blob: dcce9f5d84654a0612f99ed9bbe85813d53966f5 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070015#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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <linux/pci.h>
25#include <linux/ioport.h>
26#include <asm/io.h>
27#include <asm/byteorder.h>
Daniel Ritzdc0cf6a2007-10-16 01:23:52 -070028#include <asm/unaligned.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029
30#include <pcmcia/cs_types.h>
31#include <pcmcia/ss.h>
32#include <pcmcia/cs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include <pcmcia/cisreg.h>
34#include <pcmcia/cistpl.h>
35#include "cs_internal.h"
36
37static const u_char mantissa[] = {
38 10, 12, 13, 15, 20, 25, 30, 35,
39 40, 45, 50, 55, 60, 70, 80, 90
40};
41
42static 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/*====================================================================*/
58
59/* Parameters that can be set with 'insmod' */
60
Pavel Machek37f77952005-09-07 16:00:26 -070061/* 16-bit CIS? */
62static int cis_width;
63module_param(cis_width, int, 0444);
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
65void release_cis_mem(struct pcmcia_socket *s)
66{
67 if (s->cis_mem.flags & MAP_ACTIVE) {
68 s->cis_mem.flags &= ~MAP_ACTIVE;
69 s->ops->set_mem_map(s, &s->cis_mem);
70 if (s->cis_mem.res) {
71 release_resource(s->cis_mem.res);
72 kfree(s->cis_mem.res);
73 s->cis_mem.res = NULL;
74 }
75 iounmap(s->cis_virt);
76 s->cis_virt = NULL;
77 }
78}
79EXPORT_SYMBOL(release_cis_mem);
80
81/*
82 * Map the card memory at "card_offset" into virtual space.
83 * If flags & MAP_ATTRIB, map the attribute space, otherwise
84 * map the memory space.
85 */
86static void __iomem *
87set_cis_map(struct pcmcia_socket *s, unsigned int card_offset, unsigned int flags)
88{
Dominik Brodowski2e5a3e72005-07-28 01:07:23 -070089 pccard_mem_map *mem = &s->cis_mem;
90 int ret;
Dominik Brodowski2ad0a0a2005-06-27 16:28:58 -070091
Dominik Brodowski2e5a3e72005-07-28 01:07:23 -070092 if (!(s->features & SS_CAP_STATIC_MAP) && (mem->res == NULL)) {
93 mem->res = pcmcia_find_mem_region(0, s->map_size, s->map_size, 0, s);
94 if (mem->res == NULL) {
Dominik Brodowski2e55bf62008-08-02 18:08:38 +020095 dev_printk(KERN_NOTICE, &s->dev,
96 "cs: unable to map card memory!\n");
Dominik Brodowski2e5a3e72005-07-28 01:07:23 -070097 return NULL;
98 }
99 s->cis_virt = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 }
Dominik Brodowski2ad0a0a2005-06-27 16:28:58 -0700101
Dominik Brodowski2e5a3e72005-07-28 01:07:23 -0700102 if (!(s->features & SS_CAP_STATIC_MAP) && (!s->cis_virt))
103 s->cis_virt = ioremap(mem->res->start, s->map_size);
104
105 mem->card_start = card_offset;
106 mem->flags = flags;
107
108 ret = s->ops->set_mem_map(s, mem);
109 if (ret) {
110 iounmap(s->cis_virt);
111 s->cis_virt = NULL;
112 return NULL;
113 }
114
115 if (s->features & SS_CAP_STATIC_MAP) {
116 if (s->cis_virt)
117 iounmap(s->cis_virt);
118 s->cis_virt = ioremap(mem->static_start, s->map_size);
119 }
120
121 return s->cis_virt;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122}
123
124/*======================================================================
125
126 Low-level functions to read and write CIS memory. I think the
127 write routine is only useful for writing one-byte registers.
128
129======================================================================*/
130
131/* Bits in attr field */
132#define IS_ATTR 1
133#define IS_INDIRECT 8
134
Dominik Brodowskie6ea0b9e2005-06-27 16:28:52 -0700135int pcmcia_read_cis_mem(struct pcmcia_socket *s, int attr, u_int addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 u_int len, void *ptr)
137{
138 void __iomem *sys, *end;
139 unsigned char *buf = ptr;
140
Dominik Brodowskie6ea0b9e2005-06-27 16:28:52 -0700141 cs_dbg(s, 3, "pcmcia_read_cis_mem(%d, %#x, %u)\n", attr, addr, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142
143 if (attr & IS_INDIRECT) {
144 /* Indirect accesses use a bunch of special registers at fixed
145 locations in common memory */
146 u_char flags = ICTRL0_COMMON|ICTRL0_AUTOINC|ICTRL0_BYTEGRAN;
147 if (attr & IS_ATTR) {
148 addr *= 2;
149 flags = ICTRL0_AUTOINC;
150 }
151
152 sys = set_cis_map(s, 0, MAP_ACTIVE | ((cis_width) ? MAP_16BIT : 0));
153 if (!sys) {
154 memset(ptr, 0xff, len);
155 return -1;
156 }
157
158 writeb(flags, sys+CISREG_ICTRL0);
159 writeb(addr & 0xff, sys+CISREG_IADDR0);
160 writeb((addr>>8) & 0xff, sys+CISREG_IADDR1);
161 writeb((addr>>16) & 0xff, sys+CISREG_IADDR2);
162 writeb((addr>>24) & 0xff, sys+CISREG_IADDR3);
163 for ( ; len > 0; len--, buf++)
164 *buf = readb(sys+CISREG_IDATA0);
165 } else {
166 u_int inc = 1, card_offset, flags;
167
168 flags = MAP_ACTIVE | ((cis_width) ? MAP_16BIT : 0);
169 if (attr) {
170 flags |= MAP_ATTRIB;
171 inc++;
172 addr *= 2;
173 }
174
175 card_offset = addr & ~(s->map_size-1);
176 while (len) {
177 sys = set_cis_map(s, card_offset, flags);
178 if (!sys) {
179 memset(ptr, 0xff, len);
180 return -1;
181 }
182 end = sys + s->map_size;
183 sys = sys + (addr & (s->map_size-1));
184 for ( ; len > 0; len--, buf++, sys += inc) {
185 if (sys == end)
186 break;
187 *buf = readb(sys);
188 }
189 card_offset += s->map_size;
190 addr = 0;
191 }
192 }
193 cs_dbg(s, 3, " %#2.2x %#2.2x %#2.2x %#2.2x ...\n",
194 *(u_char *)(ptr+0), *(u_char *)(ptr+1),
195 *(u_char *)(ptr+2), *(u_char *)(ptr+3));
196 return 0;
197}
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700198EXPORT_SYMBOL(pcmcia_read_cis_mem);
199
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200
Dominik Brodowskie6ea0b9e2005-06-27 16:28:52 -0700201void pcmcia_write_cis_mem(struct pcmcia_socket *s, int attr, u_int addr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 u_int len, void *ptr)
203{
204 void __iomem *sys, *end;
205 unsigned char *buf = ptr;
206
Dominik Brodowskie6ea0b9e2005-06-27 16:28:52 -0700207 cs_dbg(s, 3, "pcmcia_write_cis_mem(%d, %#x, %u)\n", attr, addr, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208
209 if (attr & IS_INDIRECT) {
210 /* Indirect accesses use a bunch of special registers at fixed
211 locations in common memory */
212 u_char flags = ICTRL0_COMMON|ICTRL0_AUTOINC|ICTRL0_BYTEGRAN;
213 if (attr & IS_ATTR) {
214 addr *= 2;
215 flags = ICTRL0_AUTOINC;
216 }
217
218 sys = set_cis_map(s, 0, MAP_ACTIVE | ((cis_width) ? MAP_16BIT : 0));
219 if (!sys)
220 return; /* FIXME: Error */
221
222 writeb(flags, sys+CISREG_ICTRL0);
223 writeb(addr & 0xff, sys+CISREG_IADDR0);
224 writeb((addr>>8) & 0xff, sys+CISREG_IADDR1);
225 writeb((addr>>16) & 0xff, sys+CISREG_IADDR2);
226 writeb((addr>>24) & 0xff, sys+CISREG_IADDR3);
227 for ( ; len > 0; len--, buf++)
228 writeb(*buf, sys+CISREG_IDATA0);
229 } else {
230 u_int inc = 1, card_offset, flags;
231
232 flags = MAP_ACTIVE | ((cis_width) ? MAP_16BIT : 0);
233 if (attr & IS_ATTR) {
234 flags |= MAP_ATTRIB;
235 inc++;
236 addr *= 2;
237 }
238
239 card_offset = addr & ~(s->map_size-1);
240 while (len) {
241 sys = set_cis_map(s, card_offset, flags);
242 if (!sys)
243 return; /* FIXME: error */
244
245 end = sys + s->map_size;
246 sys = sys + (addr & (s->map_size-1));
247 for ( ; len > 0; len--, buf++, sys += inc) {
248 if (sys == end)
249 break;
250 writeb(*buf, sys);
251 }
252 card_offset += s->map_size;
253 addr = 0;
254 }
255 }
256}
Dominik Brodowski1a8d4662005-06-27 16:28:53 -0700257EXPORT_SYMBOL(pcmcia_write_cis_mem);
258
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259
260/*======================================================================
261
262 This is a wrapper around read_cis_mem, with the same interface,
263 but which caches information, for cards whose CIS may not be
264 readable all the time.
