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wdenk71f95112003-06-15 22:40:42 +00001/*
2 * fat.c
3 *
4 * R/O (V)FAT 12/16/32 filesystem implementation by Marcus Sundberg
5 *
6 * 2002-07-28 - rjones@nexus-tech.net - ported to ppcboot v1.1.6
7 * 2003-03-10 - kharris@nexus-tech.net - ported to uboot
8 *
Wolfgang Denk1a459662013-07-08 09:37:19 +02009 * SPDX-License-Identifier: GPL-2.0+
wdenk71f95112003-06-15 22:40:42 +000010 */
11
12#include <common.h>
13#include <config.h>
Sergei Shtylyovac497772011-08-08 09:38:33 +000014#include <exports.h>
wdenk71f95112003-06-15 22:40:42 +000015#include <fat.h>
16#include <asm/byteorder.h>
wdenk7205e402003-09-10 22:30:53 +000017#include <part.h>
Eric Nelson9a800ac2012-04-11 04:08:53 +000018#include <malloc.h>
19#include <linux/compiler.h>
Richard Genoudfb7e16c2012-12-13 00:47:36 +000020#include <linux/ctype.h>
wdenk71f95112003-06-15 22:40:42 +000021
Richard Genoudcb940c72012-12-13 03:30:10 +000022#ifdef CONFIG_SUPPORT_VFAT
23static const int vfat_enabled = 1;
24#else
25static const int vfat_enabled = 0;
26#endif
27
wdenk71f95112003-06-15 22:40:42 +000028/*
29 * Convert a string to lowercase.
30 */
Benoît Thébaudeau9795e072012-07-20 15:18:44 +020031static void downcase(char *str)
wdenk71f95112003-06-15 22:40:42 +000032{
33 while (*str != '\0') {
Richard Genoudfb7e16c2012-12-13 00:47:36 +000034 *str = tolower(*str);
wdenk71f95112003-06-15 22:40:42 +000035 str++;
36 }
37}
38
Kyle Moffett9813b752011-12-21 07:08:10 +000039static block_dev_desc_t *cur_dev;
Kyle Moffett9813b752011-12-21 07:08:10 +000040static disk_partition_t cur_part_info;
Wolfgang Denk7385c282010-07-19 11:37:00 +020041
Kyle Moffett9813b752011-12-21 07:08:10 +000042#define DOS_BOOT_MAGIC_OFFSET 0x1fe
wdenk7205e402003-09-10 22:30:53 +000043#define DOS_FS_TYPE_OFFSET 0x36
Wolfgang Denk66c2d732010-07-19 11:36:57 +020044#define DOS_FS32_TYPE_OFFSET 0x52
wdenk71f95112003-06-15 22:40:42 +000045
Kyle Moffett9813b752011-12-21 07:08:10 +000046static int disk_read(__u32 block, __u32 nr_blocks, void *buf)
wdenk71f95112003-06-15 22:40:42 +000047{
Kyle Moffett9813b752011-12-21 07:08:10 +000048 if (!cur_dev || !cur_dev->block_read)
wdenk7205e402003-09-10 22:30:53 +000049 return -1;
Wolfgang Denk7385c282010-07-19 11:37:00 +020050
Kyle Moffett9813b752011-12-21 07:08:10 +000051 return cur_dev->block_read(cur_dev->dev,
52 cur_part_info.start + block, nr_blocks, buf);
wdenk71f95112003-06-15 22:40:42 +000053}
54
Stephen Warren5e8f9832012-10-17 06:44:59 +000055int fat_set_blk_dev(block_dev_desc_t *dev_desc, disk_partition_t *info)
wdenk71f95112003-06-15 22:40:42 +000056{
Eric Nelson9a800ac2012-04-11 04:08:53 +000057 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
wdenk7205e402003-09-10 22:30:53 +000058
Stephen Warren5e8f9832012-10-17 06:44:59 +000059 cur_dev = dev_desc;
60 cur_part_info = *info;
Kyle Moffett9813b752011-12-21 07:08:10 +000061
62 /* Make sure it has a valid FAT header */
63 if (disk_read(0, 1, buffer) != 1) {
64 cur_dev = NULL;
65 return -1;
66 }
67
68 /* Check if it's actually a DOS volume */
69 if (memcmp(buffer + DOS_BOOT_MAGIC_OFFSET, "\x55\xAA", 2)) {
70 cur_dev = NULL;
71 return -1;
72 }
73
74 /* Check for FAT12/FAT16/FAT32 filesystem */
75 if (!memcmp(buffer + DOS_FS_TYPE_OFFSET, "FAT", 3))
76 return 0;
77 if (!memcmp(buffer + DOS_FS32_TYPE_OFFSET, "FAT32", 5))
78 return 0;
79
80 cur_dev = NULL;
81 return -1;
wdenk71f95112003-06-15 22:40:42 +000082}
83
Stephen Warren5e8f9832012-10-17 06:44:59 +000084int fat_register_device(block_dev_desc_t *dev_desc, int part_no)
85{
86 disk_partition_t info;
87
88 /* First close any currently found FAT filesystem */
89 cur_dev = NULL;
90
91 /* Read the partition table, if present */
92 if (get_partition_info(dev_desc, part_no, &info)) {
93 if (part_no != 0) {
94 printf("** Partition %d not valid on device %d **\n",
95 part_no, dev_desc->dev);
96 return -1;
97 }
98
99 info.start = 0;
100 info.size = dev_desc->lba;
101 info.blksz = dev_desc->blksz;
102 info.name[0] = 0;
103 info.type[0] = 0;
104 info.bootable = 0;
105#ifdef CONFIG_PARTITION_UUIDS
106 info.uuid[0] = 0;
107#endif
108 }
109
110 return fat_set_blk_dev(dev_desc, &info);
111}
Kyle Moffett9813b752011-12-21 07:08:10 +0000112
wdenk71f95112003-06-15 22:40:42 +0000113/*
114 * Get the first occurence of a directory delimiter ('/' or '\') in a string.
115 * Return index into string if found, -1 otherwise.
116 */
Benoît Thébaudeau9795e072012-07-20 15:18:44 +0200117static int dirdelim(char *str)
wdenk71f95112003-06-15 22:40:42 +0000118{
119 char *start = str;
120
121 while (*str != '\0') {
Wolfgang Denk7385c282010-07-19 11:37:00 +0200122 if (ISDIRDELIM(*str))
123 return str - start;
wdenk71f95112003-06-15 22:40:42 +0000124 str++;
125 }
126 return -1;
127}
128
wdenk71f95112003-06-15 22:40:42 +0000129/*
130 * Extract zero terminated short name from a directory entry.
131 */
Benoît Thébaudeau9795e072012-07-20 15:18:44 +0200132static void get_name(dir_entry *dirent, char *s_name)
wdenk71f95112003-06-15 22:40:42 +0000133{
134 char *ptr;
135
Wolfgang Denk7385c282010-07-19 11:37:00 +0200136 memcpy(s_name, dirent->name, 8);
wdenk71f95112003-06-15 22:40:42 +0000137 s_name[8] = '\0';
138 ptr = s_name;
139 while (*ptr && *ptr != ' ')
140 ptr++;
141 if (dirent->ext[0] && dirent->ext[0] != ' ') {
142 *ptr = '.';
143 ptr++;
Wolfgang Denk7385c282010-07-19 11:37:00 +0200144 memcpy(ptr, dirent->ext, 3);
wdenk71f95112003-06-15 22:40:42 +0000145 ptr[3] = '\0';
146 while (*ptr && *ptr != ' ')
147 ptr++;
148 }
149 *ptr = '\0';
150 if (*s_name == DELETED_FLAG)
151 *s_name = '\0';
152 else if (*s_name == aRING)
Remy Bohmer3c2c2f42008-11-27 22:30:27 +0100153 *s_name = DELETED_FLAG;
Wolfgang Denk7385c282010-07-19 11:37:00 +0200154 downcase(s_name);
wdenk71f95112003-06-15 22:40:42 +0000155}
156
157/*
158 * Get the entry at index 'entry' in a FAT (12/16/32) table.
159 * On failure 0x00 is returned.
