[U-Boot] [PATCH v4 2/5] usb/gadget: fastboot: add support for flash command

Steve Rae
2014-08-06T23:55:10Z

- implement 'fastboot flash' for eMMC devices

Signed-off-by: Steve Rae <srae@broadcom.com>
Reviewed-by: Marek Vasut <marex@denx.de>
---

Changes in v4: None
Changes in v3: None
Changes in v2:
- update README.android-fastboot file

README | 10 ++++++++++
doc/README.android-fastboot | 5 +++--
drivers/usb/gadget/f_fastboot.c | 31 +++++++++++++++++++++++++++++++
3 files changed, 44 insertions(+), 2 deletions(-)

diff --git a/README b/README
index 1d71359..ed26884 100644
--- a/README
+++ b/README
@@ -1623,6 +1623,16 @@ The following options need to be configured:
downloads. This buffer should be as large as possible for a
platform. Define this to the size available RAM for fastboot.

+ CONFIG_FASTBOOT_FLASH
+ The fastboot protocol includes a "flash" command for writing
+ the downloaded image to a non-volatile storage device. Define
+ this to enable the "fastboot flash" command.
+
+ CONFIG_FASTBOOT_FLASH_MMC_DEV
+ The fastboot "flash" command requires addition information
+ regarding the non-volatile storage device. Define this to
+ the eMMC device that fastboot should use to store the image.
+
- Journaling Flash filesystem support:
CONFIG_JFFS2_NAND, CONFIG_JFFS2_NAND_OFF, CONFIG_JFFS2_NAND_SIZE,
CONFIG_JFFS2_NAND_DEV
diff --git a/doc/README.android-fastboot b/doc/README.android-fastboot
index f1d128c..430e29c 100644
--- a/doc/README.android-fastboot
+++ b/doc/README.android-fastboot
@@ -6,8 +6,9 @@ Overview
The protocol that is used over USB is described in
README.android-fastboot-protocol in same directory.

-The current implementation does not yet support the flash and erase
-commands.
+The current implementation does not yet support the erase command or the
+"oem format" command, and there is minimal support for the flash command;
+it only supports eMMC devices.

Client installation
===================
diff --git a/drivers/usb/gadget/f_fastboot.c b/drivers/usb/gadget/f_fastboot.c
index 7a1acb9..e2659fa 100644
--- a/drivers/usb/gadget/f_fastboot.c
+++ b/drivers/usb/gadget/f_fastboot.c
@@ -19,6 +19,9 @@
#include <linux/compiler.h>
#include <version.h>
#include <g_dnl.h>
+#ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV
+#include <fb_mmc.h>
+#endif

#define FASTBOOT_VERSION "0.4"

@@ -469,6 +472,28 @@ static void cb_boot(struct usb_ep *ep, struct usb_request *req)
fastboot_tx_write_str("OKAY");
}

+#ifdef CONFIG_FASTBOOT_FLASH
+static void cb_flash(struct usb_ep *ep, struct usb_request *req)
+{
+ char *cmd = req->buf;
+ char response[RESPONSE_LEN];
+
+ strsep(&cmd, ":");
+ if (!cmd) {
+ printf("%s: missing partition name\n", __func__);
+ fastboot_tx_write_str("FAILmissing partition name");
+ return;
+ }
+
+ strcpy(response, "FAILno flash device defined");
+#ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV
+ fb_mmc_flash_write(cmd, (void *)CONFIG_USB_FASTBOOT_BUF_ADDR,
+ download_bytes, response);
+#endif
+ fastboot_tx_write_str(response);
+}
+#endif
+
struct cmd_dispatch_info {
char *cmd;
void (*cb)(struct usb_ep *ep, struct usb_request *req);
@@ -488,6 +513,12 @@ static const struct cmd_dispatch_info cmd_dispatch_info[] = {
.cmd = "boot",
.cb = cb_boot,
},
+#ifdef CONFIG_FASTBOOT_FLASH
+ {
+ .cmd = "flash",
+ .cb = cb_flash,
+ },
+#endif
};

static void rx_handler_command(struct usb_ep *ep, struct usb_request *req)
--
1.8.5