X-Git-Url: https://git.kernelconcepts.de/?a=blobdiff_plain;f=fs%2Ffat%2Ffat.c;h=54f42eae0d05eec8d456bde67d2f52122d23d369;hb=b7b5f3195fa5a31ab1505e0c87054dc6dc71627b;hp=4a60a2503e7733461a8b75866b236cce77e19c81;hpb=f04821a8ca714459481bd9fd315af2b5f92d99a6;p=karo-tx-uboot.git diff --git a/fs/fat/fat.c b/fs/fat/fat.c index 4a60a2503e..54f42eae0d 100644 --- a/fs/fat/fat.c +++ b/fs/fat/fat.c @@ -6,23 +6,7 @@ * 2002-07-28 - rjones@nexus-tech.net - ported to ppcboot v1.1.6 * 2003-03-10 - kharris@nexus-tech.net - ported to uboot * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA + * SPDX-License-Identifier: GPL-2.0+ */ #include @@ -33,6 +17,13 @@ #include #include #include +#include + +#ifdef CONFIG_SUPPORT_VFAT +static const int vfat_enabled = 1; +#else +static const int vfat_enabled = 0; +#endif /* * Convert a string to lowercase. @@ -40,13 +31,12 @@ static void downcase(char *str) { while (*str != '\0') { - TOLOWER(*str); + *str = tolower(*str); str++; } } static block_dev_desc_t *cur_dev; -static unsigned int cur_part_nr; static disk_partition_t cur_part_info; #define DOS_BOOT_MAGIC_OFFSET 0x1fe @@ -62,43 +52,12 @@ static int disk_read(__u32 block, __u32 nr_blocks, void *buf) cur_part_info.start + block, nr_blocks, buf); } -int fat_register_device(block_dev_desc_t * dev_desc, int part_no) +int fat_set_blk_dev(block_dev_desc_t *dev_desc, disk_partition_t *info) { ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); - /* First close any currently found FAT filesystem */ - cur_dev = NULL; - -#if (defined(CONFIG_CMD_IDE) || \ - defined(CONFIG_CMD_SATA) || \ - defined(CONFIG_CMD_SCSI) || \ - defined(CONFIG_CMD_USB) || \ - defined(CONFIG_MMC) || \ - defined(CONFIG_SYSTEMACE) ) - - /* Read the partition table, if present */ - if (!get_partition_info(dev_desc, part_no, &cur_part_info)) { - cur_dev = dev_desc; - cur_part_nr = part_no; - } -#endif - - /* Otherwise it might be a superfloppy (whole-disk FAT filesystem) */ - if (!cur_dev) { - if (part_no != 0) { - printf("** Partition %d not valid on device %d **\n", - part_no, dev_desc->dev); - return -1; - } - - cur_dev = dev_desc; - cur_part_nr = 1; - cur_part_info.start = 0; - cur_part_info.size = dev_desc->lba; - cur_part_info.blksz = dev_desc->blksz; - memset(cur_part_info.name, 0, sizeof(cur_part_info.name)); - memset(cur_part_info.type, 0, sizeof(cur_part_info.type)); - } + cur_dev = dev_desc; + cur_part_info = *info; /* Make sure it has a valid FAT header */ if (disk_read(0, 1, buffer) != 1) { @@ -122,6 +81,34 @@ int fat_register_device(block_dev_desc_t * dev_desc, int part_no) return -1; } +int fat_register_device(block_dev_desc_t *dev_desc, int part_no) +{ + disk_partition_t info; + + /* First close any currently found FAT filesystem */ + cur_dev = NULL; + + /* Read the partition table, if present */ + if (get_partition_info(dev_desc, part_no, &info)) { + if (part_no != 0) { + printf("** Partition %d not valid on device %d **\n", + part_no, dev_desc->dev); + return -1; + } + + info.start = 0; + info.size = dev_desc->lba; + info.blksz = dev_desc->blksz; + info.name[0] = 0; + info.type[0] = 0; + info.bootable = 0; +#ifdef CONFIG_PARTITION_UUIDS + info.uuid[0] = 0; +#endif + } + + return fat_set_blk_dev(dev_desc, &info); +} /* * Get the first occurence of a directory delimiter ('/' or '\') in a string. @@ -445,7 +432,6 @@ getit: } while (1); } -#ifdef CONFIG_SUPPORT_VFAT /* * Extract the file name information from 'slotptr' into 'l_name', * starting at l_name[*idx]. @@ -573,14 +559,13 @@ static __u8 mkcksum(const char name[8], const char ext[3]) __u8 ret = 0; - for (i = 0; i < sizeof(name); i++) + for (i = 0; i < 8; i++) ret = (((ret & 1) << 7) | ((ret & 0xfe) >> 1)) + name[i]; - for (i = 0; i < sizeof(ext); i++) + for (i = 0; i < 3; i++) ret = (((ret & 1) << 7) | ((ret & 0xfe) >> 1)) + ext[i]; return ret; } -#endif /* CONFIG_SUPPORT_VFAT */ /* * Get the directory entry associated with 'filename' from the directory @@ -621,8 +606,8 @@ static dir_entry *get_dentfromdir(fsdata *mydata, int startsect, continue; } if ((dentptr->attr & ATTR_VOLUME)) { -#ifdef CONFIG_SUPPORT_VFAT - if ((dentptr->attr & ATTR_VFAT) == ATTR_VFAT && + if (vfat_enabled && + (dentptr->attr & ATTR_VFAT) == ATTR_VFAT && (dentptr->name[0] & LAST_LONG_ENTRY_MASK)) { prevcksum = ((dir_slot *)dentptr)->alias_checksum; get_vfatname(mydata, curclust, @@ -662,9 +647,7 @@ static dir_entry *get_dentfromdir(fsdata *mydata, int startsect, continue; } debug("vfatname: |%s|\n", l_name); - } else -#endif - { + } else { /* Volume label or VFAT entry */ dentptr++; continue; @@ -678,14 +661,15 @@ static dir_entry *get_dentfromdir(fsdata *mydata, int startsect, debug("Dentname == NULL - %d\n", i); return NULL; } -#ifdef CONFIG_SUPPORT_VFAT - __u8 csum = mkcksum(dentptr->name, dentptr->ext); - if (dols && csum == prevcksum) { - prevcksum = 0xffff; - dentptr++; - continue; + if (vfat_enabled) { + __u8 csum = mkcksum(dentptr->name, dentptr->ext); + if (dols && csum == prevcksum) { + prevcksum = 0xffff; + dentptr++; + continue; + } } -#endif + get_name(dentptr, s_name); if (dols) { int isdir = (dentptr->attr & ATTR_DIR); @@ -824,7 +808,7 @@ __u8 do_fat_read_at_block[MAX_CLUSTSIZE] long do_fat_read_at(const char *filename, unsigned long pos, void *buffer, - unsigned long maxsize, int dols) + unsigned long maxsize, int dols, int dogetsize) { char fnamecopy[2048]; boot_sector bs; @@ -888,9 +872,9 @@ do_fat_read_at(const char *filename, unsigned long pos, void *buffer, return -1; } -#ifdef CONFIG_SUPPORT_VFAT - debug("VFAT Support enabled\n"); -#endif + if (vfat_enabled) + debug("VFAT Support enabled\n"); + debug("FAT%d, fat_sect: %d, fatlength: %d\n", mydata->fatsize, mydata->fat_sect, mydata->fatlength); debug("Rootdir begins at cluster: %d, sector: %d, offset: %x\n" @@ -956,10 +940,12 @@ do_fat_read_at(const char *filename, unsigned long pos, void *buffer, continue; } - csum = mkcksum(dentptr->name, dentptr->ext); + if (vfat_enabled) + csum = mkcksum(dentptr->name, dentptr->ext); + if (dentptr->attr & ATTR_VOLUME) { -#ifdef CONFIG_SUPPORT_VFAT - if ((dentptr->attr & ATTR_VFAT) == ATTR_VFAT && + if (vfat_enabled && + (dentptr->attr & ATTR_VFAT) == ATTR_VFAT && (dentptr->name[0] & LAST_LONG_ENTRY_MASK)) { prevcksum = ((dir_slot *)dentptr)->alias_checksum; @@ -1003,9 +989,7 @@ do_fat_read_at(const char *filename, unsigned long pos, void *buffer, } debug("Rootvfatname: |%s|\n", l_name); - } else -#endif - { + } else { /* Volume label or VFAT entry */ dentptr++; continue; @@ -1019,13 +1003,13 @@ do_fat_read_at(const char *filename, unsigned long pos, void *buffer, } goto exit; } -#ifdef CONFIG_SUPPORT_VFAT - else if (dols == LS_ROOT && csum == prevcksum) { + else if (vfat_enabled && + dols == LS_ROOT && csum == prevcksum) { prevcksum = 0xffff; dentptr++; continue; } -#endif + get_name(dentptr, s_name); if (dols == LS_ROOT) { @@ -1168,7 +1152,10 @@ rootdir_done: subname = nextname; } - ret = get_contents(mydata, dentptr, pos, buffer, maxsize); + if (dogetsize) + ret = FAT2CPU32(dentptr->size); + else + ret = get_contents(mydata, dentptr, pos, buffer, maxsize); debug("Size: %d, got: %ld\n", FAT2CPU32(dentptr->size), ret); exit: @@ -1179,7 +1166,7 @@ exit: long do_fat_read(const char *filename, void *buffer, unsigned long maxsize, int dols) { - return do_fat_read_at(filename, 0, buffer, maxsize, dols); + return do_fat_read_at(filename, 0, buffer, maxsize, dols, 0); } int file_fat_detectfs(void) @@ -1239,8 +1226,7 @@ int file_fat_detectfs(void) vol_label[11] = '\0'; volinfo.fs_type[5] = '\0'; - printf("Partition %d: Filesystem: %s \"%s\"\n", cur_part_nr, - volinfo.fs_type, vol_label); + printf("Filesystem: %s \"%s\"\n", volinfo.fs_type, vol_label); return 0; } @@ -1250,14 +1236,38 @@ int file_fat_ls(const char *dir) return do_fat_read(dir, NULL, 0, LS_YES); } +int fat_exists(const char *filename) +{ + int sz; + sz = do_fat_read_at(filename, 0, NULL, 0, LS_NO, 1); + return sz >= 0; +} + long file_fat_read_at(const char *filename, unsigned long pos, void *buffer, unsigned long maxsize) { printf("reading %s\n", filename); - return do_fat_read_at(filename, pos, buffer, maxsize, LS_NO); + return do_fat_read_at(filename, pos, buffer, maxsize, LS_NO, 0); } long file_fat_read(const char *filename, void *buffer, unsigned long maxsize) { return file_fat_read_at(filename, 0, buffer, maxsize); } + +int fat_read_file(const char *filename, void *buf, int offset, int len) +{ + int len_read; + + len_read = file_fat_read_at(filename, offset, buf, len); + if (len_read == -1) { + printf("** Unable to read file %s **\n", filename); + return -1; + } + + return len_read; +} + +void fat_close(void) +{ +}