265
266======================================================================*/
267
268static void read_cis_cache(struct pcmcia_socket *s, int attr, u_int addr,
Dominik Brodowski53efec92008-07-28 19:44:05 +0200269 size_t len, void *ptr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270{
271 struct cis_cache_entry *cis;
272 int ret;
273
274 if (s->fake_cis) {
Dominik Brodowski53efec92008-07-28 19:44:05 +0200275 if (s->fake_cis_len >= addr+len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 memcpy(ptr, s->fake_cis+addr, len);
277 else
278 memset(ptr, 0xff, len);
279 return;
280 }
281
282 list_for_each_entry(cis, &s->cis_cache, node) {
283 if (cis->addr == addr && cis->len == len && cis->attr == attr) {
284 memcpy(ptr, cis->cache, len);
285 return;
286 }
287 }
288
289#ifdef CONFIG_CARDBUS
290 if (s->state & SOCKET_CARDBUS)
291 ret = read_cb_mem(s, attr, addr, len, ptr);
292 else
293#endif
Dominik Brodowskie6ea0b9e2005-06-27 16:28:52 -0700294 ret = pcmcia_read_cis_mem(s, attr, addr, len, ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295
296 if (ret == 0) {
297 /* Copy data into the cache */
298 cis = kmalloc(sizeof(struct cis_cache_entry) + len, GFP_KERNEL);
299 if (cis) {
300 cis->addr = addr;
301 cis->len = len;
302 cis->attr = attr;
303 memcpy(cis->cache, ptr, len);
304 list_add(&cis->node, &s->cis_cache);
305 }
306 }
307}
308
309static void
310remove_cis_cache(struct pcmcia_socket *s, int attr, u_int addr, u_int len)
311{
312 struct cis_cache_entry *cis;
313
314 list_for_each_entry(cis, &s->cis_cache, node)
315 if (cis->addr == addr && cis->len == len && cis->attr == attr) {
316 list_del(&cis->node);
317 kfree(cis);
318 break;
319 }
320}
321
322void destroy_cis_cache(struct pcmcia_socket *s)
323{
324 struct list_head *l, *n;
325
326 list_for_each_safe(l, n, &s->cis_cache) {
327 struct cis_cache_entry *cis = list_entry(l, struct cis_cache_entry, node);
328
329 list_del(&cis->node);
330 kfree(cis);
331 }
332
333 /*
334 * If there was a fake CIS, destroy that as well.
335 */
Jesper Juhl6044ec82005-11-07 01:01:32 -0800336 kfree(s->fake_cis);
337 s->fake_cis = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338}
339EXPORT_SYMBOL(destroy_cis_cache);
340
341/*======================================================================
342
343 This verifies if the CIS of a card matches what is in the CIS
344 cache.
345
346======================================================================*/
347
348int verify_cis_cache(struct pcmcia_socket *s)
349{
350 struct cis_cache_entry *cis;
351 char *buf;
352
353 buf = kmalloc(256, GFP_KERNEL);
354 if (buf == NULL)
Dominik Brodowski11683862008-08-03 10:22:47 +0200355 dev_printk(KERN_WARNING, &s->dev,
356 "no memory for verifying CIS\n");
357 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 list_for_each_entry(cis, &s->cis_cache, node) {
359 int len = cis->len;
360
361 if (len > 256)
362 len = 256;
363#ifdef CONFIG_CARDBUS
364 if (s->state & SOCKET_CARDBUS)
365 read_cb_mem(s, cis->attr, cis->addr, len, buf);
366 else
367#endif
Dominik Brodowskie6ea0b9e2005-06-27 16:28:52 -0700368 pcmcia_read_cis_mem(s, cis->attr, cis->addr, len, buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369
370 if (memcmp(buf, cis->cache, len) != 0) {
371 kfree(buf);
372 return -1;
373 }
374 }
375 kfree(buf);
376 return 0;
377}
378
379/*======================================================================
380
381 For really bad cards, we provide a facility for uploading a
382 replacement CIS.
