_tuple(s, function, tuple);
472 }
473
474 static int follow_link(struct pcmcia_socket *s, tuple_t *tuple)
475 {
476         u_char link[5];
477         u_int ofs;
478         int ret;
479
480         if (MFC_FN(tuple->Flags)) {
481                 /* Get indirect link from the MFC tuple */
482                 ret = read_cis_cache(s, LINK_SPACE(tuple->Flags),
483                                 tuple->LinkOffset, 5, link);
484                 if (ret)
485                         return -1;
486                 ofs = get_unaligned_le32(link + 1);
487                 SPACE(tuple->Flags) = (link[0] == CISTPL_MFC_ATTR);
488                 /* Move to the next indirect link */
489                 tuple->LinkOffset += 5;
490                 MFC_FN(tuple->Flags)--;
491         } else if (HAS_LINK(tuple->Flags)) {
492                 ofs = tuple->LinkOffset;
493                 SPACE(tuple->Flags) = LINK_SPACE(tuple->Flags);
494                 HAS_LINK(tuple->Flags) = 0;
495         } else
496                 return -1;
497
498         if (SPACE(tuple->Flags)) {
499                 /* This is ugly, but a common CIS error is to code the long
500                    link offset incorrectly, so we check the right spot... */
501                 ret = read_cis_cache(s, SPACE(tuple->Flags), ofs, 5, link);
502                 if (ret)
503                         return -1;
504                 if ((link[0] == CISTPL_LINKTARGET) && (link[1] >= 3) &&
505                         (strncmp(link+2, "CIS", 3) == 0))
506                         return ofs;
507                 remove_cis_cache(s, SPACE(tuple->Flags), ofs, 5);
508                 /* Then, we try the wrong spot... */
509                 ofs = ofs >> 1;
510         }
511         ret = read_cis_cache(s, SPACE(tuple->Flags), ofs, 5, link);
512         if (ret)
513                 return -1;
514         if ((link[0] == CISTPL_LINKTARGET) && (link[1] >= 3) &&
515                 (strncmp(link+2, "CIS", 3) == 0))
516                 return ofs;
517         remove_cis_cache(s, SPACE(tuple->Flags), ofs, 5);
518         return -1;
519 }
520
521 int pccard_get_next_tuple(struct pcmcia_socket *s, unsigned int function,
522                         tuple_t *tuple)
523 {
524         u_char link[2], tmp;
525         int ofs, i, attr;
526         int ret;
527
528         if (!s)
529                 return -EINVAL;
530         if (!(s->state & SOCKET_PRESENT) || (s->state & SOCKET_CARDBUS))
531                 return -ENODEV;
532
533         link[1] = tuple->TupleLink;
534         ofs = tuple->CISOffset + tuple->TupleLink;
535         attr = SPACE(tuple->Flags);
536
537         for (i = 0; i < MAX_TUPLES; i++) {
538                 if (link[1] == 0xff)
539                         link[0] = CISTPL_END;
540                 else {
541                         ret = read_cis_cache(s, attr, ofs, 2, link);
542                         if (ret)
543                                 return -1;
544                         if (link[0] == CISTPL_NULL) {
545                                 ofs++;
546                                 continue;
547                         }
548                 }
549
550                 /* End of chain?  Follow long link if possible */
551                 if (link[0] == CISTPL_END) {
552                         ofs = follow_link(s, tuple);
553                         if (ofs < 0)
554                                 return -ENOSPC;
555                         attr = SPACE(tuple->Flags);
556                         ret = read_cis_cache(s, attr, ofs, 2, link);
557                         if (ret)
558                                 return -1;
559                 }
560
561                 /* Is this a link tuple?  Make a note of it */
562                 if ((link[0] == CISTPL_LONGLINK_A) ||
563                         (link[0] == CISTPL_LONGLINK_C) ||
564                         (link[0] == CISTPL_LONGLINK_MFC) ||
565                         (link[0] == CISTPL_LINKTARGET) ||
566                         (link[0] == CISTPL_INDIRECT) ||
567                         (link[0] == CISTPL_NO_LINK)) {
568                         switch (link[0]) {
569                         case CISTPL_LONGLINK_A:
570                                 HAS_LINK(tuple->Flags) = 1;
571                                 LINK_SPACE(tuple->Flags) = attr | IS_ATTR;
572                                 ret = read_cis_cache(s, attr, ofs+2, 4,
573                                                 &tuple->LinkOffset);
574                                 if (ret)
575                                         return -1;
576                                 break;
577                         case CISTPL_LONGLINK_C:
578                                 HAS_LINK(tuple->Flags) = 1;
579                                 LINK_SPACE(tuple->Flags) = attr & ~IS_ATTR;
580                                 ret = read_cis_cache(s, attr, ofs+2, 4,
581                                                 &tuple->LinkOffset);
582                                 if (ret)
583                                         return -1;
584                                 break;
585                         case CISTPL_INDIRECT:
586                                 HAS_LINK(tuple->Flags) = 1;
587                                 LINK_SPACE(tuple->Flags) = IS_ATTR |
