usb/gadget: fastboot: add support for flash command
- implement 'fastboot flash' for eMMC devices
Signed-off-by: Steve Rae <srae@broadcom.com>
Acked-by: Lukasz Majewski <l.majewski@samsung.com>
Reviewed-by: Marek Vasut <marex@denx.de>
diff --git a/README b/README
index 70dd97d..766e9e0 100644
--- a/README
+++ b/README
@@ -1629,6 +1629,16 @@
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 additional 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 4045727..1677609 100644
--- a/doc/README.android-fastboot
+++ b/doc/README.android-fastboot
@@ -6,8 +6,9 @@
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 @@
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 @@
.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)