383
384======================================================================*/
385
Dominik Brodowski53efec92008-07-28 19:44:05 +0200386int pcmcia_replace_cis(struct pcmcia_socket *s,
387 const u8 *data, const size_t len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388{
Dominik Brodowski11683862008-08-03 10:22:47 +0200389 if (len > CISTPL_MAX_CIS_SIZE) {
390 dev_printk(KERN_WARNING, &s->dev, "replacement CIS too big\n");
391 return -EINVAL;
392 }
393 kfree(s->fake_cis);
394 s->fake_cis = kmalloc(len, GFP_KERNEL);
395 if (s->fake_cis == NULL) {
396 dev_printk(KERN_WARNING, &s->dev, "no memory to replace CIS\n");
397 return -ENOMEM;
398 }
399 s->fake_cis_len = len;
400 memcpy(s->fake_cis, data, len);
401 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402}
Dominik Brodowski33519dd2005-06-27 16:28:53 -0700403EXPORT_SYMBOL(pcmcia_replace_cis);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404
405/*======================================================================
406
407 The high-level CIS tuple services
408
409======================================================================*/
410
411typedef struct tuple_flags {
412 u_int link_space:4;
413 u_int has_link:1;
414 u_int mfc_fn:3;
415 u_int space:4;
416} tuple_flags;
417
418#define LINK_SPACE(f) (((tuple_flags *)(&(f)))->link_space)
419#define HAS_LINK(f) (((tuple_flags *)(&(f)))->has_link)
420#define MFC_FN(f) (((tuple_flags *)(&(f)))->mfc_fn)
421#define SPACE(f) (((tuple_flags *)(&(f)))->space)
422
423int pccard_get_next_tuple(struct pcmcia_socket *s, unsigned int func, tuple_t *tuple);
424
425int pccard_get_first_tuple(struct pcmcia_socket *s, unsigned int function, tuple_t *tuple)
426{
427 if (!s)
Dominik Brodowskiffb8da22008-08-03 11:18:00 +0200428 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 if (!(s->state & SOCKET_PRESENT))
Dominik Brodowski3939c1ef2008-08-03 11:10:56 +0200430 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 tuple->TupleLink = tuple->Flags = 0;
432#ifdef CONFIG_CARDBUS
433 if (s->state & SOCKET_CARDBUS) {
434 struct pci_dev *dev = s->cb_dev;
435 u_int ptr;
436 pci_bus_read_config_dword(dev->subordinate, 0, PCI_CARDBUS_CIS, &ptr);
437 tuple->CISOffset = ptr & ~7;
438 SPACE(tuple->Flags) = (ptr & 7);
439 } else
440#endif
441 {
442 /* Assume presence of a LONGLINK_C to address 0 */
443 tuple->CISOffset = tuple->LinkOffset = 0;
444 SPACE(tuple->Flags) = HAS_LINK(tuple->Flags) = 1;
445 }
446 if (!(s->state & SOCKET_CARDBUS) && (s->functions > 1) &&
447 !(tuple->Attributes & TUPLE_RETURN_COMMON)) {
448 cisdata_t req = tuple->DesiredTuple;
449 tuple->DesiredTuple = CISTPL_LONGLINK_MFC;
Dominik Brodowski4c89e882008-08-03 10:07:45 +0200450 if (pccard_get_next_tuple(s, function, tuple) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 tuple->DesiredTuple = CISTPL_LINKTARGET;
Dominik Brodowski4c89e882008-08-03 10:07:45 +0200452 if (pccard_get_next_tuple(s, function, tuple) != 0)
Dominik Brodowski635d19b2008-08-03 11:47:29 +0200453 return -ENOSPC;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 } else
455 tuple->CISOffset = tuple->TupleLink = 0;
456 tuple->DesiredTuple = req;
457 }
458 return pccard_get_next_tuple(s, function, tuple);
459}
460EXPORT_SYMBOL(pccard_get_first_tuple);
461
462static int follow_link(struct pcmcia_socket *s, tuple_t *tuple)
463{
464 u_char link[5];
465 u_int ofs;
466
467 if (MFC_FN(tuple->Flags)) {
468 /* Get indirect link from the MFC tuple */
469 read_cis_cache(s, LINK_SPACE(tuple->Flags),
470 tuple->LinkOffset, 5, link);
Harvey Harrison6b1e6f62008-04-29 01:03:39 -0700471 ofs = get_unaligned_le32(link + 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 SPACE(tuple->Flags) = (link[0] == CISTPL_MFC_ATTR);
473 /* Move to the next indirect link */
474 tuple->LinkOffset += 5;
475 MFC_FN(tuple->Flags)--;
476 } else if (HAS_LINK(tuple->Flags)) {
477 ofs = tuple->LinkOffset;
478 SPACE(tuple->Flags) = LINK_SPACE(tuple->Flags);
479 HAS_LINK(tuple->Flags) = 0;
480 } else {
481 return -1;
482 }
483 if (!(s->state & SOCKET_CARDBUS) && SPACE(tuple->Flags)) {
484 /* This is ugly, but a common CIS error is to code the long
485 link offset incorrectly, so we check the right spot... */
486 read_cis_cache(s, SPACE(tuple->Flags), ofs, 5, link);
487 if ((link[0] == CISTPL_LINKTARGET) && (link[1] >= 3) &&
488 (strncmp(link+2, "CIS", 3) == 0))
489 return ofs;
490 remove_cis_cache(s, SPACE(tuple->Flags), ofs, 5);
491 /* Then, we try the wrong spot... */
492 ofs = ofs >> 1;
493 }
494 read_cis_cache(s, SPACE(tuple->Flags), ofs, 5, link);
495 if ((link[0] == CISTPL_LINKTARGET) && (link[1] >= 3) &&
496 (strncmp(link+2, "CIS", 3) == 0))
497 return ofs;
498 remove_cis_cache(s, SPACE(tuple->Flags), ofs, 5);
499 return -1;
500}
501
502int pccard_get_next_tuple(struct pcmcia_socket *s, unsigned int function, tuple_t *tuple)
503{
504 u_char link[2], tmp;
505 int ofs, i, attr;
506
507 if (!s)
Dominik Brodowskiffb8da22008-08-03 11:18:00 +0200508 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700509 if (!(s->state & SOCKET_PRESENT))
Dominik Brodowski3939c1ef2008-08-03 11:10:56 +0200510 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511
512 link[1] = tuple->TupleLink;
513 ofs = tuple->CISOffset + tuple->TupleLink;
514 attr = SPACE(tuple->Flags);
515
516 for (i = 0; i < MAX_TUPLES; i++) {
517 if (link[1] == 0xff) {
518 link[0] = CISTPL_END;
519 } else {
520 read_cis_cache(s, attr, ofs, 2, link);
521 if (link[0] == CISTPL_NULL) {
522 ofs++; continue;
523 }
524 }
525
526 /* End of chain? Follow long link if possible */
527 if (link[0] == CISTPL_END) {
528 if ((ofs = follow_link(s, tuple)) < 0)
Dominik Brodowski635d19b2008-08-03 11:47:29 +0200529 return -ENOSPC;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530 attr = SPACE(tuple->Flags);
531 read_cis_cache(s, attr, ofs, 2, link);
532 }
533
534 /* Is this a link tuple? Make a note of it */
535 if ((link[0] == CISTPL_LONGLINK_A) ||
536 (link[0] == CISTPL_LONGLINK_C) ||
537 (link[0] == CISTPL_LONGLINK_MFC) ||
538 (link[0] == CISTPL_LINKTARGET) ||
539 (link[0] == CISTPL_INDIRECT) ||
540 (link[0] == CISTPL_NO_LINK)) {
541 switch (link[0]) {
542 case CISTPL_LONGLINK_A:
543 HAS_LINK(tuple->Flags) = 1;
544 LINK_SPACE(tuple->Flags) = attr | IS_ATTR;
545 read_cis_cache(s, attr, ofs+2, 4, &tuple->LinkOffset);
546 break;
547 case CISTPL_LONGLINK_C:
548 HAS_LINK(tuple->Flags) = 1;
549 LINK_SPACE(tuple->Flags) = attr & ~IS_ATTR;
550 read_cis_cache(s, attr, ofs+2, 4, &tuple->LinkOffset);
551 break;
552 case CISTPL_INDIRECT:
553 HAS_LINK(tuple->Flags) = 1;
554 LINK_SPACE(tuple->Flags) = IS_ATTR | IS_INDIRECT;
555 tuple->LinkOffset = 0;
556 break;
557 case CISTPL_LONGLINK_MFC:
558 tuple->LinkOffset = ofs + 3;
559 LINK_SPACE(tuple->Flags) = attr;
560 if (function == BIND_FN_ALL) {
561 /* Follow all the MFC links */
562 read_cis_cache(s, attr, ofs+2, 1, &tmp);
563 MFC_FN(tuple->Flags) = tmp;
564 } else {
565 /* Follow exactly one of the links */
566 MFC_FN(tuple->Flags) = 1;
567 tuple->LinkOffset += function * 5;
568 }
569 break;
570 case CISTPL_NO_LINK:
571 HAS_LINK(tuple->Flags) = 0;
572 break;
573 }
574 if ((tuple->Attributes & TUPLE_RETURN_LINK) &&
575 (tuple->DesiredTuple == RETURN_FIRST_TUPLE))
576 break;
577 } else
578 if (tuple->DesiredTuple == RETURN_FIRST_TUPLE)
579 break;
580
581 if (link[0] == tuple->DesiredTuple)
582 break;
583 ofs += link[1] + 2;
584 }
585 if (i == MAX_TUPLES) {