588                                         IS_INDIRECT;
589                                 tuple->LinkOffset = 0;
590                                 break;
591                         case CISTPL_LONGLINK_MFC:
592                                 tuple->LinkOffset = ofs + 3;
593                                 LINK_SPACE(tuple->Flags) = attr;
594                                 if (function == BIND_FN_ALL) {
595                                         /* Follow all the MFC links */
596                                         ret = read_cis_cache(s, attr, ofs+2,
597                                                         1, &tmp);
598                                         if (ret)
599                                                 return -1;
600                                         MFC_FN(tuple->Flags) = tmp;
601                                 } else {
602                                         /* Follow exactly one of the links */
603                                         MFC_FN(tuple->Flags) = 1;
604                                         tuple->LinkOffset += function * 5;
605                                 }
606                                 break;
607                         case CISTPL_NO_LINK:
608                                 HAS_LINK(tuple->Flags) = 0;
609                                 break;
610                         }
611                         if ((tuple->Attributes & TUPLE_RETURN_LINK) &&
612                                 (tuple->DesiredTuple == RETURN_FIRST_TUPLE))
613                                 break;
614                 } else
615                         if (tuple->DesiredTuple == RETURN_FIRST_TUPLE)
616                                 break;
617
618                 if (link[0] == tuple->DesiredTuple)
619                         break;
620                 ofs += link[1] + 2;
621         }
622         if (i == MAX_TUPLES) {
623                 dev_dbg(&s->dev, "cs: overrun in pcmcia_get_next_tuple\n");
624                 return -ENOSPC;
625         }
626
627         tuple->TupleCode = link[0];
628         tuple->TupleLink = link[1];
629         tuple->CISOffset = ofs + 2;
630         return 0;
631 }
632
633 int pccard_get_tuple_data(struct pcmcia_socket *s, tuple_t *tuple)
634 {
635         u_int len;
636         int ret;
637
638         if (!s)
639                 return -EINVAL;
640
641         if (tuple->TupleLink < tuple->TupleOffset)
642                 return -ENOSPC;
643         len = tuple->TupleLink - tuple->TupleOffset;
644         tuple->TupleDataLen = tuple->TupleLink;
645         if (len == 0)
646                 return 0;
647         ret = read_cis_cache(s, SPACE(tuple->Flags),
648                         tuple->CISOffset + tuple->TupleOffset,
649                         min(len, (u_int) tuple->TupleDataMax),
650                         tuple->TupleData);
651         if (ret)
652                 return -1;
653         return 0;
654 }
655
656
657 /* Parsing routines for individual tuples */
658
659 static int parse_device(tuple_t *tuple, cistpl_device_t *device)
660 {
661         int i;
662         u_char scale;
663         u_char *p, *q;
664
665         p = (u_char *)tuple->TupleData;
666         q = p + tuple->TupleDataLen;
667
668         device->ndev = 0;
669         for (i = 0; i < CISTPL_MAX_DEVICES; i++) {
670
671                 if (*p == 0xff)
672                         break;
673                 device->dev[i].type = (*p >> 4);
674                 device->dev[i].wp = (*p & 0x08) ? 1 : 0;
675                 switch (*p & 0x07) {
676                 case 0:
677                         device->dev[i].speed = 0;
678                         break;
679                 case 1:
680                         device->dev[i].speed = 250;
681                         break;
682                 case 2:
683                         device->dev[i].speed = 200;
684                         break;
685                 case 3:
686                         device->dev[i].speed = 150;
687                         break;
688                 case 4:
689                         device->dev[i].speed = 100;
690                         break;
691                 case 7:
692                         if (++p == q)
693                                 return -EINVAL;
694                         device->dev[i].speed = SPEED_CVT(*p);
695                         while (*p & 0x80)
696                                 if (++p == q)
697                                         return -EINVAL;
698                         break;
699                 default:
700                         return -EINVAL;
701                 }
702
703                 if (++p == q)
704                         return -EINVAL;
705                 if (*p == 0xff)
706                         break;
707                 scale = *p & 7;
708                 if (scale == 7)
709                         return -EINVAL;
710                 device->dev[i].size = ((*p >> 3) + 1) * (512 << (scale*2));
711                 device->ndev++;
712                 if (++p == q)
713                         break;
714         }
715
716         return 0;
717 }
718
719
720 static int parse_checksum(tuple_t *tuple, cistpl_checksum_t *csum)
721 {
722         u_char *p;
723         if (tuple->TupleDataLen < 5)
724                 return -EINVAL;