160 */
Benoît Thébaudeau9795e072012-07-20 15:18:44 +0200161static __u32 get_fatent(fsdata *mydata, __u32 entry)
wdenk71f95112003-06-15 22:40:42 +0000162{
163 __u32 bufnum;
Wolfgang Denk7385c282010-07-19 11:37:00 +0200164 __u32 off16, offset;
wdenk71f95112003-06-15 22:40:42 +0000165 __u32 ret = 0x00;
Wolfgang Denk7385c282010-07-19 11:37:00 +0200166 __u16 val1, val2;
wdenk71f95112003-06-15 22:40:42 +0000167
168 switch (mydata->fatsize) {
169 case 32:
170 bufnum = entry / FAT32BUFSIZE;
171 offset = entry - bufnum * FAT32BUFSIZE;
172 break;
173 case 16:
174 bufnum = entry / FAT16BUFSIZE;
175 offset = entry - bufnum * FAT16BUFSIZE;
176 break;
177 case 12:
178 bufnum = entry / FAT12BUFSIZE;
179 offset = entry - bufnum * FAT12BUFSIZE;
180 break;
181
182 default:
183 /* Unsupported FAT size */
184 return ret;
185 }
186
Wolfgang Denk7385c282010-07-19 11:37:00 +0200187 debug("FAT%d: entry: 0x%04x = %d, offset: 0x%04x = %d\n",
188 mydata->fatsize, entry, entry, offset, offset);
Wolfgang Denk2aa98c62010-07-19 11:36:58 +0200189
wdenk71f95112003-06-15 22:40:42 +0000190 /* Read a new block of FAT entries into the cache. */
191 if (bufnum != mydata->fatbufnum) {
Sergei Shtylyov60b36f02011-08-08 09:39:29 +0000192 __u32 getsize = FATBUFBLOCKS;
wdenk71f95112003-06-15 22:40:42 +0000193 __u8 *bufptr = mydata->fatbuf;
194 __u32 fatlength = mydata->fatlength;
195 __u32 startblock = bufnum * FATBUFBLOCKS;
196
Benoît Thébaudeau8006dd22012-07-20 15:19:29 +0200197 if (startblock + getsize > fatlength)
198 getsize = fatlength - startblock;
Sergei Shtylyov60b36f02011-08-08 09:39:29 +0000199
wdenk71f95112003-06-15 22:40:42 +0000200 startblock += mydata->fat_sect; /* Offset from start of disk */
201
wdenk71f95112003-06-15 22:40:42 +0000202 if (disk_read(startblock, getsize, bufptr) < 0) {
Wolfgang Denk7385c282010-07-19 11:37:00 +0200203 debug("Error reading FAT blocks\n");
wdenk71f95112003-06-15 22:40:42 +0000204 return ret;
205 }
206 mydata->fatbufnum = bufnum;
207 }
208
209 /* Get the actual entry from the table */
210 switch (mydata->fatsize) {
211 case 32:
Wolfgang Denk7385c282010-07-19 11:37:00 +0200212 ret = FAT2CPU32(((__u32 *) mydata->fatbuf)[offset]);
wdenk71f95112003-06-15 22:40:42 +0000213 break;
214 case 16:
Wolfgang Denk7385c282010-07-19 11:37:00 +0200215 ret = FAT2CPU16(((__u16 *) mydata->fatbuf)[offset]);
wdenk71f95112003-06-15 22:40:42 +0000216 break;
Wolfgang Denk7385c282010-07-19 11:37:00 +0200217 case 12:
218 off16 = (offset * 3) / 4;
wdenk71f95112003-06-15 22:40:42 +0000219
220 switch (offset & 0x3) {
221 case 0:
Wolfgang Denk7385c282010-07-19 11:37:00 +0200222 ret = FAT2CPU16(((__u16 *) mydata->fatbuf)[off16]);
wdenk71f95112003-06-15 22:40:42 +0000223 ret &= 0xfff;
224 break;
225 case 1:
Wolfgang Denk7385c282010-07-19 11:37:00 +0200226 val1 = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16]);
wdenk71f95112003-06-15 22:40:42 +0000227 val1 &= 0xf000;
Wolfgang Denk7385c282010-07-19 11:37:00 +0200228 val2 = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16 + 1]);
wdenk71f95112003-06-15 22:40:42 +0000229 val2 &= 0x00ff;
230 ret = (val2 << 4) | (val1 >> 12);
231 break;
232 case 2:
Wolfgang Denk7385c282010-07-19 11:37:00 +0200233 val1 = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16]);
wdenk71f95112003-06-15 22:40:42 +0000234 val1 &= 0xff00;
Wolfgang Denk7385c282010-07-19 11:37:00 +0200235 val2 = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16 + 1]);
wdenk71f95112003-06-15 22:40:42 +0000236 val2 &= 0x000f;
237 ret = (val2 << 8) | (val1 >> 8);
238 break;
239 case 3:
Wolfgang Denk7385c282010-07-19 11:37:00 +0200240 ret = FAT2CPU16(((__u16 *)mydata->fatbuf)[off16]);
wdenk71f95112003-06-15 22:40:42 +0000241 ret = (ret & 0xfff0) >> 4;
242 break;
243 default:
244 break;
245 }
Wolfgang Denk7385c282010-07-19 11:37:00 +0200246 break;
wdenk71f95112003-06-15 22:40:42 +0000247 }
Wolfgang Denk7385c282010-07-19 11:37:00 +0200248 debug("FAT%d: ret: %08x, offset: %04x\n",
249 mydata->fatsize, ret, offset);
wdenk71f95112003-06-15 22:40:42 +0000250
251 return ret;
252}
253
wdenk71f95112003-06-15 22:40:42 +0000254/*
255 * Read at most 'size' bytes from the specified cluster into 'buffer'.
256 * Return 0 on success, -1 otherwise.
257 */
258static int
Benoît Thébaudeau9795e072012-07-20 15:18:44 +0200259get_cluster(fsdata *mydata, __u32 clustnum, __u8 *buffer, unsigned long size)
wdenk71f95112003-06-15 22:40:42 +0000260{
Erik Hansen3f270f42011-03-24 10:15:37 +0100261 __u32 idx = 0;
wdenk71f95112003-06-15 22:40:42 +0000262 __u32 startsect;
Kyle Moffett46236b12011-12-20 07:41:13 +0000263 int ret;
wdenk71f95112003-06-15 22:40:42 +0000264
265 if (clustnum > 0) {
Wolfgang Denk7385c282010-07-19 11:37:00 +0200266 startsect = mydata->data_begin +
267 clustnum * mydata->clust_size;
wdenk71f95112003-06-15 22:40:42 +0000268 } else {
269 startsect = mydata->rootdir_sect;
270 }
271
Wolfgang Denk7385c282010-07-19 11:37:00 +0200272 debug("gc - clustnum: %d, startsect: %d\n", clustnum, startsect);
273
Benoît Thébaudeaucc63b252012-07-20 15:21:08 +0200274 if ((unsigned long)buffer & (ARCH_DMA_MINALIGN - 1)) {
Eric Nelson9a800ac2012-04-11 04:08:53 +0000275 ALLOC_CACHE_ALIGN_BUFFER(__u8, tmpbuf, mydata->sect_size);
Wolfgang Denk7385c282010-07-19 11:37:00 +0200276
Benoît Thébaudeaucc63b252012-07-20 15:21:08 +0200277 printf("FAT: Misaligned buffer address (%p)\n", buffer);
278
279 while (size >= mydata->sect_size) {
280 ret = disk_read(startsect++, 1, tmpbuf);
281 if (ret != 1) {
282 debug("Error reading data (got %d)\n", ret);
283 return -1;
284 }
285
286 memcpy(buffer, tmpbuf, mydata->sect_size);
287 buffer += mydata->sect_size;
288 size -= mydata->sect_size;
289 }
290 } else {
Sergei Shtylyovac497772011-08-08 09:38:33 +0000291 idx = size / mydata->sect_size;
Benoît Thébaudeaucc63b252012-07-20 15:21:08 +0200292 ret = disk_read(startsect, idx, buffer);
293 if (ret != idx) {
294 debug("Error reading data (got %d)\n", ret);
295 return -1;
296 }
297 startsect += idx;
298 idx *= mydata->sect_size;
299 buffer += idx;
300 size -= idx;
301 }
302 if (size) {
303 ALLOC_CACHE_ALIGN_BUFFER(__u8, tmpbuf, mydata->sect_size);
304
305 ret = disk_read(startsect, 1, tmpbuf);
Kyle Moffett46236b12011-12-20 07:41:13 +0000306 if (ret != 1) {
307 debug("Error reading data (got %d)\n", ret);
wdenk7205e402003-09-10 22:30:53 +0000308 return -1;
wdenk71f95112003-06-15 22:40:42 +0000309 }
wdenk7205e402003-09-10 22:30:53 +0000310
Benoît Thébaudeaucc63b252012-07-20 15:21:08 +0200311 memcpy(buffer, tmpbuf, size);
wdenk71f95112003-06-15 22:40:42 +0000312 }
313
314 return 0;
315}
316
wdenk71f95112003-06-15 22:40:42 +0000317/*
Benoît Thébaudeau1170e632012-09-18 08:14:56 +0000318 * Read at most 'maxsize' bytes from 'pos' in the file associated with 'dentptr'
wdenk71f95112003-06-15 22:40:42 +0000319 * into 'buffer'.