586 cs_dbg(s, 1, "cs: overrun in pcmcia_get_next_tuple\n");
Dominik Brodowski635d19b2008-08-03 11:47:29 +0200587 return -ENOSPC;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 }
589
590 tuple->TupleCode = link[0];
591 tuple->TupleLink = link[1];
592 tuple->CISOffset = ofs + 2;
Dominik Brodowski4c89e882008-08-03 10:07:45 +0200593 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594}
595EXPORT_SYMBOL(pccard_get_next_tuple);
596
597/*====================================================================*/
598
599#define _MIN(a, b) (((a) < (b)) ? (a) : (b))
600
601int pccard_get_tuple_data(struct pcmcia_socket *s, tuple_t *tuple)
602{
603 u_int len;
604
605 if (!s)
Dominik Brodowskiffb8da22008-08-03 11:18:00 +0200606 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607
608 if (tuple->TupleLink < tuple->TupleOffset)
Dominik Brodowski635d19b2008-08-03 11:47:29 +0200609 return -ENOSPC;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610 len = tuple->TupleLink - tuple->TupleOffset;
611 tuple->TupleDataLen = tuple->TupleLink;
612 if (len == 0)
Dominik Brodowski4c89e882008-08-03 10:07:45 +0200613 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614 read_cis_cache(s, SPACE(tuple->Flags),
615 tuple->CISOffset + tuple->TupleOffset,
616 _MIN(len, tuple->TupleDataMax), tuple->TupleData);
Dominik Brodowski4c89e882008-08-03 10:07:45 +0200617 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618}
619EXPORT_SYMBOL(pccard_get_tuple_data);
620
621
622/*======================================================================
623
624 Parsing routines for individual tuples
625
626======================================================================*/
627
628static int parse_device(tuple_t *tuple, cistpl_device_t *device)
629{
630 int i;
631 u_char scale;
632 u_char *p, *q;
633
634 p = (u_char *)tuple->TupleData;
635 q = p + tuple->TupleDataLen;
636
637 device->ndev = 0;
638 for (i = 0; i < CISTPL_MAX_DEVICES; i++) {
639
640 if (*p == 0xff) break;
641 device->dev[i].type = (*p >> 4);
642 device->dev[i].wp = (*p & 0x08) ? 1 : 0;
643 switch (*p & 0x07) {
644 case 0: device->dev[i].speed = 0; break;
645 case 1: device->dev[i].speed = 250; break;
646 case 2: device->dev[i].speed = 200; break;
647 case 3: device->dev[i].speed = 150; break;
648 case 4: device->dev[i].speed = 100; break;
649 case 7:
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +0200650 if (++p == q)
651 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652 device->dev[i].speed = SPEED_CVT(*p);
653 while (*p & 0x80)
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +0200654 if (++p == q)
655 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 break;
657 default:
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +0200658 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659 }
660
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +0200661 if (++p == q)
662 return -EINVAL;
663 if (*p == 0xff)
664 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 scale = *p & 7;
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +0200666 if (scale == 7)
667 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668 device->dev[i].size = ((*p >> 3) + 1) * (512 << (scale*2));
669 device->ndev++;
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +0200670 if (++p == q)
671 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672 }
673
Dominik Brodowski4c89e882008-08-03 10:07:45 +0200674 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675}
676
677/*====================================================================*/
678
679static int parse_checksum(tuple_t *tuple, cistpl_checksum_t *csum)
680{
681 u_char *p;
682 if (tuple->TupleDataLen < 5)
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +0200683 return -EINVAL;
Daniel Ritzdc0cf6a2007-10-16 01:23:52 -0700684 p = (u_char *) tuple->TupleData;
Harvey Harrison6b1e6f62008-04-29 01:03:39 -0700685 csum->addr = tuple->CISOffset + get_unaligned_le16(p) - 2;
686 csum->len = get_unaligned_le16(p + 2);
Daniel Ritzdc0cf6a2007-10-16 01:23:52 -0700687 csum->sum = *(p + 4);
Dominik Brodowski4c89e882008-08-03 10:07:45 +0200688 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689}
690
691/*====================================================================*/
692
693static int parse_longlink(tuple_t *tuple, cistpl_longlink_t *link)
694{
695 if (tuple->TupleDataLen < 4)
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +0200696 return -EINVAL;
Harvey Harrison6b1e6f62008-04-29 01:03:39 -0700697 link->addr = get_unaligned_le32(tuple->TupleData);
Dominik Brodowski4c89e882008-08-03 10:07:45 +0200698 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699}
700
701/*====================================================================*/
702
703static int parse_longlink_mfc(tuple_t *tuple,
704 cistpl_longlink_mfc_t *link)
705{
706 u_char *p;
707 int i;
708
709 p = (u_char *)tuple->TupleData;
710
711 link->nfn = *p; p++;
712 if (tuple->TupleDataLen <= link->nfn*5)
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +0200713 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 for (i = 0; i < link->nfn; i++) {
715 link->fn[i].space = *p; p++;
Harvey Harrison6b1e6f62008-04-29 01:03:39 -0700716 link->fn[i].addr = get_unaligned_le32(p);
Daniel Ritzdc0cf6a2007-10-16 01:23:52 -0700717 p += 4;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718 }
Dominik Brodowski4c89e882008-08-03 10:07:45 +0200719 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720}
721
722/*====================================================================*/
723
724static int parse_strings(u_char *p, u_char *q, int max,
725 char *s, u_char *ofs, u_char *found)
726{
727 int i, j, ns;
728
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +0200729 if (p == q)
730 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731 ns = 0; j = 0;
732 for (i = 0; i < max; i++) {
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +0200733 if (*p == 0xff)
734 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 ofs[i] = j;
736 ns++;
737 for (;;) {
738 s[j++] = (*p == 0xff) ? '\0' : *p;
739 if ((*p == '\0') || (*p == 0xff)) break;
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +0200740 if (++p == q)
741 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742 }
743 if ((*p == 0xff) || (++p == q)) break;
744 }
745 if (found) {
746 *found = ns;
Dominik Brodowski4c89e882008-08-03 10:07:45 +0200747 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748 } else {
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +0200749 return (ns == max) ? 0 : -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700750 }
751}
752
753/*====================================================================*/
754
755static int parse_vers_1(tuple_t *tuple, cistpl_vers_1_t *vers_1)
756{
757 u_char *p, *q;
758
759 p = (u_char *)tuple->TupleData;
760 q = p + tuple->TupleDataLen;
761
762 vers_1->major = *p; p++;
763 vers_1->minor = *p; p++;
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +0200764 if (p >= q)
765 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766
767 return parse_strings(p, q, CISTPL_VERS_1_MAX_PROD_STRINGS,
768 vers_1->str, vers_1->ofs, &vers_1->ns);
769}
770
771/*====================================================================*/
772
773static int parse_altstr(tuple_t *tuple, cistpl_altstr_t *altstr)
774{
775 u_char *p, *q;
776
777 p = (u_char *)tuple->TupleData;
