| /* |
| * Copyright (c) 2013 Sergey 'Jin' Bostandzhyan |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| /* This is a hack for Rockchip rk3x based devices. The problem is that |
| * the MEMERASE ioctl is failing (hangs and never returns) in their kernel. |
| * The sources are not fully available, so fixing it in the rk30xxnand_ko driver |
| * is not possible. |
| * |
| * I straced the stock recovery application and it seems to avoid this |
| * particular ioctl, instead it is simply writing zeroes using the write() call. |
| * |
| * This workaround does the same and will replace all MEMERASE occurances in |
| * the recovery code. |
| */ |
| |
| #ifndef __RK3X_HACK_H__ |
| #define __RK3X_HACK_H__ |
| |
| #include <sys/types.h> // for size_t, etc. |
| |
| // write zeroes to fd at position pos |
| int zero_out(int fd, off_t pos, ssize_t length); |
| |
| #endif//__RK3X_HACK_H__ |