[PATCH] fastboot: Add OEM run command

[Sean Anderson]

This adds the UUU UCmd functionality as an OEM command. While the
fastboot tool allows sending arbitrary commands as long as they are
prefixed with "oem". This allows running generic U-Boot commands over
fastboot without UUU, which is especially useful when not using USB.
This is really the route we should have gone in the first place when
adding these commands.

While we're here, clean up the Kconfig a bit.

Signed-off-by: Sean Anderson <sean.anderson at seco.com>
---

 doc/android/fastboot.rst      |  1 +
 drivers/fastboot/Kconfig      | 10 +++++-----
 drivers/fastboot/fb_command.c |  4 ++++
 include/fastboot.h            |  1 +
 4 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/doc/android/fastboot.rst b/doc/android/fastboot.rst
index 7611f07038..b2d2e68cf5 100644
--- a/doc/android/fastboot.rst
+++ b/doc/android/fastboot.rst
@@ -28,6 +28,7 @@ The following OEM commands are supported (if enabled):
 - ``oem partconf`` - this executes ``mmc partconf %x <arg> 0`` to configure eMMC
   with <arg> = boot_ack boot_partition
 - ``oem bootbus``  - this executes ``mmc bootbus %x %s`` to configure eMMC
+- ``oem run`` - this executes an arbitrary U-Boot command
 
 Support for both eMMC and NAND devices is included.
 
diff --git a/drivers/fastboot/Kconfig b/drivers/fastboot/Kconfig
index b97c67bf60..8f2d52cb8a 100644
--- a/drivers/fastboot/Kconfig
+++ b/drivers/fastboot/Kconfig
@@ -80,12 +80,12 @@ config FASTBOOT_FLASH
 	  this to enable the "fastboot flash" command.
 
 config FASTBOOT_UUU_SUPPORT
-	bool "Enable FASTBOOT i.MX UUU special command"
+	bool "Enable running arbitrary commands from FASTBOOT"
 	help
-	  The fastboot protocol includes "UCmd" and "ACmd" command.
-	  Be aware that you provide full access to any U-Boot command,
-	  including working with memory and may open a huge backdoor,
-	  when enabling this option.
+	  This extends the fastboot protocol with the "UCmd" and "ACmd"
+	  commands, as well as the "oem run" command.  These commands provide
+	  full access to any U-Boot command, including working with memory.
+	  This may open a huge backdoor if you are using verified boot.
 
 choice
 	prompt "Flash provider for FASTBOOT"
diff --git a/drivers/fastboot/fb_command.c b/drivers/fastboot/fb_command.c
index 98eccc3455..1732406c18 100644
--- a/drivers/fastboot/fb_command.c
+++ b/drivers/fastboot/fb_command.c
@@ -123,6 +123,10 @@ static const struct {
 	},
 #endif
 #if CONFIG_IS_ENABLED(FASTBOOT_UUU_SUPPORT)
+	[FASTBOOT_COMMAND_OEM_RUN] = {
+		.command = "oem run",
+		.dispatch = run_ucmd,
+	},
 	[FASTBOOT_COMMAND_UCMD] = {
 		.command = "UCmd",
 		.dispatch = run_ucmd,
diff --git a/include/fastboot.h b/include/fastboot.h
index 57daaf1298..8b6b4b934a 100644
--- a/include/fastboot.h
+++ b/include/fastboot.h
@@ -45,6 +45,7 @@ enum {
 	FASTBOOT_COMMAND_OEM_BOOTBUS,
 #endif
 #if CONFIG_IS_ENABLED(FASTBOOT_UUU_SUPPORT)
+	FASTBOOT_COMMAND_OEM_RUN,
 	FASTBOOT_COMMAND_ACMD,
 	FASTBOOT_COMMAND_UCMD,
 #endif
-- 
2.35.1.1320.gc452695387.dirty