778 q = p + tuple->TupleDataLen;
779
780 return parse_strings(p, q, CISTPL_MAX_ALTSTR_STRINGS,
781 altstr->str, altstr->ofs, &altstr->ns);
782}
783
784/*====================================================================*/
785
786static int parse_jedec(tuple_t *tuple, cistpl_jedec_t *jedec)
787{
788 u_char *p, *q;
789 int nid;
790
791 p = (u_char *)tuple->TupleData;
792 q = p + tuple->TupleDataLen;
793
794 for (nid = 0; nid < CISTPL_MAX_DEVICES; nid++) {
795 if (p > q-2) break;
796 jedec->id[nid].mfr = p[0];
797 jedec->id[nid].info = p[1];
798 p += 2;
799 }
800 jedec->nid = nid;
Dominik Brodowski4c89e882008-08-03 10:07:45 +0200801 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802}
803
804/*====================================================================*/
805
806static int parse_manfid(tuple_t *tuple, cistpl_manfid_t *m)
807{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808 if (tuple->TupleDataLen < 4)
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +0200809 return -EINVAL;
Harvey Harrison6b1e6f62008-04-29 01:03:39 -0700810 m->manf = get_unaligned_le16(tuple->TupleData);
811 m->card = get_unaligned_le16(tuple->TupleData + 2);
Dominik Brodowski4c89e882008-08-03 10:07:45 +0200812 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813}
814
815/*====================================================================*/
816
817static int parse_funcid(tuple_t *tuple, cistpl_funcid_t *f)
818{
819 u_char *p;
820 if (tuple->TupleDataLen < 2)
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +0200821 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822 p = (u_char *)tuple->TupleData;
823 f->func = p[0];
824 f->sysinit = p[1];
Dominik Brodowski4c89e882008-08-03 10:07:45 +0200825 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826}
827
828/*====================================================================*/
829
830static int parse_funce(tuple_t *tuple, cistpl_funce_t *f)
831{
832 u_char *p;
833 int i;
834 if (tuple->TupleDataLen < 1)
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +0200835 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836 p = (u_char *)tuple->TupleData;
837 f->type = p[0];
838 for (i = 1; i < tuple->TupleDataLen; i++)
839 f->data[i-1] = p[i];
Dominik Brodowski4c89e882008-08-03 10:07:45 +0200840 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841}
842
843/*====================================================================*/
844
845static int parse_config(tuple_t *tuple, cistpl_config_t *config)
846{
847 int rasz, rmsz, i;
848 u_char *p;
849
850 p = (u_char *)tuple->TupleData;
851 rasz = *p & 0x03;
852 rmsz = (*p & 0x3c) >> 2;
853 if (tuple->TupleDataLen < rasz+rmsz+4)
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +0200854 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855 config->last_idx = *(++p);
856 p++;
857 config->base = 0;
858 for (i = 0; i <= rasz; i++)
859 config->base += p[i] << (8*i);
860 p += rasz+1;
861 for (i = 0; i < 4; i++)
862 config->rmask[i] = 0;
863 for (i = 0; i <= rmsz; i++)
864 config->rmask[i>>2] += p[i] << (8*(i%4));
865 config->subtuples = tuple->TupleDataLen - (rasz+rmsz+4);
Dominik Brodowski4c89e882008-08-03 10:07:45 +0200866 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700867}
868
869/*======================================================================
870
871 The following routines are all used to parse the nightmarish
872 config table entries.
873
874======================================================================*/
875
876static u_char *parse_power(u_char *p, u_char *q,
877 cistpl_power_t *pwr)
878{
879 int i;
880 u_int scale;
881
882 if (p == q) return NULL;
883 pwr->present = *p;
884 pwr->flags = 0;
885 p++;
886 for (i = 0; i < 7; i++)
887 if (pwr->present & (1<<i)) {
888 if (p == q) return NULL;
889 pwr->param[i] = POWER_CVT(*p);
890 scale = POWER_SCALE(*p);
891 while (*p & 0x80) {
892 if (++p == q) return NULL;
893 if ((*p & 0x7f) < 100)
894 pwr->param[i] += (*p & 0x7f) * scale / 100;
895 else if (*p == 0x7d)
896 pwr->flags |= CISTPL_POWER_HIGHZ_OK;
897 else if (*p == 0x7e)
898 pwr->param[i] = 0;
899 else if (*p == 0x7f)
900 pwr->flags |= CISTPL_POWER_HIGHZ_REQ;
901 else
902 return NULL;
903 }
904 p++;
905 }
906 return p;
907}
908
909/*====================================================================*/
910
911static u_char *parse_timing(u_char *p, u_char *q,
912 cistpl_timing_t *timing)
913{
914 u_char scale;
915
916 if (p == q) return NULL;
917 scale = *p;
918 if ((scale & 3) != 3) {
919 if (++p == q) return NULL;
920 timing->wait = SPEED_CVT(*p);
921 timing->waitscale = exponent[scale & 3];
922 } else
923 timing->wait = 0;
924 scale >>= 2;
925 if ((scale & 7) != 7) {
926 if (++p == q) return NULL;
927 timing->ready = SPEED_CVT(*p);
928 timing->rdyscale = exponent[scale & 7];
929 } else
930 timing->ready = 0;
931 scale >>= 3;
932 if (scale != 7) {
933 if (++p == q) return NULL;
934 timing->reserved = SPEED_CVT(*p);
935 timing->rsvscale = exponent[scale];
936 } else
937 timing->reserved = 0;
938 p++;
939 return p;
940}
941
942/*====================================================================*/
943
944static u_char *parse_io(u_char *p, u_char *q, cistpl_io_t *io)
945{
946 int i, j, bsz, lsz;
947
948 if (p == q) return NULL;
949 io->flags = *p;
950
951 if (!(*p & 0x80)) {
952 io->nwin = 1;
953 io->win[0].base = 0;
954 io->win[0].len = (1 << (io->flags & CISTPL_IO_LINES_MASK));
955 return p+1;
956 }
957
958 if (++p == q) return NULL;
959 io->nwin = (*p & 0x0f) + 1;
960 bsz = (*p & 0x30) >> 4;
961 if (bsz == 3) bsz++;
962 lsz = (*p & 0xc0) >> 6;
963 if (lsz == 3) lsz++;
964 p++;
965
966 for (i = 0; i < io->nwin; i++) {
967 io->win[i].base = 0;
968 io->win[i].len = 1;
969 for (j = 0; j < bsz; j++, p++) {
970 if (p == q) return NULL;
971 io->win[i].base += *p << (j*8);
972 }
973 for (j = 0; j < lsz; j++, p++) {
974 if (p == q) return NULL;
975 io->win[i].len += *p << (j*8);
976 }
977 }
978 return p;
979}
980
981/*====================================================================*/
982
983static u_char *parse_mem(u_char *p, u_char *q, cistpl_mem_t *mem)
984{
985 int i, j, asz, lsz, has_ha;
986 u_int len, ca, ha;
987
988 if (p == q) return NULL;
989
990 mem->nwin = (*p & 0x07) + 1;
991 lsz = (*p & 0x18) >> 3;
992 asz = (*p & 0x60) >> 5;
993 has_ha = (*p & 0x80);
994 if (++p == q) return NULL;
995
996 for (i = 0; i < mem->nwin; i++) {
997 len = ca = ha = 0;
998 for (j = 0; j < lsz; j++, p++) {
999 if (p == q) return NULL;
1000 len += *p << (j*8);
1001 }
1002 for (j = 0; j < asz; j++, p++) {
1003 if (p == q) return NULL;
1004 ca += *p << (j*8);
1005 }
1006 if (has_ha)
1007 for (j = 0; j < asz; j++, p++) {
1008 if (p == q) return NULL;
1009 ha += *p << (j*8);
1010 }
1011 mem->win[i].len = len << 8;
1012 mem->win[i].card_addr = ca << 8;
1013 mem->win[i].host_addr = ha << 8;
1014 }
1015 return p;
1016}
1017
1018/*====================================================================*/
1019
1020static u_char *parse_irq(u_char *p, u_char *q, cistpl_irq_t *irq)
1021{
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001022 if (p == q)
1023 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024 irq->IRQInfo1 = *p; p++;
1025 if (irq->IRQInfo1 & IRQ_INFO2_VALID) {
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001026 if (p+2 > q)
1027 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028 irq->IRQInfo2 = (p[1]<<8) + p[0];
1029 p += 2;