320 * Return the number of bytes read or -1 on fatal errors.
321 */
Benoît Thébaudeau1170e632012-09-18 08:14:56 +0000322__u8 get_contents_vfatname_block[MAX_CLUSTSIZE]
323 __aligned(ARCH_DMA_MINALIGN);
324
wdenk71f95112003-06-15 22:40:42 +0000325static long
Benoît Thébaudeau1170e632012-09-18 08:14:56 +0000326get_contents(fsdata *mydata, dir_entry *dentptr, unsigned long pos,
327 __u8 *buffer, unsigned long maxsize)
wdenk71f95112003-06-15 22:40:42 +0000328{
329 unsigned long filesize = FAT2CPU32(dentptr->size), gotsize = 0;
Sergei Shtylyovac497772011-08-08 09:38:33 +0000330 unsigned int bytesperclust = mydata->clust_size * mydata->sect_size;
wdenk71f95112003-06-15 22:40:42 +0000331 __u32 curclust = START(dentptr);
wdenk7205e402003-09-10 22:30:53 +0000332 __u32 endclust, newclust;
333 unsigned long actsize;
wdenk71f95112003-06-15 22:40:42 +0000334
Wolfgang Denk7385c282010-07-19 11:37:00 +0200335 debug("Filesize: %ld bytes\n", filesize);
wdenk71f95112003-06-15 22:40:42 +0000336
Benoît Thébaudeau1170e632012-09-18 08:14:56 +0000337 if (pos >= filesize) {
338 debug("Read position past EOF: %lu\n", pos);
339 return gotsize;
340 }
341
342 if (maxsize > 0 && filesize > pos + maxsize)
343 filesize = pos + maxsize;
wdenk71f95112003-06-15 22:40:42 +0000344
Wolfgang Denk7385c282010-07-19 11:37:00 +0200345 debug("%ld bytes\n", filesize);
wdenk71f95112003-06-15 22:40:42 +0000346
Wolfgang Denk7385c282010-07-19 11:37:00 +0200347 actsize = bytesperclust;
Benoît Thébaudeau1170e632012-09-18 08:14:56 +0000348
349 /* go to cluster at pos */
350 while (actsize <= pos) {
351 curclust = get_fatent(mydata, curclust);
352 if (CHECK_CLUST(curclust, mydata->fatsize)) {
353 debug("curclust: 0x%x\n", curclust);
354 debug("Invalid FAT entry\n");
355 return gotsize;
356 }
357 actsize += bytesperclust;
358 }
359
360 /* actsize > pos */
361 actsize -= bytesperclust;
362 filesize -= actsize;
363 pos -= actsize;
364
365 /* align to beginning of next cluster if any */
366 if (pos) {
367 actsize = min(filesize, bytesperclust);
368 if (get_cluster(mydata, curclust, get_contents_vfatname_block,
369 (int)actsize) != 0) {
370 printf("Error reading cluster\n");
371 return -1;
372 }
373 filesize -= actsize;
374 actsize -= pos;
375 memcpy(buffer, get_contents_vfatname_block + pos, actsize);
376 gotsize += actsize;
377 if (!filesize)
378 return gotsize;
379 buffer += actsize;
380
381 curclust = get_fatent(mydata, curclust);
382 if (CHECK_CLUST(curclust, mydata->fatsize)) {
383 debug("curclust: 0x%x\n", curclust);
384 debug("Invalid FAT entry\n");
385 return gotsize;
386 }
387 }
388
389 actsize = bytesperclust;
Wolfgang Denk7385c282010-07-19 11:37:00 +0200390 endclust = curclust;
391
wdenk71f95112003-06-15 22:40:42 +0000392 do {
wdenk7205e402003-09-10 22:30:53 +0000393 /* search for consecutive clusters */
Wolfgang Denk7385c282010-07-19 11:37:00 +0200394 while (actsize < filesize) {
wdenk7205e402003-09-10 22:30:53 +0000395 newclust = get_fatent(mydata, endclust);
Wolfgang Denk7385c282010-07-19 11:37:00 +0200396 if ((newclust - 1) != endclust)
wdenk7205e402003-09-10 22:30:53 +0000397 goto getit;
michael8ce4e5c2008-03-02 23:33:46 +0100398 if (CHECK_CLUST(newclust, mydata->fatsize)) {
Wolfgang Denk7385c282010-07-19 11:37:00 +0200399 debug("curclust: 0x%x\n", newclust);
400 debug("Invalid FAT entry\n");
wdenk7205e402003-09-10 22:30:53 +0000401 return gotsize;
402 }
Wolfgang Denk7385c282010-07-19 11:37:00 +0200403 endclust = newclust;
404 actsize += bytesperclust;
wdenk7205e402003-09-10 22:30:53 +0000405 }
Wolfgang Denk7385c282010-07-19 11:37:00 +0200406
wdenk7205e402003-09-10 22:30:53 +0000407 /* get remaining bytes */
Wolfgang Denk7385c282010-07-19 11:37:00 +0200408 actsize = filesize;
Benoît Thébaudeau0880e5b2012-07-20 15:21:37 +0200409 if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) {
Wolfgang Denk7385c282010-07-19 11:37:00 +0200410 printf("Error reading cluster\n");
wdenk7205e402003-09-10 22:30:53 +0000411 return -1;
412 }
Wolfgang Denk7385c282010-07-19 11:37:00 +0200413 gotsize += actsize;
wdenk7205e402003-09-10 22:30:53 +0000414 return gotsize;
415getit:
416 if (get_cluster(mydata, curclust, buffer, (int)actsize) != 0) {
Wolfgang Denk7385c282010-07-19 11:37:00 +0200417 printf("Error reading cluster\n");
wdenk7205e402003-09-10 22:30:53 +0000418 return -1;
419 }
420 gotsize += (int)actsize;
421 filesize -= actsize;
422 buffer += actsize;
Wolfgang Denk7385c282010-07-19 11:37:00 +0200423
wdenk7205e402003-09-10 22:30:53 +0000424 curclust = get_fatent(mydata, endclust);
michael8ce4e5c2008-03-02 23:33:46 +0100425 if (CHECK_CLUST(curclust, mydata->fatsize)) {
Wolfgang Denk7385c282010-07-19 11:37:00 +0200426 debug("curclust: 0x%x\n", curclust);
427 printf("Invalid FAT entry\n");
wdenk71f95112003-06-15 22:40:42 +0000428 return gotsize;
429 }
Wolfgang Denk7385c282010-07-19 11:37:00 +0200430 actsize = bytesperclust;
431 endclust = curclust;
wdenk71f95112003-06-15 22:40:42 +0000432 } while (1);
433}
434
wdenk71f95112003-06-15 22:40:42 +0000435/*
436 * Extract the file name information from 'slotptr' into 'l_name',
437 * starting at l_name[*idx].
438 * Return 1 if terminator (zero byte) is found, 0 otherwise.
439 */
Benoît Thébaudeau9795e072012-07-20 15:18:44 +0200440static int slot2str(dir_slot *slotptr, char *l_name, int *idx)
wdenk71f95112003-06-15 22:40:42 +0000441{
442 int j;
443
444 for (j = 0; j <= 8; j += 2) {
445 l_name[*idx] = slotptr->name0_4[j];
Wolfgang Denk7385c282010-07-19 11:37:00 +0200446 if (l_name[*idx] == 0x00)
447 return 1;
wdenk71f95112003-06-15 22:40:42 +0000448 (*idx)++;
449 }
450 for (j = 0; j <= 10; j += 2) {
451 l_name[*idx] = slotptr->name5_10[j];
Wolfgang Denk7385c282010-07-19 11:37:00 +0200452 if (l_name[*idx] == 0x00)
453 return 1;
wdenk71f95112003-06-15 22:40:42 +0000454 (*idx)++;
455 }
456 for (j = 0; j <= 2; j += 2) {
457 l_name[*idx] = slotptr->name11_12[j];
Wolfgang Denk7385c282010-07-19 11:37:00 +0200458 if (l_name[*idx] == 0x00)
459 return 1;
wdenk71f95112003-06-15 22:40:42 +0000460 (*idx)++;
461 }
462
463 return 0;
464}
465
wdenk71f95112003-06-15 22:40:42 +0000466/*
467 * Extract the full long filename starting at 'retdent' (which is really
468 * a slot) into 'l_name'. If successful also copy the real directory entry
469 * into 'retdent'
470 * Return 0 on success, -1 otherwise.