725         p = (u_char *) tuple->TupleData;
726         csum->addr = tuple->CISOffset + get_unaligned_le16(p) - 2;
727         csum->len = get_unaligned_le16(p + 2);
728         csum->sum = *(p + 4);
729         return 0;
730 }
731
732
733 static int parse_longlink(tuple_t *tuple, cistpl_longlink_t *link)
734 {
735         if (tuple->TupleDataLen < 4)
736                 return -EINVAL;
737         link->addr = get_unaligned_le32(tuple->TupleData);
738         return 0;
739 }
740
741
742 static int parse_longlink_mfc(tuple_t *tuple, cistpl_longlink_mfc_t *link)
743 {
744         u_char *p;
745         int i;
746
747         p = (u_char *)tuple->TupleData;
748
749         link->nfn = *p; p++;
750         if (tuple->TupleDataLen <= link->nfn*5)
751                 return -EINVAL;
752         for (i = 0; i < link->nfn; i++) {
753                 link->fn[i].space = *p; p++;
754                 link->fn[i].addr = get_unaligned_le32(p);
755                 p += 4;
756         }
757         return 0;
758 }
759
760
761 static int parse_strings(u_char *p, u_char *q, int max,
762                          char *s, u_char *ofs, u_char *found)
763 {
764         int i, j, ns;
765
766         if (p == q)
767                 return -EINVAL;
768         ns = 0; j = 0;
769         for (i = 0; i < max; i++) {
770                 if (*p == 0xff)
771                         break;
772                 ofs[i] = j;
773                 ns++;
774                 for (;;) {
775                         s[j++] = (*p == 0xff) ? '\0' : *p;
776                         if ((*p == '\0') || (*p == 0xff))
777                                 break;
778                         if (++p == q)
779                                 return -EINVAL;
780                 }
781                 if ((*p == 0xff) || (++p == q))
782                         break;
783         }
784         if (found) {
785                 *found = ns;
786                 return 0;
787         }
788
789         return (ns == max) ? 0 : -EINVAL;
790 }
791
792
793 static int parse_vers_1(tuple_t *tuple, cistpl_vers_1_t *vers_1)
794 {
795         u_char *p, *q;
796
797         p = (u_char *)tuple->TupleData;
798         q = p + tuple->TupleDataLen;
799
800         vers_1->major = *p; p++;
801         vers_1->minor = *p; p++;
802         if (p >= q)
803                 return -EINVAL;
804
805         return parse_strings(p, q, CISTPL_VERS_1_MAX_PROD_STRINGS,
806                         vers_1->str, vers_1->ofs, &vers_1->ns);
807 }
808
809
810 static int parse_altstr(tuple_t *tuple, cistpl_altstr_t *altstr)
811 {
812         u_char *p, *q;
813
814         p = (u_char *)tuple->TupleData;
815         q = p + tuple->TupleDataLen;
816
817         return parse_strings(p, q, CISTPL_MAX_ALTSTR_STRINGS,
818                         altstr->str, altstr->ofs, &altstr->ns);
819 }
820
821
822 static int parse_jedec(tuple_t *tuple, cistpl_jedec_t *jedec)
823 {
824         u_char *p, *q;
825         int nid;
826
827         p = (u_char *)tuple->TupleData;
828         q = p + tuple->TupleDataLen;
829
830         for (nid = 0; nid < CISTPL_MAX_DEVICES; nid++) {
831                 if (p > q-2)
832                         break;
833                 jedec->id[nid].mfr = p[0];
834                 jedec->id[nid].info = p[1];
835                 p += 2;
836         }
837         jedec->nid = nid;
838         return 0;
839 }
840
841
842 static int parse_manfid(tuple_t *tuple, cistpl_manfid_t *m)
843 {
844         if (tuple->TupleDataLen < 4)
845                 return -EINVAL;
846         m->manf = get_unaligned_le16(tuple->TupleData);
847         m->card = get_unaligned_le16(tuple->TupleData + 2);
848         return 0;
849 }
850
851
852 static int parse_funcid(tuple_t *tuple, cistpl_funcid_t *f)
853 {
854         u_char *p;
855         if (tuple->TupleDataLen < 2)
856                 return -EINVAL;
857         p = (u_char *)tuple->TupleData;
858         f->func = p[0];
859         f->sysinit = p[1];
860         return 0;
861 }
862
863
864 static int parse_funce(tuple_t *tuple, cistpl_funce_t *f)
865 {
866         u_char *p;
867         int i;
868         if (tuple->TupleDataLen < 1)
869                 return -EINVAL;
870         p = (u_char *)tuple->TupleData;
871         f->type = p[0];
872         for (i = 1; i < tuple->TupleDataLen; i++)
873                 f->data[i-1] = p[i];
874         return 0;
875 }
876
877
878 static int parse_config(tuple_t *tuple, cistpl_config_t *config)
879 {
880         int rasz, rmsz, i;
881         u_char *p;
882
883         p = (u_char *)tuple->TupleData;
884         rasz = *p & 0x03;
885         rmsz = (*p & 0x3c) >> 2;
886         if (tuple->TupleDataLen < rasz+rmsz+4)
887                 return -EINVAL;
888         config->last_idx = *(++p);
889         p++;
890         config->base = 0;
891         for (i = 0; i <= rasz; i++)
892                 config->base += p[i] << (8*i);
893         p += rasz+1;
894         for (i = 0; i < 4; i++)
895                 config->rmask[i] = 0;
896         for (i = 0; i <= rmsz; i++)
897                 config->rmask[i>>2] += p[i] << (8*(i%4));
898         config->subtuples = tuple->TupleDataLen - (rasz+rmsz+4);
899         return 0;
900 }
901
902 /* The following routines are all used to parse the nightmarish
903  * config table entries.
