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authorwdenk <wdenk>2003-06-15 22:40:42 +0000
committerwdenk <wdenk>2003-06-15 22:40:42 +0000
commit71f9511803de65a3b98d2f592d418da1d1539f13 (patch)
tree4be38a22fc4f588a80aa8cc350ecd5617a211389 /fs/fat/file.c
parent487778b781257831aa9b9140dd3c7ad4176e8314 (diff)
downloadtalos-obmc-uboot-71f9511803de65a3b98d2f592d418da1d1539f13.tar.gz
talos-obmc-uboot-71f9511803de65a3b98d2f592d418da1d1539f13.zip
* Fix CONFIG_NET_MULTI support in include/net.h
* Patches by Kyle Harris, 13 Mar 2003: - Add FAT partition support - Add command support for FAT - Add command support for MMC ---- - Add Intel PXA support for video - Add Intel PXA support for MMC ---- - Enable MMC and FAT for lubbock board - Other misc changes for lubbock board
Diffstat (limited to 'fs/fat/file.c')
-rw-r--r--fs/fat/file.c208
1 files changed, 208 insertions, 0 deletions
diff --git a/fs/fat/file.c b/fs/fat/file.c
new file mode 100644
index 0000000000..d375ba2eb0
--- /dev/null
+++ b/fs/fat/file.c
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+/*
+ * file.c
+ *
+ * Mini "VFS" by Marcus Sundberg
+ *
+ * 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
+ */
+
+#include <common.h>
+#include <config.h>
+#include <malloc.h>
+#include <fat.h>
+#include <linux/stat.h>
+#include <linux/time.h>
+
+#if (CONFIG_COMMANDS & CFG_CMD_FAT)
+
+/* Supported filesystems */
+static const struct filesystem filesystems[] = {
+ { file_fat_detectfs, file_fat_ls, file_fat_read, "FAT" },
+};
+#define NUM_FILESYS (sizeof(filesystems)/sizeof(struct filesystem))
+
+/* The filesystem which was last detected */
+static int current_filesystem = FSTYPE_NONE;
+
+/* The current working directory */
+#define CWD_LEN 511
+char file_cwd[CWD_LEN+1] = "/";
+
+const char *
+file_getfsname(int idx)
+{
+ if (idx < 0 || idx >= NUM_FILESYS) return NULL;
+
+ return filesystems[idx].name;
+}
+
+
+static void
+pathcpy(char *dest, const char *src)
+{
+ char *origdest = dest;
+
+ do {
+ if (dest-file_cwd >= CWD_LEN) {
+ *dest = '\0';
+ return;
+ }
+ *(dest) = *(src);
+ if (*src == '\0') {
+ if (dest-- != origdest && ISDIRDELIM(*dest)) {
+ *dest = '\0';
+ }
+ return;
+ }
+ ++dest;
+ if (ISDIRDELIM(*src)) {
+ while (ISDIRDELIM(*src)) src++;
+ } else {
+ src++;
+ }
+ } while (1);
+}
+
+
+int
+file_cd(const char *path)
+{
+ if (ISDIRDELIM(*path)) {
+ while (ISDIRDELIM(*path)) path++;
+ strncpy(file_cwd+1, path, CWD_LEN-1);
+ } else {
+ const char *origpath = path;
+ char *tmpstr = file_cwd;
+ int back = 0;
+
+ while (*tmpstr != '\0') tmpstr++;
+ do {
+ tmpstr--;
+ } while (ISDIRDELIM(*tmpstr));
+
+ while (*path == '.') {
+ path++;
+ while (*path == '.') {
+ path++;
+ back++;
+ }
+ if (*path != '\0' && !ISDIRDELIM(*path)) {
+ path = origpath;
+ back = 0;
+ break;
+ }
+ while (ISDIRDELIM(*path)) path++;
+ origpath = path;
+ }
+
+ while (back--) {
+ /* Strip off path component */
+ while (!ISDIRDELIM(*tmpstr)) {
+ tmpstr--;
+ }
+ if (tmpstr == file_cwd) {
+ /* Incremented again right after the loop. */
+ tmpstr--;
+ break;
+ }
+ /* Skip delimiters */
+ while (ISDIRDELIM(*tmpstr)) tmpstr--;
+ }
+ tmpstr++;
+ if (*path == '\0') {
+ if (tmpstr == file_cwd) {
+ *tmpstr = '/';
+ tmpstr++;
+ }
+ *tmpstr = '\0';
+ return 0;
+ }
+ *tmpstr = '/';
+ pathcpy(tmpstr+1, path);
+ }
+
+ return 0;
+}
+
+
+int
+file_detectfs(void)
+{
+ int i;
+
+ current_filesystem = FSTYPE_NONE;
+
+ for (i = 0; i < NUM_FILESYS; i++) {
+ if (filesystems[i].detect() == 0) {
+ strcpy(file_cwd, "/");
+ current_filesystem = i;
+ break;
+ }
+ }
+
+ return current_filesystem;
+}
+
+
+int
+file_ls(const char *dir)
+{
+ char fullpath[1024];
+ const char *arg;
+
+ if (current_filesystem == FSTYPE_NONE) {
+ printf("Can't list files without a filesystem!\n");
+ return -1;
+ }
+
+ if (ISDIRDELIM(*dir)) {
+ arg = dir;
+ } else {
+ sprintf(fullpath, "%s/%s", file_cwd, dir);
+ arg = fullpath;
+ }
+ return filesystems[current_filesystem].ls(arg);
+}
+
+
+long
+file_read(const char *filename, void *buffer, unsigned long maxsize)
+{
+ char fullpath[1024];
+ const char *arg;
+
+ if (current_filesystem == FSTYPE_NONE) {
+ printf("Can't load file without a filesystem!\n");
+ return -1;
+ }
+
+ if (ISDIRDELIM(*filename)) {
+ arg = filename;
+ } else {
+ sprintf(fullpath, "%s/%s", file_cwd, filename);
+ arg = fullpath;
+ }
+
+ return filesystems[current_filesystem].read(arg, buffer, maxsize);
+}
+
+#endif /* #if (CONFIG_COMMANDS & CFG_CMD_FAT) */
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