471 */
472static int
Benoît Thébaudeau9795e072012-07-20 15:18:44 +0200473get_vfatname(fsdata *mydata, int curclust, __u8 *cluster,
474 dir_entry *retdent, char *l_name)
wdenk71f95112003-06-15 22:40:42 +0000475{
476 dir_entry *realdent;
Wolfgang Denk7385c282010-07-19 11:37:00 +0200477 dir_slot *slotptr = (dir_slot *)retdent;
Sergei Shtylyov025421e2011-08-19 09:37:46 +0000478 __u8 *buflimit = cluster + mydata->sect_size * ((curclust == 0) ?
479 PREFETCH_BLOCKS :
480 mydata->clust_size);
Wolfgang Denk7385c282010-07-19 11:37:00 +0200481 __u8 counter = (slotptr->id & ~LAST_LONG_ENTRY_MASK) & 0xff;
wdenk71f95112003-06-15 22:40:42 +0000482 int idx = 0;
483
Mikhail Zolotaryov38315302010-09-08 17:06:03 +0300484 if (counter > VFAT_MAXSEQ) {
485 debug("Error: VFAT name is too long\n");
486 return -1;
487 }
488
489 while ((__u8 *)slotptr < buflimit) {
Wolfgang Denk7385c282010-07-19 11:37:00 +0200490 if (counter == 0)
491 break;
wdenk2d1a5372004-02-23 19:30:57 +0000492 if (((slotptr->id & ~LAST_LONG_ENTRY_MASK) & 0xff) != counter)
493 return -1;
wdenk71f95112003-06-15 22:40:42 +0000494 slotptr++;
495 counter--;
496 }
497
Mikhail Zolotaryov38315302010-09-08 17:06:03 +0300498 if ((__u8 *)slotptr >= buflimit) {
wdenk71f95112003-06-15 22:40:42 +0000499 dir_slot *slotptr2;
500
Mikhail Zolotaryov38315302010-09-08 17:06:03 +0300501 if (curclust == 0)
502 return -1;
wdenk71f95112003-06-15 22:40:42 +0000503 curclust = get_fatent(mydata, curclust);
michael8ce4e5c2008-03-02 23:33:46 +0100504 if (CHECK_CLUST(curclust, mydata->fatsize)) {
Wolfgang Denk7385c282010-07-19 11:37:00 +0200505 debug("curclust: 0x%x\n", curclust);
506 printf("Invalid FAT entry\n");
wdenk71f95112003-06-15 22:40:42 +0000507 return -1;
508 }
Wolfgang Denk7385c282010-07-19 11:37:00 +0200509
Benoît Thébaudeau1170e632012-09-18 08:14:56 +0000510 if (get_cluster(mydata, curclust, get_contents_vfatname_block,
Sergei Shtylyovac497772011-08-08 09:38:33 +0000511 mydata->clust_size * mydata->sect_size) != 0) {
Wolfgang Denk7385c282010-07-19 11:37:00 +0200512 debug("Error: reading directory block\n");
wdenk71f95112003-06-15 22:40:42 +0000513 return -1;
514 }
Wolfgang Denk7385c282010-07-19 11:37:00 +0200515
Benoît Thébaudeau1170e632012-09-18 08:14:56 +0000516 slotptr2 = (dir_slot *)get_contents_vfatname_block;
Mikhail Zolotaryov38315302010-09-08 17:06:03 +0300517 while (counter > 0) {
518 if (((slotptr2->id & ~LAST_LONG_ENTRY_MASK)
519 & 0xff) != counter)
520 return -1;
wdenk71f95112003-06-15 22:40:42 +0000521 slotptr2++;
Mikhail Zolotaryov38315302010-09-08 17:06:03 +0300522 counter--;
523 }
Wolfgang Denk7385c282010-07-19 11:37:00 +0200524
wdenk71f95112003-06-15 22:40:42 +0000525 /* Save the real directory entry */
Mikhail Zolotaryov38315302010-09-08 17:06:03 +0300526 realdent = (dir_entry *)slotptr2;
Benoît Thébaudeau1170e632012-09-18 08:14:56 +0000527 while ((__u8 *)slotptr2 > get_contents_vfatname_block) {
wdenk71f95112003-06-15 22:40:42 +0000528 slotptr2--;
Mikhail Zolotaryov38315302010-09-08 17:06:03 +0300529 slot2str(slotptr2, l_name, &idx);
wdenk71f95112003-06-15 22:40:42 +0000530 }
531 } else {
532 /* Save the real directory entry */
Wolfgang Denk7385c282010-07-19 11:37:00 +0200533 realdent = (dir_entry *)slotptr;
wdenk71f95112003-06-15 22:40:42 +0000534 }
535
536 do {
537 slotptr--;
Wolfgang Denk7385c282010-07-19 11:37:00 +0200538 if (slot2str(slotptr, l_name, &idx))
539 break;
wdenk2d1a5372004-02-23 19:30:57 +0000540 } while (!(slotptr->id & LAST_LONG_ENTRY_MASK));
wdenk71f95112003-06-15 22:40:42 +0000541
542 l_name[idx] = '\0';
Wolfgang Denk7385c282010-07-19 11:37:00 +0200543 if (*l_name == DELETED_FLAG)
544 *l_name = '\0';
545 else if (*l_name == aRING)
546 *l_name = DELETED_FLAG;
wdenk71f95112003-06-15 22:40:42 +0000547 downcase(l_name);
548
549 /* Return the real directory entry */
550 memcpy(retdent, realdent, sizeof(dir_entry));
551
552 return 0;
553}
554
wdenk71f95112003-06-15 22:40:42 +0000555/* Calculate short name checksum */
Marek Vasutff04f6d2012-10-09 07:20:22 +0000556static __u8 mkcksum(const char name[8], const char ext[3])
wdenk71f95112003-06-15 22:40:42 +0000557{
558 int i;
Wolfgang Denk7385c282010-07-19 11:37:00 +0200559
wdenk71f95112003-06-15 22:40:42 +0000560 __u8 ret = 0;
561
Marek Vasut6ad77d82013-01-11 03:35:48 +0000562 for (i = 0; i < 8; i++)
Marek Vasutff04f6d2012-10-09 07:20:22 +0000563 ret = (((ret & 1) << 7) | ((ret & 0xfe) >> 1)) + name[i];
Marek Vasut6ad77d82013-01-11 03:35:48 +0000564 for (i = 0; i < 3; i++)
Marek Vasutff04f6d2012-10-09 07:20:22 +0000565 ret = (((ret & 1) << 7) | ((ret & 0xfe) >> 1)) + ext[i];
wdenk71f95112003-06-15 22:40:42 +0000566
567 return ret;
568}
wdenk71f95112003-06-15 22:40:42 +0000569
570/*
571 * Get the directory entry associated with 'filename' from the directory
572 * starting at 'startsect'
573 */
Eric Nelson9a800ac2012-04-11 04:08:53 +0000574__u8 get_dentfromdir_block[MAX_CLUSTSIZE]
575 __aligned(ARCH_DMA_MINALIGN);
Wolfgang Denk7385c282010-07-19 11:37:00 +0200576
Benoît Thébaudeau9795e072012-07-20 15:18:44 +0200577static dir_entry *get_dentfromdir(fsdata *mydata, int startsect,
578 char *filename, dir_entry *retdent,
579 int dols)
wdenk71f95112003-06-15 22:40:42 +0000580{
Wolfgang Denk7385c282010-07-19 11:37:00 +0200581 __u16 prevcksum = 0xffff;
582 __u32 curclust = START(retdent);
583 int files = 0, dirs = 0;
wdenk71f95112003-06-15 22:40:42 +0000584
Wolfgang Denk7385c282010-07-19 11:37:00 +0200585 debug("get_dentfromdir: %s\n", filename);
wdenk71f95112003-06-15 22:40:42 +0000586
Wolfgang Denk7385c282010-07-19 11:37:00 +0200587 while (1) {
588 dir_entry *dentptr;
wdenk71f95112003-06-15 22:40:42 +0000589
Wolfgang Denk7385c282010-07-19 11:37:00 +0200590 int i;
wdenk71f95112003-06-15 22:40:42 +0000591
Wolfgang Denk7385c282010-07-19 11:37:00 +0200592 if (get_cluster(mydata, curclust, get_dentfromdir_block,
Sergei Shtylyovac497772011-08-08 09:38:33 +0000593 mydata->clust_size * mydata->sect_size) != 0) {
Wolfgang Denk7385c282010-07-19 11:37:00 +0200594 debug("Error: reading directory block\n");
595 return NULL;
596 }
597
598 dentptr = (dir_entry *)get_dentfromdir_block;
599
600 for (i = 0; i < DIRENTSPERCLUST; i++) {
