Once CONFIG_FAT_WRITE is defined, users can invoke 'fatwrite' command that saves data in RAM as a FAT file.
This patch also removes compile error after patch of 'fs/fat: Fix FAT detection to support non-DOS partition tables'.
Signed-off-by: Donggeun Kim dg77.kim@samsung.com Signed-off-by: Kyungmin Park kyungmin.park@samsung.com --- Changes for v4: - fix compile error in fs/fat_write.c file 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_write.c | 20 +++++++----------- 2 files changed, 65 insertions(+), 12 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_write.c b/fs/fat/fat_write.c index 3bfc1c4..16f8400 100644 --- a/fs/fat/fat_write.c +++ b/fs/fat/fat_write.c @@ -41,23 +41,19 @@ static void uppercase(char *str, int len) }
static int total_sector; -static int disk_write(__u32 startblock, __u32 getsize, __u8 *bufptr) +static int disk_write(__u32 block, __u32 nr_blocks, void *buf) { - if (cur_dev == NULL) + if (!cur_dev || !cur_dev->block_write) return -1;
- if (startblock + getsize > total_sector) { + if (cur_part_info.start + block + nr_blocks > + cur_part_info.start + total_sector) { printf("error: overflow occurs\n"); return -1; }
- startblock += part_offset; - - if (cur_dev->block_read) { - return cur_dev->block_write(cur_dev->dev, startblock, getsize, - (unsigned long *) bufptr); - } - return -1; + return cur_dev->block_write(cur_dev->dev, + cur_part_info.start + block, nr_blocks, buf); }
/* @@ -797,7 +793,7 @@ static int check_overflow(fsdata *mydata, __u32 clustnum, unsigned long size) if (size % mydata->sect_size) sect_num++;
- if (startsect + sect_num > total_sector) + if (startsect + sect_num > cur_part_info.start + total_sector) return -1;
return 0; @@ -947,7 +943,7 @@ static int do_fat_write(const char *filename, void *buffer,
total_sector = bs.total_sect; if (total_sector == 0) - total_sector = part_size; + total_sector = cur_part_info.size;
root_cluster = bs.root_cluster;