1030 }
1031 return p;
1032}
1033
1034/*====================================================================*/
1035
1036static int parse_cftable_entry(tuple_t *tuple,
1037 cistpl_cftable_entry_t *entry)
1038{
1039 u_char *p, *q, features;
1040
1041 p = tuple->TupleData;
1042 q = p + tuple->TupleDataLen;
1043 entry->index = *p & 0x3f;
1044 entry->flags = 0;
1045 if (*p & 0x40)
1046 entry->flags |= CISTPL_CFTABLE_DEFAULT;
1047 if (*p & 0x80) {
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001048 if (++p == q)
1049 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050 if (*p & 0x10)
1051 entry->flags |= CISTPL_CFTABLE_BVDS;
1052 if (*p & 0x20)
1053 entry->flags |= CISTPL_CFTABLE_WP;
1054 if (*p & 0x40)
1055 entry->flags |= CISTPL_CFTABLE_RDYBSY;
1056 if (*p & 0x80)
1057 entry->flags |= CISTPL_CFTABLE_MWAIT;
1058 entry->interface = *p & 0x0f;
1059 } else
1060 entry->interface = 0;
1061
1062 /* Process optional features */
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001063 if (++p == q)
1064 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065 features = *p; p++;
1066
1067 /* Power options */
1068 if ((features & 3) > 0) {
1069 p = parse_power(p, q, &entry->vcc);
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001070 if (p == NULL)
1071 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072 } else
1073 entry->vcc.present = 0;
1074 if ((features & 3) > 1) {
1075 p = parse_power(p, q, &entry->vpp1);
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001076 if (p == NULL)
1077 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078 } else
1079 entry->vpp1.present = 0;
1080 if ((features & 3) > 2) {
1081 p = parse_power(p, q, &entry->vpp2);
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001082 if (p == NULL)
1083 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084 } else
1085 entry->vpp2.present = 0;
1086
1087 /* Timing options */
1088 if (features & 0x04) {
1089 p = parse_timing(p, q, &entry->timing);
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001090 if (p == NULL)
1091 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092 } else {
1093 entry->timing.wait = 0;
1094 entry->timing.ready = 0;
1095 entry->timing.reserved = 0;
1096 }
1097
1098 /* I/O window options */
1099 if (features & 0x08) {
1100 p = parse_io(p, q, &entry->io);
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001101 if (p == NULL)
1102 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 } else
1104 entry->io.nwin = 0;
1105
1106 /* Interrupt options */
1107 if (features & 0x10) {
1108 p = parse_irq(p, q, &entry->irq);
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001109 if (p == NULL)
1110 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111 } else
1112 entry->irq.IRQInfo1 = 0;
1113
1114 switch (features & 0x60) {
1115 case 0x00:
1116 entry->mem.nwin = 0;
1117 break;
1118 case 0x20:
1119 entry->mem.nwin = 1;
Harvey Harrison6b1e6f62008-04-29 01:03:39 -07001120 entry->mem.win[0].len = get_unaligned_le16(p) << 8;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001121 entry->mem.win[0].card_addr = 0;
1122 entry->mem.win[0].host_addr = 0;
1123 p += 2;
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001124 if (p > q)
1125 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001126 break;
1127 case 0x40:
1128 entry->mem.nwin = 1;
Harvey Harrison6b1e6f62008-04-29 01:03:39 -07001129 entry->mem.win[0].len = get_unaligned_le16(p) << 8;
1130 entry->mem.win[0].card_addr = get_unaligned_le16(p + 2) << 8;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131 entry->mem.win[0].host_addr = 0;
1132 p += 4;
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001133 if (p > q)
1134 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135 break;
1136 case 0x60:
1137 p = parse_mem(p, q, &entry->mem);
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001138 if (p == NULL)
1139 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140 break;
1141 }
1142
1143 /* Misc features */
1144 if (features & 0x80) {
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001145 if (p == q)
1146 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147 entry->flags |= (*p << 8);
1148 while (*p & 0x80)
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001149 if (++p == q)
1150 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151 p++;
1152 }
1153
1154 entry->subtuples = q-p;
1155
Dominik Brodowski4c89e882008-08-03 10:07:45 +02001156 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001157}
1158
1159/*====================================================================*/
1160
1161#ifdef CONFIG_CARDBUS
1162
1163static int parse_bar(tuple_t *tuple, cistpl_bar_t *bar)
1164{
1165 u_char *p;
1166 if (tuple->TupleDataLen < 6)
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001167 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001168 p = (u_char *)tuple->TupleData;
1169 bar->attr = *p;
1170 p += 2;
Harvey Harrison6b1e6f62008-04-29 01:03:39 -07001171 bar->size = get_unaligned_le32(p);
Dominik Brodowski4c89e882008-08-03 10:07:45 +02001172 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001173}
1174
1175static int parse_config_cb(tuple_t *tuple, cistpl_config_t *config)
1176{
1177 u_char *p;
1178
1179 p = (u_char *)tuple->TupleData;
1180 if ((*p != 3) || (tuple->TupleDataLen < 6))
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001181 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001182 config->last_idx = *(++p);
1183 p++;
Harvey Harrison6b1e6f62008-04-29 01:03:39 -07001184 config->base = get_unaligned_le32(p);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001185 config->subtuples = tuple->TupleDataLen - 6;
Dominik Brodowski4c89e882008-08-03 10:07:45 +02001186 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187}
1188
1189static int parse_cftable_entry_cb(tuple_t *tuple,
1190 cistpl_cftable_entry_cb_t *entry)
1191{
1192 u_char *p, *q, features;
1193
1194 p = tuple->TupleData;
1195 q = p + tuple->TupleDataLen;
1196 entry->index = *p & 0x3f;
1197 entry->flags = 0;
1198 if (*p & 0x40)
1199 entry->flags |= CISTPL_CFTABLE_DEFAULT;
1200
1201 /* Process optional features */
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001202 if (++p == q)
1203 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204 features = *p; p++;
1205
1206 /* Power options */
1207 if ((features & 3) > 0) {
1208 p = parse_power(p, q, &entry->vcc);
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001209 if (p == NULL)
1210 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001211 } else
1212 entry->vcc.present = 0;
1213 if ((features & 3) > 1) {
1214 p = parse_power(p, q, &entry->vpp1);
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001215 if (p == NULL)
1216 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217 } else
1218 entry->vpp1.present = 0;
1219 if ((features & 3) > 2) {
1220 p = parse_power(p, q, &entry->vpp2);
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001221 if (p == NULL)
1222 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001223 } else
1224 entry->vpp2.present = 0;
1225
1226 /* I/O window options */
1227 if (features & 0x08) {
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001228 if (p == q)
1229 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230 entry->io = *p; p++;
1231 } else
1232 entry->io = 0;
1233
1234 /* Interrupt options */
1235 if (features & 0x10) {
1236 p = parse_irq(p, q, &entry->irq);