Mikhail Zolotaryov38315302010-09-08 17:06:03 +0300601 char s_name[14], l_name[VFAT_MAXLEN_BYTES];
Wolfgang Denk7385c282010-07-19 11:37:00 +0200602
603 l_name[0] = '\0';
604 if (dentptr->name[0] == DELETED_FLAG) {
605 dentptr++;
606 continue;
wdenk71f95112003-06-15 22:40:42 +0000607 }
Wolfgang Denk7385c282010-07-19 11:37:00 +0200608 if ((dentptr->attr & ATTR_VOLUME)) {
Richard Genoudcb940c72012-12-13 03:30:10 +0000609 if (vfat_enabled &&
610 (dentptr->attr & ATTR_VFAT) == ATTR_VFAT &&
J. Vijayanand206d68f2011-10-19 07:43:08 +0000611 (dentptr->name[0] & LAST_LONG_ENTRY_MASK)) {
Wolfgang Denk7385c282010-07-19 11:37:00 +0200612 prevcksum = ((dir_slot *)dentptr)->alias_checksum;
613 get_vfatname(mydata, curclust,
614 get_dentfromdir_block,
615 dentptr, l_name);
616 if (dols) {
617 int isdir;
618 char dirc;
619 int doit = 0;
620
621 isdir = (dentptr->attr & ATTR_DIR);
622
623 if (isdir) {
624 dirs++;
625 dirc = '/';
626 doit = 1;
627 } else {
628 dirc = ' ';
629 if (l_name[0] != 0) {
630 files++;
631 doit = 1;
632 }
633 }
634 if (doit) {
635 if (dirc == ' ') {
636 printf(" %8ld %s%c\n",
637 (long)FAT2CPU32(dentptr->size),
638 l_name,
639 dirc);
640 } else {
641 printf(" %s%c\n",
642 l_name,
643 dirc);
644 }
645 }
646 dentptr++;
647 continue;
648 }
649 debug("vfatname: |%s|\n", l_name);
Richard Genoudcb940c72012-12-13 03:30:10 +0000650 } else {
Wolfgang Denk7385c282010-07-19 11:37:00 +0200651 /* Volume label or VFAT entry */
652 dentptr++;
653 continue;
654 }
655 }
656 if (dentptr->name[0] == 0) {
657 if (dols) {
658 printf("\n%d file(s), %d dir(s)\n\n",
659 files, dirs);
660 }
661 debug("Dentname == NULL - %d\n", i);
662 return NULL;
663 }
Richard Genoudcb940c72012-12-13 03:30:10 +0000664 if (vfat_enabled) {
665 __u8 csum = mkcksum(dentptr->name, dentptr->ext);
666 if (dols && csum == prevcksum) {
667 prevcksum = 0xffff;
668 dentptr++;
669 continue;
670 }
Wolfgang Denk7385c282010-07-19 11:37:00 +0200671 }
Richard Genoudcb940c72012-12-13 03:30:10 +0000672
Wolfgang Denk7385c282010-07-19 11:37:00 +0200673 get_name(dentptr, s_name);
674 if (dols) {
675 int isdir = (dentptr->attr & ATTR_DIR);
676 char dirc;
677 int doit = 0;
wdenk71f95112003-06-15 22:40:42 +0000678
Wolfgang Denk7385c282010-07-19 11:37:00 +0200679 if (isdir) {
680 dirs++;
681 dirc = '/';
682 doit = 1;
683 } else {
684 dirc = ' ';
685 if (s_name[0] != 0) {
686 files++;
687 doit = 1;
688 }
689 }
690
691 if (doit) {
692 if (dirc == ' ') {
693 printf(" %8ld %s%c\n",
694 (long)FAT2CPU32(dentptr->size),
695 s_name, dirc);
696 } else {
697 printf(" %s%c\n",
698 s_name, dirc);
699 }
700 }
701
702 dentptr++;
703 continue;
704 }
705
706 if (strcmp(filename, s_name)
707 && strcmp(filename, l_name)) {
708 debug("Mismatch: |%s|%s|\n", s_name, l_name);
709 dentptr++;
710 continue;
711 }
712
713 memcpy(retdent, dentptr, sizeof(dir_entry));
714
715 debug("DentName: %s", s_name);
716 debug(", start: 0x%x", START(dentptr));
717 debug(", size: 0x%x %s\n",
718 FAT2CPU32(dentptr->size),
719 (dentptr->attr & ATTR_DIR) ? "(DIR)" : "");
720
721 return retdent;
wdenk71f95112003-06-15 22:40:42 +0000722 }
Wolfgang Denk7385c282010-07-19 11:37:00 +0200723
724 curclust = get_fatent(mydata, curclust);
725 if (CHECK_CLUST(curclust, mydata->fatsize)) {
726 debug("curclust: 0x%x\n", curclust);
727 printf("Invalid FAT entry\n");
728 return NULL;
wdenk71f95112003-06-15 22:40:42 +0000729 }
wdenk71f95112003-06-15 22:40:42 +0000730 }
wdenk71f95112003-06-15 22:40:42 +0000731
Wolfgang Denk7385c282010-07-19 11:37:00 +0200732 return NULL;
wdenk71f95112003-06-15 22:40:42 +0000733}
734
wdenk71f95112003-06-15 22:40:42 +0000735/*
736 * Read boot sector and volume info from a FAT filesystem
737 */
738static int
Benoît Thébaudeau9795e072012-07-20 15:18:44 +0200739read_bootsectandvi(boot_sector *bs, volume_info *volinfo, int *fatsize)
wdenk71f95112003-06-15 22:40:42 +0000740{
Sergei Shtylyovac497772011-08-08 09:38:33 +0000741 __u8 *block;
wdenk71f95112003-06-15 22:40:42 +0000742 volume_info *vistart;
Sergei Shtylyovac497772011-08-08 09:38:33 +0000743 int ret = 0;
744
745 if (cur_dev == NULL) {
746 debug("Error: no device selected\n");
747 return -1;
748 }
749
Eric Nelson9a800ac2012-04-11 04:08:53 +0000750 block = memalign(ARCH_DMA_MINALIGN, cur_dev->blksz);
Sergei Shtylyovac497772011-08-08 09:38:33 +0000751 if (block == NULL) {
752 debug("Error: allocating block\n");
753 return -1;
754 }
wdenk71f95112003-06-15 22:40:42 +0000755
Benoît Thébaudeau9795e072012-07-20 15:18:44 +0200756 if (disk_read(0, 1, block) < 0) {
Wolfgang Denk7385c282010-07-19 11:37:00 +0200757 debug("Error: reading block\n");
Sergei Shtylyovac497772011-08-08 09:38:33 +0000758 goto fail;
wdenk71f95112003-06-15 22:40:42 +0000759 }
760
761 memcpy(bs, block, sizeof(boot_sector));
Wolfgang Denk7385c282010-07-19 11:37:00 +0200762 bs->reserved = FAT2CPU16(bs->reserved);
763 bs->fat_length = FAT2CPU16(bs->fat_length);
764 bs->secs_track = FAT2CPU16(bs->secs_track);
765 bs->heads = FAT2CPU16(bs->heads);
766 bs->total_sect = FAT2CPU32(bs->total_sect);
wdenk71f95112003-06-15 22:40:42 +0000767
768 /* FAT32 entries */
769 if (bs->fat_length == 0) {
770 /* Assume FAT32 */
771 bs->fat32_length = FAT2CPU32(bs->fat32_length);
Wolfgang Denk7385c282010-07-19 11:37:00 +0200772 bs->flags = FAT2CPU16(bs->flags);
wdenk71f95112003-06-15 22:40:42 +0000773 bs->root_cluster = FAT2CPU32(bs->root_cluster);
Wolfgang Denk7385c282010-07-19 11:37:00 +0200774 bs->info_sector = FAT2CPU16(bs->info_sector);
775 bs->backup_boot = FAT2CPU16(bs->backup_boot);
776 vistart = (volume_info *)(block + sizeof(boot_sector));
wdenk71f95112003-06-15 22:40:42 +0000777 *fatsize = 32;
778 } else {
Wolfgang Denk7385c282010-07-19 11:37:00 +0200779 vistart = (volume_info *)&(bs->fat32_length);
wdenk71f95112003-06-15 22:40:42 +0000780 *fatsize = 0;
781 }
782 memcpy(volinfo, vistart, sizeof(volume_info));
783
wdenk71f95112003-06-15 22:40:42 +0000784 if (*fatsize == 32) {
Wolfgang Denk7385c282010-07-19 11:37:00 +0200785 if (strncmp(FAT32_SIGN, vistart->fs_type, SIGNLEN) == 0)
Sergei Shtylyovac497772011-08-08 09:38:33 +0000786 goto exit;
wdenk71f95112003-06-15 22:40:42 +0000787 } else {
