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Implement USB "flash drive" gadget

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This commit is contained in:
George Hilliard 2019-07-30 21:07:02 -05:00
parent 25609ac32c
commit 0033ca1c38
5 changed files with 47 additions and 1 deletions
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15
board/businesscard/rootfs_overlay/etc/init.d/S99flashdrive Executable file
View file

@ -0,0 +1,15 @@
#! /bin/sh
case "$1" in
start|"")
echo 1 > /sys/class/udc/musb-hdrc.1.auto/device/gadget/lun0/ro
echo /dev/ubiblock0_3 > /sys/class/udc/musb-hdrc.1.auto/device/gadget/lun0/file
;;
stop)
echo '' > /sys/class/udc/musb-hdrc.1.auto/device/gadget/lun0/file
;;
*)
echo "Usage: flashdrive {start|stop}" >&2
exit 1
;;
esac

26
board/businesscard/v1/genimage.cfg
View file

@ -20,6 +20,28 @@ image flash.bin {
}
}
image flashdrive.vfat {
vfat {
files = {
"George Hilliard resume.pdf",
"README.txt"
}
}
size = 96K
}
image flashdrive.img {
hdimage {}
partition businesscard {
partition-type = 0xc
image = "flashdrive.vfat"
}
// Hardcode a size here to help the ubi builder, which cannot infer a size
// of this image or wait until this image is built, due to the design of
// genimage.
size = 97K
}
image root.ubi {
ubi {}
partition kernel {
@ -34,6 +56,10 @@ image root.ubi {
image = "rootfs.squashfs"
read-only = true
}
partition flashdrive {
image = flashdrive.img
read-only = true
}
}
image boot.vfat {

3
board/businesscard/v1/post-build.sh Executable file
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@ -0,0 +1,3 @@
#!/bin/sh
grep -q "GADGET_SERIAL" "${TARGET_DIR}/etc/inittab" \
|| echo '/dev/ttyGS0::respawn:/sbin/getty -L /dev/ttyGS0 0 vt100 # GADGET_SERIAL' >> "${TARGET_DIR}/etc/inittab"

2
board/businesscard/v1/uboot_defconfig
View file

@ -10,7 +10,7 @@ CONFIG_DRAM_ZQ=0
CONFIG_SPL_SPI_SUNXI=y
# CONFIG_FIT is not set
CONFIG_BOOTDELAY=0
CONFIG_BOOTCOMMAND="setenv bootargs console=ttyS0,115200 ubi.mtd=1 ubi.block=0,root root=/dev/ubiblock0_2; sf probe 0 20000000; ubi part rootubi; ubi read ${kernel_addr_r} kernel; ubi read ${fdt_addr_r} dtb; bootz ${kernel_addr_r} - ${fdt_addr_r}"
CONFIG_BOOTCOMMAND="setenv bootargs console=ttyS0,115200 ubi.mtd=1 ubi.block=0,root ubi.block=0,flashdrive root=/dev/ubiblock0_2 g_acm_ms.removable=1; sf probe 0 20000000; ubi part rootubi; ubi read ${kernel_addr_r} kernel; ubi read ${fdt_addr_r} dtb; bootz ${kernel_addr_r} - ${fdt_addr_r}"
CONFIG_LOG_MAX_LEVEL=6
CONFIG_LOG_ERROR_RETURN=y
# CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR is not set

2
configs/thirtythreeforty_businesscard_defconfig
View file

@ -12,6 +12,8 @@ BR2_TARGET_GENERIC_ISSUE="Welcome to Businesscard Linux!"
BR2_TARGET_GENERIC_GETTY_PORT="/dev/ttyS0"
BR2_TARGET_GENERIC_GETTY_BAUDRATE_115200=y
# BR2_TARGET_GENERIC_REMOUNT_ROOTFS_RW is not set
BR2_ROOTFS_OVERLAY="$(BR2_EXTERNAL_BUSINESSCARD_PATH)/board/businesscard/rootfs_overlay"
BR2_ROOTFS_POST_BUILD_SCRIPT="$(BR2_EXTERNAL_BUSINESSCARD_PATH)/board/businesscard/v1/post-build.sh"
BR2_ROOTFS_POST_IMAGE_SCRIPT="support/scripts/genimage.sh"
BR2_ROOTFS_POST_SCRIPT_ARGS="-c $(BR2_EXTERNAL_BUSINESSCARD_PATH)/board/businesscard/v1/genimage.cfg"
BR2_LINUX_KERNEL=y