904  */
905
906 static u_char *parse_power(u_char *p, u_char *q, cistpl_power_t *pwr)
907 {
908         int i;
909         u_int scale;
910
911         if (p == q)
912                 return NULL;
913         pwr->present = *p;
914         pwr->flags = 0;
915         p++;
916         for (i = 0; i < 7; i++)
917                 if (pwr->present & (1<<i)) {
918                         if (p == q)
919                                 return NULL;
920                         pwr->param[i] = POWER_CVT(*p);
921                         scale = POWER_SCALE(*p);
922                         while (*p & 0x80) {
923                                 if (++p == q)
924                                         return NULL;
925                                 if ((*p & 0x7f) < 100)
926                                         pwr->param[i] +=
927                                                 (*p & 0x7f) * scale / 100;
928                                 else if (*p == 0x7d)
929                                         pwr->flags |= CISTPL_POWER_HIGHZ_OK;
930                                 else if (*p == 0x7e)
931                                         pwr->param[i] = 0;
932                                 else if (*p == 0x7f)
933                                         pwr->flags |= CISTPL_POWER_HIGHZ_REQ;
934                                 else
935                                         return NULL;
936                         }
937                         p++;
938                 }
939         return p;
940 }
941
942
943 static u_char *parse_timing(u_char *p, u_char *q, cistpl_timing_t *timing)
944 {
945         u_char scale;
946
947         if (p == q)
948                 return NULL;
949         scale = *p;
950         if ((scale & 3) != 3) {
951                 if (++p == q)
952                         return NULL;
953                 timing->wait = SPEED_CVT(*p);
954                 timing->waitscale = exponent[scale & 3];
955         } else
956                 timing->wait = 0;
957         scale >>= 2;
958         if ((scale & 7) != 7) {
959                 if (++p == q)
960                         return NULL;
961                 timing->ready = SPEED_CVT(*p);
962                 timing->rdyscale = exponent[scale & 7];
963         } else
964                 timing->ready = 0;
965         scale >>= 3;
966         if (scale != 7) {
967                 if (++p == q)
968                         return NULL;
969                 timing->reserved = SPEED_CVT(*p);
970                 timing->rsvscale = exponent[scale];
971         } else
972                 timing->reserved = 0;
973         p++;
974         return p;
975 }
976
977
978 static u_char *parse_io(u_char *p, u_char *q, cistpl_io_t *io)
979 {
980         int i, j, bsz, lsz;
981
982         if (p == q)
983                 return NULL;
984         io->flags = *p;
985
986         if (!(*p & 0x80)) {
987                 io->nwin = 1;
988                 io->win[0].base = 0;
989                 io->win[0].len = (1 << (io->flags & CISTPL_IO_LINES_MASK));
990                 return p+1;
991         }
992
993         if (++p == q)
994                 return NULL;
995         io->nwin = (*p & 0x0f) + 1;
996         bsz = (*p & 0x30) >> 4;
997         if (bsz == 3)
998                 bsz++;
999         lsz = (*p & 0xc0) >> 6;
1000         if (lsz == 3)
1001                 lsz++;
1002         p++;
1003
1004         for (i = 0; i < io->nwin; i++) {
1005                 io->win[i].base = 0;
1006                 io->win[i].len = 1;
1007                 for (j = 0; j < bsz; j++, p++) {
1008                         if (p == q)
1009                                 return NULL;
1010                         io->win[i].base += *p << (j*8);
1011                 }
1012                 for (j = 0; j < lsz; j++, p++) {
1013                         if (p == q)
1014                                 return NULL;
1015                         io->win[i].len += *p << (j*8);
1016                 }
1017         }
1018         return p;
1019 }
1020
1021
1022 static u_char *parse_mem(u_char *p, u_char *q, cistpl_mem_t *mem)
1023 {
1024         int i, j, asz, lsz, has_ha;
1025         u_int len, ca, ha;
1026
1027         if (p == q)
1028                 return NULL;
1029
1030         mem->nwin = (*p & 0x07) + 1;
1031         lsz = (*p & 0x18) >> 3;
1032         asz = (*p & 0x60) >> 5;
1033         has_ha = (*p & 0x80);
1034         if (++p == q)
1035                 return NULL;
1036
1037         for (i = 0; i < mem->nwin; i++) {
1038                 len = ca = ha = 0;
1039                 for (j = 0; j < lsz; j++, p++) {
1040                         if (p == q)
1041                                 return NULL;
1042                         len += *p << (j*8);
1043                 }
1044                 for (j = 0; j < asz; j++, p++) {
1045                         if (p == q)
1046                                 return NULL;
1047                         ca += *p << (j*8);
1048                 }
1049                 if (has_ha)
1050                         for (j = 0; j < asz; j++, p++) {
1051                                 if (p == q)
1052                                         return NULL;
1053                                 ha += *p << (j*8);
1054                         }
1055                 mem->win[i].len = len << 8;
1056                 mem->win[i].card_addr = ca << 8;
1057                 mem->win[i].host_addr = ha << 8;
1058         }