Tom Rix651351f2009-05-20 07:55:41 -0500788 if (strncmp(FAT12_SIGN, vistart->fs_type, SIGNLEN) == 0) {
wdenk71f95112003-06-15 22:40:42 +0000789 *fatsize = 12;
Sergei Shtylyovac497772011-08-08 09:38:33 +0000790 goto exit;
wdenk71f95112003-06-15 22:40:42 +0000791 }
Tom Rix651351f2009-05-20 07:55:41 -0500792 if (strncmp(FAT16_SIGN, vistart->fs_type, SIGNLEN) == 0) {
wdenk71f95112003-06-15 22:40:42 +0000793 *fatsize = 16;
Sergei Shtylyovac497772011-08-08 09:38:33 +0000794 goto exit;
wdenk71f95112003-06-15 22:40:42 +0000795 }
796 }
797
Wolfgang Denk7385c282010-07-19 11:37:00 +0200798 debug("Error: broken fs_type sign\n");
Sergei Shtylyovac497772011-08-08 09:38:33 +0000799fail:
800 ret = -1;
801exit:
802 free(block);
803 return ret;
wdenk71f95112003-06-15 22:40:42 +0000804}
805
Benoît Thébaudeau1170e632012-09-18 08:14:56 +0000806__u8 do_fat_read_at_block[MAX_CLUSTSIZE]
Eric Nelson9a800ac2012-04-11 04:08:53 +0000807 __aligned(ARCH_DMA_MINALIGN);
Wolfgang Denk7385c282010-07-19 11:37:00 +0200808
stroese20cc00d2004-12-16 17:57:26 +0000809long
Benoît Thébaudeau1170e632012-09-18 08:14:56 +0000810do_fat_read_at(const char *filename, unsigned long pos, void *buffer,
811 unsigned long maxsize, int dols)
wdenk71f95112003-06-15 22:40:42 +0000812{
Wolfgang Denk7385c282010-07-19 11:37:00 +0200813 char fnamecopy[2048];
814 boot_sector bs;
815 volume_info volinfo;
816 fsdata datablock;
817 fsdata *mydata = &datablock;
Benoît Thébaudeaucd1b0422012-07-20 15:20:12 +0200818 dir_entry *dentptr = NULL;
Wolfgang Denk7385c282010-07-19 11:37:00 +0200819 __u16 prevcksum = 0xffff;
820 char *subname = "";
Erik Hansen3f270f42011-03-24 10:15:37 +0100821 __u32 cursect;
Wolfgang Denk7385c282010-07-19 11:37:00 +0200822 int idx, isdir = 0;
823 int files = 0, dirs = 0;
Sergei Shtylyovac497772011-08-08 09:38:33 +0000824 long ret = -1;
Wolfgang Denk7385c282010-07-19 11:37:00 +0200825 int firsttime;
Sergei Shtylyov40e21912011-08-19 09:32:34 +0000826 __u32 root_cluster = 0;
Erik Hansen3f270f42011-03-24 10:15:37 +0100827 int rootdir_size = 0;
Wolfgang Denk7385c282010-07-19 11:37:00 +0200828 int j;
wdenk71f95112003-06-15 22:40:42 +0000829
Wolfgang Denk7385c282010-07-19 11:37:00 +0200830 if (read_bootsectandvi(&bs, &volinfo, &mydata->fatsize)) {
831 debug("Error: reading boot sector\n");
832 return -1;
833 }
834
Sergei Shtylyov40e21912011-08-19 09:32:34 +0000835 if (mydata->fatsize == 32) {
836 root_cluster = bs.root_cluster;
Wolfgang Denk7385c282010-07-19 11:37:00 +0200837 mydata->fatlength = bs.fat32_length;
Sergei Shtylyov40e21912011-08-19 09:32:34 +0000838 } else {
Wolfgang Denk7385c282010-07-19 11:37:00 +0200839 mydata->fatlength = bs.fat_length;
Sergei Shtylyov40e21912011-08-19 09:32:34 +0000840 }
wdenk71f95112003-06-15 22:40:42 +0000841
Wolfgang Denk7385c282010-07-19 11:37:00 +0200842 mydata->fat_sect = bs.reserved;
wdenk71f95112003-06-15 22:40:42 +0000843
Wolfgang Denk7385c282010-07-19 11:37:00 +0200844 cursect = mydata->rootdir_sect
845 = mydata->fat_sect + mydata->fatlength * bs.fats;
wdenk71f95112003-06-15 22:40:42 +0000846
Sergei Shtylyovac497772011-08-08 09:38:33 +0000847 mydata->sect_size = (bs.sector_size[1] << 8) + bs.sector_size[0];
Wolfgang Denk7385c282010-07-19 11:37:00 +0200848 mydata->clust_size = bs.cluster_size;
Kyle Moffett46236b12011-12-20 07:41:13 +0000849 if (mydata->sect_size != cur_part_info.blksz) {
850 printf("Error: FAT sector size mismatch (fs=%hu, dev=%lu)\n",
851 mydata->sect_size, cur_part_info.blksz);
852 return -1;
853 }
wdenk71f95112003-06-15 22:40:42 +0000854
Wolfgang Denk7385c282010-07-19 11:37:00 +0200855 if (mydata->fatsize == 32) {
856 mydata->data_begin = mydata->rootdir_sect -
857 (mydata->clust_size * 2);
858 } else {
Wolfgang Denk7385c282010-07-19 11:37:00 +0200859 rootdir_size = ((bs.dir_entries[1] * (int)256 +
860 bs.dir_entries[0]) *
861 sizeof(dir_entry)) /
Sergei Shtylyovac497772011-08-08 09:38:33 +0000862 mydata->sect_size;
Wolfgang Denk7385c282010-07-19 11:37:00 +0200863 mydata->data_begin = mydata->rootdir_sect +
864 rootdir_size -
865 (mydata->clust_size * 2);
wdenk71f95112003-06-15 22:40:42 +0000866 }
wdenk71f95112003-06-15 22:40:42 +0000867
Wolfgang Denk7385c282010-07-19 11:37:00 +0200868 mydata->fatbufnum = -1;
Eric Nelson9a800ac2012-04-11 04:08:53 +0000869 mydata->fatbuf = memalign(ARCH_DMA_MINALIGN, FATBUFSIZE);
Sergei Shtylyovac497772011-08-08 09:38:33 +0000870 if (mydata->fatbuf == NULL) {
871 debug("Error: allocating memory\n");
872 return -1;
873 }
Wolfgang Denk7385c282010-07-19 11:37:00 +0200874
Richard Genoudcb940c72012-12-13 03:30:10 +0000875 if (vfat_enabled)
876 debug("VFAT Support enabled\n");
877
Wolfgang Denk7385c282010-07-19 11:37:00 +0200878 debug("FAT%d, fat_sect: %d, fatlength: %d\n",
879 mydata->fatsize, mydata->fat_sect, mydata->fatlength);
880 debug("Rootdir begins at cluster: %d, sector: %d, offset: %x\n"
881 "Data begins at: %d\n",
882 root_cluster,
883 mydata->rootdir_sect,
Sergei Shtylyovac497772011-08-08 09:38:33 +0000884 mydata->rootdir_sect * mydata->sect_size, mydata->data_begin);
885 debug("Sector size: %d, cluster size: %d\n", mydata->sect_size,
886 mydata->clust_size);
Wolfgang Denk7385c282010-07-19 11:37:00 +0200887
888 /* "cwd" is always the root... */
889 while (ISDIRDELIM(*filename))
890 filename++;
891
892 /* Make a copy of the filename and convert it to lowercase */
893 strcpy(fnamecopy, filename);
894 downcase(fnamecopy);
895
896 if (*fnamecopy == '\0') {
897 if (!dols)
Sergei Shtylyovac497772011-08-08 09:38:33 +0000898 goto exit;
Wolfgang Denk7385c282010-07-19 11:37:00 +0200899
900 dols = LS_ROOT;
901 } else if ((idx = dirdelim(fnamecopy)) >= 0) {
902 isdir = 1;
903 fnamecopy[idx] = '\0';
904 subname = fnamecopy + idx + 1;
905
906 /* Handle multiple delimiters */
907 while (ISDIRDELIM(*subname))
908 subname++;
909 } else if (dols) {
910 isdir = 1;
911 }
912
913 j = 0;
914 while (1) {
915 int i;
916
Benoît Thébaudeaucd1b0422012-07-20 15:20:12 +0200917 if (j == 0) {
918 debug("FAT read sect=%d, clust_size=%d, DIRENTSPERBLOCK=%zd\n",
919 cursect, mydata->clust_size, DIRENTSPERBLOCK);
Wolfgang Denk7385c282010-07-19 11:37:00 +0200920
Benoît Thébaudeaucd1b0422012-07-20 15:20:12 +0200921 if (disk_read(cursect,
922 (mydata->fatsize == 32) ?
