Once CONFIG_FAT_WRITE is defined, users can invoke 'fatwrite' command that saves data in RAM as a FAT file.
By removing variable of 'part_size' in fs/fat.c, compile error occurs when enabling FAT write feature. The variable should be declared only when CONFIG_FAT_WRITE is defined. This patch also removes compile error when FAT write is enabled and compile warning when FAT write is disabled.
Signed-off-by: Donggeun Kim dg77.kim@samsung.com Signed-off-by: Kyungmin Park kyungmin.park@samsung.com --- Changes for v3: - use cmd_usage function Changes for v2: - merge the patch that fixes compile error when enabling FAT write - change do_fat_fswrite to be static function
common/cmd_fat.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ fs/fat/fat.c | 7 ++++++ 2 files changed, 64 insertions(+), 0 deletions(-)
diff --git a/common/cmd_fat.c b/common/cmd_fat.c index 0220494..fef1c82 100644 --- a/common/cmd_fat.c +++ b/common/cmd_fat.c @@ -184,3 +184,60 @@ U_BOOT_CMD( "<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 write\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 diff --git a/fs/fat/fat.c b/fs/fat/fat.c index 9a29458..40c0538 100644 --- a/fs/fat/fat.c +++ b/fs/fat/fat.c @@ -47,6 +47,10 @@ static block_dev_desc_t *cur_dev = NULL;
static unsigned long part_offset = 0;
+#ifdef CONFIG_FAT_WRITE +static unsigned long part_size; +#endif + static int cur_part = 1;
#define DOS_PART_TBL_OFFSET 0x1be @@ -101,6 +105,9 @@ int fat_register_device (block_dev_desc_t * dev_desc, int part_no) if (!get_partition_info(dev_desc, part_no, &info)) { part_offset = info.start; cur_part = part_no; +#ifdef CONFIG_FAT_WRITE + part_size = info.size; +#endif } else if ((strncmp((char *)&buffer[DOS_FS_TYPE_OFFSET], "FAT", 3) == 0) || (strncmp((char *)&buffer[DOS_FS32_TYPE_OFFSET],