1059         return p;
1060 }
1061
1062
1063 static u_char *parse_irq(u_char *p, u_char *q, cistpl_irq_t *irq)
1064 {
1065         if (p == q)
1066                 return NULL;
1067         irq->IRQInfo1 = *p; p++;
1068         if (irq->IRQInfo1 & IRQ_INFO2_VALID) {
1069                 if (p+2 > q)
1070                         return NULL;
1071                 irq->IRQInfo2 = (p[1]<<8) + p[0];
1072                 p += 2;
1073         }
1074         return p;
1075 }
1076
1077
1078 static int parse_cftable_entry(tuple_t *tuple,
1079                                cistpl_cftable_entry_t *entry)
1080 {
1081         u_char *p, *q, features;
1082
1083         p = tuple->TupleData;
1084         q = p + tuple->TupleDataLen;
1085         entry->index = *p & 0x3f;
1086         entry->flags = 0;
1087         if (*p & 0x40)
1088                 entry->flags |= CISTPL_CFTABLE_DEFAULT;
1089         if (*p & 0x80) {
1090                 if (++p == q)
1091                         return -EINVAL;
1092                 if (*p & 0x10)
1093                         entry->flags |= CISTPL_CFTABLE_BVDS;
1094                 if (*p & 0x20)
1095                         entry->flags |= CISTPL_CFTABLE_WP;
1096                 if (*p & 0x40)
1097                         entry->flags |= CISTPL_CFTABLE_RDYBSY;
1098                 if (*p & 0x80)
1099                         entry->flags |= CISTPL_CFTABLE_MWAIT;
1100                 entry->interface = *p & 0x0f;
1101         } else
1102                 entry->interface = 0;
1103
1104         /* Process optional features */
1105         if (++p == q)
1106                 return -EINVAL;
1107         features = *p; p++;
1108
1109         /* Power options */
1110         if ((features & 3) > 0) {
1111                 p = parse_power(p, q, &entry->vcc);
1112                 if (p == NULL)
1113                         return -EINVAL;
1114         } else
1115                 entry->vcc.present = 0;
1116         if ((features & 3) > 1) {
1117                 p = parse_power(p, q, &entry->vpp1);
1118                 if (p == NULL)
1119                         return -EINVAL;
1120         } else
1121                 entry->vpp1.present = 0;
1122         if ((features & 3) > 2) {
1123                 p = parse_power(p, q, &entry->vpp2);
1124                 if (p == NULL)
1125                         return -EINVAL;
1126         } else
1127                 entry->vpp2.present = 0;
1128
1129         /* Timing options */
1130         if (features & 0x04) {
1131                 p = parse_timing(p, q, &entry->timing);
1132                 if (p == NULL)
1133                         return -EINVAL;
1134         } else {
1135                 entry->timing.wait = 0;
1136                 entry->timing.ready = 0;
1137                 entry->timing.reserved = 0;
1138         }
1139
1140         /* I/O window options */
1141         if (features & 0x08) {
1142                 p = parse_io(p, q, &entry->io);
1143                 if (p == NULL)
1144                         return -EINVAL;
1145         } else
1146                 entry->io.nwin = 0;
1147
1148         /* Interrupt options */
1149         if (features & 0x10) {
1150                 p = parse_irq(p, q, &entry->irq);
1151                 if (p == NULL)
1152                         return -EINVAL;
1153         } else
1154                 entry->irq.IRQInfo1 = 0;
1155
1156         switch (features & 0x60) {
1157         case 0x00:
1158                 entry->mem.nwin = 0;
1159                 break;
1160         case 0x20:
1161                 entry->mem.nwin = 1;
1162                 entry->mem.win[0].len = get_unaligned_le16(p) << 8;
1163                 entry->mem.win[0].card_addr = 0;
1164                 entry->mem.win[0].host_addr = 0;
1165                 p += 2;
1166                 if (p > q)
1167                         return -EINVAL;
1168                 break;
1169         case 0x40:
1170                 entry->mem.nwin = 1;
1171                 entry->mem.win[0].len = get_unaligned_le16(p) << 8;
1172                 entry->mem.win[0].card_addr = get_unaligned_le16(p + 2) << 8;
1173                 entry->mem.win[0].host_addr = 0;
1174                 p += 4;
1175                 if (p > q)
1176                         return -EINVAL;
1177                 break;
1178         case 0x60:
1179                 p = parse_mem(p, q, &entry->mem);
1180                 if (p == NULL)
1181                         return -EINVAL;
1182                 break;
1183         }
1184
1185         /* Misc features */
1186         if (features & 0x80) {
1187                 if (p == q)
1188                         return -EINVAL;
1189                 entry->flags |= (*p << 8);
1190                 while (*p & 0x80)
1191                         if (++p == q)
1192                                 return -EINVAL;
1193                 p++;
1194         }
1195
1196         entry->subtuples = q-p;
1197
1198         return 0;
1199 }
1200
1201
1202 static int parse_device_geo(tuple_t *tuple, cistpl_device_geo_t *geo)
1203 {
1204         u_char *p, *q;
1205         int n;
1206
1207         p = (u_char *)tuple->TupleData;
1208         q = p + tuple->TupleDataLen;
1209
1210         for (n = 0; n < CISTPL_MAX_DEVICES; n++) {
1211                 if (p > q-6)
1212                         break;
1213                 geo->geo[n].buswidth = p[0];
1214                 geo->geo[n].erase_block = 1 << (p[1]-1);