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001237 if (p == NULL)
1238 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001239 } else
1240 entry->irq.IRQInfo1 = 0;
1241
1242 if (features & 0x20) {
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001243 if (p == q)
1244 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001245 entry->mem = *p; p++;
1246 } else
1247 entry->mem = 0;
1248
1249 /* Misc features */
1250 if (features & 0x80) {
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001251 if (p == q)
1252 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253 entry->flags |= (*p << 8);
1254 if (*p & 0x80) {
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001255 if (++p == q)
1256 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001257 entry->flags |= (*p << 16);
1258 }
1259 while (*p & 0x80)
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001260 if (++p == q)
1261 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262 p++;
1263 }
1264
1265 entry->subtuples = q-p;
1266
Dominik Brodowski4c89e882008-08-03 10:07:45 +02001267 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268}
1269
1270#endif
1271
1272/*====================================================================*/
1273
1274static int parse_device_geo(tuple_t *tuple, cistpl_device_geo_t *geo)
1275{
1276 u_char *p, *q;
1277 int n;
1278
1279 p = (u_char *)tuple->TupleData;
1280 q = p + tuple->TupleDataLen;
1281
1282 for (n = 0; n < CISTPL_MAX_DEVICES; n++) {
1283 if (p > q-6) break;
1284 geo->geo[n].buswidth = p[0];
1285 geo->geo[n].erase_block = 1 << (p[1]-1);
1286 geo->geo[n].read_block = 1 << (p[2]-1);
1287 geo->geo[n].write_block = 1 << (p[3]-1);
1288 geo->geo[n].partition = 1 << (p[4]-1);
1289 geo->geo[n].interleave = 1 << (p[5]-1);
1290 p += 6;
1291 }
1292 geo->ngeo = n;
Dominik Brodowski4c89e882008-08-03 10:07:45 +02001293 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001294}
1295
1296/*====================================================================*/
1297
1298static int parse_vers_2(tuple_t *tuple, cistpl_vers_2_t *v2)
1299{
1300 u_char *p, *q;
1301
1302 if (tuple->TupleDataLen < 10)
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001303 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001304
1305 p = tuple->TupleData;
1306 q = p + tuple->TupleDataLen;
1307
1308 v2->vers = p[0];
1309 v2->comply = p[1];
Harvey Harrison6b1e6f62008-04-29 01:03:39 -07001310 v2->dindex = get_unaligned_le16(p +2 );
Linus Torvalds1da177e2005-04-16 15:20:36 -07001311 v2->vspec8 = p[6];
1312 v2->vspec9 = p[7];
1313 v2->nhdr = p[8];
1314 p += 9;
1315 return parse_strings(p, q, 2, v2->str, &v2->vendor, NULL);
1316}
1317
1318/*====================================================================*/
1319
1320static int parse_org(tuple_t *tuple, cistpl_org_t *org)
1321{
1322 u_char *p, *q;
1323 int i;
1324
1325 p = tuple->TupleData;
1326 q = p + tuple->TupleDataLen;
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001327 if (p == q)
1328 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001329 org->data_org = *p;
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001330 if (++p == q)
1331 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332 for (i = 0; i < 30; i++) {
1333 org->desc[i] = *p;
1334 if (*p == '\0') break;
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001335 if (++p == q)
1336 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001337 }
Dominik Brodowski4c89e882008-08-03 10:07:45 +02001338 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339}
1340
1341/*====================================================================*/
1342
1343static int parse_format(tuple_t *tuple, cistpl_format_t *fmt)
1344{
1345 u_char *p;
1346
1347 if (tuple->TupleDataLen < 10)
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001348 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001349
1350 p = tuple->TupleData;
1351
1352 fmt->type = p[0];
1353 fmt->edc = p[1];
Harvey Harrison6b1e6f62008-04-29 01:03:39 -07001354 fmt->offset = get_unaligned_le32(p + 2);
1355 fmt->length = get_unaligned_le32(p + 6);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356
Dominik Brodowski4c89e882008-08-03 10:07:45 +02001357 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001358}
1359
1360/*====================================================================*/
1361
Dominik Brodowski2f3061e2008-08-31 15:50:33 +02001362int pcmcia_parse_tuple(tuple_t *tuple, cisparse_t *parse)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001363{
Dominik Brodowski4c89e882008-08-03 10:07:45 +02001364 int ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001365
1366 if (tuple->TupleDataLen > tuple->TupleDataMax)
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001367 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001368 switch (tuple->TupleCode) {
1369 case CISTPL_DEVICE:
1370 case CISTPL_DEVICE_A:
1371 ret = parse_device(tuple, &parse->device);
1372 break;
1373#ifdef CONFIG_CARDBUS
1374 case CISTPL_BAR:
1375 ret = parse_bar(tuple, &parse->bar);
1376 break;
1377 case CISTPL_CONFIG_CB:
1378 ret = parse_config_cb(tuple, &parse->config);
1379 break;
1380 case CISTPL_CFTABLE_ENTRY_CB:
1381 ret = parse_cftable_entry_cb(tuple, &parse->cftable_entry_cb);
1382 break;
1383#endif
1384 case CISTPL_CHECKSUM:
1385 ret = parse_checksum(tuple, &parse->checksum);
1386 break;
1387 case CISTPL_LONGLINK_A:
1388 case CISTPL_LONGLINK_C:
1389 ret = parse_longlink(tuple, &parse->longlink);
1390 break;
1391 case CISTPL_LONGLINK_MFC:
1392 ret = parse_longlink_mfc(tuple, &parse->longlink_mfc);
1393 break;
1394 case CISTPL_VERS_1:
1395 ret = parse_vers_1(tuple, &parse->version_1);
1396 break;
1397 case CISTPL_ALTSTR:
1398 ret = parse_altstr(tuple, &parse->altstr);
1399 break;
1400 case CISTPL_JEDEC_A:
1401 case CISTPL_JEDEC_C:
1402 ret = parse_jedec(tuple, &parse->jedec);
1403 break;
1404 case CISTPL_MANFID:
1405 ret = parse_manfid(tuple, &parse->manfid);
1406 break;
1407 case CISTPL_FUNCID:
1408 ret = parse_funcid(tuple, &parse->funcid);
1409 break;
1410 case CISTPL_FUNCE:
1411 ret = parse_funce(tuple, &parse->funce);
1412 break;
1413 case CISTPL_CONFIG:
1414 ret = parse_config(tuple, &parse->config);
1415 break;
1416 case CISTPL_CFTABLE_ENTRY:
1417 ret = parse_cftable_entry(tuple, &parse->cftable_entry);
1418 break;
1419 case CISTPL_DEVICE_GEO:
1420 case CISTPL_DEVICE_GEO_A:
1421 ret = parse_device_geo(tuple, &parse->device_geo);
1422 break;
1423 case CISTPL_VERS_2:
1424 ret = parse_vers_2(tuple, &parse->vers_2);
1425 break;
1426 case CISTPL_ORG:
1427 ret = parse_org(tuple, &parse->org);
1428 break;
1429 case CISTPL_FORMAT:
1430 case CISTPL_FORMAT_A:
1431 ret = parse_format(tuple, &parse->format);
1432 break;
1433 case CISTPL_NO_LINK:
1434 case CISTPL_LINKTARGET:
Dominik Brodowski4c89e882008-08-03 10:07:45 +02001435 ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001436 break;
1437 default:
Dominik Brodowskide6405e2008-08-03 10:47:59 +02001438 ret = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001439 break;
1440 }
Dominik Brodowski3f9c5f42008-08-03 12:22:40 +02001441 if (ret)
1442 __cs_dbg(0, "parse_tuple failed %d\n", ret);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001443 return ret;
1444}
Dominik Brodowski2f3061e2008-08-31 15:50:33 +02001445EXPORT_SYMBOL(pcmcia_parse_tuple);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446
