Define a new 'SCRIPT' type for DFU entities. The downloaded data are treated as simple u-boot's scripts and executed with run_command_list() function.
Flashing the 'SCRIPT' entity might result in changing the 'dfu_alt_info' environment variable from the flashed script, so add a global variable for tracking the potential need to reinitialize the dfu_alt_info related structures.
Signed-off-by: Marek Szyprowski m.szyprowski@samsung.com --- doc/README.dfu | 17 ++++++++++++++++- drivers/dfu/dfu.c | 7 ++++++- drivers/dfu/dfu_mmc.c | 23 +++++++++++++++++++++-- include/dfu.h | 3 +++ 4 files changed, 46 insertions(+), 4 deletions(-)
diff --git a/doc/README.dfu b/doc/README.dfu index 6cb1cba9d7..eacd5bbfb4 100644 --- a/doc/README.dfu +++ b/doc/README.dfu @@ -17,7 +17,7 @@ Overview: - The access to mediums is done in DFU backends (driver/dfu)
Today the supported DFU backends are: - - MMC (RAW or FAT / EXT2 / EXT3 / EXT4 file system / SKIP) + - MMC (RAW or FAT / EXT2 / EXT3 / EXT4 file system / SKIP / SCRIPT) - NAND - RAM - SF (serial flash) @@ -92,6 +92,7 @@ Commands: <name> fat <dev> <part_id> [mmcpart <num>] file in FAT partition <name> ext4 <dev> <part_id> [mmcpart <num>] file in EXT4 partition <name> skip 0 0 ignore flashed data + <name> script 0 0 execute commands in shell
with <partid> being the GPT or DOS partition index, with <num> being the eMMC hardware partition number. @@ -116,6 +117,20 @@ Commands:
"u-boot-<board1>.bin raw 0x80 0x800; u-boot-<board2>.bin skip 0 0"
+ When flashing new system image requires do some more complex things + than just writing data to the storage medium, one can use 'script' + type. Data written to such entity will be executed as a command list + in the u-boot's shell. This for example allows to re-create partition + layout and even set new dfu_alt_info for the newly created paritions. + Such script would look like: + --->8--- + setenv dfu_alt_info ... + setenv mbr_parts ... + mbr write ... + --->8--- + Please note that this means that user will be able to execute any + arbitrary commands just like in the u-boot's shell. + "nand" (raw slc nand device) cmd: dfu 0 nand <dev> each element in "dfu_alt_info" = diff --git a/drivers/dfu/dfu.c b/drivers/dfu/dfu.c index fc32a53323..213a20e7bc 100644 --- a/drivers/dfu/dfu.c +++ b/drivers/dfu/dfu.c @@ -26,6 +26,8 @@ static struct hash_algo *dfu_hash_algo; static unsigned long dfu_timeout = 0; #endif
+bool dfu_reinit_needed = false; + /* * The purpose of the dfu_flush_callback() function is to * provide callback for dfu user @@ -139,6 +141,8 @@ int dfu_init_env_entities(char *interface, char *devstr) char *env_bkp; int ret = 0;
+ dfu_reinit_needed = false; + #ifdef CONFIG_SET_DFU_ALT_INFO set_dfu_alt_info(interface, devstr); #endif @@ -614,7 +618,8 @@ const char *dfu_get_dev_type(enum dfu_device_type t) const char *dfu_get_layout(enum dfu_layout l) { const char *const dfu_layout[] = {NULL, "RAW_ADDR", "FAT", "EXT2", - "EXT3", "EXT4", "RAM_ADDR", "SKIP" }; + "EXT3", "EXT4", "RAM_ADDR", "SKIP", + "SCRIPT" }; return dfu_layout[l]; }
diff --git a/drivers/dfu/dfu_mmc.c b/drivers/dfu/dfu_mmc.c index d1af11d94c..e63fa84ce4 100644 --- a/drivers/dfu/dfu_mmc.c +++ b/drivers/dfu/dfu_mmc.c @@ -16,6 +16,7 @@ #include <fat.h> #include <mmc.h> #include <part.h> +#include <command.h>
static unsigned char *dfu_file_buf; static u64 dfu_file_buf_len; @@ -206,6 +207,9 @@ int dfu_write_medium_mmc(struct dfu_entity *dfu, case DFU_FS_EXT4: ret = mmc_file_buf_write(dfu, offset, buf, len); break; + case DFU_SCRIPT: + ret = run_command_list(buf, *len, 0); + break; case DFU_SKIP: ret = 0; break; @@ -221,9 +225,21 @@ int dfu_flush_medium_mmc(struct dfu_entity *dfu) { int ret = 0;
- if (dfu->layout != DFU_RAW_ADDR) { - /* Do stuff here. */ + switch (dfu->layout) { + case DFU_FS_FAT: + case DFU_FS_EXT4: ret = mmc_file_buf_write_finish(dfu); + break; + case DFU_SCRIPT: + /* script may have changed the dfu_alt_info */ + dfu_reinit_needed = true; + break; + case DFU_RAW_ADDR: + case DFU_SKIP: + break; + default: + printf("%s: Layout (%s) not (yet) supported!\n", __func__, + dfu_get_layout(dfu->layout)); }
return ret; @@ -243,6 +259,7 @@ int dfu_get_medium_size_mmc(struct dfu_entity *dfu, u64 *size) if (ret < 0) return ret; return 0; + case DFU_SCRIPT: case DFU_SKIP: return 0; default: @@ -408,6 +425,8 @@ int dfu_fill_entity_mmc(struct dfu_entity *dfu, char *devstr, char *s) dfu->layout = DFU_FS_EXT4; } else if (!strcmp(entity_type, "skip")) { dfu->layout = DFU_SKIP; + } else if (!strcmp(entity_type, "script")) { + dfu->layout = DFU_SCRIPT; } else { pr_err("Memory layout (%s) not supported!\n", entity_type); return -ENODEV; diff --git a/include/dfu.h b/include/dfu.h index 0b1dae0b3b..d18b701728 100644 --- a/include/dfu.h +++ b/include/dfu.h @@ -34,6 +34,7 @@ enum dfu_layout { DFU_FS_EXT4, DFU_RAM_ADDR, DFU_SKIP, + DFU_SCRIPT, };
enum dfu_op { @@ -497,6 +498,8 @@ static inline int dfu_fill_entity_virt(struct dfu_entity *dfu, char *devstr, } #endif
+extern bool dfu_reinit_needed; + #if CONFIG_IS_ENABLED(DFU_WRITE_ALT) /** * dfu_write_by_name() - write data to DFU medium