1215                 geo->geo[n].read_block  = 1 << (p[2]-1);
1216                 geo->geo[n].write_block = 1 << (p[3]-1);
1217                 geo->geo[n].partition   = 1 << (p[4]-1);
1218                 geo->geo[n].interleave  = 1 << (p[5]-1);
1219                 p += 6;
1220         }
1221         geo->ngeo = n;
1222         return 0;
1223 }
1224
1225
1226 static int parse_vers_2(tuple_t *tuple, cistpl_vers_2_t *v2)
1227 {
1228         u_char *p, *q;
1229
1230         if (tuple->TupleDataLen < 10)
1231                 return -EINVAL;
1232
1233         p = tuple->TupleData;
1234         q = p + tuple->TupleDataLen;
1235
1236         v2->vers = p[0];
1237         v2->comply = p[1];
1238         v2->dindex = get_unaligned_le16(p + 2);
1239         v2->vspec8 = p[6];
1240         v2->vspec9 = p[7];
1241         v2->nhdr = p[8];
1242         p += 9;
1243         return parse_strings(p, q, 2, v2->str, &v2->vendor, NULL);
1244 }
1245
1246
1247 static int parse_org(tuple_t *tuple, cistpl_org_t *org)
1248 {
1249         u_char *p, *q;
1250         int i;
1251
1252         p = tuple->TupleData;
1253         q = p + tuple->TupleDataLen;
1254         if (p == q)
1255                 return -EINVAL;
1256         org->data_org = *p;
1257         if (++p == q)
1258                 return -EINVAL;
1259         for (i = 0; i < 30; i++) {
1260                 org->desc[i] = *p;
1261                 if (*p == '\0')
1262                         break;
1263                 if (++p == q)
1264                         return -EINVAL;
1265         }
1266         return 0;
1267 }
1268
1269
1270 static int parse_format(tuple_t *tuple, cistpl_format_t *fmt)
1271 {
1272         u_char *p;
1273
1274         if (tuple->TupleDataLen < 10)
1275                 return -EINVAL;
1276
1277         p = tuple->TupleData;
1278
1279         fmt->type = p[0];
1280         fmt->edc = p[1];
1281         fmt->offset = get_unaligned_le32(p + 2);
1282         fmt->length = get_unaligned_le32(p + 6);
1283
1284         return 0;
1285 }
1286
1287
1288 int pcmcia_parse_tuple(tuple_t *tuple, cisparse_t *parse)
1289 {
1290         int ret = 0;
1291
1292         if (tuple->TupleDataLen > tuple->TupleDataMax)
1293                 return -EINVAL;
1294         switch (tuple->TupleCode) {
1295         case CISTPL_DEVICE:
1296         case CISTPL_DEVICE_A:
1297                 ret = parse_device(tuple, &parse->device);
1298                 break;
1299         case CISTPL_CHECKSUM:
1300                 ret = parse_checksum(tuple, &parse->checksum);
1301                 break;
1302         case CISTPL_LONGLINK_A:
1303         case CISTPL_LONGLINK_C:
1304                 ret = parse_longlink(tuple, &parse->longlink);
1305                 break;
1306         case CISTPL_LONGLINK_MFC:
1307                 ret = parse_longlink_mfc(tuple, &parse->longlink_mfc);
1308                 break;
1309         case CISTPL_VERS_1:
1310                 ret = parse_vers_1(tuple, &parse->version_1);
1311                 break;
1312         case CISTPL_ALTSTR:
1313                 ret = parse_altstr(tuple, &parse->altstr);
1314                 break;
1315         case CISTPL_JEDEC_A:
1316         case CISTPL_JEDEC_C:
1317                 ret = parse_jedec(tuple, &parse->jedec);
1318                 break;
1319         case CISTPL_MANFID:
1320                 ret = parse_manfid(tuple, &parse->manfid);
1321                 break;
1322         case CISTPL_FUNCID:
1323                 ret = parse_funcid(tuple, &parse->funcid);
1324                 break;
1325         case CISTPL_FUNCE:
1326                 ret = parse_funce(tuple, &parse->funce);
1327                 break;
1328         case CISTPL_CONFIG:
1329                 ret = parse_config(tuple, &parse->config);
1330                 break;
1331         case CISTPL_CFTABLE_ENTRY:
1332                 ret = parse_cftable_entry(tuple, &parse->cftable_entry);
1333                 break;
1334         case CISTPL_DEVICE_GEO:
1335         case CISTPL_DEVICE_GEO_A:
1336                 ret = parse_device_geo(tuple, &parse->device_geo);
1337                 break;
1338         case CISTPL_VERS_2:
1339                 ret = parse_vers_2(tuple, &parse->vers_2);
1340                 break;
1341         case CISTPL_ORG:
1342                 ret = parse_org(tuple, &parse->org);
1343                 break;
1344         case CISTPL_FORMAT:
1345         case CISTPL_FORMAT_A:
1346                 ret = parse_format(tuple, &parse->format);
1347                 break;
1348         case CISTPL_NO_LINK:
1349         case CISTPL_LINKTARGET:
1350                 ret = 0;
1351                 break;
1352         default:
1353                 ret = -EINVAL;
1354                 break;
1355         }
1356         if (ret)
1357                 pr_debug("parse_tuple failed %d\n", ret);
1358         return ret;
1359 }
1360 EXPORT_SYMBOL(pcmcia_parse_tuple);
1361
1362
1363 /**
1364  * pccard_validate_cis() - check whether card has a sensible CIS
1365  * @s:          the struct pcmcia_socket we are to check
1366  * @info:       returns the number of tuples in the (valid) CIS, or 0
1367  *
1368  * This tries to determine if a card has a sensible CIS.  In @info, it
1369  * returns the number of tuples in the CIS, or 0 if the CIS looks bad. The
1370  * checks include making sure several critical tuples are present and
1371  * valid; seeing if the total number of tuples is reasonable; and
1372  * looking for tuples that use reserved codes.
