[U-Boot-Users] usb storage support?

Hi, all,

Does u-boot support OHCI? README mentions that u-boot only support UHCI, however, there are some c files named "usb_ohci" in cpu directory. Does it mean u-boot also supports OHCI?

Does u-boot support write action on usb storage? I have surfed usb codes, but I only found some functions for reading from usb storage, no any functions for writing found. Is it true or just my misunderstanding?

Could someone kindly give me answer or tell me how or where can I get the answer?

Thanks in advance.