923 (mydata->clust_size) :
924 PREFETCH_BLOCKS,
Benoît Thébaudeau1170e632012-09-18 08:14:56 +0000925 do_fat_read_at_block) < 0) {
Benoît Thébaudeaucd1b0422012-07-20 15:20:12 +0200926 debug("Error: reading rootdir block\n");
927 goto exit;
928 }
929
Benoît Thébaudeau1170e632012-09-18 08:14:56 +0000930 dentptr = (dir_entry *) do_fat_read_at_block;
wdenk71f95112003-06-15 22:40:42 +0000931 }
Wolfgang Denk7385c282010-07-19 11:37:00 +0200932
Wolfgang Denk7385c282010-07-19 11:37:00 +0200933 for (i = 0; i < DIRENTSPERBLOCK; i++) {
Mikhail Zolotaryov38315302010-09-08 17:06:03 +0300934 char s_name[14], l_name[VFAT_MAXLEN_BYTES];
Marek Vasutff04f6d2012-10-09 07:20:22 +0000935 __u8 csum;
Wolfgang Denk7385c282010-07-19 11:37:00 +0200936
937 l_name[0] = '\0';
Mikhail Zolotaryov38315302010-09-08 17:06:03 +0300938 if (dentptr->name[0] == DELETED_FLAG) {
939 dentptr++;
940 continue;
941 }
Marek Vasutff04f6d2012-10-09 07:20:22 +0000942
Richard Genoudcb940c72012-12-13 03:30:10 +0000943 if (vfat_enabled)
944 csum = mkcksum(dentptr->name, dentptr->ext);
945
Marek Vasutff04f6d2012-10-09 07:20:22 +0000946 if (dentptr->attr & ATTR_VOLUME) {
Richard Genoudcb940c72012-12-13 03:30:10 +0000947 if (vfat_enabled &&
948 (dentptr->attr & ATTR_VFAT) == ATTR_VFAT &&
Wolfgang Denk7385c282010-07-19 11:37:00 +0200949 (dentptr->name[0] & LAST_LONG_ENTRY_MASK)) {
950 prevcksum =
951 ((dir_slot *)dentptr)->alias_checksum;
wdenk71f95112003-06-15 22:40:42 +0000952
Mikhail Zolotaryov38315302010-09-08 17:06:03 +0300953 get_vfatname(mydata,
Sergei Shtylyov40e21912011-08-19 09:32:34 +0000954 root_cluster,
Benoît Thébaudeau1170e632012-09-18 08:14:56 +0000955 do_fat_read_at_block,
Wolfgang Denk7385c282010-07-19 11:37:00 +0200956 dentptr, l_name);
957
958 if (dols == LS_ROOT) {
959 char dirc;
960 int doit = 0;
961 int isdir =
962 (dentptr->attr & ATTR_DIR);
963
964 if (isdir) {
965 dirs++;
966 dirc = '/';
967 doit = 1;
968 } else {
969 dirc = ' ';
970 if (l_name[0] != 0) {
971 files++;
972 doit = 1;
973 }
974 }
975 if (doit) {
976 if (dirc == ' ') {
977 printf(" %8ld %s%c\n",
978 (long)FAT2CPU32(dentptr->size),
979 l_name,
980 dirc);
981 } else {
982 printf(" %s%c\n",
983 l_name,
984 dirc);
985 }
986 }
987 dentptr++;
988 continue;
989 }
990 debug("Rootvfatname: |%s|\n",
991 l_name);
Richard Genoudcb940c72012-12-13 03:30:10 +0000992 } else {
Wolfgang Denk7385c282010-07-19 11:37:00 +0200993 /* Volume label or VFAT entry */
994 dentptr++;
995 continue;
996 }
997 } else if (dentptr->name[0] == 0) {
998 debug("RootDentname == NULL - %d\n", i);
999 if (dols == LS_ROOT) {
1000 printf("\n%d file(s), %d dir(s)\n\n",
1001 files, dirs);
Sergei Shtylyovac497772011-08-08 09:38:33 +00001002 ret = 0;
Wolfgang Denk7385c282010-07-19 11:37:00 +02001003 }
Sergei Shtylyovac497772011-08-08 09:38:33 +00001004 goto exit;
Wolfgang Denk7385c282010-07-19 11:37:00 +02001005 }
Richard Genoudcb940c72012-12-13 03:30:10 +00001006 else if (vfat_enabled &&
1007 dols == LS_ROOT && csum == prevcksum) {
Sergei Shtylyovbf34e7d2012-01-02 06:54:29 +00001008 prevcksum = 0xffff;
Wolfgang Denk7385c282010-07-19 11:37:00 +02001009 dentptr++;
1010 continue;
1011 }
Richard Genoudcb940c72012-12-13 03:30:10 +00001012
Wolfgang Denk7385c282010-07-19 11:37:00 +02001013 get_name(dentptr, s_name);
1014
1015 if (dols == LS_ROOT) {
1016 int isdir = (dentptr->attr & ATTR_DIR);
1017 char dirc;
1018 int doit = 0;
1019
1020 if (isdir) {
1021 dirc = '/';
1022 if (s_name[0] != 0) {
1023 dirs++;
1024 doit = 1;
1025 }
1026 } else {
1027 dirc = ' ';
1028 if (s_name[0] != 0) {
1029 files++;
1030 doit = 1;
1031 }
1032 }
1033 if (doit) {
1034 if (dirc == ' ') {
1035 printf(" %8ld %s%c\n",
1036 (long)FAT2CPU32(dentptr->size),
1037 s_name, dirc);
1038 } else {
1039 printf(" %s%c\n",
1040 s_name, dirc);
1041 }
1042 }
1043 dentptr++;
1044 continue;
1045 }
1046
1047 if (strcmp(fnamecopy, s_name)
1048 && strcmp(fnamecopy, l_name)) {
1049 debug("RootMismatch: |%s|%s|\n", s_name,
1050 l_name);
1051 dentptr++;
1052 continue;
1053 }
1054
1055 if (isdir && !(dentptr->attr & ATTR_DIR))
Sergei Shtylyovac497772011-08-08 09:38:33 +00001056 goto exit;
Wolfgang Denk7385c282010-07-19 11:37:00 +02001057
1058 debug("RootName: %s", s_name);
1059 debug(", start: 0x%x", START(dentptr));
1060 debug(", size: 0x%x %s\n",
1061 FAT2CPU32(dentptr->size),
1062 isdir ? "(DIR)" : "");
1063
1064 goto rootdir_done; /* We got a match */
1065 }
1066 debug("END LOOP: j=%d clust_size=%d\n", j,
1067 mydata->clust_size);
1068
1069 /*
1070 * On FAT32 we must fetch the FAT entries for the next
1071 * root directory clusters when a cluster has been
1072 * completely processed.