1373  *
1374  * The function returns 0 on success.
1375  */
1376 int pccard_validate_cis(struct pcmcia_socket *s, unsigned int *info)
1377 {
1378         tuple_t *tuple;
1379         cisparse_t *p;
1380         unsigned int count = 0;
1381         int ret, reserved, dev_ok = 0, ident_ok = 0;
1382
1383         if (!s)
1384                 return -EINVAL;
1385
1386         if (s->functions) {
1387                 WARN_ON(1);
1388                 return -EINVAL;
1389         }
1390
1391         /* We do not want to validate the CIS cache... */
1392         mutex_lock(&s->ops_mutex);
1393         destroy_cis_cache(s);
1394         mutex_unlock(&s->ops_mutex);
1395
1396         tuple = kmalloc(sizeof(*tuple), GFP_KERNEL);
1397         if (tuple == NULL) {
1398                 dev_warn(&s->dev, "no memory to validate CIS\n");
1399                 return -ENOMEM;
1400         }
1401         p = kmalloc(sizeof(*p), GFP_KERNEL);
1402         if (p == NULL) {
1403                 kfree(tuple);
1404                 dev_warn(&s->dev, "no memory to validate CIS\n");
1405                 return -ENOMEM;
1406         }
1407
1408         count = reserved = 0;
1409         tuple->DesiredTuple = RETURN_FIRST_TUPLE;
1410         tuple->Attributes = TUPLE_RETURN_COMMON;
1411         ret = pccard_get_first_tuple(s, BIND_FN_ALL, tuple);
1412         if (ret != 0)
1413                 goto done;
1414
1415         /* First tuple should be DEVICE; we should really have either that
1416            or a CFTABLE_ENTRY of some sort */
1417         if ((tuple->TupleCode == CISTPL_DEVICE) ||
1418             (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_CFTABLE_ENTRY, p)) ||
1419             (!pccard_read_tuple(s, BIND_FN_ALL, CISTPL_CFTABLE_ENTRY_CB, p)))
1420                 dev_ok++;
1421
1422         /* All cards should have a MANFID tuple, and/or a VERS_1 or VERS_2
1423            tuple, for card identification.  Certain old D-Link and Linksys
1424            cards have only a broken VERS_2 tuple; hence the bogus test. */
1425         if ((pccard_read_tuple(s, BIND_FN_ALL, CISTPL_MANFID, p) == 0) ||
1426             (pccard_read_tuple(s, BIND_FN_ALL, CISTPL_VERS_1, p) == 0) ||
1427             (pccard_read_tuple(s, BIND_FN_ALL, CISTPL_VERS_2, p) != -ENOSPC))
1428                 ident_ok++;
1429
1430         if (!dev_ok && !ident_ok)
1431                 goto done;
1432
1433         for (count = 1; count < MAX_TUPLES; count++) {
1434                 ret = pccard_get_next_tuple(s, BIND_FN_ALL, tuple);
1435                 if (ret != 0)
1436                         break;
1437                 if (((tuple->TupleCode > 0x23) && (tuple->TupleCode < 0x40)) ||
1438                     ((tuple->TupleCode > 0x47) && (tuple->TupleCode < 0x80)) ||
1439                     ((tuple->TupleCode > 0x90) && (tuple->TupleCode < 0xff)))
1440                         reserved++;
1441         }
1442         if ((count == MAX_TUPLES) || (reserved > 5) ||
1443                 ((!dev_ok || !ident_ok) && (count > 10)))
1444                 count = 0;
1445
1446         ret = 0;
1447
1448 done:
1449         /* invalidate CIS cache on failure */
1450         if (!dev_ok || !ident_ok || !count) {
1451                 mutex_lock(&s->ops_mutex);
1452                 destroy_cis_cache(s);
1453                 mutex_unlock(&s->ops_mutex);
1454                 ret = -EIO;
1455         }
1456
1457         if (info)
1458                 *info = count;
1459         kfree(tuple);
1460         kfree(p);
1461         return ret;
1462 }
1463
1464
1465 #define to_socket(_dev) container_of(_dev, struct pcmcia_socket, dev)
1466
1467 static ssize_t pccard_extract_cis(struct pcmcia_socket *s, char *buf,
1468                                   loff_t off, size_t count)
1469 {
1470         tuple_t tuple;
1471         int status, i;
1472         loff_t pointer = 0;
1473         ssize_t ret = 0;
1474         u_char *tuplebuffer;
1475         u_char *tempbuffer;
1476
1477         tuplebuffer = kmalloc(sizeof(u_char) * 256, GFP_KERNEL);
1478         if (!tuplebuffer)
1479                 return -ENOMEM;
1480
1481         tempbuffer = kmalloc(sizeof(u_char) * 258, GFP_KERNEL);
