usb: Fastboot function config for better consistency with other functions

USB download gadget functions such as thor and dfu have a separate config option
for the USB gadget part of the code, independent from the command part.
This switches the fastboot USB gadget to the same scheme, for better
consistency.

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Tested-by: Lukasz Majewski <l.majewski@samsung.com>

Test HW: Odroid_XU3 (Exynos5422), trats (Exynos4210)

README

@@ -1716,6 +1716,9 @@ The following options need to be configured:
 		sending again an USB request to the device.
 
 - USB Device Android Fastboot support:
+		CONFIG_USB_FUNCTION_FASTBOOT
+		This enables the USB part of the fastboot gadget
+
 		CONFIG_CMD_FASTBOOT
 		This enables the command "fastboot" which enables the Android
 		fastboot mode for the platform's USB device. Fastboot is a USB

arch/arm/cpu/armv7/omap-common/boot-common.c

@@ -163,7 +163,7 @@ void arch_preboot_os(void)
 }
 #endif
 
-#if defined(CONFIG_CMD_FASTBOOT) && !defined(CONFIG_ENV_IS_NOWHERE)
+#if defined(CONFIG_USB_FUNCTION_FASTBOOT) && !defined(CONFIG_ENV_IS_NOWHERE)
 int fb_set_reboot_flag(void)
 {
 	printf("Setting reboot to fastboot flag ...\n");

doc/README.android-fastboot

@@ -42,8 +42,8 @@ NOTE: The CONFIG_G_DNL_VENDOR_NUM must be one of the numbers supported by
 the fastboot client. The list of vendor IDs supported can be found in the
 fastboot client source code (fastboot.c) mentioned above.
 
-The fastboot function is enabled by defining CONFIG_CMD_FASTBOOT and
-CONFIG_ANDROID_BOOT_IMAGE.
+The fastboot function is enabled by defining CONFIG_USB_FUNCTION_FASTBOOT,
+CONFIG_CMD_FASTBOOT and CONFIG_ANDROID_BOOT_IMAGE.
 
 The fastboot protocol requires a large memory buffer for downloads. This
 buffer should be as large as possible for a platform. The location of the

drivers/usb/gadget/Makefile

@@ -19,7 +19,7 @@ obj-$(CONFIG_USB_GADGET_DOWNLOAD) += g_dnl.o
 obj-$(CONFIG_USB_FUNCTION_THOR) += f_thor.o
 obj-$(CONFIG_USB_FUNCTION_DFU) += f_dfu.o
 obj-$(CONFIG_USB_FUNCTION_MASS_STORAGE) += f_mass_storage.o
-obj-$(CONFIG_CMD_FASTBOOT) += f_fastboot.o
+obj-$(CONFIG_USB_FUNCTION_FASTBOOT) += f_fastboot.o
 endif
 ifdef CONFIG_USB_ETHER
 obj-y += ether.o

include/configs/am335x_evm.h

@@ -298,6 +298,7 @@
 
 #ifndef CONFIG_SPL_USBETH_SUPPORT
 /* Fastboot */
+#define CONFIG_USB_FUNCTION_FASTBOOT
 #define CONFIG_CMD_FASTBOOT
 #define CONFIG_ANDROID_BOOT_IMAGE
 #define CONFIG_USB_FASTBOOT_BUF_ADDR	CONFIG_SYS_LOAD_ADDR

include/configs/bav335x.h

@@ -455,6 +455,7 @@ DEFAULT_LINUX_BOOT_ENV \
 
 #ifndef CONFIG_SPL_USBETH_SUPPORT
 /* Fastboot */
+#define CONFIG_USB_FUNCTION_FASTBOOT
 #define CONFIG_CMD_FASTBOOT
 #define CONFIG_ANDROID_BOOT_IMAGE
 #define CONFIG_USB_FASTBOOT_BUF_ADDR	CONFIG_SYS_LOAD_ADDR

include/configs/dra7xx_evm.h

@@ -89,6 +89,7 @@
 	DFU_ALT_INFO_RAM
 
 /* Fastboot */
+#define CONFIG_USB_FUNCTION_FASTBOOT
 #define CONFIG_CMD_FASTBOOT
 #define CONFIG_ANDROID_BOOT_IMAGE
 #define CONFIG_USB_FASTBOOT_BUF_ADDR    CONFIG_SYS_LOAD_ADDR

include/configs/nitrogen6x.h

@@ -346,6 +346,7 @@
 #define CONFIG_G_DNL_PRODUCT_NUM 0xa4a5
 #define CONFIG_G_DNL_MANUFACTURER "Boundary"
 
+#define CONFIG_USB_FUNCTION_FASTBOOT
 #define CONFIG_CMD_FASTBOOT
 #define CONFIG_ANDROID_BOOT_IMAGE
 #define CONFIG_USB_FASTBOOT_BUF_ADDR   CONFIG_SYS_LOAD_ADDR

include/configs/omap3_beagle.h

@@ -72,6 +72,7 @@
 #define CONFIG_G_DNL_VENDOR_NUM		0x0451
 #define CONFIG_G_DNL_PRODUCT_NUM	0xd022
 #define CONFIG_G_DNL_MANUFACTURER	"TI"
+#define CONFIG_USB_FUNCTION_FASTBOOT
 #define CONFIG_CMD_FASTBOOT
 #define CONFIG_ANDROID_BOOT_IMAGE
 #define CONFIG_USB_FASTBOOT_BUF_ADDR	CONFIG_SYS_LOAD_ADDR