1073 */
Erik Hansen3f270f42011-03-24 10:15:37 +01001074 ++j;
Benoît Thébaudeaucd1b0422012-07-20 15:20:12 +02001075 int rootdir_end = 0;
1076 if (mydata->fatsize == 32) {
1077 if (j == mydata->clust_size) {
1078 int nxtsect = 0;
1079 int nxt_clust = 0;
Wolfgang Denk7385c282010-07-19 11:37:00 +02001080
Benoît Thébaudeaucd1b0422012-07-20 15:20:12 +02001081 nxt_clust = get_fatent(mydata, root_cluster);
1082 rootdir_end = CHECK_CLUST(nxt_clust, 32);
Wolfgang Denk7385c282010-07-19 11:37:00 +02001083
Benoît Thébaudeaucd1b0422012-07-20 15:20:12 +02001084 nxtsect = mydata->data_begin +
1085 (nxt_clust * mydata->clust_size);
Wolfgang Denk7385c282010-07-19 11:37:00 +02001086
Benoît Thébaudeaucd1b0422012-07-20 15:20:12 +02001087 root_cluster = nxt_clust;
Wolfgang Denk7385c282010-07-19 11:37:00 +02001088
Benoît Thébaudeaucd1b0422012-07-20 15:20:12 +02001089 cursect = nxtsect;
1090 j = 0;
1091 }
wdenk71f95112003-06-15 22:40:42 +00001092 } else {
Benoît Thébaudeaucd1b0422012-07-20 15:20:12 +02001093 if (j == PREFETCH_BLOCKS)
1094 j = 0;
1095
1096 rootdir_end = (++cursect - mydata->rootdir_sect >=
1097 rootdir_size);
wdenk71f95112003-06-15 22:40:42 +00001098 }
Erik Hansen3f270f42011-03-24 10:15:37 +01001099
1100 /* If end of rootdir reached */
Benoît Thébaudeaucd1b0422012-07-20 15:20:12 +02001101 if (rootdir_end) {
Erik Hansen3f270f42011-03-24 10:15:37 +01001102 if (dols == LS_ROOT) {
1103 printf("\n%d file(s), %d dir(s)\n\n",
1104 files, dirs);
Sergei Shtylyovac497772011-08-08 09:38:33 +00001105 ret = 0;
Erik Hansen3f270f42011-03-24 10:15:37 +01001106 }
Sergei Shtylyovac497772011-08-08 09:38:33 +00001107 goto exit;
Erik Hansen3f270f42011-03-24 10:15:37 +01001108 }
Wolfgang Denk7385c282010-07-19 11:37:00 +02001109 }
1110rootdir_done:
1111
1112 firsttime = 1;
1113
1114 while (isdir) {
1115 int startsect = mydata->data_begin
1116 + START(dentptr) * mydata->clust_size;
1117 dir_entry dent;
1118 char *nextname = NULL;
1119
1120 dent = *dentptr;
1121 dentptr = &dent;
1122
1123 idx = dirdelim(subname);
1124
1125 if (idx >= 0) {
1126 subname[idx] = '\0';
1127 nextname = subname + idx + 1;
1128 /* Handle multiple delimiters */
1129 while (ISDIRDELIM(*nextname))
1130 nextname++;
1131 if (dols && *nextname == '\0')
1132 firsttime = 0;
1133 } else {
1134 if (dols && firsttime) {
1135 firsttime = 0;
1136 } else {
1137 isdir = 0;
1138 }
wdenk71f95112003-06-15 22:40:42 +00001139 }
wdenk71f95112003-06-15 22:40:42 +00001140
Wolfgang Denk7385c282010-07-19 11:37:00 +02001141 if (get_dentfromdir(mydata, startsect, subname, dentptr,
1142 isdir ? 0 : dols) == NULL) {
1143 if (dols && !isdir)
Sergei Shtylyovac497772011-08-08 09:38:33 +00001144 ret = 0;
1145 goto exit;
Wolfgang Denk7385c282010-07-19 11:37:00 +02001146 }
wdenk71f95112003-06-15 22:40:42 +00001147
Benoît Thébaudeau7ee46ce2012-07-20 03:20:29 +00001148 if (isdir && !(dentptr->attr & ATTR_DIR))
1149 goto exit;
1150
1151 if (idx >= 0)
Wolfgang Denk7385c282010-07-19 11:37:00 +02001152 subname = nextname;
wdenk71f95112003-06-15 22:40:42 +00001153 }
1154
Benoît Thébaudeau1170e632012-09-18 08:14:56 +00001155 ret = get_contents(mydata, dentptr, pos, buffer, maxsize);
Wolfgang Denk7385c282010-07-19 11:37:00 +02001156 debug("Size: %d, got: %ld\n", FAT2CPU32(dentptr->size), ret);
wdenk71f95112003-06-15 22:40:42 +00001157
Sergei Shtylyovac497772011-08-08 09:38:33 +00001158exit:
1159 free(mydata->fatbuf);
Wolfgang Denk7385c282010-07-19 11:37:00 +02001160 return ret;
wdenk71f95112003-06-15 22:40:42 +00001161}
1162
Benoît Thébaudeau1170e632012-09-18 08:14:56 +00001163long
1164do_fat_read(const char *filename, void *buffer, unsigned long maxsize, int dols)
1165{
1166 return do_fat_read_at(filename, 0, buffer, maxsize, dols);
1167}
1168
Benoît Thébaudeau9795e072012-07-20 15:18:44 +02001169int file_fat_detectfs(void)
wdenk71f95112003-06-15 22:40:42 +00001170{
Wolfgang Denk7385c282010-07-19 11:37:00 +02001171 boot_sector bs;
1172 volume_info volinfo;
1173 int fatsize;
1174 char vol_label[12];
wdenk71f95112003-06-15 22:40:42 +00001175
Wolfgang Denk7385c282010-07-19 11:37:00 +02001176 if (cur_dev == NULL) {
wdenk7205e402003-09-10 22:30:53 +00001177 printf("No current device\n");
1178 return 1;
1179 }
Wolfgang Denk7385c282010-07-19 11:37:00 +02001180
Jon Loeligerdd60d122007-07-09 17:56:50 -05001181#if defined(CONFIG_CMD_IDE) || \
Sonic Zhang8c5170a2008-12-09 23:20:18 -05001182 defined(CONFIG_CMD_SATA) || \
Jon Loeligerdd60d122007-07-09 17:56:50 -05001183 defined(CONFIG_CMD_SCSI) || \
1184 defined(CONFIG_CMD_USB) || \
Andy Fleming21f6f962008-01-16 13:06:59 -06001185 defined(CONFIG_MMC)
wdenk7205e402003-09-10 22:30:53 +00001186 printf("Interface: ");
Wolfgang Denk7385c282010-07-19 11:37:00 +02001187 switch (cur_dev->if_type) {
1188 case IF_TYPE_IDE:
1189 printf("IDE");
1190 break;
1191 case IF_TYPE_SATA:
1192 printf("SATA");
1193 break;
1194 case IF_TYPE_SCSI:
1195 printf("SCSI");
1196 break;
1197 case IF_TYPE_ATAPI:
1198 printf("ATAPI");
1199 break;
1200 case IF_TYPE_USB:
1201 printf("USB");
1202 break;
1203 case IF_TYPE_DOC:
1204 printf("DOC");
1205 break;
1206 case IF_TYPE_MMC:
1207 printf("MMC");
1208 break;
1209 default:
1210 printf("Unknown");
wdenk7205e402003-09-10 22:30:53 +00001211 }
Wolfgang Denk7385c282010-07-19 11:37:00 +02001212
1213 printf("\n Device %d: ", cur_dev->dev);
wdenk7205e402003-09-10 22:30:53 +00001214 dev_print(cur_dev);
1215#endif
Wolfgang Denk7385c282010-07-19 11:37:00 +02001216
1217 if (read_bootsectandvi(&bs, &volinfo, &fatsize)) {
wdenk7205e402003-09-10 22:30:53 +00001218 printf("\nNo valid FAT fs found\n");
1219 return 1;
1220 }
Wolfgang Denk7385c282010-07-19 11:37:00 +02001221
1222 memcpy(vol_label, volinfo.volume_label, 11);
wdenk7205e402003-09-10 22:30:53 +00001223 vol_label[11] = '\0';
Wolfgang Denk7385c282010-07-19 11:37:00 +02001224 volinfo.fs_type[5] = '\0';
1225
Stephen Warren461f86e2012-10-17 06:44:57 +00001226 printf("Filesystem: %s \"%s\"\n", volinfo.fs_type, vol_label);
Wolfgang Denk7385c282010-07-19 11:37:00 +02001227
wdenk7205e402003-09-10 22:30:53 +00001228 return 0;
wdenk71f95112003-06-15 22:40:42 +00001229}
1230
Benoît Thébaudeau9795e072012-07-20 15:18:44 +02001231int file_fat_ls(const char *dir)
wdenk71f95112003-06-15 22:40:42 +00001232{
1233 return do_fat_read(dir, NULL, 0, LS_YES);
1234}
1235
Benoît Thébaudeau1170e632012-09-18 08:14:56 +00001236long file_fat_read_at(const char *filename, unsigned long pos, void *buffer,
1237 unsigned long maxsize)
wdenk71f95112003-06-15 22:40:42 +00001238{
Wolfgang Denk7385c282010-07-19 11:37:00 +02001239 printf("reading %s\n", filename);
Benoît Thébaudeau1170e632012-09-18 08:14:56 +00001240 return do_fat_read_at(filename, pos, buffer, maxsize, LS_NO);
1241}
1242
1243long file_fat_read(const char *filename, void *buffer, unsigned long maxsize)
1244{
1245 return file_fat_read_at(filename, 0, buffer, maxsize);
wdenk71f95112003-06-15 22:40:42 +00001246}
Simon Glasse6d52412012-12-26 09:53:33 +00001247
1248int fat_read_file(const char *filename, void *buf, int offset, int len)
1249{
1250 int len_read;
1251
1252 len_read = file_fat_read_at(filename, offset, buf, len);
1253 if (len_read == -1) {
1254 printf("** Unable to read file %s **\n", filename);
1255 return -1;
1256 }
1257
1258 return len_read;
1259}
1260
1261void fat_close(void)
1262{
1263}