From 656f4c653785eb3fac84796da5d3bc04c4918290 Mon Sep 17 00:00:00 2001 From: Donggeun Kim Date: Thu, 22 Mar 2012 04:38:56 +0000 Subject: [PATCH] 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 Signed-off-by: Kyungmin Park Signed-off-by: Maximilian Schwerin Signed-off-by: Anatolij Gustschin --- README | 8 +++++-- common/cmd_fat.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 63 insertions(+), 2 deletions(-) diff --git a/README b/README index b69a3b6f6e..110eac6f16 100644 --- a/README +++ b/README @@ -1233,8 +1233,12 @@ The following options need to be configured: - 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 0220494343..559a16d619 100644 --- a/common/cmd_fat.c +++ b/common/cmd_fat.c @@ -184,3 +184,60 @@ U_BOOT_CMD( " \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", + " \n" + " - write file 'filename' from the address 'addr' in RAM\n" + " to 'dev' on 'interface'" +); +#endif