1447/*======================================================================
1448
1449 This is used internally by Card Services to look up CIS stuff.
1450
1451======================================================================*/
1452
1453int pccard_read_tuple(struct pcmcia_socket *s, unsigned int function, cisdata_t code, void *parse)
1454{
1455 tuple_t tuple;
1456 cisdata_t *buf;
1457 int ret;
1458
1459 buf = kmalloc(256, GFP_KERNEL);
Dominik Brodowski11683862008-08-03 10:22:47 +02001460 if (buf == NULL) {
1461 dev_printk(KERN_WARNING, &s->dev, "no memory to read tuple\n");
1462 return -ENOMEM;
1463 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001464 tuple.DesiredTuple = code;
1465 tuple.Attributes = TUPLE_RETURN_COMMON;
1466 ret = pccard_get_first_tuple(s, function, &tuple);
Dominik Brodowski4c89e882008-08-03 10:07:45 +02001467 if (ret != 0)
1468 goto done;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001469 tuple.TupleData = buf;
1470 tuple.TupleOffset = 0;
1471 tuple.TupleDataMax = 255;
1472 ret = pccard_get_tuple_data(s, &tuple);
Dominik Brodowski4c89e882008-08-03 10:07:45 +02001473 if (ret != 0)
1474 goto done;
Dominik Brodowski2f3061e2008-08-31 15:50:33 +02001475 ret = pcmcia_parse_tuple(&tuple, parse);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001476done:
1477 kfree(buf);
1478 return ret;
1479}
1480EXPORT_SYMBOL(pccard_read_tuple);
1481
1482/*======================================================================
1483
1484 This tries to determine if a card has a sensible CIS. It returns
1485 the number of tuples in the CIS, or 0 if the CIS looks bad. The
1486 checks include making sure several critical tuples are present and
1487 valid; seeing if the total number of tuples is reasonable; and
1488 looking for tuples that use reserved codes.
1489
1490======================================================================*/
1491
Dominik Brodowskic5081d52008-06-19 20:12:34 +02001492int pccard_validate_cis(struct pcmcia_socket *s, unsigned int function, unsigned int *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001493{
1494 tuple_t *tuple;
1495 cisparse_t *p;
Dominik Brodowskic5081d52008-06-19 20:12:34 +02001496 unsigned int count = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001497 int ret, reserved, dev_ok = 0, ident_ok = 0;
1498
1499 if (!s)
Dominik Brodowskiffb8da22008-08-03 11:18:00 +02001500 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001501
1502 tuple = kmalloc(sizeof(*tuple), GFP_KERNEL);
Dominik Brodowski11683862008-08-03 10:22:47 +02001503 if (tuple == NULL) {
1504 dev_printk(KERN_WARNING, &s->dev, "no memory to validate CIS\n");
1505 return -ENOMEM;
1506 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001507 p = kmalloc(sizeof(*p), GFP_KERNEL);
1508 if (p == NULL) {
Dominik Brodowski11683862008-08-03 10:22:47 +02001509 kfree(tuple);
1510 dev_printk(KERN_WARNING, &s->dev, "no memory to validate CIS\n");
1511 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001512 }
1513
Dominik Brodowskic5081d52008-06-19 20:12:34 +02001514 count = reserved = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515 tuple->DesiredTuple = RETURN_FIRST_TUPLE;
1516 tuple->Attributes = TUPLE_RETURN_COMMON;
1517 ret = pccard_get_first_tuple(s, function, tuple);
Dominik Brodowski4c89e882008-08-03 10:07:45 +02001518 if (ret != 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001519 goto done;
1520
1521 /* First tuple should be DEVICE; we should really have either that
1522 or a CFTABLE_ENTRY of some sort */
1523 if ((tuple->TupleCode == CISTPL_DEVICE) ||
Dominik Brodowski4c89e882008-08-03 10:07:45 +02001524 (pccard_read_tuple(s, function, CISTPL_CFTABLE_ENTRY, p) == 0) ||
1525 (pccard_read_tuple(s, function, CISTPL_CFTABLE_ENTRY_CB, p) == 0))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001526 dev_ok++;
1527
1528 /* All cards should have a MANFID tuple, and/or a VERS_1 or VERS_2
1529 tuple, for card identification. Certain old D-Link and Linksys
1530 cards have only a broken VERS_2 tuple; hence the bogus test. */
Dominik Brodowski4c89e882008-08-03 10:07:45 +02001531 if ((pccard_read_tuple(s, function, CISTPL_MANFID, p) == 0) ||
1532 (pccard_read_tuple(s, function, CISTPL_VERS_1, p) == 0) ||
Dominik Brodowski635d19b2008-08-03 11:47:29 +02001533 (pccard_read_tuple(s, function, CISTPL_VERS_2, p) != -ENOSPC))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001534 ident_ok++;
1535
1536 if (!dev_ok && !ident_ok)
1537 goto done;
1538
Dominik Brodowskic5081d52008-06-19 20:12:34 +02001539 for (count = 1; count < MAX_TUPLES; count++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001540 ret = pccard_get_next_tuple(s, function, tuple);
Dominik Brodowski4c89e882008-08-03 10:07:45 +02001541 if (ret != 0)
1542 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001543 if (((tuple->TupleCode > 0x23) && (tuple->TupleCode < 0x40)) ||
1544 ((tuple->TupleCode > 0x47) && (tuple->TupleCode < 0x80)) ||
1545 ((tuple->TupleCode > 0x90) && (tuple->TupleCode < 0xff)))
1546 reserved++;
1547 }
Marc Zyngier002b90a2008-07-15 15:26:15 +02001548 if ((count == MAX_TUPLES) || (reserved > 5) ||
Dominik Brodowskic5081d52008-06-19 20:12:34 +02001549 ((!dev_ok || !ident_ok) && (count > 10)))
1550 count = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001551
1552done:
Dominik Brodowskic5081d52008-06-19 20:12:34 +02001553 if (info)
1554 *info = count;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001555 kfree(tuple);
1556 kfree(p);
Dominik Brodowski4c89e882008-08-03 10:07:45 +02001557 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001558}
1559EXPORT_SYMBOL(pccard_validate_cis);