1482         if (!tempbuffer) {
1483                 ret = -ENOMEM;
1484                 goto free_tuple;
1485         }
1486
1487         memset(&tuple, 0, sizeof(tuple_t));
1488
1489         tuple.Attributes = TUPLE_RETURN_LINK | TUPLE_RETURN_COMMON;
1490         tuple.DesiredTuple = RETURN_FIRST_TUPLE;
1491         tuple.TupleOffset = 0;
1492
1493         status = pccard_get_first_tuple(s, BIND_FN_ALL, &tuple);
1494         while (!status) {
1495                 tuple.TupleData = tuplebuffer;
1496                 tuple.TupleDataMax = 255;
1497                 memset(tuplebuffer, 0, sizeof(u_char) * 255);
1498
1499                 status = pccard_get_tuple_data(s, &tuple);
1500                 if (status)
1501                         break;
1502
1503                 if (off < (pointer + 2 + tuple.TupleDataLen)) {
1504                         tempbuffer[0] = tuple.TupleCode & 0xff;
1505                         tempbuffer[1] = tuple.TupleLink & 0xff;
1506                         for (i = 0; i < tuple.TupleDataLen; i++)
1507                                 tempbuffer[i + 2] = tuplebuffer[i] & 0xff;
1508
1509                         for (i = 0; i < (2 + tuple.TupleDataLen); i++) {
1510                                 if (((i + pointer) >= off) &&
1511                                     (i + pointer) < (off + count)) {
1512                                         buf[ret] = tempbuffer[i];
1513                                         ret++;
1514                                 }
1515                         }
1516                 }
1517
1518                 pointer += 2 + tuple.TupleDataLen;
1519
1520                 if (pointer >= (off + count))
1521                         break;
1522
1523                 if (tuple.TupleCode == CISTPL_END)
1524                         break;
1525                 status = pccard_get_next_tuple(s, BIND_FN_ALL, &tuple);
1526         }
1527
1528         kfree(tempbuffer);
1529  free_tuple:
1530         kfree(tuplebuffer);
1531
1532         return ret;
1533 }
1534
1535
1536 static ssize_t pccard_show_cis(struct file *filp, struct kobject *kobj,
1537                                struct bin_attribute *bin_attr,
1538                                char *buf, loff_t off, size_t count)
1539 {
1540         unsigned int size = 0x200;
1541
1542         if (off >= size)
1543                 count = 0;
1544         else {
1545                 struct pcmcia_socket *s;
1546                 unsigned int chains = 1;
1547
1548                 if (off + count > size)
1549                         count = size - off;
1550
1551                 s = to_socket(container_of(kobj, struct device, kobj));
1552
1553                 if (!(s->state & SOCKET_PRESENT))
1554                         return -ENODEV;
1555                 if (!s->functions && pccard_validate_cis(s, &chains))
1556                         return -EIO;
1557                 if (!chains)
1558                         return -ENODATA;
1559
1560                 count = pccard_extract_cis(s, buf, off, count);
1561         }
1562
1563         return count;
1564 }
1565
1566
1567 static ssize_t pccard_store_cis(struct file *filp, struct kobject *kobj,
1568                                 struct bin_attribute *bin_attr,
1569                                 char *buf, loff_t off, size_t count)
1570 {
1571         struct pcmcia_socket *s;
1572         int error;
1573
1574         s = to_socket(container_of(kobj, struct device, kobj));
1575
1576         if (off)
1577                 return -EINVAL;
1578
1579         if (count >= CISTPL_MAX_CIS_SIZE)
1580                 return -EINVAL;
1581
1582         if (!(s->state & SOCKET_PRESENT))
1583                 return -ENODEV;
1584
1585         error = pcmcia_replace_cis(s, buf, count);
1586         if (error)
1587                 return -EIO;
1588
1589         pcmcia_parse_uevents(s, PCMCIA_UEVENT_REQUERY);
1590
1591         return count;
1592 }
1593
1594
1595 struct bin_attribute pccard_cis_attr = {
1596         .attr = { .name = "cis", .mode = S_IRUGO | S_IWUSR },
1597         .size = 0x200,
1598         .read = pccard_show_cis,
1599         .write = pccard_store_cis,
1600 };