rockusb protocol has been introduced by Eddie Cai in U-Boot mainline allowing to write internal eMMC of RK3288 based boards (and potentially all other Rockchip's CPUs).
On workstation side the open source project rkdeveloptool do implement the rockusb protocol. You can find it on GitHub here: https://github.com/rockchip-linux/rkdeveloptool
This patchset increase the supported functionalities on target side allowing developers to: - Read flash: rl command of rkdeveloptool - Read chip version: rci command of rkdeveloptool - Complete the write cycle implementing block erase - Improve read/write speed
Changes in v2: - Reworked patch 1/8 to obtain simpler and more logical code - Rewrote some patch messages - Updated documentation in README.rockusb patch by patch - Added patch 8/8 to fix debug prints of original code
Changes in v3: - Removed magic block size of 512 bytes for all implemented commands original behavior of re-probing a non present block device (like a non plugged SD-Card) is kept
Alberto Panizzo (9): usb: rockchip: fix command failed on host side due to missing data usb: rockchip: implement skeleton for K_FW_GET_CHIP_VER command rockchip: rk3288: implement reading chip version from bootrom code usb: rockchip: implement K_FW_LBA_READ_10 command usb: rockchip: implement K_FW_LBA_ERASE_10 command usb: rockchip: be quiet on serial port while transferring data usb: rockchip: boost up write speed from 4MB/s to 15MB/s usb: rockchip: fix printing csw debug info usb: rockchip: on K_FW_LBA_WRITE_10 remove magic block size of 512 bytes
arch/arm/include/asm/arch-rockchip/f_rockusb.h | 6 +- arch/arm/mach-rockchip/rk3288/Makefile | 1 + arch/arm/mach-rockchip/rk3288/rockusb_rk3288.c | 30 +++ doc/README.rockusb | 11 +- drivers/usb/gadget/f_rockusb.c | 261 ++++++++++++++++++++++--- 5 files changed, 281 insertions(+), 28 deletions(-) create mode 100644 arch/arm/mach-rockchip/rk3288/rockusb_rk3288.c