cmd_fat: add FAT write command
Once CONFIG_FAT_WRITE is defined, users can invoke 'fatwrite' command
that saves data in RAM as a FAT file.
This patch was originally part of
http://article.gmane.org/gmane.comp.boot-loaders.u-boot/121847
Signed-off-by: Donggeun Kim <dg77.kim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Maximilian Schwerin <mvs@tigris.de>
Signed-off-by: Anatolij Gustschin <agust@denx.de>
diff --git a/README b/README
index b69a3b6..110eac6 100644
--- a/README
+++ b/README
@@ -1233,8 +1233,12 @@
- FAT(File Allocation Table) filesystem write function support:
CONFIG_FAT_WRITE
- Support for saving memory data as a file
- in FAT formatted partition
+
+ Define this to enable support for saving memory data as a
+ file in FAT formatted partition.
+
+ This will also enable the command "fatwrite" enabling the
+ user to write files to FAT.
- Keyboard Support:
CONFIG_ISA_KEYBOARD
diff --git a/common/cmd_fat.c b/common/cmd_fat.c
index 0220494..559a16d 100644
--- a/common/cmd_fat.c
+++ b/common/cmd_fat.c
@@ -184,3 +184,60 @@
"<interface> <dev[:part]>\n"
" - print information about filesystem from 'dev' on 'interface'"
);
+
+#ifdef CONFIG_FAT_WRITE
+static int do_fat_fswrite(cmd_tbl_t *cmdtp, int flag,
+ int argc, char * const argv[])
+{
+ long size;
+ unsigned long addr;
+ unsigned long count;
+ block_dev_desc_t *dev_desc = NULL;
+ int dev = 0;
+ int part = 1;
+ char *ep;
+
+ if (argc < 5)
+ return cmd_usage(cmdtp);
+
+ dev = (int)simple_strtoul(argv[2], &ep, 16);
+ dev_desc = get_dev(argv[1], dev);
+ if (dev_desc == NULL) {
+ puts("\n** Invalid boot device **\n");
+ return 1;
+ }
+ if (*ep) {
+ if (*ep != ':') {
+ puts("\n** Invalid boot device, use `dev[:part]' **\n");
+ return 1;
+ }
+ part = (int)simple_strtoul(++ep, NULL, 16);
+ }
+ if (fat_register_device(dev_desc, part) != 0) {
+ printf("\n** Unable to use %s %d:%d for fatwrite **\n",
+ argv[1], dev, part);
+ return 1;
+ }
+ addr = simple_strtoul(argv[3], NULL, 16);
+ count = simple_strtoul(argv[5], NULL, 16);
+
+ size = file_fat_write(argv[4], (void *)addr, count);
+ if (size == -1) {
+ printf("\n** Unable to write \"%s\" from %s %d:%d **\n",
+ argv[4], argv[1], dev, part);
+ return 1;
+ }
+
+ printf("%ld bytes written\n", size);
+
+ return 0;
+}
+
+U_BOOT_CMD(
+ fatwrite, 6, 0, do_fat_fswrite,
+ "write file into a dos filesystem",
+ "<interface> <dev[:part]> <addr> <filename> <bytes>\n"
+ " - write file 'filename' from the address 'addr' in RAM\n"
+ " to 'dev' on 'interface'"
+);
+#endif